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
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_error.h"
28 #include "xfs_cksum.h"
29 #include "xfs_icache.h"
30 #include "xfs_trans.h"
31 #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 * If we are doing readahead on an inode buffer, we might be in log recovery
62 * reading an inode allocation buffer that hasn't yet been replayed, and hence
63 * has not had the inode cores stamped into it. Hence for readahead, the buffer
64 * may be potentially invalid.
66 * If the readahead buffer is invalid, we need to mark it with an error and
67 * clear the DONE status of the buffer so that a followup read will re-read it
68 * from disk. We don't report the error otherwise to avoid warnings during log
69 * recovery and we don't get unnecssary panics on debug kernels. We use EIO here
70 * because all we want to do is say readahead failed; there is no-one to report
71 * the error to, so this will distinguish it from a non-ra verifier failure.
72 * Changes to this readahead error behavour also need to be reflected in
73 * xfs_dquot_buf_readahead_verify().
80 struct xfs_mount
*mp
= bp
->b_target
->bt_mount
;
85 * Validate the magic number and version of every inode in the buffer
87 ni
= XFS_BB_TO_FSB(mp
, bp
->b_length
) * mp
->m_sb
.sb_inopblock
;
88 for (i
= 0; i
< ni
; i
++) {
92 dip
= xfs_buf_offset(bp
, (i
<< mp
->m_sb
.sb_inodelog
));
93 di_ok
= dip
->di_magic
== cpu_to_be16(XFS_DINODE_MAGIC
) &&
94 XFS_DINODE_GOOD_VERSION(dip
->di_version
);
95 if (unlikely(XFS_TEST_ERROR(!di_ok
, mp
,
96 XFS_ERRTAG_ITOBP_INOTOBP
,
97 XFS_RANDOM_ITOBP_INOTOBP
))) {
99 bp
->b_flags
&= ~XBF_DONE
;
100 xfs_buf_ioerror(bp
, -EIO
);
104 xfs_buf_ioerror(bp
, -EFSCORRUPTED
);
105 xfs_verifier_error(bp
);
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
));
114 xfs_inobp_check(mp
, bp
);
119 xfs_inode_buf_read_verify(
122 xfs_inode_buf_verify(bp
, false);
126 xfs_inode_buf_readahead_verify(
129 xfs_inode_buf_verify(bp
, true);
133 xfs_inode_buf_write_verify(
136 xfs_inode_buf_verify(bp
, false);
139 const struct xfs_buf_ops xfs_inode_buf_ops
= {
141 .verify_read
= xfs_inode_buf_read_verify
,
142 .verify_write
= xfs_inode_buf_write_verify
,
145 const struct xfs_buf_ops xfs_inode_buf_ra_ops
= {
146 .name
= "xxfs_inode_ra",
147 .verify_read
= xfs_inode_buf_readahead_verify
,
148 .verify_write
= xfs_inode_buf_write_verify
,
153 * This routine is called to map an inode to the buffer containing the on-disk
154 * version of the inode. It returns a pointer to the buffer containing the
155 * on-disk inode in the bpp parameter, and in the dipp parameter it returns a
156 * pointer to the on-disk inode within that buffer.
158 * If a non-zero error is returned, then the contents of bpp and dipp are
163 struct xfs_mount
*mp
,
164 struct xfs_trans
*tp
,
165 struct xfs_imap
*imap
,
166 struct xfs_dinode
**dipp
,
167 struct xfs_buf
**bpp
,
174 buf_flags
|= XBF_UNMAPPED
;
175 error
= xfs_trans_read_buf(mp
, tp
, mp
->m_ddev_targp
, imap
->im_blkno
,
176 (int)imap
->im_len
, buf_flags
, &bp
,
179 if (error
== -EAGAIN
) {
180 ASSERT(buf_flags
& XBF_TRYLOCK
);
184 if (error
== -EFSCORRUPTED
&&
185 (iget_flags
& XFS_IGET_UNTRUSTED
))
188 xfs_warn(mp
, "%s: xfs_trans_read_buf() returned error %d.",
194 *dipp
= xfs_buf_offset(bp
, imap
->im_boffset
);
200 struct xfs_inode
*ip
,
201 struct xfs_dinode
*from
)
203 struct xfs_icdinode
*to
= &ip
->i_d
;
204 struct inode
*inode
= VFS_I(ip
);
208 * Convert v1 inodes immediately to v2 inode format as this is the
209 * minimum inode version format we support in the rest of the code.
211 to
->di_version
= from
->di_version
;
212 if (to
->di_version
== 1) {
213 set_nlink(inode
, be16_to_cpu(from
->di_onlink
));
214 to
->di_projid_lo
= 0;
215 to
->di_projid_hi
= 0;
218 set_nlink(inode
, be32_to_cpu(from
->di_nlink
));
219 to
->di_projid_lo
= be16_to_cpu(from
->di_projid_lo
);
220 to
->di_projid_hi
= be16_to_cpu(from
->di_projid_hi
);
223 to
->di_format
= from
->di_format
;
224 to
->di_uid
= be32_to_cpu(from
->di_uid
);
225 to
->di_gid
= be32_to_cpu(from
->di_gid
);
226 to
->di_flushiter
= be16_to_cpu(from
->di_flushiter
);
229 * Time is signed, so need to convert to signed 32 bit before
230 * storing in inode timestamp which may be 64 bit. Otherwise
231 * a time before epoch is converted to a time long after epoch
234 inode
->i_atime
.tv_sec
= (int)be32_to_cpu(from
->di_atime
.t_sec
);
235 inode
->i_atime
.tv_nsec
= (int)be32_to_cpu(from
->di_atime
.t_nsec
);
236 inode
->i_mtime
.tv_sec
= (int)be32_to_cpu(from
->di_mtime
.t_sec
);
237 inode
->i_mtime
.tv_nsec
= (int)be32_to_cpu(from
->di_mtime
.t_nsec
);
238 inode
->i_ctime
.tv_sec
= (int)be32_to_cpu(from
->di_ctime
.t_sec
);
239 inode
->i_ctime
.tv_nsec
= (int)be32_to_cpu(from
->di_ctime
.t_nsec
);
240 inode
->i_generation
= be32_to_cpu(from
->di_gen
);
241 inode
->i_mode
= be16_to_cpu(from
->di_mode
);
243 to
->di_size
= be64_to_cpu(from
->di_size
);
244 to
->di_nblocks
= be64_to_cpu(from
->di_nblocks
);
245 to
->di_extsize
= be32_to_cpu(from
->di_extsize
);
246 to
->di_nextents
= be32_to_cpu(from
->di_nextents
);
247 to
->di_anextents
= be16_to_cpu(from
->di_anextents
);
248 to
->di_forkoff
= from
->di_forkoff
;
249 to
->di_aformat
= from
->di_aformat
;
250 to
->di_dmevmask
= be32_to_cpu(from
->di_dmevmask
);
251 to
->di_dmstate
= be16_to_cpu(from
->di_dmstate
);
252 to
->di_flags
= be16_to_cpu(from
->di_flags
);
254 if (to
->di_version
== 3) {
255 inode
->i_version
= be64_to_cpu(from
->di_changecount
);
256 to
->di_crtime
.t_sec
= be32_to_cpu(from
->di_crtime
.t_sec
);
257 to
->di_crtime
.t_nsec
= be32_to_cpu(from
->di_crtime
.t_nsec
);
258 to
->di_flags2
= be64_to_cpu(from
->di_flags2
);
259 to
->di_cowextsize
= be32_to_cpu(from
->di_cowextsize
);
265 struct xfs_inode
*ip
,
266 struct xfs_dinode
*to
,
269 struct xfs_icdinode
*from
= &ip
->i_d
;
270 struct inode
*inode
= VFS_I(ip
);
272 to
->di_magic
= cpu_to_be16(XFS_DINODE_MAGIC
);
275 to
->di_version
= from
->di_version
;
276 to
->di_format
= from
->di_format
;
277 to
->di_uid
= cpu_to_be32(from
->di_uid
);
278 to
->di_gid
= cpu_to_be32(from
->di_gid
);
279 to
->di_projid_lo
= cpu_to_be16(from
->di_projid_lo
);
280 to
->di_projid_hi
= cpu_to_be16(from
->di_projid_hi
);
282 memset(to
->di_pad
, 0, sizeof(to
->di_pad
));
283 to
->di_atime
.t_sec
= cpu_to_be32(inode
->i_atime
.tv_sec
);
284 to
->di_atime
.t_nsec
= cpu_to_be32(inode
->i_atime
.tv_nsec
);
285 to
->di_mtime
.t_sec
= cpu_to_be32(inode
->i_mtime
.tv_sec
);
286 to
->di_mtime
.t_nsec
= cpu_to_be32(inode
->i_mtime
.tv_nsec
);
287 to
->di_ctime
.t_sec
= cpu_to_be32(inode
->i_ctime
.tv_sec
);
288 to
->di_ctime
.t_nsec
= cpu_to_be32(inode
->i_ctime
.tv_nsec
);
289 to
->di_nlink
= cpu_to_be32(inode
->i_nlink
);
290 to
->di_gen
= cpu_to_be32(inode
->i_generation
);
291 to
->di_mode
= cpu_to_be16(inode
->i_mode
);
293 to
->di_size
= cpu_to_be64(from
->di_size
);
294 to
->di_nblocks
= cpu_to_be64(from
->di_nblocks
);
295 to
->di_extsize
= cpu_to_be32(from
->di_extsize
);
296 to
->di_nextents
= cpu_to_be32(from
->di_nextents
);
297 to
->di_anextents
= cpu_to_be16(from
->di_anextents
);
298 to
->di_forkoff
= from
->di_forkoff
;
299 to
->di_aformat
= from
->di_aformat
;
300 to
->di_dmevmask
= cpu_to_be32(from
->di_dmevmask
);
301 to
->di_dmstate
= cpu_to_be16(from
->di_dmstate
);
302 to
->di_flags
= cpu_to_be16(from
->di_flags
);
304 if (from
->di_version
== 3) {
305 to
->di_changecount
= cpu_to_be64(inode
->i_version
);
306 to
->di_crtime
.t_sec
= cpu_to_be32(from
->di_crtime
.t_sec
);
307 to
->di_crtime
.t_nsec
= cpu_to_be32(from
->di_crtime
.t_nsec
);
308 to
->di_flags2
= cpu_to_be64(from
->di_flags2
);
309 to
->di_cowextsize
= cpu_to_be32(from
->di_cowextsize
);
310 to
->di_ino
= cpu_to_be64(ip
->i_ino
);
311 to
->di_lsn
= cpu_to_be64(lsn
);
312 memset(to
->di_pad2
, 0, sizeof(to
->di_pad2
));
313 uuid_copy(&to
->di_uuid
, &ip
->i_mount
->m_sb
.sb_meta_uuid
);
314 to
->di_flushiter
= 0;
316 to
->di_flushiter
= cpu_to_be16(from
->di_flushiter
);
321 xfs_log_dinode_to_disk(
322 struct xfs_log_dinode
*from
,
323 struct xfs_dinode
*to
)
325 to
->di_magic
= cpu_to_be16(from
->di_magic
);
326 to
->di_mode
= cpu_to_be16(from
->di_mode
);
327 to
->di_version
= from
->di_version
;
328 to
->di_format
= from
->di_format
;
330 to
->di_uid
= cpu_to_be32(from
->di_uid
);
331 to
->di_gid
= cpu_to_be32(from
->di_gid
);
332 to
->di_nlink
= cpu_to_be32(from
->di_nlink
);
333 to
->di_projid_lo
= cpu_to_be16(from
->di_projid_lo
);
334 to
->di_projid_hi
= cpu_to_be16(from
->di_projid_hi
);
335 memcpy(to
->di_pad
, from
->di_pad
, sizeof(to
->di_pad
));
337 to
->di_atime
.t_sec
= cpu_to_be32(from
->di_atime
.t_sec
);
338 to
->di_atime
.t_nsec
= cpu_to_be32(from
->di_atime
.t_nsec
);
339 to
->di_mtime
.t_sec
= cpu_to_be32(from
->di_mtime
.t_sec
);
340 to
->di_mtime
.t_nsec
= cpu_to_be32(from
->di_mtime
.t_nsec
);
341 to
->di_ctime
.t_sec
= cpu_to_be32(from
->di_ctime
.t_sec
);
342 to
->di_ctime
.t_nsec
= cpu_to_be32(from
->di_ctime
.t_nsec
);
344 to
->di_size
= cpu_to_be64(from
->di_size
);
345 to
->di_nblocks
= cpu_to_be64(from
->di_nblocks
);
346 to
->di_extsize
= cpu_to_be32(from
->di_extsize
);
347 to
->di_nextents
= cpu_to_be32(from
->di_nextents
);
348 to
->di_anextents
= cpu_to_be16(from
->di_anextents
);
349 to
->di_forkoff
= from
->di_forkoff
;
350 to
->di_aformat
= from
->di_aformat
;
351 to
->di_dmevmask
= cpu_to_be32(from
->di_dmevmask
);
352 to
->di_dmstate
= cpu_to_be16(from
->di_dmstate
);
353 to
->di_flags
= cpu_to_be16(from
->di_flags
);
354 to
->di_gen
= cpu_to_be32(from
->di_gen
);
356 if (from
->di_version
== 3) {
357 to
->di_changecount
= cpu_to_be64(from
->di_changecount
);
358 to
->di_crtime
.t_sec
= cpu_to_be32(from
->di_crtime
.t_sec
);
359 to
->di_crtime
.t_nsec
= cpu_to_be32(from
->di_crtime
.t_nsec
);
360 to
->di_flags2
= cpu_to_be64(from
->di_flags2
);
361 to
->di_cowextsize
= cpu_to_be32(from
->di_cowextsize
);
362 to
->di_ino
= cpu_to_be64(from
->di_ino
);
363 to
->di_lsn
= cpu_to_be64(from
->di_lsn
);
364 memcpy(to
->di_pad2
, from
->di_pad2
, sizeof(to
->di_pad2
));
365 uuid_copy(&to
->di_uuid
, &from
->di_uuid
);
366 to
->di_flushiter
= 0;
368 to
->di_flushiter
= cpu_to_be16(from
->di_flushiter
);
374 struct xfs_mount
*mp
,
375 struct xfs_inode
*ip
,
376 struct xfs_dinode
*dip
)
381 if (dip
->di_magic
!= cpu_to_be16(XFS_DINODE_MAGIC
))
384 /* only version 3 or greater inodes are extensively verified here */
385 if (dip
->di_version
< 3)
388 if (!xfs_sb_version_hascrc(&mp
->m_sb
))
390 if (!xfs_verify_cksum((char *)dip
, mp
->m_sb
.sb_inodesize
,
393 if (be64_to_cpu(dip
->di_ino
) != ip
->i_ino
)
395 if (!uuid_equal(&dip
->di_uuid
, &mp
->m_sb
.sb_meta_uuid
))
398 flags
= be16_to_cpu(dip
->di_flags
);
399 flags2
= be64_to_cpu(dip
->di_flags2
);
401 /* don't allow reflink/cowextsize if we don't have reflink */
402 if ((flags2
& (XFS_DIFLAG2_REFLINK
| XFS_DIFLAG2_COWEXTSIZE
)) &&
403 !xfs_sb_version_hasreflink(&mp
->m_sb
))
406 /* don't let reflink and realtime mix */
407 if ((flags2
& XFS_DIFLAG2_REFLINK
) && (flags
& XFS_DIFLAG_REALTIME
))
410 /* don't let reflink and dax mix */
411 if ((flags2
& XFS_DIFLAG2_REFLINK
) && (flags2
& XFS_DIFLAG2_DAX
))
419 struct xfs_mount
*mp
,
420 struct xfs_dinode
*dip
)
424 if (dip
->di_version
< 3)
427 ASSERT(xfs_sb_version_hascrc(&mp
->m_sb
));
428 crc
= xfs_start_cksum((char *)dip
, mp
->m_sb
.sb_inodesize
,
430 dip
->di_crc
= xfs_end_cksum(crc
);
434 * Read the disk inode attributes into the in-core inode structure.
436 * For version 5 superblocks, if we are initialising a new inode and we are not
437 * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new
438 * inode core with a random generation number. If we are keeping inodes around,
439 * we need to read the inode cluster to get the existing generation number off
440 * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode
441 * format) then log recovery is dependent on the di_flushiter field being
442 * initialised from the current on-disk value and hence we must also read the
457 * Fill in the location information in the in-core inode.
459 error
= xfs_imap(mp
, tp
, ip
->i_ino
, &ip
->i_imap
, iget_flags
);
463 /* shortcut IO on inode allocation if possible */
464 if ((iget_flags
& XFS_IGET_CREATE
) &&
465 xfs_sb_version_hascrc(&mp
->m_sb
) &&
466 !(mp
->m_flags
& XFS_MOUNT_IKEEP
)) {
467 /* initialise the on-disk inode core */
468 memset(&ip
->i_d
, 0, sizeof(ip
->i_d
));
469 VFS_I(ip
)->i_generation
= prandom_u32();
470 if (xfs_sb_version_hascrc(&mp
->m_sb
))
471 ip
->i_d
.di_version
= 3;
473 ip
->i_d
.di_version
= 2;
478 * Get pointers to the on-disk inode and the buffer containing it.
480 error
= xfs_imap_to_bp(mp
, tp
, &ip
->i_imap
, &dip
, &bp
, 0, iget_flags
);
484 /* even unallocated inodes are verified */
485 if (!xfs_dinode_verify(mp
, ip
, dip
)) {
486 xfs_alert(mp
, "%s: validation failed for inode %lld failed",
487 __func__
, ip
->i_ino
);
489 XFS_CORRUPTION_ERROR(__func__
, XFS_ERRLEVEL_LOW
, mp
, dip
);
490 error
= -EFSCORRUPTED
;
495 * If the on-disk inode is already linked to a directory
496 * entry, copy all of the inode into the in-core inode.
497 * xfs_iformat_fork() handles copying in the inode format
498 * specific information.
499 * Otherwise, just get the truly permanent information.
502 xfs_inode_from_disk(ip
, dip
);
503 error
= xfs_iformat_fork(ip
, dip
);
506 xfs_alert(mp
, "%s: xfs_iformat() returned error %d",
513 * Partial initialisation of the in-core inode. Just the bits
514 * that xfs_ialloc won't overwrite or relies on being correct.
516 ip
->i_d
.di_version
= dip
->di_version
;
517 VFS_I(ip
)->i_generation
= be32_to_cpu(dip
->di_gen
);
518 ip
->i_d
.di_flushiter
= be16_to_cpu(dip
->di_flushiter
);
521 * Make sure to pull in the mode here as well in
522 * case the inode is released without being used.
523 * This ensures that xfs_inactive() will see that
524 * the inode is already free and not try to mess
525 * with the uninitialized part of it.
527 VFS_I(ip
)->i_mode
= 0;
530 ASSERT(ip
->i_d
.di_version
>= 2);
531 ip
->i_delayed_blks
= 0;
534 * Mark the buffer containing the inode as something to keep
535 * around for a while. This helps to keep recently accessed
536 * meta-data in-core longer.
538 xfs_buf_set_ref(bp
, XFS_INO_REF
);
541 * Use xfs_trans_brelse() to release the buffer containing the on-disk
542 * inode, because it was acquired with xfs_trans_read_buf() in
543 * xfs_imap_to_bp() above. If tp is NULL, this is just a normal
544 * brelse(). If we're within a transaction, then xfs_trans_brelse()
545 * will only release the buffer if it is not dirty within the
546 * transaction. It will be OK to release the buffer in this case,
547 * because inodes on disk are never destroyed and we will be locking the
548 * new in-core inode before putting it in the cache where other
549 * processes can find it. Thus we don't have to worry about the inode
550 * being changed just because we released the buffer.
553 xfs_trans_brelse(tp
, bp
);