Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | /* | |
11 | * Quota change tags are associated with each transaction that allocates or | |
12 | * deallocates space. Those changes are accumulated locally to each node (in a | |
13 | * per-node file) and then are periodically synced to the quota file. This | |
14 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
15 | * fuzziness in the current usage value of IDs that are being used on different | |
16 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
17 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 18 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
19 | * program to be run on node crashes or anything like that. |
20 | * | |
21 | * There are couple of knobs that let the administrator manage the quota | |
22 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
23 | * sitting on one node before being synced to the quota file. (The default is | |
24 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
25 | * of quota file syncs increases as the user moves closer to their limit. The | |
26 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
27 | * means that there is more contention between the nodes for the quota file. | |
28 | * The default value is one. This sets the maximum theoretical quota overrun | |
29 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
30 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
31 | * number greater than one makes quota syncs more frequent and reduces the | |
32 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
33 | * syncs less frequent. | |
34 | * | |
35 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
36 | * the quota file, so it is not being constantly read. | |
37 | */ | |
38 | ||
d77d1b58 JP |
39 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
40 | ||
b3b94faa DT |
41 | #include <linux/sched.h> |
42 | #include <linux/slab.h> | |
1495f230 | 43 | #include <linux/mm.h> |
b3b94faa DT |
44 | #include <linux/spinlock.h> |
45 | #include <linux/completion.h> | |
46 | #include <linux/buffer_head.h> | |
b3b94faa | 47 | #include <linux/sort.h> |
18ec7d5c | 48 | #include <linux/fs.h> |
2e565bb6 | 49 | #include <linux/bio.h> |
5c676f6d | 50 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
51 | #include <linux/kthread.h> |
52 | #include <linux/freezer.h> | |
2ec46505 | 53 | #include <linux/quota.h> |
1d371b5e | 54 | #include <linux/dqblk_xfs.h> |
9b9f039d | 55 | #include <linux/lockref.h> |
2147dbfd | 56 | #include <linux/list_lru.h> |
c754fbbb SW |
57 | #include <linux/rcupdate.h> |
58 | #include <linux/rculist_bl.h> | |
59 | #include <linux/bit_spinlock.h> | |
60 | #include <linux/jhash.h> | |
1e3d3620 | 61 | #include <linux/vmalloc.h> |
b3b94faa DT |
62 | |
63 | #include "gfs2.h" | |
5c676f6d | 64 | #include "incore.h" |
b3b94faa DT |
65 | #include "bmap.h" |
66 | #include "glock.h" | |
67 | #include "glops.h" | |
b3b94faa DT |
68 | #include "log.h" |
69 | #include "meta_io.h" | |
70 | #include "quota.h" | |
71 | #include "rgrp.h" | |
72 | #include "super.h" | |
73 | #include "trans.h" | |
18ec7d5c | 74 | #include "inode.h" |
5c676f6d | 75 | #include "util.h" |
b3b94faa | 76 | |
c754fbbb SW |
77 | #define GFS2_QD_HASH_SHIFT 12 |
78 | #define GFS2_QD_HASH_SIZE (1 << GFS2_QD_HASH_SHIFT) | |
79 | #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1) | |
80 | ||
81 | /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */ | |
2d9e7230 | 82 | /* -> sd_bitmap_lock */ |
7d80823e | 83 | static DEFINE_SPINLOCK(qd_lock); |
2147dbfd | 84 | struct list_lru gfs2_qd_lru; |
0a7ab79c | 85 | |
c754fbbb SW |
86 | static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE]; |
87 | ||
88 | static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp, | |
89 | const struct kqid qid) | |
90 | { | |
91 | unsigned int h; | |
92 | ||
93 | h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0); | |
94 | h = jhash(&qid, sizeof(struct kqid), h); | |
95 | ||
96 | return h & GFS2_QD_HASH_MASK; | |
97 | } | |
98 | ||
99 | static inline void spin_lock_bucket(unsigned int hash) | |
100 | { | |
101 | hlist_bl_lock(&qd_hash_table[hash]); | |
102 | } | |
103 | ||
104 | static inline void spin_unlock_bucket(unsigned int hash) | |
105 | { | |
106 | hlist_bl_unlock(&qd_hash_table[hash]); | |
107 | } | |
108 | ||
109 | static void gfs2_qd_dealloc(struct rcu_head *rcu) | |
110 | { | |
111 | struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu); | |
112 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
113 | } | |
114 | ||
2147dbfd | 115 | static void gfs2_qd_dispose(struct list_head *list) |
0a7ab79c AD |
116 | { |
117 | struct gfs2_quota_data *qd; | |
118 | struct gfs2_sbd *sdp; | |
0a7ab79c | 119 | |
2147dbfd SW |
120 | while (!list_empty(list)) { |
121 | qd = list_entry(list->next, struct gfs2_quota_data, qd_lru); | |
15562c43 | 122 | sdp = qd->qd_gl->gl_name.ln_sbd; |
0a7ab79c | 123 | |
2147dbfd SW |
124 | list_del(&qd->qd_lru); |
125 | ||
0a7ab79c | 126 | /* Free from the filesystem-specific list */ |
2147dbfd | 127 | spin_lock(&qd_lock); |
0a7ab79c | 128 | list_del(&qd->qd_list); |
2147dbfd | 129 | spin_unlock(&qd_lock); |
0a7ab79c | 130 | |
c754fbbb SW |
131 | spin_lock_bucket(qd->qd_hash); |
132 | hlist_bl_del_rcu(&qd->qd_hlist); | |
133 | spin_unlock_bucket(qd->qd_hash); | |
134 | ||
0a7ab79c AD |
135 | gfs2_assert_warn(sdp, !qd->qd_change); |
136 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
137 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
138 | ||
f057f6cd | 139 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
140 | atomic_dec(&sdp->sd_quota_count); |
141 | ||
142 | /* Delete it from the common reclaim list */ | |
c754fbbb | 143 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
0a7ab79c | 144 | } |
2147dbfd SW |
145 | } |
146 | ||
147 | ||
3f97b163 VD |
148 | static enum lru_status gfs2_qd_isolate(struct list_head *item, |
149 | struct list_lru_one *lru, spinlock_t *lru_lock, void *arg) | |
2147dbfd SW |
150 | { |
151 | struct list_head *dispose = arg; | |
152 | struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru); | |
153 | ||
154 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
155 | return LRU_SKIP; | |
156 | ||
157 | if (qd->qd_lockref.count == 0) { | |
158 | lockref_mark_dead(&qd->qd_lockref); | |
3f97b163 | 159 | list_lru_isolate_move(lru, &qd->qd_lru, dispose); |
2147dbfd SW |
160 | } |
161 | ||
162 | spin_unlock(&qd->qd_lockref.lock); | |
163 | return LRU_REMOVED; | |
164 | } | |
165 | ||
166 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
167 | struct shrink_control *sc) | |
168 | { | |
169 | LIST_HEAD(dispose); | |
170 | unsigned long freed; | |
171 | ||
172 | if (!(sc->gfp_mask & __GFP_FS)) | |
173 | return SHRINK_STOP; | |
174 | ||
503c358c VD |
175 | freed = list_lru_shrink_walk(&gfs2_qd_lru, sc, |
176 | gfs2_qd_isolate, &dispose); | |
2147dbfd SW |
177 | |
178 | gfs2_qd_dispose(&dispose); | |
179 | ||
1ab6c499 DC |
180 | return freed; |
181 | } | |
0a7ab79c | 182 | |
2147dbfd SW |
183 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
184 | struct shrink_control *sc) | |
1ab6c499 | 185 | { |
503c358c | 186 | return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); |
0a7ab79c AD |
187 | } |
188 | ||
2147dbfd SW |
189 | struct shrinker gfs2_qd_shrinker = { |
190 | .count_objects = gfs2_qd_shrink_count, | |
191 | .scan_objects = gfs2_qd_shrink_scan, | |
192 | .seeks = DEFAULT_SEEKS, | |
193 | .flags = SHRINKER_NUMA_AWARE, | |
194 | }; | |
195 | ||
196 | ||
2f6c9896 EB |
197 | static u64 qd2index(struct gfs2_quota_data *qd) |
198 | { | |
05e0a60d EB |
199 | struct kqid qid = qd->qd_id; |
200 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 201 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
202 | } |
203 | ||
cd915493 | 204 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 205 | { |
cd915493 | 206 | u64 offset; |
b3b94faa | 207 | |
2f6c9896 | 208 | offset = qd2index(qd); |
b3b94faa DT |
209 | offset *= sizeof(struct gfs2_quota); |
210 | ||
211 | return offset; | |
212 | } | |
213 | ||
c754fbbb | 214 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
215 | { |
216 | struct gfs2_quota_data *qd; | |
217 | int error; | |
218 | ||
37b2c837 | 219 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 220 | if (!qd) |
c754fbbb | 221 | return NULL; |
b3b94faa | 222 | |
c754fbbb | 223 | qd->qd_sbd = sdp; |
9b9f039d SW |
224 | qd->qd_lockref.count = 1; |
225 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 226 | qd->qd_id = qid; |
b3b94faa | 227 | qd->qd_slot = -1; |
2147dbfd | 228 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 229 | qd->qd_hash = hash; |
b3b94faa | 230 | |
2f6c9896 | 231 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
232 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
233 | if (error) | |
234 | goto fail; | |
235 | ||
c754fbbb | 236 | return qd; |
b3b94faa | 237 | |
a91ea69f | 238 | fail: |
37b2c837 | 239 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 240 | return NULL; |
b3b94faa DT |
241 | } |
242 | ||
c754fbbb SW |
243 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
244 | const struct gfs2_sbd *sdp, | |
245 | struct kqid qid) | |
b3b94faa | 246 | { |
c754fbbb SW |
247 | struct gfs2_quota_data *qd; |
248 | struct hlist_bl_node *h; | |
b3b94faa | 249 | |
c754fbbb SW |
250 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
251 | if (!qid_eq(qd->qd_id, qid)) | |
252 | continue; | |
253 | if (qd->qd_sbd != sdp) | |
254 | continue; | |
255 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
256 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
257 | return qd; | |
b3b94faa | 258 | } |
c754fbbb | 259 | } |
b3b94faa | 260 | |
c754fbbb SW |
261 | return NULL; |
262 | } | |
b3b94faa | 263 | |
b3b94faa | 264 | |
c754fbbb SW |
265 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
266 | struct gfs2_quota_data **qdp) | |
267 | { | |
268 | struct gfs2_quota_data *qd, *new_qd; | |
269 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 270 | |
c754fbbb SW |
271 | rcu_read_lock(); |
272 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
273 | rcu_read_unlock(); | |
b3b94faa | 274 | |
c754fbbb SW |
275 | if (qd) |
276 | return 0; | |
277 | ||
278 | new_qd = qd_alloc(hash, sdp, qid); | |
279 | if (!new_qd) | |
280 | return -ENOMEM; | |
281 | ||
282 | spin_lock(&qd_lock); | |
283 | spin_lock_bucket(hash); | |
284 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
285 | if (qd == NULL) { | |
286 | *qdp = new_qd; | |
287 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
288 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
289 | atomic_inc(&sdp->sd_quota_count); | |
290 | } | |
291 | spin_unlock_bucket(hash); | |
292 | spin_unlock(&qd_lock); | |
293 | ||
294 | if (qd) { | |
295 | gfs2_glock_put(new_qd->qd_gl); | |
296 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 297 | } |
c754fbbb SW |
298 | |
299 | return 0; | |
b3b94faa DT |
300 | } |
301 | ||
c754fbbb | 302 | |
b3b94faa DT |
303 | static void qd_hold(struct gfs2_quota_data *qd) |
304 | { | |
15562c43 | 305 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
9b9f039d SW |
306 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
307 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
308 | } |
309 | ||
310 | static void qd_put(struct gfs2_quota_data *qd) | |
311 | { | |
2147dbfd SW |
312 | if (lockref_put_or_lock(&qd->qd_lockref)) |
313 | return; | |
9b9f039d | 314 | |
2147dbfd SW |
315 | qd->qd_lockref.count = 0; |
316 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
317 | spin_unlock(&qd->qd_lockref.lock); | |
9b9f039d | 318 | |
b3b94faa DT |
319 | } |
320 | ||
321 | static int slot_get(struct gfs2_quota_data *qd) | |
322 | { | |
ee2411a8 SW |
323 | struct gfs2_sbd *sdp = qd->qd_sbd; |
324 | unsigned int bit; | |
325 | int error = 0; | |
b3b94faa | 326 | |
2d9e7230 | 327 | spin_lock(&sdp->sd_bitmap_lock); |
ee2411a8 SW |
328 | if (qd->qd_slot_count != 0) |
329 | goto out; | |
b3b94faa | 330 | |
ee2411a8 SW |
331 | error = -ENOSPC; |
332 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots); | |
333 | if (bit < sdp->sd_quota_slots) { | |
334 | set_bit(bit, sdp->sd_quota_bitmap); | |
335 | qd->qd_slot = bit; | |
e9fb7c73 | 336 | error = 0; |
ee2411a8 SW |
337 | out: |
338 | qd->qd_slot_count++; | |
b3b94faa | 339 | } |
2d9e7230 | 340 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa | 341 | |
ee2411a8 | 342 | return error; |
b3b94faa DT |
343 | } |
344 | ||
345 | static void slot_hold(struct gfs2_quota_data *qd) | |
346 | { | |
ee2411a8 | 347 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 348 | |
2d9e7230 | 349 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
350 | gfs2_assert(sdp, qd->qd_slot_count); |
351 | qd->qd_slot_count++; | |
2d9e7230 | 352 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
353 | } |
354 | ||
355 | static void slot_put(struct gfs2_quota_data *qd) | |
356 | { | |
ee2411a8 | 357 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 358 | |
2d9e7230 | 359 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
360 | gfs2_assert(sdp, qd->qd_slot_count); |
361 | if (!--qd->qd_slot_count) { | |
ee2411a8 | 362 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
363 | qd->qd_slot = -1; |
364 | } | |
2d9e7230 | 365 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
366 | } |
367 | ||
368 | static int bh_get(struct gfs2_quota_data *qd) | |
369 | { | |
15562c43 | 370 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 371 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 372 | unsigned int block, offset; |
b3b94faa DT |
373 | struct buffer_head *bh; |
374 | int error; | |
23591256 | 375 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 376 | |
f55ab26a | 377 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
378 | |
379 | if (qd->qd_bh_count++) { | |
f55ab26a | 380 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
381 | return 0; |
382 | } | |
383 | ||
384 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 385 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 386 | |
23591256 | 387 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 388 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
389 | if (error) |
390 | goto fail; | |
c8d57703 | 391 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, 0, &bh); |
b3b94faa DT |
392 | if (error) |
393 | goto fail; | |
394 | error = -EIO; | |
395 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
396 | goto fail_brelse; | |
397 | ||
398 | qd->qd_bh = bh; | |
399 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
400 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
401 | offset * sizeof(struct gfs2_quota_change)); | |
402 | ||
2e95b665 | 403 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
404 | |
405 | return 0; | |
406 | ||
a91ea69f | 407 | fail_brelse: |
b3b94faa | 408 | brelse(bh); |
a91ea69f | 409 | fail: |
b3b94faa | 410 | qd->qd_bh_count--; |
f55ab26a | 411 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
412 | return error; |
413 | } | |
414 | ||
415 | static void bh_put(struct gfs2_quota_data *qd) | |
416 | { | |
15562c43 | 417 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 418 | |
f55ab26a | 419 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
420 | gfs2_assert(sdp, qd->qd_bh_count); |
421 | if (!--qd->qd_bh_count) { | |
422 | brelse(qd->qd_bh); | |
423 | qd->qd_bh = NULL; | |
424 | qd->qd_bh_qc = NULL; | |
425 | } | |
f55ab26a | 426 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
427 | } |
428 | ||
1bf59bf6 SW |
429 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
430 | u64 *sync_gen) | |
431 | { | |
432 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
433 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
434 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
435 | return 0; | |
436 | ||
2147dbfd SW |
437 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
438 | return 0; | |
1bf59bf6 | 439 | |
2147dbfd | 440 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 441 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 442 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 443 | slot_hold(qd); |
1bf59bf6 SW |
444 | return 1; |
445 | } | |
446 | ||
b3b94faa DT |
447 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
448 | { | |
449 | struct gfs2_quota_data *qd = NULL; | |
450 | int error; | |
451 | int found = 0; | |
452 | ||
453 | *qdp = NULL; | |
454 | ||
455 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
456 | return 0; | |
457 | ||
7d80823e | 458 | spin_lock(&qd_lock); |
b3b94faa DT |
459 | |
460 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
461 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
462 | if (found) | |
463 | break; | |
b3b94faa DT |
464 | } |
465 | ||
466 | if (!found) | |
467 | qd = NULL; | |
468 | ||
7d80823e | 469 | spin_unlock(&qd_lock); |
b3b94faa DT |
470 | |
471 | if (qd) { | |
472 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
473 | error = bh_get(qd); | |
474 | if (error) { | |
475 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
476 | slot_put(qd); | |
477 | qd_put(qd); | |
478 | return error; | |
479 | } | |
480 | } | |
481 | ||
482 | *qdp = qd; | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
b3b94faa DT |
487 | static void qd_unlock(struct gfs2_quota_data *qd) |
488 | { | |
15562c43 | 489 | gfs2_assert_warn(qd->qd_gl->gl_name.ln_sbd, |
568f4c96 | 490 | test_bit(QDF_LOCKED, &qd->qd_flags)); |
b3b94faa DT |
491 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
492 | bh_put(qd); | |
493 | slot_put(qd); | |
494 | qd_put(qd); | |
495 | } | |
496 | ||
b59c8b6f | 497 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
498 | struct gfs2_quota_data **qdp) |
499 | { | |
500 | int error; | |
501 | ||
05e0a60d | 502 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
503 | if (error) |
504 | return error; | |
505 | ||
506 | error = slot_get(*qdp); | |
507 | if (error) | |
508 | goto fail; | |
509 | ||
510 | error = bh_get(*qdp); | |
511 | if (error) | |
512 | goto fail_slot; | |
513 | ||
514 | return 0; | |
515 | ||
a91ea69f | 516 | fail_slot: |
b3b94faa | 517 | slot_put(*qdp); |
a91ea69f | 518 | fail: |
b3b94faa DT |
519 | qd_put(*qdp); |
520 | return error; | |
521 | } | |
522 | ||
523 | static void qdsb_put(struct gfs2_quota_data *qd) | |
524 | { | |
525 | bh_put(qd); | |
526 | slot_put(qd); | |
527 | qd_put(qd); | |
528 | } | |
529 | ||
b54e9a0b BP |
530 | /** |
531 | * gfs2_qa_alloc - make sure we have a quota allocations data structure, | |
532 | * if necessary | |
533 | * @ip: the inode for this reservation | |
534 | */ | |
535 | int gfs2_qa_alloc(struct gfs2_inode *ip) | |
536 | { | |
537 | int error = 0; | |
538 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
539 | ||
540 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
541 | return 0; | |
542 | ||
543 | down_write(&ip->i_rw_mutex); | |
544 | if (ip->i_qadata == NULL) { | |
545 | ip->i_qadata = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS); | |
546 | if (!ip->i_qadata) | |
547 | error = -ENOMEM; | |
548 | } | |
549 | up_write(&ip->i_rw_mutex); | |
550 | return error; | |
551 | } | |
552 | ||
a097dc7e | 553 | void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount) |
b54e9a0b BP |
554 | { |
555 | down_write(&ip->i_rw_mutex); | |
a097dc7e | 556 | if (ip->i_qadata && ((wcount == NULL) || (atomic_read(wcount) <= 1))) { |
b54e9a0b BP |
557 | kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata); |
558 | ip->i_qadata = NULL; | |
559 | } | |
560 | up_write(&ip->i_rw_mutex); | |
561 | } | |
562 | ||
7c06b5d6 | 563 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 564 | { |
feaa7bba | 565 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 566 | struct gfs2_quota_data **qd; |
b3b94faa DT |
567 | int error; |
568 | ||
b54e9a0b BP |
569 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
570 | return 0; | |
571 | ||
572 | if (ip->i_qadata == NULL) { | |
573 | error = gfs2_rsqa_alloc(ip); | |
aaaf68c5 AP |
574 | if (error) |
575 | return error; | |
576 | } | |
5407e242 | 577 | |
b54e9a0b | 578 | qd = ip->i_qadata->qa_qd; |
5407e242 | 579 | |
b54e9a0b | 580 | if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) || |
b3b94faa DT |
581 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
582 | return -EIO; | |
583 | ||
b59c8b6f | 584 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
585 | if (error) |
586 | goto out; | |
b54e9a0b | 587 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
588 | qd++; |
589 | ||
b59c8b6f | 590 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
591 | if (error) |
592 | goto out; | |
b54e9a0b | 593 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
594 | qd++; |
595 | ||
6b24c0d2 EB |
596 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
597 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 598 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
599 | if (error) |
600 | goto out; | |
b54e9a0b | 601 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
602 | qd++; |
603 | } | |
604 | ||
6b24c0d2 EB |
605 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
606 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 607 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
608 | if (error) |
609 | goto out; | |
b54e9a0b | 610 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
611 | qd++; |
612 | } | |
613 | ||
a91ea69f | 614 | out: |
b3b94faa DT |
615 | if (error) |
616 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
617 | return error; |
618 | } | |
619 | ||
620 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
621 | { | |
feaa7bba | 622 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b58bf407 | 623 | u32 x; |
b3b94faa | 624 | |
b54e9a0b | 625 | if (ip->i_qadata == NULL) |
5407e242 | 626 | return; |
b3b94faa DT |
627 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
628 | ||
b54e9a0b BP |
629 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
630 | qdsb_put(ip->i_qadata->qa_qd[x]); | |
631 | ip->i_qadata->qa_qd[x] = NULL; | |
b3b94faa | 632 | } |
b54e9a0b | 633 | ip->i_qadata->qa_qd_num = 0; |
b3b94faa DT |
634 | } |
635 | ||
636 | static int sort_qd(const void *a, const void *b) | |
637 | { | |
48fac179 SW |
638 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
639 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 640 | |
05e0a60d | 641 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 642 | return -1; |
05e0a60d | 643 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 644 | return 1; |
48fac179 | 645 | return 0; |
b3b94faa DT |
646 | } |
647 | ||
cd915493 | 648 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa | 649 | { |
15562c43 | 650 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 651 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 652 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 653 | s64 x; |
b3b94faa | 654 | |
f55ab26a | 655 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 656 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
657 | |
658 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
659 | qc->qc_change = 0; | |
660 | qc->qc_flags = 0; | |
05e0a60d | 661 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 662 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 663 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
664 | } |
665 | ||
b44b84d7 | 666 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
667 | qc->qc_change = cpu_to_be64(x); |
668 | ||
7d80823e | 669 | spin_lock(&qd_lock); |
b3b94faa | 670 | qd->qd_change = x; |
7d80823e | 671 | spin_unlock(&qd_lock); |
b3b94faa DT |
672 | |
673 | if (!x) { | |
674 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
675 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
676 | qc->qc_flags = 0; | |
677 | qc->qc_id = 0; | |
678 | slot_put(qd); | |
679 | qd_put(qd); | |
680 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
681 | qd_hold(qd); | |
682 | slot_hold(qd); | |
683 | } | |
907b9bce | 684 | |
9cde2898 AD |
685 | if (change < 0) /* Reset quiet flag if we freed some blocks */ |
686 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
f55ab26a | 687 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
688 | } |
689 | ||
39a72580 AD |
690 | static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index, |
691 | unsigned off, void *buf, unsigned bytes) | |
692 | { | |
693 | struct inode *inode = &ip->i_inode; | |
694 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
695 | struct address_space *mapping = inode->i_mapping; | |
696 | struct page *page; | |
697 | struct buffer_head *bh; | |
698 | void *kaddr; | |
699 | u64 blk; | |
700 | unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0; | |
701 | unsigned to_write = bytes, pg_off = off; | |
702 | int done = 0; | |
703 | ||
704 | blk = index << (PAGE_CACHE_SHIFT - sdp->sd_sb.sb_bsize_shift); | |
705 | boff = off % bsize; | |
706 | ||
707 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
708 | if (!page) | |
709 | return -ENOMEM; | |
710 | if (!page_has_buffers(page)) | |
711 | create_empty_buffers(page, bsize, 0); | |
712 | ||
713 | bh = page_buffers(page); | |
714 | while (!done) { | |
715 | /* Find the beginning block within the page */ | |
716 | if (pg_off >= ((bnum * bsize) + bsize)) { | |
717 | bh = bh->b_this_page; | |
718 | bnum++; | |
719 | blk++; | |
720 | continue; | |
721 | } | |
722 | if (!buffer_mapped(bh)) { | |
723 | gfs2_block_map(inode, blk, bh, 1); | |
724 | if (!buffer_mapped(bh)) | |
725 | goto unlock_out; | |
726 | /* If it's a newly allocated disk block, zero it */ | |
727 | if (buffer_new(bh)) | |
728 | zero_user(page, bnum * bsize, bh->b_size); | |
729 | } | |
730 | if (PageUptodate(page)) | |
731 | set_buffer_uptodate(bh); | |
732 | if (!buffer_uptodate(bh)) { | |
733 | ll_rw_block(READ | REQ_META, 1, &bh); | |
734 | wait_on_buffer(bh); | |
735 | if (!buffer_uptodate(bh)) | |
736 | goto unlock_out; | |
737 | } | |
738 | gfs2_trans_add_data(ip->i_gl, bh); | |
739 | ||
740 | /* If we need to write to the next block as well */ | |
741 | if (to_write > (bsize - boff)) { | |
742 | pg_off += (bsize - boff); | |
743 | to_write -= (bsize - boff); | |
744 | boff = pg_off % bsize; | |
745 | continue; | |
746 | } | |
747 | done = 1; | |
748 | } | |
749 | ||
750 | /* Write to the page, now that we have setup the buffer(s) */ | |
751 | kaddr = kmap_atomic(page); | |
752 | memcpy(kaddr + off, buf, bytes); | |
753 | flush_dcache_page(page); | |
754 | kunmap_atomic(kaddr); | |
755 | unlock_page(page); | |
756 | page_cache_release(page); | |
757 | ||
758 | return 0; | |
759 | ||
760 | unlock_out: | |
761 | unlock_page(page); | |
762 | page_cache_release(page); | |
763 | return -EIO; | |
764 | } | |
765 | ||
766 | static int gfs2_write_disk_quota(struct gfs2_inode *ip, struct gfs2_quota *qp, | |
767 | loff_t loc) | |
768 | { | |
769 | unsigned long pg_beg; | |
770 | unsigned pg_off, nbytes, overflow = 0; | |
771 | int pg_oflow = 0, error; | |
772 | void *ptr; | |
773 | ||
774 | nbytes = sizeof(struct gfs2_quota); | |
775 | ||
776 | pg_beg = loc >> PAGE_CACHE_SHIFT; | |
777 | pg_off = loc % PAGE_CACHE_SIZE; | |
778 | ||
779 | /* If the quota straddles a page boundary, split the write in two */ | |
780 | if ((pg_off + nbytes) > PAGE_CACHE_SIZE) { | |
781 | pg_oflow = 1; | |
782 | overflow = (pg_off + nbytes) - PAGE_CACHE_SIZE; | |
783 | } | |
784 | ||
785 | ptr = qp; | |
786 | error = gfs2_write_buf_to_page(ip, pg_beg, pg_off, ptr, | |
787 | nbytes - overflow); | |
788 | /* If there's an overflow, write the remaining bytes to the next page */ | |
789 | if (!error && pg_oflow) | |
790 | error = gfs2_write_buf_to_page(ip, pg_beg + 1, 0, | |
791 | ptr + nbytes - overflow, | |
792 | overflow); | |
793 | return error; | |
794 | } | |
795 | ||
18ec7d5c | 796 | /** |
1e72c0f7 SW |
797 | * gfs2_adjust_quota - adjust record of current block usage |
798 | * @ip: The quota inode | |
799 | * @loc: Offset of the entry in the quota file | |
e285c100 | 800 | * @change: The amount of usage change to record |
1e72c0f7 | 801 | * @qd: The quota data |
e285c100 | 802 | * @fdq: The updated limits to record |
18ec7d5c SW |
803 | * |
804 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
805 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
806 | * |
807 | * Returns: 0 or -ve on error | |
18ec7d5c | 808 | */ |
1e72c0f7 | 809 | |
18ec7d5c | 810 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 | 811 | s64 change, struct gfs2_quota_data *qd, |
14bf61ff | 812 | struct qc_dqblk *fdq) |
18ec7d5c | 813 | { |
feaa7bba | 814 | struct inode *inode = &ip->i_inode; |
14870b45 | 815 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
951b4bd5 | 816 | struct gfs2_quota q; |
39a72580 | 817 | int err; |
e285c100 | 818 | u64 size; |
18ec7d5c | 819 | |
891a8e93 SW |
820 | if (gfs2_is_stuffed(ip)) { |
821 | err = gfs2_unstuff_dinode(ip, NULL); | |
822 | if (err) | |
823 | return err; | |
824 | } | |
7e619bc3 AD |
825 | |
826 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 827 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
828 | if (err < 0) |
829 | return err; | |
830 | ||
39a72580 | 831 | loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */ |
7e619bc3 | 832 | err = -EIO; |
951b4bd5 | 833 | be64_add_cpu(&q.qu_value, change); |
1bdf4535 | 834 | if (((s64)be64_to_cpu(q.qu_value)) < 0) |
39a72580 | 835 | q.qu_value = 0; /* Never go negative on quota usage */ |
951b4bd5 | 836 | qd->qd_qb.qb_value = q.qu_value; |
7e619bc3 | 837 | if (fdq) { |
14bf61ff JK |
838 | if (fdq->d_fieldmask & QC_SPC_SOFT) { |
839 | q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 840 | qd->qd_qb.qb_warn = q.qu_warn; |
7e619bc3 | 841 | } |
14bf61ff JK |
842 | if (fdq->d_fieldmask & QC_SPC_HARD) { |
843 | q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 844 | qd->qd_qb.qb_limit = q.qu_limit; |
7e619bc3 | 845 | } |
14bf61ff JK |
846 | if (fdq->d_fieldmask & QC_SPACE) { |
847 | q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 848 | qd->qd_qb.qb_value = q.qu_value; |
802ec9b6 | 849 | } |
7e619bc3 AD |
850 | } |
851 | ||
39a72580 AD |
852 | err = gfs2_write_disk_quota(ip, &q, loc); |
853 | if (!err) { | |
854 | size = loc + sizeof(struct gfs2_quota); | |
855 | if (size > inode->i_size) | |
856 | i_size_write(inode, size); | |
857 | inode->i_mtime = inode->i_atime = CURRENT_TIME; | |
858 | mark_inode_dirty(inode); | |
859 | set_bit(QDF_REFRESH, &qd->qd_flags); | |
7e619bc3 | 860 | } |
e285c100 | 861 | |
18ec7d5c SW |
862 | return err; |
863 | } | |
864 | ||
b3b94faa DT |
865 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
866 | { | |
15562c43 | 867 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_name.ln_sbd; |
feaa7bba | 868 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 869 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
870 | unsigned int data_blocks, ind_blocks; |
871 | struct gfs2_holder *ghs, i_gh; | |
872 | unsigned int qx, x; | |
873 | struct gfs2_quota_data *qd; | |
71f890f7 | 874 | unsigned reserved; |
f42faf4f | 875 | loff_t offset; |
20b95bf2 | 876 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
877 | int error; |
878 | ||
b54e9a0b | 879 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
880 | if (error) |
881 | return error; | |
882 | ||
b3b94faa DT |
883 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
884 | &data_blocks, &ind_blocks); | |
885 | ||
16c5f06f | 886 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
887 | if (!ghs) |
888 | return -ENOMEM; | |
889 | ||
890 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
5955102c | 891 | inode_lock(&ip->i_inode); |
b3b94faa | 892 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 893 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
894 | GL_NOCACHE, &ghs[qx]); |
895 | if (error) | |
896 | goto out; | |
897 | } | |
898 | ||
899 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
900 | if (error) | |
901 | goto out; | |
902 | ||
903 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 904 | offset = qd2offset(qda[x]); |
461cb419 BP |
905 | if (gfs2_write_alloc_required(ip, offset, |
906 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
907 | nalloc++; |
908 | } | |
909 | ||
20b95bf2 AD |
910 | /* |
911 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
912 | * block to the reservation unconditionally. If the inode | |
913 | * doesn't need unstuffing, the block will be released to the | |
914 | * rgrp since it won't be allocated during the transaction | |
915 | */ | |
7e619bc3 AD |
916 | /* +3 in the end for unstuffing block, inode size update block |
917 | * and another block in case quota straddles page boundary and | |
918 | * two blocks need to be updated instead of 1 */ | |
919 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 920 | |
71f890f7 | 921 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
922 | ap.target = reserved; |
923 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
924 | if (error) |
925 | goto out_alloc; | |
b3b94faa | 926 | |
20b95bf2 | 927 | if (nalloc) |
71f890f7 | 928 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
929 | |
930 | error = gfs2_trans_begin(sdp, blocks, 0); | |
931 | if (error) | |
932 | goto out_ipres; | |
b3b94faa DT |
933 | |
934 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
935 | qd = qda[x]; |
936 | offset = qd2offset(qd); | |
e285c100 | 937 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 938 | if (error) |
b3b94faa | 939 | goto out_end_trans; |
b3b94faa DT |
940 | |
941 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 942 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
943 | } |
944 | ||
945 | error = 0; | |
946 | ||
a91ea69f | 947 | out_end_trans: |
b3b94faa | 948 | gfs2_trans_end(sdp); |
a91ea69f | 949 | out_ipres: |
20b95bf2 | 950 | gfs2_inplace_release(ip); |
a91ea69f | 951 | out_alloc: |
b3b94faa | 952 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 953 | out: |
b3b94faa DT |
954 | while (qx--) |
955 | gfs2_glock_dq_uninit(&ghs[qx]); | |
5955102c | 956 | inode_unlock(&ip->i_inode); |
b3b94faa | 957 | kfree(ghs); |
15562c43 | 958 | gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl, NORMAL_FLUSH); |
b3b94faa DT |
959 | return error; |
960 | } | |
961 | ||
e285c100 SW |
962 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
963 | { | |
964 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
965 | struct gfs2_quota q; | |
966 | struct gfs2_quota_lvb *qlvb; | |
967 | loff_t pos; | |
968 | int error; | |
969 | ||
970 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
971 | pos = qd2offset(qd); | |
4306629e | 972 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
973 | if (error < 0) |
974 | return error; | |
975 | ||
4e2f8849 | 976 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
977 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
978 | qlvb->__pad = 0; | |
979 | qlvb->qb_limit = q.qu_limit; | |
980 | qlvb->qb_warn = q.qu_warn; | |
981 | qlvb->qb_value = q.qu_value; | |
982 | qd->qd_qb = *qlvb; | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
b3b94faa DT |
987 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
988 | struct gfs2_holder *q_gh) | |
989 | { | |
15562c43 | 990 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 991 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 992 | struct gfs2_holder i_gh; |
b3b94faa DT |
993 | int error; |
994 | ||
a91ea69f | 995 | restart: |
b3b94faa DT |
996 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
997 | if (error) | |
998 | return error; | |
999 | ||
30133177 AD |
1000 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
1001 | force_refresh = FORCE; | |
1002 | ||
4e2f8849 | 1003 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 1004 | |
e9fc2aa0 | 1005 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 1006 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
1007 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
1008 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
1009 | if (error) |
1010 | return error; | |
1011 | ||
e9fc2aa0 | 1012 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
1013 | if (error) |
1014 | goto fail; | |
1015 | ||
e285c100 SW |
1016 | error = update_qd(sdp, qd); |
1017 | if (error) | |
1e72c0f7 | 1018 | goto fail_gunlock; |
b3b94faa | 1019 | |
e285c100 | 1020 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
1021 | gfs2_glock_dq_uninit(q_gh); |
1022 | force_refresh = 0; | |
1023 | goto restart; | |
b3b94faa DT |
1024 | } |
1025 | ||
1026 | return 0; | |
1027 | ||
a91ea69f | 1028 | fail_gunlock: |
b3b94faa | 1029 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 1030 | fail: |
b3b94faa | 1031 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
1032 | return error; |
1033 | } | |
1034 | ||
7c06b5d6 | 1035 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1036 | { |
feaa7bba | 1037 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 1038 | struct gfs2_quota_data *qd; |
b58bf407 | 1039 | u32 x; |
b3b94faa DT |
1040 | int error = 0; |
1041 | ||
b3b94faa DT |
1042 | if (capable(CAP_SYS_RESOURCE) || |
1043 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1044 | return 0; | |
1045 | ||
b54e9a0b BP |
1046 | error = gfs2_quota_hold(ip, uid, gid); |
1047 | if (error) | |
1048 | return error; | |
1049 | ||
1050 | sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num, | |
5407e242 | 1051 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
b3b94faa | 1052 | |
b54e9a0b BP |
1053 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1054 | qd = ip->i_qadata->qa_qd[x]; | |
1055 | error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]); | |
b3b94faa DT |
1056 | if (error) |
1057 | break; | |
1058 | } | |
1059 | ||
1060 | if (!error) | |
1061 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
1062 | else { | |
1063 | while (x--) | |
b54e9a0b | 1064 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
b3b94faa DT |
1065 | gfs2_quota_unhold(ip); |
1066 | } | |
1067 | ||
1068 | return error; | |
1069 | } | |
1070 | ||
1071 | static int need_sync(struct gfs2_quota_data *qd) | |
1072 | { | |
15562c43 | 1073 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 1074 | struct gfs2_tune *gt = &sdp->sd_tune; |
cd915493 | 1075 | s64 value; |
b3b94faa DT |
1076 | unsigned int num, den; |
1077 | int do_sync = 1; | |
1078 | ||
1079 | if (!qd->qd_qb.qb_limit) | |
1080 | return 0; | |
1081 | ||
7d80823e | 1082 | spin_lock(&qd_lock); |
b3b94faa | 1083 | value = qd->qd_change; |
7d80823e | 1084 | spin_unlock(&qd_lock); |
b3b94faa DT |
1085 | |
1086 | spin_lock(>->gt_spin); | |
1087 | num = gt->gt_quota_scale_num; | |
1088 | den = gt->gt_quota_scale_den; | |
1089 | spin_unlock(>->gt_spin); | |
1090 | ||
1091 | if (value < 0) | |
1092 | do_sync = 0; | |
e9fc2aa0 SW |
1093 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1094 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1095 | do_sync = 0; |
1096 | else { | |
1097 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1098 | value = div_s64(value, den); |
e9fc2aa0 | 1099 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1100 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1101 | do_sync = 0; |
1102 | } | |
1103 | ||
1104 | return do_sync; | |
1105 | } | |
1106 | ||
1107 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1108 | { | |
aabd7c72 | 1109 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1110 | struct gfs2_quota_data *qda[4]; |
1111 | unsigned int count = 0; | |
b58bf407 | 1112 | u32 x; |
aabd7c72 | 1113 | int found; |
b3b94faa DT |
1114 | |
1115 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1116 | goto out; | |
1117 | ||
b54e9a0b | 1118 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
b3b94faa DT |
1119 | struct gfs2_quota_data *qd; |
1120 | int sync; | |
1121 | ||
b54e9a0b | 1122 | qd = ip->i_qadata->qa_qd[x]; |
b3b94faa DT |
1123 | sync = need_sync(qd); |
1124 | ||
b54e9a0b | 1125 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
aabd7c72 SW |
1126 | if (!sync) |
1127 | continue; | |
1128 | ||
7d80823e | 1129 | spin_lock(&qd_lock); |
aabd7c72 | 1130 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1131 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1132 | |
1133 | if (!found) | |
1134 | continue; | |
1135 | ||
1136 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1137 | if (bh_get(qd)) { | |
1138 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1139 | slot_put(qd); | |
1140 | qd_put(qd); | |
1141 | continue; | |
1142 | } | |
b3b94faa | 1143 | |
aabd7c72 | 1144 | qda[count++] = qd; |
b3b94faa DT |
1145 | } |
1146 | ||
1147 | if (count) { | |
1148 | do_sync(count, qda); | |
1149 | for (x = 0; x < count; x++) | |
1150 | qd_unlock(qda[x]); | |
1151 | } | |
1152 | ||
a91ea69f | 1153 | out: |
b3b94faa DT |
1154 | gfs2_quota_unhold(ip); |
1155 | } | |
1156 | ||
1157 | #define MAX_LINE 256 | |
1158 | ||
1159 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1160 | { | |
15562c43 | 1161 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 1162 | |
8382e26b JP |
1163 | fs_info(sdp, "quota %s for %s %u\n", |
1164 | type, | |
d77d1b58 JP |
1165 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1166 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1167 | |
1168 | return 0; | |
1169 | } | |
1170 | ||
25435e5e AD |
1171 | /** |
1172 | * gfs2_quota_check - check if allocating new blocks will exceed quota | |
1173 | * @ip: The inode for which this check is being performed | |
1174 | * @uid: The uid to check against | |
1175 | * @gid: The gid to check against | |
1176 | * @ap: The allocation parameters. ap->target contains the requested | |
1177 | * blocks. ap->min_target, if set, contains the minimum blks | |
1178 | * requested. | |
1179 | * | |
1180 | * Returns: 0 on success. | |
1181 | * min_req = ap->min_target ? ap->min_target : ap->target; | |
1182 | * quota must allow atleast min_req blks for success and | |
1183 | * ap->allowed is set to the number of blocks allowed | |
1184 | * | |
1185 | * -EDQUOT otherwise, quota violation. ap->allowed is set to number | |
1186 | * of blocks available. | |
1187 | */ | |
b8fbf471 AD |
1188 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, |
1189 | struct gfs2_alloc_parms *ap) | |
b3b94faa | 1190 | { |
feaa7bba | 1191 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1192 | struct gfs2_quota_data *qd; |
25435e5e | 1193 | s64 value, warn, limit; |
b58bf407 | 1194 | u32 x; |
b3b94faa DT |
1195 | int error = 0; |
1196 | ||
25435e5e | 1197 | ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ |
b3b94faa DT |
1198 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
1199 | return 0; | |
1200 | ||
1201 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1202 | return 0; | |
1203 | ||
b54e9a0b BP |
1204 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1205 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1206 | |
05e0a60d EB |
1207 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1208 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1209 | continue; |
1210 | ||
25435e5e AD |
1211 | warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn); |
1212 | limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit); | |
e9fc2aa0 | 1213 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1214 | spin_lock(&qd_lock); |
25435e5e | 1215 | value += qd->qd_change; |
7d80823e | 1216 | spin_unlock(&qd_lock); |
b3b94faa | 1217 | |
25435e5e AD |
1218 | if (limit > 0 && (limit - value) < ap->allowed) |
1219 | ap->allowed = limit - value; | |
1220 | /* If we can't meet the target */ | |
1221 | if (limit && limit < (value + (s64)ap->target)) { | |
1222 | /* If no min_target specified or we don't meet | |
1223 | * min_target, return -EDQUOT */ | |
1224 | if (!ap->min_target || ap->min_target > ap->allowed) { | |
9cde2898 AD |
1225 | if (!test_and_set_bit(QDF_QMSG_QUIET, |
1226 | &qd->qd_flags)) { | |
1227 | print_message(qd, "exceeded"); | |
1228 | quota_send_warning(qd->qd_id, | |
1229 | sdp->sd_vfs->s_dev, | |
1230 | QUOTA_NL_BHARDWARN); | |
1231 | } | |
25435e5e AD |
1232 | error = -EDQUOT; |
1233 | break; | |
1234 | } | |
1235 | } else if (warn && warn < value && | |
b3b94faa | 1236 | time_after_eq(jiffies, qd->qd_last_warn + |
25435e5e AD |
1237 | gfs2_tune_get(sdp, gt_quota_warn_period) |
1238 | * HZ)) { | |
05e0a60d | 1239 | quota_send_warning(qd->qd_id, |
2ec46505 | 1240 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1241 | error = print_message(qd, "warning"); |
1242 | qd->qd_last_warn = jiffies; | |
1243 | } | |
1244 | } | |
b3b94faa DT |
1245 | return error; |
1246 | } | |
1247 | ||
cd915493 | 1248 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1249 | kuid_t uid, kgid_t gid) |
b3b94faa | 1250 | { |
b3b94faa | 1251 | struct gfs2_quota_data *qd; |
b58bf407 | 1252 | u32 x; |
b54e9a0b | 1253 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1254 | |
b54e9a0b BP |
1255 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON || |
1256 | gfs2_assert_warn(sdp, change)) | |
b3b94faa | 1257 | return; |
383f01fb | 1258 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1259 | return; |
1260 | ||
b54e9a0b BP |
1261 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1262 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1263 | |
05e0a60d EB |
1264 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1265 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1266 | do_qc(qd, change); |
b3b94faa DT |
1267 | } |
1268 | } | |
1269 | } | |
1270 | ||
ceed1723 | 1271 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1272 | { |
8c42d637 | 1273 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1274 | struct gfs2_quota_data **qda; |
bef292a7 | 1275 | unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder); |
b3b94faa DT |
1276 | unsigned int num_qd; |
1277 | unsigned int x; | |
1278 | int error = 0; | |
1279 | ||
b3b94faa DT |
1280 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1281 | if (!qda) | |
1282 | return -ENOMEM; | |
1283 | ||
e46c772d SW |
1284 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1285 | sdp->sd_quota_sync_gen++; | |
1286 | ||
b3b94faa DT |
1287 | do { |
1288 | num_qd = 0; | |
1289 | ||
1290 | for (;;) { | |
1291 | error = qd_fish(sdp, qda + num_qd); | |
1292 | if (error || !qda[num_qd]) | |
1293 | break; | |
1294 | if (++num_qd == max_qd) | |
1295 | break; | |
1296 | } | |
1297 | ||
1298 | if (num_qd) { | |
1299 | if (!error) | |
1300 | error = do_sync(num_qd, qda); | |
1301 | if (!error) | |
1302 | for (x = 0; x < num_qd; x++) | |
1303 | qda[x]->qd_sync_gen = | |
1304 | sdp->sd_quota_sync_gen; | |
1305 | ||
1306 | for (x = 0; x < num_qd; x++) | |
1307 | qd_unlock(qda[x]); | |
1308 | } | |
1309 | } while (!error && num_qd == max_qd); | |
1310 | ||
e46c772d | 1311 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1312 | kfree(qda); |
1313 | ||
1314 | return error; | |
1315 | } | |
1316 | ||
ed87dabc | 1317 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1318 | { |
1319 | struct gfs2_quota_data *qd; | |
1320 | struct gfs2_holder q_gh; | |
1321 | int error; | |
1322 | ||
05e0a60d | 1323 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1324 | if (error) |
1325 | return error; | |
1326 | ||
1327 | error = do_glock(qd, FORCE, &q_gh); | |
1328 | if (!error) | |
1329 | gfs2_glock_dq_uninit(&q_gh); | |
1330 | ||
1331 | qd_put(qd); | |
b3b94faa DT |
1332 | return error; |
1333 | } | |
1334 | ||
b3b94faa DT |
1335 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1336 | { | |
feaa7bba | 1337 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1338 | u64 size = i_size_read(sdp->sd_qc_inode); |
1339 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1340 | unsigned int x, slot = 0; |
1341 | unsigned int found = 0; | |
c754fbbb | 1342 | unsigned int hash; |
ee2411a8 | 1343 | unsigned int bm_size; |
cd915493 SW |
1344 | u64 dblock; |
1345 | u32 extlen = 0; | |
b3b94faa DT |
1346 | int error; |
1347 | ||
a2e0f799 | 1348 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1349 | return -EIO; |
a2e0f799 | 1350 | |
b3b94faa | 1351 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1352 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1353 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1354 | error = -ENOMEM; |
fcf10d38 | 1355 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1356 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 FF |
1357 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
1358 | __GFP_ZERO, PAGE_KERNEL); | |
b3b94faa DT |
1359 | if (!sdp->sd_quota_bitmap) |
1360 | return error; | |
1361 | ||
b3b94faa DT |
1362 | for (x = 0; x < blocks; x++) { |
1363 | struct buffer_head *bh; | |
7aed98fb | 1364 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1365 | unsigned int y; |
1366 | ||
1367 | if (!extlen) { | |
1368 | int new = 0; | |
feaa7bba | 1369 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1370 | if (error) |
1371 | goto fail; | |
1372 | } | |
b3b94faa | 1373 | error = -EIO; |
7276b3b0 SW |
1374 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1375 | if (!bh) | |
1376 | goto fail; | |
b3b94faa DT |
1377 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1378 | brelse(bh); | |
1379 | goto fail; | |
1380 | } | |
1381 | ||
7aed98fb | 1382 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1383 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1384 | y++, slot++) { |
b3b94faa | 1385 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1386 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1387 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1388 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1389 | USRQUOTA : GRPQUOTA; | |
1390 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1391 | be32_to_cpu(qc->qc_id)); | |
1392 | qc++; | |
1393 | if (!qc_change) | |
b3b94faa DT |
1394 | continue; |
1395 | ||
c754fbbb SW |
1396 | hash = gfs2_qd_hash(sdp, qc_id); |
1397 | qd = qd_alloc(hash, sdp, qc_id); | |
1398 | if (qd == NULL) { | |
b3b94faa DT |
1399 | brelse(bh); |
1400 | goto fail; | |
1401 | } | |
1402 | ||
1403 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1404 | qd->qd_change = qc_change; |
b3b94faa DT |
1405 | qd->qd_slot = slot; |
1406 | qd->qd_slot_count = 1; | |
b3b94faa | 1407 | |
7d80823e | 1408 | spin_lock(&qd_lock); |
ee2411a8 | 1409 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1410 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1411 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1412 | spin_unlock(&qd_lock); |
b3b94faa | 1413 | |
c754fbbb SW |
1414 | spin_lock_bucket(hash); |
1415 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1416 | spin_unlock_bucket(hash); | |
1417 | ||
b3b94faa DT |
1418 | found++; |
1419 | } | |
1420 | ||
1421 | brelse(bh); | |
1422 | dblock++; | |
1423 | extlen--; | |
1424 | } | |
1425 | ||
1426 | if (found) | |
1427 | fs_info(sdp, "found %u quota changes\n", found); | |
1428 | ||
1429 | return 0; | |
1430 | ||
a91ea69f | 1431 | fail: |
b3b94faa DT |
1432 | gfs2_quota_cleanup(sdp); |
1433 | return error; | |
1434 | } | |
1435 | ||
b3b94faa DT |
1436 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1437 | { | |
1438 | struct list_head *head = &sdp->sd_quota_list; | |
1439 | struct gfs2_quota_data *qd; | |
b3b94faa | 1440 | |
7d80823e | 1441 | spin_lock(&qd_lock); |
b3b94faa DT |
1442 | while (!list_empty(head)) { |
1443 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1444 | ||
b3b94faa | 1445 | list_del(&qd->qd_list); |
c754fbbb | 1446 | |
0a7ab79c | 1447 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1448 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1449 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1450 | spin_unlock(&qd_lock); |
b3b94faa | 1451 | |
c754fbbb SW |
1452 | spin_lock_bucket(qd->qd_hash); |
1453 | hlist_bl_del_rcu(&qd->qd_hlist); | |
1454 | spin_unlock_bucket(qd->qd_hash); | |
1455 | ||
8ad151c2 SW |
1456 | gfs2_assert_warn(sdp, !qd->qd_change); |
1457 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
b3b94faa DT |
1458 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
1459 | ||
f057f6cd | 1460 | gfs2_glock_put(qd->qd_gl); |
c754fbbb | 1461 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
b3b94faa | 1462 | |
7d80823e | 1463 | spin_lock(&qd_lock); |
b3b94faa | 1464 | } |
7d80823e | 1465 | spin_unlock(&qd_lock); |
b3b94faa DT |
1466 | |
1467 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1468 | ||
3cdcf63e AV |
1469 | kvfree(sdp->sd_quota_bitmap); |
1470 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1471 | } |
1472 | ||
37b2c837 SW |
1473 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1474 | { | |
1475 | if (error == 0 || error == -EROFS) | |
1476 | return; | |
1477 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1478 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1479 | } | |
1480 | ||
1481 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1482 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1483 | unsigned long t, unsigned long *timeo, |
1484 | unsigned int *new_timeo) | |
1485 | { | |
1486 | if (t >= *timeo) { | |
8c42d637 | 1487 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1488 | quotad_error(sdp, msg, error); |
1489 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1490 | } else { | |
1491 | *timeo -= t; | |
1492 | } | |
1493 | } | |
1494 | ||
813e0c46 SW |
1495 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1496 | { | |
1497 | struct gfs2_inode *ip; | |
1498 | ||
1499 | while(1) { | |
1500 | ip = NULL; | |
1501 | spin_lock(&sdp->sd_trunc_lock); | |
1502 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1503 | ip = list_entry(sdp->sd_trunc_list.next, | |
1504 | struct gfs2_inode, i_trunc_list); | |
1505 | list_del_init(&ip->i_trunc_list); | |
1506 | } | |
1507 | spin_unlock(&sdp->sd_trunc_lock); | |
1508 | if (ip == NULL) | |
1509 | return; | |
1510 | gfs2_glock_finish_truncate(ip); | |
1511 | } | |
1512 | } | |
1513 | ||
3d3c10f2 BM |
1514 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1515 | if (!sdp->sd_statfs_force_sync) { | |
1516 | sdp->sd_statfs_force_sync = 1; | |
1517 | wake_up(&sdp->sd_quota_wait); | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | ||
37b2c837 SW |
1522 | /** |
1523 | * gfs2_quotad - Write cached quota changes into the quota file | |
1524 | * @sdp: Pointer to GFS2 superblock | |
1525 | * | |
1526 | */ | |
1527 | ||
1528 | int gfs2_quotad(void *data) | |
1529 | { | |
1530 | struct gfs2_sbd *sdp = data; | |
1531 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1532 | unsigned long statfs_timeo = 0; | |
1533 | unsigned long quotad_timeo = 0; | |
1534 | unsigned long t = 0; | |
1535 | DEFINE_WAIT(wait); | |
813e0c46 | 1536 | int empty; |
37b2c837 SW |
1537 | |
1538 | while (!kthread_should_stop()) { | |
1539 | ||
1540 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1541 | if (sdp->sd_statfs_force_sync) { |
1542 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1543 | quotad_error(sdp, "statfs", error); | |
1544 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1545 | } | |
1546 | else | |
1547 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1548 | &statfs_timeo, | |
1549 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1550 | |
1551 | /* Update quota file */ | |
edd2e9ac | 1552 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1553 | "ad_timeo, &tune->gt_quota_quantum); |
1554 | ||
813e0c46 SW |
1555 | /* Check for & recover partially truncated inodes */ |
1556 | quotad_check_trunc_list(sdp); | |
1557 | ||
a0acae0e TH |
1558 | try_to_freeze(); |
1559 | ||
37b2c837 SW |
1560 | t = min(quotad_timeo, statfs_timeo); |
1561 | ||
7fa5d20d | 1562 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1563 | spin_lock(&sdp->sd_trunc_lock); |
1564 | empty = list_empty(&sdp->sd_trunc_list); | |
1565 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1566 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1567 | t -= schedule_timeout(t); |
1568 | else | |
1569 | t = 0; | |
37b2c837 SW |
1570 | finish_wait(&sdp->sd_quota_wait, &wait); |
1571 | } | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
e54b2e2d | 1576 | static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state) |
1d371b5e SW |
1577 | { |
1578 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1579 | ||
e54b2e2d | 1580 | memset(state, 0, sizeof(*state)); |
ad6bb90f CH |
1581 | |
1582 | switch (sdp->sd_args.ar_quota) { | |
1583 | case GFS2_QUOTA_ON: | |
e54b2e2d JK |
1584 | state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; |
1585 | state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; | |
ad6bb90f CH |
1586 | /*FALLTHRU*/ |
1587 | case GFS2_QUOTA_ACCOUNT: | |
e54b2e2d JK |
1588 | state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED | |
1589 | QCI_SYSFILE; | |
1590 | state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED | | |
1591 | QCI_SYSFILE; | |
ad6bb90f CH |
1592 | break; |
1593 | case GFS2_QUOTA_OFF: | |
1594 | break; | |
1595 | } | |
1d371b5e | 1596 | if (sdp->sd_quota_inode) { |
e54b2e2d JK |
1597 | state->s_state[USRQUOTA].ino = |
1598 | GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1599 | state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks; | |
1d371b5e | 1600 | } |
e54b2e2d JK |
1601 | state->s_state[USRQUOTA].nextents = 1; /* unsupported */ |
1602 | state->s_state[GRPQUOTA] = state->s_state[USRQUOTA]; | |
1603 | state->s_incoredqs = list_lru_count(&gfs2_qd_lru); | |
1d371b5e SW |
1604 | return 0; |
1605 | } | |
1606 | ||
74a8a103 | 1607 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1608 | struct qc_dqblk *fdq) |
113d6b3c SW |
1609 | { |
1610 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1611 | struct gfs2_quota_lvb *qlvb; | |
1612 | struct gfs2_quota_data *qd; | |
1613 | struct gfs2_holder q_gh; | |
1614 | int error; | |
1615 | ||
14bf61ff | 1616 | memset(fdq, 0, sizeof(*fdq)); |
113d6b3c SW |
1617 | |
1618 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1619 | return -ESRCH; /* Crazy XFS error code */ | |
1620 | ||
236c64e4 EB |
1621 | if ((qid.type != USRQUOTA) && |
1622 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1623 | return -EINVAL; |
1624 | ||
05e0a60d | 1625 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1626 | if (error) |
1627 | return error; | |
1628 | error = do_glock(qd, FORCE, &q_gh); | |
1629 | if (error) | |
1630 | goto out; | |
1631 | ||
4e2f8849 | 1632 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
14bf61ff JK |
1633 | fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift; |
1634 | fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift; | |
1635 | fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift; | |
113d6b3c SW |
1636 | |
1637 | gfs2_glock_dq_uninit(&q_gh); | |
1638 | out: | |
1639 | qd_put(qd); | |
1640 | return error; | |
1641 | } | |
1642 | ||
e285c100 | 1643 | /* GFS2 only supports a subset of the XFS fields */ |
14bf61ff | 1644 | #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE) |
e285c100 | 1645 | |
74a8a103 | 1646 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1647 | struct qc_dqblk *fdq) |
e285c100 SW |
1648 | { |
1649 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1650 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1651 | struct gfs2_quota_data *qd; | |
1652 | struct gfs2_holder q_gh, i_gh; | |
1653 | unsigned int data_blocks, ind_blocks; | |
1654 | unsigned int blocks = 0; | |
1655 | int alloc_required; | |
e285c100 SW |
1656 | loff_t offset; |
1657 | int error; | |
1658 | ||
1659 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1660 | return -ESRCH; /* Crazy XFS error code */ | |
1661 | ||
236c64e4 EB |
1662 | if ((qid.type != USRQUOTA) && |
1663 | (qid.type != GRPQUOTA)) | |
e285c100 | 1664 | return -EINVAL; |
e285c100 SW |
1665 | |
1666 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1667 | return -EINVAL; | |
e285c100 | 1668 | |
05e0a60d | 1669 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1670 | if (error) |
1671 | return error; | |
1672 | ||
b54e9a0b | 1673 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
1674 | if (error) |
1675 | goto out_put; | |
1676 | ||
5955102c | 1677 | inode_lock(&ip->i_inode); |
e285c100 SW |
1678 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); |
1679 | if (error) | |
0a305e49 | 1680 | goto out_unlockput; |
e285c100 SW |
1681 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1682 | if (error) | |
1683 | goto out_q; | |
1684 | ||
1685 | /* Check for existing entry, if none then alloc new blocks */ | |
1686 | error = update_qd(sdp, qd); | |
1687 | if (error) | |
1688 | goto out_i; | |
1689 | ||
1690 | /* If nothing has changed, this is a no-op */ | |
14bf61ff JK |
1691 | if ((fdq->d_fieldmask & QC_SPC_SOFT) && |
1692 | ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) | |
1693 | fdq->d_fieldmask ^= QC_SPC_SOFT; | |
802ec9b6 | 1694 | |
14bf61ff JK |
1695 | if ((fdq->d_fieldmask & QC_SPC_HARD) && |
1696 | ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) | |
1697 | fdq->d_fieldmask ^= QC_SPC_HARD; | |
802ec9b6 | 1698 | |
14bf61ff JK |
1699 | if ((fdq->d_fieldmask & QC_SPACE) && |
1700 | ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1701 | fdq->d_fieldmask ^= QC_SPACE; | |
802ec9b6 | 1702 | |
e285c100 SW |
1703 | if (fdq->d_fieldmask == 0) |
1704 | goto out_i; | |
1705 | ||
1706 | offset = qd2offset(qd); | |
461cb419 | 1707 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1708 | if (gfs2_is_stuffed(ip)) |
1709 | alloc_required = 1; | |
e285c100 | 1710 | if (alloc_required) { |
7b9cff46 | 1711 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1712 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1713 | &data_blocks, &ind_blocks); | |
564e12b1 | 1714 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1715 | ap.target = blocks; |
1716 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1717 | if (error) |
564e12b1 | 1718 | goto out_i; |
71f890f7 | 1719 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1720 | } |
1721 | ||
e79a46a0 AD |
1722 | /* Some quotas span block boundaries and can update two blocks, |
1723 | adding an extra block to the transaction to handle such quotas */ | |
1724 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1725 | if (error) |
1726 | goto out_release; | |
1727 | ||
1728 | /* Apply changes */ | |
1729 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
9cde2898 AD |
1730 | if (!error) |
1731 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
e285c100 SW |
1732 | |
1733 | gfs2_trans_end(sdp); | |
1734 | out_release: | |
564e12b1 | 1735 | if (alloc_required) |
e285c100 | 1736 | gfs2_inplace_release(ip); |
e285c100 SW |
1737 | out_i: |
1738 | gfs2_glock_dq_uninit(&i_gh); | |
1739 | out_q: | |
1740 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1741 | out_unlockput: |
5955102c | 1742 | inode_unlock(&ip->i_inode); |
0a305e49 | 1743 | out_put: |
e285c100 SW |
1744 | qd_put(qd); |
1745 | return error; | |
1746 | } | |
1747 | ||
cc632e7f SW |
1748 | const struct quotactl_ops gfs2_quotactl_ops = { |
1749 | .quota_sync = gfs2_quota_sync, | |
e54b2e2d | 1750 | .get_state = gfs2_quota_get_state, |
b9b2dd36 | 1751 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1752 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1753 | }; |
c754fbbb SW |
1754 | |
1755 | void __init gfs2_quota_hash_init(void) | |
1756 | { | |
1757 | unsigned i; | |
1758 | ||
1759 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1760 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1761 | } |