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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 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. | |
1da177e4 | 13 | * |
7b718769 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 | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
632b89e8 | 20 | #include "xfs_shared.h" |
a4fbe6ab | 21 | #include "xfs_format.h" |
239880ef DC |
22 | #include "xfs_log_format.h" |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_bit.h" |
1da177e4 | 25 | #include "xfs_mount.h" |
a844f451 | 26 | #include "xfs_inode.h" |
1da177e4 LT |
27 | #include "xfs_btree.h" |
28 | #include "xfs_ialloc.h" | |
a4fbe6ab | 29 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
30 | #include "xfs_alloc.h" |
31 | #include "xfs_error.h" | |
3d3e6f64 | 32 | #include "xfs_trace.h" |
ee1a47ab | 33 | #include "xfs_cksum.h" |
239880ef | 34 | #include "xfs_trans.h" |
1da177e4 | 35 | |
1da177e4 | 36 | |
91cca5df CH |
37 | STATIC int |
38 | xfs_inobt_get_minrecs( | |
39 | struct xfs_btree_cur *cur, | |
40 | int level) | |
41 | { | |
42 | return cur->bc_mp->m_inobt_mnr[level != 0]; | |
43 | } | |
1da177e4 | 44 | |
561f7d17 CH |
45 | STATIC struct xfs_btree_cur * |
46 | xfs_inobt_dup_cursor( | |
47 | struct xfs_btree_cur *cur) | |
48 | { | |
49 | return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp, | |
57bd3dbe BF |
50 | cur->bc_private.a.agbp, cur->bc_private.a.agno, |
51 | cur->bc_btnum); | |
561f7d17 CH |
52 | } |
53 | ||
344207ce CH |
54 | STATIC void |
55 | xfs_inobt_set_root( | |
56 | struct xfs_btree_cur *cur, | |
57 | union xfs_btree_ptr *nptr, | |
58 | int inc) /* level change */ | |
59 | { | |
60 | struct xfs_buf *agbp = cur->bc_private.a.agbp; | |
61 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); | |
62 | ||
63 | agi->agi_root = nptr->s; | |
64 | be32_add_cpu(&agi->agi_level, inc); | |
65 | xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL); | |
66 | } | |
67 | ||
aafc3c24 BF |
68 | STATIC void |
69 | xfs_finobt_set_root( | |
70 | struct xfs_btree_cur *cur, | |
71 | union xfs_btree_ptr *nptr, | |
72 | int inc) /* level change */ | |
73 | { | |
74 | struct xfs_buf *agbp = cur->bc_private.a.agbp; | |
75 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); | |
76 | ||
77 | agi->agi_free_root = nptr->s; | |
78 | be32_add_cpu(&agi->agi_free_level, inc); | |
79 | xfs_ialloc_log_agi(cur->bc_tp, agbp, | |
80 | XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL); | |
81 | } | |
82 | ||
f5eb8e7c CH |
83 | STATIC int |
84 | xfs_inobt_alloc_block( | |
85 | struct xfs_btree_cur *cur, | |
86 | union xfs_btree_ptr *start, | |
87 | union xfs_btree_ptr *new, | |
f5eb8e7c CH |
88 | int *stat) |
89 | { | |
90 | xfs_alloc_arg_t args; /* block allocation args */ | |
91 | int error; /* error return value */ | |
92 | xfs_agblock_t sbno = be32_to_cpu(start->s); | |
93 | ||
94 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); | |
95 | ||
96 | memset(&args, 0, sizeof(args)); | |
97 | args.tp = cur->bc_tp; | |
98 | args.mp = cur->bc_mp; | |
99 | args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, sbno); | |
100 | args.minlen = 1; | |
101 | args.maxlen = 1; | |
102 | args.prod = 1; | |
103 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
104 | ||
105 | error = xfs_alloc_vextent(&args); | |
106 | if (error) { | |
107 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
108 | return error; | |
109 | } | |
110 | if (args.fsbno == NULLFSBLOCK) { | |
111 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
112 | *stat = 0; | |
113 | return 0; | |
114 | } | |
115 | ASSERT(args.len == 1); | |
116 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
117 | ||
118 | new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno)); | |
119 | *stat = 1; | |
120 | return 0; | |
121 | } | |
122 | ||
d4b3a4b7 CH |
123 | STATIC int |
124 | xfs_inobt_free_block( | |
125 | struct xfs_btree_cur *cur, | |
126 | struct xfs_buf *bp) | |
127 | { | |
128 | xfs_fsblock_t fsbno; | |
129 | int error; | |
130 | ||
131 | fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp)); | |
132 | error = xfs_free_extent(cur->bc_tp, fsbno, 1); | |
133 | if (error) | |
134 | return error; | |
135 | ||
136 | xfs_trans_binval(cur->bc_tp, bp); | |
137 | return error; | |
138 | } | |
f5eb8e7c | 139 | |
ce5e42db CH |
140 | STATIC int |
141 | xfs_inobt_get_maxrecs( | |
142 | struct xfs_btree_cur *cur, | |
143 | int level) | |
144 | { | |
145 | return cur->bc_mp->m_inobt_mxr[level != 0]; | |
146 | } | |
147 | ||
fe033cc8 CH |
148 | STATIC void |
149 | xfs_inobt_init_key_from_rec( | |
150 | union xfs_btree_key *key, | |
151 | union xfs_btree_rec *rec) | |
152 | { | |
153 | key->inobt.ir_startino = rec->inobt.ir_startino; | |
154 | } | |
155 | ||
4b22a571 CH |
156 | STATIC void |
157 | xfs_inobt_init_rec_from_key( | |
158 | union xfs_btree_key *key, | |
159 | union xfs_btree_rec *rec) | |
160 | { | |
161 | rec->inobt.ir_startino = key->inobt.ir_startino; | |
162 | } | |
163 | ||
164 | STATIC void | |
165 | xfs_inobt_init_rec_from_cur( | |
166 | struct xfs_btree_cur *cur, | |
167 | union xfs_btree_rec *rec) | |
168 | { | |
169 | rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino); | |
5419040f BF |
170 | if (xfs_sb_version_hassparseinodes(&cur->bc_mp->m_sb)) { |
171 | rec->inobt.ir_u.sp.ir_holemask = | |
172 | cpu_to_be16(cur->bc_rec.i.ir_holemask); | |
173 | rec->inobt.ir_u.sp.ir_count = cur->bc_rec.i.ir_count; | |
174 | rec->inobt.ir_u.sp.ir_freecount = cur->bc_rec.i.ir_freecount; | |
175 | } else { | |
176 | /* ir_holemask/ir_count not supported on-disk */ | |
177 | rec->inobt.ir_u.f.ir_freecount = | |
178 | cpu_to_be32(cur->bc_rec.i.ir_freecount); | |
179 | } | |
4b22a571 CH |
180 | rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free); |
181 | } | |
182 | ||
fe033cc8 | 183 | /* |
9da096fd | 184 | * initial value of ptr for lookup |
fe033cc8 CH |
185 | */ |
186 | STATIC void | |
187 | xfs_inobt_init_ptr_from_cur( | |
188 | struct xfs_btree_cur *cur, | |
189 | union xfs_btree_ptr *ptr) | |
190 | { | |
191 | struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp); | |
192 | ||
193 | ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno)); | |
194 | ||
195 | ptr->s = agi->agi_root; | |
196 | } | |
197 | ||
aafc3c24 BF |
198 | STATIC void |
199 | xfs_finobt_init_ptr_from_cur( | |
200 | struct xfs_btree_cur *cur, | |
201 | union xfs_btree_ptr *ptr) | |
202 | { | |
203 | struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp); | |
204 | ||
205 | ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno)); | |
206 | ptr->s = agi->agi_free_root; | |
207 | } | |
208 | ||
fe033cc8 CH |
209 | STATIC __int64_t |
210 | xfs_inobt_key_diff( | |
211 | struct xfs_btree_cur *cur, | |
212 | union xfs_btree_key *key) | |
213 | { | |
214 | return (__int64_t)be32_to_cpu(key->inobt.ir_startino) - | |
215 | cur->bc_rec.i.ir_startino; | |
216 | } | |
217 | ||
ee1a47ab | 218 | static int |
612cfbfe | 219 | xfs_inobt_verify( |
3d3e6f64 DC |
220 | struct xfs_buf *bp) |
221 | { | |
222 | struct xfs_mount *mp = bp->b_target->bt_mount; | |
223 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
ee1a47ab | 224 | struct xfs_perag *pag = bp->b_pag; |
3d3e6f64 | 225 | unsigned int level; |
3d3e6f64 | 226 | |
ee1a47ab CH |
227 | /* |
228 | * During growfs operations, we can't verify the exact owner as the | |
229 | * perag is not fully initialised and hence not attached to the buffer. | |
230 | * | |
231 | * Similarly, during log recovery we will have a perag structure | |
232 | * attached, but the agi information will not yet have been initialised | |
233 | * from the on disk AGI. We don't currently use any of this information, | |
234 | * but beware of the landmine (i.e. need to check pag->pagi_init) if we | |
235 | * ever do. | |
236 | */ | |
237 | switch (block->bb_magic) { | |
238 | case cpu_to_be32(XFS_IBT_CRC_MAGIC): | |
aafc3c24 | 239 | case cpu_to_be32(XFS_FIBT_CRC_MAGIC): |
ee1a47ab CH |
240 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
241 | return false; | |
242 | if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_uuid)) | |
243 | return false; | |
244 | if (block->bb_u.s.bb_blkno != cpu_to_be64(bp->b_bn)) | |
245 | return false; | |
246 | if (pag && | |
247 | be32_to_cpu(block->bb_u.s.bb_owner) != pag->pag_agno) | |
248 | return false; | |
249 | /* fall through */ | |
250 | case cpu_to_be32(XFS_IBT_MAGIC): | |
aafc3c24 | 251 | case cpu_to_be32(XFS_FIBT_MAGIC): |
ee1a47ab CH |
252 | break; |
253 | default: | |
254 | return 0; | |
255 | } | |
3d3e6f64 | 256 | |
ee1a47ab CH |
257 | /* numrecs and level verification */ |
258 | level = be16_to_cpu(block->bb_level); | |
259 | if (level >= mp->m_in_maxlevels) | |
260 | return false; | |
261 | if (be16_to_cpu(block->bb_numrecs) > mp->m_inobt_mxr[level != 0]) | |
262 | return false; | |
3d3e6f64 DC |
263 | |
264 | /* sibling pointer verification */ | |
ee1a47ab CH |
265 | if (!block->bb_u.s.bb_leftsib || |
266 | (be32_to_cpu(block->bb_u.s.bb_leftsib) >= mp->m_sb.sb_agblocks && | |
267 | block->bb_u.s.bb_leftsib != cpu_to_be32(NULLAGBLOCK))) | |
268 | return false; | |
269 | if (!block->bb_u.s.bb_rightsib || | |
270 | (be32_to_cpu(block->bb_u.s.bb_rightsib) >= mp->m_sb.sb_agblocks && | |
271 | block->bb_u.s.bb_rightsib != cpu_to_be32(NULLAGBLOCK))) | |
272 | return false; | |
273 | ||
274 | return true; | |
612cfbfe DC |
275 | } |
276 | ||
277 | static void | |
1813dd64 | 278 | xfs_inobt_read_verify( |
612cfbfe DC |
279 | struct xfs_buf *bp) |
280 | { | |
ce5028cf | 281 | if (!xfs_btree_sblock_verify_crc(bp)) |
2451337d | 282 | xfs_buf_ioerror(bp, -EFSBADCRC); |
ce5028cf | 283 | else if (!xfs_inobt_verify(bp)) |
2451337d | 284 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf ES |
285 | |
286 | if (bp->b_error) { | |
287 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
288 | xfs_verifier_error(bp); | |
ee1a47ab | 289 | } |
612cfbfe | 290 | } |
3d3e6f64 | 291 | |
1813dd64 DC |
292 | static void |
293 | xfs_inobt_write_verify( | |
612cfbfe DC |
294 | struct xfs_buf *bp) |
295 | { | |
ee1a47ab CH |
296 | if (!xfs_inobt_verify(bp)) { |
297 | trace_xfs_btree_corrupt(bp, _RET_IP_); | |
2451337d | 298 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
ce5028cf | 299 | xfs_verifier_error(bp); |
e0d2c23a | 300 | return; |
ee1a47ab CH |
301 | } |
302 | xfs_btree_sblock_calc_crc(bp); | |
303 | ||
3d3e6f64 DC |
304 | } |
305 | ||
1813dd64 DC |
306 | const struct xfs_buf_ops xfs_inobt_buf_ops = { |
307 | .verify_read = xfs_inobt_read_verify, | |
308 | .verify_write = xfs_inobt_write_verify, | |
309 | }; | |
310 | ||
742ae1e3 | 311 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
312 | STATIC int |
313 | xfs_inobt_keys_inorder( | |
314 | struct xfs_btree_cur *cur, | |
315 | union xfs_btree_key *k1, | |
316 | union xfs_btree_key *k2) | |
317 | { | |
318 | return be32_to_cpu(k1->inobt.ir_startino) < | |
319 | be32_to_cpu(k2->inobt.ir_startino); | |
320 | } | |
321 | ||
322 | STATIC int | |
323 | xfs_inobt_recs_inorder( | |
324 | struct xfs_btree_cur *cur, | |
325 | union xfs_btree_rec *r1, | |
326 | union xfs_btree_rec *r2) | |
327 | { | |
328 | return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <= | |
329 | be32_to_cpu(r2->inobt.ir_startino); | |
330 | } | |
331 | #endif /* DEBUG */ | |
332 | ||
561f7d17 | 333 | static const struct xfs_btree_ops xfs_inobt_ops = { |
65f1eaea CH |
334 | .rec_len = sizeof(xfs_inobt_rec_t), |
335 | .key_len = sizeof(xfs_inobt_key_t), | |
336 | ||
561f7d17 | 337 | .dup_cursor = xfs_inobt_dup_cursor, |
344207ce | 338 | .set_root = xfs_inobt_set_root, |
f5eb8e7c | 339 | .alloc_block = xfs_inobt_alloc_block, |
d4b3a4b7 | 340 | .free_block = xfs_inobt_free_block, |
91cca5df | 341 | .get_minrecs = xfs_inobt_get_minrecs, |
ce5e42db | 342 | .get_maxrecs = xfs_inobt_get_maxrecs, |
fe033cc8 | 343 | .init_key_from_rec = xfs_inobt_init_key_from_rec, |
4b22a571 CH |
344 | .init_rec_from_key = xfs_inobt_init_rec_from_key, |
345 | .init_rec_from_cur = xfs_inobt_init_rec_from_cur, | |
fe033cc8 CH |
346 | .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur, |
347 | .key_diff = xfs_inobt_key_diff, | |
1813dd64 | 348 | .buf_ops = &xfs_inobt_buf_ops, |
742ae1e3 | 349 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
350 | .keys_inorder = xfs_inobt_keys_inorder, |
351 | .recs_inorder = xfs_inobt_recs_inorder, | |
352 | #endif | |
561f7d17 CH |
353 | }; |
354 | ||
aafc3c24 BF |
355 | static const struct xfs_btree_ops xfs_finobt_ops = { |
356 | .rec_len = sizeof(xfs_inobt_rec_t), | |
357 | .key_len = sizeof(xfs_inobt_key_t), | |
358 | ||
359 | .dup_cursor = xfs_inobt_dup_cursor, | |
360 | .set_root = xfs_finobt_set_root, | |
361 | .alloc_block = xfs_inobt_alloc_block, | |
362 | .free_block = xfs_inobt_free_block, | |
363 | .get_minrecs = xfs_inobt_get_minrecs, | |
364 | .get_maxrecs = xfs_inobt_get_maxrecs, | |
365 | .init_key_from_rec = xfs_inobt_init_key_from_rec, | |
366 | .init_rec_from_key = xfs_inobt_init_rec_from_key, | |
367 | .init_rec_from_cur = xfs_inobt_init_rec_from_cur, | |
368 | .init_ptr_from_cur = xfs_finobt_init_ptr_from_cur, | |
369 | .key_diff = xfs_inobt_key_diff, | |
370 | .buf_ops = &xfs_inobt_buf_ops, | |
371 | #if defined(DEBUG) || defined(XFS_WARN) | |
372 | .keys_inorder = xfs_inobt_keys_inorder, | |
373 | .recs_inorder = xfs_inobt_recs_inorder, | |
374 | #endif | |
375 | }; | |
376 | ||
561f7d17 CH |
377 | /* |
378 | * Allocate a new inode btree cursor. | |
379 | */ | |
380 | struct xfs_btree_cur * /* new inode btree cursor */ | |
381 | xfs_inobt_init_cursor( | |
382 | struct xfs_mount *mp, /* file system mount point */ | |
383 | struct xfs_trans *tp, /* transaction pointer */ | |
384 | struct xfs_buf *agbp, /* buffer for agi structure */ | |
57bd3dbe BF |
385 | xfs_agnumber_t agno, /* allocation group number */ |
386 | xfs_btnum_t btnum) /* ialloc or free ino btree */ | |
561f7d17 CH |
387 | { |
388 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); | |
389 | struct xfs_btree_cur *cur; | |
390 | ||
391 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
392 | ||
393 | cur->bc_tp = tp; | |
394 | cur->bc_mp = mp; | |
57bd3dbe | 395 | cur->bc_btnum = btnum; |
aafc3c24 BF |
396 | if (btnum == XFS_BTNUM_INO) { |
397 | cur->bc_nlevels = be32_to_cpu(agi->agi_level); | |
398 | cur->bc_ops = &xfs_inobt_ops; | |
399 | } else { | |
400 | cur->bc_nlevels = be32_to_cpu(agi->agi_free_level); | |
401 | cur->bc_ops = &xfs_finobt_ops; | |
402 | } | |
403 | ||
561f7d17 CH |
404 | cur->bc_blocklog = mp->m_sb.sb_blocklog; |
405 | ||
ee1a47ab CH |
406 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
407 | cur->bc_flags |= XFS_BTREE_CRC_BLOCKS; | |
561f7d17 CH |
408 | |
409 | cur->bc_private.a.agbp = agbp; | |
410 | cur->bc_private.a.agno = agno; | |
411 | ||
412 | return cur; | |
413 | } | |
60197e8d CH |
414 | |
415 | /* | |
416 | * Calculate number of records in an inobt btree block. | |
417 | */ | |
418 | int | |
419 | xfs_inobt_maxrecs( | |
420 | struct xfs_mount *mp, | |
421 | int blocklen, | |
422 | int leaf) | |
423 | { | |
7cc95a82 | 424 | blocklen -= XFS_INOBT_BLOCK_LEN(mp); |
60197e8d CH |
425 | |
426 | if (leaf) | |
427 | return blocklen / sizeof(xfs_inobt_rec_t); | |
428 | return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t)); | |
429 | } |