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 | ||
148 | static enum lru_status gfs2_qd_isolate(struct list_head *item, spinlock_t *lock, void *arg) | |
149 | { | |
150 | struct list_head *dispose = arg; | |
151 | struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru); | |
152 | ||
153 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
154 | return LRU_SKIP; | |
155 | ||
156 | if (qd->qd_lockref.count == 0) { | |
157 | lockref_mark_dead(&qd->qd_lockref); | |
158 | list_move(&qd->qd_lru, dispose); | |
159 | } | |
160 | ||
161 | spin_unlock(&qd->qd_lockref.lock); | |
162 | return LRU_REMOVED; | |
163 | } | |
164 | ||
165 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
166 | struct shrink_control *sc) | |
167 | { | |
168 | LIST_HEAD(dispose); | |
169 | unsigned long freed; | |
170 | ||
171 | if (!(sc->gfp_mask & __GFP_FS)) | |
172 | return SHRINK_STOP; | |
173 | ||
174 | freed = list_lru_walk_node(&gfs2_qd_lru, sc->nid, gfs2_qd_isolate, | |
175 | &dispose, &sc->nr_to_scan); | |
176 | ||
177 | gfs2_qd_dispose(&dispose); | |
178 | ||
1ab6c499 DC |
179 | return freed; |
180 | } | |
0a7ab79c | 181 | |
2147dbfd SW |
182 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
183 | struct shrink_control *sc) | |
1ab6c499 | 184 | { |
2147dbfd | 185 | return vfs_pressure_ratio(list_lru_count_node(&gfs2_qd_lru, sc->nid)); |
0a7ab79c AD |
186 | } |
187 | ||
2147dbfd SW |
188 | struct shrinker gfs2_qd_shrinker = { |
189 | .count_objects = gfs2_qd_shrink_count, | |
190 | .scan_objects = gfs2_qd_shrink_scan, | |
191 | .seeks = DEFAULT_SEEKS, | |
192 | .flags = SHRINKER_NUMA_AWARE, | |
193 | }; | |
194 | ||
195 | ||
2f6c9896 EB |
196 | static u64 qd2index(struct gfs2_quota_data *qd) |
197 | { | |
05e0a60d EB |
198 | struct kqid qid = qd->qd_id; |
199 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 200 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
201 | } |
202 | ||
cd915493 | 203 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 204 | { |
cd915493 | 205 | u64 offset; |
b3b94faa | 206 | |
2f6c9896 | 207 | offset = qd2index(qd); |
b3b94faa DT |
208 | offset *= sizeof(struct gfs2_quota); |
209 | ||
210 | return offset; | |
211 | } | |
212 | ||
c754fbbb | 213 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
214 | { |
215 | struct gfs2_quota_data *qd; | |
216 | int error; | |
217 | ||
37b2c837 | 218 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 219 | if (!qd) |
c754fbbb | 220 | return NULL; |
b3b94faa | 221 | |
c754fbbb | 222 | qd->qd_sbd = sdp; |
9b9f039d SW |
223 | qd->qd_lockref.count = 1; |
224 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 225 | qd->qd_id = qid; |
b3b94faa | 226 | qd->qd_slot = -1; |
2147dbfd | 227 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 228 | qd->qd_hash = hash; |
b3b94faa | 229 | |
2f6c9896 | 230 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
231 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
232 | if (error) | |
233 | goto fail; | |
234 | ||
c754fbbb | 235 | return qd; |
b3b94faa | 236 | |
a91ea69f | 237 | fail: |
37b2c837 | 238 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 239 | return NULL; |
b3b94faa DT |
240 | } |
241 | ||
c754fbbb SW |
242 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
243 | const struct gfs2_sbd *sdp, | |
244 | struct kqid qid) | |
b3b94faa | 245 | { |
c754fbbb SW |
246 | struct gfs2_quota_data *qd; |
247 | struct hlist_bl_node *h; | |
b3b94faa | 248 | |
c754fbbb SW |
249 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
250 | if (!qid_eq(qd->qd_id, qid)) | |
251 | continue; | |
252 | if (qd->qd_sbd != sdp) | |
253 | continue; | |
254 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
255 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
256 | return qd; | |
b3b94faa | 257 | } |
c754fbbb | 258 | } |
b3b94faa | 259 | |
c754fbbb SW |
260 | return NULL; |
261 | } | |
b3b94faa | 262 | |
b3b94faa | 263 | |
c754fbbb SW |
264 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
265 | struct gfs2_quota_data **qdp) | |
266 | { | |
267 | struct gfs2_quota_data *qd, *new_qd; | |
268 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 269 | |
c754fbbb SW |
270 | rcu_read_lock(); |
271 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
272 | rcu_read_unlock(); | |
b3b94faa | 273 | |
c754fbbb SW |
274 | if (qd) |
275 | return 0; | |
276 | ||
277 | new_qd = qd_alloc(hash, sdp, qid); | |
278 | if (!new_qd) | |
279 | return -ENOMEM; | |
280 | ||
281 | spin_lock(&qd_lock); | |
282 | spin_lock_bucket(hash); | |
283 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
284 | if (qd == NULL) { | |
285 | *qdp = new_qd; | |
286 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
287 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
288 | atomic_inc(&sdp->sd_quota_count); | |
289 | } | |
290 | spin_unlock_bucket(hash); | |
291 | spin_unlock(&qd_lock); | |
292 | ||
293 | if (qd) { | |
294 | gfs2_glock_put(new_qd->qd_gl); | |
295 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 296 | } |
c754fbbb SW |
297 | |
298 | return 0; | |
b3b94faa DT |
299 | } |
300 | ||
c754fbbb | 301 | |
b3b94faa DT |
302 | static void qd_hold(struct gfs2_quota_data *qd) |
303 | { | |
304 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
9b9f039d SW |
305 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
306 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
307 | } |
308 | ||
309 | static void qd_put(struct gfs2_quota_data *qd) | |
310 | { | |
2147dbfd SW |
311 | if (lockref_put_or_lock(&qd->qd_lockref)) |
312 | return; | |
9b9f039d | 313 | |
2147dbfd SW |
314 | qd->qd_lockref.count = 0; |
315 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
316 | spin_unlock(&qd->qd_lockref.lock); | |
9b9f039d | 317 | |
b3b94faa DT |
318 | } |
319 | ||
320 | static int slot_get(struct gfs2_quota_data *qd) | |
321 | { | |
ee2411a8 SW |
322 | struct gfs2_sbd *sdp = qd->qd_sbd; |
323 | unsigned int bit; | |
324 | int error = 0; | |
b3b94faa | 325 | |
2d9e7230 | 326 | spin_lock(&sdp->sd_bitmap_lock); |
ee2411a8 SW |
327 | if (qd->qd_slot_count != 0) |
328 | goto out; | |
b3b94faa | 329 | |
ee2411a8 SW |
330 | error = -ENOSPC; |
331 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots); | |
332 | if (bit < sdp->sd_quota_slots) { | |
333 | set_bit(bit, sdp->sd_quota_bitmap); | |
334 | qd->qd_slot = bit; | |
335 | out: | |
336 | qd->qd_slot_count++; | |
b3b94faa | 337 | } |
2d9e7230 | 338 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa | 339 | |
ee2411a8 | 340 | return error; |
b3b94faa DT |
341 | } |
342 | ||
343 | static void slot_hold(struct gfs2_quota_data *qd) | |
344 | { | |
ee2411a8 | 345 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 346 | |
2d9e7230 | 347 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
348 | gfs2_assert(sdp, qd->qd_slot_count); |
349 | qd->qd_slot_count++; | |
2d9e7230 | 350 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
351 | } |
352 | ||
353 | static void slot_put(struct gfs2_quota_data *qd) | |
354 | { | |
ee2411a8 | 355 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 356 | |
2d9e7230 | 357 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
358 | gfs2_assert(sdp, qd->qd_slot_count); |
359 | if (!--qd->qd_slot_count) { | |
ee2411a8 | 360 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
361 | qd->qd_slot = -1; |
362 | } | |
2d9e7230 | 363 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
364 | } |
365 | ||
366 | static int bh_get(struct gfs2_quota_data *qd) | |
367 | { | |
368 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 369 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 370 | unsigned int block, offset; |
b3b94faa DT |
371 | struct buffer_head *bh; |
372 | int error; | |
23591256 | 373 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 374 | |
f55ab26a | 375 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
376 | |
377 | if (qd->qd_bh_count++) { | |
f55ab26a | 378 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
379 | return 0; |
380 | } | |
381 | ||
382 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 383 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 384 | |
23591256 | 385 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 386 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
387 | if (error) |
388 | goto fail; | |
7276b3b0 | 389 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
390 | if (error) |
391 | goto fail; | |
392 | error = -EIO; | |
393 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
394 | goto fail_brelse; | |
395 | ||
396 | qd->qd_bh = bh; | |
397 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
398 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
399 | offset * sizeof(struct gfs2_quota_change)); | |
400 | ||
2e95b665 | 401 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
402 | |
403 | return 0; | |
404 | ||
a91ea69f | 405 | fail_brelse: |
b3b94faa | 406 | brelse(bh); |
a91ea69f | 407 | fail: |
b3b94faa | 408 | qd->qd_bh_count--; |
f55ab26a | 409 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
410 | return error; |
411 | } | |
412 | ||
413 | static void bh_put(struct gfs2_quota_data *qd) | |
414 | { | |
415 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
416 | ||
f55ab26a | 417 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
418 | gfs2_assert(sdp, qd->qd_bh_count); |
419 | if (!--qd->qd_bh_count) { | |
420 | brelse(qd->qd_bh); | |
421 | qd->qd_bh = NULL; | |
422 | qd->qd_bh_qc = NULL; | |
423 | } | |
f55ab26a | 424 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
425 | } |
426 | ||
1bf59bf6 SW |
427 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
428 | u64 *sync_gen) | |
429 | { | |
430 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
431 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
432 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
433 | return 0; | |
434 | ||
2147dbfd SW |
435 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
436 | return 0; | |
1bf59bf6 | 437 | |
2147dbfd | 438 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 439 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 440 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 441 | slot_hold(qd); |
1bf59bf6 SW |
442 | return 1; |
443 | } | |
444 | ||
b3b94faa DT |
445 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
446 | { | |
447 | struct gfs2_quota_data *qd = NULL; | |
448 | int error; | |
449 | int found = 0; | |
450 | ||
451 | *qdp = NULL; | |
452 | ||
453 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
454 | return 0; | |
455 | ||
7d80823e | 456 | spin_lock(&qd_lock); |
b3b94faa DT |
457 | |
458 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
459 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
460 | if (found) | |
461 | break; | |
b3b94faa DT |
462 | } |
463 | ||
464 | if (!found) | |
465 | qd = NULL; | |
466 | ||
7d80823e | 467 | spin_unlock(&qd_lock); |
b3b94faa DT |
468 | |
469 | if (qd) { | |
470 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
471 | error = bh_get(qd); | |
472 | if (error) { | |
473 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
474 | slot_put(qd); | |
475 | qd_put(qd); | |
476 | return error; | |
477 | } | |
478 | } | |
479 | ||
480 | *qdp = qd; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
b3b94faa DT |
485 | static void qd_unlock(struct gfs2_quota_data *qd) |
486 | { | |
568f4c96 SW |
487 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
488 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
489 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
490 | bh_put(qd); | |
491 | slot_put(qd); | |
492 | qd_put(qd); | |
493 | } | |
494 | ||
b59c8b6f | 495 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
496 | struct gfs2_quota_data **qdp) |
497 | { | |
498 | int error; | |
499 | ||
05e0a60d | 500 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
501 | if (error) |
502 | return error; | |
503 | ||
504 | error = slot_get(*qdp); | |
505 | if (error) | |
506 | goto fail; | |
507 | ||
508 | error = bh_get(*qdp); | |
509 | if (error) | |
510 | goto fail_slot; | |
511 | ||
512 | return 0; | |
513 | ||
a91ea69f | 514 | fail_slot: |
b3b94faa | 515 | slot_put(*qdp); |
a91ea69f | 516 | fail: |
b3b94faa DT |
517 | qd_put(*qdp); |
518 | return error; | |
519 | } | |
520 | ||
521 | static void qdsb_put(struct gfs2_quota_data *qd) | |
522 | { | |
523 | bh_put(qd); | |
524 | slot_put(qd); | |
525 | qd_put(qd); | |
526 | } | |
527 | ||
7c06b5d6 | 528 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 529 | { |
feaa7bba | 530 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 531 | struct gfs2_quota_data **qd; |
b3b94faa DT |
532 | int error; |
533 | ||
aaaf68c5 AP |
534 | if (ip->i_res == NULL) { |
535 | error = gfs2_rs_alloc(ip); | |
536 | if (error) | |
537 | return error; | |
538 | } | |
5407e242 BP |
539 | |
540 | qd = ip->i_res->rs_qa_qd; | |
541 | ||
542 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
543 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
544 | return -EIO; | |
545 | ||
546 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
547 | return 0; | |
548 | ||
b59c8b6f | 549 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
550 | if (error) |
551 | goto out; | |
5407e242 | 552 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
553 | qd++; |
554 | ||
b59c8b6f | 555 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
556 | if (error) |
557 | goto out; | |
5407e242 | 558 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
559 | qd++; |
560 | ||
6b24c0d2 EB |
561 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
562 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 563 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
564 | if (error) |
565 | goto out; | |
5407e242 | 566 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
567 | qd++; |
568 | } | |
569 | ||
6b24c0d2 EB |
570 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
571 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 572 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
573 | if (error) |
574 | goto out; | |
5407e242 | 575 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
576 | qd++; |
577 | } | |
578 | ||
a91ea69f | 579 | out: |
b3b94faa DT |
580 | if (error) |
581 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
582 | return error; |
583 | } | |
584 | ||
585 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
586 | { | |
feaa7bba | 587 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
588 | unsigned int x; |
589 | ||
5407e242 BP |
590 | if (ip->i_res == NULL) |
591 | return; | |
b3b94faa DT |
592 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
593 | ||
5407e242 BP |
594 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
595 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
596 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 597 | } |
5407e242 | 598 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
599 | } |
600 | ||
601 | static int sort_qd(const void *a, const void *b) | |
602 | { | |
48fac179 SW |
603 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
604 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 605 | |
05e0a60d | 606 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 607 | return -1; |
05e0a60d | 608 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 609 | return 1; |
48fac179 | 610 | return 0; |
b3b94faa DT |
611 | } |
612 | ||
cd915493 | 613 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
614 | { |
615 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 616 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 617 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 618 | s64 x; |
b3b94faa | 619 | |
f55ab26a | 620 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 621 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
622 | |
623 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
624 | qc->qc_change = 0; | |
625 | qc->qc_flags = 0; | |
05e0a60d | 626 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 627 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 628 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
629 | } |
630 | ||
b44b84d7 | 631 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
632 | qc->qc_change = cpu_to_be64(x); |
633 | ||
7d80823e | 634 | spin_lock(&qd_lock); |
b3b94faa | 635 | qd->qd_change = x; |
7d80823e | 636 | spin_unlock(&qd_lock); |
b3b94faa DT |
637 | |
638 | if (!x) { | |
639 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
640 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
641 | qc->qc_flags = 0; | |
642 | qc->qc_id = 0; | |
643 | slot_put(qd); | |
644 | qd_put(qd); | |
645 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
646 | qd_hold(qd); | |
647 | slot_hold(qd); | |
648 | } | |
907b9bce | 649 | |
f55ab26a | 650 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
651 | } |
652 | ||
18ec7d5c | 653 | /** |
1e72c0f7 SW |
654 | * gfs2_adjust_quota - adjust record of current block usage |
655 | * @ip: The quota inode | |
656 | * @loc: Offset of the entry in the quota file | |
e285c100 | 657 | * @change: The amount of usage change to record |
1e72c0f7 | 658 | * @qd: The quota data |
e285c100 | 659 | * @fdq: The updated limits to record |
18ec7d5c SW |
660 | * |
661 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
662 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
663 | * |
664 | * Returns: 0 or -ve on error | |
18ec7d5c | 665 | */ |
1e72c0f7 | 666 | |
18ec7d5c | 667 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
668 | s64 change, struct gfs2_quota_data *qd, |
669 | struct fs_disk_quota *fdq) | |
18ec7d5c | 670 | { |
feaa7bba | 671 | struct inode *inode = &ip->i_inode; |
14870b45 | 672 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
673 | struct address_space *mapping = inode->i_mapping; |
674 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 675 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 676 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 677 | struct buffer_head *bh; |
18ec7d5c | 678 | struct page *page; |
7e619bc3 | 679 | void *kaddr, *ptr; |
951b4bd5 | 680 | struct gfs2_quota q; |
7e619bc3 | 681 | int err, nbytes; |
e285c100 | 682 | u64 size; |
18ec7d5c | 683 | |
891a8e93 SW |
684 | if (gfs2_is_stuffed(ip)) { |
685 | err = gfs2_unstuff_dinode(ip, NULL); | |
686 | if (err) | |
687 | return err; | |
688 | } | |
7e619bc3 AD |
689 | |
690 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 691 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
692 | if (err < 0) |
693 | return err; | |
694 | ||
695 | err = -EIO; | |
951b4bd5 AV |
696 | be64_add_cpu(&q.qu_value, change); |
697 | qd->qd_qb.qb_value = q.qu_value; | |
7e619bc3 AD |
698 | if (fdq) { |
699 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
951b4bd5 AV |
700 | q.qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
701 | qd->qd_qb.qb_warn = q.qu_warn; | |
7e619bc3 AD |
702 | } |
703 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
951b4bd5 AV |
704 | q.qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
705 | qd->qd_qb.qb_limit = q.qu_limit; | |
7e619bc3 | 706 | } |
802ec9b6 | 707 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
951b4bd5 AV |
708 | q.qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); |
709 | qd->qd_qb.qb_value = q.qu_value; | |
802ec9b6 | 710 | } |
7e619bc3 AD |
711 | } |
712 | ||
713 | /* Write the quota into the quota file on disk */ | |
951b4bd5 | 714 | ptr = &q; |
7e619bc3 AD |
715 | nbytes = sizeof(struct gfs2_quota); |
716 | get_a_page: | |
220cca2a | 717 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
718 | if (!page) |
719 | return -ENOMEM; | |
720 | ||
721 | blocksize = inode->i_sb->s_blocksize; | |
722 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
723 | ||
724 | if (!page_has_buffers(page)) | |
725 | create_empty_buffers(page, blocksize, 0); | |
726 | ||
727 | bh = page_buffers(page); | |
728 | pos = blocksize; | |
729 | while (offset >= pos) { | |
730 | bh = bh->b_this_page; | |
731 | iblock++; | |
732 | pos += blocksize; | |
733 | } | |
734 | ||
735 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 736 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 737 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
738 | goto unlock_out; |
739 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
740 | if (buffer_new(bh)) |
741 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
742 | } |
743 | ||
744 | if (PageUptodate(page)) | |
745 | set_buffer_uptodate(bh); | |
746 | ||
747 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 748 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
749 | wait_on_buffer(bh); |
750 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 751 | goto unlock_out; |
18ec7d5c SW |
752 | } |
753 | ||
37f71577 | 754 | gfs2_trans_add_data(ip->i_gl, bh); |
18ec7d5c | 755 | |
d9349285 | 756 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
757 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
758 | nbytes = PAGE_CACHE_SIZE - offset; | |
759 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 760 | flush_dcache_page(page); |
d9349285 | 761 | kunmap_atomic(kaddr); |
7e619bc3 AD |
762 | unlock_page(page); |
763 | page_cache_release(page); | |
764 | ||
765 | /* If quota straddles page boundary, we need to update the rest of the | |
766 | * quota at the beginning of the next page */ | |
8b421601 | 767 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
768 | ptr = ptr + nbytes; |
769 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
770 | offset = 0; | |
771 | index++; | |
772 | goto get_a_page; | |
773 | } | |
e285c100 | 774 | |
e285c100 | 775 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 776 | if (size > inode->i_size) |
e285c100 | 777 | i_size_write(inode, size); |
e285c100 | 778 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 779 | mark_inode_dirty(inode); |
500242ac | 780 | return 0; |
ab9bbda0 | 781 | |
7e619bc3 | 782 | unlock_out: |
18ec7d5c SW |
783 | unlock_page(page); |
784 | page_cache_release(page); | |
785 | return err; | |
786 | } | |
787 | ||
b3b94faa DT |
788 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
789 | { | |
790 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 791 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 792 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
793 | unsigned int data_blocks, ind_blocks; |
794 | struct gfs2_holder *ghs, i_gh; | |
795 | unsigned int qx, x; | |
796 | struct gfs2_quota_data *qd; | |
71f890f7 | 797 | unsigned reserved; |
f42faf4f | 798 | loff_t offset; |
20b95bf2 | 799 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
800 | int error; |
801 | ||
0a305e49 BP |
802 | error = gfs2_rs_alloc(ip); |
803 | if (error) | |
804 | return error; | |
805 | ||
b3b94faa DT |
806 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
807 | &data_blocks, &ind_blocks); | |
808 | ||
16c5f06f | 809 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
810 | if (!ghs) |
811 | return -ENOMEM; | |
812 | ||
813 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 814 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 815 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 816 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
817 | GL_NOCACHE, &ghs[qx]); |
818 | if (error) | |
819 | goto out; | |
820 | } | |
821 | ||
822 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
823 | if (error) | |
824 | goto out; | |
825 | ||
826 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 827 | offset = qd2offset(qda[x]); |
461cb419 BP |
828 | if (gfs2_write_alloc_required(ip, offset, |
829 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
830 | nalloc++; |
831 | } | |
832 | ||
20b95bf2 AD |
833 | /* |
834 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
835 | * block to the reservation unconditionally. If the inode | |
836 | * doesn't need unstuffing, the block will be released to the | |
837 | * rgrp since it won't be allocated during the transaction | |
838 | */ | |
7e619bc3 AD |
839 | /* +3 in the end for unstuffing block, inode size update block |
840 | * and another block in case quota straddles page boundary and | |
841 | * two blocks need to be updated instead of 1 */ | |
842 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 843 | |
71f890f7 | 844 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
845 | ap.target = reserved; |
846 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
847 | if (error) |
848 | goto out_alloc; | |
b3b94faa | 849 | |
20b95bf2 | 850 | if (nalloc) |
71f890f7 | 851 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
852 | |
853 | error = gfs2_trans_begin(sdp, blocks, 0); | |
854 | if (error) | |
855 | goto out_ipres; | |
b3b94faa DT |
856 | |
857 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
858 | qd = qda[x]; |
859 | offset = qd2offset(qd); | |
e285c100 | 860 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 861 | if (error) |
b3b94faa | 862 | goto out_end_trans; |
b3b94faa DT |
863 | |
864 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 865 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
866 | } |
867 | ||
868 | error = 0; | |
869 | ||
a91ea69f | 870 | out_end_trans: |
b3b94faa | 871 | gfs2_trans_end(sdp); |
a91ea69f | 872 | out_ipres: |
20b95bf2 | 873 | gfs2_inplace_release(ip); |
a91ea69f | 874 | out_alloc: |
b3b94faa | 875 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 876 | out: |
b3b94faa DT |
877 | while (qx--) |
878 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 879 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 880 | kfree(ghs); |
b09e593d | 881 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
882 | return error; |
883 | } | |
884 | ||
e285c100 SW |
885 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
886 | { | |
887 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
888 | struct gfs2_quota q; | |
889 | struct gfs2_quota_lvb *qlvb; | |
890 | loff_t pos; | |
891 | int error; | |
892 | ||
893 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
894 | pos = qd2offset(qd); | |
4306629e | 895 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
896 | if (error < 0) |
897 | return error; | |
898 | ||
4e2f8849 | 899 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
900 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
901 | qlvb->__pad = 0; | |
902 | qlvb->qb_limit = q.qu_limit; | |
903 | qlvb->qb_warn = q.qu_warn; | |
904 | qlvb->qb_value = q.qu_value; | |
905 | qd->qd_qb = *qlvb; | |
906 | ||
907 | return 0; | |
908 | } | |
909 | ||
b3b94faa DT |
910 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
911 | struct gfs2_holder *q_gh) | |
912 | { | |
913 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 914 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 915 | struct gfs2_holder i_gh; |
b3b94faa DT |
916 | int error; |
917 | ||
a91ea69f | 918 | restart: |
b3b94faa DT |
919 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
920 | if (error) | |
921 | return error; | |
922 | ||
4e2f8849 | 923 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 924 | |
e9fc2aa0 | 925 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 926 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
927 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
928 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
929 | if (error) |
930 | return error; | |
931 | ||
e9fc2aa0 | 932 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
933 | if (error) |
934 | goto fail; | |
935 | ||
e285c100 SW |
936 | error = update_qd(sdp, qd); |
937 | if (error) | |
1e72c0f7 | 938 | goto fail_gunlock; |
b3b94faa | 939 | |
e285c100 | 940 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
941 | gfs2_glock_dq_uninit(q_gh); |
942 | force_refresh = 0; | |
943 | goto restart; | |
b3b94faa DT |
944 | } |
945 | ||
946 | return 0; | |
947 | ||
a91ea69f | 948 | fail_gunlock: |
b3b94faa | 949 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 950 | fail: |
b3b94faa | 951 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
952 | return error; |
953 | } | |
954 | ||
7c06b5d6 | 955 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 956 | { |
feaa7bba | 957 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 958 | struct gfs2_quota_data *qd; |
b3b94faa DT |
959 | unsigned int x; |
960 | int error = 0; | |
961 | ||
891a8e93 SW |
962 | error = gfs2_quota_hold(ip, uid, gid); |
963 | if (error) | |
964 | return error; | |
b3b94faa DT |
965 | |
966 | if (capable(CAP_SYS_RESOURCE) || | |
967 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
968 | return 0; | |
969 | ||
5407e242 BP |
970 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
971 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 972 | |
5407e242 | 973 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 974 | int force = NO_FORCE; |
5407e242 | 975 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
976 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
977 | force = FORCE; | |
5407e242 | 978 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
979 | if (error) |
980 | break; | |
981 | } | |
982 | ||
983 | if (!error) | |
984 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
985 | else { | |
986 | while (x--) | |
5407e242 | 987 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
988 | gfs2_quota_unhold(ip); |
989 | } | |
990 | ||
991 | return error; | |
992 | } | |
993 | ||
994 | static int need_sync(struct gfs2_quota_data *qd) | |
995 | { | |
996 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
997 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 998 | s64 value; |
b3b94faa DT |
999 | unsigned int num, den; |
1000 | int do_sync = 1; | |
1001 | ||
1002 | if (!qd->qd_qb.qb_limit) | |
1003 | return 0; | |
1004 | ||
7d80823e | 1005 | spin_lock(&qd_lock); |
b3b94faa | 1006 | value = qd->qd_change; |
7d80823e | 1007 | spin_unlock(&qd_lock); |
b3b94faa DT |
1008 | |
1009 | spin_lock(>->gt_spin); | |
1010 | num = gt->gt_quota_scale_num; | |
1011 | den = gt->gt_quota_scale_den; | |
1012 | spin_unlock(>->gt_spin); | |
1013 | ||
1014 | if (value < 0) | |
1015 | do_sync = 0; | |
e9fc2aa0 SW |
1016 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1017 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1018 | do_sync = 0; |
1019 | else { | |
1020 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1021 | value = div_s64(value, den); |
e9fc2aa0 | 1022 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1023 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1024 | do_sync = 0; |
1025 | } | |
1026 | ||
1027 | return do_sync; | |
1028 | } | |
1029 | ||
1030 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1031 | { | |
aabd7c72 | 1032 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1033 | struct gfs2_quota_data *qda[4]; |
1034 | unsigned int count = 0; | |
1035 | unsigned int x; | |
aabd7c72 | 1036 | int found; |
b3b94faa DT |
1037 | |
1038 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1039 | goto out; | |
1040 | ||
5407e242 | 1041 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1042 | struct gfs2_quota_data *qd; |
1043 | int sync; | |
1044 | ||
5407e242 | 1045 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1046 | sync = need_sync(qd); |
1047 | ||
5407e242 | 1048 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
aabd7c72 SW |
1049 | if (!sync) |
1050 | continue; | |
1051 | ||
7d80823e | 1052 | spin_lock(&qd_lock); |
aabd7c72 | 1053 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1054 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1055 | |
1056 | if (!found) | |
1057 | continue; | |
1058 | ||
1059 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1060 | if (bh_get(qd)) { | |
1061 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1062 | slot_put(qd); | |
1063 | qd_put(qd); | |
1064 | continue; | |
1065 | } | |
b3b94faa | 1066 | |
aabd7c72 | 1067 | qda[count++] = qd; |
b3b94faa DT |
1068 | } |
1069 | ||
1070 | if (count) { | |
1071 | do_sync(count, qda); | |
1072 | for (x = 0; x < count; x++) | |
1073 | qd_unlock(qda[x]); | |
1074 | } | |
1075 | ||
a91ea69f | 1076 | out: |
b3b94faa DT |
1077 | gfs2_quota_unhold(ip); |
1078 | } | |
1079 | ||
1080 | #define MAX_LINE 256 | |
1081 | ||
1082 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1083 | { | |
1084 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1085 | |
d77d1b58 JP |
1086 | pr_info("fsid=%s: quota %s for %s %u\n", |
1087 | sdp->sd_fsname, type, | |
1088 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", | |
1089 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1090 | |
1091 | return 0; | |
1092 | } | |
1093 | ||
7c06b5d6 | 1094 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1095 | { |
feaa7bba | 1096 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1097 | struct gfs2_quota_data *qd; |
cd915493 | 1098 | s64 value; |
b3b94faa DT |
1099 | unsigned int x; |
1100 | int error = 0; | |
1101 | ||
1102 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1103 | return 0; | |
1104 | ||
1105 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1106 | return 0; | |
1107 | ||
5407e242 BP |
1108 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1109 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1110 | |
05e0a60d EB |
1111 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1112 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1113 | continue; |
1114 | ||
e9fc2aa0 | 1115 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1116 | spin_lock(&qd_lock); |
b3b94faa | 1117 | value += qd->qd_change; |
7d80823e | 1118 | spin_unlock(&qd_lock); |
b3b94faa | 1119 | |
cd915493 | 1120 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1121 | print_message(qd, "exceeded"); |
05e0a60d | 1122 | quota_send_warning(qd->qd_id, |
2ec46505 SW |
1123 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1124 | ||
b3b94faa DT |
1125 | error = -EDQUOT; |
1126 | break; | |
e9fc2aa0 | 1127 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1128 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1129 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1130 | gfs2_tune_get(sdp, |
1131 | gt_quota_warn_period) * HZ)) { | |
05e0a60d | 1132 | quota_send_warning(qd->qd_id, |
2ec46505 | 1133 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1134 | error = print_message(qd, "warning"); |
1135 | qd->qd_last_warn = jiffies; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | return error; | |
1140 | } | |
1141 | ||
cd915493 | 1142 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1143 | kuid_t uid, kgid_t gid) |
b3b94faa | 1144 | { |
b3b94faa DT |
1145 | struct gfs2_quota_data *qd; |
1146 | unsigned int x; | |
b3b94faa | 1147 | |
feaa7bba | 1148 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1149 | return; |
383f01fb | 1150 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1151 | return; |
1152 | ||
5407e242 BP |
1153 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1154 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1155 | |
05e0a60d EB |
1156 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1157 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1158 | do_qc(qd, change); |
b3b94faa DT |
1159 | } |
1160 | } | |
1161 | } | |
1162 | ||
ceed1723 | 1163 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1164 | { |
8c42d637 | 1165 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1166 | struct gfs2_quota_data **qda; |
bef292a7 | 1167 | unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder); |
b3b94faa DT |
1168 | unsigned int num_qd; |
1169 | unsigned int x; | |
1170 | int error = 0; | |
1171 | ||
b3b94faa DT |
1172 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1173 | if (!qda) | |
1174 | return -ENOMEM; | |
1175 | ||
e46c772d SW |
1176 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1177 | sdp->sd_quota_sync_gen++; | |
1178 | ||
b3b94faa DT |
1179 | do { |
1180 | num_qd = 0; | |
1181 | ||
1182 | for (;;) { | |
1183 | error = qd_fish(sdp, qda + num_qd); | |
1184 | if (error || !qda[num_qd]) | |
1185 | break; | |
1186 | if (++num_qd == max_qd) | |
1187 | break; | |
1188 | } | |
1189 | ||
1190 | if (num_qd) { | |
1191 | if (!error) | |
1192 | error = do_sync(num_qd, qda); | |
1193 | if (!error) | |
1194 | for (x = 0; x < num_qd; x++) | |
1195 | qda[x]->qd_sync_gen = | |
1196 | sdp->sd_quota_sync_gen; | |
1197 | ||
1198 | for (x = 0; x < num_qd; x++) | |
1199 | qd_unlock(qda[x]); | |
1200 | } | |
1201 | } while (!error && num_qd == max_qd); | |
1202 | ||
e46c772d | 1203 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1204 | kfree(qda); |
1205 | ||
1206 | return error; | |
1207 | } | |
1208 | ||
ed87dabc | 1209 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1210 | { |
1211 | struct gfs2_quota_data *qd; | |
1212 | struct gfs2_holder q_gh; | |
1213 | int error; | |
1214 | ||
05e0a60d | 1215 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1216 | if (error) |
1217 | return error; | |
1218 | ||
1219 | error = do_glock(qd, FORCE, &q_gh); | |
1220 | if (!error) | |
1221 | gfs2_glock_dq_uninit(&q_gh); | |
1222 | ||
1223 | qd_put(qd); | |
b3b94faa DT |
1224 | return error; |
1225 | } | |
1226 | ||
b3b94faa DT |
1227 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1228 | { | |
feaa7bba | 1229 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1230 | u64 size = i_size_read(sdp->sd_qc_inode); |
1231 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1232 | unsigned int x, slot = 0; |
1233 | unsigned int found = 0; | |
c754fbbb | 1234 | unsigned int hash; |
ee2411a8 | 1235 | unsigned int bm_size; |
cd915493 SW |
1236 | u64 dblock; |
1237 | u32 extlen = 0; | |
b3b94faa DT |
1238 | int error; |
1239 | ||
a2e0f799 | 1240 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1241 | return -EIO; |
a2e0f799 | 1242 | |
b3b94faa | 1243 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1244 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1245 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1246 | error = -ENOMEM; |
fcf10d38 | 1247 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1248 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 FF |
1249 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
1250 | __GFP_ZERO, PAGE_KERNEL); | |
b3b94faa DT |
1251 | if (!sdp->sd_quota_bitmap) |
1252 | return error; | |
1253 | ||
b3b94faa DT |
1254 | for (x = 0; x < blocks; x++) { |
1255 | struct buffer_head *bh; | |
7aed98fb | 1256 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1257 | unsigned int y; |
1258 | ||
1259 | if (!extlen) { | |
1260 | int new = 0; | |
feaa7bba | 1261 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1262 | if (error) |
1263 | goto fail; | |
1264 | } | |
b3b94faa | 1265 | error = -EIO; |
7276b3b0 SW |
1266 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1267 | if (!bh) | |
1268 | goto fail; | |
b3b94faa DT |
1269 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1270 | brelse(bh); | |
1271 | goto fail; | |
1272 | } | |
1273 | ||
7aed98fb | 1274 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1275 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1276 | y++, slot++) { |
b3b94faa | 1277 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1278 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1279 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1280 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1281 | USRQUOTA : GRPQUOTA; | |
1282 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1283 | be32_to_cpu(qc->qc_id)); | |
1284 | qc++; | |
1285 | if (!qc_change) | |
b3b94faa DT |
1286 | continue; |
1287 | ||
c754fbbb SW |
1288 | hash = gfs2_qd_hash(sdp, qc_id); |
1289 | qd = qd_alloc(hash, sdp, qc_id); | |
1290 | if (qd == NULL) { | |
b3b94faa DT |
1291 | brelse(bh); |
1292 | goto fail; | |
1293 | } | |
1294 | ||
1295 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1296 | qd->qd_change = qc_change; |
b3b94faa DT |
1297 | qd->qd_slot = slot; |
1298 | qd->qd_slot_count = 1; | |
b3b94faa | 1299 | |
7d80823e | 1300 | spin_lock(&qd_lock); |
ee2411a8 | 1301 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1302 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1303 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1304 | spin_unlock(&qd_lock); |
b3b94faa | 1305 | |
c754fbbb SW |
1306 | spin_lock_bucket(hash); |
1307 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1308 | spin_unlock_bucket(hash); | |
1309 | ||
b3b94faa DT |
1310 | found++; |
1311 | } | |
1312 | ||
1313 | brelse(bh); | |
1314 | dblock++; | |
1315 | extlen--; | |
1316 | } | |
1317 | ||
1318 | if (found) | |
1319 | fs_info(sdp, "found %u quota changes\n", found); | |
1320 | ||
1321 | return 0; | |
1322 | ||
a91ea69f | 1323 | fail: |
b3b94faa DT |
1324 | gfs2_quota_cleanup(sdp); |
1325 | return error; | |
1326 | } | |
1327 | ||
b3b94faa DT |
1328 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1329 | { | |
1330 | struct list_head *head = &sdp->sd_quota_list; | |
1331 | struct gfs2_quota_data *qd; | |
b3b94faa | 1332 | |
7d80823e | 1333 | spin_lock(&qd_lock); |
b3b94faa DT |
1334 | while (!list_empty(head)) { |
1335 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1336 | ||
b3b94faa | 1337 | list_del(&qd->qd_list); |
c754fbbb | 1338 | |
0a7ab79c | 1339 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1340 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1341 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1342 | spin_unlock(&qd_lock); |
b3b94faa | 1343 | |
c754fbbb SW |
1344 | spin_lock_bucket(qd->qd_hash); |
1345 | hlist_bl_del_rcu(&qd->qd_hlist); | |
1346 | spin_unlock_bucket(qd->qd_hash); | |
1347 | ||
8ad151c2 SW |
1348 | gfs2_assert_warn(sdp, !qd->qd_change); |
1349 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
b3b94faa DT |
1350 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
1351 | ||
f057f6cd | 1352 | gfs2_glock_put(qd->qd_gl); |
c754fbbb | 1353 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
b3b94faa | 1354 | |
7d80823e | 1355 | spin_lock(&qd_lock); |
b3b94faa | 1356 | } |
7d80823e | 1357 | spin_unlock(&qd_lock); |
b3b94faa DT |
1358 | |
1359 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1360 | ||
1361 | if (sdp->sd_quota_bitmap) { | |
ee2411a8 SW |
1362 | if (is_vmalloc_addr(sdp->sd_quota_bitmap)) |
1363 | vfree(sdp->sd_quota_bitmap); | |
1364 | else | |
1365 | kfree(sdp->sd_quota_bitmap); | |
1366 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1367 | } |
1368 | } | |
1369 | ||
37b2c837 SW |
1370 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1371 | { | |
1372 | if (error == 0 || error == -EROFS) | |
1373 | return; | |
1374 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1375 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1376 | } | |
1377 | ||
1378 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1379 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1380 | unsigned long t, unsigned long *timeo, |
1381 | unsigned int *new_timeo) | |
1382 | { | |
1383 | if (t >= *timeo) { | |
8c42d637 | 1384 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1385 | quotad_error(sdp, msg, error); |
1386 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1387 | } else { | |
1388 | *timeo -= t; | |
1389 | } | |
1390 | } | |
1391 | ||
813e0c46 SW |
1392 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1393 | { | |
1394 | struct gfs2_inode *ip; | |
1395 | ||
1396 | while(1) { | |
1397 | ip = NULL; | |
1398 | spin_lock(&sdp->sd_trunc_lock); | |
1399 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1400 | ip = list_entry(sdp->sd_trunc_list.next, | |
1401 | struct gfs2_inode, i_trunc_list); | |
1402 | list_del_init(&ip->i_trunc_list); | |
1403 | } | |
1404 | spin_unlock(&sdp->sd_trunc_lock); | |
1405 | if (ip == NULL) | |
1406 | return; | |
1407 | gfs2_glock_finish_truncate(ip); | |
1408 | } | |
1409 | } | |
1410 | ||
3d3c10f2 BM |
1411 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1412 | if (!sdp->sd_statfs_force_sync) { | |
1413 | sdp->sd_statfs_force_sync = 1; | |
1414 | wake_up(&sdp->sd_quota_wait); | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | ||
37b2c837 SW |
1419 | /** |
1420 | * gfs2_quotad - Write cached quota changes into the quota file | |
1421 | * @sdp: Pointer to GFS2 superblock | |
1422 | * | |
1423 | */ | |
1424 | ||
1425 | int gfs2_quotad(void *data) | |
1426 | { | |
1427 | struct gfs2_sbd *sdp = data; | |
1428 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1429 | unsigned long statfs_timeo = 0; | |
1430 | unsigned long quotad_timeo = 0; | |
1431 | unsigned long t = 0; | |
1432 | DEFINE_WAIT(wait); | |
813e0c46 | 1433 | int empty; |
37b2c837 SW |
1434 | |
1435 | while (!kthread_should_stop()) { | |
1436 | ||
1437 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1438 | if (sdp->sd_statfs_force_sync) { |
1439 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1440 | quotad_error(sdp, "statfs", error); | |
1441 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1442 | } | |
1443 | else | |
1444 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1445 | &statfs_timeo, | |
1446 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1447 | |
1448 | /* Update quota file */ | |
edd2e9ac | 1449 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1450 | "ad_timeo, &tune->gt_quota_quantum); |
1451 | ||
813e0c46 SW |
1452 | /* Check for & recover partially truncated inodes */ |
1453 | quotad_check_trunc_list(sdp); | |
1454 | ||
a0acae0e TH |
1455 | try_to_freeze(); |
1456 | ||
37b2c837 SW |
1457 | t = min(quotad_timeo, statfs_timeo); |
1458 | ||
7fa5d20d | 1459 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1460 | spin_lock(&sdp->sd_trunc_lock); |
1461 | empty = list_empty(&sdp->sd_trunc_list); | |
1462 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1463 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1464 | t -= schedule_timeout(t); |
1465 | else | |
1466 | t = 0; | |
37b2c837 SW |
1467 | finish_wait(&sdp->sd_quota_wait, &wait); |
1468 | } | |
1469 | ||
1470 | return 0; | |
1471 | } | |
1472 | ||
1d371b5e SW |
1473 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1474 | struct fs_quota_stat *fqs) | |
1475 | { | |
1476 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1477 | ||
1478 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1479 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1480 | |
1481 | switch (sdp->sd_args.ar_quota) { | |
1482 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1483 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1484 | /*FALLTHRU*/ |
1485 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1486 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1487 | break; |
1488 | case GFS2_QUOTA_OFF: | |
1489 | break; | |
1490 | } | |
1491 | ||
1d371b5e SW |
1492 | if (sdp->sd_quota_inode) { |
1493 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1494 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1495 | } | |
1496 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1497 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
2147dbfd | 1498 | fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru); |
1d371b5e SW |
1499 | return 0; |
1500 | } | |
1501 | ||
74a8a103 | 1502 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1503 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1504 | { |
1505 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1506 | struct gfs2_quota_lvb *qlvb; | |
1507 | struct gfs2_quota_data *qd; | |
1508 | struct gfs2_holder q_gh; | |
1509 | int error; | |
1510 | ||
1511 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1512 | ||
1513 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1514 | return -ESRCH; /* Crazy XFS error code */ | |
1515 | ||
236c64e4 EB |
1516 | if ((qid.type != USRQUOTA) && |
1517 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1518 | return -EINVAL; |
1519 | ||
05e0a60d | 1520 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1521 | if (error) |
1522 | return error; | |
1523 | error = do_glock(qd, FORCE, &q_gh); | |
1524 | if (error) | |
1525 | goto out; | |
1526 | ||
4e2f8849 | 1527 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1528 | fdq->d_version = FS_DQUOT_VERSION; |
236c64e4 | 1529 | fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1530 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1531 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1532 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1533 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1534 | |
1535 | gfs2_glock_dq_uninit(&q_gh); | |
1536 | out: | |
1537 | qd_put(qd); | |
1538 | return error; | |
1539 | } | |
1540 | ||
e285c100 | 1541 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1542 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1543 | |
74a8a103 | 1544 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1545 | struct fs_disk_quota *fdq) |
e285c100 SW |
1546 | { |
1547 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1548 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1549 | struct gfs2_quota_data *qd; | |
1550 | struct gfs2_holder q_gh, i_gh; | |
1551 | unsigned int data_blocks, ind_blocks; | |
1552 | unsigned int blocks = 0; | |
1553 | int alloc_required; | |
e285c100 SW |
1554 | loff_t offset; |
1555 | int error; | |
1556 | ||
1557 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1558 | return -ESRCH; /* Crazy XFS error code */ | |
1559 | ||
236c64e4 EB |
1560 | if ((qid.type != USRQUOTA) && |
1561 | (qid.type != GRPQUOTA)) | |
e285c100 | 1562 | return -EINVAL; |
e285c100 SW |
1563 | |
1564 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1565 | return -EINVAL; | |
e285c100 | 1566 | |
05e0a60d | 1567 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1568 | if (error) |
1569 | return error; | |
1570 | ||
0a305e49 BP |
1571 | error = gfs2_rs_alloc(ip); |
1572 | if (error) | |
1573 | goto out_put; | |
1574 | ||
e285c100 SW |
1575 | mutex_lock(&ip->i_inode.i_mutex); |
1576 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1577 | if (error) | |
0a305e49 | 1578 | goto out_unlockput; |
e285c100 SW |
1579 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1580 | if (error) | |
1581 | goto out_q; | |
1582 | ||
1583 | /* Check for existing entry, if none then alloc new blocks */ | |
1584 | error = update_qd(sdp, qd); | |
1585 | if (error) | |
1586 | goto out_i; | |
1587 | ||
1588 | /* If nothing has changed, this is a no-op */ | |
1589 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1590 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1591 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1592 | |
e285c100 | 1593 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1594 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1595 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1596 | |
1597 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1598 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1599 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1600 | ||
e285c100 SW |
1601 | if (fdq->d_fieldmask == 0) |
1602 | goto out_i; | |
1603 | ||
1604 | offset = qd2offset(qd); | |
461cb419 | 1605 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1606 | if (gfs2_is_stuffed(ip)) |
1607 | alloc_required = 1; | |
e285c100 | 1608 | if (alloc_required) { |
7b9cff46 | 1609 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1610 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1611 | &data_blocks, &ind_blocks); | |
564e12b1 | 1612 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1613 | ap.target = blocks; |
1614 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1615 | if (error) |
564e12b1 | 1616 | goto out_i; |
71f890f7 | 1617 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1618 | } |
1619 | ||
e79a46a0 AD |
1620 | /* Some quotas span block boundaries and can update two blocks, |
1621 | adding an extra block to the transaction to handle such quotas */ | |
1622 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1623 | if (error) |
1624 | goto out_release; | |
1625 | ||
1626 | /* Apply changes */ | |
1627 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1628 | ||
1629 | gfs2_trans_end(sdp); | |
1630 | out_release: | |
564e12b1 | 1631 | if (alloc_required) |
e285c100 | 1632 | gfs2_inplace_release(ip); |
e285c100 SW |
1633 | out_i: |
1634 | gfs2_glock_dq_uninit(&i_gh); | |
1635 | out_q: | |
1636 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1637 | out_unlockput: |
e285c100 | 1638 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1639 | out_put: |
e285c100 SW |
1640 | qd_put(qd); |
1641 | return error; | |
1642 | } | |
1643 | ||
cc632e7f SW |
1644 | const struct quotactl_ops gfs2_quotactl_ops = { |
1645 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1646 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1647 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1648 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1649 | }; |
c754fbbb SW |
1650 | |
1651 | void __init gfs2_quota_hash_init(void) | |
1652 | { | |
1653 | unsigned i; | |
1654 | ||
1655 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1656 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1657 | } |