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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 | ||
447 | status = ocfs2_lock_global_qf(oinfo, 1); | |
448 | if (status < 0) | |
449 | goto out; | |
450 | ||
451 | list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) { | |
452 | chunk = rchunk->rc_chunk; | |
85eb8b73 JB |
453 | hbh = NULL; |
454 | status = ocfs2_read_quota_block(lqinode, | |
455 | ol_quota_chunk_block(sb, chunk), | |
456 | &hbh); | |
457 | if (status) { | |
2205363d JK |
458 | mlog_errno(status); |
459 | break; | |
460 | } | |
461 | dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data; | |
462 | for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) { | |
85eb8b73 JB |
463 | qbh = NULL; |
464 | status = ocfs2_read_quota_block(lqinode, | |
2205363d | 465 | ol_dqblk_block(sb, chunk, bit), |
85eb8b73 JB |
466 | &qbh); |
467 | if (status) { | |
2205363d JK |
468 | mlog_errno(status); |
469 | break; | |
470 | } | |
471 | dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data + | |
472 | ol_dqblk_block_off(sb, chunk, bit)); | |
473 | dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type); | |
474 | if (!dquot) { | |
475 | status = -EIO; | |
476 | mlog(ML_ERROR, "Failed to get quota structure " | |
477 | "for id %u, type %d. Cannot finish quota " | |
478 | "file recovery.\n", | |
479 | (unsigned)le64_to_cpu(dqblk->dqb_id), | |
480 | type); | |
481 | goto out_put_bh; | |
482 | } | |
483 | handle = ocfs2_start_trans(OCFS2_SB(sb), | |
484 | OCFS2_QSYNC_CREDITS); | |
485 | if (IS_ERR(handle)) { | |
486 | status = PTR_ERR(handle); | |
487 | mlog_errno(status); | |
488 | goto out_put_dquot; | |
489 | } | |
490 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); | |
491 | spin_lock(&dq_data_lock); | |
492 | /* Add usage from quota entry into quota changes | |
493 | * of our node. Auxiliary variables are important | |
494 | * due to signedness */ | |
495 | spacechange = le64_to_cpu(dqblk->dqb_spacemod); | |
496 | inodechange = le64_to_cpu(dqblk->dqb_inodemod); | |
497 | dquot->dq_dqb.dqb_curspace += spacechange; | |
498 | dquot->dq_dqb.dqb_curinodes += inodechange; | |
499 | spin_unlock(&dq_data_lock); | |
500 | /* We want to drop reference held by the crashed | |
501 | * node. Since we have our own reference we know | |
502 | * global structure actually won't be freed. */ | |
503 | status = ocfs2_global_release_dquot(dquot); | |
504 | if (status < 0) { | |
505 | mlog_errno(status); | |
506 | goto out_commit; | |
507 | } | |
508 | /* Release local quota file entry */ | |
13723d00 | 509 | status = ocfs2_journal_access_dq(handle, lqinode, |
2205363d JK |
510 | qbh, OCFS2_JOURNAL_ACCESS_WRITE); |
511 | if (status < 0) { | |
512 | mlog_errno(status); | |
513 | goto out_commit; | |
514 | } | |
515 | lock_buffer(qbh); | |
516 | WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap)); | |
517 | ocfs2_clear_bit(bit, dchunk->dqc_bitmap); | |
518 | le32_add_cpu(&dchunk->dqc_free, 1); | |
519 | unlock_buffer(qbh); | |
520 | status = ocfs2_journal_dirty(handle, qbh); | |
521 | if (status < 0) | |
522 | mlog_errno(status); | |
523 | out_commit: | |
524 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
525 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
526 | out_put_dquot: | |
527 | dqput(dquot); | |
528 | out_put_bh: | |
529 | brelse(qbh); | |
530 | if (status < 0) | |
531 | break; | |
532 | } | |
533 | brelse(hbh); | |
534 | list_del(&rchunk->rc_list); | |
535 | kfree(rchunk->rc_bitmap); | |
536 | kfree(rchunk); | |
537 | if (status < 0) | |
538 | break; | |
539 | } | |
540 | ocfs2_unlock_global_qf(oinfo, 1); | |
541 | out: | |
542 | if (status < 0) | |
543 | free_recovery_list(&(rec->r_list[type])); | |
544 | mlog_exit(status); | |
545 | return status; | |
546 | } | |
547 | ||
548 | /* Recover local quota files for given node different from us */ | |
549 | int ocfs2_finish_quota_recovery(struct ocfs2_super *osb, | |
550 | struct ocfs2_quota_recovery *rec, | |
551 | int slot_num) | |
552 | { | |
553 | unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE, | |
554 | LOCAL_GROUP_QUOTA_SYSTEM_INODE }; | |
555 | struct super_block *sb = osb->sb; | |
556 | struct ocfs2_local_disk_dqinfo *ldinfo; | |
557 | struct buffer_head *bh; | |
558 | handle_t *handle; | |
559 | int type; | |
560 | int status = 0; | |
561 | struct inode *lqinode; | |
562 | unsigned int flags; | |
563 | ||
564 | mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num); | |
565 | mutex_lock(&sb_dqopt(sb)->dqonoff_mutex); | |
566 | for (type = 0; type < MAXQUOTAS; type++) { | |
567 | if (list_empty(&(rec->r_list[type]))) | |
568 | continue; | |
569 | mlog(0, "Recovering quota in slot %d\n", slot_num); | |
570 | lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num); | |
571 | if (!lqinode) { | |
572 | status = -ENOENT; | |
573 | goto out; | |
574 | } | |
575 | status = ocfs2_inode_lock_full(lqinode, NULL, 1, | |
576 | OCFS2_META_LOCK_NOQUEUE); | |
577 | /* Someone else is holding the lock? Then he must be | |
578 | * doing the recovery. Just skip the file... */ | |
579 | if (status == -EAGAIN) { | |
580 | mlog(ML_NOTICE, "skipping quota recovery for slot %d " | |
581 | "because quota file is locked.\n", slot_num); | |
582 | status = 0; | |
583 | goto out_put; | |
584 | } else if (status < 0) { | |
585 | mlog_errno(status); | |
586 | goto out_put; | |
587 | } | |
588 | /* Now read local header */ | |
85eb8b73 JB |
589 | bh = NULL; |
590 | status = ocfs2_read_quota_block(lqinode, 0, &bh); | |
591 | if (status) { | |
2205363d JK |
592 | mlog_errno(status); |
593 | mlog(ML_ERROR, "failed to read quota file info header " | |
594 | "(slot=%d type=%d)\n", slot_num, type); | |
595 | goto out_lock; | |
596 | } | |
597 | ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + | |
598 | OCFS2_LOCAL_INFO_OFF); | |
599 | /* Is recovery still needed? */ | |
600 | flags = le32_to_cpu(ldinfo->dqi_flags); | |
601 | if (!(flags & OLQF_CLEAN)) | |
602 | status = ocfs2_recover_local_quota_file(lqinode, | |
603 | type, | |
604 | rec); | |
605 | /* We don't want to mark file as clean when it is actually | |
606 | * active */ | |
607 | if (slot_num == osb->slot_num) | |
608 | goto out_bh; | |
609 | /* Mark quota file as clean if we are recovering quota file of | |
610 | * some other node. */ | |
611 | handle = ocfs2_start_trans(osb, 1); | |
612 | if (IS_ERR(handle)) { | |
613 | status = PTR_ERR(handle); | |
614 | mlog_errno(status); | |
615 | goto out_bh; | |
616 | } | |
13723d00 JB |
617 | status = ocfs2_journal_access_dq(handle, lqinode, bh, |
618 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2205363d JK |
619 | if (status < 0) { |
620 | mlog_errno(status); | |
621 | goto out_trans; | |
622 | } | |
623 | lock_buffer(bh); | |
624 | ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN); | |
625 | unlock_buffer(bh); | |
626 | status = ocfs2_journal_dirty(handle, bh); | |
627 | if (status < 0) | |
628 | mlog_errno(status); | |
629 | out_trans: | |
630 | ocfs2_commit_trans(osb, handle); | |
631 | out_bh: | |
632 | brelse(bh); | |
633 | out_lock: | |
634 | ocfs2_inode_unlock(lqinode, 1); | |
635 | out_put: | |
636 | iput(lqinode); | |
637 | if (status < 0) | |
638 | break; | |
639 | } | |
640 | out: | |
641 | mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex); | |
642 | kfree(rec); | |
643 | return status; | |
644 | } | |
645 | ||
9e33d69f JK |
646 | /* Read information header from quota file */ |
647 | static int ocfs2_local_read_info(struct super_block *sb, int type) | |
648 | { | |
649 | struct ocfs2_local_disk_dqinfo *ldinfo; | |
650 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
651 | struct ocfs2_mem_dqinfo *oinfo; | |
652 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
653 | int status; | |
654 | struct buffer_head *bh = NULL; | |
2205363d | 655 | struct ocfs2_quota_recovery *rec; |
9e33d69f JK |
656 | int locked = 0; |
657 | ||
b4c30de3 JK |
658 | /* We don't need the lock and we have to acquire quota file locks |
659 | * which will later depend on this lock */ | |
660 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
9e33d69f JK |
661 | info->dqi_maxblimit = 0x7fffffffffffffffLL; |
662 | info->dqi_maxilimit = 0x7fffffffffffffffLL; | |
663 | oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS); | |
664 | if (!oinfo) { | |
665 | mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota" | |
666 | " info."); | |
667 | goto out_err; | |
668 | } | |
669 | info->dqi_priv = oinfo; | |
670 | oinfo->dqi_type = type; | |
671 | INIT_LIST_HEAD(&oinfo->dqi_chunk); | |
2205363d | 672 | oinfo->dqi_rec = NULL; |
9e33d69f JK |
673 | oinfo->dqi_lqi_bh = NULL; |
674 | oinfo->dqi_ibh = NULL; | |
675 | ||
676 | status = ocfs2_global_read_info(sb, type); | |
677 | if (status < 0) | |
678 | goto out_err; | |
679 | ||
680 | status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1); | |
681 | if (status < 0) { | |
682 | mlog_errno(status); | |
683 | goto out_err; | |
684 | } | |
685 | locked = 1; | |
686 | ||
687 | /* Now read local header */ | |
85eb8b73 JB |
688 | status = ocfs2_read_quota_block(lqinode, 0, &bh); |
689 | if (status) { | |
9e33d69f JK |
690 | mlog_errno(status); |
691 | mlog(ML_ERROR, "failed to read quota file info header " | |
692 | "(type=%d)\n", type); | |
693 | goto out_err; | |
694 | } | |
695 | ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data + | |
696 | OCFS2_LOCAL_INFO_OFF); | |
697 | info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags); | |
698 | oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks); | |
699 | oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks); | |
700 | oinfo->dqi_ibh = bh; | |
701 | ||
702 | /* We crashed when using local quota file? */ | |
2205363d JK |
703 | if (!(info->dqi_flags & OLQF_CLEAN)) { |
704 | rec = OCFS2_SB(sb)->quota_rec; | |
705 | if (!rec) { | |
706 | rec = ocfs2_alloc_quota_recovery(); | |
707 | if (!rec) { | |
708 | status = -ENOMEM; | |
709 | mlog_errno(status); | |
710 | goto out_err; | |
711 | } | |
712 | OCFS2_SB(sb)->quota_rec = rec; | |
713 | } | |
9e33d69f | 714 | |
2205363d JK |
715 | status = ocfs2_recovery_load_quota(lqinode, ldinfo, type, |
716 | &rec->r_list[type]); | |
717 | if (status < 0) { | |
718 | mlog_errno(status); | |
719 | goto out_err; | |
720 | } | |
721 | } | |
722 | ||
723 | status = ocfs2_load_local_quota_bitmaps(lqinode, | |
9e33d69f JK |
724 | ldinfo, |
725 | &oinfo->dqi_chunk); | |
726 | if (status < 0) { | |
727 | mlog_errno(status); | |
728 | goto out_err; | |
729 | } | |
730 | ||
731 | /* Now mark quota file as used */ | |
732 | info->dqi_flags &= ~OLQF_CLEAN; | |
733 | status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info); | |
734 | if (status < 0) { | |
735 | mlog_errno(status); | |
736 | goto out_err; | |
737 | } | |
738 | ||
b4c30de3 | 739 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
740 | return 0; |
741 | out_err: | |
742 | if (oinfo) { | |
743 | iput(oinfo->dqi_gqinode); | |
744 | ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); | |
745 | ocfs2_lock_res_free(&oinfo->dqi_gqlock); | |
746 | brelse(oinfo->dqi_lqi_bh); | |
747 | if (locked) | |
748 | ocfs2_inode_unlock(lqinode, 1); | |
749 | ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk); | |
750 | kfree(oinfo); | |
751 | } | |
752 | brelse(bh); | |
b4c30de3 | 753 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
754 | return -1; |
755 | } | |
756 | ||
757 | /* Write local info to quota file */ | |
758 | static int ocfs2_local_write_info(struct super_block *sb, int type) | |
759 | { | |
760 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
761 | struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv) | |
762 | ->dqi_ibh; | |
763 | int status; | |
764 | ||
765 | status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info, | |
766 | info); | |
767 | if (status < 0) { | |
768 | mlog_errno(status); | |
769 | return -1; | |
770 | } | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | /* Release info from memory */ | |
776 | static int ocfs2_local_free_info(struct super_block *sb, int type) | |
777 | { | |
778 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
779 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
780 | struct ocfs2_quota_chunk *chunk; | |
781 | struct ocfs2_local_disk_chunk *dchunk; | |
782 | int mark_clean = 1, len; | |
783 | int status; | |
784 | ||
171bf93c MF |
785 | /* At this point we know there are no more dquots and thus |
786 | * even if there's some sync in the pdflush queue, it won't | |
787 | * find any dquots and return without doing anything */ | |
788 | cancel_delayed_work_sync(&oinfo->dqi_sync_work); | |
9e33d69f JK |
789 | iput(oinfo->dqi_gqinode); |
790 | ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); | |
791 | ocfs2_lock_res_free(&oinfo->dqi_gqlock); | |
792 | list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) { | |
793 | dchunk = (struct ocfs2_local_disk_chunk *) | |
794 | (chunk->qc_headerbh->b_data); | |
795 | if (chunk->qc_num < oinfo->dqi_chunks - 1) { | |
796 | len = ol_chunk_entries(sb); | |
797 | } else { | |
798 | len = (oinfo->dqi_blocks - | |
799 | ol_quota_chunk_block(sb, chunk->qc_num) - 1) | |
800 | * ol_quota_entries_per_block(sb); | |
801 | } | |
802 | /* Not all entries free? Bug! */ | |
803 | if (le32_to_cpu(dchunk->dqc_free) != len) { | |
804 | mlog(ML_ERROR, "releasing quota file with used " | |
805 | "entries (type=%d)\n", type); | |
806 | mark_clean = 0; | |
807 | } | |
808 | } | |
809 | ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk); | |
810 | ||
2205363d JK |
811 | /* dqonoff_mutex protects us against racing with recovery thread... */ |
812 | if (oinfo->dqi_rec) { | |
813 | ocfs2_free_quota_recovery(oinfo->dqi_rec); | |
814 | mark_clean = 0; | |
815 | } | |
816 | ||
9e33d69f JK |
817 | if (!mark_clean) |
818 | goto out; | |
819 | ||
820 | /* Mark local file as clean */ | |
821 | info->dqi_flags |= OLQF_CLEAN; | |
822 | status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], | |
823 | oinfo->dqi_ibh, | |
824 | olq_update_info, | |
825 | info); | |
826 | if (status < 0) { | |
827 | mlog_errno(status); | |
828 | goto out; | |
829 | } | |
830 | ||
831 | out: | |
832 | ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1); | |
833 | brelse(oinfo->dqi_ibh); | |
834 | brelse(oinfo->dqi_lqi_bh); | |
835 | kfree(oinfo); | |
836 | return 0; | |
837 | } | |
838 | ||
839 | static void olq_set_dquot(struct buffer_head *bh, void *private) | |
840 | { | |
841 | struct ocfs2_dquot *od = private; | |
842 | struct ocfs2_local_disk_dqblk *dqblk; | |
843 | struct super_block *sb = od->dq_dquot.dq_sb; | |
844 | ||
845 | dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data | |
846 | + ol_dqblk_block_offset(sb, od->dq_local_off)); | |
847 | ||
848 | dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id); | |
849 | spin_lock(&dq_data_lock); | |
850 | dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace - | |
851 | od->dq_origspace); | |
852 | dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes - | |
853 | od->dq_originodes); | |
854 | spin_unlock(&dq_data_lock); | |
855 | mlog(0, "Writing local dquot %u space %lld inodes %lld\n", | |
9a2f3866 JK |
856 | od->dq_dquot.dq_id, (long long)le64_to_cpu(dqblk->dqb_spacemod), |
857 | (long long)le64_to_cpu(dqblk->dqb_inodemod)); | |
9e33d69f JK |
858 | } |
859 | ||
860 | /* Write dquot to local quota file */ | |
861 | static int ocfs2_local_write_dquot(struct dquot *dquot) | |
862 | { | |
863 | struct super_block *sb = dquot->dq_sb; | |
864 | struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); | |
85eb8b73 | 865 | struct buffer_head *bh = NULL; |
9e33d69f JK |
866 | int status; |
867 | ||
85eb8b73 | 868 | status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type], |
9e33d69f | 869 | ol_dqblk_file_block(sb, od->dq_local_off), |
85eb8b73 JB |
870 | &bh); |
871 | if (status) { | |
9e33d69f JK |
872 | mlog_errno(status); |
873 | goto out; | |
874 | } | |
875 | status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh, | |
876 | olq_set_dquot, od); | |
877 | if (status < 0) { | |
878 | mlog_errno(status); | |
879 | goto out; | |
880 | } | |
881 | out: | |
882 | brelse(bh); | |
883 | return status; | |
884 | } | |
885 | ||
886 | /* Find free entry in local quota file */ | |
887 | static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb, | |
888 | int type, | |
889 | int *offset) | |
890 | { | |
891 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
892 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
893 | struct ocfs2_quota_chunk *chunk; | |
894 | struct ocfs2_local_disk_chunk *dchunk; | |
895 | int found = 0, len; | |
896 | ||
897 | list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) { | |
898 | dchunk = (struct ocfs2_local_disk_chunk *) | |
899 | chunk->qc_headerbh->b_data; | |
900 | if (le32_to_cpu(dchunk->dqc_free) > 0) { | |
901 | found = 1; | |
902 | break; | |
903 | } | |
904 | } | |
905 | if (!found) | |
906 | return NULL; | |
907 | ||
908 | if (chunk->qc_num < oinfo->dqi_chunks - 1) { | |
909 | len = ol_chunk_entries(sb); | |
910 | } else { | |
911 | len = (oinfo->dqi_blocks - | |
912 | ol_quota_chunk_block(sb, chunk->qc_num) - 1) | |
913 | * ol_quota_entries_per_block(sb); | |
914 | } | |
915 | ||
916 | found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0); | |
917 | /* We failed? */ | |
918 | if (found == len) { | |
919 | mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u" | |
920 | " entries free (type=%d)\n", chunk->qc_num, | |
921 | le32_to_cpu(dchunk->dqc_free), type); | |
922 | return ERR_PTR(-EIO); | |
923 | } | |
924 | *offset = found; | |
925 | return chunk; | |
926 | } | |
927 | ||
928 | /* Add new chunk to the local quota file */ | |
929 | static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk( | |
930 | struct super_block *sb, | |
931 | int type, | |
932 | int *offset) | |
933 | { | |
934 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
935 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
936 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
937 | struct ocfs2_quota_chunk *chunk = NULL; | |
938 | struct ocfs2_local_disk_chunk *dchunk; | |
939 | int status; | |
940 | handle_t *handle; | |
941 | struct buffer_head *bh = NULL; | |
942 | u64 p_blkno; | |
943 | ||
944 | /* We are protected by dqio_sem so no locking needed */ | |
945 | status = ocfs2_extend_no_holes(lqinode, | |
946 | lqinode->i_size + 2 * sb->s_blocksize, | |
947 | lqinode->i_size); | |
948 | if (status < 0) { | |
949 | mlog_errno(status); | |
950 | goto out; | |
951 | } | |
952 | status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh, | |
953 | lqinode->i_size + 2 * sb->s_blocksize); | |
954 | if (status < 0) { | |
955 | mlog_errno(status); | |
956 | goto out; | |
957 | } | |
958 | ||
959 | chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS); | |
960 | if (!chunk) { | |
961 | status = -ENOMEM; | |
962 | mlog_errno(status); | |
963 | goto out; | |
964 | } | |
965 | ||
966 | down_read(&OCFS2_I(lqinode)->ip_alloc_sem); | |
967 | status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks, | |
968 | &p_blkno, NULL, NULL); | |
969 | up_read(&OCFS2_I(lqinode)->ip_alloc_sem); | |
970 | if (status < 0) { | |
971 | mlog_errno(status); | |
972 | goto out; | |
973 | } | |
974 | bh = sb_getblk(sb, p_blkno); | |
975 | if (!bh) { | |
976 | status = -ENOMEM; | |
977 | mlog_errno(status); | |
978 | goto out; | |
979 | } | |
980 | dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data; | |
981 | ||
982 | handle = ocfs2_start_trans(OCFS2_SB(sb), 2); | |
983 | if (IS_ERR(handle)) { | |
984 | status = PTR_ERR(handle); | |
985 | mlog_errno(status); | |
986 | goto out; | |
987 | } | |
988 | ||
13723d00 JB |
989 | status = ocfs2_journal_access_dq(handle, lqinode, bh, |
990 | OCFS2_JOURNAL_ACCESS_WRITE); | |
9e33d69f JK |
991 | if (status < 0) { |
992 | mlog_errno(status); | |
993 | goto out_trans; | |
994 | } | |
995 | lock_buffer(bh); | |
df32b334 | 996 | dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb)); |
9e33d69f JK |
997 | memset(dchunk->dqc_bitmap, 0, |
998 | sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) - | |
999 | OCFS2_QBLK_RESERVED_SPACE); | |
1000 | set_buffer_uptodate(bh); | |
1001 | unlock_buffer(bh); | |
1002 | status = ocfs2_journal_dirty(handle, bh); | |
1003 | if (status < 0) { | |
1004 | mlog_errno(status); | |
1005 | goto out_trans; | |
1006 | } | |
1007 | ||
1008 | oinfo->dqi_blocks += 2; | |
1009 | oinfo->dqi_chunks++; | |
1010 | status = ocfs2_local_write_info(sb, type); | |
1011 | if (status < 0) { | |
1012 | mlog_errno(status); | |
1013 | goto out_trans; | |
1014 | } | |
1015 | status = ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1016 | if (status < 0) { | |
1017 | mlog_errno(status); | |
1018 | goto out; | |
1019 | } | |
1020 | ||
1021 | list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk); | |
1022 | chunk->qc_num = list_entry(chunk->qc_chunk.prev, | |
1023 | struct ocfs2_quota_chunk, | |
1024 | qc_chunk)->qc_num + 1; | |
1025 | chunk->qc_headerbh = bh; | |
1026 | *offset = 0; | |
1027 | return chunk; | |
1028 | out_trans: | |
1029 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1030 | out: | |
1031 | brelse(bh); | |
1032 | kmem_cache_free(ocfs2_qf_chunk_cachep, chunk); | |
1033 | return ERR_PTR(status); | |
1034 | } | |
1035 | ||
1036 | /* Find free entry in local quota file */ | |
1037 | static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file( | |
1038 | struct super_block *sb, | |
1039 | int type, | |
1040 | int *offset) | |
1041 | { | |
1042 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
1043 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
1044 | struct ocfs2_quota_chunk *chunk; | |
1045 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
1046 | struct ocfs2_local_disk_chunk *dchunk; | |
1047 | int epb = ol_quota_entries_per_block(sb); | |
1048 | unsigned int chunk_blocks; | |
1049 | int status; | |
1050 | handle_t *handle; | |
1051 | ||
1052 | if (list_empty(&oinfo->dqi_chunk)) | |
1053 | return ocfs2_local_quota_add_chunk(sb, type, offset); | |
1054 | /* Is the last chunk full? */ | |
1055 | chunk = list_entry(oinfo->dqi_chunk.prev, | |
1056 | struct ocfs2_quota_chunk, qc_chunk); | |
1057 | chunk_blocks = oinfo->dqi_blocks - | |
1058 | ol_quota_chunk_block(sb, chunk->qc_num) - 1; | |
1059 | if (ol_chunk_blocks(sb) == chunk_blocks) | |
1060 | return ocfs2_local_quota_add_chunk(sb, type, offset); | |
1061 | ||
1062 | /* We are protected by dqio_sem so no locking needed */ | |
1063 | status = ocfs2_extend_no_holes(lqinode, | |
1064 | lqinode->i_size + sb->s_blocksize, | |
1065 | lqinode->i_size); | |
1066 | if (status < 0) { | |
1067 | mlog_errno(status); | |
1068 | goto out; | |
1069 | } | |
1070 | status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh, | |
1071 | lqinode->i_size + sb->s_blocksize); | |
1072 | if (status < 0) { | |
1073 | mlog_errno(status); | |
1074 | goto out; | |
1075 | } | |
1076 | handle = ocfs2_start_trans(OCFS2_SB(sb), 2); | |
1077 | if (IS_ERR(handle)) { | |
1078 | status = PTR_ERR(handle); | |
1079 | mlog_errno(status); | |
1080 | goto out; | |
1081 | } | |
13723d00 | 1082 | status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh, |
9e33d69f JK |
1083 | OCFS2_JOURNAL_ACCESS_WRITE); |
1084 | if (status < 0) { | |
1085 | mlog_errno(status); | |
1086 | goto out_trans; | |
1087 | } | |
1088 | ||
1089 | dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data; | |
1090 | lock_buffer(chunk->qc_headerbh); | |
1091 | le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb)); | |
1092 | unlock_buffer(chunk->qc_headerbh); | |
1093 | status = ocfs2_journal_dirty(handle, chunk->qc_headerbh); | |
1094 | if (status < 0) { | |
1095 | mlog_errno(status); | |
1096 | goto out_trans; | |
1097 | } | |
1098 | oinfo->dqi_blocks++; | |
1099 | status = ocfs2_local_write_info(sb, type); | |
1100 | if (status < 0) { | |
1101 | mlog_errno(status); | |
1102 | goto out_trans; | |
1103 | } | |
1104 | ||
1105 | status = ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1106 | if (status < 0) { | |
1107 | mlog_errno(status); | |
1108 | goto out; | |
1109 | } | |
1110 | *offset = chunk_blocks * epb; | |
1111 | return chunk; | |
1112 | out_trans: | |
1113 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
1114 | out: | |
1115 | return ERR_PTR(status); | |
1116 | } | |
1117 | ||
df32b334 | 1118 | static void olq_alloc_dquot(struct buffer_head *bh, void *private) |
9e33d69f JK |
1119 | { |
1120 | int *offset = private; | |
1121 | struct ocfs2_local_disk_chunk *dchunk; | |
1122 | ||
1123 | dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data; | |
1124 | ocfs2_set_bit(*offset, dchunk->dqc_bitmap); | |
1125 | le32_add_cpu(&dchunk->dqc_free, -1); | |
1126 | } | |
1127 | ||
1128 | /* Create dquot in the local file for given id */ | |
1129 | static int ocfs2_create_local_dquot(struct dquot *dquot) | |
1130 | { | |
1131 | struct super_block *sb = dquot->dq_sb; | |
1132 | int type = dquot->dq_type; | |
1133 | struct inode *lqinode = sb_dqopt(sb)->files[type]; | |
1134 | struct ocfs2_quota_chunk *chunk; | |
1135 | struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); | |
1136 | int offset; | |
1137 | int status; | |
1138 | ||
1139 | chunk = ocfs2_find_free_entry(sb, type, &offset); | |
1140 | if (!chunk) { | |
1141 | chunk = ocfs2_extend_local_quota_file(sb, type, &offset); | |
1142 | if (IS_ERR(chunk)) | |
1143 | return PTR_ERR(chunk); | |
1144 | } else if (IS_ERR(chunk)) { | |
1145 | return PTR_ERR(chunk); | |
1146 | } | |
1147 | od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset); | |
1148 | od->dq_chunk = chunk; | |
1149 | ||
1150 | /* Initialize dquot structure on disk */ | |
1151 | status = ocfs2_local_write_dquot(dquot); | |
1152 | if (status < 0) { | |
1153 | mlog_errno(status); | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | /* Mark structure as allocated */ | |
1158 | status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot, | |
1159 | &offset); | |
1160 | if (status < 0) { | |
1161 | mlog_errno(status); | |
1162 | goto out; | |
1163 | } | |
1164 | out: | |
1165 | return status; | |
1166 | } | |
1167 | ||
1168 | /* Create entry in local file for dquot, load data from the global file */ | |
1169 | static int ocfs2_local_read_dquot(struct dquot *dquot) | |
1170 | { | |
1171 | int status; | |
1172 | ||
1173 | mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type); | |
1174 | ||
1175 | status = ocfs2_global_read_dquot(dquot); | |
1176 | if (status < 0) { | |
1177 | mlog_errno(status); | |
1178 | goto out_err; | |
1179 | } | |
1180 | ||
1181 | /* Now create entry in the local quota file */ | |
1182 | status = ocfs2_create_local_dquot(dquot); | |
1183 | if (status < 0) { | |
1184 | mlog_errno(status); | |
1185 | goto out_err; | |
1186 | } | |
1187 | mlog_exit(0); | |
1188 | return 0; | |
1189 | out_err: | |
1190 | mlog_exit(status); | |
1191 | return status; | |
1192 | } | |
1193 | ||
1194 | /* Release dquot structure from local quota file. ocfs2_release_dquot() has | |
1195 | * already started a transaction and obtained exclusive lock for global | |
1196 | * quota file. */ | |
1197 | static int ocfs2_local_release_dquot(struct dquot *dquot) | |
1198 | { | |
1199 | int status; | |
1200 | int type = dquot->dq_type; | |
1201 | struct ocfs2_dquot *od = OCFS2_DQUOT(dquot); | |
1202 | struct super_block *sb = dquot->dq_sb; | |
1203 | struct ocfs2_local_disk_chunk *dchunk; | |
1204 | int offset; | |
1205 | handle_t *handle = journal_current_handle(); | |
1206 | ||
1207 | BUG_ON(!handle); | |
1208 | /* First write all local changes to global file */ | |
1209 | status = ocfs2_global_release_dquot(dquot); | |
1210 | if (status < 0) { | |
1211 | mlog_errno(status); | |
1212 | goto out; | |
1213 | } | |
1214 | ||
13723d00 | 1215 | status = ocfs2_journal_access_dq(handle, sb_dqopt(sb)->files[type], |
9e33d69f JK |
1216 | od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE); |
1217 | if (status < 0) { | |
1218 | mlog_errno(status); | |
1219 | goto out; | |
1220 | } | |
1221 | offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num, | |
1222 | od->dq_local_off); | |
1223 | dchunk = (struct ocfs2_local_disk_chunk *) | |
1224 | (od->dq_chunk->qc_headerbh->b_data); | |
1225 | /* Mark structure as freed */ | |
1226 | lock_buffer(od->dq_chunk->qc_headerbh); | |
1227 | ocfs2_clear_bit(offset, dchunk->dqc_bitmap); | |
1228 | le32_add_cpu(&dchunk->dqc_free, 1); | |
1229 | unlock_buffer(od->dq_chunk->qc_headerbh); | |
1230 | status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh); | |
1231 | if (status < 0) { | |
1232 | mlog_errno(status); | |
1233 | goto out; | |
1234 | } | |
1235 | status = 0; | |
1236 | out: | |
1237 | /* Clear the read bit so that next time someone uses this | |
1238 | * dquot he reads fresh info from disk and allocates local | |
1239 | * dquot structure */ | |
1240 | clear_bit(DQ_READ_B, &dquot->dq_flags); | |
1241 | return status; | |
1242 | } | |
1243 | ||
1244 | static struct quota_format_ops ocfs2_format_ops = { | |
1245 | .check_quota_file = ocfs2_local_check_quota_file, | |
1246 | .read_file_info = ocfs2_local_read_info, | |
1247 | .write_file_info = ocfs2_global_write_info, | |
1248 | .free_file_info = ocfs2_local_free_info, | |
1249 | .read_dqblk = ocfs2_local_read_dquot, | |
1250 | .commit_dqblk = ocfs2_local_write_dquot, | |
1251 | .release_dqblk = ocfs2_local_release_dquot, | |
1252 | }; | |
1253 | ||
1254 | struct quota_format_type ocfs2_quota_format = { | |
1255 | .qf_fmt_id = QFMT_OCFS2, | |
1256 | .qf_ops = &ocfs2_format_ops, | |
1257 | .qf_owner = THIS_MODULE | |
1258 | }; |