1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
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_errortag.h"
15 #include "xfs_error.h"
16 #include "xfs_icache.h"
17 #include "xfs_trans.h"
18 #include "xfs_ialloc.h"
21 #include <linux/iversion.h>
24 * Check that none of the inode's in the buffer have a next
25 * unlinked field of 0.
36 for (i = 0; i < M_IGEO(mp)->inodes_per_cluster; i++) {
37 dip = xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize);
38 if (!dip->di_next_unlinked) {
40 "Detected bogus zero next_unlinked field in inode %d buffer 0x%llx.",
41 i, (long long)bp->b_bn);
48 xfs_dinode_good_version(
52 if (xfs_sb_version_hascrc(&mp->m_sb))
55 return version == 1 || version == 2;
59 * If we are doing readahead on an inode buffer, we might be in log recovery
60 * reading an inode allocation buffer that hasn't yet been replayed, and hence
61 * has not had the inode cores stamped into it. Hence for readahead, the buffer
62 * may be potentially invalid.
64 * If the readahead buffer is invalid, we need to mark it with an error and
65 * clear the DONE status of the buffer so that a followup read will re-read it
66 * from disk. We don't report the error otherwise to avoid warnings during log
67 * recovery and we don't get unnecssary panics on debug kernels. We use EIO here
68 * because all we want to do is say readahead failed; there is no-one to report
69 * the error to, so this will distinguish it from a non-ra verifier failure.
70 * Changes to this readahead error behavour also need to be reflected in
71 * xfs_dquot_buf_readahead_verify().
78 struct xfs_mount *mp = bp->b_mount;
84 * Validate the magic number and version of every inode in the buffer
86 agno = xfs_daddr_to_agno(mp, XFS_BUF_ADDR(bp));
87 ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock;
88 for (i = 0; i < ni; i++) {
91 xfs_agino_t unlinked_ino;
93 dip = xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog));
94 unlinked_ino = be32_to_cpu(dip->di_next_unlinked);
95 di_ok = xfs_verify_magic16(bp, dip->di_magic) &&
96 xfs_dinode_good_version(mp, dip->di_version) &&
97 xfs_verify_agino_or_null(mp, agno, unlinked_ino);
98 if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
99 XFS_ERRTAG_ITOBP_INOTOBP))) {
101 bp->b_flags &= ~XBF_DONE;
102 xfs_buf_ioerror(bp, -EIO);
108 "bad inode magic/vsn daddr %lld #%d (magic=%x)",
109 (unsigned long long)bp->b_bn, i,
110 be16_to_cpu(dip->di_magic));
112 xfs_buf_verifier_error(bp, -EFSCORRUPTED,
113 __func__, dip, sizeof(*dip),
122 xfs_inode_buf_read_verify(
125 xfs_inode_buf_verify(bp, false);
129 xfs_inode_buf_readahead_verify(
132 xfs_inode_buf_verify(bp, true);
136 xfs_inode_buf_write_verify(
139 xfs_inode_buf_verify(bp, false);
142 const struct xfs_buf_ops xfs_inode_buf_ops = {
144 .magic16 = { cpu_to_be16(XFS_DINODE_MAGIC),
145 cpu_to_be16(XFS_DINODE_MAGIC) },
146 .verify_read = xfs_inode_buf_read_verify,
147 .verify_write = xfs_inode_buf_write_verify,
150 const struct xfs_buf_ops xfs_inode_buf_ra_ops = {
151 .name = "xfs_inode_ra",
152 .magic16 = { cpu_to_be16(XFS_DINODE_MAGIC),
153 cpu_to_be16(XFS_DINODE_MAGIC) },
154 .verify_read = xfs_inode_buf_readahead_verify,
155 .verify_write = xfs_inode_buf_write_verify,
160 * This routine is called to map an inode to the buffer containing the on-disk
161 * version of the inode. It returns a pointer to the buffer containing the
162 * on-disk inode in the bpp parameter, and in the dipp parameter it returns a
163 * pointer to the on-disk inode within that buffer.
165 * If a non-zero error is returned, then the contents of bpp and dipp are
170 struct xfs_mount *mp,
171 struct xfs_trans *tp,
172 struct xfs_imap *imap,
173 struct xfs_dinode **dipp,
174 struct xfs_buf **bpp,
181 buf_flags |= XBF_UNMAPPED;
182 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno,
183 (int)imap->im_len, buf_flags, &bp,
186 if (error == -EAGAIN) {
187 ASSERT(buf_flags & XBF_TRYLOCK);
190 xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.",
196 *dipp = xfs_buf_offset(bp, imap->im_boffset);
202 struct xfs_inode *ip,
203 struct xfs_dinode *from)
205 struct xfs_icdinode *to = &ip->i_d;
206 struct inode *inode = VFS_I(ip);
210 * Convert v1 inodes immediately to v2 inode format as this is the
211 * minimum inode version format we support in the rest of the code.
213 to->di_version = from->di_version;
214 if (to->di_version == 1) {
215 set_nlink(inode, be16_to_cpu(from->di_onlink));
216 to->di_projid_lo = 0;
217 to->di_projid_hi = 0;
220 set_nlink(inode, be32_to_cpu(from->di_nlink));
221 to->di_projid_lo = be16_to_cpu(from->di_projid_lo);
222 to->di_projid_hi = be16_to_cpu(from->di_projid_hi);
225 to->di_format = from->di_format;
226 to->di_uid = be32_to_cpu(from->di_uid);
227 to->di_gid = be32_to_cpu(from->di_gid);
228 to->di_flushiter = be16_to_cpu(from->di_flushiter);
231 * Time is signed, so need to convert to signed 32 bit before
232 * storing in inode timestamp which may be 64 bit. Otherwise
233 * a time before epoch is converted to a time long after epoch
236 inode->i_atime.tv_sec = (int)be32_to_cpu(from->di_atime.t_sec);
237 inode->i_atime.tv_nsec = (int)be32_to_cpu(from->di_atime.t_nsec);
238 inode->i_mtime.tv_sec = (int)be32_to_cpu(from->di_mtime.t_sec);
239 inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec);
240 inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec);
241 inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec);
242 inode->i_generation = be32_to_cpu(from->di_gen);
243 inode->i_mode = be16_to_cpu(from->di_mode);
245 to->di_size = be64_to_cpu(from->di_size);
246 to->di_nblocks = be64_to_cpu(from->di_nblocks);
247 to->di_extsize = be32_to_cpu(from->di_extsize);
248 to->di_nextents = be32_to_cpu(from->di_nextents);
249 to->di_anextents = be16_to_cpu(from->di_anextents);
250 to->di_forkoff = from->di_forkoff;
251 to->di_aformat = from->di_aformat;
252 to->di_dmevmask = be32_to_cpu(from->di_dmevmask);
253 to->di_dmstate = be16_to_cpu(from->di_dmstate);
254 to->di_flags = be16_to_cpu(from->di_flags);
256 if (to->di_version == 3) {
257 inode_set_iversion_queried(inode,
258 be64_to_cpu(from->di_changecount));
259 to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec);
260 to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec);
261 to->di_flags2 = be64_to_cpu(from->di_flags2);
262 to->di_cowextsize = be32_to_cpu(from->di_cowextsize);
268 struct xfs_inode *ip,
269 struct xfs_dinode *to,
272 struct xfs_icdinode *from = &ip->i_d;
273 struct inode *inode = VFS_I(ip);
275 to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
278 to->di_version = from->di_version;
279 to->di_format = from->di_format;
280 to->di_uid = cpu_to_be32(from->di_uid);
281 to->di_gid = cpu_to_be32(from->di_gid);
282 to->di_projid_lo = cpu_to_be16(from->di_projid_lo);
283 to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
285 memset(to->di_pad, 0, sizeof(to->di_pad));
286 to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec);
287 to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
288 to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec);
289 to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec);
290 to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec);
291 to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
292 to->di_nlink = cpu_to_be32(inode->i_nlink);
293 to->di_gen = cpu_to_be32(inode->i_generation);
294 to->di_mode = cpu_to_be16(inode->i_mode);
296 to->di_size = cpu_to_be64(from->di_size);
297 to->di_nblocks = cpu_to_be64(from->di_nblocks);
298 to->di_extsize = cpu_to_be32(from->di_extsize);
299 to->di_nextents = cpu_to_be32(from->di_nextents);
300 to->di_anextents = cpu_to_be16(from->di_anextents);
301 to->di_forkoff = from->di_forkoff;
302 to->di_aformat = from->di_aformat;
303 to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
304 to->di_dmstate = cpu_to_be16(from->di_dmstate);
305 to->di_flags = cpu_to_be16(from->di_flags);
307 if (from->di_version == 3) {
308 to->di_changecount = cpu_to_be64(inode_peek_iversion(inode));
309 to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
310 to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
311 to->di_flags2 = cpu_to_be64(from->di_flags2);
312 to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
313 to->di_ino = cpu_to_be64(ip->i_ino);
314 to->di_lsn = cpu_to_be64(lsn);
315 memset(to->di_pad2, 0, sizeof(to->di_pad2));
316 uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid);
317 to->di_flushiter = 0;
319 to->di_flushiter = cpu_to_be16(from->di_flushiter);
324 xfs_log_dinode_to_disk(
325 struct xfs_log_dinode *from,
326 struct xfs_dinode *to)
328 to->di_magic = cpu_to_be16(from->di_magic);
329 to->di_mode = cpu_to_be16(from->di_mode);
330 to->di_version = from->di_version;
331 to->di_format = from->di_format;
333 to->di_uid = cpu_to_be32(from->di_uid);
334 to->di_gid = cpu_to_be32(from->di_gid);
335 to->di_nlink = cpu_to_be32(from->di_nlink);
336 to->di_projid_lo = cpu_to_be16(from->di_projid_lo);
337 to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
338 memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
340 to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec);
341 to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec);
342 to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec);
343 to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec);
344 to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec);
345 to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec);
347 to->di_size = cpu_to_be64(from->di_size);
348 to->di_nblocks = cpu_to_be64(from->di_nblocks);
349 to->di_extsize = cpu_to_be32(from->di_extsize);
350 to->di_nextents = cpu_to_be32(from->di_nextents);
351 to->di_anextents = cpu_to_be16(from->di_anextents);
352 to->di_forkoff = from->di_forkoff;
353 to->di_aformat = from->di_aformat;
354 to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
355 to->di_dmstate = cpu_to_be16(from->di_dmstate);
356 to->di_flags = cpu_to_be16(from->di_flags);
357 to->di_gen = cpu_to_be32(from->di_gen);
359 if (from->di_version == 3) {
360 to->di_changecount = cpu_to_be64(from->di_changecount);
361 to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
362 to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
363 to->di_flags2 = cpu_to_be64(from->di_flags2);
364 to->di_cowextsize = cpu_to_be32(from->di_cowextsize);
365 to->di_ino = cpu_to_be64(from->di_ino);
366 to->di_lsn = cpu_to_be64(from->di_lsn);
367 memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
368 uuid_copy(&to->di_uuid, &from->di_uuid);
369 to->di_flushiter = 0;
371 to->di_flushiter = cpu_to_be16(from->di_flushiter);
375 static xfs_failaddr_t
376 xfs_dinode_verify_fork(
377 struct xfs_dinode *dip,
378 struct xfs_mount *mp,
381 uint32_t di_nextents = XFS_DFORK_NEXTENTS(dip, whichfork);
383 switch (XFS_DFORK_FORMAT(dip, whichfork)) {
384 case XFS_DINODE_FMT_LOCAL:
386 * no local regular files yet
388 if (whichfork == XFS_DATA_FORK) {
389 if (S_ISREG(be16_to_cpu(dip->di_mode)))
390 return __this_address;
391 if (be64_to_cpu(dip->di_size) >
392 XFS_DFORK_SIZE(dip, mp, whichfork))
393 return __this_address;
396 return __this_address;
398 case XFS_DINODE_FMT_EXTENTS:
399 if (di_nextents > XFS_DFORK_MAXEXT(dip, mp, whichfork))
400 return __this_address;
402 case XFS_DINODE_FMT_BTREE:
403 if (whichfork == XFS_ATTR_FORK) {
404 if (di_nextents > MAXAEXTNUM)
405 return __this_address;
406 } else if (di_nextents > MAXEXTNUM) {
407 return __this_address;
411 return __this_address;
416 static xfs_failaddr_t
417 xfs_dinode_verify_forkoff(
418 struct xfs_dinode *dip,
419 struct xfs_mount *mp)
421 if (!XFS_DFORK_Q(dip))
424 switch (dip->di_format) {
425 case XFS_DINODE_FMT_DEV:
426 if (dip->di_forkoff != (roundup(sizeof(xfs_dev_t), 8) >> 3))
427 return __this_address;
429 case XFS_DINODE_FMT_LOCAL: /* fall through ... */
430 case XFS_DINODE_FMT_EXTENTS: /* fall through ... */
431 case XFS_DINODE_FMT_BTREE:
432 if (dip->di_forkoff >= (XFS_LITINO(mp, dip->di_version) >> 3))
433 return __this_address;
436 return __this_address;
443 struct xfs_mount *mp,
445 struct xfs_dinode *dip)
453 if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))
454 return __this_address;
456 /* Verify v3 integrity information first */
457 if (dip->di_version >= 3) {
458 if (!xfs_sb_version_hascrc(&mp->m_sb))
459 return __this_address;
460 if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
462 return __this_address;
463 if (be64_to_cpu(dip->di_ino) != ino)
464 return __this_address;
465 if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid))
466 return __this_address;
469 /* don't allow invalid i_size */
470 di_size = be64_to_cpu(dip->di_size);
471 if (di_size & (1ULL << 63))
472 return __this_address;
474 mode = be16_to_cpu(dip->di_mode);
475 if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN)
476 return __this_address;
478 /* No zero-length symlinks/dirs. */
479 if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0)
480 return __this_address;
482 /* Fork checks carried over from xfs_iformat_fork */
484 be32_to_cpu(dip->di_nextents) + be16_to_cpu(dip->di_anextents) >
485 be64_to_cpu(dip->di_nblocks))
486 return __this_address;
488 if (mode && XFS_DFORK_BOFF(dip) > mp->m_sb.sb_inodesize)
489 return __this_address;
491 flags = be16_to_cpu(dip->di_flags);
493 if (mode && (flags & XFS_DIFLAG_REALTIME) && !mp->m_rtdev_targp)
494 return __this_address;
496 /* check for illegal values of forkoff */
497 fa = xfs_dinode_verify_forkoff(dip, mp);
501 /* Do we have appropriate data fork formats for the mode? */
502 switch (mode & S_IFMT) {
507 if (dip->di_format != XFS_DINODE_FMT_DEV)
508 return __this_address;
513 fa = xfs_dinode_verify_fork(dip, mp, XFS_DATA_FORK);
518 /* Uninitialized inode ok. */
521 return __this_address;
524 if (XFS_DFORK_Q(dip)) {
525 fa = xfs_dinode_verify_fork(dip, mp, XFS_ATTR_FORK);
530 * If there is no fork offset, this may be a freshly-made inode
531 * in a new disk cluster, in which case di_aformat is zeroed.
532 * Otherwise, such an inode must be in EXTENTS format; this goes
533 * for freed inodes as well.
535 switch (dip->di_aformat) {
537 case XFS_DINODE_FMT_EXTENTS:
540 return __this_address;
542 if (dip->di_anextents)
543 return __this_address;
546 /* extent size hint validation */
547 fa = xfs_inode_validate_extsize(mp, be32_to_cpu(dip->di_extsize),
552 /* only version 3 or greater inodes are extensively verified here */
553 if (dip->di_version < 3)
556 flags2 = be64_to_cpu(dip->di_flags2);
558 /* don't allow reflink/cowextsize if we don't have reflink */
559 if ((flags2 & (XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE)) &&
560 !xfs_sb_version_hasreflink(&mp->m_sb))
561 return __this_address;
563 /* only regular files get reflink */
564 if ((flags2 & XFS_DIFLAG2_REFLINK) && (mode & S_IFMT) != S_IFREG)
565 return __this_address;
567 /* don't let reflink and realtime mix */
568 if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME))
569 return __this_address;
571 /* don't let reflink and dax mix */
572 if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX))
573 return __this_address;
575 /* COW extent size hint validation */
576 fa = xfs_inode_validate_cowextsize(mp, be32_to_cpu(dip->di_cowextsize),
577 mode, flags, flags2);
586 struct xfs_mount *mp,
587 struct xfs_dinode *dip)
591 if (dip->di_version < 3)
594 ASSERT(xfs_sb_version_hascrc(&mp->m_sb));
595 crc = xfs_start_cksum_update((char *)dip, mp->m_sb.sb_inodesize,
597 dip->di_crc = xfs_end_cksum(crc);
601 * Read the disk inode attributes into the in-core inode structure.
603 * For version 5 superblocks, if we are initialising a new inode and we are not
604 * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new
605 * inode core with a random generation number. If we are keeping inodes around,
606 * we need to read the inode cluster to get the existing generation number off
607 * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode
608 * format) then log recovery is dependent on the di_flushiter field being
609 * initialised from the current on-disk value and hence we must also read the
625 * Fill in the location information in the in-core inode.
627 error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags);
631 /* shortcut IO on inode allocation if possible */
632 if ((iget_flags & XFS_IGET_CREATE) &&
633 xfs_sb_version_hascrc(&mp->m_sb) &&
634 !(mp->m_flags & XFS_MOUNT_IKEEP)) {
635 /* initialise the on-disk inode core */
636 memset(&ip->i_d, 0, sizeof(ip->i_d));
637 VFS_I(ip)->i_generation = prandom_u32();
638 ip->i_d.di_version = 3;
643 * Get pointers to the on-disk inode and the buffer containing it.
645 error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags);
649 /* even unallocated inodes are verified */
650 fa = xfs_dinode_verify(mp, ip->i_ino, dip);
652 xfs_inode_verifier_error(ip, -EFSCORRUPTED, "dinode", dip,
654 error = -EFSCORRUPTED;
659 * If the on-disk inode is already linked to a directory
660 * entry, copy all of the inode into the in-core inode.
661 * xfs_iformat_fork() handles copying in the inode format
662 * specific information.
663 * Otherwise, just get the truly permanent information.
666 xfs_inode_from_disk(ip, dip);
667 error = xfs_iformat_fork(ip, dip);
670 xfs_alert(mp, "%s: xfs_iformat() returned error %d",
677 * Partial initialisation of the in-core inode. Just the bits
678 * that xfs_ialloc won't overwrite or relies on being correct.
680 ip->i_d.di_version = dip->di_version;
681 VFS_I(ip)->i_generation = be32_to_cpu(dip->di_gen);
682 ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
685 * Make sure to pull in the mode here as well in
686 * case the inode is released without being used.
687 * This ensures that xfs_inactive() will see that
688 * the inode is already free and not try to mess
689 * with the uninitialized part of it.
691 VFS_I(ip)->i_mode = 0;
694 ASSERT(ip->i_d.di_version >= 2);
695 ip->i_delayed_blks = 0;
698 * Mark the buffer containing the inode as something to keep
699 * around for a while. This helps to keep recently accessed
700 * meta-data in-core longer.
702 xfs_buf_set_ref(bp, XFS_INO_REF);
705 * Use xfs_trans_brelse() to release the buffer containing the on-disk
706 * inode, because it was acquired with xfs_trans_read_buf() in
707 * xfs_imap_to_bp() above. If tp is NULL, this is just a normal
708 * brelse(). If we're within a transaction, then xfs_trans_brelse()
709 * will only release the buffer if it is not dirty within the
710 * transaction. It will be OK to release the buffer in this case,
711 * because inodes on disk are never destroyed and we will be locking the
712 * new in-core inode before putting it in the cache where other
713 * processes can find it. Thus we don't have to worry about the inode
714 * being changed just because we released the buffer.
717 xfs_trans_brelse(tp, bp);
722 * Validate di_extsize hint.
724 * The rules are documented at xfs_ioctl_setattr_check_extsize().
725 * These functions must be kept in sync with each other.
728 xfs_inode_validate_extsize(
729 struct xfs_mount *mp,
737 uint32_t extsize_bytes;
738 uint32_t blocksize_bytes;
740 rt_flag = (flags & XFS_DIFLAG_REALTIME);
741 hint_flag = (flags & XFS_DIFLAG_EXTSIZE);
742 inherit_flag = (flags & XFS_DIFLAG_EXTSZINHERIT);
743 extsize_bytes = XFS_FSB_TO_B(mp, extsize);
746 blocksize_bytes = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
748 blocksize_bytes = mp->m_sb.sb_blocksize;
750 if ((hint_flag || inherit_flag) && !(S_ISDIR(mode) || S_ISREG(mode)))
751 return __this_address;
753 if (hint_flag && !S_ISREG(mode))
754 return __this_address;
756 if (inherit_flag && !S_ISDIR(mode))
757 return __this_address;
759 if ((hint_flag || inherit_flag) && extsize == 0)
760 return __this_address;
762 /* free inodes get flags set to zero but extsize remains */
763 if (mode && !(hint_flag || inherit_flag) && extsize != 0)
764 return __this_address;
766 if (extsize_bytes % blocksize_bytes)
767 return __this_address;
769 if (extsize > MAXEXTLEN)
770 return __this_address;
772 if (!rt_flag && extsize > mp->m_sb.sb_agblocks / 2)
773 return __this_address;
779 * Validate di_cowextsize hint.
781 * The rules are documented at xfs_ioctl_setattr_check_cowextsize().
782 * These functions must be kept in sync with each other.
785 xfs_inode_validate_cowextsize(
786 struct xfs_mount *mp,
794 uint32_t cowextsize_bytes;
796 rt_flag = (flags & XFS_DIFLAG_REALTIME);
797 hint_flag = (flags2 & XFS_DIFLAG2_COWEXTSIZE);
798 cowextsize_bytes = XFS_FSB_TO_B(mp, cowextsize);
800 if (hint_flag && !xfs_sb_version_hasreflink(&mp->m_sb))
801 return __this_address;
803 if (hint_flag && !(S_ISDIR(mode) || S_ISREG(mode)))
804 return __this_address;
806 if (hint_flag && cowextsize == 0)
807 return __this_address;
809 /* free inodes get flags set to zero but cowextsize remains */
810 if (mode && !hint_flag && cowextsize != 0)
811 return __this_address;
813 if (hint_flag && rt_flag)
814 return __this_address;
816 if (cowextsize_bytes % mp->m_sb.sb_blocksize)
817 return __this_address;
819 if (cowextsize > MAXEXTLEN)
820 return __this_address;
822 if (cowextsize > mp->m_sb.sb_agblocks / 2)
823 return __this_address;