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