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Commit | Line | Data |
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9e33d69f JK |
1 | /* |
2 | * Implementation of operations over local quota file | |
3 | */ | |
4 | ||
5 | #include <linux/fs.h> | |
6 | #include <linux/quota.h> | |
7 | #include <linux/quotaops.h> | |
8 | #include <linux/module.h> | |
9 | ||
10 | #define MLOG_MASK_PREFIX ML_QUOTA | |
11 | #include <cluster/masklog.h> | |
12 | ||
13 | #include "ocfs2_fs.h" | |
14 | #include "ocfs2.h" | |
15 | #include "inode.h" | |
16 | #include "alloc.h" | |
17 | #include "file.h" | |
18 | #include "buffer_head_io.h" | |
19 | #include "journal.h" | |
20 | #include "sysfile.h" | |
21 | #include "dlmglue.h" | |
22 | #include "quota.h" | |
23 | ||
24 | /* Number of local quota structures per block */ | |
25 | static inline unsigned int ol_quota_entries_per_block(struct super_block *sb) | |
26 | { | |
27 | return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) / | |
28 | sizeof(struct ocfs2_local_disk_dqblk)); | |
29 | } | |
30 | ||
31 | /* Number of blocks with entries in one chunk */ | |
32 | static inline unsigned int ol_chunk_blocks(struct super_block *sb) | |
33 | { | |
34 | return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) - | |
35 | OCFS2_QBLK_RESERVED_SPACE) << 3) / | |
36 | ol_quota_entries_per_block(sb); | |
37 | } | |
38 | ||
39 | /* Number of entries in a chunk bitmap */ | |
40 | static unsigned int ol_chunk_entries(struct super_block *sb) | |
41 | { | |
42 | return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb); | |
43 | } | |
44 | ||
45 | /* Offset of the chunk in quota file */ | |
46 | static unsigned int ol_quota_chunk_block(struct super_block *sb, int c) | |
47 | { | |
48 | /* 1 block for local quota file info, 1 block per chunk for chunk info */ | |
49 | return 1 + (ol_chunk_blocks(sb) + 1) * c; | |
50 | } | |
51 | ||
2205363d JK |
52 | static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off) |
53 | { | |
54 | int epb = ol_quota_entries_per_block(sb); | |
55 | ||
56 | return ol_quota_chunk_block(sb, c) + 1 + off / epb; | |
57 | } | |
58 | ||
59 | static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off) | |
9e33d69f JK |
60 | { |
61 | int epb = ol_quota_entries_per_block(sb); | |
62 | ||
2205363d JK |
63 | return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk); |
64 | } | |
65 | ||
66 | /* Offset of the dquot structure in the quota file */ | |
67 | static loff_t ol_dqblk_off(struct super_block *sb, int c, int off) | |
68 | { | |
69 | return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) + | |
70 | ol_dqblk_block_off(sb, c, off); | |
9e33d69f JK |
71 | } |
72 | ||
73 | /* Compute block number from given offset */ | |
74 | static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off) | |
75 | { | |
76 | return off >> sb->s_blocksize_bits; | |
77 | } | |
78 | ||
79 | static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off) | |
80 | { | |
81 | return off & ((1 << sb->s_blocksize_bits) - 1); | |
82 | } | |
83 | ||
84 | /* Compute offset in the chunk of a structure with the given offset */ | |
85 | static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off) | |
86 | { | |
87 | int epb = ol_quota_entries_per_block(sb); | |
88 | ||
89 | return ((off >> sb->s_blocksize_bits) - | |
90 | ol_quota_chunk_block(sb, c) - 1) * epb | |
91 | + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) / | |
92 | sizeof(struct ocfs2_local_disk_dqblk); | |
93 | } | |
94 | ||
95 | /* Write bufferhead into the fs */ | |
96 | static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh, | |
97 | void (*modify)(struct buffer_head *, void *), void *private) | |
98 | { | |
99 | struct super_block *sb = inode->i_sb; | |
100 | handle_t *handle; | |
101 | int status; | |
102 | ||
103 | handle = ocfs2_start_trans(OCFS2_SB(sb), 1); | |
104 | if (IS_ERR(handle)) { | |
105 | status = PTR_ERR(handle); | |
106 | mlog_errno(status); | |
107 | return status; | |
108 | } | |
13723d00 JB |
109 | status = ocfs2_journal_access_dq(handle, inode, bh, |
110 | OCFS2_JOURNAL_ACCESS_WRITE); | |
9e33d69f JK |
111 | if (status < 0) { |
112 | mlog_errno(status); | |
113 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
114 | return status; | |
115 | } | |
116 | lock_buffer(bh); | |
117 | modify(bh, private); | |
118 | unlock_buffer(bh); | |
119 | status = ocfs2_journal_dirty(handle, bh); | |
120 | if (status < 0) { | |
121 | mlog_errno(status); | |
122 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
123 | return status; | |
124 | } | |
125 | status = ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
126 | if (status < 0) { | |
127 | mlog_errno(status); | |
128 | return status; | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
133 | /* Check whether we understand format of quota files */ | |
134 | static int ocfs2_local_check_quota_file(struct super_block *sb, int type) | |
135 | { | |
136 | unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS; | |
137 | unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS; | |
138 | unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS; | |
139 | unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS; | |
140 | unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, | |
141 | GROUP_QUOTA_SYSTEM_INODE }; | |
85eb8b73 | 142 | struct buffer_head *bh = NULL; |
9e33d69f JK |
143 | struct inode *linode = sb_dqopt(sb)->files[type]; |
144 | struct inode *ginode = NULL; | |
145 | struct ocfs2_disk_dqheader *dqhead; | |
146 | int status, ret = 0; | |
147 | ||
148 | /* First check whether we understand local quota file */ | |
85eb8b73 JB |
149 | status = ocfs2_read_quota_block(linode, 0, &bh); |
150 | if (status) { | |
9e33d69f JK |
151 | mlog_errno(status); |
152 | mlog(ML_ERROR, "failed to read quota file header (type=%d)\n", | |
153 | type); | |
154 | goto out_err; | |
155 | } | |
156 | dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data); | |
157 | if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) { | |
158 | mlog(ML_ERROR, "quota file magic does not match (%u != %u)," | |
159 | " type=%d\n", le32_to_cpu(dqhead->dqh_magic), | |
160 | lmagics[type], type); | |
161 | goto out_err; | |
162 | } | |
163 | if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) { | |
164 | mlog(ML_ERROR, "quota file version does not match (%u != %u)," | |
165 | " type=%d\n", le32_to_cpu(dqhead->dqh_version), | |
166 | lversions[type], type); | |
167 | goto out_err; | |
168 | } | |
169 | brelse(bh); | |
170 | bh = NULL; | |
171 | ||
172 | /* Next check whether we understand global quota file */ | |
173 | ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], | |
174 | OCFS2_INVALID_SLOT); | |
175 | if (!ginode) { | |
176 | mlog(ML_ERROR, "cannot get global quota file inode " | |
177 | "(type=%d)\n", type); | |
178 | goto out_err; | |
179 | } | |
180 | /* Since the header is read only, we don't care about locking */ | |
85eb8b73 JB |
181 | status = ocfs2_read_quota_block(ginode, 0, &bh); |
182 | if (status) { | |
9e33d69f JK |
183 | mlog_errno(status); |
184 | mlog(ML_ERROR, "failed to read global quota file header " | |
185 | "(type=%d)\n", type); | |
186 | goto out_err; | |
187 | } | |
188 | dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data); | |
189 | if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) { | |
190 | mlog(ML_ERROR, "global quota file magic does not match " | |
191 | "(%u != %u), type=%d\n", | |
192 | le32_to_cpu(dqhead->dqh_magic), gmagics[type], type); | |
193 | goto out_err; | |
194 | } | |
195 | if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) { | |
196 | mlog(ML_ERROR, "global quota file version does not match " | |
197 | "(%u != %u), type=%d\n", | |
198 | le32_to_cpu(dqhead->dqh_version), gversions[type], | |
199 | type); | |
200 | goto out_err; | |
201 | } | |
202 | ||
203 | ret = 1; | |
204 | out_err: | |
205 | brelse(bh); | |
206 | iput(ginode); | |
207 | return ret; | |
208 | } | |
209 | ||
210 | /* Release given list of quota file chunks */ | |
211 | static void ocfs2_release_local_quota_bitmaps(struct list_head *head) | |
212 | { | |
213 | struct ocfs2_quota_chunk *pos, *next; | |
214 | ||
215 | list_for_each_entry_safe(pos, next, head, qc_chunk) { | |
216 | list_del(&pos->qc_chunk); | |
217 | brelse(pos->qc_headerbh); | |
218 | kmem_cache_free(ocfs2_qf_chunk_cachep, pos); | |
219 | } | |
220 | } | |
221 | ||
222 | /* Load quota bitmaps into memory */ | |
223 | static int ocfs2_load_local_quota_bitmaps(struct inode *inode, | |
224 | struct ocfs2_local_disk_dqinfo *ldinfo, | |
225 | struct list_head *head) | |
226 | { | |
227 | struct ocfs2_quota_chunk *newchunk; | |
228 | int i, status; | |
229 | ||
230 | INIT_LIST_HEAD(head); | |
231 | for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) { | |
232 | newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS); | |
233 | if (!newchunk) { | |
234 | ocfs2_release_local_quota_bitmaps(head); | |
235 | return -ENOMEM; | |
236 | } | |
237 | newchunk->qc_num = i; | |
85eb8b73 JB |
238 | newchunk->qc_headerbh = NULL; |
239 | status = ocfs2_read_quota_block(inode, | |
9e33d69f | 240 | ol_quota_chunk_block(inode->i_sb, i), |
85eb8b73 JB |
241 | &newchunk->qc_headerbh); |
242 | if (status) { | |
9e33d69f JK |
243 | mlog_errno(status); |
244 | kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk); | |
245 | ocfs2_release_local_quota_bitmaps(head); | |
246 | return status; | |
247 | } | |
248 | list_add_tail(&newchunk->qc_chunk, head); | |
249 | } | |
250 | return 0; | |
251 | } | |
252 | ||
253 | static void olq_update_info(struct buffer_head *bh, void *private) | |
254 | { | |
255 | struct mem_dqinfo *info = private; | |
256 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
257 | struct ocfs2_local_disk_dqinfo *ldinfo; | |
258 | ||
259 | ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + | |
260 | OCFS2_LOCAL_INFO_OFF); | |
261 | spin_lock(&dq_data_lock); | |
262 | ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK); | |
263 | ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks); | |
264 | ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks); | |
265 | spin_unlock(&dq_data_lock); | |
266 | } | |
267 | ||
2205363d JK |
268 | static int ocfs2_add_recovery_chunk(struct super_block *sb, |
269 | struct ocfs2_local_disk_chunk *dchunk, | |
270 | int chunk, | |
271 | struct list_head *head) | |
272 | { | |
273 | struct ocfs2_recovery_chunk *rc; | |
274 | ||
275 | rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS); | |
276 | if (!rc) | |
277 | return -ENOMEM; | |
278 | rc->rc_chunk = chunk; | |
279 | rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS); | |
280 | if (!rc->rc_bitmap) { | |
281 | kfree(rc); | |
282 | return -ENOMEM; | |
283 | } | |
284 | memcpy(rc->rc_bitmap, dchunk->dqc_bitmap, | |
285 | (ol_chunk_entries(sb) + 7) >> 3); | |
286 | list_add_tail(&rc->rc_list, head); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static void free_recovery_list(struct list_head *head) | |
291 | { | |
292 | struct ocfs2_recovery_chunk *next; | |
293 | struct ocfs2_recovery_chunk *rchunk; | |
294 | ||
295 | list_for_each_entry_safe(rchunk, next, head, rc_list) { | |
296 | list_del(&rchunk->rc_list); | |
297 | kfree(rchunk->rc_bitmap); | |
298 | kfree(rchunk); | |
299 | } | |
300 | } | |
301 | ||
302 | void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec) | |
303 | { | |
304 | int type; | |
305 | ||
306 | for (type = 0; type < MAXQUOTAS; type++) | |
307 | free_recovery_list(&(rec->r_list[type])); | |
308 | kfree(rec); | |
309 | } | |
310 | ||
311 | /* Load entries in our quota file we have to recover*/ | |
312 | static int ocfs2_recovery_load_quota(struct inode *lqinode, | |
313 | struct ocfs2_local_disk_dqinfo *ldinfo, | |
314 | int type, | |
315 | struct list_head *head) | |
316 | { | |
317 | struct super_block *sb = lqinode->i_sb; | |
318 | struct buffer_head *hbh; | |
319 | struct ocfs2_local_disk_chunk *dchunk; | |
320 | int i, chunks = le32_to_cpu(ldinfo->dqi_chunks); | |
321 | int status = 0; | |
322 | ||
323 | for (i = 0; i < chunks; i++) { | |
85eb8b73 JB |
324 | hbh = NULL; |
325 | status = ocfs2_read_quota_block(lqinode, | |
326 | ol_quota_chunk_block(sb, i), | |
327 | &hbh); | |
328 | if (status) { | |
2205363d JK |
329 | mlog_errno(status); |
330 | break; | |
331 | } | |
332 | dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data; | |
333 | if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb)) | |
334 | status = ocfs2_add_recovery_chunk(sb, dchunk, i, head); | |
335 | brelse(hbh); | |
336 | if (status < 0) | |
337 | break; | |
338 | } | |
339 | if (status < 0) | |
340 | free_recovery_list(head); | |
341 | return status; | |
342 | } | |
343 | ||
344 | static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void) | |
345 | { | |
346 | int type; | |
347 | struct ocfs2_quota_recovery *rec; | |
348 | ||
349 | rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS); | |
350 | if (!rec) | |
351 | return NULL; | |
352 | for (type = 0; type < MAXQUOTAS; type++) | |
353 | INIT_LIST_HEAD(&(rec->r_list[type])); | |
354 | return rec; | |
355 | } | |
356 | ||
357 | /* Load information we need for quota recovery into memory */ | |
358 | struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery( | |
359 | struct ocfs2_super *osb, | |
360 | int slot_num) | |
361 | { | |
362 | unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, | |
363 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; | |
364 | unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, | |
365 | LOCAL_GROUP_QUOTA_SYSTEM_INODE }; | |
366 | struct super_block *sb = osb->sb; | |
367 | struct ocfs2_local_disk_dqinfo *ldinfo; | |
368 | struct inode *lqinode; | |
369 | struct buffer_head *bh; | |
370 | int type; | |
371 | int status = 0; | |
372 | struct ocfs2_quota_recovery *rec; | |
373 | ||
374 | mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num); | |
375 | rec = ocfs2_alloc_quota_recovery(); | |
376 | if (!rec) | |
377 | return ERR_PTR(-ENOMEM); | |
378 | /* First init... */ | |
379 | ||
380 | for (type = 0; type < MAXQUOTAS; type++) { | |
381 | if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) | |
382 | continue; | |
383 | /* At this point, journal of the slot is already replayed so | |
384 | * we can trust metadata and data of the quota file */ | |
385 | lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num); | |
386 | if (!lqinode) { | |
387 | status = -ENOENT; | |
388 | goto out; | |
389 | } | |
390 | status = ocfs2_inode_lock_full(lqinode, NULL, 1, | |
391 | OCFS2_META_LOCK_RECOVERY); | |
392 | if (status < 0) { | |
393 | mlog_errno(status); | |
394 | goto out_put; | |
395 | } | |
396 | /* Now read local header */ | |
85eb8b73 JB |
397 | bh = NULL; |
398 | status = ocfs2_read_quota_block(lqinode, 0, &bh); | |
399 | if (status) { | |
2205363d JK |
400 | mlog_errno(status); |
401 | mlog(ML_ERROR, "failed to read quota file info header " | |
402 | "(slot=%d type=%d)\n", slot_num, type); | |
403 | goto out_lock; | |
404 | } | |
405 | ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + | |
406 | OCFS2_LOCAL_INFO_OFF); | |
407 | status = ocfs2_recovery_load_quota(lqinode, ldinfo, type, | |
408 | &rec->r_list[type]); | |
409 | brelse(bh); | |
410 | out_lock: | |
411 | ocfs2_inode_unlock(lqinode, 1); | |
412 | out_put: | |
413 | iput(lqinode); | |
414 | if (status < 0) | |
415 | break; | |
416 | } | |
417 | out: | |
418 | if (status < 0) { | |
419 | ocfs2_free_quota_recovery(rec); | |
420 | rec = ERR_PTR(status); | |
421 | } | |
422 | return rec; | |
423 | } | |
424 | ||
425 | /* Sync changes in local quota file into global quota file and | |
426 | * reinitialize local quota file. | |
427 | * The function expects local quota file to be already locked and | |
428 | * dqonoff_mutex locked. */ | |
429 | static int ocfs2_recover_local_quota_file(struct inode *lqinode, | |
430 | int type, | |
431 | struct ocfs2_quota_recovery *rec) | |
432 | { | |
433 | struct super_block *sb = lqinode->i_sb; | |
434 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
435 | struct ocfs2_local_disk_chunk *dchunk; | |
436 | struct ocfs2_local_disk_dqblk *dqblk; | |
437 | struct dquot *dquot; | |
438 | handle_t *handle; | |
439 | struct buffer_head *hbh = NULL, *qbh = NULL; | |
440 | int status = 0; | |
441 | int bit, chunk; | |
442 | struct ocfs2_recovery_chunk *rchunk, *next; | |
443 | qsize_t spacechange, inodechange; | |
444 | ||
445 | mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type); | |
446 | ||
2205363d JK |
447 | list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) { |
448 | chunk = rchunk->rc_chunk; | |
85eb8b73 JB |
449 | hbh = NULL; |
450 | status = ocfs2_read_quota_block(lqinode, | |
451 | ol_quota_chunk_block(sb, chunk), | |
452 | &hbh); | |
453 | if (status) { | |
2205363d JK |
454 | mlog_errno(status); |
455 | break; | |
456 | } | |
457 | dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data; | |
458 | for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) { | |
85eb8b73 JB |
459 | qbh = NULL; |
460 | status = ocfs2_read_quota_block(lqinode, | |
2205363d | 461 | ol_dqblk_block(sb, chunk, bit), |
85eb8b73 JB |
462 | &qbh); |
463 | if (status) { | |
2205363d JK |
464 | mlog_errno(status); |
465 | break; | |
466 | } | |
467 | dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data + | |
468 | ol_dqblk_block_off(sb, chunk, bit)); | |
469 | dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type); | |
470 | if (!dquot) { | |
471 | status = -EIO; | |
472 | mlog(ML_ERROR, "Failed to get quota structure " | |
473 | "for id %u, type %d. Cannot finish quota " | |
474 | "file recovery.\n", | |
475 | (unsigned)le64_to_cpu(dqblk->dqb_id), | |
476 | type); | |
477 | goto out_put_bh; | |
478 | } | |
80d73f15 JK |
479 | status = ocfs2_lock_global_qf(oinfo, 1); |
480 | if (status < 0) { | |
481 | mlog_errno(status); | |
482 | goto out_put_dquot; | |
483 | } | |
484 | ||
2205363d JK |
485 | handle = ocfs2_start_trans(OCFS2_SB(sb), |
486 | OCFS2_QSYNC_CREDITS); | |
487 | if (IS_ERR(handle)) { | |
488 | status = PTR_ERR(handle); | |
489 | mlog_errno(status); | |
80d73f15 | 490 | goto out_drop_lock; |
2205363d JK |
491 | } |
492 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); | |
493 | spin_lock(&dq_data_lock); | |
494 | /* Add usage from quota entry into quota changes | |
495 | * of our node. Auxiliary variables are important | |
496 | * due to signedness */ | |
497 | spacechange = le64_to_cpu(dqblk->dqb_spacemod); | |
498 | inodechange = le64_to_cpu(dqblk->dqb_inodemod); | |
499 | dquot->dq_dqb.dqb_curspace += spacechange; | |
500 | dquot->dq_dqb.dqb_curinodes += inodechange; | |
501 | spin_unlock(&dq_data_lock); | |
502 | /* We want to drop reference held by the crashed | |
503 | * node. Since we have our own reference we know | |
504 | * global structure actually won't be freed. */ | |
505 | status = ocfs2_global_release_dquot(dquot); | |
506 | if (status < 0) { | |
507 | mlog_errno(status); | |
508 | goto out_commit; | |
509 | } | |
510 | /* Release local quota file entry */ | |
13723d00 | 511 | status = ocfs2_journal_access_dq(handle, lqinode, |
2205363d JK |
512 | qbh, OCFS2_JOURNAL_ACCESS_WRITE); |
513 | if (status < 0) { | |
514 | mlog_errno(status); | |
515 | goto out_commit; | |
516 | } | |
517 | lock_buffer(qbh); | |
518 | WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap)); | |
519 | ocfs2_clear_bit(bit, dchunk->dqc_bitmap); | |
520 | le32_add_cpu(&dchunk->dqc_free, 1); | |
521 | unlock_buffer(qbh); | |
522 | status = ocfs2_journal_dirty(handle, qbh); | |
523 | if (status < 0) | |
524 | mlog_errno(status); | |
525 | out_commit: | |
526 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
527 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
80d73f15 JK |
528 | out_drop_lock: |
529 | ocfs2_unlock_global_qf(oinfo, 1); | |
2205363d JK |
530 | out_put_dquot: |
531 | dqput(dquot); | |
532 | out_put_bh: | |
533 | brelse(qbh); | |
534 | if (status < 0) | |
535 | break; | |
536 | } | |
537 | brelse(hbh); | |
538 | list_del(&rchunk->rc_list); | |
539 | kfree(rchunk->rc_bitmap); | |
540 | kfree(rchunk); | |
541 | if (status < 0) | |
542 | break; | |
543 | } | |
2205363d JK |
544 | if (status < 0) |
545 | free_recovery_list(&(rec->r_list[type])); | |
546 | mlog_exit(status); | |
547 | return status; | |
548 | } | |
549 | ||
550 | /* Recover local quota files for given node different from us */ | |
551 | int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, | |
552 | struct ocfs2_quota_recovery *rec, | |
553 | int slot_num) | |
554 | { | |
555 | unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, | |
556 | LOCAL_GROUP_QUOTA_SYSTEM_INODE }; | |
557 | struct super_block *sb = osb->sb; | |
558 | struct ocfs2_local_disk_dqinfo *ldinfo; | |
559 | struct buffer_head *bh; | |
560 | handle_t *handle; | |
561 | int type; | |
562 | int status = 0; | |
563 | struct inode *lqinode; | |
564 | unsigned int flags; | |
565 | ||
566 | mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num); | |
567 | mutex_lock(&sb_dqopt(sb)->dqonoff_mutex); | |
568 | for (type = 0; type < MAXQUOTAS; type++) { | |
569 | if (list_empty(&(rec->r_list[type]))) | |
570 | continue; | |
571 | mlog(0, "Recovering quota in slot %d\n", slot_num); | |
572 | lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num); | |
573 | if (!lqinode) { | |
574 | status = -ENOENT; | |
575 | goto out; | |
576 | } | |
577 | status = ocfs2_inode_lock_full(lqinode, NULL, 1, | |
578 | OCFS2_META_LOCK_NOQUEUE); | |
579 | /* Someone else is holding the lock? Then he must be | |
580 | * doing the recovery. Just skip the file... */ | |
581 | if (status == -EAGAIN) { | |
582 | mlog(ML_NOTICE, "skipping quota recovery for slot %d " | |
583 | "because quota file is locked.\n", slot_num); | |
584 | status = 0; | |
585 | goto out_put; | |
586 | } else if (status < 0) { | |
587 | mlog_errno(status); | |
588 | goto out_put; | |
589 | } | |
590 | /* Now read local header */ | |
85eb8b73 JB |
591 | bh = NULL; |
592 | status = ocfs2_read_quota_block(lqinode, 0, &bh); | |
593 | if (status) { | |
2205363d JK |
594 | mlog_errno(status); |
595 | mlog(ML_ERROR, "failed to read quota file info header " | |
596 | "(slot=%d type=%d)\n", slot_num, type); | |
597 | goto out_lock; | |
598 | } | |
599 | ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + | |
600 | OCFS2_LOCAL_INFO_OFF); | |
601 | /* Is recovery still needed? */ | |
602 | flags = le32_to_cpu(ldinfo->dqi_flags); | |
603 | if (!(flags & OLQF_CLEAN)) | |
604 | status = ocfs2_recover_local_quota_file(lqinode, | |
605 | type, | |
606 | rec); | |
607 | /* We don't want to mark file as clean when it is actually | |
608 | * active */ | |
609 | if (slot_num == osb->slot_num) | |
610 | goto out_bh; | |
611 | /* Mark quota file as clean if we are recovering quota file of | |
612 | * some other node. */ | |
613 | handle = ocfs2_start_trans(osb, 1); | |
614 | if (IS_ERR(handle)) { | |
615 | status = PTR_ERR(handle); | |
616 | mlog_errno(status); | |
617 | goto out_bh; | |
618 | } | |
13723d00 JB |
619 | status = ocfs2_journal_access_dq(handle, lqinode, bh, |
620 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2205363d JK |
621 | if (status < 0) { |
622 | mlog_errno(status); | |
623 | goto out_trans; | |
624 | } | |
625 | lock_buffer(bh); | |
626 | ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN); | |
627 | unlock_buffer(bh); | |
628 | status = ocfs2_journal_dirty(handle, bh); | |
629 | if (status < 0) | |
630 | mlog_errno(status); | |
631 | out_trans: | |
632 | ocfs2_commit_trans(osb, handle); | |
633 | out_bh: | |
634 | brelse(bh); | |
635 | out_lock: | |
636 | ocfs2_inode_unlock(lqinode, 1); | |
637 | out_put: | |
638 | iput(lqinode); | |
639 | if (status < 0) | |
640 | break; | |
641 | } | |
642 | out: | |
643 | mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); | |
644 | kfree(rec); | |
645 | return status; | |
646 | } | |
647 | ||
9e33d69f JK |
648 | /* Read information header from quota file */ |
649 | static int ocfs2_local_read_info(struct super_block *sb, int type) | |
650 | { | |
651 | struct ocfs2_local_disk_dqinfo *ldinfo; | |
652 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
653 | struct ocfs2_mem_dqinfo *oinfo; | |
654 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
655 | int status; | |
656 | struct buffer_head *bh = NULL; | |
2205363d | 657 | struct ocfs2_quota_recovery *rec; |
9e33d69f JK |
658 | int locked = 0; |
659 | ||
b4c30de3 JK |
660 | /* We don't need the lock and we have to acquire quota file locks |
661 | * which will later depend on this lock */ | |
662 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
9e33d69f JK |
663 | info->dqi_maxblimit = 0x7fffffffffffffffLL; |
664 | info->dqi_maxilimit = 0x7fffffffffffffffLL; | |
665 | oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS); | |
666 | if (!oinfo) { | |
667 | mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota" | |
668 | " info."); | |
669 | goto out_err; | |
670 | } | |
671 | info->dqi_priv = oinfo; | |
672 | oinfo->dqi_type = type; | |
673 | INIT_LIST_HEAD(&oinfo->dqi_chunk); | |
2205363d | 674 | oinfo->dqi_rec = NULL; |
9e33d69f JK |
675 | oinfo->dqi_lqi_bh = NULL; |
676 | oinfo->dqi_ibh = NULL; | |
677 | ||
678 | status = ocfs2_global_read_info(sb, type); | |
679 | if (status < 0) | |
680 | goto out_err; | |
681 | ||
682 | status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1); | |
683 | if (status < 0) { | |
684 | mlog_errno(status); | |
685 | goto out_err; | |
686 | } | |
687 | locked = 1; | |
688 | ||
689 | /* Now read local header */ | |
85eb8b73 JB |
690 | status = ocfs2_read_quota_block(lqinode, 0, &bh); |
691 | if (status) { | |
9e33d69f JK |
692 | mlog_errno(status); |
693 | mlog(ML_ERROR, "failed to read quota file info header " | |
694 | "(type=%d)\n", type); | |
695 | goto out_err; | |
696 | } | |
697 | ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + | |
698 | OCFS2_LOCAL_INFO_OFF); | |
699 | info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags); | |
700 | oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks); | |
701 | oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks); | |
702 | oinfo->dqi_ibh = bh; | |
703 | ||
704 | /* We crashed when using local quota file? */ | |
2205363d JK |
705 | if (!(info->dqi_flags & OLQF_CLEAN)) { |
706 | rec = OCFS2_SB(sb)->quota_rec; | |
707 | if (!rec) { | |
708 | rec = ocfs2_alloc_quota_recovery(); | |
709 | if (!rec) { | |
710 | status = -ENOMEM; | |
711 | mlog_errno(status); | |
712 | goto out_err; | |
713 | } | |
714 | OCFS2_SB(sb)->quota_rec = rec; | |
715 | } | |
9e33d69f | 716 | |
2205363d JK |
717 | status = ocfs2_recovery_load_quota(lqinode, ldinfo, type, |
718 | &rec->r_list[type]); | |
719 | if (status < 0) { | |
720 | mlog_errno(status); | |
721 | goto out_err; | |
722 | } | |
723 | } | |
724 | ||
725 | status = ocfs2_load_local_quota_bitmaps(lqinode, | |
9e33d69f JK |
726 | ldinfo, |
727 | &oinfo->dqi_chunk); | |
728 | if (status < 0) { | |
729 | mlog_errno(status); | |
730 | goto out_err; | |
731 | } | |
732 | ||
733 | /* Now mark quota file as used */ | |
734 | info->dqi_flags &= ~OLQF_CLEAN; | |
735 | status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info); | |
736 | if (status < 0) { | |
737 | mlog_errno(status); | |
738 | goto out_err; | |
739 | } | |
740 | ||
b4c30de3 | 741 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
742 | return 0; |
743 | out_err: | |
744 | if (oinfo) { | |
745 | iput(oinfo->dqi_gqinode); | |
746 | ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); | |
747 | ocfs2_lock_res_free(&oinfo->dqi_gqlock); | |
748 | brelse(oinfo->dqi_lqi_bh); | |
749 | if (locked) | |
750 | ocfs2_inode_unlock(lqinode, 1); | |
751 | ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk); | |
752 | kfree(oinfo); | |
753 | } | |
754 | brelse(bh); | |
b4c30de3 | 755 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
756 | return -1; |
757 | } | |
758 | ||
759 | /* Write local info to quota file */ | |
760 | static int ocfs2_local_write_info(struct super_block *sb, int type) | |
761 | { | |
762 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
763 | struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv) | |
764 | ->dqi_ibh; | |
765 | int status; | |
766 | ||
767 | status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info, | |
768 | info); | |
769 | if (status < 0) { | |
770 | mlog_errno(status); | |
771 | return -1; | |
772 | } | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
777 | /* Release info from memory */ | |
778 | static int ocfs2_local_free_info(struct super_block *sb, int type) | |
779 | { | |
780 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
781 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
782 | struct ocfs2_quota_chunk *chunk; | |
783 | struct ocfs2_local_disk_chunk *dchunk; | |
784 | int mark_clean = 1, len; | |
785 | int status; | |
786 | ||
171bf93c MF |
787 | /* At this point we know there are no more dquots and thus |
788 | * even if there's some sync in the pdflush queue, it won't | |
789 | * find any dquots and return without doing anything */ | |
790 | cancel_delayed_work_sync(&oinfo->dqi_sync_work); | |
9e33d69f JK |
791 | iput(oinfo->dqi_gqinode); |
792 | ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); | |
793 | ocfs2_lock_res_free(&oinfo->dqi_gqlock); | |
794 | list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) { | |
795 | dchunk = (struct ocfs2_local_disk_chunk *) | |
796 | (chunk->qc_headerbh->b_data); | |
797 | if (chunk->qc_num < oinfo->dqi_chunks - 1) { | |
798 | len = ol_chunk_entries(sb); | |
799 | } else { | |
800 | len = (oinfo->dqi_blocks - | |
801 | ol_quota_chunk_block(sb, chunk->qc_num) - 1) | |
802 | * ol_quota_entries_per_block(sb); | |
803 | } | |
804 | /* Not all entries free? Bug! */ | |
805 | if (le32_to_cpu(dchunk->dqc_free) != len) { | |
806 | mlog(ML_ERROR, "releasing quota file with used " | |
807 | "entries (type=%d)\n", type); | |
808 | mark_clean = 0; | |
809 | } | |
810 | } | |
811 | ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk); | |
812 | ||
2205363d JK |
813 | /* dqonoff_mutex protects us against racing with recovery thread... */ |
814 | if (oinfo->dqi_rec) { | |
815 | ocfs2_free_quota_recovery(oinfo->dqi_rec); | |
816 | mark_clean = 0; | |
817 | } | |
818 | ||
9e33d69f JK |
819 | if (!mark_clean) |
820 | goto out; | |
821 | ||
822 | /* Mark local file as clean */ | |
823 | info->dqi_flags |= OLQF_CLEAN; | |
824 | status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], | |
825 | oinfo->dqi_ibh, | |
826 | olq_update_info, | |
827 | info); | |
828 | if (status < 0) { | |
829 | mlog_errno(status); | |
830 | goto out; | |
831 | } | |
832 | ||
833 | out: | |
834 | ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1); | |
835 | brelse(oinfo->dqi_ibh); | |
836 | brelse(oinfo->dqi_lqi_bh); | |
837 | kfree(oinfo); | |
838 | return 0; | |
839 | } | |
840 | ||
841 | static void olq_set_dquot(struct buffer_head *bh, void *private) | |
842 | { | |
843 | struct ocfs2_dquot *od = private; | |
844 | struct ocfs2_local_disk_dqblk *dqblk; | |
845 | struct super_block *sb = od->dq_dquot.dq_sb; | |
846 | ||
847 | dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data | |
848 | + ol_dqblk_block_offset(sb, od->dq_local_off)); | |
849 | ||
850 | dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id); | |
851 | spin_lock(&dq_data_lock); | |
852 | dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace - | |
853 | od->dq_origspace); | |
854 | dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes - | |
855 | od->dq_originodes); | |
856 | spin_unlock(&dq_data_lock); | |
857 | mlog(0, "Writing local dquot %u space %lld inodes %lld\n", | |
9a2f3866 JK |
858 | od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod), |
859 | (long long)le64_to_cpu(dqblk->dqb_inodemod)); | |
9e33d69f JK |
860 | } |
861 | ||
862 | /* Write dquot to local quota file */ | |
863 | static int ocfs2_local_write_dquot(struct dquot *dquot) | |
864 | { | |
865 | struct super_block *sb = dquot->dq_sb; | |
866 | struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); | |
85eb8b73 | 867 | struct buffer_head *bh = NULL; |
9e33d69f JK |
868 | int status; |
869 | ||
85eb8b73 | 870 | status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type], |
9e33d69f | 871 | ol_dqblk_file_block(sb, od->dq_local_off), |
85eb8b73 JB |
872 | &bh); |
873 | if (status) { | |
9e33d69f JK |
874 | mlog_errno(status); |
875 | goto out; | |
876 | } | |
877 | status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh, | |
878 | olq_set_dquot, od); | |
879 | if (status < 0) { | |
880 | mlog_errno(status); | |
881 | goto out; | |
882 | } | |
883 | out: | |
884 | brelse(bh); | |
885 | return status; | |
886 | } | |
887 | ||
888 | /* Find free entry in local quota file */ | |
889 | static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb, | |
890 | int type, | |
891 | int *offset) | |
892 | { | |
893 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
894 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
895 | struct ocfs2_quota_chunk *chunk; | |
896 | struct ocfs2_local_disk_chunk *dchunk; | |
897 | int found = 0, len; | |
898 | ||
899 | list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) { | |
900 | dchunk = (struct ocfs2_local_disk_chunk *) | |
901 | chunk->qc_headerbh->b_data; | |
902 | if (le32_to_cpu(dchunk->dqc_free) > 0) { | |
903 | found = 1; | |
904 | break; | |
905 | } | |
906 | } | |
907 | if (!found) | |
908 | return NULL; | |
909 | ||
910 | if (chunk->qc_num < oinfo->dqi_chunks - 1) { | |
911 | len = ol_chunk_entries(sb); | |
912 | } else { | |
913 | len = (oinfo->dqi_blocks - | |
914 | ol_quota_chunk_block(sb, chunk->qc_num) - 1) | |
915 | * ol_quota_entries_per_block(sb); | |
916 | } | |
917 | ||
918 | found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0); | |
919 | /* We failed? */ | |
920 | if (found == len) { | |
921 | mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u" | |
922 | " entries free (type=%d)\n", chunk->qc_num, | |
923 | le32_to_cpu(dchunk->dqc_free), type); | |
924 | return ERR_PTR(-EIO); | |
925 | } | |
926 | *offset = found; | |
927 | return chunk; | |
928 | } | |
929 | ||
930 | /* Add new chunk to the local quota file */ | |
931 | static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk( | |
932 | struct super_block *sb, | |
933 | int type, | |
934 | int *offset) | |
935 | { | |
936 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
937 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
938 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
939 | struct ocfs2_quota_chunk *chunk = NULL; | |
940 | struct ocfs2_local_disk_chunk *dchunk; | |
941 | int status; | |
942 | handle_t *handle; | |
943 | struct buffer_head *bh = NULL; | |
944 | u64 p_blkno; | |
945 | ||
946 | /* We are protected by dqio_sem so no locking needed */ | |
947 | status = ocfs2_extend_no_holes(lqinode, | |
948 | lqinode->i_size + 2 * sb->s_blocksize, | |
949 | lqinode->i_size); | |
950 | if (status < 0) { | |
951 | mlog_errno(status); | |
952 | goto out; | |
953 | } | |
954 | status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh, | |
955 | lqinode->i_size + 2 * sb->s_blocksize); | |
956 | if (status < 0) { | |
957 | mlog_errno(status); | |
958 | goto out; | |
959 | } | |
960 | ||
961 | chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS); | |
962 | if (!chunk) { | |
963 | status = -ENOMEM; | |
964 | mlog_errno(status); | |
965 | goto out; | |
966 | } | |
967 | ||
968 | down_read(&OCFS2_I(lqinode)->ip_alloc_sem); | |
969 | status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks, | |
970 | &p_blkno, NULL, NULL); | |
971 | up_read(&OCFS2_I(lqinode)->ip_alloc_sem); | |
972 | if (status < 0) { | |
973 | mlog_errno(status); | |
974 | goto out; | |
975 | } | |
976 | bh = sb_getblk(sb, p_blkno); | |
977 | if (!bh) { | |
978 | status = -ENOMEM; | |
979 | mlog_errno(status); | |
980 | goto out; | |
981 | } | |
982 | dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data; | |
983 | ||
984 | handle = ocfs2_start_trans(OCFS2_SB(sb), 2); | |
985 | if (IS_ERR(handle)) { | |
986 | status = PTR_ERR(handle); | |
987 | mlog_errno(status); | |
988 | goto out; | |
989 | } | |
990 | ||
13723d00 JB |
991 | status = ocfs2_journal_access_dq(handle, lqinode, bh, |
992 | OCFS2_JOURNAL_ACCESS_WRITE); | |
9e33d69f JK |
993 | if (status < 0) { |
994 | mlog_errno(status); | |
995 | goto out_trans; | |
996 | } | |
997 | lock_buffer(bh); | |
df32b334 | 998 | dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb)); |
9e33d69f JK |
999 | memset(dchunk->dqc_bitmap, 0, |
1000 | sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) - | |
1001 | OCFS2_QBLK_RESERVED_SPACE); | |
1002 | set_buffer_uptodate(bh); | |
1003 | unlock_buffer(bh); | |
1004 | status = ocfs2_journal_dirty(handle, bh); | |
1005 | if (status < 0) { | |
1006 | mlog_errno(status); | |
1007 | goto out_trans; | |
1008 | } | |
1009 | ||
1010 | oinfo->dqi_blocks += 2; | |
1011 | oinfo->dqi_chunks++; | |
1012 | status = ocfs2_local_write_info(sb, type); | |
1013 | if (status < 0) { | |
1014 | mlog_errno(status); | |
1015 | goto out_trans; | |
1016 | } | |
1017 | status = ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1018 | if (status < 0) { | |
1019 | mlog_errno(status); | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk); | |
1024 | chunk->qc_num = list_entry(chunk->qc_chunk.prev, | |
1025 | struct ocfs2_quota_chunk, | |
1026 | qc_chunk)->qc_num + 1; | |
1027 | chunk->qc_headerbh = bh; | |
1028 | *offset = 0; | |
1029 | return chunk; | |
1030 | out_trans: | |
1031 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1032 | out: | |
1033 | brelse(bh); | |
1034 | kmem_cache_free(ocfs2_qf_chunk_cachep, chunk); | |
1035 | return ERR_PTR(status); | |
1036 | } | |
1037 | ||
1038 | /* Find free entry in local quota file */ | |
1039 | static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file( | |
1040 | struct super_block *sb, | |
1041 | int type, | |
1042 | int *offset) | |
1043 | { | |
1044 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
1045 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
1046 | struct ocfs2_quota_chunk *chunk; | |
1047 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
1048 | struct ocfs2_local_disk_chunk *dchunk; | |
1049 | int epb = ol_quota_entries_per_block(sb); | |
1050 | unsigned int chunk_blocks; | |
1051 | int status; | |
1052 | handle_t *handle; | |
1053 | ||
1054 | if (list_empty(&oinfo->dqi_chunk)) | |
1055 | return ocfs2_local_quota_add_chunk(sb, type, offset); | |
1056 | /* Is the last chunk full? */ | |
1057 | chunk = list_entry(oinfo->dqi_chunk.prev, | |
1058 | struct ocfs2_quota_chunk, qc_chunk); | |
1059 | chunk_blocks = oinfo->dqi_blocks - | |
1060 | ol_quota_chunk_block(sb, chunk->qc_num) - 1; | |
1061 | if (ol_chunk_blocks(sb) == chunk_blocks) | |
1062 | return ocfs2_local_quota_add_chunk(sb, type, offset); | |
1063 | ||
1064 | /* We are protected by dqio_sem so no locking needed */ | |
1065 | status = ocfs2_extend_no_holes(lqinode, | |
1066 | lqinode->i_size + sb->s_blocksize, | |
1067 | lqinode->i_size); | |
1068 | if (status < 0) { | |
1069 | mlog_errno(status); | |
1070 | goto out; | |
1071 | } | |
1072 | status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh, | |
1073 | lqinode->i_size + sb->s_blocksize); | |
1074 | if (status < 0) { | |
1075 | mlog_errno(status); | |
1076 | goto out; | |
1077 | } | |
1078 | handle = ocfs2_start_trans(OCFS2_SB(sb), 2); | |
1079 | if (IS_ERR(handle)) { | |
1080 | status = PTR_ERR(handle); | |
1081 | mlog_errno(status); | |
1082 | goto out; | |
1083 | } | |
13723d00 | 1084 | status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh, |
9e33d69f JK |
1085 | OCFS2_JOURNAL_ACCESS_WRITE); |
1086 | if (status < 0) { | |
1087 | mlog_errno(status); | |
1088 | goto out_trans; | |
1089 | } | |
1090 | ||
1091 | dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data; | |
1092 | lock_buffer(chunk->qc_headerbh); | |
1093 | le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb)); | |
1094 | unlock_buffer(chunk->qc_headerbh); | |
1095 | status = ocfs2_journal_dirty(handle, chunk->qc_headerbh); | |
1096 | if (status < 0) { | |
1097 | mlog_errno(status); | |
1098 | goto out_trans; | |
1099 | } | |
1100 | oinfo->dqi_blocks++; | |
1101 | status = ocfs2_local_write_info(sb, type); | |
1102 | if (status < 0) { | |
1103 | mlog_errno(status); | |
1104 | goto out_trans; | |
1105 | } | |
1106 | ||
1107 | status = ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1108 | if (status < 0) { | |
1109 | mlog_errno(status); | |
1110 | goto out; | |
1111 | } | |
1112 | *offset = chunk_blocks * epb; | |
1113 | return chunk; | |
1114 | out_trans: | |
1115 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1116 | out: | |
1117 | return ERR_PTR(status); | |
1118 | } | |
1119 | ||
df32b334 | 1120 | static void olq_alloc_dquot(struct buffer_head *bh, void *private) |
9e33d69f JK |
1121 | { |
1122 | int *offset = private; | |
1123 | struct ocfs2_local_disk_chunk *dchunk; | |
1124 | ||
1125 | dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data; | |
1126 | ocfs2_set_bit(*offset, dchunk->dqc_bitmap); | |
1127 | le32_add_cpu(&dchunk->dqc_free, -1); | |
1128 | } | |
1129 | ||
1130 | /* Create dquot in the local file for given id */ | |
1131 | static int ocfs2_create_local_dquot(struct dquot *dquot) | |
1132 | { | |
1133 | struct super_block *sb = dquot->dq_sb; | |
1134 | int type = dquot->dq_type; | |
1135 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
1136 | struct ocfs2_quota_chunk *chunk; | |
1137 | struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); | |
1138 | int offset; | |
1139 | int status; | |
1140 | ||
1141 | chunk = ocfs2_find_free_entry(sb, type, &offset); | |
1142 | if (!chunk) { | |
1143 | chunk = ocfs2_extend_local_quota_file(sb, type, &offset); | |
1144 | if (IS_ERR(chunk)) | |
1145 | return PTR_ERR(chunk); | |
1146 | } else if (IS_ERR(chunk)) { | |
1147 | return PTR_ERR(chunk); | |
1148 | } | |
1149 | od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset); | |
1150 | od->dq_chunk = chunk; | |
1151 | ||
1152 | /* Initialize dquot structure on disk */ | |
1153 | status = ocfs2_local_write_dquot(dquot); | |
1154 | if (status < 0) { | |
1155 | mlog_errno(status); | |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | /* Mark structure as allocated */ | |
1160 | status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot, | |
1161 | &offset); | |
1162 | if (status < 0) { | |
1163 | mlog_errno(status); | |
1164 | goto out; | |
1165 | } | |
1166 | out: | |
1167 | return status; | |
1168 | } | |
1169 | ||
1170 | /* Create entry in local file for dquot, load data from the global file */ | |
1171 | static int ocfs2_local_read_dquot(struct dquot *dquot) | |
1172 | { | |
1173 | int status; | |
1174 | ||
1175 | mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type); | |
1176 | ||
1177 | status = ocfs2_global_read_dquot(dquot); | |
1178 | if (status < 0) { | |
1179 | mlog_errno(status); | |
1180 | goto out_err; | |
1181 | } | |
1182 | ||
1183 | /* Now create entry in the local quota file */ | |
1184 | status = ocfs2_create_local_dquot(dquot); | |
1185 | if (status < 0) { | |
1186 | mlog_errno(status); | |
1187 | goto out_err; | |
1188 | } | |
1189 | mlog_exit(0); | |
1190 | return 0; | |
1191 | out_err: | |
1192 | mlog_exit(status); | |
1193 | return status; | |
1194 | } | |
1195 | ||
1196 | /* Release dquot structure from local quota file. ocfs2_release_dquot() has | |
1197 | * already started a transaction and obtained exclusive lock for global | |
1198 | * quota file. */ | |
1199 | static int ocfs2_local_release_dquot(struct dquot *dquot) | |
1200 | { | |
1201 | int status; | |
1202 | int type = dquot->dq_type; | |
1203 | struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); | |
1204 | struct super_block *sb = dquot->dq_sb; | |
1205 | struct ocfs2_local_disk_chunk *dchunk; | |
1206 | int offset; | |
1207 | handle_t *handle = journal_current_handle(); | |
1208 | ||
1209 | BUG_ON(!handle); | |
1210 | /* First write all local changes to global file */ | |
1211 | status = ocfs2_global_release_dquot(dquot); | |
1212 | if (status < 0) { | |
1213 | mlog_errno(status); | |
1214 | goto out; | |
1215 | } | |
1216 | ||
13723d00 | 1217 | status = ocfs2_journal_access_dq(handle, sb_dqopt(sb)->files[type], |
9e33d69f JK |
1218 | od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE); |
1219 | if (status < 0) { | |
1220 | mlog_errno(status); | |
1221 | goto out; | |
1222 | } | |
1223 | offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num, | |
1224 | od->dq_local_off); | |
1225 | dchunk = (struct ocfs2_local_disk_chunk *) | |
1226 | (od->dq_chunk->qc_headerbh->b_data); | |
1227 | /* Mark structure as freed */ | |
1228 | lock_buffer(od->dq_chunk->qc_headerbh); | |
1229 | ocfs2_clear_bit(offset, dchunk->dqc_bitmap); | |
1230 | le32_add_cpu(&dchunk->dqc_free, 1); | |
1231 | unlock_buffer(od->dq_chunk->qc_headerbh); | |
1232 | status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh); | |
1233 | if (status < 0) { | |
1234 | mlog_errno(status); | |
1235 | goto out; | |
1236 | } | |
1237 | status = 0; | |
1238 | out: | |
1239 | /* Clear the read bit so that next time someone uses this | |
1240 | * dquot he reads fresh info from disk and allocates local | |
1241 | * dquot structure */ | |
1242 | clear_bit(DQ_READ_B, &dquot->dq_flags); | |
1243 | return status; | |
1244 | } | |
1245 | ||
1246 | static struct quota_format_ops ocfs2_format_ops = { | |
1247 | .check_quota_file = ocfs2_local_check_quota_file, | |
1248 | .read_file_info = ocfs2_local_read_info, | |
1249 | .write_file_info = ocfs2_global_write_info, | |
1250 | .free_file_info = ocfs2_local_free_info, | |
1251 | .read_dqblk = ocfs2_local_read_dquot, | |
1252 | .commit_dqblk = ocfs2_local_write_dquot, | |
1253 | .release_dqblk = ocfs2_local_release_dquot, | |
1254 | }; | |
1255 | ||
1256 | struct quota_format_type ocfs2_quota_format = { | |
1257 | .qf_fmt_id = QFMT_OCFS2, | |
1258 | .qf_ops = &ocfs2_format_ops, | |
1259 | .qf_owner = THIS_MODULE | |
1260 | }; |