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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 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 | 27 | #include "xfs_mount.h" |
a844f451 | 28 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
29 | #include "xfs_alloc_btree.h" |
30 | #include "xfs_ialloc_btree.h" | |
a844f451 NS |
31 | #include "xfs_dinode.h" |
32 | #include "xfs_inode.h" | |
1da177e4 | 33 | #include "xfs_btree.h" |
f5eb8e7c | 34 | #include "xfs_btree_trace.h" |
1da177e4 LT |
35 | #include "xfs_alloc.h" |
36 | #include "xfs_error.h" | |
0b1b213f | 37 | #include "xfs_trace.h" |
1da177e4 | 38 | |
1da177e4 | 39 | |
278d0ca1 CH |
40 | STATIC struct xfs_btree_cur * |
41 | xfs_allocbt_dup_cursor( | |
42 | struct xfs_btree_cur *cur) | |
43 | { | |
44 | return xfs_allocbt_init_cursor(cur->bc_mp, cur->bc_tp, | |
45 | cur->bc_private.a.agbp, cur->bc_private.a.agno, | |
46 | cur->bc_btnum); | |
47 | } | |
48 | ||
344207ce CH |
49 | STATIC void |
50 | xfs_allocbt_set_root( | |
51 | struct xfs_btree_cur *cur, | |
52 | union xfs_btree_ptr *ptr, | |
53 | int inc) | |
54 | { | |
55 | struct xfs_buf *agbp = cur->bc_private.a.agbp; | |
56 | struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp); | |
57 | xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno); | |
58 | int btnum = cur->bc_btnum; | |
a862e0fd | 59 | struct xfs_perag *pag = xfs_perag_get(cur->bc_mp, seqno); |
344207ce CH |
60 | |
61 | ASSERT(ptr->s != 0); | |
62 | ||
63 | agf->agf_roots[btnum] = ptr->s; | |
64 | be32_add_cpu(&agf->agf_levels[btnum], inc); | |
a862e0fd DC |
65 | pag->pagf_levels[btnum] += inc; |
66 | xfs_perag_put(pag); | |
344207ce CH |
67 | |
68 | xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS); | |
69 | } | |
70 | ||
f5eb8e7c CH |
71 | STATIC int |
72 | xfs_allocbt_alloc_block( | |
73 | struct xfs_btree_cur *cur, | |
74 | union xfs_btree_ptr *start, | |
75 | union xfs_btree_ptr *new, | |
76 | int length, | |
77 | int *stat) | |
78 | { | |
79 | int error; | |
80 | xfs_agblock_t bno; | |
81 | ||
82 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); | |
83 | ||
84 | /* Allocate the new block from the freelist. If we can't, give up. */ | |
85 | error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_private.a.agbp, | |
86 | &bno, 1); | |
87 | if (error) { | |
88 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); | |
89 | return error; | |
90 | } | |
91 | ||
92 | if (bno == NULLAGBLOCK) { | |
93 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
94 | *stat = 0; | |
95 | return 0; | |
96 | } | |
a870acd9 CH |
97 | if (xfs_alloc_busy_search(cur->bc_mp, cur->bc_private.a.agno, bno, 1)) |
98 | xfs_trans_set_sync(cur->bc_tp); | |
f5eb8e7c CH |
99 | |
100 | xfs_trans_agbtree_delta(cur->bc_tp, 1); | |
101 | new->s = cpu_to_be32(bno); | |
102 | ||
103 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); | |
104 | *stat = 1; | |
105 | return 0; | |
106 | } | |
107 | ||
d4b3a4b7 CH |
108 | STATIC int |
109 | xfs_allocbt_free_block( | |
110 | struct xfs_btree_cur *cur, | |
111 | struct xfs_buf *bp) | |
112 | { | |
113 | struct xfs_buf *agbp = cur->bc_private.a.agbp; | |
114 | struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp); | |
115 | xfs_agblock_t bno; | |
116 | int error; | |
117 | ||
b6e32227 | 118 | bno = xfs_daddr_to_agbno(cur->bc_mp, XFS_BUF_ADDR(bp)); |
d4b3a4b7 CH |
119 | error = xfs_alloc_put_freelist(cur->bc_tp, agbp, NULL, bno, 1); |
120 | if (error) | |
121 | return error; | |
122 | ||
123 | /* | |
124 | * Since blocks move to the free list without the coordination used in | |
125 | * xfs_bmap_finish, we can't allow block to be available for | |
126 | * reallocation and non-transaction writing (user data) until we know | |
127 | * that the transaction that moved it to the free list is permanently | |
128 | * on disk. We track the blocks by declaring these blocks as "busy"; | |
129 | * the busy list is maintained on a per-ag basis and each transaction | |
130 | * records which entries should be removed when the iclog commits to | |
131 | * disk. If a busy block is allocated, the iclog is pushed up to the | |
132 | * LSN that freed the block. | |
133 | */ | |
ed3b4d6c | 134 | xfs_alloc_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1); |
d4b3a4b7 CH |
135 | xfs_trans_agbtree_delta(cur->bc_tp, -1); |
136 | return 0; | |
137 | } | |
138 | ||
1da177e4 | 139 | /* |
278d0ca1 | 140 | * Update the longest extent in the AGF |
1da177e4 | 141 | */ |
278d0ca1 CH |
142 | STATIC void |
143 | xfs_allocbt_update_lastrec( | |
144 | struct xfs_btree_cur *cur, | |
145 | struct xfs_btree_block *block, | |
146 | union xfs_btree_rec *rec, | |
147 | int ptr, | |
148 | int reason) | |
1da177e4 | 149 | { |
278d0ca1 CH |
150 | struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); |
151 | xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno); | |
a862e0fd | 152 | struct xfs_perag *pag; |
278d0ca1 | 153 | __be32 len; |
91cca5df | 154 | int numrecs; |
1da177e4 | 155 | |
278d0ca1 | 156 | ASSERT(cur->bc_btnum == XFS_BTNUM_CNT); |
1da177e4 | 157 | |
278d0ca1 CH |
158 | switch (reason) { |
159 | case LASTREC_UPDATE: | |
1da177e4 | 160 | /* |
278d0ca1 CH |
161 | * If this is the last leaf block and it's the last record, |
162 | * then update the size of the longest extent in the AG. | |
1da177e4 | 163 | */ |
278d0ca1 CH |
164 | if (ptr != xfs_btree_get_numrecs(block)) |
165 | return; | |
166 | len = rec->alloc.ar_blockcount; | |
167 | break; | |
4b22a571 CH |
168 | case LASTREC_INSREC: |
169 | if (be32_to_cpu(rec->alloc.ar_blockcount) <= | |
170 | be32_to_cpu(agf->agf_longest)) | |
171 | return; | |
172 | len = rec->alloc.ar_blockcount; | |
91cca5df CH |
173 | break; |
174 | case LASTREC_DELREC: | |
175 | numrecs = xfs_btree_get_numrecs(block); | |
176 | if (ptr <= numrecs) | |
177 | return; | |
178 | ASSERT(ptr == numrecs + 1); | |
179 | ||
180 | if (numrecs) { | |
181 | xfs_alloc_rec_t *rrp; | |
182 | ||
136341b4 | 183 | rrp = XFS_ALLOC_REC_ADDR(cur->bc_mp, block, numrecs); |
91cca5df CH |
184 | len = rrp->ar_blockcount; |
185 | } else { | |
186 | len = 0; | |
187 | } | |
188 | ||
4b22a571 | 189 | break; |
278d0ca1 CH |
190 | default: |
191 | ASSERT(0); | |
192 | return; | |
1da177e4 | 193 | } |
561f7d17 | 194 | |
278d0ca1 | 195 | agf->agf_longest = len; |
a862e0fd DC |
196 | pag = xfs_perag_get(cur->bc_mp, seqno); |
197 | pag->pagf_longest = be32_to_cpu(len); | |
198 | xfs_perag_put(pag); | |
278d0ca1 | 199 | xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, XFS_AGF_LONGEST); |
561f7d17 CH |
200 | } |
201 | ||
91cca5df CH |
202 | STATIC int |
203 | xfs_allocbt_get_minrecs( | |
204 | struct xfs_btree_cur *cur, | |
205 | int level) | |
206 | { | |
207 | return cur->bc_mp->m_alloc_mnr[level != 0]; | |
208 | } | |
209 | ||
ce5e42db CH |
210 | STATIC int |
211 | xfs_allocbt_get_maxrecs( | |
212 | struct xfs_btree_cur *cur, | |
213 | int level) | |
214 | { | |
215 | return cur->bc_mp->m_alloc_mxr[level != 0]; | |
216 | } | |
217 | ||
fe033cc8 CH |
218 | STATIC void |
219 | xfs_allocbt_init_key_from_rec( | |
220 | union xfs_btree_key *key, | |
221 | union xfs_btree_rec *rec) | |
222 | { | |
223 | ASSERT(rec->alloc.ar_startblock != 0); | |
224 | ||
225 | key->alloc.ar_startblock = rec->alloc.ar_startblock; | |
226 | key->alloc.ar_blockcount = rec->alloc.ar_blockcount; | |
227 | } | |
228 | ||
4b22a571 CH |
229 | STATIC void |
230 | xfs_allocbt_init_rec_from_key( | |
231 | union xfs_btree_key *key, | |
232 | union xfs_btree_rec *rec) | |
233 | { | |
234 | ASSERT(key->alloc.ar_startblock != 0); | |
235 | ||
236 | rec->alloc.ar_startblock = key->alloc.ar_startblock; | |
237 | rec->alloc.ar_blockcount = key->alloc.ar_blockcount; | |
238 | } | |
239 | ||
240 | STATIC void | |
241 | xfs_allocbt_init_rec_from_cur( | |
242 | struct xfs_btree_cur *cur, | |
243 | union xfs_btree_rec *rec) | |
244 | { | |
245 | ASSERT(cur->bc_rec.a.ar_startblock != 0); | |
246 | ||
247 | rec->alloc.ar_startblock = cpu_to_be32(cur->bc_rec.a.ar_startblock); | |
248 | rec->alloc.ar_blockcount = cpu_to_be32(cur->bc_rec.a.ar_blockcount); | |
249 | } | |
250 | ||
fe033cc8 CH |
251 | STATIC void |
252 | xfs_allocbt_init_ptr_from_cur( | |
253 | struct xfs_btree_cur *cur, | |
254 | union xfs_btree_ptr *ptr) | |
255 | { | |
256 | struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp); | |
257 | ||
258 | ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno)); | |
259 | ASSERT(agf->agf_roots[cur->bc_btnum] != 0); | |
260 | ||
261 | ptr->s = agf->agf_roots[cur->bc_btnum]; | |
262 | } | |
263 | ||
264 | STATIC __int64_t | |
265 | xfs_allocbt_key_diff( | |
266 | struct xfs_btree_cur *cur, | |
267 | union xfs_btree_key *key) | |
268 | { | |
269 | xfs_alloc_rec_incore_t *rec = &cur->bc_rec.a; | |
270 | xfs_alloc_key_t *kp = &key->alloc; | |
271 | __int64_t diff; | |
272 | ||
273 | if (cur->bc_btnum == XFS_BTNUM_BNO) { | |
274 | return (__int64_t)be32_to_cpu(kp->ar_startblock) - | |
275 | rec->ar_startblock; | |
276 | } | |
277 | ||
278 | diff = (__int64_t)be32_to_cpu(kp->ar_blockcount) - rec->ar_blockcount; | |
279 | if (diff) | |
280 | return diff; | |
281 | ||
282 | return (__int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock; | |
283 | } | |
284 | ||
4a26e66e CH |
285 | #ifdef DEBUG |
286 | STATIC int | |
287 | xfs_allocbt_keys_inorder( | |
288 | struct xfs_btree_cur *cur, | |
289 | union xfs_btree_key *k1, | |
290 | union xfs_btree_key *k2) | |
291 | { | |
292 | if (cur->bc_btnum == XFS_BTNUM_BNO) { | |
293 | return be32_to_cpu(k1->alloc.ar_startblock) < | |
294 | be32_to_cpu(k2->alloc.ar_startblock); | |
295 | } else { | |
296 | return be32_to_cpu(k1->alloc.ar_blockcount) < | |
297 | be32_to_cpu(k2->alloc.ar_blockcount) || | |
298 | (k1->alloc.ar_blockcount == k2->alloc.ar_blockcount && | |
299 | be32_to_cpu(k1->alloc.ar_startblock) < | |
300 | be32_to_cpu(k2->alloc.ar_startblock)); | |
301 | } | |
302 | } | |
303 | ||
304 | STATIC int | |
305 | xfs_allocbt_recs_inorder( | |
306 | struct xfs_btree_cur *cur, | |
307 | union xfs_btree_rec *r1, | |
308 | union xfs_btree_rec *r2) | |
309 | { | |
310 | if (cur->bc_btnum == XFS_BTNUM_BNO) { | |
311 | return be32_to_cpu(r1->alloc.ar_startblock) + | |
312 | be32_to_cpu(r1->alloc.ar_blockcount) <= | |
313 | be32_to_cpu(r2->alloc.ar_startblock); | |
314 | } else { | |
315 | return be32_to_cpu(r1->alloc.ar_blockcount) < | |
316 | be32_to_cpu(r2->alloc.ar_blockcount) || | |
317 | (r1->alloc.ar_blockcount == r2->alloc.ar_blockcount && | |
318 | be32_to_cpu(r1->alloc.ar_startblock) < | |
319 | be32_to_cpu(r2->alloc.ar_startblock)); | |
320 | } | |
321 | } | |
322 | #endif /* DEBUG */ | |
323 | ||
8c4ed633 CH |
324 | #ifdef XFS_BTREE_TRACE |
325 | ktrace_t *xfs_allocbt_trace_buf; | |
326 | ||
327 | STATIC void | |
328 | xfs_allocbt_trace_enter( | |
329 | struct xfs_btree_cur *cur, | |
330 | const char *func, | |
331 | char *s, | |
332 | int type, | |
333 | int line, | |
334 | __psunsigned_t a0, | |
335 | __psunsigned_t a1, | |
336 | __psunsigned_t a2, | |
337 | __psunsigned_t a3, | |
338 | __psunsigned_t a4, | |
339 | __psunsigned_t a5, | |
340 | __psunsigned_t a6, | |
341 | __psunsigned_t a7, | |
342 | __psunsigned_t a8, | |
343 | __psunsigned_t a9, | |
344 | __psunsigned_t a10) | |
345 | { | |
346 | ktrace_enter(xfs_allocbt_trace_buf, (void *)(__psint_t)type, | |
347 | (void *)func, (void *)s, NULL, (void *)cur, | |
348 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, | |
349 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, | |
350 | (void *)a8, (void *)a9, (void *)a10); | |
351 | } | |
352 | ||
353 | STATIC void | |
354 | xfs_allocbt_trace_cursor( | |
355 | struct xfs_btree_cur *cur, | |
356 | __uint32_t *s0, | |
357 | __uint64_t *l0, | |
358 | __uint64_t *l1) | |
359 | { | |
360 | *s0 = cur->bc_private.a.agno; | |
361 | *l0 = cur->bc_rec.a.ar_startblock; | |
362 | *l1 = cur->bc_rec.a.ar_blockcount; | |
363 | } | |
364 | ||
365 | STATIC void | |
366 | xfs_allocbt_trace_key( | |
367 | struct xfs_btree_cur *cur, | |
368 | union xfs_btree_key *key, | |
369 | __uint64_t *l0, | |
370 | __uint64_t *l1) | |
371 | { | |
372 | *l0 = be32_to_cpu(key->alloc.ar_startblock); | |
373 | *l1 = be32_to_cpu(key->alloc.ar_blockcount); | |
374 | } | |
375 | ||
376 | STATIC void | |
377 | xfs_allocbt_trace_record( | |
378 | struct xfs_btree_cur *cur, | |
379 | union xfs_btree_rec *rec, | |
380 | __uint64_t *l0, | |
381 | __uint64_t *l1, | |
382 | __uint64_t *l2) | |
383 | { | |
384 | *l0 = be32_to_cpu(rec->alloc.ar_startblock); | |
385 | *l1 = be32_to_cpu(rec->alloc.ar_blockcount); | |
386 | *l2 = 0; | |
387 | } | |
388 | #endif /* XFS_BTREE_TRACE */ | |
389 | ||
561f7d17 | 390 | static const struct xfs_btree_ops xfs_allocbt_ops = { |
65f1eaea CH |
391 | .rec_len = sizeof(xfs_alloc_rec_t), |
392 | .key_len = sizeof(xfs_alloc_key_t), | |
393 | ||
561f7d17 | 394 | .dup_cursor = xfs_allocbt_dup_cursor, |
344207ce | 395 | .set_root = xfs_allocbt_set_root, |
f5eb8e7c | 396 | .alloc_block = xfs_allocbt_alloc_block, |
d4b3a4b7 | 397 | .free_block = xfs_allocbt_free_block, |
278d0ca1 | 398 | .update_lastrec = xfs_allocbt_update_lastrec, |
91cca5df | 399 | .get_minrecs = xfs_allocbt_get_minrecs, |
ce5e42db | 400 | .get_maxrecs = xfs_allocbt_get_maxrecs, |
fe033cc8 | 401 | .init_key_from_rec = xfs_allocbt_init_key_from_rec, |
4b22a571 CH |
402 | .init_rec_from_key = xfs_allocbt_init_rec_from_key, |
403 | .init_rec_from_cur = xfs_allocbt_init_rec_from_cur, | |
fe033cc8 CH |
404 | .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur, |
405 | .key_diff = xfs_allocbt_key_diff, | |
8c4ed633 | 406 | |
4a26e66e CH |
407 | #ifdef DEBUG |
408 | .keys_inorder = xfs_allocbt_keys_inorder, | |
409 | .recs_inorder = xfs_allocbt_recs_inorder, | |
410 | #endif | |
411 | ||
8c4ed633 CH |
412 | #ifdef XFS_BTREE_TRACE |
413 | .trace_enter = xfs_allocbt_trace_enter, | |
414 | .trace_cursor = xfs_allocbt_trace_cursor, | |
415 | .trace_key = xfs_allocbt_trace_key, | |
416 | .trace_record = xfs_allocbt_trace_record, | |
417 | #endif | |
561f7d17 CH |
418 | }; |
419 | ||
420 | /* | |
421 | * Allocate a new allocation btree cursor. | |
422 | */ | |
423 | struct xfs_btree_cur * /* new alloc btree cursor */ | |
424 | xfs_allocbt_init_cursor( | |
425 | struct xfs_mount *mp, /* file system mount point */ | |
426 | struct xfs_trans *tp, /* transaction pointer */ | |
427 | struct xfs_buf *agbp, /* buffer for agf structure */ | |
428 | xfs_agnumber_t agno, /* allocation group number */ | |
429 | xfs_btnum_t btnum) /* btree identifier */ | |
430 | { | |
431 | struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp); | |
432 | struct xfs_btree_cur *cur; | |
433 | ||
434 | ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT); | |
435 | ||
436 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); | |
437 | ||
438 | cur->bc_tp = tp; | |
439 | cur->bc_mp = mp; | |
440 | cur->bc_nlevels = be32_to_cpu(agf->agf_levels[btnum]); | |
441 | cur->bc_btnum = btnum; | |
442 | cur->bc_blocklog = mp->m_sb.sb_blocklog; | |
443 | ||
444 | cur->bc_ops = &xfs_allocbt_ops; | |
278d0ca1 CH |
445 | if (btnum == XFS_BTNUM_CNT) |
446 | cur->bc_flags = XFS_BTREE_LASTREC_UPDATE; | |
561f7d17 CH |
447 | |
448 | cur->bc_private.a.agbp = agbp; | |
449 | cur->bc_private.a.agno = agno; | |
450 | ||
451 | return cur; | |
452 | } | |
60197e8d CH |
453 | |
454 | /* | |
455 | * Calculate number of records in an alloc btree block. | |
456 | */ | |
457 | int | |
458 | xfs_allocbt_maxrecs( | |
459 | struct xfs_mount *mp, | |
460 | int blocklen, | |
461 | int leaf) | |
462 | { | |
7cc95a82 | 463 | blocklen -= XFS_ALLOC_BLOCK_LEN(mp); |
60197e8d CH |
464 | |
465 | if (leaf) | |
466 | return blocklen / sizeof(xfs_alloc_rec_t); | |
467 | return blocklen / (sizeof(xfs_alloc_key_t) + sizeof(xfs_alloc_ptr_t)); | |
468 | } |