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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 | ||
5e656dbb | 114 | #ifdef DEBUG |
ea6a00d4 | 115 | xfs_alert(mp, |
a2ceac1f DC |
116 | "bad inode magic/vsn daddr %lld #%d (magic=%x)", |
117 | (unsigned long long)bp->b_bn, i, | |
56b2de80 | 118 | be16_to_cpu(dip->di_magic)); |
5e656dbb | 119 | #endif |
43f7ceb5 DW |
120 | xfs_buf_verifier_error(bp, -EFSCORRUPTED, |
121 | __func__, dip, sizeof(*dip), | |
122 | NULL); | |
5e656dbb BN |
123 | } |
124 | } | |
5e656dbb | 125 | xfs_inobp_check(mp, bp); |
a2ceac1f | 126 | } |
5e656dbb | 127 | |
e6d77a21 | 128 | |
a2ceac1f DC |
129 | static void |
130 | xfs_inode_buf_read_verify( | |
131 | struct xfs_buf *bp) | |
132 | { | |
f85fc622 DC |
133 | xfs_inode_buf_verify(bp, false); |
134 | } | |
135 | ||
136 | static void | |
137 | xfs_inode_buf_readahead_verify( | |
138 | struct xfs_buf *bp) | |
139 | { | |
140 | xfs_inode_buf_verify(bp, true); | |
5e656dbb | 141 | } |
2bd0ea18 | 142 | |
a2ceac1f DC |
143 | static void |
144 | xfs_inode_buf_write_verify( | |
145 | struct xfs_buf *bp) | |
56b2de80 | 146 | { |
f85fc622 | 147 | xfs_inode_buf_verify(bp, false); |
56b2de80 DC |
148 | } |
149 | ||
a2ceac1f | 150 | const struct xfs_buf_ops xfs_inode_buf_ops = { |
a3fac935 | 151 | .name = "xfs_inode", |
a2ceac1f DC |
152 | .verify_read = xfs_inode_buf_read_verify, |
153 | .verify_write = xfs_inode_buf_write_verify, | |
154 | }; | |
155 | ||
f85fc622 | 156 | const struct xfs_buf_ops xfs_inode_buf_ra_ops = { |
a3fac935 | 157 | .name = "xxfs_inode_ra", |
f85fc622 DC |
158 | .verify_read = xfs_inode_buf_readahead_verify, |
159 | .verify_write = xfs_inode_buf_write_verify, | |
160 | }; | |
161 | ||
162 | ||
2bd0ea18 | 163 | /* |
a2ceac1f DC |
164 | * This routine is called to map an inode to the buffer containing the on-disk |
165 | * version of the inode. It returns a pointer to the buffer containing the | |
166 | * on-disk inode in the bpp parameter, and in the dipp parameter it returns a | |
167 | * pointer to the on-disk inode within that buffer. | |
2bd0ea18 | 168 | * |
a2ceac1f DC |
169 | * If a non-zero error is returned, then the contents of bpp and dipp are |
170 | * undefined. | |
2bd0ea18 NS |
171 | */ |
172 | int | |
a2ceac1f DC |
173 | xfs_imap_to_bp( |
174 | struct xfs_mount *mp, | |
175 | struct xfs_trans *tp, | |
176 | struct xfs_imap *imap, | |
177 | struct xfs_dinode **dipp, | |
178 | struct xfs_buf **bpp, | |
179 | uint buf_flags, | |
180 | uint iget_flags) | |
2bd0ea18 | 181 | { |
a2ceac1f DC |
182 | struct xfs_buf *bp; |
183 | int error; | |
2bd0ea18 | 184 | |
a2ceac1f DC |
185 | buf_flags |= XBF_UNMAPPED; |
186 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, | |
187 | (int)imap->im_len, buf_flags, &bp, | |
188 | &xfs_inode_buf_ops); | |
189 | if (error) { | |
12b53197 | 190 | if (error == -EAGAIN) { |
a2ceac1f DC |
191 | ASSERT(buf_flags & XBF_TRYLOCK); |
192 | return error; | |
193 | } | |
2bd0ea18 | 194 | |
12b53197 | 195 | if (error == -EFSCORRUPTED && |
a2ceac1f | 196 | (iget_flags & XFS_IGET_UNTRUSTED)) |
12b53197 | 197 | return -EINVAL; |
2bd0ea18 | 198 | |
a2ceac1f DC |
199 | xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.", |
200 | __func__, error); | |
201 | return error; | |
2bd0ea18 | 202 | } |
2bd0ea18 | 203 | |
2bd0ea18 | 204 | *bpp = bp; |
92acb899 | 205 | *dipp = xfs_buf_offset(bp, imap->im_boffset); |
2bd0ea18 NS |
206 | return 0; |
207 | } | |
208 | ||
5000d01d | 209 | void |
1bc6cbe3 DC |
210 | xfs_inode_from_disk( |
211 | struct xfs_inode *ip, | |
138659f1 | 212 | struct xfs_dinode *from) |
2bd0ea18 | 213 | { |
1bc6cbe3 DC |
214 | struct xfs_icdinode *to = &ip->i_d; |
215 | struct inode *inode = VFS_I(ip); | |
216 | ||
f089fc42 DC |
217 | |
218 | /* | |
219 | * Convert v1 inodes immediately to v2 inode format as this is the | |
220 | * minimum inode version format we support in the rest of the code. | |
221 | */ | |
e37bf53c | 222 | to->di_version = from->di_version; |
f089fc42 | 223 | if (to->di_version == 1) { |
bcbe04c1 | 224 | set_nlink(inode, be16_to_cpu(from->di_onlink)); |
f089fc42 DC |
225 | to->di_projid_lo = 0; |
226 | to->di_projid_hi = 0; | |
227 | to->di_version = 2; | |
228 | } else { | |
bcbe04c1 | 229 | set_nlink(inode, be32_to_cpu(from->di_nlink)); |
f089fc42 DC |
230 | to->di_projid_lo = be16_to_cpu(from->di_projid_lo); |
231 | to->di_projid_hi = be16_to_cpu(from->di_projid_hi); | |
232 | } | |
233 | ||
5e656dbb | 234 | to->di_format = from->di_format; |
5e656dbb BN |
235 | to->di_uid = be32_to_cpu(from->di_uid); |
236 | to->di_gid = be32_to_cpu(from->di_gid); | |
5e656dbb | 237 | to->di_flushiter = be16_to_cpu(from->di_flushiter); |
1bc6cbe3 DC |
238 | |
239 | /* | |
240 | * Time is signed, so need to convert to signed 32 bit before | |
241 | * storing in inode timestamp which may be 64 bit. Otherwise | |
242 | * a time before epoch is converted to a time long after epoch | |
243 | * on 64 bit systems. | |
244 | */ | |
245 | inode->i_atime.tv_sec = (int)be32_to_cpu(from->di_atime.t_sec); | |
246 | inode->i_atime.tv_nsec = (int)be32_to_cpu(from->di_atime.t_nsec); | |
247 | inode->i_mtime.tv_sec = (int)be32_to_cpu(from->di_mtime.t_sec); | |
248 | inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec); | |
249 | inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec); | |
250 | inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec); | |
6652c253 | 251 | inode->i_generation = be32_to_cpu(from->di_gen); |
e37bf53c | 252 | inode->i_mode = be16_to_cpu(from->di_mode); |
1bc6cbe3 | 253 | |
5e656dbb BN |
254 | to->di_size = be64_to_cpu(from->di_size); |
255 | to->di_nblocks = be64_to_cpu(from->di_nblocks); | |
256 | to->di_extsize = be32_to_cpu(from->di_extsize); | |
257 | to->di_nextents = be32_to_cpu(from->di_nextents); | |
258 | to->di_anextents = be16_to_cpu(from->di_anextents); | |
259 | to->di_forkoff = from->di_forkoff; | |
260 | to->di_aformat = from->di_aformat; | |
261 | to->di_dmevmask = be32_to_cpu(from->di_dmevmask); | |
262 | to->di_dmstate = be16_to_cpu(from->di_dmstate); | |
263 | to->di_flags = be16_to_cpu(from->di_flags); | |
41ce5f36 DC |
264 | |
265 | if (to->di_version == 3) { | |
d5105a89 JL |
266 | inode_set_iversion_queried(inode, |
267 | be64_to_cpu(from->di_changecount)); | |
41ce5f36 DC |
268 | to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec); |
269 | to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec); | |
270 | to->di_flags2 = be64_to_cpu(from->di_flags2); | |
10460994 | 271 | to->di_cowextsize = be32_to_cpu(from->di_cowextsize); |
41ce5f36 | 272 | } |
5e656dbb BN |
273 | } |
274 | ||
275 | void | |
1bc6cbe3 DC |
276 | xfs_inode_to_disk( |
277 | struct xfs_inode *ip, | |
db17aebe DC |
278 | struct xfs_dinode *to, |
279 | xfs_lsn_t lsn) | |
1bc6cbe3 DC |
280 | { |
281 | struct xfs_icdinode *from = &ip->i_d; | |
282 | struct inode *inode = VFS_I(ip); | |
283 | ||
db17aebe | 284 | to->di_magic = cpu_to_be16(XFS_DINODE_MAGIC); |
f089fc42 | 285 | to->di_onlink = 0; |
db17aebe | 286 | |
db17aebe | 287 | to->di_version = from->di_version; |
1bc6cbe3 | 288 | to->di_format = from->di_format; |
1bc6cbe3 DC |
289 | to->di_uid = cpu_to_be32(from->di_uid); |
290 | to->di_gid = cpu_to_be32(from->di_gid); | |
1bc6cbe3 DC |
291 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); |
292 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
1bc6cbe3 | 293 | |
db17aebe | 294 | memset(to->di_pad, 0, sizeof(to->di_pad)); |
1bc6cbe3 DC |
295 | to->di_atime.t_sec = cpu_to_be32(inode->i_atime.tv_sec); |
296 | to->di_atime.t_nsec = cpu_to_be32(inode->i_atime.tv_nsec); | |
297 | to->di_mtime.t_sec = cpu_to_be32(inode->i_mtime.tv_sec); | |
298 | to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec); | |
299 | to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec); | |
300 | to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec); | |
bcbe04c1 | 301 | to->di_nlink = cpu_to_be32(inode->i_nlink); |
6652c253 | 302 | to->di_gen = cpu_to_be32(inode->i_generation); |
e37bf53c | 303 | to->di_mode = cpu_to_be16(inode->i_mode); |
1bc6cbe3 DC |
304 | |
305 | to->di_size = cpu_to_be64(from->di_size); | |
306 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
307 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
308 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
309 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
310 | to->di_forkoff = from->di_forkoff; | |
311 | to->di_aformat = from->di_aformat; | |
312 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
313 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
314 | to->di_flags = cpu_to_be16(from->di_flags); | |
1bc6cbe3 DC |
315 | |
316 | if (from->di_version == 3) { | |
d5105a89 | 317 | to->di_changecount = cpu_to_be64(inode_peek_iversion(inode)); |
1bc6cbe3 DC |
318 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); |
319 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
320 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
10460994 | 321 | to->di_cowextsize = cpu_to_be32(from->di_cowextsize); |
db17aebe DC |
322 | to->di_ino = cpu_to_be64(ip->i_ino); |
323 | to->di_lsn = cpu_to_be64(lsn); | |
324 | memset(to->di_pad2, 0, sizeof(to->di_pad2)); | |
325 | uuid_copy(&to->di_uuid, &ip->i_mount->m_sb.sb_meta_uuid); | |
1bc6cbe3 DC |
326 | to->di_flushiter = 0; |
327 | } else { | |
328 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
329 | } | |
330 | } | |
331 | ||
332 | void | |
333 | xfs_log_dinode_to_disk( | |
334 | struct xfs_log_dinode *from, | |
335 | struct xfs_dinode *to) | |
5e656dbb BN |
336 | { |
337 | to->di_magic = cpu_to_be16(from->di_magic); | |
338 | to->di_mode = cpu_to_be16(from->di_mode); | |
f089fc42 | 339 | to->di_version = from->di_version; |
5e656dbb | 340 | to->di_format = from->di_format; |
f089fc42 | 341 | to->di_onlink = 0; |
5e656dbb BN |
342 | to->di_uid = cpu_to_be32(from->di_uid); |
343 | to->di_gid = cpu_to_be32(from->di_gid); | |
344 | to->di_nlink = cpu_to_be32(from->di_nlink); | |
22bc10ed AM |
345 | to->di_projid_lo = cpu_to_be16(from->di_projid_lo); |
346 | to->di_projid_hi = cpu_to_be16(from->di_projid_hi); | |
5e656dbb | 347 | memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); |
1bc6cbe3 | 348 | |
5e656dbb BN |
349 | to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); |
350 | to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); | |
351 | to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); | |
352 | to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec); | |
353 | to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec); | |
354 | to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec); | |
1bc6cbe3 | 355 | |
5e656dbb BN |
356 | to->di_size = cpu_to_be64(from->di_size); |
357 | to->di_nblocks = cpu_to_be64(from->di_nblocks); | |
358 | to->di_extsize = cpu_to_be32(from->di_extsize); | |
359 | to->di_nextents = cpu_to_be32(from->di_nextents); | |
360 | to->di_anextents = cpu_to_be16(from->di_anextents); | |
361 | to->di_forkoff = from->di_forkoff; | |
362 | to->di_aformat = from->di_aformat; | |
363 | to->di_dmevmask = cpu_to_be32(from->di_dmevmask); | |
364 | to->di_dmstate = cpu_to_be16(from->di_dmstate); | |
365 | to->di_flags = cpu_to_be16(from->di_flags); | |
366 | to->di_gen = cpu_to_be32(from->di_gen); | |
41ce5f36 DC |
367 | |
368 | if (from->di_version == 3) { | |
369 | to->di_changecount = cpu_to_be64(from->di_changecount); | |
370 | to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec); | |
371 | to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec); | |
372 | to->di_flags2 = cpu_to_be64(from->di_flags2); | |
10460994 | 373 | to->di_cowextsize = cpu_to_be32(from->di_cowextsize); |
41ce5f36 DC |
374 | to->di_ino = cpu_to_be64(from->di_ino); |
375 | to->di_lsn = cpu_to_be64(from->di_lsn); | |
376 | memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2)); | |
f85fc622 | 377 | uuid_copy(&to->di_uuid, &from->di_uuid); |
fde71651 DC |
378 | to->di_flushiter = 0; |
379 | } else { | |
380 | to->di_flushiter = cpu_to_be16(from->di_flushiter); | |
41ce5f36 DC |
381 | } |
382 | } | |
383 | ||
bc01119d | 384 | xfs_failaddr_t |
41ce5f36 DC |
385 | xfs_dinode_verify( |
386 | struct xfs_mount *mp, | |
e515cca1 | 387 | xfs_ino_t ino, |
41ce5f36 DC |
388 | struct xfs_dinode *dip) |
389 | { | |
3cfabff6 | 390 | uint16_t mode; |
183537ed DW |
391 | uint16_t flags; |
392 | uint64_t flags2; | |
ad42e5a1 | 393 | uint64_t di_size; |
183537ed | 394 | |
41ce5f36 | 395 | if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC)) |
bc01119d | 396 | return __this_address; |
41ce5f36 | 397 | |
98703400 DW |
398 | /* Verify v3 integrity information first */ |
399 | if (dip->di_version >= 3) { | |
400 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
401 | return __this_address; | |
402 | if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize, | |
403 | XFS_DINODE_CRC_OFF)) | |
404 | return __this_address; | |
405 | if (be64_to_cpu(dip->di_ino) != ino) | |
406 | return __this_address; | |
407 | if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_meta_uuid)) | |
408 | return __this_address; | |
409 | } | |
410 | ||
9d85eb44 | 411 | /* don't allow invalid i_size */ |
ad42e5a1 DW |
412 | di_size = be64_to_cpu(dip->di_size); |
413 | if (di_size & (1ULL << 63)) | |
bc01119d | 414 | return __this_address; |
9d85eb44 | 415 | |
3cfabff6 | 416 | mode = be16_to_cpu(dip->di_mode); |
0962b5b3 | 417 | if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN) |
bc01119d | 418 | return __this_address; |
3cfabff6 AG |
419 | |
420 | /* No zero-length symlinks/dirs. */ | |
ad42e5a1 | 421 | if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0) |
bc01119d | 422 | return __this_address; |
9d85eb44 | 423 | |
ad42e5a1 DW |
424 | /* Fork checks carried over from xfs_iformat_fork */ |
425 | if (mode && | |
426 | be32_to_cpu(dip->di_nextents) + be16_to_cpu(dip->di_anextents) > | |
427 | be64_to_cpu(dip->di_nblocks)) | |
428 | return __this_address; | |
429 | ||
430 | if (mode && XFS_DFORK_BOFF(dip) > mp->m_sb.sb_inodesize) | |
431 | return __this_address; | |
432 | ||
433 | flags = be16_to_cpu(dip->di_flags); | |
434 | ||
435 | if (mode && (flags & XFS_DIFLAG_REALTIME) && !mp->m_rtdev_targp) | |
436 | return __this_address; | |
437 | ||
438 | /* Do we have appropriate data fork formats for the mode? */ | |
439 | switch (mode & S_IFMT) { | |
440 | case S_IFIFO: | |
441 | case S_IFCHR: | |
442 | case S_IFBLK: | |
443 | case S_IFSOCK: | |
444 | if (dip->di_format != XFS_DINODE_FMT_DEV) | |
445 | return __this_address; | |
446 | break; | |
447 | case S_IFREG: | |
448 | case S_IFLNK: | |
449 | case S_IFDIR: | |
450 | switch (dip->di_format) { | |
451 | case XFS_DINODE_FMT_LOCAL: | |
452 | /* | |
453 | * no local regular files yet | |
454 | */ | |
455 | if (S_ISREG(mode)) | |
456 | return __this_address; | |
457 | if (di_size > XFS_DFORK_DSIZE(dip, mp)) | |
458 | return __this_address; | |
459 | /* fall through */ | |
460 | case XFS_DINODE_FMT_EXTENTS: | |
461 | case XFS_DINODE_FMT_BTREE: | |
462 | break; | |
463 | default: | |
464 | return __this_address; | |
465 | } | |
466 | break; | |
467 | case 0: | |
468 | /* Uninitialized inode ok. */ | |
469 | break; | |
470 | default: | |
471 | return __this_address; | |
472 | } | |
473 | ||
474 | if (XFS_DFORK_Q(dip)) { | |
475 | switch (dip->di_aformat) { | |
476 | case XFS_DINODE_FMT_LOCAL: | |
477 | case XFS_DINODE_FMT_EXTENTS: | |
478 | case XFS_DINODE_FMT_BTREE: | |
479 | break; | |
480 | default: | |
481 | return __this_address; | |
482 | } | |
483 | } | |
484 | ||
41ce5f36 DC |
485 | /* only version 3 or greater inodes are extensively verified here */ |
486 | if (dip->di_version < 3) | |
bc01119d | 487 | return NULL; |
41ce5f36 | 488 | |
183537ed DW |
489 | flags2 = be64_to_cpu(dip->di_flags2); |
490 | ||
491 | /* don't allow reflink/cowextsize if we don't have reflink */ | |
492 | if ((flags2 & (XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE)) && | |
493 | !xfs_sb_version_hasreflink(&mp->m_sb)) | |
bc01119d | 494 | return __this_address; |
183537ed | 495 | |
ad42e5a1 DW |
496 | /* only regular files get reflink */ |
497 | if ((flags2 & XFS_DIFLAG2_REFLINK) && (mode & S_IFMT) != S_IFREG) | |
498 | return __this_address; | |
499 | ||
183537ed DW |
500 | /* don't let reflink and realtime mix */ |
501 | if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags & XFS_DIFLAG_REALTIME)) | |
bc01119d | 502 | return __this_address; |
183537ed | 503 | |
378ed4e7 DW |
504 | /* don't let reflink and dax mix */ |
505 | if ((flags2 & XFS_DIFLAG2_REFLINK) && (flags2 & XFS_DIFLAG2_DAX)) | |
bc01119d | 506 | return __this_address; |
378ed4e7 | 507 | |
bc01119d | 508 | return NULL; |
41ce5f36 | 509 | } |
e6d77a21 | 510 | |
41ce5f36 DC |
511 | void |
512 | xfs_dinode_calc_crc( | |
513 | struct xfs_mount *mp, | |
514 | struct xfs_dinode *dip) | |
515 | { | |
4a492e72 | 516 | uint32_t crc; |
41ce5f36 DC |
517 | |
518 | if (dip->di_version < 3) | |
519 | return; | |
520 | ||
521 | ASSERT(xfs_sb_version_hascrc(&mp->m_sb)); | |
0bb90214 | 522 | crc = xfs_start_cksum_update((char *)dip, mp->m_sb.sb_inodesize, |
3faddc54 | 523 | XFS_DINODE_CRC_OFF); |
41ce5f36 | 524 | dip->di_crc = xfs_end_cksum(crc); |
2bd0ea18 NS |
525 | } |
526 | ||
a2ceac1f DC |
527 | /* |
528 | * Read the disk inode attributes into the in-core inode structure. | |
ff105f75 DC |
529 | * |
530 | * For version 5 superblocks, if we are initialising a new inode and we are not | |
531 | * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new | |
532 | * inode core with a random generation number. If we are keeping inodes around, | |
533 | * we need to read the inode cluster to get the existing generation number off | |
534 | * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode | |
535 | * format) then log recovery is dependent on the di_flushiter field being | |
536 | * initialised from the current on-disk value and hence we must also read the | |
537 | * inode off disk. | |
a2ceac1f DC |
538 | */ |
539 | int | |
540 | xfs_iread( | |
541 | xfs_mount_t *mp, | |
542 | xfs_trans_t *tp, | |
543 | xfs_inode_t *ip, | |
544 | uint iget_flags) | |
545 | { | |
546 | xfs_buf_t *bp; | |
547 | xfs_dinode_t *dip; | |
bc01119d | 548 | xfs_failaddr_t fa; |
a2ceac1f DC |
549 | int error; |
550 | ||
551 | /* | |
552 | * Fill in the location information in the in-core inode. | |
553 | */ | |
554 | error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags); | |
555 | if (error) | |
556 | return error; | |
557 | ||
ff105f75 DC |
558 | /* shortcut IO on inode allocation if possible */ |
559 | if ((iget_flags & XFS_IGET_CREATE) && | |
560 | xfs_sb_version_hascrc(&mp->m_sb) && | |
561 | !(mp->m_flags & XFS_MOUNT_IKEEP)) { | |
562 | /* initialise the on-disk inode core */ | |
563 | memset(&ip->i_d, 0, sizeof(ip->i_d)); | |
6652c253 | 564 | VFS_I(ip)->i_generation = prandom_u32(); |
db17aebe | 565 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
ff105f75 | 566 | ip->i_d.di_version = 3; |
db17aebe | 567 | else |
ff105f75 DC |
568 | ip->i_d.di_version = 2; |
569 | return 0; | |
570 | } | |
571 | ||
a2ceac1f DC |
572 | /* |
573 | * Get pointers to the on-disk inode and the buffer containing it. | |
574 | */ | |
575 | error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags); | |
576 | if (error) | |
577 | return error; | |
578 | ||
41ce5f36 | 579 | /* even unallocated inodes are verified */ |
bc01119d DW |
580 | fa = xfs_dinode_verify(mp, ip->i_ino, dip); |
581 | if (fa) { | |
1d3bac1f DW |
582 | xfs_inode_verifier_error(ip, -EFSCORRUPTED, "dinode", dip, |
583 | sizeof(*dip), fa); | |
12b53197 | 584 | error = -EFSCORRUPTED; |
a2ceac1f DC |
585 | goto out_brelse; |
586 | } | |
587 | ||
588 | /* | |
589 | * If the on-disk inode is already linked to a directory | |
590 | * entry, copy all of the inode into the in-core inode. | |
5d90ab5a | 591 | * xfs_iformat_fork() handles copying in the inode format |
a2ceac1f DC |
592 | * specific information. |
593 | * Otherwise, just get the truly permanent information. | |
594 | */ | |
595 | if (dip->di_mode) { | |
1bc6cbe3 | 596 | xfs_inode_from_disk(ip, dip); |
5d90ab5a | 597 | error = xfs_iformat_fork(ip, dip); |
a2ceac1f DC |
598 | if (error) { |
599 | #ifdef DEBUG | |
600 | xfs_alert(mp, "%s: xfs_iformat() returned error %d", | |
601 | __func__, error); | |
602 | #endif /* DEBUG */ | |
603 | goto out_brelse; | |
604 | } | |
605 | } else { | |
41ce5f36 DC |
606 | /* |
607 | * Partial initialisation of the in-core inode. Just the bits | |
608 | * that xfs_ialloc won't overwrite or relies on being correct. | |
609 | */ | |
a2ceac1f | 610 | ip->i_d.di_version = dip->di_version; |
6652c253 | 611 | VFS_I(ip)->i_generation = be32_to_cpu(dip->di_gen); |
a2ceac1f | 612 | ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter); |
41ce5f36 | 613 | |
a2ceac1f DC |
614 | /* |
615 | * Make sure to pull in the mode here as well in | |
616 | * case the inode is released without being used. | |
617 | * This ensures that xfs_inactive() will see that | |
618 | * the inode is already free and not try to mess | |
619 | * with the uninitialized part of it. | |
620 | */ | |
e37bf53c | 621 | VFS_I(ip)->i_mode = 0; |
a2ceac1f DC |
622 | } |
623 | ||
f089fc42 | 624 | ASSERT(ip->i_d.di_version >= 2); |
a2ceac1f DC |
625 | ip->i_delayed_blks = 0; |
626 | ||
627 | /* | |
628 | * Mark the buffer containing the inode as something to keep | |
629 | * around for a while. This helps to keep recently accessed | |
630 | * meta-data in-core longer. | |
631 | */ | |
632 | xfs_buf_set_ref(bp, XFS_INO_REF); | |
633 | ||
634 | /* | |
1d519883 DC |
635 | * Use xfs_trans_brelse() to release the buffer containing the on-disk |
636 | * inode, because it was acquired with xfs_trans_read_buf() in | |
637 | * xfs_imap_to_bp() above. If tp is NULL, this is just a normal | |
a2ceac1f DC |
638 | * brelse(). If we're within a transaction, then xfs_trans_brelse() |
639 | * will only release the buffer if it is not dirty within the | |
640 | * transaction. It will be OK to release the buffer in this case, | |
1d519883 DC |
641 | * because inodes on disk are never destroyed and we will be locking the |
642 | * new in-core inode before putting it in the cache where other | |
643 | * processes can find it. Thus we don't have to worry about the inode | |
644 | * being changed just because we released the buffer. | |
a2ceac1f DC |
645 | */ |
646 | out_brelse: | |
647 | xfs_trans_brelse(tp, bp); | |
648 | return error; | |
649 | } | |
fd0c360d DW |
650 | |
651 | /* | |
652 | * Validate di_extsize hint. | |
653 | * | |
654 | * The rules are documented at xfs_ioctl_setattr_check_extsize(). | |
655 | * These functions must be kept in sync with each other. | |
656 | */ | |
657 | xfs_failaddr_t | |
658 | xfs_inode_validate_extsize( | |
659 | struct xfs_mount *mp, | |
660 | uint32_t extsize, | |
661 | uint16_t mode, | |
662 | uint16_t flags) | |
663 | { | |
664 | bool rt_flag; | |
665 | bool hint_flag; | |
666 | bool inherit_flag; | |
667 | uint32_t extsize_bytes; | |
668 | uint32_t blocksize_bytes; | |
669 | ||
670 | rt_flag = (flags & XFS_DIFLAG_REALTIME); | |
671 | hint_flag = (flags & XFS_DIFLAG_EXTSIZE); | |
672 | inherit_flag = (flags & XFS_DIFLAG_EXTSZINHERIT); | |
673 | extsize_bytes = XFS_FSB_TO_B(mp, extsize); | |
674 | ||
675 | if (rt_flag) | |
676 | blocksize_bytes = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; | |
677 | else | |
678 | blocksize_bytes = mp->m_sb.sb_blocksize; | |
679 | ||
680 | if ((hint_flag || inherit_flag) && !(S_ISDIR(mode) || S_ISREG(mode))) | |
681 | return __this_address; | |
682 | ||
683 | if (hint_flag && !S_ISREG(mode)) | |
684 | return __this_address; | |
685 | ||
686 | if (inherit_flag && !S_ISDIR(mode)) | |
687 | return __this_address; | |
688 | ||
689 | if ((hint_flag || inherit_flag) && extsize == 0) | |
690 | return __this_address; | |
691 | ||
692 | if (!(hint_flag || inherit_flag) && extsize != 0) | |
693 | return __this_address; | |
694 | ||
695 | if (extsize_bytes % blocksize_bytes) | |
696 | return __this_address; | |
697 | ||
698 | if (extsize > MAXEXTLEN) | |
699 | return __this_address; | |
700 | ||
701 | if (!rt_flag && extsize > mp->m_sb.sb_agblocks / 2) | |
702 | return __this_address; | |
703 | ||
704 | return NULL; | |
705 | } | |
706 | ||
707 | /* | |
708 | * Validate di_cowextsize hint. | |
709 | * | |
710 | * The rules are documented at xfs_ioctl_setattr_check_cowextsize(). | |
711 | * These functions must be kept in sync with each other. | |
712 | */ | |
713 | xfs_failaddr_t | |
714 | xfs_inode_validate_cowextsize( | |
715 | struct xfs_mount *mp, | |
716 | uint32_t cowextsize, | |
717 | uint16_t mode, | |
718 | uint16_t flags, | |
719 | uint64_t flags2) | |
720 | { | |
721 | bool rt_flag; | |
722 | bool hint_flag; | |
723 | uint32_t cowextsize_bytes; | |
724 | ||
725 | rt_flag = (flags & XFS_DIFLAG_REALTIME); | |
726 | hint_flag = (flags2 & XFS_DIFLAG2_COWEXTSIZE); | |
727 | cowextsize_bytes = XFS_FSB_TO_B(mp, cowextsize); | |
728 | ||
729 | if (hint_flag && !xfs_sb_version_hasreflink(&mp->m_sb)) | |
730 | return __this_address; | |
731 | ||
732 | if (hint_flag && !(S_ISDIR(mode) || S_ISREG(mode))) | |
733 | return __this_address; | |
734 | ||
735 | if (hint_flag && cowextsize == 0) | |
736 | return __this_address; | |
737 | ||
738 | if (!hint_flag && cowextsize != 0) | |
739 | return __this_address; | |
740 | ||
741 | if (hint_flag && rt_flag) | |
742 | return __this_address; | |
743 | ||
744 | if (cowextsize_bytes % mp->m_sb.sb_blocksize) | |
745 | return __this_address; | |
746 | ||
747 | if (cowextsize > MAXEXTLEN) | |
748 | return __this_address; | |
749 | ||
750 | if (cowextsize > mp->m_sb.sb_agblocks / 2) | |
751 | return __this_address; | |
752 | ||
753 | return NULL; | |
754 | } |