blob: 58a9b9998b42d0d9603c7a49ffc746ab4a22ef87 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Peterson0d0868b2007-12-11 18:51:25 -06003 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
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.
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +010018 * Since quota tags are part of transactions, there is no need for a quota check
David Teiglandb3b94fa2006-01-16 16:50:04 +000019 * 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>
David Teiglandb3b94fa2006-01-16 16:50:04 +000044#include <linux/sort.h>
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000045#include <linux/fs.h>
Steven Whitehouse2e565bb2006-10-02 11:38:25 -040046#include <linux/bio.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050047#include <linux/gfs2_ondisk.h>
Steven Whitehouse37b2c832008-11-17 14:25:37 +000048#include <linux/kthread.h>
49#include <linux/freezer.h>
Steven Whitehouse2ec46502009-09-28 12:49:15 +010050#include <linux/quota.h>
Steven Whitehouse1d371b52009-09-11 15:57:27 +010051#include <linux/dqblk_xfs.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000052
53#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050054#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000055#include "bmap.h"
56#include "glock.h"
57#include "glops.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000058#include "log.h"
59#include "meta_io.h"
60#include "quota.h"
61#include "rgrp.h"
62#include "super.h"
63#include "trans.h"
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000064#include "inode.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050065#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000066
67#define QUOTA_USER 1
68#define QUOTA_GROUP 0
69
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010070struct gfs2_quota_change_host {
71 u64 qc_change;
72 u32 qc_flags; /* GFS2_QCF_... */
73 u32 qc_id;
74};
75
Abhijith Das0a7ab792009-01-07 16:03:37 -060076static LIST_HEAD(qd_lru_list);
77static atomic_t qd_lru_count = ATOMIC_INIT(0);
Xu Gang1328df72009-04-14 14:54:14 +080078static DEFINE_SPINLOCK(qd_lru_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -060079
Dave Chinner7f8275d2010-07-19 14:56:17 +100080int gfs2_shrink_qd_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask)
Abhijith Das0a7ab792009-01-07 16:03:37 -060081{
82 struct gfs2_quota_data *qd;
83 struct gfs2_sbd *sdp;
84
85 if (nr == 0)
86 goto out;
87
88 if (!(gfp_mask & __GFP_FS))
89 return -1;
90
91 spin_lock(&qd_lru_lock);
92 while (nr && !list_empty(&qd_lru_list)) {
93 qd = list_entry(qd_lru_list.next,
94 struct gfs2_quota_data, qd_reclaim);
95 sdp = qd->qd_gl->gl_sbd;
96
97 /* Free from the filesystem-specific list */
98 list_del(&qd->qd_list);
99
Abhijith Das0a7ab792009-01-07 16:03:37 -0600100 gfs2_assert_warn(sdp, !qd->qd_change);
101 gfs2_assert_warn(sdp, !qd->qd_slot_count);
102 gfs2_assert_warn(sdp, !qd->qd_bh_count);
103
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000104 gfs2_glock_put(qd->qd_gl);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600105 atomic_dec(&sdp->sd_quota_count);
106
107 /* Delete it from the common reclaim list */
108 list_del_init(&qd->qd_reclaim);
109 atomic_dec(&qd_lru_count);
110 spin_unlock(&qd_lru_lock);
111 kmem_cache_free(gfs2_quotad_cachep, qd);
112 spin_lock(&qd_lru_lock);
113 nr--;
114 }
115 spin_unlock(&qd_lru_lock);
116
117out:
118 return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100;
119}
120
Steven Whitehousecd915492006-09-04 12:49:07 -0400121static u64 qd2offset(struct gfs2_quota_data *qd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000122{
Steven Whitehousecd915492006-09-04 12:49:07 -0400123 u64 offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000124
Steven Whitehousecd915492006-09-04 12:49:07 -0400125 offset = 2 * (u64)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000126 offset *= sizeof(struct gfs2_quota);
127
128 return offset;
129}
130
Steven Whitehousecd915492006-09-04 12:49:07 -0400131static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000132 struct gfs2_quota_data **qdp)
133{
134 struct gfs2_quota_data *qd;
135 int error;
136
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000137 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000138 if (!qd)
139 return -ENOMEM;
140
Abhijith Das0a7ab792009-01-07 16:03:37 -0600141 atomic_set(&qd->qd_count, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000142 qd->qd_id = id;
143 if (user)
144 set_bit(QDF_USER, &qd->qd_flags);
145 qd->qd_slot = -1;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600146 INIT_LIST_HEAD(&qd->qd_reclaim);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000147
Steven Whitehousecd915492006-09-04 12:49:07 -0400148 error = gfs2_glock_get(sdp, 2 * (u64)id + !user,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000149 &gfs2_quota_glops, CREATE, &qd->qd_gl);
150 if (error)
151 goto fail;
152
David Teiglandb3b94fa2006-01-16 16:50:04 +0000153 *qdp = qd;
154
155 return 0;
156
Steven Whitehousea91ea692006-09-04 12:04:26 -0400157fail:
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000158 kmem_cache_free(gfs2_quotad_cachep, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000159 return error;
160}
161
Steven Whitehouse6a6ada82009-09-15 16:30:38 +0100162static int qd_get(struct gfs2_sbd *sdp, int user, u32 id,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000163 struct gfs2_quota_data **qdp)
164{
165 struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
166 int error, found;
167
168 *qdp = NULL;
169
170 for (;;) {
171 found = 0;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600172 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000173 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
174 if (qd->qd_id == id &&
175 !test_bit(QDF_USER, &qd->qd_flags) == !user) {
Abhijith Das0a7ab792009-01-07 16:03:37 -0600176 if (!atomic_read(&qd->qd_count) &&
177 !list_empty(&qd->qd_reclaim)) {
178 /* Remove it from reclaim list */
179 list_del_init(&qd->qd_reclaim);
180 atomic_dec(&qd_lru_count);
181 }
182 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000183 found = 1;
184 break;
185 }
186 }
187
188 if (!found)
189 qd = NULL;
190
191 if (!qd && new_qd) {
192 qd = new_qd;
193 list_add(&qd->qd_list, &sdp->sd_quota_list);
194 atomic_inc(&sdp->sd_quota_count);
195 new_qd = NULL;
196 }
197
Abhijith Das0a7ab792009-01-07 16:03:37 -0600198 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000199
Steven Whitehouse6a6ada82009-09-15 16:30:38 +0100200 if (qd) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000201 if (new_qd) {
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000202 gfs2_glock_put(new_qd->qd_gl);
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000203 kmem_cache_free(gfs2_quotad_cachep, new_qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000204 }
205 *qdp = qd;
206 return 0;
207 }
208
209 error = qd_alloc(sdp, user, id, &new_qd);
210 if (error)
211 return error;
212 }
213}
214
215static void qd_hold(struct gfs2_quota_data *qd)
216{
217 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600218 gfs2_assert(sdp, atomic_read(&qd->qd_count));
219 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000220}
221
222static void qd_put(struct gfs2_quota_data *qd)
223{
Abhijith Das0a7ab792009-01-07 16:03:37 -0600224 if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) {
225 /* Add to the reclaim list */
226 list_add_tail(&qd->qd_reclaim, &qd_lru_list);
227 atomic_inc(&qd_lru_count);
228 spin_unlock(&qd_lru_lock);
229 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000230}
231
232static int slot_get(struct gfs2_quota_data *qd)
233{
234 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
235 unsigned int c, o = 0, b;
236 unsigned char byte = 0;
237
Steven Whitehouse22077f52009-01-08 14:28:42 +0000238 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000239
240 if (qd->qd_slot_count++) {
Steven Whitehouse22077f52009-01-08 14:28:42 +0000241 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000242 return 0;
243 }
244
245 for (c = 0; c < sdp->sd_quota_chunks; c++)
246 for (o = 0; o < PAGE_SIZE; o++) {
247 byte = sdp->sd_quota_bitmap[c][o];
248 if (byte != 0xFF)
249 goto found;
250 }
251
252 goto fail;
253
Steven Whitehousea91ea692006-09-04 12:04:26 -0400254found:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000255 for (b = 0; b < 8; b++)
256 if (!(byte & (1 << b)))
257 break;
258 qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b;
259
260 if (qd->qd_slot >= sdp->sd_quota_slots)
261 goto fail;
262
263 sdp->sd_quota_bitmap[c][o] |= 1 << b;
264
Steven Whitehouse22077f52009-01-08 14:28:42 +0000265 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000266
267 return 0;
268
Steven Whitehousea91ea692006-09-04 12:04:26 -0400269fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000270 qd->qd_slot_count--;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000271 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000272 return -ENOSPC;
273}
274
275static void slot_hold(struct gfs2_quota_data *qd)
276{
277 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
278
Steven Whitehouse22077f52009-01-08 14:28:42 +0000279 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000280 gfs2_assert(sdp, qd->qd_slot_count);
281 qd->qd_slot_count++;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000282 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000283}
284
285static void slot_put(struct gfs2_quota_data *qd)
286{
287 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
288
Steven Whitehouse22077f52009-01-08 14:28:42 +0000289 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000290 gfs2_assert(sdp, qd->qd_slot_count);
291 if (!--qd->qd_slot_count) {
292 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0);
293 qd->qd_slot = -1;
294 }
Steven Whitehouse22077f52009-01-08 14:28:42 +0000295 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000296}
297
298static int bh_get(struct gfs2_quota_data *qd)
299{
300 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400301 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000302 unsigned int block, offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000303 struct buffer_head *bh;
304 int error;
Steven Whitehouse23591252006-10-13 17:25:45 -0400305 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000306
Steven Whitehousef55ab262006-02-21 12:51:39 +0000307 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000308
309 if (qd->qd_bh_count++) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000310 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000311 return 0;
312 }
313
314 block = qd->qd_slot / sdp->sd_qc_per_block;
Bob Peterson0d0868b2007-12-11 18:51:25 -0600315 offset = qd->qd_slot % sdp->sd_qc_per_block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000316
Steven Whitehouse23591252006-10-13 17:25:45 -0400317 bh_map.b_size = 1 << ip->i_inode.i_blkbits;
Bob Petersone9e1ef22007-12-10 14:13:27 -0600318 error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000319 if (error)
320 goto fail;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400321 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000322 if (error)
323 goto fail;
324 error = -EIO;
325 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
326 goto fail_brelse;
327
328 qd->qd_bh = bh;
329 qd->qd_bh_qc = (struct gfs2_quota_change *)
330 (bh->b_data + sizeof(struct gfs2_meta_header) +
331 offset * sizeof(struct gfs2_quota_change));
332
Josef Whiter2e95b662007-02-20 00:03:29 -0500333 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000334
335 return 0;
336
Steven Whitehousea91ea692006-09-04 12:04:26 -0400337fail_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000338 brelse(bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400339fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340 qd->qd_bh_count--;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000341 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000342 return error;
343}
344
345static void bh_put(struct gfs2_quota_data *qd)
346{
347 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
348
Steven Whitehousef55ab262006-02-21 12:51:39 +0000349 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000350 gfs2_assert(sdp, qd->qd_bh_count);
351 if (!--qd->qd_bh_count) {
352 brelse(qd->qd_bh);
353 qd->qd_bh = NULL;
354 qd->qd_bh_qc = NULL;
355 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000356 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000357}
358
359static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
360{
361 struct gfs2_quota_data *qd = NULL;
362 int error;
363 int found = 0;
364
365 *qdp = NULL;
366
367 if (sdp->sd_vfs->s_flags & MS_RDONLY)
368 return 0;
369
Abhijith Das0a7ab792009-01-07 16:03:37 -0600370 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000371
372 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
373 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
374 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
375 qd->qd_sync_gen >= sdp->sd_quota_sync_gen)
376 continue;
377
378 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
379
380 set_bit(QDF_LOCKED, &qd->qd_flags);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600381 gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
382 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000383 qd->qd_change_sync = qd->qd_change;
384 gfs2_assert_warn(sdp, qd->qd_slot_count);
385 qd->qd_slot_count++;
386 found = 1;
387
388 break;
389 }
390
391 if (!found)
392 qd = NULL;
393
Abhijith Das0a7ab792009-01-07 16:03:37 -0600394 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000395
396 if (qd) {
397 gfs2_assert_warn(sdp, qd->qd_change_sync);
398 error = bh_get(qd);
399 if (error) {
400 clear_bit(QDF_LOCKED, &qd->qd_flags);
401 slot_put(qd);
402 qd_put(qd);
403 return error;
404 }
405 }
406
407 *qdp = qd;
408
409 return 0;
410}
411
412static int qd_trylock(struct gfs2_quota_data *qd)
413{
414 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
415
416 if (sdp->sd_vfs->s_flags & MS_RDONLY)
417 return 0;
418
Abhijith Das0a7ab792009-01-07 16:03:37 -0600419 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000420
421 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
422 !test_bit(QDF_CHANGE, &qd->qd_flags)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -0600423 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000424 return 0;
425 }
426
427 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
428
429 set_bit(QDF_LOCKED, &qd->qd_flags);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600430 gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
431 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000432 qd->qd_change_sync = qd->qd_change;
433 gfs2_assert_warn(sdp, qd->qd_slot_count);
434 qd->qd_slot_count++;
435
Abhijith Das0a7ab792009-01-07 16:03:37 -0600436 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000437
438 gfs2_assert_warn(sdp, qd->qd_change_sync);
439 if (bh_get(qd)) {
440 clear_bit(QDF_LOCKED, &qd->qd_flags);
441 slot_put(qd);
442 qd_put(qd);
443 return 0;
444 }
445
446 return 1;
447}
448
449static void qd_unlock(struct gfs2_quota_data *qd)
450{
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500451 gfs2_assert_warn(qd->qd_gl->gl_sbd,
452 test_bit(QDF_LOCKED, &qd->qd_flags));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000453 clear_bit(QDF_LOCKED, &qd->qd_flags);
454 bh_put(qd);
455 slot_put(qd);
456 qd_put(qd);
457}
458
Steven Whitehouse33a82522009-09-15 16:25:40 +0100459static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000460 struct gfs2_quota_data **qdp)
461{
462 int error;
463
Steven Whitehouse6a6ada82009-09-15 16:30:38 +0100464 error = qd_get(sdp, user, id, qdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000465 if (error)
466 return error;
467
468 error = slot_get(*qdp);
469 if (error)
470 goto fail;
471
472 error = bh_get(*qdp);
473 if (error)
474 goto fail_slot;
475
476 return 0;
477
Steven Whitehousea91ea692006-09-04 12:04:26 -0400478fail_slot:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000479 slot_put(*qdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400480fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000481 qd_put(*qdp);
482 return error;
483}
484
485static void qdsb_put(struct gfs2_quota_data *qd)
486{
487 bh_put(qd);
488 slot_put(qd);
489 qd_put(qd);
490}
491
Steven Whitehousecd915492006-09-04 12:49:07 -0400492int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000493{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400494 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000495 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000496 struct gfs2_quota_data **qd = al->al_qd;
497 int error;
498
499 if (gfs2_assert_warn(sdp, !al->al_qd_num) ||
500 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
501 return -EIO;
502
503 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
504 return 0;
505
Steven Whitehouse33a82522009-09-15 16:25:40 +0100506 error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000507 if (error)
508 goto out;
509 al->al_qd_num++;
510 qd++;
511
Steven Whitehouse33a82522009-09-15 16:25:40 +0100512 error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000513 if (error)
514 goto out;
515 al->al_qd_num++;
516 qd++;
517
Steven Whitehouse2933f922006-11-01 13:23:29 -0500518 if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) {
Steven Whitehouse33a82522009-09-15 16:25:40 +0100519 error = qdsb_get(sdp, QUOTA_USER, uid, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000520 if (error)
521 goto out;
522 al->al_qd_num++;
523 qd++;
524 }
525
Steven Whitehouse2933f922006-11-01 13:23:29 -0500526 if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) {
Steven Whitehouse33a82522009-09-15 16:25:40 +0100527 error = qdsb_get(sdp, QUOTA_GROUP, gid, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000528 if (error)
529 goto out;
530 al->al_qd_num++;
531 qd++;
532 }
533
Steven Whitehousea91ea692006-09-04 12:04:26 -0400534out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000535 if (error)
536 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000537 return error;
538}
539
540void gfs2_quota_unhold(struct gfs2_inode *ip)
541{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400542 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000543 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000544 unsigned int x;
545
546 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
547
548 for (x = 0; x < al->al_qd_num; x++) {
549 qdsb_put(al->al_qd[x]);
550 al->al_qd[x] = NULL;
551 }
552 al->al_qd_num = 0;
553}
554
555static int sort_qd(const void *a, const void *b)
556{
Steven Whitehouse48fac172006-09-05 15:17:12 -0400557 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
558 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000559
560 if (!test_bit(QDF_USER, &qd_a->qd_flags) !=
561 !test_bit(QDF_USER, &qd_b->qd_flags)) {
562 if (test_bit(QDF_USER, &qd_a->qd_flags))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400563 return -1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000564 else
Steven Whitehouse48fac172006-09-05 15:17:12 -0400565 return 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000566 }
Steven Whitehouse48fac172006-09-05 15:17:12 -0400567 if (qd_a->qd_id < qd_b->qd_id)
568 return -1;
569 if (qd_a->qd_id > qd_b->qd_id)
570 return 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000571
Steven Whitehouse48fac172006-09-05 15:17:12 -0400572 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000573}
574
Steven Whitehousecd915492006-09-04 12:49:07 -0400575static void do_qc(struct gfs2_quota_data *qd, s64 change)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000576{
577 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400578 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000579 struct gfs2_quota_change *qc = qd->qd_bh_qc;
Steven Whitehousecd915492006-09-04 12:49:07 -0400580 s64 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000581
Steven Whitehousef55ab262006-02-21 12:51:39 +0000582 mutex_lock(&sdp->sd_quota_mutex);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000583 gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000584
585 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
586 qc->qc_change = 0;
587 qc->qc_flags = 0;
588 if (test_bit(QDF_USER, &qd->qd_flags))
589 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
590 qc->qc_id = cpu_to_be32(qd->qd_id);
591 }
592
Al Virob44b84d2006-10-14 10:46:30 -0400593 x = be64_to_cpu(qc->qc_change) + change;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 qc->qc_change = cpu_to_be64(x);
595
Steven Whitehouse22077f52009-01-08 14:28:42 +0000596 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000597 qd->qd_change = x;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000598 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000599
600 if (!x) {
601 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
602 clear_bit(QDF_CHANGE, &qd->qd_flags);
603 qc->qc_flags = 0;
604 qc->qc_id = 0;
605 slot_put(qd);
606 qd_put(qd);
607 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
608 qd_hold(qd);
609 slot_hold(qd);
610 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400611
Steven Whitehousef55ab262006-02-21 12:51:39 +0000612 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000613}
614
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000615/**
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100616 * gfs2_adjust_quota - adjust record of current block usage
617 * @ip: The quota inode
618 * @loc: Offset of the entry in the quota file
Steven Whitehousee285c102009-09-23 13:50:49 +0100619 * @change: The amount of usage change to record
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100620 * @qd: The quota data
Steven Whitehousee285c102009-09-23 13:50:49 +0100621 * @fdq: The updated limits to record
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000622 *
623 * This function was mostly borrowed from gfs2_block_truncate_page which was
624 * in turn mostly borrowed from ext3
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100625 *
626 * Returns: 0 or -ve on error
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000627 */
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100628
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000629static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
Steven Whitehousee285c102009-09-23 13:50:49 +0100630 s64 change, struct gfs2_quota_data *qd,
631 struct fs_disk_quota *fdq)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000632{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400633 struct inode *inode = &ip->i_inode;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000634 struct address_space *mapping = inode->i_mapping;
635 unsigned long index = loc >> PAGE_CACHE_SHIFT;
Abhijith Das1990e912007-05-31 17:52:02 -0500636 unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000637 unsigned blocksize, iblock, pos;
Steven Whitehousee285c102009-09-23 13:50:49 +0100638 struct buffer_head *bh, *dibh;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000639 struct page *page;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400640 void *kaddr, *ptr;
641 struct gfs2_quota q, *qp;
642 int err, nbytes;
Steven Whitehousee285c102009-09-23 13:50:49 +0100643 u64 size;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000644
Abhijith Das20b95bf2008-03-06 17:43:52 -0600645 if (gfs2_is_stuffed(ip))
Abhijith Das0fd53552007-08-14 15:34:58 -0500646 gfs2_unstuff_dinode(ip, NULL);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400647
648 memset(&q, 0, sizeof(struct gfs2_quota));
649 err = gfs2_internal_read(ip, NULL, (char *)&q, &loc, sizeof(q));
650 if (err < 0)
651 return err;
652
653 err = -EIO;
654 qp = &q;
655 qp->qu_value = be64_to_cpu(qp->qu_value);
656 qp->qu_value += change;
657 qp->qu_value = cpu_to_be64(qp->qu_value);
658 qd->qd_qb.qb_value = qp->qu_value;
659 if (fdq) {
660 if (fdq->d_fieldmask & FS_DQ_BSOFT) {
661 qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit);
662 qd->qd_qb.qb_warn = qp->qu_warn;
663 }
664 if (fdq->d_fieldmask & FS_DQ_BHARD) {
665 qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit);
666 qd->qd_qb.qb_limit = qp->qu_limit;
667 }
668 }
669
670 /* Write the quota into the quota file on disk */
671 ptr = qp;
672 nbytes = sizeof(struct gfs2_quota);
673get_a_page:
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000674 page = grab_cache_page(mapping, index);
675 if (!page)
676 return -ENOMEM;
677
678 blocksize = inode->i_sb->s_blocksize;
679 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
680
681 if (!page_has_buffers(page))
682 create_empty_buffers(page, blocksize, 0);
683
684 bh = page_buffers(page);
685 pos = blocksize;
686 while (offset >= pos) {
687 bh = bh->b_this_page;
688 iblock++;
689 pos += blocksize;
690 }
691
692 if (!buffer_mapped(bh)) {
Bob Petersone9e1ef22007-12-10 14:13:27 -0600693 gfs2_block_map(inode, iblock, bh, 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000694 if (!buffer_mapped(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400695 goto unlock_out;
696 /* If it's a newly allocated disk block for quota, zero it */
Abhijith Das8b421602010-07-04 01:33:24 -0400697 if (buffer_new(bh))
698 zero_user(page, pos - blocksize, bh->b_size);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000699 }
700
701 if (PageUptodate(page))
702 set_buffer_uptodate(bh);
703
704 if (!buffer_uptodate(bh)) {
Steven Whitehouse2e565bb2006-10-02 11:38:25 -0400705 ll_rw_block(READ_META, 1, &bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000706 wait_on_buffer(bh);
707 if (!buffer_uptodate(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400708 goto unlock_out;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000709 }
710
711 gfs2_trans_add_bh(ip->i_gl, bh, 0);
712
713 kaddr = kmap_atomic(page, KM_USER0);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400714 if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
715 nbytes = PAGE_CACHE_SIZE - offset;
716 memcpy(kaddr + offset, ptr, nbytes);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000717 flush_dcache_page(page);
718 kunmap_atomic(kaddr, KM_USER0);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400719 unlock_page(page);
720 page_cache_release(page);
Steven Whitehousee285c102009-09-23 13:50:49 +0100721
Abhijith Das7e619bc2010-05-07 17:50:18 -0400722 /* If quota straddles page boundary, we need to update the rest of the
723 * quota at the beginning of the next page */
Abhijith Das8b421602010-07-04 01:33:24 -0400724 if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
Abhijith Das7e619bc2010-05-07 17:50:18 -0400725 ptr = ptr + nbytes;
726 nbytes = sizeof(struct gfs2_quota) - nbytes;
727 offset = 0;
728 index++;
729 goto get_a_page;
730 }
731
732 /* Update the disk inode timestamp and size (if extended) */
Steven Whitehousee285c102009-09-23 13:50:49 +0100733 err = gfs2_meta_inode_buffer(ip, &dibh);
734 if (err)
Abhijith Das7e619bc2010-05-07 17:50:18 -0400735 goto out;
Steven Whitehousee285c102009-09-23 13:50:49 +0100736
737 size = loc + sizeof(struct gfs2_quota);
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100738 if (size > inode->i_size)
Steven Whitehousee285c102009-09-23 13:50:49 +0100739 i_size_write(inode, size);
Steven Whitehousee285c102009-09-23 13:50:49 +0100740 inode->i_mtime = inode->i_atime = CURRENT_TIME;
741 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
742 gfs2_dinode_out(ip, dibh->b_data);
743 brelse(dibh);
744 mark_inode_dirty(inode);
745
Abhijith Das7e619bc2010-05-07 17:50:18 -0400746out:
747 return err;
748unlock_out:
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000749 unlock_page(page);
750 page_cache_release(page);
751 return err;
752}
753
David Teiglandb3b94fa2006-01-16 16:50:04 +0000754static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
755{
756 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400757 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000758 unsigned int data_blocks, ind_blocks;
759 struct gfs2_holder *ghs, i_gh;
760 unsigned int qx, x;
761 struct gfs2_quota_data *qd;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000762 loff_t offset;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600763 unsigned int nalloc = 0, blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000764 struct gfs2_alloc *al = NULL;
765 int error;
766
767 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
768 &data_blocks, &ind_blocks);
769
Josef Bacik16c5f062008-04-09 09:33:41 -0400770 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000771 if (!ghs)
772 return -ENOMEM;
773
774 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
Steven Whitehousee285c102009-09-23 13:50:49 +0100775 mutex_lock_nested(&ip->i_inode.i_mutex, I_MUTEX_QUOTA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000776 for (qx = 0; qx < num_qd; qx++) {
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100777 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000778 GL_NOCACHE, &ghs[qx]);
779 if (error)
780 goto out;
781 }
782
783 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
784 if (error)
785 goto out;
786
787 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000788 offset = qd2offset(qda[x]);
Bob Peterson461cb412010-06-24 19:21:20 -0400789 if (gfs2_write_alloc_required(ip, offset,
790 sizeof(struct gfs2_quota)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000791 nalloc++;
792 }
793
Abhijith Das20b95bf2008-03-06 17:43:52 -0600794 al = gfs2_alloc_get(ip);
795 if (!al) {
796 error = -ENOMEM;
797 goto out_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000798 }
Abhijith Das20b95bf2008-03-06 17:43:52 -0600799 /*
800 * 1 blk for unstuffing inode if stuffed. We add this extra
801 * block to the reservation unconditionally. If the inode
802 * doesn't need unstuffing, the block will be released to the
803 * rgrp since it won't be allocated during the transaction
804 */
805 al->al_requested = 1;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400806 /* +3 in the end for unstuffing block, inode size update block
807 * and another block in case quota straddles page boundary and
808 * two blocks need to be updated instead of 1 */
809 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600810
811 if (nalloc)
812 al->al_requested += nalloc * (data_blocks + ind_blocks);
813 error = gfs2_inplace_reserve(ip);
814 if (error)
815 goto out_alloc;
816
817 if (nalloc)
Benjamin Marzinskibf97b672010-09-27 16:00:04 -0500818 blocks += gfs2_rg_blocks(al) + nalloc * ind_blocks + RES_STATFS;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600819
820 error = gfs2_trans_begin(sdp, blocks, 0);
821 if (error)
822 goto out_ipres;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000823
824 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000825 qd = qda[x];
826 offset = qd2offset(qd);
Steven Whitehousee285c102009-09-23 13:50:49 +0100827 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000828 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000829 goto out_end_trans;
830
David Teiglandb3b94fa2006-01-16 16:50:04 +0000831 do_qc(qd, -qd->qd_change_sync);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000832 }
833
834 error = 0;
835
Steven Whitehousea91ea692006-09-04 12:04:26 -0400836out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000837 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400838out_ipres:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600839 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400840out_alloc:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600841 gfs2_alloc_put(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400842out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000843 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400844out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000845 while (qx--)
846 gfs2_glock_dq_uninit(&ghs[qx]);
Steven Whitehousee285c102009-09-23 13:50:49 +0100847 mutex_unlock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000848 kfree(ghs);
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400849 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000850 return error;
851}
852
Steven Whitehousee285c102009-09-23 13:50:49 +0100853static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
854{
855 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
856 struct gfs2_quota q;
857 struct gfs2_quota_lvb *qlvb;
858 loff_t pos;
859 int error;
860
861 memset(&q, 0, sizeof(struct gfs2_quota));
862 pos = qd2offset(qd);
863 error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q));
864 if (error < 0)
865 return error;
866
867 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
868 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
869 qlvb->__pad = 0;
870 qlvb->qb_limit = q.qu_limit;
871 qlvb->qb_warn = q.qu_warn;
872 qlvb->qb_value = q.qu_value;
873 qd->qd_qb = *qlvb;
874
875 return 0;
876}
877
David Teiglandb3b94fa2006-01-16 16:50:04 +0000878static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
879 struct gfs2_holder *q_gh)
880{
881 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400882 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000883 struct gfs2_holder i_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000884 int error;
885
Steven Whitehousea91ea692006-09-04 12:04:26 -0400886restart:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000887 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
888 if (error)
889 return error;
890
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400891 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000892
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400893 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894 gfs2_glock_dq_uninit(q_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100895 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
896 GL_NOCACHE, q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000897 if (error)
898 return error;
899
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400900 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000901 if (error)
902 goto fail;
903
Steven Whitehousee285c102009-09-23 13:50:49 +0100904 error = update_qd(sdp, qd);
905 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000906 goto fail_gunlock;
Steven Whitehousee285c102009-09-23 13:50:49 +0100907
David Teiglandb3b94fa2006-01-16 16:50:04 +0000908 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100909 gfs2_glock_dq_uninit(q_gh);
910 force_refresh = 0;
911 goto restart;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000912 }
913
914 return 0;
915
Steven Whitehousea91ea692006-09-04 12:04:26 -0400916fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000917 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400918fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000919 gfs2_glock_dq_uninit(q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000920 return error;
921}
922
Steven Whitehousecd915492006-09-04 12:49:07 -0400923int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000924{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400925 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000926 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927 unsigned int x;
928 int error = 0;
929
930 gfs2_quota_hold(ip, uid, gid);
931
932 if (capable(CAP_SYS_RESOURCE) ||
933 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
934 return 0;
935
936 sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *),
937 sort_qd, NULL);
938
939 for (x = 0; x < al->al_qd_num; x++) {
940 error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]);
941 if (error)
942 break;
943 }
944
945 if (!error)
946 set_bit(GIF_QD_LOCKED, &ip->i_flags);
947 else {
948 while (x--)
949 gfs2_glock_dq_uninit(&al->al_qd_ghs[x]);
950 gfs2_quota_unhold(ip);
951 }
952
953 return error;
954}
955
956static int need_sync(struct gfs2_quota_data *qd)
957{
958 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
959 struct gfs2_tune *gt = &sdp->sd_tune;
Steven Whitehousecd915492006-09-04 12:49:07 -0400960 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000961 unsigned int num, den;
962 int do_sync = 1;
963
964 if (!qd->qd_qb.qb_limit)
965 return 0;
966
Steven Whitehouse22077f52009-01-08 14:28:42 +0000967 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000968 value = qd->qd_change;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000969 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000970
971 spin_lock(&gt->gt_spin);
972 num = gt->gt_quota_scale_num;
973 den = gt->gt_quota_scale_den;
974 spin_unlock(&gt->gt_spin);
975
976 if (value < 0)
977 do_sync = 0;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400978 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
979 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000980 do_sync = 0;
981 else {
982 value *= gfs2_jindex_size(sdp) * num;
David Howells4abaca172008-07-11 14:39:56 +0100983 value = div_s64(value, den);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400984 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehousecd915492006-09-04 12:49:07 -0400985 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000986 do_sync = 0;
987 }
988
989 return do_sync;
990}
991
992void gfs2_quota_unlock(struct gfs2_inode *ip)
993{
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000994 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000995 struct gfs2_quota_data *qda[4];
996 unsigned int count = 0;
997 unsigned int x;
998
999 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1000 goto out;
1001
1002 for (x = 0; x < al->al_qd_num; x++) {
1003 struct gfs2_quota_data *qd;
1004 int sync;
1005
1006 qd = al->al_qd[x];
1007 sync = need_sync(qd);
1008
1009 gfs2_glock_dq_uninit(&al->al_qd_ghs[x]);
1010
1011 if (sync && qd_trylock(qd))
1012 qda[count++] = qd;
1013 }
1014
1015 if (count) {
1016 do_sync(count, qda);
1017 for (x = 0; x < count; x++)
1018 qd_unlock(qda[x]);
1019 }
1020
Steven Whitehousea91ea692006-09-04 12:04:26 -04001021out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001022 gfs2_quota_unhold(ip);
1023}
1024
1025#define MAX_LINE 256
1026
1027static int print_message(struct gfs2_quota_data *qd, char *type)
1028{
1029 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001030
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001031 printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n",
Steven Whitehouse02630a12006-07-03 11:20:06 -04001032 sdp->sd_fsname, type,
1033 (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group",
1034 qd->qd_id);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001035
1036 return 0;
1037}
1038
Steven Whitehousecd915492006-09-04 12:49:07 -04001039int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001040{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001041 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001042 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001043 struct gfs2_quota_data *qd;
Steven Whitehousecd915492006-09-04 12:49:07 -04001044 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001045 unsigned int x;
1046 int error = 0;
1047
1048 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1049 return 0;
1050
1051 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1052 return 0;
1053
1054 for (x = 0; x < al->al_qd_num; x++) {
1055 qd = al->al_qd[x];
1056
1057 if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) ||
1058 (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))))
1059 continue;
1060
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001061 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehouse22077f52009-01-08 14:28:42 +00001062 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001063 value += qd->qd_change;
Steven Whitehouse22077f52009-01-08 14:28:42 +00001064 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001065
Steven Whitehousecd915492006-09-04 12:49:07 -04001066 if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001067 print_message(qd, "exceeded");
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001068 quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ?
1069 USRQUOTA : GRPQUOTA, qd->qd_id,
1070 sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
1071
David Teiglandb3b94fa2006-01-16 16:50:04 +00001072 error = -EDQUOT;
1073 break;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001074 } else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
Steven Whitehousecd915492006-09-04 12:49:07 -04001075 (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
David Teiglandb3b94fa2006-01-16 16:50:04 +00001076 time_after_eq(jiffies, qd->qd_last_warn +
Steven Whitehouse568f4c92006-02-27 12:00:42 -05001077 gfs2_tune_get(sdp,
1078 gt_quota_warn_period) * HZ)) {
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001079 quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ?
1080 USRQUOTA : GRPQUOTA, qd->qd_id,
1081 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001082 error = print_message(qd, "warning");
1083 qd->qd_last_warn = jiffies;
1084 }
1085 }
1086
1087 return error;
1088}
1089
Steven Whitehousecd915492006-09-04 12:49:07 -04001090void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1091 u32 uid, u32 gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001092{
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001093 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001094 struct gfs2_quota_data *qd;
1095 unsigned int x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001096
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001097 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001098 return;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001099 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001100 return;
1101
1102 for (x = 0; x < al->al_qd_num; x++) {
1103 qd = al->al_qd[x];
1104
1105 if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) ||
1106 (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) {
1107 do_qc(qd, change);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001108 }
1109 }
1110}
1111
Christoph Hellwig5fb324a2010-02-16 03:44:52 -05001112int gfs2_quota_sync(struct super_block *sb, int type, int wait)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001113{
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001114 struct gfs2_sbd *sdp = sb->s_fs_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001115 struct gfs2_quota_data **qda;
1116 unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
1117 unsigned int num_qd;
1118 unsigned int x;
1119 int error = 0;
1120
1121 sdp->sd_quota_sync_gen++;
1122
1123 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1124 if (!qda)
1125 return -ENOMEM;
1126
1127 do {
1128 num_qd = 0;
1129
1130 for (;;) {
1131 error = qd_fish(sdp, qda + num_qd);
1132 if (error || !qda[num_qd])
1133 break;
1134 if (++num_qd == max_qd)
1135 break;
1136 }
1137
1138 if (num_qd) {
1139 if (!error)
1140 error = do_sync(num_qd, qda);
1141 if (!error)
1142 for (x = 0; x < num_qd; x++)
1143 qda[x]->qd_sync_gen =
1144 sdp->sd_quota_sync_gen;
1145
1146 for (x = 0; x < num_qd; x++)
1147 qd_unlock(qda[x]);
1148 }
1149 } while (!error && num_qd == max_qd);
1150
1151 kfree(qda);
1152
1153 return error;
1154}
1155
Christoph Hellwig5fb324a2010-02-16 03:44:52 -05001156static int gfs2_quota_sync_timeo(struct super_block *sb, int type)
1157{
1158 return gfs2_quota_sync(sb, type, 0);
1159}
1160
Steven Whitehousecd915492006-09-04 12:49:07 -04001161int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001162{
1163 struct gfs2_quota_data *qd;
1164 struct gfs2_holder q_gh;
1165 int error;
1166
Steven Whitehouse6a6ada82009-09-15 16:30:38 +01001167 error = qd_get(sdp, user, id, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001168 if (error)
1169 return error;
1170
1171 error = do_glock(qd, FORCE, &q_gh);
1172 if (!error)
1173 gfs2_glock_dq_uninit(&q_gh);
1174
1175 qd_put(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001176 return error;
1177}
1178
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001179static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf)
1180{
1181 const struct gfs2_quota_change *str = buf;
1182
1183 qc->qc_change = be64_to_cpu(str->qc_change);
1184 qc->qc_flags = be32_to_cpu(str->qc_flags);
1185 qc->qc_id = be32_to_cpu(str->qc_id);
1186}
1187
David Teiglandb3b94fa2006-01-16 16:50:04 +00001188int gfs2_quota_init(struct gfs2_sbd *sdp)
1189{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001190 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001191 u64 size = i_size_read(sdp->sd_qc_inode);
1192 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001193 unsigned int x, slot = 0;
1194 unsigned int found = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001195 u64 dblock;
1196 u32 extlen = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001197 int error;
1198
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001199 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001200 return -EIO;
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001201
David Teiglandb3b94fa2006-01-16 16:50:04 +00001202 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001203 sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001204
1205 error = -ENOMEM;
1206
1207 sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks,
Josef Bacik16c5f062008-04-09 09:33:41 -04001208 sizeof(unsigned char *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001209 if (!sdp->sd_quota_bitmap)
1210 return error;
1211
1212 for (x = 0; x < sdp->sd_quota_chunks; x++) {
Josef Bacik16c5f062008-04-09 09:33:41 -04001213 sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001214 if (!sdp->sd_quota_bitmap[x])
1215 goto fail;
1216 }
1217
1218 for (x = 0; x < blocks; x++) {
1219 struct buffer_head *bh;
1220 unsigned int y;
1221
1222 if (!extlen) {
1223 int new = 0;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001224 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001225 if (error)
1226 goto fail;
1227 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001228 error = -EIO;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001229 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1230 if (!bh)
1231 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001232 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1233 brelse(bh);
1234 goto fail;
1235 }
1236
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001237 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001238 y++, slot++) {
Al Virob62f9632006-10-13 23:46:46 -04001239 struct gfs2_quota_change_host qc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001240 struct gfs2_quota_data *qd;
1241
1242 gfs2_quota_change_in(&qc, bh->b_data +
1243 sizeof(struct gfs2_meta_header) +
1244 y * sizeof(struct gfs2_quota_change));
1245 if (!qc.qc_change)
1246 continue;
1247
1248 error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER),
1249 qc.qc_id, &qd);
1250 if (error) {
1251 brelse(bh);
1252 goto fail;
1253 }
1254
1255 set_bit(QDF_CHANGE, &qd->qd_flags);
1256 qd->qd_change = qc.qc_change;
1257 qd->qd_slot = slot;
1258 qd->qd_slot_count = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001259
Abhijith Das0a7ab792009-01-07 16:03:37 -06001260 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001261 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1);
1262 list_add(&qd->qd_list, &sdp->sd_quota_list);
1263 atomic_inc(&sdp->sd_quota_count);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001264 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001265
1266 found++;
1267 }
1268
1269 brelse(bh);
1270 dblock++;
1271 extlen--;
1272 }
1273
1274 if (found)
1275 fs_info(sdp, "found %u quota changes\n", found);
1276
1277 return 0;
1278
Steven Whitehousea91ea692006-09-04 12:04:26 -04001279fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001280 gfs2_quota_cleanup(sdp);
1281 return error;
1282}
1283
David Teiglandb3b94fa2006-01-16 16:50:04 +00001284void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1285{
1286 struct list_head *head = &sdp->sd_quota_list;
1287 struct gfs2_quota_data *qd;
1288 unsigned int x;
1289
Abhijith Das0a7ab792009-01-07 16:03:37 -06001290 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001291 while (!list_empty(head)) {
1292 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1293
Abhijith Das0a7ab792009-01-07 16:03:37 -06001294 if (atomic_read(&qd->qd_count) > 1 ||
1295 (atomic_read(&qd->qd_count) &&
1296 !test_bit(QDF_CHANGE, &qd->qd_flags))) {
Abhijith Das0a7ab792009-01-07 16:03:37 -06001297 list_move(&qd->qd_list, head);
1298 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001299 schedule();
Abhijith Das0a7ab792009-01-07 16:03:37 -06001300 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001301 continue;
1302 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001303
Abhijith Das0a7ab792009-01-07 16:03:37 -06001304 list_del(&qd->qd_list);
1305 /* Also remove if this qd exists in the reclaim list */
1306 if (!list_empty(&qd->qd_reclaim)) {
1307 list_del_init(&qd->qd_reclaim);
1308 atomic_dec(&qd_lru_count);
1309 }
1310 atomic_dec(&sdp->sd_quota_count);
1311 spin_unlock(&qd_lru_lock);
1312
1313 if (!atomic_read(&qd->qd_count)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001314 gfs2_assert_warn(sdp, !qd->qd_change);
1315 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1316 } else
1317 gfs2_assert_warn(sdp, qd->qd_slot_count == 1);
1318 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1319
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001320 gfs2_glock_put(qd->qd_gl);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001321 kmem_cache_free(gfs2_quotad_cachep, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001322
Abhijith Das0a7ab792009-01-07 16:03:37 -06001323 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001324 }
Abhijith Das0a7ab792009-01-07 16:03:37 -06001325 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001326
1327 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1328
1329 if (sdp->sd_quota_bitmap) {
1330 for (x = 0; x < sdp->sd_quota_chunks; x++)
1331 kfree(sdp->sd_quota_bitmap[x]);
1332 kfree(sdp->sd_quota_bitmap);
1333 }
1334}
1335
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001336static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1337{
1338 if (error == 0 || error == -EROFS)
1339 return;
1340 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1341 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1342}
1343
1344static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001345 int (*fxn)(struct super_block *sb, int type),
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001346 unsigned long t, unsigned long *timeo,
1347 unsigned int *new_timeo)
1348{
1349 if (t >= *timeo) {
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001350 int error = fxn(sdp->sd_vfs, 0);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001351 quotad_error(sdp, msg, error);
1352 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1353 } else {
1354 *timeo -= t;
1355 }
1356}
1357
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001358static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1359{
1360 struct gfs2_inode *ip;
1361
1362 while(1) {
1363 ip = NULL;
1364 spin_lock(&sdp->sd_trunc_lock);
1365 if (!list_empty(&sdp->sd_trunc_list)) {
1366 ip = list_entry(sdp->sd_trunc_list.next,
1367 struct gfs2_inode, i_trunc_list);
1368 list_del_init(&ip->i_trunc_list);
1369 }
1370 spin_unlock(&sdp->sd_trunc_lock);
1371 if (ip == NULL)
1372 return;
1373 gfs2_glock_finish_truncate(ip);
1374 }
1375}
1376
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001377void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1378 if (!sdp->sd_statfs_force_sync) {
1379 sdp->sd_statfs_force_sync = 1;
1380 wake_up(&sdp->sd_quota_wait);
1381 }
1382}
1383
1384
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001385/**
1386 * gfs2_quotad - Write cached quota changes into the quota file
1387 * @sdp: Pointer to GFS2 superblock
1388 *
1389 */
1390
1391int gfs2_quotad(void *data)
1392{
1393 struct gfs2_sbd *sdp = data;
1394 struct gfs2_tune *tune = &sdp->sd_tune;
1395 unsigned long statfs_timeo = 0;
1396 unsigned long quotad_timeo = 0;
1397 unsigned long t = 0;
1398 DEFINE_WAIT(wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001399 int empty;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001400
1401 while (!kthread_should_stop()) {
1402
1403 /* Update the master statfs file */
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001404 if (sdp->sd_statfs_force_sync) {
1405 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1406 quotad_error(sdp, "statfs", error);
1407 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1408 }
1409 else
1410 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1411 &statfs_timeo,
1412 &tune->gt_statfs_quantum);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001413
1414 /* Update quota file */
Christoph Hellwig5fb324a2010-02-16 03:44:52 -05001415 quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t,
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001416 &quotad_timeo, &tune->gt_quota_quantum);
1417
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001418 /* Check for & recover partially truncated inodes */
1419 quotad_check_trunc_list(sdp);
1420
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001421 if (freezing(current))
1422 refrigerator();
1423 t = min(quotad_timeo, statfs_timeo);
1424
Steven Whitehouse7fa5d202009-03-31 15:49:08 +01001425 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001426 spin_lock(&sdp->sd_trunc_lock);
1427 empty = list_empty(&sdp->sd_trunc_list);
1428 spin_unlock(&sdp->sd_trunc_lock);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001429 if (empty && !sdp->sd_statfs_force_sync)
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001430 t -= schedule_timeout(t);
1431 else
1432 t = 0;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001433 finish_wait(&sdp->sd_quota_wait, &wait);
1434 }
1435
1436 return 0;
1437}
1438
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001439static int gfs2_quota_get_xstate(struct super_block *sb,
1440 struct fs_quota_stat *fqs)
1441{
1442 struct gfs2_sbd *sdp = sb->s_fs_info;
1443
1444 memset(fqs, 0, sizeof(struct fs_quota_stat));
1445 fqs->qs_version = FS_QSTAT_VERSION;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001446
1447 switch (sdp->sd_args.ar_quota) {
1448 case GFS2_QUOTA_ON:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001449 fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001450 /*FALLTHRU*/
1451 case GFS2_QUOTA_ACCOUNT:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001452 fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001453 break;
1454 case GFS2_QUOTA_OFF:
1455 break;
1456 }
1457
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001458 if (sdp->sd_quota_inode) {
1459 fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1460 fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
1461 }
1462 fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
1463 fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
1464 fqs->qs_incoredqs = atomic_read(&qd_lru_count);
1465 return 0;
1466}
1467
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001468static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id,
1469 struct fs_disk_quota *fdq)
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001470{
1471 struct gfs2_sbd *sdp = sb->s_fs_info;
1472 struct gfs2_quota_lvb *qlvb;
1473 struct gfs2_quota_data *qd;
1474 struct gfs2_holder q_gh;
1475 int error;
1476
1477 memset(fdq, 0, sizeof(struct fs_disk_quota));
1478
1479 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1480 return -ESRCH; /* Crazy XFS error code */
1481
1482 if (type == USRQUOTA)
1483 type = QUOTA_USER;
1484 else if (type == GRPQUOTA)
1485 type = QUOTA_GROUP;
1486 else
1487 return -EINVAL;
1488
1489 error = qd_get(sdp, type, id, &qd);
1490 if (error)
1491 return error;
1492 error = do_glock(qd, FORCE, &q_gh);
1493 if (error)
1494 goto out;
1495
1496 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
1497 fdq->d_version = FS_DQUOT_VERSION;
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001498 fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001499 fdq->d_id = id;
1500 fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit);
1501 fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn);
1502 fdq->d_bcount = be64_to_cpu(qlvb->qb_value);
1503
1504 gfs2_glock_dq_uninit(&q_gh);
1505out:
1506 qd_put(qd);
1507 return error;
1508}
1509
Steven Whitehousee285c102009-09-23 13:50:49 +01001510/* GFS2 only supports a subset of the XFS fields */
1511#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD)
1512
Christoph Hellwigc472b432010-05-06 17:05:17 -04001513static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
1514 struct fs_disk_quota *fdq)
Steven Whitehousee285c102009-09-23 13:50:49 +01001515{
1516 struct gfs2_sbd *sdp = sb->s_fs_info;
1517 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1518 struct gfs2_quota_data *qd;
1519 struct gfs2_holder q_gh, i_gh;
1520 unsigned int data_blocks, ind_blocks;
1521 unsigned int blocks = 0;
1522 int alloc_required;
1523 struct gfs2_alloc *al;
1524 loff_t offset;
1525 int error;
1526
1527 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1528 return -ESRCH; /* Crazy XFS error code */
1529
1530 switch(type) {
1531 case USRQUOTA:
1532 type = QUOTA_USER;
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001533 if (fdq->d_flags != FS_USER_QUOTA)
Steven Whitehousee285c102009-09-23 13:50:49 +01001534 return -EINVAL;
1535 break;
1536 case GRPQUOTA:
1537 type = QUOTA_GROUP;
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001538 if (fdq->d_flags != FS_GROUP_QUOTA)
Steven Whitehousee285c102009-09-23 13:50:49 +01001539 return -EINVAL;
1540 break;
1541 default:
1542 return -EINVAL;
1543 }
1544
1545 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1546 return -EINVAL;
1547 if (fdq->d_id != id)
1548 return -EINVAL;
1549
1550 error = qd_get(sdp, type, id, &qd);
1551 if (error)
1552 return error;
1553
1554 mutex_lock(&ip->i_inode.i_mutex);
1555 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1556 if (error)
1557 goto out_put;
1558 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1559 if (error)
1560 goto out_q;
1561
1562 /* Check for existing entry, if none then alloc new blocks */
1563 error = update_qd(sdp, qd);
1564 if (error)
1565 goto out_i;
1566
1567 /* If nothing has changed, this is a no-op */
1568 if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
1569 (fdq->d_blk_softlimit == be64_to_cpu(qd->qd_qb.qb_warn)))
1570 fdq->d_fieldmask ^= FS_DQ_BSOFT;
1571 if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
1572 (fdq->d_blk_hardlimit == be64_to_cpu(qd->qd_qb.qb_limit)))
1573 fdq->d_fieldmask ^= FS_DQ_BHARD;
1574 if (fdq->d_fieldmask == 0)
1575 goto out_i;
1576
1577 offset = qd2offset(qd);
Bob Peterson461cb412010-06-24 19:21:20 -04001578 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
Steven Whitehousee285c102009-09-23 13:50:49 +01001579 if (alloc_required) {
1580 al = gfs2_alloc_get(ip);
1581 if (al == NULL)
1582 goto out_i;
1583 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1584 &data_blocks, &ind_blocks);
1585 blocks = al->al_requested = 1 + data_blocks + ind_blocks;
1586 error = gfs2_inplace_reserve(ip);
1587 if (error)
1588 goto out_alloc;
Benjamin Marzinskibf97b672010-09-27 16:00:04 -05001589 blocks += gfs2_rg_blocks(al);
Steven Whitehousee285c102009-09-23 13:50:49 +01001590 }
1591
1592 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0);
1593 if (error)
1594 goto out_release;
1595
1596 /* Apply changes */
1597 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1598
1599 gfs2_trans_end(sdp);
1600out_release:
1601 if (alloc_required) {
1602 gfs2_inplace_release(ip);
1603out_alloc:
1604 gfs2_alloc_put(ip);
1605 }
1606out_i:
1607 gfs2_glock_dq_uninit(&i_gh);
1608out_q:
1609 gfs2_glock_dq_uninit(&q_gh);
1610out_put:
1611 mutex_unlock(&ip->i_inode.i_mutex);
1612 qd_put(qd);
1613 return error;
1614}
1615
Steven Whitehousecc632e72009-09-15 09:59:02 +01001616const struct quotactl_ops gfs2_quotactl_ops = {
1617 .quota_sync = gfs2_quota_sync,
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001618 .get_xstate = gfs2_quota_get_xstate,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001619 .get_dqblk = gfs2_get_dqblk,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001620 .set_dqblk = gfs2_set_dqblk,
Steven Whitehousecc632e72009-09-15 09:59:02 +01001621};
1622