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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * suballoc.c | |
5 | * | |
6 | * metadata alloc and free | |
7 | * Inspired by ext3 block groups. | |
8 | * | |
9 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public | |
13 | * License as published by the Free Software Foundation; either | |
14 | * version 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public | |
22 | * License along with this program; if not, write to the | |
23 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | * Boston, MA 021110-1307, USA. | |
25 | */ | |
26 | ||
27 | #include <linux/fs.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/highmem.h> | |
31 | ||
32 | #define MLOG_MASK_PREFIX ML_DISK_ALLOC | |
33 | #include <cluster/masklog.h> | |
34 | ||
35 | #include "ocfs2.h" | |
36 | ||
37 | #include "alloc.h" | |
38 | #include "dlmglue.h" | |
39 | #include "inode.h" | |
40 | #include "journal.h" | |
41 | #include "localalloc.h" | |
42 | #include "suballoc.h" | |
43 | #include "super.h" | |
44 | #include "sysfile.h" | |
45 | #include "uptodate.h" | |
46 | ||
47 | #include "buffer_head_io.h" | |
48 | ||
ffda89a3 TM |
49 | #define NOT_ALLOC_NEW_GROUP 0 |
50 | #define ALLOC_NEW_GROUP 1 | |
51 | ||
ccd979bd MF |
52 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); |
53 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); | |
54 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); | |
1fabe148 | 55 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
56 | struct inode *alloc_inode, |
57 | struct buffer_head *bg_bh, | |
58 | u64 group_blkno, | |
59 | u16 my_chain, | |
60 | struct ocfs2_chain_list *cl); | |
61 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
62 | struct inode *alloc_inode, | |
63 | struct buffer_head *bh); | |
64 | ||
ccd979bd MF |
65 | static int ocfs2_cluster_group_search(struct inode *inode, |
66 | struct buffer_head *group_bh, | |
67 | u32 bits_wanted, u32 min_bits, | |
68 | u16 *bit_off, u16 *bits_found); | |
69 | static int ocfs2_block_group_search(struct inode *inode, | |
70 | struct buffer_head *group_bh, | |
71 | u32 bits_wanted, u32 min_bits, | |
72 | u16 *bit_off, u16 *bits_found); | |
ccd979bd MF |
73 | static int ocfs2_claim_suballoc_bits(struct ocfs2_super *osb, |
74 | struct ocfs2_alloc_context *ac, | |
1fabe148 | 75 | handle_t *handle, |
ccd979bd MF |
76 | u32 bits_wanted, |
77 | u32 min_bits, | |
78 | u16 *bit_off, | |
79 | unsigned int *num_bits, | |
80 | u64 *bg_blkno); | |
81 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
82 | int nr); | |
1fabe148 | 83 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
84 | struct inode *alloc_inode, |
85 | struct ocfs2_group_desc *bg, | |
86 | struct buffer_head *group_bh, | |
87 | unsigned int bit_off, | |
88 | unsigned int num_bits); | |
1fabe148 | 89 | static inline int ocfs2_block_group_clear_bits(handle_t *handle, |
ccd979bd MF |
90 | struct inode *alloc_inode, |
91 | struct ocfs2_group_desc *bg, | |
92 | struct buffer_head *group_bh, | |
93 | unsigned int bit_off, | |
94 | unsigned int num_bits); | |
95 | ||
1fabe148 | 96 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
97 | struct inode *alloc_inode, |
98 | struct buffer_head *fe_bh, | |
99 | struct buffer_head *bg_bh, | |
100 | struct buffer_head *prev_bg_bh, | |
101 | u16 chain); | |
102 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
103 | u32 wanted); | |
ccd979bd MF |
104 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
105 | u64 bg_blkno, | |
106 | u16 bg_bit_off); | |
ccd979bd MF |
107 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
108 | u64 data_blkno, | |
109 | u64 *bg_blkno, | |
110 | u16 *bg_bit_off); | |
111 | ||
112 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) | |
113 | { | |
da5cbf2f MF |
114 | struct inode *inode = ac->ac_inode; |
115 | ||
116 | if (inode) { | |
117 | if (ac->ac_which != OCFS2_AC_USE_LOCAL) | |
e63aecb6 | 118 | ocfs2_inode_unlock(inode, 1); |
da5cbf2f MF |
119 | |
120 | mutex_unlock(&inode->i_mutex); | |
121 | ||
122 | iput(inode); | |
123 | } | |
ccd979bd MF |
124 | if (ac->ac_bh) |
125 | brelse(ac->ac_bh); | |
126 | kfree(ac); | |
127 | } | |
128 | ||
129 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) | |
130 | { | |
131 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); | |
132 | } | |
133 | ||
7bf72ede | 134 | /* somewhat more expensive than our other checks, so use sparingly. */ |
d659072f TM |
135 | int ocfs2_check_group_descriptor(struct super_block *sb, |
136 | struct ocfs2_dinode *di, | |
137 | struct ocfs2_group_desc *gd) | |
7bf72ede MF |
138 | { |
139 | unsigned int max_bits; | |
140 | ||
141 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { | |
142 | OCFS2_RO_ON_INVALID_GROUP_DESC(sb, gd); | |
143 | return -EIO; | |
144 | } | |
145 | ||
146 | if (di->i_blkno != gd->bg_parent_dinode) { | |
147 | ocfs2_error(sb, "Group descriptor # %llu has bad parent " | |
148 | "pointer (%llu, expected %llu)", | |
149 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
150 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), | |
151 | (unsigned long long)le64_to_cpu(di->i_blkno)); | |
152 | return -EIO; | |
153 | } | |
154 | ||
155 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); | |
156 | if (le16_to_cpu(gd->bg_bits) > max_bits) { | |
157 | ocfs2_error(sb, "Group descriptor # %llu has bit count of %u", | |
158 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
159 | le16_to_cpu(gd->bg_bits)); | |
160 | return -EIO; | |
161 | } | |
162 | ||
163 | if (le16_to_cpu(gd->bg_chain) >= | |
164 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) { | |
165 | ocfs2_error(sb, "Group descriptor # %llu has bad chain %u", | |
166 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
167 | le16_to_cpu(gd->bg_chain)); | |
168 | return -EIO; | |
169 | } | |
170 | ||
171 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { | |
172 | ocfs2_error(sb, "Group descriptor # %llu has bit count %u but " | |
173 | "claims that %u are free", | |
174 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
175 | le16_to_cpu(gd->bg_bits), | |
176 | le16_to_cpu(gd->bg_free_bits_count)); | |
177 | return -EIO; | |
178 | } | |
179 | ||
180 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { | |
181 | ocfs2_error(sb, "Group descriptor # %llu has bit count %u but " | |
182 | "max bitmap bits of %u", | |
183 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
184 | le16_to_cpu(gd->bg_bits), | |
185 | 8 * le16_to_cpu(gd->bg_size)); | |
186 | return -EIO; | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
1fabe148 | 192 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
193 | struct inode *alloc_inode, |
194 | struct buffer_head *bg_bh, | |
195 | u64 group_blkno, | |
196 | u16 my_chain, | |
197 | struct ocfs2_chain_list *cl) | |
198 | { | |
199 | int status = 0; | |
200 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
201 | struct super_block * sb = alloc_inode->i_sb; | |
202 | ||
203 | mlog_entry_void(); | |
204 | ||
205 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { | |
b0697053 MF |
206 | ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " |
207 | "b_blocknr (%llu)", | |
208 | (unsigned long long)group_blkno, | |
ccd979bd MF |
209 | (unsigned long long) bg_bh->b_blocknr); |
210 | status = -EIO; | |
211 | goto bail; | |
212 | } | |
213 | ||
214 | status = ocfs2_journal_access(handle, | |
215 | alloc_inode, | |
216 | bg_bh, | |
217 | OCFS2_JOURNAL_ACCESS_CREATE); | |
218 | if (status < 0) { | |
219 | mlog_errno(status); | |
220 | goto bail; | |
221 | } | |
222 | ||
223 | memset(bg, 0, sb->s_blocksize); | |
224 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); | |
225 | bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); | |
226 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb)); | |
227 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); | |
228 | bg->bg_chain = cpu_to_le16(my_chain); | |
229 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; | |
230 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); | |
231 | bg->bg_blkno = cpu_to_le64(group_blkno); | |
232 | /* set the 1st bit in the bitmap to account for the descriptor block */ | |
233 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); | |
234 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); | |
235 | ||
236 | status = ocfs2_journal_dirty(handle, bg_bh); | |
237 | if (status < 0) | |
238 | mlog_errno(status); | |
239 | ||
240 | /* There is no need to zero out or otherwise initialize the | |
241 | * other blocks in a group - All valid FS metadata in a block | |
242 | * group stores the superblock fs_generation value at | |
243 | * allocation time. */ | |
244 | ||
245 | bail: | |
246 | mlog_exit(status); | |
247 | return status; | |
248 | } | |
249 | ||
250 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) | |
251 | { | |
252 | u16 curr, best; | |
253 | ||
254 | best = curr = 0; | |
255 | while (curr < le16_to_cpu(cl->cl_count)) { | |
256 | if (le32_to_cpu(cl->cl_recs[best].c_total) > | |
257 | le32_to_cpu(cl->cl_recs[curr].c_total)) | |
258 | best = curr; | |
259 | curr++; | |
260 | } | |
261 | return best; | |
262 | } | |
263 | ||
264 | /* | |
265 | * We expect the block group allocator to already be locked. | |
266 | */ | |
267 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
268 | struct inode *alloc_inode, | |
269 | struct buffer_head *bh) | |
270 | { | |
271 | int status, credits; | |
272 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; | |
273 | struct ocfs2_chain_list *cl; | |
274 | struct ocfs2_alloc_context *ac = NULL; | |
1fabe148 | 275 | handle_t *handle = NULL; |
ccd979bd MF |
276 | u32 bit_off, num_bits; |
277 | u16 alloc_rec; | |
278 | u64 bg_blkno; | |
279 | struct buffer_head *bg_bh = NULL; | |
280 | struct ocfs2_group_desc *bg; | |
281 | ||
282 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); | |
283 | ||
284 | mlog_entry_void(); | |
285 | ||
ccd979bd MF |
286 | cl = &fe->id2.i_chain; |
287 | status = ocfs2_reserve_clusters(osb, | |
ccd979bd MF |
288 | le16_to_cpu(cl->cl_cpg), |
289 | &ac); | |
290 | if (status < 0) { | |
291 | if (status != -ENOSPC) | |
292 | mlog_errno(status); | |
293 | goto bail; | |
294 | } | |
295 | ||
296 | credits = ocfs2_calc_group_alloc_credits(osb->sb, | |
297 | le16_to_cpu(cl->cl_cpg)); | |
65eff9cc | 298 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
299 | if (IS_ERR(handle)) { |
300 | status = PTR_ERR(handle); | |
301 | handle = NULL; | |
302 | mlog_errno(status); | |
303 | goto bail; | |
304 | } | |
305 | ||
306 | status = ocfs2_claim_clusters(osb, | |
307 | handle, | |
308 | ac, | |
309 | le16_to_cpu(cl->cl_cpg), | |
310 | &bit_off, | |
311 | &num_bits); | |
312 | if (status < 0) { | |
313 | if (status != -ENOSPC) | |
314 | mlog_errno(status); | |
315 | goto bail; | |
316 | } | |
317 | ||
318 | alloc_rec = ocfs2_find_smallest_chain(cl); | |
319 | ||
320 | /* setup the group */ | |
321 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
b0697053 MF |
322 | mlog(0, "new descriptor, record %u, at block %llu\n", |
323 | alloc_rec, (unsigned long long)bg_blkno); | |
ccd979bd MF |
324 | |
325 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
326 | if (!bg_bh) { | |
327 | status = -EIO; | |
328 | mlog_errno(status); | |
329 | goto bail; | |
330 | } | |
331 | ocfs2_set_new_buffer_uptodate(alloc_inode, bg_bh); | |
332 | ||
333 | status = ocfs2_block_group_fill(handle, | |
334 | alloc_inode, | |
335 | bg_bh, | |
336 | bg_blkno, | |
337 | alloc_rec, | |
338 | cl); | |
339 | if (status < 0) { | |
340 | mlog_errno(status); | |
341 | goto bail; | |
342 | } | |
343 | ||
344 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
345 | ||
346 | status = ocfs2_journal_access(handle, alloc_inode, | |
347 | bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
348 | if (status < 0) { | |
349 | mlog_errno(status); | |
350 | goto bail; | |
351 | } | |
352 | ||
353 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, | |
354 | le16_to_cpu(bg->bg_free_bits_count)); | |
355 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, le16_to_cpu(bg->bg_bits)); | |
356 | cl->cl_recs[alloc_rec].c_blkno = cpu_to_le64(bg_blkno); | |
357 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) | |
358 | le16_add_cpu(&cl->cl_next_free_rec, 1); | |
359 | ||
360 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - | |
361 | le16_to_cpu(bg->bg_free_bits_count)); | |
362 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); | |
363 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); | |
364 | ||
365 | status = ocfs2_journal_dirty(handle, bh); | |
366 | if (status < 0) { | |
367 | mlog_errno(status); | |
368 | goto bail; | |
369 | } | |
370 | ||
371 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); | |
372 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
373 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, | |
374 | le32_to_cpu(fe->i_clusters))); | |
375 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); | |
376 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); | |
8110b073 | 377 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
ccd979bd MF |
378 | |
379 | status = 0; | |
380 | bail: | |
381 | if (handle) | |
02dc1af4 | 382 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
383 | |
384 | if (ac) | |
385 | ocfs2_free_alloc_context(ac); | |
386 | ||
387 | if (bg_bh) | |
388 | brelse(bg_bh); | |
389 | ||
390 | mlog_exit(status); | |
391 | return status; | |
392 | } | |
393 | ||
394 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, | |
da5cbf2f MF |
395 | struct ocfs2_alloc_context *ac, |
396 | int type, | |
ffda89a3 TM |
397 | u32 slot, |
398 | int alloc_new_group) | |
ccd979bd MF |
399 | { |
400 | int status; | |
401 | u32 bits_wanted = ac->ac_bits_wanted; | |
da5cbf2f | 402 | struct inode *alloc_inode; |
ccd979bd | 403 | struct buffer_head *bh = NULL; |
ccd979bd MF |
404 | struct ocfs2_dinode *fe; |
405 | u32 free_bits; | |
406 | ||
407 | mlog_entry_void(); | |
408 | ||
da5cbf2f MF |
409 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
410 | if (!alloc_inode) { | |
411 | mlog_errno(-EINVAL); | |
412 | return -EINVAL; | |
413 | } | |
ccd979bd | 414 | |
da5cbf2f MF |
415 | mutex_lock(&alloc_inode->i_mutex); |
416 | ||
e63aecb6 | 417 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
ccd979bd | 418 | if (status < 0) { |
da5cbf2f MF |
419 | mutex_unlock(&alloc_inode->i_mutex); |
420 | iput(alloc_inode); | |
421 | ||
ccd979bd | 422 | mlog_errno(status); |
da5cbf2f | 423 | return status; |
ccd979bd MF |
424 | } |
425 | ||
da5cbf2f MF |
426 | ac->ac_inode = alloc_inode; |
427 | ||
ccd979bd MF |
428 | fe = (struct ocfs2_dinode *) bh->b_data; |
429 | if (!OCFS2_IS_VALID_DINODE(fe)) { | |
430 | OCFS2_RO_ON_INVALID_DINODE(alloc_inode->i_sb, fe); | |
431 | status = -EIO; | |
432 | goto bail; | |
433 | } | |
434 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { | |
b0697053 MF |
435 | ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", |
436 | (unsigned long long)le64_to_cpu(fe->i_blkno)); | |
ccd979bd MF |
437 | status = -EIO; |
438 | goto bail; | |
439 | } | |
440 | ||
441 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - | |
442 | le32_to_cpu(fe->id1.bitmap1.i_used); | |
443 | ||
444 | if (bits_wanted > free_bits) { | |
445 | /* cluster bitmap never grows */ | |
446 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { | |
447 | mlog(0, "Disk Full: wanted=%u, free_bits=%u\n", | |
448 | bits_wanted, free_bits); | |
449 | status = -ENOSPC; | |
450 | goto bail; | |
451 | } | |
452 | ||
ffda89a3 TM |
453 | if (alloc_new_group != ALLOC_NEW_GROUP) { |
454 | mlog(0, "Alloc File %u Full: wanted=%u, free_bits=%u, " | |
455 | "and we don't alloc a new group for it.\n", | |
456 | slot, bits_wanted, free_bits); | |
457 | status = -ENOSPC; | |
458 | goto bail; | |
459 | } | |
460 | ||
ccd979bd MF |
461 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh); |
462 | if (status < 0) { | |
463 | if (status != -ENOSPC) | |
464 | mlog_errno(status); | |
465 | goto bail; | |
466 | } | |
467 | atomic_inc(&osb->alloc_stats.bg_extends); | |
468 | ||
469 | /* You should never ask for this much metadata */ | |
470 | BUG_ON(bits_wanted > | |
471 | (le32_to_cpu(fe->id1.bitmap1.i_total) | |
472 | - le32_to_cpu(fe->id1.bitmap1.i_used))); | |
473 | } | |
474 | ||
475 | get_bh(bh); | |
476 | ac->ac_bh = bh; | |
477 | bail: | |
478 | if (bh) | |
479 | brelse(bh); | |
480 | ||
481 | mlog_exit(status); | |
482 | return status; | |
483 | } | |
484 | ||
485 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, | |
ccd979bd MF |
486 | struct ocfs2_dinode *fe, |
487 | struct ocfs2_alloc_context **ac) | |
488 | { | |
489 | int status; | |
da5cbf2f | 490 | u32 slot; |
ccd979bd | 491 | |
cd861280 | 492 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
493 | if (!(*ac)) { |
494 | status = -ENOMEM; | |
495 | mlog_errno(status); | |
496 | goto bail; | |
497 | } | |
498 | ||
499 | (*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(fe); | |
ccd979bd | 500 | (*ac)->ac_which = OCFS2_AC_USE_META; |
da5cbf2f | 501 | slot = osb->slot_num; |
ccd979bd MF |
502 | (*ac)->ac_group_search = ocfs2_block_group_search; |
503 | ||
da5cbf2f | 504 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
ffda89a3 TM |
505 | EXTENT_ALLOC_SYSTEM_INODE, |
506 | slot, ALLOC_NEW_GROUP); | |
ccd979bd MF |
507 | if (status < 0) { |
508 | if (status != -ENOSPC) | |
509 | mlog_errno(status); | |
510 | goto bail; | |
511 | } | |
512 | ||
513 | status = 0; | |
514 | bail: | |
515 | if ((status < 0) && *ac) { | |
516 | ocfs2_free_alloc_context(*ac); | |
517 | *ac = NULL; | |
518 | } | |
519 | ||
ccd979bd MF |
520 | mlog_exit(status); |
521 | return status; | |
522 | } | |
523 | ||
524 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, | |
ccd979bd MF |
525 | struct ocfs2_alloc_context **ac) |
526 | { | |
527 | int status; | |
ccd979bd | 528 | |
cd861280 | 529 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
530 | if (!(*ac)) { |
531 | status = -ENOMEM; | |
532 | mlog_errno(status); | |
533 | goto bail; | |
534 | } | |
535 | ||
536 | (*ac)->ac_bits_wanted = 1; | |
ccd979bd MF |
537 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
538 | ||
ccd979bd MF |
539 | (*ac)->ac_group_search = ocfs2_block_group_search; |
540 | ||
da5cbf2f MF |
541 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
542 | INODE_ALLOC_SYSTEM_INODE, | |
ffda89a3 | 543 | osb->slot_num, ALLOC_NEW_GROUP); |
ccd979bd MF |
544 | if (status < 0) { |
545 | if (status != -ENOSPC) | |
546 | mlog_errno(status); | |
547 | goto bail; | |
548 | } | |
549 | ||
550 | status = 0; | |
551 | bail: | |
552 | if ((status < 0) && *ac) { | |
553 | ocfs2_free_alloc_context(*ac); | |
554 | *ac = NULL; | |
555 | } | |
556 | ||
ccd979bd MF |
557 | mlog_exit(status); |
558 | return status; | |
559 | } | |
560 | ||
561 | /* local alloc code has to do the same thing, so rather than do this | |
562 | * twice.. */ | |
563 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
564 | struct ocfs2_alloc_context *ac) | |
565 | { | |
566 | int status; | |
567 | ||
ccd979bd MF |
568 | ac->ac_which = OCFS2_AC_USE_MAIN; |
569 | ac->ac_group_search = ocfs2_cluster_group_search; | |
570 | ||
da5cbf2f MF |
571 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
572 | GLOBAL_BITMAP_SYSTEM_INODE, | |
ffda89a3 TM |
573 | OCFS2_INVALID_SLOT, |
574 | ALLOC_NEW_GROUP); | |
da5cbf2f | 575 | if (status < 0 && status != -ENOSPC) { |
ccd979bd | 576 | mlog_errno(status); |
da5cbf2f MF |
577 | goto bail; |
578 | } | |
579 | ||
ccd979bd MF |
580 | bail: |
581 | return status; | |
582 | } | |
583 | ||
584 | /* Callers don't need to care which bitmap (local alloc or main) to | |
585 | * use so we figure it out for them, but unfortunately this clutters | |
586 | * things a bit. */ | |
587 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, | |
ccd979bd MF |
588 | u32 bits_wanted, |
589 | struct ocfs2_alloc_context **ac) | |
590 | { | |
591 | int status; | |
592 | ||
593 | mlog_entry_void(); | |
594 | ||
cd861280 | 595 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
596 | if (!(*ac)) { |
597 | status = -ENOMEM; | |
598 | mlog_errno(status); | |
599 | goto bail; | |
600 | } | |
601 | ||
602 | (*ac)->ac_bits_wanted = bits_wanted; | |
ccd979bd MF |
603 | |
604 | status = -ENOSPC; | |
605 | if (ocfs2_alloc_should_use_local(osb, bits_wanted)) { | |
606 | status = ocfs2_reserve_local_alloc_bits(osb, | |
ccd979bd MF |
607 | bits_wanted, |
608 | *ac); | |
609 | if ((status < 0) && (status != -ENOSPC)) { | |
610 | mlog_errno(status); | |
611 | goto bail; | |
612 | } else if (status == -ENOSPC) { | |
613 | /* reserve_local_bits will return enospc with | |
614 | * the local alloc inode still locked, so we | |
615 | * can change this safely here. */ | |
616 | mlog(0, "Disabling local alloc\n"); | |
617 | /* We set to OCFS2_LA_DISABLED so that umount | |
618 | * can clean up what's left of the local | |
619 | * allocation */ | |
620 | osb->local_alloc_state = OCFS2_LA_DISABLED; | |
621 | } | |
622 | } | |
623 | ||
624 | if (status == -ENOSPC) { | |
625 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); | |
626 | if (status < 0) { | |
627 | if (status != -ENOSPC) | |
628 | mlog_errno(status); | |
629 | goto bail; | |
630 | } | |
631 | } | |
632 | ||
633 | status = 0; | |
634 | bail: | |
635 | if ((status < 0) && *ac) { | |
636 | ocfs2_free_alloc_context(*ac); | |
637 | *ac = NULL; | |
638 | } | |
639 | ||
640 | mlog_exit(status); | |
641 | return status; | |
642 | } | |
643 | ||
644 | /* | |
645 | * More or less lifted from ext3. I'll leave their description below: | |
646 | * | |
647 | * "For ext3 allocations, we must not reuse any blocks which are | |
648 | * allocated in the bitmap buffer's "last committed data" copy. This | |
649 | * prevents deletes from freeing up the page for reuse until we have | |
650 | * committed the delete transaction. | |
651 | * | |
652 | * If we didn't do this, then deleting something and reallocating it as | |
653 | * data would allow the old block to be overwritten before the | |
654 | * transaction committed (because we force data to disk before commit). | |
655 | * This would lead to corruption if we crashed between overwriting the | |
656 | * data and committing the delete. | |
657 | * | |
658 | * @@@ We may want to make this allocation behaviour conditional on | |
659 | * data-writes at some point, and disable it for metadata allocations or | |
660 | * sync-data inodes." | |
661 | * | |
662 | * Note: OCFS2 already does this differently for metadata vs data | |
c78bad11 | 663 | * allocations, as those bitmaps are separate and undo access is never |
ccd979bd MF |
664 | * called on a metadata group descriptor. |
665 | */ | |
666 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
667 | int nr) | |
668 | { | |
669 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
670 | ||
671 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) | |
672 | return 0; | |
673 | if (!buffer_jbd(bg_bh) || !bh2jh(bg_bh)->b_committed_data) | |
674 | return 1; | |
675 | ||
676 | bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; | |
677 | return !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); | |
678 | } | |
679 | ||
680 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, | |
681 | struct buffer_head *bg_bh, | |
682 | unsigned int bits_wanted, | |
7bf72ede | 683 | unsigned int total_bits, |
ccd979bd MF |
684 | u16 *bit_off, |
685 | u16 *bits_found) | |
686 | { | |
687 | void *bitmap; | |
688 | u16 best_offset, best_size; | |
689 | int offset, start, found, status = 0; | |
690 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
691 | ||
692 | if (!OCFS2_IS_VALID_GROUP_DESC(bg)) { | |
693 | OCFS2_RO_ON_INVALID_GROUP_DESC(osb->sb, bg); | |
694 | return -EIO; | |
695 | } | |
696 | ||
697 | found = start = best_offset = best_size = 0; | |
698 | bitmap = bg->bg_bitmap; | |
699 | ||
7bf72ede MF |
700 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
701 | if (offset == total_bits) | |
ccd979bd MF |
702 | break; |
703 | ||
704 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { | |
705 | /* We found a zero, but we can't use it as it | |
706 | * hasn't been put to disk yet! */ | |
707 | found = 0; | |
708 | start = offset + 1; | |
709 | } else if (offset == start) { | |
710 | /* we found a zero */ | |
711 | found++; | |
712 | /* move start to the next bit to test */ | |
713 | start++; | |
714 | } else { | |
715 | /* got a zero after some ones */ | |
716 | found = 1; | |
717 | start = offset + 1; | |
718 | } | |
719 | if (found > best_size) { | |
720 | best_size = found; | |
721 | best_offset = start - found; | |
722 | } | |
723 | /* we got everything we needed */ | |
724 | if (found == bits_wanted) { | |
725 | /* mlog(0, "Found it all!\n"); */ | |
726 | break; | |
727 | } | |
728 | } | |
729 | ||
730 | /* XXX: I think the first clause is equivalent to the second | |
731 | * - jlbec */ | |
732 | if (found == bits_wanted) { | |
733 | *bit_off = start - found; | |
734 | *bits_found = found; | |
735 | } else if (best_size) { | |
736 | *bit_off = best_offset; | |
737 | *bits_found = best_size; | |
738 | } else { | |
739 | status = -ENOSPC; | |
740 | /* No error log here -- see the comment above | |
741 | * ocfs2_test_bg_bit_allocatable */ | |
742 | } | |
743 | ||
744 | return status; | |
745 | } | |
746 | ||
1fabe148 | 747 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
748 | struct inode *alloc_inode, |
749 | struct ocfs2_group_desc *bg, | |
750 | struct buffer_head *group_bh, | |
751 | unsigned int bit_off, | |
752 | unsigned int num_bits) | |
753 | { | |
754 | int status; | |
755 | void *bitmap = bg->bg_bitmap; | |
756 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
757 | ||
758 | mlog_entry_void(); | |
759 | ||
760 | if (!OCFS2_IS_VALID_GROUP_DESC(bg)) { | |
761 | OCFS2_RO_ON_INVALID_GROUP_DESC(alloc_inode->i_sb, bg); | |
762 | status = -EIO; | |
763 | goto bail; | |
764 | } | |
765 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); | |
766 | ||
767 | mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, | |
768 | num_bits); | |
769 | ||
770 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
771 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
772 | ||
773 | status = ocfs2_journal_access(handle, | |
774 | alloc_inode, | |
775 | group_bh, | |
776 | journal_type); | |
777 | if (status < 0) { | |
778 | mlog_errno(status); | |
779 | goto bail; | |
780 | } | |
781 | ||
782 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); | |
783 | ||
784 | while(num_bits--) | |
785 | ocfs2_set_bit(bit_off++, bitmap); | |
786 | ||
787 | status = ocfs2_journal_dirty(handle, | |
788 | group_bh); | |
789 | if (status < 0) { | |
790 | mlog_errno(status); | |
791 | goto bail; | |
792 | } | |
793 | ||
794 | bail: | |
795 | mlog_exit(status); | |
796 | return status; | |
797 | } | |
798 | ||
799 | /* find the one with the most empty bits */ | |
800 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) | |
801 | { | |
802 | u16 curr, best; | |
803 | ||
804 | BUG_ON(!cl->cl_next_free_rec); | |
805 | ||
806 | best = curr = 0; | |
807 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { | |
808 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > | |
809 | le32_to_cpu(cl->cl_recs[best].c_free)) | |
810 | best = curr; | |
811 | curr++; | |
812 | } | |
813 | ||
814 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); | |
815 | return best; | |
816 | } | |
817 | ||
1fabe148 | 818 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
819 | struct inode *alloc_inode, |
820 | struct buffer_head *fe_bh, | |
821 | struct buffer_head *bg_bh, | |
822 | struct buffer_head *prev_bg_bh, | |
823 | u16 chain) | |
824 | { | |
825 | int status; | |
826 | /* there is a really tiny chance the journal calls could fail, | |
827 | * but we wouldn't want inconsistent blocks in *any* case. */ | |
828 | u64 fe_ptr, bg_ptr, prev_bg_ptr; | |
829 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
830 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
831 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; | |
832 | ||
833 | if (!OCFS2_IS_VALID_DINODE(fe)) { | |
834 | OCFS2_RO_ON_INVALID_DINODE(alloc_inode->i_sb, fe); | |
835 | status = -EIO; | |
836 | goto out; | |
837 | } | |
838 | if (!OCFS2_IS_VALID_GROUP_DESC(bg)) { | |
839 | OCFS2_RO_ON_INVALID_GROUP_DESC(alloc_inode->i_sb, bg); | |
840 | status = -EIO; | |
841 | goto out; | |
842 | } | |
843 | if (!OCFS2_IS_VALID_GROUP_DESC(prev_bg)) { | |
844 | OCFS2_RO_ON_INVALID_GROUP_DESC(alloc_inode->i_sb, prev_bg); | |
845 | status = -EIO; | |
846 | goto out; | |
847 | } | |
848 | ||
b0697053 | 849 | mlog(0, "Suballoc %llu, chain %u, move group %llu to top, prev = %llu\n", |
1ca1a111 MF |
850 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, |
851 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
852 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); | |
ccd979bd MF |
853 | |
854 | fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno); | |
855 | bg_ptr = le64_to_cpu(bg->bg_next_group); | |
856 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); | |
857 | ||
858 | status = ocfs2_journal_access(handle, alloc_inode, prev_bg_bh, | |
859 | OCFS2_JOURNAL_ACCESS_WRITE); | |
860 | if (status < 0) { | |
861 | mlog_errno(status); | |
862 | goto out_rollback; | |
863 | } | |
864 | ||
865 | prev_bg->bg_next_group = bg->bg_next_group; | |
866 | ||
867 | status = ocfs2_journal_dirty(handle, prev_bg_bh); | |
868 | if (status < 0) { | |
869 | mlog_errno(status); | |
870 | goto out_rollback; | |
871 | } | |
872 | ||
873 | status = ocfs2_journal_access(handle, alloc_inode, bg_bh, | |
874 | OCFS2_JOURNAL_ACCESS_WRITE); | |
875 | if (status < 0) { | |
876 | mlog_errno(status); | |
877 | goto out_rollback; | |
878 | } | |
879 | ||
880 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; | |
881 | ||
882 | status = ocfs2_journal_dirty(handle, bg_bh); | |
883 | if (status < 0) { | |
884 | mlog_errno(status); | |
885 | goto out_rollback; | |
886 | } | |
887 | ||
888 | status = ocfs2_journal_access(handle, alloc_inode, fe_bh, | |
889 | OCFS2_JOURNAL_ACCESS_WRITE); | |
890 | if (status < 0) { | |
891 | mlog_errno(status); | |
892 | goto out_rollback; | |
893 | } | |
894 | ||
895 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; | |
896 | ||
897 | status = ocfs2_journal_dirty(handle, fe_bh); | |
898 | if (status < 0) { | |
899 | mlog_errno(status); | |
900 | goto out_rollback; | |
901 | } | |
902 | ||
903 | status = 0; | |
904 | out_rollback: | |
905 | if (status < 0) { | |
906 | fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr); | |
907 | bg->bg_next_group = cpu_to_le64(bg_ptr); | |
908 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); | |
909 | } | |
910 | out: | |
911 | mlog_exit(status); | |
912 | return status; | |
913 | } | |
914 | ||
915 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
916 | u32 wanted) | |
917 | { | |
918 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; | |
919 | } | |
920 | ||
921 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 | |
922 | * value on error. */ | |
923 | static int ocfs2_cluster_group_search(struct inode *inode, | |
924 | struct buffer_head *group_bh, | |
925 | u32 bits_wanted, u32 min_bits, | |
926 | u16 *bit_off, u16 *bits_found) | |
927 | { | |
928 | int search = -ENOSPC; | |
929 | int ret; | |
7bf72ede | 930 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
ccd979bd | 931 | u16 tmp_off, tmp_found; |
7bf72ede | 932 | unsigned int max_bits, gd_cluster_off; |
ccd979bd MF |
933 | |
934 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
935 | ||
7bf72ede MF |
936 | if (gd->bg_free_bits_count) { |
937 | max_bits = le16_to_cpu(gd->bg_bits); | |
938 | ||
939 | /* Tail groups in cluster bitmaps which aren't cpg | |
940 | * aligned are prone to partial extention by a failed | |
941 | * fs resize. If the file system resize never got to | |
942 | * update the dinode cluster count, then we don't want | |
943 | * to trust any clusters past it, regardless of what | |
944 | * the group descriptor says. */ | |
945 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, | |
946 | le64_to_cpu(gd->bg_blkno)); | |
947 | if ((gd_cluster_off + max_bits) > | |
948 | OCFS2_I(inode)->ip_clusters) { | |
949 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; | |
950 | mlog(0, "Desc %llu, bg_bits %u, clusters %u, use %u\n", | |
951 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
952 | le16_to_cpu(gd->bg_bits), | |
953 | OCFS2_I(inode)->ip_clusters, max_bits); | |
954 | } | |
955 | ||
ccd979bd MF |
956 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
957 | group_bh, bits_wanted, | |
7bf72ede | 958 | max_bits, |
ccd979bd MF |
959 | &tmp_off, &tmp_found); |
960 | if (ret) | |
961 | return ret; | |
962 | ||
963 | /* ocfs2_block_group_find_clear_bits() might | |
964 | * return success, but we still want to return | |
965 | * -ENOSPC unless it found the minimum number | |
966 | * of bits. */ | |
967 | if (min_bits <= tmp_found) { | |
968 | *bit_off = tmp_off; | |
969 | *bits_found = tmp_found; | |
970 | search = 0; /* success */ | |
971 | } | |
972 | } | |
973 | ||
974 | return search; | |
975 | } | |
976 | ||
977 | static int ocfs2_block_group_search(struct inode *inode, | |
978 | struct buffer_head *group_bh, | |
979 | u32 bits_wanted, u32 min_bits, | |
980 | u16 *bit_off, u16 *bits_found) | |
981 | { | |
982 | int ret = -ENOSPC; | |
983 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
984 | ||
985 | BUG_ON(min_bits != 1); | |
986 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); | |
987 | ||
988 | if (bg->bg_free_bits_count) | |
989 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), | |
990 | group_bh, bits_wanted, | |
7bf72ede | 991 | le16_to_cpu(bg->bg_bits), |
ccd979bd MF |
992 | bit_off, bits_found); |
993 | ||
994 | return ret; | |
995 | } | |
996 | ||
883d4cae | 997 | static int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
1fabe148 | 998 | handle_t *handle, |
883d4cae MF |
999 | struct buffer_head *di_bh, |
1000 | u32 num_bits, | |
1001 | u16 chain) | |
1002 | { | |
1003 | int ret; | |
1004 | u32 tmp_used; | |
1005 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1006 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; | |
1007 | ||
1008 | ret = ocfs2_journal_access(handle, inode, di_bh, | |
1009 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1010 | if (ret < 0) { | |
1011 | mlog_errno(ret); | |
1012 | goto out; | |
1013 | } | |
1014 | ||
1015 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1016 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); | |
1017 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); | |
1018 | ||
1019 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1020 | if (ret < 0) | |
1021 | mlog_errno(ret); | |
1022 | ||
1023 | out: | |
1024 | return ret; | |
1025 | } | |
1026 | ||
1027 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, | |
1fabe148 | 1028 | handle_t *handle, |
883d4cae MF |
1029 | u32 bits_wanted, |
1030 | u32 min_bits, | |
1031 | u16 *bit_off, | |
1032 | unsigned int *num_bits, | |
1033 | u64 gd_blkno, | |
1034 | u16 *bits_left) | |
1035 | { | |
1036 | int ret; | |
1037 | u16 found; | |
1038 | struct buffer_head *group_bh = NULL; | |
1039 | struct ocfs2_group_desc *gd; | |
1040 | struct inode *alloc_inode = ac->ac_inode; | |
883d4cae MF |
1041 | |
1042 | ret = ocfs2_read_block(OCFS2_SB(alloc_inode->i_sb), gd_blkno, | |
1043 | &group_bh, OCFS2_BH_CACHED, alloc_inode); | |
1044 | if (ret < 0) { | |
1045 | mlog_errno(ret); | |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | gd = (struct ocfs2_group_desc *) group_bh->b_data; | |
1050 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { | |
1051 | OCFS2_RO_ON_INVALID_GROUP_DESC(alloc_inode->i_sb, gd); | |
1052 | ret = -EIO; | |
1053 | goto out; | |
1054 | } | |
1055 | ||
1056 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, | |
1057 | bit_off, &found); | |
1058 | if (ret < 0) { | |
1059 | if (ret != -ENOSPC) | |
1060 | mlog_errno(ret); | |
1061 | goto out; | |
1062 | } | |
1063 | ||
1064 | *num_bits = found; | |
1065 | ||
1066 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, | |
1067 | *num_bits, | |
1068 | le16_to_cpu(gd->bg_chain)); | |
1069 | if (ret < 0) { | |
1070 | mlog_errno(ret); | |
1071 | goto out; | |
1072 | } | |
1073 | ||
1074 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, | |
1075 | *bit_off, *num_bits); | |
1076 | if (ret < 0) | |
1077 | mlog_errno(ret); | |
1078 | ||
1079 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); | |
1080 | ||
1081 | out: | |
1082 | brelse(group_bh); | |
1083 | ||
1084 | return ret; | |
1085 | } | |
1086 | ||
ccd979bd | 1087 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
1fabe148 | 1088 | handle_t *handle, |
ccd979bd MF |
1089 | u32 bits_wanted, |
1090 | u32 min_bits, | |
1091 | u16 *bit_off, | |
1092 | unsigned int *num_bits, | |
883d4cae MF |
1093 | u64 *bg_blkno, |
1094 | u16 *bits_left) | |
ccd979bd MF |
1095 | { |
1096 | int status; | |
1097 | u16 chain, tmp_bits; | |
1098 | u32 tmp_used; | |
1099 | u64 next_group; | |
ccd979bd MF |
1100 | struct inode *alloc_inode = ac->ac_inode; |
1101 | struct buffer_head *group_bh = NULL; | |
1102 | struct buffer_head *prev_group_bh = NULL; | |
1103 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1104 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; | |
1105 | struct ocfs2_group_desc *bg; | |
1106 | ||
1107 | chain = ac->ac_chain; | |
b0697053 MF |
1108 | mlog(0, "trying to alloc %u bits from chain %u, inode %llu\n", |
1109 | bits_wanted, chain, | |
1110 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno); | |
ccd979bd MF |
1111 | |
1112 | status = ocfs2_read_block(OCFS2_SB(alloc_inode->i_sb), | |
1113 | le64_to_cpu(cl->cl_recs[chain].c_blkno), | |
1114 | &group_bh, OCFS2_BH_CACHED, alloc_inode); | |
1115 | if (status < 0) { | |
1116 | mlog_errno(status); | |
1117 | goto bail; | |
1118 | } | |
1119 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
7bf72ede MF |
1120 | status = ocfs2_check_group_descriptor(alloc_inode->i_sb, fe, bg); |
1121 | if (status) { | |
1122 | mlog_errno(status); | |
ccd979bd MF |
1123 | goto bail; |
1124 | } | |
1125 | ||
1126 | status = -ENOSPC; | |
1127 | /* for now, the chain search is a bit simplistic. We just use | |
1128 | * the 1st group with any empty bits. */ | |
1129 | while ((status = ac->ac_group_search(alloc_inode, group_bh, | |
1130 | bits_wanted, min_bits, bit_off, | |
1131 | &tmp_bits)) == -ENOSPC) { | |
1132 | if (!bg->bg_next_group) | |
1133 | break; | |
1134 | ||
1135 | if (prev_group_bh) { | |
1136 | brelse(prev_group_bh); | |
1137 | prev_group_bh = NULL; | |
1138 | } | |
1139 | next_group = le64_to_cpu(bg->bg_next_group); | |
1140 | prev_group_bh = group_bh; | |
1141 | group_bh = NULL; | |
1142 | status = ocfs2_read_block(OCFS2_SB(alloc_inode->i_sb), | |
1143 | next_group, &group_bh, | |
1144 | OCFS2_BH_CACHED, alloc_inode); | |
1145 | if (status < 0) { | |
1146 | mlog_errno(status); | |
1147 | goto bail; | |
1148 | } | |
1149 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
7bf72ede MF |
1150 | status = ocfs2_check_group_descriptor(alloc_inode->i_sb, fe, bg); |
1151 | if (status) { | |
1152 | mlog_errno(status); | |
ccd979bd MF |
1153 | goto bail; |
1154 | } | |
1155 | } | |
1156 | if (status < 0) { | |
1157 | if (status != -ENOSPC) | |
1158 | mlog_errno(status); | |
1159 | goto bail; | |
1160 | } | |
1161 | ||
b0697053 | 1162 | mlog(0, "alloc succeeds: we give %u bits from block group %llu\n", |
1ca1a111 | 1163 | tmp_bits, (unsigned long long)le64_to_cpu(bg->bg_blkno)); |
ccd979bd MF |
1164 | |
1165 | *num_bits = tmp_bits; | |
1166 | ||
1167 | BUG_ON(*num_bits == 0); | |
1168 | ||
1169 | /* | |
1170 | * Keep track of previous block descriptor read. When | |
1171 | * we find a target, if we have read more than X | |
1172 | * number of descriptors, and the target is reasonably | |
1173 | * empty, relink him to top of his chain. | |
1174 | * | |
1175 | * We've read 0 extra blocks and only send one more to | |
1176 | * the transaction, yet the next guy to search has a | |
1177 | * much easier time. | |
1178 | * | |
1179 | * Do this *after* figuring out how many bits we're taking out | |
1180 | * of our target group. | |
1181 | */ | |
1182 | if (ac->ac_allow_chain_relink && | |
1183 | (prev_group_bh) && | |
1184 | (ocfs2_block_group_reasonably_empty(bg, *num_bits))) { | |
1185 | status = ocfs2_relink_block_group(handle, alloc_inode, | |
1186 | ac->ac_bh, group_bh, | |
1187 | prev_group_bh, chain); | |
1188 | if (status < 0) { | |
1189 | mlog_errno(status); | |
1190 | goto bail; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | /* Ok, claim our bits now: set the info on dinode, chainlist | |
1195 | * and then the group */ | |
1196 | status = ocfs2_journal_access(handle, | |
1197 | alloc_inode, | |
1198 | ac->ac_bh, | |
1199 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1200 | if (status < 0) { | |
1201 | mlog_errno(status); | |
1202 | goto bail; | |
1203 | } | |
1204 | ||
1205 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
1206 | fe->id1.bitmap1.i_used = cpu_to_le32(*num_bits + tmp_used); | |
1207 | le32_add_cpu(&cl->cl_recs[chain].c_free, -(*num_bits)); | |
1208 | ||
1209 | status = ocfs2_journal_dirty(handle, | |
1210 | ac->ac_bh); | |
1211 | if (status < 0) { | |
1212 | mlog_errno(status); | |
1213 | goto bail; | |
1214 | } | |
1215 | ||
1216 | status = ocfs2_block_group_set_bits(handle, | |
1217 | alloc_inode, | |
1218 | bg, | |
1219 | group_bh, | |
1220 | *bit_off, | |
1221 | *num_bits); | |
1222 | if (status < 0) { | |
1223 | mlog_errno(status); | |
1224 | goto bail; | |
1225 | } | |
1226 | ||
b0697053 | 1227 | mlog(0, "Allocated %u bits from suballocator %llu\n", *num_bits, |
1ca1a111 | 1228 | (unsigned long long)le64_to_cpu(fe->i_blkno)); |
ccd979bd MF |
1229 | |
1230 | *bg_blkno = le64_to_cpu(bg->bg_blkno); | |
883d4cae | 1231 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
ccd979bd MF |
1232 | bail: |
1233 | if (group_bh) | |
1234 | brelse(group_bh); | |
1235 | if (prev_group_bh) | |
1236 | brelse(prev_group_bh); | |
1237 | ||
1238 | mlog_exit(status); | |
1239 | return status; | |
1240 | } | |
1241 | ||
1242 | /* will give out up to bits_wanted contiguous bits. */ | |
1243 | static int ocfs2_claim_suballoc_bits(struct ocfs2_super *osb, | |
1244 | struct ocfs2_alloc_context *ac, | |
1fabe148 | 1245 | handle_t *handle, |
ccd979bd MF |
1246 | u32 bits_wanted, |
1247 | u32 min_bits, | |
1248 | u16 *bit_off, | |
1249 | unsigned int *num_bits, | |
1250 | u64 *bg_blkno) | |
1251 | { | |
1252 | int status; | |
1253 | u16 victim, i; | |
883d4cae MF |
1254 | u16 bits_left = 0; |
1255 | u64 hint_blkno = ac->ac_last_group; | |
ccd979bd MF |
1256 | struct ocfs2_chain_list *cl; |
1257 | struct ocfs2_dinode *fe; | |
1258 | ||
1259 | mlog_entry_void(); | |
1260 | ||
1261 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); | |
1262 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); | |
1263 | BUG_ON(!ac->ac_bh); | |
1264 | ||
1265 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1266 | if (!OCFS2_IS_VALID_DINODE(fe)) { | |
1267 | OCFS2_RO_ON_INVALID_DINODE(osb->sb, fe); | |
1268 | status = -EIO; | |
1269 | goto bail; | |
1270 | } | |
1271 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= | |
1272 | le32_to_cpu(fe->id1.bitmap1.i_total)) { | |
b0697053 MF |
1273 | ocfs2_error(osb->sb, "Chain allocator dinode %llu has %u used " |
1274 | "bits but only %u total.", | |
1275 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
ccd979bd MF |
1276 | le32_to_cpu(fe->id1.bitmap1.i_used), |
1277 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
1278 | status = -EIO; | |
1279 | goto bail; | |
1280 | } | |
1281 | ||
883d4cae MF |
1282 | if (hint_blkno) { |
1283 | /* Attempt to short-circuit the usual search mechanism | |
1284 | * by jumping straight to the most recently used | |
1285 | * allocation group. This helps us mantain some | |
1286 | * contiguousness across allocations. */ | |
da5cbf2f MF |
1287 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
1288 | min_bits, bit_off, num_bits, | |
883d4cae MF |
1289 | hint_blkno, &bits_left); |
1290 | if (!status) { | |
1291 | /* Be careful to update *bg_blkno here as the | |
1292 | * caller is expecting it to be filled in, and | |
1293 | * ocfs2_search_one_group() won't do that for | |
1294 | * us. */ | |
1295 | *bg_blkno = hint_blkno; | |
1296 | goto set_hint; | |
1297 | } | |
1298 | if (status < 0 && status != -ENOSPC) { | |
1299 | mlog_errno(status); | |
1300 | goto bail; | |
1301 | } | |
1302 | } | |
1303 | ||
ccd979bd MF |
1304 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
1305 | ||
1306 | victim = ocfs2_find_victim_chain(cl); | |
1307 | ac->ac_chain = victim; | |
1308 | ac->ac_allow_chain_relink = 1; | |
1309 | ||
da5cbf2f | 1310 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, bit_off, |
883d4cae | 1311 | num_bits, bg_blkno, &bits_left); |
ccd979bd | 1312 | if (!status) |
883d4cae | 1313 | goto set_hint; |
ccd979bd MF |
1314 | if (status < 0 && status != -ENOSPC) { |
1315 | mlog_errno(status); | |
1316 | goto bail; | |
1317 | } | |
1318 | ||
1319 | mlog(0, "Search of victim chain %u came up with nothing, " | |
1320 | "trying all chains now.\n", victim); | |
1321 | ||
1322 | /* If we didn't pick a good victim, then just default to | |
1323 | * searching each chain in order. Don't allow chain relinking | |
1324 | * because we only calculate enough journal credits for one | |
1325 | * relink per alloc. */ | |
1326 | ac->ac_allow_chain_relink = 0; | |
1327 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { | |
1328 | if (i == victim) | |
1329 | continue; | |
1330 | if (!cl->cl_recs[i].c_free) | |
1331 | continue; | |
1332 | ||
1333 | ac->ac_chain = i; | |
da5cbf2f | 1334 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
883d4cae MF |
1335 | bit_off, num_bits, bg_blkno, |
1336 | &bits_left); | |
ccd979bd MF |
1337 | if (!status) |
1338 | break; | |
1339 | if (status < 0 && status != -ENOSPC) { | |
1340 | mlog_errno(status); | |
1341 | goto bail; | |
1342 | } | |
1343 | } | |
ccd979bd | 1344 | |
883d4cae MF |
1345 | set_hint: |
1346 | if (status != -ENOSPC) { | |
1347 | /* If the next search of this group is not likely to | |
1348 | * yield a suitable extent, then we reset the last | |
1349 | * group hint so as to not waste a disk read */ | |
1350 | if (bits_left < min_bits) | |
1351 | ac->ac_last_group = 0; | |
1352 | else | |
1353 | ac->ac_last_group = *bg_blkno; | |
1354 | } | |
1355 | ||
1356 | bail: | |
ccd979bd MF |
1357 | mlog_exit(status); |
1358 | return status; | |
1359 | } | |
1360 | ||
1361 | int ocfs2_claim_metadata(struct ocfs2_super *osb, | |
1fabe148 | 1362 | handle_t *handle, |
ccd979bd MF |
1363 | struct ocfs2_alloc_context *ac, |
1364 | u32 bits_wanted, | |
1365 | u16 *suballoc_bit_start, | |
1366 | unsigned int *num_bits, | |
1367 | u64 *blkno_start) | |
1368 | { | |
1369 | int status; | |
1370 | u64 bg_blkno; | |
1371 | ||
1372 | BUG_ON(!ac); | |
1373 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); | |
1374 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); | |
ccd979bd MF |
1375 | |
1376 | status = ocfs2_claim_suballoc_bits(osb, | |
1377 | ac, | |
da5cbf2f | 1378 | handle, |
ccd979bd MF |
1379 | bits_wanted, |
1380 | 1, | |
1381 | suballoc_bit_start, | |
1382 | num_bits, | |
1383 | &bg_blkno); | |
1384 | if (status < 0) { | |
1385 | mlog_errno(status); | |
1386 | goto bail; | |
1387 | } | |
1388 | atomic_inc(&osb->alloc_stats.bg_allocs); | |
1389 | ||
1390 | *blkno_start = bg_blkno + (u64) *suballoc_bit_start; | |
1391 | ac->ac_bits_given += (*num_bits); | |
1392 | status = 0; | |
1393 | bail: | |
1394 | mlog_exit(status); | |
1395 | return status; | |
1396 | } | |
1397 | ||
1398 | int ocfs2_claim_new_inode(struct ocfs2_super *osb, | |
1fabe148 | 1399 | handle_t *handle, |
ccd979bd MF |
1400 | struct ocfs2_alloc_context *ac, |
1401 | u16 *suballoc_bit, | |
1402 | u64 *fe_blkno) | |
1403 | { | |
1404 | int status; | |
1405 | unsigned int num_bits; | |
1406 | u64 bg_blkno; | |
1407 | ||
1408 | mlog_entry_void(); | |
1409 | ||
1410 | BUG_ON(!ac); | |
1411 | BUG_ON(ac->ac_bits_given != 0); | |
1412 | BUG_ON(ac->ac_bits_wanted != 1); | |
1413 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
ccd979bd MF |
1414 | |
1415 | status = ocfs2_claim_suballoc_bits(osb, | |
1416 | ac, | |
da5cbf2f | 1417 | handle, |
ccd979bd MF |
1418 | 1, |
1419 | 1, | |
1420 | suballoc_bit, | |
1421 | &num_bits, | |
1422 | &bg_blkno); | |
1423 | if (status < 0) { | |
1424 | mlog_errno(status); | |
1425 | goto bail; | |
1426 | } | |
1427 | atomic_inc(&osb->alloc_stats.bg_allocs); | |
1428 | ||
1429 | BUG_ON(num_bits != 1); | |
1430 | ||
1431 | *fe_blkno = bg_blkno + (u64) (*suballoc_bit); | |
1432 | ac->ac_bits_given++; | |
1433 | status = 0; | |
1434 | bail: | |
1435 | mlog_exit(status); | |
1436 | return status; | |
1437 | } | |
1438 | ||
1439 | /* translate a group desc. blkno and it's bitmap offset into | |
1440 | * disk cluster offset. */ | |
1441 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, | |
1442 | u64 bg_blkno, | |
1443 | u16 bg_bit_off) | |
1444 | { | |
1445 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1446 | u32 cluster = 0; | |
1447 | ||
1448 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1449 | ||
1450 | if (bg_blkno != osb->first_cluster_group_blkno) | |
1451 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); | |
1452 | cluster += (u32) bg_bit_off; | |
1453 | return cluster; | |
1454 | } | |
1455 | ||
1456 | /* given a cluster offset, calculate which block group it belongs to | |
1457 | * and return that block offset. */ | |
d659072f | 1458 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
ccd979bd MF |
1459 | { |
1460 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1461 | u32 group_no; | |
1462 | ||
1463 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1464 | ||
1465 | group_no = cluster / osb->bitmap_cpg; | |
1466 | if (!group_no) | |
1467 | return osb->first_cluster_group_blkno; | |
1468 | return ocfs2_clusters_to_blocks(inode->i_sb, | |
1469 | group_no * osb->bitmap_cpg); | |
1470 | } | |
1471 | ||
1472 | /* given the block number of a cluster start, calculate which cluster | |
1473 | * group and descriptor bitmap offset that corresponds to. */ | |
1474 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, | |
1475 | u64 data_blkno, | |
1476 | u64 *bg_blkno, | |
1477 | u16 *bg_bit_off) | |
1478 | { | |
1479 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1480 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); | |
1481 | ||
1482 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1483 | ||
1484 | *bg_blkno = ocfs2_which_cluster_group(inode, | |
1485 | data_cluster); | |
1486 | ||
1487 | if (*bg_blkno == osb->first_cluster_group_blkno) | |
1488 | *bg_bit_off = (u16) data_cluster; | |
1489 | else | |
1490 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, | |
1491 | data_blkno - *bg_blkno); | |
1492 | } | |
1493 | ||
1494 | /* | |
1495 | * min_bits - minimum contiguous chunk from this total allocation we | |
1496 | * can handle. set to what we asked for originally for a full | |
1497 | * contig. allocation, set to '1' to indicate we can deal with extents | |
1498 | * of any size. | |
1499 | */ | |
415cb800 MF |
1500 | int __ocfs2_claim_clusters(struct ocfs2_super *osb, |
1501 | handle_t *handle, | |
1502 | struct ocfs2_alloc_context *ac, | |
1503 | u32 min_clusters, | |
1504 | u32 max_clusters, | |
1505 | u32 *cluster_start, | |
1506 | u32 *num_clusters) | |
ccd979bd MF |
1507 | { |
1508 | int status; | |
415cb800 | 1509 | unsigned int bits_wanted = max_clusters; |
883d4cae | 1510 | u64 bg_blkno = 0; |
ccd979bd MF |
1511 | u16 bg_bit_off; |
1512 | ||
1513 | mlog_entry_void(); | |
1514 | ||
ccd979bd MF |
1515 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
1516 | ||
1517 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL | |
1518 | && ac->ac_which != OCFS2_AC_USE_MAIN); | |
ccd979bd MF |
1519 | |
1520 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { | |
1521 | status = ocfs2_claim_local_alloc_bits(osb, | |
1522 | handle, | |
1523 | ac, | |
1524 | bits_wanted, | |
1525 | cluster_start, | |
1526 | num_clusters); | |
1527 | if (!status) | |
1528 | atomic_inc(&osb->alloc_stats.local_data); | |
1529 | } else { | |
1530 | if (min_clusters > (osb->bitmap_cpg - 1)) { | |
1531 | /* The only paths asking for contiguousness | |
1532 | * should know about this already. */ | |
2fbe8d1e SM |
1533 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
1534 | "group bitmap size %u!\n", min_clusters, | |
1535 | osb->bitmap_cpg); | |
ccd979bd MF |
1536 | status = -ENOSPC; |
1537 | goto bail; | |
1538 | } | |
1539 | /* clamp the current request down to a realistic size. */ | |
1540 | if (bits_wanted > (osb->bitmap_cpg - 1)) | |
1541 | bits_wanted = osb->bitmap_cpg - 1; | |
1542 | ||
1543 | status = ocfs2_claim_suballoc_bits(osb, | |
1544 | ac, | |
da5cbf2f | 1545 | handle, |
ccd979bd MF |
1546 | bits_wanted, |
1547 | min_clusters, | |
1548 | &bg_bit_off, | |
1549 | num_clusters, | |
1550 | &bg_blkno); | |
1551 | if (!status) { | |
1552 | *cluster_start = | |
1553 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, | |
1554 | bg_blkno, | |
1555 | bg_bit_off); | |
1556 | atomic_inc(&osb->alloc_stats.bitmap_data); | |
1557 | } | |
1558 | } | |
1559 | if (status < 0) { | |
1560 | if (status != -ENOSPC) | |
1561 | mlog_errno(status); | |
1562 | goto bail; | |
1563 | } | |
1564 | ||
1565 | ac->ac_bits_given += *num_clusters; | |
1566 | ||
1567 | bail: | |
1568 | mlog_exit(status); | |
1569 | return status; | |
1570 | } | |
1571 | ||
415cb800 MF |
1572 | int ocfs2_claim_clusters(struct ocfs2_super *osb, |
1573 | handle_t *handle, | |
1574 | struct ocfs2_alloc_context *ac, | |
1575 | u32 min_clusters, | |
1576 | u32 *cluster_start, | |
1577 | u32 *num_clusters) | |
1578 | { | |
1579 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; | |
1580 | ||
1581 | return __ocfs2_claim_clusters(osb, handle, ac, min_clusters, | |
1582 | bits_wanted, cluster_start, num_clusters); | |
1583 | } | |
1584 | ||
1fabe148 | 1585 | static inline int ocfs2_block_group_clear_bits(handle_t *handle, |
ccd979bd MF |
1586 | struct inode *alloc_inode, |
1587 | struct ocfs2_group_desc *bg, | |
1588 | struct buffer_head *group_bh, | |
1589 | unsigned int bit_off, | |
1590 | unsigned int num_bits) | |
1591 | { | |
1592 | int status; | |
1593 | unsigned int tmp; | |
1594 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1595 | struct ocfs2_group_desc *undo_bg = NULL; | |
1596 | ||
1597 | mlog_entry_void(); | |
1598 | ||
1599 | if (!OCFS2_IS_VALID_GROUP_DESC(bg)) { | |
1600 | OCFS2_RO_ON_INVALID_GROUP_DESC(alloc_inode->i_sb, bg); | |
1601 | status = -EIO; | |
1602 | goto bail; | |
1603 | } | |
1604 | ||
1605 | mlog(0, "off = %u, num = %u\n", bit_off, num_bits); | |
1606 | ||
1607 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1608 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
1609 | ||
1610 | status = ocfs2_journal_access(handle, alloc_inode, group_bh, | |
1611 | journal_type); | |
1612 | if (status < 0) { | |
1613 | mlog_errno(status); | |
1614 | goto bail; | |
1615 | } | |
1616 | ||
1617 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1618 | undo_bg = (struct ocfs2_group_desc *) bh2jh(group_bh)->b_committed_data; | |
1619 | ||
1620 | tmp = num_bits; | |
1621 | while(tmp--) { | |
1622 | ocfs2_clear_bit((bit_off + tmp), | |
1623 | (unsigned long *) bg->bg_bitmap); | |
1624 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1625 | ocfs2_set_bit(bit_off + tmp, | |
1626 | (unsigned long *) undo_bg->bg_bitmap); | |
1627 | } | |
1628 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); | |
1629 | ||
1630 | status = ocfs2_journal_dirty(handle, group_bh); | |
1631 | if (status < 0) | |
1632 | mlog_errno(status); | |
1633 | bail: | |
1634 | return status; | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * expects the suballoc inode to already be locked. | |
1639 | */ | |
2b604351 MF |
1640 | int ocfs2_free_suballoc_bits(handle_t *handle, |
1641 | struct inode *alloc_inode, | |
1642 | struct buffer_head *alloc_bh, | |
1643 | unsigned int start_bit, | |
1644 | u64 bg_blkno, | |
1645 | unsigned int count) | |
ccd979bd MF |
1646 | { |
1647 | int status = 0; | |
1648 | u32 tmp_used; | |
1649 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
1650 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; | |
1651 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; | |
1652 | struct buffer_head *group_bh = NULL; | |
1653 | struct ocfs2_group_desc *group; | |
1654 | ||
1655 | mlog_entry_void(); | |
1656 | ||
1657 | if (!OCFS2_IS_VALID_DINODE(fe)) { | |
1658 | OCFS2_RO_ON_INVALID_DINODE(alloc_inode->i_sb, fe); | |
1659 | status = -EIO; | |
1660 | goto bail; | |
1661 | } | |
1662 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); | |
1663 | ||
b0697053 MF |
1664 | mlog(0, "%llu: freeing %u bits from group %llu, starting at %u\n", |
1665 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count, | |
1666 | (unsigned long long)bg_blkno, start_bit); | |
ccd979bd MF |
1667 | |
1668 | status = ocfs2_read_block(osb, bg_blkno, &group_bh, OCFS2_BH_CACHED, | |
1669 | alloc_inode); | |
1670 | if (status < 0) { | |
1671 | mlog_errno(status); | |
1672 | goto bail; | |
1673 | } | |
1674 | ||
1675 | group = (struct ocfs2_group_desc *) group_bh->b_data; | |
7bf72ede MF |
1676 | status = ocfs2_check_group_descriptor(alloc_inode->i_sb, fe, group); |
1677 | if (status) { | |
1678 | mlog_errno(status); | |
ccd979bd MF |
1679 | goto bail; |
1680 | } | |
1681 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); | |
1682 | ||
1683 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, | |
1684 | group, group_bh, | |
1685 | start_bit, count); | |
1686 | if (status < 0) { | |
1687 | mlog_errno(status); | |
1688 | goto bail; | |
1689 | } | |
1690 | ||
1691 | status = ocfs2_journal_access(handle, alloc_inode, alloc_bh, | |
1692 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1693 | if (status < 0) { | |
1694 | mlog_errno(status); | |
1695 | goto bail; | |
1696 | } | |
1697 | ||
1698 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, | |
1699 | count); | |
1700 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
1701 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); | |
1702 | ||
1703 | status = ocfs2_journal_dirty(handle, alloc_bh); | |
1704 | if (status < 0) { | |
1705 | mlog_errno(status); | |
1706 | goto bail; | |
1707 | } | |
1708 | ||
1709 | bail: | |
1710 | if (group_bh) | |
1711 | brelse(group_bh); | |
1712 | ||
1713 | mlog_exit(status); | |
1714 | return status; | |
1715 | } | |
1716 | ||
1fabe148 | 1717 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
1718 | struct inode *inode_alloc_inode, |
1719 | struct buffer_head *inode_alloc_bh, | |
1720 | struct ocfs2_dinode *di) | |
1721 | { | |
1722 | u64 blk = le64_to_cpu(di->i_blkno); | |
1723 | u16 bit = le16_to_cpu(di->i_suballoc_bit); | |
1724 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1725 | ||
1726 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, | |
1727 | inode_alloc_bh, bit, bg_blkno, 1); | |
1728 | } | |
1729 | ||
1fabe148 | 1730 | int ocfs2_free_clusters(handle_t *handle, |
ccd979bd MF |
1731 | struct inode *bitmap_inode, |
1732 | struct buffer_head *bitmap_bh, | |
1733 | u64 start_blk, | |
1734 | unsigned int num_clusters) | |
1735 | { | |
1736 | int status; | |
1737 | u16 bg_start_bit; | |
1738 | u64 bg_blkno; | |
1739 | struct ocfs2_dinode *fe; | |
1740 | ||
1741 | /* You can't ever have a contiguous set of clusters | |
1742 | * bigger than a block group bitmap so we never have to worry | |
1743 | * about looping on them. */ | |
1744 | ||
1745 | mlog_entry_void(); | |
1746 | ||
1747 | /* This is expensive. We can safely remove once this stuff has | |
1748 | * gotten tested really well. */ | |
1749 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); | |
1750 | ||
1751 | fe = (struct ocfs2_dinode *) bitmap_bh->b_data; | |
1752 | ||
1753 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, | |
1754 | &bg_start_bit); | |
1755 | ||
b0697053 MF |
1756 | mlog(0, "want to free %u clusters starting at block %llu\n", |
1757 | num_clusters, (unsigned long long)start_blk); | |
1758 | mlog(0, "bg_blkno = %llu, bg_start_bit = %u\n", | |
1759 | (unsigned long long)bg_blkno, bg_start_bit); | |
ccd979bd MF |
1760 | |
1761 | status = ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, | |
1762 | bg_start_bit, bg_blkno, | |
1763 | num_clusters); | |
1764 | if (status < 0) | |
1765 | mlog_errno(status); | |
1766 | ||
1767 | mlog_exit(status); | |
1768 | return status; | |
1769 | } | |
1770 | ||
1771 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) | |
1772 | { | |
1773 | printk("Block Group:\n"); | |
1774 | printk("bg_signature: %s\n", bg->bg_signature); | |
1775 | printk("bg_size: %u\n", bg->bg_size); | |
1776 | printk("bg_bits: %u\n", bg->bg_bits); | |
1777 | printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); | |
1778 | printk("bg_chain: %u\n", bg->bg_chain); | |
1779 | printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); | |
b0697053 MF |
1780 | printk("bg_next_group: %llu\n", |
1781 | (unsigned long long)bg->bg_next_group); | |
1782 | printk("bg_parent_dinode: %llu\n", | |
1783 | (unsigned long long)bg->bg_parent_dinode); | |
1784 | printk("bg_blkno: %llu\n", | |
1785 | (unsigned long long)bg->bg_blkno); | |
ccd979bd MF |
1786 | } |
1787 | ||
1788 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) | |
1789 | { | |
1790 | int i; | |
1791 | ||
b0697053 | 1792 | printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); |
ccd979bd | 1793 | printk("i_signature: %s\n", fe->i_signature); |
b0697053 MF |
1794 | printk("i_size: %llu\n", |
1795 | (unsigned long long)fe->i_size); | |
ccd979bd MF |
1796 | printk("i_clusters: %u\n", fe->i_clusters); |
1797 | printk("i_generation: %u\n", | |
1798 | le32_to_cpu(fe->i_generation)); | |
1799 | printk("id1.bitmap1.i_used: %u\n", | |
1800 | le32_to_cpu(fe->id1.bitmap1.i_used)); | |
1801 | printk("id1.bitmap1.i_total: %u\n", | |
1802 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
1803 | printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); | |
1804 | printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); | |
1805 | printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); | |
1806 | printk("id2.i_chain.cl_next_free_rec: %u\n", | |
1807 | fe->id2.i_chain.cl_next_free_rec); | |
1808 | for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { | |
1809 | printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, | |
1810 | fe->id2.i_chain.cl_recs[i].c_free); | |
1811 | printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, | |
1812 | fe->id2.i_chain.cl_recs[i].c_total); | |
b0697053 MF |
1813 | printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, |
1814 | (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); | |
ccd979bd MF |
1815 | } |
1816 | } |