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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 | |
7d1fe093 | 56 | struct ocfs2_suballoc_result { |
2b6cb576 JB |
57 | u64 sr_bg_blkno; /* The bg we allocated from. Set |
58 | to 0 when a block group is | |
59 | contiguous. */ | |
ba206635 | 60 | u64 sr_blkno; /* The first allocated block */ |
7d1fe093 JB |
61 | unsigned int sr_bit_offset; /* The bit in the bg */ |
62 | unsigned int sr_bits; /* How many bits we claimed */ | |
63 | }; | |
64 | ||
ccd979bd MF |
65 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); |
66 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); | |
67 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); | |
1fabe148 | 68 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
69 | struct inode *alloc_inode, |
70 | struct buffer_head *bg_bh, | |
71 | u64 group_blkno, | |
798db35f | 72 | unsigned int group_clusters, |
ccd979bd MF |
73 | u16 my_chain, |
74 | struct ocfs2_chain_list *cl); | |
75 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
76 | struct inode *alloc_inode, | |
1187c968 | 77 | struct buffer_head *bh, |
60ca81e8 | 78 | u64 max_block, |
feb473a6 | 79 | u64 *last_alloc_group, |
60ca81e8 | 80 | int flags); |
ccd979bd | 81 | |
ccd979bd MF |
82 | static int ocfs2_cluster_group_search(struct inode *inode, |
83 | struct buffer_head *group_bh, | |
84 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 85 | u64 max_block, |
7d1fe093 | 86 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
87 | static int ocfs2_block_group_search(struct inode *inode, |
88 | struct buffer_head *group_bh, | |
89 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 90 | u64 max_block, |
7d1fe093 | 91 | struct ocfs2_suballoc_result *res); |
aa8f8e93 | 92 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 93 | handle_t *handle, |
ccd979bd MF |
94 | u32 bits_wanted, |
95 | u32 min_bits, | |
7d1fe093 | 96 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
97 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, |
98 | int nr); | |
1fabe148 | 99 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
100 | struct inode *alloc_inode, |
101 | struct ocfs2_group_desc *bg, | |
102 | struct buffer_head *group_bh, | |
103 | unsigned int bit_off, | |
104 | unsigned int num_bits); | |
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; | |
e3b4a97d | 140 | ac->ac_resv = NULL; |
4d0ddb2c TM |
141 | } |
142 | ||
143 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) | |
144 | { | |
145 | ocfs2_free_ac_resource(ac); | |
ccd979bd MF |
146 | kfree(ac); |
147 | } | |
148 | ||
149 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) | |
150 | { | |
151 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); | |
152 | } | |
153 | ||
57e3e797 JB |
154 | #define do_error(fmt, ...) \ |
155 | do{ \ | |
78c37eb0 | 156 | if (resize) \ |
57e3e797 JB |
157 | mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \ |
158 | else \ | |
159 | ocfs2_error(sb, fmt, ##__VA_ARGS__); \ | |
160 | } while (0) | |
161 | ||
970e4936 JB |
162 | static int ocfs2_validate_gd_self(struct super_block *sb, |
163 | struct buffer_head *bh, | |
78c37eb0 | 164 | int resize) |
970e4936 JB |
165 | { |
166 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
167 | ||
7bf72ede | 168 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { |
68f64d47 JB |
169 | do_error("Group descriptor #%llu has bad signature %.*s", |
170 | (unsigned long long)bh->b_blocknr, 7, | |
57e3e797 JB |
171 | gd->bg_signature); |
172 | return -EINVAL; | |
7bf72ede MF |
173 | } |
174 | ||
68f64d47 JB |
175 | if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { |
176 | do_error("Group descriptor #%llu has an invalid bg_blkno " | |
177 | "of %llu", | |
178 | (unsigned long long)bh->b_blocknr, | |
179 | (unsigned long long)le64_to_cpu(gd->bg_blkno)); | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { | |
184 | do_error("Group descriptor #%llu has an invalid " | |
185 | "fs_generation of #%u", | |
186 | (unsigned long long)bh->b_blocknr, | |
187 | le32_to_cpu(gd->bg_generation)); | |
188 | return -EINVAL; | |
189 | } | |
190 | ||
970e4936 JB |
191 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { |
192 | do_error("Group descriptor #%llu has bit count %u but " | |
193 | "claims that %u are free", | |
194 | (unsigned long long)bh->b_blocknr, | |
195 | le16_to_cpu(gd->bg_bits), | |
196 | le16_to_cpu(gd->bg_free_bits_count)); | |
197 | return -EINVAL; | |
198 | } | |
199 | ||
200 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { | |
201 | do_error("Group descriptor #%llu has bit count %u but " | |
202 | "max bitmap bits of %u", | |
203 | (unsigned long long)bh->b_blocknr, | |
204 | le16_to_cpu(gd->bg_bits), | |
205 | 8 * le16_to_cpu(gd->bg_size)); | |
206 | return -EINVAL; | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static int ocfs2_validate_gd_parent(struct super_block *sb, | |
213 | struct ocfs2_dinode *di, | |
214 | struct buffer_head *bh, | |
78c37eb0 | 215 | int resize) |
970e4936 JB |
216 | { |
217 | unsigned int max_bits; | |
218 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
219 | ||
7bf72ede | 220 | if (di->i_blkno != gd->bg_parent_dinode) { |
68f64d47 | 221 | do_error("Group descriptor #%llu has bad parent " |
57e3e797 | 222 | "pointer (%llu, expected %llu)", |
68f64d47 | 223 | (unsigned long long)bh->b_blocknr, |
57e3e797 JB |
224 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), |
225 | (unsigned long long)le64_to_cpu(di->i_blkno)); | |
226 | return -EINVAL; | |
7bf72ede MF |
227 | } |
228 | ||
229 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); | |
230 | if (le16_to_cpu(gd->bg_bits) > max_bits) { | |
68f64d47 JB |
231 | do_error("Group descriptor #%llu has bit count of %u", |
232 | (unsigned long long)bh->b_blocknr, | |
57e3e797 JB |
233 | le16_to_cpu(gd->bg_bits)); |
234 | return -EINVAL; | |
7bf72ede MF |
235 | } |
236 | ||
78c37eb0 TM |
237 | /* In resize, we may meet the case bg_chain == cl_next_free_rec. */ |
238 | if ((le16_to_cpu(gd->bg_chain) > | |
239 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) || | |
240 | ((le16_to_cpu(gd->bg_chain) == | |
241 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) && !resize)) { | |
68f64d47 JB |
242 | do_error("Group descriptor #%llu has bad chain %u", |
243 | (unsigned long long)bh->b_blocknr, | |
57e3e797 JB |
244 | le16_to_cpu(gd->bg_chain)); |
245 | return -EINVAL; | |
7bf72ede MF |
246 | } |
247 | ||
970e4936 JB |
248 | return 0; |
249 | } | |
7bf72ede | 250 | |
57e3e797 | 251 | #undef do_error |
7bf72ede | 252 | |
970e4936 JB |
253 | /* |
254 | * This version only prints errors. It does not fail the filesystem, and | |
255 | * exists only for resize. | |
256 | */ | |
257 | int ocfs2_check_group_descriptor(struct super_block *sb, | |
258 | struct ocfs2_dinode *di, | |
259 | struct buffer_head *bh) | |
260 | { | |
261 | int rc; | |
d6b32bbb JB |
262 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
263 | ||
264 | BUG_ON(!buffer_uptodate(bh)); | |
970e4936 | 265 | |
d6b32bbb JB |
266 | /* |
267 | * If the ecc fails, we return the error but otherwise | |
268 | * leave the filesystem running. We know any error is | |
269 | * local to this block. | |
270 | */ | |
271 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
13723d00 JB |
272 | if (rc) { |
273 | mlog(ML_ERROR, | |
274 | "Checksum failed for group descriptor %llu\n", | |
275 | (unsigned long long)bh->b_blocknr); | |
276 | } else | |
d6b32bbb | 277 | rc = ocfs2_validate_gd_self(sb, bh, 1); |
970e4936 JB |
278 | if (!rc) |
279 | rc = ocfs2_validate_gd_parent(sb, di, bh, 1); | |
280 | ||
281 | return rc; | |
282 | } | |
283 | ||
284 | static int ocfs2_validate_group_descriptor(struct super_block *sb, | |
285 | struct buffer_head *bh) | |
286 | { | |
d6b32bbb JB |
287 | int rc; |
288 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
289 | ||
970e4936 JB |
290 | mlog(0, "Validating group descriptor %llu\n", |
291 | (unsigned long long)bh->b_blocknr); | |
292 | ||
d6b32bbb JB |
293 | BUG_ON(!buffer_uptodate(bh)); |
294 | ||
295 | /* | |
296 | * If the ecc fails, we return the error but otherwise | |
297 | * leave the filesystem running. We know any error is | |
298 | * local to this block. | |
299 | */ | |
300 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
301 | if (rc) | |
302 | return rc; | |
303 | ||
304 | /* | |
305 | * Errors after here are fatal. | |
306 | */ | |
307 | ||
970e4936 | 308 | return ocfs2_validate_gd_self(sb, bh, 0); |
7bf72ede MF |
309 | } |
310 | ||
68f64d47 JB |
311 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, |
312 | u64 gd_blkno, struct buffer_head **bh) | |
313 | { | |
314 | int rc; | |
315 | struct buffer_head *tmp = *bh; | |
316 | ||
8cb471e8 | 317 | rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, |
970e4936 | 318 | ocfs2_validate_group_descriptor); |
68f64d47 JB |
319 | if (rc) |
320 | goto out; | |
321 | ||
970e4936 | 322 | rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); |
68f64d47 JB |
323 | if (rc) { |
324 | brelse(tmp); | |
325 | goto out; | |
326 | } | |
327 | ||
328 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
329 | if (!*bh) | |
330 | *bh = tmp; | |
331 | ||
332 | out: | |
333 | return rc; | |
334 | } | |
335 | ||
798db35f JB |
336 | static void ocfs2_bg_discontig_add_extent(struct ocfs2_super *osb, |
337 | struct ocfs2_group_desc *bg, | |
338 | struct ocfs2_chain_list *cl, | |
339 | u64 p_blkno, u32 clusters) | |
340 | { | |
341 | struct ocfs2_extent_list *el = &bg->bg_list; | |
342 | struct ocfs2_extent_rec *rec; | |
343 | ||
4711954e | 344 | BUG_ON(!ocfs2_supports_discontig_bg(osb)); |
798db35f JB |
345 | if (!el->l_next_free_rec) |
346 | el->l_count = cpu_to_le16(ocfs2_extent_recs_per_gd(osb->sb)); | |
347 | rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec)]; | |
4711954e | 348 | rec->e_blkno = cpu_to_le64(p_blkno); |
798db35f JB |
349 | rec->e_cpos = cpu_to_le32(le16_to_cpu(bg->bg_bits) / |
350 | le16_to_cpu(cl->cl_bpc)); | |
351 | rec->e_leaf_clusters = cpu_to_le32(clusters); | |
352 | le16_add_cpu(&bg->bg_bits, clusters * le16_to_cpu(cl->cl_bpc)); | |
4711954e TM |
353 | le16_add_cpu(&bg->bg_free_bits_count, |
354 | clusters * le16_to_cpu(cl->cl_bpc)); | |
798db35f JB |
355 | le16_add_cpu(&el->l_next_free_rec, 1); |
356 | } | |
357 | ||
1fabe148 | 358 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
359 | struct inode *alloc_inode, |
360 | struct buffer_head *bg_bh, | |
361 | u64 group_blkno, | |
798db35f | 362 | unsigned int group_clusters, |
ccd979bd MF |
363 | u16 my_chain, |
364 | struct ocfs2_chain_list *cl) | |
365 | { | |
366 | int status = 0; | |
798db35f | 367 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); |
ccd979bd MF |
368 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
369 | struct super_block * sb = alloc_inode->i_sb; | |
370 | ||
371 | mlog_entry_void(); | |
372 | ||
373 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { | |
b0697053 MF |
374 | ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " |
375 | "b_blocknr (%llu)", | |
376 | (unsigned long long)group_blkno, | |
ccd979bd MF |
377 | (unsigned long long) bg_bh->b_blocknr); |
378 | status = -EIO; | |
379 | goto bail; | |
380 | } | |
381 | ||
13723d00 | 382 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 383 | INODE_CACHE(alloc_inode), |
13723d00 JB |
384 | bg_bh, |
385 | OCFS2_JOURNAL_ACCESS_CREATE); | |
ccd979bd MF |
386 | if (status < 0) { |
387 | mlog_errno(status); | |
388 | goto bail; | |
389 | } | |
390 | ||
391 | memset(bg, 0, sb->s_blocksize); | |
392 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); | |
393 | bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); | |
8571882c TM |
394 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, |
395 | osb->s_feature_incompat)); | |
ccd979bd MF |
396 | bg->bg_chain = cpu_to_le16(my_chain); |
397 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; | |
398 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); | |
399 | bg->bg_blkno = cpu_to_le64(group_blkno); | |
798db35f JB |
400 | if (group_clusters == le16_to_cpu(cl->cl_cpg)) |
401 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); | |
402 | else | |
4711954e | 403 | ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, |
798db35f JB |
404 | group_clusters); |
405 | ||
ccd979bd MF |
406 | /* set the 1st bit in the bitmap to account for the descriptor block */ |
407 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); | |
408 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); | |
409 | ||
ec20cec7 | 410 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd MF |
411 | |
412 | /* There is no need to zero out or otherwise initialize the | |
413 | * other blocks in a group - All valid FS metadata in a block | |
414 | * group stores the superblock fs_generation value at | |
415 | * allocation time. */ | |
416 | ||
417 | bail: | |
418 | mlog_exit(status); | |
419 | return status; | |
420 | } | |
421 | ||
422 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) | |
423 | { | |
424 | u16 curr, best; | |
425 | ||
426 | best = curr = 0; | |
427 | while (curr < le16_to_cpu(cl->cl_count)) { | |
428 | if (le32_to_cpu(cl->cl_recs[best].c_total) > | |
429 | le32_to_cpu(cl->cl_recs[curr].c_total)) | |
430 | best = curr; | |
431 | curr++; | |
432 | } | |
433 | return best; | |
434 | } | |
435 | ||
798db35f JB |
436 | static struct buffer_head * |
437 | ocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, | |
438 | struct inode *alloc_inode, | |
439 | struct ocfs2_alloc_context *ac, | |
440 | struct ocfs2_chain_list *cl) | |
441 | { | |
442 | int status; | |
443 | u32 bit_off, num_bits; | |
444 | u64 bg_blkno; | |
445 | struct buffer_head *bg_bh; | |
446 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
447 | ||
1ed9b777 | 448 | status = ocfs2_claim_clusters(handle, ac, |
798db35f JB |
449 | le16_to_cpu(cl->cl_cpg), &bit_off, |
450 | &num_bits); | |
451 | if (status < 0) { | |
452 | if (status != -ENOSPC) | |
453 | mlog_errno(status); | |
454 | goto bail; | |
455 | } | |
456 | ||
457 | /* setup the group */ | |
458 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
459 | mlog(0, "new descriptor, record %u, at block %llu\n", | |
460 | alloc_rec, (unsigned long long)bg_blkno); | |
461 | ||
462 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
463 | if (!bg_bh) { | |
464 | status = -EIO; | |
465 | mlog_errno(status); | |
466 | goto bail; | |
467 | } | |
468 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
469 | ||
470 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
471 | bg_blkno, num_bits, alloc_rec, cl); | |
472 | if (status < 0) { | |
473 | brelse(bg_bh); | |
474 | mlog_errno(status); | |
475 | } | |
476 | ||
477 | bail: | |
478 | return status ? ERR_PTR(status) : bg_bh; | |
479 | } | |
480 | ||
481 | static int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, | |
482 | handle_t *handle, | |
483 | struct ocfs2_alloc_context *ac, | |
484 | unsigned int min_bits, | |
485 | u32 *bit_off, u32 *num_bits) | |
486 | { | |
18d3a98f | 487 | int status = 0; |
798db35f JB |
488 | |
489 | while (min_bits) { | |
1ed9b777 | 490 | status = ocfs2_claim_clusters(handle, ac, min_bits, |
798db35f JB |
491 | bit_off, num_bits); |
492 | if (status != -ENOSPC) | |
493 | break; | |
494 | ||
495 | min_bits >>= 1; | |
496 | } | |
497 | ||
498 | return status; | |
499 | } | |
500 | ||
501 | static int ocfs2_block_group_grow_discontig(handle_t *handle, | |
502 | struct inode *alloc_inode, | |
503 | struct buffer_head *bg_bh, | |
504 | struct ocfs2_alloc_context *ac, | |
505 | struct ocfs2_chain_list *cl, | |
506 | unsigned int min_bits) | |
507 | { | |
508 | int status; | |
509 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
510 | struct ocfs2_group_desc *bg = | |
511 | (struct ocfs2_group_desc *)bg_bh->b_data; | |
4711954e TM |
512 | unsigned int needed = le16_to_cpu(cl->cl_cpg) - |
513 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
514 | u32 p_cpos, clusters; |
515 | u64 p_blkno; | |
516 | struct ocfs2_extent_list *el = &bg->bg_list; | |
517 | ||
518 | status = ocfs2_journal_access_gd(handle, | |
519 | INODE_CACHE(alloc_inode), | |
520 | bg_bh, | |
521 | OCFS2_JOURNAL_ACCESS_CREATE); | |
522 | if (status < 0) { | |
523 | mlog_errno(status); | |
524 | goto bail; | |
525 | } | |
526 | ||
527 | while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < | |
528 | le16_to_cpu(el->l_count))) { | |
798db35f JB |
529 | if (min_bits > needed) |
530 | min_bits = needed; | |
531 | status = ocfs2_block_group_claim_bits(osb, handle, ac, | |
532 | min_bits, &p_cpos, | |
533 | &clusters); | |
534 | if (status < 0) { | |
535 | if (status != -ENOSPC) | |
536 | mlog_errno(status); | |
537 | goto bail; | |
538 | } | |
539 | p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); | |
540 | ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, | |
541 | clusters); | |
542 | ||
543 | min_bits = clusters; | |
4711954e TM |
544 | needed = le16_to_cpu(cl->cl_cpg) - |
545 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
546 | } |
547 | ||
548 | if (needed > 0) { | |
4711954e TM |
549 | /* |
550 | * We have used up all the extent rec but can't fill up | |
551 | * the cpg. So bail out. | |
552 | */ | |
553 | status = -ENOSPC; | |
554 | goto bail; | |
798db35f JB |
555 | } |
556 | ||
557 | ocfs2_journal_dirty(handle, bg_bh); | |
558 | ||
559 | bail: | |
560 | return status; | |
561 | } | |
562 | ||
8b06bc59 JB |
563 | static void ocfs2_bg_alloc_cleanup(handle_t *handle, |
564 | struct ocfs2_alloc_context *cluster_ac, | |
565 | struct inode *alloc_inode, | |
566 | struct buffer_head *bg_bh) | |
798db35f | 567 | { |
8b06bc59 | 568 | int i, ret; |
798db35f JB |
569 | struct ocfs2_group_desc *bg; |
570 | struct ocfs2_extent_list *el; | |
571 | struct ocfs2_extent_rec *rec; | |
572 | ||
573 | if (!bg_bh) | |
574 | return; | |
575 | ||
576 | bg = (struct ocfs2_group_desc *)bg_bh->b_data; | |
577 | el = &bg->bg_list; | |
578 | for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { | |
579 | rec = &el->l_recs[i]; | |
8b06bc59 JB |
580 | ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, |
581 | cluster_ac->ac_bh, | |
582 | le64_to_cpu(rec->e_blkno), | |
583 | le32_to_cpu(rec->e_leaf_clusters)); | |
584 | if (ret) | |
585 | mlog_errno(ret); | |
586 | /* Try all the clusters to free */ | |
798db35f JB |
587 | } |
588 | ||
589 | ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); | |
590 | brelse(bg_bh); | |
591 | } | |
592 | ||
593 | static struct buffer_head * | |
594 | ocfs2_block_group_alloc_discontig(handle_t *handle, | |
595 | struct inode *alloc_inode, | |
596 | struct ocfs2_alloc_context *ac, | |
8b06bc59 | 597 | struct ocfs2_chain_list *cl) |
798db35f JB |
598 | { |
599 | int status; | |
600 | u32 bit_off, num_bits; | |
601 | u64 bg_blkno; | |
602 | unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; | |
603 | struct buffer_head *bg_bh = NULL; | |
604 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
605 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
606 | ||
4711954e | 607 | if (!ocfs2_supports_discontig_bg(osb)) { |
798db35f JB |
608 | status = -ENOSPC; |
609 | goto bail; | |
610 | } | |
611 | ||
8b06bc59 JB |
612 | status = ocfs2_extend_trans(handle, |
613 | ocfs2_calc_bg_discontig_credits(osb->sb)); | |
614 | if (status) { | |
615 | mlog_errno(status); | |
616 | goto bail; | |
617 | } | |
618 | ||
95ec0adf JB |
619 | /* |
620 | * We're going to be grabbing from multiple cluster groups. | |
621 | * We don't have enough credits to relink them all, and the | |
622 | * cluster groups will be staying in cache for the duration of | |
623 | * this operation. | |
624 | */ | |
625 | ac->ac_allow_chain_relink = 0; | |
626 | ||
798db35f JB |
627 | /* Claim the first region */ |
628 | status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, | |
629 | &bit_off, &num_bits); | |
630 | if (status < 0) { | |
631 | if (status != -ENOSPC) | |
632 | mlog_errno(status); | |
633 | goto bail; | |
634 | } | |
635 | min_bits = num_bits; | |
636 | ||
637 | /* setup the group */ | |
638 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
639 | mlog(0, "new descriptor, record %u, at block %llu\n", | |
640 | alloc_rec, (unsigned long long)bg_blkno); | |
641 | ||
642 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
643 | if (!bg_bh) { | |
644 | status = -EIO; | |
645 | mlog_errno(status); | |
646 | goto bail; | |
647 | } | |
648 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
649 | ||
650 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
651 | bg_blkno, num_bits, alloc_rec, cl); | |
652 | if (status < 0) { | |
653 | mlog_errno(status); | |
654 | goto bail; | |
655 | } | |
656 | ||
657 | status = ocfs2_block_group_grow_discontig(handle, alloc_inode, | |
658 | bg_bh, ac, cl, min_bits); | |
659 | if (status) | |
660 | mlog_errno(status); | |
661 | ||
662 | bail: | |
663 | if (status) | |
8b06bc59 | 664 | ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); |
798db35f JB |
665 | return status ? ERR_PTR(status) : bg_bh; |
666 | } | |
667 | ||
ccd979bd MF |
668 | /* |
669 | * We expect the block group allocator to already be locked. | |
670 | */ | |
671 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
672 | struct inode *alloc_inode, | |
1187c968 | 673 | struct buffer_head *bh, |
60ca81e8 | 674 | u64 max_block, |
feb473a6 | 675 | u64 *last_alloc_group, |
60ca81e8 | 676 | int flags) |
ccd979bd MF |
677 | { |
678 | int status, credits; | |
679 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; | |
680 | struct ocfs2_chain_list *cl; | |
681 | struct ocfs2_alloc_context *ac = NULL; | |
1fabe148 | 682 | handle_t *handle = NULL; |
4711954e | 683 | u16 alloc_rec; |
ccd979bd MF |
684 | struct buffer_head *bg_bh = NULL; |
685 | struct ocfs2_group_desc *bg; | |
686 | ||
687 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); | |
688 | ||
689 | mlog_entry_void(); | |
690 | ||
ccd979bd | 691 | cl = &fe->id2.i_chain; |
1187c968 JB |
692 | status = ocfs2_reserve_clusters_with_limit(osb, |
693 | le16_to_cpu(cl->cl_cpg), | |
60ca81e8 | 694 | max_block, flags, &ac); |
ccd979bd MF |
695 | if (status < 0) { |
696 | if (status != -ENOSPC) | |
697 | mlog_errno(status); | |
698 | goto bail; | |
699 | } | |
700 | ||
701 | credits = ocfs2_calc_group_alloc_credits(osb->sb, | |
702 | le16_to_cpu(cl->cl_cpg)); | |
65eff9cc | 703 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
704 | if (IS_ERR(handle)) { |
705 | status = PTR_ERR(handle); | |
706 | handle = NULL; | |
707 | mlog_errno(status); | |
708 | goto bail; | |
709 | } | |
710 | ||
feb473a6 TM |
711 | if (last_alloc_group && *last_alloc_group != 0) { |
712 | mlog(0, "use old allocation group %llu for block group alloc\n", | |
713 | (unsigned long long)*last_alloc_group); | |
714 | ac->ac_last_group = *last_alloc_group; | |
715 | } | |
798db35f JB |
716 | |
717 | bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, | |
718 | ac, cl); | |
719 | if (IS_ERR(bg_bh) && (PTR_ERR(bg_bh) == -ENOSPC)) | |
720 | bg_bh = ocfs2_block_group_alloc_discontig(handle, | |
721 | alloc_inode, | |
8b06bc59 | 722 | ac, cl); |
798db35f JB |
723 | if (IS_ERR(bg_bh)) { |
724 | status = PTR_ERR(bg_bh); | |
725 | bg_bh = NULL; | |
ccd979bd MF |
726 | if (status != -ENOSPC) |
727 | mlog_errno(status); | |
728 | goto bail; | |
729 | } | |
ccd979bd MF |
730 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
731 | ||
0cf2f763 | 732 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
13723d00 | 733 | bh, OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
734 | if (status < 0) { |
735 | mlog_errno(status); | |
736 | goto bail; | |
737 | } | |
738 | ||
4711954e TM |
739 | alloc_rec = le16_to_cpu(bg->bg_chain); |
740 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, | |
ccd979bd | 741 | le16_to_cpu(bg->bg_free_bits_count)); |
4711954e | 742 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, |
798db35f | 743 | le16_to_cpu(bg->bg_bits)); |
0a463b74 | 744 | cl->cl_recs[alloc_rec].c_blkno = bg->bg_blkno; |
ccd979bd MF |
745 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) |
746 | le16_add_cpu(&cl->cl_next_free_rec, 1); | |
747 | ||
748 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - | |
749 | le16_to_cpu(bg->bg_free_bits_count)); | |
750 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); | |
751 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); | |
752 | ||
ec20cec7 | 753 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
754 | |
755 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); | |
756 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
757 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, | |
758 | le32_to_cpu(fe->i_clusters))); | |
759 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); | |
760 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); | |
8110b073 | 761 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
ccd979bd MF |
762 | |
763 | status = 0; | |
feb473a6 TM |
764 | |
765 | /* save the new last alloc group so that the caller can cache it. */ | |
766 | if (last_alloc_group) | |
767 | *last_alloc_group = ac->ac_last_group; | |
768 | ||
ccd979bd MF |
769 | bail: |
770 | if (handle) | |
02dc1af4 | 771 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
772 | |
773 | if (ac) | |
774 | ocfs2_free_alloc_context(ac); | |
775 | ||
a81cb88b | 776 | brelse(bg_bh); |
ccd979bd MF |
777 | |
778 | mlog_exit(status); | |
779 | return status; | |
780 | } | |
781 | ||
782 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, | |
da5cbf2f MF |
783 | struct ocfs2_alloc_context *ac, |
784 | int type, | |
ffda89a3 | 785 | u32 slot, |
feb473a6 | 786 | u64 *last_alloc_group, |
60ca81e8 | 787 | int flags) |
ccd979bd MF |
788 | { |
789 | int status; | |
790 | u32 bits_wanted = ac->ac_bits_wanted; | |
da5cbf2f | 791 | struct inode *alloc_inode; |
ccd979bd | 792 | struct buffer_head *bh = NULL; |
ccd979bd MF |
793 | struct ocfs2_dinode *fe; |
794 | u32 free_bits; | |
795 | ||
796 | mlog_entry_void(); | |
797 | ||
da5cbf2f MF |
798 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
799 | if (!alloc_inode) { | |
800 | mlog_errno(-EINVAL); | |
801 | return -EINVAL; | |
802 | } | |
ccd979bd | 803 | |
da5cbf2f MF |
804 | mutex_lock(&alloc_inode->i_mutex); |
805 | ||
e63aecb6 | 806 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
ccd979bd | 807 | if (status < 0) { |
da5cbf2f MF |
808 | mutex_unlock(&alloc_inode->i_mutex); |
809 | iput(alloc_inode); | |
810 | ||
ccd979bd | 811 | mlog_errno(status); |
da5cbf2f | 812 | return status; |
ccd979bd MF |
813 | } |
814 | ||
da5cbf2f | 815 | ac->ac_inode = alloc_inode; |
a4a48911 | 816 | ac->ac_alloc_slot = slot; |
da5cbf2f | 817 | |
ccd979bd | 818 | fe = (struct ocfs2_dinode *) bh->b_data; |
10995aa2 JB |
819 | |
820 | /* The bh was validated by the inode read inside | |
821 | * ocfs2_inode_lock(). Any corruption is a code bug. */ | |
822 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
823 | ||
ccd979bd | 824 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { |
b0697053 MF |
825 | ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", |
826 | (unsigned long long)le64_to_cpu(fe->i_blkno)); | |
ccd979bd MF |
827 | status = -EIO; |
828 | goto bail; | |
829 | } | |
830 | ||
831 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - | |
832 | le32_to_cpu(fe->id1.bitmap1.i_used); | |
833 | ||
834 | if (bits_wanted > free_bits) { | |
835 | /* cluster bitmap never grows */ | |
836 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { | |
837 | mlog(0, "Disk Full: wanted=%u, free_bits=%u\n", | |
838 | bits_wanted, free_bits); | |
839 | status = -ENOSPC; | |
840 | goto bail; | |
841 | } | |
842 | ||
60ca81e8 | 843 | if (!(flags & ALLOC_NEW_GROUP)) { |
ffda89a3 TM |
844 | mlog(0, "Alloc File %u Full: wanted=%u, free_bits=%u, " |
845 | "and we don't alloc a new group for it.\n", | |
846 | slot, bits_wanted, free_bits); | |
847 | status = -ENOSPC; | |
848 | goto bail; | |
849 | } | |
850 | ||
1187c968 | 851 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh, |
feb473a6 TM |
852 | ac->ac_max_block, |
853 | last_alloc_group, flags); | |
ccd979bd MF |
854 | if (status < 0) { |
855 | if (status != -ENOSPC) | |
856 | mlog_errno(status); | |
857 | goto bail; | |
858 | } | |
859 | atomic_inc(&osb->alloc_stats.bg_extends); | |
860 | ||
861 | /* You should never ask for this much metadata */ | |
862 | BUG_ON(bits_wanted > | |
863 | (le32_to_cpu(fe->id1.bitmap1.i_total) | |
864 | - le32_to_cpu(fe->id1.bitmap1.i_used))); | |
865 | } | |
866 | ||
867 | get_bh(bh); | |
868 | ac->ac_bh = bh; | |
869 | bail: | |
a81cb88b | 870 | brelse(bh); |
ccd979bd MF |
871 | |
872 | mlog_exit(status); | |
873 | return status; | |
874 | } | |
875 | ||
b89c5428 TY |
876 | static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
877 | { | |
878 | spin_lock(&osb->osb_lock); | |
879 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
880 | spin_unlock(&osb->osb_lock); | |
881 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
882 | } | |
883 | ||
884 | static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) | |
885 | { | |
886 | spin_lock(&osb->osb_lock); | |
887 | osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; | |
888 | spin_unlock(&osb->osb_lock); | |
889 | atomic_set(&osb->s_num_meta_stolen, 0); | |
890 | } | |
891 | ||
892 | void ocfs2_init_steal_slots(struct ocfs2_super *osb) | |
893 | { | |
894 | ocfs2_init_inode_steal_slot(osb); | |
895 | ocfs2_init_meta_steal_slot(osb); | |
896 | } | |
897 | ||
898 | static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) | |
899 | { | |
900 | spin_lock(&osb->osb_lock); | |
901 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
902 | osb->s_inode_steal_slot = slot; | |
903 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
904 | osb->s_meta_steal_slot = slot; | |
905 | spin_unlock(&osb->osb_lock); | |
906 | } | |
907 | ||
908 | static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) | |
909 | { | |
910 | int slot = OCFS2_INVALID_SLOT; | |
911 | ||
912 | spin_lock(&osb->osb_lock); | |
913 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
914 | slot = osb->s_inode_steal_slot; | |
915 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
916 | slot = osb->s_meta_steal_slot; | |
917 | spin_unlock(&osb->osb_lock); | |
918 | ||
919 | return slot; | |
920 | } | |
921 | ||
922 | static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
923 | { | |
924 | return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); | |
925 | } | |
926 | ||
927 | static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) | |
928 | { | |
929 | return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); | |
930 | } | |
931 | ||
932 | static int ocfs2_steal_resource(struct ocfs2_super *osb, | |
933 | struct ocfs2_alloc_context *ac, | |
934 | int type) | |
935 | { | |
936 | int i, status = -ENOSPC; | |
937 | int slot = __ocfs2_get_steal_slot(osb, type); | |
938 | ||
939 | /* Start to steal resource from the first slot after ours. */ | |
940 | if (slot == OCFS2_INVALID_SLOT) | |
941 | slot = osb->slot_num + 1; | |
942 | ||
943 | for (i = 0; i < osb->max_slots; i++, slot++) { | |
944 | if (slot == osb->max_slots) | |
945 | slot = 0; | |
946 | ||
947 | if (slot == osb->slot_num) | |
948 | continue; | |
949 | ||
950 | status = ocfs2_reserve_suballoc_bits(osb, ac, | |
951 | type, | |
952 | (u32)slot, NULL, | |
953 | NOT_ALLOC_NEW_GROUP); | |
954 | if (status >= 0) { | |
955 | __ocfs2_set_steal_slot(osb, slot, type); | |
956 | break; | |
957 | } | |
958 | ||
959 | ocfs2_free_ac_resource(ac); | |
960 | } | |
961 | ||
962 | return status; | |
963 | } | |
964 | ||
965 | static int ocfs2_steal_inode(struct ocfs2_super *osb, | |
966 | struct ocfs2_alloc_context *ac) | |
967 | { | |
968 | return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); | |
969 | } | |
970 | ||
971 | static int ocfs2_steal_meta(struct ocfs2_super *osb, | |
972 | struct ocfs2_alloc_context *ac) | |
973 | { | |
974 | return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); | |
975 | } | |
976 | ||
cf1d6c76 TY |
977 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
978 | int blocks, | |
979 | struct ocfs2_alloc_context **ac) | |
ccd979bd MF |
980 | { |
981 | int status; | |
b89c5428 | 982 | int slot = ocfs2_get_meta_steal_slot(osb); |
ccd979bd | 983 | |
cd861280 | 984 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
985 | if (!(*ac)) { |
986 | status = -ENOMEM; | |
987 | mlog_errno(status); | |
988 | goto bail; | |
989 | } | |
990 | ||
cf1d6c76 | 991 | (*ac)->ac_bits_wanted = blocks; |
ccd979bd | 992 | (*ac)->ac_which = OCFS2_AC_USE_META; |
ccd979bd MF |
993 | (*ac)->ac_group_search = ocfs2_block_group_search; |
994 | ||
b89c5428 TY |
995 | if (slot != OCFS2_INVALID_SLOT && |
996 | atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) | |
997 | goto extent_steal; | |
998 | ||
999 | atomic_set(&osb->s_num_meta_stolen, 0); | |
da5cbf2f | 1000 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
ffda89a3 | 1001 | EXTENT_ALLOC_SYSTEM_INODE, |
b89c5428 | 1002 | (u32)osb->slot_num, NULL, |
33d5d380 | 1003 | ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); |
b89c5428 TY |
1004 | |
1005 | ||
1006 | if (status >= 0) { | |
1007 | status = 0; | |
1008 | if (slot != OCFS2_INVALID_SLOT) | |
1009 | ocfs2_init_meta_steal_slot(osb); | |
1010 | goto bail; | |
1011 | } else if (status < 0 && status != -ENOSPC) { | |
1012 | mlog_errno(status); | |
1013 | goto bail; | |
1014 | } | |
1015 | ||
1016 | ocfs2_free_ac_resource(*ac); | |
1017 | ||
1018 | extent_steal: | |
1019 | status = ocfs2_steal_meta(osb, *ac); | |
1020 | atomic_inc(&osb->s_num_meta_stolen); | |
ccd979bd MF |
1021 | if (status < 0) { |
1022 | if (status != -ENOSPC) | |
1023 | mlog_errno(status); | |
1024 | goto bail; | |
1025 | } | |
1026 | ||
1027 | status = 0; | |
1028 | bail: | |
1029 | if ((status < 0) && *ac) { | |
1030 | ocfs2_free_alloc_context(*ac); | |
1031 | *ac = NULL; | |
1032 | } | |
1033 | ||
ccd979bd MF |
1034 | mlog_exit(status); |
1035 | return status; | |
1036 | } | |
1037 | ||
cf1d6c76 TY |
1038 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
1039 | struct ocfs2_extent_list *root_el, | |
1040 | struct ocfs2_alloc_context **ac) | |
1041 | { | |
1042 | return ocfs2_reserve_new_metadata_blocks(osb, | |
1043 | ocfs2_extend_meta_needed(root_el), | |
1044 | ac); | |
1045 | } | |
1046 | ||
ccd979bd | 1047 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
ccd979bd MF |
1048 | struct ocfs2_alloc_context **ac) |
1049 | { | |
1050 | int status; | |
b89c5428 | 1051 | int slot = ocfs2_get_inode_steal_slot(osb); |
feb473a6 | 1052 | u64 alloc_group; |
ccd979bd | 1053 | |
cd861280 | 1054 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1055 | if (!(*ac)) { |
1056 | status = -ENOMEM; | |
1057 | mlog_errno(status); | |
1058 | goto bail; | |
1059 | } | |
1060 | ||
1061 | (*ac)->ac_bits_wanted = 1; | |
ccd979bd MF |
1062 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
1063 | ||
ccd979bd MF |
1064 | (*ac)->ac_group_search = ocfs2_block_group_search; |
1065 | ||
1187c968 JB |
1066 | /* |
1067 | * stat(2) can't handle i_ino > 32bits, so we tell the | |
1068 | * lower levels not to allocate us a block group past that | |
12462f1d | 1069 | * limit. The 'inode64' mount option avoids this behavior. |
1187c968 | 1070 | */ |
12462f1d JB |
1071 | if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) |
1072 | (*ac)->ac_max_block = (u32)~0U; | |
1187c968 | 1073 | |
4d0ddb2c TM |
1074 | /* |
1075 | * slot is set when we successfully steal inode from other nodes. | |
1076 | * It is reset in 3 places: | |
1077 | * 1. when we flush the truncate log | |
1078 | * 2. when we complete local alloc recovery. | |
1079 | * 3. when we successfully allocate from our own slot. | |
1080 | * After it is set, we will go on stealing inodes until we find the | |
1081 | * need to check our slots to see whether there is some space for us. | |
1082 | */ | |
1083 | if (slot != OCFS2_INVALID_SLOT && | |
b89c5428 | 1084 | atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) |
4d0ddb2c TM |
1085 | goto inode_steal; |
1086 | ||
1087 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
feb473a6 | 1088 | alloc_group = osb->osb_inode_alloc_group; |
da5cbf2f MF |
1089 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
1090 | INODE_ALLOC_SYSTEM_INODE, | |
b89c5428 | 1091 | (u32)osb->slot_num, |
feb473a6 | 1092 | &alloc_group, |
60ca81e8 TM |
1093 | ALLOC_NEW_GROUP | |
1094 | ALLOC_GROUPS_FROM_GLOBAL); | |
4d0ddb2c TM |
1095 | if (status >= 0) { |
1096 | status = 0; | |
1097 | ||
feb473a6 TM |
1098 | spin_lock(&osb->osb_lock); |
1099 | osb->osb_inode_alloc_group = alloc_group; | |
1100 | spin_unlock(&osb->osb_lock); | |
1101 | mlog(0, "after reservation, new allocation group is " | |
1102 | "%llu\n", (unsigned long long)alloc_group); | |
1103 | ||
4d0ddb2c TM |
1104 | /* |
1105 | * Some inodes must be freed by us, so try to allocate | |
1106 | * from our own next time. | |
1107 | */ | |
1108 | if (slot != OCFS2_INVALID_SLOT) | |
1109 | ocfs2_init_inode_steal_slot(osb); | |
1110 | goto bail; | |
1111 | } else if (status < 0 && status != -ENOSPC) { | |
1112 | mlog_errno(status); | |
1113 | goto bail; | |
1114 | } | |
1115 | ||
1116 | ocfs2_free_ac_resource(*ac); | |
1117 | ||
1118 | inode_steal: | |
b89c5428 | 1119 | status = ocfs2_steal_inode(osb, *ac); |
4d0ddb2c | 1120 | atomic_inc(&osb->s_num_inodes_stolen); |
ccd979bd MF |
1121 | if (status < 0) { |
1122 | if (status != -ENOSPC) | |
1123 | mlog_errno(status); | |
1124 | goto bail; | |
1125 | } | |
1126 | ||
1127 | status = 0; | |
1128 | bail: | |
1129 | if ((status < 0) && *ac) { | |
1130 | ocfs2_free_alloc_context(*ac); | |
1131 | *ac = NULL; | |
1132 | } | |
1133 | ||
ccd979bd MF |
1134 | mlog_exit(status); |
1135 | return status; | |
1136 | } | |
1137 | ||
1138 | /* local alloc code has to do the same thing, so rather than do this | |
1139 | * twice.. */ | |
1140 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
1141 | struct ocfs2_alloc_context *ac) | |
1142 | { | |
1143 | int status; | |
1144 | ||
ccd979bd MF |
1145 | ac->ac_which = OCFS2_AC_USE_MAIN; |
1146 | ac->ac_group_search = ocfs2_cluster_group_search; | |
1147 | ||
da5cbf2f MF |
1148 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
1149 | GLOBAL_BITMAP_SYSTEM_INODE, | |
feb473a6 | 1150 | OCFS2_INVALID_SLOT, NULL, |
ffda89a3 | 1151 | ALLOC_NEW_GROUP); |
da5cbf2f | 1152 | if (status < 0 && status != -ENOSPC) { |
ccd979bd | 1153 | mlog_errno(status); |
da5cbf2f MF |
1154 | goto bail; |
1155 | } | |
1156 | ||
ccd979bd MF |
1157 | bail: |
1158 | return status; | |
1159 | } | |
1160 | ||
1161 | /* Callers don't need to care which bitmap (local alloc or main) to | |
1162 | * use so we figure it out for them, but unfortunately this clutters | |
1163 | * things a bit. */ | |
1187c968 JB |
1164 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
1165 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 1166 | int flags, |
1187c968 | 1167 | struct ocfs2_alloc_context **ac) |
ccd979bd MF |
1168 | { |
1169 | int status; | |
1170 | ||
1171 | mlog_entry_void(); | |
1172 | ||
cd861280 | 1173 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1174 | if (!(*ac)) { |
1175 | status = -ENOMEM; | |
1176 | mlog_errno(status); | |
1177 | goto bail; | |
1178 | } | |
1179 | ||
1180 | (*ac)->ac_bits_wanted = bits_wanted; | |
1187c968 | 1181 | (*ac)->ac_max_block = max_block; |
ccd979bd MF |
1182 | |
1183 | status = -ENOSPC; | |
60ca81e8 TM |
1184 | if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && |
1185 | ocfs2_alloc_should_use_local(osb, bits_wanted)) { | |
ccd979bd | 1186 | status = ocfs2_reserve_local_alloc_bits(osb, |
ccd979bd MF |
1187 | bits_wanted, |
1188 | *ac); | |
a57c8fd2 | 1189 | if ((status < 0) && (status != -ENOSPC)) { |
ccd979bd MF |
1190 | mlog_errno(status); |
1191 | goto bail; | |
ccd979bd MF |
1192 | } |
1193 | } | |
1194 | ||
1195 | if (status == -ENOSPC) { | |
1196 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); | |
1197 | if (status < 0) { | |
1198 | if (status != -ENOSPC) | |
1199 | mlog_errno(status); | |
1200 | goto bail; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | status = 0; | |
1205 | bail: | |
1206 | if ((status < 0) && *ac) { | |
1207 | ocfs2_free_alloc_context(*ac); | |
1208 | *ac = NULL; | |
1209 | } | |
1210 | ||
1211 | mlog_exit(status); | |
1212 | return status; | |
1213 | } | |
1214 | ||
1187c968 JB |
1215 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, |
1216 | u32 bits_wanted, | |
1217 | struct ocfs2_alloc_context **ac) | |
1218 | { | |
60ca81e8 TM |
1219 | return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, |
1220 | ALLOC_NEW_GROUP, ac); | |
1187c968 JB |
1221 | } |
1222 | ||
ccd979bd MF |
1223 | /* |
1224 | * More or less lifted from ext3. I'll leave their description below: | |
1225 | * | |
1226 | * "For ext3 allocations, we must not reuse any blocks which are | |
1227 | * allocated in the bitmap buffer's "last committed data" copy. This | |
1228 | * prevents deletes from freeing up the page for reuse until we have | |
1229 | * committed the delete transaction. | |
1230 | * | |
1231 | * If we didn't do this, then deleting something and reallocating it as | |
1232 | * data would allow the old block to be overwritten before the | |
1233 | * transaction committed (because we force data to disk before commit). | |
1234 | * This would lead to corruption if we crashed between overwriting the | |
1235 | * data and committing the delete. | |
1236 | * | |
1237 | * @@@ We may want to make this allocation behaviour conditional on | |
1238 | * data-writes at some point, and disable it for metadata allocations or | |
1239 | * sync-data inodes." | |
1240 | * | |
1241 | * Note: OCFS2 already does this differently for metadata vs data | |
c78bad11 | 1242 | * allocations, as those bitmaps are separate and undo access is never |
ccd979bd MF |
1243 | * called on a metadata group descriptor. |
1244 | */ | |
1245 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
1246 | int nr) | |
1247 | { | |
1248 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
94e41ecf | 1249 | int ret; |
ccd979bd MF |
1250 | |
1251 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) | |
1252 | return 0; | |
94e41ecf SM |
1253 | |
1254 | if (!buffer_jbd(bg_bh)) | |
ccd979bd MF |
1255 | return 1; |
1256 | ||
94e41ecf | 1257 | jbd_lock_bh_state(bg_bh); |
ccd979bd | 1258 | bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; |
94e41ecf SM |
1259 | if (bg) |
1260 | ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); | |
1261 | else | |
1262 | ret = 1; | |
1263 | jbd_unlock_bh_state(bg_bh); | |
1264 | ||
1265 | return ret; | |
ccd979bd MF |
1266 | } |
1267 | ||
1268 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, | |
1269 | struct buffer_head *bg_bh, | |
1270 | unsigned int bits_wanted, | |
7bf72ede | 1271 | unsigned int total_bits, |
7d1fe093 | 1272 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1273 | { |
1274 | void *bitmap; | |
1275 | u16 best_offset, best_size; | |
1276 | int offset, start, found, status = 0; | |
1277 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1278 | ||
42035306 JB |
1279 | /* Callers got this descriptor from |
1280 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1281 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1282 | |
1283 | found = start = best_offset = best_size = 0; | |
1284 | bitmap = bg->bg_bitmap; | |
1285 | ||
7bf72ede MF |
1286 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
1287 | if (offset == total_bits) | |
ccd979bd MF |
1288 | break; |
1289 | ||
1290 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { | |
1291 | /* We found a zero, but we can't use it as it | |
1292 | * hasn't been put to disk yet! */ | |
1293 | found = 0; | |
1294 | start = offset + 1; | |
1295 | } else if (offset == start) { | |
1296 | /* we found a zero */ | |
1297 | found++; | |
1298 | /* move start to the next bit to test */ | |
1299 | start++; | |
1300 | } else { | |
1301 | /* got a zero after some ones */ | |
1302 | found = 1; | |
1303 | start = offset + 1; | |
1304 | } | |
1305 | if (found > best_size) { | |
1306 | best_size = found; | |
1307 | best_offset = start - found; | |
1308 | } | |
1309 | /* we got everything we needed */ | |
1310 | if (found == bits_wanted) { | |
1311 | /* mlog(0, "Found it all!\n"); */ | |
1312 | break; | |
1313 | } | |
1314 | } | |
1315 | ||
7d1fe093 JB |
1316 | if (best_size) { |
1317 | res->sr_bit_offset = best_offset; | |
1318 | res->sr_bits = best_size; | |
ccd979bd MF |
1319 | } else { |
1320 | status = -ENOSPC; | |
1321 | /* No error log here -- see the comment above | |
1322 | * ocfs2_test_bg_bit_allocatable */ | |
1323 | } | |
1324 | ||
1325 | return status; | |
1326 | } | |
1327 | ||
1fabe148 | 1328 | static inline int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
1329 | struct inode *alloc_inode, |
1330 | struct ocfs2_group_desc *bg, | |
1331 | struct buffer_head *group_bh, | |
1332 | unsigned int bit_off, | |
1333 | unsigned int num_bits) | |
1334 | { | |
1335 | int status; | |
1336 | void *bitmap = bg->bg_bitmap; | |
1337 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1338 | ||
1339 | mlog_entry_void(); | |
1340 | ||
42035306 JB |
1341 | /* All callers get the descriptor via |
1342 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1343 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1344 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); |
1345 | ||
1346 | mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off, | |
1347 | num_bits); | |
1348 | ||
1349 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1350 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
1351 | ||
13723d00 | 1352 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 1353 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1354 | group_bh, |
1355 | journal_type); | |
ccd979bd MF |
1356 | if (status < 0) { |
1357 | mlog_errno(status); | |
1358 | goto bail; | |
1359 | } | |
1360 | ||
1361 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); | |
ccd979bd MF |
1362 | while(num_bits--) |
1363 | ocfs2_set_bit(bit_off++, bitmap); | |
1364 | ||
ec20cec7 | 1365 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
1366 | |
1367 | bail: | |
1368 | mlog_exit(status); | |
1369 | return status; | |
1370 | } | |
1371 | ||
1372 | /* find the one with the most empty bits */ | |
1373 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) | |
1374 | { | |
1375 | u16 curr, best; | |
1376 | ||
1377 | BUG_ON(!cl->cl_next_free_rec); | |
1378 | ||
1379 | best = curr = 0; | |
1380 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { | |
1381 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > | |
1382 | le32_to_cpu(cl->cl_recs[best].c_free)) | |
1383 | best = curr; | |
1384 | curr++; | |
1385 | } | |
1386 | ||
1387 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); | |
1388 | return best; | |
1389 | } | |
1390 | ||
1fabe148 | 1391 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
1392 | struct inode *alloc_inode, |
1393 | struct buffer_head *fe_bh, | |
1394 | struct buffer_head *bg_bh, | |
1395 | struct buffer_head *prev_bg_bh, | |
1396 | u16 chain) | |
1397 | { | |
1398 | int status; | |
1399 | /* there is a really tiny chance the journal calls could fail, | |
1400 | * but we wouldn't want inconsistent blocks in *any* case. */ | |
1401 | u64 fe_ptr, bg_ptr, prev_bg_ptr; | |
1402 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
1403 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1404 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; | |
1405 | ||
42035306 JB |
1406 | /* The caller got these descriptors from |
1407 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1408 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
1409 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); | |
ccd979bd | 1410 | |
b0697053 | 1411 | mlog(0, "Suballoc %llu, chain %u, move group %llu to top, prev = %llu\n", |
1ca1a111 MF |
1412 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, |
1413 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1414 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); | |
ccd979bd MF |
1415 | |
1416 | fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno); | |
1417 | bg_ptr = le64_to_cpu(bg->bg_next_group); | |
1418 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); | |
1419 | ||
0cf2f763 JB |
1420 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1421 | prev_bg_bh, | |
13723d00 | 1422 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1423 | if (status < 0) { |
1424 | mlog_errno(status); | |
1425 | goto out_rollback; | |
1426 | } | |
1427 | ||
1428 | prev_bg->bg_next_group = bg->bg_next_group; | |
ec20cec7 | 1429 | ocfs2_journal_dirty(handle, prev_bg_bh); |
ccd979bd | 1430 | |
0cf2f763 JB |
1431 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1432 | bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1433 | if (status < 0) { |
1434 | mlog_errno(status); | |
1435 | goto out_rollback; | |
1436 | } | |
1437 | ||
1438 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; | |
ec20cec7 | 1439 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd | 1440 | |
0cf2f763 JB |
1441 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
1442 | fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1443 | if (status < 0) { |
1444 | mlog_errno(status); | |
1445 | goto out_rollback; | |
1446 | } | |
1447 | ||
1448 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; | |
ec20cec7 | 1449 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 1450 | |
ccd979bd MF |
1451 | out_rollback: |
1452 | if (status < 0) { | |
1453 | fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr); | |
1454 | bg->bg_next_group = cpu_to_le64(bg_ptr); | |
1455 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); | |
1456 | } | |
42035306 | 1457 | |
ccd979bd MF |
1458 | mlog_exit(status); |
1459 | return status; | |
1460 | } | |
1461 | ||
1462 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
1463 | u32 wanted) | |
1464 | { | |
1465 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; | |
1466 | } | |
1467 | ||
1468 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 | |
1469 | * value on error. */ | |
1470 | static int ocfs2_cluster_group_search(struct inode *inode, | |
1471 | struct buffer_head *group_bh, | |
1472 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1473 | u64 max_block, |
7d1fe093 | 1474 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1475 | { |
1476 | int search = -ENOSPC; | |
1477 | int ret; | |
1187c968 | 1478 | u64 blkoff; |
7bf72ede | 1479 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
9c7af40b | 1480 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bf72ede | 1481 | unsigned int max_bits, gd_cluster_off; |
ccd979bd MF |
1482 | |
1483 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1484 | ||
7bf72ede MF |
1485 | if (gd->bg_free_bits_count) { |
1486 | max_bits = le16_to_cpu(gd->bg_bits); | |
1487 | ||
1488 | /* Tail groups in cluster bitmaps which aren't cpg | |
1489 | * aligned are prone to partial extention by a failed | |
1490 | * fs resize. If the file system resize never got to | |
1491 | * update the dinode cluster count, then we don't want | |
1492 | * to trust any clusters past it, regardless of what | |
1493 | * the group descriptor says. */ | |
1494 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, | |
1495 | le64_to_cpu(gd->bg_blkno)); | |
1496 | if ((gd_cluster_off + max_bits) > | |
1497 | OCFS2_I(inode)->ip_clusters) { | |
1498 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; | |
1499 | mlog(0, "Desc %llu, bg_bits %u, clusters %u, use %u\n", | |
1500 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
1501 | le16_to_cpu(gd->bg_bits), | |
1502 | OCFS2_I(inode)->ip_clusters, max_bits); | |
1503 | } | |
1504 | ||
ccd979bd MF |
1505 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1506 | group_bh, bits_wanted, | |
7d1fe093 | 1507 | max_bits, res); |
ccd979bd MF |
1508 | if (ret) |
1509 | return ret; | |
1510 | ||
1187c968 JB |
1511 | if (max_block) { |
1512 | blkoff = ocfs2_clusters_to_blocks(inode->i_sb, | |
1513 | gd_cluster_off + | |
7d1fe093 JB |
1514 | res->sr_bit_offset + |
1515 | res->sr_bits); | |
1187c968 JB |
1516 | mlog(0, "Checking %llu against %llu\n", |
1517 | (unsigned long long)blkoff, | |
1518 | (unsigned long long)max_block); | |
1519 | if (blkoff > max_block) | |
1520 | return -ENOSPC; | |
1521 | } | |
1522 | ||
ccd979bd MF |
1523 | /* ocfs2_block_group_find_clear_bits() might |
1524 | * return success, but we still want to return | |
1525 | * -ENOSPC unless it found the minimum number | |
1526 | * of bits. */ | |
7d1fe093 | 1527 | if (min_bits <= res->sr_bits) |
ccd979bd | 1528 | search = 0; /* success */ |
7d1fe093 | 1529 | else if (res->sr_bits) { |
9c7af40b MF |
1530 | /* |
1531 | * Don't show bits which we'll be returning | |
1532 | * for allocation to the local alloc bitmap. | |
1533 | */ | |
7d1fe093 | 1534 | ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); |
ccd979bd MF |
1535 | } |
1536 | } | |
1537 | ||
1538 | return search; | |
1539 | } | |
1540 | ||
1541 | static int ocfs2_block_group_search(struct inode *inode, | |
1542 | struct buffer_head *group_bh, | |
1543 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1544 | u64 max_block, |
7d1fe093 | 1545 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1546 | { |
1547 | int ret = -ENOSPC; | |
1187c968 | 1548 | u64 blkoff; |
ccd979bd MF |
1549 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; |
1550 | ||
1551 | BUG_ON(min_bits != 1); | |
1552 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); | |
1553 | ||
1187c968 | 1554 | if (bg->bg_free_bits_count) { |
ccd979bd MF |
1555 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1556 | group_bh, bits_wanted, | |
7bf72ede | 1557 | le16_to_cpu(bg->bg_bits), |
7d1fe093 | 1558 | res); |
1187c968 | 1559 | if (!ret && max_block) { |
7d1fe093 JB |
1560 | blkoff = le64_to_cpu(bg->bg_blkno) + |
1561 | res->sr_bit_offset + res->sr_bits; | |
1187c968 JB |
1562 | mlog(0, "Checking %llu against %llu\n", |
1563 | (unsigned long long)blkoff, | |
1564 | (unsigned long long)max_block); | |
1565 | if (blkoff > max_block) | |
1566 | ret = -ENOSPC; | |
1567 | } | |
1568 | } | |
ccd979bd MF |
1569 | |
1570 | return ret; | |
1571 | } | |
1572 | ||
883d4cae | 1573 | static int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
1fabe148 | 1574 | handle_t *handle, |
883d4cae MF |
1575 | struct buffer_head *di_bh, |
1576 | u32 num_bits, | |
1577 | u16 chain) | |
1578 | { | |
1579 | int ret; | |
1580 | u32 tmp_used; | |
1581 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1582 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; | |
1583 | ||
0cf2f763 | 1584 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
13723d00 | 1585 | OCFS2_JOURNAL_ACCESS_WRITE); |
883d4cae MF |
1586 | if (ret < 0) { |
1587 | mlog_errno(ret); | |
1588 | goto out; | |
1589 | } | |
1590 | ||
1591 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1592 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); | |
1593 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); | |
ec20cec7 | 1594 | ocfs2_journal_dirty(handle, di_bh); |
883d4cae MF |
1595 | |
1596 | out: | |
1597 | return ret; | |
1598 | } | |
1599 | ||
ba206635 JB |
1600 | static int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, |
1601 | struct ocfs2_extent_rec *rec, | |
1602 | struct ocfs2_chain_list *cl) | |
13e434cf JB |
1603 | { |
1604 | unsigned int bpc = le16_to_cpu(cl->cl_bpc); | |
1605 | unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; | |
1606 | unsigned int bitcount = le32_to_cpu(rec->e_leaf_clusters) * bpc; | |
1607 | ||
1608 | if (res->sr_bit_offset < bitoff) | |
1609 | return 0; | |
1610 | if (res->sr_bit_offset >= (bitoff + bitcount)) | |
1611 | return 0; | |
ba206635 JB |
1612 | res->sr_blkno = le64_to_cpu(rec->e_blkno) + |
1613 | (res->sr_bit_offset - bitoff); | |
13e434cf JB |
1614 | if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) |
1615 | res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; | |
1616 | return 1; | |
1617 | } | |
1618 | ||
ba206635 JB |
1619 | static void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, |
1620 | struct ocfs2_group_desc *bg, | |
1621 | struct ocfs2_suballoc_result *res) | |
13e434cf JB |
1622 | { |
1623 | int i; | |
2b6cb576 | 1624 | u64 bg_blkno = res->sr_bg_blkno; /* Save off */ |
13e434cf JB |
1625 | struct ocfs2_extent_rec *rec; |
1626 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; | |
1627 | struct ocfs2_chain_list *cl = &di->id2.i_chain; | |
1628 | ||
ba206635 JB |
1629 | if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { |
1630 | res->sr_blkno = 0; | |
13e434cf | 1631 | return; |
ba206635 | 1632 | } |
13e434cf | 1633 | |
ba206635 | 1634 | res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; |
2b6cb576 | 1635 | res->sr_bg_blkno = 0; /* Clear it for contig block groups */ |
4711954e | 1636 | if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || |
ba206635 | 1637 | !bg->bg_list.l_next_free_rec) |
13e434cf JB |
1638 | return; |
1639 | ||
1640 | for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { | |
1641 | rec = &bg->bg_list.l_recs[i]; | |
2b6cb576 JB |
1642 | if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { |
1643 | res->sr_bg_blkno = bg_blkno; /* Restore */ | |
13e434cf | 1644 | break; |
2b6cb576 | 1645 | } |
13e434cf JB |
1646 | } |
1647 | } | |
1648 | ||
883d4cae | 1649 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, |
1fabe148 | 1650 | handle_t *handle, |
883d4cae MF |
1651 | u32 bits_wanted, |
1652 | u32 min_bits, | |
7d1fe093 | 1653 | struct ocfs2_suballoc_result *res, |
883d4cae MF |
1654 | u16 *bits_left) |
1655 | { | |
1656 | int ret; | |
883d4cae MF |
1657 | struct buffer_head *group_bh = NULL; |
1658 | struct ocfs2_group_desc *gd; | |
68f64d47 | 1659 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; |
883d4cae | 1660 | struct inode *alloc_inode = ac->ac_inode; |
883d4cae | 1661 | |
7d1fe093 JB |
1662 | ret = ocfs2_read_group_descriptor(alloc_inode, di, |
1663 | res->sr_bg_blkno, &group_bh); | |
883d4cae MF |
1664 | if (ret < 0) { |
1665 | mlog_errno(ret); | |
1666 | return ret; | |
1667 | } | |
1668 | ||
1669 | gd = (struct ocfs2_group_desc *) group_bh->b_data; | |
883d4cae | 1670 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, |
7d1fe093 | 1671 | ac->ac_max_block, res); |
883d4cae MF |
1672 | if (ret < 0) { |
1673 | if (ret != -ENOSPC) | |
1674 | mlog_errno(ret); | |
1675 | goto out; | |
1676 | } | |
1677 | ||
13e434cf | 1678 | if (!ret) |
ba206635 | 1679 | ocfs2_bg_discontig_fix_result(ac, gd, res); |
13e434cf | 1680 | |
883d4cae | 1681 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, |
7d1fe093 | 1682 | res->sr_bits, |
883d4cae MF |
1683 | le16_to_cpu(gd->bg_chain)); |
1684 | if (ret < 0) { | |
1685 | mlog_errno(ret); | |
1686 | goto out; | |
1687 | } | |
1688 | ||
1689 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, | |
7d1fe093 | 1690 | res->sr_bit_offset, res->sr_bits); |
883d4cae MF |
1691 | if (ret < 0) |
1692 | mlog_errno(ret); | |
1693 | ||
1694 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); | |
1695 | ||
1696 | out: | |
1697 | brelse(group_bh); | |
1698 | ||
1699 | return ret; | |
1700 | } | |
1701 | ||
ccd979bd | 1702 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
1fabe148 | 1703 | handle_t *handle, |
ccd979bd MF |
1704 | u32 bits_wanted, |
1705 | u32 min_bits, | |
7d1fe093 | 1706 | struct ocfs2_suballoc_result *res, |
883d4cae | 1707 | u16 *bits_left) |
ccd979bd MF |
1708 | { |
1709 | int status; | |
7d1fe093 | 1710 | u16 chain; |
ccd979bd MF |
1711 | u32 tmp_used; |
1712 | u64 next_group; | |
ccd979bd MF |
1713 | struct inode *alloc_inode = ac->ac_inode; |
1714 | struct buffer_head *group_bh = NULL; | |
1715 | struct buffer_head *prev_group_bh = NULL; | |
1716 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1717 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; | |
1718 | struct ocfs2_group_desc *bg; | |
1719 | ||
1720 | chain = ac->ac_chain; | |
b0697053 MF |
1721 | mlog(0, "trying to alloc %u bits from chain %u, inode %llu\n", |
1722 | bits_wanted, chain, | |
1723 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno); | |
ccd979bd | 1724 | |
68f64d47 JB |
1725 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1726 | le64_to_cpu(cl->cl_recs[chain].c_blkno), | |
1727 | &group_bh); | |
ccd979bd MF |
1728 | if (status < 0) { |
1729 | mlog_errno(status); | |
1730 | goto bail; | |
1731 | } | |
1732 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1733 | |
1734 | status = -ENOSPC; | |
1735 | /* for now, the chain search is a bit simplistic. We just use | |
1736 | * the 1st group with any empty bits. */ | |
1187c968 JB |
1737 | while ((status = ac->ac_group_search(alloc_inode, group_bh, |
1738 | bits_wanted, min_bits, | |
7d1fe093 JB |
1739 | ac->ac_max_block, |
1740 | res)) == -ENOSPC) { | |
ccd979bd MF |
1741 | if (!bg->bg_next_group) |
1742 | break; | |
a81cb88b MF |
1743 | |
1744 | brelse(prev_group_bh); | |
1745 | prev_group_bh = NULL; | |
1746 | ||
ccd979bd MF |
1747 | next_group = le64_to_cpu(bg->bg_next_group); |
1748 | prev_group_bh = group_bh; | |
1749 | group_bh = NULL; | |
68f64d47 JB |
1750 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1751 | next_group, &group_bh); | |
ccd979bd MF |
1752 | if (status < 0) { |
1753 | mlog_errno(status); | |
1754 | goto bail; | |
1755 | } | |
1756 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1757 | } |
1758 | if (status < 0) { | |
1759 | if (status != -ENOSPC) | |
1760 | mlog_errno(status); | |
1761 | goto bail; | |
1762 | } | |
1763 | ||
b0697053 | 1764 | mlog(0, "alloc succeeds: we give %u bits from block group %llu\n", |
7d1fe093 | 1765 | res->sr_bits, (unsigned long long)le64_to_cpu(bg->bg_blkno)); |
ccd979bd | 1766 | |
7d1fe093 | 1767 | res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); |
ccd979bd | 1768 | |
7d1fe093 | 1769 | BUG_ON(res->sr_bits == 0); |
13e434cf | 1770 | if (!status) |
ba206635 | 1771 | ocfs2_bg_discontig_fix_result(ac, bg, res); |
13e434cf | 1772 | |
ccd979bd MF |
1773 | |
1774 | /* | |
1775 | * Keep track of previous block descriptor read. When | |
1776 | * we find a target, if we have read more than X | |
1777 | * number of descriptors, and the target is reasonably | |
1778 | * empty, relink him to top of his chain. | |
1779 | * | |
1780 | * We've read 0 extra blocks and only send one more to | |
1781 | * the transaction, yet the next guy to search has a | |
1782 | * much easier time. | |
1783 | * | |
1784 | * Do this *after* figuring out how many bits we're taking out | |
1785 | * of our target group. | |
1786 | */ | |
1787 | if (ac->ac_allow_chain_relink && | |
1788 | (prev_group_bh) && | |
7d1fe093 | 1789 | (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { |
ccd979bd MF |
1790 | status = ocfs2_relink_block_group(handle, alloc_inode, |
1791 | ac->ac_bh, group_bh, | |
1792 | prev_group_bh, chain); | |
1793 | if (status < 0) { | |
1794 | mlog_errno(status); | |
1795 | goto bail; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | /* Ok, claim our bits now: set the info on dinode, chainlist | |
1800 | * and then the group */ | |
13723d00 | 1801 | status = ocfs2_journal_access_di(handle, |
0cf2f763 | 1802 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1803 | ac->ac_bh, |
1804 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1805 | if (status < 0) { |
1806 | mlog_errno(status); | |
1807 | goto bail; | |
1808 | } | |
1809 | ||
1810 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
7d1fe093 JB |
1811 | fe->id1.bitmap1.i_used = cpu_to_le32(res->sr_bits + tmp_used); |
1812 | le32_add_cpu(&cl->cl_recs[chain].c_free, -res->sr_bits); | |
ec20cec7 | 1813 | ocfs2_journal_dirty(handle, ac->ac_bh); |
ccd979bd MF |
1814 | |
1815 | status = ocfs2_block_group_set_bits(handle, | |
1816 | alloc_inode, | |
1817 | bg, | |
1818 | group_bh, | |
7d1fe093 JB |
1819 | res->sr_bit_offset, |
1820 | res->sr_bits); | |
ccd979bd MF |
1821 | if (status < 0) { |
1822 | mlog_errno(status); | |
1823 | goto bail; | |
1824 | } | |
1825 | ||
7d1fe093 | 1826 | mlog(0, "Allocated %u bits from suballocator %llu\n", res->sr_bits, |
1ca1a111 | 1827 | (unsigned long long)le64_to_cpu(fe->i_blkno)); |
ccd979bd | 1828 | |
883d4cae | 1829 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
ccd979bd | 1830 | bail: |
a81cb88b MF |
1831 | brelse(group_bh); |
1832 | brelse(prev_group_bh); | |
ccd979bd MF |
1833 | |
1834 | mlog_exit(status); | |
1835 | return status; | |
1836 | } | |
1837 | ||
1838 | /* will give out up to bits_wanted contiguous bits. */ | |
aa8f8e93 | 1839 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 1840 | handle_t *handle, |
ccd979bd MF |
1841 | u32 bits_wanted, |
1842 | u32 min_bits, | |
7d1fe093 | 1843 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1844 | { |
1845 | int status; | |
1846 | u16 victim, i; | |
883d4cae | 1847 | u16 bits_left = 0; |
ccd979bd MF |
1848 | struct ocfs2_chain_list *cl; |
1849 | struct ocfs2_dinode *fe; | |
1850 | ||
1851 | mlog_entry_void(); | |
1852 | ||
1853 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); | |
1854 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); | |
1855 | BUG_ON(!ac->ac_bh); | |
1856 | ||
1857 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
10995aa2 JB |
1858 | |
1859 | /* The bh was validated by the inode read during | |
1860 | * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ | |
1861 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
1862 | ||
ccd979bd MF |
1863 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= |
1864 | le32_to_cpu(fe->id1.bitmap1.i_total)) { | |
aa8f8e93 JB |
1865 | ocfs2_error(ac->ac_inode->i_sb, |
1866 | "Chain allocator dinode %llu has %u used " | |
b0697053 MF |
1867 | "bits but only %u total.", |
1868 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
ccd979bd MF |
1869 | le32_to_cpu(fe->id1.bitmap1.i_used), |
1870 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
1871 | status = -EIO; | |
1872 | goto bail; | |
1873 | } | |
1874 | ||
7d1fe093 JB |
1875 | res->sr_bg_blkno = ac->ac_last_group; |
1876 | if (res->sr_bg_blkno) { | |
883d4cae MF |
1877 | /* Attempt to short-circuit the usual search mechanism |
1878 | * by jumping straight to the most recently used | |
1879 | * allocation group. This helps us mantain some | |
1880 | * contiguousness across allocations. */ | |
da5cbf2f | 1881 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
7d1fe093 JB |
1882 | min_bits, res, &bits_left); |
1883 | if (!status) | |
883d4cae | 1884 | goto set_hint; |
883d4cae MF |
1885 | if (status < 0 && status != -ENOSPC) { |
1886 | mlog_errno(status); | |
1887 | goto bail; | |
1888 | } | |
1889 | } | |
1890 | ||
ccd979bd MF |
1891 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
1892 | ||
1893 | victim = ocfs2_find_victim_chain(cl); | |
1894 | ac->ac_chain = victim; | |
1895 | ac->ac_allow_chain_relink = 1; | |
1896 | ||
7d1fe093 JB |
1897 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
1898 | res, &bits_left); | |
ccd979bd | 1899 | if (!status) |
883d4cae | 1900 | goto set_hint; |
ccd979bd MF |
1901 | if (status < 0 && status != -ENOSPC) { |
1902 | mlog_errno(status); | |
1903 | goto bail; | |
1904 | } | |
1905 | ||
1906 | mlog(0, "Search of victim chain %u came up with nothing, " | |
1907 | "trying all chains now.\n", victim); | |
1908 | ||
1909 | /* If we didn't pick a good victim, then just default to | |
1910 | * searching each chain in order. Don't allow chain relinking | |
1911 | * because we only calculate enough journal credits for one | |
1912 | * relink per alloc. */ | |
1913 | ac->ac_allow_chain_relink = 0; | |
1914 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { | |
1915 | if (i == victim) | |
1916 | continue; | |
1917 | if (!cl->cl_recs[i].c_free) | |
1918 | continue; | |
1919 | ||
1920 | ac->ac_chain = i; | |
da5cbf2f | 1921 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
7d1fe093 | 1922 | res, &bits_left); |
ccd979bd MF |
1923 | if (!status) |
1924 | break; | |
1925 | if (status < 0 && status != -ENOSPC) { | |
1926 | mlog_errno(status); | |
1927 | goto bail; | |
1928 | } | |
1929 | } | |
ccd979bd | 1930 | |
883d4cae MF |
1931 | set_hint: |
1932 | if (status != -ENOSPC) { | |
1933 | /* If the next search of this group is not likely to | |
1934 | * yield a suitable extent, then we reset the last | |
1935 | * group hint so as to not waste a disk read */ | |
1936 | if (bits_left < min_bits) | |
1937 | ac->ac_last_group = 0; | |
1938 | else | |
7d1fe093 | 1939 | ac->ac_last_group = res->sr_bg_blkno; |
883d4cae MF |
1940 | } |
1941 | ||
1942 | bail: | |
ccd979bd MF |
1943 | mlog_exit(status); |
1944 | return status; | |
1945 | } | |
1946 | ||
1ed9b777 | 1947 | int ocfs2_claim_metadata(handle_t *handle, |
ccd979bd MF |
1948 | struct ocfs2_alloc_context *ac, |
1949 | u32 bits_wanted, | |
2b6cb576 | 1950 | u64 *suballoc_loc, |
ccd979bd MF |
1951 | u16 *suballoc_bit_start, |
1952 | unsigned int *num_bits, | |
1953 | u64 *blkno_start) | |
1954 | { | |
1955 | int status; | |
ba206635 | 1956 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
ccd979bd MF |
1957 | |
1958 | BUG_ON(!ac); | |
1959 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); | |
1960 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); | |
ccd979bd | 1961 | |
aa8f8e93 | 1962 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 1963 | handle, |
ccd979bd MF |
1964 | bits_wanted, |
1965 | 1, | |
7d1fe093 | 1966 | &res); |
ccd979bd MF |
1967 | if (status < 0) { |
1968 | mlog_errno(status); | |
1969 | goto bail; | |
1970 | } | |
1ed9b777 | 1971 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 1972 | |
2b6cb576 | 1973 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 1974 | *suballoc_bit_start = res.sr_bit_offset; |
ba206635 | 1975 | *blkno_start = res.sr_blkno; |
7d1fe093 JB |
1976 | ac->ac_bits_given += res.sr_bits; |
1977 | *num_bits = res.sr_bits; | |
ccd979bd MF |
1978 | status = 0; |
1979 | bail: | |
1980 | mlog_exit(status); | |
1981 | return status; | |
1982 | } | |
1983 | ||
13821151 | 1984 | static void ocfs2_init_inode_ac_group(struct inode *dir, |
abf1b3cb | 1985 | struct buffer_head *parent_di_bh, |
13821151 TM |
1986 | struct ocfs2_alloc_context *ac) |
1987 | { | |
abf1b3cb | 1988 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data; |
13821151 TM |
1989 | /* |
1990 | * Try to allocate inodes from some specific group. | |
1991 | * | |
1992 | * If the parent dir has recorded the last group used in allocation, | |
1993 | * cool, use it. Otherwise if we try to allocate new inode from the | |
1994 | * same slot the parent dir belongs to, use the same chunk. | |
1995 | * | |
1996 | * We are very careful here to avoid the mistake of setting | |
1997 | * ac_last_group to a group descriptor from a different (unlocked) slot. | |
1998 | */ | |
1999 | if (OCFS2_I(dir)->ip_last_used_group && | |
2000 | OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) | |
2001 | ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; | |
abf1b3cb TM |
2002 | else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) { |
2003 | if (di->i_suballoc_loc) | |
2004 | ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc); | |
2005 | else | |
2006 | ac->ac_last_group = ocfs2_which_suballoc_group( | |
2007 | le64_to_cpu(di->i_blkno), | |
2008 | le16_to_cpu(di->i_suballoc_bit)); | |
2009 | } | |
13821151 TM |
2010 | } |
2011 | ||
2012 | static inline void ocfs2_save_inode_ac_group(struct inode *dir, | |
2013 | struct ocfs2_alloc_context *ac) | |
2014 | { | |
2015 | OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; | |
2016 | OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; | |
2017 | } | |
2018 | ||
1ed9b777 | 2019 | int ocfs2_claim_new_inode(handle_t *handle, |
13821151 TM |
2020 | struct inode *dir, |
2021 | struct buffer_head *parent_fe_bh, | |
ccd979bd | 2022 | struct ocfs2_alloc_context *ac, |
2b6cb576 | 2023 | u64 *suballoc_loc, |
ccd979bd MF |
2024 | u16 *suballoc_bit, |
2025 | u64 *fe_blkno) | |
2026 | { | |
2027 | int status; | |
2b6cb576 | 2028 | struct ocfs2_suballoc_result res; |
ccd979bd MF |
2029 | |
2030 | mlog_entry_void(); | |
2031 | ||
2032 | BUG_ON(!ac); | |
2033 | BUG_ON(ac->ac_bits_given != 0); | |
2034 | BUG_ON(ac->ac_bits_wanted != 1); | |
2035 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
ccd979bd | 2036 | |
13821151 TM |
2037 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); |
2038 | ||
aa8f8e93 | 2039 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2040 | handle, |
ccd979bd MF |
2041 | 1, |
2042 | 1, | |
7d1fe093 | 2043 | &res); |
ccd979bd MF |
2044 | if (status < 0) { |
2045 | mlog_errno(status); | |
2046 | goto bail; | |
2047 | } | |
1ed9b777 | 2048 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2049 | |
7d1fe093 | 2050 | BUG_ON(res.sr_bits != 1); |
ccd979bd | 2051 | |
2b6cb576 | 2052 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2053 | *suballoc_bit = res.sr_bit_offset; |
ba206635 | 2054 | *fe_blkno = res.sr_blkno; |
ccd979bd | 2055 | ac->ac_bits_given++; |
13821151 | 2056 | ocfs2_save_inode_ac_group(dir, ac); |
ccd979bd MF |
2057 | status = 0; |
2058 | bail: | |
2059 | mlog_exit(status); | |
2060 | return status; | |
2061 | } | |
2062 | ||
2063 | /* translate a group desc. blkno and it's bitmap offset into | |
2064 | * disk cluster offset. */ | |
2065 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, | |
2066 | u64 bg_blkno, | |
2067 | u16 bg_bit_off) | |
2068 | { | |
2069 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2070 | u32 cluster = 0; | |
2071 | ||
2072 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2073 | ||
2074 | if (bg_blkno != osb->first_cluster_group_blkno) | |
2075 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); | |
2076 | cluster += (u32) bg_bit_off; | |
2077 | return cluster; | |
2078 | } | |
2079 | ||
2080 | /* given a cluster offset, calculate which block group it belongs to | |
2081 | * and return that block offset. */ | |
d659072f | 2082 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
ccd979bd MF |
2083 | { |
2084 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2085 | u32 group_no; | |
2086 | ||
2087 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2088 | ||
2089 | group_no = cluster / osb->bitmap_cpg; | |
2090 | if (!group_no) | |
2091 | return osb->first_cluster_group_blkno; | |
2092 | return ocfs2_clusters_to_blocks(inode->i_sb, | |
2093 | group_no * osb->bitmap_cpg); | |
2094 | } | |
2095 | ||
2096 | /* given the block number of a cluster start, calculate which cluster | |
2097 | * group and descriptor bitmap offset that corresponds to. */ | |
2098 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, | |
2099 | u64 data_blkno, | |
2100 | u64 *bg_blkno, | |
2101 | u16 *bg_bit_off) | |
2102 | { | |
2103 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2104 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); | |
2105 | ||
2106 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2107 | ||
2108 | *bg_blkno = ocfs2_which_cluster_group(inode, | |
2109 | data_cluster); | |
2110 | ||
2111 | if (*bg_blkno == osb->first_cluster_group_blkno) | |
2112 | *bg_bit_off = (u16) data_cluster; | |
2113 | else | |
2114 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, | |
2115 | data_blkno - *bg_blkno); | |
2116 | } | |
2117 | ||
2118 | /* | |
2119 | * min_bits - minimum contiguous chunk from this total allocation we | |
2120 | * can handle. set to what we asked for originally for a full | |
2121 | * contig. allocation, set to '1' to indicate we can deal with extents | |
2122 | * of any size. | |
2123 | */ | |
1ed9b777 | 2124 | int __ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2125 | struct ocfs2_alloc_context *ac, |
2126 | u32 min_clusters, | |
2127 | u32 max_clusters, | |
2128 | u32 *cluster_start, | |
2129 | u32 *num_clusters) | |
ccd979bd MF |
2130 | { |
2131 | int status; | |
415cb800 | 2132 | unsigned int bits_wanted = max_clusters; |
ba206635 | 2133 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
1ed9b777 | 2134 | struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); |
ccd979bd MF |
2135 | |
2136 | mlog_entry_void(); | |
2137 | ||
ccd979bd MF |
2138 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
2139 | ||
2140 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL | |
2141 | && ac->ac_which != OCFS2_AC_USE_MAIN); | |
ccd979bd MF |
2142 | |
2143 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { | |
33d5d380 MF |
2144 | WARN_ON(min_clusters > 1); |
2145 | ||
ccd979bd MF |
2146 | status = ocfs2_claim_local_alloc_bits(osb, |
2147 | handle, | |
2148 | ac, | |
2149 | bits_wanted, | |
2150 | cluster_start, | |
2151 | num_clusters); | |
2152 | if (!status) | |
2153 | atomic_inc(&osb->alloc_stats.local_data); | |
2154 | } else { | |
2155 | if (min_clusters > (osb->bitmap_cpg - 1)) { | |
2156 | /* The only paths asking for contiguousness | |
2157 | * should know about this already. */ | |
2fbe8d1e SM |
2158 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
2159 | "group bitmap size %u!\n", min_clusters, | |
2160 | osb->bitmap_cpg); | |
ccd979bd MF |
2161 | status = -ENOSPC; |
2162 | goto bail; | |
2163 | } | |
2164 | /* clamp the current request down to a realistic size. */ | |
2165 | if (bits_wanted > (osb->bitmap_cpg - 1)) | |
2166 | bits_wanted = osb->bitmap_cpg - 1; | |
2167 | ||
aa8f8e93 | 2168 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2169 | handle, |
ccd979bd MF |
2170 | bits_wanted, |
2171 | min_clusters, | |
7d1fe093 | 2172 | &res); |
ccd979bd | 2173 | if (!status) { |
ba206635 | 2174 | BUG_ON(res.sr_blkno); /* cluster alloc can't set */ |
ccd979bd MF |
2175 | *cluster_start = |
2176 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, | |
7d1fe093 JB |
2177 | res.sr_bg_blkno, |
2178 | res.sr_bit_offset); | |
ccd979bd | 2179 | atomic_inc(&osb->alloc_stats.bitmap_data); |
4711954e | 2180 | *num_clusters = res.sr_bits; |
ccd979bd MF |
2181 | } |
2182 | } | |
2183 | if (status < 0) { | |
2184 | if (status != -ENOSPC) | |
2185 | mlog_errno(status); | |
2186 | goto bail; | |
2187 | } | |
2188 | ||
4711954e | 2189 | ac->ac_bits_given += *num_clusters; |
ccd979bd MF |
2190 | |
2191 | bail: | |
2192 | mlog_exit(status); | |
2193 | return status; | |
2194 | } | |
2195 | ||
1ed9b777 | 2196 | int ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2197 | struct ocfs2_alloc_context *ac, |
2198 | u32 min_clusters, | |
2199 | u32 *cluster_start, | |
2200 | u32 *num_clusters) | |
2201 | { | |
2202 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; | |
2203 | ||
1ed9b777 | 2204 | return __ocfs2_claim_clusters(handle, ac, min_clusters, |
415cb800 MF |
2205 | bits_wanted, cluster_start, num_clusters); |
2206 | } | |
2207 | ||
b4414eea MF |
2208 | static int ocfs2_block_group_clear_bits(handle_t *handle, |
2209 | struct inode *alloc_inode, | |
2210 | struct ocfs2_group_desc *bg, | |
2211 | struct buffer_head *group_bh, | |
2212 | unsigned int bit_off, | |
2213 | unsigned int num_bits, | |
2214 | void (*undo_fn)(unsigned int bit, | |
2215 | unsigned long *bmap)) | |
ccd979bd MF |
2216 | { |
2217 | int status; | |
2218 | unsigned int tmp; | |
ccd979bd MF |
2219 | struct ocfs2_group_desc *undo_bg = NULL; |
2220 | ||
2221 | mlog_entry_void(); | |
2222 | ||
42035306 JB |
2223 | /* The caller got this descriptor from |
2224 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
2225 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
2226 | |
2227 | mlog(0, "off = %u, num = %u\n", bit_off, num_bits); | |
2228 | ||
b4414eea | 2229 | BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); |
0cf2f763 | 2230 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
b4414eea MF |
2231 | group_bh, |
2232 | undo_fn ? | |
2233 | OCFS2_JOURNAL_ACCESS_UNDO : | |
2234 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2235 | if (status < 0) { |
2236 | mlog_errno(status); | |
2237 | goto bail; | |
2238 | } | |
2239 | ||
b4414eea | 2240 | if (undo_fn) { |
94e41ecf SM |
2241 | jbd_lock_bh_state(group_bh); |
2242 | undo_bg = (struct ocfs2_group_desc *) | |
2243 | bh2jh(group_bh)->b_committed_data; | |
2244 | BUG_ON(!undo_bg); | |
2245 | } | |
ccd979bd MF |
2246 | |
2247 | tmp = num_bits; | |
2248 | while(tmp--) { | |
2249 | ocfs2_clear_bit((bit_off + tmp), | |
2250 | (unsigned long *) bg->bg_bitmap); | |
b4414eea MF |
2251 | if (undo_fn) |
2252 | undo_fn(bit_off + tmp, | |
2253 | (unsigned long *) undo_bg->bg_bitmap); | |
ccd979bd MF |
2254 | } |
2255 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); | |
2256 | ||
b4414eea | 2257 | if (undo_fn) |
94e41ecf SM |
2258 | jbd_unlock_bh_state(group_bh); |
2259 | ||
ec20cec7 | 2260 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
2261 | bail: |
2262 | return status; | |
2263 | } | |
2264 | ||
2265 | /* | |
2266 | * expects the suballoc inode to already be locked. | |
2267 | */ | |
b4414eea MF |
2268 | static int _ocfs2_free_suballoc_bits(handle_t *handle, |
2269 | struct inode *alloc_inode, | |
2270 | struct buffer_head *alloc_bh, | |
2271 | unsigned int start_bit, | |
2272 | u64 bg_blkno, | |
2273 | unsigned int count, | |
2274 | void (*undo_fn)(unsigned int bit, | |
2275 | unsigned long *bitmap)) | |
ccd979bd MF |
2276 | { |
2277 | int status = 0; | |
2278 | u32 tmp_used; | |
ccd979bd MF |
2279 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; |
2280 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; | |
2281 | struct buffer_head *group_bh = NULL; | |
2282 | struct ocfs2_group_desc *group; | |
2283 | ||
2284 | mlog_entry_void(); | |
2285 | ||
10995aa2 JB |
2286 | /* The alloc_bh comes from ocfs2_free_dinode() or |
2287 | * ocfs2_free_clusters(). The callers have all locked the | |
2288 | * allocator and gotten alloc_bh from the lock call. This | |
2289 | * validates the dinode buffer. Any corruption that has happended | |
2290 | * is a code bug. */ | |
2291 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
ccd979bd MF |
2292 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); |
2293 | ||
b0697053 MF |
2294 | mlog(0, "%llu: freeing %u bits from group %llu, starting at %u\n", |
2295 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count, | |
2296 | (unsigned long long)bg_blkno, start_bit); | |
ccd979bd | 2297 | |
68f64d47 JB |
2298 | status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, |
2299 | &group_bh); | |
ccd979bd MF |
2300 | if (status < 0) { |
2301 | mlog_errno(status); | |
2302 | goto bail; | |
2303 | } | |
ccd979bd | 2304 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
68f64d47 | 2305 | |
ccd979bd MF |
2306 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); |
2307 | ||
2308 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, | |
2309 | group, group_bh, | |
b4414eea | 2310 | start_bit, count, undo_fn); |
ccd979bd MF |
2311 | if (status < 0) { |
2312 | mlog_errno(status); | |
2313 | goto bail; | |
2314 | } | |
2315 | ||
0cf2f763 JB |
2316 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
2317 | alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2318 | if (status < 0) { |
2319 | mlog_errno(status); | |
2320 | goto bail; | |
2321 | } | |
2322 | ||
2323 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, | |
2324 | count); | |
2325 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
2326 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); | |
ec20cec7 | 2327 | ocfs2_journal_dirty(handle, alloc_bh); |
ccd979bd MF |
2328 | |
2329 | bail: | |
a81cb88b | 2330 | brelse(group_bh); |
ccd979bd MF |
2331 | |
2332 | mlog_exit(status); | |
2333 | return status; | |
2334 | } | |
2335 | ||
b4414eea MF |
2336 | int ocfs2_free_suballoc_bits(handle_t *handle, |
2337 | struct inode *alloc_inode, | |
2338 | struct buffer_head *alloc_bh, | |
2339 | unsigned int start_bit, | |
2340 | u64 bg_blkno, | |
2341 | unsigned int count) | |
2342 | { | |
2343 | return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, | |
2344 | start_bit, bg_blkno, count, NULL); | |
2345 | } | |
2346 | ||
1fabe148 | 2347 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
2348 | struct inode *inode_alloc_inode, |
2349 | struct buffer_head *inode_alloc_bh, | |
2350 | struct ocfs2_dinode *di) | |
2351 | { | |
2352 | u64 blk = le64_to_cpu(di->i_blkno); | |
2353 | u16 bit = le16_to_cpu(di->i_suballoc_bit); | |
2354 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2355 | ||
74380c47 TM |
2356 | if (di->i_suballoc_loc) |
2357 | bg_blkno = le64_to_cpu(di->i_suballoc_loc); | |
ccd979bd MF |
2358 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, |
2359 | inode_alloc_bh, bit, bg_blkno, 1); | |
2360 | } | |
2361 | ||
b4414eea MF |
2362 | static int _ocfs2_free_clusters(handle_t *handle, |
2363 | struct inode *bitmap_inode, | |
2364 | struct buffer_head *bitmap_bh, | |
2365 | u64 start_blk, | |
2366 | unsigned int num_clusters, | |
2367 | void (*undo_fn)(unsigned int bit, | |
2368 | unsigned long *bitmap)) | |
ccd979bd MF |
2369 | { |
2370 | int status; | |
2371 | u16 bg_start_bit; | |
2372 | u64 bg_blkno; | |
2373 | struct ocfs2_dinode *fe; | |
2374 | ||
2375 | /* You can't ever have a contiguous set of clusters | |
2376 | * bigger than a block group bitmap so we never have to worry | |
2377 | * about looping on them. */ | |
2378 | ||
2379 | mlog_entry_void(); | |
2380 | ||
2381 | /* This is expensive. We can safely remove once this stuff has | |
2382 | * gotten tested really well. */ | |
2383 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); | |
2384 | ||
2385 | fe = (struct ocfs2_dinode *) bitmap_bh->b_data; | |
2386 | ||
2387 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, | |
2388 | &bg_start_bit); | |
2389 | ||
b0697053 MF |
2390 | mlog(0, "want to free %u clusters starting at block %llu\n", |
2391 | num_clusters, (unsigned long long)start_blk); | |
2392 | mlog(0, "bg_blkno = %llu, bg_start_bit = %u\n", | |
2393 | (unsigned long long)bg_blkno, bg_start_bit); | |
ccd979bd | 2394 | |
b4414eea MF |
2395 | status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, |
2396 | bg_start_bit, bg_blkno, | |
2397 | num_clusters, undo_fn); | |
9c7af40b | 2398 | if (status < 0) { |
ccd979bd | 2399 | mlog_errno(status); |
9c7af40b MF |
2400 | goto out; |
2401 | } | |
2402 | ||
2403 | ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), | |
2404 | num_clusters); | |
ccd979bd | 2405 | |
9c7af40b | 2406 | out: |
ccd979bd MF |
2407 | mlog_exit(status); |
2408 | return status; | |
2409 | } | |
2410 | ||
b4414eea MF |
2411 | int ocfs2_free_clusters(handle_t *handle, |
2412 | struct inode *bitmap_inode, | |
2413 | struct buffer_head *bitmap_bh, | |
2414 | u64 start_blk, | |
2415 | unsigned int num_clusters) | |
2416 | { | |
2417 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2418 | start_blk, num_clusters, | |
2419 | _ocfs2_set_bit); | |
2420 | } | |
2421 | ||
2422 | /* | |
2423 | * Give never-used clusters back to the global bitmap. We don't need | |
2424 | * to protect these bits in the undo buffer. | |
2425 | */ | |
2426 | int ocfs2_release_clusters(handle_t *handle, | |
2427 | struct inode *bitmap_inode, | |
2428 | struct buffer_head *bitmap_bh, | |
2429 | u64 start_blk, | |
2430 | unsigned int num_clusters) | |
2431 | { | |
2432 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2433 | start_blk, num_clusters, | |
2434 | _ocfs2_clear_bit); | |
2435 | } | |
2436 | ||
ccd979bd MF |
2437 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) |
2438 | { | |
2439 | printk("Block Group:\n"); | |
2440 | printk("bg_signature: %s\n", bg->bg_signature); | |
2441 | printk("bg_size: %u\n", bg->bg_size); | |
2442 | printk("bg_bits: %u\n", bg->bg_bits); | |
2443 | printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); | |
2444 | printk("bg_chain: %u\n", bg->bg_chain); | |
2445 | printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); | |
b0697053 MF |
2446 | printk("bg_next_group: %llu\n", |
2447 | (unsigned long long)bg->bg_next_group); | |
2448 | printk("bg_parent_dinode: %llu\n", | |
2449 | (unsigned long long)bg->bg_parent_dinode); | |
2450 | printk("bg_blkno: %llu\n", | |
2451 | (unsigned long long)bg->bg_blkno); | |
ccd979bd MF |
2452 | } |
2453 | ||
2454 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) | |
2455 | { | |
2456 | int i; | |
2457 | ||
b0697053 | 2458 | printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); |
ccd979bd | 2459 | printk("i_signature: %s\n", fe->i_signature); |
b0697053 MF |
2460 | printk("i_size: %llu\n", |
2461 | (unsigned long long)fe->i_size); | |
ccd979bd MF |
2462 | printk("i_clusters: %u\n", fe->i_clusters); |
2463 | printk("i_generation: %u\n", | |
2464 | le32_to_cpu(fe->i_generation)); | |
2465 | printk("id1.bitmap1.i_used: %u\n", | |
2466 | le32_to_cpu(fe->id1.bitmap1.i_used)); | |
2467 | printk("id1.bitmap1.i_total: %u\n", | |
2468 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
2469 | printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); | |
2470 | printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); | |
2471 | printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); | |
2472 | printk("id2.i_chain.cl_next_free_rec: %u\n", | |
2473 | fe->id2.i_chain.cl_next_free_rec); | |
2474 | for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { | |
2475 | printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, | |
2476 | fe->id2.i_chain.cl_recs[i].c_free); | |
2477 | printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, | |
2478 | fe->id2.i_chain.cl_recs[i].c_total); | |
b0697053 MF |
2479 | printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, |
2480 | (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); | |
ccd979bd MF |
2481 | } |
2482 | } | |
e7d4cb6b TM |
2483 | |
2484 | /* | |
2485 | * For a given allocation, determine which allocators will need to be | |
2486 | * accessed, and lock them, reserving the appropriate number of bits. | |
2487 | * | |
2488 | * Sparse file systems call this from ocfs2_write_begin_nolock() | |
2489 | * and ocfs2_allocate_unwritten_extents(). | |
2490 | * | |
2491 | * File systems which don't support holes call this from | |
2492 | * ocfs2_extend_allocation(). | |
2493 | */ | |
f99b9b7c JB |
2494 | int ocfs2_lock_allocators(struct inode *inode, |
2495 | struct ocfs2_extent_tree *et, | |
e7d4cb6b TM |
2496 | u32 clusters_to_add, u32 extents_to_split, |
2497 | struct ocfs2_alloc_context **data_ac, | |
f99b9b7c | 2498 | struct ocfs2_alloc_context **meta_ac) |
e7d4cb6b TM |
2499 | { |
2500 | int ret = 0, num_free_extents; | |
2501 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; | |
2502 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2503 | ||
2504 | *meta_ac = NULL; | |
2505 | if (data_ac) | |
2506 | *data_ac = NULL; | |
2507 | ||
2508 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); | |
2509 | ||
3d03a305 | 2510 | num_free_extents = ocfs2_num_free_extents(osb, et); |
e7d4cb6b TM |
2511 | if (num_free_extents < 0) { |
2512 | ret = num_free_extents; | |
2513 | mlog_errno(ret); | |
2514 | goto out; | |
2515 | } | |
2516 | ||
2517 | /* | |
2518 | * Sparse allocation file systems need to be more conservative | |
2519 | * with reserving room for expansion - the actual allocation | |
2520 | * happens while we've got a journal handle open so re-taking | |
2521 | * a cluster lock (because we ran out of room for another | |
2522 | * extent) will violate ordering rules. | |
2523 | * | |
2524 | * Most of the time we'll only be seeing this 1 cluster at a time | |
2525 | * anyway. | |
2526 | * | |
2527 | * Always lock for any unwritten extents - we might want to | |
2528 | * add blocks during a split. | |
2529 | */ | |
2530 | if (!num_free_extents || | |
2531 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { | |
f99b9b7c | 2532 | ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); |
e7d4cb6b TM |
2533 | if (ret < 0) { |
2534 | if (ret != -ENOSPC) | |
2535 | mlog_errno(ret); | |
2536 | goto out; | |
2537 | } | |
2538 | } | |
2539 | ||
2540 | if (clusters_to_add == 0) | |
2541 | goto out; | |
2542 | ||
2543 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); | |
2544 | if (ret < 0) { | |
2545 | if (ret != -ENOSPC) | |
2546 | mlog_errno(ret); | |
2547 | goto out; | |
2548 | } | |
2549 | ||
2550 | out: | |
2551 | if (ret) { | |
2552 | if (*meta_ac) { | |
2553 | ocfs2_free_alloc_context(*meta_ac); | |
2554 | *meta_ac = NULL; | |
2555 | } | |
2556 | ||
2557 | /* | |
2558 | * We cannot have an error and a non null *data_ac. | |
2559 | */ | |
2560 | } | |
2561 | ||
2562 | return ret; | |
2563 | } | |
6ca497a8 | 2564 | |
2565 | /* | |
2566 | * Read the inode specified by blkno to get suballoc_slot and | |
2567 | * suballoc_bit. | |
2568 | */ | |
2569 | static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, | |
2570 | u16 *suballoc_slot, u16 *suballoc_bit) | |
2571 | { | |
2572 | int status; | |
2573 | struct buffer_head *inode_bh = NULL; | |
2574 | struct ocfs2_dinode *inode_fe; | |
2575 | ||
5b09b507 | 2576 | mlog_entry("blkno: %llu\n", (unsigned long long)blkno); |
6ca497a8 | 2577 | |
2578 | /* dirty read disk */ | |
2579 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); | |
2580 | if (status < 0) { | |
5b09b507 JB |
2581 | mlog(ML_ERROR, "read block %llu failed %d\n", |
2582 | (unsigned long long)blkno, status); | |
6ca497a8 | 2583 | goto bail; |
2584 | } | |
2585 | ||
2586 | inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; | |
2587 | if (!OCFS2_IS_VALID_DINODE(inode_fe)) { | |
5b09b507 JB |
2588 | mlog(ML_ERROR, "invalid inode %llu requested\n", |
2589 | (unsigned long long)blkno); | |
6ca497a8 | 2590 | status = -EINVAL; |
2591 | goto bail; | |
2592 | } | |
2593 | ||
0fba8137 | 2594 | if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && |
6ca497a8 | 2595 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { |
2596 | mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", | |
5b09b507 JB |
2597 | (unsigned long long)blkno, |
2598 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); | |
6ca497a8 | 2599 | status = -EINVAL; |
2600 | goto bail; | |
2601 | } | |
2602 | ||
2603 | if (suballoc_slot) | |
2604 | *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); | |
2605 | if (suballoc_bit) | |
2606 | *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); | |
2607 | ||
2608 | bail: | |
2609 | brelse(inode_bh); | |
2610 | ||
2611 | mlog_exit(status); | |
2612 | return status; | |
2613 | } | |
2614 | ||
2615 | /* | |
2616 | * test whether bit is SET in allocator bitmap or not. on success, 0 | |
2617 | * is returned and *res is 1 for SET; 0 otherwise. when fails, errno | |
2618 | * is returned and *res is meaningless. Call this after you have | |
2619 | * cluster locked against suballoc, or you may get a result based on | |
2620 | * non-up2date contents | |
2621 | */ | |
2622 | static int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, | |
2623 | struct inode *suballoc, | |
2624 | struct buffer_head *alloc_bh, u64 blkno, | |
2625 | u16 bit, int *res) | |
2626 | { | |
abf1b3cb | 2627 | struct ocfs2_dinode *alloc_di; |
6ca497a8 | 2628 | struct ocfs2_group_desc *group; |
2629 | struct buffer_head *group_bh = NULL; | |
2630 | u64 bg_blkno; | |
2631 | int status; | |
2632 | ||
5b09b507 JB |
2633 | mlog_entry("blkno: %llu bit: %u\n", (unsigned long long)blkno, |
2634 | (unsigned int)bit); | |
6ca497a8 | 2635 | |
abf1b3cb TM |
2636 | alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data; |
2637 | if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) { | |
6ca497a8 | 2638 | mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", |
2639 | (unsigned int)bit, | |
abf1b3cb | 2640 | ocfs2_bits_per_group(&alloc_di->id2.i_chain)); |
6ca497a8 | 2641 | status = -EINVAL; |
2642 | goto bail; | |
2643 | } | |
2644 | ||
abf1b3cb TM |
2645 | if (alloc_di->i_suballoc_loc) |
2646 | bg_blkno = le64_to_cpu(alloc_di->i_suballoc_loc); | |
2647 | else | |
2648 | bg_blkno = ocfs2_which_suballoc_group(blkno, bit); | |
2649 | status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno, | |
6ca497a8 | 2650 | &group_bh); |
2651 | if (status < 0) { | |
5b09b507 JB |
2652 | mlog(ML_ERROR, "read group %llu failed %d\n", |
2653 | (unsigned long long)bg_blkno, status); | |
6ca497a8 | 2654 | goto bail; |
2655 | } | |
2656 | ||
2657 | group = (struct ocfs2_group_desc *) group_bh->b_data; | |
2658 | *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); | |
2659 | ||
2660 | bail: | |
2661 | brelse(group_bh); | |
2662 | ||
2663 | mlog_exit(status); | |
2664 | return status; | |
2665 | } | |
2666 | ||
2667 | /* | |
2668 | * Test if the bit representing this inode (blkno) is set in the | |
2669 | * suballocator. | |
2670 | * | |
2671 | * On success, 0 is returned and *res is 1 for SET; 0 otherwise. | |
2672 | * | |
2673 | * In the event of failure, a negative value is returned and *res is | |
2674 | * meaningless. | |
2675 | * | |
2676 | * Callers must make sure to hold nfs_sync_lock to prevent | |
2677 | * ocfs2_delete_inode() on another node from accessing the same | |
2678 | * suballocator concurrently. | |
2679 | */ | |
2680 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) | |
2681 | { | |
2682 | int status; | |
2683 | u16 suballoc_bit = 0, suballoc_slot = 0; | |
2684 | struct inode *inode_alloc_inode; | |
2685 | struct buffer_head *alloc_bh = NULL; | |
2686 | ||
5b09b507 | 2687 | mlog_entry("blkno: %llu", (unsigned long long)blkno); |
6ca497a8 | 2688 | |
2689 | status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, | |
2690 | &suballoc_bit); | |
2691 | if (status < 0) { | |
2692 | mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); | |
2693 | goto bail; | |
2694 | } | |
2695 | ||
2696 | inode_alloc_inode = | |
2697 | ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, | |
2698 | suballoc_slot); | |
2699 | if (!inode_alloc_inode) { | |
2700 | /* the error code could be inaccurate, but we are not able to | |
2701 | * get the correct one. */ | |
2702 | status = -EINVAL; | |
2703 | mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", | |
2704 | (u32)suballoc_slot); | |
2705 | goto bail; | |
2706 | } | |
2707 | ||
2708 | mutex_lock(&inode_alloc_inode->i_mutex); | |
2709 | status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); | |
2710 | if (status < 0) { | |
2711 | mutex_unlock(&inode_alloc_inode->i_mutex); | |
2712 | mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", | |
2713 | (u32)suballoc_slot, status); | |
2714 | goto bail; | |
2715 | } | |
2716 | ||
2717 | status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, | |
2718 | blkno, suballoc_bit, res); | |
2719 | if (status < 0) | |
2720 | mlog(ML_ERROR, "test suballoc bit failed %d\n", status); | |
2721 | ||
2722 | ocfs2_inode_unlock(inode_alloc_inode, 0); | |
2723 | mutex_unlock(&inode_alloc_inode->i_mutex); | |
2724 | ||
2725 | iput(inode_alloc_inode); | |
2726 | brelse(alloc_bh); | |
2727 | bail: | |
2728 | mlog_exit(status); | |
2729 | return status; | |
2730 | } |