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Diffstat (limited to 'fs/ocfs2/quota_local.c')
-rw-r--r--fs/ocfs2/quota_local.c833
1 files changed, 833 insertions, 0 deletions
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
new file mode 100644
index 000000000000..55c3f2f98dcd
--- /dev/null
+++ b/fs/ocfs2/quota_local.c
@@ -0,0 +1,833 @@
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 */
25static 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 */
32static 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 */
40static 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 */
46static 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
52/* Offset of the dquot structure in the quota file */
53static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
54{
55 int epb = ol_quota_entries_per_block(sb);
56
57 return ((ol_quota_chunk_block(sb, c) + 1 + off / epb)
58 << sb->s_blocksize_bits) +
59 (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
60}
61
62/* Compute block number from given offset */
63static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
64{
65 return off >> sb->s_blocksize_bits;
66}
67
68static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
69{
70 return off & ((1 << sb->s_blocksize_bits) - 1);
71}
72
73/* Compute offset in the chunk of a structure with the given offset */
74static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
75{
76 int epb = ol_quota_entries_per_block(sb);
77
78 return ((off >> sb->s_blocksize_bits) -
79 ol_quota_chunk_block(sb, c) - 1) * epb
80 + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
81 sizeof(struct ocfs2_local_disk_dqblk);
82}
83
84/* Write bufferhead into the fs */
85static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
86 void (*modify)(struct buffer_head *, void *), void *private)
87{
88 struct super_block *sb = inode->i_sb;
89 handle_t *handle;
90 int status;
91
92 handle = ocfs2_start_trans(OCFS2_SB(sb), 1);
93 if (IS_ERR(handle)) {
94 status = PTR_ERR(handle);
95 mlog_errno(status);
96 return status;
97 }
98 status = ocfs2_journal_access(handle, inode, bh,
99 OCFS2_JOURNAL_ACCESS_WRITE);
100 if (status < 0) {
101 mlog_errno(status);
102 ocfs2_commit_trans(OCFS2_SB(sb), handle);
103 return status;
104 }
105 lock_buffer(bh);
106 modify(bh, private);
107 unlock_buffer(bh);
108 status = ocfs2_journal_dirty(handle, bh);
109 if (status < 0) {
110 mlog_errno(status);
111 ocfs2_commit_trans(OCFS2_SB(sb), handle);
112 return status;
113 }
114 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
115 if (status < 0) {
116 mlog_errno(status);
117 return status;
118 }
119 return 0;
120}
121
122/* Check whether we understand format of quota files */
123static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
124{
125 unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
126 unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
127 unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
128 unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
129 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
130 GROUP_QUOTA_SYSTEM_INODE };
131 struct buffer_head *bh;
132 struct inode *linode = sb_dqopt(sb)->files[type];
133 struct inode *ginode = NULL;
134 struct ocfs2_disk_dqheader *dqhead;
135 int status, ret = 0;
136
137 /* First check whether we understand local quota file */
138 bh = ocfs2_read_quota_block(linode, 0, &status);
139 if (!bh) {
140 mlog_errno(status);
141 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
142 type);
143 goto out_err;
144 }
145 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
146 if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
147 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
148 " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
149 lmagics[type], type);
150 goto out_err;
151 }
152 if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
153 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
154 " type=%d\n", le32_to_cpu(dqhead->dqh_version),
155 lversions[type], type);
156 goto out_err;
157 }
158 brelse(bh);
159 bh = NULL;
160
161 /* Next check whether we understand global quota file */
162 ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
163 OCFS2_INVALID_SLOT);
164 if (!ginode) {
165 mlog(ML_ERROR, "cannot get global quota file inode "
166 "(type=%d)\n", type);
167 goto out_err;
168 }
169 /* Since the header is read only, we don't care about locking */
170 bh = ocfs2_read_quota_block(ginode, 0, &status);
171 if (!bh) {
172 mlog_errno(status);
173 mlog(ML_ERROR, "failed to read global quota file header "
174 "(type=%d)\n", type);
175 goto out_err;
176 }
177 dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
178 if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
179 mlog(ML_ERROR, "global quota file magic does not match "
180 "(%u != %u), type=%d\n",
181 le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
182 goto out_err;
183 }
184 if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
185 mlog(ML_ERROR, "global quota file version does not match "
186 "(%u != %u), type=%d\n",
187 le32_to_cpu(dqhead->dqh_version), gversions[type],
188 type);
189 goto out_err;
190 }
191
192 ret = 1;
193out_err:
194 brelse(bh);
195 iput(ginode);
196 return ret;
197}
198
199/* Release given list of quota file chunks */
200static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
201{
202 struct ocfs2_quota_chunk *pos, *next;
203
204 list_for_each_entry_safe(pos, next, head, qc_chunk) {
205 list_del(&pos->qc_chunk);
206 brelse(pos->qc_headerbh);
207 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
208 }
209}
210
211/* Load quota bitmaps into memory */
212static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
213 struct ocfs2_local_disk_dqinfo *ldinfo,
214 struct list_head *head)
215{
216 struct ocfs2_quota_chunk *newchunk;
217 int i, status;
218
219 INIT_LIST_HEAD(head);
220 for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
221 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
222 if (!newchunk) {
223 ocfs2_release_local_quota_bitmaps(head);
224 return -ENOMEM;
225 }
226 newchunk->qc_num = i;
227 newchunk->qc_headerbh = ocfs2_read_quota_block(inode,
228 ol_quota_chunk_block(inode->i_sb, i),
229 &status);
230 if (!newchunk->qc_headerbh) {
231 mlog_errno(status);
232 kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
233 ocfs2_release_local_quota_bitmaps(head);
234 return status;
235 }
236 list_add_tail(&newchunk->qc_chunk, head);
237 }
238 return 0;
239}
240
241static void olq_update_info(struct buffer_head *bh, void *private)
242{
243 struct mem_dqinfo *info = private;
244 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
245 struct ocfs2_local_disk_dqinfo *ldinfo;
246
247 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
248 OCFS2_LOCAL_INFO_OFF);
249 spin_lock(&dq_data_lock);
250 ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
251 ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
252 ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
253 spin_unlock(&dq_data_lock);
254}
255
256/* Read information header from quota file */
257static int ocfs2_local_read_info(struct super_block *sb, int type)
258{
259 struct ocfs2_local_disk_dqinfo *ldinfo;
260 struct mem_dqinfo *info = sb_dqinfo(sb, type);
261 struct ocfs2_mem_dqinfo *oinfo;
262 struct inode *lqinode = sb_dqopt(sb)->files[type];
263 int status;
264 struct buffer_head *bh = NULL;
265 int locked = 0;
266
267 info->dqi_maxblimit = 0x7fffffffffffffffLL;
268 info->dqi_maxilimit = 0x7fffffffffffffffLL;
269 oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
270 if (!oinfo) {
271 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
272 " info.");
273 goto out_err;
274 }
275 info->dqi_priv = oinfo;
276 oinfo->dqi_type = type;
277 INIT_LIST_HEAD(&oinfo->dqi_chunk);
278 oinfo->dqi_lqi_bh = NULL;
279 oinfo->dqi_ibh = NULL;
280
281 status = ocfs2_global_read_info(sb, type);
282 if (status < 0)
283 goto out_err;
284
285 status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
286 if (status < 0) {
287 mlog_errno(status);
288 goto out_err;
289 }
290 locked = 1;
291
292 /* Now read local header */
293 bh = ocfs2_read_quota_block(lqinode, 0, &status);
294 if (!bh) {
295 mlog_errno(status);
296 mlog(ML_ERROR, "failed to read quota file info header "
297 "(type=%d)\n", type);
298 goto out_err;
299 }
300 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
301 OCFS2_LOCAL_INFO_OFF);
302 info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
303 oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
304 oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
305 oinfo->dqi_ibh = bh;
306
307 /* We crashed when using local quota file? */
308 if (!(info->dqi_flags & OLQF_CLEAN))
309 goto out_err; /* So far we just bail out. Later we should resync here */
310
311 status = ocfs2_load_local_quota_bitmaps(sb_dqopt(sb)->files[type],
312 ldinfo,
313 &oinfo->dqi_chunk);
314 if (status < 0) {
315 mlog_errno(status);
316 goto out_err;
317 }
318
319 /* Now mark quota file as used */
320 info->dqi_flags &= ~OLQF_CLEAN;
321 status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
322 if (status < 0) {
323 mlog_errno(status);
324 goto out_err;
325 }
326
327 return 0;
328out_err:
329 if (oinfo) {
330 iput(oinfo->dqi_gqinode);
331 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
332 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
333 brelse(oinfo->dqi_lqi_bh);
334 if (locked)
335 ocfs2_inode_unlock(lqinode, 1);
336 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
337 kfree(oinfo);
338 }
339 brelse(bh);
340 return -1;
341}
342
343/* Write local info to quota file */
344static int ocfs2_local_write_info(struct super_block *sb, int type)
345{
346 struct mem_dqinfo *info = sb_dqinfo(sb, type);
347 struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
348 ->dqi_ibh;
349 int status;
350
351 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
352 info);
353 if (status < 0) {
354 mlog_errno(status);
355 return -1;
356 }
357
358 return 0;
359}
360
361/* Release info from memory */
362static int ocfs2_local_free_info(struct super_block *sb, int type)
363{
364 struct mem_dqinfo *info = sb_dqinfo(sb, type);
365 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
366 struct ocfs2_quota_chunk *chunk;
367 struct ocfs2_local_disk_chunk *dchunk;
368 int mark_clean = 1, len;
369 int status;
370
371 iput(oinfo->dqi_gqinode);
372 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
373 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
374 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
375 dchunk = (struct ocfs2_local_disk_chunk *)
376 (chunk->qc_headerbh->b_data);
377 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
378 len = ol_chunk_entries(sb);
379 } else {
380 len = (oinfo->dqi_blocks -
381 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
382 * ol_quota_entries_per_block(sb);
383 }
384 /* Not all entries free? Bug! */
385 if (le32_to_cpu(dchunk->dqc_free) != len) {
386 mlog(ML_ERROR, "releasing quota file with used "
387 "entries (type=%d)\n", type);
388 mark_clean = 0;
389 }
390 }
391 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
392
393 if (!mark_clean)
394 goto out;
395
396 /* Mark local file as clean */
397 info->dqi_flags |= OLQF_CLEAN;
398 status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
399 oinfo->dqi_ibh,
400 olq_update_info,
401 info);
402 if (status < 0) {
403 mlog_errno(status);
404 goto out;
405 }
406
407out:
408 ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
409 brelse(oinfo->dqi_ibh);
410 brelse(oinfo->dqi_lqi_bh);
411 kfree(oinfo);
412 return 0;
413}
414
415static void olq_set_dquot(struct buffer_head *bh, void *private)
416{
417 struct ocfs2_dquot *od = private;
418 struct ocfs2_local_disk_dqblk *dqblk;
419 struct super_block *sb = od->dq_dquot.dq_sb;
420
421 dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
422 + ol_dqblk_block_offset(sb, od->dq_local_off));
423
424 dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
425 spin_lock(&dq_data_lock);
426 dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
427 od->dq_origspace);
428 dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
429 od->dq_originodes);
430 spin_unlock(&dq_data_lock);
431 mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
432 od->dq_dquot.dq_id, dqblk->dqb_spacemod, dqblk->dqb_inodemod);
433}
434
435/* Write dquot to local quota file */
436static int ocfs2_local_write_dquot(struct dquot *dquot)
437{
438 struct super_block *sb = dquot->dq_sb;
439 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
440 struct buffer_head *bh;
441 int status;
442
443 bh = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
444 ol_dqblk_file_block(sb, od->dq_local_off),
445 &status);
446 if (!bh) {
447 mlog_errno(status);
448 goto out;
449 }
450 status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
451 olq_set_dquot, od);
452 if (status < 0) {
453 mlog_errno(status);
454 goto out;
455 }
456out:
457 brelse(bh);
458 return status;
459}
460
461/* Find free entry in local quota file */
462static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
463 int type,
464 int *offset)
465{
466 struct mem_dqinfo *info = sb_dqinfo(sb, type);
467 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
468 struct ocfs2_quota_chunk *chunk;
469 struct ocfs2_local_disk_chunk *dchunk;
470 int found = 0, len;
471
472 list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
473 dchunk = (struct ocfs2_local_disk_chunk *)
474 chunk->qc_headerbh->b_data;
475 if (le32_to_cpu(dchunk->dqc_free) > 0) {
476 found = 1;
477 break;
478 }
479 }
480 if (!found)
481 return NULL;
482
483 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
484 len = ol_chunk_entries(sb);
485 } else {
486 len = (oinfo->dqi_blocks -
487 ol_quota_chunk_block(sb, chunk->qc_num) - 1)
488 * ol_quota_entries_per_block(sb);
489 }
490
491 found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
492 /* We failed? */
493 if (found == len) {
494 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
495 " entries free (type=%d)\n", chunk->qc_num,
496 le32_to_cpu(dchunk->dqc_free), type);
497 return ERR_PTR(-EIO);
498 }
499 *offset = found;
500 return chunk;
501}
502
503/* Add new chunk to the local quota file */
504static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
505 struct super_block *sb,
506 int type,
507 int *offset)
508{
509 struct mem_dqinfo *info = sb_dqinfo(sb, type);
510 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
511 struct inode *lqinode = sb_dqopt(sb)->files[type];
512 struct ocfs2_quota_chunk *chunk = NULL;
513 struct ocfs2_local_disk_chunk *dchunk;
514 int status;
515 handle_t *handle;
516 struct buffer_head *bh = NULL;
517 u64 p_blkno;
518
519 /* We are protected by dqio_sem so no locking needed */
520 status = ocfs2_extend_no_holes(lqinode,
521 lqinode->i_size + 2 * sb->s_blocksize,
522 lqinode->i_size);
523 if (status < 0) {
524 mlog_errno(status);
525 goto out;
526 }
527 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
528 lqinode->i_size + 2 * sb->s_blocksize);
529 if (status < 0) {
530 mlog_errno(status);
531 goto out;
532 }
533
534 chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
535 if (!chunk) {
536 status = -ENOMEM;
537 mlog_errno(status);
538 goto out;
539 }
540
541 down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
542 status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
543 &p_blkno, NULL, NULL);
544 up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
545 if (status < 0) {
546 mlog_errno(status);
547 goto out;
548 }
549 bh = sb_getblk(sb, p_blkno);
550 if (!bh) {
551 status = -ENOMEM;
552 mlog_errno(status);
553 goto out;
554 }
555 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
556
557 handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
558 if (IS_ERR(handle)) {
559 status = PTR_ERR(handle);
560 mlog_errno(status);
561 goto out;
562 }
563
564 status = ocfs2_journal_access(handle, lqinode, bh,
565 OCFS2_JOURNAL_ACCESS_WRITE);
566 if (status < 0) {
567 mlog_errno(status);
568 goto out_trans;
569 }
570 lock_buffer(bh);
571 dchunk->dqc_free = ol_quota_entries_per_block(sb);
572 memset(dchunk->dqc_bitmap, 0,
573 sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
574 OCFS2_QBLK_RESERVED_SPACE);
575 set_buffer_uptodate(bh);
576 unlock_buffer(bh);
577 status = ocfs2_journal_dirty(handle, bh);
578 if (status < 0) {
579 mlog_errno(status);
580 goto out_trans;
581 }
582
583 oinfo->dqi_blocks += 2;
584 oinfo->dqi_chunks++;
585 status = ocfs2_local_write_info(sb, type);
586 if (status < 0) {
587 mlog_errno(status);
588 goto out_trans;
589 }
590 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
591 if (status < 0) {
592 mlog_errno(status);
593 goto out;
594 }
595
596 list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
597 chunk->qc_num = list_entry(chunk->qc_chunk.prev,
598 struct ocfs2_quota_chunk,
599 qc_chunk)->qc_num + 1;
600 chunk->qc_headerbh = bh;
601 *offset = 0;
602 return chunk;
603out_trans:
604 ocfs2_commit_trans(OCFS2_SB(sb), handle);
605out:
606 brelse(bh);
607 kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
608 return ERR_PTR(status);
609}
610
611/* Find free entry in local quota file */
612static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
613 struct super_block *sb,
614 int type,
615 int *offset)
616{
617 struct mem_dqinfo *info = sb_dqinfo(sb, type);
618 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
619 struct ocfs2_quota_chunk *chunk;
620 struct inode *lqinode = sb_dqopt(sb)->files[type];
621 struct ocfs2_local_disk_chunk *dchunk;
622 int epb = ol_quota_entries_per_block(sb);
623 unsigned int chunk_blocks;
624 int status;
625 handle_t *handle;
626
627 if (list_empty(&oinfo->dqi_chunk))
628 return ocfs2_local_quota_add_chunk(sb, type, offset);
629 /* Is the last chunk full? */
630 chunk = list_entry(oinfo->dqi_chunk.prev,
631 struct ocfs2_quota_chunk, qc_chunk);
632 chunk_blocks = oinfo->dqi_blocks -
633 ol_quota_chunk_block(sb, chunk->qc_num) - 1;
634 if (ol_chunk_blocks(sb) == chunk_blocks)
635 return ocfs2_local_quota_add_chunk(sb, type, offset);
636
637 /* We are protected by dqio_sem so no locking needed */
638 status = ocfs2_extend_no_holes(lqinode,
639 lqinode->i_size + sb->s_blocksize,
640 lqinode->i_size);
641 if (status < 0) {
642 mlog_errno(status);
643 goto out;
644 }
645 status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
646 lqinode->i_size + sb->s_blocksize);
647 if (status < 0) {
648 mlog_errno(status);
649 goto out;
650 }
651 handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
652 if (IS_ERR(handle)) {
653 status = PTR_ERR(handle);
654 mlog_errno(status);
655 goto out;
656 }
657 status = ocfs2_journal_access(handle, lqinode, chunk->qc_headerbh,
658 OCFS2_JOURNAL_ACCESS_WRITE);
659 if (status < 0) {
660 mlog_errno(status);
661 goto out_trans;
662 }
663
664 dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
665 lock_buffer(chunk->qc_headerbh);
666 le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
667 unlock_buffer(chunk->qc_headerbh);
668 status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
669 if (status < 0) {
670 mlog_errno(status);
671 goto out_trans;
672 }
673 oinfo->dqi_blocks++;
674 status = ocfs2_local_write_info(sb, type);
675 if (status < 0) {
676 mlog_errno(status);
677 goto out_trans;
678 }
679
680 status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
681 if (status < 0) {
682 mlog_errno(status);
683 goto out;
684 }
685 *offset = chunk_blocks * epb;
686 return chunk;
687out_trans:
688 ocfs2_commit_trans(OCFS2_SB(sb), handle);
689out:
690 return ERR_PTR(status);
691}
692
693void olq_alloc_dquot(struct buffer_head *bh, void *private)
694{
695 int *offset = private;
696 struct ocfs2_local_disk_chunk *dchunk;
697
698 dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
699 ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
700 le32_add_cpu(&dchunk->dqc_free, -1);
701}
702
703/* Create dquot in the local file for given id */
704static int ocfs2_create_local_dquot(struct dquot *dquot)
705{
706 struct super_block *sb = dquot->dq_sb;
707 int type = dquot->dq_type;
708 struct inode *lqinode = sb_dqopt(sb)->files[type];
709 struct ocfs2_quota_chunk *chunk;
710 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
711 int offset;
712 int status;
713
714 chunk = ocfs2_find_free_entry(sb, type, &offset);
715 if (!chunk) {
716 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
717 if (IS_ERR(chunk))
718 return PTR_ERR(chunk);
719 } else if (IS_ERR(chunk)) {
720 return PTR_ERR(chunk);
721 }
722 od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
723 od->dq_chunk = chunk;
724
725 /* Initialize dquot structure on disk */
726 status = ocfs2_local_write_dquot(dquot);
727 if (status < 0) {
728 mlog_errno(status);
729 goto out;
730 }
731
732 /* Mark structure as allocated */
733 status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
734 &offset);
735 if (status < 0) {
736 mlog_errno(status);
737 goto out;
738 }
739out:
740 return status;
741}
742
743/* Create entry in local file for dquot, load data from the global file */
744static int ocfs2_local_read_dquot(struct dquot *dquot)
745{
746 int status;
747
748 mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
749
750 status = ocfs2_global_read_dquot(dquot);
751 if (status < 0) {
752 mlog_errno(status);
753 goto out_err;
754 }
755
756 /* Now create entry in the local quota file */
757 status = ocfs2_create_local_dquot(dquot);
758 if (status < 0) {
759 mlog_errno(status);
760 goto out_err;
761 }
762 mlog_exit(0);
763 return 0;
764out_err:
765 mlog_exit(status);
766 return status;
767}
768
769/* Release dquot structure from local quota file. ocfs2_release_dquot() has
770 * already started a transaction and obtained exclusive lock for global
771 * quota file. */
772static int ocfs2_local_release_dquot(struct dquot *dquot)
773{
774 int status;
775 int type = dquot->dq_type;
776 struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
777 struct super_block *sb = dquot->dq_sb;
778 struct ocfs2_local_disk_chunk *dchunk;
779 int offset;
780 handle_t *handle = journal_current_handle();
781
782 BUG_ON(!handle);
783 /* First write all local changes to global file */
784 status = ocfs2_global_release_dquot(dquot);
785 if (status < 0) {
786 mlog_errno(status);
787 goto out;
788 }
789
790 status = ocfs2_journal_access(handle, sb_dqopt(sb)->files[type],
791 od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
792 if (status < 0) {
793 mlog_errno(status);
794 goto out;
795 }
796 offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
797 od->dq_local_off);
798 dchunk = (struct ocfs2_local_disk_chunk *)
799 (od->dq_chunk->qc_headerbh->b_data);
800 /* Mark structure as freed */
801 lock_buffer(od->dq_chunk->qc_headerbh);
802 ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
803 le32_add_cpu(&dchunk->dqc_free, 1);
804 unlock_buffer(od->dq_chunk->qc_headerbh);
805 status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
806 if (status < 0) {
807 mlog_errno(status);
808 goto out;
809 }
810 status = 0;
811out:
812 /* Clear the read bit so that next time someone uses this
813 * dquot he reads fresh info from disk and allocates local
814 * dquot structure */
815 clear_bit(DQ_READ_B, &dquot->dq_flags);
816 return status;
817}
818
819static struct quota_format_ops ocfs2_format_ops = {
820 .check_quota_file = ocfs2_local_check_quota_file,
821 .read_file_info = ocfs2_local_read_info,
822 .write_file_info = ocfs2_global_write_info,
823 .free_file_info = ocfs2_local_free_info,
824 .read_dqblk = ocfs2_local_read_dquot,
825 .commit_dqblk = ocfs2_local_write_dquot,
826 .release_dqblk = ocfs2_local_release_dquot,
827};
828
829struct quota_format_type ocfs2_quota_format = {
830 .qf_fmt_id = QFMT_OCFS2,
831 .qf_ops = &ocfs2_format_ops,
832 .qf_owner = THIS_MODULE
833};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 15:22:27 -0500