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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> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/completion.h> | |
43 | #include <linux/buffer_head.h> | |
b3b94faa | 44 | #include <linux/sort.h> |
18ec7d5c | 45 | #include <linux/fs.h> |
2e565bb6 | 46 | #include <linux/bio.h> |
5c676f6d | 47 | #include <linux/gfs2_ondisk.h> |
37b2c837 SW |
48 | #include <linux/kthread.h> |
49 | #include <linux/freezer.h> | |
1d371b5e | 50 | #include <linux/dqblk_xfs.h> |
b3b94faa DT |
51 | |
52 | #include "gfs2.h" | |
5c676f6d | 53 | #include "incore.h" |
b3b94faa DT |
54 | #include "bmap.h" |
55 | #include "glock.h" | |
56 | #include "glops.h" | |
b3b94faa DT |
57 | #include "log.h" |
58 | #include "meta_io.h" | |
59 | #include "quota.h" | |
60 | #include "rgrp.h" | |
61 | #include "super.h" | |
62 | #include "trans.h" | |
18ec7d5c | 63 | #include "inode.h" |
5c676f6d | 64 | #include "util.h" |
b3b94faa DT |
65 | |
66 | #define QUOTA_USER 1 | |
67 | #define QUOTA_GROUP 0 | |
68 | ||
bb8d8a6f SW |
69 | struct gfs2_quota_change_host { |
70 | u64 qc_change; | |
71 | u32 qc_flags; /* GFS2_QCF_... */ | |
72 | u32 qc_id; | |
73 | }; | |
74 | ||
0a7ab79c AD |
75 | static LIST_HEAD(qd_lru_list); |
76 | static atomic_t qd_lru_count = ATOMIC_INIT(0); | |
1328df72 | 77 | static DEFINE_SPINLOCK(qd_lru_lock); |
0a7ab79c AD |
78 | |
79 | int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask) | |
80 | { | |
81 | struct gfs2_quota_data *qd; | |
82 | struct gfs2_sbd *sdp; | |
83 | ||
84 | if (nr == 0) | |
85 | goto out; | |
86 | ||
87 | if (!(gfp_mask & __GFP_FS)) | |
88 | return -1; | |
89 | ||
90 | spin_lock(&qd_lru_lock); | |
91 | while (nr && !list_empty(&qd_lru_list)) { | |
92 | qd = list_entry(qd_lru_list.next, | |
93 | struct gfs2_quota_data, qd_reclaim); | |
94 | sdp = qd->qd_gl->gl_sbd; | |
95 | ||
96 | /* Free from the filesystem-specific list */ | |
97 | list_del(&qd->qd_list); | |
98 | ||
0a7ab79c AD |
99 | gfs2_assert_warn(sdp, !qd->qd_change); |
100 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
101 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
102 | ||
f057f6cd | 103 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
104 | atomic_dec(&sdp->sd_quota_count); |
105 | ||
106 | /* Delete it from the common reclaim list */ | |
107 | list_del_init(&qd->qd_reclaim); | |
108 | atomic_dec(&qd_lru_count); | |
109 | spin_unlock(&qd_lru_lock); | |
110 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
111 | spin_lock(&qd_lru_lock); | |
112 | nr--; | |
113 | } | |
114 | spin_unlock(&qd_lru_lock); | |
115 | ||
116 | out: | |
117 | return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100; | |
118 | } | |
119 | ||
cd915493 | 120 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 121 | { |
cd915493 | 122 | u64 offset; |
b3b94faa | 123 | |
cd915493 | 124 | offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags); |
b3b94faa DT |
125 | offset *= sizeof(struct gfs2_quota); |
126 | ||
127 | return offset; | |
128 | } | |
129 | ||
cd915493 | 130 | static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
131 | struct gfs2_quota_data **qdp) |
132 | { | |
133 | struct gfs2_quota_data *qd; | |
134 | int error; | |
135 | ||
37b2c837 | 136 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
137 | if (!qd) |
138 | return -ENOMEM; | |
139 | ||
0a7ab79c | 140 | atomic_set(&qd->qd_count, 1); |
b3b94faa DT |
141 | qd->qd_id = id; |
142 | if (user) | |
143 | set_bit(QDF_USER, &qd->qd_flags); | |
144 | qd->qd_slot = -1; | |
0a7ab79c | 145 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 146 | |
cd915493 | 147 | error = gfs2_glock_get(sdp, 2 * (u64)id + !user, |
b3b94faa DT |
148 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
149 | if (error) | |
150 | goto fail; | |
151 | ||
b3b94faa DT |
152 | *qdp = qd; |
153 | ||
154 | return 0; | |
155 | ||
a91ea69f | 156 | fail: |
37b2c837 | 157 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
158 | return error; |
159 | } | |
160 | ||
6a6ada81 | 161 | static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
162 | struct gfs2_quota_data **qdp) |
163 | { | |
164 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
165 | int error, found; | |
166 | ||
167 | *qdp = NULL; | |
168 | ||
169 | for (;;) { | |
170 | found = 0; | |
0a7ab79c | 171 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
172 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
173 | if (qd->qd_id == id && | |
174 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { | |
0a7ab79c AD |
175 | if (!atomic_read(&qd->qd_count) && |
176 | !list_empty(&qd->qd_reclaim)) { | |
177 | /* Remove it from reclaim list */ | |
178 | list_del_init(&qd->qd_reclaim); | |
179 | atomic_dec(&qd_lru_count); | |
180 | } | |
181 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
182 | found = 1; |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | if (!found) | |
188 | qd = NULL; | |
189 | ||
190 | if (!qd && new_qd) { | |
191 | qd = new_qd; | |
192 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
193 | atomic_inc(&sdp->sd_quota_count); | |
194 | new_qd = NULL; | |
195 | } | |
196 | ||
0a7ab79c | 197 | spin_unlock(&qd_lru_lock); |
b3b94faa | 198 | |
6a6ada81 | 199 | if (qd) { |
b3b94faa | 200 | if (new_qd) { |
f057f6cd | 201 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 202 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
203 | } |
204 | *qdp = qd; | |
205 | return 0; | |
206 | } | |
207 | ||
208 | error = qd_alloc(sdp, user, id, &new_qd); | |
209 | if (error) | |
210 | return error; | |
211 | } | |
212 | } | |
213 | ||
214 | static void qd_hold(struct gfs2_quota_data *qd) | |
215 | { | |
216 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
0a7ab79c AD |
217 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
218 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
219 | } |
220 | ||
221 | static void qd_put(struct gfs2_quota_data *qd) | |
222 | { | |
0a7ab79c AD |
223 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
224 | /* Add to the reclaim list */ | |
225 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
226 | atomic_inc(&qd_lru_count); | |
227 | spin_unlock(&qd_lru_lock); | |
228 | } | |
b3b94faa DT |
229 | } |
230 | ||
231 | static int slot_get(struct gfs2_quota_data *qd) | |
232 | { | |
233 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
234 | unsigned int c, o = 0, b; | |
235 | unsigned char byte = 0; | |
236 | ||
22077f57 | 237 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
238 | |
239 | if (qd->qd_slot_count++) { | |
22077f57 | 240 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
241 | return 0; |
242 | } | |
243 | ||
244 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
245 | for (o = 0; o < PAGE_SIZE; o++) { | |
246 | byte = sdp->sd_quota_bitmap[c][o]; | |
247 | if (byte != 0xFF) | |
248 | goto found; | |
249 | } | |
250 | ||
251 | goto fail; | |
252 | ||
a91ea69f | 253 | found: |
b3b94faa DT |
254 | for (b = 0; b < 8; b++) |
255 | if (!(byte & (1 << b))) | |
256 | break; | |
257 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
258 | ||
259 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
260 | goto fail; | |
261 | ||
262 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
263 | ||
22077f57 | 264 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
265 | |
266 | return 0; | |
267 | ||
a91ea69f | 268 | fail: |
b3b94faa | 269 | qd->qd_slot_count--; |
22077f57 | 270 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
271 | return -ENOSPC; |
272 | } | |
273 | ||
274 | static void slot_hold(struct gfs2_quota_data *qd) | |
275 | { | |
276 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
277 | ||
22077f57 | 278 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
279 | gfs2_assert(sdp, qd->qd_slot_count); |
280 | qd->qd_slot_count++; | |
22077f57 | 281 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
282 | } |
283 | ||
284 | static void slot_put(struct gfs2_quota_data *qd) | |
285 | { | |
286 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
287 | ||
22077f57 | 288 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
289 | gfs2_assert(sdp, qd->qd_slot_count); |
290 | if (!--qd->qd_slot_count) { | |
291 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
292 | qd->qd_slot = -1; | |
293 | } | |
22077f57 | 294 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
295 | } |
296 | ||
297 | static int bh_get(struct gfs2_quota_data *qd) | |
298 | { | |
299 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 300 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 301 | unsigned int block, offset; |
b3b94faa DT |
302 | struct buffer_head *bh; |
303 | int error; | |
23591256 | 304 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 305 | |
f55ab26a | 306 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
307 | |
308 | if (qd->qd_bh_count++) { | |
f55ab26a | 309 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
310 | return 0; |
311 | } | |
312 | ||
313 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 314 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 315 | |
23591256 | 316 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 317 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
318 | if (error) |
319 | goto fail; | |
7276b3b0 | 320 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
321 | if (error) |
322 | goto fail; | |
323 | error = -EIO; | |
324 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
325 | goto fail_brelse; | |
326 | ||
327 | qd->qd_bh = bh; | |
328 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
329 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
330 | offset * sizeof(struct gfs2_quota_change)); | |
331 | ||
2e95b665 | 332 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
333 | |
334 | return 0; | |
335 | ||
a91ea69f | 336 | fail_brelse: |
b3b94faa | 337 | brelse(bh); |
a91ea69f | 338 | fail: |
b3b94faa | 339 | qd->qd_bh_count--; |
f55ab26a | 340 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
341 | return error; |
342 | } | |
343 | ||
344 | static void bh_put(struct gfs2_quota_data *qd) | |
345 | { | |
346 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
347 | ||
f55ab26a | 348 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
349 | gfs2_assert(sdp, qd->qd_bh_count); |
350 | if (!--qd->qd_bh_count) { | |
351 | brelse(qd->qd_bh); | |
352 | qd->qd_bh = NULL; | |
353 | qd->qd_bh_qc = NULL; | |
354 | } | |
f55ab26a | 355 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
356 | } |
357 | ||
358 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
359 | { | |
360 | struct gfs2_quota_data *qd = NULL; | |
361 | int error; | |
362 | int found = 0; | |
363 | ||
364 | *qdp = NULL; | |
365 | ||
366 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
367 | return 0; | |
368 | ||
0a7ab79c | 369 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
370 | |
371 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
372 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
373 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
374 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
375 | continue; | |
376 | ||
377 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
378 | ||
379 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
380 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
381 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
382 | qd->qd_change_sync = qd->qd_change; |
383 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
384 | qd->qd_slot_count++; | |
385 | found = 1; | |
386 | ||
387 | break; | |
388 | } | |
389 | ||
390 | if (!found) | |
391 | qd = NULL; | |
392 | ||
0a7ab79c | 393 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
394 | |
395 | if (qd) { | |
396 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
397 | error = bh_get(qd); | |
398 | if (error) { | |
399 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
400 | slot_put(qd); | |
401 | qd_put(qd); | |
402 | return error; | |
403 | } | |
404 | } | |
405 | ||
406 | *qdp = qd; | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static int qd_trylock(struct gfs2_quota_data *qd) | |
412 | { | |
413 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
414 | ||
415 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
416 | return 0; | |
417 | ||
0a7ab79c | 418 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
419 | |
420 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
421 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 422 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
423 | return 0; |
424 | } | |
425 | ||
426 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
427 | ||
428 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
429 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
430 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
431 | qd->qd_change_sync = qd->qd_change; |
432 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
433 | qd->qd_slot_count++; | |
434 | ||
0a7ab79c | 435 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
436 | |
437 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
438 | if (bh_get(qd)) { | |
439 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
440 | slot_put(qd); | |
441 | qd_put(qd); | |
442 | return 0; | |
443 | } | |
444 | ||
445 | return 1; | |
446 | } | |
447 | ||
448 | static void qd_unlock(struct gfs2_quota_data *qd) | |
449 | { | |
568f4c96 SW |
450 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
451 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
452 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
453 | bh_put(qd); | |
454 | slot_put(qd); | |
455 | qd_put(qd); | |
456 | } | |
457 | ||
33a82529 | 458 | static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
459 | struct gfs2_quota_data **qdp) |
460 | { | |
461 | int error; | |
462 | ||
6a6ada81 | 463 | error = qd_get(sdp, user, id, qdp); |
b3b94faa DT |
464 | if (error) |
465 | return error; | |
466 | ||
467 | error = slot_get(*qdp); | |
468 | if (error) | |
469 | goto fail; | |
470 | ||
471 | error = bh_get(*qdp); | |
472 | if (error) | |
473 | goto fail_slot; | |
474 | ||
475 | return 0; | |
476 | ||
a91ea69f | 477 | fail_slot: |
b3b94faa | 478 | slot_put(*qdp); |
a91ea69f | 479 | fail: |
b3b94faa DT |
480 | qd_put(*qdp); |
481 | return error; | |
482 | } | |
483 | ||
484 | static void qdsb_put(struct gfs2_quota_data *qd) | |
485 | { | |
486 | bh_put(qd); | |
487 | slot_put(qd); | |
488 | qd_put(qd); | |
489 | } | |
490 | ||
cd915493 | 491 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 492 | { |
feaa7bba | 493 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 494 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
495 | struct gfs2_quota_data **qd = al->al_qd; |
496 | int error; | |
497 | ||
498 | if (gfs2_assert_warn(sdp, !al->al_qd_num) || | |
499 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) | |
500 | return -EIO; | |
501 | ||
502 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
503 | return 0; | |
504 | ||
33a82529 | 505 | error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd); |
b3b94faa DT |
506 | if (error) |
507 | goto out; | |
508 | al->al_qd_num++; | |
509 | qd++; | |
510 | ||
33a82529 | 511 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd); |
b3b94faa DT |
512 | if (error) |
513 | goto out; | |
514 | al->al_qd_num++; | |
515 | qd++; | |
516 | ||
2933f925 | 517 | if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
33a82529 | 518 | error = qdsb_get(sdp, QUOTA_USER, uid, qd); |
b3b94faa DT |
519 | if (error) |
520 | goto out; | |
521 | al->al_qd_num++; | |
522 | qd++; | |
523 | } | |
524 | ||
2933f925 | 525 | if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
33a82529 | 526 | error = qdsb_get(sdp, QUOTA_GROUP, gid, qd); |
b3b94faa DT |
527 | if (error) |
528 | goto out; | |
529 | al->al_qd_num++; | |
530 | qd++; | |
531 | } | |
532 | ||
a91ea69f | 533 | out: |
b3b94faa DT |
534 | if (error) |
535 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
536 | return error; |
537 | } | |
538 | ||
539 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
540 | { | |
feaa7bba | 541 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 542 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
543 | unsigned int x; |
544 | ||
545 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); | |
546 | ||
547 | for (x = 0; x < al->al_qd_num; x++) { | |
548 | qdsb_put(al->al_qd[x]); | |
549 | al->al_qd[x] = NULL; | |
550 | } | |
551 | al->al_qd_num = 0; | |
552 | } | |
553 | ||
554 | static int sort_qd(const void *a, const void *b) | |
555 | { | |
48fac179 SW |
556 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
557 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa DT |
558 | |
559 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != | |
560 | !test_bit(QDF_USER, &qd_b->qd_flags)) { | |
561 | if (test_bit(QDF_USER, &qd_a->qd_flags)) | |
48fac179 | 562 | return -1; |
b3b94faa | 563 | else |
48fac179 | 564 | return 1; |
b3b94faa | 565 | } |
48fac179 SW |
566 | if (qd_a->qd_id < qd_b->qd_id) |
567 | return -1; | |
568 | if (qd_a->qd_id > qd_b->qd_id) | |
569 | return 1; | |
b3b94faa | 570 | |
48fac179 | 571 | return 0; |
b3b94faa DT |
572 | } |
573 | ||
cd915493 | 574 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
575 | { |
576 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 577 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 578 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 579 | s64 x; |
b3b94faa | 580 | |
f55ab26a | 581 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 582 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
583 | |
584 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
585 | qc->qc_change = 0; | |
586 | qc->qc_flags = 0; | |
587 | if (test_bit(QDF_USER, &qd->qd_flags)) | |
588 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); | |
589 | qc->qc_id = cpu_to_be32(qd->qd_id); | |
590 | } | |
591 | ||
b44b84d7 | 592 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
593 | qc->qc_change = cpu_to_be64(x); |
594 | ||
22077f57 | 595 | spin_lock(&qd_lru_lock); |
b3b94faa | 596 | qd->qd_change = x; |
22077f57 | 597 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
598 | |
599 | if (!x) { | |
600 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
601 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
602 | qc->qc_flags = 0; | |
603 | qc->qc_id = 0; | |
604 | slot_put(qd); | |
605 | qd_put(qd); | |
606 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
607 | qd_hold(qd); | |
608 | slot_hold(qd); | |
609 | } | |
907b9bce | 610 | |
f55ab26a | 611 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
612 | } |
613 | ||
18ec7d5c | 614 | /** |
1e72c0f7 SW |
615 | * gfs2_adjust_quota - adjust record of current block usage |
616 | * @ip: The quota inode | |
617 | * @loc: Offset of the entry in the quota file | |
618 | * @change: The amount of change to record | |
619 | * @qd: The quota data | |
18ec7d5c SW |
620 | * |
621 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
622 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
623 | * |
624 | * Returns: 0 or -ve on error | |
18ec7d5c | 625 | */ |
1e72c0f7 | 626 | |
18ec7d5c | 627 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
cd915493 | 628 | s64 change, struct gfs2_quota_data *qd) |
18ec7d5c | 629 | { |
feaa7bba | 630 | struct inode *inode = &ip->i_inode; |
18ec7d5c SW |
631 | struct address_space *mapping = inode->i_mapping; |
632 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 633 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c SW |
634 | unsigned blocksize, iblock, pos; |
635 | struct buffer_head *bh; | |
636 | struct page *page; | |
637 | void *kaddr; | |
1e72c0f7 | 638 | struct gfs2_quota *qp; |
e9fc2aa0 | 639 | s64 value; |
18ec7d5c SW |
640 | int err = -EIO; |
641 | ||
20b95bf2 | 642 | if (gfs2_is_stuffed(ip)) |
0fd53554 | 643 | gfs2_unstuff_dinode(ip, NULL); |
20b95bf2 | 644 | |
18ec7d5c SW |
645 | page = grab_cache_page(mapping, index); |
646 | if (!page) | |
647 | return -ENOMEM; | |
648 | ||
649 | blocksize = inode->i_sb->s_blocksize; | |
650 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
651 | ||
652 | if (!page_has_buffers(page)) | |
653 | create_empty_buffers(page, blocksize, 0); | |
654 | ||
655 | bh = page_buffers(page); | |
656 | pos = blocksize; | |
657 | while (offset >= pos) { | |
658 | bh = bh->b_this_page; | |
659 | iblock++; | |
660 | pos += blocksize; | |
661 | } | |
662 | ||
663 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 664 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c SW |
665 | if (!buffer_mapped(bh)) |
666 | goto unlock; | |
667 | } | |
668 | ||
669 | if (PageUptodate(page)) | |
670 | set_buffer_uptodate(bh); | |
671 | ||
672 | if (!buffer_uptodate(bh)) { | |
2e565bb6 | 673 | ll_rw_block(READ_META, 1, &bh); |
18ec7d5c SW |
674 | wait_on_buffer(bh); |
675 | if (!buffer_uptodate(bh)) | |
676 | goto unlock; | |
677 | } | |
678 | ||
679 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
680 | ||
681 | kaddr = kmap_atomic(page, KM_USER0); | |
1e72c0f7 SW |
682 | qp = kaddr + offset; |
683 | value = (s64)be64_to_cpu(qp->qu_value) + change; | |
684 | qp->qu_value = cpu_to_be64(value); | |
685 | qd->qd_qb.qb_value = qp->qu_value; | |
18ec7d5c SW |
686 | flush_dcache_page(page); |
687 | kunmap_atomic(kaddr, KM_USER0); | |
688 | err = 0; | |
18ec7d5c SW |
689 | unlock: |
690 | unlock_page(page); | |
691 | page_cache_release(page); | |
692 | return err; | |
693 | } | |
694 | ||
b3b94faa DT |
695 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
696 | { | |
697 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 698 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
699 | unsigned int data_blocks, ind_blocks; |
700 | struct gfs2_holder *ghs, i_gh; | |
701 | unsigned int qx, x; | |
702 | struct gfs2_quota_data *qd; | |
f42faf4f | 703 | loff_t offset; |
20b95bf2 | 704 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
705 | struct gfs2_alloc *al = NULL; |
706 | int error; | |
707 | ||
708 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), | |
709 | &data_blocks, &ind_blocks); | |
710 | ||
16c5f06f | 711 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
712 | if (!ghs) |
713 | return -ENOMEM; | |
714 | ||
715 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
716 | for (qx = 0; qx < num_qd; qx++) { | |
1e72c0f7 | 717 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
718 | GL_NOCACHE, &ghs[qx]); |
719 | if (error) | |
720 | goto out; | |
721 | } | |
722 | ||
723 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
724 | if (error) | |
725 | goto out; | |
726 | ||
727 | for (x = 0; x < num_qd; x++) { | |
728 | int alloc_required; | |
729 | ||
730 | offset = qd2offset(qda[x]); | |
731 | error = gfs2_write_alloc_required(ip, offset, | |
732 | sizeof(struct gfs2_quota), | |
733 | &alloc_required); | |
734 | if (error) | |
735 | goto out_gunlock; | |
736 | if (alloc_required) | |
737 | nalloc++; | |
738 | } | |
739 | ||
20b95bf2 AD |
740 | al = gfs2_alloc_get(ip); |
741 | if (!al) { | |
742 | error = -ENOMEM; | |
743 | goto out_gunlock; | |
744 | } | |
745 | /* | |
746 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
747 | * block to the reservation unconditionally. If the inode | |
748 | * doesn't need unstuffing, the block will be released to the | |
749 | * rgrp since it won't be allocated during the transaction | |
750 | */ | |
751 | al->al_requested = 1; | |
752 | /* +1 in the end for block requested above for unstuffing */ | |
753 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 1; | |
b3b94faa | 754 | |
20b95bf2 AD |
755 | if (nalloc) |
756 | al->al_requested += nalloc * (data_blocks + ind_blocks); | |
757 | error = gfs2_inplace_reserve(ip); | |
758 | if (error) | |
759 | goto out_alloc; | |
b3b94faa | 760 | |
20b95bf2 AD |
761 | if (nalloc) |
762 | blocks += al->al_rgd->rd_length + nalloc * ind_blocks + RES_STATFS; | |
763 | ||
764 | error = gfs2_trans_begin(sdp, blocks, 0); | |
765 | if (error) | |
766 | goto out_ipres; | |
b3b94faa DT |
767 | |
768 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
769 | qd = qda[x]; |
770 | offset = qd2offset(qd); | |
18ec7d5c | 771 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, |
1e72c0f7 | 772 | (struct gfs2_quota_data *)qd); |
18ec7d5c | 773 | if (error) |
b3b94faa | 774 | goto out_end_trans; |
b3b94faa DT |
775 | |
776 | do_qc(qd, -qd->qd_change_sync); | |
b3b94faa DT |
777 | } |
778 | ||
779 | error = 0; | |
780 | ||
a91ea69f | 781 | out_end_trans: |
b3b94faa | 782 | gfs2_trans_end(sdp); |
a91ea69f | 783 | out_ipres: |
20b95bf2 | 784 | gfs2_inplace_release(ip); |
a91ea69f | 785 | out_alloc: |
20b95bf2 | 786 | gfs2_alloc_put(ip); |
a91ea69f | 787 | out_gunlock: |
b3b94faa | 788 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 789 | out: |
b3b94faa DT |
790 | while (qx--) |
791 | gfs2_glock_dq_uninit(&ghs[qx]); | |
792 | kfree(ghs); | |
b09e593d | 793 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
794 | return error; |
795 | } | |
796 | ||
797 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, | |
798 | struct gfs2_holder *q_gh) | |
799 | { | |
800 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 801 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 802 | struct gfs2_holder i_gh; |
1e72c0f7 | 803 | struct gfs2_quota q; |
b3b94faa | 804 | int error; |
e9fc2aa0 | 805 | struct gfs2_quota_lvb *qlvb; |
b3b94faa | 806 | |
a91ea69f | 807 | restart: |
b3b94faa DT |
808 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
809 | if (error) | |
810 | return error; | |
811 | ||
e9fc2aa0 | 812 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
b3b94faa | 813 | |
e9fc2aa0 | 814 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
f42faf4f | 815 | loff_t pos; |
b3b94faa | 816 | gfs2_glock_dq_uninit(q_gh); |
91094d0f SW |
817 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
818 | GL_NOCACHE, q_gh); | |
b3b94faa DT |
819 | if (error) |
820 | return error; | |
821 | ||
e9fc2aa0 | 822 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
823 | if (error) |
824 | goto fail; | |
825 | ||
1e72c0f7 | 826 | memset(&q, 0, sizeof(struct gfs2_quota)); |
f42faf4f | 827 | pos = qd2offset(qd); |
1e72c0f7 | 828 | error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q)); |
b3b94faa DT |
829 | if (error < 0) |
830 | goto fail_gunlock; | |
1e72c0f7 SW |
831 | if ((error < sizeof(q)) && force_refresh) { |
832 | error = -ENOENT; | |
833 | goto fail_gunlock; | |
834 | } | |
b3b94faa DT |
835 | gfs2_glock_dq_uninit(&i_gh); |
836 | ||
e9fc2aa0 SW |
837 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
838 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); | |
839 | qlvb->__pad = 0; | |
1e72c0f7 SW |
840 | qlvb->qb_limit = q.qu_limit; |
841 | qlvb->qb_warn = q.qu_warn; | |
842 | qlvb->qb_value = q.qu_value; | |
e9fc2aa0 | 843 | qd->qd_qb = *qlvb; |
b3b94faa | 844 | |
91094d0f SW |
845 | gfs2_glock_dq_uninit(q_gh); |
846 | force_refresh = 0; | |
847 | goto restart; | |
b3b94faa DT |
848 | } |
849 | ||
850 | return 0; | |
851 | ||
a91ea69f | 852 | fail_gunlock: |
b3b94faa | 853 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 854 | fail: |
b3b94faa | 855 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
856 | return error; |
857 | } | |
858 | ||
cd915493 | 859 | int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 860 | { |
feaa7bba | 861 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 862 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
863 | unsigned int x; |
864 | int error = 0; | |
865 | ||
866 | gfs2_quota_hold(ip, uid, gid); | |
867 | ||
868 | if (capable(CAP_SYS_RESOURCE) || | |
869 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
870 | return 0; | |
871 | ||
872 | sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *), | |
873 | sort_qd, NULL); | |
874 | ||
875 | for (x = 0; x < al->al_qd_num; x++) { | |
876 | error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]); | |
877 | if (error) | |
878 | break; | |
879 | } | |
880 | ||
881 | if (!error) | |
882 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
883 | else { | |
884 | while (x--) | |
885 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
886 | gfs2_quota_unhold(ip); | |
887 | } | |
888 | ||
889 | return error; | |
890 | } | |
891 | ||
892 | static int need_sync(struct gfs2_quota_data *qd) | |
893 | { | |
894 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
895 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 896 | s64 value; |
b3b94faa DT |
897 | unsigned int num, den; |
898 | int do_sync = 1; | |
899 | ||
900 | if (!qd->qd_qb.qb_limit) | |
901 | return 0; | |
902 | ||
22077f57 | 903 | spin_lock(&qd_lru_lock); |
b3b94faa | 904 | value = qd->qd_change; |
22077f57 | 905 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
906 | |
907 | spin_lock(>->gt_spin); | |
908 | num = gt->gt_quota_scale_num; | |
909 | den = gt->gt_quota_scale_den; | |
910 | spin_unlock(>->gt_spin); | |
911 | ||
912 | if (value < 0) | |
913 | do_sync = 0; | |
e9fc2aa0 SW |
914 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
915 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
916 | do_sync = 0; |
917 | else { | |
918 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 919 | value = div_s64(value, den); |
e9fc2aa0 | 920 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 921 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
922 | do_sync = 0; |
923 | } | |
924 | ||
925 | return do_sync; | |
926 | } | |
927 | ||
928 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
929 | { | |
6dbd8224 | 930 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
931 | struct gfs2_quota_data *qda[4]; |
932 | unsigned int count = 0; | |
933 | unsigned int x; | |
934 | ||
935 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
936 | goto out; | |
937 | ||
938 | for (x = 0; x < al->al_qd_num; x++) { | |
939 | struct gfs2_quota_data *qd; | |
940 | int sync; | |
941 | ||
942 | qd = al->al_qd[x]; | |
943 | sync = need_sync(qd); | |
944 | ||
945 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
946 | ||
947 | if (sync && qd_trylock(qd)) | |
948 | qda[count++] = qd; | |
949 | } | |
950 | ||
951 | if (count) { | |
952 | do_sync(count, qda); | |
953 | for (x = 0; x < count; x++) | |
954 | qd_unlock(qda[x]); | |
955 | } | |
956 | ||
a91ea69f | 957 | out: |
b3b94faa DT |
958 | gfs2_quota_unhold(ip); |
959 | } | |
960 | ||
961 | #define MAX_LINE 256 | |
962 | ||
963 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
964 | { | |
965 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 966 | |
02630a12 SW |
967 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\r\n", |
968 | sdp->sd_fsname, type, | |
969 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", | |
970 | qd->qd_id); | |
b3b94faa DT |
971 | |
972 | return 0; | |
973 | } | |
974 | ||
cd915493 | 975 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 976 | { |
feaa7bba | 977 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 978 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa | 979 | struct gfs2_quota_data *qd; |
cd915493 | 980 | s64 value; |
b3b94faa DT |
981 | unsigned int x; |
982 | int error = 0; | |
983 | ||
984 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
985 | return 0; | |
986 | ||
987 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
988 | return 0; | |
989 | ||
990 | for (x = 0; x < al->al_qd_num; x++) { | |
991 | qd = al->al_qd[x]; | |
992 | ||
993 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
994 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) | |
995 | continue; | |
996 | ||
e9fc2aa0 | 997 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 998 | spin_lock(&qd_lru_lock); |
b3b94faa | 999 | value += qd->qd_change; |
22077f57 | 1000 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1001 | |
cd915493 | 1002 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa DT |
1003 | print_message(qd, "exceeded"); |
1004 | error = -EDQUOT; | |
1005 | break; | |
e9fc2aa0 | 1006 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1007 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1008 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1009 | gfs2_tune_get(sdp, |
1010 | gt_quota_warn_period) * HZ)) { | |
b3b94faa DT |
1011 | error = print_message(qd, "warning"); |
1012 | qd->qd_last_warn = jiffies; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | return error; | |
1017 | } | |
1018 | ||
cd915493 SW |
1019 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1020 | u32 uid, u32 gid) | |
b3b94faa | 1021 | { |
6dbd8224 | 1022 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1023 | struct gfs2_quota_data *qd; |
1024 | unsigned int x; | |
b3b94faa | 1025 | |
feaa7bba | 1026 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1027 | return; |
383f01fb | 1028 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1029 | return; |
1030 | ||
1031 | for (x = 0; x < al->al_qd_num; x++) { | |
1032 | qd = al->al_qd[x]; | |
1033 | ||
1034 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1035 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { | |
1036 | do_qc(qd, change); | |
b3b94faa DT |
1037 | } |
1038 | } | |
1039 | } | |
1040 | ||
8c42d637 | 1041 | int gfs2_quota_sync(struct super_block *sb, int type) |
b3b94faa | 1042 | { |
8c42d637 | 1043 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
1044 | struct gfs2_quota_data **qda; |
1045 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1046 | unsigned int num_qd; | |
1047 | unsigned int x; | |
1048 | int error = 0; | |
1049 | ||
1050 | sdp->sd_quota_sync_gen++; | |
1051 | ||
1052 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1053 | if (!qda) | |
1054 | return -ENOMEM; | |
1055 | ||
1056 | do { | |
1057 | num_qd = 0; | |
1058 | ||
1059 | for (;;) { | |
1060 | error = qd_fish(sdp, qda + num_qd); | |
1061 | if (error || !qda[num_qd]) | |
1062 | break; | |
1063 | if (++num_qd == max_qd) | |
1064 | break; | |
1065 | } | |
1066 | ||
1067 | if (num_qd) { | |
1068 | if (!error) | |
1069 | error = do_sync(num_qd, qda); | |
1070 | if (!error) | |
1071 | for (x = 0; x < num_qd; x++) | |
1072 | qda[x]->qd_sync_gen = | |
1073 | sdp->sd_quota_sync_gen; | |
1074 | ||
1075 | for (x = 0; x < num_qd; x++) | |
1076 | qd_unlock(qda[x]); | |
1077 | } | |
1078 | } while (!error && num_qd == max_qd); | |
1079 | ||
1080 | kfree(qda); | |
1081 | ||
1082 | return error; | |
1083 | } | |
1084 | ||
cd915493 | 1085 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) |
b3b94faa DT |
1086 | { |
1087 | struct gfs2_quota_data *qd; | |
1088 | struct gfs2_holder q_gh; | |
1089 | int error; | |
1090 | ||
6a6ada81 | 1091 | error = qd_get(sdp, user, id, &qd); |
b3b94faa DT |
1092 | if (error) |
1093 | return error; | |
1094 | ||
1095 | error = do_glock(qd, FORCE, &q_gh); | |
1096 | if (!error) | |
1097 | gfs2_glock_dq_uninit(&q_gh); | |
1098 | ||
1099 | qd_put(qd); | |
b3b94faa DT |
1100 | return error; |
1101 | } | |
1102 | ||
bb8d8a6f SW |
1103 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1104 | { | |
1105 | const struct gfs2_quota_change *str = buf; | |
1106 | ||
1107 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1108 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
1109 | qc->qc_id = be32_to_cpu(str->qc_id); | |
1110 | } | |
1111 | ||
b3b94faa DT |
1112 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1113 | { | |
feaa7bba | 1114 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
c9e98886 | 1115 | unsigned int blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; |
b3b94faa DT |
1116 | unsigned int x, slot = 0; |
1117 | unsigned int found = 0; | |
cd915493 SW |
1118 | u64 dblock; |
1119 | u32 extlen = 0; | |
b3b94faa DT |
1120 | int error; |
1121 | ||
c9e98886 SW |
1122 | if (!ip->i_disksize || ip->i_disksize > (64 << 20) || |
1123 | ip->i_disksize & (sdp->sd_sb.sb_bsize - 1)) { | |
b3b94faa | 1124 | gfs2_consist_inode(ip); |
907b9bce | 1125 | return -EIO; |
b3b94faa DT |
1126 | } |
1127 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; | |
5c676f6d | 1128 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1129 | |
1130 | error = -ENOMEM; | |
1131 | ||
1132 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1133 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1134 | if (!sdp->sd_quota_bitmap) |
1135 | return error; | |
1136 | ||
1137 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1138 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1139 | if (!sdp->sd_quota_bitmap[x]) |
1140 | goto fail; | |
1141 | } | |
1142 | ||
1143 | for (x = 0; x < blocks; x++) { | |
1144 | struct buffer_head *bh; | |
1145 | unsigned int y; | |
1146 | ||
1147 | if (!extlen) { | |
1148 | int new = 0; | |
feaa7bba | 1149 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1150 | if (error) |
1151 | goto fail; | |
1152 | } | |
b3b94faa | 1153 | error = -EIO; |
7276b3b0 SW |
1154 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1155 | if (!bh) | |
1156 | goto fail; | |
b3b94faa DT |
1157 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1158 | brelse(bh); | |
1159 | goto fail; | |
1160 | } | |
1161 | ||
7276b3b0 | 1162 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1163 | y++, slot++) { |
b62f963e | 1164 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1165 | struct gfs2_quota_data *qd; |
1166 | ||
1167 | gfs2_quota_change_in(&qc, bh->b_data + | |
1168 | sizeof(struct gfs2_meta_header) + | |
1169 | y * sizeof(struct gfs2_quota_change)); | |
1170 | if (!qc.qc_change) | |
1171 | continue; | |
1172 | ||
1173 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), | |
1174 | qc.qc_id, &qd); | |
1175 | if (error) { | |
1176 | brelse(bh); | |
1177 | goto fail; | |
1178 | } | |
1179 | ||
1180 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1181 | qd->qd_change = qc.qc_change; | |
1182 | qd->qd_slot = slot; | |
1183 | qd->qd_slot_count = 1; | |
b3b94faa | 1184 | |
0a7ab79c | 1185 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1186 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1187 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1188 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1189 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1190 | |
1191 | found++; | |
1192 | } | |
1193 | ||
1194 | brelse(bh); | |
1195 | dblock++; | |
1196 | extlen--; | |
1197 | } | |
1198 | ||
1199 | if (found) | |
1200 | fs_info(sdp, "found %u quota changes\n", found); | |
1201 | ||
1202 | return 0; | |
1203 | ||
a91ea69f | 1204 | fail: |
b3b94faa DT |
1205 | gfs2_quota_cleanup(sdp); |
1206 | return error; | |
1207 | } | |
1208 | ||
b3b94faa DT |
1209 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1210 | { | |
1211 | struct list_head *head = &sdp->sd_quota_list; | |
1212 | struct gfs2_quota_data *qd; | |
1213 | unsigned int x; | |
1214 | ||
0a7ab79c | 1215 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1216 | while (!list_empty(head)) { |
1217 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1218 | ||
0a7ab79c AD |
1219 | if (atomic_read(&qd->qd_count) > 1 || |
1220 | (atomic_read(&qd->qd_count) && | |
1221 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1222 | list_move(&qd->qd_list, head); |
1223 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1224 | schedule(); |
0a7ab79c | 1225 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1226 | continue; |
1227 | } | |
1228 | ||
1229 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1230 | /* Also remove if this qd exists in the reclaim list */ |
1231 | if (!list_empty(&qd->qd_reclaim)) { | |
1232 | list_del_init(&qd->qd_reclaim); | |
1233 | atomic_dec(&qd_lru_count); | |
1234 | } | |
b3b94faa | 1235 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1236 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1237 | |
0a7ab79c | 1238 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1239 | gfs2_assert_warn(sdp, !qd->qd_change); |
1240 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1241 | } else | |
1242 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1243 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1244 | ||
f057f6cd | 1245 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1246 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1247 | |
0a7ab79c | 1248 | spin_lock(&qd_lru_lock); |
b3b94faa | 1249 | } |
0a7ab79c | 1250 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1251 | |
1252 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1253 | ||
1254 | if (sdp->sd_quota_bitmap) { | |
1255 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1256 | kfree(sdp->sd_quota_bitmap[x]); | |
1257 | kfree(sdp->sd_quota_bitmap); | |
1258 | } | |
1259 | } | |
1260 | ||
37b2c837 SW |
1261 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1262 | { | |
1263 | if (error == 0 || error == -EROFS) | |
1264 | return; | |
1265 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1266 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1267 | } | |
1268 | ||
1269 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1270 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1271 | unsigned long t, unsigned long *timeo, |
1272 | unsigned int *new_timeo) | |
1273 | { | |
1274 | if (t >= *timeo) { | |
8c42d637 | 1275 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1276 | quotad_error(sdp, msg, error); |
1277 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1278 | } else { | |
1279 | *timeo -= t; | |
1280 | } | |
1281 | } | |
1282 | ||
813e0c46 SW |
1283 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1284 | { | |
1285 | struct gfs2_inode *ip; | |
1286 | ||
1287 | while(1) { | |
1288 | ip = NULL; | |
1289 | spin_lock(&sdp->sd_trunc_lock); | |
1290 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1291 | ip = list_entry(sdp->sd_trunc_list.next, | |
1292 | struct gfs2_inode, i_trunc_list); | |
1293 | list_del_init(&ip->i_trunc_list); | |
1294 | } | |
1295 | spin_unlock(&sdp->sd_trunc_lock); | |
1296 | if (ip == NULL) | |
1297 | return; | |
1298 | gfs2_glock_finish_truncate(ip); | |
1299 | } | |
1300 | } | |
1301 | ||
37b2c837 SW |
1302 | /** |
1303 | * gfs2_quotad - Write cached quota changes into the quota file | |
1304 | * @sdp: Pointer to GFS2 superblock | |
1305 | * | |
1306 | */ | |
1307 | ||
1308 | int gfs2_quotad(void *data) | |
1309 | { | |
1310 | struct gfs2_sbd *sdp = data; | |
1311 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1312 | unsigned long statfs_timeo = 0; | |
1313 | unsigned long quotad_timeo = 0; | |
1314 | unsigned long t = 0; | |
1315 | DEFINE_WAIT(wait); | |
813e0c46 | 1316 | int empty; |
37b2c837 SW |
1317 | |
1318 | while (!kthread_should_stop()) { | |
1319 | ||
1320 | /* Update the master statfs file */ | |
1321 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1322 | &statfs_timeo, &tune->gt_statfs_quantum); | |
1323 | ||
1324 | /* Update quota file */ | |
1325 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, | |
1326 | "ad_timeo, &tune->gt_quota_quantum); | |
1327 | ||
813e0c46 SW |
1328 | /* Check for & recover partially truncated inodes */ |
1329 | quotad_check_trunc_list(sdp); | |
1330 | ||
37b2c837 SW |
1331 | if (freezing(current)) |
1332 | refrigerator(); | |
1333 | t = min(quotad_timeo, statfs_timeo); | |
1334 | ||
7fa5d20d | 1335 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1336 | spin_lock(&sdp->sd_trunc_lock); |
1337 | empty = list_empty(&sdp->sd_trunc_list); | |
1338 | spin_unlock(&sdp->sd_trunc_lock); | |
1339 | if (empty) | |
1340 | t -= schedule_timeout(t); | |
1341 | else | |
1342 | t = 0; | |
37b2c837 SW |
1343 | finish_wait(&sdp->sd_quota_wait, &wait); |
1344 | } | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
1d371b5e SW |
1349 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1350 | struct fs_quota_stat *fqs) | |
1351 | { | |
1352 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1353 | ||
1354 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1355 | fqs->qs_version = FS_QSTAT_VERSION; | |
1356 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_ON) | |
1357 | fqs->qs_flags = (XFS_QUOTA_UDQ_ENFD | XFS_QUOTA_GDQ_ENFD); | |
1358 | else if (sdp->sd_args.ar_quota == GFS2_QUOTA_ACCOUNT) | |
1359 | fqs->qs_flags = (XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_GDQ_ACCT); | |
1360 | if (sdp->sd_quota_inode) { | |
1361 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1362 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1363 | } | |
1364 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1365 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1366 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1367 | return 0; | |
1368 | } | |
1369 | ||
cc632e7f SW |
1370 | const struct quotactl_ops gfs2_quotactl_ops = { |
1371 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1372 | .get_xstate = gfs2_quota_get_xstate, |
cc632e7f SW |
1373 | }; |
1374 |