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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> | |
2ec46505 | 50 | #include <linux/quota.h> |
1d371b5e | 51 | #include <linux/dqblk_xfs.h> |
b3b94faa DT |
52 | |
53 | #include "gfs2.h" | |
5c676f6d | 54 | #include "incore.h" |
b3b94faa DT |
55 | #include "bmap.h" |
56 | #include "glock.h" | |
57 | #include "glops.h" | |
b3b94faa DT |
58 | #include "log.h" |
59 | #include "meta_io.h" | |
60 | #include "quota.h" | |
61 | #include "rgrp.h" | |
62 | #include "super.h" | |
63 | #include "trans.h" | |
18ec7d5c | 64 | #include "inode.h" |
5c676f6d | 65 | #include "util.h" |
b3b94faa DT |
66 | |
67 | #define QUOTA_USER 1 | |
68 | #define QUOTA_GROUP 0 | |
69 | ||
bb8d8a6f SW |
70 | struct gfs2_quota_change_host { |
71 | u64 qc_change; | |
72 | u32 qc_flags; /* GFS2_QCF_... */ | |
73 | u32 qc_id; | |
74 | }; | |
75 | ||
0a7ab79c AD |
76 | static LIST_HEAD(qd_lru_list); |
77 | static atomic_t qd_lru_count = ATOMIC_INIT(0); | |
1328df72 | 78 | static DEFINE_SPINLOCK(qd_lru_lock); |
0a7ab79c | 79 | |
7f8275d0 | 80 | int gfs2_shrink_qd_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask) |
0a7ab79c AD |
81 | { |
82 | struct gfs2_quota_data *qd; | |
83 | struct gfs2_sbd *sdp; | |
84 | ||
85 | if (nr == 0) | |
86 | goto out; | |
87 | ||
88 | if (!(gfp_mask & __GFP_FS)) | |
89 | return -1; | |
90 | ||
91 | spin_lock(&qd_lru_lock); | |
92 | while (nr && !list_empty(&qd_lru_list)) { | |
93 | qd = list_entry(qd_lru_list.next, | |
94 | struct gfs2_quota_data, qd_reclaim); | |
95 | sdp = qd->qd_gl->gl_sbd; | |
96 | ||
97 | /* Free from the filesystem-specific list */ | |
98 | list_del(&qd->qd_list); | |
99 | ||
0a7ab79c AD |
100 | gfs2_assert_warn(sdp, !qd->qd_change); |
101 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
102 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
103 | ||
f057f6cd | 104 | gfs2_glock_put(qd->qd_gl); |
0a7ab79c AD |
105 | atomic_dec(&sdp->sd_quota_count); |
106 | ||
107 | /* Delete it from the common reclaim list */ | |
108 | list_del_init(&qd->qd_reclaim); | |
109 | atomic_dec(&qd_lru_count); | |
110 | spin_unlock(&qd_lru_lock); | |
111 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
112 | spin_lock(&qd_lru_lock); | |
113 | nr--; | |
114 | } | |
115 | spin_unlock(&qd_lru_lock); | |
116 | ||
117 | out: | |
118 | return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100; | |
119 | } | |
120 | ||
cd915493 | 121 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 122 | { |
cd915493 | 123 | u64 offset; |
b3b94faa | 124 | |
cd915493 | 125 | offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags); |
b3b94faa DT |
126 | offset *= sizeof(struct gfs2_quota); |
127 | ||
128 | return offset; | |
129 | } | |
130 | ||
cd915493 | 131 | static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
132 | struct gfs2_quota_data **qdp) |
133 | { | |
134 | struct gfs2_quota_data *qd; | |
135 | int error; | |
136 | ||
37b2c837 | 137 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
138 | if (!qd) |
139 | return -ENOMEM; | |
140 | ||
0a7ab79c | 141 | atomic_set(&qd->qd_count, 1); |
b3b94faa DT |
142 | qd->qd_id = id; |
143 | if (user) | |
144 | set_bit(QDF_USER, &qd->qd_flags); | |
145 | qd->qd_slot = -1; | |
0a7ab79c | 146 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 147 | |
cd915493 | 148 | error = gfs2_glock_get(sdp, 2 * (u64)id + !user, |
b3b94faa DT |
149 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
150 | if (error) | |
151 | goto fail; | |
152 | ||
b3b94faa DT |
153 | *qdp = qd; |
154 | ||
155 | return 0; | |
156 | ||
a91ea69f | 157 | fail: |
37b2c837 | 158 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
159 | return error; |
160 | } | |
161 | ||
6a6ada81 | 162 | static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
163 | struct gfs2_quota_data **qdp) |
164 | { | |
165 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
166 | int error, found; | |
167 | ||
168 | *qdp = NULL; | |
169 | ||
170 | for (;;) { | |
171 | found = 0; | |
0a7ab79c | 172 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
173 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
174 | if (qd->qd_id == id && | |
175 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { | |
0a7ab79c AD |
176 | if (!atomic_read(&qd->qd_count) && |
177 | !list_empty(&qd->qd_reclaim)) { | |
178 | /* Remove it from reclaim list */ | |
179 | list_del_init(&qd->qd_reclaim); | |
180 | atomic_dec(&qd_lru_count); | |
181 | } | |
182 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
183 | found = 1; |
184 | break; | |
185 | } | |
186 | } | |
187 | ||
188 | if (!found) | |
189 | qd = NULL; | |
190 | ||
191 | if (!qd && new_qd) { | |
192 | qd = new_qd; | |
193 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
194 | atomic_inc(&sdp->sd_quota_count); | |
195 | new_qd = NULL; | |
196 | } | |
197 | ||
0a7ab79c | 198 | spin_unlock(&qd_lru_lock); |
b3b94faa | 199 | |
6a6ada81 | 200 | if (qd) { |
b3b94faa | 201 | if (new_qd) { |
f057f6cd | 202 | gfs2_glock_put(new_qd->qd_gl); |
37b2c837 | 203 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
204 | } |
205 | *qdp = qd; | |
206 | return 0; | |
207 | } | |
208 | ||
209 | error = qd_alloc(sdp, user, id, &new_qd); | |
210 | if (error) | |
211 | return error; | |
212 | } | |
213 | } | |
214 | ||
215 | static void qd_hold(struct gfs2_quota_data *qd) | |
216 | { | |
217 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
0a7ab79c AD |
218 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
219 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
220 | } |
221 | ||
222 | static void qd_put(struct gfs2_quota_data *qd) | |
223 | { | |
0a7ab79c AD |
224 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
225 | /* Add to the reclaim list */ | |
226 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
227 | atomic_inc(&qd_lru_count); | |
228 | spin_unlock(&qd_lru_lock); | |
229 | } | |
b3b94faa DT |
230 | } |
231 | ||
232 | static int slot_get(struct gfs2_quota_data *qd) | |
233 | { | |
234 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
235 | unsigned int c, o = 0, b; | |
236 | unsigned char byte = 0; | |
237 | ||
22077f57 | 238 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
239 | |
240 | if (qd->qd_slot_count++) { | |
22077f57 | 241 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
242 | return 0; |
243 | } | |
244 | ||
245 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
246 | for (o = 0; o < PAGE_SIZE; o++) { | |
247 | byte = sdp->sd_quota_bitmap[c][o]; | |
248 | if (byte != 0xFF) | |
249 | goto found; | |
250 | } | |
251 | ||
252 | goto fail; | |
253 | ||
a91ea69f | 254 | found: |
b3b94faa DT |
255 | for (b = 0; b < 8; b++) |
256 | if (!(byte & (1 << b))) | |
257 | break; | |
258 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
259 | ||
260 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
261 | goto fail; | |
262 | ||
263 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
264 | ||
22077f57 | 265 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
266 | |
267 | return 0; | |
268 | ||
a91ea69f | 269 | fail: |
b3b94faa | 270 | qd->qd_slot_count--; |
22077f57 | 271 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
272 | return -ENOSPC; |
273 | } | |
274 | ||
275 | static void slot_hold(struct gfs2_quota_data *qd) | |
276 | { | |
277 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
278 | ||
22077f57 | 279 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
280 | gfs2_assert(sdp, qd->qd_slot_count); |
281 | qd->qd_slot_count++; | |
22077f57 | 282 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
283 | } |
284 | ||
285 | static void slot_put(struct gfs2_quota_data *qd) | |
286 | { | |
287 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
288 | ||
22077f57 | 289 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
290 | gfs2_assert(sdp, qd->qd_slot_count); |
291 | if (!--qd->qd_slot_count) { | |
292 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
293 | qd->qd_slot = -1; | |
294 | } | |
22077f57 | 295 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
296 | } |
297 | ||
298 | static int bh_get(struct gfs2_quota_data *qd) | |
299 | { | |
300 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 301 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 302 | unsigned int block, offset; |
b3b94faa DT |
303 | struct buffer_head *bh; |
304 | int error; | |
23591256 | 305 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 306 | |
f55ab26a | 307 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
308 | |
309 | if (qd->qd_bh_count++) { | |
f55ab26a | 310 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
311 | return 0; |
312 | } | |
313 | ||
314 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 315 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 316 | |
23591256 | 317 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 318 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
319 | if (error) |
320 | goto fail; | |
7276b3b0 | 321 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
322 | if (error) |
323 | goto fail; | |
324 | error = -EIO; | |
325 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
326 | goto fail_brelse; | |
327 | ||
328 | qd->qd_bh = bh; | |
329 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
330 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
331 | offset * sizeof(struct gfs2_quota_change)); | |
332 | ||
2e95b665 | 333 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
334 | |
335 | return 0; | |
336 | ||
a91ea69f | 337 | fail_brelse: |
b3b94faa | 338 | brelse(bh); |
a91ea69f | 339 | fail: |
b3b94faa | 340 | qd->qd_bh_count--; |
f55ab26a | 341 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
342 | return error; |
343 | } | |
344 | ||
345 | static void bh_put(struct gfs2_quota_data *qd) | |
346 | { | |
347 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
348 | ||
f55ab26a | 349 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
350 | gfs2_assert(sdp, qd->qd_bh_count); |
351 | if (!--qd->qd_bh_count) { | |
352 | brelse(qd->qd_bh); | |
353 | qd->qd_bh = NULL; | |
354 | qd->qd_bh_qc = NULL; | |
355 | } | |
f55ab26a | 356 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
357 | } |
358 | ||
359 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
360 | { | |
361 | struct gfs2_quota_data *qd = NULL; | |
362 | int error; | |
363 | int found = 0; | |
364 | ||
365 | *qdp = NULL; | |
366 | ||
367 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
368 | return 0; | |
369 | ||
0a7ab79c | 370 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
371 | |
372 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
373 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
374 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
375 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
376 | continue; | |
377 | ||
378 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
379 | ||
380 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
381 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
382 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
383 | qd->qd_change_sync = qd->qd_change; |
384 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
385 | qd->qd_slot_count++; | |
386 | found = 1; | |
387 | ||
388 | break; | |
389 | } | |
390 | ||
391 | if (!found) | |
392 | qd = NULL; | |
393 | ||
0a7ab79c | 394 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
395 | |
396 | if (qd) { | |
397 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
398 | error = bh_get(qd); | |
399 | if (error) { | |
400 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
401 | slot_put(qd); | |
402 | qd_put(qd); | |
403 | return error; | |
404 | } | |
405 | } | |
406 | ||
407 | *qdp = qd; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int qd_trylock(struct gfs2_quota_data *qd) | |
413 | { | |
414 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
415 | ||
416 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
417 | return 0; | |
418 | ||
0a7ab79c | 419 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
420 | |
421 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
422 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 423 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
424 | return 0; |
425 | } | |
426 | ||
427 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
428 | ||
429 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
430 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
431 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
432 | qd->qd_change_sync = qd->qd_change; |
433 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
434 | qd->qd_slot_count++; | |
435 | ||
0a7ab79c | 436 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
437 | |
438 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
439 | if (bh_get(qd)) { | |
440 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
441 | slot_put(qd); | |
442 | qd_put(qd); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | return 1; | |
447 | } | |
448 | ||
449 | static void qd_unlock(struct gfs2_quota_data *qd) | |
450 | { | |
568f4c96 SW |
451 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
452 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
453 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
454 | bh_put(qd); | |
455 | slot_put(qd); | |
456 | qd_put(qd); | |
457 | } | |
458 | ||
33a82529 | 459 | static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
460 | struct gfs2_quota_data **qdp) |
461 | { | |
462 | int error; | |
463 | ||
6a6ada81 | 464 | error = qd_get(sdp, user, id, qdp); |
b3b94faa DT |
465 | if (error) |
466 | return error; | |
467 | ||
468 | error = slot_get(*qdp); | |
469 | if (error) | |
470 | goto fail; | |
471 | ||
472 | error = bh_get(*qdp); | |
473 | if (error) | |
474 | goto fail_slot; | |
475 | ||
476 | return 0; | |
477 | ||
a91ea69f | 478 | fail_slot: |
b3b94faa | 479 | slot_put(*qdp); |
a91ea69f | 480 | fail: |
b3b94faa DT |
481 | qd_put(*qdp); |
482 | return error; | |
483 | } | |
484 | ||
485 | static void qdsb_put(struct gfs2_quota_data *qd) | |
486 | { | |
487 | bh_put(qd); | |
488 | slot_put(qd); | |
489 | qd_put(qd); | |
490 | } | |
491 | ||
cd915493 | 492 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 493 | { |
feaa7bba | 494 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 495 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
496 | struct gfs2_quota_data **qd = al->al_qd; |
497 | int error; | |
498 | ||
499 | if (gfs2_assert_warn(sdp, !al->al_qd_num) || | |
500 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) | |
501 | return -EIO; | |
502 | ||
503 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
504 | return 0; | |
505 | ||
33a82529 | 506 | error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd); |
b3b94faa DT |
507 | if (error) |
508 | goto out; | |
509 | al->al_qd_num++; | |
510 | qd++; | |
511 | ||
33a82529 | 512 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd); |
b3b94faa DT |
513 | if (error) |
514 | goto out; | |
515 | al->al_qd_num++; | |
516 | qd++; | |
517 | ||
2933f925 | 518 | if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
33a82529 | 519 | error = qdsb_get(sdp, QUOTA_USER, uid, qd); |
b3b94faa DT |
520 | if (error) |
521 | goto out; | |
522 | al->al_qd_num++; | |
523 | qd++; | |
524 | } | |
525 | ||
2933f925 | 526 | if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
33a82529 | 527 | error = qdsb_get(sdp, QUOTA_GROUP, gid, qd); |
b3b94faa DT |
528 | if (error) |
529 | goto out; | |
530 | al->al_qd_num++; | |
531 | qd++; | |
532 | } | |
533 | ||
a91ea69f | 534 | out: |
b3b94faa DT |
535 | if (error) |
536 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
537 | return error; |
538 | } | |
539 | ||
540 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
541 | { | |
feaa7bba | 542 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 543 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
544 | unsigned int x; |
545 | ||
546 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); | |
547 | ||
548 | for (x = 0; x < al->al_qd_num; x++) { | |
549 | qdsb_put(al->al_qd[x]); | |
550 | al->al_qd[x] = NULL; | |
551 | } | |
552 | al->al_qd_num = 0; | |
553 | } | |
554 | ||
555 | static int sort_qd(const void *a, const void *b) | |
556 | { | |
48fac179 SW |
557 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
558 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa DT |
559 | |
560 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != | |
561 | !test_bit(QDF_USER, &qd_b->qd_flags)) { | |
562 | if (test_bit(QDF_USER, &qd_a->qd_flags)) | |
48fac179 | 563 | return -1; |
b3b94faa | 564 | else |
48fac179 | 565 | return 1; |
b3b94faa | 566 | } |
48fac179 SW |
567 | if (qd_a->qd_id < qd_b->qd_id) |
568 | return -1; | |
569 | if (qd_a->qd_id > qd_b->qd_id) | |
570 | return 1; | |
b3b94faa | 571 | |
48fac179 | 572 | return 0; |
b3b94faa DT |
573 | } |
574 | ||
cd915493 | 575 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
576 | { |
577 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 578 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 579 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 580 | s64 x; |
b3b94faa | 581 | |
f55ab26a | 582 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 583 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
584 | |
585 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
586 | qc->qc_change = 0; | |
587 | qc->qc_flags = 0; | |
588 | if (test_bit(QDF_USER, &qd->qd_flags)) | |
589 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); | |
590 | qc->qc_id = cpu_to_be32(qd->qd_id); | |
591 | } | |
592 | ||
b44b84d7 | 593 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
594 | qc->qc_change = cpu_to_be64(x); |
595 | ||
22077f57 | 596 | spin_lock(&qd_lru_lock); |
b3b94faa | 597 | qd->qd_change = x; |
22077f57 | 598 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
599 | |
600 | if (!x) { | |
601 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
602 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
603 | qc->qc_flags = 0; | |
604 | qc->qc_id = 0; | |
605 | slot_put(qd); | |
606 | qd_put(qd); | |
607 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
608 | qd_hold(qd); | |
609 | slot_hold(qd); | |
610 | } | |
907b9bce | 611 | |
f55ab26a | 612 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
613 | } |
614 | ||
18ec7d5c | 615 | /** |
1e72c0f7 SW |
616 | * gfs2_adjust_quota - adjust record of current block usage |
617 | * @ip: The quota inode | |
618 | * @loc: Offset of the entry in the quota file | |
e285c100 | 619 | * @change: The amount of usage change to record |
1e72c0f7 | 620 | * @qd: The quota data |
e285c100 | 621 | * @fdq: The updated limits to record |
18ec7d5c SW |
622 | * |
623 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
624 | * in turn mostly borrowed from ext3 | |
1e72c0f7 SW |
625 | * |
626 | * Returns: 0 or -ve on error | |
18ec7d5c | 627 | */ |
1e72c0f7 | 628 | |
18ec7d5c | 629 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
e285c100 SW |
630 | s64 change, struct gfs2_quota_data *qd, |
631 | struct fs_disk_quota *fdq) | |
18ec7d5c | 632 | { |
feaa7bba | 633 | struct inode *inode = &ip->i_inode; |
14870b45 | 634 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
18ec7d5c SW |
635 | struct address_space *mapping = inode->i_mapping; |
636 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 637 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c | 638 | unsigned blocksize, iblock, pos; |
e285c100 | 639 | struct buffer_head *bh, *dibh; |
18ec7d5c | 640 | struct page *page; |
7e619bc3 AD |
641 | void *kaddr, *ptr; |
642 | struct gfs2_quota q, *qp; | |
643 | int err, nbytes; | |
e285c100 | 644 | u64 size; |
18ec7d5c | 645 | |
20b95bf2 | 646 | if (gfs2_is_stuffed(ip)) |
0fd53554 | 647 | gfs2_unstuff_dinode(ip, NULL); |
7e619bc3 AD |
648 | |
649 | memset(&q, 0, sizeof(struct gfs2_quota)); | |
650 | err = gfs2_internal_read(ip, NULL, (char *)&q, &loc, sizeof(q)); | |
651 | if (err < 0) | |
652 | return err; | |
653 | ||
654 | err = -EIO; | |
655 | qp = &q; | |
656 | qp->qu_value = be64_to_cpu(qp->qu_value); | |
657 | qp->qu_value += change; | |
658 | qp->qu_value = cpu_to_be64(qp->qu_value); | |
659 | qd->qd_qb.qb_value = qp->qu_value; | |
660 | if (fdq) { | |
661 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { | |
14870b45 | 662 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
663 | qd->qd_qb.qb_warn = qp->qu_warn; |
664 | } | |
665 | if (fdq->d_fieldmask & FS_DQ_BHARD) { | |
14870b45 | 666 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
7e619bc3 AD |
667 | qd->qd_qb.qb_limit = qp->qu_limit; |
668 | } | |
802ec9b6 AD |
669 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
670 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); | |
671 | qd->qd_qb.qb_value = qp->qu_value; | |
672 | } | |
7e619bc3 AD |
673 | } |
674 | ||
675 | /* Write the quota into the quota file on disk */ | |
676 | ptr = qp; | |
677 | nbytes = sizeof(struct gfs2_quota); | |
678 | get_a_page: | |
18ec7d5c SW |
679 | page = grab_cache_page(mapping, index); |
680 | if (!page) | |
681 | return -ENOMEM; | |
682 | ||
683 | blocksize = inode->i_sb->s_blocksize; | |
684 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
685 | ||
686 | if (!page_has_buffers(page)) | |
687 | create_empty_buffers(page, blocksize, 0); | |
688 | ||
689 | bh = page_buffers(page); | |
690 | pos = blocksize; | |
691 | while (offset >= pos) { | |
692 | bh = bh->b_this_page; | |
693 | iblock++; | |
694 | pos += blocksize; | |
695 | } | |
696 | ||
697 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 698 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c | 699 | if (!buffer_mapped(bh)) |
7e619bc3 AD |
700 | goto unlock_out; |
701 | /* If it's a newly allocated disk block for quota, zero it */ | |
8b421601 AD |
702 | if (buffer_new(bh)) |
703 | zero_user(page, pos - blocksize, bh->b_size); | |
18ec7d5c SW |
704 | } |
705 | ||
706 | if (PageUptodate(page)) | |
707 | set_buffer_uptodate(bh); | |
708 | ||
709 | if (!buffer_uptodate(bh)) { | |
2e565bb6 | 710 | ll_rw_block(READ_META, 1, &bh); |
18ec7d5c SW |
711 | wait_on_buffer(bh); |
712 | if (!buffer_uptodate(bh)) | |
7e619bc3 | 713 | goto unlock_out; |
18ec7d5c SW |
714 | } |
715 | ||
716 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
717 | ||
718 | kaddr = kmap_atomic(page, KM_USER0); | |
7e619bc3 AD |
719 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
720 | nbytes = PAGE_CACHE_SIZE - offset; | |
721 | memcpy(kaddr + offset, ptr, nbytes); | |
18ec7d5c SW |
722 | flush_dcache_page(page); |
723 | kunmap_atomic(kaddr, KM_USER0); | |
7e619bc3 AD |
724 | unlock_page(page); |
725 | page_cache_release(page); | |
726 | ||
727 | /* If quota straddles page boundary, we need to update the rest of the | |
728 | * quota at the beginning of the next page */ | |
8b421601 | 729 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
7e619bc3 AD |
730 | ptr = ptr + nbytes; |
731 | nbytes = sizeof(struct gfs2_quota) - nbytes; | |
732 | offset = 0; | |
733 | index++; | |
734 | goto get_a_page; | |
735 | } | |
e285c100 | 736 | |
7e619bc3 | 737 | /* Update the disk inode timestamp and size (if extended) */ |
e285c100 SW |
738 | err = gfs2_meta_inode_buffer(ip, &dibh); |
739 | if (err) | |
7e619bc3 | 740 | goto out; |
e285c100 SW |
741 | |
742 | size = loc + sizeof(struct gfs2_quota); | |
a2e0f799 | 743 | if (size > inode->i_size) |
e285c100 | 744 | i_size_write(inode, size); |
e285c100 SW |
745 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
746 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
747 | gfs2_dinode_out(ip, dibh->b_data); | |
748 | brelse(dibh); | |
749 | mark_inode_dirty(inode); | |
750 | ||
7e619bc3 AD |
751 | out: |
752 | return err; | |
753 | unlock_out: | |
18ec7d5c SW |
754 | unlock_page(page); |
755 | page_cache_release(page); | |
756 | return err; | |
757 | } | |
758 | ||
b3b94faa DT |
759 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
760 | { | |
761 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 762 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
763 | unsigned int data_blocks, ind_blocks; |
764 | struct gfs2_holder *ghs, i_gh; | |
765 | unsigned int qx, x; | |
766 | struct gfs2_quota_data *qd; | |
f42faf4f | 767 | loff_t offset; |
20b95bf2 | 768 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
769 | struct gfs2_alloc *al = NULL; |
770 | int error; | |
771 | ||
772 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), | |
773 | &data_blocks, &ind_blocks); | |
774 | ||
16c5f06f | 775 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
776 | if (!ghs) |
777 | return -ENOMEM; | |
778 | ||
779 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
e285c100 | 780 | mutex_lock_nested(&ip->i_inode.i_mutex, I_MUTEX_QUOTA); |
b3b94faa | 781 | for (qx = 0; qx < num_qd; qx++) { |
1e72c0f7 | 782 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
b3b94faa DT |
783 | GL_NOCACHE, &ghs[qx]); |
784 | if (error) | |
785 | goto out; | |
786 | } | |
787 | ||
788 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
789 | if (error) | |
790 | goto out; | |
791 | ||
792 | for (x = 0; x < num_qd; x++) { | |
b3b94faa | 793 | offset = qd2offset(qda[x]); |
461cb419 BP |
794 | if (gfs2_write_alloc_required(ip, offset, |
795 | sizeof(struct gfs2_quota))) | |
b3b94faa DT |
796 | nalloc++; |
797 | } | |
798 | ||
20b95bf2 AD |
799 | al = gfs2_alloc_get(ip); |
800 | if (!al) { | |
801 | error = -ENOMEM; | |
802 | goto out_gunlock; | |
803 | } | |
804 | /* | |
805 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
806 | * block to the reservation unconditionally. If the inode | |
807 | * doesn't need unstuffing, the block will be released to the | |
808 | * rgrp since it won't be allocated during the transaction | |
809 | */ | |
810 | al->al_requested = 1; | |
7e619bc3 AD |
811 | /* +3 in the end for unstuffing block, inode size update block |
812 | * and another block in case quota straddles page boundary and | |
813 | * two blocks need to be updated instead of 1 */ | |
814 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; | |
b3b94faa | 815 | |
20b95bf2 AD |
816 | if (nalloc) |
817 | al->al_requested += nalloc * (data_blocks + ind_blocks); | |
818 | error = gfs2_inplace_reserve(ip); | |
819 | if (error) | |
820 | goto out_alloc; | |
b3b94faa | 821 | |
20b95bf2 | 822 | if (nalloc) |
bf97b673 | 823 | blocks += gfs2_rg_blocks(al) + nalloc * ind_blocks + RES_STATFS; |
20b95bf2 AD |
824 | |
825 | error = gfs2_trans_begin(sdp, blocks, 0); | |
826 | if (error) | |
827 | goto out_ipres; | |
b3b94faa DT |
828 | |
829 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
830 | qd = qda[x]; |
831 | offset = qd2offset(qd); | |
e285c100 | 832 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
18ec7d5c | 833 | if (error) |
b3b94faa | 834 | goto out_end_trans; |
b3b94faa DT |
835 | |
836 | do_qc(qd, -qd->qd_change_sync); | |
b3b94faa DT |
837 | } |
838 | ||
839 | error = 0; | |
840 | ||
a91ea69f | 841 | out_end_trans: |
b3b94faa | 842 | gfs2_trans_end(sdp); |
a91ea69f | 843 | out_ipres: |
20b95bf2 | 844 | gfs2_inplace_release(ip); |
a91ea69f | 845 | out_alloc: |
20b95bf2 | 846 | gfs2_alloc_put(ip); |
a91ea69f | 847 | out_gunlock: |
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); | |
868 | error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q)); | |
869 | if (error < 0) | |
870 | return error; | |
871 | ||
872 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; | |
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 | ||
e9fc2aa0 | 896 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
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); |
6dbd8224 | 931 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
932 | unsigned int x; |
933 | int error = 0; | |
934 | ||
935 | gfs2_quota_hold(ip, uid, gid); | |
936 | ||
937 | if (capable(CAP_SYS_RESOURCE) || | |
938 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
939 | return 0; | |
940 | ||
941 | sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *), | |
942 | sort_qd, NULL); | |
943 | ||
944 | for (x = 0; x < al->al_qd_num; x++) { | |
945 | error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]); | |
946 | if (error) | |
947 | break; | |
948 | } | |
949 | ||
950 | if (!error) | |
951 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
952 | else { | |
953 | while (x--) | |
954 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
955 | gfs2_quota_unhold(ip); | |
956 | } | |
957 | ||
958 | return error; | |
959 | } | |
960 | ||
961 | static int need_sync(struct gfs2_quota_data *qd) | |
962 | { | |
963 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
964 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 965 | s64 value; |
b3b94faa DT |
966 | unsigned int num, den; |
967 | int do_sync = 1; | |
968 | ||
969 | if (!qd->qd_qb.qb_limit) | |
970 | return 0; | |
971 | ||
22077f57 | 972 | spin_lock(&qd_lru_lock); |
b3b94faa | 973 | value = qd->qd_change; |
22077f57 | 974 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
975 | |
976 | spin_lock(>->gt_spin); | |
977 | num = gt->gt_quota_scale_num; | |
978 | den = gt->gt_quota_scale_den; | |
979 | spin_unlock(>->gt_spin); | |
980 | ||
981 | if (value < 0) | |
982 | do_sync = 0; | |
e9fc2aa0 SW |
983 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
984 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
985 | do_sync = 0; |
986 | else { | |
987 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 988 | value = div_s64(value, den); |
e9fc2aa0 | 989 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 990 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
991 | do_sync = 0; |
992 | } | |
993 | ||
994 | return do_sync; | |
995 | } | |
996 | ||
997 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
998 | { | |
6dbd8224 | 999 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1000 | struct gfs2_quota_data *qda[4]; |
1001 | unsigned int count = 0; | |
1002 | unsigned int x; | |
1003 | ||
1004 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1005 | goto out; | |
1006 | ||
1007 | for (x = 0; x < al->al_qd_num; x++) { | |
1008 | struct gfs2_quota_data *qd; | |
1009 | int sync; | |
1010 | ||
1011 | qd = al->al_qd[x]; | |
1012 | sync = need_sync(qd); | |
1013 | ||
1014 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
1015 | ||
1016 | if (sync && qd_trylock(qd)) | |
1017 | qda[count++] = qd; | |
1018 | } | |
1019 | ||
1020 | if (count) { | |
1021 | do_sync(count, qda); | |
1022 | for (x = 0; x < count; x++) | |
1023 | qd_unlock(qda[x]); | |
1024 | } | |
1025 | ||
a91ea69f | 1026 | out: |
b3b94faa DT |
1027 | gfs2_quota_unhold(ip); |
1028 | } | |
1029 | ||
1030 | #define MAX_LINE 256 | |
1031 | ||
1032 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1033 | { | |
1034 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1035 | |
2ec46505 | 1036 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
02630a12 SW |
1037 | sdp->sd_fsname, type, |
1038 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", | |
1039 | qd->qd_id); | |
b3b94faa DT |
1040 | |
1041 | return 0; | |
1042 | } | |
1043 | ||
cd915493 | 1044 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 1045 | { |
feaa7bba | 1046 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1047 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa | 1048 | struct gfs2_quota_data *qd; |
cd915493 | 1049 | s64 value; |
b3b94faa DT |
1050 | unsigned int x; |
1051 | int error = 0; | |
1052 | ||
1053 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1054 | return 0; | |
1055 | ||
1056 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1057 | return 0; | |
1058 | ||
1059 | for (x = 0; x < al->al_qd_num; x++) { | |
1060 | qd = al->al_qd[x]; | |
1061 | ||
1062 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1063 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) | |
1064 | continue; | |
1065 | ||
e9fc2aa0 | 1066 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1067 | spin_lock(&qd_lru_lock); |
b3b94faa | 1068 | value += qd->qd_change; |
22077f57 | 1069 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1070 | |
cd915493 | 1071 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa | 1072 | print_message(qd, "exceeded"); |
2ec46505 SW |
1073 | quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ? |
1074 | USRQUOTA : GRPQUOTA, qd->qd_id, | |
1075 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); | |
1076 | ||
b3b94faa DT |
1077 | error = -EDQUOT; |
1078 | break; | |
e9fc2aa0 | 1079 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1080 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1081 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1082 | gfs2_tune_get(sdp, |
1083 | gt_quota_warn_period) * HZ)) { | |
2ec46505 SW |
1084 | quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ? |
1085 | USRQUOTA : GRPQUOTA, qd->qd_id, | |
1086 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); | |
b3b94faa DT |
1087 | error = print_message(qd, "warning"); |
1088 | qd->qd_last_warn = jiffies; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | return error; | |
1093 | } | |
1094 | ||
cd915493 SW |
1095 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1096 | u32 uid, u32 gid) | |
b3b94faa | 1097 | { |
6dbd8224 | 1098 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1099 | struct gfs2_quota_data *qd; |
1100 | unsigned int x; | |
b3b94faa | 1101 | |
feaa7bba | 1102 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1103 | return; |
383f01fb | 1104 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1105 | return; |
1106 | ||
1107 | for (x = 0; x < al->al_qd_num; x++) { | |
1108 | qd = al->al_qd[x]; | |
1109 | ||
1110 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1111 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { | |
1112 | do_qc(qd, change); | |
b3b94faa DT |
1113 | } |
1114 | } | |
1115 | } | |
1116 | ||
5fb324ad | 1117 | int gfs2_quota_sync(struct super_block *sb, int type, int wait) |
b3b94faa | 1118 | { |
8c42d637 | 1119 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
1120 | struct gfs2_quota_data **qda; |
1121 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1122 | unsigned int num_qd; | |
1123 | unsigned int x; | |
1124 | int error = 0; | |
1125 | ||
1126 | sdp->sd_quota_sync_gen++; | |
1127 | ||
1128 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1129 | if (!qda) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | do { | |
1133 | num_qd = 0; | |
1134 | ||
1135 | for (;;) { | |
1136 | error = qd_fish(sdp, qda + num_qd); | |
1137 | if (error || !qda[num_qd]) | |
1138 | break; | |
1139 | if (++num_qd == max_qd) | |
1140 | break; | |
1141 | } | |
1142 | ||
1143 | if (num_qd) { | |
1144 | if (!error) | |
1145 | error = do_sync(num_qd, qda); | |
1146 | if (!error) | |
1147 | for (x = 0; x < num_qd; x++) | |
1148 | qda[x]->qd_sync_gen = | |
1149 | sdp->sd_quota_sync_gen; | |
1150 | ||
1151 | for (x = 0; x < num_qd; x++) | |
1152 | qd_unlock(qda[x]); | |
1153 | } | |
1154 | } while (!error && num_qd == max_qd); | |
1155 | ||
1156 | kfree(qda); | |
1157 | ||
1158 | return error; | |
1159 | } | |
1160 | ||
5fb324ad CH |
1161 | static int gfs2_quota_sync_timeo(struct super_block *sb, int type) |
1162 | { | |
1163 | return gfs2_quota_sync(sb, type, 0); | |
1164 | } | |
1165 | ||
cd915493 | 1166 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) |
b3b94faa DT |
1167 | { |
1168 | struct gfs2_quota_data *qd; | |
1169 | struct gfs2_holder q_gh; | |
1170 | int error; | |
1171 | ||
6a6ada81 | 1172 | error = qd_get(sdp, user, id, &qd); |
b3b94faa DT |
1173 | if (error) |
1174 | return error; | |
1175 | ||
1176 | error = do_glock(qd, FORCE, &q_gh); | |
1177 | if (!error) | |
1178 | gfs2_glock_dq_uninit(&q_gh); | |
1179 | ||
1180 | qd_put(qd); | |
b3b94faa DT |
1181 | return error; |
1182 | } | |
1183 | ||
bb8d8a6f SW |
1184 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1185 | { | |
1186 | const struct gfs2_quota_change *str = buf; | |
1187 | ||
1188 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1189 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
1190 | qc->qc_id = be32_to_cpu(str->qc_id); | |
1191 | } | |
1192 | ||
b3b94faa DT |
1193 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1194 | { | |
feaa7bba | 1195 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
a2e0f799 SW |
1196 | u64 size = i_size_read(sdp->sd_qc_inode); |
1197 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; | |
b3b94faa DT |
1198 | unsigned int x, slot = 0; |
1199 | unsigned int found = 0; | |
cd915493 SW |
1200 | u64 dblock; |
1201 | u32 extlen = 0; | |
b3b94faa DT |
1202 | int error; |
1203 | ||
a2e0f799 | 1204 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
907b9bce | 1205 | return -EIO; |
a2e0f799 | 1206 | |
b3b94faa | 1207 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
5c676f6d | 1208 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1209 | |
1210 | error = -ENOMEM; | |
1211 | ||
1212 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1213 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1214 | if (!sdp->sd_quota_bitmap) |
1215 | return error; | |
1216 | ||
1217 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1218 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1219 | if (!sdp->sd_quota_bitmap[x]) |
1220 | goto fail; | |
1221 | } | |
1222 | ||
1223 | for (x = 0; x < blocks; x++) { | |
1224 | struct buffer_head *bh; | |
1225 | unsigned int y; | |
1226 | ||
1227 | if (!extlen) { | |
1228 | int new = 0; | |
feaa7bba | 1229 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1230 | if (error) |
1231 | goto fail; | |
1232 | } | |
b3b94faa | 1233 | error = -EIO; |
7276b3b0 SW |
1234 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1235 | if (!bh) | |
1236 | goto fail; | |
b3b94faa DT |
1237 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1238 | brelse(bh); | |
1239 | goto fail; | |
1240 | } | |
1241 | ||
7276b3b0 | 1242 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1243 | y++, slot++) { |
b62f963e | 1244 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1245 | struct gfs2_quota_data *qd; |
1246 | ||
1247 | gfs2_quota_change_in(&qc, bh->b_data + | |
1248 | sizeof(struct gfs2_meta_header) + | |
1249 | y * sizeof(struct gfs2_quota_change)); | |
1250 | if (!qc.qc_change) | |
1251 | continue; | |
1252 | ||
1253 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), | |
1254 | qc.qc_id, &qd); | |
1255 | if (error) { | |
1256 | brelse(bh); | |
1257 | goto fail; | |
1258 | } | |
1259 | ||
1260 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1261 | qd->qd_change = qc.qc_change; | |
1262 | qd->qd_slot = slot; | |
1263 | qd->qd_slot_count = 1; | |
b3b94faa | 1264 | |
0a7ab79c | 1265 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1266 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1267 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1268 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1269 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1270 | |
1271 | found++; | |
1272 | } | |
1273 | ||
1274 | brelse(bh); | |
1275 | dblock++; | |
1276 | extlen--; | |
1277 | } | |
1278 | ||
1279 | if (found) | |
1280 | fs_info(sdp, "found %u quota changes\n", found); | |
1281 | ||
1282 | return 0; | |
1283 | ||
a91ea69f | 1284 | fail: |
b3b94faa DT |
1285 | gfs2_quota_cleanup(sdp); |
1286 | return error; | |
1287 | } | |
1288 | ||
b3b94faa DT |
1289 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1290 | { | |
1291 | struct list_head *head = &sdp->sd_quota_list; | |
1292 | struct gfs2_quota_data *qd; | |
1293 | unsigned int x; | |
1294 | ||
0a7ab79c | 1295 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1296 | while (!list_empty(head)) { |
1297 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1298 | ||
0a7ab79c AD |
1299 | if (atomic_read(&qd->qd_count) > 1 || |
1300 | (atomic_read(&qd->qd_count) && | |
1301 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1302 | list_move(&qd->qd_list, head); |
1303 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1304 | schedule(); |
0a7ab79c | 1305 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1306 | continue; |
1307 | } | |
1308 | ||
1309 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1310 | /* Also remove if this qd exists in the reclaim list */ |
1311 | if (!list_empty(&qd->qd_reclaim)) { | |
1312 | list_del_init(&qd->qd_reclaim); | |
1313 | atomic_dec(&qd_lru_count); | |
1314 | } | |
b3b94faa | 1315 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1316 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1317 | |
0a7ab79c | 1318 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1319 | gfs2_assert_warn(sdp, !qd->qd_change); |
1320 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1321 | } else | |
1322 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1323 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1324 | ||
f057f6cd | 1325 | gfs2_glock_put(qd->qd_gl); |
37b2c837 | 1326 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1327 | |
0a7ab79c | 1328 | spin_lock(&qd_lru_lock); |
b3b94faa | 1329 | } |
0a7ab79c | 1330 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1331 | |
1332 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1333 | ||
1334 | if (sdp->sd_quota_bitmap) { | |
1335 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1336 | kfree(sdp->sd_quota_bitmap[x]); | |
1337 | kfree(sdp->sd_quota_bitmap); | |
1338 | } | |
1339 | } | |
1340 | ||
37b2c837 SW |
1341 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1342 | { | |
1343 | if (error == 0 || error == -EROFS) | |
1344 | return; | |
1345 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1346 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1347 | } | |
1348 | ||
1349 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
8c42d637 | 1350 | int (*fxn)(struct super_block *sb, int type), |
37b2c837 SW |
1351 | unsigned long t, unsigned long *timeo, |
1352 | unsigned int *new_timeo) | |
1353 | { | |
1354 | if (t >= *timeo) { | |
8c42d637 | 1355 | int error = fxn(sdp->sd_vfs, 0); |
37b2c837 SW |
1356 | quotad_error(sdp, msg, error); |
1357 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1358 | } else { | |
1359 | *timeo -= t; | |
1360 | } | |
1361 | } | |
1362 | ||
813e0c46 SW |
1363 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1364 | { | |
1365 | struct gfs2_inode *ip; | |
1366 | ||
1367 | while(1) { | |
1368 | ip = NULL; | |
1369 | spin_lock(&sdp->sd_trunc_lock); | |
1370 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1371 | ip = list_entry(sdp->sd_trunc_list.next, | |
1372 | struct gfs2_inode, i_trunc_list); | |
1373 | list_del_init(&ip->i_trunc_list); | |
1374 | } | |
1375 | spin_unlock(&sdp->sd_trunc_lock); | |
1376 | if (ip == NULL) | |
1377 | return; | |
1378 | gfs2_glock_finish_truncate(ip); | |
1379 | } | |
1380 | } | |
1381 | ||
3d3c10f2 BM |
1382 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
1383 | if (!sdp->sd_statfs_force_sync) { | |
1384 | sdp->sd_statfs_force_sync = 1; | |
1385 | wake_up(&sdp->sd_quota_wait); | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | ||
37b2c837 SW |
1390 | /** |
1391 | * gfs2_quotad - Write cached quota changes into the quota file | |
1392 | * @sdp: Pointer to GFS2 superblock | |
1393 | * | |
1394 | */ | |
1395 | ||
1396 | int gfs2_quotad(void *data) | |
1397 | { | |
1398 | struct gfs2_sbd *sdp = data; | |
1399 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1400 | unsigned long statfs_timeo = 0; | |
1401 | unsigned long quotad_timeo = 0; | |
1402 | unsigned long t = 0; | |
1403 | DEFINE_WAIT(wait); | |
813e0c46 | 1404 | int empty; |
37b2c837 SW |
1405 | |
1406 | while (!kthread_should_stop()) { | |
1407 | ||
1408 | /* Update the master statfs file */ | |
3d3c10f2 BM |
1409 | if (sdp->sd_statfs_force_sync) { |
1410 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); | |
1411 | quotad_error(sdp, "statfs", error); | |
1412 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; | |
1413 | } | |
1414 | else | |
1415 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1416 | &statfs_timeo, | |
1417 | &tune->gt_statfs_quantum); | |
37b2c837 SW |
1418 | |
1419 | /* Update quota file */ | |
5fb324ad | 1420 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t, |
37b2c837 SW |
1421 | "ad_timeo, &tune->gt_quota_quantum); |
1422 | ||
813e0c46 SW |
1423 | /* Check for & recover partially truncated inodes */ |
1424 | quotad_check_trunc_list(sdp); | |
1425 | ||
37b2c837 SW |
1426 | if (freezing(current)) |
1427 | refrigerator(); | |
1428 | t = min(quotad_timeo, statfs_timeo); | |
1429 | ||
7fa5d20d | 1430 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
813e0c46 SW |
1431 | spin_lock(&sdp->sd_trunc_lock); |
1432 | empty = list_empty(&sdp->sd_trunc_list); | |
1433 | spin_unlock(&sdp->sd_trunc_lock); | |
3d3c10f2 | 1434 | if (empty && !sdp->sd_statfs_force_sync) |
813e0c46 SW |
1435 | t -= schedule_timeout(t); |
1436 | else | |
1437 | t = 0; | |
37b2c837 SW |
1438 | finish_wait(&sdp->sd_quota_wait, &wait); |
1439 | } | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1d371b5e SW |
1444 | static int gfs2_quota_get_xstate(struct super_block *sb, |
1445 | struct fs_quota_stat *fqs) | |
1446 | { | |
1447 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1448 | ||
1449 | memset(fqs, 0, sizeof(struct fs_quota_stat)); | |
1450 | fqs->qs_version = FS_QSTAT_VERSION; | |
ad6bb90f CH |
1451 | |
1452 | switch (sdp->sd_args.ar_quota) { | |
1453 | case GFS2_QUOTA_ON: | |
ade7ce31 | 1454 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
ad6bb90f CH |
1455 | /*FALLTHRU*/ |
1456 | case GFS2_QUOTA_ACCOUNT: | |
ade7ce31 | 1457 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
ad6bb90f CH |
1458 | break; |
1459 | case GFS2_QUOTA_OFF: | |
1460 | break; | |
1461 | } | |
1462 | ||
1d371b5e SW |
1463 | if (sdp->sd_quota_inode) { |
1464 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; | |
1465 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; | |
1466 | } | |
1467 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ | |
1468 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ | |
1469 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); | |
1470 | return 0; | |
1471 | } | |
1472 | ||
b9b2dd36 CH |
1473 | static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id, |
1474 | struct fs_disk_quota *fdq) | |
113d6b3c SW |
1475 | { |
1476 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1477 | struct gfs2_quota_lvb *qlvb; | |
1478 | struct gfs2_quota_data *qd; | |
1479 | struct gfs2_holder q_gh; | |
1480 | int error; | |
1481 | ||
1482 | memset(fdq, 0, sizeof(struct fs_disk_quota)); | |
1483 | ||
1484 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1485 | return -ESRCH; /* Crazy XFS error code */ | |
1486 | ||
1487 | if (type == USRQUOTA) | |
1488 | type = QUOTA_USER; | |
1489 | else if (type == GRPQUOTA) | |
1490 | type = QUOTA_GROUP; | |
1491 | else | |
1492 | return -EINVAL; | |
1493 | ||
1494 | error = qd_get(sdp, type, id, &qd); | |
1495 | if (error) | |
1496 | return error; | |
1497 | error = do_glock(qd, FORCE, &q_gh); | |
1498 | if (error) | |
1499 | goto out; | |
1500 | ||
1501 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; | |
1502 | fdq->d_version = FS_DQUOT_VERSION; | |
ade7ce31 | 1503 | fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
113d6b3c | 1504 | fdq->d_id = id; |
14870b45 AD |
1505 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
1506 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; | |
1507 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; | |
113d6b3c SW |
1508 | |
1509 | gfs2_glock_dq_uninit(&q_gh); | |
1510 | out: | |
1511 | qd_put(qd); | |
1512 | return error; | |
1513 | } | |
1514 | ||
e285c100 | 1515 | /* GFS2 only supports a subset of the XFS fields */ |
802ec9b6 | 1516 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
e285c100 | 1517 | |
c472b432 CH |
1518 | static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, |
1519 | struct fs_disk_quota *fdq) | |
e285c100 SW |
1520 | { |
1521 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1522 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); | |
1523 | struct gfs2_quota_data *qd; | |
1524 | struct gfs2_holder q_gh, i_gh; | |
1525 | unsigned int data_blocks, ind_blocks; | |
1526 | unsigned int blocks = 0; | |
1527 | int alloc_required; | |
1528 | struct gfs2_alloc *al; | |
1529 | loff_t offset; | |
1530 | int error; | |
1531 | ||
1532 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
1533 | return -ESRCH; /* Crazy XFS error code */ | |
1534 | ||
1535 | switch(type) { | |
1536 | case USRQUOTA: | |
1537 | type = QUOTA_USER; | |
ade7ce31 | 1538 | if (fdq->d_flags != FS_USER_QUOTA) |
e285c100 SW |
1539 | return -EINVAL; |
1540 | break; | |
1541 | case GRPQUOTA: | |
1542 | type = QUOTA_GROUP; | |
ade7ce31 | 1543 | if (fdq->d_flags != FS_GROUP_QUOTA) |
e285c100 SW |
1544 | return -EINVAL; |
1545 | break; | |
1546 | default: | |
1547 | return -EINVAL; | |
1548 | } | |
1549 | ||
1550 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) | |
1551 | return -EINVAL; | |
1552 | if (fdq->d_id != id) | |
1553 | return -EINVAL; | |
1554 | ||
1555 | error = qd_get(sdp, type, id, &qd); | |
1556 | if (error) | |
1557 | return error; | |
1558 | ||
1559 | mutex_lock(&ip->i_inode.i_mutex); | |
1560 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); | |
1561 | if (error) | |
1562 | goto out_put; | |
1563 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1564 | if (error) | |
1565 | goto out_q; | |
1566 | ||
1567 | /* Check for existing entry, if none then alloc new blocks */ | |
1568 | error = update_qd(sdp, qd); | |
1569 | if (error) | |
1570 | goto out_i; | |
1571 | ||
1572 | /* If nothing has changed, this is a no-op */ | |
1573 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && | |
14870b45 | 1574 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
e285c100 | 1575 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
802ec9b6 | 1576 | |
e285c100 | 1577 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
14870b45 | 1578 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
e285c100 | 1579 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
802ec9b6 AD |
1580 | |
1581 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && | |
1582 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) | |
1583 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; | |
1584 | ||
e285c100 SW |
1585 | if (fdq->d_fieldmask == 0) |
1586 | goto out_i; | |
1587 | ||
1588 | offset = qd2offset(qd); | |
461cb419 | 1589 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
e285c100 SW |
1590 | if (alloc_required) { |
1591 | al = gfs2_alloc_get(ip); | |
1592 | if (al == NULL) | |
1593 | goto out_i; | |
1594 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), | |
1595 | &data_blocks, &ind_blocks); | |
1596 | blocks = al->al_requested = 1 + data_blocks + ind_blocks; | |
1597 | error = gfs2_inplace_reserve(ip); | |
1598 | if (error) | |
1599 | goto out_alloc; | |
bf97b673 | 1600 | blocks += gfs2_rg_blocks(al); |
e285c100 SW |
1601 | } |
1602 | ||
1603 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0); | |
1604 | if (error) | |
1605 | goto out_release; | |
1606 | ||
1607 | /* Apply changes */ | |
1608 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); | |
1609 | ||
1610 | gfs2_trans_end(sdp); | |
1611 | out_release: | |
1612 | if (alloc_required) { | |
1613 | gfs2_inplace_release(ip); | |
1614 | out_alloc: | |
1615 | gfs2_alloc_put(ip); | |
1616 | } | |
1617 | out_i: | |
1618 | gfs2_glock_dq_uninit(&i_gh); | |
1619 | out_q: | |
1620 | gfs2_glock_dq_uninit(&q_gh); | |
1621 | out_put: | |
1622 | mutex_unlock(&ip->i_inode.i_mutex); | |
1623 | qd_put(qd); | |
1624 | return error; | |
1625 | } | |
1626 | ||
cc632e7f SW |
1627 | const struct quotactl_ops gfs2_quotactl_ops = { |
1628 | .quota_sync = gfs2_quota_sync, | |
1d371b5e | 1629 | .get_xstate = gfs2_quota_get_xstate, |
b9b2dd36 | 1630 | .get_dqblk = gfs2_get_dqblk, |
c472b432 | 1631 | .set_dqblk = gfs2_set_dqblk, |
cc632e7f | 1632 | }; |