Commit | Line | Data |
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1fd7115e DC |
1 | /* |
2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
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 | |
17 | */ | |
18 | #include "xfs.h" | |
19 | #include "xfs_fs.h" | |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
1fd7115e | 24 | #include "xfs_mount.h" |
1fd7115e DC |
25 | #include "xfs_inode.h" |
26 | #include "xfs_error.h" | |
27 | #include "xfs_cksum.h" | |
28 | #include "xfs_icache.h" | |
239880ef | 29 | #include "xfs_trans.h" |
a4fbe6ab | 30 | #include "xfs_ialloc.h" |
1fd7115e DC |
31 | |
32 | /* | |
33 | * Check that none of the inode's in the buffer have a next | |
34 | * unlinked field of 0. | |
35 | */ | |
36 | #if defined(DEBUG) | |
37 | void | |
38 | xfs_inobp_check( | |
39 | xfs_mount_t *mp, | |
40 | xfs_buf_t *bp) | |
41 | { | |
42 | int i; | |
43 | int j; | |
44 | xfs_dinode_t *dip; | |
45 | ||
46 | j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; | |
47 | ||
48 | for (i = 0; i < j; i++) { | |
88ee2df7 | 49 | dip = xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize); |
1fd7115e DC |
50 | if (!dip->di_next_unlinked) { |
51 | xfs_alert(mp, | |
74ffa796 DC |
52 | "Detected bogus zero next_unlinked field in inode %d buffer 0x%llx.", |
53 | i, (long long)bp->b_bn); | |
1fd7115e DC |
54 | } |
55 | } | |
56 | } | |
57 | #endif | |
58 | ||
d8914002 DC |
59 | /* |
60 | * If we are doing readahead on an inode buffer, we might be in log recovery | |
61 | * reading an inode allocation buffer that hasn't yet been replayed, and hence | |
62 | * has not had the inode cores stamped into it. Hence for readahead, the buffer | |
63 | * may be potentially invalid. | |
64 | * | |
b79f4a1c DC |
65 | * If the readahead buffer is invalid, we need to mark it with an error and |
66 | * clear the DONE status of the buffer so that a followup read will re-read it | |
67 | * from disk. We don't report the error otherwise to avoid warnings during log | |
68 | * recovery and we don't get unnecssary panics on debug kernels. We use EIO here | |
69 | * because all we want to do is say readahead failed; there is no-one to report | |
70 | * the error to, so this will distinguish it from a non-ra verifier failure. | |
7d6a13f0 DC |
71 | * Changes to this readahead error behavour also need to be reflected in |
72 | * xfs_dquot_buf_readahead_verify(). | |
d8914002 | 73 | */ |
1fd7115e DC |
74 | static void |
75 | xfs_inode_buf_verify( | |
d8914002 DC |
76 | struct xfs_buf *bp, |
77 | bool readahead) | |
1fd7115e DC |
78 | { |
79 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
80 | int i; | |
81 | int ni; | |
82 | ||
83 | /* | |
84 | * Validate the magic number and version of every inode in the buffer | |
85 | */ | |
86 | ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock; | |
87 | for (i = 0; i < ni; i++) { | |
88 | int di_ok; | |
89 | xfs_dinode_t *dip; | |
90 | ||
88ee2df7 | 91 | dip = xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog)); |
1fd7115e DC |
92 | di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) && |
93 | XFS_DINODE_GOOD_VERSION(dip->di_version); | |
94 | if (unlikely(XFS_TEST_ERROR(!di_ok, mp, | |
95 | XFS_ERRTAG_ITOBP_INOTOBP, | |
96 | XFS_RANDOM_ITOBP_INOTOBP))) { | |
d8914002 DC |
97 | if (readahead) { |
98 | bp->b_flags &= ~XBF_DONE; | |
b79f4a1c | 99 | xfs_buf_ioerror(bp, -EIO); |
d8914002 DC |
100 | return; |
101 | } | |
102 | ||
2451337d | 103 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf | 104 | xfs_verifier_error(bp); |
1fd7115e | 105 | #ifdef DEBUG |
74ffa796 | 106 | xfs_alert(mp, |
1fd7115e DC |
107 | "bad inode magic/vsn daddr %lld #%d (magic=%x)", |
108 | (unsigned long long)bp->b_bn, i, | |
109 | be16_to_cpu(dip->di_magic)); | |
1fd7115e DC |
110 | #endif |
111 | } | |
112 | } | |
113 | xfs_inobp_check(mp, bp); | |
114 | } | |
115 | ||
116 | ||
117 | static void | |
118 | xfs_inode_buf_read_verify( | |
119 | struct xfs_buf *bp) | |
120 | { | |
d8914002 DC |
121 | xfs_inode_buf_verify(bp, false); |
122 | } | |
123 | ||
124 | static void | |
125 | xfs_inode_buf_readahead_verify( | |
126 | struct xfs_buf *bp) | |
127 | { | |
128 | xfs_inode_buf_verify(bp, true); | |
1fd7115e DC |
129 | } |
130 | ||
131 | static void | |
132 | xfs_inode_buf_write_verify( | |
133 | struct xfs_buf *bp) | |
134 | { | |
d8914002 | 135 | xfs_inode_buf_verify(bp, false); |
1fd7115e DC |
136 | } |
137 | ||
138 | const struct xfs_buf_ops xfs_inode_buf_ops = { | |
233135b7 | 139 | .name = "xfs_inode", |
1fd7115e DC |
140 | .verify_read = xfs_inode_buf_read_verify, |
141 | .verify_write = xfs_inode_buf_write_verify, | |
142 | }; | |
143 | ||
d8914002 | 144 | const struct xfs_buf_ops xfs_inode_buf_ra_ops = { |
233135b7 | 145 | .name = "xxfs_inode_ra", |
d8914002 DC |
146 | .verify_read = xfs_inode_buf_readahead_verify, |
147 | .verify_write = xfs_inode_buf_write_verify, | |
148 | }; | |
149 | ||
1fd7115e DC |
150 | |
151 | /* | |
152 | * This routine is called to map an inode to the buffer containing the on-disk | |
153 | * version of the inode. It returns a pointer to the buffer containing the | |
154 | * on-disk inode in the bpp parameter, and in the dipp parameter it returns a | |
155 | * pointer to the on-disk inode within that buffer. | |
156 | * | |
157 | * If a non-zero error is returned, then the contents of bpp and dipp are | |
158 | * undefined. | |
159 | */ | |
160 | int | |
161 | xfs_imap_to_bp( | |
162 | struct xfs_mount *mp, | |
163 | struct xfs_trans *tp, | |
164 | struct xfs_imap *imap, | |
165 | struct xfs_dinode **dipp, | |
166 | struct xfs_buf **bpp, | |
167 | uint buf_flags, | |
168 | uint iget_flags) | |
169 | { | |
170 | struct xfs_buf *bp; | |
171 | int error; | |
172 | ||
173 | buf_flags |= XBF_UNMAPPED; | |
174 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, | |
175 | (int)imap->im_len, buf_flags, &bp, | |
176 | &xfs_inode_buf_ops); | |
177 | if (error) { | |
2451337d | 178 | if (error == -EAGAIN) { |
1fd7115e DC |
179 | ASSERT(buf_flags & XBF_TRYLOCK); |
180 | return error; | |
181 | } | |
182 | ||
2451337d | 183 | if (error == -EFSCORRUPTED && |
1fd7115e | 184 | (iget_flags & XFS_IGET_UNTRUSTED)) |
2451337d | 185 | return -EINVAL; |
1fd7115e DC |
186 | |
187 | xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.", | |
188 | __func__, error); | |
189 | return error; | |
190 | } | |
191 | ||
192 | *bpp = bp; | |
88ee2df7 | 193 | *dipp = xfs_buf_offset(bp, imap->im_boffset); |
1fd7115e DC |
194 | return 0; |
195 | } | |
196 | ||
638f4416 | 197 | void |
3987848c DC |
198 | xfs_inode_from_disk( |
199 | struct xfs_inode *ip, | |
f8d55aa0 | 200 | struct xfs_dinode *from) |
1fd7115e | 201 | { |
3987848c DC |
202 | struct xfs_icdinode *to = &ip->i_d; |
203 | struct inode *inode = VFS_I(ip); | |
204 | ||
1fd7115e DC |
205 | to->di_mode = be16_to_cpu(from->di_mode); |
206 | to->di_version = from ->di_version; | |
faeb4e47 DC |
207 | |
208 | /* | |
209 | * Convert v1 inodes immediately to v2 inode format as this is the | |
210 | * minimum inode version format we support in the rest of the code. | |
211 | */ | |
212 | if (to->di_version == 1) { | |
213 | to->di_nlink = be16_to_cpu(from->di_onlink); | |
214 | to->di_projid_lo = 0; | |
215 | to->di_projid_hi = 0; | |
216 | to->di_version = 2; | |
217 | } else { | |
218 | to->di_nlink = 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); | |
221 | } | |
222 | ||
1fd7115e | 223 | to->di_format = from->di_format; |
1fd7115e DC |
224 | to->di_uid = be32_to_cpu(from->di_uid); |
225 | to->di_gid = be32_to_cpu(from->di_gid); | |
1fd7115e | 226 | to->di_flushiter = be16_to_cpu(from->di_flushiter); |
3987848c DC |
227 | |
228 | /* | |
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 | |
232 | * on 64 bit systems. | |
233 | */ | |
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 | ||
1fd7115e DC |
241 | to->di_size = be64_to_cpu(from->di_size); |
242 | to->di_nblocks = be64_to_cpu(from->di_nblocks); | |
243 | to->di_extsize = be32_to_cpu(from->di_extsize); | |
244 | to->di_nextents = be32_to_cpu(from->di_nextents); | |
245 | to->di_anextents = be16_to_cpu(from->di_anextents); | |
246 | to->di_forkoff = from->di_forkoff; | |
247 | to->di_aformat = from->di_aformat; | |
248 | to->di_dmevmask = be32_to_cpu(from->di_dmevmask); | |
249 | to->di_dmstate = be16_to_cpu(from->di_dmstate); | |
250 | to->di_flags = be16_to_cpu(from->di_flags); | |
251 | to->di_gen = be32_to_cpu(from->di_gen); | |
252 | ||
253 | if (to->di_version == 3) { | |
254 | to->di_changecount = be64_to_cpu(from->di_changecount); | |
255 | to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec); | |
256 | to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec); | |
257 | to->di_flags2 = be64_to_cpu(from->di_flags2); | |
1fd7115e DC |
258 | } |
259 | } | |
260 | ||
261 | void | |
3987848c DC |
262 | xfs_inode_to_disk( |
263 | struct xfs_inode *ip, | |
93f958f9 DC |
264 | struct xfs_dinode *to, |
265 | xfs_lsn_t lsn) | |
3987848c DC |
266 | { |
267 | struct xfs_icdinode *from = &ip->i_d; | |
268 | struct inode *inode = VFS_I(ip); | |
269 | ||
93f958f9 | 270 | to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC); |
faeb4e47 | 271 | to->di_onlink = 0; |
93f958f9 | 272 | |
3987848c | 273 | to->di_mode = cpu_to_be16(from->di_mode); |
93f958f9 | 274 | to->di_version = from->di_version; |
3987848c | 275 | to->di_format = from->di_format; |
3987848c DC |
276 | to->di_uid = cpu_to_be32(from->di_uid); |
277 | to->di_gid = cpu_to_be32(from->di_gid); | |
278 | to->di_nlink = cpu_to_be32(from->di_nlink); | |
279 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); | |
280 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
3987848c | 281 | |
93f958f9 | 282 | memset(to->di_pad, 0, sizeof(to->di_pad)); |
3987848c DC |
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 | ||
290 | to->di_size = cpu_to_be64(from->di_size); | |
291 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
292 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
293 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
294 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
295 | to->di_forkoff = from->di_forkoff; | |
296 | to->di_aformat = from->di_aformat; | |
297 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
298 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
299 | to->di_flags = cpu_to_be16(from->di_flags); | |
300 | to->di_gen = cpu_to_be32(from->di_gen); | |
301 | ||
302 | if (from->di_version == 3) { | |
303 | to->di_changecount = cpu_to_be64(from->di_changecount); | |
304 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); | |
305 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
306 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
93f958f9 DC |
307 | |
308 | to->di_ino = cpu_to_be64(ip->i_ino); | |
309 | to->di_lsn = cpu_to_be64(lsn); | |
310 | memset(to->di_pad2, 0, sizeof(to->di_pad2)); | |
311 | uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid); | |
3987848c DC |
312 | to->di_flushiter = 0; |
313 | } else { | |
314 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
315 | } | |
316 | } | |
317 | ||
318 | void | |
319 | xfs_log_dinode_to_disk( | |
320 | struct xfs_log_dinode *from, | |
321 | struct xfs_dinode *to) | |
1fd7115e DC |
322 | { |
323 | to->di_magic = cpu_to_be16(from->di_magic); | |
324 | to->di_mode = cpu_to_be16(from->di_mode); | |
faeb4e47 | 325 | to->di_version = from->di_version; |
1fd7115e | 326 | to->di_format = from->di_format; |
faeb4e47 | 327 | to->di_onlink = 0; |
1fd7115e DC |
328 | to->di_uid = cpu_to_be32(from->di_uid); |
329 | to->di_gid = cpu_to_be32(from->di_gid); | |
330 | to->di_nlink = cpu_to_be32(from->di_nlink); | |
331 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); | |
332 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
333 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); | |
3987848c | 334 | |
1fd7115e DC |
335 | to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); |
336 | to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); | |
337 | to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); | |
338 | to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec); | |
339 | to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec); | |
340 | to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec); | |
3987848c | 341 | |
1fd7115e DC |
342 | to->di_size = cpu_to_be64(from->di_size); |
343 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
344 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
345 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
346 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
347 | to->di_forkoff = from->di_forkoff; | |
348 | to->di_aformat = from->di_aformat; | |
349 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
350 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
351 | to->di_flags = cpu_to_be16(from->di_flags); | |
352 | to->di_gen = cpu_to_be32(from->di_gen); | |
353 | ||
354 | if (from->di_version == 3) { | |
355 | to->di_changecount = cpu_to_be64(from->di_changecount); | |
356 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); | |
357 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
358 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
359 | to->di_ino = cpu_to_be64(from->di_ino); | |
360 | to->di_lsn = cpu_to_be64(from->di_lsn); | |
361 | memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2)); | |
362 | uuid_copy(&to->di_uuid, &from->di_uuid); | |
363 | to->di_flushiter = 0; | |
364 | } else { | |
365 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
366 | } | |
367 | } | |
368 | ||
369 | static bool | |
370 | xfs_dinode_verify( | |
371 | struct xfs_mount *mp, | |
372 | struct xfs_inode *ip, | |
373 | struct xfs_dinode *dip) | |
374 | { | |
375 | if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC)) | |
376 | return false; | |
377 | ||
378 | /* only version 3 or greater inodes are extensively verified here */ | |
379 | if (dip->di_version < 3) | |
380 | return true; | |
381 | ||
382 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
383 | return false; | |
384 | if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize, | |
533b81c8 | 385 | XFS_DINODE_CRC_OFF)) |
1fd7115e DC |
386 | return false; |
387 | if (be64_to_cpu(dip->di_ino) != ip->i_ino) | |
388 | return false; | |
ce748eaa | 389 | if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid)) |
1fd7115e DC |
390 | return false; |
391 | return true; | |
392 | } | |
393 | ||
394 | void | |
395 | xfs_dinode_calc_crc( | |
396 | struct xfs_mount *mp, | |
397 | struct xfs_dinode *dip) | |
398 | { | |
399 | __uint32_t crc; | |
400 | ||
401 | if (dip->di_version < 3) | |
402 | return; | |
403 | ||
404 | ASSERT(xfs_sb_version_hascrc(&mp->m_sb)); | |
405 | crc = xfs_start_cksum((char *)dip, mp->m_sb.sb_inodesize, | |
533b81c8 | 406 | XFS_DINODE_CRC_OFF); |
1fd7115e DC |
407 | dip->di_crc = xfs_end_cksum(crc); |
408 | } | |
409 | ||
410 | /* | |
411 | * Read the disk inode attributes into the in-core inode structure. | |
412 | * | |
413 | * For version 5 superblocks, if we are initialising a new inode and we are not | |
414 | * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new | |
415 | * inode core with a random generation number. If we are keeping inodes around, | |
416 | * we need to read the inode cluster to get the existing generation number off | |
417 | * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode | |
418 | * format) then log recovery is dependent on the di_flushiter field being | |
419 | * initialised from the current on-disk value and hence we must also read the | |
420 | * inode off disk. | |
421 | */ | |
422 | int | |
423 | xfs_iread( | |
424 | xfs_mount_t *mp, | |
425 | xfs_trans_t *tp, | |
426 | xfs_inode_t *ip, | |
427 | uint iget_flags) | |
428 | { | |
429 | xfs_buf_t *bp; | |
430 | xfs_dinode_t *dip; | |
431 | int error; | |
432 | ||
433 | /* | |
434 | * Fill in the location information in the in-core inode. | |
435 | */ | |
436 | error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags); | |
437 | if (error) | |
438 | return error; | |
439 | ||
440 | /* shortcut IO on inode allocation if possible */ | |
441 | if ((iget_flags & XFS_IGET_CREATE) && | |
442 | xfs_sb_version_hascrc(&mp->m_sb) && | |
443 | !(mp->m_flags & XFS_MOUNT_IKEEP)) { | |
444 | /* initialise the on-disk inode core */ | |
445 | memset(&ip->i_d, 0, sizeof(ip->i_d)); | |
1fd7115e | 446 | ip->i_d.di_gen = prandom_u32(); |
93f958f9 | 447 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
1fd7115e | 448 | ip->i_d.di_version = 3; |
93f958f9 | 449 | else |
1fd7115e DC |
450 | ip->i_d.di_version = 2; |
451 | return 0; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Get pointers to the on-disk inode and the buffer containing it. | |
456 | */ | |
457 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags); | |
458 | if (error) | |
459 | return error; | |
460 | ||
461 | /* even unallocated inodes are verified */ | |
462 | if (!xfs_dinode_verify(mp, ip, dip)) { | |
463 | xfs_alert(mp, "%s: validation failed for inode %lld failed", | |
464 | __func__, ip->i_ino); | |
465 | ||
466 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, dip); | |
2451337d | 467 | error = -EFSCORRUPTED; |
1fd7115e DC |
468 | goto out_brelse; |
469 | } | |
470 | ||
471 | /* | |
472 | * If the on-disk inode is already linked to a directory | |
473 | * entry, copy all of the inode into the in-core inode. | |
474 | * xfs_iformat_fork() handles copying in the inode format | |
475 | * specific information. | |
476 | * Otherwise, just get the truly permanent information. | |
477 | */ | |
478 | if (dip->di_mode) { | |
3987848c | 479 | xfs_inode_from_disk(ip, dip); |
1fd7115e DC |
480 | error = xfs_iformat_fork(ip, dip); |
481 | if (error) { | |
482 | #ifdef DEBUG | |
483 | xfs_alert(mp, "%s: xfs_iformat() returned error %d", | |
484 | __func__, error); | |
485 | #endif /* DEBUG */ | |
486 | goto out_brelse; | |
487 | } | |
488 | } else { | |
489 | /* | |
490 | * Partial initialisation of the in-core inode. Just the bits | |
491 | * that xfs_ialloc won't overwrite or relies on being correct. | |
492 | */ | |
1fd7115e DC |
493 | ip->i_d.di_version = dip->di_version; |
494 | ip->i_d.di_gen = be32_to_cpu(dip->di_gen); | |
495 | ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter); | |
496 | ||
1fd7115e DC |
497 | /* |
498 | * Make sure to pull in the mode here as well in | |
499 | * case the inode is released without being used. | |
500 | * This ensures that xfs_inactive() will see that | |
501 | * the inode is already free and not try to mess | |
502 | * with the uninitialized part of it. | |
503 | */ | |
504 | ip->i_d.di_mode = 0; | |
505 | } | |
506 | ||
faeb4e47 | 507 | ASSERT(ip->i_d.di_version >= 2); |
1fd7115e DC |
508 | ip->i_delayed_blks = 0; |
509 | ||
510 | /* | |
511 | * Mark the buffer containing the inode as something to keep | |
512 | * around for a while. This helps to keep recently accessed | |
513 | * meta-data in-core longer. | |
514 | */ | |
515 | xfs_buf_set_ref(bp, XFS_INO_REF); | |
516 | ||
517 | /* | |
518 | * Use xfs_trans_brelse() to release the buffer containing the on-disk | |
519 | * inode, because it was acquired with xfs_trans_read_buf() in | |
520 | * xfs_imap_to_bp() above. If tp is NULL, this is just a normal | |
521 | * brelse(). If we're within a transaction, then xfs_trans_brelse() | |
522 | * will only release the buffer if it is not dirty within the | |
523 | * transaction. It will be OK to release the buffer in this case, | |
524 | * because inodes on disk are never destroyed and we will be locking the | |
525 | * new in-core inode before putting it in the cache where other | |
526 | * processes can find it. Thus we don't have to worry about the inode | |
527 | * being changed just because we released the buffer. | |
528 | */ | |
529 | out_brelse: | |
530 | xfs_trans_brelse(tp, bp); | |
531 | return error; | |
532 | } |