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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 | 117 | while (!list_empty(list)) { |
969183bc | 118 | qd = list_first_entry(list, 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; |
c360abbb BP |
368 | struct inode *inode = sdp->sd_qc_inode; |
369 | struct gfs2_inode *ip = GFS2_I(inode); | |
b3b94faa | 370 | unsigned int block, offset; |
b3b94faa | 371 | struct buffer_head *bh; |
c360abbb | 372 | struct iomap iomap = { }; |
b3b94faa DT |
373 | int error; |
374 | ||
f55ab26a | 375 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
376 | |
377 | if (qd->qd_bh_count++) { | |
f55ab26a | 378 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
379 | return 0; |
380 | } | |
381 | ||
382 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 383 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 384 | |
c360abbb BP |
385 | error = gfs2_iomap_get(inode, |
386 | (loff_t)block << inode->i_blkbits, | |
387 | i_blocksize(inode), &iomap); | |
b3b94faa DT |
388 | if (error) |
389 | goto fail; | |
c360abbb BP |
390 | error = -ENOENT; |
391 | if (iomap.type != IOMAP_MAPPED) | |
392 | goto fail; | |
393 | ||
394 | error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits, | |
395 | DIO_WAIT, 0, &bh); | |
b3b94faa DT |
396 | if (error) |
397 | goto fail; | |
398 | error = -EIO; | |
399 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
400 | goto fail_brelse; | |
401 | ||
402 | qd->qd_bh = bh; | |
403 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
404 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
405 | offset * sizeof(struct gfs2_quota_change)); | |
406 | ||
2e95b665 | 407 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
408 | |
409 | return 0; | |
410 | ||
a91ea69f | 411 | fail_brelse: |
b3b94faa | 412 | brelse(bh); |
a91ea69f | 413 | fail: |
b3b94faa | 414 | qd->qd_bh_count--; |
f55ab26a | 415 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
416 | return error; |
417 | } | |
418 | ||
419 | static void bh_put(struct gfs2_quota_data *qd) | |
420 | { | |
15562c43 | 421 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 422 | |
f55ab26a | 423 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
424 | gfs2_assert(sdp, qd->qd_bh_count); |
425 | if (!--qd->qd_bh_count) { | |
426 | brelse(qd->qd_bh); | |
427 | qd->qd_bh = NULL; | |
428 | qd->qd_bh_qc = NULL; | |
429 | } | |
f55ab26a | 430 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
431 | } |
432 | ||
1bf59bf6 SW |
433 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
434 | u64 *sync_gen) | |
435 | { | |
436 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
437 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
438 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
439 | return 0; | |
440 | ||
2147dbfd SW |
441 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
442 | return 0; | |
1bf59bf6 | 443 | |
2147dbfd | 444 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 445 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 446 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 447 | slot_hold(qd); |
1bf59bf6 SW |
448 | return 1; |
449 | } | |
450 | ||
b3b94faa DT |
451 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
452 | { | |
b846f2d7 | 453 | struct gfs2_quota_data *qd = NULL, *iter; |
b3b94faa | 454 | int error; |
b3b94faa DT |
455 | |
456 | *qdp = NULL; | |
457 | ||
bc98a42c | 458 | if (sb_rdonly(sdp->sd_vfs)) |
b3b94faa DT |
459 | return 0; |
460 | ||
7d80823e | 461 | spin_lock(&qd_lock); |
b3b94faa | 462 | |
b846f2d7 JK |
463 | list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) { |
464 | if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) { | |
465 | qd = iter; | |
1bf59bf6 | 466 | break; |
b846f2d7 | 467 | } |
b3b94faa DT |
468 | } |
469 | ||
7d80823e | 470 | spin_unlock(&qd_lock); |
b3b94faa DT |
471 | |
472 | if (qd) { | |
473 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
474 | error = bh_get(qd); | |
475 | if (error) { | |
476 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
477 | slot_put(qd); | |
478 | qd_put(qd); | |
479 | return error; | |
480 | } | |
481 | } | |
482 | ||
483 | *qdp = qd; | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
b3b94faa DT |
488 | static void qd_unlock(struct gfs2_quota_data *qd) |
489 | { | |
15562c43 | 490 | gfs2_assert_warn(qd->qd_gl->gl_name.ln_sbd, |
568f4c96 | 491 | test_bit(QDF_LOCKED, &qd->qd_flags)); |
b3b94faa DT |
492 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
493 | bh_put(qd); | |
494 | slot_put(qd); | |
495 | qd_put(qd); | |
496 | } | |
497 | ||
b59c8b6f | 498 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
499 | struct gfs2_quota_data **qdp) |
500 | { | |
501 | int error; | |
502 | ||
05e0a60d | 503 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
504 | if (error) |
505 | return error; | |
506 | ||
507 | error = slot_get(*qdp); | |
508 | if (error) | |
509 | goto fail; | |
510 | ||
511 | error = bh_get(*qdp); | |
512 | if (error) | |
513 | goto fail_slot; | |
514 | ||
515 | return 0; | |
516 | ||
a91ea69f | 517 | fail_slot: |
b3b94faa | 518 | slot_put(*qdp); |
a91ea69f | 519 | fail: |
b3b94faa DT |
520 | qd_put(*qdp); |
521 | return error; | |
522 | } | |
523 | ||
524 | static void qdsb_put(struct gfs2_quota_data *qd) | |
525 | { | |
526 | bh_put(qd); | |
527 | slot_put(qd); | |
528 | qd_put(qd); | |
529 | } | |
530 | ||
b54e9a0b | 531 | /** |
2fba46a0 BP |
532 | * gfs2_qa_get - make sure we have a quota allocations data structure, |
533 | * if necessary | |
b54e9a0b BP |
534 | * @ip: the inode for this reservation |
535 | */ | |
2fba46a0 | 536 | int gfs2_qa_get(struct gfs2_inode *ip) |
b54e9a0b | 537 | { |
b54e9a0b | 538 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5fcff61e | 539 | struct inode *inode = &ip->i_inode; |
b54e9a0b BP |
540 | |
541 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
542 | return 0; | |
543 | ||
5fcff61e | 544 | spin_lock(&inode->i_lock); |
b54e9a0b | 545 | if (ip->i_qadata == NULL) { |
5fcff61e BP |
546 | struct gfs2_qadata *tmp; |
547 | ||
548 | spin_unlock(&inode->i_lock); | |
549 | tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS); | |
550 | if (!tmp) | |
551 | return -ENOMEM; | |
552 | ||
553 | spin_lock(&inode->i_lock); | |
554 | if (ip->i_qadata == NULL) | |
555 | ip->i_qadata = tmp; | |
556 | else | |
557 | kmem_cache_free(gfs2_qadata_cachep, tmp); | |
b54e9a0b | 558 | } |
2fba46a0 | 559 | ip->i_qadata->qa_ref++; |
5fcff61e BP |
560 | spin_unlock(&inode->i_lock); |
561 | return 0; | |
b54e9a0b BP |
562 | } |
563 | ||
2fba46a0 | 564 | void gfs2_qa_put(struct gfs2_inode *ip) |
b54e9a0b | 565 | { |
5fcff61e BP |
566 | struct inode *inode = &ip->i_inode; |
567 | ||
568 | spin_lock(&inode->i_lock); | |
2fba46a0 | 569 | if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) { |
b54e9a0b BP |
570 | kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata); |
571 | ip->i_qadata = NULL; | |
572 | } | |
5fcff61e | 573 | spin_unlock(&inode->i_lock); |
b54e9a0b BP |
574 | } |
575 | ||
7c06b5d6 | 576 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 577 | { |
feaa7bba | 578 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 579 | struct gfs2_quota_data **qd; |
b3b94faa DT |
580 | int error; |
581 | ||
b54e9a0b BP |
582 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
583 | return 0; | |
584 | ||
2fba46a0 BP |
585 | error = gfs2_qa_get(ip); |
586 | if (error) | |
587 | return error; | |
5407e242 | 588 | |
b54e9a0b | 589 | qd = ip->i_qadata->qa_qd; |
5407e242 | 590 | |
b54e9a0b | 591 | if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) || |
2fba46a0 BP |
592 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) { |
593 | error = -EIO; | |
594 | goto out; | |
595 | } | |
b3b94faa | 596 | |
b59c8b6f | 597 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa | 598 | if (error) |
2fba46a0 | 599 | goto out_unhold; |
b54e9a0b | 600 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
601 | qd++; |
602 | ||
b59c8b6f | 603 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa | 604 | if (error) |
2fba46a0 | 605 | goto out_unhold; |
b54e9a0b | 606 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
607 | qd++; |
608 | ||
6b24c0d2 EB |
609 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
610 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 611 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa | 612 | if (error) |
2fba46a0 | 613 | goto out_unhold; |
b54e9a0b | 614 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
615 | qd++; |
616 | } | |
617 | ||
6b24c0d2 EB |
618 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
619 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 620 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa | 621 | if (error) |
2fba46a0 | 622 | goto out_unhold; |
b54e9a0b | 623 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
624 | qd++; |
625 | } | |
626 | ||
2fba46a0 | 627 | out_unhold: |
b3b94faa DT |
628 | if (error) |
629 | gfs2_quota_unhold(ip); | |
2fba46a0 | 630 | out: |
b3b94faa DT |
631 | return error; |
632 | } | |
633 | ||
634 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
635 | { | |
feaa7bba | 636 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b58bf407 | 637 | u32 x; |
b3b94faa | 638 | |
b54e9a0b | 639 | if (ip->i_qadata == NULL) |
5407e242 | 640 | return; |
2fba46a0 | 641 | |
b3b94faa DT |
642 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
643 | ||
b54e9a0b BP |
644 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
645 | qdsb_put(ip->i_qadata->qa_qd[x]); | |
646 | ip->i_qadata->qa_qd[x] = NULL; | |
b3b94faa | 647 | } |
b54e9a0b | 648 | ip->i_qadata->qa_qd_num = 0; |
2fba46a0 | 649 | gfs2_qa_put(ip); |
b3b94faa DT |
650 | } |
651 | ||
652 | static int sort_qd(const void *a, const void *b) | |
653 | { | |
48fac179 SW |
654 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
655 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 656 | |
05e0a60d | 657 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 658 | return -1; |
05e0a60d | 659 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 660 | return 1; |
48fac179 | 661 | return 0; |
b3b94faa DT |
662 | } |
663 | ||
cd915493 | 664 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa | 665 | { |
15562c43 | 666 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 667 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 668 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 669 | s64 x; |
b3b94faa | 670 | |
f55ab26a | 671 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 672 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
673 | |
674 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
675 | qc->qc_change = 0; | |
676 | qc->qc_flags = 0; | |
05e0a60d | 677 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 678 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 679 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
680 | } |
681 | ||
b44b84d7 | 682 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
683 | qc->qc_change = cpu_to_be64(x); |
684 | ||
7d80823e | 685 | spin_lock(&qd_lock); |
b3b94faa | 686 | qd->qd_change = x; |
7d80823e | 687 | spin_unlock(&qd_lock); |
b3b94faa DT |
688 | |
689 | if (!x) { | |
690 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
691 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
692 | qc->qc_flags = 0; | |
693 | qc->qc_id = 0; | |
694 | slot_put(qd); | |
695 | qd_put(qd); | |
696 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
697 | qd_hold(qd); | |
698 | slot_hold(qd); | |
699 | } | |
907b9bce | 700 | |
9cde2898 AD |
701 | if (change < 0) /* Reset quiet flag if we freed some blocks */ |
702 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
f55ab26a | 703 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
704 | } |
705 | ||
39a72580 AD |
706 | static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index, |
707 | unsigned off, void *buf, unsigned bytes) | |
708 | { | |
709 | struct inode *inode = &ip->i_inode; | |
710 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
711 | struct address_space *mapping = inode->i_mapping; | |
712 | struct page *page; | |
713 | struct buffer_head *bh; | |
714 | void *kaddr; | |
715 | u64 blk; | |
716 | unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0; | |
717 | unsigned to_write = bytes, pg_off = off; | |
718 | int done = 0; | |
719 | ||
09cbfeaf | 720 | blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift); |
39a72580 AD |
721 | boff = off % bsize; |
722 | ||
723 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
724 | if (!page) | |
725 | return -ENOMEM; | |
726 | if (!page_has_buffers(page)) | |
727 | create_empty_buffers(page, bsize, 0); | |
728 | ||
729 | bh = page_buffers(page); | |
730 | while (!done) { | |
731 | /* Find the beginning block within the page */ | |
732 | if (pg_off >= ((bnum * bsize) + bsize)) { | |
733 | bh = bh->b_this_page; | |
734 | bnum++; | |
735 | blk++; | |
736 | continue; | |
737 | } | |
738 | if (!buffer_mapped(bh)) { | |
739 | gfs2_block_map(inode, blk, bh, 1); | |
740 | if (!buffer_mapped(bh)) | |
741 | goto unlock_out; | |
742 | /* If it's a newly allocated disk block, zero it */ | |
743 | if (buffer_new(bh)) | |
744 | zero_user(page, bnum * bsize, bh->b_size); | |
745 | } | |
746 | if (PageUptodate(page)) | |
747 | set_buffer_uptodate(bh); | |
748 | if (!buffer_uptodate(bh)) { | |
1420c4a5 | 749 | ll_rw_block(REQ_OP_READ | REQ_META | REQ_PRIO, 1, &bh); |
39a72580 AD |
750 | wait_on_buffer(bh); |
751 | if (!buffer_uptodate(bh)) | |
752 | goto unlock_out; | |
753 | } | |
845802b1 AG |
754 | if (gfs2_is_jdata(ip)) |
755 | gfs2_trans_add_data(ip->i_gl, bh); | |
756 | else | |
757 | gfs2_ordered_add_inode(ip); | |
39a72580 AD |
758 | |
759 | /* If we need to write to the next block as well */ | |
760 | if (to_write > (bsize - boff)) { | |
761 | pg_off += (bsize - boff); | |
762 | to_write -= (bsize - boff); | |
763 | boff = pg_off % bsize; | |
764 | continue; | |
765 | } | |
766 | done = 1; | |
767 | } | |
768 | ||
769 | /* Write to the page, now that we have setup the buffer(s) */ | |
770 | kaddr = kmap_atomic(page); | |
771 | memcpy(kaddr + off, buf, bytes); | |
772 | flush_dcache_page(page); | |
773 | kunmap_atomic(kaddr); | |
774 | unlock_page(page); | |
09cbfeaf | 775 | put_page(page); |
39a72580 AD |
776 | |
777 | return 0; | |
778 | ||
779 | unlock_out: | |
780 | unlock_page(page); | |
09cbfeaf | 781 | put_page(page); |
39a72580 AD |
782 | return -EIO; |
783 | } | |
784 | ||
785 | static int gfs2_write_disk_quota(struct gfs2_inode *ip, struct gfs2_quota *qp, | |
786 | loff_t loc) | |
787 | { | |
788 | unsigned long pg_beg; | |
789 | unsigned pg_off, nbytes, overflow = 0; | |
790 | int pg_oflow = 0, error; | |
791 | void *ptr; | |
792 | ||
793 | nbytes = sizeof(struct gfs2_quota); | |
794 | ||
09cbfeaf | 795 | pg_beg = loc >> PAGE_SHIFT; |
45eb0504 | 796 | pg_off = offset_in_page(loc); |
39a72580 AD |
797 | |
798 | /* If the quota straddles a page boundary, split the write in two */ | |
09cbfeaf | 799 | if ((pg_off + nbytes) > PAGE_SIZE) { |
39a72580 | 800 | pg_oflow = 1; |
09cbfeaf | 801 | overflow = (pg_off + nbytes) - PAGE_SIZE; |
39a72580 AD |
802 | } |
803 | ||
804 | ptr = qp; | |
805 | error = gfs2_write_buf_to_page(ip, pg_beg, pg_off, ptr, | |
806 | nbytes - overflow); | |
807 | /* If there's an overflow, write the remaining bytes to the next page */ | |
808 | if (!error && pg_oflow) | |
809 | error = gfs2_write_buf_to_page(ip, pg_beg + 1, 0, | |
810 | ptr + nbytes - overflow, | |
811 | overflow); | |
812 | return error; | |
813 | } | |
814 | ||
18ec7d5c | 815 | /** |
1e72c0f7 SW |
816 | * gfs2_adjust_quota - adjust record of current block usage |
817 | * @ip: The quota inode | |
818 | * @loc: Offset of the entry in the quota file | |
e285c100 | 819 | * @change: The amount of usage change to record |
1e72c0f7 | 820 | * @qd: The quota data |
e285c100 | 821 | * @fdq: The updated limits to record |
18ec7d5c SW |
822 | * |
823 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
824 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
825 | * |
826 | * Returns: 0 or -ve on error | |
18ec7d5c | 827 | */ |
1e72c0f7 | 828 | |
18ec7d5c | 829 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 | 830 | s64 change, struct gfs2_quota_data *qd, |
14bf61ff | 831 | struct qc_dqblk *fdq) |
18ec7d5c | 832 | { |
feaa7bba | 833 | struct inode *inode = &ip->i_inode; |
14870b45 | 834 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
951b4bd5 | 835 | struct gfs2_quota q; |
39a72580 | 836 | int err; |
e285c100 | 837 | u64 size; |
18ec7d5c | 838 | |
891a8e93 | 839 | if (gfs2_is_stuffed(ip)) { |
7a607a41 | 840 | err = gfs2_unstuff_dinode(ip); |
891a8e93 SW |
841 | if (err) |
842 | return err; | |
843 | } | |
7e619bc3 AD |
844 | |
845 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 846 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
847 | if (err < 0) |
848 | return err; | |
849 | ||
39a72580 | 850 | loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */ |
7e619bc3 | 851 | err = -EIO; |
951b4bd5 | 852 | be64_add_cpu(&q.qu_value, change); |
1bdf4535 | 853 | if (((s64)be64_to_cpu(q.qu_value)) < 0) |
39a72580 | 854 | q.qu_value = 0; /* Never go negative on quota usage */ |
951b4bd5 | 855 | qd->qd_qb.qb_value = q.qu_value; |
7e619bc3 | 856 | if (fdq) { |
14bf61ff JK |
857 | if (fdq->d_fieldmask & QC_SPC_SOFT) { |
858 | q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 859 | qd->qd_qb.qb_warn = q.qu_warn; |
7e619bc3 | 860 | } |
14bf61ff JK |
861 | if (fdq->d_fieldmask & QC_SPC_HARD) { |
862 | q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 863 | qd->qd_qb.qb_limit = q.qu_limit; |
7e619bc3 | 864 | } |
14bf61ff JK |
865 | if (fdq->d_fieldmask & QC_SPACE) { |
866 | q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 867 | qd->qd_qb.qb_value = q.qu_value; |
802ec9b6 | 868 | } |
7e619bc3 AD |
869 | } |
870 | ||
39a72580 AD |
871 | err = gfs2_write_disk_quota(ip, &q, loc); |
872 | if (!err) { | |
873 | size = loc + sizeof(struct gfs2_quota); | |
874 | if (size > inode->i_size) | |
875 | i_size_write(inode, size); | |
078cd827 | 876 | inode->i_mtime = inode->i_atime = current_time(inode); |
39a72580 AD |
877 | mark_inode_dirty(inode); |
878 | set_bit(QDF_REFRESH, &qd->qd_flags); | |
7e619bc3 | 879 | } |
e285c100 | 880 | |
18ec7d5c SW |
881 | return err; |
882 | } | |
883 | ||
b3b94faa DT |
884 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
885 | { | |
15562c43 | 886 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_name.ln_sbd; |
feaa7bba | 887 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 888 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
889 | unsigned int data_blocks, ind_blocks; |
890 | struct gfs2_holder *ghs, i_gh; | |
891 | unsigned int qx, x; | |
892 | struct gfs2_quota_data *qd; | |
71f890f7 | 893 | unsigned reserved; |
f42faf4f | 894 | loff_t offset; |
20b95bf2 | 895 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
896 | int error; |
897 | ||
2fba46a0 | 898 | error = gfs2_qa_get(ip); |
0a305e49 BP |
899 | if (error) |
900 | return error; | |
901 | ||
b3b94faa DT |
902 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
903 | &data_blocks, &ind_blocks); | |
904 | ||
6da2ec56 | 905 | ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
2fba46a0 BP |
906 | if (!ghs) { |
907 | error = -ENOMEM; | |
908 | goto out; | |
909 | } | |
b3b94faa DT |
910 | |
911 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
5955102c | 912 | inode_lock(&ip->i_inode); |
b3b94faa | 913 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 914 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
915 | GL_NOCACHE, &ghs[qx]); |
916 | if (error) | |
2fba46a0 | 917 | goto out_dq; |
b3b94faa DT |
918 | } |
919 | ||
920 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
921 | if (error) | |
2fba46a0 | 922 | goto out_dq; |
b3b94faa DT |
923 | |
924 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 925 | offset = qd2offset(qda[x]); |
461cb419 BP |
926 | if (gfs2_write_alloc_required(ip, offset, |
927 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
928 | nalloc++; |
929 | } | |
930 | ||
20b95bf2 AD |
931 | /* |
932 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
933 | * block to the reservation unconditionally. If the inode | |
934 | * doesn't need unstuffing, the block will be released to the | |
935 | * rgrp since it won't be allocated during the transaction | |
936 | */ | |
7e619bc3 AD |
937 | /* +3 in the end for unstuffing block, inode size update block |
938 | * and another block in case quota straddles page boundary and | |
939 | * two blocks need to be updated instead of 1 */ | |
940 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 941 | |
71f890f7 | 942 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
943 | ap.target = reserved; |
944 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
945 | if (error) |
946 | goto out_alloc; | |
b3b94faa | 947 | |
20b95bf2 | 948 | if (nalloc) |
71f890f7 | 949 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
950 | |
951 | error = gfs2_trans_begin(sdp, blocks, 0); | |
952 | if (error) | |
953 | goto out_ipres; | |
b3b94faa DT |
954 | |
955 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
956 | qd = qda[x]; |
957 | offset = qd2offset(qd); | |
e285c100 | 958 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 959 | if (error) |
b3b94faa | 960 | goto out_end_trans; |
b3b94faa DT |
961 | |
962 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 963 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
964 | } |
965 | ||
966 | error = 0; | |
967 | ||
a91ea69f | 968 | out_end_trans: |
b3b94faa | 969 | gfs2_trans_end(sdp); |
a91ea69f | 970 | out_ipres: |
20b95bf2 | 971 | gfs2_inplace_release(ip); |
a91ea69f | 972 | out_alloc: |
b3b94faa | 973 | gfs2_glock_dq_uninit(&i_gh); |
2fba46a0 | 974 | out_dq: |
b3b94faa DT |
975 | while (qx--) |
976 | gfs2_glock_dq_uninit(&ghs[qx]); | |
5955102c | 977 | inode_unlock(&ip->i_inode); |
b3b94faa | 978 | kfree(ghs); |
c1696fb8 | 979 | gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl, |
805c0907 | 980 | GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC); |
2fba46a0 BP |
981 | out: |
982 | gfs2_qa_put(ip); | |
b3b94faa DT |
983 | return error; |
984 | } | |
985 | ||
e285c100 SW |
986 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
987 | { | |
988 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
989 | struct gfs2_quota q; | |
990 | struct gfs2_quota_lvb *qlvb; | |
991 | loff_t pos; | |
992 | int error; | |
993 | ||
994 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
995 | pos = qd2offset(qd); | |
4306629e | 996 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
997 | if (error < 0) |
998 | return error; | |
999 | ||
4e2f8849 | 1000 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
1001 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
1002 | qlvb->__pad = 0; | |
1003 | qlvb->qb_limit = q.qu_limit; | |
1004 | qlvb->qb_warn = q.qu_warn; | |
1005 | qlvb->qb_value = q.qu_value; | |
1006 | qd->qd_qb = *qlvb; | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
b3b94faa DT |
1011 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
1012 | struct gfs2_holder *q_gh) | |
1013 | { | |
15562c43 | 1014 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
feaa7bba | 1015 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 1016 | struct gfs2_holder i_gh; |
b3b94faa DT |
1017 | int error; |
1018 | ||
a91ea69f | 1019 | restart: |
b3b94faa DT |
1020 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
1021 | if (error) | |
1022 | return error; | |
1023 | ||
30133177 AD |
1024 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
1025 | force_refresh = FORCE; | |
1026 | ||
4e2f8849 | 1027 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 1028 | |
e9fc2aa0 | 1029 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 1030 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
1031 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
1032 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
1033 | if (error) |
1034 | return error; | |
1035 | ||
e9fc2aa0 | 1036 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
1037 | if (error) |
1038 | goto fail; | |
1039 | ||
e285c100 SW |
1040 | error = update_qd(sdp, qd); |
1041 | if (error) | |
1e72c0f7 | 1042 | goto fail_gunlock; |
b3b94faa | 1043 | |
e285c100 | 1044 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
1045 | gfs2_glock_dq_uninit(q_gh); |
1046 | force_refresh = 0; | |
1047 | goto restart; | |
b3b94faa DT |
1048 | } |
1049 | ||
1050 | return 0; | |
1051 | ||
a91ea69f | 1052 | fail_gunlock: |
b3b94faa | 1053 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 1054 | fail: |
b3b94faa | 1055 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
1056 | return error; |
1057 | } | |
1058 | ||
7c06b5d6 | 1059 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1060 | { |
feaa7bba | 1061 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 1062 | struct gfs2_quota_data *qd; |
b58bf407 | 1063 | u32 x; |
b3b94faa DT |
1064 | int error = 0; |
1065 | ||
4ed0c308 | 1066 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) |
b3b94faa DT |
1067 | return 0; |
1068 | ||
b54e9a0b BP |
1069 | error = gfs2_quota_hold(ip, uid, gid); |
1070 | if (error) | |
1071 | return error; | |
1072 | ||
1073 | sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num, | |
5407e242 | 1074 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
b3b94faa | 1075 | |
b54e9a0b BP |
1076 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1077 | qd = ip->i_qadata->qa_qd[x]; | |
1078 | error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]); | |
b3b94faa DT |
1079 | if (error) |
1080 | break; | |
1081 | } | |
1082 | ||
1083 | if (!error) | |
1084 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
1085 | else { | |
1086 | while (x--) | |
b54e9a0b | 1087 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
b3b94faa DT |
1088 | gfs2_quota_unhold(ip); |
1089 | } | |
1090 | ||
1091 | return error; | |
1092 | } | |
1093 | ||
1094 | static int need_sync(struct gfs2_quota_data *qd) | |
1095 | { | |
15562c43 | 1096 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 1097 | struct gfs2_tune *gt = &sdp->sd_tune; |
cd915493 | 1098 | s64 value; |
b3b94faa DT |
1099 | unsigned int num, den; |
1100 | int do_sync = 1; | |
1101 | ||
1102 | if (!qd->qd_qb.qb_limit) | |
1103 | return 0; | |
1104 | ||
7d80823e | 1105 | spin_lock(&qd_lock); |
b3b94faa | 1106 | value = qd->qd_change; |
7d80823e | 1107 | spin_unlock(&qd_lock); |
b3b94faa DT |
1108 | |
1109 | spin_lock(>->gt_spin); | |
1110 | num = gt->gt_quota_scale_num; | |
1111 | den = gt->gt_quota_scale_den; | |
1112 | spin_unlock(>->gt_spin); | |
1113 | ||
1114 | if (value < 0) | |
1115 | do_sync = 0; | |
e9fc2aa0 SW |
1116 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1117 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
1118 | do_sync = 0; |
1119 | else { | |
1120 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1121 | value = div_s64(value, den); |
e9fc2aa0 | 1122 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1123 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1124 | do_sync = 0; |
1125 | } | |
1126 | ||
1127 | return do_sync; | |
1128 | } | |
1129 | ||
1130 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1131 | { | |
aabd7c72 | 1132 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1133 | struct gfs2_quota_data *qda[4]; |
1134 | unsigned int count = 0; | |
b58bf407 | 1135 | u32 x; |
aabd7c72 | 1136 | int found; |
b3b94faa DT |
1137 | |
1138 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
c9cb9e38 | 1139 | return; |
b3b94faa | 1140 | |
b54e9a0b | 1141 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
b3b94faa DT |
1142 | struct gfs2_quota_data *qd; |
1143 | int sync; | |
1144 | ||
b54e9a0b | 1145 | qd = ip->i_qadata->qa_qd[x]; |
b3b94faa DT |
1146 | sync = need_sync(qd); |
1147 | ||
b54e9a0b | 1148 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
aabd7c72 SW |
1149 | if (!sync) |
1150 | continue; | |
1151 | ||
7d80823e | 1152 | spin_lock(&qd_lock); |
aabd7c72 | 1153 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1154 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1155 | |
1156 | if (!found) | |
1157 | continue; | |
1158 | ||
1159 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1160 | if (bh_get(qd)) { | |
1161 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1162 | slot_put(qd); | |
1163 | qd_put(qd); | |
1164 | continue; | |
1165 | } | |
b3b94faa | 1166 | |
aabd7c72 | 1167 | qda[count++] = qd; |
b3b94faa DT |
1168 | } |
1169 | ||
1170 | if (count) { | |
1171 | do_sync(count, qda); | |
1172 | for (x = 0; x < count; x++) | |
1173 | qd_unlock(qda[x]); | |
1174 | } | |
1175 | ||
b3b94faa DT |
1176 | gfs2_quota_unhold(ip); |
1177 | } | |
1178 | ||
1179 | #define MAX_LINE 256 | |
1180 | ||
1181 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1182 | { | |
15562c43 | 1183 | struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd; |
b3b94faa | 1184 | |
8382e26b JP |
1185 | fs_info(sdp, "quota %s for %s %u\n", |
1186 | type, | |
d77d1b58 JP |
1187 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1188 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1189 | |
1190 | return 0; | |
1191 | } | |
1192 | ||
25435e5e AD |
1193 | /** |
1194 | * gfs2_quota_check - check if allocating new blocks will exceed quota | |
1195 | * @ip: The inode for which this check is being performed | |
1196 | * @uid: The uid to check against | |
1197 | * @gid: The gid to check against | |
1198 | * @ap: The allocation parameters. ap->target contains the requested | |
1199 | * blocks. ap->min_target, if set, contains the minimum blks | |
1200 | * requested. | |
1201 | * | |
1202 | * Returns: 0 on success. | |
1203 | * min_req = ap->min_target ? ap->min_target : ap->target; | |
243fea4d | 1204 | * quota must allow at least min_req blks for success and |
25435e5e AD |
1205 | * ap->allowed is set to the number of blocks allowed |
1206 | * | |
1207 | * -EDQUOT otherwise, quota violation. ap->allowed is set to number | |
1208 | * of blocks available. | |
1209 | */ | |
b8fbf471 AD |
1210 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, |
1211 | struct gfs2_alloc_parms *ap) | |
b3b94faa | 1212 | { |
feaa7bba | 1213 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1214 | struct gfs2_quota_data *qd; |
25435e5e | 1215 | s64 value, warn, limit; |
b58bf407 | 1216 | u32 x; |
b3b94faa DT |
1217 | int error = 0; |
1218 | ||
25435e5e | 1219 | ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ |
b3b94faa DT |
1220 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
1221 | return 0; | |
1222 | ||
b54e9a0b BP |
1223 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1224 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1225 | |
05e0a60d EB |
1226 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1227 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1228 | continue; |
1229 | ||
25435e5e AD |
1230 | warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn); |
1231 | limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit); | |
e9fc2aa0 | 1232 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1233 | spin_lock(&qd_lock); |
25435e5e | 1234 | value += qd->qd_change; |
7d80823e | 1235 | spin_unlock(&qd_lock); |
b3b94faa | 1236 | |
25435e5e AD |
1237 | if (limit > 0 && (limit - value) < ap->allowed) |
1238 | ap->allowed = limit - value; | |
1239 | /* If we can't meet the target */ | |
1240 | if (limit && limit < (value + (s64)ap->target)) { | |
1241 | /* If no min_target specified or we don't meet | |
1242 | * min_target, return -EDQUOT */ | |
1243 | if (!ap->min_target || ap->min_target > ap->allowed) { | |
9cde2898 AD |
1244 | if (!test_and_set_bit(QDF_QMSG_QUIET, |
1245 | &qd->qd_flags)) { | |
1246 | print_message(qd, "exceeded"); | |
1247 | quota_send_warning(qd->qd_id, | |
1248 | sdp->sd_vfs->s_dev, | |
1249 | QUOTA_NL_BHARDWARN); | |
1250 | } | |
25435e5e AD |
1251 | error = -EDQUOT; |
1252 | break; | |
1253 | } | |
1254 | } else if (warn && warn < value && | |
b3b94faa | 1255 | time_after_eq(jiffies, qd->qd_last_warn + |
25435e5e AD |
1256 | gfs2_tune_get(sdp, gt_quota_warn_period) |
1257 | * HZ)) { | |
05e0a60d | 1258 | quota_send_warning(qd->qd_id, |
2ec46505 | 1259 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1260 | error = print_message(qd, "warning"); |
1261 | qd->qd_last_warn = jiffies; | |
1262 | } | |
1263 | } | |
b3b94faa DT |
1264 | return error; |
1265 | } | |
1266 | ||
cd915493 | 1267 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1268 | kuid_t uid, kgid_t gid) |
b3b94faa | 1269 | { |
b3b94faa | 1270 | struct gfs2_quota_data *qd; |
b58bf407 | 1271 | u32 x; |
b54e9a0b | 1272 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1273 | |
b54e9a0b BP |
1274 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON || |
1275 | gfs2_assert_warn(sdp, change)) | |
b3b94faa | 1276 | return; |
383f01fb | 1277 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1278 | return; |
1279 | ||
f9615fe3 BP |
1280 | if (gfs2_assert_withdraw(sdp, ip->i_qadata && |
1281 | ip->i_qadata->qa_ref > 0)) | |
1282 | return; | |
b54e9a0b BP |
1283 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1284 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1285 | |
05e0a60d EB |
1286 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1287 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1288 | do_qc(qd, change); |
b3b94faa DT |
1289 | } |
1290 | } | |
1291 | } | |
1292 | ||
ceed1723 | 1293 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1294 | { |
8c42d637 | 1295 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1296 | struct gfs2_quota_data **qda; |
f3b64b57 | 1297 | unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder); |
b3b94faa DT |
1298 | unsigned int num_qd; |
1299 | unsigned int x; | |
1300 | int error = 0; | |
1301 | ||
b3b94faa DT |
1302 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1303 | if (!qda) | |
1304 | return -ENOMEM; | |
1305 | ||
e46c772d SW |
1306 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1307 | sdp->sd_quota_sync_gen++; | |
1308 | ||
b3b94faa DT |
1309 | do { |
1310 | num_qd = 0; | |
1311 | ||
1312 | for (;;) { | |
1313 | error = qd_fish(sdp, qda + num_qd); | |
1314 | if (error || !qda[num_qd]) | |
1315 | break; | |
1316 | if (++num_qd == max_qd) | |
1317 | break; | |
1318 | } | |
1319 | ||
1320 | if (num_qd) { | |
1321 | if (!error) | |
1322 | error = do_sync(num_qd, qda); | |
1323 | if (!error) | |
1324 | for (x = 0; x < num_qd; x++) | |
1325 | qda[x]->qd_sync_gen = | |
1326 | sdp->sd_quota_sync_gen; | |
1327 | ||
1328 | for (x = 0; x < num_qd; x++) | |
1329 | qd_unlock(qda[x]); | |
1330 | } | |
1331 | } while (!error && num_qd == max_qd); | |
1332 | ||
e46c772d | 1333 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1334 | kfree(qda); |
1335 | ||
1336 | return error; | |
1337 | } | |
1338 | ||
ed87dabc | 1339 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1340 | { |
1341 | struct gfs2_quota_data *qd; | |
1342 | struct gfs2_holder q_gh; | |
1343 | int error; | |
1344 | ||
05e0a60d | 1345 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1346 | if (error) |
1347 | return error; | |
1348 | ||
1349 | error = do_glock(qd, FORCE, &q_gh); | |
1350 | if (!error) | |
1351 | gfs2_glock_dq_uninit(&q_gh); | |
1352 | ||
1353 | qd_put(qd); | |
b3b94faa DT |
1354 | return error; |
1355 | } | |
1356 | ||
b3b94faa DT |
1357 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1358 | { | |
feaa7bba | 1359 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1360 | u64 size = i_size_read(sdp->sd_qc_inode); |
1361 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1362 | unsigned int x, slot = 0; |
1363 | unsigned int found = 0; | |
c754fbbb | 1364 | unsigned int hash; |
ee2411a8 | 1365 | unsigned int bm_size; |
cd915493 SW |
1366 | u64 dblock; |
1367 | u32 extlen = 0; | |
b3b94faa DT |
1368 | int error; |
1369 | ||
a2e0f799 | 1370 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1371 | return -EIO; |
a2e0f799 | 1372 | |
b3b94faa | 1373 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1374 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1375 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1376 | error = -ENOMEM; |
fcf10d38 | 1377 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1378 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 | 1379 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
88dca4ca | 1380 | __GFP_ZERO); |
b3b94faa DT |
1381 | if (!sdp->sd_quota_bitmap) |
1382 | return error; | |
1383 | ||
b3b94faa DT |
1384 | for (x = 0; x < blocks; x++) { |
1385 | struct buffer_head *bh; | |
7aed98fb | 1386 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1387 | unsigned int y; |
1388 | ||
1389 | if (!extlen) { | |
9153dac1 AG |
1390 | extlen = 32; |
1391 | error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen); | |
b3b94faa DT |
1392 | if (error) |
1393 | goto fail; | |
1394 | } | |
b3b94faa | 1395 | error = -EIO; |
7276b3b0 SW |
1396 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1397 | if (!bh) | |
1398 | goto fail; | |
b3b94faa DT |
1399 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1400 | brelse(bh); | |
1401 | goto fail; | |
1402 | } | |
1403 | ||
7aed98fb | 1404 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1405 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1406 | y++, slot++) { |
b3b94faa | 1407 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1408 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1409 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1410 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1411 | USRQUOTA : GRPQUOTA; | |
1412 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1413 | be32_to_cpu(qc->qc_id)); | |
1414 | qc++; | |
1415 | if (!qc_change) | |
b3b94faa DT |
1416 | continue; |
1417 | ||
c754fbbb SW |
1418 | hash = gfs2_qd_hash(sdp, qc_id); |
1419 | qd = qd_alloc(hash, sdp, qc_id); | |
1420 | if (qd == NULL) { | |
b3b94faa DT |
1421 | brelse(bh); |
1422 | goto fail; | |
1423 | } | |
1424 | ||
1425 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1426 | qd->qd_change = qc_change; |
b3b94faa DT |
1427 | qd->qd_slot = slot; |
1428 | qd->qd_slot_count = 1; | |
b3b94faa | 1429 | |
7d80823e | 1430 | spin_lock(&qd_lock); |
ee2411a8 | 1431 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1432 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1433 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1434 | spin_unlock(&qd_lock); |
b3b94faa | 1435 | |
c754fbbb SW |
1436 | spin_lock_bucket(hash); |
1437 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1438 | spin_unlock_bucket(hash); | |
1439 | ||
b3b94faa DT |
1440 | found++; |
1441 | } | |
1442 | ||
1443 | brelse(bh); | |
1444 | dblock++; | |
1445 | extlen--; | |
1446 | } | |
1447 | ||
1448 | if (found) | |
1449 | fs_info(sdp, "found %u quota changes\n", found); | |
1450 | ||
1451 | return 0; | |
1452 | ||
a91ea69f | 1453 | fail: |
b3b94faa DT |
1454 | gfs2_quota_cleanup(sdp); |
1455 | return error; | |
1456 | } | |
1457 | ||
b3b94faa DT |
1458 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1459 | { | |
1460 | struct list_head *head = &sdp->sd_quota_list; | |
1461 | struct gfs2_quota_data *qd; | |
b3b94faa | 1462 | |
7d80823e | 1463 | spin_lock(&qd_lock); |
b3b94faa | 1464 | while (!list_empty(head)) { |
969183bc | 1465 | qd = list_last_entry(head, struct gfs2_quota_data, qd_list); |
b3b94faa | 1466 | |
b3b94faa | 1467 | list_del(&qd->qd_list); |
c754fbbb | 1468 | |
0a7ab79c | 1469 | /* Also remove if this qd exists in the reclaim list */ |
2147dbfd | 1470 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
b3b94faa | 1471 | atomic_dec(&sdp->sd_quota_count); |
7d80823e | 1472 | spin_unlock(&qd_lock); |
b3b94faa | 1473 | |
c754fbbb SW |
1474 | spin_lock_bucket(qd->qd_hash); |
1475 | hlist_bl_del_rcu(&qd->qd_hlist); | |
1476 | spin_unlock_bucket(qd->qd_hash); | |
1477 | ||
8ad151c2 SW |
1478 | gfs2_assert_warn(sdp, !qd->qd_change); |
1479 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
b3b94faa DT |
1480 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
1481 | ||
f057f6cd | 1482 | gfs2_glock_put(qd->qd_gl); |
c754fbbb | 1483 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); |
b3b94faa | 1484 | |
7d80823e | 1485 | spin_lock(&qd_lock); |
b3b94faa | 1486 | } |
7d80823e | 1487 | spin_unlock(&qd_lock); |
b3b94faa DT |
1488 | |
1489 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1490 | ||
3cdcf63e AV |
1491 | kvfree(sdp->sd_quota_bitmap); |
1492 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1493 | } |
1494 | ||
37b2c837 SW |
1495 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1496 | { | |
1497 | if (error == 0 || error == -EROFS) | |
1498 | return; | |
eb43e660 | 1499 | if (!gfs2_withdrawn(sdp)) { |
f34a6135 BP |
1500 | if (!cmpxchg(&sdp->sd_log_error, 0, error)) |
1501 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
942b0cdd BP |
1502 | wake_up(&sdp->sd_logd_waitq); |
1503 | } | |
37b2c837 SW |
1504 | } |
1505 | ||
1506 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1507 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1508 | unsigned long t, unsigned long *timeo, |
1509 | unsigned int *new_timeo) | |
1510 | { | |
1511 | if (t >= *timeo) { | |
8c42d637 | 1512 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1513 | quotad_error(sdp, msg, error); |
1514 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1515 | } else { | |
1516 | *timeo -= t; | |
1517 | } | |
1518 | } | |
1519 | ||
3d3c10f2 BM |
1520 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1521 | if (!sdp->sd_statfs_force_sync) { | |
1522 | sdp->sd_statfs_force_sync = 1; | |
1523 | wake_up(&sdp->sd_quota_wait); | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | ||
37b2c837 SW |
1528 | /** |
1529 | * gfs2_quotad - Write cached quota changes into the quota file | |
c551f66c | 1530 | * @data: Pointer to GFS2 superblock |
37b2c837 SW |
1531 | * |
1532 | */ | |
1533 | ||
1534 | int gfs2_quotad(void *data) | |
1535 | { | |
1536 | struct gfs2_sbd *sdp = data; | |
1537 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1538 | unsigned long statfs_timeo = 0; | |
1539 | unsigned long quotad_timeo = 0; | |
1540 | unsigned long t = 0; | |
1541 | DEFINE_WAIT(wait); | |
1542 | ||
1543 | while (!kthread_should_stop()) { | |
1544 | ||
601ef0d5 BP |
1545 | if (gfs2_withdrawn(sdp)) |
1546 | goto bypass; | |
37b2c837 | 1547 | /* Update the master statfs file */ |
3d3c10f2 BM |
1548 | if (sdp->sd_statfs_force_sync) { |
1549 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1550 | quotad_error(sdp, "statfs", error); | |
1551 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1552 | } | |
1553 | else | |
1554 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1555 | &statfs_timeo, | |
1556 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1557 | |
1558 | /* Update quota file */ | |
edd2e9ac | 1559 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1560 | "ad_timeo, &tune->gt_quota_quantum); |
1561 | ||
a0acae0e TH |
1562 | try_to_freeze(); |
1563 | ||
601ef0d5 | 1564 | bypass: |
37b2c837 SW |
1565 | t = min(quotad_timeo, statfs_timeo); |
1566 | ||
7fa5d20d | 1567 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
de3f906f | 1568 | if (!sdp->sd_statfs_force_sync) |
813e0c46 SW |
1569 | t -= schedule_timeout(t); |
1570 | else | |
1571 | t = 0; | |
37b2c837 SW |
1572 | finish_wait(&sdp->sd_quota_wait, &wait); |
1573 | } | |
1574 | ||
1575 | return 0; | |
1576 | } | |
1577 | ||
e54b2e2d | 1578 | static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state) |
1d371b5e SW |
1579 | { |
1580 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1581 | ||
e54b2e2d | 1582 | memset(state, 0, sizeof(*state)); |
ad6bb90f CH |
1583 | |
1584 | switch (sdp->sd_args.ar_quota) { | |
1585 | case GFS2_QUOTA_ON: | |
e54b2e2d JK |
1586 | state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; |
1587 | state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; | |
df561f66 | 1588 | fallthrough; |
ad6bb90f | 1589 | case GFS2_QUOTA_ACCOUNT: |
e54b2e2d JK |
1590 | state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED | |
1591 | QCI_SYSFILE; | |
1592 | state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED | | |
1593 | QCI_SYSFILE; | |
ad6bb90f CH |
1594 | break; |
1595 | case GFS2_QUOTA_OFF: | |
1596 | break; | |
1597 | } | |
1d371b5e | 1598 | if (sdp->sd_quota_inode) { |
e54b2e2d JK |
1599 | state->s_state[USRQUOTA].ino = |
1600 | GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1601 | state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks; | |
1d371b5e | 1602 | } |
e54b2e2d JK |
1603 | state->s_state[USRQUOTA].nextents = 1; /* unsupported */ |
1604 | state->s_state[GRPQUOTA] = state->s_state[USRQUOTA]; | |
1605 | state->s_incoredqs = list_lru_count(&gfs2_qd_lru); | |
1d371b5e SW |
1606 | return 0; |
1607 | } | |
1608 | ||
74a8a103 | 1609 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1610 | struct qc_dqblk *fdq) |
113d6b3c SW |
1611 | { |
1612 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1613 | struct gfs2_quota_lvb *qlvb; | |
1614 | struct gfs2_quota_data *qd; | |
1615 | struct gfs2_holder q_gh; | |
1616 | int error; | |
1617 | ||
14bf61ff | 1618 | memset(fdq, 0, sizeof(*fdq)); |
113d6b3c SW |
1619 | |
1620 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1621 | return -ESRCH; /* Crazy XFS error code */ | |
1622 | ||
236c64e4 EB |
1623 | if ((qid.type != USRQUOTA) && |
1624 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1625 | return -EINVAL; |
1626 | ||
05e0a60d | 1627 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1628 | if (error) |
1629 | return error; | |
1630 | error = do_glock(qd, FORCE, &q_gh); | |
1631 | if (error) | |
1632 | goto out; | |
1633 | ||
4e2f8849 | 1634 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
14bf61ff JK |
1635 | fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift; |
1636 | fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift; | |
1637 | fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift; | |
113d6b3c SW |
1638 | |
1639 | gfs2_glock_dq_uninit(&q_gh); | |
1640 | out: | |
1641 | qd_put(qd); | |
1642 | return error; | |
1643 | } | |
1644 | ||
e285c100 | 1645 | /* GFS2 only supports a subset of the XFS fields */ |
14bf61ff | 1646 | #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE) |
e285c100 | 1647 | |
74a8a103 | 1648 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1649 | struct qc_dqblk *fdq) |
e285c100 SW |
1650 | { |
1651 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1652 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1653 | struct gfs2_quota_data *qd; | |
1654 | struct gfs2_holder q_gh, i_gh; | |
1655 | unsigned int data_blocks, ind_blocks; | |
1656 | unsigned int blocks = 0; | |
1657 | int alloc_required; | |
e285c100 SW |
1658 | loff_t offset; |
1659 | int error; | |
1660 | ||
1661 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1662 | return -ESRCH; /* Crazy XFS error code */ | |
1663 | ||
236c64e4 EB |
1664 | if ((qid.type != USRQUOTA) && |
1665 | (qid.type != GRPQUOTA)) | |
e285c100 | 1666 | return -EINVAL; |
e285c100 SW |
1667 | |
1668 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1669 | return -EINVAL; | |
e285c100 | 1670 | |
05e0a60d | 1671 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1672 | if (error) |
1673 | return error; | |
1674 | ||
2fba46a0 | 1675 | error = gfs2_qa_get(ip); |
0a305e49 BP |
1676 | if (error) |
1677 | goto out_put; | |
1678 | ||
5955102c | 1679 | inode_lock(&ip->i_inode); |
e285c100 SW |
1680 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); |
1681 | if (error) | |
0a305e49 | 1682 | goto out_unlockput; |
e285c100 SW |
1683 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1684 | if (error) | |
1685 | goto out_q; | |
1686 | ||
1687 | /* Check for existing entry, if none then alloc new blocks */ | |
1688 | error = update_qd(sdp, qd); | |
1689 | if (error) | |
1690 | goto out_i; | |
1691 | ||
1692 | /* If nothing has changed, this is a no-op */ | |
14bf61ff JK |
1693 | if ((fdq->d_fieldmask & QC_SPC_SOFT) && |
1694 | ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) | |
1695 | fdq->d_fieldmask ^= QC_SPC_SOFT; | |
802ec9b6 | 1696 | |
14bf61ff JK |
1697 | if ((fdq->d_fieldmask & QC_SPC_HARD) && |
1698 | ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) | |
1699 | fdq->d_fieldmask ^= QC_SPC_HARD; | |
802ec9b6 | 1700 | |
14bf61ff JK |
1701 | if ((fdq->d_fieldmask & QC_SPACE) && |
1702 | ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1703 | fdq->d_fieldmask ^= QC_SPACE; | |
802ec9b6 | 1704 | |
e285c100 SW |
1705 | if (fdq->d_fieldmask == 0) |
1706 | goto out_i; | |
1707 | ||
1708 | offset = qd2offset(qd); | |
461cb419 | 1709 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1710 | if (gfs2_is_stuffed(ip)) |
1711 | alloc_required = 1; | |
e285c100 | 1712 | if (alloc_required) { |
7b9cff46 | 1713 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1714 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1715 | &data_blocks, &ind_blocks); | |
564e12b1 | 1716 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1717 | ap.target = blocks; |
1718 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1719 | if (error) |
564e12b1 | 1720 | goto out_i; |
71f890f7 | 1721 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1722 | } |
1723 | ||
e79a46a0 AD |
1724 | /* Some quotas span block boundaries and can update two blocks, |
1725 | adding an extra block to the transaction to handle such quotas */ | |
1726 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1727 | if (error) |
1728 | goto out_release; | |
1729 | ||
1730 | /* Apply changes */ | |
1731 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
9cde2898 AD |
1732 | if (!error) |
1733 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
e285c100 SW |
1734 | |
1735 | gfs2_trans_end(sdp); | |
1736 | out_release: | |
564e12b1 | 1737 | if (alloc_required) |
e285c100 | 1738 | gfs2_inplace_release(ip); |
e285c100 SW |
1739 | out_i: |
1740 | gfs2_glock_dq_uninit(&i_gh); | |
1741 | out_q: | |
1742 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1743 | out_unlockput: |
2fba46a0 | 1744 | gfs2_qa_put(ip); |
5955102c | 1745 | inode_unlock(&ip->i_inode); |
0a305e49 | 1746 | out_put: |
e285c100 SW |
1747 | qd_put(qd); |
1748 | return error; | |
1749 | } | |
1750 | ||
cc632e7f SW |
1751 | const struct quotactl_ops gfs2_quotactl_ops = { |
1752 | .quota_sync = gfs2_quota_sync, | |
e54b2e2d | 1753 | .get_state = gfs2_quota_get_state, |
b9b2dd36 | 1754 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1755 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1756 | }; |
c754fbbb SW |
1757 | |
1758 | void __init gfs2_quota_hash_init(void) | |
1759 | { | |
1760 | unsigned i; | |
1761 | ||
1762 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1763 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1764 | } |