blob: c4effff7cf559c701e890e804cef81dfb1cac30e [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
148static enum lru_status gfs2_qd_isolate(struct list_head *item, spinlock_t *lock, void *arg)
149{
150 struct list_head *dispose = arg;
151 struct gfs2_quota_data *qd = list_entry(item, struct gfs2_quota_data, qd_lru);
152
153 if (!spin_trylock(&qd->qd_lockref.lock))
154 return LRU_SKIP;
155
156 if (qd->qd_lockref.count == 0) {
157 lockref_mark_dead(&qd->qd_lockref);
158 list_move(&qd->qd_lru, dispose);
159 }
160
161 spin_unlock(&qd->qd_lockref.lock);
162 return LRU_REMOVED;
163}
164
165static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
166 struct shrink_control *sc)
167{
168 LIST_HEAD(dispose);
169 unsigned long freed;
170
171 if (!(sc->gfp_mask & __GFP_FS))
172 return SHRINK_STOP;
173
174 freed = list_lru_walk_node(&gfs2_qd_lru, sc->nid, gfs2_qd_isolate,
175 &dispose, &sc->nr_to_scan);
176
177 gfs2_qd_dispose(&dispose);
178
Dave Chinner1ab6c492013-08-28 10:18:09 +1000179 return freed;
180}
Abhijith Das0a7ab792009-01-07 16:03:37 -0600181
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000182static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
183 struct shrink_control *sc)
Dave Chinner1ab6c492013-08-28 10:18:09 +1000184{
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000185 return vfs_pressure_ratio(list_lru_count_node(&gfs2_qd_lru, sc->nid));
Abhijith Das0a7ab792009-01-07 16:03:37 -0600186}
187
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000188struct shrinker gfs2_qd_shrinker = {
189 .count_objects = gfs2_qd_shrink_count,
190 .scan_objects = gfs2_qd_shrink_scan,
191 .seeks = DEFAULT_SEEKS,
192 .flags = SHRINKER_NUMA_AWARE,
193};
194
195
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800196static u64 qd2index(struct gfs2_quota_data *qd)
197{
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800198 struct kqid qid = qd->qd_id;
199 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
Bob Peterson37f71572013-05-10 11:59:18 -0400200 ((qid.type == USRQUOTA) ? 0 : 1);
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800201}
202
Steven Whitehousecd915492006-09-04 12:49:07 -0400203static u64 qd2offset(struct gfs2_quota_data *qd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000204{
Steven Whitehousecd915492006-09-04 12:49:07 -0400205 u64 offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000206
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800207 offset = qd2index(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000208 offset *= sizeof(struct gfs2_quota);
209
210 return offset;
211}
212
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000213static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000214{
215 struct gfs2_quota_data *qd;
216 int error;
217
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000218 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000219 if (!qd)
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000220 return NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000221
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000222 qd->qd_sbd = sdp;
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400223 qd->qd_lockref.count = 1;
224 spin_lock_init(&qd->qd_lockref.lock);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800225 qd->qd_id = qid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000226 qd->qd_slot = -1;
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000227 INIT_LIST_HEAD(&qd->qd_lru);
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000228 qd->qd_hash = hash;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000229
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800230 error = gfs2_glock_get(sdp, qd2index(qd),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000231 &gfs2_quota_glops, CREATE, &qd->qd_gl);
232 if (error)
233 goto fail;
234
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000235 return qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000236
Steven Whitehousea91ea692006-09-04 12:04:26 -0400237fail:
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000238 kmem_cache_free(gfs2_quotad_cachep, qd);
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000239 return NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000240}
241
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000242static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
243 const struct gfs2_sbd *sdp,
244 struct kqid qid)
245{
246 struct gfs2_quota_data *qd;
247 struct hlist_bl_node *h;
248
249 hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
250 if (!qid_eq(qd->qd_id, qid))
251 continue;
252 if (qd->qd_sbd != sdp)
253 continue;
254 if (lockref_get_not_dead(&qd->qd_lockref)) {
255 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
256 return qd;
257 }
258 }
259
260 return NULL;
261}
262
263
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800264static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000265 struct gfs2_quota_data **qdp)
266{
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000267 struct gfs2_quota_data *qd, *new_qd;
268 unsigned int hash = gfs2_qd_hash(sdp, qid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000269
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000270 rcu_read_lock();
271 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
272 rcu_read_unlock();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000273
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000274 if (qd)
275 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000276
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000277 new_qd = qd_alloc(hash, sdp, qid);
278 if (!new_qd)
279 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000280
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000281 spin_lock(&qd_lock);
282 spin_lock_bucket(hash);
283 *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
284 if (qd == NULL) {
285 *qdp = new_qd;
286 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
287 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
288 atomic_inc(&sdp->sd_quota_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000289 }
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000290 spin_unlock_bucket(hash);
291 spin_unlock(&qd_lock);
292
293 if (qd) {
294 gfs2_glock_put(new_qd->qd_gl);
295 kmem_cache_free(gfs2_quotad_cachep, new_qd);
296 }
297
298 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000299}
300
Steven Whitehousec754fbb2013-12-12 10:47:59 +0000301
David Teiglandb3b94fa2006-01-16 16:50:04 +0000302static void qd_hold(struct gfs2_quota_data *qd)
303{
304 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400305 gfs2_assert(sdp, !__lockref_is_dead(&qd->qd_lockref));
306 lockref_get(&qd->qd_lockref);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000307}
308
309static void qd_put(struct gfs2_quota_data *qd)
310{
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000311 if (lockref_put_or_lock(&qd->qd_lockref))
312 return;
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400313
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000314 qd->qd_lockref.count = 0;
315 list_lru_add(&gfs2_qd_lru, &qd->qd_lru);
316 spin_unlock(&qd->qd_lockref.lock);
Steven Whitehouse9b9f0392013-11-01 14:52:06 -0400317
David Teiglandb3b94fa2006-01-16 16:50:04 +0000318}
319
320static int slot_get(struct gfs2_quota_data *qd)
321{
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000322 struct gfs2_sbd *sdp = qd->qd_sbd;
323 unsigned int bit;
324 int error = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000325
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000326 spin_lock(&sdp->sd_bitmap_lock);
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000327 if (qd->qd_slot_count != 0)
328 goto out;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000329
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000330 error = -ENOSPC;
331 bit = find_first_zero_bit(sdp->sd_quota_bitmap, sdp->sd_quota_slots);
332 if (bit < sdp->sd_quota_slots) {
333 set_bit(bit, sdp->sd_quota_bitmap);
334 qd->qd_slot = bit;
Abhi Dase9fb7c72014-03-31 01:19:29 -0500335 error = 0;
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000336out:
337 qd->qd_slot_count++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000338 }
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000339 spin_unlock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000341 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000342}
343
344static void slot_hold(struct gfs2_quota_data *qd)
345{
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000346 struct gfs2_sbd *sdp = qd->qd_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000347
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000348 spin_lock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000349 gfs2_assert(sdp, qd->qd_slot_count);
350 qd->qd_slot_count++;
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000351 spin_unlock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000352}
353
354static void slot_put(struct gfs2_quota_data *qd)
355{
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000356 struct gfs2_sbd *sdp = qd->qd_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000357
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000358 spin_lock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000359 gfs2_assert(sdp, qd->qd_slot_count);
360 if (!--qd->qd_slot_count) {
Steven Whitehouseee2411a2013-12-12 17:29:32 +0000361 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000362 qd->qd_slot = -1;
363 }
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000364 spin_unlock(&sdp->sd_bitmap_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000365}
366
367static int bh_get(struct gfs2_quota_data *qd)
368{
369 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400370 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000371 unsigned int block, offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000372 struct buffer_head *bh;
373 int error;
Steven Whitehouse23591252006-10-13 17:25:45 -0400374 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000375
Steven Whitehousef55ab262006-02-21 12:51:39 +0000376 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000377
378 if (qd->qd_bh_count++) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000379 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000380 return 0;
381 }
382
383 block = qd->qd_slot / sdp->sd_qc_per_block;
Bob Peterson0d0868b2007-12-11 18:51:25 -0600384 offset = qd->qd_slot % sdp->sd_qc_per_block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000385
Steven Whitehouse23591252006-10-13 17:25:45 -0400386 bh_map.b_size = 1 << ip->i_inode.i_blkbits;
Bob Petersone9e1ef22007-12-10 14:13:27 -0600387 error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000388 if (error)
389 goto fail;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400390 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000391 if (error)
392 goto fail;
393 error = -EIO;
394 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
395 goto fail_brelse;
396
397 qd->qd_bh = bh;
398 qd->qd_bh_qc = (struct gfs2_quota_change *)
399 (bh->b_data + sizeof(struct gfs2_meta_header) +
400 offset * sizeof(struct gfs2_quota_change));
401
Josef Whiter2e95b662007-02-20 00:03:29 -0500402 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000403
404 return 0;
405
Steven Whitehousea91ea692006-09-04 12:04:26 -0400406fail_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000407 brelse(bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400408fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000409 qd->qd_bh_count--;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000410 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000411 return error;
412}
413
414static void bh_put(struct gfs2_quota_data *qd)
415{
416 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
417
Steven Whitehousef55ab262006-02-21 12:51:39 +0000418 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000419 gfs2_assert(sdp, qd->qd_bh_count);
420 if (!--qd->qd_bh_count) {
421 brelse(qd->qd_bh);
422 qd->qd_bh = NULL;
423 qd->qd_bh_qc = NULL;
424 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000425 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000426}
427
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100428static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
429 u64 *sync_gen)
430{
431 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
432 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
433 (sync_gen && (qd->qd_sync_gen >= *sync_gen)))
434 return 0;
435
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000436 if (!lockref_get_not_dead(&qd->qd_lockref))
437 return 0;
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100438
Steven Whitehouse2147dbf2013-11-04 10:15:08 +0000439 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100440 set_bit(QDF_LOCKED, &qd->qd_flags);
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100441 qd->qd_change_sync = qd->qd_change;
Steven Whitehouse2d9e7232013-12-13 11:46:28 +0000442 slot_hold(qd);
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100443 return 1;
444}
445
David Teiglandb3b94fa2006-01-16 16:50:04 +0000446static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
447{
448 struct gfs2_quota_data *qd = NULL;
449 int error;
450 int found = 0;
451
452 *qdp = NULL;
453
454 if (sdp->sd_vfs->s_flags & MS_RDONLY)
455 return 0;
456
Steven Whitehouse7d808232013-11-01 14:52:08 -0400457 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000458
459 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
Steven Whitehouse1bf59bf2013-10-04 11:14:46 +0100460 found = qd_check_sync(sdp, qd, &sdp->sd_quota_sync_gen);
461 if (found)
462 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000463 }
464
465 if (!found)
466 qd = NULL;
467
Steven Whitehouse7d808232013-11-01 14:52:08 -0400468 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000469
470 if (qd) {
471 gfs2_assert_warn(sdp, qd->qd_change_sync);
472 error = bh_get(qd);
473 if (error) {
474 clear_bit(QDF_LOCKED, &qd->qd_flags);
475 slot_put(qd);
476 qd_put(qd);
477 return error;
478 }
479 }
480
481 *qdp = qd;
482
483 return 0;
484}
485
David Teiglandb3b94fa2006-01-16 16:50:04 +0000486static void qd_unlock(struct gfs2_quota_data *qd)
487{
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500488 gfs2_assert_warn(qd->qd_gl->gl_sbd,
489 test_bit(QDF_LOCKED, &qd->qd_flags));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000490 clear_bit(QDF_LOCKED, &qd->qd_flags);
491 bh_put(qd);
492 slot_put(qd);
493 qd_put(qd);
494}
495
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800496static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000497 struct gfs2_quota_data **qdp)
498{
499 int error;
500
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800501 error = qd_get(sdp, qid, qdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000502 if (error)
503 return error;
504
505 error = slot_get(*qdp);
506 if (error)
507 goto fail;
508
509 error = bh_get(*qdp);
510 if (error)
511 goto fail_slot;
512
513 return 0;
514
Steven Whitehousea91ea692006-09-04 12:04:26 -0400515fail_slot:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000516 slot_put(*qdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400517fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000518 qd_put(*qdp);
519 return error;
520}
521
522static void qdsb_put(struct gfs2_quota_data *qd)
523{
524 bh_put(qd);
525 slot_put(qd);
526 qd_put(qd);
527}
528
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800529int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000530{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400531 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Bob Peterson5407e242012-05-18 09:28:23 -0400532 struct gfs2_quota_data **qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000533 int error;
534
Andrew Priceaaaf68c2012-10-12 16:45:08 +0100535 if (ip->i_res == NULL) {
536 error = gfs2_rs_alloc(ip);
537 if (error)
538 return error;
539 }
Bob Peterson5407e242012-05-18 09:28:23 -0400540
541 qd = ip->i_res->rs_qa_qd;
542
543 if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
David Teiglandb3b94fa2006-01-16 16:50:04 +0000544 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
545 return -EIO;
546
547 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
548 return 0;
549
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800550 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000551 if (error)
552 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400553 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000554 qd++;
555
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800556 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000557 if (error)
558 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400559 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000560 qd++;
561
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800562 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
563 !uid_eq(uid, ip->i_inode.i_uid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800564 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000565 if (error)
566 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400567 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000568 qd++;
569 }
570
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800571 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
572 !gid_eq(gid, ip->i_inode.i_gid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800573 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000574 if (error)
575 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400576 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000577 qd++;
578 }
579
Steven Whitehousea91ea692006-09-04 12:04:26 -0400580out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000581 if (error)
582 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000583 return error;
584}
585
586void gfs2_quota_unhold(struct gfs2_inode *ip)
587{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400588 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000589 unsigned int x;
590
Bob Peterson5407e242012-05-18 09:28:23 -0400591 if (ip->i_res == NULL)
592 return;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000593 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
594
Bob Peterson5407e242012-05-18 09:28:23 -0400595 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
596 qdsb_put(ip->i_res->rs_qa_qd[x]);
597 ip->i_res->rs_qa_qd[x] = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000598 }
Bob Peterson5407e242012-05-18 09:28:23 -0400599 ip->i_res->rs_qa_qd_num = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000600}
601
602static int sort_qd(const void *a, const void *b)
603{
Steven Whitehouse48fac172006-09-05 15:17:12 -0400604 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
605 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800607 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400608 return -1;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800609 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400610 return 1;
Steven Whitehouse48fac172006-09-05 15:17:12 -0400611 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000612}
613
Steven Whitehousecd915492006-09-04 12:49:07 -0400614static void do_qc(struct gfs2_quota_data *qd, s64 change)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000615{
616 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400617 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000618 struct gfs2_quota_change *qc = qd->qd_bh_qc;
Steven Whitehousecd915492006-09-04 12:49:07 -0400619 s64 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000620
Steven Whitehousef55ab262006-02-21 12:51:39 +0000621 mutex_lock(&sdp->sd_quota_mutex);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000622 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000623
624 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
625 qc->qc_change = 0;
626 qc->qc_flags = 0;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800627 if (qd->qd_id.type == USRQUOTA)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000628 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800629 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000630 }
631
Al Virob44b84d2006-10-14 10:46:30 -0400632 x = be64_to_cpu(qc->qc_change) + change;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000633 qc->qc_change = cpu_to_be64(x);
634
Steven Whitehouse7d808232013-11-01 14:52:08 -0400635 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000636 qd->qd_change = x;
Steven Whitehouse7d808232013-11-01 14:52:08 -0400637 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000638
639 if (!x) {
640 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
641 clear_bit(QDF_CHANGE, &qd->qd_flags);
642 qc->qc_flags = 0;
643 qc->qc_id = 0;
644 slot_put(qd);
645 qd_put(qd);
646 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
647 qd_hold(qd);
648 slot_hold(qd);
649 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400650
Steven Whitehousef55ab262006-02-21 12:51:39 +0000651 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000652}
653
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000654/**
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100655 * gfs2_adjust_quota - adjust record of current block usage
656 * @ip: The quota inode
657 * @loc: Offset of the entry in the quota file
Steven Whitehousee285c102009-09-23 13:50:49 +0100658 * @change: The amount of usage change to record
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100659 * @qd: The quota data
Steven Whitehousee285c102009-09-23 13:50:49 +0100660 * @fdq: The updated limits to record
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000661 *
662 * This function was mostly borrowed from gfs2_block_truncate_page which was
663 * in turn mostly borrowed from ext3
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100664 *
665 * Returns: 0 or -ve on error
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000666 */
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100667
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000668static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
Steven Whitehousee285c102009-09-23 13:50:49 +0100669 s64 change, struct gfs2_quota_data *qd,
670 struct fs_disk_quota *fdq)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000671{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400672 struct inode *inode = &ip->i_inode;
Abhijith Das14870b42010-11-18 11:24:24 -0500673 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000674 struct address_space *mapping = inode->i_mapping;
675 unsigned long index = loc >> PAGE_CACHE_SHIFT;
Abhijith Das1990e912007-05-31 17:52:02 -0500676 unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000677 unsigned blocksize, iblock, pos;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100678 struct buffer_head *bh;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000679 struct page *page;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400680 void *kaddr, *ptr;
Al Viro951b4bd2013-06-02 19:53:40 -0400681 struct gfs2_quota q;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400682 int err, nbytes;
Steven Whitehousee285c102009-09-23 13:50:49 +0100683 u64 size;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000684
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100685 if (gfs2_is_stuffed(ip)) {
686 err = gfs2_unstuff_dinode(ip, NULL);
687 if (err)
688 return err;
689 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400690
691 memset(&q, 0, sizeof(struct gfs2_quota));
Andrew Price43066292012-04-16 16:40:55 +0100692 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
Abhijith Das7e619bc2010-05-07 17:50:18 -0400693 if (err < 0)
694 return err;
695
696 err = -EIO;
Al Viro951b4bd2013-06-02 19:53:40 -0400697 be64_add_cpu(&q.qu_value, change);
698 qd->qd_qb.qb_value = q.qu_value;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400699 if (fdq) {
700 if (fdq->d_fieldmask & FS_DQ_BSOFT) {
Al Viro951b4bd2013-06-02 19:53:40 -0400701 q.qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift);
702 qd->qd_qb.qb_warn = q.qu_warn;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400703 }
704 if (fdq->d_fieldmask & FS_DQ_BHARD) {
Al Viro951b4bd2013-06-02 19:53:40 -0400705 q.qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift);
706 qd->qd_qb.qb_limit = q.qu_limit;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400707 }
Abhijith Das802ec9b2010-11-18 11:26:46 -0500708 if (fdq->d_fieldmask & FS_DQ_BCOUNT) {
Al Viro951b4bd2013-06-02 19:53:40 -0400709 q.qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift);
710 qd->qd_qb.qb_value = q.qu_value;
Abhijith Das802ec9b2010-11-18 11:26:46 -0500711 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400712 }
713
714 /* Write the quota into the quota file on disk */
Al Viro951b4bd2013-06-02 19:53:40 -0400715 ptr = &q;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400716 nbytes = sizeof(struct gfs2_quota);
717get_a_page:
Bob Peterson220cca22012-03-19 15:25:50 -0400718 page = find_or_create_page(mapping, index, GFP_NOFS);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000719 if (!page)
720 return -ENOMEM;
721
722 blocksize = inode->i_sb->s_blocksize;
723 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
724
725 if (!page_has_buffers(page))
726 create_empty_buffers(page, blocksize, 0);
727
728 bh = page_buffers(page);
729 pos = blocksize;
730 while (offset >= pos) {
731 bh = bh->b_this_page;
732 iblock++;
733 pos += blocksize;
734 }
735
736 if (!buffer_mapped(bh)) {
Bob Petersone9e1ef22007-12-10 14:13:27 -0600737 gfs2_block_map(inode, iblock, bh, 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000738 if (!buffer_mapped(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400739 goto unlock_out;
740 /* If it's a newly allocated disk block for quota, zero it */
Abhijith Das8b421602010-07-04 01:33:24 -0400741 if (buffer_new(bh))
742 zero_user(page, pos - blocksize, bh->b_size);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000743 }
744
745 if (PageUptodate(page))
746 set_buffer_uptodate(bh);
747
748 if (!buffer_uptodate(bh)) {
Steven Whitehouse20ed0532011-10-31 09:52:02 +0000749 ll_rw_block(READ | REQ_META, 1, &bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000750 wait_on_buffer(bh);
751 if (!buffer_uptodate(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400752 goto unlock_out;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000753 }
754
Bob Peterson37f71572013-05-10 11:59:18 -0400755 gfs2_trans_add_data(ip->i_gl, bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000756
Cong Wangd9349282011-11-25 23:14:30 +0800757 kaddr = kmap_atomic(page);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400758 if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
759 nbytes = PAGE_CACHE_SIZE - offset;
760 memcpy(kaddr + offset, ptr, nbytes);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000761 flush_dcache_page(page);
Cong Wangd9349282011-11-25 23:14:30 +0800762 kunmap_atomic(kaddr);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400763 unlock_page(page);
764 page_cache_release(page);
Steven Whitehousee285c102009-09-23 13:50:49 +0100765
Abhijith Das7e619bc2010-05-07 17:50:18 -0400766 /* If quota straddles page boundary, we need to update the rest of the
767 * quota at the beginning of the next page */
Abhijith Das8b421602010-07-04 01:33:24 -0400768 if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
Abhijith Das7e619bc2010-05-07 17:50:18 -0400769 ptr = ptr + nbytes;
770 nbytes = sizeof(struct gfs2_quota) - nbytes;
771 offset = 0;
772 index++;
773 goto get_a_page;
774 }
775
Steven Whitehousee285c102009-09-23 13:50:49 +0100776 size = loc + sizeof(struct gfs2_quota);
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100777 if (size > inode->i_size)
Steven Whitehousee285c102009-09-23 13:50:49 +0100778 i_size_write(inode, size);
Steven Whitehousee285c102009-09-23 13:50:49 +0100779 inode->i_mtime = inode->i_atime = CURRENT_TIME;
Steven Whitehousee285c102009-09-23 13:50:49 +0100780 mark_inode_dirty(inode);
Bob Peterson500242a2012-05-15 14:51:54 -0400781 return 0;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100782
Abhijith Das7e619bc2010-05-07 17:50:18 -0400783unlock_out:
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000784 unlock_page(page);
785 page_cache_release(page);
786 return err;
787}
788
David Teiglandb3b94fa2006-01-16 16:50:04 +0000789static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
790{
791 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400792 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100793 struct gfs2_alloc_parms ap = { .aflags = 0, };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000794 unsigned int data_blocks, ind_blocks;
795 struct gfs2_holder *ghs, i_gh;
796 unsigned int qx, x;
797 struct gfs2_quota_data *qd;
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100798 unsigned reserved;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000799 loff_t offset;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600800 unsigned int nalloc = 0, blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000801 int error;
802
Bob Peterson0a305e42012-06-06 11:17:59 +0100803 error = gfs2_rs_alloc(ip);
804 if (error)
805 return error;
806
David Teiglandb3b94fa2006-01-16 16:50:04 +0000807 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
808 &data_blocks, &ind_blocks);
809
Josef Bacik16c5f062008-04-09 09:33:41 -0400810 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000811 if (!ghs)
812 return -ENOMEM;
813
814 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
Jan Kara56aa72d2012-09-05 16:55:11 -0400815 mutex_lock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000816 for (qx = 0; qx < num_qd; qx++) {
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100817 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000818 GL_NOCACHE, &ghs[qx]);
819 if (error)
820 goto out;
821 }
822
823 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
824 if (error)
825 goto out;
826
827 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000828 offset = qd2offset(qda[x]);
Bob Peterson461cb412010-06-24 19:21:20 -0400829 if (gfs2_write_alloc_required(ip, offset,
830 sizeof(struct gfs2_quota)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000831 nalloc++;
832 }
833
Abhijith Das20b95bf2008-03-06 17:43:52 -0600834 /*
835 * 1 blk for unstuffing inode if stuffed. We add this extra
836 * block to the reservation unconditionally. If the inode
837 * doesn't need unstuffing, the block will be released to the
838 * rgrp since it won't be allocated during the transaction
839 */
Abhijith Das7e619bc2010-05-07 17:50:18 -0400840 /* +3 in the end for unstuffing block, inode size update block
841 * and another block in case quota straddles page boundary and
842 * two blocks need to be updated instead of 1 */
843 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600844
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100845 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100846 ap.target = reserved;
847 error = gfs2_inplace_reserve(ip, &ap);
Abhijith Das20b95bf2008-03-06 17:43:52 -0600848 if (error)
849 goto out_alloc;
850
851 if (nalloc)
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100852 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600853
854 error = gfs2_trans_begin(sdp, blocks, 0);
855 if (error)
856 goto out_ipres;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000857
858 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000859 qd = qda[x];
860 offset = qd2offset(qd);
Steven Whitehousee285c102009-09-23 13:50:49 +0100861 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000862 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000863 goto out_end_trans;
864
David Teiglandb3b94fa2006-01-16 16:50:04 +0000865 do_qc(qd, -qd->qd_change_sync);
Abhijith Das662e3a52011-03-08 10:40:42 -0500866 set_bit(QDF_REFRESH, &qd->qd_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000867 }
868
869 error = 0;
870
Steven Whitehousea91ea692006-09-04 12:04:26 -0400871out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000872 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400873out_ipres:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600874 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400875out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000876 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400877out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000878 while (qx--)
879 gfs2_glock_dq_uninit(&ghs[qx]);
Steven Whitehousee285c102009-09-23 13:50:49 +0100880 mutex_unlock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000881 kfree(ghs);
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400882 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000883 return error;
884}
885
Steven Whitehousee285c102009-09-23 13:50:49 +0100886static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
887{
888 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
889 struct gfs2_quota q;
890 struct gfs2_quota_lvb *qlvb;
891 loff_t pos;
892 int error;
893
894 memset(&q, 0, sizeof(struct gfs2_quota));
895 pos = qd2offset(qd);
Andrew Price43066292012-04-16 16:40:55 +0100896 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
Steven Whitehousee285c102009-09-23 13:50:49 +0100897 if (error < 0)
898 return error;
899
David Teigland4e2f8842012-11-14 13:47:37 -0500900 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehousee285c102009-09-23 13:50:49 +0100901 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
902 qlvb->__pad = 0;
903 qlvb->qb_limit = q.qu_limit;
904 qlvb->qb_warn = q.qu_warn;
905 qlvb->qb_value = q.qu_value;
906 qd->qd_qb = *qlvb;
907
908 return 0;
909}
910
David Teiglandb3b94fa2006-01-16 16:50:04 +0000911static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
912 struct gfs2_holder *q_gh)
913{
914 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400915 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000916 struct gfs2_holder i_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000917 int error;
918
Steven Whitehousea91ea692006-09-04 12:04:26 -0400919restart:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000920 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
921 if (error)
922 return error;
923
David Teigland4e2f8842012-11-14 13:47:37 -0500924 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000925
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400926 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000927 gfs2_glock_dq_uninit(q_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100928 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
929 GL_NOCACHE, q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000930 if (error)
931 return error;
932
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400933 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000934 if (error)
935 goto fail;
936
Steven Whitehousee285c102009-09-23 13:50:49 +0100937 error = update_qd(sdp, qd);
938 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000939 goto fail_gunlock;
Steven Whitehousee285c102009-09-23 13:50:49 +0100940
David Teiglandb3b94fa2006-01-16 16:50:04 +0000941 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100942 gfs2_glock_dq_uninit(q_gh);
943 force_refresh = 0;
944 goto restart;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000945 }
946
947 return 0;
948
Steven Whitehousea91ea692006-09-04 12:04:26 -0400949fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000950 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400951fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000952 gfs2_glock_dq_uninit(q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000953 return error;
954}
955
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800956int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000957{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400958 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Abhijith Das662e3a52011-03-08 10:40:42 -0500959 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000960 unsigned int x;
961 int error = 0;
962
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100963 error = gfs2_quota_hold(ip, uid, gid);
964 if (error)
965 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000966
967 if (capable(CAP_SYS_RESOURCE) ||
968 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
969 return 0;
970
Bob Peterson5407e242012-05-18 09:28:23 -0400971 sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
972 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000973
Bob Peterson5407e242012-05-18 09:28:23 -0400974 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
Abhijith Das662e3a52011-03-08 10:40:42 -0500975 int force = NO_FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400976 qd = ip->i_res->rs_qa_qd[x];
Abhijith Das662e3a52011-03-08 10:40:42 -0500977 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
978 force = FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400979 error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000980 if (error)
981 break;
982 }
983
984 if (!error)
985 set_bit(GIF_QD_LOCKED, &ip->i_flags);
986 else {
987 while (x--)
Bob Peterson5407e242012-05-18 09:28:23 -0400988 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000989 gfs2_quota_unhold(ip);
990 }
991
992 return error;
993}
994
995static int need_sync(struct gfs2_quota_data *qd)
996{
997 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
998 struct gfs2_tune *gt = &sdp->sd_tune;
Steven Whitehousecd915492006-09-04 12:49:07 -0400999 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001000 unsigned int num, den;
1001 int do_sync = 1;
1002
1003 if (!qd->qd_qb.qb_limit)
1004 return 0;
1005
Steven Whitehouse7d808232013-11-01 14:52:08 -04001006 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001007 value = qd->qd_change;
Steven Whitehouse7d808232013-11-01 14:52:08 -04001008 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001009
1010 spin_lock(&gt->gt_spin);
1011 num = gt->gt_quota_scale_num;
1012 den = gt->gt_quota_scale_den;
1013 spin_unlock(&gt->gt_spin);
1014
1015 if (value < 0)
1016 do_sync = 0;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001017 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1018 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001019 do_sync = 0;
1020 else {
1021 value *= gfs2_jindex_size(sdp) * num;
David Howells4abaca172008-07-11 14:39:56 +01001022 value = div_s64(value, den);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001023 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehousecd915492006-09-04 12:49:07 -04001024 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001025 do_sync = 0;
1026 }
1027
1028 return do_sync;
1029}
1030
1031void gfs2_quota_unlock(struct gfs2_inode *ip)
1032{
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001033 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001034 struct gfs2_quota_data *qda[4];
1035 unsigned int count = 0;
1036 unsigned int x;
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001037 int found;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001038
1039 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1040 goto out;
1041
Bob Peterson5407e242012-05-18 09:28:23 -04001042 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001043 struct gfs2_quota_data *qd;
1044 int sync;
1045
Bob Peterson5407e242012-05-18 09:28:23 -04001046 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001047 sync = need_sync(qd);
1048
Bob Peterson5407e242012-05-18 09:28:23 -04001049 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001050 if (!sync)
1051 continue;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001052
Steven Whitehouse7d808232013-11-01 14:52:08 -04001053 spin_lock(&qd_lock);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001054 found = qd_check_sync(sdp, qd, NULL);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001055 spin_unlock(&qd_lock);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001056
1057 if (!found)
1058 continue;
1059
1060 gfs2_assert_warn(sdp, qd->qd_change_sync);
1061 if (bh_get(qd)) {
1062 clear_bit(QDF_LOCKED, &qd->qd_flags);
1063 slot_put(qd);
1064 qd_put(qd);
1065 continue;
1066 }
1067
1068 qda[count++] = qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001069 }
1070
1071 if (count) {
1072 do_sync(count, qda);
1073 for (x = 0; x < count; x++)
1074 qd_unlock(qda[x]);
1075 }
1076
Steven Whitehousea91ea692006-09-04 12:04:26 -04001077out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001078 gfs2_quota_unhold(ip);
1079}
1080
1081#define MAX_LINE 256
1082
1083static int print_message(struct gfs2_quota_data *qd, char *type)
1084{
1085 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001086
Joe Perches8382e262014-03-06 12:10:46 -08001087 fs_info(sdp, "quota %s for %s %u\n",
1088 type,
Joe Perchesd77d1b52014-03-06 12:10:45 -08001089 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1090 from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001091
1092 return 0;
1093}
1094
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001095int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001096{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001097 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001098 struct gfs2_quota_data *qd;
Steven Whitehousecd915492006-09-04 12:49:07 -04001099 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001100 unsigned int x;
1101 int error = 0;
1102
1103 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1104 return 0;
1105
1106 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1107 return 0;
1108
Bob Peterson5407e242012-05-18 09:28:23 -04001109 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1110 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001111
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001112 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1113 qid_eq(qd->qd_id, make_kqid_gid(gid))))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001114 continue;
1115
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001116 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001117 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001118 value += qd->qd_change;
Steven Whitehouse7d808232013-11-01 14:52:08 -04001119 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001120
Steven Whitehousecd915492006-09-04 12:49:07 -04001121 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 +00001122 print_message(qd, "exceeded");
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001123 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001124 sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
1125
David Teiglandb3b94fa2006-01-16 16:50:04 +00001126 error = -EDQUOT;
1127 break;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001128 } else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
Steven Whitehousecd915492006-09-04 12:49:07 -04001129 (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
David Teiglandb3b94fa2006-01-16 16:50:04 +00001130 time_after_eq(jiffies, qd->qd_last_warn +
Steven Whitehouse568f4c92006-02-27 12:00:42 -05001131 gfs2_tune_get(sdp,
1132 gt_quota_warn_period) * HZ)) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001133 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001134 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001135 error = print_message(qd, "warning");
1136 qd->qd_last_warn = jiffies;
1137 }
1138 }
1139
1140 return error;
1141}
1142
Steven Whitehousecd915492006-09-04 12:49:07 -04001143void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001144 kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001145{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001146 struct gfs2_quota_data *qd;
1147 unsigned int x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001148
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001149 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001150 return;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001151 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001152 return;
1153
Bob Peterson5407e242012-05-18 09:28:23 -04001154 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1155 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001156
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001157 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1158 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001159 do_qc(qd, change);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001160 }
1161 }
1162}
1163
Jan Karaceed1722012-07-03 16:45:28 +02001164int gfs2_quota_sync(struct super_block *sb, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001165{
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001166 struct gfs2_sbd *sdp = sb->s_fs_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001167 struct gfs2_quota_data **qda;
Steven Whitehousebef292a2013-10-03 18:43:20 +01001168 unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001169 unsigned int num_qd;
1170 unsigned int x;
1171 int error = 0;
1172
David Teiglandb3b94fa2006-01-16 16:50:04 +00001173 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1174 if (!qda)
1175 return -ENOMEM;
1176
Steven Whitehousee46c7722013-10-04 12:29:34 +01001177 mutex_lock(&sdp->sd_quota_sync_mutex);
1178 sdp->sd_quota_sync_gen++;
1179
David Teiglandb3b94fa2006-01-16 16:50:04 +00001180 do {
1181 num_qd = 0;
1182
1183 for (;;) {
1184 error = qd_fish(sdp, qda + num_qd);
1185 if (error || !qda[num_qd])
1186 break;
1187 if (++num_qd == max_qd)
1188 break;
1189 }
1190
1191 if (num_qd) {
1192 if (!error)
1193 error = do_sync(num_qd, qda);
1194 if (!error)
1195 for (x = 0; x < num_qd; x++)
1196 qda[x]->qd_sync_gen =
1197 sdp->sd_quota_sync_gen;
1198
1199 for (x = 0; x < num_qd; x++)
1200 qd_unlock(qda[x]);
1201 }
1202 } while (!error && num_qd == max_qd);
1203
Steven Whitehousee46c7722013-10-04 12:29:34 +01001204 mutex_unlock(&sdp->sd_quota_sync_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001205 kfree(qda);
1206
1207 return error;
1208}
1209
Eric W. Biedermaned87dab2013-01-31 19:42:40 -08001210int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001211{
1212 struct gfs2_quota_data *qd;
1213 struct gfs2_holder q_gh;
1214 int error;
1215
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001216 error = qd_get(sdp, qid, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001217 if (error)
1218 return error;
1219
1220 error = do_glock(qd, FORCE, &q_gh);
1221 if (!error)
1222 gfs2_glock_dq_uninit(&q_gh);
1223
1224 qd_put(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001225 return error;
1226}
1227
David Teiglandb3b94fa2006-01-16 16:50:04 +00001228int gfs2_quota_init(struct gfs2_sbd *sdp)
1229{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001230 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001231 u64 size = i_size_read(sdp->sd_qc_inode);
1232 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001233 unsigned int x, slot = 0;
1234 unsigned int found = 0;
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001235 unsigned int hash;
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001236 unsigned int bm_size;
Steven Whitehousecd915492006-09-04 12:49:07 -04001237 u64 dblock;
1238 u32 extlen = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001239 int error;
1240
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001241 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001242 return -EIO;
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001243
David Teiglandb3b94fa2006-01-16 16:50:04 +00001244 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001245 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1246 bm_size *= sizeof(unsigned long);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001247 error = -ENOMEM;
Fabian Frederickfcf10d32014-02-26 19:07:56 +01001248 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001249 if (sdp->sd_quota_bitmap == NULL)
Fabian Frederickfcf10d32014-02-26 19:07:56 +01001250 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1251 __GFP_ZERO, PAGE_KERNEL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001252 if (!sdp->sd_quota_bitmap)
1253 return error;
1254
David Teiglandb3b94fa2006-01-16 16:50:04 +00001255 for (x = 0; x < blocks; x++) {
1256 struct buffer_head *bh;
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001257 const struct gfs2_quota_change *qc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001258 unsigned int y;
1259
1260 if (!extlen) {
1261 int new = 0;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001262 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001263 if (error)
1264 goto fail;
1265 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001266 error = -EIO;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001267 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1268 if (!bh)
1269 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001270 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1271 brelse(bh);
1272 goto fail;
1273 }
1274
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001275 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001276 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001277 y++, slot++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001278 struct gfs2_quota_data *qd;
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001279 s64 qc_change = be64_to_cpu(qc->qc_change);
1280 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1281 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1282 USRQUOTA : GRPQUOTA;
1283 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1284 be32_to_cpu(qc->qc_id));
1285 qc++;
1286 if (!qc_change)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001287 continue;
1288
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001289 hash = gfs2_qd_hash(sdp, qc_id);
1290 qd = qd_alloc(hash, sdp, qc_id);
1291 if (qd == NULL) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001292 brelse(bh);
1293 goto fail;
1294 }
1295
1296 set_bit(QDF_CHANGE, &qd->qd_flags);
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001297 qd->qd_change = qc_change;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001298 qd->qd_slot = slot;
1299 qd->qd_slot_count = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001300
Steven Whitehouse7d808232013-11-01 14:52:08 -04001301 spin_lock(&qd_lock);
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001302 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001303 list_add(&qd->qd_list, &sdp->sd_quota_list);
1304 atomic_inc(&sdp->sd_quota_count);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001305 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001306
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001307 spin_lock_bucket(hash);
1308 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1309 spin_unlock_bucket(hash);
1310
David Teiglandb3b94fa2006-01-16 16:50:04 +00001311 found++;
1312 }
1313
1314 brelse(bh);
1315 dblock++;
1316 extlen--;
1317 }
1318
1319 if (found)
1320 fs_info(sdp, "found %u quota changes\n", found);
1321
1322 return 0;
1323
Steven Whitehousea91ea692006-09-04 12:04:26 -04001324fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001325 gfs2_quota_cleanup(sdp);
1326 return error;
1327}
1328
David Teiglandb3b94fa2006-01-16 16:50:04 +00001329void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1330{
1331 struct list_head *head = &sdp->sd_quota_list;
1332 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001333
Steven Whitehouse7d808232013-11-01 14:52:08 -04001334 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001335 while (!list_empty(head)) {
1336 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1337
Abhijith Das0a7ab792009-01-07 16:03:37 -06001338 list_del(&qd->qd_list);
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001339
Abhijith Das0a7ab792009-01-07 16:03:37 -06001340 /* Also remove if this qd exists in the reclaim list */
Steven Whitehouse2147dbf2013-11-04 10:15:08 +00001341 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001342 atomic_dec(&sdp->sd_quota_count);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001343 spin_unlock(&qd_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001344
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001345 spin_lock_bucket(qd->qd_hash);
1346 hlist_bl_del_rcu(&qd->qd_hlist);
1347 spin_unlock_bucket(qd->qd_hash);
1348
Steven Whitehouse8ad151c2013-12-12 11:34:09 +00001349 gfs2_assert_warn(sdp, !qd->qd_change);
1350 gfs2_assert_warn(sdp, !qd->qd_slot_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001351 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1352
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001353 gfs2_glock_put(qd->qd_gl);
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001354 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001355
Steven Whitehouse7d808232013-11-01 14:52:08 -04001356 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001357 }
Steven Whitehouse7d808232013-11-01 14:52:08 -04001358 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001359
1360 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1361
1362 if (sdp->sd_quota_bitmap) {
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001363 if (is_vmalloc_addr(sdp->sd_quota_bitmap))
1364 vfree(sdp->sd_quota_bitmap);
1365 else
1366 kfree(sdp->sd_quota_bitmap);
1367 sdp->sd_quota_bitmap = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001368 }
1369}
1370
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001371static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1372{
1373 if (error == 0 || error == -EROFS)
1374 return;
1375 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1376 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1377}
1378
1379static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001380 int (*fxn)(struct super_block *sb, int type),
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001381 unsigned long t, unsigned long *timeo,
1382 unsigned int *new_timeo)
1383{
1384 if (t >= *timeo) {
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001385 int error = fxn(sdp->sd_vfs, 0);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001386 quotad_error(sdp, msg, error);
1387 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1388 } else {
1389 *timeo -= t;
1390 }
1391}
1392
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001393static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1394{
1395 struct gfs2_inode *ip;
1396
1397 while(1) {
1398 ip = NULL;
1399 spin_lock(&sdp->sd_trunc_lock);
1400 if (!list_empty(&sdp->sd_trunc_list)) {
1401 ip = list_entry(sdp->sd_trunc_list.next,
1402 struct gfs2_inode, i_trunc_list);
1403 list_del_init(&ip->i_trunc_list);
1404 }
1405 spin_unlock(&sdp->sd_trunc_lock);
1406 if (ip == NULL)
1407 return;
1408 gfs2_glock_finish_truncate(ip);
1409 }
1410}
1411
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001412void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1413 if (!sdp->sd_statfs_force_sync) {
1414 sdp->sd_statfs_force_sync = 1;
1415 wake_up(&sdp->sd_quota_wait);
1416 }
1417}
1418
1419
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001420/**
1421 * gfs2_quotad - Write cached quota changes into the quota file
1422 * @sdp: Pointer to GFS2 superblock
1423 *
1424 */
1425
1426int gfs2_quotad(void *data)
1427{
1428 struct gfs2_sbd *sdp = data;
1429 struct gfs2_tune *tune = &sdp->sd_tune;
1430 unsigned long statfs_timeo = 0;
1431 unsigned long quotad_timeo = 0;
1432 unsigned long t = 0;
1433 DEFINE_WAIT(wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001434 int empty;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001435
1436 while (!kthread_should_stop()) {
1437
1438 /* Update the master statfs file */
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001439 if (sdp->sd_statfs_force_sync) {
1440 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1441 quotad_error(sdp, "statfs", error);
1442 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1443 }
1444 else
1445 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1446 &statfs_timeo,
1447 &tune->gt_statfs_quantum);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001448
1449 /* Update quota file */
Steven Whitehouseedd2e9a2013-06-03 11:12:59 +01001450 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001451 &quotad_timeo, &tune->gt_quota_quantum);
1452
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001453 /* Check for & recover partially truncated inodes */
1454 quotad_check_trunc_list(sdp);
1455
Tejun Heoa0acae02011-11-21 12:32:22 -08001456 try_to_freeze();
1457
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001458 t = min(quotad_timeo, statfs_timeo);
1459
Steven Whitehouse7fa5d202009-03-31 15:49:08 +01001460 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001461 spin_lock(&sdp->sd_trunc_lock);
1462 empty = list_empty(&sdp->sd_trunc_list);
1463 spin_unlock(&sdp->sd_trunc_lock);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001464 if (empty && !sdp->sd_statfs_force_sync)
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001465 t -= schedule_timeout(t);
1466 else
1467 t = 0;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001468 finish_wait(&sdp->sd_quota_wait, &wait);
1469 }
1470
1471 return 0;
1472}
1473
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001474static int gfs2_quota_get_xstate(struct super_block *sb,
1475 struct fs_quota_stat *fqs)
1476{
1477 struct gfs2_sbd *sdp = sb->s_fs_info;
1478
1479 memset(fqs, 0, sizeof(struct fs_quota_stat));
1480 fqs->qs_version = FS_QSTAT_VERSION;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001481
1482 switch (sdp->sd_args.ar_quota) {
1483 case GFS2_QUOTA_ON:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001484 fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001485 /*FALLTHRU*/
1486 case GFS2_QUOTA_ACCOUNT:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001487 fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001488 break;
1489 case GFS2_QUOTA_OFF:
1490 break;
1491 }
1492
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001493 if (sdp->sd_quota_inode) {
1494 fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1495 fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
1496 }
1497 fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
1498 fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
Steven Whitehouse2147dbf2013-11-04 10:15:08 +00001499 fqs->qs_incoredqs = list_lru_count(&gfs2_qd_lru);
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001500 return 0;
1501}
1502
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001503static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001504 struct fs_disk_quota *fdq)
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001505{
1506 struct gfs2_sbd *sdp = sb->s_fs_info;
1507 struct gfs2_quota_lvb *qlvb;
1508 struct gfs2_quota_data *qd;
1509 struct gfs2_holder q_gh;
1510 int error;
1511
1512 memset(fdq, 0, sizeof(struct fs_disk_quota));
1513
1514 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1515 return -ESRCH; /* Crazy XFS error code */
1516
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001517 if ((qid.type != USRQUOTA) &&
1518 (qid.type != GRPQUOTA))
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001519 return -EINVAL;
1520
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001521 error = qd_get(sdp, qid, &qd);
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001522 if (error)
1523 return error;
1524 error = do_glock(qd, FORCE, &q_gh);
1525 if (error)
1526 goto out;
1527
David Teigland4e2f8842012-11-14 13:47:37 -05001528 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001529 fdq->d_version = FS_DQUOT_VERSION;
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001530 fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA;
Eric W. Biederman558e8522013-01-31 18:15:33 -08001531 fdq->d_id = from_kqid_munged(current_user_ns(), qid);
Abhijith Das14870b42010-11-18 11:24:24 -05001532 fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift;
1533 fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift;
1534 fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001535
1536 gfs2_glock_dq_uninit(&q_gh);
1537out:
1538 qd_put(qd);
1539 return error;
1540}
1541
Steven Whitehousee285c102009-09-23 13:50:49 +01001542/* GFS2 only supports a subset of the XFS fields */
Abhijith Das802ec9b2010-11-18 11:26:46 -05001543#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
Steven Whitehousee285c102009-09-23 13:50:49 +01001544
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001545static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001546 struct fs_disk_quota *fdq)
Steven Whitehousee285c102009-09-23 13:50:49 +01001547{
1548 struct gfs2_sbd *sdp = sb->s_fs_info;
1549 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1550 struct gfs2_quota_data *qd;
1551 struct gfs2_holder q_gh, i_gh;
1552 unsigned int data_blocks, ind_blocks;
1553 unsigned int blocks = 0;
1554 int alloc_required;
Steven Whitehousee285c102009-09-23 13:50:49 +01001555 loff_t offset;
1556 int error;
1557
1558 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1559 return -ESRCH; /* Crazy XFS error code */
1560
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001561 if ((qid.type != USRQUOTA) &&
1562 (qid.type != GRPQUOTA))
Steven Whitehousee285c102009-09-23 13:50:49 +01001563 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001564
1565 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1566 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001567
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001568 error = qd_get(sdp, qid, &qd);
Steven Whitehousee285c102009-09-23 13:50:49 +01001569 if (error)
1570 return error;
1571
Bob Peterson0a305e42012-06-06 11:17:59 +01001572 error = gfs2_rs_alloc(ip);
1573 if (error)
1574 goto out_put;
1575
Steven Whitehousee285c102009-09-23 13:50:49 +01001576 mutex_lock(&ip->i_inode.i_mutex);
1577 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1578 if (error)
Bob Peterson0a305e42012-06-06 11:17:59 +01001579 goto out_unlockput;
Steven Whitehousee285c102009-09-23 13:50:49 +01001580 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1581 if (error)
1582 goto out_q;
1583
1584 /* Check for existing entry, if none then alloc new blocks */
1585 error = update_qd(sdp, qd);
1586 if (error)
1587 goto out_i;
1588
1589 /* If nothing has changed, this is a no-op */
1590 if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
Abhijith Das14870b42010-11-18 11:24:24 -05001591 ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
Steven Whitehousee285c102009-09-23 13:50:49 +01001592 fdq->d_fieldmask ^= FS_DQ_BSOFT;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001593
Steven Whitehousee285c102009-09-23 13:50:49 +01001594 if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
Abhijith Das14870b42010-11-18 11:24:24 -05001595 ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
Steven Whitehousee285c102009-09-23 13:50:49 +01001596 fdq->d_fieldmask ^= FS_DQ_BHARD;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001597
1598 if ((fdq->d_fieldmask & FS_DQ_BCOUNT) &&
1599 ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1600 fdq->d_fieldmask ^= FS_DQ_BCOUNT;
1601
Steven Whitehousee285c102009-09-23 13:50:49 +01001602 if (fdq->d_fieldmask == 0)
1603 goto out_i;
1604
1605 offset = qd2offset(qd);
Bob Peterson461cb412010-06-24 19:21:20 -04001606 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
Abhijith Dase79a46a2011-02-07 11:22:41 -05001607 if (gfs2_is_stuffed(ip))
1608 alloc_required = 1;
Steven Whitehousee285c102009-09-23 13:50:49 +01001609 if (alloc_required) {
Steven Whitehouse7b9cff42013-10-02 11:13:25 +01001610 struct gfs2_alloc_parms ap = { .aflags = 0, };
Steven Whitehousee285c102009-09-23 13:50:49 +01001611 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1612 &data_blocks, &ind_blocks);
Bob Peterson564e12b2011-11-21 13:36:17 -05001613 blocks = 1 + data_blocks + ind_blocks;
Steven Whitehouse7b9cff42013-10-02 11:13:25 +01001614 ap.target = blocks;
1615 error = gfs2_inplace_reserve(ip, &ap);
Steven Whitehousee285c102009-09-23 13:50:49 +01001616 if (error)
Bob Peterson564e12b2011-11-21 13:36:17 -05001617 goto out_i;
Steven Whitehouse71f890f2012-07-30 14:53:19 +01001618 blocks += gfs2_rg_blocks(ip, blocks);
Steven Whitehousee285c102009-09-23 13:50:49 +01001619 }
1620
Abhijith Dase79a46a2011-02-07 11:22:41 -05001621 /* Some quotas span block boundaries and can update two blocks,
1622 adding an extra block to the transaction to handle such quotas */
1623 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001624 if (error)
1625 goto out_release;
1626
1627 /* Apply changes */
1628 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1629
1630 gfs2_trans_end(sdp);
1631out_release:
Bob Peterson564e12b2011-11-21 13:36:17 -05001632 if (alloc_required)
Steven Whitehousee285c102009-09-23 13:50:49 +01001633 gfs2_inplace_release(ip);
Steven Whitehousee285c102009-09-23 13:50:49 +01001634out_i:
1635 gfs2_glock_dq_uninit(&i_gh);
1636out_q:
1637 gfs2_glock_dq_uninit(&q_gh);
Bob Peterson0a305e42012-06-06 11:17:59 +01001638out_unlockput:
Steven Whitehousee285c102009-09-23 13:50:49 +01001639 mutex_unlock(&ip->i_inode.i_mutex);
Bob Peterson0a305e42012-06-06 11:17:59 +01001640out_put:
Steven Whitehousee285c102009-09-23 13:50:49 +01001641 qd_put(qd);
1642 return error;
1643}
1644
Steven Whitehousecc632e72009-09-15 09:59:02 +01001645const struct quotactl_ops gfs2_quotactl_ops = {
1646 .quota_sync = gfs2_quota_sync,
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001647 .get_xstate = gfs2_quota_get_xstate,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001648 .get_dqblk = gfs2_get_dqblk,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001649 .set_dqblk = gfs2_set_dqblk,
Steven Whitehousecc632e72009-09-15 09:59:02 +01001650};
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001651
1652void __init gfs2_quota_hash_init(void)
1653{
1654 unsigned i;
1655
1656 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1657 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);
1658}