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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 | ||
78 | /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */ | |
2d9e7230 | 79 | /* -> sd_bitmap_lock */ |
7d80823e | 80 | static DEFINE_SPINLOCK(qd_lock); |
2147dbfd | 81 | struct list_lru gfs2_qd_lru; |
0a7ab79c | 82 | |
c754fbbb SW |
83 | static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE]; |
84 | ||
85 | static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp, | |
86 | const struct kqid qid) | |
87 | { | |
88 | unsigned int h; | |
89 | ||
90 | h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0); | |
91 | h = jhash(&qid, sizeof(struct kqid), h); | |
92 | ||
93 | return h & GFS2_QD_HASH_MASK; | |
94 | } | |
95 | ||
96 | static inline void spin_lock_bucket(unsigned int hash) | |
97 | { | |
98 | hlist_bl_lock(&qd_hash_table[hash]); | |
99 | } | |
100 | ||
101 | static inline void spin_unlock_bucket(unsigned int hash) | |
102 | { | |
103 | hlist_bl_unlock(&qd_hash_table[hash]); | |
104 | } | |
105 | ||
106 | static void gfs2_qd_dealloc(struct rcu_head *rcu) | |
107 | { | |
108 | struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu); | |
109 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
110 | } | |
111 | ||
2147dbfd | 112 | static void gfs2_qd_dispose(struct list_head *list) |
0a7ab79c AD |
113 | { |
114 | struct gfs2_quota_data *qd; | |
115 | struct gfs2_sbd *sdp; | |
0a7ab79c | 116 | |
2147dbfd SW |
117 | while (!list_empty(list)) { |
118 | qd = list_entry(list->next, struct gfs2_quota_data, qd_lru); | |
15562c43 | 119 | sdp = qd->qd_gl->gl_name.ln_sbd; |
0a7ab79c | 120 | |
2147dbfd SW |
121 | list_del(&qd->qd_lru); |
122 | ||
0a7ab79c | 123 | /* Free from the filesystem-specific list */ |
2147dbfd | 124 | spin_lock(&qd_lock); |
0a7ab79c | 125 | list_del(&qd->qd_list); |
2147dbfd | 126 | spin_unlock(&qd_lock); |
0a7ab79c | 127 | |
c754fbbb SW |
128 | spin_lock_bucket(qd->qd_hash); |
129 | hlist_bl_del_rcu(&qd->qd_hlist); | |
130 | spin_unlock_bucket(qd->qd_hash); | |
131 | ||
0a7ab79c AD |
132 | gfs2_assert_warn(sdp, !qd->qd_change); |
133 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
134 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
135 | ||
f057f6cd | 136 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
137 | atomic_dec(&sdp->sd_quota_count); |
138 | ||
139 | /* Delete it from the common reclaim list */ | |
c754fbbb | 140 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
0a7ab79c | 141 | } |
2147dbfd SW |
142 | } |
143 | ||
144 | ||
3f97b163 VD |
145 | static enum lru_status gfs2_qd_isolate(struct list_head *item, |
146 | struct list_lru_one *lru, spinlock_t *lru_lock, void *arg) | |
2147dbfd SW |
147 | { |
148 | struct list_head *dispose = arg; | |
149 | struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru); | |
150 | ||
151 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
152 | return LRU_SKIP; | |
153 | ||
154 | if (qd->qd_lockref.count == 0) { | |
155 | lockref_mark_dead(&qd->qd_lockref); | |
3f97b163 | 156 | list_lru_isolate_move(lru, &qd->qd_lru, dispose); |
2147dbfd SW |
157 | } |
158 | ||
159 | spin_unlock(&qd->qd_lockref.lock); | |
160 | return LRU_REMOVED; | |
161 | } | |
162 | ||
163 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
164 | struct shrink_control *sc) | |
165 | { | |
166 | LIST_HEAD(dispose); | |
167 | unsigned long freed; | |
168 | ||
169 | if (!(sc->gfp_mask & __GFP_FS)) | |
170 | return SHRINK_STOP; | |
171 | ||
503c358c VD |
172 | freed = list_lru_shrink_walk(&gfs2_qd_lru, sc, |
173 | gfs2_qd_isolate, &dispose); | |
2147dbfd SW |
174 | |
175 | gfs2_qd_dispose(&dispose); | |
176 | ||
1ab6c499 DC |
177 | return freed; |
178 | } | |
0a7ab79c | 179 | |
2147dbfd SW |
180 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
181 | struct shrink_control *sc) | |
1ab6c499 | 182 | { |
503c358c | 183 | return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); |
0a7ab79c AD |
184 | } |
185 | ||
2147dbfd SW |
186 | struct shrinker gfs2_qd_shrinker = { |
187 | .count_objects = gfs2_qd_shrink_count, | |
188 | .scan_objects = gfs2_qd_shrink_scan, | |
189 | .seeks = DEFAULT_SEEKS, | |
190 | .flags = SHRINKER_NUMA_AWARE, | |
191 | }; | |
192 | ||
193 | ||
2f6c9896 EB |
194 | static u64 qd2index(struct gfs2_quota_data *qd) |
195 | { | |
05e0a60d EB |
196 | struct kqid qid = qd->qd_id; |
197 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 198 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
199 | } |
200 | ||
cd915493 | 201 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 202 | { |
cd915493 | 203 | u64 offset; |
b3b94faa | 204 | |
2f6c9896 | 205 | offset = qd2index(qd); |
b3b94faa DT |
206 | offset *= sizeof(struct gfs2_quota); |
207 | ||
208 | return offset; | |
209 | } | |
210 | ||
c754fbbb | 211 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
212 | { |
213 | struct gfs2_quota_data *qd; | |
214 | int error; | |
215 | ||
37b2c837 | 216 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 217 | if (!qd) |
c754fbbb | 218 | return NULL; |
b3b94faa | 219 | |
c754fbbb | 220 | qd->qd_sbd = sdp; |
9b9f039d SW |
221 | qd->qd_lockref.count = 1; |
222 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 223 | qd->qd_id = qid; |
b3b94faa | 224 | qd->qd_slot = -1; |
2147dbfd | 225 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 226 | qd->qd_hash = hash; |
b3b94faa | 227 | |
2f6c9896 | 228 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
229 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
230 | if (error) | |
231 | goto fail; | |
232 | ||
c754fbbb | 233 | return qd; |
b3b94faa | 234 | |
a91ea69f | 235 | fail: |
37b2c837 | 236 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 237 | return NULL; |
b3b94faa DT |
238 | } |
239 | ||
c754fbbb SW |
240 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
241 | const struct gfs2_sbd *sdp, | |
242 | struct kqid qid) | |
b3b94faa | 243 | { |
c754fbbb SW |
244 | struct gfs2_quota_data *qd; |
245 | struct hlist_bl_node *h; | |
b3b94faa | 246 | |
c754fbbb SW |
247 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
248 | if (!qid_eq(qd->qd_id, qid)) | |
249 | continue; | |
250 | if (qd->qd_sbd != sdp) | |
251 | continue; | |
252 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
253 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
254 | return qd; | |
b3b94faa | 255 | } |
c754fbbb | 256 | } |
b3b94faa | 257 | |
c754fbbb SW |
258 | return NULL; |
259 | } | |
b3b94faa | 260 | |
b3b94faa | 261 | |
c754fbbb SW |
262 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
263 | struct gfs2_quota_data **qdp) | |
264 | { | |
265 | struct gfs2_quota_data *qd, *new_qd; | |
266 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 267 | |
c754fbbb SW |
268 | rcu_read_lock(); |
269 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
270 | rcu_read_unlock(); | |
b3b94faa | 271 | |
c754fbbb SW |
272 | if (qd) |
273 | return 0; | |
274 | ||
275 | new_qd = qd_alloc(hash, sdp, qid); | |
276 | if (!new_qd) | |
277 | return -ENOMEM; | |
278 | ||
279 | spin_lock(&qd_lock); | |
280 | spin_lock_bucket(hash); | |
281 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
282 | if (qd == NULL) { | |
283 | *qdp = new_qd; | |
284 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
285 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
286 | atomic_inc(&sdp->sd_quota_count); | |
287 | } | |
288 | spin_unlock_bucket(hash); | |
289 | spin_unlock(&qd_lock); | |
290 | ||
291 | if (qd) { | |
292 | gfs2_glock_put(new_qd->qd_gl); | |
293 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 294 | } |
c754fbbb SW |
295 | |
296 | return 0; | |
b3b94faa DT |
297 | } |
298 | ||
c754fbbb | 299 | |
b3b94faa DT |
300 | static void qd_hold(struct gfs2_quota_data *qd) |
301 | { | |
15562c43 | 302 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
9b9f039d SW |
303 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
304 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
305 | } |
306 | ||
307 | static void qd_put(struct gfs2_quota_data *qd) | |
308 | { | |
2147dbfd SW |
309 | if (lockref_put_or_lock(&qd->qd_lockref)) |
310 | return; | |
9b9f039d | 311 | |
2147dbfd SW |
312 | qd->qd_lockref.count = 0; |
313 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
314 | spin_unlock(&qd->qd_lockref.lock); | |
9b9f039d | 315 | |
b3b94faa DT |
316 | } |
317 | ||
318 | static int slot_get(struct gfs2_quota_data *qd) | |
319 | { | |
ee2411a8 SW |
320 | struct gfs2_sbd *sdp = qd->qd_sbd; |
321 | unsigned int bit; | |
322 | int error = 0; | |
b3b94faa | 323 | |
2d9e7230 | 324 | spin_lock(&sdp->sd_bitmap_lock); |
ee2411a8 SW |
325 | if (qd->qd_slot_count != 0) |
326 | goto out; | |
b3b94faa | 327 | |
ee2411a8 SW |
328 | error = -ENOSPC; |
329 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots); | |
330 | if (bit < sdp->sd_quota_slots) { | |
331 | set_bit(bit, sdp->sd_quota_bitmap); | |
332 | qd->qd_slot = bit; | |
e9fb7c73 | 333 | error = 0; |
ee2411a8 SW |
334 | out: |
335 | qd->qd_slot_count++; | |
b3b94faa | 336 | } |
2d9e7230 | 337 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa | 338 | |
ee2411a8 | 339 | return error; |
b3b94faa DT |
340 | } |
341 | ||
342 | static void slot_hold(struct gfs2_quota_data *qd) | |
343 | { | |
ee2411a8 | 344 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 345 | |
2d9e7230 | 346 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
347 | gfs2_assert(sdp, qd->qd_slot_count); |
348 | qd->qd_slot_count++; | |
2d9e7230 | 349 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
350 | } |
351 | ||
352 | static void slot_put(struct gfs2_quota_data *qd) | |
353 | { | |
ee2411a8 | 354 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 355 | |
2d9e7230 | 356 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
357 | gfs2_assert(sdp, qd->qd_slot_count); |
358 | if (!--qd->qd_slot_count) { | |
ee2411a8 | 359 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
360 | qd->qd_slot = -1; |
361 | } | |
2d9e7230 | 362 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
363 | } |
364 | ||
365 | static int bh_get(struct gfs2_quota_data *qd) | |
366 | { | |
15562c43 | 367 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 368 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 369 | unsigned int block, offset; |
b3b94faa DT |
370 | struct buffer_head *bh; |
371 | int error; | |
23591256 | 372 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 373 | |
f55ab26a | 374 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
375 | |
376 | if (qd->qd_bh_count++) { | |
f55ab26a | 377 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
378 | return 0; |
379 | } | |
380 | ||
381 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 382 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 383 | |
47a9a527 | 384 | bh_map.b_size = BIT(ip->i_inode.i_blkbits); |
e9e1ef2b | 385 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
386 | if (error) |
387 | goto fail; | |
c8d57703 | 388 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, 0, &bh); |
b3b94faa DT |
389 | if (error) |
390 | goto fail; | |
391 | error = -EIO; | |
392 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
393 | goto fail_brelse; | |
394 | ||
395 | qd->qd_bh = bh; | |
396 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
397 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
398 | offset * sizeof(struct gfs2_quota_change)); | |
399 | ||
2e95b665 | 400 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
401 | |
402 | return 0; | |
403 | ||
a91ea69f | 404 | fail_brelse: |
b3b94faa | 405 | brelse(bh); |
a91ea69f | 406 | fail: |
b3b94faa | 407 | qd->qd_bh_count--; |
f55ab26a | 408 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
409 | return error; |
410 | } | |
411 | ||
412 | static void bh_put(struct gfs2_quota_data *qd) | |
413 | { | |
15562c43 | 414 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 415 | |
f55ab26a | 416 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
417 | gfs2_assert(sdp, qd->qd_bh_count); |
418 | if (!--qd->qd_bh_count) { | |
419 | brelse(qd->qd_bh); | |
420 | qd->qd_bh = NULL; | |
421 | qd->qd_bh_qc = NULL; | |
422 | } | |
f55ab26a | 423 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
424 | } |
425 | ||
1bf59bf6 SW |
426 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
427 | u64 *sync_gen) | |
428 | { | |
429 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
430 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
431 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
432 | return 0; | |
433 | ||
2147dbfd SW |
434 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
435 | return 0; | |
1bf59bf6 | 436 | |
2147dbfd | 437 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 438 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 439 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 440 | slot_hold(qd); |
1bf59bf6 SW |
441 | return 1; |
442 | } | |
443 | ||
b3b94faa DT |
444 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
445 | { | |
446 | struct gfs2_quota_data *qd = NULL; | |
447 | int error; | |
448 | int found = 0; | |
449 | ||
450 | *qdp = NULL; | |
451 | ||
bc98a42c | 452 | if (sb_rdonly(sdp->sd_vfs)) |
b3b94faa DT |
453 | return 0; |
454 | ||
7d80823e | 455 | spin_lock(&qd_lock); |
b3b94faa DT |
456 | |
457 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
458 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
459 | if (found) | |
460 | break; | |
b3b94faa DT |
461 | } |
462 | ||
463 | if (!found) | |
464 | qd = NULL; | |
465 | ||
7d80823e | 466 | spin_unlock(&qd_lock); |
b3b94faa DT |
467 | |
468 | if (qd) { | |
469 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
470 | error = bh_get(qd); | |
471 | if (error) { | |
472 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
473 | slot_put(qd); | |
474 | qd_put(qd); | |
475 | return error; | |
476 | } | |
477 | } | |
478 | ||
479 | *qdp = qd; | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
b3b94faa DT |
484 | static void qd_unlock(struct gfs2_quota_data *qd) |
485 | { | |
15562c43 | 486 | gfs2_assert_warn(qd->qd_gl->gl_name.ln_sbd, |
568f4c96 | 487 | test_bit(QDF_LOCKED, &qd->qd_flags)); |
b3b94faa DT |
488 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
489 | bh_put(qd); | |
490 | slot_put(qd); | |
491 | qd_put(qd); | |
492 | } | |
493 | ||
b59c8b6f | 494 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
495 | struct gfs2_quota_data **qdp) |
496 | { | |
497 | int error; | |
498 | ||
05e0a60d | 499 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
500 | if (error) |
501 | return error; | |
502 | ||
503 | error = slot_get(*qdp); | |
504 | if (error) | |
505 | goto fail; | |
506 | ||
507 | error = bh_get(*qdp); | |
508 | if (error) | |
509 | goto fail_slot; | |
510 | ||
511 | return 0; | |
512 | ||
a91ea69f | 513 | fail_slot: |
b3b94faa | 514 | slot_put(*qdp); |
a91ea69f | 515 | fail: |
b3b94faa DT |
516 | qd_put(*qdp); |
517 | return error; | |
518 | } | |
519 | ||
520 | static void qdsb_put(struct gfs2_quota_data *qd) | |
521 | { | |
522 | bh_put(qd); | |
523 | slot_put(qd); | |
524 | qd_put(qd); | |
525 | } | |
526 | ||
b54e9a0b BP |
527 | /** |
528 | * gfs2_qa_alloc - make sure we have a quota allocations data structure, | |
529 | * if necessary | |
530 | * @ip: the inode for this reservation | |
531 | */ | |
532 | int gfs2_qa_alloc(struct gfs2_inode *ip) | |
533 | { | |
534 | int error = 0; | |
535 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
536 | ||
537 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
538 | return 0; | |
539 | ||
540 | down_write(&ip->i_rw_mutex); | |
541 | if (ip->i_qadata == NULL) { | |
542 | ip->i_qadata = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS); | |
543 | if (!ip->i_qadata) | |
544 | error = -ENOMEM; | |
545 | } | |
546 | up_write(&ip->i_rw_mutex); | |
547 | return error; | |
548 | } | |
549 | ||
a097dc7e | 550 | void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount) |
b54e9a0b BP |
551 | { |
552 | down_write(&ip->i_rw_mutex); | |
a097dc7e | 553 | if (ip->i_qadata && ((wcount == NULL) || (atomic_read(wcount) <= 1))) { |
b54e9a0b BP |
554 | kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata); |
555 | ip->i_qadata = NULL; | |
556 | } | |
557 | up_write(&ip->i_rw_mutex); | |
558 | } | |
559 | ||
7c06b5d6 | 560 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 561 | { |
feaa7bba | 562 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 563 | struct gfs2_quota_data **qd; |
b3b94faa DT |
564 | int error; |
565 | ||
b54e9a0b BP |
566 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
567 | return 0; | |
568 | ||
569 | if (ip->i_qadata == NULL) { | |
570 | error = gfs2_rsqa_alloc(ip); | |
aaaf68c5 AP |
571 | if (error) |
572 | return error; | |
573 | } | |
5407e242 | 574 | |
b54e9a0b | 575 | qd = ip->i_qadata->qa_qd; |
5407e242 | 576 | |
b54e9a0b | 577 | if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) || |
b3b94faa DT |
578 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
579 | return -EIO; | |
580 | ||
b59c8b6f | 581 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
582 | if (error) |
583 | goto out; | |
b54e9a0b | 584 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
585 | qd++; |
586 | ||
b59c8b6f | 587 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
588 | if (error) |
589 | goto out; | |
b54e9a0b | 590 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
591 | qd++; |
592 | ||
6b24c0d2 EB |
593 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
594 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 595 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
596 | if (error) |
597 | goto out; | |
b54e9a0b | 598 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
599 | qd++; |
600 | } | |
601 | ||
6b24c0d2 EB |
602 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
603 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 604 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
605 | if (error) |
606 | goto out; | |
b54e9a0b | 607 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
608 | qd++; |
609 | } | |
610 | ||
a91ea69f | 611 | out: |
b3b94faa DT |
612 | if (error) |
613 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
614 | return error; |
615 | } | |
616 | ||
617 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
618 | { | |
feaa7bba | 619 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b58bf407 | 620 | u32 x; |
b3b94faa | 621 | |
b54e9a0b | 622 | if (ip->i_qadata == NULL) |
5407e242 | 623 | return; |
b3b94faa DT |
624 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
625 | ||
b54e9a0b BP |
626 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
627 | qdsb_put(ip->i_qadata->qa_qd[x]); | |
628 | ip->i_qadata->qa_qd[x] = NULL; | |
b3b94faa | 629 | } |
b54e9a0b | 630 | ip->i_qadata->qa_qd_num = 0; |
b3b94faa DT |
631 | } |
632 | ||
633 | static int sort_qd(const void *a, const void *b) | |
634 | { | |
48fac179 SW |
635 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
636 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 637 | |
05e0a60d | 638 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 639 | return -1; |
05e0a60d | 640 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 641 | return 1; |
48fac179 | 642 | return 0; |
b3b94faa DT |
643 | } |
644 | ||
cd915493 | 645 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa | 646 | { |
15562c43 | 647 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 648 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 649 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 650 | s64 x; |
b3b94faa | 651 | |
f55ab26a | 652 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 653 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
654 | |
655 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
656 | qc->qc_change = 0; | |
657 | qc->qc_flags = 0; | |
05e0a60d | 658 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 659 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 660 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
661 | } |
662 | ||
b44b84d7 | 663 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
664 | qc->qc_change = cpu_to_be64(x); |
665 | ||
7d80823e | 666 | spin_lock(&qd_lock); |
b3b94faa | 667 | qd->qd_change = x; |
7d80823e | 668 | spin_unlock(&qd_lock); |
b3b94faa DT |
669 | |
670 | if (!x) { | |
671 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
672 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
673 | qc->qc_flags = 0; | |
674 | qc->qc_id = 0; | |
675 | slot_put(qd); | |
676 | qd_put(qd); | |
677 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
678 | qd_hold(qd); | |
679 | slot_hold(qd); | |
680 | } | |
907b9bce | 681 | |
9cde2898 AD |
682 | if (change < 0) /* Reset quiet flag if we freed some blocks */ |
683 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
f55ab26a | 684 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
685 | } |
686 | ||
39a72580 AD |
687 | static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index, |
688 | unsigned off, void *buf, unsigned bytes) | |
689 | { | |
690 | struct inode *inode = &ip->i_inode; | |
691 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
692 | struct address_space *mapping = inode->i_mapping; | |
693 | struct page *page; | |
694 | struct buffer_head *bh; | |
695 | void *kaddr; | |
696 | u64 blk; | |
697 | unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0; | |
698 | unsigned to_write = bytes, pg_off = off; | |
699 | int done = 0; | |
700 | ||
09cbfeaf | 701 | blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift); |
39a72580 AD |
702 | boff = off % bsize; |
703 | ||
704 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
705 | if (!page) | |
706 | return -ENOMEM; | |
707 | if (!page_has_buffers(page)) | |
708 | create_empty_buffers(page, bsize, 0); | |
709 | ||
710 | bh = page_buffers(page); | |
711 | while (!done) { | |
712 | /* Find the beginning block within the page */ | |
713 | if (pg_off >= ((bnum * bsize) + bsize)) { | |
714 | bh = bh->b_this_page; | |
715 | bnum++; | |
716 | blk++; | |
717 | continue; | |
718 | } | |
719 | if (!buffer_mapped(bh)) { | |
720 | gfs2_block_map(inode, blk, bh, 1); | |
721 | if (!buffer_mapped(bh)) | |
722 | goto unlock_out; | |
723 | /* If it's a newly allocated disk block, zero it */ | |
724 | if (buffer_new(bh)) | |
725 | zero_user(page, bnum * bsize, bh->b_size); | |
726 | } | |
727 | if (PageUptodate(page)) | |
728 | set_buffer_uptodate(bh); | |
729 | if (!buffer_uptodate(bh)) { | |
e477b24b | 730 | ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &bh); |
39a72580 AD |
731 | wait_on_buffer(bh); |
732 | if (!buffer_uptodate(bh)) | |
733 | goto unlock_out; | |
734 | } | |
845802b1 AG |
735 | if (gfs2_is_jdata(ip)) |
736 | gfs2_trans_add_data(ip->i_gl, bh); | |
737 | else | |
738 | gfs2_ordered_add_inode(ip); | |
39a72580 AD |
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); | |
09cbfeaf | 756 | put_page(page); |
39a72580 AD |
757 | |
758 | return 0; | |
759 | ||
760 | unlock_out: | |
761 | unlock_page(page); | |
09cbfeaf | 762 | put_page(page); |
39a72580 AD |
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 | ||
09cbfeaf | 776 | pg_beg = loc >> PAGE_SHIFT; |
45eb0504 | 777 | pg_off = offset_in_page(loc); |
39a72580 AD |
778 | |
779 | /* If the quota straddles a page boundary, split the write in two */ | |
09cbfeaf | 780 | if ((pg_off + nbytes) > PAGE_SIZE) { |
39a72580 | 781 | pg_oflow = 1; |
09cbfeaf | 782 | overflow = (pg_off + nbytes) - PAGE_SIZE; |
39a72580 AD |
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); | |
078cd827 | 857 | inode->i_mtime = inode->i_atime = current_time(inode); |
39a72580 AD |
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 | ||
6da2ec56 | 886 | ghs = kmalloc_array(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); |
c1696fb8 | 958 | gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl, |
805c0907 | 959 | GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC); |
b3b94faa DT |
960 | return error; |
961 | } | |
962 | ||
e285c100 SW |
963 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
964 | { | |
965 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
966 | struct gfs2_quota q; | |
967 | struct gfs2_quota_lvb *qlvb; | |
968 | loff_t pos; | |
969 | int error; | |
970 | ||
971 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
972 | pos = qd2offset(qd); | |
4306629e | 973 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
974 | if (error < 0) |
975 | return error; | |
976 | ||
4e2f8849 | 977 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
978 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
979 | qlvb->__pad = 0; | |
980 | qlvb->qb_limit = q.qu_limit; | |
981 | qlvb->qb_warn = q.qu_warn; | |
982 | qlvb->qb_value = q.qu_value; | |
983 | qd->qd_qb = *qlvb; | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
b3b94faa DT |
988 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
989 | struct gfs2_holder *q_gh) | |
990 | { | |
15562c43 | 991 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 992 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 993 | struct gfs2_holder i_gh; |
b3b94faa DT |
994 | int error; |
995 | ||
a91ea69f | 996 | restart: |
b3b94faa DT |
997 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
998 | if (error) | |
999 | return error; | |
1000 | ||
30133177 AD |
1001 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
1002 | force_refresh = FORCE; | |
1003 | ||
4e2f8849 | 1004 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 1005 | |
e9fc2aa0 | 1006 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 1007 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
1008 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
1009 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
1010 | if (error) |
1011 | return error; | |
1012 | ||
e9fc2aa0 | 1013 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
1014 | if (error) |
1015 | goto fail; | |
1016 | ||
e285c100 SW |
1017 | error = update_qd(sdp, qd); |
1018 | if (error) | |
1e72c0f7 | 1019 | goto fail_gunlock; |
b3b94faa | 1020 | |
e285c100 | 1021 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
1022 | gfs2_glock_dq_uninit(q_gh); |
1023 | force_refresh = 0; | |
1024 | goto restart; | |
b3b94faa DT |
1025 | } |
1026 | ||
1027 | return 0; | |
1028 | ||
a91ea69f | 1029 | fail_gunlock: |
b3b94faa | 1030 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 1031 | fail: |
b3b94faa | 1032 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
1033 | return error; |
1034 | } | |
1035 | ||
7c06b5d6 | 1036 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1037 | { |
feaa7bba | 1038 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 1039 | struct gfs2_quota_data *qd; |
b58bf407 | 1040 | u32 x; |
b3b94faa DT |
1041 | int error = 0; |
1042 | ||
b3b94faa DT |
1043 | if (capable(CAP_SYS_RESOURCE) || |
1044 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1045 | return 0; | |
1046 | ||
b54e9a0b BP |
1047 | error = gfs2_quota_hold(ip, uid, gid); |
1048 | if (error) | |
1049 | return error; | |
1050 | ||
1051 | sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num, | |
5407e242 | 1052 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
b3b94faa | 1053 | |
b54e9a0b BP |
1054 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1055 | qd = ip->i_qadata->qa_qd[x]; | |
1056 | error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]); | |
b3b94faa DT |
1057 | if (error) |
1058 | break; | |
1059 | } | |
1060 | ||
1061 | if (!error) | |
1062 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
1063 | else { | |
1064 | while (x--) | |
b54e9a0b | 1065 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
b3b94faa DT |
1066 | gfs2_quota_unhold(ip); |
1067 | } | |
1068 | ||
1069 | return error; | |
1070 | } | |
1071 | ||
1072 | static int need_sync(struct gfs2_quota_data *qd) | |
1073 | { | |
15562c43 | 1074 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 1075 | struct gfs2_tune *gt = &sdp->sd_tune; |
cd915493 | 1076 | s64 value; |
b3b94faa DT |
1077 | unsigned int num, den; |
1078 | int do_sync = 1; | |
1079 | ||
1080 | if (!qd->qd_qb.qb_limit) | |
1081 | return 0; | |
1082 | ||
7d80823e | 1083 | spin_lock(&qd_lock); |
b3b94faa | 1084 | value = qd->qd_change; |
7d80823e | 1085 | spin_unlock(&qd_lock); |
b3b94faa DT |
1086 | |
1087 | spin_lock(>->gt_spin); | |
1088 | num = gt->gt_quota_scale_num; | |
1089 | den = gt->gt_quota_scale_den; | |
1090 | spin_unlock(>->gt_spin); | |
1091 | ||
1092 | if (value < 0) | |
1093 | do_sync = 0; | |
e9fc2aa0 SW |
1094 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1095 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1096 | do_sync = 0; |
1097 | else { | |
1098 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1099 | value = div_s64(value, den); |
e9fc2aa0 | 1100 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1101 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1102 | do_sync = 0; |
1103 | } | |
1104 | ||
1105 | return do_sync; | |
1106 | } | |
1107 | ||
1108 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1109 | { | |
aabd7c72 | 1110 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1111 | struct gfs2_quota_data *qda[4]; |
1112 | unsigned int count = 0; | |
b58bf407 | 1113 | u32 x; |
aabd7c72 | 1114 | int found; |
b3b94faa DT |
1115 | |
1116 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1117 | goto out; | |
1118 | ||
b54e9a0b | 1119 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
b3b94faa DT |
1120 | struct gfs2_quota_data *qd; |
1121 | int sync; | |
1122 | ||
b54e9a0b | 1123 | qd = ip->i_qadata->qa_qd[x]; |
b3b94faa DT |
1124 | sync = need_sync(qd); |
1125 | ||
b54e9a0b | 1126 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
aabd7c72 SW |
1127 | if (!sync) |
1128 | continue; | |
1129 | ||
7d80823e | 1130 | spin_lock(&qd_lock); |
aabd7c72 | 1131 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1132 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1133 | |
1134 | if (!found) | |
1135 | continue; | |
1136 | ||
1137 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1138 | if (bh_get(qd)) { | |
1139 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1140 | slot_put(qd); | |
1141 | qd_put(qd); | |
1142 | continue; | |
1143 | } | |
b3b94faa | 1144 | |
aabd7c72 | 1145 | qda[count++] = qd; |
b3b94faa DT |
1146 | } |
1147 | ||
1148 | if (count) { | |
1149 | do_sync(count, qda); | |
1150 | for (x = 0; x < count; x++) | |
1151 | qd_unlock(qda[x]); | |
1152 | } | |
1153 | ||
a91ea69f | 1154 | out: |
b3b94faa DT |
1155 | gfs2_quota_unhold(ip); |
1156 | } | |
1157 | ||
1158 | #define MAX_LINE 256 | |
1159 | ||
1160 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1161 | { | |
15562c43 | 1162 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 1163 | |
8382e26b JP |
1164 | fs_info(sdp, "quota %s for %s %u\n", |
1165 | type, | |
d77d1b58 JP |
1166 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1167 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1168 | |
1169 | return 0; | |
1170 | } | |
1171 | ||
25435e5e AD |
1172 | /** |
1173 | * gfs2_quota_check - check if allocating new blocks will exceed quota | |
1174 | * @ip: The inode for which this check is being performed | |
1175 | * @uid: The uid to check against | |
1176 | * @gid: The gid to check against | |
1177 | * @ap: The allocation parameters. ap->target contains the requested | |
1178 | * blocks. ap->min_target, if set, contains the minimum blks | |
1179 | * requested. | |
1180 | * | |
1181 | * Returns: 0 on success. | |
1182 | * min_req = ap->min_target ? ap->min_target : ap->target; | |
243fea4d | 1183 | * quota must allow at least min_req blks for success and |
25435e5e AD |
1184 | * ap->allowed is set to the number of blocks allowed |
1185 | * | |
1186 | * -EDQUOT otherwise, quota violation. ap->allowed is set to number | |
1187 | * of blocks available. | |
1188 | */ | |
b8fbf471 AD |
1189 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, |
1190 | struct gfs2_alloc_parms *ap) | |
b3b94faa | 1191 | { |
feaa7bba | 1192 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1193 | struct gfs2_quota_data *qd; |
25435e5e | 1194 | s64 value, warn, limit; |
b58bf407 | 1195 | u32 x; |
b3b94faa DT |
1196 | int error = 0; |
1197 | ||
25435e5e | 1198 | ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ |
b3b94faa DT |
1199 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
1200 | return 0; | |
1201 | ||
1202 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1203 | return 0; | |
1204 | ||
b54e9a0b BP |
1205 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1206 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1207 | |
05e0a60d EB |
1208 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1209 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1210 | continue; |
1211 | ||
25435e5e AD |
1212 | warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn); |
1213 | limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit); | |
e9fc2aa0 | 1214 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1215 | spin_lock(&qd_lock); |
25435e5e | 1216 | value += qd->qd_change; |
7d80823e | 1217 | spin_unlock(&qd_lock); |
b3b94faa | 1218 | |
25435e5e AD |
1219 | if (limit > 0 && (limit - value) < ap->allowed) |
1220 | ap->allowed = limit - value; | |
1221 | /* If we can't meet the target */ | |
1222 | if (limit && limit < (value + (s64)ap->target)) { | |
1223 | /* If no min_target specified or we don't meet | |
1224 | * min_target, return -EDQUOT */ | |
1225 | if (!ap->min_target || ap->min_target > ap->allowed) { | |
9cde2898 AD |
1226 | if (!test_and_set_bit(QDF_QMSG_QUIET, |
1227 | &qd->qd_flags)) { | |
1228 | print_message(qd, "exceeded"); | |
1229 | quota_send_warning(qd->qd_id, | |
1230 | sdp->sd_vfs->s_dev, | |
1231 | QUOTA_NL_BHARDWARN); | |
1232 | } | |
25435e5e AD |
1233 | error = -EDQUOT; |
1234 | break; | |
1235 | } | |
1236 | } else if (warn && warn < value && | |
b3b94faa | 1237 | time_after_eq(jiffies, qd->qd_last_warn + |
25435e5e AD |
1238 | gfs2_tune_get(sdp, gt_quota_warn_period) |
1239 | * HZ)) { | |
05e0a60d | 1240 | quota_send_warning(qd->qd_id, |
2ec46505 | 1241 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1242 | error = print_message(qd, "warning"); |
1243 | qd->qd_last_warn = jiffies; | |
1244 | } | |
1245 | } | |
b3b94faa DT |
1246 | return error; |
1247 | } | |
1248 | ||
cd915493 | 1249 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1250 | kuid_t uid, kgid_t gid) |
b3b94faa | 1251 | { |
b3b94faa | 1252 | struct gfs2_quota_data *qd; |
b58bf407 | 1253 | u32 x; |
b54e9a0b | 1254 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1255 | |
b54e9a0b BP |
1256 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON || |
1257 | gfs2_assert_warn(sdp, change)) | |
b3b94faa | 1258 | return; |
383f01fb | 1259 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1260 | return; |
1261 | ||
b54e9a0b BP |
1262 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1263 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1264 | |
05e0a60d EB |
1265 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1266 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1267 | do_qc(qd, change); |
b3b94faa DT |
1268 | } |
1269 | } | |
1270 | } | |
1271 | ||
ceed1723 | 1272 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1273 | { |
8c42d637 | 1274 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1275 | struct gfs2_quota_data **qda; |
f3b64b57 | 1276 | unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder); |
b3b94faa DT |
1277 | unsigned int num_qd; |
1278 | unsigned int x; | |
1279 | int error = 0; | |
1280 | ||
b3b94faa DT |
1281 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1282 | if (!qda) | |
1283 | return -ENOMEM; | |
1284 | ||
e46c772d SW |
1285 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1286 | sdp->sd_quota_sync_gen++; | |
1287 | ||
b3b94faa DT |
1288 | do { |
1289 | num_qd = 0; | |
1290 | ||
1291 | for (;;) { | |
1292 | error = qd_fish(sdp, qda + num_qd); | |
1293 | if (error || !qda[num_qd]) | |
1294 | break; | |
1295 | if (++num_qd == max_qd) | |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | if (num_qd) { | |
1300 | if (!error) | |
1301 | error = do_sync(num_qd, qda); | |
1302 | if (!error) | |
1303 | for (x = 0; x < num_qd; x++) | |
1304 | qda[x]->qd_sync_gen = | |
1305 | sdp->sd_quota_sync_gen; | |
1306 | ||
1307 | for (x = 0; x < num_qd; x++) | |
1308 | qd_unlock(qda[x]); | |
1309 | } | |
1310 | } while (!error && num_qd == max_qd); | |
1311 | ||
e46c772d | 1312 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1313 | kfree(qda); |
1314 | ||
1315 | return error; | |
1316 | } | |
1317 | ||
ed87dabc | 1318 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1319 | { |
1320 | struct gfs2_quota_data *qd; | |
1321 | struct gfs2_holder q_gh; | |
1322 | int error; | |
1323 | ||
05e0a60d | 1324 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1325 | if (error) |
1326 | return error; | |
1327 | ||
1328 | error = do_glock(qd, FORCE, &q_gh); | |
1329 | if (!error) | |
1330 | gfs2_glock_dq_uninit(&q_gh); | |
1331 | ||
1332 | qd_put(qd); | |
b3b94faa DT |
1333 | return error; |
1334 | } | |
1335 | ||
b3b94faa DT |
1336 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1337 | { | |
feaa7bba | 1338 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1339 | u64 size = i_size_read(sdp->sd_qc_inode); |
1340 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1341 | unsigned int x, slot = 0; |
1342 | unsigned int found = 0; | |
c754fbbb | 1343 | unsigned int hash; |
ee2411a8 | 1344 | unsigned int bm_size; |
cd915493 SW |
1345 | u64 dblock; |
1346 | u32 extlen = 0; | |
b3b94faa DT |
1347 | int error; |
1348 | ||
a2e0f799 | 1349 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1350 | return -EIO; |
a2e0f799 | 1351 | |
b3b94faa | 1352 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1353 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1354 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1355 | error = -ENOMEM; |
fcf10d38 | 1356 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1357 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 FF |
1358 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
1359 | __GFP_ZERO, PAGE_KERNEL); | |
b3b94faa DT |
1360 | if (!sdp->sd_quota_bitmap) |
1361 | return error; | |
1362 | ||
b3b94faa DT |
1363 | for (x = 0; x < blocks; x++) { |
1364 | struct buffer_head *bh; | |
7aed98fb | 1365 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1366 | unsigned int y; |
1367 | ||
1368 | if (!extlen) { | |
1369 | int new = 0; | |
feaa7bba | 1370 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1371 | if (error) |
1372 | goto fail; | |
1373 | } | |
b3b94faa | 1374 | error = -EIO; |
7276b3b0 SW |
1375 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1376 | if (!bh) | |
1377 | goto fail; | |
b3b94faa DT |
1378 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1379 | brelse(bh); | |
1380 | goto fail; | |
1381 | } | |
1382 | ||
7aed98fb | 1383 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1384 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1385 | y++, slot++) { |
b3b94faa | 1386 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1387 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1388 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1389 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1390 | USRQUOTA : GRPQUOTA; | |
1391 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1392 | be32_to_cpu(qc->qc_id)); | |
1393 | qc++; | |
1394 | if (!qc_change) | |
b3b94faa DT |
1395 | continue; |
1396 | ||
c754fbbb SW |
1397 | hash = gfs2_qd_hash(sdp, qc_id); |
1398 | qd = qd_alloc(hash, sdp, qc_id); | |
1399 | if (qd == NULL) { | |
b3b94faa DT |
1400 | brelse(bh); |
1401 | goto fail; | |
1402 | } | |
1403 | ||
1404 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1405 | qd->qd_change = qc_change; |
b3b94faa DT |
1406 | qd->qd_slot = slot; |
1407 | qd->qd_slot_count = 1; | |
b3b94faa | 1408 | |
7d80823e | 1409 | spin_lock(&qd_lock); |
ee2411a8 | 1410 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1411 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1412 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1413 | spin_unlock(&qd_lock); |
b3b94faa | 1414 | |
c754fbbb SW |
1415 | spin_lock_bucket(hash); |
1416 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1417 | spin_unlock_bucket(hash); | |
1418 | ||
b3b94faa DT |
1419 | found++; |
1420 | } | |
1421 | ||
1422 | brelse(bh); | |
1423 | dblock++; | |
1424 | extlen--; | |
1425 | } | |
1426 | ||
1427 | if (found) | |
1428 | fs_info(sdp, "found %u quota changes\n", found); | |
1429 | ||
1430 | return 0; | |
1431 | ||
a91ea69f | 1432 | fail: |
b3b94faa DT |
1433 | gfs2_quota_cleanup(sdp); |
1434 | return error; | |
1435 | } | |
1436 | ||
b3b94faa DT |
1437 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1438 | { | |
1439 | struct list_head *head = &sdp->sd_quota_list; | |
1440 | struct gfs2_quota_data *qd; | |
b3b94faa | 1441 | |
7d80823e | 1442 | spin_lock(&qd_lock); |
b3b94faa DT |
1443 | while (!list_empty(head)) { |
1444 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1445 | ||
b3b94faa | 1446 | list_del(&qd->qd_list); |
c754fbbb | 1447 | |
0a7ab79c | 1448 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1449 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1450 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1451 | spin_unlock(&qd_lock); |
b3b94faa | 1452 | |
c754fbbb SW |
1453 | spin_lock_bucket(qd->qd_hash); |
1454 | hlist_bl_del_rcu(&qd->qd_hlist); | |
1455 | spin_unlock_bucket(qd->qd_hash); | |
1456 | ||
8ad151c2 SW |
1457 | gfs2_assert_warn(sdp, !qd->qd_change); |
1458 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
b3b94faa DT |
1459 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
1460 | ||
f057f6cd | 1461 | gfs2_glock_put(qd->qd_gl); |
c754fbbb | 1462 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
b3b94faa | 1463 | |
7d80823e | 1464 | spin_lock(&qd_lock); |
b3b94faa | 1465 | } |
7d80823e | 1466 | spin_unlock(&qd_lock); |
b3b94faa DT |
1467 | |
1468 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1469 | ||
3cdcf63e AV |
1470 | kvfree(sdp->sd_quota_bitmap); |
1471 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1472 | } |
1473 | ||
37b2c837 SW |
1474 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1475 | { | |
1476 | if (error == 0 || error == -EROFS) | |
1477 | return; | |
eb43e660 | 1478 | if (!gfs2_withdrawn(sdp)) { |
37b2c837 | 1479 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); |
942b0cdd BP |
1480 | sdp->sd_log_error = error; |
1481 | wake_up(&sdp->sd_logd_waitq); | |
1482 | } | |
37b2c837 SW |
1483 | } |
1484 | ||
1485 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1486 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1487 | unsigned long t, unsigned long *timeo, |
1488 | unsigned int *new_timeo) | |
1489 | { | |
1490 | if (t >= *timeo) { | |
8c42d637 | 1491 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1492 | quotad_error(sdp, msg, error); |
1493 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1494 | } else { | |
1495 | *timeo -= t; | |
1496 | } | |
1497 | } | |
1498 | ||
813e0c46 SW |
1499 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1500 | { | |
1501 | struct gfs2_inode *ip; | |
1502 | ||
1503 | while(1) { | |
1504 | ip = NULL; | |
1505 | spin_lock(&sdp->sd_trunc_lock); | |
1506 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1507 | ip = list_entry(sdp->sd_trunc_list.next, | |
1508 | struct gfs2_inode, i_trunc_list); | |
1509 | list_del_init(&ip->i_trunc_list); | |
1510 | } | |
1511 | spin_unlock(&sdp->sd_trunc_lock); | |
1512 | if (ip == NULL) | |
1513 | return; | |
1514 | gfs2_glock_finish_truncate(ip); | |
1515 | } | |
1516 | } | |
1517 | ||
3d3c10f2 BM |
1518 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1519 | if (!sdp->sd_statfs_force_sync) { | |
1520 | sdp->sd_statfs_force_sync = 1; | |
1521 | wake_up(&sdp->sd_quota_wait); | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | ||
37b2c837 SW |
1526 | /** |
1527 | * gfs2_quotad - Write cached quota changes into the quota file | |
1528 | * @sdp: Pointer to GFS2 superblock | |
1529 | * | |
1530 | */ | |
1531 | ||
1532 | int gfs2_quotad(void *data) | |
1533 | { | |
1534 | struct gfs2_sbd *sdp = data; | |
1535 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1536 | unsigned long statfs_timeo = 0; | |
1537 | unsigned long quotad_timeo = 0; | |
1538 | unsigned long t = 0; | |
1539 | DEFINE_WAIT(wait); | |
813e0c46 | 1540 | int empty; |
37b2c837 SW |
1541 | |
1542 | while (!kthread_should_stop()) { | |
1543 | ||
1544 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1545 | if (sdp->sd_statfs_force_sync) { |
1546 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1547 | quotad_error(sdp, "statfs", error); | |
1548 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1549 | } | |
1550 | else | |
1551 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1552 | &statfs_timeo, | |
1553 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1554 | |
1555 | /* Update quota file */ | |
edd2e9ac | 1556 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1557 | "ad_timeo, &tune->gt_quota_quantum); |
1558 | ||
813e0c46 SW |
1559 | /* Check for & recover partially truncated inodes */ |
1560 | quotad_check_trunc_list(sdp); | |
1561 | ||
a0acae0e TH |
1562 | try_to_freeze(); |
1563 | ||
37b2c837 SW |
1564 | t = min(quotad_timeo, statfs_timeo); |
1565 | ||
7fa5d20d | 1566 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1567 | spin_lock(&sdp->sd_trunc_lock); |
1568 | empty = list_empty(&sdp->sd_trunc_list); | |
1569 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1570 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1571 | t -= schedule_timeout(t); |
1572 | else | |
1573 | t = 0; | |
37b2c837 SW |
1574 | finish_wait(&sdp->sd_quota_wait, &wait); |
1575 | } | |
1576 | ||
1577 | return 0; | |
1578 | } | |
1579 | ||
e54b2e2d | 1580 | static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state) |
1d371b5e SW |
1581 | { |
1582 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1583 | ||
e54b2e2d | 1584 | memset(state, 0, sizeof(*state)); |
ad6bb90f CH |
1585 | |
1586 | switch (sdp->sd_args.ar_quota) { | |
1587 | case GFS2_QUOTA_ON: | |
e54b2e2d JK |
1588 | state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; |
1589 | state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; | |
ad6bb90f CH |
1590 | /*FALLTHRU*/ |
1591 | case GFS2_QUOTA_ACCOUNT: | |
e54b2e2d JK |
1592 | state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED | |
1593 | QCI_SYSFILE; | |
1594 | state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED | | |
1595 | QCI_SYSFILE; | |
ad6bb90f CH |
1596 | break; |
1597 | case GFS2_QUOTA_OFF: | |
1598 | break; | |
1599 | } | |
1d371b5e | 1600 | if (sdp->sd_quota_inode) { |
e54b2e2d JK |
1601 | state->s_state[USRQUOTA].ino = |
1602 | GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1603 | state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks; | |
1d371b5e | 1604 | } |
e54b2e2d JK |
1605 | state->s_state[USRQUOTA].nextents = 1; /* unsupported */ |
1606 | state->s_state[GRPQUOTA] = state->s_state[USRQUOTA]; | |
1607 | state->s_incoredqs = list_lru_count(&gfs2_qd_lru); | |
1d371b5e SW |
1608 | return 0; |
1609 | } | |
1610 | ||
74a8a103 | 1611 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1612 | struct qc_dqblk *fdq) |
113d6b3c SW |
1613 | { |
1614 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1615 | struct gfs2_quota_lvb *qlvb; | |
1616 | struct gfs2_quota_data *qd; | |
1617 | struct gfs2_holder q_gh; | |
1618 | int error; | |
1619 | ||
14bf61ff | 1620 | memset(fdq, 0, sizeof(*fdq)); |
113d6b3c SW |
1621 | |
1622 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1623 | return -ESRCH; /* Crazy XFS error code */ | |
1624 | ||
236c64e4 EB |
1625 | if ((qid.type != USRQUOTA) && |
1626 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1627 | return -EINVAL; |
1628 | ||
05e0a60d | 1629 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1630 | if (error) |
1631 | return error; | |
1632 | error = do_glock(qd, FORCE, &q_gh); | |
1633 | if (error) | |
1634 | goto out; | |
1635 | ||
4e2f8849 | 1636 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
14bf61ff JK |
1637 | fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift; |
1638 | fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift; | |
1639 | fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift; | |
113d6b3c SW |
1640 | |
1641 | gfs2_glock_dq_uninit(&q_gh); | |
1642 | out: | |
1643 | qd_put(qd); | |
1644 | return error; | |
1645 | } | |
1646 | ||
e285c100 | 1647 | /* GFS2 only supports a subset of the XFS fields */ |
14bf61ff | 1648 | #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE) |
e285c100 | 1649 | |
74a8a103 | 1650 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1651 | struct qc_dqblk *fdq) |
e285c100 SW |
1652 | { |
1653 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1654 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1655 | struct gfs2_quota_data *qd; | |
1656 | struct gfs2_holder q_gh, i_gh; | |
1657 | unsigned int data_blocks, ind_blocks; | |
1658 | unsigned int blocks = 0; | |
1659 | int alloc_required; | |
e285c100 SW |
1660 | loff_t offset; |
1661 | int error; | |
1662 | ||
1663 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1664 | return -ESRCH; /* Crazy XFS error code */ | |
1665 | ||
236c64e4 EB |
1666 | if ((qid.type != USRQUOTA) && |
1667 | (qid.type != GRPQUOTA)) | |
e285c100 | 1668 | return -EINVAL; |
e285c100 SW |
1669 | |
1670 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1671 | return -EINVAL; | |
e285c100 | 1672 | |
05e0a60d | 1673 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1674 | if (error) |
1675 | return error; | |
1676 | ||
b54e9a0b | 1677 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
1678 | if (error) |
1679 | goto out_put; | |
1680 | ||
5955102c | 1681 | inode_lock(&ip->i_inode); |
e285c100 SW |
1682 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); |
1683 | if (error) | |
0a305e49 | 1684 | goto out_unlockput; |
e285c100 SW |
1685 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1686 | if (error) | |
1687 | goto out_q; | |
1688 | ||
1689 | /* Check for existing entry, if none then alloc new blocks */ | |
1690 | error = update_qd(sdp, qd); | |
1691 | if (error) | |
1692 | goto out_i; | |
1693 | ||
1694 | /* If nothing has changed, this is a no-op */ | |
14bf61ff JK |
1695 | if ((fdq->d_fieldmask & QC_SPC_SOFT) && |
1696 | ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) | |
1697 | fdq->d_fieldmask ^= QC_SPC_SOFT; | |
802ec9b6 | 1698 | |
14bf61ff JK |
1699 | if ((fdq->d_fieldmask & QC_SPC_HARD) && |
1700 | ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) | |
1701 | fdq->d_fieldmask ^= QC_SPC_HARD; | |
802ec9b6 | 1702 | |
14bf61ff JK |
1703 | if ((fdq->d_fieldmask & QC_SPACE) && |
1704 | ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1705 | fdq->d_fieldmask ^= QC_SPACE; | |
802ec9b6 | 1706 | |
e285c100 SW |
1707 | if (fdq->d_fieldmask == 0) |
1708 | goto out_i; | |
1709 | ||
1710 | offset = qd2offset(qd); | |
461cb419 | 1711 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1712 | if (gfs2_is_stuffed(ip)) |
1713 | alloc_required = 1; | |
e285c100 | 1714 | if (alloc_required) { |
7b9cff46 | 1715 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1716 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1717 | &data_blocks, &ind_blocks); | |
564e12b1 | 1718 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1719 | ap.target = blocks; |
1720 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1721 | if (error) |
564e12b1 | 1722 | goto out_i; |
71f890f7 | 1723 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1724 | } |
1725 | ||
e79a46a0 AD |
1726 | /* Some quotas span block boundaries and can update two blocks, |
1727 | adding an extra block to the transaction to handle such quotas */ | |
1728 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1729 | if (error) |
1730 | goto out_release; | |
1731 | ||
1732 | /* Apply changes */ | |
1733 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
9cde2898 AD |
1734 | if (!error) |
1735 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
e285c100 SW |
1736 | |
1737 | gfs2_trans_end(sdp); | |
1738 | out_release: | |
564e12b1 | 1739 | if (alloc_required) |
e285c100 | 1740 | gfs2_inplace_release(ip); |
e285c100 SW |
1741 | out_i: |
1742 | gfs2_glock_dq_uninit(&i_gh); | |
1743 | out_q: | |
1744 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1745 | out_unlockput: |
5955102c | 1746 | inode_unlock(&ip->i_inode); |
0a305e49 | 1747 | out_put: |
e285c100 SW |
1748 | qd_put(qd); |
1749 | return error; | |
1750 | } | |
1751 | ||
cc632e7f SW |
1752 | const struct quotactl_ops gfs2_quotactl_ops = { |
1753 | .quota_sync = gfs2_quota_sync, | |
e54b2e2d | 1754 | .get_state = gfs2_quota_get_state, |
b9b2dd36 | 1755 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1756 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1757 | }; |
c754fbbb SW |
1758 | |
1759 | void __init gfs2_quota_hash_init(void) | |
1760 | { | |
1761 | unsigned i; | |
1762 | ||
1763 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1764 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1765 | } |