blob: db441359ee8cd2f31fa4a980afe8c54a3f715447 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Peterson0d0868b2007-12-11 18:51:25 -06003 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10/*
11 * Quota change tags are associated with each transaction that allocates or
12 * deallocates space. Those changes are accumulated locally to each node (in a
13 * per-node file) and then are periodically synced to the quota file. This
14 * avoids the bottleneck of constantly touching the quota file, but introduces
15 * fuzziness in the current usage value of IDs that are being used on different
16 * nodes in the cluster simultaneously. So, it is possible for a user on
17 * multiple nodes to overrun their quota, but that overrun is controlable.
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +010018 * Since quota tags are part of transactions, there is no need for a quota check
David Teiglandb3b94fa2006-01-16 16:50:04 +000019 * program to be run on node crashes or anything like that.
20 *
21 * There are couple of knobs that let the administrator manage the quota
22 * fuzziness. "quota_quantum" sets the maximum time a quota change can be
23 * sitting on one node before being synced to the quota file. (The default is
24 * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency
25 * of quota file syncs increases as the user moves closer to their limit. The
26 * more frequent the syncs, the more accurate the quota enforcement, but that
27 * means that there is more contention between the nodes for the quota file.
28 * The default value is one. This sets the maximum theoretical quota overrun
29 * (with infinite node with infinite bandwidth) to twice the user's limit. (In
30 * practice, the maximum overrun you see should be much less.) A "quota_scale"
31 * number greater than one makes quota syncs more frequent and reduces the
32 * maximum overrun. Numbers less than one (but greater than zero) make quota
33 * syncs less frequent.
34 *
35 * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
36 * the quota file, so it is not being constantly read.
37 */
38
39#include <linux/sched.h>
40#include <linux/slab.h>
Ying Han1495f232011-05-24 17:12:27 -070041#include <linux/mm.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000042#include <linux/spinlock.h>
43#include <linux/completion.h>
44#include <linux/buffer_head.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000045#include <linux/sort.h>
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000046#include <linux/fs.h>
Steven Whitehouse2e565bb2006-10-02 11:38:25 -040047#include <linux/bio.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050048#include <linux/gfs2_ondisk.h>
Steven Whitehouse37b2c832008-11-17 14:25:37 +000049#include <linux/kthread.h>
50#include <linux/freezer.h>
Steven Whitehouse2ec46502009-09-28 12:49:15 +010051#include <linux/quota.h>
Steven Whitehouse1d371b52009-09-11 15:57:27 +010052#include <linux/dqblk_xfs.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000053
54#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050055#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000056#include "bmap.h"
57#include "glock.h"
58#include "glops.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000059#include "log.h"
60#include "meta_io.h"
61#include "quota.h"
62#include "rgrp.h"
63#include "super.h"
64#include "trans.h"
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000065#include "inode.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050066#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000067
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010068struct gfs2_quota_change_host {
69 u64 qc_change;
70 u32 qc_flags; /* GFS2_QCF_... */
Eric W. Biedermane08d8d72013-01-31 19:25:50 -080071 struct kqid qc_id;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010072};
73
Abhijith Das0a7ab792009-01-07 16:03:37 -060074static LIST_HEAD(qd_lru_list);
75static atomic_t qd_lru_count = ATOMIC_INIT(0);
Xu Gang1328df72009-04-14 14:54:14 +080076static DEFINE_SPINLOCK(qd_lru_lock);
Abhijith Das0a7ab792009-01-07 16:03:37 -060077
Dave Chinner1ab6c492013-08-28 10:18:09 +100078unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
79 struct shrink_control *sc)
Abhijith Das0a7ab792009-01-07 16:03:37 -060080{
81 struct gfs2_quota_data *qd;
82 struct gfs2_sbd *sdp;
Ying Han1495f232011-05-24 17:12:27 -070083 int nr_to_scan = sc->nr_to_scan;
Dave Chinner1ab6c492013-08-28 10:18:09 +100084 long freed = 0;
Abhijith Das0a7ab792009-01-07 16:03:37 -060085
Ying Han1495f232011-05-24 17:12:27 -070086 if (!(sc->gfp_mask & __GFP_FS))
Dave Chinner1ab6c492013-08-28 10:18:09 +100087 return SHRINK_STOP;
Abhijith Das0a7ab792009-01-07 16:03:37 -060088
89 spin_lock(&qd_lru_lock);
Ying Han1495f232011-05-24 17:12:27 -070090 while (nr_to_scan && !list_empty(&qd_lru_list)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -060091 qd = list_entry(qd_lru_list.next,
92 struct gfs2_quota_data, qd_reclaim);
93 sdp = qd->qd_gl->gl_sbd;
94
95 /* Free from the filesystem-specific list */
96 list_del(&qd->qd_list);
97
Abhijith Das0a7ab792009-01-07 16:03:37 -060098 gfs2_assert_warn(sdp, !qd->qd_change);
99 gfs2_assert_warn(sdp, !qd->qd_slot_count);
100 gfs2_assert_warn(sdp, !qd->qd_bh_count);
101
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000102 gfs2_glock_put(qd->qd_gl);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600103 atomic_dec(&sdp->sd_quota_count);
104
105 /* Delete it from the common reclaim list */
106 list_del_init(&qd->qd_reclaim);
107 atomic_dec(&qd_lru_count);
108 spin_unlock(&qd_lru_lock);
109 kmem_cache_free(gfs2_quotad_cachep, qd);
110 spin_lock(&qd_lru_lock);
Ying Han1495f232011-05-24 17:12:27 -0700111 nr_to_scan--;
Dave Chinner1ab6c492013-08-28 10:18:09 +1000112 freed++;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600113 }
114 spin_unlock(&qd_lru_lock);
Dave Chinner1ab6c492013-08-28 10:18:09 +1000115 return freed;
116}
Abhijith Das0a7ab792009-01-07 16:03:37 -0600117
Dave Chinner1ab6c492013-08-28 10:18:09 +1000118unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
119 struct shrink_control *sc)
120{
Glauber Costa55f841c2013-08-28 10:17:53 +1000121 return vfs_pressure_ratio(atomic_read(&qd_lru_count));
Abhijith Das0a7ab792009-01-07 16:03:37 -0600122}
123
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800124static u64 qd2index(struct gfs2_quota_data *qd)
125{
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800126 struct kqid qid = qd->qd_id;
127 return (2 * (u64)from_kqid(&init_user_ns, qid)) +
Bob Peterson37f71572013-05-10 11:59:18 -0400128 ((qid.type == USRQUOTA) ? 0 : 1);
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800129}
130
Steven Whitehousecd915492006-09-04 12:49:07 -0400131static u64 qd2offset(struct gfs2_quota_data *qd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000132{
Steven Whitehousecd915492006-09-04 12:49:07 -0400133 u64 offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000134
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800135 offset = qd2index(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000136 offset *= sizeof(struct gfs2_quota);
137
138 return offset;
139}
140
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800141static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000142 struct gfs2_quota_data **qdp)
143{
144 struct gfs2_quota_data *qd;
145 int error;
146
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000147 qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000148 if (!qd)
149 return -ENOMEM;
150
Abhijith Das0a7ab792009-01-07 16:03:37 -0600151 atomic_set(&qd->qd_count, 1);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800152 qd->qd_id = qid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000153 qd->qd_slot = -1;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600154 INIT_LIST_HEAD(&qd->qd_reclaim);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000155
Eric W. Biederman2f6c9892013-01-31 18:33:38 -0800156 error = gfs2_glock_get(sdp, qd2index(qd),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000157 &gfs2_quota_glops, CREATE, &qd->qd_gl);
158 if (error)
159 goto fail;
160
David Teiglandb3b94fa2006-01-16 16:50:04 +0000161 *qdp = qd;
162
163 return 0;
164
Steven Whitehousea91ea692006-09-04 12:04:26 -0400165fail:
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000166 kmem_cache_free(gfs2_quotad_cachep, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000167 return error;
168}
169
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800170static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000171 struct gfs2_quota_data **qdp)
172{
173 struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
174 int error, found;
175
176 *qdp = NULL;
177
178 for (;;) {
179 found = 0;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600180 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000181 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800182 if (qid_eq(qd->qd_id, qid)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -0600183 if (!atomic_read(&qd->qd_count) &&
184 !list_empty(&qd->qd_reclaim)) {
185 /* Remove it from reclaim list */
186 list_del_init(&qd->qd_reclaim);
187 atomic_dec(&qd_lru_count);
188 }
189 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000190 found = 1;
191 break;
192 }
193 }
194
195 if (!found)
196 qd = NULL;
197
198 if (!qd && new_qd) {
199 qd = new_qd;
200 list_add(&qd->qd_list, &sdp->sd_quota_list);
201 atomic_inc(&sdp->sd_quota_count);
202 new_qd = NULL;
203 }
204
Abhijith Das0a7ab792009-01-07 16:03:37 -0600205 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000206
Steven Whitehouse6a6ada82009-09-15 16:30:38 +0100207 if (qd) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000208 if (new_qd) {
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000209 gfs2_glock_put(new_qd->qd_gl);
Steven Whitehouse37b2c832008-11-17 14:25:37 +0000210 kmem_cache_free(gfs2_quotad_cachep, new_qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000211 }
212 *qdp = qd;
213 return 0;
214 }
215
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800216 error = qd_alloc(sdp, qid, &new_qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000217 if (error)
218 return error;
219 }
220}
221
222static void qd_hold(struct gfs2_quota_data *qd)
223{
224 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Abhijith Das0a7ab792009-01-07 16:03:37 -0600225 gfs2_assert(sdp, atomic_read(&qd->qd_count));
226 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000227}
228
229static void qd_put(struct gfs2_quota_data *qd)
230{
Abhijith Das0a7ab792009-01-07 16:03:37 -0600231 if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) {
232 /* Add to the reclaim list */
233 list_add_tail(&qd->qd_reclaim, &qd_lru_list);
234 atomic_inc(&qd_lru_count);
235 spin_unlock(&qd_lru_lock);
236 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000237}
238
239static int slot_get(struct gfs2_quota_data *qd)
240{
241 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
242 unsigned int c, o = 0, b;
243 unsigned char byte = 0;
244
Steven Whitehouse22077f52009-01-08 14:28:42 +0000245 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000246
247 if (qd->qd_slot_count++) {
Steven Whitehouse22077f52009-01-08 14:28:42 +0000248 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000249 return 0;
250 }
251
252 for (c = 0; c < sdp->sd_quota_chunks; c++)
253 for (o = 0; o < PAGE_SIZE; o++) {
254 byte = sdp->sd_quota_bitmap[c][o];
255 if (byte != 0xFF)
256 goto found;
257 }
258
259 goto fail;
260
Steven Whitehousea91ea692006-09-04 12:04:26 -0400261found:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000262 for (b = 0; b < 8; b++)
263 if (!(byte & (1 << b)))
264 break;
265 qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b;
266
267 if (qd->qd_slot >= sdp->sd_quota_slots)
268 goto fail;
269
270 sdp->sd_quota_bitmap[c][o] |= 1 << b;
271
Steven Whitehouse22077f52009-01-08 14:28:42 +0000272 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000273
274 return 0;
275
Steven Whitehousea91ea692006-09-04 12:04:26 -0400276fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000277 qd->qd_slot_count--;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000278 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000279 return -ENOSPC;
280}
281
282static void slot_hold(struct gfs2_quota_data *qd)
283{
284 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
285
Steven Whitehouse22077f52009-01-08 14:28:42 +0000286 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000287 gfs2_assert(sdp, qd->qd_slot_count);
288 qd->qd_slot_count++;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000289 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000290}
291
292static void slot_put(struct gfs2_quota_data *qd)
293{
294 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
295
Steven Whitehouse22077f52009-01-08 14:28:42 +0000296 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000297 gfs2_assert(sdp, qd->qd_slot_count);
298 if (!--qd->qd_slot_count) {
299 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0);
300 qd->qd_slot = -1;
301 }
Steven Whitehouse22077f52009-01-08 14:28:42 +0000302 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000303}
304
305static int bh_get(struct gfs2_quota_data *qd)
306{
307 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400308 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000309 unsigned int block, offset;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000310 struct buffer_head *bh;
311 int error;
Steven Whitehouse23591252006-10-13 17:25:45 -0400312 struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000313
Steven Whitehousef55ab262006-02-21 12:51:39 +0000314 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000315
316 if (qd->qd_bh_count++) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000317 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000318 return 0;
319 }
320
321 block = qd->qd_slot / sdp->sd_qc_per_block;
Bob Peterson0d0868b2007-12-11 18:51:25 -0600322 offset = qd->qd_slot % sdp->sd_qc_per_block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000323
Steven Whitehouse23591252006-10-13 17:25:45 -0400324 bh_map.b_size = 1 << ip->i_inode.i_blkbits;
Bob Petersone9e1ef22007-12-10 14:13:27 -0600325 error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000326 if (error)
327 goto fail;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400328 error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000329 if (error)
330 goto fail;
331 error = -EIO;
332 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
333 goto fail_brelse;
334
335 qd->qd_bh = bh;
336 qd->qd_bh_qc = (struct gfs2_quota_change *)
337 (bh->b_data + sizeof(struct gfs2_meta_header) +
338 offset * sizeof(struct gfs2_quota_change));
339
Josef Whiter2e95b662007-02-20 00:03:29 -0500340 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000341
342 return 0;
343
Steven Whitehousea91ea692006-09-04 12:04:26 -0400344fail_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000345 brelse(bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400346fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000347 qd->qd_bh_count--;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000348 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000349 return error;
350}
351
352static void bh_put(struct gfs2_quota_data *qd)
353{
354 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
355
Steven Whitehousef55ab262006-02-21 12:51:39 +0000356 mutex_lock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000357 gfs2_assert(sdp, qd->qd_bh_count);
358 if (!--qd->qd_bh_count) {
359 brelse(qd->qd_bh);
360 qd->qd_bh = NULL;
361 qd->qd_bh_qc = NULL;
362 }
Steven Whitehousef55ab262006-02-21 12:51:39 +0000363 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000364}
365
366static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
367{
368 struct gfs2_quota_data *qd = NULL;
369 int error;
370 int found = 0;
371
372 *qdp = NULL;
373
374 if (sdp->sd_vfs->s_flags & MS_RDONLY)
375 return 0;
376
Abhijith Das0a7ab792009-01-07 16:03:37 -0600377 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000378
379 list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
380 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
381 !test_bit(QDF_CHANGE, &qd->qd_flags) ||
382 qd->qd_sync_gen >= sdp->sd_quota_sync_gen)
383 continue;
384
385 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
386
387 set_bit(QDF_LOCKED, &qd->qd_flags);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600388 gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
389 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000390 qd->qd_change_sync = qd->qd_change;
391 gfs2_assert_warn(sdp, qd->qd_slot_count);
392 qd->qd_slot_count++;
393 found = 1;
394
395 break;
396 }
397
398 if (!found)
399 qd = NULL;
400
Abhijith Das0a7ab792009-01-07 16:03:37 -0600401 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000402
403 if (qd) {
404 gfs2_assert_warn(sdp, qd->qd_change_sync);
405 error = bh_get(qd);
406 if (error) {
407 clear_bit(QDF_LOCKED, &qd->qd_flags);
408 slot_put(qd);
409 qd_put(qd);
410 return error;
411 }
412 }
413
414 *qdp = qd;
415
416 return 0;
417}
418
419static int qd_trylock(struct gfs2_quota_data *qd)
420{
421 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
422
423 if (sdp->sd_vfs->s_flags & MS_RDONLY)
424 return 0;
425
Abhijith Das0a7ab792009-01-07 16:03:37 -0600426 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000427
428 if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
429 !test_bit(QDF_CHANGE, &qd->qd_flags)) {
Abhijith Das0a7ab792009-01-07 16:03:37 -0600430 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000431 return 0;
432 }
433
434 list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
435
436 set_bit(QDF_LOCKED, &qd->qd_flags);
Abhijith Das0a7ab792009-01-07 16:03:37 -0600437 gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
438 atomic_inc(&qd->qd_count);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000439 qd->qd_change_sync = qd->qd_change;
440 gfs2_assert_warn(sdp, qd->qd_slot_count);
441 qd->qd_slot_count++;
442
Abhijith Das0a7ab792009-01-07 16:03:37 -0600443 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000444
445 gfs2_assert_warn(sdp, qd->qd_change_sync);
446 if (bh_get(qd)) {
447 clear_bit(QDF_LOCKED, &qd->qd_flags);
448 slot_put(qd);
449 qd_put(qd);
450 return 0;
451 }
452
453 return 1;
454}
455
456static void qd_unlock(struct gfs2_quota_data *qd)
457{
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500458 gfs2_assert_warn(qd->qd_gl->gl_sbd,
459 test_bit(QDF_LOCKED, &qd->qd_flags));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000460 clear_bit(QDF_LOCKED, &qd->qd_flags);
461 bh_put(qd);
462 slot_put(qd);
463 qd_put(qd);
464}
465
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800466static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000467 struct gfs2_quota_data **qdp)
468{
469 int error;
470
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800471 error = qd_get(sdp, qid, qdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000472 if (error)
473 return error;
474
475 error = slot_get(*qdp);
476 if (error)
477 goto fail;
478
479 error = bh_get(*qdp);
480 if (error)
481 goto fail_slot;
482
483 return 0;
484
Steven Whitehousea91ea692006-09-04 12:04:26 -0400485fail_slot:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000486 slot_put(*qdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400487fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000488 qd_put(*qdp);
489 return error;
490}
491
492static void qdsb_put(struct gfs2_quota_data *qd)
493{
494 bh_put(qd);
495 slot_put(qd);
496 qd_put(qd);
497}
498
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800499int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000500{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400501 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Bob Peterson5407e242012-05-18 09:28:23 -0400502 struct gfs2_quota_data **qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000503 int error;
504
Andrew Priceaaaf68c2012-10-12 16:45:08 +0100505 if (ip->i_res == NULL) {
506 error = gfs2_rs_alloc(ip);
507 if (error)
508 return error;
509 }
Bob Peterson5407e242012-05-18 09:28:23 -0400510
511 qd = ip->i_res->rs_qa_qd;
512
513 if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) ||
David Teiglandb3b94fa2006-01-16 16:50:04 +0000514 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
515 return -EIO;
516
517 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
518 return 0;
519
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800520 error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000521 if (error)
522 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400523 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000524 qd++;
525
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800526 error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000527 if (error)
528 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400529 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000530 qd++;
531
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800532 if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
533 !uid_eq(uid, ip->i_inode.i_uid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800534 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000535 if (error)
536 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400537 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000538 qd++;
539 }
540
Eric W. Biederman6b24c0d2013-01-31 21:56:13 -0800541 if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
542 !gid_eq(gid, ip->i_inode.i_gid)) {
Eric W. Biedermanb59c8b62013-01-31 19:35:56 -0800543 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000544 if (error)
545 goto out;
Bob Peterson5407e242012-05-18 09:28:23 -0400546 ip->i_res->rs_qa_qd_num++;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000547 qd++;
548 }
549
Steven Whitehousea91ea692006-09-04 12:04:26 -0400550out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000551 if (error)
552 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000553 return error;
554}
555
556void gfs2_quota_unhold(struct gfs2_inode *ip)
557{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400558 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000559 unsigned int x;
560
Bob Peterson5407e242012-05-18 09:28:23 -0400561 if (ip->i_res == NULL)
562 return;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000563 gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
564
Bob Peterson5407e242012-05-18 09:28:23 -0400565 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
566 qdsb_put(ip->i_res->rs_qa_qd[x]);
567 ip->i_res->rs_qa_qd[x] = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000568 }
Bob Peterson5407e242012-05-18 09:28:23 -0400569 ip->i_res->rs_qa_qd_num = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000570}
571
572static int sort_qd(const void *a, const void *b)
573{
Steven Whitehouse48fac172006-09-05 15:17:12 -0400574 const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
575 const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000576
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800577 if (qid_lt(qd_a->qd_id, qd_b->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400578 return -1;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800579 if (qid_lt(qd_b->qd_id, qd_a->qd_id))
Steven Whitehouse48fac172006-09-05 15:17:12 -0400580 return 1;
Steven Whitehouse48fac172006-09-05 15:17:12 -0400581 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000582}
583
Steven Whitehousecd915492006-09-04 12:49:07 -0400584static void do_qc(struct gfs2_quota_data *qd, s64 change)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000585{
586 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400587 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000588 struct gfs2_quota_change *qc = qd->qd_bh_qc;
Steven Whitehousecd915492006-09-04 12:49:07 -0400589 s64 x;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000590
Steven Whitehousef55ab262006-02-21 12:51:39 +0000591 mutex_lock(&sdp->sd_quota_mutex);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000592 gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000593
594 if (!test_bit(QDF_CHANGE, &qd->qd_flags)) {
595 qc->qc_change = 0;
596 qc->qc_flags = 0;
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800597 if (qd->qd_id.type == USRQUOTA)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000598 qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
Eric W. Biederman05e0a602013-01-31 19:52:08 -0800599 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000600 }
601
Al Virob44b84d2006-10-14 10:46:30 -0400602 x = be64_to_cpu(qc->qc_change) + change;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000603 qc->qc_change = cpu_to_be64(x);
604
Steven Whitehouse22077f52009-01-08 14:28:42 +0000605 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606 qd->qd_change = x;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000607 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000608
609 if (!x) {
610 gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags));
611 clear_bit(QDF_CHANGE, &qd->qd_flags);
612 qc->qc_flags = 0;
613 qc->qc_id = 0;
614 slot_put(qd);
615 qd_put(qd);
616 } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) {
617 qd_hold(qd);
618 slot_hold(qd);
619 }
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400620
Steven Whitehousef55ab262006-02-21 12:51:39 +0000621 mutex_unlock(&sdp->sd_quota_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000622}
623
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000624/**
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100625 * gfs2_adjust_quota - adjust record of current block usage
626 * @ip: The quota inode
627 * @loc: Offset of the entry in the quota file
Steven Whitehousee285c102009-09-23 13:50:49 +0100628 * @change: The amount of usage change to record
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100629 * @qd: The quota data
Steven Whitehousee285c102009-09-23 13:50:49 +0100630 * @fdq: The updated limits to record
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000631 *
632 * This function was mostly borrowed from gfs2_block_truncate_page which was
633 * in turn mostly borrowed from ext3
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100634 *
635 * Returns: 0 or -ve on error
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000636 */
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100637
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000638static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
Steven Whitehousee285c102009-09-23 13:50:49 +0100639 s64 change, struct gfs2_quota_data *qd,
640 struct fs_disk_quota *fdq)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000641{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400642 struct inode *inode = &ip->i_inode;
Abhijith Das14870b42010-11-18 11:24:24 -0500643 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000644 struct address_space *mapping = inode->i_mapping;
645 unsigned long index = loc >> PAGE_CACHE_SHIFT;
Abhijith Das1990e912007-05-31 17:52:02 -0500646 unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000647 unsigned blocksize, iblock, pos;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100648 struct buffer_head *bh;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000649 struct page *page;
Abhijith Das7e619bc2010-05-07 17:50:18 -0400650 void *kaddr, *ptr;
651 struct gfs2_quota q, *qp;
652 int err, nbytes;
Steven Whitehousee285c102009-09-23 13:50:49 +0100653 u64 size;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000654
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100655 if (gfs2_is_stuffed(ip)) {
656 err = gfs2_unstuff_dinode(ip, NULL);
657 if (err)
658 return err;
659 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400660
661 memset(&q, 0, sizeof(struct gfs2_quota));
Andrew Price43066292012-04-16 16:40:55 +0100662 err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
Abhijith Das7e619bc2010-05-07 17:50:18 -0400663 if (err < 0)
664 return err;
665
666 err = -EIO;
667 qp = &q;
668 qp->qu_value = be64_to_cpu(qp->qu_value);
669 qp->qu_value += change;
670 qp->qu_value = cpu_to_be64(qp->qu_value);
671 qd->qd_qb.qb_value = qp->qu_value;
672 if (fdq) {
673 if (fdq->d_fieldmask & FS_DQ_BSOFT) {
Abhijith Das14870b42010-11-18 11:24:24 -0500674 qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400675 qd->qd_qb.qb_warn = qp->qu_warn;
676 }
677 if (fdq->d_fieldmask & FS_DQ_BHARD) {
Abhijith Das14870b42010-11-18 11:24:24 -0500678 qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400679 qd->qd_qb.qb_limit = qp->qu_limit;
680 }
Abhijith Das802ec9b2010-11-18 11:26:46 -0500681 if (fdq->d_fieldmask & FS_DQ_BCOUNT) {
682 qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift);
683 qd->qd_qb.qb_value = qp->qu_value;
684 }
Abhijith Das7e619bc2010-05-07 17:50:18 -0400685 }
686
687 /* Write the quota into the quota file on disk */
688 ptr = qp;
689 nbytes = sizeof(struct gfs2_quota);
690get_a_page:
Bob Peterson220cca22012-03-19 15:25:50 -0400691 page = find_or_create_page(mapping, index, GFP_NOFS);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000692 if (!page)
693 return -ENOMEM;
694
695 blocksize = inode->i_sb->s_blocksize;
696 iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
697
698 if (!page_has_buffers(page))
699 create_empty_buffers(page, blocksize, 0);
700
701 bh = page_buffers(page);
702 pos = blocksize;
703 while (offset >= pos) {
704 bh = bh->b_this_page;
705 iblock++;
706 pos += blocksize;
707 }
708
709 if (!buffer_mapped(bh)) {
Bob Petersone9e1ef22007-12-10 14:13:27 -0600710 gfs2_block_map(inode, iblock, bh, 1);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000711 if (!buffer_mapped(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400712 goto unlock_out;
713 /* If it's a newly allocated disk block for quota, zero it */
Abhijith Das8b421602010-07-04 01:33:24 -0400714 if (buffer_new(bh))
715 zero_user(page, pos - blocksize, bh->b_size);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000716 }
717
718 if (PageUptodate(page))
719 set_buffer_uptodate(bh);
720
721 if (!buffer_uptodate(bh)) {
Steven Whitehouse20ed0532011-10-31 09:52:02 +0000722 ll_rw_block(READ | REQ_META, 1, &bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000723 wait_on_buffer(bh);
724 if (!buffer_uptodate(bh))
Abhijith Das7e619bc2010-05-07 17:50:18 -0400725 goto unlock_out;
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000726 }
727
Bob Peterson37f71572013-05-10 11:59:18 -0400728 gfs2_trans_add_data(ip->i_gl, bh);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000729
Cong Wangd9349282011-11-25 23:14:30 +0800730 kaddr = kmap_atomic(page);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400731 if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE)
732 nbytes = PAGE_CACHE_SIZE - offset;
733 memcpy(kaddr + offset, ptr, nbytes);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000734 flush_dcache_page(page);
Cong Wangd9349282011-11-25 23:14:30 +0800735 kunmap_atomic(kaddr);
Abhijith Das7e619bc2010-05-07 17:50:18 -0400736 unlock_page(page);
737 page_cache_release(page);
Steven Whitehousee285c102009-09-23 13:50:49 +0100738
Abhijith Das7e619bc2010-05-07 17:50:18 -0400739 /* If quota straddles page boundary, we need to update the rest of the
740 * quota at the beginning of the next page */
Abhijith Das8b421602010-07-04 01:33:24 -0400741 if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) {
Abhijith Das7e619bc2010-05-07 17:50:18 -0400742 ptr = ptr + nbytes;
743 nbytes = sizeof(struct gfs2_quota) - nbytes;
744 offset = 0;
745 index++;
746 goto get_a_page;
747 }
748
Steven Whitehousee285c102009-09-23 13:50:49 +0100749 size = loc + sizeof(struct gfs2_quota);
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100750 if (size > inode->i_size)
Steven Whitehousee285c102009-09-23 13:50:49 +0100751 i_size_write(inode, size);
Steven Whitehousee285c102009-09-23 13:50:49 +0100752 inode->i_mtime = inode->i_atime = CURRENT_TIME;
Steven Whitehousee285c102009-09-23 13:50:49 +0100753 mark_inode_dirty(inode);
Bob Peterson500242a2012-05-15 14:51:54 -0400754 return 0;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100755
Abhijith Das7e619bc2010-05-07 17:50:18 -0400756unlock_out:
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000757 unlock_page(page);
758 page_cache_release(page);
759 return err;
760}
761
David Teiglandb3b94fa2006-01-16 16:50:04 +0000762static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
763{
764 struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400765 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000766 unsigned int data_blocks, ind_blocks;
767 struct gfs2_holder *ghs, i_gh;
768 unsigned int qx, x;
769 struct gfs2_quota_data *qd;
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100770 unsigned reserved;
Steven Whitehousef42faf42006-01-30 18:34:10 +0000771 loff_t offset;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600772 unsigned int nalloc = 0, blocks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000773 int error;
774
Bob Peterson0a305e42012-06-06 11:17:59 +0100775 error = gfs2_rs_alloc(ip);
776 if (error)
777 return error;
778
David Teiglandb3b94fa2006-01-16 16:50:04 +0000779 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
780 &data_blocks, &ind_blocks);
781
Josef Bacik16c5f062008-04-09 09:33:41 -0400782 ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000783 if (!ghs)
784 return -ENOMEM;
785
786 sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
Jan Kara56aa72d2012-09-05 16:55:11 -0400787 mutex_lock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000788 for (qx = 0; qx < num_qd; qx++) {
Steven Whitehouse1e72c0f2009-09-15 20:42:56 +0100789 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000790 GL_NOCACHE, &ghs[qx]);
791 if (error)
792 goto out;
793 }
794
795 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
796 if (error)
797 goto out;
798
799 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000800 offset = qd2offset(qda[x]);
Bob Peterson461cb412010-06-24 19:21:20 -0400801 if (gfs2_write_alloc_required(ip, offset,
802 sizeof(struct gfs2_quota)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000803 nalloc++;
804 }
805
Abhijith Das20b95bf2008-03-06 17:43:52 -0600806 /*
807 * 1 blk for unstuffing inode if stuffed. We add this extra
808 * block to the reservation unconditionally. If the inode
809 * doesn't need unstuffing, the block will be released to the
810 * rgrp since it won't be allocated during the transaction
811 */
Abhijith Das7e619bc2010-05-07 17:50:18 -0400812 /* +3 in the end for unstuffing block, inode size update block
813 * and another block in case quota straddles page boundary and
814 * two blocks need to be updated instead of 1 */
815 blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600816
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100817 reserved = 1 + (nalloc * (data_blocks + ind_blocks));
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000818 error = gfs2_inplace_reserve(ip, reserved, 0);
Abhijith Das20b95bf2008-03-06 17:43:52 -0600819 if (error)
820 goto out_alloc;
821
822 if (nalloc)
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100823 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
Abhijith Das20b95bf2008-03-06 17:43:52 -0600824
825 error = gfs2_trans_begin(sdp, blocks, 0);
826 if (error)
827 goto out_ipres;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000828
829 for (x = 0; x < num_qd; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000830 qd = qda[x];
831 offset = qd2offset(qd);
Steven Whitehousee285c102009-09-23 13:50:49 +0100832 error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000833 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000834 goto out_end_trans;
835
David Teiglandb3b94fa2006-01-16 16:50:04 +0000836 do_qc(qd, -qd->qd_change_sync);
Abhijith Das662e3a52011-03-08 10:40:42 -0500837 set_bit(QDF_REFRESH, &qd->qd_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000838 }
839
840 error = 0;
841
Steven Whitehousea91ea692006-09-04 12:04:26 -0400842out_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000843 gfs2_trans_end(sdp);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400844out_ipres:
Abhijith Das20b95bf2008-03-06 17:43:52 -0600845 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400846out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000847 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400848out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000849 while (qx--)
850 gfs2_glock_dq_uninit(&ghs[qx]);
Steven Whitehousee285c102009-09-23 13:50:49 +0100851 mutex_unlock(&ip->i_inode.i_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000852 kfree(ghs);
Steven Whitehouseb09e5932006-04-07 11:17:32 -0400853 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000854 return error;
855}
856
Steven Whitehousee285c102009-09-23 13:50:49 +0100857static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
858{
859 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
860 struct gfs2_quota q;
861 struct gfs2_quota_lvb *qlvb;
862 loff_t pos;
863 int error;
864
865 memset(&q, 0, sizeof(struct gfs2_quota));
866 pos = qd2offset(qd);
Andrew Price43066292012-04-16 16:40:55 +0100867 error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
Steven Whitehousee285c102009-09-23 13:50:49 +0100868 if (error < 0)
869 return error;
870
David Teigland4e2f8842012-11-14 13:47:37 -0500871 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehousee285c102009-09-23 13:50:49 +0100872 qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
873 qlvb->__pad = 0;
874 qlvb->qb_limit = q.qu_limit;
875 qlvb->qb_warn = q.qu_warn;
876 qlvb->qb_value = q.qu_value;
877 qd->qd_qb = *qlvb;
878
879 return 0;
880}
881
David Teiglandb3b94fa2006-01-16 16:50:04 +0000882static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
883 struct gfs2_holder *q_gh)
884{
885 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400886 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000887 struct gfs2_holder i_gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000888 int error;
889
Steven Whitehousea91ea692006-09-04 12:04:26 -0400890restart:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000891 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
892 if (error)
893 return error;
894
David Teigland4e2f8842012-11-14 13:47:37 -0500895 qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000896
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400897 if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000898 gfs2_glock_dq_uninit(q_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100899 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
900 GL_NOCACHE, q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000901 if (error)
902 return error;
903
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400904 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000905 if (error)
906 goto fail;
907
Steven Whitehousee285c102009-09-23 13:50:49 +0100908 error = update_qd(sdp, qd);
909 if (error)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000910 goto fail_gunlock;
Steven Whitehousee285c102009-09-23 13:50:49 +0100911
David Teiglandb3b94fa2006-01-16 16:50:04 +0000912 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehouse91094d02009-09-11 15:21:56 +0100913 gfs2_glock_dq_uninit(q_gh);
914 force_refresh = 0;
915 goto restart;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000916 }
917
918 return 0;
919
Steven Whitehousea91ea692006-09-04 12:04:26 -0400920fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000921 gfs2_glock_dq_uninit(&i_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400922fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000923 gfs2_glock_dq_uninit(q_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000924 return error;
925}
926
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -0800927int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000928{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400929 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Abhijith Das662e3a52011-03-08 10:40:42 -0500930 struct gfs2_quota_data *qd;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000931 unsigned int x;
932 int error = 0;
933
Steven Whitehouse891a8e92011-09-19 10:25:49 +0100934 error = gfs2_quota_hold(ip, uid, gid);
935 if (error)
936 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000937
938 if (capable(CAP_SYS_RESOURCE) ||
939 sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
940 return 0;
941
Bob Peterson5407e242012-05-18 09:28:23 -0400942 sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num,
943 sizeof(struct gfs2_quota_data *), sort_qd, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000944
Bob Peterson5407e242012-05-18 09:28:23 -0400945 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
Abhijith Das662e3a52011-03-08 10:40:42 -0500946 int force = NO_FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400947 qd = ip->i_res->rs_qa_qd[x];
Abhijith Das662e3a52011-03-08 10:40:42 -0500948 if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
949 force = FORCE;
Bob Peterson5407e242012-05-18 09:28:23 -0400950 error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000951 if (error)
952 break;
953 }
954
955 if (!error)
956 set_bit(GIF_QD_LOCKED, &ip->i_flags);
957 else {
958 while (x--)
Bob Peterson5407e242012-05-18 09:28:23 -0400959 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000960 gfs2_quota_unhold(ip);
961 }
962
963 return error;
964}
965
966static int need_sync(struct gfs2_quota_data *qd)
967{
968 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
969 struct gfs2_tune *gt = &sdp->sd_tune;
Steven Whitehousecd915492006-09-04 12:49:07 -0400970 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000971 unsigned int num, den;
972 int do_sync = 1;
973
974 if (!qd->qd_qb.qb_limit)
975 return 0;
976
Steven Whitehouse22077f52009-01-08 14:28:42 +0000977 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000978 value = qd->qd_change;
Steven Whitehouse22077f52009-01-08 14:28:42 +0000979 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000980
981 spin_lock(&gt->gt_spin);
982 num = gt->gt_quota_scale_num;
983 den = gt->gt_quota_scale_den;
984 spin_unlock(&gt->gt_spin);
985
986 if (value < 0)
987 do_sync = 0;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400988 else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >=
989 (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000990 do_sync = 0;
991 else {
992 value *= gfs2_jindex_size(sdp) * num;
David Howells4abaca172008-07-11 14:39:56 +0100993 value = div_s64(value, den);
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400994 value += (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehousecd915492006-09-04 12:49:07 -0400995 if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000996 do_sync = 0;
997 }
998
999 return do_sync;
1000}
1001
1002void gfs2_quota_unlock(struct gfs2_inode *ip)
1003{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001004 struct gfs2_quota_data *qda[4];
1005 unsigned int count = 0;
1006 unsigned int x;
1007
1008 if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1009 goto out;
1010
Bob Peterson5407e242012-05-18 09:28:23 -04001011 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001012 struct gfs2_quota_data *qd;
1013 int sync;
1014
Bob Peterson5407e242012-05-18 09:28:23 -04001015 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001016 sync = need_sync(qd);
1017
Bob Peterson5407e242012-05-18 09:28:23 -04001018 gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001019
1020 if (sync && qd_trylock(qd))
1021 qda[count++] = qd;
1022 }
1023
1024 if (count) {
1025 do_sync(count, qda);
1026 for (x = 0; x < count; x++)
1027 qd_unlock(qda[x]);
1028 }
1029
Steven Whitehousea91ea692006-09-04 12:04:26 -04001030out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001031 gfs2_quota_unhold(ip);
1032}
1033
1034#define MAX_LINE 256
1035
1036static int print_message(struct gfs2_quota_data *qd, char *type)
1037{
1038 struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001039
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001040 printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n",
Steven Whitehouse02630a12006-07-03 11:20:06 -04001041 sdp->sd_fsname, type,
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001042 (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1043 from_kqid(&init_user_ns, qd->qd_id));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044
1045 return 0;
1046}
1047
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001048int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001049{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001050 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001051 struct gfs2_quota_data *qd;
Steven Whitehousecd915492006-09-04 12:49:07 -04001052 s64 value;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001053 unsigned int x;
1054 int error = 0;
1055
1056 if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1057 return 0;
1058
1059 if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
1060 return 0;
1061
Bob Peterson5407e242012-05-18 09:28:23 -04001062 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1063 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001064
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001065 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1066 qid_eq(qd->qd_id, make_kqid_gid(gid))))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001067 continue;
1068
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001069 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
Steven Whitehouse22077f52009-01-08 14:28:42 +00001070 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001071 value += qd->qd_change;
Steven Whitehouse22077f52009-01-08 14:28:42 +00001072 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001073
Steven Whitehousecd915492006-09-04 12:49:07 -04001074 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 +00001075 print_message(qd, "exceeded");
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001076 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001077 sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
1078
David Teiglandb3b94fa2006-01-16 16:50:04 +00001079 error = -EDQUOT;
1080 break;
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04001081 } else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
Steven Whitehousecd915492006-09-04 12:49:07 -04001082 (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value &&
David Teiglandb3b94fa2006-01-16 16:50:04 +00001083 time_after_eq(jiffies, qd->qd_last_warn +
Steven Whitehouse568f4c92006-02-27 12:00:42 -05001084 gfs2_tune_get(sdp,
1085 gt_quota_warn_period) * HZ)) {
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001086 quota_send_warning(qd->qd_id,
Steven Whitehouse2ec46502009-09-28 12:49:15 +01001087 sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001088 error = print_message(qd, "warning");
1089 qd->qd_last_warn = jiffies;
1090 }
1091 }
1092
1093 return error;
1094}
1095
Steven Whitehousecd915492006-09-04 12:49:07 -04001096void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
Eric W. Biederman7c06b5d2013-01-31 20:27:54 -08001097 kuid_t uid, kgid_t gid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001098{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001099 struct gfs2_quota_data *qd;
1100 unsigned int x;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001101
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001102 if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001103 return;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001104 if (ip->i_diskflags & GFS2_DIF_SYSTEM)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001105 return;
1106
Bob Peterson5407e242012-05-18 09:28:23 -04001107 for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) {
1108 qd = ip->i_res->rs_qa_qd[x];
David Teiglandb3b94fa2006-01-16 16:50:04 +00001109
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001110 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1111 qid_eq(qd->qd_id, make_kqid_gid(gid))) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001112 do_qc(qd, change);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001113 }
1114 }
1115}
1116
Jan Karaceed1722012-07-03 16:45:28 +02001117int gfs2_quota_sync(struct super_block *sb, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001118{
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001119 struct gfs2_sbd *sdp = sb->s_fs_info;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001120 struct gfs2_quota_data **qda;
1121 unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
1122 unsigned int num_qd;
1123 unsigned int x;
1124 int error = 0;
1125
1126 sdp->sd_quota_sync_gen++;
1127
1128 qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1129 if (!qda)
1130 return -ENOMEM;
1131
1132 do {
1133 num_qd = 0;
1134
1135 for (;;) {
1136 error = qd_fish(sdp, qda + num_qd);
1137 if (error || !qda[num_qd])
1138 break;
1139 if (++num_qd == max_qd)
1140 break;
1141 }
1142
1143 if (num_qd) {
1144 if (!error)
1145 error = do_sync(num_qd, qda);
1146 if (!error)
1147 for (x = 0; x < num_qd; x++)
1148 qda[x]->qd_sync_gen =
1149 sdp->sd_quota_sync_gen;
1150
1151 for (x = 0; x < num_qd; x++)
1152 qd_unlock(qda[x]);
1153 }
1154 } while (!error && num_qd == max_qd);
1155
1156 kfree(qda);
1157
1158 return error;
1159}
1160
Eric W. Biedermaned87dab2013-01-31 19:42:40 -08001161int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001162{
1163 struct gfs2_quota_data *qd;
1164 struct gfs2_holder q_gh;
1165 int error;
1166
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001167 error = qd_get(sdp, qid, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001168 if (error)
1169 return error;
1170
1171 error = do_glock(qd, FORCE, &q_gh);
1172 if (!error)
1173 gfs2_glock_dq_uninit(&q_gh);
1174
1175 qd_put(qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001176 return error;
1177}
1178
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001179static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf)
1180{
1181 const struct gfs2_quota_change *str = buf;
1182
1183 qc->qc_change = be64_to_cpu(str->qc_change);
1184 qc->qc_flags = be32_to_cpu(str->qc_flags);
Eric W. Biedermane08d8d72013-01-31 19:25:50 -08001185 qc->qc_id = make_kqid(&init_user_ns,
1186 (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA,
1187 be32_to_cpu(str->qc_id));
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001188}
1189
David Teiglandb3b94fa2006-01-16 16:50:04 +00001190int gfs2_quota_init(struct gfs2_sbd *sdp)
1191{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001192 struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001193 u64 size = i_size_read(sdp->sd_qc_inode);
1194 unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001195 unsigned int x, slot = 0;
1196 unsigned int found = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001197 u64 dblock;
1198 u32 extlen = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001199 int error;
1200
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001201 if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001202 return -EIO;
Steven Whitehousea2e0f792010-08-11 09:53:11 +01001203
David Teiglandb3b94fa2006-01-16 16:50:04 +00001204 sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001205 sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001206
1207 error = -ENOMEM;
1208
1209 sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks,
Josef Bacik16c5f062008-04-09 09:33:41 -04001210 sizeof(unsigned char *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001211 if (!sdp->sd_quota_bitmap)
1212 return error;
1213
1214 for (x = 0; x < sdp->sd_quota_chunks; x++) {
Josef Bacik16c5f062008-04-09 09:33:41 -04001215 sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001216 if (!sdp->sd_quota_bitmap[x])
1217 goto fail;
1218 }
1219
1220 for (x = 0; x < blocks; x++) {
1221 struct buffer_head *bh;
1222 unsigned int y;
1223
1224 if (!extlen) {
1225 int new = 0;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001226 error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001227 if (error)
1228 goto fail;
1229 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001230 error = -EIO;
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001231 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1232 if (!bh)
1233 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001234 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) {
1235 brelse(bh);
1236 goto fail;
1237 }
1238
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001239 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001240 y++, slot++) {
Al Virob62f9632006-10-13 23:46:46 -04001241 struct gfs2_quota_change_host qc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001242 struct gfs2_quota_data *qd;
1243
1244 gfs2_quota_change_in(&qc, bh->b_data +
1245 sizeof(struct gfs2_meta_header) +
1246 y * sizeof(struct gfs2_quota_change));
1247 if (!qc.qc_change)
1248 continue;
1249
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001250 error = qd_alloc(sdp, qc.qc_id, &qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001251 if (error) {
1252 brelse(bh);
1253 goto fail;
1254 }
1255
1256 set_bit(QDF_CHANGE, &qd->qd_flags);
1257 qd->qd_change = qc.qc_change;
1258 qd->qd_slot = slot;
1259 qd->qd_slot_count = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001260
Abhijith Das0a7ab792009-01-07 16:03:37 -06001261 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001262 gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1);
1263 list_add(&qd->qd_list, &sdp->sd_quota_list);
1264 atomic_inc(&sdp->sd_quota_count);
Abhijith Das0a7ab792009-01-07 16:03:37 -06001265 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001266
1267 found++;
1268 }
1269
1270 brelse(bh);
1271 dblock++;
1272 extlen--;
1273 }
1274
1275 if (found)
1276 fs_info(sdp, "found %u quota changes\n", found);
1277
1278 return 0;
1279
Steven Whitehousea91ea692006-09-04 12:04:26 -04001280fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001281 gfs2_quota_cleanup(sdp);
1282 return error;
1283}
1284
David Teiglandb3b94fa2006-01-16 16:50:04 +00001285void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1286{
1287 struct list_head *head = &sdp->sd_quota_list;
1288 struct gfs2_quota_data *qd;
1289 unsigned int x;
1290
Abhijith Das0a7ab792009-01-07 16:03:37 -06001291 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001292 while (!list_empty(head)) {
1293 qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
1294
Abhijith Das0a7ab792009-01-07 16:03:37 -06001295 if (atomic_read(&qd->qd_count) > 1 ||
1296 (atomic_read(&qd->qd_count) &&
1297 !test_bit(QDF_CHANGE, &qd->qd_flags))) {
Abhijith Das0a7ab792009-01-07 16:03:37 -06001298 list_move(&qd->qd_list, head);
1299 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001300 schedule();
Abhijith Das0a7ab792009-01-07 16:03:37 -06001301 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001302 continue;
1303 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001304
Abhijith Das0a7ab792009-01-07 16:03:37 -06001305 list_del(&qd->qd_list);
1306 /* Also remove if this qd exists in the reclaim list */
1307 if (!list_empty(&qd->qd_reclaim)) {
1308 list_del_init(&qd->qd_reclaim);
1309 atomic_dec(&qd_lru_count);
1310 }
1311 atomic_dec(&sdp->sd_quota_count);
1312 spin_unlock(&qd_lru_lock);
1313
1314 if (!atomic_read(&qd->qd_count)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001315 gfs2_assert_warn(sdp, !qd->qd_change);
1316 gfs2_assert_warn(sdp, !qd->qd_slot_count);
1317 } else
1318 gfs2_assert_warn(sdp, qd->qd_slot_count == 1);
1319 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1320
Steven Whitehousef057f6c2009-01-12 10:43:39 +00001321 gfs2_glock_put(qd->qd_gl);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001322 kmem_cache_free(gfs2_quotad_cachep, qd);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001323
Abhijith Das0a7ab792009-01-07 16:03:37 -06001324 spin_lock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001325 }
Abhijith Das0a7ab792009-01-07 16:03:37 -06001326 spin_unlock(&qd_lru_lock);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001327
1328 gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
1329
1330 if (sdp->sd_quota_bitmap) {
1331 for (x = 0; x < sdp->sd_quota_chunks; x++)
1332 kfree(sdp->sd_quota_bitmap[x]);
1333 kfree(sdp->sd_quota_bitmap);
1334 }
1335}
1336
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001337static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1338{
1339 if (error == 0 || error == -EROFS)
1340 return;
1341 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
1342 fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1343}
1344
1345static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001346 int (*fxn)(struct super_block *sb, int type),
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001347 unsigned long t, unsigned long *timeo,
1348 unsigned int *new_timeo)
1349{
1350 if (t >= *timeo) {
Steven Whitehouse8c42d632009-09-11 14:36:44 +01001351 int error = fxn(sdp->sd_vfs, 0);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001352 quotad_error(sdp, msg, error);
1353 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1354 } else {
1355 *timeo -= t;
1356 }
1357}
1358
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001359static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
1360{
1361 struct gfs2_inode *ip;
1362
1363 while(1) {
1364 ip = NULL;
1365 spin_lock(&sdp->sd_trunc_lock);
1366 if (!list_empty(&sdp->sd_trunc_list)) {
1367 ip = list_entry(sdp->sd_trunc_list.next,
1368 struct gfs2_inode, i_trunc_list);
1369 list_del_init(&ip->i_trunc_list);
1370 }
1371 spin_unlock(&sdp->sd_trunc_lock);
1372 if (ip == NULL)
1373 return;
1374 gfs2_glock_finish_truncate(ip);
1375 }
1376}
1377
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001378void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1379 if (!sdp->sd_statfs_force_sync) {
1380 sdp->sd_statfs_force_sync = 1;
1381 wake_up(&sdp->sd_quota_wait);
1382 }
1383}
1384
1385
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001386/**
1387 * gfs2_quotad - Write cached quota changes into the quota file
1388 * @sdp: Pointer to GFS2 superblock
1389 *
1390 */
1391
1392int gfs2_quotad(void *data)
1393{
1394 struct gfs2_sbd *sdp = data;
1395 struct gfs2_tune *tune = &sdp->sd_tune;
1396 unsigned long statfs_timeo = 0;
1397 unsigned long quotad_timeo = 0;
1398 unsigned long t = 0;
1399 DEFINE_WAIT(wait);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001400 int empty;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001401
1402 while (!kthread_should_stop()) {
1403
1404 /* Update the master statfs file */
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001405 if (sdp->sd_statfs_force_sync) {
1406 int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1407 quotad_error(sdp, "statfs", error);
1408 statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1409 }
1410 else
1411 quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1412 &statfs_timeo,
1413 &tune->gt_statfs_quantum);
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001414
1415 /* Update quota file */
Steven Whitehouseedd2e9a2013-06-03 11:12:59 +01001416 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001417 &quotad_timeo, &tune->gt_quota_quantum);
1418
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001419 /* Check for & recover partially truncated inodes */
1420 quotad_check_trunc_list(sdp);
1421
Tejun Heoa0acae02011-11-21 12:32:22 -08001422 try_to_freeze();
1423
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001424 t = min(quotad_timeo, statfs_timeo);
1425
Steven Whitehouse7fa5d202009-03-31 15:49:08 +01001426 prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001427 spin_lock(&sdp->sd_trunc_lock);
1428 empty = list_empty(&sdp->sd_trunc_list);
1429 spin_unlock(&sdp->sd_trunc_lock);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001430 if (empty && !sdp->sd_statfs_force_sync)
Steven Whitehouse813e0c42008-11-18 13:38:48 +00001431 t -= schedule_timeout(t);
1432 else
1433 t = 0;
Steven Whitehouse37b2c832008-11-17 14:25:37 +00001434 finish_wait(&sdp->sd_quota_wait, &wait);
1435 }
1436
1437 return 0;
1438}
1439
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001440static int gfs2_quota_get_xstate(struct super_block *sb,
1441 struct fs_quota_stat *fqs)
1442{
1443 struct gfs2_sbd *sdp = sb->s_fs_info;
1444
1445 memset(fqs, 0, sizeof(struct fs_quota_stat));
1446 fqs->qs_version = FS_QSTAT_VERSION;
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001447
1448 switch (sdp->sd_args.ar_quota) {
1449 case GFS2_QUOTA_ON:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001450 fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001451 /*FALLTHRU*/
1452 case GFS2_QUOTA_ACCOUNT:
Christoph Hellwigade7ce32010-06-04 10:56:01 +02001453 fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT);
Christoph Hellwigad6bb902010-05-05 00:10:56 +02001454 break;
1455 case GFS2_QUOTA_OFF:
1456 break;
1457 }
1458
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001459 if (sdp->sd_quota_inode) {
1460 fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1461 fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
1462 }
1463 fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
1464 fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
1465 fqs->qs_incoredqs = atomic_read(&qd_lru_count);
1466 return 0;
1467}
1468
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001469static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001470 struct fs_disk_quota *fdq)
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001471{
1472 struct gfs2_sbd *sdp = sb->s_fs_info;
1473 struct gfs2_quota_lvb *qlvb;
1474 struct gfs2_quota_data *qd;
1475 struct gfs2_holder q_gh;
1476 int error;
1477
1478 memset(fdq, 0, sizeof(struct fs_disk_quota));
1479
1480 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1481 return -ESRCH; /* Crazy XFS error code */
1482
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001483 if ((qid.type != USRQUOTA) &&
1484 (qid.type != GRPQUOTA))
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001485 return -EINVAL;
1486
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001487 error = qd_get(sdp, qid, &qd);
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001488 if (error)
1489 return error;
1490 error = do_glock(qd, FORCE, &q_gh);
1491 if (error)
1492 goto out;
1493
David Teigland4e2f8842012-11-14 13:47:37 -05001494 qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001495 fdq->d_version = FS_DQUOT_VERSION;
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001496 fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA;
Eric W. Biederman558e8522013-01-31 18:15:33 -08001497 fdq->d_id = from_kqid_munged(current_user_ns(), qid);
Abhijith Das14870b42010-11-18 11:24:24 -05001498 fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift;
1499 fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift;
1500 fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift;
Steven Whitehouse113d6b32009-09-28 11:52:16 +01001501
1502 gfs2_glock_dq_uninit(&q_gh);
1503out:
1504 qd_put(qd);
1505 return error;
1506}
1507
Steven Whitehousee285c102009-09-23 13:50:49 +01001508/* GFS2 only supports a subset of the XFS fields */
Abhijith Das802ec9b2010-11-18 11:26:46 -05001509#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT)
Steven Whitehousee285c102009-09-23 13:50:49 +01001510
Eric W. Biederman74a8a102012-09-16 02:07:49 -07001511static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001512 struct fs_disk_quota *fdq)
Steven Whitehousee285c102009-09-23 13:50:49 +01001513{
1514 struct gfs2_sbd *sdp = sb->s_fs_info;
1515 struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1516 struct gfs2_quota_data *qd;
1517 struct gfs2_holder q_gh, i_gh;
1518 unsigned int data_blocks, ind_blocks;
1519 unsigned int blocks = 0;
1520 int alloc_required;
Steven Whitehousee285c102009-09-23 13:50:49 +01001521 loff_t offset;
1522 int error;
1523
1524 if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1525 return -ESRCH; /* Crazy XFS error code */
1526
Eric W. Biederman236c64e2013-01-31 20:09:30 -08001527 if ((qid.type != USRQUOTA) &&
1528 (qid.type != GRPQUOTA))
Steven Whitehousee285c102009-09-23 13:50:49 +01001529 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001530
1531 if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1532 return -EINVAL;
Steven Whitehousee285c102009-09-23 13:50:49 +01001533
Eric W. Biederman05e0a602013-01-31 19:52:08 -08001534 error = qd_get(sdp, qid, &qd);
Steven Whitehousee285c102009-09-23 13:50:49 +01001535 if (error)
1536 return error;
1537
Bob Peterson0a305e42012-06-06 11:17:59 +01001538 error = gfs2_rs_alloc(ip);
1539 if (error)
1540 goto out_put;
1541
Steven Whitehousee285c102009-09-23 13:50:49 +01001542 mutex_lock(&ip->i_inode.i_mutex);
1543 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1544 if (error)
Bob Peterson0a305e42012-06-06 11:17:59 +01001545 goto out_unlockput;
Steven Whitehousee285c102009-09-23 13:50:49 +01001546 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1547 if (error)
1548 goto out_q;
1549
1550 /* Check for existing entry, if none then alloc new blocks */
1551 error = update_qd(sdp, qd);
1552 if (error)
1553 goto out_i;
1554
1555 /* If nothing has changed, this is a no-op */
1556 if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
Abhijith Das14870b42010-11-18 11:24:24 -05001557 ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
Steven Whitehousee285c102009-09-23 13:50:49 +01001558 fdq->d_fieldmask ^= FS_DQ_BSOFT;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001559
Steven Whitehousee285c102009-09-23 13:50:49 +01001560 if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
Abhijith Das14870b42010-11-18 11:24:24 -05001561 ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
Steven Whitehousee285c102009-09-23 13:50:49 +01001562 fdq->d_fieldmask ^= FS_DQ_BHARD;
Abhijith Das802ec9b2010-11-18 11:26:46 -05001563
1564 if ((fdq->d_fieldmask & FS_DQ_BCOUNT) &&
1565 ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1566 fdq->d_fieldmask ^= FS_DQ_BCOUNT;
1567
Steven Whitehousee285c102009-09-23 13:50:49 +01001568 if (fdq->d_fieldmask == 0)
1569 goto out_i;
1570
1571 offset = qd2offset(qd);
Bob Peterson461cb412010-06-24 19:21:20 -04001572 alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
Abhijith Dase79a46a2011-02-07 11:22:41 -05001573 if (gfs2_is_stuffed(ip))
1574 alloc_required = 1;
Steven Whitehousee285c102009-09-23 13:50:49 +01001575 if (alloc_required) {
Steven Whitehousee285c102009-09-23 13:50:49 +01001576 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1577 &data_blocks, &ind_blocks);
Bob Peterson564e12b2011-11-21 13:36:17 -05001578 blocks = 1 + data_blocks + ind_blocks;
Steven Whitehouse9dbe9612012-10-31 10:37:10 +00001579 error = gfs2_inplace_reserve(ip, blocks, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001580 if (error)
Bob Peterson564e12b2011-11-21 13:36:17 -05001581 goto out_i;
Steven Whitehouse71f890f2012-07-30 14:53:19 +01001582 blocks += gfs2_rg_blocks(ip, blocks);
Steven Whitehousee285c102009-09-23 13:50:49 +01001583 }
1584
Abhijith Dase79a46a2011-02-07 11:22:41 -05001585 /* Some quotas span block boundaries and can update two blocks,
1586 adding an extra block to the transaction to handle such quotas */
1587 error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
Steven Whitehousee285c102009-09-23 13:50:49 +01001588 if (error)
1589 goto out_release;
1590
1591 /* Apply changes */
1592 error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
1593
1594 gfs2_trans_end(sdp);
1595out_release:
Bob Peterson564e12b2011-11-21 13:36:17 -05001596 if (alloc_required)
Steven Whitehousee285c102009-09-23 13:50:49 +01001597 gfs2_inplace_release(ip);
Steven Whitehousee285c102009-09-23 13:50:49 +01001598out_i:
1599 gfs2_glock_dq_uninit(&i_gh);
1600out_q:
1601 gfs2_glock_dq_uninit(&q_gh);
Bob Peterson0a305e42012-06-06 11:17:59 +01001602out_unlockput:
Steven Whitehousee285c102009-09-23 13:50:49 +01001603 mutex_unlock(&ip->i_inode.i_mutex);
Bob Peterson0a305e42012-06-06 11:17:59 +01001604out_put:
Steven Whitehousee285c102009-09-23 13:50:49 +01001605 qd_put(qd);
1606 return error;
1607}
1608
Steven Whitehousecc632e72009-09-15 09:59:02 +01001609const struct quotactl_ops gfs2_quotactl_ops = {
1610 .quota_sync = gfs2_quota_sync,
Steven Whitehouse1d371b52009-09-11 15:57:27 +01001611 .get_xstate = gfs2_quota_get_xstate,
Christoph Hellwigb9b2dd32010-05-06 17:04:58 -04001612 .get_dqblk = gfs2_get_dqblk,
Christoph Hellwigc472b432010-05-06 17:05:17 -04001613 .set_dqblk = gfs2_set_dqblk,
Steven Whitehousecc632e72009-09-15 09:59:02 +01001614};