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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 4 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
7 | /* | |
8 | * Quota change tags are associated with each transaction that allocates or | |
9 | * deallocates space. Those changes are accumulated locally to each node (in a | |
10 | * per-node file) and then are periodically synced to the quota file. This | |
11 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
12 | * fuzziness in the current usage value of IDs that are being used on different | |
13 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
14 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 15 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
16 | * program to be run on node crashes or anything like that. |
17 | * | |
18 | * There are couple of knobs that let the administrator manage the quota | |
19 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
20 | * sitting on one node before being synced to the quota file. (The default is | |
21 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
22 | * of quota file syncs increases as the user moves closer to their limit. The | |
23 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
24 | * means that there is more contention between the nodes for the quota file. | |
25 | * The default value is one. This sets the maximum theoretical quota overrun | |
26 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
27 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
28 | * number greater than one makes quota syncs more frequent and reduces the | |
29 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
30 | * syncs less frequent. | |
31 | * | |
32 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
33 | * the quota file, so it is not being constantly read. | |
34 | */ | |
35 | ||
d77d1b58 JP |
36 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
37 | ||
b3b94faa DT |
38 | #include <linux/sched.h> |
39 | #include <linux/slab.h> | |
1495f230 | 40 | #include <linux/mm.h> |
b3b94faa DT |
41 | #include <linux/spinlock.h> |
42 | #include <linux/completion.h> | |
43 | #include <linux/buffer_head.h> | |
b3b94faa | 44 | #include <linux/sort.h> |
18ec7d5c | 45 | #include <linux/fs.h> |
2e565bb6 | 46 | #include <linux/bio.h> |
5c676f6d | 47 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
48 | #include <linux/kthread.h> |
49 | #include <linux/freezer.h> | |
2ec46505 | 50 | #include <linux/quota.h> |
1d371b5e | 51 | #include <linux/dqblk_xfs.h> |
9b9f039d | 52 | #include <linux/lockref.h> |
2147dbfd | 53 | #include <linux/list_lru.h> |
c754fbbb SW |
54 | #include <linux/rcupdate.h> |
55 | #include <linux/rculist_bl.h> | |
56 | #include <linux/bit_spinlock.h> | |
57 | #include <linux/jhash.h> | |
1e3d3620 | 58 | #include <linux/vmalloc.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 | 74 | #define GFS2_QD_HASH_SHIFT 12 |
47a9a527 | 75 | #define GFS2_QD_HASH_SIZE BIT(GFS2_QD_HASH_SHIFT) |
c754fbbb SW |
76 | #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1) |
77 | ||
432928c9 BP |
78 | #define QC_CHANGE 0 |
79 | #define QC_SYNC 1 | |
80 | ||
c754fbbb | 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); | |
a475c5dd AG |
112 | struct gfs2_sbd *sdp = qd->qd_sbd; |
113 | ||
c754fbbb | 114 | kmem_cache_free(gfs2_quotad_cachep, qd); |
a475c5dd AG |
115 | if (atomic_dec_and_test(&sdp->sd_quota_count)) |
116 | wake_up(&sdp->sd_kill_wait); | |
c754fbbb SW |
117 | } |
118 | ||
faada74a | 119 | static void gfs2_qd_dispose(struct gfs2_quota_data *qd) |
0a7ab79c | 120 | { |
faada74a | 121 | struct gfs2_sbd *sdp = qd->qd_sbd; |
2147dbfd | 122 | |
faada74a AG |
123 | spin_lock(&qd_lock); |
124 | list_del(&qd->qd_list); | |
125 | spin_unlock(&qd_lock); | |
0a7ab79c | 126 | |
faada74a AG |
127 | spin_lock_bucket(qd->qd_hash); |
128 | hlist_bl_del_rcu(&qd->qd_hlist); | |
129 | spin_unlock_bucket(qd->qd_hash); | |
c754fbbb | 130 | |
fae2e73a | 131 | if (!gfs2_withdrawn(sdp)) { |
0a7ab79c | 132 | gfs2_assert_warn(sdp, !qd->qd_change); |
0e072cac | 133 | gfs2_assert_warn(sdp, !qd->qd_slot_ref); |
0a7ab79c | 134 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
fae2e73a | 135 | } |
0a7ab79c | 136 | |
faada74a AG |
137 | gfs2_glock_put(qd->qd_gl); |
138 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); | |
139 | } | |
0a7ab79c | 140 | |
faada74a AG |
141 | static void gfs2_qd_list_dispose(struct list_head *list) |
142 | { | |
143 | struct gfs2_quota_data *qd; | |
0a7ab79c | 144 | |
faada74a AG |
145 | while (!list_empty(list)) { |
146 | qd = list_first_entry(list, struct gfs2_quota_data, qd_lru); | |
147 | list_del(&qd->qd_lru); | |
0a7ab79c | 148 | |
faada74a | 149 | gfs2_qd_dispose(qd); |
0a7ab79c | 150 | } |
2147dbfd SW |
151 | } |
152 | ||
153 | ||
3f97b163 VD |
154 | static enum lru_status gfs2_qd_isolate(struct list_head *item, |
155 | struct list_lru_one *lru, spinlock_t *lru_lock, void *arg) | |
2147dbfd SW |
156 | { |
157 | struct list_head *dispose = arg; | |
6b0e9a5f AG |
158 | struct gfs2_quota_data *qd = |
159 | list_entry(item, struct gfs2_quota_data, qd_lru); | |
160 | enum lru_status status; | |
2147dbfd SW |
161 | |
162 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
163 | return LRU_SKIP; | |
164 | ||
6b0e9a5f | 165 | status = LRU_SKIP; |
2147dbfd SW |
166 | if (qd->qd_lockref.count == 0) { |
167 | lockref_mark_dead(&qd->qd_lockref); | |
3f97b163 | 168 | list_lru_isolate_move(lru, &qd->qd_lru, dispose); |
6b0e9a5f | 169 | status = LRU_REMOVED; |
2147dbfd SW |
170 | } |
171 | ||
172 | spin_unlock(&qd->qd_lockref.lock); | |
6b0e9a5f | 173 | return status; |
2147dbfd SW |
174 | } |
175 | ||
176 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
177 | struct shrink_control *sc) | |
178 | { | |
179 | LIST_HEAD(dispose); | |
180 | unsigned long freed; | |
181 | ||
182 | if (!(sc->gfp_mask & __GFP_FS)) | |
183 | return SHRINK_STOP; | |
184 | ||
503c358c VD |
185 | freed = list_lru_shrink_walk(&gfs2_qd_lru, sc, |
186 | gfs2_qd_isolate, &dispose); | |
2147dbfd | 187 | |
faada74a | 188 | gfs2_qd_list_dispose(&dispose); |
2147dbfd | 189 | |
1ab6c499 DC |
190 | return freed; |
191 | } | |
0a7ab79c | 192 | |
2147dbfd SW |
193 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
194 | struct shrink_control *sc) | |
1ab6c499 | 195 | { |
503c358c | 196 | return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); |
0a7ab79c AD |
197 | } |
198 | ||
8ee0fd9c | 199 | static struct shrinker *gfs2_qd_shrinker; |
2147dbfd | 200 | |
8ee0fd9c QZ |
201 | int __init gfs2_qd_shrinker_init(void) |
202 | { | |
203 | gfs2_qd_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "gfs2-qd"); | |
204 | if (!gfs2_qd_shrinker) | |
205 | return -ENOMEM; | |
206 | ||
207 | gfs2_qd_shrinker->count_objects = gfs2_qd_shrink_count; | |
208 | gfs2_qd_shrinker->scan_objects = gfs2_qd_shrink_scan; | |
209 | ||
210 | shrinker_register(gfs2_qd_shrinker); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | void gfs2_qd_shrinker_exit(void) | |
216 | { | |
217 | shrinker_free(gfs2_qd_shrinker); | |
218 | } | |
2147dbfd | 219 | |
2f6c9896 EB |
220 | static u64 qd2index(struct gfs2_quota_data *qd) |
221 | { | |
05e0a60d EB |
222 | struct kqid qid = qd->qd_id; |
223 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 224 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
225 | } |
226 | ||
cd915493 | 227 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 228 | { |
8f190c97 | 229 | return qd2index(qd) * sizeof(struct gfs2_quota); |
b3b94faa DT |
230 | } |
231 | ||
c754fbbb | 232 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
233 | { |
234 | struct gfs2_quota_data *qd; | |
235 | int error; | |
236 | ||
37b2c837 | 237 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 238 | if (!qd) |
c754fbbb | 239 | return NULL; |
b3b94faa | 240 | |
c754fbbb | 241 | qd->qd_sbd = sdp; |
bb73ae8f | 242 | qd->qd_lockref.count = 0; |
9b9f039d | 243 | spin_lock_init(&qd->qd_lockref.lock); |
05e0a60d | 244 | qd->qd_id = qid; |
b3b94faa | 245 | qd->qd_slot = -1; |
2147dbfd | 246 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 247 | qd->qd_hash = hash; |
b3b94faa | 248 | |
2f6c9896 | 249 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
250 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
251 | if (error) | |
252 | goto fail; | |
253 | ||
c754fbbb | 254 | return qd; |
b3b94faa | 255 | |
a91ea69f | 256 | fail: |
37b2c837 | 257 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 258 | return NULL; |
b3b94faa DT |
259 | } |
260 | ||
c754fbbb SW |
261 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
262 | const struct gfs2_sbd *sdp, | |
263 | struct kqid qid) | |
b3b94faa | 264 | { |
c754fbbb SW |
265 | struct gfs2_quota_data *qd; |
266 | struct hlist_bl_node *h; | |
b3b94faa | 267 | |
c754fbbb SW |
268 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
269 | if (!qid_eq(qd->qd_id, qid)) | |
270 | continue; | |
271 | if (qd->qd_sbd != sdp) | |
272 | continue; | |
273 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
274 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
275 | return qd; | |
b3b94faa | 276 | } |
c754fbbb | 277 | } |
b3b94faa | 278 | |
c754fbbb SW |
279 | return NULL; |
280 | } | |
b3b94faa | 281 | |
b3b94faa | 282 | |
c754fbbb SW |
283 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
284 | struct gfs2_quota_data **qdp) | |
285 | { | |
286 | struct gfs2_quota_data *qd, *new_qd; | |
287 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 288 | |
c754fbbb SW |
289 | rcu_read_lock(); |
290 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
291 | rcu_read_unlock(); | |
b3b94faa | 292 | |
c754fbbb SW |
293 | if (qd) |
294 | return 0; | |
295 | ||
296 | new_qd = qd_alloc(hash, sdp, qid); | |
297 | if (!new_qd) | |
298 | return -ENOMEM; | |
299 | ||
300 | spin_lock(&qd_lock); | |
301 | spin_lock_bucket(hash); | |
302 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
303 | if (qd == NULL) { | |
bb73ae8f | 304 | new_qd->qd_lockref.count++; |
c754fbbb SW |
305 | *qdp = new_qd; |
306 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
307 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
308 | atomic_inc(&sdp->sd_quota_count); | |
309 | } | |
310 | spin_unlock_bucket(hash); | |
311 | spin_unlock(&qd_lock); | |
312 | ||
313 | if (qd) { | |
314 | gfs2_glock_put(new_qd->qd_gl); | |
315 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 316 | } |
c754fbbb SW |
317 | |
318 | return 0; | |
b3b94faa DT |
319 | } |
320 | ||
c754fbbb | 321 | |
b3b94faa DT |
322 | static void qd_hold(struct gfs2_quota_data *qd) |
323 | { | |
481f6e7d | 324 | struct gfs2_sbd *sdp = qd->qd_sbd; |
9b9f039d SW |
325 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
326 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
327 | } |
328 | ||
329 | static void qd_put(struct gfs2_quota_data *qd) | |
330 | { | |
a475c5dd AG |
331 | struct gfs2_sbd *sdp; |
332 | ||
2147dbfd SW |
333 | if (lockref_put_or_lock(&qd->qd_lockref)) |
334 | return; | |
9b9f039d | 335 | |
a475c5dd AG |
336 | BUG_ON(__lockref_is_dead(&qd->qd_lockref)); |
337 | sdp = qd->qd_sbd; | |
338 | if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) { | |
339 | lockref_mark_dead(&qd->qd_lockref); | |
340 | spin_unlock(&qd->qd_lockref.lock); | |
341 | ||
342 | gfs2_qd_dispose(qd); | |
343 | return; | |
344 | } | |
345 | ||
2147dbfd SW |
346 | qd->qd_lockref.count = 0; |
347 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
348 | spin_unlock(&qd->qd_lockref.lock); | |
b3b94faa DT |
349 | } |
350 | ||
351 | static int slot_get(struct gfs2_quota_data *qd) | |
352 | { | |
ee2411a8 SW |
353 | struct gfs2_sbd *sdp = qd->qd_sbd; |
354 | unsigned int bit; | |
355 | int error = 0; | |
b3b94faa | 356 | |
2d9e7230 | 357 | spin_lock(&sdp->sd_bitmap_lock); |
0e072cac | 358 | if (qd->qd_slot_ref == 0) { |
9ab7b78a BP |
359 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, |
360 | sdp->sd_quota_slots); | |
361 | if (bit >= sdp->sd_quota_slots) { | |
362 | error = -ENOSPC; | |
363 | goto out; | |
364 | } | |
ee2411a8 SW |
365 | set_bit(bit, sdp->sd_quota_bitmap); |
366 | qd->qd_slot = bit; | |
b3b94faa | 367 | } |
0e072cac | 368 | qd->qd_slot_ref++; |
9ab7b78a | 369 | out: |
2d9e7230 | 370 | spin_unlock(&sdp->sd_bitmap_lock); |
ee2411a8 | 371 | return error; |
b3b94faa DT |
372 | } |
373 | ||
374 | static void slot_hold(struct gfs2_quota_data *qd) | |
375 | { | |
ee2411a8 | 376 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 377 | |
2d9e7230 | 378 | spin_lock(&sdp->sd_bitmap_lock); |
0e072cac BP |
379 | gfs2_assert(sdp, qd->qd_slot_ref); |
380 | qd->qd_slot_ref++; | |
2d9e7230 | 381 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
382 | } |
383 | ||
384 | static void slot_put(struct gfs2_quota_data *qd) | |
385 | { | |
ee2411a8 | 386 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 387 | |
2d9e7230 | 388 | spin_lock(&sdp->sd_bitmap_lock); |
0e072cac BP |
389 | gfs2_assert(sdp, qd->qd_slot_ref); |
390 | if (!--qd->qd_slot_ref) { | |
ee2411a8 | 391 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
392 | qd->qd_slot = -1; |
393 | } | |
2d9e7230 | 394 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
395 | } |
396 | ||
397 | static int bh_get(struct gfs2_quota_data *qd) | |
398 | { | |
481f6e7d | 399 | struct gfs2_sbd *sdp = qd->qd_sbd; |
c360abbb BP |
400 | struct inode *inode = sdp->sd_qc_inode; |
401 | struct gfs2_inode *ip = GFS2_I(inode); | |
b3b94faa | 402 | unsigned int block, offset; |
b3b94faa | 403 | struct buffer_head *bh; |
c360abbb | 404 | struct iomap iomap = { }; |
b3b94faa DT |
405 | int error; |
406 | ||
f55ab26a | 407 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
408 | |
409 | if (qd->qd_bh_count++) { | |
f55ab26a | 410 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
411 | return 0; |
412 | } | |
413 | ||
414 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 415 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 416 | |
c360abbb BP |
417 | error = gfs2_iomap_get(inode, |
418 | (loff_t)block << inode->i_blkbits, | |
419 | i_blocksize(inode), &iomap); | |
b3b94faa DT |
420 | if (error) |
421 | goto fail; | |
c360abbb BP |
422 | error = -ENOENT; |
423 | if (iomap.type != IOMAP_MAPPED) | |
424 | goto fail; | |
425 | ||
426 | error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits, | |
427 | DIO_WAIT, 0, &bh); | |
b3b94faa DT |
428 | if (error) |
429 | goto fail; | |
430 | error = -EIO; | |
431 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
432 | goto fail_brelse; | |
433 | ||
434 | qd->qd_bh = bh; | |
435 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
436 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
437 | offset * sizeof(struct gfs2_quota_change)); | |
438 | ||
2e95b665 | 439 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
440 | |
441 | return 0; | |
442 | ||
a91ea69f | 443 | fail_brelse: |
b3b94faa | 444 | brelse(bh); |
a91ea69f | 445 | fail: |
b3b94faa | 446 | qd->qd_bh_count--; |
f55ab26a | 447 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
448 | return error; |
449 | } | |
450 | ||
451 | static void bh_put(struct gfs2_quota_data *qd) | |
452 | { | |
481f6e7d | 453 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 454 | |
f55ab26a | 455 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
456 | gfs2_assert(sdp, qd->qd_bh_count); |
457 | if (!--qd->qd_bh_count) { | |
458 | brelse(qd->qd_bh); | |
459 | qd->qd_bh = NULL; | |
460 | qd->qd_bh_qc = NULL; | |
461 | } | |
f55ab26a | 462 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
463 | } |
464 | ||
1bf59bf6 SW |
465 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
466 | u64 *sync_gen) | |
467 | { | |
468 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
469 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
470 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
471 | return 0; | |
472 | ||
2147dbfd SW |
473 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
474 | return 0; | |
1bf59bf6 | 475 | |
2147dbfd | 476 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 477 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 478 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 479 | slot_hold(qd); |
1bf59bf6 SW |
480 | return 1; |
481 | } | |
482 | ||
7dbc6ae6 BP |
483 | static int qd_bh_get_or_undo(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
484 | { | |
485 | int error; | |
486 | ||
487 | error = bh_get(qd); | |
488 | if (!error) | |
489 | return 0; | |
490 | ||
491 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
492 | slot_put(qd); | |
493 | qd_put(qd); | |
494 | return error; | |
495 | } | |
496 | ||
b3b94faa DT |
497 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
498 | { | |
b846f2d7 | 499 | struct gfs2_quota_data *qd = NULL, *iter; |
b3b94faa | 500 | int error; |
b3b94faa DT |
501 | |
502 | *qdp = NULL; | |
503 | ||
bc98a42c | 504 | if (sb_rdonly(sdp->sd_vfs)) |
b3b94faa DT |
505 | return 0; |
506 | ||
7d80823e | 507 | spin_lock(&qd_lock); |
b3b94faa | 508 | |
b846f2d7 JK |
509 | list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) { |
510 | if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) { | |
511 | qd = iter; | |
1bf59bf6 | 512 | break; |
b846f2d7 | 513 | } |
b3b94faa DT |
514 | } |
515 | ||
7d80823e | 516 | spin_unlock(&qd_lock); |
b3b94faa DT |
517 | |
518 | if (qd) { | |
7dbc6ae6 BP |
519 | error = qd_bh_get_or_undo(sdp, qd); |
520 | if (error) | |
b3b94faa | 521 | return error; |
7dbc6ae6 | 522 | *qdp = qd; |
b3b94faa DT |
523 | } |
524 | ||
b3b94faa DT |
525 | return 0; |
526 | } | |
527 | ||
a4d22e33 | 528 | static void qdsb_put(struct gfs2_quota_data *qd) |
b3b94faa | 529 | { |
b3b94faa DT |
530 | bh_put(qd); |
531 | slot_put(qd); | |
532 | qd_put(qd); | |
533 | } | |
534 | ||
a4d22e33 BP |
535 | static void qd_unlock(struct gfs2_quota_data *qd) |
536 | { | |
537 | gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags)); | |
538 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
539 | qdsb_put(qd); | |
540 | } | |
541 | ||
b59c8b6f | 542 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
543 | struct gfs2_quota_data **qdp) |
544 | { | |
545 | int error; | |
546 | ||
05e0a60d | 547 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
548 | if (error) |
549 | return error; | |
550 | ||
551 | error = slot_get(*qdp); | |
552 | if (error) | |
553 | goto fail; | |
554 | ||
555 | error = bh_get(*qdp); | |
556 | if (error) | |
557 | goto fail_slot; | |
558 | ||
559 | return 0; | |
560 | ||
a91ea69f | 561 | fail_slot: |
b3b94faa | 562 | slot_put(*qdp); |
a91ea69f | 563 | fail: |
b3b94faa DT |
564 | qd_put(*qdp); |
565 | return error; | |
566 | } | |
567 | ||
b54e9a0b | 568 | /** |
2fba46a0 BP |
569 | * gfs2_qa_get - make sure we have a quota allocations data structure, |
570 | * if necessary | |
b54e9a0b BP |
571 | * @ip: the inode for this reservation |
572 | */ | |
2fba46a0 | 573 | int gfs2_qa_get(struct gfs2_inode *ip) |
b54e9a0b | 574 | { |
b54e9a0b | 575 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5fcff61e | 576 | struct inode *inode = &ip->i_inode; |
b54e9a0b BP |
577 | |
578 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
579 | return 0; | |
580 | ||
5fcff61e | 581 | spin_lock(&inode->i_lock); |
b54e9a0b | 582 | if (ip->i_qadata == NULL) { |
5fcff61e BP |
583 | struct gfs2_qadata *tmp; |
584 | ||
585 | spin_unlock(&inode->i_lock); | |
586 | tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS); | |
587 | if (!tmp) | |
588 | return -ENOMEM; | |
589 | ||
590 | spin_lock(&inode->i_lock); | |
591 | if (ip->i_qadata == NULL) | |
592 | ip->i_qadata = tmp; | |
593 | else | |
594 | kmem_cache_free(gfs2_qadata_cachep, tmp); | |
b54e9a0b | 595 | } |
2fba46a0 | 596 | ip->i_qadata->qa_ref++; |
5fcff61e BP |
597 | spin_unlock(&inode->i_lock); |
598 | return 0; | |
b54e9a0b BP |
599 | } |
600 | ||
2fba46a0 | 601 | void gfs2_qa_put(struct gfs2_inode *ip) |
b54e9a0b | 602 | { |
5fcff61e BP |
603 | struct inode *inode = &ip->i_inode; |
604 | ||
605 | spin_lock(&inode->i_lock); | |
2fba46a0 | 606 | if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) { |
b54e9a0b BP |
607 | kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata); |
608 | ip->i_qadata = NULL; | |
609 | } | |
5fcff61e | 610 | spin_unlock(&inode->i_lock); |
b54e9a0b BP |
611 | } |
612 | ||
7c06b5d6 | 613 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 614 | { |
feaa7bba | 615 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 616 | struct gfs2_quota_data **qd; |
b3b94faa DT |
617 | int error; |
618 | ||
b54e9a0b BP |
619 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
620 | return 0; | |
621 | ||
2fba46a0 BP |
622 | error = gfs2_qa_get(ip); |
623 | if (error) | |
624 | return error; | |
5407e242 | 625 | |
b54e9a0b | 626 | qd = ip->i_qadata->qa_qd; |
5407e242 | 627 | |
b54e9a0b | 628 | if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) || |
2fba46a0 BP |
629 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) { |
630 | error = -EIO; | |
dac0fc31 | 631 | gfs2_qa_put(ip); |
2fba46a0 BP |
632 | goto out; |
633 | } | |
b3b94faa | 634 | |
b59c8b6f | 635 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa | 636 | if (error) |
2fba46a0 | 637 | goto out_unhold; |
b54e9a0b | 638 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
639 | qd++; |
640 | ||
b59c8b6f | 641 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa | 642 | if (error) |
2fba46a0 | 643 | goto out_unhold; |
b54e9a0b | 644 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
645 | qd++; |
646 | ||
6b24c0d2 EB |
647 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
648 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 649 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa | 650 | if (error) |
2fba46a0 | 651 | goto out_unhold; |
b54e9a0b | 652 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
653 | qd++; |
654 | } | |
655 | ||
6b24c0d2 EB |
656 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
657 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 658 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa | 659 | if (error) |
2fba46a0 | 660 | goto out_unhold; |
b54e9a0b | 661 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
662 | qd++; |
663 | } | |
664 | ||
2fba46a0 | 665 | out_unhold: |
b3b94faa DT |
666 | if (error) |
667 | gfs2_quota_unhold(ip); | |
2fba46a0 | 668 | out: |
b3b94faa DT |
669 | return error; |
670 | } | |
671 | ||
672 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
673 | { | |
feaa7bba | 674 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b58bf407 | 675 | u32 x; |
b3b94faa | 676 | |
b54e9a0b | 677 | if (ip->i_qadata == NULL) |
5407e242 | 678 | return; |
2fba46a0 | 679 | |
b3b94faa DT |
680 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
681 | ||
b54e9a0b BP |
682 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
683 | qdsb_put(ip->i_qadata->qa_qd[x]); | |
684 | ip->i_qadata->qa_qd[x] = NULL; | |
b3b94faa | 685 | } |
b54e9a0b | 686 | ip->i_qadata->qa_qd_num = 0; |
2fba46a0 | 687 | gfs2_qa_put(ip); |
b3b94faa DT |
688 | } |
689 | ||
690 | static int sort_qd(const void *a, const void *b) | |
691 | { | |
48fac179 SW |
692 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
693 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 694 | |
05e0a60d | 695 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 696 | return -1; |
05e0a60d | 697 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 698 | return 1; |
48fac179 | 699 | return 0; |
b3b94faa DT |
700 | } |
701 | ||
432928c9 | 702 | static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type) |
b3b94faa | 703 | { |
481f6e7d | 704 | struct gfs2_sbd *sdp = qd->qd_sbd; |
feaa7bba | 705 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 706 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 707 | s64 x; |
b3b94faa | 708 | |
f55ab26a | 709 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 710 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
711 | |
712 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
713 | qc->qc_change = 0; | |
714 | qc->qc_flags = 0; | |
05e0a60d | 715 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 716 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 717 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
718 | } |
719 | ||
b44b84d7 | 720 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
721 | qc->qc_change = cpu_to_be64(x); |
722 | ||
7d80823e | 723 | spin_lock(&qd_lock); |
b3b94faa | 724 | qd->qd_change = x; |
7d80823e | 725 | spin_unlock(&qd_lock); |
b3b94faa | 726 | |
432928c9 BP |
727 | if (qc_type == QC_CHANGE) { |
728 | if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
729 | qd_hold(qd); | |
730 | slot_hold(qd); | |
731 | } | |
732 | } else { | |
b3b94faa DT |
733 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); |
734 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
735 | qc->qc_flags = 0; | |
736 | qc->qc_id = 0; | |
737 | slot_put(qd); | |
738 | qd_put(qd); | |
b3b94faa | 739 | } |
907b9bce | 740 | |
9cde2898 AD |
741 | if (change < 0) /* Reset quiet flag if we freed some blocks */ |
742 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
f55ab26a | 743 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
744 | } |
745 | ||
d96dad27 | 746 | static int gfs2_write_buf_to_page(struct gfs2_sbd *sdp, unsigned long index, |
39a72580 AD |
747 | unsigned off, void *buf, unsigned bytes) |
748 | { | |
d96dad27 | 749 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
39a72580 | 750 | struct inode *inode = &ip->i_inode; |
39a72580 | 751 | struct address_space *mapping = inode->i_mapping; |
4064a0aa | 752 | struct folio *folio; |
39a72580 | 753 | struct buffer_head *bh; |
39a72580 AD |
754 | u64 blk; |
755 | unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0; | |
756 | unsigned to_write = bytes, pg_off = off; | |
39a72580 | 757 | |
09cbfeaf | 758 | blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift); |
39a72580 AD |
759 | boff = off % bsize; |
760 | ||
4064a0aa MWO |
761 | folio = filemap_grab_folio(mapping, index); |
762 | if (IS_ERR(folio)) | |
763 | return PTR_ERR(folio); | |
764 | bh = folio_buffers(folio); | |
765 | if (!bh) | |
0a88810d | 766 | bh = create_empty_buffers(folio, bsize, 0); |
39a72580 | 767 | |
4064a0aa MWO |
768 | for (;;) { |
769 | /* Find the beginning block within the folio */ | |
39a72580 AD |
770 | if (pg_off >= ((bnum * bsize) + bsize)) { |
771 | bh = bh->b_this_page; | |
772 | bnum++; | |
773 | blk++; | |
774 | continue; | |
775 | } | |
776 | if (!buffer_mapped(bh)) { | |
777 | gfs2_block_map(inode, blk, bh, 1); | |
778 | if (!buffer_mapped(bh)) | |
779 | goto unlock_out; | |
780 | /* If it's a newly allocated disk block, zero it */ | |
781 | if (buffer_new(bh)) | |
4064a0aa MWO |
782 | folio_zero_range(folio, bnum * bsize, |
783 | bh->b_size); | |
39a72580 | 784 | } |
4064a0aa | 785 | if (folio_test_uptodate(folio)) |
39a72580 | 786 | set_buffer_uptodate(bh); |
86a020cc ZY |
787 | if (bh_read(bh, REQ_META | REQ_PRIO) < 0) |
788 | goto unlock_out; | |
768963ab | 789 | gfs2_trans_add_data(ip->i_gl, bh); |
39a72580 AD |
790 | |
791 | /* If we need to write to the next block as well */ | |
792 | if (to_write > (bsize - boff)) { | |
793 | pg_off += (bsize - boff); | |
794 | to_write -= (bsize - boff); | |
795 | boff = pg_off % bsize; | |
796 | continue; | |
797 | } | |
f0418e4b | 798 | break; |
39a72580 AD |
799 | } |
800 | ||
4064a0aa MWO |
801 | /* Write to the folio, now that we have setup the buffer(s) */ |
802 | memcpy_to_folio(folio, off, buf, bytes); | |
803 | flush_dcache_folio(folio); | |
804 | folio_unlock(folio); | |
805 | folio_put(folio); | |
39a72580 AD |
806 | |
807 | return 0; | |
808 | ||
809 | unlock_out: | |
4064a0aa MWO |
810 | folio_unlock(folio); |
811 | folio_put(folio); | |
39a72580 AD |
812 | return -EIO; |
813 | } | |
814 | ||
adfd2b5e | 815 | static int gfs2_write_disk_quota(struct gfs2_sbd *sdp, struct gfs2_quota *qp, |
39a72580 AD |
816 | loff_t loc) |
817 | { | |
818 | unsigned long pg_beg; | |
819 | unsigned pg_off, nbytes, overflow = 0; | |
e34c16c9 | 820 | int error; |
39a72580 AD |
821 | void *ptr; |
822 | ||
823 | nbytes = sizeof(struct gfs2_quota); | |
824 | ||
09cbfeaf | 825 | pg_beg = loc >> PAGE_SHIFT; |
45eb0504 | 826 | pg_off = offset_in_page(loc); |
39a72580 AD |
827 | |
828 | /* If the quota straddles a page boundary, split the write in two */ | |
e34c16c9 | 829 | if ((pg_off + nbytes) > PAGE_SIZE) |
09cbfeaf | 830 | overflow = (pg_off + nbytes) - PAGE_SIZE; |
39a72580 AD |
831 | |
832 | ptr = qp; | |
d96dad27 | 833 | error = gfs2_write_buf_to_page(sdp, pg_beg, pg_off, ptr, |
39a72580 AD |
834 | nbytes - overflow); |
835 | /* If there's an overflow, write the remaining bytes to the next page */ | |
e34c16c9 | 836 | if (!error && overflow) |
d96dad27 | 837 | error = gfs2_write_buf_to_page(sdp, pg_beg + 1, 0, |
39a72580 AD |
838 | ptr + nbytes - overflow, |
839 | overflow); | |
840 | return error; | |
841 | } | |
842 | ||
18ec7d5c | 843 | /** |
1e72c0f7 | 844 | * gfs2_adjust_quota - adjust record of current block usage |
ee1768e4 | 845 | * @sdp: The superblock |
1e72c0f7 | 846 | * @loc: Offset of the entry in the quota file |
e285c100 | 847 | * @change: The amount of usage change to record |
1e72c0f7 | 848 | * @qd: The quota data |
e285c100 | 849 | * @fdq: The updated limits to record |
18ec7d5c SW |
850 | * |
851 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
852 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
853 | * |
854 | * Returns: 0 or -ve on error | |
18ec7d5c | 855 | */ |
1e72c0f7 | 856 | |
ee1768e4 | 857 | static int gfs2_adjust_quota(struct gfs2_sbd *sdp, loff_t loc, |
e285c100 | 858 | s64 change, struct gfs2_quota_data *qd, |
14bf61ff | 859 | struct qc_dqblk *fdq) |
18ec7d5c | 860 | { |
ee1768e4 | 861 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
feaa7bba | 862 | struct inode *inode = &ip->i_inode; |
951b4bd5 | 863 | struct gfs2_quota q; |
39a72580 | 864 | int err; |
e285c100 | 865 | u64 size; |
18ec7d5c | 866 | |
891a8e93 | 867 | if (gfs2_is_stuffed(ip)) { |
7a607a41 | 868 | err = gfs2_unstuff_dinode(ip); |
891a8e93 SW |
869 | if (err) |
870 | return err; | |
871 | } | |
7e619bc3 AD |
872 | |
873 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 874 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
875 | if (err < 0) |
876 | return err; | |
877 | ||
39a72580 | 878 | loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */ |
951b4bd5 | 879 | be64_add_cpu(&q.qu_value, change); |
1bdf4535 | 880 | if (((s64)be64_to_cpu(q.qu_value)) < 0) |
39a72580 | 881 | q.qu_value = 0; /* Never go negative on quota usage */ |
951b4bd5 | 882 | qd->qd_qb.qb_value = q.qu_value; |
7e619bc3 | 883 | if (fdq) { |
14bf61ff JK |
884 | if (fdq->d_fieldmask & QC_SPC_SOFT) { |
885 | q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 886 | qd->qd_qb.qb_warn = q.qu_warn; |
7e619bc3 | 887 | } |
14bf61ff JK |
888 | if (fdq->d_fieldmask & QC_SPC_HARD) { |
889 | q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 890 | qd->qd_qb.qb_limit = q.qu_limit; |
7e619bc3 | 891 | } |
14bf61ff JK |
892 | if (fdq->d_fieldmask & QC_SPACE) { |
893 | q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 894 | qd->qd_qb.qb_value = q.qu_value; |
802ec9b6 | 895 | } |
7e619bc3 AD |
896 | } |
897 | ||
adfd2b5e | 898 | err = gfs2_write_disk_quota(sdp, &q, loc); |
39a72580 AD |
899 | if (!err) { |
900 | size = loc + sizeof(struct gfs2_quota); | |
901 | if (size > inode->i_size) | |
902 | i_size_write(inode, size); | |
d85f1b5b | 903 | inode->i_mtime = inode_set_ctime_current(inode); |
39a72580 AD |
904 | mark_inode_dirty(inode); |
905 | set_bit(QDF_REFRESH, &qd->qd_flags); | |
7e619bc3 | 906 | } |
e285c100 | 907 | |
18ec7d5c SW |
908 | return err; |
909 | } | |
910 | ||
b3b94faa DT |
911 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
912 | { | |
481f6e7d | 913 | struct gfs2_sbd *sdp = (*qda)->qd_sbd; |
feaa7bba | 914 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 915 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
916 | unsigned int data_blocks, ind_blocks; |
917 | struct gfs2_holder *ghs, i_gh; | |
918 | unsigned int qx, x; | |
919 | struct gfs2_quota_data *qd; | |
71f890f7 | 920 | unsigned reserved; |
f42faf4f | 921 | loff_t offset; |
20b95bf2 | 922 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
923 | int error; |
924 | ||
925 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), | |
926 | &data_blocks, &ind_blocks); | |
927 | ||
6da2ec56 | 928 | ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
3932e507 BP |
929 | if (!ghs) |
930 | return -ENOMEM; | |
b3b94faa DT |
931 | |
932 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
5955102c | 933 | inode_lock(&ip->i_inode); |
b3b94faa | 934 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 935 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
936 | GL_NOCACHE, &ghs[qx]); |
937 | if (error) | |
2fba46a0 | 938 | goto out_dq; |
b3b94faa DT |
939 | } |
940 | ||
941 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
942 | if (error) | |
2fba46a0 | 943 | goto out_dq; |
b3b94faa DT |
944 | |
945 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 946 | offset = qd2offset(qda[x]); |
461cb419 BP |
947 | if (gfs2_write_alloc_required(ip, offset, |
948 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
949 | nalloc++; |
950 | } | |
951 | ||
20b95bf2 AD |
952 | /* |
953 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
954 | * block to the reservation unconditionally. If the inode | |
955 | * doesn't need unstuffing, the block will be released to the | |
956 | * rgrp since it won't be allocated during the transaction | |
957 | */ | |
7e619bc3 AD |
958 | /* +3 in the end for unstuffing block, inode size update block |
959 | * and another block in case quota straddles page boundary and | |
960 | * two blocks need to be updated instead of 1 */ | |
961 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 962 | |
71f890f7 | 963 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
964 | ap.target = reserved; |
965 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
966 | if (error) |
967 | goto out_alloc; | |
b3b94faa | 968 | |
20b95bf2 | 969 | if (nalloc) |
71f890f7 | 970 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
971 | |
972 | error = gfs2_trans_begin(sdp, blocks, 0); | |
973 | if (error) | |
974 | goto out_ipres; | |
b3b94faa DT |
975 | |
976 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
977 | qd = qda[x]; |
978 | offset = qd2offset(qd); | |
ee1768e4 BP |
979 | error = gfs2_adjust_quota(sdp, offset, qd->qd_change_sync, qd, |
980 | NULL); | |
18ec7d5c | 981 | if (error) |
b3b94faa | 982 | goto out_end_trans; |
b3b94faa | 983 | |
432928c9 | 984 | do_qc(qd, -qd->qd_change_sync, QC_SYNC); |
662e3a55 | 985 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
986 | } |
987 | ||
a91ea69f | 988 | out_end_trans: |
b3b94faa | 989 | gfs2_trans_end(sdp); |
a91ea69f | 990 | out_ipres: |
20b95bf2 | 991 | gfs2_inplace_release(ip); |
a91ea69f | 992 | out_alloc: |
b3b94faa | 993 | gfs2_glock_dq_uninit(&i_gh); |
2fba46a0 | 994 | out_dq: |
b3b94faa DT |
995 | while (qx--) |
996 | gfs2_glock_dq_uninit(&ghs[qx]); | |
5955102c | 997 | inode_unlock(&ip->i_inode); |
b3b94faa | 998 | kfree(ghs); |
c1696fb8 | 999 | gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl, |
805c0907 | 1000 | GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC); |
fce17cb0 BP |
1001 | if (!error) { |
1002 | for (x = 0; x < num_qd; x++) | |
1003 | qda[x]->qd_sync_gen = sdp->sd_quota_sync_gen; | |
1004 | } | |
b3b94faa DT |
1005 | return error; |
1006 | } | |
1007 | ||
e285c100 SW |
1008 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
1009 | { | |
1010 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1011 | struct gfs2_quota q; | |
1012 | struct gfs2_quota_lvb *qlvb; | |
1013 | loff_t pos; | |
1014 | int error; | |
1015 | ||
1016 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
1017 | pos = qd2offset(qd); | |
4306629e | 1018 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
1019 | if (error < 0) |
1020 | return error; | |
1021 | ||
4e2f8849 | 1022 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
1023 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
1024 | qlvb->__pad = 0; | |
1025 | qlvb->qb_limit = q.qu_limit; | |
1026 | qlvb->qb_warn = q.qu_warn; | |
1027 | qlvb->qb_value = q.qu_value; | |
1028 | qd->qd_qb = *qlvb; | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
b3b94faa DT |
1033 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
1034 | struct gfs2_holder *q_gh) | |
1035 | { | |
481f6e7d | 1036 | struct gfs2_sbd *sdp = qd->qd_sbd; |
feaa7bba | 1037 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 1038 | struct gfs2_holder i_gh; |
b3b94faa DT |
1039 | int error; |
1040 | ||
481f6e7d | 1041 | gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd); |
a91ea69f | 1042 | restart: |
b3b94faa DT |
1043 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
1044 | if (error) | |
1045 | return error; | |
1046 | ||
30133177 AD |
1047 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
1048 | force_refresh = FORCE; | |
1049 | ||
4e2f8849 | 1050 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 1051 | |
e9fc2aa0 | 1052 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 1053 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
1054 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
1055 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
1056 | if (error) |
1057 | return error; | |
1058 | ||
e9fc2aa0 | 1059 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
1060 | if (error) |
1061 | goto fail; | |
1062 | ||
e285c100 SW |
1063 | error = update_qd(sdp, qd); |
1064 | if (error) | |
1e72c0f7 | 1065 | goto fail_gunlock; |
b3b94faa | 1066 | |
e285c100 | 1067 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
1068 | gfs2_glock_dq_uninit(q_gh); |
1069 | force_refresh = 0; | |
1070 | goto restart; | |
b3b94faa DT |
1071 | } |
1072 | ||
1073 | return 0; | |
1074 | ||
a91ea69f | 1075 | fail_gunlock: |
b3b94faa | 1076 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 1077 | fail: |
b3b94faa | 1078 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
1079 | return error; |
1080 | } | |
1081 | ||
7c06b5d6 | 1082 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1083 | { |
feaa7bba | 1084 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 1085 | struct gfs2_quota_data *qd; |
b58bf407 | 1086 | u32 x; |
f511e60a | 1087 | int error; |
b3b94faa | 1088 | |
eef46ab7 BP |
1089 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON && |
1090 | sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) | |
b3b94faa DT |
1091 | return 0; |
1092 | ||
b54e9a0b BP |
1093 | error = gfs2_quota_hold(ip, uid, gid); |
1094 | if (error) | |
1095 | return error; | |
1096 | ||
1097 | sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num, | |
5407e242 | 1098 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
b3b94faa | 1099 | |
b54e9a0b BP |
1100 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1101 | qd = ip->i_qadata->qa_qd[x]; | |
1102 | error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]); | |
b3b94faa DT |
1103 | if (error) |
1104 | break; | |
1105 | } | |
1106 | ||
1107 | if (!error) | |
1108 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
1109 | else { | |
1110 | while (x--) | |
b54e9a0b | 1111 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
b3b94faa DT |
1112 | gfs2_quota_unhold(ip); |
1113 | } | |
1114 | ||
1115 | return error; | |
1116 | } | |
1117 | ||
2a4f6511 | 1118 | static bool need_sync(struct gfs2_quota_data *qd) |
b3b94faa | 1119 | { |
481f6e7d | 1120 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 1121 | struct gfs2_tune *gt = &sdp->sd_tune; |
cd915493 | 1122 | s64 value; |
b3b94faa | 1123 | unsigned int num, den; |
b3b94faa DT |
1124 | |
1125 | if (!qd->qd_qb.qb_limit) | |
2a4f6511 | 1126 | return false; |
b3b94faa | 1127 | |
7d80823e | 1128 | spin_lock(&qd_lock); |
b3b94faa | 1129 | value = qd->qd_change; |
7d80823e | 1130 | spin_unlock(&qd_lock); |
b3b94faa DT |
1131 | |
1132 | spin_lock(>->gt_spin); | |
1133 | num = gt->gt_quota_scale_num; | |
1134 | den = gt->gt_quota_scale_den; | |
1135 | spin_unlock(>->gt_spin); | |
1136 | ||
9f494e9b | 1137 | if (value <= 0) |
2a4f6511 | 1138 | return false; |
e9fc2aa0 SW |
1139 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1140 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
2a4f6511 | 1141 | return false; |
b3b94faa DT |
1142 | else { |
1143 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1144 | value = div_s64(value, den); |
e9fc2aa0 | 1145 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1146 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
2a4f6511 | 1147 | return false; |
b3b94faa DT |
1148 | } |
1149 | ||
2a4f6511 | 1150 | return true; |
b3b94faa DT |
1151 | } |
1152 | ||
1153 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1154 | { | |
aabd7c72 | 1155 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
c9ff3c65 | 1156 | struct gfs2_quota_data *qda[2 * GFS2_MAXQUOTAS]; |
b3b94faa | 1157 | unsigned int count = 0; |
b58bf407 | 1158 | u32 x; |
aabd7c72 | 1159 | int found; |
b3b94faa DT |
1160 | |
1161 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
c9cb9e38 | 1162 | return; |
b3b94faa | 1163 | |
b54e9a0b | 1164 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
b3b94faa | 1165 | struct gfs2_quota_data *qd; |
2a4f6511 | 1166 | bool sync; |
b3b94faa | 1167 | |
b54e9a0b | 1168 | qd = ip->i_qadata->qa_qd[x]; |
b3b94faa DT |
1169 | sync = need_sync(qd); |
1170 | ||
b54e9a0b | 1171 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
aabd7c72 SW |
1172 | if (!sync) |
1173 | continue; | |
1174 | ||
7d80823e | 1175 | spin_lock(&qd_lock); |
aabd7c72 | 1176 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1177 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1178 | |
1179 | if (!found) | |
1180 | continue; | |
1181 | ||
7dbc6ae6 BP |
1182 | if (!qd_bh_get_or_undo(sdp, qd)) |
1183 | qda[count++] = qd; | |
b3b94faa DT |
1184 | } |
1185 | ||
1186 | if (count) { | |
1187 | do_sync(count, qda); | |
1188 | for (x = 0; x < count; x++) | |
1189 | qd_unlock(qda[x]); | |
1190 | } | |
1191 | ||
b3b94faa DT |
1192 | gfs2_quota_unhold(ip); |
1193 | } | |
1194 | ||
1195 | #define MAX_LINE 256 | |
1196 | ||
1197 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1198 | { | |
481f6e7d | 1199 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 1200 | |
eef46ab7 BP |
1201 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) |
1202 | fs_info(sdp, "quota %s for %s %u\n", | |
1203 | type, | |
1204 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", | |
1205 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1206 | |
1207 | return 0; | |
1208 | } | |
1209 | ||
25435e5e AD |
1210 | /** |
1211 | * gfs2_quota_check - check if allocating new blocks will exceed quota | |
1212 | * @ip: The inode for which this check is being performed | |
1213 | * @uid: The uid to check against | |
1214 | * @gid: The gid to check against | |
1215 | * @ap: The allocation parameters. ap->target contains the requested | |
1216 | * blocks. ap->min_target, if set, contains the minimum blks | |
1217 | * requested. | |
1218 | * | |
1219 | * Returns: 0 on success. | |
1220 | * min_req = ap->min_target ? ap->min_target : ap->target; | |
243fea4d | 1221 | * quota must allow at least min_req blks for success and |
25435e5e AD |
1222 | * ap->allowed is set to the number of blocks allowed |
1223 | * | |
1224 | * -EDQUOT otherwise, quota violation. ap->allowed is set to number | |
1225 | * of blocks available. | |
1226 | */ | |
b8fbf471 AD |
1227 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, |
1228 | struct gfs2_alloc_parms *ap) | |
b3b94faa | 1229 | { |
feaa7bba | 1230 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1231 | struct gfs2_quota_data *qd; |
25435e5e | 1232 | s64 value, warn, limit; |
b58bf407 | 1233 | u32 x; |
b3b94faa DT |
1234 | int error = 0; |
1235 | ||
25435e5e | 1236 | ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ |
b3b94faa DT |
1237 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
1238 | return 0; | |
1239 | ||
b54e9a0b BP |
1240 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1241 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1242 | |
05e0a60d EB |
1243 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1244 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1245 | continue; |
1246 | ||
25435e5e AD |
1247 | warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn); |
1248 | limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit); | |
e9fc2aa0 | 1249 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1250 | spin_lock(&qd_lock); |
25435e5e | 1251 | value += qd->qd_change; |
7d80823e | 1252 | spin_unlock(&qd_lock); |
b3b94faa | 1253 | |
25435e5e AD |
1254 | if (limit > 0 && (limit - value) < ap->allowed) |
1255 | ap->allowed = limit - value; | |
1256 | /* If we can't meet the target */ | |
1257 | if (limit && limit < (value + (s64)ap->target)) { | |
1258 | /* If no min_target specified or we don't meet | |
1259 | * min_target, return -EDQUOT */ | |
1260 | if (!ap->min_target || ap->min_target > ap->allowed) { | |
9cde2898 AD |
1261 | if (!test_and_set_bit(QDF_QMSG_QUIET, |
1262 | &qd->qd_flags)) { | |
1263 | print_message(qd, "exceeded"); | |
1264 | quota_send_warning(qd->qd_id, | |
1265 | sdp->sd_vfs->s_dev, | |
1266 | QUOTA_NL_BHARDWARN); | |
1267 | } | |
25435e5e AD |
1268 | error = -EDQUOT; |
1269 | break; | |
1270 | } | |
1271 | } else if (warn && warn < value && | |
b3b94faa | 1272 | time_after_eq(jiffies, qd->qd_last_warn + |
25435e5e AD |
1273 | gfs2_tune_get(sdp, gt_quota_warn_period) |
1274 | * HZ)) { | |
05e0a60d | 1275 | quota_send_warning(qd->qd_id, |
2ec46505 | 1276 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1277 | error = print_message(qd, "warning"); |
1278 | qd->qd_last_warn = jiffies; | |
1279 | } | |
1280 | } | |
b3b94faa DT |
1281 | return error; |
1282 | } | |
1283 | ||
cd915493 | 1284 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1285 | kuid_t uid, kgid_t gid) |
b3b94faa | 1286 | { |
b3b94faa | 1287 | struct gfs2_quota_data *qd; |
b58bf407 | 1288 | u32 x; |
b54e9a0b | 1289 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1290 | |
eef46ab7 BP |
1291 | if ((sdp->sd_args.ar_quota != GFS2_QUOTA_ON && |
1292 | sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) || | |
b54e9a0b | 1293 | gfs2_assert_warn(sdp, change)) |
b3b94faa | 1294 | return; |
383f01fb | 1295 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1296 | return; |
1297 | ||
f9615fe3 BP |
1298 | if (gfs2_assert_withdraw(sdp, ip->i_qadata && |
1299 | ip->i_qadata->qa_ref > 0)) | |
1300 | return; | |
b54e9a0b BP |
1301 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1302 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1303 | |
05e0a60d EB |
1304 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1305 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
432928c9 | 1306 | do_qc(qd, change, QC_CHANGE); |
b3b94faa DT |
1307 | } |
1308 | } | |
1309 | } | |
1310 | ||
06aa6fd3 BP |
1311 | static bool qd_changed(struct gfs2_sbd *sdp) |
1312 | { | |
1313 | struct gfs2_quota_data *qd; | |
1314 | bool changed = false; | |
1315 | ||
1316 | spin_lock(&qd_lock); | |
1317 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1318 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
1319 | !test_bit(QDF_CHANGE, &qd->qd_flags)) | |
1320 | continue; | |
1321 | ||
1322 | changed = true; | |
1323 | break; | |
1324 | } | |
1325 | spin_unlock(&qd_lock); | |
1326 | return changed; | |
1327 | } | |
1328 | ||
ceed1723 | 1329 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1330 | { |
8c42d637 | 1331 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1332 | struct gfs2_quota_data **qda; |
f3b64b57 | 1333 | unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder); |
b3b94faa DT |
1334 | unsigned int num_qd; |
1335 | unsigned int x; | |
1336 | int error = 0; | |
1337 | ||
06aa6fd3 BP |
1338 | if (!qd_changed(sdp)) |
1339 | return 0; | |
b3b94faa | 1340 | |
b3b94faa DT |
1341 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1342 | if (!qda) | |
1343 | return -ENOMEM; | |
1344 | ||
e46c772d SW |
1345 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1346 | sdp->sd_quota_sync_gen++; | |
1347 | ||
b3b94faa DT |
1348 | do { |
1349 | num_qd = 0; | |
1350 | ||
1351 | for (;;) { | |
1352 | error = qd_fish(sdp, qda + num_qd); | |
1353 | if (error || !qda[num_qd]) | |
1354 | break; | |
1355 | if (++num_qd == max_qd) | |
1356 | break; | |
1357 | } | |
1358 | ||
1359 | if (num_qd) { | |
1360 | if (!error) | |
1361 | error = do_sync(num_qd, qda); | |
b3b94faa DT |
1362 | |
1363 | for (x = 0; x < num_qd; x++) | |
1364 | qd_unlock(qda[x]); | |
1365 | } | |
1366 | } while (!error && num_qd == max_qd); | |
1367 | ||
e46c772d | 1368 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1369 | kfree(qda); |
1370 | ||
1371 | return error; | |
1372 | } | |
1373 | ||
ed87dabc | 1374 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1375 | { |
1376 | struct gfs2_quota_data *qd; | |
1377 | struct gfs2_holder q_gh; | |
1378 | int error; | |
1379 | ||
05e0a60d | 1380 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1381 | if (error) |
1382 | return error; | |
1383 | ||
1384 | error = do_glock(qd, FORCE, &q_gh); | |
1385 | if (!error) | |
1386 | gfs2_glock_dq_uninit(&q_gh); | |
1387 | ||
1388 | qd_put(qd); | |
b3b94faa DT |
1389 | return error; |
1390 | } | |
1391 | ||
b3b94faa DT |
1392 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1393 | { | |
feaa7bba | 1394 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1395 | u64 size = i_size_read(sdp->sd_qc_inode); |
1396 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1397 | unsigned int x, slot = 0; |
1398 | unsigned int found = 0; | |
c754fbbb | 1399 | unsigned int hash; |
ee2411a8 | 1400 | unsigned int bm_size; |
cd915493 SW |
1401 | u64 dblock; |
1402 | u32 extlen = 0; | |
b3b94faa DT |
1403 | int error; |
1404 | ||
a2e0f799 | 1405 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1406 | return -EIO; |
a2e0f799 | 1407 | |
b3b94faa | 1408 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1409 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1410 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1411 | error = -ENOMEM; |
fcf10d38 | 1412 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1413 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 | 1414 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
88dca4ca | 1415 | __GFP_ZERO); |
b3b94faa DT |
1416 | if (!sdp->sd_quota_bitmap) |
1417 | return error; | |
1418 | ||
b3b94faa DT |
1419 | for (x = 0; x < blocks; x++) { |
1420 | struct buffer_head *bh; | |
7aed98fb | 1421 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1422 | unsigned int y; |
1423 | ||
1424 | if (!extlen) { | |
9153dac1 AG |
1425 | extlen = 32; |
1426 | error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen); | |
b3b94faa DT |
1427 | if (error) |
1428 | goto fail; | |
1429 | } | |
b3b94faa | 1430 | error = -EIO; |
7276b3b0 SW |
1431 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1432 | if (!bh) | |
1433 | goto fail; | |
b3b94faa DT |
1434 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1435 | brelse(bh); | |
1436 | goto fail; | |
1437 | } | |
1438 | ||
7aed98fb | 1439 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1440 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1441 | y++, slot++) { |
b3b94faa | 1442 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1443 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1444 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1445 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1446 | USRQUOTA : GRPQUOTA; | |
1447 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1448 | be32_to_cpu(qc->qc_id)); | |
1449 | qc++; | |
1450 | if (!qc_change) | |
b3b94faa DT |
1451 | continue; |
1452 | ||
c754fbbb SW |
1453 | hash = gfs2_qd_hash(sdp, qc_id); |
1454 | qd = qd_alloc(hash, sdp, qc_id); | |
1455 | if (qd == NULL) { | |
b3b94faa DT |
1456 | brelse(bh); |
1457 | goto fail; | |
1458 | } | |
1459 | ||
1460 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1461 | qd->qd_change = qc_change; |
b3b94faa | 1462 | qd->qd_slot = slot; |
0e072cac | 1463 | qd->qd_slot_ref = 1; |
b3b94faa | 1464 | |
7d80823e | 1465 | spin_lock(&qd_lock); |
ee2411a8 | 1466 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1467 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1468 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1469 | spin_unlock(&qd_lock); |
b3b94faa | 1470 | |
c754fbbb SW |
1471 | spin_lock_bucket(hash); |
1472 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1473 | spin_unlock_bucket(hash); | |
1474 | ||
b3b94faa DT |
1475 | found++; |
1476 | } | |
1477 | ||
1478 | brelse(bh); | |
1479 | dblock++; | |
1480 | extlen--; | |
1481 | } | |
1482 | ||
1483 | if (found) | |
1484 | fs_info(sdp, "found %u quota changes\n", found); | |
1485 | ||
1486 | return 0; | |
1487 | ||
a91ea69f | 1488 | fail: |
b3b94faa DT |
1489 | gfs2_quota_cleanup(sdp); |
1490 | return error; | |
1491 | } | |
1492 | ||
b3b94faa DT |
1493 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1494 | { | |
b3b94faa | 1495 | struct gfs2_quota_data *qd; |
961fe342 | 1496 | LIST_HEAD(dispose); |
a475c5dd | 1497 | int count; |
b3b94faa | 1498 | |
a475c5dd | 1499 | BUG_ON(test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); |
b3b94faa | 1500 | |
7d80823e | 1501 | spin_lock(&qd_lock); |
961fe342 | 1502 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
a475c5dd AG |
1503 | spin_lock(&qd->qd_lockref.lock); |
1504 | if (qd->qd_lockref.count != 0) { | |
1505 | spin_unlock(&qd->qd_lockref.lock); | |
1506 | continue; | |
1507 | } | |
1508 | lockref_mark_dead(&qd->qd_lockref); | |
1509 | spin_unlock(&qd->qd_lockref.lock); | |
c754fbbb | 1510 | |
2147dbfd | 1511 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
961fe342 | 1512 | list_add(&qd->qd_lru, &dispose); |
b3b94faa | 1513 | } |
7d80823e | 1514 | spin_unlock(&qd_lock); |
b3b94faa | 1515 | |
faada74a | 1516 | gfs2_qd_list_dispose(&dispose); |
a475c5dd AG |
1517 | |
1518 | wait_event_timeout(sdp->sd_kill_wait, | |
1519 | (count = atomic_read(&sdp->sd_quota_count)) == 0, | |
1520 | HZ * 60); | |
1521 | ||
1522 | if (count != 0) | |
1523 | fs_err(sdp, "%d left-over quota data objects\n", count); | |
b3b94faa | 1524 | |
3cdcf63e AV |
1525 | kvfree(sdp->sd_quota_bitmap); |
1526 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1527 | } |
1528 | ||
37b2c837 SW |
1529 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1530 | { | |
1531 | if (error == 0 || error == -EROFS) | |
1532 | return; | |
eb43e660 | 1533 | if (!gfs2_withdrawn(sdp)) { |
f34a6135 BP |
1534 | if (!cmpxchg(&sdp->sd_log_error, 0, error)) |
1535 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
942b0cdd BP |
1536 | wake_up(&sdp->sd_logd_waitq); |
1537 | } | |
37b2c837 SW |
1538 | } |
1539 | ||
1540 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1541 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1542 | unsigned long t, unsigned long *timeo, |
1543 | unsigned int *new_timeo) | |
1544 | { | |
1545 | if (t >= *timeo) { | |
8c42d637 | 1546 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1547 | quotad_error(sdp, msg, error); |
1548 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1549 | } else { | |
1550 | *timeo -= t; | |
1551 | } | |
1552 | } | |
1553 | ||
3d3c10f2 BM |
1554 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1555 | if (!sdp->sd_statfs_force_sync) { | |
1556 | sdp->sd_statfs_force_sync = 1; | |
1557 | wake_up(&sdp->sd_quota_wait); | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | ||
37b2c837 SW |
1562 | /** |
1563 | * gfs2_quotad - Write cached quota changes into the quota file | |
c551f66c | 1564 | * @data: Pointer to GFS2 superblock |
37b2c837 SW |
1565 | * |
1566 | */ | |
1567 | ||
1568 | int gfs2_quotad(void *data) | |
1569 | { | |
1570 | struct gfs2_sbd *sdp = data; | |
1571 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1572 | unsigned long statfs_timeo = 0; | |
1573 | unsigned long quotad_timeo = 0; | |
1574 | unsigned long t = 0; | |
37b2c837 SW |
1575 | |
1576 | while (!kthread_should_stop()) { | |
601ef0d5 | 1577 | if (gfs2_withdrawn(sdp)) |
fe0690f0 AG |
1578 | break; |
1579 | ||
37b2c837 | 1580 | /* Update the master statfs file */ |
3d3c10f2 BM |
1581 | if (sdp->sd_statfs_force_sync) { |
1582 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1583 | quotad_error(sdp, "statfs", error); | |
1584 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1585 | } | |
1586 | else | |
1587 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1588 | &statfs_timeo, | |
1589 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1590 | |
1591 | /* Update quota file */ | |
edd2e9ac | 1592 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1593 | "ad_timeo, &tune->gt_quota_quantum); |
1594 | ||
a0acae0e TH |
1595 | try_to_freeze(); |
1596 | ||
37b2c837 SW |
1597 | t = min(quotad_timeo, statfs_timeo); |
1598 | ||
e4a8b548 | 1599 | t = wait_event_interruptible_timeout(sdp->sd_quota_wait, |
fe0690f0 AG |
1600 | sdp->sd_statfs_force_sync || |
1601 | gfs2_withdrawn(sdp) || | |
1602 | kthread_should_stop(), | |
e4a8b548 AG |
1603 | t); |
1604 | ||
1605 | if (sdp->sd_statfs_force_sync) | |
813e0c46 | 1606 | t = 0; |
37b2c837 SW |
1607 | } |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | ||
e54b2e2d | 1612 | static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state) |
1d371b5e SW |
1613 | { |
1614 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1615 | ||
e54b2e2d | 1616 | memset(state, 0, sizeof(*state)); |
ad6bb90f CH |
1617 | |
1618 | switch (sdp->sd_args.ar_quota) { | |
eef46ab7 BP |
1619 | case GFS2_QUOTA_QUIET: |
1620 | fallthrough; | |
ad6bb90f | 1621 | case GFS2_QUOTA_ON: |
e54b2e2d JK |
1622 | state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; |
1623 | state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; | |
df561f66 | 1624 | fallthrough; |
ad6bb90f | 1625 | case GFS2_QUOTA_ACCOUNT: |
e54b2e2d JK |
1626 | state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED | |
1627 | QCI_SYSFILE; | |
1628 | state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED | | |
1629 | QCI_SYSFILE; | |
ad6bb90f CH |
1630 | break; |
1631 | case GFS2_QUOTA_OFF: | |
1632 | break; | |
1633 | } | |
1d371b5e | 1634 | if (sdp->sd_quota_inode) { |
e54b2e2d JK |
1635 | state->s_state[USRQUOTA].ino = |
1636 | GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1637 | state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks; | |
1d371b5e | 1638 | } |
e54b2e2d JK |
1639 | state->s_state[USRQUOTA].nextents = 1; /* unsupported */ |
1640 | state->s_state[GRPQUOTA] = state->s_state[USRQUOTA]; | |
1641 | state->s_incoredqs = list_lru_count(&gfs2_qd_lru); | |
1d371b5e SW |
1642 | return 0; |
1643 | } | |
1644 | ||
74a8a103 | 1645 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1646 | struct qc_dqblk *fdq) |
113d6b3c SW |
1647 | { |
1648 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1649 | struct gfs2_quota_lvb *qlvb; | |
1650 | struct gfs2_quota_data *qd; | |
1651 | struct gfs2_holder q_gh; | |
1652 | int error; | |
1653 | ||
14bf61ff | 1654 | memset(fdq, 0, sizeof(*fdq)); |
113d6b3c SW |
1655 | |
1656 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1657 | return -ESRCH; /* Crazy XFS error code */ | |
1658 | ||
236c64e4 EB |
1659 | if ((qid.type != USRQUOTA) && |
1660 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1661 | return -EINVAL; |
1662 | ||
05e0a60d | 1663 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1664 | if (error) |
1665 | return error; | |
1666 | error = do_glock(qd, FORCE, &q_gh); | |
1667 | if (error) | |
1668 | goto out; | |
1669 | ||
4e2f8849 | 1670 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
14bf61ff JK |
1671 | fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift; |
1672 | fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift; | |
1673 | fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift; | |
113d6b3c SW |
1674 | |
1675 | gfs2_glock_dq_uninit(&q_gh); | |
1676 | out: | |
1677 | qd_put(qd); | |
1678 | return error; | |
1679 | } | |
1680 | ||
e285c100 | 1681 | /* GFS2 only supports a subset of the XFS fields */ |
14bf61ff | 1682 | #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE) |
e285c100 | 1683 | |
74a8a103 | 1684 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1685 | struct qc_dqblk *fdq) |
e285c100 SW |
1686 | { |
1687 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1688 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1689 | struct gfs2_quota_data *qd; | |
1690 | struct gfs2_holder q_gh, i_gh; | |
1691 | unsigned int data_blocks, ind_blocks; | |
1692 | unsigned int blocks = 0; | |
1693 | int alloc_required; | |
e285c100 SW |
1694 | loff_t offset; |
1695 | int error; | |
1696 | ||
1697 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1698 | return -ESRCH; /* Crazy XFS error code */ | |
1699 | ||
236c64e4 EB |
1700 | if ((qid.type != USRQUOTA) && |
1701 | (qid.type != GRPQUOTA)) | |
e285c100 | 1702 | return -EINVAL; |
e285c100 SW |
1703 | |
1704 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1705 | return -EINVAL; | |
e285c100 | 1706 | |
05e0a60d | 1707 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1708 | if (error) |
1709 | return error; | |
1710 | ||
2fba46a0 | 1711 | error = gfs2_qa_get(ip); |
0a305e49 BP |
1712 | if (error) |
1713 | goto out_put; | |
1714 | ||
5955102c | 1715 | inode_lock(&ip->i_inode); |
e285c100 SW |
1716 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); |
1717 | if (error) | |
0a305e49 | 1718 | goto out_unlockput; |
e285c100 SW |
1719 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1720 | if (error) | |
1721 | goto out_q; | |
1722 | ||
1723 | /* Check for existing entry, if none then alloc new blocks */ | |
1724 | error = update_qd(sdp, qd); | |
1725 | if (error) | |
1726 | goto out_i; | |
1727 | ||
1728 | /* If nothing has changed, this is a no-op */ | |
14bf61ff JK |
1729 | if ((fdq->d_fieldmask & QC_SPC_SOFT) && |
1730 | ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) | |
1731 | fdq->d_fieldmask ^= QC_SPC_SOFT; | |
802ec9b6 | 1732 | |
14bf61ff JK |
1733 | if ((fdq->d_fieldmask & QC_SPC_HARD) && |
1734 | ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) | |
1735 | fdq->d_fieldmask ^= QC_SPC_HARD; | |
802ec9b6 | 1736 | |
14bf61ff JK |
1737 | if ((fdq->d_fieldmask & QC_SPACE) && |
1738 | ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1739 | fdq->d_fieldmask ^= QC_SPACE; | |
802ec9b6 | 1740 | |
e285c100 SW |
1741 | if (fdq->d_fieldmask == 0) |
1742 | goto out_i; | |
1743 | ||
1744 | offset = qd2offset(qd); | |
461cb419 | 1745 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1746 | if (gfs2_is_stuffed(ip)) |
1747 | alloc_required = 1; | |
e285c100 | 1748 | if (alloc_required) { |
7b9cff46 | 1749 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1750 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1751 | &data_blocks, &ind_blocks); | |
564e12b1 | 1752 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1753 | ap.target = blocks; |
1754 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1755 | if (error) |
564e12b1 | 1756 | goto out_i; |
71f890f7 | 1757 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1758 | } |
1759 | ||
e79a46a0 AD |
1760 | /* Some quotas span block boundaries and can update two blocks, |
1761 | adding an extra block to the transaction to handle such quotas */ | |
1762 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1763 | if (error) |
1764 | goto out_release; | |
1765 | ||
1766 | /* Apply changes */ | |
ee1768e4 | 1767 | error = gfs2_adjust_quota(sdp, offset, 0, qd, fdq); |
9cde2898 AD |
1768 | if (!error) |
1769 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
e285c100 SW |
1770 | |
1771 | gfs2_trans_end(sdp); | |
1772 | out_release: | |
564e12b1 | 1773 | if (alloc_required) |
e285c100 | 1774 | gfs2_inplace_release(ip); |
e285c100 SW |
1775 | out_i: |
1776 | gfs2_glock_dq_uninit(&i_gh); | |
1777 | out_q: | |
1778 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1779 | out_unlockput: |
2fba46a0 | 1780 | gfs2_qa_put(ip); |
5955102c | 1781 | inode_unlock(&ip->i_inode); |
0a305e49 | 1782 | out_put: |
e285c100 SW |
1783 | qd_put(qd); |
1784 | return error; | |
1785 | } | |
1786 | ||
cc632e7f SW |
1787 | const struct quotactl_ops gfs2_quotactl_ops = { |
1788 | .quota_sync = gfs2_quota_sync, | |
e54b2e2d | 1789 | .get_state = gfs2_quota_get_state, |
b9b2dd36 | 1790 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1791 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1792 | }; |
c754fbbb SW |
1793 | |
1794 | void __init gfs2_quota_hash_init(void) | |
1795 | { | |
1796 | unsigned i; | |
1797 | ||
1798 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1799 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1800 | } |