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 DT |
67 | |
68 | #define QUOTA_USER 1 | |
69 | #define QUOTA_GROUP 0 | |
70 | ||
bb8d8a6f SW |
71 | struct gfs2_quota_change_host { |
72 | u64 qc_change; | |
73 | u32 qc_flags; /* GFS2_QCF_... */ | |
e08d8d7f | 74 | struct kqid qc_id; |
bb8d8a6f SW |
75 | }; |
76 | ||
0a7ab79c AD |
77 | static LIST_HEAD(qd_lru_list); |
78 | static atomic_t qd_lru_count = ATOMIC_INIT(0); | |
1328df72 | 79 | static DEFINE_SPINLOCK(qd_lru_lock); |
0a7ab79c | 80 | |
1495f230 | 81 | int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc) |
0a7ab79c AD |
82 | { |
83 | struct gfs2_quota_data *qd; | |
84 | struct gfs2_sbd *sdp; | |
1495f230 | 85 | int nr_to_scan = sc->nr_to_scan; |
0a7ab79c | 86 | |
1495f230 | 87 | if (nr_to_scan == 0) |
0a7ab79c AD |
88 | goto out; |
89 | ||
1495f230 | 90 | if (!(sc->gfp_mask & __GFP_FS)) |
0a7ab79c AD |
91 | return -1; |
92 | ||
93 | spin_lock(&qd_lru_lock); | |
1495f230 | 94 | while (nr_to_scan && !list_empty(&qd_lru_list)) { |
0a7ab79c AD |
95 | qd = list_entry(qd_lru_list.next, |
96 | struct gfs2_quota_data, qd_reclaim); | |
97 | sdp = qd->qd_gl->gl_sbd; | |
98 | ||
99 | /* Free from the filesystem-specific list */ | |
100 | list_del(&qd->qd_list); | |
101 | ||
0a7ab79c AD |
102 | gfs2_assert_warn(sdp, !qd->qd_change); |
103 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
104 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
105 | ||
f057f6cd | 106 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
107 | atomic_dec(&sdp->sd_quota_count); |
108 | ||
109 | /* Delete it from the common reclaim list */ | |
110 | list_del_init(&qd->qd_reclaim); | |
111 | atomic_dec(&qd_lru_count); | |
112 | spin_unlock(&qd_lru_lock); | |
113 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
114 | spin_lock(&qd_lru_lock); | |
1495f230 | 115 | nr_to_scan--; |
0a7ab79c AD |
116 | } |
117 | spin_unlock(&qd_lru_lock); | |
118 | ||
119 | out: | |
120 | return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100; | |
121 | } | |
122 | ||
2f6c9896 EB |
123 | static u64 qd2index(struct gfs2_quota_data *qd) |
124 | { | |
125 | return (2 * (u64)qd->qd_id) + | |
126 | test_bit(QDF_USER, &qd->qd_flags) ? 0 : 1; | |
127 | } | |
128 | ||
cd915493 | 129 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 130 | { |
cd915493 | 131 | u64 offset; |
b3b94faa | 132 | |
2f6c9896 | 133 | offset = qd2index(qd); |
b3b94faa DT |
134 | offset *= sizeof(struct gfs2_quota); |
135 | ||
136 | return offset; | |
137 | } | |
138 | ||
cd915493 | 139 | static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
140 | struct gfs2_quota_data **qdp) |
141 | { | |
142 | struct gfs2_quota_data *qd; | |
143 | int error; | |
144 | ||
37b2c837 | 145 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
146 | if (!qd) |
147 | return -ENOMEM; | |
148 | ||
0a7ab79c | 149 | atomic_set(&qd->qd_count, 1); |
b3b94faa DT |
150 | qd->qd_id = id; |
151 | if (user) | |
152 | set_bit(QDF_USER, &qd->qd_flags); | |
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 | ||
6a6ada81 | 170 | static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, |
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 DT |
181 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
182 | if (qd->qd_id == id && | |
183 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { | |
0a7ab79c AD |
184 | if (!atomic_read(&qd->qd_count) && |
185 | !list_empty(&qd->qd_reclaim)) { | |
186 | /* Remove it from reclaim list */ | |
187 | list_del_init(&qd->qd_reclaim); | |
188 | atomic_dec(&qd_lru_count); | |
189 | } | |
190 | atomic_inc(&qd->qd_count); | |
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 | ||
217 | error = qd_alloc(sdp, user, id, &new_qd); | |
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; | |
0a7ab79c AD |
226 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
227 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
228 | } |
229 | ||
230 | static void qd_put(struct gfs2_quota_data *qd) | |
231 | { | |
0a7ab79c AD |
232 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
233 | /* Add to the reclaim list */ | |
234 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
235 | atomic_inc(&qd_lru_count); | |
236 | spin_unlock(&qd_lru_lock); | |
237 | } | |
b3b94faa DT |
238 | } |
239 | ||
240 | static int slot_get(struct gfs2_quota_data *qd) | |
241 | { | |
242 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
243 | unsigned int c, o = 0, b; | |
244 | unsigned char byte = 0; | |
245 | ||
22077f57 | 246 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
247 | |
248 | if (qd->qd_slot_count++) { | |
22077f57 | 249 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
250 | return 0; |
251 | } | |
252 | ||
253 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
254 | for (o = 0; o < PAGE_SIZE; o++) { | |
255 | byte = sdp->sd_quota_bitmap[c][o]; | |
256 | if (byte != 0xFF) | |
257 | goto found; | |
258 | } | |
259 | ||
260 | goto fail; | |
261 | ||
a91ea69f | 262 | found: |
b3b94faa DT |
263 | for (b = 0; b < 8; b++) |
264 | if (!(byte & (1 << b))) | |
265 | break; | |
266 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
267 | ||
268 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
269 | goto fail; | |
270 | ||
271 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
272 | ||
22077f57 | 273 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
274 | |
275 | return 0; | |
276 | ||
a91ea69f | 277 | fail: |
b3b94faa | 278 | qd->qd_slot_count--; |
22077f57 | 279 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
280 | return -ENOSPC; |
281 | } | |
282 | ||
283 | static void slot_hold(struct gfs2_quota_data *qd) | |
284 | { | |
285 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
286 | ||
22077f57 | 287 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
288 | gfs2_assert(sdp, qd->qd_slot_count); |
289 | qd->qd_slot_count++; | |
22077f57 | 290 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
291 | } |
292 | ||
293 | static void slot_put(struct gfs2_quota_data *qd) | |
294 | { | |
295 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
296 | ||
22077f57 | 297 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
298 | gfs2_assert(sdp, qd->qd_slot_count); |
299 | if (!--qd->qd_slot_count) { | |
300 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
301 | qd->qd_slot = -1; | |
302 | } | |
22077f57 | 303 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
304 | } |
305 | ||
306 | static int bh_get(struct gfs2_quota_data *qd) | |
307 | { | |
308 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 309 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 310 | unsigned int block, offset; |
b3b94faa DT |
311 | struct buffer_head *bh; |
312 | int error; | |
23591256 | 313 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 314 | |
f55ab26a | 315 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
316 | |
317 | if (qd->qd_bh_count++) { | |
f55ab26a | 318 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
319 | return 0; |
320 | } | |
321 | ||
322 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 323 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 324 | |
23591256 | 325 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 326 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
327 | if (error) |
328 | goto fail; | |
7276b3b0 | 329 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
330 | if (error) |
331 | goto fail; | |
332 | error = -EIO; | |
333 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
334 | goto fail_brelse; | |
335 | ||
336 | qd->qd_bh = bh; | |
337 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
338 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
339 | offset * sizeof(struct gfs2_quota_change)); | |
340 | ||
2e95b665 | 341 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
342 | |
343 | return 0; | |
344 | ||
a91ea69f | 345 | fail_brelse: |
b3b94faa | 346 | brelse(bh); |
a91ea69f | 347 | fail: |
b3b94faa | 348 | qd->qd_bh_count--; |
f55ab26a | 349 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
350 | return error; |
351 | } | |
352 | ||
353 | static void bh_put(struct gfs2_quota_data *qd) | |
354 | { | |
355 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
356 | ||
f55ab26a | 357 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
358 | gfs2_assert(sdp, qd->qd_bh_count); |
359 | if (!--qd->qd_bh_count) { | |
360 | brelse(qd->qd_bh); | |
361 | qd->qd_bh = NULL; | |
362 | qd->qd_bh_qc = NULL; | |
363 | } | |
f55ab26a | 364 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
365 | } |
366 | ||
367 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
368 | { | |
369 | struct gfs2_quota_data *qd = NULL; | |
370 | int error; | |
371 | int found = 0; | |
372 | ||
373 | *qdp = NULL; | |
374 | ||
375 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
376 | return 0; | |
377 | ||
0a7ab79c | 378 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
379 | |
380 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
381 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
382 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
383 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
384 | continue; | |
385 | ||
386 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
387 | ||
388 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
389 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
390 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
391 | qd->qd_change_sync = qd->qd_change; |
392 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
393 | qd->qd_slot_count++; | |
394 | found = 1; | |
395 | ||
396 | break; | |
397 | } | |
398 | ||
399 | if (!found) | |
400 | qd = NULL; | |
401 | ||
0a7ab79c | 402 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
403 | |
404 | if (qd) { | |
405 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
406 | error = bh_get(qd); | |
407 | if (error) { | |
408 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
409 | slot_put(qd); | |
410 | qd_put(qd); | |
411 | return error; | |
412 | } | |
413 | } | |
414 | ||
415 | *qdp = qd; | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | static int qd_trylock(struct gfs2_quota_data *qd) | |
421 | { | |
422 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
423 | ||
424 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
425 | return 0; | |
426 | ||
0a7ab79c | 427 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
428 | |
429 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
430 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 431 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
432 | return 0; |
433 | } | |
434 | ||
435 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
436 | ||
437 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
438 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
439 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
440 | qd->qd_change_sync = qd->qd_change; |
441 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
442 | qd->qd_slot_count++; | |
443 | ||
0a7ab79c | 444 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
445 | |
446 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
447 | if (bh_get(qd)) { | |
448 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
449 | slot_put(qd); | |
450 | qd_put(qd); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | return 1; | |
455 | } | |
456 | ||
457 | static void qd_unlock(struct gfs2_quota_data *qd) | |
458 | { | |
568f4c96 SW |
459 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
460 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
461 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
462 | bh_put(qd); | |
463 | slot_put(qd); | |
464 | qd_put(qd); | |
465 | } | |
466 | ||
33a82529 | 467 | static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
468 | struct gfs2_quota_data **qdp) |
469 | { | |
470 | int error; | |
471 | ||
6a6ada81 | 472 | error = qd_get(sdp, user, id, qdp); |
b3b94faa DT |
473 | if (error) |
474 | return error; | |
475 | ||
476 | error = slot_get(*qdp); | |
477 | if (error) | |
478 | goto fail; | |
479 | ||
480 | error = bh_get(*qdp); | |
481 | if (error) | |
482 | goto fail_slot; | |
483 | ||
484 | return 0; | |
485 | ||
a91ea69f | 486 | fail_slot: |
b3b94faa | 487 | slot_put(*qdp); |
a91ea69f | 488 | fail: |
b3b94faa DT |
489 | qd_put(*qdp); |
490 | return error; | |
491 | } | |
492 | ||
493 | static void qdsb_put(struct gfs2_quota_data *qd) | |
494 | { | |
495 | bh_put(qd); | |
496 | slot_put(qd); | |
497 | qd_put(qd); | |
498 | } | |
499 | ||
cd915493 | 500 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 501 | { |
feaa7bba | 502 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 503 | struct gfs2_quota_data **qd; |
b3b94faa DT |
504 | int error; |
505 | ||
aaaf68c5 AP |
506 | if (ip->i_res == NULL) { |
507 | error = gfs2_rs_alloc(ip); | |
508 | if (error) | |
509 | return error; | |
510 | } | |
5407e242 BP |
511 | |
512 | qd = ip->i_res->rs_qa_qd; | |
513 | ||
514 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
515 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
516 | return -EIO; | |
517 | ||
518 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
519 | return 0; | |
520 | ||
33a82529 | 521 | error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd); |
b3b94faa DT |
522 | if (error) |
523 | goto out; | |
5407e242 | 524 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
525 | qd++; |
526 | ||
33a82529 | 527 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd); |
b3b94faa DT |
528 | if (error) |
529 | goto out; | |
5407e242 | 530 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
531 | qd++; |
532 | ||
f4108a60 | 533 | if (uid != NO_UID_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
33a82529 | 534 | error = qdsb_get(sdp, QUOTA_USER, 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 | ||
f4108a60 | 541 | if (gid != NO_GID_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
33a82529 | 542 | error = qdsb_get(sdp, QUOTA_GROUP, gid, qd); |
b3b94faa DT |
543 | if (error) |
544 | goto out; | |
5407e242 | 545 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
546 | qd++; |
547 | } | |
548 | ||
a91ea69f | 549 | out: |
b3b94faa DT |
550 | if (error) |
551 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
552 | return error; |
553 | } | |
554 | ||
555 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
556 | { | |
feaa7bba | 557 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
558 | unsigned int x; |
559 | ||
5407e242 BP |
560 | if (ip->i_res == NULL) |
561 | return; | |
b3b94faa DT |
562 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
563 | ||
5407e242 BP |
564 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
565 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
566 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 567 | } |
5407e242 | 568 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
569 | } |
570 | ||
571 | static int sort_qd(const void *a, const void *b) | |
572 | { | |
48fac179 SW |
573 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
574 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa DT |
575 | |
576 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != | |
577 | !test_bit(QDF_USER, &qd_b->qd_flags)) { | |
578 | if (test_bit(QDF_USER, &qd_a->qd_flags)) | |
48fac179 | 579 | return -1; |
b3b94faa | 580 | else |
48fac179 | 581 | return 1; |
b3b94faa | 582 | } |
48fac179 SW |
583 | if (qd_a->qd_id < qd_b->qd_id) |
584 | return -1; | |
585 | if (qd_a->qd_id > qd_b->qd_id) | |
586 | return 1; | |
b3b94faa | 587 | |
48fac179 | 588 | return 0; |
b3b94faa DT |
589 | } |
590 | ||
cd915493 | 591 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
592 | { |
593 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 594 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 595 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 596 | s64 x; |
b3b94faa | 597 | |
f55ab26a | 598 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 599 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
600 | |
601 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
602 | qc->qc_change = 0; | |
603 | qc->qc_flags = 0; | |
604 | if (test_bit(QDF_USER, &qd->qd_flags)) | |
605 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); | |
606 | qc->qc_id = cpu_to_be32(qd->qd_id); | |
607 | } | |
608 | ||
b44b84d7 | 609 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
610 | qc->qc_change = cpu_to_be64(x); |
611 | ||
22077f57 | 612 | spin_lock(&qd_lru_lock); |
b3b94faa | 613 | qd->qd_change = x; |
22077f57 | 614 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
615 | |
616 | if (!x) { | |
617 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
618 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
619 | qc->qc_flags = 0; | |
620 | qc->qc_id = 0; | |
621 | slot_put(qd); | |
622 | qd_put(qd); | |
623 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
624 | qd_hold(qd); | |
625 | slot_hold(qd); | |
626 | } | |
907b9bce | 627 | |
f55ab26a | 628 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
629 | } |
630 | ||
18ec7d5c | 631 | /** |
1e72c0f7 SW |
632 | * gfs2_adjust_quota - adjust record of current block usage |
633 | * @ip: The quota inode | |
634 | * @loc: Offset of the entry in the quota file | |
e285c100 | 635 | * @change: The amount of usage change to record |
1e72c0f7 | 636 | * @qd: The quota data |
e285c100 | 637 | * @fdq: The updated limits to record |
18ec7d5c SW |
638 | * |
639 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
640 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
641 | * |
642 | * Returns: 0 or -ve on error | |
18ec7d5c | 643 | */ |
1e72c0f7 | 644 | |
18ec7d5c | 645 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
646 | s64 change, struct gfs2_quota_data *qd, |
647 | struct fs_disk_quota *fdq) | |
18ec7d5c | 648 | { |
feaa7bba | 649 | struct inode *inode = &ip->i_inode; |
14870b45 | 650 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
651 | struct address_space *mapping = inode->i_mapping; |
652 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 653 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 654 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 655 | struct buffer_head *bh; |
18ec7d5c | 656 | struct page *page; |
7e619bc3 AD |
657 | void *kaddr, *ptr; |
658 | struct gfs2_quota q, *qp; | |
659 | int err, nbytes; | |
e285c100 | 660 | u64 size; |
18ec7d5c | 661 | |
891a8e93 SW |
662 | if (gfs2_is_stuffed(ip)) { |
663 | err = gfs2_unstuff_dinode(ip, NULL); | |
664 | if (err) | |
665 | return err; | |
666 | } | |
7e619bc3 AD |
667 | |
668 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 669 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
670 | if (err < 0) |
671 | return err; | |
672 | ||
673 | err = -EIO; | |
674 | qp = &q; | |
675 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
676 | qp->qu_value += change; | |
677 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
678 | qd->qd_qb.qb_value = qp->qu_value; | |
679 | if (fdq) { | |
680 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 681 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
682 | qd->qd_qb.qb_warn = qp->qu_warn; |
683 | } | |
684 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 685 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
686 | qd->qd_qb.qb_limit = qp->qu_limit; |
687 | } | |
802ec9b6 AD |
688 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
689 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
690 | qd->qd_qb.qb_value = qp->qu_value; | |
691 | } | |
7e619bc3 AD |
692 | } |
693 | ||
694 | /* Write the quota into the quota file on disk */ | |
695 | ptr = qp; | |
696 | nbytes = sizeof(struct gfs2_quota); | |
697 | get_a_page: | |
220cca2a | 698 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
699 | if (!page) |
700 | return -ENOMEM; | |
701 | ||
702 | blocksize = inode->i_sb->s_blocksize; | |
703 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
704 | ||
705 | if (!page_has_buffers(page)) | |
706 | create_empty_buffers(page, blocksize, 0); | |
707 | ||
708 | bh = page_buffers(page); | |
709 | pos = blocksize; | |
710 | while (offset >= pos) { | |
711 | bh = bh->b_this_page; | |
712 | iblock++; | |
713 | pos += blocksize; | |
714 | } | |
715 | ||
716 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 717 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 718 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
719 | goto unlock_out; |
720 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
721 | if (buffer_new(bh)) |
722 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
723 | } |
724 | ||
725 | if (PageUptodate(page)) | |
726 | set_buffer_uptodate(bh); | |
727 | ||
728 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 729 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
730 | wait_on_buffer(bh); |
731 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 732 | goto unlock_out; |
18ec7d5c SW |
733 | } |
734 | ||
735 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
736 | ||
d9349285 | 737 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
738 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
739 | nbytes = PAGE_CACHE_SIZE - offset; | |
740 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 741 | flush_dcache_page(page); |
d9349285 | 742 | kunmap_atomic(kaddr); |
7e619bc3 AD |
743 | unlock_page(page); |
744 | page_cache_release(page); | |
745 | ||
746 | /* If quota straddles page boundary, we need to update the rest of the | |
747 | * quota at the beginning of the next page */ | |
8b421601 | 748 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
749 | ptr = ptr + nbytes; |
750 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
751 | offset = 0; | |
752 | index++; | |
753 | goto get_a_page; | |
754 | } | |
e285c100 | 755 | |
e285c100 | 756 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 757 | if (size > inode->i_size) |
e285c100 | 758 | i_size_write(inode, size); |
e285c100 | 759 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 760 | mark_inode_dirty(inode); |
500242ac | 761 | return 0; |
ab9bbda0 | 762 | |
7e619bc3 | 763 | unlock_out: |
18ec7d5c SW |
764 | unlock_page(page); |
765 | page_cache_release(page); | |
766 | return err; | |
767 | } | |
768 | ||
b3b94faa DT |
769 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
770 | { | |
771 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 772 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
773 | unsigned int data_blocks, ind_blocks; |
774 | struct gfs2_holder *ghs, i_gh; | |
775 | unsigned int qx, x; | |
776 | struct gfs2_quota_data *qd; | |
71f890f7 | 777 | unsigned reserved; |
f42faf4f | 778 | loff_t offset; |
20b95bf2 | 779 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
780 | int error; |
781 | ||
0a305e49 BP |
782 | error = gfs2_rs_alloc(ip); |
783 | if (error) | |
784 | return error; | |
785 | ||
b3b94faa DT |
786 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
787 | &data_blocks, &ind_blocks); | |
788 | ||
16c5f06f | 789 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
790 | if (!ghs) |
791 | return -ENOMEM; | |
792 | ||
793 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 794 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 795 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 796 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
797 | GL_NOCACHE, &ghs[qx]); |
798 | if (error) | |
799 | goto out; | |
800 | } | |
801 | ||
802 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
803 | if (error) | |
804 | goto out; | |
805 | ||
806 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 807 | offset = qd2offset(qda[x]); |
461cb419 BP |
808 | if (gfs2_write_alloc_required(ip, offset, |
809 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
810 | nalloc++; |
811 | } | |
812 | ||
20b95bf2 AD |
813 | /* |
814 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
815 | * block to the reservation unconditionally. If the inode | |
816 | * doesn't need unstuffing, the block will be released to the | |
817 | * rgrp since it won't be allocated during the transaction | |
818 | */ | |
7e619bc3 AD |
819 | /* +3 in the end for unstuffing block, inode size update block |
820 | * and another block in case quota straddles page boundary and | |
821 | * two blocks need to be updated instead of 1 */ | |
822 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 823 | |
71f890f7 | 824 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
9dbe9610 | 825 | error = gfs2_inplace_reserve(ip, reserved, 0); |
20b95bf2 AD |
826 | if (error) |
827 | goto out_alloc; | |
b3b94faa | 828 | |
20b95bf2 | 829 | if (nalloc) |
71f890f7 | 830 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
831 | |
832 | error = gfs2_trans_begin(sdp, blocks, 0); | |
833 | if (error) | |
834 | goto out_ipres; | |
b3b94faa DT |
835 | |
836 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
837 | qd = qda[x]; |
838 | offset = qd2offset(qd); | |
e285c100 | 839 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 840 | if (error) |
b3b94faa | 841 | goto out_end_trans; |
b3b94faa DT |
842 | |
843 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 844 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
845 | } |
846 | ||
847 | error = 0; | |
848 | ||
a91ea69f | 849 | out_end_trans: |
b3b94faa | 850 | gfs2_trans_end(sdp); |
a91ea69f | 851 | out_ipres: |
20b95bf2 | 852 | gfs2_inplace_release(ip); |
a91ea69f | 853 | out_alloc: |
b3b94faa | 854 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 855 | out: |
b3b94faa DT |
856 | while (qx--) |
857 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 858 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 859 | kfree(ghs); |
b09e593d | 860 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
861 | return error; |
862 | } | |
863 | ||
e285c100 SW |
864 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
865 | { | |
866 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
867 | struct gfs2_quota q; | |
868 | struct gfs2_quota_lvb *qlvb; | |
869 | loff_t pos; | |
870 | int error; | |
871 | ||
872 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
873 | pos = qd2offset(qd); | |
4306629e | 874 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
875 | if (error < 0) |
876 | return error; | |
877 | ||
4e2f8849 | 878 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
879 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
880 | qlvb->__pad = 0; | |
881 | qlvb->qb_limit = q.qu_limit; | |
882 | qlvb->qb_warn = q.qu_warn; | |
883 | qlvb->qb_value = q.qu_value; | |
884 | qd->qd_qb = *qlvb; | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
b3b94faa DT |
889 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
890 | struct gfs2_holder *q_gh) | |
891 | { | |
892 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 893 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 894 | struct gfs2_holder i_gh; |
b3b94faa DT |
895 | int error; |
896 | ||
a91ea69f | 897 | restart: |
b3b94faa DT |
898 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
899 | if (error) | |
900 | return error; | |
901 | ||
4e2f8849 | 902 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 903 | |
e9fc2aa0 | 904 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 905 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
906 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
907 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
908 | if (error) |
909 | return error; | |
910 | ||
e9fc2aa0 | 911 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
912 | if (error) |
913 | goto fail; | |
914 | ||
e285c100 SW |
915 | error = update_qd(sdp, qd); |
916 | if (error) | |
1e72c0f7 | 917 | goto fail_gunlock; |
b3b94faa | 918 | |
e285c100 | 919 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
920 | gfs2_glock_dq_uninit(q_gh); |
921 | force_refresh = 0; | |
922 | goto restart; | |
b3b94faa DT |
923 | } |
924 | ||
925 | return 0; | |
926 | ||
a91ea69f | 927 | fail_gunlock: |
b3b94faa | 928 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 929 | fail: |
b3b94faa | 930 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
931 | return error; |
932 | } | |
933 | ||
cd915493 | 934 | int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 935 | { |
feaa7bba | 936 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 937 | struct gfs2_quota_data *qd; |
b3b94faa DT |
938 | unsigned int x; |
939 | int error = 0; | |
940 | ||
891a8e93 SW |
941 | error = gfs2_quota_hold(ip, uid, gid); |
942 | if (error) | |
943 | return error; | |
b3b94faa DT |
944 | |
945 | if (capable(CAP_SYS_RESOURCE) || | |
946 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
947 | return 0; | |
948 | ||
5407e242 BP |
949 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
950 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 951 | |
5407e242 | 952 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 953 | int force = NO_FORCE; |
5407e242 | 954 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
955 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
956 | force = FORCE; | |
5407e242 | 957 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
958 | if (error) |
959 | break; | |
960 | } | |
961 | ||
962 | if (!error) | |
963 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
964 | else { | |
965 | while (x--) | |
5407e242 | 966 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
967 | gfs2_quota_unhold(ip); |
968 | } | |
969 | ||
970 | return error; | |
971 | } | |
972 | ||
973 | static int need_sync(struct gfs2_quota_data *qd) | |
974 | { | |
975 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
976 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 977 | s64 value; |
b3b94faa DT |
978 | unsigned int num, den; |
979 | int do_sync = 1; | |
980 | ||
981 | if (!qd->qd_qb.qb_limit) | |
982 | return 0; | |
983 | ||
22077f57 | 984 | spin_lock(&qd_lru_lock); |
b3b94faa | 985 | value = qd->qd_change; |
22077f57 | 986 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
987 | |
988 | spin_lock(>->gt_spin); | |
989 | num = gt->gt_quota_scale_num; | |
990 | den = gt->gt_quota_scale_den; | |
991 | spin_unlock(>->gt_spin); | |
992 | ||
993 | if (value < 0) | |
994 | do_sync = 0; | |
e9fc2aa0 SW |
995 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
996 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
997 | do_sync = 0; |
998 | else { | |
999 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 1000 | value = div_s64(value, den); |
e9fc2aa0 | 1001 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 1002 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
1003 | do_sync = 0; |
1004 | } | |
1005 | ||
1006 | return do_sync; | |
1007 | } | |
1008 | ||
1009 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1010 | { | |
b3b94faa DT |
1011 | struct gfs2_quota_data *qda[4]; |
1012 | unsigned int count = 0; | |
1013 | unsigned int x; | |
1014 | ||
1015 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1016 | goto out; | |
1017 | ||
5407e242 | 1018 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1019 | struct gfs2_quota_data *qd; |
1020 | int sync; | |
1021 | ||
5407e242 | 1022 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1023 | sync = need_sync(qd); |
1024 | ||
5407e242 | 1025 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
1026 | |
1027 | if (sync && qd_trylock(qd)) | |
1028 | qda[count++] = qd; | |
1029 | } | |
1030 | ||
1031 | if (count) { | |
1032 | do_sync(count, qda); | |
1033 | for (x = 0; x < count; x++) | |
1034 | qd_unlock(qda[x]); | |
1035 | } | |
1036 | ||
a91ea69f | 1037 | out: |
b3b94faa DT |
1038 | gfs2_quota_unhold(ip); |
1039 | } | |
1040 | ||
1041 | #define MAX_LINE 256 | |
1042 | ||
1043 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1044 | { | |
1045 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1046 | |
2ec46505 | 1047 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 SW |
1048 | sdp->sd_fsname, type, |
1049 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", | |
1050 | qd->qd_id); | |
b3b94faa DT |
1051 | |
1052 | return 0; | |
1053 | } | |
1054 | ||
cd915493 | 1055 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 1056 | { |
feaa7bba | 1057 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1058 | struct gfs2_quota_data *qd; |
cd915493 | 1059 | s64 value; |
b3b94faa DT |
1060 | unsigned int x; |
1061 | int error = 0; | |
1062 | ||
1063 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1064 | return 0; | |
1065 | ||
1066 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1067 | return 0; | |
1068 | ||
5407e242 BP |
1069 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1070 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa DT |
1071 | |
1072 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1073 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) | |
1074 | continue; | |
1075 | ||
e9fc2aa0 | 1076 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1077 | spin_lock(&qd_lru_lock); |
b3b94faa | 1078 | value += qd->qd_change; |
22077f57 | 1079 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1080 | |
cd915493 | 1081 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1082 | print_message(qd, "exceeded"); |
431f1974 EB |
1083 | quota_send_warning(make_kqid(&init_user_ns, |
1084 | test_bit(QDF_USER, &qd->qd_flags) ? | |
1085 | USRQUOTA : GRPQUOTA, | |
1086 | qd->qd_id), | |
2ec46505 SW |
1087 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1088 | ||
b3b94faa DT |
1089 | error = -EDQUOT; |
1090 | break; | |
e9fc2aa0 | 1091 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1092 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1093 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1094 | gfs2_tune_get(sdp, |
1095 | gt_quota_warn_period) * HZ)) { | |
431f1974 EB |
1096 | quota_send_warning(make_kqid(&init_user_ns, |
1097 | test_bit(QDF_USER, &qd->qd_flags) ? | |
1098 | USRQUOTA : GRPQUOTA, | |
1099 | qd->qd_id), | |
2ec46505 | 1100 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1101 | error = print_message(qd, "warning"); |
1102 | qd->qd_last_warn = jiffies; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | return error; | |
1107 | } | |
1108 | ||
cd915493 SW |
1109 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1110 | u32 uid, u32 gid) | |
b3b94faa | 1111 | { |
b3b94faa DT |
1112 | struct gfs2_quota_data *qd; |
1113 | unsigned int x; | |
b3b94faa | 1114 | |
feaa7bba | 1115 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1116 | return; |
383f01fb | 1117 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1118 | return; |
1119 | ||
5407e242 BP |
1120 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1121 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa DT |
1122 | |
1123 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1124 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { | |
1125 | do_qc(qd, change); | |
b3b94faa DT |
1126 | } |
1127 | } | |
1128 | } | |
1129 | ||
ceed1723 | 1130 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1131 | { |
8c42d637 | 1132 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
1133 | struct gfs2_quota_data **qda; |
1134 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1135 | unsigned int num_qd; | |
1136 | unsigned int x; | |
1137 | int error = 0; | |
1138 | ||
1139 | sdp->sd_quota_sync_gen++; | |
1140 | ||
1141 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1142 | if (!qda) | |
1143 | return -ENOMEM; | |
1144 | ||
1145 | do { | |
1146 | num_qd = 0; | |
1147 | ||
1148 | for (;;) { | |
1149 | error = qd_fish(sdp, qda + num_qd); | |
1150 | if (error || !qda[num_qd]) | |
1151 | break; | |
1152 | if (++num_qd == max_qd) | |
1153 | break; | |
1154 | } | |
1155 | ||
1156 | if (num_qd) { | |
1157 | if (!error) | |
1158 | error = do_sync(num_qd, qda); | |
1159 | if (!error) | |
1160 | for (x = 0; x < num_qd; x++) | |
1161 | qda[x]->qd_sync_gen = | |
1162 | sdp->sd_quota_sync_gen; | |
1163 | ||
1164 | for (x = 0; x < num_qd; x++) | |
1165 | qd_unlock(qda[x]); | |
1166 | } | |
1167 | } while (!error && num_qd == max_qd); | |
1168 | ||
1169 | kfree(qda); | |
1170 | ||
1171 | return error; | |
1172 | } | |
1173 | ||
5fb324ad CH |
1174 | static int gfs2_quota_sync_timeo(struct super_block *sb, int type) |
1175 | { | |
ceed1723 | 1176 | return gfs2_quota_sync(sb, type); |
5fb324ad CH |
1177 | } |
1178 | ||
cd915493 | 1179 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) |
b3b94faa DT |
1180 | { |
1181 | struct gfs2_quota_data *qd; | |
1182 | struct gfs2_holder q_gh; | |
1183 | int error; | |
1184 | ||
6a6ada81 | 1185 | error = qd_get(sdp, user, id, &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 | ||
1268 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), | |
e08d8d7f | 1269 | from_kqid(&init_user_ns, qc.qc_id), &qd); |
b3b94faa DT |
1270 | if (error) { |
1271 | brelse(bh); | |
1272 | goto fail; | |
1273 | } | |
1274 | ||
1275 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1276 | qd->qd_change = qc.qc_change; | |
1277 | qd->qd_slot = slot; | |
1278 | qd->qd_slot_count = 1; | |
b3b94faa | 1279 | |
0a7ab79c | 1280 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1281 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1282 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1283 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1284 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1285 | |
1286 | found++; | |
1287 | } | |
1288 | ||
1289 | brelse(bh); | |
1290 | dblock++; | |
1291 | extlen--; | |
1292 | } | |
1293 | ||
1294 | if (found) | |
1295 | fs_info(sdp, "found %u quota changes\n", found); | |
1296 | ||
1297 | return 0; | |
1298 | ||
a91ea69f | 1299 | fail: |
b3b94faa DT |
1300 | gfs2_quota_cleanup(sdp); |
1301 | return error; | |
1302 | } | |
1303 | ||
b3b94faa DT |
1304 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1305 | { | |
1306 | struct list_head *head = &sdp->sd_quota_list; | |
1307 | struct gfs2_quota_data *qd; | |
1308 | unsigned int x; | |
1309 | ||
0a7ab79c | 1310 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1311 | while (!list_empty(head)) { |
1312 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1313 | ||
0a7ab79c AD |
1314 | if (atomic_read(&qd->qd_count) > 1 || |
1315 | (atomic_read(&qd->qd_count) && | |
1316 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1317 | list_move(&qd->qd_list, head); |
1318 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1319 | schedule(); |
0a7ab79c | 1320 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1321 | continue; |
1322 | } | |
1323 | ||
1324 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1325 | /* Also remove if this qd exists in the reclaim list */ |
1326 | if (!list_empty(&qd->qd_reclaim)) { | |
1327 | list_del_init(&qd->qd_reclaim); | |
1328 | atomic_dec(&qd_lru_count); | |
1329 | } | |
b3b94faa | 1330 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1331 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1332 | |
0a7ab79c | 1333 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1334 | gfs2_assert_warn(sdp, !qd->qd_change); |
1335 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1336 | } else | |
1337 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1338 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1339 | ||
f057f6cd | 1340 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1341 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1342 | |
0a7ab79c | 1343 | spin_lock(&qd_lru_lock); |
b3b94faa | 1344 | } |
0a7ab79c | 1345 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1346 | |
1347 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1348 | ||
1349 | if (sdp->sd_quota_bitmap) { | |
1350 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1351 | kfree(sdp->sd_quota_bitmap[x]); | |
1352 | kfree(sdp->sd_quota_bitmap); | |
1353 | } | |
1354 | } | |
1355 | ||
37b2c837 SW |
1356 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1357 | { | |
1358 | if (error == 0 || error == -EROFS) | |
1359 | return; | |
1360 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1361 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1362 | } | |
1363 | ||
1364 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1365 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1366 | unsigned long t, unsigned long *timeo, |
1367 | unsigned int *new_timeo) | |
1368 | { | |
1369 | if (t >= *timeo) { | |
8c42d637 | 1370 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1371 | quotad_error(sdp, msg, error); |
1372 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1373 | } else { | |
1374 | *timeo -= t; | |
1375 | } | |
1376 | } | |
1377 | ||
813e0c46 SW |
1378 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1379 | { | |
1380 | struct gfs2_inode *ip; | |
1381 | ||
1382 | while(1) { | |
1383 | ip = NULL; | |
1384 | spin_lock(&sdp->sd_trunc_lock); | |
1385 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1386 | ip = list_entry(sdp->sd_trunc_list.next, | |
1387 | struct gfs2_inode, i_trunc_list); | |
1388 | list_del_init(&ip->i_trunc_list); | |
1389 | } | |
1390 | spin_unlock(&sdp->sd_trunc_lock); | |
1391 | if (ip == NULL) | |
1392 | return; | |
1393 | gfs2_glock_finish_truncate(ip); | |
1394 | } | |
1395 | } | |
1396 | ||
3d3c10f2 BM |
1397 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1398 | if (!sdp->sd_statfs_force_sync) { | |
1399 | sdp->sd_statfs_force_sync = 1; | |
1400 | wake_up(&sdp->sd_quota_wait); | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | ||
37b2c837 SW |
1405 | /** |
1406 | * gfs2_quotad - Write cached quota changes into the quota file | |
1407 | * @sdp: Pointer to GFS2 superblock | |
1408 | * | |
1409 | */ | |
1410 | ||
1411 | int gfs2_quotad(void *data) | |
1412 | { | |
1413 | struct gfs2_sbd *sdp = data; | |
1414 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1415 | unsigned long statfs_timeo = 0; | |
1416 | unsigned long quotad_timeo = 0; | |
1417 | unsigned long t = 0; | |
1418 | DEFINE_WAIT(wait); | |
813e0c46 | 1419 | int empty; |
37b2c837 SW |
1420 | |
1421 | while (!kthread_should_stop()) { | |
1422 | ||
1423 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1424 | if (sdp->sd_statfs_force_sync) { |
1425 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1426 | quotad_error(sdp, "statfs", error); | |
1427 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1428 | } | |
1429 | else | |
1430 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1431 | &statfs_timeo, | |
1432 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1433 | |
1434 | /* Update quota file */ | |
5fb324ad | 1435 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t, |
37b2c837 SW |
1436 | "ad_timeo, &tune->gt_quota_quantum); |
1437 | ||
813e0c46 SW |
1438 | /* Check for & recover partially truncated inodes */ |
1439 | quotad_check_trunc_list(sdp); | |
1440 | ||
a0acae0e TH |
1441 | try_to_freeze(); |
1442 | ||
37b2c837 SW |
1443 | t = min(quotad_timeo, statfs_timeo); |
1444 | ||
7fa5d20d | 1445 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1446 | spin_lock(&sdp->sd_trunc_lock); |
1447 | empty = list_empty(&sdp->sd_trunc_list); | |
1448 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1449 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1450 | t -= schedule_timeout(t); |
1451 | else | |
1452 | t = 0; | |
37b2c837 SW |
1453 | finish_wait(&sdp->sd_quota_wait, &wait); |
1454 | } | |
1455 | ||
1456 | return 0; | |
1457 | } | |
1458 | ||
1d371b5e SW |
1459 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1460 | struct fs_quota_stat *fqs) | |
1461 | { | |
1462 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1463 | ||
1464 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1465 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1466 | |
1467 | switch (sdp->sd_args.ar_quota) { | |
1468 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1469 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1470 | /*FALLTHRU*/ |
1471 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1472 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1473 | break; |
1474 | case GFS2_QUOTA_OFF: | |
1475 | break; | |
1476 | } | |
1477 | ||
1d371b5e SW |
1478 | if (sdp->sd_quota_inode) { |
1479 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1480 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1481 | } | |
1482 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1483 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1484 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1485 | return 0; | |
1486 | } | |
1487 | ||
74a8a103 | 1488 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1489 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1490 | { |
1491 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1492 | struct gfs2_quota_lvb *qlvb; | |
1493 | struct gfs2_quota_data *qd; | |
1494 | struct gfs2_holder q_gh; | |
1495 | int error; | |
74a8a103 | 1496 | int type; |
113d6b3c SW |
1497 | |
1498 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1499 | ||
1500 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1501 | return -ESRCH; /* Crazy XFS error code */ | |
1502 | ||
74a8a103 | 1503 | if (qid.type == USRQUOTA) |
113d6b3c | 1504 | type = QUOTA_USER; |
74a8a103 | 1505 | else if (qid.type == GRPQUOTA) |
113d6b3c SW |
1506 | type = QUOTA_GROUP; |
1507 | else | |
1508 | return -EINVAL; | |
1509 | ||
74a8a103 | 1510 | error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd); |
113d6b3c SW |
1511 | if (error) |
1512 | return error; | |
1513 | error = do_glock(qd, FORCE, &q_gh); | |
1514 | if (error) | |
1515 | goto out; | |
1516 | ||
4e2f8849 | 1517 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1518 | fdq->d_version = FS_DQUOT_VERSION; |
ade7ce31 | 1519 | fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1520 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1521 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1522 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1523 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1524 | |
1525 | gfs2_glock_dq_uninit(&q_gh); | |
1526 | out: | |
1527 | qd_put(qd); | |
1528 | return error; | |
1529 | } | |
1530 | ||
e285c100 | 1531 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1532 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1533 | |
74a8a103 | 1534 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1535 | struct fs_disk_quota *fdq) |
e285c100 SW |
1536 | { |
1537 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1538 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1539 | struct gfs2_quota_data *qd; | |
1540 | struct gfs2_holder q_gh, i_gh; | |
1541 | unsigned int data_blocks, ind_blocks; | |
1542 | unsigned int blocks = 0; | |
1543 | int alloc_required; | |
e285c100 SW |
1544 | loff_t offset; |
1545 | int error; | |
74a8a103 | 1546 | int type; |
e285c100 SW |
1547 | |
1548 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1549 | return -ESRCH; /* Crazy XFS error code */ | |
1550 | ||
74a8a103 | 1551 | switch(qid.type) { |
e285c100 SW |
1552 | case USRQUOTA: |
1553 | type = QUOTA_USER; | |
e285c100 SW |
1554 | break; |
1555 | case GRPQUOTA: | |
1556 | type = QUOTA_GROUP; | |
e285c100 SW |
1557 | break; |
1558 | default: | |
1559 | return -EINVAL; | |
1560 | } | |
1561 | ||
1562 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1563 | return -EINVAL; | |
e285c100 | 1564 | |
74a8a103 | 1565 | error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd); |
e285c100 SW |
1566 | if (error) |
1567 | return error; | |
1568 | ||
0a305e49 BP |
1569 | error = gfs2_rs_alloc(ip); |
1570 | if (error) | |
1571 | goto out_put; | |
1572 | ||
e285c100 SW |
1573 | mutex_lock(&ip->i_inode.i_mutex); |
1574 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1575 | if (error) | |
0a305e49 | 1576 | goto out_unlockput; |
e285c100 SW |
1577 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1578 | if (error) | |
1579 | goto out_q; | |
1580 | ||
1581 | /* Check for existing entry, if none then alloc new blocks */ | |
1582 | error = update_qd(sdp, qd); | |
1583 | if (error) | |
1584 | goto out_i; | |
1585 | ||
1586 | /* If nothing has changed, this is a no-op */ | |
1587 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1588 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1589 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1590 | |
e285c100 | 1591 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1592 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1593 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1594 | |
1595 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1596 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1597 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1598 | ||
e285c100 SW |
1599 | if (fdq->d_fieldmask == 0) |
1600 | goto out_i; | |
1601 | ||
1602 | offset = qd2offset(qd); | |
461cb419 | 1603 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1604 | if (gfs2_is_stuffed(ip)) |
1605 | alloc_required = 1; | |
e285c100 | 1606 | if (alloc_required) { |
e285c100 SW |
1607 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1608 | &data_blocks, &ind_blocks); | |
564e12b1 | 1609 | blocks = 1 + data_blocks + ind_blocks; |
9dbe9610 | 1610 | error = gfs2_inplace_reserve(ip, blocks, 0); |
e285c100 | 1611 | if (error) |
564e12b1 | 1612 | goto out_i; |
71f890f7 | 1613 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1614 | } |
1615 | ||
e79a46a0 AD |
1616 | /* Some quotas span block boundaries and can update two blocks, |
1617 | adding an extra block to the transaction to handle such quotas */ | |
1618 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1619 | if (error) |
1620 | goto out_release; | |
1621 | ||
1622 | /* Apply changes */ | |
1623 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1624 | ||
1625 | gfs2_trans_end(sdp); | |
1626 | out_release: | |
564e12b1 | 1627 | if (alloc_required) |
e285c100 | 1628 | gfs2_inplace_release(ip); |
e285c100 SW |
1629 | out_i: |
1630 | gfs2_glock_dq_uninit(&i_gh); | |
1631 | out_q: | |
1632 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1633 | out_unlockput: |
e285c100 | 1634 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1635 | out_put: |
e285c100 SW |
1636 | qd_put(qd); |
1637 | return error; | |
1638 | } | |
1639 | ||
cc632e7f SW |
1640 | const struct quotactl_ops gfs2_quotactl_ops = { |
1641 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1642 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1643 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1644 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1645 | }; |