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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2017-2023 Oracle. All Rights Reserved.4 * Author: Darrick J. Wong <djwong@kernel.org>5 */6#include "xfs.h"7#include "xfs_fs.h"8#include "xfs_shared.h"9#include "xfs_format.h"10#include "xfs_trans_resv.h"11#include "xfs_mount.h"12#include "xfs_btree.h"13#include "xfs_log_format.h"14#include "xfs_trans.h"15#include "xfs_ag.h"16#include "xfs_inode.h"17#include "xfs_ialloc.h"18#include "xfs_icache.h"19#include "xfs_da_format.h"20#include "xfs_reflink.h"21#include "xfs_rmap.h"22#include "xfs_bmap_util.h"23#include "xfs_rtbitmap.h"24#include "scrub/scrub.h"25#include "scrub/common.h"26#include "scrub/btree.h"27#include "scrub/trace.h"28#include "scrub/repair.h"29 30/* Prepare the attached inode for scrubbing. */31static inline int32xchk_prepare_iscrub(33 struct xfs_scrub *sc)34{35 int error;36 37 xchk_ilock(sc, XFS_IOLOCK_EXCL);38 39 error = xchk_trans_alloc(sc, 0);40 if (error)41 return error;42 43 error = xchk_ino_dqattach(sc);44 if (error)45 return error;46 47 xchk_ilock(sc, XFS_ILOCK_EXCL);48 return 0;49}50 51/* Install this scrub-by-handle inode and prepare it for scrubbing. */52static inline int53xchk_install_handle_iscrub(54 struct xfs_scrub *sc,55 struct xfs_inode *ip)56{57 int error;58 59 error = xchk_install_handle_inode(sc, ip);60 if (error)61 return error;62 63 return xchk_prepare_iscrub(sc);64}65 66/*67 * Grab total control of the inode metadata. In the best case, we grab the68 * incore inode and take all locks on it. If the incore inode cannot be69 * constructed due to corruption problems, lock the AGI so that we can single70 * step the loading process to fix everything that can go wrong.71 */72int73xchk_setup_inode(74 struct xfs_scrub *sc)75{76 struct xfs_imap imap;77 struct xfs_inode *ip;78 struct xfs_mount *mp = sc->mp;79 struct xfs_inode *ip_in = XFS_I(file_inode(sc->file));80 struct xfs_buf *agi_bp;81 struct xfs_perag *pag;82 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, sc->sm->sm_ino);83 int error;84 85 if (xchk_need_intent_drain(sc))86 xchk_fsgates_enable(sc, XCHK_FSGATES_DRAIN);87 88 /* We want to scan the opened inode, so lock it and exit. */89 if (sc->sm->sm_ino == 0 || sc->sm->sm_ino == ip_in->i_ino) {90 error = xchk_install_live_inode(sc, ip_in);91 if (error)92 return error;93 94 return xchk_prepare_iscrub(sc);95 }96 97 /* Reject internal metadata files and obviously bad inode numbers. */98 if (xfs_internal_inum(mp, sc->sm->sm_ino))99 return -ENOENT;100 if (!xfs_verify_ino(sc->mp, sc->sm->sm_ino))101 return -ENOENT;102 103 /* Try a safe untrusted iget. */104 error = xchk_iget_safe(sc, sc->sm->sm_ino, &ip);105 if (!error)106 return xchk_install_handle_iscrub(sc, ip);107 if (error == -ENOENT)108 return error;109 if (error != -EFSCORRUPTED && error != -EFSBADCRC && error != -EINVAL)110 goto out_error;111 112 /*113 * EINVAL with IGET_UNTRUSTED probably means one of several things:114 * userspace gave us an inode number that doesn't correspond to fs115 * space; the inode btree lacks a record for this inode; or there is116 * a record, and it says this inode is free.117 *118 * EFSCORRUPTED/EFSBADCRC could mean that the inode was mappable, but119 * some other metadata corruption (e.g. inode forks) prevented120 * instantiation of the incore inode. Or it could mean the inobt is121 * corrupt.122 *123 * We want to look up this inode in the inobt directly to distinguish124 * three different scenarios: (1) the inobt says the inode is free,125 * in which case there's nothing to do; (2) the inobt is corrupt so we126 * should flag the corruption and exit to userspace to let it fix the127 * inobt; and (3) the inobt says the inode is allocated, but loading it128 * failed due to corruption.129 *130 * Allocate a transaction and grab the AGI to prevent inobt activity in131 * this AG. Retry the iget in case someone allocated a new inode after132 * the first iget failed.133 */134 error = xchk_trans_alloc(sc, 0);135 if (error)136 goto out_error;137 138 error = xchk_iget_agi(sc, sc->sm->sm_ino, &agi_bp, &ip);139 if (error == 0) {140 /* Actually got the incore inode, so install it and proceed. */141 xchk_trans_cancel(sc);142 return xchk_install_handle_iscrub(sc, ip);143 }144 if (error == -ENOENT)145 goto out_gone;146 if (error != -EFSCORRUPTED && error != -EFSBADCRC && error != -EINVAL)147 goto out_cancel;148 149 /* Ensure that we have protected against inode allocation/freeing. */150 if (agi_bp == NULL) {151 ASSERT(agi_bp != NULL);152 error = -ECANCELED;153 goto out_cancel;154 }155 156 /*157 * Untrusted iget failed a second time. Let's try an inobt lookup.158 * If the inobt doesn't think this is an allocated inode then we'll159 * return ENOENT to signal that the check can be skipped.160 *161 * If the lookup signals corruption, we'll mark this inode corrupt and162 * exit to userspace. There's little chance of fixing anything until163 * the inobt is straightened out, but there's nothing we can do here.164 *165 * If the lookup encounters a runtime error, exit to userspace.166 */167 pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, sc->sm->sm_ino));168 if (!pag) {169 error = -EFSCORRUPTED;170 goto out_cancel;171 }172 173 error = xfs_imap(pag, sc->tp, sc->sm->sm_ino, &imap,174 XFS_IGET_UNTRUSTED);175 xfs_perag_put(pag);176 if (error == -EINVAL || error == -ENOENT)177 goto out_gone;178 if (error)179 goto out_cancel;180 181 /*182 * The lookup succeeded. Chances are the ondisk inode is corrupt and183 * preventing iget from reading it. Retain the scrub transaction and184 * the AGI buffer to prevent anyone from allocating or freeing inodes.185 * This ensures that we preserve the inconsistency between the inobt186 * saying the inode is allocated and the icache being unable to load187 * the inode until we can flag the corruption in xchk_inode. The188 * scrub function has to note the corruption, since we're not really189 * supposed to do that from the setup function. Save the mapping to190 * make repairs to the ondisk inode buffer.191 */192 if (xchk_could_repair(sc))193 xrep_setup_inode(sc, &imap);194 return 0;195 196out_cancel:197 xchk_trans_cancel(sc);198out_error:199 trace_xchk_op_error(sc, agno, XFS_INO_TO_AGBNO(mp, sc->sm->sm_ino),200 error, __return_address);201 return error;202out_gone:203 /* The file is gone, so there's nothing to check. */204 xchk_trans_cancel(sc);205 return -ENOENT;206}207 208/* Inode core */209 210/* Validate di_extsize hint. */211STATIC void212xchk_inode_extsize(213 struct xfs_scrub *sc,214 struct xfs_dinode *dip,215 xfs_ino_t ino,216 uint16_t mode,217 uint16_t flags)218{219 xfs_failaddr_t fa;220 uint32_t value = be32_to_cpu(dip->di_extsize);221 222 fa = xfs_inode_validate_extsize(sc->mp, value, mode, flags);223 if (fa)224 xchk_ino_set_corrupt(sc, ino);225 226 /*227 * XFS allows a sysadmin to change the rt extent size when adding a rt228 * section to a filesystem after formatting. If there are any229 * directories with extszinherit and rtinherit set, the hint could230 * become misaligned with the new rextsize. The verifier doesn't check231 * this, because we allow rtinherit directories even without an rt232 * device. Flag this as an administrative warning since we will clean233 * this up eventually.234 */235 if ((flags & XFS_DIFLAG_RTINHERIT) &&236 (flags & XFS_DIFLAG_EXTSZINHERIT) &&237 xfs_extlen_to_rtxmod(sc->mp, value) > 0)238 xchk_ino_set_warning(sc, ino);239}240 241/*242 * Validate di_cowextsize hint.243 *244 * The rules are documented at xfs_ioctl_setattr_check_cowextsize().245 * These functions must be kept in sync with each other.246 */247STATIC void248xchk_inode_cowextsize(249 struct xfs_scrub *sc,250 struct xfs_dinode *dip,251 xfs_ino_t ino,252 uint16_t mode,253 uint16_t flags,254 uint64_t flags2)255{256 xfs_failaddr_t fa;257 258 fa = xfs_inode_validate_cowextsize(sc->mp,259 be32_to_cpu(dip->di_cowextsize), mode, flags,260 flags2);261 if (fa)262 xchk_ino_set_corrupt(sc, ino);263}264 265/* Make sure the di_flags make sense for the inode. */266STATIC void267xchk_inode_flags(268 struct xfs_scrub *sc,269 struct xfs_dinode *dip,270 xfs_ino_t ino,271 uint16_t mode,272 uint16_t flags)273{274 struct xfs_mount *mp = sc->mp;275 276 /* di_flags are all taken, last bit cannot be used */277 if (flags & ~XFS_DIFLAG_ANY)278 goto bad;279 280 /* rt flags require rt device */281 if ((flags & XFS_DIFLAG_REALTIME) && !mp->m_rtdev_targp)282 goto bad;283 284 /* new rt bitmap flag only valid for rbmino */285 if ((flags & XFS_DIFLAG_NEWRTBM) && ino != mp->m_sb.sb_rbmino)286 goto bad;287 288 /* directory-only flags */289 if ((flags & (XFS_DIFLAG_RTINHERIT |290 XFS_DIFLAG_EXTSZINHERIT |291 XFS_DIFLAG_PROJINHERIT |292 XFS_DIFLAG_NOSYMLINKS)) &&293 !S_ISDIR(mode))294 goto bad;295 296 /* file-only flags */297 if ((flags & (XFS_DIFLAG_REALTIME | FS_XFLAG_EXTSIZE)) &&298 !S_ISREG(mode))299 goto bad;300 301 /* filestreams and rt make no sense */302 if ((flags & XFS_DIFLAG_FILESTREAM) && (flags & XFS_DIFLAG_REALTIME))303 goto bad;304 305 return;306bad:307 xchk_ino_set_corrupt(sc, ino);308}309 310/* Make sure the di_flags2 make sense for the inode. */311STATIC void312xchk_inode_flags2(313 struct xfs_scrub *sc,314 struct xfs_dinode *dip,315 xfs_ino_t ino,316 uint16_t mode,317 uint16_t flags,318 uint64_t flags2)319{320 struct xfs_mount *mp = sc->mp;321 322 /* Unknown di_flags2 could be from a future kernel */323 if (flags2 & ~XFS_DIFLAG2_ANY)324 xchk_ino_set_warning(sc, ino);325 326 /* reflink flag requires reflink feature */327 if ((flags2 & XFS_DIFLAG2_REFLINK) &&328 !xfs_has_reflink(mp))329 goto bad;330 331 /* cowextsize flag is checked w.r.t. mode separately */332 333 /* file/dir-only flags */334 if ((flags2 & XFS_DIFLAG2_DAX) && !(S_ISREG(mode) || S_ISDIR(mode)))335 goto bad;336 337 /* file-only flags */338 if ((flags2 & XFS_DIFLAG2_REFLINK) && !S_ISREG(mode))339 goto bad;340 341 /* realtime and reflink make no sense, currently */342 if ((flags & XFS_DIFLAG_REALTIME) && (flags2 & XFS_DIFLAG2_REFLINK))343 goto bad;344 345 /* no bigtime iflag without the bigtime feature */346 if (xfs_dinode_has_bigtime(dip) && !xfs_has_bigtime(mp))347 goto bad;348 349 /* no large extent counts without the filesystem feature */350 if ((flags2 & XFS_DIFLAG2_NREXT64) && !xfs_has_large_extent_counts(mp))351 goto bad;352 353 return;354bad:355 xchk_ino_set_corrupt(sc, ino);356}357 358static inline void359xchk_dinode_nsec(360 struct xfs_scrub *sc,361 xfs_ino_t ino,362 struct xfs_dinode *dip,363 const xfs_timestamp_t ts)364{365 struct timespec64 tv;366 367 tv = xfs_inode_from_disk_ts(dip, ts);368 if (tv.tv_nsec < 0 || tv.tv_nsec >= NSEC_PER_SEC)369 xchk_ino_set_corrupt(sc, ino);370}371 372/* Scrub all the ondisk inode fields. */373STATIC void374xchk_dinode(375 struct xfs_scrub *sc,376 struct xfs_dinode *dip,377 xfs_ino_t ino)378{379 struct xfs_mount *mp = sc->mp;380 size_t fork_recs;381 unsigned long long isize;382 uint64_t flags2;383 xfs_extnum_t nextents;384 xfs_extnum_t naextents;385 prid_t prid;386 uint16_t flags;387 uint16_t mode;388 389 flags = be16_to_cpu(dip->di_flags);390 if (dip->di_version >= 3)391 flags2 = be64_to_cpu(dip->di_flags2);392 else393 flags2 = 0;394 395 /* di_mode */396 mode = be16_to_cpu(dip->di_mode);397 switch (mode & S_IFMT) {398 case S_IFLNK:399 case S_IFREG:400 case S_IFDIR:401 case S_IFCHR:402 case S_IFBLK:403 case S_IFIFO:404 case S_IFSOCK:405 /* mode is recognized */406 break;407 default:408 xchk_ino_set_corrupt(sc, ino);409 break;410 }411 412 /* v1/v2 fields */413 switch (dip->di_version) {414 case 1:415 /*416 * We autoconvert v1 inodes into v2 inodes on writeout,417 * so just mark this inode for preening.418 */419 xchk_ino_set_preen(sc, ino);420 prid = 0;421 break;422 case 2:423 case 3:424 if (dip->di_onlink != 0)425 xchk_ino_set_corrupt(sc, ino);426 427 if (dip->di_mode == 0 && sc->ip)428 xchk_ino_set_corrupt(sc, ino);429 430 if (dip->di_projid_hi != 0 &&431 !xfs_has_projid32(mp))432 xchk_ino_set_corrupt(sc, ino);433 434 prid = be16_to_cpu(dip->di_projid_lo);435 break;436 default:437 xchk_ino_set_corrupt(sc, ino);438 return;439 }440 441 if (xfs_has_projid32(mp))442 prid |= (prid_t)be16_to_cpu(dip->di_projid_hi) << 16;443 444 /*445 * di_uid/di_gid -- -1 isn't invalid, but there's no way that446 * userspace could have created that.447 */448 if (dip->di_uid == cpu_to_be32(-1U) ||449 dip->di_gid == cpu_to_be32(-1U))450 xchk_ino_set_warning(sc, ino);451 452 /*453 * project id of -1 isn't supposed to be valid, but the kernel didn't454 * always validate that.455 */456 if (prid == -1U)457 xchk_ino_set_warning(sc, ino);458 459 /* di_format */460 switch (dip->di_format) {461 case XFS_DINODE_FMT_DEV:462 if (!S_ISCHR(mode) && !S_ISBLK(mode) &&463 !S_ISFIFO(mode) && !S_ISSOCK(mode))464 xchk_ino_set_corrupt(sc, ino);465 break;466 case XFS_DINODE_FMT_LOCAL:467 if (!S_ISDIR(mode) && !S_ISLNK(mode))468 xchk_ino_set_corrupt(sc, ino);469 break;470 case XFS_DINODE_FMT_EXTENTS:471 if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))472 xchk_ino_set_corrupt(sc, ino);473 break;474 case XFS_DINODE_FMT_BTREE:475 if (!S_ISREG(mode) && !S_ISDIR(mode))476 xchk_ino_set_corrupt(sc, ino);477 break;478 case XFS_DINODE_FMT_UUID:479 default:480 xchk_ino_set_corrupt(sc, ino);481 break;482 }483 484 /* di_[amc]time.nsec */485 xchk_dinode_nsec(sc, ino, dip, dip->di_atime);486 xchk_dinode_nsec(sc, ino, dip, dip->di_mtime);487 xchk_dinode_nsec(sc, ino, dip, dip->di_ctime);488 489 /*490 * di_size. xfs_dinode_verify checks for things that screw up491 * the VFS such as the upper bit being set and zero-length492 * symlinks/directories, but we can do more here.493 */494 isize = be64_to_cpu(dip->di_size);495 if (isize & (1ULL << 63))496 xchk_ino_set_corrupt(sc, ino);497 498 /* Devices, fifos, and sockets must have zero size */499 if (!S_ISDIR(mode) && !S_ISREG(mode) && !S_ISLNK(mode) && isize != 0)500 xchk_ino_set_corrupt(sc, ino);501 502 /* Directories can't be larger than the data section size (32G) */503 if (S_ISDIR(mode) && (isize == 0 || isize >= XFS_DIR2_SPACE_SIZE))504 xchk_ino_set_corrupt(sc, ino);505 506 /* Symlinks can't be larger than SYMLINK_MAXLEN */507 if (S_ISLNK(mode) && (isize == 0 || isize >= XFS_SYMLINK_MAXLEN))508 xchk_ino_set_corrupt(sc, ino);509 510 /*511 * Warn if the running kernel can't handle the kinds of offsets512 * needed to deal with the file size. In other words, if the513 * pagecache can't cache all the blocks in this file due to514 * overly large offsets, flag the inode for admin review.515 */516 if (isize > mp->m_super->s_maxbytes)517 xchk_ino_set_warning(sc, ino);518 519 /* di_nblocks */520 if (flags2 & XFS_DIFLAG2_REFLINK) {521 ; /* nblocks can exceed dblocks */522 } else if (flags & XFS_DIFLAG_REALTIME) {523 /*524 * nblocks is the sum of data extents (in the rtdev),525 * attr extents (in the datadev), and both forks' bmbt526 * blocks (in the datadev). This clumsy check is the527 * best we can do without cross-referencing with the528 * inode forks.529 */530 if (be64_to_cpu(dip->di_nblocks) >=531 mp->m_sb.sb_dblocks + mp->m_sb.sb_rblocks)532 xchk_ino_set_corrupt(sc, ino);533 } else {534 if (be64_to_cpu(dip->di_nblocks) >= mp->m_sb.sb_dblocks)535 xchk_ino_set_corrupt(sc, ino);536 }537 538 xchk_inode_flags(sc, dip, ino, mode, flags);539 540 xchk_inode_extsize(sc, dip, ino, mode, flags);541 542 nextents = xfs_dfork_data_extents(dip);543 naextents = xfs_dfork_attr_extents(dip);544 545 /* di_nextents */546 fork_recs = XFS_DFORK_DSIZE(dip, mp) / sizeof(struct xfs_bmbt_rec);547 switch (dip->di_format) {548 case XFS_DINODE_FMT_EXTENTS:549 if (nextents > fork_recs)550 xchk_ino_set_corrupt(sc, ino);551 break;552 case XFS_DINODE_FMT_BTREE:553 if (nextents <= fork_recs)554 xchk_ino_set_corrupt(sc, ino);555 break;556 default:557 if (nextents != 0)558 xchk_ino_set_corrupt(sc, ino);559 break;560 }561 562 /* di_forkoff */563 if (XFS_DFORK_BOFF(dip) >= mp->m_sb.sb_inodesize)564 xchk_ino_set_corrupt(sc, ino);565 if (naextents != 0 && dip->di_forkoff == 0)566 xchk_ino_set_corrupt(sc, ino);567 if (dip->di_forkoff == 0 && dip->di_aformat != XFS_DINODE_FMT_EXTENTS)568 xchk_ino_set_corrupt(sc, ino);569 570 /* di_aformat */571 if (dip->di_aformat != XFS_DINODE_FMT_LOCAL &&572 dip->di_aformat != XFS_DINODE_FMT_EXTENTS &&573 dip->di_aformat != XFS_DINODE_FMT_BTREE)574 xchk_ino_set_corrupt(sc, ino);575 576 /* di_anextents */577 fork_recs = XFS_DFORK_ASIZE(dip, mp) / sizeof(struct xfs_bmbt_rec);578 switch (dip->di_aformat) {579 case XFS_DINODE_FMT_EXTENTS:580 if (naextents > fork_recs)581 xchk_ino_set_corrupt(sc, ino);582 break;583 case XFS_DINODE_FMT_BTREE:584 if (naextents <= fork_recs)585 xchk_ino_set_corrupt(sc, ino);586 break;587 default:588 if (naextents != 0)589 xchk_ino_set_corrupt(sc, ino);590 }591 592 if (dip->di_version >= 3) {593 xchk_dinode_nsec(sc, ino, dip, dip->di_crtime);594 xchk_inode_flags2(sc, dip, ino, mode, flags, flags2);595 xchk_inode_cowextsize(sc, dip, ino, mode, flags,596 flags2);597 }598}599 600/*601 * Make sure the finobt doesn't think this inode is free.602 * We don't have to check the inobt ourselves because we got the inode via603 * IGET_UNTRUSTED, which checks the inobt for us.604 */605static void606xchk_inode_xref_finobt(607 struct xfs_scrub *sc,608 xfs_ino_t ino)609{610 struct xfs_inobt_rec_incore rec;611 xfs_agino_t agino;612 int has_record;613 int error;614 615 if (!sc->sa.fino_cur || xchk_skip_xref(sc->sm))616 return;617 618 agino = XFS_INO_TO_AGINO(sc->mp, ino);619 620 /*621 * Try to get the finobt record. If we can't get it, then we're622 * in good shape.623 */624 error = xfs_inobt_lookup(sc->sa.fino_cur, agino, XFS_LOOKUP_LE,625 &has_record);626 if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||627 !has_record)628 return;629 630 error = xfs_inobt_get_rec(sc->sa.fino_cur, &rec, &has_record);631 if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||632 !has_record)633 return;634 635 /*636 * Otherwise, make sure this record either doesn't cover this inode,637 * or that it does but it's marked present.638 */639 if (rec.ir_startino > agino ||640 rec.ir_startino + XFS_INODES_PER_CHUNK <= agino)641 return;642 643 if (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino))644 xchk_btree_xref_set_corrupt(sc, sc->sa.fino_cur, 0);645}646 647/* Cross reference the inode fields with the forks. */648STATIC void649xchk_inode_xref_bmap(650 struct xfs_scrub *sc,651 struct xfs_dinode *dip)652{653 xfs_extnum_t nextents;654 xfs_filblks_t count;655 xfs_filblks_t acount;656 int error;657 658 if (xchk_skip_xref(sc->sm))659 return;660 661 /* Walk all the extents to check nextents/naextents/nblocks. */662 error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_DATA_FORK,663 &nextents, &count);664 if (!xchk_should_check_xref(sc, &error, NULL))665 return;666 if (nextents < xfs_dfork_data_extents(dip))667 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);668 669 error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_ATTR_FORK,670 &nextents, &acount);671 if (!xchk_should_check_xref(sc, &error, NULL))672 return;673 if (nextents != xfs_dfork_attr_extents(dip))674 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);675 676 /* Check nblocks against the inode. */677 if (count + acount != be64_to_cpu(dip->di_nblocks))678 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);679}680 681/* Cross-reference with the other btrees. */682STATIC void683xchk_inode_xref(684 struct xfs_scrub *sc,685 xfs_ino_t ino,686 struct xfs_dinode *dip)687{688 xfs_agnumber_t agno;689 xfs_agblock_t agbno;690 int error;691 692 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)693 return;694 695 agno = XFS_INO_TO_AGNO(sc->mp, ino);696 agbno = XFS_INO_TO_AGBNO(sc->mp, ino);697 698 error = xchk_ag_init_existing(sc, agno, &sc->sa);699 if (!xchk_xref_process_error(sc, agno, agbno, &error))700 goto out_free;701 702 xchk_xref_is_used_space(sc, agbno, 1);703 xchk_inode_xref_finobt(sc, ino);704 xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_INODES);705 xchk_xref_is_not_shared(sc, agbno, 1);706 xchk_xref_is_not_cow_staging(sc, agbno, 1);707 xchk_inode_xref_bmap(sc, dip);708 709out_free:710 xchk_ag_free(sc, &sc->sa);711}712 713/*714 * If the reflink iflag disagrees with a scan for shared data fork extents,715 * either flag an error (shared extents w/ no flag) or a preen (flag set w/o716 * any shared extents). We already checked for reflink iflag set on a non717 * reflink filesystem.718 */719static void720xchk_inode_check_reflink_iflag(721 struct xfs_scrub *sc,722 xfs_ino_t ino)723{724 struct xfs_mount *mp = sc->mp;725 bool has_shared;726 int error;727 728 if (!xfs_has_reflink(mp))729 return;730 731 error = xfs_reflink_inode_has_shared_extents(sc->tp, sc->ip,732 &has_shared);733 if (!xchk_xref_process_error(sc, XFS_INO_TO_AGNO(mp, ino),734 XFS_INO_TO_AGBNO(mp, ino), &error))735 return;736 if (xfs_is_reflink_inode(sc->ip) && !has_shared)737 xchk_ino_set_preen(sc, ino);738 else if (!xfs_is_reflink_inode(sc->ip) && has_shared)739 xchk_ino_set_corrupt(sc, ino);740}741 742/*743 * If this inode has zero link count, it must be on the unlinked list. If744 * it has nonzero link count, it must not be on the unlinked list.745 */746STATIC void747xchk_inode_check_unlinked(748 struct xfs_scrub *sc)749{750 if (VFS_I(sc->ip)->i_nlink == 0) {751 if (!xfs_inode_on_unlinked_list(sc->ip))752 xchk_ino_set_corrupt(sc, sc->ip->i_ino);753 } else {754 if (xfs_inode_on_unlinked_list(sc->ip))755 xchk_ino_set_corrupt(sc, sc->ip->i_ino);756 }757}758 759/* Scrub an inode. */760int761xchk_inode(762 struct xfs_scrub *sc)763{764 struct xfs_dinode di;765 int error = 0;766 767 /*768 * If sc->ip is NULL, that means that the setup function called769 * xfs_iget to look up the inode. xfs_iget returned a EFSCORRUPTED770 * and a NULL inode, so flag the corruption error and return.771 */772 if (!sc->ip) {773 xchk_ino_set_corrupt(sc, sc->sm->sm_ino);774 return 0;775 }776 777 /* Scrub the inode core. */778 xfs_inode_to_disk(sc->ip, &di, 0);779 xchk_dinode(sc, &di, sc->ip->i_ino);780 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)781 goto out;782 783 /*784 * Look for discrepancies between file's data blocks and the reflink785 * iflag. We already checked the iflag against the file mode when786 * we scrubbed the dinode.787 */788 if (S_ISREG(VFS_I(sc->ip)->i_mode))789 xchk_inode_check_reflink_iflag(sc, sc->ip->i_ino);790 791 xchk_inode_check_unlinked(sc);792 793 xchk_inode_xref(sc, sc->ip->i_ino, &di);794out:795 return error;796}797