Commit | Line | Data |
---|---|---|
9e33d69f JK |
1 | /* |
2 | * Implementation of operations over global quota file | |
3 | */ | |
171bf93c | 4 | #include <linux/spinlock.h> |
9e33d69f | 5 | #include <linux/fs.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
9e33d69f JK |
7 | #include <linux/quota.h> |
8 | #include <linux/quotaops.h> | |
9 | #include <linux/dqblk_qtree.h> | |
171bf93c MF |
10 | #include <linux/jiffies.h> |
11 | #include <linux/writeback.h> | |
12 | #include <linux/workqueue.h> | |
9e33d69f JK |
13 | |
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" | |
d6b32bbb | 20 | #include "blockcheck.h" |
9e33d69f JK |
21 | #include "inode.h" |
22 | #include "journal.h" | |
23 | #include "file.h" | |
24 | #include "sysfile.h" | |
25 | #include "dlmglue.h" | |
26 | #include "uptodate.h" | |
ada50827 | 27 | #include "super.h" |
9e33d69f JK |
28 | #include "quota.h" |
29 | ||
171bf93c MF |
30 | static struct workqueue_struct *ocfs2_quota_wq = NULL; |
31 | ||
32 | static void qsync_work_fn(struct work_struct *work); | |
33 | ||
9e33d69f JK |
34 | static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp) |
35 | { | |
36 | struct ocfs2_global_disk_dqblk *d = dp; | |
37 | struct mem_dqblk *m = &dquot->dq_dqb; | |
38 | ||
39 | /* Update from disk only entries not set by the admin */ | |
40 | if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) { | |
41 | m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); | |
42 | m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); | |
43 | } | |
44 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
45 | m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); | |
46 | if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) { | |
47 | m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit); | |
48 | m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit); | |
49 | } | |
50 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) | |
51 | m->dqb_curspace = le64_to_cpu(d->dqb_curspace); | |
52 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags)) | |
53 | m->dqb_btime = le64_to_cpu(d->dqb_btime); | |
54 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags)) | |
55 | m->dqb_itime = le64_to_cpu(d->dqb_itime); | |
56 | OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count); | |
57 | } | |
58 | ||
59 | static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot) | |
60 | { | |
61 | struct ocfs2_global_disk_dqblk *d = dp; | |
62 | struct mem_dqblk *m = &dquot->dq_dqb; | |
63 | ||
64 | d->dqb_id = cpu_to_le32(dquot->dq_id); | |
65 | d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count); | |
66 | d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); | |
67 | d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); | |
68 | d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); | |
69 | d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit); | |
70 | d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit); | |
71 | d->dqb_curspace = cpu_to_le64(m->dqb_curspace); | |
72 | d->dqb_btime = cpu_to_le64(m->dqb_btime); | |
73 | d->dqb_itime = cpu_to_le64(m->dqb_itime); | |
7669f54c | 74 | d->dqb_pad1 = d->dqb_pad2 = 0; |
9e33d69f JK |
75 | } |
76 | ||
77 | static int ocfs2_global_is_id(void *dp, struct dquot *dquot) | |
78 | { | |
79 | struct ocfs2_global_disk_dqblk *d = dp; | |
80 | struct ocfs2_mem_dqinfo *oinfo = | |
81 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
82 | ||
83 | if (qtree_entry_unused(&oinfo->dqi_gi, dp)) | |
84 | return 0; | |
85 | return le32_to_cpu(d->dqb_id) == dquot->dq_id; | |
86 | } | |
87 | ||
88 | struct qtree_fmt_operations ocfs2_global_ops = { | |
89 | .mem2disk_dqblk = ocfs2_global_mem2diskdqb, | |
90 | .disk2mem_dqblk = ocfs2_global_disk2memdqb, | |
91 | .is_id = ocfs2_global_is_id, | |
92 | }; | |
93 | ||
684ef278 JB |
94 | static int ocfs2_validate_quota_block(struct super_block *sb, |
95 | struct buffer_head *bh) | |
96 | { | |
d6b32bbb JB |
97 | struct ocfs2_disk_dqtrailer *dqt = |
98 | ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data); | |
684ef278 JB |
99 | |
100 | mlog(0, "Validating quota block %llu\n", | |
101 | (unsigned long long)bh->b_blocknr); | |
102 | ||
d6b32bbb JB |
103 | BUG_ON(!buffer_uptodate(bh)); |
104 | ||
105 | /* | |
106 | * If the ecc fails, we return the error but otherwise | |
107 | * leave the filesystem running. We know any error is | |
108 | * local to this block. | |
109 | */ | |
110 | return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check); | |
684ef278 JB |
111 | } |
112 | ||
85eb8b73 JB |
113 | int ocfs2_read_quota_block(struct inode *inode, u64 v_block, |
114 | struct buffer_head **bh) | |
9e33d69f | 115 | { |
85eb8b73 JB |
116 | int rc = 0; |
117 | struct buffer_head *tmp = *bh; | |
9e33d69f | 118 | |
ada50827 JK |
119 | if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) { |
120 | ocfs2_error(inode->i_sb, | |
121 | "Quota file %llu is probably corrupted! Requested " | |
122 | "to read block %Lu but file has size only %Lu\n", | |
123 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
124 | (unsigned long long)v_block, | |
125 | (unsigned long long)i_size_read(inode)); | |
126 | return -EIO; | |
127 | } | |
684ef278 JB |
128 | rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0, |
129 | ocfs2_validate_quota_block); | |
85eb8b73 JB |
130 | if (rc) |
131 | mlog_errno(rc); | |
132 | ||
133 | /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */ | |
134 | if (!rc && !*bh) | |
135 | *bh = tmp; | |
9e33d69f | 136 | |
85eb8b73 | 137 | return rc; |
9e33d69f JK |
138 | } |
139 | ||
53a36046 JK |
140 | static int ocfs2_get_quota_block(struct inode *inode, int block, |
141 | struct buffer_head **bh) | |
9e33d69f JK |
142 | { |
143 | u64 pblock, pcount; | |
53a36046 | 144 | int err; |
9e33d69f JK |
145 | |
146 | down_read(&OCFS2_I(inode)->ip_alloc_sem); | |
53a36046 | 147 | err = ocfs2_extent_map_get_blocks(inode, block, &pblock, &pcount, NULL); |
9e33d69f | 148 | up_read(&OCFS2_I(inode)->ip_alloc_sem); |
53a36046 JK |
149 | if (err) { |
150 | mlog_errno(err); | |
151 | return err; | |
9e33d69f | 152 | } |
53a36046 JK |
153 | *bh = sb_getblk(inode->i_sb, pblock); |
154 | if (!*bh) { | |
155 | err = -EIO; | |
156 | mlog_errno(err); | |
9e33d69f | 157 | } |
a419aef8 | 158 | return err; |
9e33d69f JK |
159 | } |
160 | ||
161 | /* 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. */ | |
164 | ssize_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; | |
175 | ||
176 | if (off > i_size) | |
177 | return 0; | |
178 | if (off + len > i_size) | |
179 | len = i_size - off; | |
180 | toread = len; | |
181 | while (toread > 0) { | |
dad7d975 | 182 | tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
85eb8b73 JB |
183 | bh = NULL; |
184 | err = ocfs2_read_quota_block(gqinode, blk, &bh); | |
185 | if (err) { | |
9e33d69f JK |
186 | mlog_errno(err); |
187 | return err; | |
188 | } | |
189 | memcpy(data, bh->b_data + offset, tocopy); | |
190 | brelse(bh); | |
191 | offset = 0; | |
192 | toread -= tocopy; | |
193 | data += tocopy; | |
194 | blk++; | |
195 | } | |
196 | return len; | |
197 | } | |
198 | ||
199 | /* Write to quotafile (we know the transaction is already started and has | |
200 | * enough credits) */ | |
201 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, | |
202 | const char *data, size_t len, loff_t off) | |
203 | { | |
204 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
205 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
206 | struct inode *gqinode = oinfo->dqi_gqinode; | |
207 | int offset = off & (sb->s_blocksize - 1); | |
208 | sector_t blk = off >> sb->s_blocksize_bits; | |
af09e51b | 209 | int err = 0, new = 0, ja_type; |
85eb8b73 | 210 | struct buffer_head *bh = NULL; |
9e33d69f JK |
211 | handle_t *handle = journal_current_handle(); |
212 | ||
213 | if (!handle) { | |
214 | mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled " | |
215 | "because transaction was not started.\n", | |
216 | (unsigned long long)off, (unsigned long long)len); | |
217 | return -EIO; | |
218 | } | |
219 | if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) { | |
220 | WARN_ON(1); | |
221 | len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset; | |
222 | } | |
223 | ||
224 | mutex_lock_nested(&gqinode->i_mutex, I_MUTEX_QUOTA); | |
225 | if (gqinode->i_size < off + len) { | |
b57ac2c4 JK |
226 | loff_t rounded_end = |
227 | ocfs2_align_bytes_to_blocks(sb, off + len); | |
228 | ||
b409d7a0 | 229 | /* Space is already allocated in ocfs2_global_read_dquot() */ |
9e33d69f JK |
230 | err = ocfs2_simple_size_update(gqinode, |
231 | oinfo->dqi_gqi_bh, | |
b57ac2c4 | 232 | rounded_end); |
9e33d69f JK |
233 | if (err < 0) |
234 | goto out; | |
235 | new = 1; | |
236 | } | |
237 | /* Not rewriting whole block? */ | |
238 | if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) && | |
239 | !new) { | |
85eb8b73 | 240 | err = ocfs2_read_quota_block(gqinode, blk, &bh); |
af09e51b | 241 | ja_type = OCFS2_JOURNAL_ACCESS_WRITE; |
9e33d69f | 242 | } else { |
53a36046 | 243 | err = ocfs2_get_quota_block(gqinode, blk, &bh); |
af09e51b | 244 | ja_type = OCFS2_JOURNAL_ACCESS_CREATE; |
9e33d69f | 245 | } |
af09e51b JK |
246 | if (err) { |
247 | mlog_errno(err); | |
e9956fae | 248 | goto out; |
9e33d69f JK |
249 | } |
250 | lock_buffer(bh); | |
251 | if (new) | |
252 | memset(bh->b_data, 0, sb->s_blocksize); | |
253 | memcpy(bh->b_data + offset, data, len); | |
254 | flush_dcache_page(bh->b_page); | |
af09e51b | 255 | set_buffer_uptodate(bh); |
9e33d69f | 256 | unlock_buffer(bh); |
8cb471e8 | 257 | ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh); |
0cf2f763 JB |
258 | err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh, |
259 | ja_type); | |
af09e51b JK |
260 | if (err < 0) { |
261 | brelse(bh); | |
262 | goto out; | |
263 | } | |
9e33d69f JK |
264 | err = ocfs2_journal_dirty(handle, bh); |
265 | brelse(bh); | |
266 | if (err < 0) | |
267 | goto out; | |
268 | out: | |
269 | if (err) { | |
270 | mutex_unlock(&gqinode->i_mutex); | |
271 | mlog_errno(err); | |
272 | return err; | |
273 | } | |
274 | gqinode->i_version++; | |
275 | ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh); | |
276 | mutex_unlock(&gqinode->i_mutex); | |
277 | return len; | |
278 | } | |
279 | ||
280 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) | |
281 | { | |
282 | int status; | |
283 | struct buffer_head *bh = NULL; | |
284 | ||
285 | status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex); | |
286 | if (status < 0) | |
287 | return status; | |
288 | spin_lock(&dq_data_lock); | |
289 | if (!oinfo->dqi_gqi_count++) | |
290 | oinfo->dqi_gqi_bh = bh; | |
291 | else | |
292 | WARN_ON(bh != oinfo->dqi_gqi_bh); | |
293 | spin_unlock(&dq_data_lock); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) | |
298 | { | |
299 | ocfs2_inode_unlock(oinfo->dqi_gqinode, ex); | |
300 | brelse(oinfo->dqi_gqi_bh); | |
301 | spin_lock(&dq_data_lock); | |
302 | if (!--oinfo->dqi_gqi_count) | |
303 | oinfo->dqi_gqi_bh = NULL; | |
304 | spin_unlock(&dq_data_lock); | |
305 | } | |
306 | ||
307 | /* Read information header from global quota file */ | |
308 | int ocfs2_global_read_info(struct super_block *sb, int type) | |
309 | { | |
310 | struct inode *gqinode = NULL; | |
311 | unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, | |
312 | GROUP_QUOTA_SYSTEM_INODE }; | |
313 | struct ocfs2_global_disk_dqinfo dinfo; | |
314 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
315 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
316 | int status; | |
317 | ||
318 | mlog_entry_void(); | |
319 | ||
320 | /* Read global header */ | |
321 | gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], | |
322 | OCFS2_INVALID_SLOT); | |
323 | if (!gqinode) { | |
324 | mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n", | |
325 | type); | |
326 | status = -EINVAL; | |
327 | goto out_err; | |
328 | } | |
329 | oinfo->dqi_gi.dqi_sb = sb; | |
330 | oinfo->dqi_gi.dqi_type = type; | |
331 | ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo); | |
332 | oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); | |
333 | oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; | |
334 | oinfo->dqi_gqi_bh = NULL; | |
335 | oinfo->dqi_gqi_count = 0; | |
336 | oinfo->dqi_gqinode = gqinode; | |
337 | status = ocfs2_lock_global_qf(oinfo, 0); | |
338 | if (status < 0) { | |
339 | mlog_errno(status); | |
340 | goto out_err; | |
341 | } | |
342 | status = sb->s_op->quota_read(sb, type, (char *)&dinfo, | |
343 | sizeof(struct ocfs2_global_disk_dqinfo), | |
344 | OCFS2_GLOBAL_INFO_OFF); | |
345 | ocfs2_unlock_global_qf(oinfo, 0); | |
346 | if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
347 | mlog(ML_ERROR, "Cannot read global quota info (%d).\n", | |
348 | status); | |
349 | if (status >= 0) | |
350 | status = -EIO; | |
351 | mlog_errno(status); | |
352 | goto out_err; | |
353 | } | |
354 | info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); | |
355 | info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); | |
356 | oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); | |
357 | oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); | |
358 | oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); | |
359 | oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); | |
360 | oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; | |
361 | oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - | |
362 | OCFS2_QBLK_RESERVED_SPACE; | |
363 | oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi); | |
171bf93c MF |
364 | INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
365 | queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work, | |
4539f1df | 366 | msecs_to_jiffies(oinfo->dqi_syncms)); |
171bf93c | 367 | |
9e33d69f JK |
368 | out_err: |
369 | mlog_exit(status); | |
370 | return status; | |
371 | } | |
372 | ||
373 | /* Write information to global quota file. Expects exlusive lock on quota | |
374 | * file inode and quota info */ | |
375 | static int __ocfs2_global_write_info(struct super_block *sb, int type) | |
376 | { | |
377 | struct mem_dqinfo *info = sb_dqinfo(sb, type); | |
378 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; | |
379 | struct ocfs2_global_disk_dqinfo dinfo; | |
380 | ssize_t size; | |
381 | ||
382 | spin_lock(&dq_data_lock); | |
383 | info->dqi_flags &= ~DQF_INFO_DIRTY; | |
384 | dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); | |
385 | dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); | |
386 | spin_unlock(&dq_data_lock); | |
387 | dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms); | |
388 | dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks); | |
389 | dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk); | |
390 | dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry); | |
391 | size = sb->s_op->quota_write(sb, type, (char *)&dinfo, | |
392 | sizeof(struct ocfs2_global_disk_dqinfo), | |
393 | OCFS2_GLOBAL_INFO_OFF); | |
394 | if (size != sizeof(struct ocfs2_global_disk_dqinfo)) { | |
395 | mlog(ML_ERROR, "Cannot write global quota info structure\n"); | |
396 | if (size >= 0) | |
397 | size = -EIO; | |
398 | return size; | |
399 | } | |
400 | return 0; | |
401 | } | |
402 | ||
403 | int ocfs2_global_write_info(struct super_block *sb, int type) | |
404 | { | |
405 | int err; | |
406 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
407 | ||
408 | err = ocfs2_qinfo_lock(info, 1); | |
409 | if (err < 0) | |
410 | return err; | |
411 | err = __ocfs2_global_write_info(sb, type); | |
412 | ocfs2_qinfo_unlock(info, 1); | |
413 | return err; | |
414 | } | |
415 | ||
b409d7a0 JK |
416 | static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
417 | { | |
418 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
419 | ||
420 | /* | |
421 | * We may need to allocate tree blocks and a leaf block but not the | |
422 | * root block | |
423 | */ | |
424 | return oinfo->dqi_gi.dqi_qtree_depth; | |
425 | } | |
426 | ||
427 | static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) | |
428 | { | |
429 | /* We modify all the allocated blocks, tree root, and info block */ | |
430 | return (ocfs2_global_qinit_alloc(sb, type) + 2) * | |
431 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS; | |
432 | } | |
433 | ||
9e33d69f JK |
434 | /* Read in information from global quota file and acquire a reference to it. |
435 | * dquot_acquire() has already started the transaction and locked quota file */ | |
436 | int ocfs2_global_read_dquot(struct dquot *dquot) | |
437 | { | |
438 | int err, err2, ex = 0; | |
b409d7a0 JK |
439 | struct super_block *sb = dquot->dq_sb; |
440 | int type = dquot->dq_type; | |
441 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
442 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
443 | struct inode *gqinode = info->dqi_gqinode; | |
444 | int need_alloc = ocfs2_global_qinit_alloc(sb, type); | |
445 | handle_t *handle = NULL; | |
9e33d69f JK |
446 | |
447 | err = ocfs2_qinfo_lock(info, 0); | |
448 | if (err < 0) | |
449 | goto out; | |
450 | err = qtree_read_dquot(&info->dqi_gi, dquot); | |
451 | if (err < 0) | |
452 | goto out_qlock; | |
453 | OCFS2_DQUOT(dquot)->dq_use_count++; | |
454 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
455 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
b409d7a0 JK |
456 | ocfs2_qinfo_unlock(info, 0); |
457 | ||
9e33d69f | 458 | if (!dquot->dq_off) { /* No real quota entry? */ |
9e33d69f | 459 | ex = 1; |
b409d7a0 JK |
460 | /* |
461 | * Add blocks to quota file before we start a transaction since | |
462 | * locking allocators ranks above a transaction start | |
463 | */ | |
464 | WARN_ON(journal_current_handle()); | |
465 | down_write(&OCFS2_I(gqinode)->ip_alloc_sem); | |
466 | err = ocfs2_extend_no_holes(gqinode, | |
467 | gqinode->i_size + (need_alloc << sb->s_blocksize_bits), | |
468 | gqinode->i_size); | |
469 | up_write(&OCFS2_I(gqinode)->ip_alloc_sem); | |
470 | if (err < 0) | |
471 | goto out; | |
9e33d69f | 472 | } |
b409d7a0 JK |
473 | |
474 | handle = ocfs2_start_trans(osb, | |
475 | ocfs2_calc_global_qinit_credits(sb, type)); | |
476 | if (IS_ERR(handle)) { | |
477 | err = PTR_ERR(handle); | |
478 | goto out; | |
479 | } | |
480 | err = ocfs2_qinfo_lock(info, ex); | |
481 | if (err < 0) | |
482 | goto out_trans; | |
9e33d69f JK |
483 | err = qtree_write_dquot(&info->dqi_gi, dquot); |
484 | if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) { | |
485 | err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type); | |
486 | if (!err) | |
487 | err = err2; | |
488 | } | |
489 | out_qlock: | |
490 | if (ex) | |
491 | ocfs2_qinfo_unlock(info, 1); | |
4e8a3019 JK |
492 | else |
493 | ocfs2_qinfo_unlock(info, 0); | |
b409d7a0 JK |
494 | out_trans: |
495 | if (handle) | |
496 | ocfs2_commit_trans(osb, handle); | |
9e33d69f JK |
497 | out: |
498 | if (err < 0) | |
499 | mlog_errno(err); | |
500 | return err; | |
501 | } | |
502 | ||
503 | /* Sync local information about quota modifications with global quota file. | |
504 | * Caller must have started the transaction and obtained exclusive lock for | |
505 | * global quota file inode */ | |
506 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) | |
507 | { | |
508 | int err, err2; | |
509 | struct super_block *sb = dquot->dq_sb; | |
510 | int type = dquot->dq_type; | |
511 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; | |
512 | struct ocfs2_global_disk_dqblk dqblk; | |
513 | s64 spacechange, inodechange; | |
514 | time_t olditime, oldbtime; | |
515 | ||
516 | err = sb->s_op->quota_read(sb, type, (char *)&dqblk, | |
517 | sizeof(struct ocfs2_global_disk_dqblk), | |
518 | dquot->dq_off); | |
519 | if (err != sizeof(struct ocfs2_global_disk_dqblk)) { | |
520 | if (err >= 0) { | |
521 | mlog(ML_ERROR, "Short read from global quota file " | |
522 | "(%u read)\n", err); | |
523 | err = -EIO; | |
524 | } | |
525 | goto out; | |
526 | } | |
527 | ||
528 | /* Update space and inode usage. Get also other information from | |
529 | * global quota file so that we don't overwrite any changes there. | |
530 | * We are */ | |
531 | spin_lock(&dq_data_lock); | |
532 | spacechange = dquot->dq_dqb.dqb_curspace - | |
533 | OCFS2_DQUOT(dquot)->dq_origspace; | |
534 | inodechange = dquot->dq_dqb.dqb_curinodes - | |
535 | OCFS2_DQUOT(dquot)->dq_originodes; | |
536 | olditime = dquot->dq_dqb.dqb_itime; | |
537 | oldbtime = dquot->dq_dqb.dqb_btime; | |
538 | ocfs2_global_disk2memdqb(dquot, &dqblk); | |
9a2f3866 JK |
539 | mlog(0, "Syncing global dquot %u space %lld+%lld, inodes %lld+%lld\n", |
540 | dquot->dq_id, dquot->dq_dqb.dqb_curspace, (long long)spacechange, | |
541 | dquot->dq_dqb.dqb_curinodes, (long long)inodechange); | |
9e33d69f JK |
542 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
543 | dquot->dq_dqb.dqb_curspace += spacechange; | |
544 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) | |
545 | dquot->dq_dqb.dqb_curinodes += inodechange; | |
546 | /* Set properly space grace time... */ | |
547 | if (dquot->dq_dqb.dqb_bsoftlimit && | |
548 | dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { | |
549 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && | |
550 | oldbtime > 0) { | |
551 | if (dquot->dq_dqb.dqb_btime > 0) | |
552 | dquot->dq_dqb.dqb_btime = | |
553 | min(dquot->dq_dqb.dqb_btime, oldbtime); | |
554 | else | |
555 | dquot->dq_dqb.dqb_btime = oldbtime; | |
556 | } | |
557 | } else { | |
558 | dquot->dq_dqb.dqb_btime = 0; | |
559 | clear_bit(DQ_BLKS_B, &dquot->dq_flags); | |
560 | } | |
561 | /* Set properly inode grace time... */ | |
562 | if (dquot->dq_dqb.dqb_isoftlimit && | |
563 | dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { | |
564 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && | |
565 | olditime > 0) { | |
566 | if (dquot->dq_dqb.dqb_itime > 0) | |
567 | dquot->dq_dqb.dqb_itime = | |
568 | min(dquot->dq_dqb.dqb_itime, olditime); | |
569 | else | |
570 | dquot->dq_dqb.dqb_itime = olditime; | |
571 | } | |
572 | } else { | |
573 | dquot->dq_dqb.dqb_itime = 0; | |
574 | clear_bit(DQ_INODES_B, &dquot->dq_flags); | |
575 | } | |
576 | /* All information is properly updated, clear the flags */ | |
577 | __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); | |
578 | __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); | |
579 | __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); | |
580 | __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); | |
581 | __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); | |
582 | __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); | |
583 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; | |
584 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; | |
585 | spin_unlock(&dq_data_lock); | |
586 | err = ocfs2_qinfo_lock(info, freeing); | |
587 | if (err < 0) { | |
588 | mlog(ML_ERROR, "Failed to lock quota info, loosing quota write" | |
589 | " (type=%d, id=%u)\n", dquot->dq_type, | |
590 | (unsigned)dquot->dq_id); | |
591 | goto out; | |
592 | } | |
593 | if (freeing) | |
594 | OCFS2_DQUOT(dquot)->dq_use_count--; | |
595 | err = qtree_write_dquot(&info->dqi_gi, dquot); | |
596 | if (err < 0) | |
597 | goto out_qlock; | |
598 | if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { | |
599 | err = qtree_release_dquot(&info->dqi_gi, dquot); | |
600 | if (info_dirty(sb_dqinfo(sb, type))) { | |
601 | err2 = __ocfs2_global_write_info(sb, type); | |
602 | if (!err) | |
603 | err = err2; | |
604 | } | |
605 | } | |
606 | out_qlock: | |
607 | ocfs2_qinfo_unlock(info, freeing); | |
608 | out: | |
609 | if (err < 0) | |
610 | mlog_errno(err); | |
611 | return err; | |
612 | } | |
613 | ||
171bf93c MF |
614 | /* |
615 | * Functions for periodic syncing of dquots with global file | |
616 | */ | |
617 | static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) | |
618 | { | |
619 | handle_t *handle; | |
620 | struct super_block *sb = dquot->dq_sb; | |
621 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
622 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
623 | int status = 0; | |
624 | ||
625 | mlog_entry("id=%u qtype=%u type=%lu device=%s\n", dquot->dq_id, | |
626 | dquot->dq_type, type, sb->s_id); | |
627 | if (type != dquot->dq_type) | |
628 | goto out; | |
629 | status = ocfs2_lock_global_qf(oinfo, 1); | |
630 | if (status < 0) | |
631 | goto out; | |
632 | ||
633 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
634 | if (IS_ERR(handle)) { | |
635 | status = PTR_ERR(handle); | |
636 | mlog_errno(status); | |
637 | goto out_ilock; | |
638 | } | |
639 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); | |
640 | status = ocfs2_sync_dquot(dquot); | |
641 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); | |
642 | if (status < 0) | |
643 | mlog_errno(status); | |
644 | /* We have to write local structure as well... */ | |
645 | dquot_mark_dquot_dirty(dquot); | |
646 | status = dquot_commit(dquot); | |
647 | if (status < 0) | |
648 | mlog_errno(status); | |
649 | ocfs2_commit_trans(osb, handle); | |
650 | out_ilock: | |
651 | ocfs2_unlock_global_qf(oinfo, 1); | |
652 | out: | |
653 | mlog_exit(status); | |
654 | return status; | |
655 | } | |
656 | ||
657 | static void qsync_work_fn(struct work_struct *work) | |
658 | { | |
659 | struct ocfs2_mem_dqinfo *oinfo = container_of(work, | |
660 | struct ocfs2_mem_dqinfo, | |
661 | dqi_sync_work.work); | |
662 | struct super_block *sb = oinfo->dqi_gqinode->i_sb; | |
663 | ||
664 | dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); | |
665 | queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work, | |
4539f1df | 666 | msecs_to_jiffies(oinfo->dqi_syncms)); |
171bf93c MF |
667 | } |
668 | ||
9e33d69f JK |
669 | /* |
670 | * Wrappers for generic quota functions | |
671 | */ | |
672 | ||
673 | static int ocfs2_write_dquot(struct dquot *dquot) | |
674 | { | |
675 | handle_t *handle; | |
676 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
677 | int status = 0; | |
678 | ||
679 | mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type); | |
680 | ||
681 | handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); | |
682 | if (IS_ERR(handle)) { | |
683 | status = PTR_ERR(handle); | |
684 | mlog_errno(status); | |
685 | goto out; | |
686 | } | |
687 | status = dquot_commit(dquot); | |
688 | ocfs2_commit_trans(osb, handle); | |
689 | out: | |
690 | mlog_exit(status); | |
691 | return status; | |
692 | } | |
693 | ||
b409d7a0 | 694 | static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
9e33d69f | 695 | { |
b409d7a0 | 696 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
0584974a JK |
697 | /* |
698 | * We modify tree, leaf block, global info, local chunk header, | |
699 | * global and local inode; OCFS2_QINFO_WRITE_CREDITS already | |
700 | * accounts for inode update | |
701 | */ | |
b409d7a0 JK |
702 | return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
703 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + | |
0584974a | 704 | OCFS2_QINFO_WRITE_CREDITS + |
0584974a | 705 | OCFS2_INODE_UPDATE_CREDITS; |
9e33d69f JK |
706 | } |
707 | ||
708 | static int ocfs2_release_dquot(struct dquot *dquot) | |
709 | { | |
710 | handle_t *handle; | |
711 | struct ocfs2_mem_dqinfo *oinfo = | |
712 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
713 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); | |
714 | int status = 0; | |
715 | ||
716 | mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type); | |
717 | ||
718 | status = ocfs2_lock_global_qf(oinfo, 1); | |
719 | if (status < 0) | |
720 | goto out; | |
721 | handle = ocfs2_start_trans(osb, | |
722 | ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type)); | |
723 | if (IS_ERR(handle)) { | |
724 | status = PTR_ERR(handle); | |
725 | mlog_errno(status); | |
726 | goto out_ilock; | |
727 | } | |
728 | status = dquot_release(dquot); | |
729 | ocfs2_commit_trans(osb, handle); | |
730 | out_ilock: | |
731 | ocfs2_unlock_global_qf(oinfo, 1); | |
732 | out: | |
733 | mlog_exit(status); | |
734 | return status; | |
735 | } | |
736 | ||
9e33d69f JK |
737 | static int ocfs2_acquire_dquot(struct dquot *dquot) |
738 | { | |
9e33d69f JK |
739 | struct ocfs2_mem_dqinfo *oinfo = |
740 | sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv; | |
9e33d69f JK |
741 | int status = 0; |
742 | ||
743 | mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type); | |
744 | /* We need an exclusive lock, because we're going to update use count | |
745 | * and instantiate possibly new dquot structure */ | |
746 | status = ocfs2_lock_global_qf(oinfo, 1); | |
747 | if (status < 0) | |
748 | goto out; | |
9e33d69f | 749 | status = dquot_acquire(dquot); |
9e33d69f JK |
750 | ocfs2_unlock_global_qf(oinfo, 1); |
751 | out: | |
752 | mlog_exit(status); | |
753 | return status; | |
754 | } | |
755 | ||
756 | static int ocfs2_mark_dquot_dirty(struct dquot *dquot) | |
757 | { | |
758 | unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | | |
759 | (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | | |
760 | (1 << (DQ_LASTSET_B + QIF_INODES_B)) | | |
761 | (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | | |
762 | (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | | |
763 | (1 << (DQ_LASTSET_B + QIF_ITIME_B)); | |
764 | int sync = 0; | |
765 | int status; | |
766 | struct super_block *sb = dquot->dq_sb; | |
767 | int type = dquot->dq_type; | |
768 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
769 | handle_t *handle; | |
770 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
771 | ||
772 | mlog_entry("id=%u, type=%d", dquot->dq_id, type); | |
773 | dquot_mark_dquot_dirty(dquot); | |
774 | ||
775 | /* In case user set some limits, sync dquot immediately to global | |
776 | * quota file so that information propagates quicker */ | |
777 | spin_lock(&dq_data_lock); | |
778 | if (dquot->dq_flags & mask) | |
779 | sync = 1; | |
780 | spin_unlock(&dq_data_lock); | |
f8afead7 JK |
781 | /* This is a slight hack but we can't afford getting global quota |
782 | * lock if we already have a transaction started. */ | |
783 | if (!sync || journal_current_handle()) { | |
9e33d69f JK |
784 | status = ocfs2_write_dquot(dquot); |
785 | goto out; | |
786 | } | |
787 | status = ocfs2_lock_global_qf(oinfo, 1); | |
788 | if (status < 0) | |
789 | goto out; | |
790 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); | |
791 | if (IS_ERR(handle)) { | |
792 | status = PTR_ERR(handle); | |
793 | mlog_errno(status); | |
794 | goto out_ilock; | |
795 | } | |
796 | status = ocfs2_sync_dquot(dquot); | |
797 | if (status < 0) { | |
798 | mlog_errno(status); | |
799 | goto out_trans; | |
800 | } | |
801 | /* Now write updated local dquot structure */ | |
802 | status = dquot_commit(dquot); | |
803 | out_trans: | |
804 | ocfs2_commit_trans(osb, handle); | |
805 | out_ilock: | |
806 | ocfs2_unlock_global_qf(oinfo, 1); | |
807 | out: | |
808 | mlog_exit(status); | |
809 | return status; | |
810 | } | |
811 | ||
812 | /* This should happen only after set_dqinfo(). */ | |
813 | static int ocfs2_write_info(struct super_block *sb, int type) | |
814 | { | |
815 | handle_t *handle; | |
816 | int status = 0; | |
817 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; | |
818 | ||
819 | mlog_entry_void(); | |
820 | ||
821 | status = ocfs2_lock_global_qf(oinfo, 1); | |
822 | if (status < 0) | |
823 | goto out; | |
824 | handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); | |
825 | if (IS_ERR(handle)) { | |
826 | status = PTR_ERR(handle); | |
827 | mlog_errno(status); | |
828 | goto out_ilock; | |
829 | } | |
830 | status = dquot_commit_info(sb, type); | |
831 | ocfs2_commit_trans(OCFS2_SB(sb), handle); | |
832 | out_ilock: | |
833 | ocfs2_unlock_global_qf(oinfo, 1); | |
834 | out: | |
835 | mlog_exit(status); | |
836 | return status; | |
837 | } | |
838 | ||
9e33d69f JK |
839 | static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
840 | { | |
841 | struct ocfs2_dquot *dquot = | |
842 | kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS); | |
843 | ||
844 | if (!dquot) | |
845 | return NULL; | |
846 | return &dquot->dq_dquot; | |
847 | } | |
848 | ||
849 | static void ocfs2_destroy_dquot(struct dquot *dquot) | |
850 | { | |
851 | kmem_cache_free(ocfs2_dquot_cachep, dquot); | |
852 | } | |
853 | ||
61e225dc | 854 | const struct dquot_operations ocfs2_quota_operations = { |
9e33d69f JK |
855 | .write_dquot = ocfs2_write_dquot, |
856 | .acquire_dquot = ocfs2_acquire_dquot, | |
857 | .release_dquot = ocfs2_release_dquot, | |
858 | .mark_dirty = ocfs2_mark_dquot_dirty, | |
859 | .write_info = ocfs2_write_info, | |
860 | .alloc_dquot = ocfs2_alloc_dquot, | |
861 | .destroy_dquot = ocfs2_destroy_dquot, | |
862 | }; | |
171bf93c MF |
863 | |
864 | int ocfs2_quota_setup(void) | |
865 | { | |
866 | ocfs2_quota_wq = create_workqueue("o2quot"); | |
867 | if (!ocfs2_quota_wq) | |
868 | return -ENOMEM; | |
869 | return 0; | |
870 | } | |
871 | ||
872 | void ocfs2_quota_shutdown(void) | |
873 | { | |
874 | if (ocfs2_quota_wq) { | |
875 | flush_workqueue(ocfs2_quota_wq); | |
876 | destroy_workqueue(ocfs2_quota_wq); | |
877 | ocfs2_quota_wq = NULL; | |
878 | } | |
879 | } |