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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. | |
18 | * Since quota tags are part of transactions, there is no need to a quota check | |
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> |
7d308590 | 48 | #include <linux/lm_interface.h> |
37b2c837 SW |
49 | #include <linux/kthread.h> |
50 | #include <linux/freezer.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" |
18ec7d5c | 64 | #include "ops_address.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_host { |
71 | u64 qu_limit; | |
72 | u64 qu_warn; | |
73 | s64 qu_value; | |
2d9a4bbf | 74 | u32 qu_ll_next; |
bb8d8a6f SW |
75 | }; |
76 | ||
77 | struct gfs2_quota_change_host { | |
78 | u64 qc_change; | |
79 | u32 qc_flags; /* GFS2_QCF_... */ | |
80 | u32 qc_id; | |
81 | }; | |
82 | ||
0a7ab79c AD |
83 | static LIST_HEAD(qd_lru_list); |
84 | static atomic_t qd_lru_count = ATOMIC_INIT(0); | |
85 | static spinlock_t qd_lru_lock = SPIN_LOCK_UNLOCKED; | |
86 | ||
87 | int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask) | |
88 | { | |
89 | struct gfs2_quota_data *qd; | |
90 | struct gfs2_sbd *sdp; | |
91 | ||
92 | if (nr == 0) | |
93 | goto out; | |
94 | ||
95 | if (!(gfp_mask & __GFP_FS)) | |
96 | return -1; | |
97 | ||
98 | spin_lock(&qd_lru_lock); | |
99 | while (nr && !list_empty(&qd_lru_list)) { | |
100 | qd = list_entry(qd_lru_list.next, | |
101 | struct gfs2_quota_data, qd_reclaim); | |
102 | sdp = qd->qd_gl->gl_sbd; | |
103 | ||
104 | /* Free from the filesystem-specific list */ | |
105 | list_del(&qd->qd_list); | |
106 | ||
0a7ab79c AD |
107 | gfs2_assert_warn(sdp, !qd->qd_change); |
108 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
109 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
110 | ||
111 | gfs2_lvb_unhold(qd->qd_gl); | |
0a7ab79c AD |
112 | atomic_dec(&sdp->sd_quota_count); |
113 | ||
114 | /* Delete it from the common reclaim list */ | |
115 | list_del_init(&qd->qd_reclaim); | |
116 | atomic_dec(&qd_lru_count); | |
117 | spin_unlock(&qd_lru_lock); | |
118 | kmem_cache_free(gfs2_quotad_cachep, qd); | |
119 | spin_lock(&qd_lru_lock); | |
120 | nr--; | |
121 | } | |
122 | spin_unlock(&qd_lru_lock); | |
123 | ||
124 | out: | |
125 | return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100; | |
126 | } | |
127 | ||
cd915493 | 128 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 129 | { |
cd915493 | 130 | u64 offset; |
b3b94faa | 131 | |
cd915493 | 132 | offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags); |
b3b94faa DT |
133 | offset *= sizeof(struct gfs2_quota); |
134 | ||
135 | return offset; | |
136 | } | |
137 | ||
cd915493 | 138 | static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
139 | struct gfs2_quota_data **qdp) |
140 | { | |
141 | struct gfs2_quota_data *qd; | |
142 | int error; | |
143 | ||
37b2c837 | 144 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
145 | if (!qd) |
146 | return -ENOMEM; | |
147 | ||
0a7ab79c | 148 | atomic_set(&qd->qd_count, 1); |
b3b94faa DT |
149 | qd->qd_id = id; |
150 | if (user) | |
151 | set_bit(QDF_USER, &qd->qd_flags); | |
152 | qd->qd_slot = -1; | |
0a7ab79c | 153 | INIT_LIST_HEAD(&qd->qd_reclaim); |
b3b94faa | 154 | |
cd915493 | 155 | error = gfs2_glock_get(sdp, 2 * (u64)id + !user, |
b3b94faa DT |
156 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
157 | if (error) | |
158 | goto fail; | |
159 | ||
160 | error = gfs2_lvb_hold(qd->qd_gl); | |
161 | gfs2_glock_put(qd->qd_gl); | |
162 | if (error) | |
163 | goto fail; | |
164 | ||
165 | *qdp = qd; | |
166 | ||
167 | return 0; | |
168 | ||
a91ea69f | 169 | fail: |
37b2c837 | 170 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
171 | return error; |
172 | } | |
173 | ||
cd915493 | 174 | static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create, |
b3b94faa DT |
175 | struct gfs2_quota_data **qdp) |
176 | { | |
177 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
178 | int error, found; | |
179 | ||
180 | *qdp = NULL; | |
181 | ||
182 | for (;;) { | |
183 | found = 0; | |
0a7ab79c | 184 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
185 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
186 | if (qd->qd_id == id && | |
187 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { | |
0a7ab79c AD |
188 | if (!atomic_read(&qd->qd_count) && |
189 | !list_empty(&qd->qd_reclaim)) { | |
190 | /* Remove it from reclaim list */ | |
191 | list_del_init(&qd->qd_reclaim); | |
192 | atomic_dec(&qd_lru_count); | |
193 | } | |
194 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
195 | found = 1; |
196 | break; | |
197 | } | |
198 | } | |
199 | ||
200 | if (!found) | |
201 | qd = NULL; | |
202 | ||
203 | if (!qd && new_qd) { | |
204 | qd = new_qd; | |
205 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
206 | atomic_inc(&sdp->sd_quota_count); | |
207 | new_qd = NULL; | |
208 | } | |
209 | ||
0a7ab79c | 210 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
211 | |
212 | if (qd || !create) { | |
213 | if (new_qd) { | |
214 | gfs2_lvb_unhold(new_qd->qd_gl); | |
37b2c837 | 215 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
216 | } |
217 | *qdp = qd; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | error = qd_alloc(sdp, user, id, &new_qd); | |
222 | if (error) | |
223 | return error; | |
224 | } | |
225 | } | |
226 | ||
227 | static void qd_hold(struct gfs2_quota_data *qd) | |
228 | { | |
229 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
0a7ab79c AD |
230 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
231 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
232 | } |
233 | ||
234 | static void qd_put(struct gfs2_quota_data *qd) | |
235 | { | |
0a7ab79c AD |
236 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
237 | /* Add to the reclaim list */ | |
238 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); | |
239 | atomic_inc(&qd_lru_count); | |
240 | spin_unlock(&qd_lru_lock); | |
241 | } | |
b3b94faa DT |
242 | } |
243 | ||
244 | static int slot_get(struct gfs2_quota_data *qd) | |
245 | { | |
246 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
247 | unsigned int c, o = 0, b; | |
248 | unsigned char byte = 0; | |
249 | ||
22077f57 | 250 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
251 | |
252 | if (qd->qd_slot_count++) { | |
22077f57 | 253 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
254 | return 0; |
255 | } | |
256 | ||
257 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
258 | for (o = 0; o < PAGE_SIZE; o++) { | |
259 | byte = sdp->sd_quota_bitmap[c][o]; | |
260 | if (byte != 0xFF) | |
261 | goto found; | |
262 | } | |
263 | ||
264 | goto fail; | |
265 | ||
a91ea69f | 266 | found: |
b3b94faa DT |
267 | for (b = 0; b < 8; b++) |
268 | if (!(byte & (1 << b))) | |
269 | break; | |
270 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
271 | ||
272 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
273 | goto fail; | |
274 | ||
275 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
276 | ||
22077f57 | 277 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
278 | |
279 | return 0; | |
280 | ||
a91ea69f | 281 | fail: |
b3b94faa | 282 | qd->qd_slot_count--; |
22077f57 | 283 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
284 | return -ENOSPC; |
285 | } | |
286 | ||
287 | static void slot_hold(struct gfs2_quota_data *qd) | |
288 | { | |
289 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
290 | ||
22077f57 | 291 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
292 | gfs2_assert(sdp, qd->qd_slot_count); |
293 | qd->qd_slot_count++; | |
22077f57 | 294 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
295 | } |
296 | ||
297 | static void slot_put(struct gfs2_quota_data *qd) | |
298 | { | |
299 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
300 | ||
22077f57 | 301 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
302 | gfs2_assert(sdp, qd->qd_slot_count); |
303 | if (!--qd->qd_slot_count) { | |
304 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
305 | qd->qd_slot = -1; | |
306 | } | |
22077f57 | 307 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
308 | } |
309 | ||
310 | static int bh_get(struct gfs2_quota_data *qd) | |
311 | { | |
312 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 313 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 314 | unsigned int block, offset; |
b3b94faa DT |
315 | struct buffer_head *bh; |
316 | int error; | |
23591256 | 317 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 318 | |
f55ab26a | 319 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
320 | |
321 | if (qd->qd_bh_count++) { | |
f55ab26a | 322 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
323 | return 0; |
324 | } | |
325 | ||
326 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 327 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 328 | |
23591256 | 329 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 330 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
331 | if (error) |
332 | goto fail; | |
7276b3b0 | 333 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
334 | if (error) |
335 | goto fail; | |
336 | error = -EIO; | |
337 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
338 | goto fail_brelse; | |
339 | ||
340 | qd->qd_bh = bh; | |
341 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
342 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
343 | offset * sizeof(struct gfs2_quota_change)); | |
344 | ||
2e95b665 | 345 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
346 | |
347 | return 0; | |
348 | ||
a91ea69f | 349 | fail_brelse: |
b3b94faa | 350 | brelse(bh); |
a91ea69f | 351 | fail: |
b3b94faa | 352 | qd->qd_bh_count--; |
f55ab26a | 353 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
354 | return error; |
355 | } | |
356 | ||
357 | static void bh_put(struct gfs2_quota_data *qd) | |
358 | { | |
359 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
360 | ||
f55ab26a | 361 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
362 | gfs2_assert(sdp, qd->qd_bh_count); |
363 | if (!--qd->qd_bh_count) { | |
364 | brelse(qd->qd_bh); | |
365 | qd->qd_bh = NULL; | |
366 | qd->qd_bh_qc = NULL; | |
367 | } | |
f55ab26a | 368 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
369 | } |
370 | ||
371 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
372 | { | |
373 | struct gfs2_quota_data *qd = NULL; | |
374 | int error; | |
375 | int found = 0; | |
376 | ||
377 | *qdp = NULL; | |
378 | ||
379 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
380 | return 0; | |
381 | ||
0a7ab79c | 382 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
383 | |
384 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
385 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
386 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
387 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
388 | continue; | |
389 | ||
390 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
391 | ||
392 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
393 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
394 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
395 | qd->qd_change_sync = qd->qd_change; |
396 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
397 | qd->qd_slot_count++; | |
398 | found = 1; | |
399 | ||
400 | break; | |
401 | } | |
402 | ||
403 | if (!found) | |
404 | qd = NULL; | |
405 | ||
0a7ab79c | 406 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
407 | |
408 | if (qd) { | |
409 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
410 | error = bh_get(qd); | |
411 | if (error) { | |
412 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
413 | slot_put(qd); | |
414 | qd_put(qd); | |
415 | return error; | |
416 | } | |
417 | } | |
418 | ||
419 | *qdp = qd; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | static int qd_trylock(struct gfs2_quota_data *qd) | |
425 | { | |
426 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
427 | ||
428 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
429 | return 0; | |
430 | ||
0a7ab79c | 431 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
432 | |
433 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
434 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
0a7ab79c | 435 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
436 | return 0; |
437 | } | |
438 | ||
439 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
440 | ||
441 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
0a7ab79c AD |
442 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
443 | atomic_inc(&qd->qd_count); | |
b3b94faa DT |
444 | qd->qd_change_sync = qd->qd_change; |
445 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
446 | qd->qd_slot_count++; | |
447 | ||
0a7ab79c | 448 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
449 | |
450 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
451 | if (bh_get(qd)) { | |
452 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
453 | slot_put(qd); | |
454 | qd_put(qd); | |
455 | return 0; | |
456 | } | |
457 | ||
458 | return 1; | |
459 | } | |
460 | ||
461 | static void qd_unlock(struct gfs2_quota_data *qd) | |
462 | { | |
568f4c96 SW |
463 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
464 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
465 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
466 | bh_put(qd); | |
467 | slot_put(qd); | |
468 | qd_put(qd); | |
469 | } | |
470 | ||
cd915493 | 471 | static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, int create, |
b3b94faa DT |
472 | struct gfs2_quota_data **qdp) |
473 | { | |
474 | int error; | |
475 | ||
476 | error = qd_get(sdp, user, id, create, qdp); | |
477 | if (error) | |
478 | return error; | |
479 | ||
480 | error = slot_get(*qdp); | |
481 | if (error) | |
482 | goto fail; | |
483 | ||
484 | error = bh_get(*qdp); | |
485 | if (error) | |
486 | goto fail_slot; | |
487 | ||
488 | return 0; | |
489 | ||
a91ea69f | 490 | fail_slot: |
b3b94faa | 491 | slot_put(*qdp); |
a91ea69f | 492 | fail: |
b3b94faa DT |
493 | qd_put(*qdp); |
494 | return error; | |
495 | } | |
496 | ||
497 | static void qdsb_put(struct gfs2_quota_data *qd) | |
498 | { | |
499 | bh_put(qd); | |
500 | slot_put(qd); | |
501 | qd_put(qd); | |
502 | } | |
503 | ||
cd915493 | 504 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 505 | { |
feaa7bba | 506 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 507 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
508 | struct gfs2_quota_data **qd = al->al_qd; |
509 | int error; | |
510 | ||
511 | if (gfs2_assert_warn(sdp, !al->al_qd_num) || | |
512 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) | |
513 | return -EIO; | |
514 | ||
515 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
516 | return 0; | |
517 | ||
2933f925 | 518 | error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, CREATE, qd); |
b3b94faa DT |
519 | if (error) |
520 | goto out; | |
521 | al->al_qd_num++; | |
522 | qd++; | |
523 | ||
2933f925 | 524 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, CREATE, qd); |
b3b94faa DT |
525 | if (error) |
526 | goto out; | |
527 | al->al_qd_num++; | |
528 | qd++; | |
529 | ||
2933f925 | 530 | if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
b3b94faa DT |
531 | error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd); |
532 | if (error) | |
533 | goto out; | |
534 | al->al_qd_num++; | |
535 | qd++; | |
536 | } | |
537 | ||
2933f925 | 538 | if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
b3b94faa DT |
539 | error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd); |
540 | if (error) | |
541 | goto out; | |
542 | al->al_qd_num++; | |
543 | qd++; | |
544 | } | |
545 | ||
a91ea69f | 546 | out: |
b3b94faa DT |
547 | if (error) |
548 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
549 | return error; |
550 | } | |
551 | ||
552 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
553 | { | |
feaa7bba | 554 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 555 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
556 | unsigned int x; |
557 | ||
558 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); | |
559 | ||
560 | for (x = 0; x < al->al_qd_num; x++) { | |
561 | qdsb_put(al->al_qd[x]); | |
562 | al->al_qd[x] = NULL; | |
563 | } | |
564 | al->al_qd_num = 0; | |
565 | } | |
566 | ||
567 | static int sort_qd(const void *a, const void *b) | |
568 | { | |
48fac179 SW |
569 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
570 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa DT |
571 | |
572 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != | |
573 | !test_bit(QDF_USER, &qd_b->qd_flags)) { | |
574 | if (test_bit(QDF_USER, &qd_a->qd_flags)) | |
48fac179 | 575 | return -1; |
b3b94faa | 576 | else |
48fac179 | 577 | return 1; |
b3b94faa | 578 | } |
48fac179 SW |
579 | if (qd_a->qd_id < qd_b->qd_id) |
580 | return -1; | |
581 | if (qd_a->qd_id > qd_b->qd_id) | |
582 | return 1; | |
b3b94faa | 583 | |
48fac179 | 584 | return 0; |
b3b94faa DT |
585 | } |
586 | ||
cd915493 | 587 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
588 | { |
589 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 590 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 591 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 592 | s64 x; |
b3b94faa | 593 | |
f55ab26a | 594 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 595 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
596 | |
597 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
598 | qc->qc_change = 0; | |
599 | qc->qc_flags = 0; | |
600 | if (test_bit(QDF_USER, &qd->qd_flags)) | |
601 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); | |
602 | qc->qc_id = cpu_to_be32(qd->qd_id); | |
603 | } | |
604 | ||
b44b84d7 | 605 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
606 | qc->qc_change = cpu_to_be64(x); |
607 | ||
22077f57 | 608 | spin_lock(&qd_lru_lock); |
b3b94faa | 609 | qd->qd_change = x; |
22077f57 | 610 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
611 | |
612 | if (!x) { | |
613 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
614 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
615 | qc->qc_flags = 0; | |
616 | qc->qc_id = 0; | |
617 | slot_put(qd); | |
618 | qd_put(qd); | |
619 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
620 | qd_hold(qd); | |
621 | slot_hold(qd); | |
622 | } | |
907b9bce | 623 | |
f55ab26a | 624 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
625 | } |
626 | ||
bb8d8a6f SW |
627 | static void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf) |
628 | { | |
629 | const struct gfs2_quota *str = buf; | |
630 | ||
631 | qu->qu_limit = be64_to_cpu(str->qu_limit); | |
632 | qu->qu_warn = be64_to_cpu(str->qu_warn); | |
633 | qu->qu_value = be64_to_cpu(str->qu_value); | |
2d9a4bbf | 634 | qu->qu_ll_next = be32_to_cpu(str->qu_ll_next); |
bb8d8a6f SW |
635 | } |
636 | ||
637 | static void gfs2_quota_out(const struct gfs2_quota_host *qu, void *buf) | |
638 | { | |
639 | struct gfs2_quota *str = buf; | |
640 | ||
641 | str->qu_limit = cpu_to_be64(qu->qu_limit); | |
642 | str->qu_warn = cpu_to_be64(qu->qu_warn); | |
643 | str->qu_value = cpu_to_be64(qu->qu_value); | |
2d9a4bbf | 644 | str->qu_ll_next = cpu_to_be32(qu->qu_ll_next); |
bb8d8a6f SW |
645 | memset(&str->qu_reserved, 0, sizeof(str->qu_reserved)); |
646 | } | |
647 | ||
18ec7d5c SW |
648 | /** |
649 | * gfs2_adjust_quota | |
650 | * | |
651 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
652 | * in turn mostly borrowed from ext3 | |
653 | */ | |
654 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, | |
cd915493 | 655 | s64 change, struct gfs2_quota_data *qd) |
18ec7d5c | 656 | { |
feaa7bba | 657 | struct inode *inode = &ip->i_inode; |
18ec7d5c SW |
658 | struct address_space *mapping = inode->i_mapping; |
659 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 660 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c SW |
661 | unsigned blocksize, iblock, pos; |
662 | struct buffer_head *bh; | |
663 | struct page *page; | |
664 | void *kaddr; | |
1990e917 AD |
665 | char *ptr; |
666 | struct gfs2_quota_host qp; | |
e9fc2aa0 | 667 | s64 value; |
18ec7d5c SW |
668 | int err = -EIO; |
669 | ||
20b95bf2 | 670 | if (gfs2_is_stuffed(ip)) |
0fd53554 | 671 | gfs2_unstuff_dinode(ip, NULL); |
20b95bf2 | 672 | |
18ec7d5c SW |
673 | page = grab_cache_page(mapping, index); |
674 | if (!page) | |
675 | return -ENOMEM; | |
676 | ||
677 | blocksize = inode->i_sb->s_blocksize; | |
678 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
679 | ||
680 | if (!page_has_buffers(page)) | |
681 | create_empty_buffers(page, blocksize, 0); | |
682 | ||
683 | bh = page_buffers(page); | |
684 | pos = blocksize; | |
685 | while (offset >= pos) { | |
686 | bh = bh->b_this_page; | |
687 | iblock++; | |
688 | pos += blocksize; | |
689 | } | |
690 | ||
691 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 692 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c SW |
693 | if (!buffer_mapped(bh)) |
694 | goto unlock; | |
695 | } | |
696 | ||
697 | if (PageUptodate(page)) | |
698 | set_buffer_uptodate(bh); | |
699 | ||
700 | if (!buffer_uptodate(bh)) { | |
2e565bb6 | 701 | ll_rw_block(READ_META, 1, &bh); |
18ec7d5c SW |
702 | wait_on_buffer(bh); |
703 | if (!buffer_uptodate(bh)) | |
704 | goto unlock; | |
705 | } | |
706 | ||
707 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
708 | ||
709 | kaddr = kmap_atomic(page, KM_USER0); | |
48fac179 | 710 | ptr = kaddr + offset; |
1990e917 AD |
711 | gfs2_quota_in(&qp, ptr); |
712 | qp.qu_value += change; | |
713 | value = qp.qu_value; | |
714 | gfs2_quota_out(&qp, ptr); | |
18ec7d5c SW |
715 | flush_dcache_page(page); |
716 | kunmap_atomic(kaddr, KM_USER0); | |
717 | err = 0; | |
718 | qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC); | |
18ec7d5c | 719 | qd->qd_qb.qb_value = cpu_to_be64(value); |
2a87ab08 AD |
720 | ((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_magic = cpu_to_be32(GFS2_MAGIC); |
721 | ((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_value = cpu_to_be64(value); | |
18ec7d5c SW |
722 | unlock: |
723 | unlock_page(page); | |
724 | page_cache_release(page); | |
725 | return err; | |
726 | } | |
727 | ||
b3b94faa DT |
728 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
729 | { | |
730 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 731 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
732 | unsigned int data_blocks, ind_blocks; |
733 | struct gfs2_holder *ghs, i_gh; | |
734 | unsigned int qx, x; | |
735 | struct gfs2_quota_data *qd; | |
f42faf4f | 736 | loff_t offset; |
20b95bf2 | 737 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
738 | struct gfs2_alloc *al = NULL; |
739 | int error; | |
740 | ||
741 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), | |
742 | &data_blocks, &ind_blocks); | |
743 | ||
16c5f06f | 744 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
745 | if (!ghs) |
746 | return -ENOMEM; | |
747 | ||
748 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
749 | for (qx = 0; qx < num_qd; qx++) { | |
750 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, | |
751 | LM_ST_EXCLUSIVE, | |
752 | GL_NOCACHE, &ghs[qx]); | |
753 | if (error) | |
754 | goto out; | |
755 | } | |
756 | ||
757 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
758 | if (error) | |
759 | goto out; | |
760 | ||
761 | for (x = 0; x < num_qd; x++) { | |
762 | int alloc_required; | |
763 | ||
764 | offset = qd2offset(qda[x]); | |
765 | error = gfs2_write_alloc_required(ip, offset, | |
766 | sizeof(struct gfs2_quota), | |
767 | &alloc_required); | |
768 | if (error) | |
769 | goto out_gunlock; | |
770 | if (alloc_required) | |
771 | nalloc++; | |
772 | } | |
773 | ||
20b95bf2 AD |
774 | al = gfs2_alloc_get(ip); |
775 | if (!al) { | |
776 | error = -ENOMEM; | |
777 | goto out_gunlock; | |
778 | } | |
779 | /* | |
780 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
781 | * block to the reservation unconditionally. If the inode | |
782 | * doesn't need unstuffing, the block will be released to the | |
783 | * rgrp since it won't be allocated during the transaction | |
784 | */ | |
785 | al->al_requested = 1; | |
786 | /* +1 in the end for block requested above for unstuffing */ | |
787 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 1; | |
b3b94faa | 788 | |
20b95bf2 AD |
789 | if (nalloc) |
790 | al->al_requested += nalloc * (data_blocks + ind_blocks); | |
791 | error = gfs2_inplace_reserve(ip); | |
792 | if (error) | |
793 | goto out_alloc; | |
b3b94faa | 794 | |
20b95bf2 AD |
795 | if (nalloc) |
796 | blocks += al->al_rgd->rd_length + nalloc * ind_blocks + RES_STATFS; | |
797 | ||
798 | error = gfs2_trans_begin(sdp, blocks, 0); | |
799 | if (error) | |
800 | goto out_ipres; | |
b3b94faa DT |
801 | |
802 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
803 | qd = qda[x]; |
804 | offset = qd2offset(qd); | |
18ec7d5c | 805 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, |
568f4c96 | 806 | (struct gfs2_quota_data *) |
2a87ab08 | 807 | qd); |
18ec7d5c | 808 | if (error) |
b3b94faa | 809 | goto out_end_trans; |
b3b94faa DT |
810 | |
811 | do_qc(qd, -qd->qd_change_sync); | |
b3b94faa DT |
812 | } |
813 | ||
814 | error = 0; | |
815 | ||
a91ea69f | 816 | out_end_trans: |
b3b94faa | 817 | gfs2_trans_end(sdp); |
a91ea69f | 818 | out_ipres: |
20b95bf2 | 819 | gfs2_inplace_release(ip); |
a91ea69f | 820 | out_alloc: |
20b95bf2 | 821 | gfs2_alloc_put(ip); |
a91ea69f | 822 | out_gunlock: |
b3b94faa | 823 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 824 | out: |
b3b94faa DT |
825 | while (qx--) |
826 | gfs2_glock_dq_uninit(&ghs[qx]); | |
827 | kfree(ghs); | |
b09e593d | 828 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
829 | return error; |
830 | } | |
831 | ||
832 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, | |
833 | struct gfs2_holder *q_gh) | |
834 | { | |
835 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 836 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 837 | struct gfs2_holder i_gh; |
b5bc9e8b | 838 | struct gfs2_quota_host q; |
b3b94faa DT |
839 | char buf[sizeof(struct gfs2_quota)]; |
840 | int error; | |
e9fc2aa0 | 841 | struct gfs2_quota_lvb *qlvb; |
b3b94faa | 842 | |
a91ea69f | 843 | restart: |
b3b94faa DT |
844 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
845 | if (error) | |
846 | return error; | |
847 | ||
e9fc2aa0 | 848 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
b3b94faa | 849 | |
e9fc2aa0 | 850 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
f42faf4f | 851 | loff_t pos; |
b3b94faa DT |
852 | gfs2_glock_dq_uninit(q_gh); |
853 | error = gfs2_glock_nq_init(qd->qd_gl, | |
0a7ab79c AD |
854 | LM_ST_EXCLUSIVE, GL_NOCACHE, |
855 | q_gh); | |
b3b94faa DT |
856 | if (error) |
857 | return error; | |
858 | ||
e9fc2aa0 | 859 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
860 | if (error) |
861 | goto fail; | |
862 | ||
863 | memset(buf, 0, sizeof(struct gfs2_quota)); | |
f42faf4f | 864 | pos = qd2offset(qd); |
51ff87bd SW |
865 | error = gfs2_internal_read(ip, NULL, buf, &pos, |
866 | sizeof(struct gfs2_quota)); | |
b3b94faa DT |
867 | if (error < 0) |
868 | goto fail_gunlock; | |
869 | ||
870 | gfs2_glock_dq_uninit(&i_gh); | |
871 | ||
872 | gfs2_quota_in(&q, buf); | |
e9fc2aa0 SW |
873 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
874 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); | |
875 | qlvb->__pad = 0; | |
876 | qlvb->qb_limit = cpu_to_be64(q.qu_limit); | |
877 | qlvb->qb_warn = cpu_to_be64(q.qu_warn); | |
878 | qlvb->qb_value = cpu_to_be64(q.qu_value); | |
879 | qd->qd_qb = *qlvb; | |
b3b94faa DT |
880 | |
881 | if (gfs2_glock_is_blocking(qd->qd_gl)) { | |
882 | gfs2_glock_dq_uninit(q_gh); | |
883 | force_refresh = 0; | |
884 | goto restart; | |
885 | } | |
886 | } | |
887 | ||
888 | return 0; | |
889 | ||
a91ea69f | 890 | fail_gunlock: |
b3b94faa | 891 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 892 | fail: |
b3b94faa | 893 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
894 | return error; |
895 | } | |
896 | ||
cd915493 | 897 | int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 898 | { |
feaa7bba | 899 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 900 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
901 | unsigned int x; |
902 | int error = 0; | |
903 | ||
904 | gfs2_quota_hold(ip, uid, gid); | |
905 | ||
906 | if (capable(CAP_SYS_RESOURCE) || | |
907 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
908 | return 0; | |
909 | ||
910 | sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *), | |
911 | sort_qd, NULL); | |
912 | ||
913 | for (x = 0; x < al->al_qd_num; x++) { | |
914 | error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]); | |
915 | if (error) | |
916 | break; | |
917 | } | |
918 | ||
919 | if (!error) | |
920 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
921 | else { | |
922 | while (x--) | |
923 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
924 | gfs2_quota_unhold(ip); | |
925 | } | |
926 | ||
927 | return error; | |
928 | } | |
929 | ||
930 | static int need_sync(struct gfs2_quota_data *qd) | |
931 | { | |
932 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
933 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 934 | s64 value; |
b3b94faa DT |
935 | unsigned int num, den; |
936 | int do_sync = 1; | |
937 | ||
938 | if (!qd->qd_qb.qb_limit) | |
939 | return 0; | |
940 | ||
22077f57 | 941 | spin_lock(&qd_lru_lock); |
b3b94faa | 942 | value = qd->qd_change; |
22077f57 | 943 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
944 | |
945 | spin_lock(>->gt_spin); | |
946 | num = gt->gt_quota_scale_num; | |
947 | den = gt->gt_quota_scale_den; | |
948 | spin_unlock(>->gt_spin); | |
949 | ||
950 | if (value < 0) | |
951 | do_sync = 0; | |
e9fc2aa0 SW |
952 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
953 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
954 | do_sync = 0; |
955 | else { | |
956 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 957 | value = div_s64(value, den); |
e9fc2aa0 | 958 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 959 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
960 | do_sync = 0; |
961 | } | |
962 | ||
963 | return do_sync; | |
964 | } | |
965 | ||
966 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
967 | { | |
6dbd8224 | 968 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
969 | struct gfs2_quota_data *qda[4]; |
970 | unsigned int count = 0; | |
971 | unsigned int x; | |
972 | ||
973 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
974 | goto out; | |
975 | ||
976 | for (x = 0; x < al->al_qd_num; x++) { | |
977 | struct gfs2_quota_data *qd; | |
978 | int sync; | |
979 | ||
980 | qd = al->al_qd[x]; | |
981 | sync = need_sync(qd); | |
982 | ||
983 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
984 | ||
985 | if (sync && qd_trylock(qd)) | |
986 | qda[count++] = qd; | |
987 | } | |
988 | ||
989 | if (count) { | |
990 | do_sync(count, qda); | |
991 | for (x = 0; x < count; x++) | |
992 | qd_unlock(qda[x]); | |
993 | } | |
994 | ||
a91ea69f | 995 | out: |
b3b94faa DT |
996 | gfs2_quota_unhold(ip); |
997 | } | |
998 | ||
999 | #define MAX_LINE 256 | |
1000 | ||
1001 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
1002 | { | |
1003 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 1004 | |
02630a12 SW |
1005 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\r\n", |
1006 | sdp->sd_fsname, type, | |
1007 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", | |
1008 | qd->qd_id); | |
b3b94faa DT |
1009 | |
1010 | return 0; | |
1011 | } | |
1012 | ||
cd915493 | 1013 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 1014 | { |
feaa7bba | 1015 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1016 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa | 1017 | struct gfs2_quota_data *qd; |
cd915493 | 1018 | s64 value; |
b3b94faa DT |
1019 | unsigned int x; |
1020 | int error = 0; | |
1021 | ||
1022 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
1023 | return 0; | |
1024 | ||
1025 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
1026 | return 0; | |
1027 | ||
1028 | for (x = 0; x < al->al_qd_num; x++) { | |
1029 | qd = al->al_qd[x]; | |
1030 | ||
1031 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1032 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) | |
1033 | continue; | |
1034 | ||
e9fc2aa0 | 1035 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
22077f57 | 1036 | spin_lock(&qd_lru_lock); |
b3b94faa | 1037 | value += qd->qd_change; |
22077f57 | 1038 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1039 | |
cd915493 | 1040 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa DT |
1041 | print_message(qd, "exceeded"); |
1042 | error = -EDQUOT; | |
1043 | break; | |
e9fc2aa0 | 1044 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 1045 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 1046 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
1047 | gfs2_tune_get(sdp, |
1048 | gt_quota_warn_period) * HZ)) { | |
b3b94faa DT |
1049 | error = print_message(qd, "warning"); |
1050 | qd->qd_last_warn = jiffies; | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | return error; | |
1055 | } | |
1056 | ||
cd915493 SW |
1057 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1058 | u32 uid, u32 gid) | |
b3b94faa | 1059 | { |
6dbd8224 | 1060 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1061 | struct gfs2_quota_data *qd; |
1062 | unsigned int x; | |
b3b94faa | 1063 | |
feaa7bba | 1064 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1065 | return; |
383f01fb | 1066 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1067 | return; |
1068 | ||
1069 | for (x = 0; x < al->al_qd_num; x++) { | |
1070 | qd = al->al_qd[x]; | |
1071 | ||
1072 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1073 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { | |
1074 | do_qc(qd, change); | |
b3b94faa DT |
1075 | } |
1076 | } | |
1077 | } | |
1078 | ||
1079 | int gfs2_quota_sync(struct gfs2_sbd *sdp) | |
1080 | { | |
1081 | struct gfs2_quota_data **qda; | |
1082 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1083 | unsigned int num_qd; | |
1084 | unsigned int x; | |
1085 | int error = 0; | |
1086 | ||
1087 | sdp->sd_quota_sync_gen++; | |
1088 | ||
1089 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1090 | if (!qda) | |
1091 | return -ENOMEM; | |
1092 | ||
1093 | do { | |
1094 | num_qd = 0; | |
1095 | ||
1096 | for (;;) { | |
1097 | error = qd_fish(sdp, qda + num_qd); | |
1098 | if (error || !qda[num_qd]) | |
1099 | break; | |
1100 | if (++num_qd == max_qd) | |
1101 | break; | |
1102 | } | |
1103 | ||
1104 | if (num_qd) { | |
1105 | if (!error) | |
1106 | error = do_sync(num_qd, qda); | |
1107 | if (!error) | |
1108 | for (x = 0; x < num_qd; x++) | |
1109 | qda[x]->qd_sync_gen = | |
1110 | sdp->sd_quota_sync_gen; | |
1111 | ||
1112 | for (x = 0; x < num_qd; x++) | |
1113 | qd_unlock(qda[x]); | |
1114 | } | |
1115 | } while (!error && num_qd == max_qd); | |
1116 | ||
1117 | kfree(qda); | |
1118 | ||
1119 | return error; | |
1120 | } | |
1121 | ||
cd915493 | 1122 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) |
b3b94faa DT |
1123 | { |
1124 | struct gfs2_quota_data *qd; | |
1125 | struct gfs2_holder q_gh; | |
1126 | int error; | |
1127 | ||
1128 | error = qd_get(sdp, user, id, CREATE, &qd); | |
1129 | if (error) | |
1130 | return error; | |
1131 | ||
1132 | error = do_glock(qd, FORCE, &q_gh); | |
1133 | if (!error) | |
1134 | gfs2_glock_dq_uninit(&q_gh); | |
1135 | ||
1136 | qd_put(qd); | |
1137 | ||
1138 | return error; | |
1139 | } | |
1140 | ||
bb8d8a6f SW |
1141 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1142 | { | |
1143 | const struct gfs2_quota_change *str = buf; | |
1144 | ||
1145 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1146 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
1147 | qc->qc_id = be32_to_cpu(str->qc_id); | |
1148 | } | |
1149 | ||
b3b94faa DT |
1150 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1151 | { | |
feaa7bba | 1152 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
c9e98886 | 1153 | unsigned int blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; |
b3b94faa DT |
1154 | unsigned int x, slot = 0; |
1155 | unsigned int found = 0; | |
cd915493 SW |
1156 | u64 dblock; |
1157 | u32 extlen = 0; | |
b3b94faa DT |
1158 | int error; |
1159 | ||
c9e98886 SW |
1160 | if (!ip->i_disksize || ip->i_disksize > (64 << 20) || |
1161 | ip->i_disksize & (sdp->sd_sb.sb_bsize - 1)) { | |
b3b94faa | 1162 | gfs2_consist_inode(ip); |
907b9bce | 1163 | return -EIO; |
b3b94faa DT |
1164 | } |
1165 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; | |
5c676f6d | 1166 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1167 | |
1168 | error = -ENOMEM; | |
1169 | ||
1170 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1171 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1172 | if (!sdp->sd_quota_bitmap) |
1173 | return error; | |
1174 | ||
1175 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1176 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1177 | if (!sdp->sd_quota_bitmap[x]) |
1178 | goto fail; | |
1179 | } | |
1180 | ||
1181 | for (x = 0; x < blocks; x++) { | |
1182 | struct buffer_head *bh; | |
1183 | unsigned int y; | |
1184 | ||
1185 | if (!extlen) { | |
1186 | int new = 0; | |
feaa7bba | 1187 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1188 | if (error) |
1189 | goto fail; | |
1190 | } | |
b3b94faa | 1191 | error = -EIO; |
7276b3b0 SW |
1192 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1193 | if (!bh) | |
1194 | goto fail; | |
b3b94faa DT |
1195 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1196 | brelse(bh); | |
1197 | goto fail; | |
1198 | } | |
1199 | ||
7276b3b0 | 1200 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1201 | y++, slot++) { |
b62f963e | 1202 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1203 | struct gfs2_quota_data *qd; |
1204 | ||
1205 | gfs2_quota_change_in(&qc, bh->b_data + | |
1206 | sizeof(struct gfs2_meta_header) + | |
1207 | y * sizeof(struct gfs2_quota_change)); | |
1208 | if (!qc.qc_change) | |
1209 | continue; | |
1210 | ||
1211 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), | |
1212 | qc.qc_id, &qd); | |
1213 | if (error) { | |
1214 | brelse(bh); | |
1215 | goto fail; | |
1216 | } | |
1217 | ||
1218 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1219 | qd->qd_change = qc.qc_change; | |
1220 | qd->qd_slot = slot; | |
1221 | qd->qd_slot_count = 1; | |
b3b94faa | 1222 | |
0a7ab79c | 1223 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1224 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
1225 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1226 | atomic_inc(&sdp->sd_quota_count); | |
0a7ab79c | 1227 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1228 | |
1229 | found++; | |
1230 | } | |
1231 | ||
1232 | brelse(bh); | |
1233 | dblock++; | |
1234 | extlen--; | |
1235 | } | |
1236 | ||
1237 | if (found) | |
1238 | fs_info(sdp, "found %u quota changes\n", found); | |
1239 | ||
1240 | return 0; | |
1241 | ||
a91ea69f | 1242 | fail: |
b3b94faa DT |
1243 | gfs2_quota_cleanup(sdp); |
1244 | return error; | |
1245 | } | |
1246 | ||
b3b94faa DT |
1247 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
1248 | { | |
1249 | struct list_head *head = &sdp->sd_quota_list; | |
1250 | struct gfs2_quota_data *qd; | |
1251 | unsigned int x; | |
1252 | ||
0a7ab79c | 1253 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1254 | while (!list_empty(head)) { |
1255 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1256 | ||
0a7ab79c AD |
1257 | if (atomic_read(&qd->qd_count) > 1 || |
1258 | (atomic_read(&qd->qd_count) && | |
1259 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
0a7ab79c AD |
1260 | list_move(&qd->qd_list, head); |
1261 | spin_unlock(&qd_lru_lock); | |
b3b94faa | 1262 | schedule(); |
0a7ab79c | 1263 | spin_lock(&qd_lru_lock); |
b3b94faa DT |
1264 | continue; |
1265 | } | |
1266 | ||
1267 | list_del(&qd->qd_list); | |
0a7ab79c AD |
1268 | /* Also remove if this qd exists in the reclaim list */ |
1269 | if (!list_empty(&qd->qd_reclaim)) { | |
1270 | list_del_init(&qd->qd_reclaim); | |
1271 | atomic_dec(&qd_lru_count); | |
1272 | } | |
b3b94faa | 1273 | atomic_dec(&sdp->sd_quota_count); |
0a7ab79c | 1274 | spin_unlock(&qd_lru_lock); |
b3b94faa | 1275 | |
0a7ab79c | 1276 | if (!atomic_read(&qd->qd_count)) { |
b3b94faa DT |
1277 | gfs2_assert_warn(sdp, !qd->qd_change); |
1278 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1279 | } else | |
1280 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1281 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1282 | ||
1283 | gfs2_lvb_unhold(qd->qd_gl); | |
37b2c837 | 1284 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa | 1285 | |
0a7ab79c | 1286 | spin_lock(&qd_lru_lock); |
b3b94faa | 1287 | } |
0a7ab79c | 1288 | spin_unlock(&qd_lru_lock); |
b3b94faa DT |
1289 | |
1290 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1291 | ||
1292 | if (sdp->sd_quota_bitmap) { | |
1293 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1294 | kfree(sdp->sd_quota_bitmap[x]); | |
1295 | kfree(sdp->sd_quota_bitmap); | |
1296 | } | |
1297 | } | |
1298 | ||
37b2c837 SW |
1299 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1300 | { | |
1301 | if (error == 0 || error == -EROFS) | |
1302 | return; | |
1303 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1304 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1305 | } | |
1306 | ||
1307 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
1308 | int (*fxn)(struct gfs2_sbd *sdp), | |
1309 | unsigned long t, unsigned long *timeo, | |
1310 | unsigned int *new_timeo) | |
1311 | { | |
1312 | if (t >= *timeo) { | |
1313 | int error = fxn(sdp); | |
1314 | quotad_error(sdp, msg, error); | |
1315 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1316 | } else { | |
1317 | *timeo -= t; | |
1318 | } | |
1319 | } | |
1320 | ||
813e0c46 SW |
1321 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
1322 | { | |
1323 | struct gfs2_inode *ip; | |
1324 | ||
1325 | while(1) { | |
1326 | ip = NULL; | |
1327 | spin_lock(&sdp->sd_trunc_lock); | |
1328 | if (!list_empty(&sdp->sd_trunc_list)) { | |
1329 | ip = list_entry(sdp->sd_trunc_list.next, | |
1330 | struct gfs2_inode, i_trunc_list); | |
1331 | list_del_init(&ip->i_trunc_list); | |
1332 | } | |
1333 | spin_unlock(&sdp->sd_trunc_lock); | |
1334 | if (ip == NULL) | |
1335 | return; | |
1336 | gfs2_glock_finish_truncate(ip); | |
1337 | } | |
1338 | } | |
1339 | ||
37b2c837 SW |
1340 | /** |
1341 | * gfs2_quotad - Write cached quota changes into the quota file | |
1342 | * @sdp: Pointer to GFS2 superblock | |
1343 | * | |
1344 | */ | |
1345 | ||
1346 | int gfs2_quotad(void *data) | |
1347 | { | |
1348 | struct gfs2_sbd *sdp = data; | |
1349 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1350 | unsigned long statfs_timeo = 0; | |
1351 | unsigned long quotad_timeo = 0; | |
1352 | unsigned long t = 0; | |
1353 | DEFINE_WAIT(wait); | |
813e0c46 | 1354 | int empty; |
37b2c837 SW |
1355 | |
1356 | while (!kthread_should_stop()) { | |
1357 | ||
1358 | /* Update the master statfs file */ | |
1359 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1360 | &statfs_timeo, &tune->gt_statfs_quantum); | |
1361 | ||
1362 | /* Update quota file */ | |
1363 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, | |
1364 | "ad_timeo, &tune->gt_quota_quantum); | |
1365 | ||
813e0c46 SW |
1366 | /* Check for & recover partially truncated inodes */ |
1367 | quotad_check_trunc_list(sdp); | |
1368 | ||
37b2c837 SW |
1369 | if (freezing(current)) |
1370 | refrigerator(); | |
1371 | t = min(quotad_timeo, statfs_timeo); | |
1372 | ||
1373 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_UNINTERRUPTIBLE); | |
813e0c46 SW |
1374 | spin_lock(&sdp->sd_trunc_lock); |
1375 | empty = list_empty(&sdp->sd_trunc_list); | |
1376 | spin_unlock(&sdp->sd_trunc_lock); | |
1377 | if (empty) | |
1378 | t -= schedule_timeout(t); | |
1379 | else | |
1380 | t = 0; | |
37b2c837 SW |
1381 | finish_wait(&sdp->sd_quota_wait, &wait); |
1382 | } | |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 |