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 | 13 | |
9e33d69f JK |
14 | #include <cluster/masklog.h> |
15 | ||
16 | #include "ocfs2_fs.h" | |
17 | #include "ocfs2.h" | |
18 | #include "alloc.h" | |
d6b32bbb | 19 | #include "blockcheck.h" |
9e33d69f JK |
20 | #include "inode.h" |
21 | #include "journal.h" | |
22 | #include "file.h" | |
23 | #include "sysfile.h" | |
24 | #include "dlmglue.h" | |
25 | #include "uptodate.h" | |
ada50827 | 26 | #include "super.h" |
f64dd44e | 27 | #include "buffer_head_io.h" |
9e33d69f | 28 | #include "quota.h" |
1db986a8 | 29 | #include "ocfs2_trace.h" |
9e33d69f | 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 void qsync_work_fn(struct work_struct *work); |
67 | ||
9e33d69f JK |
68 | static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp) |
69 | { | |
70 | struct ocfs2_global_disk_dqblk *d = dp; | |
71 | struct mem_dqblk *m = &dquot->dq_dqb; | |
72 | ||
73 | /* Update from disk only entries not set by the admin */ | |
74 | if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) { | |
75 | m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); | |
76 | m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); | |
77 | } | |
78 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
79 | m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); | |
80 | if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) { | |
81 | m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit); | |
82 | m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit); | |
83 | } | |
84 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) | |
85 | m->dqb_curspace = le64_to_cpu(d->dqb_curspace); | |
86 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags)) | |
87 | m->dqb_btime = le64_to_cpu(d->dqb_btime); | |
88 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags)) | |
89 | m->dqb_itime = le64_to_cpu(d->dqb_itime); | |
90 | OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count); | |
91 | } | |
92 | ||
93 | static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot) | |
94 | { | |
95 | struct ocfs2_global_disk_dqblk *d = dp; | |
96 | struct mem_dqblk *m = &dquot->dq_dqb; | |
97 | ||
98 | d->dqb_id = cpu_to_le32(dquot->dq_id); | |
99 | d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count); | |
100 | d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); | |
101 | d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); | |
102 | d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); | |
103 | d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit); | |
104 | d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit); | |
105 | d->dqb_curspace = cpu_to_le64(m->dqb_curspace); | |
106 | d->dqb_btime = cpu_to_le64(m->dqb_btime); | |
107 | d->dqb_itime = cpu_to_le64(m->dqb_itime); | |
7669f54c | 108 | d->dqb_pad1 = d->dqb_pad2 = 0; |
9e33d69f JK |
109 | } |
110 | ||
111 | static int ocfs2_global_is_id(void *dp, struct dquot *dquot) | |
112 | { | |
113 | struct ocfs2_global_disk_dqblk *d = dp; | |
114 | struct ocfs2_mem_dqinfo *oinfo = | |
115 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
116 | ||
117 | if (qtree_entry_unused(&oinfo->dqi_gi, dp)) | |
118 | return 0; | |
119 | return le32_to_cpu(d->dqb_id) == dquot->dq_id; | |
120 | } | |
121 | ||
122 | struct qtree_fmt_operations ocfs2_global_ops = { | |
123 | .mem2disk_dqblk = ocfs2_global_mem2diskdqb, | |
124 | .disk2mem_dqblk = ocfs2_global_disk2memdqb, | |
125 | .is_id = ocfs2_global_is_id, | |
126 | }; | |
127 | ||
fb8dd8d7 | 128 | int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh) |
684ef278 | 129 | { |
d6b32bbb JB |
130 | struct ocfs2_disk_dqtrailer *dqt = |
131 | ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data); | |
684ef278 | 132 | |
1db986a8 | 133 | trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr); |
684ef278 | 134 | |
d6b32bbb JB |
135 | BUG_ON(!buffer_uptodate(bh)); |
136 | ||
137 | /* | |
138 | * If the ecc fails, we return the error but otherwise | |
139 | * leave the filesystem running. We know any error is | |
140 | * local to this block. | |
141 | */ | |
142 | return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check); | |
684ef278 JB |
143 | } |
144 | ||
f64dd44e JK |
145 | int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
146 | struct buffer_head **bhp) | |
147 | { | |
148 | int rc; | |
149 | ||
150 | *bhp = NULL; | |
151 | rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0, | |
152 | ocfs2_validate_quota_block); | |
153 | if (rc) | |
154 | mlog_errno(rc); | |
155 | return rc; | |
156 | } | |
157 | ||
9e33d69f JK |
158 | /* Read data from global quotafile - avoid pagecache and such because we cannot |
159 | * afford acquiring the locks... We use quota cluster lock to serialize | |
160 | * operations. Caller is responsible for acquiring it. */ | |
161 | ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, | |
162 | size_t len, loff_t off) | |
163 | { | |
164 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
165 | struct inode *gqinode = oinfo->dqi_gqinode; | |
166 | loff_t i_size = i_size_read(gqinode); | |
167 | int offset = off & (sb->s_blocksize - 1); | |
168 | sector_t blk = off >> sb->s_blocksize_bits; | |
169 | int err = 0; | |
170 | struct buffer_head *bh; | |
171 | size_t toread, tocopy; | |
fb8dd8d7 | 172 | u64 pblock = 0, pcount = 0; |
9e33d69f JK |
173 | |
174 | if (off > i_size) | |
175 | return 0; | |
176 | if (off + len > i_size) | |
177 | len = i_size - off; | |
178 | toread = len; | |
179 | while (toread > 0) { | |
dad7d975 | 180 | tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
fb8dd8d7 JK |
181 | if (!pcount) { |
182 | err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, | |
183 | &pcount, NULL); | |
184 | if (err) { | |
185 | mlog_errno(err); | |
186 | return err; | |
187 | } | |
188 | } else { | |
189 | pcount--; | |
190 | pblock++; | |
191 | } | |
85eb8b73 | 192 | bh = NULL; |
fb8dd8d7 | 193 | err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
85eb8b73 | 194 | if (err) { |
9e33d69f JK |
195 | mlog_errno(err); |
196 | return err; | |
197 | } | |
198 | memcpy(data, bh->b_data + offset, tocopy); | |
199 | brelse(bh); | |
200 | offset = 0; | |
201 | toread -= tocopy; | |
202 | data += tocopy; | |
203 | blk++; | |
204 | } | |
205 | return len; | |
206 | } | |
207 | ||
208 | /* Write to quotafile (we know the transaction is already started and has | |
209 | * enough credits) */ | |
210 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, | |
211 | const char *data, size_t len, loff_t off) | |
212 | { | |
213 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
214 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
215 | struct inode *gqinode = oinfo->dqi_gqinode; | |
216 | int offset = off & (sb->s_blocksize - 1); | |
217 | sector_t blk = off >> sb->s_blocksize_bits; | |
af09e51b | 218 | int err = 0, new = 0, ja_type; |
85eb8b73 | 219 | struct buffer_head *bh = NULL; |
9e33d69f | 220 | handle_t *handle = journal_current_handle(); |
fb8dd8d7 | 221 | u64 pblock, pcount; |
9e33d69f JK |
222 | |
223 | if (!handle) { | |
224 | mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled " | |
225 | "because transaction was not started.\n", | |
226 | (unsigned long long)off, (unsigned long long)len); | |
227 | return -EIO; | |
228 | } | |
229 | if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) { | |
230 | WARN_ON(1); | |
231 | len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset; | |
232 | } | |
233 | ||
9e33d69f | 234 | if (gqinode->i_size < off + len) { |
b57ac2c4 JK |
235 | loff_t rounded_end = |
236 | ocfs2_align_bytes_to_blocks(sb, off + len); | |
237 | ||
fb8dd8d7 | 238 | /* Space is already allocated in ocfs2_acquire_dquot() */ |
9e33d69f JK |
239 | err = ocfs2_simple_size_update(gqinode, |
240 | oinfo->dqi_gqi_bh, | |
b57ac2c4 | 241 | rounded_end); |
9e33d69f JK |
242 | if (err < 0) |
243 | goto out; | |
244 | new = 1; | |
245 | } | |
fb8dd8d7 JK |
246 | err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL); |
247 | if (err) { | |
248 | mlog_errno(err); | |
249 | goto out; | |
250 | } | |
9e33d69f JK |
251 | /* Not rewriting whole block? */ |
252 | if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) && | |
253 | !new) { | |
fb8dd8d7 | 254 | err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
af09e51b | 255 | ja_type = OCFS2_JOURNAL_ACCESS_WRITE; |
9e33d69f | 256 | } else { |
fb8dd8d7 JK |
257 | bh = sb_getblk(sb, pblock); |
258 | if (!bh) | |
259 | err = -ENOMEM; | |
af09e51b | 260 | ja_type = OCFS2_JOURNAL_ACCESS_CREATE; |
9e33d69f | 261 | } |
af09e51b JK |
262 | if (err) { |
263 | mlog_errno(err); | |
e9956fae | 264 | goto out; |
9e33d69f JK |
265 | } |
266 | lock_buffer(bh); | |
267 | if (new) | |
268 | memset(bh->b_data, 0, sb->s_blocksize); | |
269 | memcpy(bh->b_data + offset, data, len); | |
270 | flush_dcache_page(bh->b_page); | |
af09e51b | 271 | set_buffer_uptodate(bh); |
9e33d69f | 272 | unlock_buffer(bh); |
8cb471e8 | 273 | ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh); |
0cf2f763 JB |
274 | err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh, |
275 | ja_type); | |
af09e51b JK |
276 | if (err < 0) { |
277 | brelse(bh); | |
278 | goto out; | |
279 | } | |
ec20cec7 | 280 | ocfs2_journal_dirty(handle, bh); |
9e33d69f | 281 | brelse(bh); |
9e33d69f JK |
282 | out: |
283 | if (err) { | |
9e33d69f JK |
284 | mlog_errno(err); |
285 | return err; | |
286 | } | |
287 | gqinode->i_version++; | |
288 | ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh); | |
9e33d69f JK |
289 | return len; |
290 | } | |
291 | ||
292 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) | |
293 | { | |
294 | int status; | |
295 | struct buffer_head *bh = NULL; | |
296 | ||
297 | status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex); | |
298 | if (status < 0) | |
299 | return status; | |
300 | spin_lock(&dq_data_lock); | |
301 | if (!oinfo->dqi_gqi_count++) | |
302 | oinfo->dqi_gqi_bh = bh; | |
303 | else | |
304 | WARN_ON(bh != oinfo->dqi_gqi_bh); | |
305 | spin_unlock(&dq_data_lock); | |
fb8dd8d7 JK |
306 | if (ex) { |
307 | mutex_lock(&oinfo->dqi_gqinode->i_mutex); | |
308 | down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
309 | } else { | |
310 | down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
311 | } | |
9e33d69f JK |
312 | return 0; |
313 | } | |
314 | ||
315 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) | |
316 | { | |
fb8dd8d7 JK |
317 | if (ex) { |
318 | up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
319 | mutex_unlock(&oinfo->dqi_gqinode->i_mutex); | |
320 | } else { | |
321 | up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); | |
322 | } | |
9e33d69f JK |
323 | ocfs2_inode_unlock(oinfo->dqi_gqinode, ex); |
324 | brelse(oinfo->dqi_gqi_bh); | |
325 | spin_lock(&dq_data_lock); | |
326 | if (!--oinfo->dqi_gqi_count) | |
327 | oinfo->dqi_gqi_bh = NULL; | |
328 | spin_unlock(&dq_data_lock); | |
329 | } | |
330 | ||
331 | /* Read information header from global quota file */ | |
332 | int ocfs2_global_read_info(struct super_block *sb, int type) | |
333 | { | |
334 | struct inode *gqinode = NULL; | |
335 | unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, | |
336 | GROUP_QUOTA_SYSTEM_INODE }; | |
337 | struct ocfs2_global_disk_dqinfo dinfo; | |
338 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
339 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
ae4f6ef1 | 340 | u64 pcount; |
9e33d69f JK |
341 | int status; |
342 | ||
9e33d69f JK |
343 | /* Read global header */ |
344 | gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], | |
345 | OCFS2_INVALID_SLOT); | |
346 | if (!gqinode) { | |
347 | mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n", | |
348 | type); | |
349 | status = -EINVAL; | |
350 | goto out_err; | |
351 | } | |
352 | oinfo->dqi_gi.dqi_sb = sb; | |
353 | oinfo->dqi_gi.dqi_type = type; | |
354 | ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo); | |
355 | oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); | |
356 | oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; | |
357 | oinfo->dqi_gqi_bh = NULL; | |
358 | oinfo->dqi_gqi_count = 0; | |
359 | oinfo->dqi_gqinode = gqinode; | |
360 | status = ocfs2_lock_global_qf(oinfo, 0); | |
361 | if (status < 0) { | |
362 | mlog_errno(status); | |
363 | goto out_err; | |
364 | } | |
ae4f6ef1 JK |
365 | |
366 | status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk, | |
367 | &pcount, NULL); | |
368 | if (status < 0) | |
369 | goto out_unlock; | |
370 | ||
371 | status = ocfs2_qinfo_lock(oinfo, 0); | |
372 | if (status < 0) | |
373 | goto out_unlock; | |
9e33d69f JK |
374 | status = sb->s_op->quota_read(sb, type, (char *)&dinfo, |
375 | sizeof(struct ocfs2_global_disk_dqinfo), | |
376 | OCFS2_GLOBAL_INFO_OFF); | |
ae4f6ef1 | 377 | ocfs2_qinfo_unlock(oinfo, 0); |
9e33d69f JK |
378 | ocfs2_unlock_global_qf(oinfo, 0); |
379 | if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
380 | mlog(ML_ERROR, "Cannot read global quota info (%d).\n", | |
381 | status); | |
382 | if (status >= 0) | |
383 | status = -EIO; | |
384 | mlog_errno(status); | |
385 | goto out_err; | |
386 | } | |
387 | info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); | |
388 | info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); | |
389 | oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); | |
390 | oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); | |
391 | oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); | |
392 | oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); | |
393 | oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; | |
394 | oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - | |
395 | OCFS2_QBLK_RESERVED_SPACE; | |
396 | oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi); | |
171bf93c | 397 | INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
316873c9 TH |
398 | schedule_delayed_work(&oinfo->dqi_sync_work, |
399 | msecs_to_jiffies(oinfo->dqi_syncms)); | |
171bf93c | 400 | |
9e33d69f | 401 | out_err: |
c1e8d35e TM |
402 | if (status) |
403 | mlog_errno(status); | |
9e33d69f | 404 | return status; |
ae4f6ef1 JK |
405 | out_unlock: |
406 | ocfs2_unlock_global_qf(oinfo, 0); | |
407 | mlog_errno(status); | |
408 | goto out_err; | |
9e33d69f JK |
409 | } |
410 | ||
411 | /* Write information to global quota file. Expects exlusive lock on quota | |
412 | * file inode and quota info */ | |
413 | static int __ocfs2_global_write_info(struct super_block *sb, int type) | |
414 | { | |
415 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
416 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
417 | struct ocfs2_global_disk_dqinfo dinfo; | |
418 | ssize_t size; | |
419 | ||
420 | spin_lock(&dq_data_lock); | |
421 | info->dqi_flags &= ~DQF_INFO_DIRTY; | |
422 | dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); | |
423 | dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); | |
424 | spin_unlock(&dq_data_lock); | |
425 | dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms); | |
426 | dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks); | |
427 | dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk); | |
428 | dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry); | |
429 | size = sb->s_op->quota_write(sb, type, (char *)&dinfo, | |
430 | sizeof(struct ocfs2_global_disk_dqinfo), | |
431 | OCFS2_GLOBAL_INFO_OFF); | |
432 | if (size != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
433 | mlog(ML_ERROR, "Cannot write global quota info structure\n"); | |
434 | if (size >= 0) | |
435 | size = -EIO; | |
436 | return size; | |
437 | } | |
438 | return 0; | |
439 | } | |
440 | ||
441 | int ocfs2_global_write_info(struct super_block *sb, int type) | |
442 | { | |
443 | int err; | |
444 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
445 | ||
446 | err = ocfs2_qinfo_lock(info, 1); | |
447 | if (err < 0) | |
448 | return err; | |
449 | err = __ocfs2_global_write_info(sb, type); | |
450 | ocfs2_qinfo_unlock(info, 1); | |
451 | return err; | |
452 | } | |
453 | ||
b409d7a0 JK |
454 | static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
455 | { | |
456 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
457 | ||
458 | /* | |
459 | * We may need to allocate tree blocks and a leaf block but not the | |
460 | * root block | |
461 | */ | |
462 | return oinfo->dqi_gi.dqi_qtree_depth; | |
463 | } | |
464 | ||
465 | static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) | |
466 | { | |
832d09cf JK |
467 | /* We modify all the allocated blocks, tree root, info block and |
468 | * the inode */ | |
b409d7a0 | 469 | return (ocfs2_global_qinit_alloc(sb, type) + 2) * |
832d09cf | 470 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1; |
b409d7a0 JK |
471 | } |
472 | ||
9e33d69f JK |
473 | /* Sync local information about quota modifications with global quota file. |
474 | * Caller must have started the transaction and obtained exclusive lock for | |
475 | * global quota file inode */ | |
476 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) | |
477 | { | |
478 | int err, err2; | |
479 | struct super_block *sb = dquot->dq_sb; | |
480 | int type = dquot->dq_type; | |
481 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
482 | struct ocfs2_global_disk_dqblk dqblk; | |
483 | s64 spacechange, inodechange; | |
484 | time_t olditime, oldbtime; | |
485 | ||
486 | err = sb->s_op->quota_read(sb, type, (char *)&dqblk, | |
487 | sizeof(struct ocfs2_global_disk_dqblk), | |
488 | dquot->dq_off); | |
489 | if (err != sizeof(struct ocfs2_global_disk_dqblk)) { | |
490 | if (err >= 0) { | |
491 | mlog(ML_ERROR, "Short read from global quota file " | |
492 | "(%u read)\n", err); | |
493 | err = -EIO; | |
494 | } | |
495 | goto out; | |
496 | } | |
497 | ||
498 | /* Update space and inode usage. Get also other information from | |
499 | * global quota file so that we don't overwrite any changes there. | |
500 | * We are */ | |
501 | spin_lock(&dq_data_lock); | |
502 | spacechange = dquot->dq_dqb.dqb_curspace - | |
503 | OCFS2_DQUOT(dquot)->dq_origspace; | |
504 | inodechange = dquot->dq_dqb.dqb_curinodes - | |
505 | OCFS2_DQUOT(dquot)->dq_originodes; | |
506 | olditime = dquot->dq_dqb.dqb_itime; | |
507 | oldbtime = dquot->dq_dqb.dqb_btime; | |
508 | ocfs2_global_disk2memdqb(dquot, &dqblk); | |
1db986a8 TM |
509 | trace_ocfs2_sync_dquot(dquot->dq_id, dquot->dq_dqb.dqb_curspace, |
510 | (long long)spacechange, | |
511 | dquot->dq_dqb.dqb_curinodes, | |
512 | (long long)inodechange); | |
9e33d69f JK |
513 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
514 | dquot->dq_dqb.dqb_curspace += spacechange; | |
515 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
516 | dquot->dq_dqb.dqb_curinodes += inodechange; | |
517 | /* Set properly space grace time... */ | |
518 | if (dquot->dq_dqb.dqb_bsoftlimit && | |
519 | dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { | |
520 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && | |
521 | oldbtime > 0) { | |
522 | if (dquot->dq_dqb.dqb_btime > 0) | |
523 | dquot->dq_dqb.dqb_btime = | |
524 | min(dquot->dq_dqb.dqb_btime, oldbtime); | |
525 | else | |
526 | dquot->dq_dqb.dqb_btime = oldbtime; | |
527 | } | |
528 | } else { | |
529 | dquot->dq_dqb.dqb_btime = 0; | |
530 | clear_bit(DQ_BLKS_B, &dquot->dq_flags); | |
531 | } | |
532 | /* Set properly inode grace time... */ | |
533 | if (dquot->dq_dqb.dqb_isoftlimit && | |
534 | dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { | |
535 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && | |
536 | olditime > 0) { | |
537 | if (dquot->dq_dqb.dqb_itime > 0) | |
538 | dquot->dq_dqb.dqb_itime = | |
539 | min(dquot->dq_dqb.dqb_itime, olditime); | |
540 | else | |
541 | dquot->dq_dqb.dqb_itime = olditime; | |
542 | } | |
543 | } else { | |
544 | dquot->dq_dqb.dqb_itime = 0; | |
545 | clear_bit(DQ_INODES_B, &dquot->dq_flags); | |
546 | } | |
547 | /* All information is properly updated, clear the flags */ | |
548 | __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); | |
549 | __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); | |
550 | __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); | |
551 | __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); | |
552 | __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); | |
553 | __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); | |
554 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
555 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
556 | spin_unlock(&dq_data_lock); | |
557 | err = ocfs2_qinfo_lock(info, freeing); | |
558 | if (err < 0) { | |
25985edc | 559 | mlog(ML_ERROR, "Failed to lock quota info, losing quota write" |
9e33d69f JK |
560 | " (type=%d, id=%u)\n", dquot->dq_type, |
561 | (unsigned)dquot->dq_id); | |
562 | goto out; | |
563 | } | |
564 | if (freeing) | |
565 | OCFS2_DQUOT(dquot)->dq_use_count--; | |
566 | err = qtree_write_dquot(&info->dqi_gi, dquot); | |
567 | if (err < 0) | |
568 | goto out_qlock; | |
569 | if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { | |
570 | err = qtree_release_dquot(&info->dqi_gi, dquot); | |
571 | if (info_dirty(sb_dqinfo(sb, type))) { | |
572 | err2 = __ocfs2_global_write_info(sb, type); | |
573 | if (!err) | |
574 | err = err2; | |
575 | } | |
576 | } | |
577 | out_qlock: | |
578 | ocfs2_qinfo_unlock(info, freeing); | |
579 | out: | |
580 | if (err < 0) | |
581 | mlog_errno(err); | |
582 | return err; | |
583 | } | |
584 | ||
171bf93c MF |
585 | /* |
586 | * Functions for periodic syncing of dquots with global file | |
587 | */ | |
588 | static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) | |
589 | { | |
590 | handle_t *handle; | |
591 | struct super_block *sb = dquot->dq_sb; | |
592 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
593 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
594 | int status = 0; | |
595 | ||
1db986a8 TM |
596 | trace_ocfs2_sync_dquot_helper(dquot->dq_id, dquot->dq_type, |
597 | type, sb->s_id); | |
171bf93c MF |
598 | if (type != dquot->dq_type) |
599 | goto out; | |
600 | status = ocfs2_lock_global_qf(oinfo, 1); | |
601 | if (status < 0) | |
602 | goto out; | |
603 | ||
604 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
605 | if (IS_ERR(handle)) { | |
606 | status = PTR_ERR(handle); | |
607 | mlog_errno(status); | |
608 | goto out_ilock; | |
609 | } | |
610 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); | |
611 | status = ocfs2_sync_dquot(dquot); | |
171bf93c MF |
612 | if (status < 0) |
613 | mlog_errno(status); | |
614 | /* We have to write local structure as well... */ | |
741e1289 | 615 | status = ocfs2_local_write_dquot(dquot); |
171bf93c MF |
616 | if (status < 0) |
617 | mlog_errno(status); | |
741e1289 | 618 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
171bf93c MF |
619 | ocfs2_commit_trans(osb, handle); |
620 | out_ilock: | |
621 | ocfs2_unlock_global_qf(oinfo, 1); | |
622 | out: | |
171bf93c MF |
623 | return status; |
624 | } | |
625 | ||
626 | static void qsync_work_fn(struct work_struct *work) | |
627 | { | |
628 | struct ocfs2_mem_dqinfo *oinfo = container_of(work, | |
629 | struct ocfs2_mem_dqinfo, | |
630 | dqi_sync_work.work); | |
631 | struct super_block *sb = oinfo->dqi_gqinode->i_sb; | |
632 | ||
633 | dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); | |
316873c9 TH |
634 | schedule_delayed_work(&oinfo->dqi_sync_work, |
635 | msecs_to_jiffies(oinfo->dqi_syncms)); | |
171bf93c MF |
636 | } |
637 | ||
9e33d69f JK |
638 | /* |
639 | * Wrappers for generic quota functions | |
640 | */ | |
641 | ||
642 | static int ocfs2_write_dquot(struct dquot *dquot) | |
643 | { | |
644 | handle_t *handle; | |
645 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
646 | int status = 0; | |
647 | ||
1db986a8 | 648 | trace_ocfs2_write_dquot(dquot->dq_id, dquot->dq_type); |
9e33d69f JK |
649 | |
650 | handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); | |
651 | if (IS_ERR(handle)) { | |
652 | status = PTR_ERR(handle); | |
653 | mlog_errno(status); | |
654 | goto out; | |
655 | } | |
741e1289 JK |
656 | mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
657 | status = ocfs2_local_write_dquot(dquot); | |
658 | mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); | |
9e33d69f JK |
659 | ocfs2_commit_trans(osb, handle); |
660 | out: | |
9e33d69f JK |
661 | return status; |
662 | } | |
663 | ||
b409d7a0 | 664 | static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
9e33d69f | 665 | { |
b409d7a0 | 666 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
0584974a JK |
667 | /* |
668 | * We modify tree, leaf block, global info, local chunk header, | |
669 | * global and local inode; OCFS2_QINFO_WRITE_CREDITS already | |
670 | * accounts for inode update | |
671 | */ | |
b409d7a0 JK |
672 | return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
673 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + | |
0584974a | 674 | OCFS2_QINFO_WRITE_CREDITS + |
0584974a | 675 | OCFS2_INODE_UPDATE_CREDITS; |
9e33d69f JK |
676 | } |
677 | ||
678 | static int ocfs2_release_dquot(struct dquot *dquot) | |
679 | { | |
680 | handle_t *handle; | |
681 | struct ocfs2_mem_dqinfo *oinfo = | |
682 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
683 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
684 | int status = 0; | |
685 | ||
1db986a8 | 686 | trace_ocfs2_release_dquot(dquot->dq_id, dquot->dq_type); |
9e33d69f | 687 | |
fb8dd8d7 JK |
688 | mutex_lock(&dquot->dq_lock); |
689 | /* Check whether we are not racing with some other dqget() */ | |
690 | if (atomic_read(&dquot->dq_count) > 1) | |
691 | goto out; | |
9e33d69f JK |
692 | status = ocfs2_lock_global_qf(oinfo, 1); |
693 | if (status < 0) | |
694 | goto out; | |
695 | handle = ocfs2_start_trans(osb, | |
696 | ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type)); | |
697 | if (IS_ERR(handle)) { | |
698 | status = PTR_ERR(handle); | |
699 | mlog_errno(status); | |
700 | goto out_ilock; | |
701 | } | |
fb8dd8d7 JK |
702 | |
703 | status = ocfs2_global_release_dquot(dquot); | |
704 | if (status < 0) { | |
705 | mlog_errno(status); | |
706 | goto out_trans; | |
707 | } | |
708 | status = ocfs2_local_release_dquot(handle, dquot); | |
709 | /* | |
710 | * If we fail here, we cannot do much as global structure is | |
711 | * already released. So just complain... | |
712 | */ | |
713 | if (status < 0) | |
714 | mlog_errno(status); | |
715 | clear_bit(DQ_ACTIVE_B, &dquot->dq_flags); | |
716 | out_trans: | |
9e33d69f JK |
717 | ocfs2_commit_trans(osb, handle); |
718 | out_ilock: | |
719 | ocfs2_unlock_global_qf(oinfo, 1); | |
720 | out: | |
fb8dd8d7 | 721 | mutex_unlock(&dquot->dq_lock); |
c1e8d35e TM |
722 | if (status) |
723 | mlog_errno(status); | |
9e33d69f JK |
724 | return status; |
725 | } | |
726 | ||
fb8dd8d7 JK |
727 | /* |
728 | * Read global dquot structure from disk or create it if it does | |
729 | * not exist. Also update use count of the global structure and | |
730 | * create structure in node-local quota file. | |
731 | */ | |
9e33d69f JK |
732 | static int ocfs2_acquire_dquot(struct dquot *dquot) |
733 | { | |
fb8dd8d7 JK |
734 | int status = 0, err; |
735 | int ex = 0; | |
736 | struct super_block *sb = dquot->dq_sb; | |
737 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
738 | int type = dquot->dq_type; | |
739 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
740 | struct inode *gqinode = info->dqi_gqinode; | |
741 | int need_alloc = ocfs2_global_qinit_alloc(sb, type); | |
742 | handle_t *handle; | |
9e33d69f | 743 | |
1db986a8 | 744 | trace_ocfs2_acquire_dquot(dquot->dq_id, type); |
fb8dd8d7 JK |
745 | mutex_lock(&dquot->dq_lock); |
746 | /* | |
747 | * We need an exclusive lock, because we're going to update use count | |
748 | * and instantiate possibly new dquot structure | |
749 | */ | |
750 | status = ocfs2_lock_global_qf(info, 1); | |
9e33d69f JK |
751 | if (status < 0) |
752 | goto out; | |
fb8dd8d7 JK |
753 | if (!test_bit(DQ_READ_B, &dquot->dq_flags)) { |
754 | status = ocfs2_qinfo_lock(info, 0); | |
755 | if (status < 0) | |
756 | goto out_dq; | |
757 | status = qtree_read_dquot(&info->dqi_gi, dquot); | |
758 | ocfs2_qinfo_unlock(info, 0); | |
759 | if (status < 0) | |
760 | goto out_dq; | |
761 | } | |
762 | set_bit(DQ_READ_B, &dquot->dq_flags); | |
763 | ||
764 | OCFS2_DQUOT(dquot)->dq_use_count++; | |
765 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
766 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
767 | if (!dquot->dq_off) { /* No real quota entry? */ | |
768 | ex = 1; | |
769 | /* | |
770 | * Add blocks to quota file before we start a transaction since | |
771 | * locking allocators ranks above a transaction start | |
772 | */ | |
773 | WARN_ON(journal_current_handle()); | |
5693486b | 774 | status = ocfs2_extend_no_holes(gqinode, NULL, |
fb8dd8d7 JK |
775 | gqinode->i_size + (need_alloc << sb->s_blocksize_bits), |
776 | gqinode->i_size); | |
777 | if (status < 0) | |
778 | goto out_dq; | |
779 | } | |
780 | ||
781 | handle = ocfs2_start_trans(osb, | |
782 | ocfs2_calc_global_qinit_credits(sb, type)); | |
783 | if (IS_ERR(handle)) { | |
784 | status = PTR_ERR(handle); | |
785 | goto out_dq; | |
786 | } | |
787 | status = ocfs2_qinfo_lock(info, ex); | |
788 | if (status < 0) | |
789 | goto out_trans; | |
790 | status = qtree_write_dquot(&info->dqi_gi, dquot); | |
791 | if (ex && info_dirty(sb_dqinfo(sb, type))) { | |
792 | err = __ocfs2_global_write_info(sb, type); | |
793 | if (!status) | |
794 | status = err; | |
795 | } | |
796 | ocfs2_qinfo_unlock(info, ex); | |
797 | out_trans: | |
798 | ocfs2_commit_trans(osb, handle); | |
799 | out_dq: | |
800 | ocfs2_unlock_global_qf(info, 1); | |
801 | if (status < 0) | |
802 | goto out; | |
803 | ||
804 | status = ocfs2_create_local_dquot(dquot); | |
805 | if (status < 0) | |
806 | goto out; | |
807 | set_bit(DQ_ACTIVE_B, &dquot->dq_flags); | |
9e33d69f | 808 | out: |
fb8dd8d7 | 809 | mutex_unlock(&dquot->dq_lock); |
c1e8d35e TM |
810 | if (status) |
811 | mlog_errno(status); | |
9e33d69f JK |
812 | return status; |
813 | } | |
814 | ||
815 | static int ocfs2_mark_dquot_dirty(struct dquot *dquot) | |
816 | { | |
817 | unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | | |
818 | (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | | |
819 | (1 << (DQ_LASTSET_B + QIF_INODES_B)) | | |
820 | (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | | |
821 | (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | | |
822 | (1 << (DQ_LASTSET_B + QIF_ITIME_B)); | |
823 | int sync = 0; | |
824 | int status; | |
825 | struct super_block *sb = dquot->dq_sb; | |
826 | int type = dquot->dq_type; | |
827 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
828 | handle_t *handle; | |
829 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
830 | ||
1db986a8 | 831 | trace_ocfs2_mark_dquot_dirty(dquot->dq_id, type); |
9e33d69f JK |
832 | |
833 | /* In case user set some limits, sync dquot immediately to global | |
834 | * quota file so that information propagates quicker */ | |
835 | spin_lock(&dq_data_lock); | |
836 | if (dquot->dq_flags & mask) | |
837 | sync = 1; | |
838 | spin_unlock(&dq_data_lock); | |
f8afead7 JK |
839 | /* This is a slight hack but we can't afford getting global quota |
840 | * lock if we already have a transaction started. */ | |
841 | if (!sync || journal_current_handle()) { | |
9e33d69f JK |
842 | status = ocfs2_write_dquot(dquot); |
843 | goto out; | |
844 | } | |
845 | status = ocfs2_lock_global_qf(oinfo, 1); | |
846 | if (status < 0) | |
847 | goto out; | |
848 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
849 | if (IS_ERR(handle)) { | |
850 | status = PTR_ERR(handle); | |
851 | mlog_errno(status); | |
852 | goto out_ilock; | |
853 | } | |
fb8dd8d7 | 854 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
9e33d69f JK |
855 | status = ocfs2_sync_dquot(dquot); |
856 | if (status < 0) { | |
857 | mlog_errno(status); | |
741e1289 | 858 | goto out_dlock; |
9e33d69f JK |
859 | } |
860 | /* Now write updated local dquot structure */ | |
741e1289 JK |
861 | status = ocfs2_local_write_dquot(dquot); |
862 | out_dlock: | |
863 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
9e33d69f JK |
864 | ocfs2_commit_trans(osb, handle); |
865 | out_ilock: | |
866 | ocfs2_unlock_global_qf(oinfo, 1); | |
867 | out: | |
c1e8d35e TM |
868 | if (status) |
869 | mlog_errno(status); | |
9e33d69f JK |
870 | return status; |
871 | } | |
872 | ||
873 | /* This should happen only after set_dqinfo(). */ | |
874 | static int ocfs2_write_info(struct super_block *sb, int type) | |
875 | { | |
876 | handle_t *handle; | |
877 | int status = 0; | |
878 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
879 | ||
9e33d69f JK |
880 | status = ocfs2_lock_global_qf(oinfo, 1); |
881 | if (status < 0) | |
882 | goto out; | |
883 | handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); | |
884 | if (IS_ERR(handle)) { | |
885 | status = PTR_ERR(handle); | |
886 | mlog_errno(status); | |
887 | goto out_ilock; | |
888 | } | |
889 | status = dquot_commit_info(sb, type); | |
890 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
891 | out_ilock: | |
892 | ocfs2_unlock_global_qf(oinfo, 1); | |
893 | out: | |
c1e8d35e TM |
894 | if (status) |
895 | mlog_errno(status); | |
9e33d69f JK |
896 | return status; |
897 | } | |
898 | ||
9e33d69f JK |
899 | static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
900 | { | |
901 | struct ocfs2_dquot *dquot = | |
902 | kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS); | |
903 | ||
904 | if (!dquot) | |
905 | return NULL; | |
906 | return &dquot->dq_dquot; | |
907 | } | |
908 | ||
909 | static void ocfs2_destroy_dquot(struct dquot *dquot) | |
910 | { | |
911 | kmem_cache_free(ocfs2_dquot_cachep, dquot); | |
912 | } | |
913 | ||
61e225dc | 914 | const struct dquot_operations ocfs2_quota_operations = { |
741e1289 | 915 | /* We never make dquot dirty so .write_dquot is never called */ |
9e33d69f JK |
916 | .acquire_dquot = ocfs2_acquire_dquot, |
917 | .release_dquot = ocfs2_release_dquot, | |
918 | .mark_dirty = ocfs2_mark_dquot_dirty, | |
919 | .write_info = ocfs2_write_info, | |
920 | .alloc_dquot = ocfs2_alloc_dquot, | |
921 | .destroy_dquot = ocfs2_destroy_dquot, | |
922 | }; |