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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | /* | |
11 | * Quota change tags are associated with each transaction that allocates or | |
12 | * deallocates space. Those changes are accumulated locally to each node (in a | |
13 | * per-node file) and then are periodically synced to the quota file. This | |
14 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
15 | * fuzziness in the current usage value of IDs that are being used on different | |
16 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
17 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 18 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
19 | * program to be run on node crashes or anything like that. |
20 | * | |
21 | * There are couple of knobs that let the administrator manage the quota | |
22 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
23 | * sitting on one node before being synced to the quota file. (The default is | |
24 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
25 | * of quota file syncs increases as the user moves closer to their limit. The | |
26 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
27 | * means that there is more contention between the nodes for the quota file. | |
28 | * The default value is one. This sets the maximum theoretical quota overrun | |
29 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
30 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
31 | * number greater than one makes quota syncs more frequent and reduces the | |
32 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
33 | * syncs less frequent. | |
34 | * | |
35 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
36 | * the quota file, so it is not being constantly read. | |
37 | */ | |
38 | ||
39 | #include <linux/sched.h> | |
40 | #include <linux/slab.h> | |
1495f230 | 41 | #include <linux/mm.h> |
b3b94faa DT |
42 | #include <linux/spinlock.h> |
43 | #include <linux/completion.h> | |
44 | #include <linux/buffer_head.h> | |
b3b94faa | 45 | #include <linux/sort.h> |
18ec7d5c | 46 | #include <linux/fs.h> |
2e565bb6 | 47 | #include <linux/bio.h> |
5c676f6d | 48 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
49 | #include <linux/kthread.h> |
50 | #include <linux/freezer.h> | |
2ec46505 | 51 | #include <linux/quota.h> |
1d371b5e | 52 | #include <linux/dqblk_xfs.h> |
9b9f039d | 53 | #include <linux/lockref.h> |
b3b94faa DT |
54 | |
55 | #include "gfs2.h" | |
5c676f6d | 56 | #include "incore.h" |
b3b94faa DT |
57 | #include "bmap.h" |
58 | #include "glock.h" | |
59 | #include "glops.h" | |
b3b94faa DT |
60 | #include "log.h" |
61 | #include "meta_io.h" | |
62 | #include "quota.h" | |
63 | #include "rgrp.h" | |
64 | #include "super.h" | |
65 | #include "trans.h" | |
18ec7d5c | 66 | #include "inode.h" |
5c676f6d | 67 | #include "util.h" |
b3b94faa | 68 | |
bb8d8a6f SW |
69 | struct gfs2_quota_change_host { |
70 | u64 qc_change; | |
71 | u32 qc_flags; /* GFS2_QCF_... */ | |
e08d8d7f | 72 | struct kqid qc_id; |
bb8d8a6f SW |
73 | }; |
74 | ||
0a7ab79c AD |
75 | static LIST_HEAD(qd_lru_list); |
76 | static atomic_t qd_lru_count = ATOMIC_INIT(0); | |
1328df72 | 77 | static DEFINE_SPINLOCK(qd_lru_lock); |
0a7ab79c | 78 | |
1ab6c499 DC |
79 | unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, |
80 | struct shrink_control *sc) | |
0a7ab79c AD |
81 | { |
82 | struct gfs2_quota_data *qd; | |
83 | struct gfs2_sbd *sdp; | |
1495f230 | 84 | int nr_to_scan = sc->nr_to_scan; |
1ab6c499 | 85 | long freed = 0; |
0a7ab79c | 86 | |
1495f230 | 87 | if (!(sc->gfp_mask & __GFP_FS)) |
1ab6c499 | 88 | return SHRINK_STOP; |
0a7ab79c AD |
89 | |
90 | spin_lock(&qd_lru_lock); | |
1495f230 | 91 | while (nr_to_scan && !list_empty(&qd_lru_list)) { |
0a7ab79c AD |
92 | qd = list_entry(qd_lru_list.next, |
93 | struct gfs2_quota_data, qd_reclaim); | |
94 | sdp = qd->qd_gl->gl_sbd; | |
95 | ||
96 | /* Free from the filesystem-specific list */ | |
97 | list_del(&qd->qd_list); | |
98 | ||
0a7ab79c AD |
99 | gfs2_assert_warn(sdp, !qd->qd_change); |
100 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
101 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
102 | ||
f057f6cd | 103 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
104 | atomic_dec(&sdp->sd_quota_count); |
105 | ||
106 | /* Delete it from the common reclaim list */ | |
107 | list_del_init(&qd->qd_reclaim); | |
108 | atomic_dec(&qd_lru_count); | |
109 | spin_unlock(&qd_lru_lock); | |
110 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
111 | spin_lock(&qd_lru_lock); | |
1495f230 | 112 | nr_to_scan--; |
1ab6c499 | 113 | freed++; |
0a7ab79c AD |
114 | } |
115 | spin_unlock(&qd_lru_lock); | |
1ab6c499 DC |
116 | return freed; |
117 | } | |
0a7ab79c | 118 | |
1ab6c499 DC |
119 | unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
120 | struct shrink_control *sc) | |
121 | { | |
55f841ce | 122 | return vfs_pressure_ratio(atomic_read(&qd_lru_count)); |
0a7ab79c AD |
123 | } |
124 | ||
2f6c9896 EB |
125 | static u64 qd2index(struct gfs2_quota_data *qd) |
126 | { | |
05e0a60d EB |
127 | struct kqid qid = qd->qd_id; |
128 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 129 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
130 | } |
131 | ||
cd915493 | 132 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 133 | { |
cd915493 | 134 | u64 offset; |
b3b94faa | 135 | |
2f6c9896 | 136 | offset = qd2index(qd); |
b3b94faa DT |
137 | offset *= sizeof(struct gfs2_quota); |
138 | ||
139 | return offset; | |
140 | } | |
141 | ||
05e0a60d | 142 | static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
143 | struct gfs2_quota_data **qdp) |
144 | { | |
145 | struct gfs2_quota_data *qd; | |
146 | int error; | |
147 | ||
37b2c837 | 148 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
149 | if (!qd) |
150 | return -ENOMEM; | |
151 | ||
9b9f039d SW |
152 | qd->qd_lockref.count = 1; |
153 | spin_lock_init(&qd->qd_lockref.lock); | |
05e0a60d | 154 | qd->qd_id = qid; |
b3b94faa | 155 | qd->qd_slot = -1; |
0a7ab79c | 156 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 157 | |
2f6c9896 | 158 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
159 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
160 | if (error) | |
161 | goto fail; | |
162 | ||
b3b94faa DT |
163 | *qdp = qd; |
164 | ||
165 | return 0; | |
166 | ||
a91ea69f | 167 | fail: |
37b2c837 | 168 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
169 | return error; |
170 | } | |
171 | ||
05e0a60d | 172 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
173 | struct gfs2_quota_data **qdp) |
174 | { | |
175 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
176 | int error, found; | |
177 | ||
178 | *qdp = NULL; | |
179 | ||
180 | for (;;) { | |
181 | found = 0; | |
0a7ab79c | 182 | spin_lock(&qd_lru_lock); |
b3b94faa | 183 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
05e0a60d | 184 | if (qid_eq(qd->qd_id, qid)) { |
9b9f039d SW |
185 | lockref_get(&qd->qd_lockref); |
186 | if (!list_empty(&qd->qd_reclaim)) { | |
0a7ab79c AD |
187 | /* Remove it from reclaim list */ |
188 | list_del_init(&qd->qd_reclaim); | |
189 | atomic_dec(&qd_lru_count); | |
190 | } | |
b3b94faa DT |
191 | found = 1; |
192 | break; | |
193 | } | |
194 | } | |
195 | ||
196 | if (!found) | |
197 | qd = NULL; | |
198 | ||
199 | if (!qd && new_qd) { | |
200 | qd = new_qd; | |
201 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
202 | atomic_inc(&sdp->sd_quota_count); | |
203 | new_qd = NULL; | |
204 | } | |
205 | ||
0a7ab79c | 206 | spin_unlock(&qd_lru_lock); |
b3b94faa | 207 | |
6a6ada81 | 208 | if (qd) { |
b3b94faa | 209 | if (new_qd) { |
f057f6cd | 210 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 211 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
212 | } |
213 | *qdp = qd; | |
214 | return 0; | |
215 | } | |
216 | ||
05e0a60d | 217 | error = qd_alloc(sdp, qid, &new_qd); |
b3b94faa DT |
218 | if (error) |
219 | return error; | |
220 | } | |
221 | } | |
222 | ||
223 | static void qd_hold(struct gfs2_quota_data *qd) | |
224 | { | |
225 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
9b9f039d SW |
226 | gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
227 | lockref_get(&qd->qd_lockref); | |
b3b94faa DT |
228 | } |
229 | ||
230 | static void qd_put(struct gfs2_quota_data *qd) | |
231 | { | |
9b9f039d SW |
232 | spin_lock(&qd_lru_lock); |
233 | ||
234 | if (!lockref_put_or_lock(&qd->qd_lockref)) { | |
235 | ||
0a7ab79c AD |
236 | /* Add to the reclaim list */ |
237 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
238 | atomic_inc(&qd_lru_count); | |
9b9f039d SW |
239 | |
240 | spin_unlock(&qd->qd_lockref.lock); | |
0a7ab79c | 241 | } |
9b9f039d SW |
242 | |
243 | spin_unlock(&qd_lru_lock); | |
b3b94faa DT |
244 | } |
245 | ||
246 | static int slot_get(struct gfs2_quota_data *qd) | |
247 | { | |
248 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
249 | unsigned int c, o = 0, b; | |
250 | unsigned char byte = 0; | |
251 | ||
22077f57 | 252 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
253 | |
254 | if (qd->qd_slot_count++) { | |
22077f57 | 255 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
256 | return 0; |
257 | } | |
258 | ||
259 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
260 | for (o = 0; o < PAGE_SIZE; o++) { | |
261 | byte = sdp->sd_quota_bitmap[c][o]; | |
262 | if (byte != 0xFF) | |
263 | goto found; | |
264 | } | |
265 | ||
266 | goto fail; | |
267 | ||
a91ea69f | 268 | found: |
b3b94faa DT |
269 | for (b = 0; b < 8; b++) |
270 | if (!(byte & (1 << b))) | |
271 | break; | |
272 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
273 | ||
274 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
275 | goto fail; | |
276 | ||
277 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
278 | ||
22077f57 | 279 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
280 | |
281 | return 0; | |
282 | ||
a91ea69f | 283 | fail: |
b3b94faa | 284 | qd->qd_slot_count--; |
22077f57 | 285 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
286 | return -ENOSPC; |
287 | } | |
288 | ||
289 | static void slot_hold(struct gfs2_quota_data *qd) | |
290 | { | |
291 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
292 | ||
22077f57 | 293 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
294 | gfs2_assert(sdp, qd->qd_slot_count); |
295 | qd->qd_slot_count++; | |
22077f57 | 296 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
297 | } |
298 | ||
26e43a15 SW |
299 | static void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap, |
300 | unsigned int bit, int new_value) | |
301 | { | |
302 | unsigned int c, o, b = bit; | |
303 | int old_value; | |
304 | ||
305 | c = b / (8 * PAGE_SIZE); | |
306 | b %= 8 * PAGE_SIZE; | |
307 | o = b / 8; | |
308 | b %= 8; | |
309 | ||
310 | old_value = (bitmap[c][o] & (1 << b)); | |
311 | gfs2_assert_withdraw(sdp, !old_value != !new_value); | |
312 | ||
313 | if (new_value) | |
314 | bitmap[c][o] |= 1 << b; | |
315 | else | |
316 | bitmap[c][o] &= ~(1 << b); | |
317 | } | |
318 | ||
b3b94faa DT |
319 | static void slot_put(struct gfs2_quota_data *qd) |
320 | { | |
321 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
322 | ||
22077f57 | 323 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
324 | gfs2_assert(sdp, qd->qd_slot_count); |
325 | if (!--qd->qd_slot_count) { | |
326 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
327 | qd->qd_slot = -1; | |
328 | } | |
22077f57 | 329 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
330 | } |
331 | ||
332 | static int bh_get(struct gfs2_quota_data *qd) | |
333 | { | |
334 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 335 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 336 | unsigned int block, offset; |
b3b94faa DT |
337 | struct buffer_head *bh; |
338 | int error; | |
23591256 | 339 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 340 | |
f55ab26a | 341 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
342 | |
343 | if (qd->qd_bh_count++) { | |
f55ab26a | 344 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
345 | return 0; |
346 | } | |
347 | ||
348 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 349 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 350 | |
23591256 | 351 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 352 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
353 | if (error) |
354 | goto fail; | |
7276b3b0 | 355 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
356 | if (error) |
357 | goto fail; | |
358 | error = -EIO; | |
359 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
360 | goto fail_brelse; | |
361 | ||
362 | qd->qd_bh = bh; | |
363 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
364 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
365 | offset * sizeof(struct gfs2_quota_change)); | |
366 | ||
2e95b665 | 367 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
368 | |
369 | return 0; | |
370 | ||
a91ea69f | 371 | fail_brelse: |
b3b94faa | 372 | brelse(bh); |
a91ea69f | 373 | fail: |
b3b94faa | 374 | qd->qd_bh_count--; |
f55ab26a | 375 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
376 | return error; |
377 | } | |
378 | ||
379 | static void bh_put(struct gfs2_quota_data *qd) | |
380 | { | |
381 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
382 | ||
f55ab26a | 383 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
384 | gfs2_assert(sdp, qd->qd_bh_count); |
385 | if (!--qd->qd_bh_count) { | |
386 | brelse(qd->qd_bh); | |
387 | qd->qd_bh = NULL; | |
388 | qd->qd_bh_qc = NULL; | |
389 | } | |
f55ab26a | 390 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
391 | } |
392 | ||
1bf59bf6 SW |
393 | static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd, |
394 | u64 *sync_gen) | |
395 | { | |
396 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
397 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
398 | (sync_gen && (qd->qd_sync_gen >= *sync_gen))) | |
399 | return 0; | |
400 | ||
401 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
402 | ||
403 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
9b9f039d SW |
404 | gfs2_assert_warn(sdp, !__lockref_is_dead(&qd->qd_lockref)); |
405 | lockref_get(&qd->qd_lockref); | |
1bf59bf6 SW |
406 | qd->qd_change_sync = qd->qd_change; |
407 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
408 | qd->qd_slot_count++; | |
409 | return 1; | |
410 | } | |
411 | ||
b3b94faa DT |
412 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
413 | { | |
414 | struct gfs2_quota_data *qd = NULL; | |
415 | int error; | |
416 | int found = 0; | |
417 | ||
418 | *qdp = NULL; | |
419 | ||
420 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
421 | return 0; | |
422 | ||
0a7ab79c | 423 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
424 | |
425 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
1bf59bf6 SW |
426 | found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen); |
427 | if (found) | |
428 | break; | |
b3b94faa DT |
429 | } |
430 | ||
431 | if (!found) | |
432 | qd = NULL; | |
433 | ||
0a7ab79c | 434 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
435 | |
436 | if (qd) { | |
437 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
438 | error = bh_get(qd); | |
439 | if (error) { | |
440 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
441 | slot_put(qd); | |
442 | qd_put(qd); | |
443 | return error; | |
444 | } | |
445 | } | |
446 | ||
447 | *qdp = qd; | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
b3b94faa DT |
452 | static void qd_unlock(struct gfs2_quota_data *qd) |
453 | { | |
568f4c96 SW |
454 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
455 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
456 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
457 | bh_put(qd); | |
458 | slot_put(qd); | |
459 | qd_put(qd); | |
460 | } | |
461 | ||
b59c8b6f | 462 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
463 | struct gfs2_quota_data **qdp) |
464 | { | |
465 | int error; | |
466 | ||
05e0a60d | 467 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
468 | if (error) |
469 | return error; | |
470 | ||
471 | error = slot_get(*qdp); | |
472 | if (error) | |
473 | goto fail; | |
474 | ||
475 | error = bh_get(*qdp); | |
476 | if (error) | |
477 | goto fail_slot; | |
478 | ||
479 | return 0; | |
480 | ||
a91ea69f | 481 | fail_slot: |
b3b94faa | 482 | slot_put(*qdp); |
a91ea69f | 483 | fail: |
b3b94faa DT |
484 | qd_put(*qdp); |
485 | return error; | |
486 | } | |
487 | ||
488 | static void qdsb_put(struct gfs2_quota_data *qd) | |
489 | { | |
490 | bh_put(qd); | |
491 | slot_put(qd); | |
492 | qd_put(qd); | |
493 | } | |
494 | ||
7c06b5d6 | 495 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 496 | { |
feaa7bba | 497 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 498 | struct gfs2_quota_data **qd; |
b3b94faa DT |
499 | int error; |
500 | ||
aaaf68c5 AP |
501 | if (ip->i_res == NULL) { |
502 | error = gfs2_rs_alloc(ip); | |
503 | if (error) | |
504 | return error; | |
505 | } | |
5407e242 BP |
506 | |
507 | qd = ip->i_res->rs_qa_qd; | |
508 | ||
509 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
510 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
511 | return -EIO; | |
512 | ||
513 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
514 | return 0; | |
515 | ||
b59c8b6f | 516 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
517 | if (error) |
518 | goto out; | |
5407e242 | 519 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
520 | qd++; |
521 | ||
b59c8b6f | 522 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
523 | if (error) |
524 | goto out; | |
5407e242 | 525 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
526 | qd++; |
527 | ||
6b24c0d2 EB |
528 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
529 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 530 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
531 | if (error) |
532 | goto out; | |
5407e242 | 533 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
534 | qd++; |
535 | } | |
536 | ||
6b24c0d2 EB |
537 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
538 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 539 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
540 | if (error) |
541 | goto out; | |
5407e242 | 542 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
543 | qd++; |
544 | } | |
545 | ||
a91ea69f | 546 | out: |
b3b94faa DT |
547 | if (error) |
548 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
549 | return error; |
550 | } | |
551 | ||
552 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
553 | { | |
feaa7bba | 554 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
555 | unsigned int x; |
556 | ||
5407e242 BP |
557 | if (ip->i_res == NULL) |
558 | return; | |
b3b94faa DT |
559 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
560 | ||
5407e242 BP |
561 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
562 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
563 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 564 | } |
5407e242 | 565 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
566 | } |
567 | ||
568 | static int sort_qd(const void *a, const void *b) | |
569 | { | |
48fac179 SW |
570 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
571 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 572 | |
05e0a60d | 573 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 574 | return -1; |
05e0a60d | 575 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 576 | return 1; |
48fac179 | 577 | return 0; |
b3b94faa DT |
578 | } |
579 | ||
cd915493 | 580 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
581 | { |
582 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 583 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 584 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 585 | s64 x; |
b3b94faa | 586 | |
f55ab26a | 587 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 588 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
589 | |
590 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
591 | qc->qc_change = 0; | |
592 | qc->qc_flags = 0; | |
05e0a60d | 593 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 594 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 595 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
596 | } |
597 | ||
b44b84d7 | 598 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
599 | qc->qc_change = cpu_to_be64(x); |
600 | ||
22077f57 | 601 | spin_lock(&qd_lru_lock); |
b3b94faa | 602 | qd->qd_change = x; |
22077f57 | 603 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
604 | |
605 | if (!x) { | |
606 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
607 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
608 | qc->qc_flags = 0; | |
609 | qc->qc_id = 0; | |
610 | slot_put(qd); | |
611 | qd_put(qd); | |
612 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
613 | qd_hold(qd); | |
614 | slot_hold(qd); | |
615 | } | |
907b9bce | 616 | |
f55ab26a | 617 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
618 | } |
619 | ||
18ec7d5c | 620 | /** |
1e72c0f7 SW |
621 | * gfs2_adjust_quota - adjust record of current block usage |
622 | * @ip: The quota inode | |
623 | * @loc: Offset of the entry in the quota file | |
e285c100 | 624 | * @change: The amount of usage change to record |
1e72c0f7 | 625 | * @qd: The quota data |
e285c100 | 626 | * @fdq: The updated limits to record |
18ec7d5c SW |
627 | * |
628 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
629 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
630 | * |
631 | * Returns: 0 or -ve on error | |
18ec7d5c | 632 | */ |
1e72c0f7 | 633 | |
18ec7d5c | 634 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
635 | s64 change, struct gfs2_quota_data *qd, |
636 | struct fs_disk_quota *fdq) | |
18ec7d5c | 637 | { |
feaa7bba | 638 | struct inode *inode = &ip->i_inode; |
14870b45 | 639 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
640 | struct address_space *mapping = inode->i_mapping; |
641 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 642 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 643 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 644 | struct buffer_head *bh; |
18ec7d5c | 645 | struct page *page; |
7e619bc3 AD |
646 | void *kaddr, *ptr; |
647 | struct gfs2_quota q, *qp; | |
648 | int err, nbytes; | |
e285c100 | 649 | u64 size; |
18ec7d5c | 650 | |
891a8e93 SW |
651 | if (gfs2_is_stuffed(ip)) { |
652 | err = gfs2_unstuff_dinode(ip, NULL); | |
653 | if (err) | |
654 | return err; | |
655 | } | |
7e619bc3 AD |
656 | |
657 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 658 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
659 | if (err < 0) |
660 | return err; | |
661 | ||
662 | err = -EIO; | |
663 | qp = &q; | |
664 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
665 | qp->qu_value += change; | |
666 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
667 | qd->qd_qb.qb_value = qp->qu_value; | |
668 | if (fdq) { | |
669 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 670 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
671 | qd->qd_qb.qb_warn = qp->qu_warn; |
672 | } | |
673 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 674 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
675 | qd->qd_qb.qb_limit = qp->qu_limit; |
676 | } | |
802ec9b6 AD |
677 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
678 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
679 | qd->qd_qb.qb_value = qp->qu_value; | |
680 | } | |
7e619bc3 AD |
681 | } |
682 | ||
683 | /* Write the quota into the quota file on disk */ | |
684 | ptr = qp; | |
685 | nbytes = sizeof(struct gfs2_quota); | |
686 | get_a_page: | |
220cca2a | 687 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
688 | if (!page) |
689 | return -ENOMEM; | |
690 | ||
691 | blocksize = inode->i_sb->s_blocksize; | |
692 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
693 | ||
694 | if (!page_has_buffers(page)) | |
695 | create_empty_buffers(page, blocksize, 0); | |
696 | ||
697 | bh = page_buffers(page); | |
698 | pos = blocksize; | |
699 | while (offset >= pos) { | |
700 | bh = bh->b_this_page; | |
701 | iblock++; | |
702 | pos += blocksize; | |
703 | } | |
704 | ||
705 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 706 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 707 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
708 | goto unlock_out; |
709 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
710 | if (buffer_new(bh)) |
711 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
712 | } |
713 | ||
714 | if (PageUptodate(page)) | |
715 | set_buffer_uptodate(bh); | |
716 | ||
717 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 718 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
719 | wait_on_buffer(bh); |
720 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 721 | goto unlock_out; |
18ec7d5c SW |
722 | } |
723 | ||
37f71577 | 724 | gfs2_trans_add_data(ip->i_gl, bh); |
18ec7d5c | 725 | |
d9349285 | 726 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
727 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
728 | nbytes = PAGE_CACHE_SIZE - offset; | |
729 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 730 | flush_dcache_page(page); |
d9349285 | 731 | kunmap_atomic(kaddr); |
7e619bc3 AD |
732 | unlock_page(page); |
733 | page_cache_release(page); | |
734 | ||
735 | /* If quota straddles page boundary, we need to update the rest of the | |
736 | * quota at the beginning of the next page */ | |
8b421601 | 737 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
738 | ptr = ptr + nbytes; |
739 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
740 | offset = 0; | |
741 | index++; | |
742 | goto get_a_page; | |
743 | } | |
e285c100 | 744 | |
e285c100 | 745 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 746 | if (size > inode->i_size) |
e285c100 | 747 | i_size_write(inode, size); |
e285c100 | 748 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 749 | mark_inode_dirty(inode); |
500242ac | 750 | return 0; |
ab9bbda0 | 751 | |
7e619bc3 | 752 | unlock_out: |
18ec7d5c SW |
753 | unlock_page(page); |
754 | page_cache_release(page); | |
755 | return err; | |
756 | } | |
757 | ||
b3b94faa DT |
758 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
759 | { | |
760 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 761 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
7b9cff46 | 762 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
b3b94faa DT |
763 | unsigned int data_blocks, ind_blocks; |
764 | struct gfs2_holder *ghs, i_gh; | |
765 | unsigned int qx, x; | |
766 | struct gfs2_quota_data *qd; | |
71f890f7 | 767 | unsigned reserved; |
f42faf4f | 768 | loff_t offset; |
20b95bf2 | 769 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
770 | int error; |
771 | ||
0a305e49 BP |
772 | error = gfs2_rs_alloc(ip); |
773 | if (error) | |
774 | return error; | |
775 | ||
b3b94faa DT |
776 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
777 | &data_blocks, &ind_blocks); | |
778 | ||
16c5f06f | 779 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
780 | if (!ghs) |
781 | return -ENOMEM; | |
782 | ||
783 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 784 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 785 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 786 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
787 | GL_NOCACHE, &ghs[qx]); |
788 | if (error) | |
789 | goto out; | |
790 | } | |
791 | ||
792 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
793 | if (error) | |
794 | goto out; | |
795 | ||
796 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 797 | offset = qd2offset(qda[x]); |
461cb419 BP |
798 | if (gfs2_write_alloc_required(ip, offset, |
799 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
800 | nalloc++; |
801 | } | |
802 | ||
20b95bf2 AD |
803 | /* |
804 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
805 | * block to the reservation unconditionally. If the inode | |
806 | * doesn't need unstuffing, the block will be released to the | |
807 | * rgrp since it won't be allocated during the transaction | |
808 | */ | |
7e619bc3 AD |
809 | /* +3 in the end for unstuffing block, inode size update block |
810 | * and another block in case quota straddles page boundary and | |
811 | * two blocks need to be updated instead of 1 */ | |
812 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 813 | |
71f890f7 | 814 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
7b9cff46 SW |
815 | ap.target = reserved; |
816 | error = gfs2_inplace_reserve(ip, &ap); | |
20b95bf2 AD |
817 | if (error) |
818 | goto out_alloc; | |
b3b94faa | 819 | |
20b95bf2 | 820 | if (nalloc) |
71f890f7 | 821 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
822 | |
823 | error = gfs2_trans_begin(sdp, blocks, 0); | |
824 | if (error) | |
825 | goto out_ipres; | |
b3b94faa DT |
826 | |
827 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
828 | qd = qda[x]; |
829 | offset = qd2offset(qd); | |
e285c100 | 830 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 831 | if (error) |
b3b94faa | 832 | goto out_end_trans; |
b3b94faa DT |
833 | |
834 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 835 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
836 | } |
837 | ||
838 | error = 0; | |
839 | ||
a91ea69f | 840 | out_end_trans: |
b3b94faa | 841 | gfs2_trans_end(sdp); |
a91ea69f | 842 | out_ipres: |
20b95bf2 | 843 | gfs2_inplace_release(ip); |
a91ea69f | 844 | out_alloc: |
b3b94faa | 845 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 846 | out: |
b3b94faa DT |
847 | while (qx--) |
848 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 849 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 850 | kfree(ghs); |
b09e593d | 851 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
852 | return error; |
853 | } | |
854 | ||
e285c100 SW |
855 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
856 | { | |
857 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
858 | struct gfs2_quota q; | |
859 | struct gfs2_quota_lvb *qlvb; | |
860 | loff_t pos; | |
861 | int error; | |
862 | ||
863 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
864 | pos = qd2offset(qd); | |
4306629e | 865 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
866 | if (error < 0) |
867 | return error; | |
868 | ||
4e2f8849 | 869 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
870 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
871 | qlvb->__pad = 0; | |
872 | qlvb->qb_limit = q.qu_limit; | |
873 | qlvb->qb_warn = q.qu_warn; | |
874 | qlvb->qb_value = q.qu_value; | |
875 | qd->qd_qb = *qlvb; | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
b3b94faa DT |
880 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
881 | struct gfs2_holder *q_gh) | |
882 | { | |
883 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 884 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 885 | struct gfs2_holder i_gh; |
b3b94faa DT |
886 | int error; |
887 | ||
a91ea69f | 888 | restart: |
b3b94faa DT |
889 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
890 | if (error) | |
891 | return error; | |
892 | ||
4e2f8849 | 893 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 894 | |
e9fc2aa0 | 895 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 896 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
897 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
898 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
899 | if (error) |
900 | return error; | |
901 | ||
e9fc2aa0 | 902 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
903 | if (error) |
904 | goto fail; | |
905 | ||
e285c100 SW |
906 | error = update_qd(sdp, qd); |
907 | if (error) | |
1e72c0f7 | 908 | goto fail_gunlock; |
b3b94faa | 909 | |
e285c100 | 910 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
911 | gfs2_glock_dq_uninit(q_gh); |
912 | force_refresh = 0; | |
913 | goto restart; | |
b3b94faa DT |
914 | } |
915 | ||
916 | return 0; | |
917 | ||
a91ea69f | 918 | fail_gunlock: |
b3b94faa | 919 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 920 | fail: |
b3b94faa | 921 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
922 | return error; |
923 | } | |
924 | ||
7c06b5d6 | 925 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 926 | { |
feaa7bba | 927 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 928 | struct gfs2_quota_data *qd; |
b3b94faa DT |
929 | unsigned int x; |
930 | int error = 0; | |
931 | ||
891a8e93 SW |
932 | error = gfs2_quota_hold(ip, uid, gid); |
933 | if (error) | |
934 | return error; | |
b3b94faa DT |
935 | |
936 | if (capable(CAP_SYS_RESOURCE) || | |
937 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
938 | return 0; | |
939 | ||
5407e242 BP |
940 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
941 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 942 | |
5407e242 | 943 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 944 | int force = NO_FORCE; |
5407e242 | 945 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
946 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
947 | force = FORCE; | |
5407e242 | 948 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
949 | if (error) |
950 | break; | |
951 | } | |
952 | ||
953 | if (!error) | |
954 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
955 | else { | |
956 | while (x--) | |
5407e242 | 957 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
958 | gfs2_quota_unhold(ip); |
959 | } | |
960 | ||
961 | return error; | |
962 | } | |
963 | ||
964 | static int need_sync(struct gfs2_quota_data *qd) | |
965 | { | |
966 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
967 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 968 | s64 value; |
b3b94faa DT |
969 | unsigned int num, den; |
970 | int do_sync = 1; | |
971 | ||
972 | if (!qd->qd_qb.qb_limit) | |
973 | return 0; | |
974 | ||
22077f57 | 975 | spin_lock(&qd_lru_lock); |
b3b94faa | 976 | value = qd->qd_change; |
22077f57 | 977 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
978 | |
979 | spin_lock(>->gt_spin); | |
980 | num = gt->gt_quota_scale_num; | |
981 | den = gt->gt_quota_scale_den; | |
982 | spin_unlock(>->gt_spin); | |
983 | ||
984 | if (value < 0) | |
985 | do_sync = 0; | |
e9fc2aa0 SW |
986 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
987 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
988 | do_sync = 0; |
989 | else { | |
990 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 991 | value = div_s64(value, den); |
e9fc2aa0 | 992 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 993 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
994 | do_sync = 0; |
995 | } | |
996 | ||
997 | return do_sync; | |
998 | } | |
999 | ||
1000 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1001 | { | |
aabd7c72 | 1002 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1003 | struct gfs2_quota_data *qda[4]; |
1004 | unsigned int count = 0; | |
1005 | unsigned int x; | |
aabd7c72 | 1006 | int found; |
b3b94faa DT |
1007 | |
1008 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1009 | goto out; | |
1010 | ||
5407e242 | 1011 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1012 | struct gfs2_quota_data *qd; |
1013 | int sync; | |
1014 | ||
5407e242 | 1015 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1016 | sync = need_sync(qd); |
1017 | ||
5407e242 | 1018 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
aabd7c72 SW |
1019 | if (!sync) |
1020 | continue; | |
1021 | ||
1022 | spin_lock(&qd_lru_lock); | |
1023 | found = qd_check_sync(sdp, qd, NULL); | |
1024 | spin_unlock(&qd_lru_lock); | |
1025 | ||
1026 | if (!found) | |
1027 | continue; | |
1028 | ||
1029 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
1030 | if (bh_get(qd)) { | |
1031 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
1032 | slot_put(qd); | |
1033 | qd_put(qd); | |
1034 | continue; | |
1035 | } | |
b3b94faa | 1036 | |
aabd7c72 | 1037 | qda[count++] = qd; |
b3b94faa DT |
1038 | } |
1039 | ||
1040 | if (count) { | |
1041 | do_sync(count, qda); | |
1042 | for (x = 0; x < count; x++) | |
1043 | qd_unlock(qda[x]); | |
1044 | } | |
1045 | ||
a91ea69f | 1046 | out: |
b3b94faa DT |
1047 | gfs2_quota_unhold(ip); |
1048 | } | |
1049 | ||
1050 | #define MAX_LINE 256 | |
1051 | ||
1052 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1053 | { | |
1054 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1055 | |
2ec46505 | 1056 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 | 1057 | sdp->sd_fsname, type, |
05e0a60d EB |
1058 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1059 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1060 | |
1061 | return 0; | |
1062 | } | |
1063 | ||
7c06b5d6 | 1064 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1065 | { |
feaa7bba | 1066 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1067 | struct gfs2_quota_data *qd; |
cd915493 | 1068 | s64 value; |
b3b94faa DT |
1069 | unsigned int x; |
1070 | int error = 0; | |
1071 | ||
1072 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1073 | return 0; | |
1074 | ||
1075 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1076 | return 0; | |
1077 | ||
5407e242 BP |
1078 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1079 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1080 | |
05e0a60d EB |
1081 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1082 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1083 | continue; |
1084 | ||
e9fc2aa0 | 1085 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1086 | spin_lock(&qd_lru_lock); |
b3b94faa | 1087 | value += qd->qd_change; |
22077f57 | 1088 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1089 | |
cd915493 | 1090 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1091 | print_message(qd, "exceeded"); |
05e0a60d | 1092 | quota_send_warning(qd->qd_id, |
2ec46505 SW |
1093 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1094 | ||
b3b94faa DT |
1095 | error = -EDQUOT; |
1096 | break; | |
e9fc2aa0 | 1097 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1098 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1099 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1100 | gfs2_tune_get(sdp, |
1101 | gt_quota_warn_period) * HZ)) { | |
05e0a60d | 1102 | quota_send_warning(qd->qd_id, |
2ec46505 | 1103 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1104 | error = print_message(qd, "warning"); |
1105 | qd->qd_last_warn = jiffies; | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | return error; | |
1110 | } | |
1111 | ||
cd915493 | 1112 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1113 | kuid_t uid, kgid_t gid) |
b3b94faa | 1114 | { |
b3b94faa DT |
1115 | struct gfs2_quota_data *qd; |
1116 | unsigned int x; | |
b3b94faa | 1117 | |
feaa7bba | 1118 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1119 | return; |
383f01fb | 1120 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1121 | return; |
1122 | ||
5407e242 BP |
1123 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1124 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1125 | |
05e0a60d EB |
1126 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1127 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1128 | do_qc(qd, change); |
b3b94faa DT |
1129 | } |
1130 | } | |
1131 | } | |
1132 | ||
ceed1723 | 1133 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1134 | { |
8c42d637 | 1135 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa | 1136 | struct gfs2_quota_data **qda; |
bef292a7 | 1137 | unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder); |
b3b94faa DT |
1138 | unsigned int num_qd; |
1139 | unsigned int x; | |
1140 | int error = 0; | |
1141 | ||
b3b94faa DT |
1142 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
1143 | if (!qda) | |
1144 | return -ENOMEM; | |
1145 | ||
e46c772d SW |
1146 | mutex_lock(&sdp->sd_quota_sync_mutex); |
1147 | sdp->sd_quota_sync_gen++; | |
1148 | ||
b3b94faa DT |
1149 | do { |
1150 | num_qd = 0; | |
1151 | ||
1152 | for (;;) { | |
1153 | error = qd_fish(sdp, qda + num_qd); | |
1154 | if (error || !qda[num_qd]) | |
1155 | break; | |
1156 | if (++num_qd == max_qd) | |
1157 | break; | |
1158 | } | |
1159 | ||
1160 | if (num_qd) { | |
1161 | if (!error) | |
1162 | error = do_sync(num_qd, qda); | |
1163 | if (!error) | |
1164 | for (x = 0; x < num_qd; x++) | |
1165 | qda[x]->qd_sync_gen = | |
1166 | sdp->sd_quota_sync_gen; | |
1167 | ||
1168 | for (x = 0; x < num_qd; x++) | |
1169 | qd_unlock(qda[x]); | |
1170 | } | |
1171 | } while (!error && num_qd == max_qd); | |
1172 | ||
e46c772d | 1173 | mutex_unlock(&sdp->sd_quota_sync_mutex); |
b3b94faa DT |
1174 | kfree(qda); |
1175 | ||
1176 | return error; | |
1177 | } | |
1178 | ||
ed87dabc | 1179 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1180 | { |
1181 | struct gfs2_quota_data *qd; | |
1182 | struct gfs2_holder q_gh; | |
1183 | int error; | |
1184 | ||
05e0a60d | 1185 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1186 | if (error) |
1187 | return error; | |
1188 | ||
1189 | error = do_glock(qd, FORCE, &q_gh); | |
1190 | if (!error) | |
1191 | gfs2_glock_dq_uninit(&q_gh); | |
1192 | ||
1193 | qd_put(qd); | |
b3b94faa DT |
1194 | return error; |
1195 | } | |
1196 | ||
bb8d8a6f SW |
1197 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1198 | { | |
1199 | const struct gfs2_quota_change *str = buf; | |
1200 | ||
1201 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1202 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
e08d8d7f EB |
1203 | qc->qc_id = make_kqid(&init_user_ns, |
1204 | (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA, | |
1205 | be32_to_cpu(str->qc_id)); | |
bb8d8a6f SW |
1206 | } |
1207 | ||
b3b94faa DT |
1208 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1209 | { | |
feaa7bba | 1210 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1211 | u64 size = i_size_read(sdp->sd_qc_inode); |
1212 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1213 | unsigned int x, slot = 0; |
1214 | unsigned int found = 0; | |
cd915493 SW |
1215 | u64 dblock; |
1216 | u32 extlen = 0; | |
b3b94faa DT |
1217 | int error; |
1218 | ||
a2e0f799 | 1219 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1220 | return -EIO; |
a2e0f799 | 1221 | |
b3b94faa | 1222 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
5c676f6d | 1223 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1224 | |
1225 | error = -ENOMEM; | |
1226 | ||
1227 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1228 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1229 | if (!sdp->sd_quota_bitmap) |
1230 | return error; | |
1231 | ||
1232 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1233 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1234 | if (!sdp->sd_quota_bitmap[x]) |
1235 | goto fail; | |
1236 | } | |
1237 | ||
1238 | for (x = 0; x < blocks; x++) { | |
1239 | struct buffer_head *bh; | |
1240 | unsigned int y; | |
1241 | ||
1242 | if (!extlen) { | |
1243 | int new = 0; | |
feaa7bba | 1244 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1245 | if (error) |
1246 | goto fail; | |
1247 | } | |
b3b94faa | 1248 | error = -EIO; |
7276b3b0 SW |
1249 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1250 | if (!bh) | |
1251 | goto fail; | |
b3b94faa DT |
1252 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1253 | brelse(bh); | |
1254 | goto fail; | |
1255 | } | |
1256 | ||
7276b3b0 | 1257 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1258 | y++, slot++) { |
b62f963e | 1259 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1260 | struct gfs2_quota_data *qd; |
1261 | ||
1262 | gfs2_quota_change_in(&qc, bh->b_data + | |
1263 | sizeof(struct gfs2_meta_header) + | |
1264 | y * sizeof(struct gfs2_quota_change)); | |
1265 | if (!qc.qc_change) | |
1266 | continue; | |
1267 | ||
05e0a60d | 1268 | error = qd_alloc(sdp, qc.qc_id, &qd); |
b3b94faa DT |
1269 | if (error) { |
1270 | brelse(bh); | |
1271 | goto fail; | |
1272 | } | |
1273 | ||
1274 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1275 | qd->qd_change = qc.qc_change; | |
1276 | qd->qd_slot = slot; | |
1277 | qd->qd_slot_count = 1; | |
b3b94faa | 1278 | |
0a7ab79c | 1279 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1280 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1281 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1282 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1283 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1284 | |
1285 | found++; | |
1286 | } | |
1287 | ||
1288 | brelse(bh); | |
1289 | dblock++; | |
1290 | extlen--; | |
1291 | } | |
1292 | ||
1293 | if (found) | |
1294 | fs_info(sdp, "found %u quota changes\n", found); | |
1295 | ||
1296 | return 0; | |
1297 | ||
a91ea69f | 1298 | fail: |
b3b94faa DT |
1299 | gfs2_quota_cleanup(sdp); |
1300 | return error; | |
1301 | } | |
1302 | ||
b3b94faa DT |
1303 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1304 | { | |
1305 | struct list_head *head = &sdp->sd_quota_list; | |
1306 | struct gfs2_quota_data *qd; | |
1307 | unsigned int x; | |
1308 | ||
0a7ab79c | 1309 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1310 | while (!list_empty(head)) { |
1311 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1312 | ||
9b9f039d SW |
1313 | /* |
1314 | * To be removed in due course... we should be able to | |
1315 | * ensure that all refs to the qd have done by this point | |
1316 | * so that this rather odd test is not required | |
1317 | */ | |
1318 | spin_lock(&qd->qd_lockref.lock); | |
1319 | if (qd->qd_lockref.count > 1 || | |
1320 | (qd->qd_lockref.count && !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
1321 | spin_unlock(&qd->qd_lockref.lock); | |
0a7ab79c AD |
1322 | list_move(&qd->qd_list, head); |
1323 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1324 | schedule(); |
0a7ab79c | 1325 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1326 | continue; |
1327 | } | |
9b9f039d | 1328 | spin_unlock(&qd->qd_lockref.lock); |
b3b94faa DT |
1329 | |
1330 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1331 | /* Also remove if this qd exists in the reclaim list */ |
1332 | if (!list_empty(&qd->qd_reclaim)) { | |
1333 | list_del_init(&qd->qd_reclaim); | |
1334 | atomic_dec(&qd_lru_count); | |
1335 | } | |
b3b94faa | 1336 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1337 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1338 | |
9b9f039d | 1339 | if (!qd->qd_lockref.count) { |
b3b94faa DT |
1340 | gfs2_assert_warn(sdp, !qd->qd_change); |
1341 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1342 | } else | |
1343 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1344 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1345 | ||
f057f6cd | 1346 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1347 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1348 | |
0a7ab79c | 1349 | spin_lock(&qd_lru_lock); |
b3b94faa | 1350 | } |
0a7ab79c | 1351 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1352 | |
1353 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1354 | ||
1355 | if (sdp->sd_quota_bitmap) { | |
1356 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1357 | kfree(sdp->sd_quota_bitmap[x]); | |
1358 | kfree(sdp->sd_quota_bitmap); | |
1359 | } | |
1360 | } | |
1361 | ||
37b2c837 SW |
1362 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1363 | { | |
1364 | if (error == 0 || error == -EROFS) | |
1365 | return; | |
1366 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1367 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1368 | } | |
1369 | ||
1370 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1371 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1372 | unsigned long t, unsigned long *timeo, |
1373 | unsigned int *new_timeo) | |
1374 | { | |
1375 | if (t >= *timeo) { | |
8c42d637 | 1376 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1377 | quotad_error(sdp, msg, error); |
1378 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1379 | } else { | |
1380 | *timeo -= t; | |
1381 | } | |
1382 | } | |
1383 | ||
813e0c46 SW |
1384 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1385 | { | |
1386 | struct gfs2_inode *ip; | |
1387 | ||
1388 | while(1) { | |
1389 | ip = NULL; | |
1390 | spin_lock(&sdp->sd_trunc_lock); | |
1391 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1392 | ip = list_entry(sdp->sd_trunc_list.next, | |
1393 | struct gfs2_inode, i_trunc_list); | |
1394 | list_del_init(&ip->i_trunc_list); | |
1395 | } | |
1396 | spin_unlock(&sdp->sd_trunc_lock); | |
1397 | if (ip == NULL) | |
1398 | return; | |
1399 | gfs2_glock_finish_truncate(ip); | |
1400 | } | |
1401 | } | |
1402 | ||
3d3c10f2 BM |
1403 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1404 | if (!sdp->sd_statfs_force_sync) { | |
1405 | sdp->sd_statfs_force_sync = 1; | |
1406 | wake_up(&sdp->sd_quota_wait); | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | ||
37b2c837 SW |
1411 | /** |
1412 | * gfs2_quotad - Write cached quota changes into the quota file | |
1413 | * @sdp: Pointer to GFS2 superblock | |
1414 | * | |
1415 | */ | |
1416 | ||
1417 | int gfs2_quotad(void *data) | |
1418 | { | |
1419 | struct gfs2_sbd *sdp = data; | |
1420 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1421 | unsigned long statfs_timeo = 0; | |
1422 | unsigned long quotad_timeo = 0; | |
1423 | unsigned long t = 0; | |
1424 | DEFINE_WAIT(wait); | |
813e0c46 | 1425 | int empty; |
37b2c837 SW |
1426 | |
1427 | while (!kthread_should_stop()) { | |
1428 | ||
1429 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1430 | if (sdp->sd_statfs_force_sync) { |
1431 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1432 | quotad_error(sdp, "statfs", error); | |
1433 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1434 | } | |
1435 | else | |
1436 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1437 | &statfs_timeo, | |
1438 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1439 | |
1440 | /* Update quota file */ | |
edd2e9ac | 1441 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1442 | "ad_timeo, &tune->gt_quota_quantum); |
1443 | ||
813e0c46 SW |
1444 | /* Check for & recover partially truncated inodes */ |
1445 | quotad_check_trunc_list(sdp); | |
1446 | ||
a0acae0e TH |
1447 | try_to_freeze(); |
1448 | ||
37b2c837 SW |
1449 | t = min(quotad_timeo, statfs_timeo); |
1450 | ||
7fa5d20d | 1451 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1452 | spin_lock(&sdp->sd_trunc_lock); |
1453 | empty = list_empty(&sdp->sd_trunc_list); | |
1454 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1455 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1456 | t -= schedule_timeout(t); |
1457 | else | |
1458 | t = 0; | |
37b2c837 SW |
1459 | finish_wait(&sdp->sd_quota_wait, &wait); |
1460 | } | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
1d371b5e SW |
1465 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1466 | struct fs_quota_stat *fqs) | |
1467 | { | |
1468 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1469 | ||
1470 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1471 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1472 | |
1473 | switch (sdp->sd_args.ar_quota) { | |
1474 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1475 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1476 | /*FALLTHRU*/ |
1477 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1478 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1479 | break; |
1480 | case GFS2_QUOTA_OFF: | |
1481 | break; | |
1482 | } | |
1483 | ||
1d371b5e SW |
1484 | if (sdp->sd_quota_inode) { |
1485 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1486 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1487 | } | |
1488 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1489 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1490 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1491 | return 0; | |
1492 | } | |
1493 | ||
74a8a103 | 1494 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1495 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1496 | { |
1497 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1498 | struct gfs2_quota_lvb *qlvb; | |
1499 | struct gfs2_quota_data *qd; | |
1500 | struct gfs2_holder q_gh; | |
1501 | int error; | |
1502 | ||
1503 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1504 | ||
1505 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1506 | return -ESRCH; /* Crazy XFS error code */ | |
1507 | ||
236c64e4 EB |
1508 | if ((qid.type != USRQUOTA) && |
1509 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1510 | return -EINVAL; |
1511 | ||
05e0a60d | 1512 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1513 | if (error) |
1514 | return error; | |
1515 | error = do_glock(qd, FORCE, &q_gh); | |
1516 | if (error) | |
1517 | goto out; | |
1518 | ||
4e2f8849 | 1519 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1520 | fdq->d_version = FS_DQUOT_VERSION; |
236c64e4 | 1521 | fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1522 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1523 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1524 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1525 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1526 | |
1527 | gfs2_glock_dq_uninit(&q_gh); | |
1528 | out: | |
1529 | qd_put(qd); | |
1530 | return error; | |
1531 | } | |
1532 | ||
e285c100 | 1533 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1534 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1535 | |
74a8a103 | 1536 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1537 | struct fs_disk_quota *fdq) |
e285c100 SW |
1538 | { |
1539 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1540 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1541 | struct gfs2_quota_data *qd; | |
1542 | struct gfs2_holder q_gh, i_gh; | |
1543 | unsigned int data_blocks, ind_blocks; | |
1544 | unsigned int blocks = 0; | |
1545 | int alloc_required; | |
e285c100 SW |
1546 | loff_t offset; |
1547 | int error; | |
1548 | ||
1549 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1550 | return -ESRCH; /* Crazy XFS error code */ | |
1551 | ||
236c64e4 EB |
1552 | if ((qid.type != USRQUOTA) && |
1553 | (qid.type != GRPQUOTA)) | |
e285c100 | 1554 | return -EINVAL; |
e285c100 SW |
1555 | |
1556 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1557 | return -EINVAL; | |
e285c100 | 1558 | |
05e0a60d | 1559 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1560 | if (error) |
1561 | return error; | |
1562 | ||
0a305e49 BP |
1563 | error = gfs2_rs_alloc(ip); |
1564 | if (error) | |
1565 | goto out_put; | |
1566 | ||
e285c100 SW |
1567 | mutex_lock(&ip->i_inode.i_mutex); |
1568 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1569 | if (error) | |
0a305e49 | 1570 | goto out_unlockput; |
e285c100 SW |
1571 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1572 | if (error) | |
1573 | goto out_q; | |
1574 | ||
1575 | /* Check for existing entry, if none then alloc new blocks */ | |
1576 | error = update_qd(sdp, qd); | |
1577 | if (error) | |
1578 | goto out_i; | |
1579 | ||
1580 | /* If nothing has changed, this is a no-op */ | |
1581 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1582 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1583 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1584 | |
e285c100 | 1585 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1586 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1587 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1588 | |
1589 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1590 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1591 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1592 | ||
e285c100 SW |
1593 | if (fdq->d_fieldmask == 0) |
1594 | goto out_i; | |
1595 | ||
1596 | offset = qd2offset(qd); | |
461cb419 | 1597 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1598 | if (gfs2_is_stuffed(ip)) |
1599 | alloc_required = 1; | |
e285c100 | 1600 | if (alloc_required) { |
7b9cff46 | 1601 | struct gfs2_alloc_parms ap = { .aflags = 0, }; |
e285c100 SW |
1602 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1603 | &data_blocks, &ind_blocks); | |
564e12b1 | 1604 | blocks = 1 + data_blocks + ind_blocks; |
7b9cff46 SW |
1605 | ap.target = blocks; |
1606 | error = gfs2_inplace_reserve(ip, &ap); | |
e285c100 | 1607 | if (error) |
564e12b1 | 1608 | goto out_i; |
71f890f7 | 1609 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1610 | } |
1611 | ||
e79a46a0 AD |
1612 | /* Some quotas span block boundaries and can update two blocks, |
1613 | adding an extra block to the transaction to handle such quotas */ | |
1614 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1615 | if (error) |
1616 | goto out_release; | |
1617 | ||
1618 | /* Apply changes */ | |
1619 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1620 | ||
1621 | gfs2_trans_end(sdp); | |
1622 | out_release: | |
564e12b1 | 1623 | if (alloc_required) |
e285c100 | 1624 | gfs2_inplace_release(ip); |
e285c100 SW |
1625 | out_i: |
1626 | gfs2_glock_dq_uninit(&i_gh); | |
1627 | out_q: | |
1628 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1629 | out_unlockput: |
e285c100 | 1630 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1631 | out_put: |
e285c100 SW |
1632 | qd_put(qd); |
1633 | return error; | |
1634 | } | |
1635 | ||
cc632e7f SW |
1636 | const struct quotactl_ops gfs2_quotactl_ops = { |
1637 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1638 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1639 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1640 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1641 | }; |