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Commit | Line | Data |
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2bd0ea18 | 1 | /* |
5e656dbb | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
da23017d | 3 | * All Rights Reserved. |
5000d01d | 4 | * |
da23017d NS |
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 | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
5000d01d | 8 | * |
da23017d NS |
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. | |
5000d01d | 13 | * |
da23017d NS |
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 | |
2bd0ea18 | 17 | */ |
9c799827 | 18 | #include "libxfs_priv.h" |
b626fb59 DC |
19 | #include "xfs_fs.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" | |
f944d3d0 | 25 | #include "xfs_defer.h" |
b626fb59 | 26 | #include "xfs_inode.h" |
56d3fc2b | 27 | #include "xfs_errortag.h" |
b626fb59 DC |
28 | #include "xfs_cksum.h" |
29 | #include "xfs_trans.h" | |
30 | #include "xfs_ialloc.h" | |
0962b5b3 | 31 | #include "xfs_dir2.h" |
2bd0ea18 | 32 | |
5e656dbb BN |
33 | /* |
34 | * Check that none of the inode's in the buffer have a next | |
35 | * unlinked field of 0. | |
36 | */ | |
37 | #if defined(DEBUG) | |
2bd0ea18 NS |
38 | void |
39 | xfs_inobp_check( | |
40 | xfs_mount_t *mp, | |
41 | xfs_buf_t *bp) | |
42 | { | |
43 | int i; | |
44 | int j; | |
45 | xfs_dinode_t *dip; | |
46 | ||
47 | j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog; | |
48 | ||
49 | for (i = 0; i < j; i++) { | |
92acb899 | 50 | dip = xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize); |
46eca962 | 51 | if (!dip->di_next_unlinked) { |
a2ceac1f | 52 | xfs_alert(mp, |
ea6a00d4 DC |
53 | "Detected bogus zero next_unlinked field in inode %d buffer 0x%llx.", |
54 | i, (long long)bp->b_bn); | |
2bd0ea18 NS |
55 | } |
56 | } | |
57 | } | |
58 | #endif | |
59 | ||
307ae950 RW |
60 | bool |
61 | xfs_dinode_good_version( | |
62 | struct xfs_mount *mp, | |
63 | __u8 version) | |
64 | { | |
65 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
66 | return version == 3; | |
67 | ||
68 | return version == 1 || version == 2; | |
69 | } | |
70 | ||
f85fc622 DC |
71 | /* |
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. | |
76 | * | |
736e1cf6 DC |
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. | |
6daba42a DC |
83 | * Changes to this readahead error behavour also need to be reflected in |
84 | * xfs_dquot_buf_readahead_verify(). | |
f85fc622 | 85 | */ |
a2ceac1f DC |
86 | static void |
87 | xfs_inode_buf_verify( | |
f85fc622 DC |
88 | struct xfs_buf *bp, |
89 | bool readahead) | |
5e656dbb | 90 | { |
a2ceac1f | 91 | struct xfs_mount *mp = bp->b_target->bt_mount; |
5e656dbb BN |
92 | int i; |
93 | int ni; | |
5e656dbb BN |
94 | |
95 | /* | |
96 | * Validate the magic number and version of every inode in the buffer | |
5e656dbb | 97 | */ |
a2ceac1f | 98 | ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock; |
5e656dbb BN |
99 | for (i = 0; i < ni; i++) { |
100 | int di_ok; | |
101 | xfs_dinode_t *dip; | |
102 | ||
92acb899 | 103 | dip = xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog)); |
a2ceac1f | 104 | di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) && |
307ae950 | 105 | xfs_dinode_good_version(mp, dip->di_version); |
5e656dbb | 106 | if (unlikely(XFS_TEST_ERROR(!di_ok, mp, |
e2a190dd | 107 | XFS_ERRTAG_ITOBP_INOTOBP))) { |
f85fc622 DC |
108 | if (readahead) { |
109 | bp->b_flags &= ~XBF_DONE; | |
736e1cf6 | 110 | xfs_buf_ioerror(bp, -EIO); |
f85fc622 DC |
111 | return; |
112 | } | |
113 | ||
12b53197 | 114 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
45922933 | 115 | xfs_verifier_error(bp); |
5e656dbb | 116 | #ifdef DEBUG |
ea6a00d4 | 117 | xfs_alert(mp, |
a2ceac1f DC |
118 | "bad inode magic/vsn daddr %lld #%d (magic=%x)", |
119 | (unsigned long long)bp->b_bn, i, | |
56b2de80 | 120 | be16_to_cpu(dip->di_magic)); |
5e656dbb | 121 | #endif |
5e656dbb BN |
122 | } |
123 | } | |
5e656dbb | 124 | xfs_inobp_check(mp, bp); |
a2ceac1f | 125 | } |
5e656dbb | 126 | |
e6d77a21 | 127 | |
a2ceac1f DC |
128 | static void |
129 | xfs_inode_buf_read_verify( | |
130 | struct xfs_buf *bp) | |
131 | { | |
f85fc622 DC |
132 | xfs_inode_buf_verify(bp, false); |
133 | } | |
134 | ||
135 | static void | |
136 | xfs_inode_buf_readahead_verify( | |
137 | struct xfs_buf *bp) | |
138 | { | |
139 | xfs_inode_buf_verify(bp, true); | |
5e656dbb | 140 | } |
2bd0ea18 | 141 | |
a2ceac1f DC |
142 | static void |
143 | xfs_inode_buf_write_verify( | |
144 | struct xfs_buf *bp) | |
56b2de80 | 145 | { |
f85fc622 | 146 | xfs_inode_buf_verify(bp, false); |
56b2de80 DC |
147 | } |
148 | ||
a2ceac1f | 149 | const struct xfs_buf_ops xfs_inode_buf_ops = { |
a3fac935 | 150 | .name = "xfs_inode", |
a2ceac1f DC |
151 | .verify_read = xfs_inode_buf_read_verify, |
152 | .verify_write = xfs_inode_buf_write_verify, | |
153 | }; | |
154 | ||
f85fc622 | 155 | const struct xfs_buf_ops xfs_inode_buf_ra_ops = { |
a3fac935 | 156 | .name = "xxfs_inode_ra", |
f85fc622 DC |
157 | .verify_read = xfs_inode_buf_readahead_verify, |
158 | .verify_write = xfs_inode_buf_write_verify, | |
159 | }; | |
160 | ||
161 | ||
2bd0ea18 | 162 | /* |
a2ceac1f DC |
163 | * This routine is called to map an inode to the buffer containing the on-disk |
164 | * version of the inode. It returns a pointer to the buffer containing the | |
165 | * on-disk inode in the bpp parameter, and in the dipp parameter it returns a | |
166 | * pointer to the on-disk inode within that buffer. | |
2bd0ea18 | 167 | * |
a2ceac1f DC |
168 | * If a non-zero error is returned, then the contents of bpp and dipp are |
169 | * undefined. | |
2bd0ea18 NS |
170 | */ |
171 | int | |
a2ceac1f DC |
172 | xfs_imap_to_bp( |
173 | struct xfs_mount *mp, | |
174 | struct xfs_trans *tp, | |
175 | struct xfs_imap *imap, | |
176 | struct xfs_dinode **dipp, | |
177 | struct xfs_buf **bpp, | |
178 | uint buf_flags, | |
179 | uint iget_flags) | |
2bd0ea18 | 180 | { |
a2ceac1f DC |
181 | struct xfs_buf *bp; |
182 | int error; | |
2bd0ea18 | 183 | |
a2ceac1f DC |
184 | buf_flags |= XBF_UNMAPPED; |
185 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, | |
186 | (int)imap->im_len, buf_flags, &bp, | |
187 | &xfs_inode_buf_ops); | |
188 | if (error) { | |
12b53197 | 189 | if (error == -EAGAIN) { |
a2ceac1f DC |
190 | ASSERT(buf_flags & XBF_TRYLOCK); |
191 | return error; | |
192 | } | |
2bd0ea18 | 193 | |
12b53197 | 194 | if (error == -EFSCORRUPTED && |
a2ceac1f | 195 | (iget_flags & XFS_IGET_UNTRUSTED)) |
12b53197 | 196 | return -EINVAL; |
2bd0ea18 | 197 | |
a2ceac1f DC |
198 | xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.", |
199 | __func__, error); | |
200 | return error; | |
2bd0ea18 | 201 | } |
2bd0ea18 | 202 | |
2bd0ea18 | 203 | *bpp = bp; |
92acb899 | 204 | *dipp = xfs_buf_offset(bp, imap->im_boffset); |
2bd0ea18 NS |
205 | return 0; |
206 | } | |
207 | ||
5000d01d | 208 | void |
1bc6cbe3 DC |
209 | xfs_inode_from_disk( |
210 | struct xfs_inode *ip, | |
138659f1 | 211 | struct xfs_dinode *from) |
2bd0ea18 | 212 | { |
1bc6cbe3 DC |
213 | struct xfs_icdinode *to = &ip->i_d; |
214 | struct inode *inode = VFS_I(ip); | |
215 | ||
f089fc42 DC |
216 | |
217 | /* | |
218 | * Convert v1 inodes immediately to v2 inode format as this is the | |
219 | * minimum inode version format we support in the rest of the code. | |
220 | */ | |
e37bf53c | 221 | to->di_version = from->di_version; |
f089fc42 | 222 | if (to->di_version == 1) { |
bcbe04c1 | 223 | set_nlink(inode, be16_to_cpu(from->di_onlink)); |
f089fc42 DC |
224 | to->di_projid_lo = 0; |
225 | to->di_projid_hi = 0; | |
226 | to->di_version = 2; | |
227 | } else { | |
bcbe04c1 | 228 | set_nlink(inode, be32_to_cpu(from->di_nlink)); |
f089fc42 DC |
229 | to->di_projid_lo = be16_to_cpu(from->di_projid_lo); |
230 | to->di_projid_hi = be16_to_cpu(from->di_projid_hi); | |
231 | } | |
232 | ||
5e656dbb | 233 | to->di_format = from->di_format; |
5e656dbb BN |
234 | to->di_uid = be32_to_cpu(from->di_uid); |
235 | to->di_gid = be32_to_cpu(from->di_gid); | |
5e656dbb | 236 | to->di_flushiter = be16_to_cpu(from->di_flushiter); |
1bc6cbe3 DC |
237 | |
238 | /* | |
239 | * Time is signed, so need to convert to signed 32 bit before | |
240 | * storing in inode timestamp which may be 64 bit. Otherwise | |
241 | * a time before epoch is converted to a time long after epoch | |
242 | * on 64 bit systems. | |
243 | */ | |
244 | inode->i_atime.tv_sec = (int)be32_to_cpu(from->di_atime.t_sec); | |
245 | inode->i_atime.tv_nsec = (int)be32_to_cpu(from->di_atime.t_nsec); | |
246 | inode->i_mtime.tv_sec = (int)be32_to_cpu(from->di_mtime.t_sec); | |
247 | inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec); | |
248 | inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec); | |
249 | inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec); | |
6652c253 | 250 | inode->i_generation = be32_to_cpu(from->di_gen); |
e37bf53c | 251 | inode->i_mode = be16_to_cpu(from->di_mode); |
1bc6cbe3 | 252 | |
5e656dbb BN |
253 | to->di_size = be64_to_cpu(from->di_size); |
254 | to->di_nblocks = be64_to_cpu(from->di_nblocks); | |
255 | to->di_extsize = be32_to_cpu(from->di_extsize); | |
256 | to->di_nextents = be32_to_cpu(from->di_nextents); | |
257 | to->di_anextents = be16_to_cpu(from->di_anextents); | |
258 | to->di_forkoff = from->di_forkoff; | |
259 | to->di_aformat = from->di_aformat; | |
260 | to->di_dmevmask = be32_to_cpu(from->di_dmevmask); | |
261 | to->di_dmstate = be16_to_cpu(from->di_dmstate); | |
262 | to->di_flags = be16_to_cpu(from->di_flags); | |
41ce5f36 DC |
263 | |
264 | if (to->di_version == 3) { | |
9abcc5cd | 265 | inode->i_version = be64_to_cpu(from->di_changecount); |
41ce5f36 DC |
266 | to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec); |
267 | to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec); | |
268 | to->di_flags2 = be64_to_cpu(from->di_flags2); | |
10460994 | 269 | to->di_cowextsize = be32_to_cpu(from->di_cowextsize); |
41ce5f36 | 270 | } |
5e656dbb BN |
271 | } |
272 | ||
273 | void | |
1bc6cbe3 DC |
274 | xfs_inode_to_disk( |
275 | struct xfs_inode *ip, | |
db17aebe DC |
276 | struct xfs_dinode *to, |
277 | xfs_lsn_t lsn) | |
1bc6cbe3 DC |
278 | { |
279 | struct xfs_icdinode *from = &ip->i_d; | |
280 | struct inode *inode = VFS_I(ip); | |
281 | ||
db17aebe | 282 | to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC); |
f089fc42 | 283 | to->di_onlink = 0; |
db17aebe | 284 | |
db17aebe | 285 | to->di_version = from->di_version; |
1bc6cbe3 | 286 | to->di_format = from->di_format; |
1bc6cbe3 DC |
287 | to->di_uid = cpu_to_be32(from->di_uid); |
288 | to->di_gid = cpu_to_be32(from->di_gid); | |
1bc6cbe3 DC |
289 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); |
290 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
1bc6cbe3 | 291 | |
db17aebe | 292 | memset(to->di_pad, 0, sizeof(to->di_pad)); |
1bc6cbe3 DC |
293 | to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec); |
294 | to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec); | |
295 | to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec); | |
296 | to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec); | |
297 | to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec); | |
298 | to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec); | |
bcbe04c1 | 299 | to->di_nlink = cpu_to_be32(inode->i_nlink); |
6652c253 | 300 | to->di_gen = cpu_to_be32(inode->i_generation); |
e37bf53c | 301 | to->di_mode = cpu_to_be16(inode->i_mode); |
1bc6cbe3 DC |
302 | |
303 | to->di_size = cpu_to_be64(from->di_size); | |
304 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
305 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
306 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
307 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
308 | to->di_forkoff = from->di_forkoff; | |
309 | to->di_aformat = from->di_aformat; | |
310 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
311 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
312 | to->di_flags = cpu_to_be16(from->di_flags); | |
1bc6cbe3 DC |
313 | |
314 | if (from->di_version == 3) { | |
9abcc5cd | 315 | to->di_changecount = cpu_to_be64(inode->i_version); |
1bc6cbe3 DC |
316 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); |
317 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
318 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
10460994 | 319 | to->di_cowextsize = cpu_to_be32(from->di_cowextsize); |
db17aebe DC |
320 | to->di_ino = cpu_to_be64(ip->i_ino); |
321 | to->di_lsn = cpu_to_be64(lsn); | |
322 | memset(to->di_pad2, 0, sizeof(to->di_pad2)); | |
323 | uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid); | |
1bc6cbe3 DC |
324 | to->di_flushiter = 0; |
325 | } else { | |
326 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
327 | } | |
328 | } | |
329 | ||
330 | void | |
331 | xfs_log_dinode_to_disk( | |
332 | struct xfs_log_dinode *from, | |
333 | struct xfs_dinode *to) | |
5e656dbb BN |
334 | { |
335 | to->di_magic = cpu_to_be16(from->di_magic); | |
336 | to->di_mode = cpu_to_be16(from->di_mode); | |
f089fc42 | 337 | to->di_version = from->di_version; |
5e656dbb | 338 | to->di_format = from->di_format; |
f089fc42 | 339 | to->di_onlink = 0; |
5e656dbb BN |
340 | to->di_uid = cpu_to_be32(from->di_uid); |
341 | to->di_gid = cpu_to_be32(from->di_gid); | |
342 | to->di_nlink = cpu_to_be32(from->di_nlink); | |
22bc10ed AM |
343 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); |
344 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
5e656dbb | 345 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
1bc6cbe3 | 346 | |
5e656dbb BN |
347 | to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); |
348 | to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); | |
349 | to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); | |
350 | to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec); | |
351 | to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec); | |
352 | to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec); | |
1bc6cbe3 | 353 | |
5e656dbb BN |
354 | to->di_size = cpu_to_be64(from->di_size); |
355 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
356 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
357 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
358 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
359 | to->di_forkoff = from->di_forkoff; | |
360 | to->di_aformat = from->di_aformat; | |
361 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
362 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
363 | to->di_flags = cpu_to_be16(from->di_flags); | |
364 | to->di_gen = cpu_to_be32(from->di_gen); | |
41ce5f36 DC |
365 | |
366 | if (from->di_version == 3) { | |
367 | to->di_changecount = cpu_to_be64(from->di_changecount); | |
368 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); | |
369 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
370 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
10460994 | 371 | to->di_cowextsize = cpu_to_be32(from->di_cowextsize); |
41ce5f36 DC |
372 | to->di_ino = cpu_to_be64(from->di_ino); |
373 | to->di_lsn = cpu_to_be64(from->di_lsn); | |
374 | memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2)); | |
f85fc622 | 375 | uuid_copy(&to->di_uuid, &from->di_uuid); |
fde71651 DC |
376 | to->di_flushiter = 0; |
377 | } else { | |
378 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
41ce5f36 DC |
379 | } |
380 | } | |
381 | ||
50bb67d6 | 382 | bool |
41ce5f36 DC |
383 | xfs_dinode_verify( |
384 | struct xfs_mount *mp, | |
e515cca1 | 385 | xfs_ino_t ino, |
41ce5f36 DC |
386 | struct xfs_dinode *dip) |
387 | { | |
3cfabff6 | 388 | uint16_t mode; |
183537ed DW |
389 | uint16_t flags; |
390 | uint64_t flags2; | |
391 | ||
41ce5f36 DC |
392 | if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC)) |
393 | return false; | |
394 | ||
9d85eb44 DW |
395 | /* don't allow invalid i_size */ |
396 | if (be64_to_cpu(dip->di_size) & (1ULL << 63)) | |
397 | return false; | |
398 | ||
3cfabff6 | 399 | mode = be16_to_cpu(dip->di_mode); |
0962b5b3 AG |
400 | if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN) |
401 | return false; | |
3cfabff6 AG |
402 | |
403 | /* No zero-length symlinks/dirs. */ | |
404 | if ((S_ISLNK(mode) || S_ISDIR(mode)) && dip->di_size == 0) | |
9d85eb44 DW |
405 | return false; |
406 | ||
41ce5f36 DC |
407 | /* only version 3 or greater inodes are extensively verified here */ |
408 | if (dip->di_version < 3) | |
409 | return true; | |
410 | ||
411 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
412 | return false; | |
413 | if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize, | |
3faddc54 | 414 | XFS_DINODE_CRC_OFF)) |
41ce5f36 | 415 | return false; |
e515cca1 | 416 | if (be64_to_cpu(dip->di_ino) != ino) |
41ce5f36 | 417 | return false; |
9c4e12fb | 418 | if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid)) |
41ce5f36 | 419 | return false; |
183537ed DW |
420 | |
421 | flags = be16_to_cpu(dip->di_flags); | |
422 | flags2 = be64_to_cpu(dip->di_flags2); | |
423 | ||
424 | /* don't allow reflink/cowextsize if we don't have reflink */ | |
425 | if ((flags2 & (XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE)) && | |
426 | !xfs_sb_version_hasreflink(&mp->m_sb)) | |
427 | return false; | |
428 | ||
429 | /* don't let reflink and realtime mix */ | |
430 | if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME)) | |
431 | return false; | |
432 | ||
378ed4e7 DW |
433 | /* don't let reflink and dax mix */ |
434 | if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX)) | |
435 | return false; | |
436 | ||
41ce5f36 DC |
437 | return true; |
438 | } | |
e6d77a21 | 439 | |
41ce5f36 DC |
440 | void |
441 | xfs_dinode_calc_crc( | |
442 | struct xfs_mount *mp, | |
443 | struct xfs_dinode *dip) | |
444 | { | |
4a492e72 | 445 | uint32_t crc; |
41ce5f36 DC |
446 | |
447 | if (dip->di_version < 3) | |
448 | return; | |
449 | ||
450 | ASSERT(xfs_sb_version_hascrc(&mp->m_sb)); | |
0bb90214 | 451 | crc = xfs_start_cksum_update((char *)dip, mp->m_sb.sb_inodesize, |
3faddc54 | 452 | XFS_DINODE_CRC_OFF); |
41ce5f36 | 453 | dip->di_crc = xfs_end_cksum(crc); |
2bd0ea18 NS |
454 | } |
455 | ||
a2ceac1f DC |
456 | /* |
457 | * Read the disk inode attributes into the in-core inode structure. | |
ff105f75 DC |
458 | * |
459 | * For version 5 superblocks, if we are initialising a new inode and we are not | |
460 | * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new | |
461 | * inode core with a random generation number. If we are keeping inodes around, | |
462 | * we need to read the inode cluster to get the existing generation number off | |
463 | * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode | |
464 | * format) then log recovery is dependent on the di_flushiter field being | |
465 | * initialised from the current on-disk value and hence we must also read the | |
466 | * inode off disk. | |
a2ceac1f DC |
467 | */ |
468 | int | |
469 | xfs_iread( | |
470 | xfs_mount_t *mp, | |
471 | xfs_trans_t *tp, | |
472 | xfs_inode_t *ip, | |
473 | uint iget_flags) | |
474 | { | |
475 | xfs_buf_t *bp; | |
476 | xfs_dinode_t *dip; | |
477 | int error; | |
478 | ||
479 | /* | |
480 | * Fill in the location information in the in-core inode. | |
481 | */ | |
482 | error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags); | |
483 | if (error) | |
484 | return error; | |
485 | ||
ff105f75 DC |
486 | /* shortcut IO on inode allocation if possible */ |
487 | if ((iget_flags & XFS_IGET_CREATE) && | |
488 | xfs_sb_version_hascrc(&mp->m_sb) && | |
489 | !(mp->m_flags & XFS_MOUNT_IKEEP)) { | |
490 | /* initialise the on-disk inode core */ | |
491 | memset(&ip->i_d, 0, sizeof(ip->i_d)); | |
6652c253 | 492 | VFS_I(ip)->i_generation = prandom_u32(); |
db17aebe | 493 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
ff105f75 | 494 | ip->i_d.di_version = 3; |
db17aebe | 495 | else |
ff105f75 DC |
496 | ip->i_d.di_version = 2; |
497 | return 0; | |
498 | } | |
499 | ||
a2ceac1f DC |
500 | /* |
501 | * Get pointers to the on-disk inode and the buffer containing it. | |
502 | */ | |
503 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags); | |
504 | if (error) | |
505 | return error; | |
506 | ||
41ce5f36 | 507 | /* even unallocated inodes are verified */ |
e515cca1 | 508 | if (!xfs_dinode_verify(mp, ip->i_ino, dip)) { |
18f2e048 | 509 | xfs_alert(mp, "%s: validation failed for inode %lld", |
41ce5f36 DC |
510 | __func__, ip->i_ino); |
511 | ||
512 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, dip); | |
12b53197 | 513 | error = -EFSCORRUPTED; |
a2ceac1f DC |
514 | goto out_brelse; |
515 | } | |
516 | ||
517 | /* | |
518 | * If the on-disk inode is already linked to a directory | |
519 | * entry, copy all of the inode into the in-core inode. | |
5d90ab5a | 520 | * xfs_iformat_fork() handles copying in the inode format |
a2ceac1f DC |
521 | * specific information. |
522 | * Otherwise, just get the truly permanent information. | |
523 | */ | |
524 | if (dip->di_mode) { | |
1bc6cbe3 | 525 | xfs_inode_from_disk(ip, dip); |
5d90ab5a | 526 | error = xfs_iformat_fork(ip, dip); |
a2ceac1f DC |
527 | if (error) { |
528 | #ifdef DEBUG | |
529 | xfs_alert(mp, "%s: xfs_iformat() returned error %d", | |
530 | __func__, error); | |
531 | #endif /* DEBUG */ | |
532 | goto out_brelse; | |
533 | } | |
534 | } else { | |
41ce5f36 DC |
535 | /* |
536 | * Partial initialisation of the in-core inode. Just the bits | |
537 | * that xfs_ialloc won't overwrite or relies on being correct. | |
538 | */ | |
a2ceac1f | 539 | ip->i_d.di_version = dip->di_version; |
6652c253 | 540 | VFS_I(ip)->i_generation = be32_to_cpu(dip->di_gen); |
a2ceac1f | 541 | ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter); |
41ce5f36 | 542 | |
a2ceac1f DC |
543 | /* |
544 | * Make sure to pull in the mode here as well in | |
545 | * case the inode is released without being used. | |
546 | * This ensures that xfs_inactive() will see that | |
547 | * the inode is already free and not try to mess | |
548 | * with the uninitialized part of it. | |
549 | */ | |
e37bf53c | 550 | VFS_I(ip)->i_mode = 0; |
a2ceac1f DC |
551 | } |
552 | ||
f089fc42 | 553 | ASSERT(ip->i_d.di_version >= 2); |
a2ceac1f DC |
554 | ip->i_delayed_blks = 0; |
555 | ||
556 | /* | |
557 | * Mark the buffer containing the inode as something to keep | |
558 | * around for a while. This helps to keep recently accessed | |
559 | * meta-data in-core longer. | |
560 | */ | |
561 | xfs_buf_set_ref(bp, XFS_INO_REF); | |
562 | ||
563 | /* | |
1d519883 DC |
564 | * Use xfs_trans_brelse() to release the buffer containing the on-disk |
565 | * inode, because it was acquired with xfs_trans_read_buf() in | |
566 | * xfs_imap_to_bp() above. If tp is NULL, this is just a normal | |
a2ceac1f DC |
567 | * brelse(). If we're within a transaction, then xfs_trans_brelse() |
568 | * will only release the buffer if it is not dirty within the | |
569 | * transaction. It will be OK to release the buffer in this case, | |
1d519883 DC |
570 | * because inodes on disk are never destroyed and we will be locking the |
571 | * new in-core inode before putting it in the cache where other | |
572 | * processes can find it. Thus we don't have to worry about the inode | |
573 | * being changed just because we released the buffer. | |
a2ceac1f DC |
574 | */ |
575 | out_brelse: | |
576 | xfs_trans_brelse(tp, bp); | |
577 | return error; | |
578 | } |