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ocfs2: Zero out padding of on disk dquot structure
[deliverable/linux.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);
7669f54c 72 d->dqb_pad1 = d->dqb_pad2 = 0;
9e33d69f
JK		 73}
74
75static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
76{
77 struct ocfs2_global_disk_dqblk *d = dp;
78 struct ocfs2_mem_dqinfo *oinfo =
79 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
80
81 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
82 return 0;
83 return le32_to_cpu(d->dqb_id) == dquot->dq_id;
84}
85
86struct qtree_fmt_operations ocfs2_global_ops = {
87 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
88 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
89 .is_id = ocfs2_global_is_id,
90};
91
684ef278
JB		 92static int ocfs2_validate_quota_block(struct super_block *sb,
93 struct buffer_head *bh)
94{
d6b32bbb
JB		 95 struct ocfs2_disk_dqtrailer *dqt =
96 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
684ef278
JB		 97
98 mlog(0, "Validating quota block %llu\n",
99 (unsigned long long)bh->b_blocknr);
100
d6b32bbb
JB		 101 BUG_ON(!buffer_uptodate(bh));
102
103 /*
104 * If the ecc fails, we return the error but otherwise
105 * leave the filesystem running. We know any error is
106 * local to this block.
107 */
108 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
684ef278
JB		 109}
110
85eb8b73
JB		 111int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
112 struct buffer_head **bh)
9e33d69f 113{
85eb8b73
JB		 114 int rc = 0;
115 struct buffer_head *tmp = *bh;
9e33d69f 116
684ef278
JB		 117 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
118 ocfs2_validate_quota_block);
85eb8b73
JB		 119 if (rc)
120 mlog_errno(rc);
121
122 /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
123 if (!rc && !*bh)
124 *bh = tmp;
9e33d69f 125
85eb8b73 126 return rc;
9e33d69f
JK		 127}
128
53a36046
JK		 129static int ocfs2_get_quota_block(struct inode *inode, int block,
130 struct buffer_head **bh)
9e33d69f
JK		 131{
132 u64 pblock, pcount;
53a36046 133 int err;
9e33d69f
JK		 134
135 down_read(&OCFS2_I(inode)->ip_alloc_sem);
53a36046 136 err = ocfs2_extent_map_get_blocks(inode, block, &pblock, &pcount, NULL);
9e33d69f 137 up_read(&OCFS2_I(inode)->ip_alloc_sem);
53a36046
JK		 138 if (err) {
139 mlog_errno(err);
140 return err;
9e33d69f 141 }
53a36046
JK		 142 *bh = sb_getblk(inode->i_sb, pblock);
143 if (!*bh) {
144 err = -EIO;
145 mlog_errno(err);
9e33d69f 146 }
53a36046 147 return err;;
9e33d69f
JK		 148}
149
150/* Read data from global quotafile - avoid pagecache and such because we cannot
151 * afford acquiring the locks... We use quota cluster lock to serialize
152 * operations. Caller is responsible for acquiring it. */
153ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
154 size_t len, loff_t off)
155{
156 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
157 struct inode *gqinode = oinfo->dqi_gqinode;
158 loff_t i_size = i_size_read(gqinode);
159 int offset = off & (sb->s_blocksize - 1);
160 sector_t blk = off >> sb->s_blocksize_bits;
161 int err = 0;
162 struct buffer_head *bh;
163 size_t toread, tocopy;
164
165 if (off > i_size)
166 return 0;
167 if (off + len > i_size)
168 len = i_size - off;
169 toread = len;
170 while (toread > 0) {
dad7d975 171 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
85eb8b73
JB		 172 bh = NULL;
173 err = ocfs2_read_quota_block(gqinode, blk, &bh);
174 if (err) {
9e33d69f
JK		 175 mlog_errno(err);
176 return err;
177 }
178 memcpy(data, bh->b_data + offset, tocopy);
179 brelse(bh);
180 offset = 0;
181 toread -= tocopy;
182 data += tocopy;
183 blk++;
184 }
185 return len;
186}
187
188/* Write to quotafile (we know the transaction is already started and has
189 * enough credits) */
190ssize_t ocfs2_quota_write(struct super_block *sb, int type,
191 const char *data, size_t len, loff_t off)
192{
193 struct mem_dqinfo *info = sb_dqinfo(sb, type);
194 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
195 struct inode *gqinode = oinfo->dqi_gqinode;
196 int offset = off & (sb->s_blocksize - 1);
197 sector_t blk = off >> sb->s_blocksize_bits;
af09e51b 198 int err = 0, new = 0, ja_type;
85eb8b73 199 struct buffer_head *bh = NULL;
9e33d69f
JK		 200 handle_t *handle = journal_current_handle();
201
202 if (!handle) {
203 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
204 "because transaction was not started.\n",
205 (unsigned long long)off, (unsigned long long)len);
206 return -EIO;
207 }
208 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
209 WARN_ON(1);
210 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
211 }
212
213 mutex_lock_nested(&gqinode->i_mutex, I_MUTEX_QUOTA);
214 if (gqinode->i_size < off + len) {
b57ac2c4
JK		 215 loff_t rounded_end =
216 ocfs2_align_bytes_to_blocks(sb, off + len);
217
9e33d69f 218 down_write(&OCFS2_I(gqinode)->ip_alloc_sem);
b57ac2c4 219 err = ocfs2_extend_no_holes(gqinode, rounded_end, off);
9e33d69f
JK		 220 up_write(&OCFS2_I(gqinode)->ip_alloc_sem);
221 if (err < 0)
222 goto out;
223 err = ocfs2_simple_size_update(gqinode,
224 oinfo->dqi_gqi_bh,
b57ac2c4 225 rounded_end);
9e33d69f
JK		 226 if (err < 0)
227 goto out;
228 new = 1;
229 }
230 /* Not rewriting whole block? */
231 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
232 !new) {
85eb8b73 233 err = ocfs2_read_quota_block(gqinode, blk, &bh);
af09e51b 234 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
9e33d69f 235 } else {
53a36046 236 err = ocfs2_get_quota_block(gqinode, blk, &bh);
af09e51b 237 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
9e33d69f 238 }
af09e51b
JK		 239 if (err) {
240 mlog_errno(err);
241 return err;
9e33d69f
JK		 242 }
243 lock_buffer(bh);
244 if (new)
245 memset(bh->b_data, 0, sb->s_blocksize);
246 memcpy(bh->b_data + offset, data, len);
247 flush_dcache_page(bh->b_page);
af09e51b 248 set_buffer_uptodate(bh);
9e33d69f
JK		 249 unlock_buffer(bh);
250 ocfs2_set_buffer_uptodate(gqinode, bh);
13723d00 251 err = ocfs2_journal_access_dq(handle, gqinode, bh, ja_type);
af09e51b
JK		 252 if (err < 0) {
253 brelse(bh);
254 goto out;
255 }
9e33d69f
JK		 256 err = ocfs2_journal_dirty(handle, bh);
257 brelse(bh);
258 if (err < 0)
259 goto out;
260out:
261 if (err) {
262 mutex_unlock(&gqinode->i_mutex);
263 mlog_errno(err);
264 return err;
265 }
266 gqinode->i_version++;
267 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
268 mutex_unlock(&gqinode->i_mutex);
269 return len;
270}
271
272int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
273{
274 int status;
275 struct buffer_head *bh = NULL;
276
277 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
278 if (status < 0)
279 return status;
280 spin_lock(&dq_data_lock);
281 if (!oinfo->dqi_gqi_count++)
282 oinfo->dqi_gqi_bh = bh;
283 else
284 WARN_ON(bh != oinfo->dqi_gqi_bh);
285 spin_unlock(&dq_data_lock);
286 return 0;
287}
288
289void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
290{
291 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
292 brelse(oinfo->dqi_gqi_bh);
293 spin_lock(&dq_data_lock);
294 if (!--oinfo->dqi_gqi_count)
295 oinfo->dqi_gqi_bh = NULL;
296 spin_unlock(&dq_data_lock);
297}
298
299/* Read information header from global quota file */
300int ocfs2_global_read_info(struct super_block *sb, int type)
301{
302 struct inode *gqinode = NULL;
303 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
304 GROUP_QUOTA_SYSTEM_INODE };
305 struct ocfs2_global_disk_dqinfo dinfo;
306 struct mem_dqinfo *info = sb_dqinfo(sb, type);
307 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
308 int status;
309
310 mlog_entry_void();
311
312 /* Read global header */
313 gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
314 OCFS2_INVALID_SLOT);
315 if (!gqinode) {
316 mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
317 type);
318 status = -EINVAL;
319 goto out_err;
320 }
321 oinfo->dqi_gi.dqi_sb = sb;
322 oinfo->dqi_gi.dqi_type = type;
323 ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
324 oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
325 oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
326 oinfo->dqi_gqi_bh = NULL;
327 oinfo->dqi_gqi_count = 0;
328 oinfo->dqi_gqinode = gqinode;
329 status = ocfs2_lock_global_qf(oinfo, 0);
330 if (status < 0) {
331 mlog_errno(status);
332 goto out_err;
333 }
334 status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
335 sizeof(struct ocfs2_global_disk_dqinfo),
336 OCFS2_GLOBAL_INFO_OFF);
337 ocfs2_unlock_global_qf(oinfo, 0);
338 if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
339 mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
340 status);
341 if (status >= 0)
342 status = -EIO;
343 mlog_errno(status);
344 goto out_err;
345 }
346 info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
347 info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
348 oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
171bf93c 349 oinfo->dqi_syncjiff = msecs_to_jiffies(oinfo->dqi_syncms);
9e33d69f
JK		 350 oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
351 oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
352 oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
353 oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
354 oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
355 OCFS2_QBLK_RESERVED_SPACE;
356 oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
171bf93c
MF		 357 INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
358 queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
359 oinfo->dqi_syncjiff);
360
9e33d69f
JK		 361out_err:
362 mlog_exit(status);
363 return status;
364}
365
366/* Write information to global quota file. Expects exlusive lock on quota
367 * file inode and quota info */
368static int __ocfs2_global_write_info(struct super_block *sb, int type)
369{
370 struct mem_dqinfo *info = sb_dqinfo(sb, type);
371 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
372 struct ocfs2_global_disk_dqinfo dinfo;
373 ssize_t size;
374
375 spin_lock(&dq_data_lock);
376 info->dqi_flags &= ~DQF_INFO_DIRTY;
377 dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
378 dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
379 spin_unlock(&dq_data_lock);
380 dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
381 dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
382 dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
383 dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
384 size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
385 sizeof(struct ocfs2_global_disk_dqinfo),
386 OCFS2_GLOBAL_INFO_OFF);
387 if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
388 mlog(ML_ERROR, "Cannot write global quota info structure\n");
389 if (size >= 0)
390 size = -EIO;
391 return size;
392 }
393 return 0;
394}
395
396int ocfs2_global_write_info(struct super_block *sb, int type)
397{
398 int err;
399 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
400
401 err = ocfs2_qinfo_lock(info, 1);
402 if (err < 0)
403 return err;
404 err = __ocfs2_global_write_info(sb, type);
405 ocfs2_qinfo_unlock(info, 1);
406 return err;
407}
408
409/* Read in information from global quota file and acquire a reference to it.
410 * dquot_acquire() has already started the transaction and locked quota file */
411int ocfs2_global_read_dquot(struct dquot *dquot)
412{
413 int err, err2, ex = 0;
414 struct ocfs2_mem_dqinfo *info =
415 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
416
417 err = ocfs2_qinfo_lock(info, 0);
418 if (err < 0)
419 goto out;
420 err = qtree_read_dquot(&info->dqi_gi, dquot);
421 if (err < 0)
422 goto out_qlock;
423 OCFS2_DQUOT(dquot)->dq_use_count++;
424 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
425 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
426 if (!dquot->dq_off) { /* No real quota entry? */
427 /* Upgrade to exclusive lock for allocation */
4e8a3019 428 ocfs2_qinfo_unlock(info, 0);
9e33d69f
JK		 429 err = ocfs2_qinfo_lock(info, 1);
430 if (err < 0)
431 goto out_qlock;
432 ex = 1;
433 }
434 err = qtree_write_dquot(&info->dqi_gi, dquot);
435 if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) {
436 err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type);
437 if (!err)
438 err = err2;
439 }
440out_qlock:
441 if (ex)
442 ocfs2_qinfo_unlock(info, 1);
4e8a3019
JK		 443 else
444 ocfs2_qinfo_unlock(info, 0);
9e33d69f
JK		 445out:
446 if (err < 0)
447 mlog_errno(err);
448 return err;
449}
450
451/* Sync local information about quota modifications with global quota file.
452 * Caller must have started the transaction and obtained exclusive lock for
453 * global quota file inode */
454int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
455{
456 int err, err2;
457 struct super_block *sb = dquot->dq_sb;
458 int type = dquot->dq_type;
459 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
460 struct ocfs2_global_disk_dqblk dqblk;
461 s64 spacechange, inodechange;
462 time_t olditime, oldbtime;
463
464 err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
465 sizeof(struct ocfs2_global_disk_dqblk),
466 dquot->dq_off);
467 if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
468 if (err >= 0) {
469 mlog(ML_ERROR, "Short read from global quota file "
470 "(%u read)\n", err);
471 err = -EIO;
472 }
473 goto out;
474 }
475
476 /* Update space and inode usage. Get also other information from
477 * global quota file so that we don't overwrite any changes there.
478 * We are */
479 spin_lock(&dq_data_lock);
480 spacechange = dquot->dq_dqb.dqb_curspace -
481 OCFS2_DQUOT(dquot)->dq_origspace;
482 inodechange = dquot->dq_dqb.dqb_curinodes -
483 OCFS2_DQUOT(dquot)->dq_originodes;
484 olditime = dquot->dq_dqb.dqb_itime;
485 oldbtime = dquot->dq_dqb.dqb_btime;
486 ocfs2_global_disk2memdqb(dquot, &dqblk);
9a2f3866
JK		 487 mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
488 dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange,
489 dquot->dq_dqb.dqb_curinodes, (long long)inodechange);
9e33d69f
JK		 490 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
491 dquot->dq_dqb.dqb_curspace += spacechange;
492 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
493 dquot->dq_dqb.dqb_curinodes += inodechange;
494 /* Set properly space grace time... */
495 if (dquot->dq_dqb.dqb_bsoftlimit &&
496 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
497 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
498 oldbtime > 0) {
499 if (dquot->dq_dqb.dqb_btime > 0)
500 dquot->dq_dqb.dqb_btime =
501 min(dquot->dq_dqb.dqb_btime, oldbtime);
502 else
503 dquot->dq_dqb.dqb_btime = oldbtime;
504 }
505 } else {
506 dquot->dq_dqb.dqb_btime = 0;
507 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
508 }
509 /* Set properly inode grace time... */
510 if (dquot->dq_dqb.dqb_isoftlimit &&
511 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
512 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
513 olditime > 0) {
514 if (dquot->dq_dqb.dqb_itime > 0)
515 dquot->dq_dqb.dqb_itime =
516 min(dquot->dq_dqb.dqb_itime, olditime);
517 else
518 dquot->dq_dqb.dqb_itime = olditime;
519 }
520 } else {
521 dquot->dq_dqb.dqb_itime = 0;
522 clear_bit(DQ_INODES_B, &dquot->dq_flags);
523 }
524 /* All information is properly updated, clear the flags */
525 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
526 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
527 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
528 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
529 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
530 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
531 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
532 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
533 spin_unlock(&dq_data_lock);
534 err = ocfs2_qinfo_lock(info, freeing);
535 if (err < 0) {
536 mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
537 " (type=%d, id=%u)\n", dquot->dq_type,
538 (unsigned)dquot->dq_id);
539 goto out;
540 }
541 if (freeing)
542 OCFS2_DQUOT(dquot)->dq_use_count--;
543 err = qtree_write_dquot(&info->dqi_gi, dquot);
544 if (err < 0)
545 goto out_qlock;
546 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
547 err = qtree_release_dquot(&info->dqi_gi, dquot);
548 if (info_dirty(sb_dqinfo(sb, type))) {
549 err2 = __ocfs2_global_write_info(sb, type);
550 if (!err)
551 err = err2;
552 }
553 }
554out_qlock:
555 ocfs2_qinfo_unlock(info, freeing);
556out:
557 if (err < 0)
558 mlog_errno(err);
559 return err;
560}
561
171bf93c
MF		 562/*
563 * Functions for periodic syncing of dquots with global file
564 */
565static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
566{
567 handle_t *handle;
568 struct super_block *sb = dquot->dq_sb;
569 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
570 struct ocfs2_super *osb = OCFS2_SB(sb);
571 int status = 0;
572
573 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id,
574 dquot->dq_type, type, sb->s_id);
575 if (type != dquot->dq_type)
576 goto out;
577 status = ocfs2_lock_global_qf(oinfo, 1);
578 if (status < 0)
579 goto out;
580
581 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
582 if (IS_ERR(handle)) {
583 status = PTR_ERR(handle);
584 mlog_errno(status);
585 goto out_ilock;
586 }
587 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
588 status = ocfs2_sync_dquot(dquot);
589 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
590 if (status < 0)
591 mlog_errno(status);
592 /* We have to write local structure as well... */
593 dquot_mark_dquot_dirty(dquot);
594 status = dquot_commit(dquot);
595 if (status < 0)
596 mlog_errno(status);
597 ocfs2_commit_trans(osb, handle);
598out_ilock:
599 ocfs2_unlock_global_qf(oinfo, 1);
600out:
601 mlog_exit(status);
602 return status;
603}
604
605static void qsync_work_fn(struct work_struct *work)
606{
607 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
608 struct ocfs2_mem_dqinfo,
609 dqi_sync_work.work);
610 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
611
612 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
613 queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
614 oinfo->dqi_syncjiff);
615}
616
9e33d69f
JK		 617/*
618 * Wrappers for generic quota functions
619 */
620
621static int ocfs2_write_dquot(struct dquot *dquot)
622{
623 handle_t *handle;
624 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
625 int status = 0;
626
627 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
628
629 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
630 if (IS_ERR(handle)) {
631 status = PTR_ERR(handle);
632 mlog_errno(status);
633 goto out;
634 }
635 status = dquot_commit(dquot);
636 ocfs2_commit_trans(osb, handle);
637out:
638 mlog_exit(status);
639 return status;
640}
641
642int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
643{
644 struct ocfs2_mem_dqinfo *oinfo;
645 int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
646 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
647
648 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
649 return 0;
650
651 oinfo = sb_dqinfo(sb, type)->dqi_priv;
652 /* We modify tree, leaf block, global info, local chunk header,
653 * global and local inode */
654 return oinfo->dqi_gi.dqi_qtree_depth + 2 + 1 +
655 2 * OCFS2_INODE_UPDATE_CREDITS;
656}
657
658static int ocfs2_release_dquot(struct dquot *dquot)
659{
660 handle_t *handle;
661 struct ocfs2_mem_dqinfo *oinfo =
662 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
663 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
664 int status = 0;
665
666 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
667
668 status = ocfs2_lock_global_qf(oinfo, 1);
669 if (status < 0)
670 goto out;
671 handle = ocfs2_start_trans(osb,
672 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
673 if (IS_ERR(handle)) {
674 status = PTR_ERR(handle);
675 mlog_errno(status);
676 goto out_ilock;
677 }
678 status = dquot_release(dquot);
679 ocfs2_commit_trans(osb, handle);
680out_ilock:
681 ocfs2_unlock_global_qf(oinfo, 1);
682out:
683 mlog_exit(status);
684 return status;
685}
686
687int ocfs2_calc_qinit_credits(struct super_block *sb, int type)
688{
689 struct ocfs2_mem_dqinfo *oinfo;
690 int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
691 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
692 struct ocfs2_dinode *lfe, *gfe;
693
694 if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
695 return 0;
696
697 oinfo = sb_dqinfo(sb, type)->dqi_priv;
698 gfe = (struct ocfs2_dinode *)oinfo->dqi_gqi_bh->b_data;
699 lfe = (struct ocfs2_dinode *)oinfo->dqi_lqi_bh->b_data;
700 /* We can extend local file + global file. In local file we
701 * can modify info, chunk header block and dquot block. In
702 * global file we can modify info, tree and leaf block */
703 return ocfs2_calc_extend_credits(sb, &lfe->id2.i_list, 0) +
704 ocfs2_calc_extend_credits(sb, &gfe->id2.i_list, 0) +
705 3 + oinfo->dqi_gi.dqi_qtree_depth + 2;
706}
707
708static int ocfs2_acquire_dquot(struct dquot *dquot)
709{
710 handle_t *handle;
711 struct ocfs2_mem_dqinfo *oinfo =
712 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
713 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
714 int status = 0;
715
716 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
717 /* We need an exclusive lock, because we're going to update use count
718 * and instantiate possibly new dquot structure */
719 status = ocfs2_lock_global_qf(oinfo, 1);
720 if (status < 0)
721 goto out;
722 handle = ocfs2_start_trans(osb,
723 ocfs2_calc_qinit_credits(dquot->dq_sb, dquot->dq_type));
724 if (IS_ERR(handle)) {
725 status = PTR_ERR(handle);
726 mlog_errno(status);
727 goto out_ilock;
728 }
729 status = dquot_acquire(dquot);
730 ocfs2_commit_trans(osb, handle);
731out_ilock:
732 ocfs2_unlock_global_qf(oinfo, 1);
733out:
734 mlog_exit(status);
735 return status;
736}
737
738static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
739{
740 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
741 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
742 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
743 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
744 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
745 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
746 int sync = 0;
747 int status;
748 struct super_block *sb = dquot->dq_sb;
749 int type = dquot->dq_type;
750 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
751 handle_t *handle;
752 struct ocfs2_super *osb = OCFS2_SB(sb);
753
754 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
755 dquot_mark_dquot_dirty(dquot);
756
757 /* In case user set some limits, sync dquot immediately to global
758 * quota file so that information propagates quicker */
759 spin_lock(&dq_data_lock);
760 if (dquot->dq_flags & mask)
761 sync = 1;
762 spin_unlock(&dq_data_lock);
f8afead7
JK		 763 /* This is a slight hack but we can't afford getting global quota
764 * lock if we already have a transaction started. */
765 if (!sync || journal_current_handle()) {
9e33d69f
JK		 766 status = ocfs2_write_dquot(dquot);
767 goto out;
768 }
769 status = ocfs2_lock_global_qf(oinfo, 1);
770 if (status < 0)
771 goto out;
772 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
773 if (IS_ERR(handle)) {
774 status = PTR_ERR(handle);
775 mlog_errno(status);
776 goto out_ilock;
777 }
778 status = ocfs2_sync_dquot(dquot);
779 if (status < 0) {
780 mlog_errno(status);
781 goto out_trans;
782 }
783 /* Now write updated local dquot structure */
784 status = dquot_commit(dquot);
785out_trans:
786 ocfs2_commit_trans(osb, handle);
787out_ilock:
788 ocfs2_unlock_global_qf(oinfo, 1);
789out:
790 mlog_exit(status);
791 return status;
792}
793
794/* This should happen only after set_dqinfo(). */
795static int ocfs2_write_info(struct super_block *sb, int type)
796{
797 handle_t *handle;
798 int status = 0;
799 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
800
801 mlog_entry_void();
802
803 status = ocfs2_lock_global_qf(oinfo, 1);
804 if (status < 0)
805 goto out;
806 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
807 if (IS_ERR(handle)) {
808 status = PTR_ERR(handle);
809 mlog_errno(status);
810 goto out_ilock;
811 }
812 status = dquot_commit_info(sb, type);
813 ocfs2_commit_trans(OCFS2_SB(sb), handle);
814out_ilock:
815 ocfs2_unlock_global_qf(oinfo, 1);
816out:
817 mlog_exit(status);
818 return status;
819}
820
9e33d69f
JK		 821static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
822{
823 struct ocfs2_dquot *dquot =
824 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
825
826 if (!dquot)
827 return NULL;
828 return &dquot->dq_dquot;
829}
830
831static void ocfs2_destroy_dquot(struct dquot *dquot)
832{
833 kmem_cache_free(ocfs2_dquot_cachep, dquot);
834}
835
836struct dquot_operations ocfs2_quota_operations = {
c475146d
JK		 837 .initialize = dquot_initialize,
838 .drop = dquot_drop,
9e33d69f
JK		 839 .alloc_space = dquot_alloc_space,
840 .alloc_inode = dquot_alloc_inode,
841 .free_space = dquot_free_space,
842 .free_inode = dquot_free_inode,
843 .transfer = dquot_transfer,
844 .write_dquot = ocfs2_write_dquot,
845 .acquire_dquot = ocfs2_acquire_dquot,
846 .release_dquot = ocfs2_release_dquot,
847 .mark_dirty = ocfs2_mark_dquot_dirty,
848 .write_info = ocfs2_write_info,
849 .alloc_dquot = ocfs2_alloc_dquot,
850 .destroy_dquot = ocfs2_destroy_dquot,
851};
171bf93c
MF		 852
853int ocfs2_quota_setup(void)
854{
855 ocfs2_quota_wq = create_workqueue("o2quot");
856 if (!ocfs2_quota_wq)
857 return -ENOMEM;
858 return 0;
859}
860
861void ocfs2_quota_shutdown(void)
862{
863 if (ocfs2_quota_wq) {
864 flush_workqueue(ocfs2_quota_wq);
865 destroy_workqueue(ocfs2_quota_wq);
866 ocfs2_quota_wq = NULL;
867 }
868}
Linux kernel - Deliverables
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