blob: ce7d69a2fdc03915faf2f27b26168b35bd7527a6 [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);
Bob Peterson15562c42015-03-16 11:52:05 -0500122 sdp = qd->qd_gl->gl_name.ln_sbd;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600123
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{
Bob Peterson15562c42015-03-16 11:52:05 -0500305 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_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{
Bob Peterson15562c42015-03-16 11:52:05 -0500370 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_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;
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600391 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, 0, &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{
Bob Peterson15562c42015-03-16 11:52:05 -0500417 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000418
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{
Bob Peterson15562c42015-03-16 11:52:05 -0500489 gfs2_assert_warn(qd->qd_gl->gl_name.ln_sbd,
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500490 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
Bob Petersonb54e9a02015-10-26 10:40:28 -0500530/**
531 * gfs2_qa_alloc - make sure we have a quota allocations data structure,
532 * if necessary
533 * @ip: the inode for this reservation
534 */
535int gfs2_qa_alloc(struct gfs2_inode *ip)
536{
537 int error = 0;
538 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
539
540 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
541 return 0;
542
543 down_write(&ip->i_rw_mutex);
544 if (ip->i_qadata == NULL) {
545 ip->i_qadata = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
546 if (!ip->i_qadata)
547 error = -ENOMEM;
548 }
549 up_write(&ip->i_rw_mutex);
550 return error;
551}
552
Bob Petersona097dc7e2015-07-16 08:28:04 -0500553void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount)
Bob Petersonb54e9a02015-10-26 10:40:28 -0500554{
555 down_write(&ip->i_rw_mutex);
Bob Petersona097dc7e2015-07-16 08:28:04 -0500556 if (ip->i_qadata && ((wcount == NULL) || (atomic_read(wcount) <= 1))) {
Bob Petersonb54e9a02015-10-26 10:40:28 -0500557 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
558 ip->i_qadata = NULL;
559 }
560 up_write(&ip->i_rw_mutex);
561}
562
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800563int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000564{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400565 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Bob Peterson5407e242012-05-18 09:28:23 -0400566 struct gfs2_quota_data **qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000567 int error;
568
Bob Petersonb54e9a02015-10-26 10:40:28 -0500569 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
570 return 0;
571
572 if (ip->i_qadata == NULL) {
573 error = gfs2_rsqa_alloc(ip);
Andrew Priceaaaf68c2012-10-12 16:45:08 +0100574 if (error)
575 return error;
576 }
Bob Peterson5407e242012-05-18 09:28:23 -0400577
Bob Petersonb54e9a02015-10-26 10:40:28 -0500578 qd = ip->i_qadata->qa_qd;
Bob Peterson5407e242012-05-18 09:28:23 -0400579
Bob Petersonb54e9a02015-10-26 10:40:28 -0500580 if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
David Teiglandb3b94fa2006-01-16 16:50:04 +0000581 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
582 return -EIO;
583
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800584 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000585 if (error)
586 goto out;
Bob Petersonb54e9a02015-10-26 10:40:28 -0500587 ip->i_qadata->qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000588 qd++;
589
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800590 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000591 if (error)
592 goto out;
Bob Petersonb54e9a02015-10-26 10:40:28 -0500593 ip->i_qadata->qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 qd++;
595
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800596 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
597 !uid_eq(uid, ip->i_inode.i_uid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800598 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000599 if (error)
600 goto out;
Bob Petersonb54e9a02015-10-26 10:40:28 -0500601 ip->i_qadata->qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000602 qd++;
603 }
604
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800605 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
606 !gid_eq(gid, ip->i_inode.i_gid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800607 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000608 if (error)
609 goto out;
Bob Petersonb54e9a02015-10-26 10:40:28 -0500610 ip->i_qadata->qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000611 qd++;
612 }
613
Steven Whitehousea91ea692006-09-04 12:04:26 -0400614out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000615 if (error)
616 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000617 return error;
618}
619
620void gfs2_quota_unhold(struct gfs2_inode *ip)
621{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400622 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Bob Petersonb58bf402015-07-24 09:45:43 -0500623 u32 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000624
Bob Petersonb54e9a02015-10-26 10:40:28 -0500625 if (ip->i_qadata == NULL)
Bob Peterson5407e242012-05-18 09:28:23 -0400626 return;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000627 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
628
Bob Petersonb54e9a02015-10-26 10:40:28 -0500629 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
630 qdsb_put(ip->i_qadata->qa_qd[x]);
631 ip->i_qadata->qa_qd[x] = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000632 }
Bob Petersonb54e9a02015-10-26 10:40:28 -0500633 ip->i_qadata->qa_qd_num = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000634}
635
636static int sort_qd(const void *a, const void *b)
637{
Steven Whitehouse48fac172006-09-05 15:17:12 -0400638 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
639 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000640
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800641 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400642 return -1;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800643 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400644 return 1;
Steven Whitehouse48fac172006-09-05 15:17:12 -0400645 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000646}
647
Steven Whitehousecd915492006-09-04 12:49:07 -0400648static void do_qc(struct gfs2_quota_data *qd, s64 change)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000649{
Bob Peterson15562c42015-03-16 11:52:05 -0500650 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400651 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000652 struct gfs2_quota_change *qc = qd->qd_bh_qc;
Steven Whitehousecd915492006-09-04 12:49:07 -0400653 s64 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000654
Steven Whitehousef55ab262006-02-21 12:51:39 +0000655 mutex_lock(&sdp->sd_quota_mutex);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000656 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000657
658 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
659 qc->qc_change = 0;
660 qc->qc_flags = 0;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800661 if (qd->qd_id.type == USRQUOTA)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000662 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800663 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000664 }
665
Al Virob44b84d2006-10-14 10:46:30 -0400666 x = be64_to_cpu(qc->qc_change) + change;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000667 qc->qc_change = cpu_to_be64(x);
668
Steven Whitehouse7d808232013-11-01 14:52:08 -0400669 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000670 qd->qd_change = x;
Steven Whitehouse7d808232013-11-01 14:52:08 -0400671 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000672
673 if (!x) {
674 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
675 clear_bit(QDF_CHANGE, &qd->qd_flags);
676 qc->qc_flags = 0;
677 qc->qc_id = 0;
678 slot_put(qd);
679 qd_put(qd);
680 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
681 qd_hold(qd);
682 slot_hold(qd);
683 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400684
Abhi Das9cde2892015-06-02 11:03:04 -0500685 if (change < 0) /* Reset quiet flag if we freed some blocks */
686 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
Steven Whitehousef55ab262006-02-21 12:51:39 +0000687 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000688}
689
Abhi Das39a72582015-06-02 11:02:24 -0500690static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index,
691 unsigned off, void *buf, unsigned bytes)
692{
693 struct inode *inode = &ip->i_inode;
694 struct gfs2_sbd *sdp = GFS2_SB(inode);
695 struct address_space *mapping = inode->i_mapping;
696 struct page *page;
697 struct buffer_head *bh;
698 void *kaddr;
699 u64 blk;
700 unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
701 unsigned to_write = bytes, pg_off = off;
702 int done = 0;
703
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300704 blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
Abhi Das39a72582015-06-02 11:02:24 -0500705 boff = off % bsize;
706
707 page = find_or_create_page(mapping, index, GFP_NOFS);
708 if (!page)
709 return -ENOMEM;
710 if (!page_has_buffers(page))
711 create_empty_buffers(page, bsize, 0);
712
713 bh = page_buffers(page);
714 while (!done) {
715 /* Find the beginning block within the page */
716 if (pg_off >= ((bnum * bsize) + bsize)) {
717 bh = bh->b_this_page;
718 bnum++;
719 blk++;
720 continue;
721 }
722 if (!buffer_mapped(bh)) {
723 gfs2_block_map(inode, blk, bh, 1);
724 if (!buffer_mapped(bh))
725 goto unlock_out;
726 /* If it's a newly allocated disk block, zero it */
727 if (buffer_new(bh))
728 zero_user(page, bnum * bsize, bh->b_size);
729 }
730 if (PageUptodate(page))
731 set_buffer_uptodate(bh);
732 if (!buffer_uptodate(bh)) {
733 ll_rw_block(READ | REQ_META, 1, &bh);
734 wait_on_buffer(bh);
735 if (!buffer_uptodate(bh))
736 goto unlock_out;
737 }
738 gfs2_trans_add_data(ip->i_gl, bh);
739
740 /* If we need to write to the next block as well */
741 if (to_write > (bsize - boff)) {
742 pg_off += (bsize - boff);
743 to_write -= (bsize - boff);
744 boff = pg_off % bsize;
745 continue;
746 }
747 done = 1;
748 }
749
750 /* Write to the page, now that we have setup the buffer(s) */
751 kaddr = kmap_atomic(page);
752 memcpy(kaddr + off, buf, bytes);
753 flush_dcache_page(page);
754 kunmap_atomic(kaddr);
755 unlock_page(page);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300756 put_page(page);
Abhi Das39a72582015-06-02 11:02:24 -0500757
758 return 0;
759
760unlock_out:
761 unlock_page(page);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300762 put_page(page);
Abhi Das39a72582015-06-02 11:02:24 -0500763 return -EIO;
764}
765
766static int gfs2_write_disk_quota(struct gfs2_inode *ip, struct gfs2_quota *qp,
767 loff_t loc)
768{
769 unsigned long pg_beg;
770 unsigned pg_off, nbytes, overflow = 0;
771 int pg_oflow = 0, error;
772 void *ptr;
773
774 nbytes = sizeof(struct gfs2_quota);
775
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300776 pg_beg = loc >> PAGE_SHIFT;
777 pg_off = loc % PAGE_SIZE;
Abhi Das39a72582015-06-02 11:02:24 -0500778
779 /* If the quota straddles a page boundary, split the write in two */
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300780 if ((pg_off + nbytes) > PAGE_SIZE) {
Abhi Das39a72582015-06-02 11:02:24 -0500781 pg_oflow = 1;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300782 overflow = (pg_off + nbytes) - PAGE_SIZE;
Abhi Das39a72582015-06-02 11:02:24 -0500783 }
784
785 ptr = qp;
786 error = gfs2_write_buf_to_page(ip, pg_beg, pg_off, ptr,
787 nbytes - overflow);
788 /* If there's an overflow, write the remaining bytes to the next page */
789 if (!error && pg_oflow)
790 error = gfs2_write_buf_to_page(ip, pg_beg + 1, 0,
791 ptr + nbytes - overflow,
792 overflow);
793 return error;
794}
795
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000796/**
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100797 * gfs2_adjust_quota - adjust record of current block usage
798 * @ip: The quota inode
799 * @loc: Offset of the entry in the quota file
Steven Whitehousee285c102009-09-23 13:50:49 +0100800 * @change: The amount of usage change to record
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100801 * @qd: The quota data
Steven Whitehousee285c102009-09-23 13:50:49 +0100802 * @fdq: The updated limits to record
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000803 *
804 * This function was mostly borrowed from gfs2_block_truncate_page which was
805 * in turn mostly borrowed from ext3
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100806 *
807 * Returns: 0 or -ve on error
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000808 */
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100809
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000810static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
Steven Whitehousee285c102009-09-23 13:50:49 +0100811 s64 change, struct gfs2_quota_data *qd,
Jan Kara14bf61f2014-10-09 16:03:13 +0200812 struct qc_dqblk *fdq)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000813{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400814 struct inode *inode = &ip->i_inode;
Abhijith Das14870b42010-11-18 11:24:24 -0500815 struct gfs2_sbd *sdp = GFS2_SB(inode);
Al Viro951b4bd2013-06-02 19:53:40 -0400816 struct gfs2_quota q;
Abhi Das39a72582015-06-02 11:02:24 -0500817 int err;
Steven Whitehousee285c102009-09-23 13:50:49 +0100818 u64 size;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000819
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100820 if (gfs2_is_stuffed(ip)) {
821 err = gfs2_unstuff_dinode(ip, NULL);
822 if (err)
823 return err;
824 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400825
826 memset(&q, 0, sizeof(struct gfs2_quota));
Andrew Price43066292012-04-16 16:40:55 +0100827 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
Abhijith Das7e619bc2010-05-07 17:50:18 -0400828 if (err < 0)
829 return err;
830
Abhi Das39a72582015-06-02 11:02:24 -0500831 loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
Abhijith Das7e619bc2010-05-07 17:50:18 -0400832 err = -EIO;
Al Viro951b4bd2013-06-02 19:53:40 -0400833 be64_add_cpu(&q.qu_value, change);
Abhi Das1bdf4532015-06-08 11:20:50 -0500834 if (((s64)be64_to_cpu(q.qu_value)) < 0)
Abhi Das39a72582015-06-02 11:02:24 -0500835 q.qu_value = 0; /* Never go negative on quota usage */
Al Viro951b4bd2013-06-02 19:53:40 -0400836 qd->qd_qb.qb_value = q.qu_value;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400837 if (fdq) {
Jan Kara14bf61f2014-10-09 16:03:13 +0200838 if (fdq->d_fieldmask & QC_SPC_SOFT) {
839 q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
Al Viro951b4bd2013-06-02 19:53:40 -0400840 qd->qd_qb.qb_warn = q.qu_warn;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400841 }
Jan Kara14bf61f2014-10-09 16:03:13 +0200842 if (fdq->d_fieldmask & QC_SPC_HARD) {
843 q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
Al Viro951b4bd2013-06-02 19:53:40 -0400844 qd->qd_qb.qb_limit = q.qu_limit;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400845 }
Jan Kara14bf61f2014-10-09 16:03:13 +0200846 if (fdq->d_fieldmask & QC_SPACE) {
847 q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
Al Viro951b4bd2013-06-02 19:53:40 -0400848 qd->qd_qb.qb_value = q.qu_value;
Abhijith Das802ec9b2010-11-18 11:26:46 -0500849 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400850 }
851
Abhi Das39a72582015-06-02 11:02:24 -0500852 err = gfs2_write_disk_quota(ip, &q, loc);
853 if (!err) {
854 size = loc + sizeof(struct gfs2_quota);
855 if (size > inode->i_size)
856 i_size_write(inode, size);
857 inode->i_mtime = inode->i_atime = CURRENT_TIME;
858 mark_inode_dirty(inode);
859 set_bit(QDF_REFRESH, &qd->qd_flags);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000860 }
861
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000862 return err;
863}
864
David Teiglandb3b94fa2006-01-16 16:50:04 +0000865static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
866{
Bob Peterson15562c42015-03-16 11:52:05 -0500867 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_name.ln_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400868 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100869 struct gfs2_alloc_parms ap = { .aflags = 0, };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000870 unsigned int data_blocks, ind_blocks;
871 struct gfs2_holder *ghs, i_gh;
872 unsigned int qx, x;
873 struct gfs2_quota_data *qd;
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100874 unsigned reserved;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000875 loff_t offset;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600876 unsigned int nalloc = 0, blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000877 int error;
878
Bob Petersonb54e9a02015-10-26 10:40:28 -0500879 error = gfs2_rsqa_alloc(ip);
Bob Peterson0a305e42012-06-06 11:17:59 +0100880 if (error)
881 return error;
882
David Teiglandb3b94fa2006-01-16 16:50:04 +0000883 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
884 &data_blocks, &ind_blocks);
885
Josef Bacik16c5f062008-04-09 09:33:41 -0400886 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000887 if (!ghs)
888 return -ENOMEM;
889
890 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
Al Viro59551022016-01-22 15:40:57 -0500891 inode_lock(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000892 for (qx = 0; qx < num_qd; qx++) {
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100893 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894 GL_NOCACHE, &ghs[qx]);
895 if (error)
896 goto out;
897 }
898
899 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
900 if (error)
901 goto out;
902
903 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000904 offset = qd2offset(qda[x]);
Bob Peterson461cb412010-06-24 19:21:20 -0400905 if (gfs2_write_alloc_required(ip, offset,
906 sizeof(struct gfs2_quota)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000907 nalloc++;
908 }
909
Abhijith Das20b95bf2008-03-06 17:43:52 -0600910 /*
911 * 1 blk for unstuffing inode if stuffed. We add this extra
912 * block to the reservation unconditionally. If the inode
913 * doesn't need unstuffing, the block will be released to the
914 * rgrp since it won't be allocated during the transaction
915 */
Abhijith Das7e619bc2010-05-07 17:50:18 -0400916 /* +3 in the end for unstuffing block, inode size update block
917 * and another block in case quota straddles page boundary and
918 * two blocks need to be updated instead of 1 */
919 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600920
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100921 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100922 ap.target = reserved;
923 error = gfs2_inplace_reserve(ip, &ap);
Abhijith Das20b95bf2008-03-06 17:43:52 -0600924 if (error)
925 goto out_alloc;
926
927 if (nalloc)
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100928 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600929
930 error = gfs2_trans_begin(sdp, blocks, 0);
931 if (error)
932 goto out_ipres;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000933
934 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000935 qd = qda[x];
936 offset = qd2offset(qd);
Steven Whitehousee285c102009-09-23 13:50:49 +0100937 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000938 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000939 goto out_end_trans;
940
David Teiglandb3b94fa2006-01-16 16:50:04 +0000941 do_qc(qd, -qd->qd_change_sync);
Abhijith Das662e3a52011-03-08 10:40:42 -0500942 set_bit(QDF_REFRESH, &qd->qd_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000943 }
944
945 error = 0;
946
Steven Whitehousea91ea692006-09-04 12:04:26 -0400947out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000948 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400949out_ipres:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600950 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400951out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000952 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400953out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000954 while (qx--)
955 gfs2_glock_dq_uninit(&ghs[qx]);
Al Viro59551022016-01-22 15:40:57 -0500956 inode_unlock(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000957 kfree(ghs);
Bob Peterson15562c42015-03-16 11:52:05 -0500958 gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl, NORMAL_FLUSH);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000959 return error;
960}
961
Steven Whitehousee285c102009-09-23 13:50:49 +0100962static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
963{
964 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
965 struct gfs2_quota q;
966 struct gfs2_quota_lvb *qlvb;
967 loff_t pos;
968 int error;
969
970 memset(&q, 0, sizeof(struct gfs2_quota));
971 pos = qd2offset(qd);
Andrew Price43066292012-04-16 16:40:55 +0100972 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
Steven Whitehousee285c102009-09-23 13:50:49 +0100973 if (error < 0)
974 return error;
975
David Teigland4e2f8842012-11-14 13:47:37 -0500976 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehousee285c102009-09-23 13:50:49 +0100977 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
978 qlvb->__pad = 0;
979 qlvb->qb_limit = q.qu_limit;
980 qlvb->qb_warn = q.qu_warn;
981 qlvb->qb_value = q.qu_value;
982 qd->qd_qb = *qlvb;
983
984 return 0;
985}
986
David Teiglandb3b94fa2006-01-16 16:50:04 +0000987static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
988 struct gfs2_holder *q_gh)
989{
Bob Peterson15562c42015-03-16 11:52:05 -0500990 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400991 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000992 struct gfs2_holder i_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000993 int error;
994
Steven Whitehousea91ea692006-09-04 12:04:26 -0400995restart:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000996 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
997 if (error)
998 return error;
999
Abhi Das30133172015-04-08 09:03:56 -05001000 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1001 force_refresh = FORCE;
1002
David Teigland4e2f8842012-11-14 13:47:37 -05001003 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001004
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001005 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001006 gfs2_glock_dq_uninit(q_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +01001007 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1008 GL_NOCACHE, q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001009 if (error)
1010 return error;
1011
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001012 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001013 if (error)
1014 goto fail;
1015
Steven Whitehousee285c102009-09-23 13:50:49 +01001016 error = update_qd(sdp, qd);
1017 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001018 goto fail_gunlock;
Steven Whitehousee285c102009-09-23 13:50:49 +01001019
David Teiglandb3b94fa2006-01-16 16:50:04 +00001020 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +01001021 gfs2_glock_dq_uninit(q_gh);
1022 force_refresh = 0;
1023 goto restart;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001024 }
1025
1026 return 0;
1027
Steven Whitehousea91ea692006-09-04 12:04:26 -04001028fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001029 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001030fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001031 gfs2_glock_dq_uninit(q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001032 return error;
1033}
1034
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001035int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001036{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001037 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Abhijith Das662e3a52011-03-08 10:40:42 -05001038 struct gfs2_quota_data *qd;
Bob Petersonb58bf402015-07-24 09:45:43 -05001039 u32 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001040 int error = 0;
1041
David Teiglandb3b94fa2006-01-16 16:50:04 +00001042 if (capable(CAP_SYS_RESOURCE) ||
1043 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1044 return 0;
1045
Bob Petersonb54e9a02015-10-26 10:40:28 -05001046 error = gfs2_quota_hold(ip, uid, gid);
1047 if (error)
1048 return error;
1049
1050 sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
Bob Peterson5407e242012-05-18 09:28:23 -04001051 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001052
Bob Petersonb54e9a02015-10-26 10:40:28 -05001053 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1054 qd = ip->i_qadata->qa_qd[x];
1055 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001056 if (error)
1057 break;
1058 }
1059
1060 if (!error)
1061 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1062 else {
1063 while (x--)
Bob Petersonb54e9a02015-10-26 10:40:28 -05001064 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001065 gfs2_quota_unhold(ip);
1066 }
1067
1068 return error;
1069}
1070
1071static int need_sync(struct gfs2_quota_data *qd)
1072{
Bob Peterson15562c42015-03-16 11:52:05 -05001073 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001074 struct gfs2_tune *gt = &sdp->sd_tune;
Steven Whitehousecd915492006-09-04 12:49:07 -04001075 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001076 unsigned int num, den;
1077 int do_sync = 1;
1078
1079 if (!qd->qd_qb.qb_limit)
1080 return 0;
1081
Steven Whitehouse7d808232013-11-01 14:52:08 -04001082 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001083 value = qd->qd_change;
Steven Whitehouse7d808232013-11-01 14:52:08 -04001084 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001085
1086 spin_lock(&gt->gt_spin);
1087 num = gt->gt_quota_scale_num;
1088 den = gt->gt_quota_scale_den;
1089 spin_unlock(&gt->gt_spin);
1090
1091 if (value < 0)
1092 do_sync = 0;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001093 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
1094 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001095 do_sync = 0;
1096 else {
1097 value *= gfs2_jindex_size(sdp) * num;
David Howells4abaca172008-07-11 14:39:56 +01001098 value = div_s64(value, den);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001099 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehousecd915492006-09-04 12:49:07 -04001100 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001101 do_sync = 0;
1102 }
1103
1104 return do_sync;
1105}
1106
1107void gfs2_quota_unlock(struct gfs2_inode *ip)
1108{
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001109 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001110 struct gfs2_quota_data *qda[4];
1111 unsigned int count = 0;
Bob Petersonb58bf402015-07-24 09:45:43 -05001112 u32 x;
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001113 int found;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001114
1115 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1116 goto out;
1117
Bob Petersonb54e9a02015-10-26 10:40:28 -05001118 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001119 struct gfs2_quota_data *qd;
1120 int sync;
1121
Bob Petersonb54e9a02015-10-26 10:40:28 -05001122 qd = ip->i_qadata->qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001123 sync = need_sync(qd);
1124
Bob Petersonb54e9a02015-10-26 10:40:28 -05001125 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001126 if (!sync)
1127 continue;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001128
Steven Whitehouse7d808232013-11-01 14:52:08 -04001129 spin_lock(&qd_lock);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001130 found = qd_check_sync(sdp, qd, NULL);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001131 spin_unlock(&qd_lock);
Steven Whitehouseaabd7c72013-10-04 11:31:05 +01001132
1133 if (!found)
1134 continue;
1135
1136 gfs2_assert_warn(sdp, qd->qd_change_sync);
1137 if (bh_get(qd)) {
1138 clear_bit(QDF_LOCKED, &qd->qd_flags);
1139 slot_put(qd);
1140 qd_put(qd);
1141 continue;
1142 }
1143
1144 qda[count++] = qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001145 }
1146
1147 if (count) {
1148 do_sync(count, qda);
1149 for (x = 0; x < count; x++)
1150 qd_unlock(qda[x]);
1151 }
1152
Steven Whitehousea91ea692006-09-04 12:04:26 -04001153out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001154 gfs2_quota_unhold(ip);
1155}
1156
1157#define MAX_LINE 256
1158
1159static int print_message(struct gfs2_quota_data *qd, char *type)
1160{
Bob Peterson15562c42015-03-16 11:52:05 -05001161 struct gfs2_sbd *sdp = qd->qd_gl->gl_name.ln_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001162
Joe Perches8382e262014-03-06 12:10:46 -08001163 fs_info(sdp, "quota %s for %s %u\n",
1164 type,
Joe Perchesd77d1b52014-03-06 12:10:45 -08001165 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1166 from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001167
1168 return 0;
1169}
1170
Abhi Das25435e52015-03-18 12:04:37 -05001171/**
1172 * gfs2_quota_check - check if allocating new blocks will exceed quota
1173 * @ip: The inode for which this check is being performed
1174 * @uid: The uid to check against
1175 * @gid: The gid to check against
1176 * @ap: The allocation parameters. ap->target contains the requested
1177 * blocks. ap->min_target, if set, contains the minimum blks
1178 * requested.
1179 *
1180 * Returns: 0 on success.
1181 * min_req = ap->min_target ? ap->min_target : ap->target;
1182 * quota must allow atleast min_req blks for success and
1183 * ap->allowed is set to the number of blocks allowed
1184 *
1185 * -EDQUOT otherwise, quota violation. ap->allowed is set to number
1186 * of blocks available.
1187 */
Abhi Dasb8fbf472015-03-18 12:03:41 -05001188int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1189 struct gfs2_alloc_parms *ap)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001190{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001191 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001192 struct gfs2_quota_data *qd;
Abhi Das25435e52015-03-18 12:04:37 -05001193 s64 value, warn, limit;
Bob Petersonb58bf402015-07-24 09:45:43 -05001194 u32 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001195 int error = 0;
1196
Abhi Das25435e52015-03-18 12:04:37 -05001197 ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
David Teiglandb3b94fa2006-01-16 16:50:04 +00001198 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1199 return 0;
1200
1201 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1202 return 0;
1203
Bob Petersonb54e9a02015-10-26 10:40:28 -05001204 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1205 qd = ip->i_qadata->qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001206
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001207 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1208 qid_eq(qd->qd_id, make_kqid_gid(gid))))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001209 continue;
1210
Abhi Das25435e52015-03-18 12:04:37 -05001211 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1212 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001213 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001214 spin_lock(&qd_lock);
Abhi Das25435e52015-03-18 12:04:37 -05001215 value += qd->qd_change;
Steven Whitehouse7d808232013-11-01 14:52:08 -04001216 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001217
Abhi Das25435e52015-03-18 12:04:37 -05001218 if (limit > 0 && (limit - value) < ap->allowed)
1219 ap->allowed = limit - value;
1220 /* If we can't meet the target */
1221 if (limit && limit < (value + (s64)ap->target)) {
1222 /* If no min_target specified or we don't meet
1223 * min_target, return -EDQUOT */
1224 if (!ap->min_target || ap->min_target > ap->allowed) {
Abhi Das9cde2892015-06-02 11:03:04 -05001225 if (!test_and_set_bit(QDF_QMSG_QUIET,
1226 &qd->qd_flags)) {
1227 print_message(qd, "exceeded");
1228 quota_send_warning(qd->qd_id,
1229 sdp->sd_vfs->s_dev,
1230 QUOTA_NL_BHARDWARN);
1231 }
Abhi Das25435e52015-03-18 12:04:37 -05001232 error = -EDQUOT;
1233 break;
1234 }
1235 } else if (warn && warn < value &&
David Teiglandb3b94fa2006-01-16 16:50:04 +00001236 time_after_eq(jiffies, qd->qd_last_warn +
Abhi Das25435e52015-03-18 12:04:37 -05001237 gfs2_tune_get(sdp, gt_quota_warn_period)
1238 * HZ)) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001239 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001240 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001241 error = print_message(qd, "warning");
1242 qd->qd_last_warn = jiffies;
1243 }
1244 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001245 return error;
1246}
1247
Steven Whitehousecd915492006-09-04 12:49:07 -04001248void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001249 kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001250{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001251 struct gfs2_quota_data *qd;
Bob Petersonb58bf402015-07-24 09:45:43 -05001252 u32 x;
Bob Petersonb54e9a02015-10-26 10:40:28 -05001253 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001254
Bob Petersonb54e9a02015-10-26 10:40:28 -05001255 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON ||
1256 gfs2_assert_warn(sdp, change))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001257 return;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001258 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001259 return;
1260
Bob Petersonb54e9a02015-10-26 10:40:28 -05001261 for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1262 qd = ip->i_qadata->qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001263
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001264 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1265 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001266 do_qc(qd, change);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001267 }
1268 }
1269}
1270
Jan Karaceed1722012-07-03 16:45:28 +02001271int gfs2_quota_sync(struct super_block *sb, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001272{
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001273 struct gfs2_sbd *sdp = sb->s_fs_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001274 struct gfs2_quota_data **qda;
Steven Whitehousebef292a2013-10-03 18:43:20 +01001275 unsigned int max_qd = PAGE_SIZE/sizeof(struct gfs2_holder);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001276 unsigned int num_qd;
1277 unsigned int x;
1278 int error = 0;
1279
David Teiglandb3b94fa2006-01-16 16:50:04 +00001280 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1281 if (!qda)
1282 return -ENOMEM;
1283
Steven Whitehousee46c7722013-10-04 12:29:34 +01001284 mutex_lock(&sdp->sd_quota_sync_mutex);
1285 sdp->sd_quota_sync_gen++;
1286
David Teiglandb3b94fa2006-01-16 16:50:04 +00001287 do {
1288 num_qd = 0;
1289
1290 for (;;) {
1291 error = qd_fish(sdp, qda + num_qd);
1292 if (error || !qda[num_qd])
1293 break;
1294 if (++num_qd == max_qd)
1295 break;
1296 }
1297
1298 if (num_qd) {
1299 if (!error)
1300 error = do_sync(num_qd, qda);
1301 if (!error)
1302 for (x = 0; x < num_qd; x++)
1303 qda[x]->qd_sync_gen =
1304 sdp->sd_quota_sync_gen;
1305
1306 for (x = 0; x < num_qd; x++)
1307 qd_unlock(qda[x]);
1308 }
1309 } while (!error && num_qd == max_qd);
1310
Steven Whitehousee46c7722013-10-04 12:29:34 +01001311 mutex_unlock(&sdp->sd_quota_sync_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001312 kfree(qda);
1313
1314 return error;
1315}
1316
Eric W. Biedermaned87dab2013-01-31 19:42:40 -08001317int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001318{
1319 struct gfs2_quota_data *qd;
1320 struct gfs2_holder q_gh;
1321 int error;
1322
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001323 error = qd_get(sdp, qid, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001324 if (error)
1325 return error;
1326
1327 error = do_glock(qd, FORCE, &q_gh);
1328 if (!error)
1329 gfs2_glock_dq_uninit(&q_gh);
1330
1331 qd_put(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001332 return error;
1333}
1334
David Teiglandb3b94fa2006-01-16 16:50:04 +00001335int gfs2_quota_init(struct gfs2_sbd *sdp)
1336{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001337 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001338 u64 size = i_size_read(sdp->sd_qc_inode);
1339 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001340 unsigned int x, slot = 0;
1341 unsigned int found = 0;
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001342 unsigned int hash;
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001343 unsigned int bm_size;
Steven Whitehousecd915492006-09-04 12:49:07 -04001344 u64 dblock;
1345 u32 extlen = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001346 int error;
1347
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001348 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001349 return -EIO;
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001350
David Teiglandb3b94fa2006-01-16 16:50:04 +00001351 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001352 bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1353 bm_size *= sizeof(unsigned long);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001354 error = -ENOMEM;
Fabian Frederickfcf10d32014-02-26 19:07:56 +01001355 sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001356 if (sdp->sd_quota_bitmap == NULL)
Fabian Frederickfcf10d32014-02-26 19:07:56 +01001357 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1358 __GFP_ZERO, PAGE_KERNEL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001359 if (!sdp->sd_quota_bitmap)
1360 return error;
1361
David Teiglandb3b94fa2006-01-16 16:50:04 +00001362 for (x = 0; x < blocks; x++) {
1363 struct buffer_head *bh;
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001364 const struct gfs2_quota_change *qc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001365 unsigned int y;
1366
1367 if (!extlen) {
1368 int new = 0;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001369 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001370 if (error)
1371 goto fail;
1372 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001373 error = -EIO;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001374 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1375 if (!bh)
1376 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001377 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1378 brelse(bh);
1379 goto fail;
1380 }
1381
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001382 qc = (const struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001383 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001384 y++, slot++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001385 struct gfs2_quota_data *qd;
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001386 s64 qc_change = be64_to_cpu(qc->qc_change);
1387 u32 qc_flags = be32_to_cpu(qc->qc_flags);
1388 enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1389 USRQUOTA : GRPQUOTA;
1390 struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1391 be32_to_cpu(qc->qc_id));
1392 qc++;
1393 if (!qc_change)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001394 continue;
1395
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001396 hash = gfs2_qd_hash(sdp, qc_id);
1397 qd = qd_alloc(hash, sdp, qc_id);
1398 if (qd == NULL) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001399 brelse(bh);
1400 goto fail;
1401 }
1402
1403 set_bit(QDF_CHANGE, &qd->qd_flags);
Steven Whitehouse7aed98f2013-11-26 15:17:09 +00001404 qd->qd_change = qc_change;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001405 qd->qd_slot = slot;
1406 qd->qd_slot_count = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001407
Steven Whitehouse7d808232013-11-01 14:52:08 -04001408 spin_lock(&qd_lock);
Steven Whitehouseee2411a2013-12-12 17:29:32 +00001409 BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001410 list_add(&qd->qd_list, &sdp->sd_quota_list);
1411 atomic_inc(&sdp->sd_quota_count);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001412 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001413
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001414 spin_lock_bucket(hash);
1415 hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1416 spin_unlock_bucket(hash);
1417
David Teiglandb3b94fa2006-01-16 16:50:04 +00001418 found++;
1419 }
1420
1421 brelse(bh);
1422 dblock++;
1423 extlen--;
1424 }
1425
1426 if (found)
1427 fs_info(sdp, "found %u quota changes\n", found);
1428
1429 return 0;
1430
Steven Whitehousea91ea692006-09-04 12:04:26 -04001431fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001432 gfs2_quota_cleanup(sdp);
1433 return error;
1434}
1435
David Teiglandb3b94fa2006-01-16 16:50:04 +00001436void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1437{
1438 struct list_head *head = &sdp->sd_quota_list;
1439 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001440
Steven Whitehouse7d808232013-11-01 14:52:08 -04001441 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001442 while (!list_empty(head)) {
1443 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1444
Abhijith Das0a7ab792009-01-07 16:03:37 -06001445 list_del(&qd->qd_list);
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001446
Abhijith Das0a7ab792009-01-07 16:03:37 -06001447 /* Also remove if this qd exists in the reclaim list */
Steven Whitehouse2147dbf2013-11-04 10:15:08 +00001448 list_lru_del(&gfs2_qd_lru, &qd->qd_lru);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001449 atomic_dec(&sdp->sd_quota_count);
Steven Whitehouse7d808232013-11-01 14:52:08 -04001450 spin_unlock(&qd_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001451
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001452 spin_lock_bucket(qd->qd_hash);
1453 hlist_bl_del_rcu(&qd->qd_hlist);
1454 spin_unlock_bucket(qd->qd_hash);
1455
Steven Whitehouse8ad151c2013-12-12 11:34:09 +00001456 gfs2_assert_warn(sdp, !qd->qd_change);
1457 gfs2_assert_warn(sdp, !qd->qd_slot_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001458 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1459
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001460 gfs2_glock_put(qd->qd_gl);
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001461 call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001462
Steven Whitehouse7d808232013-11-01 14:52:08 -04001463 spin_lock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001464 }
Steven Whitehouse7d808232013-11-01 14:52:08 -04001465 spin_unlock(&qd_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001466
1467 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1468
Al Viro3cdcf632014-11-20 05:18:38 +00001469 kvfree(sdp->sd_quota_bitmap);
1470 sdp->sd_quota_bitmap = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001471}
1472
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001473static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1474{
1475 if (error == 0 || error == -EROFS)
1476 return;
1477 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1478 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1479}
1480
1481static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001482 int (*fxn)(struct super_block *sb, int type),
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001483 unsigned long t, unsigned long *timeo,
1484 unsigned int *new_timeo)
1485{
1486 if (t >= *timeo) {
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001487 int error = fxn(sdp->sd_vfs, 0);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001488 quotad_error(sdp, msg, error);
1489 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1490 } else {
1491 *timeo -= t;
1492 }
1493}
1494
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001495static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1496{
1497 struct gfs2_inode *ip;
1498
1499 while(1) {
1500 ip = NULL;
1501 spin_lock(&sdp->sd_trunc_lock);
1502 if (!list_empty(&sdp->sd_trunc_list)) {
1503 ip = list_entry(sdp->sd_trunc_list.next,
1504 struct gfs2_inode, i_trunc_list);
1505 list_del_init(&ip->i_trunc_list);
1506 }
1507 spin_unlock(&sdp->sd_trunc_lock);
1508 if (ip == NULL)
1509 return;
1510 gfs2_glock_finish_truncate(ip);
1511 }
1512}
1513
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001514void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1515 if (!sdp->sd_statfs_force_sync) {
1516 sdp->sd_statfs_force_sync = 1;
1517 wake_up(&sdp->sd_quota_wait);
1518 }
1519}
1520
1521
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001522/**
1523 * gfs2_quotad - Write cached quota changes into the quota file
1524 * @sdp: Pointer to GFS2 superblock
1525 *
1526 */
1527
1528int gfs2_quotad(void *data)
1529{
1530 struct gfs2_sbd *sdp = data;
1531 struct gfs2_tune *tune = &sdp->sd_tune;
1532 unsigned long statfs_timeo = 0;
1533 unsigned long quotad_timeo = 0;
1534 unsigned long t = 0;
1535 DEFINE_WAIT(wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001536 int empty;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001537
1538 while (!kthread_should_stop()) {
1539
1540 /* Update the master statfs file */
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001541 if (sdp->sd_statfs_force_sync) {
1542 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1543 quotad_error(sdp, "statfs", error);
1544 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1545 }
1546 else
1547 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1548 &statfs_timeo,
1549 &tune->gt_statfs_quantum);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001550
1551 /* Update quota file */
Steven Whitehouseedd2e9a2013-06-03 11:12:59 +01001552 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001553 &quotad_timeo, &tune->gt_quota_quantum);
1554
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001555 /* Check for & recover partially truncated inodes */
1556 quotad_check_trunc_list(sdp);
1557
Tejun Heoa0acae02011-11-21 12:32:22 -08001558 try_to_freeze();
1559
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001560 t = min(quotad_timeo, statfs_timeo);
1561
Steven Whitehouse7fa5d202009-03-31 15:49:08 +01001562 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001563 spin_lock(&sdp->sd_trunc_lock);
1564 empty = list_empty(&sdp->sd_trunc_list);
1565 spin_unlock(&sdp->sd_trunc_lock);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001566 if (empty && !sdp->sd_statfs_force_sync)
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001567 t -= schedule_timeout(t);
1568 else
1569 t = 0;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001570 finish_wait(&sdp->sd_quota_wait, &wait);
1571 }
1572
1573 return 0;
1574}
1575
Jan Karae54b2e22014-11-19 16:41:07 +01001576static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001577{
1578 struct gfs2_sbd *sdp = sb->s_fs_info;
1579
Jan Karae54b2e22014-11-19 16:41:07 +01001580 memset(state, 0, sizeof(*state));
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001581
1582 switch (sdp->sd_args.ar_quota) {
1583 case GFS2_QUOTA_ON:
Jan Karae54b2e22014-11-19 16:41:07 +01001584 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1585 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001586 /*FALLTHRU*/
1587 case GFS2_QUOTA_ACCOUNT:
Jan Karae54b2e22014-11-19 16:41:07 +01001588 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1589 QCI_SYSFILE;
1590 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1591 QCI_SYSFILE;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001592 break;
1593 case GFS2_QUOTA_OFF:
1594 break;
1595 }
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001596 if (sdp->sd_quota_inode) {
Jan Karae54b2e22014-11-19 16:41:07 +01001597 state->s_state[USRQUOTA].ino =
1598 GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1599 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001600 }
Jan Karae54b2e22014-11-19 16:41:07 +01001601 state->s_state[USRQUOTA].nextents = 1; /* unsupported */
1602 state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1603 state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001604 return 0;
1605}
1606
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001607static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
Jan Kara14bf61f2014-10-09 16:03:13 +02001608 struct qc_dqblk *fdq)
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001609{
1610 struct gfs2_sbd *sdp = sb->s_fs_info;
1611 struct gfs2_quota_lvb *qlvb;
1612 struct gfs2_quota_data *qd;
1613 struct gfs2_holder q_gh;
1614 int error;
1615
Jan Kara14bf61f2014-10-09 16:03:13 +02001616 memset(fdq, 0, sizeof(*fdq));
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001617
1618 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1619 return -ESRCH; /* Crazy XFS error code */
1620
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001621 if ((qid.type != USRQUOTA) &&
1622 (qid.type != GRPQUOTA))
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001623 return -EINVAL;
1624
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001625 error = qd_get(sdp, qid, &qd);
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001626 if (error)
1627 return error;
1628 error = do_glock(qd, FORCE, &q_gh);
1629 if (error)
1630 goto out;
1631
David Teigland4e2f8842012-11-14 13:47:37 -05001632 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Jan Kara14bf61f2014-10-09 16:03:13 +02001633 fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1634 fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1635 fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001636
1637 gfs2_glock_dq_uninit(&q_gh);
1638out:
1639 qd_put(qd);
1640 return error;
1641}
1642
Steven Whitehousee285c102009-09-23 13:50:49 +01001643/* GFS2 only supports a subset of the XFS fields */
Jan Kara14bf61f2014-10-09 16:03:13 +02001644#define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
Steven Whitehousee285c102009-09-23 13:50:49 +01001645
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001646static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
Jan Kara14bf61f2014-10-09 16:03:13 +02001647 struct qc_dqblk *fdq)
Steven Whitehousee285c102009-09-23 13:50:49 +01001648{
1649 struct gfs2_sbd *sdp = sb->s_fs_info;
1650 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1651 struct gfs2_quota_data *qd;
1652 struct gfs2_holder q_gh, i_gh;
1653 unsigned int data_blocks, ind_blocks;
1654 unsigned int blocks = 0;
1655 int alloc_required;
Steven Whitehousee285c102009-09-23 13:50:49 +01001656 loff_t offset;
1657 int error;
1658
1659 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1660 return -ESRCH; /* Crazy XFS error code */
1661
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001662 if ((qid.type != USRQUOTA) &&
1663 (qid.type != GRPQUOTA))
Steven Whitehousee285c102009-09-23 13:50:49 +01001664 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001665
1666 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1667 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001668
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001669 error = qd_get(sdp, qid, &qd);
Steven Whitehousee285c102009-09-23 13:50:49 +01001670 if (error)
1671 return error;
1672
Bob Petersonb54e9a02015-10-26 10:40:28 -05001673 error = gfs2_rsqa_alloc(ip);
Bob Peterson0a305e42012-06-06 11:17:59 +01001674 if (error)
1675 goto out_put;
1676
Al Viro59551022016-01-22 15:40:57 -05001677 inode_lock(&ip->i_inode);
Steven Whitehousee285c102009-09-23 13:50:49 +01001678 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1679 if (error)
Bob Peterson0a305e42012-06-06 11:17:59 +01001680 goto out_unlockput;
Steven Whitehousee285c102009-09-23 13:50:49 +01001681 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1682 if (error)
1683 goto out_q;
1684
1685 /* Check for existing entry, if none then alloc new blocks */
1686 error = update_qd(sdp, qd);
1687 if (error)
1688 goto out_i;
1689
1690 /* If nothing has changed, this is a no-op */
Jan Kara14bf61f2014-10-09 16:03:13 +02001691 if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1692 ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1693 fdq->d_fieldmask ^= QC_SPC_SOFT;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001694
Jan Kara14bf61f2014-10-09 16:03:13 +02001695 if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1696 ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1697 fdq->d_fieldmask ^= QC_SPC_HARD;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001698
Jan Kara14bf61f2014-10-09 16:03:13 +02001699 if ((fdq->d_fieldmask & QC_SPACE) &&
1700 ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1701 fdq->d_fieldmask ^= QC_SPACE;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001702
Steven Whitehousee285c102009-09-23 13:50:49 +01001703 if (fdq->d_fieldmask == 0)
1704 goto out_i;
1705
1706 offset = qd2offset(qd);
Bob Peterson461cb412010-06-24 19:21:20 -04001707 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
Abhijith Dase79a46a2011-02-07 11:22:41 -05001708 if (gfs2_is_stuffed(ip))
1709 alloc_required = 1;
Steven Whitehousee285c102009-09-23 13:50:49 +01001710 if (alloc_required) {
Steven Whitehouse7b9cff42013-10-02 11:13:25 +01001711 struct gfs2_alloc_parms ap = { .aflags = 0, };
Steven Whitehousee285c102009-09-23 13:50:49 +01001712 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1713 &data_blocks, &ind_blocks);
Bob Peterson564e12b2011-11-21 13:36:17 -05001714 blocks = 1 + data_blocks + ind_blocks;
Steven Whitehouse7b9cff42013-10-02 11:13:25 +01001715 ap.target = blocks;
1716 error = gfs2_inplace_reserve(ip, &ap);
Steven Whitehousee285c102009-09-23 13:50:49 +01001717 if (error)
Bob Peterson564e12b2011-11-21 13:36:17 -05001718 goto out_i;
Steven Whitehouse71f890f2012-07-30 14:53:19 +01001719 blocks += gfs2_rg_blocks(ip, blocks);
Steven Whitehousee285c102009-09-23 13:50:49 +01001720 }
1721
Abhijith Dase79a46a2011-02-07 11:22:41 -05001722 /* Some quotas span block boundaries and can update two blocks,
1723 adding an extra block to the transaction to handle such quotas */
1724 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001725 if (error)
1726 goto out_release;
1727
1728 /* Apply changes */
1729 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
Abhi Das9cde2892015-06-02 11:03:04 -05001730 if (!error)
1731 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
Steven Whitehousee285c102009-09-23 13:50:49 +01001732
1733 gfs2_trans_end(sdp);
1734out_release:
Bob Peterson564e12b2011-11-21 13:36:17 -05001735 if (alloc_required)
Steven Whitehousee285c102009-09-23 13:50:49 +01001736 gfs2_inplace_release(ip);
Steven Whitehousee285c102009-09-23 13:50:49 +01001737out_i:
1738 gfs2_glock_dq_uninit(&i_gh);
1739out_q:
1740 gfs2_glock_dq_uninit(&q_gh);
Bob Peterson0a305e42012-06-06 11:17:59 +01001741out_unlockput:
Al Viro59551022016-01-22 15:40:57 -05001742 inode_unlock(&ip->i_inode);
Bob Peterson0a305e42012-06-06 11:17:59 +01001743out_put:
Steven Whitehousee285c102009-09-23 13:50:49 +01001744 qd_put(qd);
1745 return error;
1746}
1747
Steven Whitehousecc632e72009-09-15 09:59:02 +01001748const struct quotactl_ops gfs2_quotactl_ops = {
1749 .quota_sync = gfs2_quota_sync,
Jan Karae54b2e22014-11-19 16:41:07 +01001750 .get_state = gfs2_quota_get_state,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001751 .get_dqblk = gfs2_get_dqblk,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001752 .set_dqblk = gfs2_set_dqblk,
Steven Whitehousecc632e72009-09-15 09:59:02 +01001753};
Steven Whitehousec754fbb2013-12-12 10:47:59 +00001754
1755void __init gfs2_quota_hash_init(void)
1756{
1757 unsigned i;
1758
1759 for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1760 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);
1761}