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