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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 4 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
7 | /* | |
8 | * Quota change tags are associated with each transaction that allocates or | |
9 | * deallocates space. Those changes are accumulated locally to each node (in a | |
10 | * per-node file) and then are periodically synced to the quota file. This | |
11 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
12 | * fuzziness in the current usage value of IDs that are being used on different | |
13 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
14 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 15 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
16 | * program to be run on node crashes or anything like that. |
17 | * | |
18 | * There are couple of knobs that let the administrator manage the quota | |
19 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
20 | * sitting on one node before being synced to the quota file. (The default is | |
21 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
22 | * of quota file syncs increases as the user moves closer to their limit. The | |
23 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
24 | * means that there is more contention between the nodes for the quota file. | |
25 | * The default value is one. This sets the maximum theoretical quota overrun | |
26 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
27 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
28 | * number greater than one makes quota syncs more frequent and reduces the | |
29 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
30 | * syncs less frequent. | |
31 | * | |
32 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
33 | * the quota file, so it is not being constantly read. | |
34 | */ | |
35 | ||
d77d1b58 JP |
36 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
37 | ||
b3b94faa DT |
38 | #include <linux/sched.h> |
39 | #include <linux/slab.h> | |
1495f230 | 40 | #include <linux/mm.h> |
b3b94faa DT |
41 | #include <linux/spinlock.h> |
42 | #include <linux/completion.h> | |
43 | #include <linux/buffer_head.h> | |
b3b94faa | 44 | #include <linux/sort.h> |
18ec7d5c | 45 | #include <linux/fs.h> |
2e565bb6 | 46 | #include <linux/bio.h> |
5c676f6d | 47 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
48 | #include <linux/kthread.h> |
49 | #include <linux/freezer.h> | |
2ec46505 | 50 | #include <linux/quota.h> |
1d371b5e | 51 | #include <linux/dqblk_xfs.h> |
9b9f039d | 52 | #include <linux/lockref.h> |
2147dbfd | 53 | #include <linux/list_lru.h> |
c754fbbb SW |
54 | #include <linux/rcupdate.h> |
55 | #include <linux/rculist_bl.h> | |
56 | #include <linux/bit_spinlock.h> | |
57 | #include <linux/jhash.h> | |
1e3d3620 | 58 | #include <linux/vmalloc.h> |
b3b94faa DT |
59 | |
60 | #include "gfs2.h" | |
5c676f6d | 61 | #include "incore.h" |
b3b94faa DT |
62 | #include "bmap.h" |
63 | #include "glock.h" | |
64 | #include "glops.h" | |
b3b94faa DT |
65 | #include "log.h" |
66 | #include "meta_io.h" | |
67 | #include "quota.h" | |
68 | #include "rgrp.h" | |
69 | #include "super.h" | |
70 | #include "trans.h" | |
18ec7d5c | 71 | #include "inode.h" |
5c676f6d | 72 | #include "util.h" |
b3b94faa | 73 | |
c754fbbb | 74 | #define GFS2_QD_HASH_SHIFT 12 |
47a9a527 | 75 | #define GFS2_QD_HASH_SIZE BIT(GFS2_QD_HASH_SHIFT) |
c754fbbb SW |
76 | #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1) |
77 | ||
432928c9 BP |
78 | #define QC_CHANGE 0 |
79 | #define QC_SYNC 1 | |
80 | ||
c754fbbb | 81 | /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */ |
2d9e7230 | 82 | /* -> sd_bitmap_lock */ |
7d80823e | 83 | static DEFINE_SPINLOCK(qd_lock); |
2147dbfd | 84 | struct list_lru gfs2_qd_lru; |
0a7ab79c | 85 | |
c754fbbb SW |
86 | static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE]; |
87 | ||
88 | static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp, | |
89 | const struct kqid qid) | |
90 | { | |
91 | unsigned int h; | |
92 | ||
93 | h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0); | |
94 | h = jhash(&qid, sizeof(struct kqid), h); | |
95 | ||
96 | return h & GFS2_QD_HASH_MASK; | |
97 | } | |
98 | ||
99 | static inline void spin_lock_bucket(unsigned int hash) | |
100 | { | |
101 | hlist_bl_lock(&qd_hash_table[hash]); | |
102 | } | |
103 | ||
104 | static inline void spin_unlock_bucket(unsigned int hash) | |
105 | { | |
106 | hlist_bl_unlock(&qd_hash_table[hash]); | |
107 | } | |
108 | ||
109 | static void gfs2_qd_dealloc(struct rcu_head *rcu) | |
110 | { | |
111 | struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu); | |
a475c5dd AG |
112 | struct gfs2_sbd *sdp = qd->qd_sbd; |
113 | ||
c754fbbb | 114 | kmem_cache_free(gfs2_quotad_cachep, qd); |
a475c5dd AG |
115 | if (atomic_dec_and_test(&sdp->sd_quota_count)) |
116 | wake_up(&sdp->sd_kill_wait); | |
c754fbbb SW |
117 | } |
118 | ||
faada74a | 119 | static void gfs2_qd_dispose(struct gfs2_quota_data *qd) |
0a7ab79c | 120 | { |
faada74a | 121 | struct gfs2_sbd *sdp = qd->qd_sbd; |
0a7ab79c | 122 | |
faada74a AG |
123 | spin_lock(&qd_lock); |
124 | list_del(&qd->qd_list); | |
125 | spin_unlock(&qd_lock); | |
0a7ab79c | 126 | |
faada74a AG |
127 | spin_lock_bucket(qd->qd_hash); |
128 | hlist_bl_del_rcu(&qd->qd_hlist); | |
129 | spin_unlock_bucket(qd->qd_hash); | |
2147dbfd | 130 | |
fae2e73a AG |
131 | if (!gfs2_withdrawn(sdp)) { |
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 | } | |
0a7ab79c | 136 | |
faada74a AG |
137 | gfs2_glock_put(qd->qd_gl); |
138 | call_rcu(&qd->qd_rcu, gfs2_qd_dealloc); | |
139 | } | |
c754fbbb | 140 | |
faada74a AG |
141 | static void gfs2_qd_list_dispose(struct list_head *list) |
142 | { | |
143 | struct gfs2_quota_data *qd; | |
0a7ab79c | 144 | |
faada74a AG |
145 | while (!list_empty(list)) { |
146 | qd = list_first_entry(list, struct gfs2_quota_data, qd_lru); | |
147 | list_del(&qd->qd_lru); | |
0a7ab79c | 148 | |
faada74a | 149 | gfs2_qd_dispose(qd); |
0a7ab79c | 150 | } |
2147dbfd SW |
151 | } |
152 | ||
153 | ||
3f97b163 VD |
154 | static enum lru_status gfs2_qd_isolate(struct list_head *item, |
155 | struct list_lru_one *lru, spinlock_t *lru_lock, void *arg) | |
2147dbfd SW |
156 | { |
157 | struct list_head *dispose = arg; | |
6b0e9a5f AG |
158 | struct gfs2_quota_data *qd = |
159 | list_entry(item, struct gfs2_quota_data, qd_lru); | |
160 | enum lru_status status; | |
2147dbfd SW |
161 | |
162 | if (!spin_trylock(&qd->qd_lockref.lock)) | |
163 | return LRU_SKIP; | |
164 | ||
6b0e9a5f | 165 | status = LRU_SKIP; |
2147dbfd SW |
166 | if (qd->qd_lockref.count == 0) { |
167 | lockref_mark_dead(&qd->qd_lockref); | |
3f97b163 | 168 | list_lru_isolate_move(lru, &qd->qd_lru, dispose); |
6b0e9a5f | 169 | status = LRU_REMOVED; |
2147dbfd SW |
170 | } |
171 | ||
172 | spin_unlock(&qd->qd_lockref.lock); | |
6b0e9a5f | 173 | return status; |
2147dbfd SW |
174 | } |
175 | ||
176 | static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, | |
177 | struct shrink_control *sc) | |
178 | { | |
179 | LIST_HEAD(dispose); | |
180 | unsigned long freed; | |
181 | ||
182 | if (!(sc->gfp_mask & __GFP_FS)) | |
183 | return SHRINK_STOP; | |
184 | ||
503c358c VD |
185 | freed = list_lru_shrink_walk(&gfs2_qd_lru, sc, |
186 | gfs2_qd_isolate, &dispose); | |
2147dbfd | 187 | |
faada74a | 188 | gfs2_qd_list_dispose(&dispose); |
2147dbfd | 189 | |
1ab6c499 DC |
190 | return freed; |
191 | } | |
0a7ab79c | 192 | |
2147dbfd SW |
193 | static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
194 | struct shrink_control *sc) | |
1ab6c499 | 195 | { |
503c358c | 196 | return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); |
0a7ab79c AD |
197 | } |
198 | ||
2147dbfd SW |
199 | struct shrinker gfs2_qd_shrinker = { |
200 | .count_objects = gfs2_qd_shrink_count, | |
201 | .scan_objects = gfs2_qd_shrink_scan, | |
202 | .seeks = DEFAULT_SEEKS, | |
203 | .flags = SHRINKER_NUMA_AWARE, | |
204 | }; | |
205 | ||
206 | ||
2f6c9896 EB |
207 | static u64 qd2index(struct gfs2_quota_data *qd) |
208 | { | |
05e0a60d EB |
209 | struct kqid qid = qd->qd_id; |
210 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 211 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
212 | } |
213 | ||
cd915493 | 214 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 215 | { |
cd915493 | 216 | u64 offset; |
b3b94faa | 217 | |
2f6c9896 | 218 | offset = qd2index(qd); |
b3b94faa DT |
219 | offset *= sizeof(struct gfs2_quota); |
220 | ||
221 | return offset; | |
222 | } | |
223 | ||
c754fbbb | 224 | static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
225 | { |
226 | struct gfs2_quota_data *qd; | |
227 | int error; | |
228 | ||
37b2c837 | 229 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa | 230 | if (!qd) |
c754fbbb | 231 | return NULL; |
b3b94faa | 232 | |
c754fbbb | 233 | qd->qd_sbd = sdp; |
bb73ae8f | 234 | qd->qd_lockref.count = 0; |
9b9f039d | 235 | spin_lock_init(&qd->qd_lockref.lock); |
05e0a60d | 236 | qd->qd_id = qid; |
b3b94faa | 237 | qd->qd_slot = -1; |
2147dbfd | 238 | INIT_LIST_HEAD(&qd->qd_lru); |
c754fbbb | 239 | qd->qd_hash = hash; |
b3b94faa | 240 | |
2f6c9896 | 241 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
242 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
243 | if (error) | |
244 | goto fail; | |
245 | ||
c754fbbb | 246 | return qd; |
b3b94faa | 247 | |
a91ea69f | 248 | fail: |
37b2c837 | 249 | kmem_cache_free(gfs2_quotad_cachep, qd); |
c754fbbb | 250 | return NULL; |
b3b94faa DT |
251 | } |
252 | ||
c754fbbb SW |
253 | static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash, |
254 | const struct gfs2_sbd *sdp, | |
255 | struct kqid qid) | |
b3b94faa | 256 | { |
c754fbbb SW |
257 | struct gfs2_quota_data *qd; |
258 | struct hlist_bl_node *h; | |
b3b94faa | 259 | |
c754fbbb SW |
260 | hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) { |
261 | if (!qid_eq(qd->qd_id, qid)) | |
262 | continue; | |
263 | if (qd->qd_sbd != sdp) | |
264 | continue; | |
265 | if (lockref_get_not_dead(&qd->qd_lockref)) { | |
266 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); | |
267 | return qd; | |
b3b94faa | 268 | } |
c754fbbb | 269 | } |
b3b94faa | 270 | |
c754fbbb SW |
271 | return NULL; |
272 | } | |
b3b94faa | 273 | |
b3b94faa | 274 | |
c754fbbb SW |
275 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
276 | struct gfs2_quota_data **qdp) | |
277 | { | |
278 | struct gfs2_quota_data *qd, *new_qd; | |
279 | unsigned int hash = gfs2_qd_hash(sdp, qid); | |
b3b94faa | 280 | |
c754fbbb SW |
281 | rcu_read_lock(); |
282 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
283 | rcu_read_unlock(); | |
b3b94faa | 284 | |
c754fbbb SW |
285 | if (qd) |
286 | return 0; | |
287 | ||
288 | new_qd = qd_alloc(hash, sdp, qid); | |
289 | if (!new_qd) | |
290 | return -ENOMEM; | |
291 | ||
292 | spin_lock(&qd_lock); | |
293 | spin_lock_bucket(hash); | |
294 | *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid); | |
295 | if (qd == NULL) { | |
bb73ae8f | 296 | new_qd->qd_lockref.count++; |
c754fbbb SW |
297 | *qdp = new_qd; |
298 | list_add(&new_qd->qd_list, &sdp->sd_quota_list); | |
299 | hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]); | |
300 | atomic_inc(&sdp->sd_quota_count); | |
301 | } | |
302 | spin_unlock_bucket(hash); | |
303 | spin_unlock(&qd_lock); | |
304 | ||
305 | if (qd) { | |
306 | gfs2_glock_put(new_qd->qd_gl); | |
307 | kmem_cache_free(gfs2_quotad_cachep, new_qd); | |
b3b94faa | 308 | } |
c754fbbb SW |
309 | |
310 | return 0; | |
b3b94faa DT |
311 | } |
312 | ||
c754fbbb | 313 | |
b3b94faa DT |
314 | static void qd_hold(struct gfs2_quota_data *qd) |
315 | { | |
481f6e7d | 316 | struct gfs2_sbd *sdp = qd->qd_sbd; |
9b9f039d SW |
317 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
318 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
319 | } |
320 | ||
321 | static void qd_put(struct gfs2_quota_data *qd) | |
322 | { | |
a475c5dd AG |
323 | struct gfs2_sbd *sdp; |
324 | ||
2147dbfd SW |
325 | if (lockref_put_or_lock(&qd->qd_lockref)) |
326 | return; | |
9b9f039d | 327 | |
a475c5dd AG |
328 | BUG_ON(__lockref_is_dead(&qd->qd_lockref)); |
329 | sdp = qd->qd_sbd; | |
330 | if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) { | |
331 | lockref_mark_dead(&qd->qd_lockref); | |
332 | spin_unlock(&qd->qd_lockref.lock); | |
333 | ||
334 | gfs2_qd_dispose(qd); | |
335 | return; | |
336 | } | |
337 | ||
2147dbfd SW |
338 | qd->qd_lockref.count = 0; |
339 | list_lru_add(&gfs2_qd_lru, &qd->qd_lru); | |
340 | spin_unlock(&qd->qd_lockref.lock); | |
b3b94faa DT |
341 | } |
342 | ||
343 | static int slot_get(struct gfs2_quota_data *qd) | |
344 | { | |
ee2411a8 SW |
345 | struct gfs2_sbd *sdp = qd->qd_sbd; |
346 | unsigned int bit; | |
347 | int error = 0; | |
b3b94faa | 348 | |
2d9e7230 | 349 | spin_lock(&sdp->sd_bitmap_lock); |
ee2411a8 SW |
350 | if (qd->qd_slot_count != 0) |
351 | goto out; | |
b3b94faa | 352 | |
ee2411a8 SW |
353 | error = -ENOSPC; |
354 | bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots); | |
355 | if (bit < sdp->sd_quota_slots) { | |
356 | set_bit(bit, sdp->sd_quota_bitmap); | |
357 | qd->qd_slot = bit; | |
e9fb7c73 | 358 | error = 0; |
ee2411a8 SW |
359 | out: |
360 | qd->qd_slot_count++; | |
b3b94faa | 361 | } |
2d9e7230 | 362 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa | 363 | |
ee2411a8 | 364 | return error; |
b3b94faa DT |
365 | } |
366 | ||
367 | static void slot_hold(struct gfs2_quota_data *qd) | |
368 | { | |
ee2411a8 | 369 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 370 | |
2d9e7230 | 371 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
372 | gfs2_assert(sdp, qd->qd_slot_count); |
373 | qd->qd_slot_count++; | |
2d9e7230 | 374 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
375 | } |
376 | ||
377 | static void slot_put(struct gfs2_quota_data *qd) | |
378 | { | |
ee2411a8 | 379 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 380 | |
2d9e7230 | 381 | spin_lock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
382 | gfs2_assert(sdp, qd->qd_slot_count); |
383 | if (!--qd->qd_slot_count) { | |
ee2411a8 | 384 | BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
385 | qd->qd_slot = -1; |
386 | } | |
2d9e7230 | 387 | spin_unlock(&sdp->sd_bitmap_lock); |
b3b94faa DT |
388 | } |
389 | ||
390 | static int bh_get(struct gfs2_quota_data *qd) | |
391 | { | |
481f6e7d | 392 | struct gfs2_sbd *sdp = qd->qd_sbd; |
c360abbb BP |
393 | struct inode *inode = sdp->sd_qc_inode; |
394 | struct gfs2_inode *ip = GFS2_I(inode); | |
b3b94faa | 395 | unsigned int block, offset; |
b3b94faa | 396 | struct buffer_head *bh; |
c360abbb | 397 | struct iomap iomap = { }; |
b3b94faa DT |
398 | int error; |
399 | ||
f55ab26a | 400 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
401 | |
402 | if (qd->qd_bh_count++) { | |
f55ab26a | 403 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
404 | return 0; |
405 | } | |
406 | ||
407 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 408 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 409 | |
c360abbb BP |
410 | error = gfs2_iomap_get(inode, |
411 | (loff_t)block << inode->i_blkbits, | |
412 | i_blocksize(inode), &iomap); | |
b3b94faa DT |
413 | if (error) |
414 | goto fail; | |
c360abbb BP |
415 | error = -ENOENT; |
416 | if (iomap.type != IOMAP_MAPPED) | |
417 | goto fail; | |
418 | ||
419 | error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits, | |
420 | DIO_WAIT, 0, &bh); | |
b3b94faa DT |
421 | if (error) |
422 | goto fail; | |
423 | error = -EIO; | |
424 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
425 | goto fail_brelse; | |
426 | ||
427 | qd->qd_bh = bh; | |
428 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
429 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
430 | offset * sizeof(struct gfs2_quota_change)); | |
431 | ||
2e95b665 | 432 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
433 | |
434 | return 0; | |
435 | ||
a91ea69f | 436 | fail_brelse: |
b3b94faa | 437 | brelse(bh); |
a91ea69f | 438 | fail: |
b3b94faa | 439 | qd->qd_bh_count--; |
f55ab26a | 440 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
441 | return error; |
442 | } | |
443 | ||
444 | static void bh_put(struct gfs2_quota_data *qd) | |
445 | { | |
481f6e7d | 446 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 447 | |
f55ab26a | 448 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
449 | gfs2_assert(sdp, qd->qd_bh_count); |
450 | if (!--qd->qd_bh_count) { | |
451 | brelse(qd->qd_bh); | |
452 | qd->qd_bh = NULL; | |
453 | qd->qd_bh_qc = NULL; | |
454 | } | |
f55ab26a | 455 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
456 | } |
457 | ||
1bf59bf6 SW |
458 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
459 | u64 *sync_gen) | |
460 | { | |
461 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
462 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
463 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
464 | return 0; | |
465 | ||
2147dbfd SW |
466 | if (!lockref_get_not_dead(&qd->qd_lockref)) |
467 | return 0; | |
1bf59bf6 | 468 | |
2147dbfd | 469 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
1bf59bf6 | 470 | set_bit(QDF_LOCKED, &qd->qd_flags); |
1bf59bf6 | 471 | qd->qd_change_sync = qd->qd_change; |
2d9e7230 | 472 | slot_hold(qd); |
1bf59bf6 SW |
473 | return 1; |
474 | } | |
475 | ||
b3b94faa DT |
476 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
477 | { | |
b846f2d7 | 478 | struct gfs2_quota_data *qd = NULL, *iter; |
b3b94faa | 479 | int error; |
b3b94faa DT |
480 | |
481 | *qdp = NULL; | |
482 | ||
bc98a42c | 483 | if (sb_rdonly(sdp->sd_vfs)) |
b3b94faa DT |
484 | return 0; |
485 | ||
7d80823e | 486 | spin_lock(&qd_lock); |
b3b94faa | 487 | |
b846f2d7 JK |
488 | list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) { |
489 | if (qd_check_sync(sdp, iter, &sdp->sd_quota_sync_gen)) { | |
490 | qd = iter; | |
1bf59bf6 | 491 | break; |
b846f2d7 | 492 | } |
b3b94faa DT |
493 | } |
494 | ||
7d80823e | 495 | spin_unlock(&qd_lock); |
b3b94faa DT |
496 | |
497 | if (qd) { | |
b3b94faa DT |
498 | error = bh_get(qd); |
499 | if (error) { | |
500 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
501 | slot_put(qd); | |
502 | qd_put(qd); | |
503 | return error; | |
504 | } | |
505 | } | |
506 | ||
507 | *qdp = qd; | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
b3b94faa DT |
512 | static void qd_unlock(struct gfs2_quota_data *qd) |
513 | { | |
481f6e7d | 514 | gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags)); |
b3b94faa DT |
515 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
516 | bh_put(qd); | |
517 | slot_put(qd); | |
518 | qd_put(qd); | |
519 | } | |
520 | ||
b59c8b6f | 521 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
522 | struct gfs2_quota_data **qdp) |
523 | { | |
524 | int error; | |
525 | ||
05e0a60d | 526 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
527 | if (error) |
528 | return error; | |
529 | ||
530 | error = slot_get(*qdp); | |
531 | if (error) | |
532 | goto fail; | |
533 | ||
534 | error = bh_get(*qdp); | |
535 | if (error) | |
536 | goto fail_slot; | |
537 | ||
538 | return 0; | |
539 | ||
a91ea69f | 540 | fail_slot: |
b3b94faa | 541 | slot_put(*qdp); |
a91ea69f | 542 | fail: |
b3b94faa DT |
543 | qd_put(*qdp); |
544 | return error; | |
545 | } | |
546 | ||
547 | static void qdsb_put(struct gfs2_quota_data *qd) | |
548 | { | |
549 | bh_put(qd); | |
550 | slot_put(qd); | |
551 | qd_put(qd); | |
552 | } | |
553 | ||
b54e9a0b | 554 | /** |
2fba46a0 BP |
555 | * gfs2_qa_get - make sure we have a quota allocations data structure, |
556 | * if necessary | |
b54e9a0b BP |
557 | * @ip: the inode for this reservation |
558 | */ | |
2fba46a0 | 559 | int gfs2_qa_get(struct gfs2_inode *ip) |
b54e9a0b | 560 | { |
b54e9a0b | 561 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5fcff61e | 562 | struct inode *inode = &ip->i_inode; |
b54e9a0b BP |
563 | |
564 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
565 | return 0; | |
566 | ||
5fcff61e | 567 | spin_lock(&inode->i_lock); |
b54e9a0b | 568 | if (ip->i_qadata == NULL) { |
5fcff61e BP |
569 | struct gfs2_qadata *tmp; |
570 | ||
571 | spin_unlock(&inode->i_lock); | |
572 | tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS); | |
573 | if (!tmp) | |
574 | return -ENOMEM; | |
575 | ||
576 | spin_lock(&inode->i_lock); | |
577 | if (ip->i_qadata == NULL) | |
578 | ip->i_qadata = tmp; | |
579 | else | |
580 | kmem_cache_free(gfs2_qadata_cachep, tmp); | |
b54e9a0b | 581 | } |
2fba46a0 | 582 | ip->i_qadata->qa_ref++; |
5fcff61e BP |
583 | spin_unlock(&inode->i_lock); |
584 | return 0; | |
b54e9a0b BP |
585 | } |
586 | ||
2fba46a0 | 587 | void gfs2_qa_put(struct gfs2_inode *ip) |
b54e9a0b | 588 | { |
5fcff61e BP |
589 | struct inode *inode = &ip->i_inode; |
590 | ||
591 | spin_lock(&inode->i_lock); | |
2fba46a0 | 592 | if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) { |
b54e9a0b BP |
593 | kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata); |
594 | ip->i_qadata = NULL; | |
595 | } | |
5fcff61e | 596 | spin_unlock(&inode->i_lock); |
b54e9a0b BP |
597 | } |
598 | ||
7c06b5d6 | 599 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 600 | { |
feaa7bba | 601 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 602 | struct gfs2_quota_data **qd; |
b3b94faa DT |
603 | int error; |
604 | ||
b54e9a0b BP |
605 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
606 | return 0; | |
607 | ||
2fba46a0 BP |
608 | error = gfs2_qa_get(ip); |
609 | if (error) | |
610 | return error; | |
5407e242 | 611 | |
b54e9a0b | 612 | qd = ip->i_qadata->qa_qd; |
5407e242 | 613 | |
b54e9a0b | 614 | if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) || |
2fba46a0 BP |
615 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) { |
616 | error = -EIO; | |
dac0fc31 | 617 | gfs2_qa_put(ip); |
2fba46a0 BP |
618 | goto out; |
619 | } | |
b3b94faa | 620 | |
b59c8b6f | 621 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa | 622 | if (error) |
2fba46a0 | 623 | goto out_unhold; |
b54e9a0b | 624 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
625 | qd++; |
626 | ||
b59c8b6f | 627 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa | 628 | if (error) |
2fba46a0 | 629 | goto out_unhold; |
b54e9a0b | 630 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
631 | qd++; |
632 | ||
6b24c0d2 EB |
633 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
634 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 635 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa | 636 | if (error) |
2fba46a0 | 637 | goto out_unhold; |
b54e9a0b | 638 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
639 | qd++; |
640 | } | |
641 | ||
6b24c0d2 EB |
642 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
643 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 644 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa | 645 | if (error) |
2fba46a0 | 646 | goto out_unhold; |
b54e9a0b | 647 | ip->i_qadata->qa_qd_num++; |
b3b94faa DT |
648 | qd++; |
649 | } | |
650 | ||
2fba46a0 | 651 | out_unhold: |
b3b94faa DT |
652 | if (error) |
653 | gfs2_quota_unhold(ip); | |
2fba46a0 | 654 | out: |
b3b94faa DT |
655 | return error; |
656 | } | |
657 | ||
658 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
659 | { | |
feaa7bba | 660 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b58bf407 | 661 | u32 x; |
b3b94faa | 662 | |
b54e9a0b | 663 | if (ip->i_qadata == NULL) |
5407e242 | 664 | return; |
2fba46a0 | 665 | |
b3b94faa DT |
666 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
667 | ||
b54e9a0b BP |
668 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
669 | qdsb_put(ip->i_qadata->qa_qd[x]); | |
670 | ip->i_qadata->qa_qd[x] = NULL; | |
b3b94faa | 671 | } |
b54e9a0b | 672 | ip->i_qadata->qa_qd_num = 0; |
2fba46a0 | 673 | gfs2_qa_put(ip); |
b3b94faa DT |
674 | } |
675 | ||
676 | static int sort_qd(const void *a, const void *b) | |
677 | { | |
48fac179 SW |
678 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
679 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 680 | |
05e0a60d | 681 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 682 | return -1; |
05e0a60d | 683 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 684 | return 1; |
48fac179 | 685 | return 0; |
b3b94faa DT |
686 | } |
687 | ||
432928c9 | 688 | static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type) |
b3b94faa | 689 | { |
481f6e7d | 690 | struct gfs2_sbd *sdp = qd->qd_sbd; |
feaa7bba | 691 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 692 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 693 | s64 x; |
b3b94faa | 694 | |
f55ab26a | 695 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 696 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
697 | |
698 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
699 | qc->qc_change = 0; | |
700 | qc->qc_flags = 0; | |
05e0a60d | 701 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 702 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 703 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
704 | } |
705 | ||
b44b84d7 | 706 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
707 | qc->qc_change = cpu_to_be64(x); |
708 | ||
7d80823e | 709 | spin_lock(&qd_lock); |
b3b94faa | 710 | qd->qd_change = x; |
7d80823e | 711 | spin_unlock(&qd_lock); |
b3b94faa | 712 | |
432928c9 BP |
713 | if (qc_type == QC_CHANGE) { |
714 | if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
715 | qd_hold(qd); | |
716 | slot_hold(qd); | |
717 | } | |
718 | } else { | |
b3b94faa DT |
719 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); |
720 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
721 | qc->qc_flags = 0; | |
722 | qc->qc_id = 0; | |
723 | slot_put(qd); | |
724 | qd_put(qd); | |
b3b94faa | 725 | } |
907b9bce | 726 | |
9cde2898 AD |
727 | if (change < 0) /* Reset quiet flag if we freed some blocks */ |
728 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
f55ab26a | 729 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
730 | } |
731 | ||
d96dad27 | 732 | static int gfs2_write_buf_to_page(struct gfs2_sbd *sdp, unsigned long index, |
39a72580 AD |
733 | unsigned off, void *buf, unsigned bytes) |
734 | { | |
d96dad27 | 735 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
39a72580 | 736 | struct inode *inode = &ip->i_inode; |
39a72580 AD |
737 | struct address_space *mapping = inode->i_mapping; |
738 | struct page *page; | |
739 | struct buffer_head *bh; | |
39a72580 AD |
740 | u64 blk; |
741 | unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0; | |
742 | unsigned to_write = bytes, pg_off = off; | |
39a72580 | 743 | |
09cbfeaf | 744 | blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift); |
39a72580 AD |
745 | boff = off % bsize; |
746 | ||
111c7d27 | 747 | page = grab_cache_page(mapping, index); |
39a72580 AD |
748 | if (!page) |
749 | return -ENOMEM; | |
750 | if (!page_has_buffers(page)) | |
751 | create_empty_buffers(page, bsize, 0); | |
752 | ||
753 | bh = page_buffers(page); | |
f0418e4b | 754 | for(;;) { |
39a72580 AD |
755 | /* Find the beginning block within the page */ |
756 | if (pg_off >= ((bnum * bsize) + bsize)) { | |
757 | bh = bh->b_this_page; | |
758 | bnum++; | |
759 | blk++; | |
760 | continue; | |
761 | } | |
762 | if (!buffer_mapped(bh)) { | |
763 | gfs2_block_map(inode, blk, bh, 1); | |
764 | if (!buffer_mapped(bh)) | |
765 | goto unlock_out; | |
766 | /* If it's a newly allocated disk block, zero it */ | |
767 | if (buffer_new(bh)) | |
768 | zero_user(page, bnum * bsize, bh->b_size); | |
769 | } | |
770 | if (PageUptodate(page)) | |
771 | set_buffer_uptodate(bh); | |
86a020cc ZY |
772 | if (bh_read(bh, REQ_META | REQ_PRIO) < 0) |
773 | goto unlock_out; | |
768963ab | 774 | gfs2_trans_add_data(ip->i_gl, bh); |
39a72580 AD |
775 | |
776 | /* If we need to write to the next block as well */ | |
777 | if (to_write > (bsize - boff)) { | |
778 | pg_off += (bsize - boff); | |
779 | to_write -= (bsize - boff); | |
780 | boff = pg_off % bsize; | |
781 | continue; | |
782 | } | |
f0418e4b | 783 | break; |
39a72580 AD |
784 | } |
785 | ||
786 | /* Write to the page, now that we have setup the buffer(s) */ | |
d68d0c6c | 787 | memcpy_to_page(page, off, buf, bytes); |
39a72580 | 788 | flush_dcache_page(page); |
39a72580 | 789 | unlock_page(page); |
09cbfeaf | 790 | put_page(page); |
39a72580 AD |
791 | |
792 | return 0; | |
793 | ||
794 | unlock_out: | |
795 | unlock_page(page); | |
09cbfeaf | 796 | put_page(page); |
39a72580 AD |
797 | return -EIO; |
798 | } | |
799 | ||
adfd2b5e | 800 | static int gfs2_write_disk_quota(struct gfs2_sbd *sdp, struct gfs2_quota *qp, |
39a72580 AD |
801 | loff_t loc) |
802 | { | |
803 | unsigned long pg_beg; | |
804 | unsigned pg_off, nbytes, overflow = 0; | |
e34c16c9 | 805 | int error; |
39a72580 AD |
806 | void *ptr; |
807 | ||
808 | nbytes = sizeof(struct gfs2_quota); | |
809 | ||
09cbfeaf | 810 | pg_beg = loc >> PAGE_SHIFT; |
45eb0504 | 811 | pg_off = offset_in_page(loc); |
39a72580 AD |
812 | |
813 | /* If the quota straddles a page boundary, split the write in two */ | |
e34c16c9 | 814 | if ((pg_off + nbytes) > PAGE_SIZE) |
09cbfeaf | 815 | overflow = (pg_off + nbytes) - PAGE_SIZE; |
39a72580 AD |
816 | |
817 | ptr = qp; | |
d96dad27 | 818 | error = gfs2_write_buf_to_page(sdp, pg_beg, pg_off, ptr, |
39a72580 AD |
819 | nbytes - overflow); |
820 | /* If there's an overflow, write the remaining bytes to the next page */ | |
e34c16c9 | 821 | if (!error && overflow) |
d96dad27 | 822 | error = gfs2_write_buf_to_page(sdp, pg_beg + 1, 0, |
39a72580 AD |
823 | ptr + nbytes - overflow, |
824 | overflow); | |
825 | return error; | |
826 | } | |
827 | ||
18ec7d5c | 828 | /** |
1e72c0f7 | 829 | * gfs2_adjust_quota - adjust record of current block usage |
ee1768e4 | 830 | * @sdp: The superblock |
1e72c0f7 | 831 | * @loc: Offset of the entry in the quota file |
e285c100 | 832 | * @change: The amount of usage change to record |
1e72c0f7 | 833 | * @qd: The quota data |
e285c100 | 834 | * @fdq: The updated limits to record |
18ec7d5c SW |
835 | * |
836 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
837 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
838 | * |
839 | * Returns: 0 or -ve on error | |
18ec7d5c | 840 | */ |
1e72c0f7 | 841 | |
ee1768e4 | 842 | static int gfs2_adjust_quota(struct gfs2_sbd *sdp, loff_t loc, |
e285c100 | 843 | s64 change, struct gfs2_quota_data *qd, |
14bf61ff | 844 | struct qc_dqblk *fdq) |
18ec7d5c | 845 | { |
ee1768e4 | 846 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
feaa7bba | 847 | struct inode *inode = &ip->i_inode; |
951b4bd5 | 848 | struct gfs2_quota q; |
39a72580 | 849 | int err; |
e285c100 | 850 | u64 size; |
18ec7d5c | 851 | |
891a8e93 | 852 | if (gfs2_is_stuffed(ip)) { |
7a607a41 | 853 | err = gfs2_unstuff_dinode(ip); |
891a8e93 SW |
854 | if (err) |
855 | return err; | |
856 | } | |
7e619bc3 AD |
857 | |
858 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 859 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
860 | if (err < 0) |
861 | return err; | |
862 | ||
39a72580 | 863 | loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */ |
7e619bc3 | 864 | err = -EIO; |
951b4bd5 | 865 | be64_add_cpu(&q.qu_value, change); |
1bdf4535 | 866 | if (((s64)be64_to_cpu(q.qu_value)) < 0) |
39a72580 | 867 | q.qu_value = 0; /* Never go negative on quota usage */ |
951b4bd5 | 868 | qd->qd_qb.qb_value = q.qu_value; |
7e619bc3 | 869 | if (fdq) { |
14bf61ff JK |
870 | if (fdq->d_fieldmask & QC_SPC_SOFT) { |
871 | q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 872 | qd->qd_qb.qb_warn = q.qu_warn; |
7e619bc3 | 873 | } |
14bf61ff JK |
874 | if (fdq->d_fieldmask & QC_SPC_HARD) { |
875 | q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 876 | qd->qd_qb.qb_limit = q.qu_limit; |
7e619bc3 | 877 | } |
14bf61ff JK |
878 | if (fdq->d_fieldmask & QC_SPACE) { |
879 | q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift); | |
951b4bd5 | 880 | qd->qd_qb.qb_value = q.qu_value; |
802ec9b6 | 881 | } |
7e619bc3 AD |
882 | } |
883 | ||
adfd2b5e | 884 | err = gfs2_write_disk_quota(sdp, &q, loc); |
39a72580 AD |
885 | if (!err) { |
886 | size = loc + sizeof(struct gfs2_quota); | |
887 | if (size > inode->i_size) | |
888 | i_size_write(inode, size); | |
078cd827 | 889 | inode->i_mtime = inode->i_atime = current_time(inode); |
39a72580 AD |
890 | mark_inode_dirty(inode); |
891 | set_bit(QDF_REFRESH, &qd->qd_flags); | |
7e619bc3 | 892 | } |
e285c100 | 893 | |
18ec7d5c SW |
894 | return err; |
895 | } | |
896 | ||
b3b94faa DT |
897 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
898 | { | |
481f6e7d | 899 | struct gfs2_sbd *sdp = (*qda)->qd_sbd; |
feaa7bba | 900 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 901 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
902 | unsigned int data_blocks, ind_blocks; |
903 | struct gfs2_holder *ghs, i_gh; | |
904 | unsigned int qx, x; | |
905 | struct gfs2_quota_data *qd; | |
71f890f7 | 906 | unsigned reserved; |
f42faf4f | 907 | loff_t offset; |
20b95bf2 | 908 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
909 | int error; |
910 | ||
2fba46a0 | 911 | error = gfs2_qa_get(ip); |
0a305e49 BP |
912 | if (error) |
913 | return error; | |
914 | ||
b3b94faa DT |
915 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
916 | &data_blocks, &ind_blocks); | |
917 | ||
6da2ec56 | 918 | ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
2fba46a0 BP |
919 | if (!ghs) { |
920 | error = -ENOMEM; | |
921 | goto out; | |
922 | } | |
b3b94faa DT |
923 | |
924 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
5955102c | 925 | inode_lock(&ip->i_inode); |
b3b94faa | 926 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 927 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
928 | GL_NOCACHE, &ghs[qx]); |
929 | if (error) | |
2fba46a0 | 930 | goto out_dq; |
b3b94faa DT |
931 | } |
932 | ||
933 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
934 | if (error) | |
2fba46a0 | 935 | goto out_dq; |
b3b94faa DT |
936 | |
937 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 938 | offset = qd2offset(qda[x]); |
461cb419 BP |
939 | if (gfs2_write_alloc_required(ip, offset, |
940 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
941 | nalloc++; |
942 | } | |
943 | ||
20b95bf2 AD |
944 | /* |
945 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
946 | * block to the reservation unconditionally. If the inode | |
947 | * doesn't need unstuffing, the block will be released to the | |
948 | * rgrp since it won't be allocated during the transaction | |
949 | */ | |
7e619bc3 AD |
950 | /* +3 in the end for unstuffing block, inode size update block |
951 | * and another block in case quota straddles page boundary and | |
952 | * two blocks need to be updated instead of 1 */ | |
953 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 954 | |
71f890f7 | 955 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
956 | ap.target = reserved; |
957 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
958 | if (error) |
959 | goto out_alloc; | |
b3b94faa | 960 | |
20b95bf2 | 961 | if (nalloc) |
71f890f7 | 962 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
963 | |
964 | error = gfs2_trans_begin(sdp, blocks, 0); | |
965 | if (error) | |
966 | goto out_ipres; | |
b3b94faa DT |
967 | |
968 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
969 | qd = qda[x]; |
970 | offset = qd2offset(qd); | |
ee1768e4 BP |
971 | error = gfs2_adjust_quota(sdp, offset, qd->qd_change_sync, qd, |
972 | NULL); | |
18ec7d5c | 973 | if (error) |
b3b94faa | 974 | goto out_end_trans; |
b3b94faa | 975 | |
432928c9 | 976 | do_qc(qd, -qd->qd_change_sync, QC_SYNC); |
662e3a55 | 977 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
978 | } |
979 | ||
980 | error = 0; | |
981 | ||
a91ea69f | 982 | out_end_trans: |
b3b94faa | 983 | gfs2_trans_end(sdp); |
a91ea69f | 984 | out_ipres: |
20b95bf2 | 985 | gfs2_inplace_release(ip); |
a91ea69f | 986 | out_alloc: |
b3b94faa | 987 | gfs2_glock_dq_uninit(&i_gh); |
2fba46a0 | 988 | out_dq: |
b3b94faa DT |
989 | while (qx--) |
990 | gfs2_glock_dq_uninit(&ghs[qx]); | |
5955102c | 991 | inode_unlock(&ip->i_inode); |
b3b94faa | 992 | kfree(ghs); |
c1696fb8 | 993 | gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl, |
805c0907 | 994 | GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC); |
2fba46a0 BP |
995 | out: |
996 | gfs2_qa_put(ip); | |
b3b94faa DT |
997 | return error; |
998 | } | |
999 | ||
e285c100 SW |
1000 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
1001 | { | |
1002 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1003 | struct gfs2_quota q; | |
1004 | struct gfs2_quota_lvb *qlvb; | |
1005 | loff_t pos; | |
1006 | int error; | |
1007 | ||
1008 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
1009 | pos = qd2offset(qd); | |
4306629e | 1010 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
1011 | if (error < 0) |
1012 | return error; | |
1013 | ||
4e2f8849 | 1014 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
1015 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
1016 | qlvb->__pad = 0; | |
1017 | qlvb->qb_limit = q.qu_limit; | |
1018 | qlvb->qb_warn = q.qu_warn; | |
1019 | qlvb->qb_value = q.qu_value; | |
1020 | qd->qd_qb = *qlvb; | |
1021 | ||
1022 | return 0; | |
1023 | } | |
1024 | ||
b3b94faa DT |
1025 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
1026 | struct gfs2_holder *q_gh) | |
1027 | { | |
481f6e7d | 1028 | struct gfs2_sbd *sdp = qd->qd_sbd; |
feaa7bba | 1029 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 1030 | struct gfs2_holder i_gh; |
b3b94faa DT |
1031 | int error; |
1032 | ||
481f6e7d | 1033 | gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd); |
a91ea69f | 1034 | restart: |
b3b94faa DT |
1035 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
1036 | if (error) | |
1037 | return error; | |
1038 | ||
30133177 AD |
1039 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
1040 | force_refresh = FORCE; | |
1041 | ||
4e2f8849 | 1042 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 1043 | |
e9fc2aa0 | 1044 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 1045 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
1046 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
1047 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
1048 | if (error) |
1049 | return error; | |
1050 | ||
e9fc2aa0 | 1051 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
1052 | if (error) |
1053 | goto fail; | |
1054 | ||
e285c100 SW |
1055 | error = update_qd(sdp, qd); |
1056 | if (error) | |
1e72c0f7 | 1057 | goto fail_gunlock; |
b3b94faa | 1058 | |
e285c100 | 1059 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
1060 | gfs2_glock_dq_uninit(q_gh); |
1061 | force_refresh = 0; | |
1062 | goto restart; | |
b3b94faa DT |
1063 | } |
1064 | ||
1065 | return 0; | |
1066 | ||
a91ea69f | 1067 | fail_gunlock: |
b3b94faa | 1068 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 1069 | fail: |
b3b94faa | 1070 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
1071 | return error; |
1072 | } | |
1073 | ||
7c06b5d6 | 1074 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1075 | { |
feaa7bba | 1076 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 1077 | struct gfs2_quota_data *qd; |
b58bf407 | 1078 | u32 x; |
b3b94faa DT |
1079 | int error = 0; |
1080 | ||
eef46ab7 BP |
1081 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON && |
1082 | sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) | |
b3b94faa DT |
1083 | return 0; |
1084 | ||
b54e9a0b BP |
1085 | error = gfs2_quota_hold(ip, uid, gid); |
1086 | if (error) | |
1087 | return error; | |
1088 | ||
1089 | sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num, | |
5407e242 | 1090 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
b3b94faa | 1091 | |
b54e9a0b BP |
1092 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1093 | qd = ip->i_qadata->qa_qd[x]; | |
1094 | error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]); | |
b3b94faa DT |
1095 | if (error) |
1096 | break; | |
1097 | } | |
1098 | ||
1099 | if (!error) | |
1100 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
1101 | else { | |
1102 | while (x--) | |
b54e9a0b | 1103 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
b3b94faa DT |
1104 | gfs2_quota_unhold(ip); |
1105 | } | |
1106 | ||
1107 | return error; | |
1108 | } | |
1109 | ||
2a4f6511 | 1110 | static bool need_sync(struct gfs2_quota_data *qd) |
b3b94faa | 1111 | { |
481f6e7d | 1112 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 1113 | struct gfs2_tune *gt = &sdp->sd_tune; |
cd915493 | 1114 | s64 value; |
b3b94faa | 1115 | unsigned int num, den; |
b3b94faa DT |
1116 | |
1117 | if (!qd->qd_qb.qb_limit) | |
2a4f6511 | 1118 | return false; |
b3b94faa | 1119 | |
7d80823e | 1120 | spin_lock(&qd_lock); |
b3b94faa | 1121 | value = qd->qd_change; |
7d80823e | 1122 | spin_unlock(&qd_lock); |
b3b94faa DT |
1123 | |
1124 | spin_lock(>->gt_spin); | |
1125 | num = gt->gt_quota_scale_num; | |
1126 | den = gt->gt_quota_scale_den; | |
1127 | spin_unlock(>->gt_spin); | |
1128 | ||
9f494e9b | 1129 | if (value <= 0) |
2a4f6511 | 1130 | return false; |
e9fc2aa0 SW |
1131 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
1132 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
2a4f6511 | 1133 | return false; |
b3b94faa DT |
1134 | else { |
1135 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1136 | value = div_s64(value, den); |
e9fc2aa0 | 1137 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1138 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
2a4f6511 | 1139 | return false; |
b3b94faa DT |
1140 | } |
1141 | ||
2a4f6511 | 1142 | return true; |
b3b94faa DT |
1143 | } |
1144 | ||
1145 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1146 | { | |
aabd7c72 | 1147 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1148 | struct gfs2_quota_data *qda[4]; |
1149 | unsigned int count = 0; | |
b58bf407 | 1150 | u32 x; |
aabd7c72 | 1151 | int found; |
b3b94faa DT |
1152 | |
1153 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
c9cb9e38 | 1154 | return; |
b3b94faa | 1155 | |
b54e9a0b | 1156 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
b3b94faa | 1157 | struct gfs2_quota_data *qd; |
2a4f6511 | 1158 | bool sync; |
b3b94faa | 1159 | |
b54e9a0b | 1160 | qd = ip->i_qadata->qa_qd[x]; |
b3b94faa DT |
1161 | sync = need_sync(qd); |
1162 | ||
b54e9a0b | 1163 | gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]); |
aabd7c72 SW |
1164 | if (!sync) |
1165 | continue; | |
1166 | ||
7d80823e | 1167 | spin_lock(&qd_lock); |
aabd7c72 | 1168 | found = qd_check_sync(sdp, qd, NULL); |
7d80823e | 1169 | spin_unlock(&qd_lock); |
aabd7c72 SW |
1170 | |
1171 | if (!found) | |
1172 | continue; | |
1173 | ||
1174 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1175 | if (bh_get(qd)) { | |
1176 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1177 | slot_put(qd); | |
1178 | qd_put(qd); | |
1179 | continue; | |
1180 | } | |
b3b94faa | 1181 | |
aabd7c72 | 1182 | qda[count++] = qd; |
b3b94faa DT |
1183 | } |
1184 | ||
1185 | if (count) { | |
1186 | do_sync(count, qda); | |
1187 | for (x = 0; x < count; x++) | |
1188 | qd_unlock(qda[x]); | |
1189 | } | |
1190 | ||
b3b94faa DT |
1191 | gfs2_quota_unhold(ip); |
1192 | } | |
1193 | ||
1194 | #define MAX_LINE 256 | |
1195 | ||
1196 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1197 | { | |
481f6e7d | 1198 | struct gfs2_sbd *sdp = qd->qd_sbd; |
b3b94faa | 1199 | |
eef46ab7 BP |
1200 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) |
1201 | fs_info(sdp, "quota %s for %s %u\n", | |
1202 | type, | |
1203 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", | |
1204 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1205 | |
1206 | return 0; | |
1207 | } | |
1208 | ||
25435e5e AD |
1209 | /** |
1210 | * gfs2_quota_check - check if allocating new blocks will exceed quota | |
1211 | * @ip: The inode for which this check is being performed | |
1212 | * @uid: The uid to check against | |
1213 | * @gid: The gid to check against | |
1214 | * @ap: The allocation parameters. ap->target contains the requested | |
1215 | * blocks. ap->min_target, if set, contains the minimum blks | |
1216 | * requested. | |
1217 | * | |
1218 | * Returns: 0 on success. | |
1219 | * min_req = ap->min_target ? ap->min_target : ap->target; | |
243fea4d | 1220 | * quota must allow at least min_req blks for success and |
25435e5e AD |
1221 | * ap->allowed is set to the number of blocks allowed |
1222 | * | |
1223 | * -EDQUOT otherwise, quota violation. ap->allowed is set to number | |
1224 | * of blocks available. | |
1225 | */ | |
b8fbf471 AD |
1226 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, |
1227 | struct gfs2_alloc_parms *ap) | |
b3b94faa | 1228 | { |
feaa7bba | 1229 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1230 | struct gfs2_quota_data *qd; |
25435e5e | 1231 | s64 value, warn, limit; |
b58bf407 | 1232 | u32 x; |
b3b94faa DT |
1233 | int error = 0; |
1234 | ||
25435e5e | 1235 | ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ |
b3b94faa DT |
1236 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
1237 | return 0; | |
1238 | ||
b54e9a0b BP |
1239 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1240 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1241 | |
05e0a60d EB |
1242 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1243 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1244 | continue; |
1245 | ||
25435e5e AD |
1246 | warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn); |
1247 | limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit); | |
e9fc2aa0 | 1248 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
7d80823e | 1249 | spin_lock(&qd_lock); |
25435e5e | 1250 | value += qd->qd_change; |
7d80823e | 1251 | spin_unlock(&qd_lock); |
b3b94faa | 1252 | |
25435e5e AD |
1253 | if (limit > 0 && (limit - value) < ap->allowed) |
1254 | ap->allowed = limit - value; | |
1255 | /* If we can't meet the target */ | |
1256 | if (limit && limit < (value + (s64)ap->target)) { | |
1257 | /* If no min_target specified or we don't meet | |
1258 | * min_target, return -EDQUOT */ | |
1259 | if (!ap->min_target || ap->min_target > ap->allowed) { | |
9cde2898 AD |
1260 | if (!test_and_set_bit(QDF_QMSG_QUIET, |
1261 | &qd->qd_flags)) { | |
1262 | print_message(qd, "exceeded"); | |
1263 | quota_send_warning(qd->qd_id, | |
1264 | sdp->sd_vfs->s_dev, | |
1265 | QUOTA_NL_BHARDWARN); | |
1266 | } | |
25435e5e AD |
1267 | error = -EDQUOT; |
1268 | break; | |
1269 | } | |
1270 | } else if (warn && warn < value && | |
b3b94faa | 1271 | time_after_eq(jiffies, qd->qd_last_warn + |
25435e5e AD |
1272 | gfs2_tune_get(sdp, gt_quota_warn_period) |
1273 | * HZ)) { | |
05e0a60d | 1274 | quota_send_warning(qd->qd_id, |
2ec46505 | 1275 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1276 | error = print_message(qd, "warning"); |
1277 | qd->qd_last_warn = jiffies; | |
1278 | } | |
1279 | } | |
b3b94faa DT |
1280 | return error; |
1281 | } | |
1282 | ||
cd915493 | 1283 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1284 | kuid_t uid, kgid_t gid) |
b3b94faa | 1285 | { |
b3b94faa | 1286 | struct gfs2_quota_data *qd; |
b58bf407 | 1287 | u32 x; |
b54e9a0b | 1288 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1289 | |
eef46ab7 BP |
1290 | if ((sdp->sd_args.ar_quota != GFS2_QUOTA_ON && |
1291 | sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) || | |
b54e9a0b | 1292 | gfs2_assert_warn(sdp, change)) |
b3b94faa | 1293 | return; |
383f01fb | 1294 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1295 | return; |
1296 | ||
f9615fe3 BP |
1297 | if (gfs2_assert_withdraw(sdp, ip->i_qadata && |
1298 | ip->i_qadata->qa_ref > 0)) | |
1299 | return; | |
b54e9a0b BP |
1300 | for (x = 0; x < ip->i_qadata->qa_qd_num; x++) { |
1301 | qd = ip->i_qadata->qa_qd[x]; | |
b3b94faa | 1302 | |
05e0a60d EB |
1303 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1304 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
432928c9 | 1305 | do_qc(qd, change, QC_CHANGE); |
b3b94faa DT |
1306 | } |
1307 | } | |
1308 | } | |
1309 | ||
ceed1723 | 1310 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1311 | { |
8c42d637 | 1312 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1313 | struct gfs2_quota_data **qda; |
f3b64b57 | 1314 | unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder); |
b3b94faa DT |
1315 | unsigned int num_qd; |
1316 | unsigned int x; | |
1317 | int error = 0; | |
1318 | ||
b3b94faa DT |
1319 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1320 | if (!qda) | |
1321 | return -ENOMEM; | |
1322 | ||
e46c772d SW |
1323 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1324 | sdp->sd_quota_sync_gen++; | |
1325 | ||
b3b94faa DT |
1326 | do { |
1327 | num_qd = 0; | |
1328 | ||
1329 | for (;;) { | |
1330 | error = qd_fish(sdp, qda + num_qd); | |
1331 | if (error || !qda[num_qd]) | |
1332 | break; | |
1333 | if (++num_qd == max_qd) | |
1334 | break; | |
1335 | } | |
1336 | ||
1337 | if (num_qd) { | |
1338 | if (!error) | |
1339 | error = do_sync(num_qd, qda); | |
1340 | if (!error) | |
1341 | for (x = 0; x < num_qd; x++) | |
1342 | qda[x]->qd_sync_gen = | |
1343 | sdp->sd_quota_sync_gen; | |
1344 | ||
1345 | for (x = 0; x < num_qd; x++) | |
1346 | qd_unlock(qda[x]); | |
1347 | } | |
1348 | } while (!error && num_qd == max_qd); | |
1349 | ||
e46c772d | 1350 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1351 | kfree(qda); |
1352 | ||
1353 | return error; | |
1354 | } | |
1355 | ||
ed87dabc | 1356 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1357 | { |
1358 | struct gfs2_quota_data *qd; | |
1359 | struct gfs2_holder q_gh; | |
1360 | int error; | |
1361 | ||
05e0a60d | 1362 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1363 | if (error) |
1364 | return error; | |
1365 | ||
1366 | error = do_glock(qd, FORCE, &q_gh); | |
1367 | if (!error) | |
1368 | gfs2_glock_dq_uninit(&q_gh); | |
1369 | ||
1370 | qd_put(qd); | |
b3b94faa DT |
1371 | return error; |
1372 | } | |
1373 | ||
b3b94faa DT |
1374 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1375 | { | |
feaa7bba | 1376 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1377 | u64 size = i_size_read(sdp->sd_qc_inode); |
1378 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1379 | unsigned int x, slot = 0; |
1380 | unsigned int found = 0; | |
c754fbbb | 1381 | unsigned int hash; |
ee2411a8 | 1382 | unsigned int bm_size; |
cd915493 SW |
1383 | u64 dblock; |
1384 | u32 extlen = 0; | |
b3b94faa DT |
1385 | int error; |
1386 | ||
a2e0f799 | 1387 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1388 | return -EIO; |
a2e0f799 | 1389 | |
b3b94faa | 1390 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
ee2411a8 SW |
1391 | bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long)); |
1392 | bm_size *= sizeof(unsigned long); | |
b3b94faa | 1393 | error = -ENOMEM; |
fcf10d38 | 1394 | sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN); |
ee2411a8 | 1395 | if (sdp->sd_quota_bitmap == NULL) |
fcf10d38 | 1396 | sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS | |
88dca4ca | 1397 | __GFP_ZERO); |
b3b94faa DT |
1398 | if (!sdp->sd_quota_bitmap) |
1399 | return error; | |
1400 | ||
b3b94faa DT |
1401 | for (x = 0; x < blocks; x++) { |
1402 | struct buffer_head *bh; | |
7aed98fb | 1403 | const struct gfs2_quota_change *qc; |
b3b94faa DT |
1404 | unsigned int y; |
1405 | ||
1406 | if (!extlen) { | |
9153dac1 AG |
1407 | extlen = 32; |
1408 | error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen); | |
b3b94faa DT |
1409 | if (error) |
1410 | goto fail; | |
1411 | } | |
b3b94faa | 1412 | error = -EIO; |
7276b3b0 SW |
1413 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1414 | if (!bh) | |
1415 | goto fail; | |
b3b94faa DT |
1416 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1417 | brelse(bh); | |
1418 | goto fail; | |
1419 | } | |
1420 | ||
7aed98fb | 1421 | qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
7276b3b0 | 1422 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1423 | y++, slot++) { |
b3b94faa | 1424 | struct gfs2_quota_data *qd; |
7aed98fb SW |
1425 | s64 qc_change = be64_to_cpu(qc->qc_change); |
1426 | u32 qc_flags = be32_to_cpu(qc->qc_flags); | |
1427 | enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ? | |
1428 | USRQUOTA : GRPQUOTA; | |
1429 | struct kqid qc_id = make_kqid(&init_user_ns, qtype, | |
1430 | be32_to_cpu(qc->qc_id)); | |
1431 | qc++; | |
1432 | if (!qc_change) | |
b3b94faa DT |
1433 | continue; |
1434 | ||
c754fbbb SW |
1435 | hash = gfs2_qd_hash(sdp, qc_id); |
1436 | qd = qd_alloc(hash, sdp, qc_id); | |
1437 | if (qd == NULL) { | |
b3b94faa DT |
1438 | brelse(bh); |
1439 | goto fail; | |
1440 | } | |
1441 | ||
1442 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
7aed98fb | 1443 | qd->qd_change = qc_change; |
b3b94faa DT |
1444 | qd->qd_slot = slot; |
1445 | qd->qd_slot_count = 1; | |
b3b94faa | 1446 | |
7d80823e | 1447 | spin_lock(&qd_lock); |
ee2411a8 | 1448 | BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap)); |
b3b94faa DT |
1449 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
1450 | atomic_inc(&sdp->sd_quota_count); | |
7d80823e | 1451 | spin_unlock(&qd_lock); |
b3b94faa | 1452 | |
c754fbbb SW |
1453 | spin_lock_bucket(hash); |
1454 | hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]); | |
1455 | spin_unlock_bucket(hash); | |
1456 | ||
b3b94faa DT |
1457 | found++; |
1458 | } | |
1459 | ||
1460 | brelse(bh); | |
1461 | dblock++; | |
1462 | extlen--; | |
1463 | } | |
1464 | ||
1465 | if (found) | |
1466 | fs_info(sdp, "found %u quota changes\n", found); | |
1467 | ||
1468 | return 0; | |
1469 | ||
a91ea69f | 1470 | fail: |
b3b94faa DT |
1471 | gfs2_quota_cleanup(sdp); |
1472 | return error; | |
1473 | } | |
1474 | ||
b3b94faa DT |
1475 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1476 | { | |
b3b94faa | 1477 | struct gfs2_quota_data *qd; |
961fe342 | 1478 | LIST_HEAD(dispose); |
a475c5dd AG |
1479 | int count; |
1480 | ||
1481 | BUG_ON(test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)); | |
b3b94faa | 1482 | |
7d80823e | 1483 | spin_lock(&qd_lock); |
961fe342 | 1484 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
a475c5dd AG |
1485 | spin_lock(&qd->qd_lockref.lock); |
1486 | if (qd->qd_lockref.count != 0) { | |
1487 | spin_unlock(&qd->qd_lockref.lock); | |
1488 | continue; | |
1489 | } | |
1490 | lockref_mark_dead(&qd->qd_lockref); | |
1491 | spin_unlock(&qd->qd_lockref.lock); | |
1492 | ||
2147dbfd | 1493 | list_lru_del(&gfs2_qd_lru, &qd->qd_lru); |
961fe342 | 1494 | list_add(&qd->qd_lru, &dispose); |
b3b94faa | 1495 | } |
7d80823e | 1496 | spin_unlock(&qd_lock); |
b3b94faa | 1497 | |
faada74a | 1498 | gfs2_qd_list_dispose(&dispose); |
a475c5dd AG |
1499 | |
1500 | wait_event_timeout(sdp->sd_kill_wait, | |
1501 | (count = atomic_read(&sdp->sd_quota_count)) == 0, | |
1502 | HZ * 60); | |
1503 | ||
1504 | if (count != 0) | |
1505 | fs_err(sdp, "%d left-over quota data objects\n", count); | |
b3b94faa | 1506 | |
3cdcf63e AV |
1507 | kvfree(sdp->sd_quota_bitmap); |
1508 | sdp->sd_quota_bitmap = NULL; | |
b3b94faa DT |
1509 | } |
1510 | ||
37b2c837 SW |
1511 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1512 | { | |
1513 | if (error == 0 || error == -EROFS) | |
1514 | return; | |
eb43e660 | 1515 | if (!gfs2_withdrawn(sdp)) { |
f34a6135 BP |
1516 | if (!cmpxchg(&sdp->sd_log_error, 0, error)) |
1517 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
942b0cdd BP |
1518 | wake_up(&sdp->sd_logd_waitq); |
1519 | } | |
37b2c837 SW |
1520 | } |
1521 | ||
1522 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1523 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1524 | unsigned long t, unsigned long *timeo, |
1525 | unsigned int *new_timeo) | |
1526 | { | |
1527 | if (t >= *timeo) { | |
8c42d637 | 1528 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1529 | quotad_error(sdp, msg, error); |
1530 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1531 | } else { | |
1532 | *timeo -= t; | |
1533 | } | |
1534 | } | |
1535 | ||
3d3c10f2 BM |
1536 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1537 | if (!sdp->sd_statfs_force_sync) { | |
1538 | sdp->sd_statfs_force_sync = 1; | |
1539 | wake_up(&sdp->sd_quota_wait); | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | ||
37b2c837 SW |
1544 | /** |
1545 | * gfs2_quotad - Write cached quota changes into the quota file | |
c551f66c | 1546 | * @data: Pointer to GFS2 superblock |
37b2c837 SW |
1547 | * |
1548 | */ | |
1549 | ||
1550 | int gfs2_quotad(void *data) | |
1551 | { | |
1552 | struct gfs2_sbd *sdp = data; | |
1553 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1554 | unsigned long statfs_timeo = 0; | |
1555 | unsigned long quotad_timeo = 0; | |
1556 | unsigned long t = 0; | |
37b2c837 SW |
1557 | |
1558 | while (!kthread_should_stop()) { | |
601ef0d5 | 1559 | if (gfs2_withdrawn(sdp)) |
fe0690f0 AG |
1560 | break; |
1561 | ||
37b2c837 | 1562 | /* Update the master statfs file */ |
3d3c10f2 BM |
1563 | if (sdp->sd_statfs_force_sync) { |
1564 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1565 | quotad_error(sdp, "statfs", error); | |
1566 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1567 | } | |
1568 | else | |
1569 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1570 | &statfs_timeo, | |
1571 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1572 | |
1573 | /* Update quota file */ | |
edd2e9ac | 1574 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1575 | "ad_timeo, &tune->gt_quota_quantum); |
1576 | ||
a0acae0e TH |
1577 | try_to_freeze(); |
1578 | ||
37b2c837 SW |
1579 | t = min(quotad_timeo, statfs_timeo); |
1580 | ||
e4a8b548 | 1581 | t = wait_event_interruptible_timeout(sdp->sd_quota_wait, |
fe0690f0 AG |
1582 | sdp->sd_statfs_force_sync || |
1583 | gfs2_withdrawn(sdp) || | |
1584 | kthread_should_stop(), | |
e4a8b548 AG |
1585 | t); |
1586 | ||
1587 | if (sdp->sd_statfs_force_sync) | |
813e0c46 | 1588 | t = 0; |
37b2c837 SW |
1589 | } |
1590 | ||
1591 | return 0; | |
1592 | } | |
1593 | ||
e54b2e2d | 1594 | static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state) |
1d371b5e SW |
1595 | { |
1596 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1597 | ||
e54b2e2d | 1598 | memset(state, 0, sizeof(*state)); |
ad6bb90f CH |
1599 | |
1600 | switch (sdp->sd_args.ar_quota) { | |
eef46ab7 BP |
1601 | case GFS2_QUOTA_QUIET: |
1602 | fallthrough; | |
ad6bb90f | 1603 | case GFS2_QUOTA_ON: |
e54b2e2d JK |
1604 | state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED; |
1605 | state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED; | |
df561f66 | 1606 | fallthrough; |
ad6bb90f | 1607 | case GFS2_QUOTA_ACCOUNT: |
e54b2e2d JK |
1608 | state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED | |
1609 | QCI_SYSFILE; | |
1610 | state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED | | |
1611 | QCI_SYSFILE; | |
ad6bb90f CH |
1612 | break; |
1613 | case GFS2_QUOTA_OFF: | |
1614 | break; | |
1615 | } | |
1d371b5e | 1616 | if (sdp->sd_quota_inode) { |
e54b2e2d JK |
1617 | state->s_state[USRQUOTA].ino = |
1618 | GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1619 | state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks; | |
1d371b5e | 1620 | } |
e54b2e2d JK |
1621 | state->s_state[USRQUOTA].nextents = 1; /* unsupported */ |
1622 | state->s_state[GRPQUOTA] = state->s_state[USRQUOTA]; | |
1623 | state->s_incoredqs = list_lru_count(&gfs2_qd_lru); | |
1d371b5e SW |
1624 | return 0; |
1625 | } | |
1626 | ||
74a8a103 | 1627 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1628 | struct qc_dqblk *fdq) |
113d6b3c SW |
1629 | { |
1630 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1631 | struct gfs2_quota_lvb *qlvb; | |
1632 | struct gfs2_quota_data *qd; | |
1633 | struct gfs2_holder q_gh; | |
1634 | int error; | |
1635 | ||
14bf61ff | 1636 | memset(fdq, 0, sizeof(*fdq)); |
113d6b3c SW |
1637 | |
1638 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1639 | return -ESRCH; /* Crazy XFS error code */ | |
1640 | ||
236c64e4 EB |
1641 | if ((qid.type != USRQUOTA) && |
1642 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1643 | return -EINVAL; |
1644 | ||
05e0a60d | 1645 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1646 | if (error) |
1647 | return error; | |
1648 | error = do_glock(qd, FORCE, &q_gh); | |
1649 | if (error) | |
1650 | goto out; | |
1651 | ||
4e2f8849 | 1652 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
14bf61ff JK |
1653 | fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift; |
1654 | fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift; | |
1655 | fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift; | |
113d6b3c SW |
1656 | |
1657 | gfs2_glock_dq_uninit(&q_gh); | |
1658 | out: | |
1659 | qd_put(qd); | |
1660 | return error; | |
1661 | } | |
1662 | ||
e285c100 | 1663 | /* GFS2 only supports a subset of the XFS fields */ |
14bf61ff | 1664 | #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE) |
e285c100 | 1665 | |
74a8a103 | 1666 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
14bf61ff | 1667 | struct qc_dqblk *fdq) |
e285c100 SW |
1668 | { |
1669 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1670 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1671 | struct gfs2_quota_data *qd; | |
1672 | struct gfs2_holder q_gh, i_gh; | |
1673 | unsigned int data_blocks, ind_blocks; | |
1674 | unsigned int blocks = 0; | |
1675 | int alloc_required; | |
e285c100 SW |
1676 | loff_t offset; |
1677 | int error; | |
1678 | ||
1679 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1680 | return -ESRCH; /* Crazy XFS error code */ | |
1681 | ||
236c64e4 EB |
1682 | if ((qid.type != USRQUOTA) && |
1683 | (qid.type != GRPQUOTA)) | |
e285c100 | 1684 | return -EINVAL; |
e285c100 SW |
1685 | |
1686 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1687 | return -EINVAL; | |
e285c100 | 1688 | |
05e0a60d | 1689 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1690 | if (error) |
1691 | return error; | |
1692 | ||
2fba46a0 | 1693 | error = gfs2_qa_get(ip); |
0a305e49 BP |
1694 | if (error) |
1695 | goto out_put; | |
1696 | ||
5955102c | 1697 | inode_lock(&ip->i_inode); |
e285c100 SW |
1698 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); |
1699 | if (error) | |
0a305e49 | 1700 | goto out_unlockput; |
e285c100 SW |
1701 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1702 | if (error) | |
1703 | goto out_q; | |
1704 | ||
1705 | /* Check for existing entry, if none then alloc new blocks */ | |
1706 | error = update_qd(sdp, qd); | |
1707 | if (error) | |
1708 | goto out_i; | |
1709 | ||
1710 | /* If nothing has changed, this is a no-op */ | |
14bf61ff JK |
1711 | if ((fdq->d_fieldmask & QC_SPC_SOFT) && |
1712 | ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) | |
1713 | fdq->d_fieldmask ^= QC_SPC_SOFT; | |
802ec9b6 | 1714 | |
14bf61ff JK |
1715 | if ((fdq->d_fieldmask & QC_SPC_HARD) && |
1716 | ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) | |
1717 | fdq->d_fieldmask ^= QC_SPC_HARD; | |
802ec9b6 | 1718 | |
14bf61ff JK |
1719 | if ((fdq->d_fieldmask & QC_SPACE) && |
1720 | ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1721 | fdq->d_fieldmask ^= QC_SPACE; | |
802ec9b6 | 1722 | |
e285c100 SW |
1723 | if (fdq->d_fieldmask == 0) |
1724 | goto out_i; | |
1725 | ||
1726 | offset = qd2offset(qd); | |
461cb419 | 1727 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1728 | if (gfs2_is_stuffed(ip)) |
1729 | alloc_required = 1; | |
e285c100 | 1730 | if (alloc_required) { |
7b9cff46 | 1731 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1732 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1733 | &data_blocks, &ind_blocks); | |
564e12b1 | 1734 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1735 | ap.target = blocks; |
1736 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1737 | if (error) |
564e12b1 | 1738 | goto out_i; |
71f890f7 | 1739 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1740 | } |
1741 | ||
e79a46a0 AD |
1742 | /* Some quotas span block boundaries and can update two blocks, |
1743 | adding an extra block to the transaction to handle such quotas */ | |
1744 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1745 | if (error) |
1746 | goto out_release; | |
1747 | ||
1748 | /* Apply changes */ | |
ee1768e4 | 1749 | error = gfs2_adjust_quota(sdp, offset, 0, qd, fdq); |
9cde2898 AD |
1750 | if (!error) |
1751 | clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); | |
e285c100 SW |
1752 | |
1753 | gfs2_trans_end(sdp); | |
1754 | out_release: | |
564e12b1 | 1755 | if (alloc_required) |
e285c100 | 1756 | gfs2_inplace_release(ip); |
e285c100 SW |
1757 | out_i: |
1758 | gfs2_glock_dq_uninit(&i_gh); | |
1759 | out_q: | |
1760 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1761 | out_unlockput: |
2fba46a0 | 1762 | gfs2_qa_put(ip); |
5955102c | 1763 | inode_unlock(&ip->i_inode); |
0a305e49 | 1764 | out_put: |
e285c100 SW |
1765 | qd_put(qd); |
1766 | return error; | |
1767 | } | |
1768 | ||
cc632e7f SW |
1769 | const struct quotactl_ops gfs2_quotactl_ops = { |
1770 | .quota_sync = gfs2_quota_sync, | |
e54b2e2d | 1771 | .get_state = gfs2_quota_get_state, |
b9b2dd36 | 1772 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1773 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1774 | }; |
c754fbbb SW |
1775 | |
1776 | void __init gfs2_quota_hash_init(void) | |
1777 | { | |
1778 | unsigned i; | |
1779 | ||
1780 | for(i = 0; i < GFS2_QD_HASH_SIZE; i++) | |
1781 | INIT_HLIST_BL_HEAD(&qd_hash_table[i]); | |
1782 | } |