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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | /* | |
11 | * Quota change tags are associated with each transaction that allocates or | |
12 | * deallocates space. Those changes are accumulated locally to each node (in a | |
13 | * per-node file) and then are periodically synced to the quota file. This | |
14 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
15 | * fuzziness in the current usage value of IDs that are being used on different | |
16 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
17 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 18 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
19 | * program to be run on node crashes or anything like that. |
20 | * | |
21 | * There are couple of knobs that let the administrator manage the quota | |
22 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
23 | * sitting on one node before being synced to the quota file. (The default is | |
24 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
25 | * of quota file syncs increases as the user moves closer to their limit. The | |
26 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
27 | * means that there is more contention between the nodes for the quota file. | |
28 | * The default value is one. This sets the maximum theoretical quota overrun | |
29 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
30 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
31 | * number greater than one makes quota syncs more frequent and reduces the | |
32 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
33 | * syncs less frequent. | |
34 | * | |
35 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
36 | * the quota file, so it is not being constantly read. | |
37 | */ | |
38 | ||
39 | #include <linux/sched.h> | |
40 | #include <linux/slab.h> | |
1495f230 | 41 | #include <linux/mm.h> |
b3b94faa DT |
42 | #include <linux/spinlock.h> |
43 | #include <linux/completion.h> | |
44 | #include <linux/buffer_head.h> | |
b3b94faa | 45 | #include <linux/sort.h> |
18ec7d5c | 46 | #include <linux/fs.h> |
2e565bb6 | 47 | #include <linux/bio.h> |
5c676f6d | 48 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
49 | #include <linux/kthread.h> |
50 | #include <linux/freezer.h> | |
2ec46505 | 51 | #include <linux/quota.h> |
1d371b5e | 52 | #include <linux/dqblk_xfs.h> |
9b9f039d | 53 | #include <linux/lockref.h> |
2147dbfd | 54 | #include <linux/list_lru.h> |
b3b94faa DT |
55 | |
56 | #include "gfs2.h" | |
5c676f6d | 57 | #include "incore.h" |
b3b94faa DT |
58 | #include "bmap.h" |
59 | #include "glock.h" | |
60 | #include "glops.h" | |
b3b94faa DT |
61 | #include "log.h" |
62 | #include "meta_io.h" | |
63 | #include "quota.h" | |
64 | #include "rgrp.h" | |
65 | #include "super.h" | |
66 | #include "trans.h" | |
18ec7d5c | 67 | #include "inode.h" |
5c676f6d | 68 | #include "util.h" |
b3b94faa | 69 | |
bb8d8a6f SW |
70 | struct gfs2_quota_change_host { |
71 | u64 qc_change; | |
72 | u32 qc_flags; /* GFS2_QCF_... */ | |
e08d8d7f | 73 | struct kqid qc_id; |
bb8d8a6f SW |
74 | }; |
75 | ||
2147dbfd | 76 | /* Lock order: qd_lock -> qd->lockref.lock -> lru lock */ |
7d80823e | 77 | static DEFINE_SPINLOCK(qd_lock); |
2147dbfd | 78 | struct list_lru gfs2_qd_lru; |
0a7ab79c | 79 | |
2147dbfd | 80 | static void gfs2_qd_dispose(struct list_head *list) |
0a7ab79c AD |
81 | { |
82 | struct gfs2_quota_data *qd; | |
83 | struct gfs2_sbd *sdp; | |
0a7ab79c | 84 | |
2147dbfd SW |
85 | while (!list_empty(list)) { |
86 | qd = list_entry(list->next, struct gfs2_quota_data, qd_lru); | |
0a7ab79c AD |
87 | sdp = qd->qd_gl->gl_sbd; |
88 | ||
2147dbfd SW |
89 | list_del(&qd->qd_lru); |
90 | ||
0a7ab79c | 91 | /* Free from the filesystem-specific list */ |
2147dbfd | 92 | spin_lock(&qd_lock); |
0a7ab79c | 93 | list_del(&qd->qd_list); |
2147dbfd | 94 | spin_unlock(&qd_lock); |
0a7ab79c | 95 | |
0a7ab79c AD |
96 | gfs2_assert_warn(sdp, !qd->qd_change); |
97 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
98 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
99 | ||
f057f6cd | 100 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
101 | atomic_dec(&sdp->sd_quota_count); |
102 | ||
103 | /* Delete it from the common reclaim list */ | |
0a7ab79c | 104 | kmem_cache_free(gfs2_quotad_cachep, qd); |
0a7ab79c | 105 | } |
2147dbfd SW |
106 | } |
107 | ||
108 | ||
109 | static enum lru_status gfs2_qd_isolate(struct list_head *item, spinlock_t *lock, void *arg) | |
110 | { | |
111 | struct list_head *dispose = arg; | |
112 | struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru); | |
113 | ||
114 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
115 | return LRU_SKIP; | |
116 | ||
117 | if (qd->qd_lockref.count == 0) { | |
118 | lockref_mark_dead(&qd->qd_lockref); | |
119 | list_move(&qd->qd_lru, dispose); | |
120 | } | |
121 | ||
122 | spin_unlock(&qd->qd_lockref.lock); | |
123 | return LRU_REMOVED; | |
124 | } | |
125 | ||
126 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
127 | struct shrink_control *sc) | |
128 | { | |
129 | LIST_HEAD(dispose); | |
130 | unsigned long freed; | |
131 | ||
132 | if (!(sc->gfp_mask & __GFP_FS)) | |
133 | return SHRINK_STOP; | |
134 | ||
135 | freed = list_lru_walk_node(&gfs2_qd_lru, sc->nid, gfs2_qd_isolate, | |
136 | &dispose, &sc->nr_to_scan); | |
137 | ||
138 | gfs2_qd_dispose(&dispose); | |
139 | ||
1ab6c499 DC |
140 | return freed; |
141 | } | |
0a7ab79c | 142 | |
2147dbfd SW |
143 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
144 | struct shrink_control *sc) | |
1ab6c499 | 145 | { |
2147dbfd | 146 | return vfs_pressure_ratio(list_lru_count_node(&gfs2_qd_lru, sc->nid)); |
0a7ab79c AD |
147 | } |
148 | ||
2147dbfd SW |
149 | struct shrinker gfs2_qd_shrinker = { |
150 | .count_objects = gfs2_qd_shrink_count, | |
151 | .scan_objects = gfs2_qd_shrink_scan, | |
152 | .seeks = DEFAULT_SEEKS, | |
153 | .flags = SHRINKER_NUMA_AWARE, | |
154 | }; | |
155 | ||
156 | ||
2f6c9896 EB |
157 | static u64 qd2index(struct gfs2_quota_data *qd) |
158 | { | |
05e0a60d EB |
159 | struct kqid qid = qd->qd_id; |
160 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 161 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
162 | } |
163 | ||
cd915493 | 164 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 165 | { |
cd915493 | 166 | u64 offset; |
b3b94faa | 167 | |
2f6c9896 | 168 | offset = qd2index(qd); |
b3b94faa DT |
169 | offset *= sizeof(struct gfs2_quota); |
170 | ||
171 | return offset; | |
172 | } | |
173 | ||
05e0a60d | 174 | static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
175 | struct gfs2_quota_data **qdp) |
176 | { | |
177 | struct gfs2_quota_data *qd; | |
178 | int error; | |
179 | ||
37b2c837 | 180 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
181 | if (!qd) |
182 | return -ENOMEM; | |
183 | ||
9b9f039d SW |
184 | qd->qd_lockref.count = 1; |
185 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 186 | qd->qd_id = qid; |
b3b94faa | 187 | qd->qd_slot = -1; |
2147dbfd | 188 | INIT_LIST_HEAD(&qd->qd_lru); |
b3b94faa | 189 | |
2f6c9896 | 190 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
191 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
192 | if (error) | |
193 | goto fail; | |
194 | ||
b3b94faa DT |
195 | *qdp = qd; |
196 | ||
197 | return 0; | |
198 | ||
a91ea69f | 199 | fail: |
37b2c837 | 200 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
201 | return error; |
202 | } | |
203 | ||
05e0a60d | 204 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
205 | struct gfs2_quota_data **qdp) |
206 | { | |
207 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
208 | int error, found; | |
209 | ||
210 | *qdp = NULL; | |
211 | ||
212 | for (;;) { | |
213 | found = 0; | |
7d80823e | 214 | spin_lock(&qd_lock); |
b3b94faa | 215 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
2147dbfd SW |
216 | if (qid_eq(qd->qd_id, qid) && |
217 | lockref_get_not_dead(&qd->qd_lockref)) { | |
218 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
b3b94faa DT |
219 | found = 1; |
220 | break; | |
221 | } | |
222 | } | |
223 | ||
224 | if (!found) | |
225 | qd = NULL; | |
226 | ||
227 | if (!qd && new_qd) { | |
228 | qd = new_qd; | |
229 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
230 | atomic_inc(&sdp->sd_quota_count); | |
231 | new_qd = NULL; | |
232 | } | |
233 | ||
7d80823e | 234 | spin_unlock(&qd_lock); |
b3b94faa | 235 | |
6a6ada81 | 236 | if (qd) { |
b3b94faa | 237 | if (new_qd) { |
f057f6cd | 238 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 239 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
240 | } |
241 | *qdp = qd; | |
242 | return 0; | |
243 | } | |
244 | ||
05e0a60d | 245 | error = qd_alloc(sdp, qid, &new_qd); |
b3b94faa DT |
246 | if (error) |
247 | return error; | |
248 | } | |
249 | } | |
250 | ||
251 | static void qd_hold(struct gfs2_quota_data *qd) | |
252 | { | |
253 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
9b9f039d SW |
254 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
255 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
256 | } |
257 | ||
258 | static void qd_put(struct gfs2_quota_data *qd) | |
259 | { | |
2147dbfd SW |
260 | if (lockref_put_or_lock(&qd->qd_lockref)) |
261 | return; | |
9b9f039d | 262 | |
2147dbfd SW |
263 | qd->qd_lockref.count = 0; |
264 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
265 | spin_unlock(&qd->qd_lockref.lock); | |
9b9f039d | 266 | |
b3b94faa DT |
267 | } |
268 | ||
269 | static int slot_get(struct gfs2_quota_data *qd) | |
270 | { | |
271 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
272 | unsigned int c, o = 0, b; | |
273 | unsigned char byte = 0; | |
274 | ||
7d80823e | 275 | spin_lock(&qd_lock); |
b3b94faa DT |
276 | |
277 | if (qd->qd_slot_count++) { | |
7d80823e | 278 | spin_unlock(&qd_lock); |
b3b94faa DT |
279 | return 0; |
280 | } | |
281 | ||
282 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
283 | for (o = 0; o < PAGE_SIZE; o++) { | |
284 | byte = sdp->sd_quota_bitmap[c][o]; | |
285 | if (byte != 0xFF) | |
286 | goto found; | |
287 | } | |
288 | ||
289 | goto fail; | |
290 | ||
a91ea69f | 291 | found: |
b3b94faa DT |
292 | for (b = 0; b < 8; b++) |
293 | if (!(byte & (1 << b))) | |
294 | break; | |
295 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
296 | ||
297 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
298 | goto fail; | |
299 | ||
300 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
301 | ||
7d80823e | 302 | spin_unlock(&qd_lock); |
b3b94faa DT |
303 | |
304 | return 0; | |
305 | ||
a91ea69f | 306 | fail: |
b3b94faa | 307 | qd->qd_slot_count--; |
7d80823e | 308 | spin_unlock(&qd_lock); |
b3b94faa DT |
309 | return -ENOSPC; |
310 | } | |
311 | ||
312 | static void slot_hold(struct gfs2_quota_data *qd) | |
313 | { | |
314 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
315 | ||
7d80823e | 316 | spin_lock(&qd_lock); |
b3b94faa DT |
317 | gfs2_assert(sdp, qd->qd_slot_count); |
318 | qd->qd_slot_count++; | |
7d80823e | 319 | spin_unlock(&qd_lock); |
b3b94faa DT |
320 | } |
321 | ||
26e43a15 SW |
322 | static void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap, |
323 | unsigned int bit, int new_value) | |
324 | { | |
325 | unsigned int c, o, b = bit; | |
326 | int old_value; | |
327 | ||
328 | c = b / (8 * PAGE_SIZE); | |
329 | b %= 8 * PAGE_SIZE; | |
330 | o = b / 8; | |
331 | b %= 8; | |
332 | ||
333 | old_value = (bitmap[c][o] & (1 << b)); | |
334 | gfs2_assert_withdraw(sdp, !old_value != !new_value); | |
335 | ||
336 | if (new_value) | |
337 | bitmap[c][o] |= 1 << b; | |
338 | else | |
339 | bitmap[c][o] &= ~(1 << b); | |
340 | } | |
341 | ||
b3b94faa DT |
342 | static void slot_put(struct gfs2_quota_data *qd) |
343 | { | |
344 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
345 | ||
7d80823e | 346 | spin_lock(&qd_lock); |
b3b94faa DT |
347 | gfs2_assert(sdp, qd->qd_slot_count); |
348 | if (!--qd->qd_slot_count) { | |
349 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
350 | qd->qd_slot = -1; | |
351 | } | |
7d80823e | 352 | spin_unlock(&qd_lock); |
b3b94faa DT |
353 | } |
354 | ||
355 | static int bh_get(struct gfs2_quota_data *qd) | |
356 | { | |
357 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 358 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 359 | unsigned int block, offset; |
b3b94faa DT |
360 | struct buffer_head *bh; |
361 | int error; | |
23591256 | 362 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 363 | |
f55ab26a | 364 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
365 | |
366 | if (qd->qd_bh_count++) { | |
f55ab26a | 367 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
368 | return 0; |
369 | } | |
370 | ||
371 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 372 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 373 | |
23591256 | 374 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 375 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
376 | if (error) |
377 | goto fail; | |
7276b3b0 | 378 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
379 | if (error) |
380 | goto fail; | |
381 | error = -EIO; | |
382 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
383 | goto fail_brelse; | |
384 | ||
385 | qd->qd_bh = bh; | |
386 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
387 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
388 | offset * sizeof(struct gfs2_quota_change)); | |
389 | ||
2e95b665 | 390 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
391 | |
392 | return 0; | |
393 | ||
a91ea69f | 394 | fail_brelse: |
b3b94faa | 395 | brelse(bh); |
a91ea69f | 396 | fail: |
b3b94faa | 397 | qd->qd_bh_count--; |
f55ab26a | 398 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
399 | return error; |
400 | } | |
401 | ||
402 | static void bh_put(struct gfs2_quota_data *qd) | |
403 | { | |
404 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
405 | ||
f55ab26a | 406 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
407 | gfs2_assert(sdp, qd->qd_bh_count); |
408 | if (!--qd->qd_bh_count) { | |
409 | brelse(qd->qd_bh); | |
410 | qd->qd_bh = NULL; | |
411 | qd->qd_bh_qc = NULL; | |
412 | } | |
f55ab26a | 413 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
414 | } |
415 | ||
1bf59bf6 SW |
416 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
417 | u64 *sync_gen) | |
418 | { | |
419 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
420 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
421 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
422 | return 0; | |
423 | ||
2147dbfd SW |
424 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
425 | return 0; | |
1bf59bf6 | 426 | |
2147dbfd | 427 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 428 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 SW |
429 | qd->qd_change_sync = qd->qd_change; |
430 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
431 | qd->qd_slot_count++; | |
432 | return 1; | |
433 | } | |
434 | ||
b3b94faa DT |
435 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
436 | { | |
437 | struct gfs2_quota_data *qd = NULL; | |
438 | int error; | |
439 | int found = 0; | |
440 | ||
441 | *qdp = NULL; | |
442 | ||
443 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
444 | return 0; | |
445 | ||
7d80823e | 446 | spin_lock(&qd_lock); |
b3b94faa DT |
447 | |
448 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
449 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
450 | if (found) | |
451 | break; | |
b3b94faa DT |
452 | } |
453 | ||
454 | if (!found) | |
455 | qd = NULL; | |
456 | ||
7d80823e | 457 | spin_unlock(&qd_lock); |
b3b94faa DT |
458 | |
459 | if (qd) { | |
460 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
461 | error = bh_get(qd); | |
462 | if (error) { | |
463 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
464 | slot_put(qd); | |
465 | qd_put(qd); | |
466 | return error; | |
467 | } | |
468 | } | |
469 | ||
470 | *qdp = qd; | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
b3b94faa DT |
475 | static void qd_unlock(struct gfs2_quota_data *qd) |
476 | { | |
568f4c96 SW |
477 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
478 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
479 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
480 | bh_put(qd); | |
481 | slot_put(qd); | |
482 | qd_put(qd); | |
483 | } | |
484 | ||
b59c8b6f | 485 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
486 | struct gfs2_quota_data **qdp) |
487 | { | |
488 | int error; | |
489 | ||
05e0a60d | 490 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
491 | if (error) |
492 | return error; | |
493 | ||
494 | error = slot_get(*qdp); | |
495 | if (error) | |
496 | goto fail; | |
497 | ||
498 | error = bh_get(*qdp); | |
499 | if (error) | |
500 | goto fail_slot; | |
501 | ||
502 | return 0; | |
503 | ||
a91ea69f | 504 | fail_slot: |
b3b94faa | 505 | slot_put(*qdp); |
a91ea69f | 506 | fail: |
b3b94faa DT |
507 | qd_put(*qdp); |
508 | return error; | |
509 | } | |
510 | ||
511 | static void qdsb_put(struct gfs2_quota_data *qd) | |
512 | { | |
513 | bh_put(qd); | |
514 | slot_put(qd); | |
515 | qd_put(qd); | |
516 | } | |
517 | ||
7c06b5d6 | 518 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 519 | { |
feaa7bba | 520 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 521 | struct gfs2_quota_data **qd; |
b3b94faa DT |
522 | int error; |
523 | ||
aaaf68c5 AP |
524 | if (ip->i_res == NULL) { |
525 | error = gfs2_rs_alloc(ip); | |
526 | if (error) | |
527 | return error; | |
528 | } | |
5407e242 BP |
529 | |
530 | qd = ip->i_res->rs_qa_qd; | |
531 | ||
532 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
533 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
534 | return -EIO; | |
535 | ||
536 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
537 | return 0; | |
538 | ||
b59c8b6f | 539 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
540 | if (error) |
541 | goto out; | |
5407e242 | 542 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
543 | qd++; |
544 | ||
b59c8b6f | 545 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
546 | if (error) |
547 | goto out; | |
5407e242 | 548 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
549 | qd++; |
550 | ||
6b24c0d2 EB |
551 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
552 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 553 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
554 | if (error) |
555 | goto out; | |
5407e242 | 556 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
557 | qd++; |
558 | } | |
559 | ||
6b24c0d2 EB |
560 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
561 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 562 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
563 | if (error) |
564 | goto out; | |
5407e242 | 565 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
566 | qd++; |
567 | } | |
568 | ||
a91ea69f | 569 | out: |
b3b94faa DT |
570 | if (error) |
571 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
572 | return error; |
573 | } | |
574 | ||
575 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
576 | { | |
feaa7bba | 577 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
578 | unsigned int x; |
579 | ||
5407e242 BP |
580 | if (ip->i_res == NULL) |
581 | return; | |
b3b94faa DT |
582 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
583 | ||
5407e242 BP |
584 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
585 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
586 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 587 | } |
5407e242 | 588 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
589 | } |
590 | ||
591 | static int sort_qd(const void *a, const void *b) | |
592 | { | |
48fac179 SW |
593 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
594 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 595 | |
05e0a60d | 596 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 597 | return -1; |
05e0a60d | 598 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 599 | return 1; |
48fac179 | 600 | return 0; |
b3b94faa DT |
601 | } |
602 | ||
cd915493 | 603 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
604 | { |
605 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 606 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 607 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 608 | s64 x; |
b3b94faa | 609 | |
f55ab26a | 610 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 611 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
612 | |
613 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
614 | qc->qc_change = 0; | |
615 | qc->qc_flags = 0; | |
05e0a60d | 616 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 617 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 618 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
619 | } |
620 | ||
b44b84d7 | 621 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
622 | qc->qc_change = cpu_to_be64(x); |
623 | ||
7d80823e | 624 | spin_lock(&qd_lock); |
b3b94faa | 625 | qd->qd_change = x; |
7d80823e | 626 | spin_unlock(&qd_lock); |
b3b94faa DT |
627 | |
628 | if (!x) { | |
629 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
630 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
631 | qc->qc_flags = 0; | |
632 | qc->qc_id = 0; | |
633 | slot_put(qd); | |
634 | qd_put(qd); | |
635 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
636 | qd_hold(qd); | |
637 | slot_hold(qd); | |
638 | } | |
907b9bce | 639 | |
f55ab26a | 640 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
641 | } |
642 | ||
18ec7d5c | 643 | /** |
1e72c0f7 SW |
644 | * gfs2_adjust_quota - adjust record of current block usage |
645 | * @ip: The quota inode | |
646 | * @loc: Offset of the entry in the quota file | |
e285c100 | 647 | * @change: The amount of usage change to record |
1e72c0f7 | 648 | * @qd: The quota data |
e285c100 | 649 | * @fdq: The updated limits to record |
18ec7d5c SW |
650 | * |
651 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
652 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
653 | * |
654 | * Returns: 0 or -ve on error | |
18ec7d5c | 655 | */ |
1e72c0f7 | 656 | |
18ec7d5c | 657 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
658 | s64 change, struct gfs2_quota_data *qd, |
659 | struct fs_disk_quota *fdq) | |
18ec7d5c | 660 | { |
feaa7bba | 661 | struct inode *inode = &ip->i_inode; |
14870b45 | 662 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
663 | struct address_space *mapping = inode->i_mapping; |
664 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 665 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 666 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 667 | struct buffer_head *bh; |
18ec7d5c | 668 | struct page *page; |
7e619bc3 AD |
669 | void *kaddr, *ptr; |
670 | struct gfs2_quota q, *qp; | |
671 | int err, nbytes; | |
e285c100 | 672 | u64 size; |
18ec7d5c | 673 | |
891a8e93 SW |
674 | if (gfs2_is_stuffed(ip)) { |
675 | err = gfs2_unstuff_dinode(ip, NULL); | |
676 | if (err) | |
677 | return err; | |
678 | } | |
7e619bc3 AD |
679 | |
680 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 681 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
682 | if (err < 0) |
683 | return err; | |
684 | ||
685 | err = -EIO; | |
686 | qp = &q; | |
687 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
688 | qp->qu_value += change; | |
689 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
690 | qd->qd_qb.qb_value = qp->qu_value; | |
691 | if (fdq) { | |
692 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 693 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
694 | qd->qd_qb.qb_warn = qp->qu_warn; |
695 | } | |
696 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 697 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
698 | qd->qd_qb.qb_limit = qp->qu_limit; |
699 | } | |
802ec9b6 AD |
700 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
701 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
702 | qd->qd_qb.qb_value = qp->qu_value; | |
703 | } | |
7e619bc3 AD |
704 | } |
705 | ||
706 | /* Write the quota into the quota file on disk */ | |
707 | ptr = qp; | |
708 | nbytes = sizeof(struct gfs2_quota); | |
709 | get_a_page: | |
220cca2a | 710 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
711 | if (!page) |
712 | return -ENOMEM; | |
713 | ||
714 | blocksize = inode->i_sb->s_blocksize; | |
715 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
716 | ||
717 | if (!page_has_buffers(page)) | |
718 | create_empty_buffers(page, blocksize, 0); | |
719 | ||
720 | bh = page_buffers(page); | |
721 | pos = blocksize; | |
722 | while (offset >= pos) { | |
723 | bh = bh->b_this_page; | |
724 | iblock++; | |
725 | pos += blocksize; | |
726 | } | |
727 | ||
728 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 729 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 730 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
731 | goto unlock_out; |
732 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
733 | if (buffer_new(bh)) |
734 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
735 | } |
736 | ||
737 | if (PageUptodate(page)) | |
738 | set_buffer_uptodate(bh); | |
739 | ||
740 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 741 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
742 | wait_on_buffer(bh); |
743 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 744 | goto unlock_out; |
18ec7d5c SW |
745 | } |
746 | ||
37f71577 | 747 | gfs2_trans_add_data(ip->i_gl, bh); |
18ec7d5c | 748 | |
d9349285 | 749 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
750 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
751 | nbytes = PAGE_CACHE_SIZE - offset; | |
752 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 753 | flush_dcache_page(page); |
d9349285 | 754 | kunmap_atomic(kaddr); |
7e619bc3 AD |
755 | unlock_page(page); |
756 | page_cache_release(page); | |
757 | ||
758 | /* If quota straddles page boundary, we need to update the rest of the | |
759 | * quota at the beginning of the next page */ | |
8b421601 | 760 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
761 | ptr = ptr + nbytes; |
762 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
763 | offset = 0; | |
764 | index++; | |
765 | goto get_a_page; | |
766 | } | |
e285c100 | 767 | |
e285c100 | 768 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 769 | if (size > inode->i_size) |
e285c100 | 770 | i_size_write(inode, size); |
e285c100 | 771 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 772 | mark_inode_dirty(inode); |
500242ac | 773 | return 0; |
ab9bbda0 | 774 | |
7e619bc3 | 775 | unlock_out: |
18ec7d5c SW |
776 | unlock_page(page); |
777 | page_cache_release(page); | |
778 | return err; | |
779 | } | |
780 | ||
b3b94faa DT |
781 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
782 | { | |
783 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 784 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 785 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
786 | unsigned int data_blocks, ind_blocks; |
787 | struct gfs2_holder *ghs, i_gh; | |
788 | unsigned int qx, x; | |
789 | struct gfs2_quota_data *qd; | |
71f890f7 | 790 | unsigned reserved; |
f42faf4f | 791 | loff_t offset; |
20b95bf2 | 792 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
793 | int error; |
794 | ||
0a305e49 BP |
795 | error = gfs2_rs_alloc(ip); |
796 | if (error) | |
797 | return error; | |
798 | ||
b3b94faa DT |
799 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
800 | &data_blocks, &ind_blocks); | |
801 | ||
16c5f06f | 802 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
803 | if (!ghs) |
804 | return -ENOMEM; | |
805 | ||
806 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 807 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 808 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 809 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
810 | GL_NOCACHE, &ghs[qx]); |
811 | if (error) | |
812 | goto out; | |
813 | } | |
814 | ||
815 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
816 | if (error) | |
817 | goto out; | |
818 | ||
819 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 820 | offset = qd2offset(qda[x]); |
461cb419 BP |
821 | if (gfs2_write_alloc_required(ip, offset, |
822 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
823 | nalloc++; |
824 | } | |
825 | ||
20b95bf2 AD |
826 | /* |
827 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
828 | * block to the reservation unconditionally. If the inode | |
829 | * doesn't need unstuffing, the block will be released to the | |
830 | * rgrp since it won't be allocated during the transaction | |
831 | */ | |
7e619bc3 AD |
832 | /* +3 in the end for unstuffing block, inode size update block |
833 | * and another block in case quota straddles page boundary and | |
834 | * two blocks need to be updated instead of 1 */ | |
835 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 836 | |
71f890f7 | 837 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
838 | ap.target = reserved; |
839 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
840 | if (error) |
841 | goto out_alloc; | |
b3b94faa | 842 | |
20b95bf2 | 843 | if (nalloc) |
71f890f7 | 844 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
845 | |
846 | error = gfs2_trans_begin(sdp, blocks, 0); | |
847 | if (error) | |
848 | goto out_ipres; | |
b3b94faa DT |
849 | |
850 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
851 | qd = qda[x]; |
852 | offset = qd2offset(qd); | |
e285c100 | 853 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 854 | if (error) |
b3b94faa | 855 | goto out_end_trans; |
b3b94faa DT |
856 | |
857 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 858 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
859 | } |
860 | ||
861 | error = 0; | |
862 | ||
a91ea69f | 863 | out_end_trans: |
b3b94faa | 864 | gfs2_trans_end(sdp); |
a91ea69f | 865 | out_ipres: |
20b95bf2 | 866 | gfs2_inplace_release(ip); |
a91ea69f | 867 | out_alloc: |
b3b94faa | 868 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 869 | out: |
b3b94faa DT |
870 | while (qx--) |
871 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 872 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 873 | kfree(ghs); |
b09e593d | 874 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
875 | return error; |
876 | } | |
877 | ||
e285c100 SW |
878 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
879 | { | |
880 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
881 | struct gfs2_quota q; | |
882 | struct gfs2_quota_lvb *qlvb; | |
883 | loff_t pos; | |
884 | int error; | |
885 | ||
886 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
887 | pos = qd2offset(qd); | |
4306629e | 888 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
889 | if (error < 0) |
890 | return error; | |
891 | ||
4e2f8849 | 892 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
893 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
894 | qlvb->__pad = 0; | |
895 | qlvb->qb_limit = q.qu_limit; | |
896 | qlvb->qb_warn = q.qu_warn; | |
897 | qlvb->qb_value = q.qu_value; | |
898 | qd->qd_qb = *qlvb; | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
b3b94faa DT |
903 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
904 | struct gfs2_holder *q_gh) | |
905 | { | |
906 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 907 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 908 | struct gfs2_holder i_gh; |
b3b94faa DT |
909 | int error; |
910 | ||
a91ea69f | 911 | restart: |
b3b94faa DT |
912 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
913 | if (error) | |
914 | return error; | |
915 | ||
4e2f8849 | 916 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 917 | |
e9fc2aa0 | 918 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 919 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
920 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
921 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
922 | if (error) |
923 | return error; | |
924 | ||
e9fc2aa0 | 925 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
926 | if (error) |
927 | goto fail; | |
928 | ||
e285c100 SW |
929 | error = update_qd(sdp, qd); |
930 | if (error) | |
1e72c0f7 | 931 | goto fail_gunlock; |
b3b94faa | 932 | |
e285c100 | 933 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
934 | gfs2_glock_dq_uninit(q_gh); |
935 | force_refresh = 0; | |
936 | goto restart; | |
b3b94faa DT |
937 | } |
938 | ||
939 | return 0; | |
940 | ||
a91ea69f | 941 | fail_gunlock: |
b3b94faa | 942 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 943 | fail: |
b3b94faa | 944 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
945 | return error; |
946 | } | |
947 | ||
7c06b5d6 | 948 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 949 | { |
feaa7bba | 950 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 951 | struct gfs2_quota_data *qd; |
b3b94faa DT |
952 | unsigned int x; |
953 | int error = 0; | |
954 | ||
891a8e93 SW |
955 | error = gfs2_quota_hold(ip, uid, gid); |
956 | if (error) | |
957 | return error; | |
b3b94faa DT |
958 | |
959 | if (capable(CAP_SYS_RESOURCE) || | |
960 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
961 | return 0; | |
962 | ||
5407e242 BP |
963 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
964 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 965 | |
5407e242 | 966 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 967 | int force = NO_FORCE; |
5407e242 | 968 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
969 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
970 | force = FORCE; | |
5407e242 | 971 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
972 | if (error) |
973 | break; | |
974 | } | |
975 | ||
976 | if (!error) | |
977 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
978 | else { | |
979 | while (x--) | |
5407e242 | 980 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
981 | gfs2_quota_unhold(ip); |
982 | } | |
983 | ||
984 | return error; | |
985 | } | |
986 | ||
987 | static int need_sync(struct gfs2_quota_data *qd) | |
988 | { | |
989 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
990 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 991 | s64 value; |
b3b94faa DT |
992 | unsigned int num, den; |
993 | int do_sync = 1; | |
994 | ||
995 | if (!qd->qd_qb.qb_limit) | |
996 | return 0; | |
997 | ||
7d80823e | 998 | spin_lock(&qd_lock); |
b3b94faa | 999 | value = qd->qd_change; |
7d80823e | 1000 | spin_unlock(&qd_lock); |
b3b94faa DT |
1001 | |
1002 | spin_lock(>->gt_spin); | |
1003 | num = gt->gt_quota_scale_num; | |
1004 | den = gt->gt_quota_scale_den; | |
1005 | spin_unlock(>->gt_spin); | |
1006 | ||
1007 | if (value < 0) | |
1008 | do_sync = 0; | |
e9fc2aa0 SW |
1009 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1010 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1011 | do_sync = 0; |
1012 | else { | |
1013 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1014 | value = div_s64(value, den); |
e9fc2aa0 | 1015 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1016 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1017 | do_sync = 0; |
1018 | } | |
1019 | ||
1020 | return do_sync; | |
1021 | } | |
1022 | ||
1023 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1024 | { | |
aabd7c72 | 1025 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1026 | struct gfs2_quota_data *qda[4]; |
1027 | unsigned int count = 0; | |
1028 | unsigned int x; | |
aabd7c72 | 1029 | int found; |
b3b94faa DT |
1030 | |
1031 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1032 | goto out; | |
1033 | ||
5407e242 | 1034 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1035 | struct gfs2_quota_data *qd; |
1036 | int sync; | |
1037 | ||
5407e242 | 1038 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1039 | sync = need_sync(qd); |
1040 | ||
5407e242 | 1041 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
aabd7c72 SW |
1042 | if (!sync) |
1043 | continue; | |
1044 | ||
7d80823e | 1045 | spin_lock(&qd_lock); |
aabd7c72 | 1046 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1047 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1048 | |
1049 | if (!found) | |
1050 | continue; | |
1051 | ||
1052 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1053 | if (bh_get(qd)) { | |
1054 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1055 | slot_put(qd); | |
1056 | qd_put(qd); | |
1057 | continue; | |
1058 | } | |
b3b94faa | 1059 | |
aabd7c72 | 1060 | qda[count++] = qd; |
b3b94faa DT |
1061 | } |
1062 | ||
1063 | if (count) { | |
1064 | do_sync(count, qda); | |
1065 | for (x = 0; x < count; x++) | |
1066 | qd_unlock(qda[x]); | |
1067 | } | |
1068 | ||
a91ea69f | 1069 | out: |
b3b94faa DT |
1070 | gfs2_quota_unhold(ip); |
1071 | } | |
1072 | ||
1073 | #define MAX_LINE 256 | |
1074 | ||
1075 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1076 | { | |
1077 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1078 | |
2ec46505 | 1079 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 | 1080 | sdp->sd_fsname, type, |
05e0a60d EB |
1081 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1082 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1083 | |
1084 | return 0; | |
1085 | } | |
1086 | ||
7c06b5d6 | 1087 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1088 | { |
feaa7bba | 1089 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1090 | struct gfs2_quota_data *qd; |
cd915493 | 1091 | s64 value; |
b3b94faa DT |
1092 | unsigned int x; |
1093 | int error = 0; | |
1094 | ||
1095 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1096 | return 0; | |
1097 | ||
1098 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1099 | return 0; | |
1100 | ||
5407e242 BP |
1101 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1102 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1103 | |
05e0a60d EB |
1104 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1105 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1106 | continue; |
1107 | ||
e9fc2aa0 | 1108 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1109 | spin_lock(&qd_lock); |
b3b94faa | 1110 | value += qd->qd_change; |
7d80823e | 1111 | spin_unlock(&qd_lock); |
b3b94faa | 1112 | |
cd915493 | 1113 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1114 | print_message(qd, "exceeded"); |
05e0a60d | 1115 | quota_send_warning(qd->qd_id, |
2ec46505 SW |
1116 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1117 | ||
b3b94faa DT |
1118 | error = -EDQUOT; |
1119 | break; | |
e9fc2aa0 | 1120 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1121 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1122 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1123 | gfs2_tune_get(sdp, |
1124 | gt_quota_warn_period) * HZ)) { | |
05e0a60d | 1125 | quota_send_warning(qd->qd_id, |
2ec46505 | 1126 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1127 | error = print_message(qd, "warning"); |
1128 | qd->qd_last_warn = jiffies; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | return error; | |
1133 | } | |
1134 | ||
cd915493 | 1135 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1136 | kuid_t uid, kgid_t gid) |
b3b94faa | 1137 | { |
b3b94faa DT |
1138 | struct gfs2_quota_data *qd; |
1139 | unsigned int x; | |
b3b94faa | 1140 | |
feaa7bba | 1141 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1142 | return; |
383f01fb | 1143 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1144 | return; |
1145 | ||
5407e242 BP |
1146 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1147 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1148 | |
05e0a60d EB |
1149 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1150 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1151 | do_qc(qd, change); |
b3b94faa DT |
1152 | } |
1153 | } | |
1154 | } | |
1155 | ||
ceed1723 | 1156 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1157 | { |
8c42d637 | 1158 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1159 | struct gfs2_quota_data **qda; |
bef292a7 | 1160 | unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder); |
b3b94faa DT |
1161 | unsigned int num_qd; |
1162 | unsigned int x; | |
1163 | int error = 0; | |
1164 | ||
b3b94faa DT |
1165 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1166 | if (!qda) | |
1167 | return -ENOMEM; | |
1168 | ||
e46c772d SW |
1169 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1170 | sdp->sd_quota_sync_gen++; | |
1171 | ||
b3b94faa DT |
1172 | do { |
1173 | num_qd = 0; | |
1174 | ||
1175 | for (;;) { | |
1176 | error = qd_fish(sdp, qda + num_qd); | |
1177 | if (error || !qda[num_qd]) | |
1178 | break; | |
1179 | if (++num_qd == max_qd) | |
1180 | break; | |
1181 | } | |
1182 | ||
1183 | if (num_qd) { | |
1184 | if (!error) | |
1185 | error = do_sync(num_qd, qda); | |
1186 | if (!error) | |
1187 | for (x = 0; x < num_qd; x++) | |
1188 | qda[x]->qd_sync_gen = | |
1189 | sdp->sd_quota_sync_gen; | |
1190 | ||
1191 | for (x = 0; x < num_qd; x++) | |
1192 | qd_unlock(qda[x]); | |
1193 | } | |
1194 | } while (!error && num_qd == max_qd); | |
1195 | ||
e46c772d | 1196 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1197 | kfree(qda); |
1198 | ||
1199 | return error; | |
1200 | } | |
1201 | ||
ed87dabc | 1202 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1203 | { |
1204 | struct gfs2_quota_data *qd; | |
1205 | struct gfs2_holder q_gh; | |
1206 | int error; | |
1207 | ||
05e0a60d | 1208 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1209 | if (error) |
1210 | return error; | |
1211 | ||
1212 | error = do_glock(qd, FORCE, &q_gh); | |
1213 | if (!error) | |
1214 | gfs2_glock_dq_uninit(&q_gh); | |
1215 | ||
1216 | qd_put(qd); | |
b3b94faa DT |
1217 | return error; |
1218 | } | |
1219 | ||
bb8d8a6f SW |
1220 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1221 | { | |
1222 | const struct gfs2_quota_change *str = buf; | |
1223 | ||
1224 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1225 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
e08d8d7f EB |
1226 | qc->qc_id = make_kqid(&init_user_ns, |
1227 | (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA, | |
1228 | be32_to_cpu(str->qc_id)); | |
bb8d8a6f SW |
1229 | } |
1230 | ||
b3b94faa DT |
1231 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1232 | { | |
feaa7bba | 1233 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1234 | u64 size = i_size_read(sdp->sd_qc_inode); |
1235 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1236 | unsigned int x, slot = 0; |
1237 | unsigned int found = 0; | |
cd915493 SW |
1238 | u64 dblock; |
1239 | u32 extlen = 0; | |
b3b94faa DT |
1240 | int error; |
1241 | ||
a2e0f799 | 1242 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1243 | return -EIO; |
a2e0f799 | 1244 | |
b3b94faa | 1245 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
5c676f6d | 1246 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1247 | |
1248 | error = -ENOMEM; | |
1249 | ||
1250 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1251 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1252 | if (!sdp->sd_quota_bitmap) |
1253 | return error; | |
1254 | ||
1255 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1256 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1257 | if (!sdp->sd_quota_bitmap[x]) |
1258 | goto fail; | |
1259 | } | |
1260 | ||
1261 | for (x = 0; x < blocks; x++) { | |
1262 | struct buffer_head *bh; | |
1263 | unsigned int y; | |
1264 | ||
1265 | if (!extlen) { | |
1266 | int new = 0; | |
feaa7bba | 1267 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1268 | if (error) |
1269 | goto fail; | |
1270 | } | |
b3b94faa | 1271 | error = -EIO; |
7276b3b0 SW |
1272 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1273 | if (!bh) | |
1274 | goto fail; | |
b3b94faa DT |
1275 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1276 | brelse(bh); | |
1277 | goto fail; | |
1278 | } | |
1279 | ||
7276b3b0 | 1280 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1281 | y++, slot++) { |
b62f963e | 1282 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1283 | struct gfs2_quota_data *qd; |
1284 | ||
1285 | gfs2_quota_change_in(&qc, bh->b_data + | |
1286 | sizeof(struct gfs2_meta_header) + | |
1287 | y * sizeof(struct gfs2_quota_change)); | |
1288 | if (!qc.qc_change) | |
1289 | continue; | |
1290 | ||
05e0a60d | 1291 | error = qd_alloc(sdp, qc.qc_id, &qd); |
b3b94faa DT |
1292 | if (error) { |
1293 | brelse(bh); | |
1294 | goto fail; | |
1295 | } | |
1296 | ||
1297 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1298 | qd->qd_change = qc.qc_change; | |
1299 | qd->qd_slot = slot; | |
1300 | qd->qd_slot_count = 1; | |
b3b94faa | 1301 | |
7d80823e | 1302 | spin_lock(&qd_lock); |
b3b94faa DT |
1303 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1304 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1305 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1306 | spin_unlock(&qd_lock); |
b3b94faa DT |
1307 | |
1308 | found++; | |
1309 | } | |
1310 | ||
1311 | brelse(bh); | |
1312 | dblock++; | |
1313 | extlen--; | |
1314 | } | |
1315 | ||
1316 | if (found) | |
1317 | fs_info(sdp, "found %u quota changes\n", found); | |
1318 | ||
1319 | return 0; | |
1320 | ||
a91ea69f | 1321 | fail: |
b3b94faa DT |
1322 | gfs2_quota_cleanup(sdp); |
1323 | return error; | |
1324 | } | |
1325 | ||
b3b94faa DT |
1326 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1327 | { | |
1328 | struct list_head *head = &sdp->sd_quota_list; | |
1329 | struct gfs2_quota_data *qd; | |
1330 | unsigned int x; | |
1331 | ||
7d80823e | 1332 | spin_lock(&qd_lock); |
b3b94faa DT |
1333 | while (!list_empty(head)) { |
1334 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1335 | ||
9b9f039d SW |
1336 | /* |
1337 | * To be removed in due course... we should be able to | |
1338 | * ensure that all refs to the qd have done by this point | |
1339 | * so that this rather odd test is not required | |
1340 | */ | |
1341 | spin_lock(&qd->qd_lockref.lock); | |
1342 | if (qd->qd_lockref.count > 1 || | |
1343 | (qd->qd_lockref.count && !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
1344 | spin_unlock(&qd->qd_lockref.lock); | |
0a7ab79c | 1345 | list_move(&qd->qd_list, head); |
7d80823e | 1346 | spin_unlock(&qd_lock); |
b3b94faa | 1347 | schedule(); |
7d80823e | 1348 | spin_lock(&qd_lock); |
b3b94faa DT |
1349 | continue; |
1350 | } | |
9b9f039d | 1351 | spin_unlock(&qd->qd_lockref.lock); |
b3b94faa DT |
1352 | |
1353 | list_del(&qd->qd_list); | |
0a7ab79c | 1354 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1355 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1356 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1357 | spin_unlock(&qd_lock); |
b3b94faa | 1358 | |
9b9f039d | 1359 | if (!qd->qd_lockref.count) { |
b3b94faa DT |
1360 | gfs2_assert_warn(sdp, !qd->qd_change); |
1361 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1362 | } else | |
1363 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1364 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1365 | ||
f057f6cd | 1366 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1367 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1368 | |
7d80823e | 1369 | spin_lock(&qd_lock); |
b3b94faa | 1370 | } |
7d80823e | 1371 | spin_unlock(&qd_lock); |
b3b94faa DT |
1372 | |
1373 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1374 | ||
1375 | if (sdp->sd_quota_bitmap) { | |
1376 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1377 | kfree(sdp->sd_quota_bitmap[x]); | |
1378 | kfree(sdp->sd_quota_bitmap); | |
1379 | } | |
1380 | } | |
1381 | ||
37b2c837 SW |
1382 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1383 | { | |
1384 | if (error == 0 || error == -EROFS) | |
1385 | return; | |
1386 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1387 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1388 | } | |
1389 | ||
1390 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1391 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1392 | unsigned long t, unsigned long *timeo, |
1393 | unsigned int *new_timeo) | |
1394 | { | |
1395 | if (t >= *timeo) { | |
8c42d637 | 1396 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1397 | quotad_error(sdp, msg, error); |
1398 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1399 | } else { | |
1400 | *timeo -= t; | |
1401 | } | |
1402 | } | |
1403 | ||
813e0c46 SW |
1404 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1405 | { | |
1406 | struct gfs2_inode *ip; | |
1407 | ||
1408 | while(1) { | |
1409 | ip = NULL; | |
1410 | spin_lock(&sdp->sd_trunc_lock); | |
1411 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1412 | ip = list_entry(sdp->sd_trunc_list.next, | |
1413 | struct gfs2_inode, i_trunc_list); | |
1414 | list_del_init(&ip->i_trunc_list); | |
1415 | } | |
1416 | spin_unlock(&sdp->sd_trunc_lock); | |
1417 | if (ip == NULL) | |
1418 | return; | |
1419 | gfs2_glock_finish_truncate(ip); | |
1420 | } | |
1421 | } | |
1422 | ||
3d3c10f2 BM |
1423 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1424 | if (!sdp->sd_statfs_force_sync) { | |
1425 | sdp->sd_statfs_force_sync = 1; | |
1426 | wake_up(&sdp->sd_quota_wait); | |
1427 | } | |
1428 | } | |
1429 | ||
1430 | ||
37b2c837 SW |
1431 | /** |
1432 | * gfs2_quotad - Write cached quota changes into the quota file | |
1433 | * @sdp: Pointer to GFS2 superblock | |
1434 | * | |
1435 | */ | |
1436 | ||
1437 | int gfs2_quotad(void *data) | |
1438 | { | |
1439 | struct gfs2_sbd *sdp = data; | |
1440 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1441 | unsigned long statfs_timeo = 0; | |
1442 | unsigned long quotad_timeo = 0; | |
1443 | unsigned long t = 0; | |
1444 | DEFINE_WAIT(wait); | |
813e0c46 | 1445 | int empty; |
37b2c837 SW |
1446 | |
1447 | while (!kthread_should_stop()) { | |
1448 | ||
1449 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1450 | if (sdp->sd_statfs_force_sync) { |
1451 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1452 | quotad_error(sdp, "statfs", error); | |
1453 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1454 | } | |
1455 | else | |
1456 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1457 | &statfs_timeo, | |
1458 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1459 | |
1460 | /* Update quota file */ | |
edd2e9ac | 1461 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1462 | "ad_timeo, &tune->gt_quota_quantum); |
1463 | ||
813e0c46 SW |
1464 | /* Check for & recover partially truncated inodes */ |
1465 | quotad_check_trunc_list(sdp); | |
1466 | ||
a0acae0e TH |
1467 | try_to_freeze(); |
1468 | ||
37b2c837 SW |
1469 | t = min(quotad_timeo, statfs_timeo); |
1470 | ||
7fa5d20d | 1471 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1472 | spin_lock(&sdp->sd_trunc_lock); |
1473 | empty = list_empty(&sdp->sd_trunc_list); | |
1474 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1475 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1476 | t -= schedule_timeout(t); |
1477 | else | |
1478 | t = 0; | |
37b2c837 SW |
1479 | finish_wait(&sdp->sd_quota_wait, &wait); |
1480 | } | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
1d371b5e SW |
1485 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1486 | struct fs_quota_stat *fqs) | |
1487 | { | |
1488 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1489 | ||
1490 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1491 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1492 | |
1493 | switch (sdp->sd_args.ar_quota) { | |
1494 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1495 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1496 | /*FALLTHRU*/ |
1497 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1498 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1499 | break; |
1500 | case GFS2_QUOTA_OFF: | |
1501 | break; | |
1502 | } | |
1503 | ||
1d371b5e SW |
1504 | if (sdp->sd_quota_inode) { |
1505 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1506 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1507 | } | |
1508 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1509 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
2147dbfd | 1510 | fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru); |
1d371b5e SW |
1511 | return 0; |
1512 | } | |
1513 | ||
74a8a103 | 1514 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1515 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1516 | { |
1517 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1518 | struct gfs2_quota_lvb *qlvb; | |
1519 | struct gfs2_quota_data *qd; | |
1520 | struct gfs2_holder q_gh; | |
1521 | int error; | |
1522 | ||
1523 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1524 | ||
1525 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1526 | return -ESRCH; /* Crazy XFS error code */ | |
1527 | ||
236c64e4 EB |
1528 | if ((qid.type != USRQUOTA) && |
1529 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1530 | return -EINVAL; |
1531 | ||
05e0a60d | 1532 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1533 | if (error) |
1534 | return error; | |
1535 | error = do_glock(qd, FORCE, &q_gh); | |
1536 | if (error) | |
1537 | goto out; | |
1538 | ||
4e2f8849 | 1539 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1540 | fdq->d_version = FS_DQUOT_VERSION; |
236c64e4 | 1541 | fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1542 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1543 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1544 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1545 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1546 | |
1547 | gfs2_glock_dq_uninit(&q_gh); | |
1548 | out: | |
1549 | qd_put(qd); | |
1550 | return error; | |
1551 | } | |
1552 | ||
e285c100 | 1553 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1554 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1555 | |
74a8a103 | 1556 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1557 | struct fs_disk_quota *fdq) |
e285c100 SW |
1558 | { |
1559 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1560 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1561 | struct gfs2_quota_data *qd; | |
1562 | struct gfs2_holder q_gh, i_gh; | |
1563 | unsigned int data_blocks, ind_blocks; | |
1564 | unsigned int blocks = 0; | |
1565 | int alloc_required; | |
e285c100 SW |
1566 | loff_t offset; |
1567 | int error; | |
1568 | ||
1569 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1570 | return -ESRCH; /* Crazy XFS error code */ | |
1571 | ||
236c64e4 EB |
1572 | if ((qid.type != USRQUOTA) && |
1573 | (qid.type != GRPQUOTA)) | |
e285c100 | 1574 | return -EINVAL; |
e285c100 SW |
1575 | |
1576 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1577 | return -EINVAL; | |
e285c100 | 1578 | |
05e0a60d | 1579 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1580 | if (error) |
1581 | return error; | |
1582 | ||
0a305e49 BP |
1583 | error = gfs2_rs_alloc(ip); |
1584 | if (error) | |
1585 | goto out_put; | |
1586 | ||
e285c100 SW |
1587 | mutex_lock(&ip->i_inode.i_mutex); |
1588 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1589 | if (error) | |
0a305e49 | 1590 | goto out_unlockput; |
e285c100 SW |
1591 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1592 | if (error) | |
1593 | goto out_q; | |
1594 | ||
1595 | /* Check for existing entry, if none then alloc new blocks */ | |
1596 | error = update_qd(sdp, qd); | |
1597 | if (error) | |
1598 | goto out_i; | |
1599 | ||
1600 | /* If nothing has changed, this is a no-op */ | |
1601 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1602 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1603 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1604 | |
e285c100 | 1605 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1606 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1607 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1608 | |
1609 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1610 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1611 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1612 | ||
e285c100 SW |
1613 | if (fdq->d_fieldmask == 0) |
1614 | goto out_i; | |
1615 | ||
1616 | offset = qd2offset(qd); | |
461cb419 | 1617 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1618 | if (gfs2_is_stuffed(ip)) |
1619 | alloc_required = 1; | |
e285c100 | 1620 | if (alloc_required) { |
7b9cff46 | 1621 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1622 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1623 | &data_blocks, &ind_blocks); | |
564e12b1 | 1624 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1625 | ap.target = blocks; |
1626 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1627 | if (error) |
564e12b1 | 1628 | goto out_i; |
71f890f7 | 1629 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1630 | } |
1631 | ||
e79a46a0 AD |
1632 | /* Some quotas span block boundaries and can update two blocks, |
1633 | adding an extra block to the transaction to handle such quotas */ | |
1634 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1635 | if (error) |
1636 | goto out_release; | |
1637 | ||
1638 | /* Apply changes */ | |
1639 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1640 | ||
1641 | gfs2_trans_end(sdp); | |
1642 | out_release: | |
564e12b1 | 1643 | if (alloc_required) |
e285c100 | 1644 | gfs2_inplace_release(ip); |
e285c100 SW |
1645 | out_i: |
1646 | gfs2_glock_dq_uninit(&i_gh); | |
1647 | out_q: | |
1648 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1649 | out_unlockput: |
e285c100 | 1650 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1651 | out_put: |
e285c100 SW |
1652 | qd_put(qd); |
1653 | return error; | |
1654 | } | |
1655 | ||
cc632e7f SW |
1656 | const struct quotactl_ops gfs2_quotactl_ops = { |
1657 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1658 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1659 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1660 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1661 | }; |