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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 | ||
d77d1b58 JP |
39 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
40 | ||
b3b94faa DT |
41 | #include <linux/sched.h> |
42 | #include <linux/slab.h> | |
1495f230 | 43 | #include <linux/mm.h> |
b3b94faa DT |
44 | #include <linux/spinlock.h> |
45 | #include <linux/completion.h> | |
46 | #include <linux/buffer_head.h> | |
b3b94faa | 47 | #include <linux/sort.h> |
18ec7d5c | 48 | #include <linux/fs.h> |
2e565bb6 | 49 | #include <linux/bio.h> |
5c676f6d | 50 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
51 | #include <linux/kthread.h> |
52 | #include <linux/freezer.h> | |
2ec46505 | 53 | #include <linux/quota.h> |
1d371b5e | 54 | #include <linux/dqblk_xfs.h> |
9b9f039d | 55 | #include <linux/lockref.h> |
2147dbfd | 56 | #include <linux/list_lru.h> |
c754fbbb SW |
57 | #include <linux/rcupdate.h> |
58 | #include <linux/rculist_bl.h> | |
59 | #include <linux/bit_spinlock.h> | |
60 | #include <linux/jhash.h> | |
1e3d3620 | 61 | #include <linux/vmalloc.h> |
b3b94faa DT |
62 | |
63 | #include "gfs2.h" | |
5c676f6d | 64 | #include "incore.h" |
b3b94faa DT |
65 | #include "bmap.h" |
66 | #include "glock.h" | |
67 | #include "glops.h" | |
b3b94faa DT |
68 | #include "log.h" |
69 | #include "meta_io.h" | |
70 | #include "quota.h" | |
71 | #include "rgrp.h" | |
72 | #include "super.h" | |
73 | #include "trans.h" | |
18ec7d5c | 74 | #include "inode.h" |
5c676f6d | 75 | #include "util.h" |
b3b94faa | 76 | |
c754fbbb SW |
77 | #define GFS2_QD_HASH_SHIFT 12 |
78 | #define GFS2_QD_HASH_SIZE (1 << GFS2_QD_HASH_SHIFT) | |
79 | #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1) | |
80 | ||
81 | /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */ | |
2d9e7230 | 82 | /* -> sd_bitmap_lock */ |
7d80823e | 83 | static DEFINE_SPINLOCK(qd_lock); |
2147dbfd | 84 | struct list_lru gfs2_qd_lru; |
0a7ab79c | 85 | |
c754fbbb SW |
86 | static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE]; |
87 | ||
88 | static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp, | |
89 | const struct kqid qid) | |
90 | { | |
91 | unsigned int h; | |
92 | ||
93 | h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0); | |
94 | h = jhash(&qid, sizeof(struct kqid), h); | |
95 | ||
96 | return h & GFS2_QD_HASH_MASK; | |
97 | } | |
98 | ||
99 | static inline void spin_lock_bucket(unsigned int hash) | |
100 | { | |
101 | hlist_bl_lock(&qd_hash_table[hash]); | |
102 | } | |
103 | ||
104 | static inline void spin_unlock_bucket(unsigned int hash) | |
105 | { | |
106 | hlist_bl_unlock(&qd_hash_table[hash]); | |
107 | } | |
108 | ||
109 | static void gfs2_qd_dealloc(struct rcu_head *rcu) | |
110 | { | |
111 | struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu); | |
112 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
113 | } | |
114 | ||
2147dbfd | 115 | static void gfs2_qd_dispose(struct list_head *list) |
0a7ab79c AD |
116 | { |
117 | struct gfs2_quota_data *qd; | |
118 | struct gfs2_sbd *sdp; | |
0a7ab79c | 119 | |
2147dbfd SW |
120 | while (!list_empty(list)) { |
121 | qd = list_entry(list->next, struct gfs2_quota_data, qd_lru); | |
0a7ab79c AD |
122 | sdp = qd->qd_gl->gl_sbd; |
123 | ||
2147dbfd SW |
124 | list_del(&qd->qd_lru); |
125 | ||
0a7ab79c | 126 | /* Free from the filesystem-specific list */ |
2147dbfd | 127 | spin_lock(&qd_lock); |
0a7ab79c | 128 | list_del(&qd->qd_list); |
2147dbfd | 129 | spin_unlock(&qd_lock); |
0a7ab79c | 130 | |
c754fbbb SW |
131 | spin_lock_bucket(qd->qd_hash); |
132 | hlist_bl_del_rcu(&qd->qd_hlist); | |
133 | spin_unlock_bucket(qd->qd_hash); | |
134 | ||
0a7ab79c AD |
135 | gfs2_assert_warn(sdp, !qd->qd_change); |
136 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
137 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
138 | ||
f057f6cd | 139 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
140 | atomic_dec(&sdp->sd_quota_count); |
141 | ||
142 | /* Delete it from the common reclaim list */ | |
c754fbbb | 143 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
0a7ab79c | 144 | } |
2147dbfd SW |
145 | } |
146 | ||
147 | ||
3f97b163 VD |
148 | static enum lru_status gfs2_qd_isolate(struct list_head *item, |
149 | struct list_lru_one *lru, spinlock_t *lru_lock, void *arg) | |
2147dbfd SW |
150 | { |
151 | struct list_head *dispose = arg; | |
152 | struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru); | |
153 | ||
154 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
155 | return LRU_SKIP; | |
156 | ||
157 | if (qd->qd_lockref.count == 0) { | |
158 | lockref_mark_dead(&qd->qd_lockref); | |
3f97b163 | 159 | list_lru_isolate_move(lru, &qd->qd_lru, dispose); |
2147dbfd SW |
160 | } |
161 | ||
162 | spin_unlock(&qd->qd_lockref.lock); | |
163 | return LRU_REMOVED; | |
164 | } | |
165 | ||
166 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
167 | struct shrink_control *sc) | |
168 | { | |
169 | LIST_HEAD(dispose); | |
170 | unsigned long freed; | |
171 | ||
172 | if (!(sc->gfp_mask & __GFP_FS)) | |
173 | return SHRINK_STOP; | |
174 | ||
503c358c VD |
175 | freed = list_lru_shrink_walk(&gfs2_qd_lru, sc, |
176 | gfs2_qd_isolate, &dispose); | |
2147dbfd SW |
177 | |
178 | gfs2_qd_dispose(&dispose); | |
179 | ||
1ab6c499 DC |
180 | return freed; |
181 | } | |
0a7ab79c | 182 | |
2147dbfd SW |
183 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
184 | struct shrink_control *sc) | |
1ab6c499 | 185 | { |
503c358c | 186 | return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); |
0a7ab79c AD |
187 | } |
188 | ||
2147dbfd SW |
189 | struct shrinker gfs2_qd_shrinker = { |
190 | .count_objects = gfs2_qd_shrink_count, | |
191 | .scan_objects = gfs2_qd_shrink_scan, | |
192 | .seeks = DEFAULT_SEEKS, | |
193 | .flags = SHRINKER_NUMA_AWARE, | |
194 | }; | |
195 | ||
196 | ||
2f6c9896 EB |
197 | static u64 qd2index(struct gfs2_quota_data *qd) |
198 | { | |
05e0a60d EB |
199 | struct kqid qid = qd->qd_id; |
200 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 201 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
202 | } |
203 | ||
cd915493 | 204 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 205 | { |
cd915493 | 206 | u64 offset; |
b3b94faa | 207 | |
2f6c9896 | 208 | offset = qd2index(qd); |
b3b94faa DT |
209 | offset *= sizeof(struct gfs2_quota); |
210 | ||
211 | return offset; | |
212 | } | |
213 | ||
c754fbbb | 214 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
215 | { |
216 | struct gfs2_quota_data *qd; | |
217 | int error; | |
218 | ||
37b2c837 | 219 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 220 | if (!qd) |
c754fbbb | 221 | return NULL; |
b3b94faa | 222 | |
c754fbbb | 223 | qd->qd_sbd = sdp; |
9b9f039d SW |
224 | qd->qd_lockref.count = 1; |
225 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 226 | qd->qd_id = qid; |
b3b94faa | 227 | qd->qd_slot = -1; |
2147dbfd | 228 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 229 | qd->qd_hash = hash; |
b3b94faa | 230 | |
2f6c9896 | 231 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
232 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
233 | if (error) | |
234 | goto fail; | |
235 | ||
c754fbbb | 236 | return qd; |
b3b94faa | 237 | |
a91ea69f | 238 | fail: |
37b2c837 | 239 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 240 | return NULL; |
b3b94faa DT |
241 | } |
242 | ||
c754fbbb SW |
243 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
244 | const struct gfs2_sbd *sdp, | |
245 | struct kqid qid) | |
b3b94faa | 246 | { |
c754fbbb SW |
247 | struct gfs2_quota_data *qd; |
248 | struct hlist_bl_node *h; | |
b3b94faa | 249 | |
c754fbbb SW |
250 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
251 | if (!qid_eq(qd->qd_id, qid)) | |
252 | continue; | |
253 | if (qd->qd_sbd != sdp) | |
254 | continue; | |
255 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
256 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
257 | return qd; | |
b3b94faa | 258 | } |
c754fbbb | 259 | } |
b3b94faa | 260 | |
c754fbbb SW |
261 | return NULL; |
262 | } | |
b3b94faa | 263 | |
b3b94faa | 264 | |
c754fbbb SW |
265 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
266 | struct gfs2_quota_data **qdp) | |
267 | { | |
268 | struct gfs2_quota_data *qd, *new_qd; | |
269 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 270 | |
c754fbbb SW |
271 | rcu_read_lock(); |
272 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
273 | rcu_read_unlock(); | |
b3b94faa | 274 | |
c754fbbb SW |
275 | if (qd) |
276 | return 0; | |
277 | ||
278 | new_qd = qd_alloc(hash, sdp, qid); | |
279 | if (!new_qd) | |
280 | return -ENOMEM; | |
281 | ||
282 | spin_lock(&qd_lock); | |
283 | spin_lock_bucket(hash); | |
284 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
285 | if (qd == NULL) { | |
286 | *qdp = new_qd; | |
287 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
288 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
289 | atomic_inc(&sdp->sd_quota_count); | |
290 | } | |
291 | spin_unlock_bucket(hash); | |
292 | spin_unlock(&qd_lock); | |
293 | ||
294 | if (qd) { | |
295 | gfs2_glock_put(new_qd->qd_gl); | |
296 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 297 | } |
c754fbbb SW |
298 | |
299 | return 0; | |
b3b94faa DT |
300 | } |
301 | ||
c754fbbb | 302 | |
b3b94faa DT |
303 | static void qd_hold(struct gfs2_quota_data *qd) |
304 | { | |
305 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
9b9f039d SW |
306 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
307 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
308 | } |
309 | ||
310 | static void qd_put(struct gfs2_quota_data *qd) | |
311 | { | |
2147dbfd SW |
312 | if (lockref_put_or_lock(&qd->qd_lockref)) |
313 | return; | |
9b9f039d | 314 | |
2147dbfd SW |
315 | qd->qd_lockref.count = 0; |
316 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
317 | spin_unlock(&qd->qd_lockref.lock); | |
9b9f039d | 318 | |
b3b94faa DT |
319 | } |
320 | ||
321 | static int slot_get(struct gfs2_quota_data *qd) | |
322 | { | |
ee2411a8 SW |
323 | struct gfs2_sbd *sdp = qd->qd_sbd; |
324 | unsigned int bit; | |
325 | int error = 0; | |
b3b94faa | 326 | |
2d9e7230 | 327 | spin_lock(&sdp->sd_bitmap_lock); |
ee2411a8 SW |
328 | if (qd->qd_slot_count != 0) |
329 | goto out; | |
b3b94faa | 330 | |
ee2411a8 SW |
331 | error = -ENOSPC; |
332 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots); | |
333 | if (bit < sdp->sd_quota_slots) { | |
334 | set_bit(bit, sdp->sd_quota_bitmap); | |
335 | qd->qd_slot = bit; | |
e9fb7c73 | 336 | error = 0; |
ee2411a8 SW |
337 | out: |
338 | qd->qd_slot_count++; | |
b3b94faa | 339 | } |
2d9e7230 | 340 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa | 341 | |
ee2411a8 | 342 | return error; |
b3b94faa DT |
343 | } |
344 | ||
345 | static void slot_hold(struct gfs2_quota_data *qd) | |
346 | { | |
ee2411a8 | 347 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 348 | |
2d9e7230 | 349 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
350 | gfs2_assert(sdp, qd->qd_slot_count); |
351 | qd->qd_slot_count++; | |
2d9e7230 | 352 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
353 | } |
354 | ||
355 | static void slot_put(struct gfs2_quota_data *qd) | |
356 | { | |
ee2411a8 | 357 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 358 | |
2d9e7230 | 359 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
360 | gfs2_assert(sdp, qd->qd_slot_count); |
361 | if (!--qd->qd_slot_count) { | |
ee2411a8 | 362 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
363 | qd->qd_slot = -1; |
364 | } | |
2d9e7230 | 365 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
366 | } |
367 | ||
368 | static int bh_get(struct gfs2_quota_data *qd) | |
369 | { | |
370 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 371 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 372 | unsigned int block, offset; |
b3b94faa DT |
373 | struct buffer_head *bh; |
374 | int error; | |
23591256 | 375 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 376 | |
f55ab26a | 377 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
378 | |
379 | if (qd->qd_bh_count++) { | |
f55ab26a | 380 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
381 | return 0; |
382 | } | |
383 | ||
384 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 385 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 386 | |
23591256 | 387 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 388 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
389 | if (error) |
390 | goto fail; | |
7276b3b0 | 391 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
392 | if (error) |
393 | goto fail; | |
394 | error = -EIO; | |
395 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
396 | goto fail_brelse; | |
397 | ||
398 | qd->qd_bh = bh; | |
399 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
400 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
401 | offset * sizeof(struct gfs2_quota_change)); | |
402 | ||
2e95b665 | 403 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
404 | |
405 | return 0; | |
406 | ||
a91ea69f | 407 | fail_brelse: |
b3b94faa | 408 | brelse(bh); |
a91ea69f | 409 | fail: |
b3b94faa | 410 | qd->qd_bh_count--; |
f55ab26a | 411 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
412 | return error; |
413 | } | |
414 | ||
415 | static void bh_put(struct gfs2_quota_data *qd) | |
416 | { | |
417 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
418 | ||
f55ab26a | 419 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
420 | gfs2_assert(sdp, qd->qd_bh_count); |
421 | if (!--qd->qd_bh_count) { | |
422 | brelse(qd->qd_bh); | |
423 | qd->qd_bh = NULL; | |
424 | qd->qd_bh_qc = NULL; | |
425 | } | |
f55ab26a | 426 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
427 | } |
428 | ||
1bf59bf6 SW |
429 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
430 | u64 *sync_gen) | |
431 | { | |
432 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
433 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
434 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
435 | return 0; | |
436 | ||
2147dbfd SW |
437 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
438 | return 0; | |
1bf59bf6 | 439 | |
2147dbfd | 440 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 441 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 442 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 443 | slot_hold(qd); |
1bf59bf6 SW |
444 | return 1; |
445 | } | |
446 | ||
b3b94faa DT |
447 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
448 | { | |
449 | struct gfs2_quota_data *qd = NULL; | |
450 | int error; | |
451 | int found = 0; | |
452 | ||
453 | *qdp = NULL; | |
454 | ||
455 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
456 | return 0; | |
457 | ||
7d80823e | 458 | spin_lock(&qd_lock); |
b3b94faa DT |
459 | |
460 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
461 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
462 | if (found) | |
463 | break; | |
b3b94faa DT |
464 | } |
465 | ||
466 | if (!found) | |
467 | qd = NULL; | |
468 | ||
7d80823e | 469 | spin_unlock(&qd_lock); |
b3b94faa DT |
470 | |
471 | if (qd) { | |
472 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
473 | error = bh_get(qd); | |
474 | if (error) { | |
475 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
476 | slot_put(qd); | |
477 | qd_put(qd); | |
478 | return error; | |
479 | } | |
480 | } | |
481 | ||
482 | *qdp = qd; | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
b3b94faa DT |
487 | static void qd_unlock(struct gfs2_quota_data *qd) |
488 | { | |
568f4c96 SW |
489 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
490 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
491 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
492 | bh_put(qd); | |
493 | slot_put(qd); | |
494 | qd_put(qd); | |
495 | } | |
496 | ||
b59c8b6f | 497 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
498 | struct gfs2_quota_data **qdp) |
499 | { | |
500 | int error; | |
501 | ||
05e0a60d | 502 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
503 | if (error) |
504 | return error; | |
505 | ||
506 | error = slot_get(*qdp); | |
507 | if (error) | |
508 | goto fail; | |
509 | ||
510 | error = bh_get(*qdp); | |
511 | if (error) | |
512 | goto fail_slot; | |
513 | ||
514 | return 0; | |
515 | ||
a91ea69f | 516 | fail_slot: |
b3b94faa | 517 | slot_put(*qdp); |
a91ea69f | 518 | fail: |
b3b94faa DT |
519 | qd_put(*qdp); |
520 | return error; | |
521 | } | |
522 | ||
523 | static void qdsb_put(struct gfs2_quota_data *qd) | |
524 | { | |
525 | bh_put(qd); | |
526 | slot_put(qd); | |
527 | qd_put(qd); | |
528 | } | |
529 | ||
7c06b5d6 | 530 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 531 | { |
feaa7bba | 532 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 533 | struct gfs2_quota_data **qd; |
b3b94faa DT |
534 | int error; |
535 | ||
aaaf68c5 AP |
536 | if (ip->i_res == NULL) { |
537 | error = gfs2_rs_alloc(ip); | |
538 | if (error) | |
539 | return error; | |
540 | } | |
5407e242 BP |
541 | |
542 | qd = ip->i_res->rs_qa_qd; | |
543 | ||
544 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
545 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
546 | return -EIO; | |
547 | ||
548 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
549 | return 0; | |
550 | ||
b59c8b6f | 551 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
552 | if (error) |
553 | goto out; | |
5407e242 | 554 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
555 | qd++; |
556 | ||
b59c8b6f | 557 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
558 | if (error) |
559 | goto out; | |
5407e242 | 560 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
561 | qd++; |
562 | ||
6b24c0d2 EB |
563 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
564 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 565 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
566 | if (error) |
567 | goto out; | |
5407e242 | 568 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
569 | qd++; |
570 | } | |
571 | ||
6b24c0d2 EB |
572 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
573 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 574 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
575 | if (error) |
576 | goto out; | |
5407e242 | 577 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
578 | qd++; |
579 | } | |
580 | ||
a91ea69f | 581 | out: |
b3b94faa DT |
582 | if (error) |
583 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
584 | return error; |
585 | } | |
586 | ||
587 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
588 | { | |
feaa7bba | 589 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
590 | unsigned int x; |
591 | ||
5407e242 BP |
592 | if (ip->i_res == NULL) |
593 | return; | |
b3b94faa DT |
594 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
595 | ||
5407e242 BP |
596 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
597 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
598 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 599 | } |
5407e242 | 600 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
601 | } |
602 | ||
603 | static int sort_qd(const void *a, const void *b) | |
604 | { | |
48fac179 SW |
605 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
606 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 607 | |
05e0a60d | 608 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 609 | return -1; |
05e0a60d | 610 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 611 | return 1; |
48fac179 | 612 | return 0; |
b3b94faa DT |
613 | } |
614 | ||
cd915493 | 615 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
616 | { |
617 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 618 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 619 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 620 | s64 x; |
b3b94faa | 621 | |
f55ab26a | 622 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 623 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
624 | |
625 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
626 | qc->qc_change = 0; | |
627 | qc->qc_flags = 0; | |
05e0a60d | 628 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 629 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 630 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
631 | } |
632 | ||
b44b84d7 | 633 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
634 | qc->qc_change = cpu_to_be64(x); |
635 | ||
7d80823e | 636 | spin_lock(&qd_lock); |
b3b94faa | 637 | qd->qd_change = x; |
7d80823e | 638 | spin_unlock(&qd_lock); |
b3b94faa DT |
639 | |
640 | if (!x) { | |
641 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
642 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
643 | qc->qc_flags = 0; | |
644 | qc->qc_id = 0; | |
645 | slot_put(qd); | |
646 | qd_put(qd); | |
647 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
648 | qd_hold(qd); | |
649 | slot_hold(qd); | |
650 | } | |
907b9bce | 651 | |
f55ab26a | 652 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
653 | } |
654 | ||
18ec7d5c | 655 | /** |
1e72c0f7 SW |
656 | * gfs2_adjust_quota - adjust record of current block usage |
657 | * @ip: The quota inode | |
658 | * @loc: Offset of the entry in the quota file | |
e285c100 | 659 | * @change: The amount of usage change to record |
1e72c0f7 | 660 | * @qd: The quota data |
e285c100 | 661 | * @fdq: The updated limits to record |
18ec7d5c SW |
662 | * |
663 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
664 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
665 | * |
666 | * Returns: 0 or -ve on error | |
18ec7d5c | 667 | */ |
1e72c0f7 | 668 | |
18ec7d5c | 669 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 | 670 | s64 change, struct gfs2_quota_data *qd, |
14bf61ff | 671 | struct qc_dqblk *fdq) |
18ec7d5c | 672 | { |
feaa7bba | 673 | struct inode *inode = &ip->i_inode; |
14870b45 | 674 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
675 | struct address_space *mapping = inode->i_mapping; |
676 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 677 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 678 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 679 | struct buffer_head *bh; |
18ec7d5c | 680 | struct page *page; |
7e619bc3 | 681 | void *kaddr, *ptr; |
951b4bd5 | 682 | struct gfs2_quota q; |
7e619bc3 | 683 | int err, nbytes; |
e285c100 | 684 | u64 size; |
18ec7d5c | 685 | |
891a8e93 SW |
686 | if (gfs2_is_stuffed(ip)) { |
687 | err = gfs2_unstuff_dinode(ip, NULL); | |
688 | if (err) | |
689 | return err; | |
690 | } | |
7e619bc3 AD |
691 | |
692 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 693 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
694 | if (err < 0) |
695 | return err; | |
696 | ||
697 | err = -EIO; | |
951b4bd5 AV |
698 | be64_add_cpu(&q.qu_value, change); |
699 | qd->qd_qb.qb_value = q.qu_value; | |
7e619bc3 | 700 | if (fdq) { |
14bf61ff JK |
701 | if (fdq->d_fieldmask & QC_SPC_SOFT) { |
702 | q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 703 | qd->qd_qb.qb_warn = q.qu_warn; |
7e619bc3 | 704 | } |
14bf61ff JK |
705 | if (fdq->d_fieldmask & QC_SPC_HARD) { |
706 | q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 707 | qd->qd_qb.qb_limit = q.qu_limit; |
7e619bc3 | 708 | } |
14bf61ff JK |
709 | if (fdq->d_fieldmask & QC_SPACE) { |
710 | q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 711 | qd->qd_qb.qb_value = q.qu_value; |
802ec9b6 | 712 | } |
7e619bc3 AD |
713 | } |
714 | ||
715 | /* Write the quota into the quota file on disk */ | |
951b4bd5 | 716 | ptr = &q; |
7e619bc3 AD |
717 | nbytes = sizeof(struct gfs2_quota); |
718 | get_a_page: | |
220cca2a | 719 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
720 | if (!page) |
721 | return -ENOMEM; | |
722 | ||
723 | blocksize = inode->i_sb->s_blocksize; | |
724 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
725 | ||
726 | if (!page_has_buffers(page)) | |
727 | create_empty_buffers(page, blocksize, 0); | |
728 | ||
729 | bh = page_buffers(page); | |
730 | pos = blocksize; | |
731 | while (offset >= pos) { | |
732 | bh = bh->b_this_page; | |
733 | iblock++; | |
734 | pos += blocksize; | |
735 | } | |
736 | ||
737 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 738 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 739 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
740 | goto unlock_out; |
741 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
742 | if (buffer_new(bh)) |
743 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
744 | } |
745 | ||
746 | if (PageUptodate(page)) | |
747 | set_buffer_uptodate(bh); | |
748 | ||
749 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 750 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
751 | wait_on_buffer(bh); |
752 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 753 | goto unlock_out; |
18ec7d5c SW |
754 | } |
755 | ||
37f71577 | 756 | gfs2_trans_add_data(ip->i_gl, bh); |
18ec7d5c | 757 | |
d9349285 | 758 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
759 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
760 | nbytes = PAGE_CACHE_SIZE - offset; | |
761 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 762 | flush_dcache_page(page); |
d9349285 | 763 | kunmap_atomic(kaddr); |
7e619bc3 AD |
764 | unlock_page(page); |
765 | page_cache_release(page); | |
766 | ||
767 | /* If quota straddles page boundary, we need to update the rest of the | |
768 | * quota at the beginning of the next page */ | |
8b421601 | 769 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
770 | ptr = ptr + nbytes; |
771 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
772 | offset = 0; | |
773 | index++; | |
774 | goto get_a_page; | |
775 | } | |
e285c100 | 776 | |
e285c100 | 777 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 778 | if (size > inode->i_size) |
e285c100 | 779 | i_size_write(inode, size); |
e285c100 | 780 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 781 | mark_inode_dirty(inode); |
991deec8 | 782 | set_bit(QDF_REFRESH, &qd->qd_flags); |
500242ac | 783 | return 0; |
ab9bbda0 | 784 | |
7e619bc3 | 785 | unlock_out: |
18ec7d5c SW |
786 | unlock_page(page); |
787 | page_cache_release(page); | |
788 | return err; | |
789 | } | |
790 | ||
b3b94faa DT |
791 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
792 | { | |
793 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 794 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 795 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
796 | unsigned int data_blocks, ind_blocks; |
797 | struct gfs2_holder *ghs, i_gh; | |
798 | unsigned int qx, x; | |
799 | struct gfs2_quota_data *qd; | |
71f890f7 | 800 | unsigned reserved; |
f42faf4f | 801 | loff_t offset; |
20b95bf2 | 802 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
803 | int error; |
804 | ||
0a305e49 BP |
805 | error = gfs2_rs_alloc(ip); |
806 | if (error) | |
807 | return error; | |
808 | ||
b3b94faa DT |
809 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
810 | &data_blocks, &ind_blocks); | |
811 | ||
16c5f06f | 812 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
813 | if (!ghs) |
814 | return -ENOMEM; | |
815 | ||
816 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 817 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 818 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 819 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
820 | GL_NOCACHE, &ghs[qx]); |
821 | if (error) | |
822 | goto out; | |
823 | } | |
824 | ||
825 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
826 | if (error) | |
827 | goto out; | |
828 | ||
829 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 830 | offset = qd2offset(qda[x]); |
461cb419 BP |
831 | if (gfs2_write_alloc_required(ip, offset, |
832 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
833 | nalloc++; |
834 | } | |
835 | ||
20b95bf2 AD |
836 | /* |
837 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
838 | * block to the reservation unconditionally. If the inode | |
839 | * doesn't need unstuffing, the block will be released to the | |
840 | * rgrp since it won't be allocated during the transaction | |
841 | */ | |
7e619bc3 AD |
842 | /* +3 in the end for unstuffing block, inode size update block |
843 | * and another block in case quota straddles page boundary and | |
844 | * two blocks need to be updated instead of 1 */ | |
845 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 846 | |
71f890f7 | 847 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
848 | ap.target = reserved; |
849 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
850 | if (error) |
851 | goto out_alloc; | |
b3b94faa | 852 | |
20b95bf2 | 853 | if (nalloc) |
71f890f7 | 854 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
855 | |
856 | error = gfs2_trans_begin(sdp, blocks, 0); | |
857 | if (error) | |
858 | goto out_ipres; | |
b3b94faa DT |
859 | |
860 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
861 | qd = qda[x]; |
862 | offset = qd2offset(qd); | |
e285c100 | 863 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 864 | if (error) |
b3b94faa | 865 | goto out_end_trans; |
b3b94faa DT |
866 | |
867 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 868 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
869 | } |
870 | ||
871 | error = 0; | |
872 | ||
a91ea69f | 873 | out_end_trans: |
b3b94faa | 874 | gfs2_trans_end(sdp); |
a91ea69f | 875 | out_ipres: |
20b95bf2 | 876 | gfs2_inplace_release(ip); |
a91ea69f | 877 | out_alloc: |
b3b94faa | 878 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 879 | out: |
b3b94faa DT |
880 | while (qx--) |
881 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 882 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 883 | kfree(ghs); |
24972557 | 884 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl, NORMAL_FLUSH); |
b3b94faa DT |
885 | return error; |
886 | } | |
887 | ||
e285c100 SW |
888 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
889 | { | |
890 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
891 | struct gfs2_quota q; | |
892 | struct gfs2_quota_lvb *qlvb; | |
893 | loff_t pos; | |
894 | int error; | |
895 | ||
896 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
897 | pos = qd2offset(qd); | |
4306629e | 898 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
899 | if (error < 0) |
900 | return error; | |
901 | ||
4e2f8849 | 902 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
903 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
904 | qlvb->__pad = 0; | |
905 | qlvb->qb_limit = q.qu_limit; | |
906 | qlvb->qb_warn = q.qu_warn; | |
907 | qlvb->qb_value = q.qu_value; | |
908 | qd->qd_qb = *qlvb; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
b3b94faa DT |
913 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
914 | struct gfs2_holder *q_gh) | |
915 | { | |
916 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 917 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 918 | struct gfs2_holder i_gh; |
b3b94faa DT |
919 | int error; |
920 | ||
a91ea69f | 921 | restart: |
b3b94faa DT |
922 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
923 | if (error) | |
924 | return error; | |
925 | ||
4e2f8849 | 926 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 927 | |
e9fc2aa0 | 928 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 929 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
930 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
931 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
932 | if (error) |
933 | return error; | |
934 | ||
e9fc2aa0 | 935 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
936 | if (error) |
937 | goto fail; | |
938 | ||
e285c100 SW |
939 | error = update_qd(sdp, qd); |
940 | if (error) | |
1e72c0f7 | 941 | goto fail_gunlock; |
b3b94faa | 942 | |
e285c100 | 943 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
944 | gfs2_glock_dq_uninit(q_gh); |
945 | force_refresh = 0; | |
946 | goto restart; | |
b3b94faa DT |
947 | } |
948 | ||
949 | return 0; | |
950 | ||
a91ea69f | 951 | fail_gunlock: |
b3b94faa | 952 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 953 | fail: |
b3b94faa | 954 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
955 | return error; |
956 | } | |
957 | ||
7c06b5d6 | 958 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 959 | { |
feaa7bba | 960 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 961 | struct gfs2_quota_data *qd; |
b3b94faa DT |
962 | unsigned int x; |
963 | int error = 0; | |
964 | ||
891a8e93 SW |
965 | error = gfs2_quota_hold(ip, uid, gid); |
966 | if (error) | |
967 | return error; | |
b3b94faa DT |
968 | |
969 | if (capable(CAP_SYS_RESOURCE) || | |
970 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
971 | return 0; | |
972 | ||
5407e242 BP |
973 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
974 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 975 | |
5407e242 | 976 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 977 | int force = NO_FORCE; |
5407e242 | 978 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
979 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
980 | force = FORCE; | |
5407e242 | 981 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
982 | if (error) |
983 | break; | |
984 | } | |
985 | ||
986 | if (!error) | |
987 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
988 | else { | |
989 | while (x--) | |
5407e242 | 990 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
991 | gfs2_quota_unhold(ip); |
992 | } | |
993 | ||
994 | return error; | |
995 | } | |
996 | ||
997 | static int need_sync(struct gfs2_quota_data *qd) | |
998 | { | |
999 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
1000 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 1001 | s64 value; |
b3b94faa DT |
1002 | unsigned int num, den; |
1003 | int do_sync = 1; | |
1004 | ||
1005 | if (!qd->qd_qb.qb_limit) | |
1006 | return 0; | |
1007 | ||
7d80823e | 1008 | spin_lock(&qd_lock); |
b3b94faa | 1009 | value = qd->qd_change; |
7d80823e | 1010 | spin_unlock(&qd_lock); |
b3b94faa DT |
1011 | |
1012 | spin_lock(>->gt_spin); | |
1013 | num = gt->gt_quota_scale_num; | |
1014 | den = gt->gt_quota_scale_den; | |
1015 | spin_unlock(>->gt_spin); | |
1016 | ||
1017 | if (value < 0) | |
1018 | do_sync = 0; | |
e9fc2aa0 SW |
1019 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1020 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1021 | do_sync = 0; |
1022 | else { | |
1023 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1024 | value = div_s64(value, den); |
e9fc2aa0 | 1025 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1026 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1027 | do_sync = 0; |
1028 | } | |
1029 | ||
1030 | return do_sync; | |
1031 | } | |
1032 | ||
1033 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1034 | { | |
aabd7c72 | 1035 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1036 | struct gfs2_quota_data *qda[4]; |
1037 | unsigned int count = 0; | |
1038 | unsigned int x; | |
aabd7c72 | 1039 | int found; |
b3b94faa DT |
1040 | |
1041 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1042 | goto out; | |
1043 | ||
5407e242 | 1044 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1045 | struct gfs2_quota_data *qd; |
1046 | int sync; | |
1047 | ||
5407e242 | 1048 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1049 | sync = need_sync(qd); |
1050 | ||
5407e242 | 1051 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
aabd7c72 SW |
1052 | if (!sync) |
1053 | continue; | |
1054 | ||
7d80823e | 1055 | spin_lock(&qd_lock); |
aabd7c72 | 1056 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1057 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1058 | |
1059 | if (!found) | |
1060 | continue; | |
1061 | ||
1062 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1063 | if (bh_get(qd)) { | |
1064 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1065 | slot_put(qd); | |
1066 | qd_put(qd); | |
1067 | continue; | |
1068 | } | |
b3b94faa | 1069 | |
aabd7c72 | 1070 | qda[count++] = qd; |
b3b94faa DT |
1071 | } |
1072 | ||
1073 | if (count) { | |
1074 | do_sync(count, qda); | |
1075 | for (x = 0; x < count; x++) | |
1076 | qd_unlock(qda[x]); | |
1077 | } | |
1078 | ||
a91ea69f | 1079 | out: |
b3b94faa DT |
1080 | gfs2_quota_unhold(ip); |
1081 | } | |
1082 | ||
1083 | #define MAX_LINE 256 | |
1084 | ||
1085 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1086 | { | |
1087 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1088 | |
8382e26b JP |
1089 | fs_info(sdp, "quota %s for %s %u\n", |
1090 | type, | |
d77d1b58 JP |
1091 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1092 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1093 | |
1094 | return 0; | |
1095 | } | |
1096 | ||
25435e5e AD |
1097 | /** |
1098 | * gfs2_quota_check - check if allocating new blocks will exceed quota | |
1099 | * @ip: The inode for which this check is being performed | |
1100 | * @uid: The uid to check against | |
1101 | * @gid: The gid to check against | |
1102 | * @ap: The allocation parameters. ap->target contains the requested | |
1103 | * blocks. ap->min_target, if set, contains the minimum blks | |
1104 | * requested. | |
1105 | * | |
1106 | * Returns: 0 on success. | |
1107 | * min_req = ap->min_target ? ap->min_target : ap->target; | |
1108 | * quota must allow atleast min_req blks for success and | |
1109 | * ap->allowed is set to the number of blocks allowed | |
1110 | * | |
1111 | * -EDQUOT otherwise, quota violation. ap->allowed is set to number | |
1112 | * of blocks available. | |
1113 | */ | |
b8fbf471 AD |
1114 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, |
1115 | struct gfs2_alloc_parms *ap) | |
b3b94faa | 1116 | { |
feaa7bba | 1117 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1118 | struct gfs2_quota_data *qd; |
25435e5e | 1119 | s64 value, warn, limit; |
b3b94faa DT |
1120 | unsigned int x; |
1121 | int error = 0; | |
1122 | ||
25435e5e | 1123 | ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ |
b3b94faa DT |
1124 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
1125 | return 0; | |
1126 | ||
1127 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1128 | return 0; | |
1129 | ||
5407e242 BP |
1130 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1131 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1132 | |
05e0a60d EB |
1133 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1134 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1135 | continue; |
1136 | ||
25435e5e AD |
1137 | warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn); |
1138 | limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit); | |
e9fc2aa0 | 1139 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1140 | spin_lock(&qd_lock); |
25435e5e | 1141 | value += qd->qd_change; |
7d80823e | 1142 | spin_unlock(&qd_lock); |
b3b94faa | 1143 | |
25435e5e AD |
1144 | if (limit > 0 && (limit - value) < ap->allowed) |
1145 | ap->allowed = limit - value; | |
1146 | /* If we can't meet the target */ | |
1147 | if (limit && limit < (value + (s64)ap->target)) { | |
1148 | /* If no min_target specified or we don't meet | |
1149 | * min_target, return -EDQUOT */ | |
1150 | if (!ap->min_target || ap->min_target > ap->allowed) { | |
1151 | print_message(qd, "exceeded"); | |
1152 | quota_send_warning(qd->qd_id, | |
1153 | sdp->sd_vfs->s_dev, | |
1154 | QUOTA_NL_BHARDWARN); | |
1155 | error = -EDQUOT; | |
1156 | break; | |
1157 | } | |
1158 | } else if (warn && warn < value && | |
b3b94faa | 1159 | time_after_eq(jiffies, qd->qd_last_warn + |
25435e5e AD |
1160 | gfs2_tune_get(sdp, gt_quota_warn_period) |
1161 | * HZ)) { | |
05e0a60d | 1162 | quota_send_warning(qd->qd_id, |
2ec46505 | 1163 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1164 | error = print_message(qd, "warning"); |
1165 | qd->qd_last_warn = jiffies; | |
1166 | } | |
1167 | } | |
b3b94faa DT |
1168 | return error; |
1169 | } | |
1170 | ||
cd915493 | 1171 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1172 | kuid_t uid, kgid_t gid) |
b3b94faa | 1173 | { |
b3b94faa DT |
1174 | struct gfs2_quota_data *qd; |
1175 | unsigned int x; | |
b3b94faa | 1176 | |
feaa7bba | 1177 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1178 | return; |
383f01fb | 1179 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1180 | return; |
1181 | ||
5407e242 BP |
1182 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1183 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1184 | |
05e0a60d EB |
1185 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1186 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1187 | do_qc(qd, change); |
b3b94faa DT |
1188 | } |
1189 | } | |
1190 | } | |
1191 | ||
ceed1723 | 1192 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1193 | { |
8c42d637 | 1194 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1195 | struct gfs2_quota_data **qda; |
bef292a7 | 1196 | unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder); |
b3b94faa DT |
1197 | unsigned int num_qd; |
1198 | unsigned int x; | |
1199 | int error = 0; | |
1200 | ||
b3b94faa DT |
1201 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1202 | if (!qda) | |
1203 | return -ENOMEM; | |
1204 | ||
e46c772d SW |
1205 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1206 | sdp->sd_quota_sync_gen++; | |
1207 | ||
b3b94faa DT |
1208 | do { |
1209 | num_qd = 0; | |
1210 | ||
1211 | for (;;) { | |
1212 | error = qd_fish(sdp, qda + num_qd); | |
1213 | if (error || !qda[num_qd]) | |
1214 | break; | |
1215 | if (++num_qd == max_qd) | |
1216 | break; | |
1217 | } | |
1218 | ||
1219 | if (num_qd) { | |
1220 | if (!error) | |
1221 | error = do_sync(num_qd, qda); | |
1222 | if (!error) | |
1223 | for (x = 0; x < num_qd; x++) | |
1224 | qda[x]->qd_sync_gen = | |
1225 | sdp->sd_quota_sync_gen; | |
1226 | ||
1227 | for (x = 0; x < num_qd; x++) | |
1228 | qd_unlock(qda[x]); | |
1229 | } | |
1230 | } while (!error && num_qd == max_qd); | |
1231 | ||
e46c772d | 1232 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1233 | kfree(qda); |
1234 | ||
1235 | return error; | |
1236 | } | |
1237 | ||
ed87dabc | 1238 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1239 | { |
1240 | struct gfs2_quota_data *qd; | |
1241 | struct gfs2_holder q_gh; | |
1242 | int error; | |
1243 | ||
05e0a60d | 1244 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1245 | if (error) |
1246 | return error; | |
1247 | ||
1248 | error = do_glock(qd, FORCE, &q_gh); | |
1249 | if (!error) | |
1250 | gfs2_glock_dq_uninit(&q_gh); | |
1251 | ||
1252 | qd_put(qd); | |
b3b94faa DT |
1253 | return error; |
1254 | } | |
1255 | ||
b3b94faa DT |
1256 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1257 | { | |
feaa7bba | 1258 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1259 | u64 size = i_size_read(sdp->sd_qc_inode); |
1260 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1261 | unsigned int x, slot = 0; |
1262 | unsigned int found = 0; | |
c754fbbb | 1263 | unsigned int hash; |
ee2411a8 | 1264 | unsigned int bm_size; |
cd915493 SW |
1265 | u64 dblock; |
1266 | u32 extlen = 0; | |
b3b94faa DT |
1267 | int error; |
1268 | ||
a2e0f799 | 1269 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1270 | return -EIO; |
a2e0f799 | 1271 | |
b3b94faa | 1272 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1273 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1274 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1275 | error = -ENOMEM; |
fcf10d38 | 1276 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1277 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 FF |
1278 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
1279 | __GFP_ZERO, PAGE_KERNEL); | |
b3b94faa DT |
1280 | if (!sdp->sd_quota_bitmap) |
1281 | return error; | |
1282 | ||
b3b94faa DT |
1283 | for (x = 0; x < blocks; x++) { |
1284 | struct buffer_head *bh; | |
7aed98fb | 1285 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1286 | unsigned int y; |
1287 | ||
1288 | if (!extlen) { | |
1289 | int new = 0; | |
feaa7bba | 1290 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1291 | if (error) |
1292 | goto fail; | |
1293 | } | |
b3b94faa | 1294 | error = -EIO; |
7276b3b0 SW |
1295 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1296 | if (!bh) | |
1297 | goto fail; | |
b3b94faa DT |
1298 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1299 | brelse(bh); | |
1300 | goto fail; | |
1301 | } | |
1302 | ||
7aed98fb | 1303 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1304 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1305 | y++, slot++) { |
b3b94faa | 1306 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1307 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1308 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1309 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1310 | USRQUOTA : GRPQUOTA; | |
1311 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1312 | be32_to_cpu(qc->qc_id)); | |
1313 | qc++; | |
1314 | if (!qc_change) | |
b3b94faa DT |
1315 | continue; |
1316 | ||
c754fbbb SW |
1317 | hash = gfs2_qd_hash(sdp, qc_id); |
1318 | qd = qd_alloc(hash, sdp, qc_id); | |
1319 | if (qd == NULL) { | |
b3b94faa DT |
1320 | brelse(bh); |
1321 | goto fail; | |
1322 | } | |
1323 | ||
1324 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1325 | qd->qd_change = qc_change; |
b3b94faa DT |
1326 | qd->qd_slot = slot; |
1327 | qd->qd_slot_count = 1; | |
b3b94faa | 1328 | |
7d80823e | 1329 | spin_lock(&qd_lock); |
ee2411a8 | 1330 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1331 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1332 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1333 | spin_unlock(&qd_lock); |
b3b94faa | 1334 | |
c754fbbb SW |
1335 | spin_lock_bucket(hash); |
1336 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1337 | spin_unlock_bucket(hash); | |
1338 | ||
b3b94faa DT |
1339 | found++; |
1340 | } | |
1341 | ||
1342 | brelse(bh); | |
1343 | dblock++; | |
1344 | extlen--; | |
1345 | } | |
1346 | ||
1347 | if (found) | |
1348 | fs_info(sdp, "found %u quota changes\n", found); | |
1349 | ||
1350 | return 0; | |
1351 | ||
a91ea69f | 1352 | fail: |
b3b94faa DT |
1353 | gfs2_quota_cleanup(sdp); |
1354 | return error; | |
1355 | } | |
1356 | ||
b3b94faa DT |
1357 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1358 | { | |
1359 | struct list_head *head = &sdp->sd_quota_list; | |
1360 | struct gfs2_quota_data *qd; | |
b3b94faa | 1361 | |
7d80823e | 1362 | spin_lock(&qd_lock); |
b3b94faa DT |
1363 | while (!list_empty(head)) { |
1364 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1365 | ||
b3b94faa | 1366 | list_del(&qd->qd_list); |
c754fbbb | 1367 | |
0a7ab79c | 1368 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1369 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1370 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1371 | spin_unlock(&qd_lock); |
b3b94faa | 1372 | |
c754fbbb SW |
1373 | spin_lock_bucket(qd->qd_hash); |
1374 | hlist_bl_del_rcu(&qd->qd_hlist); | |
1375 | spin_unlock_bucket(qd->qd_hash); | |
1376 | ||
8ad151c2 SW |
1377 | gfs2_assert_warn(sdp, !qd->qd_change); |
1378 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
b3b94faa DT |
1379 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
1380 | ||
f057f6cd | 1381 | gfs2_glock_put(qd->qd_gl); |
c754fbbb | 1382 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
b3b94faa | 1383 | |
7d80823e | 1384 | spin_lock(&qd_lock); |
b3b94faa | 1385 | } |
7d80823e | 1386 | spin_unlock(&qd_lock); |
b3b94faa DT |
1387 | |
1388 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1389 | ||
3cdcf63e AV |
1390 | kvfree(sdp->sd_quota_bitmap); |
1391 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1392 | } |
1393 | ||
37b2c837 SW |
1394 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1395 | { | |
1396 | if (error == 0 || error == -EROFS) | |
1397 | return; | |
1398 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1399 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1400 | } | |
1401 | ||
1402 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1403 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1404 | unsigned long t, unsigned long *timeo, |
1405 | unsigned int *new_timeo) | |
1406 | { | |
1407 | if (t >= *timeo) { | |
8c42d637 | 1408 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1409 | quotad_error(sdp, msg, error); |
1410 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1411 | } else { | |
1412 | *timeo -= t; | |
1413 | } | |
1414 | } | |
1415 | ||
813e0c46 SW |
1416 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1417 | { | |
1418 | struct gfs2_inode *ip; | |
1419 | ||
1420 | while(1) { | |
1421 | ip = NULL; | |
1422 | spin_lock(&sdp->sd_trunc_lock); | |
1423 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1424 | ip = list_entry(sdp->sd_trunc_list.next, | |
1425 | struct gfs2_inode, i_trunc_list); | |
1426 | list_del_init(&ip->i_trunc_list); | |
1427 | } | |
1428 | spin_unlock(&sdp->sd_trunc_lock); | |
1429 | if (ip == NULL) | |
1430 | return; | |
1431 | gfs2_glock_finish_truncate(ip); | |
1432 | } | |
1433 | } | |
1434 | ||
3d3c10f2 BM |
1435 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1436 | if (!sdp->sd_statfs_force_sync) { | |
1437 | sdp->sd_statfs_force_sync = 1; | |
1438 | wake_up(&sdp->sd_quota_wait); | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | ||
37b2c837 SW |
1443 | /** |
1444 | * gfs2_quotad - Write cached quota changes into the quota file | |
1445 | * @sdp: Pointer to GFS2 superblock | |
1446 | * | |
1447 | */ | |
1448 | ||
1449 | int gfs2_quotad(void *data) | |
1450 | { | |
1451 | struct gfs2_sbd *sdp = data; | |
1452 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1453 | unsigned long statfs_timeo = 0; | |
1454 | unsigned long quotad_timeo = 0; | |
1455 | unsigned long t = 0; | |
1456 | DEFINE_WAIT(wait); | |
813e0c46 | 1457 | int empty; |
37b2c837 SW |
1458 | |
1459 | while (!kthread_should_stop()) { | |
1460 | ||
1461 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1462 | if (sdp->sd_statfs_force_sync) { |
1463 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1464 | quotad_error(sdp, "statfs", error); | |
1465 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1466 | } | |
1467 | else | |
1468 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1469 | &statfs_timeo, | |
1470 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1471 | |
1472 | /* Update quota file */ | |
edd2e9ac | 1473 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1474 | "ad_timeo, &tune->gt_quota_quantum); |
1475 | ||
813e0c46 SW |
1476 | /* Check for & recover partially truncated inodes */ |
1477 | quotad_check_trunc_list(sdp); | |
1478 | ||
a0acae0e TH |
1479 | try_to_freeze(); |
1480 | ||
37b2c837 SW |
1481 | t = min(quotad_timeo, statfs_timeo); |
1482 | ||
7fa5d20d | 1483 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1484 | spin_lock(&sdp->sd_trunc_lock); |
1485 | empty = list_empty(&sdp->sd_trunc_list); | |
1486 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1487 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1488 | t -= schedule_timeout(t); |
1489 | else | |
1490 | t = 0; | |
37b2c837 SW |
1491 | finish_wait(&sdp->sd_quota_wait, &wait); |
1492 | } | |
1493 | ||
1494 | return 0; | |
1495 | } | |
1496 | ||
1d371b5e SW |
1497 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1498 | struct fs_quota_stat *fqs) | |
1499 | { | |
1500 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1501 | ||
1502 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1503 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1504 | |
1505 | switch (sdp->sd_args.ar_quota) { | |
1506 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1507 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1508 | /*FALLTHRU*/ |
1509 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1510 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1511 | break; |
1512 | case GFS2_QUOTA_OFF: | |
1513 | break; | |
1514 | } | |
1515 | ||
1d371b5e SW |
1516 | if (sdp->sd_quota_inode) { |
1517 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1518 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1519 | } | |
1520 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1521 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
2147dbfd | 1522 | fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru); |
1d371b5e SW |
1523 | return 0; |
1524 | } | |
1525 | ||
74a8a103 | 1526 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1527 | struct qc_dqblk *fdq) |
113d6b3c SW |
1528 | { |
1529 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1530 | struct gfs2_quota_lvb *qlvb; | |
1531 | struct gfs2_quota_data *qd; | |
1532 | struct gfs2_holder q_gh; | |
1533 | int error; | |
1534 | ||
14bf61ff | 1535 | memset(fdq, 0, sizeof(*fdq)); |
113d6b3c SW |
1536 | |
1537 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1538 | return -ESRCH; /* Crazy XFS error code */ | |
1539 | ||
236c64e4 EB |
1540 | if ((qid.type != USRQUOTA) && |
1541 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1542 | return -EINVAL; |
1543 | ||
05e0a60d | 1544 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1545 | if (error) |
1546 | return error; | |
1547 | error = do_glock(qd, FORCE, &q_gh); | |
1548 | if (error) | |
1549 | goto out; | |
1550 | ||
4e2f8849 | 1551 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
14bf61ff JK |
1552 | fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift; |
1553 | fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift; | |
1554 | fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift; | |
113d6b3c SW |
1555 | |
1556 | gfs2_glock_dq_uninit(&q_gh); | |
1557 | out: | |
1558 | qd_put(qd); | |
1559 | return error; | |
1560 | } | |
1561 | ||
e285c100 | 1562 | /* GFS2 only supports a subset of the XFS fields */ |
14bf61ff | 1563 | #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE) |
e285c100 | 1564 | |
74a8a103 | 1565 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1566 | struct qc_dqblk *fdq) |
e285c100 SW |
1567 | { |
1568 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1569 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1570 | struct gfs2_quota_data *qd; | |
1571 | struct gfs2_holder q_gh, i_gh; | |
1572 | unsigned int data_blocks, ind_blocks; | |
1573 | unsigned int blocks = 0; | |
1574 | int alloc_required; | |
e285c100 SW |
1575 | loff_t offset; |
1576 | int error; | |
1577 | ||
1578 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1579 | return -ESRCH; /* Crazy XFS error code */ | |
1580 | ||
236c64e4 EB |
1581 | if ((qid.type != USRQUOTA) && |
1582 | (qid.type != GRPQUOTA)) | |
e285c100 | 1583 | return -EINVAL; |
e285c100 SW |
1584 | |
1585 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1586 | return -EINVAL; | |
e285c100 | 1587 | |
05e0a60d | 1588 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1589 | if (error) |
1590 | return error; | |
1591 | ||
0a305e49 BP |
1592 | error = gfs2_rs_alloc(ip); |
1593 | if (error) | |
1594 | goto out_put; | |
1595 | ||
e285c100 SW |
1596 | mutex_lock(&ip->i_inode.i_mutex); |
1597 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1598 | if (error) | |
0a305e49 | 1599 | goto out_unlockput; |
e285c100 SW |
1600 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1601 | if (error) | |
1602 | goto out_q; | |
1603 | ||
1604 | /* Check for existing entry, if none then alloc new blocks */ | |
1605 | error = update_qd(sdp, qd); | |
1606 | if (error) | |
1607 | goto out_i; | |
1608 | ||
1609 | /* If nothing has changed, this is a no-op */ | |
14bf61ff JK |
1610 | if ((fdq->d_fieldmask & QC_SPC_SOFT) && |
1611 | ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) | |
1612 | fdq->d_fieldmask ^= QC_SPC_SOFT; | |
802ec9b6 | 1613 | |
14bf61ff JK |
1614 | if ((fdq->d_fieldmask & QC_SPC_HARD) && |
1615 | ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) | |
1616 | fdq->d_fieldmask ^= QC_SPC_HARD; | |
802ec9b6 | 1617 | |
14bf61ff JK |
1618 | if ((fdq->d_fieldmask & QC_SPACE) && |
1619 | ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1620 | fdq->d_fieldmask ^= QC_SPACE; | |
802ec9b6 | 1621 | |
e285c100 SW |
1622 | if (fdq->d_fieldmask == 0) |
1623 | goto out_i; | |
1624 | ||
1625 | offset = qd2offset(qd); | |
461cb419 | 1626 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1627 | if (gfs2_is_stuffed(ip)) |
1628 | alloc_required = 1; | |
e285c100 | 1629 | if (alloc_required) { |
7b9cff46 | 1630 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1631 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1632 | &data_blocks, &ind_blocks); | |
564e12b1 | 1633 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1634 | ap.target = blocks; |
1635 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1636 | if (error) |
564e12b1 | 1637 | goto out_i; |
71f890f7 | 1638 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1639 | } |
1640 | ||
e79a46a0 AD |
1641 | /* Some quotas span block boundaries and can update two blocks, |
1642 | adding an extra block to the transaction to handle such quotas */ | |
1643 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1644 | if (error) |
1645 | goto out_release; | |
1646 | ||
1647 | /* Apply changes */ | |
1648 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1649 | ||
1650 | gfs2_trans_end(sdp); | |
1651 | out_release: | |
564e12b1 | 1652 | if (alloc_required) |
e285c100 | 1653 | gfs2_inplace_release(ip); |
e285c100 SW |
1654 | out_i: |
1655 | gfs2_glock_dq_uninit(&i_gh); | |
1656 | out_q: | |
1657 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1658 | out_unlockput: |
e285c100 | 1659 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1660 | out_put: |
e285c100 SW |
1661 | qd_put(qd); |
1662 | return error; | |
1663 | } | |
1664 | ||
cc632e7f SW |
1665 | const struct quotactl_ops gfs2_quotactl_ops = { |
1666 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1667 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1668 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1669 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1670 | }; |
c754fbbb SW |
1671 | |
1672 | void __init gfs2_quota_hash_init(void) | |
1673 | { | |
1674 | unsigned i; | |
1675 | ||
1676 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1677 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1678 | } |