Commit | Line | Data |
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328970de | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
fa60ce2c | 2 | /* |
ccd979bd MF |
3 | * suballoc.c |
4 | * | |
5 | * metadata alloc and free | |
6 | * Inspired by ext3 block groups. | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
9 | */ |
10 | ||
11 | #include <linux/fs.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/highmem.h> | |
15 | ||
ccd979bd MF |
16 | #include <cluster/masklog.h> |
17 | ||
18 | #include "ocfs2.h" | |
19 | ||
20 | #include "alloc.h" | |
d6b32bbb | 21 | #include "blockcheck.h" |
ccd979bd MF |
22 | #include "dlmglue.h" |
23 | #include "inode.h" | |
24 | #include "journal.h" | |
25 | #include "localalloc.h" | |
26 | #include "suballoc.h" | |
27 | #include "super.h" | |
28 | #include "sysfile.h" | |
29 | #include "uptodate.h" | |
2f73e135 | 30 | #include "ocfs2_trace.h" |
ccd979bd MF |
31 | |
32 | #include "buffer_head_io.h" | |
33 | ||
ffda89a3 | 34 | #define NOT_ALLOC_NEW_GROUP 0 |
60ca81e8 TM |
35 | #define ALLOC_NEW_GROUP 0x1 |
36 | #define ALLOC_GROUPS_FROM_GLOBAL 0x2 | |
ffda89a3 | 37 | |
b89c5428 | 38 | #define OCFS2_MAX_TO_STEAL 1024 |
4d0ddb2c | 39 | |
7d1fe093 | 40 | struct ocfs2_suballoc_result { |
2b6cb576 JB |
41 | u64 sr_bg_blkno; /* The bg we allocated from. Set |
42 | to 0 when a block group is | |
43 | contiguous. */ | |
e49e2767 MF |
44 | u64 sr_bg_stable_blkno; /* |
45 | * Doesn't change, always | |
46 | * set to target block | |
47 | * group descriptor | |
48 | * block. | |
49 | */ | |
ba206635 | 50 | u64 sr_blkno; /* The first allocated block */ |
7d1fe093 JB |
51 | unsigned int sr_bit_offset; /* The bit in the bg */ |
52 | unsigned int sr_bits; /* How many bits we claimed */ | |
53 | }; | |
54 | ||
b2b6ebf5 MF |
55 | static u64 ocfs2_group_from_res(struct ocfs2_suballoc_result *res) |
56 | { | |
57 | if (res->sr_blkno == 0) | |
58 | return 0; | |
59 | ||
60 | if (res->sr_bg_blkno) | |
61 | return res->sr_bg_blkno; | |
62 | ||
63 | return ocfs2_which_suballoc_group(res->sr_blkno, res->sr_bit_offset); | |
64 | } | |
65 | ||
ccd979bd | 66 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl); |
1fabe148 | 67 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
68 | struct inode *alloc_inode, |
69 | struct buffer_head *bg_bh, | |
70 | u64 group_blkno, | |
798db35f | 71 | unsigned int group_clusters, |
ccd979bd MF |
72 | u16 my_chain, |
73 | struct ocfs2_chain_list *cl); | |
74 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
75 | struct inode *alloc_inode, | |
1187c968 | 76 | struct buffer_head *bh, |
60ca81e8 | 77 | u64 max_block, |
feb473a6 | 78 | u64 *last_alloc_group, |
60ca81e8 | 79 | int flags); |
ccd979bd | 80 | |
ccd979bd MF |
81 | static int ocfs2_cluster_group_search(struct inode *inode, |
82 | struct buffer_head *group_bh, | |
83 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 84 | u64 max_block, |
7d1fe093 | 85 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
86 | static int ocfs2_block_group_search(struct inode *inode, |
87 | struct buffer_head *group_bh, | |
88 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 89 | u64 max_block, |
7d1fe093 | 90 | struct ocfs2_suballoc_result *res); |
aa8f8e93 | 91 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 92 | handle_t *handle, |
ccd979bd MF |
93 | u32 bits_wanted, |
94 | u32 min_bits, | |
7d1fe093 | 95 | struct ocfs2_suballoc_result *res); |
ccd979bd MF |
96 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, |
97 | int nr); | |
1fabe148 | 98 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
99 | struct inode *alloc_inode, |
100 | struct buffer_head *fe_bh, | |
101 | struct buffer_head *bg_bh, | |
102 | struct buffer_head *prev_bg_bh, | |
103 | u16 chain); | |
104 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
105 | u32 wanted); | |
ccd979bd MF |
106 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, |
107 | u64 bg_blkno, | |
108 | u16 bg_bit_off); | |
ccd979bd MF |
109 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, |
110 | u64 data_blkno, | |
111 | u64 *bg_blkno, | |
112 | u16 *bg_bit_off); | |
1187c968 JB |
113 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
114 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 115 | int flags, |
1187c968 | 116 | struct ocfs2_alloc_context **ac); |
ccd979bd | 117 | |
9c7af40b | 118 | void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac) |
ccd979bd | 119 | { |
da5cbf2f MF |
120 | struct inode *inode = ac->ac_inode; |
121 | ||
122 | if (inode) { | |
123 | if (ac->ac_which != OCFS2_AC_USE_LOCAL) | |
e63aecb6 | 124 | ocfs2_inode_unlock(inode, 1); |
da5cbf2f | 125 | |
5955102c | 126 | inode_unlock(inode); |
da5cbf2f MF |
127 | |
128 | iput(inode); | |
4d0ddb2c | 129 | ac->ac_inode = NULL; |
da5cbf2f | 130 | } |
a81cb88b MF |
131 | brelse(ac->ac_bh); |
132 | ac->ac_bh = NULL; | |
e3b4a97d | 133 | ac->ac_resv = NULL; |
46359295 JQ |
134 | kfree(ac->ac_find_loc_priv); |
135 | ac->ac_find_loc_priv = NULL; | |
4d0ddb2c TM |
136 | } |
137 | ||
138 | void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac) | |
139 | { | |
140 | ocfs2_free_ac_resource(ac); | |
ccd979bd MF |
141 | kfree(ac); |
142 | } | |
143 | ||
144 | static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl) | |
145 | { | |
146 | return (u32)le16_to_cpu(cl->cl_cpg) * (u32)le16_to_cpu(cl->cl_bpc); | |
147 | } | |
148 | ||
57e3e797 | 149 | #define do_error(fmt, ...) \ |
7ecef14a JP |
150 | do { \ |
151 | if (resize) \ | |
152 | mlog(ML_ERROR, fmt, ##__VA_ARGS__); \ | |
153 | else \ | |
154 | return ocfs2_error(sb, fmt, ##__VA_ARGS__); \ | |
155 | } while (0) | |
57e3e797 | 156 | |
970e4936 JB |
157 | static int ocfs2_validate_gd_self(struct super_block *sb, |
158 | struct buffer_head *bh, | |
78c37eb0 | 159 | int resize) |
970e4936 JB |
160 | { |
161 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
162 | ||
7bf72ede | 163 | if (!OCFS2_IS_VALID_GROUP_DESC(gd)) { |
7ecef14a | 164 | do_error("Group descriptor #%llu has bad signature %.*s\n", |
68f64d47 | 165 | (unsigned long long)bh->b_blocknr, 7, |
57e3e797 | 166 | gd->bg_signature); |
7bf72ede MF |
167 | } |
168 | ||
68f64d47 | 169 | if (le64_to_cpu(gd->bg_blkno) != bh->b_blocknr) { |
7ecef14a | 170 | do_error("Group descriptor #%llu has an invalid bg_blkno of %llu\n", |
68f64d47 JB |
171 | (unsigned long long)bh->b_blocknr, |
172 | (unsigned long long)le64_to_cpu(gd->bg_blkno)); | |
68f64d47 JB |
173 | } |
174 | ||
175 | if (le32_to_cpu(gd->bg_generation) != OCFS2_SB(sb)->fs_generation) { | |
7ecef14a | 176 | do_error("Group descriptor #%llu has an invalid fs_generation of #%u\n", |
68f64d47 JB |
177 | (unsigned long long)bh->b_blocknr, |
178 | le32_to_cpu(gd->bg_generation)); | |
68f64d47 JB |
179 | } |
180 | ||
970e4936 | 181 | if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) { |
7ecef14a | 182 | do_error("Group descriptor #%llu has bit count %u but claims that %u are free\n", |
970e4936 JB |
183 | (unsigned long long)bh->b_blocknr, |
184 | le16_to_cpu(gd->bg_bits), | |
185 | le16_to_cpu(gd->bg_free_bits_count)); | |
970e4936 JB |
186 | } |
187 | ||
188 | if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) { | |
7ecef14a | 189 | do_error("Group descriptor #%llu has bit count %u but max bitmap bits of %u\n", |
970e4936 JB |
190 | (unsigned long long)bh->b_blocknr, |
191 | le16_to_cpu(gd->bg_bits), | |
192 | 8 * le16_to_cpu(gd->bg_size)); | |
970e4936 JB |
193 | } |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | static int ocfs2_validate_gd_parent(struct super_block *sb, | |
199 | struct ocfs2_dinode *di, | |
200 | struct buffer_head *bh, | |
78c37eb0 | 201 | int resize) |
970e4936 JB |
202 | { |
203 | unsigned int max_bits; | |
204 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
205 | ||
7bf72ede | 206 | if (di->i_blkno != gd->bg_parent_dinode) { |
7ecef14a | 207 | do_error("Group descriptor #%llu has bad parent pointer (%llu, expected %llu)\n", |
68f64d47 | 208 | (unsigned long long)bh->b_blocknr, |
57e3e797 JB |
209 | (unsigned long long)le64_to_cpu(gd->bg_parent_dinode), |
210 | (unsigned long long)le64_to_cpu(di->i_blkno)); | |
7bf72ede MF |
211 | } |
212 | ||
213 | max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc); | |
214 | if (le16_to_cpu(gd->bg_bits) > max_bits) { | |
7ecef14a | 215 | do_error("Group descriptor #%llu has bit count of %u\n", |
68f64d47 | 216 | (unsigned long long)bh->b_blocknr, |
57e3e797 | 217 | le16_to_cpu(gd->bg_bits)); |
7bf72ede MF |
218 | } |
219 | ||
78c37eb0 TM |
220 | /* In resize, we may meet the case bg_chain == cl_next_free_rec. */ |
221 | if ((le16_to_cpu(gd->bg_chain) > | |
222 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) || | |
223 | ((le16_to_cpu(gd->bg_chain) == | |
224 | le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) && !resize)) { | |
7ecef14a | 225 | do_error("Group descriptor #%llu has bad chain %u\n", |
68f64d47 | 226 | (unsigned long long)bh->b_blocknr, |
57e3e797 | 227 | le16_to_cpu(gd->bg_chain)); |
7bf72ede MF |
228 | } |
229 | ||
970e4936 JB |
230 | return 0; |
231 | } | |
7bf72ede | 232 | |
57e3e797 | 233 | #undef do_error |
7bf72ede | 234 | |
970e4936 JB |
235 | /* |
236 | * This version only prints errors. It does not fail the filesystem, and | |
237 | * exists only for resize. | |
238 | */ | |
239 | int ocfs2_check_group_descriptor(struct super_block *sb, | |
240 | struct ocfs2_dinode *di, | |
241 | struct buffer_head *bh) | |
242 | { | |
243 | int rc; | |
d6b32bbb JB |
244 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; |
245 | ||
246 | BUG_ON(!buffer_uptodate(bh)); | |
970e4936 | 247 | |
d6b32bbb JB |
248 | /* |
249 | * If the ecc fails, we return the error but otherwise | |
250 | * leave the filesystem running. We know any error is | |
251 | * local to this block. | |
252 | */ | |
253 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
13723d00 JB |
254 | if (rc) { |
255 | mlog(ML_ERROR, | |
256 | "Checksum failed for group descriptor %llu\n", | |
257 | (unsigned long long)bh->b_blocknr); | |
258 | } else | |
d6b32bbb | 259 | rc = ocfs2_validate_gd_self(sb, bh, 1); |
970e4936 JB |
260 | if (!rc) |
261 | rc = ocfs2_validate_gd_parent(sb, di, bh, 1); | |
262 | ||
263 | return rc; | |
264 | } | |
265 | ||
266 | static int ocfs2_validate_group_descriptor(struct super_block *sb, | |
267 | struct buffer_head *bh) | |
268 | { | |
d6b32bbb JB |
269 | int rc; |
270 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
271 | ||
2f73e135 TM |
272 | trace_ocfs2_validate_group_descriptor( |
273 | (unsigned long long)bh->b_blocknr); | |
970e4936 | 274 | |
d6b32bbb JB |
275 | BUG_ON(!buffer_uptodate(bh)); |
276 | ||
277 | /* | |
278 | * If the ecc fails, we return the error but otherwise | |
279 | * leave the filesystem running. We know any error is | |
280 | * local to this block. | |
281 | */ | |
282 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check); | |
283 | if (rc) | |
284 | return rc; | |
285 | ||
286 | /* | |
287 | * Errors after here are fatal. | |
288 | */ | |
289 | ||
970e4936 | 290 | return ocfs2_validate_gd_self(sb, bh, 0); |
7bf72ede MF |
291 | } |
292 | ||
68f64d47 JB |
293 | int ocfs2_read_group_descriptor(struct inode *inode, struct ocfs2_dinode *di, |
294 | u64 gd_blkno, struct buffer_head **bh) | |
295 | { | |
296 | int rc; | |
297 | struct buffer_head *tmp = *bh; | |
298 | ||
8cb471e8 | 299 | rc = ocfs2_read_block(INODE_CACHE(inode), gd_blkno, &tmp, |
970e4936 | 300 | ocfs2_validate_group_descriptor); |
68f64d47 JB |
301 | if (rc) |
302 | goto out; | |
303 | ||
970e4936 | 304 | rc = ocfs2_validate_gd_parent(inode->i_sb, di, tmp, 0); |
68f64d47 JB |
305 | if (rc) { |
306 | brelse(tmp); | |
307 | goto out; | |
308 | } | |
309 | ||
310 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
311 | if (!*bh) | |
312 | *bh = tmp; | |
313 | ||
314 | out: | |
315 | return rc; | |
316 | } | |
317 | ||
798db35f JB |
318 | static void ocfs2_bg_discontig_add_extent(struct ocfs2_super *osb, |
319 | struct ocfs2_group_desc *bg, | |
320 | struct ocfs2_chain_list *cl, | |
47dea423 | 321 | u64 p_blkno, unsigned int clusters) |
798db35f JB |
322 | { |
323 | struct ocfs2_extent_list *el = &bg->bg_list; | |
324 | struct ocfs2_extent_rec *rec; | |
325 | ||
4711954e | 326 | BUG_ON(!ocfs2_supports_discontig_bg(osb)); |
798db35f JB |
327 | if (!el->l_next_free_rec) |
328 | el->l_count = cpu_to_le16(ocfs2_extent_recs_per_gd(osb->sb)); | |
329 | rec = &el->l_recs[le16_to_cpu(el->l_next_free_rec)]; | |
4711954e | 330 | rec->e_blkno = cpu_to_le64(p_blkno); |
798db35f JB |
331 | rec->e_cpos = cpu_to_le32(le16_to_cpu(bg->bg_bits) / |
332 | le16_to_cpu(cl->cl_bpc)); | |
47dea423 | 333 | rec->e_leaf_clusters = cpu_to_le16(clusters); |
798db35f | 334 | le16_add_cpu(&bg->bg_bits, clusters * le16_to_cpu(cl->cl_bpc)); |
4711954e TM |
335 | le16_add_cpu(&bg->bg_free_bits_count, |
336 | clusters * le16_to_cpu(cl->cl_bpc)); | |
798db35f JB |
337 | le16_add_cpu(&el->l_next_free_rec, 1); |
338 | } | |
339 | ||
1fabe148 | 340 | static int ocfs2_block_group_fill(handle_t *handle, |
ccd979bd MF |
341 | struct inode *alloc_inode, |
342 | struct buffer_head *bg_bh, | |
343 | u64 group_blkno, | |
798db35f | 344 | unsigned int group_clusters, |
ccd979bd MF |
345 | u16 my_chain, |
346 | struct ocfs2_chain_list *cl) | |
347 | { | |
348 | int status = 0; | |
798db35f | 349 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); |
ccd979bd MF |
350 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
351 | struct super_block * sb = alloc_inode->i_sb; | |
352 | ||
ccd979bd | 353 | if (((unsigned long long) bg_bh->b_blocknr) != group_blkno) { |
7ecef14a JP |
354 | status = ocfs2_error(alloc_inode->i_sb, |
355 | "group block (%llu) != b_blocknr (%llu)\n", | |
356 | (unsigned long long)group_blkno, | |
357 | (unsigned long long) bg_bh->b_blocknr); | |
ccd979bd MF |
358 | goto bail; |
359 | } | |
360 | ||
13723d00 | 361 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 362 | INODE_CACHE(alloc_inode), |
13723d00 JB |
363 | bg_bh, |
364 | OCFS2_JOURNAL_ACCESS_CREATE); | |
ccd979bd MF |
365 | if (status < 0) { |
366 | mlog_errno(status); | |
367 | goto bail; | |
368 | } | |
369 | ||
370 | memset(bg, 0, sb->s_blocksize); | |
371 | strcpy(bg->bg_signature, OCFS2_GROUP_DESC_SIGNATURE); | |
1119d3c0 | 372 | bg->bg_generation = cpu_to_le32(osb->fs_generation); |
8571882c TM |
373 | bg->bg_size = cpu_to_le16(ocfs2_group_bitmap_size(sb, 1, |
374 | osb->s_feature_incompat)); | |
ccd979bd MF |
375 | bg->bg_chain = cpu_to_le16(my_chain); |
376 | bg->bg_next_group = cl->cl_recs[my_chain].c_blkno; | |
377 | bg->bg_parent_dinode = cpu_to_le64(OCFS2_I(alloc_inode)->ip_blkno); | |
378 | bg->bg_blkno = cpu_to_le64(group_blkno); | |
798db35f JB |
379 | if (group_clusters == le16_to_cpu(cl->cl_cpg)) |
380 | bg->bg_bits = cpu_to_le16(ocfs2_bits_per_group(cl)); | |
381 | else | |
4711954e | 382 | ocfs2_bg_discontig_add_extent(osb, bg, cl, group_blkno, |
798db35f JB |
383 | group_clusters); |
384 | ||
ccd979bd MF |
385 | /* set the 1st bit in the bitmap to account for the descriptor block */ |
386 | ocfs2_set_bit(0, (unsigned long *)bg->bg_bitmap); | |
387 | bg->bg_free_bits_count = cpu_to_le16(le16_to_cpu(bg->bg_bits) - 1); | |
388 | ||
ec20cec7 | 389 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd MF |
390 | |
391 | /* There is no need to zero out or otherwise initialize the | |
392 | * other blocks in a group - All valid FS metadata in a block | |
393 | * group stores the superblock fs_generation value at | |
394 | * allocation time. */ | |
395 | ||
396 | bail: | |
c1e8d35e TM |
397 | if (status) |
398 | mlog_errno(status); | |
ccd979bd MF |
399 | return status; |
400 | } | |
401 | ||
402 | static inline u16 ocfs2_find_smallest_chain(struct ocfs2_chain_list *cl) | |
403 | { | |
404 | u16 curr, best; | |
405 | ||
406 | best = curr = 0; | |
407 | while (curr < le16_to_cpu(cl->cl_count)) { | |
408 | if (le32_to_cpu(cl->cl_recs[best].c_total) > | |
409 | le32_to_cpu(cl->cl_recs[curr].c_total)) | |
410 | best = curr; | |
411 | curr++; | |
412 | } | |
413 | return best; | |
414 | } | |
415 | ||
798db35f JB |
416 | static struct buffer_head * |
417 | ocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle, | |
418 | struct inode *alloc_inode, | |
419 | struct ocfs2_alloc_context *ac, | |
420 | struct ocfs2_chain_list *cl) | |
421 | { | |
422 | int status; | |
423 | u32 bit_off, num_bits; | |
424 | u64 bg_blkno; | |
425 | struct buffer_head *bg_bh; | |
426 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
427 | ||
1ed9b777 | 428 | status = ocfs2_claim_clusters(handle, ac, |
798db35f JB |
429 | le16_to_cpu(cl->cl_cpg), &bit_off, |
430 | &num_bits); | |
431 | if (status < 0) { | |
432 | if (status != -ENOSPC) | |
433 | mlog_errno(status); | |
434 | goto bail; | |
435 | } | |
436 | ||
437 | /* setup the group */ | |
438 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
2f73e135 TM |
439 | trace_ocfs2_block_group_alloc_contig( |
440 | (unsigned long long)bg_blkno, alloc_rec); | |
798db35f JB |
441 | |
442 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
443 | if (!bg_bh) { | |
7391a294 | 444 | status = -ENOMEM; |
798db35f JB |
445 | mlog_errno(status); |
446 | goto bail; | |
447 | } | |
448 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
449 | ||
450 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
451 | bg_blkno, num_bits, alloc_rec, cl); | |
452 | if (status < 0) { | |
453 | brelse(bg_bh); | |
454 | mlog_errno(status); | |
455 | } | |
456 | ||
457 | bail: | |
458 | return status ? ERR_PTR(status) : bg_bh; | |
459 | } | |
460 | ||
461 | static int ocfs2_block_group_claim_bits(struct ocfs2_super *osb, | |
462 | handle_t *handle, | |
463 | struct ocfs2_alloc_context *ac, | |
464 | unsigned int min_bits, | |
465 | u32 *bit_off, u32 *num_bits) | |
466 | { | |
18d3a98f | 467 | int status = 0; |
798db35f JB |
468 | |
469 | while (min_bits) { | |
1ed9b777 | 470 | status = ocfs2_claim_clusters(handle, ac, min_bits, |
798db35f JB |
471 | bit_off, num_bits); |
472 | if (status != -ENOSPC) | |
473 | break; | |
474 | ||
475 | min_bits >>= 1; | |
476 | } | |
477 | ||
478 | return status; | |
479 | } | |
480 | ||
481 | static int ocfs2_block_group_grow_discontig(handle_t *handle, | |
482 | struct inode *alloc_inode, | |
483 | struct buffer_head *bg_bh, | |
484 | struct ocfs2_alloc_context *ac, | |
485 | struct ocfs2_chain_list *cl, | |
486 | unsigned int min_bits) | |
487 | { | |
488 | int status; | |
489 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
490 | struct ocfs2_group_desc *bg = | |
491 | (struct ocfs2_group_desc *)bg_bh->b_data; | |
4711954e TM |
492 | unsigned int needed = le16_to_cpu(cl->cl_cpg) - |
493 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
494 | u32 p_cpos, clusters; |
495 | u64 p_blkno; | |
496 | struct ocfs2_extent_list *el = &bg->bg_list; | |
497 | ||
498 | status = ocfs2_journal_access_gd(handle, | |
499 | INODE_CACHE(alloc_inode), | |
500 | bg_bh, | |
501 | OCFS2_JOURNAL_ACCESS_CREATE); | |
502 | if (status < 0) { | |
503 | mlog_errno(status); | |
504 | goto bail; | |
505 | } | |
506 | ||
507 | while ((needed > 0) && (le16_to_cpu(el->l_next_free_rec) < | |
508 | le16_to_cpu(el->l_count))) { | |
798db35f JB |
509 | if (min_bits > needed) |
510 | min_bits = needed; | |
511 | status = ocfs2_block_group_claim_bits(osb, handle, ac, | |
512 | min_bits, &p_cpos, | |
513 | &clusters); | |
514 | if (status < 0) { | |
515 | if (status != -ENOSPC) | |
516 | mlog_errno(status); | |
517 | goto bail; | |
518 | } | |
519 | p_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cpos); | |
520 | ocfs2_bg_discontig_add_extent(osb, bg, cl, p_blkno, | |
521 | clusters); | |
522 | ||
523 | min_bits = clusters; | |
4711954e TM |
524 | needed = le16_to_cpu(cl->cl_cpg) - |
525 | le16_to_cpu(bg->bg_bits) / le16_to_cpu(cl->cl_bpc); | |
798db35f JB |
526 | } |
527 | ||
528 | if (needed > 0) { | |
4711954e TM |
529 | /* |
530 | * We have used up all the extent rec but can't fill up | |
531 | * the cpg. So bail out. | |
532 | */ | |
533 | status = -ENOSPC; | |
534 | goto bail; | |
798db35f JB |
535 | } |
536 | ||
537 | ocfs2_journal_dirty(handle, bg_bh); | |
538 | ||
539 | bail: | |
540 | return status; | |
541 | } | |
542 | ||
8b06bc59 JB |
543 | static void ocfs2_bg_alloc_cleanup(handle_t *handle, |
544 | struct ocfs2_alloc_context *cluster_ac, | |
545 | struct inode *alloc_inode, | |
546 | struct buffer_head *bg_bh) | |
798db35f | 547 | { |
8b06bc59 | 548 | int i, ret; |
798db35f JB |
549 | struct ocfs2_group_desc *bg; |
550 | struct ocfs2_extent_list *el; | |
551 | struct ocfs2_extent_rec *rec; | |
552 | ||
553 | if (!bg_bh) | |
554 | return; | |
555 | ||
556 | bg = (struct ocfs2_group_desc *)bg_bh->b_data; | |
557 | el = &bg->bg_list; | |
558 | for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { | |
559 | rec = &el->l_recs[i]; | |
8b06bc59 JB |
560 | ret = ocfs2_free_clusters(handle, cluster_ac->ac_inode, |
561 | cluster_ac->ac_bh, | |
562 | le64_to_cpu(rec->e_blkno), | |
72094e43 | 563 | le16_to_cpu(rec->e_leaf_clusters)); |
8b06bc59 JB |
564 | if (ret) |
565 | mlog_errno(ret); | |
566 | /* Try all the clusters to free */ | |
798db35f JB |
567 | } |
568 | ||
569 | ocfs2_remove_from_cache(INODE_CACHE(alloc_inode), bg_bh); | |
570 | brelse(bg_bh); | |
571 | } | |
572 | ||
573 | static struct buffer_head * | |
574 | ocfs2_block_group_alloc_discontig(handle_t *handle, | |
575 | struct inode *alloc_inode, | |
576 | struct ocfs2_alloc_context *ac, | |
8b06bc59 | 577 | struct ocfs2_chain_list *cl) |
798db35f JB |
578 | { |
579 | int status; | |
580 | u32 bit_off, num_bits; | |
581 | u64 bg_blkno; | |
582 | unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1; | |
583 | struct buffer_head *bg_bh = NULL; | |
584 | unsigned int alloc_rec = ocfs2_find_smallest_chain(cl); | |
585 | struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb); | |
586 | ||
4711954e | 587 | if (!ocfs2_supports_discontig_bg(osb)) { |
798db35f JB |
588 | status = -ENOSPC; |
589 | goto bail; | |
590 | } | |
591 | ||
8b06bc59 JB |
592 | status = ocfs2_extend_trans(handle, |
593 | ocfs2_calc_bg_discontig_credits(osb->sb)); | |
594 | if (status) { | |
595 | mlog_errno(status); | |
596 | goto bail; | |
597 | } | |
598 | ||
95ec0adf JB |
599 | /* |
600 | * We're going to be grabbing from multiple cluster groups. | |
601 | * We don't have enough credits to relink them all, and the | |
602 | * cluster groups will be staying in cache for the duration of | |
603 | * this operation. | |
604 | */ | |
309a85b6 | 605 | ac->ac_disable_chain_relink = 1; |
95ec0adf | 606 | |
798db35f JB |
607 | /* Claim the first region */ |
608 | status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits, | |
609 | &bit_off, &num_bits); | |
610 | if (status < 0) { | |
611 | if (status != -ENOSPC) | |
612 | mlog_errno(status); | |
613 | goto bail; | |
614 | } | |
615 | min_bits = num_bits; | |
616 | ||
617 | /* setup the group */ | |
618 | bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
2f73e135 TM |
619 | trace_ocfs2_block_group_alloc_discontig( |
620 | (unsigned long long)bg_blkno, alloc_rec); | |
798db35f JB |
621 | |
622 | bg_bh = sb_getblk(osb->sb, bg_blkno); | |
623 | if (!bg_bh) { | |
7391a294 | 624 | status = -ENOMEM; |
798db35f JB |
625 | mlog_errno(status); |
626 | goto bail; | |
627 | } | |
628 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh); | |
629 | ||
630 | status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh, | |
631 | bg_blkno, num_bits, alloc_rec, cl); | |
632 | if (status < 0) { | |
633 | mlog_errno(status); | |
634 | goto bail; | |
635 | } | |
636 | ||
637 | status = ocfs2_block_group_grow_discontig(handle, alloc_inode, | |
638 | bg_bh, ac, cl, min_bits); | |
639 | if (status) | |
640 | mlog_errno(status); | |
641 | ||
642 | bail: | |
643 | if (status) | |
8b06bc59 | 644 | ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh); |
798db35f JB |
645 | return status ? ERR_PTR(status) : bg_bh; |
646 | } | |
647 | ||
ccd979bd MF |
648 | /* |
649 | * We expect the block group allocator to already be locked. | |
650 | */ | |
651 | static int ocfs2_block_group_alloc(struct ocfs2_super *osb, | |
652 | struct inode *alloc_inode, | |
1187c968 | 653 | struct buffer_head *bh, |
60ca81e8 | 654 | u64 max_block, |
feb473a6 | 655 | u64 *last_alloc_group, |
60ca81e8 | 656 | int flags) |
ccd979bd MF |
657 | { |
658 | int status, credits; | |
659 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data; | |
660 | struct ocfs2_chain_list *cl; | |
661 | struct ocfs2_alloc_context *ac = NULL; | |
1fabe148 | 662 | handle_t *handle = NULL; |
4711954e | 663 | u16 alloc_rec; |
ccd979bd MF |
664 | struct buffer_head *bg_bh = NULL; |
665 | struct ocfs2_group_desc *bg; | |
666 | ||
667 | BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); | |
668 | ||
ccd979bd | 669 | cl = &fe->id2.i_chain; |
1187c968 JB |
670 | status = ocfs2_reserve_clusters_with_limit(osb, |
671 | le16_to_cpu(cl->cl_cpg), | |
60ca81e8 | 672 | max_block, flags, &ac); |
ccd979bd MF |
673 | if (status < 0) { |
674 | if (status != -ENOSPC) | |
675 | mlog_errno(status); | |
676 | goto bail; | |
677 | } | |
678 | ||
679 | credits = ocfs2_calc_group_alloc_credits(osb->sb, | |
680 | le16_to_cpu(cl->cl_cpg)); | |
65eff9cc | 681 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
682 | if (IS_ERR(handle)) { |
683 | status = PTR_ERR(handle); | |
684 | handle = NULL; | |
685 | mlog_errno(status); | |
686 | goto bail; | |
687 | } | |
688 | ||
feb473a6 | 689 | if (last_alloc_group && *last_alloc_group != 0) { |
2f73e135 TM |
690 | trace_ocfs2_block_group_alloc( |
691 | (unsigned long long)*last_alloc_group); | |
feb473a6 TM |
692 | ac->ac_last_group = *last_alloc_group; |
693 | } | |
798db35f JB |
694 | |
695 | bg_bh = ocfs2_block_group_alloc_contig(osb, handle, alloc_inode, | |
696 | ac, cl); | |
45586c70 | 697 | if (PTR_ERR(bg_bh) == -ENOSPC) |
798db35f JB |
698 | bg_bh = ocfs2_block_group_alloc_discontig(handle, |
699 | alloc_inode, | |
8b06bc59 | 700 | ac, cl); |
798db35f JB |
701 | if (IS_ERR(bg_bh)) { |
702 | status = PTR_ERR(bg_bh); | |
703 | bg_bh = NULL; | |
ccd979bd MF |
704 | if (status != -ENOSPC) |
705 | mlog_errno(status); | |
706 | goto bail; | |
707 | } | |
ccd979bd MF |
708 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; |
709 | ||
0cf2f763 | 710 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
13723d00 | 711 | bh, OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
712 | if (status < 0) { |
713 | mlog_errno(status); | |
714 | goto bail; | |
715 | } | |
716 | ||
4711954e TM |
717 | alloc_rec = le16_to_cpu(bg->bg_chain); |
718 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_free, | |
ccd979bd | 719 | le16_to_cpu(bg->bg_free_bits_count)); |
4711954e | 720 | le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, |
798db35f | 721 | le16_to_cpu(bg->bg_bits)); |
0a463b74 | 722 | cl->cl_recs[alloc_rec].c_blkno = bg->bg_blkno; |
ccd979bd MF |
723 | if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count)) |
724 | le16_add_cpu(&cl->cl_next_free_rec, 1); | |
725 | ||
726 | le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) - | |
727 | le16_to_cpu(bg->bg_free_bits_count)); | |
728 | le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits)); | |
729 | le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg)); | |
730 | ||
ec20cec7 | 731 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
732 | |
733 | spin_lock(&OCFS2_I(alloc_inode)->ip_lock); | |
734 | OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
735 | fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb, | |
736 | le32_to_cpu(fe->i_clusters))); | |
737 | spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); | |
738 | i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); | |
8110b073 | 739 | alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); |
6fdb702d | 740 | ocfs2_update_inode_fsync_trans(handle, alloc_inode, 0); |
ccd979bd MF |
741 | |
742 | status = 0; | |
feb473a6 TM |
743 | |
744 | /* save the new last alloc group so that the caller can cache it. */ | |
745 | if (last_alloc_group) | |
746 | *last_alloc_group = ac->ac_last_group; | |
747 | ||
ccd979bd MF |
748 | bail: |
749 | if (handle) | |
02dc1af4 | 750 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
751 | |
752 | if (ac) | |
753 | ocfs2_free_alloc_context(ac); | |
754 | ||
a81cb88b | 755 | brelse(bg_bh); |
ccd979bd | 756 | |
c1e8d35e TM |
757 | if (status) |
758 | mlog_errno(status); | |
ccd979bd MF |
759 | return status; |
760 | } | |
761 | ||
762 | static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb, | |
da5cbf2f MF |
763 | struct ocfs2_alloc_context *ac, |
764 | int type, | |
ffda89a3 | 765 | u32 slot, |
feb473a6 | 766 | u64 *last_alloc_group, |
60ca81e8 | 767 | int flags) |
ccd979bd MF |
768 | { |
769 | int status; | |
770 | u32 bits_wanted = ac->ac_bits_wanted; | |
da5cbf2f | 771 | struct inode *alloc_inode; |
ccd979bd | 772 | struct buffer_head *bh = NULL; |
ccd979bd MF |
773 | struct ocfs2_dinode *fe; |
774 | u32 free_bits; | |
775 | ||
da5cbf2f MF |
776 | alloc_inode = ocfs2_get_system_file_inode(osb, type, slot); |
777 | if (!alloc_inode) { | |
778 | mlog_errno(-EINVAL); | |
779 | return -EINVAL; | |
780 | } | |
ccd979bd | 781 | |
5955102c | 782 | inode_lock(alloc_inode); |
da5cbf2f | 783 | |
e63aecb6 | 784 | status = ocfs2_inode_lock(alloc_inode, &bh, 1); |
ccd979bd | 785 | if (status < 0) { |
5955102c | 786 | inode_unlock(alloc_inode); |
da5cbf2f MF |
787 | iput(alloc_inode); |
788 | ||
ccd979bd | 789 | mlog_errno(status); |
da5cbf2f | 790 | return status; |
ccd979bd MF |
791 | } |
792 | ||
da5cbf2f | 793 | ac->ac_inode = alloc_inode; |
a4a48911 | 794 | ac->ac_alloc_slot = slot; |
da5cbf2f | 795 | |
ccd979bd | 796 | fe = (struct ocfs2_dinode *) bh->b_data; |
10995aa2 JB |
797 | |
798 | /* The bh was validated by the inode read inside | |
799 | * ocfs2_inode_lock(). Any corruption is a code bug. */ | |
800 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
801 | ||
ccd979bd | 802 | if (!(fe->i_flags & cpu_to_le32(OCFS2_CHAIN_FL))) { |
7ecef14a JP |
803 | status = ocfs2_error(alloc_inode->i_sb, |
804 | "Invalid chain allocator %llu\n", | |
805 | (unsigned long long)le64_to_cpu(fe->i_blkno)); | |
ccd979bd MF |
806 | goto bail; |
807 | } | |
808 | ||
809 | free_bits = le32_to_cpu(fe->id1.bitmap1.i_total) - | |
810 | le32_to_cpu(fe->id1.bitmap1.i_used); | |
811 | ||
812 | if (bits_wanted > free_bits) { | |
813 | /* cluster bitmap never grows */ | |
814 | if (ocfs2_is_cluster_bitmap(alloc_inode)) { | |
2f73e135 TM |
815 | trace_ocfs2_reserve_suballoc_bits_nospc(bits_wanted, |
816 | free_bits); | |
ccd979bd MF |
817 | status = -ENOSPC; |
818 | goto bail; | |
819 | } | |
820 | ||
60ca81e8 | 821 | if (!(flags & ALLOC_NEW_GROUP)) { |
2f73e135 TM |
822 | trace_ocfs2_reserve_suballoc_bits_no_new_group( |
823 | slot, bits_wanted, free_bits); | |
ffda89a3 TM |
824 | status = -ENOSPC; |
825 | goto bail; | |
826 | } | |
827 | ||
1187c968 | 828 | status = ocfs2_block_group_alloc(osb, alloc_inode, bh, |
feb473a6 TM |
829 | ac->ac_max_block, |
830 | last_alloc_group, flags); | |
ccd979bd MF |
831 | if (status < 0) { |
832 | if (status != -ENOSPC) | |
833 | mlog_errno(status); | |
834 | goto bail; | |
835 | } | |
836 | atomic_inc(&osb->alloc_stats.bg_extends); | |
837 | ||
838 | /* You should never ask for this much metadata */ | |
839 | BUG_ON(bits_wanted > | |
840 | (le32_to_cpu(fe->id1.bitmap1.i_total) | |
841 | - le32_to_cpu(fe->id1.bitmap1.i_used))); | |
842 | } | |
843 | ||
844 | get_bh(bh); | |
845 | ac->ac_bh = bh; | |
846 | bail: | |
a81cb88b | 847 | brelse(bh); |
ccd979bd | 848 | |
c1e8d35e TM |
849 | if (status) |
850 | mlog_errno(status); | |
ccd979bd MF |
851 | return status; |
852 | } | |
853 | ||
b89c5428 TY |
854 | static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
855 | { | |
856 | spin_lock(&osb->osb_lock); | |
857 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
858 | spin_unlock(&osb->osb_lock); | |
859 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
860 | } | |
861 | ||
862 | static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb) | |
863 | { | |
864 | spin_lock(&osb->osb_lock); | |
865 | osb->s_meta_steal_slot = OCFS2_INVALID_SLOT; | |
866 | spin_unlock(&osb->osb_lock); | |
867 | atomic_set(&osb->s_num_meta_stolen, 0); | |
868 | } | |
869 | ||
870 | void ocfs2_init_steal_slots(struct ocfs2_super *osb) | |
871 | { | |
872 | ocfs2_init_inode_steal_slot(osb); | |
873 | ocfs2_init_meta_steal_slot(osb); | |
874 | } | |
875 | ||
876 | static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type) | |
877 | { | |
878 | spin_lock(&osb->osb_lock); | |
879 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
38d51b2d | 880 | osb->s_inode_steal_slot = (u16)slot; |
b89c5428 | 881 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) |
38d51b2d | 882 | osb->s_meta_steal_slot = (u16)slot; |
b89c5428 TY |
883 | spin_unlock(&osb->osb_lock); |
884 | } | |
885 | ||
886 | static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type) | |
887 | { | |
888 | int slot = OCFS2_INVALID_SLOT; | |
889 | ||
890 | spin_lock(&osb->osb_lock); | |
891 | if (type == INODE_ALLOC_SYSTEM_INODE) | |
892 | slot = osb->s_inode_steal_slot; | |
893 | else if (type == EXTENT_ALLOC_SYSTEM_INODE) | |
894 | slot = osb->s_meta_steal_slot; | |
895 | spin_unlock(&osb->osb_lock); | |
896 | ||
897 | return slot; | |
898 | } | |
899 | ||
900 | static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
901 | { | |
902 | return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE); | |
903 | } | |
904 | ||
905 | static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb) | |
906 | { | |
907 | return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE); | |
908 | } | |
909 | ||
910 | static int ocfs2_steal_resource(struct ocfs2_super *osb, | |
911 | struct ocfs2_alloc_context *ac, | |
912 | int type) | |
913 | { | |
914 | int i, status = -ENOSPC; | |
915 | int slot = __ocfs2_get_steal_slot(osb, type); | |
916 | ||
917 | /* Start to steal resource from the first slot after ours. */ | |
918 | if (slot == OCFS2_INVALID_SLOT) | |
919 | slot = osb->slot_num + 1; | |
920 | ||
921 | for (i = 0; i < osb->max_slots; i++, slot++) { | |
922 | if (slot == osb->max_slots) | |
923 | slot = 0; | |
924 | ||
925 | if (slot == osb->slot_num) | |
926 | continue; | |
927 | ||
928 | status = ocfs2_reserve_suballoc_bits(osb, ac, | |
929 | type, | |
930 | (u32)slot, NULL, | |
931 | NOT_ALLOC_NEW_GROUP); | |
932 | if (status >= 0) { | |
933 | __ocfs2_set_steal_slot(osb, slot, type); | |
934 | break; | |
935 | } | |
936 | ||
937 | ocfs2_free_ac_resource(ac); | |
938 | } | |
939 | ||
940 | return status; | |
941 | } | |
942 | ||
943 | static int ocfs2_steal_inode(struct ocfs2_super *osb, | |
944 | struct ocfs2_alloc_context *ac) | |
945 | { | |
946 | return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE); | |
947 | } | |
948 | ||
949 | static int ocfs2_steal_meta(struct ocfs2_super *osb, | |
950 | struct ocfs2_alloc_context *ac) | |
951 | { | |
952 | return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE); | |
953 | } | |
954 | ||
cf1d6c76 TY |
955 | int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, |
956 | int blocks, | |
957 | struct ocfs2_alloc_context **ac) | |
ccd979bd MF |
958 | { |
959 | int status; | |
b89c5428 | 960 | int slot = ocfs2_get_meta_steal_slot(osb); |
ccd979bd | 961 | |
cd861280 | 962 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
963 | if (!(*ac)) { |
964 | status = -ENOMEM; | |
965 | mlog_errno(status); | |
966 | goto bail; | |
967 | } | |
968 | ||
cf1d6c76 | 969 | (*ac)->ac_bits_wanted = blocks; |
ccd979bd | 970 | (*ac)->ac_which = OCFS2_AC_USE_META; |
ccd979bd MF |
971 | (*ac)->ac_group_search = ocfs2_block_group_search; |
972 | ||
b89c5428 TY |
973 | if (slot != OCFS2_INVALID_SLOT && |
974 | atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL) | |
975 | goto extent_steal; | |
976 | ||
977 | atomic_set(&osb->s_num_meta_stolen, 0); | |
da5cbf2f | 978 | status = ocfs2_reserve_suballoc_bits(osb, (*ac), |
ffda89a3 | 979 | EXTENT_ALLOC_SYSTEM_INODE, |
b89c5428 | 980 | (u32)osb->slot_num, NULL, |
33d5d380 | 981 | ALLOC_GROUPS_FROM_GLOBAL|ALLOC_NEW_GROUP); |
b89c5428 TY |
982 | |
983 | ||
984 | if (status >= 0) { | |
985 | status = 0; | |
986 | if (slot != OCFS2_INVALID_SLOT) | |
987 | ocfs2_init_meta_steal_slot(osb); | |
988 | goto bail; | |
989 | } else if (status < 0 && status != -ENOSPC) { | |
990 | mlog_errno(status); | |
991 | goto bail; | |
992 | } | |
993 | ||
994 | ocfs2_free_ac_resource(*ac); | |
995 | ||
996 | extent_steal: | |
997 | status = ocfs2_steal_meta(osb, *ac); | |
998 | atomic_inc(&osb->s_num_meta_stolen); | |
ccd979bd MF |
999 | if (status < 0) { |
1000 | if (status != -ENOSPC) | |
1001 | mlog_errno(status); | |
1002 | goto bail; | |
1003 | } | |
1004 | ||
1005 | status = 0; | |
1006 | bail: | |
1007 | if ((status < 0) && *ac) { | |
1008 | ocfs2_free_alloc_context(*ac); | |
1009 | *ac = NULL; | |
1010 | } | |
1011 | ||
c1e8d35e TM |
1012 | if (status) |
1013 | mlog_errno(status); | |
ccd979bd MF |
1014 | return status; |
1015 | } | |
1016 | ||
cf1d6c76 TY |
1017 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, |
1018 | struct ocfs2_extent_list *root_el, | |
1019 | struct ocfs2_alloc_context **ac) | |
1020 | { | |
1021 | return ocfs2_reserve_new_metadata_blocks(osb, | |
1022 | ocfs2_extend_meta_needed(root_el), | |
1023 | ac); | |
1024 | } | |
1025 | ||
ccd979bd | 1026 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, |
ccd979bd MF |
1027 | struct ocfs2_alloc_context **ac) |
1028 | { | |
1029 | int status; | |
b89c5428 | 1030 | int slot = ocfs2_get_inode_steal_slot(osb); |
feb473a6 | 1031 | u64 alloc_group; |
ccd979bd | 1032 | |
cd861280 | 1033 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1034 | if (!(*ac)) { |
1035 | status = -ENOMEM; | |
1036 | mlog_errno(status); | |
1037 | goto bail; | |
1038 | } | |
1039 | ||
1040 | (*ac)->ac_bits_wanted = 1; | |
ccd979bd MF |
1041 | (*ac)->ac_which = OCFS2_AC_USE_INODE; |
1042 | ||
ccd979bd MF |
1043 | (*ac)->ac_group_search = ocfs2_block_group_search; |
1044 | ||
1187c968 JB |
1045 | /* |
1046 | * stat(2) can't handle i_ino > 32bits, so we tell the | |
1047 | * lower levels not to allocate us a block group past that | |
12462f1d | 1048 | * limit. The 'inode64' mount option avoids this behavior. |
1187c968 | 1049 | */ |
12462f1d JB |
1050 | if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64)) |
1051 | (*ac)->ac_max_block = (u32)~0U; | |
1187c968 | 1052 | |
4d0ddb2c TM |
1053 | /* |
1054 | * slot is set when we successfully steal inode from other nodes. | |
1055 | * It is reset in 3 places: | |
1056 | * 1. when we flush the truncate log | |
1057 | * 2. when we complete local alloc recovery. | |
1058 | * 3. when we successfully allocate from our own slot. | |
1059 | * After it is set, we will go on stealing inodes until we find the | |
1060 | * need to check our slots to see whether there is some space for us. | |
1061 | */ | |
1062 | if (slot != OCFS2_INVALID_SLOT && | |
b89c5428 | 1063 | atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL) |
4d0ddb2c TM |
1064 | goto inode_steal; |
1065 | ||
1066 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
feb473a6 | 1067 | alloc_group = osb->osb_inode_alloc_group; |
da5cbf2f MF |
1068 | status = ocfs2_reserve_suballoc_bits(osb, *ac, |
1069 | INODE_ALLOC_SYSTEM_INODE, | |
b89c5428 | 1070 | (u32)osb->slot_num, |
feb473a6 | 1071 | &alloc_group, |
60ca81e8 TM |
1072 | ALLOC_NEW_GROUP | |
1073 | ALLOC_GROUPS_FROM_GLOBAL); | |
4d0ddb2c TM |
1074 | if (status >= 0) { |
1075 | status = 0; | |
1076 | ||
feb473a6 TM |
1077 | spin_lock(&osb->osb_lock); |
1078 | osb->osb_inode_alloc_group = alloc_group; | |
1079 | spin_unlock(&osb->osb_lock); | |
2f73e135 TM |
1080 | trace_ocfs2_reserve_new_inode_new_group( |
1081 | (unsigned long long)alloc_group); | |
feb473a6 | 1082 | |
4d0ddb2c TM |
1083 | /* |
1084 | * Some inodes must be freed by us, so try to allocate | |
1085 | * from our own next time. | |
1086 | */ | |
1087 | if (slot != OCFS2_INVALID_SLOT) | |
1088 | ocfs2_init_inode_steal_slot(osb); | |
1089 | goto bail; | |
1090 | } else if (status < 0 && status != -ENOSPC) { | |
1091 | mlog_errno(status); | |
1092 | goto bail; | |
1093 | } | |
1094 | ||
1095 | ocfs2_free_ac_resource(*ac); | |
1096 | ||
1097 | inode_steal: | |
b89c5428 | 1098 | status = ocfs2_steal_inode(osb, *ac); |
4d0ddb2c | 1099 | atomic_inc(&osb->s_num_inodes_stolen); |
ccd979bd MF |
1100 | if (status < 0) { |
1101 | if (status != -ENOSPC) | |
1102 | mlog_errno(status); | |
1103 | goto bail; | |
1104 | } | |
1105 | ||
1106 | status = 0; | |
1107 | bail: | |
1108 | if ((status < 0) && *ac) { | |
1109 | ocfs2_free_alloc_context(*ac); | |
1110 | *ac = NULL; | |
1111 | } | |
1112 | ||
c1e8d35e TM |
1113 | if (status) |
1114 | mlog_errno(status); | |
ccd979bd MF |
1115 | return status; |
1116 | } | |
1117 | ||
1118 | /* local alloc code has to do the same thing, so rather than do this | |
1119 | * twice.. */ | |
1120 | int ocfs2_reserve_cluster_bitmap_bits(struct ocfs2_super *osb, | |
1121 | struct ocfs2_alloc_context *ac) | |
1122 | { | |
1123 | int status; | |
1124 | ||
ccd979bd MF |
1125 | ac->ac_which = OCFS2_AC_USE_MAIN; |
1126 | ac->ac_group_search = ocfs2_cluster_group_search; | |
1127 | ||
da5cbf2f MF |
1128 | status = ocfs2_reserve_suballoc_bits(osb, ac, |
1129 | GLOBAL_BITMAP_SYSTEM_INODE, | |
feb473a6 | 1130 | OCFS2_INVALID_SLOT, NULL, |
ffda89a3 | 1131 | ALLOC_NEW_GROUP); |
47ee9d89 | 1132 | if (status < 0 && status != -ENOSPC) |
ccd979bd | 1133 | mlog_errno(status); |
da5cbf2f | 1134 | |
ccd979bd MF |
1135 | return status; |
1136 | } | |
1137 | ||
1138 | /* Callers don't need to care which bitmap (local alloc or main) to | |
1139 | * use so we figure it out for them, but unfortunately this clutters | |
1140 | * things a bit. */ | |
1187c968 JB |
1141 | static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb, |
1142 | u32 bits_wanted, u64 max_block, | |
60ca81e8 | 1143 | int flags, |
1187c968 | 1144 | struct ocfs2_alloc_context **ac) |
ccd979bd | 1145 | { |
2070ad1a ER |
1146 | int status, ret = 0; |
1147 | int retried = 0; | |
ccd979bd | 1148 | |
cd861280 | 1149 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1150 | if (!(*ac)) { |
1151 | status = -ENOMEM; | |
1152 | mlog_errno(status); | |
1153 | goto bail; | |
1154 | } | |
1155 | ||
1156 | (*ac)->ac_bits_wanted = bits_wanted; | |
1187c968 | 1157 | (*ac)->ac_max_block = max_block; |
ccd979bd MF |
1158 | |
1159 | status = -ENOSPC; | |
60ca81e8 TM |
1160 | if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) && |
1161 | ocfs2_alloc_should_use_local(osb, bits_wanted)) { | |
ccd979bd | 1162 | status = ocfs2_reserve_local_alloc_bits(osb, |
ccd979bd MF |
1163 | bits_wanted, |
1164 | *ac); | |
a57c8fd2 | 1165 | if ((status < 0) && (status != -ENOSPC)) { |
ccd979bd MF |
1166 | mlog_errno(status); |
1167 | goto bail; | |
ccd979bd MF |
1168 | } |
1169 | } | |
1170 | ||
1171 | if (status == -ENOSPC) { | |
2070ad1a | 1172 | retry: |
ccd979bd | 1173 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); |
2070ad1a ER |
1174 | /* Retry if there is sufficient space cached in truncate log */ |
1175 | if (status == -ENOSPC && !retried) { | |
1176 | retried = 1; | |
1177 | ocfs2_inode_unlock((*ac)->ac_inode, 1); | |
1178 | inode_unlock((*ac)->ac_inode); | |
1179 | ||
1180 | ret = ocfs2_try_to_free_truncate_log(osb, bits_wanted); | |
3bb8b653 JQ |
1181 | if (ret == 1) { |
1182 | iput((*ac)->ac_inode); | |
1183 | (*ac)->ac_inode = NULL; | |
2070ad1a | 1184 | goto retry; |
3bb8b653 | 1185 | } |
2070ad1a ER |
1186 | |
1187 | if (ret < 0) | |
1188 | mlog_errno(ret); | |
1189 | ||
1190 | inode_lock((*ac)->ac_inode); | |
3bb8b653 JQ |
1191 | ret = ocfs2_inode_lock((*ac)->ac_inode, NULL, 1); |
1192 | if (ret < 0) { | |
1193 | mlog_errno(ret); | |
1194 | inode_unlock((*ac)->ac_inode); | |
1195 | iput((*ac)->ac_inode); | |
1196 | (*ac)->ac_inode = NULL; | |
1197 | goto bail; | |
1198 | } | |
2070ad1a | 1199 | } |
ccd979bd MF |
1200 | if (status < 0) { |
1201 | if (status != -ENOSPC) | |
1202 | mlog_errno(status); | |
1203 | goto bail; | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | status = 0; | |
1208 | bail: | |
1209 | if ((status < 0) && *ac) { | |
1210 | ocfs2_free_alloc_context(*ac); | |
1211 | *ac = NULL; | |
1212 | } | |
1213 | ||
c1e8d35e TM |
1214 | if (status) |
1215 | mlog_errno(status); | |
ccd979bd MF |
1216 | return status; |
1217 | } | |
1218 | ||
1187c968 JB |
1219 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, |
1220 | u32 bits_wanted, | |
1221 | struct ocfs2_alloc_context **ac) | |
1222 | { | |
60ca81e8 TM |
1223 | return ocfs2_reserve_clusters_with_limit(osb, bits_wanted, 0, |
1224 | ALLOC_NEW_GROUP, ac); | |
1187c968 JB |
1225 | } |
1226 | ||
ccd979bd MF |
1227 | /* |
1228 | * More or less lifted from ext3. I'll leave their description below: | |
1229 | * | |
1230 | * "For ext3 allocations, we must not reuse any blocks which are | |
1231 | * allocated in the bitmap buffer's "last committed data" copy. This | |
1232 | * prevents deletes from freeing up the page for reuse until we have | |
1233 | * committed the delete transaction. | |
1234 | * | |
1235 | * If we didn't do this, then deleting something and reallocating it as | |
1236 | * data would allow the old block to be overwritten before the | |
1237 | * transaction committed (because we force data to disk before commit). | |
1238 | * This would lead to corruption if we crashed between overwriting the | |
1239 | * data and committing the delete. | |
1240 | * | |
1241 | * @@@ We may want to make this allocation behaviour conditional on | |
1242 | * data-writes at some point, and disable it for metadata allocations or | |
1243 | * sync-data inodes." | |
1244 | * | |
1245 | * Note: OCFS2 already does this differently for metadata vs data | |
c78bad11 | 1246 | * allocations, as those bitmaps are separate and undo access is never |
ccd979bd MF |
1247 | * called on a metadata group descriptor. |
1248 | */ | |
1249 | static int ocfs2_test_bg_bit_allocatable(struct buffer_head *bg_bh, | |
1250 | int nr) | |
1251 | { | |
1252 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
46417064 | 1253 | struct journal_head *jh; |
ddf4b773 | 1254 | int ret; |
ccd979bd MF |
1255 | |
1256 | if (ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap)) | |
1257 | return 0; | |
94e41ecf | 1258 | |
ddf4b773 JQ |
1259 | jh = jbd2_journal_grab_journal_head(bg_bh); |
1260 | if (!jh) | |
ccd979bd MF |
1261 | return 1; |
1262 | ||
ddf4b773 JQ |
1263 | spin_lock(&jh->b_state_lock); |
1264 | bg = (struct ocfs2_group_desc *) jh->b_committed_data; | |
1265 | if (bg) | |
1266 | ret = !ocfs2_test_bit(nr, (unsigned long *)bg->bg_bitmap); | |
1267 | else | |
1268 | ret = 1; | |
1269 | spin_unlock(&jh->b_state_lock); | |
1270 | jbd2_journal_put_journal_head(jh); | |
94e41ecf SM |
1271 | |
1272 | return ret; | |
ccd979bd MF |
1273 | } |
1274 | ||
1275 | static int ocfs2_block_group_find_clear_bits(struct ocfs2_super *osb, | |
1276 | struct buffer_head *bg_bh, | |
1277 | unsigned int bits_wanted, | |
7bf72ede | 1278 | unsigned int total_bits, |
7d1fe093 | 1279 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1280 | { |
1281 | void *bitmap; | |
1282 | u16 best_offset, best_size; | |
1283 | int offset, start, found, status = 0; | |
1284 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1285 | ||
42035306 JB |
1286 | /* Callers got this descriptor from |
1287 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1288 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1289 | |
1290 | found = start = best_offset = best_size = 0; | |
1291 | bitmap = bg->bg_bitmap; | |
1292 | ||
7bf72ede MF |
1293 | while((offset = ocfs2_find_next_zero_bit(bitmap, total_bits, start)) != -1) { |
1294 | if (offset == total_bits) | |
ccd979bd MF |
1295 | break; |
1296 | ||
1297 | if (!ocfs2_test_bg_bit_allocatable(bg_bh, offset)) { | |
1298 | /* We found a zero, but we can't use it as it | |
1299 | * hasn't been put to disk yet! */ | |
1300 | found = 0; | |
1301 | start = offset + 1; | |
1302 | } else if (offset == start) { | |
1303 | /* we found a zero */ | |
1304 | found++; | |
1305 | /* move start to the next bit to test */ | |
1306 | start++; | |
1307 | } else { | |
1308 | /* got a zero after some ones */ | |
1309 | found = 1; | |
1310 | start = offset + 1; | |
1311 | } | |
1312 | if (found > best_size) { | |
1313 | best_size = found; | |
1314 | best_offset = start - found; | |
1315 | } | |
1316 | /* we got everything we needed */ | |
1317 | if (found == bits_wanted) { | |
1318 | /* mlog(0, "Found it all!\n"); */ | |
1319 | break; | |
1320 | } | |
1321 | } | |
1322 | ||
7d1fe093 JB |
1323 | if (best_size) { |
1324 | res->sr_bit_offset = best_offset; | |
1325 | res->sr_bits = best_size; | |
ccd979bd MF |
1326 | } else { |
1327 | status = -ENOSPC; | |
1328 | /* No error log here -- see the comment above | |
1329 | * ocfs2_test_bg_bit_allocatable */ | |
1330 | } | |
1331 | ||
1332 | return status; | |
1333 | } | |
1334 | ||
0a2fcd89 | 1335 | int ocfs2_block_group_set_bits(handle_t *handle, |
ccd979bd MF |
1336 | struct inode *alloc_inode, |
1337 | struct ocfs2_group_desc *bg, | |
1338 | struct buffer_head *group_bh, | |
1339 | unsigned int bit_off, | |
1340 | unsigned int num_bits) | |
1341 | { | |
1342 | int status; | |
1343 | void *bitmap = bg->bg_bitmap; | |
1344 | int journal_type = OCFS2_JOURNAL_ACCESS_WRITE; | |
1345 | ||
42035306 JB |
1346 | /* All callers get the descriptor via |
1347 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1348 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd MF |
1349 | BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits); |
1350 | ||
2f73e135 | 1351 | trace_ocfs2_block_group_set_bits(bit_off, num_bits); |
ccd979bd MF |
1352 | |
1353 | if (ocfs2_is_cluster_bitmap(alloc_inode)) | |
1354 | journal_type = OCFS2_JOURNAL_ACCESS_UNDO; | |
1355 | ||
13723d00 | 1356 | status = ocfs2_journal_access_gd(handle, |
0cf2f763 | 1357 | INODE_CACHE(alloc_inode), |
13723d00 JB |
1358 | group_bh, |
1359 | journal_type); | |
ccd979bd MF |
1360 | if (status < 0) { |
1361 | mlog_errno(status); | |
1362 | goto bail; | |
1363 | } | |
1364 | ||
1365 | le16_add_cpu(&bg->bg_free_bits_count, -num_bits); | |
9b5cd10e | 1366 | if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { |
7ecef14a JP |
1367 | return ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit count %u but claims %u are freed. num_bits %d\n", |
1368 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1369 | le16_to_cpu(bg->bg_bits), | |
1370 | le16_to_cpu(bg->bg_free_bits_count), | |
1371 | num_bits); | |
9b5cd10e | 1372 | } |
ccd979bd MF |
1373 | while(num_bits--) |
1374 | ocfs2_set_bit(bit_off++, bitmap); | |
1375 | ||
ec20cec7 | 1376 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
1377 | |
1378 | bail: | |
ccd979bd MF |
1379 | return status; |
1380 | } | |
1381 | ||
1382 | /* find the one with the most empty bits */ | |
1383 | static inline u16 ocfs2_find_victim_chain(struct ocfs2_chain_list *cl) | |
1384 | { | |
1385 | u16 curr, best; | |
1386 | ||
1387 | BUG_ON(!cl->cl_next_free_rec); | |
1388 | ||
1389 | best = curr = 0; | |
1390 | while (curr < le16_to_cpu(cl->cl_next_free_rec)) { | |
1391 | if (le32_to_cpu(cl->cl_recs[curr].c_free) > | |
1392 | le32_to_cpu(cl->cl_recs[best].c_free)) | |
1393 | best = curr; | |
1394 | curr++; | |
1395 | } | |
1396 | ||
1397 | BUG_ON(best >= le16_to_cpu(cl->cl_next_free_rec)); | |
1398 | return best; | |
1399 | } | |
1400 | ||
1fabe148 | 1401 | static int ocfs2_relink_block_group(handle_t *handle, |
ccd979bd MF |
1402 | struct inode *alloc_inode, |
1403 | struct buffer_head *fe_bh, | |
1404 | struct buffer_head *bg_bh, | |
1405 | struct buffer_head *prev_bg_bh, | |
1406 | u16 chain) | |
1407 | { | |
1408 | int status; | |
1409 | /* there is a really tiny chance the journal calls could fail, | |
1410 | * but we wouldn't want inconsistent blocks in *any* case. */ | |
49309841 | 1411 | u64 bg_ptr, prev_bg_ptr; |
ccd979bd MF |
1412 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; |
1413 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
1414 | struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data; | |
1415 | ||
42035306 JB |
1416 | /* The caller got these descriptors from |
1417 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
1418 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
1419 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(prev_bg)); | |
ccd979bd | 1420 | |
2f73e135 TM |
1421 | trace_ocfs2_relink_block_group( |
1422 | (unsigned long long)le64_to_cpu(fe->i_blkno), chain, | |
1423 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
1424 | (unsigned long long)le64_to_cpu(prev_bg->bg_blkno)); | |
ccd979bd | 1425 | |
ccd979bd MF |
1426 | bg_ptr = le64_to_cpu(bg->bg_next_group); |
1427 | prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group); | |
1428 | ||
0cf2f763 JB |
1429 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1430 | prev_bg_bh, | |
13723d00 | 1431 | OCFS2_JOURNAL_ACCESS_WRITE); |
25e28921 | 1432 | if (status < 0) |
49309841 | 1433 | goto out; |
ccd979bd MF |
1434 | |
1435 | prev_bg->bg_next_group = bg->bg_next_group; | |
ec20cec7 | 1436 | ocfs2_journal_dirty(handle, prev_bg_bh); |
ccd979bd | 1437 | |
0cf2f763 JB |
1438 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
1439 | bg_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
25e28921 | 1440 | if (status < 0) |
49309841 | 1441 | goto out_rollback_prev_bg; |
ccd979bd MF |
1442 | |
1443 | bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno; | |
ec20cec7 | 1444 | ocfs2_journal_dirty(handle, bg_bh); |
ccd979bd | 1445 | |
0cf2f763 JB |
1446 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
1447 | fe_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
25e28921 | 1448 | if (status < 0) |
49309841 | 1449 | goto out_rollback_bg; |
ccd979bd MF |
1450 | |
1451 | fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno; | |
ec20cec7 | 1452 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 1453 | |
49309841 | 1454 | out: |
25e28921 AM |
1455 | if (status < 0) |
1456 | mlog_errno(status); | |
49309841 | 1457 | return status; |
42035306 | 1458 | |
49309841 JL |
1459 | out_rollback_bg: |
1460 | bg->bg_next_group = cpu_to_le64(bg_ptr); | |
1461 | out_rollback_prev_bg: | |
1462 | prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr); | |
25e28921 | 1463 | goto out; |
ccd979bd MF |
1464 | } |
1465 | ||
1466 | static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg, | |
1467 | u32 wanted) | |
1468 | { | |
1469 | return le16_to_cpu(bg->bg_free_bits_count) > wanted; | |
1470 | } | |
1471 | ||
1472 | /* return 0 on success, -ENOSPC to keep searching and any other < 0 | |
1473 | * value on error. */ | |
1474 | static int ocfs2_cluster_group_search(struct inode *inode, | |
1475 | struct buffer_head *group_bh, | |
1476 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1477 | u64 max_block, |
7d1fe093 | 1478 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1479 | { |
1480 | int search = -ENOSPC; | |
1481 | int ret; | |
1187c968 | 1482 | u64 blkoff; |
7bf72ede | 1483 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *) group_bh->b_data; |
9c7af40b | 1484 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bf72ede | 1485 | unsigned int max_bits, gd_cluster_off; |
ccd979bd MF |
1486 | |
1487 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
1488 | ||
7bf72ede MF |
1489 | if (gd->bg_free_bits_count) { |
1490 | max_bits = le16_to_cpu(gd->bg_bits); | |
1491 | ||
1492 | /* Tail groups in cluster bitmaps which aren't cpg | |
25985edc | 1493 | * aligned are prone to partial extension by a failed |
7bf72ede MF |
1494 | * fs resize. If the file system resize never got to |
1495 | * update the dinode cluster count, then we don't want | |
1496 | * to trust any clusters past it, regardless of what | |
1497 | * the group descriptor says. */ | |
1498 | gd_cluster_off = ocfs2_blocks_to_clusters(inode->i_sb, | |
1499 | le64_to_cpu(gd->bg_blkno)); | |
1500 | if ((gd_cluster_off + max_bits) > | |
1501 | OCFS2_I(inode)->ip_clusters) { | |
1502 | max_bits = OCFS2_I(inode)->ip_clusters - gd_cluster_off; | |
2f73e135 TM |
1503 | trace_ocfs2_cluster_group_search_wrong_max_bits( |
1504 | (unsigned long long)le64_to_cpu(gd->bg_blkno), | |
1505 | le16_to_cpu(gd->bg_bits), | |
1506 | OCFS2_I(inode)->ip_clusters, max_bits); | |
7bf72ede MF |
1507 | } |
1508 | ||
1119d3c0 | 1509 | ret = ocfs2_block_group_find_clear_bits(osb, |
ccd979bd | 1510 | group_bh, bits_wanted, |
7d1fe093 | 1511 | max_bits, res); |
ccd979bd MF |
1512 | if (ret) |
1513 | return ret; | |
1514 | ||
1187c968 JB |
1515 | if (max_block) { |
1516 | blkoff = ocfs2_clusters_to_blocks(inode->i_sb, | |
1517 | gd_cluster_off + | |
7d1fe093 JB |
1518 | res->sr_bit_offset + |
1519 | res->sr_bits); | |
2f73e135 TM |
1520 | trace_ocfs2_cluster_group_search_max_block( |
1521 | (unsigned long long)blkoff, | |
1522 | (unsigned long long)max_block); | |
1187c968 JB |
1523 | if (blkoff > max_block) |
1524 | return -ENOSPC; | |
1525 | } | |
1526 | ||
ccd979bd MF |
1527 | /* ocfs2_block_group_find_clear_bits() might |
1528 | * return success, but we still want to return | |
1529 | * -ENOSPC unless it found the minimum number | |
1530 | * of bits. */ | |
7d1fe093 | 1531 | if (min_bits <= res->sr_bits) |
ccd979bd | 1532 | search = 0; /* success */ |
7d1fe093 | 1533 | else if (res->sr_bits) { |
9c7af40b MF |
1534 | /* |
1535 | * Don't show bits which we'll be returning | |
1536 | * for allocation to the local alloc bitmap. | |
1537 | */ | |
7d1fe093 | 1538 | ocfs2_local_alloc_seen_free_bits(osb, res->sr_bits); |
ccd979bd MF |
1539 | } |
1540 | } | |
1541 | ||
1542 | return search; | |
1543 | } | |
1544 | ||
1545 | static int ocfs2_block_group_search(struct inode *inode, | |
1546 | struct buffer_head *group_bh, | |
1547 | u32 bits_wanted, u32 min_bits, | |
1187c968 | 1548 | u64 max_block, |
7d1fe093 | 1549 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1550 | { |
1551 | int ret = -ENOSPC; | |
1187c968 | 1552 | u64 blkoff; |
ccd979bd MF |
1553 | struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) group_bh->b_data; |
1554 | ||
1555 | BUG_ON(min_bits != 1); | |
1556 | BUG_ON(ocfs2_is_cluster_bitmap(inode)); | |
1557 | ||
1187c968 | 1558 | if (bg->bg_free_bits_count) { |
ccd979bd MF |
1559 | ret = ocfs2_block_group_find_clear_bits(OCFS2_SB(inode->i_sb), |
1560 | group_bh, bits_wanted, | |
7bf72ede | 1561 | le16_to_cpu(bg->bg_bits), |
7d1fe093 | 1562 | res); |
1187c968 | 1563 | if (!ret && max_block) { |
7d1fe093 JB |
1564 | blkoff = le64_to_cpu(bg->bg_blkno) + |
1565 | res->sr_bit_offset + res->sr_bits; | |
2f73e135 TM |
1566 | trace_ocfs2_block_group_search_max_block( |
1567 | (unsigned long long)blkoff, | |
1568 | (unsigned long long)max_block); | |
1187c968 JB |
1569 | if (blkoff > max_block) |
1570 | ret = -ENOSPC; | |
1571 | } | |
1572 | } | |
ccd979bd MF |
1573 | |
1574 | return ret; | |
1575 | } | |
1576 | ||
0a2fcd89 | 1577 | int ocfs2_alloc_dinode_update_counts(struct inode *inode, |
1fabe148 | 1578 | handle_t *handle, |
883d4cae MF |
1579 | struct buffer_head *di_bh, |
1580 | u32 num_bits, | |
1581 | u16 chain) | |
1582 | { | |
1583 | int ret; | |
1584 | u32 tmp_used; | |
1585 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1586 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &di->id2.i_chain; | |
1587 | ||
0cf2f763 | 1588 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
13723d00 | 1589 | OCFS2_JOURNAL_ACCESS_WRITE); |
883d4cae MF |
1590 | if (ret < 0) { |
1591 | mlog_errno(ret); | |
1592 | goto out; | |
1593 | } | |
1594 | ||
1595 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1596 | di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used); | |
1597 | le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits); | |
ec20cec7 | 1598 | ocfs2_journal_dirty(handle, di_bh); |
883d4cae MF |
1599 | |
1600 | out: | |
1601 | return ret; | |
1602 | } | |
1603 | ||
db66c715 YL |
1604 | void ocfs2_rollback_alloc_dinode_counts(struct inode *inode, |
1605 | struct buffer_head *di_bh, | |
1606 | u32 num_bits, | |
1607 | u16 chain) | |
1608 | { | |
1609 | u32 tmp_used; | |
1610 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; | |
1611 | struct ocfs2_chain_list *cl; | |
1612 | ||
1613 | cl = (struct ocfs2_chain_list *)&di->id2.i_chain; | |
1614 | tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); | |
1615 | di->id1.bitmap1.i_used = cpu_to_le32(tmp_used - num_bits); | |
1616 | le32_add_cpu(&cl->cl_recs[chain].c_free, num_bits); | |
1617 | } | |
1618 | ||
ba206635 JB |
1619 | static int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, |
1620 | struct ocfs2_extent_rec *rec, | |
1621 | struct ocfs2_chain_list *cl) | |
13e434cf JB |
1622 | { |
1623 | unsigned int bpc = le16_to_cpu(cl->cl_bpc); | |
1624 | unsigned int bitoff = le32_to_cpu(rec->e_cpos) * bpc; | |
72094e43 | 1625 | unsigned int bitcount = le16_to_cpu(rec->e_leaf_clusters) * bpc; |
13e434cf JB |
1626 | |
1627 | if (res->sr_bit_offset < bitoff) | |
1628 | return 0; | |
1629 | if (res->sr_bit_offset >= (bitoff + bitcount)) | |
1630 | return 0; | |
ba206635 JB |
1631 | res->sr_blkno = le64_to_cpu(rec->e_blkno) + |
1632 | (res->sr_bit_offset - bitoff); | |
13e434cf JB |
1633 | if ((res->sr_bit_offset + res->sr_bits) > (bitoff + bitcount)) |
1634 | res->sr_bits = (bitoff + bitcount) - res->sr_bit_offset; | |
1635 | return 1; | |
1636 | } | |
1637 | ||
ba206635 JB |
1638 | static void ocfs2_bg_discontig_fix_result(struct ocfs2_alloc_context *ac, |
1639 | struct ocfs2_group_desc *bg, | |
1640 | struct ocfs2_suballoc_result *res) | |
13e434cf JB |
1641 | { |
1642 | int i; | |
2b6cb576 | 1643 | u64 bg_blkno = res->sr_bg_blkno; /* Save off */ |
13e434cf JB |
1644 | struct ocfs2_extent_rec *rec; |
1645 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; | |
1646 | struct ocfs2_chain_list *cl = &di->id2.i_chain; | |
1647 | ||
ba206635 JB |
1648 | if (ocfs2_is_cluster_bitmap(ac->ac_inode)) { |
1649 | res->sr_blkno = 0; | |
13e434cf | 1650 | return; |
ba206635 | 1651 | } |
13e434cf | 1652 | |
ba206635 | 1653 | res->sr_blkno = res->sr_bg_blkno + res->sr_bit_offset; |
2b6cb576 | 1654 | res->sr_bg_blkno = 0; /* Clear it for contig block groups */ |
4711954e | 1655 | if (!ocfs2_supports_discontig_bg(OCFS2_SB(ac->ac_inode->i_sb)) || |
ba206635 | 1656 | !bg->bg_list.l_next_free_rec) |
13e434cf JB |
1657 | return; |
1658 | ||
1659 | for (i = 0; i < le16_to_cpu(bg->bg_list.l_next_free_rec); i++) { | |
1660 | rec = &bg->bg_list.l_recs[i]; | |
2b6cb576 JB |
1661 | if (ocfs2_bg_discontig_fix_by_rec(res, rec, cl)) { |
1662 | res->sr_bg_blkno = bg_blkno; /* Restore */ | |
13e434cf | 1663 | break; |
2b6cb576 | 1664 | } |
13e434cf JB |
1665 | } |
1666 | } | |
1667 | ||
883d4cae | 1668 | static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, |
1fabe148 | 1669 | handle_t *handle, |
883d4cae MF |
1670 | u32 bits_wanted, |
1671 | u32 min_bits, | |
7d1fe093 | 1672 | struct ocfs2_suballoc_result *res, |
883d4cae MF |
1673 | u16 *bits_left) |
1674 | { | |
1675 | int ret; | |
883d4cae MF |
1676 | struct buffer_head *group_bh = NULL; |
1677 | struct ocfs2_group_desc *gd; | |
68f64d47 | 1678 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)ac->ac_bh->b_data; |
883d4cae | 1679 | struct inode *alloc_inode = ac->ac_inode; |
883d4cae | 1680 | |
7d1fe093 JB |
1681 | ret = ocfs2_read_group_descriptor(alloc_inode, di, |
1682 | res->sr_bg_blkno, &group_bh); | |
883d4cae MF |
1683 | if (ret < 0) { |
1684 | mlog_errno(ret); | |
1685 | return ret; | |
1686 | } | |
1687 | ||
1688 | gd = (struct ocfs2_group_desc *) group_bh->b_data; | |
883d4cae | 1689 | ret = ac->ac_group_search(alloc_inode, group_bh, bits_wanted, min_bits, |
7d1fe093 | 1690 | ac->ac_max_block, res); |
883d4cae MF |
1691 | if (ret < 0) { |
1692 | if (ret != -ENOSPC) | |
1693 | mlog_errno(ret); | |
1694 | goto out; | |
1695 | } | |
1696 | ||
13e434cf | 1697 | if (!ret) |
ba206635 | 1698 | ocfs2_bg_discontig_fix_result(ac, gd, res); |
13e434cf | 1699 | |
e49e2767 MF |
1700 | /* |
1701 | * sr_bg_blkno might have been changed by | |
1702 | * ocfs2_bg_discontig_fix_result | |
1703 | */ | |
1704 | res->sr_bg_stable_blkno = group_bh->b_blocknr; | |
1705 | ||
1706 | if (ac->ac_find_loc_only) | |
1707 | goto out_loc_only; | |
1708 | ||
883d4cae | 1709 | ret = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, ac->ac_bh, |
7d1fe093 | 1710 | res->sr_bits, |
883d4cae MF |
1711 | le16_to_cpu(gd->bg_chain)); |
1712 | if (ret < 0) { | |
1713 | mlog_errno(ret); | |
1714 | goto out; | |
1715 | } | |
1716 | ||
1717 | ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, | |
7d1fe093 | 1718 | res->sr_bit_offset, res->sr_bits); |
db66c715 YL |
1719 | if (ret < 0) { |
1720 | ocfs2_rollback_alloc_dinode_counts(alloc_inode, ac->ac_bh, | |
1721 | res->sr_bits, | |
1722 | le16_to_cpu(gd->bg_chain)); | |
883d4cae | 1723 | mlog_errno(ret); |
db66c715 | 1724 | } |
883d4cae | 1725 | |
e49e2767 | 1726 | out_loc_only: |
883d4cae MF |
1727 | *bits_left = le16_to_cpu(gd->bg_free_bits_count); |
1728 | ||
1729 | out: | |
1730 | brelse(group_bh); | |
1731 | ||
1732 | return ret; | |
1733 | } | |
1734 | ||
ccd979bd | 1735 | static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, |
1fabe148 | 1736 | handle_t *handle, |
ccd979bd MF |
1737 | u32 bits_wanted, |
1738 | u32 min_bits, | |
7d1fe093 | 1739 | struct ocfs2_suballoc_result *res, |
883d4cae | 1740 | u16 *bits_left) |
ccd979bd MF |
1741 | { |
1742 | int status; | |
7d1fe093 | 1743 | u16 chain; |
ccd979bd | 1744 | u64 next_group; |
ccd979bd MF |
1745 | struct inode *alloc_inode = ac->ac_inode; |
1746 | struct buffer_head *group_bh = NULL; | |
1747 | struct buffer_head *prev_group_bh = NULL; | |
1748 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
1749 | struct ocfs2_chain_list *cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; | |
1750 | struct ocfs2_group_desc *bg; | |
1751 | ||
1752 | chain = ac->ac_chain; | |
2f73e135 TM |
1753 | trace_ocfs2_search_chain_begin( |
1754 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, | |
1755 | bits_wanted, chain); | |
ccd979bd | 1756 | |
68f64d47 JB |
1757 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1758 | le64_to_cpu(cl->cl_recs[chain].c_blkno), | |
1759 | &group_bh); | |
ccd979bd MF |
1760 | if (status < 0) { |
1761 | mlog_errno(status); | |
1762 | goto bail; | |
1763 | } | |
1764 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1765 | |
1766 | status = -ENOSPC; | |
1767 | /* for now, the chain search is a bit simplistic. We just use | |
1768 | * the 1st group with any empty bits. */ | |
1187c968 JB |
1769 | while ((status = ac->ac_group_search(alloc_inode, group_bh, |
1770 | bits_wanted, min_bits, | |
7d1fe093 JB |
1771 | ac->ac_max_block, |
1772 | res)) == -ENOSPC) { | |
ccd979bd MF |
1773 | if (!bg->bg_next_group) |
1774 | break; | |
a81cb88b MF |
1775 | |
1776 | brelse(prev_group_bh); | |
1777 | prev_group_bh = NULL; | |
1778 | ||
ccd979bd MF |
1779 | next_group = le64_to_cpu(bg->bg_next_group); |
1780 | prev_group_bh = group_bh; | |
1781 | group_bh = NULL; | |
68f64d47 JB |
1782 | status = ocfs2_read_group_descriptor(alloc_inode, fe, |
1783 | next_group, &group_bh); | |
ccd979bd MF |
1784 | if (status < 0) { |
1785 | mlog_errno(status); | |
1786 | goto bail; | |
1787 | } | |
1788 | bg = (struct ocfs2_group_desc *) group_bh->b_data; | |
ccd979bd MF |
1789 | } |
1790 | if (status < 0) { | |
1791 | if (status != -ENOSPC) | |
1792 | mlog_errno(status); | |
1793 | goto bail; | |
1794 | } | |
1795 | ||
2f73e135 TM |
1796 | trace_ocfs2_search_chain_succ( |
1797 | (unsigned long long)le64_to_cpu(bg->bg_blkno), res->sr_bits); | |
ccd979bd | 1798 | |
7d1fe093 | 1799 | res->sr_bg_blkno = le64_to_cpu(bg->bg_blkno); |
ccd979bd | 1800 | |
7d1fe093 | 1801 | BUG_ON(res->sr_bits == 0); |
13e434cf | 1802 | if (!status) |
ba206635 | 1803 | ocfs2_bg_discontig_fix_result(ac, bg, res); |
13e434cf | 1804 | |
e49e2767 MF |
1805 | /* |
1806 | * sr_bg_blkno might have been changed by | |
1807 | * ocfs2_bg_discontig_fix_result | |
1808 | */ | |
1809 | res->sr_bg_stable_blkno = group_bh->b_blocknr; | |
ccd979bd MF |
1810 | |
1811 | /* | |
1812 | * Keep track of previous block descriptor read. When | |
1813 | * we find a target, if we have read more than X | |
1814 | * number of descriptors, and the target is reasonably | |
1815 | * empty, relink him to top of his chain. | |
1816 | * | |
1817 | * We've read 0 extra blocks and only send one more to | |
1818 | * the transaction, yet the next guy to search has a | |
1819 | * much easier time. | |
1820 | * | |
1821 | * Do this *after* figuring out how many bits we're taking out | |
1822 | * of our target group. | |
1823 | */ | |
309a85b6 | 1824 | if (!ac->ac_disable_chain_relink && |
ccd979bd | 1825 | (prev_group_bh) && |
7d1fe093 | 1826 | (ocfs2_block_group_reasonably_empty(bg, res->sr_bits))) { |
ccd979bd MF |
1827 | status = ocfs2_relink_block_group(handle, alloc_inode, |
1828 | ac->ac_bh, group_bh, | |
1829 | prev_group_bh, chain); | |
1830 | if (status < 0) { | |
1831 | mlog_errno(status); | |
1832 | goto bail; | |
1833 | } | |
1834 | } | |
1835 | ||
e49e2767 MF |
1836 | if (ac->ac_find_loc_only) |
1837 | goto out_loc_only; | |
1838 | ||
d5134982 MF |
1839 | status = ocfs2_alloc_dinode_update_counts(alloc_inode, handle, |
1840 | ac->ac_bh, res->sr_bits, | |
1841 | chain); | |
1842 | if (status) { | |
ccd979bd MF |
1843 | mlog_errno(status); |
1844 | goto bail; | |
1845 | } | |
1846 | ||
ccd979bd MF |
1847 | status = ocfs2_block_group_set_bits(handle, |
1848 | alloc_inode, | |
1849 | bg, | |
1850 | group_bh, | |
7d1fe093 JB |
1851 | res->sr_bit_offset, |
1852 | res->sr_bits); | |
ccd979bd | 1853 | if (status < 0) { |
db66c715 YL |
1854 | ocfs2_rollback_alloc_dinode_counts(alloc_inode, |
1855 | ac->ac_bh, res->sr_bits, chain); | |
ccd979bd MF |
1856 | mlog_errno(status); |
1857 | goto bail; | |
1858 | } | |
1859 | ||
2f73e135 TM |
1860 | trace_ocfs2_search_chain_end( |
1861 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
1862 | res->sr_bits); | |
ccd979bd | 1863 | |
e49e2767 | 1864 | out_loc_only: |
883d4cae | 1865 | *bits_left = le16_to_cpu(bg->bg_free_bits_count); |
ccd979bd | 1866 | bail: |
a81cb88b MF |
1867 | brelse(group_bh); |
1868 | brelse(prev_group_bh); | |
ccd979bd | 1869 | |
c1e8d35e TM |
1870 | if (status) |
1871 | mlog_errno(status); | |
ccd979bd MF |
1872 | return status; |
1873 | } | |
1874 | ||
1875 | /* will give out up to bits_wanted contiguous bits. */ | |
aa8f8e93 | 1876 | static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, |
1fabe148 | 1877 | handle_t *handle, |
ccd979bd MF |
1878 | u32 bits_wanted, |
1879 | u32 min_bits, | |
7d1fe093 | 1880 | struct ocfs2_suballoc_result *res) |
ccd979bd MF |
1881 | { |
1882 | int status; | |
1883 | u16 victim, i; | |
883d4cae | 1884 | u16 bits_left = 0; |
b2b6ebf5 | 1885 | u64 hint = ac->ac_last_group; |
ccd979bd MF |
1886 | struct ocfs2_chain_list *cl; |
1887 | struct ocfs2_dinode *fe; | |
1888 | ||
ccd979bd MF |
1889 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
1890 | BUG_ON(bits_wanted > (ac->ac_bits_wanted - ac->ac_bits_given)); | |
1891 | BUG_ON(!ac->ac_bh); | |
1892 | ||
1893 | fe = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
10995aa2 JB |
1894 | |
1895 | /* The bh was validated by the inode read during | |
1896 | * ocfs2_reserve_suballoc_bits(). Any corruption is a code bug. */ | |
1897 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
1898 | ||
ccd979bd MF |
1899 | if (le32_to_cpu(fe->id1.bitmap1.i_used) >= |
1900 | le32_to_cpu(fe->id1.bitmap1.i_total)) { | |
17a5b9ab | 1901 | status = ocfs2_error(ac->ac_inode->i_sb, |
7ecef14a JP |
1902 | "Chain allocator dinode %llu has %u used bits but only %u total\n", |
1903 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
1904 | le32_to_cpu(fe->id1.bitmap1.i_used), | |
1905 | le32_to_cpu(fe->id1.bitmap1.i_total)); | |
ccd979bd MF |
1906 | goto bail; |
1907 | } | |
1908 | ||
b2b6ebf5 | 1909 | res->sr_bg_blkno = hint; |
7d1fe093 | 1910 | if (res->sr_bg_blkno) { |
883d4cae MF |
1911 | /* Attempt to short-circuit the usual search mechanism |
1912 | * by jumping straight to the most recently used | |
b595076a | 1913 | * allocation group. This helps us maintain some |
883d4cae | 1914 | * contiguousness across allocations. */ |
da5cbf2f | 1915 | status = ocfs2_search_one_group(ac, handle, bits_wanted, |
7d1fe093 JB |
1916 | min_bits, res, &bits_left); |
1917 | if (!status) | |
883d4cae | 1918 | goto set_hint; |
883d4cae MF |
1919 | if (status < 0 && status != -ENOSPC) { |
1920 | mlog_errno(status); | |
1921 | goto bail; | |
1922 | } | |
1923 | } | |
1924 | ||
ccd979bd MF |
1925 | cl = (struct ocfs2_chain_list *) &fe->id2.i_chain; |
1926 | ||
1927 | victim = ocfs2_find_victim_chain(cl); | |
1928 | ac->ac_chain = victim; | |
ccd979bd | 1929 | |
7d1fe093 JB |
1930 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
1931 | res, &bits_left); | |
b2b6ebf5 | 1932 | if (!status) { |
1d1aff8c JQ |
1933 | if (ocfs2_is_cluster_bitmap(ac->ac_inode)) |
1934 | hint = res->sr_bg_blkno; | |
1935 | else | |
1936 | hint = ocfs2_group_from_res(res); | |
883d4cae | 1937 | goto set_hint; |
b2b6ebf5 | 1938 | } |
ccd979bd MF |
1939 | if (status < 0 && status != -ENOSPC) { |
1940 | mlog_errno(status); | |
1941 | goto bail; | |
1942 | } | |
1943 | ||
2f73e135 | 1944 | trace_ocfs2_claim_suballoc_bits(victim); |
ccd979bd MF |
1945 | |
1946 | /* If we didn't pick a good victim, then just default to | |
1947 | * searching each chain in order. Don't allow chain relinking | |
1948 | * because we only calculate enough journal credits for one | |
1949 | * relink per alloc. */ | |
309a85b6 | 1950 | ac->ac_disable_chain_relink = 1; |
ccd979bd MF |
1951 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i ++) { |
1952 | if (i == victim) | |
1953 | continue; | |
1954 | if (!cl->cl_recs[i].c_free) | |
1955 | continue; | |
1956 | ||
1957 | ac->ac_chain = i; | |
da5cbf2f | 1958 | status = ocfs2_search_chain(ac, handle, bits_wanted, min_bits, |
7d1fe093 | 1959 | res, &bits_left); |
b2b6ebf5 MF |
1960 | if (!status) { |
1961 | hint = ocfs2_group_from_res(res); | |
ccd979bd | 1962 | break; |
b2b6ebf5 | 1963 | } |
ccd979bd MF |
1964 | if (status < 0 && status != -ENOSPC) { |
1965 | mlog_errno(status); | |
1966 | goto bail; | |
1967 | } | |
1968 | } | |
ccd979bd | 1969 | |
883d4cae MF |
1970 | set_hint: |
1971 | if (status != -ENOSPC) { | |
1972 | /* If the next search of this group is not likely to | |
1973 | * yield a suitable extent, then we reset the last | |
1974 | * group hint so as to not waste a disk read */ | |
1975 | if (bits_left < min_bits) | |
1976 | ac->ac_last_group = 0; | |
1977 | else | |
b2b6ebf5 | 1978 | ac->ac_last_group = hint; |
883d4cae MF |
1979 | } |
1980 | ||
1981 | bail: | |
c1e8d35e TM |
1982 | if (status) |
1983 | mlog_errno(status); | |
ccd979bd MF |
1984 | return status; |
1985 | } | |
1986 | ||
1ed9b777 | 1987 | int ocfs2_claim_metadata(handle_t *handle, |
ccd979bd MF |
1988 | struct ocfs2_alloc_context *ac, |
1989 | u32 bits_wanted, | |
2b6cb576 | 1990 | u64 *suballoc_loc, |
ccd979bd MF |
1991 | u16 *suballoc_bit_start, |
1992 | unsigned int *num_bits, | |
1993 | u64 *blkno_start) | |
1994 | { | |
1995 | int status; | |
ba206635 | 1996 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
ccd979bd MF |
1997 | |
1998 | BUG_ON(!ac); | |
1999 | BUG_ON(ac->ac_bits_wanted < (ac->ac_bits_given + bits_wanted)); | |
2000 | BUG_ON(ac->ac_which != OCFS2_AC_USE_META); | |
ccd979bd | 2001 | |
aa8f8e93 | 2002 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2003 | handle, |
ccd979bd MF |
2004 | bits_wanted, |
2005 | 1, | |
7d1fe093 | 2006 | &res); |
ccd979bd MF |
2007 | if (status < 0) { |
2008 | mlog_errno(status); | |
2009 | goto bail; | |
2010 | } | |
1ed9b777 | 2011 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2012 | |
2b6cb576 | 2013 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2014 | *suballoc_bit_start = res.sr_bit_offset; |
ba206635 | 2015 | *blkno_start = res.sr_blkno; |
7d1fe093 JB |
2016 | ac->ac_bits_given += res.sr_bits; |
2017 | *num_bits = res.sr_bits; | |
ccd979bd MF |
2018 | status = 0; |
2019 | bail: | |
c1e8d35e TM |
2020 | if (status) |
2021 | mlog_errno(status); | |
ccd979bd MF |
2022 | return status; |
2023 | } | |
2024 | ||
13821151 | 2025 | static void ocfs2_init_inode_ac_group(struct inode *dir, |
abf1b3cb | 2026 | struct buffer_head *parent_di_bh, |
13821151 TM |
2027 | struct ocfs2_alloc_context *ac) |
2028 | { | |
abf1b3cb | 2029 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_di_bh->b_data; |
13821151 TM |
2030 | /* |
2031 | * Try to allocate inodes from some specific group. | |
2032 | * | |
2033 | * If the parent dir has recorded the last group used in allocation, | |
2034 | * cool, use it. Otherwise if we try to allocate new inode from the | |
2035 | * same slot the parent dir belongs to, use the same chunk. | |
2036 | * | |
2037 | * We are very careful here to avoid the mistake of setting | |
2038 | * ac_last_group to a group descriptor from a different (unlocked) slot. | |
2039 | */ | |
2040 | if (OCFS2_I(dir)->ip_last_used_group && | |
2041 | OCFS2_I(dir)->ip_last_used_slot == ac->ac_alloc_slot) | |
2042 | ac->ac_last_group = OCFS2_I(dir)->ip_last_used_group; | |
abf1b3cb TM |
2043 | else if (le16_to_cpu(di->i_suballoc_slot) == ac->ac_alloc_slot) { |
2044 | if (di->i_suballoc_loc) | |
2045 | ac->ac_last_group = le64_to_cpu(di->i_suballoc_loc); | |
2046 | else | |
2047 | ac->ac_last_group = ocfs2_which_suballoc_group( | |
2048 | le64_to_cpu(di->i_blkno), | |
2049 | le16_to_cpu(di->i_suballoc_bit)); | |
2050 | } | |
13821151 TM |
2051 | } |
2052 | ||
2053 | static inline void ocfs2_save_inode_ac_group(struct inode *dir, | |
2054 | struct ocfs2_alloc_context *ac) | |
2055 | { | |
2056 | OCFS2_I(dir)->ip_last_used_group = ac->ac_last_group; | |
2057 | OCFS2_I(dir)->ip_last_used_slot = ac->ac_alloc_slot; | |
2058 | } | |
2059 | ||
e49e2767 MF |
2060 | int ocfs2_find_new_inode_loc(struct inode *dir, |
2061 | struct buffer_head *parent_fe_bh, | |
2062 | struct ocfs2_alloc_context *ac, | |
2063 | u64 *fe_blkno) | |
2064 | { | |
2065 | int ret; | |
2066 | handle_t *handle = NULL; | |
2067 | struct ocfs2_suballoc_result *res; | |
2068 | ||
2069 | BUG_ON(!ac); | |
2070 | BUG_ON(ac->ac_bits_given != 0); | |
2071 | BUG_ON(ac->ac_bits_wanted != 1); | |
2072 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
2073 | ||
2074 | res = kzalloc(sizeof(*res), GFP_NOFS); | |
2075 | if (res == NULL) { | |
2076 | ret = -ENOMEM; | |
2077 | mlog_errno(ret); | |
2078 | goto out; | |
2079 | } | |
2080 | ||
2081 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); | |
2082 | ||
2083 | /* | |
2084 | * The handle started here is for chain relink. Alternatively, | |
2085 | * we could just disable relink for these calls. | |
2086 | */ | |
2087 | handle = ocfs2_start_trans(OCFS2_SB(dir->i_sb), OCFS2_SUBALLOC_ALLOC); | |
2088 | if (IS_ERR(handle)) { | |
2089 | ret = PTR_ERR(handle); | |
2090 | handle = NULL; | |
2091 | mlog_errno(ret); | |
2092 | goto out; | |
2093 | } | |
2094 | ||
2095 | /* | |
2096 | * This will instruct ocfs2_claim_suballoc_bits and | |
2097 | * ocfs2_search_one_group to search but save actual allocation | |
2098 | * for later. | |
2099 | */ | |
2100 | ac->ac_find_loc_only = 1; | |
2101 | ||
2102 | ret = ocfs2_claim_suballoc_bits(ac, handle, 1, 1, res); | |
2103 | if (ret < 0) { | |
2104 | mlog_errno(ret); | |
2105 | goto out; | |
2106 | } | |
2107 | ||
2108 | ac->ac_find_loc_priv = res; | |
2109 | *fe_blkno = res->sr_blkno; | |
6fdb702d | 2110 | ocfs2_update_inode_fsync_trans(handle, dir, 0); |
e49e2767 MF |
2111 | out: |
2112 | if (handle) | |
2113 | ocfs2_commit_trans(OCFS2_SB(dir->i_sb), handle); | |
2114 | ||
2115 | if (ret) | |
2116 | kfree(res); | |
2117 | ||
2118 | return ret; | |
2119 | } | |
2120 | ||
2121 | int ocfs2_claim_new_inode_at_loc(handle_t *handle, | |
2122 | struct inode *dir, | |
2123 | struct ocfs2_alloc_context *ac, | |
2124 | u64 *suballoc_loc, | |
2125 | u16 *suballoc_bit, | |
2126 | u64 di_blkno) | |
2127 | { | |
2128 | int ret; | |
2129 | u16 chain; | |
2130 | struct ocfs2_suballoc_result *res = ac->ac_find_loc_priv; | |
2131 | struct buffer_head *bg_bh = NULL; | |
2132 | struct ocfs2_group_desc *bg; | |
2133 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) ac->ac_bh->b_data; | |
2134 | ||
2135 | /* | |
2136 | * Since di_blkno is being passed back in, we check for any | |
2137 | * inconsistencies which may have happened between | |
2138 | * calls. These are code bugs as di_blkno is not expected to | |
2139 | * change once returned from ocfs2_find_new_inode_loc() | |
2140 | */ | |
2141 | BUG_ON(res->sr_blkno != di_blkno); | |
2142 | ||
2143 | ret = ocfs2_read_group_descriptor(ac->ac_inode, di, | |
2144 | res->sr_bg_stable_blkno, &bg_bh); | |
2145 | if (ret) { | |
2146 | mlog_errno(ret); | |
2147 | goto out; | |
2148 | } | |
2149 | ||
2150 | bg = (struct ocfs2_group_desc *) bg_bh->b_data; | |
2151 | chain = le16_to_cpu(bg->bg_chain); | |
2152 | ||
2153 | ret = ocfs2_alloc_dinode_update_counts(ac->ac_inode, handle, | |
2154 | ac->ac_bh, res->sr_bits, | |
2155 | chain); | |
2156 | if (ret) { | |
2157 | mlog_errno(ret); | |
2158 | goto out; | |
2159 | } | |
2160 | ||
2161 | ret = ocfs2_block_group_set_bits(handle, | |
2162 | ac->ac_inode, | |
2163 | bg, | |
2164 | bg_bh, | |
2165 | res->sr_bit_offset, | |
2166 | res->sr_bits); | |
2167 | if (ret < 0) { | |
db66c715 YL |
2168 | ocfs2_rollback_alloc_dinode_counts(ac->ac_inode, |
2169 | ac->ac_bh, res->sr_bits, chain); | |
e49e2767 MF |
2170 | mlog_errno(ret); |
2171 | goto out; | |
2172 | } | |
2173 | ||
2f73e135 TM |
2174 | trace_ocfs2_claim_new_inode_at_loc((unsigned long long)di_blkno, |
2175 | res->sr_bits); | |
e49e2767 MF |
2176 | |
2177 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); | |
2178 | ||
2179 | BUG_ON(res->sr_bits != 1); | |
2180 | ||
2181 | *suballoc_loc = res->sr_bg_blkno; | |
2182 | *suballoc_bit = res->sr_bit_offset; | |
2183 | ac->ac_bits_given++; | |
2184 | ocfs2_save_inode_ac_group(dir, ac); | |
2185 | ||
2186 | out: | |
2187 | brelse(bg_bh); | |
2188 | ||
2189 | return ret; | |
2190 | } | |
2191 | ||
1ed9b777 | 2192 | int ocfs2_claim_new_inode(handle_t *handle, |
13821151 TM |
2193 | struct inode *dir, |
2194 | struct buffer_head *parent_fe_bh, | |
ccd979bd | 2195 | struct ocfs2_alloc_context *ac, |
2b6cb576 | 2196 | u64 *suballoc_loc, |
ccd979bd MF |
2197 | u16 *suballoc_bit, |
2198 | u64 *fe_blkno) | |
2199 | { | |
2200 | int status; | |
2b6cb576 | 2201 | struct ocfs2_suballoc_result res; |
ccd979bd | 2202 | |
ccd979bd MF |
2203 | BUG_ON(!ac); |
2204 | BUG_ON(ac->ac_bits_given != 0); | |
2205 | BUG_ON(ac->ac_bits_wanted != 1); | |
2206 | BUG_ON(ac->ac_which != OCFS2_AC_USE_INODE); | |
ccd979bd | 2207 | |
13821151 TM |
2208 | ocfs2_init_inode_ac_group(dir, parent_fe_bh, ac); |
2209 | ||
aa8f8e93 | 2210 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2211 | handle, |
ccd979bd MF |
2212 | 1, |
2213 | 1, | |
7d1fe093 | 2214 | &res); |
ccd979bd MF |
2215 | if (status < 0) { |
2216 | mlog_errno(status); | |
2217 | goto bail; | |
2218 | } | |
1ed9b777 | 2219 | atomic_inc(&OCFS2_SB(ac->ac_inode->i_sb)->alloc_stats.bg_allocs); |
ccd979bd | 2220 | |
7d1fe093 | 2221 | BUG_ON(res.sr_bits != 1); |
ccd979bd | 2222 | |
2b6cb576 | 2223 | *suballoc_loc = res.sr_bg_blkno; |
7d1fe093 | 2224 | *suballoc_bit = res.sr_bit_offset; |
ba206635 | 2225 | *fe_blkno = res.sr_blkno; |
ccd979bd | 2226 | ac->ac_bits_given++; |
13821151 | 2227 | ocfs2_save_inode_ac_group(dir, ac); |
ccd979bd MF |
2228 | status = 0; |
2229 | bail: | |
c1e8d35e TM |
2230 | if (status) |
2231 | mlog_errno(status); | |
ccd979bd MF |
2232 | return status; |
2233 | } | |
2234 | ||
2235 | /* translate a group desc. blkno and it's bitmap offset into | |
2236 | * disk cluster offset. */ | |
2237 | static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode, | |
2238 | u64 bg_blkno, | |
2239 | u16 bg_bit_off) | |
2240 | { | |
2241 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2242 | u32 cluster = 0; | |
2243 | ||
2244 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2245 | ||
2246 | if (bg_blkno != osb->first_cluster_group_blkno) | |
2247 | cluster = ocfs2_blocks_to_clusters(inode->i_sb, bg_blkno); | |
2248 | cluster += (u32) bg_bit_off; | |
2249 | return cluster; | |
2250 | } | |
2251 | ||
2252 | /* given a cluster offset, calculate which block group it belongs to | |
2253 | * and return that block offset. */ | |
d659072f | 2254 | u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster) |
ccd979bd MF |
2255 | { |
2256 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2257 | u32 group_no; | |
2258 | ||
2259 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2260 | ||
2261 | group_no = cluster / osb->bitmap_cpg; | |
2262 | if (!group_no) | |
2263 | return osb->first_cluster_group_blkno; | |
2264 | return ocfs2_clusters_to_blocks(inode->i_sb, | |
2265 | group_no * osb->bitmap_cpg); | |
2266 | } | |
2267 | ||
2268 | /* given the block number of a cluster start, calculate which cluster | |
2269 | * group and descriptor bitmap offset that corresponds to. */ | |
2270 | static inline void ocfs2_block_to_cluster_group(struct inode *inode, | |
2271 | u64 data_blkno, | |
2272 | u64 *bg_blkno, | |
2273 | u16 *bg_bit_off) | |
2274 | { | |
2275 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2276 | u32 data_cluster = ocfs2_blocks_to_clusters(osb->sb, data_blkno); | |
2277 | ||
2278 | BUG_ON(!ocfs2_is_cluster_bitmap(inode)); | |
2279 | ||
2280 | *bg_blkno = ocfs2_which_cluster_group(inode, | |
2281 | data_cluster); | |
2282 | ||
2283 | if (*bg_blkno == osb->first_cluster_group_blkno) | |
2284 | *bg_bit_off = (u16) data_cluster; | |
2285 | else | |
2286 | *bg_bit_off = (u16) ocfs2_blocks_to_clusters(osb->sb, | |
2287 | data_blkno - *bg_blkno); | |
2288 | } | |
2289 | ||
2290 | /* | |
2291 | * min_bits - minimum contiguous chunk from this total allocation we | |
2292 | * can handle. set to what we asked for originally for a full | |
2293 | * contig. allocation, set to '1' to indicate we can deal with extents | |
2294 | * of any size. | |
2295 | */ | |
1ed9b777 | 2296 | int __ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2297 | struct ocfs2_alloc_context *ac, |
2298 | u32 min_clusters, | |
2299 | u32 max_clusters, | |
2300 | u32 *cluster_start, | |
2301 | u32 *num_clusters) | |
ccd979bd MF |
2302 | { |
2303 | int status; | |
415cb800 | 2304 | unsigned int bits_wanted = max_clusters; |
ba206635 | 2305 | struct ocfs2_suballoc_result res = { .sr_blkno = 0, }; |
1ed9b777 | 2306 | struct ocfs2_super *osb = OCFS2_SB(ac->ac_inode->i_sb); |
ccd979bd | 2307 | |
ccd979bd MF |
2308 | BUG_ON(ac->ac_bits_given >= ac->ac_bits_wanted); |
2309 | ||
2310 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL | |
2311 | && ac->ac_which != OCFS2_AC_USE_MAIN); | |
ccd979bd MF |
2312 | |
2313 | if (ac->ac_which == OCFS2_AC_USE_LOCAL) { | |
33d5d380 MF |
2314 | WARN_ON(min_clusters > 1); |
2315 | ||
ccd979bd MF |
2316 | status = ocfs2_claim_local_alloc_bits(osb, |
2317 | handle, | |
2318 | ac, | |
2319 | bits_wanted, | |
2320 | cluster_start, | |
2321 | num_clusters); | |
2322 | if (!status) | |
2323 | atomic_inc(&osb->alloc_stats.local_data); | |
2324 | } else { | |
2325 | if (min_clusters > (osb->bitmap_cpg - 1)) { | |
2326 | /* The only paths asking for contiguousness | |
2327 | * should know about this already. */ | |
2fbe8d1e SM |
2328 | mlog(ML_ERROR, "minimum allocation requested %u exceeds " |
2329 | "group bitmap size %u!\n", min_clusters, | |
2330 | osb->bitmap_cpg); | |
ccd979bd MF |
2331 | status = -ENOSPC; |
2332 | goto bail; | |
2333 | } | |
2334 | /* clamp the current request down to a realistic size. */ | |
2335 | if (bits_wanted > (osb->bitmap_cpg - 1)) | |
2336 | bits_wanted = osb->bitmap_cpg - 1; | |
2337 | ||
aa8f8e93 | 2338 | status = ocfs2_claim_suballoc_bits(ac, |
da5cbf2f | 2339 | handle, |
ccd979bd MF |
2340 | bits_wanted, |
2341 | min_clusters, | |
7d1fe093 | 2342 | &res); |
ccd979bd | 2343 | if (!status) { |
ba206635 | 2344 | BUG_ON(res.sr_blkno); /* cluster alloc can't set */ |
ccd979bd MF |
2345 | *cluster_start = |
2346 | ocfs2_desc_bitmap_to_cluster_off(ac->ac_inode, | |
7d1fe093 JB |
2347 | res.sr_bg_blkno, |
2348 | res.sr_bit_offset); | |
ccd979bd | 2349 | atomic_inc(&osb->alloc_stats.bitmap_data); |
4711954e | 2350 | *num_clusters = res.sr_bits; |
ccd979bd MF |
2351 | } |
2352 | } | |
2353 | if (status < 0) { | |
2354 | if (status != -ENOSPC) | |
2355 | mlog_errno(status); | |
2356 | goto bail; | |
2357 | } | |
2358 | ||
4711954e | 2359 | ac->ac_bits_given += *num_clusters; |
ccd979bd MF |
2360 | |
2361 | bail: | |
c1e8d35e TM |
2362 | if (status) |
2363 | mlog_errno(status); | |
ccd979bd MF |
2364 | return status; |
2365 | } | |
2366 | ||
1ed9b777 | 2367 | int ocfs2_claim_clusters(handle_t *handle, |
415cb800 MF |
2368 | struct ocfs2_alloc_context *ac, |
2369 | u32 min_clusters, | |
2370 | u32 *cluster_start, | |
2371 | u32 *num_clusters) | |
2372 | { | |
2373 | unsigned int bits_wanted = ac->ac_bits_wanted - ac->ac_bits_given; | |
2374 | ||
1ed9b777 | 2375 | return __ocfs2_claim_clusters(handle, ac, min_clusters, |
415cb800 MF |
2376 | bits_wanted, cluster_start, num_clusters); |
2377 | } | |
2378 | ||
b4414eea MF |
2379 | static int ocfs2_block_group_clear_bits(handle_t *handle, |
2380 | struct inode *alloc_inode, | |
2381 | struct ocfs2_group_desc *bg, | |
2382 | struct buffer_head *group_bh, | |
2383 | unsigned int bit_off, | |
2384 | unsigned int num_bits, | |
2385 | void (*undo_fn)(unsigned int bit, | |
2386 | unsigned long *bmap)) | |
ccd979bd MF |
2387 | { |
2388 | int status; | |
2389 | unsigned int tmp; | |
ccd979bd | 2390 | struct ocfs2_group_desc *undo_bg = NULL; |
46417064 | 2391 | struct journal_head *jh; |
ccd979bd | 2392 | |
42035306 JB |
2393 | /* The caller got this descriptor from |
2394 | * ocfs2_read_group_descriptor(). Any corruption is a code bug. */ | |
2395 | BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg)); | |
ccd979bd | 2396 | |
2f73e135 | 2397 | trace_ocfs2_block_group_clear_bits(bit_off, num_bits); |
ccd979bd | 2398 | |
b4414eea | 2399 | BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode)); |
0cf2f763 | 2400 | status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode), |
b4414eea MF |
2401 | group_bh, |
2402 | undo_fn ? | |
2403 | OCFS2_JOURNAL_ACCESS_UNDO : | |
2404 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2405 | if (status < 0) { |
2406 | mlog_errno(status); | |
2407 | goto bail; | |
2408 | } | |
2409 | ||
46417064 | 2410 | jh = bh2jh(group_bh); |
b4414eea | 2411 | if (undo_fn) { |
46417064 TG |
2412 | spin_lock(&jh->b_state_lock); |
2413 | undo_bg = (struct ocfs2_group_desc *) jh->b_committed_data; | |
94e41ecf SM |
2414 | BUG_ON(!undo_bg); |
2415 | } | |
ccd979bd MF |
2416 | |
2417 | tmp = num_bits; | |
2418 | while(tmp--) { | |
2419 | ocfs2_clear_bit((bit_off + tmp), | |
2420 | (unsigned long *) bg->bg_bitmap); | |
b4414eea MF |
2421 | if (undo_fn) |
2422 | undo_fn(bit_off + tmp, | |
2423 | (unsigned long *) undo_bg->bg_bitmap); | |
ccd979bd MF |
2424 | } |
2425 | le16_add_cpu(&bg->bg_free_bits_count, num_bits); | |
9b5cd10e | 2426 | if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) { |
e75ed71b | 2427 | if (undo_fn) |
46417064 | 2428 | spin_unlock(&jh->b_state_lock); |
7ecef14a JP |
2429 | return ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit count %u but claims %u are freed. num_bits %d\n", |
2430 | (unsigned long long)le64_to_cpu(bg->bg_blkno), | |
2431 | le16_to_cpu(bg->bg_bits), | |
2432 | le16_to_cpu(bg->bg_free_bits_count), | |
2433 | num_bits); | |
9b5cd10e | 2434 | } |
ccd979bd | 2435 | |
b4414eea | 2436 | if (undo_fn) |
46417064 | 2437 | spin_unlock(&jh->b_state_lock); |
94e41ecf | 2438 | |
ec20cec7 | 2439 | ocfs2_journal_dirty(handle, group_bh); |
ccd979bd MF |
2440 | bail: |
2441 | return status; | |
2442 | } | |
2443 | ||
2444 | /* | |
2445 | * expects the suballoc inode to already be locked. | |
2446 | */ | |
b4414eea MF |
2447 | static int _ocfs2_free_suballoc_bits(handle_t *handle, |
2448 | struct inode *alloc_inode, | |
2449 | struct buffer_head *alloc_bh, | |
2450 | unsigned int start_bit, | |
2451 | u64 bg_blkno, | |
2452 | unsigned int count, | |
2453 | void (*undo_fn)(unsigned int bit, | |
2454 | unsigned long *bitmap)) | |
ccd979bd MF |
2455 | { |
2456 | int status = 0; | |
2457 | u32 tmp_used; | |
ccd979bd MF |
2458 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) alloc_bh->b_data; |
2459 | struct ocfs2_chain_list *cl = &fe->id2.i_chain; | |
2460 | struct buffer_head *group_bh = NULL; | |
2461 | struct ocfs2_group_desc *group; | |
2462 | ||
10995aa2 JB |
2463 | /* The alloc_bh comes from ocfs2_free_dinode() or |
2464 | * ocfs2_free_clusters(). The callers have all locked the | |
2465 | * allocator and gotten alloc_bh from the lock call. This | |
25985edc | 2466 | * validates the dinode buffer. Any corruption that has happened |
10995aa2 JB |
2467 | * is a code bug. */ |
2468 | BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); | |
ccd979bd MF |
2469 | BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)); |
2470 | ||
2f73e135 TM |
2471 | trace_ocfs2_free_suballoc_bits( |
2472 | (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, | |
2473 | (unsigned long long)bg_blkno, | |
2474 | start_bit, count); | |
ccd979bd | 2475 | |
68f64d47 JB |
2476 | status = ocfs2_read_group_descriptor(alloc_inode, fe, bg_blkno, |
2477 | &group_bh); | |
ccd979bd MF |
2478 | if (status < 0) { |
2479 | mlog_errno(status); | |
2480 | goto bail; | |
2481 | } | |
ccd979bd | 2482 | group = (struct ocfs2_group_desc *) group_bh->b_data; |
68f64d47 | 2483 | |
ccd979bd MF |
2484 | BUG_ON((count + start_bit) > le16_to_cpu(group->bg_bits)); |
2485 | ||
2486 | status = ocfs2_block_group_clear_bits(handle, alloc_inode, | |
2487 | group, group_bh, | |
b4414eea | 2488 | start_bit, count, undo_fn); |
ccd979bd MF |
2489 | if (status < 0) { |
2490 | mlog_errno(status); | |
2491 | goto bail; | |
2492 | } | |
2493 | ||
0cf2f763 JB |
2494 | status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode), |
2495 | alloc_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
2496 | if (status < 0) { |
2497 | mlog_errno(status); | |
a47726bc JQ |
2498 | ocfs2_block_group_set_bits(handle, alloc_inode, group, group_bh, |
2499 | start_bit, count); | |
ccd979bd MF |
2500 | goto bail; |
2501 | } | |
2502 | ||
2503 | le32_add_cpu(&cl->cl_recs[le16_to_cpu(group->bg_chain)].c_free, | |
2504 | count); | |
2505 | tmp_used = le32_to_cpu(fe->id1.bitmap1.i_used); | |
2506 | fe->id1.bitmap1.i_used = cpu_to_le32(tmp_used - count); | |
ec20cec7 | 2507 | ocfs2_journal_dirty(handle, alloc_bh); |
ccd979bd MF |
2508 | |
2509 | bail: | |
a81cb88b | 2510 | brelse(group_bh); |
ccd979bd MF |
2511 | return status; |
2512 | } | |
2513 | ||
b4414eea MF |
2514 | int ocfs2_free_suballoc_bits(handle_t *handle, |
2515 | struct inode *alloc_inode, | |
2516 | struct buffer_head *alloc_bh, | |
2517 | unsigned int start_bit, | |
2518 | u64 bg_blkno, | |
2519 | unsigned int count) | |
2520 | { | |
2521 | return _ocfs2_free_suballoc_bits(handle, alloc_inode, alloc_bh, | |
2522 | start_bit, bg_blkno, count, NULL); | |
2523 | } | |
2524 | ||
1fabe148 | 2525 | int ocfs2_free_dinode(handle_t *handle, |
ccd979bd MF |
2526 | struct inode *inode_alloc_inode, |
2527 | struct buffer_head *inode_alloc_bh, | |
2528 | struct ocfs2_dinode *di) | |
2529 | { | |
2530 | u64 blk = le64_to_cpu(di->i_blkno); | |
2531 | u16 bit = le16_to_cpu(di->i_suballoc_bit); | |
2532 | u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2533 | ||
74380c47 TM |
2534 | if (di->i_suballoc_loc) |
2535 | bg_blkno = le64_to_cpu(di->i_suballoc_loc); | |
ccd979bd MF |
2536 | return ocfs2_free_suballoc_bits(handle, inode_alloc_inode, |
2537 | inode_alloc_bh, bit, bg_blkno, 1); | |
2538 | } | |
2539 | ||
b4414eea MF |
2540 | static int _ocfs2_free_clusters(handle_t *handle, |
2541 | struct inode *bitmap_inode, | |
2542 | struct buffer_head *bitmap_bh, | |
2543 | u64 start_blk, | |
2544 | unsigned int num_clusters, | |
2545 | void (*undo_fn)(unsigned int bit, | |
2546 | unsigned long *bitmap)) | |
ccd979bd MF |
2547 | { |
2548 | int status; | |
2549 | u16 bg_start_bit; | |
2550 | u64 bg_blkno; | |
ccd979bd MF |
2551 | |
2552 | /* You can't ever have a contiguous set of clusters | |
2553 | * bigger than a block group bitmap so we never have to worry | |
ef6b689b TM |
2554 | * about looping on them. |
2555 | * This is expensive. We can safely remove once this stuff has | |
ccd979bd | 2556 | * gotten tested really well. */ |
dd7b5f9d CG |
2557 | BUG_ON(start_blk != ocfs2_clusters_to_blocks(bitmap_inode->i_sb, |
2558 | ocfs2_blocks_to_clusters(bitmap_inode->i_sb, | |
2559 | start_blk))); | |
ccd979bd | 2560 | |
ccd979bd MF |
2561 | |
2562 | ocfs2_block_to_cluster_group(bitmap_inode, start_blk, &bg_blkno, | |
2563 | &bg_start_bit); | |
2564 | ||
2f73e135 TM |
2565 | trace_ocfs2_free_clusters((unsigned long long)bg_blkno, |
2566 | (unsigned long long)start_blk, | |
2567 | bg_start_bit, num_clusters); | |
ccd979bd | 2568 | |
b4414eea MF |
2569 | status = _ocfs2_free_suballoc_bits(handle, bitmap_inode, bitmap_bh, |
2570 | bg_start_bit, bg_blkno, | |
2571 | num_clusters, undo_fn); | |
9c7af40b | 2572 | if (status < 0) { |
ccd979bd | 2573 | mlog_errno(status); |
9c7af40b MF |
2574 | goto out; |
2575 | } | |
2576 | ||
2577 | ocfs2_local_alloc_seen_free_bits(OCFS2_SB(bitmap_inode->i_sb), | |
2578 | num_clusters); | |
ccd979bd | 2579 | |
9c7af40b | 2580 | out: |
ccd979bd MF |
2581 | return status; |
2582 | } | |
2583 | ||
b4414eea MF |
2584 | int ocfs2_free_clusters(handle_t *handle, |
2585 | struct inode *bitmap_inode, | |
2586 | struct buffer_head *bitmap_bh, | |
2587 | u64 start_blk, | |
2588 | unsigned int num_clusters) | |
2589 | { | |
2590 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2591 | start_blk, num_clusters, | |
2592 | _ocfs2_set_bit); | |
2593 | } | |
2594 | ||
2595 | /* | |
2596 | * Give never-used clusters back to the global bitmap. We don't need | |
2597 | * to protect these bits in the undo buffer. | |
2598 | */ | |
2599 | int ocfs2_release_clusters(handle_t *handle, | |
2600 | struct inode *bitmap_inode, | |
2601 | struct buffer_head *bitmap_bh, | |
2602 | u64 start_blk, | |
2603 | unsigned int num_clusters) | |
2604 | { | |
2605 | return _ocfs2_free_clusters(handle, bitmap_inode, bitmap_bh, | |
2606 | start_blk, num_clusters, | |
2607 | _ocfs2_clear_bit); | |
2608 | } | |
2609 | ||
e7d4cb6b TM |
2610 | /* |
2611 | * For a given allocation, determine which allocators will need to be | |
2612 | * accessed, and lock them, reserving the appropriate number of bits. | |
2613 | * | |
2614 | * Sparse file systems call this from ocfs2_write_begin_nolock() | |
2615 | * and ocfs2_allocate_unwritten_extents(). | |
2616 | * | |
2617 | * File systems which don't support holes call this from | |
2618 | * ocfs2_extend_allocation(). | |
2619 | */ | |
f99b9b7c JB |
2620 | int ocfs2_lock_allocators(struct inode *inode, |
2621 | struct ocfs2_extent_tree *et, | |
e7d4cb6b TM |
2622 | u32 clusters_to_add, u32 extents_to_split, |
2623 | struct ocfs2_alloc_context **data_ac, | |
f99b9b7c | 2624 | struct ocfs2_alloc_context **meta_ac) |
e7d4cb6b TM |
2625 | { |
2626 | int ret = 0, num_free_extents; | |
2627 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; | |
2628 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2629 | ||
2630 | *meta_ac = NULL; | |
2631 | if (data_ac) | |
2632 | *data_ac = NULL; | |
2633 | ||
2634 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); | |
2635 | ||
964f14a0 | 2636 | num_free_extents = ocfs2_num_free_extents(et); |
e7d4cb6b TM |
2637 | if (num_free_extents < 0) { |
2638 | ret = num_free_extents; | |
2639 | mlog_errno(ret); | |
2640 | goto out; | |
2641 | } | |
2642 | ||
2643 | /* | |
2644 | * Sparse allocation file systems need to be more conservative | |
2645 | * with reserving room for expansion - the actual allocation | |
2646 | * happens while we've got a journal handle open so re-taking | |
2647 | * a cluster lock (because we ran out of room for another | |
2648 | * extent) will violate ordering rules. | |
2649 | * | |
2650 | * Most of the time we'll only be seeing this 1 cluster at a time | |
2651 | * anyway. | |
2652 | * | |
2653 | * Always lock for any unwritten extents - we might want to | |
2654 | * add blocks during a split. | |
2655 | */ | |
2656 | if (!num_free_extents || | |
2657 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { | |
f99b9b7c | 2658 | ret = ocfs2_reserve_new_metadata(osb, et->et_root_el, meta_ac); |
e7d4cb6b TM |
2659 | if (ret < 0) { |
2660 | if (ret != -ENOSPC) | |
2661 | mlog_errno(ret); | |
2662 | goto out; | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | if (clusters_to_add == 0) | |
2667 | goto out; | |
2668 | ||
2669 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); | |
2670 | if (ret < 0) { | |
2671 | if (ret != -ENOSPC) | |
2672 | mlog_errno(ret); | |
2673 | goto out; | |
2674 | } | |
2675 | ||
2676 | out: | |
2677 | if (ret) { | |
2678 | if (*meta_ac) { | |
2679 | ocfs2_free_alloc_context(*meta_ac); | |
2680 | *meta_ac = NULL; | |
2681 | } | |
2682 | ||
2683 | /* | |
2684 | * We cannot have an error and a non null *data_ac. | |
2685 | */ | |
2686 | } | |
2687 | ||
2688 | return ret; | |
2689 | } | |
6ca497a8 | 2690 | |
2691 | /* | |
2692 | * Read the inode specified by blkno to get suballoc_slot and | |
2693 | * suballoc_bit. | |
2694 | */ | |
2695 | static int ocfs2_get_suballoc_slot_bit(struct ocfs2_super *osb, u64 blkno, | |
889f004a TM |
2696 | u16 *suballoc_slot, u64 *group_blkno, |
2697 | u16 *suballoc_bit) | |
6ca497a8 | 2698 | { |
2699 | int status; | |
2700 | struct buffer_head *inode_bh = NULL; | |
2701 | struct ocfs2_dinode *inode_fe; | |
2702 | ||
2f73e135 | 2703 | trace_ocfs2_get_suballoc_slot_bit((unsigned long long)blkno); |
6ca497a8 | 2704 | |
2705 | /* dirty read disk */ | |
2706 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &inode_bh); | |
2707 | if (status < 0) { | |
5b09b507 JB |
2708 | mlog(ML_ERROR, "read block %llu failed %d\n", |
2709 | (unsigned long long)blkno, status); | |
6ca497a8 | 2710 | goto bail; |
2711 | } | |
2712 | ||
2713 | inode_fe = (struct ocfs2_dinode *) inode_bh->b_data; | |
2714 | if (!OCFS2_IS_VALID_DINODE(inode_fe)) { | |
5b09b507 JB |
2715 | mlog(ML_ERROR, "invalid inode %llu requested\n", |
2716 | (unsigned long long)blkno); | |
6ca497a8 | 2717 | status = -EINVAL; |
2718 | goto bail; | |
2719 | } | |
2720 | ||
0fba8137 | 2721 | if (le16_to_cpu(inode_fe->i_suballoc_slot) != (u16)OCFS2_INVALID_SLOT && |
6ca497a8 | 2722 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot) > osb->max_slots - 1) { |
2723 | mlog(ML_ERROR, "inode %llu has invalid suballoc slot %u\n", | |
5b09b507 JB |
2724 | (unsigned long long)blkno, |
2725 | (u32)le16_to_cpu(inode_fe->i_suballoc_slot)); | |
6ca497a8 | 2726 | status = -EINVAL; |
2727 | goto bail; | |
2728 | } | |
2729 | ||
2730 | if (suballoc_slot) | |
2731 | *suballoc_slot = le16_to_cpu(inode_fe->i_suballoc_slot); | |
2732 | if (suballoc_bit) | |
2733 | *suballoc_bit = le16_to_cpu(inode_fe->i_suballoc_bit); | |
889f004a TM |
2734 | if (group_blkno) |
2735 | *group_blkno = le64_to_cpu(inode_fe->i_suballoc_loc); | |
6ca497a8 | 2736 | |
2737 | bail: | |
2738 | brelse(inode_bh); | |
2739 | ||
c1e8d35e TM |
2740 | if (status) |
2741 | mlog_errno(status); | |
6ca497a8 | 2742 | return status; |
2743 | } | |
2744 | ||
2745 | /* | |
2746 | * test whether bit is SET in allocator bitmap or not. on success, 0 | |
2747 | * is returned and *res is 1 for SET; 0 otherwise. when fails, errno | |
2748 | * is returned and *res is meaningless. Call this after you have | |
2749 | * cluster locked against suballoc, or you may get a result based on | |
2750 | * non-up2date contents | |
2751 | */ | |
2752 | static int ocfs2_test_suballoc_bit(struct ocfs2_super *osb, | |
2753 | struct inode *suballoc, | |
889f004a TM |
2754 | struct buffer_head *alloc_bh, |
2755 | u64 group_blkno, u64 blkno, | |
6ca497a8 | 2756 | u16 bit, int *res) |
2757 | { | |
abf1b3cb | 2758 | struct ocfs2_dinode *alloc_di; |
6ca497a8 | 2759 | struct ocfs2_group_desc *group; |
2760 | struct buffer_head *group_bh = NULL; | |
2761 | u64 bg_blkno; | |
2762 | int status; | |
2763 | ||
2f73e135 TM |
2764 | trace_ocfs2_test_suballoc_bit((unsigned long long)blkno, |
2765 | (unsigned int)bit); | |
6ca497a8 | 2766 | |
abf1b3cb TM |
2767 | alloc_di = (struct ocfs2_dinode *)alloc_bh->b_data; |
2768 | if ((bit + 1) > ocfs2_bits_per_group(&alloc_di->id2.i_chain)) { | |
6ca497a8 | 2769 | mlog(ML_ERROR, "suballoc bit %u out of range of %u\n", |
2770 | (unsigned int)bit, | |
abf1b3cb | 2771 | ocfs2_bits_per_group(&alloc_di->id2.i_chain)); |
6ca497a8 | 2772 | status = -EINVAL; |
2773 | goto bail; | |
2774 | } | |
2775 | ||
889f004a TM |
2776 | bg_blkno = group_blkno ? group_blkno : |
2777 | ocfs2_which_suballoc_group(blkno, bit); | |
abf1b3cb | 2778 | status = ocfs2_read_group_descriptor(suballoc, alloc_di, bg_blkno, |
6ca497a8 | 2779 | &group_bh); |
2780 | if (status < 0) { | |
5b09b507 JB |
2781 | mlog(ML_ERROR, "read group %llu failed %d\n", |
2782 | (unsigned long long)bg_blkno, status); | |
6ca497a8 | 2783 | goto bail; |
2784 | } | |
2785 | ||
2786 | group = (struct ocfs2_group_desc *) group_bh->b_data; | |
2787 | *res = ocfs2_test_bit(bit, (unsigned long *)group->bg_bitmap); | |
2788 | ||
2789 | bail: | |
2790 | brelse(group_bh); | |
2791 | ||
c1e8d35e TM |
2792 | if (status) |
2793 | mlog_errno(status); | |
6ca497a8 | 2794 | return status; |
2795 | } | |
2796 | ||
2797 | /* | |
2798 | * Test if the bit representing this inode (blkno) is set in the | |
2799 | * suballocator. | |
2800 | * | |
2801 | * On success, 0 is returned and *res is 1 for SET; 0 otherwise. | |
2802 | * | |
2803 | * In the event of failure, a negative value is returned and *res is | |
2804 | * meaningless. | |
2805 | * | |
2806 | * Callers must make sure to hold nfs_sync_lock to prevent | |
2807 | * ocfs2_delete_inode() on another node from accessing the same | |
2808 | * suballocator concurrently. | |
2809 | */ | |
2810 | int ocfs2_test_inode_bit(struct ocfs2_super *osb, u64 blkno, int *res) | |
2811 | { | |
2812 | int status; | |
889f004a | 2813 | u64 group_blkno = 0; |
6ca497a8 | 2814 | u16 suballoc_bit = 0, suballoc_slot = 0; |
2815 | struct inode *inode_alloc_inode; | |
2816 | struct buffer_head *alloc_bh = NULL; | |
2817 | ||
2f73e135 | 2818 | trace_ocfs2_test_inode_bit((unsigned long long)blkno); |
6ca497a8 | 2819 | |
2820 | status = ocfs2_get_suballoc_slot_bit(osb, blkno, &suballoc_slot, | |
889f004a | 2821 | &group_blkno, &suballoc_bit); |
6ca497a8 | 2822 | if (status < 0) { |
2823 | mlog(ML_ERROR, "get alloc slot and bit failed %d\n", status); | |
2824 | goto bail; | |
2825 | } | |
2826 | ||
e5a15e17 JB |
2827 | if (suballoc_slot == (u16)OCFS2_INVALID_SLOT) |
2828 | inode_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2829 | GLOBAL_INODE_ALLOC_SYSTEM_INODE, suballoc_slot); | |
2830 | else | |
2831 | inode_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2832 | INODE_ALLOC_SYSTEM_INODE, suballoc_slot); | |
6ca497a8 | 2833 | if (!inode_alloc_inode) { |
2834 | /* the error code could be inaccurate, but we are not able to | |
2835 | * get the correct one. */ | |
2836 | status = -EINVAL; | |
2837 | mlog(ML_ERROR, "unable to get alloc inode in slot %u\n", | |
2838 | (u32)suballoc_slot); | |
2839 | goto bail; | |
2840 | } | |
2841 | ||
5955102c | 2842 | inode_lock(inode_alloc_inode); |
6ca497a8 | 2843 | status = ocfs2_inode_lock(inode_alloc_inode, &alloc_bh, 0); |
2844 | if (status < 0) { | |
5955102c | 2845 | inode_unlock(inode_alloc_inode); |
7dc3e839 | 2846 | iput(inode_alloc_inode); |
6ca497a8 | 2847 | mlog(ML_ERROR, "lock on alloc inode on slot %u failed %d\n", |
2848 | (u32)suballoc_slot, status); | |
2849 | goto bail; | |
2850 | } | |
2851 | ||
2852 | status = ocfs2_test_suballoc_bit(osb, inode_alloc_inode, alloc_bh, | |
889f004a | 2853 | group_blkno, blkno, suballoc_bit, res); |
6ca497a8 | 2854 | if (status < 0) |
2855 | mlog(ML_ERROR, "test suballoc bit failed %d\n", status); | |
2856 | ||
2857 | ocfs2_inode_unlock(inode_alloc_inode, 0); | |
5955102c | 2858 | inode_unlock(inode_alloc_inode); |
6ca497a8 | 2859 | |
2860 | iput(inode_alloc_inode); | |
2861 | brelse(alloc_bh); | |
2862 | bail: | |
c1e8d35e TM |
2863 | if (status) |
2864 | mlog_errno(status); | |
6ca497a8 | 2865 | return status; |
2866 | } |