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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" | |
d6b32bbb | 38 | #include "blockcheck.h" |
ccd979bd MF |
39 | #include "dlmglue.h" |
40 | #include "inode.h" | |
41 | #include "journal.h" | |
42 | #include "localalloc.h" | |
43 | #include "suballoc.h" | |
44 | #include "super.h" | |
45 | #include "sysfile.h" | |
46 | #include "uptodate.h" | |
47 | ||
48 | #include "buffer_head_io.h" | |
49 | ||
ffda89a3 | 50 | #define NOT_ALLOC_NEW_GROUP 0 |
60ca81e8 TM |
51 | #define ALLOC_NEW_GROUP 0x1 |
52 | #define ALLOC_GROUPS_FROM_GLOBAL 0x2 | |
ffda89a3 | 53 | |
b89c5428 | 54 | #define OCFS2_MAX_TO_STEAL 1024 |
4d0ddb2c | 55 | |
ccd979bd MF |
56 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); |
57 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); | |
58 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); | |
1fabe148 | 59 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
60 | struct inode *alloc_inode, |
61 | struct buffer_head *bg_bh, | |
62 | u64 group_blkno, | |
63 | u16 my_chain, | |
64 | struct ocfs2_chain_list *cl); | |
65 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
66 | struct inode *alloc_inode, | |
1187c968 | 67 | struct buffer_head *bh, |
60ca81e8 | 68 | u64 max_block, |
feb473a6 | 69 | u64 *last_alloc_group, |
60ca81e8 | 70 | int flags); |
ccd979bd | 71 | |
ccd979bd MF |
72 | static int ocfs2_cluster_group_search(struct inode *inode, |
73 | struct buffer_head *group_bh, | |
74 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 75 | u64 max_block, |
ccd979bd MF |
76 | u16 *bit_off, u16 *bits_found); |
77 | static int ocfs2_block_group_search(struct inode *inode, | |
78 | struct buffer_head *group_bh, | |
79 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 80 | u64 max_block, |
ccd979bd | 81 | u16 *bit_off, u16 *bits_found); |
ccd979bd MF |
82 | static int ocfs2_claim_suballoc_bits(struct ocfs2_super *osb, |
83 | struct ocfs2_alloc_context *ac, | |
1fabe148 | 84 | handle_t *handle, |
ccd979bd MF |
85 | u32 bits_wanted, |
86 | u32 min_bits, | |
87 | u16 *bit_off, | |
88 | unsigned int *num_bits, | |
89 | u64 *bg_blkno); | |
90 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
91 | int nr); | |
1fabe148 | 92 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
93 | struct inode *alloc_inode, |
94 | struct ocfs2_group_desc *bg, | |
95 | struct buffer_head *group_bh, | |
96 | unsigned int bit_off, | |
97 | unsigned int num_bits); | |
1fabe148 | 98 | static inline int ocfs2_block_group_clear_bits(handle_t *handle, |
ccd979bd MF |
99 | struct inode *alloc_inode, |
100 | struct ocfs2_group_desc *bg, | |
101 | struct buffer_head *group_bh, | |
102 | unsigned int bit_off, | |
103 | unsigned int num_bits); | |
104 | ||
1fabe148 | 105 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
106 | struct inode *alloc_inode, |
107 | struct buffer_head *fe_bh, | |
108 | struct buffer_head *bg_bh, | |
109 | struct buffer_head *prev_bg_bh, | |
110 | u16 chain); | |
111 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
112 | u32 wanted); | |
ccd979bd MF |
113 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
114 | u64 bg_blkno, | |
115 | u16 bg_bit_off); | |
ccd979bd MF |
116 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
117 | u64 data_blkno, | |
118 | u64 *bg_blkno, | |
119 | u16 *bg_bit_off); | |
1187c968 JB |
120 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
121 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 122 | int flags, |
1187c968 | 123 | struct ocfs2_alloc_context **ac); |
ccd979bd | 124 | |
9c7af40b | 125 | void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) |
ccd979bd | 126 | { |
da5cbf2f MF |
127 | struct inode *inode = ac->ac_inode; |
128 | ||
129 | if (inode) { | |
130 | if (ac->ac_which != OCFS2_AC_USE_LOCAL) | |
e63aecb6 | 131 | ocfs2_inode_unlock(inode, 1); |
da5cbf2f MF |
132 | |
133 | mutex_unlock(&inode->i_mutex); | |
134 | ||
135 | iput(inode); | |
4d0ddb2c | 136 | ac->ac_inode = NULL; |
da5cbf2f | 137 | } |
a81cb88b MF |
138 | brelse(ac->ac_bh); |
139 | ac->ac_bh = NULL; | |
4d0ddb2c TM |
140 | } |
141 | ||
142 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) | |
143 | { | |
144 | ocfs2_free_ac_resource(ac); | |
ccd979bd MF |
145 | kfree(ac); |
146 | } | |
147 | ||
148 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) | |
149 | { | |
150 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); | |
151 | } | |
152 | ||
57e3e797 JB |
153 | #define do_error(fmt, ...) \ |
154 | do{ \ | |
155 | if (clean_error) \ | |
156 | mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \ | |
157 | else \ | |
158 | ocfs2_error(sb, fmt, ##__VA_ARGS__); \ | |
159 | } while (0) | |
160 | ||
970e4936 JB |
161 | static int ocfs2_validate_gd_self(struct super_block *sb, |
162 | struct buffer_head *bh, | |
163 | int clean_error) | |
164 | { | |
165 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
166 | ||
7bf72ede | 167 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { |
68f64d47 JB |
168 | do_error("Group descriptor #%llu has bad signature %.*s", |
169 | (unsigned long long)bh->b_blocknr, 7, | |
57e3e797 JB |
170 | gd->bg_signature); |
171 | return -EINVAL; | |
7bf72ede MF |
172 | } |
173 | ||
68f64d47 JB |
174 | if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { |
175 | do_error("Group descriptor #%llu has an invalid bg_blkno " | |
176 | "of %llu", | |
177 | (unsigned long long)bh->b_blocknr, | |
178 | (unsigned long long)le64_to_cpu(gd->bg_blkno)); | |
179 | return -EINVAL; | |
180 | } | |
181 | ||
182 | if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { | |
183 | do_error("Group descriptor #%llu has an invalid " | |
184 | "fs_generation of #%u", | |
185 | (unsigned long long)bh->b_blocknr, | |
186 | le32_to_cpu(gd->bg_generation)); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
970e4936 JB |
190 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { |
191 | do_error("Group descriptor #%llu has bit count %u but " | |
192 | "claims that %u are free", | |
193 | (unsigned long long)bh->b_blocknr, | |
194 | le16_to_cpu(gd->bg_bits), | |
195 | le16_to_cpu(gd->bg_free_bits_count)); | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { | |
200 | do_error("Group descriptor #%llu has bit count %u but " | |
201 | "max bitmap bits of %u", | |
202 | (unsigned long long)bh->b_blocknr, | |
203 | le16_to_cpu(gd->bg_bits), | |
204 | 8 * le16_to_cpu(gd->bg_size)); | |
205 | return -EINVAL; | |
206 | } | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | static int ocfs2_validate_gd_parent(struct super_block *sb, | |
212 | struct ocfs2_dinode *di, | |
213 | struct buffer_head *bh, | |
214 | int clean_error) | |
215 | { | |
216 | unsigned int max_bits; | |
217 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
218 | ||
7bf72ede | 219 | if (di->i_blkno != gd->bg_parent_dinode) { |
68f64d47 | 220 | do_error("Group descriptor #%llu has bad parent " |
57e3e797 | 221 | "pointer (%llu, expected %llu)", |
68f64d47 | 222 | (unsigned long long)bh->b_blocknr, |
57e3e797 JB |
223 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), |
224 | (unsigned long long)le64_to_cpu(di->i_blkno)); | |
225 | return -EINVAL; | |
7bf72ede MF |
226 | } |
227 | ||
228 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); | |
229 | if (le16_to_cpu(gd->bg_bits) > max_bits) { | |
68f64d47 JB |
230 | do_error("Group descriptor #%llu has bit count of %u", |
231 | (unsigned long long)bh->b_blocknr, | |
57e3e797 JB |
232 | le16_to_cpu(gd->bg_bits)); |
233 | return -EINVAL; | |
7bf72ede MF |
234 | } |
235 | ||
236 | if (le16_to_cpu(gd->bg_chain) >= | |
237 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) { | |
68f64d47 JB |
238 | do_error("Group descriptor #%llu has bad chain %u", |
239 | (unsigned long long)bh->b_blocknr, | |
57e3e797 JB |
240 | le16_to_cpu(gd->bg_chain)); |
241 | return -EINVAL; | |
7bf72ede MF |
242 | } |
243 | ||
970e4936 JB |
244 | return 0; |
245 | } | |
7bf72ede | 246 | |
57e3e797 | 247 | #undef do_error |
7bf72ede | 248 | |
970e4936 JB |
249 | /* |
250 | * This version only prints errors. It does not fail the filesystem, and | |
251 | * exists only for resize. | |
252 | */ | |
253 | int ocfs2_check_group_descriptor(struct super_block *sb, | |
254 | struct ocfs2_dinode *di, | |
255 | struct buffer_head *bh) | |
256 | { | |
257 | int rc; | |
d6b32bbb JB |
258 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
259 | ||
260 | BUG_ON(!buffer_uptodate(bh)); | |
970e4936 | 261 | |
d6b32bbb JB |
262 | /* |
263 | * If the ecc fails, we return the error but otherwise | |
264 | * leave the filesystem running. We know any error is | |
265 | * local to this block. | |
266 | */ | |
267 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
13723d00 JB |
268 | if (rc) { |
269 | mlog(ML_ERROR, | |
270 | "Checksum failed for group descriptor %llu\n", | |
271 | (unsigned long long)bh->b_blocknr); | |
272 | } else | |
d6b32bbb | 273 | rc = ocfs2_validate_gd_self(sb, bh, 1); |
970e4936 JB |
274 | if (!rc) |
275 | rc = ocfs2_validate_gd_parent(sb, di, bh, 1); | |
276 | ||
277 | return rc; | |
278 | } | |
279 | ||
280 | static int ocfs2_validate_group_descriptor(struct super_block *sb, | |
281 | struct buffer_head *bh) | |
282 | { | |
d6b32bbb JB |
283 | int rc; |
284 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
285 | ||
970e4936 JB |
286 | mlog(0, "Validating group descriptor %llu\n", |
287 | (unsigned long long)bh->b_blocknr); | |
288 | ||
d6b32bbb JB |
289 | BUG_ON(!buffer_uptodate(bh)); |
290 | ||
291 | /* | |
292 | * If the ecc fails, we return the error but otherwise | |
293 | * leave the filesystem running. We know any error is | |
294 | * local to this block. | |
295 | */ | |
296 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
297 | if (rc) | |
298 | return rc; | |
299 | ||
300 | /* | |
301 | * Errors after here are fatal. | |
302 | */ | |
303 | ||
970e4936 | 304 | return ocfs2_validate_gd_self(sb, bh, 0); |
7bf72ede MF |
305 | } |
306 | ||
68f64d47 JB |
307 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, |
308 | u64 gd_blkno, struct buffer_head **bh) | |
309 | { | |
310 | int rc; | |
311 | struct buffer_head *tmp = *bh; | |
312 | ||
8cb471e8 | 313 | rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, |
970e4936 | 314 | ocfs2_validate_group_descriptor); |
68f64d47 JB |
315 | if (rc) |
316 | goto out; | |
317 | ||
970e4936 | 318 | rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); |
68f64d47 JB |
319 | if (rc) { |
320 | brelse(tmp); | |
321 | goto out; | |
322 | } | |
323 | ||
324 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
325 | if (!*bh) | |
326 | *bh = tmp; | |
327 | ||
328 | out: | |
329 | return rc; | |
330 | } | |
331 | ||
1fabe148 | 332 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
333 | struct inode *alloc_inode, |
334 | struct buffer_head *bg_bh, | |
335 | u64 group_blkno, | |
336 | u16 my_chain, | |
337 | struct ocfs2_chain_list *cl) | |
338 | { | |
339 | int status = 0; | |
340 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
341 | struct super_block * sb = alloc_inode->i_sb; | |
342 | ||
343 | mlog_entry_void(); | |
344 | ||
345 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { | |
b0697053 MF |
346 | ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " |
347 | "b_blocknr (%llu)", | |
348 | (unsigned long long)group_blkno, | |
ccd979bd MF |
349 | (unsigned long long) bg_bh->b_blocknr); |
350 | status = -EIO; | |
351 | goto bail; | |
352 | } | |
353 | ||
13723d00 | 354 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 355 | INODE_CACHE(alloc_inode), |
13723d00 JB |
356 | bg_bh, |
357 | OCFS2_JOURNAL_ACCESS_CREATE); | |
ccd979bd MF |
358 | if (status < 0) { |
359 | mlog_errno(status); | |
360 | goto bail; | |
361 | } | |
362 | ||
363 | memset(bg, 0, sb->s_blocksize); | |
364 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); | |
365 | bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); | |
366 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb)); | |
367 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); | |
368 | bg->bg_chain = cpu_to_le16(my_chain); | |
369 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; | |
370 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); | |
371 | bg->bg_blkno = cpu_to_le64(group_blkno); | |
372 | /* set the 1st bit in the bitmap to account for the descriptor block */ | |
373 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); | |
374 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); | |
375 | ||
376 | status = ocfs2_journal_dirty(handle, bg_bh); | |
377 | if (status < 0) | |
378 | mlog_errno(status); | |
379 | ||
380 | /* There is no need to zero out or otherwise initialize the | |
381 | * other blocks in a group - All valid FS metadata in a block | |
382 | * group stores the superblock fs_generation value at | |
383 | * allocation time. */ | |
384 | ||
385 | bail: | |
386 | mlog_exit(status); | |
387 | return status; | |
388 | } | |
389 | ||
390 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) | |
391 | { | |
392 | u16 curr, best; | |
393 | ||
394 | best = curr = 0; | |
395 | while (curr < le16_to_cpu(cl->cl_count)) { | |
396 | if (le32_to_cpu(cl->cl_recs[best].c_total) > | |
397 | le32_to_cpu(cl->cl_recs[curr].c_total)) | |
398 | best = curr; | |
399 | curr++; | |
400 | } | |
401 | return best; | |
402 | } | |
403 | ||
404 | /* | |
405 | * We expect the block group allocator to already be locked. | |
406 | */ | |
407 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
408 | struct inode *alloc_inode, | |
1187c968 | 409 | struct buffer_head *bh, |
60ca81e8 | 410 | u64 max_block, |
feb473a6 | 411 | u64 *last_alloc_group, |
60ca81e8 | 412 | int flags) |
ccd979bd MF |
413 | { |
414 | int status, credits; | |
415 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; | |
416 | struct ocfs2_chain_list *cl; | |
417 | struct ocfs2_alloc_context *ac = NULL; | |
1fabe148 | 418 | handle_t *handle = NULL; |
ccd979bd MF |
419 | u32 bit_off, num_bits; |
420 | u16 alloc_rec; | |
421 | u64 bg_blkno; | |
422 | struct buffer_head *bg_bh = NULL; | |
423 | struct ocfs2_group_desc *bg; | |
424 | ||
425 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); | |
426 | ||
427 | mlog_entry_void(); | |
428 | ||
ccd979bd | 429 | cl = &fe->id2.i_chain; |
1187c968 JB |
430 | status = ocfs2_reserve_clusters_with_limit(osb, |
431 | le16_to_cpu(cl->cl_cpg), | |
60ca81e8 | 432 | max_block, flags, &ac); |
ccd979bd MF |
433 | if (status < 0) { |
434 | if (status != -ENOSPC) | |
435 | mlog_errno(status); | |
436 | goto bail; | |
437 | } | |
438 | ||
439 | credits = ocfs2_calc_group_alloc_credits(osb->sb, | |
440 | le16_to_cpu(cl->cl_cpg)); | |
65eff9cc | 441 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
442 | if (IS_ERR(handle)) { |
443 | status = PTR_ERR(handle); | |
444 | handle = NULL; | |
445 | mlog_errno(status); | |
446 | goto bail; | |
447 | } | |
448 | ||
feb473a6 TM |
449 | if (last_alloc_group && *last_alloc_group != 0) { |
450 | mlog(0, "use old allocation group %llu for block group alloc\n", | |
451 | (unsigned long long)*last_alloc_group); | |
452 | ac->ac_last_group = *last_alloc_group; | |
453 | } | |
ccd979bd MF |
454 | status = ocfs2_claim_clusters(osb, |
455 | handle, | |
456 | ac, | |
457 | le16_to_cpu(cl->cl_cpg), | |
458 | &bit_off, | |
459 | &num_bits); | |
460 | if (status < 0) { | |
461 | if (status != -ENOSPC) | |
462 | mlog_errno(status); | |
463 | goto bail; | |
464 | } | |
465 | ||
466 | alloc_rec = ocfs2_find_smallest_chain(cl); | |
467 | ||
468 | /* setup the group */ | |
469 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
b0697053 MF |
470 | mlog(0, "new descriptor, record %u, at block %llu\n", |
471 | alloc_rec, (unsigned long long)bg_blkno); | |
ccd979bd MF |
472 | |
473 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
474 | if (!bg_bh) { | |
475 | status = -EIO; | |
476 | mlog_errno(status); | |
477 | goto bail; | |
478 | } | |
8cb471e8 | 479 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); |
ccd979bd MF |
480 | |
481 | status = ocfs2_block_group_fill(handle, | |
482 | alloc_inode, | |
483 | bg_bh, | |
484 | bg_blkno, | |
485 | alloc_rec, | |
486 | cl); | |
487 | if (status < 0) { | |
488 | mlog_errno(status); | |
489 | goto bail; | |
490 | } | |
491 | ||
492 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
493 | ||
0cf2f763 | 494 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
13723d00 | 495 | bh, OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
496 | if (status < 0) { |
497 | mlog_errno(status); | |
498 | goto bail; | |
499 | } | |
500 | ||
501 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, | |
502 | le16_to_cpu(bg->bg_free_bits_count)); | |
503 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, le16_to_cpu(bg->bg_bits)); | |
504 | cl->cl_recs[alloc_rec].c_blkno = cpu_to_le64(bg_blkno); | |
505 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) | |
506 | le16_add_cpu(&cl->cl_next_free_rec, 1); | |
507 | ||
508 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - | |
509 | le16_to_cpu(bg->bg_free_bits_count)); | |
510 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); | |
511 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); | |
512 | ||
513 | status = ocfs2_journal_dirty(handle, bh); | |
514 | if (status < 0) { | |
515 | mlog_errno(status); | |
516 | goto bail; | |
517 | } | |
518 | ||
519 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); | |
520 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
521 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, | |
522 | le32_to_cpu(fe->i_clusters))); | |
523 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); | |
524 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); | |
8110b073 | 525 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
ccd979bd MF |
526 | |
527 | status = 0; | |
feb473a6 TM |
528 | |
529 | /* save the new last alloc group so that the caller can cache it. */ | |
530 | if (last_alloc_group) | |
531 | *last_alloc_group = ac->ac_last_group; | |
532 | ||
ccd979bd MF |
533 | bail: |
534 | if (handle) | |
02dc1af4 | 535 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
536 | |
537 | if (ac) | |
538 | ocfs2_free_alloc_context(ac); | |
539 | ||
a81cb88b | 540 | brelse(bg_bh); |
ccd979bd MF |
541 | |
542 | mlog_exit(status); | |
543 | return status; | |
544 | } | |
545 | ||
546 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, | |
da5cbf2f MF |
547 | struct ocfs2_alloc_context *ac, |
548 | int type, | |
ffda89a3 | 549 | u32 slot, |
feb473a6 | 550 | u64 *last_alloc_group, |
60ca81e8 | 551 | int flags) |
ccd979bd MF |
552 | { |
553 | int status; | |
554 | u32 bits_wanted = ac->ac_bits_wanted; | |
da5cbf2f | 555 | struct inode *alloc_inode; |
ccd979bd | 556 | struct buffer_head *bh = NULL; |
ccd979bd MF |
557 | struct ocfs2_dinode *fe; |
558 | u32 free_bits; | |
559 | ||
560 | mlog_entry_void(); | |
561 | ||
da5cbf2f MF |
562 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
563 | if (!alloc_inode) { | |
564 | mlog_errno(-EINVAL); | |
565 | return -EINVAL; | |
566 | } | |
ccd979bd | 567 | |
da5cbf2f MF |
568 | mutex_lock(&alloc_inode->i_mutex); |
569 | ||
e63aecb6 | 570 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
ccd979bd | 571 | if (status < 0) { |
da5cbf2f MF |
572 | mutex_unlock(&alloc_inode->i_mutex); |
573 | iput(alloc_inode); | |
574 | ||
ccd979bd | 575 | mlog_errno(status); |
da5cbf2f | 576 | return status; |
ccd979bd MF |
577 | } |
578 | ||
da5cbf2f | 579 | ac->ac_inode = alloc_inode; |
a4a48911 | 580 | ac->ac_alloc_slot = slot; |
da5cbf2f | 581 | |
ccd979bd | 582 | fe = (struct ocfs2_dinode *) bh->b_data; |
10995aa2 JB |
583 | |
584 | /* The bh was validated by the inode read inside | |
585 | * ocfs2_inode_lock(). Any corruption is a code bug. */ | |
586 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
587 | ||
ccd979bd | 588 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { |
b0697053 MF |
589 | ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", |
590 | (unsigned long long)le64_to_cpu(fe->i_blkno)); | |
ccd979bd MF |
591 | status = -EIO; |
592 | goto bail; | |
593 | } | |
594 | ||
595 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - | |
596 | le32_to_cpu(fe->id1.bitmap1.i_used); | |
597 | ||
598 | if (bits_wanted > free_bits) { | |
599 | /* cluster bitmap never grows */ | |
600 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { | |
601 | mlog(0, "Disk Full: wanted=%u, free_bits=%u\n", | |
602 | bits_wanted, free_bits); | |
603 | status = -ENOSPC; | |
604 | goto bail; | |
605 | } | |
606 | ||
60ca81e8 | 607 | if (!(flags & ALLOC_NEW_GROUP)) { |
ffda89a3 TM |
608 | mlog(0, "Alloc File %u Full: wanted=%u, free_bits=%u, " |
609 | "and we don't alloc a new group for it.\n", | |
610 | slot, bits_wanted, free_bits); | |
611 | status = -ENOSPC; | |
612 | goto bail; | |
613 | } | |
614 | ||
1187c968 | 615 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh, |
feb473a6 TM |
616 | ac->ac_max_block, |
617 | last_alloc_group, flags); | |
ccd979bd MF |
618 | if (status < 0) { |
619 | if (status != -ENOSPC) | |
620 | mlog_errno(status); | |
621 | goto bail; | |
622 | } | |
623 | atomic_inc(&osb->alloc_stats.bg_extends); | |
624 | ||
625 | /* You should never ask for this much metadata */ | |
626 | BUG_ON(bits_wanted > | |
627 | (le32_to_cpu(fe->id1.bitmap1.i_total) | |
628 | - le32_to_cpu(fe->id1.bitmap1.i_used))); | |
629 | } | |
630 | ||
631 | get_bh(bh); | |
632 | ac->ac_bh = bh; | |
633 | bail: | |
a81cb88b | 634 | brelse(bh); |
ccd979bd MF |
635 | |
636 | mlog_exit(status); | |
637 | return status; | |
638 | } | |
639 | ||
b89c5428 TY |
640 | static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
641 | { | |
642 | spin_lock(&osb->osb_lock); | |
643 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
644 | spin_unlock(&osb->osb_lock); | |
645 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
646 | } | |
647 | ||
648 | static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) | |
649 | { | |
650 | spin_lock(&osb->osb_lock); | |
651 | osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; | |
652 | spin_unlock(&osb->osb_lock); | |
653 | atomic_set(&osb->s_num_meta_stolen, 0); | |
654 | } | |
655 | ||
656 | void ocfs2_init_steal_slots(struct ocfs2_super *osb) | |
657 | { | |
658 | ocfs2_init_inode_steal_slot(osb); | |
659 | ocfs2_init_meta_steal_slot(osb); | |
660 | } | |
661 | ||
662 | static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) | |
663 | { | |
664 | spin_lock(&osb->osb_lock); | |
665 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
666 | osb->s_inode_steal_slot = slot; | |
667 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
668 | osb->s_meta_steal_slot = slot; | |
669 | spin_unlock(&osb->osb_lock); | |
670 | } | |
671 | ||
672 | static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) | |
673 | { | |
674 | int slot = OCFS2_INVALID_SLOT; | |
675 | ||
676 | spin_lock(&osb->osb_lock); | |
677 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
678 | slot = osb->s_inode_steal_slot; | |
679 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
680 | slot = osb->s_meta_steal_slot; | |
681 | spin_unlock(&osb->osb_lock); | |
682 | ||
683 | return slot; | |
684 | } | |
685 | ||
686 | static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
687 | { | |
688 | return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); | |
689 | } | |
690 | ||
691 | static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) | |
692 | { | |
693 | return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); | |
694 | } | |
695 | ||
696 | static int ocfs2_steal_resource(struct ocfs2_super *osb, | |
697 | struct ocfs2_alloc_context *ac, | |
698 | int type) | |
699 | { | |
700 | int i, status = -ENOSPC; | |
701 | int slot = __ocfs2_get_steal_slot(osb, type); | |
702 | ||
703 | /* Start to steal resource from the first slot after ours. */ | |
704 | if (slot == OCFS2_INVALID_SLOT) | |
705 | slot = osb->slot_num + 1; | |
706 | ||
707 | for (i = 0; i < osb->max_slots; i++, slot++) { | |
708 | if (slot == osb->max_slots) | |
709 | slot = 0; | |
710 | ||
711 | if (slot == osb->slot_num) | |
712 | continue; | |
713 | ||
714 | status = ocfs2_reserve_suballoc_bits(osb, ac, | |
715 | type, | |
716 | (u32)slot, NULL, | |
717 | NOT_ALLOC_NEW_GROUP); | |
718 | if (status >= 0) { | |
719 | __ocfs2_set_steal_slot(osb, slot, type); | |
720 | break; | |
721 | } | |
722 | ||
723 | ocfs2_free_ac_resource(ac); | |
724 | } | |
725 | ||
726 | return status; | |
727 | } | |
728 | ||
729 | static int ocfs2_steal_inode(struct ocfs2_super *osb, | |
730 | struct ocfs2_alloc_context *ac) | |
731 | { | |
732 | return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); | |
733 | } | |
734 | ||
735 | static int ocfs2_steal_meta(struct ocfs2_super *osb, | |
736 | struct ocfs2_alloc_context *ac) | |
737 | { | |
738 | return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); | |
739 | } | |
740 | ||
cf1d6c76 TY |
741 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
742 | int blocks, | |
743 | struct ocfs2_alloc_context **ac) | |
ccd979bd MF |
744 | { |
745 | int status; | |
b89c5428 | 746 | int slot = ocfs2_get_meta_steal_slot(osb); |
ccd979bd | 747 | |
cd861280 | 748 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
749 | if (!(*ac)) { |
750 | status = -ENOMEM; | |
751 | mlog_errno(status); | |
752 | goto bail; | |
753 | } | |
754 | ||
cf1d6c76 | 755 | (*ac)->ac_bits_wanted = blocks; |
ccd979bd | 756 | (*ac)->ac_which = OCFS2_AC_USE_META; |
ccd979bd MF |
757 | (*ac)->ac_group_search = ocfs2_block_group_search; |
758 | ||
b89c5428 TY |
759 | if (slot != OCFS2_INVALID_SLOT && |
760 | atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) | |
761 | goto extent_steal; | |
762 | ||
763 | atomic_set(&osb->s_num_meta_stolen, 0); | |
da5cbf2f | 764 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
ffda89a3 | 765 | EXTENT_ALLOC_SYSTEM_INODE, |
b89c5428 TY |
766 | (u32)osb->slot_num, NULL, |
767 | ALLOC_NEW_GROUP); | |
768 | ||
769 | ||
770 | if (status >= 0) { | |
771 | status = 0; | |
772 | if (slot != OCFS2_INVALID_SLOT) | |
773 | ocfs2_init_meta_steal_slot(osb); | |
774 | goto bail; | |
775 | } else if (status < 0 && status != -ENOSPC) { | |
776 | mlog_errno(status); | |
777 | goto bail; | |
778 | } | |
779 | ||
780 | ocfs2_free_ac_resource(*ac); | |
781 | ||
782 | extent_steal: | |
783 | status = ocfs2_steal_meta(osb, *ac); | |
784 | atomic_inc(&osb->s_num_meta_stolen); | |
ccd979bd MF |
785 | if (status < 0) { |
786 | if (status != -ENOSPC) | |
787 | mlog_errno(status); | |
788 | goto bail; | |
789 | } | |
790 | ||
791 | status = 0; | |
792 | bail: | |
793 | if ((status < 0) && *ac) { | |
794 | ocfs2_free_alloc_context(*ac); | |
795 | *ac = NULL; | |
796 | } | |
797 | ||
ccd979bd MF |
798 | mlog_exit(status); |
799 | return status; | |
800 | } | |
801 | ||
cf1d6c76 TY |
802 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
803 | struct ocfs2_extent_list *root_el, | |
804 | struct ocfs2_alloc_context **ac) | |
805 | { | |
806 | return ocfs2_reserve_new_metadata_blocks(osb, | |
807 | ocfs2_extend_meta_needed(root_el), | |
808 | ac); | |
809 | } | |
810 | ||
ccd979bd | 811 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
ccd979bd MF |
812 | struct ocfs2_alloc_context **ac) |
813 | { | |
814 | int status; | |
b89c5428 | 815 | int slot = ocfs2_get_inode_steal_slot(osb); |
feb473a6 | 816 | u64 alloc_group; |
ccd979bd | 817 | |
cd861280 | 818 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
819 | if (!(*ac)) { |
820 | status = -ENOMEM; | |
821 | mlog_errno(status); | |
822 | goto bail; | |
823 | } | |
824 | ||
825 | (*ac)->ac_bits_wanted = 1; | |
ccd979bd MF |
826 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
827 | ||
ccd979bd MF |
828 | (*ac)->ac_group_search = ocfs2_block_group_search; |
829 | ||
1187c968 JB |
830 | /* |
831 | * stat(2) can't handle i_ino > 32bits, so we tell the | |
832 | * lower levels not to allocate us a block group past that | |
12462f1d | 833 | * limit. The 'inode64' mount option avoids this behavior. |
1187c968 | 834 | */ |
12462f1d JB |
835 | if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) |
836 | (*ac)->ac_max_block = (u32)~0U; | |
1187c968 | 837 | |
4d0ddb2c TM |
838 | /* |
839 | * slot is set when we successfully steal inode from other nodes. | |
840 | * It is reset in 3 places: | |
841 | * 1. when we flush the truncate log | |
842 | * 2. when we complete local alloc recovery. | |
843 | * 3. when we successfully allocate from our own slot. | |
844 | * After it is set, we will go on stealing inodes until we find the | |
845 | * need to check our slots to see whether there is some space for us. | |
846 | */ | |
847 | if (slot != OCFS2_INVALID_SLOT && | |
b89c5428 | 848 | atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) |
4d0ddb2c TM |
849 | goto inode_steal; |
850 | ||
851 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
feb473a6 | 852 | alloc_group = osb->osb_inode_alloc_group; |
da5cbf2f MF |
853 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
854 | INODE_ALLOC_SYSTEM_INODE, | |
b89c5428 | 855 | (u32)osb->slot_num, |
feb473a6 | 856 | &alloc_group, |
60ca81e8 TM |
857 | ALLOC_NEW_GROUP | |
858 | ALLOC_GROUPS_FROM_GLOBAL); | |
4d0ddb2c TM |
859 | if (status >= 0) { |
860 | status = 0; | |
861 | ||
feb473a6 TM |
862 | spin_lock(&osb->osb_lock); |
863 | osb->osb_inode_alloc_group = alloc_group; | |
864 | spin_unlock(&osb->osb_lock); | |
865 | mlog(0, "after reservation, new allocation group is " | |
866 | "%llu\n", (unsigned long long)alloc_group); | |
867 | ||
4d0ddb2c TM |
868 | /* |
869 | * Some inodes must be freed by us, so try to allocate | |
870 | * from our own next time. | |
871 | */ | |
872 | if (slot != OCFS2_INVALID_SLOT) | |
873 | ocfs2_init_inode_steal_slot(osb); | |
874 | goto bail; | |
875 | } else if (status < 0 && status != -ENOSPC) { | |
876 | mlog_errno(status); | |
877 | goto bail; | |
878 | } | |
879 | ||
880 | ocfs2_free_ac_resource(*ac); | |
881 | ||
882 | inode_steal: | |
b89c5428 | 883 | status = ocfs2_steal_inode(osb, *ac); |
4d0ddb2c | 884 | atomic_inc(&osb->s_num_inodes_stolen); |
ccd979bd MF |
885 | if (status < 0) { |
886 | if (status != -ENOSPC) | |
887 | mlog_errno(status); | |
888 | goto bail; | |
889 | } | |
890 | ||
891 | status = 0; | |
892 | bail: | |
893 | if ((status < 0) && *ac) { | |
894 | ocfs2_free_alloc_context(*ac); | |
895 | *ac = NULL; | |
896 | } | |
897 | ||
ccd979bd MF |
898 | mlog_exit(status); |
899 | return status; | |
900 | } | |
901 | ||
902 | /* local alloc code has to do the same thing, so rather than do this | |
903 | * twice.. */ | |
904 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
905 | struct ocfs2_alloc_context *ac) | |
906 | { | |
907 | int status; | |
908 | ||
ccd979bd MF |
909 | ac->ac_which = OCFS2_AC_USE_MAIN; |
910 | ac->ac_group_search = ocfs2_cluster_group_search; | |
911 | ||
da5cbf2f MF |
912 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
913 | GLOBAL_BITMAP_SYSTEM_INODE, | |
feb473a6 | 914 | OCFS2_INVALID_SLOT, NULL, |
ffda89a3 | 915 | ALLOC_NEW_GROUP); |
da5cbf2f | 916 | if (status < 0 && status != -ENOSPC) { |
ccd979bd | 917 | mlog_errno(status); |
da5cbf2f MF |
918 | goto bail; |
919 | } | |
920 | ||
ccd979bd MF |
921 | bail: |
922 | return status; | |
923 | } | |
924 | ||
925 | /* Callers don't need to care which bitmap (local alloc or main) to | |
926 | * use so we figure it out for them, but unfortunately this clutters | |
927 | * things a bit. */ | |
1187c968 JB |
928 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
929 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 930 | int flags, |
1187c968 | 931 | struct ocfs2_alloc_context **ac) |
ccd979bd MF |
932 | { |
933 | int status; | |
934 | ||
935 | mlog_entry_void(); | |
936 | ||
cd861280 | 937 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
938 | if (!(*ac)) { |
939 | status = -ENOMEM; | |
940 | mlog_errno(status); | |
941 | goto bail; | |
942 | } | |
943 | ||
944 | (*ac)->ac_bits_wanted = bits_wanted; | |
1187c968 | 945 | (*ac)->ac_max_block = max_block; |
ccd979bd MF |
946 | |
947 | status = -ENOSPC; | |
60ca81e8 TM |
948 | if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && |
949 | ocfs2_alloc_should_use_local(osb, bits_wanted)) { | |
ccd979bd | 950 | status = ocfs2_reserve_local_alloc_bits(osb, |
ccd979bd MF |
951 | bits_wanted, |
952 | *ac); | |
1187c968 JB |
953 | if (status == -EFBIG) { |
954 | /* The local alloc window is outside ac_max_block. | |
955 | * use the main bitmap. */ | |
956 | status = -ENOSPC; | |
957 | } else if ((status < 0) && (status != -ENOSPC)) { | |
ccd979bd MF |
958 | mlog_errno(status); |
959 | goto bail; | |
ccd979bd MF |
960 | } |
961 | } | |
962 | ||
963 | if (status == -ENOSPC) { | |
964 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); | |
965 | if (status < 0) { | |
966 | if (status != -ENOSPC) | |
967 | mlog_errno(status); | |
968 | goto bail; | |
969 | } | |
970 | } | |
971 | ||
972 | status = 0; | |
973 | bail: | |
974 | if ((status < 0) && *ac) { | |
975 | ocfs2_free_alloc_context(*ac); | |
976 | *ac = NULL; | |
977 | } | |
978 | ||
979 | mlog_exit(status); | |
980 | return status; | |
981 | } | |
982 | ||
1187c968 JB |
983 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, |
984 | u32 bits_wanted, | |
985 | struct ocfs2_alloc_context **ac) | |
986 | { | |
60ca81e8 TM |
987 | return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, |
988 | ALLOC_NEW_GROUP, ac); | |
1187c968 JB |
989 | } |
990 | ||
ccd979bd MF |
991 | /* |
992 | * More or less lifted from ext3. I'll leave their description below: | |
993 | * | |
994 | * "For ext3 allocations, we must not reuse any blocks which are | |
995 | * allocated in the bitmap buffer's "last committed data" copy. This | |
996 | * prevents deletes from freeing up the page for reuse until we have | |
997 | * committed the delete transaction. | |
998 | * | |
999 | * If we didn't do this, then deleting something and reallocating it as | |
1000 | * data would allow the old block to be overwritten before the | |
1001 | * transaction committed (because we force data to disk before commit). | |
1002 | * This would lead to corruption if we crashed between overwriting the | |
1003 | * data and committing the delete. | |
1004 | * | |
1005 | * @@@ We may want to make this allocation behaviour conditional on | |
1006 | * data-writes at some point, and disable it for metadata allocations or | |
1007 | * sync-data inodes." | |
1008 | * | |
1009 | * Note: OCFS2 already does this differently for metadata vs data | |
c78bad11 | 1010 | * allocations, as those bitmaps are separate and undo access is never |
ccd979bd MF |
1011 | * called on a metadata group descriptor. |
1012 | */ | |
1013 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
1014 | int nr) | |
1015 | { | |
1016 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
94e41ecf | 1017 | int ret; |
ccd979bd MF |
1018 | |
1019 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) | |
1020 | return 0; | |
94e41ecf SM |
1021 | |
1022 | if (!buffer_jbd(bg_bh)) | |
ccd979bd MF |
1023 | return 1; |
1024 | ||
94e41ecf | 1025 | jbd_lock_bh_state(bg_bh); |
ccd979bd | 1026 | bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; |
94e41ecf SM |
1027 | if (bg) |
1028 | ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); | |
1029 | else | |
1030 | ret = 1; | |
1031 | jbd_unlock_bh_state(bg_bh); | |
1032 | ||
1033 | return ret; | |
ccd979bd MF |
1034 | } |
1035 | ||
1036 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, | |
1037 | struct buffer_head *bg_bh, | |
1038 | unsigned int bits_wanted, | |
7bf72ede | 1039 | unsigned int total_bits, |
ccd979bd MF |
1040 | u16 *bit_off, |
1041 | u16 *bits_found) | |
1042 | { | |
1043 | void *bitmap; | |
1044 | u16 best_offset, best_size; | |
1045 | int offset, start, found, status = 0; | |
1046 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1047 | ||
42035306 JB |
1048 | /* Callers got this descriptor from |
1049 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1050 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1051 | |
1052 | found = start = best_offset = best_size = 0; | |
1053 | bitmap = bg->bg_bitmap; | |
1054 | ||
7bf72ede MF |
1055 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
1056 | if (offset == total_bits) | |
ccd979bd MF |
1057 | break; |
1058 | ||
1059 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { | |
1060 | /* We found a zero, but we can't use it as it | |
1061 | * hasn't been put to disk yet! */ | |
1062 | found = 0; | |
1063 | start = offset + 1; | |
1064 | } else if (offset == start) { | |
1065 | /* we found a zero */ | |
1066 | found++; | |
1067 | /* move start to the next bit to test */ | |
1068 | start++; | |
1069 | } else { | |
1070 | /* got a zero after some ones */ | |
1071 | found = 1; | |
1072 | start = offset + 1; | |
1073 | } | |
1074 | if (found > best_size) { | |
1075 | best_size = found; | |
1076 | best_offset = start - found; | |
1077 | } | |
1078 | /* we got everything we needed */ | |
1079 | if (found == bits_wanted) { | |
1080 | /* mlog(0, "Found it all!\n"); */ | |
1081 | break; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* XXX: I think the first clause is equivalent to the second | |
1086 | * - jlbec */ | |
1087 | if (found == bits_wanted) { | |
1088 | *bit_off = start - found; | |
1089 | *bits_found = found; | |
1090 | } else if (best_size) { | |
1091 | *bit_off = best_offset; | |
1092 | *bits_found = best_size; | |
1093 | } else { | |
1094 | status = -ENOSPC; | |
1095 | /* No error log here -- see the comment above | |
1096 | * ocfs2_test_bg_bit_allocatable */ | |
1097 | } | |
1098 | ||
1099 | return status; | |
1100 | } | |
1101 | ||
1fabe148 | 1102 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
1103 | struct inode *alloc_inode, |
1104 | struct ocfs2_group_desc *bg, | |
1105 | struct buffer_head *group_bh, | |
1106 | unsigned int bit_off, | |
1107 | unsigned int num_bits) | |
1108 | { | |
1109 | int status; | |
1110 | void *bitmap = bg->bg_bitmap; | |
1111 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1112 | ||
1113 | mlog_entry_void(); | |
1114 | ||
42035306 JB |
1115 | /* All callers get the descriptor via |
1116 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1117 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1118 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); |
1119 | ||
1120 | mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, | |
1121 | num_bits); | |
1122 | ||
1123 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1124 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
1125 | ||
13723d00 | 1126 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 1127 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1128 | group_bh, |
1129 | journal_type); | |
ccd979bd MF |
1130 | if (status < 0) { |
1131 | mlog_errno(status); | |
1132 | goto bail; | |
1133 | } | |
1134 | ||
1135 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); | |
1136 | ||
1137 | while(num_bits--) | |
1138 | ocfs2_set_bit(bit_off++, bitmap); | |
1139 | ||
1140 | status = ocfs2_journal_dirty(handle, | |
1141 | group_bh); | |
1142 | if (status < 0) { | |
1143 | mlog_errno(status); | |
1144 | goto bail; | |
1145 | } | |
1146 | ||
1147 | bail: | |
1148 | mlog_exit(status); | |
1149 | return status; | |
1150 | } | |
1151 | ||
1152 | /* find the one with the most empty bits */ | |
1153 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) | |
1154 | { | |
1155 | u16 curr, best; | |
1156 | ||
1157 | BUG_ON(!cl->cl_next_free_rec); | |
1158 | ||
1159 | best = curr = 0; | |
1160 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { | |
1161 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > | |
1162 | le32_to_cpu(cl->cl_recs[best].c_free)) | |
1163 | best = curr; | |
1164 | curr++; | |
1165 | } | |
1166 | ||
1167 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); | |
1168 | return best; | |
1169 | } | |
1170 | ||
1fabe148 | 1171 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
1172 | struct inode *alloc_inode, |
1173 | struct buffer_head *fe_bh, | |
1174 | struct buffer_head *bg_bh, | |
1175 | struct buffer_head *prev_bg_bh, | |
1176 | u16 chain) | |
1177 | { | |
1178 | int status; | |
1179 | /* there is a really tiny chance the journal calls could fail, | |
1180 | * but we wouldn't want inconsistent blocks in *any* case. */ | |
1181 | u64 fe_ptr, bg_ptr, prev_bg_ptr; | |
1182 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
1183 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1184 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; | |
1185 | ||
42035306 JB |
1186 | /* The caller got these descriptors from |
1187 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1188 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
1189 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); | |
ccd979bd | 1190 | |
b0697053 | 1191 | mlog(0, "Suballoc %llu, chain %u, move group %llu to top, prev = %llu\n", |
1ca1a111 MF |
1192 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, |
1193 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1194 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); | |
ccd979bd MF |
1195 | |
1196 | fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno); | |
1197 | bg_ptr = le64_to_cpu(bg->bg_next_group); | |
1198 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); | |
1199 | ||
0cf2f763 JB |
1200 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1201 | prev_bg_bh, | |
13723d00 | 1202 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1203 | if (status < 0) { |
1204 | mlog_errno(status); | |
1205 | goto out_rollback; | |
1206 | } | |
1207 | ||
1208 | prev_bg->bg_next_group = bg->bg_next_group; | |
1209 | ||
1210 | status = ocfs2_journal_dirty(handle, prev_bg_bh); | |
1211 | if (status < 0) { | |
1212 | mlog_errno(status); | |
1213 | goto out_rollback; | |
1214 | } | |
1215 | ||
0cf2f763 JB |
1216 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1217 | bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1218 | if (status < 0) { |
1219 | mlog_errno(status); | |
1220 | goto out_rollback; | |
1221 | } | |
1222 | ||
1223 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; | |
1224 | ||
1225 | status = ocfs2_journal_dirty(handle, bg_bh); | |
1226 | if (status < 0) { | |
1227 | mlog_errno(status); | |
1228 | goto out_rollback; | |
1229 | } | |
1230 | ||
0cf2f763 JB |
1231 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
1232 | fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1233 | if (status < 0) { |
1234 | mlog_errno(status); | |
1235 | goto out_rollback; | |
1236 | } | |
1237 | ||
1238 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; | |
1239 | ||
1240 | status = ocfs2_journal_dirty(handle, fe_bh); | |
1241 | if (status < 0) { | |
1242 | mlog_errno(status); | |
1243 | goto out_rollback; | |
1244 | } | |
1245 | ||
1246 | status = 0; | |
1247 | out_rollback: | |
1248 | if (status < 0) { | |
1249 | fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr); | |
1250 | bg->bg_next_group = cpu_to_le64(bg_ptr); | |
1251 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); | |
1252 | } | |
42035306 | 1253 | |
ccd979bd MF |
1254 | mlog_exit(status); |
1255 | return status; | |
1256 | } | |
1257 | ||
1258 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
1259 | u32 wanted) | |
1260 | { | |
1261 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; | |
1262 | } | |
1263 | ||
1264 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 | |
1265 | * value on error. */ | |
1266 | static int ocfs2_cluster_group_search(struct inode *inode, | |
1267 | struct buffer_head *group_bh, | |
1268 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1269 | u64 max_block, |
ccd979bd MF |
1270 | u16 *bit_off, u16 *bits_found) |
1271 | { | |
1272 | int search = -ENOSPC; | |
1273 | int ret; | |
1187c968 | 1274 | u64 blkoff; |
7bf72ede | 1275 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
9c7af40b | 1276 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
ccd979bd | 1277 | u16 tmp_off, tmp_found; |
7bf72ede | 1278 | unsigned int max_bits, gd_cluster_off; |
ccd979bd MF |
1279 | |
1280 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1281 | ||
7bf72ede MF |
1282 | if (gd->bg_free_bits_count) { |
1283 | max_bits = le16_to_cpu(gd->bg_bits); | |
1284 | ||
1285 | /* Tail groups in cluster bitmaps which aren't cpg | |
1286 | * aligned are prone to partial extention by a failed | |
1287 | * fs resize. If the file system resize never got to | |
1288 | * update the dinode cluster count, then we don't want | |
1289 | * to trust any clusters past it, regardless of what | |
1290 | * the group descriptor says. */ | |
1291 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, | |
1292 | le64_to_cpu(gd->bg_blkno)); | |
1293 | if ((gd_cluster_off + max_bits) > | |
1294 | OCFS2_I(inode)->ip_clusters) { | |
1295 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; | |
1296 | mlog(0, "Desc %llu, bg_bits %u, clusters %u, use %u\n", | |
1297 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
1298 | le16_to_cpu(gd->bg_bits), | |
1299 | OCFS2_I(inode)->ip_clusters, max_bits); | |
1300 | } | |
1301 | ||
ccd979bd MF |
1302 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1303 | group_bh, bits_wanted, | |
7bf72ede | 1304 | max_bits, |
ccd979bd MF |
1305 | &tmp_off, &tmp_found); |
1306 | if (ret) | |
1307 | return ret; | |
1308 | ||
1187c968 JB |
1309 | if (max_block) { |
1310 | blkoff = ocfs2_clusters_to_blocks(inode->i_sb, | |
1311 | gd_cluster_off + | |
1312 | tmp_off + tmp_found); | |
1313 | mlog(0, "Checking %llu against %llu\n", | |
1314 | (unsigned long long)blkoff, | |
1315 | (unsigned long long)max_block); | |
1316 | if (blkoff > max_block) | |
1317 | return -ENOSPC; | |
1318 | } | |
1319 | ||
ccd979bd MF |
1320 | /* ocfs2_block_group_find_clear_bits() might |
1321 | * return success, but we still want to return | |
1322 | * -ENOSPC unless it found the minimum number | |
1323 | * of bits. */ | |
1324 | if (min_bits <= tmp_found) { | |
1325 | *bit_off = tmp_off; | |
1326 | *bits_found = tmp_found; | |
1327 | search = 0; /* success */ | |
9c7af40b MF |
1328 | } else if (tmp_found) { |
1329 | /* | |
1330 | * Don't show bits which we'll be returning | |
1331 | * for allocation to the local alloc bitmap. | |
1332 | */ | |
1333 | ocfs2_local_alloc_seen_free_bits(osb, tmp_found); | |
ccd979bd MF |
1334 | } |
1335 | } | |
1336 | ||
1337 | return search; | |
1338 | } | |
1339 | ||
1340 | static int ocfs2_block_group_search(struct inode *inode, | |
1341 | struct buffer_head *group_bh, | |
1342 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1343 | u64 max_block, |
ccd979bd MF |
1344 | u16 *bit_off, u16 *bits_found) |
1345 | { | |
1346 | int ret = -ENOSPC; | |
1187c968 | 1347 | u64 blkoff; |
ccd979bd MF |
1348 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; |
1349 | ||
1350 | BUG_ON(min_bits != 1); | |
1351 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); | |
1352 | ||
1187c968 | 1353 | if (bg->bg_free_bits_count) { |
ccd979bd MF |
1354 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1355 | group_bh, bits_wanted, | |
7bf72ede | 1356 | le16_to_cpu(bg->bg_bits), |
ccd979bd | 1357 | bit_off, bits_found); |
1187c968 JB |
1358 | if (!ret && max_block) { |
1359 | blkoff = le64_to_cpu(bg->bg_blkno) + *bit_off + | |
1360 | *bits_found; | |
1361 | mlog(0, "Checking %llu against %llu\n", | |
1362 | (unsigned long long)blkoff, | |
1363 | (unsigned long long)max_block); | |
1364 | if (blkoff > max_block) | |
1365 | ret = -ENOSPC; | |
1366 | } | |
1367 | } | |
ccd979bd MF |
1368 | |
1369 | return ret; | |
1370 | } | |
1371 | ||
883d4cae | 1372 | static int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
1fabe148 | 1373 | handle_t *handle, |
883d4cae MF |
1374 | struct buffer_head *di_bh, |
1375 | u32 num_bits, | |
1376 | u16 chain) | |
1377 | { | |
1378 | int ret; | |
1379 | u32 tmp_used; | |
1380 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1381 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; | |
1382 | ||
0cf2f763 | 1383 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
13723d00 | 1384 | OCFS2_JOURNAL_ACCESS_WRITE); |
883d4cae MF |
1385 | if (ret < 0) { |
1386 | mlog_errno(ret); | |
1387 | goto out; | |
1388 | } | |
1389 | ||
1390 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1391 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); | |
1392 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); | |
1393 | ||
1394 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1395 | if (ret < 0) | |
1396 | mlog_errno(ret); | |
1397 | ||
1398 | out: | |
1399 | return ret; | |
1400 | } | |
1401 | ||
1402 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, | |
1fabe148 | 1403 | handle_t *handle, |
883d4cae MF |
1404 | u32 bits_wanted, |
1405 | u32 min_bits, | |
1406 | u16 *bit_off, | |
1407 | unsigned int *num_bits, | |
1408 | u64 gd_blkno, | |
1409 | u16 *bits_left) | |
1410 | { | |
1411 | int ret; | |
1412 | u16 found; | |
1413 | struct buffer_head *group_bh = NULL; | |
1414 | struct ocfs2_group_desc *gd; | |
68f64d47 | 1415 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; |
883d4cae | 1416 | struct inode *alloc_inode = ac->ac_inode; |
883d4cae | 1417 | |
68f64d47 JB |
1418 | ret = ocfs2_read_group_descriptor(alloc_inode, di, gd_blkno, |
1419 | &group_bh); | |
883d4cae MF |
1420 | if (ret < 0) { |
1421 | mlog_errno(ret); | |
1422 | return ret; | |
1423 | } | |
1424 | ||
1425 | gd = (struct ocfs2_group_desc *) group_bh->b_data; | |
883d4cae | 1426 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, |
1187c968 | 1427 | ac->ac_max_block, bit_off, &found); |
883d4cae MF |
1428 | if (ret < 0) { |
1429 | if (ret != -ENOSPC) | |
1430 | mlog_errno(ret); | |
1431 | goto out; | |
1432 | } | |
1433 | ||
1434 | *num_bits = found; | |
1435 | ||
1436 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, | |
1437 | *num_bits, | |
1438 | le16_to_cpu(gd->bg_chain)); | |
1439 | if (ret < 0) { | |
1440 | mlog_errno(ret); | |
1441 | goto out; | |
1442 | } | |
1443 | ||
1444 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, | |
1445 | *bit_off, *num_bits); | |
1446 | if (ret < 0) | |
1447 | mlog_errno(ret); | |
1448 | ||
1449 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); | |
1450 | ||
1451 | out: | |
1452 | brelse(group_bh); | |
1453 | ||
1454 | return ret; | |
1455 | } | |
1456 | ||
ccd979bd | 1457 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
1fabe148 | 1458 | handle_t *handle, |
ccd979bd MF |
1459 | u32 bits_wanted, |
1460 | u32 min_bits, | |
1461 | u16 *bit_off, | |
1462 | unsigned int *num_bits, | |
883d4cae MF |
1463 | u64 *bg_blkno, |
1464 | u16 *bits_left) | |
ccd979bd MF |
1465 | { |
1466 | int status; | |
1467 | u16 chain, tmp_bits; | |
1468 | u32 tmp_used; | |
1469 | u64 next_group; | |
ccd979bd MF |
1470 | struct inode *alloc_inode = ac->ac_inode; |
1471 | struct buffer_head *group_bh = NULL; | |
1472 | struct buffer_head *prev_group_bh = NULL; | |
1473 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1474 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; | |
1475 | struct ocfs2_group_desc *bg; | |
1476 | ||
1477 | chain = ac->ac_chain; | |
b0697053 MF |
1478 | mlog(0, "trying to alloc %u bits from chain %u, inode %llu\n", |
1479 | bits_wanted, chain, | |
1480 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno); | |
ccd979bd | 1481 | |
68f64d47 JB |
1482 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1483 | le64_to_cpu(cl->cl_recs[chain].c_blkno), | |
1484 | &group_bh); | |
ccd979bd MF |
1485 | if (status < 0) { |
1486 | mlog_errno(status); | |
1487 | goto bail; | |
1488 | } | |
1489 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1490 | |
1491 | status = -ENOSPC; | |
1492 | /* for now, the chain search is a bit simplistic. We just use | |
1493 | * the 1st group with any empty bits. */ | |
1187c968 JB |
1494 | while ((status = ac->ac_group_search(alloc_inode, group_bh, |
1495 | bits_wanted, min_bits, | |
1496 | ac->ac_max_block, bit_off, | |
1497 | &tmp_bits)) == -ENOSPC) { | |
ccd979bd MF |
1498 | if (!bg->bg_next_group) |
1499 | break; | |
a81cb88b MF |
1500 | |
1501 | brelse(prev_group_bh); | |
1502 | prev_group_bh = NULL; | |
1503 | ||
ccd979bd MF |
1504 | next_group = le64_to_cpu(bg->bg_next_group); |
1505 | prev_group_bh = group_bh; | |
1506 | group_bh = NULL; | |
68f64d47 JB |
1507 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1508 | next_group, &group_bh); | |
ccd979bd MF |
1509 | if (status < 0) { |
1510 | mlog_errno(status); | |
1511 | goto bail; | |
1512 | } | |
1513 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1514 | } |
1515 | if (status < 0) { | |
1516 | if (status != -ENOSPC) | |
1517 | mlog_errno(status); | |
1518 | goto bail; | |
1519 | } | |
1520 | ||
b0697053 | 1521 | mlog(0, "alloc succeeds: we give %u bits from block group %llu\n", |
1ca1a111 | 1522 | tmp_bits, (unsigned long long)le64_to_cpu(bg->bg_blkno)); |
ccd979bd MF |
1523 | |
1524 | *num_bits = tmp_bits; | |
1525 | ||
1526 | BUG_ON(*num_bits == 0); | |
1527 | ||
1528 | /* | |
1529 | * Keep track of previous block descriptor read. When | |
1530 | * we find a target, if we have read more than X | |
1531 | * number of descriptors, and the target is reasonably | |
1532 | * empty, relink him to top of his chain. | |
1533 | * | |
1534 | * We've read 0 extra blocks and only send one more to | |
1535 | * the transaction, yet the next guy to search has a | |
1536 | * much easier time. | |
1537 | * | |
1538 | * Do this *after* figuring out how many bits we're taking out | |
1539 | * of our target group. | |
1540 | */ | |
1541 | if (ac->ac_allow_chain_relink && | |
1542 | (prev_group_bh) && | |
1543 | (ocfs2_block_group_reasonably_empty(bg, *num_bits))) { | |
1544 | status = ocfs2_relink_block_group(handle, alloc_inode, | |
1545 | ac->ac_bh, group_bh, | |
1546 | prev_group_bh, chain); | |
1547 | if (status < 0) { | |
1548 | mlog_errno(status); | |
1549 | goto bail; | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | /* Ok, claim our bits now: set the info on dinode, chainlist | |
1554 | * and then the group */ | |
13723d00 | 1555 | status = ocfs2_journal_access_di(handle, |
0cf2f763 | 1556 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1557 | ac->ac_bh, |
1558 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1559 | if (status < 0) { |
1560 | mlog_errno(status); | |
1561 | goto bail; | |
1562 | } | |
1563 | ||
1564 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
1565 | fe->id1.bitmap1.i_used = cpu_to_le32(*num_bits + tmp_used); | |
1566 | le32_add_cpu(&cl->cl_recs[chain].c_free, -(*num_bits)); | |
1567 | ||
1568 | status = ocfs2_journal_dirty(handle, | |
1569 | ac->ac_bh); | |
1570 | if (status < 0) { | |
1571 | mlog_errno(status); | |
1572 | goto bail; | |
1573 | } | |
1574 | ||
1575 | status = ocfs2_block_group_set_bits(handle, | |
1576 | alloc_inode, | |
1577 | bg, | |
1578 | group_bh, | |
1579 | *bit_off, | |
1580 | *num_bits); | |
1581 | if (status < 0) { | |
1582 | mlog_errno(status); | |
1583 | goto bail; | |
1584 | } | |
1585 | ||
b0697053 | 1586 | mlog(0, "Allocated %u bits from suballocator %llu\n", *num_bits, |
1ca1a111 | 1587 | (unsigned long long)le64_to_cpu(fe->i_blkno)); |
ccd979bd MF |
1588 | |
1589 | *bg_blkno = le64_to_cpu(bg->bg_blkno); | |
883d4cae | 1590 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
ccd979bd | 1591 | bail: |
a81cb88b MF |
1592 | brelse(group_bh); |
1593 | brelse(prev_group_bh); | |
ccd979bd MF |
1594 | |
1595 | mlog_exit(status); | |
1596 | return status; | |
1597 | } | |
1598 | ||
1599 | /* will give out up to bits_wanted contiguous bits. */ | |
1600 | static int ocfs2_claim_suballoc_bits(struct ocfs2_super *osb, | |
1601 | struct ocfs2_alloc_context *ac, | |
1fabe148 | 1602 | handle_t *handle, |
ccd979bd MF |
1603 | u32 bits_wanted, |
1604 | u32 min_bits, | |
1605 | u16 *bit_off, | |
1606 | unsigned int *num_bits, | |
1607 | u64 *bg_blkno) | |
1608 | { | |
1609 | int status; | |
1610 | u16 victim, i; | |
883d4cae MF |
1611 | u16 bits_left = 0; |
1612 | u64 hint_blkno = ac->ac_last_group; | |
ccd979bd MF |
1613 | struct ocfs2_chain_list *cl; |
1614 | struct ocfs2_dinode *fe; | |
1615 | ||
1616 | mlog_entry_void(); | |
1617 | ||
1618 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); | |
1619 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); | |
1620 | BUG_ON(!ac->ac_bh); | |
1621 | ||
1622 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
10995aa2 JB |
1623 | |
1624 | /* The bh was validated by the inode read during | |
1625 | * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ | |
1626 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
1627 | ||
ccd979bd MF |
1628 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= |
1629 | le32_to_cpu(fe->id1.bitmap1.i_total)) { | |
b0697053 MF |
1630 | ocfs2_error(osb->sb, "Chain allocator dinode %llu has %u used " |
1631 | "bits but only %u total.", | |
1632 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
ccd979bd MF |
1633 | le32_to_cpu(fe->id1.bitmap1.i_used), |
1634 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
1635 | status = -EIO; | |
1636 | goto bail; | |
1637 | } | |
1638 | ||
883d4cae MF |
1639 | if (hint_blkno) { |
1640 | /* Attempt to short-circuit the usual search mechanism | |
1641 | * by jumping straight to the most recently used | |
1642 | * allocation group. This helps us mantain some | |
1643 | * contiguousness across allocations. */ | |
da5cbf2f MF |
1644 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
1645 | min_bits, bit_off, num_bits, | |
883d4cae MF |
1646 | hint_blkno, &bits_left); |
1647 | if (!status) { | |
1648 | /* Be careful to update *bg_blkno here as the | |
1649 | * caller is expecting it to be filled in, and | |
1650 | * ocfs2_search_one_group() won't do that for | |
1651 | * us. */ | |
1652 | *bg_blkno = hint_blkno; | |
1653 | goto set_hint; | |
1654 | } | |
1655 | if (status < 0 && status != -ENOSPC) { | |
1656 | mlog_errno(status); | |
1657 | goto bail; | |
1658 | } | |
1659 | } | |
1660 | ||
ccd979bd MF |
1661 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
1662 | ||
1663 | victim = ocfs2_find_victim_chain(cl); | |
1664 | ac->ac_chain = victim; | |
1665 | ac->ac_allow_chain_relink = 1; | |
1666 | ||
da5cbf2f | 1667 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, bit_off, |
883d4cae | 1668 | num_bits, bg_blkno, &bits_left); |
ccd979bd | 1669 | if (!status) |
883d4cae | 1670 | goto set_hint; |
ccd979bd MF |
1671 | if (status < 0 && status != -ENOSPC) { |
1672 | mlog_errno(status); | |
1673 | goto bail; | |
1674 | } | |
1675 | ||
1676 | mlog(0, "Search of victim chain %u came up with nothing, " | |
1677 | "trying all chains now.\n", victim); | |
1678 | ||
1679 | /* If we didn't pick a good victim, then just default to | |
1680 | * searching each chain in order. Don't allow chain relinking | |
1681 | * because we only calculate enough journal credits for one | |
1682 | * relink per alloc. */ | |
1683 | ac->ac_allow_chain_relink = 0; | |
1684 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { | |
1685 | if (i == victim) | |
1686 | continue; | |
1687 | if (!cl->cl_recs[i].c_free) | |
1688 | continue; | |
1689 | ||
1690 | ac->ac_chain = i; | |
da5cbf2f | 1691 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
883d4cae MF |
1692 | bit_off, num_bits, bg_blkno, |
1693 | &bits_left); | |
ccd979bd MF |
1694 | if (!status) |
1695 | break; | |
1696 | if (status < 0 && status != -ENOSPC) { | |
1697 | mlog_errno(status); | |
1698 | goto bail; | |
1699 | } | |
1700 | } | |
ccd979bd | 1701 | |
883d4cae MF |
1702 | set_hint: |
1703 | if (status != -ENOSPC) { | |
1704 | /* If the next search of this group is not likely to | |
1705 | * yield a suitable extent, then we reset the last | |
1706 | * group hint so as to not waste a disk read */ | |
1707 | if (bits_left < min_bits) | |
1708 | ac->ac_last_group = 0; | |
1709 | else | |
1710 | ac->ac_last_group = *bg_blkno; | |
1711 | } | |
1712 | ||
1713 | bail: | |
ccd979bd MF |
1714 | mlog_exit(status); |
1715 | return status; | |
1716 | } | |
1717 | ||
1718 | int ocfs2_claim_metadata(struct ocfs2_super *osb, | |
1fabe148 | 1719 | handle_t *handle, |
ccd979bd MF |
1720 | struct ocfs2_alloc_context *ac, |
1721 | u32 bits_wanted, | |
1722 | u16 *suballoc_bit_start, | |
1723 | unsigned int *num_bits, | |
1724 | u64 *blkno_start) | |
1725 | { | |
1726 | int status; | |
1727 | u64 bg_blkno; | |
1728 | ||
1729 | BUG_ON(!ac); | |
1730 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); | |
1731 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); | |
ccd979bd MF |
1732 | |
1733 | status = ocfs2_claim_suballoc_bits(osb, | |
1734 | ac, | |
da5cbf2f | 1735 | handle, |
ccd979bd MF |
1736 | bits_wanted, |
1737 | 1, | |
1738 | suballoc_bit_start, | |
1739 | num_bits, | |
1740 | &bg_blkno); | |
1741 | if (status < 0) { | |
1742 | mlog_errno(status); | |
1743 | goto bail; | |
1744 | } | |
1745 | atomic_inc(&osb->alloc_stats.bg_allocs); | |
1746 | ||
1747 | *blkno_start = bg_blkno + (u64) *suballoc_bit_start; | |
1748 | ac->ac_bits_given += (*num_bits); | |
1749 | status = 0; | |
1750 | bail: | |
1751 | mlog_exit(status); | |
1752 | return status; | |
1753 | } | |
1754 | ||
13821151 TM |
1755 | static void ocfs2_init_inode_ac_group(struct inode *dir, |
1756 | struct buffer_head *parent_fe_bh, | |
1757 | struct ocfs2_alloc_context *ac) | |
1758 | { | |
1759 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *)parent_fe_bh->b_data; | |
1760 | /* | |
1761 | * Try to allocate inodes from some specific group. | |
1762 | * | |
1763 | * If the parent dir has recorded the last group used in allocation, | |
1764 | * cool, use it. Otherwise if we try to allocate new inode from the | |
1765 | * same slot the parent dir belongs to, use the same chunk. | |
1766 | * | |
1767 | * We are very careful here to avoid the mistake of setting | |
1768 | * ac_last_group to a group descriptor from a different (unlocked) slot. | |
1769 | */ | |
1770 | if (OCFS2_I(dir)->ip_last_used_group && | |
1771 | OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) | |
1772 | ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; | |
1773 | else if (le16_to_cpu(fe->i_suballoc_slot) == ac->ac_alloc_slot) | |
1774 | ac->ac_last_group = ocfs2_which_suballoc_group( | |
1775 | le64_to_cpu(fe->i_blkno), | |
1776 | le16_to_cpu(fe->i_suballoc_bit)); | |
1777 | } | |
1778 | ||
1779 | static inline void ocfs2_save_inode_ac_group(struct inode *dir, | |
1780 | struct ocfs2_alloc_context *ac) | |
1781 | { | |
1782 | OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; | |
1783 | OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; | |
1784 | } | |
1785 | ||
ccd979bd | 1786 | int ocfs2_claim_new_inode(struct ocfs2_super *osb, |
1fabe148 | 1787 | handle_t *handle, |
13821151 TM |
1788 | struct inode *dir, |
1789 | struct buffer_head *parent_fe_bh, | |
ccd979bd MF |
1790 | struct ocfs2_alloc_context *ac, |
1791 | u16 *suballoc_bit, | |
1792 | u64 *fe_blkno) | |
1793 | { | |
1794 | int status; | |
1795 | unsigned int num_bits; | |
1796 | u64 bg_blkno; | |
1797 | ||
1798 | mlog_entry_void(); | |
1799 | ||
1800 | BUG_ON(!ac); | |
1801 | BUG_ON(ac->ac_bits_given != 0); | |
1802 | BUG_ON(ac->ac_bits_wanted != 1); | |
1803 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
ccd979bd | 1804 | |
13821151 TM |
1805 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); |
1806 | ||
ccd979bd MF |
1807 | status = ocfs2_claim_suballoc_bits(osb, |
1808 | ac, | |
da5cbf2f | 1809 | handle, |
ccd979bd MF |
1810 | 1, |
1811 | 1, | |
1812 | suballoc_bit, | |
1813 | &num_bits, | |
1814 | &bg_blkno); | |
1815 | if (status < 0) { | |
1816 | mlog_errno(status); | |
1817 | goto bail; | |
1818 | } | |
1819 | atomic_inc(&osb->alloc_stats.bg_allocs); | |
1820 | ||
1821 | BUG_ON(num_bits != 1); | |
1822 | ||
1823 | *fe_blkno = bg_blkno + (u64) (*suballoc_bit); | |
1824 | ac->ac_bits_given++; | |
13821151 | 1825 | ocfs2_save_inode_ac_group(dir, ac); |
ccd979bd MF |
1826 | status = 0; |
1827 | bail: | |
1828 | mlog_exit(status); | |
1829 | return status; | |
1830 | } | |
1831 | ||
1832 | /* translate a group desc. blkno and it's bitmap offset into | |
1833 | * disk cluster offset. */ | |
1834 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, | |
1835 | u64 bg_blkno, | |
1836 | u16 bg_bit_off) | |
1837 | { | |
1838 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1839 | u32 cluster = 0; | |
1840 | ||
1841 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1842 | ||
1843 | if (bg_blkno != osb->first_cluster_group_blkno) | |
1844 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); | |
1845 | cluster += (u32) bg_bit_off; | |
1846 | return cluster; | |
1847 | } | |
1848 | ||
1849 | /* given a cluster offset, calculate which block group it belongs to | |
1850 | * and return that block offset. */ | |
d659072f | 1851 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
ccd979bd MF |
1852 | { |
1853 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1854 | u32 group_no; | |
1855 | ||
1856 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1857 | ||
1858 | group_no = cluster / osb->bitmap_cpg; | |
1859 | if (!group_no) | |
1860 | return osb->first_cluster_group_blkno; | |
1861 | return ocfs2_clusters_to_blocks(inode->i_sb, | |
1862 | group_no * osb->bitmap_cpg); | |
1863 | } | |
1864 | ||
1865 | /* given the block number of a cluster start, calculate which cluster | |
1866 | * group and descriptor bitmap offset that corresponds to. */ | |
1867 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, | |
1868 | u64 data_blkno, | |
1869 | u64 *bg_blkno, | |
1870 | u16 *bg_bit_off) | |
1871 | { | |
1872 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1873 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); | |
1874 | ||
1875 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1876 | ||
1877 | *bg_blkno = ocfs2_which_cluster_group(inode, | |
1878 | data_cluster); | |
1879 | ||
1880 | if (*bg_blkno == osb->first_cluster_group_blkno) | |
1881 | *bg_bit_off = (u16) data_cluster; | |
1882 | else | |
1883 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, | |
1884 | data_blkno - *bg_blkno); | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * min_bits - minimum contiguous chunk from this total allocation we | |
1889 | * can handle. set to what we asked for originally for a full | |
1890 | * contig. allocation, set to '1' to indicate we can deal with extents | |
1891 | * of any size. | |
1892 | */ | |
415cb800 MF |
1893 | int __ocfs2_claim_clusters(struct ocfs2_super *osb, |
1894 | handle_t *handle, | |
1895 | struct ocfs2_alloc_context *ac, | |
1896 | u32 min_clusters, | |
1897 | u32 max_clusters, | |
1898 | u32 *cluster_start, | |
1899 | u32 *num_clusters) | |
ccd979bd MF |
1900 | { |
1901 | int status; | |
415cb800 | 1902 | unsigned int bits_wanted = max_clusters; |
883d4cae | 1903 | u64 bg_blkno = 0; |
ccd979bd MF |
1904 | u16 bg_bit_off; |
1905 | ||
1906 | mlog_entry_void(); | |
1907 | ||
ccd979bd MF |
1908 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
1909 | ||
1910 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL | |
1911 | && ac->ac_which != OCFS2_AC_USE_MAIN); | |
ccd979bd MF |
1912 | |
1913 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { | |
1914 | status = ocfs2_claim_local_alloc_bits(osb, | |
1915 | handle, | |
1916 | ac, | |
1917 | bits_wanted, | |
1918 | cluster_start, | |
1919 | num_clusters); | |
1920 | if (!status) | |
1921 | atomic_inc(&osb->alloc_stats.local_data); | |
1922 | } else { | |
1923 | if (min_clusters > (osb->bitmap_cpg - 1)) { | |
1924 | /* The only paths asking for contiguousness | |
1925 | * should know about this already. */ | |
2fbe8d1e SM |
1926 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
1927 | "group bitmap size %u!\n", min_clusters, | |
1928 | osb->bitmap_cpg); | |
ccd979bd MF |
1929 | status = -ENOSPC; |
1930 | goto bail; | |
1931 | } | |
1932 | /* clamp the current request down to a realistic size. */ | |
1933 | if (bits_wanted > (osb->bitmap_cpg - 1)) | |
1934 | bits_wanted = osb->bitmap_cpg - 1; | |
1935 | ||
1936 | status = ocfs2_claim_suballoc_bits(osb, | |
1937 | ac, | |
da5cbf2f | 1938 | handle, |
ccd979bd MF |
1939 | bits_wanted, |
1940 | min_clusters, | |
1941 | &bg_bit_off, | |
1942 | num_clusters, | |
1943 | &bg_blkno); | |
1944 | if (!status) { | |
1945 | *cluster_start = | |
1946 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, | |
1947 | bg_blkno, | |
1948 | bg_bit_off); | |
1949 | atomic_inc(&osb->alloc_stats.bitmap_data); | |
1950 | } | |
1951 | } | |
1952 | if (status < 0) { | |
1953 | if (status != -ENOSPC) | |
1954 | mlog_errno(status); | |
1955 | goto bail; | |
1956 | } | |
1957 | ||
1958 | ac->ac_bits_given += *num_clusters; | |
1959 | ||
1960 | bail: | |
1961 | mlog_exit(status); | |
1962 | return status; | |
1963 | } | |
1964 | ||
415cb800 MF |
1965 | int ocfs2_claim_clusters(struct ocfs2_super *osb, |
1966 | handle_t *handle, | |
1967 | struct ocfs2_alloc_context *ac, | |
1968 | u32 min_clusters, | |
1969 | u32 *cluster_start, | |
1970 | u32 *num_clusters) | |
1971 | { | |
1972 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; | |
1973 | ||
1974 | return __ocfs2_claim_clusters(osb, handle, ac, min_clusters, | |
1975 | bits_wanted, cluster_start, num_clusters); | |
1976 | } | |
1977 | ||
1fabe148 | 1978 | static inline int ocfs2_block_group_clear_bits(handle_t *handle, |
ccd979bd MF |
1979 | struct inode *alloc_inode, |
1980 | struct ocfs2_group_desc *bg, | |
1981 | struct buffer_head *group_bh, | |
1982 | unsigned int bit_off, | |
1983 | unsigned int num_bits) | |
1984 | { | |
1985 | int status; | |
1986 | unsigned int tmp; | |
1987 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1988 | struct ocfs2_group_desc *undo_bg = NULL; | |
94e41ecf | 1989 | int cluster_bitmap = 0; |
ccd979bd MF |
1990 | |
1991 | mlog_entry_void(); | |
1992 | ||
42035306 JB |
1993 | /* The caller got this descriptor from |
1994 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1995 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1996 | |
1997 | mlog(0, "off = %u, num = %u\n", bit_off, num_bits); | |
1998 | ||
1999 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
2000 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
2001 | ||
0cf2f763 JB |
2002 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
2003 | group_bh, journal_type); | |
ccd979bd MF |
2004 | if (status < 0) { |
2005 | mlog_errno(status); | |
2006 | goto bail; | |
2007 | } | |
2008 | ||
2009 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
94e41ecf SM |
2010 | cluster_bitmap = 1; |
2011 | ||
2012 | if (cluster_bitmap) { | |
2013 | jbd_lock_bh_state(group_bh); | |
2014 | undo_bg = (struct ocfs2_group_desc *) | |
2015 | bh2jh(group_bh)->b_committed_data; | |
2016 | BUG_ON(!undo_bg); | |
2017 | } | |
ccd979bd MF |
2018 | |
2019 | tmp = num_bits; | |
2020 | while(tmp--) { | |
2021 | ocfs2_clear_bit((bit_off + tmp), | |
2022 | (unsigned long *) bg->bg_bitmap); | |
94e41ecf | 2023 | if (cluster_bitmap) |
ccd979bd MF |
2024 | ocfs2_set_bit(bit_off + tmp, |
2025 | (unsigned long *) undo_bg->bg_bitmap); | |
2026 | } | |
2027 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); | |
2028 | ||
94e41ecf SM |
2029 | if (cluster_bitmap) |
2030 | jbd_unlock_bh_state(group_bh); | |
2031 | ||
ccd979bd MF |
2032 | status = ocfs2_journal_dirty(handle, group_bh); |
2033 | if (status < 0) | |
2034 | mlog_errno(status); | |
2035 | bail: | |
2036 | return status; | |
2037 | } | |
2038 | ||
2039 | /* | |
2040 | * expects the suballoc inode to already be locked. | |
2041 | */ | |
2b604351 MF |
2042 | int ocfs2_free_suballoc_bits(handle_t *handle, |
2043 | struct inode *alloc_inode, | |
2044 | struct buffer_head *alloc_bh, | |
2045 | unsigned int start_bit, | |
2046 | u64 bg_blkno, | |
2047 | unsigned int count) | |
ccd979bd MF |
2048 | { |
2049 | int status = 0; | |
2050 | u32 tmp_used; | |
ccd979bd MF |
2051 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; |
2052 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; | |
2053 | struct buffer_head *group_bh = NULL; | |
2054 | struct ocfs2_group_desc *group; | |
2055 | ||
2056 | mlog_entry_void(); | |
2057 | ||
10995aa2 JB |
2058 | /* The alloc_bh comes from ocfs2_free_dinode() or |
2059 | * ocfs2_free_clusters(). The callers have all locked the | |
2060 | * allocator and gotten alloc_bh from the lock call. This | |
2061 | * validates the dinode buffer. Any corruption that has happended | |
2062 | * is a code bug. */ | |
2063 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
ccd979bd MF |
2064 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); |
2065 | ||
b0697053 MF |
2066 | mlog(0, "%llu: freeing %u bits from group %llu, starting at %u\n", |
2067 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count, | |
2068 | (unsigned long long)bg_blkno, start_bit); | |
ccd979bd | 2069 | |
68f64d47 JB |
2070 | status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, |
2071 | &group_bh); | |
ccd979bd MF |
2072 | if (status < 0) { |
2073 | mlog_errno(status); | |
2074 | goto bail; | |
2075 | } | |
ccd979bd | 2076 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
68f64d47 | 2077 | |
ccd979bd MF |
2078 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); |
2079 | ||
2080 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, | |
2081 | group, group_bh, | |
2082 | start_bit, count); | |
2083 | if (status < 0) { | |
2084 | mlog_errno(status); | |
2085 | goto bail; | |
2086 | } | |
2087 | ||
0cf2f763 JB |
2088 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
2089 | alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2090 | if (status < 0) { |
2091 | mlog_errno(status); | |
2092 | goto bail; | |
2093 | } | |
2094 | ||
2095 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, | |
2096 | count); | |
2097 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
2098 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); | |
2099 | ||
2100 | status = ocfs2_journal_dirty(handle, alloc_bh); | |
2101 | if (status < 0) { | |
2102 | mlog_errno(status); | |
2103 | goto bail; | |
2104 | } | |
2105 | ||
2106 | bail: | |
a81cb88b | 2107 | brelse(group_bh); |
ccd979bd MF |
2108 | |
2109 | mlog_exit(status); | |
2110 | return status; | |
2111 | } | |
2112 | ||
1fabe148 | 2113 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
2114 | struct inode *inode_alloc_inode, |
2115 | struct buffer_head *inode_alloc_bh, | |
2116 | struct ocfs2_dinode *di) | |
2117 | { | |
2118 | u64 blk = le64_to_cpu(di->i_blkno); | |
2119 | u16 bit = le16_to_cpu(di->i_suballoc_bit); | |
2120 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2121 | ||
2122 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, | |
2123 | inode_alloc_bh, bit, bg_blkno, 1); | |
2124 | } | |
2125 | ||
1fabe148 | 2126 | int ocfs2_free_clusters(handle_t *handle, |
ccd979bd MF |
2127 | struct inode *bitmap_inode, |
2128 | struct buffer_head *bitmap_bh, | |
2129 | u64 start_blk, | |
2130 | unsigned int num_clusters) | |
2131 | { | |
2132 | int status; | |
2133 | u16 bg_start_bit; | |
2134 | u64 bg_blkno; | |
2135 | struct ocfs2_dinode *fe; | |
2136 | ||
2137 | /* You can't ever have a contiguous set of clusters | |
2138 | * bigger than a block group bitmap so we never have to worry | |
2139 | * about looping on them. */ | |
2140 | ||
2141 | mlog_entry_void(); | |
2142 | ||
2143 | /* This is expensive. We can safely remove once this stuff has | |
2144 | * gotten tested really well. */ | |
2145 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); | |
2146 | ||
2147 | fe = (struct ocfs2_dinode *) bitmap_bh->b_data; | |
2148 | ||
2149 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, | |
2150 | &bg_start_bit); | |
2151 | ||
b0697053 MF |
2152 | mlog(0, "want to free %u clusters starting at block %llu\n", |
2153 | num_clusters, (unsigned long long)start_blk); | |
2154 | mlog(0, "bg_blkno = %llu, bg_start_bit = %u\n", | |
2155 | (unsigned long long)bg_blkno, bg_start_bit); | |
ccd979bd MF |
2156 | |
2157 | status = ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, | |
2158 | bg_start_bit, bg_blkno, | |
2159 | num_clusters); | |
9c7af40b | 2160 | if (status < 0) { |
ccd979bd | 2161 | mlog_errno(status); |
9c7af40b MF |
2162 | goto out; |
2163 | } | |
2164 | ||
2165 | ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), | |
2166 | num_clusters); | |
ccd979bd | 2167 | |
9c7af40b | 2168 | out: |
ccd979bd MF |
2169 | mlog_exit(status); |
2170 | return status; | |
2171 | } | |
2172 | ||
2173 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) | |
2174 | { | |
2175 | printk("Block Group:\n"); | |
2176 | printk("bg_signature: %s\n", bg->bg_signature); | |
2177 | printk("bg_size: %u\n", bg->bg_size); | |
2178 | printk("bg_bits: %u\n", bg->bg_bits); | |
2179 | printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); | |
2180 | printk("bg_chain: %u\n", bg->bg_chain); | |
2181 | printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); | |
b0697053 MF |
2182 | printk("bg_next_group: %llu\n", |
2183 | (unsigned long long)bg->bg_next_group); | |
2184 | printk("bg_parent_dinode: %llu\n", | |
2185 | (unsigned long long)bg->bg_parent_dinode); | |
2186 | printk("bg_blkno: %llu\n", | |
2187 | (unsigned long long)bg->bg_blkno); | |
ccd979bd MF |
2188 | } |
2189 | ||
2190 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) | |
2191 | { | |
2192 | int i; | |
2193 | ||
b0697053 | 2194 | printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); |
ccd979bd | 2195 | printk("i_signature: %s\n", fe->i_signature); |
b0697053 MF |
2196 | printk("i_size: %llu\n", |
2197 | (unsigned long long)fe->i_size); | |
ccd979bd MF |
2198 | printk("i_clusters: %u\n", fe->i_clusters); |
2199 | printk("i_generation: %u\n", | |
2200 | le32_to_cpu(fe->i_generation)); | |
2201 | printk("id1.bitmap1.i_used: %u\n", | |
2202 | le32_to_cpu(fe->id1.bitmap1.i_used)); | |
2203 | printk("id1.bitmap1.i_total: %u\n", | |
2204 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
2205 | printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); | |
2206 | printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); | |
2207 | printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); | |
2208 | printk("id2.i_chain.cl_next_free_rec: %u\n", | |
2209 | fe->id2.i_chain.cl_next_free_rec); | |
2210 | for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { | |
2211 | printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, | |
2212 | fe->id2.i_chain.cl_recs[i].c_free); | |
2213 | printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, | |
2214 | fe->id2.i_chain.cl_recs[i].c_total); | |
b0697053 MF |
2215 | printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, |
2216 | (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); | |
ccd979bd MF |
2217 | } |
2218 | } | |
e7d4cb6b TM |
2219 | |
2220 | /* | |
2221 | * For a given allocation, determine which allocators will need to be | |
2222 | * accessed, and lock them, reserving the appropriate number of bits. | |
2223 | * | |
2224 | * Sparse file systems call this from ocfs2_write_begin_nolock() | |
2225 | * and ocfs2_allocate_unwritten_extents(). | |
2226 | * | |
2227 | * File systems which don't support holes call this from | |
2228 | * ocfs2_extend_allocation(). | |
2229 | */ | |
f99b9b7c JB |
2230 | int ocfs2_lock_allocators(struct inode *inode, |
2231 | struct ocfs2_extent_tree *et, | |
e7d4cb6b TM |
2232 | u32 clusters_to_add, u32 extents_to_split, |
2233 | struct ocfs2_alloc_context **data_ac, | |
f99b9b7c | 2234 | struct ocfs2_alloc_context **meta_ac) |
e7d4cb6b TM |
2235 | { |
2236 | int ret = 0, num_free_extents; | |
2237 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; | |
2238 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2239 | ||
2240 | *meta_ac = NULL; | |
2241 | if (data_ac) | |
2242 | *data_ac = NULL; | |
2243 | ||
2244 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); | |
2245 | ||
3d03a305 | 2246 | num_free_extents = ocfs2_num_free_extents(osb, et); |
e7d4cb6b TM |
2247 | if (num_free_extents < 0) { |
2248 | ret = num_free_extents; | |
2249 | mlog_errno(ret); | |
2250 | goto out; | |
2251 | } | |
2252 | ||
2253 | /* | |
2254 | * Sparse allocation file systems need to be more conservative | |
2255 | * with reserving room for expansion - the actual allocation | |
2256 | * happens while we've got a journal handle open so re-taking | |
2257 | * a cluster lock (because we ran out of room for another | |
2258 | * extent) will violate ordering rules. | |
2259 | * | |
2260 | * Most of the time we'll only be seeing this 1 cluster at a time | |
2261 | * anyway. | |
2262 | * | |
2263 | * Always lock for any unwritten extents - we might want to | |
2264 | * add blocks during a split. | |
2265 | */ | |
2266 | if (!num_free_extents || | |
2267 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { | |
f99b9b7c | 2268 | ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); |
e7d4cb6b TM |
2269 | if (ret < 0) { |
2270 | if (ret != -ENOSPC) | |
2271 | mlog_errno(ret); | |
2272 | goto out; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | if (clusters_to_add == 0) | |
2277 | goto out; | |
2278 | ||
2279 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); | |
2280 | if (ret < 0) { | |
2281 | if (ret != -ENOSPC) | |
2282 | mlog_errno(ret); | |
2283 | goto out; | |
2284 | } | |
2285 | ||
2286 | out: | |
2287 | if (ret) { | |
2288 | if (*meta_ac) { | |
2289 | ocfs2_free_alloc_context(*meta_ac); | |
2290 | *meta_ac = NULL; | |
2291 | } | |
2292 | ||
2293 | /* | |
2294 | * We cannot have an error and a non null *data_ac. | |
2295 | */ | |
2296 | } | |
2297 | ||
2298 | return ret; | |
2299 | } | |
6ca497a8 | 2300 | |
2301 | /* | |
2302 | * Read the inode specified by blkno to get suballoc_slot and | |
2303 | * suballoc_bit. | |
2304 | */ | |
2305 | static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, | |
2306 | u16 *suballoc_slot, u16 *suballoc_bit) | |
2307 | { | |
2308 | int status; | |
2309 | struct buffer_head *inode_bh = NULL; | |
2310 | struct ocfs2_dinode *inode_fe; | |
2311 | ||
5b09b507 | 2312 | mlog_entry("blkno: %llu\n", (unsigned long long)blkno); |
6ca497a8 | 2313 | |
2314 | /* dirty read disk */ | |
2315 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); | |
2316 | if (status < 0) { | |
5b09b507 JB |
2317 | mlog(ML_ERROR, "read block %llu failed %d\n", |
2318 | (unsigned long long)blkno, status); | |
6ca497a8 | 2319 | goto bail; |
2320 | } | |
2321 | ||
2322 | inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; | |
2323 | if (!OCFS2_IS_VALID_DINODE(inode_fe)) { | |
5b09b507 JB |
2324 | mlog(ML_ERROR, "invalid inode %llu requested\n", |
2325 | (unsigned long long)blkno); | |
6ca497a8 | 2326 | status = -EINVAL; |
2327 | goto bail; | |
2328 | } | |
2329 | ||
0fba8137 | 2330 | if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && |
6ca497a8 | 2331 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { |
2332 | mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", | |
5b09b507 JB |
2333 | (unsigned long long)blkno, |
2334 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); | |
6ca497a8 | 2335 | status = -EINVAL; |
2336 | goto bail; | |
2337 | } | |
2338 | ||
2339 | if (suballoc_slot) | |
2340 | *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); | |
2341 | if (suballoc_bit) | |
2342 | *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); | |
2343 | ||
2344 | bail: | |
2345 | brelse(inode_bh); | |
2346 | ||
2347 | mlog_exit(status); | |
2348 | return status; | |
2349 | } | |
2350 | ||
2351 | /* | |
2352 | * test whether bit is SET in allocator bitmap or not. on success, 0 | |
2353 | * is returned and *res is 1 for SET; 0 otherwise. when fails, errno | |
2354 | * is returned and *res is meaningless. Call this after you have | |
2355 | * cluster locked against suballoc, or you may get a result based on | |
2356 | * non-up2date contents | |
2357 | */ | |
2358 | static int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, | |
2359 | struct inode *suballoc, | |
2360 | struct buffer_head *alloc_bh, u64 blkno, | |
2361 | u16 bit, int *res) | |
2362 | { | |
2363 | struct ocfs2_dinode *alloc_fe; | |
2364 | struct ocfs2_group_desc *group; | |
2365 | struct buffer_head *group_bh = NULL; | |
2366 | u64 bg_blkno; | |
2367 | int status; | |
2368 | ||
5b09b507 JB |
2369 | mlog_entry("blkno: %llu bit: %u\n", (unsigned long long)blkno, |
2370 | (unsigned int)bit); | |
6ca497a8 | 2371 | |
2372 | alloc_fe = (struct ocfs2_dinode *)alloc_bh->b_data; | |
2373 | if ((bit + 1) > ocfs2_bits_per_group(&alloc_fe->id2.i_chain)) { | |
2374 | mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", | |
2375 | (unsigned int)bit, | |
2376 | ocfs2_bits_per_group(&alloc_fe->id2.i_chain)); | |
2377 | status = -EINVAL; | |
2378 | goto bail; | |
2379 | } | |
2380 | ||
2381 | bg_blkno = ocfs2_which_suballoc_group(blkno, bit); | |
2382 | status = ocfs2_read_group_descriptor(suballoc, alloc_fe, bg_blkno, | |
2383 | &group_bh); | |
2384 | if (status < 0) { | |
5b09b507 JB |
2385 | mlog(ML_ERROR, "read group %llu failed %d\n", |
2386 | (unsigned long long)bg_blkno, status); | |
6ca497a8 | 2387 | goto bail; |
2388 | } | |
2389 | ||
2390 | group = (struct ocfs2_group_desc *) group_bh->b_data; | |
2391 | *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); | |
2392 | ||
2393 | bail: | |
2394 | brelse(group_bh); | |
2395 | ||
2396 | mlog_exit(status); | |
2397 | return status; | |
2398 | } | |
2399 | ||
2400 | /* | |
2401 | * Test if the bit representing this inode (blkno) is set in the | |
2402 | * suballocator. | |
2403 | * | |
2404 | * On success, 0 is returned and *res is 1 for SET; 0 otherwise. | |
2405 | * | |
2406 | * In the event of failure, a negative value is returned and *res is | |
2407 | * meaningless. | |
2408 | * | |
2409 | * Callers must make sure to hold nfs_sync_lock to prevent | |
2410 | * ocfs2_delete_inode() on another node from accessing the same | |
2411 | * suballocator concurrently. | |
2412 | */ | |
2413 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) | |
2414 | { | |
2415 | int status; | |
2416 | u16 suballoc_bit = 0, suballoc_slot = 0; | |
2417 | struct inode *inode_alloc_inode; | |
2418 | struct buffer_head *alloc_bh = NULL; | |
2419 | ||
5b09b507 | 2420 | mlog_entry("blkno: %llu", (unsigned long long)blkno); |
6ca497a8 | 2421 | |
2422 | status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, | |
2423 | &suballoc_bit); | |
2424 | if (status < 0) { | |
2425 | mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); | |
2426 | goto bail; | |
2427 | } | |
2428 | ||
2429 | inode_alloc_inode = | |
2430 | ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, | |
2431 | suballoc_slot); | |
2432 | if (!inode_alloc_inode) { | |
2433 | /* the error code could be inaccurate, but we are not able to | |
2434 | * get the correct one. */ | |
2435 | status = -EINVAL; | |
2436 | mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", | |
2437 | (u32)suballoc_slot); | |
2438 | goto bail; | |
2439 | } | |
2440 | ||
2441 | mutex_lock(&inode_alloc_inode->i_mutex); | |
2442 | status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); | |
2443 | if (status < 0) { | |
2444 | mutex_unlock(&inode_alloc_inode->i_mutex); | |
2445 | mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", | |
2446 | (u32)suballoc_slot, status); | |
2447 | goto bail; | |
2448 | } | |
2449 | ||
2450 | status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, | |
2451 | blkno, suballoc_bit, res); | |
2452 | if (status < 0) | |
2453 | mlog(ML_ERROR, "test suballoc bit failed %d\n", status); | |
2454 | ||
2455 | ocfs2_inode_unlock(inode_alloc_inode, 0); | |
2456 | mutex_unlock(&inode_alloc_inode->i_mutex); | |
2457 | ||
2458 | iput(inode_alloc_inode); | |
2459 | brelse(alloc_bh); | |
2460 | bail: | |
2461 | mlog_exit(status); | |
2462 | return status; | |
2463 | } |