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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 | 82 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); |
1fabe148 | 83 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
84 | struct inode *alloc_inode, |
85 | struct buffer_head *bg_bh, | |
86 | u64 group_blkno, | |
798db35f | 87 | unsigned int group_clusters, |
ccd979bd MF |
88 | u16 my_chain, |
89 | struct ocfs2_chain_list *cl); | |
90 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
91 | struct inode *alloc_inode, | |
1187c968 | 92 | struct buffer_head *bh, |
60ca81e8 | 93 | u64 max_block, |
feb473a6 | 94 | u64 *last_alloc_group, |
60ca81e8 | 95 | int flags); |
ccd979bd | 96 | |
ccd979bd MF |
97 | static int ocfs2_cluster_group_search(struct inode *inode, |
98 | struct buffer_head *group_bh, | |
99 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 100 | u64 max_block, |
7d1fe093 | 101 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
102 | static int ocfs2_block_group_search(struct inode *inode, |
103 | struct buffer_head *group_bh, | |
104 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 105 | u64 max_block, |
7d1fe093 | 106 | struct ocfs2_suballoc_result *res); |
aa8f8e93 | 107 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 108 | handle_t *handle, |
ccd979bd MF |
109 | u32 bits_wanted, |
110 | u32 min_bits, | |
7d1fe093 | 111 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
112 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, |
113 | int nr); | |
1fabe148 | 114 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
115 | struct inode *alloc_inode, |
116 | struct buffer_head *fe_bh, | |
117 | struct buffer_head *bg_bh, | |
118 | struct buffer_head *prev_bg_bh, | |
119 | u16 chain); | |
120 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
121 | u32 wanted); | |
ccd979bd MF |
122 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
123 | u64 bg_blkno, | |
124 | u16 bg_bit_off); | |
ccd979bd MF |
125 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
126 | u64 data_blkno, | |
127 | u64 *bg_blkno, | |
128 | u16 *bg_bit_off); | |
1187c968 JB |
129 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
130 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 131 | int flags, |
1187c968 | 132 | struct ocfs2_alloc_context **ac); |
ccd979bd | 133 | |
9c7af40b | 134 | void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) |
ccd979bd | 135 | { |
da5cbf2f MF |
136 | struct inode *inode = ac->ac_inode; |
137 | ||
138 | if (inode) { | |
139 | if (ac->ac_which != OCFS2_AC_USE_LOCAL) | |
e63aecb6 | 140 | ocfs2_inode_unlock(inode, 1); |
da5cbf2f | 141 | |
5955102c | 142 | inode_unlock(inode); |
da5cbf2f MF |
143 | |
144 | iput(inode); | |
4d0ddb2c | 145 | ac->ac_inode = NULL; |
da5cbf2f | 146 | } |
a81cb88b MF |
147 | brelse(ac->ac_bh); |
148 | ac->ac_bh = NULL; | |
e3b4a97d | 149 | ac->ac_resv = NULL; |
46359295 JQ |
150 | kfree(ac->ac_find_loc_priv); |
151 | ac->ac_find_loc_priv = NULL; | |
4d0ddb2c TM |
152 | } |
153 | ||
154 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) | |
155 | { | |
156 | ocfs2_free_ac_resource(ac); | |
ccd979bd MF |
157 | kfree(ac); |
158 | } | |
159 | ||
160 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) | |
161 | { | |
162 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); | |
163 | } | |
164 | ||
57e3e797 | 165 | #define do_error(fmt, ...) \ |
7ecef14a JP |
166 | do { \ |
167 | if (resize) \ | |
168 | mlog(ML_ERROR, fmt, ##__VA_ARGS__); \ | |
169 | else \ | |
170 | return ocfs2_error(sb, fmt, ##__VA_ARGS__); \ | |
171 | } while (0) | |
57e3e797 | 172 | |
970e4936 JB |
173 | static int ocfs2_validate_gd_self(struct super_block *sb, |
174 | struct buffer_head *bh, | |
78c37eb0 | 175 | int resize) |
970e4936 JB |
176 | { |
177 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
178 | ||
7bf72ede | 179 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { |
7ecef14a | 180 | do_error("Group descriptor #%llu has bad signature %.*s\n", |
68f64d47 | 181 | (unsigned long long)bh->b_blocknr, 7, |
57e3e797 | 182 | gd->bg_signature); |
7bf72ede MF |
183 | } |
184 | ||
68f64d47 | 185 | if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { |
7ecef14a | 186 | do_error("Group descriptor #%llu has an invalid bg_blkno of %llu\n", |
68f64d47 JB |
187 | (unsigned long long)bh->b_blocknr, |
188 | (unsigned long long)le64_to_cpu(gd->bg_blkno)); | |
68f64d47 JB |
189 | } |
190 | ||
191 | if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { | |
7ecef14a | 192 | do_error("Group descriptor #%llu has an invalid fs_generation of #%u\n", |
68f64d47 JB |
193 | (unsigned long long)bh->b_blocknr, |
194 | le32_to_cpu(gd->bg_generation)); | |
68f64d47 JB |
195 | } |
196 | ||
970e4936 | 197 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { |
7ecef14a | 198 | do_error("Group descriptor #%llu has bit count %u but claims that %u are free\n", |
970e4936 JB |
199 | (unsigned long long)bh->b_blocknr, |
200 | le16_to_cpu(gd->bg_bits), | |
201 | le16_to_cpu(gd->bg_free_bits_count)); | |
970e4936 JB |
202 | } |
203 | ||
204 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { | |
7ecef14a | 205 | do_error("Group descriptor #%llu has bit count %u but max bitmap bits of %u\n", |
970e4936 JB |
206 | (unsigned long long)bh->b_blocknr, |
207 | le16_to_cpu(gd->bg_bits), | |
208 | 8 * le16_to_cpu(gd->bg_size)); | |
970e4936 JB |
209 | } |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | static int ocfs2_validate_gd_parent(struct super_block *sb, | |
215 | struct ocfs2_dinode *di, | |
216 | struct buffer_head *bh, | |
78c37eb0 | 217 | int resize) |
970e4936 JB |
218 | { |
219 | unsigned int max_bits; | |
220 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
221 | ||
7bf72ede | 222 | if (di->i_blkno != gd->bg_parent_dinode) { |
7ecef14a | 223 | do_error("Group descriptor #%llu has bad parent pointer (%llu, expected %llu)\n", |
68f64d47 | 224 | (unsigned long long)bh->b_blocknr, |
57e3e797 JB |
225 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), |
226 | (unsigned long long)le64_to_cpu(di->i_blkno)); | |
7bf72ede MF |
227 | } |
228 | ||
229 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); | |
230 | if (le16_to_cpu(gd->bg_bits) > max_bits) { | |
7ecef14a | 231 | do_error("Group descriptor #%llu has bit count of %u\n", |
68f64d47 | 232 | (unsigned long long)bh->b_blocknr, |
57e3e797 | 233 | le16_to_cpu(gd->bg_bits)); |
7bf72ede MF |
234 | } |
235 | ||
78c37eb0 TM |
236 | /* In resize, we may meet the case bg_chain == cl_next_free_rec. */ |
237 | if ((le16_to_cpu(gd->bg_chain) > | |
238 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) || | |
239 | ((le16_to_cpu(gd->bg_chain) == | |
240 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) && !resize)) { | |
7ecef14a | 241 | do_error("Group descriptor #%llu has bad chain %u\n", |
68f64d47 | 242 | (unsigned long long)bh->b_blocknr, |
57e3e797 | 243 | le16_to_cpu(gd->bg_chain)); |
7bf72ede MF |
244 | } |
245 | ||
970e4936 JB |
246 | return 0; |
247 | } | |
7bf72ede | 248 | |
57e3e797 | 249 | #undef do_error |
7bf72ede | 250 | |
970e4936 JB |
251 | /* |
252 | * This version only prints errors. It does not fail the filesystem, and | |
253 | * exists only for resize. | |
254 | */ | |
255 | int ocfs2_check_group_descriptor(struct super_block *sb, | |
256 | struct ocfs2_dinode *di, | |
257 | struct buffer_head *bh) | |
258 | { | |
259 | int rc; | |
d6b32bbb JB |
260 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
261 | ||
262 | BUG_ON(!buffer_uptodate(bh)); | |
970e4936 | 263 | |
d6b32bbb JB |
264 | /* |
265 | * If the ecc fails, we return the error but otherwise | |
266 | * leave the filesystem running. We know any error is | |
267 | * local to this block. | |
268 | */ | |
269 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
13723d00 JB |
270 | if (rc) { |
271 | mlog(ML_ERROR, | |
272 | "Checksum failed for group descriptor %llu\n", | |
273 | (unsigned long long)bh->b_blocknr); | |
274 | } else | |
d6b32bbb | 275 | rc = ocfs2_validate_gd_self(sb, bh, 1); |
970e4936 JB |
276 | if (!rc) |
277 | rc = ocfs2_validate_gd_parent(sb, di, bh, 1); | |
278 | ||
279 | return rc; | |
280 | } | |
281 | ||
282 | static int ocfs2_validate_group_descriptor(struct super_block *sb, | |
283 | struct buffer_head *bh) | |
284 | { | |
d6b32bbb JB |
285 | int rc; |
286 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
287 | ||
2f73e135 TM |
288 | trace_ocfs2_validate_group_descriptor( |
289 | (unsigned long long)bh->b_blocknr); | |
970e4936 | 290 | |
d6b32bbb JB |
291 | BUG_ON(!buffer_uptodate(bh)); |
292 | ||
293 | /* | |
294 | * If the ecc fails, we return the error but otherwise | |
295 | * leave the filesystem running. We know any error is | |
296 | * local to this block. | |
297 | */ | |
298 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
299 | if (rc) | |
300 | return rc; | |
301 | ||
302 | /* | |
303 | * Errors after here are fatal. | |
304 | */ | |
305 | ||
970e4936 | 306 | return ocfs2_validate_gd_self(sb, bh, 0); |
7bf72ede MF |
307 | } |
308 | ||
68f64d47 JB |
309 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, |
310 | u64 gd_blkno, struct buffer_head **bh) | |
311 | { | |
312 | int rc; | |
313 | struct buffer_head *tmp = *bh; | |
314 | ||
8cb471e8 | 315 | rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, |
970e4936 | 316 | ocfs2_validate_group_descriptor); |
68f64d47 JB |
317 | if (rc) |
318 | goto out; | |
319 | ||
970e4936 | 320 | rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); |
68f64d47 JB |
321 | if (rc) { |
322 | brelse(tmp); | |
323 | goto out; | |
324 | } | |
325 | ||
326 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
327 | if (!*bh) | |
328 | *bh = tmp; | |
329 | ||
330 | out: | |
331 | return rc; | |
332 | } | |
333 | ||
798db35f JB |
334 | static void ocfs2_bg_discontig_add_extent(struct ocfs2_super *osb, |
335 | struct ocfs2_group_desc *bg, | |
336 | struct ocfs2_chain_list *cl, | |
47dea423 | 337 | u64 p_blkno, unsigned int clusters) |
798db35f JB |
338 | { |
339 | struct ocfs2_extent_list *el = &bg->bg_list; | |
340 | struct ocfs2_extent_rec *rec; | |
341 | ||
4711954e | 342 | BUG_ON(!ocfs2_supports_discontig_bg(osb)); |
798db35f JB |
343 | if (!el->l_next_free_rec) |
344 | el->l_count = cpu_to_le16(ocfs2_extent_recs_per_gd(osb->sb)); | |
345 | rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec)]; | |
4711954e | 346 | rec->e_blkno = cpu_to_le64(p_blkno); |
798db35f JB |
347 | rec->e_cpos = cpu_to_le32(le16_to_cpu(bg->bg_bits) / |
348 | le16_to_cpu(cl->cl_bpc)); | |
47dea423 | 349 | rec->e_leaf_clusters = cpu_to_le16(clusters); |
798db35f | 350 | le16_add_cpu(&bg->bg_bits, clusters * le16_to_cpu(cl->cl_bpc)); |
4711954e TM |
351 | le16_add_cpu(&bg->bg_free_bits_count, |
352 | clusters * le16_to_cpu(cl->cl_bpc)); | |
798db35f JB |
353 | le16_add_cpu(&el->l_next_free_rec, 1); |
354 | } | |
355 | ||
1fabe148 | 356 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
357 | struct inode *alloc_inode, |
358 | struct buffer_head *bg_bh, | |
359 | u64 group_blkno, | |
798db35f | 360 | unsigned int group_clusters, |
ccd979bd MF |
361 | u16 my_chain, |
362 | struct ocfs2_chain_list *cl) | |
363 | { | |
364 | int status = 0; | |
798db35f | 365 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); |
ccd979bd MF |
366 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
367 | struct super_block * sb = alloc_inode->i_sb; | |
368 | ||
ccd979bd | 369 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { |
7ecef14a JP |
370 | status = ocfs2_error(alloc_inode->i_sb, |
371 | "group block (%llu) != b_blocknr (%llu)\n", | |
372 | (unsigned long long)group_blkno, | |
373 | (unsigned long long) bg_bh->b_blocknr); | |
ccd979bd MF |
374 | goto bail; |
375 | } | |
376 | ||
13723d00 | 377 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 378 | INODE_CACHE(alloc_inode), |
13723d00 JB |
379 | bg_bh, |
380 | OCFS2_JOURNAL_ACCESS_CREATE); | |
ccd979bd MF |
381 | if (status < 0) { |
382 | mlog_errno(status); | |
383 | goto bail; | |
384 | } | |
385 | ||
386 | memset(bg, 0, sb->s_blocksize); | |
387 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); | |
1119d3c0 | 388 | bg->bg_generation = cpu_to_le32(osb->fs_generation); |
8571882c TM |
389 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, |
390 | osb->s_feature_incompat)); | |
ccd979bd MF |
391 | bg->bg_chain = cpu_to_le16(my_chain); |
392 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; | |
393 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); | |
394 | bg->bg_blkno = cpu_to_le64(group_blkno); | |
798db35f JB |
395 | if (group_clusters == le16_to_cpu(cl->cl_cpg)) |
396 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); | |
397 | else | |
4711954e | 398 | ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, |
798db35f JB |
399 | group_clusters); |
400 | ||
ccd979bd MF |
401 | /* set the 1st bit in the bitmap to account for the descriptor block */ |
402 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); | |
403 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); | |
404 | ||
ec20cec7 | 405 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd MF |
406 | |
407 | /* There is no need to zero out or otherwise initialize the | |
408 | * other blocks in a group - All valid FS metadata in a block | |
409 | * group stores the superblock fs_generation value at | |
410 | * allocation time. */ | |
411 | ||
412 | bail: | |
c1e8d35e TM |
413 | if (status) |
414 | mlog_errno(status); | |
ccd979bd MF |
415 | return status; |
416 | } | |
417 | ||
418 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) | |
419 | { | |
420 | u16 curr, best; | |
421 | ||
422 | best = curr = 0; | |
423 | while (curr < le16_to_cpu(cl->cl_count)) { | |
424 | if (le32_to_cpu(cl->cl_recs[best].c_total) > | |
425 | le32_to_cpu(cl->cl_recs[curr].c_total)) | |
426 | best = curr; | |
427 | curr++; | |
428 | } | |
429 | return best; | |
430 | } | |
431 | ||
798db35f JB |
432 | static struct buffer_head * |
433 | ocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, | |
434 | struct inode *alloc_inode, | |
435 | struct ocfs2_alloc_context *ac, | |
436 | struct ocfs2_chain_list *cl) | |
437 | { | |
438 | int status; | |
439 | u32 bit_off, num_bits; | |
440 | u64 bg_blkno; | |
441 | struct buffer_head *bg_bh; | |
442 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
443 | ||
1ed9b777 | 444 | status = ocfs2_claim_clusters(handle, ac, |
798db35f JB |
445 | le16_to_cpu(cl->cl_cpg), &bit_off, |
446 | &num_bits); | |
447 | if (status < 0) { | |
448 | if (status != -ENOSPC) | |
449 | mlog_errno(status); | |
450 | goto bail; | |
451 | } | |
452 | ||
453 | /* setup the group */ | |
454 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
2f73e135 TM |
455 | trace_ocfs2_block_group_alloc_contig( |
456 | (unsigned long long)bg_blkno, alloc_rec); | |
798db35f JB |
457 | |
458 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
459 | if (!bg_bh) { | |
7391a294 | 460 | status = -ENOMEM; |
798db35f JB |
461 | mlog_errno(status); |
462 | goto bail; | |
463 | } | |
464 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
465 | ||
466 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
467 | bg_blkno, num_bits, alloc_rec, cl); | |
468 | if (status < 0) { | |
469 | brelse(bg_bh); | |
470 | mlog_errno(status); | |
471 | } | |
472 | ||
473 | bail: | |
474 | return status ? ERR_PTR(status) : bg_bh; | |
475 | } | |
476 | ||
477 | static int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, | |
478 | handle_t *handle, | |
479 | struct ocfs2_alloc_context *ac, | |
480 | unsigned int min_bits, | |
481 | u32 *bit_off, u32 *num_bits) | |
482 | { | |
18d3a98f | 483 | int status = 0; |
798db35f JB |
484 | |
485 | while (min_bits) { | |
1ed9b777 | 486 | status = ocfs2_claim_clusters(handle, ac, min_bits, |
798db35f JB |
487 | bit_off, num_bits); |
488 | if (status != -ENOSPC) | |
489 | break; | |
490 | ||
491 | min_bits >>= 1; | |
492 | } | |
493 | ||
494 | return status; | |
495 | } | |
496 | ||
497 | static int ocfs2_block_group_grow_discontig(handle_t *handle, | |
498 | struct inode *alloc_inode, | |
499 | struct buffer_head *bg_bh, | |
500 | struct ocfs2_alloc_context *ac, | |
501 | struct ocfs2_chain_list *cl, | |
502 | unsigned int min_bits) | |
503 | { | |
504 | int status; | |
505 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
506 | struct ocfs2_group_desc *bg = | |
507 | (struct ocfs2_group_desc *)bg_bh->b_data; | |
4711954e TM |
508 | unsigned int needed = le16_to_cpu(cl->cl_cpg) - |
509 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
510 | u32 p_cpos, clusters; |
511 | u64 p_blkno; | |
512 | struct ocfs2_extent_list *el = &bg->bg_list; | |
513 | ||
514 | status = ocfs2_journal_access_gd(handle, | |
515 | INODE_CACHE(alloc_inode), | |
516 | bg_bh, | |
517 | OCFS2_JOURNAL_ACCESS_CREATE); | |
518 | if (status < 0) { | |
519 | mlog_errno(status); | |
520 | goto bail; | |
521 | } | |
522 | ||
523 | while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < | |
524 | le16_to_cpu(el->l_count))) { | |
798db35f JB |
525 | if (min_bits > needed) |
526 | min_bits = needed; | |
527 | status = ocfs2_block_group_claim_bits(osb, handle, ac, | |
528 | min_bits, &p_cpos, | |
529 | &clusters); | |
530 | if (status < 0) { | |
531 | if (status != -ENOSPC) | |
532 | mlog_errno(status); | |
533 | goto bail; | |
534 | } | |
535 | p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); | |
536 | ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, | |
537 | clusters); | |
538 | ||
539 | min_bits = clusters; | |
4711954e TM |
540 | needed = le16_to_cpu(cl->cl_cpg) - |
541 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
542 | } |
543 | ||
544 | if (needed > 0) { | |
4711954e TM |
545 | /* |
546 | * We have used up all the extent rec but can't fill up | |
547 | * the cpg. So bail out. | |
548 | */ | |
549 | status = -ENOSPC; | |
550 | goto bail; | |
798db35f JB |
551 | } |
552 | ||
553 | ocfs2_journal_dirty(handle, bg_bh); | |
554 | ||
555 | bail: | |
556 | return status; | |
557 | } | |
558 | ||
8b06bc59 JB |
559 | static void ocfs2_bg_alloc_cleanup(handle_t *handle, |
560 | struct ocfs2_alloc_context *cluster_ac, | |
561 | struct inode *alloc_inode, | |
562 | struct buffer_head *bg_bh) | |
798db35f | 563 | { |
8b06bc59 | 564 | int i, ret; |
798db35f JB |
565 | struct ocfs2_group_desc *bg; |
566 | struct ocfs2_extent_list *el; | |
567 | struct ocfs2_extent_rec *rec; | |
568 | ||
569 | if (!bg_bh) | |
570 | return; | |
571 | ||
572 | bg = (struct ocfs2_group_desc *)bg_bh->b_data; | |
573 | el = &bg->bg_list; | |
574 | for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { | |
575 | rec = &el->l_recs[i]; | |
8b06bc59 JB |
576 | ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, |
577 | cluster_ac->ac_bh, | |
578 | le64_to_cpu(rec->e_blkno), | |
72094e43 | 579 | le16_to_cpu(rec->e_leaf_clusters)); |
8b06bc59 JB |
580 | if (ret) |
581 | mlog_errno(ret); | |
582 | /* Try all the clusters to free */ | |
798db35f JB |
583 | } |
584 | ||
585 | ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); | |
586 | brelse(bg_bh); | |
587 | } | |
588 | ||
589 | static struct buffer_head * | |
590 | ocfs2_block_group_alloc_discontig(handle_t *handle, | |
591 | struct inode *alloc_inode, | |
592 | struct ocfs2_alloc_context *ac, | |
8b06bc59 | 593 | struct ocfs2_chain_list *cl) |
798db35f JB |
594 | { |
595 | int status; | |
596 | u32 bit_off, num_bits; | |
597 | u64 bg_blkno; | |
598 | unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; | |
599 | struct buffer_head *bg_bh = NULL; | |
600 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
601 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
602 | ||
4711954e | 603 | if (!ocfs2_supports_discontig_bg(osb)) { |
798db35f JB |
604 | status = -ENOSPC; |
605 | goto bail; | |
606 | } | |
607 | ||
8b06bc59 JB |
608 | status = ocfs2_extend_trans(handle, |
609 | ocfs2_calc_bg_discontig_credits(osb->sb)); | |
610 | if (status) { | |
611 | mlog_errno(status); | |
612 | goto bail; | |
613 | } | |
614 | ||
95ec0adf JB |
615 | /* |
616 | * We're going to be grabbing from multiple cluster groups. | |
617 | * We don't have enough credits to relink them all, and the | |
618 | * cluster groups will be staying in cache for the duration of | |
619 | * this operation. | |
620 | */ | |
309a85b6 | 621 | ac->ac_disable_chain_relink = 1; |
95ec0adf | 622 | |
798db35f JB |
623 | /* Claim the first region */ |
624 | status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, | |
625 | &bit_off, &num_bits); | |
626 | if (status < 0) { | |
627 | if (status != -ENOSPC) | |
628 | mlog_errno(status); | |
629 | goto bail; | |
630 | } | |
631 | min_bits = num_bits; | |
632 | ||
633 | /* setup the group */ | |
634 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
2f73e135 TM |
635 | trace_ocfs2_block_group_alloc_discontig( |
636 | (unsigned long long)bg_blkno, alloc_rec); | |
798db35f JB |
637 | |
638 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
639 | if (!bg_bh) { | |
7391a294 | 640 | status = -ENOMEM; |
798db35f JB |
641 | mlog_errno(status); |
642 | goto bail; | |
643 | } | |
644 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
645 | ||
646 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
647 | bg_blkno, num_bits, alloc_rec, cl); | |
648 | if (status < 0) { | |
649 | mlog_errno(status); | |
650 | goto bail; | |
651 | } | |
652 | ||
653 | status = ocfs2_block_group_grow_discontig(handle, alloc_inode, | |
654 | bg_bh, ac, cl, min_bits); | |
655 | if (status) | |
656 | mlog_errno(status); | |
657 | ||
658 | bail: | |
659 | if (status) | |
8b06bc59 | 660 | ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); |
798db35f JB |
661 | return status ? ERR_PTR(status) : bg_bh; |
662 | } | |
663 | ||
ccd979bd MF |
664 | /* |
665 | * We expect the block group allocator to already be locked. | |
666 | */ | |
667 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
668 | struct inode *alloc_inode, | |
1187c968 | 669 | struct buffer_head *bh, |
60ca81e8 | 670 | u64 max_block, |
feb473a6 | 671 | u64 *last_alloc_group, |
60ca81e8 | 672 | int flags) |
ccd979bd MF |
673 | { |
674 | int status, credits; | |
675 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; | |
676 | struct ocfs2_chain_list *cl; | |
677 | struct ocfs2_alloc_context *ac = NULL; | |
1fabe148 | 678 | handle_t *handle = NULL; |
4711954e | 679 | u16 alloc_rec; |
ccd979bd MF |
680 | struct buffer_head *bg_bh = NULL; |
681 | struct ocfs2_group_desc *bg; | |
682 | ||
683 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); | |
684 | ||
ccd979bd | 685 | cl = &fe->id2.i_chain; |
1187c968 JB |
686 | status = ocfs2_reserve_clusters_with_limit(osb, |
687 | le16_to_cpu(cl->cl_cpg), | |
60ca81e8 | 688 | max_block, flags, &ac); |
ccd979bd MF |
689 | if (status < 0) { |
690 | if (status != -ENOSPC) | |
691 | mlog_errno(status); | |
692 | goto bail; | |
693 | } | |
694 | ||
695 | credits = ocfs2_calc_group_alloc_credits(osb->sb, | |
696 | le16_to_cpu(cl->cl_cpg)); | |
65eff9cc | 697 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
698 | if (IS_ERR(handle)) { |
699 | status = PTR_ERR(handle); | |
700 | handle = NULL; | |
701 | mlog_errno(status); | |
702 | goto bail; | |
703 | } | |
704 | ||
feb473a6 | 705 | if (last_alloc_group && *last_alloc_group != 0) { |
2f73e135 TM |
706 | trace_ocfs2_block_group_alloc( |
707 | (unsigned long long)*last_alloc_group); | |
feb473a6 TM |
708 | ac->ac_last_group = *last_alloc_group; |
709 | } | |
798db35f JB |
710 | |
711 | bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, | |
712 | ac, cl); | |
713 | if (IS_ERR(bg_bh) && (PTR_ERR(bg_bh) == -ENOSPC)) | |
714 | bg_bh = ocfs2_block_group_alloc_discontig(handle, | |
715 | alloc_inode, | |
8b06bc59 | 716 | ac, cl); |
798db35f JB |
717 | if (IS_ERR(bg_bh)) { |
718 | status = PTR_ERR(bg_bh); | |
719 | bg_bh = NULL; | |
ccd979bd MF |
720 | if (status != -ENOSPC) |
721 | mlog_errno(status); | |
722 | goto bail; | |
723 | } | |
ccd979bd MF |
724 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
725 | ||
0cf2f763 | 726 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
13723d00 | 727 | bh, OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
728 | if (status < 0) { |
729 | mlog_errno(status); | |
730 | goto bail; | |
731 | } | |
732 | ||
4711954e TM |
733 | alloc_rec = le16_to_cpu(bg->bg_chain); |
734 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, | |
ccd979bd | 735 | le16_to_cpu(bg->bg_free_bits_count)); |
4711954e | 736 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, |
798db35f | 737 | le16_to_cpu(bg->bg_bits)); |
0a463b74 | 738 | cl->cl_recs[alloc_rec].c_blkno = bg->bg_blkno; |
ccd979bd MF |
739 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) |
740 | le16_add_cpu(&cl->cl_next_free_rec, 1); | |
741 | ||
742 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - | |
743 | le16_to_cpu(bg->bg_free_bits_count)); | |
744 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); | |
745 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); | |
746 | ||
ec20cec7 | 747 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
748 | |
749 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); | |
750 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
751 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, | |
752 | le32_to_cpu(fe->i_clusters))); | |
753 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); | |
754 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); | |
8110b073 | 755 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
6fdb702d | 756 | ocfs2_update_inode_fsync_trans(handle, alloc_inode, 0); |
ccd979bd MF |
757 | |
758 | status = 0; | |
feb473a6 TM |
759 | |
760 | /* save the new last alloc group so that the caller can cache it. */ | |
761 | if (last_alloc_group) | |
762 | *last_alloc_group = ac->ac_last_group; | |
763 | ||
ccd979bd MF |
764 | bail: |
765 | if (handle) | |
02dc1af4 | 766 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
767 | |
768 | if (ac) | |
769 | ocfs2_free_alloc_context(ac); | |
770 | ||
a81cb88b | 771 | brelse(bg_bh); |
ccd979bd | 772 | |
c1e8d35e TM |
773 | if (status) |
774 | mlog_errno(status); | |
ccd979bd MF |
775 | return status; |
776 | } | |
777 | ||
778 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, | |
da5cbf2f MF |
779 | struct ocfs2_alloc_context *ac, |
780 | int type, | |
ffda89a3 | 781 | u32 slot, |
feb473a6 | 782 | u64 *last_alloc_group, |
60ca81e8 | 783 | int flags) |
ccd979bd MF |
784 | { |
785 | int status; | |
786 | u32 bits_wanted = ac->ac_bits_wanted; | |
da5cbf2f | 787 | struct inode *alloc_inode; |
ccd979bd | 788 | struct buffer_head *bh = NULL; |
ccd979bd MF |
789 | struct ocfs2_dinode *fe; |
790 | u32 free_bits; | |
791 | ||
da5cbf2f MF |
792 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
793 | if (!alloc_inode) { | |
794 | mlog_errno(-EINVAL); | |
795 | return -EINVAL; | |
796 | } | |
ccd979bd | 797 | |
5955102c | 798 | inode_lock(alloc_inode); |
da5cbf2f | 799 | |
e63aecb6 | 800 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
ccd979bd | 801 | if (status < 0) { |
5955102c | 802 | inode_unlock(alloc_inode); |
da5cbf2f MF |
803 | iput(alloc_inode); |
804 | ||
ccd979bd | 805 | mlog_errno(status); |
da5cbf2f | 806 | return status; |
ccd979bd MF |
807 | } |
808 | ||
da5cbf2f | 809 | ac->ac_inode = alloc_inode; |
a4a48911 | 810 | ac->ac_alloc_slot = slot; |
da5cbf2f | 811 | |
ccd979bd | 812 | fe = (struct ocfs2_dinode *) bh->b_data; |
10995aa2 JB |
813 | |
814 | /* The bh was validated by the inode read inside | |
815 | * ocfs2_inode_lock(). Any corruption is a code bug. */ | |
816 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
817 | ||
ccd979bd | 818 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { |
7ecef14a JP |
819 | status = ocfs2_error(alloc_inode->i_sb, |
820 | "Invalid chain allocator %llu\n", | |
821 | (unsigned long long)le64_to_cpu(fe->i_blkno)); | |
ccd979bd MF |
822 | goto bail; |
823 | } | |
824 | ||
825 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - | |
826 | le32_to_cpu(fe->id1.bitmap1.i_used); | |
827 | ||
828 | if (bits_wanted > free_bits) { | |
829 | /* cluster bitmap never grows */ | |
830 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { | |
2f73e135 TM |
831 | trace_ocfs2_reserve_suballoc_bits_nospc(bits_wanted, |
832 | free_bits); | |
ccd979bd MF |
833 | status = -ENOSPC; |
834 | goto bail; | |
835 | } | |
836 | ||
60ca81e8 | 837 | if (!(flags & ALLOC_NEW_GROUP)) { |
2f73e135 TM |
838 | trace_ocfs2_reserve_suballoc_bits_no_new_group( |
839 | slot, bits_wanted, free_bits); | |
ffda89a3 TM |
840 | status = -ENOSPC; |
841 | goto bail; | |
842 | } | |
843 | ||
1187c968 | 844 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh, |
feb473a6 TM |
845 | ac->ac_max_block, |
846 | last_alloc_group, flags); | |
ccd979bd MF |
847 | if (status < 0) { |
848 | if (status != -ENOSPC) | |
849 | mlog_errno(status); | |
850 | goto bail; | |
851 | } | |
852 | atomic_inc(&osb->alloc_stats.bg_extends); | |
853 | ||
854 | /* You should never ask for this much metadata */ | |
855 | BUG_ON(bits_wanted > | |
856 | (le32_to_cpu(fe->id1.bitmap1.i_total) | |
857 | - le32_to_cpu(fe->id1.bitmap1.i_used))); | |
858 | } | |
859 | ||
860 | get_bh(bh); | |
861 | ac->ac_bh = bh; | |
862 | bail: | |
a81cb88b | 863 | brelse(bh); |
ccd979bd | 864 | |
c1e8d35e TM |
865 | if (status) |
866 | mlog_errno(status); | |
ccd979bd MF |
867 | return status; |
868 | } | |
869 | ||
b89c5428 TY |
870 | static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
871 | { | |
872 | spin_lock(&osb->osb_lock); | |
873 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
874 | spin_unlock(&osb->osb_lock); | |
875 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
876 | } | |
877 | ||
878 | static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) | |
879 | { | |
880 | spin_lock(&osb->osb_lock); | |
881 | osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; | |
882 | spin_unlock(&osb->osb_lock); | |
883 | atomic_set(&osb->s_num_meta_stolen, 0); | |
884 | } | |
885 | ||
886 | void ocfs2_init_steal_slots(struct ocfs2_super *osb) | |
887 | { | |
888 | ocfs2_init_inode_steal_slot(osb); | |
889 | ocfs2_init_meta_steal_slot(osb); | |
890 | } | |
891 | ||
892 | static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) | |
893 | { | |
894 | spin_lock(&osb->osb_lock); | |
895 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
896 | osb->s_inode_steal_slot = slot; | |
897 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
898 | osb->s_meta_steal_slot = slot; | |
899 | spin_unlock(&osb->osb_lock); | |
900 | } | |
901 | ||
902 | static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) | |
903 | { | |
904 | int slot = OCFS2_INVALID_SLOT; | |
905 | ||
906 | spin_lock(&osb->osb_lock); | |
907 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
908 | slot = osb->s_inode_steal_slot; | |
909 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
910 | slot = osb->s_meta_steal_slot; | |
911 | spin_unlock(&osb->osb_lock); | |
912 | ||
913 | return slot; | |
914 | } | |
915 | ||
916 | static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
917 | { | |
918 | return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); | |
919 | } | |
920 | ||
921 | static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) | |
922 | { | |
923 | return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); | |
924 | } | |
925 | ||
926 | static int ocfs2_steal_resource(struct ocfs2_super *osb, | |
927 | struct ocfs2_alloc_context *ac, | |
928 | int type) | |
929 | { | |
930 | int i, status = -ENOSPC; | |
931 | int slot = __ocfs2_get_steal_slot(osb, type); | |
932 | ||
933 | /* Start to steal resource from the first slot after ours. */ | |
934 | if (slot == OCFS2_INVALID_SLOT) | |
935 | slot = osb->slot_num + 1; | |
936 | ||
937 | for (i = 0; i < osb->max_slots; i++, slot++) { | |
938 | if (slot == osb->max_slots) | |
939 | slot = 0; | |
940 | ||
941 | if (slot == osb->slot_num) | |
942 | continue; | |
943 | ||
944 | status = ocfs2_reserve_suballoc_bits(osb, ac, | |
945 | type, | |
946 | (u32)slot, NULL, | |
947 | NOT_ALLOC_NEW_GROUP); | |
948 | if (status >= 0) { | |
949 | __ocfs2_set_steal_slot(osb, slot, type); | |
950 | break; | |
951 | } | |
952 | ||
953 | ocfs2_free_ac_resource(ac); | |
954 | } | |
955 | ||
956 | return status; | |
957 | } | |
958 | ||
959 | static int ocfs2_steal_inode(struct ocfs2_super *osb, | |
960 | struct ocfs2_alloc_context *ac) | |
961 | { | |
962 | return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); | |
963 | } | |
964 | ||
965 | static int ocfs2_steal_meta(struct ocfs2_super *osb, | |
966 | struct ocfs2_alloc_context *ac) | |
967 | { | |
968 | return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); | |
969 | } | |
970 | ||
cf1d6c76 TY |
971 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
972 | int blocks, | |
973 | struct ocfs2_alloc_context **ac) | |
ccd979bd MF |
974 | { |
975 | int status; | |
b89c5428 | 976 | int slot = ocfs2_get_meta_steal_slot(osb); |
ccd979bd | 977 | |
cd861280 | 978 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
979 | if (!(*ac)) { |
980 | status = -ENOMEM; | |
981 | mlog_errno(status); | |
982 | goto bail; | |
983 | } | |
984 | ||
cf1d6c76 | 985 | (*ac)->ac_bits_wanted = blocks; |
ccd979bd | 986 | (*ac)->ac_which = OCFS2_AC_USE_META; |
ccd979bd MF |
987 | (*ac)->ac_group_search = ocfs2_block_group_search; |
988 | ||
b89c5428 TY |
989 | if (slot != OCFS2_INVALID_SLOT && |
990 | atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) | |
991 | goto extent_steal; | |
992 | ||
993 | atomic_set(&osb->s_num_meta_stolen, 0); | |
da5cbf2f | 994 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
ffda89a3 | 995 | EXTENT_ALLOC_SYSTEM_INODE, |
b89c5428 | 996 | (u32)osb->slot_num, NULL, |
33d5d380 | 997 | ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); |
b89c5428 TY |
998 | |
999 | ||
1000 | if (status >= 0) { | |
1001 | status = 0; | |
1002 | if (slot != OCFS2_INVALID_SLOT) | |
1003 | ocfs2_init_meta_steal_slot(osb); | |
1004 | goto bail; | |
1005 | } else if (status < 0 && status != -ENOSPC) { | |
1006 | mlog_errno(status); | |
1007 | goto bail; | |
1008 | } | |
1009 | ||
1010 | ocfs2_free_ac_resource(*ac); | |
1011 | ||
1012 | extent_steal: | |
1013 | status = ocfs2_steal_meta(osb, *ac); | |
1014 | atomic_inc(&osb->s_num_meta_stolen); | |
ccd979bd MF |
1015 | if (status < 0) { |
1016 | if (status != -ENOSPC) | |
1017 | mlog_errno(status); | |
1018 | goto bail; | |
1019 | } | |
1020 | ||
1021 | status = 0; | |
1022 | bail: | |
1023 | if ((status < 0) && *ac) { | |
1024 | ocfs2_free_alloc_context(*ac); | |
1025 | *ac = NULL; | |
1026 | } | |
1027 | ||
c1e8d35e TM |
1028 | if (status) |
1029 | mlog_errno(status); | |
ccd979bd MF |
1030 | return status; |
1031 | } | |
1032 | ||
cf1d6c76 TY |
1033 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
1034 | struct ocfs2_extent_list *root_el, | |
1035 | struct ocfs2_alloc_context **ac) | |
1036 | { | |
1037 | return ocfs2_reserve_new_metadata_blocks(osb, | |
1038 | ocfs2_extend_meta_needed(root_el), | |
1039 | ac); | |
1040 | } | |
1041 | ||
ccd979bd | 1042 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
ccd979bd MF |
1043 | struct ocfs2_alloc_context **ac) |
1044 | { | |
1045 | int status; | |
b89c5428 | 1046 | int slot = ocfs2_get_inode_steal_slot(osb); |
feb473a6 | 1047 | u64 alloc_group; |
ccd979bd | 1048 | |
cd861280 | 1049 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1050 | if (!(*ac)) { |
1051 | status = -ENOMEM; | |
1052 | mlog_errno(status); | |
1053 | goto bail; | |
1054 | } | |
1055 | ||
1056 | (*ac)->ac_bits_wanted = 1; | |
ccd979bd MF |
1057 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
1058 | ||
ccd979bd MF |
1059 | (*ac)->ac_group_search = ocfs2_block_group_search; |
1060 | ||
1187c968 JB |
1061 | /* |
1062 | * stat(2) can't handle i_ino > 32bits, so we tell the | |
1063 | * lower levels not to allocate us a block group past that | |
12462f1d | 1064 | * limit. The 'inode64' mount option avoids this behavior. |
1187c968 | 1065 | */ |
12462f1d JB |
1066 | if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) |
1067 | (*ac)->ac_max_block = (u32)~0U; | |
1187c968 | 1068 | |
4d0ddb2c TM |
1069 | /* |
1070 | * slot is set when we successfully steal inode from other nodes. | |
1071 | * It is reset in 3 places: | |
1072 | * 1. when we flush the truncate log | |
1073 | * 2. when we complete local alloc recovery. | |
1074 | * 3. when we successfully allocate from our own slot. | |
1075 | * After it is set, we will go on stealing inodes until we find the | |
1076 | * need to check our slots to see whether there is some space for us. | |
1077 | */ | |
1078 | if (slot != OCFS2_INVALID_SLOT && | |
b89c5428 | 1079 | atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) |
4d0ddb2c TM |
1080 | goto inode_steal; |
1081 | ||
1082 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
feb473a6 | 1083 | alloc_group = osb->osb_inode_alloc_group; |
da5cbf2f MF |
1084 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
1085 | INODE_ALLOC_SYSTEM_INODE, | |
b89c5428 | 1086 | (u32)osb->slot_num, |
feb473a6 | 1087 | &alloc_group, |
60ca81e8 TM |
1088 | ALLOC_NEW_GROUP | |
1089 | ALLOC_GROUPS_FROM_GLOBAL); | |
4d0ddb2c TM |
1090 | if (status >= 0) { |
1091 | status = 0; | |
1092 | ||
feb473a6 TM |
1093 | spin_lock(&osb->osb_lock); |
1094 | osb->osb_inode_alloc_group = alloc_group; | |
1095 | spin_unlock(&osb->osb_lock); | |
2f73e135 TM |
1096 | trace_ocfs2_reserve_new_inode_new_group( |
1097 | (unsigned long long)alloc_group); | |
feb473a6 | 1098 | |
4d0ddb2c TM |
1099 | /* |
1100 | * Some inodes must be freed by us, so try to allocate | |
1101 | * from our own next time. | |
1102 | */ | |
1103 | if (slot != OCFS2_INVALID_SLOT) | |
1104 | ocfs2_init_inode_steal_slot(osb); | |
1105 | goto bail; | |
1106 | } else if (status < 0 && status != -ENOSPC) { | |
1107 | mlog_errno(status); | |
1108 | goto bail; | |
1109 | } | |
1110 | ||
1111 | ocfs2_free_ac_resource(*ac); | |
1112 | ||
1113 | inode_steal: | |
b89c5428 | 1114 | status = ocfs2_steal_inode(osb, *ac); |
4d0ddb2c | 1115 | atomic_inc(&osb->s_num_inodes_stolen); |
ccd979bd MF |
1116 | if (status < 0) { |
1117 | if (status != -ENOSPC) | |
1118 | mlog_errno(status); | |
1119 | goto bail; | |
1120 | } | |
1121 | ||
1122 | status = 0; | |
1123 | bail: | |
1124 | if ((status < 0) && *ac) { | |
1125 | ocfs2_free_alloc_context(*ac); | |
1126 | *ac = NULL; | |
1127 | } | |
1128 | ||
c1e8d35e TM |
1129 | if (status) |
1130 | mlog_errno(status); | |
ccd979bd MF |
1131 | return status; |
1132 | } | |
1133 | ||
1134 | /* local alloc code has to do the same thing, so rather than do this | |
1135 | * twice.. */ | |
1136 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
1137 | struct ocfs2_alloc_context *ac) | |
1138 | { | |
1139 | int status; | |
1140 | ||
ccd979bd MF |
1141 | ac->ac_which = OCFS2_AC_USE_MAIN; |
1142 | ac->ac_group_search = ocfs2_cluster_group_search; | |
1143 | ||
da5cbf2f MF |
1144 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
1145 | GLOBAL_BITMAP_SYSTEM_INODE, | |
feb473a6 | 1146 | OCFS2_INVALID_SLOT, NULL, |
ffda89a3 | 1147 | ALLOC_NEW_GROUP); |
47ee9d89 | 1148 | if (status < 0 && status != -ENOSPC) |
ccd979bd | 1149 | mlog_errno(status); |
da5cbf2f | 1150 | |
ccd979bd MF |
1151 | return status; |
1152 | } | |
1153 | ||
1154 | /* Callers don't need to care which bitmap (local alloc or main) to | |
1155 | * use so we figure it out for them, but unfortunately this clutters | |
1156 | * things a bit. */ | |
1187c968 JB |
1157 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
1158 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 1159 | int flags, |
1187c968 | 1160 | struct ocfs2_alloc_context **ac) |
ccd979bd | 1161 | { |
2070ad1a ER |
1162 | int status, ret = 0; |
1163 | int retried = 0; | |
ccd979bd | 1164 | |
cd861280 | 1165 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1166 | if (!(*ac)) { |
1167 | status = -ENOMEM; | |
1168 | mlog_errno(status); | |
1169 | goto bail; | |
1170 | } | |
1171 | ||
1172 | (*ac)->ac_bits_wanted = bits_wanted; | |
1187c968 | 1173 | (*ac)->ac_max_block = max_block; |
ccd979bd MF |
1174 | |
1175 | status = -ENOSPC; | |
60ca81e8 TM |
1176 | if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && |
1177 | ocfs2_alloc_should_use_local(osb, bits_wanted)) { | |
ccd979bd | 1178 | status = ocfs2_reserve_local_alloc_bits(osb, |
ccd979bd MF |
1179 | bits_wanted, |
1180 | *ac); | |
a57c8fd2 | 1181 | if ((status < 0) && (status != -ENOSPC)) { |
ccd979bd MF |
1182 | mlog_errno(status); |
1183 | goto bail; | |
ccd979bd MF |
1184 | } |
1185 | } | |
1186 | ||
1187 | if (status == -ENOSPC) { | |
2070ad1a | 1188 | retry: |
ccd979bd | 1189 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); |
2070ad1a ER |
1190 | /* Retry if there is sufficient space cached in truncate log */ |
1191 | if (status == -ENOSPC && !retried) { | |
1192 | retried = 1; | |
1193 | ocfs2_inode_unlock((*ac)->ac_inode, 1); | |
1194 | inode_unlock((*ac)->ac_inode); | |
1195 | ||
1196 | ret = ocfs2_try_to_free_truncate_log(osb, bits_wanted); | |
3bb8b653 JQ |
1197 | if (ret == 1) { |
1198 | iput((*ac)->ac_inode); | |
1199 | (*ac)->ac_inode = NULL; | |
2070ad1a | 1200 | goto retry; |
3bb8b653 | 1201 | } |
2070ad1a ER |
1202 | |
1203 | if (ret < 0) | |
1204 | mlog_errno(ret); | |
1205 | ||
1206 | inode_lock((*ac)->ac_inode); | |
3bb8b653 JQ |
1207 | ret = ocfs2_inode_lock((*ac)->ac_inode, NULL, 1); |
1208 | if (ret < 0) { | |
1209 | mlog_errno(ret); | |
1210 | inode_unlock((*ac)->ac_inode); | |
1211 | iput((*ac)->ac_inode); | |
1212 | (*ac)->ac_inode = NULL; | |
1213 | goto bail; | |
1214 | } | |
2070ad1a | 1215 | } |
ccd979bd MF |
1216 | if (status < 0) { |
1217 | if (status != -ENOSPC) | |
1218 | mlog_errno(status); | |
1219 | goto bail; | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | status = 0; | |
1224 | bail: | |
1225 | if ((status < 0) && *ac) { | |
1226 | ocfs2_free_alloc_context(*ac); | |
1227 | *ac = NULL; | |
1228 | } | |
1229 | ||
c1e8d35e TM |
1230 | if (status) |
1231 | mlog_errno(status); | |
ccd979bd MF |
1232 | return status; |
1233 | } | |
1234 | ||
1187c968 JB |
1235 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, |
1236 | u32 bits_wanted, | |
1237 | struct ocfs2_alloc_context **ac) | |
1238 | { | |
60ca81e8 TM |
1239 | return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, |
1240 | ALLOC_NEW_GROUP, ac); | |
1187c968 JB |
1241 | } |
1242 | ||
ccd979bd MF |
1243 | /* |
1244 | * More or less lifted from ext3. I'll leave their description below: | |
1245 | * | |
1246 | * "For ext3 allocations, we must not reuse any blocks which are | |
1247 | * allocated in the bitmap buffer's "last committed data" copy. This | |
1248 | * prevents deletes from freeing up the page for reuse until we have | |
1249 | * committed the delete transaction. | |
1250 | * | |
1251 | * If we didn't do this, then deleting something and reallocating it as | |
1252 | * data would allow the old block to be overwritten before the | |
1253 | * transaction committed (because we force data to disk before commit). | |
1254 | * This would lead to corruption if we crashed between overwriting the | |
1255 | * data and committing the delete. | |
1256 | * | |
1257 | * @@@ We may want to make this allocation behaviour conditional on | |
1258 | * data-writes at some point, and disable it for metadata allocations or | |
1259 | * sync-data inodes." | |
1260 | * | |
1261 | * Note: OCFS2 already does this differently for metadata vs data | |
c78bad11 | 1262 | * allocations, as those bitmaps are separate and undo access is never |
ccd979bd MF |
1263 | * called on a metadata group descriptor. |
1264 | */ | |
1265 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
1266 | int nr) | |
1267 | { | |
1268 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
94e41ecf | 1269 | int ret; |
ccd979bd MF |
1270 | |
1271 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) | |
1272 | return 0; | |
94e41ecf SM |
1273 | |
1274 | if (!buffer_jbd(bg_bh)) | |
ccd979bd MF |
1275 | return 1; |
1276 | ||
94e41ecf | 1277 | jbd_lock_bh_state(bg_bh); |
ccd979bd | 1278 | bg = (struct ocfs2_group_desc *) bh2jh(bg_bh)->b_committed_data; |
94e41ecf SM |
1279 | if (bg) |
1280 | ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); | |
1281 | else | |
1282 | ret = 1; | |
1283 | jbd_unlock_bh_state(bg_bh); | |
1284 | ||
1285 | return ret; | |
ccd979bd MF |
1286 | } |
1287 | ||
1288 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, | |
1289 | struct buffer_head *bg_bh, | |
1290 | unsigned int bits_wanted, | |
7bf72ede | 1291 | unsigned int total_bits, |
7d1fe093 | 1292 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1293 | { |
1294 | void *bitmap; | |
1295 | u16 best_offset, best_size; | |
1296 | int offset, start, found, status = 0; | |
1297 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1298 | ||
42035306 JB |
1299 | /* Callers got this descriptor from |
1300 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1301 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1302 | |
1303 | found = start = best_offset = best_size = 0; | |
1304 | bitmap = bg->bg_bitmap; | |
1305 | ||
7bf72ede MF |
1306 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
1307 | if (offset == total_bits) | |
ccd979bd MF |
1308 | break; |
1309 | ||
1310 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { | |
1311 | /* We found a zero, but we can't use it as it | |
1312 | * hasn't been put to disk yet! */ | |
1313 | found = 0; | |
1314 | start = offset + 1; | |
1315 | } else if (offset == start) { | |
1316 | /* we found a zero */ | |
1317 | found++; | |
1318 | /* move start to the next bit to test */ | |
1319 | start++; | |
1320 | } else { | |
1321 | /* got a zero after some ones */ | |
1322 | found = 1; | |
1323 | start = offset + 1; | |
1324 | } | |
1325 | if (found > best_size) { | |
1326 | best_size = found; | |
1327 | best_offset = start - found; | |
1328 | } | |
1329 | /* we got everything we needed */ | |
1330 | if (found == bits_wanted) { | |
1331 | /* mlog(0, "Found it all!\n"); */ | |
1332 | break; | |
1333 | } | |
1334 | } | |
1335 | ||
7d1fe093 JB |
1336 | if (best_size) { |
1337 | res->sr_bit_offset = best_offset; | |
1338 | res->sr_bits = best_size; | |
ccd979bd MF |
1339 | } else { |
1340 | status = -ENOSPC; | |
1341 | /* No error log here -- see the comment above | |
1342 | * ocfs2_test_bg_bit_allocatable */ | |
1343 | } | |
1344 | ||
1345 | return status; | |
1346 | } | |
1347 | ||
0a2fcd89 | 1348 | int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
1349 | struct inode *alloc_inode, |
1350 | struct ocfs2_group_desc *bg, | |
1351 | struct buffer_head *group_bh, | |
1352 | unsigned int bit_off, | |
1353 | unsigned int num_bits) | |
1354 | { | |
1355 | int status; | |
1356 | void *bitmap = bg->bg_bitmap; | |
1357 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1358 | ||
42035306 JB |
1359 | /* All callers get the descriptor via |
1360 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1361 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1362 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); |
1363 | ||
2f73e135 | 1364 | trace_ocfs2_block_group_set_bits(bit_off, num_bits); |
ccd979bd MF |
1365 | |
1366 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1367 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
1368 | ||
13723d00 | 1369 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 1370 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1371 | group_bh, |
1372 | journal_type); | |
ccd979bd MF |
1373 | if (status < 0) { |
1374 | mlog_errno(status); | |
1375 | goto bail; | |
1376 | } | |
1377 | ||
1378 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); | |
9b5cd10e | 1379 | if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { |
7ecef14a JP |
1380 | return ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit count %u but claims %u are freed. num_bits %d\n", |
1381 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1382 | le16_to_cpu(bg->bg_bits), | |
1383 | le16_to_cpu(bg->bg_free_bits_count), | |
1384 | num_bits); | |
9b5cd10e | 1385 | } |
ccd979bd MF |
1386 | while(num_bits--) |
1387 | ocfs2_set_bit(bit_off++, bitmap); | |
1388 | ||
ec20cec7 | 1389 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
1390 | |
1391 | bail: | |
ccd979bd MF |
1392 | return status; |
1393 | } | |
1394 | ||
1395 | /* find the one with the most empty bits */ | |
1396 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) | |
1397 | { | |
1398 | u16 curr, best; | |
1399 | ||
1400 | BUG_ON(!cl->cl_next_free_rec); | |
1401 | ||
1402 | best = curr = 0; | |
1403 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { | |
1404 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > | |
1405 | le32_to_cpu(cl->cl_recs[best].c_free)) | |
1406 | best = curr; | |
1407 | curr++; | |
1408 | } | |
1409 | ||
1410 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); | |
1411 | return best; | |
1412 | } | |
1413 | ||
1fabe148 | 1414 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
1415 | struct inode *alloc_inode, |
1416 | struct buffer_head *fe_bh, | |
1417 | struct buffer_head *bg_bh, | |
1418 | struct buffer_head *prev_bg_bh, | |
1419 | u16 chain) | |
1420 | { | |
1421 | int status; | |
1422 | /* there is a really tiny chance the journal calls could fail, | |
1423 | * but we wouldn't want inconsistent blocks in *any* case. */ | |
49309841 | 1424 | u64 bg_ptr, prev_bg_ptr; |
ccd979bd MF |
1425 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; |
1426 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1427 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; | |
1428 | ||
42035306 JB |
1429 | /* The caller got these descriptors from |
1430 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1431 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
1432 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); | |
ccd979bd | 1433 | |
2f73e135 TM |
1434 | trace_ocfs2_relink_block_group( |
1435 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, | |
1436 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1437 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); | |
ccd979bd | 1438 | |
ccd979bd MF |
1439 | bg_ptr = le64_to_cpu(bg->bg_next_group); |
1440 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); | |
1441 | ||
0cf2f763 JB |
1442 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1443 | prev_bg_bh, | |
13723d00 | 1444 | OCFS2_JOURNAL_ACCESS_WRITE); |
25e28921 | 1445 | if (status < 0) |
49309841 | 1446 | goto out; |
ccd979bd MF |
1447 | |
1448 | prev_bg->bg_next_group = bg->bg_next_group; | |
ec20cec7 | 1449 | ocfs2_journal_dirty(handle, prev_bg_bh); |
ccd979bd | 1450 | |
0cf2f763 JB |
1451 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1452 | bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
25e28921 | 1453 | if (status < 0) |
49309841 | 1454 | goto out_rollback_prev_bg; |
ccd979bd MF |
1455 | |
1456 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; | |
ec20cec7 | 1457 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd | 1458 | |
0cf2f763 JB |
1459 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
1460 | fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
25e28921 | 1461 | if (status < 0) |
49309841 | 1462 | goto out_rollback_bg; |
ccd979bd MF |
1463 | |
1464 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; | |
ec20cec7 | 1465 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 1466 | |
49309841 | 1467 | out: |
25e28921 AM |
1468 | if (status < 0) |
1469 | mlog_errno(status); | |
49309841 | 1470 | return status; |
42035306 | 1471 | |
49309841 JL |
1472 | out_rollback_bg: |
1473 | bg->bg_next_group = cpu_to_le64(bg_ptr); | |
1474 | out_rollback_prev_bg: | |
1475 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); | |
25e28921 | 1476 | goto out; |
ccd979bd MF |
1477 | } |
1478 | ||
1479 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
1480 | u32 wanted) | |
1481 | { | |
1482 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; | |
1483 | } | |
1484 | ||
1485 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 | |
1486 | * value on error. */ | |
1487 | static int ocfs2_cluster_group_search(struct inode *inode, | |
1488 | struct buffer_head *group_bh, | |
1489 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1490 | u64 max_block, |
7d1fe093 | 1491 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1492 | { |
1493 | int search = -ENOSPC; | |
1494 | int ret; | |
1187c968 | 1495 | u64 blkoff; |
7bf72ede | 1496 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
9c7af40b | 1497 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bf72ede | 1498 | unsigned int max_bits, gd_cluster_off; |
ccd979bd MF |
1499 | |
1500 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1501 | ||
7bf72ede MF |
1502 | if (gd->bg_free_bits_count) { |
1503 | max_bits = le16_to_cpu(gd->bg_bits); | |
1504 | ||
1505 | /* Tail groups in cluster bitmaps which aren't cpg | |
25985edc | 1506 | * aligned are prone to partial extension by a failed |
7bf72ede MF |
1507 | * fs resize. If the file system resize never got to |
1508 | * update the dinode cluster count, then we don't want | |
1509 | * to trust any clusters past it, regardless of what | |
1510 | * the group descriptor says. */ | |
1511 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, | |
1512 | le64_to_cpu(gd->bg_blkno)); | |
1513 | if ((gd_cluster_off + max_bits) > | |
1514 | OCFS2_I(inode)->ip_clusters) { | |
1515 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; | |
2f73e135 TM |
1516 | trace_ocfs2_cluster_group_search_wrong_max_bits( |
1517 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
1518 | le16_to_cpu(gd->bg_bits), | |
1519 | OCFS2_I(inode)->ip_clusters, max_bits); | |
7bf72ede MF |
1520 | } |
1521 | ||
1119d3c0 | 1522 | ret = ocfs2_block_group_find_clear_bits(osb, |
ccd979bd | 1523 | group_bh, bits_wanted, |
7d1fe093 | 1524 | max_bits, res); |
ccd979bd MF |
1525 | if (ret) |
1526 | return ret; | |
1527 | ||
1187c968 JB |
1528 | if (max_block) { |
1529 | blkoff = ocfs2_clusters_to_blocks(inode->i_sb, | |
1530 | gd_cluster_off + | |
7d1fe093 JB |
1531 | res->sr_bit_offset + |
1532 | res->sr_bits); | |
2f73e135 TM |
1533 | trace_ocfs2_cluster_group_search_max_block( |
1534 | (unsigned long long)blkoff, | |
1535 | (unsigned long long)max_block); | |
1187c968 JB |
1536 | if (blkoff > max_block) |
1537 | return -ENOSPC; | |
1538 | } | |
1539 | ||
ccd979bd MF |
1540 | /* ocfs2_block_group_find_clear_bits() might |
1541 | * return success, but we still want to return | |
1542 | * -ENOSPC unless it found the minimum number | |
1543 | * of bits. */ | |
7d1fe093 | 1544 | if (min_bits <= res->sr_bits) |
ccd979bd | 1545 | search = 0; /* success */ |
7d1fe093 | 1546 | else if (res->sr_bits) { |
9c7af40b MF |
1547 | /* |
1548 | * Don't show bits which we'll be returning | |
1549 | * for allocation to the local alloc bitmap. | |
1550 | */ | |
7d1fe093 | 1551 | ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); |
ccd979bd MF |
1552 | } |
1553 | } | |
1554 | ||
1555 | return search; | |
1556 | } | |
1557 | ||
1558 | static int ocfs2_block_group_search(struct inode *inode, | |
1559 | struct buffer_head *group_bh, | |
1560 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1561 | u64 max_block, |
7d1fe093 | 1562 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1563 | { |
1564 | int ret = -ENOSPC; | |
1187c968 | 1565 | u64 blkoff; |
ccd979bd MF |
1566 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; |
1567 | ||
1568 | BUG_ON(min_bits != 1); | |
1569 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); | |
1570 | ||
1187c968 | 1571 | if (bg->bg_free_bits_count) { |
ccd979bd MF |
1572 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1573 | group_bh, bits_wanted, | |
7bf72ede | 1574 | le16_to_cpu(bg->bg_bits), |
7d1fe093 | 1575 | res); |
1187c968 | 1576 | if (!ret && max_block) { |
7d1fe093 JB |
1577 | blkoff = le64_to_cpu(bg->bg_blkno) + |
1578 | res->sr_bit_offset + res->sr_bits; | |
2f73e135 TM |
1579 | trace_ocfs2_block_group_search_max_block( |
1580 | (unsigned long long)blkoff, | |
1581 | (unsigned long long)max_block); | |
1187c968 JB |
1582 | if (blkoff > max_block) |
1583 | ret = -ENOSPC; | |
1584 | } | |
1585 | } | |
ccd979bd MF |
1586 | |
1587 | return ret; | |
1588 | } | |
1589 | ||
0a2fcd89 | 1590 | int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
1fabe148 | 1591 | handle_t *handle, |
883d4cae MF |
1592 | struct buffer_head *di_bh, |
1593 | u32 num_bits, | |
1594 | u16 chain) | |
1595 | { | |
1596 | int ret; | |
1597 | u32 tmp_used; | |
1598 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1599 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; | |
1600 | ||
0cf2f763 | 1601 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
13723d00 | 1602 | OCFS2_JOURNAL_ACCESS_WRITE); |
883d4cae MF |
1603 | if (ret < 0) { |
1604 | mlog_errno(ret); | |
1605 | goto out; | |
1606 | } | |
1607 | ||
1608 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1609 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); | |
1610 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); | |
ec20cec7 | 1611 | ocfs2_journal_dirty(handle, di_bh); |
883d4cae MF |
1612 | |
1613 | out: | |
1614 | return ret; | |
1615 | } | |
1616 | ||
db66c715 YL |
1617 | void ocfs2_rollback_alloc_dinode_counts(struct inode *inode, |
1618 | struct buffer_head *di_bh, | |
1619 | u32 num_bits, | |
1620 | u16 chain) | |
1621 | { | |
1622 | u32 tmp_used; | |
1623 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1624 | struct ocfs2_chain_list *cl; | |
1625 | ||
1626 | cl = (struct ocfs2_chain_list *)&di->id2.i_chain; | |
1627 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1628 | di->id1.bitmap1.i_used = cpu_to_le32(tmp_used - num_bits); | |
1629 | le32_add_cpu(&cl->cl_recs[chain].c_free, num_bits); | |
1630 | } | |
1631 | ||
ba206635 JB |
1632 | static int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, |
1633 | struct ocfs2_extent_rec *rec, | |
1634 | struct ocfs2_chain_list *cl) | |
13e434cf JB |
1635 | { |
1636 | unsigned int bpc = le16_to_cpu(cl->cl_bpc); | |
1637 | unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; | |
72094e43 | 1638 | unsigned int bitcount = le16_to_cpu(rec->e_leaf_clusters) * bpc; |
13e434cf JB |
1639 | |
1640 | if (res->sr_bit_offset < bitoff) | |
1641 | return 0; | |
1642 | if (res->sr_bit_offset >= (bitoff + bitcount)) | |
1643 | return 0; | |
ba206635 JB |
1644 | res->sr_blkno = le64_to_cpu(rec->e_blkno) + |
1645 | (res->sr_bit_offset - bitoff); | |
13e434cf JB |
1646 | if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) |
1647 | res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; | |
1648 | return 1; | |
1649 | } | |
1650 | ||
ba206635 JB |
1651 | static void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, |
1652 | struct ocfs2_group_desc *bg, | |
1653 | struct ocfs2_suballoc_result *res) | |
13e434cf JB |
1654 | { |
1655 | int i; | |
2b6cb576 | 1656 | u64 bg_blkno = res->sr_bg_blkno; /* Save off */ |
13e434cf JB |
1657 | struct ocfs2_extent_rec *rec; |
1658 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; | |
1659 | struct ocfs2_chain_list *cl = &di->id2.i_chain; | |
1660 | ||
ba206635 JB |
1661 | if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { |
1662 | res->sr_blkno = 0; | |
13e434cf | 1663 | return; |
ba206635 | 1664 | } |
13e434cf | 1665 | |
ba206635 | 1666 | res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; |
2b6cb576 | 1667 | res->sr_bg_blkno = 0; /* Clear it for contig block groups */ |
4711954e | 1668 | if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || |
ba206635 | 1669 | !bg->bg_list.l_next_free_rec) |
13e434cf JB |
1670 | return; |
1671 | ||
1672 | for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { | |
1673 | rec = &bg->bg_list.l_recs[i]; | |
2b6cb576 JB |
1674 | if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { |
1675 | res->sr_bg_blkno = bg_blkno; /* Restore */ | |
13e434cf | 1676 | break; |
2b6cb576 | 1677 | } |
13e434cf JB |
1678 | } |
1679 | } | |
1680 | ||
883d4cae | 1681 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, |
1fabe148 | 1682 | handle_t *handle, |
883d4cae MF |
1683 | u32 bits_wanted, |
1684 | u32 min_bits, | |
7d1fe093 | 1685 | struct ocfs2_suballoc_result *res, |
883d4cae MF |
1686 | u16 *bits_left) |
1687 | { | |
1688 | int ret; | |
883d4cae MF |
1689 | struct buffer_head *group_bh = NULL; |
1690 | struct ocfs2_group_desc *gd; | |
68f64d47 | 1691 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; |
883d4cae | 1692 | struct inode *alloc_inode = ac->ac_inode; |
883d4cae | 1693 | |
7d1fe093 JB |
1694 | ret = ocfs2_read_group_descriptor(alloc_inode, di, |
1695 | res->sr_bg_blkno, &group_bh); | |
883d4cae MF |
1696 | if (ret < 0) { |
1697 | mlog_errno(ret); | |
1698 | return ret; | |
1699 | } | |
1700 | ||
1701 | gd = (struct ocfs2_group_desc *) group_bh->b_data; | |
883d4cae | 1702 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, |
7d1fe093 | 1703 | ac->ac_max_block, res); |
883d4cae MF |
1704 | if (ret < 0) { |
1705 | if (ret != -ENOSPC) | |
1706 | mlog_errno(ret); | |
1707 | goto out; | |
1708 | } | |
1709 | ||
13e434cf | 1710 | if (!ret) |
ba206635 | 1711 | ocfs2_bg_discontig_fix_result(ac, gd, res); |
13e434cf | 1712 | |
e49e2767 MF |
1713 | /* |
1714 | * sr_bg_blkno might have been changed by | |
1715 | * ocfs2_bg_discontig_fix_result | |
1716 | */ | |
1717 | res->sr_bg_stable_blkno = group_bh->b_blocknr; | |
1718 | ||
1719 | if (ac->ac_find_loc_only) | |
1720 | goto out_loc_only; | |
1721 | ||
883d4cae | 1722 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, |
7d1fe093 | 1723 | res->sr_bits, |
883d4cae MF |
1724 | le16_to_cpu(gd->bg_chain)); |
1725 | if (ret < 0) { | |
1726 | mlog_errno(ret); | |
1727 | goto out; | |
1728 | } | |
1729 | ||
1730 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, | |
7d1fe093 | 1731 | res->sr_bit_offset, res->sr_bits); |
db66c715 YL |
1732 | if (ret < 0) { |
1733 | ocfs2_rollback_alloc_dinode_counts(alloc_inode, ac->ac_bh, | |
1734 | res->sr_bits, | |
1735 | le16_to_cpu(gd->bg_chain)); | |
883d4cae | 1736 | mlog_errno(ret); |
db66c715 | 1737 | } |
883d4cae | 1738 | |
e49e2767 | 1739 | out_loc_only: |
883d4cae MF |
1740 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); |
1741 | ||
1742 | out: | |
1743 | brelse(group_bh); | |
1744 | ||
1745 | return ret; | |
1746 | } | |
1747 | ||
ccd979bd | 1748 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
1fabe148 | 1749 | handle_t *handle, |
ccd979bd MF |
1750 | u32 bits_wanted, |
1751 | u32 min_bits, | |
7d1fe093 | 1752 | struct ocfs2_suballoc_result *res, |
883d4cae | 1753 | u16 *bits_left) |
ccd979bd MF |
1754 | { |
1755 | int status; | |
7d1fe093 | 1756 | u16 chain; |
ccd979bd | 1757 | u64 next_group; |
ccd979bd MF |
1758 | struct inode *alloc_inode = ac->ac_inode; |
1759 | struct buffer_head *group_bh = NULL; | |
1760 | struct buffer_head *prev_group_bh = NULL; | |
1761 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1762 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; | |
1763 | struct ocfs2_group_desc *bg; | |
1764 | ||
1765 | chain = ac->ac_chain; | |
2f73e135 TM |
1766 | trace_ocfs2_search_chain_begin( |
1767 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, | |
1768 | bits_wanted, chain); | |
ccd979bd | 1769 | |
68f64d47 JB |
1770 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1771 | le64_to_cpu(cl->cl_recs[chain].c_blkno), | |
1772 | &group_bh); | |
ccd979bd MF |
1773 | if (status < 0) { |
1774 | mlog_errno(status); | |
1775 | goto bail; | |
1776 | } | |
1777 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1778 | |
1779 | status = -ENOSPC; | |
1780 | /* for now, the chain search is a bit simplistic. We just use | |
1781 | * the 1st group with any empty bits. */ | |
1187c968 JB |
1782 | while ((status = ac->ac_group_search(alloc_inode, group_bh, |
1783 | bits_wanted, min_bits, | |
7d1fe093 JB |
1784 | ac->ac_max_block, |
1785 | res)) == -ENOSPC) { | |
ccd979bd MF |
1786 | if (!bg->bg_next_group) |
1787 | break; | |
a81cb88b MF |
1788 | |
1789 | brelse(prev_group_bh); | |
1790 | prev_group_bh = NULL; | |
1791 | ||
ccd979bd MF |
1792 | next_group = le64_to_cpu(bg->bg_next_group); |
1793 | prev_group_bh = group_bh; | |
1794 | group_bh = NULL; | |
68f64d47 JB |
1795 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1796 | next_group, &group_bh); | |
ccd979bd MF |
1797 | if (status < 0) { |
1798 | mlog_errno(status); | |
1799 | goto bail; | |
1800 | } | |
1801 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1802 | } |
1803 | if (status < 0) { | |
1804 | if (status != -ENOSPC) | |
1805 | mlog_errno(status); | |
1806 | goto bail; | |
1807 | } | |
1808 | ||
2f73e135 TM |
1809 | trace_ocfs2_search_chain_succ( |
1810 | (unsigned long long)le64_to_cpu(bg->bg_blkno), res->sr_bits); | |
ccd979bd | 1811 | |
7d1fe093 | 1812 | res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); |
ccd979bd | 1813 | |
7d1fe093 | 1814 | BUG_ON(res->sr_bits == 0); |
13e434cf | 1815 | if (!status) |
ba206635 | 1816 | ocfs2_bg_discontig_fix_result(ac, bg, res); |
13e434cf | 1817 | |
e49e2767 MF |
1818 | /* |
1819 | * sr_bg_blkno might have been changed by | |
1820 | * ocfs2_bg_discontig_fix_result | |
1821 | */ | |
1822 | res->sr_bg_stable_blkno = group_bh->b_blocknr; | |
ccd979bd MF |
1823 | |
1824 | /* | |
1825 | * Keep track of previous block descriptor read. When | |
1826 | * we find a target, if we have read more than X | |
1827 | * number of descriptors, and the target is reasonably | |
1828 | * empty, relink him to top of his chain. | |
1829 | * | |
1830 | * We've read 0 extra blocks and only send one more to | |
1831 | * the transaction, yet the next guy to search has a | |
1832 | * much easier time. | |
1833 | * | |
1834 | * Do this *after* figuring out how many bits we're taking out | |
1835 | * of our target group. | |
1836 | */ | |
309a85b6 | 1837 | if (!ac->ac_disable_chain_relink && |
ccd979bd | 1838 | (prev_group_bh) && |
7d1fe093 | 1839 | (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { |
ccd979bd MF |
1840 | status = ocfs2_relink_block_group(handle, alloc_inode, |
1841 | ac->ac_bh, group_bh, | |
1842 | prev_group_bh, chain); | |
1843 | if (status < 0) { | |
1844 | mlog_errno(status); | |
1845 | goto bail; | |
1846 | } | |
1847 | } | |
1848 | ||
e49e2767 MF |
1849 | if (ac->ac_find_loc_only) |
1850 | goto out_loc_only; | |
1851 | ||
d5134982 MF |
1852 | status = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, |
1853 | ac->ac_bh, res->sr_bits, | |
1854 | chain); | |
1855 | if (status) { | |
ccd979bd MF |
1856 | mlog_errno(status); |
1857 | goto bail; | |
1858 | } | |
1859 | ||
ccd979bd MF |
1860 | status = ocfs2_block_group_set_bits(handle, |
1861 | alloc_inode, | |
1862 | bg, | |
1863 | group_bh, | |
7d1fe093 JB |
1864 | res->sr_bit_offset, |
1865 | res->sr_bits); | |
ccd979bd | 1866 | if (status < 0) { |
db66c715 YL |
1867 | ocfs2_rollback_alloc_dinode_counts(alloc_inode, |
1868 | ac->ac_bh, res->sr_bits, chain); | |
ccd979bd MF |
1869 | mlog_errno(status); |
1870 | goto bail; | |
1871 | } | |
1872 | ||
2f73e135 TM |
1873 | trace_ocfs2_search_chain_end( |
1874 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
1875 | res->sr_bits); | |
ccd979bd | 1876 | |
e49e2767 | 1877 | out_loc_only: |
883d4cae | 1878 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
ccd979bd | 1879 | bail: |
a81cb88b MF |
1880 | brelse(group_bh); |
1881 | brelse(prev_group_bh); | |
ccd979bd | 1882 | |
c1e8d35e TM |
1883 | if (status) |
1884 | mlog_errno(status); | |
ccd979bd MF |
1885 | return status; |
1886 | } | |
1887 | ||
1888 | /* will give out up to bits_wanted contiguous bits. */ | |
aa8f8e93 | 1889 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 1890 | handle_t *handle, |
ccd979bd MF |
1891 | u32 bits_wanted, |
1892 | u32 min_bits, | |
7d1fe093 | 1893 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1894 | { |
1895 | int status; | |
1896 | u16 victim, i; | |
883d4cae | 1897 | u16 bits_left = 0; |
b2b6ebf5 | 1898 | u64 hint = ac->ac_last_group; |
ccd979bd MF |
1899 | struct ocfs2_chain_list *cl; |
1900 | struct ocfs2_dinode *fe; | |
1901 | ||
ccd979bd MF |
1902 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
1903 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); | |
1904 | BUG_ON(!ac->ac_bh); | |
1905 | ||
1906 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
10995aa2 JB |
1907 | |
1908 | /* The bh was validated by the inode read during | |
1909 | * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ | |
1910 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
1911 | ||
ccd979bd MF |
1912 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= |
1913 | le32_to_cpu(fe->id1.bitmap1.i_total)) { | |
17a5b9ab | 1914 | status = ocfs2_error(ac->ac_inode->i_sb, |
7ecef14a JP |
1915 | "Chain allocator dinode %llu has %u used bits but only %u total\n", |
1916 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
1917 | le32_to_cpu(fe->id1.bitmap1.i_used), | |
1918 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
ccd979bd MF |
1919 | goto bail; |
1920 | } | |
1921 | ||
b2b6ebf5 | 1922 | res->sr_bg_blkno = hint; |
7d1fe093 | 1923 | if (res->sr_bg_blkno) { |
883d4cae MF |
1924 | /* Attempt to short-circuit the usual search mechanism |
1925 | * by jumping straight to the most recently used | |
b595076a | 1926 | * allocation group. This helps us maintain some |
883d4cae | 1927 | * contiguousness across allocations. */ |
da5cbf2f | 1928 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
7d1fe093 JB |
1929 | min_bits, res, &bits_left); |
1930 | if (!status) | |
883d4cae | 1931 | goto set_hint; |
883d4cae MF |
1932 | if (status < 0 && status != -ENOSPC) { |
1933 | mlog_errno(status); | |
1934 | goto bail; | |
1935 | } | |
1936 | } | |
1937 | ||
ccd979bd MF |
1938 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
1939 | ||
1940 | victim = ocfs2_find_victim_chain(cl); | |
1941 | ac->ac_chain = victim; | |
ccd979bd | 1942 | |
7d1fe093 JB |
1943 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
1944 | res, &bits_left); | |
b2b6ebf5 | 1945 | if (!status) { |
1d1aff8c JQ |
1946 | if (ocfs2_is_cluster_bitmap(ac->ac_inode)) |
1947 | hint = res->sr_bg_blkno; | |
1948 | else | |
1949 | hint = ocfs2_group_from_res(res); | |
883d4cae | 1950 | goto set_hint; |
b2b6ebf5 | 1951 | } |
ccd979bd MF |
1952 | if (status < 0 && status != -ENOSPC) { |
1953 | mlog_errno(status); | |
1954 | goto bail; | |
1955 | } | |
1956 | ||
2f73e135 | 1957 | trace_ocfs2_claim_suballoc_bits(victim); |
ccd979bd MF |
1958 | |
1959 | /* If we didn't pick a good victim, then just default to | |
1960 | * searching each chain in order. Don't allow chain relinking | |
1961 | * because we only calculate enough journal credits for one | |
1962 | * relink per alloc. */ | |
309a85b6 | 1963 | ac->ac_disable_chain_relink = 1; |
ccd979bd MF |
1964 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { |
1965 | if (i == victim) | |
1966 | continue; | |
1967 | if (!cl->cl_recs[i].c_free) | |
1968 | continue; | |
1969 | ||
1970 | ac->ac_chain = i; | |
da5cbf2f | 1971 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
7d1fe093 | 1972 | res, &bits_left); |
b2b6ebf5 MF |
1973 | if (!status) { |
1974 | hint = ocfs2_group_from_res(res); | |
ccd979bd | 1975 | break; |
b2b6ebf5 | 1976 | } |
ccd979bd MF |
1977 | if (status < 0 && status != -ENOSPC) { |
1978 | mlog_errno(status); | |
1979 | goto bail; | |
1980 | } | |
1981 | } | |
ccd979bd | 1982 | |
883d4cae MF |
1983 | set_hint: |
1984 | if (status != -ENOSPC) { | |
1985 | /* If the next search of this group is not likely to | |
1986 | * yield a suitable extent, then we reset the last | |
1987 | * group hint so as to not waste a disk read */ | |
1988 | if (bits_left < min_bits) | |
1989 | ac->ac_last_group = 0; | |
1990 | else | |
b2b6ebf5 | 1991 | ac->ac_last_group = hint; |
883d4cae MF |
1992 | } |
1993 | ||
1994 | bail: | |
c1e8d35e TM |
1995 | if (status) |
1996 | mlog_errno(status); | |
ccd979bd MF |
1997 | return status; |
1998 | } | |
1999 | ||
1ed9b777 | 2000 | int ocfs2_claim_metadata(handle_t *handle, |
ccd979bd MF |
2001 | struct ocfs2_alloc_context *ac, |
2002 | u32 bits_wanted, | |
2b6cb576 | 2003 | u64 *suballoc_loc, |
ccd979bd MF |
2004 | u16 *suballoc_bit_start, |
2005 | unsigned int *num_bits, | |
2006 | u64 *blkno_start) | |
2007 | { | |
2008 | int status; | |
ba206635 | 2009 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
ccd979bd MF |
2010 | |
2011 | BUG_ON(!ac); | |
2012 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); | |
2013 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); | |
ccd979bd | 2014 | |
aa8f8e93 | 2015 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2016 | handle, |
ccd979bd MF |
2017 | bits_wanted, |
2018 | 1, | |
7d1fe093 | 2019 | &res); |
ccd979bd MF |
2020 | if (status < 0) { |
2021 | mlog_errno(status); | |
2022 | goto bail; | |
2023 | } | |
1ed9b777 | 2024 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2025 | |
2b6cb576 | 2026 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2027 | *suballoc_bit_start = res.sr_bit_offset; |
ba206635 | 2028 | *blkno_start = res.sr_blkno; |
7d1fe093 JB |
2029 | ac->ac_bits_given += res.sr_bits; |
2030 | *num_bits = res.sr_bits; | |
ccd979bd MF |
2031 | status = 0; |
2032 | bail: | |
c1e8d35e TM |
2033 | if (status) |
2034 | mlog_errno(status); | |
ccd979bd MF |
2035 | return status; |
2036 | } | |
2037 | ||
13821151 | 2038 | static void ocfs2_init_inode_ac_group(struct inode *dir, |
abf1b3cb | 2039 | struct buffer_head *parent_di_bh, |
13821151 TM |
2040 | struct ocfs2_alloc_context *ac) |
2041 | { | |
abf1b3cb | 2042 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data; |
13821151 TM |
2043 | /* |
2044 | * Try to allocate inodes from some specific group. | |
2045 | * | |
2046 | * If the parent dir has recorded the last group used in allocation, | |
2047 | * cool, use it. Otherwise if we try to allocate new inode from the | |
2048 | * same slot the parent dir belongs to, use the same chunk. | |
2049 | * | |
2050 | * We are very careful here to avoid the mistake of setting | |
2051 | * ac_last_group to a group descriptor from a different (unlocked) slot. | |
2052 | */ | |
2053 | if (OCFS2_I(dir)->ip_last_used_group && | |
2054 | OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) | |
2055 | ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; | |
abf1b3cb TM |
2056 | else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) { |
2057 | if (di->i_suballoc_loc) | |
2058 | ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc); | |
2059 | else | |
2060 | ac->ac_last_group = ocfs2_which_suballoc_group( | |
2061 | le64_to_cpu(di->i_blkno), | |
2062 | le16_to_cpu(di->i_suballoc_bit)); | |
2063 | } | |
13821151 TM |
2064 | } |
2065 | ||
2066 | static inline void ocfs2_save_inode_ac_group(struct inode *dir, | |
2067 | struct ocfs2_alloc_context *ac) | |
2068 | { | |
2069 | OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; | |
2070 | OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; | |
2071 | } | |
2072 | ||
e49e2767 MF |
2073 | int ocfs2_find_new_inode_loc(struct inode *dir, |
2074 | struct buffer_head *parent_fe_bh, | |
2075 | struct ocfs2_alloc_context *ac, | |
2076 | u64 *fe_blkno) | |
2077 | { | |
2078 | int ret; | |
2079 | handle_t *handle = NULL; | |
2080 | struct ocfs2_suballoc_result *res; | |
2081 | ||
2082 | BUG_ON(!ac); | |
2083 | BUG_ON(ac->ac_bits_given != 0); | |
2084 | BUG_ON(ac->ac_bits_wanted != 1); | |
2085 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
2086 | ||
2087 | res = kzalloc(sizeof(*res), GFP_NOFS); | |
2088 | if (res == NULL) { | |
2089 | ret = -ENOMEM; | |
2090 | mlog_errno(ret); | |
2091 | goto out; | |
2092 | } | |
2093 | ||
2094 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); | |
2095 | ||
2096 | /* | |
2097 | * The handle started here is for chain relink. Alternatively, | |
2098 | * we could just disable relink for these calls. | |
2099 | */ | |
2100 | handle = ocfs2_start_trans(OCFS2_SB(dir->i_sb), OCFS2_SUBALLOC_ALLOC); | |
2101 | if (IS_ERR(handle)) { | |
2102 | ret = PTR_ERR(handle); | |
2103 | handle = NULL; | |
2104 | mlog_errno(ret); | |
2105 | goto out; | |
2106 | } | |
2107 | ||
2108 | /* | |
2109 | * This will instruct ocfs2_claim_suballoc_bits and | |
2110 | * ocfs2_search_one_group to search but save actual allocation | |
2111 | * for later. | |
2112 | */ | |
2113 | ac->ac_find_loc_only = 1; | |
2114 | ||
2115 | ret = ocfs2_claim_suballoc_bits(ac, handle, 1, 1, res); | |
2116 | if (ret < 0) { | |
2117 | mlog_errno(ret); | |
2118 | goto out; | |
2119 | } | |
2120 | ||
2121 | ac->ac_find_loc_priv = res; | |
2122 | *fe_blkno = res->sr_blkno; | |
6fdb702d | 2123 | ocfs2_update_inode_fsync_trans(handle, dir, 0); |
e49e2767 MF |
2124 | out: |
2125 | if (handle) | |
2126 | ocfs2_commit_trans(OCFS2_SB(dir->i_sb), handle); | |
2127 | ||
2128 | if (ret) | |
2129 | kfree(res); | |
2130 | ||
2131 | return ret; | |
2132 | } | |
2133 | ||
2134 | int ocfs2_claim_new_inode_at_loc(handle_t *handle, | |
2135 | struct inode *dir, | |
2136 | struct ocfs2_alloc_context *ac, | |
2137 | u64 *suballoc_loc, | |
2138 | u16 *suballoc_bit, | |
2139 | u64 di_blkno) | |
2140 | { | |
2141 | int ret; | |
2142 | u16 chain; | |
2143 | struct ocfs2_suballoc_result *res = ac->ac_find_loc_priv; | |
2144 | struct buffer_head *bg_bh = NULL; | |
2145 | struct ocfs2_group_desc *bg; | |
2146 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
2147 | ||
2148 | /* | |
2149 | * Since di_blkno is being passed back in, we check for any | |
2150 | * inconsistencies which may have happened between | |
2151 | * calls. These are code bugs as di_blkno is not expected to | |
2152 | * change once returned from ocfs2_find_new_inode_loc() | |
2153 | */ | |
2154 | BUG_ON(res->sr_blkno != di_blkno); | |
2155 | ||
2156 | ret = ocfs2_read_group_descriptor(ac->ac_inode, di, | |
2157 | res->sr_bg_stable_blkno, &bg_bh); | |
2158 | if (ret) { | |
2159 | mlog_errno(ret); | |
2160 | goto out; | |
2161 | } | |
2162 | ||
2163 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
2164 | chain = le16_to_cpu(bg->bg_chain); | |
2165 | ||
2166 | ret = ocfs2_alloc_dinode_update_counts(ac->ac_inode, handle, | |
2167 | ac->ac_bh, res->sr_bits, | |
2168 | chain); | |
2169 | if (ret) { | |
2170 | mlog_errno(ret); | |
2171 | goto out; | |
2172 | } | |
2173 | ||
2174 | ret = ocfs2_block_group_set_bits(handle, | |
2175 | ac->ac_inode, | |
2176 | bg, | |
2177 | bg_bh, | |
2178 | res->sr_bit_offset, | |
2179 | res->sr_bits); | |
2180 | if (ret < 0) { | |
db66c715 YL |
2181 | ocfs2_rollback_alloc_dinode_counts(ac->ac_inode, |
2182 | ac->ac_bh, res->sr_bits, chain); | |
e49e2767 MF |
2183 | mlog_errno(ret); |
2184 | goto out; | |
2185 | } | |
2186 | ||
2f73e135 TM |
2187 | trace_ocfs2_claim_new_inode_at_loc((unsigned long long)di_blkno, |
2188 | res->sr_bits); | |
e49e2767 MF |
2189 | |
2190 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); | |
2191 | ||
2192 | BUG_ON(res->sr_bits != 1); | |
2193 | ||
2194 | *suballoc_loc = res->sr_bg_blkno; | |
2195 | *suballoc_bit = res->sr_bit_offset; | |
2196 | ac->ac_bits_given++; | |
2197 | ocfs2_save_inode_ac_group(dir, ac); | |
2198 | ||
2199 | out: | |
2200 | brelse(bg_bh); | |
2201 | ||
2202 | return ret; | |
2203 | } | |
2204 | ||
1ed9b777 | 2205 | int ocfs2_claim_new_inode(handle_t *handle, |
13821151 TM |
2206 | struct inode *dir, |
2207 | struct buffer_head *parent_fe_bh, | |
ccd979bd | 2208 | struct ocfs2_alloc_context *ac, |
2b6cb576 | 2209 | u64 *suballoc_loc, |
ccd979bd MF |
2210 | u16 *suballoc_bit, |
2211 | u64 *fe_blkno) | |
2212 | { | |
2213 | int status; | |
2b6cb576 | 2214 | struct ocfs2_suballoc_result res; |
ccd979bd | 2215 | |
ccd979bd MF |
2216 | BUG_ON(!ac); |
2217 | BUG_ON(ac->ac_bits_given != 0); | |
2218 | BUG_ON(ac->ac_bits_wanted != 1); | |
2219 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
ccd979bd | 2220 | |
13821151 TM |
2221 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); |
2222 | ||
aa8f8e93 | 2223 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2224 | handle, |
ccd979bd MF |
2225 | 1, |
2226 | 1, | |
7d1fe093 | 2227 | &res); |
ccd979bd MF |
2228 | if (status < 0) { |
2229 | mlog_errno(status); | |
2230 | goto bail; | |
2231 | } | |
1ed9b777 | 2232 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2233 | |
7d1fe093 | 2234 | BUG_ON(res.sr_bits != 1); |
ccd979bd | 2235 | |
2b6cb576 | 2236 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2237 | *suballoc_bit = res.sr_bit_offset; |
ba206635 | 2238 | *fe_blkno = res.sr_blkno; |
ccd979bd | 2239 | ac->ac_bits_given++; |
13821151 | 2240 | ocfs2_save_inode_ac_group(dir, ac); |
ccd979bd MF |
2241 | status = 0; |
2242 | bail: | |
c1e8d35e TM |
2243 | if (status) |
2244 | mlog_errno(status); | |
ccd979bd MF |
2245 | return status; |
2246 | } | |
2247 | ||
2248 | /* translate a group desc. blkno and it's bitmap offset into | |
2249 | * disk cluster offset. */ | |
2250 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, | |
2251 | u64 bg_blkno, | |
2252 | u16 bg_bit_off) | |
2253 | { | |
2254 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2255 | u32 cluster = 0; | |
2256 | ||
2257 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2258 | ||
2259 | if (bg_blkno != osb->first_cluster_group_blkno) | |
2260 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); | |
2261 | cluster += (u32) bg_bit_off; | |
2262 | return cluster; | |
2263 | } | |
2264 | ||
2265 | /* given a cluster offset, calculate which block group it belongs to | |
2266 | * and return that block offset. */ | |
d659072f | 2267 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
ccd979bd MF |
2268 | { |
2269 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2270 | u32 group_no; | |
2271 | ||
2272 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2273 | ||
2274 | group_no = cluster / osb->bitmap_cpg; | |
2275 | if (!group_no) | |
2276 | return osb->first_cluster_group_blkno; | |
2277 | return ocfs2_clusters_to_blocks(inode->i_sb, | |
2278 | group_no * osb->bitmap_cpg); | |
2279 | } | |
2280 | ||
2281 | /* given the block number of a cluster start, calculate which cluster | |
2282 | * group and descriptor bitmap offset that corresponds to. */ | |
2283 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, | |
2284 | u64 data_blkno, | |
2285 | u64 *bg_blkno, | |
2286 | u16 *bg_bit_off) | |
2287 | { | |
2288 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2289 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); | |
2290 | ||
2291 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2292 | ||
2293 | *bg_blkno = ocfs2_which_cluster_group(inode, | |
2294 | data_cluster); | |
2295 | ||
2296 | if (*bg_blkno == osb->first_cluster_group_blkno) | |
2297 | *bg_bit_off = (u16) data_cluster; | |
2298 | else | |
2299 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, | |
2300 | data_blkno - *bg_blkno); | |
2301 | } | |
2302 | ||
2303 | /* | |
2304 | * min_bits - minimum contiguous chunk from this total allocation we | |
2305 | * can handle. set to what we asked for originally for a full | |
2306 | * contig. allocation, set to '1' to indicate we can deal with extents | |
2307 | * of any size. | |
2308 | */ | |
1ed9b777 | 2309 | int __ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2310 | struct ocfs2_alloc_context *ac, |
2311 | u32 min_clusters, | |
2312 | u32 max_clusters, | |
2313 | u32 *cluster_start, | |
2314 | u32 *num_clusters) | |
ccd979bd MF |
2315 | { |
2316 | int status; | |
415cb800 | 2317 | unsigned int bits_wanted = max_clusters; |
ba206635 | 2318 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
1ed9b777 | 2319 | struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); |
ccd979bd | 2320 | |
ccd979bd MF |
2321 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
2322 | ||
2323 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL | |
2324 | && ac->ac_which != OCFS2_AC_USE_MAIN); | |
ccd979bd MF |
2325 | |
2326 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { | |
33d5d380 MF |
2327 | WARN_ON(min_clusters > 1); |
2328 | ||
ccd979bd MF |
2329 | status = ocfs2_claim_local_alloc_bits(osb, |
2330 | handle, | |
2331 | ac, | |
2332 | bits_wanted, | |
2333 | cluster_start, | |
2334 | num_clusters); | |
2335 | if (!status) | |
2336 | atomic_inc(&osb->alloc_stats.local_data); | |
2337 | } else { | |
2338 | if (min_clusters > (osb->bitmap_cpg - 1)) { | |
2339 | /* The only paths asking for contiguousness | |
2340 | * should know about this already. */ | |
2fbe8d1e SM |
2341 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
2342 | "group bitmap size %u!\n", min_clusters, | |
2343 | osb->bitmap_cpg); | |
ccd979bd MF |
2344 | status = -ENOSPC; |
2345 | goto bail; | |
2346 | } | |
2347 | /* clamp the current request down to a realistic size. */ | |
2348 | if (bits_wanted > (osb->bitmap_cpg - 1)) | |
2349 | bits_wanted = osb->bitmap_cpg - 1; | |
2350 | ||
aa8f8e93 | 2351 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2352 | handle, |
ccd979bd MF |
2353 | bits_wanted, |
2354 | min_clusters, | |
7d1fe093 | 2355 | &res); |
ccd979bd | 2356 | if (!status) { |
ba206635 | 2357 | BUG_ON(res.sr_blkno); /* cluster alloc can't set */ |
ccd979bd MF |
2358 | *cluster_start = |
2359 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, | |
7d1fe093 JB |
2360 | res.sr_bg_blkno, |
2361 | res.sr_bit_offset); | |
ccd979bd | 2362 | atomic_inc(&osb->alloc_stats.bitmap_data); |
4711954e | 2363 | *num_clusters = res.sr_bits; |
ccd979bd MF |
2364 | } |
2365 | } | |
2366 | if (status < 0) { | |
2367 | if (status != -ENOSPC) | |
2368 | mlog_errno(status); | |
2369 | goto bail; | |
2370 | } | |
2371 | ||
4711954e | 2372 | ac->ac_bits_given += *num_clusters; |
ccd979bd MF |
2373 | |
2374 | bail: | |
c1e8d35e TM |
2375 | if (status) |
2376 | mlog_errno(status); | |
ccd979bd MF |
2377 | return status; |
2378 | } | |
2379 | ||
1ed9b777 | 2380 | int ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2381 | struct ocfs2_alloc_context *ac, |
2382 | u32 min_clusters, | |
2383 | u32 *cluster_start, | |
2384 | u32 *num_clusters) | |
2385 | { | |
2386 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; | |
2387 | ||
1ed9b777 | 2388 | return __ocfs2_claim_clusters(handle, ac, min_clusters, |
415cb800 MF |
2389 | bits_wanted, cluster_start, num_clusters); |
2390 | } | |
2391 | ||
b4414eea MF |
2392 | static int ocfs2_block_group_clear_bits(handle_t *handle, |
2393 | struct inode *alloc_inode, | |
2394 | struct ocfs2_group_desc *bg, | |
2395 | struct buffer_head *group_bh, | |
2396 | unsigned int bit_off, | |
2397 | unsigned int num_bits, | |
2398 | void (*undo_fn)(unsigned int bit, | |
2399 | unsigned long *bmap)) | |
ccd979bd MF |
2400 | { |
2401 | int status; | |
2402 | unsigned int tmp; | |
ccd979bd MF |
2403 | struct ocfs2_group_desc *undo_bg = NULL; |
2404 | ||
42035306 JB |
2405 | /* The caller got this descriptor from |
2406 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
2407 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd | 2408 | |
2f73e135 | 2409 | trace_ocfs2_block_group_clear_bits(bit_off, num_bits); |
ccd979bd | 2410 | |
b4414eea | 2411 | BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); |
0cf2f763 | 2412 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
b4414eea MF |
2413 | group_bh, |
2414 | undo_fn ? | |
2415 | OCFS2_JOURNAL_ACCESS_UNDO : | |
2416 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2417 | if (status < 0) { |
2418 | mlog_errno(status); | |
2419 | goto bail; | |
2420 | } | |
2421 | ||
b4414eea | 2422 | if (undo_fn) { |
94e41ecf SM |
2423 | jbd_lock_bh_state(group_bh); |
2424 | undo_bg = (struct ocfs2_group_desc *) | |
2425 | bh2jh(group_bh)->b_committed_data; | |
2426 | BUG_ON(!undo_bg); | |
2427 | } | |
ccd979bd MF |
2428 | |
2429 | tmp = num_bits; | |
2430 | while(tmp--) { | |
2431 | ocfs2_clear_bit((bit_off + tmp), | |
2432 | (unsigned long *) bg->bg_bitmap); | |
b4414eea MF |
2433 | if (undo_fn) |
2434 | undo_fn(bit_off + tmp, | |
2435 | (unsigned long *) undo_bg->bg_bitmap); | |
ccd979bd MF |
2436 | } |
2437 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); | |
9b5cd10e | 2438 | if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { |
e75ed71b CG |
2439 | if (undo_fn) |
2440 | jbd_unlock_bh_state(group_bh); | |
7ecef14a JP |
2441 | return ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit count %u but claims %u are freed. num_bits %d\n", |
2442 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
2443 | le16_to_cpu(bg->bg_bits), | |
2444 | le16_to_cpu(bg->bg_free_bits_count), | |
2445 | num_bits); | |
9b5cd10e | 2446 | } |
ccd979bd | 2447 | |
b4414eea | 2448 | if (undo_fn) |
94e41ecf SM |
2449 | jbd_unlock_bh_state(group_bh); |
2450 | ||
ec20cec7 | 2451 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
2452 | bail: |
2453 | return status; | |
2454 | } | |
2455 | ||
2456 | /* | |
2457 | * expects the suballoc inode to already be locked. | |
2458 | */ | |
b4414eea MF |
2459 | static int _ocfs2_free_suballoc_bits(handle_t *handle, |
2460 | struct inode *alloc_inode, | |
2461 | struct buffer_head *alloc_bh, | |
2462 | unsigned int start_bit, | |
2463 | u64 bg_blkno, | |
2464 | unsigned int count, | |
2465 | void (*undo_fn)(unsigned int bit, | |
2466 | unsigned long *bitmap)) | |
ccd979bd MF |
2467 | { |
2468 | int status = 0; | |
2469 | u32 tmp_used; | |
ccd979bd MF |
2470 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; |
2471 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; | |
2472 | struct buffer_head *group_bh = NULL; | |
2473 | struct ocfs2_group_desc *group; | |
2474 | ||
10995aa2 JB |
2475 | /* The alloc_bh comes from ocfs2_free_dinode() or |
2476 | * ocfs2_free_clusters(). The callers have all locked the | |
2477 | * allocator and gotten alloc_bh from the lock call. This | |
25985edc | 2478 | * validates the dinode buffer. Any corruption that has happened |
10995aa2 JB |
2479 | * is a code bug. */ |
2480 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
ccd979bd MF |
2481 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); |
2482 | ||
2f73e135 TM |
2483 | trace_ocfs2_free_suballoc_bits( |
2484 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, | |
2485 | (unsigned long long)bg_blkno, | |
2486 | start_bit, count); | |
ccd979bd | 2487 | |
68f64d47 JB |
2488 | status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, |
2489 | &group_bh); | |
ccd979bd MF |
2490 | if (status < 0) { |
2491 | mlog_errno(status); | |
2492 | goto bail; | |
2493 | } | |
ccd979bd | 2494 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
68f64d47 | 2495 | |
ccd979bd MF |
2496 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); |
2497 | ||
2498 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, | |
2499 | group, group_bh, | |
b4414eea | 2500 | start_bit, count, undo_fn); |
ccd979bd MF |
2501 | if (status < 0) { |
2502 | mlog_errno(status); | |
2503 | goto bail; | |
2504 | } | |
2505 | ||
0cf2f763 JB |
2506 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
2507 | alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2508 | if (status < 0) { |
2509 | mlog_errno(status); | |
a47726bc JQ |
2510 | ocfs2_block_group_set_bits(handle, alloc_inode, group, group_bh, |
2511 | start_bit, count); | |
ccd979bd MF |
2512 | goto bail; |
2513 | } | |
2514 | ||
2515 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, | |
2516 | count); | |
2517 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
2518 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); | |
ec20cec7 | 2519 | ocfs2_journal_dirty(handle, alloc_bh); |
ccd979bd MF |
2520 | |
2521 | bail: | |
a81cb88b | 2522 | brelse(group_bh); |
ccd979bd | 2523 | |
c1e8d35e TM |
2524 | if (status) |
2525 | mlog_errno(status); | |
ccd979bd MF |
2526 | return status; |
2527 | } | |
2528 | ||
b4414eea MF |
2529 | int ocfs2_free_suballoc_bits(handle_t *handle, |
2530 | struct inode *alloc_inode, | |
2531 | struct buffer_head *alloc_bh, | |
2532 | unsigned int start_bit, | |
2533 | u64 bg_blkno, | |
2534 | unsigned int count) | |
2535 | { | |
2536 | return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, | |
2537 | start_bit, bg_blkno, count, NULL); | |
2538 | } | |
2539 | ||
1fabe148 | 2540 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
2541 | struct inode *inode_alloc_inode, |
2542 | struct buffer_head *inode_alloc_bh, | |
2543 | struct ocfs2_dinode *di) | |
2544 | { | |
2545 | u64 blk = le64_to_cpu(di->i_blkno); | |
2546 | u16 bit = le16_to_cpu(di->i_suballoc_bit); | |
2547 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2548 | ||
74380c47 TM |
2549 | if (di->i_suballoc_loc) |
2550 | bg_blkno = le64_to_cpu(di->i_suballoc_loc); | |
ccd979bd MF |
2551 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, |
2552 | inode_alloc_bh, bit, bg_blkno, 1); | |
2553 | } | |
2554 | ||
b4414eea MF |
2555 | static int _ocfs2_free_clusters(handle_t *handle, |
2556 | struct inode *bitmap_inode, | |
2557 | struct buffer_head *bitmap_bh, | |
2558 | u64 start_blk, | |
2559 | unsigned int num_clusters, | |
2560 | void (*undo_fn)(unsigned int bit, | |
2561 | unsigned long *bitmap)) | |
ccd979bd MF |
2562 | { |
2563 | int status; | |
2564 | u16 bg_start_bit; | |
2565 | u64 bg_blkno; | |
ccd979bd MF |
2566 | |
2567 | /* You can't ever have a contiguous set of clusters | |
2568 | * bigger than a block group bitmap so we never have to worry | |
ef6b689b TM |
2569 | * about looping on them. |
2570 | * This is expensive. We can safely remove once this stuff has | |
ccd979bd | 2571 | * gotten tested really well. */ |
dd7b5f9d CG |
2572 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, |
2573 | ocfs2_blocks_to_clusters(bitmap_inode->i_sb, | |
2574 | start_blk))); | |
ccd979bd | 2575 | |
ccd979bd MF |
2576 | |
2577 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, | |
2578 | &bg_start_bit); | |
2579 | ||
2f73e135 TM |
2580 | trace_ocfs2_free_clusters((unsigned long long)bg_blkno, |
2581 | (unsigned long long)start_blk, | |
2582 | bg_start_bit, num_clusters); | |
ccd979bd | 2583 | |
b4414eea MF |
2584 | status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, |
2585 | bg_start_bit, bg_blkno, | |
2586 | num_clusters, undo_fn); | |
9c7af40b | 2587 | if (status < 0) { |
ccd979bd | 2588 | mlog_errno(status); |
9c7af40b MF |
2589 | goto out; |
2590 | } | |
2591 | ||
2592 | ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), | |
2593 | num_clusters); | |
ccd979bd | 2594 | |
9c7af40b | 2595 | out: |
c1e8d35e TM |
2596 | if (status) |
2597 | mlog_errno(status); | |
ccd979bd MF |
2598 | return status; |
2599 | } | |
2600 | ||
b4414eea MF |
2601 | int ocfs2_free_clusters(handle_t *handle, |
2602 | struct inode *bitmap_inode, | |
2603 | struct buffer_head *bitmap_bh, | |
2604 | u64 start_blk, | |
2605 | unsigned int num_clusters) | |
2606 | { | |
2607 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2608 | start_blk, num_clusters, | |
2609 | _ocfs2_set_bit); | |
2610 | } | |
2611 | ||
2612 | /* | |
2613 | * Give never-used clusters back to the global bitmap. We don't need | |
2614 | * to protect these bits in the undo buffer. | |
2615 | */ | |
2616 | int ocfs2_release_clusters(handle_t *handle, | |
2617 | struct inode *bitmap_inode, | |
2618 | struct buffer_head *bitmap_bh, | |
2619 | u64 start_blk, | |
2620 | unsigned int num_clusters) | |
2621 | { | |
2622 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2623 | start_blk, num_clusters, | |
2624 | _ocfs2_clear_bit); | |
2625 | } | |
2626 | ||
e7d4cb6b TM |
2627 | /* |
2628 | * For a given allocation, determine which allocators will need to be | |
2629 | * accessed, and lock them, reserving the appropriate number of bits. | |
2630 | * | |
2631 | * Sparse file systems call this from ocfs2_write_begin_nolock() | |
2632 | * and ocfs2_allocate_unwritten_extents(). | |
2633 | * | |
2634 | * File systems which don't support holes call this from | |
2635 | * ocfs2_extend_allocation(). | |
2636 | */ | |
f99b9b7c JB |
2637 | int ocfs2_lock_allocators(struct inode *inode, |
2638 | struct ocfs2_extent_tree *et, | |
e7d4cb6b TM |
2639 | u32 clusters_to_add, u32 extents_to_split, |
2640 | struct ocfs2_alloc_context **data_ac, | |
f99b9b7c | 2641 | struct ocfs2_alloc_context **meta_ac) |
e7d4cb6b TM |
2642 | { |
2643 | int ret = 0, num_free_extents; | |
2644 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; | |
2645 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2646 | ||
2647 | *meta_ac = NULL; | |
2648 | if (data_ac) | |
2649 | *data_ac = NULL; | |
2650 | ||
2651 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); | |
2652 | ||
964f14a0 | 2653 | num_free_extents = ocfs2_num_free_extents(et); |
e7d4cb6b TM |
2654 | if (num_free_extents < 0) { |
2655 | ret = num_free_extents; | |
2656 | mlog_errno(ret); | |
2657 | goto out; | |
2658 | } | |
2659 | ||
2660 | /* | |
2661 | * Sparse allocation file systems need to be more conservative | |
2662 | * with reserving room for expansion - the actual allocation | |
2663 | * happens while we've got a journal handle open so re-taking | |
2664 | * a cluster lock (because we ran out of room for another | |
2665 | * extent) will violate ordering rules. | |
2666 | * | |
2667 | * Most of the time we'll only be seeing this 1 cluster at a time | |
2668 | * anyway. | |
2669 | * | |
2670 | * Always lock for any unwritten extents - we might want to | |
2671 | * add blocks during a split. | |
2672 | */ | |
2673 | if (!num_free_extents || | |
2674 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { | |
f99b9b7c | 2675 | ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); |
e7d4cb6b TM |
2676 | if (ret < 0) { |
2677 | if (ret != -ENOSPC) | |
2678 | mlog_errno(ret); | |
2679 | goto out; | |
2680 | } | |
2681 | } | |
2682 | ||
2683 | if (clusters_to_add == 0) | |
2684 | goto out; | |
2685 | ||
2686 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); | |
2687 | if (ret < 0) { | |
2688 | if (ret != -ENOSPC) | |
2689 | mlog_errno(ret); | |
2690 | goto out; | |
2691 | } | |
2692 | ||
2693 | out: | |
2694 | if (ret) { | |
2695 | if (*meta_ac) { | |
2696 | ocfs2_free_alloc_context(*meta_ac); | |
2697 | *meta_ac = NULL; | |
2698 | } | |
2699 | ||
2700 | /* | |
2701 | * We cannot have an error and a non null *data_ac. | |
2702 | */ | |
2703 | } | |
2704 | ||
2705 | return ret; | |
2706 | } | |
6ca497a8 | 2707 | |
2708 | /* | |
2709 | * Read the inode specified by blkno to get suballoc_slot and | |
2710 | * suballoc_bit. | |
2711 | */ | |
2712 | static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, | |
889f004a TM |
2713 | u16 *suballoc_slot, u64 *group_blkno, |
2714 | u16 *suballoc_bit) | |
6ca497a8 | 2715 | { |
2716 | int status; | |
2717 | struct buffer_head *inode_bh = NULL; | |
2718 | struct ocfs2_dinode *inode_fe; | |
2719 | ||
2f73e135 | 2720 | trace_ocfs2_get_suballoc_slot_bit((unsigned long long)blkno); |
6ca497a8 | 2721 | |
2722 | /* dirty read disk */ | |
2723 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); | |
2724 | if (status < 0) { | |
5b09b507 JB |
2725 | mlog(ML_ERROR, "read block %llu failed %d\n", |
2726 | (unsigned long long)blkno, status); | |
6ca497a8 | 2727 | goto bail; |
2728 | } | |
2729 | ||
2730 | inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; | |
2731 | if (!OCFS2_IS_VALID_DINODE(inode_fe)) { | |
5b09b507 JB |
2732 | mlog(ML_ERROR, "invalid inode %llu requested\n", |
2733 | (unsigned long long)blkno); | |
6ca497a8 | 2734 | status = -EINVAL; |
2735 | goto bail; | |
2736 | } | |
2737 | ||
0fba8137 | 2738 | if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && |
6ca497a8 | 2739 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { |
2740 | mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", | |
5b09b507 JB |
2741 | (unsigned long long)blkno, |
2742 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); | |
6ca497a8 | 2743 | status = -EINVAL; |
2744 | goto bail; | |
2745 | } | |
2746 | ||
2747 | if (suballoc_slot) | |
2748 | *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); | |
2749 | if (suballoc_bit) | |
2750 | *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); | |
889f004a TM |
2751 | if (group_blkno) |
2752 | *group_blkno = le64_to_cpu(inode_fe->i_suballoc_loc); | |
6ca497a8 | 2753 | |
2754 | bail: | |
2755 | brelse(inode_bh); | |
2756 | ||
c1e8d35e TM |
2757 | if (status) |
2758 | mlog_errno(status); | |
6ca497a8 | 2759 | return status; |
2760 | } | |
2761 | ||
2762 | /* | |
2763 | * test whether bit is SET in allocator bitmap or not. on success, 0 | |
2764 | * is returned and *res is 1 for SET; 0 otherwise. when fails, errno | |
2765 | * is returned and *res is meaningless. Call this after you have | |
2766 | * cluster locked against suballoc, or you may get a result based on | |
2767 | * non-up2date contents | |
2768 | */ | |
2769 | static int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, | |
2770 | struct inode *suballoc, | |
889f004a TM |
2771 | struct buffer_head *alloc_bh, |
2772 | u64 group_blkno, u64 blkno, | |
6ca497a8 | 2773 | u16 bit, int *res) |
2774 | { | |
abf1b3cb | 2775 | struct ocfs2_dinode *alloc_di; |
6ca497a8 | 2776 | struct ocfs2_group_desc *group; |
2777 | struct buffer_head *group_bh = NULL; | |
2778 | u64 bg_blkno; | |
2779 | int status; | |
2780 | ||
2f73e135 TM |
2781 | trace_ocfs2_test_suballoc_bit((unsigned long long)blkno, |
2782 | (unsigned int)bit); | |
6ca497a8 | 2783 | |
abf1b3cb TM |
2784 | alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data; |
2785 | if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) { | |
6ca497a8 | 2786 | mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", |
2787 | (unsigned int)bit, | |
abf1b3cb | 2788 | ocfs2_bits_per_group(&alloc_di->id2.i_chain)); |
6ca497a8 | 2789 | status = -EINVAL; |
2790 | goto bail; | |
2791 | } | |
2792 | ||
889f004a TM |
2793 | bg_blkno = group_blkno ? group_blkno : |
2794 | ocfs2_which_suballoc_group(blkno, bit); | |
abf1b3cb | 2795 | status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno, |
6ca497a8 | 2796 | &group_bh); |
2797 | if (status < 0) { | |
5b09b507 JB |
2798 | mlog(ML_ERROR, "read group %llu failed %d\n", |
2799 | (unsigned long long)bg_blkno, status); | |
6ca497a8 | 2800 | goto bail; |
2801 | } | |
2802 | ||
2803 | group = (struct ocfs2_group_desc *) group_bh->b_data; | |
2804 | *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); | |
2805 | ||
2806 | bail: | |
2807 | brelse(group_bh); | |
2808 | ||
c1e8d35e TM |
2809 | if (status) |
2810 | mlog_errno(status); | |
6ca497a8 | 2811 | return status; |
2812 | } | |
2813 | ||
2814 | /* | |
2815 | * Test if the bit representing this inode (blkno) is set in the | |
2816 | * suballocator. | |
2817 | * | |
2818 | * On success, 0 is returned and *res is 1 for SET; 0 otherwise. | |
2819 | * | |
2820 | * In the event of failure, a negative value is returned and *res is | |
2821 | * meaningless. | |
2822 | * | |
2823 | * Callers must make sure to hold nfs_sync_lock to prevent | |
2824 | * ocfs2_delete_inode() on another node from accessing the same | |
2825 | * suballocator concurrently. | |
2826 | */ | |
2827 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) | |
2828 | { | |
2829 | int status; | |
889f004a | 2830 | u64 group_blkno = 0; |
6ca497a8 | 2831 | u16 suballoc_bit = 0, suballoc_slot = 0; |
2832 | struct inode *inode_alloc_inode; | |
2833 | struct buffer_head *alloc_bh = NULL; | |
2834 | ||
2f73e135 | 2835 | trace_ocfs2_test_inode_bit((unsigned long long)blkno); |
6ca497a8 | 2836 | |
2837 | status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, | |
889f004a | 2838 | &group_blkno, &suballoc_bit); |
6ca497a8 | 2839 | if (status < 0) { |
2840 | mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); | |
2841 | goto bail; | |
2842 | } | |
2843 | ||
2844 | inode_alloc_inode = | |
2845 | ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE, | |
2846 | suballoc_slot); | |
2847 | if (!inode_alloc_inode) { | |
2848 | /* the error code could be inaccurate, but we are not able to | |
2849 | * get the correct one. */ | |
2850 | status = -EINVAL; | |
2851 | mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", | |
2852 | (u32)suballoc_slot); | |
2853 | goto bail; | |
2854 | } | |
2855 | ||
5955102c | 2856 | inode_lock(inode_alloc_inode); |
6ca497a8 | 2857 | status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); |
2858 | if (status < 0) { | |
5955102c | 2859 | inode_unlock(inode_alloc_inode); |
7dc3e839 | 2860 | iput(inode_alloc_inode); |
6ca497a8 | 2861 | mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", |
2862 | (u32)suballoc_slot, status); | |
2863 | goto bail; | |
2864 | } | |
2865 | ||
2866 | status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, | |
889f004a | 2867 | group_blkno, blkno, suballoc_bit, res); |
6ca497a8 | 2868 | if (status < 0) |
2869 | mlog(ML_ERROR, "test suballoc bit failed %d\n", status); | |
2870 | ||
2871 | ocfs2_inode_unlock(inode_alloc_inode, 0); | |
5955102c | 2872 | inode_unlock(inode_alloc_inode); |
6ca497a8 | 2873 | |
2874 | iput(inode_alloc_inode); | |
2875 | brelse(alloc_bh); | |
2876 | bail: | |
c1e8d35e TM |
2877 | if (status) |
2878 | mlog_errno(status); | |
6ca497a8 | 2879 | return status; |
2880 | } |