blob: 55614685a31c47fb72c22d83073668a04ec766ad [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
Joe Perchesd77d1b52014-03-06 12:10:45 -080039#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
David Teiglandb3b94fa2006-01-16 16:50:04 +000041#include <linux/sched.h>
42#include <linux/slab.h>
Ying Han1495f232011-05-24 17:12:27 -070043#include <linux/mm.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000044#include <linux/spinlock.h>
45#include <linux/completion.h>
46#include <linux/buffer_head.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000047#include <linux/sort.h>
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000048#include <linux/fs.h>
Steven Whitehouse2e565bb2006-10-02 11:38:25 -040049#include <linux/bio.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050050#include <linux/gfs2_ondisk.h>
Steven Whitehouse37b2c832008-11-17 14:25:37 +000051#include <linux/kthread.h>
52#include <linux/freezer.h>
Steven Whitehouse2ec46502009-09-28 12:49:15 +010053#include <linux/quota.h>
Steven Whitehouse1d371b52009-09-11 15:57:27 +010054#include <linux/dqblk_xfs.h>
Steven Whitehouse9b9f0392013-11-01 14:52:06 -040055#include <linux/lockref.h>
Steven Whitehouse2147dbf2013-11-04 10:15:08 +000056#include <linux/list_lru.h>
Steven Whitehousec754fbb2013-12-12 10:47:59 +000057#include <linux/rcupdate.h>
58#include <linux/rculist_bl.h>
59#include <linux/bit_spinlock.h>
60#include <linux/jhash.h>
Steven Whitehouse1e3d3622014-01-15 12:57:25 +000061#include <linux/vmalloc.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000062
63#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050064#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000065#include "bmap.h"
66#include "glock.h"
67#include "glops.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000068#include "log.h"
69#include "meta_io.h"
70#include "quota.h"
71#include "rgrp.h"
72#include "super.h"
73#include "trans.h"
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000074#include "inode.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050075#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000076
Steven Whitehousec754fbb2013-12-12 10:47:59 +000077#define GFS2_QD_HASH_SHIFT 12
78#define GFS2_QD_HASH_SIZE (1 << GFS2_QD_HASH_SHIFT)
79#define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1)
80
81/* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */
Steven Whitehouse2d9e7232013-12-13 11:46:28 +000082/* -> sd_bitmap_lock */
Steven Whitehouse7d808232013-11-01 14:52:08 -040083static DEFINE_SPINLOCK(qd_lock);
Steven Whitehouse2147dbf2013-11-04 10:15:08 +000084struct list_lru gfs2_qd_lru;
Abhijith Das0a7ab792009-01-07 16:03:37 -060085
Steven Whitehousec754fbb2013-12-12 10:47:59 +000086static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE];
87
88static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp,
89 const struct kqid qid)
90{
91 unsigned int h;
92
93 h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0);
94 h = jhash(&qid, sizeof(struct kqid), h);
95
96 return h & GFS2_QD_HASH_MASK;
97}
98
99static inline void spin_lock_bucket(unsigned int hash)
100{
101 hlist_bl_lock(&qd_hash_table[hash]);
102}
103
104static inline void spin_unlock_bucket(unsigned int hash)
105{
106 hlist_bl_unlock(&qd_hash_table[hash]);
107}
108
109static void gfs2_qd_dealloc(struct rcu_head *rcu)
110{
111 struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu);
112 kmem_cache_free(gfs2_quotad_cachep, qd);
113}
114
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000115static void gfs2_qd_dispose(struct list_head *list)
Abhijith Das0a7ab792009-01-07 16:03:37 -0600116{
117 struct gfs2_quota_data *qd;
118 struct gfs2_sbd *sdp;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600119
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000120 while (!list_empty(list)) {
121 qd = list_entry(list->next, struct gfs2_quota_data, qd_lru);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600122 sdp = qd->qd_gl->gl_sbd;
123
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000124 list_del(&qd->qd_lru);
125
Abhijith Das0a7ab792009-01-07 16:03:37 -0600126 /* Free from the filesystem-specific list */
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000127 spin_lock(&qd_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600128 list_del(&qd->qd_list);
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000129 spin_unlock(&qd_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600130
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000131 spin_lock_bucket(qd->qd_hash);
132 hlist_bl_del_rcu(&qd->qd_hlist);
133 spin_unlock_bucket(qd->qd_hash);
134
Abhijith Das0a7ab792009-01-07 16:03:37 -0600135 gfs2_assert_warn(sdp, !qd->qd_change);
136 gfs2_assert_warn(sdp, !qd->qd_slot_count);
137 gfs2_assert_warn(sdp, !qd->qd_bh_count);
138
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000139 gfs2_glock_put(qd->qd_gl);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600140 atomic_dec(&sdp->sd_quota_count);
141
142 /* Delete it from the common reclaim list */
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000143 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600144 }
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000145}
146
147
Vladimir Davydov3f97b162015-02-12 14:59:35 -0800148static enum lru_status gfs2_qd_isolate(struct list_head *item,
149 struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000150{
151 struct list_head *dispose = arg;
152 struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru);
153
154 if (!spin_trylock(&qd->qd_lockref.lock))
155 return LRU_SKIP;
156
157 if (qd->qd_lockref.count == 0) {
158 lockref_mark_dead(&qd->qd_lockref);
Vladimir Davydov3f97b162015-02-12 14:59:35 -0800159 list_lru_isolate_move(lru, &qd->qd_lru, dispose);
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000160 }
161
162 spin_unlock(&qd->qd_lockref.lock);
163 return LRU_REMOVED;
164}
165
166static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
167 struct shrink_control *sc)
168{
169 LIST_HEAD(dispose);
170 unsigned long freed;
171
172 if (!(sc->gfp_mask & __GFP_FS))
173 return SHRINK_STOP;
174
Vladimir Davydov503c3582015-02-12 14:58:47 -0800175 freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
176 gfs2_qd_isolate, &dispose);
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000177
178 gfs2_qd_dispose(&dispose);
179
Dave Chinner1ab6c492013-08-28 10:18:09 +1000180 return freed;
181}
Abhijith Das0a7ab792009-01-07 16:03:37 -0600182
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000183static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
184 struct shrink_control *sc)
Dave Chinner1ab6c492013-08-28 10:18:09 +1000185{
Vladimir Davydov503c3582015-02-12 14:58:47 -0800186 return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
Abhijith Das0a7ab792009-01-07 16:03:37 -0600187}
188
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000189struct shrinker gfs2_qd_shrinker = {
190 .count_objects = gfs2_qd_shrink_count,
191 .scan_objects = gfs2_qd_shrink_scan,
192 .seeks = DEFAULT_SEEKS,
193 .flags = SHRINKER_NUMA_AWARE,
194};
195
196
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800197static u64 qd2index(struct gfs2_quota_data *qd)
198{
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800199 struct kqid qid = qd->qd_id;
200 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
Bob Peterson37f71572013-05-10 11:59:18 -0400201 ((qid.type == USRQUOTA) ? 0 : 1);
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800202}
203
Steven Whitehousecd915492006-09-04 12:49:07 -0400204static u64 qd2offset(struct gfs2_quota_data *qd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000205{
Steven Whitehousecd915492006-09-04 12:49:07 -0400206 u64 offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000207
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800208 offset = qd2index(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000209 offset *= sizeof(struct gfs2_quota);
210
211 return offset;
212}
213
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000214static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000215{
216 struct gfs2_quota_data *qd;
217 int error;
218
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000219 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000220 if (!qd)
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000221 return NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000222
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000223 qd->qd_sbd = sdp;
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400224 qd->qd_lockref.count = 1;
225 spin_lock_init(&qd->qd_lockref.lock);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800226 qd->qd_id = qid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000227 qd->qd_slot = -1;
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000228 INIT_LIST_HEAD(&qd->qd_lru);
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000229 qd->qd_hash = hash;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000230
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800231 error = gfs2_glock_get(sdp, qd2index(qd),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000232 &gfs2_quota_glops, CREATE, &qd->qd_gl);
233 if (error)
234 goto fail;
235
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000236 return qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000237
Steven Whitehousea91ea692006-09-04 12:04:26 -0400238fail:
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000239 kmem_cache_free(gfs2_quotad_cachep, qd);
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000240 return NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000241}
242
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000243static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
244 const struct gfs2_sbd *sdp,
245 struct kqid qid)
246{
247 struct gfs2_quota_data *qd;
248 struct hlist_bl_node *h;
249
250 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
251 if (!qid_eq(qd->qd_id, qid))
252 continue;
253 if (qd->qd_sbd != sdp)
254 continue;
255 if (lockref_get_not_dead(&qd->qd_lockref)) {
256 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
257 return qd;
258 }
259 }
260
261 return NULL;
262}
263
264
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800265static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000266 struct gfs2_quota_data **qdp)
267{
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000268 struct gfs2_quota_data *qd, *new_qd;
269 unsigned int hash = gfs2_qd_hash(sdp, qid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000270
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000271 rcu_read_lock();
272 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
273 rcu_read_unlock();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000274
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000275 if (qd)
276 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000277
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000278 new_qd = qd_alloc(hash, sdp, qid);
279 if (!new_qd)
280 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000281
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000282 spin_lock(&qd_lock);
283 spin_lock_bucket(hash);
284 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
285 if (qd == NULL) {
286 *qdp = new_qd;
287 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
288 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
289 atomic_inc(&sdp->sd_quota_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000290 }
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000291 spin_unlock_bucket(hash);
292 spin_unlock(&qd_lock);
293
294 if (qd) {
295 gfs2_glock_put(new_qd->qd_gl);
296 kmem_cache_free(gfs2_quotad_cachep, new_qd);
297 }
298
299 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000300}
301
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000302
David Teiglandb3b94fa2006-01-16 16:50:04 +0000303static void qd_hold(struct gfs2_quota_data *qd)
304{
305 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400306 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
307 lockref_get(&qd->qd_lockref);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000308}
309
310static void qd_put(struct gfs2_quota_data *qd)
311{
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000312 if (lockref_put_or_lock(&qd->qd_lockref))
313 return;
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400314
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000315 qd->qd_lockref.count = 0;
316 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
317 spin_unlock(&qd->qd_lockref.lock);
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400318
David Teiglandb3b94fa2006-01-16 16:50:04 +0000319}
320
321static int slot_get(struct gfs2_quota_data *qd)
322{
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000323 struct gfs2_sbd *sdp = qd->qd_sbd;
324 unsigned int bit;
325 int error = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000326
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000327 spin_lock(&sdp->sd_bitmap_lock);
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000328 if (qd->qd_slot_count != 0)
329 goto out;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000330
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000331 error = -ENOSPC;
332 bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
333 if (bit < sdp->sd_quota_slots) {
334 set_bit(bit, sdp->sd_quota_bitmap);
335 qd->qd_slot = bit;
Abhi Dase9fb7c72014-03-31 01:19:29 -0500336 error = 0;
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000337out:
338 qd->qd_slot_count++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000339 }
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000340 spin_unlock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000341
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000342 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000343}
344
345static void slot_hold(struct gfs2_quota_data *qd)
346{
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000347 struct gfs2_sbd *sdp = qd->qd_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000348
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000349 spin_lock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000350 gfs2_assert(sdp, qd->qd_slot_count);
351 qd->qd_slot_count++;
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000352 spin_unlock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000353}
354
355static void slot_put(struct gfs2_quota_data *qd)
356{
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000357 struct gfs2_sbd *sdp = qd->qd_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000358
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000359 spin_lock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000360 gfs2_assert(sdp, qd->qd_slot_count);
361 if (!--qd->qd_slot_count) {
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000362 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000363 qd->qd_slot = -1;
364 }
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000365 spin_unlock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000366}
367
368static int bh_get(struct gfs2_quota_data *qd)
369{
370 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400371 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000372 unsigned int block, offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000373 struct buffer_head *bh;
374 int error;
Steven Whitehouse23591252006-10-13 17:25:45 -0400375 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000376
Steven Whitehousef55ab262006-02-21 12:51:39 +0000377 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000378
379 if (qd->qd_bh_count++) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000380 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000381 return 0;
382 }
383
384 block = qd->qd_slot / sdp->sd_qc_per_block;
Bob Peterson0d0868b2007-12-11 18:51:25 -0600385 offset = qd->qd_slot % sdp->sd_qc_per_block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000386
Steven Whitehouse23591252006-10-13 17:25:45 -0400387 bh_map.b_size = 1 << ip->i_inode.i_blkbits;
Bob Petersone9e1ef22007-12-10 14:13:27 -0600388 error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000389 if (error)
390 goto fail;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400391 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000392 if (error)
393 goto fail;
394 error = -EIO;
395 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
396 goto fail_brelse;
397
398 qd->qd_bh = bh;
399 qd->qd_bh_qc = (struct gfs2_quota_change *)
400 (bh->b_data + sizeof(struct gfs2_meta_header) +
401 offset * sizeof(struct gfs2_quota_change));
402
Josef Whiter2e95b662007-02-20 00:03:29 -0500403 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000404
405 return 0;
406
Steven Whitehousea91ea692006-09-04 12:04:26 -0400407fail_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000408 brelse(bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400409fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000410 qd->qd_bh_count--;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000411 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000412 return error;
413}
414
415static void bh_put(struct gfs2_quota_data *qd)
416{
417 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
418
Steven Whitehousef55ab262006-02-21 12:51:39 +0000419 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000420 gfs2_assert(sdp, qd->qd_bh_count);
421 if (!--qd->qd_bh_count) {
422 brelse(qd->qd_bh);
423 qd->qd_bh = NULL;
424 qd->qd_bh_qc = NULL;
425 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000426 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000427}
428
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100429static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
430 u64 *sync_gen)
431{
432 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
433 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
434 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
435 return 0;
436
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000437 if (!lockref_get_not_dead(&qd->qd_lockref))
438 return 0;
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100439
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000440 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100441 set_bit(QDF_LOCKED, &qd->qd_flags);
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100442 qd->qd_change_sync = qd->qd_change;
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000443 slot_hold(qd);
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100444 return 1;
445}
446
David Teiglandb3b94fa2006-01-16 16:50:04 +0000447static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
448{
449 struct gfs2_quota_data *qd = NULL;
450 int error;
451 int found = 0;
452
453 *qdp = NULL;
454
455 if (sdp->sd_vfs->s_flags & MS_RDONLY)
456 return 0;
457
Steven Whitehouse7d808232013-11-01 14:52:08 -0400458 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000459
460 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100461 found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen);
462 if (found)
463 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000464 }
465
466 if (!found)
467 qd = NULL;
468
Steven Whitehouse7d808232013-11-01 14:52:08 -0400469 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000470
471 if (qd) {
472 gfs2_assert_warn(sdp, qd->qd_change_sync);
473 error = bh_get(qd);
474 if (error) {
475 clear_bit(QDF_LOCKED, &qd->qd_flags);
476 slot_put(qd);
477 qd_put(qd);
478 return error;
479 }
480 }
481
482 *qdp = qd;
483
484 return 0;
485}
486
David Teiglandb3b94fa2006-01-16 16:50:04 +0000487static void qd_unlock(struct gfs2_quota_data *qd)
488{
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500489 gfs2_assert_warn(qd->qd_gl->gl_sbd,
490 test_bit(QDF_LOCKED, &qd->qd_flags));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000491 clear_bit(QDF_LOCKED, &qd->qd_flags);
492 bh_put(qd);
493 slot_put(qd);
494 qd_put(qd);
495}
496
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800497static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000498 struct gfs2_quota_data **qdp)
499{
500 int error;
501
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800502 error = qd_get(sdp, qid, qdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000503 if (error)
504 return error;
505
506 error = slot_get(*qdp);
507 if (error)
508 goto fail;
509
510 error = bh_get(*qdp);
511 if (error)
512 goto fail_slot;
513
514 return 0;
515
Steven Whitehousea91ea692006-09-04 12:04:26 -0400516fail_slot:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000517 slot_put(*qdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400518fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000519 qd_put(*qdp);
520 return error;
521}
522
523static void qdsb_put(struct gfs2_quota_data *qd)
524{
525 bh_put(qd);
526 slot_put(qd);
527 qd_put(qd);
528}
529
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800530int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000531{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400532 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Bob Peterson5407e242012-05-18 09:28:23 -0400533 struct gfs2_quota_data **qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000534 int error;
535
Andrew Priceaaaf68c2012-10-12 16:45:08 +0100536 if (ip->i_res == NULL) {
537 error = gfs2_rs_alloc(ip);
538 if (error)
539 return error;
540 }
Bob Peterson5407e242012-05-18 09:28:23 -0400541
542 qd = ip->i_res->rs_qa_qd;
543
544 if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
David Teiglandb3b94fa2006-01-16 16:50:04 +0000545 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
546 return -EIO;
547
548 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
549 return 0;
550
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800551 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000552 if (error)
553 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400554 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000555 qd++;
556
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800557 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000558 if (error)
559 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400560 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000561 qd++;
562
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800563 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
564 !uid_eq(uid, ip->i_inode.i_uid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800565 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000566 if (error)
567 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400568 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000569 qd++;
570 }
571
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800572 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
573 !gid_eq(gid, ip->i_inode.i_gid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800574 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000575 if (error)
576 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400577 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000578 qd++;
579 }
580
Steven Whitehousea91ea692006-09-04 12:04:26 -0400581out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000582 if (error)
583 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000584 return error;
585}
586
587void gfs2_quota_unhold(struct gfs2_inode *ip)
588{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400589 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000590 unsigned int x;
591
Bob Peterson5407e242012-05-18 09:28:23 -0400592 if (ip->i_res == NULL)
593 return;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
595
Bob Peterson5407e242012-05-18 09:28:23 -0400596 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
597 qdsb_put(ip->i_res->rs_qa_qd[x]);
598 ip->i_res->rs_qa_qd[x] = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000599 }
Bob Peterson5407e242012-05-18 09:28:23 -0400600 ip->i_res->rs_qa_qd_num = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000601}
602
603static int sort_qd(const void *a, const void *b)
604{
Steven Whitehouse48fac172006-09-05 15:17:12 -0400605 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
606 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000607
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800608 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400609 return -1;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800610 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400611 return 1;
Steven Whitehouse48fac172006-09-05 15:17:12 -0400612 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000613}
614
Steven Whitehousecd915492006-09-04 12:49:07 -0400615static void do_qc(struct gfs2_quota_data *qd, s64 change)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000616{
617 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400618 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000619 struct gfs2_quota_change *qc = qd->qd_bh_qc;
Steven Whitehousecd915492006-09-04 12:49:07 -0400620 s64 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000621
Steven Whitehousef55ab262006-02-21 12:51:39 +0000622 mutex_lock(&sdp->sd_quota_mutex);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000623 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000624
625 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
626 qc->qc_change = 0;
627 qc->qc_flags = 0;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800628 if (qd->qd_id.type == USRQUOTA)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000629 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800630 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000631 }
632
Al Virob44b84d2006-10-14 10:46:30 -0400633 x = be64_to_cpu(qc->qc_change) + change;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000634 qc->qc_change = cpu_to_be64(x);
635
Steven Whitehouse7d808232013-11-01 14:52:08 -0400636 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000637 qd->qd_change = x;
Steven Whitehouse7d808232013-11-01 14:52:08 -0400638 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000639
640 if (!x) {
641 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
642 clear_bit(QDF_CHANGE, &qd->qd_flags);
643 qc->qc_flags = 0;
644 qc->qc_id = 0;
645 slot_put(qd);
646 qd_put(qd);
647 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
648 qd_hold(qd);
649 slot_hold(qd);
650 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400651
Steven Whitehousef55ab262006-02-21 12:51:39 +0000652 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000653}
654
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000655/**
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100656 * gfs2_adjust_quota - adjust record of current block usage
657 * @ip: The quota inode
658 * @loc: Offset of the entry in the quota file
Steven Whitehousee285c102009-09-23 13:50:49 +0100659 * @change: The amount of usage change to record
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100660 * @qd: The quota data
Steven Whitehousee285c102009-09-23 13:50:49 +0100661 * @fdq: The updated limits to record
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000662 *
663 * This function was mostly borrowed from gfs2_block_truncate_page which was
664 * in turn mostly borrowed from ext3
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100665 *
666 * Returns: 0 or -ve on error
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000667 */
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100668
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000669static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
Steven Whitehousee285c102009-09-23 13:50:49 +0100670 s64 change, struct gfs2_quota_data *qd,
Jan Kara14bf61f2014-10-09 16:03:13 +0200671 struct qc_dqblk *fdq)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000672{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400673 struct inode *inode = &ip->i_inode;
Abhijith Das14870b42010-11-18 11:24:24 -0500674 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000675 struct address_space *mapping = inode->i_mapping;
676 unsigned long index = loc >> PAGE_CACHE_SHIFT;
Abhijith Das1990e912007-05-31 17:52:02 -0500677 unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000678 unsigned blocksize, iblock, pos;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100679 struct buffer_head *bh;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000680 struct page *page;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400681 void *kaddr, *ptr;
Al Viro951b4bd2013-06-02 19:53:40 -0400682 struct gfs2_quota q;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400683 int err, nbytes;
Steven Whitehousee285c102009-09-23 13:50:49 +0100684 u64 size;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000685
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100686 if (gfs2_is_stuffed(ip)) {
687 err = gfs2_unstuff_dinode(ip, NULL);
688 if (err)
689 return err;
690 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400691
692 memset(&q, 0, sizeof(struct gfs2_quota));
Andrew Price43066292012-04-16 16:40:55 +0100693 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
Abhijith Das7e619bc2010-05-07 17:50:18 -0400694 if (err < 0)
695 return err;
696
697 err = -EIO;
Al Viro951b4bd2013-06-02 19:53:40 -0400698 be64_add_cpu(&q.qu_value, change);
699 qd->qd_qb.qb_value = q.qu_value;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400700 if (fdq) {
Jan Kara14bf61f2014-10-09 16:03:13 +0200701 if (fdq->d_fieldmask & QC_SPC_SOFT) {
702 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
Al Viro951b4bd2013-06-02 19:53:40 -0400703 qd->qd_qb.qb_warn = q.qu_warn;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400704 }
Jan Kara14bf61f2014-10-09 16:03:13 +0200705 if (fdq->d_fieldmask & QC_SPC_HARD) {
706 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
Al Viro951b4bd2013-06-02 19:53:40 -0400707 qd->qd_qb.qb_limit = q.qu_limit;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400708 }
Jan Kara14bf61f2014-10-09 16:03:13 +0200709 if (fdq->d_fieldmask & QC_SPACE) {
710 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
Al Viro951b4bd2013-06-02 19:53:40 -0400711 qd->qd_qb.qb_value = q.qu_value;
Abhijith Das802ec9b2010-11-18 11:26:46 -0500712 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400713 }
714
715 /* Write the quota into the quota file on disk */
Al Viro951b4bd2013-06-02 19:53:40 -0400716 ptr = &q;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400717 nbytes = sizeof(struct gfs2_quota);
718get_a_page:
Bob Peterson220cca22012-03-19 15:25:50 -0400719 page = find_or_create_page(mapping, index, GFP_NOFS);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000720 if (!page)
721 return -ENOMEM;
722
723 blocksize = inode->i_sb->s_blocksize;
724 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
725
726 if (!page_has_buffers(page))
727 create_empty_buffers(page, blocksize, 0);
728
729 bh = page_buffers(page);
730 pos = blocksize;
731 while (offset >= pos) {
732 bh = bh->b_this_page;
733 iblock++;
734 pos += blocksize;
735 }
736
737 if (!buffer_mapped(bh)) {
Bob Petersone9e1ef22007-12-10 14:13:27 -0600738 gfs2_block_map(inode, iblock, bh, 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000739 if (!buffer_mapped(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400740 goto unlock_out;
741 /* If it's a newly allocated disk block for quota, zero it */
Abhijith Das8b421602010-07-04 01:33:24 -0400742 if (buffer_new(bh))
743 zero_user(page, pos - blocksize, bh->b_size);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000744 }
745
746 if (PageUptodate(page))
747 set_buffer_uptodate(bh);
748
749 if (!buffer_uptodate(bh)) {
Steven Whitehouse20ed0532011-10-31 09:52:02 +0000750 ll_rw_block(READ | REQ_META, 1, &bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000751 wait_on_buffer(bh);
752 if (!buffer_uptodate(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400753 goto unlock_out;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000754 }
755
Bob Peterson37f71572013-05-10 11:59:18 -0400756 gfs2_trans_add_data(ip->i_gl, bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000757
Cong Wangd9349282011-11-25 23:14:30 +0800758 kaddr = kmap_atomic(page);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400759 if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
760 nbytes = PAGE_CACHE_SIZE - offset;
761 memcpy(kaddr + offset, ptr, nbytes);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000762 flush_dcache_page(page);
Cong Wangd9349282011-11-25 23:14:30 +0800763 kunmap_atomic(kaddr);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400764 unlock_page(page);
765 page_cache_release(page);
Steven Whitehousee285c102009-09-23 13:50:49 +0100766
Abhijith Das7e619bc2010-05-07 17:50:18 -0400767 /* If quota straddles page boundary, we need to update the rest of the
768 * quota at the beginning of the next page */
Abhijith Das8b421602010-07-04 01:33:24 -0400769 if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
Abhijith Das7e619bc2010-05-07 17:50:18 -0400770 ptr = ptr + nbytes;
771 nbytes = sizeof(struct gfs2_quota) - nbytes;
772 offset = 0;
773 index++;
774 goto get_a_page;
775 }
776
Steven Whitehousee285c102009-09-23 13:50:49 +0100777 size = loc + sizeof(struct gfs2_quota);
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100778 if (size > inode->i_size)
Steven Whitehousee285c102009-09-23 13:50:49 +0100779 i_size_write(inode, size);
Steven Whitehousee285c102009-09-23 13:50:49 +0100780 inode->i_mtime = inode->i_atime = CURRENT_TIME;
Steven Whitehousee285c102009-09-23 13:50:49 +0100781 mark_inode_dirty(inode);
Abhi Das991deec2014-04-17 00:55:04 -0500782 set_bit(QDF_REFRESH, &qd->qd_flags);
Bob Peterson500242a2012-05-15 14:51:54 -0400783 return 0;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100784
Abhijith Das7e619bc2010-05-07 17:50:18 -0400785unlock_out:
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000786 unlock_page(page);
787 page_cache_release(page);
788 return err;
789}
790
David Teiglandb3b94fa2006-01-16 16:50:04 +0000791static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
792{
793 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400794 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100795 struct gfs2_alloc_parms ap = { .aflags = 0, };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796 unsigned int data_blocks, ind_blocks;
797 struct gfs2_holder *ghs, i_gh;
798 unsigned int qx, x;
799 struct gfs2_quota_data *qd;
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100800 unsigned reserved;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000801 loff_t offset;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600802 unsigned int nalloc = 0, blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000803 int error;
804
Bob Peterson0a305e42012-06-06 11:17:59 +0100805 error = gfs2_rs_alloc(ip);
806 if (error)
807 return error;
808
David Teiglandb3b94fa2006-01-16 16:50:04 +0000809 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
810 &data_blocks, &ind_blocks);
811
Josef Bacik16c5f062008-04-09 09:33:41 -0400812 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000813 if (!ghs)
814 return -ENOMEM;
815
816 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
Jan Kara56aa72d2012-09-05 16:55:11 -0400817 mutex_lock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000818 for (qx = 0; qx < num_qd; qx++) {
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100819 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000820 GL_NOCACHE, &ghs[qx]);
821 if (error)
822 goto out;
823 }
824
825 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
826 if (error)
827 goto out;
828
829 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000830 offset = qd2offset(qda[x]);
Bob Peterson461cb412010-06-24 19:21:20 -0400831 if (gfs2_write_alloc_required(ip, offset,
832 sizeof(struct gfs2_quota)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000833 nalloc++;
834 }
835
Abhijith Das20b95bf2008-03-06 17:43:52 -0600836 /*
837 * 1 blk for unstuffing inode if stuffed. We add this extra
838 * block to the reservation unconditionally. If the inode
839 * doesn't need unstuffing, the block will be released to the
840 * rgrp since it won't be allocated during the transaction
841 */
Abhijith Das7e619bc2010-05-07 17:50:18 -0400842 /* +3 in the end for unstuffing block, inode size update block
843 * and another block in case quota straddles page boundary and
844 * two blocks need to be updated instead of 1 */
845 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600846
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100847 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100848 ap.target = reserved;
849 error = gfs2_inplace_reserve(ip, &ap);
Abhijith Das20b95bf2008-03-06 17:43:52 -0600850 if (error)
851 goto out_alloc;
852
853 if (nalloc)
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100854 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600855
856 error = gfs2_trans_begin(sdp, blocks, 0);
857 if (error)
858 goto out_ipres;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000859
860 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000861 qd = qda[x];
862 offset = qd2offset(qd);
Steven Whitehousee285c102009-09-23 13:50:49 +0100863 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000864 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000865 goto out_end_trans;
866
David Teiglandb3b94fa2006-01-16 16:50:04 +0000867 do_qc(qd, -qd->qd_change_sync);
Abhijith Das662e3a52011-03-08 10:40:42 -0500868 set_bit(QDF_REFRESH, &qd->qd_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000869 }
870
871 error = 0;
872
Steven Whitehousea91ea692006-09-04 12:04:26 -0400873out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000874 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400875out_ipres:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600876 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400877out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000878 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400879out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000880 while (qx--)
881 gfs2_glock_dq_uninit(&ghs[qx]);
Steven Whitehousee285c102009-09-23 13:50:49 +0100882 mutex_unlock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000883 kfree(ghs);
Benjamin Marzinski24972552014-05-01 22:26:55 -0500884 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl, NORMAL_FLUSH);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000885 return error;
886}
887
Steven Whitehousee285c102009-09-23 13:50:49 +0100888static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
889{
890 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
891 struct gfs2_quota q;
892 struct gfs2_quota_lvb *qlvb;
893 loff_t pos;
894 int error;
895
896 memset(&q, 0, sizeof(struct gfs2_quota));
897 pos = qd2offset(qd);
Andrew Price43066292012-04-16 16:40:55 +0100898 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
Steven Whitehousee285c102009-09-23 13:50:49 +0100899 if (error < 0)
900 return error;
901
David Teigland4e2f8842012-11-14 13:47:37 -0500902 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehousee285c102009-09-23 13:50:49 +0100903 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
904 qlvb->__pad = 0;
905 qlvb->qb_limit = q.qu_limit;
906 qlvb->qb_warn = q.qu_warn;
907 qlvb->qb_value = q.qu_value;
908 qd->qd_qb = *qlvb;
909
910 return 0;
911}
912
David Teiglandb3b94fa2006-01-16 16:50:04 +0000913static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
914 struct gfs2_holder *q_gh)
915{
916 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400917 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000918 struct gfs2_holder i_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000919 int error;
920
Steven Whitehousea91ea692006-09-04 12:04:26 -0400921restart:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000922 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
923 if (error)
924 return error;
925
David Teigland4e2f8842012-11-14 13:47:37 -0500926 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400928 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000929 gfs2_glock_dq_uninit(q_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100930 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
931 GL_NOCACHE, q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000932 if (error)
933 return error;
934
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400935 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000936 if (error)
937 goto fail;
938
Steven Whitehousee285c102009-09-23 13:50:49 +0100939 error = update_qd(sdp, qd);
940 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000941 goto fail_gunlock;
Steven Whitehousee285c102009-09-23 13:50:49 +0100942
David Teiglandb3b94fa2006-01-16 16:50:04 +0000943 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100944 gfs2_glock_dq_uninit(q_gh);
945 force_refresh = 0;
946 goto restart;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000947 }
948
949 return 0;
950
Steven Whitehousea91ea692006-09-04 12:04:26 -0400951fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000952 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400953fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000954 gfs2_glock_dq_uninit(q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000955 return error;
956}
957
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800958int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000959{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400960 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Abhijith Das662e3a52011-03-08 10:40:42 -0500961 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000962 unsigned int x;
963 int error = 0;
964
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100965 error = gfs2_quota_hold(ip, uid, gid);
966 if (error)
967 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000968
969 if (capable(CAP_SYS_RESOURCE) ||
970 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
971 return 0;
972
Bob Peterson5407e242012-05-18 09:28:23 -0400973 sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
974 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000975
Bob Peterson5407e242012-05-18 09:28:23 -0400976 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
Abhijith Das662e3a52011-03-08 10:40:42 -0500977 int force = NO_FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400978 qd = ip->i_res->rs_qa_qd[x];
Abhijith Das662e3a52011-03-08 10:40:42 -0500979 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
980 force = FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400981 error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000982 if (error)
983 break;
984 }
985
986 if (!error)
987 set_bit(GIF_QD_LOCKED, &ip->i_flags);
988 else {
989 while (x--)
Bob Peterson5407e242012-05-18 09:28:23 -0400990 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000991 gfs2_quota_unhold(ip);
992 }
993
994 return error;
995}
996
997static int need_sync(struct gfs2_quota_data *qd)
998{
999 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
1000 struct gfs2_tune *gt = &sdp->sd_tune;
Steven Whitehousecd915492006-09-04 12:49:07 -04001001 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001002 unsigned int num, den;
1003 int do_sync = 1;
1004
1005 if (!qd->qd_qb.qb_limit)
1006 return 0;
1007
Steven Whitehouse7d808232013-11-01 14:52:08 -04001008 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001009 value = qd->qd_change;
Steven Whitehouse7d808232013-11-01 14:52:08 -04001010 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001011
1012 spin_lock(&gt->gt_spin);
1013 num = gt->gt_quota_scale_num;
1014 den = gt->gt_quota_scale_den;
1015 spin_unlock(&gt->gt_spin);
1016
1017 if (value < 0)
1018 do_sync = 0;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001019 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1020 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001021 do_sync = 0;
1022 else {
1023 value *= gfs2_jindex_size(sdp) * num;
David Howells4abaca172008-07-11 14:39:56 +01001024 value = div_s64(value, den);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001025 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehousecd915492006-09-04 12:49:07 -04001026 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001027 do_sync = 0;
1028 }
1029
1030 return do_sync;
1031}
1032
1033void gfs2_quota_unlock(struct gfs2_inode *ip)
1034{
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001035 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001036 struct gfs2_quota_data *qda[4];
1037 unsigned int count = 0;
1038 unsigned int x;
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001039 int found;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001040
1041 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1042 goto out;
1043
Bob Peterson5407e242012-05-18 09:28:23 -04001044 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001045 struct gfs2_quota_data *qd;
1046 int sync;
1047
Bob Peterson5407e242012-05-18 09:28:23 -04001048 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001049 sync = need_sync(qd);
1050
Bob Peterson5407e242012-05-18 09:28:23 -04001051 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001052 if (!sync)
1053 continue;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001054
Steven Whitehouse7d808232013-11-01 14:52:08 -04001055 spin_lock(&qd_lock);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001056 found = qd_check_sync(sdp, qd, NULL);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001057 spin_unlock(&qd_lock);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001058
1059 if (!found)
1060 continue;
1061
1062 gfs2_assert_warn(sdp, qd->qd_change_sync);
1063 if (bh_get(qd)) {
1064 clear_bit(QDF_LOCKED, &qd->qd_flags);
1065 slot_put(qd);
1066 qd_put(qd);
1067 continue;
1068 }
1069
1070 qda[count++] = qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001071 }
1072
1073 if (count) {
1074 do_sync(count, qda);
1075 for (x = 0; x < count; x++)
1076 qd_unlock(qda[x]);
1077 }
1078
Steven Whitehousea91ea692006-09-04 12:04:26 -04001079out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001080 gfs2_quota_unhold(ip);
1081}
1082
1083#define MAX_LINE 256
1084
1085static int print_message(struct gfs2_quota_data *qd, char *type)
1086{
1087 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001088
Joe Perches8382e262014-03-06 12:10:46 -08001089 fs_info(sdp, "quota %s for %s %u\n",
1090 type,
Joe Perchesd77d1b52014-03-06 12:10:45 -08001091 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1092 from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001093
1094 return 0;
1095}
1096
Abhi Das25435e52015-03-18 12:04:37 -05001097/**
1098 * gfs2_quota_check - check if allocating new blocks will exceed quota
1099 * @ip: The inode for which this check is being performed
1100 * @uid: The uid to check against
1101 * @gid: The gid to check against
1102 * @ap: The allocation parameters. ap->target contains the requested
1103 * blocks. ap->min_target, if set, contains the minimum blks
1104 * requested.
1105 *
1106 * Returns: 0 on success.
1107 * min_req = ap->min_target ? ap->min_target : ap->target;
1108 * quota must allow atleast min_req blks for success and
1109 * ap->allowed is set to the number of blocks allowed
1110 *
1111 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1112 * of blocks available.
1113 */
Abhi Dasb8fbf472015-03-18 12:03:41 -05001114int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1115 struct gfs2_alloc_parms *ap)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001116{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001117 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001118 struct gfs2_quota_data *qd;
Abhi Das25435e52015-03-18 12:04:37 -05001119 s64 value, warn, limit;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001120 unsigned int x;
1121 int error = 0;
1122
Abhi Das25435e52015-03-18 12:04:37 -05001123 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
David Teiglandb3b94fa2006-01-16 16:50:04 +00001124 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1125 return 0;
1126
1127 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1128 return 0;
1129
Bob Peterson5407e242012-05-18 09:28:23 -04001130 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1131 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001132
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001133 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1134 qid_eq(qd->qd_id, make_kqid_gid(gid))))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001135 continue;
1136
Abhi Das25435e52015-03-18 12:04:37 -05001137 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1138 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001139 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001140 spin_lock(&qd_lock);
Abhi Das25435e52015-03-18 12:04:37 -05001141 value += qd->qd_change;
Steven Whitehouse7d808232013-11-01 14:52:08 -04001142 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001143
Abhi Das25435e52015-03-18 12:04:37 -05001144 if (limit > 0 && (limit - value) < ap->allowed)
1145 ap->allowed = limit - value;
1146 /* If we can't meet the target */
1147 if (limit && limit < (value + (s64)ap->target)) {
1148 /* If no min_target specified or we don't meet
1149 * min_target, return -EDQUOT */
1150 if (!ap->min_target || ap->min_target > ap->allowed) {
1151 print_message(qd, "exceeded");
1152 quota_send_warning(qd->qd_id,
1153 sdp->sd_vfs->s_dev,
1154 QUOTA_NL_BHARDWARN);
1155 error = -EDQUOT;
1156 break;
1157 }
1158 } else if (warn && warn < value &&
David Teiglandb3b94fa2006-01-16 16:50:04 +00001159 time_after_eq(jiffies, qd->qd_last_warn +
Abhi Das25435e52015-03-18 12:04:37 -05001160 gfs2_tune_get(sdp, gt_quota_warn_period)
1161 * HZ)) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001162 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001163 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001164 error = print_message(qd, "warning");
1165 qd->qd_last_warn = jiffies;
1166 }
1167 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001168 return error;
1169}
1170
Steven Whitehousecd915492006-09-04 12:49:07 -04001171void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001172 kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001173{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001174 struct gfs2_quota_data *qd;
1175 unsigned int x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001176
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001177 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001178 return;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001179 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001180 return;
1181
Bob Peterson5407e242012-05-18 09:28:23 -04001182 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1183 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001184
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001185 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1186 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001187 do_qc(qd, change);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001188 }
1189 }
1190}
1191
Jan Karaceed1722012-07-03 16:45:28 +02001192int gfs2_quota_sync(struct super_block *sb, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001193{
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001194 struct gfs2_sbd *sdp = sb->s_fs_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001195 struct gfs2_quota_data **qda;
Steven Whitehousebef292a2013-10-03 18:43:20 +01001196 unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001197 unsigned int num_qd;
1198 unsigned int x;
1199 int error = 0;
1200
David Teiglandb3b94fa2006-01-16 16:50:04 +00001201 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1202 if (!qda)
1203 return -ENOMEM;
1204
Steven Whitehousee46c7722013-10-04 12:29:34 +01001205 mutex_lock(&sdp->sd_quota_sync_mutex);
1206 sdp->sd_quota_sync_gen++;
1207
David Teiglandb3b94fa2006-01-16 16:50:04 +00001208 do {
1209 num_qd = 0;
1210
1211 for (;;) {
1212 error = qd_fish(sdp, qda + num_qd);
1213 if (error || !qda[num_qd])
1214 break;
1215 if (++num_qd == max_qd)
1216 break;
1217 }
1218
1219 if (num_qd) {
1220 if (!error)
1221 error = do_sync(num_qd, qda);
1222 if (!error)
1223 for (x = 0; x < num_qd; x++)
1224 qda[x]->qd_sync_gen =
1225 sdp->sd_quota_sync_gen;
1226
1227 for (x = 0; x < num_qd; x++)
1228 qd_unlock(qda[x]);
1229 }
1230 } while (!error && num_qd == max_qd);
1231
Steven Whitehousee46c7722013-10-04 12:29:34 +01001232 mutex_unlock(&sdp->sd_quota_sync_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001233 kfree(qda);
1234
1235 return error;
1236}
1237
Eric W. Biedermaned87dab2013-01-31 19:42:40 -08001238int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001239{
1240 struct gfs2_quota_data *qd;
1241 struct gfs2_holder q_gh;
1242 int error;
1243
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001244 error = qd_get(sdp, qid, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001245 if (error)
1246 return error;
1247
1248 error = do_glock(qd, FORCE, &q_gh);
1249 if (!error)
1250 gfs2_glock_dq_uninit(&q_gh);
1251
1252 qd_put(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001253 return error;
1254}
1255
David Teiglandb3b94fa2006-01-16 16:50:04 +00001256int gfs2_quota_init(struct gfs2_sbd *sdp)
1257{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001258 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001259 u64 size = i_size_read(sdp->sd_qc_inode);
1260 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001261 unsigned int x, slot = 0;
1262 unsigned int found = 0;
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001263 unsigned int hash;
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001264 unsigned int bm_size;
Steven Whitehousecd915492006-09-04 12:49:07 -04001265 u64 dblock;
1266 u32 extlen = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001267 int error;
1268
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001269 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001270 return -EIO;
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001271
David Teiglandb3b94fa2006-01-16 16:50:04 +00001272 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001273 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1274 bm_size *= sizeof(unsigned long);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001275 error = -ENOMEM;
Fabian Frederickfcf10d32014-02-26 19:07:56 +01001276 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001277 if (sdp->sd_quota_bitmap == NULL)
Fabian Frederickfcf10d32014-02-26 19:07:56 +01001278 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1279 __GFP_ZERO, PAGE_KERNEL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001280 if (!sdp->sd_quota_bitmap)
1281 return error;
1282
David Teiglandb3b94fa2006-01-16 16:50:04 +00001283 for (x = 0; x < blocks; x++) {
1284 struct buffer_head *bh;
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001285 const struct gfs2_quota_change *qc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001286 unsigned int y;
1287
1288 if (!extlen) {
1289 int new = 0;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001290 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001291 if (error)
1292 goto fail;
1293 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001294 error = -EIO;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001295 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1296 if (!bh)
1297 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001298 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1299 brelse(bh);
1300 goto fail;
1301 }
1302
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001303 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001304 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001305 y++, slot++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001306 struct gfs2_quota_data *qd;
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001307 s64 qc_change = be64_to_cpu(qc->qc_change);
1308 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1309 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1310 USRQUOTA : GRPQUOTA;
1311 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1312 be32_to_cpu(qc->qc_id));
1313 qc++;
1314 if (!qc_change)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001315 continue;
1316
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001317 hash = gfs2_qd_hash(sdp, qc_id);
1318 qd = qd_alloc(hash, sdp, qc_id);
1319 if (qd == NULL) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001320 brelse(bh);
1321 goto fail;
1322 }
1323
1324 set_bit(QDF_CHANGE, &qd->qd_flags);
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001325 qd->qd_change = qc_change;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001326 qd->qd_slot = slot;
1327 qd->qd_slot_count = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001328
Steven Whitehouse7d808232013-11-01 14:52:08 -04001329 spin_lock(&qd_lock);
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001330 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001331 list_add(&qd->qd_list, &sdp->sd_quota_list);
1332 atomic_inc(&sdp->sd_quota_count);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001333 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001334
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001335 spin_lock_bucket(hash);
1336 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1337 spin_unlock_bucket(hash);
1338
David Teiglandb3b94fa2006-01-16 16:50:04 +00001339 found++;
1340 }
1341
1342 brelse(bh);
1343 dblock++;
1344 extlen--;
1345 }
1346
1347 if (found)
1348 fs_info(sdp, "found %u quota changes\n", found);
1349
1350 return 0;
1351
Steven Whitehousea91ea692006-09-04 12:04:26 -04001352fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001353 gfs2_quota_cleanup(sdp);
1354 return error;
1355}
1356
David Teiglandb3b94fa2006-01-16 16:50:04 +00001357void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1358{
1359 struct list_head *head = &sdp->sd_quota_list;
1360 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001361
Steven Whitehouse7d808232013-11-01 14:52:08 -04001362 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001363 while (!list_empty(head)) {
1364 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1365
Abhijith Das0a7ab792009-01-07 16:03:37 -06001366 list_del(&qd->qd_list);
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001367
Abhijith Das0a7ab792009-01-07 16:03:37 -06001368 /* Also remove if this qd exists in the reclaim list */
Steven Whitehouse2147dbf2013-11-04 10:15:08 +00001369 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001370 atomic_dec(&sdp->sd_quota_count);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001371 spin_unlock(&qd_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001372
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001373 spin_lock_bucket(qd->qd_hash);
1374 hlist_bl_del_rcu(&qd->qd_hlist);
1375 spin_unlock_bucket(qd->qd_hash);
1376
Steven Whitehouse8ad151c2013-12-12 11:34:09 +00001377 gfs2_assert_warn(sdp, !qd->qd_change);
1378 gfs2_assert_warn(sdp, !qd->qd_slot_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001379 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1380
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001381 gfs2_glock_put(qd->qd_gl);
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001382 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001383
Steven Whitehouse7d808232013-11-01 14:52:08 -04001384 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001385 }
Steven Whitehouse7d808232013-11-01 14:52:08 -04001386 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001387
1388 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1389
Al Viro3cdcf632014-11-20 05:18:38 +00001390 kvfree(sdp->sd_quota_bitmap);
1391 sdp->sd_quota_bitmap = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001392}
1393
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001394static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1395{
1396 if (error == 0 || error == -EROFS)
1397 return;
1398 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1399 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1400}
1401
1402static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001403 int (*fxn)(struct super_block *sb, int type),
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001404 unsigned long t, unsigned long *timeo,
1405 unsigned int *new_timeo)
1406{
1407 if (t >= *timeo) {
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001408 int error = fxn(sdp->sd_vfs, 0);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001409 quotad_error(sdp, msg, error);
1410 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1411 } else {
1412 *timeo -= t;
1413 }
1414}
1415
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001416static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1417{
1418 struct gfs2_inode *ip;
1419
1420 while(1) {
1421 ip = NULL;
1422 spin_lock(&sdp->sd_trunc_lock);
1423 if (!list_empty(&sdp->sd_trunc_list)) {
1424 ip = list_entry(sdp->sd_trunc_list.next,
1425 struct gfs2_inode, i_trunc_list);
1426 list_del_init(&ip->i_trunc_list);
1427 }
1428 spin_unlock(&sdp->sd_trunc_lock);
1429 if (ip == NULL)
1430 return;
1431 gfs2_glock_finish_truncate(ip);
1432 }
1433}
1434
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001435void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1436 if (!sdp->sd_statfs_force_sync) {
1437 sdp->sd_statfs_force_sync = 1;
1438 wake_up(&sdp->sd_quota_wait);
1439 }
1440}
1441
1442
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001443/**
1444 * gfs2_quotad - Write cached quota changes into the quota file
1445 * @sdp: Pointer to GFS2 superblock
1446 *
1447 */
1448
1449int gfs2_quotad(void *data)
1450{
1451 struct gfs2_sbd *sdp = data;
1452 struct gfs2_tune *tune = &sdp->sd_tune;
1453 unsigned long statfs_timeo = 0;
1454 unsigned long quotad_timeo = 0;
1455 unsigned long t = 0;
1456 DEFINE_WAIT(wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001457 int empty;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001458
1459 while (!kthread_should_stop()) {
1460
1461 /* Update the master statfs file */
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001462 if (sdp->sd_statfs_force_sync) {
1463 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1464 quotad_error(sdp, "statfs", error);
1465 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1466 }
1467 else
1468 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1469 &statfs_timeo,
1470 &tune->gt_statfs_quantum);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001471
1472 /* Update quota file */
Steven Whitehouseedd2e9a2013-06-03 11:12:59 +01001473 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001474 &quotad_timeo, &tune->gt_quota_quantum);
1475
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001476 /* Check for & recover partially truncated inodes */
1477 quotad_check_trunc_list(sdp);
1478
Tejun Heoa0acae02011-11-21 12:32:22 -08001479 try_to_freeze();
1480
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001481 t = min(quotad_timeo, statfs_timeo);
1482
Steven Whitehouse7fa5d202009-03-31 15:49:08 +01001483 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001484 spin_lock(&sdp->sd_trunc_lock);
1485 empty = list_empty(&sdp->sd_trunc_list);
1486 spin_unlock(&sdp->sd_trunc_lock);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001487 if (empty && !sdp->sd_statfs_force_sync)
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001488 t -= schedule_timeout(t);
1489 else
1490 t = 0;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001491 finish_wait(&sdp->sd_quota_wait, &wait);
1492 }
1493
1494 return 0;
1495}
1496
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001497static int gfs2_quota_get_xstate(struct super_block *sb,
1498 struct fs_quota_stat *fqs)
1499{
1500 struct gfs2_sbd *sdp = sb->s_fs_info;
1501
1502 memset(fqs, 0, sizeof(struct fs_quota_stat));
1503 fqs->qs_version = FS_QSTAT_VERSION;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001504
1505 switch (sdp->sd_args.ar_quota) {
1506 case GFS2_QUOTA_ON:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001507 fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001508 /*FALLTHRU*/
1509 case GFS2_QUOTA_ACCOUNT:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001510 fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001511 break;
1512 case GFS2_QUOTA_OFF:
1513 break;
1514 }
1515
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001516 if (sdp->sd_quota_inode) {
1517 fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1518 fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
1519 }
1520 fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
1521 fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
Steven Whitehouse2147dbf2013-11-04 10:15:08 +00001522 fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru);
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001523 return 0;
1524}
1525
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001526static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
Jan Kara14bf61f2014-10-09 16:03:13 +02001527 struct qc_dqblk *fdq)
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001528{
1529 struct gfs2_sbd *sdp = sb->s_fs_info;
1530 struct gfs2_quota_lvb *qlvb;
1531 struct gfs2_quota_data *qd;
1532 struct gfs2_holder q_gh;
1533 int error;
1534
Jan Kara14bf61f2014-10-09 16:03:13 +02001535 memset(fdq, 0, sizeof(*fdq));
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001536
1537 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1538 return -ESRCH; /* Crazy XFS error code */
1539
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001540 if ((qid.type != USRQUOTA) &&
1541 (qid.type != GRPQUOTA))
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001542 return -EINVAL;
1543
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001544 error = qd_get(sdp, qid, &qd);
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001545 if (error)
1546 return error;
1547 error = do_glock(qd, FORCE, &q_gh);
1548 if (error)
1549 goto out;
1550
David Teigland4e2f8842012-11-14 13:47:37 -05001551 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Jan Kara14bf61f2014-10-09 16:03:13 +02001552 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1553 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1554 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001555
1556 gfs2_glock_dq_uninit(&q_gh);
1557out:
1558 qd_put(qd);
1559 return error;
1560}
1561
Steven Whitehousee285c102009-09-23 13:50:49 +01001562/* GFS2 only supports a subset of the XFS fields */
Jan Kara14bf61f2014-10-09 16:03:13 +02001563#define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
Steven Whitehousee285c102009-09-23 13:50:49 +01001564
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001565static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
Jan Kara14bf61f2014-10-09 16:03:13 +02001566 struct qc_dqblk *fdq)
Steven Whitehousee285c102009-09-23 13:50:49 +01001567{
1568 struct gfs2_sbd *sdp = sb->s_fs_info;
1569 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1570 struct gfs2_quota_data *qd;
1571 struct gfs2_holder q_gh, i_gh;
1572 unsigned int data_blocks, ind_blocks;
1573 unsigned int blocks = 0;
1574 int alloc_required;
Steven Whitehousee285c102009-09-23 13:50:49 +01001575 loff_t offset;
1576 int error;
1577
1578 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1579 return -ESRCH; /* Crazy XFS error code */
1580
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001581 if ((qid.type != USRQUOTA) &&
1582 (qid.type != GRPQUOTA))
Steven Whitehousee285c102009-09-23 13:50:49 +01001583 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001584
1585 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1586 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001587
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001588 error = qd_get(sdp, qid, &qd);
Steven Whitehousee285c102009-09-23 13:50:49 +01001589 if (error)
1590 return error;
1591
Bob Peterson0a305e42012-06-06 11:17:59 +01001592 error = gfs2_rs_alloc(ip);
1593 if (error)
1594 goto out_put;
1595
Steven Whitehousee285c102009-09-23 13:50:49 +01001596 mutex_lock(&ip->i_inode.i_mutex);
1597 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1598 if (error)
Bob Peterson0a305e42012-06-06 11:17:59 +01001599 goto out_unlockput;
Steven Whitehousee285c102009-09-23 13:50:49 +01001600 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1601 if (error)
1602 goto out_q;
1603
1604 /* Check for existing entry, if none then alloc new blocks */
1605 error = update_qd(sdp, qd);
1606 if (error)
1607 goto out_i;
1608
1609 /* If nothing has changed, this is a no-op */
Jan Kara14bf61f2014-10-09 16:03:13 +02001610 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1611 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1612 fdq->d_fieldmask ^= QC_SPC_SOFT;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001613
Jan Kara14bf61f2014-10-09 16:03:13 +02001614 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1615 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1616 fdq->d_fieldmask ^= QC_SPC_HARD;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001617
Jan Kara14bf61f2014-10-09 16:03:13 +02001618 if ((fdq->d_fieldmask & QC_SPACE) &&
1619 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1620 fdq->d_fieldmask ^= QC_SPACE;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001621
Steven Whitehousee285c102009-09-23 13:50:49 +01001622 if (fdq->d_fieldmask == 0)
1623 goto out_i;
1624
1625 offset = qd2offset(qd);
Bob Peterson461cb412010-06-24 19:21:20 -04001626 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
Abhijith Dase79a46a2011-02-07 11:22:41 -05001627 if (gfs2_is_stuffed(ip))
1628 alloc_required = 1;
Steven Whitehousee285c102009-09-23 13:50:49 +01001629 if (alloc_required) {
Steven Whitehouse7b9cff42013-10-02 11:13:25 +01001630 struct gfs2_alloc_parms ap = { .aflags = 0, };
Steven Whitehousee285c102009-09-23 13:50:49 +01001631 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1632 &data_blocks, &ind_blocks);
Bob Peterson564e12b2011-11-21 13:36:17 -05001633 blocks = 1 + data_blocks + ind_blocks;
Steven Whitehouse7b9cff42013-10-02 11:13:25 +01001634 ap.target = blocks;
1635 error = gfs2_inplace_reserve(ip, &ap);
Steven Whitehousee285c102009-09-23 13:50:49 +01001636 if (error)
Bob Peterson564e12b2011-11-21 13:36:17 -05001637 goto out_i;
Steven Whitehouse71f890f2012-07-30 14:53:19 +01001638 blocks += gfs2_rg_blocks(ip, blocks);
Steven Whitehousee285c102009-09-23 13:50:49 +01001639 }
1640
Abhijith Dase79a46a2011-02-07 11:22:41 -05001641 /* Some quotas span block boundaries and can update two blocks,
1642 adding an extra block to the transaction to handle such quotas */
1643 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001644 if (error)
1645 goto out_release;
1646
1647 /* Apply changes */
1648 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1649
1650 gfs2_trans_end(sdp);
1651out_release:
Bob Peterson564e12b2011-11-21 13:36:17 -05001652 if (alloc_required)
Steven Whitehousee285c102009-09-23 13:50:49 +01001653 gfs2_inplace_release(ip);
Steven Whitehousee285c102009-09-23 13:50:49 +01001654out_i:
1655 gfs2_glock_dq_uninit(&i_gh);
1656out_q:
1657 gfs2_glock_dq_uninit(&q_gh);
Bob Peterson0a305e42012-06-06 11:17:59 +01001658out_unlockput:
Steven Whitehousee285c102009-09-23 13:50:49 +01001659 mutex_unlock(&ip->i_inode.i_mutex);
Bob Peterson0a305e42012-06-06 11:17:59 +01001660out_put:
Steven Whitehousee285c102009-09-23 13:50:49 +01001661 qd_put(qd);
1662 return error;
1663}
1664
Steven Whitehousecc632e72009-09-15 09:59:02 +01001665const struct quotactl_ops gfs2_quotactl_ops = {
1666 .quota_sync = gfs2_quota_sync,
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001667 .get_xstate = gfs2_quota_get_xstate,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001668 .get_dqblk = gfs2_get_dqblk,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001669 .set_dqblk = gfs2_set_dqblk,
Steven Whitehousecc632e72009-09-15 09:59:02 +01001670};
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001671
1672void __init gfs2_quota_hash_init(void)
1673{
1674 unsigned i;
1675
1676 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1677 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);
1678}