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