1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Implementation of operations over global quota file |
4 | */ |
5 | #include <linux/spinlock.h> |
6 | #include <linux/fs.h> |
7 | #include <linux/slab.h> |
8 | #include <linux/quota.h> |
9 | #include <linux/quotaops.h> |
10 | #include <linux/dqblk_qtree.h> |
11 | #include <linux/jiffies.h> |
12 | #include <linux/writeback.h> |
13 | #include <linux/workqueue.h> |
14 | #include <linux/llist.h> |
15 | #include <linux/iversion.h> |
16 | |
17 | #include <cluster/masklog.h> |
18 | |
19 | #include "ocfs2_fs.h" |
20 | #include "ocfs2.h" |
21 | #include "alloc.h" |
22 | #include "blockcheck.h" |
23 | #include "inode.h" |
24 | #include "journal.h" |
25 | #include "file.h" |
26 | #include "sysfile.h" |
27 | #include "dlmglue.h" |
28 | #include "uptodate.h" |
29 | #include "super.h" |
30 | #include "buffer_head_io.h" |
31 | #include "quota.h" |
32 | #include "ocfs2_trace.h" |
33 | |
34 | /* |
35 | * Locking of quotas with OCFS2 is rather complex. Here are rules that |
36 | * should be obeyed by all the functions: |
37 | * - any write of quota structure (either to local or global file) is protected |
38 | * by dqio_sem or dquot->dq_lock. |
39 | * - any modification of global quota file holds inode cluster lock, i_rwsem, |
40 | * and ip_alloc_sem of the global quota file (achieved by |
41 | * ocfs2_lock_global_qf). It also has to hold qinfo_lock. |
42 | * - an allocation of new blocks for local quota file is protected by |
43 | * its ip_alloc_sem |
44 | * |
45 | * A rough sketch of locking dependencies (lf = local file, gf = global file): |
46 | * Normal filesystem operation: |
47 | * start_trans -> dqio_sem -> write to lf |
48 | * Syncing of local and global file: |
49 | * ocfs2_lock_global_qf -> start_trans -> dqio_sem -> qinfo_lock -> |
50 | * write to gf |
51 | * -> write to lf |
52 | * Acquire dquot for the first time: |
53 | * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf |
54 | * -> alloc space for gf |
55 | * -> start_trans -> qinfo_lock -> write to gf |
56 | * -> ip_alloc_sem of lf -> alloc space for lf |
57 | * -> write to lf |
58 | * Release last reference to dquot: |
59 | * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf |
60 | * -> write to lf |
61 | * Note that all the above operations also hold the inode cluster lock of lf. |
62 | * Recovery: |
63 | * inode cluster lock of recovered lf |
64 | * -> read bitmaps -> ip_alloc_sem of lf |
65 | * -> ocfs2_lock_global_qf -> start_trans -> dqio_sem -> qinfo_lock -> |
66 | * write to gf |
67 | */ |
68 | |
69 | static void qsync_work_fn(struct work_struct *work); |
70 | |
71 | static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp) |
72 | { |
73 | struct ocfs2_global_disk_dqblk *d = dp; |
74 | struct mem_dqblk *m = &dquot->dq_dqb; |
75 | |
76 | /* Update from disk only entries not set by the admin */ |
77 | if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) { |
78 | m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); |
79 | m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); |
80 | } |
81 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) |
82 | m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); |
83 | if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) { |
84 | m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit); |
85 | m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit); |
86 | } |
87 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
88 | m->dqb_curspace = le64_to_cpu(d->dqb_curspace); |
89 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags)) |
90 | m->dqb_btime = le64_to_cpu(d->dqb_btime); |
91 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags)) |
92 | m->dqb_itime = le64_to_cpu(d->dqb_itime); |
93 | OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count); |
94 | } |
95 | |
96 | static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot) |
97 | { |
98 | struct ocfs2_global_disk_dqblk *d = dp; |
99 | struct mem_dqblk *m = &dquot->dq_dqb; |
100 | |
101 | d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id)); |
102 | d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count); |
103 | d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); |
104 | d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); |
105 | d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); |
106 | d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit); |
107 | d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit); |
108 | d->dqb_curspace = cpu_to_le64(m->dqb_curspace); |
109 | d->dqb_btime = cpu_to_le64(m->dqb_btime); |
110 | d->dqb_itime = cpu_to_le64(m->dqb_itime); |
111 | d->dqb_pad1 = d->dqb_pad2 = 0; |
112 | } |
113 | |
114 | static int ocfs2_global_is_id(void *dp, struct dquot *dquot) |
115 | { |
116 | struct ocfs2_global_disk_dqblk *d = dp; |
117 | struct ocfs2_mem_dqinfo *oinfo = |
118 | sb_dqinfo(sb: dquot->dq_sb, type: dquot->dq_id.type)->dqi_priv; |
119 | |
120 | if (qtree_entry_unused(info: &oinfo->dqi_gi, disk: dp)) |
121 | return 0; |
122 | |
123 | return qid_eq(left: make_kqid(from: &init_user_ns, type: dquot->dq_id.type, |
124 | le32_to_cpu(d->dqb_id)), |
125 | right: dquot->dq_id); |
126 | } |
127 | |
128 | const struct qtree_fmt_operations ocfs2_global_ops = { |
129 | .mem2disk_dqblk = ocfs2_global_mem2diskdqb, |
130 | .disk2mem_dqblk = ocfs2_global_disk2memdqb, |
131 | .is_id = ocfs2_global_is_id, |
132 | }; |
133 | |
134 | int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh) |
135 | { |
136 | struct ocfs2_disk_dqtrailer *dqt = |
137 | ocfs2_block_dqtrailer(blocksize: sb->s_blocksize, buf: bh->b_data); |
138 | |
139 | trace_ocfs2_validate_quota_block(num: (unsigned long long)bh->b_blocknr); |
140 | |
141 | BUG_ON(!buffer_uptodate(bh)); |
142 | |
143 | /* |
144 | * If the ecc fails, we return the error but otherwise |
145 | * leave the filesystem running. We know any error is |
146 | * local to this block. |
147 | */ |
148 | return ocfs2_validate_meta_ecc(sb, data: bh->b_data, bc: &dqt->dq_check); |
149 | } |
150 | |
151 | int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
152 | struct buffer_head **bhp) |
153 | { |
154 | int rc; |
155 | |
156 | *bhp = NULL; |
157 | rc = ocfs2_read_blocks(ci: INODE_CACHE(inode), block: p_block, nr: 1, bhs: bhp, flags: 0, |
158 | validate: ocfs2_validate_quota_block); |
159 | if (rc) |
160 | mlog_errno(rc); |
161 | return rc; |
162 | } |
163 | |
164 | /* Read data from global quotafile - avoid pagecache and such because we cannot |
165 | * afford acquiring the locks... We use quota cluster lock to serialize |
166 | * operations. Caller is responsible for acquiring it. */ |
167 | ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, |
168 | size_t len, loff_t off) |
169 | { |
170 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
171 | struct inode *gqinode = oinfo->dqi_gqinode; |
172 | loff_t i_size = i_size_read(inode: gqinode); |
173 | int offset = off & (sb->s_blocksize - 1); |
174 | sector_t blk = off >> sb->s_blocksize_bits; |
175 | int err = 0; |
176 | struct buffer_head *bh; |
177 | size_t toread, tocopy; |
178 | u64 pblock = 0, pcount = 0; |
179 | |
180 | if (off > i_size) |
181 | return 0; |
182 | if (off + len > i_size) |
183 | len = i_size - off; |
184 | toread = len; |
185 | while (toread > 0) { |
186 | tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
187 | if (!pcount) { |
188 | err = ocfs2_extent_map_get_blocks(inode: gqinode, v_blkno: blk, p_blkno: &pblock, |
189 | ret_count: &pcount, NULL); |
190 | if (err) { |
191 | mlog_errno(err); |
192 | return err; |
193 | } |
194 | } else { |
195 | pcount--; |
196 | pblock++; |
197 | } |
198 | bh = NULL; |
199 | err = ocfs2_read_quota_phys_block(inode: gqinode, p_block: pblock, bhp: &bh); |
200 | if (err) { |
201 | mlog_errno(err); |
202 | return err; |
203 | } |
204 | memcpy(data, bh->b_data + offset, tocopy); |
205 | brelse(bh); |
206 | offset = 0; |
207 | toread -= tocopy; |
208 | data += tocopy; |
209 | blk++; |
210 | } |
211 | return len; |
212 | } |
213 | |
214 | /* Write to quotafile (we know the transaction is already started and has |
215 | * enough credits) */ |
216 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, |
217 | const char *data, size_t len, loff_t off) |
218 | { |
219 | struct mem_dqinfo *info = sb_dqinfo(sb, type); |
220 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
221 | struct inode *gqinode = oinfo->dqi_gqinode; |
222 | int offset = off & (sb->s_blocksize - 1); |
223 | sector_t blk = off >> sb->s_blocksize_bits; |
224 | int err = 0, new = 0, ja_type; |
225 | struct buffer_head *bh = NULL; |
226 | handle_t *handle = journal_current_handle(); |
227 | u64 pblock, pcount; |
228 | |
229 | if (!handle) { |
230 | mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled " |
231 | "because transaction was not started.\n" , |
232 | (unsigned long long)off, (unsigned long long)len); |
233 | return -EIO; |
234 | } |
235 | if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) { |
236 | WARN_ON(1); |
237 | len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset; |
238 | } |
239 | |
240 | if (i_size_read(inode: gqinode) < off + len) { |
241 | loff_t rounded_end = |
242 | ocfs2_align_bytes_to_blocks(sb, bytes: off + len); |
243 | |
244 | /* Space is already allocated in ocfs2_acquire_dquot() */ |
245 | err = ocfs2_simple_size_update(inode: gqinode, |
246 | di_bh: oinfo->dqi_gqi_bh, |
247 | new_i_size: rounded_end); |
248 | if (err < 0) |
249 | goto out; |
250 | new = 1; |
251 | } |
252 | err = ocfs2_extent_map_get_blocks(inode: gqinode, v_blkno: blk, p_blkno: &pblock, ret_count: &pcount, NULL); |
253 | if (err) { |
254 | mlog_errno(err); |
255 | goto out; |
256 | } |
257 | /* Not rewriting whole block? */ |
258 | if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) && |
259 | !new) { |
260 | err = ocfs2_read_quota_phys_block(inode: gqinode, p_block: pblock, bhp: &bh); |
261 | ja_type = OCFS2_JOURNAL_ACCESS_WRITE; |
262 | } else { |
263 | bh = sb_getblk(sb, block: pblock); |
264 | if (!bh) |
265 | err = -ENOMEM; |
266 | ja_type = OCFS2_JOURNAL_ACCESS_CREATE; |
267 | } |
268 | if (err) { |
269 | mlog_errno(err); |
270 | goto out; |
271 | } |
272 | lock_buffer(bh); |
273 | if (new) |
274 | memset(bh->b_data, 0, sb->s_blocksize); |
275 | memcpy(bh->b_data + offset, data, len); |
276 | flush_dcache_page(page: bh->b_page); |
277 | set_buffer_uptodate(bh); |
278 | unlock_buffer(bh); |
279 | ocfs2_set_buffer_uptodate(ci: INODE_CACHE(inode: gqinode), bh); |
280 | err = ocfs2_journal_access_dq(handle, ci: INODE_CACHE(inode: gqinode), bh, |
281 | type: ja_type); |
282 | if (err < 0) { |
283 | brelse(bh); |
284 | goto out; |
285 | } |
286 | ocfs2_journal_dirty(handle, bh); |
287 | brelse(bh); |
288 | out: |
289 | if (err) { |
290 | mlog_errno(err); |
291 | return err; |
292 | } |
293 | inode_inc_iversion(inode: gqinode); |
294 | ocfs2_mark_inode_dirty(handle, inode: gqinode, bh: oinfo->dqi_gqi_bh); |
295 | return len; |
296 | } |
297 | |
298 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) |
299 | { |
300 | int status; |
301 | struct buffer_head *bh = NULL; |
302 | |
303 | status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex); |
304 | if (status < 0) |
305 | return status; |
306 | spin_lock(lock: &dq_data_lock); |
307 | if (!oinfo->dqi_gqi_count++) |
308 | oinfo->dqi_gqi_bh = bh; |
309 | else |
310 | WARN_ON(bh != oinfo->dqi_gqi_bh); |
311 | spin_unlock(lock: &dq_data_lock); |
312 | if (ex) { |
313 | inode_lock(inode: oinfo->dqi_gqinode); |
314 | down_write(sem: &OCFS2_I(inode: oinfo->dqi_gqinode)->ip_alloc_sem); |
315 | } else { |
316 | down_read(sem: &OCFS2_I(inode: oinfo->dqi_gqinode)->ip_alloc_sem); |
317 | } |
318 | return 0; |
319 | } |
320 | |
321 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) |
322 | { |
323 | if (ex) { |
324 | up_write(sem: &OCFS2_I(inode: oinfo->dqi_gqinode)->ip_alloc_sem); |
325 | inode_unlock(inode: oinfo->dqi_gqinode); |
326 | } else { |
327 | up_read(sem: &OCFS2_I(inode: oinfo->dqi_gqinode)->ip_alloc_sem); |
328 | } |
329 | ocfs2_inode_unlock(inode: oinfo->dqi_gqinode, ex); |
330 | brelse(bh: oinfo->dqi_gqi_bh); |
331 | spin_lock(lock: &dq_data_lock); |
332 | if (!--oinfo->dqi_gqi_count) |
333 | oinfo->dqi_gqi_bh = NULL; |
334 | spin_unlock(lock: &dq_data_lock); |
335 | } |
336 | |
337 | /* Read information header from global quota file */ |
338 | int ocfs2_global_read_info(struct super_block *sb, int type) |
339 | { |
340 | unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, |
341 | GROUP_QUOTA_SYSTEM_INODE }; |
342 | struct ocfs2_global_disk_dqinfo dinfo; |
343 | struct mem_dqinfo *info = sb_dqinfo(sb, type); |
344 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
345 | u64 pcount; |
346 | int status; |
347 | |
348 | oinfo->dqi_gi.dqi_sb = sb; |
349 | oinfo->dqi_gi.dqi_type = type; |
350 | ocfs2_qinfo_lock_res_init(lockres: &oinfo->dqi_gqlock, info: oinfo); |
351 | oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); |
352 | oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; |
353 | oinfo->dqi_gqi_bh = NULL; |
354 | oinfo->dqi_gqi_count = 0; |
355 | |
356 | /* Read global header */ |
357 | oinfo->dqi_gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), type: ino[type], |
358 | OCFS2_INVALID_SLOT); |
359 | if (!oinfo->dqi_gqinode) { |
360 | mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n" , |
361 | type); |
362 | status = -EINVAL; |
363 | goto out_err; |
364 | } |
365 | |
366 | status = ocfs2_lock_global_qf(oinfo, ex: 0); |
367 | if (status < 0) { |
368 | mlog_errno(status); |
369 | goto out_err; |
370 | } |
371 | |
372 | status = ocfs2_extent_map_get_blocks(inode: oinfo->dqi_gqinode, v_blkno: 0, p_blkno: &oinfo->dqi_giblk, |
373 | ret_count: &pcount, NULL); |
374 | if (status < 0) |
375 | goto out_unlock; |
376 | |
377 | status = ocfs2_qinfo_lock(oinfo, ex: 0); |
378 | if (status < 0) |
379 | goto out_unlock; |
380 | status = sb->s_op->quota_read(sb, type, (char *)&dinfo, |
381 | sizeof(struct ocfs2_global_disk_dqinfo), |
382 | OCFS2_GLOBAL_INFO_OFF); |
383 | ocfs2_qinfo_unlock(oinfo, ex: 0); |
384 | ocfs2_unlock_global_qf(oinfo, ex: 0); |
385 | if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { |
386 | mlog(ML_ERROR, "Cannot read global quota info (%d).\n" , |
387 | status); |
388 | if (status >= 0) |
389 | status = -EIO; |
390 | mlog_errno(status); |
391 | goto out_err; |
392 | } |
393 | info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); |
394 | info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); |
395 | oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); |
396 | oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); |
397 | oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); |
398 | oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); |
399 | oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; |
400 | oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - |
401 | OCFS2_QBLK_RESERVED_SPACE; |
402 | oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(info: &oinfo->dqi_gi); |
403 | INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
404 | schedule_delayed_work(dwork: &oinfo->dqi_sync_work, |
405 | delay: msecs_to_jiffies(m: oinfo->dqi_syncms)); |
406 | |
407 | out_err: |
408 | return status; |
409 | out_unlock: |
410 | ocfs2_unlock_global_qf(oinfo, ex: 0); |
411 | mlog_errno(status); |
412 | goto out_err; |
413 | } |
414 | |
415 | /* Write information to global quota file. Expects exclusive 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(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(lock: &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 quota_info *dqopt = sb_dqopt(sb); |
449 | struct ocfs2_mem_dqinfo *info = dqopt->info[type].dqi_priv; |
450 | |
451 | down_write(sem: &dqopt->dqio_sem); |
452 | err = ocfs2_qinfo_lock(oinfo: info, ex: 1); |
453 | if (err < 0) |
454 | goto out_sem; |
455 | err = __ocfs2_global_write_info(sb, type); |
456 | ocfs2_qinfo_unlock(oinfo: info, ex: 1); |
457 | out_sem: |
458 | up_write(sem: &dqopt->dqio_sem); |
459 | return err; |
460 | } |
461 | |
462 | static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
463 | { |
464 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
465 | |
466 | /* |
467 | * We may need to allocate tree blocks and a leaf block but not the |
468 | * root block |
469 | */ |
470 | return oinfo->dqi_gi.dqi_qtree_depth; |
471 | } |
472 | |
473 | static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) |
474 | { |
475 | /* We modify all the allocated blocks, tree root, info block and |
476 | * the inode */ |
477 | return (ocfs2_global_qinit_alloc(sb, type) + 2) * |
478 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1; |
479 | } |
480 | |
481 | /* Sync local information about quota modifications with global quota file. |
482 | * Caller must have started the transaction and obtained exclusive lock for |
483 | * global quota file inode */ |
484 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) |
485 | { |
486 | int err, err2; |
487 | struct super_block *sb = dquot->dq_sb; |
488 | int type = dquot->dq_id.type; |
489 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
490 | struct ocfs2_global_disk_dqblk dqblk; |
491 | s64 spacechange, inodechange; |
492 | time64_t olditime, oldbtime; |
493 | |
494 | err = sb->s_op->quota_read(sb, type, (char *)&dqblk, |
495 | sizeof(struct ocfs2_global_disk_dqblk), |
496 | dquot->dq_off); |
497 | if (err != sizeof(struct ocfs2_global_disk_dqblk)) { |
498 | if (err >= 0) { |
499 | mlog(ML_ERROR, "Short read from global quota file " |
500 | "(%u read)\n" , err); |
501 | err = -EIO; |
502 | } |
503 | goto out; |
504 | } |
505 | |
506 | /* Update space and inode usage. Get also other information from |
507 | * global quota file so that we don't overwrite any changes there. |
508 | * We are */ |
509 | spin_lock(lock: &dquot->dq_dqb_lock); |
510 | spacechange = dquot->dq_dqb.dqb_curspace - |
511 | OCFS2_DQUOT(dquot)->dq_origspace; |
512 | inodechange = dquot->dq_dqb.dqb_curinodes - |
513 | OCFS2_DQUOT(dquot)->dq_originodes; |
514 | olditime = dquot->dq_dqb.dqb_itime; |
515 | oldbtime = dquot->dq_dqb.dqb_btime; |
516 | ocfs2_global_disk2memdqb(dquot, dp: &dqblk); |
517 | trace_ocfs2_sync_dquot(dq_id: from_kqid(to: &init_user_ns, qid: dquot->dq_id), |
518 | dqb_curspace: dquot->dq_dqb.dqb_curspace, |
519 | spacechange: (long long)spacechange, |
520 | curinodes: dquot->dq_dqb.dqb_curinodes, |
521 | inodechange: (long long)inodechange); |
522 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
523 | dquot->dq_dqb.dqb_curspace += spacechange; |
524 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) |
525 | dquot->dq_dqb.dqb_curinodes += inodechange; |
526 | /* Set properly space grace time... */ |
527 | if (dquot->dq_dqb.dqb_bsoftlimit && |
528 | dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { |
529 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && |
530 | oldbtime > 0) { |
531 | if (dquot->dq_dqb.dqb_btime > 0) |
532 | dquot->dq_dqb.dqb_btime = |
533 | min(dquot->dq_dqb.dqb_btime, oldbtime); |
534 | else |
535 | dquot->dq_dqb.dqb_btime = oldbtime; |
536 | } |
537 | } else { |
538 | dquot->dq_dqb.dqb_btime = 0; |
539 | clear_bit(DQ_BLKS_B, addr: &dquot->dq_flags); |
540 | } |
541 | /* Set properly inode grace time... */ |
542 | if (dquot->dq_dqb.dqb_isoftlimit && |
543 | dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { |
544 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && |
545 | olditime > 0) { |
546 | if (dquot->dq_dqb.dqb_itime > 0) |
547 | dquot->dq_dqb.dqb_itime = |
548 | min(dquot->dq_dqb.dqb_itime, olditime); |
549 | else |
550 | dquot->dq_dqb.dqb_itime = olditime; |
551 | } |
552 | } else { |
553 | dquot->dq_dqb.dqb_itime = 0; |
554 | clear_bit(DQ_INODES_B, addr: &dquot->dq_flags); |
555 | } |
556 | /* All information is properly updated, clear the flags */ |
557 | __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); |
558 | __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); |
559 | __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); |
560 | __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); |
561 | __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); |
562 | __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); |
563 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; |
564 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; |
565 | spin_unlock(lock: &dquot->dq_dqb_lock); |
566 | err = ocfs2_qinfo_lock(oinfo: info, ex: freeing); |
567 | if (err < 0) { |
568 | mlog(ML_ERROR, "Failed to lock quota info, losing quota write" |
569 | " (type=%d, id=%u)\n" , dquot->dq_id.type, |
570 | (unsigned)from_kqid(&init_user_ns, dquot->dq_id)); |
571 | goto out; |
572 | } |
573 | if (freeing) |
574 | OCFS2_DQUOT(dquot)->dq_use_count--; |
575 | err = qtree_write_dquot(info: &info->dqi_gi, dquot); |
576 | if (err < 0) |
577 | goto out_qlock; |
578 | if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { |
579 | err = qtree_release_dquot(info: &info->dqi_gi, dquot); |
580 | if (info_dirty(info: sb_dqinfo(sb, type))) { |
581 | err2 = __ocfs2_global_write_info(sb, type); |
582 | if (!err) |
583 | err = err2; |
584 | } |
585 | } |
586 | out_qlock: |
587 | ocfs2_qinfo_unlock(oinfo: info, ex: freeing); |
588 | out: |
589 | if (err < 0) |
590 | mlog_errno(err); |
591 | return err; |
592 | } |
593 | |
594 | /* |
595 | * Functions for periodic syncing of dquots with global file |
596 | */ |
597 | static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) |
598 | { |
599 | handle_t *handle; |
600 | struct super_block *sb = dquot->dq_sb; |
601 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
602 | struct ocfs2_super *osb = OCFS2_SB(sb); |
603 | int status = 0; |
604 | |
605 | trace_ocfs2_sync_dquot_helper(dq_id: from_kqid(to: &init_user_ns, qid: dquot->dq_id), |
606 | dq_type: dquot->dq_id.type, |
607 | type, s_id: sb->s_id); |
608 | if (type != dquot->dq_id.type) |
609 | goto out; |
610 | status = ocfs2_lock_global_qf(oinfo, ex: 1); |
611 | if (status < 0) |
612 | goto out; |
613 | |
614 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); |
615 | if (IS_ERR(ptr: handle)) { |
616 | status = PTR_ERR(ptr: handle); |
617 | mlog_errno(status); |
618 | goto out_ilock; |
619 | } |
620 | down_write(sem: &sb_dqopt(sb)->dqio_sem); |
621 | status = ocfs2_sync_dquot(dquot); |
622 | if (status < 0) |
623 | mlog_errno(status); |
624 | /* We have to write local structure as well... */ |
625 | status = ocfs2_local_write_dquot(dquot); |
626 | if (status < 0) |
627 | mlog_errno(status); |
628 | up_write(sem: &sb_dqopt(sb)->dqio_sem); |
629 | ocfs2_commit_trans(osb, handle); |
630 | out_ilock: |
631 | ocfs2_unlock_global_qf(oinfo, ex: 1); |
632 | out: |
633 | return status; |
634 | } |
635 | |
636 | static void qsync_work_fn(struct work_struct *work) |
637 | { |
638 | struct ocfs2_mem_dqinfo *oinfo = container_of(work, |
639 | struct ocfs2_mem_dqinfo, |
640 | dqi_sync_work.work); |
641 | struct super_block *sb = oinfo->dqi_gqinode->i_sb; |
642 | |
643 | /* |
644 | * We have to be careful here not to deadlock on s_umount as umount |
645 | * disabling quotas may be in progress and it waits for this work to |
646 | * complete. If trylock fails, we'll do the sync next time... |
647 | */ |
648 | if (down_read_trylock(sem: &sb->s_umount)) { |
649 | dquot_scan_active(sb, fn: ocfs2_sync_dquot_helper, priv: oinfo->dqi_type); |
650 | up_read(sem: &sb->s_umount); |
651 | } |
652 | schedule_delayed_work(dwork: &oinfo->dqi_sync_work, |
653 | delay: msecs_to_jiffies(m: oinfo->dqi_syncms)); |
654 | } |
655 | |
656 | /* |
657 | * Wrappers for generic quota functions |
658 | */ |
659 | |
660 | static int ocfs2_write_dquot(struct dquot *dquot) |
661 | { |
662 | handle_t *handle; |
663 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); |
664 | int status = 0; |
665 | |
666 | trace_ocfs2_write_dquot(val1: from_kqid(to: &init_user_ns, qid: dquot->dq_id), |
667 | val2: dquot->dq_id.type); |
668 | |
669 | handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); |
670 | if (IS_ERR(ptr: handle)) { |
671 | status = PTR_ERR(ptr: handle); |
672 | mlog_errno(status); |
673 | goto out; |
674 | } |
675 | down_write(sem: &sb_dqopt(sb: dquot->dq_sb)->dqio_sem); |
676 | status = ocfs2_local_write_dquot(dquot); |
677 | up_write(sem: &sb_dqopt(sb: dquot->dq_sb)->dqio_sem); |
678 | ocfs2_commit_trans(osb, handle); |
679 | out: |
680 | return status; |
681 | } |
682 | |
683 | static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
684 | { |
685 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
686 | /* |
687 | * We modify tree, leaf block, global info, local chunk header, |
688 | * global and local inode; OCFS2_QINFO_WRITE_CREDITS already |
689 | * accounts for inode update |
690 | */ |
691 | return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
692 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + |
693 | OCFS2_QINFO_WRITE_CREDITS + |
694 | OCFS2_INODE_UPDATE_CREDITS; |
695 | } |
696 | |
697 | void ocfs2_drop_dquot_refs(struct work_struct *work) |
698 | { |
699 | struct ocfs2_super *osb = container_of(work, struct ocfs2_super, |
700 | dquot_drop_work); |
701 | struct llist_node *list; |
702 | struct ocfs2_dquot *odquot, *next_odquot; |
703 | |
704 | list = llist_del_all(head: &osb->dquot_drop_list); |
705 | llist_for_each_entry_safe(odquot, next_odquot, list, list) { |
706 | /* Drop the reference we acquired in ocfs2_dquot_release() */ |
707 | dqput(dquot: &odquot->dq_dquot); |
708 | } |
709 | } |
710 | |
711 | /* |
712 | * Called when the last reference to dquot is dropped. If we are called from |
713 | * downconvert thread, we cannot do all the handling here because grabbing |
714 | * quota lock could deadlock (the node holding the quota lock could need some |
715 | * other cluster lock to proceed but with blocked downconvert thread we cannot |
716 | * release any lock). |
717 | */ |
718 | static int ocfs2_release_dquot(struct dquot *dquot) |
719 | { |
720 | handle_t *handle; |
721 | struct ocfs2_mem_dqinfo *oinfo = |
722 | sb_dqinfo(sb: dquot->dq_sb, type: dquot->dq_id.type)->dqi_priv; |
723 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); |
724 | int status = 0; |
725 | |
726 | trace_ocfs2_release_dquot(val1: from_kqid(to: &init_user_ns, qid: dquot->dq_id), |
727 | val2: dquot->dq_id.type); |
728 | |
729 | mutex_lock(&dquot->dq_lock); |
730 | /* Check whether we are not racing with some other dqget() */ |
731 | if (dquot_is_busy(dquot)) |
732 | goto out; |
733 | /* Running from downconvert thread? Postpone quota processing to wq */ |
734 | if (current == osb->dc_task) { |
735 | /* |
736 | * Grab our own reference to dquot and queue it for delayed |
737 | * dropping. Quota code rechecks after calling |
738 | * ->release_dquot() and won't free dquot structure. |
739 | */ |
740 | dqgrab(dquot); |
741 | /* First entry on list -> queue work */ |
742 | if (llist_add(new: &OCFS2_DQUOT(dquot)->list, head: &osb->dquot_drop_list)) |
743 | queue_work(wq: osb->ocfs2_wq, work: &osb->dquot_drop_work); |
744 | goto out; |
745 | } |
746 | status = ocfs2_lock_global_qf(oinfo, ex: 1); |
747 | if (status < 0) |
748 | goto out; |
749 | handle = ocfs2_start_trans(osb, |
750 | max_buffs: ocfs2_calc_qdel_credits(sb: dquot->dq_sb, type: dquot->dq_id.type)); |
751 | if (IS_ERR(ptr: handle)) { |
752 | status = PTR_ERR(ptr: handle); |
753 | mlog_errno(status); |
754 | goto out_ilock; |
755 | } |
756 | |
757 | status = ocfs2_global_release_dquot(dquot); |
758 | if (status < 0) { |
759 | mlog_errno(status); |
760 | goto out_trans; |
761 | } |
762 | status = ocfs2_local_release_dquot(handle, dquot); |
763 | /* |
764 | * If we fail here, we cannot do much as global structure is |
765 | * already released. So just complain... |
766 | */ |
767 | if (status < 0) |
768 | mlog_errno(status); |
769 | /* |
770 | * Clear dq_off so that we search for the structure in quota file next |
771 | * time we acquire it. The structure might be deleted and reallocated |
772 | * elsewhere by another node while our dquot structure is on freelist. |
773 | */ |
774 | dquot->dq_off = 0; |
775 | clear_bit(DQ_ACTIVE_B, addr: &dquot->dq_flags); |
776 | out_trans: |
777 | ocfs2_commit_trans(osb, handle); |
778 | out_ilock: |
779 | ocfs2_unlock_global_qf(oinfo, ex: 1); |
780 | out: |
781 | mutex_unlock(lock: &dquot->dq_lock); |
782 | if (status) |
783 | mlog_errno(status); |
784 | return status; |
785 | } |
786 | |
787 | /* |
788 | * Read global dquot structure from disk or create it if it does |
789 | * not exist. Also update use count of the global structure and |
790 | * create structure in node-local quota file. |
791 | */ |
792 | static int ocfs2_acquire_dquot(struct dquot *dquot) |
793 | { |
794 | int status = 0, err; |
795 | int ex = 0; |
796 | struct super_block *sb = dquot->dq_sb; |
797 | struct ocfs2_super *osb = OCFS2_SB(sb); |
798 | int type = dquot->dq_id.type; |
799 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
800 | struct inode *gqinode = info->dqi_gqinode; |
801 | int need_alloc = ocfs2_global_qinit_alloc(sb, type); |
802 | handle_t *handle; |
803 | |
804 | trace_ocfs2_acquire_dquot(val1: from_kqid(to: &init_user_ns, qid: dquot->dq_id), |
805 | val2: type); |
806 | mutex_lock(&dquot->dq_lock); |
807 | /* |
808 | * We need an exclusive lock, because we're going to update use count |
809 | * and instantiate possibly new dquot structure |
810 | */ |
811 | status = ocfs2_lock_global_qf(oinfo: info, ex: 1); |
812 | if (status < 0) |
813 | goto out; |
814 | status = ocfs2_qinfo_lock(oinfo: info, ex: 0); |
815 | if (status < 0) |
816 | goto out_dq; |
817 | /* |
818 | * We always want to read dquot structure from disk because we don't |
819 | * know what happened with it while it was on freelist. |
820 | */ |
821 | status = qtree_read_dquot(info: &info->dqi_gi, dquot); |
822 | ocfs2_qinfo_unlock(oinfo: info, ex: 0); |
823 | if (status < 0) |
824 | goto out_dq; |
825 | |
826 | OCFS2_DQUOT(dquot)->dq_use_count++; |
827 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; |
828 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; |
829 | if (!dquot->dq_off) { /* No real quota entry? */ |
830 | ex = 1; |
831 | /* |
832 | * Add blocks to quota file before we start a transaction since |
833 | * locking allocators ranks above a transaction start |
834 | */ |
835 | WARN_ON(journal_current_handle()); |
836 | status = ocfs2_extend_no_holes(inode: gqinode, NULL, |
837 | new_i_size: i_size_read(inode: gqinode) + (need_alloc << sb->s_blocksize_bits), |
838 | zero_to: i_size_read(inode: gqinode)); |
839 | if (status < 0) |
840 | goto out_dq; |
841 | } |
842 | |
843 | handle = ocfs2_start_trans(osb, |
844 | max_buffs: ocfs2_calc_global_qinit_credits(sb, type)); |
845 | if (IS_ERR(ptr: handle)) { |
846 | status = PTR_ERR(ptr: handle); |
847 | goto out_dq; |
848 | } |
849 | status = ocfs2_qinfo_lock(oinfo: info, ex); |
850 | if (status < 0) |
851 | goto out_trans; |
852 | status = qtree_write_dquot(info: &info->dqi_gi, dquot); |
853 | if (ex && info_dirty(info: sb_dqinfo(sb, type))) { |
854 | err = __ocfs2_global_write_info(sb, type); |
855 | if (!status) |
856 | status = err; |
857 | } |
858 | ocfs2_qinfo_unlock(oinfo: info, ex); |
859 | out_trans: |
860 | ocfs2_commit_trans(osb, handle); |
861 | out_dq: |
862 | ocfs2_unlock_global_qf(oinfo: info, ex: 1); |
863 | if (status < 0) |
864 | goto out; |
865 | |
866 | status = ocfs2_create_local_dquot(dquot); |
867 | if (status < 0) |
868 | goto out; |
869 | set_bit(DQ_ACTIVE_B, addr: &dquot->dq_flags); |
870 | out: |
871 | mutex_unlock(lock: &dquot->dq_lock); |
872 | if (status) |
873 | mlog_errno(status); |
874 | return status; |
875 | } |
876 | |
877 | static int ocfs2_get_next_id(struct super_block *sb, struct kqid *qid) |
878 | { |
879 | int type = qid->type; |
880 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
881 | int status = 0; |
882 | |
883 | trace_ocfs2_get_next_id(val1: from_kqid(to: &init_user_ns, qid: *qid), val2: type); |
884 | if (!sb_has_quota_loaded(sb, type)) { |
885 | status = -ESRCH; |
886 | goto out; |
887 | } |
888 | status = ocfs2_lock_global_qf(oinfo: info, ex: 0); |
889 | if (status < 0) |
890 | goto out; |
891 | status = ocfs2_qinfo_lock(oinfo: info, ex: 0); |
892 | if (status < 0) |
893 | goto out_global; |
894 | status = qtree_get_next_id(info: &info->dqi_gi, qid); |
895 | ocfs2_qinfo_unlock(oinfo: info, ex: 0); |
896 | out_global: |
897 | ocfs2_unlock_global_qf(oinfo: info, ex: 0); |
898 | out: |
899 | /* |
900 | * Avoid logging ENOENT since it just means there isn't next ID and |
901 | * ESRCH which means quota isn't enabled for the filesystem. |
902 | */ |
903 | if (status && status != -ENOENT && status != -ESRCH) |
904 | mlog_errno(status); |
905 | return status; |
906 | } |
907 | |
908 | static int ocfs2_mark_dquot_dirty(struct dquot *dquot) |
909 | { |
910 | unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | |
911 | (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | |
912 | (1 << (DQ_LASTSET_B + QIF_INODES_B)) | |
913 | (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | |
914 | (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | |
915 | (1 << (DQ_LASTSET_B + QIF_ITIME_B)); |
916 | int sync = 0; |
917 | int status; |
918 | struct super_block *sb = dquot->dq_sb; |
919 | int type = dquot->dq_id.type; |
920 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
921 | handle_t *handle; |
922 | struct ocfs2_super *osb = OCFS2_SB(sb); |
923 | |
924 | trace_ocfs2_mark_dquot_dirty(val1: from_kqid(to: &init_user_ns, qid: dquot->dq_id), |
925 | val2: type); |
926 | |
927 | /* In case user set some limits, sync dquot immediately to global |
928 | * quota file so that information propagates quicker */ |
929 | spin_lock(lock: &dquot->dq_dqb_lock); |
930 | if (dquot->dq_flags & mask) |
931 | sync = 1; |
932 | spin_unlock(lock: &dquot->dq_dqb_lock); |
933 | /* This is a slight hack but we can't afford getting global quota |
934 | * lock if we already have a transaction started. */ |
935 | if (!sync || journal_current_handle()) { |
936 | status = ocfs2_write_dquot(dquot); |
937 | goto out; |
938 | } |
939 | status = ocfs2_lock_global_qf(oinfo, ex: 1); |
940 | if (status < 0) |
941 | goto out; |
942 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); |
943 | if (IS_ERR(ptr: handle)) { |
944 | status = PTR_ERR(ptr: handle); |
945 | mlog_errno(status); |
946 | goto out_ilock; |
947 | } |
948 | down_write(sem: &sb_dqopt(sb)->dqio_sem); |
949 | status = ocfs2_sync_dquot(dquot); |
950 | if (status < 0) { |
951 | mlog_errno(status); |
952 | goto out_dlock; |
953 | } |
954 | /* Now write updated local dquot structure */ |
955 | status = ocfs2_local_write_dquot(dquot); |
956 | out_dlock: |
957 | up_write(sem: &sb_dqopt(sb)->dqio_sem); |
958 | ocfs2_commit_trans(osb, handle); |
959 | out_ilock: |
960 | ocfs2_unlock_global_qf(oinfo, ex: 1); |
961 | out: |
962 | if (status) |
963 | mlog_errno(status); |
964 | return status; |
965 | } |
966 | |
967 | /* This should happen only after set_dqinfo(). */ |
968 | static int ocfs2_write_info(struct super_block *sb, int type) |
969 | { |
970 | handle_t *handle; |
971 | int status = 0; |
972 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
973 | |
974 | status = ocfs2_lock_global_qf(oinfo, ex: 1); |
975 | if (status < 0) |
976 | goto out; |
977 | handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); |
978 | if (IS_ERR(ptr: handle)) { |
979 | status = PTR_ERR(ptr: handle); |
980 | mlog_errno(status); |
981 | goto out_ilock; |
982 | } |
983 | status = dquot_commit_info(sb, type); |
984 | ocfs2_commit_trans(OCFS2_SB(sb), handle); |
985 | out_ilock: |
986 | ocfs2_unlock_global_qf(oinfo, ex: 1); |
987 | out: |
988 | if (status) |
989 | mlog_errno(status); |
990 | return status; |
991 | } |
992 | |
993 | static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
994 | { |
995 | struct ocfs2_dquot *dquot = |
996 | kmem_cache_zalloc(k: ocfs2_dquot_cachep, GFP_NOFS); |
997 | |
998 | if (!dquot) |
999 | return NULL; |
1000 | return &dquot->dq_dquot; |
1001 | } |
1002 | |
1003 | static void ocfs2_destroy_dquot(struct dquot *dquot) |
1004 | { |
1005 | kmem_cache_free(s: ocfs2_dquot_cachep, objp: dquot); |
1006 | } |
1007 | |
1008 | const struct dquot_operations ocfs2_quota_operations = { |
1009 | /* We never make dquot dirty so .write_dquot is never called */ |
1010 | .acquire_dquot = ocfs2_acquire_dquot, |
1011 | .release_dquot = ocfs2_release_dquot, |
1012 | .mark_dirty = ocfs2_mark_dquot_dirty, |
1013 | .write_info = ocfs2_write_info, |
1014 | .alloc_dquot = ocfs2_alloc_dquot, |
1015 | .destroy_dquot = ocfs2_destroy_dquot, |
1016 | .get_next_id = ocfs2_get_next_id, |
1017 | }; |
1018 | |