Commit | Line | Data |
---|---|---|
9e33d69f JK |
1 | /* |
2 | * Implementation of operations over global quota file | |
3 | */ | |
171bf93c | 4 | #include <linux/spinlock.h> |
9e33d69f | 5 | #include <linux/fs.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
9e33d69f JK |
7 | #include <linux/quota.h> |
8 | #include <linux/quotaops.h> | |
9 | #include <linux/dqblk_qtree.h> | |
171bf93c MF |
10 | #include <linux/jiffies.h> |
11 | #include <linux/writeback.h> | |
12 | #include <linux/workqueue.h> | |
9e33d69f JK |
13 | |
14 | #define MLOG_MASK_PREFIX ML_QUOTA | |
15 | #include <cluster/masklog.h> | |
16 | ||
17 | #include "ocfs2_fs.h" | |
18 | #include "ocfs2.h" | |
19 | #include "alloc.h" | |
d6b32bbb | 20 | #include "blockcheck.h" |
9e33d69f JK |
21 | #include "inode.h" |
22 | #include "journal.h" | |
23 | #include "file.h" | |
24 | #include "sysfile.h" | |
25 | #include "dlmglue.h" | |
26 | #include "uptodate.h" | |
ada50827 | 27 | #include "super.h" |
f64dd44e | 28 | #include "buffer_head_io.h" |
9e33d69f JK |
29 | #include "quota.h" |
30 | ||
fb8dd8d7 JK |
31 | /* |
32 | * Locking of quotas with OCFS2 is rather complex. Here are rules that | |
33 | * should be obeyed by all the functions: | |
34 | * - any write of quota structure (either to local or global file) is protected | |
35 | * by dqio_mutex or dquot->dq_lock. | |
36 | * - any modification of global quota file holds inode cluster lock, i_mutex, | |
37 | * and ip_alloc_sem of the global quota file (achieved by | |
38 | * ocfs2_lock_global_qf). It also has to hold qinfo_lock. | |
39 | * - an allocation of new blocks for local quota file is protected by | |
40 | * its ip_alloc_sem | |
41 | * | |
42 | * A rough sketch of locking dependencies (lf = local file, gf = global file): | |
43 | * Normal filesystem operation: | |
44 | * start_trans -> dqio_mutex -> write to lf | |
45 | * Syncing of local and global file: | |
46 | * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock -> | |
47 | * write to gf | |
48 | * -> write to lf | |
49 | * Acquire dquot for the first time: | |
50 | * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf | |
51 | * -> alloc space for gf | |
52 | * -> start_trans -> qinfo_lock -> write to gf | |
53 | * -> ip_alloc_sem of lf -> alloc space for lf | |
54 | * -> write to lf | |
55 | * Release last reference to dquot: | |
56 | * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf | |
57 | * -> write to lf | |
58 | * Note that all the above operations also hold the inode cluster lock of lf. | |
59 | * Recovery: | |
60 | * inode cluster lock of recovered lf | |
61 | * -> read bitmaps -> ip_alloc_sem of lf | |
62 | * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock -> | |
63 | * write to gf | |
64 | */ | |
65 | ||
171bf93c MF |
66 | static struct workqueue_struct *ocfs2_quota_wq = NULL; |
67 | ||
68 | static void qsync_work_fn(struct work_struct *work); | |
69 | ||
9e33d69f JK |
70 | static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp) |
71 | { | |
72 | struct ocfs2_global_disk_dqblk *d = dp; | |
73 | struct mem_dqblk *m = &dquot->dq_dqb; | |
74 | ||
75 | /* Update from disk only entries not set by the admin */ | |
76 | if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) { | |
77 | m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); | |
78 | m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); | |
79 | } | |
80 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
81 | m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); | |
82 | if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) { | |
83 | m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit); | |
84 | m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit); | |
85 | } | |
86 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) | |
87 | m->dqb_curspace = le64_to_cpu(d->dqb_curspace); | |
88 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags)) | |
89 | m->dqb_btime = le64_to_cpu(d->dqb_btime); | |
90 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags)) | |
91 | m->dqb_itime = le64_to_cpu(d->dqb_itime); | |
92 | OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count); | |
93 | } | |
94 | ||
95 | static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot) | |
96 | { | |
97 | struct ocfs2_global_disk_dqblk *d = dp; | |
98 | struct mem_dqblk *m = &dquot->dq_dqb; | |
99 | ||
100 | d->dqb_id = cpu_to_le32(dquot->dq_id); | |
101 | d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count); | |
102 | d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); | |
103 | d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); | |
104 | d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); | |
105 | d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit); | |
106 | d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit); | |
107 | d->dqb_curspace = cpu_to_le64(m->dqb_curspace); | |
108 | d->dqb_btime = cpu_to_le64(m->dqb_btime); | |
109 | d->dqb_itime = cpu_to_le64(m->dqb_itime); | |
7669f54c | 110 | d->dqb_pad1 = d->dqb_pad2 = 0; |
9e33d69f JK |
111 | } |
112 | ||
113 | static int ocfs2_global_is_id(void *dp, struct dquot *dquot) | |
114 | { | |
115 | struct ocfs2_global_disk_dqblk *d = dp; | |
116 | struct ocfs2_mem_dqinfo *oinfo = | |
117 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
118 | ||
119 | if (qtree_entry_unused(&oinfo->dqi_gi, dp)) | |
120 | return 0; | |
121 | return le32_to_cpu(d->dqb_id) == dquot->dq_id; | |
122 | } | |
123 | ||
124 | struct qtree_fmt_operations ocfs2_global_ops = { | |
125 | .mem2disk_dqblk = ocfs2_global_mem2diskdqb, | |
126 | .disk2mem_dqblk = ocfs2_global_disk2memdqb, | |
127 | .is_id = ocfs2_global_is_id, | |
128 | }; | |
129 | ||
fb8dd8d7 | 130 | int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh) |
684ef278 | 131 | { |
d6b32bbb JB |
132 | struct ocfs2_disk_dqtrailer *dqt = |
133 | ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data); | |
684ef278 JB |
134 | |
135 | mlog(0, "Validating quota block %llu\n", | |
136 | (unsigned long long)bh->b_blocknr); | |
137 | ||
d6b32bbb JB |
138 | BUG_ON(!buffer_uptodate(bh)); |
139 | ||
140 | /* | |
141 | * If the ecc fails, we return the error but otherwise | |
142 | * leave the filesystem running. We know any error is | |
143 | * local to this block. | |
144 | */ | |
145 | return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check); | |
684ef278 JB |
146 | } |
147 | ||
f64dd44e JK |
148 | int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
149 | struct buffer_head **bhp) | |
150 | { | |
151 | int rc; | |
152 | ||
153 | *bhp = NULL; | |
154 | rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0, | |
155 | ocfs2_validate_quota_block); | |
156 | if (rc) | |
157 | mlog_errno(rc); | |
158 | return rc; | |
159 | } | |
160 | ||
9e33d69f JK |
161 | /* Read data from global quotafile - avoid pagecache and such because we cannot |
162 | * afford acquiring the locks... We use quota cluster lock to serialize | |
163 | * operations. Caller is responsible for acquiring it. */ | |
164 | ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, | |
165 | size_t len, loff_t off) | |
166 | { | |
167 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
168 | struct inode *gqinode = oinfo->dqi_gqinode; | |
169 | loff_t i_size = i_size_read(gqinode); | |
170 | int offset = off & (sb->s_blocksize - 1); | |
171 | sector_t blk = off >> sb->s_blocksize_bits; | |
172 | int err = 0; | |
173 | struct buffer_head *bh; | |
174 | size_t toread, tocopy; | |
fb8dd8d7 | 175 | u64 pblock = 0, pcount = 0; |
9e33d69f JK |
176 | |
177 | if (off > i_size) | |
178 | return 0; | |
179 | if (off + len > i_size) | |
180 | len = i_size - off; | |
181 | toread = len; | |
182 | while (toread > 0) { | |
dad7d975 | 183 | tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
fb8dd8d7 JK |
184 | if (!pcount) { |
185 | err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, | |
186 | &pcount, NULL); | |
187 | if (err) { | |
188 | mlog_errno(err); | |
189 | return err; | |
190 | } | |
191 | } else { | |
192 | pcount--; | |
193 | pblock++; | |
194 | } | |
85eb8b73 | 195 | bh = NULL; |
fb8dd8d7 | 196 | err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
85eb8b73 | 197 | if (err) { |
9e33d69f JK |
198 | mlog_errno(err); |
199 | return err; | |
200 | } | |
201 | memcpy(data, bh->b_data + offset, tocopy); | |
202 | brelse(bh); | |
203 | offset = 0; | |
204 | toread -= tocopy; | |
205 | data += tocopy; | |
206 | blk++; | |
207 | } | |
208 | return len; | |
209 | } | |
210 | ||
211 | /* Write to quotafile (we know the transaction is already started and has | |
212 | * enough credits) */ | |
213 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, | |
214 | const char *data, size_t len, loff_t off) | |
215 | { | |
216 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
217 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
218 | struct inode *gqinode = oinfo->dqi_gqinode; | |
219 | int offset = off & (sb->s_blocksize - 1); | |
220 | sector_t blk = off >> sb->s_blocksize_bits; | |
af09e51b | 221 | int err = 0, new = 0, ja_type; |
85eb8b73 | 222 | struct buffer_head *bh = NULL; |
9e33d69f | 223 | handle_t *handle = journal_current_handle(); |
fb8dd8d7 | 224 | u64 pblock, pcount; |
9e33d69f JK |
225 | |
226 | if (!handle) { | |
227 | mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled " | |
228 | "because transaction was not started.\n", | |
229 | (unsigned long long)off, (unsigned long long)len); | |
230 | return -EIO; | |
231 | } | |
232 | if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) { | |
233 | WARN_ON(1); | |
234 | len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset; | |
235 | } | |
236 | ||
9e33d69f | 237 | if (gqinode->i_size < off + len) { |
b57ac2c4 JK |
238 | loff_t rounded_end = |
239 | ocfs2_align_bytes_to_blocks(sb, off + len); | |
240 | ||
fb8dd8d7 | 241 | /* Space is already allocated in ocfs2_acquire_dquot() */ |
9e33d69f JK |
242 | err = ocfs2_simple_size_update(gqinode, |
243 | oinfo->dqi_gqi_bh, | |
b57ac2c4 | 244 | rounded_end); |
9e33d69f JK |
245 | if (err < 0) |
246 | goto out; | |
247 | new = 1; | |
248 | } | |
fb8dd8d7 JK |
249 | err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL); |
250 | if (err) { | |
251 | mlog_errno(err); | |
252 | goto out; | |
253 | } | |
9e33d69f JK |
254 | /* Not rewriting whole block? */ |
255 | if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) && | |
256 | !new) { | |
fb8dd8d7 | 257 | err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
af09e51b | 258 | ja_type = OCFS2_JOURNAL_ACCESS_WRITE; |
9e33d69f | 259 | } else { |
fb8dd8d7 JK |
260 | bh = sb_getblk(sb, pblock); |
261 | if (!bh) | |
262 | err = -ENOMEM; | |
af09e51b | 263 | ja_type = OCFS2_JOURNAL_ACCESS_CREATE; |
9e33d69f | 264 | } |
af09e51b JK |
265 | if (err) { |
266 | mlog_errno(err); | |
e9956fae | 267 | goto out; |
9e33d69f JK |
268 | } |
269 | lock_buffer(bh); | |
270 | if (new) | |
271 | memset(bh->b_data, 0, sb->s_blocksize); | |
272 | memcpy(bh->b_data + offset, data, len); | |
273 | flush_dcache_page(bh->b_page); | |
af09e51b | 274 | set_buffer_uptodate(bh); |
9e33d69f | 275 | unlock_buffer(bh); |
8cb471e8 | 276 | ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh); |
0cf2f763 JB |
277 | err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh, |
278 | ja_type); | |
af09e51b JK |
279 | if (err < 0) { |
280 | brelse(bh); | |
281 | goto out; | |
282 | } | |
ec20cec7 | 283 | ocfs2_journal_dirty(handle, bh); |
9e33d69f | 284 | brelse(bh); |
9e33d69f JK |
285 | out: |
286 | if (err) { | |
9e33d69f JK |
287 | mlog_errno(err); |
288 | return err; | |
289 | } | |
290 | gqinode->i_version++; | |
291 | ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh); | |
9e33d69f JK |
292 | return len; |
293 | } | |
294 | ||
295 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) | |
296 | { | |
297 | int status; | |
298 | struct buffer_head *bh = NULL; | |
299 | ||
300 | status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex); | |
301 | if (status < 0) | |
302 | return status; | |
303 | spin_lock(&dq_data_lock); | |
304 | if (!oinfo->dqi_gqi_count++) | |
305 | oinfo->dqi_gqi_bh = bh; | |
306 | else | |
307 | WARN_ON(bh != oinfo->dqi_gqi_bh); | |
308 | spin_unlock(&dq_data_lock); | |
fb8dd8d7 JK |
309 | if (ex) { |
310 | mutex_lock(&oinfo->dqi_gqinode->i_mutex); | |
311 | down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
312 | } else { | |
313 | down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
314 | } | |
9e33d69f JK |
315 | return 0; |
316 | } | |
317 | ||
318 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) | |
319 | { | |
fb8dd8d7 JK |
320 | if (ex) { |
321 | up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
322 | mutex_unlock(&oinfo->dqi_gqinode->i_mutex); | |
323 | } else { | |
324 | up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
325 | } | |
9e33d69f JK |
326 | ocfs2_inode_unlock(oinfo->dqi_gqinode, ex); |
327 | brelse(oinfo->dqi_gqi_bh); | |
328 | spin_lock(&dq_data_lock); | |
329 | if (!--oinfo->dqi_gqi_count) | |
330 | oinfo->dqi_gqi_bh = NULL; | |
331 | spin_unlock(&dq_data_lock); | |
332 | } | |
333 | ||
334 | /* Read information header from global quota file */ | |
335 | int ocfs2_global_read_info(struct super_block *sb, int type) | |
336 | { | |
337 | struct inode *gqinode = NULL; | |
338 | unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, | |
339 | GROUP_QUOTA_SYSTEM_INODE }; | |
340 | struct ocfs2_global_disk_dqinfo dinfo; | |
341 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
342 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
ae4f6ef1 | 343 | u64 pcount; |
9e33d69f JK |
344 | int status; |
345 | ||
346 | mlog_entry_void(); | |
347 | ||
348 | /* Read global header */ | |
349 | gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], | |
350 | OCFS2_INVALID_SLOT); | |
351 | if (!gqinode) { | |
352 | mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n", | |
353 | type); | |
354 | status = -EINVAL; | |
355 | goto out_err; | |
356 | } | |
357 | oinfo->dqi_gi.dqi_sb = sb; | |
358 | oinfo->dqi_gi.dqi_type = type; | |
359 | ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo); | |
360 | oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); | |
361 | oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; | |
362 | oinfo->dqi_gqi_bh = NULL; | |
363 | oinfo->dqi_gqi_count = 0; | |
364 | oinfo->dqi_gqinode = gqinode; | |
365 | status = ocfs2_lock_global_qf(oinfo, 0); | |
366 | if (status < 0) { | |
367 | mlog_errno(status); | |
368 | goto out_err; | |
369 | } | |
ae4f6ef1 JK |
370 | |
371 | status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk, | |
372 | &pcount, NULL); | |
373 | if (status < 0) | |
374 | goto out_unlock; | |
375 | ||
376 | status = ocfs2_qinfo_lock(oinfo, 0); | |
377 | if (status < 0) | |
378 | goto out_unlock; | |
9e33d69f JK |
379 | status = sb->s_op->quota_read(sb, type, (char *)&dinfo, |
380 | sizeof(struct ocfs2_global_disk_dqinfo), | |
381 | OCFS2_GLOBAL_INFO_OFF); | |
ae4f6ef1 | 382 | ocfs2_qinfo_unlock(oinfo, 0); |
9e33d69f JK |
383 | ocfs2_unlock_global_qf(oinfo, 0); |
384 | if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
385 | mlog(ML_ERROR, "Cannot read global quota info (%d).\n", | |
386 | status); | |
387 | if (status >= 0) | |
388 | status = -EIO; | |
389 | mlog_errno(status); | |
390 | goto out_err; | |
391 | } | |
392 | info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); | |
393 | info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); | |
394 | oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); | |
395 | oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); | |
396 | oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); | |
397 | oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); | |
398 | oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; | |
399 | oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - | |
400 | OCFS2_QBLK_RESERVED_SPACE; | |
401 | oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi); | |
171bf93c MF |
402 | INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
403 | queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work, | |
4539f1df | 404 | msecs_to_jiffies(oinfo->dqi_syncms)); |
171bf93c | 405 | |
9e33d69f JK |
406 | out_err: |
407 | mlog_exit(status); | |
408 | return status; | |
ae4f6ef1 JK |
409 | out_unlock: |
410 | ocfs2_unlock_global_qf(oinfo, 0); | |
411 | mlog_errno(status); | |
412 | goto out_err; | |
9e33d69f JK |
413 | } |
414 | ||
415 | /* Write information to global quota file. Expects exlusive lock on quota | |
416 | * file inode and quota info */ | |
417 | static int __ocfs2_global_write_info(struct super_block *sb, int type) | |
418 | { | |
419 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
420 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
421 | struct ocfs2_global_disk_dqinfo dinfo; | |
422 | ssize_t size; | |
423 | ||
424 | spin_lock(&dq_data_lock); | |
425 | info->dqi_flags &= ~DQF_INFO_DIRTY; | |
426 | dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); | |
427 | dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); | |
428 | spin_unlock(&dq_data_lock); | |
429 | dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms); | |
430 | dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks); | |
431 | dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk); | |
432 | dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry); | |
433 | size = sb->s_op->quota_write(sb, type, (char *)&dinfo, | |
434 | sizeof(struct ocfs2_global_disk_dqinfo), | |
435 | OCFS2_GLOBAL_INFO_OFF); | |
436 | if (size != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
437 | mlog(ML_ERROR, "Cannot write global quota info structure\n"); | |
438 | if (size >= 0) | |
439 | size = -EIO; | |
440 | return size; | |
441 | } | |
442 | return 0; | |
443 | } | |
444 | ||
445 | int ocfs2_global_write_info(struct super_block *sb, int type) | |
446 | { | |
447 | int err; | |
448 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
449 | ||
450 | err = ocfs2_qinfo_lock(info, 1); | |
451 | if (err < 0) | |
452 | return err; | |
453 | err = __ocfs2_global_write_info(sb, type); | |
454 | ocfs2_qinfo_unlock(info, 1); | |
455 | return err; | |
456 | } | |
457 | ||
b409d7a0 JK |
458 | static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
459 | { | |
460 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
461 | ||
462 | /* | |
463 | * We may need to allocate tree blocks and a leaf block but not the | |
464 | * root block | |
465 | */ | |
466 | return oinfo->dqi_gi.dqi_qtree_depth; | |
467 | } | |
468 | ||
469 | static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) | |
470 | { | |
832d09cf JK |
471 | /* We modify all the allocated blocks, tree root, info block and |
472 | * the inode */ | |
b409d7a0 | 473 | return (ocfs2_global_qinit_alloc(sb, type) + 2) * |
832d09cf | 474 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1; |
b409d7a0 JK |
475 | } |
476 | ||
9e33d69f JK |
477 | /* Sync local information about quota modifications with global quota file. |
478 | * Caller must have started the transaction and obtained exclusive lock for | |
479 | * global quota file inode */ | |
480 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) | |
481 | { | |
482 | int err, err2; | |
483 | struct super_block *sb = dquot->dq_sb; | |
484 | int type = dquot->dq_type; | |
485 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
486 | struct ocfs2_global_disk_dqblk dqblk; | |
487 | s64 spacechange, inodechange; | |
488 | time_t olditime, oldbtime; | |
489 | ||
490 | err = sb->s_op->quota_read(sb, type, (char *)&dqblk, | |
491 | sizeof(struct ocfs2_global_disk_dqblk), | |
492 | dquot->dq_off); | |
493 | if (err != sizeof(struct ocfs2_global_disk_dqblk)) { | |
494 | if (err >= 0) { | |
495 | mlog(ML_ERROR, "Short read from global quota file " | |
496 | "(%u read)\n", err); | |
497 | err = -EIO; | |
498 | } | |
499 | goto out; | |
500 | } | |
501 | ||
502 | /* Update space and inode usage. Get also other information from | |
503 | * global quota file so that we don't overwrite any changes there. | |
504 | * We are */ | |
505 | spin_lock(&dq_data_lock); | |
506 | spacechange = dquot->dq_dqb.dqb_curspace - | |
507 | OCFS2_DQUOT(dquot)->dq_origspace; | |
508 | inodechange = dquot->dq_dqb.dqb_curinodes - | |
509 | OCFS2_DQUOT(dquot)->dq_originodes; | |
510 | olditime = dquot->dq_dqb.dqb_itime; | |
511 | oldbtime = dquot->dq_dqb.dqb_btime; | |
512 | ocfs2_global_disk2memdqb(dquot, &dqblk); | |
9a2f3866 JK |
513 | mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n", |
514 | dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange, | |
515 | dquot->dq_dqb.dqb_curinodes, (long long)inodechange); | |
9e33d69f JK |
516 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
517 | dquot->dq_dqb.dqb_curspace += spacechange; | |
518 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
519 | dquot->dq_dqb.dqb_curinodes += inodechange; | |
520 | /* Set properly space grace time... */ | |
521 | if (dquot->dq_dqb.dqb_bsoftlimit && | |
522 | dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { | |
523 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && | |
524 | oldbtime > 0) { | |
525 | if (dquot->dq_dqb.dqb_btime > 0) | |
526 | dquot->dq_dqb.dqb_btime = | |
527 | min(dquot->dq_dqb.dqb_btime, oldbtime); | |
528 | else | |
529 | dquot->dq_dqb.dqb_btime = oldbtime; | |
530 | } | |
531 | } else { | |
532 | dquot->dq_dqb.dqb_btime = 0; | |
533 | clear_bit(DQ_BLKS_B, &dquot->dq_flags); | |
534 | } | |
535 | /* Set properly inode grace time... */ | |
536 | if (dquot->dq_dqb.dqb_isoftlimit && | |
537 | dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { | |
538 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && | |
539 | olditime > 0) { | |
540 | if (dquot->dq_dqb.dqb_itime > 0) | |
541 | dquot->dq_dqb.dqb_itime = | |
542 | min(dquot->dq_dqb.dqb_itime, olditime); | |
543 | else | |
544 | dquot->dq_dqb.dqb_itime = olditime; | |
545 | } | |
546 | } else { | |
547 | dquot->dq_dqb.dqb_itime = 0; | |
548 | clear_bit(DQ_INODES_B, &dquot->dq_flags); | |
549 | } | |
550 | /* All information is properly updated, clear the flags */ | |
551 | __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); | |
552 | __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); | |
553 | __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); | |
554 | __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); | |
555 | __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); | |
556 | __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); | |
557 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
558 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
559 | spin_unlock(&dq_data_lock); | |
560 | err = ocfs2_qinfo_lock(info, freeing); | |
561 | if (err < 0) { | |
562 | mlog(ML_ERROR, "Failed to lock quota info, loosing quota write" | |
563 | " (type=%d, id=%u)\n", dquot->dq_type, | |
564 | (unsigned)dquot->dq_id); | |
565 | goto out; | |
566 | } | |
567 | if (freeing) | |
568 | OCFS2_DQUOT(dquot)->dq_use_count--; | |
569 | err = qtree_write_dquot(&info->dqi_gi, dquot); | |
570 | if (err < 0) | |
571 | goto out_qlock; | |
572 | if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { | |
573 | err = qtree_release_dquot(&info->dqi_gi, dquot); | |
574 | if (info_dirty(sb_dqinfo(sb, type))) { | |
575 | err2 = __ocfs2_global_write_info(sb, type); | |
576 | if (!err) | |
577 | err = err2; | |
578 | } | |
579 | } | |
580 | out_qlock: | |
581 | ocfs2_qinfo_unlock(info, freeing); | |
582 | out: | |
583 | if (err < 0) | |
584 | mlog_errno(err); | |
585 | return err; | |
586 | } | |
587 | ||
171bf93c MF |
588 | /* |
589 | * Functions for periodic syncing of dquots with global file | |
590 | */ | |
591 | static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) | |
592 | { | |
593 | handle_t *handle; | |
594 | struct super_block *sb = dquot->dq_sb; | |
595 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
596 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
597 | int status = 0; | |
598 | ||
599 | mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id, | |
600 | dquot->dq_type, type, sb->s_id); | |
601 | if (type != dquot->dq_type) | |
602 | goto out; | |
603 | status = ocfs2_lock_global_qf(oinfo, 1); | |
604 | if (status < 0) | |
605 | goto out; | |
606 | ||
607 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
608 | if (IS_ERR(handle)) { | |
609 | status = PTR_ERR(handle); | |
610 | mlog_errno(status); | |
611 | goto out_ilock; | |
612 | } | |
613 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); | |
614 | status = ocfs2_sync_dquot(dquot); | |
171bf93c MF |
615 | if (status < 0) |
616 | mlog_errno(status); | |
617 | /* We have to write local structure as well... */ | |
741e1289 | 618 | status = ocfs2_local_write_dquot(dquot); |
171bf93c MF |
619 | if (status < 0) |
620 | mlog_errno(status); | |
741e1289 | 621 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
171bf93c MF |
622 | ocfs2_commit_trans(osb, handle); |
623 | out_ilock: | |
624 | ocfs2_unlock_global_qf(oinfo, 1); | |
625 | out: | |
626 | mlog_exit(status); | |
627 | return status; | |
628 | } | |
629 | ||
630 | static void qsync_work_fn(struct work_struct *work) | |
631 | { | |
632 | struct ocfs2_mem_dqinfo *oinfo = container_of(work, | |
633 | struct ocfs2_mem_dqinfo, | |
634 | dqi_sync_work.work); | |
635 | struct super_block *sb = oinfo->dqi_gqinode->i_sb; | |
636 | ||
637 | dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); | |
638 | queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work, | |
4539f1df | 639 | msecs_to_jiffies(oinfo->dqi_syncms)); |
171bf93c MF |
640 | } |
641 | ||
9e33d69f JK |
642 | /* |
643 | * Wrappers for generic quota functions | |
644 | */ | |
645 | ||
646 | static int ocfs2_write_dquot(struct dquot *dquot) | |
647 | { | |
648 | handle_t *handle; | |
649 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
650 | int status = 0; | |
651 | ||
652 | mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type); | |
653 | ||
654 | handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); | |
655 | if (IS_ERR(handle)) { | |
656 | status = PTR_ERR(handle); | |
657 | mlog_errno(status); | |
658 | goto out; | |
659 | } | |
741e1289 JK |
660 | mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
661 | status = ocfs2_local_write_dquot(dquot); | |
662 | mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); | |
9e33d69f JK |
663 | ocfs2_commit_trans(osb, handle); |
664 | out: | |
665 | mlog_exit(status); | |
666 | return status; | |
667 | } | |
668 | ||
b409d7a0 | 669 | static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
9e33d69f | 670 | { |
b409d7a0 | 671 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
0584974a JK |
672 | /* |
673 | * We modify tree, leaf block, global info, local chunk header, | |
674 | * global and local inode; OCFS2_QINFO_WRITE_CREDITS already | |
675 | * accounts for inode update | |
676 | */ | |
b409d7a0 JK |
677 | return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
678 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + | |
0584974a | 679 | OCFS2_QINFO_WRITE_CREDITS + |
0584974a | 680 | OCFS2_INODE_UPDATE_CREDITS; |
9e33d69f JK |
681 | } |
682 | ||
683 | static int ocfs2_release_dquot(struct dquot *dquot) | |
684 | { | |
685 | handle_t *handle; | |
686 | struct ocfs2_mem_dqinfo *oinfo = | |
687 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
688 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
689 | int status = 0; | |
690 | ||
691 | mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type); | |
692 | ||
fb8dd8d7 JK |
693 | mutex_lock(&dquot->dq_lock); |
694 | /* Check whether we are not racing with some other dqget() */ | |
695 | if (atomic_read(&dquot->dq_count) > 1) | |
696 | goto out; | |
9e33d69f JK |
697 | status = ocfs2_lock_global_qf(oinfo, 1); |
698 | if (status < 0) | |
699 | goto out; | |
700 | handle = ocfs2_start_trans(osb, | |
701 | ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type)); | |
702 | if (IS_ERR(handle)) { | |
703 | status = PTR_ERR(handle); | |
704 | mlog_errno(status); | |
705 | goto out_ilock; | |
706 | } | |
fb8dd8d7 JK |
707 | |
708 | status = ocfs2_global_release_dquot(dquot); | |
709 | if (status < 0) { | |
710 | mlog_errno(status); | |
711 | goto out_trans; | |
712 | } | |
713 | status = ocfs2_local_release_dquot(handle, dquot); | |
714 | /* | |
715 | * If we fail here, we cannot do much as global structure is | |
716 | * already released. So just complain... | |
717 | */ | |
718 | if (status < 0) | |
719 | mlog_errno(status); | |
720 | clear_bit(DQ_ACTIVE_B, &dquot->dq_flags); | |
721 | out_trans: | |
9e33d69f JK |
722 | ocfs2_commit_trans(osb, handle); |
723 | out_ilock: | |
724 | ocfs2_unlock_global_qf(oinfo, 1); | |
725 | out: | |
fb8dd8d7 | 726 | mutex_unlock(&dquot->dq_lock); |
9e33d69f JK |
727 | mlog_exit(status); |
728 | return status; | |
729 | } | |
730 | ||
fb8dd8d7 JK |
731 | /* |
732 | * Read global dquot structure from disk or create it if it does | |
733 | * not exist. Also update use count of the global structure and | |
734 | * create structure in node-local quota file. | |
735 | */ | |
9e33d69f JK |
736 | static int ocfs2_acquire_dquot(struct dquot *dquot) |
737 | { | |
fb8dd8d7 JK |
738 | int status = 0, err; |
739 | int ex = 0; | |
740 | struct super_block *sb = dquot->dq_sb; | |
741 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
742 | int type = dquot->dq_type; | |
743 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
744 | struct inode *gqinode = info->dqi_gqinode; | |
745 | int need_alloc = ocfs2_global_qinit_alloc(sb, type); | |
746 | handle_t *handle; | |
9e33d69f | 747 | |
fb8dd8d7 JK |
748 | mlog_entry("id=%u, type=%d", dquot->dq_id, type); |
749 | mutex_lock(&dquot->dq_lock); | |
750 | /* | |
751 | * We need an exclusive lock, because we're going to update use count | |
752 | * and instantiate possibly new dquot structure | |
753 | */ | |
754 | status = ocfs2_lock_global_qf(info, 1); | |
9e33d69f JK |
755 | if (status < 0) |
756 | goto out; | |
fb8dd8d7 JK |
757 | if (!test_bit(DQ_READ_B, &dquot->dq_flags)) { |
758 | status = ocfs2_qinfo_lock(info, 0); | |
759 | if (status < 0) | |
760 | goto out_dq; | |
761 | status = qtree_read_dquot(&info->dqi_gi, dquot); | |
762 | ocfs2_qinfo_unlock(info, 0); | |
763 | if (status < 0) | |
764 | goto out_dq; | |
765 | } | |
766 | set_bit(DQ_READ_B, &dquot->dq_flags); | |
767 | ||
768 | OCFS2_DQUOT(dquot)->dq_use_count++; | |
769 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
770 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
771 | if (!dquot->dq_off) { /* No real quota entry? */ | |
772 | ex = 1; | |
773 | /* | |
774 | * Add blocks to quota file before we start a transaction since | |
775 | * locking allocators ranks above a transaction start | |
776 | */ | |
777 | WARN_ON(journal_current_handle()); | |
5693486b | 778 | status = ocfs2_extend_no_holes(gqinode, NULL, |
fb8dd8d7 JK |
779 | gqinode->i_size + (need_alloc << sb->s_blocksize_bits), |
780 | gqinode->i_size); | |
781 | if (status < 0) | |
782 | goto out_dq; | |
783 | } | |
784 | ||
785 | handle = ocfs2_start_trans(osb, | |
786 | ocfs2_calc_global_qinit_credits(sb, type)); | |
787 | if (IS_ERR(handle)) { | |
788 | status = PTR_ERR(handle); | |
789 | goto out_dq; | |
790 | } | |
791 | status = ocfs2_qinfo_lock(info, ex); | |
792 | if (status < 0) | |
793 | goto out_trans; | |
794 | status = qtree_write_dquot(&info->dqi_gi, dquot); | |
795 | if (ex && info_dirty(sb_dqinfo(sb, type))) { | |
796 | err = __ocfs2_global_write_info(sb, type); | |
797 | if (!status) | |
798 | status = err; | |
799 | } | |
800 | ocfs2_qinfo_unlock(info, ex); | |
801 | out_trans: | |
802 | ocfs2_commit_trans(osb, handle); | |
803 | out_dq: | |
804 | ocfs2_unlock_global_qf(info, 1); | |
805 | if (status < 0) | |
806 | goto out; | |
807 | ||
808 | status = ocfs2_create_local_dquot(dquot); | |
809 | if (status < 0) | |
810 | goto out; | |
811 | set_bit(DQ_ACTIVE_B, &dquot->dq_flags); | |
9e33d69f | 812 | out: |
fb8dd8d7 | 813 | mutex_unlock(&dquot->dq_lock); |
9e33d69f JK |
814 | mlog_exit(status); |
815 | return status; | |
816 | } | |
817 | ||
818 | static int ocfs2_mark_dquot_dirty(struct dquot *dquot) | |
819 | { | |
820 | unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | | |
821 | (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | | |
822 | (1 << (DQ_LASTSET_B + QIF_INODES_B)) | | |
823 | (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | | |
824 | (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | | |
825 | (1 << (DQ_LASTSET_B + QIF_ITIME_B)); | |
826 | int sync = 0; | |
827 | int status; | |
828 | struct super_block *sb = dquot->dq_sb; | |
829 | int type = dquot->dq_type; | |
830 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
831 | handle_t *handle; | |
832 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
833 | ||
834 | mlog_entry("id=%u, type=%d", dquot->dq_id, type); | |
9e33d69f JK |
835 | |
836 | /* In case user set some limits, sync dquot immediately to global | |
837 | * quota file so that information propagates quicker */ | |
838 | spin_lock(&dq_data_lock); | |
839 | if (dquot->dq_flags & mask) | |
840 | sync = 1; | |
841 | spin_unlock(&dq_data_lock); | |
f8afead7 JK |
842 | /* This is a slight hack but we can't afford getting global quota |
843 | * lock if we already have a transaction started. */ | |
844 | if (!sync || journal_current_handle()) { | |
9e33d69f JK |
845 | status = ocfs2_write_dquot(dquot); |
846 | goto out; | |
847 | } | |
848 | status = ocfs2_lock_global_qf(oinfo, 1); | |
849 | if (status < 0) | |
850 | goto out; | |
851 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
852 | if (IS_ERR(handle)) { | |
853 | status = PTR_ERR(handle); | |
854 | mlog_errno(status); | |
855 | goto out_ilock; | |
856 | } | |
fb8dd8d7 | 857 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
858 | status = ocfs2_sync_dquot(dquot); |
859 | if (status < 0) { | |
860 | mlog_errno(status); | |
741e1289 | 861 | goto out_dlock; |
9e33d69f JK |
862 | } |
863 | /* Now write updated local dquot structure */ | |
741e1289 JK |
864 | status = ocfs2_local_write_dquot(dquot); |
865 | out_dlock: | |
866 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
9e33d69f JK |
867 | ocfs2_commit_trans(osb, handle); |
868 | out_ilock: | |
869 | ocfs2_unlock_global_qf(oinfo, 1); | |
870 | out: | |
871 | mlog_exit(status); | |
872 | return status; | |
873 | } | |
874 | ||
875 | /* This should happen only after set_dqinfo(). */ | |
876 | static int ocfs2_write_info(struct super_block *sb, int type) | |
877 | { | |
878 | handle_t *handle; | |
879 | int status = 0; | |
880 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
881 | ||
882 | mlog_entry_void(); | |
883 | ||
884 | status = ocfs2_lock_global_qf(oinfo, 1); | |
885 | if (status < 0) | |
886 | goto out; | |
887 | handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); | |
888 | if (IS_ERR(handle)) { | |
889 | status = PTR_ERR(handle); | |
890 | mlog_errno(status); | |
891 | goto out_ilock; | |
892 | } | |
893 | status = dquot_commit_info(sb, type); | |
894 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
895 | out_ilock: | |
896 | ocfs2_unlock_global_qf(oinfo, 1); | |
897 | out: | |
898 | mlog_exit(status); | |
899 | return status; | |
900 | } | |
901 | ||
9e33d69f JK |
902 | static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
903 | { | |
904 | struct ocfs2_dquot *dquot = | |
905 | kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS); | |
906 | ||
907 | if (!dquot) | |
908 | return NULL; | |
909 | return &dquot->dq_dquot; | |
910 | } | |
911 | ||
912 | static void ocfs2_destroy_dquot(struct dquot *dquot) | |
913 | { | |
914 | kmem_cache_free(ocfs2_dquot_cachep, dquot); | |
915 | } | |
916 | ||
61e225dc | 917 | const struct dquot_operations ocfs2_quota_operations = { |
741e1289 | 918 | /* We never make dquot dirty so .write_dquot is never called */ |
9e33d69f JK |
919 | .acquire_dquot = ocfs2_acquire_dquot, |
920 | .release_dquot = ocfs2_release_dquot, | |
921 | .mark_dirty = ocfs2_mark_dquot_dirty, | |
922 | .write_info = ocfs2_write_info, | |
923 | .alloc_dquot = ocfs2_alloc_dquot, | |
924 | .destroy_dquot = ocfs2_destroy_dquot, | |
925 | }; | |
171bf93c MF |
926 | |
927 | int ocfs2_quota_setup(void) | |
928 | { | |
929 | ocfs2_quota_wq = create_workqueue("o2quot"); | |
930 | if (!ocfs2_quota_wq) | |
931 | return -ENOMEM; | |
932 | return 0; | |
933 | } | |
934 | ||
935 | void ocfs2_quota_shutdown(void) | |
936 | { | |
937 | if (ocfs2_quota_wq) { | |
938 | flush_workqueue(ocfs2_quota_wq); | |
939 | destroy_workqueue(ocfs2_quota_wq); | |
940 | ocfs2_quota_wq = NULL; | |
941 | } | |
942 | } |