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> |
b3b94faa DT |
53 | |
54 | #include "gfs2.h" | |
5c676f6d | 55 | #include "incore.h" |
b3b94faa DT |
56 | #include "bmap.h" |
57 | #include "glock.h" | |
58 | #include "glops.h" | |
b3b94faa DT |
59 | #include "log.h" |
60 | #include "meta_io.h" | |
61 | #include "quota.h" | |
62 | #include "rgrp.h" | |
63 | #include "super.h" | |
64 | #include "trans.h" | |
18ec7d5c | 65 | #include "inode.h" |
5c676f6d | 66 | #include "util.h" |
b3b94faa | 67 | |
bb8d8a6f SW |
68 | struct gfs2_quota_change_host { |
69 | u64 qc_change; | |
70 | u32 qc_flags; /* GFS2_QCF_... */ | |
e08d8d7f | 71 | struct kqid qc_id; |
bb8d8a6f SW |
72 | }; |
73 | ||
0a7ab79c AD |
74 | static LIST_HEAD(qd_lru_list); |
75 | static atomic_t qd_lru_count = ATOMIC_INIT(0); | |
1328df72 | 76 | static DEFINE_SPINLOCK(qd_lru_lock); |
0a7ab79c | 77 | |
1ab6c499 DC |
78 | unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink, |
79 | struct shrink_control *sc) | |
0a7ab79c AD |
80 | { |
81 | struct gfs2_quota_data *qd; | |
82 | struct gfs2_sbd *sdp; | |
1495f230 | 83 | int nr_to_scan = sc->nr_to_scan; |
1ab6c499 | 84 | long freed = 0; |
0a7ab79c | 85 | |
1495f230 | 86 | if (!(sc->gfp_mask & __GFP_FS)) |
1ab6c499 | 87 | return SHRINK_STOP; |
0a7ab79c AD |
88 | |
89 | spin_lock(&qd_lru_lock); | |
1495f230 | 90 | while (nr_to_scan && !list_empty(&qd_lru_list)) { |
0a7ab79c AD |
91 | qd = list_entry(qd_lru_list.next, |
92 | struct gfs2_quota_data, qd_reclaim); | |
93 | sdp = qd->qd_gl->gl_sbd; | |
94 | ||
95 | /* Free from the filesystem-specific list */ | |
96 | list_del(&qd->qd_list); | |
97 | ||
0a7ab79c AD |
98 | gfs2_assert_warn(sdp, !qd->qd_change); |
99 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
100 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
101 | ||
f057f6cd | 102 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
103 | atomic_dec(&sdp->sd_quota_count); |
104 | ||
105 | /* Delete it from the common reclaim list */ | |
106 | list_del_init(&qd->qd_reclaim); | |
107 | atomic_dec(&qd_lru_count); | |
108 | spin_unlock(&qd_lru_lock); | |
109 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
110 | spin_lock(&qd_lru_lock); | |
1495f230 | 111 | nr_to_scan--; |
1ab6c499 | 112 | freed++; |
0a7ab79c AD |
113 | } |
114 | spin_unlock(&qd_lru_lock); | |
1ab6c499 DC |
115 | return freed; |
116 | } | |
0a7ab79c | 117 | |
1ab6c499 DC |
118 | unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, |
119 | struct shrink_control *sc) | |
120 | { | |
55f841ce | 121 | return vfs_pressure_ratio(atomic_read(&qd_lru_count)); |
0a7ab79c AD |
122 | } |
123 | ||
2f6c9896 EB |
124 | static u64 qd2index(struct gfs2_quota_data *qd) |
125 | { | |
05e0a60d EB |
126 | struct kqid qid = qd->qd_id; |
127 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
37f71577 | 128 | ((qid.type == USRQUOTA) ? 0 : 1); |
2f6c9896 EB |
129 | } |
130 | ||
cd915493 | 131 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 132 | { |
cd915493 | 133 | u64 offset; |
b3b94faa | 134 | |
2f6c9896 | 135 | offset = qd2index(qd); |
b3b94faa DT |
136 | offset *= sizeof(struct gfs2_quota); |
137 | ||
138 | return offset; | |
139 | } | |
140 | ||
05e0a60d | 141 | static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
142 | struct gfs2_quota_data **qdp) |
143 | { | |
144 | struct gfs2_quota_data *qd; | |
145 | int error; | |
146 | ||
37b2c837 | 147 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
148 | if (!qd) |
149 | return -ENOMEM; | |
150 | ||
0a7ab79c | 151 | atomic_set(&qd->qd_count, 1); |
05e0a60d | 152 | qd->qd_id = qid; |
b3b94faa | 153 | qd->qd_slot = -1; |
0a7ab79c | 154 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 155 | |
2f6c9896 | 156 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
157 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
158 | if (error) | |
159 | goto fail; | |
160 | ||
b3b94faa DT |
161 | *qdp = qd; |
162 | ||
163 | return 0; | |
164 | ||
a91ea69f | 165 | fail: |
37b2c837 | 166 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
167 | return error; |
168 | } | |
169 | ||
05e0a60d | 170 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
171 | struct gfs2_quota_data **qdp) |
172 | { | |
173 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
174 | int error, found; | |
175 | ||
176 | *qdp = NULL; | |
177 | ||
178 | for (;;) { | |
179 | found = 0; | |
0a7ab79c | 180 | spin_lock(&qd_lru_lock); |
b3b94faa | 181 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
05e0a60d | 182 | if (qid_eq(qd->qd_id, qid)) { |
0a7ab79c AD |
183 | if (!atomic_read(&qd->qd_count) && |
184 | !list_empty(&qd->qd_reclaim)) { | |
185 | /* Remove it from reclaim list */ | |
186 | list_del_init(&qd->qd_reclaim); | |
187 | atomic_dec(&qd_lru_count); | |
188 | } | |
189 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
190 | found = 1; |
191 | break; | |
192 | } | |
193 | } | |
194 | ||
195 | if (!found) | |
196 | qd = NULL; | |
197 | ||
198 | if (!qd && new_qd) { | |
199 | qd = new_qd; | |
200 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
201 | atomic_inc(&sdp->sd_quota_count); | |
202 | new_qd = NULL; | |
203 | } | |
204 | ||
0a7ab79c | 205 | spin_unlock(&qd_lru_lock); |
b3b94faa | 206 | |
6a6ada81 | 207 | if (qd) { |
b3b94faa | 208 | if (new_qd) { |
f057f6cd | 209 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 210 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
211 | } |
212 | *qdp = qd; | |
213 | return 0; | |
214 | } | |
215 | ||
05e0a60d | 216 | error = qd_alloc(sdp, qid, &new_qd); |
b3b94faa DT |
217 | if (error) |
218 | return error; | |
219 | } | |
220 | } | |
221 | ||
222 | static void qd_hold(struct gfs2_quota_data *qd) | |
223 | { | |
224 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
0a7ab79c AD |
225 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
226 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
227 | } |
228 | ||
229 | static void qd_put(struct gfs2_quota_data *qd) | |
230 | { | |
0a7ab79c AD |
231 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
232 | /* Add to the reclaim list */ | |
233 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
234 | atomic_inc(&qd_lru_count); | |
235 | spin_unlock(&qd_lru_lock); | |
236 | } | |
b3b94faa DT |
237 | } |
238 | ||
239 | static int slot_get(struct gfs2_quota_data *qd) | |
240 | { | |
241 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
242 | unsigned int c, o = 0, b; | |
243 | unsigned char byte = 0; | |
244 | ||
22077f57 | 245 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
246 | |
247 | if (qd->qd_slot_count++) { | |
22077f57 | 248 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
249 | return 0; |
250 | } | |
251 | ||
252 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
253 | for (o = 0; o < PAGE_SIZE; o++) { | |
254 | byte = sdp->sd_quota_bitmap[c][o]; | |
255 | if (byte != 0xFF) | |
256 | goto found; | |
257 | } | |
258 | ||
259 | goto fail; | |
260 | ||
a91ea69f | 261 | found: |
b3b94faa DT |
262 | for (b = 0; b < 8; b++) |
263 | if (!(byte & (1 << b))) | |
264 | break; | |
265 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
266 | ||
267 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
268 | goto fail; | |
269 | ||
270 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
271 | ||
22077f57 | 272 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
273 | |
274 | return 0; | |
275 | ||
a91ea69f | 276 | fail: |
b3b94faa | 277 | qd->qd_slot_count--; |
22077f57 | 278 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
279 | return -ENOSPC; |
280 | } | |
281 | ||
282 | static void slot_hold(struct gfs2_quota_data *qd) | |
283 | { | |
284 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
285 | ||
22077f57 | 286 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
287 | gfs2_assert(sdp, qd->qd_slot_count); |
288 | qd->qd_slot_count++; | |
22077f57 | 289 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
290 | } |
291 | ||
292 | static void slot_put(struct gfs2_quota_data *qd) | |
293 | { | |
294 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
295 | ||
22077f57 | 296 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
297 | gfs2_assert(sdp, qd->qd_slot_count); |
298 | if (!--qd->qd_slot_count) { | |
299 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
300 | qd->qd_slot = -1; | |
301 | } | |
22077f57 | 302 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
303 | } |
304 | ||
305 | static int bh_get(struct gfs2_quota_data *qd) | |
306 | { | |
307 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 308 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 309 | unsigned int block, offset; |
b3b94faa DT |
310 | struct buffer_head *bh; |
311 | int error; | |
23591256 | 312 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 313 | |
f55ab26a | 314 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
315 | |
316 | if (qd->qd_bh_count++) { | |
f55ab26a | 317 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
318 | return 0; |
319 | } | |
320 | ||
321 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 322 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 323 | |
23591256 | 324 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 325 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
326 | if (error) |
327 | goto fail; | |
7276b3b0 | 328 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
329 | if (error) |
330 | goto fail; | |
331 | error = -EIO; | |
332 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
333 | goto fail_brelse; | |
334 | ||
335 | qd->qd_bh = bh; | |
336 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
337 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
338 | offset * sizeof(struct gfs2_quota_change)); | |
339 | ||
2e95b665 | 340 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
341 | |
342 | return 0; | |
343 | ||
a91ea69f | 344 | fail_brelse: |
b3b94faa | 345 | brelse(bh); |
a91ea69f | 346 | fail: |
b3b94faa | 347 | qd->qd_bh_count--; |
f55ab26a | 348 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
349 | return error; |
350 | } | |
351 | ||
352 | static void bh_put(struct gfs2_quota_data *qd) | |
353 | { | |
354 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
355 | ||
f55ab26a | 356 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
357 | gfs2_assert(sdp, qd->qd_bh_count); |
358 | if (!--qd->qd_bh_count) { | |
359 | brelse(qd->qd_bh); | |
360 | qd->qd_bh = NULL; | |
361 | qd->qd_bh_qc = NULL; | |
362 | } | |
f55ab26a | 363 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
364 | } |
365 | ||
366 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
367 | { | |
368 | struct gfs2_quota_data *qd = NULL; | |
369 | int error; | |
370 | int found = 0; | |
371 | ||
372 | *qdp = NULL; | |
373 | ||
374 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
375 | return 0; | |
376 | ||
0a7ab79c | 377 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
378 | |
379 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
380 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
381 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
382 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
383 | continue; | |
384 | ||
385 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
386 | ||
387 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
388 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
389 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
390 | qd->qd_change_sync = qd->qd_change; |
391 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
392 | qd->qd_slot_count++; | |
393 | found = 1; | |
394 | ||
395 | break; | |
396 | } | |
397 | ||
398 | if (!found) | |
399 | qd = NULL; | |
400 | ||
0a7ab79c | 401 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
402 | |
403 | if (qd) { | |
404 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
405 | error = bh_get(qd); | |
406 | if (error) { | |
407 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
408 | slot_put(qd); | |
409 | qd_put(qd); | |
410 | return error; | |
411 | } | |
412 | } | |
413 | ||
414 | *qdp = qd; | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | static int qd_trylock(struct gfs2_quota_data *qd) | |
420 | { | |
421 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
422 | ||
423 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
424 | return 0; | |
425 | ||
0a7ab79c | 426 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
427 | |
428 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
429 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 430 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
431 | return 0; |
432 | } | |
433 | ||
434 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
435 | ||
436 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
437 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
438 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
439 | qd->qd_change_sync = qd->qd_change; |
440 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
441 | qd->qd_slot_count++; | |
442 | ||
0a7ab79c | 443 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
444 | |
445 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
446 | if (bh_get(qd)) { | |
447 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
448 | slot_put(qd); | |
449 | qd_put(qd); | |
450 | return 0; | |
451 | } | |
452 | ||
453 | return 1; | |
454 | } | |
455 | ||
456 | static void qd_unlock(struct gfs2_quota_data *qd) | |
457 | { | |
568f4c96 SW |
458 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
459 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
460 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
461 | bh_put(qd); | |
462 | slot_put(qd); | |
463 | qd_put(qd); | |
464 | } | |
465 | ||
b59c8b6f | 466 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
467 | struct gfs2_quota_data **qdp) |
468 | { | |
469 | int error; | |
470 | ||
05e0a60d | 471 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
472 | if (error) |
473 | return error; | |
474 | ||
475 | error = slot_get(*qdp); | |
476 | if (error) | |
477 | goto fail; | |
478 | ||
479 | error = bh_get(*qdp); | |
480 | if (error) | |
481 | goto fail_slot; | |
482 | ||
483 | return 0; | |
484 | ||
a91ea69f | 485 | fail_slot: |
b3b94faa | 486 | slot_put(*qdp); |
a91ea69f | 487 | fail: |
b3b94faa DT |
488 | qd_put(*qdp); |
489 | return error; | |
490 | } | |
491 | ||
492 | static void qdsb_put(struct gfs2_quota_data *qd) | |
493 | { | |
494 | bh_put(qd); | |
495 | slot_put(qd); | |
496 | qd_put(qd); | |
497 | } | |
498 | ||
7c06b5d6 | 499 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 500 | { |
feaa7bba | 501 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 502 | struct gfs2_quota_data **qd; |
b3b94faa DT |
503 | int error; |
504 | ||
aaaf68c5 AP |
505 | if (ip->i_res == NULL) { |
506 | error = gfs2_rs_alloc(ip); | |
507 | if (error) | |
508 | return error; | |
509 | } | |
5407e242 BP |
510 | |
511 | qd = ip->i_res->rs_qa_qd; | |
512 | ||
513 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
514 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
515 | return -EIO; | |
516 | ||
517 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
518 | return 0; | |
519 | ||
b59c8b6f | 520 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
521 | if (error) |
522 | goto out; | |
5407e242 | 523 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
524 | qd++; |
525 | ||
b59c8b6f | 526 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
527 | if (error) |
528 | goto out; | |
5407e242 | 529 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
530 | qd++; |
531 | ||
6b24c0d2 EB |
532 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
533 | !uid_eq(uid, ip->i_inode.i_uid)) { | |
b59c8b6f | 534 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
535 | if (error) |
536 | goto out; | |
5407e242 | 537 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
538 | qd++; |
539 | } | |
540 | ||
6b24c0d2 EB |
541 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
542 | !gid_eq(gid, ip->i_inode.i_gid)) { | |
b59c8b6f | 543 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
544 | if (error) |
545 | goto out; | |
5407e242 | 546 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
547 | qd++; |
548 | } | |
549 | ||
a91ea69f | 550 | out: |
b3b94faa DT |
551 | if (error) |
552 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
553 | return error; |
554 | } | |
555 | ||
556 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
557 | { | |
feaa7bba | 558 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
559 | unsigned int x; |
560 | ||
5407e242 BP |
561 | if (ip->i_res == NULL) |
562 | return; | |
b3b94faa DT |
563 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
564 | ||
5407e242 BP |
565 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
566 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
567 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 568 | } |
5407e242 | 569 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
570 | } |
571 | ||
572 | static int sort_qd(const void *a, const void *b) | |
573 | { | |
48fac179 SW |
574 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
575 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 576 | |
05e0a60d | 577 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 578 | return -1; |
05e0a60d | 579 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 580 | return 1; |
48fac179 | 581 | return 0; |
b3b94faa DT |
582 | } |
583 | ||
cd915493 | 584 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
585 | { |
586 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 587 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 588 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 589 | s64 x; |
b3b94faa | 590 | |
f55ab26a | 591 | mutex_lock(&sdp->sd_quota_mutex); |
350a9b0a | 592 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
b3b94faa DT |
593 | |
594 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
595 | qc->qc_change = 0; | |
596 | qc->qc_flags = 0; | |
05e0a60d | 597 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 598 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 599 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
600 | } |
601 | ||
b44b84d7 | 602 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
603 | qc->qc_change = cpu_to_be64(x); |
604 | ||
22077f57 | 605 | spin_lock(&qd_lru_lock); |
b3b94faa | 606 | qd->qd_change = x; |
22077f57 | 607 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
608 | |
609 | if (!x) { | |
610 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
611 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
612 | qc->qc_flags = 0; | |
613 | qc->qc_id = 0; | |
614 | slot_put(qd); | |
615 | qd_put(qd); | |
616 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
617 | qd_hold(qd); | |
618 | slot_hold(qd); | |
619 | } | |
907b9bce | 620 | |
f55ab26a | 621 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
622 | } |
623 | ||
18ec7d5c | 624 | /** |
1e72c0f7 SW |
625 | * gfs2_adjust_quota - adjust record of current block usage |
626 | * @ip: The quota inode | |
627 | * @loc: Offset of the entry in the quota file | |
e285c100 | 628 | * @change: The amount of usage change to record |
1e72c0f7 | 629 | * @qd: The quota data |
e285c100 | 630 | * @fdq: The updated limits to record |
18ec7d5c SW |
631 | * |
632 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
633 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
634 | * |
635 | * Returns: 0 or -ve on error | |
18ec7d5c | 636 | */ |
1e72c0f7 | 637 | |
18ec7d5c | 638 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
639 | s64 change, struct gfs2_quota_data *qd, |
640 | struct fs_disk_quota *fdq) | |
18ec7d5c | 641 | { |
feaa7bba | 642 | struct inode *inode = &ip->i_inode; |
14870b45 | 643 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
644 | struct address_space *mapping = inode->i_mapping; |
645 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 646 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 647 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 648 | struct buffer_head *bh; |
18ec7d5c | 649 | struct page *page; |
7e619bc3 AD |
650 | void *kaddr, *ptr; |
651 | struct gfs2_quota q, *qp; | |
652 | int err, nbytes; | |
e285c100 | 653 | u64 size; |
18ec7d5c | 654 | |
891a8e93 SW |
655 | if (gfs2_is_stuffed(ip)) { |
656 | err = gfs2_unstuff_dinode(ip, NULL); | |
657 | if (err) | |
658 | return err; | |
659 | } | |
7e619bc3 AD |
660 | |
661 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 662 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
663 | if (err < 0) |
664 | return err; | |
665 | ||
666 | err = -EIO; | |
667 | qp = &q; | |
668 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
669 | qp->qu_value += change; | |
670 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
671 | qd->qd_qb.qb_value = qp->qu_value; | |
672 | if (fdq) { | |
673 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 674 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
675 | qd->qd_qb.qb_warn = qp->qu_warn; |
676 | } | |
677 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 678 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
679 | qd->qd_qb.qb_limit = qp->qu_limit; |
680 | } | |
802ec9b6 AD |
681 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
682 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
683 | qd->qd_qb.qb_value = qp->qu_value; | |
684 | } | |
7e619bc3 AD |
685 | } |
686 | ||
687 | /* Write the quota into the quota file on disk */ | |
688 | ptr = qp; | |
689 | nbytes = sizeof(struct gfs2_quota); | |
690 | get_a_page: | |
220cca2a | 691 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
692 | if (!page) |
693 | return -ENOMEM; | |
694 | ||
695 | blocksize = inode->i_sb->s_blocksize; | |
696 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
697 | ||
698 | if (!page_has_buffers(page)) | |
699 | create_empty_buffers(page, blocksize, 0); | |
700 | ||
701 | bh = page_buffers(page); | |
702 | pos = blocksize; | |
703 | while (offset >= pos) { | |
704 | bh = bh->b_this_page; | |
705 | iblock++; | |
706 | pos += blocksize; | |
707 | } | |
708 | ||
709 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 710 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 711 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
712 | goto unlock_out; |
713 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
714 | if (buffer_new(bh)) |
715 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
716 | } |
717 | ||
718 | if (PageUptodate(page)) | |
719 | set_buffer_uptodate(bh); | |
720 | ||
721 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 722 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
723 | wait_on_buffer(bh); |
724 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 725 | goto unlock_out; |
18ec7d5c SW |
726 | } |
727 | ||
37f71577 | 728 | gfs2_trans_add_data(ip->i_gl, bh); |
18ec7d5c | 729 | |
d9349285 | 730 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
731 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
732 | nbytes = PAGE_CACHE_SIZE - offset; | |
733 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 734 | flush_dcache_page(page); |
d9349285 | 735 | kunmap_atomic(kaddr); |
7e619bc3 AD |
736 | unlock_page(page); |
737 | page_cache_release(page); | |
738 | ||
739 | /* If quota straddles page boundary, we need to update the rest of the | |
740 | * quota at the beginning of the next page */ | |
8b421601 | 741 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
742 | ptr = ptr + nbytes; |
743 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
744 | offset = 0; | |
745 | index++; | |
746 | goto get_a_page; | |
747 | } | |
e285c100 | 748 | |
e285c100 | 749 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 750 | if (size > inode->i_size) |
e285c100 | 751 | i_size_write(inode, size); |
e285c100 | 752 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 753 | mark_inode_dirty(inode); |
500242ac | 754 | return 0; |
ab9bbda0 | 755 | |
7e619bc3 | 756 | unlock_out: |
18ec7d5c SW |
757 | unlock_page(page); |
758 | page_cache_release(page); | |
759 | return err; | |
760 | } | |
761 | ||
b3b94faa DT |
762 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
763 | { | |
764 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 765 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
766 | unsigned int data_blocks, ind_blocks; |
767 | struct gfs2_holder *ghs, i_gh; | |
768 | unsigned int qx, x; | |
769 | struct gfs2_quota_data *qd; | |
71f890f7 | 770 | unsigned reserved; |
f42faf4f | 771 | loff_t offset; |
20b95bf2 | 772 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
773 | int error; |
774 | ||
0a305e49 BP |
775 | error = gfs2_rs_alloc(ip); |
776 | if (error) | |
777 | return error; | |
778 | ||
b3b94faa DT |
779 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
780 | &data_blocks, &ind_blocks); | |
781 | ||
16c5f06f | 782 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
783 | if (!ghs) |
784 | return -ENOMEM; | |
785 | ||
786 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 787 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 788 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 789 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
790 | GL_NOCACHE, &ghs[qx]); |
791 | if (error) | |
792 | goto out; | |
793 | } | |
794 | ||
795 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
796 | if (error) | |
797 | goto out; | |
798 | ||
799 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 800 | offset = qd2offset(qda[x]); |
461cb419 BP |
801 | if (gfs2_write_alloc_required(ip, offset, |
802 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
803 | nalloc++; |
804 | } | |
805 | ||
20b95bf2 AD |
806 | /* |
807 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
808 | * block to the reservation unconditionally. If the inode | |
809 | * doesn't need unstuffing, the block will be released to the | |
810 | * rgrp since it won't be allocated during the transaction | |
811 | */ | |
7e619bc3 AD |
812 | /* +3 in the end for unstuffing block, inode size update block |
813 | * and another block in case quota straddles page boundary and | |
814 | * two blocks need to be updated instead of 1 */ | |
815 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 816 | |
71f890f7 | 817 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
9dbe9610 | 818 | error = gfs2_inplace_reserve(ip, reserved, 0); |
20b95bf2 AD |
819 | if (error) |
820 | goto out_alloc; | |
b3b94faa | 821 | |
20b95bf2 | 822 | if (nalloc) |
71f890f7 | 823 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
824 | |
825 | error = gfs2_trans_begin(sdp, blocks, 0); | |
826 | if (error) | |
827 | goto out_ipres; | |
b3b94faa DT |
828 | |
829 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
830 | qd = qda[x]; |
831 | offset = qd2offset(qd); | |
e285c100 | 832 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 833 | if (error) |
b3b94faa | 834 | goto out_end_trans; |
b3b94faa DT |
835 | |
836 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 837 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
838 | } |
839 | ||
840 | error = 0; | |
841 | ||
a91ea69f | 842 | out_end_trans: |
b3b94faa | 843 | gfs2_trans_end(sdp); |
a91ea69f | 844 | out_ipres: |
20b95bf2 | 845 | gfs2_inplace_release(ip); |
a91ea69f | 846 | out_alloc: |
b3b94faa | 847 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 848 | out: |
b3b94faa DT |
849 | while (qx--) |
850 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 851 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 852 | kfree(ghs); |
b09e593d | 853 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
854 | return error; |
855 | } | |
856 | ||
e285c100 SW |
857 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
858 | { | |
859 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
860 | struct gfs2_quota q; | |
861 | struct gfs2_quota_lvb *qlvb; | |
862 | loff_t pos; | |
863 | int error; | |
864 | ||
865 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
866 | pos = qd2offset(qd); | |
4306629e | 867 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
868 | if (error < 0) |
869 | return error; | |
870 | ||
4e2f8849 | 871 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
872 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
873 | qlvb->__pad = 0; | |
874 | qlvb->qb_limit = q.qu_limit; | |
875 | qlvb->qb_warn = q.qu_warn; | |
876 | qlvb->qb_value = q.qu_value; | |
877 | qd->qd_qb = *qlvb; | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
b3b94faa DT |
882 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
883 | struct gfs2_holder *q_gh) | |
884 | { | |
885 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 886 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 887 | struct gfs2_holder i_gh; |
b3b94faa DT |
888 | int error; |
889 | ||
a91ea69f | 890 | restart: |
b3b94faa DT |
891 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
892 | if (error) | |
893 | return error; | |
894 | ||
4e2f8849 | 895 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 896 | |
e9fc2aa0 | 897 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 898 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
899 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
900 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
901 | if (error) |
902 | return error; | |
903 | ||
e9fc2aa0 | 904 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
905 | if (error) |
906 | goto fail; | |
907 | ||
e285c100 SW |
908 | error = update_qd(sdp, qd); |
909 | if (error) | |
1e72c0f7 | 910 | goto fail_gunlock; |
b3b94faa | 911 | |
e285c100 | 912 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
913 | gfs2_glock_dq_uninit(q_gh); |
914 | force_refresh = 0; | |
915 | goto restart; | |
b3b94faa DT |
916 | } |
917 | ||
918 | return 0; | |
919 | ||
a91ea69f | 920 | fail_gunlock: |
b3b94faa | 921 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 922 | fail: |
b3b94faa | 923 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
924 | return error; |
925 | } | |
926 | ||
7c06b5d6 | 927 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 928 | { |
feaa7bba | 929 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 930 | struct gfs2_quota_data *qd; |
b3b94faa DT |
931 | unsigned int x; |
932 | int error = 0; | |
933 | ||
891a8e93 SW |
934 | error = gfs2_quota_hold(ip, uid, gid); |
935 | if (error) | |
936 | return error; | |
b3b94faa DT |
937 | |
938 | if (capable(CAP_SYS_RESOURCE) || | |
939 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
940 | return 0; | |
941 | ||
5407e242 BP |
942 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
943 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 944 | |
5407e242 | 945 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 946 | int force = NO_FORCE; |
5407e242 | 947 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
948 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
949 | force = FORCE; | |
5407e242 | 950 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
951 | if (error) |
952 | break; | |
953 | } | |
954 | ||
955 | if (!error) | |
956 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
957 | else { | |
958 | while (x--) | |
5407e242 | 959 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
960 | gfs2_quota_unhold(ip); |
961 | } | |
962 | ||
963 | return error; | |
964 | } | |
965 | ||
966 | static int need_sync(struct gfs2_quota_data *qd) | |
967 | { | |
968 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
969 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 970 | s64 value; |
b3b94faa DT |
971 | unsigned int num, den; |
972 | int do_sync = 1; | |
973 | ||
974 | if (!qd->qd_qb.qb_limit) | |
975 | return 0; | |
976 | ||
22077f57 | 977 | spin_lock(&qd_lru_lock); |
b3b94faa | 978 | value = qd->qd_change; |
22077f57 | 979 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
980 | |
981 | spin_lock(>->gt_spin); | |
982 | num = gt->gt_quota_scale_num; | |
983 | den = gt->gt_quota_scale_den; | |
984 | spin_unlock(>->gt_spin); | |
985 | ||
986 | if (value < 0) | |
987 | do_sync = 0; | |
e9fc2aa0 SW |
988 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
989 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
990 | do_sync = 0; |
991 | else { | |
992 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 993 | value = div_s64(value, den); |
e9fc2aa0 | 994 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 995 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
996 | do_sync = 0; |
997 | } | |
998 | ||
999 | return do_sync; | |
1000 | } | |
1001 | ||
1002 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1003 | { | |
b3b94faa DT |
1004 | struct gfs2_quota_data *qda[4]; |
1005 | unsigned int count = 0; | |
1006 | unsigned int x; | |
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]); |
b3b94faa DT |
1019 | |
1020 | if (sync && qd_trylock(qd)) | |
1021 | qda[count++] = qd; | |
1022 | } | |
1023 | ||
1024 | if (count) { | |
1025 | do_sync(count, qda); | |
1026 | for (x = 0; x < count; x++) | |
1027 | qd_unlock(qda[x]); | |
1028 | } | |
1029 | ||
a91ea69f | 1030 | out: |
b3b94faa DT |
1031 | gfs2_quota_unhold(ip); |
1032 | } | |
1033 | ||
1034 | #define MAX_LINE 256 | |
1035 | ||
1036 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1037 | { | |
1038 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1039 | |
2ec46505 | 1040 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 | 1041 | sdp->sd_fsname, type, |
05e0a60d EB |
1042 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1043 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1044 | |
1045 | return 0; | |
1046 | } | |
1047 | ||
7c06b5d6 | 1048 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
b3b94faa | 1049 | { |
feaa7bba | 1050 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1051 | struct gfs2_quota_data *qd; |
cd915493 | 1052 | s64 value; |
b3b94faa DT |
1053 | unsigned int x; |
1054 | int error = 0; | |
1055 | ||
1056 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1057 | return 0; | |
1058 | ||
1059 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1060 | return 0; | |
1061 | ||
5407e242 BP |
1062 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1063 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1064 | |
05e0a60d EB |
1065 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1066 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1067 | continue; |
1068 | ||
e9fc2aa0 | 1069 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1070 | spin_lock(&qd_lru_lock); |
b3b94faa | 1071 | value += qd->qd_change; |
22077f57 | 1072 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1073 | |
cd915493 | 1074 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1075 | print_message(qd, "exceeded"); |
05e0a60d | 1076 | quota_send_warning(qd->qd_id, |
2ec46505 SW |
1077 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1078 | ||
b3b94faa DT |
1079 | error = -EDQUOT; |
1080 | break; | |
e9fc2aa0 | 1081 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1082 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1083 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1084 | gfs2_tune_get(sdp, |
1085 | gt_quota_warn_period) * HZ)) { | |
05e0a60d | 1086 | quota_send_warning(qd->qd_id, |
2ec46505 | 1087 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1088 | error = print_message(qd, "warning"); |
1089 | qd->qd_last_warn = jiffies; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | return error; | |
1094 | } | |
1095 | ||
cd915493 | 1096 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
7c06b5d6 | 1097 | kuid_t uid, kgid_t gid) |
b3b94faa | 1098 | { |
b3b94faa DT |
1099 | struct gfs2_quota_data *qd; |
1100 | unsigned int x; | |
b3b94faa | 1101 | |
feaa7bba | 1102 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1103 | return; |
383f01fb | 1104 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1105 | return; |
1106 | ||
5407e242 BP |
1107 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1108 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1109 | |
05e0a60d EB |
1110 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1111 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1112 | do_qc(qd, change); |
b3b94faa DT |
1113 | } |
1114 | } | |
1115 | } | |
1116 | ||
ceed1723 | 1117 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1118 | { |
8c42d637 | 1119 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
1120 | struct gfs2_quota_data **qda; |
1121 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1122 | unsigned int num_qd; | |
1123 | unsigned int x; | |
1124 | int error = 0; | |
1125 | ||
1126 | sdp->sd_quota_sync_gen++; | |
1127 | ||
1128 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1129 | if (!qda) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | do { | |
1133 | num_qd = 0; | |
1134 | ||
1135 | for (;;) { | |
1136 | error = qd_fish(sdp, qda + num_qd); | |
1137 | if (error || !qda[num_qd]) | |
1138 | break; | |
1139 | if (++num_qd == max_qd) | |
1140 | break; | |
1141 | } | |
1142 | ||
1143 | if (num_qd) { | |
1144 | if (!error) | |
1145 | error = do_sync(num_qd, qda); | |
1146 | if (!error) | |
1147 | for (x = 0; x < num_qd; x++) | |
1148 | qda[x]->qd_sync_gen = | |
1149 | sdp->sd_quota_sync_gen; | |
1150 | ||
1151 | for (x = 0; x < num_qd; x++) | |
1152 | qd_unlock(qda[x]); | |
1153 | } | |
1154 | } while (!error && num_qd == max_qd); | |
1155 | ||
1156 | kfree(qda); | |
1157 | ||
1158 | return error; | |
1159 | } | |
1160 | ||
ed87dabc | 1161 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1162 | { |
1163 | struct gfs2_quota_data *qd; | |
1164 | struct gfs2_holder q_gh; | |
1165 | int error; | |
1166 | ||
05e0a60d | 1167 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1168 | if (error) |
1169 | return error; | |
1170 | ||
1171 | error = do_glock(qd, FORCE, &q_gh); | |
1172 | if (!error) | |
1173 | gfs2_glock_dq_uninit(&q_gh); | |
1174 | ||
1175 | qd_put(qd); | |
b3b94faa DT |
1176 | return error; |
1177 | } | |
1178 | ||
bb8d8a6f SW |
1179 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1180 | { | |
1181 | const struct gfs2_quota_change *str = buf; | |
1182 | ||
1183 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1184 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
e08d8d7f EB |
1185 | qc->qc_id = make_kqid(&init_user_ns, |
1186 | (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA, | |
1187 | be32_to_cpu(str->qc_id)); | |
bb8d8a6f SW |
1188 | } |
1189 | ||
b3b94faa DT |
1190 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1191 | { | |
feaa7bba | 1192 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1193 | u64 size = i_size_read(sdp->sd_qc_inode); |
1194 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1195 | unsigned int x, slot = 0; |
1196 | unsigned int found = 0; | |
cd915493 SW |
1197 | u64 dblock; |
1198 | u32 extlen = 0; | |
b3b94faa DT |
1199 | int error; |
1200 | ||
a2e0f799 | 1201 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1202 | return -EIO; |
a2e0f799 | 1203 | |
b3b94faa | 1204 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
5c676f6d | 1205 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1206 | |
1207 | error = -ENOMEM; | |
1208 | ||
1209 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1210 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1211 | if (!sdp->sd_quota_bitmap) |
1212 | return error; | |
1213 | ||
1214 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1215 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1216 | if (!sdp->sd_quota_bitmap[x]) |
1217 | goto fail; | |
1218 | } | |
1219 | ||
1220 | for (x = 0; x < blocks; x++) { | |
1221 | struct buffer_head *bh; | |
1222 | unsigned int y; | |
1223 | ||
1224 | if (!extlen) { | |
1225 | int new = 0; | |
feaa7bba | 1226 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1227 | if (error) |
1228 | goto fail; | |
1229 | } | |
b3b94faa | 1230 | error = -EIO; |
7276b3b0 SW |
1231 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1232 | if (!bh) | |
1233 | goto fail; | |
b3b94faa DT |
1234 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1235 | brelse(bh); | |
1236 | goto fail; | |
1237 | } | |
1238 | ||
7276b3b0 | 1239 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1240 | y++, slot++) { |
b62f963e | 1241 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1242 | struct gfs2_quota_data *qd; |
1243 | ||
1244 | gfs2_quota_change_in(&qc, bh->b_data + | |
1245 | sizeof(struct gfs2_meta_header) + | |
1246 | y * sizeof(struct gfs2_quota_change)); | |
1247 | if (!qc.qc_change) | |
1248 | continue; | |
1249 | ||
05e0a60d | 1250 | error = qd_alloc(sdp, qc.qc_id, &qd); |
b3b94faa DT |
1251 | if (error) { |
1252 | brelse(bh); | |
1253 | goto fail; | |
1254 | } | |
1255 | ||
1256 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1257 | qd->qd_change = qc.qc_change; | |
1258 | qd->qd_slot = slot; | |
1259 | qd->qd_slot_count = 1; | |
b3b94faa | 1260 | |
0a7ab79c | 1261 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1262 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1263 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1264 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1265 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1266 | |
1267 | found++; | |
1268 | } | |
1269 | ||
1270 | brelse(bh); | |
1271 | dblock++; | |
1272 | extlen--; | |
1273 | } | |
1274 | ||
1275 | if (found) | |
1276 | fs_info(sdp, "found %u quota changes\n", found); | |
1277 | ||
1278 | return 0; | |
1279 | ||
a91ea69f | 1280 | fail: |
b3b94faa DT |
1281 | gfs2_quota_cleanup(sdp); |
1282 | return error; | |
1283 | } | |
1284 | ||
b3b94faa DT |
1285 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1286 | { | |
1287 | struct list_head *head = &sdp->sd_quota_list; | |
1288 | struct gfs2_quota_data *qd; | |
1289 | unsigned int x; | |
1290 | ||
0a7ab79c | 1291 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1292 | while (!list_empty(head)) { |
1293 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1294 | ||
0a7ab79c AD |
1295 | if (atomic_read(&qd->qd_count) > 1 || |
1296 | (atomic_read(&qd->qd_count) && | |
1297 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1298 | list_move(&qd->qd_list, head); |
1299 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1300 | schedule(); |
0a7ab79c | 1301 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1302 | continue; |
1303 | } | |
1304 | ||
1305 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1306 | /* Also remove if this qd exists in the reclaim list */ |
1307 | if (!list_empty(&qd->qd_reclaim)) { | |
1308 | list_del_init(&qd->qd_reclaim); | |
1309 | atomic_dec(&qd_lru_count); | |
1310 | } | |
b3b94faa | 1311 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1312 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1313 | |
0a7ab79c | 1314 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1315 | gfs2_assert_warn(sdp, !qd->qd_change); |
1316 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1317 | } else | |
1318 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1319 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1320 | ||
f057f6cd | 1321 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1322 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1323 | |
0a7ab79c | 1324 | spin_lock(&qd_lru_lock); |
b3b94faa | 1325 | } |
0a7ab79c | 1326 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1327 | |
1328 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1329 | ||
1330 | if (sdp->sd_quota_bitmap) { | |
1331 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1332 | kfree(sdp->sd_quota_bitmap[x]); | |
1333 | kfree(sdp->sd_quota_bitmap); | |
1334 | } | |
1335 | } | |
1336 | ||
37b2c837 SW |
1337 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1338 | { | |
1339 | if (error == 0 || error == -EROFS) | |
1340 | return; | |
1341 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1342 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1343 | } | |
1344 | ||
1345 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1346 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1347 | unsigned long t, unsigned long *timeo, |
1348 | unsigned int *new_timeo) | |
1349 | { | |
1350 | if (t >= *timeo) { | |
8c42d637 | 1351 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1352 | quotad_error(sdp, msg, error); |
1353 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1354 | } else { | |
1355 | *timeo -= t; | |
1356 | } | |
1357 | } | |
1358 | ||
813e0c46 SW |
1359 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1360 | { | |
1361 | struct gfs2_inode *ip; | |
1362 | ||
1363 | while(1) { | |
1364 | ip = NULL; | |
1365 | spin_lock(&sdp->sd_trunc_lock); | |
1366 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1367 | ip = list_entry(sdp->sd_trunc_list.next, | |
1368 | struct gfs2_inode, i_trunc_list); | |
1369 | list_del_init(&ip->i_trunc_list); | |
1370 | } | |
1371 | spin_unlock(&sdp->sd_trunc_lock); | |
1372 | if (ip == NULL) | |
1373 | return; | |
1374 | gfs2_glock_finish_truncate(ip); | |
1375 | } | |
1376 | } | |
1377 | ||
3d3c10f2 BM |
1378 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1379 | if (!sdp->sd_statfs_force_sync) { | |
1380 | sdp->sd_statfs_force_sync = 1; | |
1381 | wake_up(&sdp->sd_quota_wait); | |
1382 | } | |
1383 | } | |
1384 | ||
1385 | ||
37b2c837 SW |
1386 | /** |
1387 | * gfs2_quotad - Write cached quota changes into the quota file | |
1388 | * @sdp: Pointer to GFS2 superblock | |
1389 | * | |
1390 | */ | |
1391 | ||
1392 | int gfs2_quotad(void *data) | |
1393 | { | |
1394 | struct gfs2_sbd *sdp = data; | |
1395 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1396 | unsigned long statfs_timeo = 0; | |
1397 | unsigned long quotad_timeo = 0; | |
1398 | unsigned long t = 0; | |
1399 | DEFINE_WAIT(wait); | |
813e0c46 | 1400 | int empty; |
37b2c837 SW |
1401 | |
1402 | while (!kthread_should_stop()) { | |
1403 | ||
1404 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1405 | if (sdp->sd_statfs_force_sync) { |
1406 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1407 | quotad_error(sdp, "statfs", error); | |
1408 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1409 | } | |
1410 | else | |
1411 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1412 | &statfs_timeo, | |
1413 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1414 | |
1415 | /* Update quota file */ | |
edd2e9ac | 1416 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, |
37b2c837 SW |
1417 | "ad_timeo, &tune->gt_quota_quantum); |
1418 | ||
813e0c46 SW |
1419 | /* Check for & recover partially truncated inodes */ |
1420 | quotad_check_trunc_list(sdp); | |
1421 | ||
a0acae0e TH |
1422 | try_to_freeze(); |
1423 | ||
37b2c837 SW |
1424 | t = min(quotad_timeo, statfs_timeo); |
1425 | ||
7fa5d20d | 1426 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1427 | spin_lock(&sdp->sd_trunc_lock); |
1428 | empty = list_empty(&sdp->sd_trunc_list); | |
1429 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1430 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1431 | t -= schedule_timeout(t); |
1432 | else | |
1433 | t = 0; | |
37b2c837 SW |
1434 | finish_wait(&sdp->sd_quota_wait, &wait); |
1435 | } | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
1d371b5e SW |
1440 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1441 | struct fs_quota_stat *fqs) | |
1442 | { | |
1443 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1444 | ||
1445 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1446 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1447 | |
1448 | switch (sdp->sd_args.ar_quota) { | |
1449 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1450 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1451 | /*FALLTHRU*/ |
1452 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1453 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1454 | break; |
1455 | case GFS2_QUOTA_OFF: | |
1456 | break; | |
1457 | } | |
1458 | ||
1d371b5e SW |
1459 | if (sdp->sd_quota_inode) { |
1460 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1461 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1462 | } | |
1463 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1464 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1465 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1466 | return 0; | |
1467 | } | |
1468 | ||
74a8a103 | 1469 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1470 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1471 | { |
1472 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1473 | struct gfs2_quota_lvb *qlvb; | |
1474 | struct gfs2_quota_data *qd; | |
1475 | struct gfs2_holder q_gh; | |
1476 | int error; | |
1477 | ||
1478 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1479 | ||
1480 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1481 | return -ESRCH; /* Crazy XFS error code */ | |
1482 | ||
236c64e4 EB |
1483 | if ((qid.type != USRQUOTA) && |
1484 | (qid.type != GRPQUOTA)) | |
113d6b3c SW |
1485 | return -EINVAL; |
1486 | ||
05e0a60d | 1487 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1488 | if (error) |
1489 | return error; | |
1490 | error = do_glock(qd, FORCE, &q_gh); | |
1491 | if (error) | |
1492 | goto out; | |
1493 | ||
4e2f8849 | 1494 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1495 | fdq->d_version = FS_DQUOT_VERSION; |
236c64e4 | 1496 | fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1497 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1498 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1499 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1500 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1501 | |
1502 | gfs2_glock_dq_uninit(&q_gh); | |
1503 | out: | |
1504 | qd_put(qd); | |
1505 | return error; | |
1506 | } | |
1507 | ||
e285c100 | 1508 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1509 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1510 | |
74a8a103 | 1511 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1512 | struct fs_disk_quota *fdq) |
e285c100 SW |
1513 | { |
1514 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1515 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1516 | struct gfs2_quota_data *qd; | |
1517 | struct gfs2_holder q_gh, i_gh; | |
1518 | unsigned int data_blocks, ind_blocks; | |
1519 | unsigned int blocks = 0; | |
1520 | int alloc_required; | |
e285c100 SW |
1521 | loff_t offset; |
1522 | int error; | |
1523 | ||
1524 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1525 | return -ESRCH; /* Crazy XFS error code */ | |
1526 | ||
236c64e4 EB |
1527 | if ((qid.type != USRQUOTA) && |
1528 | (qid.type != GRPQUOTA)) | |
e285c100 | 1529 | return -EINVAL; |
e285c100 SW |
1530 | |
1531 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1532 | return -EINVAL; | |
e285c100 | 1533 | |
05e0a60d | 1534 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1535 | if (error) |
1536 | return error; | |
1537 | ||
0a305e49 BP |
1538 | error = gfs2_rs_alloc(ip); |
1539 | if (error) | |
1540 | goto out_put; | |
1541 | ||
e285c100 SW |
1542 | mutex_lock(&ip->i_inode.i_mutex); |
1543 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1544 | if (error) | |
0a305e49 | 1545 | goto out_unlockput; |
e285c100 SW |
1546 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1547 | if (error) | |
1548 | goto out_q; | |
1549 | ||
1550 | /* Check for existing entry, if none then alloc new blocks */ | |
1551 | error = update_qd(sdp, qd); | |
1552 | if (error) | |
1553 | goto out_i; | |
1554 | ||
1555 | /* If nothing has changed, this is a no-op */ | |
1556 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1557 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1558 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1559 | |
e285c100 | 1560 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1561 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1562 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1563 | |
1564 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1565 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1566 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1567 | ||
e285c100 SW |
1568 | if (fdq->d_fieldmask == 0) |
1569 | goto out_i; | |
1570 | ||
1571 | offset = qd2offset(qd); | |
461cb419 | 1572 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1573 | if (gfs2_is_stuffed(ip)) |
1574 | alloc_required = 1; | |
e285c100 | 1575 | if (alloc_required) { |
e285c100 SW |
1576 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1577 | &data_blocks, &ind_blocks); | |
564e12b1 | 1578 | blocks = 1 + data_blocks + ind_blocks; |
9dbe9610 | 1579 | error = gfs2_inplace_reserve(ip, blocks, 0); |
e285c100 | 1580 | if (error) |
564e12b1 | 1581 | goto out_i; |
71f890f7 | 1582 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1583 | } |
1584 | ||
e79a46a0 AD |
1585 | /* Some quotas span block boundaries and can update two blocks, |
1586 | adding an extra block to the transaction to handle such quotas */ | |
1587 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1588 | if (error) |
1589 | goto out_release; | |
1590 | ||
1591 | /* Apply changes */ | |
1592 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1593 | ||
1594 | gfs2_trans_end(sdp); | |
1595 | out_release: | |
564e12b1 | 1596 | if (alloc_required) |
e285c100 | 1597 | gfs2_inplace_release(ip); |
e285c100 SW |
1598 | out_i: |
1599 | gfs2_glock_dq_uninit(&i_gh); | |
1600 | out_q: | |
1601 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1602 | out_unlockput: |
e285c100 | 1603 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1604 | out_put: |
e285c100 SW |
1605 | qd_put(qd); |
1606 | return error; | |
1607 | } | |
1608 | ||
cc632e7f SW |
1609 | const struct quotactl_ops gfs2_quotactl_ops = { |
1610 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1611 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1612 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1613 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1614 | }; |