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Merge commit 'alsa/master' into for-linus
[linux-2.6-block.git] / fs / ocfs2 / quota_global.c
CommitLineData
9e33d69f
JK		 1/*
2 * Implementation of operations over global quota file
3 */
171bf93c 4#include <linux/spinlock.h>
9e33d69f
JK		 5#include <linux/fs.h>
6#include <linux/quota.h>
7#include <linux/quotaops.h>
8#include <linux/dqblk_qtree.h>
171bf93c
MF		 9#include <linux/jiffies.h>
10#include <linux/writeback.h>
11#include <linux/workqueue.h>
9e33d69f
JK		 12
13#define MLOG_MASK_PREFIX ML_QUOTA
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"
26#include "quota.h"
27
171bf93c
MF		 28static struct workqueue_struct *ocfs2_quota_wq = NULL;
29
30static void qsync_work_fn(struct work_struct *work);
31
9e33d69f
JK		 32static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
33{
34 struct ocfs2_global_disk_dqblk *d = dp;
35 struct mem_dqblk *m = &dquot->dq_dqb;
36
37 /* Update from disk only entries not set by the admin */
38 if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
39 m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
40 m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
41 }
42 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
43 m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
44 if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
45 m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
46 m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
47 }
48 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
49 m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
50 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
51 m->dqb_btime = le64_to_cpu(d->dqb_btime);
52 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
53 m->dqb_itime = le64_to_cpu(d->dqb_itime);
54 OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
55}
56
57static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
58{
59 struct ocfs2_global_disk_dqblk *d = dp;
60 struct mem_dqblk *m = &dquot->dq_dqb;
61
62 d->dqb_id = cpu_to_le32(dquot->dq_id);
63 d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
64 d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
65 d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
66 d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
67 d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
68 d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
69 d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
70 d->dqb_btime = cpu_to_le64(m->dqb_btime);
71 d->dqb_itime = cpu_to_le64(m->dqb_itime);
72}
73
74static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
75{
76 struct ocfs2_global_disk_dqblk *d = dp;
77 struct ocfs2_mem_dqinfo *oinfo =
78 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
79
80 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
81 return 0;
82 return le32_to_cpu(d->dqb_id) == dquot->dq_id;
83}
84
85struct qtree_fmt_operations ocfs2_global_ops = {
86 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
87 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
88 .is_id = ocfs2_global_is_id,
89};
90
684ef278
JB		 91static int ocfs2_validate_quota_block(struct super_block *sb,
92 struct buffer_head *bh)
93{
d6b32bbb
JB		 94 struct ocfs2_disk_dqtrailer *dqt =
95 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
684ef278
JB		 96
97 mlog(0, "Validating quota block %llu\n",
98 (unsigned long long)bh->b_blocknr);
99
d6b32bbb
JB		 100 BUG_ON(!buffer_uptodate(bh));
101
102 /*
103 * If the ecc fails, we return the error but otherwise
104 * leave the filesystem running. We know any error is
105 * local to this block.
106 */
107 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
684ef278
JB		 108}
109
85eb8b73
JB		 110int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
111 struct buffer_head **bh)
9e33d69f 112{
85eb8b73
JB		 113 int rc = 0;
114 struct buffer_head *tmp = *bh;
9e33d69f 115
684ef278
JB		 116 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
117 ocfs2_validate_quota_block);
85eb8b73
JB		 118 if (rc)
119 mlog_errno(rc);
120
121 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
122 if (!rc && !*bh)
123 *bh = tmp;
9e33d69f 124
85eb8b73 125 return rc;
9e33d69f
JK		 126}
127
53a36046
JK		 128static int ocfs2_get_quota_block(struct inode *inode, int block,
129 struct buffer_head **bh)
9e33d69f
JK		 130{
131 u64 pblock, pcount;
53a36046 132 int err;
9e33d69f
JK		 133
134 down_read(&OCFS2_I(inode)->ip_alloc_sem);
53a36046 135 err = ocfs2_extent_map_get_blocks(inode, block, &pblock, &pcount, NULL);
9e33d69f 136 up_read(&OCFS2_I(inode)->ip_alloc_sem);
53a36046
JK		 137 if (err) {
138 mlog_errno(err);
139 return err;
9e33d69f 140 }
53a36046
JK		 141 *bh = sb_getblk(inode->i_sb, pblock);
142 if (!*bh) {
143 err = -EIO;
144 mlog_errno(err);
9e33d69f 145 }
53a36046 146 return err;;
9e33d69f
JK		 147}
148
149/* Read data from global quotafile - avoid pagecache and such because we cannot
150 * afford acquiring the locks... We use quota cluster lock to serialize
151 * operations. Caller is responsible for acquiring it. */
152ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
153 size_t len, loff_t off)
154{
155 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
156 struct inode *gqinode = oinfo->dqi_gqinode;
157 loff_t i_size = i_size_read(gqinode);
158 int offset = off & (sb->s_blocksize - 1);
159 sector_t blk = off >> sb->s_blocksize_bits;
160 int err = 0;
161 struct buffer_head *bh;
162 size_t toread, tocopy;
163
164 if (off > i_size)
165 return 0;
166 if (off + len > i_size)
167 len = i_size - off;
168 toread = len;
169 while (toread > 0) {
dad7d975 170 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
85eb8b73
JB		 171 bh = NULL;
172 err = ocfs2_read_quota_block(gqinode, blk, &bh);
173 if (err) {
9e33d69f
JK		 174 mlog_errno(err);
175 return err;
176 }
177 memcpy(data, bh->b_data + offset, tocopy);
178 brelse(bh);
179 offset = 0;
180 toread -= tocopy;
181 data += tocopy;
182 blk++;
183 }
184 return len;
185}
186
187/* Write to quotafile (we know the transaction is already started and has
188 * enough credits) */
189ssize_t ocfs2_quota_write(struct super_block *sb, int type,
190 const char *data, size_t len, loff_t off)
191{
192 struct mem_dqinfo *info = sb_dqinfo(sb, type);
193 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
194 struct inode *gqinode = oinfo->dqi_gqinode;
195 int offset = off & (sb->s_blocksize - 1);
196 sector_t blk = off >> sb->s_blocksize_bits;
af09e51b 197 int err = 0, new = 0, ja_type;
85eb8b73 198 struct buffer_head *bh = NULL;
9e33d69f
JK		 199 handle_t *handle = journal_current_handle();
200
201 if (!handle) {
202 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
203 "because transaction was not started.\n",
204 (unsigned long long)off, (unsigned long long)len);
205 return -EIO;
206 }
207 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
208 WARN_ON(1);
209 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
210 }
211
212 mutex_lock_nested(&gqinode->i_mutex, I_MUTEX_QUOTA);
213 if (gqinode->i_size < off + len) {
214 down_write(&OCFS2_I(gqinode)->ip_alloc_sem);
215 err = ocfs2_extend_no_holes(gqinode, off + len, off);
216 up_write(&OCFS2_I(gqinode)->ip_alloc_sem);
217 if (err < 0)
218 goto out;
219 err = ocfs2_simple_size_update(gqinode,
220 oinfo->dqi_gqi_bh,
221 off + len);
222 if (err < 0)
223 goto out;
224 new = 1;
225 }
226 /* Not rewriting whole block? */
227 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
228 !new) {
85eb8b73 229 err = ocfs2_read_quota_block(gqinode, blk, &bh);
af09e51b 230 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
9e33d69f 231 } else {
53a36046 232 err = ocfs2_get_quota_block(gqinode, blk, &bh);
af09e51b 233 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
9e33d69f 234 }
af09e51b
JK		 235 if (err) {
236 mlog_errno(err);
237 return err;
9e33d69f
JK		 238 }
239 lock_buffer(bh);
240 if (new)
241 memset(bh->b_data, 0, sb->s_blocksize);
242 memcpy(bh->b_data + offset, data, len);
243 flush_dcache_page(bh->b_page);
af09e51b 244 set_buffer_uptodate(bh);
9e33d69f
JK		 245 unlock_buffer(bh);
246 ocfs2_set_buffer_uptodate(gqinode, bh);
13723d00 247 err = ocfs2_journal_access_dq(handle, gqinode, bh, ja_type);
af09e51b
JK		 248 if (err < 0) {
249 brelse(bh);
250 goto out;
251 }
9e33d69f
JK		 252 err = ocfs2_journal_dirty(handle, bh);
253 brelse(bh);
254 if (err < 0)
255 goto out;
256out:
257 if (err) {
258 mutex_unlock(&gqinode->i_mutex);
259 mlog_errno(err);
260 return err;
261 }
262 gqinode->i_version++;
263 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
264 mutex_unlock(&gqinode->i_mutex);
265 return len;
266}
267
268int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
269{
270 int status;
271 struct buffer_head *bh = NULL;
272
273 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
274 if (status < 0)
275 return status;
276 spin_lock(&dq_data_lock);
277 if (!oinfo->dqi_gqi_count++)
278 oinfo->dqi_gqi_bh = bh;
279 else
280 WARN_ON(bh != oinfo->dqi_gqi_bh);
281 spin_unlock(&dq_data_lock);
282 return 0;
283}
284
285void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
286{
287 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
288 brelse(oinfo->dqi_gqi_bh);
289 spin_lock(&dq_data_lock);
290 if (!--oinfo->dqi_gqi_count)
291 oinfo->dqi_gqi_bh = NULL;
292 spin_unlock(&dq_data_lock);
293}
294
295/* Read information header from global quota file */
296int ocfs2_global_read_info(struct super_block *sb, int type)
297{
298 struct inode *gqinode = NULL;
299 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
300 GROUP_QUOTA_SYSTEM_INODE };
301 struct ocfs2_global_disk_dqinfo dinfo;
302 struct mem_dqinfo *info = sb_dqinfo(sb, type);
303 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
304 int status;
305
306 mlog_entry_void();
307
308 /* Read global header */
309 gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
310 OCFS2_INVALID_SLOT);
311 if (!gqinode) {
312 mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
313 type);
314 status = -EINVAL;
315 goto out_err;
316 }
317 oinfo->dqi_gi.dqi_sb = sb;
318 oinfo->dqi_gi.dqi_type = type;
319 ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
320 oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
321 oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
322 oinfo->dqi_gqi_bh = NULL;
323 oinfo->dqi_gqi_count = 0;
324 oinfo->dqi_gqinode = gqinode;
325 status = ocfs2_lock_global_qf(oinfo, 0);
326 if (status < 0) {
327 mlog_errno(status);
328 goto out_err;
329 }
330 status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
331 sizeof(struct ocfs2_global_disk_dqinfo),
332 OCFS2_GLOBAL_INFO_OFF);
333 ocfs2_unlock_global_qf(oinfo, 0);
334 if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
335 mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
336 status);
337 if (status >= 0)
338 status = -EIO;
339 mlog_errno(status);
340 goto out_err;
341 }
342 info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
343 info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
344 oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
171bf93c 345 oinfo->dqi_syncjiff = msecs_to_jiffies(oinfo->dqi_syncms);
9e33d69f
JK		 346 oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
347 oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
348 oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
349 oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
350 oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
351 OCFS2_QBLK_RESERVED_SPACE;
352 oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
171bf93c
MF		 353 INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
354 queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
355 oinfo->dqi_syncjiff);
356
9e33d69f
JK		 357out_err:
358 mlog_exit(status);
359 return status;
360}
361
362/* Write information to global quota file. Expects exlusive lock on quota
363 * file inode and quota info */
364static int __ocfs2_global_write_info(struct super_block *sb, int type)
365{
366 struct mem_dqinfo *info = sb_dqinfo(sb, type);
367 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
368 struct ocfs2_global_disk_dqinfo dinfo;
369 ssize_t size;
370
371 spin_lock(&dq_data_lock);
372 info->dqi_flags &= ~DQF_INFO_DIRTY;
373 dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
374 dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
375 spin_unlock(&dq_data_lock);
376 dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
377 dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
378 dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
379 dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
380 size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
381 sizeof(struct ocfs2_global_disk_dqinfo),
382 OCFS2_GLOBAL_INFO_OFF);
383 if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
384 mlog(ML_ERROR, "Cannot write global quota info structure\n");
385 if (size >= 0)
386 size = -EIO;
387 return size;
388 }
389 return 0;
390}
391
392int ocfs2_global_write_info(struct super_block *sb, int type)
393{
394 int err;
395 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
396
397 err = ocfs2_qinfo_lock(info, 1);
398 if (err < 0)
399 return err;
400 err = __ocfs2_global_write_info(sb, type);
401 ocfs2_qinfo_unlock(info, 1);
402 return err;
403}
404
405/* Read in information from global quota file and acquire a reference to it.
406 * dquot_acquire() has already started the transaction and locked quota file */
407int ocfs2_global_read_dquot(struct dquot *dquot)
408{
409 int err, err2, ex = 0;
410 struct ocfs2_mem_dqinfo *info =
411 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
412
413 err = ocfs2_qinfo_lock(info, 0);
414 if (err < 0)
415 goto out;
416 err = qtree_read_dquot(&info->dqi_gi, dquot);
417 if (err < 0)
418 goto out_qlock;
419 OCFS2_DQUOT(dquot)->dq_use_count++;
420 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
421 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
422 if (!dquot->dq_off) { /* No real quota entry? */
423 /* Upgrade to exclusive lock for allocation */
424 err = ocfs2_qinfo_lock(info, 1);
425 if (err < 0)
426 goto out_qlock;
427 ex = 1;
428 }
429 err = qtree_write_dquot(&info->dqi_gi, dquot);
430 if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) {
431 err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type);
432 if (!err)
433 err = err2;
434 }
435out_qlock:
436 if (ex)
437 ocfs2_qinfo_unlock(info, 1);
438 ocfs2_qinfo_unlock(info, 0);
439out:
440 if (err < 0)
441 mlog_errno(err);
442 return err;
443}
444
445/* Sync local information about quota modifications with global quota file.
446 * Caller must have started the transaction and obtained exclusive lock for
447 * global quota file inode */
448int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
449{
450 int err, err2;
451 struct super_block *sb = dquot->dq_sb;
452 int type = dquot->dq_type;
453 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
454 struct ocfs2_global_disk_dqblk dqblk;
455 s64 spacechange, inodechange;
456 time_t olditime, oldbtime;
457
458 err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
459 sizeof(struct ocfs2_global_disk_dqblk),
460 dquot->dq_off);
461 if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
462 if (err >= 0) {
463 mlog(ML_ERROR, "Short read from global quota file "
464 "(%u read)\n", err);
465 err = -EIO;
466 }
467 goto out;
468 }
469
470 /* Update space and inode usage. Get also other information from
471 * global quota file so that we don't overwrite any changes there.
472 * We are */
473 spin_lock(&dq_data_lock);
474 spacechange = dquot->dq_dqb.dqb_curspace -
475 OCFS2_DQUOT(dquot)->dq_origspace;
476 inodechange = dquot->dq_dqb.dqb_curinodes -
477 OCFS2_DQUOT(dquot)->dq_originodes;
478 olditime = dquot->dq_dqb.dqb_itime;
479 oldbtime = dquot->dq_dqb.dqb_btime;
480 ocfs2_global_disk2memdqb(dquot, &dqblk);
9a2f3866
JK		 481 mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
482 dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange,
483 dquot->dq_dqb.dqb_curinodes, (long long)inodechange);
9e33d69f
JK		 484 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
485 dquot->dq_dqb.dqb_curspace += spacechange;
486 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
487 dquot->dq_dqb.dqb_curinodes += inodechange;
488 /* Set properly space grace time... */
489 if (dquot->dq_dqb.dqb_bsoftlimit &&
490 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
491 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
492 oldbtime > 0) {
493 if (dquot->dq_dqb.dqb_btime > 0)
494 dquot->dq_dqb.dqb_btime =
495 min(dquot->dq_dqb.dqb_btime, oldbtime);
496 else
497 dquot->dq_dqb.dqb_btime = oldbtime;
498 }
499 } else {
500 dquot->dq_dqb.dqb_btime = 0;
501 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
502 }
503 /* Set properly inode grace time... */
504 if (dquot->dq_dqb.dqb_isoftlimit &&
505 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
506 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
507 olditime > 0) {
508 if (dquot->dq_dqb.dqb_itime > 0)
509 dquot->dq_dqb.dqb_itime =
510 min(dquot->dq_dqb.dqb_itime, olditime);
511 else
512 dquot->dq_dqb.dqb_itime = olditime;
513 }
514 } else {
515 dquot->dq_dqb.dqb_itime = 0;
516 clear_bit(DQ_INODES_B, &dquot->dq_flags);
517 }
518 /* All information is properly updated, clear the flags */
519 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
520 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
521 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
522 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
523 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
524 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
525 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
526 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
527 spin_unlock(&dq_data_lock);
528 err = ocfs2_qinfo_lock(info, freeing);
529 if (err < 0) {
530 mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
531 " (type=%d, id=%u)\n", dquot->dq_type,
532 (unsigned)dquot->dq_id);
533 goto out;
534 }
535 if (freeing)
536 OCFS2_DQUOT(dquot)->dq_use_count--;
537 err = qtree_write_dquot(&info->dqi_gi, dquot);
538 if (err < 0)
539 goto out_qlock;
540 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
541 err = qtree_release_dquot(&info->dqi_gi, dquot);
542 if (info_dirty(sb_dqinfo(sb, type))) {
543 err2 = __ocfs2_global_write_info(sb, type);
544 if (!err)
545 err = err2;
546 }
547 }
548out_qlock:
549 ocfs2_qinfo_unlock(info, freeing);
550out:
551 if (err < 0)
552 mlog_errno(err);
553 return err;
554}
555
171bf93c
MF		 556/*
557 * Functions for periodic syncing of dquots with global file
558 */
559static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
560{
561 handle_t *handle;
562 struct super_block *sb = dquot->dq_sb;
563 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
564 struct ocfs2_super *osb = OCFS2_SB(sb);
565 int status = 0;
566
567 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id,
568 dquot->dq_type, type, sb->s_id);
569 if (type != dquot->dq_type)
570 goto out;
571 status = ocfs2_lock_global_qf(oinfo, 1);
572 if (status < 0)
573 goto out;
574
575 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
576 if (IS_ERR(handle)) {
577 status = PTR_ERR(handle);
578 mlog_errno(status);
579 goto out_ilock;
580 }
581 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
582 status = ocfs2_sync_dquot(dquot);
583 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
584 if (status < 0)
585 mlog_errno(status);
586 /* We have to write local structure as well... */
587 dquot_mark_dquot_dirty(dquot);
588 status = dquot_commit(dquot);
589 if (status < 0)
590 mlog_errno(status);
591 ocfs2_commit_trans(osb, handle);
592out_ilock:
593 ocfs2_unlock_global_qf(oinfo, 1);
594out:
595 mlog_exit(status);
596 return status;
597}
598
599static void qsync_work_fn(struct work_struct *work)
600{
601 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
602 struct ocfs2_mem_dqinfo,
603 dqi_sync_work.work);
604 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
605
606 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
607 queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
608 oinfo->dqi_syncjiff);
609}
610
9e33d69f
JK		 611/*
612 * Wrappers for generic quota functions
613 */
614
615static int ocfs2_write_dquot(struct dquot *dquot)
616{
617 handle_t *handle;
618 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
619 int status = 0;
620
621 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
622
623 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
624 if (IS_ERR(handle)) {
625 status = PTR_ERR(handle);
626 mlog_errno(status);
627 goto out;
628 }
629 status = dquot_commit(dquot);
630 ocfs2_commit_trans(osb, handle);
631out:
632 mlog_exit(status);
633 return status;
634}
635
636int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
637{
638 struct ocfs2_mem_dqinfo *oinfo;
639 int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
640 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
641
642 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
643 return 0;
644
645 oinfo = sb_dqinfo(sb, type)->dqi_priv;
646 /* We modify tree, leaf block, global info, local chunk header,
647 * global and local inode */
648 return oinfo->dqi_gi.dqi_qtree_depth + 2 + 1 +
649 2 * OCFS2_INODE_UPDATE_CREDITS;
650}
651
652static int ocfs2_release_dquot(struct dquot *dquot)
653{
654 handle_t *handle;
655 struct ocfs2_mem_dqinfo *oinfo =
656 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
657 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
658 int status = 0;
659
660 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
661
662 status = ocfs2_lock_global_qf(oinfo, 1);
663 if (status < 0)
664 goto out;
665 handle = ocfs2_start_trans(osb,
666 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
667 if (IS_ERR(handle)) {
668 status = PTR_ERR(handle);
669 mlog_errno(status);
670 goto out_ilock;
671 }
672 status = dquot_release(dquot);
673 ocfs2_commit_trans(osb, handle);
674out_ilock:
675 ocfs2_unlock_global_qf(oinfo, 1);
676out:
677 mlog_exit(status);
678 return status;
679}
680
681int ocfs2_calc_qinit_credits(struct super_block *sb, int type)
682{
683 struct ocfs2_mem_dqinfo *oinfo;
684 int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
685 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
686 struct ocfs2_dinode *lfe, *gfe;
687
688 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
689 return 0;
690
691 oinfo = sb_dqinfo(sb, type)->dqi_priv;
692 gfe = (struct ocfs2_dinode *)oinfo->dqi_gqi_bh->b_data;
693 lfe = (struct ocfs2_dinode *)oinfo->dqi_lqi_bh->b_data;
694 /* We can extend local file + global file. In local file we
695 * can modify info, chunk header block and dquot block. In
696 * global file we can modify info, tree and leaf block */
697 return ocfs2_calc_extend_credits(sb, &lfe->id2.i_list, 0) +
698 ocfs2_calc_extend_credits(sb, &gfe->id2.i_list, 0) +
699 3 + oinfo->dqi_gi.dqi_qtree_depth + 2;
700}
701
702static int ocfs2_acquire_dquot(struct dquot *dquot)
703{
704 handle_t *handle;
705 struct ocfs2_mem_dqinfo *oinfo =
706 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
707 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
708 int status = 0;
709
710 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
711 /* We need an exclusive lock, because we're going to update use count
712 * and instantiate possibly new dquot structure */
713 status = ocfs2_lock_global_qf(oinfo, 1);
714 if (status < 0)
715 goto out;
716 handle = ocfs2_start_trans(osb,
717 ocfs2_calc_qinit_credits(dquot->dq_sb, dquot->dq_type));
718 if (IS_ERR(handle)) {
719 status = PTR_ERR(handle);
720 mlog_errno(status);
721 goto out_ilock;
722 }
723 status = dquot_acquire(dquot);
724 ocfs2_commit_trans(osb, handle);
725out_ilock:
726 ocfs2_unlock_global_qf(oinfo, 1);
727out:
728 mlog_exit(status);
729 return status;
730}
731
732static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
733{
734 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
735 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
736 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
737 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
738 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
739 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
740 int sync = 0;
741 int status;
742 struct super_block *sb = dquot->dq_sb;
743 int type = dquot->dq_type;
744 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
745 handle_t *handle;
746 struct ocfs2_super *osb = OCFS2_SB(sb);
747
748 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
749 dquot_mark_dquot_dirty(dquot);
750
751 /* In case user set some limits, sync dquot immediately to global
752 * quota file so that information propagates quicker */
753 spin_lock(&dq_data_lock);
754 if (dquot->dq_flags & mask)
755 sync = 1;
756 spin_unlock(&dq_data_lock);
f8afead7
JK		 757 /* This is a slight hack but we can't afford getting global quota
758 * lock if we already have a transaction started. */
759 if (!sync || journal_current_handle()) {
9e33d69f
JK		 760 status = ocfs2_write_dquot(dquot);
761 goto out;
762 }
763 status = ocfs2_lock_global_qf(oinfo, 1);
764 if (status < 0)
765 goto out;
766 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
767 if (IS_ERR(handle)) {
768 status = PTR_ERR(handle);
769 mlog_errno(status);
770 goto out_ilock;
771 }
772 status = ocfs2_sync_dquot(dquot);
773 if (status < 0) {
774 mlog_errno(status);
775 goto out_trans;
776 }
777 /* Now write updated local dquot structure */
778 status = dquot_commit(dquot);
779out_trans:
780 ocfs2_commit_trans(osb, handle);
781out_ilock:
782 ocfs2_unlock_global_qf(oinfo, 1);
783out:
784 mlog_exit(status);
785 return status;
786}
787
788/* This should happen only after set_dqinfo(). */
789static int ocfs2_write_info(struct super_block *sb, int type)
790{
791 handle_t *handle;
792 int status = 0;
793 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
794
795 mlog_entry_void();
796
797 status = ocfs2_lock_global_qf(oinfo, 1);
798 if (status < 0)
799 goto out;
800 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
801 if (IS_ERR(handle)) {
802 status = PTR_ERR(handle);
803 mlog_errno(status);
804 goto out_ilock;
805 }
806 status = dquot_commit_info(sb, type);
807 ocfs2_commit_trans(OCFS2_SB(sb), handle);
808out_ilock:
809 ocfs2_unlock_global_qf(oinfo, 1);
810out:
811 mlog_exit(status);
812 return status;
813}
814
9e33d69f
JK		 815static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
816{
817 struct ocfs2_dquot *dquot =
818 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
819
820 if (!dquot)
821 return NULL;
822 return &dquot->dq_dquot;
823}
824
825static void ocfs2_destroy_dquot(struct dquot *dquot)
826{
827 kmem_cache_free(ocfs2_dquot_cachep, dquot);
828}
829
830struct dquot_operations ocfs2_quota_operations = {
c475146d
JK		 831 .initialize = dquot_initialize,
832 .drop = dquot_drop,
9e33d69f
JK		 833 .alloc_space = dquot_alloc_space,
834 .alloc_inode = dquot_alloc_inode,
835 .free_space = dquot_free_space,
836 .free_inode = dquot_free_inode,
837 .transfer = dquot_transfer,
838 .write_dquot = ocfs2_write_dquot,
839 .acquire_dquot = ocfs2_acquire_dquot,
840 .release_dquot = ocfs2_release_dquot,
841 .mark_dirty = ocfs2_mark_dquot_dirty,
842 .write_info = ocfs2_write_info,
843 .alloc_dquot = ocfs2_alloc_dquot,
844 .destroy_dquot = ocfs2_destroy_dquot,
845};
171bf93c
MF		 846
847int ocfs2_quota_setup(void)
848{
849 ocfs2_quota_wq = create_workqueue("o2quot");
850 if (!ocfs2_quota_wq)
851 return -ENOMEM;
852 return 0;
853}
854
855void ocfs2_quota_shutdown(void)
856{
857 if (ocfs2_quota_wq) {
858 flush_workqueue(ocfs2_quota_wq);
859 destroy_workqueue(ocfs2_quota_wq);
860 ocfs2_quota_wq = NULL;
861 }
862}
Linux 6.x block layer and io_uring tree(s)