blob: b990a62cff50c4b6d3bd18f6a5ecede3fe14d440 [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 Karae3a767b2014-04-03 14:46:56 -070013#include <linux/llist.h>
Jan Kara9e33d692008-08-25 19:56:50 +020014
Jan Kara9e33d692008-08-25 19:56:50 +020015#include <cluster/masklog.h>
16
17#include "ocfs2_fs.h"
18#include "ocfs2.h"
19#include "alloc.h"
Joel Beckerd6b32bb2008-10-17 14:55:01 -070020#include "blockcheck.h"
Jan Kara9e33d692008-08-25 19:56:50 +020021#include "inode.h"
22#include "journal.h"
23#include "file.h"
24#include "sysfile.h"
25#include "dlmglue.h"
26#include "uptodate.h"
Jan Karaada50822009-08-03 18:24:21 +020027#include "super.h"
Jan Karaf64dd442010-04-28 00:22:30 +020028#include "buffer_head_io.h"
Jan Kara9e33d692008-08-25 19:56:50 +020029#include "quota.h"
Tao Ma1db986a2011-02-23 22:19:12 +080030#include "ocfs2_trace.h"
Jan Kara9e33d692008-08-25 19:56:50 +020031
Jan Karafb8dd8d2010-03-31 16:25:37 +020032/*
33 * Locking of quotas with OCFS2 is rather complex. Here are rules that
34 * should be obeyed by all the functions:
35 * - any write of quota structure (either to local or global file) is protected
36 * by dqio_mutex or dquot->dq_lock.
37 * - any modification of global quota file holds inode cluster lock, i_mutex,
38 * and ip_alloc_sem of the global quota file (achieved by
39 * ocfs2_lock_global_qf). It also has to hold qinfo_lock.
40 * - an allocation of new blocks for local quota file is protected by
41 * its ip_alloc_sem
42 *
43 * A rough sketch of locking dependencies (lf = local file, gf = global file):
44 * Normal filesystem operation:
45 * start_trans -> dqio_mutex -> write to lf
46 * Syncing of local and global file:
47 * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
48 * write to gf
49 * -> write to lf
50 * Acquire dquot for the first time:
51 * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf
52 * -> alloc space for gf
53 * -> start_trans -> qinfo_lock -> write to gf
54 * -> ip_alloc_sem of lf -> alloc space for lf
55 * -> write to lf
56 * Release last reference to dquot:
57 * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf
58 * -> write to lf
59 * Note that all the above operations also hold the inode cluster lock of lf.
60 * Recovery:
61 * inode cluster lock of recovered lf
62 * -> read bitmaps -> ip_alloc_sem of lf
63 * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
64 * write to gf
65 */
66
Mark Fasheh171bf932008-10-20 15:36:47 +020067static void qsync_work_fn(struct work_struct *work);
68
Jan Kara9e33d692008-08-25 19:56:50 +020069static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
70{
71 struct ocfs2_global_disk_dqblk *d = dp;
72 struct mem_dqblk *m = &dquot->dq_dqb;
73
74 /* Update from disk only entries not set by the admin */
75 if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
76 m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
77 m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
78 }
79 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
80 m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
81 if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
82 m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
83 m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
84 }
85 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
86 m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
87 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
88 m->dqb_btime = le64_to_cpu(d->dqb_btime);
89 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
90 m->dqb_itime = le64_to_cpu(d->dqb_itime);
91 OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
92}
93
94static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
95{
96 struct ocfs2_global_disk_dqblk *d = dp;
97 struct mem_dqblk *m = &dquot->dq_dqb;
98
Eric W. Biederman4c376dc2012-09-16 03:56:19 -070099 d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
Jan Kara9e33d692008-08-25 19:56:50 +0200100 d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
101 d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
102 d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
103 d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
104 d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
105 d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
106 d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
107 d->dqb_btime = cpu_to_le64(m->dqb_btime);
108 d->dqb_itime = cpu_to_le64(m->dqb_itime);
Jan Kara7669f542009-07-22 13:17:18 +0200109 d->dqb_pad1 = d->dqb_pad2 = 0;
Jan Kara9e33d692008-08-25 19:56:50 +0200110}
111
112static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
113{
114 struct ocfs2_global_disk_dqblk *d = dp;
115 struct ocfs2_mem_dqinfo *oinfo =
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700116 sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
Jan Kara9e33d692008-08-25 19:56:50 +0200117
118 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
119 return 0;
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700120
121 return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
122 le32_to_cpu(d->dqb_id)),
123 dquot->dq_id);
Jan Kara9e33d692008-08-25 19:56:50 +0200124}
125
126struct qtree_fmt_operations ocfs2_global_ops = {
127 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
128 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
129 .is_id = ocfs2_global_is_id,
130};
131
Jan Karafb8dd8d2010-03-31 16:25:37 +0200132int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh)
Joel Becker684ef272008-12-02 17:44:05 -0800133{
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700134 struct ocfs2_disk_dqtrailer *dqt =
135 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
Joel Becker684ef272008-12-02 17:44:05 -0800136
Tao Ma1db986a2011-02-23 22:19:12 +0800137 trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr);
Joel Becker684ef272008-12-02 17:44:05 -0800138
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700139 BUG_ON(!buffer_uptodate(bh));
140
141 /*
142 * If the ecc fails, we return the error but otherwise
143 * leave the filesystem running. We know any error is
144 * local to this block.
145 */
146 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
Joel Becker684ef272008-12-02 17:44:05 -0800147}
148
Jan Karaf64dd442010-04-28 00:22:30 +0200149int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
150 struct buffer_head **bhp)
151{
152 int rc;
153
154 *bhp = NULL;
155 rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0,
156 ocfs2_validate_quota_block);
157 if (rc)
158 mlog_errno(rc);
159 return rc;
160}
161
Jan Kara9e33d692008-08-25 19:56:50 +0200162/* Read data from global quotafile - avoid pagecache and such because we cannot
163 * afford acquiring the locks... We use quota cluster lock to serialize
164 * operations. Caller is responsible for acquiring it. */
165ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
166 size_t len, loff_t off)
167{
168 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
169 struct inode *gqinode = oinfo->dqi_gqinode;
170 loff_t i_size = i_size_read(gqinode);
171 int offset = off & (sb->s_blocksize - 1);
172 sector_t blk = off >> sb->s_blocksize_bits;
173 int err = 0;
174 struct buffer_head *bh;
175 size_t toread, tocopy;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200176 u64 pblock = 0, pcount = 0;
Jan Kara9e33d692008-08-25 19:56:50 +0200177
178 if (off > i_size)
179 return 0;
180 if (off + len > i_size)
181 len = i_size - off;
182 toread = len;
183 while (toread > 0) {
Mark Fashehdad7d972008-12-24 16:33:08 -0800184 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200185 if (!pcount) {
186 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
187 &pcount, NULL);
188 if (err) {
189 mlog_errno(err);
190 return err;
191 }
192 } else {
193 pcount--;
194 pblock++;
195 }
Joel Becker85eb8b72008-11-25 15:31:27 +0100196 bh = NULL;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200197 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
Joel Becker85eb8b72008-11-25 15:31:27 +0100198 if (err) {
Jan Kara9e33d692008-08-25 19:56:50 +0200199 mlog_errno(err);
200 return err;
201 }
202 memcpy(data, bh->b_data + offset, tocopy);
203 brelse(bh);
204 offset = 0;
205 toread -= tocopy;
206 data += tocopy;
207 blk++;
208 }
209 return len;
210}
211
212/* Write to quotafile (we know the transaction is already started and has
213 * enough credits) */
214ssize_t ocfs2_quota_write(struct super_block *sb, int type,
215 const char *data, size_t len, loff_t off)
216{
217 struct mem_dqinfo *info = sb_dqinfo(sb, type);
218 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
219 struct inode *gqinode = oinfo->dqi_gqinode;
220 int offset = off & (sb->s_blocksize - 1);
221 sector_t blk = off >> sb->s_blocksize_bits;
Jan Karaaf09e512008-11-25 15:31:28 +0100222 int err = 0, new = 0, ja_type;
Joel Becker85eb8b72008-11-25 15:31:27 +0100223 struct buffer_head *bh = NULL;
Jan Kara9e33d692008-08-25 19:56:50 +0200224 handle_t *handle = journal_current_handle();
Jan Karafb8dd8d2010-03-31 16:25:37 +0200225 u64 pblock, pcount;
Jan Kara9e33d692008-08-25 19:56:50 +0200226
227 if (!handle) {
228 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
229 "because transaction was not started.\n",
230 (unsigned long long)off, (unsigned long long)len);
231 return -EIO;
232 }
233 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
234 WARN_ON(1);
235 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
236 }
237
Junxiao Bif17c20d2013-09-11 14:19:45 -0700238 if (i_size_read(gqinode) < off + len) {
Jan Karab57ac2c2009-07-22 13:17:15 +0200239 loff_t rounded_end =
240 ocfs2_align_bytes_to_blocks(sb, off + len);
241
Jan Karafb8dd8d2010-03-31 16:25:37 +0200242 /* Space is already allocated in ocfs2_acquire_dquot() */
Jan Kara9e33d692008-08-25 19:56:50 +0200243 err = ocfs2_simple_size_update(gqinode,
244 oinfo->dqi_gqi_bh,
Jan Karab57ac2c2009-07-22 13:17:15 +0200245 rounded_end);
Jan Kara9e33d692008-08-25 19:56:50 +0200246 if (err < 0)
247 goto out;
248 new = 1;
249 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200250 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
251 if (err) {
252 mlog_errno(err);
253 goto out;
254 }
Jan Kara9e33d692008-08-25 19:56:50 +0200255 /* Not rewriting whole block? */
256 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
257 !new) {
Jan Karafb8dd8d2010-03-31 16:25:37 +0200258 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
Jan Karaaf09e512008-11-25 15:31:28 +0100259 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
Jan Kara9e33d692008-08-25 19:56:50 +0200260 } else {
Jan Karafb8dd8d2010-03-31 16:25:37 +0200261 bh = sb_getblk(sb, pblock);
262 if (!bh)
263 err = -ENOMEM;
Jan Karaaf09e512008-11-25 15:31:28 +0100264 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
Jan Kara9e33d692008-08-25 19:56:50 +0200265 }
Jan Karaaf09e512008-11-25 15:31:28 +0100266 if (err) {
267 mlog_errno(err);
Tao Mae9956fa2009-07-30 16:07:10 +0800268 goto out;
Jan Kara9e33d692008-08-25 19:56:50 +0200269 }
270 lock_buffer(bh);
271 if (new)
272 memset(bh->b_data, 0, sb->s_blocksize);
273 memcpy(bh->b_data + offset, data, len);
274 flush_dcache_page(bh->b_page);
Jan Karaaf09e512008-11-25 15:31:28 +0100275 set_buffer_uptodate(bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200276 unlock_buffer(bh);
Joel Becker8cb471e2009-02-10 20:00:41 -0800277 ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh);
Joel Becker0cf2f762009-02-12 16:41:25 -0800278 err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh,
279 ja_type);
Jan Karaaf09e512008-11-25 15:31:28 +0100280 if (err < 0) {
281 brelse(bh);
282 goto out;
283 }
Joel Beckerec20cec2010-03-19 14:13:52 -0700284 ocfs2_journal_dirty(handle, bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200285 brelse(bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200286out:
287 if (err) {
Jan Kara9e33d692008-08-25 19:56:50 +0200288 mlog_errno(err);
289 return err;
290 }
291 gqinode->i_version++;
292 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200293 return len;
294}
295
296int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
297{
298 int status;
299 struct buffer_head *bh = NULL;
300
301 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
302 if (status < 0)
303 return status;
304 spin_lock(&dq_data_lock);
305 if (!oinfo->dqi_gqi_count++)
306 oinfo->dqi_gqi_bh = bh;
307 else
308 WARN_ON(bh != oinfo->dqi_gqi_bh);
309 spin_unlock(&dq_data_lock);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200310 if (ex) {
311 mutex_lock(&oinfo->dqi_gqinode->i_mutex);
312 down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
313 } else {
314 down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
315 }
Jan Kara9e33d692008-08-25 19:56:50 +0200316 return 0;
317}
318
319void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
320{
Jan Karafb8dd8d2010-03-31 16:25:37 +0200321 if (ex) {
322 up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
323 mutex_unlock(&oinfo->dqi_gqinode->i_mutex);
324 } else {
325 up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
326 }
Jan Kara9e33d692008-08-25 19:56:50 +0200327 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
328 brelse(oinfo->dqi_gqi_bh);
329 spin_lock(&dq_data_lock);
330 if (!--oinfo->dqi_gqi_count)
331 oinfo->dqi_gqi_bh = NULL;
332 spin_unlock(&dq_data_lock);
333}
334
335/* Read information header from global quota file */
336int ocfs2_global_read_info(struct super_block *sb, int type)
337{
338 struct inode *gqinode = NULL;
339 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
340 GROUP_QUOTA_SYSTEM_INODE };
341 struct ocfs2_global_disk_dqinfo dinfo;
342 struct mem_dqinfo *info = sb_dqinfo(sb, type);
343 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
Jan Karaae4f6ef2010-04-28 19:04:29 +0200344 u64 pcount;
Jan Kara9e33d692008-08-25 19:56:50 +0200345 int status;
346
Jan Kara9e33d692008-08-25 19:56:50 +0200347 /* Read global header */
348 gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
349 OCFS2_INVALID_SLOT);
350 if (!gqinode) {
351 mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
352 type);
353 status = -EINVAL;
354 goto out_err;
355 }
356 oinfo->dqi_gi.dqi_sb = sb;
357 oinfo->dqi_gi.dqi_type = type;
358 ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
359 oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
360 oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
361 oinfo->dqi_gqi_bh = NULL;
362 oinfo->dqi_gqi_count = 0;
363 oinfo->dqi_gqinode = gqinode;
364 status = ocfs2_lock_global_qf(oinfo, 0);
365 if (status < 0) {
366 mlog_errno(status);
367 goto out_err;
368 }
Jan Karaae4f6ef2010-04-28 19:04:29 +0200369
370 status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk,
371 &pcount, NULL);
372 if (status < 0)
373 goto out_unlock;
374
375 status = ocfs2_qinfo_lock(oinfo, 0);
376 if (status < 0)
377 goto out_unlock;
Jan Kara9e33d692008-08-25 19:56:50 +0200378 status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
379 sizeof(struct ocfs2_global_disk_dqinfo),
380 OCFS2_GLOBAL_INFO_OFF);
Jan Karaae4f6ef2010-04-28 19:04:29 +0200381 ocfs2_qinfo_unlock(oinfo, 0);
Jan Kara9e33d692008-08-25 19:56:50 +0200382 ocfs2_unlock_global_qf(oinfo, 0);
383 if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
384 mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
385 status);
386 if (status >= 0)
387 status = -EIO;
388 mlog_errno(status);
389 goto out_err;
390 }
391 info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
392 info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
393 oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
394 oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
395 oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
396 oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
397 oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
398 oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
399 OCFS2_QBLK_RESERVED_SPACE;
400 oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
Mark Fasheh171bf932008-10-20 15:36:47 +0200401 INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
Tejun Heo316873c2011-02-01 11:42:42 +0100402 schedule_delayed_work(&oinfo->dqi_sync_work,
403 msecs_to_jiffies(oinfo->dqi_syncms));
Mark Fasheh171bf932008-10-20 15:36:47 +0200404
Jan Kara9e33d692008-08-25 19:56:50 +0200405out_err:
Jan Kara9e33d692008-08-25 19:56:50 +0200406 return status;
Jan Karaae4f6ef2010-04-28 19:04:29 +0200407out_unlock:
408 ocfs2_unlock_global_qf(oinfo, 0);
409 mlog_errno(status);
410 goto out_err;
Jan Kara9e33d692008-08-25 19:56:50 +0200411}
412
413/* Write information to global quota file. Expects exlusive lock on quota
414 * file inode and quota info */
415static int __ocfs2_global_write_info(struct super_block *sb, int type)
416{
417 struct mem_dqinfo *info = sb_dqinfo(sb, type);
418 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
419 struct ocfs2_global_disk_dqinfo dinfo;
420 ssize_t size;
421
422 spin_lock(&dq_data_lock);
423 info->dqi_flags &= ~DQF_INFO_DIRTY;
424 dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
425 dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
426 spin_unlock(&dq_data_lock);
427 dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
428 dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
429 dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
430 dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
431 size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
432 sizeof(struct ocfs2_global_disk_dqinfo),
433 OCFS2_GLOBAL_INFO_OFF);
434 if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
435 mlog(ML_ERROR, "Cannot write global quota info structure\n");
436 if (size >= 0)
437 size = -EIO;
438 return size;
439 }
440 return 0;
441}
442
443int ocfs2_global_write_info(struct super_block *sb, int type)
444{
445 int err;
446 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
447
448 err = ocfs2_qinfo_lock(info, 1);
449 if (err < 0)
450 return err;
451 err = __ocfs2_global_write_info(sb, type);
452 ocfs2_qinfo_unlock(info, 1);
453 return err;
454}
455
Jan Karab409d7a2009-08-06 23:29:34 +0200456static int ocfs2_global_qinit_alloc(struct super_block *sb, int type)
457{
458 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
459
460 /*
461 * We may need to allocate tree blocks and a leaf block but not the
462 * root block
463 */
464 return oinfo->dqi_gi.dqi_qtree_depth;
465}
466
467static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type)
468{
Jan Kara832d09c2010-05-11 17:04:14 +0200469 /* We modify all the allocated blocks, tree root, info block and
470 * the inode */
Jan Karab409d7a2009-08-06 23:29:34 +0200471 return (ocfs2_global_qinit_alloc(sb, type) + 2) *
Jan Kara832d09c2010-05-11 17:04:14 +0200472 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1;
Jan Karab409d7a2009-08-06 23:29:34 +0200473}
474
Jan Kara9e33d692008-08-25 19:56:50 +0200475/* Sync local information about quota modifications with global quota file.
476 * Caller must have started the transaction and obtained exclusive lock for
477 * global quota file inode */
478int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
479{
480 int err, err2;
481 struct super_block *sb = dquot->dq_sb;
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700482 int type = dquot->dq_id.type;
Jan Kara9e33d692008-08-25 19:56:50 +0200483 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
484 struct ocfs2_global_disk_dqblk dqblk;
485 s64 spacechange, inodechange;
486 time_t olditime, oldbtime;
487
488 err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
489 sizeof(struct ocfs2_global_disk_dqblk),
490 dquot->dq_off);
491 if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
492 if (err >= 0) {
493 mlog(ML_ERROR, "Short read from global quota file "
494 "(%u read)\n", err);
495 err = -EIO;
496 }
497 goto out;
498 }
499
500 /* Update space and inode usage. Get also other information from
501 * global quota file so that we don't overwrite any changes there.
502 * We are */
503 spin_lock(&dq_data_lock);
504 spacechange = dquot->dq_dqb.dqb_curspace -
505 OCFS2_DQUOT(dquot)->dq_origspace;
506 inodechange = dquot->dq_dqb.dqb_curinodes -
507 OCFS2_DQUOT(dquot)->dq_originodes;
508 olditime = dquot->dq_dqb.dqb_itime;
509 oldbtime = dquot->dq_dqb.dqb_btime;
510 ocfs2_global_disk2memdqb(dquot, &dqblk);
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700511 trace_ocfs2_sync_dquot(from_kqid(&init_user_ns, dquot->dq_id),
512 dquot->dq_dqb.dqb_curspace,
Tao Ma1db986a2011-02-23 22:19:12 +0800513 (long long)spacechange,
514 dquot->dq_dqb.dqb_curinodes,
515 (long long)inodechange);
Jan Kara9e33d692008-08-25 19:56:50 +0200516 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
517 dquot->dq_dqb.dqb_curspace += spacechange;
518 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
519 dquot->dq_dqb.dqb_curinodes += inodechange;
520 /* Set properly space grace time... */
521 if (dquot->dq_dqb.dqb_bsoftlimit &&
522 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
523 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
524 oldbtime > 0) {
525 if (dquot->dq_dqb.dqb_btime > 0)
526 dquot->dq_dqb.dqb_btime =
527 min(dquot->dq_dqb.dqb_btime, oldbtime);
528 else
529 dquot->dq_dqb.dqb_btime = oldbtime;
530 }
531 } else {
532 dquot->dq_dqb.dqb_btime = 0;
533 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
534 }
535 /* Set properly inode grace time... */
536 if (dquot->dq_dqb.dqb_isoftlimit &&
537 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
538 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
539 olditime > 0) {
540 if (dquot->dq_dqb.dqb_itime > 0)
541 dquot->dq_dqb.dqb_itime =
542 min(dquot->dq_dqb.dqb_itime, olditime);
543 else
544 dquot->dq_dqb.dqb_itime = olditime;
545 }
546 } else {
547 dquot->dq_dqb.dqb_itime = 0;
548 clear_bit(DQ_INODES_B, &dquot->dq_flags);
549 }
550 /* All information is properly updated, clear the flags */
551 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
552 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
553 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
554 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
555 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
556 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
557 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
558 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
559 spin_unlock(&dq_data_lock);
560 err = ocfs2_qinfo_lock(info, freeing);
561 if (err < 0) {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300562 mlog(ML_ERROR, "Failed to lock quota info, losing quota write"
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700563 " (type=%d, id=%u)\n", dquot->dq_id.type,
564 (unsigned)from_kqid(&init_user_ns, dquot->dq_id));
Jan Kara9e33d692008-08-25 19:56:50 +0200565 goto out;
566 }
567 if (freeing)
568 OCFS2_DQUOT(dquot)->dq_use_count--;
569 err = qtree_write_dquot(&info->dqi_gi, dquot);
570 if (err < 0)
571 goto out_qlock;
572 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
573 err = qtree_release_dquot(&info->dqi_gi, dquot);
574 if (info_dirty(sb_dqinfo(sb, type))) {
575 err2 = __ocfs2_global_write_info(sb, type);
576 if (!err)
577 err = err2;
578 }
579 }
580out_qlock:
581 ocfs2_qinfo_unlock(info, freeing);
582out:
583 if (err < 0)
584 mlog_errno(err);
585 return err;
586}
587
588/*
Mark Fasheh171bf932008-10-20 15:36:47 +0200589 * Functions for periodic syncing of dquots with global file
590 */
591static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
592{
593 handle_t *handle;
594 struct super_block *sb = dquot->dq_sb;
595 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
596 struct ocfs2_super *osb = OCFS2_SB(sb);
597 int status = 0;
598
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700599 trace_ocfs2_sync_dquot_helper(from_kqid(&init_user_ns, dquot->dq_id),
600 dquot->dq_id.type,
Tao Ma1db986a2011-02-23 22:19:12 +0800601 type, sb->s_id);
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700602 if (type != dquot->dq_id.type)
Mark Fasheh171bf932008-10-20 15:36:47 +0200603 goto out;
604 status = ocfs2_lock_global_qf(oinfo, 1);
605 if (status < 0)
606 goto out;
607
608 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
609 if (IS_ERR(handle)) {
610 status = PTR_ERR(handle);
611 mlog_errno(status);
612 goto out_ilock;
613 }
614 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
615 status = ocfs2_sync_dquot(dquot);
Mark Fasheh171bf932008-10-20 15:36:47 +0200616 if (status < 0)
617 mlog_errno(status);
618 /* We have to write local structure as well... */
Jan Kara741e1282010-05-13 18:05:15 +0200619 status = ocfs2_local_write_dquot(dquot);
Mark Fasheh171bf932008-10-20 15:36:47 +0200620 if (status < 0)
621 mlog_errno(status);
Jan Kara741e1282010-05-13 18:05:15 +0200622 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
Mark Fasheh171bf932008-10-20 15:36:47 +0200623 ocfs2_commit_trans(osb, handle);
624out_ilock:
625 ocfs2_unlock_global_qf(oinfo, 1);
626out:
Mark Fasheh171bf932008-10-20 15:36:47 +0200627 return status;
628}
629
630static void qsync_work_fn(struct work_struct *work)
631{
632 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
633 struct ocfs2_mem_dqinfo,
634 dqi_sync_work.work);
635 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
636
637 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
Tejun Heo316873c2011-02-01 11:42:42 +0100638 schedule_delayed_work(&oinfo->dqi_sync_work,
639 msecs_to_jiffies(oinfo->dqi_syncms));
Mark Fasheh171bf932008-10-20 15:36:47 +0200640}
641
642/*
Jan Kara9e33d692008-08-25 19:56:50 +0200643 * Wrappers for generic quota functions
644 */
645
646static int ocfs2_write_dquot(struct dquot *dquot)
647{
648 handle_t *handle;
649 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
650 int status = 0;
651
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700652 trace_ocfs2_write_dquot(from_kqid(&init_user_ns, dquot->dq_id),
653 dquot->dq_id.type);
Jan Kara9e33d692008-08-25 19:56:50 +0200654
655 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
656 if (IS_ERR(handle)) {
657 status = PTR_ERR(handle);
658 mlog_errno(status);
659 goto out;
660 }
Jan Kara741e1282010-05-13 18:05:15 +0200661 mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
662 status = ocfs2_local_write_dquot(dquot);
663 mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200664 ocfs2_commit_trans(osb, handle);
665out:
Jan Kara9e33d692008-08-25 19:56:50 +0200666 return status;
667}
668
Jan Karab409d7a2009-08-06 23:29:34 +0200669static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
Jan Kara9e33d692008-08-25 19:56:50 +0200670{
Jan Karab409d7a2009-08-06 23:29:34 +0200671 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
Jan Kara05849742009-07-22 13:17:21 +0200672 /*
673 * We modify tree, leaf block, global info, local chunk header,
674 * global and local inode; OCFS2_QINFO_WRITE_CREDITS already
675 * accounts for inode update
676 */
Jan Karab409d7a2009-08-06 23:29:34 +0200677 return (oinfo->dqi_gi.dqi_qtree_depth + 2) *
678 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS +
Jan Kara05849742009-07-22 13:17:21 +0200679 OCFS2_QINFO_WRITE_CREDITS +
Jan Kara05849742009-07-22 13:17:21 +0200680 OCFS2_INODE_UPDATE_CREDITS;
Jan Kara9e33d692008-08-25 19:56:50 +0200681}
682
Jan Karae3a767b2014-04-03 14:46:56 -0700683void ocfs2_drop_dquot_refs(struct work_struct *work)
684{
685 struct ocfs2_super *osb = container_of(work, struct ocfs2_super,
686 dquot_drop_work);
687 struct llist_node *list;
688 struct ocfs2_dquot *odquot, *next_odquot;
689
690 list = llist_del_all(&osb->dquot_drop_list);
691 llist_for_each_entry_safe(odquot, next_odquot, list, list) {
692 /* Drop the reference we acquired in ocfs2_dquot_release() */
693 dqput(&odquot->dq_dquot);
694 }
695}
696
697/*
698 * Called when the last reference to dquot is dropped. If we are called from
699 * downconvert thread, we cannot do all the handling here because grabbing
700 * quota lock could deadlock (the node holding the quota lock could need some
701 * other cluster lock to proceed but with blocked downconvert thread we cannot
702 * release any lock).
703 */
Jan Kara9e33d692008-08-25 19:56:50 +0200704static int ocfs2_release_dquot(struct dquot *dquot)
705{
706 handle_t *handle;
707 struct ocfs2_mem_dqinfo *oinfo =
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700708 sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
Jan Kara9e33d692008-08-25 19:56:50 +0200709 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
710 int status = 0;
711
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700712 trace_ocfs2_release_dquot(from_kqid(&init_user_ns, dquot->dq_id),
713 dquot->dq_id.type);
Jan Kara9e33d692008-08-25 19:56:50 +0200714
Jan Karafb8dd8d2010-03-31 16:25:37 +0200715 mutex_lock(&dquot->dq_lock);
716 /* Check whether we are not racing with some other dqget() */
717 if (atomic_read(&dquot->dq_count) > 1)
718 goto out;
Jan Karae3a767b2014-04-03 14:46:56 -0700719 /* Running from downconvert thread? Postpone quota processing to wq */
720 if (current == osb->dc_task) {
721 /*
722 * Grab our own reference to dquot and queue it for delayed
723 * dropping. Quota code rechecks after calling
724 * ->release_dquot() and won't free dquot structure.
725 */
726 dqgrab(dquot);
727 /* First entry on list -> queue work */
728 if (llist_add(&OCFS2_DQUOT(dquot)->list, &osb->dquot_drop_list))
729 queue_work(ocfs2_wq, &osb->dquot_drop_work);
730 goto out;
731 }
Jan Kara9e33d692008-08-25 19:56:50 +0200732 status = ocfs2_lock_global_qf(oinfo, 1);
733 if (status < 0)
734 goto out;
735 handle = ocfs2_start_trans(osb,
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700736 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_id.type));
Jan Kara9e33d692008-08-25 19:56:50 +0200737 if (IS_ERR(handle)) {
738 status = PTR_ERR(handle);
739 mlog_errno(status);
740 goto out_ilock;
741 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200742
743 status = ocfs2_global_release_dquot(dquot);
744 if (status < 0) {
745 mlog_errno(status);
746 goto out_trans;
747 }
748 status = ocfs2_local_release_dquot(handle, dquot);
749 /*
750 * If we fail here, we cannot do much as global structure is
751 * already released. So just complain...
752 */
753 if (status < 0)
754 mlog_errno(status);
Jan Kara15c34a72014-03-03 15:38:32 -0800755 /*
756 * Clear dq_off so that we search for the structure in quota file next
757 * time we acquire it. The structure might be deleted and reallocated
758 * elsewhere by another node while our dquot structure is on freelist.
759 */
760 dquot->dq_off = 0;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200761 clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
762out_trans:
Jan Kara9e33d692008-08-25 19:56:50 +0200763 ocfs2_commit_trans(osb, handle);
764out_ilock:
765 ocfs2_unlock_global_qf(oinfo, 1);
766out:
Jan Karafb8dd8d2010-03-31 16:25:37 +0200767 mutex_unlock(&dquot->dq_lock);
Tao Mac1e8d352011-03-07 16:43:21 +0800768 if (status)
769 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200770 return status;
771}
772
Jan Karafb8dd8d2010-03-31 16:25:37 +0200773/*
774 * Read global dquot structure from disk or create it if it does
775 * not exist. Also update use count of the global structure and
776 * create structure in node-local quota file.
777 */
Jan Kara9e33d692008-08-25 19:56:50 +0200778static int ocfs2_acquire_dquot(struct dquot *dquot)
779{
Jan Karafb8dd8d2010-03-31 16:25:37 +0200780 int status = 0, err;
781 int ex = 0;
782 struct super_block *sb = dquot->dq_sb;
783 struct ocfs2_super *osb = OCFS2_SB(sb);
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700784 int type = dquot->dq_id.type;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200785 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
786 struct inode *gqinode = info->dqi_gqinode;
787 int need_alloc = ocfs2_global_qinit_alloc(sb, type);
788 handle_t *handle;
Jan Kara9e33d692008-08-25 19:56:50 +0200789
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700790 trace_ocfs2_acquire_dquot(from_kqid(&init_user_ns, dquot->dq_id),
791 type);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200792 mutex_lock(&dquot->dq_lock);
793 /*
794 * We need an exclusive lock, because we're going to update use count
795 * and instantiate possibly new dquot structure
796 */
797 status = ocfs2_lock_global_qf(info, 1);
Jan Kara9e33d692008-08-25 19:56:50 +0200798 if (status < 0)
799 goto out;
Jan Kara15c34a72014-03-03 15:38:32 -0800800 status = ocfs2_qinfo_lock(info, 0);
801 if (status < 0)
802 goto out_dq;
803 /*
804 * We always want to read dquot structure from disk because we don't
805 * know what happened with it while it was on freelist.
806 */
807 status = qtree_read_dquot(&info->dqi_gi, dquot);
808 ocfs2_qinfo_unlock(info, 0);
809 if (status < 0)
810 goto out_dq;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200811
812 OCFS2_DQUOT(dquot)->dq_use_count++;
813 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
814 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
815 if (!dquot->dq_off) { /* No real quota entry? */
816 ex = 1;
817 /*
818 * Add blocks to quota file before we start a transaction since
819 * locking allocators ranks above a transaction start
820 */
821 WARN_ON(journal_current_handle());
Joel Becker56934862010-07-01 15:13:31 -0700822 status = ocfs2_extend_no_holes(gqinode, NULL,
Junxiao Bif17c20d2013-09-11 14:19:45 -0700823 i_size_read(gqinode) + (need_alloc << sb->s_blocksize_bits),
824 i_size_read(gqinode));
Jan Karafb8dd8d2010-03-31 16:25:37 +0200825 if (status < 0)
826 goto out_dq;
827 }
828
829 handle = ocfs2_start_trans(osb,
830 ocfs2_calc_global_qinit_credits(sb, type));
831 if (IS_ERR(handle)) {
832 status = PTR_ERR(handle);
833 goto out_dq;
834 }
835 status = ocfs2_qinfo_lock(info, ex);
836 if (status < 0)
837 goto out_trans;
838 status = qtree_write_dquot(&info->dqi_gi, dquot);
839 if (ex && info_dirty(sb_dqinfo(sb, type))) {
840 err = __ocfs2_global_write_info(sb, type);
841 if (!status)
842 status = err;
843 }
844 ocfs2_qinfo_unlock(info, ex);
845out_trans:
846 ocfs2_commit_trans(osb, handle);
847out_dq:
848 ocfs2_unlock_global_qf(info, 1);
849 if (status < 0)
850 goto out;
851
852 status = ocfs2_create_local_dquot(dquot);
853 if (status < 0)
854 goto out;
855 set_bit(DQ_ACTIVE_B, &dquot->dq_flags);
Jan Kara9e33d692008-08-25 19:56:50 +0200856out:
Jan Karafb8dd8d2010-03-31 16:25:37 +0200857 mutex_unlock(&dquot->dq_lock);
Tao Mac1e8d352011-03-07 16:43:21 +0800858 if (status)
859 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200860 return status;
861}
862
863static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
864{
865 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
866 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
867 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
868 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
869 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
870 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
871 int sync = 0;
872 int status;
873 struct super_block *sb = dquot->dq_sb;
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700874 int type = dquot->dq_id.type;
Jan Kara9e33d692008-08-25 19:56:50 +0200875 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
876 handle_t *handle;
877 struct ocfs2_super *osb = OCFS2_SB(sb);
878
Eric W. Biederman4c376dc2012-09-16 03:56:19 -0700879 trace_ocfs2_mark_dquot_dirty(from_kqid(&init_user_ns, dquot->dq_id),
880 type);
Jan Kara9e33d692008-08-25 19:56:50 +0200881
882 /* In case user set some limits, sync dquot immediately to global
883 * quota file so that information propagates quicker */
884 spin_lock(&dq_data_lock);
885 if (dquot->dq_flags & mask)
886 sync = 1;
887 spin_unlock(&dq_data_lock);
Jan Karaf8afead2009-01-12 23:20:32 +0100888 /* This is a slight hack but we can't afford getting global quota
889 * lock if we already have a transaction started. */
890 if (!sync || journal_current_handle()) {
Jan Kara9e33d692008-08-25 19:56:50 +0200891 status = ocfs2_write_dquot(dquot);
892 goto out;
893 }
894 status = ocfs2_lock_global_qf(oinfo, 1);
895 if (status < 0)
896 goto out;
897 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
898 if (IS_ERR(handle)) {
899 status = PTR_ERR(handle);
900 mlog_errno(status);
901 goto out_ilock;
902 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200903 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200904 status = ocfs2_sync_dquot(dquot);
905 if (status < 0) {
906 mlog_errno(status);
Jan Kara741e1282010-05-13 18:05:15 +0200907 goto out_dlock;
Jan Kara9e33d692008-08-25 19:56:50 +0200908 }
909 /* Now write updated local dquot structure */
Jan Kara741e1282010-05-13 18:05:15 +0200910 status = ocfs2_local_write_dquot(dquot);
911out_dlock:
912 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200913 ocfs2_commit_trans(osb, handle);
914out_ilock:
915 ocfs2_unlock_global_qf(oinfo, 1);
916out:
Tao Mac1e8d352011-03-07 16:43:21 +0800917 if (status)
918 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200919 return status;
920}
921
922/* This should happen only after set_dqinfo(). */
923static int ocfs2_write_info(struct super_block *sb, int type)
924{
925 handle_t *handle;
926 int status = 0;
927 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
928
Jan Kara9e33d692008-08-25 19:56:50 +0200929 status = ocfs2_lock_global_qf(oinfo, 1);
930 if (status < 0)
931 goto out;
932 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
933 if (IS_ERR(handle)) {
934 status = PTR_ERR(handle);
935 mlog_errno(status);
936 goto out_ilock;
937 }
938 status = dquot_commit_info(sb, type);
939 ocfs2_commit_trans(OCFS2_SB(sb), handle);
940out_ilock:
941 ocfs2_unlock_global_qf(oinfo, 1);
942out:
Tao Mac1e8d352011-03-07 16:43:21 +0800943 if (status)
944 mlog_errno(status);
Jan Kara9e33d692008-08-25 19:56:50 +0200945 return status;
946}
947
Jan Kara9e33d692008-08-25 19:56:50 +0200948static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
949{
950 struct ocfs2_dquot *dquot =
951 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
952
953 if (!dquot)
954 return NULL;
955 return &dquot->dq_dquot;
956}
957
958static void ocfs2_destroy_dquot(struct dquot *dquot)
959{
960 kmem_cache_free(ocfs2_dquot_cachep, dquot);
961}
962
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700963const struct dquot_operations ocfs2_quota_operations = {
Jan Kara741e1282010-05-13 18:05:15 +0200964 /* We never make dquot dirty so .write_dquot is never called */
Jan Kara9e33d692008-08-25 19:56:50 +0200965 .acquire_dquot = ocfs2_acquire_dquot,
966 .release_dquot = ocfs2_release_dquot,
967 .mark_dirty = ocfs2_mark_dquot_dirty,
968 .write_info = ocfs2_write_info,
969 .alloc_dquot = ocfs2_alloc_dquot,
970 .destroy_dquot = ocfs2_destroy_dquot,
971};