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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0d0868bd | 3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
10 | /* | |
11 | * Quota change tags are associated with each transaction that allocates or | |
12 | * deallocates space. Those changes are accumulated locally to each node (in a | |
13 | * per-node file) and then are periodically synced to the quota file. This | |
14 | * avoids the bottleneck of constantly touching the quota file, but introduces | |
15 | * fuzziness in the current usage value of IDs that are being used on different | |
16 | * nodes in the cluster simultaneously. So, it is possible for a user on | |
17 | * multiple nodes to overrun their quota, but that overrun is controlable. | |
1e72c0f7 | 18 | * Since quota tags are part of transactions, there is no need for a quota check |
b3b94faa DT |
19 | * program to be run on node crashes or anything like that. |
20 | * | |
21 | * There are couple of knobs that let the administrator manage the quota | |
22 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be | |
23 | * sitting on one node before being synced to the quota file. (The default is | |
24 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency | |
25 | * of quota file syncs increases as the user moves closer to their limit. The | |
26 | * more frequent the syncs, the more accurate the quota enforcement, but that | |
27 | * means that there is more contention between the nodes for the quota file. | |
28 | * The default value is one. This sets the maximum theoretical quota overrun | |
29 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In | |
30 | * practice, the maximum overrun you see should be much less.) A "quota_scale" | |
31 | * number greater than one makes quota syncs more frequent and reduces the | |
32 | * maximum overrun. Numbers less than one (but greater than zero) make quota | |
33 | * syncs less frequent. | |
34 | * | |
35 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of | |
36 | * the quota file, so it is not being constantly read. | |
37 | */ | |
38 | ||
39 | #include <linux/sched.h> | |
40 | #include <linux/slab.h> | |
1495f230 | 41 | #include <linux/mm.h> |
b3b94faa DT |
42 | #include <linux/spinlock.h> |
43 | #include <linux/completion.h> | |
44 | #include <linux/buffer_head.h> | |
b3b94faa | 45 | #include <linux/sort.h> |
18ec7d5c | 46 | #include <linux/fs.h> |
2e565bb6 | 47 | #include <linux/bio.h> |
5c676f6d | 48 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
49 | #include <linux/kthread.h> |
50 | #include <linux/freezer.h> | |
2ec46505 | 51 | #include <linux/quota.h> |
1d371b5e | 52 | #include <linux/dqblk_xfs.h> |
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 | { | |
05e0a60d EB |
125 | struct kqid qid = qd->qd_id; |
126 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + | |
127 | (qid.type == USRQUOTA) ? 0 : 1; | |
2f6c9896 EB |
128 | } |
129 | ||
cd915493 | 130 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 131 | { |
cd915493 | 132 | u64 offset; |
b3b94faa | 133 | |
2f6c9896 | 134 | offset = qd2index(qd); |
b3b94faa DT |
135 | offset *= sizeof(struct gfs2_quota); |
136 | ||
137 | return offset; | |
138 | } | |
139 | ||
05e0a60d | 140 | static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
141 | struct gfs2_quota_data **qdp) |
142 | { | |
143 | struct gfs2_quota_data *qd; | |
144 | int error; | |
145 | ||
37b2c837 | 146 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
147 | if (!qd) |
148 | return -ENOMEM; | |
149 | ||
0a7ab79c | 150 | atomic_set(&qd->qd_count, 1); |
05e0a60d | 151 | qd->qd_id = qid; |
b3b94faa | 152 | qd->qd_slot = -1; |
0a7ab79c | 153 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 154 | |
2f6c9896 | 155 | error = gfs2_glock_get(sdp, qd2index(qd), |
b3b94faa DT |
156 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
157 | if (error) | |
158 | goto fail; | |
159 | ||
b3b94faa DT |
160 | *qdp = qd; |
161 | ||
162 | return 0; | |
163 | ||
a91ea69f | 164 | fail: |
37b2c837 | 165 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
166 | return error; |
167 | } | |
168 | ||
05e0a60d | 169 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
170 | struct gfs2_quota_data **qdp) |
171 | { | |
172 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
173 | int error, found; | |
174 | ||
175 | *qdp = NULL; | |
176 | ||
177 | for (;;) { | |
178 | found = 0; | |
0a7ab79c | 179 | spin_lock(&qd_lru_lock); |
b3b94faa | 180 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
05e0a60d | 181 | if (qid_eq(qd->qd_id, qid)) { |
0a7ab79c AD |
182 | if (!atomic_read(&qd->qd_count) && |
183 | !list_empty(&qd->qd_reclaim)) { | |
184 | /* Remove it from reclaim list */ | |
185 | list_del_init(&qd->qd_reclaim); | |
186 | atomic_dec(&qd_lru_count); | |
187 | } | |
188 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
189 | found = 1; |
190 | break; | |
191 | } | |
192 | } | |
193 | ||
194 | if (!found) | |
195 | qd = NULL; | |
196 | ||
197 | if (!qd && new_qd) { | |
198 | qd = new_qd; | |
199 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
200 | atomic_inc(&sdp->sd_quota_count); | |
201 | new_qd = NULL; | |
202 | } | |
203 | ||
0a7ab79c | 204 | spin_unlock(&qd_lru_lock); |
b3b94faa | 205 | |
6a6ada81 | 206 | if (qd) { |
b3b94faa | 207 | if (new_qd) { |
f057f6cd | 208 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 209 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
210 | } |
211 | *qdp = qd; | |
212 | return 0; | |
213 | } | |
214 | ||
05e0a60d | 215 | error = qd_alloc(sdp, qid, &new_qd); |
b3b94faa DT |
216 | if (error) |
217 | return error; | |
218 | } | |
219 | } | |
220 | ||
221 | static void qd_hold(struct gfs2_quota_data *qd) | |
222 | { | |
223 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
0a7ab79c AD |
224 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
225 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
226 | } |
227 | ||
228 | static void qd_put(struct gfs2_quota_data *qd) | |
229 | { | |
0a7ab79c AD |
230 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
231 | /* Add to the reclaim list */ | |
232 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
233 | atomic_inc(&qd_lru_count); | |
234 | spin_unlock(&qd_lru_lock); | |
235 | } | |
b3b94faa DT |
236 | } |
237 | ||
238 | static int slot_get(struct gfs2_quota_data *qd) | |
239 | { | |
240 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
241 | unsigned int c, o = 0, b; | |
242 | unsigned char byte = 0; | |
243 | ||
22077f57 | 244 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
245 | |
246 | if (qd->qd_slot_count++) { | |
22077f57 | 247 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
248 | return 0; |
249 | } | |
250 | ||
251 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
252 | for (o = 0; o < PAGE_SIZE; o++) { | |
253 | byte = sdp->sd_quota_bitmap[c][o]; | |
254 | if (byte != 0xFF) | |
255 | goto found; | |
256 | } | |
257 | ||
258 | goto fail; | |
259 | ||
a91ea69f | 260 | found: |
b3b94faa DT |
261 | for (b = 0; b < 8; b++) |
262 | if (!(byte & (1 << b))) | |
263 | break; | |
264 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
265 | ||
266 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
267 | goto fail; | |
268 | ||
269 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
270 | ||
22077f57 | 271 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
272 | |
273 | return 0; | |
274 | ||
a91ea69f | 275 | fail: |
b3b94faa | 276 | qd->qd_slot_count--; |
22077f57 | 277 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
278 | return -ENOSPC; |
279 | } | |
280 | ||
281 | static void slot_hold(struct gfs2_quota_data *qd) | |
282 | { | |
283 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
284 | ||
22077f57 | 285 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
286 | gfs2_assert(sdp, qd->qd_slot_count); |
287 | qd->qd_slot_count++; | |
22077f57 | 288 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
289 | } |
290 | ||
291 | static void slot_put(struct gfs2_quota_data *qd) | |
292 | { | |
293 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
294 | ||
22077f57 | 295 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
296 | gfs2_assert(sdp, qd->qd_slot_count); |
297 | if (!--qd->qd_slot_count) { | |
298 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
299 | qd->qd_slot = -1; | |
300 | } | |
22077f57 | 301 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
302 | } |
303 | ||
304 | static int bh_get(struct gfs2_quota_data *qd) | |
305 | { | |
306 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 307 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 308 | unsigned int block, offset; |
b3b94faa DT |
309 | struct buffer_head *bh; |
310 | int error; | |
23591256 | 311 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 312 | |
f55ab26a | 313 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
314 | |
315 | if (qd->qd_bh_count++) { | |
f55ab26a | 316 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
317 | return 0; |
318 | } | |
319 | ||
320 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 321 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 322 | |
23591256 | 323 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 324 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
325 | if (error) |
326 | goto fail; | |
7276b3b0 | 327 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
328 | if (error) |
329 | goto fail; | |
330 | error = -EIO; | |
331 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
332 | goto fail_brelse; | |
333 | ||
334 | qd->qd_bh = bh; | |
335 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
336 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
337 | offset * sizeof(struct gfs2_quota_change)); | |
338 | ||
2e95b665 | 339 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
340 | |
341 | return 0; | |
342 | ||
a91ea69f | 343 | fail_brelse: |
b3b94faa | 344 | brelse(bh); |
a91ea69f | 345 | fail: |
b3b94faa | 346 | qd->qd_bh_count--; |
f55ab26a | 347 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
348 | return error; |
349 | } | |
350 | ||
351 | static void bh_put(struct gfs2_quota_data *qd) | |
352 | { | |
353 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
354 | ||
f55ab26a | 355 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
356 | gfs2_assert(sdp, qd->qd_bh_count); |
357 | if (!--qd->qd_bh_count) { | |
358 | brelse(qd->qd_bh); | |
359 | qd->qd_bh = NULL; | |
360 | qd->qd_bh_qc = NULL; | |
361 | } | |
f55ab26a | 362 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
363 | } |
364 | ||
365 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
366 | { | |
367 | struct gfs2_quota_data *qd = NULL; | |
368 | int error; | |
369 | int found = 0; | |
370 | ||
371 | *qdp = NULL; | |
372 | ||
373 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
374 | return 0; | |
375 | ||
0a7ab79c | 376 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
377 | |
378 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
379 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
380 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
381 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
382 | continue; | |
383 | ||
384 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
385 | ||
386 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
387 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
388 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
389 | qd->qd_change_sync = qd->qd_change; |
390 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
391 | qd->qd_slot_count++; | |
392 | found = 1; | |
393 | ||
394 | break; | |
395 | } | |
396 | ||
397 | if (!found) | |
398 | qd = NULL; | |
399 | ||
0a7ab79c | 400 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
401 | |
402 | if (qd) { | |
403 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
404 | error = bh_get(qd); | |
405 | if (error) { | |
406 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
407 | slot_put(qd); | |
408 | qd_put(qd); | |
409 | return error; | |
410 | } | |
411 | } | |
412 | ||
413 | *qdp = qd; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | static int qd_trylock(struct gfs2_quota_data *qd) | |
419 | { | |
420 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
421 | ||
422 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
423 | return 0; | |
424 | ||
0a7ab79c | 425 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
426 | |
427 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
428 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 429 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
430 | return 0; |
431 | } | |
432 | ||
433 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
434 | ||
435 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
436 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
437 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
438 | qd->qd_change_sync = qd->qd_change; |
439 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
440 | qd->qd_slot_count++; | |
441 | ||
0a7ab79c | 442 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
443 | |
444 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
445 | if (bh_get(qd)) { | |
446 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
447 | slot_put(qd); | |
448 | qd_put(qd); | |
449 | return 0; | |
450 | } | |
451 | ||
452 | return 1; | |
453 | } | |
454 | ||
455 | static void qd_unlock(struct gfs2_quota_data *qd) | |
456 | { | |
568f4c96 SW |
457 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
458 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
459 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
460 | bh_put(qd); | |
461 | slot_put(qd); | |
462 | qd_put(qd); | |
463 | } | |
464 | ||
b59c8b6f | 465 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
b3b94faa DT |
466 | struct gfs2_quota_data **qdp) |
467 | { | |
468 | int error; | |
469 | ||
05e0a60d | 470 | error = qd_get(sdp, qid, qdp); |
b3b94faa DT |
471 | if (error) |
472 | return error; | |
473 | ||
474 | error = slot_get(*qdp); | |
475 | if (error) | |
476 | goto fail; | |
477 | ||
478 | error = bh_get(*qdp); | |
479 | if (error) | |
480 | goto fail_slot; | |
481 | ||
482 | return 0; | |
483 | ||
a91ea69f | 484 | fail_slot: |
b3b94faa | 485 | slot_put(*qdp); |
a91ea69f | 486 | fail: |
b3b94faa DT |
487 | qd_put(*qdp); |
488 | return error; | |
489 | } | |
490 | ||
491 | static void qdsb_put(struct gfs2_quota_data *qd) | |
492 | { | |
493 | bh_put(qd); | |
494 | slot_put(qd); | |
495 | qd_put(qd); | |
496 | } | |
497 | ||
cd915493 | 498 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 499 | { |
feaa7bba | 500 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 501 | struct gfs2_quota_data **qd; |
b3b94faa DT |
502 | int error; |
503 | ||
aaaf68c5 AP |
504 | if (ip->i_res == NULL) { |
505 | error = gfs2_rs_alloc(ip); | |
506 | if (error) | |
507 | return error; | |
508 | } | |
5407e242 BP |
509 | |
510 | qd = ip->i_res->rs_qa_qd; | |
511 | ||
512 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
513 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
514 | return -EIO; | |
515 | ||
516 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
517 | return 0; | |
518 | ||
b59c8b6f | 519 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
b3b94faa DT |
520 | if (error) |
521 | goto out; | |
5407e242 | 522 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
523 | qd++; |
524 | ||
b59c8b6f | 525 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
b3b94faa DT |
526 | if (error) |
527 | goto out; | |
5407e242 | 528 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
529 | qd++; |
530 | ||
f4108a60 | 531 | if (uid != NO_UID_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
b59c8b6f | 532 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
b3b94faa DT |
533 | if (error) |
534 | goto out; | |
5407e242 | 535 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
536 | qd++; |
537 | } | |
538 | ||
f4108a60 | 539 | if (gid != NO_GID_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
b59c8b6f | 540 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
b3b94faa DT |
541 | if (error) |
542 | goto out; | |
5407e242 | 543 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
544 | qd++; |
545 | } | |
546 | ||
a91ea69f | 547 | out: |
b3b94faa DT |
548 | if (error) |
549 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
550 | return error; |
551 | } | |
552 | ||
553 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
554 | { | |
feaa7bba | 555 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
556 | unsigned int x; |
557 | ||
5407e242 BP |
558 | if (ip->i_res == NULL) |
559 | return; | |
b3b94faa DT |
560 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
561 | ||
5407e242 BP |
562 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
563 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
564 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 565 | } |
5407e242 | 566 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
567 | } |
568 | ||
569 | static int sort_qd(const void *a, const void *b) | |
570 | { | |
48fac179 SW |
571 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
572 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa | 573 | |
05e0a60d | 574 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
48fac179 | 575 | return -1; |
05e0a60d | 576 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
48fac179 | 577 | return 1; |
48fac179 | 578 | return 0; |
b3b94faa DT |
579 | } |
580 | ||
cd915493 | 581 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
582 | { |
583 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 584 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 585 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 586 | s64 x; |
b3b94faa | 587 | |
f55ab26a | 588 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 589 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
590 | |
591 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
592 | qc->qc_change = 0; | |
593 | qc->qc_flags = 0; | |
05e0a60d | 594 | if (qd->qd_id.type == USRQUOTA) |
b3b94faa | 595 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
05e0a60d | 596 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
b3b94faa DT |
597 | } |
598 | ||
b44b84d7 | 599 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
600 | qc->qc_change = cpu_to_be64(x); |
601 | ||
22077f57 | 602 | spin_lock(&qd_lru_lock); |
b3b94faa | 603 | qd->qd_change = x; |
22077f57 | 604 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
605 | |
606 | if (!x) { | |
607 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
608 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
609 | qc->qc_flags = 0; | |
610 | qc->qc_id = 0; | |
611 | slot_put(qd); | |
612 | qd_put(qd); | |
613 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
614 | qd_hold(qd); | |
615 | slot_hold(qd); | |
616 | } | |
907b9bce | 617 | |
f55ab26a | 618 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
619 | } |
620 | ||
18ec7d5c | 621 | /** |
1e72c0f7 SW |
622 | * gfs2_adjust_quota - adjust record of current block usage |
623 | * @ip: The quota inode | |
624 | * @loc: Offset of the entry in the quota file | |
e285c100 | 625 | * @change: The amount of usage change to record |
1e72c0f7 | 626 | * @qd: The quota data |
e285c100 | 627 | * @fdq: The updated limits to record |
18ec7d5c SW |
628 | * |
629 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
630 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
631 | * |
632 | * Returns: 0 or -ve on error | |
18ec7d5c | 633 | */ |
1e72c0f7 | 634 | |
18ec7d5c | 635 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
636 | s64 change, struct gfs2_quota_data *qd, |
637 | struct fs_disk_quota *fdq) | |
18ec7d5c | 638 | { |
feaa7bba | 639 | struct inode *inode = &ip->i_inode; |
14870b45 | 640 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
641 | struct address_space *mapping = inode->i_mapping; |
642 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 643 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 644 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 645 | struct buffer_head *bh; |
18ec7d5c | 646 | struct page *page; |
7e619bc3 AD |
647 | void *kaddr, *ptr; |
648 | struct gfs2_quota q, *qp; | |
649 | int err, nbytes; | |
e285c100 | 650 | u64 size; |
18ec7d5c | 651 | |
891a8e93 SW |
652 | if (gfs2_is_stuffed(ip)) { |
653 | err = gfs2_unstuff_dinode(ip, NULL); | |
654 | if (err) | |
655 | return err; | |
656 | } | |
7e619bc3 AD |
657 | |
658 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 659 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
660 | if (err < 0) |
661 | return err; | |
662 | ||
663 | err = -EIO; | |
664 | qp = &q; | |
665 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
666 | qp->qu_value += change; | |
667 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
668 | qd->qd_qb.qb_value = qp->qu_value; | |
669 | if (fdq) { | |
670 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 671 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
672 | qd->qd_qb.qb_warn = qp->qu_warn; |
673 | } | |
674 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 675 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
676 | qd->qd_qb.qb_limit = qp->qu_limit; |
677 | } | |
802ec9b6 AD |
678 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
679 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
680 | qd->qd_qb.qb_value = qp->qu_value; | |
681 | } | |
7e619bc3 AD |
682 | } |
683 | ||
684 | /* Write the quota into the quota file on disk */ | |
685 | ptr = qp; | |
686 | nbytes = sizeof(struct gfs2_quota); | |
687 | get_a_page: | |
220cca2a | 688 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
689 | if (!page) |
690 | return -ENOMEM; | |
691 | ||
692 | blocksize = inode->i_sb->s_blocksize; | |
693 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
694 | ||
695 | if (!page_has_buffers(page)) | |
696 | create_empty_buffers(page, blocksize, 0); | |
697 | ||
698 | bh = page_buffers(page); | |
699 | pos = blocksize; | |
700 | while (offset >= pos) { | |
701 | bh = bh->b_this_page; | |
702 | iblock++; | |
703 | pos += blocksize; | |
704 | } | |
705 | ||
706 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 707 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 708 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
709 | goto unlock_out; |
710 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
711 | if (buffer_new(bh)) |
712 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
713 | } |
714 | ||
715 | if (PageUptodate(page)) | |
716 | set_buffer_uptodate(bh); | |
717 | ||
718 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 719 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
720 | wait_on_buffer(bh); |
721 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 722 | goto unlock_out; |
18ec7d5c SW |
723 | } |
724 | ||
725 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
726 | ||
d9349285 | 727 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
728 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
729 | nbytes = PAGE_CACHE_SIZE - offset; | |
730 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 731 | flush_dcache_page(page); |
d9349285 | 732 | kunmap_atomic(kaddr); |
7e619bc3 AD |
733 | unlock_page(page); |
734 | page_cache_release(page); | |
735 | ||
736 | /* If quota straddles page boundary, we need to update the rest of the | |
737 | * quota at the beginning of the next page */ | |
8b421601 | 738 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
739 | ptr = ptr + nbytes; |
740 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
741 | offset = 0; | |
742 | index++; | |
743 | goto get_a_page; | |
744 | } | |
e285c100 | 745 | |
e285c100 | 746 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 747 | if (size > inode->i_size) |
e285c100 | 748 | i_size_write(inode, size); |
e285c100 | 749 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 750 | mark_inode_dirty(inode); |
500242ac | 751 | return 0; |
ab9bbda0 | 752 | |
7e619bc3 | 753 | unlock_out: |
18ec7d5c SW |
754 | unlock_page(page); |
755 | page_cache_release(page); | |
756 | return err; | |
757 | } | |
758 | ||
b3b94faa DT |
759 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
760 | { | |
761 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 762 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
763 | unsigned int data_blocks, ind_blocks; |
764 | struct gfs2_holder *ghs, i_gh; | |
765 | unsigned int qx, x; | |
766 | struct gfs2_quota_data *qd; | |
71f890f7 | 767 | unsigned reserved; |
f42faf4f | 768 | loff_t offset; |
20b95bf2 | 769 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
770 | int error; |
771 | ||
0a305e49 BP |
772 | error = gfs2_rs_alloc(ip); |
773 | if (error) | |
774 | return error; | |
775 | ||
b3b94faa DT |
776 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
777 | &data_blocks, &ind_blocks); | |
778 | ||
16c5f06f | 779 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
780 | if (!ghs) |
781 | return -ENOMEM; | |
782 | ||
783 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 784 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 785 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 786 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
787 | GL_NOCACHE, &ghs[qx]); |
788 | if (error) | |
789 | goto out; | |
790 | } | |
791 | ||
792 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
793 | if (error) | |
794 | goto out; | |
795 | ||
796 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 797 | offset = qd2offset(qda[x]); |
461cb419 BP |
798 | if (gfs2_write_alloc_required(ip, offset, |
799 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
800 | nalloc++; |
801 | } | |
802 | ||
20b95bf2 AD |
803 | /* |
804 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
805 | * block to the reservation unconditionally. If the inode | |
806 | * doesn't need unstuffing, the block will be released to the | |
807 | * rgrp since it won't be allocated during the transaction | |
808 | */ | |
7e619bc3 AD |
809 | /* +3 in the end for unstuffing block, inode size update block |
810 | * and another block in case quota straddles page boundary and | |
811 | * two blocks need to be updated instead of 1 */ | |
812 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 813 | |
71f890f7 | 814 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
9dbe9610 | 815 | error = gfs2_inplace_reserve(ip, reserved, 0); |
20b95bf2 AD |
816 | if (error) |
817 | goto out_alloc; | |
b3b94faa | 818 | |
20b95bf2 | 819 | if (nalloc) |
71f890f7 | 820 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
821 | |
822 | error = gfs2_trans_begin(sdp, blocks, 0); | |
823 | if (error) | |
824 | goto out_ipres; | |
b3b94faa DT |
825 | |
826 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
827 | qd = qda[x]; |
828 | offset = qd2offset(qd); | |
e285c100 | 829 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 830 | if (error) |
b3b94faa | 831 | goto out_end_trans; |
b3b94faa DT |
832 | |
833 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 834 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
835 | } |
836 | ||
837 | error = 0; | |
838 | ||
a91ea69f | 839 | out_end_trans: |
b3b94faa | 840 | gfs2_trans_end(sdp); |
a91ea69f | 841 | out_ipres: |
20b95bf2 | 842 | gfs2_inplace_release(ip); |
a91ea69f | 843 | out_alloc: |
b3b94faa | 844 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 845 | out: |
b3b94faa DT |
846 | while (qx--) |
847 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 848 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 849 | kfree(ghs); |
b09e593d | 850 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
851 | return error; |
852 | } | |
853 | ||
e285c100 SW |
854 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
855 | { | |
856 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
857 | struct gfs2_quota q; | |
858 | struct gfs2_quota_lvb *qlvb; | |
859 | loff_t pos; | |
860 | int error; | |
861 | ||
862 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
863 | pos = qd2offset(qd); | |
4306629e | 864 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
865 | if (error < 0) |
866 | return error; | |
867 | ||
4e2f8849 | 868 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
869 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
870 | qlvb->__pad = 0; | |
871 | qlvb->qb_limit = q.qu_limit; | |
872 | qlvb->qb_warn = q.qu_warn; | |
873 | qlvb->qb_value = q.qu_value; | |
874 | qd->qd_qb = *qlvb; | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
b3b94faa DT |
879 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
880 | struct gfs2_holder *q_gh) | |
881 | { | |
882 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 883 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 884 | struct gfs2_holder i_gh; |
b3b94faa DT |
885 | int error; |
886 | ||
a91ea69f | 887 | restart: |
b3b94faa DT |
888 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
889 | if (error) | |
890 | return error; | |
891 | ||
4e2f8849 | 892 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 893 | |
e9fc2aa0 | 894 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 895 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
896 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
897 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
898 | if (error) |
899 | return error; | |
900 | ||
e9fc2aa0 | 901 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
902 | if (error) |
903 | goto fail; | |
904 | ||
e285c100 SW |
905 | error = update_qd(sdp, qd); |
906 | if (error) | |
1e72c0f7 | 907 | goto fail_gunlock; |
b3b94faa | 908 | |
e285c100 | 909 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
910 | gfs2_glock_dq_uninit(q_gh); |
911 | force_refresh = 0; | |
912 | goto restart; | |
b3b94faa DT |
913 | } |
914 | ||
915 | return 0; | |
916 | ||
a91ea69f | 917 | fail_gunlock: |
b3b94faa | 918 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 919 | fail: |
b3b94faa | 920 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
921 | return error; |
922 | } | |
923 | ||
cd915493 | 924 | int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 925 | { |
feaa7bba | 926 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 927 | struct gfs2_quota_data *qd; |
b3b94faa DT |
928 | unsigned int x; |
929 | int error = 0; | |
930 | ||
891a8e93 SW |
931 | error = gfs2_quota_hold(ip, uid, gid); |
932 | if (error) | |
933 | return error; | |
b3b94faa DT |
934 | |
935 | if (capable(CAP_SYS_RESOURCE) || | |
936 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
937 | return 0; | |
938 | ||
5407e242 BP |
939 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
940 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 941 | |
5407e242 | 942 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 943 | int force = NO_FORCE; |
5407e242 | 944 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
945 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
946 | force = FORCE; | |
5407e242 | 947 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
948 | if (error) |
949 | break; | |
950 | } | |
951 | ||
952 | if (!error) | |
953 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
954 | else { | |
955 | while (x--) | |
5407e242 | 956 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
957 | gfs2_quota_unhold(ip); |
958 | } | |
959 | ||
960 | return error; | |
961 | } | |
962 | ||
963 | static int need_sync(struct gfs2_quota_data *qd) | |
964 | { | |
965 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
966 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 967 | s64 value; |
b3b94faa DT |
968 | unsigned int num, den; |
969 | int do_sync = 1; | |
970 | ||
971 | if (!qd->qd_qb.qb_limit) | |
972 | return 0; | |
973 | ||
22077f57 | 974 | spin_lock(&qd_lru_lock); |
b3b94faa | 975 | value = qd->qd_change; |
22077f57 | 976 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
977 | |
978 | spin_lock(>->gt_spin); | |
979 | num = gt->gt_quota_scale_num; | |
980 | den = gt->gt_quota_scale_den; | |
981 | spin_unlock(>->gt_spin); | |
982 | ||
983 | if (value < 0) | |
984 | do_sync = 0; | |
e9fc2aa0 SW |
985 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
986 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
987 | do_sync = 0; |
988 | else { | |
989 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 990 | value = div_s64(value, den); |
e9fc2aa0 | 991 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 992 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
993 | do_sync = 0; |
994 | } | |
995 | ||
996 | return do_sync; | |
997 | } | |
998 | ||
999 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1000 | { | |
b3b94faa DT |
1001 | struct gfs2_quota_data *qda[4]; |
1002 | unsigned int count = 0; | |
1003 | unsigned int x; | |
1004 | ||
1005 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1006 | goto out; | |
1007 | ||
5407e242 | 1008 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1009 | struct gfs2_quota_data *qd; |
1010 | int sync; | |
1011 | ||
5407e242 | 1012 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1013 | sync = need_sync(qd); |
1014 | ||
5407e242 | 1015 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
1016 | |
1017 | if (sync && qd_trylock(qd)) | |
1018 | qda[count++] = qd; | |
1019 | } | |
1020 | ||
1021 | if (count) { | |
1022 | do_sync(count, qda); | |
1023 | for (x = 0; x < count; x++) | |
1024 | qd_unlock(qda[x]); | |
1025 | } | |
1026 | ||
a91ea69f | 1027 | out: |
b3b94faa DT |
1028 | gfs2_quota_unhold(ip); |
1029 | } | |
1030 | ||
1031 | #define MAX_LINE 256 | |
1032 | ||
1033 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1034 | { | |
1035 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1036 | |
2ec46505 | 1037 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 | 1038 | sdp->sd_fsname, type, |
05e0a60d EB |
1039 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
1040 | from_kqid(&init_user_ns, qd->qd_id)); | |
b3b94faa DT |
1041 | |
1042 | return 0; | |
1043 | } | |
1044 | ||
cd915493 | 1045 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 1046 | { |
feaa7bba | 1047 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1048 | struct gfs2_quota_data *qd; |
cd915493 | 1049 | s64 value; |
b3b94faa DT |
1050 | unsigned int x; |
1051 | int error = 0; | |
1052 | ||
1053 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1054 | return 0; | |
1055 | ||
1056 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1057 | return 0; | |
1058 | ||
5407e242 BP |
1059 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1060 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1061 | |
05e0a60d EB |
1062 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1063 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) | |
b3b94faa DT |
1064 | continue; |
1065 | ||
e9fc2aa0 | 1066 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1067 | spin_lock(&qd_lru_lock); |
b3b94faa | 1068 | value += qd->qd_change; |
22077f57 | 1069 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1070 | |
cd915493 | 1071 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1072 | print_message(qd, "exceeded"); |
05e0a60d | 1073 | quota_send_warning(qd->qd_id, |
2ec46505 SW |
1074 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1075 | ||
b3b94faa DT |
1076 | error = -EDQUOT; |
1077 | break; | |
e9fc2aa0 | 1078 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1079 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1080 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1081 | gfs2_tune_get(sdp, |
1082 | gt_quota_warn_period) * HZ)) { | |
05e0a60d | 1083 | quota_send_warning(qd->qd_id, |
2ec46505 | 1084 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1085 | error = print_message(qd, "warning"); |
1086 | qd->qd_last_warn = jiffies; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | return error; | |
1091 | } | |
1092 | ||
cd915493 SW |
1093 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1094 | u32 uid, u32 gid) | |
b3b94faa | 1095 | { |
b3b94faa DT |
1096 | struct gfs2_quota_data *qd; |
1097 | unsigned int x; | |
b3b94faa | 1098 | |
feaa7bba | 1099 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1100 | return; |
383f01fb | 1101 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1102 | return; |
1103 | ||
5407e242 BP |
1104 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1105 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa | 1106 | |
05e0a60d EB |
1107 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
1108 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { | |
b3b94faa | 1109 | do_qc(qd, change); |
b3b94faa DT |
1110 | } |
1111 | } | |
1112 | } | |
1113 | ||
ceed1723 | 1114 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1115 | { |
8c42d637 | 1116 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
1117 | struct gfs2_quota_data **qda; |
1118 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1119 | unsigned int num_qd; | |
1120 | unsigned int x; | |
1121 | int error = 0; | |
1122 | ||
1123 | sdp->sd_quota_sync_gen++; | |
1124 | ||
1125 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1126 | if (!qda) | |
1127 | return -ENOMEM; | |
1128 | ||
1129 | do { | |
1130 | num_qd = 0; | |
1131 | ||
1132 | for (;;) { | |
1133 | error = qd_fish(sdp, qda + num_qd); | |
1134 | if (error || !qda[num_qd]) | |
1135 | break; | |
1136 | if (++num_qd == max_qd) | |
1137 | break; | |
1138 | } | |
1139 | ||
1140 | if (num_qd) { | |
1141 | if (!error) | |
1142 | error = do_sync(num_qd, qda); | |
1143 | if (!error) | |
1144 | for (x = 0; x < num_qd; x++) | |
1145 | qda[x]->qd_sync_gen = | |
1146 | sdp->sd_quota_sync_gen; | |
1147 | ||
1148 | for (x = 0; x < num_qd; x++) | |
1149 | qd_unlock(qda[x]); | |
1150 | } | |
1151 | } while (!error && num_qd == max_qd); | |
1152 | ||
1153 | kfree(qda); | |
1154 | ||
1155 | return error; | |
1156 | } | |
1157 | ||
5fb324ad CH |
1158 | static int gfs2_quota_sync_timeo(struct super_block *sb, int type) |
1159 | { | |
ceed1723 | 1160 | return gfs2_quota_sync(sb, type); |
5fb324ad CH |
1161 | } |
1162 | ||
ed87dabc | 1163 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
b3b94faa DT |
1164 | { |
1165 | struct gfs2_quota_data *qd; | |
1166 | struct gfs2_holder q_gh; | |
1167 | int error; | |
1168 | ||
05e0a60d | 1169 | error = qd_get(sdp, qid, &qd); |
b3b94faa DT |
1170 | if (error) |
1171 | return error; | |
1172 | ||
1173 | error = do_glock(qd, FORCE, &q_gh); | |
1174 | if (!error) | |
1175 | gfs2_glock_dq_uninit(&q_gh); | |
1176 | ||
1177 | qd_put(qd); | |
b3b94faa DT |
1178 | return error; |
1179 | } | |
1180 | ||
bb8d8a6f SW |
1181 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1182 | { | |
1183 | const struct gfs2_quota_change *str = buf; | |
1184 | ||
1185 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1186 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
e08d8d7f EB |
1187 | qc->qc_id = make_kqid(&init_user_ns, |
1188 | (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA, | |
1189 | be32_to_cpu(str->qc_id)); | |
bb8d8a6f SW |
1190 | } |
1191 | ||
b3b94faa DT |
1192 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1193 | { | |
feaa7bba | 1194 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1195 | u64 size = i_size_read(sdp->sd_qc_inode); |
1196 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1197 | unsigned int x, slot = 0; |
1198 | unsigned int found = 0; | |
cd915493 SW |
1199 | u64 dblock; |
1200 | u32 extlen = 0; | |
b3b94faa DT |
1201 | int error; |
1202 | ||
a2e0f799 | 1203 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1204 | return -EIO; |
a2e0f799 | 1205 | |
b3b94faa | 1206 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
5c676f6d | 1207 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1208 | |
1209 | error = -ENOMEM; | |
1210 | ||
1211 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1212 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1213 | if (!sdp->sd_quota_bitmap) |
1214 | return error; | |
1215 | ||
1216 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1217 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1218 | if (!sdp->sd_quota_bitmap[x]) |
1219 | goto fail; | |
1220 | } | |
1221 | ||
1222 | for (x = 0; x < blocks; x++) { | |
1223 | struct buffer_head *bh; | |
1224 | unsigned int y; | |
1225 | ||
1226 | if (!extlen) { | |
1227 | int new = 0; | |
feaa7bba | 1228 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1229 | if (error) |
1230 | goto fail; | |
1231 | } | |
b3b94faa | 1232 | error = -EIO; |
7276b3b0 SW |
1233 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1234 | if (!bh) | |
1235 | goto fail; | |
b3b94faa DT |
1236 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1237 | brelse(bh); | |
1238 | goto fail; | |
1239 | } | |
1240 | ||
7276b3b0 | 1241 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1242 | y++, slot++) { |
b62f963e | 1243 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1244 | struct gfs2_quota_data *qd; |
1245 | ||
1246 | gfs2_quota_change_in(&qc, bh->b_data + | |
1247 | sizeof(struct gfs2_meta_header) + | |
1248 | y * sizeof(struct gfs2_quota_change)); | |
1249 | if (!qc.qc_change) | |
1250 | continue; | |
1251 | ||
05e0a60d | 1252 | error = qd_alloc(sdp, qc.qc_id, &qd); |
b3b94faa DT |
1253 | if (error) { |
1254 | brelse(bh); | |
1255 | goto fail; | |
1256 | } | |
1257 | ||
1258 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1259 | qd->qd_change = qc.qc_change; | |
1260 | qd->qd_slot = slot; | |
1261 | qd->qd_slot_count = 1; | |
b3b94faa | 1262 | |
0a7ab79c | 1263 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1264 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1265 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1266 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1267 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1268 | |
1269 | found++; | |
1270 | } | |
1271 | ||
1272 | brelse(bh); | |
1273 | dblock++; | |
1274 | extlen--; | |
1275 | } | |
1276 | ||
1277 | if (found) | |
1278 | fs_info(sdp, "found %u quota changes\n", found); | |
1279 | ||
1280 | return 0; | |
1281 | ||
a91ea69f | 1282 | fail: |
b3b94faa DT |
1283 | gfs2_quota_cleanup(sdp); |
1284 | return error; | |
1285 | } | |
1286 | ||
b3b94faa DT |
1287 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1288 | { | |
1289 | struct list_head *head = &sdp->sd_quota_list; | |
1290 | struct gfs2_quota_data *qd; | |
1291 | unsigned int x; | |
1292 | ||
0a7ab79c | 1293 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1294 | while (!list_empty(head)) { |
1295 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1296 | ||
0a7ab79c AD |
1297 | if (atomic_read(&qd->qd_count) > 1 || |
1298 | (atomic_read(&qd->qd_count) && | |
1299 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1300 | list_move(&qd->qd_list, head); |
1301 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1302 | schedule(); |
0a7ab79c | 1303 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1304 | continue; |
1305 | } | |
1306 | ||
1307 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1308 | /* Also remove if this qd exists in the reclaim list */ |
1309 | if (!list_empty(&qd->qd_reclaim)) { | |
1310 | list_del_init(&qd->qd_reclaim); | |
1311 | atomic_dec(&qd_lru_count); | |
1312 | } | |
b3b94faa | 1313 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1314 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1315 | |
0a7ab79c | 1316 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1317 | gfs2_assert_warn(sdp, !qd->qd_change); |
1318 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1319 | } else | |
1320 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1321 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1322 | ||
f057f6cd | 1323 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1324 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1325 | |
0a7ab79c | 1326 | spin_lock(&qd_lru_lock); |
b3b94faa | 1327 | } |
0a7ab79c | 1328 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1329 | |
1330 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1331 | ||
1332 | if (sdp->sd_quota_bitmap) { | |
1333 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1334 | kfree(sdp->sd_quota_bitmap[x]); | |
1335 | kfree(sdp->sd_quota_bitmap); | |
1336 | } | |
1337 | } | |
1338 | ||
37b2c837 SW |
1339 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1340 | { | |
1341 | if (error == 0 || error == -EROFS) | |
1342 | return; | |
1343 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1344 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1345 | } | |
1346 | ||
1347 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1348 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1349 | unsigned long t, unsigned long *timeo, |
1350 | unsigned int *new_timeo) | |
1351 | { | |
1352 | if (t >= *timeo) { | |
8c42d637 | 1353 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1354 | quotad_error(sdp, msg, error); |
1355 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1356 | } else { | |
1357 | *timeo -= t; | |
1358 | } | |
1359 | } | |
1360 | ||
813e0c46 SW |
1361 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1362 | { | |
1363 | struct gfs2_inode *ip; | |
1364 | ||
1365 | while(1) { | |
1366 | ip = NULL; | |
1367 | spin_lock(&sdp->sd_trunc_lock); | |
1368 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1369 | ip = list_entry(sdp->sd_trunc_list.next, | |
1370 | struct gfs2_inode, i_trunc_list); | |
1371 | list_del_init(&ip->i_trunc_list); | |
1372 | } | |
1373 | spin_unlock(&sdp->sd_trunc_lock); | |
1374 | if (ip == NULL) | |
1375 | return; | |
1376 | gfs2_glock_finish_truncate(ip); | |
1377 | } | |
1378 | } | |
1379 | ||
3d3c10f2 BM |
1380 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1381 | if (!sdp->sd_statfs_force_sync) { | |
1382 | sdp->sd_statfs_force_sync = 1; | |
1383 | wake_up(&sdp->sd_quota_wait); | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | ||
37b2c837 SW |
1388 | /** |
1389 | * gfs2_quotad - Write cached quota changes into the quota file | |
1390 | * @sdp: Pointer to GFS2 superblock | |
1391 | * | |
1392 | */ | |
1393 | ||
1394 | int gfs2_quotad(void *data) | |
1395 | { | |
1396 | struct gfs2_sbd *sdp = data; | |
1397 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1398 | unsigned long statfs_timeo = 0; | |
1399 | unsigned long quotad_timeo = 0; | |
1400 | unsigned long t = 0; | |
1401 | DEFINE_WAIT(wait); | |
813e0c46 | 1402 | int empty; |
37b2c837 SW |
1403 | |
1404 | while (!kthread_should_stop()) { | |
1405 | ||
1406 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1407 | if (sdp->sd_statfs_force_sync) { |
1408 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1409 | quotad_error(sdp, "statfs", error); | |
1410 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1411 | } | |
1412 | else | |
1413 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1414 | &statfs_timeo, | |
1415 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1416 | |
1417 | /* Update quota file */ | |
5fb324ad | 1418 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t, |
37b2c837 SW |
1419 | "ad_timeo, &tune->gt_quota_quantum); |
1420 | ||
813e0c46 SW |
1421 | /* Check for & recover partially truncated inodes */ |
1422 | quotad_check_trunc_list(sdp); | |
1423 | ||
a0acae0e TH |
1424 | try_to_freeze(); |
1425 | ||
37b2c837 SW |
1426 | t = min(quotad_timeo, statfs_timeo); |
1427 | ||
7fa5d20d | 1428 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1429 | spin_lock(&sdp->sd_trunc_lock); |
1430 | empty = list_empty(&sdp->sd_trunc_list); | |
1431 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1432 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1433 | t -= schedule_timeout(t); |
1434 | else | |
1435 | t = 0; | |
37b2c837 SW |
1436 | finish_wait(&sdp->sd_quota_wait, &wait); |
1437 | } | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | ||
1d371b5e SW |
1442 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1443 | struct fs_quota_stat *fqs) | |
1444 | { | |
1445 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1446 | ||
1447 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1448 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1449 | |
1450 | switch (sdp->sd_args.ar_quota) { | |
1451 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1452 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1453 | /*FALLTHRU*/ |
1454 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1455 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1456 | break; |
1457 | case GFS2_QUOTA_OFF: | |
1458 | break; | |
1459 | } | |
1460 | ||
1d371b5e SW |
1461 | if (sdp->sd_quota_inode) { |
1462 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1463 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1464 | } | |
1465 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1466 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1467 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1468 | return 0; | |
1469 | } | |
1470 | ||
74a8a103 | 1471 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1472 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1473 | { |
1474 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1475 | struct gfs2_quota_lvb *qlvb; | |
1476 | struct gfs2_quota_data *qd; | |
1477 | struct gfs2_holder q_gh; | |
1478 | int error; | |
74a8a103 | 1479 | int type; |
113d6b3c SW |
1480 | |
1481 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1482 | ||
1483 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1484 | return -ESRCH; /* Crazy XFS error code */ | |
1485 | ||
74a8a103 | 1486 | if (qid.type == USRQUOTA) |
113d6b3c | 1487 | type = QUOTA_USER; |
74a8a103 | 1488 | else if (qid.type == GRPQUOTA) |
113d6b3c SW |
1489 | type = QUOTA_GROUP; |
1490 | else | |
1491 | return -EINVAL; | |
1492 | ||
05e0a60d | 1493 | error = qd_get(sdp, qid, &qd); |
113d6b3c SW |
1494 | if (error) |
1495 | return error; | |
1496 | error = do_glock(qd, FORCE, &q_gh); | |
1497 | if (error) | |
1498 | goto out; | |
1499 | ||
4e2f8849 | 1500 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1501 | fdq->d_version = FS_DQUOT_VERSION; |
ade7ce31 | 1502 | fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
558e8528 | 1503 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
14870b45 AD |
1504 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1505 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1506 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1507 | |
1508 | gfs2_glock_dq_uninit(&q_gh); | |
1509 | out: | |
1510 | qd_put(qd); | |
1511 | return error; | |
1512 | } | |
1513 | ||
e285c100 | 1514 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1515 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1516 | |
74a8a103 | 1517 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1518 | struct fs_disk_quota *fdq) |
e285c100 SW |
1519 | { |
1520 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1521 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1522 | struct gfs2_quota_data *qd; | |
1523 | struct gfs2_holder q_gh, i_gh; | |
1524 | unsigned int data_blocks, ind_blocks; | |
1525 | unsigned int blocks = 0; | |
1526 | int alloc_required; | |
e285c100 SW |
1527 | loff_t offset; |
1528 | int error; | |
74a8a103 | 1529 | int type; |
e285c100 SW |
1530 | |
1531 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1532 | return -ESRCH; /* Crazy XFS error code */ | |
1533 | ||
74a8a103 | 1534 | switch(qid.type) { |
e285c100 SW |
1535 | case USRQUOTA: |
1536 | type = QUOTA_USER; | |
e285c100 SW |
1537 | break; |
1538 | case GRPQUOTA: | |
1539 | type = QUOTA_GROUP; | |
e285c100 SW |
1540 | break; |
1541 | default: | |
1542 | return -EINVAL; | |
1543 | } | |
1544 | ||
1545 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1546 | return -EINVAL; | |
e285c100 | 1547 | |
05e0a60d | 1548 | error = qd_get(sdp, qid, &qd); |
e285c100 SW |
1549 | if (error) |
1550 | return error; | |
1551 | ||
0a305e49 BP |
1552 | error = gfs2_rs_alloc(ip); |
1553 | if (error) | |
1554 | goto out_put; | |
1555 | ||
e285c100 SW |
1556 | mutex_lock(&ip->i_inode.i_mutex); |
1557 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1558 | if (error) | |
0a305e49 | 1559 | goto out_unlockput; |
e285c100 SW |
1560 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1561 | if (error) | |
1562 | goto out_q; | |
1563 | ||
1564 | /* Check for existing entry, if none then alloc new blocks */ | |
1565 | error = update_qd(sdp, qd); | |
1566 | if (error) | |
1567 | goto out_i; | |
1568 | ||
1569 | /* If nothing has changed, this is a no-op */ | |
1570 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1571 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1572 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1573 | |
e285c100 | 1574 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1575 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1576 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1577 | |
1578 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1579 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1580 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1581 | ||
e285c100 SW |
1582 | if (fdq->d_fieldmask == 0) |
1583 | goto out_i; | |
1584 | ||
1585 | offset = qd2offset(qd); | |
461cb419 | 1586 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1587 | if (gfs2_is_stuffed(ip)) |
1588 | alloc_required = 1; | |
e285c100 | 1589 | if (alloc_required) { |
e285c100 SW |
1590 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1591 | &data_blocks, &ind_blocks); | |
564e12b1 | 1592 | blocks = 1 + data_blocks + ind_blocks; |
9dbe9610 | 1593 | error = gfs2_inplace_reserve(ip, blocks, 0); |
e285c100 | 1594 | if (error) |
564e12b1 | 1595 | goto out_i; |
71f890f7 | 1596 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1597 | } |
1598 | ||
e79a46a0 AD |
1599 | /* Some quotas span block boundaries and can update two blocks, |
1600 | adding an extra block to the transaction to handle such quotas */ | |
1601 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1602 | if (error) |
1603 | goto out_release; | |
1604 | ||
1605 | /* Apply changes */ | |
1606 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1607 | ||
1608 | gfs2_trans_end(sdp); | |
1609 | out_release: | |
564e12b1 | 1610 | if (alloc_required) |
e285c100 | 1611 | gfs2_inplace_release(ip); |
e285c100 SW |
1612 | out_i: |
1613 | gfs2_glock_dq_uninit(&i_gh); | |
1614 | out_q: | |
1615 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1616 | out_unlockput: |
e285c100 | 1617 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1618 | out_put: |
e285c100 SW |
1619 | qd_put(qd); |
1620 | return error; | |
1621 | } | |
1622 | ||
cc632e7f SW |
1623 | const struct quotactl_ops gfs2_quotactl_ops = { |
1624 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1625 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1626 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1627 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1628 | }; |