~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/ocfs2/quota_local.c

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.10 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.83 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.153 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.200 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.200 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.76 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  Implementation of operations over local quota file
  3  */
  4 
  5 #include <linux/fs.h>
  6 #include <linux/slab.h>
  7 #include <linux/quota.h>
  8 #include <linux/quotaops.h>
  9 #include <linux/module.h>
 10 
 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 #include "uptodate.h"
 24 #include "super.h"
 25 #include "ocfs2_trace.h"
 26 
 27 /* Number of local quota structures per block */
 28 static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
 29 {
 30         return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
 31                 sizeof(struct ocfs2_local_disk_dqblk));
 32 }
 33 
 34 /* Number of blocks with entries in one chunk */
 35 static inline unsigned int ol_chunk_blocks(struct super_block *sb)
 36 {
 37         return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
 38                  OCFS2_QBLK_RESERVED_SPACE) << 3) /
 39                ol_quota_entries_per_block(sb);
 40 }
 41 
 42 /* Number of entries in a chunk bitmap */
 43 static unsigned int ol_chunk_entries(struct super_block *sb)
 44 {
 45         return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
 46 }
 47 
 48 /* Offset of the chunk in quota file */
 49 static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
 50 {
 51         /* 1 block for local quota file info, 1 block per chunk for chunk info */
 52         return 1 + (ol_chunk_blocks(sb) + 1) * c;
 53 }
 54 
 55 static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
 56 {
 57         int epb = ol_quota_entries_per_block(sb);
 58 
 59         return ol_quota_chunk_block(sb, c) + 1 + off / epb;
 60 }
 61 
 62 static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
 63 {
 64         int epb = ol_quota_entries_per_block(sb);
 65 
 66         return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
 67 }
 68 
 69 /* Offset of the dquot structure in the quota file */
 70 static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
 71 {
 72         return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
 73                ol_dqblk_block_off(sb, c, off);
 74 }
 75 
 76 /* Compute block number from given offset */
 77 static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
 78 {
 79         return off >> sb->s_blocksize_bits;
 80 }
 81 
 82 static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
 83 {
 84         return off & ((1 << sb->s_blocksize_bits) - 1);
 85 }
 86 
 87 /* Compute offset in the chunk of a structure with the given offset */
 88 static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
 89 {
 90         int epb = ol_quota_entries_per_block(sb);
 91 
 92         return ((off >> sb->s_blocksize_bits) -
 93                         ol_quota_chunk_block(sb, c) - 1) * epb
 94                + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
 95                  sizeof(struct ocfs2_local_disk_dqblk);
 96 }
 97 
 98 /* Write bufferhead into the fs */
 99 static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
100                 void (*modify)(struct buffer_head *, void *), void *private)
101 {
102         struct super_block *sb = inode->i_sb;
103         handle_t *handle;
104         int status;
105 
106         handle = ocfs2_start_trans(OCFS2_SB(sb),
107                                    OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
108         if (IS_ERR(handle)) {
109                 status = PTR_ERR(handle);
110                 mlog_errno(status);
111                 return status;
112         }
113         status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
114                                          OCFS2_JOURNAL_ACCESS_WRITE);
115         if (status < 0) {
116                 mlog_errno(status);
117                 ocfs2_commit_trans(OCFS2_SB(sb), handle);
118                 return status;
119         }
120         lock_buffer(bh);
121         modify(bh, private);
122         unlock_buffer(bh);
123         ocfs2_journal_dirty(handle, bh);
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 /*
134  * Read quota block from a given logical offset.
135  *
136  * This function acquires ip_alloc_sem and thus it must not be called with a
137  * transaction started.
138  */
139 static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
140                                   struct buffer_head **bh)
141 {
142         int rc = 0;
143         struct buffer_head *tmp = *bh;
144 
145         if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
146                 ocfs2_error(inode->i_sb,
147                             "Quota file %llu is probably corrupted! Requested "
148                             "to read block %Lu but file has size only %Lu\n",
149                             (unsigned long long)OCFS2_I(inode)->ip_blkno,
150                             (unsigned long long)v_block,
151                             (unsigned long long)i_size_read(inode));
152                 return -EIO;
153         }
154         rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
155                                     ocfs2_validate_quota_block);
156         if (rc)
157                 mlog_errno(rc);
158 
159         /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
160         if (!rc && !*bh)
161                 *bh = tmp;
162 
163         return rc;
164 }
165 
166 /* Check whether we understand format of quota files */
167 static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
168 {
169         unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
170         unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
171         unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
172         unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
173         unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
174                                         GROUP_QUOTA_SYSTEM_INODE };
175         struct buffer_head *bh = NULL;
176         struct inode *linode = sb_dqopt(sb)->files[type];
177         struct inode *ginode = NULL;
178         struct ocfs2_disk_dqheader *dqhead;
179         int status, ret = 0;
180 
181         /* First check whether we understand local quota file */
182         status = ocfs2_read_quota_block(linode, 0, &bh);
183         if (status) {
184                 mlog_errno(status);
185                 mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
186                         type);
187                 goto out_err;
188         }
189         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
190         if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
191                 mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
192                         " type=%d\n", le32_to_cpu(dqhead->dqh_magic),
193                         lmagics[type], type);
194                 goto out_err;
195         }
196         if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
197                 mlog(ML_ERROR, "quota file version does not match (%u != %u),"
198                         " type=%d\n", le32_to_cpu(dqhead->dqh_version),
199                         lversions[type], type);
200                 goto out_err;
201         }
202         brelse(bh);
203         bh = NULL;
204 
205         /* Next check whether we understand global quota file */
206         ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
207                                                 OCFS2_INVALID_SLOT);
208         if (!ginode) {
209                 mlog(ML_ERROR, "cannot get global quota file inode "
210                                 "(type=%d)\n", type);
211                 goto out_err;
212         }
213         /* Since the header is read only, we don't care about locking */
214         status = ocfs2_read_quota_block(ginode, 0, &bh);
215         if (status) {
216                 mlog_errno(status);
217                 mlog(ML_ERROR, "failed to read global quota file header "
218                                 "(type=%d)\n", type);
219                 goto out_err;
220         }
221         dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
222         if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
223                 mlog(ML_ERROR, "global quota file magic does not match "
224                         "(%u != %u), type=%d\n",
225                         le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
226                 goto out_err;
227         }
228         if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
229                 mlog(ML_ERROR, "global quota file version does not match "
230                         "(%u != %u), type=%d\n",
231                         le32_to_cpu(dqhead->dqh_version), gversions[type],
232                         type);
233                 goto out_err;
234         }
235 
236         ret = 1;
237 out_err:
238         brelse(bh);
239         iput(ginode);
240         return ret;
241 }
242 
243 /* Release given list of quota file chunks */
244 static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
245 {
246         struct ocfs2_quota_chunk *pos, *next;
247 
248         list_for_each_entry_safe(pos, next, head, qc_chunk) {
249                 list_del(&pos->qc_chunk);
250                 brelse(pos->qc_headerbh);
251                 kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
252         }
253 }
254 
255 /* Load quota bitmaps into memory */
256 static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
257                         struct ocfs2_local_disk_dqinfo *ldinfo,
258                         struct list_head *head)
259 {
260         struct ocfs2_quota_chunk *newchunk;
261         int i, status;
262 
263         INIT_LIST_HEAD(head);
264         for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
265                 newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
266                 if (!newchunk) {
267                         ocfs2_release_local_quota_bitmaps(head);
268                         return -ENOMEM;
269                 }
270                 newchunk->qc_num = i;
271                 newchunk->qc_headerbh = NULL;
272                 status = ocfs2_read_quota_block(inode,
273                                 ol_quota_chunk_block(inode->i_sb, i),
274                                 &newchunk->qc_headerbh);
275                 if (status) {
276                         mlog_errno(status);
277                         kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
278                         ocfs2_release_local_quota_bitmaps(head);
279                         return status;
280                 }
281                 list_add_tail(&newchunk->qc_chunk, head);
282         }
283         return 0;
284 }
285 
286 static void olq_update_info(struct buffer_head *bh, void *private)
287 {
288         struct mem_dqinfo *info = private;
289         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
290         struct ocfs2_local_disk_dqinfo *ldinfo;
291 
292         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
293                                                 OCFS2_LOCAL_INFO_OFF);
294         spin_lock(&dq_data_lock);
295         ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
296         ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
297         ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
298         spin_unlock(&dq_data_lock);
299 }
300 
301 static int ocfs2_add_recovery_chunk(struct super_block *sb,
302                                     struct ocfs2_local_disk_chunk *dchunk,
303                                     int chunk,
304                                     struct list_head *head)
305 {
306         struct ocfs2_recovery_chunk *rc;
307 
308         rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
309         if (!rc)
310                 return -ENOMEM;
311         rc->rc_chunk = chunk;
312         rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
313         if (!rc->rc_bitmap) {
314                 kfree(rc);
315                 return -ENOMEM;
316         }
317         memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
318                (ol_chunk_entries(sb) + 7) >> 3);
319         list_add_tail(&rc->rc_list, head);
320         return 0;
321 }
322 
323 static void free_recovery_list(struct list_head *head)
324 {
325         struct ocfs2_recovery_chunk *next;
326         struct ocfs2_recovery_chunk *rchunk;
327 
328         list_for_each_entry_safe(rchunk, next, head, rc_list) {
329                 list_del(&rchunk->rc_list);
330                 kfree(rchunk->rc_bitmap);
331                 kfree(rchunk);
332         }
333 }
334 
335 void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
336 {
337         int type;
338 
339         for (type = 0; type < MAXQUOTAS; type++)
340                 free_recovery_list(&(rec->r_list[type]));
341         kfree(rec);
342 }
343 
344 /* Load entries in our quota file we have to recover*/
345 static int ocfs2_recovery_load_quota(struct inode *lqinode,
346                                      struct ocfs2_local_disk_dqinfo *ldinfo,
347                                      int type,
348                                      struct list_head *head)
349 {
350         struct super_block *sb = lqinode->i_sb;
351         struct buffer_head *hbh;
352         struct ocfs2_local_disk_chunk *dchunk;
353         int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
354         int status = 0;
355 
356         for (i = 0; i < chunks; i++) {
357                 hbh = NULL;
358                 status = ocfs2_read_quota_block(lqinode,
359                                                 ol_quota_chunk_block(sb, i),
360                                                 &hbh);
361                 if (status) {
362                         mlog_errno(status);
363                         break;
364                 }
365                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
366                 if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
367                         status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
368                 brelse(hbh);
369                 if (status < 0)
370                         break;
371         }
372         if (status < 0)
373                 free_recovery_list(head);
374         return status;
375 }
376 
377 static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
378 {
379         int type;
380         struct ocfs2_quota_recovery *rec;
381 
382         rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
383         if (!rec)
384                 return NULL;
385         for (type = 0; type < MAXQUOTAS; type++)
386                 INIT_LIST_HEAD(&(rec->r_list[type]));
387         return rec;
388 }
389 
390 /* Load information we need for quota recovery into memory */
391 struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
392                                                 struct ocfs2_super *osb,
393                                                 int slot_num)
394 {
395         unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
396                                             OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
397         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
398                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
399         struct super_block *sb = osb->sb;
400         struct ocfs2_local_disk_dqinfo *ldinfo;
401         struct inode *lqinode;
402         struct buffer_head *bh;
403         int type;
404         int status = 0;
405         struct ocfs2_quota_recovery *rec;
406 
407         printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
408                "slot %u\n", osb->dev_str, slot_num);
409 
410         rec = ocfs2_alloc_quota_recovery();
411         if (!rec)
412                 return ERR_PTR(-ENOMEM);
413         /* First init... */
414 
415         for (type = 0; type < MAXQUOTAS; type++) {
416                 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
417                         continue;
418                 /* At this point, journal of the slot is already replayed so
419                  * we can trust metadata and data of the quota file */
420                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
421                 if (!lqinode) {
422                         status = -ENOENT;
423                         goto out;
424                 }
425                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
426                                                OCFS2_META_LOCK_RECOVERY);
427                 if (status < 0) {
428                         mlog_errno(status);
429                         goto out_put;
430                 }
431                 /* Now read local header */
432                 bh = NULL;
433                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
434                 if (status) {
435                         mlog_errno(status);
436                         mlog(ML_ERROR, "failed to read quota file info header "
437                                 "(slot=%d type=%d)\n", slot_num, type);
438                         goto out_lock;
439                 }
440                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
441                                                         OCFS2_LOCAL_INFO_OFF);
442                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
443                                                    &rec->r_list[type]);
444                 brelse(bh);
445 out_lock:
446                 ocfs2_inode_unlock(lqinode, 1);
447 out_put:
448                 iput(lqinode);
449                 if (status < 0)
450                         break;
451         }
452 out:
453         if (status < 0) {
454                 ocfs2_free_quota_recovery(rec);
455                 rec = ERR_PTR(status);
456         }
457         return rec;
458 }
459 
460 /* Sync changes in local quota file into global quota file and
461  * reinitialize local quota file.
462  * The function expects local quota file to be already locked and
463  * dqonoff_mutex locked. */
464 static int ocfs2_recover_local_quota_file(struct inode *lqinode,
465                                           int type,
466                                           struct ocfs2_quota_recovery *rec)
467 {
468         struct super_block *sb = lqinode->i_sb;
469         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
470         struct ocfs2_local_disk_chunk *dchunk;
471         struct ocfs2_local_disk_dqblk *dqblk;
472         struct dquot *dquot;
473         handle_t *handle;
474         struct buffer_head *hbh = NULL, *qbh = NULL;
475         int status = 0;
476         int bit, chunk;
477         struct ocfs2_recovery_chunk *rchunk, *next;
478         qsize_t spacechange, inodechange;
479 
480         trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
481 
482         list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
483                 chunk = rchunk->rc_chunk;
484                 hbh = NULL;
485                 status = ocfs2_read_quota_block(lqinode,
486                                                 ol_quota_chunk_block(sb, chunk),
487                                                 &hbh);
488                 if (status) {
489                         mlog_errno(status);
490                         break;
491                 }
492                 dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
493                 for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
494                         qbh = NULL;
495                         status = ocfs2_read_quota_block(lqinode,
496                                                 ol_dqblk_block(sb, chunk, bit),
497                                                 &qbh);
498                         if (status) {
499                                 mlog_errno(status);
500                                 break;
501                         }
502                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
503                                 ol_dqblk_block_off(sb, chunk, bit));
504                         dquot = dqget(sb,
505                                       make_kqid(&init_user_ns, type,
506                                                 le64_to_cpu(dqblk->dqb_id)));
507                         if (!dquot) {
508                                 status = -EIO;
509                                 mlog(ML_ERROR, "Failed to get quota structure "
510                                      "for id %u, type %d. Cannot finish quota "
511                                      "file recovery.\n",
512                                      (unsigned)le64_to_cpu(dqblk->dqb_id),
513                                      type);
514                                 goto out_put_bh;
515                         }
516                         status = ocfs2_lock_global_qf(oinfo, 1);
517                         if (status < 0) {
518                                 mlog_errno(status);
519                                 goto out_put_dquot;
520                         }
521 
522                         handle = ocfs2_start_trans(OCFS2_SB(sb),
523                                                    OCFS2_QSYNC_CREDITS);
524                         if (IS_ERR(handle)) {
525                                 status = PTR_ERR(handle);
526                                 mlog_errno(status);
527                                 goto out_drop_lock;
528                         }
529                         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
530                         spin_lock(&dq_data_lock);
531                         /* Add usage from quota entry into quota changes
532                          * of our node. Auxiliary variables are important
533                          * due to signedness */
534                         spacechange = le64_to_cpu(dqblk->dqb_spacemod);
535                         inodechange = le64_to_cpu(dqblk->dqb_inodemod);
536                         dquot->dq_dqb.dqb_curspace += spacechange;
537                         dquot->dq_dqb.dqb_curinodes += inodechange;
538                         spin_unlock(&dq_data_lock);
539                         /* We want to drop reference held by the crashed
540                          * node. Since we have our own reference we know
541                          * global structure actually won't be freed. */
542                         status = ocfs2_global_release_dquot(dquot);
543                         if (status < 0) {
544                                 mlog_errno(status);
545                                 goto out_commit;
546                         }
547                         /* Release local quota file entry */
548                         status = ocfs2_journal_access_dq(handle,
549                                         INODE_CACHE(lqinode),
550                                         qbh, OCFS2_JOURNAL_ACCESS_WRITE);
551                         if (status < 0) {
552                                 mlog_errno(status);
553                                 goto out_commit;
554                         }
555                         lock_buffer(qbh);
556                         WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
557                         ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
558                         le32_add_cpu(&dchunk->dqc_free, 1);
559                         unlock_buffer(qbh);
560                         ocfs2_journal_dirty(handle, qbh);
561 out_commit:
562                         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
563                         ocfs2_commit_trans(OCFS2_SB(sb), handle);
564 out_drop_lock:
565                         ocfs2_unlock_global_qf(oinfo, 1);
566 out_put_dquot:
567                         dqput(dquot);
568 out_put_bh:
569                         brelse(qbh);
570                         if (status < 0)
571                                 break;
572                 }
573                 brelse(hbh);
574                 list_del(&rchunk->rc_list);
575                 kfree(rchunk->rc_bitmap);
576                 kfree(rchunk);
577                 if (status < 0)
578                         break;
579         }
580         if (status < 0)
581                 free_recovery_list(&(rec->r_list[type]));
582         if (status)
583                 mlog_errno(status);
584         return status;
585 }
586 
587 /* Recover local quota files for given node different from us */
588 int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
589                                 struct ocfs2_quota_recovery *rec,
590                                 int slot_num)
591 {
592         unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
593                                         LOCAL_GROUP_QUOTA_SYSTEM_INODE };
594         struct super_block *sb = osb->sb;
595         struct ocfs2_local_disk_dqinfo *ldinfo;
596         struct buffer_head *bh;
597         handle_t *handle;
598         int type;
599         int status = 0;
600         struct inode *lqinode;
601         unsigned int flags;
602 
603         printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
604                "slot %u\n", osb->dev_str, slot_num);
605 
606         mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
607         for (type = 0; type < MAXQUOTAS; type++) {
608                 if (list_empty(&(rec->r_list[type])))
609                         continue;
610                 trace_ocfs2_finish_quota_recovery(slot_num);
611                 lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
612                 if (!lqinode) {
613                         status = -ENOENT;
614                         goto out;
615                 }
616                 status = ocfs2_inode_lock_full(lqinode, NULL, 1,
617                                                        OCFS2_META_LOCK_NOQUEUE);
618                 /* Someone else is holding the lock? Then he must be
619                  * doing the recovery. Just skip the file... */
620                 if (status == -EAGAIN) {
621                         printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
622                                "device (%s) for slot %d because quota file is "
623                                "locked.\n", osb->dev_str, slot_num);
624                         status = 0;
625                         goto out_put;
626                 } else if (status < 0) {
627                         mlog_errno(status);
628                         goto out_put;
629                 }
630                 /* Now read local header */
631                 bh = NULL;
632                 status = ocfs2_read_quota_block(lqinode, 0, &bh);
633                 if (status) {
634                         mlog_errno(status);
635                         mlog(ML_ERROR, "failed to read quota file info header "
636                                 "(slot=%d type=%d)\n", slot_num, type);
637                         goto out_lock;
638                 }
639                 ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
640                                                         OCFS2_LOCAL_INFO_OFF);
641                 /* Is recovery still needed? */
642                 flags = le32_to_cpu(ldinfo->dqi_flags);
643                 if (!(flags & OLQF_CLEAN))
644                         status = ocfs2_recover_local_quota_file(lqinode,
645                                                                 type,
646                                                                 rec);
647                 /* We don't want to mark file as clean when it is actually
648                  * active */
649                 if (slot_num == osb->slot_num)
650                         goto out_bh;
651                 /* Mark quota file as clean if we are recovering quota file of
652                  * some other node. */
653                 handle = ocfs2_start_trans(osb,
654                                            OCFS2_LOCAL_QINFO_WRITE_CREDITS);
655                 if (IS_ERR(handle)) {
656                         status = PTR_ERR(handle);
657                         mlog_errno(status);
658                         goto out_bh;
659                 }
660                 status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
661                                                  bh,
662                                                  OCFS2_JOURNAL_ACCESS_WRITE);
663                 if (status < 0) {
664                         mlog_errno(status);
665                         goto out_trans;
666                 }
667                 lock_buffer(bh);
668                 ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
669                 unlock_buffer(bh);
670                 ocfs2_journal_dirty(handle, bh);
671 out_trans:
672                 ocfs2_commit_trans(osb, handle);
673 out_bh:
674                 brelse(bh);
675 out_lock:
676                 ocfs2_inode_unlock(lqinode, 1);
677 out_put:
678                 iput(lqinode);
679                 if (status < 0)
680                         break;
681         }
682 out:
683         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
684         kfree(rec);
685         return status;
686 }
687 
688 /* Read information header from quota file */
689 static int ocfs2_local_read_info(struct super_block *sb, int type)
690 {
691         struct ocfs2_local_disk_dqinfo *ldinfo;
692         struct mem_dqinfo *info = sb_dqinfo(sb, type);
693         struct ocfs2_mem_dqinfo *oinfo;
694         struct inode *lqinode = sb_dqopt(sb)->files[type];
695         int status;
696         struct buffer_head *bh = NULL;
697         struct ocfs2_quota_recovery *rec;
698         int locked = 0;
699 
700         /* We don't need the lock and we have to acquire quota file locks
701          * which will later depend on this lock */
702         mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
703         info->dqi_maxblimit = 0x7fffffffffffffffLL;
704         info->dqi_maxilimit = 0x7fffffffffffffffLL;
705         oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
706         if (!oinfo) {
707                 mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
708                                " info.");
709                 goto out_err;
710         }
711         info->dqi_priv = oinfo;
712         oinfo->dqi_type = type;
713         INIT_LIST_HEAD(&oinfo->dqi_chunk);
714         oinfo->dqi_rec = NULL;
715         oinfo->dqi_lqi_bh = NULL;
716         oinfo->dqi_libh = NULL;
717 
718         status = ocfs2_global_read_info(sb, type);
719         if (status < 0)
720                 goto out_err;
721 
722         status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
723         if (status < 0) {
724                 mlog_errno(status);
725                 goto out_err;
726         }
727         locked = 1;
728 
729         /* Now read local header */
730         status = ocfs2_read_quota_block(lqinode, 0, &bh);
731         if (status) {
732                 mlog_errno(status);
733                 mlog(ML_ERROR, "failed to read quota file info header "
734                         "(type=%d)\n", type);
735                 goto out_err;
736         }
737         ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
738                                                 OCFS2_LOCAL_INFO_OFF);
739         info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
740         oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
741         oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
742         oinfo->dqi_libh = bh;
743 
744         /* We crashed when using local quota file? */
745         if (!(info->dqi_flags & OLQF_CLEAN)) {
746                 rec = OCFS2_SB(sb)->quota_rec;
747                 if (!rec) {
748                         rec = ocfs2_alloc_quota_recovery();
749                         if (!rec) {
750                                 status = -ENOMEM;
751                                 mlog_errno(status);
752                                 goto out_err;
753                         }
754                         OCFS2_SB(sb)->quota_rec = rec;
755                 }
756 
757                 status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
758                                                    &rec->r_list[type]);
759                 if (status < 0) {
760                         mlog_errno(status);
761                         goto out_err;
762                 }
763         }
764 
765         status = ocfs2_load_local_quota_bitmaps(lqinode,
766                                                 ldinfo,
767                                                 &oinfo->dqi_chunk);
768         if (status < 0) {
769                 mlog_errno(status);
770                 goto out_err;
771         }
772 
773         /* Now mark quota file as used */
774         info->dqi_flags &= ~OLQF_CLEAN;
775         status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
776         if (status < 0) {
777                 mlog_errno(status);
778                 goto out_err;
779         }
780 
781         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
782         return 0;
783 out_err:
784         if (oinfo) {
785                 iput(oinfo->dqi_gqinode);
786                 ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
787                 ocfs2_lock_res_free(&oinfo->dqi_gqlock);
788                 brelse(oinfo->dqi_lqi_bh);
789                 if (locked)
790                         ocfs2_inode_unlock(lqinode, 1);
791                 ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
792                 kfree(oinfo);
793         }
794         brelse(bh);
795         mutex_lock(&sb_dqopt(sb)->dqio_mutex);
796         return -1;
797 }
798 
799 /* Write local info to quota file */
800 static int ocfs2_local_write_info(struct super_block *sb, int type)
801 {
802         struct mem_dqinfo *info = sb_dqinfo(sb, type);
803         struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
804                                                 ->dqi_libh;
805         int status;
806 
807         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
808                                  info);
809         if (status < 0) {
810                 mlog_errno(status);
811                 return -1;
812         }
813 
814         return 0;
815 }
816 
817 /* Release info from memory */
818 static int ocfs2_local_free_info(struct super_block *sb, int type)
819 {
820         struct mem_dqinfo *info = sb_dqinfo(sb, type);
821         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
822         struct ocfs2_quota_chunk *chunk;
823         struct ocfs2_local_disk_chunk *dchunk;
824         int mark_clean = 1, len;
825         int status;
826 
827         iput(oinfo->dqi_gqinode);
828         ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
829         ocfs2_lock_res_free(&oinfo->dqi_gqlock);
830         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
831                 dchunk = (struct ocfs2_local_disk_chunk *)
832                                         (chunk->qc_headerbh->b_data);
833                 if (chunk->qc_num < oinfo->dqi_chunks - 1) {
834                         len = ol_chunk_entries(sb);
835                 } else {
836                         len = (oinfo->dqi_blocks -
837                                ol_quota_chunk_block(sb, chunk->qc_num) - 1)
838                               * ol_quota_entries_per_block(sb);
839                 }
840                 /* Not all entries free? Bug! */
841                 if (le32_to_cpu(dchunk->dqc_free) != len) {
842                         mlog(ML_ERROR, "releasing quota file with used "
843                                         "entries (type=%d)\n", type);
844                         mark_clean = 0;
845                 }
846         }
847         ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
848 
849         /* dqonoff_mutex protects us against racing with recovery thread... */
850         if (oinfo->dqi_rec) {
851                 ocfs2_free_quota_recovery(oinfo->dqi_rec);
852                 mark_clean = 0;
853         }
854 
855         if (!mark_clean)
856                 goto out;
857 
858         /* Mark local file as clean */
859         info->dqi_flags |= OLQF_CLEAN;
860         status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
861                                  oinfo->dqi_libh,
862                                  olq_update_info,
863                                  info);
864         if (status < 0) {
865                 mlog_errno(status);
866                 goto out;
867         }
868 
869 out:
870         ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
871         brelse(oinfo->dqi_libh);
872         brelse(oinfo->dqi_lqi_bh);
873         kfree(oinfo);
874         return 0;
875 }
876 
877 static void olq_set_dquot(struct buffer_head *bh, void *private)
878 {
879         struct ocfs2_dquot *od = private;
880         struct ocfs2_local_disk_dqblk *dqblk;
881         struct super_block *sb = od->dq_dquot.dq_sb;
882 
883         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
884                 + ol_dqblk_block_offset(sb, od->dq_local_off));
885 
886         dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
887                                               od->dq_dquot.dq_id));
888         spin_lock(&dq_data_lock);
889         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
890                                           od->dq_origspace);
891         dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
892                                           od->dq_originodes);
893         spin_unlock(&dq_data_lock);
894         trace_olq_set_dquot(
895                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
896                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
897                 from_kqid(&init_user_ns, od->dq_dquot.dq_id));
898 }
899 
900 /* Write dquot to local quota file */
901 int ocfs2_local_write_dquot(struct dquot *dquot)
902 {
903         struct super_block *sb = dquot->dq_sb;
904         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
905         struct buffer_head *bh;
906         struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
907         int status;
908 
909         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
910                                              &bh);
911         if (status) {
912                 mlog_errno(status);
913                 goto out;
914         }
915         status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
916         if (status < 0) {
917                 mlog_errno(status);
918                 goto out;
919         }
920 out:
921         brelse(bh);
922         return status;
923 }
924 
925 /* Find free entry in local quota file */
926 static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
927                                                        int type,
928                                                        int *offset)
929 {
930         struct mem_dqinfo *info = sb_dqinfo(sb, type);
931         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
932         struct ocfs2_quota_chunk *chunk;
933         struct ocfs2_local_disk_chunk *dchunk;
934         int found = 0, len;
935 
936         list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
937                 dchunk = (struct ocfs2_local_disk_chunk *)
938                                                 chunk->qc_headerbh->b_data;
939                 if (le32_to_cpu(dchunk->dqc_free) > 0) {
940                         found = 1;
941                         break;
942                 }
943         }
944         if (!found)
945                 return NULL;
946 
947         if (chunk->qc_num < oinfo->dqi_chunks - 1) {
948                 len = ol_chunk_entries(sb);
949         } else {
950                 len = (oinfo->dqi_blocks -
951                        ol_quota_chunk_block(sb, chunk->qc_num) - 1)
952                       * ol_quota_entries_per_block(sb);
953         }
954 
955         found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
956         /* We failed? */
957         if (found == len) {
958                 mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
959                      " entries free (type=%d)\n", chunk->qc_num,
960                      le32_to_cpu(dchunk->dqc_free), type);
961                 return ERR_PTR(-EIO);
962         }
963         *offset = found;
964         return chunk;
965 }
966 
967 /* Add new chunk to the local quota file */
968 static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
969                                                         struct super_block *sb,
970                                                         int type,
971                                                         int *offset)
972 {
973         struct mem_dqinfo *info = sb_dqinfo(sb, type);
974         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
975         struct inode *lqinode = sb_dqopt(sb)->files[type];
976         struct ocfs2_quota_chunk *chunk = NULL;
977         struct ocfs2_local_disk_chunk *dchunk;
978         int status;
979         handle_t *handle;
980         struct buffer_head *bh = NULL, *dbh = NULL;
981         u64 p_blkno;
982 
983         /* We are protected by dqio_sem so no locking needed */
984         status = ocfs2_extend_no_holes(lqinode, NULL,
985                                        lqinode->i_size + 2 * sb->s_blocksize,
986                                        lqinode->i_size);
987         if (status < 0) {
988                 mlog_errno(status);
989                 goto out;
990         }
991         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
992                                           lqinode->i_size + 2 * sb->s_blocksize);
993         if (status < 0) {
994                 mlog_errno(status);
995                 goto out;
996         }
997 
998         chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
999         if (!chunk) {
1000                 status = -ENOMEM;
1001                 mlog_errno(status);
1002                 goto out;
1003         }
1004         /* Local quota info and two new blocks we initialize */
1005         handle = ocfs2_start_trans(OCFS2_SB(sb),
1006                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1007                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1008         if (IS_ERR(handle)) {
1009                 status = PTR_ERR(handle);
1010                 mlog_errno(status);
1011                 goto out;
1012         }
1013 
1014         /* Initialize chunk header */
1015         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1016                                              &p_blkno, NULL, NULL);
1017         if (status < 0) {
1018                 mlog_errno(status);
1019                 goto out_trans;
1020         }
1021         bh = sb_getblk(sb, p_blkno);
1022         if (!bh) {
1023                 status = -ENOMEM;
1024                 mlog_errno(status);
1025                 goto out_trans;
1026         }
1027         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1028         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1029         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1030                                          OCFS2_JOURNAL_ACCESS_CREATE);
1031         if (status < 0) {
1032                 mlog_errno(status);
1033                 goto out_trans;
1034         }
1035         lock_buffer(bh);
1036         dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1037         memset(dchunk->dqc_bitmap, 0,
1038                sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1039                OCFS2_QBLK_RESERVED_SPACE);
1040         unlock_buffer(bh);
1041         ocfs2_journal_dirty(handle, bh);
1042 
1043         /* Initialize new block with structures */
1044         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1045                                              &p_blkno, NULL, NULL);
1046         if (status < 0) {
1047                 mlog_errno(status);
1048                 goto out_trans;
1049         }
1050         dbh = sb_getblk(sb, p_blkno);
1051         if (!dbh) {
1052                 status = -ENOMEM;
1053                 mlog_errno(status);
1054                 goto out_trans;
1055         }
1056         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1057         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1058                                          OCFS2_JOURNAL_ACCESS_CREATE);
1059         if (status < 0) {
1060                 mlog_errno(status);
1061                 goto out_trans;
1062         }
1063         lock_buffer(dbh);
1064         memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1065         unlock_buffer(dbh);
1066         ocfs2_journal_dirty(handle, dbh);
1067 
1068         /* Update local quotafile info */
1069         oinfo->dqi_blocks += 2;
1070         oinfo->dqi_chunks++;
1071         status = ocfs2_local_write_info(sb, type);
1072         if (status < 0) {
1073                 mlog_errno(status);
1074                 goto out_trans;
1075         }
1076         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1077         if (status < 0) {
1078                 mlog_errno(status);
1079                 goto out;
1080         }
1081 
1082         list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1083         chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1084                                    struct ocfs2_quota_chunk,
1085                                    qc_chunk)->qc_num + 1;
1086         chunk->qc_headerbh = bh;
1087         *offset = 0;
1088         return chunk;
1089 out_trans:
1090         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1091 out:
1092         brelse(bh);
1093         brelse(dbh);
1094         kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1095         return ERR_PTR(status);
1096 }
1097 
1098 /* Find free entry in local quota file */
1099 static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1100                                                        struct super_block *sb,
1101                                                        int type,
1102                                                        int *offset)
1103 {
1104         struct mem_dqinfo *info = sb_dqinfo(sb, type);
1105         struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1106         struct ocfs2_quota_chunk *chunk;
1107         struct inode *lqinode = sb_dqopt(sb)->files[type];
1108         struct ocfs2_local_disk_chunk *dchunk;
1109         int epb = ol_quota_entries_per_block(sb);
1110         unsigned int chunk_blocks;
1111         struct buffer_head *bh;
1112         u64 p_blkno;
1113         int status;
1114         handle_t *handle;
1115 
1116         if (list_empty(&oinfo->dqi_chunk))
1117                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1118         /* Is the last chunk full? */
1119         chunk = list_entry(oinfo->dqi_chunk.prev,
1120                         struct ocfs2_quota_chunk, qc_chunk);
1121         chunk_blocks = oinfo->dqi_blocks -
1122                         ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1123         if (ol_chunk_blocks(sb) == chunk_blocks)
1124                 return ocfs2_local_quota_add_chunk(sb, type, offset);
1125 
1126         /* We are protected by dqio_sem so no locking needed */
1127         status = ocfs2_extend_no_holes(lqinode, NULL,
1128                                        lqinode->i_size + sb->s_blocksize,
1129                                        lqinode->i_size);
1130         if (status < 0) {
1131                 mlog_errno(status);
1132                 goto out;
1133         }
1134         status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1135                                           lqinode->i_size + sb->s_blocksize);
1136         if (status < 0) {
1137                 mlog_errno(status);
1138                 goto out;
1139         }
1140 
1141         /* Get buffer from the just added block */
1142         status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1143                                              &p_blkno, NULL, NULL);
1144         if (status < 0) {
1145                 mlog_errno(status);
1146                 goto out;
1147         }
1148         bh = sb_getblk(sb, p_blkno);
1149         if (!bh) {
1150                 status = -ENOMEM;
1151                 mlog_errno(status);
1152                 goto out;
1153         }
1154         ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1155 
1156         /* Local quota info, chunk header and the new block we initialize */
1157         handle = ocfs2_start_trans(OCFS2_SB(sb),
1158                         OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1159                         2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1160         if (IS_ERR(handle)) {
1161                 status = PTR_ERR(handle);
1162                 mlog_errno(status);
1163                 goto out;
1164         }
1165         /* Zero created block */
1166         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1167                                  OCFS2_JOURNAL_ACCESS_CREATE);
1168         if (status < 0) {
1169                 mlog_errno(status);
1170                 goto out_trans;
1171         }
1172         lock_buffer(bh);
1173         memset(bh->b_data, 0, sb->s_blocksize);
1174         unlock_buffer(bh);
1175         ocfs2_journal_dirty(handle, bh);
1176 
1177         /* Update chunk header */
1178         status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1179                                          chunk->qc_headerbh,
1180                                  OCFS2_JOURNAL_ACCESS_WRITE);
1181         if (status < 0) {
1182                 mlog_errno(status);
1183                 goto out_trans;
1184         }
1185 
1186         dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1187         lock_buffer(chunk->qc_headerbh);
1188         le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1189         unlock_buffer(chunk->qc_headerbh);
1190         ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1191 
1192         /* Update file header */
1193         oinfo->dqi_blocks++;
1194         status = ocfs2_local_write_info(sb, type);
1195         if (status < 0) {
1196                 mlog_errno(status);
1197                 goto out_trans;
1198         }
1199 
1200         status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1201         if (status < 0) {
1202                 mlog_errno(status);
1203                 goto out;
1204         }
1205         *offset = chunk_blocks * epb;
1206         return chunk;
1207 out_trans:
1208         ocfs2_commit_trans(OCFS2_SB(sb), handle);
1209 out:
1210         return ERR_PTR(status);
1211 }
1212 
1213 static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1214 {
1215         int *offset = private;
1216         struct ocfs2_local_disk_chunk *dchunk;
1217 
1218         dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1219         ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1220         le32_add_cpu(&dchunk->dqc_free, -1);
1221 }
1222 
1223 /* Create dquot in the local file for given id */
1224 int ocfs2_create_local_dquot(struct dquot *dquot)
1225 {
1226         struct super_block *sb = dquot->dq_sb;
1227         int type = dquot->dq_id.type;
1228         struct inode *lqinode = sb_dqopt(sb)->files[type];
1229         struct ocfs2_quota_chunk *chunk;
1230         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1231         int offset;
1232         int status;
1233         u64 pcount;
1234 
1235         down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1236         chunk = ocfs2_find_free_entry(sb, type, &offset);
1237         if (!chunk) {
1238                 chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1239                 if (IS_ERR(chunk)) {
1240                         status = PTR_ERR(chunk);
1241                         goto out;
1242                 }
1243         } else if (IS_ERR(chunk)) {
1244                 status = PTR_ERR(chunk);
1245                 goto out;
1246         }
1247         od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1248         od->dq_chunk = chunk;
1249         status = ocfs2_extent_map_get_blocks(lqinode,
1250                                      ol_dqblk_block(sb, chunk->qc_num, offset),
1251                                      &od->dq_local_phys_blk,
1252                                      &pcount,
1253                                      NULL);
1254 
1255         /* Initialize dquot structure on disk */
1256         status = ocfs2_local_write_dquot(dquot);
1257         if (status < 0) {
1258                 mlog_errno(status);
1259                 goto out;
1260         }
1261 
1262         /* Mark structure as allocated */
1263         status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1264                                  &offset);
1265         if (status < 0) {
1266                 mlog_errno(status);
1267                 goto out;
1268         }
1269 out:
1270         up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1271         return status;
1272 }
1273 
1274 /*
1275  * Release dquot structure from local quota file. ocfs2_release_dquot() has
1276  * already started a transaction and written all changes to global quota file
1277  */
1278 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1279 {
1280         int status;
1281         int type = dquot->dq_id.type;
1282         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1283         struct super_block *sb = dquot->dq_sb;
1284         struct ocfs2_local_disk_chunk *dchunk;
1285         int offset;
1286 
1287         status = ocfs2_journal_access_dq(handle,
1288                         INODE_CACHE(sb_dqopt(sb)->files[type]),
1289                         od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1290         if (status < 0) {
1291                 mlog_errno(status);
1292                 goto out;
1293         }
1294         offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1295                                              od->dq_local_off);
1296         dchunk = (struct ocfs2_local_disk_chunk *)
1297                         (od->dq_chunk->qc_headerbh->b_data);
1298         /* Mark structure as freed */
1299         lock_buffer(od->dq_chunk->qc_headerbh);
1300         ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1301         le32_add_cpu(&dchunk->dqc_free, 1);
1302         unlock_buffer(od->dq_chunk->qc_headerbh);
1303         ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1304 
1305 out:
1306         /* Clear the read bit so that next time someone uses this
1307          * dquot he reads fresh info from disk and allocates local
1308          * dquot structure */
1309         clear_bit(DQ_READ_B, &dquot->dq_flags);
1310         return status;
1311 }
1312 
1313 static const struct quota_format_ops ocfs2_format_ops = {
1314         .check_quota_file       = ocfs2_local_check_quota_file,
1315         .read_file_info         = ocfs2_local_read_info,
1316         .write_file_info        = ocfs2_global_write_info,
1317         .free_file_info         = ocfs2_local_free_info,
1318 };
1319 
1320 struct quota_format_type ocfs2_quota_format = {
1321         .qf_fmt_id = QFMT_OCFS2,
1322         .qf_ops = &ocfs2_format_ops,
1323         .qf_owner = THIS_MODULE
1324 };
1325 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp