1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6#include "xfs.h" 7#include "xfs_fs.h" 8#include "xfs_shared.h" 9#include "xfs_format.h" 10#include "xfs_log_format.h" 11#include "xfs_trans_resv.h" 12#include "xfs_mount.h" 13#include "xfs_inode.h" 14#include "xfs_rtalloc.h" 15#include "xfs_iwalk.h" 16#include "xfs_itable.h" 17#include "xfs_error.h" 18#include "xfs_attr.h" 19#include "xfs_bmap.h" 20#include "xfs_bmap_util.h" 21#include "xfs_fsops.h" 22#include "xfs_discard.h" 23#include "xfs_quota.h" 24#include "xfs_export.h" 25#include "xfs_trace.h" 26#include "xfs_icache.h" 27#include "xfs_trans.h" 28#include "xfs_acl.h" 29#include "xfs_btree.h" 30#include <linux/fsmap.h> 31#include "xfs_fsmap.h" 32#include "scrub/xfs_scrub.h" 33#include "xfs_sb.h" 34#include "xfs_ag.h" 35#include "xfs_health.h" 36#include "xfs_reflink.h" 37#include "xfs_ioctl.h" 38#include "xfs_da_format.h" 39#include "xfs_da_btree.h" 40 41#include <linux/mount.h> 42#include <linux/namei.h> 43 44/* 45 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 46 * a file or fs handle. 47 * 48 * XFS_IOC_PATH_TO_FSHANDLE 49 * returns fs handle for a mount point or path within that mount point 50 * XFS_IOC_FD_TO_HANDLE 51 * returns full handle for a FD opened in user space 52 * XFS_IOC_PATH_TO_HANDLE 53 * returns full handle for a path 54 */ 55int 56xfs_find_handle( 57 unsigned int cmd, 58 xfs_fsop_handlereq_t *hreq) 59{ 60 int hsize; 61 xfs_handle_t handle; 62 struct inode *inode; 63 struct fd f = {NULL}; 64 struct path path; 65 int error; 66 struct xfs_inode *ip; 67 68 if (cmd == XFS_IOC_FD_TO_HANDLE) { 69 f = fdget(hreq->fd); 70 if (!f.file) 71 return -EBADF; 72 inode = file_inode(f.file); 73 } else { 74 error = user_path_at(AT_FDCWD, hreq->path, 0, &path); 75 if (error) 76 return error; 77 inode = d_inode(path.dentry); 78 } 79 ip = XFS_I(inode); 80 81 /* 82 * We can only generate handles for inodes residing on a XFS filesystem, 83 * and only for regular files, directories or symbolic links. 84 */ 85 error = -EINVAL; 86 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 87 goto out_put; 88 89 error = -EBADF; 90 if (!S_ISREG(inode->i_mode) && 91 !S_ISDIR(inode->i_mode) && 92 !S_ISLNK(inode->i_mode)) 93 goto out_put; 94 95 96 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 97 98 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 99 /* 100 * This handle only contains an fsid, zero the rest. 101 */ 102 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 103 hsize = sizeof(xfs_fsid_t); 104 } else { 105 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 106 sizeof(handle.ha_fid.fid_len); 107 handle.ha_fid.fid_pad = 0; 108 handle.ha_fid.fid_gen = inode->i_generation; 109 handle.ha_fid.fid_ino = ip->i_ino; 110 hsize = sizeof(xfs_handle_t); 111 } 112 113 error = -EFAULT; 114 if (copy_to_user(hreq->ohandle, &handle, hsize) || 115 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 116 goto out_put; 117 118 error = 0; 119 120 out_put: 121 if (cmd == XFS_IOC_FD_TO_HANDLE) 122 fdput(f); 123 else 124 path_put(&path); 125 return error; 126} 127 128/* 129 * No need to do permission checks on the various pathname components 130 * as the handle operations are privileged. 131 */ 132STATIC int 133xfs_handle_acceptable( 134 void *context, 135 struct dentry *dentry) 136{ 137 return 1; 138} 139 140/* 141 * Convert userspace handle data into a dentry. 142 */ 143struct dentry * 144xfs_handle_to_dentry( 145 struct file *parfilp, 146 void __user *uhandle, 147 u32 hlen) 148{ 149 xfs_handle_t handle; 150 struct xfs_fid64 fid; 151 152 /* 153 * Only allow handle opens under a directory. 154 */ 155 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 156 return ERR_PTR(-ENOTDIR); 157 158 if (hlen != sizeof(xfs_handle_t)) 159 return ERR_PTR(-EINVAL); 160 if (copy_from_user(&handle, uhandle, hlen)) 161 return ERR_PTR(-EFAULT); 162 if (handle.ha_fid.fid_len != 163 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 164 return ERR_PTR(-EINVAL); 165 166 memset(&fid, 0, sizeof(struct fid)); 167 fid.ino = handle.ha_fid.fid_ino; 168 fid.gen = handle.ha_fid.fid_gen; 169 170 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 171 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 172 xfs_handle_acceptable, NULL); 173} 174 175STATIC struct dentry * 176xfs_handlereq_to_dentry( 177 struct file *parfilp, 178 xfs_fsop_handlereq_t *hreq) 179{ 180 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 181} 182 183int 184xfs_open_by_handle( 185 struct file *parfilp, 186 xfs_fsop_handlereq_t *hreq) 187{ 188 const struct cred *cred = current_cred(); 189 int error; 190 int fd; 191 int permflag; 192 struct file *filp; 193 struct inode *inode; 194 struct dentry *dentry; 195 fmode_t fmode; 196 struct path path; 197 198 if (!capable(CAP_SYS_ADMIN)) 199 return -EPERM; 200 201 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 202 if (IS_ERR(dentry)) 203 return PTR_ERR(dentry); 204 inode = d_inode(dentry); 205 206 /* Restrict xfs_open_by_handle to directories & regular files. */ 207 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 208 error = -EPERM; 209 goto out_dput; 210 } 211 212#if BITS_PER_LONG != 32 213 hreq->oflags |= O_LARGEFILE; 214#endif 215 216 permflag = hreq->oflags; 217 fmode = OPEN_FMODE(permflag); 218 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 219 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 220 error = -EPERM; 221 goto out_dput; 222 } 223 224 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 225 error = -EPERM; 226 goto out_dput; 227 } 228 229 /* Can't write directories. */ 230 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 231 error = -EISDIR; 232 goto out_dput; 233 } 234 235 fd = get_unused_fd_flags(0); 236 if (fd < 0) { 237 error = fd; 238 goto out_dput; 239 } 240 241 path.mnt = parfilp->f_path.mnt; 242 path.dentry = dentry; 243 filp = dentry_open(&path, hreq->oflags, cred); 244 dput(dentry); 245 if (IS_ERR(filp)) { 246 put_unused_fd(fd); 247 return PTR_ERR(filp); 248 } 249 250 if (S_ISREG(inode->i_mode)) { 251 filp->f_flags |= O_NOATIME; 252 filp->f_mode |= FMODE_NOCMTIME; 253 } 254 255 fd_install(fd, filp); 256 return fd; 257 258 out_dput: 259 dput(dentry); 260 return error; 261} 262 263int 264xfs_readlink_by_handle( 265 struct file *parfilp, 266 xfs_fsop_handlereq_t *hreq) 267{ 268 struct dentry *dentry; 269 __u32 olen; 270 int error; 271 272 if (!capable(CAP_SYS_ADMIN)) 273 return -EPERM; 274 275 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 276 if (IS_ERR(dentry)) 277 return PTR_ERR(dentry); 278 279 /* Restrict this handle operation to symlinks only. */ 280 if (!d_is_symlink(dentry)) { 281 error = -EINVAL; 282 goto out_dput; 283 } 284 285 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 286 error = -EFAULT; 287 goto out_dput; 288 } 289 290 error = vfs_readlink(dentry, hreq->ohandle, olen); 291 292 out_dput: 293 dput(dentry); 294 return error; 295} 296 297/* 298 * Format an attribute and copy it out to the user's buffer. 299 * Take care to check values and protect against them changing later, 300 * we may be reading them directly out of a user buffer. 301 */ 302static void 303xfs_ioc_attr_put_listent( 304 struct xfs_attr_list_context *context, 305 int flags, 306 unsigned char *name, 307 int namelen, 308 int valuelen) 309{ 310 struct xfs_attrlist *alist = context->buffer; 311 struct xfs_attrlist_ent *aep; 312 int arraytop; 313 314 ASSERT(!context->seen_enough); 315 ASSERT(context->count >= 0); 316 ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); 317 ASSERT(context->firstu >= sizeof(*alist)); 318 ASSERT(context->firstu <= context->bufsize); 319 320 /* 321 * Only list entries in the right namespace. 322 */ 323 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK)) 324 return; 325 326 arraytop = sizeof(*alist) + 327 context->count * sizeof(alist->al_offset[0]); 328 329 /* decrement by the actual bytes used by the attr */ 330 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) + 331 namelen + 1, sizeof(uint32_t)); 332 if (context->firstu < arraytop) { 333 trace_xfs_attr_list_full(context); 334 alist->al_more = 1; 335 context->seen_enough = 1; 336 return; 337 } 338 339 aep = context->buffer + context->firstu; 340 aep->a_valuelen = valuelen; 341 memcpy(aep->a_name, name, namelen); 342 aep->a_name[namelen] = 0; 343 alist->al_offset[context->count++] = context->firstu; 344 alist->al_count = context->count; 345 trace_xfs_attr_list_add(context); 346} 347 348static unsigned int 349xfs_attr_filter( 350 u32 ioc_flags) 351{ 352 if (ioc_flags & XFS_IOC_ATTR_ROOT) 353 return XFS_ATTR_ROOT; 354 if (ioc_flags & XFS_IOC_ATTR_SECURE) 355 return XFS_ATTR_SECURE; 356 return 0; 357} 358 359static unsigned int 360xfs_attr_flags( 361 u32 ioc_flags) 362{ 363 if (ioc_flags & XFS_IOC_ATTR_CREATE) 364 return XATTR_CREATE; 365 if (ioc_flags & XFS_IOC_ATTR_REPLACE) 366 return XATTR_REPLACE; 367 return 0; 368} 369 370int 371xfs_ioc_attr_list( 372 struct xfs_inode *dp, 373 void __user *ubuf, 374 size_t bufsize, 375 int flags, 376 struct xfs_attrlist_cursor __user *ucursor) 377{ 378 struct xfs_attr_list_context context = { }; 379 struct xfs_attrlist *alist; 380 void *buffer; 381 int error; 382 383 if (bufsize < sizeof(struct xfs_attrlist) || 384 bufsize > XFS_XATTR_LIST_MAX) 385 return -EINVAL; 386 387 /* 388 * Reject flags, only allow namespaces. 389 */ 390 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 391 return -EINVAL; 392 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 393 return -EINVAL; 394 395 /* 396 * Validate the cursor. 397 */ 398 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor))) 399 return -EFAULT; 400 if (context.cursor.pad1 || context.cursor.pad2) 401 return -EINVAL; 402 if (!context.cursor.initted && 403 (context.cursor.hashval || context.cursor.blkno || 404 context.cursor.offset)) 405 return -EINVAL; 406 407 buffer = kvzalloc(bufsize, GFP_KERNEL); 408 if (!buffer) 409 return -ENOMEM; 410 411 /* 412 * Initialize the output buffer. 413 */ 414 context.dp = dp; 415 context.resynch = 1; 416 context.attr_filter = xfs_attr_filter(flags); 417 context.buffer = buffer; 418 context.bufsize = round_down(bufsize, sizeof(uint32_t)); 419 context.firstu = context.bufsize; 420 context.put_listent = xfs_ioc_attr_put_listent; 421 422 alist = context.buffer; 423 alist->al_count = 0; 424 alist->al_more = 0; 425 alist->al_offset[0] = context.bufsize; 426 427 error = xfs_attr_list(&context); 428 if (error) 429 goto out_free; 430 431 if (copy_to_user(ubuf, buffer, bufsize) || 432 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor))) 433 error = -EFAULT; 434out_free: 435 kmem_free(buffer); 436 return error; 437} 438 439STATIC int 440xfs_attrlist_by_handle( 441 struct file *parfilp, 442 struct xfs_fsop_attrlist_handlereq __user *p) 443{ 444 struct xfs_fsop_attrlist_handlereq al_hreq; 445 struct dentry *dentry; 446 int error = -ENOMEM; 447 448 if (!capable(CAP_SYS_ADMIN)) 449 return -EPERM; 450 if (copy_from_user(&al_hreq, p, sizeof(al_hreq))) 451 return -EFAULT; 452 453 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 454 if (IS_ERR(dentry)) 455 return PTR_ERR(dentry); 456 457 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer, 458 al_hreq.buflen, al_hreq.flags, &p->pos); 459 dput(dentry); 460 return error; 461} 462 463static int 464xfs_attrmulti_attr_get( 465 struct inode *inode, 466 unsigned char *name, 467 unsigned char __user *ubuf, 468 uint32_t *len, 469 uint32_t flags) 470{ 471 struct xfs_da_args args = { 472 .dp = XFS_I(inode), 473 .attr_filter = xfs_attr_filter(flags), 474 .attr_flags = xfs_attr_flags(flags), 475 .name = name, 476 .namelen = strlen(name), 477 .valuelen = *len, 478 }; 479 int error; 480 481 if (*len > XFS_XATTR_SIZE_MAX) 482 return -EINVAL; 483 484 error = xfs_attr_get(&args); 485 if (error) 486 goto out_kfree; 487 488 *len = args.valuelen; 489 if (copy_to_user(ubuf, args.value, args.valuelen)) 490 error = -EFAULT; 491 492out_kfree: 493 kmem_free(args.value); 494 return error; 495} 496 497static int 498xfs_attrmulti_attr_set( 499 struct inode *inode, 500 unsigned char *name, 501 const unsigned char __user *ubuf, 502 uint32_t len, 503 uint32_t flags) 504{ 505 struct xfs_da_args args = { 506 .dp = XFS_I(inode), 507 .attr_filter = xfs_attr_filter(flags), 508 .attr_flags = xfs_attr_flags(flags), 509 .name = name, 510 .namelen = strlen(name), 511 }; 512 int error; 513 514 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 515 return -EPERM; 516 517 if (ubuf) { 518 if (len > XFS_XATTR_SIZE_MAX) 519 return -EINVAL; 520 args.value = memdup_user(ubuf, len); 521 if (IS_ERR(args.value)) 522 return PTR_ERR(args.value); 523 args.valuelen = len; 524 } 525 526 error = xfs_attr_set(&args); 527 if (!error && (flags & XFS_IOC_ATTR_ROOT)) 528 xfs_forget_acl(inode, name); 529 kfree(args.value); 530 return error; 531} 532 533int 534xfs_ioc_attrmulti_one( 535 struct file *parfilp, 536 struct inode *inode, 537 uint32_t opcode, 538 void __user *uname, 539 void __user *value, 540 uint32_t *len, 541 uint32_t flags) 542{ 543 unsigned char *name; 544 int error; 545 546 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE)) 547 return -EINVAL; 548 549 name = strndup_user(uname, MAXNAMELEN); 550 if (IS_ERR(name)) 551 return PTR_ERR(name); 552 553 switch (opcode) { 554 case ATTR_OP_GET: 555 error = xfs_attrmulti_attr_get(inode, name, value, len, flags); 556 break; 557 case ATTR_OP_REMOVE: 558 value = NULL; 559 *len = 0; 560 /* fall through */ 561 case ATTR_OP_SET: 562 error = mnt_want_write_file(parfilp); 563 if (error) 564 break; 565 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags); 566 mnt_drop_write_file(parfilp); 567 break; 568 default: 569 error = -EINVAL; 570 break; 571 } 572 573 kfree(name); 574 return error; 575} 576 577STATIC int 578xfs_attrmulti_by_handle( 579 struct file *parfilp, 580 void __user *arg) 581{ 582 int error; 583 xfs_attr_multiop_t *ops; 584 xfs_fsop_attrmulti_handlereq_t am_hreq; 585 struct dentry *dentry; 586 unsigned int i, size; 587 588 if (!capable(CAP_SYS_ADMIN)) 589 return -EPERM; 590 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 591 return -EFAULT; 592 593 /* overflow check */ 594 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 595 return -E2BIG; 596 597 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 598 if (IS_ERR(dentry)) 599 return PTR_ERR(dentry); 600 601 error = -E2BIG; 602 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 603 if (!size || size > 16 * PAGE_SIZE) 604 goto out_dput; 605 606 ops = memdup_user(am_hreq.ops, size); 607 if (IS_ERR(ops)) { 608 error = PTR_ERR(ops); 609 goto out_dput; 610 } 611 612 error = 0; 613 for (i = 0; i < am_hreq.opcount; i++) { 614 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp, 615 d_inode(dentry), ops[i].am_opcode, 616 ops[i].am_attrname, ops[i].am_attrvalue, 617 &ops[i].am_length, ops[i].am_flags); 618 } 619 620 if (copy_to_user(am_hreq.ops, ops, size)) 621 error = -EFAULT; 622 623 kfree(ops); 624 out_dput: 625 dput(dentry); 626 return error; 627} 628 629int 630xfs_ioc_space( 631 struct file *filp, 632 xfs_flock64_t *bf) 633{ 634 struct inode *inode = file_inode(filp); 635 struct xfs_inode *ip = XFS_I(inode); 636 struct iattr iattr; 637 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR; 638 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 639 int error; 640 641 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 642 return -EPERM; 643 644 if (!(filp->f_mode & FMODE_WRITE)) 645 return -EBADF; 646 647 if (!S_ISREG(inode->i_mode)) 648 return -EINVAL; 649 650 if (xfs_is_always_cow_inode(ip)) 651 return -EOPNOTSUPP; 652 653 if (filp->f_flags & O_DSYNC) 654 flags |= XFS_PREALLOC_SYNC; 655 if (filp->f_mode & FMODE_NOCMTIME) 656 flags |= XFS_PREALLOC_INVISIBLE; 657 658 error = mnt_want_write_file(filp); 659 if (error) 660 return error; 661 662 xfs_ilock(ip, iolock); 663 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 664 if (error) 665 goto out_unlock; 666 inode_dio_wait(inode); 667 668 switch (bf->l_whence) { 669 case 0: /*SEEK_SET*/ 670 break; 671 case 1: /*SEEK_CUR*/ 672 bf->l_start += filp->f_pos; 673 break; 674 case 2: /*SEEK_END*/ 675 bf->l_start += XFS_ISIZE(ip); 676 break; 677 default: 678 error = -EINVAL; 679 goto out_unlock; 680 } 681 682 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) { 683 error = -EINVAL; 684 goto out_unlock; 685 } 686 687 if (bf->l_start > XFS_ISIZE(ip)) { 688 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 689 bf->l_start - XFS_ISIZE(ip), 690 XFS_BMAPI_PREALLOC); 691 if (error) 692 goto out_unlock; 693 } 694 695 iattr.ia_valid = ATTR_SIZE; 696 iattr.ia_size = bf->l_start; 697 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 698 if (error) 699 goto out_unlock; 700 701 error = xfs_update_prealloc_flags(ip, flags); 702 703out_unlock: 704 xfs_iunlock(ip, iolock); 705 mnt_drop_write_file(filp); 706 return error; 707} 708 709/* Return 0 on success or positive error */ 710int 711xfs_fsbulkstat_one_fmt( 712 struct xfs_ibulk *breq, 713 const struct xfs_bulkstat *bstat) 714{ 715 struct xfs_bstat bs1; 716 717 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 718 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 719 return -EFAULT; 720 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 721} 722 723int 724xfs_fsinumbers_fmt( 725 struct xfs_ibulk *breq, 726 const struct xfs_inumbers *igrp) 727{ 728 struct xfs_inogrp ig1; 729 730 xfs_inumbers_to_inogrp(&ig1, igrp); 731 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 732 return -EFAULT; 733 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 734} 735 736STATIC int 737xfs_ioc_fsbulkstat( 738 xfs_mount_t *mp, 739 unsigned int cmd, 740 void __user *arg) 741{ 742 struct xfs_fsop_bulkreq bulkreq; 743 struct xfs_ibulk breq = { 744 .mp = mp, 745 .ocount = 0, 746 }; 747 xfs_ino_t lastino; 748 int error; 749 750 /* done = 1 if there are more stats to get and if bulkstat */ 751 /* should be called again (unused here, but used in dmapi) */ 752 753 if (!capable(CAP_SYS_ADMIN)) 754 return -EPERM; 755 756 if (XFS_FORCED_SHUTDOWN(mp)) 757 return -EIO; 758 759 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 760 return -EFAULT; 761 762 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 763 return -EFAULT; 764 765 if (bulkreq.icount <= 0) 766 return -EINVAL; 767 768 if (bulkreq.ubuffer == NULL) 769 return -EINVAL; 770 771 breq.ubuffer = bulkreq.ubuffer; 772 breq.icount = bulkreq.icount; 773 774 /* 775 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 776 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 777 * that *lastip contains either zero or the number of the last inode to 778 * be examined by the previous call and return results starting with 779 * the next inode after that. The new bulk request back end functions 780 * take the inode to start with, so we have to compute the startino 781 * parameter from lastino to maintain correct function. lastino == 0 782 * is a special case because it has traditionally meant "first inode 783 * in filesystem". 784 */ 785 if (cmd == XFS_IOC_FSINUMBERS) { 786 breq.startino = lastino ? lastino + 1 : 0; 787 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 788 lastino = breq.startino - 1; 789 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 790 breq.startino = lastino; 791 breq.icount = 1; 792 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 793 } else { /* XFS_IOC_FSBULKSTAT */ 794 breq.startino = lastino ? lastino + 1 : 0; 795 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 796 lastino = breq.startino - 1; 797 } 798 799 if (error) 800 return error; 801 802 if (bulkreq.lastip != NULL && 803 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 804 return -EFAULT; 805 806 if (bulkreq.ocount != NULL && 807 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 808 return -EFAULT; 809 810 return 0; 811} 812 813/* Return 0 on success or positive error */ 814static int 815xfs_bulkstat_fmt( 816 struct xfs_ibulk *breq, 817 const struct xfs_bulkstat *bstat) 818{ 819 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 820 return -EFAULT; 821 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 822} 823 824/* 825 * Check the incoming bulk request @hdr from userspace and initialize the 826 * internal @breq bulk request appropriately. Returns 0 if the bulk request 827 * should proceed; -ECANCELED if there's nothing to do; or the usual 828 * negative error code. 829 */ 830static int 831xfs_bulk_ireq_setup( 832 struct xfs_mount *mp, 833 struct xfs_bulk_ireq *hdr, 834 struct xfs_ibulk *breq, 835 void __user *ubuffer) 836{ 837 if (hdr->icount == 0 || 838 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 839 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 840 return -EINVAL; 841 842 breq->startino = hdr->ino; 843 breq->ubuffer = ubuffer; 844 breq->icount = hdr->icount; 845 breq->ocount = 0; 846 breq->flags = 0; 847 848 /* 849 * The @ino parameter is a special value, so we must look it up here. 850 * We're not allowed to have IREQ_AGNO, and we only return one inode 851 * worth of data. 852 */ 853 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 854 if (hdr->flags & XFS_BULK_IREQ_AGNO) 855 return -EINVAL; 856 857 switch (hdr->ino) { 858 case XFS_BULK_IREQ_SPECIAL_ROOT: 859 hdr->ino = mp->m_sb.sb_rootino; 860 break; 861 default: 862 return -EINVAL; 863 } 864 breq->icount = 1; 865 } 866 867 /* 868 * The IREQ_AGNO flag means that we only want results from a given AG. 869 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 870 * beyond the specified AG then we return no results. 871 */ 872 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 873 if (hdr->agno >= mp->m_sb.sb_agcount) 874 return -EINVAL; 875 876 if (breq->startino == 0) 877 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 878 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 879 return -EINVAL; 880 881 breq->flags |= XFS_IBULK_SAME_AG; 882 883 /* Asking for an inode past the end of the AG? We're done! */ 884 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 885 return -ECANCELED; 886 } else if (hdr->agno) 887 return -EINVAL; 888 889 /* Asking for an inode past the end of the FS? We're done! */ 890 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 891 return -ECANCELED; 892 893 return 0; 894} 895 896/* 897 * Update the userspace bulk request @hdr to reflect the end state of the 898 * internal bulk request @breq. 899 */ 900static void 901xfs_bulk_ireq_teardown( 902 struct xfs_bulk_ireq *hdr, 903 struct xfs_ibulk *breq) 904{ 905 hdr->ino = breq->startino; 906 hdr->ocount = breq->ocount; 907} 908 909/* Handle the v5 bulkstat ioctl. */ 910STATIC int 911xfs_ioc_bulkstat( 912 struct xfs_mount *mp, 913 unsigned int cmd, 914 struct xfs_bulkstat_req __user *arg) 915{ 916 struct xfs_bulk_ireq hdr; 917 struct xfs_ibulk breq = { 918 .mp = mp, 919 }; 920 int error; 921 922 if (!capable(CAP_SYS_ADMIN)) 923 return -EPERM; 924 925 if (XFS_FORCED_SHUTDOWN(mp)) 926 return -EIO; 927 928 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 929 return -EFAULT; 930 931 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 932 if (error == -ECANCELED) 933 goto out_teardown; 934 if (error < 0) 935 return error; 936 937 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 938 if (error) 939 return error; 940 941out_teardown: 942 xfs_bulk_ireq_teardown(&hdr, &breq); 943 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 944 return -EFAULT; 945 946 return 0; 947} 948 949STATIC int 950xfs_inumbers_fmt( 951 struct xfs_ibulk *breq, 952 const struct xfs_inumbers *igrp) 953{ 954 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 955 return -EFAULT; 956 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 957} 958 959/* Handle the v5 inumbers ioctl. */ 960STATIC int 961xfs_ioc_inumbers( 962 struct xfs_mount *mp, 963 unsigned int cmd, 964 struct xfs_inumbers_req __user *arg) 965{ 966 struct xfs_bulk_ireq hdr; 967 struct xfs_ibulk breq = { 968 .mp = mp, 969 }; 970 int error; 971 972 if (!capable(CAP_SYS_ADMIN)) 973 return -EPERM; 974 975 if (XFS_FORCED_SHUTDOWN(mp)) 976 return -EIO; 977 978 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 979 return -EFAULT; 980 981 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 982 if (error == -ECANCELED) 983 goto out_teardown; 984 if (error < 0) 985 return error; 986 987 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 988 if (error) 989 return error; 990 991out_teardown: 992 xfs_bulk_ireq_teardown(&hdr, &breq); 993 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 994 return -EFAULT; 995 996 return 0; 997} 998 999STATIC int 1000xfs_ioc_fsgeometry( 1001 struct xfs_mount *mp, 1002 void __user *arg, 1003 int struct_version) 1004{ 1005 struct xfs_fsop_geom fsgeo; 1006 size_t len; 1007 1008 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version); 1009 1010 if (struct_version <= 3) 1011 len = sizeof(struct xfs_fsop_geom_v1); 1012 else if (struct_version == 4) 1013 len = sizeof(struct xfs_fsop_geom_v4); 1014 else { 1015 xfs_fsop_geom_health(mp, &fsgeo); 1016 len = sizeof(fsgeo); 1017 } 1018 1019 if (copy_to_user(arg, &fsgeo, len)) 1020 return -EFAULT; 1021 return 0; 1022} 1023 1024STATIC int 1025xfs_ioc_ag_geometry( 1026 struct xfs_mount *mp, 1027 void __user *arg) 1028{ 1029 struct xfs_ag_geometry ageo; 1030 int error; 1031 1032 if (copy_from_user(&ageo, arg, sizeof(ageo))) 1033 return -EFAULT; 1034 if (ageo.ag_flags) 1035 return -EINVAL; 1036 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 1037 return -EINVAL; 1038 1039 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 1040 if (error) 1041 return error; 1042 1043 if (copy_to_user(arg, &ageo, sizeof(ageo))) 1044 return -EFAULT; 1045 return 0; 1046} 1047 1048/* 1049 * Linux extended inode flags interface. 1050 */ 1051 1052STATIC unsigned int 1053xfs_merge_ioc_xflags( 1054 unsigned int flags, 1055 unsigned int start) 1056{ 1057 unsigned int xflags = start; 1058 1059 if (flags & FS_IMMUTABLE_FL) 1060 xflags |= FS_XFLAG_IMMUTABLE; 1061 else 1062 xflags &= ~FS_XFLAG_IMMUTABLE; 1063 if (flags & FS_APPEND_FL) 1064 xflags |= FS_XFLAG_APPEND; 1065 else 1066 xflags &= ~FS_XFLAG_APPEND; 1067 if (flags & FS_SYNC_FL) 1068 xflags |= FS_XFLAG_SYNC; 1069 else 1070 xflags &= ~FS_XFLAG_SYNC; 1071 if (flags & FS_NOATIME_FL) 1072 xflags |= FS_XFLAG_NOATIME; 1073 else 1074 xflags &= ~FS_XFLAG_NOATIME; 1075 if (flags & FS_NODUMP_FL) 1076 xflags |= FS_XFLAG_NODUMP; 1077 else 1078 xflags &= ~FS_XFLAG_NODUMP; 1079 if (flags & FS_DAX_FL) 1080 xflags |= FS_XFLAG_DAX; 1081 else 1082 xflags &= ~FS_XFLAG_DAX; 1083 1084 return xflags; 1085} 1086 1087STATIC unsigned int 1088xfs_di2lxflags( 1089 uint16_t di_flags, 1090 uint64_t di_flags2) 1091{ 1092 unsigned int flags = 0; 1093 1094 if (di_flags & XFS_DIFLAG_IMMUTABLE) 1095 flags |= FS_IMMUTABLE_FL; 1096 if (di_flags & XFS_DIFLAG_APPEND) 1097 flags |= FS_APPEND_FL; 1098 if (di_flags & XFS_DIFLAG_SYNC) 1099 flags |= FS_SYNC_FL; 1100 if (di_flags & XFS_DIFLAG_NOATIME) 1101 flags |= FS_NOATIME_FL; 1102 if (di_flags & XFS_DIFLAG_NODUMP) 1103 flags |= FS_NODUMP_FL; 1104 if (di_flags2 & XFS_DIFLAG2_DAX) { 1105 flags |= FS_DAX_FL; 1106 } 1107 return flags; 1108} 1109 1110static void 1111xfs_fill_fsxattr( 1112 struct xfs_inode *ip, 1113 bool attr, 1114 struct fsxattr *fa) 1115{ 1116 struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df; 1117 1118 simple_fill_fsxattr(fa, xfs_ip2xflags(ip)); 1119 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 1120 fa->fsx_cowextsize = ip->i_d.di_cowextsize << 1121 ip->i_mount->m_sb.sb_blocklog; 1122 fa->fsx_projid = ip->i_d.di_projid; 1123 if (ifp && (ifp->if_flags & XFS_IFEXTENTS)) 1124 fa->fsx_nextents = xfs_iext_count(ifp); 1125 else 1126 fa->fsx_nextents = xfs_ifork_nextents(ifp); 1127} 1128 1129STATIC int 1130xfs_ioc_fsgetxattr( 1131 xfs_inode_t *ip, 1132 int attr, 1133 void __user *arg) 1134{ 1135 struct fsxattr fa; 1136 1137 xfs_ilock(ip, XFS_ILOCK_SHARED); 1138 xfs_fill_fsxattr(ip, attr, &fa); 1139 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1140 1141 if (copy_to_user(arg, &fa, sizeof(fa))) 1142 return -EFAULT; 1143 return 0; 1144} 1145 1146STATIC uint16_t 1147xfs_flags2diflags( 1148 struct xfs_inode *ip, 1149 unsigned int xflags) 1150{ 1151 /* can't set PREALLOC this way, just preserve it */ 1152 uint16_t di_flags = 1153 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 1154 1155 if (xflags & FS_XFLAG_IMMUTABLE) 1156 di_flags |= XFS_DIFLAG_IMMUTABLE; 1157 if (xflags & FS_XFLAG_APPEND) 1158 di_flags |= XFS_DIFLAG_APPEND; 1159 if (xflags & FS_XFLAG_SYNC) 1160 di_flags |= XFS_DIFLAG_SYNC; 1161 if (xflags & FS_XFLAG_NOATIME) 1162 di_flags |= XFS_DIFLAG_NOATIME; 1163 if (xflags & FS_XFLAG_NODUMP) 1164 di_flags |= XFS_DIFLAG_NODUMP; 1165 if (xflags & FS_XFLAG_NODEFRAG) 1166 di_flags |= XFS_DIFLAG_NODEFRAG; 1167 if (xflags & FS_XFLAG_FILESTREAM) 1168 di_flags |= XFS_DIFLAG_FILESTREAM; 1169 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1170 if (xflags & FS_XFLAG_RTINHERIT) 1171 di_flags |= XFS_DIFLAG_RTINHERIT; 1172 if (xflags & FS_XFLAG_NOSYMLINKS) 1173 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1174 if (xflags & FS_XFLAG_EXTSZINHERIT) 1175 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1176 if (xflags & FS_XFLAG_PROJINHERIT) 1177 di_flags |= XFS_DIFLAG_PROJINHERIT; 1178 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1179 if (xflags & FS_XFLAG_REALTIME) 1180 di_flags |= XFS_DIFLAG_REALTIME; 1181 if (xflags & FS_XFLAG_EXTSIZE) 1182 di_flags |= XFS_DIFLAG_EXTSIZE; 1183 } 1184 1185 return di_flags; 1186} 1187 1188STATIC uint64_t 1189xfs_flags2diflags2( 1190 struct xfs_inode *ip, 1191 unsigned int xflags) 1192{ 1193 uint64_t di_flags2 = 1194 (ip->i_d.di_flags2 & (XFS_DIFLAG2_REFLINK | 1195 XFS_DIFLAG2_BIGTIME)); 1196 1197 if (xflags & FS_XFLAG_DAX) 1198 di_flags2 |= XFS_DIFLAG2_DAX; 1199 if (xflags & FS_XFLAG_COWEXTSIZE) 1200 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1201 1202 return di_flags2; 1203} 1204 1205static int 1206xfs_ioctl_setattr_xflags( 1207 struct xfs_trans *tp, 1208 struct xfs_inode *ip, 1209 struct fsxattr *fa) 1210{ 1211 struct xfs_mount *mp = ip->i_mount; 1212 uint64_t di_flags2; 1213 1214 /* Can't change realtime flag if any extents are allocated. */ 1215 if ((ip->i_df.if_nextents || ip->i_delayed_blks) && 1216 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1217 return -EINVAL; 1218 1219 /* If realtime flag is set then must have realtime device */ 1220 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1221 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1222 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1223 return -EINVAL; 1224 } 1225 1226 /* Clear reflink if we are actually able to set the rt flag. */ 1227 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1228 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1229 1230 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1231 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1232 return -EINVAL; 1233 1234 /* diflags2 only valid for v3 inodes. */ 1235 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1236 if (di_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb)) 1237 return -EINVAL; 1238 1239 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1240 ip->i_d.di_flags2 = di_flags2; 1241 1242 xfs_diflags_to_iflags(ip, false); 1243 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1244 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1245 XFS_STATS_INC(mp, xs_ig_attrchg); 1246 return 0; 1247} 1248 1249static void 1250xfs_ioctl_setattr_prepare_dax( 1251 struct xfs_inode *ip, 1252 struct fsxattr *fa) 1253{ 1254 struct xfs_mount *mp = ip->i_mount; 1255 struct inode *inode = VFS_I(ip); 1256 1257 if (S_ISDIR(inode->i_mode)) 1258 return; 1259 1260 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) || 1261 (mp->m_flags & XFS_MOUNT_DAX_NEVER)) 1262 return; 1263 1264 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 1265 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) || 1266 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 1267 (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))) 1268 d_mark_dontcache(inode); 1269} 1270 1271/* 1272 * Set up the transaction structure for the setattr operation, checking that we 1273 * have permission to do so. On success, return a clean transaction and the 1274 * inode locked exclusively ready for further operation specific checks. On 1275 * failure, return an error without modifying or locking the inode. 1276 */ 1277static struct xfs_trans * 1278xfs_ioctl_setattr_get_trans( 1279 struct xfs_inode *ip) 1280{ 1281 struct xfs_mount *mp = ip->i_mount; 1282 struct xfs_trans *tp; 1283 int error = -EROFS; 1284 1285 if (mp->m_flags & XFS_MOUNT_RDONLY) 1286 goto out_unlock; 1287 error = -EIO; 1288 if (XFS_FORCED_SHUTDOWN(mp)) 1289 goto out_unlock; 1290 1291 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1292 if (error) 1293 goto out_unlock; 1294 1295 xfs_ilock(ip, XFS_ILOCK_EXCL); 1296 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1297 1298 /* 1299 * CAP_FOWNER overrides the following restrictions: 1300 * 1301 * The user ID of the calling process must be equal to the file owner 1302 * ID, except in cases where the CAP_FSETID capability is applicable. 1303 */ 1304 if (!inode_owner_or_capable(VFS_I(ip))) { 1305 error = -EPERM; 1306 goto out_cancel; 1307 } 1308 1309 if (mp->m_flags & XFS_MOUNT_WSYNC) 1310 xfs_trans_set_sync(tp); 1311 1312 return tp; 1313 1314out_cancel: 1315 xfs_trans_cancel(tp); 1316out_unlock: 1317 return ERR_PTR(error); 1318} 1319 1320/* 1321 * extent size hint validation is somewhat cumbersome. Rules are: 1322 * 1323 * 1. extent size hint is only valid for directories and regular files 1324 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1325 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1326 * 4. can only be changed on regular files if no extents are allocated 1327 * 5. can be changed on directories at any time 1328 * 6. extsize hint of 0 turns off hints, clears inode flags. 1329 * 7. Extent size must be a multiple of the appropriate block size. 1330 * 8. for non-realtime files, the extent size hint must be limited 1331 * to half the AG size to avoid alignment extending the extent beyond the 1332 * limits of the AG. 1333 * 1334 * Please keep this function in sync with xfs_scrub_inode_extsize. 1335 */ 1336static int 1337xfs_ioctl_setattr_check_extsize( 1338 struct xfs_inode *ip, 1339 struct fsxattr *fa) 1340{ 1341 struct xfs_mount *mp = ip->i_mount; 1342 xfs_extlen_t size; 1343 xfs_fsblock_t extsize_fsb; 1344 1345 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && 1346 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1347 return -EINVAL; 1348 1349 if (fa->fsx_extsize == 0) 1350 return 0; 1351 1352 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1353 if (extsize_fsb > MAXEXTLEN) 1354 return -EINVAL; 1355 1356 if (XFS_IS_REALTIME_INODE(ip) || 1357 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1358 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1359 } else { 1360 size = mp->m_sb.sb_blocksize; 1361 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1362 return -EINVAL; 1363 } 1364 1365 if (fa->fsx_extsize % size) 1366 return -EINVAL; 1367 1368 return 0; 1369} 1370 1371/* 1372 * CoW extent size hint validation rules are: 1373 * 1374 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1375 * The inode does not have to have any shared blocks, but it must be a v3. 1376 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1377 * for a directory, the hint is propagated to new files. 1378 * 3. Can be changed on files & directories at any time. 1379 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1380 * 5. Extent size must be a multiple of the appropriate block size. 1381 * 6. The extent size hint must be limited to half the AG size to avoid 1382 * alignment extending the extent beyond the limits of the AG. 1383 * 1384 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1385 */ 1386static int 1387xfs_ioctl_setattr_check_cowextsize( 1388 struct xfs_inode *ip, 1389 struct fsxattr *fa) 1390{ 1391 struct xfs_mount *mp = ip->i_mount; 1392 xfs_extlen_t size; 1393 xfs_fsblock_t cowextsize_fsb; 1394 1395 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1396 return 0; 1397 1398 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb)) 1399 return -EINVAL; 1400 1401 if (fa->fsx_cowextsize == 0) 1402 return 0; 1403 1404 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1405 if (cowextsize_fsb > MAXEXTLEN) 1406 return -EINVAL; 1407 1408 size = mp->m_sb.sb_blocksize; 1409 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1410 return -EINVAL; 1411 1412 if (fa->fsx_cowextsize % size) 1413 return -EINVAL; 1414 1415 return 0; 1416} 1417 1418static int 1419xfs_ioctl_setattr_check_projid( 1420 struct xfs_inode *ip, 1421 struct fsxattr *fa) 1422{ 1423 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1424 if (fa->fsx_projid > (uint16_t)-1 && 1425 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1426 return -EINVAL; 1427 return 0; 1428} 1429 1430STATIC int 1431xfs_ioctl_setattr( 1432 xfs_inode_t *ip, 1433 struct fsxattr *fa) 1434{ 1435 struct fsxattr old_fa; 1436 struct xfs_mount *mp = ip->i_mount; 1437 struct xfs_trans *tp; 1438 struct xfs_dquot *pdqp = NULL; 1439 struct xfs_dquot *olddquot = NULL; 1440 int code; 1441 1442 trace_xfs_ioctl_setattr(ip); 1443 1444 code = xfs_ioctl_setattr_check_projid(ip, fa); 1445 if (code) 1446 return code; 1447 1448 /* 1449 * If disk quotas is on, we make sure that the dquots do exist on disk, 1450 * before we start any other transactions. Trying to do this later 1451 * is messy. We don't care to take a readlock to look at the ids 1452 * in inode here, because we can't hold it across the trans_reserve. 1453 * If the IDs do change before we take the ilock, we're covered 1454 * because the i_*dquot fields will get updated anyway. 1455 */ 1456 if (XFS_IS_QUOTA_ON(mp)) { 1457 code = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 1458 VFS_I(ip)->i_gid, fa->fsx_projid, 1459 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 1460 if (code) 1461 return code; 1462 } 1463 1464 xfs_ioctl_setattr_prepare_dax(ip, fa); 1465 1466 tp = xfs_ioctl_setattr_get_trans(ip); 1467 if (IS_ERR(tp)) { 1468 code = PTR_ERR(tp); 1469 goto error_free_dquots; 1470 } 1471 1472 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1473 ip->i_d.di_projid != fa->fsx_projid) { 1474 code = xfs_qm_vop_chown_reserve(tp, ip, NULL, NULL, pdqp, 1475 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1476 if (code) /* out of quota */ 1477 goto error_trans_cancel; 1478 } 1479 1480 xfs_fill_fsxattr(ip, false, &old_fa); 1481 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa); 1482 if (code) 1483 goto error_trans_cancel; 1484 1485 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1486 if (code) 1487 goto error_trans_cancel; 1488 1489 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1490 if (code) 1491 goto error_trans_cancel; 1492 1493 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1494 if (code) 1495 goto error_trans_cancel; 1496 1497 /* 1498 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1499 * overrides the following restrictions: 1500 * 1501 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1502 * successful return from chown() 1503 */ 1504 1505 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1506 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1507 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1508 1509 /* Change the ownerships and register project quota modifications */ 1510 if (ip->i_d.di_projid != fa->fsx_projid) { 1511 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1512 olddquot = xfs_qm_vop_chown(tp, ip, 1513 &ip->i_pdquot, pdqp); 1514 } 1515 ip->i_d.di_projid = fa->fsx_projid; 1516 } 1517 1518 /* 1519 * Only set the extent size hint if we've already determined that the 1520 * extent size hint should be set on the inode. If no extent size flags 1521 * are set on the inode then unconditionally clear the extent size hint. 1522 */ 1523 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1524 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1525 else 1526 ip->i_d.di_extsize = 0; 1527 if (xfs_sb_version_has_v3inode(&mp->m_sb) && 1528 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1529 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1530 mp->m_sb.sb_blocklog; 1531 else 1532 ip->i_d.di_cowextsize = 0; 1533 1534 code = xfs_trans_commit(tp); 1535 1536 /* 1537 * Release any dquot(s) the inode had kept before chown. 1538 */ 1539 xfs_qm_dqrele(olddquot); 1540 xfs_qm_dqrele(pdqp); 1541 1542 return code; 1543 1544error_trans_cancel: 1545 xfs_trans_cancel(tp); 1546error_free_dquots: 1547 xfs_qm_dqrele(pdqp); 1548 return code; 1549} 1550 1551STATIC int 1552xfs_ioc_fssetxattr( 1553 xfs_inode_t *ip, 1554 struct file *filp, 1555 void __user *arg) 1556{ 1557 struct fsxattr fa; 1558 int error; 1559 1560 if (copy_from_user(&fa, arg, sizeof(fa))) 1561 return -EFAULT; 1562 1563 error = mnt_want_write_file(filp); 1564 if (error) 1565 return error; 1566 error = xfs_ioctl_setattr(ip, &fa); 1567 mnt_drop_write_file(filp); 1568 return error; 1569} 1570 1571STATIC int 1572xfs_ioc_getxflags( 1573 xfs_inode_t *ip, 1574 void __user *arg) 1575{ 1576 unsigned int flags; 1577 1578 flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2); 1579 if (copy_to_user(arg, &flags, sizeof(flags))) 1580 return -EFAULT; 1581 return 0; 1582} 1583 1584STATIC int 1585xfs_ioc_setxflags( 1586 struct xfs_inode *ip, 1587 struct file *filp, 1588 void __user *arg) 1589{ 1590 struct xfs_trans *tp; 1591 struct fsxattr fa; 1592 struct fsxattr old_fa; 1593 unsigned int flags; 1594 int error; 1595 1596 if (copy_from_user(&flags, arg, sizeof(flags))) 1597 return -EFAULT; 1598 1599 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1600 FS_NOATIME_FL | FS_NODUMP_FL | \ 1601 FS_SYNC_FL | FS_DAX_FL)) 1602 return -EOPNOTSUPP; 1603 1604 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1605 1606 error = mnt_want_write_file(filp); 1607 if (error) 1608 return error; 1609 1610 xfs_ioctl_setattr_prepare_dax(ip, &fa); 1611 1612 tp = xfs_ioctl_setattr_get_trans(ip); 1613 if (IS_ERR(tp)) { 1614 error = PTR_ERR(tp); 1615 goto out_drop_write; 1616 } 1617 1618 xfs_fill_fsxattr(ip, false, &old_fa); 1619 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa); 1620 if (error) { 1621 xfs_trans_cancel(tp); 1622 goto out_drop_write; 1623 } 1624 1625 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1626 if (error) { 1627 xfs_trans_cancel(tp); 1628 goto out_drop_write; 1629 } 1630 1631 error = xfs_trans_commit(tp); 1632out_drop_write: 1633 mnt_drop_write_file(filp); 1634 return error; 1635} 1636 1637static bool 1638xfs_getbmap_format( 1639 struct kgetbmap *p, 1640 struct getbmapx __user *u, 1641 size_t recsize) 1642{ 1643 if (put_user(p->bmv_offset, &u->bmv_offset) || 1644 put_user(p->bmv_block, &u->bmv_block) || 1645 put_user(p->bmv_length, &u->bmv_length) || 1646 put_user(0, &u->bmv_count) || 1647 put_user(0, &u->bmv_entries)) 1648 return false; 1649 if (recsize < sizeof(struct getbmapx)) 1650 return true; 1651 if (put_user(0, &u->bmv_iflags) || 1652 put_user(p->bmv_oflags, &u->bmv_oflags) || 1653 put_user(0, &u->bmv_unused1) || 1654 put_user(0, &u->bmv_unused2)) 1655 return false; 1656 return true; 1657} 1658 1659STATIC int 1660xfs_ioc_getbmap( 1661 struct file *file, 1662 unsigned int cmd, 1663 void __user *arg) 1664{ 1665 struct getbmapx bmx = { 0 }; 1666 struct kgetbmap *buf; 1667 size_t recsize; 1668 int error, i; 1669 1670 switch (cmd) { 1671 case XFS_IOC_GETBMAPA: 1672 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1673 /*FALLTHRU*/ 1674 case XFS_IOC_GETBMAP: 1675 if (file->f_mode & FMODE_NOCMTIME) 1676 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1677 /* struct getbmap is a strict subset of struct getbmapx. */ 1678 recsize = sizeof(struct getbmap); 1679 break; 1680 case XFS_IOC_GETBMAPX: 1681 recsize = sizeof(struct getbmapx); 1682 break; 1683 default: 1684 return -EINVAL; 1685 } 1686 1687 if (copy_from_user(&bmx, arg, recsize)) 1688 return -EFAULT; 1689 1690 if (bmx.bmv_count < 2) 1691 return -EINVAL; 1692 if (bmx.bmv_count >= INT_MAX / recsize) 1693 return -ENOMEM; 1694 1695 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL); 1696 if (!buf) 1697 return -ENOMEM; 1698 1699 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1700 if (error) 1701 goto out_free_buf; 1702 1703 error = -EFAULT; 1704 if (copy_to_user(arg, &bmx, recsize)) 1705 goto out_free_buf; 1706 arg += recsize; 1707 1708 for (i = 0; i < bmx.bmv_entries; i++) { 1709 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1710 goto out_free_buf; 1711 arg += recsize; 1712 } 1713 1714 error = 0; 1715out_free_buf: 1716 kmem_free(buf); 1717 return error; 1718} 1719 1720STATIC int 1721xfs_ioc_getfsmap( 1722 struct xfs_inode *ip, 1723 struct fsmap_head __user *arg) 1724{ 1725 struct xfs_fsmap_head xhead = {0}; 1726 struct fsmap_head head; 1727 struct fsmap *recs; 1728 unsigned int count; 1729 __u32 last_flags = 0; 1730 bool done = false; 1731 int error; 1732 1733 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1734 return -EFAULT; 1735 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1736 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1737 sizeof(head.fmh_keys[0].fmr_reserved)) || 1738 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1739 sizeof(head.fmh_keys[1].fmr_reserved))) 1740 return -EINVAL; 1741 1742 /* 1743 * Use an internal memory buffer so that we don't have to copy fsmap 1744 * data to userspace while holding locks. Start by trying to allocate 1745 * up to 128k for the buffer, but fall back to a single page if needed. 1746 */ 1747 count = min_t(unsigned int, head.fmh_count, 1748 131072 / sizeof(struct fsmap)); 1749 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1750 if (!recs) { 1751 count = min_t(unsigned int, head.fmh_count, 1752 PAGE_SIZE / sizeof(struct fsmap)); 1753 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1754 if (!recs) 1755 return -ENOMEM; 1756 } 1757 1758 xhead.fmh_iflags = head.fmh_iflags; 1759 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1760 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1761 1762 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1763 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1764 1765 head.fmh_entries = 0; 1766 do { 1767 struct fsmap __user *user_recs; 1768 struct fsmap *last_rec; 1769 1770 user_recs = &arg->fmh_recs[head.fmh_entries]; 1771 xhead.fmh_entries = 0; 1772 xhead.fmh_count = min_t(unsigned int, count, 1773 head.fmh_count - head.fmh_entries); 1774 1775 /* Run query, record how many entries we got. */ 1776 error = xfs_getfsmap(ip->i_mount, &xhead, recs); 1777 switch (error) { 1778 case 0: 1779 /* 1780 * There are no more records in the result set. Copy 1781 * whatever we got to userspace and break out. 1782 */ 1783 done = true; 1784 break; 1785 case -ECANCELED: 1786 /* 1787 * The internal memory buffer is full. Copy whatever 1788 * records we got to userspace and go again if we have 1789 * not yet filled the userspace buffer. 1790 */ 1791 error = 0; 1792 break; 1793 default: 1794 goto out_free; 1795 } 1796 head.fmh_entries += xhead.fmh_entries; 1797 head.fmh_oflags = xhead.fmh_oflags; 1798 1799 /* 1800 * If the caller wanted a record count or there aren't any 1801 * new records to return, we're done. 1802 */ 1803 if (head.fmh_count == 0 || xhead.fmh_entries == 0) 1804 break; 1805 1806 /* Copy all the records we got out to userspace. */ 1807 if (copy_to_user(user_recs, recs, 1808 xhead.fmh_entries * sizeof(struct fsmap))) { 1809 error = -EFAULT; 1810 goto out_free; 1811 } 1812 1813 /* Remember the last record flags we copied to userspace. */ 1814 last_rec = &recs[xhead.fmh_entries - 1]; 1815 last_flags = last_rec->fmr_flags; 1816 1817 /* Set up the low key for the next iteration. */ 1818 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec); 1819 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1820 } while (!done && head.fmh_entries < head.fmh_count); 1821 1822 /* 1823 * If there are no more records in the query result set and we're not 1824 * in counting mode, mark the last record returned with the LAST flag. 1825 */ 1826 if (done && head.fmh_count > 0 && head.fmh_entries > 0) { 1827 struct fsmap __user *user_rec; 1828 1829 last_flags |= FMR_OF_LAST; 1830 user_rec = &arg->fmh_recs[head.fmh_entries - 1]; 1831 1832 if (copy_to_user(&user_rec->fmr_flags, &last_flags, 1833 sizeof(last_flags))) { 1834 error = -EFAULT; 1835 goto out_free; 1836 } 1837 } 1838 1839 /* copy back header */ 1840 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) { 1841 error = -EFAULT; 1842 goto out_free; 1843 } 1844 1845out_free: 1846 kmem_free(recs); 1847 return error; 1848} 1849 1850STATIC int 1851xfs_ioc_scrub_metadata( 1852 struct xfs_inode *ip, 1853 void __user *arg) 1854{ 1855 struct xfs_scrub_metadata scrub; 1856 int error; 1857 1858 if (!capable(CAP_SYS_ADMIN)) 1859 return -EPERM; 1860 1861 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1862 return -EFAULT; 1863 1864 error = xfs_scrub_metadata(ip, &scrub); 1865 if (error) 1866 return error; 1867 1868 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1869 return -EFAULT; 1870 1871 return 0; 1872} 1873 1874int 1875xfs_ioc_swapext( 1876 xfs_swapext_t *sxp) 1877{ 1878 xfs_inode_t *ip, *tip; 1879 struct fd f, tmp; 1880 int error = 0; 1881 1882 /* Pull information for the target fd */ 1883 f = fdget((int)sxp->sx_fdtarget); 1884 if (!f.file) { 1885 error = -EINVAL; 1886 goto out; 1887 } 1888 1889 if (!(f.file->f_mode & FMODE_WRITE) || 1890 !(f.file->f_mode & FMODE_READ) || 1891 (f.file->f_flags & O_APPEND)) { 1892 error = -EBADF; 1893 goto out_put_file; 1894 } 1895 1896 tmp = fdget((int)sxp->sx_fdtmp); 1897 if (!tmp.file) { 1898 error = -EINVAL; 1899 goto out_put_file; 1900 } 1901 1902 if (!(tmp.file->f_mode & FMODE_WRITE) || 1903 !(tmp.file->f_mode & FMODE_READ) || 1904 (tmp.file->f_flags & O_APPEND)) { 1905 error = -EBADF; 1906 goto out_put_tmp_file; 1907 } 1908 1909 if (IS_SWAPFILE(file_inode(f.file)) || 1910 IS_SWAPFILE(file_inode(tmp.file))) { 1911 error = -EINVAL; 1912 goto out_put_tmp_file; 1913 } 1914 1915 /* 1916 * We need to ensure that the fds passed in point to XFS inodes 1917 * before we cast and access them as XFS structures as we have no 1918 * control over what the user passes us here. 1919 */ 1920 if (f.file->f_op != &xfs_file_operations || 1921 tmp.file->f_op != &xfs_file_operations) { 1922 error = -EINVAL; 1923 goto out_put_tmp_file; 1924 } 1925 1926 ip = XFS_I(file_inode(f.file)); 1927 tip = XFS_I(file_inode(tmp.file)); 1928 1929 if (ip->i_mount != tip->i_mount) { 1930 error = -EINVAL; 1931 goto out_put_tmp_file; 1932 } 1933 1934 if (ip->i_ino == tip->i_ino) { 1935 error = -EINVAL; 1936 goto out_put_tmp_file; 1937 } 1938 1939 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1940 error = -EIO; 1941 goto out_put_tmp_file; 1942 } 1943 1944 error = xfs_swap_extents(ip, tip, sxp); 1945 1946 out_put_tmp_file: 1947 fdput(tmp); 1948 out_put_file: 1949 fdput(f); 1950 out: 1951 return error; 1952} 1953 1954static int 1955xfs_ioc_getlabel( 1956 struct xfs_mount *mp, 1957 char __user *user_label) 1958{ 1959 struct xfs_sb *sbp = &mp->m_sb; 1960 char label[XFSLABEL_MAX + 1]; 1961 1962 /* Paranoia */ 1963 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1964 1965 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1966 memset(label, 0, sizeof(label)); 1967 spin_lock(&mp->m_sb_lock); 1968 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1969 spin_unlock(&mp->m_sb_lock); 1970 1971 if (copy_to_user(user_label, label, sizeof(label))) 1972 return -EFAULT; 1973 return 0; 1974} 1975 1976static int 1977xfs_ioc_setlabel( 1978 struct file *filp, 1979 struct xfs_mount *mp, 1980 char __user *newlabel) 1981{ 1982 struct xfs_sb *sbp = &mp->m_sb; 1983 char label[XFSLABEL_MAX + 1]; 1984 size_t len; 1985 int error; 1986 1987 if (!capable(CAP_SYS_ADMIN)) 1988 return -EPERM; 1989 /* 1990 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1991 * smaller, at 12 bytes. We copy one more to be sure we find the 1992 * (required) NULL character to test the incoming label length. 1993 * NB: The on disk label doesn't need to be null terminated. 1994 */ 1995 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1996 return -EFAULT; 1997 len = strnlen(label, XFSLABEL_MAX + 1); 1998 if (len > sizeof(sbp->sb_fname)) 1999 return -EINVAL; 2000 2001 error = mnt_want_write_file(filp); 2002 if (error) 2003 return error; 2004 2005 spin_lock(&mp->m_sb_lock); 2006 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 2007 memcpy(sbp->sb_fname, label, len); 2008 spin_unlock(&mp->m_sb_lock); 2009 2010 /* 2011 * Now we do several things to satisfy userspace. 2012 * In addition to normal logging of the primary superblock, we also 2013 * immediately write these changes to sector zero for the primary, then 2014 * update all backup supers (as xfs_db does for a label change), then 2015 * invalidate the block device page cache. This is so that any prior 2016 * buffered reads from userspace (i.e. from blkid) are invalidated, 2017 * and userspace will see the newly-written label. 2018 */ 2019 error = xfs_sync_sb_buf(mp); 2020 if (error) 2021 goto out; 2022 /* 2023 * growfs also updates backup supers so lock against that. 2024 */ 2025 mutex_lock(&mp->m_growlock); 2026 error = xfs_update_secondary_sbs(mp); 2027 mutex_unlock(&mp->m_growlock); 2028 2029 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 2030 2031out: 2032 mnt_drop_write_file(filp); 2033 return error; 2034} 2035 2036static inline int 2037xfs_fs_eofblocks_from_user( 2038 struct xfs_fs_eofblocks *src, 2039 struct xfs_eofblocks *dst) 2040{ 2041 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 2042 return -EINVAL; 2043 2044 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 2045 return -EINVAL; 2046 2047 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 2048 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 2049 return -EINVAL; 2050 2051 dst->eof_flags = src->eof_flags; 2052 dst->eof_prid = src->eof_prid; 2053 dst->eof_min_file_size = src->eof_min_file_size; 2054 2055 dst->eof_uid = INVALID_UID; 2056 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 2057 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid); 2058 if (!uid_valid(dst->eof_uid)) 2059 return -EINVAL; 2060 } 2061 2062 dst->eof_gid = INVALID_GID; 2063 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 2064 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid); 2065 if (!gid_valid(dst->eof_gid)) 2066 return -EINVAL; 2067 } 2068 return 0; 2069} 2070 2071/* 2072 * Note: some of the ioctl's return positive numbers as a 2073 * byte count indicating success, such as readlink_by_handle. 2074 * So we don't "sign flip" like most other routines. This means 2075 * true errors need to be returned as a negative value. 2076 */ 2077long 2078xfs_file_ioctl( 2079 struct file *filp, 2080 unsigned int cmd, 2081 unsigned long p) 2082{ 2083 struct inode *inode = file_inode(filp); 2084 struct xfs_inode *ip = XFS_I(inode); 2085 struct xfs_mount *mp = ip->i_mount; 2086 void __user *arg = (void __user *)p; 2087 int error; 2088 2089 trace_xfs_file_ioctl(ip); 2090 2091 switch (cmd) { 2092 case FITRIM: 2093 return xfs_ioc_trim(mp, arg); 2094 case FS_IOC_GETFSLABEL: 2095 return xfs_ioc_getlabel(mp, arg); 2096 case FS_IOC_SETFSLABEL: 2097 return xfs_ioc_setlabel(filp, mp, arg); 2098 case XFS_IOC_ALLOCSP: 2099 case XFS_IOC_FREESP: 2100 case XFS_IOC_ALLOCSP64: 2101 case XFS_IOC_FREESP64: { 2102 xfs_flock64_t bf; 2103 2104 if (copy_from_user(&bf, arg, sizeof(bf))) 2105 return -EFAULT; 2106 return xfs_ioc_space(filp, &bf); 2107 } 2108 case XFS_IOC_DIOINFO: { 2109 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 2110 struct dioattr da; 2111 2112 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 2113 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 2114 2115 if (copy_to_user(arg, &da, sizeof(da))) 2116 return -EFAULT; 2117 return 0; 2118 } 2119 2120 case XFS_IOC_FSBULKSTAT_SINGLE: 2121 case XFS_IOC_FSBULKSTAT: 2122 case XFS_IOC_FSINUMBERS: 2123 return xfs_ioc_fsbulkstat(mp, cmd, arg); 2124 2125 case XFS_IOC_BULKSTAT: 2126 return xfs_ioc_bulkstat(mp, cmd, arg); 2127 case XFS_IOC_INUMBERS: 2128 return xfs_ioc_inumbers(mp, cmd, arg); 2129 2130 case XFS_IOC_FSGEOMETRY_V1: 2131 return xfs_ioc_fsgeometry(mp, arg, 3); 2132 case XFS_IOC_FSGEOMETRY_V4: 2133 return xfs_ioc_fsgeometry(mp, arg, 4); 2134 case XFS_IOC_FSGEOMETRY: 2135 return xfs_ioc_fsgeometry(mp, arg, 5); 2136 2137 case XFS_IOC_AG_GEOMETRY: 2138 return xfs_ioc_ag_geometry(mp, arg); 2139 2140 case XFS_IOC_GETVERSION: 2141 return put_user(inode->i_generation, (int __user *)arg); 2142 2143 case XFS_IOC_FSGETXATTR: 2144 return xfs_ioc_fsgetxattr(ip, 0, arg); 2145 case XFS_IOC_FSGETXATTRA: 2146 return xfs_ioc_fsgetxattr(ip, 1, arg); 2147 case XFS_IOC_FSSETXATTR: 2148 return xfs_ioc_fssetxattr(ip, filp, arg); 2149 case XFS_IOC_GETXFLAGS: 2150 return xfs_ioc_getxflags(ip, arg); 2151 case XFS_IOC_SETXFLAGS: 2152 return xfs_ioc_setxflags(ip, filp, arg); 2153 2154 case XFS_IOC_GETBMAP: 2155 case XFS_IOC_GETBMAPA: 2156 case XFS_IOC_GETBMAPX: 2157 return xfs_ioc_getbmap(filp, cmd, arg); 2158 2159 case FS_IOC_GETFSMAP: 2160 return xfs_ioc_getfsmap(ip, arg); 2161 2162 case XFS_IOC_SCRUB_METADATA: 2163 return xfs_ioc_scrub_metadata(ip, arg); 2164 2165 case XFS_IOC_FD_TO_HANDLE: 2166 case XFS_IOC_PATH_TO_HANDLE: 2167 case XFS_IOC_PATH_TO_FSHANDLE: { 2168 xfs_fsop_handlereq_t hreq; 2169 2170 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2171 return -EFAULT; 2172 return xfs_find_handle(cmd, &hreq); 2173 } 2174 case XFS_IOC_OPEN_BY_HANDLE: { 2175 xfs_fsop_handlereq_t hreq; 2176 2177 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2178 return -EFAULT; 2179 return xfs_open_by_handle(filp, &hreq); 2180 } 2181 2182 case XFS_IOC_READLINK_BY_HANDLE: { 2183 xfs_fsop_handlereq_t hreq; 2184 2185 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2186 return -EFAULT; 2187 return xfs_readlink_by_handle(filp, &hreq); 2188 } 2189 case XFS_IOC_ATTRLIST_BY_HANDLE: 2190 return xfs_attrlist_by_handle(filp, arg); 2191 2192 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2193 return xfs_attrmulti_by_handle(filp, arg); 2194 2195 case XFS_IOC_SWAPEXT: { 2196 struct xfs_swapext sxp; 2197 2198 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2199 return -EFAULT; 2200 error = mnt_want_write_file(filp); 2201 if (error) 2202 return error; 2203 error = xfs_ioc_swapext(&sxp); 2204 mnt_drop_write_file(filp); 2205 return error; 2206 } 2207 2208 case XFS_IOC_FSCOUNTS: { 2209 xfs_fsop_counts_t out; 2210 2211 xfs_fs_counts(mp, &out); 2212 2213 if (copy_to_user(arg, &out, sizeof(out))) 2214 return -EFAULT; 2215 return 0; 2216 } 2217 2218 case XFS_IOC_SET_RESBLKS: { 2219 xfs_fsop_resblks_t inout; 2220 uint64_t in; 2221 2222 if (!capable(CAP_SYS_ADMIN)) 2223 return -EPERM; 2224 2225 if (mp->m_flags & XFS_MOUNT_RDONLY) 2226 return -EROFS; 2227 2228 if (copy_from_user(&inout, arg, sizeof(inout))) 2229 return -EFAULT; 2230 2231 error = mnt_want_write_file(filp); 2232 if (error) 2233 return error; 2234 2235 /* input parameter is passed in resblks field of structure */ 2236 in = inout.resblks; 2237 error = xfs_reserve_blocks(mp, &in, &inout); 2238 mnt_drop_write_file(filp); 2239 if (error) 2240 return error; 2241 2242 if (copy_to_user(arg, &inout, sizeof(inout))) 2243 return -EFAULT; 2244 return 0; 2245 } 2246 2247 case XFS_IOC_GET_RESBLKS: { 2248 xfs_fsop_resblks_t out; 2249 2250 if (!capable(CAP_SYS_ADMIN)) 2251 return -EPERM; 2252 2253 error = xfs_reserve_blocks(mp, NULL, &out); 2254 if (error) 2255 return error; 2256 2257 if (copy_to_user(arg, &out, sizeof(out))) 2258 return -EFAULT; 2259 2260 return 0; 2261 } 2262 2263 case XFS_IOC_FSGROWFSDATA: { 2264 xfs_growfs_data_t in; 2265 2266 if (copy_from_user(&in, arg, sizeof(in))) 2267 return -EFAULT; 2268 2269 error = mnt_want_write_file(filp); 2270 if (error) 2271 return error; 2272 error = xfs_growfs_data(mp, &in); 2273 mnt_drop_write_file(filp); 2274 return error; 2275 } 2276 2277 case XFS_IOC_FSGROWFSLOG: { 2278 xfs_growfs_log_t in; 2279 2280 if (copy_from_user(&in, arg, sizeof(in))) 2281 return -EFAULT; 2282 2283 error = mnt_want_write_file(filp); 2284 if (error) 2285 return error; 2286 error = xfs_growfs_log(mp, &in); 2287 mnt_drop_write_file(filp); 2288 return error; 2289 } 2290 2291 case XFS_IOC_FSGROWFSRT: { 2292 xfs_growfs_rt_t in; 2293 2294 if (copy_from_user(&in, arg, sizeof(in))) 2295 return -EFAULT; 2296 2297 error = mnt_want_write_file(filp); 2298 if (error) 2299 return error; 2300 error = xfs_growfs_rt(mp, &in); 2301 mnt_drop_write_file(filp); 2302 return error; 2303 } 2304 2305 case XFS_IOC_GOINGDOWN: { 2306 uint32_t in; 2307 2308 if (!capable(CAP_SYS_ADMIN)) 2309 return -EPERM; 2310 2311 if (get_user(in, (uint32_t __user *)arg)) 2312 return -EFAULT; 2313 2314 return xfs_fs_goingdown(mp, in); 2315 } 2316 2317 case XFS_IOC_ERROR_INJECTION: { 2318 xfs_error_injection_t in; 2319 2320 if (!capable(CAP_SYS_ADMIN)) 2321 return -EPERM; 2322 2323 if (copy_from_user(&in, arg, sizeof(in))) 2324 return -EFAULT; 2325 2326 return xfs_errortag_add(mp, in.errtag); 2327 } 2328 2329 case XFS_IOC_ERROR_CLEARALL: 2330 if (!capable(CAP_SYS_ADMIN)) 2331 return -EPERM; 2332 2333 return xfs_errortag_clearall(mp); 2334 2335 case XFS_IOC_FREE_EOFBLOCKS: { 2336 struct xfs_fs_eofblocks eofb; 2337 struct xfs_eofblocks keofb; 2338 2339 if (!capable(CAP_SYS_ADMIN)) 2340 return -EPERM; 2341 2342 if (mp->m_flags & XFS_MOUNT_RDONLY) 2343 return -EROFS; 2344 2345 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2346 return -EFAULT; 2347 2348 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2349 if (error) 2350 return error; 2351 2352 sb_start_write(mp->m_super); 2353 error = xfs_icache_free_eofblocks(mp, &keofb); 2354 sb_end_write(mp->m_super); 2355 return error; 2356 } 2357 2358 default: 2359 return -ENOTTY; 2360 } 2361} 2362