2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 #include "libxfs_priv.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_defer.h"
26 #include "xfs_inode.h"
27 #include "xfs_errortag.h"
28 #include "xfs_cksum.h"
29 #include "xfs_trans.h"
30 #include "xfs_ialloc.h"
34 * Check that none of the inode's in the buffer have a next
35 * unlinked field of 0.
47 j
= mp
->m_inode_cluster_size
>> mp
->m_sb
.sb_inodelog
;
49 for (i
= 0; i
< j
; i
++) {
50 dip
= xfs_buf_offset(bp
, i
* mp
->m_sb
.sb_inodesize
);
51 if (!dip
->di_next_unlinked
) {
53 "Detected bogus zero next_unlinked field in inode %d buffer 0x%llx.",
54 i
, (long long)bp
->b_bn
);
61 xfs_dinode_good_version(
65 if (xfs_sb_version_hascrc(&mp
->m_sb
))
68 return version
== 1 || version
== 2;
72 * If we are doing readahead on an inode buffer, we might be in log recovery
73 * reading an inode allocation buffer that hasn't yet been replayed, and hence
74 * has not had the inode cores stamped into it. Hence for readahead, the buffer
75 * may be potentially invalid.
77 * If the readahead buffer is invalid, we need to mark it with an error and
78 * clear the DONE status of the buffer so that a followup read will re-read it
79 * from disk. We don't report the error otherwise to avoid warnings during log
80 * recovery and we don't get unnecssary panics on debug kernels. We use EIO here
81 * because all we want to do is say readahead failed; there is no-one to report
82 * the error to, so this will distinguish it from a non-ra verifier failure.
83 * Changes to this readahead error behavour also need to be reflected in
84 * xfs_dquot_buf_readahead_verify().
91 struct xfs_mount
*mp
= bp
->b_target
->bt_mount
;
97 * Validate the magic number and version of every inode in the buffer
99 agno
= xfs_daddr_to_agno(mp
, XFS_BUF_ADDR(bp
));
100 ni
= XFS_BB_TO_FSB(mp
, bp
->b_length
) * mp
->m_sb
.sb_inopblock
;
101 for (i
= 0; i
< ni
; i
++) {
104 xfs_agino_t unlinked_ino
;
106 dip
= xfs_buf_offset(bp
, (i
<< mp
->m_sb
.sb_inodelog
));
107 unlinked_ino
= be32_to_cpu(dip
->di_next_unlinked
);
108 di_ok
= dip
->di_magic
== cpu_to_be16(XFS_DINODE_MAGIC
) &&
109 xfs_dinode_good_version(mp
, dip
->di_version
) &&
110 (unlinked_ino
== NULLAGINO
||
111 xfs_verify_agino(mp
, agno
, unlinked_ino
));
112 if (unlikely(XFS_TEST_ERROR(!di_ok
, mp
,
113 XFS_ERRTAG_ITOBP_INOTOBP
))) {
115 bp
->b_flags
&= ~XBF_DONE
;
116 xfs_buf_ioerror(bp
, -EIO
);
122 "bad inode magic/vsn daddr %lld #%d (magic=%x)",
123 (unsigned long long)bp
->b_bn
, i
,
124 be16_to_cpu(dip
->di_magic
));
126 xfs_buf_verifier_error(bp
, -EFSCORRUPTED
,
127 __func__
, dip
, sizeof(*dip
),
136 xfs_inode_buf_read_verify(
139 xfs_inode_buf_verify(bp
, false);
143 xfs_inode_buf_readahead_verify(
146 xfs_inode_buf_verify(bp
, true);
150 xfs_inode_buf_write_verify(
153 xfs_inode_buf_verify(bp
, false);
156 const struct xfs_buf_ops xfs_inode_buf_ops
= {
158 .verify_read
= xfs_inode_buf_read_verify
,
159 .verify_write
= xfs_inode_buf_write_verify
,
162 const struct xfs_buf_ops xfs_inode_buf_ra_ops
= {
163 .name
= "xxfs_inode_ra",
164 .verify_read
= xfs_inode_buf_readahead_verify
,
165 .verify_write
= xfs_inode_buf_write_verify
,
170 * This routine is called to map an inode to the buffer containing the on-disk
171 * version of the inode. It returns a pointer to the buffer containing the
172 * on-disk inode in the bpp parameter, and in the dipp parameter it returns a
173 * pointer to the on-disk inode within that buffer.
175 * If a non-zero error is returned, then the contents of bpp and dipp are
180 struct xfs_mount
*mp
,
181 struct xfs_trans
*tp
,
182 struct xfs_imap
*imap
,
183 struct xfs_dinode
**dipp
,
184 struct xfs_buf
**bpp
,
191 buf_flags
|= XBF_UNMAPPED
;
192 error
= xfs_trans_read_buf(mp
, tp
, mp
->m_ddev_targp
, imap
->im_blkno
,
193 (int)imap
->im_len
, buf_flags
, &bp
,
196 if (error
== -EAGAIN
) {
197 ASSERT(buf_flags
& XBF_TRYLOCK
);
201 if (error
== -EFSCORRUPTED
&&
202 (iget_flags
& XFS_IGET_UNTRUSTED
))
205 xfs_warn(mp
, "%s: xfs_trans_read_buf() returned error %d.",
211 *dipp
= xfs_buf_offset(bp
, imap
->im_boffset
);
217 struct xfs_inode
*ip
,
218 struct xfs_dinode
*from
)
220 struct xfs_icdinode
*to
= &ip
->i_d
;
221 struct inode
*inode
= VFS_I(ip
);
225 * Convert v1 inodes immediately to v2 inode format as this is the
226 * minimum inode version format we support in the rest of the code.
228 to
->di_version
= from
->di_version
;
229 if (to
->di_version
== 1) {
230 set_nlink(inode
, be16_to_cpu(from
->di_onlink
));
231 to
->di_projid_lo
= 0;
232 to
->di_projid_hi
= 0;
235 set_nlink(inode
, be32_to_cpu(from
->di_nlink
));
236 to
->di_projid_lo
= be16_to_cpu(from
->di_projid_lo
);
237 to
->di_projid_hi
= be16_to_cpu(from
->di_projid_hi
);
240 to
->di_format
= from
->di_format
;
241 to
->di_uid
= be32_to_cpu(from
->di_uid
);
242 to
->di_gid
= be32_to_cpu(from
->di_gid
);
243 to
->di_flushiter
= be16_to_cpu(from
->di_flushiter
);
246 * Time is signed, so need to convert to signed 32 bit before
247 * storing in inode timestamp which may be 64 bit. Otherwise
248 * a time before epoch is converted to a time long after epoch
251 inode
->i_atime
.tv_sec
= (int)be32_to_cpu(from
->di_atime
.t_sec
);
252 inode
->i_atime
.tv_nsec
= (int)be32_to_cpu(from
->di_atime
.t_nsec
);
253 inode
->i_mtime
.tv_sec
= (int)be32_to_cpu(from
->di_mtime
.t_sec
);
254 inode
->i_mtime
.tv_nsec
= (int)be32_to_cpu(from
->di_mtime
.t_nsec
);
255 inode
->i_ctime
.tv_sec
= (int)be32_to_cpu(from
->di_ctime
.t_sec
);
256 inode
->i_ctime
.tv_nsec
= (int)be32_to_cpu(from
->di_ctime
.t_nsec
);
257 inode
->i_generation
= be32_to_cpu(from
->di_gen
);
258 inode
->i_mode
= be16_to_cpu(from
->di_mode
);
260 to
->di_size
= be64_to_cpu(from
->di_size
);
261 to
->di_nblocks
= be64_to_cpu(from
->di_nblocks
);
262 to
->di_extsize
= be32_to_cpu(from
->di_extsize
);
263 to
->di_nextents
= be32_to_cpu(from
->di_nextents
);
264 to
->di_anextents
= be16_to_cpu(from
->di_anextents
);
265 to
->di_forkoff
= from
->di_forkoff
;
266 to
->di_aformat
= from
->di_aformat
;
267 to
->di_dmevmask
= be32_to_cpu(from
->di_dmevmask
);
268 to
->di_dmstate
= be16_to_cpu(from
->di_dmstate
);
269 to
->di_flags
= be16_to_cpu(from
->di_flags
);
271 if (to
->di_version
== 3) {
272 inode_set_iversion_queried(inode
,
273 be64_to_cpu(from
->di_changecount
));
274 to
->di_crtime
.t_sec
= be32_to_cpu(from
->di_crtime
.t_sec
);
275 to
->di_crtime
.t_nsec
= be32_to_cpu(from
->di_crtime
.t_nsec
);
276 to
->di_flags2
= be64_to_cpu(from
->di_flags2
);
277 to
->di_cowextsize
= be32_to_cpu(from
->di_cowextsize
);
283 struct xfs_inode
*ip
,
284 struct xfs_dinode
*to
,
287 struct xfs_icdinode
*from
= &ip
->i_d
;
288 struct inode
*inode
= VFS_I(ip
);
290 to
->di_magic
= cpu_to_be16(XFS_DINODE_MAGIC
);
293 to
->di_version
= from
->di_version
;
294 to
->di_format
= from
->di_format
;
295 to
->di_uid
= cpu_to_be32(from
->di_uid
);
296 to
->di_gid
= cpu_to_be32(from
->di_gid
);
297 to
->di_projid_lo
= cpu_to_be16(from
->di_projid_lo
);
298 to
->di_projid_hi
= cpu_to_be16(from
->di_projid_hi
);
300 memset(to
->di_pad
, 0, sizeof(to
->di_pad
));
301 to
->di_atime
.t_sec
= cpu_to_be32(inode
->i_atime
.tv_sec
);
302 to
->di_atime
.t_nsec
= cpu_to_be32(inode
->i_atime
.tv_nsec
);
303 to
->di_mtime
.t_sec
= cpu_to_be32(inode
->i_mtime
.tv_sec
);
304 to
->di_mtime
.t_nsec
= cpu_to_be32(inode
->i_mtime
.tv_nsec
);
305 to
->di_ctime
.t_sec
= cpu_to_be32(inode
->i_ctime
.tv_sec
);
306 to
->di_ctime
.t_nsec
= cpu_to_be32(inode
->i_ctime
.tv_nsec
);
307 to
->di_nlink
= cpu_to_be32(inode
->i_nlink
);
308 to
->di_gen
= cpu_to_be32(inode
->i_generation
);
309 to
->di_mode
= cpu_to_be16(inode
->i_mode
);
311 to
->di_size
= cpu_to_be64(from
->di_size
);
312 to
->di_nblocks
= cpu_to_be64(from
->di_nblocks
);
313 to
->di_extsize
= cpu_to_be32(from
->di_extsize
);
314 to
->di_nextents
= cpu_to_be32(from
->di_nextents
);
315 to
->di_anextents
= cpu_to_be16(from
->di_anextents
);
316 to
->di_forkoff
= from
->di_forkoff
;
317 to
->di_aformat
= from
->di_aformat
;
318 to
->di_dmevmask
= cpu_to_be32(from
->di_dmevmask
);
319 to
->di_dmstate
= cpu_to_be16(from
->di_dmstate
);
320 to
->di_flags
= cpu_to_be16(from
->di_flags
);
322 if (from
->di_version
== 3) {
323 to
->di_changecount
= cpu_to_be64(inode_peek_iversion(inode
));
324 to
->di_crtime
.t_sec
= cpu_to_be32(from
->di_crtime
.t_sec
);
325 to
->di_crtime
.t_nsec
= cpu_to_be32(from
->di_crtime
.t_nsec
);
326 to
->di_flags2
= cpu_to_be64(from
->di_flags2
);
327 to
->di_cowextsize
= cpu_to_be32(from
->di_cowextsize
);
328 to
->di_ino
= cpu_to_be64(ip
->i_ino
);
329 to
->di_lsn
= cpu_to_be64(lsn
);
330 memset(to
->di_pad2
, 0, sizeof(to
->di_pad2
));
331 uuid_copy(&to
->di_uuid
, &ip
->i_mount
->m_sb
.sb_meta_uuid
);
332 to
->di_flushiter
= 0;
334 to
->di_flushiter
= cpu_to_be16(from
->di_flushiter
);
339 xfs_log_dinode_to_disk(
340 struct xfs_log_dinode
*from
,
341 struct xfs_dinode
*to
)
343 to
->di_magic
= cpu_to_be16(from
->di_magic
);
344 to
->di_mode
= cpu_to_be16(from
->di_mode
);
345 to
->di_version
= from
->di_version
;
346 to
->di_format
= from
->di_format
;
348 to
->di_uid
= cpu_to_be32(from
->di_uid
);
349 to
->di_gid
= cpu_to_be32(from
->di_gid
);
350 to
->di_nlink
= cpu_to_be32(from
->di_nlink
);
351 to
->di_projid_lo
= cpu_to_be16(from
->di_projid_lo
);
352 to
->di_projid_hi
= cpu_to_be16(from
->di_projid_hi
);
353 memcpy(to
->di_pad
, from
->di_pad
, sizeof(to
->di_pad
));
355 to
->di_atime
.t_sec
= cpu_to_be32(from
->di_atime
.t_sec
);
356 to
->di_atime
.t_nsec
= cpu_to_be32(from
->di_atime
.t_nsec
);
357 to
->di_mtime
.t_sec
= cpu_to_be32(from
->di_mtime
.t_sec
);
358 to
->di_mtime
.t_nsec
= cpu_to_be32(from
->di_mtime
.t_nsec
);
359 to
->di_ctime
.t_sec
= cpu_to_be32(from
->di_ctime
.t_sec
);
360 to
->di_ctime
.t_nsec
= cpu_to_be32(from
->di_ctime
.t_nsec
);
362 to
->di_size
= cpu_to_be64(from
->di_size
);
363 to
->di_nblocks
= cpu_to_be64(from
->di_nblocks
);
364 to
->di_extsize
= cpu_to_be32(from
->di_extsize
);
365 to
->di_nextents
= cpu_to_be32(from
->di_nextents
);
366 to
->di_anextents
= cpu_to_be16(from
->di_anextents
);
367 to
->di_forkoff
= from
->di_forkoff
;
368 to
->di_aformat
= from
->di_aformat
;
369 to
->di_dmevmask
= cpu_to_be32(from
->di_dmevmask
);
370 to
->di_dmstate
= cpu_to_be16(from
->di_dmstate
);
371 to
->di_flags
= cpu_to_be16(from
->di_flags
);
372 to
->di_gen
= cpu_to_be32(from
->di_gen
);
374 if (from
->di_version
== 3) {
375 to
->di_changecount
= cpu_to_be64(from
->di_changecount
);
376 to
->di_crtime
.t_sec
= cpu_to_be32(from
->di_crtime
.t_sec
);
377 to
->di_crtime
.t_nsec
= cpu_to_be32(from
->di_crtime
.t_nsec
);
378 to
->di_flags2
= cpu_to_be64(from
->di_flags2
);
379 to
->di_cowextsize
= cpu_to_be32(from
->di_cowextsize
);
380 to
->di_ino
= cpu_to_be64(from
->di_ino
);
381 to
->di_lsn
= cpu_to_be64(from
->di_lsn
);
382 memcpy(to
->di_pad2
, from
->di_pad2
, sizeof(to
->di_pad2
));
383 uuid_copy(&to
->di_uuid
, &from
->di_uuid
);
384 to
->di_flushiter
= 0;
386 to
->di_flushiter
= cpu_to_be16(from
->di_flushiter
);
392 struct xfs_mount
*mp
,
394 struct xfs_dinode
*dip
)
401 if (dip
->di_magic
!= cpu_to_be16(XFS_DINODE_MAGIC
))
402 return __this_address
;
404 /* Verify v3 integrity information first */
405 if (dip
->di_version
>= 3) {
406 if (!xfs_sb_version_hascrc(&mp
->m_sb
))
407 return __this_address
;
408 if (!xfs_verify_cksum((char *)dip
, mp
->m_sb
.sb_inodesize
,
410 return __this_address
;
411 if (be64_to_cpu(dip
->di_ino
) != ino
)
412 return __this_address
;
413 if (!uuid_equal(&dip
->di_uuid
, &mp
->m_sb
.sb_meta_uuid
))
414 return __this_address
;
417 /* don't allow invalid i_size */
418 di_size
= be64_to_cpu(dip
->di_size
);
419 if (di_size
& (1ULL << 63))
420 return __this_address
;
422 mode
= be16_to_cpu(dip
->di_mode
);
423 if (mode
&& xfs_mode_to_ftype(mode
) == XFS_DIR3_FT_UNKNOWN
)
424 return __this_address
;
426 /* No zero-length symlinks/dirs. */
427 if ((S_ISLNK(mode
) || S_ISDIR(mode
)) && di_size
== 0)
428 return __this_address
;
430 /* Fork checks carried over from xfs_iformat_fork */
432 be32_to_cpu(dip
->di_nextents
) + be16_to_cpu(dip
->di_anextents
) >
433 be64_to_cpu(dip
->di_nblocks
))
434 return __this_address
;
436 if (mode
&& XFS_DFORK_BOFF(dip
) > mp
->m_sb
.sb_inodesize
)
437 return __this_address
;
439 flags
= be16_to_cpu(dip
->di_flags
);
441 if (mode
&& (flags
& XFS_DIFLAG_REALTIME
) && !mp
->m_rtdev_targp
)
442 return __this_address
;
444 /* Do we have appropriate data fork formats for the mode? */
445 switch (mode
& S_IFMT
) {
450 if (dip
->di_format
!= XFS_DINODE_FMT_DEV
)
451 return __this_address
;
456 switch (dip
->di_format
) {
457 case XFS_DINODE_FMT_LOCAL
:
459 * no local regular files yet
462 return __this_address
;
463 if (di_size
> XFS_DFORK_DSIZE(dip
, mp
))
464 return __this_address
;
465 if (dip
->di_nextents
)
466 return __this_address
;
468 case XFS_DINODE_FMT_EXTENTS
:
469 case XFS_DINODE_FMT_BTREE
:
472 return __this_address
;
476 /* Uninitialized inode ok. */
479 return __this_address
;
482 if (XFS_DFORK_Q(dip
)) {
483 switch (dip
->di_aformat
) {
484 case XFS_DINODE_FMT_LOCAL
:
485 if (dip
->di_anextents
)
486 return __this_address
;
488 case XFS_DINODE_FMT_EXTENTS
:
489 case XFS_DINODE_FMT_BTREE
:
492 return __this_address
;
496 * If there is no fork offset, this may be a freshly-made inode
497 * in a new disk cluster, in which case di_aformat is zeroed.
498 * Otherwise, such an inode must be in EXTENTS format; this goes
499 * for freed inodes as well.
501 switch (dip
->di_aformat
) {
503 case XFS_DINODE_FMT_EXTENTS
:
506 return __this_address
;
508 if (dip
->di_anextents
)
509 return __this_address
;
512 /* only version 3 or greater inodes are extensively verified here */
513 if (dip
->di_version
< 3)
516 flags2
= be64_to_cpu(dip
->di_flags2
);
518 /* don't allow reflink/cowextsize if we don't have reflink */
519 if ((flags2
& (XFS_DIFLAG2_REFLINK
| XFS_DIFLAG2_COWEXTSIZE
)) &&
520 !xfs_sb_version_hasreflink(&mp
->m_sb
))
521 return __this_address
;
523 /* only regular files get reflink */
524 if ((flags2
& XFS_DIFLAG2_REFLINK
) && (mode
& S_IFMT
) != S_IFREG
)
525 return __this_address
;
527 /* don't let reflink and realtime mix */
528 if ((flags2
& XFS_DIFLAG2_REFLINK
) && (flags
& XFS_DIFLAG_REALTIME
))
529 return __this_address
;
531 /* don't let reflink and dax mix */
532 if ((flags2
& XFS_DIFLAG2_REFLINK
) && (flags2
& XFS_DIFLAG2_DAX
))
533 return __this_address
;
540 struct xfs_mount
*mp
,
541 struct xfs_dinode
*dip
)
545 if (dip
->di_version
< 3)
548 ASSERT(xfs_sb_version_hascrc(&mp
->m_sb
));
549 crc
= xfs_start_cksum_update((char *)dip
, mp
->m_sb
.sb_inodesize
,
551 dip
->di_crc
= xfs_end_cksum(crc
);
555 * Read the disk inode attributes into the in-core inode structure.
557 * For version 5 superblocks, if we are initialising a new inode and we are not
558 * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new
559 * inode core with a random generation number. If we are keeping inodes around,
560 * we need to read the inode cluster to get the existing generation number off
561 * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode
562 * format) then log recovery is dependent on the di_flushiter field being
563 * initialised from the current on-disk value and hence we must also read the
579 * Fill in the location information in the in-core inode.
581 error
= xfs_imap(mp
, tp
, ip
->i_ino
, &ip
->i_imap
, iget_flags
);
585 /* shortcut IO on inode allocation if possible */
586 if ((iget_flags
& XFS_IGET_CREATE
) &&
587 xfs_sb_version_hascrc(&mp
->m_sb
) &&
588 !(mp
->m_flags
& XFS_MOUNT_IKEEP
)) {
589 /* initialise the on-disk inode core */
590 memset(&ip
->i_d
, 0, sizeof(ip
->i_d
));
591 VFS_I(ip
)->i_generation
= prandom_u32();
592 ip
->i_d
.di_version
= 3;
597 * Get pointers to the on-disk inode and the buffer containing it.
599 error
= xfs_imap_to_bp(mp
, tp
, &ip
->i_imap
, &dip
, &bp
, 0, iget_flags
);
603 /* even unallocated inodes are verified */
604 fa
= xfs_dinode_verify(mp
, ip
->i_ino
, dip
);
606 xfs_inode_verifier_error(ip
, -EFSCORRUPTED
, "dinode", dip
,
608 error
= -EFSCORRUPTED
;
613 * If the on-disk inode is already linked to a directory
614 * entry, copy all of the inode into the in-core inode.
615 * xfs_iformat_fork() handles copying in the inode format
616 * specific information.
617 * Otherwise, just get the truly permanent information.
620 xfs_inode_from_disk(ip
, dip
);
621 error
= xfs_iformat_fork(ip
, dip
);
624 xfs_alert(mp
, "%s: xfs_iformat() returned error %d",
631 * Partial initialisation of the in-core inode. Just the bits
632 * that xfs_ialloc won't overwrite or relies on being correct.
634 ip
->i_d
.di_version
= dip
->di_version
;
635 VFS_I(ip
)->i_generation
= be32_to_cpu(dip
->di_gen
);
636 ip
->i_d
.di_flushiter
= be16_to_cpu(dip
->di_flushiter
);
639 * Make sure to pull in the mode here as well in
640 * case the inode is released without being used.
641 * This ensures that xfs_inactive() will see that
642 * the inode is already free and not try to mess
643 * with the uninitialized part of it.
645 VFS_I(ip
)->i_mode
= 0;
648 ASSERT(ip
->i_d
.di_version
>= 2);
649 ip
->i_delayed_blks
= 0;
652 * Mark the buffer containing the inode as something to keep
653 * around for a while. This helps to keep recently accessed
654 * meta-data in-core longer.
656 xfs_buf_set_ref(bp
, XFS_INO_REF
);
659 * Use xfs_trans_brelse() to release the buffer containing the on-disk
660 * inode, because it was acquired with xfs_trans_read_buf() in
661 * xfs_imap_to_bp() above. If tp is NULL, this is just a normal
662 * brelse(). If we're within a transaction, then xfs_trans_brelse()
663 * will only release the buffer if it is not dirty within the
664 * transaction. It will be OK to release the buffer in this case,
665 * because inodes on disk are never destroyed and we will be locking the
666 * new in-core inode before putting it in the cache where other
667 * processes can find it. Thus we don't have to worry about the inode
668 * being changed just because we released the buffer.
671 xfs_trans_brelse(tp
, bp
);
676 * Validate di_extsize hint.
678 * The rules are documented at xfs_ioctl_setattr_check_extsize().
679 * These functions must be kept in sync with each other.
682 xfs_inode_validate_extsize(
683 struct xfs_mount
*mp
,
691 uint32_t extsize_bytes
;
692 uint32_t blocksize_bytes
;
694 rt_flag
= (flags
& XFS_DIFLAG_REALTIME
);
695 hint_flag
= (flags
& XFS_DIFLAG_EXTSIZE
);
696 inherit_flag
= (flags
& XFS_DIFLAG_EXTSZINHERIT
);
697 extsize_bytes
= XFS_FSB_TO_B(mp
, extsize
);
700 blocksize_bytes
= mp
->m_sb
.sb_rextsize
<< mp
->m_sb
.sb_blocklog
;
702 blocksize_bytes
= mp
->m_sb
.sb_blocksize
;
704 if ((hint_flag
|| inherit_flag
) && !(S_ISDIR(mode
) || S_ISREG(mode
)))
705 return __this_address
;
707 if (hint_flag
&& !S_ISREG(mode
))
708 return __this_address
;
710 if (inherit_flag
&& !S_ISDIR(mode
))
711 return __this_address
;
713 if ((hint_flag
|| inherit_flag
) && extsize
== 0)
714 return __this_address
;
716 if (!(hint_flag
|| inherit_flag
) && extsize
!= 0)
717 return __this_address
;
719 if (extsize_bytes
% blocksize_bytes
)
720 return __this_address
;
722 if (extsize
> MAXEXTLEN
)
723 return __this_address
;
725 if (!rt_flag
&& extsize
> mp
->m_sb
.sb_agblocks
/ 2)
726 return __this_address
;
732 * Validate di_cowextsize hint.
734 * The rules are documented at xfs_ioctl_setattr_check_cowextsize().
735 * These functions must be kept in sync with each other.
738 xfs_inode_validate_cowextsize(
739 struct xfs_mount
*mp
,
747 uint32_t cowextsize_bytes
;
749 rt_flag
= (flags
& XFS_DIFLAG_REALTIME
);
750 hint_flag
= (flags2
& XFS_DIFLAG2_COWEXTSIZE
);
751 cowextsize_bytes
= XFS_FSB_TO_B(mp
, cowextsize
);
753 if (hint_flag
&& !xfs_sb_version_hasreflink(&mp
->m_sb
))
754 return __this_address
;
756 if (hint_flag
&& !(S_ISDIR(mode
) || S_ISREG(mode
)))
757 return __this_address
;
759 if (hint_flag
&& cowextsize
== 0)
760 return __this_address
;
762 if (!hint_flag
&& cowextsize
!= 0)
763 return __this_address
;
765 if (hint_flag
&& rt_flag
)
766 return __this_address
;
768 if (cowextsize_bytes
% mp
->m_sb
.sb_blocksize
)
769 return __this_address
;
771 if (cowextsize
> MAXEXTLEN
)
772 return __this_address
;
774 if (cowextsize
> mp
->m_sb
.sb_agblocks
/ 2)
775 return __this_address
;