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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_... */ | |
74 | u32 qc_id; | |
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 | ||
cd915493 | 123 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 124 | { |
cd915493 | 125 | u64 offset; |
b3b94faa | 126 | |
cd915493 | 127 | offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags); |
b3b94faa DT |
128 | offset *= sizeof(struct gfs2_quota); |
129 | ||
130 | return offset; | |
131 | } | |
132 | ||
cd915493 | 133 | static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
134 | struct gfs2_quota_data **qdp) |
135 | { | |
136 | struct gfs2_quota_data *qd; | |
137 | int error; | |
138 | ||
37b2c837 | 139 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
140 | if (!qd) |
141 | return -ENOMEM; | |
142 | ||
0a7ab79c | 143 | atomic_set(&qd->qd_count, 1); |
b3b94faa DT |
144 | qd->qd_id = id; |
145 | if (user) | |
146 | set_bit(QDF_USER, &qd->qd_flags); | |
147 | qd->qd_slot = -1; | |
0a7ab79c | 148 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 149 | |
cd915493 | 150 | error = gfs2_glock_get(sdp, 2 * (u64)id + !user, |
b3b94faa DT |
151 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
152 | if (error) | |
153 | goto fail; | |
154 | ||
b3b94faa DT |
155 | *qdp = qd; |
156 | ||
157 | return 0; | |
158 | ||
a91ea69f | 159 | fail: |
37b2c837 | 160 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
161 | return error; |
162 | } | |
163 | ||
6a6ada81 | 164 | static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
165 | struct gfs2_quota_data **qdp) |
166 | { | |
167 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
168 | int error, found; | |
169 | ||
170 | *qdp = NULL; | |
171 | ||
172 | for (;;) { | |
173 | found = 0; | |
0a7ab79c | 174 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
175 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
176 | if (qd->qd_id == id && | |
177 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { | |
0a7ab79c AD |
178 | if (!atomic_read(&qd->qd_count) && |
179 | !list_empty(&qd->qd_reclaim)) { | |
180 | /* Remove it from reclaim list */ | |
181 | list_del_init(&qd->qd_reclaim); | |
182 | atomic_dec(&qd_lru_count); | |
183 | } | |
184 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
185 | found = 1; |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
190 | if (!found) | |
191 | qd = NULL; | |
192 | ||
193 | if (!qd && new_qd) { | |
194 | qd = new_qd; | |
195 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
196 | atomic_inc(&sdp->sd_quota_count); | |
197 | new_qd = NULL; | |
198 | } | |
199 | ||
0a7ab79c | 200 | spin_unlock(&qd_lru_lock); |
b3b94faa | 201 | |
6a6ada81 | 202 | if (qd) { |
b3b94faa | 203 | if (new_qd) { |
f057f6cd | 204 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 205 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
206 | } |
207 | *qdp = qd; | |
208 | return 0; | |
209 | } | |
210 | ||
211 | error = qd_alloc(sdp, user, id, &new_qd); | |
212 | if (error) | |
213 | return error; | |
214 | } | |
215 | } | |
216 | ||
217 | static void qd_hold(struct gfs2_quota_data *qd) | |
218 | { | |
219 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
0a7ab79c AD |
220 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
221 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
222 | } |
223 | ||
224 | static void qd_put(struct gfs2_quota_data *qd) | |
225 | { | |
0a7ab79c AD |
226 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
227 | /* Add to the reclaim list */ | |
228 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
229 | atomic_inc(&qd_lru_count); | |
230 | spin_unlock(&qd_lru_lock); | |
231 | } | |
b3b94faa DT |
232 | } |
233 | ||
234 | static int slot_get(struct gfs2_quota_data *qd) | |
235 | { | |
236 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
237 | unsigned int c, o = 0, b; | |
238 | unsigned char byte = 0; | |
239 | ||
22077f57 | 240 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
241 | |
242 | if (qd->qd_slot_count++) { | |
22077f57 | 243 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
244 | return 0; |
245 | } | |
246 | ||
247 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
248 | for (o = 0; o < PAGE_SIZE; o++) { | |
249 | byte = sdp->sd_quota_bitmap[c][o]; | |
250 | if (byte != 0xFF) | |
251 | goto found; | |
252 | } | |
253 | ||
254 | goto fail; | |
255 | ||
a91ea69f | 256 | found: |
b3b94faa DT |
257 | for (b = 0; b < 8; b++) |
258 | if (!(byte & (1 << b))) | |
259 | break; | |
260 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
261 | ||
262 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
263 | goto fail; | |
264 | ||
265 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
266 | ||
22077f57 | 267 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
268 | |
269 | return 0; | |
270 | ||
a91ea69f | 271 | fail: |
b3b94faa | 272 | qd->qd_slot_count--; |
22077f57 | 273 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
274 | return -ENOSPC; |
275 | } | |
276 | ||
277 | static void slot_hold(struct gfs2_quota_data *qd) | |
278 | { | |
279 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
280 | ||
22077f57 | 281 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
282 | gfs2_assert(sdp, qd->qd_slot_count); |
283 | qd->qd_slot_count++; | |
22077f57 | 284 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
285 | } |
286 | ||
287 | static void slot_put(struct gfs2_quota_data *qd) | |
288 | { | |
289 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
290 | ||
22077f57 | 291 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
292 | gfs2_assert(sdp, qd->qd_slot_count); |
293 | if (!--qd->qd_slot_count) { | |
294 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
295 | qd->qd_slot = -1; | |
296 | } | |
22077f57 | 297 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
298 | } |
299 | ||
300 | static int bh_get(struct gfs2_quota_data *qd) | |
301 | { | |
302 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 303 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 304 | unsigned int block, offset; |
b3b94faa DT |
305 | struct buffer_head *bh; |
306 | int error; | |
23591256 | 307 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 308 | |
f55ab26a | 309 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
310 | |
311 | if (qd->qd_bh_count++) { | |
f55ab26a | 312 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
313 | return 0; |
314 | } | |
315 | ||
316 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 317 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 318 | |
23591256 | 319 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 320 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
321 | if (error) |
322 | goto fail; | |
7276b3b0 | 323 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
324 | if (error) |
325 | goto fail; | |
326 | error = -EIO; | |
327 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
328 | goto fail_brelse; | |
329 | ||
330 | qd->qd_bh = bh; | |
331 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
332 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
333 | offset * sizeof(struct gfs2_quota_change)); | |
334 | ||
2e95b665 | 335 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
336 | |
337 | return 0; | |
338 | ||
a91ea69f | 339 | fail_brelse: |
b3b94faa | 340 | brelse(bh); |
a91ea69f | 341 | fail: |
b3b94faa | 342 | qd->qd_bh_count--; |
f55ab26a | 343 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
344 | return error; |
345 | } | |
346 | ||
347 | static void bh_put(struct gfs2_quota_data *qd) | |
348 | { | |
349 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
350 | ||
f55ab26a | 351 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
352 | gfs2_assert(sdp, qd->qd_bh_count); |
353 | if (!--qd->qd_bh_count) { | |
354 | brelse(qd->qd_bh); | |
355 | qd->qd_bh = NULL; | |
356 | qd->qd_bh_qc = NULL; | |
357 | } | |
f55ab26a | 358 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
359 | } |
360 | ||
361 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
362 | { | |
363 | struct gfs2_quota_data *qd = NULL; | |
364 | int error; | |
365 | int found = 0; | |
366 | ||
367 | *qdp = NULL; | |
368 | ||
369 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
370 | return 0; | |
371 | ||
0a7ab79c | 372 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
373 | |
374 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
375 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
376 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
377 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
378 | continue; | |
379 | ||
380 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
381 | ||
382 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
383 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
384 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
385 | qd->qd_change_sync = qd->qd_change; |
386 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
387 | qd->qd_slot_count++; | |
388 | found = 1; | |
389 | ||
390 | break; | |
391 | } | |
392 | ||
393 | if (!found) | |
394 | qd = NULL; | |
395 | ||
0a7ab79c | 396 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
397 | |
398 | if (qd) { | |
399 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
400 | error = bh_get(qd); | |
401 | if (error) { | |
402 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
403 | slot_put(qd); | |
404 | qd_put(qd); | |
405 | return error; | |
406 | } | |
407 | } | |
408 | ||
409 | *qdp = qd; | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
414 | static int qd_trylock(struct gfs2_quota_data *qd) | |
415 | { | |
416 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
417 | ||
418 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
419 | return 0; | |
420 | ||
0a7ab79c | 421 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
422 | |
423 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
424 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 425 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
426 | return 0; |
427 | } | |
428 | ||
429 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
430 | ||
431 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
432 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
433 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
434 | qd->qd_change_sync = qd->qd_change; |
435 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
436 | qd->qd_slot_count++; | |
437 | ||
0a7ab79c | 438 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
439 | |
440 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
441 | if (bh_get(qd)) { | |
442 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
443 | slot_put(qd); | |
444 | qd_put(qd); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | return 1; | |
449 | } | |
450 | ||
451 | static void qd_unlock(struct gfs2_quota_data *qd) | |
452 | { | |
568f4c96 SW |
453 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
454 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
455 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
456 | bh_put(qd); | |
457 | slot_put(qd); | |
458 | qd_put(qd); | |
459 | } | |
460 | ||
33a82529 | 461 | static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
462 | struct gfs2_quota_data **qdp) |
463 | { | |
464 | int error; | |
465 | ||
6a6ada81 | 466 | error = qd_get(sdp, user, id, qdp); |
b3b94faa DT |
467 | if (error) |
468 | return error; | |
469 | ||
470 | error = slot_get(*qdp); | |
471 | if (error) | |
472 | goto fail; | |
473 | ||
474 | error = bh_get(*qdp); | |
475 | if (error) | |
476 | goto fail_slot; | |
477 | ||
478 | return 0; | |
479 | ||
a91ea69f | 480 | fail_slot: |
b3b94faa | 481 | slot_put(*qdp); |
a91ea69f | 482 | fail: |
b3b94faa DT |
483 | qd_put(*qdp); |
484 | return error; | |
485 | } | |
486 | ||
487 | static void qdsb_put(struct gfs2_quota_data *qd) | |
488 | { | |
489 | bh_put(qd); | |
490 | slot_put(qd); | |
491 | qd_put(qd); | |
492 | } | |
493 | ||
cd915493 | 494 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 495 | { |
feaa7bba | 496 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
5407e242 | 497 | struct gfs2_quota_data **qd; |
b3b94faa DT |
498 | int error; |
499 | ||
aaaf68c5 AP |
500 | if (ip->i_res == NULL) { |
501 | error = gfs2_rs_alloc(ip); | |
502 | if (error) | |
503 | return error; | |
504 | } | |
5407e242 BP |
505 | |
506 | qd = ip->i_res->rs_qa_qd; | |
507 | ||
508 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || | |
b3b94faa DT |
509 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
510 | return -EIO; | |
511 | ||
512 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
513 | return 0; | |
514 | ||
33a82529 | 515 | error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd); |
b3b94faa DT |
516 | if (error) |
517 | goto out; | |
5407e242 | 518 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
519 | qd++; |
520 | ||
33a82529 | 521 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd); |
b3b94faa DT |
522 | if (error) |
523 | goto out; | |
5407e242 | 524 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
525 | qd++; |
526 | ||
2933f925 | 527 | if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
33a82529 | 528 | error = qdsb_get(sdp, QUOTA_USER, uid, qd); |
b3b94faa DT |
529 | if (error) |
530 | goto out; | |
5407e242 | 531 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
532 | qd++; |
533 | } | |
534 | ||
2933f925 | 535 | if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
33a82529 | 536 | error = qdsb_get(sdp, QUOTA_GROUP, gid, qd); |
b3b94faa DT |
537 | if (error) |
538 | goto out; | |
5407e242 | 539 | ip->i_res->rs_qa_qd_num++; |
b3b94faa DT |
540 | qd++; |
541 | } | |
542 | ||
a91ea69f | 543 | out: |
b3b94faa DT |
544 | if (error) |
545 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
546 | return error; |
547 | } | |
548 | ||
549 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
550 | { | |
feaa7bba | 551 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
552 | unsigned int x; |
553 | ||
5407e242 BP |
554 | if (ip->i_res == NULL) |
555 | return; | |
b3b94faa DT |
556 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
557 | ||
5407e242 BP |
558 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
559 | qdsb_put(ip->i_res->rs_qa_qd[x]); | |
560 | ip->i_res->rs_qa_qd[x] = NULL; | |
b3b94faa | 561 | } |
5407e242 | 562 | ip->i_res->rs_qa_qd_num = 0; |
b3b94faa DT |
563 | } |
564 | ||
565 | static int sort_qd(const void *a, const void *b) | |
566 | { | |
48fac179 SW |
567 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
568 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa DT |
569 | |
570 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != | |
571 | !test_bit(QDF_USER, &qd_b->qd_flags)) { | |
572 | if (test_bit(QDF_USER, &qd_a->qd_flags)) | |
48fac179 | 573 | return -1; |
b3b94faa | 574 | else |
48fac179 | 575 | return 1; |
b3b94faa | 576 | } |
48fac179 SW |
577 | if (qd_a->qd_id < qd_b->qd_id) |
578 | return -1; | |
579 | if (qd_a->qd_id > qd_b->qd_id) | |
580 | return 1; | |
b3b94faa | 581 | |
48fac179 | 582 | return 0; |
b3b94faa DT |
583 | } |
584 | ||
cd915493 | 585 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
586 | { |
587 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 588 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 589 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 590 | s64 x; |
b3b94faa | 591 | |
f55ab26a | 592 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 593 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
594 | |
595 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
596 | qc->qc_change = 0; | |
597 | qc->qc_flags = 0; | |
598 | if (test_bit(QDF_USER, &qd->qd_flags)) | |
599 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); | |
600 | qc->qc_id = cpu_to_be32(qd->qd_id); | |
601 | } | |
602 | ||
b44b84d7 | 603 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
604 | qc->qc_change = cpu_to_be64(x); |
605 | ||
22077f57 | 606 | spin_lock(&qd_lru_lock); |
b3b94faa | 607 | qd->qd_change = x; |
22077f57 | 608 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
609 | |
610 | if (!x) { | |
611 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
612 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
613 | qc->qc_flags = 0; | |
614 | qc->qc_id = 0; | |
615 | slot_put(qd); | |
616 | qd_put(qd); | |
617 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
618 | qd_hold(qd); | |
619 | slot_hold(qd); | |
620 | } | |
907b9bce | 621 | |
f55ab26a | 622 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
623 | } |
624 | ||
18ec7d5c | 625 | /** |
1e72c0f7 SW |
626 | * gfs2_adjust_quota - adjust record of current block usage |
627 | * @ip: The quota inode | |
628 | * @loc: Offset of the entry in the quota file | |
e285c100 | 629 | * @change: The amount of usage change to record |
1e72c0f7 | 630 | * @qd: The quota data |
e285c100 | 631 | * @fdq: The updated limits to record |
18ec7d5c SW |
632 | * |
633 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
634 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
635 | * |
636 | * Returns: 0 or -ve on error | |
18ec7d5c | 637 | */ |
1e72c0f7 | 638 | |
18ec7d5c | 639 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
640 | s64 change, struct gfs2_quota_data *qd, |
641 | struct fs_disk_quota *fdq) | |
18ec7d5c | 642 | { |
feaa7bba | 643 | struct inode *inode = &ip->i_inode; |
14870b45 | 644 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
645 | struct address_space *mapping = inode->i_mapping; |
646 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 647 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 648 | unsigned blocksize, iblock, pos; |
ab9bbda0 | 649 | struct buffer_head *bh; |
18ec7d5c | 650 | struct page *page; |
7e619bc3 AD |
651 | void *kaddr, *ptr; |
652 | struct gfs2_quota q, *qp; | |
653 | int err, nbytes; | |
e285c100 | 654 | u64 size; |
18ec7d5c | 655 | |
891a8e93 SW |
656 | if (gfs2_is_stuffed(ip)) { |
657 | err = gfs2_unstuff_dinode(ip, NULL); | |
658 | if (err) | |
659 | return err; | |
660 | } | |
7e619bc3 AD |
661 | |
662 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
4306629e | 663 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
7e619bc3 AD |
664 | if (err < 0) |
665 | return err; | |
666 | ||
667 | err = -EIO; | |
668 | qp = &q; | |
669 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
670 | qp->qu_value += change; | |
671 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
672 | qd->qd_qb.qb_value = qp->qu_value; | |
673 | if (fdq) { | |
674 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 675 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
676 | qd->qd_qb.qb_warn = qp->qu_warn; |
677 | } | |
678 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 679 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
680 | qd->qd_qb.qb_limit = qp->qu_limit; |
681 | } | |
802ec9b6 AD |
682 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
683 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
684 | qd->qd_qb.qb_value = qp->qu_value; | |
685 | } | |
7e619bc3 AD |
686 | } |
687 | ||
688 | /* Write the quota into the quota file on disk */ | |
689 | ptr = qp; | |
690 | nbytes = sizeof(struct gfs2_quota); | |
691 | get_a_page: | |
220cca2a | 692 | page = find_or_create_page(mapping, index, GFP_NOFS); |
18ec7d5c SW |
693 | if (!page) |
694 | return -ENOMEM; | |
695 | ||
696 | blocksize = inode->i_sb->s_blocksize; | |
697 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
698 | ||
699 | if (!page_has_buffers(page)) | |
700 | create_empty_buffers(page, blocksize, 0); | |
701 | ||
702 | bh = page_buffers(page); | |
703 | pos = blocksize; | |
704 | while (offset >= pos) { | |
705 | bh = bh->b_this_page; | |
706 | iblock++; | |
707 | pos += blocksize; | |
708 | } | |
709 | ||
710 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 711 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 712 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
713 | goto unlock_out; |
714 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
715 | if (buffer_new(bh)) |
716 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
717 | } |
718 | ||
719 | if (PageUptodate(page)) | |
720 | set_buffer_uptodate(bh); | |
721 | ||
722 | if (!buffer_uptodate(bh)) { | |
20ed0535 | 723 | ll_rw_block(READ | REQ_META, 1, &bh); |
18ec7d5c SW |
724 | wait_on_buffer(bh); |
725 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 726 | goto unlock_out; |
18ec7d5c SW |
727 | } |
728 | ||
729 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
730 | ||
d9349285 | 731 | kaddr = kmap_atomic(page); |
7e619bc3 AD |
732 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
733 | nbytes = PAGE_CACHE_SIZE - offset; | |
734 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c | 735 | flush_dcache_page(page); |
d9349285 | 736 | kunmap_atomic(kaddr); |
7e619bc3 AD |
737 | unlock_page(page); |
738 | page_cache_release(page); | |
739 | ||
740 | /* If quota straddles page boundary, we need to update the rest of the | |
741 | * quota at the beginning of the next page */ | |
8b421601 | 742 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
743 | ptr = ptr + nbytes; |
744 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
745 | offset = 0; | |
746 | index++; | |
747 | goto get_a_page; | |
748 | } | |
e285c100 | 749 | |
e285c100 | 750 | size = loc + sizeof(struct gfs2_quota); |
a2e0f799 | 751 | if (size > inode->i_size) |
e285c100 | 752 | i_size_write(inode, size); |
e285c100 | 753 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
e285c100 | 754 | mark_inode_dirty(inode); |
500242ac | 755 | return 0; |
ab9bbda0 | 756 | |
7e619bc3 | 757 | unlock_out: |
18ec7d5c SW |
758 | unlock_page(page); |
759 | page_cache_release(page); | |
760 | return err; | |
761 | } | |
762 | ||
b3b94faa DT |
763 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
764 | { | |
765 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 766 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
767 | unsigned int data_blocks, ind_blocks; |
768 | struct gfs2_holder *ghs, i_gh; | |
769 | unsigned int qx, x; | |
770 | struct gfs2_quota_data *qd; | |
71f890f7 | 771 | unsigned reserved; |
f42faf4f | 772 | loff_t offset; |
20b95bf2 | 773 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
774 | int error; |
775 | ||
0a305e49 BP |
776 | error = gfs2_rs_alloc(ip); |
777 | if (error) | |
778 | return error; | |
779 | ||
b3b94faa DT |
780 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
781 | &data_blocks, &ind_blocks); | |
782 | ||
16c5f06f | 783 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
784 | if (!ghs) |
785 | return -ENOMEM; | |
786 | ||
787 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
56aa72d0 | 788 | mutex_lock(&ip->i_inode.i_mutex); |
b3b94faa | 789 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 790 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
791 | GL_NOCACHE, &ghs[qx]); |
792 | if (error) | |
793 | goto out; | |
794 | } | |
795 | ||
796 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
797 | if (error) | |
798 | goto out; | |
799 | ||
800 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 801 | offset = qd2offset(qda[x]); |
461cb419 BP |
802 | if (gfs2_write_alloc_required(ip, offset, |
803 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
804 | nalloc++; |
805 | } | |
806 | ||
20b95bf2 AD |
807 | /* |
808 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
809 | * block to the reservation unconditionally. If the inode | |
810 | * doesn't need unstuffing, the block will be released to the | |
811 | * rgrp since it won't be allocated during the transaction | |
812 | */ | |
7e619bc3 AD |
813 | /* +3 in the end for unstuffing block, inode size update block |
814 | * and another block in case quota straddles page boundary and | |
815 | * two blocks need to be updated instead of 1 */ | |
816 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 817 | |
71f890f7 | 818 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
9dbe9610 | 819 | error = gfs2_inplace_reserve(ip, reserved, 0); |
20b95bf2 AD |
820 | if (error) |
821 | goto out_alloc; | |
b3b94faa | 822 | |
20b95bf2 | 823 | if (nalloc) |
71f890f7 | 824 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
825 | |
826 | error = gfs2_trans_begin(sdp, blocks, 0); | |
827 | if (error) | |
828 | goto out_ipres; | |
b3b94faa DT |
829 | |
830 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
831 | qd = qda[x]; |
832 | offset = qd2offset(qd); | |
e285c100 | 833 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 834 | if (error) |
b3b94faa | 835 | goto out_end_trans; |
b3b94faa DT |
836 | |
837 | do_qc(qd, -qd->qd_change_sync); | |
662e3a55 | 838 | set_bit(QDF_REFRESH, &qd->qd_flags); |
b3b94faa DT |
839 | } |
840 | ||
841 | error = 0; | |
842 | ||
a91ea69f | 843 | out_end_trans: |
b3b94faa | 844 | gfs2_trans_end(sdp); |
a91ea69f | 845 | out_ipres: |
20b95bf2 | 846 | gfs2_inplace_release(ip); |
a91ea69f | 847 | out_alloc: |
b3b94faa | 848 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 849 | out: |
b3b94faa DT |
850 | while (qx--) |
851 | gfs2_glock_dq_uninit(&ghs[qx]); | |
e285c100 | 852 | mutex_unlock(&ip->i_inode.i_mutex); |
b3b94faa | 853 | kfree(ghs); |
b09e593d | 854 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
855 | return error; |
856 | } | |
857 | ||
e285c100 SW |
858 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
859 | { | |
860 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
861 | struct gfs2_quota q; | |
862 | struct gfs2_quota_lvb *qlvb; | |
863 | loff_t pos; | |
864 | int error; | |
865 | ||
866 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
867 | pos = qd2offset(qd); | |
4306629e | 868 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
e285c100 SW |
869 | if (error < 0) |
870 | return error; | |
871 | ||
4e2f8849 | 872 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
e285c100 SW |
873 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
874 | qlvb->__pad = 0; | |
875 | qlvb->qb_limit = q.qu_limit; | |
876 | qlvb->qb_warn = q.qu_warn; | |
877 | qlvb->qb_value = q.qu_value; | |
878 | qd->qd_qb = *qlvb; | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
b3b94faa DT |
883 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
884 | struct gfs2_holder *q_gh) | |
885 | { | |
886 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 887 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 888 | struct gfs2_holder i_gh; |
b3b94faa DT |
889 | int error; |
890 | ||
a91ea69f | 891 | restart: |
b3b94faa DT |
892 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
893 | if (error) | |
894 | return error; | |
895 | ||
4e2f8849 | 896 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
b3b94faa | 897 | |
e9fc2aa0 | 898 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
b3b94faa | 899 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
900 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
901 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
902 | if (error) |
903 | return error; | |
904 | ||
e9fc2aa0 | 905 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
906 | if (error) |
907 | goto fail; | |
908 | ||
e285c100 SW |
909 | error = update_qd(sdp, qd); |
910 | if (error) | |
1e72c0f7 | 911 | goto fail_gunlock; |
b3b94faa | 912 | |
e285c100 | 913 | gfs2_glock_dq_uninit(&i_gh); |
91094d0f SW |
914 | gfs2_glock_dq_uninit(q_gh); |
915 | force_refresh = 0; | |
916 | goto restart; | |
b3b94faa DT |
917 | } |
918 | ||
919 | return 0; | |
920 | ||
a91ea69f | 921 | fail_gunlock: |
b3b94faa | 922 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 923 | fail: |
b3b94faa | 924 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
925 | return error; |
926 | } | |
927 | ||
cd915493 | 928 | int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 929 | { |
feaa7bba | 930 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
662e3a55 | 931 | struct gfs2_quota_data *qd; |
b3b94faa DT |
932 | unsigned int x; |
933 | int error = 0; | |
934 | ||
891a8e93 SW |
935 | error = gfs2_quota_hold(ip, uid, gid); |
936 | if (error) | |
937 | return error; | |
b3b94faa DT |
938 | |
939 | if (capable(CAP_SYS_RESOURCE) || | |
940 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
941 | return 0; | |
942 | ||
5407e242 BP |
943 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
944 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
b3b94faa | 945 | |
5407e242 | 946 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
662e3a55 | 947 | int force = NO_FORCE; |
5407e242 | 948 | qd = ip->i_res->rs_qa_qd[x]; |
662e3a55 AD |
949 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
950 | force = FORCE; | |
5407e242 | 951 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
952 | if (error) |
953 | break; | |
954 | } | |
955 | ||
956 | if (!error) | |
957 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
958 | else { | |
959 | while (x--) | |
5407e242 | 960 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
961 | gfs2_quota_unhold(ip); |
962 | } | |
963 | ||
964 | return error; | |
965 | } | |
966 | ||
967 | static int need_sync(struct gfs2_quota_data *qd) | |
968 | { | |
969 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
970 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 971 | s64 value; |
b3b94faa DT |
972 | unsigned int num, den; |
973 | int do_sync = 1; | |
974 | ||
975 | if (!qd->qd_qb.qb_limit) | |
976 | return 0; | |
977 | ||
22077f57 | 978 | spin_lock(&qd_lru_lock); |
b3b94faa | 979 | value = qd->qd_change; |
22077f57 | 980 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
981 | |
982 | spin_lock(>->gt_spin); | |
983 | num = gt->gt_quota_scale_num; | |
984 | den = gt->gt_quota_scale_den; | |
985 | spin_unlock(>->gt_spin); | |
986 | ||
987 | if (value < 0) | |
988 | do_sync = 0; | |
e9fc2aa0 SW |
989 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
990 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
991 | do_sync = 0; |
992 | else { | |
993 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 994 | value = div_s64(value, den); |
e9fc2aa0 | 995 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 996 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
997 | do_sync = 0; |
998 | } | |
999 | ||
1000 | return do_sync; | |
1001 | } | |
1002 | ||
1003 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
1004 | { | |
b3b94faa DT |
1005 | struct gfs2_quota_data *qda[4]; |
1006 | unsigned int count = 0; | |
1007 | unsigned int x; | |
1008 | ||
1009 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1010 | goto out; | |
1011 | ||
5407e242 | 1012 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
b3b94faa DT |
1013 | struct gfs2_quota_data *qd; |
1014 | int sync; | |
1015 | ||
5407e242 | 1016 | qd = ip->i_res->rs_qa_qd[x]; |
b3b94faa DT |
1017 | sync = need_sync(qd); |
1018 | ||
5407e242 | 1019 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
b3b94faa DT |
1020 | |
1021 | if (sync && qd_trylock(qd)) | |
1022 | qda[count++] = qd; | |
1023 | } | |
1024 | ||
1025 | if (count) { | |
1026 | do_sync(count, qda); | |
1027 | for (x = 0; x < count; x++) | |
1028 | qd_unlock(qda[x]); | |
1029 | } | |
1030 | ||
a91ea69f | 1031 | out: |
b3b94faa DT |
1032 | gfs2_quota_unhold(ip); |
1033 | } | |
1034 | ||
1035 | #define MAX_LINE 256 | |
1036 | ||
1037 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1038 | { | |
1039 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1040 | |
2ec46505 | 1041 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 SW |
1042 | sdp->sd_fsname, type, |
1043 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", | |
1044 | qd->qd_id); | |
b3b94faa DT |
1045 | |
1046 | return 0; | |
1047 | } | |
1048 | ||
cd915493 | 1049 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 1050 | { |
feaa7bba | 1051 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1052 | struct gfs2_quota_data *qd; |
cd915493 | 1053 | s64 value; |
b3b94faa DT |
1054 | unsigned int x; |
1055 | int error = 0; | |
1056 | ||
1057 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1058 | return 0; | |
1059 | ||
1060 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1061 | return 0; | |
1062 | ||
5407e242 BP |
1063 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1064 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa DT |
1065 | |
1066 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1067 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) | |
1068 | continue; | |
1069 | ||
e9fc2aa0 | 1070 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1071 | spin_lock(&qd_lru_lock); |
b3b94faa | 1072 | value += qd->qd_change; |
22077f57 | 1073 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1074 | |
cd915493 | 1075 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1076 | print_message(qd, "exceeded"); |
431f1974 EB |
1077 | quota_send_warning(make_kqid(&init_user_ns, |
1078 | test_bit(QDF_USER, &qd->qd_flags) ? | |
1079 | USRQUOTA : GRPQUOTA, | |
1080 | qd->qd_id), | |
2ec46505 SW |
1081 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
1082 | ||
b3b94faa DT |
1083 | error = -EDQUOT; |
1084 | break; | |
e9fc2aa0 | 1085 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1086 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1087 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1088 | gfs2_tune_get(sdp, |
1089 | gt_quota_warn_period) * HZ)) { | |
431f1974 EB |
1090 | quota_send_warning(make_kqid(&init_user_ns, |
1091 | test_bit(QDF_USER, &qd->qd_flags) ? | |
1092 | USRQUOTA : GRPQUOTA, | |
1093 | qd->qd_id), | |
2ec46505 | 1094 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
b3b94faa DT |
1095 | error = print_message(qd, "warning"); |
1096 | qd->qd_last_warn = jiffies; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | return error; | |
1101 | } | |
1102 | ||
cd915493 SW |
1103 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1104 | u32 uid, u32 gid) | |
b3b94faa | 1105 | { |
b3b94faa DT |
1106 | struct gfs2_quota_data *qd; |
1107 | unsigned int x; | |
b3b94faa | 1108 | |
feaa7bba | 1109 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1110 | return; |
383f01fb | 1111 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1112 | return; |
1113 | ||
5407e242 BP |
1114 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
1115 | qd = ip->i_res->rs_qa_qd[x]; | |
b3b94faa DT |
1116 | |
1117 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1118 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { | |
1119 | do_qc(qd, change); | |
b3b94faa DT |
1120 | } |
1121 | } | |
1122 | } | |
1123 | ||
ceed1723 | 1124 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1125 | { |
8c42d637 | 1126 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
1127 | struct gfs2_quota_data **qda; |
1128 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1129 | unsigned int num_qd; | |
1130 | unsigned int x; | |
1131 | int error = 0; | |
1132 | ||
1133 | sdp->sd_quota_sync_gen++; | |
1134 | ||
1135 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1136 | if (!qda) | |
1137 | return -ENOMEM; | |
1138 | ||
1139 | do { | |
1140 | num_qd = 0; | |
1141 | ||
1142 | for (;;) { | |
1143 | error = qd_fish(sdp, qda + num_qd); | |
1144 | if (error || !qda[num_qd]) | |
1145 | break; | |
1146 | if (++num_qd == max_qd) | |
1147 | break; | |
1148 | } | |
1149 | ||
1150 | if (num_qd) { | |
1151 | if (!error) | |
1152 | error = do_sync(num_qd, qda); | |
1153 | if (!error) | |
1154 | for (x = 0; x < num_qd; x++) | |
1155 | qda[x]->qd_sync_gen = | |
1156 | sdp->sd_quota_sync_gen; | |
1157 | ||
1158 | for (x = 0; x < num_qd; x++) | |
1159 | qd_unlock(qda[x]); | |
1160 | } | |
1161 | } while (!error && num_qd == max_qd); | |
1162 | ||
1163 | kfree(qda); | |
1164 | ||
1165 | return error; | |
1166 | } | |
1167 | ||
5fb324ad CH |
1168 | static int gfs2_quota_sync_timeo(struct super_block *sb, int type) |
1169 | { | |
ceed1723 | 1170 | return gfs2_quota_sync(sb, type); |
5fb324ad CH |
1171 | } |
1172 | ||
cd915493 | 1173 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) |
b3b94faa DT |
1174 | { |
1175 | struct gfs2_quota_data *qd; | |
1176 | struct gfs2_holder q_gh; | |
1177 | int error; | |
1178 | ||
6a6ada81 | 1179 | error = qd_get(sdp, user, id, &qd); |
b3b94faa DT |
1180 | if (error) |
1181 | return error; | |
1182 | ||
1183 | error = do_glock(qd, FORCE, &q_gh); | |
1184 | if (!error) | |
1185 | gfs2_glock_dq_uninit(&q_gh); | |
1186 | ||
1187 | qd_put(qd); | |
b3b94faa DT |
1188 | return error; |
1189 | } | |
1190 | ||
bb8d8a6f SW |
1191 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1192 | { | |
1193 | const struct gfs2_quota_change *str = buf; | |
1194 | ||
1195 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1196 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
1197 | qc->qc_id = be32_to_cpu(str->qc_id); | |
1198 | } | |
1199 | ||
b3b94faa DT |
1200 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1201 | { | |
feaa7bba | 1202 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1203 | u64 size = i_size_read(sdp->sd_qc_inode); |
1204 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1205 | unsigned int x, slot = 0; |
1206 | unsigned int found = 0; | |
cd915493 SW |
1207 | u64 dblock; |
1208 | u32 extlen = 0; | |
b3b94faa DT |
1209 | int error; |
1210 | ||
a2e0f799 | 1211 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1212 | return -EIO; |
a2e0f799 | 1213 | |
b3b94faa | 1214 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
5c676f6d | 1215 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1216 | |
1217 | error = -ENOMEM; | |
1218 | ||
1219 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1220 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1221 | if (!sdp->sd_quota_bitmap) |
1222 | return error; | |
1223 | ||
1224 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1225 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1226 | if (!sdp->sd_quota_bitmap[x]) |
1227 | goto fail; | |
1228 | } | |
1229 | ||
1230 | for (x = 0; x < blocks; x++) { | |
1231 | struct buffer_head *bh; | |
1232 | unsigned int y; | |
1233 | ||
1234 | if (!extlen) { | |
1235 | int new = 0; | |
feaa7bba | 1236 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1237 | if (error) |
1238 | goto fail; | |
1239 | } | |
b3b94faa | 1240 | error = -EIO; |
7276b3b0 SW |
1241 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1242 | if (!bh) | |
1243 | goto fail; | |
b3b94faa DT |
1244 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1245 | brelse(bh); | |
1246 | goto fail; | |
1247 | } | |
1248 | ||
7276b3b0 | 1249 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1250 | y++, slot++) { |
b62f963e | 1251 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1252 | struct gfs2_quota_data *qd; |
1253 | ||
1254 | gfs2_quota_change_in(&qc, bh->b_data + | |
1255 | sizeof(struct gfs2_meta_header) + | |
1256 | y * sizeof(struct gfs2_quota_change)); | |
1257 | if (!qc.qc_change) | |
1258 | continue; | |
1259 | ||
1260 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), | |
1261 | qc.qc_id, &qd); | |
1262 | if (error) { | |
1263 | brelse(bh); | |
1264 | goto fail; | |
1265 | } | |
1266 | ||
1267 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1268 | qd->qd_change = qc.qc_change; | |
1269 | qd->qd_slot = slot; | |
1270 | qd->qd_slot_count = 1; | |
b3b94faa | 1271 | |
0a7ab79c | 1272 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1273 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1274 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1275 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1276 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1277 | |
1278 | found++; | |
1279 | } | |
1280 | ||
1281 | brelse(bh); | |
1282 | dblock++; | |
1283 | extlen--; | |
1284 | } | |
1285 | ||
1286 | if (found) | |
1287 | fs_info(sdp, "found %u quota changes\n", found); | |
1288 | ||
1289 | return 0; | |
1290 | ||
a91ea69f | 1291 | fail: |
b3b94faa DT |
1292 | gfs2_quota_cleanup(sdp); |
1293 | return error; | |
1294 | } | |
1295 | ||
b3b94faa DT |
1296 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1297 | { | |
1298 | struct list_head *head = &sdp->sd_quota_list; | |
1299 | struct gfs2_quota_data *qd; | |
1300 | unsigned int x; | |
1301 | ||
0a7ab79c | 1302 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1303 | while (!list_empty(head)) { |
1304 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1305 | ||
0a7ab79c AD |
1306 | if (atomic_read(&qd->qd_count) > 1 || |
1307 | (atomic_read(&qd->qd_count) && | |
1308 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1309 | list_move(&qd->qd_list, head); |
1310 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1311 | schedule(); |
0a7ab79c | 1312 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1313 | continue; |
1314 | } | |
1315 | ||
1316 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1317 | /* Also remove if this qd exists in the reclaim list */ |
1318 | if (!list_empty(&qd->qd_reclaim)) { | |
1319 | list_del_init(&qd->qd_reclaim); | |
1320 | atomic_dec(&qd_lru_count); | |
1321 | } | |
b3b94faa | 1322 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1323 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1324 | |
0a7ab79c | 1325 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1326 | gfs2_assert_warn(sdp, !qd->qd_change); |
1327 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1328 | } else | |
1329 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1330 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1331 | ||
f057f6cd | 1332 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1333 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1334 | |
0a7ab79c | 1335 | spin_lock(&qd_lru_lock); |
b3b94faa | 1336 | } |
0a7ab79c | 1337 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1338 | |
1339 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1340 | ||
1341 | if (sdp->sd_quota_bitmap) { | |
1342 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1343 | kfree(sdp->sd_quota_bitmap[x]); | |
1344 | kfree(sdp->sd_quota_bitmap); | |
1345 | } | |
1346 | } | |
1347 | ||
37b2c837 SW |
1348 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1349 | { | |
1350 | if (error == 0 || error == -EROFS) | |
1351 | return; | |
1352 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1353 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1354 | } | |
1355 | ||
1356 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1357 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1358 | unsigned long t, unsigned long *timeo, |
1359 | unsigned int *new_timeo) | |
1360 | { | |
1361 | if (t >= *timeo) { | |
8c42d637 | 1362 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1363 | quotad_error(sdp, msg, error); |
1364 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1365 | } else { | |
1366 | *timeo -= t; | |
1367 | } | |
1368 | } | |
1369 | ||
813e0c46 SW |
1370 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1371 | { | |
1372 | struct gfs2_inode *ip; | |
1373 | ||
1374 | while(1) { | |
1375 | ip = NULL; | |
1376 | spin_lock(&sdp->sd_trunc_lock); | |
1377 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1378 | ip = list_entry(sdp->sd_trunc_list.next, | |
1379 | struct gfs2_inode, i_trunc_list); | |
1380 | list_del_init(&ip->i_trunc_list); | |
1381 | } | |
1382 | spin_unlock(&sdp->sd_trunc_lock); | |
1383 | if (ip == NULL) | |
1384 | return; | |
1385 | gfs2_glock_finish_truncate(ip); | |
1386 | } | |
1387 | } | |
1388 | ||
3d3c10f2 BM |
1389 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1390 | if (!sdp->sd_statfs_force_sync) { | |
1391 | sdp->sd_statfs_force_sync = 1; | |
1392 | wake_up(&sdp->sd_quota_wait); | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | ||
37b2c837 SW |
1397 | /** |
1398 | * gfs2_quotad - Write cached quota changes into the quota file | |
1399 | * @sdp: Pointer to GFS2 superblock | |
1400 | * | |
1401 | */ | |
1402 | ||
1403 | int gfs2_quotad(void *data) | |
1404 | { | |
1405 | struct gfs2_sbd *sdp = data; | |
1406 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1407 | unsigned long statfs_timeo = 0; | |
1408 | unsigned long quotad_timeo = 0; | |
1409 | unsigned long t = 0; | |
1410 | DEFINE_WAIT(wait); | |
813e0c46 | 1411 | int empty; |
37b2c837 SW |
1412 | |
1413 | while (!kthread_should_stop()) { | |
1414 | ||
1415 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1416 | if (sdp->sd_statfs_force_sync) { |
1417 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1418 | quotad_error(sdp, "statfs", error); | |
1419 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1420 | } | |
1421 | else | |
1422 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1423 | &statfs_timeo, | |
1424 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1425 | |
1426 | /* Update quota file */ | |
5fb324ad | 1427 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t, |
37b2c837 SW |
1428 | "ad_timeo, &tune->gt_quota_quantum); |
1429 | ||
813e0c46 SW |
1430 | /* Check for & recover partially truncated inodes */ |
1431 | quotad_check_trunc_list(sdp); | |
1432 | ||
a0acae0e TH |
1433 | try_to_freeze(); |
1434 | ||
37b2c837 SW |
1435 | t = min(quotad_timeo, statfs_timeo); |
1436 | ||
7fa5d20d | 1437 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1438 | spin_lock(&sdp->sd_trunc_lock); |
1439 | empty = list_empty(&sdp->sd_trunc_list); | |
1440 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1441 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1442 | t -= schedule_timeout(t); |
1443 | else | |
1444 | t = 0; | |
37b2c837 SW |
1445 | finish_wait(&sdp->sd_quota_wait, &wait); |
1446 | } | |
1447 | ||
1448 | return 0; | |
1449 | } | |
1450 | ||
1d371b5e SW |
1451 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1452 | struct fs_quota_stat *fqs) | |
1453 | { | |
1454 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1455 | ||
1456 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1457 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1458 | |
1459 | switch (sdp->sd_args.ar_quota) { | |
1460 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1461 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1462 | /*FALLTHRU*/ |
1463 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1464 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1465 | break; |
1466 | case GFS2_QUOTA_OFF: | |
1467 | break; | |
1468 | } | |
1469 | ||
1d371b5e SW |
1470 | if (sdp->sd_quota_inode) { |
1471 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1472 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1473 | } | |
1474 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1475 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1476 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1477 | return 0; | |
1478 | } | |
1479 | ||
74a8a103 | 1480 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
b9b2dd36 | 1481 | struct fs_disk_quota *fdq) |
113d6b3c SW |
1482 | { |
1483 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1484 | struct gfs2_quota_lvb *qlvb; | |
1485 | struct gfs2_quota_data *qd; | |
1486 | struct gfs2_holder q_gh; | |
1487 | int error; | |
74a8a103 | 1488 | int type; |
113d6b3c SW |
1489 | |
1490 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1491 | ||
1492 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1493 | return -ESRCH; /* Crazy XFS error code */ | |
1494 | ||
74a8a103 | 1495 | if (qid.type == USRQUOTA) |
113d6b3c | 1496 | type = QUOTA_USER; |
74a8a103 | 1497 | else if (qid.type == GRPQUOTA) |
113d6b3c SW |
1498 | type = QUOTA_GROUP; |
1499 | else | |
1500 | return -EINVAL; | |
1501 | ||
74a8a103 | 1502 | error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd); |
113d6b3c SW |
1503 | if (error) |
1504 | return error; | |
1505 | error = do_glock(qd, FORCE, &q_gh); | |
1506 | if (error) | |
1507 | goto out; | |
1508 | ||
4e2f8849 | 1509 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
113d6b3c | 1510 | fdq->d_version = FS_DQUOT_VERSION; |
ade7ce31 | 1511 | fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
74a8a103 | 1512 | fdq->d_id = from_kqid(&init_user_ns, qid); |
14870b45 AD |
1513 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1514 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1515 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1516 | |
1517 | gfs2_glock_dq_uninit(&q_gh); | |
1518 | out: | |
1519 | qd_put(qd); | |
1520 | return error; | |
1521 | } | |
1522 | ||
e285c100 | 1523 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1524 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1525 | |
74a8a103 | 1526 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
c472b432 | 1527 | struct fs_disk_quota *fdq) |
e285c100 SW |
1528 | { |
1529 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1530 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1531 | struct gfs2_quota_data *qd; | |
1532 | struct gfs2_holder q_gh, i_gh; | |
1533 | unsigned int data_blocks, ind_blocks; | |
1534 | unsigned int blocks = 0; | |
1535 | int alloc_required; | |
e285c100 SW |
1536 | loff_t offset; |
1537 | int error; | |
74a8a103 | 1538 | int type; |
e285c100 SW |
1539 | |
1540 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1541 | return -ESRCH; /* Crazy XFS error code */ | |
1542 | ||
74a8a103 | 1543 | switch(qid.type) { |
e285c100 SW |
1544 | case USRQUOTA: |
1545 | type = QUOTA_USER; | |
ade7ce31 | 1546 | if (fdq->d_flags != FS_USER_QUOTA) |
e285c100 SW |
1547 | return -EINVAL; |
1548 | break; | |
1549 | case GRPQUOTA: | |
1550 | type = QUOTA_GROUP; | |
ade7ce31 | 1551 | if (fdq->d_flags != FS_GROUP_QUOTA) |
e285c100 SW |
1552 | return -EINVAL; |
1553 | break; | |
1554 | default: | |
1555 | return -EINVAL; | |
1556 | } | |
1557 | ||
1558 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1559 | return -EINVAL; | |
74a8a103 | 1560 | if (fdq->d_id != from_kqid(&init_user_ns, qid)) |
e285c100 SW |
1561 | return -EINVAL; |
1562 | ||
74a8a103 | 1563 | error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd); |
e285c100 SW |
1564 | if (error) |
1565 | return error; | |
1566 | ||
0a305e49 BP |
1567 | error = gfs2_rs_alloc(ip); |
1568 | if (error) | |
1569 | goto out_put; | |
1570 | ||
e285c100 SW |
1571 | mutex_lock(&ip->i_inode.i_mutex); |
1572 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1573 | if (error) | |
0a305e49 | 1574 | goto out_unlockput; |
e285c100 SW |
1575 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1576 | if (error) | |
1577 | goto out_q; | |
1578 | ||
1579 | /* Check for existing entry, if none then alloc new blocks */ | |
1580 | error = update_qd(sdp, qd); | |
1581 | if (error) | |
1582 | goto out_i; | |
1583 | ||
1584 | /* If nothing has changed, this is a no-op */ | |
1585 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1586 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1587 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1588 | |
e285c100 | 1589 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1590 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1591 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1592 | |
1593 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1594 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1595 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1596 | ||
e285c100 SW |
1597 | if (fdq->d_fieldmask == 0) |
1598 | goto out_i; | |
1599 | ||
1600 | offset = qd2offset(qd); | |
461cb419 | 1601 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e79a46a0 AD |
1602 | if (gfs2_is_stuffed(ip)) |
1603 | alloc_required = 1; | |
e285c100 | 1604 | if (alloc_required) { |
e285c100 SW |
1605 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
1606 | &data_blocks, &ind_blocks); | |
564e12b1 | 1607 | blocks = 1 + data_blocks + ind_blocks; |
9dbe9610 | 1608 | error = gfs2_inplace_reserve(ip, blocks, 0); |
e285c100 | 1609 | if (error) |
564e12b1 | 1610 | goto out_i; |
71f890f7 | 1611 | blocks += gfs2_rg_blocks(ip, blocks); |
e285c100 SW |
1612 | } |
1613 | ||
e79a46a0 AD |
1614 | /* Some quotas span block boundaries and can update two blocks, |
1615 | adding an extra block to the transaction to handle such quotas */ | |
1616 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); | |
e285c100 SW |
1617 | if (error) |
1618 | goto out_release; | |
1619 | ||
1620 | /* Apply changes */ | |
1621 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1622 | ||
1623 | gfs2_trans_end(sdp); | |
1624 | out_release: | |
564e12b1 | 1625 | if (alloc_required) |
e285c100 | 1626 | gfs2_inplace_release(ip); |
e285c100 SW |
1627 | out_i: |
1628 | gfs2_glock_dq_uninit(&i_gh); | |
1629 | out_q: | |
1630 | gfs2_glock_dq_uninit(&q_gh); | |
0a305e49 | 1631 | out_unlockput: |
e285c100 | 1632 | mutex_unlock(&ip->i_inode.i_mutex); |
0a305e49 | 1633 | out_put: |
e285c100 SW |
1634 | qd_put(qd); |
1635 | return error; | |
1636 | } | |
1637 | ||
cc632e7f SW |
1638 | const struct quotactl_ops gfs2_quotactl_ops = { |
1639 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1640 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1641 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1642 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1643 | }; |