blob: 332a281f217ed021dee419722bd4dd5ca83de9a9 [file] [log] [blame]
Jan Kara9e33d692008-08-25 19:56:50 +02001/*
2 * Implementation of operations over global quota file
3 */
Mark Fasheh171bf932008-10-20 15:36:47 +02004#include <linux/spinlock.h>
Jan Kara9e33d692008-08-25 19:56:50 +02005#include <linux/fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09006#include <linux/slab.h>
Jan Kara9e33d692008-08-25 19:56:50 +02007#include <linux/quota.h>
8#include <linux/quotaops.h>
9#include <linux/dqblk_qtree.h>
Mark Fasheh171bf932008-10-20 15:36:47 +020010#include <linux/jiffies.h>
11#include <linux/writeback.h>
12#include <linux/workqueue.h>
Jan Kara9e33d692008-08-25 19:56:50 +020013
Jan Kara9e33d692008-08-25 19:56:50 +020014#include <cluster/masklog.h>
15
16#include "ocfs2_fs.h"
17#include "ocfs2.h"
18#include "alloc.h"
Joel Beckerd6b32bb2008-10-17 14:55:01 -070019#include "blockcheck.h"
Jan Kara9e33d692008-08-25 19:56:50 +020020#include "inode.h"
21#include "journal.h"
22#include "file.h"
23#include "sysfile.h"
24#include "dlmglue.h"
25#include "uptodate.h"
Jan Karaada50822009-08-03 18:24:21 +020026#include "super.h"
Jan Karaf64dd442010-04-28 00:22:30 +020027#include "buffer_head_io.h"
Jan Kara9e33d692008-08-25 19:56:50 +020028#include "quota.h"
Tao Ma1db986a2011-02-23 22:19:12 +080029#include "ocfs2_trace.h"
Jan Kara9e33d692008-08-25 19:56:50 +020030
Jan Karafb8dd8d2010-03-31 16:25:37 +020031/*
32 * Locking of quotas with OCFS2 is rather complex. Here are rules that
33 * should be obeyed by all the functions:
34 * - any write of quota structure (either to local or global file) is protected
35 * by dqio_mutex or dquot->dq_lock.
36 * - any modification of global quota file holds inode cluster lock, i_mutex,
37 * and ip_alloc_sem of the global quota file (achieved by
38 * ocfs2_lock_global_qf). It also has to hold qinfo_lock.
39 * - an allocation of new blocks for local quota file is protected by
40 * its ip_alloc_sem
41 *
42 * A rough sketch of locking dependencies (lf = local file, gf = global file):
43 * Normal filesystem operation:
44 * start_trans -> dqio_mutex -> write to lf
45 * Syncing of local and global file:
46 * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
47 * write to gf
48 * -> write to lf
49 * Acquire dquot for the first time:
50 * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf
51 * -> alloc space for gf
52 * -> start_trans -> qinfo_lock -> write to gf
53 * -> ip_alloc_sem of lf -> alloc space for lf
54 * -> write to lf
55 * Release last reference to dquot:
56 * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf
57 * -> write to lf
58 * Note that all the above operations also hold the inode cluster lock of lf.
59 * Recovery:
60 * inode cluster lock of recovered lf
61 * -> read bitmaps -> ip_alloc_sem of lf
62 * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
63 * write to gf
64 */
65
Mark Fasheh171bf932008-10-20 15:36:47 +020066static void qsync_work_fn(struct work_struct *work);
67
Jan Kara9e33d692008-08-25 19:56:50 +020068static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
69{
70 struct ocfs2_global_disk_dqblk *d = dp;
71 struct mem_dqblk *m = &dquot->dq_dqb;
72
73 /* Update from disk only entries not set by the admin */
74 if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
75 m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
76 m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
77 }
78 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
79 m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
80 if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
81 m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
82 m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
83 }
84 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
85 m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
86 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
87 m->dqb_btime = le64_to_cpu(d->dqb_btime);
88 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
89 m->dqb_itime = le64_to_cpu(d->dqb_itime);
90 OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
91}
92
93static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
94{
95 struct ocfs2_global_disk_dqblk *d = dp;
96 struct mem_dqblk *m = &dquot->dq_dqb;
97
Eric W. Biederman4c376dc2012-09-16 03:56:19 -070098 d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
Jan Kara9e33d692008-08-25 19:56:50 +020099 d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
100 d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
101 d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
102 d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
103 d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
104 d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
105 d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
106 d->dqb_btime = cpu_to_le64(m->dqb_btime);
107 d->dqb_itime = cpu_to_le64(m->dqb_itime);
Jan Kara7669f542009-07-22 13:17:18 +0200108 d->dqb_pad1 = d->dqb_pad2 = 0;
Jan Kara9e33d692008-08-25 19:56:50 +0200109}
110
111static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
112{
113 struct ocfs2_global_disk_dqblk *d = dp;
114 struct ocfs2_mem_dqinfo *oinfo =
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700115 sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
Jan Kara9e33d692008-08-25 19:56:50 +0200116
117 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
118 return 0;
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700119
120 return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
121 le32_to_cpu(d->dqb_id)),
122 dquot->dq_id);
Jan Kara9e33d692008-08-25 19:56:50 +0200123}
124
125struct qtree_fmt_operations ocfs2_global_ops = {
126 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
127 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
128 .is_id = ocfs2_global_is_id,
129};
130
Jan Karafb8dd8d2010-03-31 16:25:37 +0200131int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh)
Joel Becker684ef272008-12-02 17:44:05 -0800132{
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700133 struct ocfs2_disk_dqtrailer *dqt =
134 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
Joel Becker684ef272008-12-02 17:44:05 -0800135
Tao Ma1db986a2011-02-23 22:19:12 +0800136 trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr);
Joel Becker684ef272008-12-02 17:44:05 -0800137
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700138 BUG_ON(!buffer_uptodate(bh));
139
140 /*
141 * If the ecc fails, we return the error but otherwise
142 * leave the filesystem running. We know any error is
143 * local to this block.
144 */
145 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
Joel Becker684ef272008-12-02 17:44:05 -0800146}
147
Jan Karaf64dd442010-04-28 00:22:30 +0200148int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
149 struct buffer_head **bhp)
150{
151 int rc;
152
153 *bhp = NULL;
154 rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0,
155 ocfs2_validate_quota_block);
156 if (rc)
157 mlog_errno(rc);
158 return rc;
159}
160
Jan Kara9e33d692008-08-25 19:56:50 +0200161/* Read data from global quotafile - avoid pagecache and such because we cannot
162 * afford acquiring the locks... We use quota cluster lock to serialize
163 * operations. Caller is responsible for acquiring it. */
164ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
165 size_t len, loff_t off)
166{
167 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
168 struct inode *gqinode = oinfo->dqi_gqinode;
169 loff_t i_size = i_size_read(gqinode);
170 int offset = off & (sb->s_blocksize - 1);
171 sector_t blk = off >> sb->s_blocksize_bits;
172 int err = 0;
173 struct buffer_head *bh;
174 size_t toread, tocopy;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200175 u64 pblock = 0, pcount = 0;
Jan Kara9e33d692008-08-25 19:56:50 +0200176
177 if (off > i_size)
178 return 0;
179 if (off + len > i_size)
180 len = i_size - off;
181 toread = len;
182 while (toread > 0) {
Mark Fashehdad7d972008-12-24 16:33:08 -0800183 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200184 if (!pcount) {
185 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
186 &pcount, NULL);
187 if (err) {
188 mlog_errno(err);
189 return err;
190 }
191 } else {
192 pcount--;
193 pblock++;
194 }
Joel Becker85eb8b72008-11-25 15:31:27 +0100195 bh = NULL;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200196 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
Joel Becker85eb8b72008-11-25 15:31:27 +0100197 if (err) {
Jan Kara9e33d692008-08-25 19:56:50 +0200198 mlog_errno(err);
199 return err;
200 }
201 memcpy(data, bh->b_data + offset, tocopy);
202 brelse(bh);
203 offset = 0;
204 toread -= tocopy;
205 data += tocopy;
206 blk++;
207 }
208 return len;
209}
210
211/* Write to quotafile (we know the transaction is already started and has
212 * enough credits) */
213ssize_t ocfs2_quota_write(struct super_block *sb, int type,
214 const char *data, size_t len, loff_t off)
215{
216 struct mem_dqinfo *info = sb_dqinfo(sb, type);
217 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
218 struct inode *gqinode = oinfo->dqi_gqinode;
219 int offset = off & (sb->s_blocksize - 1);
220 sector_t blk = off >> sb->s_blocksize_bits;
Jan Karaaf09e512008-11-25 15:31:28 +0100221 int err = 0, new = 0, ja_type;
Joel Becker85eb8b72008-11-25 15:31:27 +0100222 struct buffer_head *bh = NULL;
Jan Kara9e33d692008-08-25 19:56:50 +0200223 handle_t *handle = journal_current_handle();
Jan Karafb8dd8d2010-03-31 16:25:37 +0200224 u64 pblock, pcount;
Jan Kara9e33d692008-08-25 19:56:50 +0200225
226 if (!handle) {
227 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
228 "because transaction was not started.\n",
229 (unsigned long long)off, (unsigned long long)len);
230 return -EIO;
231 }
232 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
233 WARN_ON(1);
234 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
235 }
236
Jan Kara9e33d692008-08-25 19:56:50 +0200237 if (gqinode->i_size < off + len) {
Jan Karab57ac2c2009-07-22 13:17:15 +0200238 loff_t rounded_end =
239 ocfs2_align_bytes_to_blocks(sb, off + len);
240
Jan Karafb8dd8d2010-03-31 16:25:37 +0200241 /* Space is already allocated in ocfs2_acquire_dquot() */
Jan Kara9e33d692008-08-25 19:56:50 +0200242 err = ocfs2_simple_size_update(gqinode,
243 oinfo->dqi_gqi_bh,
Jan Karab57ac2c2009-07-22 13:17:15 +0200244 rounded_end);
Jan Kara9e33d692008-08-25 19:56:50 +0200245 if (err < 0)
246 goto out;
247 new = 1;
248 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200249 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
250 if (err) {
251 mlog_errno(err);
252 goto out;
253 }
Jan Kara9e33d692008-08-25 19:56:50 +0200254 /* Not rewriting whole block? */
255 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
256 !new) {
Jan Karafb8dd8d2010-03-31 16:25:37 +0200257 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
Jan Karaaf09e512008-11-25 15:31:28 +0100258 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
Jan Kara9e33d692008-08-25 19:56:50 +0200259 } else {
Jan Karafb8dd8d2010-03-31 16:25:37 +0200260 bh = sb_getblk(sb, pblock);
261 if (!bh)
262 err = -ENOMEM;
Jan Karaaf09e512008-11-25 15:31:28 +0100263 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
Jan Kara9e33d692008-08-25 19:56:50 +0200264 }
Jan Karaaf09e512008-11-25 15:31:28 +0100265 if (err) {
266 mlog_errno(err);
Tao Mae9956fa2009-07-30 16:07:10 +0800267 goto out;
Jan Kara9e33d692008-08-25 19:56:50 +0200268 }
269 lock_buffer(bh);
270 if (new)
271 memset(bh->b_data, 0, sb->s_blocksize);
272 memcpy(bh->b_data + offset, data, len);
273 flush_dcache_page(bh->b_page);
Jan Karaaf09e512008-11-25 15:31:28 +0100274 set_buffer_uptodate(bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200275 unlock_buffer(bh);
Joel Becker8cb471e2009-02-10 20:00:41 -0800276 ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh);
Joel Becker0cf2f762009-02-12 16:41:25 -0800277 err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh,
278 ja_type);
Jan Karaaf09e512008-11-25 15:31:28 +0100279 if (err < 0) {
280 brelse(bh);
281 goto out;
282 }
Joel Beckerec20cec2010-03-19 14:13:52 -0700283 ocfs2_journal_dirty(handle, bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200284 brelse(bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200285out:
286 if (err) {
Jan Kara9e33d692008-08-25 19:56:50 +0200287 mlog_errno(err);
288 return err;
289 }
290 gqinode->i_version++;
291 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200292 return len;
293}
294
295int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
296{
297 int status;
298 struct buffer_head *bh = NULL;
299
300 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
301 if (status < 0)
302 return status;
303 spin_lock(&dq_data_lock);
304 if (!oinfo->dqi_gqi_count++)
305 oinfo->dqi_gqi_bh = bh;
306 else
307 WARN_ON(bh != oinfo->dqi_gqi_bh);
308 spin_unlock(&dq_data_lock);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200309 if (ex) {
310 mutex_lock(&oinfo->dqi_gqinode->i_mutex);
311 down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
312 } else {
313 down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
314 }
Jan Kara9e33d692008-08-25 19:56:50 +0200315 return 0;
316}
317
318void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
319{
Jan Karafb8dd8d2010-03-31 16:25:37 +0200320 if (ex) {
321 up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
322 mutex_unlock(&oinfo->dqi_gqinode->i_mutex);
323 } else {
324 up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
325 }
Jan Kara9e33d692008-08-25 19:56:50 +0200326 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
327 brelse(oinfo->dqi_gqi_bh);
328 spin_lock(&dq_data_lock);
329 if (!--oinfo->dqi_gqi_count)
330 oinfo->dqi_gqi_bh = NULL;
331 spin_unlock(&dq_data_lock);
332}
333
334/* Read information header from global quota file */
335int ocfs2_global_read_info(struct super_block *sb, int type)
336{
337 struct inode *gqinode = NULL;
338 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
339 GROUP_QUOTA_SYSTEM_INODE };
340 struct ocfs2_global_disk_dqinfo dinfo;
341 struct mem_dqinfo *info = sb_dqinfo(sb, type);
342 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
Jan Karaae4f6ef2010-04-28 19:04:29 +0200343 u64 pcount;
Jan Kara9e33d692008-08-25 19:56:50 +0200344 int status;
345
Jan Kara9e33d692008-08-25 19:56:50 +0200346 /* Read global header */
347 gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
348 OCFS2_INVALID_SLOT);
349 if (!gqinode) {
350 mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
351 type);
352 status = -EINVAL;
353 goto out_err;
354 }
355 oinfo->dqi_gi.dqi_sb = sb;
356 oinfo->dqi_gi.dqi_type = type;
357 ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
358 oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
359 oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
360 oinfo->dqi_gqi_bh = NULL;
361 oinfo->dqi_gqi_count = 0;
362 oinfo->dqi_gqinode = gqinode;
363 status = ocfs2_lock_global_qf(oinfo, 0);
364 if (status < 0) {
365 mlog_errno(status);
366 goto out_err;
367 }
Jan Karaae4f6ef2010-04-28 19:04:29 +0200368
369 status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk,
370 &pcount, NULL);
371 if (status < 0)
372 goto out_unlock;
373
374 status = ocfs2_qinfo_lock(oinfo, 0);
375 if (status < 0)
376 goto out_unlock;
Jan Kara9e33d692008-08-25 19:56:50 +0200377 status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
378 sizeof(struct ocfs2_global_disk_dqinfo),
379 OCFS2_GLOBAL_INFO_OFF);
Jan Karaae4f6ef2010-04-28 19:04:29 +0200380 ocfs2_qinfo_unlock(oinfo, 0);
Jan Kara9e33d692008-08-25 19:56:50 +0200381 ocfs2_unlock_global_qf(oinfo, 0);
382 if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
383 mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
384 status);
385 if (status >= 0)
386 status = -EIO;
387 mlog_errno(status);
388 goto out_err;
389 }
390 info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
391 info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
392 oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
393 oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
394 oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
395 oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
396 oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
397 oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
398 OCFS2_QBLK_RESERVED_SPACE;
399 oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
Mark Fasheh171bf932008-10-20 15:36:47 +0200400 INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
Tejun Heo316873c2011-02-01 11:42:42 +0100401 schedule_delayed_work(&oinfo->dqi_sync_work,
402 msecs_to_jiffies(oinfo->dqi_syncms));
Mark Fasheh171bf932008-10-20 15:36:47 +0200403
Jan Kara9e33d692008-08-25 19:56:50 +0200404out_err:
Jan Kara9e33d692008-08-25 19:56:50 +0200405 return status;
Jan Karaae4f6ef2010-04-28 19:04:29 +0200406out_unlock:
407 ocfs2_unlock_global_qf(oinfo, 0);
408 mlog_errno(status);
409 goto out_err;
Jan Kara9e33d692008-08-25 19:56:50 +0200410}
411
412/* Write information to global quota file. Expects exlusive lock on quota
413 * file inode and quota info */
414static int __ocfs2_global_write_info(struct super_block *sb, int type)
415{
416 struct mem_dqinfo *info = sb_dqinfo(sb, type);
417 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
418 struct ocfs2_global_disk_dqinfo dinfo;
419 ssize_t size;
420
421 spin_lock(&dq_data_lock);
422 info->dqi_flags &= ~DQF_INFO_DIRTY;
423 dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
424 dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
425 spin_unlock(&dq_data_lock);
426 dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
427 dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
428 dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
429 dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
430 size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
431 sizeof(struct ocfs2_global_disk_dqinfo),
432 OCFS2_GLOBAL_INFO_OFF);
433 if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
434 mlog(ML_ERROR, "Cannot write global quota info structure\n");
435 if (size >= 0)
436 size = -EIO;
437 return size;
438 }
439 return 0;
440}
441
442int ocfs2_global_write_info(struct super_block *sb, int type)
443{
444 int err;
445 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
446
447 err = ocfs2_qinfo_lock(info, 1);
448 if (err < 0)
449 return err;
450 err = __ocfs2_global_write_info(sb, type);
451 ocfs2_qinfo_unlock(info, 1);
452 return err;
453}
454
Jan Karab409d7a2009-08-06 23:29:34 +0200455static int ocfs2_global_qinit_alloc(struct super_block *sb, int type)
456{
457 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
458
459 /*
460 * We may need to allocate tree blocks and a leaf block but not the
461 * root block
462 */
463 return oinfo->dqi_gi.dqi_qtree_depth;
464}
465
466static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type)
467{
Jan Kara832d09c2010-05-11 17:04:14 +0200468 /* We modify all the allocated blocks, tree root, info block and
469 * the inode */
Jan Karab409d7a2009-08-06 23:29:34 +0200470 return (ocfs2_global_qinit_alloc(sb, type) + 2) *
Jan Kara832d09c2010-05-11 17:04:14 +0200471 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1;
Jan Karab409d7a2009-08-06 23:29:34 +0200472}
473
Jan Kara9e33d692008-08-25 19:56:50 +0200474/* Sync local information about quota modifications with global quota file.
475 * Caller must have started the transaction and obtained exclusive lock for
476 * global quota file inode */
477int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
478{
479 int err, err2;
480 struct super_block *sb = dquot->dq_sb;
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700481 int type = dquot->dq_id.type;
Jan Kara9e33d692008-08-25 19:56:50 +0200482 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
483 struct ocfs2_global_disk_dqblk dqblk;
484 s64 spacechange, inodechange;
485 time_t olditime, oldbtime;
486
487 err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
488 sizeof(struct ocfs2_global_disk_dqblk),
489 dquot->dq_off);
490 if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
491 if (err >= 0) {
492 mlog(ML_ERROR, "Short read from global quota file "
493 "(%u read)\n", err);
494 err = -EIO;
495 }
496 goto out;
497 }
498
499 /* Update space and inode usage. Get also other information from
500 * global quota file so that we don't overwrite any changes there.
501 * We are */
502 spin_lock(&dq_data_lock);
503 spacechange = dquot->dq_dqb.dqb_curspace -
504 OCFS2_DQUOT(dquot)->dq_origspace;
505 inodechange = dquot->dq_dqb.dqb_curinodes -
506 OCFS2_DQUOT(dquot)->dq_originodes;
507 olditime = dquot->dq_dqb.dqb_itime;
508 oldbtime = dquot->dq_dqb.dqb_btime;
509 ocfs2_global_disk2memdqb(dquot, &dqblk);
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700510 trace_ocfs2_sync_dquot(from_kqid(&init_user_ns, dquot->dq_id),
511 dquot->dq_dqb.dqb_curspace,
Tao Ma1db986a2011-02-23 22:19:12 +0800512 (long long)spacechange,
513 dquot->dq_dqb.dqb_curinodes,
514 (long long)inodechange);
Jan Kara9e33d692008-08-25 19:56:50 +0200515 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
516 dquot->dq_dqb.dqb_curspace += spacechange;
517 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
518 dquot->dq_dqb.dqb_curinodes += inodechange;
519 /* Set properly space grace time... */
520 if (dquot->dq_dqb.dqb_bsoftlimit &&
521 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
522 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
523 oldbtime > 0) {
524 if (dquot->dq_dqb.dqb_btime > 0)
525 dquot->dq_dqb.dqb_btime =
526 min(dquot->dq_dqb.dqb_btime, oldbtime);
527 else
528 dquot->dq_dqb.dqb_btime = oldbtime;
529 }
530 } else {
531 dquot->dq_dqb.dqb_btime = 0;
532 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
533 }
534 /* Set properly inode grace time... */
535 if (dquot->dq_dqb.dqb_isoftlimit &&
536 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
537 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
538 olditime > 0) {
539 if (dquot->dq_dqb.dqb_itime > 0)
540 dquot->dq_dqb.dqb_itime =
541 min(dquot->dq_dqb.dqb_itime, olditime);
542 else
543 dquot->dq_dqb.dqb_itime = olditime;
544 }
545 } else {
546 dquot->dq_dqb.dqb_itime = 0;
547 clear_bit(DQ_INODES_B, &dquot->dq_flags);
548 }
549 /* All information is properly updated, clear the flags */
550 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
551 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
552 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
553 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
554 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
555 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
556 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
557 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
558 spin_unlock(&dq_data_lock);
559 err = ocfs2_qinfo_lock(info, freeing);
560 if (err < 0) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300561 mlog(ML_ERROR, "Failed to lock quota info, losing quota write"
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700562 " (type=%d, id=%u)\n", dquot->dq_id.type,
563 (unsigned)from_kqid(&init_user_ns, dquot->dq_id));
Jan Kara9e33d692008-08-25 19:56:50 +0200564 goto out;
565 }
566 if (freeing)
567 OCFS2_DQUOT(dquot)->dq_use_count--;
568 err = qtree_write_dquot(&info->dqi_gi, dquot);
569 if (err < 0)
570 goto out_qlock;
571 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
572 err = qtree_release_dquot(&info->dqi_gi, dquot);
573 if (info_dirty(sb_dqinfo(sb, type))) {
574 err2 = __ocfs2_global_write_info(sb, type);
575 if (!err)
576 err = err2;
577 }
578 }
579out_qlock:
580 ocfs2_qinfo_unlock(info, freeing);
581out:
582 if (err < 0)
583 mlog_errno(err);
584 return err;
585}
586
587/*
Mark Fasheh171bf932008-10-20 15:36:47 +0200588 * Functions for periodic syncing of dquots with global file
589 */
590static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
591{
592 handle_t *handle;
593 struct super_block *sb = dquot->dq_sb;
594 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
595 struct ocfs2_super *osb = OCFS2_SB(sb);
596 int status = 0;
597
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700598 trace_ocfs2_sync_dquot_helper(from_kqid(&init_user_ns, dquot->dq_id),
599 dquot->dq_id.type,
Tao Ma1db986a2011-02-23 22:19:12 +0800600 type, sb->s_id);
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700601 if (type != dquot->dq_id.type)
Mark Fasheh171bf932008-10-20 15:36:47 +0200602 goto out;
603 status = ocfs2_lock_global_qf(oinfo, 1);
604 if (status < 0)
605 goto out;
606
607 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
608 if (IS_ERR(handle)) {
609 status = PTR_ERR(handle);
610 mlog_errno(status);
611 goto out_ilock;
612 }
613 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
614 status = ocfs2_sync_dquot(dquot);
Mark Fasheh171bf932008-10-20 15:36:47 +0200615 if (status < 0)
616 mlog_errno(status);
617 /* We have to write local structure as well... */
Jan Kara741e1282010-05-13 18:05:15 +0200618 status = ocfs2_local_write_dquot(dquot);
Mark Fasheh171bf932008-10-20 15:36:47 +0200619 if (status < 0)
620 mlog_errno(status);
Jan Kara741e1282010-05-13 18:05:15 +0200621 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
Mark Fasheh171bf932008-10-20 15:36:47 +0200622 ocfs2_commit_trans(osb, handle);
623out_ilock:
624 ocfs2_unlock_global_qf(oinfo, 1);
625out:
Mark Fasheh171bf932008-10-20 15:36:47 +0200626 return status;
627}
628
629static void qsync_work_fn(struct work_struct *work)
630{
631 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
632 struct ocfs2_mem_dqinfo,
633 dqi_sync_work.work);
634 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
635
636 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
Tejun Heo316873c2011-02-01 11:42:42 +0100637 schedule_delayed_work(&oinfo->dqi_sync_work,
638 msecs_to_jiffies(oinfo->dqi_syncms));
Mark Fasheh171bf932008-10-20 15:36:47 +0200639}
640
641/*
Jan Kara9e33d692008-08-25 19:56:50 +0200642 * Wrappers for generic quota functions
643 */
644
645static int ocfs2_write_dquot(struct dquot *dquot)
646{
647 handle_t *handle;
648 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
649 int status = 0;
650
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700651 trace_ocfs2_write_dquot(from_kqid(&init_user_ns, dquot->dq_id),
652 dquot->dq_id.type);
Jan Kara9e33d692008-08-25 19:56:50 +0200653
654 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
655 if (IS_ERR(handle)) {
656 status = PTR_ERR(handle);
657 mlog_errno(status);
658 goto out;
659 }
Jan Kara741e1282010-05-13 18:05:15 +0200660 mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
661 status = ocfs2_local_write_dquot(dquot);
662 mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200663 ocfs2_commit_trans(osb, handle);
664out:
Jan Kara9e33d692008-08-25 19:56:50 +0200665 return status;
666}
667
Jan Karab409d7a2009-08-06 23:29:34 +0200668static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
Jan Kara9e33d692008-08-25 19:56:50 +0200669{
Jan Karab409d7a2009-08-06 23:29:34 +0200670 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
Jan Kara05849742009-07-22 13:17:21 +0200671 /*
672 * We modify tree, leaf block, global info, local chunk header,
673 * global and local inode; OCFS2_QINFO_WRITE_CREDITS already
674 * accounts for inode update
675 */
Jan Karab409d7a2009-08-06 23:29:34 +0200676 return (oinfo->dqi_gi.dqi_qtree_depth + 2) *
677 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS +
Jan Kara05849742009-07-22 13:17:21 +0200678 OCFS2_QINFO_WRITE_CREDITS +
Jan Kara05849742009-07-22 13:17:21 +0200679 OCFS2_INODE_UPDATE_CREDITS;
Jan Kara9e33d692008-08-25 19:56:50 +0200680}
681
682static int ocfs2_release_dquot(struct dquot *dquot)
683{
684 handle_t *handle;
685 struct ocfs2_mem_dqinfo *oinfo =
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700686 sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
Jan Kara9e33d692008-08-25 19:56:50 +0200687 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
688 int status = 0;
689
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700690 trace_ocfs2_release_dquot(from_kqid(&init_user_ns, dquot->dq_id),
691 dquot->dq_id.type);
Jan Kara9e33d692008-08-25 19:56:50 +0200692
Jan Karafb8dd8d2010-03-31 16:25:37 +0200693 mutex_lock(&dquot->dq_lock);
694 /* Check whether we are not racing with some other dqget() */
695 if (atomic_read(&dquot->dq_count) > 1)
696 goto out;
Jan Kara9e33d692008-08-25 19:56:50 +0200697 status = ocfs2_lock_global_qf(oinfo, 1);
698 if (status < 0)
699 goto out;
700 handle = ocfs2_start_trans(osb,
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700701 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_id.type));
Jan Kara9e33d692008-08-25 19:56:50 +0200702 if (IS_ERR(handle)) {
703 status = PTR_ERR(handle);
704 mlog_errno(status);
705 goto out_ilock;
706 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200707
708 status = ocfs2_global_release_dquot(dquot);
709 if (status < 0) {
710 mlog_errno(status);
711 goto out_trans;
712 }
713 status = ocfs2_local_release_dquot(handle, dquot);
714 /*
715 * If we fail here, we cannot do much as global structure is
716 * already released. So just complain...
717 */
718 if (status < 0)
719 mlog_errno(status);
720 clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
721out_trans:
Jan Kara9e33d692008-08-25 19:56:50 +0200722 ocfs2_commit_trans(osb, handle);
723out_ilock:
724 ocfs2_unlock_global_qf(oinfo, 1);
725out:
Jan Karafb8dd8d2010-03-31 16:25:37 +0200726 mutex_unlock(&dquot->dq_lock);
Tao Mac1e8d352011-03-07 16:43:21 +0800727 if (status)
728 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200729 return status;
730}
731
Jan Karafb8dd8d2010-03-31 16:25:37 +0200732/*
733 * Read global dquot structure from disk or create it if it does
734 * not exist. Also update use count of the global structure and
735 * create structure in node-local quota file.
736 */
Jan Kara9e33d692008-08-25 19:56:50 +0200737static int ocfs2_acquire_dquot(struct dquot *dquot)
738{
Jan Karafb8dd8d2010-03-31 16:25:37 +0200739 int status = 0, err;
740 int ex = 0;
741 struct super_block *sb = dquot->dq_sb;
742 struct ocfs2_super *osb = OCFS2_SB(sb);
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700743 int type = dquot->dq_id.type;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200744 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
745 struct inode *gqinode = info->dqi_gqinode;
746 int need_alloc = ocfs2_global_qinit_alloc(sb, type);
747 handle_t *handle;
Jan Kara9e33d692008-08-25 19:56:50 +0200748
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700749 trace_ocfs2_acquire_dquot(from_kqid(&init_user_ns, dquot->dq_id),
750 type);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200751 mutex_lock(&dquot->dq_lock);
752 /*
753 * We need an exclusive lock, because we're going to update use count
754 * and instantiate possibly new dquot structure
755 */
756 status = ocfs2_lock_global_qf(info, 1);
Jan Kara9e33d692008-08-25 19:56:50 +0200757 if (status < 0)
758 goto out;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200759 if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
760 status = ocfs2_qinfo_lock(info, 0);
761 if (status < 0)
762 goto out_dq;
763 status = qtree_read_dquot(&info->dqi_gi, dquot);
764 ocfs2_qinfo_unlock(info, 0);
765 if (status < 0)
766 goto out_dq;
767 }
768 set_bit(DQ_READ_B, &dquot->dq_flags);
769
770 OCFS2_DQUOT(dquot)->dq_use_count++;
771 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
772 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
773 if (!dquot->dq_off) { /* No real quota entry? */
774 ex = 1;
775 /*
776 * Add blocks to quota file before we start a transaction since
777 * locking allocators ranks above a transaction start
778 */
779 WARN_ON(journal_current_handle());
Joel Becker56934862010-07-01 15:13:31 -0700780 status = ocfs2_extend_no_holes(gqinode, NULL,
Jan Karafb8dd8d2010-03-31 16:25:37 +0200781 gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
782 gqinode->i_size);
783 if (status < 0)
784 goto out_dq;
785 }
786
787 handle = ocfs2_start_trans(osb,
788 ocfs2_calc_global_qinit_credits(sb, type));
789 if (IS_ERR(handle)) {
790 status = PTR_ERR(handle);
791 goto out_dq;
792 }
793 status = ocfs2_qinfo_lock(info, ex);
794 if (status < 0)
795 goto out_trans;
796 status = qtree_write_dquot(&info->dqi_gi, dquot);
797 if (ex && info_dirty(sb_dqinfo(sb, type))) {
798 err = __ocfs2_global_write_info(sb, type);
799 if (!status)
800 status = err;
801 }
802 ocfs2_qinfo_unlock(info, ex);
803out_trans:
804 ocfs2_commit_trans(osb, handle);
805out_dq:
806 ocfs2_unlock_global_qf(info, 1);
807 if (status < 0)
808 goto out;
809
810 status = ocfs2_create_local_dquot(dquot);
811 if (status < 0)
812 goto out;
813 set_bit(DQ_ACTIVE_B, &dquot->dq_flags);
Jan Kara9e33d692008-08-25 19:56:50 +0200814out:
Jan Karafb8dd8d2010-03-31 16:25:37 +0200815 mutex_unlock(&dquot->dq_lock);
Tao Mac1e8d352011-03-07 16:43:21 +0800816 if (status)
817 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200818 return status;
819}
820
821static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
822{
823 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
824 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
825 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
826 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
827 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
828 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
829 int sync = 0;
830 int status;
831 struct super_block *sb = dquot->dq_sb;
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700832 int type = dquot->dq_id.type;
Jan Kara9e33d692008-08-25 19:56:50 +0200833 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
834 handle_t *handle;
835 struct ocfs2_super *osb = OCFS2_SB(sb);
836
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700837 trace_ocfs2_mark_dquot_dirty(from_kqid(&init_user_ns, dquot->dq_id),
838 type);
Jan Kara9e33d692008-08-25 19:56:50 +0200839
840 /* In case user set some limits, sync dquot immediately to global
841 * quota file so that information propagates quicker */
842 spin_lock(&dq_data_lock);
843 if (dquot->dq_flags & mask)
844 sync = 1;
845 spin_unlock(&dq_data_lock);
Jan Karaf8afead2009-01-12 23:20:32 +0100846 /* This is a slight hack but we can't afford getting global quota
847 * lock if we already have a transaction started. */
848 if (!sync || journal_current_handle()) {
Jan Kara9e33d692008-08-25 19:56:50 +0200849 status = ocfs2_write_dquot(dquot);
850 goto out;
851 }
852 status = ocfs2_lock_global_qf(oinfo, 1);
853 if (status < 0)
854 goto out;
855 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
856 if (IS_ERR(handle)) {
857 status = PTR_ERR(handle);
858 mlog_errno(status);
859 goto out_ilock;
860 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200861 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200862 status = ocfs2_sync_dquot(dquot);
863 if (status < 0) {
864 mlog_errno(status);
Jan Kara741e1282010-05-13 18:05:15 +0200865 goto out_dlock;
Jan Kara9e33d692008-08-25 19:56:50 +0200866 }
867 /* Now write updated local dquot structure */
Jan Kara741e1282010-05-13 18:05:15 +0200868 status = ocfs2_local_write_dquot(dquot);
869out_dlock:
870 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200871 ocfs2_commit_trans(osb, handle);
872out_ilock:
873 ocfs2_unlock_global_qf(oinfo, 1);
874out:
Tao Mac1e8d352011-03-07 16:43:21 +0800875 if (status)
876 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200877 return status;
878}
879
880/* This should happen only after set_dqinfo(). */
881static int ocfs2_write_info(struct super_block *sb, int type)
882{
883 handle_t *handle;
884 int status = 0;
885 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
886
Jan Kara9e33d692008-08-25 19:56:50 +0200887 status = ocfs2_lock_global_qf(oinfo, 1);
888 if (status < 0)
889 goto out;
890 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
891 if (IS_ERR(handle)) {
892 status = PTR_ERR(handle);
893 mlog_errno(status);
894 goto out_ilock;
895 }
896 status = dquot_commit_info(sb, type);
897 ocfs2_commit_trans(OCFS2_SB(sb), handle);
898out_ilock:
899 ocfs2_unlock_global_qf(oinfo, 1);
900out:
Tao Mac1e8d352011-03-07 16:43:21 +0800901 if (status)
902 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200903 return status;
904}
905
Jan Kara9e33d692008-08-25 19:56:50 +0200906static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
907{
908 struct ocfs2_dquot *dquot =
909 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
910
911 if (!dquot)
912 return NULL;
913 return &dquot->dq_dquot;
914}
915
916static void ocfs2_destroy_dquot(struct dquot *dquot)
917{
918 kmem_cache_free(ocfs2_dquot_cachep, dquot);
919}
920
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700921const struct dquot_operations ocfs2_quota_operations = {
Jan Kara741e1282010-05-13 18:05:15 +0200922 /* We never make dquot dirty so .write_dquot is never called */
Jan Kara9e33d692008-08-25 19:56:50 +0200923 .acquire_dquot = ocfs2_acquire_dquot,
924 .release_dquot = ocfs2_release_dquot,
925 .mark_dirty = ocfs2_mark_dquot_dirty,
926 .write_info = ocfs2_write_info,
927 .alloc_dquot = ocfs2_alloc_dquot,
928 .destroy_dquot = ocfs2_destroy_dquot,
929};