1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> 4 * Copyright (C) 2018 Samsung Electronics Co., Ltd. 5 */ 6 7#include <linux/inetdevice.h> 8#include <net/addrconf.h> 9#include <linux/syscalls.h> 10#include <linux/namei.h> 11#include <linux/statfs.h> 12#include <linux/ethtool.h> 13#include <linux/falloc.h> 14#include <linux/mount.h> 15#include <linux/filelock.h> 16 17#include "glob.h" 18#include "smbfsctl.h" 19#include "oplock.h" 20#include "smbacl.h" 21 22#include "auth.h" 23#include "asn1.h" 24#include "connection.h" 25#include "transport_ipc.h" 26#include "transport_rdma.h" 27#include "vfs.h" 28#include "vfs_cache.h" 29#include "misc.h" 30 31#include "server.h" 32#include "smb_common.h" 33#include "smbstatus.h" 34#include "ksmbd_work.h" 35#include "mgmt/user_config.h" 36#include "mgmt/share_config.h" 37#include "mgmt/tree_connect.h" 38#include "mgmt/user_session.h" 39#include "mgmt/ksmbd_ida.h" 40#include "ndr.h" 41 42static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) 43{ 44 if (work->next_smb2_rcv_hdr_off) { 45 *req = ksmbd_req_buf_next(work); 46 *rsp = ksmbd_resp_buf_next(work); 47 } else { 48 *req = smb2_get_msg(work->request_buf); 49 *rsp = smb2_get_msg(work->response_buf); 50 } 51} 52 53#define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) 54 55/** 56 * check_session_id() - check for valid session id in smb header 57 * @conn: connection instance 58 * @id: session id from smb header 59 * 60 * Return: 1 if valid session id, otherwise 0 61 */ 62static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) 63{ 64 struct ksmbd_session *sess; 65 66 if (id == 0 || id == -1) 67 return false; 68 69 sess = ksmbd_session_lookup_all(conn, id); 70 if (sess) 71 return true; 72 pr_err("Invalid user session id: %llu\n", id); 73 return false; 74} 75 76struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) 77{ 78 return xa_load(&sess->ksmbd_chann_list, (long)conn); 79} 80 81/** 82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. 83 * @work: smb work 84 * 85 * Return: 0 if there is a tree connection matched or these are 86 * skipable commands, otherwise error 87 */ 88int smb2_get_ksmbd_tcon(struct ksmbd_work *work) 89{ 90 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 91 unsigned int cmd = le16_to_cpu(req_hdr->Command); 92 unsigned int tree_id; 93 94 if (cmd == SMB2_TREE_CONNECT_HE || 95 cmd == SMB2_CANCEL_HE || 96 cmd == SMB2_LOGOFF_HE) { 97 ksmbd_debug(SMB, "skip to check tree connect request\n"); 98 return 0; 99 } 100 101 if (xa_empty(&work->sess->tree_conns)) { 102 ksmbd_debug(SMB, "NO tree connected\n"); 103 return -ENOENT; 104 } 105 106 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); 107 108 /* 109 * If request is not the first in Compound request, 110 * Just validate tree id in header with work->tcon->id. 111 */ 112 if (work->next_smb2_rcv_hdr_off) { 113 if (!work->tcon) { 114 pr_err("The first operation in the compound does not have tcon\n"); 115 return -EINVAL; 116 } 117 if (tree_id != UINT_MAX && work->tcon->id != tree_id) { 118 pr_err("tree id(%u) is different with id(%u) in first operation\n", 119 tree_id, work->tcon->id); 120 return -EINVAL; 121 } 122 return 1; 123 } 124 125 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); 126 if (!work->tcon) { 127 pr_err("Invalid tid %d\n", tree_id); 128 return -ENOENT; 129 } 130 131 return 1; 132} 133 134/** 135 * smb2_set_err_rsp() - set error response code on smb response 136 * @work: smb work containing response buffer 137 */ 138void smb2_set_err_rsp(struct ksmbd_work *work) 139{ 140 struct smb2_err_rsp *err_rsp; 141 142 if (work->next_smb2_rcv_hdr_off) 143 err_rsp = ksmbd_resp_buf_next(work); 144 else 145 err_rsp = smb2_get_msg(work->response_buf); 146 147 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { 148 int err; 149 150 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; 151 err_rsp->ErrorContextCount = 0; 152 err_rsp->Reserved = 0; 153 err_rsp->ByteCount = 0; 154 err_rsp->ErrorData[0] = 0; 155 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, 156 __SMB2_HEADER_STRUCTURE_SIZE + 157 SMB2_ERROR_STRUCTURE_SIZE2); 158 if (err) 159 work->send_no_response = 1; 160 } 161} 162 163/** 164 * is_smb2_neg_cmd() - is it smb2 negotiation command 165 * @work: smb work containing smb header 166 * 167 * Return: true if smb2 negotiation command, otherwise false 168 */ 169bool is_smb2_neg_cmd(struct ksmbd_work *work) 170{ 171 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 172 173 /* is it SMB2 header ? */ 174 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 175 return false; 176 177 /* make sure it is request not response message */ 178 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) 179 return false; 180 181 if (hdr->Command != SMB2_NEGOTIATE) 182 return false; 183 184 return true; 185} 186 187/** 188 * is_smb2_rsp() - is it smb2 response 189 * @work: smb work containing smb response buffer 190 * 191 * Return: true if smb2 response, otherwise false 192 */ 193bool is_smb2_rsp(struct ksmbd_work *work) 194{ 195 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); 196 197 /* is it SMB2 header ? */ 198 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 199 return false; 200 201 /* make sure it is response not request message */ 202 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) 203 return false; 204 205 return true; 206} 207 208/** 209 * get_smb2_cmd_val() - get smb command code from smb header 210 * @work: smb work containing smb request buffer 211 * 212 * Return: smb2 request command value 213 */ 214u16 get_smb2_cmd_val(struct ksmbd_work *work) 215{ 216 struct smb2_hdr *rcv_hdr; 217 218 if (work->next_smb2_rcv_hdr_off) 219 rcv_hdr = ksmbd_req_buf_next(work); 220 else 221 rcv_hdr = smb2_get_msg(work->request_buf); 222 return le16_to_cpu(rcv_hdr->Command); 223} 224 225/** 226 * set_smb2_rsp_status() - set error response code on smb2 header 227 * @work: smb work containing response buffer 228 * @err: error response code 229 */ 230void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) 231{ 232 struct smb2_hdr *rsp_hdr; 233 234 rsp_hdr = smb2_get_msg(work->response_buf); 235 rsp_hdr->Status = err; 236 237 work->iov_idx = 0; 238 work->iov_cnt = 0; 239 work->next_smb2_rcv_hdr_off = 0; 240 smb2_set_err_rsp(work); 241} 242 243/** 244 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command 245 * @work: smb work containing smb request buffer 246 * 247 * smb2 negotiate response is sent in reply of smb1 negotiate command for 248 * dialect auto-negotiation. 249 */ 250int init_smb2_neg_rsp(struct ksmbd_work *work) 251{ 252 struct smb2_hdr *rsp_hdr; 253 struct smb2_negotiate_rsp *rsp; 254 struct ksmbd_conn *conn = work->conn; 255 int err; 256 257 rsp_hdr = smb2_get_msg(work->response_buf); 258 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 259 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 260 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 261 rsp_hdr->CreditRequest = cpu_to_le16(2); 262 rsp_hdr->Command = SMB2_NEGOTIATE; 263 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 264 rsp_hdr->NextCommand = 0; 265 rsp_hdr->MessageId = 0; 266 rsp_hdr->Id.SyncId.ProcessId = 0; 267 rsp_hdr->Id.SyncId.TreeId = 0; 268 rsp_hdr->SessionId = 0; 269 memset(rsp_hdr->Signature, 0, 16); 270 271 rsp = smb2_get_msg(work->response_buf); 272 273 WARN_ON(ksmbd_conn_good(conn)); 274 275 rsp->StructureSize = cpu_to_le16(65); 276 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); 277 rsp->DialectRevision = cpu_to_le16(conn->dialect); 278 /* Not setting conn guid rsp->ServerGUID, as it 279 * not used by client for identifying connection 280 */ 281 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 282 /* Default Max Message Size till SMB2.0, 64K*/ 283 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 284 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 285 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 286 287 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 288 rsp->ServerStartTime = 0; 289 290 rsp->SecurityBufferOffset = cpu_to_le16(128); 291 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 292 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 293 le16_to_cpu(rsp->SecurityBufferOffset)); 294 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 295 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) 296 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 297 err = ksmbd_iov_pin_rsp(work, rsp, 298 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); 299 if (err) 300 return err; 301 conn->use_spnego = true; 302 303 ksmbd_conn_set_need_negotiate(conn); 304 return 0; 305} 306 307/** 308 * smb2_set_rsp_credits() - set number of credits in response buffer 309 * @work: smb work containing smb response buffer 310 */ 311int smb2_set_rsp_credits(struct ksmbd_work *work) 312{ 313 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 314 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); 315 struct ksmbd_conn *conn = work->conn; 316 unsigned short credits_requested, aux_max; 317 unsigned short credit_charge, credits_granted = 0; 318 319 if (work->send_no_response) 320 return 0; 321 322 hdr->CreditCharge = req_hdr->CreditCharge; 323 324 if (conn->total_credits > conn->vals->max_credits) { 325 hdr->CreditRequest = 0; 326 pr_err("Total credits overflow: %d\n", conn->total_credits); 327 return -EINVAL; 328 } 329 330 credit_charge = max_t(unsigned short, 331 le16_to_cpu(req_hdr->CreditCharge), 1); 332 if (credit_charge > conn->total_credits) { 333 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", 334 credit_charge, conn->total_credits); 335 return -EINVAL; 336 } 337 338 conn->total_credits -= credit_charge; 339 conn->outstanding_credits -= credit_charge; 340 credits_requested = max_t(unsigned short, 341 le16_to_cpu(req_hdr->CreditRequest), 1); 342 343 /* according to smb2.credits smbtorture, Windows server 344 * 2016 or later grant up to 8192 credits at once. 345 * 346 * TODO: Need to adjuct CreditRequest value according to 347 * current cpu load 348 */ 349 if (hdr->Command == SMB2_NEGOTIATE) 350 aux_max = 1; 351 else 352 aux_max = conn->vals->max_credits - conn->total_credits; 353 credits_granted = min_t(unsigned short, credits_requested, aux_max); 354 355 conn->total_credits += credits_granted; 356 work->credits_granted += credits_granted; 357 358 if (!req_hdr->NextCommand) { 359 /* Update CreditRequest in last request */ 360 hdr->CreditRequest = cpu_to_le16(work->credits_granted); 361 } 362 ksmbd_debug(SMB, 363 "credits: requested[%d] granted[%d] total_granted[%d]\n", 364 credits_requested, credits_granted, 365 conn->total_credits); 366 return 0; 367} 368 369/** 370 * init_chained_smb2_rsp() - initialize smb2 chained response 371 * @work: smb work containing smb response buffer 372 */ 373static void init_chained_smb2_rsp(struct ksmbd_work *work) 374{ 375 struct smb2_hdr *req = ksmbd_req_buf_next(work); 376 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); 377 struct smb2_hdr *rsp_hdr; 378 struct smb2_hdr *rcv_hdr; 379 int next_hdr_offset = 0; 380 int len, new_len; 381 382 /* Len of this response = updated RFC len - offset of previous cmd 383 * in the compound rsp 384 */ 385 386 /* Storing the current local FID which may be needed by subsequent 387 * command in the compound request 388 */ 389 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { 390 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; 391 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; 392 work->compound_sid = le64_to_cpu(rsp->SessionId); 393 } 394 395 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; 396 next_hdr_offset = le32_to_cpu(req->NextCommand); 397 398 new_len = ALIGN(len, 8); 399 work->iov[work->iov_idx].iov_len += (new_len - len); 400 inc_rfc1001_len(work->response_buf, new_len - len); 401 rsp->NextCommand = cpu_to_le32(new_len); 402 403 work->next_smb2_rcv_hdr_off += next_hdr_offset; 404 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 405 work->next_smb2_rsp_hdr_off += new_len; 406 ksmbd_debug(SMB, 407 "Compound req new_len = %d rcv off = %d rsp off = %d\n", 408 new_len, work->next_smb2_rcv_hdr_off, 409 work->next_smb2_rsp_hdr_off); 410 411 rsp_hdr = ksmbd_resp_buf_next(work); 412 rcv_hdr = ksmbd_req_buf_next(work); 413 414 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 415 ksmbd_debug(SMB, "related flag should be set\n"); 416 work->compound_fid = KSMBD_NO_FID; 417 work->compound_pfid = KSMBD_NO_FID; 418 } 419 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 420 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; 421 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 422 rsp_hdr->Command = rcv_hdr->Command; 423 424 /* 425 * Message is response. We don't grant oplock yet. 426 */ 427 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | 428 SMB2_FLAGS_RELATED_OPERATIONS); 429 rsp_hdr->NextCommand = 0; 430 rsp_hdr->MessageId = rcv_hdr->MessageId; 431 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 432 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 433 rsp_hdr->SessionId = rcv_hdr->SessionId; 434 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 435} 436 437/** 438 * is_chained_smb2_message() - check for chained command 439 * @work: smb work containing smb request buffer 440 * 441 * Return: true if chained request, otherwise false 442 */ 443bool is_chained_smb2_message(struct ksmbd_work *work) 444{ 445 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 446 unsigned int len, next_cmd; 447 448 if (hdr->ProtocolId != SMB2_PROTO_NUMBER) 449 return false; 450 451 hdr = ksmbd_req_buf_next(work); 452 next_cmd = le32_to_cpu(hdr->NextCommand); 453 if (next_cmd > 0) { 454 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + 455 __SMB2_HEADER_STRUCTURE_SIZE > 456 get_rfc1002_len(work->request_buf)) { 457 pr_err("next command(%u) offset exceeds smb msg size\n", 458 next_cmd); 459 return false; 460 } 461 462 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > 463 work->response_sz) { 464 pr_err("next response offset exceeds response buffer size\n"); 465 return false; 466 } 467 468 ksmbd_debug(SMB, "got SMB2 chained command\n"); 469 init_chained_smb2_rsp(work); 470 return true; 471 } else if (work->next_smb2_rcv_hdr_off) { 472 /* 473 * This is last request in chained command, 474 * align response to 8 byte 475 */ 476 len = ALIGN(get_rfc1002_len(work->response_buf), 8); 477 len = len - get_rfc1002_len(work->response_buf); 478 if (len) { 479 ksmbd_debug(SMB, "padding len %u\n", len); 480 work->iov[work->iov_idx].iov_len += len; 481 inc_rfc1001_len(work->response_buf, len); 482 } 483 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; 484 } 485 return false; 486} 487 488/** 489 * init_smb2_rsp_hdr() - initialize smb2 response 490 * @work: smb work containing smb request buffer 491 * 492 * Return: 0 493 */ 494int init_smb2_rsp_hdr(struct ksmbd_work *work) 495{ 496 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); 497 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); 498 499 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); 500 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; 501 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; 502 rsp_hdr->Command = rcv_hdr->Command; 503 504 /* 505 * Message is response. We don't grant oplock yet. 506 */ 507 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); 508 rsp_hdr->NextCommand = 0; 509 rsp_hdr->MessageId = rcv_hdr->MessageId; 510 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; 511 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; 512 rsp_hdr->SessionId = rcv_hdr->SessionId; 513 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); 514 515 return 0; 516} 517 518/** 519 * smb2_allocate_rsp_buf() - allocate smb2 response buffer 520 * @work: smb work containing smb request buffer 521 * 522 * Return: 0 on success, otherwise -ENOMEM 523 */ 524int smb2_allocate_rsp_buf(struct ksmbd_work *work) 525{ 526 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 527 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; 528 size_t large_sz = small_sz + work->conn->vals->max_trans_size; 529 size_t sz = small_sz; 530 int cmd = le16_to_cpu(hdr->Command); 531 532 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) 533 sz = large_sz; 534 535 if (cmd == SMB2_QUERY_INFO_HE) { 536 struct smb2_query_info_req *req; 537 538 req = smb2_get_msg(work->request_buf); 539 if ((req->InfoType == SMB2_O_INFO_FILE && 540 (req->FileInfoClass == FILE_FULL_EA_INFORMATION || 541 req->FileInfoClass == FILE_ALL_INFORMATION)) || 542 req->InfoType == SMB2_O_INFO_SECURITY) 543 sz = large_sz; 544 } 545 546 /* allocate large response buf for chained commands */ 547 if (le32_to_cpu(hdr->NextCommand) > 0) 548 sz = large_sz; 549 550 work->response_buf = kvzalloc(sz, GFP_KERNEL); 551 if (!work->response_buf) 552 return -ENOMEM; 553 554 work->response_sz = sz; 555 return 0; 556} 557 558/** 559 * smb2_check_user_session() - check for valid session for a user 560 * @work: smb work containing smb request buffer 561 * 562 * Return: 0 on success, otherwise error 563 */ 564int smb2_check_user_session(struct ksmbd_work *work) 565{ 566 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); 567 struct ksmbd_conn *conn = work->conn; 568 unsigned int cmd = le16_to_cpu(req_hdr->Command); 569 unsigned long long sess_id; 570 571 /* 572 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not 573 * require a session id, so no need to validate user session's for 574 * these commands. 575 */ 576 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || 577 cmd == SMB2_SESSION_SETUP_HE) 578 return 0; 579 580 if (!ksmbd_conn_good(conn)) 581 return -EIO; 582 583 sess_id = le64_to_cpu(req_hdr->SessionId); 584 585 /* 586 * If request is not the first in Compound request, 587 * Just validate session id in header with work->sess->id. 588 */ 589 if (work->next_smb2_rcv_hdr_off) { 590 if (!work->sess) { 591 pr_err("The first operation in the compound does not have sess\n"); 592 return -EINVAL; 593 } 594 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { 595 pr_err("session id(%llu) is different with the first operation(%lld)\n", 596 sess_id, work->sess->id); 597 return -EINVAL; 598 } 599 return 1; 600 } 601 602 /* Check for validity of user session */ 603 work->sess = ksmbd_session_lookup_all(conn, sess_id); 604 if (work->sess) 605 return 1; 606 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); 607 return -ENOENT; 608} 609 610static void destroy_previous_session(struct ksmbd_conn *conn, 611 struct ksmbd_user *user, u64 id) 612{ 613 struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id); 614 struct ksmbd_user *prev_user; 615 struct channel *chann; 616 long index; 617 618 if (!prev_sess) 619 return; 620 621 prev_user = prev_sess->user; 622 623 if (!prev_user || 624 strcmp(user->name, prev_user->name) || 625 user->passkey_sz != prev_user->passkey_sz || 626 memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) 627 return; 628 629 prev_sess->state = SMB2_SESSION_EXPIRED; 630 xa_for_each(&prev_sess->ksmbd_chann_list, index, chann) 631 ksmbd_conn_set_exiting(chann->conn); 632} 633 634/** 635 * smb2_get_name() - get filename string from on the wire smb format 636 * @src: source buffer 637 * @maxlen: maxlen of source string 638 * @local_nls: nls_table pointer 639 * 640 * Return: matching converted filename on success, otherwise error ptr 641 */ 642static char * 643smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) 644{ 645 char *name; 646 647 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); 648 if (IS_ERR(name)) { 649 pr_err("failed to get name %ld\n", PTR_ERR(name)); 650 return name; 651 } 652 653 ksmbd_conv_path_to_unix(name); 654 ksmbd_strip_last_slash(name); 655 return name; 656} 657 658int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) 659{ 660 struct ksmbd_conn *conn = work->conn; 661 int id; 662 663 id = ksmbd_acquire_async_msg_id(&conn->async_ida); 664 if (id < 0) { 665 pr_err("Failed to alloc async message id\n"); 666 return id; 667 } 668 work->asynchronous = true; 669 work->async_id = id; 670 671 ksmbd_debug(SMB, 672 "Send interim Response to inform async request id : %d\n", 673 work->async_id); 674 675 work->cancel_fn = fn; 676 work->cancel_argv = arg; 677 678 if (list_empty(&work->async_request_entry)) { 679 spin_lock(&conn->request_lock); 680 list_add_tail(&work->async_request_entry, &conn->async_requests); 681 spin_unlock(&conn->request_lock); 682 } 683 684 return 0; 685} 686 687void release_async_work(struct ksmbd_work *work) 688{ 689 struct ksmbd_conn *conn = work->conn; 690 691 spin_lock(&conn->request_lock); 692 list_del_init(&work->async_request_entry); 693 spin_unlock(&conn->request_lock); 694 695 work->asynchronous = 0; 696 work->cancel_fn = NULL; 697 kfree(work->cancel_argv); 698 work->cancel_argv = NULL; 699 if (work->async_id) { 700 ksmbd_release_id(&conn->async_ida, work->async_id); 701 work->async_id = 0; 702 } 703} 704 705void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) 706{ 707 struct smb2_hdr *rsp_hdr; 708 struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); 709 710 if (allocate_interim_rsp_buf(in_work)) { 711 pr_err("smb_allocate_rsp_buf failed!\n"); 712 ksmbd_free_work_struct(in_work); 713 return; 714 } 715 716 in_work->conn = work->conn; 717 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), 718 __SMB2_HEADER_STRUCTURE_SIZE); 719 720 rsp_hdr = smb2_get_msg(in_work->response_buf); 721 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; 722 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); 723 smb2_set_err_rsp(in_work); 724 rsp_hdr->Status = status; 725 726 ksmbd_conn_write(in_work); 727 ksmbd_free_work_struct(in_work); 728} 729 730static __le32 smb2_get_reparse_tag_special_file(umode_t mode) 731{ 732 if (S_ISDIR(mode) || S_ISREG(mode)) 733 return 0; 734 735 if (S_ISLNK(mode)) 736 return IO_REPARSE_TAG_LX_SYMLINK_LE; 737 else if (S_ISFIFO(mode)) 738 return IO_REPARSE_TAG_LX_FIFO_LE; 739 else if (S_ISSOCK(mode)) 740 return IO_REPARSE_TAG_AF_UNIX_LE; 741 else if (S_ISCHR(mode)) 742 return IO_REPARSE_TAG_LX_CHR_LE; 743 else if (S_ISBLK(mode)) 744 return IO_REPARSE_TAG_LX_BLK_LE; 745 746 return 0; 747} 748 749/** 750 * smb2_get_dos_mode() - get file mode in dos format from unix mode 751 * @stat: kstat containing file mode 752 * @attribute: attribute flags 753 * 754 * Return: converted dos mode 755 */ 756static int smb2_get_dos_mode(struct kstat *stat, int attribute) 757{ 758 int attr = 0; 759 760 if (S_ISDIR(stat->mode)) { 761 attr = FILE_ATTRIBUTE_DIRECTORY | 762 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); 763 } else { 764 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; 765 attr &= ~(FILE_ATTRIBUTE_DIRECTORY); 766 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & 767 FILE_SUPPORTS_SPARSE_FILES)) 768 attr |= FILE_ATTRIBUTE_SPARSE_FILE; 769 770 if (smb2_get_reparse_tag_special_file(stat->mode)) 771 attr |= FILE_ATTRIBUTE_REPARSE_POINT; 772 } 773 774 return attr; 775} 776 777static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, 778 __le16 hash_id) 779{ 780 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; 781 pneg_ctxt->DataLength = cpu_to_le16(38); 782 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); 783 pneg_ctxt->Reserved = cpu_to_le32(0); 784 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); 785 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); 786 pneg_ctxt->HashAlgorithms = hash_id; 787} 788 789static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, 790 __le16 cipher_type) 791{ 792 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; 793 pneg_ctxt->DataLength = cpu_to_le16(4); 794 pneg_ctxt->Reserved = cpu_to_le32(0); 795 pneg_ctxt->CipherCount = cpu_to_le16(1); 796 pneg_ctxt->Ciphers[0] = cipher_type; 797} 798 799static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, 800 __le16 sign_algo) 801{ 802 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; 803 pneg_ctxt->DataLength = 804 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) 805 - sizeof(struct smb2_neg_context)); 806 pneg_ctxt->Reserved = cpu_to_le32(0); 807 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); 808 pneg_ctxt->SigningAlgorithms[0] = sign_algo; 809} 810 811static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) 812{ 813 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; 814 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); 815 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ 816 pneg_ctxt->Name[0] = 0x93; 817 pneg_ctxt->Name[1] = 0xAD; 818 pneg_ctxt->Name[2] = 0x25; 819 pneg_ctxt->Name[3] = 0x50; 820 pneg_ctxt->Name[4] = 0x9C; 821 pneg_ctxt->Name[5] = 0xB4; 822 pneg_ctxt->Name[6] = 0x11; 823 pneg_ctxt->Name[7] = 0xE7; 824 pneg_ctxt->Name[8] = 0xB4; 825 pneg_ctxt->Name[9] = 0x23; 826 pneg_ctxt->Name[10] = 0x83; 827 pneg_ctxt->Name[11] = 0xDE; 828 pneg_ctxt->Name[12] = 0x96; 829 pneg_ctxt->Name[13] = 0x8B; 830 pneg_ctxt->Name[14] = 0xCD; 831 pneg_ctxt->Name[15] = 0x7C; 832} 833 834static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, 835 struct smb2_negotiate_rsp *rsp) 836{ 837 char * const pneg_ctxt = (char *)rsp + 838 le32_to_cpu(rsp->NegotiateContextOffset); 839 int neg_ctxt_cnt = 1; 840 int ctxt_size; 841 842 ksmbd_debug(SMB, 843 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 844 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, 845 conn->preauth_info->Preauth_HashId); 846 ctxt_size = sizeof(struct smb2_preauth_neg_context); 847 848 if (conn->cipher_type) { 849 /* Round to 8 byte boundary */ 850 ctxt_size = round_up(ctxt_size, 8); 851 ksmbd_debug(SMB, 852 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 853 build_encrypt_ctxt((struct smb2_encryption_neg_context *) 854 (pneg_ctxt + ctxt_size), 855 conn->cipher_type); 856 neg_ctxt_cnt++; 857 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; 858 } 859 860 /* compression context not yet supported */ 861 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); 862 863 if (conn->posix_ext_supported) { 864 ctxt_size = round_up(ctxt_size, 8); 865 ksmbd_debug(SMB, 866 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 867 build_posix_ctxt((struct smb2_posix_neg_context *) 868 (pneg_ctxt + ctxt_size)); 869 neg_ctxt_cnt++; 870 ctxt_size += sizeof(struct smb2_posix_neg_context); 871 } 872 873 if (conn->signing_negotiated) { 874 ctxt_size = round_up(ctxt_size, 8); 875 ksmbd_debug(SMB, 876 "assemble SMB2_SIGNING_CAPABILITIES context\n"); 877 build_sign_cap_ctxt((struct smb2_signing_capabilities *) 878 (pneg_ctxt + ctxt_size), 879 conn->signing_algorithm); 880 neg_ctxt_cnt++; 881 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; 882 } 883 884 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); 885 return ctxt_size + AUTH_GSS_PADDING; 886} 887 888static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, 889 struct smb2_preauth_neg_context *pneg_ctxt, 890 int ctxt_len) 891{ 892 /* 893 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, 894 * which may not be present. Only check for used HashAlgorithms[1]. 895 */ 896 if (ctxt_len < 897 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) 898 return STATUS_INVALID_PARAMETER; 899 900 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) 901 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; 902 903 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; 904 return STATUS_SUCCESS; 905} 906 907static void decode_encrypt_ctxt(struct ksmbd_conn *conn, 908 struct smb2_encryption_neg_context *pneg_ctxt, 909 int ctxt_len) 910{ 911 int cph_cnt; 912 int i, cphs_size; 913 914 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { 915 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); 916 return; 917 } 918 919 conn->cipher_type = 0; 920 921 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); 922 cphs_size = cph_cnt * sizeof(__le16); 923 924 if (sizeof(struct smb2_encryption_neg_context) + cphs_size > 925 ctxt_len) { 926 pr_err("Invalid cipher count(%d)\n", cph_cnt); 927 return; 928 } 929 930 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) 931 return; 932 933 for (i = 0; i < cph_cnt; i++) { 934 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || 935 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || 936 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || 937 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { 938 ksmbd_debug(SMB, "Cipher ID = 0x%x\n", 939 pneg_ctxt->Ciphers[i]); 940 conn->cipher_type = pneg_ctxt->Ciphers[i]; 941 break; 942 } 943 } 944} 945 946/** 947 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption 948 * @conn: smb connection 949 * 950 * Return: true if connection should be encrypted, else false 951 */ 952bool smb3_encryption_negotiated(struct ksmbd_conn *conn) 953{ 954 if (!conn->ops->generate_encryptionkey) 955 return false; 956 957 /* 958 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. 959 * SMB 3.1.1 uses the cipher_type field. 960 */ 961 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || 962 conn->cipher_type; 963} 964 965static void decode_compress_ctxt(struct ksmbd_conn *conn, 966 struct smb2_compression_capabilities_context *pneg_ctxt) 967{ 968 conn->compress_algorithm = SMB3_COMPRESS_NONE; 969} 970 971static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, 972 struct smb2_signing_capabilities *pneg_ctxt, 973 int ctxt_len) 974{ 975 int sign_algo_cnt; 976 int i, sign_alos_size; 977 978 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { 979 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); 980 return; 981 } 982 983 conn->signing_negotiated = false; 984 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); 985 sign_alos_size = sign_algo_cnt * sizeof(__le16); 986 987 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > 988 ctxt_len) { 989 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); 990 return; 991 } 992 993 for (i = 0; i < sign_algo_cnt; i++) { 994 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || 995 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { 996 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", 997 pneg_ctxt->SigningAlgorithms[i]); 998 conn->signing_negotiated = true; 999 conn->signing_algorithm = 1000 pneg_ctxt->SigningAlgorithms[i]; 1001 break; 1002 } 1003 } 1004} 1005 1006static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, 1007 struct smb2_negotiate_req *req, 1008 unsigned int len_of_smb) 1009{ 1010 /* +4 is to account for the RFC1001 len field */ 1011 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; 1012 int i = 0, len_of_ctxts; 1013 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); 1014 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); 1015 __le32 status = STATUS_INVALID_PARAMETER; 1016 1017 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); 1018 if (len_of_smb <= offset) { 1019 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); 1020 return status; 1021 } 1022 1023 len_of_ctxts = len_of_smb - offset; 1024 1025 while (i++ < neg_ctxt_cnt) { 1026 int clen, ctxt_len; 1027 1028 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) 1029 break; 1030 1031 pctx = (struct smb2_neg_context *)((char *)pctx + offset); 1032 clen = le16_to_cpu(pctx->DataLength); 1033 ctxt_len = clen + sizeof(struct smb2_neg_context); 1034 1035 if (ctxt_len > len_of_ctxts) 1036 break; 1037 1038 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { 1039 ksmbd_debug(SMB, 1040 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); 1041 if (conn->preauth_info->Preauth_HashId) 1042 break; 1043 1044 status = decode_preauth_ctxt(conn, 1045 (struct smb2_preauth_neg_context *)pctx, 1046 ctxt_len); 1047 if (status != STATUS_SUCCESS) 1048 break; 1049 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { 1050 ksmbd_debug(SMB, 1051 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); 1052 if (conn->cipher_type) 1053 break; 1054 1055 decode_encrypt_ctxt(conn, 1056 (struct smb2_encryption_neg_context *)pctx, 1057 ctxt_len); 1058 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { 1059 ksmbd_debug(SMB, 1060 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); 1061 if (conn->compress_algorithm) 1062 break; 1063 1064 decode_compress_ctxt(conn, 1065 (struct smb2_compression_capabilities_context *)pctx); 1066 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { 1067 ksmbd_debug(SMB, 1068 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); 1069 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { 1070 ksmbd_debug(SMB, 1071 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); 1072 conn->posix_ext_supported = true; 1073 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { 1074 ksmbd_debug(SMB, 1075 "deassemble SMB2_SIGNING_CAPABILITIES context\n"); 1076 1077 decode_sign_cap_ctxt(conn, 1078 (struct smb2_signing_capabilities *)pctx, 1079 ctxt_len); 1080 } 1081 1082 /* offsets must be 8 byte aligned */ 1083 offset = (ctxt_len + 7) & ~0x7; 1084 len_of_ctxts -= offset; 1085 } 1086 return status; 1087} 1088 1089/** 1090 * smb2_handle_negotiate() - handler for smb2 negotiate command 1091 * @work: smb work containing smb request buffer 1092 * 1093 * Return: 0 1094 */ 1095int smb2_handle_negotiate(struct ksmbd_work *work) 1096{ 1097 struct ksmbd_conn *conn = work->conn; 1098 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); 1099 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); 1100 int rc = 0; 1101 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; 1102 __le32 status; 1103 1104 ksmbd_debug(SMB, "Received negotiate request\n"); 1105 conn->need_neg = false; 1106 if (ksmbd_conn_good(conn)) { 1107 pr_err("conn->tcp_status is already in CifsGood State\n"); 1108 work->send_no_response = 1; 1109 return rc; 1110 } 1111 1112 smb2_buf_len = get_rfc1002_len(work->request_buf); 1113 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); 1114 if (smb2_neg_size > smb2_buf_len) { 1115 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1116 rc = -EINVAL; 1117 goto err_out; 1118 } 1119 1120 if (req->DialectCount == 0) { 1121 pr_err("malformed packet\n"); 1122 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1123 rc = -EINVAL; 1124 goto err_out; 1125 } 1126 1127 if (conn->dialect == SMB311_PROT_ID) { 1128 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); 1129 1130 if (smb2_buf_len < nego_ctxt_off) { 1131 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1132 rc = -EINVAL; 1133 goto err_out; 1134 } 1135 1136 if (smb2_neg_size > nego_ctxt_off) { 1137 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1138 rc = -EINVAL; 1139 goto err_out; 1140 } 1141 1142 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1143 nego_ctxt_off) { 1144 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1145 rc = -EINVAL; 1146 goto err_out; 1147 } 1148 } else { 1149 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > 1150 smb2_buf_len) { 1151 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1152 rc = -EINVAL; 1153 goto err_out; 1154 } 1155 } 1156 1157 conn->cli_cap = le32_to_cpu(req->Capabilities); 1158 switch (conn->dialect) { 1159 case SMB311_PROT_ID: 1160 conn->preauth_info = 1161 kzalloc(sizeof(struct preauth_integrity_info), 1162 GFP_KERNEL); 1163 if (!conn->preauth_info) { 1164 rc = -ENOMEM; 1165 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1166 goto err_out; 1167 } 1168 1169 status = deassemble_neg_contexts(conn, req, 1170 get_rfc1002_len(work->request_buf)); 1171 if (status != STATUS_SUCCESS) { 1172 pr_err("deassemble_neg_contexts error(0x%x)\n", 1173 status); 1174 rsp->hdr.Status = status; 1175 rc = -EINVAL; 1176 kfree(conn->preauth_info); 1177 conn->preauth_info = NULL; 1178 goto err_out; 1179 } 1180 1181 rc = init_smb3_11_server(conn); 1182 if (rc < 0) { 1183 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1184 kfree(conn->preauth_info); 1185 conn->preauth_info = NULL; 1186 goto err_out; 1187 } 1188 1189 ksmbd_gen_preauth_integrity_hash(conn, 1190 work->request_buf, 1191 conn->preauth_info->Preauth_HashValue); 1192 rsp->NegotiateContextOffset = 1193 cpu_to_le32(OFFSET_OF_NEG_CONTEXT); 1194 neg_ctxt_len = assemble_neg_contexts(conn, rsp); 1195 break; 1196 case SMB302_PROT_ID: 1197 init_smb3_02_server(conn); 1198 break; 1199 case SMB30_PROT_ID: 1200 init_smb3_0_server(conn); 1201 break; 1202 case SMB21_PROT_ID: 1203 init_smb2_1_server(conn); 1204 break; 1205 case SMB2X_PROT_ID: 1206 case BAD_PROT_ID: 1207 default: 1208 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", 1209 conn->dialect); 1210 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1211 rc = -EINVAL; 1212 goto err_out; 1213 } 1214 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 1215 1216 /* For stats */ 1217 conn->connection_type = conn->dialect; 1218 1219 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); 1220 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); 1221 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); 1222 1223 memcpy(conn->ClientGUID, req->ClientGUID, 1224 SMB2_CLIENT_GUID_SIZE); 1225 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); 1226 1227 rsp->StructureSize = cpu_to_le16(65); 1228 rsp->DialectRevision = cpu_to_le16(conn->dialect); 1229 /* Not setting conn guid rsp->ServerGUID, as it 1230 * not used by client for identifying server 1231 */ 1232 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); 1233 1234 rsp->SystemTime = cpu_to_le64(ksmbd_systime()); 1235 rsp->ServerStartTime = 0; 1236 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", 1237 le32_to_cpu(rsp->NegotiateContextOffset), 1238 le16_to_cpu(rsp->NegotiateContextCount)); 1239 1240 rsp->SecurityBufferOffset = cpu_to_le16(128); 1241 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); 1242 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + 1243 le16_to_cpu(rsp->SecurityBufferOffset)); 1244 1245 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; 1246 conn->use_spnego = true; 1247 1248 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || 1249 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && 1250 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) 1251 conn->sign = true; 1252 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { 1253 server_conf.enforced_signing = true; 1254 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; 1255 conn->sign = true; 1256 } 1257 1258 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); 1259 ksmbd_conn_set_need_negotiate(conn); 1260 1261err_out: 1262 if (rc) 1263 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1264 1265 if (!rc) 1266 rc = ksmbd_iov_pin_rsp(work, rsp, 1267 sizeof(struct smb2_negotiate_rsp) + 1268 AUTH_GSS_LENGTH + neg_ctxt_len); 1269 if (rc < 0) 1270 smb2_set_err_rsp(work); 1271 return rc; 1272} 1273 1274static int alloc_preauth_hash(struct ksmbd_session *sess, 1275 struct ksmbd_conn *conn) 1276{ 1277 if (sess->Preauth_HashValue) 1278 return 0; 1279 1280 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, 1281 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); 1282 if (!sess->Preauth_HashValue) 1283 return -ENOMEM; 1284 1285 return 0; 1286} 1287 1288static int generate_preauth_hash(struct ksmbd_work *work) 1289{ 1290 struct ksmbd_conn *conn = work->conn; 1291 struct ksmbd_session *sess = work->sess; 1292 u8 *preauth_hash; 1293 1294 if (conn->dialect != SMB311_PROT_ID) 1295 return 0; 1296 1297 if (conn->binding) { 1298 struct preauth_session *preauth_sess; 1299 1300 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 1301 if (!preauth_sess) { 1302 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); 1303 if (!preauth_sess) 1304 return -ENOMEM; 1305 } 1306 1307 preauth_hash = preauth_sess->Preauth_HashValue; 1308 } else { 1309 if (!sess->Preauth_HashValue) 1310 if (alloc_preauth_hash(sess, conn)) 1311 return -ENOMEM; 1312 preauth_hash = sess->Preauth_HashValue; 1313 } 1314 1315 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); 1316 return 0; 1317} 1318 1319static int decode_negotiation_token(struct ksmbd_conn *conn, 1320 struct negotiate_message *negblob, 1321 size_t sz) 1322{ 1323 if (!conn->use_spnego) 1324 return -EINVAL; 1325 1326 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { 1327 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { 1328 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; 1329 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; 1330 conn->use_spnego = false; 1331 } 1332 } 1333 return 0; 1334} 1335 1336static int ntlm_negotiate(struct ksmbd_work *work, 1337 struct negotiate_message *negblob, 1338 size_t negblob_len, struct smb2_sess_setup_rsp *rsp) 1339{ 1340 struct challenge_message *chgblob; 1341 unsigned char *spnego_blob = NULL; 1342 u16 spnego_blob_len; 1343 char *neg_blob; 1344 int sz, rc; 1345 1346 ksmbd_debug(SMB, "negotiate phase\n"); 1347 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); 1348 if (rc) 1349 return rc; 1350 1351 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1352 chgblob = 1353 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); 1354 memset(chgblob, 0, sizeof(struct challenge_message)); 1355 1356 if (!work->conn->use_spnego) { 1357 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1358 if (sz < 0) 1359 return -ENOMEM; 1360 1361 rsp->SecurityBufferLength = cpu_to_le16(sz); 1362 return 0; 1363 } 1364 1365 sz = sizeof(struct challenge_message); 1366 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; 1367 1368 neg_blob = kzalloc(sz, GFP_KERNEL); 1369 if (!neg_blob) 1370 return -ENOMEM; 1371 1372 chgblob = (struct challenge_message *)neg_blob; 1373 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); 1374 if (sz < 0) { 1375 rc = -ENOMEM; 1376 goto out; 1377 } 1378 1379 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, 1380 neg_blob, sz); 1381 if (rc) { 1382 rc = -ENOMEM; 1383 goto out; 1384 } 1385 1386 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1387 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1388 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1389 1390out: 1391 kfree(spnego_blob); 1392 kfree(neg_blob); 1393 return rc; 1394} 1395 1396static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, 1397 struct smb2_sess_setup_req *req) 1398{ 1399 int sz; 1400 1401 if (conn->use_spnego && conn->mechToken) 1402 return (struct authenticate_message *)conn->mechToken; 1403 1404 sz = le16_to_cpu(req->SecurityBufferOffset); 1405 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId 1406 + sz); 1407} 1408 1409static struct ksmbd_user *session_user(struct ksmbd_conn *conn, 1410 struct smb2_sess_setup_req *req) 1411{ 1412 struct authenticate_message *authblob; 1413 struct ksmbd_user *user; 1414 char *name; 1415 unsigned int name_off, name_len, secbuf_len; 1416 1417 if (conn->use_spnego && conn->mechToken) 1418 secbuf_len = conn->mechTokenLen; 1419 else 1420 secbuf_len = le16_to_cpu(req->SecurityBufferLength); 1421 if (secbuf_len < sizeof(struct authenticate_message)) { 1422 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); 1423 return NULL; 1424 } 1425 authblob = user_authblob(conn, req); 1426 name_off = le32_to_cpu(authblob->UserName.BufferOffset); 1427 name_len = le16_to_cpu(authblob->UserName.Length); 1428 1429 if (secbuf_len < (u64)name_off + name_len) 1430 return NULL; 1431 1432 name = smb_strndup_from_utf16((const char *)authblob + name_off, 1433 name_len, 1434 true, 1435 conn->local_nls); 1436 if (IS_ERR(name)) { 1437 pr_err("cannot allocate memory\n"); 1438 return NULL; 1439 } 1440 1441 ksmbd_debug(SMB, "session setup request for user %s\n", name); 1442 user = ksmbd_login_user(name); 1443 kfree(name); 1444 return user; 1445} 1446 1447static int ntlm_authenticate(struct ksmbd_work *work, 1448 struct smb2_sess_setup_req *req, 1449 struct smb2_sess_setup_rsp *rsp) 1450{ 1451 struct ksmbd_conn *conn = work->conn; 1452 struct ksmbd_session *sess = work->sess; 1453 struct channel *chann = NULL; 1454 struct ksmbd_user *user; 1455 u64 prev_id; 1456 int sz, rc; 1457 1458 ksmbd_debug(SMB, "authenticate phase\n"); 1459 if (conn->use_spnego) { 1460 unsigned char *spnego_blob; 1461 u16 spnego_blob_len; 1462 1463 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, 1464 &spnego_blob_len, 1465 0); 1466 if (rc) 1467 return -ENOMEM; 1468 1469 sz = le16_to_cpu(rsp->SecurityBufferOffset); 1470 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len); 1471 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); 1472 kfree(spnego_blob); 1473 } 1474 1475 user = session_user(conn, req); 1476 if (!user) { 1477 ksmbd_debug(SMB, "Unknown user name or an error\n"); 1478 return -EPERM; 1479 } 1480 1481 /* Check for previous session */ 1482 prev_id = le64_to_cpu(req->PreviousSessionId); 1483 if (prev_id && prev_id != sess->id) 1484 destroy_previous_session(conn, user, prev_id); 1485 1486 if (sess->state == SMB2_SESSION_VALID) { 1487 /* 1488 * Reuse session if anonymous try to connect 1489 * on reauthetication. 1490 */ 1491 if (conn->binding == false && ksmbd_anonymous_user(user)) { 1492 ksmbd_free_user(user); 1493 return 0; 1494 } 1495 1496 if (!ksmbd_compare_user(sess->user, user)) { 1497 ksmbd_free_user(user); 1498 return -EPERM; 1499 } 1500 ksmbd_free_user(user); 1501 } else { 1502 sess->user = user; 1503 } 1504 1505 if (conn->binding == false && user_guest(sess->user)) { 1506 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; 1507 } else { 1508 struct authenticate_message *authblob; 1509 1510 authblob = user_authblob(conn, req); 1511 if (conn->use_spnego && conn->mechToken) 1512 sz = conn->mechTokenLen; 1513 else 1514 sz = le16_to_cpu(req->SecurityBufferLength); 1515 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); 1516 if (rc) { 1517 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); 1518 ksmbd_debug(SMB, "authentication failed\n"); 1519 return -EPERM; 1520 } 1521 } 1522 1523 /* 1524 * If session state is SMB2_SESSION_VALID, We can assume 1525 * that it is reauthentication. And the user/password 1526 * has been verified, so return it here. 1527 */ 1528 if (sess->state == SMB2_SESSION_VALID) { 1529 if (conn->binding) 1530 goto binding_session; 1531 return 0; 1532 } 1533 1534 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && 1535 (conn->sign || server_conf.enforced_signing)) || 1536 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1537 sess->sign = true; 1538 1539 if (smb3_encryption_negotiated(conn) && 1540 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1541 rc = conn->ops->generate_encryptionkey(conn, sess); 1542 if (rc) { 1543 ksmbd_debug(SMB, 1544 "SMB3 encryption key generation failed\n"); 1545 return -EINVAL; 1546 } 1547 sess->enc = true; 1548 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1549 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1550 /* 1551 * signing is disable if encryption is enable 1552 * on this session 1553 */ 1554 sess->sign = false; 1555 } 1556 1557binding_session: 1558 if (conn->dialect >= SMB30_PROT_ID) { 1559 chann = lookup_chann_list(sess, conn); 1560 if (!chann) { 1561 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1562 if (!chann) 1563 return -ENOMEM; 1564 1565 chann->conn = conn; 1566 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1567 } 1568 } 1569 1570 if (conn->ops->generate_signingkey) { 1571 rc = conn->ops->generate_signingkey(sess, conn); 1572 if (rc) { 1573 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1574 return -EINVAL; 1575 } 1576 } 1577 1578 if (!ksmbd_conn_lookup_dialect(conn)) { 1579 pr_err("fail to verify the dialect\n"); 1580 return -ENOENT; 1581 } 1582 return 0; 1583} 1584 1585#ifdef CONFIG_SMB_SERVER_KERBEROS5 1586static int krb5_authenticate(struct ksmbd_work *work, 1587 struct smb2_sess_setup_req *req, 1588 struct smb2_sess_setup_rsp *rsp) 1589{ 1590 struct ksmbd_conn *conn = work->conn; 1591 struct ksmbd_session *sess = work->sess; 1592 char *in_blob, *out_blob; 1593 struct channel *chann = NULL; 1594 u64 prev_sess_id; 1595 int in_len, out_len; 1596 int retval; 1597 1598 in_blob = (char *)&req->hdr.ProtocolId + 1599 le16_to_cpu(req->SecurityBufferOffset); 1600 in_len = le16_to_cpu(req->SecurityBufferLength); 1601 out_blob = (char *)&rsp->hdr.ProtocolId + 1602 le16_to_cpu(rsp->SecurityBufferOffset); 1603 out_len = work->response_sz - 1604 (le16_to_cpu(rsp->SecurityBufferOffset) + 4); 1605 1606 /* Check previous session */ 1607 prev_sess_id = le64_to_cpu(req->PreviousSessionId); 1608 if (prev_sess_id && prev_sess_id != sess->id) 1609 destroy_previous_session(conn, sess->user, prev_sess_id); 1610 1611 if (sess->state == SMB2_SESSION_VALID) 1612 ksmbd_free_user(sess->user); 1613 1614 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, 1615 out_blob, &out_len); 1616 if (retval) { 1617 ksmbd_debug(SMB, "krb5 authentication failed\n"); 1618 return -EINVAL; 1619 } 1620 rsp->SecurityBufferLength = cpu_to_le16(out_len); 1621 1622 if ((conn->sign || server_conf.enforced_signing) || 1623 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) 1624 sess->sign = true; 1625 1626 if (smb3_encryption_negotiated(conn)) { 1627 retval = conn->ops->generate_encryptionkey(conn, sess); 1628 if (retval) { 1629 ksmbd_debug(SMB, 1630 "SMB3 encryption key generation failed\n"); 1631 return -EINVAL; 1632 } 1633 sess->enc = true; 1634 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) 1635 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; 1636 sess->sign = false; 1637 } 1638 1639 if (conn->dialect >= SMB30_PROT_ID) { 1640 chann = lookup_chann_list(sess, conn); 1641 if (!chann) { 1642 chann = kmalloc(sizeof(struct channel), GFP_KERNEL); 1643 if (!chann) 1644 return -ENOMEM; 1645 1646 chann->conn = conn; 1647 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); 1648 } 1649 } 1650 1651 if (conn->ops->generate_signingkey) { 1652 retval = conn->ops->generate_signingkey(sess, conn); 1653 if (retval) { 1654 ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); 1655 return -EINVAL; 1656 } 1657 } 1658 1659 if (!ksmbd_conn_lookup_dialect(conn)) { 1660 pr_err("fail to verify the dialect\n"); 1661 return -ENOENT; 1662 } 1663 return 0; 1664} 1665#else 1666static int krb5_authenticate(struct ksmbd_work *work, 1667 struct smb2_sess_setup_req *req, 1668 struct smb2_sess_setup_rsp *rsp) 1669{ 1670 return -EOPNOTSUPP; 1671} 1672#endif 1673 1674int smb2_sess_setup(struct ksmbd_work *work) 1675{ 1676 struct ksmbd_conn *conn = work->conn; 1677 struct smb2_sess_setup_req *req; 1678 struct smb2_sess_setup_rsp *rsp; 1679 struct ksmbd_session *sess; 1680 struct negotiate_message *negblob; 1681 unsigned int negblob_len, negblob_off; 1682 int rc = 0; 1683 1684 ksmbd_debug(SMB, "Received request for session setup\n"); 1685 1686 WORK_BUFFERS(work, req, rsp); 1687 1688 rsp->StructureSize = cpu_to_le16(9); 1689 rsp->SessionFlags = 0; 1690 rsp->SecurityBufferOffset = cpu_to_le16(72); 1691 rsp->SecurityBufferLength = 0; 1692 1693 ksmbd_conn_lock(conn); 1694 if (!req->hdr.SessionId) { 1695 sess = ksmbd_smb2_session_create(); 1696 if (!sess) { 1697 rc = -ENOMEM; 1698 goto out_err; 1699 } 1700 rsp->hdr.SessionId = cpu_to_le64(sess->id); 1701 rc = ksmbd_session_register(conn, sess); 1702 if (rc) 1703 goto out_err; 1704 } else if (conn->dialect >= SMB30_PROT_ID && 1705 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1706 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { 1707 u64 sess_id = le64_to_cpu(req->hdr.SessionId); 1708 1709 sess = ksmbd_session_lookup_slowpath(sess_id); 1710 if (!sess) { 1711 rc = -ENOENT; 1712 goto out_err; 1713 } 1714 1715 if (conn->dialect != sess->dialect) { 1716 rc = -EINVAL; 1717 goto out_err; 1718 } 1719 1720 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { 1721 rc = -EINVAL; 1722 goto out_err; 1723 } 1724 1725 if (strncmp(conn->ClientGUID, sess->ClientGUID, 1726 SMB2_CLIENT_GUID_SIZE)) { 1727 rc = -ENOENT; 1728 goto out_err; 1729 } 1730 1731 if (sess->state == SMB2_SESSION_IN_PROGRESS) { 1732 rc = -EACCES; 1733 goto out_err; 1734 } 1735 1736 if (sess->state == SMB2_SESSION_EXPIRED) { 1737 rc = -EFAULT; 1738 goto out_err; 1739 } 1740 1741 if (ksmbd_conn_need_reconnect(conn)) { 1742 rc = -EFAULT; 1743 sess = NULL; 1744 goto out_err; 1745 } 1746 1747 if (ksmbd_session_lookup(conn, sess_id)) { 1748 rc = -EACCES; 1749 goto out_err; 1750 } 1751 1752 if (user_guest(sess->user)) { 1753 rc = -EOPNOTSUPP; 1754 goto out_err; 1755 } 1756 1757 conn->binding = true; 1758 } else if ((conn->dialect < SMB30_PROT_ID || 1759 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && 1760 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { 1761 sess = NULL; 1762 rc = -EACCES; 1763 goto out_err; 1764 } else { 1765 sess = ksmbd_session_lookup(conn, 1766 le64_to_cpu(req->hdr.SessionId)); 1767 if (!sess) { 1768 rc = -ENOENT; 1769 goto out_err; 1770 } 1771 1772 if (sess->state == SMB2_SESSION_EXPIRED) { 1773 rc = -EFAULT; 1774 goto out_err; 1775 } 1776 1777 if (ksmbd_conn_need_reconnect(conn)) { 1778 rc = -EFAULT; 1779 sess = NULL; 1780 goto out_err; 1781 } 1782 } 1783 work->sess = sess; 1784 1785 negblob_off = le16_to_cpu(req->SecurityBufferOffset); 1786 negblob_len = le16_to_cpu(req->SecurityBufferLength); 1787 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { 1788 rc = -EINVAL; 1789 goto out_err; 1790 } 1791 1792 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + 1793 negblob_off); 1794 1795 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { 1796 if (conn->mechToken) { 1797 negblob = (struct negotiate_message *)conn->mechToken; 1798 negblob_len = conn->mechTokenLen; 1799 } 1800 } 1801 1802 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { 1803 rc = -EINVAL; 1804 goto out_err; 1805 } 1806 1807 if (server_conf.auth_mechs & conn->auth_mechs) { 1808 rc = generate_preauth_hash(work); 1809 if (rc) 1810 goto out_err; 1811 1812 if (conn->preferred_auth_mech & 1813 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { 1814 rc = krb5_authenticate(work, req, rsp); 1815 if (rc) { 1816 rc = -EINVAL; 1817 goto out_err; 1818 } 1819 1820 if (!ksmbd_conn_need_reconnect(conn)) { 1821 ksmbd_conn_set_good(conn); 1822 sess->state = SMB2_SESSION_VALID; 1823 } 1824 kfree(sess->Preauth_HashValue); 1825 sess->Preauth_HashValue = NULL; 1826 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { 1827 if (negblob->MessageType == NtLmNegotiate) { 1828 rc = ntlm_negotiate(work, negblob, negblob_len, rsp); 1829 if (rc) 1830 goto out_err; 1831 rsp->hdr.Status = 1832 STATUS_MORE_PROCESSING_REQUIRED; 1833 } else if (negblob->MessageType == NtLmAuthenticate) { 1834 rc = ntlm_authenticate(work, req, rsp); 1835 if (rc) 1836 goto out_err; 1837 1838 if (!ksmbd_conn_need_reconnect(conn)) { 1839 ksmbd_conn_set_good(conn); 1840 sess->state = SMB2_SESSION_VALID; 1841 } 1842 if (conn->binding) { 1843 struct preauth_session *preauth_sess; 1844 1845 preauth_sess = 1846 ksmbd_preauth_session_lookup(conn, sess->id); 1847 if (preauth_sess) { 1848 list_del(&preauth_sess->preauth_entry); 1849 kfree(preauth_sess); 1850 } 1851 } 1852 kfree(sess->Preauth_HashValue); 1853 sess->Preauth_HashValue = NULL; 1854 } else { 1855 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", 1856 le32_to_cpu(negblob->MessageType)); 1857 rc = -EINVAL; 1858 } 1859 } else { 1860 /* TODO: need one more negotiation */ 1861 pr_err("Not support the preferred authentication\n"); 1862 rc = -EINVAL; 1863 } 1864 } else { 1865 pr_err("Not support authentication\n"); 1866 rc = -EINVAL; 1867 } 1868 1869out_err: 1870 if (rc == -EINVAL) 1871 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 1872 else if (rc == -ENOENT) 1873 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 1874 else if (rc == -EACCES) 1875 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 1876 else if (rc == -EFAULT) 1877 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; 1878 else if (rc == -ENOMEM) 1879 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1880 else if (rc == -EOPNOTSUPP) 1881 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 1882 else if (rc) 1883 rsp->hdr.Status = STATUS_LOGON_FAILURE; 1884 1885 if (conn->use_spnego && conn->mechToken) { 1886 kfree(conn->mechToken); 1887 conn->mechToken = NULL; 1888 } 1889 1890 if (rc < 0) { 1891 /* 1892 * SecurityBufferOffset should be set to zero 1893 * in session setup error response. 1894 */ 1895 rsp->SecurityBufferOffset = 0; 1896 1897 if (sess) { 1898 bool try_delay = false; 1899 1900 /* 1901 * To avoid dictionary attacks (repeated session setups rapidly sent) to 1902 * connect to server, ksmbd make a delay of a 5 seconds on session setup 1903 * failure to make it harder to send enough random connection requests 1904 * to break into a server. 1905 */ 1906 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) 1907 try_delay = true; 1908 1909 sess->last_active = jiffies; 1910 sess->state = SMB2_SESSION_EXPIRED; 1911 if (try_delay) { 1912 ksmbd_conn_set_need_reconnect(conn); 1913 ssleep(5); 1914 ksmbd_conn_set_need_negotiate(conn); 1915 } 1916 } 1917 smb2_set_err_rsp(work); 1918 } else { 1919 unsigned int iov_len; 1920 1921 if (rsp->SecurityBufferLength) 1922 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + 1923 le16_to_cpu(rsp->SecurityBufferLength); 1924 else 1925 iov_len = sizeof(struct smb2_sess_setup_rsp); 1926 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); 1927 if (rc) 1928 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 1929 } 1930 1931 ksmbd_conn_unlock(conn); 1932 return rc; 1933} 1934 1935/** 1936 * smb2_tree_connect() - handler for smb2 tree connect command 1937 * @work: smb work containing smb request buffer 1938 * 1939 * Return: 0 on success, otherwise error 1940 */ 1941int smb2_tree_connect(struct ksmbd_work *work) 1942{ 1943 struct ksmbd_conn *conn = work->conn; 1944 struct smb2_tree_connect_req *req; 1945 struct smb2_tree_connect_rsp *rsp; 1946 struct ksmbd_session *sess = work->sess; 1947 char *treename = NULL, *name = NULL; 1948 struct ksmbd_tree_conn_status status; 1949 struct ksmbd_share_config *share; 1950 int rc = -EINVAL; 1951 1952 WORK_BUFFERS(work, req, rsp); 1953 1954 treename = smb_strndup_from_utf16(req->Buffer, 1955 le16_to_cpu(req->PathLength), true, 1956 conn->local_nls); 1957 if (IS_ERR(treename)) { 1958 pr_err("treename is NULL\n"); 1959 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1960 goto out_err1; 1961 } 1962 1963 name = ksmbd_extract_sharename(conn->um, treename); 1964 if (IS_ERR(name)) { 1965 status.ret = KSMBD_TREE_CONN_STATUS_ERROR; 1966 goto out_err1; 1967 } 1968 1969 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", 1970 name, treename); 1971 1972 status = ksmbd_tree_conn_connect(conn, sess, name); 1973 if (status.ret == KSMBD_TREE_CONN_STATUS_OK) 1974 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); 1975 else 1976 goto out_err1; 1977 1978 share = status.tree_conn->share_conf; 1979 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 1980 ksmbd_debug(SMB, "IPC share path request\n"); 1981 rsp->ShareType = SMB2_SHARE_TYPE_PIPE; 1982 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1983 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | 1984 FILE_DELETE_LE | FILE_READ_CONTROL_LE | 1985 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1986 FILE_SYNCHRONIZE_LE; 1987 } else { 1988 rsp->ShareType = SMB2_SHARE_TYPE_DISK; 1989 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | 1990 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; 1991 if (test_tree_conn_flag(status.tree_conn, 1992 KSMBD_TREE_CONN_FLAG_WRITABLE)) { 1993 rsp->MaximalAccess |= FILE_WRITE_DATA_LE | 1994 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | 1995 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | 1996 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | 1997 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | 1998 FILE_SYNCHRONIZE_LE; 1999 } 2000 } 2001 2002 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); 2003 if (conn->posix_ext_supported) 2004 status.tree_conn->posix_extensions = true; 2005 2006 write_lock(&sess->tree_conns_lock); 2007 status.tree_conn->t_state = TREE_CONNECTED; 2008 write_unlock(&sess->tree_conns_lock); 2009 rsp->StructureSize = cpu_to_le16(16); 2010out_err1: 2011 rsp->Capabilities = 0; 2012 rsp->Reserved = 0; 2013 /* default manual caching */ 2014 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; 2015 2016 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); 2017 if (rc) 2018 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; 2019 2020 if (!IS_ERR(treename)) 2021 kfree(treename); 2022 if (!IS_ERR(name)) 2023 kfree(name); 2024 2025 switch (status.ret) { 2026 case KSMBD_TREE_CONN_STATUS_OK: 2027 rsp->hdr.Status = STATUS_SUCCESS; 2028 rc = 0; 2029 break; 2030 case -ESTALE: 2031 case -ENOENT: 2032 case KSMBD_TREE_CONN_STATUS_NO_SHARE: 2033 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; 2034 break; 2035 case -ENOMEM: 2036 case KSMBD_TREE_CONN_STATUS_NOMEM: 2037 rsp->hdr.Status = STATUS_NO_MEMORY; 2038 break; 2039 case KSMBD_TREE_CONN_STATUS_ERROR: 2040 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: 2041 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: 2042 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2043 break; 2044 case -EINVAL: 2045 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2046 break; 2047 default: 2048 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2049 } 2050 2051 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 2052 smb2_set_err_rsp(work); 2053 2054 return rc; 2055} 2056 2057/** 2058 * smb2_create_open_flags() - convert smb open flags to unix open flags 2059 * @file_present: is file already present 2060 * @access: file access flags 2061 * @disposition: file disposition flags 2062 * @may_flags: set with MAY_ flags 2063 * 2064 * Return: file open flags 2065 */ 2066static int smb2_create_open_flags(bool file_present, __le32 access, 2067 __le32 disposition, 2068 int *may_flags) 2069{ 2070 int oflags = O_NONBLOCK | O_LARGEFILE; 2071 2072 if (access & FILE_READ_DESIRED_ACCESS_LE && 2073 access & FILE_WRITE_DESIRE_ACCESS_LE) { 2074 oflags |= O_RDWR; 2075 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; 2076 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { 2077 oflags |= O_WRONLY; 2078 *may_flags = MAY_OPEN | MAY_WRITE; 2079 } else { 2080 oflags |= O_RDONLY; 2081 *may_flags = MAY_OPEN | MAY_READ; 2082 } 2083 2084 if (access == FILE_READ_ATTRIBUTES_LE) 2085 oflags |= O_PATH; 2086 2087 if (file_present) { 2088 switch (disposition & FILE_CREATE_MASK_LE) { 2089 case FILE_OPEN_LE: 2090 case FILE_CREATE_LE: 2091 break; 2092 case FILE_SUPERSEDE_LE: 2093 case FILE_OVERWRITE_LE: 2094 case FILE_OVERWRITE_IF_LE: 2095 oflags |= O_TRUNC; 2096 break; 2097 default: 2098 break; 2099 } 2100 } else { 2101 switch (disposition & FILE_CREATE_MASK_LE) { 2102 case FILE_SUPERSEDE_LE: 2103 case FILE_CREATE_LE: 2104 case FILE_OPEN_IF_LE: 2105 case FILE_OVERWRITE_IF_LE: 2106 oflags |= O_CREAT; 2107 break; 2108 case FILE_OPEN_LE: 2109 case FILE_OVERWRITE_LE: 2110 oflags &= ~O_CREAT; 2111 break; 2112 default: 2113 break; 2114 } 2115 } 2116 2117 return oflags; 2118} 2119 2120/** 2121 * smb2_tree_disconnect() - handler for smb tree connect request 2122 * @work: smb work containing request buffer 2123 * 2124 * Return: 0 2125 */ 2126int smb2_tree_disconnect(struct ksmbd_work *work) 2127{ 2128 struct smb2_tree_disconnect_rsp *rsp; 2129 struct smb2_tree_disconnect_req *req; 2130 struct ksmbd_session *sess = work->sess; 2131 struct ksmbd_tree_connect *tcon = work->tcon; 2132 int err; 2133 2134 WORK_BUFFERS(work, req, rsp); 2135 2136 ksmbd_debug(SMB, "request\n"); 2137 2138 if (!tcon) { 2139 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2140 2141 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2142 err = -ENOENT; 2143 goto err_out; 2144 } 2145 2146 ksmbd_close_tree_conn_fds(work); 2147 2148 write_lock(&sess->tree_conns_lock); 2149 if (tcon->t_state == TREE_DISCONNECTED) { 2150 write_unlock(&sess->tree_conns_lock); 2151 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2152 err = -ENOENT; 2153 goto err_out; 2154 } 2155 2156 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount)); 2157 tcon->t_state = TREE_DISCONNECTED; 2158 write_unlock(&sess->tree_conns_lock); 2159 2160 err = ksmbd_tree_conn_disconnect(sess, tcon); 2161 if (err) { 2162 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2163 goto err_out; 2164 } 2165 2166 work->tcon = NULL; 2167 2168 rsp->StructureSize = cpu_to_le16(4); 2169 err = ksmbd_iov_pin_rsp(work, rsp, 2170 sizeof(struct smb2_tree_disconnect_rsp)); 2171 if (err) { 2172 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2173 goto err_out; 2174 } 2175 2176 return 0; 2177 2178err_out: 2179 smb2_set_err_rsp(work); 2180 return err; 2181 2182} 2183 2184/** 2185 * smb2_session_logoff() - handler for session log off request 2186 * @work: smb work containing request buffer 2187 * 2188 * Return: 0 2189 */ 2190int smb2_session_logoff(struct ksmbd_work *work) 2191{ 2192 struct ksmbd_conn *conn = work->conn; 2193 struct smb2_logoff_req *req; 2194 struct smb2_logoff_rsp *rsp; 2195 struct ksmbd_session *sess; 2196 u64 sess_id; 2197 int err; 2198 2199 WORK_BUFFERS(work, req, rsp); 2200 2201 ksmbd_debug(SMB, "request\n"); 2202 2203 ksmbd_conn_lock(conn); 2204 if (!ksmbd_conn_good(conn)) { 2205 ksmbd_conn_unlock(conn); 2206 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2207 smb2_set_err_rsp(work); 2208 return -ENOENT; 2209 } 2210 sess_id = le64_to_cpu(req->hdr.SessionId); 2211 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); 2212 ksmbd_conn_unlock(conn); 2213 2214 ksmbd_close_session_fds(work); 2215 ksmbd_conn_wait_idle(conn, sess_id); 2216 2217 /* 2218 * Re-lookup session to validate if session is deleted 2219 * while waiting request complete 2220 */ 2221 sess = ksmbd_session_lookup_all(conn, sess_id); 2222 if (ksmbd_tree_conn_session_logoff(sess)) { 2223 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); 2224 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; 2225 smb2_set_err_rsp(work); 2226 return -ENOENT; 2227 } 2228 2229 ksmbd_destroy_file_table(&sess->file_table); 2230 sess->state = SMB2_SESSION_EXPIRED; 2231 2232 ksmbd_free_user(sess->user); 2233 sess->user = NULL; 2234 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); 2235 2236 rsp->StructureSize = cpu_to_le16(4); 2237 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); 2238 if (err) { 2239 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 2240 smb2_set_err_rsp(work); 2241 return err; 2242 } 2243 return 0; 2244} 2245 2246/** 2247 * create_smb2_pipe() - create IPC pipe 2248 * @work: smb work containing request buffer 2249 * 2250 * Return: 0 on success, otherwise error 2251 */ 2252static noinline int create_smb2_pipe(struct ksmbd_work *work) 2253{ 2254 struct smb2_create_rsp *rsp; 2255 struct smb2_create_req *req; 2256 int id; 2257 int err; 2258 char *name; 2259 2260 WORK_BUFFERS(work, req, rsp); 2261 2262 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 2263 1, work->conn->local_nls); 2264 if (IS_ERR(name)) { 2265 rsp->hdr.Status = STATUS_NO_MEMORY; 2266 err = PTR_ERR(name); 2267 goto out; 2268 } 2269 2270 id = ksmbd_session_rpc_open(work->sess, name); 2271 if (id < 0) { 2272 pr_err("Unable to open RPC pipe: %d\n", id); 2273 err = id; 2274 goto out; 2275 } 2276 2277 rsp->hdr.Status = STATUS_SUCCESS; 2278 rsp->StructureSize = cpu_to_le16(89); 2279 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; 2280 rsp->Flags = 0; 2281 rsp->CreateAction = cpu_to_le32(FILE_OPENED); 2282 2283 rsp->CreationTime = cpu_to_le64(0); 2284 rsp->LastAccessTime = cpu_to_le64(0); 2285 rsp->ChangeTime = cpu_to_le64(0); 2286 rsp->AllocationSize = cpu_to_le64(0); 2287 rsp->EndofFile = cpu_to_le64(0); 2288 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; 2289 rsp->Reserved2 = 0; 2290 rsp->VolatileFileId = id; 2291 rsp->PersistentFileId = 0; 2292 rsp->CreateContextsOffset = 0; 2293 rsp->CreateContextsLength = 0; 2294 2295 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); 2296 if (err) 2297 goto out; 2298 2299 kfree(name); 2300 return 0; 2301 2302out: 2303 switch (err) { 2304 case -EINVAL: 2305 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2306 break; 2307 case -ENOSPC: 2308 case -ENOMEM: 2309 rsp->hdr.Status = STATUS_NO_MEMORY; 2310 break; 2311 } 2312 2313 if (!IS_ERR(name)) 2314 kfree(name); 2315 2316 smb2_set_err_rsp(work); 2317 return err; 2318} 2319 2320/** 2321 * smb2_set_ea() - handler for setting extended attributes using set 2322 * info command 2323 * @eabuf: set info command buffer 2324 * @buf_len: set info command buffer length 2325 * @path: dentry path for get ea 2326 * @get_write: get write access to a mount 2327 * 2328 * Return: 0 on success, otherwise error 2329 */ 2330static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, 2331 const struct path *path, bool get_write) 2332{ 2333 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2334 char *attr_name = NULL, *value; 2335 int rc = 0; 2336 unsigned int next = 0; 2337 2338 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2339 le16_to_cpu(eabuf->EaValueLength)) 2340 return -EINVAL; 2341 2342 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); 2343 if (!attr_name) 2344 return -ENOMEM; 2345 2346 do { 2347 if (!eabuf->EaNameLength) 2348 goto next; 2349 2350 ksmbd_debug(SMB, 2351 "name : <%s>, name_len : %u, value_len : %u, next : %u\n", 2352 eabuf->name, eabuf->EaNameLength, 2353 le16_to_cpu(eabuf->EaValueLength), 2354 le32_to_cpu(eabuf->NextEntryOffset)); 2355 2356 if (eabuf->EaNameLength > 2357 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { 2358 rc = -EINVAL; 2359 break; 2360 } 2361 2362 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); 2363 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, 2364 eabuf->EaNameLength); 2365 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; 2366 value = (char *)&eabuf->name + eabuf->EaNameLength + 1; 2367 2368 if (!eabuf->EaValueLength) { 2369 rc = ksmbd_vfs_casexattr_len(idmap, 2370 path->dentry, 2371 attr_name, 2372 XATTR_USER_PREFIX_LEN + 2373 eabuf->EaNameLength); 2374 2375 /* delete the EA only when it exits */ 2376 if (rc > 0) { 2377 rc = ksmbd_vfs_remove_xattr(idmap, 2378 path, 2379 attr_name); 2380 2381 if (rc < 0) { 2382 ksmbd_debug(SMB, 2383 "remove xattr failed(%d)\n", 2384 rc); 2385 break; 2386 } 2387 } 2388 2389 /* if the EA doesn't exist, just do nothing. */ 2390 rc = 0; 2391 } else { 2392 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, 2393 le16_to_cpu(eabuf->EaValueLength), 2394 0, true); 2395 if (rc < 0) { 2396 ksmbd_debug(SMB, 2397 "ksmbd_vfs_setxattr is failed(%d)\n", 2398 rc); 2399 break; 2400 } 2401 } 2402 2403next: 2404 next = le32_to_cpu(eabuf->NextEntryOffset); 2405 if (next == 0 || buf_len < next) 2406 break; 2407 buf_len -= next; 2408 eabuf = (struct smb2_ea_info *)((char *)eabuf + next); 2409 if (buf_len < sizeof(struct smb2_ea_info)) { 2410 rc = -EINVAL; 2411 break; 2412 } 2413 2414 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 2415 le16_to_cpu(eabuf->EaValueLength)) { 2416 rc = -EINVAL; 2417 break; 2418 } 2419 } while (next != 0); 2420 2421 kfree(attr_name); 2422 return rc; 2423} 2424 2425static noinline int smb2_set_stream_name_xattr(const struct path *path, 2426 struct ksmbd_file *fp, 2427 char *stream_name, int s_type) 2428{ 2429 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2430 size_t xattr_stream_size; 2431 char *xattr_stream_name; 2432 int rc; 2433 2434 rc = ksmbd_vfs_xattr_stream_name(stream_name, 2435 &xattr_stream_name, 2436 &xattr_stream_size, 2437 s_type); 2438 if (rc) 2439 return rc; 2440 2441 fp->stream.name = xattr_stream_name; 2442 fp->stream.size = xattr_stream_size; 2443 2444 /* Check if there is stream prefix in xattr space */ 2445 rc = ksmbd_vfs_casexattr_len(idmap, 2446 path->dentry, 2447 xattr_stream_name, 2448 xattr_stream_size); 2449 if (rc >= 0) 2450 return 0; 2451 2452 if (fp->cdoption == FILE_OPEN_LE) { 2453 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); 2454 return -EBADF; 2455 } 2456 2457 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); 2458 if (rc < 0) 2459 pr_err("Failed to store XATTR stream name :%d\n", rc); 2460 return 0; 2461} 2462 2463static int smb2_remove_smb_xattrs(const struct path *path) 2464{ 2465 struct mnt_idmap *idmap = mnt_idmap(path->mnt); 2466 char *name, *xattr_list = NULL; 2467 ssize_t xattr_list_len; 2468 int err = 0; 2469 2470 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 2471 if (xattr_list_len < 0) { 2472 goto out; 2473 } else if (!xattr_list_len) { 2474 ksmbd_debug(SMB, "empty xattr in the file\n"); 2475 goto out; 2476 } 2477 2478 for (name = xattr_list; name - xattr_list < xattr_list_len; 2479 name += strlen(name) + 1) { 2480 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); 2481 2482 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && 2483 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 2484 STREAM_PREFIX_LEN)) { 2485 err = ksmbd_vfs_remove_xattr(idmap, path, 2486 name); 2487 if (err) 2488 ksmbd_debug(SMB, "remove xattr failed : %s\n", 2489 name); 2490 } 2491 } 2492out: 2493 kvfree(xattr_list); 2494 return err; 2495} 2496 2497static int smb2_create_truncate(const struct path *path) 2498{ 2499 int rc = vfs_truncate(path, 0); 2500 2501 if (rc) { 2502 pr_err("vfs_truncate failed, rc %d\n", rc); 2503 return rc; 2504 } 2505 2506 rc = smb2_remove_smb_xattrs(path); 2507 if (rc == -EOPNOTSUPP) 2508 rc = 0; 2509 if (rc) 2510 ksmbd_debug(SMB, 2511 "ksmbd_truncate_stream_name_xattr failed, rc %d\n", 2512 rc); 2513 return rc; 2514} 2515 2516static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, 2517 struct ksmbd_file *fp) 2518{ 2519 struct xattr_dos_attrib da = {0}; 2520 int rc; 2521 2522 if (!test_share_config_flag(tcon->share_conf, 2523 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2524 return; 2525 2526 da.version = 4; 2527 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 2528 da.itime = da.create_time = fp->create_time; 2529 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 2530 XATTR_DOSINFO_ITIME; 2531 2532 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); 2533 if (rc) 2534 ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); 2535} 2536 2537static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, 2538 const struct path *path, struct ksmbd_file *fp) 2539{ 2540 struct xattr_dos_attrib da; 2541 int rc; 2542 2543 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); 2544 2545 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ 2546 if (!test_share_config_flag(tcon->share_conf, 2547 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) 2548 return; 2549 2550 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), 2551 path->dentry, &da); 2552 if (rc > 0) { 2553 fp->f_ci->m_fattr = cpu_to_le32(da.attr); 2554 fp->create_time = da.create_time; 2555 fp->itime = da.itime; 2556 } 2557} 2558 2559static int smb2_creat(struct ksmbd_work *work, struct path *parent_path, 2560 struct path *path, char *name, int open_flags, 2561 umode_t posix_mode, bool is_dir) 2562{ 2563 struct ksmbd_tree_connect *tcon = work->tcon; 2564 struct ksmbd_share_config *share = tcon->share_conf; 2565 umode_t mode; 2566 int rc; 2567 2568 if (!(open_flags & O_CREAT)) 2569 return -EBADF; 2570 2571 ksmbd_debug(SMB, "file does not exist, so creating\n"); 2572 if (is_dir == true) { 2573 ksmbd_debug(SMB, "creating directory\n"); 2574 2575 mode = share_config_directory_mode(share, posix_mode); 2576 rc = ksmbd_vfs_mkdir(work, name, mode); 2577 if (rc) 2578 return rc; 2579 } else { 2580 ksmbd_debug(SMB, "creating regular file\n"); 2581 2582 mode = share_config_create_mode(share, posix_mode); 2583 rc = ksmbd_vfs_create(work, name, mode); 2584 if (rc) 2585 return rc; 2586 } 2587 2588 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0); 2589 if (rc) { 2590 pr_err("cannot get linux path (%s), err = %d\n", 2591 name, rc); 2592 return rc; 2593 } 2594 return 0; 2595} 2596 2597static int smb2_create_sd_buffer(struct ksmbd_work *work, 2598 struct smb2_create_req *req, 2599 const struct path *path) 2600{ 2601 struct create_context *context; 2602 struct create_sd_buf_req *sd_buf; 2603 2604 if (!req->CreateContextsOffset) 2605 return -ENOENT; 2606 2607 /* Parse SD BUFFER create contexts */ 2608 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); 2609 if (!context) 2610 return -ENOENT; 2611 else if (IS_ERR(context)) 2612 return PTR_ERR(context); 2613 2614 ksmbd_debug(SMB, 2615 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); 2616 sd_buf = (struct create_sd_buf_req *)context; 2617 if (le16_to_cpu(context->DataOffset) + 2618 le32_to_cpu(context->DataLength) < 2619 sizeof(struct create_sd_buf_req)) 2620 return -EINVAL; 2621 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, 2622 le32_to_cpu(sd_buf->ccontext.DataLength), true, false); 2623} 2624 2625static void ksmbd_acls_fattr(struct smb_fattr *fattr, 2626 struct mnt_idmap *idmap, 2627 struct inode *inode) 2628{ 2629 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 2630 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 2631 2632 fattr->cf_uid = vfsuid_into_kuid(vfsuid); 2633 fattr->cf_gid = vfsgid_into_kgid(vfsgid); 2634 fattr->cf_mode = inode->i_mode; 2635 fattr->cf_acls = NULL; 2636 fattr->cf_dacls = NULL; 2637 2638 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { 2639 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); 2640 if (S_ISDIR(inode->i_mode)) 2641 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); 2642 } 2643} 2644 2645/** 2646 * smb2_open() - handler for smb file open request 2647 * @work: smb work containing request buffer 2648 * 2649 * Return: 0 on success, otherwise error 2650 */ 2651int smb2_open(struct ksmbd_work *work) 2652{ 2653 struct ksmbd_conn *conn = work->conn; 2654 struct ksmbd_session *sess = work->sess; 2655 struct ksmbd_tree_connect *tcon = work->tcon; 2656 struct smb2_create_req *req; 2657 struct smb2_create_rsp *rsp; 2658 struct path path, parent_path; 2659 struct ksmbd_share_config *share = tcon->share_conf; 2660 struct ksmbd_file *fp = NULL; 2661 struct file *filp = NULL; 2662 struct mnt_idmap *idmap = NULL; 2663 struct kstat stat; 2664 struct create_context *context; 2665 struct lease_ctx_info *lc = NULL; 2666 struct create_ea_buf_req *ea_buf = NULL; 2667 struct oplock_info *opinfo; 2668 __le32 *next_ptr = NULL; 2669 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; 2670 int rc = 0; 2671 int contxt_cnt = 0, query_disk_id = 0; 2672 int maximal_access_ctxt = 0, posix_ctxt = 0; 2673 int s_type = 0; 2674 int next_off = 0; 2675 char *name = NULL; 2676 char *stream_name = NULL; 2677 bool file_present = false, created = false, already_permitted = false; 2678 int share_ret, need_truncate = 0; 2679 u64 time; 2680 umode_t posix_mode = 0; 2681 __le32 daccess, maximal_access = 0; 2682 int iov_len = 0; 2683 2684 WORK_BUFFERS(work, req, rsp); 2685 2686 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && 2687 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { 2688 ksmbd_debug(SMB, "invalid flag in chained command\n"); 2689 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 2690 smb2_set_err_rsp(work); 2691 return -EINVAL; 2692 } 2693 2694 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { 2695 ksmbd_debug(SMB, "IPC pipe create request\n"); 2696 return create_smb2_pipe(work); 2697 } 2698 2699 if (req->NameLength) { 2700 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2701 *(char *)req->Buffer == '\\') { 2702 pr_err("not allow directory name included leading slash\n"); 2703 rc = -EINVAL; 2704 goto err_out2; 2705 } 2706 2707 name = smb2_get_name(req->Buffer, 2708 le16_to_cpu(req->NameLength), 2709 work->conn->local_nls); 2710 if (IS_ERR(name)) { 2711 rc = PTR_ERR(name); 2712 if (rc != -ENOMEM) 2713 rc = -ENOENT; 2714 name = NULL; 2715 goto err_out2; 2716 } 2717 2718 ksmbd_debug(SMB, "converted name = %s\n", name); 2719 if (strchr(name, ':')) { 2720 if (!test_share_config_flag(work->tcon->share_conf, 2721 KSMBD_SHARE_FLAG_STREAMS)) { 2722 rc = -EBADF; 2723 goto err_out2; 2724 } 2725 rc = parse_stream_name(name, &stream_name, &s_type); 2726 if (rc < 0) 2727 goto err_out2; 2728 } 2729 2730 rc = ksmbd_validate_filename(name); 2731 if (rc < 0) 2732 goto err_out2; 2733 2734 if (ksmbd_share_veto_filename(share, name)) { 2735 rc = -ENOENT; 2736 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", 2737 name); 2738 goto err_out2; 2739 } 2740 } else { 2741 name = kstrdup("", GFP_KERNEL); 2742 if (!name) { 2743 rc = -ENOMEM; 2744 goto err_out2; 2745 } 2746 } 2747 2748 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { 2749 pr_err("Invalid impersonationlevel : 0x%x\n", 2750 le32_to_cpu(req->ImpersonationLevel)); 2751 rc = -EIO; 2752 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; 2753 goto err_out2; 2754 } 2755 2756 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { 2757 pr_err("Invalid create options : 0x%x\n", 2758 le32_to_cpu(req->CreateOptions)); 2759 rc = -EINVAL; 2760 goto err_out2; 2761 } else { 2762 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && 2763 req->CreateOptions & FILE_RANDOM_ACCESS_LE) 2764 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); 2765 2766 if (req->CreateOptions & 2767 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | 2768 FILE_RESERVE_OPFILTER_LE)) { 2769 rc = -EOPNOTSUPP; 2770 goto err_out2; 2771 } 2772 2773 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2774 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { 2775 rc = -EINVAL; 2776 goto err_out2; 2777 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { 2778 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); 2779 } 2780 } 2781 } 2782 2783 if (le32_to_cpu(req->CreateDisposition) > 2784 le32_to_cpu(FILE_OVERWRITE_IF_LE)) { 2785 pr_err("Invalid create disposition : 0x%x\n", 2786 le32_to_cpu(req->CreateDisposition)); 2787 rc = -EINVAL; 2788 goto err_out2; 2789 } 2790 2791 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { 2792 pr_err("Invalid desired access : 0x%x\n", 2793 le32_to_cpu(req->DesiredAccess)); 2794 rc = -EACCES; 2795 goto err_out2; 2796 } 2797 2798 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { 2799 pr_err("Invalid file attribute : 0x%x\n", 2800 le32_to_cpu(req->FileAttributes)); 2801 rc = -EINVAL; 2802 goto err_out2; 2803 } 2804 2805 if (req->CreateContextsOffset) { 2806 /* Parse non-durable handle create contexts */ 2807 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); 2808 if (IS_ERR(context)) { 2809 rc = PTR_ERR(context); 2810 goto err_out2; 2811 } else if (context) { 2812 ea_buf = (struct create_ea_buf_req *)context; 2813 if (le16_to_cpu(context->DataOffset) + 2814 le32_to_cpu(context->DataLength) < 2815 sizeof(struct create_ea_buf_req)) { 2816 rc = -EINVAL; 2817 goto err_out2; 2818 } 2819 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { 2820 rsp->hdr.Status = STATUS_ACCESS_DENIED; 2821 rc = -EACCES; 2822 goto err_out2; 2823 } 2824 } 2825 2826 context = smb2_find_context_vals(req, 2827 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); 2828 if (IS_ERR(context)) { 2829 rc = PTR_ERR(context); 2830 goto err_out2; 2831 } else if (context) { 2832 ksmbd_debug(SMB, 2833 "get query maximal access context\n"); 2834 maximal_access_ctxt = 1; 2835 } 2836 2837 context = smb2_find_context_vals(req, 2838 SMB2_CREATE_TIMEWARP_REQUEST, 4); 2839 if (IS_ERR(context)) { 2840 rc = PTR_ERR(context); 2841 goto err_out2; 2842 } else if (context) { 2843 ksmbd_debug(SMB, "get timewarp context\n"); 2844 rc = -EBADF; 2845 goto err_out2; 2846 } 2847 2848 if (tcon->posix_extensions) { 2849 context = smb2_find_context_vals(req, 2850 SMB2_CREATE_TAG_POSIX, 16); 2851 if (IS_ERR(context)) { 2852 rc = PTR_ERR(context); 2853 goto err_out2; 2854 } else if (context) { 2855 struct create_posix *posix = 2856 (struct create_posix *)context; 2857 if (le16_to_cpu(context->DataOffset) + 2858 le32_to_cpu(context->DataLength) < 2859 sizeof(struct create_posix) - 4) { 2860 rc = -EINVAL; 2861 goto err_out2; 2862 } 2863 ksmbd_debug(SMB, "get posix context\n"); 2864 2865 posix_mode = le32_to_cpu(posix->Mode); 2866 posix_ctxt = 1; 2867 } 2868 } 2869 } 2870 2871 if (ksmbd_override_fsids(work)) { 2872 rc = -ENOMEM; 2873 goto err_out2; 2874 } 2875 2876 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, 2877 &parent_path, &path, 1); 2878 if (!rc) { 2879 file_present = true; 2880 2881 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { 2882 /* 2883 * If file exists with under flags, return access 2884 * denied error. 2885 */ 2886 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || 2887 req->CreateDisposition == FILE_OPEN_IF_LE) { 2888 rc = -EACCES; 2889 goto err_out; 2890 } 2891 2892 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2893 ksmbd_debug(SMB, 2894 "User does not have write permission\n"); 2895 rc = -EACCES; 2896 goto err_out; 2897 } 2898 } else if (d_is_symlink(path.dentry)) { 2899 rc = -EACCES; 2900 goto err_out; 2901 } 2902 2903 file_present = true; 2904 idmap = mnt_idmap(path.mnt); 2905 } else { 2906 if (rc != -ENOENT) 2907 goto err_out; 2908 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", 2909 name, rc); 2910 rc = 0; 2911 } 2912 2913 if (stream_name) { 2914 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { 2915 if (s_type == DATA_STREAM) { 2916 rc = -EIO; 2917 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2918 } 2919 } else { 2920 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && 2921 s_type == DATA_STREAM) { 2922 rc = -EIO; 2923 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2924 } 2925 } 2926 2927 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && 2928 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { 2929 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2930 rc = -EIO; 2931 } 2932 2933 if (rc < 0) 2934 goto err_out; 2935 } 2936 2937 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && 2938 S_ISDIR(d_inode(path.dentry)->i_mode) && 2939 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2940 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", 2941 name, req->CreateOptions); 2942 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 2943 rc = -EIO; 2944 goto err_out; 2945 } 2946 2947 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && 2948 !(req->CreateDisposition == FILE_CREATE_LE) && 2949 !S_ISDIR(d_inode(path.dentry)->i_mode)) { 2950 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; 2951 rc = -EIO; 2952 goto err_out; 2953 } 2954 2955 if (!stream_name && file_present && 2956 req->CreateDisposition == FILE_CREATE_LE) { 2957 rc = -EEXIST; 2958 goto err_out; 2959 } 2960 2961 daccess = smb_map_generic_desired_access(req->DesiredAccess); 2962 2963 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 2964 rc = smb_check_perm_dacl(conn, &path, &daccess, 2965 sess->user->uid); 2966 if (rc) 2967 goto err_out; 2968 } 2969 2970 if (daccess & FILE_MAXIMAL_ACCESS_LE) { 2971 if (!file_present) { 2972 daccess = cpu_to_le32(GENERIC_ALL_FLAGS); 2973 } else { 2974 ksmbd_vfs_query_maximal_access(idmap, 2975 path.dentry, 2976 &daccess); 2977 already_permitted = true; 2978 } 2979 maximal_access = daccess; 2980 } 2981 2982 open_flags = smb2_create_open_flags(file_present, daccess, 2983 req->CreateDisposition, 2984 &may_flags); 2985 2986 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 2987 if (open_flags & (O_CREAT | O_TRUNC)) { 2988 ksmbd_debug(SMB, 2989 "User does not have write permission\n"); 2990 rc = -EACCES; 2991 goto err_out; 2992 } 2993 } 2994 2995 /*create file if not present */ 2996 if (!file_present) { 2997 rc = smb2_creat(work, &parent_path, &path, name, open_flags, 2998 posix_mode, 2999 req->CreateOptions & FILE_DIRECTORY_FILE_LE); 3000 if (rc) { 3001 if (rc == -ENOENT) { 3002 rc = -EIO; 3003 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; 3004 } 3005 goto err_out; 3006 } 3007 3008 created = true; 3009 idmap = mnt_idmap(path.mnt); 3010 if (ea_buf) { 3011 if (le32_to_cpu(ea_buf->ccontext.DataLength) < 3012 sizeof(struct smb2_ea_info)) { 3013 rc = -EINVAL; 3014 goto err_out; 3015 } 3016 3017 rc = smb2_set_ea(&ea_buf->ea, 3018 le32_to_cpu(ea_buf->ccontext.DataLength), 3019 &path, false); 3020 if (rc == -EOPNOTSUPP) 3021 rc = 0; 3022 else if (rc) 3023 goto err_out; 3024 } 3025 } else if (!already_permitted) { 3026 /* FILE_READ_ATTRIBUTE is allowed without inode_permission, 3027 * because execute(search) permission on a parent directory, 3028 * is already granted. 3029 */ 3030 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { 3031 rc = inode_permission(idmap, 3032 d_inode(path.dentry), 3033 may_flags); 3034 if (rc) 3035 goto err_out; 3036 3037 if ((daccess & FILE_DELETE_LE) || 3038 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { 3039 rc = inode_permission(idmap, 3040 d_inode(path.dentry->d_parent), 3041 MAY_EXEC | MAY_WRITE); 3042 if (rc) 3043 goto err_out; 3044 } 3045 } 3046 } 3047 3048 rc = ksmbd_query_inode_status(path.dentry->d_parent); 3049 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { 3050 rc = -EBUSY; 3051 goto err_out; 3052 } 3053 3054 rc = 0; 3055 filp = dentry_open(&path, open_flags, current_cred()); 3056 if (IS_ERR(filp)) { 3057 rc = PTR_ERR(filp); 3058 pr_err("dentry open for dir failed, rc %d\n", rc); 3059 goto err_out; 3060 } 3061 3062 if (file_present) { 3063 if (!(open_flags & O_TRUNC)) 3064 file_info = FILE_OPENED; 3065 else 3066 file_info = FILE_OVERWRITTEN; 3067 3068 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == 3069 FILE_SUPERSEDE_LE) 3070 file_info = FILE_SUPERSEDED; 3071 } else if (open_flags & O_CREAT) { 3072 file_info = FILE_CREATED; 3073 } 3074 3075 ksmbd_vfs_set_fadvise(filp, req->CreateOptions); 3076 3077 /* Obtain Volatile-ID */ 3078 fp = ksmbd_open_fd(work, filp); 3079 if (IS_ERR(fp)) { 3080 fput(filp); 3081 rc = PTR_ERR(fp); 3082 fp = NULL; 3083 goto err_out; 3084 } 3085 3086 /* Get Persistent-ID */ 3087 ksmbd_open_durable_fd(fp); 3088 if (!has_file_id(fp->persistent_id)) { 3089 rc = -ENOMEM; 3090 goto err_out; 3091 } 3092 3093 fp->cdoption = req->CreateDisposition; 3094 fp->daccess = daccess; 3095 fp->saccess = req->ShareAccess; 3096 fp->coption = req->CreateOptions; 3097 3098 /* Set default windows and posix acls if creating new file */ 3099 if (created) { 3100 int posix_acl_rc; 3101 struct inode *inode = d_inode(path.dentry); 3102 3103 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, 3104 &path, 3105 d_inode(path.dentry->d_parent)); 3106 if (posix_acl_rc) 3107 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); 3108 3109 if (test_share_config_flag(work->tcon->share_conf, 3110 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3111 rc = smb_inherit_dacl(conn, &path, sess->user->uid, 3112 sess->user->gid); 3113 } 3114 3115 if (rc) { 3116 rc = smb2_create_sd_buffer(work, req, &path); 3117 if (rc) { 3118 if (posix_acl_rc) 3119 ksmbd_vfs_set_init_posix_acl(idmap, 3120 &path); 3121 3122 if (test_share_config_flag(work->tcon->share_conf, 3123 KSMBD_SHARE_FLAG_ACL_XATTR)) { 3124 struct smb_fattr fattr; 3125 struct smb_ntsd *pntsd; 3126 int pntsd_size, ace_num = 0; 3127 3128 ksmbd_acls_fattr(&fattr, idmap, inode); 3129 if (fattr.cf_acls) 3130 ace_num = fattr.cf_acls->a_count; 3131 if (fattr.cf_dacls) 3132 ace_num += fattr.cf_dacls->a_count; 3133 3134 pntsd = kmalloc(sizeof(struct smb_ntsd) + 3135 sizeof(struct smb_sid) * 3 + 3136 sizeof(struct smb_acl) + 3137 sizeof(struct smb_ace) * ace_num * 2, 3138 GFP_KERNEL); 3139 if (!pntsd) { 3140 posix_acl_release(fattr.cf_acls); 3141 posix_acl_release(fattr.cf_dacls); 3142 goto err_out; 3143 } 3144 3145 rc = build_sec_desc(idmap, 3146 pntsd, NULL, 0, 3147 OWNER_SECINFO | 3148 GROUP_SECINFO | 3149 DACL_SECINFO, 3150 &pntsd_size, &fattr); 3151 posix_acl_release(fattr.cf_acls); 3152 posix_acl_release(fattr.cf_dacls); 3153 if (rc) { 3154 kfree(pntsd); 3155 goto err_out; 3156 } 3157 3158 rc = ksmbd_vfs_set_sd_xattr(conn, 3159 idmap, 3160 &path, 3161 pntsd, 3162 pntsd_size, 3163 false); 3164 kfree(pntsd); 3165 if (rc) 3166 pr_err("failed to store ntacl in xattr : %d\n", 3167 rc); 3168 } 3169 } 3170 } 3171 rc = 0; 3172 } 3173 3174 if (stream_name) { 3175 rc = smb2_set_stream_name_xattr(&path, 3176 fp, 3177 stream_name, 3178 s_type); 3179 if (rc) 3180 goto err_out; 3181 file_info = FILE_CREATED; 3182 } 3183 3184 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | 3185 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); 3186 3187 /* fp should be searchable through ksmbd_inode.m_fp_list 3188 * after daccess, saccess, attrib_only, and stream are 3189 * initialized. 3190 */ 3191 write_lock(&fp->f_ci->m_lock); 3192 list_add(&fp->node, &fp->f_ci->m_fp_list); 3193 write_unlock(&fp->f_ci->m_lock); 3194 3195 /* Check delete pending among previous fp before oplock break */ 3196 if (ksmbd_inode_pending_delete(fp)) { 3197 rc = -EBUSY; 3198 goto err_out; 3199 } 3200 3201 if (file_present || created) 3202 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 3203 3204 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && 3205 !fp->attrib_only && !stream_name) { 3206 smb_break_all_oplock(work, fp); 3207 need_truncate = 1; 3208 } 3209 3210 req_op_level = req->RequestedOplockLevel; 3211 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) 3212 lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode)); 3213 3214 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); 3215 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || 3216 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && 3217 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { 3218 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { 3219 rc = share_ret; 3220 goto err_out1; 3221 } 3222 } else { 3223 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) { 3224 /* 3225 * Compare parent lease using parent key. If there is no 3226 * a lease that has same parent key, Send lease break 3227 * notification. 3228 */ 3229 smb_send_parent_lease_break_noti(fp, lc); 3230 3231 req_op_level = smb2_map_lease_to_oplock(lc->req_state); 3232 ksmbd_debug(SMB, 3233 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", 3234 name, req_op_level, lc->req_state); 3235 rc = find_same_lease_key(sess, fp->f_ci, lc); 3236 if (rc) 3237 goto err_out1; 3238 } else if (open_flags == O_RDONLY && 3239 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || 3240 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) 3241 req_op_level = SMB2_OPLOCK_LEVEL_II; 3242 3243 rc = smb_grant_oplock(work, req_op_level, 3244 fp->persistent_id, fp, 3245 le32_to_cpu(req->hdr.Id.SyncId.TreeId), 3246 lc, share_ret); 3247 if (rc < 0) 3248 goto err_out1; 3249 } 3250 3251 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) 3252 ksmbd_fd_set_delete_on_close(fp, file_info); 3253 3254 if (need_truncate) { 3255 rc = smb2_create_truncate(&fp->filp->f_path); 3256 if (rc) 3257 goto err_out1; 3258 } 3259 3260 if (req->CreateContextsOffset) { 3261 struct create_alloc_size_req *az_req; 3262 3263 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, 3264 SMB2_CREATE_ALLOCATION_SIZE, 4); 3265 if (IS_ERR(az_req)) { 3266 rc = PTR_ERR(az_req); 3267 goto err_out1; 3268 } else if (az_req) { 3269 loff_t alloc_size; 3270 int err; 3271 3272 if (le16_to_cpu(az_req->ccontext.DataOffset) + 3273 le32_to_cpu(az_req->ccontext.DataLength) < 3274 sizeof(struct create_alloc_size_req)) { 3275 rc = -EINVAL; 3276 goto err_out1; 3277 } 3278 alloc_size = le64_to_cpu(az_req->AllocationSize); 3279 ksmbd_debug(SMB, 3280 "request smb2 create allocate size : %llu\n", 3281 alloc_size); 3282 smb_break_all_levII_oplock(work, fp, 1); 3283 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 3284 alloc_size); 3285 if (err < 0) 3286 ksmbd_debug(SMB, 3287 "vfs_fallocate is failed : %d\n", 3288 err); 3289 } 3290 3291 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); 3292 if (IS_ERR(context)) { 3293 rc = PTR_ERR(context); 3294 goto err_out1; 3295 } else if (context) { 3296 ksmbd_debug(SMB, "get query on disk id context\n"); 3297 query_disk_id = 1; 3298 } 3299 } 3300 3301 rc = ksmbd_vfs_getattr(&path, &stat); 3302 if (rc) 3303 goto err_out1; 3304 3305 if (stat.result_mask & STATX_BTIME) 3306 fp->create_time = ksmbd_UnixTimeToNT(stat.btime); 3307 else 3308 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); 3309 if (req->FileAttributes || fp->f_ci->m_fattr == 0) 3310 fp->f_ci->m_fattr = 3311 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); 3312 3313 if (!created) 3314 smb2_update_xattrs(tcon, &path, fp); 3315 else 3316 smb2_new_xattrs(tcon, &path, fp); 3317 3318 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); 3319 3320 rsp->StructureSize = cpu_to_le16(89); 3321 rcu_read_lock(); 3322 opinfo = rcu_dereference(fp->f_opinfo); 3323 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; 3324 rcu_read_unlock(); 3325 rsp->Flags = 0; 3326 rsp->CreateAction = cpu_to_le32(file_info); 3327 rsp->CreationTime = cpu_to_le64(fp->create_time); 3328 time = ksmbd_UnixTimeToNT(stat.atime); 3329 rsp->LastAccessTime = cpu_to_le64(time); 3330 time = ksmbd_UnixTimeToNT(stat.mtime); 3331 rsp->LastWriteTime = cpu_to_le64(time); 3332 time = ksmbd_UnixTimeToNT(stat.ctime); 3333 rsp->ChangeTime = cpu_to_le64(time); 3334 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : 3335 cpu_to_le64(stat.blocks << 9); 3336 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 3337 rsp->FileAttributes = fp->f_ci->m_fattr; 3338 3339 rsp->Reserved2 = 0; 3340 3341 rsp->PersistentFileId = fp->persistent_id; 3342 rsp->VolatileFileId = fp->volatile_id; 3343 3344 rsp->CreateContextsOffset = 0; 3345 rsp->CreateContextsLength = 0; 3346 iov_len = offsetof(struct smb2_create_rsp, Buffer); 3347 3348 /* If lease is request send lease context response */ 3349 if (opinfo && opinfo->is_lease) { 3350 struct create_context *lease_ccontext; 3351 3352 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", 3353 name, opinfo->o_lease->state); 3354 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; 3355 3356 lease_ccontext = (struct create_context *)rsp->Buffer; 3357 contxt_cnt++; 3358 create_lease_buf(rsp->Buffer, opinfo->o_lease); 3359 le32_add_cpu(&rsp->CreateContextsLength, 3360 conn->vals->create_lease_size); 3361 iov_len += conn->vals->create_lease_size; 3362 next_ptr = &lease_ccontext->Next; 3363 next_off = conn->vals->create_lease_size; 3364 } 3365 3366 if (maximal_access_ctxt) { 3367 struct create_context *mxac_ccontext; 3368 3369 if (maximal_access == 0) 3370 ksmbd_vfs_query_maximal_access(idmap, 3371 path.dentry, 3372 &maximal_access); 3373 mxac_ccontext = (struct create_context *)(rsp->Buffer + 3374 le32_to_cpu(rsp->CreateContextsLength)); 3375 contxt_cnt++; 3376 create_mxac_rsp_buf(rsp->Buffer + 3377 le32_to_cpu(rsp->CreateContextsLength), 3378 le32_to_cpu(maximal_access)); 3379 le32_add_cpu(&rsp->CreateContextsLength, 3380 conn->vals->create_mxac_size); 3381 iov_len += conn->vals->create_mxac_size; 3382 if (next_ptr) 3383 *next_ptr = cpu_to_le32(next_off); 3384 next_ptr = &mxac_ccontext->Next; 3385 next_off = conn->vals->create_mxac_size; 3386 } 3387 3388 if (query_disk_id) { 3389 struct create_context *disk_id_ccontext; 3390 3391 disk_id_ccontext = (struct create_context *)(rsp->Buffer + 3392 le32_to_cpu(rsp->CreateContextsLength)); 3393 contxt_cnt++; 3394 create_disk_id_rsp_buf(rsp->Buffer + 3395 le32_to_cpu(rsp->CreateContextsLength), 3396 stat.ino, tcon->id); 3397 le32_add_cpu(&rsp->CreateContextsLength, 3398 conn->vals->create_disk_id_size); 3399 iov_len += conn->vals->create_disk_id_size; 3400 if (next_ptr) 3401 *next_ptr = cpu_to_le32(next_off); 3402 next_ptr = &disk_id_ccontext->Next; 3403 next_off = conn->vals->create_disk_id_size; 3404 } 3405 3406 if (posix_ctxt) { 3407 contxt_cnt++; 3408 create_posix_rsp_buf(rsp->Buffer + 3409 le32_to_cpu(rsp->CreateContextsLength), 3410 fp); 3411 le32_add_cpu(&rsp->CreateContextsLength, 3412 conn->vals->create_posix_size); 3413 iov_len += conn->vals->create_posix_size; 3414 if (next_ptr) 3415 *next_ptr = cpu_to_le32(next_off); 3416 } 3417 3418 if (contxt_cnt > 0) { 3419 rsp->CreateContextsOffset = 3420 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); 3421 } 3422 3423err_out: 3424 if (rc && (file_present || created)) 3425 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 3426 3427err_out1: 3428 ksmbd_revert_fsids(work); 3429 3430err_out2: 3431 if (!rc) { 3432 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); 3433 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); 3434 } 3435 if (rc) { 3436 if (rc == -EINVAL) 3437 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 3438 else if (rc == -EOPNOTSUPP) 3439 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 3440 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) 3441 rsp->hdr.Status = STATUS_ACCESS_DENIED; 3442 else if (rc == -ENOENT) 3443 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 3444 else if (rc == -EPERM) 3445 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 3446 else if (rc == -EBUSY) 3447 rsp->hdr.Status = STATUS_DELETE_PENDING; 3448 else if (rc == -EBADF) 3449 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 3450 else if (rc == -ENOEXEC) 3451 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; 3452 else if (rc == -ENXIO) 3453 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; 3454 else if (rc == -EEXIST) 3455 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 3456 else if (rc == -EMFILE) 3457 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 3458 if (!rsp->hdr.Status) 3459 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 3460 3461 if (fp) 3462 ksmbd_fd_put(work, fp); 3463 smb2_set_err_rsp(work); 3464 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); 3465 } 3466 3467 kfree(name); 3468 kfree(lc); 3469 3470 return 0; 3471} 3472 3473static int readdir_info_level_struct_sz(int info_level) 3474{ 3475 switch (info_level) { 3476 case FILE_FULL_DIRECTORY_INFORMATION: 3477 return sizeof(struct file_full_directory_info); 3478 case FILE_BOTH_DIRECTORY_INFORMATION: 3479 return sizeof(struct file_both_directory_info); 3480 case FILE_DIRECTORY_INFORMATION: 3481 return sizeof(struct file_directory_info); 3482 case FILE_NAMES_INFORMATION: 3483 return sizeof(struct file_names_info); 3484 case FILEID_FULL_DIRECTORY_INFORMATION: 3485 return sizeof(struct file_id_full_dir_info); 3486 case FILEID_BOTH_DIRECTORY_INFORMATION: 3487 return sizeof(struct file_id_both_directory_info); 3488 case SMB_FIND_FILE_POSIX_INFO: 3489 return sizeof(struct smb2_posix_info); 3490 default: 3491 return -EOPNOTSUPP; 3492 } 3493} 3494 3495static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) 3496{ 3497 switch (info_level) { 3498 case FILE_FULL_DIRECTORY_INFORMATION: 3499 { 3500 struct file_full_directory_info *ffdinfo; 3501 3502 ffdinfo = (struct file_full_directory_info *)d_info->rptr; 3503 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); 3504 d_info->name = ffdinfo->FileName; 3505 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); 3506 return 0; 3507 } 3508 case FILE_BOTH_DIRECTORY_INFORMATION: 3509 { 3510 struct file_both_directory_info *fbdinfo; 3511 3512 fbdinfo = (struct file_both_directory_info *)d_info->rptr; 3513 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); 3514 d_info->name = fbdinfo->FileName; 3515 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); 3516 return 0; 3517 } 3518 case FILE_DIRECTORY_INFORMATION: 3519 { 3520 struct file_directory_info *fdinfo; 3521 3522 fdinfo = (struct file_directory_info *)d_info->rptr; 3523 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); 3524 d_info->name = fdinfo->FileName; 3525 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); 3526 return 0; 3527 } 3528 case FILE_NAMES_INFORMATION: 3529 { 3530 struct file_names_info *fninfo; 3531 3532 fninfo = (struct file_names_info *)d_info->rptr; 3533 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); 3534 d_info->name = fninfo->FileName; 3535 d_info->name_len = le32_to_cpu(fninfo->FileNameLength); 3536 return 0; 3537 } 3538 case FILEID_FULL_DIRECTORY_INFORMATION: 3539 { 3540 struct file_id_full_dir_info *dinfo; 3541 3542 dinfo = (struct file_id_full_dir_info *)d_info->rptr; 3543 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); 3544 d_info->name = dinfo->FileName; 3545 d_info->name_len = le32_to_cpu(dinfo->FileNameLength); 3546 return 0; 3547 } 3548 case FILEID_BOTH_DIRECTORY_INFORMATION: 3549 { 3550 struct file_id_both_directory_info *fibdinfo; 3551 3552 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; 3553 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); 3554 d_info->name = fibdinfo->FileName; 3555 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); 3556 return 0; 3557 } 3558 case SMB_FIND_FILE_POSIX_INFO: 3559 { 3560 struct smb2_posix_info *posix_info; 3561 3562 posix_info = (struct smb2_posix_info *)d_info->rptr; 3563 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); 3564 d_info->name = posix_info->name; 3565 d_info->name_len = le32_to_cpu(posix_info->name_len); 3566 return 0; 3567 } 3568 default: 3569 return -EINVAL; 3570 } 3571} 3572 3573/** 3574 * smb2_populate_readdir_entry() - encode directory entry in smb2 response 3575 * buffer 3576 * @conn: connection instance 3577 * @info_level: smb information level 3578 * @d_info: structure included variables for query dir 3579 * @ksmbd_kstat: ksmbd wrapper of dirent stat information 3580 * 3581 * if directory has many entries, find first can't read it fully. 3582 * find next might be called multiple times to read remaining dir entries 3583 * 3584 * Return: 0 on success, otherwise error 3585 */ 3586static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, 3587 struct ksmbd_dir_info *d_info, 3588 struct ksmbd_kstat *ksmbd_kstat) 3589{ 3590 int next_entry_offset = 0; 3591 char *conv_name; 3592 int conv_len; 3593 void *kstat; 3594 int struct_sz, rc = 0; 3595 3596 conv_name = ksmbd_convert_dir_info_name(d_info, 3597 conn->local_nls, 3598 &conv_len); 3599 if (!conv_name) 3600 return -ENOMEM; 3601 3602 /* Somehow the name has only terminating NULL bytes */ 3603 if (conv_len < 0) { 3604 rc = -EINVAL; 3605 goto free_conv_name; 3606 } 3607 3608 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; 3609 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); 3610 d_info->last_entry_off_align = next_entry_offset - struct_sz; 3611 3612 if (next_entry_offset > d_info->out_buf_len) { 3613 d_info->out_buf_len = 0; 3614 rc = -ENOSPC; 3615 goto free_conv_name; 3616 } 3617 3618 kstat = d_info->wptr; 3619 if (info_level != FILE_NAMES_INFORMATION) 3620 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); 3621 3622 switch (info_level) { 3623 case FILE_FULL_DIRECTORY_INFORMATION: 3624 { 3625 struct file_full_directory_info *ffdinfo; 3626 3627 ffdinfo = (struct file_full_directory_info *)kstat; 3628 ffdinfo->FileNameLength = cpu_to_le32(conv_len); 3629 ffdinfo->EaSize = 3630 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3631 if (ffdinfo->EaSize) 3632 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3633 if (d_info->hide_dot_file && d_info->name[0] == '.') 3634 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3635 memcpy(ffdinfo->FileName, conv_name, conv_len); 3636 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3637 break; 3638 } 3639 case FILE_BOTH_DIRECTORY_INFORMATION: 3640 { 3641 struct file_both_directory_info *fbdinfo; 3642 3643 fbdinfo = (struct file_both_directory_info *)kstat; 3644 fbdinfo->FileNameLength = cpu_to_le32(conv_len); 3645 fbdinfo->EaSize = 3646 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3647 if (fbdinfo->EaSize) 3648 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3649 fbdinfo->ShortNameLength = 0; 3650 fbdinfo->Reserved = 0; 3651 if (d_info->hide_dot_file && d_info->name[0] == '.') 3652 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3653 memcpy(fbdinfo->FileName, conv_name, conv_len); 3654 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3655 break; 3656 } 3657 case FILE_DIRECTORY_INFORMATION: 3658 { 3659 struct file_directory_info *fdinfo; 3660 3661 fdinfo = (struct file_directory_info *)kstat; 3662 fdinfo->FileNameLength = cpu_to_le32(conv_len); 3663 if (d_info->hide_dot_file && d_info->name[0] == '.') 3664 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3665 memcpy(fdinfo->FileName, conv_name, conv_len); 3666 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3667 break; 3668 } 3669 case FILE_NAMES_INFORMATION: 3670 { 3671 struct file_names_info *fninfo; 3672 3673 fninfo = (struct file_names_info *)kstat; 3674 fninfo->FileNameLength = cpu_to_le32(conv_len); 3675 memcpy(fninfo->FileName, conv_name, conv_len); 3676 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3677 break; 3678 } 3679 case FILEID_FULL_DIRECTORY_INFORMATION: 3680 { 3681 struct file_id_full_dir_info *dinfo; 3682 3683 dinfo = (struct file_id_full_dir_info *)kstat; 3684 dinfo->FileNameLength = cpu_to_le32(conv_len); 3685 dinfo->EaSize = 3686 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3687 if (dinfo->EaSize) 3688 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3689 dinfo->Reserved = 0; 3690 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3691 if (d_info->hide_dot_file && d_info->name[0] == '.') 3692 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3693 memcpy(dinfo->FileName, conv_name, conv_len); 3694 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3695 break; 3696 } 3697 case FILEID_BOTH_DIRECTORY_INFORMATION: 3698 { 3699 struct file_id_both_directory_info *fibdinfo; 3700 3701 fibdinfo = (struct file_id_both_directory_info *)kstat; 3702 fibdinfo->FileNameLength = cpu_to_le32(conv_len); 3703 fibdinfo->EaSize = 3704 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); 3705 if (fibdinfo->EaSize) 3706 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; 3707 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); 3708 fibdinfo->ShortNameLength = 0; 3709 fibdinfo->Reserved = 0; 3710 fibdinfo->Reserved2 = cpu_to_le16(0); 3711 if (d_info->hide_dot_file && d_info->name[0] == '.') 3712 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3713 memcpy(fibdinfo->FileName, conv_name, conv_len); 3714 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3715 break; 3716 } 3717 case SMB_FIND_FILE_POSIX_INFO: 3718 { 3719 struct smb2_posix_info *posix_info; 3720 u64 time; 3721 3722 posix_info = (struct smb2_posix_info *)kstat; 3723 posix_info->Ignored = 0; 3724 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); 3725 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); 3726 posix_info->ChangeTime = cpu_to_le64(time); 3727 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); 3728 posix_info->LastAccessTime = cpu_to_le64(time); 3729 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); 3730 posix_info->LastWriteTime = cpu_to_le64(time); 3731 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); 3732 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); 3733 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); 3734 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); 3735 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); 3736 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); 3737 posix_info->DosAttributes = 3738 S_ISDIR(ksmbd_kstat->kstat->mode) ? 3739 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; 3740 if (d_info->hide_dot_file && d_info->name[0] == '.') 3741 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; 3742 /* 3743 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). 3744 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 3745 * sub_auth(4 * 1(num_subauth)) + RID(4). 3746 */ 3747 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), 3748 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); 3749 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), 3750 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); 3751 memcpy(posix_info->name, conv_name, conv_len); 3752 posix_info->name_len = cpu_to_le32(conv_len); 3753 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); 3754 break; 3755 } 3756 3757 } /* switch (info_level) */ 3758 3759 d_info->last_entry_offset = d_info->data_count; 3760 d_info->data_count += next_entry_offset; 3761 d_info->out_buf_len -= next_entry_offset; 3762 d_info->wptr += next_entry_offset; 3763 3764 ksmbd_debug(SMB, 3765 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", 3766 info_level, d_info->out_buf_len, 3767 next_entry_offset, d_info->data_count); 3768 3769free_conv_name: 3770 kfree(conv_name); 3771 return rc; 3772} 3773 3774struct smb2_query_dir_private { 3775 struct ksmbd_work *work; 3776 char *search_pattern; 3777 struct ksmbd_file *dir_fp; 3778 3779 struct ksmbd_dir_info *d_info; 3780 int info_level; 3781}; 3782 3783static void lock_dir(struct ksmbd_file *dir_fp) 3784{ 3785 struct dentry *dir = dir_fp->filp->f_path.dentry; 3786 3787 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); 3788} 3789 3790static void unlock_dir(struct ksmbd_file *dir_fp) 3791{ 3792 struct dentry *dir = dir_fp->filp->f_path.dentry; 3793 3794 inode_unlock(d_inode(dir)); 3795} 3796 3797static int process_query_dir_entries(struct smb2_query_dir_private *priv) 3798{ 3799 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); 3800 struct kstat kstat; 3801 struct ksmbd_kstat ksmbd_kstat; 3802 int rc; 3803 int i; 3804 3805 for (i = 0; i < priv->d_info->num_entry; i++) { 3806 struct dentry *dent; 3807 3808 if (dentry_name(priv->d_info, priv->info_level)) 3809 return -EINVAL; 3810 3811 lock_dir(priv->dir_fp); 3812 dent = lookup_one(idmap, priv->d_info->name, 3813 priv->dir_fp->filp->f_path.dentry, 3814 priv->d_info->name_len); 3815 unlock_dir(priv->dir_fp); 3816 3817 if (IS_ERR(dent)) { 3818 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", 3819 priv->d_info->name, 3820 PTR_ERR(dent)); 3821 continue; 3822 } 3823 if (unlikely(d_is_negative(dent))) { 3824 dput(dent); 3825 ksmbd_debug(SMB, "Negative dentry `%s'\n", 3826 priv->d_info->name); 3827 continue; 3828 } 3829 3830 ksmbd_kstat.kstat = &kstat; 3831 if (priv->info_level != FILE_NAMES_INFORMATION) 3832 ksmbd_vfs_fill_dentry_attrs(priv->work, 3833 idmap, 3834 dent, 3835 &ksmbd_kstat); 3836 3837 rc = smb2_populate_readdir_entry(priv->work->conn, 3838 priv->info_level, 3839 priv->d_info, 3840 &ksmbd_kstat); 3841 dput(dent); 3842 if (rc) 3843 return rc; 3844 } 3845 return 0; 3846} 3847 3848static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, 3849 int info_level) 3850{ 3851 int struct_sz; 3852 int conv_len; 3853 int next_entry_offset; 3854 3855 struct_sz = readdir_info_level_struct_sz(info_level); 3856 if (struct_sz == -EOPNOTSUPP) 3857 return -EOPNOTSUPP; 3858 3859 conv_len = (d_info->name_len + 1) * 2; 3860 next_entry_offset = ALIGN(struct_sz + conv_len, 3861 KSMBD_DIR_INFO_ALIGNMENT); 3862 3863 if (next_entry_offset > d_info->out_buf_len) { 3864 d_info->out_buf_len = 0; 3865 return -ENOSPC; 3866 } 3867 3868 switch (info_level) { 3869 case FILE_FULL_DIRECTORY_INFORMATION: 3870 { 3871 struct file_full_directory_info *ffdinfo; 3872 3873 ffdinfo = (struct file_full_directory_info *)d_info->wptr; 3874 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); 3875 ffdinfo->FileName[d_info->name_len] = 0x00; 3876 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3877 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3878 break; 3879 } 3880 case FILE_BOTH_DIRECTORY_INFORMATION: 3881 { 3882 struct file_both_directory_info *fbdinfo; 3883 3884 fbdinfo = (struct file_both_directory_info *)d_info->wptr; 3885 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); 3886 fbdinfo->FileName[d_info->name_len] = 0x00; 3887 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3888 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3889 break; 3890 } 3891 case FILE_DIRECTORY_INFORMATION: 3892 { 3893 struct file_directory_info *fdinfo; 3894 3895 fdinfo = (struct file_directory_info *)d_info->wptr; 3896 memcpy(fdinfo->FileName, d_info->name, d_info->name_len); 3897 fdinfo->FileName[d_info->name_len] = 0x00; 3898 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3899 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3900 break; 3901 } 3902 case FILE_NAMES_INFORMATION: 3903 { 3904 struct file_names_info *fninfo; 3905 3906 fninfo = (struct file_names_info *)d_info->wptr; 3907 memcpy(fninfo->FileName, d_info->name, d_info->name_len); 3908 fninfo->FileName[d_info->name_len] = 0x00; 3909 fninfo->FileNameLength = cpu_to_le32(d_info->name_len); 3910 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3911 break; 3912 } 3913 case FILEID_FULL_DIRECTORY_INFORMATION: 3914 { 3915 struct file_id_full_dir_info *dinfo; 3916 3917 dinfo = (struct file_id_full_dir_info *)d_info->wptr; 3918 memcpy(dinfo->FileName, d_info->name, d_info->name_len); 3919 dinfo->FileName[d_info->name_len] = 0x00; 3920 dinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3921 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3922 break; 3923 } 3924 case FILEID_BOTH_DIRECTORY_INFORMATION: 3925 { 3926 struct file_id_both_directory_info *fibdinfo; 3927 3928 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; 3929 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); 3930 fibdinfo->FileName[d_info->name_len] = 0x00; 3931 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); 3932 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); 3933 break; 3934 } 3935 case SMB_FIND_FILE_POSIX_INFO: 3936 { 3937 struct smb2_posix_info *posix_info; 3938 3939 posix_info = (struct smb2_posix_info *)d_info->wptr; 3940 memcpy(posix_info->name, d_info->name, d_info->name_len); 3941 posix_info->name[d_info->name_len] = 0x00; 3942 posix_info->name_len = cpu_to_le32(d_info->name_len); 3943 posix_info->NextEntryOffset = 3944 cpu_to_le32(next_entry_offset); 3945 break; 3946 } 3947 } /* switch (info_level) */ 3948 3949 d_info->num_entry++; 3950 d_info->out_buf_len -= next_entry_offset; 3951 d_info->wptr += next_entry_offset; 3952 return 0; 3953} 3954 3955static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, 3956 loff_t offset, u64 ino, unsigned int d_type) 3957{ 3958 struct ksmbd_readdir_data *buf; 3959 struct smb2_query_dir_private *priv; 3960 struct ksmbd_dir_info *d_info; 3961 int rc; 3962 3963 buf = container_of(ctx, struct ksmbd_readdir_data, ctx); 3964 priv = buf->private; 3965 d_info = priv->d_info; 3966 3967 /* dot and dotdot entries are already reserved */ 3968 if (!strcmp(".", name) || !strcmp("..", name)) 3969 return true; 3970 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) 3971 return true; 3972 if (!match_pattern(name, namlen, priv->search_pattern)) 3973 return true; 3974 3975 d_info->name = name; 3976 d_info->name_len = namlen; 3977 rc = reserve_populate_dentry(d_info, priv->info_level); 3978 if (rc) 3979 return false; 3980 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) 3981 d_info->out_buf_len = 0; 3982 return true; 3983} 3984 3985static int verify_info_level(int info_level) 3986{ 3987 switch (info_level) { 3988 case FILE_FULL_DIRECTORY_INFORMATION: 3989 case FILE_BOTH_DIRECTORY_INFORMATION: 3990 case FILE_DIRECTORY_INFORMATION: 3991 case FILE_NAMES_INFORMATION: 3992 case FILEID_FULL_DIRECTORY_INFORMATION: 3993 case FILEID_BOTH_DIRECTORY_INFORMATION: 3994 case SMB_FIND_FILE_POSIX_INFO: 3995 break; 3996 default: 3997 return -EOPNOTSUPP; 3998 } 3999 4000 return 0; 4001} 4002 4003static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) 4004{ 4005 int free_len; 4006 4007 free_len = (int)(work->response_sz - 4008 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; 4009 return free_len; 4010} 4011 4012static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, 4013 unsigned short hdr2_len, 4014 unsigned int out_buf_len) 4015{ 4016 int free_len; 4017 4018 if (out_buf_len > work->conn->vals->max_trans_size) 4019 return -EINVAL; 4020 4021 free_len = smb2_resp_buf_len(work, hdr2_len); 4022 if (free_len < 0) 4023 return -EINVAL; 4024 4025 return min_t(int, out_buf_len, free_len); 4026} 4027 4028int smb2_query_dir(struct ksmbd_work *work) 4029{ 4030 struct ksmbd_conn *conn = work->conn; 4031 struct smb2_query_directory_req *req; 4032 struct smb2_query_directory_rsp *rsp; 4033 struct ksmbd_share_config *share = work->tcon->share_conf; 4034 struct ksmbd_file *dir_fp = NULL; 4035 struct ksmbd_dir_info d_info; 4036 int rc = 0; 4037 char *srch_ptr = NULL; 4038 unsigned char srch_flag; 4039 int buffer_sz; 4040 struct smb2_query_dir_private query_dir_private = {NULL, }; 4041 4042 WORK_BUFFERS(work, req, rsp); 4043 4044 if (ksmbd_override_fsids(work)) { 4045 rsp->hdr.Status = STATUS_NO_MEMORY; 4046 smb2_set_err_rsp(work); 4047 return -ENOMEM; 4048 } 4049 4050 rc = verify_info_level(req->FileInformationClass); 4051 if (rc) { 4052 rc = -EFAULT; 4053 goto err_out2; 4054 } 4055 4056 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 4057 if (!dir_fp) { 4058 rc = -EBADF; 4059 goto err_out2; 4060 } 4061 4062 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || 4063 inode_permission(file_mnt_idmap(dir_fp->filp), 4064 file_inode(dir_fp->filp), 4065 MAY_READ | MAY_EXEC)) { 4066 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); 4067 rc = -EACCES; 4068 goto err_out2; 4069 } 4070 4071 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { 4072 pr_err("can't do query dir for a file\n"); 4073 rc = -EINVAL; 4074 goto err_out2; 4075 } 4076 4077 srch_flag = req->Flags; 4078 srch_ptr = smb_strndup_from_utf16(req->Buffer, 4079 le16_to_cpu(req->FileNameLength), 1, 4080 conn->local_nls); 4081 if (IS_ERR(srch_ptr)) { 4082 ksmbd_debug(SMB, "Search Pattern not found\n"); 4083 rc = -EINVAL; 4084 goto err_out2; 4085 } else { 4086 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); 4087 } 4088 4089 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { 4090 ksmbd_debug(SMB, "Restart directory scan\n"); 4091 generic_file_llseek(dir_fp->filp, 0, SEEK_SET); 4092 } 4093 4094 memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); 4095 d_info.wptr = (char *)rsp->Buffer; 4096 d_info.rptr = (char *)rsp->Buffer; 4097 d_info.out_buf_len = 4098 smb2_calc_max_out_buf_len(work, 8, 4099 le32_to_cpu(req->OutputBufferLength)); 4100 if (d_info.out_buf_len < 0) { 4101 rc = -EINVAL; 4102 goto err_out; 4103 } 4104 d_info.flags = srch_flag; 4105 4106 /* 4107 * reserve dot and dotdot entries in head of buffer 4108 * in first response 4109 */ 4110 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, 4111 dir_fp, &d_info, srch_ptr, 4112 smb2_populate_readdir_entry); 4113 if (rc == -ENOSPC) 4114 rc = 0; 4115 else if (rc) 4116 goto err_out; 4117 4118 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) 4119 d_info.hide_dot_file = true; 4120 4121 buffer_sz = d_info.out_buf_len; 4122 d_info.rptr = d_info.wptr; 4123 query_dir_private.work = work; 4124 query_dir_private.search_pattern = srch_ptr; 4125 query_dir_private.dir_fp = dir_fp; 4126 query_dir_private.d_info = &d_info; 4127 query_dir_private.info_level = req->FileInformationClass; 4128 dir_fp->readdir_data.private = &query_dir_private; 4129 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); 4130 4131 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); 4132 /* 4133 * req->OutputBufferLength is too small to contain even one entry. 4134 * In this case, it immediately returns OutputBufferLength 0 to client. 4135 */ 4136 if (!d_info.out_buf_len && !d_info.num_entry) 4137 goto no_buf_len; 4138 if (rc > 0 || rc == -ENOSPC) 4139 rc = 0; 4140 else if (rc) 4141 goto err_out; 4142 4143 d_info.wptr = d_info.rptr; 4144 d_info.out_buf_len = buffer_sz; 4145 rc = process_query_dir_entries(&query_dir_private); 4146 if (rc) 4147 goto err_out; 4148 4149 if (!d_info.data_count && d_info.out_buf_len >= 0) { 4150 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { 4151 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4152 } else { 4153 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; 4154 rsp->hdr.Status = STATUS_NO_MORE_FILES; 4155 } 4156 rsp->StructureSize = cpu_to_le16(9); 4157 rsp->OutputBufferOffset = cpu_to_le16(0); 4158 rsp->OutputBufferLength = cpu_to_le32(0); 4159 rsp->Buffer[0] = 0; 4160 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4161 sizeof(struct smb2_query_directory_rsp)); 4162 if (rc) 4163 goto err_out; 4164 } else { 4165no_buf_len: 4166 ((struct file_directory_info *) 4167 ((char *)rsp->Buffer + d_info.last_entry_offset)) 4168 ->NextEntryOffset = 0; 4169 if (d_info.data_count >= d_info.last_entry_off_align) 4170 d_info.data_count -= d_info.last_entry_off_align; 4171 4172 rsp->StructureSize = cpu_to_le16(9); 4173 rsp->OutputBufferOffset = cpu_to_le16(72); 4174 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); 4175 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 4176 offsetof(struct smb2_query_directory_rsp, Buffer) + 4177 d_info.data_count); 4178 if (rc) 4179 goto err_out; 4180 } 4181 4182 kfree(srch_ptr); 4183 ksmbd_fd_put(work, dir_fp); 4184 ksmbd_revert_fsids(work); 4185 return 0; 4186 4187err_out: 4188 pr_err("error while processing smb2 query dir rc = %d\n", rc); 4189 kfree(srch_ptr); 4190 4191err_out2: 4192 if (rc == -EINVAL) 4193 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 4194 else if (rc == -EACCES) 4195 rsp->hdr.Status = STATUS_ACCESS_DENIED; 4196 else if (rc == -ENOENT) 4197 rsp->hdr.Status = STATUS_NO_SUCH_FILE; 4198 else if (rc == -EBADF) 4199 rsp->hdr.Status = STATUS_FILE_CLOSED; 4200 else if (rc == -ENOMEM) 4201 rsp->hdr.Status = STATUS_NO_MEMORY; 4202 else if (rc == -EFAULT) 4203 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 4204 else if (rc == -EIO) 4205 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; 4206 if (!rsp->hdr.Status) 4207 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 4208 4209 smb2_set_err_rsp(work); 4210 ksmbd_fd_put(work, dir_fp); 4211 ksmbd_revert_fsids(work); 4212 return 0; 4213} 4214 4215/** 4216 * buffer_check_err() - helper function to check buffer errors 4217 * @reqOutputBufferLength: max buffer length expected in command response 4218 * @rsp: query info response buffer contains output buffer length 4219 * @rsp_org: base response buffer pointer in case of chained response 4220 * 4221 * Return: 0 on success, otherwise error 4222 */ 4223static int buffer_check_err(int reqOutputBufferLength, 4224 struct smb2_query_info_rsp *rsp, 4225 void *rsp_org) 4226{ 4227 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { 4228 pr_err("Invalid Buffer Size Requested\n"); 4229 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; 4230 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); 4231 return -EINVAL; 4232 } 4233 return 0; 4234} 4235 4236static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, 4237 void *rsp_org) 4238{ 4239 struct smb2_file_standard_info *sinfo; 4240 4241 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4242 4243 sinfo->AllocationSize = cpu_to_le64(4096); 4244 sinfo->EndOfFile = cpu_to_le64(0); 4245 sinfo->NumberOfLinks = cpu_to_le32(1); 4246 sinfo->DeletePending = 1; 4247 sinfo->Directory = 0; 4248 rsp->OutputBufferLength = 4249 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4250} 4251 4252static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, 4253 void *rsp_org) 4254{ 4255 struct smb2_file_internal_info *file_info; 4256 4257 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4258 4259 /* any unique number */ 4260 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); 4261 rsp->OutputBufferLength = 4262 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4263} 4264 4265static int smb2_get_info_file_pipe(struct ksmbd_session *sess, 4266 struct smb2_query_info_req *req, 4267 struct smb2_query_info_rsp *rsp, 4268 void *rsp_org) 4269{ 4270 u64 id; 4271 int rc; 4272 4273 /* 4274 * Windows can sometime send query file info request on 4275 * pipe without opening it, checking error condition here 4276 */ 4277 id = req->VolatileFileId; 4278 if (!ksmbd_session_rpc_method(sess, id)) 4279 return -ENOENT; 4280 4281 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", 4282 req->FileInfoClass, req->VolatileFileId); 4283 4284 switch (req->FileInfoClass) { 4285 case FILE_STANDARD_INFORMATION: 4286 get_standard_info_pipe(rsp, rsp_org); 4287 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4288 rsp, rsp_org); 4289 break; 4290 case FILE_INTERNAL_INFORMATION: 4291 get_internal_info_pipe(rsp, id, rsp_org); 4292 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4293 rsp, rsp_org); 4294 break; 4295 default: 4296 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", 4297 req->FileInfoClass); 4298 rc = -EOPNOTSUPP; 4299 } 4300 return rc; 4301} 4302 4303/** 4304 * smb2_get_ea() - handler for smb2 get extended attribute command 4305 * @work: smb work containing query info command buffer 4306 * @fp: ksmbd_file pointer 4307 * @req: get extended attribute request 4308 * @rsp: response buffer pointer 4309 * @rsp_org: base response buffer pointer in case of chained response 4310 * 4311 * Return: 0 on success, otherwise error 4312 */ 4313static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, 4314 struct smb2_query_info_req *req, 4315 struct smb2_query_info_rsp *rsp, void *rsp_org) 4316{ 4317 struct smb2_ea_info *eainfo, *prev_eainfo; 4318 char *name, *ptr, *xattr_list = NULL, *buf; 4319 int rc, name_len, value_len, xattr_list_len, idx; 4320 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; 4321 struct smb2_ea_info_req *ea_req = NULL; 4322 const struct path *path; 4323 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4324 4325 if (!(fp->daccess & FILE_READ_EA_LE)) { 4326 pr_err("Not permitted to read ext attr : 0x%x\n", 4327 fp->daccess); 4328 return -EACCES; 4329 } 4330 4331 path = &fp->filp->f_path; 4332 /* single EA entry is requested with given user.* name */ 4333 if (req->InputBufferLength) { 4334 if (le32_to_cpu(req->InputBufferLength) < 4335 sizeof(struct smb2_ea_info_req)) 4336 return -EINVAL; 4337 4338 ea_req = (struct smb2_ea_info_req *)req->Buffer; 4339 } else { 4340 /* need to send all EAs, if no specific EA is requested*/ 4341 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) 4342 ksmbd_debug(SMB, 4343 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", 4344 le32_to_cpu(req->Flags)); 4345 } 4346 4347 buf_free_len = 4348 smb2_calc_max_out_buf_len(work, 8, 4349 le32_to_cpu(req->OutputBufferLength)); 4350 if (buf_free_len < 0) 4351 return -EINVAL; 4352 4353 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4354 if (rc < 0) { 4355 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4356 goto out; 4357 } else if (!rc) { /* there is no EA in the file */ 4358 ksmbd_debug(SMB, "no ea data in the file\n"); 4359 goto done; 4360 } 4361 xattr_list_len = rc; 4362 4363 ptr = (char *)rsp->Buffer; 4364 eainfo = (struct smb2_ea_info *)ptr; 4365 prev_eainfo = eainfo; 4366 idx = 0; 4367 4368 while (idx < xattr_list_len) { 4369 name = xattr_list + idx; 4370 name_len = strlen(name); 4371 4372 ksmbd_debug(SMB, "%s, len %d\n", name, name_len); 4373 idx += name_len + 1; 4374 4375 /* 4376 * CIFS does not support EA other than user.* namespace, 4377 * still keep the framework generic, to list other attrs 4378 * in future. 4379 */ 4380 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4381 continue; 4382 4383 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, 4384 STREAM_PREFIX_LEN)) 4385 continue; 4386 4387 if (req->InputBufferLength && 4388 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, 4389 ea_req->EaNameLength)) 4390 continue; 4391 4392 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], 4393 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) 4394 continue; 4395 4396 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4397 name_len -= XATTR_USER_PREFIX_LEN; 4398 4399 ptr = eainfo->name + name_len + 1; 4400 buf_free_len -= (offsetof(struct smb2_ea_info, name) + 4401 name_len + 1); 4402 /* bailout if xattr can't fit in buf_free_len */ 4403 value_len = ksmbd_vfs_getxattr(idmap, path->dentry, 4404 name, &buf); 4405 if (value_len <= 0) { 4406 rc = -ENOENT; 4407 rsp->hdr.Status = STATUS_INVALID_HANDLE; 4408 goto out; 4409 } 4410 4411 buf_free_len -= value_len; 4412 if (buf_free_len < 0) { 4413 kfree(buf); 4414 break; 4415 } 4416 4417 memcpy(ptr, buf, value_len); 4418 kfree(buf); 4419 4420 ptr += value_len; 4421 eainfo->Flags = 0; 4422 eainfo->EaNameLength = name_len; 4423 4424 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 4425 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], 4426 name_len); 4427 else 4428 memcpy(eainfo->name, name, name_len); 4429 4430 eainfo->name[name_len] = '\0'; 4431 eainfo->EaValueLength = cpu_to_le16(value_len); 4432 next_offset = offsetof(struct smb2_ea_info, name) + 4433 name_len + 1 + value_len; 4434 4435 /* align next xattr entry at 4 byte bundary */ 4436 alignment_bytes = ((next_offset + 3) & ~3) - next_offset; 4437 if (alignment_bytes) { 4438 memset(ptr, '\0', alignment_bytes); 4439 ptr += alignment_bytes; 4440 next_offset += alignment_bytes; 4441 buf_free_len -= alignment_bytes; 4442 } 4443 eainfo->NextEntryOffset = cpu_to_le32(next_offset); 4444 prev_eainfo = eainfo; 4445 eainfo = (struct smb2_ea_info *)ptr; 4446 rsp_data_cnt += next_offset; 4447 4448 if (req->InputBufferLength) { 4449 ksmbd_debug(SMB, "single entry requested\n"); 4450 break; 4451 } 4452 } 4453 4454 /* no more ea entries */ 4455 prev_eainfo->NextEntryOffset = 0; 4456done: 4457 rc = 0; 4458 if (rsp_data_cnt == 0) 4459 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; 4460 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); 4461out: 4462 kvfree(xattr_list); 4463 return rc; 4464} 4465 4466static void get_file_access_info(struct smb2_query_info_rsp *rsp, 4467 struct ksmbd_file *fp, void *rsp_org) 4468{ 4469 struct smb2_file_access_info *file_info; 4470 4471 file_info = (struct smb2_file_access_info *)rsp->Buffer; 4472 file_info->AccessFlags = fp->daccess; 4473 rsp->OutputBufferLength = 4474 cpu_to_le32(sizeof(struct smb2_file_access_info)); 4475} 4476 4477static int get_file_basic_info(struct smb2_query_info_rsp *rsp, 4478 struct ksmbd_file *fp, void *rsp_org) 4479{ 4480 struct smb2_file_basic_info *basic_info; 4481 struct kstat stat; 4482 u64 time; 4483 4484 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4485 pr_err("no right to read the attributes : 0x%x\n", 4486 fp->daccess); 4487 return -EACCES; 4488 } 4489 4490 basic_info = (struct smb2_file_basic_info *)rsp->Buffer; 4491 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4492 file_inode(fp->filp), &stat); 4493 basic_info->CreationTime = cpu_to_le64(fp->create_time); 4494 time = ksmbd_UnixTimeToNT(stat.atime); 4495 basic_info->LastAccessTime = cpu_to_le64(time); 4496 time = ksmbd_UnixTimeToNT(stat.mtime); 4497 basic_info->LastWriteTime = cpu_to_le64(time); 4498 time = ksmbd_UnixTimeToNT(stat.ctime); 4499 basic_info->ChangeTime = cpu_to_le64(time); 4500 basic_info->Attributes = fp->f_ci->m_fattr; 4501 basic_info->Pad1 = 0; 4502 rsp->OutputBufferLength = 4503 cpu_to_le32(sizeof(struct smb2_file_basic_info)); 4504 return 0; 4505} 4506 4507static void get_file_standard_info(struct smb2_query_info_rsp *rsp, 4508 struct ksmbd_file *fp, void *rsp_org) 4509{ 4510 struct smb2_file_standard_info *sinfo; 4511 unsigned int delete_pending; 4512 struct inode *inode; 4513 struct kstat stat; 4514 4515 inode = file_inode(fp->filp); 4516 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat); 4517 4518 sinfo = (struct smb2_file_standard_info *)rsp->Buffer; 4519 delete_pending = ksmbd_inode_pending_delete(fp); 4520 4521 sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4522 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4523 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); 4524 sinfo->DeletePending = delete_pending; 4525 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4526 rsp->OutputBufferLength = 4527 cpu_to_le32(sizeof(struct smb2_file_standard_info)); 4528} 4529 4530static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, 4531 void *rsp_org) 4532{ 4533 struct smb2_file_alignment_info *file_info; 4534 4535 file_info = (struct smb2_file_alignment_info *)rsp->Buffer; 4536 file_info->AlignmentRequirement = 0; 4537 rsp->OutputBufferLength = 4538 cpu_to_le32(sizeof(struct smb2_file_alignment_info)); 4539} 4540 4541static int get_file_all_info(struct ksmbd_work *work, 4542 struct smb2_query_info_rsp *rsp, 4543 struct ksmbd_file *fp, 4544 void *rsp_org) 4545{ 4546 struct ksmbd_conn *conn = work->conn; 4547 struct smb2_file_all_info *file_info; 4548 unsigned int delete_pending; 4549 struct inode *inode; 4550 struct kstat stat; 4551 int conv_len; 4552 char *filename; 4553 u64 time; 4554 4555 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4556 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", 4557 fp->daccess); 4558 return -EACCES; 4559 } 4560 4561 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); 4562 if (IS_ERR(filename)) 4563 return PTR_ERR(filename); 4564 4565 inode = file_inode(fp->filp); 4566 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat); 4567 4568 ksmbd_debug(SMB, "filename = %s\n", filename); 4569 delete_pending = ksmbd_inode_pending_delete(fp); 4570 file_info = (struct smb2_file_all_info *)rsp->Buffer; 4571 4572 file_info->CreationTime = cpu_to_le64(fp->create_time); 4573 time = ksmbd_UnixTimeToNT(stat.atime); 4574 file_info->LastAccessTime = cpu_to_le64(time); 4575 time = ksmbd_UnixTimeToNT(stat.mtime); 4576 file_info->LastWriteTime = cpu_to_le64(time); 4577 time = ksmbd_UnixTimeToNT(stat.ctime); 4578 file_info->ChangeTime = cpu_to_le64(time); 4579 file_info->Attributes = fp->f_ci->m_fattr; 4580 file_info->Pad1 = 0; 4581 file_info->AllocationSize = 4582 cpu_to_le64(inode->i_blocks << 9); 4583 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4584 file_info->NumberOfLinks = 4585 cpu_to_le32(get_nlink(&stat) - delete_pending); 4586 file_info->DeletePending = delete_pending; 4587 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; 4588 file_info->Pad2 = 0; 4589 file_info->IndexNumber = cpu_to_le64(stat.ino); 4590 file_info->EASize = 0; 4591 file_info->AccessFlags = fp->daccess; 4592 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4593 file_info->Mode = fp->coption; 4594 file_info->AlignmentRequirement = 0; 4595 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, 4596 PATH_MAX, conn->local_nls, 0); 4597 conv_len *= 2; 4598 file_info->FileNameLength = cpu_to_le32(conv_len); 4599 rsp->OutputBufferLength = 4600 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); 4601 kfree(filename); 4602 return 0; 4603} 4604 4605static void get_file_alternate_info(struct ksmbd_work *work, 4606 struct smb2_query_info_rsp *rsp, 4607 struct ksmbd_file *fp, 4608 void *rsp_org) 4609{ 4610 struct ksmbd_conn *conn = work->conn; 4611 struct smb2_file_alt_name_info *file_info; 4612 struct dentry *dentry = fp->filp->f_path.dentry; 4613 int conv_len; 4614 4615 spin_lock(&dentry->d_lock); 4616 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; 4617 conv_len = ksmbd_extract_shortname(conn, 4618 dentry->d_name.name, 4619 file_info->FileName); 4620 spin_unlock(&dentry->d_lock); 4621 file_info->FileNameLength = cpu_to_le32(conv_len); 4622 rsp->OutputBufferLength = 4623 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); 4624} 4625 4626static void get_file_stream_info(struct ksmbd_work *work, 4627 struct smb2_query_info_rsp *rsp, 4628 struct ksmbd_file *fp, 4629 void *rsp_org) 4630{ 4631 struct ksmbd_conn *conn = work->conn; 4632 struct smb2_file_stream_info *file_info; 4633 char *stream_name, *xattr_list = NULL, *stream_buf; 4634 struct kstat stat; 4635 const struct path *path = &fp->filp->f_path; 4636 ssize_t xattr_list_len; 4637 int nbytes = 0, streamlen, stream_name_len, next, idx = 0; 4638 int buf_free_len; 4639 struct smb2_query_info_req *req = ksmbd_req_buf_next(work); 4640 4641 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4642 file_inode(fp->filp), &stat); 4643 file_info = (struct smb2_file_stream_info *)rsp->Buffer; 4644 4645 buf_free_len = 4646 smb2_calc_max_out_buf_len(work, 8, 4647 le32_to_cpu(req->OutputBufferLength)); 4648 if (buf_free_len < 0) 4649 goto out; 4650 4651 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); 4652 if (xattr_list_len < 0) { 4653 goto out; 4654 } else if (!xattr_list_len) { 4655 ksmbd_debug(SMB, "empty xattr in the file\n"); 4656 goto out; 4657 } 4658 4659 while (idx < xattr_list_len) { 4660 stream_name = xattr_list + idx; 4661 streamlen = strlen(stream_name); 4662 idx += streamlen + 1; 4663 4664 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); 4665 4666 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], 4667 STREAM_PREFIX, STREAM_PREFIX_LEN)) 4668 continue; 4669 4670 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + 4671 STREAM_PREFIX_LEN); 4672 streamlen = stream_name_len; 4673 4674 /* plus : size */ 4675 streamlen += 1; 4676 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); 4677 if (!stream_buf) 4678 break; 4679 4680 streamlen = snprintf(stream_buf, streamlen + 1, 4681 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); 4682 4683 next = sizeof(struct smb2_file_stream_info) + streamlen * 2; 4684 if (next > buf_free_len) { 4685 kfree(stream_buf); 4686 break; 4687 } 4688 4689 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; 4690 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4691 stream_buf, streamlen, 4692 conn->local_nls, 0); 4693 streamlen *= 2; 4694 kfree(stream_buf); 4695 file_info->StreamNameLength = cpu_to_le32(streamlen); 4696 file_info->StreamSize = cpu_to_le64(stream_name_len); 4697 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); 4698 4699 nbytes += next; 4700 buf_free_len -= next; 4701 file_info->NextEntryOffset = cpu_to_le32(next); 4702 } 4703 4704out: 4705 if (!S_ISDIR(stat.mode) && 4706 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { 4707 file_info = (struct smb2_file_stream_info *) 4708 &rsp->Buffer[nbytes]; 4709 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, 4710 "::$DATA", 7, conn->local_nls, 0); 4711 streamlen *= 2; 4712 file_info->StreamNameLength = cpu_to_le32(streamlen); 4713 file_info->StreamSize = cpu_to_le64(stat.size); 4714 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); 4715 nbytes += sizeof(struct smb2_file_stream_info) + streamlen; 4716 } 4717 4718 /* last entry offset should be 0 */ 4719 file_info->NextEntryOffset = 0; 4720 kvfree(xattr_list); 4721 4722 rsp->OutputBufferLength = cpu_to_le32(nbytes); 4723} 4724 4725static void get_file_internal_info(struct smb2_query_info_rsp *rsp, 4726 struct ksmbd_file *fp, void *rsp_org) 4727{ 4728 struct smb2_file_internal_info *file_info; 4729 struct kstat stat; 4730 4731 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4732 file_inode(fp->filp), &stat); 4733 file_info = (struct smb2_file_internal_info *)rsp->Buffer; 4734 file_info->IndexNumber = cpu_to_le64(stat.ino); 4735 rsp->OutputBufferLength = 4736 cpu_to_le32(sizeof(struct smb2_file_internal_info)); 4737} 4738 4739static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, 4740 struct ksmbd_file *fp, void *rsp_org) 4741{ 4742 struct smb2_file_ntwrk_info *file_info; 4743 struct inode *inode; 4744 struct kstat stat; 4745 u64 time; 4746 4747 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4748 pr_err("no right to read the attributes : 0x%x\n", 4749 fp->daccess); 4750 return -EACCES; 4751 } 4752 4753 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; 4754 4755 inode = file_inode(fp->filp); 4756 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat); 4757 4758 file_info->CreationTime = cpu_to_le64(fp->create_time); 4759 time = ksmbd_UnixTimeToNT(stat.atime); 4760 file_info->LastAccessTime = cpu_to_le64(time); 4761 time = ksmbd_UnixTimeToNT(stat.mtime); 4762 file_info->LastWriteTime = cpu_to_le64(time); 4763 time = ksmbd_UnixTimeToNT(stat.ctime); 4764 file_info->ChangeTime = cpu_to_le64(time); 4765 file_info->Attributes = fp->f_ci->m_fattr; 4766 file_info->AllocationSize = 4767 cpu_to_le64(inode->i_blocks << 9); 4768 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); 4769 file_info->Reserved = cpu_to_le32(0); 4770 rsp->OutputBufferLength = 4771 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); 4772 return 0; 4773} 4774 4775static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) 4776{ 4777 struct smb2_file_ea_info *file_info; 4778 4779 file_info = (struct smb2_file_ea_info *)rsp->Buffer; 4780 file_info->EASize = 0; 4781 rsp->OutputBufferLength = 4782 cpu_to_le32(sizeof(struct smb2_file_ea_info)); 4783} 4784 4785static void get_file_position_info(struct smb2_query_info_rsp *rsp, 4786 struct ksmbd_file *fp, void *rsp_org) 4787{ 4788 struct smb2_file_pos_info *file_info; 4789 4790 file_info = (struct smb2_file_pos_info *)rsp->Buffer; 4791 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); 4792 rsp->OutputBufferLength = 4793 cpu_to_le32(sizeof(struct smb2_file_pos_info)); 4794} 4795 4796static void get_file_mode_info(struct smb2_query_info_rsp *rsp, 4797 struct ksmbd_file *fp, void *rsp_org) 4798{ 4799 struct smb2_file_mode_info *file_info; 4800 4801 file_info = (struct smb2_file_mode_info *)rsp->Buffer; 4802 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; 4803 rsp->OutputBufferLength = 4804 cpu_to_le32(sizeof(struct smb2_file_mode_info)); 4805} 4806 4807static void get_file_compression_info(struct smb2_query_info_rsp *rsp, 4808 struct ksmbd_file *fp, void *rsp_org) 4809{ 4810 struct smb2_file_comp_info *file_info; 4811 struct kstat stat; 4812 4813 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, 4814 file_inode(fp->filp), &stat); 4815 4816 file_info = (struct smb2_file_comp_info *)rsp->Buffer; 4817 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); 4818 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; 4819 file_info->CompressionUnitShift = 0; 4820 file_info->ChunkShift = 0; 4821 file_info->ClusterShift = 0; 4822 memset(&file_info->Reserved[0], 0, 3); 4823 4824 rsp->OutputBufferLength = 4825 cpu_to_le32(sizeof(struct smb2_file_comp_info)); 4826} 4827 4828static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, 4829 struct ksmbd_file *fp, void *rsp_org) 4830{ 4831 struct smb2_file_attr_tag_info *file_info; 4832 4833 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { 4834 pr_err("no right to read the attributes : 0x%x\n", 4835 fp->daccess); 4836 return -EACCES; 4837 } 4838 4839 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; 4840 file_info->FileAttributes = fp->f_ci->m_fattr; 4841 file_info->ReparseTag = 0; 4842 rsp->OutputBufferLength = 4843 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); 4844 return 0; 4845} 4846 4847static void find_file_posix_info(struct smb2_query_info_rsp *rsp, 4848 struct ksmbd_file *fp, void *rsp_org) 4849{ 4850 struct smb311_posix_qinfo *file_info; 4851 struct inode *inode = file_inode(fp->filp); 4852 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); 4853 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); 4854 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); 4855 u64 time; 4856 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; 4857 4858 file_info = (struct smb311_posix_qinfo *)rsp->Buffer; 4859 file_info->CreationTime = cpu_to_le64(fp->create_time); 4860 time = ksmbd_UnixTimeToNT(inode_get_atime(inode)); 4861 file_info->LastAccessTime = cpu_to_le64(time); 4862 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode)); 4863 file_info->LastWriteTime = cpu_to_le64(time); 4864 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode)); 4865 file_info->ChangeTime = cpu_to_le64(time); 4866 file_info->DosAttributes = fp->f_ci->m_fattr; 4867 file_info->Inode = cpu_to_le64(inode->i_ino); 4868 file_info->EndOfFile = cpu_to_le64(inode->i_size); 4869 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9); 4870 file_info->HardLinks = cpu_to_le32(inode->i_nlink); 4871 file_info->Mode = cpu_to_le32(inode->i_mode & 0777); 4872 file_info->DeviceId = cpu_to_le32(inode->i_rdev); 4873 4874 /* 4875 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). 4876 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + 4877 * sub_auth(4 * 1(num_subauth)) + RID(4). 4878 */ 4879 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), 4880 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); 4881 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), 4882 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); 4883 4884 rsp->OutputBufferLength = cpu_to_le32(out_buf_len); 4885} 4886 4887static int smb2_get_info_file(struct ksmbd_work *work, 4888 struct smb2_query_info_req *req, 4889 struct smb2_query_info_rsp *rsp) 4890{ 4891 struct ksmbd_file *fp; 4892 int fileinfoclass = 0; 4893 int rc = 0; 4894 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 4895 4896 if (test_share_config_flag(work->tcon->share_conf, 4897 KSMBD_SHARE_FLAG_PIPE)) { 4898 /* smb2 info file called for pipe */ 4899 return smb2_get_info_file_pipe(work->sess, req, rsp, 4900 work->response_buf); 4901 } 4902 4903 if (work->next_smb2_rcv_hdr_off) { 4904 if (!has_file_id(req->VolatileFileId)) { 4905 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 4906 work->compound_fid); 4907 id = work->compound_fid; 4908 pid = work->compound_pfid; 4909 } 4910 } 4911 4912 if (!has_file_id(id)) { 4913 id = req->VolatileFileId; 4914 pid = req->PersistentFileId; 4915 } 4916 4917 fp = ksmbd_lookup_fd_slow(work, id, pid); 4918 if (!fp) 4919 return -ENOENT; 4920 4921 fileinfoclass = req->FileInfoClass; 4922 4923 switch (fileinfoclass) { 4924 case FILE_ACCESS_INFORMATION: 4925 get_file_access_info(rsp, fp, work->response_buf); 4926 break; 4927 4928 case FILE_BASIC_INFORMATION: 4929 rc = get_file_basic_info(rsp, fp, work->response_buf); 4930 break; 4931 4932 case FILE_STANDARD_INFORMATION: 4933 get_file_standard_info(rsp, fp, work->response_buf); 4934 break; 4935 4936 case FILE_ALIGNMENT_INFORMATION: 4937 get_file_alignment_info(rsp, work->response_buf); 4938 break; 4939 4940 case FILE_ALL_INFORMATION: 4941 rc = get_file_all_info(work, rsp, fp, work->response_buf); 4942 break; 4943 4944 case FILE_ALTERNATE_NAME_INFORMATION: 4945 get_file_alternate_info(work, rsp, fp, work->response_buf); 4946 break; 4947 4948 case FILE_STREAM_INFORMATION: 4949 get_file_stream_info(work, rsp, fp, work->response_buf); 4950 break; 4951 4952 case FILE_INTERNAL_INFORMATION: 4953 get_file_internal_info(rsp, fp, work->response_buf); 4954 break; 4955 4956 case FILE_NETWORK_OPEN_INFORMATION: 4957 rc = get_file_network_open_info(rsp, fp, work->response_buf); 4958 break; 4959 4960 case FILE_EA_INFORMATION: 4961 get_file_ea_info(rsp, work->response_buf); 4962 break; 4963 4964 case FILE_FULL_EA_INFORMATION: 4965 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); 4966 break; 4967 4968 case FILE_POSITION_INFORMATION: 4969 get_file_position_info(rsp, fp, work->response_buf); 4970 break; 4971 4972 case FILE_MODE_INFORMATION: 4973 get_file_mode_info(rsp, fp, work->response_buf); 4974 break; 4975 4976 case FILE_COMPRESSION_INFORMATION: 4977 get_file_compression_info(rsp, fp, work->response_buf); 4978 break; 4979 4980 case FILE_ATTRIBUTE_TAG_INFORMATION: 4981 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); 4982 break; 4983 case SMB_FIND_FILE_POSIX_INFO: 4984 if (!work->tcon->posix_extensions) { 4985 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 4986 rc = -EOPNOTSUPP; 4987 } else { 4988 find_file_posix_info(rsp, fp, work->response_buf); 4989 } 4990 break; 4991 default: 4992 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", 4993 fileinfoclass); 4994 rc = -EOPNOTSUPP; 4995 } 4996 if (!rc) 4997 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 4998 rsp, work->response_buf); 4999 ksmbd_fd_put(work, fp); 5000 return rc; 5001} 5002 5003static int smb2_get_info_filesystem(struct ksmbd_work *work, 5004 struct smb2_query_info_req *req, 5005 struct smb2_query_info_rsp *rsp) 5006{ 5007 struct ksmbd_session *sess = work->sess; 5008 struct ksmbd_conn *conn = work->conn; 5009 struct ksmbd_share_config *share = work->tcon->share_conf; 5010 int fsinfoclass = 0; 5011 struct kstatfs stfs; 5012 struct path path; 5013 int rc = 0, len; 5014 5015 if (!share->path) 5016 return -EIO; 5017 5018 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); 5019 if (rc) { 5020 pr_err("cannot create vfs path\n"); 5021 return -EIO; 5022 } 5023 5024 rc = vfs_statfs(&path, &stfs); 5025 if (rc) { 5026 pr_err("cannot do stat of path %s\n", share->path); 5027 path_put(&path); 5028 return -EIO; 5029 } 5030 5031 fsinfoclass = req->FileInfoClass; 5032 5033 switch (fsinfoclass) { 5034 case FS_DEVICE_INFORMATION: 5035 { 5036 struct filesystem_device_info *info; 5037 5038 info = (struct filesystem_device_info *)rsp->Buffer; 5039 5040 info->DeviceType = cpu_to_le32(stfs.f_type); 5041 info->DeviceCharacteristics = cpu_to_le32(0x00000020); 5042 rsp->OutputBufferLength = cpu_to_le32(8); 5043 break; 5044 } 5045 case FS_ATTRIBUTE_INFORMATION: 5046 { 5047 struct filesystem_attribute_info *info; 5048 size_t sz; 5049 5050 info = (struct filesystem_attribute_info *)rsp->Buffer; 5051 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | 5052 FILE_PERSISTENT_ACLS | 5053 FILE_UNICODE_ON_DISK | 5054 FILE_CASE_PRESERVED_NAMES | 5055 FILE_CASE_SENSITIVE_SEARCH | 5056 FILE_SUPPORTS_BLOCK_REFCOUNTING); 5057 5058 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); 5059 5060 if (test_share_config_flag(work->tcon->share_conf, 5061 KSMBD_SHARE_FLAG_STREAMS)) 5062 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); 5063 5064 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); 5065 len = smbConvertToUTF16((__le16 *)info->FileSystemName, 5066 "NTFS", PATH_MAX, conn->local_nls, 0); 5067 len = len * 2; 5068 info->FileSystemNameLen = cpu_to_le32(len); 5069 sz = sizeof(struct filesystem_attribute_info) - 2 + len; 5070 rsp->OutputBufferLength = cpu_to_le32(sz); 5071 break; 5072 } 5073 case FS_VOLUME_INFORMATION: 5074 { 5075 struct filesystem_vol_info *info; 5076 size_t sz; 5077 unsigned int serial_crc = 0; 5078 5079 info = (struct filesystem_vol_info *)(rsp->Buffer); 5080 info->VolumeCreationTime = 0; 5081 serial_crc = crc32_le(serial_crc, share->name, 5082 strlen(share->name)); 5083 serial_crc = crc32_le(serial_crc, share->path, 5084 strlen(share->path)); 5085 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), 5086 strlen(ksmbd_netbios_name())); 5087 /* Taking dummy value of serial number*/ 5088 info->SerialNumber = cpu_to_le32(serial_crc); 5089 len = smbConvertToUTF16((__le16 *)info->VolumeLabel, 5090 share->name, PATH_MAX, 5091 conn->local_nls, 0); 5092 len = len * 2; 5093 info->VolumeLabelSize = cpu_to_le32(len); 5094 info->Reserved = 0; 5095 sz = sizeof(struct filesystem_vol_info) - 2 + len; 5096 rsp->OutputBufferLength = cpu_to_le32(sz); 5097 break; 5098 } 5099 case FS_SIZE_INFORMATION: 5100 { 5101 struct filesystem_info *info; 5102 5103 info = (struct filesystem_info *)(rsp->Buffer); 5104 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5105 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); 5106 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5107 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5108 rsp->OutputBufferLength = cpu_to_le32(24); 5109 break; 5110 } 5111 case FS_FULL_SIZE_INFORMATION: 5112 { 5113 struct smb2_fs_full_size_info *info; 5114 5115 info = (struct smb2_fs_full_size_info *)(rsp->Buffer); 5116 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); 5117 info->CallerAvailableAllocationUnits = 5118 cpu_to_le64(stfs.f_bavail); 5119 info->ActualAvailableAllocationUnits = 5120 cpu_to_le64(stfs.f_bfree); 5121 info->SectorsPerAllocationUnit = cpu_to_le32(1); 5122 info->BytesPerSector = cpu_to_le32(stfs.f_bsize); 5123 rsp->OutputBufferLength = cpu_to_le32(32); 5124 break; 5125 } 5126 case FS_OBJECT_ID_INFORMATION: 5127 { 5128 struct object_id_info *info; 5129 5130 info = (struct object_id_info *)(rsp->Buffer); 5131 5132 if (!user_guest(sess->user)) 5133 memcpy(info->objid, user_passkey(sess->user), 16); 5134 else 5135 memset(info->objid, 0, 16); 5136 5137 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); 5138 info->extended_info.version = cpu_to_le32(1); 5139 info->extended_info.release = cpu_to_le32(1); 5140 info->extended_info.rel_date = 0; 5141 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); 5142 rsp->OutputBufferLength = cpu_to_le32(64); 5143 break; 5144 } 5145 case FS_SECTOR_SIZE_INFORMATION: 5146 { 5147 struct smb3_fs_ss_info *info; 5148 unsigned int sector_size = 5149 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); 5150 5151 info = (struct smb3_fs_ss_info *)(rsp->Buffer); 5152 5153 info->LogicalBytesPerSector = cpu_to_le32(sector_size); 5154 info->PhysicalBytesPerSectorForAtomicity = 5155 cpu_to_le32(sector_size); 5156 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); 5157 info->FSEffPhysicalBytesPerSectorForAtomicity = 5158 cpu_to_le32(sector_size); 5159 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | 5160 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); 5161 info->ByteOffsetForSectorAlignment = 0; 5162 info->ByteOffsetForPartitionAlignment = 0; 5163 rsp->OutputBufferLength = cpu_to_le32(28); 5164 break; 5165 } 5166 case FS_CONTROL_INFORMATION: 5167 { 5168 /* 5169 * TODO : The current implementation is based on 5170 * test result with win7(NTFS) server. It's need to 5171 * modify this to get valid Quota values 5172 * from Linux kernel 5173 */ 5174 struct smb2_fs_control_info *info; 5175 5176 info = (struct smb2_fs_control_info *)(rsp->Buffer); 5177 info->FreeSpaceStartFiltering = 0; 5178 info->FreeSpaceThreshold = 0; 5179 info->FreeSpaceStopFiltering = 0; 5180 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); 5181 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); 5182 info->Padding = 0; 5183 rsp->OutputBufferLength = cpu_to_le32(48); 5184 break; 5185 } 5186 case FS_POSIX_INFORMATION: 5187 { 5188 struct filesystem_posix_info *info; 5189 5190 if (!work->tcon->posix_extensions) { 5191 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); 5192 rc = -EOPNOTSUPP; 5193 } else { 5194 info = (struct filesystem_posix_info *)(rsp->Buffer); 5195 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); 5196 info->BlockSize = cpu_to_le32(stfs.f_bsize); 5197 info->TotalBlocks = cpu_to_le64(stfs.f_blocks); 5198 info->BlocksAvail = cpu_to_le64(stfs.f_bfree); 5199 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); 5200 info->TotalFileNodes = cpu_to_le64(stfs.f_files); 5201 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); 5202 rsp->OutputBufferLength = cpu_to_le32(56); 5203 } 5204 break; 5205 } 5206 default: 5207 path_put(&path); 5208 return -EOPNOTSUPP; 5209 } 5210 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), 5211 rsp, work->response_buf); 5212 path_put(&path); 5213 return rc; 5214} 5215 5216static int smb2_get_info_sec(struct ksmbd_work *work, 5217 struct smb2_query_info_req *req, 5218 struct smb2_query_info_rsp *rsp) 5219{ 5220 struct ksmbd_file *fp; 5221 struct mnt_idmap *idmap; 5222 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; 5223 struct smb_fattr fattr = {{0}}; 5224 struct inode *inode; 5225 __u32 secdesclen = 0; 5226 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 5227 int addition_info = le32_to_cpu(req->AdditionalInformation); 5228 int rc = 0, ppntsd_size = 0; 5229 5230 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | 5231 PROTECTED_DACL_SECINFO | 5232 UNPROTECTED_DACL_SECINFO)) { 5233 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", 5234 addition_info); 5235 5236 pntsd->revision = cpu_to_le16(1); 5237 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); 5238 pntsd->osidoffset = 0; 5239 pntsd->gsidoffset = 0; 5240 pntsd->sacloffset = 0; 5241 pntsd->dacloffset = 0; 5242 5243 secdesclen = sizeof(struct smb_ntsd); 5244 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5245 5246 return 0; 5247 } 5248 5249 if (work->next_smb2_rcv_hdr_off) { 5250 if (!has_file_id(req->VolatileFileId)) { 5251 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 5252 work->compound_fid); 5253 id = work->compound_fid; 5254 pid = work->compound_pfid; 5255 } 5256 } 5257 5258 if (!has_file_id(id)) { 5259 id = req->VolatileFileId; 5260 pid = req->PersistentFileId; 5261 } 5262 5263 fp = ksmbd_lookup_fd_slow(work, id, pid); 5264 if (!fp) 5265 return -ENOENT; 5266 5267 idmap = file_mnt_idmap(fp->filp); 5268 inode = file_inode(fp->filp); 5269 ksmbd_acls_fattr(&fattr, idmap, inode); 5270 5271 if (test_share_config_flag(work->tcon->share_conf, 5272 KSMBD_SHARE_FLAG_ACL_XATTR)) 5273 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, 5274 fp->filp->f_path.dentry, 5275 &ppntsd); 5276 5277 /* Check if sd buffer size exceeds response buffer size */ 5278 if (smb2_resp_buf_len(work, 8) > ppntsd_size) 5279 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, 5280 addition_info, &secdesclen, &fattr); 5281 posix_acl_release(fattr.cf_acls); 5282 posix_acl_release(fattr.cf_dacls); 5283 kfree(ppntsd); 5284 ksmbd_fd_put(work, fp); 5285 if (rc) 5286 return rc; 5287 5288 rsp->OutputBufferLength = cpu_to_le32(secdesclen); 5289 return 0; 5290} 5291 5292/** 5293 * smb2_query_info() - handler for smb2 query info command 5294 * @work: smb work containing query info request buffer 5295 * 5296 * Return: 0 on success, otherwise error 5297 */ 5298int smb2_query_info(struct ksmbd_work *work) 5299{ 5300 struct smb2_query_info_req *req; 5301 struct smb2_query_info_rsp *rsp; 5302 int rc = 0; 5303 5304 WORK_BUFFERS(work, req, rsp); 5305 5306 ksmbd_debug(SMB, "GOT query info request\n"); 5307 5308 switch (req->InfoType) { 5309 case SMB2_O_INFO_FILE: 5310 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 5311 rc = smb2_get_info_file(work, req, rsp); 5312 break; 5313 case SMB2_O_INFO_FILESYSTEM: 5314 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); 5315 rc = smb2_get_info_filesystem(work, req, rsp); 5316 break; 5317 case SMB2_O_INFO_SECURITY: 5318 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 5319 rc = smb2_get_info_sec(work, req, rsp); 5320 break; 5321 default: 5322 ksmbd_debug(SMB, "InfoType %d not supported yet\n", 5323 req->InfoType); 5324 rc = -EOPNOTSUPP; 5325 } 5326 5327 if (!rc) { 5328 rsp->StructureSize = cpu_to_le16(9); 5329 rsp->OutputBufferOffset = cpu_to_le16(72); 5330 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 5331 offsetof(struct smb2_query_info_rsp, Buffer) + 5332 le32_to_cpu(rsp->OutputBufferLength)); 5333 } 5334 5335 if (rc < 0) { 5336 if (rc == -EACCES) 5337 rsp->hdr.Status = STATUS_ACCESS_DENIED; 5338 else if (rc == -ENOENT) 5339 rsp->hdr.Status = STATUS_FILE_CLOSED; 5340 else if (rc == -EIO) 5341 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 5342 else if (rc == -ENOMEM) 5343 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 5344 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) 5345 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 5346 smb2_set_err_rsp(work); 5347 5348 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", 5349 rc); 5350 return rc; 5351 } 5352 return 0; 5353} 5354 5355/** 5356 * smb2_close_pipe() - handler for closing IPC pipe 5357 * @work: smb work containing close request buffer 5358 * 5359 * Return: 0 5360 */ 5361static noinline int smb2_close_pipe(struct ksmbd_work *work) 5362{ 5363 u64 id; 5364 struct smb2_close_req *req; 5365 struct smb2_close_rsp *rsp; 5366 5367 WORK_BUFFERS(work, req, rsp); 5368 5369 id = req->VolatileFileId; 5370 ksmbd_session_rpc_close(work->sess, id); 5371 5372 rsp->StructureSize = cpu_to_le16(60); 5373 rsp->Flags = 0; 5374 rsp->Reserved = 0; 5375 rsp->CreationTime = 0; 5376 rsp->LastAccessTime = 0; 5377 rsp->LastWriteTime = 0; 5378 rsp->ChangeTime = 0; 5379 rsp->AllocationSize = 0; 5380 rsp->EndOfFile = 0; 5381 rsp->Attributes = 0; 5382 5383 return ksmbd_iov_pin_rsp(work, (void *)rsp, 5384 sizeof(struct smb2_close_rsp)); 5385} 5386 5387/** 5388 * smb2_close() - handler for smb2 close file command 5389 * @work: smb work containing close request buffer 5390 * 5391 * Return: 0 5392 */ 5393int smb2_close(struct ksmbd_work *work) 5394{ 5395 u64 volatile_id = KSMBD_NO_FID; 5396 u64 sess_id; 5397 struct smb2_close_req *req; 5398 struct smb2_close_rsp *rsp; 5399 struct ksmbd_conn *conn = work->conn; 5400 struct ksmbd_file *fp; 5401 struct inode *inode; 5402 u64 time; 5403 int err = 0; 5404 5405 WORK_BUFFERS(work, req, rsp); 5406 5407 if (test_share_config_flag(work->tcon->share_conf, 5408 KSMBD_SHARE_FLAG_PIPE)) { 5409 ksmbd_debug(SMB, "IPC pipe close request\n"); 5410 return smb2_close_pipe(work); 5411 } 5412 5413 sess_id = le64_to_cpu(req->hdr.SessionId); 5414 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5415 sess_id = work->compound_sid; 5416 5417 work->compound_sid = 0; 5418 if (check_session_id(conn, sess_id)) { 5419 work->compound_sid = sess_id; 5420 } else { 5421 rsp->hdr.Status = STATUS_USER_SESSION_DELETED; 5422 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) 5423 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 5424 err = -EBADF; 5425 goto out; 5426 } 5427 5428 if (work->next_smb2_rcv_hdr_off && 5429 !has_file_id(req->VolatileFileId)) { 5430 if (!has_file_id(work->compound_fid)) { 5431 /* file already closed, return FILE_CLOSED */ 5432 ksmbd_debug(SMB, "file already closed\n"); 5433 rsp->hdr.Status = STATUS_FILE_CLOSED; 5434 err = -EBADF; 5435 goto out; 5436 } else { 5437 ksmbd_debug(SMB, 5438 "Compound request set FID = %llu:%llu\n", 5439 work->compound_fid, 5440 work->compound_pfid); 5441 volatile_id = work->compound_fid; 5442 5443 /* file closed, stored id is not valid anymore */ 5444 work->compound_fid = KSMBD_NO_FID; 5445 work->compound_pfid = KSMBD_NO_FID; 5446 } 5447 } else { 5448 volatile_id = req->VolatileFileId; 5449 } 5450 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); 5451 5452 rsp->StructureSize = cpu_to_le16(60); 5453 rsp->Reserved = 0; 5454 5455 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { 5456 fp = ksmbd_lookup_fd_fast(work, volatile_id); 5457 if (!fp) { 5458 err = -ENOENT; 5459 goto out; 5460 } 5461 5462 inode = file_inode(fp->filp); 5463 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; 5464 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 : 5465 cpu_to_le64(inode->i_blocks << 9); 5466 rsp->EndOfFile = cpu_to_le64(inode->i_size); 5467 rsp->Attributes = fp->f_ci->m_fattr; 5468 rsp->CreationTime = cpu_to_le64(fp->create_time); 5469 time = ksmbd_UnixTimeToNT(inode_get_atime(inode)); 5470 rsp->LastAccessTime = cpu_to_le64(time); 5471 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode)); 5472 rsp->LastWriteTime = cpu_to_le64(time); 5473 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode)); 5474 rsp->ChangeTime = cpu_to_le64(time); 5475 ksmbd_fd_put(work, fp); 5476 } else { 5477 rsp->Flags = 0; 5478 rsp->AllocationSize = 0; 5479 rsp->EndOfFile = 0; 5480 rsp->Attributes = 0; 5481 rsp->CreationTime = 0; 5482 rsp->LastAccessTime = 0; 5483 rsp->LastWriteTime = 0; 5484 rsp->ChangeTime = 0; 5485 } 5486 5487 err = ksmbd_close_fd(work, volatile_id); 5488out: 5489 if (!err) 5490 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 5491 sizeof(struct smb2_close_rsp)); 5492 5493 if (err) { 5494 if (rsp->hdr.Status == 0) 5495 rsp->hdr.Status = STATUS_FILE_CLOSED; 5496 smb2_set_err_rsp(work); 5497 } 5498 5499 return err; 5500} 5501 5502/** 5503 * smb2_echo() - handler for smb2 echo(ping) command 5504 * @work: smb work containing echo request buffer 5505 * 5506 * Return: 0 5507 */ 5508int smb2_echo(struct ksmbd_work *work) 5509{ 5510 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); 5511 5512 if (work->next_smb2_rcv_hdr_off) 5513 rsp = ksmbd_resp_buf_next(work); 5514 5515 rsp->StructureSize = cpu_to_le16(4); 5516 rsp->Reserved = 0; 5517 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); 5518} 5519 5520static int smb2_rename(struct ksmbd_work *work, 5521 struct ksmbd_file *fp, 5522 struct smb2_file_rename_info *file_info, 5523 struct nls_table *local_nls) 5524{ 5525 struct ksmbd_share_config *share = fp->tcon->share_conf; 5526 char *new_name = NULL; 5527 int rc, flags = 0; 5528 5529 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); 5530 new_name = smb2_get_name(file_info->FileName, 5531 le32_to_cpu(file_info->FileNameLength), 5532 local_nls); 5533 if (IS_ERR(new_name)) 5534 return PTR_ERR(new_name); 5535 5536 if (strchr(new_name, ':')) { 5537 int s_type; 5538 char *xattr_stream_name, *stream_name = NULL; 5539 size_t xattr_stream_size; 5540 int len; 5541 5542 rc = parse_stream_name(new_name, &stream_name, &s_type); 5543 if (rc < 0) 5544 goto out; 5545 5546 len = strlen(new_name); 5547 if (len > 0 && new_name[len - 1] != '/') { 5548 pr_err("not allow base filename in rename\n"); 5549 rc = -ESHARE; 5550 goto out; 5551 } 5552 5553 rc = ksmbd_vfs_xattr_stream_name(stream_name, 5554 &xattr_stream_name, 5555 &xattr_stream_size, 5556 s_type); 5557 if (rc) 5558 goto out; 5559 5560 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), 5561 &fp->filp->f_path, 5562 xattr_stream_name, 5563 NULL, 0, 0, true); 5564 if (rc < 0) { 5565 pr_err("failed to store stream name in xattr: %d\n", 5566 rc); 5567 rc = -EINVAL; 5568 goto out; 5569 } 5570 5571 goto out; 5572 } 5573 5574 ksmbd_debug(SMB, "new name %s\n", new_name); 5575 if (ksmbd_share_veto_filename(share, new_name)) { 5576 rc = -ENOENT; 5577 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); 5578 goto out; 5579 } 5580 5581 if (!file_info->ReplaceIfExists) 5582 flags = RENAME_NOREPLACE; 5583 5584 smb_break_all_levII_oplock(work, fp, 0); 5585 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); 5586out: 5587 kfree(new_name); 5588 return rc; 5589} 5590 5591static int smb2_create_link(struct ksmbd_work *work, 5592 struct ksmbd_share_config *share, 5593 struct smb2_file_link_info *file_info, 5594 unsigned int buf_len, struct file *filp, 5595 struct nls_table *local_nls) 5596{ 5597 char *link_name = NULL, *target_name = NULL, *pathname = NULL; 5598 struct path path, parent_path; 5599 bool file_present = false; 5600 int rc; 5601 5602 if (buf_len < (u64)sizeof(struct smb2_file_link_info) + 5603 le32_to_cpu(file_info->FileNameLength)) 5604 return -EINVAL; 5605 5606 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); 5607 pathname = kmalloc(PATH_MAX, GFP_KERNEL); 5608 if (!pathname) 5609 return -ENOMEM; 5610 5611 link_name = smb2_get_name(file_info->FileName, 5612 le32_to_cpu(file_info->FileNameLength), 5613 local_nls); 5614 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { 5615 rc = -EINVAL; 5616 goto out; 5617 } 5618 5619 ksmbd_debug(SMB, "link name is %s\n", link_name); 5620 target_name = file_path(filp, pathname, PATH_MAX); 5621 if (IS_ERR(target_name)) { 5622 rc = -EINVAL; 5623 goto out; 5624 } 5625 5626 ksmbd_debug(SMB, "target name is %s\n", target_name); 5627 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, 5628 &parent_path, &path, 0); 5629 if (rc) { 5630 if (rc != -ENOENT) 5631 goto out; 5632 } else 5633 file_present = true; 5634 5635 if (file_info->ReplaceIfExists) { 5636 if (file_present) { 5637 rc = ksmbd_vfs_remove_file(work, &path); 5638 if (rc) { 5639 rc = -EINVAL; 5640 ksmbd_debug(SMB, "cannot delete %s\n", 5641 link_name); 5642 goto out; 5643 } 5644 } 5645 } else { 5646 if (file_present) { 5647 rc = -EEXIST; 5648 ksmbd_debug(SMB, "link already exists\n"); 5649 goto out; 5650 } 5651 } 5652 5653 rc = ksmbd_vfs_link(work, target_name, link_name); 5654 if (rc) 5655 rc = -EINVAL; 5656out: 5657 if (file_present) 5658 ksmbd_vfs_kern_path_unlock(&parent_path, &path); 5659 5660 if (!IS_ERR(link_name)) 5661 kfree(link_name); 5662 kfree(pathname); 5663 return rc; 5664} 5665 5666static int set_file_basic_info(struct ksmbd_file *fp, 5667 struct smb2_file_basic_info *file_info, 5668 struct ksmbd_share_config *share) 5669{ 5670 struct iattr attrs; 5671 struct file *filp; 5672 struct inode *inode; 5673 struct mnt_idmap *idmap; 5674 int rc = 0; 5675 5676 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) 5677 return -EACCES; 5678 5679 attrs.ia_valid = 0; 5680 filp = fp->filp; 5681 inode = file_inode(filp); 5682 idmap = file_mnt_idmap(filp); 5683 5684 if (file_info->CreationTime) 5685 fp->create_time = le64_to_cpu(file_info->CreationTime); 5686 5687 if (file_info->LastAccessTime) { 5688 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); 5689 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 5690 } 5691 5692 attrs.ia_valid |= ATTR_CTIME; 5693 if (file_info->ChangeTime) 5694 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); 5695 else 5696 attrs.ia_ctime = inode_get_ctime(inode); 5697 5698 if (file_info->LastWriteTime) { 5699 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); 5700 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 5701 } 5702 5703 if (file_info->Attributes) { 5704 if (!S_ISDIR(inode->i_mode) && 5705 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { 5706 pr_err("can't change a file to a directory\n"); 5707 return -EINVAL; 5708 } 5709 5710 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) 5711 fp->f_ci->m_fattr = file_info->Attributes | 5712 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); 5713 } 5714 5715 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && 5716 (file_info->CreationTime || file_info->Attributes)) { 5717 struct xattr_dos_attrib da = {0}; 5718 5719 da.version = 4; 5720 da.itime = fp->itime; 5721 da.create_time = fp->create_time; 5722 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 5723 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | 5724 XATTR_DOSINFO_ITIME; 5725 5726 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, 5727 true); 5728 if (rc) 5729 ksmbd_debug(SMB, 5730 "failed to restore file attribute in EA\n"); 5731 rc = 0; 5732 } 5733 5734 if (attrs.ia_valid) { 5735 struct dentry *dentry = filp->f_path.dentry; 5736 struct inode *inode = d_inode(dentry); 5737 5738 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 5739 return -EACCES; 5740 5741 inode_lock(inode); 5742 inode_set_ctime_to_ts(inode, attrs.ia_ctime); 5743 attrs.ia_valid &= ~ATTR_CTIME; 5744 rc = notify_change(idmap, dentry, &attrs, NULL); 5745 inode_unlock(inode); 5746 } 5747 return rc; 5748} 5749 5750static int set_file_allocation_info(struct ksmbd_work *work, 5751 struct ksmbd_file *fp, 5752 struct smb2_file_alloc_info *file_alloc_info) 5753{ 5754 /* 5755 * TODO : It's working fine only when store dos attributes 5756 * is not yes. need to implement a logic which works 5757 * properly with any smb.conf option 5758 */ 5759 5760 loff_t alloc_blks; 5761 struct inode *inode; 5762 int rc; 5763 5764 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5765 return -EACCES; 5766 5767 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; 5768 inode = file_inode(fp->filp); 5769 5770 if (alloc_blks > inode->i_blocks) { 5771 smb_break_all_levII_oplock(work, fp, 1); 5772 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, 5773 alloc_blks * 512); 5774 if (rc && rc != -EOPNOTSUPP) { 5775 pr_err("vfs_fallocate is failed : %d\n", rc); 5776 return rc; 5777 } 5778 } else if (alloc_blks < inode->i_blocks) { 5779 loff_t size; 5780 5781 /* 5782 * Allocation size could be smaller than original one 5783 * which means allocated blocks in file should be 5784 * deallocated. use truncate to cut out it, but inode 5785 * size is also updated with truncate offset. 5786 * inode size is retained by backup inode size. 5787 */ 5788 size = i_size_read(inode); 5789 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); 5790 if (rc) { 5791 pr_err("truncate failed!, err %d\n", rc); 5792 return rc; 5793 } 5794 if (size < alloc_blks * 512) 5795 i_size_write(inode, size); 5796 } 5797 return 0; 5798} 5799 5800static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5801 struct smb2_file_eof_info *file_eof_info) 5802{ 5803 loff_t newsize; 5804 struct inode *inode; 5805 int rc; 5806 5807 if (!(fp->daccess & FILE_WRITE_DATA_LE)) 5808 return -EACCES; 5809 5810 newsize = le64_to_cpu(file_eof_info->EndOfFile); 5811 inode = file_inode(fp->filp); 5812 5813 /* 5814 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called 5815 * on FAT32 shared device, truncate execution time is too long 5816 * and network error could cause from windows client. because 5817 * truncate of some filesystem like FAT32 fill zero data in 5818 * truncated range. 5819 */ 5820 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { 5821 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); 5822 rc = ksmbd_vfs_truncate(work, fp, newsize); 5823 if (rc) { 5824 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); 5825 if (rc != -EAGAIN) 5826 rc = -EBADF; 5827 return rc; 5828 } 5829 } 5830 return 0; 5831} 5832 5833static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, 5834 struct smb2_file_rename_info *rename_info, 5835 unsigned int buf_len) 5836{ 5837 if (!(fp->daccess & FILE_DELETE_LE)) { 5838 pr_err("no right to delete : 0x%x\n", fp->daccess); 5839 return -EACCES; 5840 } 5841 5842 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + 5843 le32_to_cpu(rename_info->FileNameLength)) 5844 return -EINVAL; 5845 5846 if (!le32_to_cpu(rename_info->FileNameLength)) 5847 return -EINVAL; 5848 5849 return smb2_rename(work, fp, rename_info, work->conn->local_nls); 5850} 5851 5852static int set_file_disposition_info(struct ksmbd_file *fp, 5853 struct smb2_file_disposition_info *file_info) 5854{ 5855 struct inode *inode; 5856 5857 if (!(fp->daccess & FILE_DELETE_LE)) { 5858 pr_err("no right to delete : 0x%x\n", fp->daccess); 5859 return -EACCES; 5860 } 5861 5862 inode = file_inode(fp->filp); 5863 if (file_info->DeletePending) { 5864 if (S_ISDIR(inode->i_mode) && 5865 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) 5866 return -EBUSY; 5867 ksmbd_set_inode_pending_delete(fp); 5868 } else { 5869 ksmbd_clear_inode_pending_delete(fp); 5870 } 5871 return 0; 5872} 5873 5874static int set_file_position_info(struct ksmbd_file *fp, 5875 struct smb2_file_pos_info *file_info) 5876{ 5877 loff_t current_byte_offset; 5878 unsigned long sector_size; 5879 struct inode *inode; 5880 5881 inode = file_inode(fp->filp); 5882 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); 5883 sector_size = inode->i_sb->s_blocksize; 5884 5885 if (current_byte_offset < 0 || 5886 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && 5887 current_byte_offset & (sector_size - 1))) { 5888 pr_err("CurrentByteOffset is not valid : %llu\n", 5889 current_byte_offset); 5890 return -EINVAL; 5891 } 5892 5893 fp->filp->f_pos = current_byte_offset; 5894 return 0; 5895} 5896 5897static int set_file_mode_info(struct ksmbd_file *fp, 5898 struct smb2_file_mode_info *file_info) 5899{ 5900 __le32 mode; 5901 5902 mode = file_info->Mode; 5903 5904 if ((mode & ~FILE_MODE_INFO_MASK)) { 5905 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); 5906 return -EINVAL; 5907 } 5908 5909 /* 5910 * TODO : need to implement consideration for 5911 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT 5912 */ 5913 ksmbd_vfs_set_fadvise(fp->filp, mode); 5914 fp->coption = mode; 5915 return 0; 5916} 5917 5918/** 5919 * smb2_set_info_file() - handler for smb2 set info command 5920 * @work: smb work containing set info command buffer 5921 * @fp: ksmbd_file pointer 5922 * @req: request buffer pointer 5923 * @share: ksmbd_share_config pointer 5924 * 5925 * Return: 0 on success, otherwise error 5926 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH 5927 */ 5928static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, 5929 struct smb2_set_info_req *req, 5930 struct ksmbd_share_config *share) 5931{ 5932 unsigned int buf_len = le32_to_cpu(req->BufferLength); 5933 5934 switch (req->FileInfoClass) { 5935 case FILE_BASIC_INFORMATION: 5936 { 5937 if (buf_len < sizeof(struct smb2_file_basic_info)) 5938 return -EINVAL; 5939 5940 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share); 5941 } 5942 case FILE_ALLOCATION_INFORMATION: 5943 { 5944 if (buf_len < sizeof(struct smb2_file_alloc_info)) 5945 return -EINVAL; 5946 5947 return set_file_allocation_info(work, fp, 5948 (struct smb2_file_alloc_info *)req->Buffer); 5949 } 5950 case FILE_END_OF_FILE_INFORMATION: 5951 { 5952 if (buf_len < sizeof(struct smb2_file_eof_info)) 5953 return -EINVAL; 5954 5955 return set_end_of_file_info(work, fp, 5956 (struct smb2_file_eof_info *)req->Buffer); 5957 } 5958 case FILE_RENAME_INFORMATION: 5959 { 5960 if (buf_len < sizeof(struct smb2_file_rename_info)) 5961 return -EINVAL; 5962 5963 return set_rename_info(work, fp, 5964 (struct smb2_file_rename_info *)req->Buffer, 5965 buf_len); 5966 } 5967 case FILE_LINK_INFORMATION: 5968 { 5969 if (buf_len < sizeof(struct smb2_file_link_info)) 5970 return -EINVAL; 5971 5972 return smb2_create_link(work, work->tcon->share_conf, 5973 (struct smb2_file_link_info *)req->Buffer, 5974 buf_len, fp->filp, 5975 work->conn->local_nls); 5976 } 5977 case FILE_DISPOSITION_INFORMATION: 5978 { 5979 if (buf_len < sizeof(struct smb2_file_disposition_info)) 5980 return -EINVAL; 5981 5982 return set_file_disposition_info(fp, 5983 (struct smb2_file_disposition_info *)req->Buffer); 5984 } 5985 case FILE_FULL_EA_INFORMATION: 5986 { 5987 if (!(fp->daccess & FILE_WRITE_EA_LE)) { 5988 pr_err("Not permitted to write ext attr: 0x%x\n", 5989 fp->daccess); 5990 return -EACCES; 5991 } 5992 5993 if (buf_len < sizeof(struct smb2_ea_info)) 5994 return -EINVAL; 5995 5996 return smb2_set_ea((struct smb2_ea_info *)req->Buffer, 5997 buf_len, &fp->filp->f_path, true); 5998 } 5999 case FILE_POSITION_INFORMATION: 6000 { 6001 if (buf_len < sizeof(struct smb2_file_pos_info)) 6002 return -EINVAL; 6003 6004 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer); 6005 } 6006 case FILE_MODE_INFORMATION: 6007 { 6008 if (buf_len < sizeof(struct smb2_file_mode_info)) 6009 return -EINVAL; 6010 6011 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer); 6012 } 6013 } 6014 6015 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); 6016 return -EOPNOTSUPP; 6017} 6018 6019static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, 6020 char *buffer, int buf_len) 6021{ 6022 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; 6023 6024 fp->saccess |= FILE_SHARE_DELETE_LE; 6025 6026 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, 6027 buf_len, false, true); 6028} 6029 6030/** 6031 * smb2_set_info() - handler for smb2 set info command handler 6032 * @work: smb work containing set info request buffer 6033 * 6034 * Return: 0 on success, otherwise error 6035 */ 6036int smb2_set_info(struct ksmbd_work *work) 6037{ 6038 struct smb2_set_info_req *req; 6039 struct smb2_set_info_rsp *rsp; 6040 struct ksmbd_file *fp = NULL; 6041 int rc = 0; 6042 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6043 6044 ksmbd_debug(SMB, "Received set info request\n"); 6045 6046 if (work->next_smb2_rcv_hdr_off) { 6047 req = ksmbd_req_buf_next(work); 6048 rsp = ksmbd_resp_buf_next(work); 6049 if (!has_file_id(req->VolatileFileId)) { 6050 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6051 work->compound_fid); 6052 id = work->compound_fid; 6053 pid = work->compound_pfid; 6054 } 6055 } else { 6056 req = smb2_get_msg(work->request_buf); 6057 rsp = smb2_get_msg(work->response_buf); 6058 } 6059 6060 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6061 ksmbd_debug(SMB, "User does not have write permission\n"); 6062 pr_err("User does not have write permission\n"); 6063 rc = -EACCES; 6064 goto err_out; 6065 } 6066 6067 if (!has_file_id(id)) { 6068 id = req->VolatileFileId; 6069 pid = req->PersistentFileId; 6070 } 6071 6072 fp = ksmbd_lookup_fd_slow(work, id, pid); 6073 if (!fp) { 6074 ksmbd_debug(SMB, "Invalid id for close: %u\n", id); 6075 rc = -ENOENT; 6076 goto err_out; 6077 } 6078 6079 switch (req->InfoType) { 6080 case SMB2_O_INFO_FILE: 6081 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); 6082 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); 6083 break; 6084 case SMB2_O_INFO_SECURITY: 6085 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); 6086 if (ksmbd_override_fsids(work)) { 6087 rc = -ENOMEM; 6088 goto err_out; 6089 } 6090 rc = smb2_set_info_sec(fp, 6091 le32_to_cpu(req->AdditionalInformation), 6092 req->Buffer, 6093 le32_to_cpu(req->BufferLength)); 6094 ksmbd_revert_fsids(work); 6095 break; 6096 default: 6097 rc = -EOPNOTSUPP; 6098 } 6099 6100 if (rc < 0) 6101 goto err_out; 6102 6103 rsp->StructureSize = cpu_to_le16(2); 6104 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, 6105 sizeof(struct smb2_set_info_rsp)); 6106 if (rc) 6107 goto err_out; 6108 ksmbd_fd_put(work, fp); 6109 return 0; 6110 6111err_out: 6112 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) 6113 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6114 else if (rc == -EINVAL) 6115 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6116 else if (rc == -ESHARE) 6117 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6118 else if (rc == -ENOENT) 6119 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; 6120 else if (rc == -EBUSY || rc == -ENOTEMPTY) 6121 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; 6122 else if (rc == -EAGAIN) 6123 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6124 else if (rc == -EBADF || rc == -ESTALE) 6125 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6126 else if (rc == -EEXIST) 6127 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; 6128 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) 6129 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; 6130 smb2_set_err_rsp(work); 6131 ksmbd_fd_put(work, fp); 6132 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); 6133 return rc; 6134} 6135 6136/** 6137 * smb2_read_pipe() - handler for smb2 read from IPC pipe 6138 * @work: smb work containing read IPC pipe command buffer 6139 * 6140 * Return: 0 on success, otherwise error 6141 */ 6142static noinline int smb2_read_pipe(struct ksmbd_work *work) 6143{ 6144 int nbytes = 0, err; 6145 u64 id; 6146 struct ksmbd_rpc_command *rpc_resp; 6147 struct smb2_read_req *req; 6148 struct smb2_read_rsp *rsp; 6149 6150 WORK_BUFFERS(work, req, rsp); 6151 6152 id = req->VolatileFileId; 6153 6154 rpc_resp = ksmbd_rpc_read(work->sess, id); 6155 if (rpc_resp) { 6156 void *aux_payload_buf; 6157 6158 if (rpc_resp->flags != KSMBD_RPC_OK) { 6159 err = -EINVAL; 6160 goto out; 6161 } 6162 6163 aux_payload_buf = 6164 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL); 6165 if (!aux_payload_buf) { 6166 err = -ENOMEM; 6167 goto out; 6168 } 6169 6170 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); 6171 6172 nbytes = rpc_resp->payload_sz; 6173 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6174 offsetof(struct smb2_read_rsp, Buffer), 6175 aux_payload_buf, nbytes); 6176 if (err) { 6177 kvfree(aux_payload_buf); 6178 goto out; 6179 } 6180 kvfree(rpc_resp); 6181 } else { 6182 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6183 offsetof(struct smb2_read_rsp, Buffer)); 6184 if (err) 6185 goto out; 6186 } 6187 6188 rsp->StructureSize = cpu_to_le16(17); 6189 rsp->DataOffset = 80; 6190 rsp->Reserved = 0; 6191 rsp->DataLength = cpu_to_le32(nbytes); 6192 rsp->DataRemaining = 0; 6193 rsp->Flags = 0; 6194 return 0; 6195 6196out: 6197 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 6198 smb2_set_err_rsp(work); 6199 kvfree(rpc_resp); 6200 return err; 6201} 6202 6203static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, 6204 struct smb2_buffer_desc_v1 *desc, 6205 __le32 Channel, 6206 __le16 ChannelInfoLength) 6207{ 6208 unsigned int i, ch_count; 6209 6210 if (work->conn->dialect == SMB30_PROT_ID && 6211 Channel != SMB2_CHANNEL_RDMA_V1) 6212 return -EINVAL; 6213 6214 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); 6215 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { 6216 for (i = 0; i < ch_count; i++) { 6217 pr_info("RDMA r/w request %#x: token %#x, length %#x\n", 6218 i, 6219 le32_to_cpu(desc[i].token), 6220 le32_to_cpu(desc[i].length)); 6221 } 6222 } 6223 if (!ch_count) 6224 return -EINVAL; 6225 6226 work->need_invalidate_rkey = 6227 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); 6228 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) 6229 work->remote_key = le32_to_cpu(desc->token); 6230 return 0; 6231} 6232 6233static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, 6234 struct smb2_read_req *req, void *data_buf, 6235 size_t length) 6236{ 6237 int err; 6238 6239 err = ksmbd_conn_rdma_write(work->conn, data_buf, length, 6240 (struct smb2_buffer_desc_v1 *) 6241 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), 6242 le16_to_cpu(req->ReadChannelInfoLength)); 6243 if (err) 6244 return err; 6245 6246 return length; 6247} 6248 6249/** 6250 * smb2_read() - handler for smb2 read from file 6251 * @work: smb work containing read command buffer 6252 * 6253 * Return: 0 on success, otherwise error 6254 */ 6255int smb2_read(struct ksmbd_work *work) 6256{ 6257 struct ksmbd_conn *conn = work->conn; 6258 struct smb2_read_req *req; 6259 struct smb2_read_rsp *rsp; 6260 struct ksmbd_file *fp = NULL; 6261 loff_t offset; 6262 size_t length, mincount; 6263 ssize_t nbytes = 0, remain_bytes = 0; 6264 int err = 0; 6265 bool is_rdma_channel = false; 6266 unsigned int max_read_size = conn->vals->max_read_size; 6267 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; 6268 void *aux_payload_buf; 6269 6270 if (test_share_config_flag(work->tcon->share_conf, 6271 KSMBD_SHARE_FLAG_PIPE)) { 6272 ksmbd_debug(SMB, "IPC pipe read request\n"); 6273 return smb2_read_pipe(work); 6274 } 6275 6276 if (work->next_smb2_rcv_hdr_off) { 6277 req = ksmbd_req_buf_next(work); 6278 rsp = ksmbd_resp_buf_next(work); 6279 if (!has_file_id(req->VolatileFileId)) { 6280 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 6281 work->compound_fid); 6282 id = work->compound_fid; 6283 pid = work->compound_pfid; 6284 } 6285 } else { 6286 req = smb2_get_msg(work->request_buf); 6287 rsp = smb2_get_msg(work->response_buf); 6288 } 6289 6290 if (!has_file_id(id)) { 6291 id = req->VolatileFileId; 6292 pid = req->PersistentFileId; 6293 } 6294 6295 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || 6296 req->Channel == SMB2_CHANNEL_RDMA_V1) { 6297 is_rdma_channel = true; 6298 max_read_size = get_smbd_max_read_write_size(); 6299 } 6300 6301 if (is_rdma_channel == true) { 6302 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); 6303 6304 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { 6305 err = -EINVAL; 6306 goto out; 6307 } 6308 err = smb2_set_remote_key_for_rdma(work, 6309 (struct smb2_buffer_desc_v1 *) 6310 ((char *)req + ch_offset), 6311 req->Channel, 6312 req->ReadChannelInfoLength); 6313 if (err) 6314 goto out; 6315 } 6316 6317 fp = ksmbd_lookup_fd_slow(work, id, pid); 6318 if (!fp) { 6319 err = -ENOENT; 6320 goto out; 6321 } 6322 6323 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6324 pr_err("Not permitted to read : 0x%x\n", fp->daccess); 6325 err = -EACCES; 6326 goto out; 6327 } 6328 6329 offset = le64_to_cpu(req->Offset); 6330 length = le32_to_cpu(req->Length); 6331 mincount = le32_to_cpu(req->MinimumCount); 6332 6333 if (length > max_read_size) { 6334 ksmbd_debug(SMB, "limiting read size to max size(%u)\n", 6335 max_read_size); 6336 err = -EINVAL; 6337 goto out; 6338 } 6339 6340 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6341 fp->filp, offset, length); 6342 6343 aux_payload_buf = kvzalloc(length, GFP_KERNEL); 6344 if (!aux_payload_buf) { 6345 err = -ENOMEM; 6346 goto out; 6347 } 6348 6349 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); 6350 if (nbytes < 0) { 6351 err = nbytes; 6352 goto out; 6353 } 6354 6355 if ((nbytes == 0 && length != 0) || nbytes < mincount) { 6356 kvfree(aux_payload_buf); 6357 rsp->hdr.Status = STATUS_END_OF_FILE; 6358 smb2_set_err_rsp(work); 6359 ksmbd_fd_put(work, fp); 6360 return 0; 6361 } 6362 6363 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", 6364 nbytes, offset, mincount); 6365 6366 if (is_rdma_channel == true) { 6367 /* write data to the client using rdma channel */ 6368 remain_bytes = smb2_read_rdma_channel(work, req, 6369 aux_payload_buf, 6370 nbytes); 6371 kvfree(aux_payload_buf); 6372 aux_payload_buf = NULL; 6373 nbytes = 0; 6374 if (remain_bytes < 0) { 6375 err = (int)remain_bytes; 6376 goto out; 6377 } 6378 } 6379 6380 rsp->StructureSize = cpu_to_le16(17); 6381 rsp->DataOffset = 80; 6382 rsp->Reserved = 0; 6383 rsp->DataLength = cpu_to_le32(nbytes); 6384 rsp->DataRemaining = cpu_to_le32(remain_bytes); 6385 rsp->Flags = 0; 6386 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, 6387 offsetof(struct smb2_read_rsp, Buffer), 6388 aux_payload_buf, nbytes); 6389 if (err) { 6390 kvfree(aux_payload_buf); 6391 goto out; 6392 } 6393 ksmbd_fd_put(work, fp); 6394 return 0; 6395 6396out: 6397 if (err) { 6398 if (err == -EISDIR) 6399 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; 6400 else if (err == -EAGAIN) 6401 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6402 else if (err == -ENOENT) 6403 rsp->hdr.Status = STATUS_FILE_CLOSED; 6404 else if (err == -EACCES) 6405 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6406 else if (err == -ESHARE) 6407 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6408 else if (err == -EINVAL) 6409 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6410 else 6411 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6412 6413 smb2_set_err_rsp(work); 6414 } 6415 ksmbd_fd_put(work, fp); 6416 return err; 6417} 6418 6419/** 6420 * smb2_write_pipe() - handler for smb2 write on IPC pipe 6421 * @work: smb work containing write IPC pipe command buffer 6422 * 6423 * Return: 0 on success, otherwise error 6424 */ 6425static noinline int smb2_write_pipe(struct ksmbd_work *work) 6426{ 6427 struct smb2_write_req *req; 6428 struct smb2_write_rsp *rsp; 6429 struct ksmbd_rpc_command *rpc_resp; 6430 u64 id = 0; 6431 int err = 0, ret = 0; 6432 char *data_buf; 6433 size_t length; 6434 6435 WORK_BUFFERS(work, req, rsp); 6436 6437 length = le32_to_cpu(req->Length); 6438 id = req->VolatileFileId; 6439 6440 if ((u64)le16_to_cpu(req->DataOffset) + length > 6441 get_rfc1002_len(work->request_buf)) { 6442 pr_err("invalid write data offset %u, smb_len %u\n", 6443 le16_to_cpu(req->DataOffset), 6444 get_rfc1002_len(work->request_buf)); 6445 err = -EINVAL; 6446 goto out; 6447 } 6448 6449 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6450 le16_to_cpu(req->DataOffset)); 6451 6452 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); 6453 if (rpc_resp) { 6454 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 6455 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 6456 kvfree(rpc_resp); 6457 smb2_set_err_rsp(work); 6458 return -EOPNOTSUPP; 6459 } 6460 if (rpc_resp->flags != KSMBD_RPC_OK) { 6461 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6462 smb2_set_err_rsp(work); 6463 kvfree(rpc_resp); 6464 return ret; 6465 } 6466 kvfree(rpc_resp); 6467 } 6468 6469 rsp->StructureSize = cpu_to_le16(17); 6470 rsp->DataOffset = 0; 6471 rsp->Reserved = 0; 6472 rsp->DataLength = cpu_to_le32(length); 6473 rsp->DataRemaining = 0; 6474 rsp->Reserved2 = 0; 6475 err = ksmbd_iov_pin_rsp(work, (void *)rsp, 6476 offsetof(struct smb2_write_rsp, Buffer)); 6477out: 6478 if (err) { 6479 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6480 smb2_set_err_rsp(work); 6481 } 6482 6483 return err; 6484} 6485 6486static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, 6487 struct smb2_write_req *req, 6488 struct ksmbd_file *fp, 6489 loff_t offset, size_t length, bool sync) 6490{ 6491 char *data_buf; 6492 int ret; 6493 ssize_t nbytes; 6494 6495 data_buf = kvzalloc(length, GFP_KERNEL); 6496 if (!data_buf) 6497 return -ENOMEM; 6498 6499 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, 6500 (struct smb2_buffer_desc_v1 *) 6501 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), 6502 le16_to_cpu(req->WriteChannelInfoLength)); 6503 if (ret < 0) { 6504 kvfree(data_buf); 6505 return ret; 6506 } 6507 6508 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); 6509 kvfree(data_buf); 6510 if (ret < 0) 6511 return ret; 6512 6513 return nbytes; 6514} 6515 6516/** 6517 * smb2_write() - handler for smb2 write from file 6518 * @work: smb work containing write command buffer 6519 * 6520 * Return: 0 on success, otherwise error 6521 */ 6522int smb2_write(struct ksmbd_work *work) 6523{ 6524 struct smb2_write_req *req; 6525 struct smb2_write_rsp *rsp; 6526 struct ksmbd_file *fp = NULL; 6527 loff_t offset; 6528 size_t length; 6529 ssize_t nbytes; 6530 char *data_buf; 6531 bool writethrough = false, is_rdma_channel = false; 6532 int err = 0; 6533 unsigned int max_write_size = work->conn->vals->max_write_size; 6534 6535 WORK_BUFFERS(work, req, rsp); 6536 6537 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { 6538 ksmbd_debug(SMB, "IPC pipe write request\n"); 6539 return smb2_write_pipe(work); 6540 } 6541 6542 offset = le64_to_cpu(req->Offset); 6543 length = le32_to_cpu(req->Length); 6544 6545 if (req->Channel == SMB2_CHANNEL_RDMA_V1 || 6546 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { 6547 is_rdma_channel = true; 6548 max_write_size = get_smbd_max_read_write_size(); 6549 length = le32_to_cpu(req->RemainingBytes); 6550 } 6551 6552 if (is_rdma_channel == true) { 6553 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); 6554 6555 if (req->Length != 0 || req->DataOffset != 0 || 6556 ch_offset < offsetof(struct smb2_write_req, Buffer)) { 6557 err = -EINVAL; 6558 goto out; 6559 } 6560 err = smb2_set_remote_key_for_rdma(work, 6561 (struct smb2_buffer_desc_v1 *) 6562 ((char *)req + ch_offset), 6563 req->Channel, 6564 req->WriteChannelInfoLength); 6565 if (err) 6566 goto out; 6567 } 6568 6569 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 6570 ksmbd_debug(SMB, "User does not have write permission\n"); 6571 err = -EACCES; 6572 goto out; 6573 } 6574 6575 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6576 if (!fp) { 6577 err = -ENOENT; 6578 goto out; 6579 } 6580 6581 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { 6582 pr_err("Not permitted to write : 0x%x\n", fp->daccess); 6583 err = -EACCES; 6584 goto out; 6585 } 6586 6587 if (length > max_write_size) { 6588 ksmbd_debug(SMB, "limiting write size to max size(%u)\n", 6589 max_write_size); 6590 err = -EINVAL; 6591 goto out; 6592 } 6593 6594 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); 6595 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) 6596 writethrough = true; 6597 6598 if (is_rdma_channel == false) { 6599 if (le16_to_cpu(req->DataOffset) < 6600 offsetof(struct smb2_write_req, Buffer)) { 6601 err = -EINVAL; 6602 goto out; 6603 } 6604 6605 data_buf = (char *)(((char *)&req->hdr.ProtocolId) + 6606 le16_to_cpu(req->DataOffset)); 6607 6608 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", 6609 fp->filp, offset, length); 6610 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, 6611 writethrough, &nbytes); 6612 if (err < 0) 6613 goto out; 6614 } else { 6615 /* read data from the client using rdma channel, and 6616 * write the data. 6617 */ 6618 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, 6619 writethrough); 6620 if (nbytes < 0) { 6621 err = (int)nbytes; 6622 goto out; 6623 } 6624 } 6625 6626 rsp->StructureSize = cpu_to_le16(17); 6627 rsp->DataOffset = 0; 6628 rsp->Reserved = 0; 6629 rsp->DataLength = cpu_to_le32(nbytes); 6630 rsp->DataRemaining = 0; 6631 rsp->Reserved2 = 0; 6632 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); 6633 if (err) 6634 goto out; 6635 ksmbd_fd_put(work, fp); 6636 return 0; 6637 6638out: 6639 if (err == -EAGAIN) 6640 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 6641 else if (err == -ENOSPC || err == -EFBIG) 6642 rsp->hdr.Status = STATUS_DISK_FULL; 6643 else if (err == -ENOENT) 6644 rsp->hdr.Status = STATUS_FILE_CLOSED; 6645 else if (err == -EACCES) 6646 rsp->hdr.Status = STATUS_ACCESS_DENIED; 6647 else if (err == -ESHARE) 6648 rsp->hdr.Status = STATUS_SHARING_VIOLATION; 6649 else if (err == -EINVAL) 6650 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 6651 else 6652 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6653 6654 smb2_set_err_rsp(work); 6655 ksmbd_fd_put(work, fp); 6656 return err; 6657} 6658 6659/** 6660 * smb2_flush() - handler for smb2 flush file - fsync 6661 * @work: smb work containing flush command buffer 6662 * 6663 * Return: 0 on success, otherwise error 6664 */ 6665int smb2_flush(struct ksmbd_work *work) 6666{ 6667 struct smb2_flush_req *req; 6668 struct smb2_flush_rsp *rsp; 6669 int err; 6670 6671 WORK_BUFFERS(work, req, rsp); 6672 6673 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); 6674 6675 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); 6676 if (err) 6677 goto out; 6678 6679 rsp->StructureSize = cpu_to_le16(4); 6680 rsp->Reserved = 0; 6681 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); 6682 6683out: 6684 rsp->hdr.Status = STATUS_INVALID_HANDLE; 6685 smb2_set_err_rsp(work); 6686 return err; 6687} 6688 6689/** 6690 * smb2_cancel() - handler for smb2 cancel command 6691 * @work: smb work containing cancel command buffer 6692 * 6693 * Return: 0 on success, otherwise error 6694 */ 6695int smb2_cancel(struct ksmbd_work *work) 6696{ 6697 struct ksmbd_conn *conn = work->conn; 6698 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); 6699 struct smb2_hdr *chdr; 6700 struct ksmbd_work *iter; 6701 struct list_head *command_list; 6702 6703 if (work->next_smb2_rcv_hdr_off) 6704 hdr = ksmbd_resp_buf_next(work); 6705 6706 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", 6707 hdr->MessageId, hdr->Flags); 6708 6709 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { 6710 command_list = &conn->async_requests; 6711 6712 spin_lock(&conn->request_lock); 6713 list_for_each_entry(iter, command_list, 6714 async_request_entry) { 6715 chdr = smb2_get_msg(iter->request_buf); 6716 6717 if (iter->async_id != 6718 le64_to_cpu(hdr->Id.AsyncId)) 6719 continue; 6720 6721 ksmbd_debug(SMB, 6722 "smb2 with AsyncId %llu cancelled command = 0x%x\n", 6723 le64_to_cpu(hdr->Id.AsyncId), 6724 le16_to_cpu(chdr->Command)); 6725 iter->state = KSMBD_WORK_CANCELLED; 6726 if (iter->cancel_fn) 6727 iter->cancel_fn(iter->cancel_argv); 6728 break; 6729 } 6730 spin_unlock(&conn->request_lock); 6731 } else { 6732 command_list = &conn->requests; 6733 6734 spin_lock(&conn->request_lock); 6735 list_for_each_entry(iter, command_list, request_entry) { 6736 chdr = smb2_get_msg(iter->request_buf); 6737 6738 if (chdr->MessageId != hdr->MessageId || 6739 iter == work) 6740 continue; 6741 6742 ksmbd_debug(SMB, 6743 "smb2 with mid %llu cancelled command = 0x%x\n", 6744 le64_to_cpu(hdr->MessageId), 6745 le16_to_cpu(chdr->Command)); 6746 iter->state = KSMBD_WORK_CANCELLED; 6747 break; 6748 } 6749 spin_unlock(&conn->request_lock); 6750 } 6751 6752 /* For SMB2_CANCEL command itself send no response*/ 6753 work->send_no_response = 1; 6754 return 0; 6755} 6756 6757struct file_lock *smb_flock_init(struct file *f) 6758{ 6759 struct file_lock *fl; 6760 6761 fl = locks_alloc_lock(); 6762 if (!fl) 6763 goto out; 6764 6765 locks_init_lock(fl); 6766 6767 fl->fl_owner = f; 6768 fl->fl_pid = current->tgid; 6769 fl->fl_file = f; 6770 fl->fl_flags = FL_POSIX; 6771 fl->fl_ops = NULL; 6772 fl->fl_lmops = NULL; 6773 6774out: 6775 return fl; 6776} 6777 6778static int smb2_set_flock_flags(struct file_lock *flock, int flags) 6779{ 6780 int cmd = -EINVAL; 6781 6782 /* Checking for wrong flag combination during lock request*/ 6783 switch (flags) { 6784 case SMB2_LOCKFLAG_SHARED: 6785 ksmbd_debug(SMB, "received shared request\n"); 6786 cmd = F_SETLKW; 6787 flock->fl_type = F_RDLCK; 6788 flock->fl_flags |= FL_SLEEP; 6789 break; 6790 case SMB2_LOCKFLAG_EXCLUSIVE: 6791 ksmbd_debug(SMB, "received exclusive request\n"); 6792 cmd = F_SETLKW; 6793 flock->fl_type = F_WRLCK; 6794 flock->fl_flags |= FL_SLEEP; 6795 break; 6796 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6797 ksmbd_debug(SMB, 6798 "received shared & fail immediately request\n"); 6799 cmd = F_SETLK; 6800 flock->fl_type = F_RDLCK; 6801 break; 6802 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: 6803 ksmbd_debug(SMB, 6804 "received exclusive & fail immediately request\n"); 6805 cmd = F_SETLK; 6806 flock->fl_type = F_WRLCK; 6807 break; 6808 case SMB2_LOCKFLAG_UNLOCK: 6809 ksmbd_debug(SMB, "received unlock request\n"); 6810 flock->fl_type = F_UNLCK; 6811 cmd = F_SETLK; 6812 break; 6813 } 6814 6815 return cmd; 6816} 6817 6818static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, 6819 unsigned int cmd, int flags, 6820 struct list_head *lock_list) 6821{ 6822 struct ksmbd_lock *lock; 6823 6824 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); 6825 if (!lock) 6826 return NULL; 6827 6828 lock->cmd = cmd; 6829 lock->fl = flock; 6830 lock->start = flock->fl_start; 6831 lock->end = flock->fl_end; 6832 lock->flags = flags; 6833 if (lock->start == lock->end) 6834 lock->zero_len = 1; 6835 INIT_LIST_HEAD(&lock->clist); 6836 INIT_LIST_HEAD(&lock->flist); 6837 INIT_LIST_HEAD(&lock->llist); 6838 list_add_tail(&lock->llist, lock_list); 6839 6840 return lock; 6841} 6842 6843static void smb2_remove_blocked_lock(void **argv) 6844{ 6845 struct file_lock *flock = (struct file_lock *)argv[0]; 6846 6847 ksmbd_vfs_posix_lock_unblock(flock); 6848 wake_up(&flock->fl_wait); 6849} 6850 6851static inline bool lock_defer_pending(struct file_lock *fl) 6852{ 6853 /* check pending lock waiters */ 6854 return waitqueue_active(&fl->fl_wait); 6855} 6856 6857/** 6858 * smb2_lock() - handler for smb2 file lock command 6859 * @work: smb work containing lock command buffer 6860 * 6861 * Return: 0 on success, otherwise error 6862 */ 6863int smb2_lock(struct ksmbd_work *work) 6864{ 6865 struct smb2_lock_req *req; 6866 struct smb2_lock_rsp *rsp; 6867 struct smb2_lock_element *lock_ele; 6868 struct ksmbd_file *fp = NULL; 6869 struct file_lock *flock = NULL; 6870 struct file *filp = NULL; 6871 int lock_count; 6872 int flags = 0; 6873 int cmd = 0; 6874 int err = -EIO, i, rc = 0; 6875 u64 lock_start, lock_length; 6876 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; 6877 struct ksmbd_conn *conn; 6878 int nolock = 0; 6879 LIST_HEAD(lock_list); 6880 LIST_HEAD(rollback_list); 6881 int prior_lock = 0; 6882 6883 WORK_BUFFERS(work, req, rsp); 6884 6885 ksmbd_debug(SMB, "Received lock request\n"); 6886 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 6887 if (!fp) { 6888 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); 6889 err = -ENOENT; 6890 goto out2; 6891 } 6892 6893 filp = fp->filp; 6894 lock_count = le16_to_cpu(req->LockCount); 6895 lock_ele = req->locks; 6896 6897 ksmbd_debug(SMB, "lock count is %d\n", lock_count); 6898 if (!lock_count) { 6899 err = -EINVAL; 6900 goto out2; 6901 } 6902 6903 for (i = 0; i < lock_count; i++) { 6904 flags = le32_to_cpu(lock_ele[i].Flags); 6905 6906 flock = smb_flock_init(filp); 6907 if (!flock) 6908 goto out; 6909 6910 cmd = smb2_set_flock_flags(flock, flags); 6911 6912 lock_start = le64_to_cpu(lock_ele[i].Offset); 6913 lock_length = le64_to_cpu(lock_ele[i].Length); 6914 if (lock_start > U64_MAX - lock_length) { 6915 pr_err("Invalid lock range requested\n"); 6916 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6917 locks_free_lock(flock); 6918 goto out; 6919 } 6920 6921 if (lock_start > OFFSET_MAX) 6922 flock->fl_start = OFFSET_MAX; 6923 else 6924 flock->fl_start = lock_start; 6925 6926 lock_length = le64_to_cpu(lock_ele[i].Length); 6927 if (lock_length > OFFSET_MAX - flock->fl_start) 6928 lock_length = OFFSET_MAX - flock->fl_start; 6929 6930 flock->fl_end = flock->fl_start + lock_length; 6931 6932 if (flock->fl_end < flock->fl_start) { 6933 ksmbd_debug(SMB, 6934 "the end offset(%llx) is smaller than the start offset(%llx)\n", 6935 flock->fl_end, flock->fl_start); 6936 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; 6937 locks_free_lock(flock); 6938 goto out; 6939 } 6940 6941 /* Check conflict locks in one request */ 6942 list_for_each_entry(cmp_lock, &lock_list, llist) { 6943 if (cmp_lock->fl->fl_start <= flock->fl_start && 6944 cmp_lock->fl->fl_end >= flock->fl_end) { 6945 if (cmp_lock->fl->fl_type != F_UNLCK && 6946 flock->fl_type != F_UNLCK) { 6947 pr_err("conflict two locks in one request\n"); 6948 err = -EINVAL; 6949 locks_free_lock(flock); 6950 goto out; 6951 } 6952 } 6953 } 6954 6955 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); 6956 if (!smb_lock) { 6957 err = -EINVAL; 6958 locks_free_lock(flock); 6959 goto out; 6960 } 6961 } 6962 6963 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 6964 if (smb_lock->cmd < 0) { 6965 err = -EINVAL; 6966 goto out; 6967 } 6968 6969 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { 6970 err = -EINVAL; 6971 goto out; 6972 } 6973 6974 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && 6975 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || 6976 (prior_lock == SMB2_LOCKFLAG_UNLOCK && 6977 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { 6978 err = -EINVAL; 6979 goto out; 6980 } 6981 6982 prior_lock = smb_lock->flags; 6983 6984 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && 6985 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) 6986 goto no_check_cl; 6987 6988 nolock = 1; 6989 /* check locks in connection list */ 6990 down_read(&conn_list_lock); 6991 list_for_each_entry(conn, &conn_list, conns_list) { 6992 spin_lock(&conn->llist_lock); 6993 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { 6994 if (file_inode(cmp_lock->fl->fl_file) != 6995 file_inode(smb_lock->fl->fl_file)) 6996 continue; 6997 6998 if (smb_lock->fl->fl_type == F_UNLCK) { 6999 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file && 7000 cmp_lock->start == smb_lock->start && 7001 cmp_lock->end == smb_lock->end && 7002 !lock_defer_pending(cmp_lock->fl)) { 7003 nolock = 0; 7004 list_del(&cmp_lock->flist); 7005 list_del(&cmp_lock->clist); 7006 spin_unlock(&conn->llist_lock); 7007 up_read(&conn_list_lock); 7008 7009 locks_free_lock(cmp_lock->fl); 7010 kfree(cmp_lock); 7011 goto out_check_cl; 7012 } 7013 continue; 7014 } 7015 7016 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) { 7017 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) 7018 continue; 7019 } else { 7020 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) 7021 continue; 7022 } 7023 7024 /* check zero byte lock range */ 7025 if (cmp_lock->zero_len && !smb_lock->zero_len && 7026 cmp_lock->start > smb_lock->start && 7027 cmp_lock->start < smb_lock->end) { 7028 spin_unlock(&conn->llist_lock); 7029 up_read(&conn_list_lock); 7030 pr_err("previous lock conflict with zero byte lock range\n"); 7031 goto out; 7032 } 7033 7034 if (smb_lock->zero_len && !cmp_lock->zero_len && 7035 smb_lock->start > cmp_lock->start && 7036 smb_lock->start < cmp_lock->end) { 7037 spin_unlock(&conn->llist_lock); 7038 up_read(&conn_list_lock); 7039 pr_err("current lock conflict with zero byte lock range\n"); 7040 goto out; 7041 } 7042 7043 if (((cmp_lock->start <= smb_lock->start && 7044 cmp_lock->end > smb_lock->start) || 7045 (cmp_lock->start < smb_lock->end && 7046 cmp_lock->end >= smb_lock->end)) && 7047 !cmp_lock->zero_len && !smb_lock->zero_len) { 7048 spin_unlock(&conn->llist_lock); 7049 up_read(&conn_list_lock); 7050 pr_err("Not allow lock operation on exclusive lock range\n"); 7051 goto out; 7052 } 7053 } 7054 spin_unlock(&conn->llist_lock); 7055 } 7056 up_read(&conn_list_lock); 7057out_check_cl: 7058 if (smb_lock->fl->fl_type == F_UNLCK && nolock) { 7059 pr_err("Try to unlock nolocked range\n"); 7060 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; 7061 goto out; 7062 } 7063 7064no_check_cl: 7065 if (smb_lock->zero_len) { 7066 err = 0; 7067 goto skip; 7068 } 7069 7070 flock = smb_lock->fl; 7071 list_del(&smb_lock->llist); 7072retry: 7073 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); 7074skip: 7075 if (flags & SMB2_LOCKFLAG_UNLOCK) { 7076 if (!rc) { 7077 ksmbd_debug(SMB, "File unlocked\n"); 7078 } else if (rc == -ENOENT) { 7079 rsp->hdr.Status = STATUS_NOT_LOCKED; 7080 goto out; 7081 } 7082 locks_free_lock(flock); 7083 kfree(smb_lock); 7084 } else { 7085 if (rc == FILE_LOCK_DEFERRED) { 7086 void **argv; 7087 7088 ksmbd_debug(SMB, 7089 "would have to wait for getting lock\n"); 7090 list_add(&smb_lock->llist, &rollback_list); 7091 7092 argv = kmalloc(sizeof(void *), GFP_KERNEL); 7093 if (!argv) { 7094 err = -ENOMEM; 7095 goto out; 7096 } 7097 argv[0] = flock; 7098 7099 rc = setup_async_work(work, 7100 smb2_remove_blocked_lock, 7101 argv); 7102 if (rc) { 7103 kfree(argv); 7104 err = -ENOMEM; 7105 goto out; 7106 } 7107 spin_lock(&fp->f_lock); 7108 list_add(&work->fp_entry, &fp->blocked_works); 7109 spin_unlock(&fp->f_lock); 7110 7111 smb2_send_interim_resp(work, STATUS_PENDING); 7112 7113 ksmbd_vfs_posix_lock_wait(flock); 7114 7115 spin_lock(&fp->f_lock); 7116 list_del(&work->fp_entry); 7117 spin_unlock(&fp->f_lock); 7118 7119 if (work->state != KSMBD_WORK_ACTIVE) { 7120 list_del(&smb_lock->llist); 7121 locks_free_lock(flock); 7122 7123 if (work->state == KSMBD_WORK_CANCELLED) { 7124 rsp->hdr.Status = 7125 STATUS_CANCELLED; 7126 kfree(smb_lock); 7127 smb2_send_interim_resp(work, 7128 STATUS_CANCELLED); 7129 work->send_no_response = 1; 7130 goto out; 7131 } 7132 7133 rsp->hdr.Status = 7134 STATUS_RANGE_NOT_LOCKED; 7135 kfree(smb_lock); 7136 goto out2; 7137 } 7138 7139 list_del(&smb_lock->llist); 7140 release_async_work(work); 7141 goto retry; 7142 } else if (!rc) { 7143 list_add(&smb_lock->llist, &rollback_list); 7144 spin_lock(&work->conn->llist_lock); 7145 list_add_tail(&smb_lock->clist, 7146 &work->conn->lock_list); 7147 list_add_tail(&smb_lock->flist, 7148 &fp->lock_list); 7149 spin_unlock(&work->conn->llist_lock); 7150 ksmbd_debug(SMB, "successful in taking lock\n"); 7151 } else { 7152 goto out; 7153 } 7154 } 7155 } 7156 7157 if (atomic_read(&fp->f_ci->op_count) > 1) 7158 smb_break_all_oplock(work, fp); 7159 7160 rsp->StructureSize = cpu_to_le16(4); 7161 ksmbd_debug(SMB, "successful in taking lock\n"); 7162 rsp->hdr.Status = STATUS_SUCCESS; 7163 rsp->Reserved = 0; 7164 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); 7165 if (err) 7166 goto out; 7167 7168 ksmbd_fd_put(work, fp); 7169 return 0; 7170 7171out: 7172 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { 7173 locks_free_lock(smb_lock->fl); 7174 list_del(&smb_lock->llist); 7175 kfree(smb_lock); 7176 } 7177 7178 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { 7179 struct file_lock *rlock = NULL; 7180 7181 rlock = smb_flock_init(filp); 7182 rlock->fl_type = F_UNLCK; 7183 rlock->fl_start = smb_lock->start; 7184 rlock->fl_end = smb_lock->end; 7185 7186 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); 7187 if (rc) 7188 pr_err("rollback unlock fail : %d\n", rc); 7189 7190 list_del(&smb_lock->llist); 7191 spin_lock(&work->conn->llist_lock); 7192 if (!list_empty(&smb_lock->flist)) 7193 list_del(&smb_lock->flist); 7194 list_del(&smb_lock->clist); 7195 spin_unlock(&work->conn->llist_lock); 7196 7197 locks_free_lock(smb_lock->fl); 7198 locks_free_lock(rlock); 7199 kfree(smb_lock); 7200 } 7201out2: 7202 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); 7203 7204 if (!rsp->hdr.Status) { 7205 if (err == -EINVAL) 7206 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7207 else if (err == -ENOMEM) 7208 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; 7209 else if (err == -ENOENT) 7210 rsp->hdr.Status = STATUS_FILE_CLOSED; 7211 else 7212 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; 7213 } 7214 7215 smb2_set_err_rsp(work); 7216 ksmbd_fd_put(work, fp); 7217 return err; 7218} 7219 7220static int fsctl_copychunk(struct ksmbd_work *work, 7221 struct copychunk_ioctl_req *ci_req, 7222 unsigned int cnt_code, 7223 unsigned int input_count, 7224 unsigned long long volatile_id, 7225 unsigned long long persistent_id, 7226 struct smb2_ioctl_rsp *rsp) 7227{ 7228 struct copychunk_ioctl_rsp *ci_rsp; 7229 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; 7230 struct srv_copychunk *chunks; 7231 unsigned int i, chunk_count, chunk_count_written = 0; 7232 unsigned int chunk_size_written = 0; 7233 loff_t total_size_written = 0; 7234 int ret = 0; 7235 7236 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; 7237 7238 rsp->VolatileFileId = volatile_id; 7239 rsp->PersistentFileId = persistent_id; 7240 ci_rsp->ChunksWritten = 7241 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); 7242 ci_rsp->ChunkBytesWritten = 7243 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); 7244 ci_rsp->TotalBytesWritten = 7245 cpu_to_le32(ksmbd_server_side_copy_max_total_size()); 7246 7247 chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; 7248 chunk_count = le32_to_cpu(ci_req->ChunkCount); 7249 if (chunk_count == 0) 7250 goto out; 7251 total_size_written = 0; 7252 7253 /* verify the SRV_COPYCHUNK_COPY packet */ 7254 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || 7255 input_count < offsetof(struct copychunk_ioctl_req, Chunks) + 7256 chunk_count * sizeof(struct srv_copychunk)) { 7257 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7258 return -EINVAL; 7259 } 7260 7261 for (i = 0; i < chunk_count; i++) { 7262 if (le32_to_cpu(chunks[i].Length) == 0 || 7263 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) 7264 break; 7265 total_size_written += le32_to_cpu(chunks[i].Length); 7266 } 7267 7268 if (i < chunk_count || 7269 total_size_written > ksmbd_server_side_copy_max_total_size()) { 7270 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7271 return -EINVAL; 7272 } 7273 7274 src_fp = ksmbd_lookup_foreign_fd(work, 7275 le64_to_cpu(ci_req->ResumeKey[0])); 7276 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 7277 ret = -EINVAL; 7278 if (!src_fp || 7279 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { 7280 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7281 goto out; 7282 } 7283 7284 if (!dst_fp) { 7285 rsp->hdr.Status = STATUS_FILE_CLOSED; 7286 goto out; 7287 } 7288 7289 /* 7290 * FILE_READ_DATA should only be included in 7291 * the FSCTL_COPYCHUNK case 7292 */ 7293 if (cnt_code == FSCTL_COPYCHUNK && 7294 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { 7295 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7296 goto out; 7297 } 7298 7299 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, 7300 chunks, chunk_count, 7301 &chunk_count_written, 7302 &chunk_size_written, 7303 &total_size_written); 7304 if (ret < 0) { 7305 if (ret == -EACCES) 7306 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7307 if (ret == -EAGAIN) 7308 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; 7309 else if (ret == -EBADF) 7310 rsp->hdr.Status = STATUS_INVALID_HANDLE; 7311 else if (ret == -EFBIG || ret == -ENOSPC) 7312 rsp->hdr.Status = STATUS_DISK_FULL; 7313 else if (ret == -EINVAL) 7314 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7315 else if (ret == -EISDIR) 7316 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; 7317 else if (ret == -E2BIG) 7318 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; 7319 else 7320 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; 7321 } 7322 7323 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); 7324 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); 7325 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); 7326out: 7327 ksmbd_fd_put(work, src_fp); 7328 ksmbd_fd_put(work, dst_fp); 7329 return ret; 7330} 7331 7332static __be32 idev_ipv4_address(struct in_device *idev) 7333{ 7334 __be32 addr = 0; 7335 7336 struct in_ifaddr *ifa; 7337 7338 rcu_read_lock(); 7339 in_dev_for_each_ifa_rcu(ifa, idev) { 7340 if (ifa->ifa_flags & IFA_F_SECONDARY) 7341 continue; 7342 7343 addr = ifa->ifa_address; 7344 break; 7345 } 7346 rcu_read_unlock(); 7347 return addr; 7348} 7349 7350static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, 7351 struct smb2_ioctl_rsp *rsp, 7352 unsigned int out_buf_len) 7353{ 7354 struct network_interface_info_ioctl_rsp *nii_rsp = NULL; 7355 int nbytes = 0; 7356 struct net_device *netdev; 7357 struct sockaddr_storage_rsp *sockaddr_storage; 7358 unsigned int flags; 7359 unsigned long long speed; 7360 7361 rtnl_lock(); 7362 for_each_netdev(&init_net, netdev) { 7363 bool ipv4_set = false; 7364 7365 if (netdev->type == ARPHRD_LOOPBACK) 7366 continue; 7367 7368 flags = dev_get_flags(netdev); 7369 if (!(flags & IFF_RUNNING)) 7370 continue; 7371ipv6_retry: 7372 if (out_buf_len < 7373 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { 7374 rtnl_unlock(); 7375 return -ENOSPC; 7376 } 7377 7378 nii_rsp = (struct network_interface_info_ioctl_rsp *) 7379 &rsp->Buffer[nbytes]; 7380 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); 7381 7382 nii_rsp->Capability = 0; 7383 if (netdev->real_num_tx_queues > 1) 7384 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); 7385 if (ksmbd_rdma_capable_netdev(netdev)) 7386 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); 7387 7388 nii_rsp->Next = cpu_to_le32(152); 7389 nii_rsp->Reserved = 0; 7390 7391 if (netdev->ethtool_ops->get_link_ksettings) { 7392 struct ethtool_link_ksettings cmd; 7393 7394 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); 7395 speed = cmd.base.speed; 7396 } else { 7397 ksmbd_debug(SMB, "%s %s\n", netdev->name, 7398 "speed is unknown, defaulting to 1Gb/sec"); 7399 speed = SPEED_1000; 7400 } 7401 7402 speed *= 1000000; 7403 nii_rsp->LinkSpeed = cpu_to_le64(speed); 7404 7405 sockaddr_storage = (struct sockaddr_storage_rsp *) 7406 nii_rsp->SockAddr_Storage; 7407 memset(sockaddr_storage, 0, 128); 7408 7409 if (!ipv4_set) { 7410 struct in_device *idev; 7411 7412 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); 7413 sockaddr_storage->addr4.Port = 0; 7414 7415 idev = __in_dev_get_rtnl(netdev); 7416 if (!idev) 7417 continue; 7418 sockaddr_storage->addr4.IPv4address = 7419 idev_ipv4_address(idev); 7420 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7421 ipv4_set = true; 7422 goto ipv6_retry; 7423 } else { 7424 struct inet6_dev *idev6; 7425 struct inet6_ifaddr *ifa; 7426 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; 7427 7428 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); 7429 sockaddr_storage->addr6.Port = 0; 7430 sockaddr_storage->addr6.FlowInfo = 0; 7431 7432 idev6 = __in6_dev_get(netdev); 7433 if (!idev6) 7434 continue; 7435 7436 list_for_each_entry(ifa, &idev6->addr_list, if_list) { 7437 if (ifa->flags & (IFA_F_TENTATIVE | 7438 IFA_F_DEPRECATED)) 7439 continue; 7440 memcpy(ipv6_addr, ifa->addr.s6_addr, 16); 7441 break; 7442 } 7443 sockaddr_storage->addr6.ScopeId = 0; 7444 nbytes += sizeof(struct network_interface_info_ioctl_rsp); 7445 } 7446 } 7447 rtnl_unlock(); 7448 7449 /* zero if this is last one */ 7450 if (nii_rsp) 7451 nii_rsp->Next = 0; 7452 7453 rsp->PersistentFileId = SMB2_NO_FID; 7454 rsp->VolatileFileId = SMB2_NO_FID; 7455 return nbytes; 7456} 7457 7458static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, 7459 struct validate_negotiate_info_req *neg_req, 7460 struct validate_negotiate_info_rsp *neg_rsp, 7461 unsigned int in_buf_len) 7462{ 7463 int ret = 0; 7464 int dialect; 7465 7466 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + 7467 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) 7468 return -EINVAL; 7469 7470 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, 7471 neg_req->DialectCount); 7472 if (dialect == BAD_PROT_ID || dialect != conn->dialect) { 7473 ret = -EINVAL; 7474 goto err_out; 7475 } 7476 7477 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { 7478 ret = -EINVAL; 7479 goto err_out; 7480 } 7481 7482 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { 7483 ret = -EINVAL; 7484 goto err_out; 7485 } 7486 7487 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { 7488 ret = -EINVAL; 7489 goto err_out; 7490 } 7491 7492 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); 7493 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); 7494 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); 7495 neg_rsp->Dialect = cpu_to_le16(conn->dialect); 7496err_out: 7497 return ret; 7498} 7499 7500static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, 7501 struct file_allocated_range_buffer *qar_req, 7502 struct file_allocated_range_buffer *qar_rsp, 7503 unsigned int in_count, unsigned int *out_count) 7504{ 7505 struct ksmbd_file *fp; 7506 loff_t start, length; 7507 int ret = 0; 7508 7509 *out_count = 0; 7510 if (in_count == 0) 7511 return -EINVAL; 7512 7513 start = le64_to_cpu(qar_req->file_offset); 7514 length = le64_to_cpu(qar_req->length); 7515 7516 if (start < 0 || length < 0) 7517 return -EINVAL; 7518 7519 fp = ksmbd_lookup_fd_fast(work, id); 7520 if (!fp) 7521 return -ENOENT; 7522 7523 ret = ksmbd_vfs_fqar_lseek(fp, start, length, 7524 qar_rsp, in_count, out_count); 7525 if (ret && ret != -E2BIG) 7526 *out_count = 0; 7527 7528 ksmbd_fd_put(work, fp); 7529 return ret; 7530} 7531 7532static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, 7533 unsigned int out_buf_len, 7534 struct smb2_ioctl_req *req, 7535 struct smb2_ioctl_rsp *rsp) 7536{ 7537 struct ksmbd_rpc_command *rpc_resp; 7538 char *data_buf = (char *)&req->Buffer[0]; 7539 int nbytes = 0; 7540 7541 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, 7542 le32_to_cpu(req->InputCount)); 7543 if (rpc_resp) { 7544 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { 7545 /* 7546 * set STATUS_SOME_NOT_MAPPED response 7547 * for unknown domain sid. 7548 */ 7549 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; 7550 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { 7551 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7552 goto out; 7553 } else if (rpc_resp->flags != KSMBD_RPC_OK) { 7554 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7555 goto out; 7556 } 7557 7558 nbytes = rpc_resp->payload_sz; 7559 if (rpc_resp->payload_sz > out_buf_len) { 7560 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7561 nbytes = out_buf_len; 7562 } 7563 7564 if (!rpc_resp->payload_sz) { 7565 rsp->hdr.Status = 7566 STATUS_UNEXPECTED_IO_ERROR; 7567 goto out; 7568 } 7569 7570 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); 7571 } 7572out: 7573 kvfree(rpc_resp); 7574 return nbytes; 7575} 7576 7577static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, 7578 struct file_sparse *sparse) 7579{ 7580 struct ksmbd_file *fp; 7581 struct mnt_idmap *idmap; 7582 int ret = 0; 7583 __le32 old_fattr; 7584 7585 fp = ksmbd_lookup_fd_fast(work, id); 7586 if (!fp) 7587 return -ENOENT; 7588 idmap = file_mnt_idmap(fp->filp); 7589 7590 old_fattr = fp->f_ci->m_fattr; 7591 if (sparse->SetSparse) 7592 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; 7593 else 7594 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; 7595 7596 if (fp->f_ci->m_fattr != old_fattr && 7597 test_share_config_flag(work->tcon->share_conf, 7598 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { 7599 struct xattr_dos_attrib da; 7600 7601 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, 7602 fp->filp->f_path.dentry, &da); 7603 if (ret <= 0) 7604 goto out; 7605 7606 da.attr = le32_to_cpu(fp->f_ci->m_fattr); 7607 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, 7608 &fp->filp->f_path, 7609 &da, true); 7610 if (ret) 7611 fp->f_ci->m_fattr = old_fattr; 7612 } 7613 7614out: 7615 ksmbd_fd_put(work, fp); 7616 return ret; 7617} 7618 7619static int fsctl_request_resume_key(struct ksmbd_work *work, 7620 struct smb2_ioctl_req *req, 7621 struct resume_key_ioctl_rsp *key_rsp) 7622{ 7623 struct ksmbd_file *fp; 7624 7625 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); 7626 if (!fp) 7627 return -ENOENT; 7628 7629 memset(key_rsp, 0, sizeof(*key_rsp)); 7630 key_rsp->ResumeKey[0] = req->VolatileFileId; 7631 key_rsp->ResumeKey[1] = req->PersistentFileId; 7632 ksmbd_fd_put(work, fp); 7633 7634 return 0; 7635} 7636 7637/** 7638 * smb2_ioctl() - handler for smb2 ioctl command 7639 * @work: smb work containing ioctl command buffer 7640 * 7641 * Return: 0 on success, otherwise error 7642 */ 7643int smb2_ioctl(struct ksmbd_work *work) 7644{ 7645 struct smb2_ioctl_req *req; 7646 struct smb2_ioctl_rsp *rsp; 7647 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; 7648 u64 id = KSMBD_NO_FID; 7649 struct ksmbd_conn *conn = work->conn; 7650 int ret = 0; 7651 7652 if (work->next_smb2_rcv_hdr_off) { 7653 req = ksmbd_req_buf_next(work); 7654 rsp = ksmbd_resp_buf_next(work); 7655 if (!has_file_id(req->VolatileFileId)) { 7656 ksmbd_debug(SMB, "Compound request set FID = %llu\n", 7657 work->compound_fid); 7658 id = work->compound_fid; 7659 } 7660 } else { 7661 req = smb2_get_msg(work->request_buf); 7662 rsp = smb2_get_msg(work->response_buf); 7663 } 7664 7665 if (!has_file_id(id)) 7666 id = req->VolatileFileId; 7667 7668 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { 7669 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7670 goto out; 7671 } 7672 7673 cnt_code = le32_to_cpu(req->CtlCode); 7674 ret = smb2_calc_max_out_buf_len(work, 48, 7675 le32_to_cpu(req->MaxOutputResponse)); 7676 if (ret < 0) { 7677 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7678 goto out; 7679 } 7680 out_buf_len = (unsigned int)ret; 7681 in_buf_len = le32_to_cpu(req->InputCount); 7682 7683 switch (cnt_code) { 7684 case FSCTL_DFS_GET_REFERRALS: 7685 case FSCTL_DFS_GET_REFERRALS_EX: 7686 /* Not support DFS yet */ 7687 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; 7688 goto out; 7689 case FSCTL_CREATE_OR_GET_OBJECT_ID: 7690 { 7691 struct file_object_buf_type1_ioctl_rsp *obj_buf; 7692 7693 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); 7694 obj_buf = (struct file_object_buf_type1_ioctl_rsp *) 7695 &rsp->Buffer[0]; 7696 7697 /* 7698 * TODO: This is dummy implementation to pass smbtorture 7699 * Need to check correct response later 7700 */ 7701 memset(obj_buf->ObjectId, 0x0, 16); 7702 memset(obj_buf->BirthVolumeId, 0x0, 16); 7703 memset(obj_buf->BirthObjectId, 0x0, 16); 7704 memset(obj_buf->DomainId, 0x0, 16); 7705 7706 break; 7707 } 7708 case FSCTL_PIPE_TRANSCEIVE: 7709 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); 7710 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); 7711 break; 7712 case FSCTL_VALIDATE_NEGOTIATE_INFO: 7713 if (conn->dialect < SMB30_PROT_ID) { 7714 ret = -EOPNOTSUPP; 7715 goto out; 7716 } 7717 7718 if (in_buf_len < offsetof(struct validate_negotiate_info_req, 7719 Dialects)) { 7720 ret = -EINVAL; 7721 goto out; 7722 } 7723 7724 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { 7725 ret = -EINVAL; 7726 goto out; 7727 } 7728 7729 ret = fsctl_validate_negotiate_info(conn, 7730 (struct validate_negotiate_info_req *)&req->Buffer[0], 7731 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], 7732 in_buf_len); 7733 if (ret < 0) 7734 goto out; 7735 7736 nbytes = sizeof(struct validate_negotiate_info_rsp); 7737 rsp->PersistentFileId = SMB2_NO_FID; 7738 rsp->VolatileFileId = SMB2_NO_FID; 7739 break; 7740 case FSCTL_QUERY_NETWORK_INTERFACE_INFO: 7741 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); 7742 if (ret < 0) 7743 goto out; 7744 nbytes = ret; 7745 break; 7746 case FSCTL_REQUEST_RESUME_KEY: 7747 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { 7748 ret = -EINVAL; 7749 goto out; 7750 } 7751 7752 ret = fsctl_request_resume_key(work, req, 7753 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); 7754 if (ret < 0) 7755 goto out; 7756 rsp->PersistentFileId = req->PersistentFileId; 7757 rsp->VolatileFileId = req->VolatileFileId; 7758 nbytes = sizeof(struct resume_key_ioctl_rsp); 7759 break; 7760 case FSCTL_COPYCHUNK: 7761 case FSCTL_COPYCHUNK_WRITE: 7762 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7763 ksmbd_debug(SMB, 7764 "User does not have write permission\n"); 7765 ret = -EACCES; 7766 goto out; 7767 } 7768 7769 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { 7770 ret = -EINVAL; 7771 goto out; 7772 } 7773 7774 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { 7775 ret = -EINVAL; 7776 goto out; 7777 } 7778 7779 nbytes = sizeof(struct copychunk_ioctl_rsp); 7780 rsp->VolatileFileId = req->VolatileFileId; 7781 rsp->PersistentFileId = req->PersistentFileId; 7782 fsctl_copychunk(work, 7783 (struct copychunk_ioctl_req *)&req->Buffer[0], 7784 le32_to_cpu(req->CtlCode), 7785 le32_to_cpu(req->InputCount), 7786 req->VolatileFileId, 7787 req->PersistentFileId, 7788 rsp); 7789 break; 7790 case FSCTL_SET_SPARSE: 7791 if (in_buf_len < sizeof(struct file_sparse)) { 7792 ret = -EINVAL; 7793 goto out; 7794 } 7795 7796 ret = fsctl_set_sparse(work, id, 7797 (struct file_sparse *)&req->Buffer[0]); 7798 if (ret < 0) 7799 goto out; 7800 break; 7801 case FSCTL_SET_ZERO_DATA: 7802 { 7803 struct file_zero_data_information *zero_data; 7804 struct ksmbd_file *fp; 7805 loff_t off, len, bfz; 7806 7807 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { 7808 ksmbd_debug(SMB, 7809 "User does not have write permission\n"); 7810 ret = -EACCES; 7811 goto out; 7812 } 7813 7814 if (in_buf_len < sizeof(struct file_zero_data_information)) { 7815 ret = -EINVAL; 7816 goto out; 7817 } 7818 7819 zero_data = 7820 (struct file_zero_data_information *)&req->Buffer[0]; 7821 7822 off = le64_to_cpu(zero_data->FileOffset); 7823 bfz = le64_to_cpu(zero_data->BeyondFinalZero); 7824 if (off < 0 || bfz < 0 || off > bfz) { 7825 ret = -EINVAL; 7826 goto out; 7827 } 7828 7829 len = bfz - off; 7830 if (len) { 7831 fp = ksmbd_lookup_fd_fast(work, id); 7832 if (!fp) { 7833 ret = -ENOENT; 7834 goto out; 7835 } 7836 7837 ret = ksmbd_vfs_zero_data(work, fp, off, len); 7838 ksmbd_fd_put(work, fp); 7839 if (ret < 0) 7840 goto out; 7841 } 7842 break; 7843 } 7844 case FSCTL_QUERY_ALLOCATED_RANGES: 7845 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { 7846 ret = -EINVAL; 7847 goto out; 7848 } 7849 7850 ret = fsctl_query_allocated_ranges(work, id, 7851 (struct file_allocated_range_buffer *)&req->Buffer[0], 7852 (struct file_allocated_range_buffer *)&rsp->Buffer[0], 7853 out_buf_len / 7854 sizeof(struct file_allocated_range_buffer), &nbytes); 7855 if (ret == -E2BIG) { 7856 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; 7857 } else if (ret < 0) { 7858 nbytes = 0; 7859 goto out; 7860 } 7861 7862 nbytes *= sizeof(struct file_allocated_range_buffer); 7863 break; 7864 case FSCTL_GET_REPARSE_POINT: 7865 { 7866 struct reparse_data_buffer *reparse_ptr; 7867 struct ksmbd_file *fp; 7868 7869 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; 7870 fp = ksmbd_lookup_fd_fast(work, id); 7871 if (!fp) { 7872 pr_err("not found fp!!\n"); 7873 ret = -ENOENT; 7874 goto out; 7875 } 7876 7877 reparse_ptr->ReparseTag = 7878 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); 7879 reparse_ptr->ReparseDataLength = 0; 7880 ksmbd_fd_put(work, fp); 7881 nbytes = sizeof(struct reparse_data_buffer); 7882 break; 7883 } 7884 case FSCTL_DUPLICATE_EXTENTS_TO_FILE: 7885 { 7886 struct ksmbd_file *fp_in, *fp_out = NULL; 7887 struct duplicate_extents_to_file *dup_ext; 7888 loff_t src_off, dst_off, length, cloned; 7889 7890 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { 7891 ret = -EINVAL; 7892 goto out; 7893 } 7894 7895 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0]; 7896 7897 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, 7898 dup_ext->PersistentFileHandle); 7899 if (!fp_in) { 7900 pr_err("not found file handle in duplicate extent to file\n"); 7901 ret = -ENOENT; 7902 goto out; 7903 } 7904 7905 fp_out = ksmbd_lookup_fd_fast(work, id); 7906 if (!fp_out) { 7907 pr_err("not found fp\n"); 7908 ret = -ENOENT; 7909 goto dup_ext_out; 7910 } 7911 7912 src_off = le64_to_cpu(dup_ext->SourceFileOffset); 7913 dst_off = le64_to_cpu(dup_ext->TargetFileOffset); 7914 length = le64_to_cpu(dup_ext->ByteCount); 7915 /* 7916 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE 7917 * should fall back to vfs_copy_file_range(). This could be 7918 * beneficial when re-exporting nfs/smb mount, but note that 7919 * this can result in partial copy that returns an error status. 7920 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, 7921 * fall back to vfs_copy_file_range(), should be avoided when 7922 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. 7923 */ 7924 cloned = vfs_clone_file_range(fp_in->filp, src_off, 7925 fp_out->filp, dst_off, length, 0); 7926 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { 7927 ret = -EOPNOTSUPP; 7928 goto dup_ext_out; 7929 } else if (cloned != length) { 7930 cloned = vfs_copy_file_range(fp_in->filp, src_off, 7931 fp_out->filp, dst_off, 7932 length, 0); 7933 if (cloned != length) { 7934 if (cloned < 0) 7935 ret = cloned; 7936 else 7937 ret = -EINVAL; 7938 } 7939 } 7940 7941dup_ext_out: 7942 ksmbd_fd_put(work, fp_in); 7943 ksmbd_fd_put(work, fp_out); 7944 if (ret < 0) 7945 goto out; 7946 break; 7947 } 7948 default: 7949 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", 7950 cnt_code); 7951 ret = -EOPNOTSUPP; 7952 goto out; 7953 } 7954 7955 rsp->CtlCode = cpu_to_le32(cnt_code); 7956 rsp->InputCount = cpu_to_le32(0); 7957 rsp->InputOffset = cpu_to_le32(112); 7958 rsp->OutputOffset = cpu_to_le32(112); 7959 rsp->OutputCount = cpu_to_le32(nbytes); 7960 rsp->StructureSize = cpu_to_le16(49); 7961 rsp->Reserved = cpu_to_le16(0); 7962 rsp->Flags = cpu_to_le32(0); 7963 rsp->Reserved2 = cpu_to_le32(0); 7964 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); 7965 if (!ret) 7966 return ret; 7967 7968out: 7969 if (ret == -EACCES) 7970 rsp->hdr.Status = STATUS_ACCESS_DENIED; 7971 else if (ret == -ENOENT) 7972 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; 7973 else if (ret == -EOPNOTSUPP) 7974 rsp->hdr.Status = STATUS_NOT_SUPPORTED; 7975 else if (ret == -ENOSPC) 7976 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; 7977 else if (ret < 0 || rsp->hdr.Status == 0) 7978 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 7979 smb2_set_err_rsp(work); 7980 return 0; 7981} 7982 7983/** 7984 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command 7985 * @work: smb work containing oplock break command buffer 7986 * 7987 * Return: 0 7988 */ 7989static void smb20_oplock_break_ack(struct ksmbd_work *work) 7990{ 7991 struct smb2_oplock_break *req; 7992 struct smb2_oplock_break *rsp; 7993 struct ksmbd_file *fp; 7994 struct oplock_info *opinfo = NULL; 7995 __le32 err = 0; 7996 int ret = 0; 7997 u64 volatile_id, persistent_id; 7998 char req_oplevel = 0, rsp_oplevel = 0; 7999 unsigned int oplock_change_type; 8000 8001 WORK_BUFFERS(work, req, rsp); 8002 8003 volatile_id = req->VolatileFid; 8004 persistent_id = req->PersistentFid; 8005 req_oplevel = req->OplockLevel; 8006 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", 8007 volatile_id, persistent_id, req_oplevel); 8008 8009 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); 8010 if (!fp) { 8011 rsp->hdr.Status = STATUS_FILE_CLOSED; 8012 smb2_set_err_rsp(work); 8013 return; 8014 } 8015 8016 opinfo = opinfo_get(fp); 8017 if (!opinfo) { 8018 pr_err("unexpected null oplock_info\n"); 8019 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8020 smb2_set_err_rsp(work); 8021 ksmbd_fd_put(work, fp); 8022 return; 8023 } 8024 8025 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { 8026 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; 8027 goto err_out; 8028 } 8029 8030 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8031 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); 8032 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8033 goto err_out; 8034 } 8035 8036 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8037 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8038 (req_oplevel != SMB2_OPLOCK_LEVEL_II && 8039 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { 8040 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8041 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8042 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8043 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { 8044 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8045 oplock_change_type = OPLOCK_READ_TO_NONE; 8046 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || 8047 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8048 err = STATUS_INVALID_DEVICE_STATE; 8049 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8050 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8051 req_oplevel == SMB2_OPLOCK_LEVEL_II) { 8052 oplock_change_type = OPLOCK_WRITE_TO_READ; 8053 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || 8054 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && 8055 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8056 oplock_change_type = OPLOCK_WRITE_TO_NONE; 8057 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && 8058 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { 8059 oplock_change_type = OPLOCK_READ_TO_NONE; 8060 } else { 8061 oplock_change_type = 0; 8062 } 8063 } else { 8064 oplock_change_type = 0; 8065 } 8066 8067 switch (oplock_change_type) { 8068 case OPLOCK_WRITE_TO_READ: 8069 ret = opinfo_write_to_read(opinfo); 8070 rsp_oplevel = SMB2_OPLOCK_LEVEL_II; 8071 break; 8072 case OPLOCK_WRITE_TO_NONE: 8073 ret = opinfo_write_to_none(opinfo); 8074 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8075 break; 8076 case OPLOCK_READ_TO_NONE: 8077 ret = opinfo_read_to_none(opinfo); 8078 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; 8079 break; 8080 default: 8081 pr_err("unknown oplock change 0x%x -> 0x%x\n", 8082 opinfo->level, rsp_oplevel); 8083 } 8084 8085 if (ret < 0) { 8086 rsp->hdr.Status = err; 8087 goto err_out; 8088 } 8089 8090 opinfo->op_state = OPLOCK_STATE_NONE; 8091 wake_up_interruptible_all(&opinfo->oplock_q); 8092 opinfo_put(opinfo); 8093 ksmbd_fd_put(work, fp); 8094 8095 rsp->StructureSize = cpu_to_le16(24); 8096 rsp->OplockLevel = rsp_oplevel; 8097 rsp->Reserved = 0; 8098 rsp->Reserved2 = 0; 8099 rsp->VolatileFid = volatile_id; 8100 rsp->PersistentFid = persistent_id; 8101 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); 8102 if (!ret) 8103 return; 8104 8105err_out: 8106 opinfo->op_state = OPLOCK_STATE_NONE; 8107 wake_up_interruptible_all(&opinfo->oplock_q); 8108 8109 opinfo_put(opinfo); 8110 ksmbd_fd_put(work, fp); 8111 smb2_set_err_rsp(work); 8112} 8113 8114static int check_lease_state(struct lease *lease, __le32 req_state) 8115{ 8116 if ((lease->new_state == 8117 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && 8118 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { 8119 lease->new_state = req_state; 8120 return 0; 8121 } 8122 8123 if (lease->new_state == req_state) 8124 return 0; 8125 8126 return 1; 8127} 8128 8129/** 8130 * smb21_lease_break_ack() - handler for smb2.1 lease break command 8131 * @work: smb work containing lease break command buffer 8132 * 8133 * Return: 0 8134 */ 8135static void smb21_lease_break_ack(struct ksmbd_work *work) 8136{ 8137 struct ksmbd_conn *conn = work->conn; 8138 struct smb2_lease_ack *req; 8139 struct smb2_lease_ack *rsp; 8140 struct oplock_info *opinfo; 8141 __le32 err = 0; 8142 int ret = 0; 8143 unsigned int lease_change_type; 8144 __le32 lease_state; 8145 struct lease *lease; 8146 8147 WORK_BUFFERS(work, req, rsp); 8148 8149 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", 8150 le32_to_cpu(req->LeaseState)); 8151 opinfo = lookup_lease_in_table(conn, req->LeaseKey); 8152 if (!opinfo) { 8153 ksmbd_debug(OPLOCK, "file not opened\n"); 8154 smb2_set_err_rsp(work); 8155 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8156 return; 8157 } 8158 lease = opinfo->o_lease; 8159 8160 if (opinfo->op_state == OPLOCK_STATE_NONE) { 8161 pr_err("unexpected lease break state 0x%x\n", 8162 opinfo->op_state); 8163 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8164 goto err_out; 8165 } 8166 8167 if (check_lease_state(lease, req->LeaseState)) { 8168 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; 8169 ksmbd_debug(OPLOCK, 8170 "req lease state: 0x%x, expected state: 0x%x\n", 8171 req->LeaseState, lease->new_state); 8172 goto err_out; 8173 } 8174 8175 if (!atomic_read(&opinfo->breaking_cnt)) { 8176 rsp->hdr.Status = STATUS_UNSUCCESSFUL; 8177 goto err_out; 8178 } 8179 8180 /* check for bad lease state */ 8181 if (req->LeaseState & 8182 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { 8183 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8184 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8185 lease_change_type = OPLOCK_WRITE_TO_NONE; 8186 else 8187 lease_change_type = OPLOCK_READ_TO_NONE; 8188 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8189 le32_to_cpu(lease->state), 8190 le32_to_cpu(req->LeaseState)); 8191 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && 8192 req->LeaseState != SMB2_LEASE_NONE_LE) { 8193 err = STATUS_INVALID_OPLOCK_PROTOCOL; 8194 lease_change_type = OPLOCK_READ_TO_NONE; 8195 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", 8196 le32_to_cpu(lease->state), 8197 le32_to_cpu(req->LeaseState)); 8198 } else { 8199 /* valid lease state changes */ 8200 err = STATUS_INVALID_DEVICE_STATE; 8201 if (req->LeaseState == SMB2_LEASE_NONE_LE) { 8202 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8203 lease_change_type = OPLOCK_WRITE_TO_NONE; 8204 else 8205 lease_change_type = OPLOCK_READ_TO_NONE; 8206 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { 8207 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) 8208 lease_change_type = OPLOCK_WRITE_TO_READ; 8209 else 8210 lease_change_type = OPLOCK_READ_HANDLE_TO_READ; 8211 } else { 8212 lease_change_type = 0; 8213 } 8214 } 8215 8216 switch (lease_change_type) { 8217 case OPLOCK_WRITE_TO_READ: 8218 ret = opinfo_write_to_read(opinfo); 8219 break; 8220 case OPLOCK_READ_HANDLE_TO_READ: 8221 ret = opinfo_read_handle_to_read(opinfo); 8222 break; 8223 case OPLOCK_WRITE_TO_NONE: 8224 ret = opinfo_write_to_none(opinfo); 8225 break; 8226 case OPLOCK_READ_TO_NONE: 8227 ret = opinfo_read_to_none(opinfo); 8228 break; 8229 default: 8230 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", 8231 le32_to_cpu(lease->state), 8232 le32_to_cpu(req->LeaseState)); 8233 } 8234 8235 if (ret < 0) { 8236 rsp->hdr.Status = err; 8237 goto err_out; 8238 } 8239 8240 lease_state = lease->state; 8241 opinfo->op_state = OPLOCK_STATE_NONE; 8242 wake_up_interruptible_all(&opinfo->oplock_q); 8243 atomic_dec(&opinfo->breaking_cnt); 8244 wake_up_interruptible_all(&opinfo->oplock_brk); 8245 opinfo_put(opinfo); 8246 8247 rsp->StructureSize = cpu_to_le16(36); 8248 rsp->Reserved = 0; 8249 rsp->Flags = 0; 8250 memcpy(rsp->LeaseKey, req->LeaseKey, 16); 8251 rsp->LeaseState = lease_state; 8252 rsp->LeaseDuration = 0; 8253 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); 8254 if (!ret) 8255 return; 8256 8257err_out: 8258 wake_up_interruptible_all(&opinfo->oplock_q); 8259 atomic_dec(&opinfo->breaking_cnt); 8260 wake_up_interruptible_all(&opinfo->oplock_brk); 8261 8262 opinfo_put(opinfo); 8263 smb2_set_err_rsp(work); 8264} 8265 8266/** 8267 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break 8268 * @work: smb work containing oplock/lease break command buffer 8269 * 8270 * Return: 0 8271 */ 8272int smb2_oplock_break(struct ksmbd_work *work) 8273{ 8274 struct smb2_oplock_break *req; 8275 struct smb2_oplock_break *rsp; 8276 8277 WORK_BUFFERS(work, req, rsp); 8278 8279 switch (le16_to_cpu(req->StructureSize)) { 8280 case OP_BREAK_STRUCT_SIZE_20: 8281 smb20_oplock_break_ack(work); 8282 break; 8283 case OP_BREAK_STRUCT_SIZE_21: 8284 smb21_lease_break_ack(work); 8285 break; 8286 default: 8287 ksmbd_debug(OPLOCK, "invalid break cmd %d\n", 8288 le16_to_cpu(req->StructureSize)); 8289 rsp->hdr.Status = STATUS_INVALID_PARAMETER; 8290 smb2_set_err_rsp(work); 8291 } 8292 8293 return 0; 8294} 8295 8296/** 8297 * smb2_notify() - handler for smb2 notify request 8298 * @work: smb work containing notify command buffer 8299 * 8300 * Return: 0 8301 */ 8302int smb2_notify(struct ksmbd_work *work) 8303{ 8304 struct smb2_change_notify_req *req; 8305 struct smb2_change_notify_rsp *rsp; 8306 8307 WORK_BUFFERS(work, req, rsp); 8308 8309 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { 8310 rsp->hdr.Status = STATUS_INTERNAL_ERROR; 8311 smb2_set_err_rsp(work); 8312 return 0; 8313 } 8314 8315 smb2_set_err_rsp(work); 8316 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; 8317 return 0; 8318} 8319 8320/** 8321 * smb2_is_sign_req() - handler for checking packet signing status 8322 * @work: smb work containing notify command buffer 8323 * @command: SMB2 command id 8324 * 8325 * Return: true if packed is signed, false otherwise 8326 */ 8327bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) 8328{ 8329 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); 8330 8331 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && 8332 command != SMB2_NEGOTIATE_HE && 8333 command != SMB2_SESSION_SETUP_HE && 8334 command != SMB2_OPLOCK_BREAK_HE) 8335 return true; 8336 8337 return false; 8338} 8339 8340/** 8341 * smb2_check_sign_req() - handler for req packet sign processing 8342 * @work: smb work containing notify command buffer 8343 * 8344 * Return: 1 on success, 0 otherwise 8345 */ 8346int smb2_check_sign_req(struct ksmbd_work *work) 8347{ 8348 struct smb2_hdr *hdr; 8349 char signature_req[SMB2_SIGNATURE_SIZE]; 8350 char signature[SMB2_HMACSHA256_SIZE]; 8351 struct kvec iov[1]; 8352 size_t len; 8353 8354 hdr = smb2_get_msg(work->request_buf); 8355 if (work->next_smb2_rcv_hdr_off) 8356 hdr = ksmbd_req_buf_next(work); 8357 8358 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8359 len = get_rfc1002_len(work->request_buf); 8360 else if (hdr->NextCommand) 8361 len = le32_to_cpu(hdr->NextCommand); 8362 else 8363 len = get_rfc1002_len(work->request_buf) - 8364 work->next_smb2_rcv_hdr_off; 8365 8366 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8367 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8368 8369 iov[0].iov_base = (char *)&hdr->ProtocolId; 8370 iov[0].iov_len = len; 8371 8372 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, 8373 signature)) 8374 return 0; 8375 8376 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8377 pr_err("bad smb2 signature\n"); 8378 return 0; 8379 } 8380 8381 return 1; 8382} 8383 8384/** 8385 * smb2_set_sign_rsp() - handler for rsp packet sign processing 8386 * @work: smb work containing notify command buffer 8387 * 8388 */ 8389void smb2_set_sign_rsp(struct ksmbd_work *work) 8390{ 8391 struct smb2_hdr *hdr; 8392 char signature[SMB2_HMACSHA256_SIZE]; 8393 struct kvec *iov; 8394 int n_vec = 1; 8395 8396 hdr = ksmbd_resp_buf_curr(work); 8397 hdr->Flags |= SMB2_FLAGS_SIGNED; 8398 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8399 8400 if (hdr->Command == SMB2_READ) { 8401 iov = &work->iov[work->iov_idx - 1]; 8402 n_vec++; 8403 } else { 8404 iov = &work->iov[work->iov_idx]; 8405 } 8406 8407 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, 8408 signature)) 8409 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8410} 8411 8412/** 8413 * smb3_check_sign_req() - handler for req packet sign processing 8414 * @work: smb work containing notify command buffer 8415 * 8416 * Return: 1 on success, 0 otherwise 8417 */ 8418int smb3_check_sign_req(struct ksmbd_work *work) 8419{ 8420 struct ksmbd_conn *conn = work->conn; 8421 char *signing_key; 8422 struct smb2_hdr *hdr; 8423 struct channel *chann; 8424 char signature_req[SMB2_SIGNATURE_SIZE]; 8425 char signature[SMB2_CMACAES_SIZE]; 8426 struct kvec iov[1]; 8427 size_t len; 8428 8429 hdr = smb2_get_msg(work->request_buf); 8430 if (work->next_smb2_rcv_hdr_off) 8431 hdr = ksmbd_req_buf_next(work); 8432 8433 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) 8434 len = get_rfc1002_len(work->request_buf); 8435 else if (hdr->NextCommand) 8436 len = le32_to_cpu(hdr->NextCommand); 8437 else 8438 len = get_rfc1002_len(work->request_buf) - 8439 work->next_smb2_rcv_hdr_off; 8440 8441 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8442 signing_key = work->sess->smb3signingkey; 8443 } else { 8444 chann = lookup_chann_list(work->sess, conn); 8445 if (!chann) { 8446 return 0; 8447 } 8448 signing_key = chann->smb3signingkey; 8449 } 8450 8451 if (!signing_key) { 8452 pr_err("SMB3 signing key is not generated\n"); 8453 return 0; 8454 } 8455 8456 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); 8457 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8458 iov[0].iov_base = (char *)&hdr->ProtocolId; 8459 iov[0].iov_len = len; 8460 8461 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) 8462 return 0; 8463 8464 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { 8465 pr_err("bad smb2 signature\n"); 8466 return 0; 8467 } 8468 8469 return 1; 8470} 8471 8472/** 8473 * smb3_set_sign_rsp() - handler for rsp packet sign processing 8474 * @work: smb work containing notify command buffer 8475 * 8476 */ 8477void smb3_set_sign_rsp(struct ksmbd_work *work) 8478{ 8479 struct ksmbd_conn *conn = work->conn; 8480 struct smb2_hdr *hdr; 8481 struct channel *chann; 8482 char signature[SMB2_CMACAES_SIZE]; 8483 struct kvec *iov; 8484 int n_vec = 1; 8485 char *signing_key; 8486 8487 hdr = ksmbd_resp_buf_curr(work); 8488 8489 if (conn->binding == false && 8490 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { 8491 signing_key = work->sess->smb3signingkey; 8492 } else { 8493 chann = lookup_chann_list(work->sess, work->conn); 8494 if (!chann) { 8495 return; 8496 } 8497 signing_key = chann->smb3signingkey; 8498 } 8499 8500 if (!signing_key) 8501 return; 8502 8503 hdr->Flags |= SMB2_FLAGS_SIGNED; 8504 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); 8505 8506 if (hdr->Command == SMB2_READ) { 8507 iov = &work->iov[work->iov_idx - 1]; 8508 n_vec++; 8509 } else { 8510 iov = &work->iov[work->iov_idx]; 8511 } 8512 8513 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, 8514 signature)) 8515 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); 8516} 8517 8518/** 8519 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response 8520 * @work: smb work containing response buffer 8521 * 8522 */ 8523void smb3_preauth_hash_rsp(struct ksmbd_work *work) 8524{ 8525 struct ksmbd_conn *conn = work->conn; 8526 struct ksmbd_session *sess = work->sess; 8527 struct smb2_hdr *req, *rsp; 8528 8529 if (conn->dialect != SMB311_PROT_ID) 8530 return; 8531 8532 WORK_BUFFERS(work, req, rsp); 8533 8534 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && 8535 conn->preauth_info) 8536 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8537 conn->preauth_info->Preauth_HashValue); 8538 8539 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { 8540 __u8 *hash_value; 8541 8542 if (conn->binding) { 8543 struct preauth_session *preauth_sess; 8544 8545 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); 8546 if (!preauth_sess) 8547 return; 8548 hash_value = preauth_sess->Preauth_HashValue; 8549 } else { 8550 hash_value = sess->Preauth_HashValue; 8551 if (!hash_value) 8552 return; 8553 } 8554 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, 8555 hash_value); 8556 } 8557} 8558 8559static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) 8560{ 8561 struct smb2_transform_hdr *tr_hdr = tr_buf + 4; 8562 struct smb2_hdr *hdr = smb2_get_msg(old_buf); 8563 unsigned int orig_len = get_rfc1002_len(old_buf); 8564 8565 /* tr_buf must be cleared by the caller */ 8566 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; 8567 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); 8568 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); 8569 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || 8570 cipher_type == SMB2_ENCRYPTION_AES256_GCM) 8571 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); 8572 else 8573 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); 8574 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); 8575 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); 8576 inc_rfc1001_len(tr_buf, orig_len); 8577} 8578 8579int smb3_encrypt_resp(struct ksmbd_work *work) 8580{ 8581 struct kvec *iov = work->iov; 8582 int rc = -ENOMEM; 8583 void *tr_buf; 8584 8585 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); 8586 if (!tr_buf) 8587 return rc; 8588 8589 /* fill transform header */ 8590 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); 8591 8592 iov[0].iov_base = tr_buf; 8593 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8594 work->tr_buf = tr_buf; 8595 8596 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); 8597} 8598 8599bool smb3_is_transform_hdr(void *buf) 8600{ 8601 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); 8602 8603 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; 8604} 8605 8606int smb3_decrypt_req(struct ksmbd_work *work) 8607{ 8608 struct ksmbd_session *sess; 8609 char *buf = work->request_buf; 8610 unsigned int pdu_length = get_rfc1002_len(buf); 8611 struct kvec iov[2]; 8612 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); 8613 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); 8614 int rc = 0; 8615 8616 if (pdu_length < sizeof(struct smb2_transform_hdr) || 8617 buf_data_size < sizeof(struct smb2_hdr)) { 8618 pr_err("Transform message is too small (%u)\n", 8619 pdu_length); 8620 return -ECONNABORTED; 8621 } 8622 8623 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { 8624 pr_err("Transform message is broken\n"); 8625 return -ECONNABORTED; 8626 } 8627 8628 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); 8629 if (!sess) { 8630 pr_err("invalid session id(%llx) in transform header\n", 8631 le64_to_cpu(tr_hdr->SessionId)); 8632 return -ECONNABORTED; 8633 } 8634 8635 iov[0].iov_base = buf; 8636 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; 8637 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; 8638 iov[1].iov_len = buf_data_size; 8639 rc = ksmbd_crypt_message(work, iov, 2, 0); 8640 if (rc) 8641 return rc; 8642 8643 memmove(buf + 4, iov[1].iov_base, buf_data_size); 8644 *(__be32 *)buf = cpu_to_be32(buf_data_size); 8645 8646 return rc; 8647} 8648 8649bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) 8650{ 8651 struct ksmbd_conn *conn = work->conn; 8652 struct ksmbd_session *sess = work->sess; 8653 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); 8654 8655 if (conn->dialect < SMB30_PROT_ID) 8656 return false; 8657 8658 if (work->next_smb2_rcv_hdr_off) 8659 rsp = ksmbd_resp_buf_next(work); 8660 8661 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && 8662 sess->user && !user_guest(sess->user) && 8663 rsp->Status == STATUS_SUCCESS) 8664 return true; 8665 return false; 8666} 8667