blob: a73f641664818e2a6c93d30d192b3a70303fecee [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
14#define MLOG_MASK_PREFIX ML_QUOTA
15#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"
30
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
98 d->dqb_id = cpu_to_le32(dquot->dq_id);
99 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 =
115 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
116
117 if (qtree_entry_unused(&oinfo->dqi_gi, dp))
118 return 0;
119 return le32_to_cpu(d->dqb_id) == dquot->dq_id;
120}
121
122struct qtree_fmt_operations ocfs2_global_ops = {
123 .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
124 .disk2mem_dqblk = ocfs2_global_disk2memdqb,
125 .is_id = ocfs2_global_is_id,
126};
127
Jan Karafb8dd8d2010-03-31 16:25:37 +0200128int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh)
Joel Becker684ef272008-12-02 17:44:05 -0800129{
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700130 struct ocfs2_disk_dqtrailer *dqt =
131 ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
Joel Becker684ef272008-12-02 17:44:05 -0800132
133 mlog(0, "Validating quota block %llu\n",
134 (unsigned long long)bh->b_blocknr);
135
Joel Beckerd6b32bb2008-10-17 14:55:01 -0700136 BUG_ON(!buffer_uptodate(bh));
137
138 /*
139 * If the ecc fails, we return the error but otherwise
140 * leave the filesystem running. We know any error is
141 * local to this block.
142 */
143 return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
Joel Becker684ef272008-12-02 17:44:05 -0800144}
145
Jan Karaf64dd442010-04-28 00:22:30 +0200146int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
147 struct buffer_head **bhp)
148{
149 int rc;
150
151 *bhp = NULL;
152 rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0,
153 ocfs2_validate_quota_block);
154 if (rc)
155 mlog_errno(rc);
156 return rc;
157}
158
Jan Kara9e33d692008-08-25 19:56:50 +0200159/* Read data from global quotafile - avoid pagecache and such because we cannot
160 * afford acquiring the locks... We use quota cluster lock to serialize
161 * operations. Caller is responsible for acquiring it. */
162ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
163 size_t len, loff_t off)
164{
165 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
166 struct inode *gqinode = oinfo->dqi_gqinode;
167 loff_t i_size = i_size_read(gqinode);
168 int offset = off & (sb->s_blocksize - 1);
169 sector_t blk = off >> sb->s_blocksize_bits;
170 int err = 0;
171 struct buffer_head *bh;
172 size_t toread, tocopy;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200173 u64 pblock = 0, pcount = 0;
Jan Kara9e33d692008-08-25 19:56:50 +0200174
175 if (off > i_size)
176 return 0;
177 if (off + len > i_size)
178 len = i_size - off;
179 toread = len;
180 while (toread > 0) {
Mark Fashehdad7d972008-12-24 16:33:08 -0800181 tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200182 if (!pcount) {
183 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
184 &pcount, NULL);
185 if (err) {
186 mlog_errno(err);
187 return err;
188 }
189 } else {
190 pcount--;
191 pblock++;
192 }
Joel Becker85eb8b72008-11-25 15:31:27 +0100193 bh = NULL;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200194 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
Joel Becker85eb8b72008-11-25 15:31:27 +0100195 if (err) {
Jan Kara9e33d692008-08-25 19:56:50 +0200196 mlog_errno(err);
197 return err;
198 }
199 memcpy(data, bh->b_data + offset, tocopy);
200 brelse(bh);
201 offset = 0;
202 toread -= tocopy;
203 data += tocopy;
204 blk++;
205 }
206 return len;
207}
208
209/* Write to quotafile (we know the transaction is already started and has
210 * enough credits) */
211ssize_t ocfs2_quota_write(struct super_block *sb, int type,
212 const char *data, size_t len, loff_t off)
213{
214 struct mem_dqinfo *info = sb_dqinfo(sb, type);
215 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
216 struct inode *gqinode = oinfo->dqi_gqinode;
217 int offset = off & (sb->s_blocksize - 1);
218 sector_t blk = off >> sb->s_blocksize_bits;
Jan Karaaf09e512008-11-25 15:31:28 +0100219 int err = 0, new = 0, ja_type;
Joel Becker85eb8b72008-11-25 15:31:27 +0100220 struct buffer_head *bh = NULL;
Jan Kara9e33d692008-08-25 19:56:50 +0200221 handle_t *handle = journal_current_handle();
Jan Karafb8dd8d2010-03-31 16:25:37 +0200222 u64 pblock, pcount;
Jan Kara9e33d692008-08-25 19:56:50 +0200223
224 if (!handle) {
225 mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
226 "because transaction was not started.\n",
227 (unsigned long long)off, (unsigned long long)len);
228 return -EIO;
229 }
230 if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
231 WARN_ON(1);
232 len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
233 }
234
Jan Kara9e33d692008-08-25 19:56:50 +0200235 if (gqinode->i_size < off + len) {
Jan Karab57ac2c2009-07-22 13:17:15 +0200236 loff_t rounded_end =
237 ocfs2_align_bytes_to_blocks(sb, off + len);
238
Jan Karafb8dd8d2010-03-31 16:25:37 +0200239 /* Space is already allocated in ocfs2_acquire_dquot() */
Jan Kara9e33d692008-08-25 19:56:50 +0200240 err = ocfs2_simple_size_update(gqinode,
241 oinfo->dqi_gqi_bh,
Jan Karab57ac2c2009-07-22 13:17:15 +0200242 rounded_end);
Jan Kara9e33d692008-08-25 19:56:50 +0200243 if (err < 0)
244 goto out;
245 new = 1;
246 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200247 err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
248 if (err) {
249 mlog_errno(err);
250 goto out;
251 }
Jan Kara9e33d692008-08-25 19:56:50 +0200252 /* Not rewriting whole block? */
253 if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
254 !new) {
Jan Karafb8dd8d2010-03-31 16:25:37 +0200255 err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
Jan Karaaf09e512008-11-25 15:31:28 +0100256 ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
Jan Kara9e33d692008-08-25 19:56:50 +0200257 } else {
Jan Karafb8dd8d2010-03-31 16:25:37 +0200258 bh = sb_getblk(sb, pblock);
259 if (!bh)
260 err = -ENOMEM;
Jan Karaaf09e512008-11-25 15:31:28 +0100261 ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
Jan Kara9e33d692008-08-25 19:56:50 +0200262 }
Jan Karaaf09e512008-11-25 15:31:28 +0100263 if (err) {
264 mlog_errno(err);
Tao Mae9956fa2009-07-30 16:07:10 +0800265 goto out;
Jan Kara9e33d692008-08-25 19:56:50 +0200266 }
267 lock_buffer(bh);
268 if (new)
269 memset(bh->b_data, 0, sb->s_blocksize);
270 memcpy(bh->b_data + offset, data, len);
271 flush_dcache_page(bh->b_page);
Jan Karaaf09e512008-11-25 15:31:28 +0100272 set_buffer_uptodate(bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200273 unlock_buffer(bh);
Joel Becker8cb471e2009-02-10 20:00:41 -0800274 ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh);
Joel Becker0cf2f762009-02-12 16:41:25 -0800275 err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh,
276 ja_type);
Jan Karaaf09e512008-11-25 15:31:28 +0100277 if (err < 0) {
278 brelse(bh);
279 goto out;
280 }
Joel Beckerec20cec2010-03-19 14:13:52 -0700281 ocfs2_journal_dirty(handle, bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200282 brelse(bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200283out:
284 if (err) {
Jan Kara9e33d692008-08-25 19:56:50 +0200285 mlog_errno(err);
286 return err;
287 }
288 gqinode->i_version++;
289 ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
Jan Kara9e33d692008-08-25 19:56:50 +0200290 return len;
291}
292
293int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
294{
295 int status;
296 struct buffer_head *bh = NULL;
297
298 status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
299 if (status < 0)
300 return status;
301 spin_lock(&dq_data_lock);
302 if (!oinfo->dqi_gqi_count++)
303 oinfo->dqi_gqi_bh = bh;
304 else
305 WARN_ON(bh != oinfo->dqi_gqi_bh);
306 spin_unlock(&dq_data_lock);
Jan Karafb8dd8d2010-03-31 16:25:37 +0200307 if (ex) {
308 mutex_lock(&oinfo->dqi_gqinode->i_mutex);
309 down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
310 } else {
311 down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
312 }
Jan Kara9e33d692008-08-25 19:56:50 +0200313 return 0;
314}
315
316void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
317{
Jan Karafb8dd8d2010-03-31 16:25:37 +0200318 if (ex) {
319 up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
320 mutex_unlock(&oinfo->dqi_gqinode->i_mutex);
321 } else {
322 up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
323 }
Jan Kara9e33d692008-08-25 19:56:50 +0200324 ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
325 brelse(oinfo->dqi_gqi_bh);
326 spin_lock(&dq_data_lock);
327 if (!--oinfo->dqi_gqi_count)
328 oinfo->dqi_gqi_bh = NULL;
329 spin_unlock(&dq_data_lock);
330}
331
332/* Read information header from global quota file */
333int ocfs2_global_read_info(struct super_block *sb, int type)
334{
335 struct inode *gqinode = NULL;
336 unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
337 GROUP_QUOTA_SYSTEM_INODE };
338 struct ocfs2_global_disk_dqinfo dinfo;
339 struct mem_dqinfo *info = sb_dqinfo(sb, type);
340 struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
Jan Karaae4f6ef2010-04-28 19:04:29 +0200341 u64 pcount;
Jan Kara9e33d692008-08-25 19:56:50 +0200342 int status;
343
344 mlog_entry_void();
345
346 /* 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:
405 mlog_exit(status);
406 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;
482 int type = dquot->dq_type;
483 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);
Jan Kara9a2f3862008-11-25 15:31:30 +0100511 mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n",
512 dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange,
513 dquot->dq_dqb.dqb_curinodes, (long long)inodechange);
Jan Kara9e33d692008-08-25 19:56:50 +0200514 if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
515 dquot->dq_dqb.dqb_curspace += spacechange;
516 if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
517 dquot->dq_dqb.dqb_curinodes += inodechange;
518 /* Set properly space grace time... */
519 if (dquot->dq_dqb.dqb_bsoftlimit &&
520 dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
521 if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
522 oldbtime > 0) {
523 if (dquot->dq_dqb.dqb_btime > 0)
524 dquot->dq_dqb.dqb_btime =
525 min(dquot->dq_dqb.dqb_btime, oldbtime);
526 else
527 dquot->dq_dqb.dqb_btime = oldbtime;
528 }
529 } else {
530 dquot->dq_dqb.dqb_btime = 0;
531 clear_bit(DQ_BLKS_B, &dquot->dq_flags);
532 }
533 /* Set properly inode grace time... */
534 if (dquot->dq_dqb.dqb_isoftlimit &&
535 dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
536 if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
537 olditime > 0) {
538 if (dquot->dq_dqb.dqb_itime > 0)
539 dquot->dq_dqb.dqb_itime =
540 min(dquot->dq_dqb.dqb_itime, olditime);
541 else
542 dquot->dq_dqb.dqb_itime = olditime;
543 }
544 } else {
545 dquot->dq_dqb.dqb_itime = 0;
546 clear_bit(DQ_INODES_B, &dquot->dq_flags);
547 }
548 /* All information is properly updated, clear the flags */
549 __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
550 __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
551 __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
552 __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
553 __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
554 __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
555 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
556 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
557 spin_unlock(&dq_data_lock);
558 err = ocfs2_qinfo_lock(info, freeing);
559 if (err < 0) {
560 mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
561 " (type=%d, id=%u)\n", dquot->dq_type,
562 (unsigned)dquot->dq_id);
563 goto out;
564 }
565 if (freeing)
566 OCFS2_DQUOT(dquot)->dq_use_count--;
567 err = qtree_write_dquot(&info->dqi_gi, dquot);
568 if (err < 0)
569 goto out_qlock;
570 if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
571 err = qtree_release_dquot(&info->dqi_gi, dquot);
572 if (info_dirty(sb_dqinfo(sb, type))) {
573 err2 = __ocfs2_global_write_info(sb, type);
574 if (!err)
575 err = err2;
576 }
577 }
578out_qlock:
579 ocfs2_qinfo_unlock(info, freeing);
580out:
581 if (err < 0)
582 mlog_errno(err);
583 return err;
584}
585
586/*
Mark Fasheh171bf932008-10-20 15:36:47 +0200587 * Functions for periodic syncing of dquots with global file
588 */
589static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
590{
591 handle_t *handle;
592 struct super_block *sb = dquot->dq_sb;
593 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
594 struct ocfs2_super *osb = OCFS2_SB(sb);
595 int status = 0;
596
597 mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id,
598 dquot->dq_type, type, sb->s_id);
599 if (type != dquot->dq_type)
600 goto out;
601 status = ocfs2_lock_global_qf(oinfo, 1);
602 if (status < 0)
603 goto out;
604
605 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
606 if (IS_ERR(handle)) {
607 status = PTR_ERR(handle);
608 mlog_errno(status);
609 goto out_ilock;
610 }
611 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
612 status = ocfs2_sync_dquot(dquot);
Mark Fasheh171bf932008-10-20 15:36:47 +0200613 if (status < 0)
614 mlog_errno(status);
615 /* We have to write local structure as well... */
Jan Kara741e1282010-05-13 18:05:15 +0200616 status = ocfs2_local_write_dquot(dquot);
Mark Fasheh171bf932008-10-20 15:36:47 +0200617 if (status < 0)
618 mlog_errno(status);
Jan Kara741e1282010-05-13 18:05:15 +0200619 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
Mark Fasheh171bf932008-10-20 15:36:47 +0200620 ocfs2_commit_trans(osb, handle);
621out_ilock:
622 ocfs2_unlock_global_qf(oinfo, 1);
623out:
624 mlog_exit(status);
625 return status;
626}
627
628static void qsync_work_fn(struct work_struct *work)
629{
630 struct ocfs2_mem_dqinfo *oinfo = container_of(work,
631 struct ocfs2_mem_dqinfo,
632 dqi_sync_work.work);
633 struct super_block *sb = oinfo->dqi_gqinode->i_sb;
634
635 dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
Tejun Heo316873c2011-02-01 11:42:42 +0100636 schedule_delayed_work(&oinfo->dqi_sync_work,
637 msecs_to_jiffies(oinfo->dqi_syncms));
Mark Fasheh171bf932008-10-20 15:36:47 +0200638}
639
640/*
Jan Kara9e33d692008-08-25 19:56:50 +0200641 * Wrappers for generic quota functions
642 */
643
644static int ocfs2_write_dquot(struct dquot *dquot)
645{
646 handle_t *handle;
647 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
648 int status = 0;
649
650 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
651
652 handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
653 if (IS_ERR(handle)) {
654 status = PTR_ERR(handle);
655 mlog_errno(status);
656 goto out;
657 }
Jan Kara741e1282010-05-13 18:05:15 +0200658 mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
659 status = ocfs2_local_write_dquot(dquot);
660 mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200661 ocfs2_commit_trans(osb, handle);
662out:
663 mlog_exit(status);
664 return status;
665}
666
Jan Karab409d7a2009-08-06 23:29:34 +0200667static int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
Jan Kara9e33d692008-08-25 19:56:50 +0200668{
Jan Karab409d7a2009-08-06 23:29:34 +0200669 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
Jan Kara05849742009-07-22 13:17:21 +0200670 /*
671 * We modify tree, leaf block, global info, local chunk header,
672 * global and local inode; OCFS2_QINFO_WRITE_CREDITS already
673 * accounts for inode update
674 */
Jan Karab409d7a2009-08-06 23:29:34 +0200675 return (oinfo->dqi_gi.dqi_qtree_depth + 2) *
676 OCFS2_QUOTA_BLOCK_UPDATE_CREDITS +
Jan Kara05849742009-07-22 13:17:21 +0200677 OCFS2_QINFO_WRITE_CREDITS +
Jan Kara05849742009-07-22 13:17:21 +0200678 OCFS2_INODE_UPDATE_CREDITS;
Jan Kara9e33d692008-08-25 19:56:50 +0200679}
680
681static int ocfs2_release_dquot(struct dquot *dquot)
682{
683 handle_t *handle;
684 struct ocfs2_mem_dqinfo *oinfo =
685 sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
686 struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
687 int status = 0;
688
689 mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
690
Jan Karafb8dd8d2010-03-31 16:25:37 +0200691 mutex_lock(&dquot->dq_lock);
692 /* Check whether we are not racing with some other dqget() */
693 if (atomic_read(&dquot->dq_count) > 1)
694 goto out;
Jan Kara9e33d692008-08-25 19:56:50 +0200695 status = ocfs2_lock_global_qf(oinfo, 1);
696 if (status < 0)
697 goto out;
698 handle = ocfs2_start_trans(osb,
699 ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
700 if (IS_ERR(handle)) {
701 status = PTR_ERR(handle);
702 mlog_errno(status);
703 goto out_ilock;
704 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200705
706 status = ocfs2_global_release_dquot(dquot);
707 if (status < 0) {
708 mlog_errno(status);
709 goto out_trans;
710 }
711 status = ocfs2_local_release_dquot(handle, dquot);
712 /*
713 * If we fail here, we cannot do much as global structure is
714 * already released. So just complain...
715 */
716 if (status < 0)
717 mlog_errno(status);
718 clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
719out_trans:
Jan Kara9e33d692008-08-25 19:56:50 +0200720 ocfs2_commit_trans(osb, handle);
721out_ilock:
722 ocfs2_unlock_global_qf(oinfo, 1);
723out:
Jan Karafb8dd8d2010-03-31 16:25:37 +0200724 mutex_unlock(&dquot->dq_lock);
Jan Kara9e33d692008-08-25 19:56:50 +0200725 mlog_exit(status);
726 return status;
727}
728
Jan Karafb8dd8d2010-03-31 16:25:37 +0200729/*
730 * Read global dquot structure from disk or create it if it does
731 * not exist. Also update use count of the global structure and
732 * create structure in node-local quota file.
733 */
Jan Kara9e33d692008-08-25 19:56:50 +0200734static int ocfs2_acquire_dquot(struct dquot *dquot)
735{
Jan Karafb8dd8d2010-03-31 16:25:37 +0200736 int status = 0, err;
737 int ex = 0;
738 struct super_block *sb = dquot->dq_sb;
739 struct ocfs2_super *osb = OCFS2_SB(sb);
740 int type = dquot->dq_type;
741 struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
742 struct inode *gqinode = info->dqi_gqinode;
743 int need_alloc = ocfs2_global_qinit_alloc(sb, type);
744 handle_t *handle;
Jan Kara9e33d692008-08-25 19:56:50 +0200745
Jan Karafb8dd8d2010-03-31 16:25:37 +0200746 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
747 mutex_lock(&dquot->dq_lock);
748 /*
749 * We need an exclusive lock, because we're going to update use count
750 * and instantiate possibly new dquot structure
751 */
752 status = ocfs2_lock_global_qf(info, 1);
Jan Kara9e33d692008-08-25 19:56:50 +0200753 if (status < 0)
754 goto out;
Jan Karafb8dd8d2010-03-31 16:25:37 +0200755 if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
756 status = ocfs2_qinfo_lock(info, 0);
757 if (status < 0)
758 goto out_dq;
759 status = qtree_read_dquot(&info->dqi_gi, dquot);
760 ocfs2_qinfo_unlock(info, 0);
761 if (status < 0)
762 goto out_dq;
763 }
764 set_bit(DQ_READ_B, &dquot->dq_flags);
765
766 OCFS2_DQUOT(dquot)->dq_use_count++;
767 OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
768 OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
769 if (!dquot->dq_off) { /* No real quota entry? */
770 ex = 1;
771 /*
772 * Add blocks to quota file before we start a transaction since
773 * locking allocators ranks above a transaction start
774 */
775 WARN_ON(journal_current_handle());
Joel Becker56934862010-07-01 15:13:31 -0700776 status = ocfs2_extend_no_holes(gqinode, NULL,
Jan Karafb8dd8d2010-03-31 16:25:37 +0200777 gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
778 gqinode->i_size);
779 if (status < 0)
780 goto out_dq;
781 }
782
783 handle = ocfs2_start_trans(osb,
784 ocfs2_calc_global_qinit_credits(sb, type));
785 if (IS_ERR(handle)) {
786 status = PTR_ERR(handle);
787 goto out_dq;
788 }
789 status = ocfs2_qinfo_lock(info, ex);
790 if (status < 0)
791 goto out_trans;
792 status = qtree_write_dquot(&info->dqi_gi, dquot);
793 if (ex && info_dirty(sb_dqinfo(sb, type))) {
794 err = __ocfs2_global_write_info(sb, type);
795 if (!status)
796 status = err;
797 }
798 ocfs2_qinfo_unlock(info, ex);
799out_trans:
800 ocfs2_commit_trans(osb, handle);
801out_dq:
802 ocfs2_unlock_global_qf(info, 1);
803 if (status < 0)
804 goto out;
805
806 status = ocfs2_create_local_dquot(dquot);
807 if (status < 0)
808 goto out;
809 set_bit(DQ_ACTIVE_B, &dquot->dq_flags);
Jan Kara9e33d692008-08-25 19:56:50 +0200810out:
Jan Karafb8dd8d2010-03-31 16:25:37 +0200811 mutex_unlock(&dquot->dq_lock);
Jan Kara9e33d692008-08-25 19:56:50 +0200812 mlog_exit(status);
813 return status;
814}
815
816static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
817{
818 unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
819 (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
820 (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
821 (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
822 (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
823 (1 << (DQ_LASTSET_B + QIF_ITIME_B));
824 int sync = 0;
825 int status;
826 struct super_block *sb = dquot->dq_sb;
827 int type = dquot->dq_type;
828 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
829 handle_t *handle;
830 struct ocfs2_super *osb = OCFS2_SB(sb);
831
832 mlog_entry("id=%u, type=%d", dquot->dq_id, type);
Jan Kara9e33d692008-08-25 19:56:50 +0200833
834 /* In case user set some limits, sync dquot immediately to global
835 * quota file so that information propagates quicker */
836 spin_lock(&dq_data_lock);
837 if (dquot->dq_flags & mask)
838 sync = 1;
839 spin_unlock(&dq_data_lock);
Jan Karaf8afead2009-01-12 23:20:32 +0100840 /* This is a slight hack but we can't afford getting global quota
841 * lock if we already have a transaction started. */
842 if (!sync || journal_current_handle()) {
Jan Kara9e33d692008-08-25 19:56:50 +0200843 status = ocfs2_write_dquot(dquot);
844 goto out;
845 }
846 status = ocfs2_lock_global_qf(oinfo, 1);
847 if (status < 0)
848 goto out;
849 handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
850 if (IS_ERR(handle)) {
851 status = PTR_ERR(handle);
852 mlog_errno(status);
853 goto out_ilock;
854 }
Jan Karafb8dd8d2010-03-31 16:25:37 +0200855 mutex_lock(&sb_dqopt(sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200856 status = ocfs2_sync_dquot(dquot);
857 if (status < 0) {
858 mlog_errno(status);
Jan Kara741e1282010-05-13 18:05:15 +0200859 goto out_dlock;
Jan Kara9e33d692008-08-25 19:56:50 +0200860 }
861 /* Now write updated local dquot structure */
Jan Kara741e1282010-05-13 18:05:15 +0200862 status = ocfs2_local_write_dquot(dquot);
863out_dlock:
864 mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
Jan Kara9e33d692008-08-25 19:56:50 +0200865 ocfs2_commit_trans(osb, handle);
866out_ilock:
867 ocfs2_unlock_global_qf(oinfo, 1);
868out:
869 mlog_exit(status);
870 return status;
871}
872
873/* This should happen only after set_dqinfo(). */
874static int ocfs2_write_info(struct super_block *sb, int type)
875{
876 handle_t *handle;
877 int status = 0;
878 struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
879
880 mlog_entry_void();
881
882 status = ocfs2_lock_global_qf(oinfo, 1);
883 if (status < 0)
884 goto out;
885 handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
886 if (IS_ERR(handle)) {
887 status = PTR_ERR(handle);
888 mlog_errno(status);
889 goto out_ilock;
890 }
891 status = dquot_commit_info(sb, type);
892 ocfs2_commit_trans(OCFS2_SB(sb), handle);
893out_ilock:
894 ocfs2_unlock_global_qf(oinfo, 1);
895out:
896 mlog_exit(status);
897 return status;
898}
899
Jan Kara9e33d692008-08-25 19:56:50 +0200900static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
901{
902 struct ocfs2_dquot *dquot =
903 kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
904
905 if (!dquot)
906 return NULL;
907 return &dquot->dq_dquot;
908}
909
910static void ocfs2_destroy_dquot(struct dquot *dquot)
911{
912 kmem_cache_free(ocfs2_dquot_cachep, dquot);
913}
914
Alexey Dobriyan61e225d2009-09-21 17:01:08 -0700915const struct dquot_operations ocfs2_quota_operations = {
Jan Kara741e1282010-05-13 18:05:15 +0200916 /* We never make dquot dirty so .write_dquot is never called */
Jan Kara9e33d692008-08-25 19:56:50 +0200917 .acquire_dquot = ocfs2_acquire_dquot,
918 .release_dquot = ocfs2_release_dquot,
919 .mark_dirty = ocfs2_mark_dquot_dirty,
920 .write_info = ocfs2_write_info,
921 .alloc_dquot = ocfs2_alloc_dquot,
922 .destroy_dquot = ocfs2_destroy_dquot,
923};