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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 | ||
9e33d69f JK |
346 | /* Read global header */ |
347 | gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], | |
348 | OCFS2_INVALID_SLOT); | |
349 | if (!gqinode) { | |
350 | mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n", | |
351 | type); | |
352 | status = -EINVAL; | |
353 | goto out_err; | |
354 | } | |
355 | oinfo->dqi_gi.dqi_sb = sb; | |
356 | oinfo->dqi_gi.dqi_type = type; | |
357 | ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo); | |
358 | oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); | |
359 | oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; | |
360 | oinfo->dqi_gqi_bh = NULL; | |
361 | oinfo->dqi_gqi_count = 0; | |
362 | oinfo->dqi_gqinode = gqinode; | |
363 | status = ocfs2_lock_global_qf(oinfo, 0); | |
364 | if (status < 0) { | |
365 | mlog_errno(status); | |
366 | goto out_err; | |
367 | } | |
ae4f6ef1 JK |
368 | |
369 | status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk, | |
370 | &pcount, NULL); | |
371 | if (status < 0) | |
372 | goto out_unlock; | |
373 | ||
374 | status = ocfs2_qinfo_lock(oinfo, 0); | |
375 | if (status < 0) | |
376 | goto out_unlock; | |
9e33d69f JK |
377 | status = sb->s_op->quota_read(sb, type, (char *)&dinfo, |
378 | sizeof(struct ocfs2_global_disk_dqinfo), | |
379 | OCFS2_GLOBAL_INFO_OFF); | |
ae4f6ef1 | 380 | ocfs2_qinfo_unlock(oinfo, 0); |
9e33d69f JK |
381 | ocfs2_unlock_global_qf(oinfo, 0); |
382 | if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
383 | mlog(ML_ERROR, "Cannot read global quota info (%d).\n", | |
384 | status); | |
385 | if (status >= 0) | |
386 | status = -EIO; | |
387 | mlog_errno(status); | |
388 | goto out_err; | |
389 | } | |
390 | info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); | |
391 | info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); | |
392 | oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); | |
393 | oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); | |
394 | oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); | |
395 | oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); | |
396 | oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; | |
397 | oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - | |
398 | OCFS2_QBLK_RESERVED_SPACE; | |
399 | oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi); | |
171bf93c MF |
400 | INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
401 | queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work, | |
4539f1df | 402 | msecs_to_jiffies(oinfo->dqi_syncms)); |
171bf93c | 403 | |
9e33d69f | 404 | out_err: |
c1e8d35e TM |
405 | if (status) |
406 | mlog_errno(status); | |
9e33d69f | 407 | return status; |
ae4f6ef1 JK |
408 | out_unlock: |
409 | ocfs2_unlock_global_qf(oinfo, 0); | |
410 | mlog_errno(status); | |
411 | goto out_err; | |
9e33d69f JK |
412 | } |
413 | ||
414 | /* Write information to global quota file. Expects exlusive lock on quota | |
415 | * file inode and quota info */ | |
416 | static int __ocfs2_global_write_info(struct super_block *sb, int type) | |
417 | { | |
418 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
419 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
420 | struct ocfs2_global_disk_dqinfo dinfo; | |
421 | ssize_t size; | |
422 | ||
423 | spin_lock(&dq_data_lock); | |
424 | info->dqi_flags &= ~DQF_INFO_DIRTY; | |
425 | dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); | |
426 | dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); | |
427 | spin_unlock(&dq_data_lock); | |
428 | dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms); | |
429 | dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks); | |
430 | dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk); | |
431 | dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry); | |
432 | size = sb->s_op->quota_write(sb, type, (char *)&dinfo, | |
433 | sizeof(struct ocfs2_global_disk_dqinfo), | |
434 | OCFS2_GLOBAL_INFO_OFF); | |
435 | if (size != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
436 | mlog(ML_ERROR, "Cannot write global quota info structure\n"); | |
437 | if (size >= 0) | |
438 | size = -EIO; | |
439 | return size; | |
440 | } | |
441 | return 0; | |
442 | } | |
443 | ||
444 | int ocfs2_global_write_info(struct super_block *sb, int type) | |
445 | { | |
446 | int err; | |
447 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
448 | ||
449 | err = ocfs2_qinfo_lock(info, 1); | |
450 | if (err < 0) | |
451 | return err; | |
452 | err = __ocfs2_global_write_info(sb, type); | |
453 | ocfs2_qinfo_unlock(info, 1); | |
454 | return err; | |
455 | } | |
456 | ||
b409d7a0 JK |
457 | static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
458 | { | |
459 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
460 | ||
461 | /* | |
462 | * We may need to allocate tree blocks and a leaf block but not the | |
463 | * root block | |
464 | */ | |
465 | return oinfo->dqi_gi.dqi_qtree_depth; | |
466 | } | |
467 | ||
468 | static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) | |
469 | { | |
832d09cf JK |
470 | /* We modify all the allocated blocks, tree root, info block and |
471 | * the inode */ | |
b409d7a0 | 472 | return (ocfs2_global_qinit_alloc(sb, type) + 2) * |
832d09cf | 473 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1; |
b409d7a0 JK |
474 | } |
475 | ||
9e33d69f JK |
476 | /* Sync local information about quota modifications with global quota file. |
477 | * Caller must have started the transaction and obtained exclusive lock for | |
478 | * global quota file inode */ | |
479 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) | |
480 | { | |
481 | int err, err2; | |
482 | struct super_block *sb = dquot->dq_sb; | |
483 | int type = dquot->dq_type; | |
484 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
485 | struct ocfs2_global_disk_dqblk dqblk; | |
486 | s64 spacechange, inodechange; | |
487 | time_t olditime, oldbtime; | |
488 | ||
489 | err = sb->s_op->quota_read(sb, type, (char *)&dqblk, | |
490 | sizeof(struct ocfs2_global_disk_dqblk), | |
491 | dquot->dq_off); | |
492 | if (err != sizeof(struct ocfs2_global_disk_dqblk)) { | |
493 | if (err >= 0) { | |
494 | mlog(ML_ERROR, "Short read from global quota file " | |
495 | "(%u read)\n", err); | |
496 | err = -EIO; | |
497 | } | |
498 | goto out; | |
499 | } | |
500 | ||
501 | /* Update space and inode usage. Get also other information from | |
502 | * global quota file so that we don't overwrite any changes there. | |
503 | * We are */ | |
504 | spin_lock(&dq_data_lock); | |
505 | spacechange = dquot->dq_dqb.dqb_curspace - | |
506 | OCFS2_DQUOT(dquot)->dq_origspace; | |
507 | inodechange = dquot->dq_dqb.dqb_curinodes - | |
508 | OCFS2_DQUOT(dquot)->dq_originodes; | |
509 | olditime = dquot->dq_dqb.dqb_itime; | |
510 | oldbtime = dquot->dq_dqb.dqb_btime; | |
511 | ocfs2_global_disk2memdqb(dquot, &dqblk); | |
9a2f3866 JK |
512 | mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n", |
513 | dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange, | |
514 | dquot->dq_dqb.dqb_curinodes, (long long)inodechange); | |
9e33d69f JK |
515 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
516 | dquot->dq_dqb.dqb_curspace += spacechange; | |
517 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
518 | dquot->dq_dqb.dqb_curinodes += inodechange; | |
519 | /* Set properly space grace time... */ | |
520 | if (dquot->dq_dqb.dqb_bsoftlimit && | |
521 | dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { | |
522 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && | |
523 | oldbtime > 0) { | |
524 | if (dquot->dq_dqb.dqb_btime > 0) | |
525 | dquot->dq_dqb.dqb_btime = | |
526 | min(dquot->dq_dqb.dqb_btime, oldbtime); | |
527 | else | |
528 | dquot->dq_dqb.dqb_btime = oldbtime; | |
529 | } | |
530 | } else { | |
531 | dquot->dq_dqb.dqb_btime = 0; | |
532 | clear_bit(DQ_BLKS_B, &dquot->dq_flags); | |
533 | } | |
534 | /* Set properly inode grace time... */ | |
535 | if (dquot->dq_dqb.dqb_isoftlimit && | |
536 | dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { | |
537 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && | |
538 | olditime > 0) { | |
539 | if (dquot->dq_dqb.dqb_itime > 0) | |
540 | dquot->dq_dqb.dqb_itime = | |
541 | min(dquot->dq_dqb.dqb_itime, olditime); | |
542 | else | |
543 | dquot->dq_dqb.dqb_itime = olditime; | |
544 | } | |
545 | } else { | |
546 | dquot->dq_dqb.dqb_itime = 0; | |
547 | clear_bit(DQ_INODES_B, &dquot->dq_flags); | |
548 | } | |
549 | /* All information is properly updated, clear the flags */ | |
550 | __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); | |
551 | __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); | |
552 | __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); | |
553 | __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); | |
554 | __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); | |
555 | __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); | |
556 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
557 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
558 | spin_unlock(&dq_data_lock); | |
559 | err = ocfs2_qinfo_lock(info, freeing); | |
560 | if (err < 0) { | |
561 | mlog(ML_ERROR, "Failed to lock quota info, loosing quota write" | |
562 | " (type=%d, id=%u)\n", dquot->dq_type, | |
563 | (unsigned)dquot->dq_id); | |
564 | goto out; | |
565 | } | |
566 | if (freeing) | |
567 | OCFS2_DQUOT(dquot)->dq_use_count--; | |
568 | err = qtree_write_dquot(&info->dqi_gi, dquot); | |
569 | if (err < 0) | |
570 | goto out_qlock; | |
571 | if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { | |
572 | err = qtree_release_dquot(&info->dqi_gi, dquot); | |
573 | if (info_dirty(sb_dqinfo(sb, type))) { | |
574 | err2 = __ocfs2_global_write_info(sb, type); | |
575 | if (!err) | |
576 | err = err2; | |
577 | } | |
578 | } | |
579 | out_qlock: | |
580 | ocfs2_qinfo_unlock(info, freeing); | |
581 | out: | |
582 | if (err < 0) | |
583 | mlog_errno(err); | |
584 | return err; | |
585 | } | |
586 | ||
171bf93c MF |
587 | /* |
588 | * Functions for periodic syncing of dquots with global file | |
589 | */ | |
590 | static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) | |
591 | { | |
592 | handle_t *handle; | |
593 | struct super_block *sb = dquot->dq_sb; | |
594 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
595 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
596 | int status = 0; | |
597 | ||
ef6b689b | 598 | mlog(0, "id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id, |
171bf93c MF |
599 | dquot->dq_type, type, sb->s_id); |
600 | if (type != dquot->dq_type) | |
601 | goto out; | |
602 | status = ocfs2_lock_global_qf(oinfo, 1); | |
603 | if (status < 0) | |
604 | goto out; | |
605 | ||
606 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
607 | if (IS_ERR(handle)) { | |
608 | status = PTR_ERR(handle); | |
609 | mlog_errno(status); | |
610 | goto out_ilock; | |
611 | } | |
612 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); | |
613 | status = ocfs2_sync_dquot(dquot); | |
171bf93c MF |
614 | if (status < 0) |
615 | mlog_errno(status); | |
616 | /* We have to write local structure as well... */ | |
741e1289 | 617 | status = ocfs2_local_write_dquot(dquot); |
171bf93c MF |
618 | if (status < 0) |
619 | mlog_errno(status); | |
741e1289 | 620 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
171bf93c MF |
621 | ocfs2_commit_trans(osb, handle); |
622 | out_ilock: | |
623 | ocfs2_unlock_global_qf(oinfo, 1); | |
624 | out: | |
171bf93c MF |
625 | return status; |
626 | } | |
627 | ||
628 | static void qsync_work_fn(struct work_struct *work) | |
629 | { | |
630 | struct ocfs2_mem_dqinfo *oinfo = container_of(work, | |
631 | struct ocfs2_mem_dqinfo, | |
632 | dqi_sync_work.work); | |
633 | struct super_block *sb = oinfo->dqi_gqinode->i_sb; | |
634 | ||
635 | dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); | |
636 | queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work, | |
4539f1df | 637 | msecs_to_jiffies(oinfo->dqi_syncms)); |
171bf93c MF |
638 | } |
639 | ||
9e33d69f JK |
640 | /* |
641 | * Wrappers for generic quota functions | |
642 | */ | |
643 | ||
644 | static int ocfs2_write_dquot(struct dquot *dquot) | |
645 | { | |
646 | handle_t *handle; | |
647 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
648 | int status = 0; | |
649 | ||
ef6b689b | 650 | mlog(0, "id=%u, type=%d", dquot->dq_id, dquot->dq_type); |
9e33d69f JK |
651 | |
652 | handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); | |
653 | if (IS_ERR(handle)) { | |
654 | status = PTR_ERR(handle); | |
655 | mlog_errno(status); | |
656 | goto out; | |
657 | } | |
741e1289 JK |
658 | mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
659 | status = ocfs2_local_write_dquot(dquot); | |
660 | mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); | |
9e33d69f JK |
661 | ocfs2_commit_trans(osb, handle); |
662 | out: | |
9e33d69f JK |
663 | return status; |
664 | } | |
665 | ||
b409d7a0 | 666 | static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
9e33d69f | 667 | { |
b409d7a0 | 668 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
0584974a JK |
669 | /* |
670 | * We modify tree, leaf block, global info, local chunk header, | |
671 | * global and local inode; OCFS2_QINFO_WRITE_CREDITS already | |
672 | * accounts for inode update | |
673 | */ | |
b409d7a0 JK |
674 | return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
675 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + | |
0584974a | 676 | OCFS2_QINFO_WRITE_CREDITS + |
0584974a | 677 | OCFS2_INODE_UPDATE_CREDITS; |
9e33d69f JK |
678 | } |
679 | ||
680 | static int ocfs2_release_dquot(struct dquot *dquot) | |
681 | { | |
682 | handle_t *handle; | |
683 | struct ocfs2_mem_dqinfo *oinfo = | |
684 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
685 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
686 | int status = 0; | |
687 | ||
ef6b689b | 688 | mlog(0, "id=%u, type=%d", dquot->dq_id, dquot->dq_type); |
9e33d69f | 689 | |
fb8dd8d7 JK |
690 | mutex_lock(&dquot->dq_lock); |
691 | /* Check whether we are not racing with some other dqget() */ | |
692 | if (atomic_read(&dquot->dq_count) > 1) | |
693 | goto out; | |
9e33d69f JK |
694 | status = ocfs2_lock_global_qf(oinfo, 1); |
695 | if (status < 0) | |
696 | goto out; | |
697 | handle = ocfs2_start_trans(osb, | |
698 | ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type)); | |
699 | if (IS_ERR(handle)) { | |
700 | status = PTR_ERR(handle); | |
701 | mlog_errno(status); | |
702 | goto out_ilock; | |
703 | } | |
fb8dd8d7 JK |
704 | |
705 | status = ocfs2_global_release_dquot(dquot); | |
706 | if (status < 0) { | |
707 | mlog_errno(status); | |
708 | goto out_trans; | |
709 | } | |
710 | status = ocfs2_local_release_dquot(handle, dquot); | |
711 | /* | |
712 | * If we fail here, we cannot do much as global structure is | |
713 | * already released. So just complain... | |
714 | */ | |
715 | if (status < 0) | |
716 | mlog_errno(status); | |
717 | clear_bit(DQ_ACTIVE_B, &dquot->dq_flags); | |
718 | out_trans: | |
9e33d69f JK |
719 | ocfs2_commit_trans(osb, handle); |
720 | out_ilock: | |
721 | ocfs2_unlock_global_qf(oinfo, 1); | |
722 | out: | |
fb8dd8d7 | 723 | mutex_unlock(&dquot->dq_lock); |
c1e8d35e TM |
724 | if (status) |
725 | mlog_errno(status); | |
9e33d69f JK |
726 | return status; |
727 | } | |
728 | ||
fb8dd8d7 JK |
729 | /* |
730 | * Read global dquot structure from disk or create it if it does | |
731 | * not exist. Also update use count of the global structure and | |
732 | * create structure in node-local quota file. | |
733 | */ | |
9e33d69f JK |
734 | static int ocfs2_acquire_dquot(struct dquot *dquot) |
735 | { | |
fb8dd8d7 JK |
736 | int status = 0, err; |
737 | int ex = 0; | |
738 | struct super_block *sb = dquot->dq_sb; | |
739 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
740 | int type = dquot->dq_type; | |
741 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
742 | struct inode *gqinode = info->dqi_gqinode; | |
743 | int need_alloc = ocfs2_global_qinit_alloc(sb, type); | |
744 | handle_t *handle; | |
9e33d69f | 745 | |
ef6b689b | 746 | mlog(0, "id=%u, type=%d", dquot->dq_id, type); |
fb8dd8d7 JK |
747 | mutex_lock(&dquot->dq_lock); |
748 | /* | |
749 | * We need an exclusive lock, because we're going to update use count | |
750 | * and instantiate possibly new dquot structure | |
751 | */ | |
752 | status = ocfs2_lock_global_qf(info, 1); | |
9e33d69f JK |
753 | if (status < 0) |
754 | goto out; | |
fb8dd8d7 JK |
755 | if (!test_bit(DQ_READ_B, &dquot->dq_flags)) { |
756 | status = ocfs2_qinfo_lock(info, 0); | |
757 | if (status < 0) | |
758 | goto out_dq; | |
759 | status = qtree_read_dquot(&info->dqi_gi, dquot); | |
760 | ocfs2_qinfo_unlock(info, 0); | |
761 | if (status < 0) | |
762 | goto out_dq; | |
763 | } | |
764 | set_bit(DQ_READ_B, &dquot->dq_flags); | |
765 | ||
766 | OCFS2_DQUOT(dquot)->dq_use_count++; | |
767 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
768 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
769 | if (!dquot->dq_off) { /* No real quota entry? */ | |
770 | ex = 1; | |
771 | /* | |
772 | * Add blocks to quota file before we start a transaction since | |
773 | * locking allocators ranks above a transaction start | |
774 | */ | |
775 | WARN_ON(journal_current_handle()); | |
5693486b | 776 | status = ocfs2_extend_no_holes(gqinode, NULL, |
fb8dd8d7 JK |
777 | gqinode->i_size + (need_alloc << sb->s_blocksize_bits), |
778 | gqinode->i_size); | |
779 | if (status < 0) | |
780 | goto out_dq; | |
781 | } | |
782 | ||
783 | handle = ocfs2_start_trans(osb, | |
784 | ocfs2_calc_global_qinit_credits(sb, type)); | |
785 | if (IS_ERR(handle)) { | |
786 | status = PTR_ERR(handle); | |
787 | goto out_dq; | |
788 | } | |
789 | status = ocfs2_qinfo_lock(info, ex); | |
790 | if (status < 0) | |
791 | goto out_trans; | |
792 | status = qtree_write_dquot(&info->dqi_gi, dquot); | |
793 | if (ex && info_dirty(sb_dqinfo(sb, type))) { | |
794 | err = __ocfs2_global_write_info(sb, type); | |
795 | if (!status) | |
796 | status = err; | |
797 | } | |
798 | ocfs2_qinfo_unlock(info, ex); | |
799 | out_trans: | |
800 | ocfs2_commit_trans(osb, handle); | |
801 | out_dq: | |
802 | ocfs2_unlock_global_qf(info, 1); | |
803 | if (status < 0) | |
804 | goto out; | |
805 | ||
806 | status = ocfs2_create_local_dquot(dquot); | |
807 | if (status < 0) | |
808 | goto out; | |
809 | set_bit(DQ_ACTIVE_B, &dquot->dq_flags); | |
9e33d69f | 810 | out: |
fb8dd8d7 | 811 | mutex_unlock(&dquot->dq_lock); |
c1e8d35e TM |
812 | if (status) |
813 | mlog_errno(status); | |
9e33d69f JK |
814 | return status; |
815 | } | |
816 | ||
817 | static int ocfs2_mark_dquot_dirty(struct dquot *dquot) | |
818 | { | |
819 | unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | | |
820 | (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | | |
821 | (1 << (DQ_LASTSET_B + QIF_INODES_B)) | | |
822 | (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | | |
823 | (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | | |
824 | (1 << (DQ_LASTSET_B + QIF_ITIME_B)); | |
825 | int sync = 0; | |
826 | int status; | |
827 | struct super_block *sb = dquot->dq_sb; | |
828 | int type = dquot->dq_type; | |
829 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
830 | handle_t *handle; | |
831 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
832 | ||
ef6b689b | 833 | mlog(0, "id=%u, type=%d", dquot->dq_id, type); |
9e33d69f JK |
834 | |
835 | /* In case user set some limits, sync dquot immediately to global | |
836 | * quota file so that information propagates quicker */ | |
837 | spin_lock(&dq_data_lock); | |
838 | if (dquot->dq_flags & mask) | |
839 | sync = 1; | |
840 | spin_unlock(&dq_data_lock); | |
f8afead7 JK |
841 | /* This is a slight hack but we can't afford getting global quota |
842 | * lock if we already have a transaction started. */ | |
843 | if (!sync || journal_current_handle()) { | |
9e33d69f JK |
844 | status = ocfs2_write_dquot(dquot); |
845 | goto out; | |
846 | } | |
847 | status = ocfs2_lock_global_qf(oinfo, 1); | |
848 | if (status < 0) | |
849 | goto out; | |
850 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
851 | if (IS_ERR(handle)) { | |
852 | status = PTR_ERR(handle); | |
853 | mlog_errno(status); | |
854 | goto out_ilock; | |
855 | } | |
fb8dd8d7 | 856 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
857 | status = ocfs2_sync_dquot(dquot); |
858 | if (status < 0) { | |
859 | mlog_errno(status); | |
741e1289 | 860 | goto out_dlock; |
9e33d69f JK |
861 | } |
862 | /* Now write updated local dquot structure */ | |
741e1289 JK |
863 | status = ocfs2_local_write_dquot(dquot); |
864 | out_dlock: | |
865 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
9e33d69f JK |
866 | ocfs2_commit_trans(osb, handle); |
867 | out_ilock: | |
868 | ocfs2_unlock_global_qf(oinfo, 1); | |
869 | out: | |
c1e8d35e TM |
870 | if (status) |
871 | mlog_errno(status); | |
9e33d69f JK |
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 | ||
9e33d69f JK |
882 | status = ocfs2_lock_global_qf(oinfo, 1); |
883 | if (status < 0) | |
884 | goto out; | |
885 | handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); | |
886 | if (IS_ERR(handle)) { | |
887 | status = PTR_ERR(handle); | |
888 | mlog_errno(status); | |
889 | goto out_ilock; | |
890 | } | |
891 | status = dquot_commit_info(sb, type); | |
892 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
893 | out_ilock: | |
894 | ocfs2_unlock_global_qf(oinfo, 1); | |
895 | out: | |
c1e8d35e TM |
896 | if (status) |
897 | mlog_errno(status); | |
9e33d69f JK |
898 | return status; |
899 | } | |
900 | ||
9e33d69f JK |
901 | static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
902 | { | |
903 | struct ocfs2_dquot *dquot = | |
904 | kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS); | |
905 | ||
906 | if (!dquot) | |
907 | return NULL; | |
908 | return &dquot->dq_dquot; | |
909 | } | |
910 | ||
911 | static void ocfs2_destroy_dquot(struct dquot *dquot) | |
912 | { | |
913 | kmem_cache_free(ocfs2_dquot_cachep, dquot); | |
914 | } | |
915 | ||
61e225dc | 916 | const struct dquot_operations ocfs2_quota_operations = { |
741e1289 | 917 | /* We never make dquot dirty so .write_dquot is never called */ |
9e33d69f JK |
918 | .acquire_dquot = ocfs2_acquire_dquot, |
919 | .release_dquot = ocfs2_release_dquot, | |
920 | .mark_dirty = ocfs2_mark_dquot_dirty, | |
921 | .write_info = ocfs2_write_info, | |
922 | .alloc_dquot = ocfs2_alloc_dquot, | |
923 | .destroy_dquot = ocfs2_destroy_dquot, | |
924 | }; | |
171bf93c MF |
925 | |
926 | int ocfs2_quota_setup(void) | |
927 | { | |
928 | ocfs2_quota_wq = create_workqueue("o2quot"); | |
929 | if (!ocfs2_quota_wq) | |
930 | return -ENOMEM; | |
931 | return 0; | |
932 | } | |
933 | ||
934 | void ocfs2_quota_shutdown(void) | |
935 | { | |
936 | if (ocfs2_quota_wq) { | |
937 | flush_workqueue(ocfs2_quota_wq); | |
938 | destroy_workqueue(ocfs2_quota_wq); | |
939 | ocfs2_quota_wq = NULL; | |
940 | } | |
941 | } |