Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | /* | |
11 | * Quota change tags are associated with each transaction that allocates or | |
12 | * deallocates space. Those changes are accumulated locally to each node (in a | |
13 | * per-node file) and then are periodically synced to the quota file. This | |
14 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
15 | * fuzziness in the current usage value of IDs that are being used on different | |
16 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
17 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 18 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
19 | * program to be run on node crashes or anything like that. |
20 | * | |
21 | * There are couple of knobs that let the administrator manage the quota | |
22 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
23 | * sitting on one node before being synced to the quota file. (The default is | |
24 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
25 | * of quota file syncs increases as the user moves closer to their limit. The | |
26 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
27 | * means that there is more contention between the nodes for the quota file. | |
28 | * The default value is one. This sets the maximum theoretical quota overrun | |
29 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
30 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
31 | * number greater than one makes quota syncs more frequent and reduces the | |
32 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
33 | * syncs less frequent. | |
34 | * | |
35 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
36 | * the quota file, so it is not being constantly read. | |
37 | */ | |
38 | ||
39 | #include <linux/sched.h> | |
40 | #include <linux/slab.h> | |
1495f230 | 41 | #include <linux/mm.h> |
b3b94faa DT |
42 | #include <linux/spinlock.h> |
43 | #include <linux/completion.h> | |
44 | #include <linux/buffer_head.h> | |
b3b94faa | 45 | #include <linux/sort.h> |
18ec7d5c | 46 | #include <linux/fs.h> |
2e565bb6 | 47 | #include <linux/bio.h> |
5c676f6d | 48 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
49 | #include <linux/kthread.h> |
50 | #include <linux/freezer.h> | |
2ec46505 | 51 | #include <linux/quota.h> |
1d371b5e | 52 | #include <linux/dqblk_xfs.h> |
9b9f039d | 53 | #include <linux/lockref.h> |
2147dbfd | 54 | #include <linux/list_lru.h> |
c754fbbb SW |
55 | #include <linux/rcupdate.h> |
56 | #include <linux/rculist_bl.h> | |
57 | #include <linux/bit_spinlock.h> | |
58 | #include <linux/jhash.h> | |
b3b94faa DT |
59 | |
60 | #include "gfs2.h" | |
5c676f6d | 61 | #include "incore.h" |
b3b94faa DT |
62 | #include "bmap.h" |
63 | #include "glock.h" | |
64 | #include "glops.h" | |
b3b94faa DT |
65 | #include "log.h" |
66 | #include "meta_io.h" | |
67 | #include "quota.h" | |
68 | #include "rgrp.h" | |
69 | #include "super.h" | |
70 | #include "trans.h" | |
18ec7d5c | 71 | #include "inode.h" |
5c676f6d | 72 | #include "util.h" |
b3b94faa | 73 | |
c754fbbb SW |
74 | #define GFS2_QD_HASH_SHIFT 12 |
75 | #define GFS2_QD_HASH_SIZE (1 << GFS2_QD_HASH_SHIFT) | |
76 | #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1) | |
77 | ||
78 | /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */ | |
2d9e7230 | 79 | /* -> sd_bitmap_lock */ |
7d80823e | 80 | static DEFINE_SPINLOCK(qd_lock); |
2147dbfd | 81 | struct list_lru gfs2_qd_lru; |
0a7ab79c | 82 | |
c754fbbb SW |
83 | static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE]; |
84 | ||
85 | static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp, | |
86 | const struct kqid qid) | |
87 | { | |
88 | unsigned int h; | |
89 | ||
90 | h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0); | |
91 | h = jhash(&qid, sizeof(struct kqid), h); | |
92 | ||
93 | return h & GFS2_QD_HASH_MASK; | |
94 | } | |
95 | ||
96 | static inline void spin_lock_bucket(unsigned int hash) | |
97 | { | |
98 | hlist_bl_lock(&qd_hash_table[hash]); | |
99 | } | |
100 | ||
101 | static inline void spin_unlock_bucket(unsigned int hash) | |
102 | { | |
103 | hlist_bl_unlock(&qd_hash_table[hash]); | |
104 | } | |
105 | ||
106 | static void gfs2_qd_dealloc(struct rcu_head *rcu) | |
107 | { | |
108 | struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu); | |
109 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
110 | } | |
111 | ||
2147dbfd | 112 | static void gfs2_qd_dispose(struct list_head *list) |
0a7ab79c AD |
113 | { |
114 | struct gfs2_quota_data *qd; | |
115 | struct gfs2_sbd *sdp; | |
0a7ab79c | 116 | |
2147dbfd SW |
117 | while (!list_empty(list)) { |
118 | qd = list_entry(list->next, struct gfs2_quota_data, qd_lru); | |
0a7ab79c AD |
119 | sdp = qd->qd_gl->gl_sbd; |
120 | ||
2147dbfd SW |
121 | list_del(&qd->qd_lru); |
122 | ||
0a7ab79c | 123 | /* Free from the filesystem-specific list */ |
2147dbfd | 124 | spin_lock(&qd_lock); |
0a7ab79c | 125 | list_del(&qd->qd_list); |
2147dbfd | 126 | spin_unlock(&qd_lock); |
0a7ab79c | 127 | |
c754fbbb SW |
128 | spin_lock_bucket(qd->qd_hash); |
129 | hlist_bl_del_rcu(&qd->qd_hlist); | |
130 | spin_unlock_bucket(qd->qd_hash); | |
131 | ||
0a7ab79c AD |
132 | gfs2_assert_warn(sdp, !qd->qd_change); |
133 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
134 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
135 | ||
f057f6cd | 136 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
137 | atomic_dec(&sdp->sd_quota_count); |
138 | ||
139 | /* Delete it from the common reclaim list */ | |
c754fbbb | 140 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
0a7ab79c | 141 | } |
2147dbfd SW |
142 | } |
143 | ||
144 | ||
145 | static enum lru_status gfs2_qd_isolate(struct list_head *item, spinlock_t *lock, void *arg) | |
146 | { | |
147 | struct list_head *dispose = arg; | |
148 | struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru); | |
149 | ||
150 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
151 | return LRU_SKIP; | |
152 | ||
153 | if (qd->qd_lockref.count == 0) { | |
154 | lockref_mark_dead(&qd->qd_lockref); | |
155 | list_move(&qd->qd_lru, dispose); | |
156 | } | |
157 | ||
158 | spin_unlock(&qd->qd_lockref.lock); | |
159 | return LRU_REMOVED; | |
160 | } | |
161 | ||
162 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
163 | struct shrink_control *sc) | |
164 | { | |
165 | LIST_HEAD(dispose); | |
166 | unsigned long freed; | |
167 | ||
168 | if (!(sc->gfp_mask & __GFP_FS)) | |
169 | return SHRINK_STOP; | |
170 | ||
171 | freed = list_lru_walk_node(&gfs2_qd_lru, sc->nid, gfs2_qd_isolate, | |
172 | &dispose, &sc->nr_to_scan); | |
173 | ||
174 | gfs2_qd_dispose(&dispose); | |
175 | ||
1ab6c499 DC |
176 | return freed; |
177 | } | |
0a7ab79c | 178 | |
2147dbfd SW |
179 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
180 | struct shrink_control *sc) | |
1ab6c499 | 181 | { |
2147dbfd | 182 | return vfs_pressure_ratio(list_lru_count_node(&gfs2_qd_lru, sc->nid)); |
0a7ab79c AD |
183 | } |
184 | ||
2147dbfd SW |
185 | struct shrinker gfs2_qd_shrinker = { |
186 | .count_objects = gfs2_qd_shrink_count, | |
187 | .scan_objects = gfs2_qd_shrink_scan, | |
188 | .seeks = DEFAULT_SEEKS, | |
189 | .flags = SHRINKER_NUMA_AWARE, | |
190 | }; | |
191 | ||
192 | ||
2f6c9896 EB |
193 | static u64 qd2index(struct gfs2_quota_data *qd) |
194 | { | |
05e0a60d EB |
195 | struct kqid qid = qd->qd_id; |
196 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 197 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
198 | } |
199 | ||
cd915493 | 200 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 201 | { |
cd915493 | 202 | u64 offset; |
b3b94faa | 203 | |
2f6c9896 | 204 | offset = qd2index(qd); |
b3b94faa DT |
205 | offset *= sizeof(struct gfs2_quota); |
206 | ||
207 | return offset; | |
208 | } | |
209 | ||
c754fbbb | 210 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
211 | { |
212 | struct gfs2_quota_data *qd; | |
213 | int error; | |
214 | ||
37b2c837 | 215 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 216 | if (!qd) |
c754fbbb | 217 | return NULL; |
b3b94faa | 218 | |
c754fbbb | 219 | qd->qd_sbd = sdp; |
9b9f039d SW |
220 | qd->qd_lockref.count = 1; |
221 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 222 | qd->qd_id = qid; |
b3b94faa | 223 | qd->qd_slot = -1; |
2147dbfd | 224 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 225 | qd->qd_hash = hash; |
b3b94faa | 226 | |
2f6c9896 | 227 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
228 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
229 | if (error) | |
230 | goto fail; | |
231 | ||
c754fbbb | 232 | return qd; |
b3b94faa | 233 | |
a91ea69f | 234 | fail: |
37b2c837 | 235 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 236 | return NULL; |
b3b94faa DT |
237 | } |
238 | ||
c754fbbb SW |
239 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
240 | const struct gfs2_sbd *sdp, | |
241 | struct kqid qid) | |
b3b94faa | 242 | { |
c754fbbb SW |
243 | struct gfs2_quota_data *qd; |
244 | struct hlist_bl_node *h; | |
b3b94faa | 245 | |
c754fbbb SW |
246 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
247 | if (!qid_eq(qd->qd_id, qid)) | |
248 | continue; | |
249 | if (qd->qd_sbd != sdp) | |
250 | continue; | |
251 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
252 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
253 | return qd; | |
b3b94faa | 254 | } |
c754fbbb | 255 | } |
b3b94faa | 256 | |
c754fbbb SW |
257 | return NULL; |
258 | } | |
b3b94faa | 259 | |
b3b94faa | 260 | |
c754fbbb SW |
261 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
262 | struct gfs2_quota_data **qdp) | |
263 | { | |
264 | struct gfs2_quota_data *qd, *new_qd; | |
265 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 266 | |
c754fbbb SW |
267 | rcu_read_lock(); |
268 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
269 | rcu_read_unlock(); | |
b3b94faa | 270 | |
c754fbbb SW |
271 | if (qd) |
272 | return 0; | |
273 | ||
274 | new_qd = qd_alloc(hash, sdp, qid); | |
275 | if (!new_qd) | |
276 | return -ENOMEM; | |
277 | ||
278 | spin_lock(&qd_lock); | |
279 | spin_lock_bucket(hash); | |
280 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
281 | if (qd == NULL) { | |
282 | *qdp = new_qd; | |
283 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
284 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
285 | atomic_inc(&sdp->sd_quota_count); | |
286 | } | |
287 | spin_unlock_bucket(hash); | |
288 | spin_unlock(&qd_lock); | |
289 | ||
290 | if (qd) { | |
291 | gfs2_glock_put(new_qd->qd_gl); | |
292 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 293 | } |
c754fbbb SW |
294 | |
295 | return 0; | |
b3b94faa DT |
296 | } |
297 | ||
c754fbbb | 298 | |
b3b94faa DT |
299 | static void qd_hold(struct gfs2_quota_data *qd) |
300 | { | |
301 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
9b9f039d SW |
302 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
303 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
304 | } |
305 | ||
306 | static void qd_put(struct gfs2_quota_data *qd) | |
307 | { | |
2147dbfd SW |
308 | if (lockref_put_or_lock(&qd->qd_lockref)) |
309 | return; | |
9b9f039d | 310 | |
2147dbfd SW |
311 | qd->qd_lockref.count = 0; |
312 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
313 | spin_unlock(&qd->qd_lockref.lock); | |
9b9f039d | 314 | |
b3b94faa DT |
315 | } |
316 | ||
317 | static int slot_get(struct gfs2_quota_data *qd) | |
318 | { | |
ee2411a8 SW |
319 | struct gfs2_sbd *sdp = qd->qd_sbd; |
320 | unsigned int bit; | |
321 | int error = 0; | |
b3b94faa | 322 | |
2d9e7230 | 323 | spin_lock(&sdp->sd_bitmap_lock); |
ee2411a8 SW |
324 | if (qd->qd_slot_count != 0) |
325 | goto out; | |
b3b94faa | 326 | |
ee2411a8 SW |
327 | error = -ENOSPC; |
328 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots); | |
329 | if (bit < sdp->sd_quota_slots) { | |
330 | set_bit(bit, sdp->sd_quota_bitmap); | |
331 | qd->qd_slot = bit; | |
332 | out: | |
333 | qd->qd_slot_count++; | |
b3b94faa | 334 | } |
2d9e7230 | 335 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa | 336 | |
ee2411a8 | 337 | return error; |
b3b94faa DT |
338 | } |
339 | ||
340 | static void slot_hold(struct gfs2_quota_data *qd) | |
341 | { | |
ee2411a8 | 342 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 343 | |
2d9e7230 | 344 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
345 | gfs2_assert(sdp, qd->qd_slot_count); |
346 | qd->qd_slot_count++; | |
2d9e7230 | 347 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
348 | } |
349 | ||
350 | static void slot_put(struct gfs2_quota_data *qd) | |
351 | { | |
ee2411a8 | 352 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 353 | |
2d9e7230 | 354 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
355 | gfs2_assert(sdp, qd->qd_slot_count); |
356 | if (!--qd->qd_slot_count) { | |
ee2411a8 | 357 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
358 | qd->qd_slot = -1; |
359 | } | |
2d9e7230 | 360 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
361 | } |
362 | ||
363 | static int bh_get(struct gfs2_quota_data *qd) | |
364 | { | |
365 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 366 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 367 | unsigned int block, offset; |
b3b94faa DT |
368 | struct buffer_head *bh; |
369 | int error; | |
23591256 | 370 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 371 | |
f55ab26a | 372 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
373 | |
374 | if (qd->qd_bh_count++) { | |
f55ab26a | 375 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
376 | return 0; |
377 | } | |
378 | ||
379 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 380 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 381 | |
23591256 | 382 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 383 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
384 | if (error) |
385 | goto fail; | |
7276b3b0 | 386 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
387 | if (error) |
388 | goto fail; | |
389 | error = -EIO; | |
390 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
391 | goto fail_brelse; | |
392 | ||
393 | qd->qd_bh = bh; | |
394 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
395 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
396 | offset * sizeof(struct gfs2_quota_change)); | |
397 | ||
2e95b665 | 398 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
399 | |
400 | return 0; | |
401 | ||
a91ea69f | 402 | fail_brelse: |
b3b94faa | 403 | brelse(bh); |
a91ea69f | 404 | fail: |
b3b94faa | 405 | qd->qd_bh_count--; |
f55ab26a | 406 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
407 | return error; |
408 | } | |
409 | ||
410 | static void bh_put(struct gfs2_quota_data *qd) | |
411 | { | |
412 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
413 | ||
f55ab26a | 414 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
415 | gfs2_assert(sdp, qd->qd_bh_count); |
416 | if (!--qd->qd_bh_count) { | |
417 | brelse(qd->qd_bh); | |
418 | qd->qd_bh = NULL; | |
419 | qd->qd_bh_qc = NULL; | |
420 | } | |
f55ab26a | 421 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
422 | } |
423 | ||
1bf59bf6 SW |
424 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
425 | u64 *sync_gen) | |
426 | { | |
427 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
428 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
429 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
430 | return 0; | |
431 | ||
2147dbfd SW |
432 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
433 | return 0; | |
1bf59bf6 | 434 | |
2147dbfd | 435 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 436 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 437 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 438 | slot_hold(qd); |
1bf59bf6 SW |
439 | return 1; |
440 | } | |
441 | ||
b3b94faa DT |
442 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
443 | { | |
444 | struct gfs2_quota_data *qd = NULL; | |
445 | int error; | |
446 | int found = 0; | |
447 | ||
448 | *qdp = NULL; | |
449 | ||
450 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
451 | return 0; | |
452 | ||
7d80823e | 453 | spin_lock(&qd_lock); |
b3b94faa DT |
454 | |
455 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
456 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
457 | if (found) | |
458 | break; | |
b3b94faa DT |
459 | } |
460 | ||
461 | if (!found) | |
462 | qd = NULL; | |
463 | ||
7d80823e | 464 | spin_unlock(&qd_lock); |
b3b94faa DT |
465 | |
466 | if (qd) { | |
467 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
468 | error = bh_get(qd); | |
469 | if (error) { | |
470 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
471 | slot_put(qd); | |
472 | qd_put(qd); | |
473 | return error; | |
474 | } | |
475 | } | |
476 | ||
477 | *qdp = qd; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
b3b94faa DT |
482 | static void qd_unlock(struct gfs2_quota_data *qd) |
483 | { | |
568f4c96 SW |
484 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
485 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
486 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
487 | bh_put(qd); | |
488 | slot_put(qd); | |
489 | qd_put(qd); | |
490 | } | |
491 | ||
b59c8b6f | 492 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
493 | struct gfs2_quota_data **qdp) |
494 | { | |
495 | int error; | |
496 | ||
05e0a60d | 497 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
498 | if (error) |
499 | return error; | |
500 | ||
501 | error = slot_get(*qdp); | |
502 | if (error) | |
503 | goto fail; | |
504 | ||
505 | error = bh_get(*qdp); | |
506 | if (error) | |
507 | goto fail_slot; | |
508 | ||
509 | return 0; | |
510 | ||
a91ea69f | 511 | fail_slot: |
b3b94faa | 512 | slot_put(*qdp); |
a91ea69f | 513 | fail: |
b3b94faa DT |
514 | qd_put(*qdp); |
515 | return error; | |
516 | } | |
517 | ||
518 | static void qdsb_put(struct gfs2_quota_data *qd) | |
519 | { | |
520 | bh_put(qd); | |
521 | slot_put(qd); | |
522 | qd_put(qd); | |
523 | } | |
524 | ||
7c06b5d6 | 525 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 526 | { |
feaa7bba | 527 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 528 | struct gfs2_quota_data **qd; |
b3b94faa DT |
529 | int error; |
530 | ||
aaaf68c5 AP |
531 | if (ip->i_res == NULL) { |
532 | error = gfs2_rs_alloc(ip); | |
533 | if (error) | |
534 | return error; | |
535 | } | |
5407e242 BP |
536 | |
537 | qd = ip->i_res->rs_qa_qd; | |
538 | ||
539 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
540 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
541 | return -EIO; | |
542 | ||
543 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
544 | return 0; | |
545 | ||
b59c8b6f | 546 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
547 | if (error) |
548 | goto out; | |
5407e242 | 549 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
550 | qd++; |
551 | ||
b59c8b6f | 552 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
553 | if (error) |
554 | goto out; | |
5407e242 | 555 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
556 | qd++; |
557 | ||
6b24c0d2 EB |
558 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
559 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 560 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
561 | if (error) |
562 | goto out; | |
5407e242 | 563 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
564 | qd++; |
565 | } | |
566 | ||
6b24c0d2 EB |
567 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
568 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 569 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
570 | if (error) |
571 | goto out; | |
5407e242 | 572 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
573 | qd++; |
574 | } | |
575 | ||
a91ea69f | 576 | out: |
b3b94faa DT |
577 | if (error) |
578 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
579 | return error; |
580 | } | |
581 | ||
582 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
583 | { | |
feaa7bba | 584 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
585 | unsigned int x; |
586 | ||
5407e242 BP |
587 | if (ip->i_res == NULL) |
588 | return; | |
b3b94faa DT |
589 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
590 | ||
5407e242 BP |
591 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
592 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
593 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 594 | } |
5407e242 | 595 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
596 | } |
597 | ||
598 | static int sort_qd(const void *a, const void *b) | |
599 | { | |
48fac179 SW |
600 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
601 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 602 | |
05e0a60d | 603 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 604 | return -1; |
05e0a60d | 605 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 606 | return 1; |
48fac179 | 607 | return 0; |
b3b94faa DT |
608 | } |
609 | ||
cd915493 | 610 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
611 | { |
612 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 613 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 614 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 615 | s64 x; |
b3b94faa | 616 | |
f55ab26a | 617 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 618 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
619 | |
620 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
621 | qc->qc_change = 0; | |
622 | qc->qc_flags = 0; | |
05e0a60d | 623 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 624 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 625 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
626 | } |
627 | ||
b44b84d7 | 628 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
629 | qc->qc_change = cpu_to_be64(x); |
630 | ||
7d80823e | 631 | spin_lock(&qd_lock); |
b3b94faa | 632 | qd->qd_change = x; |
7d80823e | 633 | spin_unlock(&qd_lock); |
b3b94faa DT |
634 | |
635 | if (!x) { | |
636 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
637 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
638 | qc->qc_flags = 0; | |
639 | qc->qc_id = 0; | |
640 | slot_put(qd); | |
641 | qd_put(qd); | |
642 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
643 | qd_hold(qd); | |
644 | slot_hold(qd); | |
645 | } | |
907b9bce | 646 | |
f55ab26a | 647 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
648 | } |
649 | ||
18ec7d5c | 650 | /** |
1e72c0f7 SW |
651 | * gfs2_adjust_quota - adjust record of current block usage |
652 | * @ip: The quota inode | |
653 | * @loc: Offset of the entry in the quota file | |
e285c100 | 654 | * @change: The amount of usage change to record |
1e72c0f7 | 655 | * @qd: The quota data |
e285c100 | 656 | * @fdq: The updated limits to record |
18ec7d5c SW |
657 | * |
658 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
659 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
660 | * |
661 | * Returns: 0 or -ve on error | |
18ec7d5c | 662 | */ |
1e72c0f7 | 663 | |
18ec7d5c | 664 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
665 | s64 change, struct gfs2_quota_data *qd, |
666 | struct fs_disk_quota *fdq) | |
18ec7d5c | 667 | { |
feaa7bba | 668 | struct inode *inode = &ip->i_inode; |
14870b45 | 669 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
670 | struct address_space *mapping = inode->i_mapping; |
671 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 672 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 673 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 674 | struct buffer_head *bh; |
18ec7d5c | 675 | struct page *page; |
7e619bc3 | 676 | void *kaddr, *ptr; |
951b4bd5 | 677 | struct gfs2_quota q; |
7e619bc3 | 678 | int err, nbytes; |
e285c100 | 679 | u64 size; |
18ec7d5c | 680 | |
891a8e93 SW |
681 | if (gfs2_is_stuffed(ip)) { |
682 | err = gfs2_unstuff_dinode(ip, NULL); | |
683 | if (err) | |
684 | return err; | |
685 | } | |
7e619bc3 AD |
686 | |
687 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 688 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
689 | if (err < 0) |
690 | return err; | |
691 | ||
692 | err = -EIO; | |
951b4bd5 AV |
693 | be64_add_cpu(&q.qu_value, change); |
694 | qd->qd_qb.qb_value = q.qu_value; | |
7e619bc3 AD |
695 | if (fdq) { |
696 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
951b4bd5 AV |
697 | q.qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
698 | qd->qd_qb.qb_warn = q.qu_warn; | |
7e619bc3 AD |
699 | } |
700 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
951b4bd5 AV |
701 | q.qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
702 | qd->qd_qb.qb_limit = q.qu_limit; | |
7e619bc3 | 703 | } |
802ec9b6 | 704 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
951b4bd5 AV |
705 | q.qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); |
706 | qd->qd_qb.qb_value = q.qu_value; | |
802ec9b6 | 707 | } |
7e619bc3 AD |
708 | } |
709 | ||
710 | /* Write the quota into the quota file on disk */ | |
951b4bd5 | 711 | ptr = &q; |
7e619bc3 AD |
712 | nbytes = sizeof(struct gfs2_quota); |
713 | get_a_page: | |
220cca2a | 714 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
715 | if (!page) |
716 | return -ENOMEM; | |
717 | ||
718 | blocksize = inode->i_sb->s_blocksize; | |
719 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
720 | ||
721 | if (!page_has_buffers(page)) | |
722 | create_empty_buffers(page, blocksize, 0); | |
723 | ||
724 | bh = page_buffers(page); | |
725 | pos = blocksize; | |
726 | while (offset >= pos) { | |
727 | bh = bh->b_this_page; | |
728 | iblock++; | |
729 | pos += blocksize; | |
730 | } | |
731 | ||
732 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 733 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 734 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
735 | goto unlock_out; |
736 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
737 | if (buffer_new(bh)) |
738 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
739 | } |
740 | ||
741 | if (PageUptodate(page)) | |
742 | set_buffer_uptodate(bh); | |
743 | ||
744 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 745 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
746 | wait_on_buffer(bh); |
747 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 748 | goto unlock_out; |
18ec7d5c SW |
749 | } |
750 | ||
37f71577 | 751 | gfs2_trans_add_data(ip->i_gl, bh); |
18ec7d5c | 752 | |
d9349285 | 753 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
754 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
755 | nbytes = PAGE_CACHE_SIZE - offset; | |
756 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 757 | flush_dcache_page(page); |
d9349285 | 758 | kunmap_atomic(kaddr); |
7e619bc3 AD |
759 | unlock_page(page); |
760 | page_cache_release(page); | |
761 | ||
762 | /* If quota straddles page boundary, we need to update the rest of the | |
763 | * quota at the beginning of the next page */ | |
8b421601 | 764 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
765 | ptr = ptr + nbytes; |
766 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
767 | offset = 0; | |
768 | index++; | |
769 | goto get_a_page; | |
770 | } | |
e285c100 | 771 | |
e285c100 | 772 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 773 | if (size > inode->i_size) |
e285c100 | 774 | i_size_write(inode, size); |
e285c100 | 775 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 776 | mark_inode_dirty(inode); |
500242ac | 777 | return 0; |
ab9bbda0 | 778 | |
7e619bc3 | 779 | unlock_out: |
18ec7d5c SW |
780 | unlock_page(page); |
781 | page_cache_release(page); | |
782 | return err; | |
783 | } | |
784 | ||
b3b94faa DT |
785 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
786 | { | |
787 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 788 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 789 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
790 | unsigned int data_blocks, ind_blocks; |
791 | struct gfs2_holder *ghs, i_gh; | |
792 | unsigned int qx, x; | |
793 | struct gfs2_quota_data *qd; | |
71f890f7 | 794 | unsigned reserved; |
f42faf4f | 795 | loff_t offset; |
20b95bf2 | 796 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
797 | int error; |
798 | ||
0a305e49 BP |
799 | error = gfs2_rs_alloc(ip); |
800 | if (error) | |
801 | return error; | |
802 | ||
b3b94faa DT |
803 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
804 | &data_blocks, &ind_blocks); | |
805 | ||
16c5f06f | 806 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
807 | if (!ghs) |
808 | return -ENOMEM; | |
809 | ||
810 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 811 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 812 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 813 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
814 | GL_NOCACHE, &ghs[qx]); |
815 | if (error) | |
816 | goto out; | |
817 | } | |
818 | ||
819 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
820 | if (error) | |
821 | goto out; | |
822 | ||
823 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 824 | offset = qd2offset(qda[x]); |
461cb419 BP |
825 | if (gfs2_write_alloc_required(ip, offset, |
826 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
827 | nalloc++; |
828 | } | |
829 | ||
20b95bf2 AD |
830 | /* |
831 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
832 | * block to the reservation unconditionally. If the inode | |
833 | * doesn't need unstuffing, the block will be released to the | |
834 | * rgrp since it won't be allocated during the transaction | |
835 | */ | |
7e619bc3 AD |
836 | /* +3 in the end for unstuffing block, inode size update block |
837 | * and another block in case quota straddles page boundary and | |
838 | * two blocks need to be updated instead of 1 */ | |
839 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 840 | |
71f890f7 | 841 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
842 | ap.target = reserved; |
843 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
844 | if (error) |
845 | goto out_alloc; | |
b3b94faa | 846 | |
20b95bf2 | 847 | if (nalloc) |
71f890f7 | 848 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
849 | |
850 | error = gfs2_trans_begin(sdp, blocks, 0); | |
851 | if (error) | |
852 | goto out_ipres; | |
b3b94faa DT |
853 | |
854 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
855 | qd = qda[x]; |
856 | offset = qd2offset(qd); | |
e285c100 | 857 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 858 | if (error) |
b3b94faa | 859 | goto out_end_trans; |
b3b94faa DT |
860 | |
861 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 862 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
863 | } |
864 | ||
865 | error = 0; | |
866 | ||
a91ea69f | 867 | out_end_trans: |
b3b94faa | 868 | gfs2_trans_end(sdp); |
a91ea69f | 869 | out_ipres: |
20b95bf2 | 870 | gfs2_inplace_release(ip); |
a91ea69f | 871 | out_alloc: |
b3b94faa | 872 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 873 | out: |
b3b94faa DT |
874 | while (qx--) |
875 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 876 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 877 | kfree(ghs); |
b09e593d | 878 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
879 | return error; |
880 | } | |
881 | ||
e285c100 SW |
882 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
883 | { | |
884 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
885 | struct gfs2_quota q; | |
886 | struct gfs2_quota_lvb *qlvb; | |
887 | loff_t pos; | |
888 | int error; | |
889 | ||
890 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
891 | pos = qd2offset(qd); | |
4306629e | 892 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
893 | if (error < 0) |
894 | return error; | |
895 | ||
4e2f8849 | 896 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
897 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
898 | qlvb->__pad = 0; | |
899 | qlvb->qb_limit = q.qu_limit; | |
900 | qlvb->qb_warn = q.qu_warn; | |
901 | qlvb->qb_value = q.qu_value; | |
902 | qd->qd_qb = *qlvb; | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
b3b94faa DT |
907 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
908 | struct gfs2_holder *q_gh) | |
909 | { | |
910 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 911 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 912 | struct gfs2_holder i_gh; |
b3b94faa DT |
913 | int error; |
914 | ||
a91ea69f | 915 | restart: |
b3b94faa DT |
916 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
917 | if (error) | |
918 | return error; | |
919 | ||
4e2f8849 | 920 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 921 | |
e9fc2aa0 | 922 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 923 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
924 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
925 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
926 | if (error) |
927 | return error; | |
928 | ||
e9fc2aa0 | 929 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
930 | if (error) |
931 | goto fail; | |
932 | ||
e285c100 SW |
933 | error = update_qd(sdp, qd); |
934 | if (error) | |
1e72c0f7 | 935 | goto fail_gunlock; |
b3b94faa | 936 | |
e285c100 | 937 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
938 | gfs2_glock_dq_uninit(q_gh); |
939 | force_refresh = 0; | |
940 | goto restart; | |
b3b94faa DT |
941 | } |
942 | ||
943 | return 0; | |
944 | ||
a91ea69f | 945 | fail_gunlock: |
b3b94faa | 946 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 947 | fail: |
b3b94faa | 948 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
949 | return error; |
950 | } | |
951 | ||
7c06b5d6 | 952 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 953 | { |
feaa7bba | 954 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 955 | struct gfs2_quota_data *qd; |
b3b94faa DT |
956 | unsigned int x; |
957 | int error = 0; | |
958 | ||
891a8e93 SW |
959 | error = gfs2_quota_hold(ip, uid, gid); |
960 | if (error) | |
961 | return error; | |
b3b94faa DT |
962 | |
963 | if (capable(CAP_SYS_RESOURCE) || | |
964 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
965 | return 0; | |
966 | ||
5407e242 BP |
967 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
968 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 969 | |
5407e242 | 970 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 971 | int force = NO_FORCE; |
5407e242 | 972 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
973 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
974 | force = FORCE; | |
5407e242 | 975 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
976 | if (error) |
977 | break; | |
978 | } | |
979 | ||
980 | if (!error) | |
981 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
982 | else { | |
983 | while (x--) | |
5407e242 | 984 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
985 | gfs2_quota_unhold(ip); |
986 | } | |
987 | ||
988 | return error; | |
989 | } | |
990 | ||
991 | static int need_sync(struct gfs2_quota_data *qd) | |
992 | { | |
993 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
994 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 995 | s64 value; |
b3b94faa DT |
996 | unsigned int num, den; |
997 | int do_sync = 1; | |
998 | ||
999 | if (!qd->qd_qb.qb_limit) | |
1000 | return 0; | |
1001 | ||
7d80823e | 1002 | spin_lock(&qd_lock); |
b3b94faa | 1003 | value = qd->qd_change; |
7d80823e | 1004 | spin_unlock(&qd_lock); |
b3b94faa DT |
1005 | |
1006 | spin_lock(>->gt_spin); | |
1007 | num = gt->gt_quota_scale_num; | |
1008 | den = gt->gt_quota_scale_den; | |
1009 | spin_unlock(>->gt_spin); | |
1010 | ||
1011 | if (value < 0) | |
1012 | do_sync = 0; | |
e9fc2aa0 SW |
1013 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1014 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1015 | do_sync = 0; |
1016 | else { | |
1017 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1018 | value = div_s64(value, den); |
e9fc2aa0 | 1019 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1020 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1021 | do_sync = 0; |
1022 | } | |
1023 | ||
1024 | return do_sync; | |
1025 | } | |
1026 | ||
1027 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1028 | { | |
aabd7c72 | 1029 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1030 | struct gfs2_quota_data *qda[4]; |
1031 | unsigned int count = 0; | |
1032 | unsigned int x; | |
aabd7c72 | 1033 | int found; |
b3b94faa DT |
1034 | |
1035 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1036 | goto out; | |
1037 | ||
5407e242 | 1038 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1039 | struct gfs2_quota_data *qd; |
1040 | int sync; | |
1041 | ||
5407e242 | 1042 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1043 | sync = need_sync(qd); |
1044 | ||
5407e242 | 1045 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
aabd7c72 SW |
1046 | if (!sync) |
1047 | continue; | |
1048 | ||
7d80823e | 1049 | spin_lock(&qd_lock); |
aabd7c72 | 1050 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1051 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1052 | |
1053 | if (!found) | |
1054 | continue; | |
1055 | ||
1056 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1057 | if (bh_get(qd)) { | |
1058 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1059 | slot_put(qd); | |
1060 | qd_put(qd); | |
1061 | continue; | |
1062 | } | |
b3b94faa | 1063 | |
aabd7c72 | 1064 | qda[count++] = qd; |
b3b94faa DT |
1065 | } |
1066 | ||
1067 | if (count) { | |
1068 | do_sync(count, qda); | |
1069 | for (x = 0; x < count; x++) | |
1070 | qd_unlock(qda[x]); | |
1071 | } | |
1072 | ||
a91ea69f | 1073 | out: |
b3b94faa DT |
1074 | gfs2_quota_unhold(ip); |
1075 | } | |
1076 | ||
1077 | #define MAX_LINE 256 | |
1078 | ||
1079 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1080 | { | |
1081 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1082 | |
2ec46505 | 1083 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 | 1084 | sdp->sd_fsname, type, |
05e0a60d EB |
1085 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1086 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1087 | |
1088 | return 0; | |
1089 | } | |
1090 | ||
7c06b5d6 | 1091 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1092 | { |
feaa7bba | 1093 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1094 | struct gfs2_quota_data *qd; |
cd915493 | 1095 | s64 value; |
b3b94faa DT |
1096 | unsigned int x; |
1097 | int error = 0; | |
1098 | ||
1099 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1100 | return 0; | |
1101 | ||
1102 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1103 | return 0; | |
1104 | ||
5407e242 BP |
1105 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1106 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1107 | |
05e0a60d EB |
1108 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1109 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1110 | continue; |
1111 | ||
e9fc2aa0 | 1112 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1113 | spin_lock(&qd_lock); |
b3b94faa | 1114 | value += qd->qd_change; |
7d80823e | 1115 | spin_unlock(&qd_lock); |
b3b94faa | 1116 | |
cd915493 | 1117 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1118 | print_message(qd, "exceeded"); |
05e0a60d | 1119 | quota_send_warning(qd->qd_id, |
2ec46505 SW |
1120 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1121 | ||
b3b94faa DT |
1122 | error = -EDQUOT; |
1123 | break; | |
e9fc2aa0 | 1124 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1125 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1126 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1127 | gfs2_tune_get(sdp, |
1128 | gt_quota_warn_period) * HZ)) { | |
05e0a60d | 1129 | quota_send_warning(qd->qd_id, |
2ec46505 | 1130 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1131 | error = print_message(qd, "warning"); |
1132 | qd->qd_last_warn = jiffies; | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | return error; | |
1137 | } | |
1138 | ||
cd915493 | 1139 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1140 | kuid_t uid, kgid_t gid) |
b3b94faa | 1141 | { |
b3b94faa DT |
1142 | struct gfs2_quota_data *qd; |
1143 | unsigned int x; | |
b3b94faa | 1144 | |
feaa7bba | 1145 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1146 | return; |
383f01fb | 1147 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1148 | return; |
1149 | ||
5407e242 BP |
1150 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1151 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1152 | |
05e0a60d EB |
1153 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1154 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1155 | do_qc(qd, change); |
b3b94faa DT |
1156 | } |
1157 | } | |
1158 | } | |
1159 | ||
ceed1723 | 1160 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1161 | { |
8c42d637 | 1162 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1163 | struct gfs2_quota_data **qda; |
bef292a7 | 1164 | unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder); |
b3b94faa DT |
1165 | unsigned int num_qd; |
1166 | unsigned int x; | |
1167 | int error = 0; | |
1168 | ||
b3b94faa DT |
1169 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1170 | if (!qda) | |
1171 | return -ENOMEM; | |
1172 | ||
e46c772d SW |
1173 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1174 | sdp->sd_quota_sync_gen++; | |
1175 | ||
b3b94faa DT |
1176 | do { |
1177 | num_qd = 0; | |
1178 | ||
1179 | for (;;) { | |
1180 | error = qd_fish(sdp, qda + num_qd); | |
1181 | if (error || !qda[num_qd]) | |
1182 | break; | |
1183 | if (++num_qd == max_qd) | |
1184 | break; | |
1185 | } | |
1186 | ||
1187 | if (num_qd) { | |
1188 | if (!error) | |
1189 | error = do_sync(num_qd, qda); | |
1190 | if (!error) | |
1191 | for (x = 0; x < num_qd; x++) | |
1192 | qda[x]->qd_sync_gen = | |
1193 | sdp->sd_quota_sync_gen; | |
1194 | ||
1195 | for (x = 0; x < num_qd; x++) | |
1196 | qd_unlock(qda[x]); | |
1197 | } | |
1198 | } while (!error && num_qd == max_qd); | |
1199 | ||
e46c772d | 1200 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1201 | kfree(qda); |
1202 | ||
1203 | return error; | |
1204 | } | |
1205 | ||
ed87dabc | 1206 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1207 | { |
1208 | struct gfs2_quota_data *qd; | |
1209 | struct gfs2_holder q_gh; | |
1210 | int error; | |
1211 | ||
05e0a60d | 1212 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1213 | if (error) |
1214 | return error; | |
1215 | ||
1216 | error = do_glock(qd, FORCE, &q_gh); | |
1217 | if (!error) | |
1218 | gfs2_glock_dq_uninit(&q_gh); | |
1219 | ||
1220 | qd_put(qd); | |
b3b94faa DT |
1221 | return error; |
1222 | } | |
1223 | ||
b3b94faa DT |
1224 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1225 | { | |
feaa7bba | 1226 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1227 | u64 size = i_size_read(sdp->sd_qc_inode); |
1228 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1229 | unsigned int x, slot = 0; |
1230 | unsigned int found = 0; | |
c754fbbb | 1231 | unsigned int hash; |
ee2411a8 | 1232 | unsigned int bm_size; |
cd915493 SW |
1233 | u64 dblock; |
1234 | u32 extlen = 0; | |
b3b94faa DT |
1235 | int error; |
1236 | ||
a2e0f799 | 1237 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1238 | return -EIO; |
a2e0f799 | 1239 | |
b3b94faa | 1240 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1241 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1242 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1243 | error = -ENOMEM; |
ee2411a8 SW |
1244 | sdp->sd_quota_bitmap = kmalloc(bm_size, GFP_NOFS|__GFP_NOWARN); |
1245 | if (sdp->sd_quota_bitmap == NULL) | |
1246 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS, PAGE_KERNEL); | |
b3b94faa DT |
1247 | if (!sdp->sd_quota_bitmap) |
1248 | return error; | |
1249 | ||
ee2411a8 | 1250 | memset(sdp->sd_quota_bitmap, 0, bm_size); |
b3b94faa DT |
1251 | |
1252 | for (x = 0; x < blocks; x++) { | |
1253 | struct buffer_head *bh; | |
7aed98fb | 1254 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1255 | unsigned int y; |
1256 | ||
1257 | if (!extlen) { | |
1258 | int new = 0; | |
feaa7bba | 1259 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1260 | if (error) |
1261 | goto fail; | |
1262 | } | |
b3b94faa | 1263 | error = -EIO; |
7276b3b0 SW |
1264 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1265 | if (!bh) | |
1266 | goto fail; | |
b3b94faa DT |
1267 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1268 | brelse(bh); | |
1269 | goto fail; | |
1270 | } | |
1271 | ||
7aed98fb | 1272 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1273 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1274 | y++, slot++) { |
b3b94faa | 1275 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1276 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1277 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1278 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1279 | USRQUOTA : GRPQUOTA; | |
1280 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1281 | be32_to_cpu(qc->qc_id)); | |
1282 | qc++; | |
1283 | if (!qc_change) | |
b3b94faa DT |
1284 | continue; |
1285 | ||
c754fbbb SW |
1286 | hash = gfs2_qd_hash(sdp, qc_id); |
1287 | qd = qd_alloc(hash, sdp, qc_id); | |
1288 | if (qd == NULL) { | |
b3b94faa DT |
1289 | brelse(bh); |
1290 | goto fail; | |
1291 | } | |
1292 | ||
1293 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1294 | qd->qd_change = qc_change; |
b3b94faa DT |
1295 | qd->qd_slot = slot; |
1296 | qd->qd_slot_count = 1; | |
b3b94faa | 1297 | |
7d80823e | 1298 | spin_lock(&qd_lock); |
ee2411a8 | 1299 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1300 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1301 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1302 | spin_unlock(&qd_lock); |
b3b94faa | 1303 | |
c754fbbb SW |
1304 | spin_lock_bucket(hash); |
1305 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1306 | spin_unlock_bucket(hash); | |
1307 | ||
b3b94faa DT |
1308 | found++; |
1309 | } | |
1310 | ||
1311 | brelse(bh); | |
1312 | dblock++; | |
1313 | extlen--; | |
1314 | } | |
1315 | ||
1316 | if (found) | |
1317 | fs_info(sdp, "found %u quota changes\n", found); | |
1318 | ||
1319 | return 0; | |
1320 | ||
a91ea69f | 1321 | fail: |
b3b94faa DT |
1322 | gfs2_quota_cleanup(sdp); |
1323 | return error; | |
1324 | } | |
1325 | ||
b3b94faa DT |
1326 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1327 | { | |
1328 | struct list_head *head = &sdp->sd_quota_list; | |
1329 | struct gfs2_quota_data *qd; | |
b3b94faa | 1330 | |
7d80823e | 1331 | spin_lock(&qd_lock); |
b3b94faa DT |
1332 | while (!list_empty(head)) { |
1333 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1334 | ||
b3b94faa | 1335 | list_del(&qd->qd_list); |
c754fbbb | 1336 | |
0a7ab79c | 1337 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1338 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1339 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1340 | spin_unlock(&qd_lock); |
b3b94faa | 1341 | |
c754fbbb SW |
1342 | spin_lock_bucket(qd->qd_hash); |
1343 | hlist_bl_del_rcu(&qd->qd_hlist); | |
1344 | spin_unlock_bucket(qd->qd_hash); | |
1345 | ||
8ad151c2 SW |
1346 | gfs2_assert_warn(sdp, !qd->qd_change); |
1347 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
b3b94faa DT |
1348 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
1349 | ||
f057f6cd | 1350 | gfs2_glock_put(qd->qd_gl); |
c754fbbb | 1351 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
b3b94faa | 1352 | |
7d80823e | 1353 | spin_lock(&qd_lock); |
b3b94faa | 1354 | } |
7d80823e | 1355 | spin_unlock(&qd_lock); |
b3b94faa DT |
1356 | |
1357 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1358 | ||
1359 | if (sdp->sd_quota_bitmap) { | |
ee2411a8 SW |
1360 | if (is_vmalloc_addr(sdp->sd_quota_bitmap)) |
1361 | vfree(sdp->sd_quota_bitmap); | |
1362 | else | |
1363 | kfree(sdp->sd_quota_bitmap); | |
1364 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1365 | } |
1366 | } | |
1367 | ||
37b2c837 SW |
1368 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1369 | { | |
1370 | if (error == 0 || error == -EROFS) | |
1371 | return; | |
1372 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1373 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1374 | } | |
1375 | ||
1376 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1377 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1378 | unsigned long t, unsigned long *timeo, |
1379 | unsigned int *new_timeo) | |
1380 | { | |
1381 | if (t >= *timeo) { | |
8c42d637 | 1382 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1383 | quotad_error(sdp, msg, error); |
1384 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1385 | } else { | |
1386 | *timeo -= t; | |
1387 | } | |
1388 | } | |
1389 | ||
813e0c46 SW |
1390 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1391 | { | |
1392 | struct gfs2_inode *ip; | |
1393 | ||
1394 | while(1) { | |
1395 | ip = NULL; | |
1396 | spin_lock(&sdp->sd_trunc_lock); | |
1397 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1398 | ip = list_entry(sdp->sd_trunc_list.next, | |
1399 | struct gfs2_inode, i_trunc_list); | |
1400 | list_del_init(&ip->i_trunc_list); | |
1401 | } | |
1402 | spin_unlock(&sdp->sd_trunc_lock); | |
1403 | if (ip == NULL) | |
1404 | return; | |
1405 | gfs2_glock_finish_truncate(ip); | |
1406 | } | |
1407 | } | |
1408 | ||
3d3c10f2 BM |
1409 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1410 | if (!sdp->sd_statfs_force_sync) { | |
1411 | sdp->sd_statfs_force_sync = 1; | |
1412 | wake_up(&sdp->sd_quota_wait); | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | ||
37b2c837 SW |
1417 | /** |
1418 | * gfs2_quotad - Write cached quota changes into the quota file | |
1419 | * @sdp: Pointer to GFS2 superblock | |
1420 | * | |
1421 | */ | |
1422 | ||
1423 | int gfs2_quotad(void *data) | |
1424 | { | |
1425 | struct gfs2_sbd *sdp = data; | |
1426 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1427 | unsigned long statfs_timeo = 0; | |
1428 | unsigned long quotad_timeo = 0; | |
1429 | unsigned long t = 0; | |
1430 | DEFINE_WAIT(wait); | |
813e0c46 | 1431 | int empty; |
37b2c837 SW |
1432 | |
1433 | while (!kthread_should_stop()) { | |
1434 | ||
1435 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1436 | if (sdp->sd_statfs_force_sync) { |
1437 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1438 | quotad_error(sdp, "statfs", error); | |
1439 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1440 | } | |
1441 | else | |
1442 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1443 | &statfs_timeo, | |
1444 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1445 | |
1446 | /* Update quota file */ | |
edd2e9ac | 1447 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1448 | "ad_timeo, &tune->gt_quota_quantum); |
1449 | ||
813e0c46 SW |
1450 | /* Check for & recover partially truncated inodes */ |
1451 | quotad_check_trunc_list(sdp); | |
1452 | ||
a0acae0e TH |
1453 | try_to_freeze(); |
1454 | ||
37b2c837 SW |
1455 | t = min(quotad_timeo, statfs_timeo); |
1456 | ||
7fa5d20d | 1457 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1458 | spin_lock(&sdp->sd_trunc_lock); |
1459 | empty = list_empty(&sdp->sd_trunc_list); | |
1460 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1461 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1462 | t -= schedule_timeout(t); |
1463 | else | |
1464 | t = 0; | |
37b2c837 SW |
1465 | finish_wait(&sdp->sd_quota_wait, &wait); |
1466 | } | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
1d371b5e SW |
1471 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1472 | struct fs_quota_stat *fqs) | |
1473 | { | |
1474 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1475 | ||
1476 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1477 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1478 | |
1479 | switch (sdp->sd_args.ar_quota) { | |
1480 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1481 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1482 | /*FALLTHRU*/ |
1483 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1484 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1485 | break; |
1486 | case GFS2_QUOTA_OFF: | |
1487 | break; | |
1488 | } | |
1489 | ||
1d371b5e SW |
1490 | if (sdp->sd_quota_inode) { |
1491 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1492 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1493 | } | |
1494 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1495 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
2147dbfd | 1496 | fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru); |
1d371b5e SW |
1497 | return 0; |
1498 | } | |
1499 | ||
74a8a103 | 1500 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1501 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1502 | { |
1503 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1504 | struct gfs2_quota_lvb *qlvb; | |
1505 | struct gfs2_quota_data *qd; | |
1506 | struct gfs2_holder q_gh; | |
1507 | int error; | |
1508 | ||
1509 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1510 | ||
1511 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1512 | return -ESRCH; /* Crazy XFS error code */ | |
1513 | ||
236c64e4 EB |
1514 | if ((qid.type != USRQUOTA) && |
1515 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1516 | return -EINVAL; |
1517 | ||
05e0a60d | 1518 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1519 | if (error) |
1520 | return error; | |
1521 | error = do_glock(qd, FORCE, &q_gh); | |
1522 | if (error) | |
1523 | goto out; | |
1524 | ||
4e2f8849 | 1525 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1526 | fdq->d_version = FS_DQUOT_VERSION; |
236c64e4 | 1527 | fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1528 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1529 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1530 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1531 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1532 | |
1533 | gfs2_glock_dq_uninit(&q_gh); | |
1534 | out: | |
1535 | qd_put(qd); | |
1536 | return error; | |
1537 | } | |
1538 | ||
e285c100 | 1539 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1540 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1541 | |
74a8a103 | 1542 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1543 | struct fs_disk_quota *fdq) |
e285c100 SW |
1544 | { |
1545 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1546 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1547 | struct gfs2_quota_data *qd; | |
1548 | struct gfs2_holder q_gh, i_gh; | |
1549 | unsigned int data_blocks, ind_blocks; | |
1550 | unsigned int blocks = 0; | |
1551 | int alloc_required; | |
e285c100 SW |
1552 | loff_t offset; |
1553 | int error; | |
1554 | ||
1555 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1556 | return -ESRCH; /* Crazy XFS error code */ | |
1557 | ||
236c64e4 EB |
1558 | if ((qid.type != USRQUOTA) && |
1559 | (qid.type != GRPQUOTA)) | |
e285c100 | 1560 | return -EINVAL; |
e285c100 SW |
1561 | |
1562 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1563 | return -EINVAL; | |
e285c100 | 1564 | |
05e0a60d | 1565 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1566 | if (error) |
1567 | return error; | |
1568 | ||
0a305e49 BP |
1569 | error = gfs2_rs_alloc(ip); |
1570 | if (error) | |
1571 | goto out_put; | |
1572 | ||
e285c100 SW |
1573 | mutex_lock(&ip->i_inode.i_mutex); |
1574 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1575 | if (error) | |
0a305e49 | 1576 | goto out_unlockput; |
e285c100 SW |
1577 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1578 | if (error) | |
1579 | goto out_q; | |
1580 | ||
1581 | /* Check for existing entry, if none then alloc new blocks */ | |
1582 | error = update_qd(sdp, qd); | |
1583 | if (error) | |
1584 | goto out_i; | |
1585 | ||
1586 | /* If nothing has changed, this is a no-op */ | |
1587 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1588 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1589 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1590 | |
e285c100 | 1591 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1592 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1593 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1594 | |
1595 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1596 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1597 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1598 | ||
e285c100 SW |
1599 | if (fdq->d_fieldmask == 0) |
1600 | goto out_i; | |
1601 | ||
1602 | offset = qd2offset(qd); | |
461cb419 | 1603 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1604 | if (gfs2_is_stuffed(ip)) |
1605 | alloc_required = 1; | |
e285c100 | 1606 | if (alloc_required) { |
7b9cff46 | 1607 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1608 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1609 | &data_blocks, &ind_blocks); | |
564e12b1 | 1610 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1611 | ap.target = blocks; |
1612 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1613 | if (error) |
564e12b1 | 1614 | goto out_i; |
71f890f7 | 1615 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1616 | } |
1617 | ||
e79a46a0 AD |
1618 | /* Some quotas span block boundaries and can update two blocks, |
1619 | adding an extra block to the transaction to handle such quotas */ | |
1620 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1621 | if (error) |
1622 | goto out_release; | |
1623 | ||
1624 | /* Apply changes */ | |
1625 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1626 | ||
1627 | gfs2_trans_end(sdp); | |
1628 | out_release: | |
564e12b1 | 1629 | if (alloc_required) |
e285c100 | 1630 | gfs2_inplace_release(ip); |
e285c100 SW |
1631 | out_i: |
1632 | gfs2_glock_dq_uninit(&i_gh); | |
1633 | out_q: | |
1634 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1635 | out_unlockput: |
e285c100 | 1636 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1637 | out_put: |
e285c100 SW |
1638 | qd_put(qd); |
1639 | return error; | |
1640 | } | |
1641 | ||
cc632e7f SW |
1642 | const struct quotactl_ops gfs2_quotactl_ops = { |
1643 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1644 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1645 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1646 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1647 | }; |
c754fbbb SW |
1648 | |
1649 | void __init gfs2_quota_hash_init(void) | |
1650 | { | |
1651 | unsigned i; | |
1652 | ||
1653 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1654 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1655 | } |