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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 | ||
ccd979bd MF |
32 | #include <cluster/masklog.h> |
33 | ||
34 | #include "ocfs2.h" | |
35 | ||
36 | #include "alloc.h" | |
d6b32bbb | 37 | #include "blockcheck.h" |
ccd979bd MF |
38 | #include "dlmglue.h" |
39 | #include "inode.h" | |
40 | #include "journal.h" | |
41 | #include "localalloc.h" | |
42 | #include "suballoc.h" | |
43 | #include "super.h" | |
44 | #include "sysfile.h" | |
45 | #include "uptodate.h" | |
2f73e135 | 46 | #include "ocfs2_trace.h" |
ccd979bd MF |
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. */ | |
e49e2767 MF |
60 | u64 sr_bg_stable_blkno; /* |
61 | * Doesn't change, always | |
62 | * set to target block | |
63 | * group descriptor | |
64 | * block. | |
65 | */ | |
ba206635 | 66 | u64 sr_blkno; /* The first allocated block */ |
7d1fe093 JB |
67 | unsigned int sr_bit_offset; /* The bit in the bg */ |
68 | unsigned int sr_bits; /* How many bits we claimed */ | |
69 | }; | |
70 | ||
b2b6ebf5 MF |
71 | static u64 ocfs2_group_from_res(struct ocfs2_suballoc_result *res) |
72 | { | |
73 | if (res->sr_blkno == 0) | |
74 | return 0; | |
75 | ||
76 | if (res->sr_bg_blkno) | |
77 | return res->sr_bg_blkno; | |
78 | ||
79 | return ocfs2_which_suballoc_group(res->sr_blkno, res->sr_bit_offset); | |
80 | } | |
81 | ||
ccd979bd MF |
82 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg); |
83 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe); | |
84 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); | |
1fabe148 | 85 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
86 | struct inode *alloc_inode, |
87 | struct buffer_head *bg_bh, | |
88 | u64 group_blkno, | |
798db35f | 89 | unsigned int group_clusters, |
ccd979bd MF |
90 | u16 my_chain, |
91 | struct ocfs2_chain_list *cl); | |
92 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
93 | struct inode *alloc_inode, | |
1187c968 | 94 | struct buffer_head *bh, |
60ca81e8 | 95 | u64 max_block, |
feb473a6 | 96 | u64 *last_alloc_group, |
60ca81e8 | 97 | int flags); |
ccd979bd | 98 | |
ccd979bd MF |
99 | static int ocfs2_cluster_group_search(struct inode *inode, |
100 | struct buffer_head *group_bh, | |
101 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 102 | u64 max_block, |
7d1fe093 | 103 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
104 | static int ocfs2_block_group_search(struct inode *inode, |
105 | struct buffer_head *group_bh, | |
106 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 107 | u64 max_block, |
7d1fe093 | 108 | struct ocfs2_suballoc_result *res); |
aa8f8e93 | 109 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 110 | handle_t *handle, |
ccd979bd MF |
111 | u32 bits_wanted, |
112 | u32 min_bits, | |
7d1fe093 | 113 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
114 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, |
115 | int nr); | |
1fabe148 | 116 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
117 | struct inode *alloc_inode, |
118 | struct buffer_head *fe_bh, | |
119 | struct buffer_head *bg_bh, | |
120 | struct buffer_head *prev_bg_bh, | |
121 | u16 chain); | |
122 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
123 | u32 wanted); | |
ccd979bd MF |
124 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
125 | u64 bg_blkno, | |
126 | u16 bg_bit_off); | |
ccd979bd MF |
127 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
128 | u64 data_blkno, | |
129 | u64 *bg_blkno, | |
130 | u16 *bg_bit_off); | |
1187c968 JB |
131 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
132 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 133 | int flags, |
1187c968 | 134 | struct ocfs2_alloc_context **ac); |
ccd979bd | 135 | |
9c7af40b | 136 | void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) |
ccd979bd | 137 | { |
da5cbf2f MF |
138 | struct inode *inode = ac->ac_inode; |
139 | ||
140 | if (inode) { | |
141 | if (ac->ac_which != OCFS2_AC_USE_LOCAL) | |
e63aecb6 | 142 | ocfs2_inode_unlock(inode, 1); |
da5cbf2f MF |
143 | |
144 | mutex_unlock(&inode->i_mutex); | |
145 | ||
146 | iput(inode); | |
4d0ddb2c | 147 | ac->ac_inode = NULL; |
da5cbf2f | 148 | } |
a81cb88b MF |
149 | brelse(ac->ac_bh); |
150 | ac->ac_bh = NULL; | |
e3b4a97d | 151 | ac->ac_resv = NULL; |
e49e2767 MF |
152 | if (ac->ac_find_loc_priv) { |
153 | kfree(ac->ac_find_loc_priv); | |
154 | ac->ac_find_loc_priv = NULL; | |
155 | } | |
4d0ddb2c TM |
156 | } |
157 | ||
158 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) | |
159 | { | |
160 | ocfs2_free_ac_resource(ac); | |
ccd979bd MF |
161 | kfree(ac); |
162 | } | |
163 | ||
164 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) | |
165 | { | |
166 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); | |
167 | } | |
168 | ||
57e3e797 JB |
169 | #define do_error(fmt, ...) \ |
170 | do{ \ | |
78c37eb0 | 171 | if (resize) \ |
57e3e797 JB |
172 | mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \ |
173 | else \ | |
174 | ocfs2_error(sb, fmt, ##__VA_ARGS__); \ | |
175 | } while (0) | |
176 | ||
970e4936 JB |
177 | static int ocfs2_validate_gd_self(struct super_block *sb, |
178 | struct buffer_head *bh, | |
78c37eb0 | 179 | int resize) |
970e4936 JB |
180 | { |
181 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
182 | ||
7bf72ede | 183 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { |
68f64d47 JB |
184 | do_error("Group descriptor #%llu has bad signature %.*s", |
185 | (unsigned long long)bh->b_blocknr, 7, | |
57e3e797 JB |
186 | gd->bg_signature); |
187 | return -EINVAL; | |
7bf72ede MF |
188 | } |
189 | ||
68f64d47 JB |
190 | if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { |
191 | do_error("Group descriptor #%llu has an invalid bg_blkno " | |
192 | "of %llu", | |
193 | (unsigned long long)bh->b_blocknr, | |
194 | (unsigned long long)le64_to_cpu(gd->bg_blkno)); | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { | |
199 | do_error("Group descriptor #%llu has an invalid " | |
200 | "fs_generation of #%u", | |
201 | (unsigned long long)bh->b_blocknr, | |
202 | le32_to_cpu(gd->bg_generation)); | |
203 | return -EINVAL; | |
204 | } | |
205 | ||
970e4936 JB |
206 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { |
207 | do_error("Group descriptor #%llu has bit count %u but " | |
208 | "claims that %u are free", | |
209 | (unsigned long long)bh->b_blocknr, | |
210 | le16_to_cpu(gd->bg_bits), | |
211 | le16_to_cpu(gd->bg_free_bits_count)); | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
215 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { | |
216 | do_error("Group descriptor #%llu has bit count %u but " | |
217 | "max bitmap bits of %u", | |
218 | (unsigned long long)bh->b_blocknr, | |
219 | le16_to_cpu(gd->bg_bits), | |
220 | 8 * le16_to_cpu(gd->bg_size)); | |
221 | return -EINVAL; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int ocfs2_validate_gd_parent(struct super_block *sb, | |
228 | struct ocfs2_dinode *di, | |
229 | struct buffer_head *bh, | |
78c37eb0 | 230 | int resize) |
970e4936 JB |
231 | { |
232 | unsigned int max_bits; | |
233 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
234 | ||
7bf72ede | 235 | if (di->i_blkno != gd->bg_parent_dinode) { |
68f64d47 | 236 | do_error("Group descriptor #%llu has bad parent " |
57e3e797 | 237 | "pointer (%llu, expected %llu)", |
68f64d47 | 238 | (unsigned long long)bh->b_blocknr, |
57e3e797 JB |
239 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), |
240 | (unsigned long long)le64_to_cpu(di->i_blkno)); | |
241 | return -EINVAL; | |
7bf72ede MF |
242 | } |
243 | ||
244 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); | |
245 | if (le16_to_cpu(gd->bg_bits) > max_bits) { | |
68f64d47 JB |
246 | do_error("Group descriptor #%llu has bit count of %u", |
247 | (unsigned long long)bh->b_blocknr, | |
57e3e797 JB |
248 | le16_to_cpu(gd->bg_bits)); |
249 | return -EINVAL; | |
7bf72ede MF |
250 | } |
251 | ||
78c37eb0 TM |
252 | /* In resize, we may meet the case bg_chain == cl_next_free_rec. */ |
253 | if ((le16_to_cpu(gd->bg_chain) > | |
254 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) || | |
255 | ((le16_to_cpu(gd->bg_chain) == | |
256 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) && !resize)) { | |
68f64d47 JB |
257 | do_error("Group descriptor #%llu has bad chain %u", |
258 | (unsigned long long)bh->b_blocknr, | |
57e3e797 JB |
259 | le16_to_cpu(gd->bg_chain)); |
260 | return -EINVAL; | |
7bf72ede MF |
261 | } |
262 | ||
970e4936 JB |
263 | return 0; |
264 | } | |
7bf72ede | 265 | |
57e3e797 | 266 | #undef do_error |
7bf72ede | 267 | |
970e4936 JB |
268 | /* |
269 | * This version only prints errors. It does not fail the filesystem, and | |
270 | * exists only for resize. | |
271 | */ | |
272 | int ocfs2_check_group_descriptor(struct super_block *sb, | |
273 | struct ocfs2_dinode *di, | |
274 | struct buffer_head *bh) | |
275 | { | |
276 | int rc; | |
d6b32bbb JB |
277 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
278 | ||
279 | BUG_ON(!buffer_uptodate(bh)); | |
970e4936 | 280 | |
d6b32bbb JB |
281 | /* |
282 | * If the ecc fails, we return the error but otherwise | |
283 | * leave the filesystem running. We know any error is | |
284 | * local to this block. | |
285 | */ | |
286 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
13723d00 JB |
287 | if (rc) { |
288 | mlog(ML_ERROR, | |
289 | "Checksum failed for group descriptor %llu\n", | |
290 | (unsigned long long)bh->b_blocknr); | |
291 | } else | |
d6b32bbb | 292 | rc = ocfs2_validate_gd_self(sb, bh, 1); |
970e4936 JB |
293 | if (!rc) |
294 | rc = ocfs2_validate_gd_parent(sb, di, bh, 1); | |
295 | ||
296 | return rc; | |
297 | } | |
298 | ||
299 | static int ocfs2_validate_group_descriptor(struct super_block *sb, | |
300 | struct buffer_head *bh) | |
301 | { | |
d6b32bbb JB |
302 | int rc; |
303 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
304 | ||
2f73e135 TM |
305 | trace_ocfs2_validate_group_descriptor( |
306 | (unsigned long long)bh->b_blocknr); | |
970e4936 | 307 | |
d6b32bbb JB |
308 | BUG_ON(!buffer_uptodate(bh)); |
309 | ||
310 | /* | |
311 | * If the ecc fails, we return the error but otherwise | |
312 | * leave the filesystem running. We know any error is | |
313 | * local to this block. | |
314 | */ | |
315 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
316 | if (rc) | |
317 | return rc; | |
318 | ||
319 | /* | |
320 | * Errors after here are fatal. | |
321 | */ | |
322 | ||
970e4936 | 323 | return ocfs2_validate_gd_self(sb, bh, 0); |
7bf72ede MF |
324 | } |
325 | ||
68f64d47 JB |
326 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, |
327 | u64 gd_blkno, struct buffer_head **bh) | |
328 | { | |
329 | int rc; | |
330 | struct buffer_head *tmp = *bh; | |
331 | ||
8cb471e8 | 332 | rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, |
970e4936 | 333 | ocfs2_validate_group_descriptor); |
68f64d47 JB |
334 | if (rc) |
335 | goto out; | |
336 | ||
970e4936 | 337 | rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); |
68f64d47 JB |
338 | if (rc) { |
339 | brelse(tmp); | |
340 | goto out; | |
341 | } | |
342 | ||
343 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
344 | if (!*bh) | |
345 | *bh = tmp; | |
346 | ||
347 | out: | |
348 | return rc; | |
349 | } | |
350 | ||
798db35f JB |
351 | static void ocfs2_bg_discontig_add_extent(struct ocfs2_super *osb, |
352 | struct ocfs2_group_desc *bg, | |
353 | struct ocfs2_chain_list *cl, | |
47dea423 | 354 | u64 p_blkno, unsigned int clusters) |
798db35f JB |
355 | { |
356 | struct ocfs2_extent_list *el = &bg->bg_list; | |
357 | struct ocfs2_extent_rec *rec; | |
358 | ||
4711954e | 359 | BUG_ON(!ocfs2_supports_discontig_bg(osb)); |
798db35f JB |
360 | if (!el->l_next_free_rec) |
361 | el->l_count = cpu_to_le16(ocfs2_extent_recs_per_gd(osb->sb)); | |
362 | rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec)]; | |
4711954e | 363 | rec->e_blkno = cpu_to_le64(p_blkno); |
798db35f JB |
364 | rec->e_cpos = cpu_to_le32(le16_to_cpu(bg->bg_bits) / |
365 | le16_to_cpu(cl->cl_bpc)); | |
47dea423 | 366 | rec->e_leaf_clusters = cpu_to_le16(clusters); |
798db35f | 367 | le16_add_cpu(&bg->bg_bits, clusters * le16_to_cpu(cl->cl_bpc)); |
4711954e TM |
368 | le16_add_cpu(&bg->bg_free_bits_count, |
369 | clusters * le16_to_cpu(cl->cl_bpc)); | |
798db35f JB |
370 | le16_add_cpu(&el->l_next_free_rec, 1); |
371 | } | |
372 | ||
1fabe148 | 373 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
374 | struct inode *alloc_inode, |
375 | struct buffer_head *bg_bh, | |
376 | u64 group_blkno, | |
798db35f | 377 | unsigned int group_clusters, |
ccd979bd MF |
378 | u16 my_chain, |
379 | struct ocfs2_chain_list *cl) | |
380 | { | |
381 | int status = 0; | |
798db35f | 382 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); |
ccd979bd MF |
383 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
384 | struct super_block * sb = alloc_inode->i_sb; | |
385 | ||
ccd979bd | 386 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { |
b0697053 MF |
387 | ocfs2_error(alloc_inode->i_sb, "group block (%llu) != " |
388 | "b_blocknr (%llu)", | |
389 | (unsigned long long)group_blkno, | |
ccd979bd MF |
390 | (unsigned long long) bg_bh->b_blocknr); |
391 | status = -EIO; | |
392 | goto bail; | |
393 | } | |
394 | ||
13723d00 | 395 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 396 | INODE_CACHE(alloc_inode), |
13723d00 JB |
397 | bg_bh, |
398 | OCFS2_JOURNAL_ACCESS_CREATE); | |
ccd979bd MF |
399 | if (status < 0) { |
400 | mlog_errno(status); | |
401 | goto bail; | |
402 | } | |
403 | ||
404 | memset(bg, 0, sb->s_blocksize); | |
405 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); | |
406 | bg->bg_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation); | |
8571882c TM |
407 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, |
408 | osb->s_feature_incompat)); | |
ccd979bd MF |
409 | bg->bg_chain = cpu_to_le16(my_chain); |
410 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; | |
411 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); | |
412 | bg->bg_blkno = cpu_to_le64(group_blkno); | |
798db35f JB |
413 | if (group_clusters == le16_to_cpu(cl->cl_cpg)) |
414 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); | |
415 | else | |
4711954e | 416 | ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, |
798db35f JB |
417 | group_clusters); |
418 | ||
ccd979bd MF |
419 | /* set the 1st bit in the bitmap to account for the descriptor block */ |
420 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); | |
421 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); | |
422 | ||
ec20cec7 | 423 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd MF |
424 | |
425 | /* There is no need to zero out or otherwise initialize the | |
426 | * other blocks in a group - All valid FS metadata in a block | |
427 | * group stores the superblock fs_generation value at | |
428 | * allocation time. */ | |
429 | ||
430 | bail: | |
c1e8d35e TM |
431 | if (status) |
432 | mlog_errno(status); | |
ccd979bd MF |
433 | return status; |
434 | } | |
435 | ||
436 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) | |
437 | { | |
438 | u16 curr, best; | |
439 | ||
440 | best = curr = 0; | |
441 | while (curr < le16_to_cpu(cl->cl_count)) { | |
442 | if (le32_to_cpu(cl->cl_recs[best].c_total) > | |
443 | le32_to_cpu(cl->cl_recs[curr].c_total)) | |
444 | best = curr; | |
445 | curr++; | |
446 | } | |
447 | return best; | |
448 | } | |
449 | ||
798db35f JB |
450 | static struct buffer_head * |
451 | ocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, | |
452 | struct inode *alloc_inode, | |
453 | struct ocfs2_alloc_context *ac, | |
454 | struct ocfs2_chain_list *cl) | |
455 | { | |
456 | int status; | |
457 | u32 bit_off, num_bits; | |
458 | u64 bg_blkno; | |
459 | struct buffer_head *bg_bh; | |
460 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
461 | ||
1ed9b777 | 462 | status = ocfs2_claim_clusters(handle, ac, |
798db35f JB |
463 | le16_to_cpu(cl->cl_cpg), &bit_off, |
464 | &num_bits); | |
465 | if (status < 0) { | |
466 | if (status != -ENOSPC) | |
467 | mlog_errno(status); | |
468 | goto bail; | |
469 | } | |
470 | ||
471 | /* setup the group */ | |
472 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
2f73e135 TM |
473 | trace_ocfs2_block_group_alloc_contig( |
474 | (unsigned long long)bg_blkno, alloc_rec); | |
798db35f JB |
475 | |
476 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
477 | if (!bg_bh) { | |
7391a294 | 478 | status = -ENOMEM; |
798db35f JB |
479 | mlog_errno(status); |
480 | goto bail; | |
481 | } | |
482 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
483 | ||
484 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
485 | bg_blkno, num_bits, alloc_rec, cl); | |
486 | if (status < 0) { | |
487 | brelse(bg_bh); | |
488 | mlog_errno(status); | |
489 | } | |
490 | ||
491 | bail: | |
492 | return status ? ERR_PTR(status) : bg_bh; | |
493 | } | |
494 | ||
495 | static int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, | |
496 | handle_t *handle, | |
497 | struct ocfs2_alloc_context *ac, | |
498 | unsigned int min_bits, | |
499 | u32 *bit_off, u32 *num_bits) | |
500 | { | |
18d3a98f | 501 | int status = 0; |
798db35f JB |
502 | |
503 | while (min_bits) { | |
1ed9b777 | 504 | status = ocfs2_claim_clusters(handle, ac, min_bits, |
798db35f JB |
505 | bit_off, num_bits); |
506 | if (status != -ENOSPC) | |
507 | break; | |
508 | ||
509 | min_bits >>= 1; | |
510 | } | |
511 | ||
512 | return status; | |
513 | } | |
514 | ||
515 | static int ocfs2_block_group_grow_discontig(handle_t *handle, | |
516 | struct inode *alloc_inode, | |
517 | struct buffer_head *bg_bh, | |
518 | struct ocfs2_alloc_context *ac, | |
519 | struct ocfs2_chain_list *cl, | |
520 | unsigned int min_bits) | |
521 | { | |
522 | int status; | |
523 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
524 | struct ocfs2_group_desc *bg = | |
525 | (struct ocfs2_group_desc *)bg_bh->b_data; | |
4711954e TM |
526 | unsigned int needed = le16_to_cpu(cl->cl_cpg) - |
527 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
528 | u32 p_cpos, clusters; |
529 | u64 p_blkno; | |
530 | struct ocfs2_extent_list *el = &bg->bg_list; | |
531 | ||
532 | status = ocfs2_journal_access_gd(handle, | |
533 | INODE_CACHE(alloc_inode), | |
534 | bg_bh, | |
535 | OCFS2_JOURNAL_ACCESS_CREATE); | |
536 | if (status < 0) { | |
537 | mlog_errno(status); | |
538 | goto bail; | |
539 | } | |
540 | ||
541 | while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < | |
542 | le16_to_cpu(el->l_count))) { | |
798db35f JB |
543 | if (min_bits > needed) |
544 | min_bits = needed; | |
545 | status = ocfs2_block_group_claim_bits(osb, handle, ac, | |
546 | min_bits, &p_cpos, | |
547 | &clusters); | |
548 | if (status < 0) { | |
549 | if (status != -ENOSPC) | |
550 | mlog_errno(status); | |
551 | goto bail; | |
552 | } | |
553 | p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); | |
554 | ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, | |
555 | clusters); | |
556 | ||
557 | min_bits = clusters; | |
4711954e TM |
558 | needed = le16_to_cpu(cl->cl_cpg) - |
559 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
560 | } |
561 | ||
562 | if (needed > 0) { | |
4711954e TM |
563 | /* |
564 | * We have used up all the extent rec but can't fill up | |
565 | * the cpg. So bail out. | |
566 | */ | |
567 | status = -ENOSPC; | |
568 | goto bail; | |
798db35f JB |
569 | } |
570 | ||
571 | ocfs2_journal_dirty(handle, bg_bh); | |
572 | ||
573 | bail: | |
574 | return status; | |
575 | } | |
576 | ||
8b06bc59 JB |
577 | static void ocfs2_bg_alloc_cleanup(handle_t *handle, |
578 | struct ocfs2_alloc_context *cluster_ac, | |
579 | struct inode *alloc_inode, | |
580 | struct buffer_head *bg_bh) | |
798db35f | 581 | { |
8b06bc59 | 582 | int i, ret; |
798db35f JB |
583 | struct ocfs2_group_desc *bg; |
584 | struct ocfs2_extent_list *el; | |
585 | struct ocfs2_extent_rec *rec; | |
586 | ||
587 | if (!bg_bh) | |
588 | return; | |
589 | ||
590 | bg = (struct ocfs2_group_desc *)bg_bh->b_data; | |
591 | el = &bg->bg_list; | |
592 | for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { | |
593 | rec = &el->l_recs[i]; | |
8b06bc59 JB |
594 | ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, |
595 | cluster_ac->ac_bh, | |
596 | le64_to_cpu(rec->e_blkno), | |
72094e43 | 597 | le16_to_cpu(rec->e_leaf_clusters)); |
8b06bc59 JB |
598 | if (ret) |
599 | mlog_errno(ret); | |
600 | /* Try all the clusters to free */ | |
798db35f JB |
601 | } |
602 | ||
603 | ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); | |
604 | brelse(bg_bh); | |
605 | } | |
606 | ||
607 | static struct buffer_head * | |
608 | ocfs2_block_group_alloc_discontig(handle_t *handle, | |
609 | struct inode *alloc_inode, | |
610 | struct ocfs2_alloc_context *ac, | |
8b06bc59 | 611 | struct ocfs2_chain_list *cl) |
798db35f JB |
612 | { |
613 | int status; | |
614 | u32 bit_off, num_bits; | |
615 | u64 bg_blkno; | |
616 | unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; | |
617 | struct buffer_head *bg_bh = NULL; | |
618 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
619 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
620 | ||
4711954e | 621 | if (!ocfs2_supports_discontig_bg(osb)) { |
798db35f JB |
622 | status = -ENOSPC; |
623 | goto bail; | |
624 | } | |
625 | ||
8b06bc59 JB |
626 | status = ocfs2_extend_trans(handle, |
627 | ocfs2_calc_bg_discontig_credits(osb->sb)); | |
628 | if (status) { | |
629 | mlog_errno(status); | |
630 | goto bail; | |
631 | } | |
632 | ||
95ec0adf JB |
633 | /* |
634 | * We're going to be grabbing from multiple cluster groups. | |
635 | * We don't have enough credits to relink them all, and the | |
636 | * cluster groups will be staying in cache for the duration of | |
637 | * this operation. | |
638 | */ | |
309a85b6 | 639 | ac->ac_disable_chain_relink = 1; |
95ec0adf | 640 | |
798db35f JB |
641 | /* Claim the first region */ |
642 | status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, | |
643 | &bit_off, &num_bits); | |
644 | if (status < 0) { | |
645 | if (status != -ENOSPC) | |
646 | mlog_errno(status); | |
647 | goto bail; | |
648 | } | |
649 | min_bits = num_bits; | |
650 | ||
651 | /* setup the group */ | |
652 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
2f73e135 TM |
653 | trace_ocfs2_block_group_alloc_discontig( |
654 | (unsigned long long)bg_blkno, alloc_rec); | |
798db35f JB |
655 | |
656 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
657 | if (!bg_bh) { | |
7391a294 | 658 | status = -ENOMEM; |
798db35f JB |
659 | mlog_errno(status); |
660 | goto bail; | |
661 | } | |
662 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
663 | ||
664 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
665 | bg_blkno, num_bits, alloc_rec, cl); | |
666 | if (status < 0) { | |
667 | mlog_errno(status); | |
668 | goto bail; | |
669 | } | |
670 | ||
671 | status = ocfs2_block_group_grow_discontig(handle, alloc_inode, | |
672 | bg_bh, ac, cl, min_bits); | |
673 | if (status) | |
674 | mlog_errno(status); | |
675 | ||
676 | bail: | |
677 | if (status) | |
8b06bc59 | 678 | ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); |
798db35f JB |
679 | return status ? ERR_PTR(status) : bg_bh; |
680 | } | |
681 | ||
ccd979bd MF |
682 | /* |
683 | * We expect the block group allocator to already be locked. | |
684 | */ | |
685 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
686 | struct inode *alloc_inode, | |
1187c968 | 687 | struct buffer_head *bh, |
60ca81e8 | 688 | u64 max_block, |
feb473a6 | 689 | u64 *last_alloc_group, |
60ca81e8 | 690 | int flags) |
ccd979bd MF |
691 | { |
692 | int status, credits; | |
693 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; | |
694 | struct ocfs2_chain_list *cl; | |
695 | struct ocfs2_alloc_context *ac = NULL; | |
1fabe148 | 696 | handle_t *handle = NULL; |
4711954e | 697 | u16 alloc_rec; |
ccd979bd MF |
698 | struct buffer_head *bg_bh = NULL; |
699 | struct ocfs2_group_desc *bg; | |
700 | ||
701 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); | |
702 | ||
ccd979bd | 703 | cl = &fe->id2.i_chain; |
1187c968 JB |
704 | status = ocfs2_reserve_clusters_with_limit(osb, |
705 | le16_to_cpu(cl->cl_cpg), | |
60ca81e8 | 706 | max_block, flags, &ac); |
ccd979bd MF |
707 | if (status < 0) { |
708 | if (status != -ENOSPC) | |
709 | mlog_errno(status); | |
710 | goto bail; | |
711 | } | |
712 | ||
713 | credits = ocfs2_calc_group_alloc_credits(osb->sb, | |
714 | le16_to_cpu(cl->cl_cpg)); | |
65eff9cc | 715 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
716 | if (IS_ERR(handle)) { |
717 | status = PTR_ERR(handle); | |
718 | handle = NULL; | |
719 | mlog_errno(status); | |
720 | goto bail; | |
721 | } | |
722 | ||
feb473a6 | 723 | if (last_alloc_group && *last_alloc_group != 0) { |
2f73e135 TM |
724 | trace_ocfs2_block_group_alloc( |
725 | (unsigned long long)*last_alloc_group); | |
feb473a6 TM |
726 | ac->ac_last_group = *last_alloc_group; |
727 | } | |
798db35f JB |
728 | |
729 | bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, | |
730 | ac, cl); | |
731 | if (IS_ERR(bg_bh) && (PTR_ERR(bg_bh) == -ENOSPC)) | |
732 | bg_bh = ocfs2_block_group_alloc_discontig(handle, | |
733 | alloc_inode, | |
8b06bc59 | 734 | ac, cl); |
798db35f JB |
735 | if (IS_ERR(bg_bh)) { |
736 | status = PTR_ERR(bg_bh); | |
737 | bg_bh = NULL; | |
ccd979bd MF |
738 | if (status != -ENOSPC) |
739 | mlog_errno(status); | |
740 | goto bail; | |
741 | } | |
ccd979bd MF |
742 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
743 | ||
0cf2f763 | 744 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
13723d00 | 745 | bh, OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
746 | if (status < 0) { |
747 | mlog_errno(status); | |
748 | goto bail; | |
749 | } | |
750 | ||
4711954e TM |
751 | alloc_rec = le16_to_cpu(bg->bg_chain); |
752 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, | |
ccd979bd | 753 | le16_to_cpu(bg->bg_free_bits_count)); |
4711954e | 754 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, |
798db35f | 755 | le16_to_cpu(bg->bg_bits)); |
0a463b74 | 756 | cl->cl_recs[alloc_rec].c_blkno = bg->bg_blkno; |
ccd979bd MF |
757 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) |
758 | le16_add_cpu(&cl->cl_next_free_rec, 1); | |
759 | ||
760 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - | |
761 | le16_to_cpu(bg->bg_free_bits_count)); | |
762 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); | |
763 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); | |
764 | ||
ec20cec7 | 765 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
766 | |
767 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); | |
768 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
769 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, | |
770 | le32_to_cpu(fe->i_clusters))); | |
771 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); | |
772 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); | |
8110b073 | 773 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
6fdb702d | 774 | ocfs2_update_inode_fsync_trans(handle, alloc_inode, 0); |
ccd979bd MF |
775 | |
776 | status = 0; | |
feb473a6 TM |
777 | |
778 | /* save the new last alloc group so that the caller can cache it. */ | |
779 | if (last_alloc_group) | |
780 | *last_alloc_group = ac->ac_last_group; | |
781 | ||
ccd979bd MF |
782 | bail: |
783 | if (handle) | |
02dc1af4 | 784 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
785 | |
786 | if (ac) | |
787 | ocfs2_free_alloc_context(ac); | |
788 | ||
a81cb88b | 789 | brelse(bg_bh); |
ccd979bd | 790 | |
c1e8d35e TM |
791 | if (status) |
792 | mlog_errno(status); | |
ccd979bd MF |
793 | return status; |
794 | } | |
795 | ||
796 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, | |
da5cbf2f MF |
797 | struct ocfs2_alloc_context *ac, |
798 | int type, | |
ffda89a3 | 799 | u32 slot, |
feb473a6 | 800 | u64 *last_alloc_group, |
60ca81e8 | 801 | int flags) |
ccd979bd MF |
802 | { |
803 | int status; | |
804 | u32 bits_wanted = ac->ac_bits_wanted; | |
da5cbf2f | 805 | struct inode *alloc_inode; |
ccd979bd | 806 | struct buffer_head *bh = NULL; |
ccd979bd MF |
807 | struct ocfs2_dinode *fe; |
808 | u32 free_bits; | |
809 | ||
da5cbf2f MF |
810 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
811 | if (!alloc_inode) { | |
812 | mlog_errno(-EINVAL); | |
813 | return -EINVAL; | |
814 | } | |
ccd979bd | 815 | |
da5cbf2f MF |
816 | mutex_lock(&alloc_inode->i_mutex); |
817 | ||
e63aecb6 | 818 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
ccd979bd | 819 | if (status < 0) { |
da5cbf2f MF |
820 | mutex_unlock(&alloc_inode->i_mutex); |
821 | iput(alloc_inode); | |
822 | ||
ccd979bd | 823 | mlog_errno(status); |
da5cbf2f | 824 | return status; |
ccd979bd MF |
825 | } |
826 | ||
da5cbf2f | 827 | ac->ac_inode = alloc_inode; |
a4a48911 | 828 | ac->ac_alloc_slot = slot; |
da5cbf2f | 829 | |
ccd979bd | 830 | fe = (struct ocfs2_dinode *) bh->b_data; |
10995aa2 JB |
831 | |
832 | /* The bh was validated by the inode read inside | |
833 | * ocfs2_inode_lock(). Any corruption is a code bug. */ | |
834 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
835 | ||
ccd979bd | 836 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { |
b0697053 MF |
837 | ocfs2_error(alloc_inode->i_sb, "Invalid chain allocator %llu", |
838 | (unsigned long long)le64_to_cpu(fe->i_blkno)); | |
ccd979bd MF |
839 | status = -EIO; |
840 | goto bail; | |
841 | } | |
842 | ||
843 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - | |
844 | le32_to_cpu(fe->id1.bitmap1.i_used); | |
845 | ||
846 | if (bits_wanted > free_bits) { | |
847 | /* cluster bitmap never grows */ | |
848 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { | |
2f73e135 TM |
849 | trace_ocfs2_reserve_suballoc_bits_nospc(bits_wanted, |
850 | free_bits); | |
ccd979bd MF |
851 | status = -ENOSPC; |
852 | goto bail; | |
853 | } | |
854 | ||
60ca81e8 | 855 | if (!(flags & ALLOC_NEW_GROUP)) { |
2f73e135 TM |
856 | trace_ocfs2_reserve_suballoc_bits_no_new_group( |
857 | slot, bits_wanted, free_bits); | |
ffda89a3 TM |
858 | status = -ENOSPC; |
859 | goto bail; | |
860 | } | |
861 | ||
1187c968 | 862 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh, |
feb473a6 TM |
863 | ac->ac_max_block, |
864 | last_alloc_group, flags); | |
ccd979bd MF |
865 | if (status < 0) { |
866 | if (status != -ENOSPC) | |
867 | mlog_errno(status); | |
868 | goto bail; | |
869 | } | |
870 | atomic_inc(&osb->alloc_stats.bg_extends); | |
871 | ||
872 | /* You should never ask for this much metadata */ | |
873 | BUG_ON(bits_wanted > | |
874 | (le32_to_cpu(fe->id1.bitmap1.i_total) | |
875 | - le32_to_cpu(fe->id1.bitmap1.i_used))); | |
876 | } | |
877 | ||
878 | get_bh(bh); | |
879 | ac->ac_bh = bh; | |
880 | bail: | |
a81cb88b | 881 | brelse(bh); |
ccd979bd | 882 | |
c1e8d35e TM |
883 | if (status) |
884 | mlog_errno(status); | |
ccd979bd MF |
885 | return status; |
886 | } | |
887 | ||
b89c5428 TY |
888 | static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
889 | { | |
890 | spin_lock(&osb->osb_lock); | |
891 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
892 | spin_unlock(&osb->osb_lock); | |
893 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
894 | } | |
895 | ||
896 | static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) | |
897 | { | |
898 | spin_lock(&osb->osb_lock); | |
899 | osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; | |
900 | spin_unlock(&osb->osb_lock); | |
901 | atomic_set(&osb->s_num_meta_stolen, 0); | |
902 | } | |
903 | ||
904 | void ocfs2_init_steal_slots(struct ocfs2_super *osb) | |
905 | { | |
906 | ocfs2_init_inode_steal_slot(osb); | |
907 | ocfs2_init_meta_steal_slot(osb); | |
908 | } | |
909 | ||
910 | static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) | |
911 | { | |
912 | spin_lock(&osb->osb_lock); | |
913 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
914 | osb->s_inode_steal_slot = slot; | |
915 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
916 | osb->s_meta_steal_slot = slot; | |
917 | spin_unlock(&osb->osb_lock); | |
918 | } | |
919 | ||
920 | static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) | |
921 | { | |
922 | int slot = OCFS2_INVALID_SLOT; | |
923 | ||
924 | spin_lock(&osb->osb_lock); | |
925 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
926 | slot = osb->s_inode_steal_slot; | |
927 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
928 | slot = osb->s_meta_steal_slot; | |
929 | spin_unlock(&osb->osb_lock); | |
930 | ||
931 | return slot; | |
932 | } | |
933 | ||
934 | static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
935 | { | |
936 | return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); | |
937 | } | |
938 | ||
939 | static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) | |
940 | { | |
941 | return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); | |
942 | } | |
943 | ||
944 | static int ocfs2_steal_resource(struct ocfs2_super *osb, | |
945 | struct ocfs2_alloc_context *ac, | |
946 | int type) | |
947 | { | |
948 | int i, status = -ENOSPC; | |
949 | int slot = __ocfs2_get_steal_slot(osb, type); | |
950 | ||
951 | /* Start to steal resource from the first slot after ours. */ | |
952 | if (slot == OCFS2_INVALID_SLOT) | |
953 | slot = osb->slot_num + 1; | |
954 | ||
955 | for (i = 0; i < osb->max_slots; i++, slot++) { | |
956 | if (slot == osb->max_slots) | |
957 | slot = 0; | |
958 | ||
959 | if (slot == osb->slot_num) | |
960 | continue; | |
961 | ||
962 | status = ocfs2_reserve_suballoc_bits(osb, ac, | |
963 | type, | |
964 | (u32)slot, NULL, | |
965 | NOT_ALLOC_NEW_GROUP); | |
966 | if (status >= 0) { | |
967 | __ocfs2_set_steal_slot(osb, slot, type); | |
968 | break; | |
969 | } | |
970 | ||
971 | ocfs2_free_ac_resource(ac); | |
972 | } | |
973 | ||
974 | return status; | |
975 | } | |
976 | ||
977 | static int ocfs2_steal_inode(struct ocfs2_super *osb, | |
978 | struct ocfs2_alloc_context *ac) | |
979 | { | |
980 | return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); | |
981 | } | |
982 | ||
983 | static int ocfs2_steal_meta(struct ocfs2_super *osb, | |
984 | struct ocfs2_alloc_context *ac) | |
985 | { | |
986 | return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); | |
987 | } | |
988 | ||
cf1d6c76 TY |
989 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
990 | int blocks, | |
991 | struct ocfs2_alloc_context **ac) | |
ccd979bd MF |
992 | { |
993 | int status; | |
b89c5428 | 994 | int slot = ocfs2_get_meta_steal_slot(osb); |
ccd979bd | 995 | |
cd861280 | 996 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
997 | if (!(*ac)) { |
998 | status = -ENOMEM; | |
999 | mlog_errno(status); | |
1000 | goto bail; | |
1001 | } | |
1002 | ||
cf1d6c76 | 1003 | (*ac)->ac_bits_wanted = blocks; |
ccd979bd | 1004 | (*ac)->ac_which = OCFS2_AC_USE_META; |
ccd979bd MF |
1005 | (*ac)->ac_group_search = ocfs2_block_group_search; |
1006 | ||
b89c5428 TY |
1007 | if (slot != OCFS2_INVALID_SLOT && |
1008 | atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) | |
1009 | goto extent_steal; | |
1010 | ||
1011 | atomic_set(&osb->s_num_meta_stolen, 0); | |
da5cbf2f | 1012 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
ffda89a3 | 1013 | EXTENT_ALLOC_SYSTEM_INODE, |
b89c5428 | 1014 | (u32)osb->slot_num, NULL, |
33d5d380 | 1015 | ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); |
b89c5428 TY |
1016 | |
1017 | ||
1018 | if (status >= 0) { | |
1019 | status = 0; | |
1020 | if (slot != OCFS2_INVALID_SLOT) | |
1021 | ocfs2_init_meta_steal_slot(osb); | |
1022 | goto bail; | |
1023 | } else if (status < 0 && status != -ENOSPC) { | |
1024 | mlog_errno(status); | |
1025 | goto bail; | |
1026 | } | |
1027 | ||
1028 | ocfs2_free_ac_resource(*ac); | |
1029 | ||
1030 | extent_steal: | |
1031 | status = ocfs2_steal_meta(osb, *ac); | |
1032 | atomic_inc(&osb->s_num_meta_stolen); | |
ccd979bd MF |
1033 | if (status < 0) { |
1034 | if (status != -ENOSPC) | |
1035 | mlog_errno(status); | |
1036 | goto bail; | |
1037 | } | |
1038 | ||
1039 | status = 0; | |
1040 | bail: | |
1041 | if ((status < 0) && *ac) { | |
1042 | ocfs2_free_alloc_context(*ac); | |
1043 | *ac = NULL; | |
1044 | } | |
1045 | ||
c1e8d35e TM |
1046 | if (status) |
1047 | mlog_errno(status); | |
ccd979bd MF |
1048 | return status; |
1049 | } | |
1050 | ||
cf1d6c76 TY |
1051 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
1052 | struct ocfs2_extent_list *root_el, | |
1053 | struct ocfs2_alloc_context **ac) | |
1054 | { | |
1055 | return ocfs2_reserve_new_metadata_blocks(osb, | |
1056 | ocfs2_extend_meta_needed(root_el), | |
1057 | ac); | |
1058 | } | |
1059 | ||
ccd979bd | 1060 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
ccd979bd MF |
1061 | struct ocfs2_alloc_context **ac) |
1062 | { | |
1063 | int status; | |
b89c5428 | 1064 | int slot = ocfs2_get_inode_steal_slot(osb); |
feb473a6 | 1065 | u64 alloc_group; |
ccd979bd | 1066 | |
cd861280 | 1067 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1068 | if (!(*ac)) { |
1069 | status = -ENOMEM; | |
1070 | mlog_errno(status); | |
1071 | goto bail; | |
1072 | } | |
1073 | ||
1074 | (*ac)->ac_bits_wanted = 1; | |
ccd979bd MF |
1075 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
1076 | ||
ccd979bd MF |
1077 | (*ac)->ac_group_search = ocfs2_block_group_search; |
1078 | ||
1187c968 JB |
1079 | /* |
1080 | * stat(2) can't handle i_ino > 32bits, so we tell the | |
1081 | * lower levels not to allocate us a block group past that | |
12462f1d | 1082 | * limit. The 'inode64' mount option avoids this behavior. |
1187c968 | 1083 | */ |
12462f1d JB |
1084 | if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) |
1085 | (*ac)->ac_max_block = (u32)~0U; | |
1187c968 | 1086 | |
4d0ddb2c TM |
1087 | /* |
1088 | * slot is set when we successfully steal inode from other nodes. | |
1089 | * It is reset in 3 places: | |
1090 | * 1. when we flush the truncate log | |
1091 | * 2. when we complete local alloc recovery. | |
1092 | * 3. when we successfully allocate from our own slot. | |
1093 | * After it is set, we will go on stealing inodes until we find the | |
1094 | * need to check our slots to see whether there is some space for us. | |
1095 | */ | |
1096 | if (slot != OCFS2_INVALID_SLOT && | |
b89c5428 | 1097 | atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) |
4d0ddb2c TM |
1098 | goto inode_steal; |
1099 | ||
1100 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
feb473a6 | 1101 | alloc_group = osb->osb_inode_alloc_group; |
da5cbf2f MF |
1102 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
1103 | INODE_ALLOC_SYSTEM_INODE, | |
b89c5428 | 1104 | (u32)osb->slot_num, |
feb473a6 | 1105 | &alloc_group, |
60ca81e8 TM |
1106 | ALLOC_NEW_GROUP | |
1107 | ALLOC_GROUPS_FROM_GLOBAL); | |
4d0ddb2c TM |
1108 | if (status >= 0) { |
1109 | status = 0; | |
1110 | ||
feb473a6 TM |
1111 | spin_lock(&osb->osb_lock); |
1112 | osb->osb_inode_alloc_group = alloc_group; | |
1113 | spin_unlock(&osb->osb_lock); | |
2f73e135 TM |
1114 | trace_ocfs2_reserve_new_inode_new_group( |
1115 | (unsigned long long)alloc_group); | |
feb473a6 | 1116 | |
4d0ddb2c TM |
1117 | /* |
1118 | * Some inodes must be freed by us, so try to allocate | |
1119 | * from our own next time. | |
1120 | */ | |
1121 | if (slot != OCFS2_INVALID_SLOT) | |
1122 | ocfs2_init_inode_steal_slot(osb); | |
1123 | goto bail; | |
1124 | } else if (status < 0 && status != -ENOSPC) { | |
1125 | mlog_errno(status); | |
1126 | goto bail; | |
1127 | } | |
1128 | ||
1129 | ocfs2_free_ac_resource(*ac); | |
1130 | ||
1131 | inode_steal: | |
b89c5428 | 1132 | status = ocfs2_steal_inode(osb, *ac); |
4d0ddb2c | 1133 | atomic_inc(&osb->s_num_inodes_stolen); |
ccd979bd MF |
1134 | if (status < 0) { |
1135 | if (status != -ENOSPC) | |
1136 | mlog_errno(status); | |
1137 | goto bail; | |
1138 | } | |
1139 | ||
1140 | status = 0; | |
1141 | bail: | |
1142 | if ((status < 0) && *ac) { | |
1143 | ocfs2_free_alloc_context(*ac); | |
1144 | *ac = NULL; | |
1145 | } | |
1146 | ||
c1e8d35e TM |
1147 | if (status) |
1148 | mlog_errno(status); | |
ccd979bd MF |
1149 | return status; |
1150 | } | |
1151 | ||
1152 | /* local alloc code has to do the same thing, so rather than do this | |
1153 | * twice.. */ | |
1154 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
1155 | struct ocfs2_alloc_context *ac) | |
1156 | { | |
1157 | int status; | |
1158 | ||
ccd979bd MF |
1159 | ac->ac_which = OCFS2_AC_USE_MAIN; |
1160 | ac->ac_group_search = ocfs2_cluster_group_search; | |
1161 | ||
da5cbf2f MF |
1162 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
1163 | GLOBAL_BITMAP_SYSTEM_INODE, | |
feb473a6 | 1164 | OCFS2_INVALID_SLOT, NULL, |
ffda89a3 | 1165 | ALLOC_NEW_GROUP); |
da5cbf2f | 1166 | if (status < 0 && status != -ENOSPC) { |
ccd979bd | 1167 | mlog_errno(status); |
da5cbf2f MF |
1168 | goto bail; |
1169 | } | |
1170 | ||
ccd979bd MF |
1171 | bail: |
1172 | return status; | |
1173 | } | |
1174 | ||
1175 | /* Callers don't need to care which bitmap (local alloc or main) to | |
1176 | * use so we figure it out for them, but unfortunately this clutters | |
1177 | * things a bit. */ | |
1187c968 JB |
1178 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
1179 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 1180 | int flags, |
1187c968 | 1181 | struct ocfs2_alloc_context **ac) |
ccd979bd MF |
1182 | { |
1183 | int status; | |
1184 | ||
cd861280 | 1185 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1186 | if (!(*ac)) { |
1187 | status = -ENOMEM; | |
1188 | mlog_errno(status); | |
1189 | goto bail; | |
1190 | } | |
1191 | ||
1192 | (*ac)->ac_bits_wanted = bits_wanted; | |
1187c968 | 1193 | (*ac)->ac_max_block = max_block; |
ccd979bd MF |
1194 | |
1195 | status = -ENOSPC; | |
60ca81e8 TM |
1196 | if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && |
1197 | ocfs2_alloc_should_use_local(osb, bits_wanted)) { | |
ccd979bd | 1198 | status = ocfs2_reserve_local_alloc_bits(osb, |
ccd979bd MF |
1199 | bits_wanted, |
1200 | *ac); | |
a57c8fd2 | 1201 | if ((status < 0) && (status != -ENOSPC)) { |
ccd979bd MF |
1202 | mlog_errno(status); |
1203 | goto bail; | |
ccd979bd MF |
1204 | } |
1205 | } | |
1206 | ||
1207 | if (status == -ENOSPC) { | |
1208 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); | |
1209 | if (status < 0) { | |
1210 | if (status != -ENOSPC) | |
1211 | mlog_errno(status); | |
1212 | goto bail; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | status = 0; | |
1217 | bail: | |
1218 | if ((status < 0) && *ac) { | |
1219 | ocfs2_free_alloc_context(*ac); | |
1220 | *ac = NULL; | |
1221 | } | |
1222 | ||
c1e8d35e TM |
1223 | if (status) |
1224 | mlog_errno(status); | |
ccd979bd MF |
1225 | return status; |
1226 | } | |
1227 | ||
1187c968 JB |
1228 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, |
1229 | u32 bits_wanted, | |
1230 | struct ocfs2_alloc_context **ac) | |
1231 | { | |
60ca81e8 TM |
1232 | return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, |
1233 | ALLOC_NEW_GROUP, ac); | |
1187c968 JB |
1234 | } |
1235 | ||
ccd979bd MF |
1236 | /* |
1237 | * More or less lifted from ext3. I'll leave their description below: | |
1238 | * | |
1239 | * "For ext3 allocations, we must not reuse any blocks which are | |
1240 | * allocated in the bitmap buffer's "last committed data" copy. This | |
1241 | * prevents deletes from freeing up the page for reuse until we have | |
1242 | * committed the delete transaction. | |
1243 | * | |
1244 | * If we didn't do this, then deleting something and reallocating it as | |
1245 | * data would allow the old block to be overwritten before the | |
1246 | * transaction committed (because we force data to disk before commit). | |
1247 | * This would lead to corruption if we crashed between overwriting the | |
1248 | * data and committing the delete. | |
1249 | * | |
1250 | * @@@ We may want to make this allocation behaviour conditional on | |
1251 | * data-writes at some point, and disable it for metadata allocations or | |
1252 | * sync-data inodes." | |
1253 | * | |
1254 | * Note: OCFS2 already does this differently for metadata vs data | |
c78bad11 | 1255 | * allocations, as those bitmaps are separate and undo access is never |
ccd979bd MF |
1256 | * called on a metadata group descriptor. |
1257 | */ | |
1258 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
1259 | int nr) | |
1260 | { | |
1261 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
94e41ecf | 1262 | int ret; |
ccd979bd MF |
1263 | |
1264 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) | |
1265 | return 0; | |
94e41ecf SM |
1266 | |
1267 | if (!buffer_jbd(bg_bh)) | |
ccd979bd MF |
1268 | return 1; |
1269 | ||
94e41ecf | 1270 | jbd_lock_bh_state(bg_bh); |
ccd979bd | 1271 | bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; |
94e41ecf SM |
1272 | if (bg) |
1273 | ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); | |
1274 | else | |
1275 | ret = 1; | |
1276 | jbd_unlock_bh_state(bg_bh); | |
1277 | ||
1278 | return ret; | |
ccd979bd MF |
1279 | } |
1280 | ||
1281 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, | |
1282 | struct buffer_head *bg_bh, | |
1283 | unsigned int bits_wanted, | |
7bf72ede | 1284 | unsigned int total_bits, |
7d1fe093 | 1285 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1286 | { |
1287 | void *bitmap; | |
1288 | u16 best_offset, best_size; | |
1289 | int offset, start, found, status = 0; | |
1290 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1291 | ||
42035306 JB |
1292 | /* Callers got this descriptor from |
1293 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1294 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1295 | |
1296 | found = start = best_offset = best_size = 0; | |
1297 | bitmap = bg->bg_bitmap; | |
1298 | ||
7bf72ede MF |
1299 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
1300 | if (offset == total_bits) | |
ccd979bd MF |
1301 | break; |
1302 | ||
1303 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { | |
1304 | /* We found a zero, but we can't use it as it | |
1305 | * hasn't been put to disk yet! */ | |
1306 | found = 0; | |
1307 | start = offset + 1; | |
1308 | } else if (offset == start) { | |
1309 | /* we found a zero */ | |
1310 | found++; | |
1311 | /* move start to the next bit to test */ | |
1312 | start++; | |
1313 | } else { | |
1314 | /* got a zero after some ones */ | |
1315 | found = 1; | |
1316 | start = offset + 1; | |
1317 | } | |
1318 | if (found > best_size) { | |
1319 | best_size = found; | |
1320 | best_offset = start - found; | |
1321 | } | |
1322 | /* we got everything we needed */ | |
1323 | if (found == bits_wanted) { | |
1324 | /* mlog(0, "Found it all!\n"); */ | |
1325 | break; | |
1326 | } | |
1327 | } | |
1328 | ||
7d1fe093 JB |
1329 | if (best_size) { |
1330 | res->sr_bit_offset = best_offset; | |
1331 | res->sr_bits = best_size; | |
ccd979bd MF |
1332 | } else { |
1333 | status = -ENOSPC; | |
1334 | /* No error log here -- see the comment above | |
1335 | * ocfs2_test_bg_bit_allocatable */ | |
1336 | } | |
1337 | ||
1338 | return status; | |
1339 | } | |
1340 | ||
0a2fcd89 | 1341 | int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
1342 | struct inode *alloc_inode, |
1343 | struct ocfs2_group_desc *bg, | |
1344 | struct buffer_head *group_bh, | |
1345 | unsigned int bit_off, | |
1346 | unsigned int num_bits) | |
1347 | { | |
1348 | int status; | |
1349 | void *bitmap = bg->bg_bitmap; | |
1350 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1351 | ||
42035306 JB |
1352 | /* All callers get the descriptor via |
1353 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1354 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1355 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); |
1356 | ||
2f73e135 | 1357 | trace_ocfs2_block_group_set_bits(bit_off, num_bits); |
ccd979bd MF |
1358 | |
1359 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1360 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
1361 | ||
13723d00 | 1362 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 1363 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1364 | group_bh, |
1365 | journal_type); | |
ccd979bd MF |
1366 | if (status < 0) { |
1367 | mlog_errno(status); | |
1368 | goto bail; | |
1369 | } | |
1370 | ||
1371 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); | |
9b5cd10e SE |
1372 | if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { |
1373 | ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit" | |
1374 | " count %u but claims %u are freed. num_bits %d", | |
1375 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1376 | le16_to_cpu(bg->bg_bits), | |
1377 | le16_to_cpu(bg->bg_free_bits_count), num_bits); | |
1378 | return -EROFS; | |
1379 | } | |
ccd979bd MF |
1380 | while(num_bits--) |
1381 | ocfs2_set_bit(bit_off++, bitmap); | |
1382 | ||
ec20cec7 | 1383 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
1384 | |
1385 | bail: | |
ccd979bd MF |
1386 | return status; |
1387 | } | |
1388 | ||
1389 | /* find the one with the most empty bits */ | |
1390 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) | |
1391 | { | |
1392 | u16 curr, best; | |
1393 | ||
1394 | BUG_ON(!cl->cl_next_free_rec); | |
1395 | ||
1396 | best = curr = 0; | |
1397 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { | |
1398 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > | |
1399 | le32_to_cpu(cl->cl_recs[best].c_free)) | |
1400 | best = curr; | |
1401 | curr++; | |
1402 | } | |
1403 | ||
1404 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); | |
1405 | return best; | |
1406 | } | |
1407 | ||
1fabe148 | 1408 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
1409 | struct inode *alloc_inode, |
1410 | struct buffer_head *fe_bh, | |
1411 | struct buffer_head *bg_bh, | |
1412 | struct buffer_head *prev_bg_bh, | |
1413 | u16 chain) | |
1414 | { | |
1415 | int status; | |
1416 | /* there is a really tiny chance the journal calls could fail, | |
1417 | * but we wouldn't want inconsistent blocks in *any* case. */ | |
49309841 | 1418 | u64 bg_ptr, prev_bg_ptr; |
ccd979bd MF |
1419 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; |
1420 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1421 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; | |
1422 | ||
42035306 JB |
1423 | /* The caller got these descriptors from |
1424 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1425 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
1426 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); | |
ccd979bd | 1427 | |
2f73e135 TM |
1428 | trace_ocfs2_relink_block_group( |
1429 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, | |
1430 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1431 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); | |
ccd979bd | 1432 | |
ccd979bd MF |
1433 | bg_ptr = le64_to_cpu(bg->bg_next_group); |
1434 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); | |
1435 | ||
0cf2f763 JB |
1436 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1437 | prev_bg_bh, | |
13723d00 | 1438 | OCFS2_JOURNAL_ACCESS_WRITE); |
25e28921 | 1439 | if (status < 0) |
49309841 | 1440 | goto out; |
ccd979bd MF |
1441 | |
1442 | prev_bg->bg_next_group = bg->bg_next_group; | |
ec20cec7 | 1443 | ocfs2_journal_dirty(handle, prev_bg_bh); |
ccd979bd | 1444 | |
0cf2f763 JB |
1445 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1446 | bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
25e28921 | 1447 | if (status < 0) |
49309841 | 1448 | goto out_rollback_prev_bg; |
ccd979bd MF |
1449 | |
1450 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; | |
ec20cec7 | 1451 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd | 1452 | |
0cf2f763 JB |
1453 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
1454 | fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
25e28921 | 1455 | if (status < 0) |
49309841 | 1456 | goto out_rollback_bg; |
ccd979bd MF |
1457 | |
1458 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; | |
ec20cec7 | 1459 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 1460 | |
49309841 | 1461 | out: |
25e28921 AM |
1462 | if (status < 0) |
1463 | mlog_errno(status); | |
49309841 | 1464 | return status; |
42035306 | 1465 | |
49309841 JL |
1466 | out_rollback_bg: |
1467 | bg->bg_next_group = cpu_to_le64(bg_ptr); | |
1468 | out_rollback_prev_bg: | |
1469 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); | |
25e28921 | 1470 | goto out; |
ccd979bd MF |
1471 | } |
1472 | ||
1473 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
1474 | u32 wanted) | |
1475 | { | |
1476 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; | |
1477 | } | |
1478 | ||
1479 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 | |
1480 | * value on error. */ | |
1481 | static int ocfs2_cluster_group_search(struct inode *inode, | |
1482 | struct buffer_head *group_bh, | |
1483 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1484 | u64 max_block, |
7d1fe093 | 1485 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1486 | { |
1487 | int search = -ENOSPC; | |
1488 | int ret; | |
1187c968 | 1489 | u64 blkoff; |
7bf72ede | 1490 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
9c7af40b | 1491 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bf72ede | 1492 | unsigned int max_bits, gd_cluster_off; |
ccd979bd MF |
1493 | |
1494 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1495 | ||
7bf72ede MF |
1496 | if (gd->bg_free_bits_count) { |
1497 | max_bits = le16_to_cpu(gd->bg_bits); | |
1498 | ||
1499 | /* Tail groups in cluster bitmaps which aren't cpg | |
25985edc | 1500 | * aligned are prone to partial extension by a failed |
7bf72ede MF |
1501 | * fs resize. If the file system resize never got to |
1502 | * update the dinode cluster count, then we don't want | |
1503 | * to trust any clusters past it, regardless of what | |
1504 | * the group descriptor says. */ | |
1505 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, | |
1506 | le64_to_cpu(gd->bg_blkno)); | |
1507 | if ((gd_cluster_off + max_bits) > | |
1508 | OCFS2_I(inode)->ip_clusters) { | |
1509 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; | |
2f73e135 TM |
1510 | trace_ocfs2_cluster_group_search_wrong_max_bits( |
1511 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
1512 | le16_to_cpu(gd->bg_bits), | |
1513 | OCFS2_I(inode)->ip_clusters, max_bits); | |
7bf72ede MF |
1514 | } |
1515 | ||
ccd979bd MF |
1516 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1517 | group_bh, bits_wanted, | |
7d1fe093 | 1518 | max_bits, res); |
ccd979bd MF |
1519 | if (ret) |
1520 | return ret; | |
1521 | ||
1187c968 JB |
1522 | if (max_block) { |
1523 | blkoff = ocfs2_clusters_to_blocks(inode->i_sb, | |
1524 | gd_cluster_off + | |
7d1fe093 JB |
1525 | res->sr_bit_offset + |
1526 | res->sr_bits); | |
2f73e135 TM |
1527 | trace_ocfs2_cluster_group_search_max_block( |
1528 | (unsigned long long)blkoff, | |
1529 | (unsigned long long)max_block); | |
1187c968 JB |
1530 | if (blkoff > max_block) |
1531 | return -ENOSPC; | |
1532 | } | |
1533 | ||
ccd979bd MF |
1534 | /* ocfs2_block_group_find_clear_bits() might |
1535 | * return success, but we still want to return | |
1536 | * -ENOSPC unless it found the minimum number | |
1537 | * of bits. */ | |
7d1fe093 | 1538 | if (min_bits <= res->sr_bits) |
ccd979bd | 1539 | search = 0; /* success */ |
7d1fe093 | 1540 | else if (res->sr_bits) { |
9c7af40b MF |
1541 | /* |
1542 | * Don't show bits which we'll be returning | |
1543 | * for allocation to the local alloc bitmap. | |
1544 | */ | |
7d1fe093 | 1545 | ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); |
ccd979bd MF |
1546 | } |
1547 | } | |
1548 | ||
1549 | return search; | |
1550 | } | |
1551 | ||
1552 | static int ocfs2_block_group_search(struct inode *inode, | |
1553 | struct buffer_head *group_bh, | |
1554 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1555 | u64 max_block, |
7d1fe093 | 1556 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1557 | { |
1558 | int ret = -ENOSPC; | |
1187c968 | 1559 | u64 blkoff; |
ccd979bd MF |
1560 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; |
1561 | ||
1562 | BUG_ON(min_bits != 1); | |
1563 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); | |
1564 | ||
1187c968 | 1565 | if (bg->bg_free_bits_count) { |
ccd979bd MF |
1566 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1567 | group_bh, bits_wanted, | |
7bf72ede | 1568 | le16_to_cpu(bg->bg_bits), |
7d1fe093 | 1569 | res); |
1187c968 | 1570 | if (!ret && max_block) { |
7d1fe093 JB |
1571 | blkoff = le64_to_cpu(bg->bg_blkno) + |
1572 | res->sr_bit_offset + res->sr_bits; | |
2f73e135 TM |
1573 | trace_ocfs2_block_group_search_max_block( |
1574 | (unsigned long long)blkoff, | |
1575 | (unsigned long long)max_block); | |
1187c968 JB |
1576 | if (blkoff > max_block) |
1577 | ret = -ENOSPC; | |
1578 | } | |
1579 | } | |
ccd979bd MF |
1580 | |
1581 | return ret; | |
1582 | } | |
1583 | ||
0a2fcd89 | 1584 | int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
1fabe148 | 1585 | handle_t *handle, |
883d4cae MF |
1586 | struct buffer_head *di_bh, |
1587 | u32 num_bits, | |
1588 | u16 chain) | |
1589 | { | |
1590 | int ret; | |
1591 | u32 tmp_used; | |
1592 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1593 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; | |
1594 | ||
0cf2f763 | 1595 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
13723d00 | 1596 | OCFS2_JOURNAL_ACCESS_WRITE); |
883d4cae MF |
1597 | if (ret < 0) { |
1598 | mlog_errno(ret); | |
1599 | goto out; | |
1600 | } | |
1601 | ||
1602 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1603 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); | |
1604 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); | |
ec20cec7 | 1605 | ocfs2_journal_dirty(handle, di_bh); |
883d4cae MF |
1606 | |
1607 | out: | |
1608 | return ret; | |
1609 | } | |
1610 | ||
db66c715 YL |
1611 | void ocfs2_rollback_alloc_dinode_counts(struct inode *inode, |
1612 | struct buffer_head *di_bh, | |
1613 | u32 num_bits, | |
1614 | u16 chain) | |
1615 | { | |
1616 | u32 tmp_used; | |
1617 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1618 | struct ocfs2_chain_list *cl; | |
1619 | ||
1620 | cl = (struct ocfs2_chain_list *)&di->id2.i_chain; | |
1621 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1622 | di->id1.bitmap1.i_used = cpu_to_le32(tmp_used - num_bits); | |
1623 | le32_add_cpu(&cl->cl_recs[chain].c_free, num_bits); | |
1624 | } | |
1625 | ||
ba206635 JB |
1626 | static int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, |
1627 | struct ocfs2_extent_rec *rec, | |
1628 | struct ocfs2_chain_list *cl) | |
13e434cf JB |
1629 | { |
1630 | unsigned int bpc = le16_to_cpu(cl->cl_bpc); | |
1631 | unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; | |
72094e43 | 1632 | unsigned int bitcount = le16_to_cpu(rec->e_leaf_clusters) * bpc; |
13e434cf JB |
1633 | |
1634 | if (res->sr_bit_offset < bitoff) | |
1635 | return 0; | |
1636 | if (res->sr_bit_offset >= (bitoff + bitcount)) | |
1637 | return 0; | |
ba206635 JB |
1638 | res->sr_blkno = le64_to_cpu(rec->e_blkno) + |
1639 | (res->sr_bit_offset - bitoff); | |
13e434cf JB |
1640 | if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) |
1641 | res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; | |
1642 | return 1; | |
1643 | } | |
1644 | ||
ba206635 JB |
1645 | static void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, |
1646 | struct ocfs2_group_desc *bg, | |
1647 | struct ocfs2_suballoc_result *res) | |
13e434cf JB |
1648 | { |
1649 | int i; | |
2b6cb576 | 1650 | u64 bg_blkno = res->sr_bg_blkno; /* Save off */ |
13e434cf JB |
1651 | struct ocfs2_extent_rec *rec; |
1652 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; | |
1653 | struct ocfs2_chain_list *cl = &di->id2.i_chain; | |
1654 | ||
ba206635 JB |
1655 | if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { |
1656 | res->sr_blkno = 0; | |
13e434cf | 1657 | return; |
ba206635 | 1658 | } |
13e434cf | 1659 | |
ba206635 | 1660 | res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; |
2b6cb576 | 1661 | res->sr_bg_blkno = 0; /* Clear it for contig block groups */ |
4711954e | 1662 | if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || |
ba206635 | 1663 | !bg->bg_list.l_next_free_rec) |
13e434cf JB |
1664 | return; |
1665 | ||
1666 | for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { | |
1667 | rec = &bg->bg_list.l_recs[i]; | |
2b6cb576 JB |
1668 | if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { |
1669 | res->sr_bg_blkno = bg_blkno; /* Restore */ | |
13e434cf | 1670 | break; |
2b6cb576 | 1671 | } |
13e434cf JB |
1672 | } |
1673 | } | |
1674 | ||
883d4cae | 1675 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, |
1fabe148 | 1676 | handle_t *handle, |
883d4cae MF |
1677 | u32 bits_wanted, |
1678 | u32 min_bits, | |
7d1fe093 | 1679 | struct ocfs2_suballoc_result *res, |
883d4cae MF |
1680 | u16 *bits_left) |
1681 | { | |
1682 | int ret; | |
883d4cae MF |
1683 | struct buffer_head *group_bh = NULL; |
1684 | struct ocfs2_group_desc *gd; | |
68f64d47 | 1685 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; |
883d4cae | 1686 | struct inode *alloc_inode = ac->ac_inode; |
883d4cae | 1687 | |
7d1fe093 JB |
1688 | ret = ocfs2_read_group_descriptor(alloc_inode, di, |
1689 | res->sr_bg_blkno, &group_bh); | |
883d4cae MF |
1690 | if (ret < 0) { |
1691 | mlog_errno(ret); | |
1692 | return ret; | |
1693 | } | |
1694 | ||
1695 | gd = (struct ocfs2_group_desc *) group_bh->b_data; | |
883d4cae | 1696 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, |
7d1fe093 | 1697 | ac->ac_max_block, res); |
883d4cae MF |
1698 | if (ret < 0) { |
1699 | if (ret != -ENOSPC) | |
1700 | mlog_errno(ret); | |
1701 | goto out; | |
1702 | } | |
1703 | ||
13e434cf | 1704 | if (!ret) |
ba206635 | 1705 | ocfs2_bg_discontig_fix_result(ac, gd, res); |
13e434cf | 1706 | |
e49e2767 MF |
1707 | /* |
1708 | * sr_bg_blkno might have been changed by | |
1709 | * ocfs2_bg_discontig_fix_result | |
1710 | */ | |
1711 | res->sr_bg_stable_blkno = group_bh->b_blocknr; | |
1712 | ||
1713 | if (ac->ac_find_loc_only) | |
1714 | goto out_loc_only; | |
1715 | ||
883d4cae | 1716 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, |
7d1fe093 | 1717 | res->sr_bits, |
883d4cae MF |
1718 | le16_to_cpu(gd->bg_chain)); |
1719 | if (ret < 0) { | |
1720 | mlog_errno(ret); | |
1721 | goto out; | |
1722 | } | |
1723 | ||
1724 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, | |
7d1fe093 | 1725 | res->sr_bit_offset, res->sr_bits); |
db66c715 YL |
1726 | if (ret < 0) { |
1727 | ocfs2_rollback_alloc_dinode_counts(alloc_inode, ac->ac_bh, | |
1728 | res->sr_bits, | |
1729 | le16_to_cpu(gd->bg_chain)); | |
883d4cae | 1730 | mlog_errno(ret); |
db66c715 | 1731 | } |
883d4cae | 1732 | |
e49e2767 | 1733 | out_loc_only: |
883d4cae MF |
1734 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); |
1735 | ||
1736 | out: | |
1737 | brelse(group_bh); | |
1738 | ||
1739 | return ret; | |
1740 | } | |
1741 | ||
ccd979bd | 1742 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
1fabe148 | 1743 | handle_t *handle, |
ccd979bd MF |
1744 | u32 bits_wanted, |
1745 | u32 min_bits, | |
7d1fe093 | 1746 | struct ocfs2_suballoc_result *res, |
883d4cae | 1747 | u16 *bits_left) |
ccd979bd MF |
1748 | { |
1749 | int status; | |
7d1fe093 | 1750 | u16 chain; |
ccd979bd | 1751 | u64 next_group; |
ccd979bd MF |
1752 | struct inode *alloc_inode = ac->ac_inode; |
1753 | struct buffer_head *group_bh = NULL; | |
1754 | struct buffer_head *prev_group_bh = NULL; | |
1755 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1756 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; | |
1757 | struct ocfs2_group_desc *bg; | |
1758 | ||
1759 | chain = ac->ac_chain; | |
2f73e135 TM |
1760 | trace_ocfs2_search_chain_begin( |
1761 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, | |
1762 | bits_wanted, chain); | |
ccd979bd | 1763 | |
68f64d47 JB |
1764 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1765 | le64_to_cpu(cl->cl_recs[chain].c_blkno), | |
1766 | &group_bh); | |
ccd979bd MF |
1767 | if (status < 0) { |
1768 | mlog_errno(status); | |
1769 | goto bail; | |
1770 | } | |
1771 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1772 | |
1773 | status = -ENOSPC; | |
1774 | /* for now, the chain search is a bit simplistic. We just use | |
1775 | * the 1st group with any empty bits. */ | |
1187c968 JB |
1776 | while ((status = ac->ac_group_search(alloc_inode, group_bh, |
1777 | bits_wanted, min_bits, | |
7d1fe093 JB |
1778 | ac->ac_max_block, |
1779 | res)) == -ENOSPC) { | |
ccd979bd MF |
1780 | if (!bg->bg_next_group) |
1781 | break; | |
a81cb88b MF |
1782 | |
1783 | brelse(prev_group_bh); | |
1784 | prev_group_bh = NULL; | |
1785 | ||
ccd979bd MF |
1786 | next_group = le64_to_cpu(bg->bg_next_group); |
1787 | prev_group_bh = group_bh; | |
1788 | group_bh = NULL; | |
68f64d47 JB |
1789 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1790 | next_group, &group_bh); | |
ccd979bd MF |
1791 | if (status < 0) { |
1792 | mlog_errno(status); | |
1793 | goto bail; | |
1794 | } | |
1795 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1796 | } |
1797 | if (status < 0) { | |
1798 | if (status != -ENOSPC) | |
1799 | mlog_errno(status); | |
1800 | goto bail; | |
1801 | } | |
1802 | ||
2f73e135 TM |
1803 | trace_ocfs2_search_chain_succ( |
1804 | (unsigned long long)le64_to_cpu(bg->bg_blkno), res->sr_bits); | |
ccd979bd | 1805 | |
7d1fe093 | 1806 | res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); |
ccd979bd | 1807 | |
7d1fe093 | 1808 | BUG_ON(res->sr_bits == 0); |
13e434cf | 1809 | if (!status) |
ba206635 | 1810 | ocfs2_bg_discontig_fix_result(ac, bg, res); |
13e434cf | 1811 | |
e49e2767 MF |
1812 | /* |
1813 | * sr_bg_blkno might have been changed by | |
1814 | * ocfs2_bg_discontig_fix_result | |
1815 | */ | |
1816 | res->sr_bg_stable_blkno = group_bh->b_blocknr; | |
ccd979bd MF |
1817 | |
1818 | /* | |
1819 | * Keep track of previous block descriptor read. When | |
1820 | * we find a target, if we have read more than X | |
1821 | * number of descriptors, and the target is reasonably | |
1822 | * empty, relink him to top of his chain. | |
1823 | * | |
1824 | * We've read 0 extra blocks and only send one more to | |
1825 | * the transaction, yet the next guy to search has a | |
1826 | * much easier time. | |
1827 | * | |
1828 | * Do this *after* figuring out how many bits we're taking out | |
1829 | * of our target group. | |
1830 | */ | |
309a85b6 | 1831 | if (!ac->ac_disable_chain_relink && |
ccd979bd | 1832 | (prev_group_bh) && |
7d1fe093 | 1833 | (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { |
ccd979bd MF |
1834 | status = ocfs2_relink_block_group(handle, alloc_inode, |
1835 | ac->ac_bh, group_bh, | |
1836 | prev_group_bh, chain); | |
1837 | if (status < 0) { | |
1838 | mlog_errno(status); | |
1839 | goto bail; | |
1840 | } | |
1841 | } | |
1842 | ||
e49e2767 MF |
1843 | if (ac->ac_find_loc_only) |
1844 | goto out_loc_only; | |
1845 | ||
d5134982 MF |
1846 | status = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, |
1847 | ac->ac_bh, res->sr_bits, | |
1848 | chain); | |
1849 | if (status) { | |
ccd979bd MF |
1850 | mlog_errno(status); |
1851 | goto bail; | |
1852 | } | |
1853 | ||
ccd979bd MF |
1854 | status = ocfs2_block_group_set_bits(handle, |
1855 | alloc_inode, | |
1856 | bg, | |
1857 | group_bh, | |
7d1fe093 JB |
1858 | res->sr_bit_offset, |
1859 | res->sr_bits); | |
ccd979bd | 1860 | if (status < 0) { |
db66c715 YL |
1861 | ocfs2_rollback_alloc_dinode_counts(alloc_inode, |
1862 | ac->ac_bh, res->sr_bits, chain); | |
ccd979bd MF |
1863 | mlog_errno(status); |
1864 | goto bail; | |
1865 | } | |
1866 | ||
2f73e135 TM |
1867 | trace_ocfs2_search_chain_end( |
1868 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
1869 | res->sr_bits); | |
ccd979bd | 1870 | |
e49e2767 | 1871 | out_loc_only: |
883d4cae | 1872 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
ccd979bd | 1873 | bail: |
a81cb88b MF |
1874 | brelse(group_bh); |
1875 | brelse(prev_group_bh); | |
ccd979bd | 1876 | |
c1e8d35e TM |
1877 | if (status) |
1878 | mlog_errno(status); | |
ccd979bd MF |
1879 | return status; |
1880 | } | |
1881 | ||
1882 | /* will give out up to bits_wanted contiguous bits. */ | |
aa8f8e93 | 1883 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 1884 | handle_t *handle, |
ccd979bd MF |
1885 | u32 bits_wanted, |
1886 | u32 min_bits, | |
7d1fe093 | 1887 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1888 | { |
1889 | int status; | |
1890 | u16 victim, i; | |
883d4cae | 1891 | u16 bits_left = 0; |
b2b6ebf5 | 1892 | u64 hint = ac->ac_last_group; |
ccd979bd MF |
1893 | struct ocfs2_chain_list *cl; |
1894 | struct ocfs2_dinode *fe; | |
1895 | ||
ccd979bd MF |
1896 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
1897 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); | |
1898 | BUG_ON(!ac->ac_bh); | |
1899 | ||
1900 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
10995aa2 JB |
1901 | |
1902 | /* The bh was validated by the inode read during | |
1903 | * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ | |
1904 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
1905 | ||
ccd979bd MF |
1906 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= |
1907 | le32_to_cpu(fe->id1.bitmap1.i_total)) { | |
aa8f8e93 JB |
1908 | ocfs2_error(ac->ac_inode->i_sb, |
1909 | "Chain allocator dinode %llu has %u used " | |
b0697053 MF |
1910 | "bits but only %u total.", |
1911 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
ccd979bd MF |
1912 | le32_to_cpu(fe->id1.bitmap1.i_used), |
1913 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
1914 | status = -EIO; | |
1915 | goto bail; | |
1916 | } | |
1917 | ||
b2b6ebf5 | 1918 | res->sr_bg_blkno = hint; |
7d1fe093 | 1919 | if (res->sr_bg_blkno) { |
883d4cae MF |
1920 | /* Attempt to short-circuit the usual search mechanism |
1921 | * by jumping straight to the most recently used | |
b595076a | 1922 | * allocation group. This helps us maintain some |
883d4cae | 1923 | * contiguousness across allocations. */ |
da5cbf2f | 1924 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
7d1fe093 JB |
1925 | min_bits, res, &bits_left); |
1926 | if (!status) | |
883d4cae | 1927 | goto set_hint; |
883d4cae MF |
1928 | if (status < 0 && status != -ENOSPC) { |
1929 | mlog_errno(status); | |
1930 | goto bail; | |
1931 | } | |
1932 | } | |
1933 | ||
ccd979bd MF |
1934 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
1935 | ||
1936 | victim = ocfs2_find_victim_chain(cl); | |
1937 | ac->ac_chain = victim; | |
ccd979bd | 1938 | |
7d1fe093 JB |
1939 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
1940 | res, &bits_left); | |
b2b6ebf5 MF |
1941 | if (!status) { |
1942 | hint = ocfs2_group_from_res(res); | |
883d4cae | 1943 | goto set_hint; |
b2b6ebf5 | 1944 | } |
ccd979bd MF |
1945 | if (status < 0 && status != -ENOSPC) { |
1946 | mlog_errno(status); | |
1947 | goto bail; | |
1948 | } | |
1949 | ||
2f73e135 | 1950 | trace_ocfs2_claim_suballoc_bits(victim); |
ccd979bd MF |
1951 | |
1952 | /* If we didn't pick a good victim, then just default to | |
1953 | * searching each chain in order. Don't allow chain relinking | |
1954 | * because we only calculate enough journal credits for one | |
1955 | * relink per alloc. */ | |
309a85b6 | 1956 | ac->ac_disable_chain_relink = 1; |
ccd979bd MF |
1957 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { |
1958 | if (i == victim) | |
1959 | continue; | |
1960 | if (!cl->cl_recs[i].c_free) | |
1961 | continue; | |
1962 | ||
1963 | ac->ac_chain = i; | |
da5cbf2f | 1964 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
7d1fe093 | 1965 | res, &bits_left); |
b2b6ebf5 MF |
1966 | if (!status) { |
1967 | hint = ocfs2_group_from_res(res); | |
ccd979bd | 1968 | break; |
b2b6ebf5 | 1969 | } |
ccd979bd MF |
1970 | if (status < 0 && status != -ENOSPC) { |
1971 | mlog_errno(status); | |
1972 | goto bail; | |
1973 | } | |
1974 | } | |
ccd979bd | 1975 | |
883d4cae MF |
1976 | set_hint: |
1977 | if (status != -ENOSPC) { | |
1978 | /* If the next search of this group is not likely to | |
1979 | * yield a suitable extent, then we reset the last | |
1980 | * group hint so as to not waste a disk read */ | |
1981 | if (bits_left < min_bits) | |
1982 | ac->ac_last_group = 0; | |
1983 | else | |
b2b6ebf5 | 1984 | ac->ac_last_group = hint; |
883d4cae MF |
1985 | } |
1986 | ||
1987 | bail: | |
c1e8d35e TM |
1988 | if (status) |
1989 | mlog_errno(status); | |
ccd979bd MF |
1990 | return status; |
1991 | } | |
1992 | ||
1ed9b777 | 1993 | int ocfs2_claim_metadata(handle_t *handle, |
ccd979bd MF |
1994 | struct ocfs2_alloc_context *ac, |
1995 | u32 bits_wanted, | |
2b6cb576 | 1996 | u64 *suballoc_loc, |
ccd979bd MF |
1997 | u16 *suballoc_bit_start, |
1998 | unsigned int *num_bits, | |
1999 | u64 *blkno_start) | |
2000 | { | |
2001 | int status; | |
ba206635 | 2002 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
ccd979bd MF |
2003 | |
2004 | BUG_ON(!ac); | |
2005 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); | |
2006 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); | |
ccd979bd | 2007 | |
aa8f8e93 | 2008 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2009 | handle, |
ccd979bd MF |
2010 | bits_wanted, |
2011 | 1, | |
7d1fe093 | 2012 | &res); |
ccd979bd MF |
2013 | if (status < 0) { |
2014 | mlog_errno(status); | |
2015 | goto bail; | |
2016 | } | |
1ed9b777 | 2017 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2018 | |
2b6cb576 | 2019 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2020 | *suballoc_bit_start = res.sr_bit_offset; |
ba206635 | 2021 | *blkno_start = res.sr_blkno; |
7d1fe093 JB |
2022 | ac->ac_bits_given += res.sr_bits; |
2023 | *num_bits = res.sr_bits; | |
ccd979bd MF |
2024 | status = 0; |
2025 | bail: | |
c1e8d35e TM |
2026 | if (status) |
2027 | mlog_errno(status); | |
ccd979bd MF |
2028 | return status; |
2029 | } | |
2030 | ||
13821151 | 2031 | static void ocfs2_init_inode_ac_group(struct inode *dir, |
abf1b3cb | 2032 | struct buffer_head *parent_di_bh, |
13821151 TM |
2033 | struct ocfs2_alloc_context *ac) |
2034 | { | |
abf1b3cb | 2035 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data; |
13821151 TM |
2036 | /* |
2037 | * Try to allocate inodes from some specific group. | |
2038 | * | |
2039 | * If the parent dir has recorded the last group used in allocation, | |
2040 | * cool, use it. Otherwise if we try to allocate new inode from the | |
2041 | * same slot the parent dir belongs to, use the same chunk. | |
2042 | * | |
2043 | * We are very careful here to avoid the mistake of setting | |
2044 | * ac_last_group to a group descriptor from a different (unlocked) slot. | |
2045 | */ | |
2046 | if (OCFS2_I(dir)->ip_last_used_group && | |
2047 | OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) | |
2048 | ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; | |
abf1b3cb TM |
2049 | else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) { |
2050 | if (di->i_suballoc_loc) | |
2051 | ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc); | |
2052 | else | |
2053 | ac->ac_last_group = ocfs2_which_suballoc_group( | |
2054 | le64_to_cpu(di->i_blkno), | |
2055 | le16_to_cpu(di->i_suballoc_bit)); | |
2056 | } | |
13821151 TM |
2057 | } |
2058 | ||
2059 | static inline void ocfs2_save_inode_ac_group(struct inode *dir, | |
2060 | struct ocfs2_alloc_context *ac) | |
2061 | { | |
2062 | OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; | |
2063 | OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; | |
2064 | } | |
2065 | ||
e49e2767 MF |
2066 | int ocfs2_find_new_inode_loc(struct inode *dir, |
2067 | struct buffer_head *parent_fe_bh, | |
2068 | struct ocfs2_alloc_context *ac, | |
2069 | u64 *fe_blkno) | |
2070 | { | |
2071 | int ret; | |
2072 | handle_t *handle = NULL; | |
2073 | struct ocfs2_suballoc_result *res; | |
2074 | ||
2075 | BUG_ON(!ac); | |
2076 | BUG_ON(ac->ac_bits_given != 0); | |
2077 | BUG_ON(ac->ac_bits_wanted != 1); | |
2078 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
2079 | ||
2080 | res = kzalloc(sizeof(*res), GFP_NOFS); | |
2081 | if (res == NULL) { | |
2082 | ret = -ENOMEM; | |
2083 | mlog_errno(ret); | |
2084 | goto out; | |
2085 | } | |
2086 | ||
2087 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); | |
2088 | ||
2089 | /* | |
2090 | * The handle started here is for chain relink. Alternatively, | |
2091 | * we could just disable relink for these calls. | |
2092 | */ | |
2093 | handle = ocfs2_start_trans(OCFS2_SB(dir->i_sb), OCFS2_SUBALLOC_ALLOC); | |
2094 | if (IS_ERR(handle)) { | |
2095 | ret = PTR_ERR(handle); | |
2096 | handle = NULL; | |
2097 | mlog_errno(ret); | |
2098 | goto out; | |
2099 | } | |
2100 | ||
2101 | /* | |
2102 | * This will instruct ocfs2_claim_suballoc_bits and | |
2103 | * ocfs2_search_one_group to search but save actual allocation | |
2104 | * for later. | |
2105 | */ | |
2106 | ac->ac_find_loc_only = 1; | |
2107 | ||
2108 | ret = ocfs2_claim_suballoc_bits(ac, handle, 1, 1, res); | |
2109 | if (ret < 0) { | |
2110 | mlog_errno(ret); | |
2111 | goto out; | |
2112 | } | |
2113 | ||
2114 | ac->ac_find_loc_priv = res; | |
2115 | *fe_blkno = res->sr_blkno; | |
6fdb702d | 2116 | ocfs2_update_inode_fsync_trans(handle, dir, 0); |
e49e2767 MF |
2117 | out: |
2118 | if (handle) | |
2119 | ocfs2_commit_trans(OCFS2_SB(dir->i_sb), handle); | |
2120 | ||
2121 | if (ret) | |
2122 | kfree(res); | |
2123 | ||
2124 | return ret; | |
2125 | } | |
2126 | ||
2127 | int ocfs2_claim_new_inode_at_loc(handle_t *handle, | |
2128 | struct inode *dir, | |
2129 | struct ocfs2_alloc_context *ac, | |
2130 | u64 *suballoc_loc, | |
2131 | u16 *suballoc_bit, | |
2132 | u64 di_blkno) | |
2133 | { | |
2134 | int ret; | |
2135 | u16 chain; | |
2136 | struct ocfs2_suballoc_result *res = ac->ac_find_loc_priv; | |
2137 | struct buffer_head *bg_bh = NULL; | |
2138 | struct ocfs2_group_desc *bg; | |
2139 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
2140 | ||
2141 | /* | |
2142 | * Since di_blkno is being passed back in, we check for any | |
2143 | * inconsistencies which may have happened between | |
2144 | * calls. These are code bugs as di_blkno is not expected to | |
2145 | * change once returned from ocfs2_find_new_inode_loc() | |
2146 | */ | |
2147 | BUG_ON(res->sr_blkno != di_blkno); | |
2148 | ||
2149 | ret = ocfs2_read_group_descriptor(ac->ac_inode, di, | |
2150 | res->sr_bg_stable_blkno, &bg_bh); | |
2151 | if (ret) { | |
2152 | mlog_errno(ret); | |
2153 | goto out; | |
2154 | } | |
2155 | ||
2156 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
2157 | chain = le16_to_cpu(bg->bg_chain); | |
2158 | ||
2159 | ret = ocfs2_alloc_dinode_update_counts(ac->ac_inode, handle, | |
2160 | ac->ac_bh, res->sr_bits, | |
2161 | chain); | |
2162 | if (ret) { | |
2163 | mlog_errno(ret); | |
2164 | goto out; | |
2165 | } | |
2166 | ||
2167 | ret = ocfs2_block_group_set_bits(handle, | |
2168 | ac->ac_inode, | |
2169 | bg, | |
2170 | bg_bh, | |
2171 | res->sr_bit_offset, | |
2172 | res->sr_bits); | |
2173 | if (ret < 0) { | |
db66c715 YL |
2174 | ocfs2_rollback_alloc_dinode_counts(ac->ac_inode, |
2175 | ac->ac_bh, res->sr_bits, chain); | |
e49e2767 MF |
2176 | mlog_errno(ret); |
2177 | goto out; | |
2178 | } | |
2179 | ||
2f73e135 TM |
2180 | trace_ocfs2_claim_new_inode_at_loc((unsigned long long)di_blkno, |
2181 | res->sr_bits); | |
e49e2767 MF |
2182 | |
2183 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); | |
2184 | ||
2185 | BUG_ON(res->sr_bits != 1); | |
2186 | ||
2187 | *suballoc_loc = res->sr_bg_blkno; | |
2188 | *suballoc_bit = res->sr_bit_offset; | |
2189 | ac->ac_bits_given++; | |
2190 | ocfs2_save_inode_ac_group(dir, ac); | |
2191 | ||
2192 | out: | |
2193 | brelse(bg_bh); | |
2194 | ||
2195 | return ret; | |
2196 | } | |
2197 | ||
1ed9b777 | 2198 | int ocfs2_claim_new_inode(handle_t *handle, |
13821151 TM |
2199 | struct inode *dir, |
2200 | struct buffer_head *parent_fe_bh, | |
ccd979bd | 2201 | struct ocfs2_alloc_context *ac, |
2b6cb576 | 2202 | u64 *suballoc_loc, |
ccd979bd MF |
2203 | u16 *suballoc_bit, |
2204 | u64 *fe_blkno) | |
2205 | { | |
2206 | int status; | |
2b6cb576 | 2207 | struct ocfs2_suballoc_result res; |
ccd979bd | 2208 | |
ccd979bd MF |
2209 | BUG_ON(!ac); |
2210 | BUG_ON(ac->ac_bits_given != 0); | |
2211 | BUG_ON(ac->ac_bits_wanted != 1); | |
2212 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
ccd979bd | 2213 | |
13821151 TM |
2214 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); |
2215 | ||
aa8f8e93 | 2216 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2217 | handle, |
ccd979bd MF |
2218 | 1, |
2219 | 1, | |
7d1fe093 | 2220 | &res); |
ccd979bd MF |
2221 | if (status < 0) { |
2222 | mlog_errno(status); | |
2223 | goto bail; | |
2224 | } | |
1ed9b777 | 2225 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2226 | |
7d1fe093 | 2227 | BUG_ON(res.sr_bits != 1); |
ccd979bd | 2228 | |
2b6cb576 | 2229 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2230 | *suballoc_bit = res.sr_bit_offset; |
ba206635 | 2231 | *fe_blkno = res.sr_blkno; |
ccd979bd | 2232 | ac->ac_bits_given++; |
13821151 | 2233 | ocfs2_save_inode_ac_group(dir, ac); |
ccd979bd MF |
2234 | status = 0; |
2235 | bail: | |
c1e8d35e TM |
2236 | if (status) |
2237 | mlog_errno(status); | |
ccd979bd MF |
2238 | return status; |
2239 | } | |
2240 | ||
2241 | /* translate a group desc. blkno and it's bitmap offset into | |
2242 | * disk cluster offset. */ | |
2243 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, | |
2244 | u64 bg_blkno, | |
2245 | u16 bg_bit_off) | |
2246 | { | |
2247 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2248 | u32 cluster = 0; | |
2249 | ||
2250 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2251 | ||
2252 | if (bg_blkno != osb->first_cluster_group_blkno) | |
2253 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); | |
2254 | cluster += (u32) bg_bit_off; | |
2255 | return cluster; | |
2256 | } | |
2257 | ||
2258 | /* given a cluster offset, calculate which block group it belongs to | |
2259 | * and return that block offset. */ | |
d659072f | 2260 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
ccd979bd MF |
2261 | { |
2262 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2263 | u32 group_no; | |
2264 | ||
2265 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2266 | ||
2267 | group_no = cluster / osb->bitmap_cpg; | |
2268 | if (!group_no) | |
2269 | return osb->first_cluster_group_blkno; | |
2270 | return ocfs2_clusters_to_blocks(inode->i_sb, | |
2271 | group_no * osb->bitmap_cpg); | |
2272 | } | |
2273 | ||
2274 | /* given the block number of a cluster start, calculate which cluster | |
2275 | * group and descriptor bitmap offset that corresponds to. */ | |
2276 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, | |
2277 | u64 data_blkno, | |
2278 | u64 *bg_blkno, | |
2279 | u16 *bg_bit_off) | |
2280 | { | |
2281 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2282 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); | |
2283 | ||
2284 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2285 | ||
2286 | *bg_blkno = ocfs2_which_cluster_group(inode, | |
2287 | data_cluster); | |
2288 | ||
2289 | if (*bg_blkno == osb->first_cluster_group_blkno) | |
2290 | *bg_bit_off = (u16) data_cluster; | |
2291 | else | |
2292 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, | |
2293 | data_blkno - *bg_blkno); | |
2294 | } | |
2295 | ||
2296 | /* | |
2297 | * min_bits - minimum contiguous chunk from this total allocation we | |
2298 | * can handle. set to what we asked for originally for a full | |
2299 | * contig. allocation, set to '1' to indicate we can deal with extents | |
2300 | * of any size. | |
2301 | */ | |
1ed9b777 | 2302 | int __ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2303 | struct ocfs2_alloc_context *ac, |
2304 | u32 min_clusters, | |
2305 | u32 max_clusters, | |
2306 | u32 *cluster_start, | |
2307 | u32 *num_clusters) | |
ccd979bd MF |
2308 | { |
2309 | int status; | |
415cb800 | 2310 | unsigned int bits_wanted = max_clusters; |
ba206635 | 2311 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
1ed9b777 | 2312 | struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); |
ccd979bd | 2313 | |
ccd979bd MF |
2314 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
2315 | ||
2316 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL | |
2317 | && ac->ac_which != OCFS2_AC_USE_MAIN); | |
ccd979bd MF |
2318 | |
2319 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { | |
33d5d380 MF |
2320 | WARN_ON(min_clusters > 1); |
2321 | ||
ccd979bd MF |
2322 | status = ocfs2_claim_local_alloc_bits(osb, |
2323 | handle, | |
2324 | ac, | |
2325 | bits_wanted, | |
2326 | cluster_start, | |
2327 | num_clusters); | |
2328 | if (!status) | |
2329 | atomic_inc(&osb->alloc_stats.local_data); | |
2330 | } else { | |
2331 | if (min_clusters > (osb->bitmap_cpg - 1)) { | |
2332 | /* The only paths asking for contiguousness | |
2333 | * should know about this already. */ | |
2fbe8d1e SM |
2334 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
2335 | "group bitmap size %u!\n", min_clusters, | |
2336 | osb->bitmap_cpg); | |
ccd979bd MF |
2337 | status = -ENOSPC; |
2338 | goto bail; | |
2339 | } | |
2340 | /* clamp the current request down to a realistic size. */ | |
2341 | if (bits_wanted > (osb->bitmap_cpg - 1)) | |
2342 | bits_wanted = osb->bitmap_cpg - 1; | |
2343 | ||
aa8f8e93 | 2344 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2345 | handle, |
ccd979bd MF |
2346 | bits_wanted, |
2347 | min_clusters, | |
7d1fe093 | 2348 | &res); |
ccd979bd | 2349 | if (!status) { |
ba206635 | 2350 | BUG_ON(res.sr_blkno); /* cluster alloc can't set */ |
ccd979bd MF |
2351 | *cluster_start = |
2352 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, | |
7d1fe093 JB |
2353 | res.sr_bg_blkno, |
2354 | res.sr_bit_offset); | |
ccd979bd | 2355 | atomic_inc(&osb->alloc_stats.bitmap_data); |
4711954e | 2356 | *num_clusters = res.sr_bits; |
ccd979bd MF |
2357 | } |
2358 | } | |
2359 | if (status < 0) { | |
2360 | if (status != -ENOSPC) | |
2361 | mlog_errno(status); | |
2362 | goto bail; | |
2363 | } | |
2364 | ||
4711954e | 2365 | ac->ac_bits_given += *num_clusters; |
ccd979bd MF |
2366 | |
2367 | bail: | |
c1e8d35e TM |
2368 | if (status) |
2369 | mlog_errno(status); | |
ccd979bd MF |
2370 | return status; |
2371 | } | |
2372 | ||
1ed9b777 | 2373 | int ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2374 | struct ocfs2_alloc_context *ac, |
2375 | u32 min_clusters, | |
2376 | u32 *cluster_start, | |
2377 | u32 *num_clusters) | |
2378 | { | |
2379 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; | |
2380 | ||
1ed9b777 | 2381 | return __ocfs2_claim_clusters(handle, ac, min_clusters, |
415cb800 MF |
2382 | bits_wanted, cluster_start, num_clusters); |
2383 | } | |
2384 | ||
b4414eea MF |
2385 | static int ocfs2_block_group_clear_bits(handle_t *handle, |
2386 | struct inode *alloc_inode, | |
2387 | struct ocfs2_group_desc *bg, | |
2388 | struct buffer_head *group_bh, | |
2389 | unsigned int bit_off, | |
2390 | unsigned int num_bits, | |
2391 | void (*undo_fn)(unsigned int bit, | |
2392 | unsigned long *bmap)) | |
ccd979bd MF |
2393 | { |
2394 | int status; | |
2395 | unsigned int tmp; | |
ccd979bd MF |
2396 | struct ocfs2_group_desc *undo_bg = NULL; |
2397 | ||
42035306 JB |
2398 | /* The caller got this descriptor from |
2399 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
2400 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd | 2401 | |
2f73e135 | 2402 | trace_ocfs2_block_group_clear_bits(bit_off, num_bits); |
ccd979bd | 2403 | |
b4414eea | 2404 | BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); |
0cf2f763 | 2405 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
b4414eea MF |
2406 | group_bh, |
2407 | undo_fn ? | |
2408 | OCFS2_JOURNAL_ACCESS_UNDO : | |
2409 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2410 | if (status < 0) { |
2411 | mlog_errno(status); | |
2412 | goto bail; | |
2413 | } | |
2414 | ||
b4414eea | 2415 | if (undo_fn) { |
94e41ecf SM |
2416 | jbd_lock_bh_state(group_bh); |
2417 | undo_bg = (struct ocfs2_group_desc *) | |
2418 | bh2jh(group_bh)->b_committed_data; | |
2419 | BUG_ON(!undo_bg); | |
2420 | } | |
ccd979bd MF |
2421 | |
2422 | tmp = num_bits; | |
2423 | while(tmp--) { | |
2424 | ocfs2_clear_bit((bit_off + tmp), | |
2425 | (unsigned long *) bg->bg_bitmap); | |
b4414eea MF |
2426 | if (undo_fn) |
2427 | undo_fn(bit_off + tmp, | |
2428 | (unsigned long *) undo_bg->bg_bitmap); | |
ccd979bd MF |
2429 | } |
2430 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); | |
9b5cd10e SE |
2431 | if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { |
2432 | ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit" | |
2433 | " count %u but claims %u are freed. num_bits %d", | |
2434 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
2435 | le16_to_cpu(bg->bg_bits), | |
2436 | le16_to_cpu(bg->bg_free_bits_count), num_bits); | |
2437 | return -EROFS; | |
2438 | } | |
ccd979bd | 2439 | |
b4414eea | 2440 | if (undo_fn) |
94e41ecf SM |
2441 | jbd_unlock_bh_state(group_bh); |
2442 | ||
ec20cec7 | 2443 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
2444 | bail: |
2445 | return status; | |
2446 | } | |
2447 | ||
2448 | /* | |
2449 | * expects the suballoc inode to already be locked. | |
2450 | */ | |
b4414eea MF |
2451 | static int _ocfs2_free_suballoc_bits(handle_t *handle, |
2452 | struct inode *alloc_inode, | |
2453 | struct buffer_head *alloc_bh, | |
2454 | unsigned int start_bit, | |
2455 | u64 bg_blkno, | |
2456 | unsigned int count, | |
2457 | void (*undo_fn)(unsigned int bit, | |
2458 | unsigned long *bitmap)) | |
ccd979bd MF |
2459 | { |
2460 | int status = 0; | |
2461 | u32 tmp_used; | |
ccd979bd MF |
2462 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; |
2463 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; | |
2464 | struct buffer_head *group_bh = NULL; | |
2465 | struct ocfs2_group_desc *group; | |
2466 | ||
10995aa2 JB |
2467 | /* The alloc_bh comes from ocfs2_free_dinode() or |
2468 | * ocfs2_free_clusters(). The callers have all locked the | |
2469 | * allocator and gotten alloc_bh from the lock call. This | |
25985edc | 2470 | * validates the dinode buffer. Any corruption that has happened |
10995aa2 JB |
2471 | * is a code bug. */ |
2472 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
ccd979bd MF |
2473 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); |
2474 | ||
2f73e135 TM |
2475 | trace_ocfs2_free_suballoc_bits( |
2476 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, | |
2477 | (unsigned long long)bg_blkno, | |
2478 | start_bit, count); | |
ccd979bd | 2479 | |
68f64d47 JB |
2480 | status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, |
2481 | &group_bh); | |
ccd979bd MF |
2482 | if (status < 0) { |
2483 | mlog_errno(status); | |
2484 | goto bail; | |
2485 | } | |
ccd979bd | 2486 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
68f64d47 | 2487 | |
ccd979bd MF |
2488 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); |
2489 | ||
2490 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, | |
2491 | group, group_bh, | |
b4414eea | 2492 | start_bit, count, undo_fn); |
ccd979bd MF |
2493 | if (status < 0) { |
2494 | mlog_errno(status); | |
2495 | goto bail; | |
2496 | } | |
2497 | ||
0cf2f763 JB |
2498 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
2499 | alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2500 | if (status < 0) { |
2501 | mlog_errno(status); | |
2502 | goto bail; | |
2503 | } | |
2504 | ||
2505 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, | |
2506 | count); | |
2507 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
2508 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); | |
ec20cec7 | 2509 | ocfs2_journal_dirty(handle, alloc_bh); |
ccd979bd MF |
2510 | |
2511 | bail: | |
a81cb88b | 2512 | brelse(group_bh); |
ccd979bd | 2513 | |
c1e8d35e TM |
2514 | if (status) |
2515 | mlog_errno(status); | |
ccd979bd MF |
2516 | return status; |
2517 | } | |
2518 | ||
b4414eea MF |
2519 | int ocfs2_free_suballoc_bits(handle_t *handle, |
2520 | struct inode *alloc_inode, | |
2521 | struct buffer_head *alloc_bh, | |
2522 | unsigned int start_bit, | |
2523 | u64 bg_blkno, | |
2524 | unsigned int count) | |
2525 | { | |
2526 | return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, | |
2527 | start_bit, bg_blkno, count, NULL); | |
2528 | } | |
2529 | ||
1fabe148 | 2530 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
2531 | struct inode *inode_alloc_inode, |
2532 | struct buffer_head *inode_alloc_bh, | |
2533 | struct ocfs2_dinode *di) | |
2534 | { | |
2535 | u64 blk = le64_to_cpu(di->i_blkno); | |
2536 | u16 bit = le16_to_cpu(di->i_suballoc_bit); | |
2537 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2538 | ||
74380c47 TM |
2539 | if (di->i_suballoc_loc) |
2540 | bg_blkno = le64_to_cpu(di->i_suballoc_loc); | |
ccd979bd MF |
2541 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, |
2542 | inode_alloc_bh, bit, bg_blkno, 1); | |
2543 | } | |
2544 | ||
b4414eea MF |
2545 | static int _ocfs2_free_clusters(handle_t *handle, |
2546 | struct inode *bitmap_inode, | |
2547 | struct buffer_head *bitmap_bh, | |
2548 | u64 start_blk, | |
2549 | unsigned int num_clusters, | |
2550 | void (*undo_fn)(unsigned int bit, | |
2551 | unsigned long *bitmap)) | |
ccd979bd MF |
2552 | { |
2553 | int status; | |
2554 | u16 bg_start_bit; | |
2555 | u64 bg_blkno; | |
2556 | struct ocfs2_dinode *fe; | |
2557 | ||
2558 | /* You can't ever have a contiguous set of clusters | |
2559 | * bigger than a block group bitmap so we never have to worry | |
ef6b689b TM |
2560 | * about looping on them. |
2561 | * This is expensive. We can safely remove once this stuff has | |
ccd979bd MF |
2562 | * gotten tested really well. */ |
2563 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, ocfs2_blocks_to_clusters(bitmap_inode->i_sb, start_blk))); | |
2564 | ||
2565 | fe = (struct ocfs2_dinode *) bitmap_bh->b_data; | |
2566 | ||
2567 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, | |
2568 | &bg_start_bit); | |
2569 | ||
2f73e135 TM |
2570 | trace_ocfs2_free_clusters((unsigned long long)bg_blkno, |
2571 | (unsigned long long)start_blk, | |
2572 | bg_start_bit, num_clusters); | |
ccd979bd | 2573 | |
b4414eea MF |
2574 | status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, |
2575 | bg_start_bit, bg_blkno, | |
2576 | num_clusters, undo_fn); | |
9c7af40b | 2577 | if (status < 0) { |
ccd979bd | 2578 | mlog_errno(status); |
9c7af40b MF |
2579 | goto out; |
2580 | } | |
2581 | ||
2582 | ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), | |
2583 | num_clusters); | |
ccd979bd | 2584 | |
9c7af40b | 2585 | out: |
c1e8d35e TM |
2586 | if (status) |
2587 | mlog_errno(status); | |
ccd979bd MF |
2588 | return status; |
2589 | } | |
2590 | ||
b4414eea MF |
2591 | int ocfs2_free_clusters(handle_t *handle, |
2592 | struct inode *bitmap_inode, | |
2593 | struct buffer_head *bitmap_bh, | |
2594 | u64 start_blk, | |
2595 | unsigned int num_clusters) | |
2596 | { | |
2597 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2598 | start_blk, num_clusters, | |
2599 | _ocfs2_set_bit); | |
2600 | } | |
2601 | ||
2602 | /* | |
2603 | * Give never-used clusters back to the global bitmap. We don't need | |
2604 | * to protect these bits in the undo buffer. | |
2605 | */ | |
2606 | int ocfs2_release_clusters(handle_t *handle, | |
2607 | struct inode *bitmap_inode, | |
2608 | struct buffer_head *bitmap_bh, | |
2609 | u64 start_blk, | |
2610 | unsigned int num_clusters) | |
2611 | { | |
2612 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2613 | start_blk, num_clusters, | |
2614 | _ocfs2_clear_bit); | |
2615 | } | |
2616 | ||
ccd979bd MF |
2617 | static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg) |
2618 | { | |
2619 | printk("Block Group:\n"); | |
2620 | printk("bg_signature: %s\n", bg->bg_signature); | |
2621 | printk("bg_size: %u\n", bg->bg_size); | |
2622 | printk("bg_bits: %u\n", bg->bg_bits); | |
2623 | printk("bg_free_bits_count: %u\n", bg->bg_free_bits_count); | |
2624 | printk("bg_chain: %u\n", bg->bg_chain); | |
2625 | printk("bg_generation: %u\n", le32_to_cpu(bg->bg_generation)); | |
b0697053 MF |
2626 | printk("bg_next_group: %llu\n", |
2627 | (unsigned long long)bg->bg_next_group); | |
2628 | printk("bg_parent_dinode: %llu\n", | |
2629 | (unsigned long long)bg->bg_parent_dinode); | |
2630 | printk("bg_blkno: %llu\n", | |
2631 | (unsigned long long)bg->bg_blkno); | |
ccd979bd MF |
2632 | } |
2633 | ||
2634 | static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe) | |
2635 | { | |
2636 | int i; | |
2637 | ||
b0697053 | 2638 | printk("Suballoc Inode %llu:\n", (unsigned long long)fe->i_blkno); |
ccd979bd | 2639 | printk("i_signature: %s\n", fe->i_signature); |
b0697053 MF |
2640 | printk("i_size: %llu\n", |
2641 | (unsigned long long)fe->i_size); | |
ccd979bd MF |
2642 | printk("i_clusters: %u\n", fe->i_clusters); |
2643 | printk("i_generation: %u\n", | |
2644 | le32_to_cpu(fe->i_generation)); | |
2645 | printk("id1.bitmap1.i_used: %u\n", | |
2646 | le32_to_cpu(fe->id1.bitmap1.i_used)); | |
2647 | printk("id1.bitmap1.i_total: %u\n", | |
2648 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
2649 | printk("id2.i_chain.cl_cpg: %u\n", fe->id2.i_chain.cl_cpg); | |
2650 | printk("id2.i_chain.cl_bpc: %u\n", fe->id2.i_chain.cl_bpc); | |
2651 | printk("id2.i_chain.cl_count: %u\n", fe->id2.i_chain.cl_count); | |
2652 | printk("id2.i_chain.cl_next_free_rec: %u\n", | |
2653 | fe->id2.i_chain.cl_next_free_rec); | |
2654 | for(i = 0; i < fe->id2.i_chain.cl_next_free_rec; i++) { | |
2655 | printk("fe->id2.i_chain.cl_recs[%d].c_free: %u\n", i, | |
2656 | fe->id2.i_chain.cl_recs[i].c_free); | |
2657 | printk("fe->id2.i_chain.cl_recs[%d].c_total: %u\n", i, | |
2658 | fe->id2.i_chain.cl_recs[i].c_total); | |
b0697053 MF |
2659 | printk("fe->id2.i_chain.cl_recs[%d].c_blkno: %llu\n", i, |
2660 | (unsigned long long)fe->id2.i_chain.cl_recs[i].c_blkno); | |
ccd979bd MF |
2661 | } |
2662 | } | |
e7d4cb6b TM |
2663 | |
2664 | /* | |
2665 | * For a given allocation, determine which allocators will need to be | |
2666 | * accessed, and lock them, reserving the appropriate number of bits. | |
2667 | * | |
2668 | * Sparse file systems call this from ocfs2_write_begin_nolock() | |
2669 | * and ocfs2_allocate_unwritten_extents(). | |
2670 | * | |
2671 | * File systems which don't support holes call this from | |
2672 | * ocfs2_extend_allocation(). | |
2673 | */ | |
f99b9b7c JB |
2674 | int ocfs2_lock_allocators(struct inode *inode, |
2675 | struct ocfs2_extent_tree *et, | |
e7d4cb6b TM |
2676 | u32 clusters_to_add, u32 extents_to_split, |
2677 | struct ocfs2_alloc_context **data_ac, | |
f99b9b7c | 2678 | struct ocfs2_alloc_context **meta_ac) |
e7d4cb6b TM |
2679 | { |
2680 | int ret = 0, num_free_extents; | |
2681 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; | |
2682 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2683 | ||
2684 | *meta_ac = NULL; | |
2685 | if (data_ac) | |
2686 | *data_ac = NULL; | |
2687 | ||
2688 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); | |
2689 | ||
3d03a305 | 2690 | num_free_extents = ocfs2_num_free_extents(osb, et); |
e7d4cb6b TM |
2691 | if (num_free_extents < 0) { |
2692 | ret = num_free_extents; | |
2693 | mlog_errno(ret); | |
2694 | goto out; | |
2695 | } | |
2696 | ||
2697 | /* | |
2698 | * Sparse allocation file systems need to be more conservative | |
2699 | * with reserving room for expansion - the actual allocation | |
2700 | * happens while we've got a journal handle open so re-taking | |
2701 | * a cluster lock (because we ran out of room for another | |
2702 | * extent) will violate ordering rules. | |
2703 | * | |
2704 | * Most of the time we'll only be seeing this 1 cluster at a time | |
2705 | * anyway. | |
2706 | * | |
2707 | * Always lock for any unwritten extents - we might want to | |
2708 | * add blocks during a split. | |
2709 | */ | |
2710 | if (!num_free_extents || | |
2711 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { | |
f99b9b7c | 2712 | ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); |
e7d4cb6b TM |
2713 | if (ret < 0) { |
2714 | if (ret != -ENOSPC) | |
2715 | mlog_errno(ret); | |
2716 | goto out; | |
2717 | } | |
2718 | } | |
2719 | ||
2720 | if (clusters_to_add == 0) | |
2721 | goto out; | |
2722 | ||
2723 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); | |
2724 | if (ret < 0) { | |
2725 | if (ret != -ENOSPC) | |
2726 | mlog_errno(ret); | |
2727 | goto out; | |
2728 | } | |
2729 | ||
2730 | out: | |
2731 | if (ret) { | |
2732 | if (*meta_ac) { | |
2733 | ocfs2_free_alloc_context(*meta_ac); | |
2734 | *meta_ac = NULL; | |
2735 | } | |
2736 | ||
2737 | /* | |
2738 | * We cannot have an error and a non null *data_ac. | |
2739 | */ | |
2740 | } | |
2741 | ||
2742 | return ret; | |
2743 | } | |
6ca497a8 | 2744 | |
2745 | /* | |
2746 | * Read the inode specified by blkno to get suballoc_slot and | |
2747 | * suballoc_bit. | |
2748 | */ | |
2749 | static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, | |
889f004a TM |
2750 | u16 *suballoc_slot, u64 *group_blkno, |
2751 | u16 *suballoc_bit) | |
6ca497a8 | 2752 | { |
2753 | int status; | |
2754 | struct buffer_head *inode_bh = NULL; | |
2755 | struct ocfs2_dinode *inode_fe; | |
2756 | ||
2f73e135 | 2757 | trace_ocfs2_get_suballoc_slot_bit((unsigned long long)blkno); |
6ca497a8 | 2758 | |
2759 | /* dirty read disk */ | |
2760 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); | |
2761 | if (status < 0) { | |
5b09b507 JB |
2762 | mlog(ML_ERROR, "read block %llu failed %d\n", |
2763 | (unsigned long long)blkno, status); | |
6ca497a8 | 2764 | goto bail; |
2765 | } | |
2766 | ||
2767 | inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; | |
2768 | if (!OCFS2_IS_VALID_DINODE(inode_fe)) { | |
5b09b507 JB |
2769 | mlog(ML_ERROR, "invalid inode %llu requested\n", |
2770 | (unsigned long long)blkno); | |
6ca497a8 | 2771 | status = -EINVAL; |
2772 | goto bail; | |
2773 | } | |
2774 | ||
0fba8137 | 2775 | if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && |
6ca497a8 | 2776 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { |
2777 | mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", | |
5b09b507 JB |
2778 | (unsigned long long)blkno, |
2779 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); | |
6ca497a8 | 2780 | status = -EINVAL; |
2781 | goto bail; | |
2782 | } | |
2783 | ||
2784 | if (suballoc_slot) | |
2785 | *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); | |
2786 | if (suballoc_bit) | |
2787 | *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); | |
889f004a TM |
2788 | if (group_blkno) |
2789 | *group_blkno = le64_to_cpu(inode_fe->i_suballoc_loc); | |
6ca497a8 | 2790 | |
2791 | bail: | |
2792 | brelse(inode_bh); | |
2793 | ||
c1e8d35e TM |
2794 | if (status) |
2795 | mlog_errno(status); | |
6ca497a8 | 2796 | return status; |
2797 | } | |
2798 | ||
2799 | /* | |
2800 | * test whether bit is SET in allocator bitmap or not. on success, 0 | |
2801 | * is returned and *res is 1 for SET; 0 otherwise. when fails, errno | |
2802 | * is returned and *res is meaningless. Call this after you have | |
2803 | * cluster locked against suballoc, or you may get a result based on | |
2804 | * non-up2date contents | |
2805 | */ | |
2806 | static int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, | |
2807 | struct inode *suballoc, | |
889f004a TM |
2808 | struct buffer_head *alloc_bh, |
2809 | u64 group_blkno, u64 blkno, | |
6ca497a8 | 2810 | u16 bit, int *res) |
2811 | { | |
abf1b3cb | 2812 | struct ocfs2_dinode *alloc_di; |
6ca497a8 | 2813 | struct ocfs2_group_desc *group; |
2814 | struct buffer_head *group_bh = NULL; | |
2815 | u64 bg_blkno; | |
2816 | int status; | |
2817 | ||
2f73e135 TM |
2818 | trace_ocfs2_test_suballoc_bit((unsigned long long)blkno, |
2819 | (unsigned int)bit); | |
6ca497a8 | 2820 | |
abf1b3cb TM |
2821 | alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data; |
2822 | if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) { | |
6ca497a8 | 2823 | mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", |
2824 | (unsigned int)bit, | |
abf1b3cb | 2825 | ocfs2_bits_per_group(&alloc_di->id2.i_chain)); |
6ca497a8 | 2826 | status = -EINVAL; |
2827 | goto bail; | |
2828 | } | |
2829 | ||
889f004a TM |
2830 | bg_blkno = group_blkno ? group_blkno : |
2831 | ocfs2_which_suballoc_group(blkno, bit); | |
abf1b3cb | 2832 | status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno, |
6ca497a8 | 2833 | &group_bh); |
2834 | if (status < 0) { | |
5b09b507 JB |
2835 | mlog(ML_ERROR, "read group %llu failed %d\n", |
2836 | (unsigned long long)bg_blkno, status); | |
6ca497a8 | 2837 | goto bail; |
2838 | } | |
2839 | ||
2840 | group = (struct ocfs2_group_desc *) group_bh->b_data; | |
2841 | *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); | |
2842 | ||
2843 | bail: | |
2844 | brelse(group_bh); | |
2845 | ||
c1e8d35e TM |
2846 | if (status) |
2847 | mlog_errno(status); | |
6ca497a8 | 2848 | return status; |
2849 | } | |
2850 | ||
2851 | /* | |
2852 | * Test if the bit representing this inode (blkno) is set in the | |
2853 | * suballocator. | |
2854 | * | |
2855 | * On success, 0 is returned and *res is 1 for SET; 0 otherwise. | |
2856 | * | |
2857 | * In the event of failure, a negative value is returned and *res is | |
2858 | * meaningless. | |
2859 | * | |
2860 | * Callers must make sure to hold nfs_sync_lock to prevent | |
2861 | * ocfs2_delete_inode() on another node from accessing the same | |
2862 | * suballocator concurrently. | |
2863 | */ | |
2864 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) | |
2865 | { | |
2866 | int status; | |
889f004a | 2867 | u64 group_blkno = 0; |
6ca497a8 | 2868 | u16 suballoc_bit = 0, suballoc_slot = 0; |
2869 | struct inode *inode_alloc_inode; | |
2870 | struct buffer_head *alloc_bh = NULL; | |
2871 | ||
2f73e135 | 2872 | trace_ocfs2_test_inode_bit((unsigned long long)blkno); |
6ca497a8 | 2873 | |
2874 | status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, | |
889f004a | 2875 | &group_blkno, &suballoc_bit); |
6ca497a8 | 2876 | if (status < 0) { |
2877 | mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); | |
2878 | goto bail; | |
2879 | } | |
2880 | ||
2881 | inode_alloc_inode = | |
2882 | ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, | |
2883 | suballoc_slot); | |
2884 | if (!inode_alloc_inode) { | |
2885 | /* the error code could be inaccurate, but we are not able to | |
2886 | * get the correct one. */ | |
2887 | status = -EINVAL; | |
2888 | mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", | |
2889 | (u32)suballoc_slot); | |
2890 | goto bail; | |
2891 | } | |
2892 | ||
2893 | mutex_lock(&inode_alloc_inode->i_mutex); | |
2894 | status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); | |
2895 | if (status < 0) { | |
2896 | mutex_unlock(&inode_alloc_inode->i_mutex); | |
7dc3e839 | 2897 | iput(inode_alloc_inode); |
6ca497a8 | 2898 | mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", |
2899 | (u32)suballoc_slot, status); | |
2900 | goto bail; | |
2901 | } | |
2902 | ||
2903 | status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, | |
889f004a | 2904 | group_blkno, blkno, suballoc_bit, res); |
6ca497a8 | 2905 | if (status < 0) |
2906 | mlog(ML_ERROR, "test suballoc bit failed %d\n", status); | |
2907 | ||
2908 | ocfs2_inode_unlock(inode_alloc_inode, 0); | |
2909 | mutex_unlock(&inode_alloc_inode->i_mutex); | |
2910 | ||
2911 | iput(inode_alloc_inode); | |
2912 | brelse(alloc_bh); | |
2913 | bail: | |
c1e8d35e TM |
2914 | if (status) |
2915 | mlog_errno(status); | |
6ca497a8 | 2916 | return status; |
2917 | } |