1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * fs/cifs_debug.c 4 * 5 * Copyright (C) International Business Machines Corp., 2000,2005 6 * 7 * Modified by Steve French (sfrench@us.ibm.com) 8 */ 9#include <linux/fs.h> 10#include <linux/string.h> 11#include <linux/ctype.h> 12#include <linux/module.h> 13#include <linux/proc_fs.h> 14#include <linux/uaccess.h> 15#include "cifspdu.h" 16#include "cifsglob.h" 17#include "cifsproto.h" 18#include "cifs_debug.h" 19#include "cifsfs.h" 20#ifdef CONFIG_CIFS_DFS_UPCALL 21#include "dfs_cache.h" 22#endif 23#ifdef CONFIG_CIFS_SMB_DIRECT 24#include "smbdirect.h" 25#endif 26 27void 28cifs_dump_mem(char *label, void *data, int length) 29{ 30 pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data); 31 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4, 32 data, length, true); 33} 34 35void cifs_dump_detail(void *buf, struct TCP_Server_Info *server) 36{ 37#ifdef CONFIG_CIFS_DEBUG2 38 struct smb_hdr *smb = (struct smb_hdr *)buf; 39 40 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n", 41 smb->Command, smb->Status.CifsError, 42 smb->Flags, smb->Flags2, smb->Mid, smb->Pid); 43 cifs_dbg(VFS, "smb buf %p len %u\n", smb, 44 server->ops->calc_smb_size(smb, server)); 45#endif /* CONFIG_CIFS_DEBUG2 */ 46} 47 48void cifs_dump_mids(struct TCP_Server_Info *server) 49{ 50#ifdef CONFIG_CIFS_DEBUG2 51 struct list_head *tmp; 52 struct mid_q_entry *mid_entry; 53 54 if (server == NULL) 55 return; 56 57 cifs_dbg(VFS, "Dump pending requests:\n"); 58 spin_lock(&GlobalMid_Lock); 59 list_for_each(tmp, &server->pending_mid_q) { 60 mid_entry = list_entry(tmp, struct mid_q_entry, qhead); 61 cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n", 62 mid_entry->mid_state, 63 le16_to_cpu(mid_entry->command), 64 mid_entry->pid, 65 mid_entry->callback_data, 66 mid_entry->mid); 67#ifdef CONFIG_CIFS_STATS2 68 cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n", 69 mid_entry->large_buf, 70 mid_entry->resp_buf, 71 mid_entry->when_received, 72 jiffies); 73#endif /* STATS2 */ 74 cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n", 75 mid_entry->multiRsp, mid_entry->multiEnd); 76 if (mid_entry->resp_buf) { 77 cifs_dump_detail(mid_entry->resp_buf, server); 78 cifs_dump_mem("existing buf: ", 79 mid_entry->resp_buf, 62); 80 } 81 } 82 spin_unlock(&GlobalMid_Lock); 83#endif /* CONFIG_CIFS_DEBUG2 */ 84} 85 86#ifdef CONFIG_PROC_FS 87static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon) 88{ 89 __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); 90 91 seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count); 92 if (tcon->nativeFileSystem) 93 seq_printf(m, "Type: %s ", tcon->nativeFileSystem); 94 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d", 95 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), 96 le32_to_cpu(tcon->fsAttrInfo.Attributes), 97 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), 98 tcon->tidStatus); 99 if (dev_type == FILE_DEVICE_DISK) 100 seq_puts(m, " type: DISK "); 101 else if (dev_type == FILE_DEVICE_CD_ROM) 102 seq_puts(m, " type: CDROM "); 103 else 104 seq_printf(m, " type: %d ", dev_type); 105 106 seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number); 107 108 if ((tcon->seal) || 109 (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || 110 (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) 111 seq_printf(m, " Encrypted"); 112 if (tcon->nocase) 113 seq_printf(m, " nocase"); 114 if (tcon->unix_ext) 115 seq_printf(m, " POSIX Extensions"); 116 if (tcon->ses->server->ops->dump_share_caps) 117 tcon->ses->server->ops->dump_share_caps(m, tcon); 118 119 if (tcon->need_reconnect) 120 seq_puts(m, "\tDISCONNECTED "); 121 seq_putc(m, '\n'); 122} 123 124static void 125cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) 126{ 127 struct TCP_Server_Info *server = chan->server; 128 129 seq_printf(m, "\t\tChannel %d Number of credits: %d Dialect 0x%x " 130 "TCP status: %d Instance: %d Local Users To Server: %d " 131 "SecMode: 0x%x Req On Wire: %d In Send: %d " 132 "In MaxReq Wait: %d\n", 133 i+1, 134 server->credits, 135 server->dialect, 136 server->tcpStatus, 137 server->reconnect_instance, 138 server->srv_count, 139 server->sec_mode, 140 in_flight(server), 141 atomic_read(&server->in_send), 142 atomic_read(&server->num_waiters)); 143} 144 145static void 146cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface) 147{ 148 struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; 149 struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; 150 151 seq_printf(m, "\tSpeed: %zu bps\n", iface->speed); 152 seq_puts(m, "\t\tCapabilities: "); 153 if (iface->rdma_capable) 154 seq_puts(m, "rdma "); 155 if (iface->rss_capable) 156 seq_puts(m, "rss "); 157 seq_putc(m, '\n'); 158 if (iface->sockaddr.ss_family == AF_INET) 159 seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr); 160 else if (iface->sockaddr.ss_family == AF_INET6) 161 seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr); 162} 163 164static int cifs_debug_files_proc_show(struct seq_file *m, void *v) 165{ 166 struct list_head *stmp, *tmp, *tmp1, *tmp2; 167 struct TCP_Server_Info *server; 168 struct cifs_ses *ses; 169 struct cifs_tcon *tcon; 170 struct cifsFileInfo *cfile; 171 172 seq_puts(m, "# Version:1\n"); 173 seq_puts(m, "# Format:\n"); 174 seq_puts(m, "# <tree id> <persistent fid> <flags> <count> <pid> <uid>"); 175#ifdef CONFIG_CIFS_DEBUG2 176 seq_printf(m, " <filename> <mid>\n"); 177#else 178 seq_printf(m, " <filename>\n"); 179#endif /* CIFS_DEBUG2 */ 180 spin_lock(&cifs_tcp_ses_lock); 181 list_for_each(stmp, &cifs_tcp_ses_list) { 182 server = list_entry(stmp, struct TCP_Server_Info, 183 tcp_ses_list); 184 list_for_each(tmp, &server->smb_ses_list) { 185 ses = list_entry(tmp, struct cifs_ses, smb_ses_list); 186 list_for_each(tmp1, &ses->tcon_list) { 187 tcon = list_entry(tmp1, struct cifs_tcon, tcon_list); 188 spin_lock(&tcon->open_file_lock); 189 list_for_each(tmp2, &tcon->openFileList) { 190 cfile = list_entry(tmp2, struct cifsFileInfo, 191 tlist); 192 seq_printf(m, 193 "0x%x 0x%llx 0x%x %d %d %d %s", 194 tcon->tid, 195 cfile->fid.persistent_fid, 196 cfile->f_flags, 197 cfile->count, 198 cfile->pid, 199 from_kuid(&init_user_ns, cfile->uid), 200 cfile->dentry->d_name.name); 201#ifdef CONFIG_CIFS_DEBUG2 202 seq_printf(m, " 0x%llx\n", cfile->fid.mid); 203#else 204 seq_printf(m, "\n"); 205#endif /* CIFS_DEBUG2 */ 206 } 207 spin_unlock(&tcon->open_file_lock); 208 } 209 } 210 } 211 spin_unlock(&cifs_tcp_ses_lock); 212 seq_putc(m, '\n'); 213 return 0; 214} 215 216static int cifs_debug_data_proc_show(struct seq_file *m, void *v) 217{ 218 struct list_head *tmp1, *tmp2, *tmp3; 219 struct mid_q_entry *mid_entry; 220 struct TCP_Server_Info *server; 221 struct cifs_ses *ses; 222 struct cifs_tcon *tcon; 223 int i, j; 224 225 seq_puts(m, 226 "Display Internal CIFS Data Structures for Debugging\n" 227 "---------------------------------------------------\n"); 228 seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); 229 seq_printf(m, "Features:"); 230#ifdef CONFIG_CIFS_DFS_UPCALL 231 seq_printf(m, " DFS"); 232#endif 233#ifdef CONFIG_CIFS_FSCACHE 234 seq_printf(m, ",FSCACHE"); 235#endif 236#ifdef CONFIG_CIFS_SMB_DIRECT 237 seq_printf(m, ",SMB_DIRECT"); 238#endif 239#ifdef CONFIG_CIFS_STATS2 240 seq_printf(m, ",STATS2"); 241#else 242 seq_printf(m, ",STATS"); 243#endif 244#ifdef CONFIG_CIFS_DEBUG2 245 seq_printf(m, ",DEBUG2"); 246#elif defined(CONFIG_CIFS_DEBUG) 247 seq_printf(m, ",DEBUG"); 248#endif 249#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY 250 seq_printf(m, ",ALLOW_INSECURE_LEGACY"); 251#endif 252#ifdef CONFIG_CIFS_WEAK_PW_HASH 253 seq_printf(m, ",WEAK_PW_HASH"); 254#endif 255#ifdef CONFIG_CIFS_POSIX 256 seq_printf(m, ",CIFS_POSIX"); 257#endif 258#ifdef CONFIG_CIFS_UPCALL 259 seq_printf(m, ",UPCALL(SPNEGO)"); 260#endif 261#ifdef CONFIG_CIFS_XATTR 262 seq_printf(m, ",XATTR"); 263#endif 264 seq_printf(m, ",ACL"); 265 seq_putc(m, '\n'); 266 seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize); 267 seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); 268 seq_printf(m, "Servers:"); 269 270 i = 0; 271 spin_lock(&cifs_tcp_ses_lock); 272 list_for_each(tmp1, &cifs_tcp_ses_list) { 273 server = list_entry(tmp1, struct TCP_Server_Info, 274 tcp_ses_list); 275 276#ifdef CONFIG_CIFS_SMB_DIRECT 277 if (!server->rdma) 278 goto skip_rdma; 279 280 if (!server->smbd_conn) { 281 seq_printf(m, "\nSMBDirect transport not available"); 282 goto skip_rdma; 283 } 284 285 seq_printf(m, "\nSMBDirect (in hex) protocol version: %x " 286 "transport status: %x", 287 server->smbd_conn->protocol, 288 server->smbd_conn->transport_status); 289 seq_printf(m, "\nConn receive_credit_max: %x " 290 "send_credit_target: %x max_send_size: %x", 291 server->smbd_conn->receive_credit_max, 292 server->smbd_conn->send_credit_target, 293 server->smbd_conn->max_send_size); 294 seq_printf(m, "\nConn max_fragmented_recv_size: %x " 295 "max_fragmented_send_size: %x max_receive_size:%x", 296 server->smbd_conn->max_fragmented_recv_size, 297 server->smbd_conn->max_fragmented_send_size, 298 server->smbd_conn->max_receive_size); 299 seq_printf(m, "\nConn keep_alive_interval: %x " 300 "max_readwrite_size: %x rdma_readwrite_threshold: %x", 301 server->smbd_conn->keep_alive_interval, 302 server->smbd_conn->max_readwrite_size, 303 server->smbd_conn->rdma_readwrite_threshold); 304 seq_printf(m, "\nDebug count_get_receive_buffer: %x " 305 "count_put_receive_buffer: %x count_send_empty: %x", 306 server->smbd_conn->count_get_receive_buffer, 307 server->smbd_conn->count_put_receive_buffer, 308 server->smbd_conn->count_send_empty); 309 seq_printf(m, "\nRead Queue count_reassembly_queue: %x " 310 "count_enqueue_reassembly_queue: %x " 311 "count_dequeue_reassembly_queue: %x " 312 "fragment_reassembly_remaining: %x " 313 "reassembly_data_length: %x " 314 "reassembly_queue_length: %x", 315 server->smbd_conn->count_reassembly_queue, 316 server->smbd_conn->count_enqueue_reassembly_queue, 317 server->smbd_conn->count_dequeue_reassembly_queue, 318 server->smbd_conn->fragment_reassembly_remaining, 319 server->smbd_conn->reassembly_data_length, 320 server->smbd_conn->reassembly_queue_length); 321 seq_printf(m, "\nCurrent Credits send_credits: %x " 322 "receive_credits: %x receive_credit_target: %x", 323 atomic_read(&server->smbd_conn->send_credits), 324 atomic_read(&server->smbd_conn->receive_credits), 325 server->smbd_conn->receive_credit_target); 326 seq_printf(m, "\nPending send_pending: %x ", 327 atomic_read(&server->smbd_conn->send_pending)); 328 seq_printf(m, "\nReceive buffers count_receive_queue: %x " 329 "count_empty_packet_queue: %x", 330 server->smbd_conn->count_receive_queue, 331 server->smbd_conn->count_empty_packet_queue); 332 seq_printf(m, "\nMR responder_resources: %x " 333 "max_frmr_depth: %x mr_type: %x", 334 server->smbd_conn->responder_resources, 335 server->smbd_conn->max_frmr_depth, 336 server->smbd_conn->mr_type); 337 seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x", 338 atomic_read(&server->smbd_conn->mr_ready_count), 339 atomic_read(&server->smbd_conn->mr_used_count)); 340skip_rdma: 341#endif 342 seq_printf(m, "\nNumber of credits: %d Dialect 0x%x", 343 server->credits, server->dialect); 344 if (server->compress_algorithm == SMB3_COMPRESS_LZNT1) 345 seq_printf(m, " COMPRESS_LZNT1"); 346 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77) 347 seq_printf(m, " COMPRESS_LZ77"); 348 else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF) 349 seq_printf(m, " COMPRESS_LZ77_HUFF"); 350 if (server->sign) 351 seq_printf(m, " signed"); 352 if (server->posix_ext_supported) 353 seq_printf(m, " posix"); 354 355 i++; 356 list_for_each(tmp2, &server->smb_ses_list) { 357 ses = list_entry(tmp2, struct cifs_ses, 358 smb_ses_list); 359 if ((ses->serverDomain == NULL) || 360 (ses->serverOS == NULL) || 361 (ses->serverNOS == NULL)) { 362 seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d ", 363 i, ses->serverName, ses->ses_count, 364 ses->capabilities, ses->status); 365 if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) 366 seq_printf(m, "Guest\t"); 367 else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) 368 seq_printf(m, "Anonymous\t"); 369 } else { 370 seq_printf(m, 371 "\n%d) Name: %s Domain: %s Uses: %d OS:" 372 " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB" 373 " session status: %d ", 374 i, ses->serverName, ses->serverDomain, 375 ses->ses_count, ses->serverOS, ses->serverNOS, 376 ses->capabilities, ses->status); 377 } 378 379 seq_printf(m,"Security type: %s\n", 380 get_security_type_str(server->ops->select_sectype(server, ses->sectype))); 381 382 if (server->rdma) 383 seq_printf(m, "RDMA\n\t"); 384 seq_printf(m, "TCP status: %d Instance: %d\n\tLocal Users To " 385 "Server: %d SecMode: 0x%x Req On Wire: %d", 386 server->tcpStatus, 387 server->reconnect_instance, 388 server->srv_count, 389 server->sec_mode, in_flight(server)); 390 391 seq_printf(m, " In Send: %d In MaxReq Wait: %d", 392 atomic_read(&server->in_send), 393 atomic_read(&server->num_waiters)); 394 395 /* dump session id helpful for use with network trace */ 396 seq_printf(m, " SessionId: 0x%llx", ses->Suid); 397 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) 398 seq_puts(m, " encrypted"); 399 if (ses->sign) 400 seq_puts(m, " signed"); 401 402 seq_printf(m, "\n\tUser: %d Cred User: %d", 403 from_kuid(&init_user_ns, ses->linux_uid), 404 from_kuid(&init_user_ns, ses->cred_uid)); 405 406 if (ses->chan_count > 1) { 407 seq_printf(m, "\n\n\tExtra Channels: %zu\n", 408 ses->chan_count-1); 409 for (j = 1; j < ses->chan_count; j++) 410 cifs_dump_channel(m, j, &ses->chans[j]); 411 } 412 413 seq_puts(m, "\n\n\tShares:"); 414 j = 0; 415 416 seq_printf(m, "\n\t%d) IPC: ", j); 417 if (ses->tcon_ipc) 418 cifs_debug_tcon(m, ses->tcon_ipc); 419 else 420 seq_puts(m, "none\n"); 421 422 list_for_each(tmp3, &ses->tcon_list) { 423 tcon = list_entry(tmp3, struct cifs_tcon, 424 tcon_list); 425 ++j; 426 seq_printf(m, "\n\t%d) ", j); 427 cifs_debug_tcon(m, tcon); 428 } 429 430 seq_puts(m, "\n\tMIDs:\n"); 431 432 spin_lock(&GlobalMid_Lock); 433 list_for_each(tmp3, &server->pending_mid_q) { 434 mid_entry = list_entry(tmp3, struct mid_q_entry, 435 qhead); 436 seq_printf(m, "\tState: %d com: %d pid:" 437 " %d cbdata: %p mid %llu\n", 438 mid_entry->mid_state, 439 le16_to_cpu(mid_entry->command), 440 mid_entry->pid, 441 mid_entry->callback_data, 442 mid_entry->mid); 443 } 444 spin_unlock(&GlobalMid_Lock); 445 446 spin_lock(&ses->iface_lock); 447 if (ses->iface_count) 448 seq_printf(m, "\n\tServer interfaces: %zu\n", 449 ses->iface_count); 450 for (j = 0; j < ses->iface_count; j++) { 451 struct cifs_server_iface *iface; 452 453 iface = &ses->iface_list[j]; 454 seq_printf(m, "\t%d)", j); 455 cifs_dump_iface(m, iface); 456 if (is_ses_using_iface(ses, iface)) 457 seq_puts(m, "\t\t[CONNECTED]\n"); 458 } 459 spin_unlock(&ses->iface_lock); 460 } 461 } 462 spin_unlock(&cifs_tcp_ses_lock); 463 seq_putc(m, '\n'); 464 465 /* BB add code to dump additional info such as TCP session info now */ 466 return 0; 467} 468 469static ssize_t cifs_stats_proc_write(struct file *file, 470 const char __user *buffer, size_t count, loff_t *ppos) 471{ 472 bool bv; 473 int rc; 474 struct list_head *tmp1, *tmp2, *tmp3; 475 struct TCP_Server_Info *server; 476 struct cifs_ses *ses; 477 struct cifs_tcon *tcon; 478 479 rc = kstrtobool_from_user(buffer, count, &bv); 480 if (rc == 0) { 481#ifdef CONFIG_CIFS_STATS2 482 int i; 483 484 atomic_set(&totBufAllocCount, 0); 485 atomic_set(&totSmBufAllocCount, 0); 486#endif /* CONFIG_CIFS_STATS2 */ 487 atomic_set(&tcpSesReconnectCount, 0); 488 atomic_set(&tconInfoReconnectCount, 0); 489 490 spin_lock(&GlobalMid_Lock); 491 GlobalMaxActiveXid = 0; 492 GlobalCurrentXid = 0; 493 spin_unlock(&GlobalMid_Lock); 494 spin_lock(&cifs_tcp_ses_lock); 495 list_for_each(tmp1, &cifs_tcp_ses_list) { 496 server = list_entry(tmp1, struct TCP_Server_Info, 497 tcp_ses_list); 498 server->max_in_flight = 0; 499#ifdef CONFIG_CIFS_STATS2 500 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { 501 atomic_set(&server->num_cmds[i], 0); 502 atomic_set(&server->smb2slowcmd[i], 0); 503 server->time_per_cmd[i] = 0; 504 server->slowest_cmd[i] = 0; 505 server->fastest_cmd[0] = 0; 506 } 507#endif /* CONFIG_CIFS_STATS2 */ 508 list_for_each(tmp2, &server->smb_ses_list) { 509 ses = list_entry(tmp2, struct cifs_ses, 510 smb_ses_list); 511 list_for_each(tmp3, &ses->tcon_list) { 512 tcon = list_entry(tmp3, 513 struct cifs_tcon, 514 tcon_list); 515 atomic_set(&tcon->num_smbs_sent, 0); 516 spin_lock(&tcon->stat_lock); 517 tcon->bytes_read = 0; 518 tcon->bytes_written = 0; 519 spin_unlock(&tcon->stat_lock); 520 if (server->ops->clear_stats) 521 server->ops->clear_stats(tcon); 522 } 523 } 524 } 525 spin_unlock(&cifs_tcp_ses_lock); 526 } else { 527 return rc; 528 } 529 530 return count; 531} 532 533static int cifs_stats_proc_show(struct seq_file *m, void *v) 534{ 535 int i; 536#ifdef CONFIG_CIFS_STATS2 537 int j; 538#endif /* STATS2 */ 539 struct list_head *tmp1, *tmp2, *tmp3; 540 struct TCP_Server_Info *server; 541 struct cifs_ses *ses; 542 struct cifs_tcon *tcon; 543 544 seq_printf(m, "Resources in use\nCIFS Session: %d\n", 545 sesInfoAllocCount.counter); 546 seq_printf(m, "Share (unique mount targets): %d\n", 547 tconInfoAllocCount.counter); 548 seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", 549 bufAllocCount.counter, 550 cifs_min_rcv + tcpSesAllocCount.counter); 551 seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", 552 smBufAllocCount.counter, cifs_min_small); 553#ifdef CONFIG_CIFS_STATS2 554 seq_printf(m, "Total Large %d Small %d Allocations\n", 555 atomic_read(&totBufAllocCount), 556 atomic_read(&totSmBufAllocCount)); 557#endif /* CONFIG_CIFS_STATS2 */ 558 559 seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount)); 560 seq_printf(m, 561 "\n%d session %d share reconnects\n", 562 tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); 563 564 seq_printf(m, 565 "Total vfs operations: %d maximum at one time: %d\n", 566 GlobalCurrentXid, GlobalMaxActiveXid); 567 568 i = 0; 569 spin_lock(&cifs_tcp_ses_lock); 570 list_for_each(tmp1, &cifs_tcp_ses_list) { 571 server = list_entry(tmp1, struct TCP_Server_Info, 572 tcp_ses_list); 573 seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); 574#ifdef CONFIG_CIFS_STATS2 575 seq_puts(m, "\nTotal time spent processing by command. Time "); 576 seq_printf(m, "units are jiffies (%d per second)\n", HZ); 577 seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n"); 578 seq_puts(m, " --------\t------\t----------\t-------\t-------\n"); 579 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 580 seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j, 581 atomic_read(&server->num_cmds[j]), 582 server->time_per_cmd[j], 583 server->fastest_cmd[j], 584 server->slowest_cmd[j]); 585 for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) 586 if (atomic_read(&server->smb2slowcmd[j])) 587 seq_printf(m, " %d slow responses from %s for command %d\n", 588 atomic_read(&server->smb2slowcmd[j]), 589 server->hostname, j); 590#endif /* STATS2 */ 591 list_for_each(tmp2, &server->smb_ses_list) { 592 ses = list_entry(tmp2, struct cifs_ses, 593 smb_ses_list); 594 list_for_each(tmp3, &ses->tcon_list) { 595 tcon = list_entry(tmp3, 596 struct cifs_tcon, 597 tcon_list); 598 i++; 599 seq_printf(m, "\n%d) %s", i, tcon->treeName); 600 if (tcon->need_reconnect) 601 seq_puts(m, "\tDISCONNECTED "); 602 seq_printf(m, "\nSMBs: %d", 603 atomic_read(&tcon->num_smbs_sent)); 604 if (server->ops->print_stats) 605 server->ops->print_stats(m, tcon); 606 } 607 } 608 } 609 spin_unlock(&cifs_tcp_ses_lock); 610 611 seq_putc(m, '\n'); 612 return 0; 613} 614 615static int cifs_stats_proc_open(struct inode *inode, struct file *file) 616{ 617 return single_open(file, cifs_stats_proc_show, NULL); 618} 619 620static const struct proc_ops cifs_stats_proc_ops = { 621 .proc_open = cifs_stats_proc_open, 622 .proc_read = seq_read, 623 .proc_lseek = seq_lseek, 624 .proc_release = single_release, 625 .proc_write = cifs_stats_proc_write, 626}; 627 628#ifdef CONFIG_CIFS_SMB_DIRECT 629#define PROC_FILE_DEFINE(name) \ 630static ssize_t name##_write(struct file *file, const char __user *buffer, \ 631 size_t count, loff_t *ppos) \ 632{ \ 633 int rc; \ 634 rc = kstrtoint_from_user(buffer, count, 10, & name); \ 635 if (rc) \ 636 return rc; \ 637 return count; \ 638} \ 639static int name##_proc_show(struct seq_file *m, void *v) \ 640{ \ 641 seq_printf(m, "%d\n", name ); \ 642 return 0; \ 643} \ 644static int name##_open(struct inode *inode, struct file *file) \ 645{ \ 646 return single_open(file, name##_proc_show, NULL); \ 647} \ 648\ 649static const struct proc_ops cifs_##name##_proc_fops = { \ 650 .proc_open = name##_open, \ 651 .proc_read = seq_read, \ 652 .proc_lseek = seq_lseek, \ 653 .proc_release = single_release, \ 654 .proc_write = name##_write, \ 655} 656 657PROC_FILE_DEFINE(rdma_readwrite_threshold); 658PROC_FILE_DEFINE(smbd_max_frmr_depth); 659PROC_FILE_DEFINE(smbd_keep_alive_interval); 660PROC_FILE_DEFINE(smbd_max_receive_size); 661PROC_FILE_DEFINE(smbd_max_fragmented_recv_size); 662PROC_FILE_DEFINE(smbd_max_send_size); 663PROC_FILE_DEFINE(smbd_send_credit_target); 664PROC_FILE_DEFINE(smbd_receive_credit_max); 665#endif 666 667static struct proc_dir_entry *proc_fs_cifs; 668static const struct proc_ops cifsFYI_proc_ops; 669static const struct proc_ops cifs_lookup_cache_proc_ops; 670static const struct proc_ops traceSMB_proc_ops; 671static const struct proc_ops cifs_security_flags_proc_ops; 672static const struct proc_ops cifs_linux_ext_proc_ops; 673 674void 675cifs_proc_init(void) 676{ 677 proc_fs_cifs = proc_mkdir("fs/cifs", NULL); 678 if (proc_fs_cifs == NULL) 679 return; 680 681 proc_create_single("DebugData", 0, proc_fs_cifs, 682 cifs_debug_data_proc_show); 683 684 proc_create_single("open_files", 0400, proc_fs_cifs, 685 cifs_debug_files_proc_show); 686 687 proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); 688 proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); 689 proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); 690 proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, 691 &cifs_linux_ext_proc_ops); 692 proc_create("SecurityFlags", 0644, proc_fs_cifs, 693 &cifs_security_flags_proc_ops); 694 proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, 695 &cifs_lookup_cache_proc_ops); 696 697#ifdef CONFIG_CIFS_DFS_UPCALL 698 proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); 699#endif 700 701#ifdef CONFIG_CIFS_SMB_DIRECT 702 proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs, 703 &cifs_rdma_readwrite_threshold_proc_fops); 704 proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs, 705 &cifs_smbd_max_frmr_depth_proc_fops); 706 proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs, 707 &cifs_smbd_keep_alive_interval_proc_fops); 708 proc_create("smbd_max_receive_size", 0644, proc_fs_cifs, 709 &cifs_smbd_max_receive_size_proc_fops); 710 proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs, 711 &cifs_smbd_max_fragmented_recv_size_proc_fops); 712 proc_create("smbd_max_send_size", 0644, proc_fs_cifs, 713 &cifs_smbd_max_send_size_proc_fops); 714 proc_create("smbd_send_credit_target", 0644, proc_fs_cifs, 715 &cifs_smbd_send_credit_target_proc_fops); 716 proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs, 717 &cifs_smbd_receive_credit_max_proc_fops); 718#endif 719} 720 721void 722cifs_proc_clean(void) 723{ 724 if (proc_fs_cifs == NULL) 725 return; 726 727 remove_proc_entry("DebugData", proc_fs_cifs); 728 remove_proc_entry("open_files", proc_fs_cifs); 729 remove_proc_entry("cifsFYI", proc_fs_cifs); 730 remove_proc_entry("traceSMB", proc_fs_cifs); 731 remove_proc_entry("Stats", proc_fs_cifs); 732 remove_proc_entry("SecurityFlags", proc_fs_cifs); 733 remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); 734 remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); 735 736#ifdef CONFIG_CIFS_DFS_UPCALL 737 remove_proc_entry("dfscache", proc_fs_cifs); 738#endif 739#ifdef CONFIG_CIFS_SMB_DIRECT 740 remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs); 741 remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs); 742 remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs); 743 remove_proc_entry("smbd_max_receive_size", proc_fs_cifs); 744 remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs); 745 remove_proc_entry("smbd_max_send_size", proc_fs_cifs); 746 remove_proc_entry("smbd_send_credit_target", proc_fs_cifs); 747 remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs); 748#endif 749 remove_proc_entry("fs/cifs", NULL); 750} 751 752static int cifsFYI_proc_show(struct seq_file *m, void *v) 753{ 754 seq_printf(m, "%d\n", cifsFYI); 755 return 0; 756} 757 758static int cifsFYI_proc_open(struct inode *inode, struct file *file) 759{ 760 return single_open(file, cifsFYI_proc_show, NULL); 761} 762 763static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, 764 size_t count, loff_t *ppos) 765{ 766 char c[2] = { '\0' }; 767 bool bv; 768 int rc; 769 770 rc = get_user(c[0], buffer); 771 if (rc) 772 return rc; 773 if (strtobool(c, &bv) == 0) 774 cifsFYI = bv; 775 else if ((c[0] > '1') && (c[0] <= '9')) 776 cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ 777 else 778 return -EINVAL; 779 780 return count; 781} 782 783static const struct proc_ops cifsFYI_proc_ops = { 784 .proc_open = cifsFYI_proc_open, 785 .proc_read = seq_read, 786 .proc_lseek = seq_lseek, 787 .proc_release = single_release, 788 .proc_write = cifsFYI_proc_write, 789}; 790 791static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) 792{ 793 seq_printf(m, "%d\n", linuxExtEnabled); 794 return 0; 795} 796 797static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) 798{ 799 return single_open(file, cifs_linux_ext_proc_show, NULL); 800} 801 802static ssize_t cifs_linux_ext_proc_write(struct file *file, 803 const char __user *buffer, size_t count, loff_t *ppos) 804{ 805 int rc; 806 807 rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); 808 if (rc) 809 return rc; 810 811 return count; 812} 813 814static const struct proc_ops cifs_linux_ext_proc_ops = { 815 .proc_open = cifs_linux_ext_proc_open, 816 .proc_read = seq_read, 817 .proc_lseek = seq_lseek, 818 .proc_release = single_release, 819 .proc_write = cifs_linux_ext_proc_write, 820}; 821 822static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) 823{ 824 seq_printf(m, "%d\n", lookupCacheEnabled); 825 return 0; 826} 827 828static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) 829{ 830 return single_open(file, cifs_lookup_cache_proc_show, NULL); 831} 832 833static ssize_t cifs_lookup_cache_proc_write(struct file *file, 834 const char __user *buffer, size_t count, loff_t *ppos) 835{ 836 int rc; 837 838 rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); 839 if (rc) 840 return rc; 841 842 return count; 843} 844 845static const struct proc_ops cifs_lookup_cache_proc_ops = { 846 .proc_open = cifs_lookup_cache_proc_open, 847 .proc_read = seq_read, 848 .proc_lseek = seq_lseek, 849 .proc_release = single_release, 850 .proc_write = cifs_lookup_cache_proc_write, 851}; 852 853static int traceSMB_proc_show(struct seq_file *m, void *v) 854{ 855 seq_printf(m, "%d\n", traceSMB); 856 return 0; 857} 858 859static int traceSMB_proc_open(struct inode *inode, struct file *file) 860{ 861 return single_open(file, traceSMB_proc_show, NULL); 862} 863 864static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, 865 size_t count, loff_t *ppos) 866{ 867 int rc; 868 869 rc = kstrtobool_from_user(buffer, count, &traceSMB); 870 if (rc) 871 return rc; 872 873 return count; 874} 875 876static const struct proc_ops traceSMB_proc_ops = { 877 .proc_open = traceSMB_proc_open, 878 .proc_read = seq_read, 879 .proc_lseek = seq_lseek, 880 .proc_release = single_release, 881 .proc_write = traceSMB_proc_write, 882}; 883 884static int cifs_security_flags_proc_show(struct seq_file *m, void *v) 885{ 886 seq_printf(m, "0x%x\n", global_secflags); 887 return 0; 888} 889 890static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) 891{ 892 return single_open(file, cifs_security_flags_proc_show, NULL); 893} 894 895/* 896 * Ensure that if someone sets a MUST flag, that we disable all other MAY 897 * flags except for the ones corresponding to the given MUST flag. If there are 898 * multiple MUST flags, then try to prefer more secure ones. 899 */ 900static void 901cifs_security_flags_handle_must_flags(unsigned int *flags) 902{ 903 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN; 904 905 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) 906 *flags = CIFSSEC_MUST_KRB5; 907 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) 908 *flags = CIFSSEC_MUST_NTLMSSP; 909 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) 910 *flags = CIFSSEC_MUST_NTLMV2; 911 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM) 912 *flags = CIFSSEC_MUST_NTLM; 913 else if (CIFSSEC_MUST_LANMAN && 914 (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN) 915 *flags = CIFSSEC_MUST_LANMAN; 916 else if (CIFSSEC_MUST_PLNTXT && 917 (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT) 918 *flags = CIFSSEC_MUST_PLNTXT; 919 920 *flags |= signflags; 921} 922 923static ssize_t cifs_security_flags_proc_write(struct file *file, 924 const char __user *buffer, size_t count, loff_t *ppos) 925{ 926 int rc; 927 unsigned int flags; 928 char flags_string[12]; 929 bool bv; 930 931 if ((count < 1) || (count > 11)) 932 return -EINVAL; 933 934 memset(flags_string, 0, 12); 935 936 if (copy_from_user(flags_string, buffer, count)) 937 return -EFAULT; 938 939 if (count < 3) { 940 /* single char or single char followed by null */ 941 if (strtobool(flags_string, &bv) == 0) { 942 global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; 943 return count; 944 } else if (!isdigit(flags_string[0])) { 945 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 946 flags_string); 947 return -EINVAL; 948 } 949 } 950 951 /* else we have a number */ 952 rc = kstrtouint(flags_string, 0, &flags); 953 if (rc) { 954 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", 955 flags_string); 956 return rc; 957 } 958 959 cifs_dbg(FYI, "sec flags 0x%x\n", flags); 960 961 if (flags == 0) { 962 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); 963 return -EINVAL; 964 } 965 966 if (flags & ~CIFSSEC_MASK) { 967 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", 968 flags & ~CIFSSEC_MASK); 969 return -EINVAL; 970 } 971 972 cifs_security_flags_handle_must_flags(&flags); 973 974 /* flags look ok - update the global security flags for cifs module */ 975 global_secflags = flags; 976 if (global_secflags & CIFSSEC_MUST_SIGN) { 977 /* requiring signing implies signing is allowed */ 978 global_secflags |= CIFSSEC_MAY_SIGN; 979 cifs_dbg(FYI, "packet signing now required\n"); 980 } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { 981 cifs_dbg(FYI, "packet signing disabled\n"); 982 } 983 /* BB should we turn on MAY flags for other MUST options? */ 984 return count; 985} 986 987static const struct proc_ops cifs_security_flags_proc_ops = { 988 .proc_open = cifs_security_flags_proc_open, 989 .proc_read = seq_read, 990 .proc_lseek = seq_lseek, 991 .proc_release = single_release, 992 .proc_write = cifs_security_flags_proc_write, 993}; 994#else 995inline void cifs_proc_init(void) 996{ 997} 998 999inline void cifs_proc_clean(void) 1000{ 1001} 1002#endif /* PROC_FS */ 1003