blob: 3768c2f40e43350f3586769e9b40974ac9138a74 [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>
Ying Han1495f232011-05-24 17:12:27 -070041#include <linux/mm.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000042#include <linux/spinlock.h>
43#include <linux/completion.h>
44#include <linux/buffer_head.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000045#include <linux/sort.h>
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000046#include <linux/fs.h>
Steven Whitehouse2e565bb2006-10-02 11:38:25 -040047#include <linux/bio.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050048#include <linux/gfs2_ondisk.h>
Steven Whitehouse37b2c832008-11-17 14:25:37 +000049#include <linux/kthread.h>
50#include <linux/freezer.h>
Steven Whitehouse2ec46502009-09-28 12:49:15 +010051#include <linux/quota.h>
Steven Whitehouse1d371b52009-09-11 15:57:27 +010052#include <linux/dqblk_xfs.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000053
54#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050055#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000056#include "bmap.h"
57#include "glock.h"
58#include "glops.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000059#include "log.h"
60#include "meta_io.h"
61#include "quota.h"
62#include "rgrp.h"
63#include "super.h"
64#include "trans.h"
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000065#include "inode.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050066#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000067
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010068struct gfs2_quota_change_host {
69 u64 qc_change;
70 u32 qc_flags; /* GFS2_QCF_... */
Eric W. Biedermane08d8d72013-01-31 19:25:50 -080071 struct kqid qc_id;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010072};
73
Abhijith Das0a7ab792009-01-07 16:03:37 -060074static LIST_HEAD(qd_lru_list);
75static atomic_t qd_lru_count = ATOMIC_INIT(0);
Xu Gang1328df72009-04-14 14:54:14 +080076static DEFINE_SPINLOCK(qd_lru_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -060077
Ying Han1495f232011-05-24 17:12:27 -070078int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc)
Abhijith Das0a7ab792009-01-07 16:03:37 -060079{
80 struct gfs2_quota_data *qd;
81 struct gfs2_sbd *sdp;
Ying Han1495f232011-05-24 17:12:27 -070082 int nr_to_scan = sc->nr_to_scan;
Abhijith Das0a7ab792009-01-07 16:03:37 -060083
Ying Han1495f232011-05-24 17:12:27 -070084 if (nr_to_scan == 0)
Abhijith Das0a7ab792009-01-07 16:03:37 -060085 goto out;
86
Ying Han1495f232011-05-24 17:12:27 -070087 if (!(sc->gfp_mask & __GFP_FS))
Abhijith Das0a7ab792009-01-07 16:03:37 -060088 return -1;
89
90 spin_lock(&qd_lru_lock);
Ying Han1495f232011-05-24 17:12:27 -070091 while (nr_to_scan && !list_empty(&qd_lru_list)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -060092 qd = list_entry(qd_lru_list.next,
93 struct gfs2_quota_data, qd_reclaim);
94 sdp = qd->qd_gl->gl_sbd;
95
96 /* Free from the filesystem-specific list */
97 list_del(&qd->qd_list);
98
Abhijith Das0a7ab792009-01-07 16:03:37 -060099 gfs2_assert_warn(sdp, !qd->qd_change);
100 gfs2_assert_warn(sdp, !qd->qd_slot_count);
101 gfs2_assert_warn(sdp, !qd->qd_bh_count);
102
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000103 gfs2_glock_put(qd->qd_gl);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600104 atomic_dec(&sdp->sd_quota_count);
105
106 /* Delete it from the common reclaim list */
107 list_del_init(&qd->qd_reclaim);
108 atomic_dec(&qd_lru_count);
109 spin_unlock(&qd_lru_lock);
110 kmem_cache_free(gfs2_quotad_cachep, qd);
111 spin_lock(&qd_lru_lock);
Ying Han1495f232011-05-24 17:12:27 -0700112 nr_to_scan--;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600113 }
114 spin_unlock(&qd_lru_lock);
115
116out:
117 return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100;
118}
119
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800120static u64 qd2index(struct gfs2_quota_data *qd)
121{
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800122 struct kqid qid = qd->qd_id;
123 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
Bob Peterson37f71572013-05-10 11:59:18 -0400124 ((qid.type == USRQUOTA) ? 0 : 1);
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800125}
126
Steven Whitehousecd915492006-09-04 12:49:07 -0400127static u64 qd2offset(struct gfs2_quota_data *qd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000128{
Steven Whitehousecd915492006-09-04 12:49:07 -0400129 u64 offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000130
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800131 offset = qd2index(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000132 offset *= sizeof(struct gfs2_quota);
133
134 return offset;
135}
136
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800137static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000138 struct gfs2_quota_data **qdp)
139{
140 struct gfs2_quota_data *qd;
141 int error;
142
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000143 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000144 if (!qd)
145 return -ENOMEM;
146
Abhijith Das0a7ab792009-01-07 16:03:37 -0600147 atomic_set(&qd->qd_count, 1);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800148 qd->qd_id = qid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000149 qd->qd_slot = -1;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600150 INIT_LIST_HEAD(&qd->qd_reclaim);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000151
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800152 error = gfs2_glock_get(sdp, qd2index(qd),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000153 &gfs2_quota_glops, CREATE, &qd->qd_gl);
154 if (error)
155 goto fail;
156
David Teiglandb3b94fa2006-01-16 16:50:04 +0000157 *qdp = qd;
158
159 return 0;
160
Steven Whitehousea91ea692006-09-04 12:04:26 -0400161fail:
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000162 kmem_cache_free(gfs2_quotad_cachep, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000163 return error;
164}
165
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800166static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000167 struct gfs2_quota_data **qdp)
168{
169 struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
170 int error, found;
171
172 *qdp = NULL;
173
174 for (;;) {
175 found = 0;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600176 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000177 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800178 if (qid_eq(qd->qd_id, qid)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -0600179 if (!atomic_read(&qd->qd_count) &&
180 !list_empty(&qd->qd_reclaim)) {
181 /* Remove it from reclaim list */
182 list_del_init(&qd->qd_reclaim);
183 atomic_dec(&qd_lru_count);
184 }
185 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000186 found = 1;
187 break;
188 }
189 }
190
191 if (!found)
192 qd = NULL;
193
194 if (!qd && new_qd) {
195 qd = new_qd;
196 list_add(&qd->qd_list, &sdp->sd_quota_list);
197 atomic_inc(&sdp->sd_quota_count);
198 new_qd = NULL;
199 }
200
Abhijith Das0a7ab792009-01-07 16:03:37 -0600201 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000202
Steven Whitehouse6a6ada82009-09-15 16:30:38 +0100203 if (qd) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000204 if (new_qd) {
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000205 gfs2_glock_put(new_qd->qd_gl);
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000206 kmem_cache_free(gfs2_quotad_cachep, new_qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000207 }
208 *qdp = qd;
209 return 0;
210 }
211
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800212 error = qd_alloc(sdp, qid, &new_qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000213 if (error)
214 return error;
215 }
216}
217
218static void qd_hold(struct gfs2_quota_data *qd)
219{
220 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600221 gfs2_assert(sdp, atomic_read(&qd->qd_count));
222 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000223}
224
225static void qd_put(struct gfs2_quota_data *qd)
226{
Abhijith Das0a7ab792009-01-07 16:03:37 -0600227 if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) {
228 /* Add to the reclaim list */
229 list_add_tail(&qd->qd_reclaim, &qd_lru_list);
230 atomic_inc(&qd_lru_count);
231 spin_unlock(&qd_lru_lock);
232 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000233}
234
235static int slot_get(struct gfs2_quota_data *qd)
236{
237 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
238 unsigned int c, o = 0, b;
239 unsigned char byte = 0;
240
Steven Whitehouse22077f52009-01-08 14:28:42 +0000241 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000242
243 if (qd->qd_slot_count++) {
Steven Whitehouse22077f52009-01-08 14:28:42 +0000244 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000245 return 0;
246 }
247
248 for (c = 0; c < sdp->sd_quota_chunks; c++)
249 for (o = 0; o < PAGE_SIZE; o++) {
250 byte = sdp->sd_quota_bitmap[c][o];
251 if (byte != 0xFF)
252 goto found;
253 }
254
255 goto fail;
256
Steven Whitehousea91ea692006-09-04 12:04:26 -0400257found:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000258 for (b = 0; b < 8; b++)
259 if (!(byte & (1 << b)))
260 break;
261 qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b;
262
263 if (qd->qd_slot >= sdp->sd_quota_slots)
264 goto fail;
265
266 sdp->sd_quota_bitmap[c][o] |= 1 << b;
267
Steven Whitehouse22077f52009-01-08 14:28:42 +0000268 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000269
270 return 0;
271
Steven Whitehousea91ea692006-09-04 12:04:26 -0400272fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000273 qd->qd_slot_count--;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000274 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000275 return -ENOSPC;
276}
277
278static void slot_hold(struct gfs2_quota_data *qd)
279{
280 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
281
Steven Whitehouse22077f52009-01-08 14:28:42 +0000282 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000283 gfs2_assert(sdp, qd->qd_slot_count);
284 qd->qd_slot_count++;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000285 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000286}
287
288static void slot_put(struct gfs2_quota_data *qd)
289{
290 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
291
Steven Whitehouse22077f52009-01-08 14:28:42 +0000292 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000293 gfs2_assert(sdp, qd->qd_slot_count);
294 if (!--qd->qd_slot_count) {
295 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0);
296 qd->qd_slot = -1;
297 }
Steven Whitehouse22077f52009-01-08 14:28:42 +0000298 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000299}
300
301static int bh_get(struct gfs2_quota_data *qd)
302{
303 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400304 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000305 unsigned int block, offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000306 struct buffer_head *bh;
307 int error;
Steven Whitehouse23591252006-10-13 17:25:45 -0400308 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000309
Steven Whitehousef55ab262006-02-21 12:51:39 +0000310 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000311
312 if (qd->qd_bh_count++) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000313 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000314 return 0;
315 }
316
317 block = qd->qd_slot / sdp->sd_qc_per_block;
Bob Peterson0d0868b2007-12-11 18:51:25 -0600318 offset = qd->qd_slot % sdp->sd_qc_per_block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000319
Steven Whitehouse23591252006-10-13 17:25:45 -0400320 bh_map.b_size = 1 << ip->i_inode.i_blkbits;
Bob Petersone9e1ef22007-12-10 14:13:27 -0600321 error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000322 if (error)
323 goto fail;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400324 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000325 if (error)
326 goto fail;
327 error = -EIO;
328 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
329 goto fail_brelse;
330
331 qd->qd_bh = bh;
332 qd->qd_bh_qc = (struct gfs2_quota_change *)
333 (bh->b_data + sizeof(struct gfs2_meta_header) +
334 offset * sizeof(struct gfs2_quota_change));
335
Josef Whiter2e95b662007-02-20 00:03:29 -0500336 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000337
338 return 0;
339
Steven Whitehousea91ea692006-09-04 12:04:26 -0400340fail_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000341 brelse(bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400342fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000343 qd->qd_bh_count--;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000344 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000345 return error;
346}
347
348static void bh_put(struct gfs2_quota_data *qd)
349{
350 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
351
Steven Whitehousef55ab262006-02-21 12:51:39 +0000352 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000353 gfs2_assert(sdp, qd->qd_bh_count);
354 if (!--qd->qd_bh_count) {
355 brelse(qd->qd_bh);
356 qd->qd_bh = NULL;
357 qd->qd_bh_qc = NULL;
358 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000359 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000360}
361
362static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
363{
364 struct gfs2_quota_data *qd = NULL;
365 int error;
366 int found = 0;
367
368 *qdp = NULL;
369
370 if (sdp->sd_vfs->s_flags & MS_RDONLY)
371 return 0;
372
Abhijith Das0a7ab792009-01-07 16:03:37 -0600373 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000374
375 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
376 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
377 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
378 qd->qd_sync_gen >= sdp->sd_quota_sync_gen)
379 continue;
380
381 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
382
383 set_bit(QDF_LOCKED, &qd->qd_flags);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600384 gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
385 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000386 qd->qd_change_sync = qd->qd_change;
387 gfs2_assert_warn(sdp, qd->qd_slot_count);
388 qd->qd_slot_count++;
389 found = 1;
390
391 break;
392 }
393
394 if (!found)
395 qd = NULL;
396
Abhijith Das0a7ab792009-01-07 16:03:37 -0600397 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000398
399 if (qd) {
400 gfs2_assert_warn(sdp, qd->qd_change_sync);
401 error = bh_get(qd);
402 if (error) {
403 clear_bit(QDF_LOCKED, &qd->qd_flags);
404 slot_put(qd);
405 qd_put(qd);
406 return error;
407 }
408 }
409
410 *qdp = qd;
411
412 return 0;
413}
414
415static int qd_trylock(struct gfs2_quota_data *qd)
416{
417 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
418
419 if (sdp->sd_vfs->s_flags & MS_RDONLY)
420 return 0;
421
Abhijith Das0a7ab792009-01-07 16:03:37 -0600422 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000423
424 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
425 !test_bit(QDF_CHANGE, &qd->qd_flags)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -0600426 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000427 return 0;
428 }
429
430 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
431
432 set_bit(QDF_LOCKED, &qd->qd_flags);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600433 gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
434 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000435 qd->qd_change_sync = qd->qd_change;
436 gfs2_assert_warn(sdp, qd->qd_slot_count);
437 qd->qd_slot_count++;
438
Abhijith Das0a7ab792009-01-07 16:03:37 -0600439 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000440
441 gfs2_assert_warn(sdp, qd->qd_change_sync);
442 if (bh_get(qd)) {
443 clear_bit(QDF_LOCKED, &qd->qd_flags);
444 slot_put(qd);
445 qd_put(qd);
446 return 0;
447 }
448
449 return 1;
450}
451
452static void qd_unlock(struct gfs2_quota_data *qd)
453{
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500454 gfs2_assert_warn(qd->qd_gl->gl_sbd,
455 test_bit(QDF_LOCKED, &qd->qd_flags));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000456 clear_bit(QDF_LOCKED, &qd->qd_flags);
457 bh_put(qd);
458 slot_put(qd);
459 qd_put(qd);
460}
461
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800462static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000463 struct gfs2_quota_data **qdp)
464{
465 int error;
466
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800467 error = qd_get(sdp, qid, qdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000468 if (error)
469 return error;
470
471 error = slot_get(*qdp);
472 if (error)
473 goto fail;
474
475 error = bh_get(*qdp);
476 if (error)
477 goto fail_slot;
478
479 return 0;
480
Steven Whitehousea91ea692006-09-04 12:04:26 -0400481fail_slot:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000482 slot_put(*qdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400483fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000484 qd_put(*qdp);
485 return error;
486}
487
488static void qdsb_put(struct gfs2_quota_data *qd)
489{
490 bh_put(qd);
491 slot_put(qd);
492 qd_put(qd);
493}
494
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800495int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000496{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400497 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Bob Peterson5407e242012-05-18 09:28:23 -0400498 struct gfs2_quota_data **qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000499 int error;
500
Andrew Priceaaaf68c2012-10-12 16:45:08 +0100501 if (ip->i_res == NULL) {
502 error = gfs2_rs_alloc(ip);
503 if (error)
504 return error;
505 }
Bob Peterson5407e242012-05-18 09:28:23 -0400506
507 qd = ip->i_res->rs_qa_qd;
508
509 if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
David Teiglandb3b94fa2006-01-16 16:50:04 +0000510 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
511 return -EIO;
512
513 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
514 return 0;
515
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800516 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000517 if (error)
518 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400519 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000520 qd++;
521
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800522 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000523 if (error)
524 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400525 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000526 qd++;
527
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800528 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
529 !uid_eq(uid, ip->i_inode.i_uid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800530 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000531 if (error)
532 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400533 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000534 qd++;
535 }
536
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800537 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
538 !gid_eq(gid, ip->i_inode.i_gid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800539 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000540 if (error)
541 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400542 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000543 qd++;
544 }
545
Steven Whitehousea91ea692006-09-04 12:04:26 -0400546out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000547 if (error)
548 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000549 return error;
550}
551
552void gfs2_quota_unhold(struct gfs2_inode *ip)
553{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400554 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000555 unsigned int x;
556
Bob Peterson5407e242012-05-18 09:28:23 -0400557 if (ip->i_res == NULL)
558 return;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000559 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
560
Bob Peterson5407e242012-05-18 09:28:23 -0400561 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
562 qdsb_put(ip->i_res->rs_qa_qd[x]);
563 ip->i_res->rs_qa_qd[x] = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000564 }
Bob Peterson5407e242012-05-18 09:28:23 -0400565 ip->i_res->rs_qa_qd_num = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000566}
567
568static int sort_qd(const void *a, const void *b)
569{
Steven Whitehouse48fac172006-09-05 15:17:12 -0400570 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
571 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000572
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800573 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400574 return -1;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800575 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400576 return 1;
Steven Whitehouse48fac172006-09-05 15:17:12 -0400577 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000578}
579
Steven Whitehousecd915492006-09-04 12:49:07 -0400580static void do_qc(struct gfs2_quota_data *qd, s64 change)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000581{
582 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400583 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000584 struct gfs2_quota_change *qc = qd->qd_bh_qc;
Steven Whitehousecd915492006-09-04 12:49:07 -0400585 s64 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000586
Steven Whitehousef55ab262006-02-21 12:51:39 +0000587 mutex_lock(&sdp->sd_quota_mutex);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000588 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000589
590 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
591 qc->qc_change = 0;
592 qc->qc_flags = 0;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800593 if (qd->qd_id.type == USRQUOTA)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800595 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000596 }
597
Al Virob44b84d2006-10-14 10:46:30 -0400598 x = be64_to_cpu(qc->qc_change) + change;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000599 qc->qc_change = cpu_to_be64(x);
600
Steven Whitehouse22077f52009-01-08 14:28:42 +0000601 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000602 qd->qd_change = x;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000603 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000604
605 if (!x) {
606 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
607 clear_bit(QDF_CHANGE, &qd->qd_flags);
608 qc->qc_flags = 0;
609 qc->qc_id = 0;
610 slot_put(qd);
611 qd_put(qd);
612 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
613 qd_hold(qd);
614 slot_hold(qd);
615 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400616
Steven Whitehousef55ab262006-02-21 12:51:39 +0000617 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000618}
619
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000620/**
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100621 * gfs2_adjust_quota - adjust record of current block usage
622 * @ip: The quota inode
623 * @loc: Offset of the entry in the quota file
Steven Whitehousee285c102009-09-23 13:50:49 +0100624 * @change: The amount of usage change to record
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100625 * @qd: The quota data
Steven Whitehousee285c102009-09-23 13:50:49 +0100626 * @fdq: The updated limits to record
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000627 *
628 * This function was mostly borrowed from gfs2_block_truncate_page which was
629 * in turn mostly borrowed from ext3
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100630 *
631 * Returns: 0 or -ve on error
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000632 */
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100633
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000634static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
Steven Whitehousee285c102009-09-23 13:50:49 +0100635 s64 change, struct gfs2_quota_data *qd,
636 struct fs_disk_quota *fdq)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000637{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400638 struct inode *inode = &ip->i_inode;
Abhijith Das14870b42010-11-18 11:24:24 -0500639 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000640 struct address_space *mapping = inode->i_mapping;
641 unsigned long index = loc >> PAGE_CACHE_SHIFT;
Abhijith Das1990e912007-05-31 17:52:02 -0500642 unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000643 unsigned blocksize, iblock, pos;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100644 struct buffer_head *bh;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000645 struct page *page;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400646 void *kaddr, *ptr;
647 struct gfs2_quota q, *qp;
648 int err, nbytes;
Steven Whitehousee285c102009-09-23 13:50:49 +0100649 u64 size;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000650
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100651 if (gfs2_is_stuffed(ip)) {
652 err = gfs2_unstuff_dinode(ip, NULL);
653 if (err)
654 return err;
655 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400656
657 memset(&q, 0, sizeof(struct gfs2_quota));
Andrew Price43066292012-04-16 16:40:55 +0100658 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
Abhijith Das7e619bc2010-05-07 17:50:18 -0400659 if (err < 0)
660 return err;
661
662 err = -EIO;
663 qp = &q;
664 qp->qu_value = be64_to_cpu(qp->qu_value);
665 qp->qu_value += change;
666 qp->qu_value = cpu_to_be64(qp->qu_value);
667 qd->qd_qb.qb_value = qp->qu_value;
668 if (fdq) {
669 if (fdq->d_fieldmask & FS_DQ_BSOFT) {
Abhijith Das14870b42010-11-18 11:24:24 -0500670 qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400671 qd->qd_qb.qb_warn = qp->qu_warn;
672 }
673 if (fdq->d_fieldmask & FS_DQ_BHARD) {
Abhijith Das14870b42010-11-18 11:24:24 -0500674 qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400675 qd->qd_qb.qb_limit = qp->qu_limit;
676 }
Abhijith Das802ec9b2010-11-18 11:26:46 -0500677 if (fdq->d_fieldmask & FS_DQ_BCOUNT) {
678 qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift);
679 qd->qd_qb.qb_value = qp->qu_value;
680 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400681 }
682
683 /* Write the quota into the quota file on disk */
684 ptr = qp;
685 nbytes = sizeof(struct gfs2_quota);
686get_a_page:
Bob Peterson220cca22012-03-19 15:25:50 -0400687 page = find_or_create_page(mapping, index, GFP_NOFS);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000688 if (!page)
689 return -ENOMEM;
690
691 blocksize = inode->i_sb->s_blocksize;
692 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
693
694 if (!page_has_buffers(page))
695 create_empty_buffers(page, blocksize, 0);
696
697 bh = page_buffers(page);
698 pos = blocksize;
699 while (offset >= pos) {
700 bh = bh->b_this_page;
701 iblock++;
702 pos += blocksize;
703 }
704
705 if (!buffer_mapped(bh)) {
Bob Petersone9e1ef22007-12-10 14:13:27 -0600706 gfs2_block_map(inode, iblock, bh, 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000707 if (!buffer_mapped(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400708 goto unlock_out;
709 /* If it's a newly allocated disk block for quota, zero it */
Abhijith Das8b421602010-07-04 01:33:24 -0400710 if (buffer_new(bh))
711 zero_user(page, pos - blocksize, bh->b_size);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000712 }
713
714 if (PageUptodate(page))
715 set_buffer_uptodate(bh);
716
717 if (!buffer_uptodate(bh)) {
Steven Whitehouse20ed0532011-10-31 09:52:02 +0000718 ll_rw_block(READ | REQ_META, 1, &bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000719 wait_on_buffer(bh);
720 if (!buffer_uptodate(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400721 goto unlock_out;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000722 }
723
Bob Peterson37f71572013-05-10 11:59:18 -0400724 gfs2_trans_add_data(ip->i_gl, bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000725
Cong Wangd9349282011-11-25 23:14:30 +0800726 kaddr = kmap_atomic(page);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400727 if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
728 nbytes = PAGE_CACHE_SIZE - offset;
729 memcpy(kaddr + offset, ptr, nbytes);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000730 flush_dcache_page(page);
Cong Wangd9349282011-11-25 23:14:30 +0800731 kunmap_atomic(kaddr);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400732 unlock_page(page);
733 page_cache_release(page);
Steven Whitehousee285c102009-09-23 13:50:49 +0100734
Abhijith Das7e619bc2010-05-07 17:50:18 -0400735 /* If quota straddles page boundary, we need to update the rest of the
736 * quota at the beginning of the next page */
Abhijith Das8b421602010-07-04 01:33:24 -0400737 if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
Abhijith Das7e619bc2010-05-07 17:50:18 -0400738 ptr = ptr + nbytes;
739 nbytes = sizeof(struct gfs2_quota) - nbytes;
740 offset = 0;
741 index++;
742 goto get_a_page;
743 }
744
Steven Whitehousee285c102009-09-23 13:50:49 +0100745 size = loc + sizeof(struct gfs2_quota);
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100746 if (size > inode->i_size)
Steven Whitehousee285c102009-09-23 13:50:49 +0100747 i_size_write(inode, size);
Steven Whitehousee285c102009-09-23 13:50:49 +0100748 inode->i_mtime = inode->i_atime = CURRENT_TIME;
Steven Whitehousee285c102009-09-23 13:50:49 +0100749 mark_inode_dirty(inode);
Bob Peterson500242a2012-05-15 14:51:54 -0400750 return 0;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100751
Abhijith Das7e619bc2010-05-07 17:50:18 -0400752unlock_out:
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000753 unlock_page(page);
754 page_cache_release(page);
755 return err;
756}
757
David Teiglandb3b94fa2006-01-16 16:50:04 +0000758static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
759{
760 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400761 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000762 unsigned int data_blocks, ind_blocks;
763 struct gfs2_holder *ghs, i_gh;
764 unsigned int qx, x;
765 struct gfs2_quota_data *qd;
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100766 unsigned reserved;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000767 loff_t offset;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600768 unsigned int nalloc = 0, blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000769 int error;
770
Bob Peterson0a305e42012-06-06 11:17:59 +0100771 error = gfs2_rs_alloc(ip);
772 if (error)
773 return error;
774
David Teiglandb3b94fa2006-01-16 16:50:04 +0000775 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
776 &data_blocks, &ind_blocks);
777
Josef Bacik16c5f062008-04-09 09:33:41 -0400778 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000779 if (!ghs)
780 return -ENOMEM;
781
782 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
Jan Kara56aa72d2012-09-05 16:55:11 -0400783 mutex_lock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000784 for (qx = 0; qx < num_qd; qx++) {
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100785 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000786 GL_NOCACHE, &ghs[qx]);
787 if (error)
788 goto out;
789 }
790
791 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
792 if (error)
793 goto out;
794
795 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796 offset = qd2offset(qda[x]);
Bob Peterson461cb412010-06-24 19:21:20 -0400797 if (gfs2_write_alloc_required(ip, offset,
798 sizeof(struct gfs2_quota)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000799 nalloc++;
800 }
801
Abhijith Das20b95bf2008-03-06 17:43:52 -0600802 /*
803 * 1 blk for unstuffing inode if stuffed. We add this extra
804 * block to the reservation unconditionally. If the inode
805 * doesn't need unstuffing, the block will be released to the
806 * rgrp since it won't be allocated during the transaction
807 */
Abhijith Das7e619bc2010-05-07 17:50:18 -0400808 /* +3 in the end for unstuffing block, inode size update block
809 * and another block in case quota straddles page boundary and
810 * two blocks need to be updated instead of 1 */
811 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600812
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100813 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000814 error = gfs2_inplace_reserve(ip, reserved, 0);
Abhijith Das20b95bf2008-03-06 17:43:52 -0600815 if (error)
816 goto out_alloc;
817
818 if (nalloc)
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100819 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600820
821 error = gfs2_trans_begin(sdp, blocks, 0);
822 if (error)
823 goto out_ipres;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000824
825 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000826 qd = qda[x];
827 offset = qd2offset(qd);
Steven Whitehousee285c102009-09-23 13:50:49 +0100828 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000829 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000830 goto out_end_trans;
831
David Teiglandb3b94fa2006-01-16 16:50:04 +0000832 do_qc(qd, -qd->qd_change_sync);
Abhijith Das662e3a52011-03-08 10:40:42 -0500833 set_bit(QDF_REFRESH, &qd->qd_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000834 }
835
836 error = 0;
837
Steven Whitehousea91ea692006-09-04 12:04:26 -0400838out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000839 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400840out_ipres:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600841 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400842out_alloc:
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);
Andrew Price43066292012-04-16 16:40:55 +0100863 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
Steven Whitehousee285c102009-09-23 13:50:49 +0100864 if (error < 0)
865 return error;
866
David Teigland4e2f8842012-11-14 13:47:37 -0500867 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehousee285c102009-09-23 13:50:49 +0100868 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
David Teigland4e2f8842012-11-14 13:47:37 -0500891 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
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
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800923int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t 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);
Abhijith Das662e3a52011-03-08 10:40:42 -0500926 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927 unsigned int x;
928 int error = 0;
929
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100930 error = gfs2_quota_hold(ip, uid, gid);
931 if (error)
932 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000933
934 if (capable(CAP_SYS_RESOURCE) ||
935 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
936 return 0;
937
Bob Peterson5407e242012-05-18 09:28:23 -0400938 sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
939 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000940
Bob Peterson5407e242012-05-18 09:28:23 -0400941 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
Abhijith Das662e3a52011-03-08 10:40:42 -0500942 int force = NO_FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400943 qd = ip->i_res->rs_qa_qd[x];
Abhijith Das662e3a52011-03-08 10:40:42 -0500944 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
945 force = FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400946 error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000947 if (error)
948 break;
949 }
950
951 if (!error)
952 set_bit(GIF_QD_LOCKED, &ip->i_flags);
953 else {
954 while (x--)
Bob Peterson5407e242012-05-18 09:28:23 -0400955 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000956 gfs2_quota_unhold(ip);
957 }
958
959 return error;
960}
961
962static int need_sync(struct gfs2_quota_data *qd)
963{
964 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
965 struct gfs2_tune *gt = &sdp->sd_tune;
Steven Whitehousecd915492006-09-04 12:49:07 -0400966 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000967 unsigned int num, den;
968 int do_sync = 1;
969
970 if (!qd->qd_qb.qb_limit)
971 return 0;
972
Steven Whitehouse22077f52009-01-08 14:28:42 +0000973 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000974 value = qd->qd_change;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000975 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000976
977 spin_lock(&gt->gt_spin);
978 num = gt->gt_quota_scale_num;
979 den = gt->gt_quota_scale_den;
980 spin_unlock(&gt->gt_spin);
981
982 if (value < 0)
983 do_sync = 0;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400984 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
985 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000986 do_sync = 0;
987 else {
988 value *= gfs2_jindex_size(sdp) * num;
David Howells4abaca172008-07-11 14:39:56 +0100989 value = div_s64(value, den);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400990 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehousecd915492006-09-04 12:49:07 -0400991 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000992 do_sync = 0;
993 }
994
995 return do_sync;
996}
997
998void gfs2_quota_unlock(struct gfs2_inode *ip)
999{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001000 struct gfs2_quota_data *qda[4];
1001 unsigned int count = 0;
1002 unsigned int x;
1003
1004 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1005 goto out;
1006
Bob Peterson5407e242012-05-18 09:28:23 -04001007 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001008 struct gfs2_quota_data *qd;
1009 int sync;
1010
Bob Peterson5407e242012-05-18 09:28:23 -04001011 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001012 sync = need_sync(qd);
1013
Bob Peterson5407e242012-05-18 09:28:23 -04001014 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001015
1016 if (sync && qd_trylock(qd))
1017 qda[count++] = qd;
1018 }
1019
1020 if (count) {
1021 do_sync(count, qda);
1022 for (x = 0; x < count; x++)
1023 qd_unlock(qda[x]);
1024 }
1025
Steven Whitehousea91ea692006-09-04 12:04:26 -04001026out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001027 gfs2_quota_unhold(ip);
1028}
1029
1030#define MAX_LINE 256
1031
1032static int print_message(struct gfs2_quota_data *qd, char *type)
1033{
1034 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001035
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001036 printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n",
Steven Whitehouse02630a12006-07-03 11:20:06 -04001037 sdp->sd_fsname, type,
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001038 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1039 from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001040
1041 return 0;
1042}
1043
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001044int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001045{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001046 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001047 struct gfs2_quota_data *qd;
Steven Whitehousecd915492006-09-04 12:49:07 -04001048 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001049 unsigned int x;
1050 int error = 0;
1051
1052 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1053 return 0;
1054
1055 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1056 return 0;
1057
Bob Peterson5407e242012-05-18 09:28:23 -04001058 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1059 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001060
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001061 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1062 qid_eq(qd->qd_id, make_kqid_gid(gid))))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001063 continue;
1064
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001065 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehouse22077f52009-01-08 14:28:42 +00001066 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001067 value += qd->qd_change;
Steven Whitehouse22077f52009-01-08 14:28:42 +00001068 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001069
Steven Whitehousecd915492006-09-04 12:49:07 -04001070 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 +00001071 print_message(qd, "exceeded");
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001072 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001073 sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
1074
David Teiglandb3b94fa2006-01-16 16:50:04 +00001075 error = -EDQUOT;
1076 break;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001077 } else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
Steven Whitehousecd915492006-09-04 12:49:07 -04001078 (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
David Teiglandb3b94fa2006-01-16 16:50:04 +00001079 time_after_eq(jiffies, qd->qd_last_warn +
Steven Whitehouse568f4c92006-02-27 12:00:42 -05001080 gfs2_tune_get(sdp,
1081 gt_quota_warn_period) * HZ)) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001082 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001083 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001084 error = print_message(qd, "warning");
1085 qd->qd_last_warn = jiffies;
1086 }
1087 }
1088
1089 return error;
1090}
1091
Steven Whitehousecd915492006-09-04 12:49:07 -04001092void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001093 kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001094{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001095 struct gfs2_quota_data *qd;
1096 unsigned int x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001097
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001098 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001099 return;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001100 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001101 return;
1102
Bob Peterson5407e242012-05-18 09:28:23 -04001103 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1104 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001105
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001106 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1107 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001108 do_qc(qd, change);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001109 }
1110 }
1111}
1112
Jan Karaceed1722012-07-03 16:45:28 +02001113int gfs2_quota_sync(struct super_block *sb, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001114{
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001115 struct gfs2_sbd *sdp = sb->s_fs_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001116 struct gfs2_quota_data **qda;
1117 unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
1118 unsigned int num_qd;
1119 unsigned int x;
1120 int error = 0;
1121
1122 sdp->sd_quota_sync_gen++;
1123
1124 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1125 if (!qda)
1126 return -ENOMEM;
1127
1128 do {
1129 num_qd = 0;
1130
1131 for (;;) {
1132 error = qd_fish(sdp, qda + num_qd);
1133 if (error || !qda[num_qd])
1134 break;
1135 if (++num_qd == max_qd)
1136 break;
1137 }
1138
1139 if (num_qd) {
1140 if (!error)
1141 error = do_sync(num_qd, qda);
1142 if (!error)
1143 for (x = 0; x < num_qd; x++)
1144 qda[x]->qd_sync_gen =
1145 sdp->sd_quota_sync_gen;
1146
1147 for (x = 0; x < num_qd; x++)
1148 qd_unlock(qda[x]);
1149 }
1150 } while (!error && num_qd == max_qd);
1151
1152 kfree(qda);
1153
1154 return error;
1155}
1156
Eric W. Biedermaned87dab2013-01-31 19:42:40 -08001157int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001158{
1159 struct gfs2_quota_data *qd;
1160 struct gfs2_holder q_gh;
1161 int error;
1162
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001163 error = qd_get(sdp, qid, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001164 if (error)
1165 return error;
1166
1167 error = do_glock(qd, FORCE, &q_gh);
1168 if (!error)
1169 gfs2_glock_dq_uninit(&q_gh);
1170
1171 qd_put(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001172 return error;
1173}
1174
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001175static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf)
1176{
1177 const struct gfs2_quota_change *str = buf;
1178
1179 qc->qc_change = be64_to_cpu(str->qc_change);
1180 qc->qc_flags = be32_to_cpu(str->qc_flags);
Eric W. Biedermane08d8d72013-01-31 19:25:50 -08001181 qc->qc_id = make_kqid(&init_user_ns,
1182 (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA,
1183 be32_to_cpu(str->qc_id));
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001184}
1185
David Teiglandb3b94fa2006-01-16 16:50:04 +00001186int gfs2_quota_init(struct gfs2_sbd *sdp)
1187{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001188 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001189 u64 size = i_size_read(sdp->sd_qc_inode);
1190 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001191 unsigned int x, slot = 0;
1192 unsigned int found = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001193 u64 dblock;
1194 u32 extlen = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001195 int error;
1196
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001197 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001198 return -EIO;
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001199
David Teiglandb3b94fa2006-01-16 16:50:04 +00001200 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001201 sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001202
1203 error = -ENOMEM;
1204
1205 sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks,
Josef Bacik16c5f062008-04-09 09:33:41 -04001206 sizeof(unsigned char *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001207 if (!sdp->sd_quota_bitmap)
1208 return error;
1209
1210 for (x = 0; x < sdp->sd_quota_chunks; x++) {
Josef Bacik16c5f062008-04-09 09:33:41 -04001211 sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001212 if (!sdp->sd_quota_bitmap[x])
1213 goto fail;
1214 }
1215
1216 for (x = 0; x < blocks; x++) {
1217 struct buffer_head *bh;
1218 unsigned int y;
1219
1220 if (!extlen) {
1221 int new = 0;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001222 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001223 if (error)
1224 goto fail;
1225 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001226 error = -EIO;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001227 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1228 if (!bh)
1229 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001230 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1231 brelse(bh);
1232 goto fail;
1233 }
1234
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001235 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001236 y++, slot++) {
Al Virob62f9632006-10-13 23:46:46 -04001237 struct gfs2_quota_change_host qc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001238 struct gfs2_quota_data *qd;
1239
1240 gfs2_quota_change_in(&qc, bh->b_data +
1241 sizeof(struct gfs2_meta_header) +
1242 y * sizeof(struct gfs2_quota_change));
1243 if (!qc.qc_change)
1244 continue;
1245
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001246 error = qd_alloc(sdp, qc.qc_id, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001247 if (error) {
1248 brelse(bh);
1249 goto fail;
1250 }
1251
1252 set_bit(QDF_CHANGE, &qd->qd_flags);
1253 qd->qd_change = qc.qc_change;
1254 qd->qd_slot = slot;
1255 qd->qd_slot_count = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001256
Abhijith Das0a7ab792009-01-07 16:03:37 -06001257 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001258 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1);
1259 list_add(&qd->qd_list, &sdp->sd_quota_list);
1260 atomic_inc(&sdp->sd_quota_count);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001261 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001262
1263 found++;
1264 }
1265
1266 brelse(bh);
1267 dblock++;
1268 extlen--;
1269 }
1270
1271 if (found)
1272 fs_info(sdp, "found %u quota changes\n", found);
1273
1274 return 0;
1275
Steven Whitehousea91ea692006-09-04 12:04:26 -04001276fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001277 gfs2_quota_cleanup(sdp);
1278 return error;
1279}
1280
David Teiglandb3b94fa2006-01-16 16:50:04 +00001281void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1282{
1283 struct list_head *head = &sdp->sd_quota_list;
1284 struct gfs2_quota_data *qd;
1285 unsigned int x;
1286
Abhijith Das0a7ab792009-01-07 16:03:37 -06001287 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001288 while (!list_empty(head)) {
1289 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1290
Abhijith Das0a7ab792009-01-07 16:03:37 -06001291 if (atomic_read(&qd->qd_count) > 1 ||
1292 (atomic_read(&qd->qd_count) &&
1293 !test_bit(QDF_CHANGE, &qd->qd_flags))) {
Abhijith Das0a7ab792009-01-07 16:03:37 -06001294 list_move(&qd->qd_list, head);
1295 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001296 schedule();
Abhijith Das0a7ab792009-01-07 16:03:37 -06001297 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001298 continue;
1299 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001300
Abhijith Das0a7ab792009-01-07 16:03:37 -06001301 list_del(&qd->qd_list);
1302 /* Also remove if this qd exists in the reclaim list */
1303 if (!list_empty(&qd->qd_reclaim)) {
1304 list_del_init(&qd->qd_reclaim);
1305 atomic_dec(&qd_lru_count);
1306 }
1307 atomic_dec(&sdp->sd_quota_count);
1308 spin_unlock(&qd_lru_lock);
1309
1310 if (!atomic_read(&qd->qd_count)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001311 gfs2_assert_warn(sdp, !qd->qd_change);
1312 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1313 } else
1314 gfs2_assert_warn(sdp, qd->qd_slot_count == 1);
1315 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1316
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001317 gfs2_glock_put(qd->qd_gl);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001318 kmem_cache_free(gfs2_quotad_cachep, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001319
Abhijith Das0a7ab792009-01-07 16:03:37 -06001320 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001321 }
Abhijith Das0a7ab792009-01-07 16:03:37 -06001322 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001323
1324 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1325
1326 if (sdp->sd_quota_bitmap) {
1327 for (x = 0; x < sdp->sd_quota_chunks; x++)
1328 kfree(sdp->sd_quota_bitmap[x]);
1329 kfree(sdp->sd_quota_bitmap);
1330 }
1331}
1332
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001333static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1334{
1335 if (error == 0 || error == -EROFS)
1336 return;
1337 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1338 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1339}
1340
1341static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001342 int (*fxn)(struct super_block *sb, int type),
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001343 unsigned long t, unsigned long *timeo,
1344 unsigned int *new_timeo)
1345{
1346 if (t >= *timeo) {
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001347 int error = fxn(sdp->sd_vfs, 0);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001348 quotad_error(sdp, msg, error);
1349 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1350 } else {
1351 *timeo -= t;
1352 }
1353}
1354
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001355static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1356{
1357 struct gfs2_inode *ip;
1358
1359 while(1) {
1360 ip = NULL;
1361 spin_lock(&sdp->sd_trunc_lock);
1362 if (!list_empty(&sdp->sd_trunc_list)) {
1363 ip = list_entry(sdp->sd_trunc_list.next,
1364 struct gfs2_inode, i_trunc_list);
1365 list_del_init(&ip->i_trunc_list);
1366 }
1367 spin_unlock(&sdp->sd_trunc_lock);
1368 if (ip == NULL)
1369 return;
1370 gfs2_glock_finish_truncate(ip);
1371 }
1372}
1373
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001374void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1375 if (!sdp->sd_statfs_force_sync) {
1376 sdp->sd_statfs_force_sync = 1;
1377 wake_up(&sdp->sd_quota_wait);
1378 }
1379}
1380
1381
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001382/**
1383 * gfs2_quotad - Write cached quota changes into the quota file
1384 * @sdp: Pointer to GFS2 superblock
1385 *
1386 */
1387
1388int gfs2_quotad(void *data)
1389{
1390 struct gfs2_sbd *sdp = data;
1391 struct gfs2_tune *tune = &sdp->sd_tune;
1392 unsigned long statfs_timeo = 0;
1393 unsigned long quotad_timeo = 0;
1394 unsigned long t = 0;
1395 DEFINE_WAIT(wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001396 int empty;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001397
1398 while (!kthread_should_stop()) {
1399
1400 /* Update the master statfs file */
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001401 if (sdp->sd_statfs_force_sync) {
1402 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1403 quotad_error(sdp, "statfs", error);
1404 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1405 }
1406 else
1407 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1408 &statfs_timeo,
1409 &tune->gt_statfs_quantum);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001410
1411 /* Update quota file */
Steven Whitehouseedd2e9a2013-06-03 11:12:59 +01001412 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001413 &quotad_timeo, &tune->gt_quota_quantum);
1414
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001415 /* Check for & recover partially truncated inodes */
1416 quotad_check_trunc_list(sdp);
1417
Tejun Heoa0acae02011-11-21 12:32:22 -08001418 try_to_freeze();
1419
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001420 t = min(quotad_timeo, statfs_timeo);
1421
Steven Whitehouse7fa5d202009-03-31 15:49:08 +01001422 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001423 spin_lock(&sdp->sd_trunc_lock);
1424 empty = list_empty(&sdp->sd_trunc_list);
1425 spin_unlock(&sdp->sd_trunc_lock);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001426 if (empty && !sdp->sd_statfs_force_sync)
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001427 t -= schedule_timeout(t);
1428 else
1429 t = 0;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001430 finish_wait(&sdp->sd_quota_wait, &wait);
1431 }
1432
1433 return 0;
1434}
1435
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001436static int gfs2_quota_get_xstate(struct super_block *sb,
1437 struct fs_quota_stat *fqs)
1438{
1439 struct gfs2_sbd *sdp = sb->s_fs_info;
1440
1441 memset(fqs, 0, sizeof(struct fs_quota_stat));
1442 fqs->qs_version = FS_QSTAT_VERSION;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001443
1444 switch (sdp->sd_args.ar_quota) {
1445 case GFS2_QUOTA_ON:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001446 fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001447 /*FALLTHRU*/
1448 case GFS2_QUOTA_ACCOUNT:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001449 fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001450 break;
1451 case GFS2_QUOTA_OFF:
1452 break;
1453 }
1454
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001455 if (sdp->sd_quota_inode) {
1456 fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1457 fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
1458 }
1459 fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
1460 fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
1461 fqs->qs_incoredqs = atomic_read(&qd_lru_count);
1462 return 0;
1463}
1464
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001465static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001466 struct fs_disk_quota *fdq)
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001467{
1468 struct gfs2_sbd *sdp = sb->s_fs_info;
1469 struct gfs2_quota_lvb *qlvb;
1470 struct gfs2_quota_data *qd;
1471 struct gfs2_holder q_gh;
1472 int error;
1473
1474 memset(fdq, 0, sizeof(struct fs_disk_quota));
1475
1476 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1477 return -ESRCH; /* Crazy XFS error code */
1478
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001479 if ((qid.type != USRQUOTA) &&
1480 (qid.type != GRPQUOTA))
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001481 return -EINVAL;
1482
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001483 error = qd_get(sdp, qid, &qd);
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001484 if (error)
1485 return error;
1486 error = do_glock(qd, FORCE, &q_gh);
1487 if (error)
1488 goto out;
1489
David Teigland4e2f8842012-11-14 13:47:37 -05001490 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001491 fdq->d_version = FS_DQUOT_VERSION;
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001492 fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA;
Eric W. Biederman558e8522013-01-31 18:15:33 -08001493 fdq->d_id = from_kqid_munged(current_user_ns(), qid);
Abhijith Das14870b42010-11-18 11:24:24 -05001494 fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift;
1495 fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift;
1496 fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001497
1498 gfs2_glock_dq_uninit(&q_gh);
1499out:
1500 qd_put(qd);
1501 return error;
1502}
1503
Steven Whitehousee285c102009-09-23 13:50:49 +01001504/* GFS2 only supports a subset of the XFS fields */
Abhijith Das802ec9b2010-11-18 11:26:46 -05001505#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
Steven Whitehousee285c102009-09-23 13:50:49 +01001506
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001507static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001508 struct fs_disk_quota *fdq)
Steven Whitehousee285c102009-09-23 13:50:49 +01001509{
1510 struct gfs2_sbd *sdp = sb->s_fs_info;
1511 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1512 struct gfs2_quota_data *qd;
1513 struct gfs2_holder q_gh, i_gh;
1514 unsigned int data_blocks, ind_blocks;
1515 unsigned int blocks = 0;
1516 int alloc_required;
Steven Whitehousee285c102009-09-23 13:50:49 +01001517 loff_t offset;
1518 int error;
1519
1520 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1521 return -ESRCH; /* Crazy XFS error code */
1522
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001523 if ((qid.type != USRQUOTA) &&
1524 (qid.type != GRPQUOTA))
Steven Whitehousee285c102009-09-23 13:50:49 +01001525 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001526
1527 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1528 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001529
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001530 error = qd_get(sdp, qid, &qd);
Steven Whitehousee285c102009-09-23 13:50:49 +01001531 if (error)
1532 return error;
1533
Bob Peterson0a305e42012-06-06 11:17:59 +01001534 error = gfs2_rs_alloc(ip);
1535 if (error)
1536 goto out_put;
1537
Steven Whitehousee285c102009-09-23 13:50:49 +01001538 mutex_lock(&ip->i_inode.i_mutex);
1539 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1540 if (error)
Bob Peterson0a305e42012-06-06 11:17:59 +01001541 goto out_unlockput;
Steven Whitehousee285c102009-09-23 13:50:49 +01001542 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1543 if (error)
1544 goto out_q;
1545
1546 /* Check for existing entry, if none then alloc new blocks */
1547 error = update_qd(sdp, qd);
1548 if (error)
1549 goto out_i;
1550
1551 /* If nothing has changed, this is a no-op */
1552 if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
Abhijith Das14870b42010-11-18 11:24:24 -05001553 ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
Steven Whitehousee285c102009-09-23 13:50:49 +01001554 fdq->d_fieldmask ^= FS_DQ_BSOFT;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001555
Steven Whitehousee285c102009-09-23 13:50:49 +01001556 if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
Abhijith Das14870b42010-11-18 11:24:24 -05001557 ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
Steven Whitehousee285c102009-09-23 13:50:49 +01001558 fdq->d_fieldmask ^= FS_DQ_BHARD;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001559
1560 if ((fdq->d_fieldmask & FS_DQ_BCOUNT) &&
1561 ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1562 fdq->d_fieldmask ^= FS_DQ_BCOUNT;
1563
Steven Whitehousee285c102009-09-23 13:50:49 +01001564 if (fdq->d_fieldmask == 0)
1565 goto out_i;
1566
1567 offset = qd2offset(qd);
Bob Peterson461cb412010-06-24 19:21:20 -04001568 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
Abhijith Dase79a46a2011-02-07 11:22:41 -05001569 if (gfs2_is_stuffed(ip))
1570 alloc_required = 1;
Steven Whitehousee285c102009-09-23 13:50:49 +01001571 if (alloc_required) {
Steven Whitehousee285c102009-09-23 13:50:49 +01001572 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1573 &data_blocks, &ind_blocks);
Bob Peterson564e12b2011-11-21 13:36:17 -05001574 blocks = 1 + data_blocks + ind_blocks;
Steven Whitehouse9dbe9612012-10-31 10:37:10 +00001575 error = gfs2_inplace_reserve(ip, blocks, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001576 if (error)
Bob Peterson564e12b2011-11-21 13:36:17 -05001577 goto out_i;
Steven Whitehouse71f890f2012-07-30 14:53:19 +01001578 blocks += gfs2_rg_blocks(ip, blocks);
Steven Whitehousee285c102009-09-23 13:50:49 +01001579 }
1580
Abhijith Dase79a46a2011-02-07 11:22:41 -05001581 /* Some quotas span block boundaries and can update two blocks,
1582 adding an extra block to the transaction to handle such quotas */
1583 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001584 if (error)
1585 goto out_release;
1586
1587 /* Apply changes */
1588 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1589
1590 gfs2_trans_end(sdp);
1591out_release:
Bob Peterson564e12b2011-11-21 13:36:17 -05001592 if (alloc_required)
Steven Whitehousee285c102009-09-23 13:50:49 +01001593 gfs2_inplace_release(ip);
Steven Whitehousee285c102009-09-23 13:50:49 +01001594out_i:
1595 gfs2_glock_dq_uninit(&i_gh);
1596out_q:
1597 gfs2_glock_dq_uninit(&q_gh);
Bob Peterson0a305e42012-06-06 11:17:59 +01001598out_unlockput:
Steven Whitehousee285c102009-09-23 13:50:49 +01001599 mutex_unlock(&ip->i_inode.i_mutex);
Bob Peterson0a305e42012-06-06 11:17:59 +01001600out_put:
Steven Whitehousee285c102009-09-23 13:50:49 +01001601 qd_put(qd);
1602 return error;
1603}
1604
Steven Whitehousecc632e72009-09-15 09:59:02 +01001605const struct quotactl_ops gfs2_quotactl_ops = {
1606 .quota_sync = gfs2_quota_sync,
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001607 .get_xstate = gfs2_quota_get_xstate,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001608 .get_dqblk = gfs2_get_dqblk,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001609 .set_dqblk = gfs2_set_dqblk,
Steven Whitehousecc632e72009-09-15 09:59:02 +01001610};