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 | ||
cd915493 | 83 | static u64 qd2offset(struct gfs2_quota_data *qd) |
b3b94faa | 84 | { |
cd915493 | 85 | u64 offset; |
b3b94faa | 86 | |
cd915493 | 87 | offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags); |
b3b94faa DT |
88 | offset *= sizeof(struct gfs2_quota); |
89 | ||
90 | return offset; | |
91 | } | |
92 | ||
cd915493 | 93 | static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, |
b3b94faa DT |
94 | struct gfs2_quota_data **qdp) |
95 | { | |
96 | struct gfs2_quota_data *qd; | |
97 | int error; | |
98 | ||
37b2c837 | 99 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
b3b94faa DT |
100 | if (!qd) |
101 | return -ENOMEM; | |
102 | ||
103 | qd->qd_count = 1; | |
104 | qd->qd_id = id; | |
105 | if (user) | |
106 | set_bit(QDF_USER, &qd->qd_flags); | |
107 | qd->qd_slot = -1; | |
108 | ||
cd915493 | 109 | error = gfs2_glock_get(sdp, 2 * (u64)id + !user, |
b3b94faa DT |
110 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
111 | if (error) | |
112 | goto fail; | |
113 | ||
114 | error = gfs2_lvb_hold(qd->qd_gl); | |
115 | gfs2_glock_put(qd->qd_gl); | |
116 | if (error) | |
117 | goto fail; | |
118 | ||
119 | *qdp = qd; | |
120 | ||
121 | return 0; | |
122 | ||
a91ea69f | 123 | fail: |
37b2c837 | 124 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
125 | return error; |
126 | } | |
127 | ||
cd915493 | 128 | static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create, |
b3b94faa DT |
129 | struct gfs2_quota_data **qdp) |
130 | { | |
131 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; | |
132 | int error, found; | |
133 | ||
134 | *qdp = NULL; | |
135 | ||
136 | for (;;) { | |
137 | found = 0; | |
138 | spin_lock(&sdp->sd_quota_spin); | |
139 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
140 | if (qd->qd_id == id && | |
141 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { | |
142 | qd->qd_count++; | |
143 | found = 1; | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
148 | if (!found) | |
149 | qd = NULL; | |
150 | ||
151 | if (!qd && new_qd) { | |
152 | qd = new_qd; | |
153 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
154 | atomic_inc(&sdp->sd_quota_count); | |
155 | new_qd = NULL; | |
156 | } | |
157 | ||
158 | spin_unlock(&sdp->sd_quota_spin); | |
159 | ||
160 | if (qd || !create) { | |
161 | if (new_qd) { | |
162 | gfs2_lvb_unhold(new_qd->qd_gl); | |
37b2c837 | 163 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
b3b94faa DT |
164 | } |
165 | *qdp = qd; | |
166 | return 0; | |
167 | } | |
168 | ||
169 | error = qd_alloc(sdp, user, id, &new_qd); | |
170 | if (error) | |
171 | return error; | |
172 | } | |
173 | } | |
174 | ||
175 | static void qd_hold(struct gfs2_quota_data *qd) | |
176 | { | |
177 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
178 | ||
179 | spin_lock(&sdp->sd_quota_spin); | |
180 | gfs2_assert(sdp, qd->qd_count); | |
181 | qd->qd_count++; | |
182 | spin_unlock(&sdp->sd_quota_spin); | |
183 | } | |
184 | ||
185 | static void qd_put(struct gfs2_quota_data *qd) | |
186 | { | |
187 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
188 | spin_lock(&sdp->sd_quota_spin); | |
189 | gfs2_assert(sdp, qd->qd_count); | |
190 | if (!--qd->qd_count) | |
191 | qd->qd_last_touched = jiffies; | |
192 | spin_unlock(&sdp->sd_quota_spin); | |
193 | } | |
194 | ||
195 | static int slot_get(struct gfs2_quota_data *qd) | |
196 | { | |
197 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
198 | unsigned int c, o = 0, b; | |
199 | unsigned char byte = 0; | |
200 | ||
201 | spin_lock(&sdp->sd_quota_spin); | |
202 | ||
203 | if (qd->qd_slot_count++) { | |
204 | spin_unlock(&sdp->sd_quota_spin); | |
205 | return 0; | |
206 | } | |
207 | ||
208 | for (c = 0; c < sdp->sd_quota_chunks; c++) | |
209 | for (o = 0; o < PAGE_SIZE; o++) { | |
210 | byte = sdp->sd_quota_bitmap[c][o]; | |
211 | if (byte != 0xFF) | |
212 | goto found; | |
213 | } | |
214 | ||
215 | goto fail; | |
216 | ||
a91ea69f | 217 | found: |
b3b94faa DT |
218 | for (b = 0; b < 8; b++) |
219 | if (!(byte & (1 << b))) | |
220 | break; | |
221 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; | |
222 | ||
223 | if (qd->qd_slot >= sdp->sd_quota_slots) | |
224 | goto fail; | |
225 | ||
226 | sdp->sd_quota_bitmap[c][o] |= 1 << b; | |
227 | ||
228 | spin_unlock(&sdp->sd_quota_spin); | |
229 | ||
230 | return 0; | |
231 | ||
a91ea69f | 232 | fail: |
b3b94faa DT |
233 | qd->qd_slot_count--; |
234 | spin_unlock(&sdp->sd_quota_spin); | |
235 | return -ENOSPC; | |
236 | } | |
237 | ||
238 | static void slot_hold(struct gfs2_quota_data *qd) | |
239 | { | |
240 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
241 | ||
242 | spin_lock(&sdp->sd_quota_spin); | |
243 | gfs2_assert(sdp, qd->qd_slot_count); | |
244 | qd->qd_slot_count++; | |
245 | spin_unlock(&sdp->sd_quota_spin); | |
246 | } | |
247 | ||
248 | static void slot_put(struct gfs2_quota_data *qd) | |
249 | { | |
250 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
251 | ||
252 | spin_lock(&sdp->sd_quota_spin); | |
253 | gfs2_assert(sdp, qd->qd_slot_count); | |
254 | if (!--qd->qd_slot_count) { | |
255 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); | |
256 | qd->qd_slot = -1; | |
257 | } | |
258 | spin_unlock(&sdp->sd_quota_spin); | |
259 | } | |
260 | ||
261 | static int bh_get(struct gfs2_quota_data *qd) | |
262 | { | |
263 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 264 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 265 | unsigned int block, offset; |
b3b94faa DT |
266 | struct buffer_head *bh; |
267 | int error; | |
23591256 | 268 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
b3b94faa | 269 | |
f55ab26a | 270 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
271 | |
272 | if (qd->qd_bh_count++) { | |
f55ab26a | 273 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
274 | return 0; |
275 | } | |
276 | ||
277 | block = qd->qd_slot / sdp->sd_qc_per_block; | |
0d0868bd | 278 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
b3b94faa | 279 | |
23591256 | 280 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
e9e1ef2b | 281 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
b3b94faa DT |
282 | if (error) |
283 | goto fail; | |
7276b3b0 | 284 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
b3b94faa DT |
285 | if (error) |
286 | goto fail; | |
287 | error = -EIO; | |
288 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) | |
289 | goto fail_brelse; | |
290 | ||
291 | qd->qd_bh = bh; | |
292 | qd->qd_bh_qc = (struct gfs2_quota_change *) | |
293 | (bh->b_data + sizeof(struct gfs2_meta_header) + | |
294 | offset * sizeof(struct gfs2_quota_change)); | |
295 | ||
2e95b665 | 296 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
297 | |
298 | return 0; | |
299 | ||
a91ea69f | 300 | fail_brelse: |
b3b94faa | 301 | brelse(bh); |
a91ea69f | 302 | fail: |
b3b94faa | 303 | qd->qd_bh_count--; |
f55ab26a | 304 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
305 | return error; |
306 | } | |
307 | ||
308 | static void bh_put(struct gfs2_quota_data *qd) | |
309 | { | |
310 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
311 | ||
f55ab26a | 312 | mutex_lock(&sdp->sd_quota_mutex); |
b3b94faa DT |
313 | gfs2_assert(sdp, qd->qd_bh_count); |
314 | if (!--qd->qd_bh_count) { | |
315 | brelse(qd->qd_bh); | |
316 | qd->qd_bh = NULL; | |
317 | qd->qd_bh_qc = NULL; | |
318 | } | |
f55ab26a | 319 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
320 | } |
321 | ||
322 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) | |
323 | { | |
324 | struct gfs2_quota_data *qd = NULL; | |
325 | int error; | |
326 | int found = 0; | |
327 | ||
328 | *qdp = NULL; | |
329 | ||
330 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
331 | return 0; | |
332 | ||
333 | spin_lock(&sdp->sd_quota_spin); | |
334 | ||
335 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { | |
336 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
337 | !test_bit(QDF_CHANGE, &qd->qd_flags) || | |
338 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) | |
339 | continue; | |
340 | ||
341 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
342 | ||
343 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
344 | gfs2_assert_warn(sdp, qd->qd_count); | |
345 | qd->qd_count++; | |
346 | qd->qd_change_sync = qd->qd_change; | |
347 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
348 | qd->qd_slot_count++; | |
349 | found = 1; | |
350 | ||
351 | break; | |
352 | } | |
353 | ||
354 | if (!found) | |
355 | qd = NULL; | |
356 | ||
357 | spin_unlock(&sdp->sd_quota_spin); | |
358 | ||
359 | if (qd) { | |
360 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
361 | error = bh_get(qd); | |
362 | if (error) { | |
363 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
364 | slot_put(qd); | |
365 | qd_put(qd); | |
366 | return error; | |
367 | } | |
368 | } | |
369 | ||
370 | *qdp = qd; | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | static int qd_trylock(struct gfs2_quota_data *qd) | |
376 | { | |
377 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
378 | ||
379 | if (sdp->sd_vfs->s_flags & MS_RDONLY) | |
380 | return 0; | |
381 | ||
382 | spin_lock(&sdp->sd_quota_spin); | |
383 | ||
384 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || | |
385 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
386 | spin_unlock(&sdp->sd_quota_spin); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); | |
391 | ||
392 | set_bit(QDF_LOCKED, &qd->qd_flags); | |
393 | gfs2_assert_warn(sdp, qd->qd_count); | |
394 | qd->qd_count++; | |
395 | qd->qd_change_sync = qd->qd_change; | |
396 | gfs2_assert_warn(sdp, qd->qd_slot_count); | |
397 | qd->qd_slot_count++; | |
398 | ||
399 | spin_unlock(&sdp->sd_quota_spin); | |
400 | ||
401 | gfs2_assert_warn(sdp, qd->qd_change_sync); | |
402 | if (bh_get(qd)) { | |
403 | clear_bit(QDF_LOCKED, &qd->qd_flags); | |
404 | slot_put(qd); | |
405 | qd_put(qd); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | return 1; | |
410 | } | |
411 | ||
412 | static void qd_unlock(struct gfs2_quota_data *qd) | |
413 | { | |
568f4c96 SW |
414 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
415 | test_bit(QDF_LOCKED, &qd->qd_flags)); | |
b3b94faa DT |
416 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
417 | bh_put(qd); | |
418 | slot_put(qd); | |
419 | qd_put(qd); | |
420 | } | |
421 | ||
cd915493 | 422 | static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, int create, |
b3b94faa DT |
423 | struct gfs2_quota_data **qdp) |
424 | { | |
425 | int error; | |
426 | ||
427 | error = qd_get(sdp, user, id, create, qdp); | |
428 | if (error) | |
429 | return error; | |
430 | ||
431 | error = slot_get(*qdp); | |
432 | if (error) | |
433 | goto fail; | |
434 | ||
435 | error = bh_get(*qdp); | |
436 | if (error) | |
437 | goto fail_slot; | |
438 | ||
439 | return 0; | |
440 | ||
a91ea69f | 441 | fail_slot: |
b3b94faa | 442 | slot_put(*qdp); |
a91ea69f | 443 | fail: |
b3b94faa DT |
444 | qd_put(*qdp); |
445 | return error; | |
446 | } | |
447 | ||
448 | static void qdsb_put(struct gfs2_quota_data *qd) | |
449 | { | |
450 | bh_put(qd); | |
451 | slot_put(qd); | |
452 | qd_put(qd); | |
453 | } | |
454 | ||
cd915493 | 455 | int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 456 | { |
feaa7bba | 457 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 458 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
459 | struct gfs2_quota_data **qd = al->al_qd; |
460 | int error; | |
461 | ||
462 | if (gfs2_assert_warn(sdp, !al->al_qd_num) || | |
463 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) | |
464 | return -EIO; | |
465 | ||
466 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) | |
467 | return 0; | |
468 | ||
2933f925 | 469 | error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, CREATE, qd); |
b3b94faa DT |
470 | if (error) |
471 | goto out; | |
472 | al->al_qd_num++; | |
473 | qd++; | |
474 | ||
2933f925 | 475 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, CREATE, qd); |
b3b94faa DT |
476 | if (error) |
477 | goto out; | |
478 | al->al_qd_num++; | |
479 | qd++; | |
480 | ||
2933f925 | 481 | if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) { |
b3b94faa DT |
482 | error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd); |
483 | if (error) | |
484 | goto out; | |
485 | al->al_qd_num++; | |
486 | qd++; | |
487 | } | |
488 | ||
2933f925 | 489 | if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) { |
b3b94faa DT |
490 | error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd); |
491 | if (error) | |
492 | goto out; | |
493 | al->al_qd_num++; | |
494 | qd++; | |
495 | } | |
496 | ||
a91ea69f | 497 | out: |
b3b94faa DT |
498 | if (error) |
499 | gfs2_quota_unhold(ip); | |
b3b94faa DT |
500 | return error; |
501 | } | |
502 | ||
503 | void gfs2_quota_unhold(struct gfs2_inode *ip) | |
504 | { | |
feaa7bba | 505 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 506 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
507 | unsigned int x; |
508 | ||
509 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); | |
510 | ||
511 | for (x = 0; x < al->al_qd_num; x++) { | |
512 | qdsb_put(al->al_qd[x]); | |
513 | al->al_qd[x] = NULL; | |
514 | } | |
515 | al->al_qd_num = 0; | |
516 | } | |
517 | ||
518 | static int sort_qd(const void *a, const void *b) | |
519 | { | |
48fac179 SW |
520 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
521 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; | |
b3b94faa DT |
522 | |
523 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != | |
524 | !test_bit(QDF_USER, &qd_b->qd_flags)) { | |
525 | if (test_bit(QDF_USER, &qd_a->qd_flags)) | |
48fac179 | 526 | return -1; |
b3b94faa | 527 | else |
48fac179 | 528 | return 1; |
b3b94faa | 529 | } |
48fac179 SW |
530 | if (qd_a->qd_id < qd_b->qd_id) |
531 | return -1; | |
532 | if (qd_a->qd_id > qd_b->qd_id) | |
533 | return 1; | |
b3b94faa | 534 | |
48fac179 | 535 | return 0; |
b3b94faa DT |
536 | } |
537 | ||
cd915493 | 538 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
b3b94faa DT |
539 | { |
540 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 541 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
b3b94faa | 542 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
cd915493 | 543 | s64 x; |
b3b94faa | 544 | |
f55ab26a | 545 | mutex_lock(&sdp->sd_quota_mutex); |
d4e9c4c3 | 546 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
b3b94faa DT |
547 | |
548 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { | |
549 | qc->qc_change = 0; | |
550 | qc->qc_flags = 0; | |
551 | if (test_bit(QDF_USER, &qd->qd_flags)) | |
552 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); | |
553 | qc->qc_id = cpu_to_be32(qd->qd_id); | |
554 | } | |
555 | ||
b44b84d7 | 556 | x = be64_to_cpu(qc->qc_change) + change; |
b3b94faa DT |
557 | qc->qc_change = cpu_to_be64(x); |
558 | ||
559 | spin_lock(&sdp->sd_quota_spin); | |
560 | qd->qd_change = x; | |
561 | spin_unlock(&sdp->sd_quota_spin); | |
562 | ||
563 | if (!x) { | |
564 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); | |
565 | clear_bit(QDF_CHANGE, &qd->qd_flags); | |
566 | qc->qc_flags = 0; | |
567 | qc->qc_id = 0; | |
568 | slot_put(qd); | |
569 | qd_put(qd); | |
570 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { | |
571 | qd_hold(qd); | |
572 | slot_hold(qd); | |
573 | } | |
907b9bce | 574 | |
f55ab26a | 575 | mutex_unlock(&sdp->sd_quota_mutex); |
b3b94faa DT |
576 | } |
577 | ||
bb8d8a6f SW |
578 | static void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf) |
579 | { | |
580 | const struct gfs2_quota *str = buf; | |
581 | ||
582 | qu->qu_limit = be64_to_cpu(str->qu_limit); | |
583 | qu->qu_warn = be64_to_cpu(str->qu_warn); | |
584 | qu->qu_value = be64_to_cpu(str->qu_value); | |
2d9a4bbf | 585 | qu->qu_ll_next = be32_to_cpu(str->qu_ll_next); |
bb8d8a6f SW |
586 | } |
587 | ||
588 | static void gfs2_quota_out(const struct gfs2_quota_host *qu, void *buf) | |
589 | { | |
590 | struct gfs2_quota *str = buf; | |
591 | ||
592 | str->qu_limit = cpu_to_be64(qu->qu_limit); | |
593 | str->qu_warn = cpu_to_be64(qu->qu_warn); | |
594 | str->qu_value = cpu_to_be64(qu->qu_value); | |
2d9a4bbf | 595 | str->qu_ll_next = cpu_to_be32(qu->qu_ll_next); |
bb8d8a6f SW |
596 | memset(&str->qu_reserved, 0, sizeof(str->qu_reserved)); |
597 | } | |
598 | ||
18ec7d5c SW |
599 | /** |
600 | * gfs2_adjust_quota | |
601 | * | |
602 | * This function was mostly borrowed from gfs2_block_truncate_page which was | |
603 | * in turn mostly borrowed from ext3 | |
604 | */ | |
605 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, | |
cd915493 | 606 | s64 change, struct gfs2_quota_data *qd) |
18ec7d5c | 607 | { |
feaa7bba | 608 | struct inode *inode = &ip->i_inode; |
18ec7d5c SW |
609 | struct address_space *mapping = inode->i_mapping; |
610 | unsigned long index = loc >> PAGE_CACHE_SHIFT; | |
1990e917 | 611 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
18ec7d5c SW |
612 | unsigned blocksize, iblock, pos; |
613 | struct buffer_head *bh; | |
614 | struct page *page; | |
615 | void *kaddr; | |
1990e917 AD |
616 | char *ptr; |
617 | struct gfs2_quota_host qp; | |
e9fc2aa0 | 618 | s64 value; |
18ec7d5c SW |
619 | int err = -EIO; |
620 | ||
20b95bf2 | 621 | if (gfs2_is_stuffed(ip)) |
0fd53554 | 622 | gfs2_unstuff_dinode(ip, NULL); |
20b95bf2 | 623 | |
18ec7d5c SW |
624 | page = grab_cache_page(mapping, index); |
625 | if (!page) | |
626 | return -ENOMEM; | |
627 | ||
628 | blocksize = inode->i_sb->s_blocksize; | |
629 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); | |
630 | ||
631 | if (!page_has_buffers(page)) | |
632 | create_empty_buffers(page, blocksize, 0); | |
633 | ||
634 | bh = page_buffers(page); | |
635 | pos = blocksize; | |
636 | while (offset >= pos) { | |
637 | bh = bh->b_this_page; | |
638 | iblock++; | |
639 | pos += blocksize; | |
640 | } | |
641 | ||
642 | if (!buffer_mapped(bh)) { | |
e9e1ef2b | 643 | gfs2_block_map(inode, iblock, bh, 1); |
18ec7d5c SW |
644 | if (!buffer_mapped(bh)) |
645 | goto unlock; | |
646 | } | |
647 | ||
648 | if (PageUptodate(page)) | |
649 | set_buffer_uptodate(bh); | |
650 | ||
651 | if (!buffer_uptodate(bh)) { | |
2e565bb6 | 652 | ll_rw_block(READ_META, 1, &bh); |
18ec7d5c SW |
653 | wait_on_buffer(bh); |
654 | if (!buffer_uptodate(bh)) | |
655 | goto unlock; | |
656 | } | |
657 | ||
658 | gfs2_trans_add_bh(ip->i_gl, bh, 0); | |
659 | ||
660 | kaddr = kmap_atomic(page, KM_USER0); | |
48fac179 | 661 | ptr = kaddr + offset; |
1990e917 AD |
662 | gfs2_quota_in(&qp, ptr); |
663 | qp.qu_value += change; | |
664 | value = qp.qu_value; | |
665 | gfs2_quota_out(&qp, ptr); | |
18ec7d5c SW |
666 | flush_dcache_page(page); |
667 | kunmap_atomic(kaddr, KM_USER0); | |
668 | err = 0; | |
669 | qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC); | |
18ec7d5c | 670 | qd->qd_qb.qb_value = cpu_to_be64(value); |
2a87ab08 AD |
671 | ((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_magic = cpu_to_be32(GFS2_MAGIC); |
672 | ((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_value = cpu_to_be64(value); | |
18ec7d5c SW |
673 | unlock: |
674 | unlock_page(page); | |
675 | page_cache_release(page); | |
676 | return err; | |
677 | } | |
678 | ||
b3b94faa DT |
679 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
680 | { | |
681 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; | |
feaa7bba | 682 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa DT |
683 | unsigned int data_blocks, ind_blocks; |
684 | struct gfs2_holder *ghs, i_gh; | |
685 | unsigned int qx, x; | |
686 | struct gfs2_quota_data *qd; | |
f42faf4f | 687 | loff_t offset; |
20b95bf2 | 688 | unsigned int nalloc = 0, blocks; |
b3b94faa DT |
689 | struct gfs2_alloc *al = NULL; |
690 | int error; | |
691 | ||
692 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), | |
693 | &data_blocks, &ind_blocks); | |
694 | ||
16c5f06f | 695 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
b3b94faa DT |
696 | if (!ghs) |
697 | return -ENOMEM; | |
698 | ||
699 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); | |
700 | for (qx = 0; qx < num_qd; qx++) { | |
701 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, | |
702 | LM_ST_EXCLUSIVE, | |
703 | GL_NOCACHE, &ghs[qx]); | |
704 | if (error) | |
705 | goto out; | |
706 | } | |
707 | ||
708 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
709 | if (error) | |
710 | goto out; | |
711 | ||
712 | for (x = 0; x < num_qd; x++) { | |
713 | int alloc_required; | |
714 | ||
715 | offset = qd2offset(qda[x]); | |
716 | error = gfs2_write_alloc_required(ip, offset, | |
717 | sizeof(struct gfs2_quota), | |
718 | &alloc_required); | |
719 | if (error) | |
720 | goto out_gunlock; | |
721 | if (alloc_required) | |
722 | nalloc++; | |
723 | } | |
724 | ||
20b95bf2 AD |
725 | al = gfs2_alloc_get(ip); |
726 | if (!al) { | |
727 | error = -ENOMEM; | |
728 | goto out_gunlock; | |
729 | } | |
730 | /* | |
731 | * 1 blk for unstuffing inode if stuffed. We add this extra | |
732 | * block to the reservation unconditionally. If the inode | |
733 | * doesn't need unstuffing, the block will be released to the | |
734 | * rgrp since it won't be allocated during the transaction | |
735 | */ | |
736 | al->al_requested = 1; | |
737 | /* +1 in the end for block requested above for unstuffing */ | |
738 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 1; | |
b3b94faa | 739 | |
20b95bf2 AD |
740 | if (nalloc) |
741 | al->al_requested += nalloc * (data_blocks + ind_blocks); | |
742 | error = gfs2_inplace_reserve(ip); | |
743 | if (error) | |
744 | goto out_alloc; | |
b3b94faa | 745 | |
20b95bf2 AD |
746 | if (nalloc) |
747 | blocks += al->al_rgd->rd_length + nalloc * ind_blocks + RES_STATFS; | |
748 | ||
749 | error = gfs2_trans_begin(sdp, blocks, 0); | |
750 | if (error) | |
751 | goto out_ipres; | |
b3b94faa DT |
752 | |
753 | for (x = 0; x < num_qd; x++) { | |
b3b94faa DT |
754 | qd = qda[x]; |
755 | offset = qd2offset(qd); | |
18ec7d5c | 756 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, |
568f4c96 | 757 | (struct gfs2_quota_data *) |
2a87ab08 | 758 | qd); |
18ec7d5c | 759 | if (error) |
b3b94faa | 760 | goto out_end_trans; |
b3b94faa DT |
761 | |
762 | do_qc(qd, -qd->qd_change_sync); | |
b3b94faa DT |
763 | } |
764 | ||
765 | error = 0; | |
766 | ||
a91ea69f | 767 | out_end_trans: |
b3b94faa | 768 | gfs2_trans_end(sdp); |
a91ea69f | 769 | out_ipres: |
20b95bf2 | 770 | gfs2_inplace_release(ip); |
a91ea69f | 771 | out_alloc: |
20b95bf2 | 772 | gfs2_alloc_put(ip); |
a91ea69f | 773 | out_gunlock: |
b3b94faa | 774 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 775 | out: |
b3b94faa DT |
776 | while (qx--) |
777 | gfs2_glock_dq_uninit(&ghs[qx]); | |
778 | kfree(ghs); | |
b09e593d | 779 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
b3b94faa DT |
780 | return error; |
781 | } | |
782 | ||
783 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, | |
784 | struct gfs2_holder *q_gh) | |
785 | { | |
786 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
feaa7bba | 787 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
b3b94faa | 788 | struct gfs2_holder i_gh; |
b5bc9e8b | 789 | struct gfs2_quota_host q; |
b3b94faa DT |
790 | char buf[sizeof(struct gfs2_quota)]; |
791 | int error; | |
e9fc2aa0 | 792 | struct gfs2_quota_lvb *qlvb; |
b3b94faa | 793 | |
a91ea69f | 794 | restart: |
b3b94faa DT |
795 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
796 | if (error) | |
797 | return error; | |
798 | ||
e9fc2aa0 | 799 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
b3b94faa | 800 | |
e9fc2aa0 | 801 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
f42faf4f | 802 | loff_t pos; |
b3b94faa DT |
803 | gfs2_glock_dq_uninit(q_gh); |
804 | error = gfs2_glock_nq_init(qd->qd_gl, | |
805 | LM_ST_EXCLUSIVE, GL_NOCACHE, | |
806 | q_gh); | |
807 | if (error) | |
808 | return error; | |
809 | ||
e9fc2aa0 | 810 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
b3b94faa DT |
811 | if (error) |
812 | goto fail; | |
813 | ||
814 | memset(buf, 0, sizeof(struct gfs2_quota)); | |
f42faf4f | 815 | pos = qd2offset(qd); |
51ff87bd SW |
816 | error = gfs2_internal_read(ip, NULL, buf, &pos, |
817 | sizeof(struct gfs2_quota)); | |
b3b94faa DT |
818 | if (error < 0) |
819 | goto fail_gunlock; | |
820 | ||
821 | gfs2_glock_dq_uninit(&i_gh); | |
822 | ||
907b9bce | 823 | |
b3b94faa | 824 | gfs2_quota_in(&q, buf); |
e9fc2aa0 SW |
825 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; |
826 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); | |
827 | qlvb->__pad = 0; | |
828 | qlvb->qb_limit = cpu_to_be64(q.qu_limit); | |
829 | qlvb->qb_warn = cpu_to_be64(q.qu_warn); | |
830 | qlvb->qb_value = cpu_to_be64(q.qu_value); | |
831 | qd->qd_qb = *qlvb; | |
b3b94faa DT |
832 | |
833 | if (gfs2_glock_is_blocking(qd->qd_gl)) { | |
834 | gfs2_glock_dq_uninit(q_gh); | |
835 | force_refresh = 0; | |
836 | goto restart; | |
837 | } | |
838 | } | |
839 | ||
840 | return 0; | |
841 | ||
a91ea69f | 842 | fail_gunlock: |
b3b94faa | 843 | gfs2_glock_dq_uninit(&i_gh); |
a91ea69f | 844 | fail: |
b3b94faa | 845 | gfs2_glock_dq_uninit(q_gh); |
b3b94faa DT |
846 | return error; |
847 | } | |
848 | ||
cd915493 | 849 | int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 850 | { |
feaa7bba | 851 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 852 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
853 | unsigned int x; |
854 | int error = 0; | |
855 | ||
856 | gfs2_quota_hold(ip, uid, gid); | |
857 | ||
858 | if (capable(CAP_SYS_RESOURCE) || | |
859 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
860 | return 0; | |
861 | ||
862 | sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *), | |
863 | sort_qd, NULL); | |
864 | ||
865 | for (x = 0; x < al->al_qd_num; x++) { | |
866 | error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]); | |
867 | if (error) | |
868 | break; | |
869 | } | |
870 | ||
871 | if (!error) | |
872 | set_bit(GIF_QD_LOCKED, &ip->i_flags); | |
873 | else { | |
874 | while (x--) | |
875 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
876 | gfs2_quota_unhold(ip); | |
877 | } | |
878 | ||
879 | return error; | |
880 | } | |
881 | ||
882 | static int need_sync(struct gfs2_quota_data *qd) | |
883 | { | |
884 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
885 | struct gfs2_tune *gt = &sdp->sd_tune; | |
cd915493 | 886 | s64 value; |
b3b94faa DT |
887 | unsigned int num, den; |
888 | int do_sync = 1; | |
889 | ||
890 | if (!qd->qd_qb.qb_limit) | |
891 | return 0; | |
892 | ||
893 | spin_lock(&sdp->sd_quota_spin); | |
894 | value = qd->qd_change; | |
895 | spin_unlock(&sdp->sd_quota_spin); | |
896 | ||
897 | spin_lock(>->gt_spin); | |
898 | num = gt->gt_quota_scale_num; | |
899 | den = gt->gt_quota_scale_den; | |
900 | spin_unlock(>->gt_spin); | |
901 | ||
902 | if (value < 0) | |
903 | do_sync = 0; | |
e9fc2aa0 SW |
904 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
905 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) | |
b3b94faa DT |
906 | do_sync = 0; |
907 | else { | |
908 | value *= gfs2_jindex_size(sdp) * num; | |
4abaca17 | 909 | value = div_s64(value, den); |
e9fc2aa0 | 910 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
cd915493 | 911 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
b3b94faa DT |
912 | do_sync = 0; |
913 | } | |
914 | ||
915 | return do_sync; | |
916 | } | |
917 | ||
918 | void gfs2_quota_unlock(struct gfs2_inode *ip) | |
919 | { | |
6dbd8224 | 920 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
921 | struct gfs2_quota_data *qda[4]; |
922 | unsigned int count = 0; | |
923 | unsigned int x; | |
924 | ||
925 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
926 | goto out; | |
927 | ||
928 | for (x = 0; x < al->al_qd_num; x++) { | |
929 | struct gfs2_quota_data *qd; | |
930 | int sync; | |
931 | ||
932 | qd = al->al_qd[x]; | |
933 | sync = need_sync(qd); | |
934 | ||
935 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); | |
936 | ||
937 | if (sync && qd_trylock(qd)) | |
938 | qda[count++] = qd; | |
939 | } | |
940 | ||
941 | if (count) { | |
942 | do_sync(count, qda); | |
943 | for (x = 0; x < count; x++) | |
944 | qd_unlock(qda[x]); | |
945 | } | |
946 | ||
a91ea69f | 947 | out: |
b3b94faa DT |
948 | gfs2_quota_unhold(ip); |
949 | } | |
950 | ||
951 | #define MAX_LINE 256 | |
952 | ||
953 | static int print_message(struct gfs2_quota_data *qd, char *type) | |
954 | { | |
955 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; | |
b3b94faa | 956 | |
02630a12 SW |
957 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\r\n", |
958 | sdp->sd_fsname, type, | |
959 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", | |
960 | qd->qd_id); | |
b3b94faa DT |
961 | |
962 | return 0; | |
963 | } | |
964 | ||
cd915493 | 965 | int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid) |
b3b94faa | 966 | { |
feaa7bba | 967 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 968 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa | 969 | struct gfs2_quota_data *qd; |
cd915493 | 970 | s64 value; |
b3b94faa DT |
971 | unsigned int x; |
972 | int error = 0; | |
973 | ||
974 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) | |
975 | return 0; | |
976 | ||
977 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) | |
978 | return 0; | |
979 | ||
980 | for (x = 0; x < al->al_qd_num; x++) { | |
981 | qd = al->al_qd[x]; | |
982 | ||
983 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
984 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) | |
985 | continue; | |
986 | ||
e9fc2aa0 | 987 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
b3b94faa DT |
988 | spin_lock(&sdp->sd_quota_spin); |
989 | value += qd->qd_change; | |
990 | spin_unlock(&sdp->sd_quota_spin); | |
991 | ||
cd915493 | 992 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
b3b94faa DT |
993 | print_message(qd, "exceeded"); |
994 | error = -EDQUOT; | |
995 | break; | |
e9fc2aa0 | 996 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
cd915493 | 997 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
b3b94faa | 998 | time_after_eq(jiffies, qd->qd_last_warn + |
568f4c96 SW |
999 | gfs2_tune_get(sdp, |
1000 | gt_quota_warn_period) * HZ)) { | |
b3b94faa DT |
1001 | error = print_message(qd, "warning"); |
1002 | qd->qd_last_warn = jiffies; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | return error; | |
1007 | } | |
1008 | ||
cd915493 SW |
1009 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
1010 | u32 uid, u32 gid) | |
b3b94faa | 1011 | { |
6dbd8224 | 1012 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1013 | struct gfs2_quota_data *qd; |
1014 | unsigned int x; | |
b3b94faa | 1015 | |
feaa7bba | 1016 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
b3b94faa | 1017 | return; |
383f01fb | 1018 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
b3b94faa DT |
1019 | return; |
1020 | ||
1021 | for (x = 0; x < al->al_qd_num; x++) { | |
1022 | qd = al->al_qd[x]; | |
1023 | ||
1024 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || | |
1025 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { | |
1026 | do_qc(qd, change); | |
b3b94faa DT |
1027 | } |
1028 | } | |
1029 | } | |
1030 | ||
1031 | int gfs2_quota_sync(struct gfs2_sbd *sdp) | |
1032 | { | |
1033 | struct gfs2_quota_data **qda; | |
1034 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); | |
1035 | unsigned int num_qd; | |
1036 | unsigned int x; | |
1037 | int error = 0; | |
1038 | ||
1039 | sdp->sd_quota_sync_gen++; | |
1040 | ||
1041 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); | |
1042 | if (!qda) | |
1043 | return -ENOMEM; | |
1044 | ||
1045 | do { | |
1046 | num_qd = 0; | |
1047 | ||
1048 | for (;;) { | |
1049 | error = qd_fish(sdp, qda + num_qd); | |
1050 | if (error || !qda[num_qd]) | |
1051 | break; | |
1052 | if (++num_qd == max_qd) | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | if (num_qd) { | |
1057 | if (!error) | |
1058 | error = do_sync(num_qd, qda); | |
1059 | if (!error) | |
1060 | for (x = 0; x < num_qd; x++) | |
1061 | qda[x]->qd_sync_gen = | |
1062 | sdp->sd_quota_sync_gen; | |
1063 | ||
1064 | for (x = 0; x < num_qd; x++) | |
1065 | qd_unlock(qda[x]); | |
1066 | } | |
1067 | } while (!error && num_qd == max_qd); | |
1068 | ||
1069 | kfree(qda); | |
1070 | ||
1071 | return error; | |
1072 | } | |
1073 | ||
cd915493 | 1074 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id) |
b3b94faa DT |
1075 | { |
1076 | struct gfs2_quota_data *qd; | |
1077 | struct gfs2_holder q_gh; | |
1078 | int error; | |
1079 | ||
1080 | error = qd_get(sdp, user, id, CREATE, &qd); | |
1081 | if (error) | |
1082 | return error; | |
1083 | ||
1084 | error = do_glock(qd, FORCE, &q_gh); | |
1085 | if (!error) | |
1086 | gfs2_glock_dq_uninit(&q_gh); | |
1087 | ||
1088 | qd_put(qd); | |
1089 | ||
1090 | return error; | |
1091 | } | |
1092 | ||
bb8d8a6f SW |
1093 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
1094 | { | |
1095 | const struct gfs2_quota_change *str = buf; | |
1096 | ||
1097 | qc->qc_change = be64_to_cpu(str->qc_change); | |
1098 | qc->qc_flags = be32_to_cpu(str->qc_flags); | |
1099 | qc->qc_id = be32_to_cpu(str->qc_id); | |
1100 | } | |
1101 | ||
b3b94faa DT |
1102 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
1103 | { | |
feaa7bba | 1104 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
c9e98886 | 1105 | unsigned int blocks = ip->i_disksize >> sdp->sd_sb.sb_bsize_shift; |
b3b94faa DT |
1106 | unsigned int x, slot = 0; |
1107 | unsigned int found = 0; | |
cd915493 SW |
1108 | u64 dblock; |
1109 | u32 extlen = 0; | |
b3b94faa DT |
1110 | int error; |
1111 | ||
c9e98886 SW |
1112 | if (!ip->i_disksize || ip->i_disksize > (64 << 20) || |
1113 | ip->i_disksize & (sdp->sd_sb.sb_bsize - 1)) { | |
b3b94faa | 1114 | gfs2_consist_inode(ip); |
907b9bce | 1115 | return -EIO; |
b3b94faa DT |
1116 | } |
1117 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; | |
5c676f6d | 1118 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
b3b94faa DT |
1119 | |
1120 | error = -ENOMEM; | |
1121 | ||
1122 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, | |
16c5f06f | 1123 | sizeof(unsigned char *), GFP_NOFS); |
b3b94faa DT |
1124 | if (!sdp->sd_quota_bitmap) |
1125 | return error; | |
1126 | ||
1127 | for (x = 0; x < sdp->sd_quota_chunks; x++) { | |
16c5f06f | 1128 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
b3b94faa DT |
1129 | if (!sdp->sd_quota_bitmap[x]) |
1130 | goto fail; | |
1131 | } | |
1132 | ||
1133 | for (x = 0; x < blocks; x++) { | |
1134 | struct buffer_head *bh; | |
1135 | unsigned int y; | |
1136 | ||
1137 | if (!extlen) { | |
1138 | int new = 0; | |
feaa7bba | 1139 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
b3b94faa DT |
1140 | if (error) |
1141 | goto fail; | |
1142 | } | |
b3b94faa | 1143 | error = -EIO; |
7276b3b0 SW |
1144 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
1145 | if (!bh) | |
1146 | goto fail; | |
b3b94faa DT |
1147 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
1148 | brelse(bh); | |
1149 | goto fail; | |
1150 | } | |
1151 | ||
7276b3b0 | 1152 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
b3b94faa | 1153 | y++, slot++) { |
b62f963e | 1154 | struct gfs2_quota_change_host qc; |
b3b94faa DT |
1155 | struct gfs2_quota_data *qd; |
1156 | ||
1157 | gfs2_quota_change_in(&qc, bh->b_data + | |
1158 | sizeof(struct gfs2_meta_header) + | |
1159 | y * sizeof(struct gfs2_quota_change)); | |
1160 | if (!qc.qc_change) | |
1161 | continue; | |
1162 | ||
1163 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), | |
1164 | qc.qc_id, &qd); | |
1165 | if (error) { | |
1166 | brelse(bh); | |
1167 | goto fail; | |
1168 | } | |
1169 | ||
1170 | set_bit(QDF_CHANGE, &qd->qd_flags); | |
1171 | qd->qd_change = qc.qc_change; | |
1172 | qd->qd_slot = slot; | |
1173 | qd->qd_slot_count = 1; | |
1174 | qd->qd_last_touched = jiffies; | |
1175 | ||
1176 | spin_lock(&sdp->sd_quota_spin); | |
1177 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); | |
1178 | list_add(&qd->qd_list, &sdp->sd_quota_list); | |
1179 | atomic_inc(&sdp->sd_quota_count); | |
1180 | spin_unlock(&sdp->sd_quota_spin); | |
1181 | ||
1182 | found++; | |
1183 | } | |
1184 | ||
1185 | brelse(bh); | |
1186 | dblock++; | |
1187 | extlen--; | |
1188 | } | |
1189 | ||
1190 | if (found) | |
1191 | fs_info(sdp, "found %u quota changes\n", found); | |
1192 | ||
1193 | return 0; | |
1194 | ||
a91ea69f | 1195 | fail: |
b3b94faa DT |
1196 | gfs2_quota_cleanup(sdp); |
1197 | return error; | |
1198 | } | |
1199 | ||
37b2c837 | 1200 | static void gfs2_quota_scan(struct gfs2_sbd *sdp) |
b3b94faa DT |
1201 | { |
1202 | struct gfs2_quota_data *qd, *safe; | |
1203 | LIST_HEAD(dead); | |
1204 | ||
1205 | spin_lock(&sdp->sd_quota_spin); | |
1206 | list_for_each_entry_safe(qd, safe, &sdp->sd_quota_list, qd_list) { | |
1207 | if (!qd->qd_count && | |
1208 | time_after_eq(jiffies, qd->qd_last_touched + | |
1209 | gfs2_tune_get(sdp, gt_quota_cache_secs) * HZ)) { | |
1210 | list_move(&qd->qd_list, &dead); | |
1211 | gfs2_assert_warn(sdp, | |
1212 | atomic_read(&sdp->sd_quota_count) > 0); | |
1213 | atomic_dec(&sdp->sd_quota_count); | |
1214 | } | |
1215 | } | |
1216 | spin_unlock(&sdp->sd_quota_spin); | |
1217 | ||
1218 | while (!list_empty(&dead)) { | |
1219 | qd = list_entry(dead.next, struct gfs2_quota_data, qd_list); | |
1220 | list_del(&qd->qd_list); | |
1221 | ||
1222 | gfs2_assert_warn(sdp, !qd->qd_change); | |
1223 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1224 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1225 | ||
1226 | gfs2_lvb_unhold(qd->qd_gl); | |
37b2c837 | 1227 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
1228 | } |
1229 | } | |
1230 | ||
1231 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) | |
1232 | { | |
1233 | struct list_head *head = &sdp->sd_quota_list; | |
1234 | struct gfs2_quota_data *qd; | |
1235 | unsigned int x; | |
1236 | ||
1237 | spin_lock(&sdp->sd_quota_spin); | |
1238 | while (!list_empty(head)) { | |
1239 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); | |
1240 | ||
1241 | if (qd->qd_count > 1 || | |
1242 | (qd->qd_count && !test_bit(QDF_CHANGE, &qd->qd_flags))) { | |
1243 | list_move(&qd->qd_list, head); | |
1244 | spin_unlock(&sdp->sd_quota_spin); | |
1245 | schedule(); | |
1246 | spin_lock(&sdp->sd_quota_spin); | |
1247 | continue; | |
1248 | } | |
1249 | ||
1250 | list_del(&qd->qd_list); | |
1251 | atomic_dec(&sdp->sd_quota_count); | |
1252 | spin_unlock(&sdp->sd_quota_spin); | |
1253 | ||
1254 | if (!qd->qd_count) { | |
1255 | gfs2_assert_warn(sdp, !qd->qd_change); | |
1256 | gfs2_assert_warn(sdp, !qd->qd_slot_count); | |
1257 | } else | |
1258 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); | |
1259 | gfs2_assert_warn(sdp, !qd->qd_bh_count); | |
1260 | ||
1261 | gfs2_lvb_unhold(qd->qd_gl); | |
37b2c837 | 1262 | kmem_cache_free(gfs2_quotad_cachep, qd); |
b3b94faa DT |
1263 | |
1264 | spin_lock(&sdp->sd_quota_spin); | |
1265 | } | |
1266 | spin_unlock(&sdp->sd_quota_spin); | |
1267 | ||
1268 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); | |
1269 | ||
1270 | if (sdp->sd_quota_bitmap) { | |
1271 | for (x = 0; x < sdp->sd_quota_chunks; x++) | |
1272 | kfree(sdp->sd_quota_bitmap[x]); | |
1273 | kfree(sdp->sd_quota_bitmap); | |
1274 | } | |
1275 | } | |
1276 | ||
37b2c837 SW |
1277 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
1278 | { | |
1279 | if (error == 0 || error == -EROFS) | |
1280 | return; | |
1281 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
1282 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); | |
1283 | } | |
1284 | ||
1285 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, | |
1286 | int (*fxn)(struct gfs2_sbd *sdp), | |
1287 | unsigned long t, unsigned long *timeo, | |
1288 | unsigned int *new_timeo) | |
1289 | { | |
1290 | if (t >= *timeo) { | |
1291 | int error = fxn(sdp); | |
1292 | quotad_error(sdp, msg, error); | |
1293 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; | |
1294 | } else { | |
1295 | *timeo -= t; | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * gfs2_quotad - Write cached quota changes into the quota file | |
1301 | * @sdp: Pointer to GFS2 superblock | |
1302 | * | |
1303 | */ | |
1304 | ||
1305 | int gfs2_quotad(void *data) | |
1306 | { | |
1307 | struct gfs2_sbd *sdp = data; | |
1308 | struct gfs2_tune *tune = &sdp->sd_tune; | |
1309 | unsigned long statfs_timeo = 0; | |
1310 | unsigned long quotad_timeo = 0; | |
1311 | unsigned long t = 0; | |
1312 | DEFINE_WAIT(wait); | |
1313 | ||
1314 | while (!kthread_should_stop()) { | |
1315 | ||
1316 | /* Update the master statfs file */ | |
1317 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, | |
1318 | &statfs_timeo, &tune->gt_statfs_quantum); | |
1319 | ||
1320 | /* Update quota file */ | |
1321 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, | |
1322 | "ad_timeo, &tune->gt_quota_quantum); | |
1323 | ||
1324 | /* FIXME: This should be turned into a shrinker */ | |
1325 | gfs2_quota_scan(sdp); | |
1326 | ||
1327 | if (freezing(current)) | |
1328 | refrigerator(); | |
1329 | t = min(quotad_timeo, statfs_timeo); | |
1330 | ||
1331 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_UNINTERRUPTIBLE); | |
1332 | t -= schedule_timeout(t); | |
1333 | finish_wait(&sdp->sd_quota_wait, &wait); | |
1334 | } | |
1335 | ||
1336 | return 0; | |
1337 | } | |
1338 |