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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott4ce31212005-11-02 14:59:41 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott4ce31212005-11-02 14:59:41 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott4ce31212005-11-02 14:59:41 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott4ce31212005-11-02 14:59:41 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
19#include "xfs_fs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110022#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_quota.h"
28#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_bmap_btree.h"
30#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_dinode.h"
32#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110033#include "xfs_ialloc.h"
34#include "xfs_itable.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_rtalloc.h"
36#include "xfs_error.h"
Nathan Scotta844f452005-11-02 14:38:42 +110037#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_attr.h"
39#include "xfs_buf_item.h"
40#include "xfs_trans_space.h"
41#include "xfs_utils.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include "xfs_qm.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000043#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45/*
46 * The global quota manager. There is only one of these for the entire
47 * system, _not_ one per file system. XQM keeps track of the overall
48 * quota functionality, including maintaining the freelist and hash
49 * tables of dquots.
50 */
Christoph Hellwiga0b0b8a2009-03-29 09:51:00 +020051struct mutex xfs_Gqm_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052struct xfs_qm *xfs_Gqm;
Nathan Scott6b3f6b52005-11-02 15:08:25 +110053uint ndquot;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55kmem_zone_t *qm_dqzone;
56kmem_zone_t *qm_dqtrxzone;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
59STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
60
61STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
Christoph Hellwigba0f32d2005-06-21 15:36:52 +100062STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
Ying Han1495f232011-05-24 17:12:27 -070063STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Rusty Russell8e1f9362007-07-17 04:03:17 -070065static struct shrinker xfs_qm_shaker = {
66 .shrink = xfs_qm_shake,
67 .seeks = DEFAULT_SEEKS,
68};
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070/*
71 * Initialize the XQM structure.
72 * Note that there is not one quota manager per file system.
73 */
74STATIC struct xfs_qm *
75xfs_Gqm_init(void)
76{
Nathan Scott6b3f6b52005-11-02 15:08:25 +110077 xfs_dqhash_t *udqhash, *gdqhash;
78 xfs_qm_t *xqm;
Nathan Scott215101c2006-09-28 11:04:43 +100079 size_t hsize;
80 uint i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82 /*
83 * Initialize the dquot hash tables.
84 */
Nathan Scott77e46352006-09-28 11:03:27 +100085 udqhash = kmem_zalloc_greedy(&hsize,
Eric Sandeen5995cb72007-08-16 16:49:11 +100086 XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
Christoph Hellwigbdfb0432010-01-20 21:55:30 +000087 XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t));
88 if (!udqhash)
89 goto out;
90
91 gdqhash = kmem_zalloc_large(hsize);
Julia Lawalld67b1b02010-02-06 08:45:15 +000092 if (!gdqhash)
Christoph Hellwigbdfb0432010-01-20 21:55:30 +000093 goto out_free_udqhash;
94
Nathan Scott77e46352006-09-28 11:03:27 +100095 hsize /= sizeof(xfs_dqhash_t);
Nathan Scott6b3f6b52005-11-02 15:08:25 +110096 ndquot = hsize << 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Nathan Scott6b3f6b52005-11-02 15:08:25 +110098 xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
99 xqm->qm_dqhashmask = hsize - 1;
100 xqm->qm_usr_dqhtable = udqhash;
101 xqm->qm_grp_dqhtable = gdqhash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 ASSERT(xqm->qm_usr_dqhtable != NULL);
103 ASSERT(xqm->qm_grp_dqhtable != NULL);
104
105 for (i = 0; i < hsize; i++) {
106 xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
107 xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
108 }
109
110 /*
111 * Freelist of all dquots of all file systems
112 */
Dave Chinner3a8406f2010-04-13 15:06:52 +1000113 INIT_LIST_HEAD(&xqm->qm_dqfrlist);
114 xqm->qm_dqfrlist_cnt = 0;
115 mutex_init(&xqm->qm_dqfrlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117 /*
118 * dquot zone. we register our own low-memory callback.
119 */
120 if (!qm_dqzone) {
121 xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
122 "xfs_dquots");
123 qm_dqzone = xqm->qm_dqzone;
124 } else
125 xqm->qm_dqzone = qm_dqzone;
126
Rusty Russell8e1f9362007-07-17 04:03:17 -0700127 register_shrinker(&xfs_qm_shaker);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129 /*
130 * The t_dqinfo portion of transactions.
131 */
132 if (!qm_dqtrxzone) {
133 xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
134 "xfs_dqtrx");
135 qm_dqtrxzone = xqm->qm_dqtrxzone;
136 } else
137 xqm->qm_dqtrxzone = qm_dqtrxzone;
138
139 atomic_set(&xqm->qm_totaldquots, 0);
140 xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
141 xqm->qm_nrefs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 return xqm;
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000143
144 out_free_udqhash:
145 kmem_free_large(udqhash);
146 out:
147 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148}
149
150/*
151 * Destroy the global quota manager when its reference count goes to zero.
152 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000153STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154xfs_qm_destroy(
155 struct xfs_qm *xqm)
156{
Dave Chinner3a8406f2010-04-13 15:06:52 +1000157 struct xfs_dquot *dqp, *n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 int hsize, i;
159
160 ASSERT(xqm != NULL);
161 ASSERT(xqm->qm_nrefs == 0);
Rusty Russell8e1f9362007-07-17 04:03:17 -0700162 unregister_shrinker(&xfs_qm_shaker);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 hsize = xqm->qm_dqhashmask + 1;
164 for (i = 0; i < hsize; i++) {
165 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
166 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
167 }
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000168 kmem_free_large(xqm->qm_usr_dqhtable);
169 kmem_free_large(xqm->qm_grp_dqhtable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 xqm->qm_usr_dqhtable = NULL;
171 xqm->qm_grp_dqhtable = NULL;
172 xqm->qm_dqhashmask = 0;
Dave Chinner3a8406f2010-04-13 15:06:52 +1000173
174 /* frlist cleanup */
175 mutex_lock(&xqm->qm_dqfrlist_lock);
176 list_for_each_entry_safe(dqp, n, &xqm->qm_dqfrlist, q_freelist) {
177 xfs_dqlock(dqp);
Dave Chinner3a8406f2010-04-13 15:06:52 +1000178 list_del_init(&dqp->q_freelist);
179 xfs_Gqm->qm_dqfrlist_cnt--;
180 xfs_dqunlock(dqp);
181 xfs_qm_dqdestroy(dqp);
182 }
183 mutex_unlock(&xqm->qm_dqfrlist_lock);
184 mutex_destroy(&xqm->qm_dqfrlist_lock);
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000185 kmem_free(xqm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
187
188/*
189 * Called at mount time to let XQM know that another file system is
190 * starting quotas. This isn't crucial information as the individual mount
191 * structures are pretty independent, but it helps the XQM keep a
192 * global view of what's going on.
193 */
194/* ARGSUSED */
195STATIC int
196xfs_qm_hold_quotafs_ref(
197 struct xfs_mount *mp)
198{
199 /*
200 * Need to lock the xfs_Gqm structure for things like this. For example,
201 * the structure could disappear between the entry to this routine and
202 * a HOLD operation if not locked.
203 */
Christoph Hellwige2494582009-02-09 08:38:39 +0100204 mutex_lock(&xfs_Gqm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000206 if (!xfs_Gqm) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 xfs_Gqm = xfs_Gqm_init();
Julia Lawall38e712a2010-05-26 15:57:23 +0000208 if (!xfs_Gqm) {
209 mutex_unlock(&xfs_Gqm_lock);
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000210 return ENOMEM;
Julia Lawall38e712a2010-05-26 15:57:23 +0000211 }
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000212 }
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /*
215 * We can keep a list of all filesystems with quotas mounted for
216 * debugging and statistical purposes, but ...
217 * Just take a reference and get out.
218 */
Christoph Hellwige2494582009-02-09 08:38:39 +0100219 xfs_Gqm->qm_nrefs++;
220 mutex_unlock(&xfs_Gqm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222 return 0;
223}
224
225
226/*
227 * Release the reference that a filesystem took at mount time,
228 * so that we know when we need to destroy the entire quota manager.
229 */
230/* ARGSUSED */
231STATIC void
232xfs_qm_rele_quotafs_ref(
233 struct xfs_mount *mp)
234{
Dave Chinner3a8406f2010-04-13 15:06:52 +1000235 xfs_dquot_t *dqp, *n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237 ASSERT(xfs_Gqm);
238 ASSERT(xfs_Gqm->qm_nrefs > 0);
239
240 /*
241 * Go thru the freelist and destroy all inactive dquots.
242 */
Dave Chinner3a8406f2010-04-13 15:06:52 +1000243 mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Dave Chinner3a8406f2010-04-13 15:06:52 +1000245 list_for_each_entry_safe(dqp, n, &xfs_Gqm->qm_dqfrlist, q_freelist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 xfs_dqlock(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
248 ASSERT(dqp->q_mount == NULL);
249 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
Dave Chinnere6a81f12010-04-13 15:06:51 +1000250 ASSERT(list_empty(&dqp->q_hashlist));
Dave Chinner3a254042010-04-13 15:06:48 +1000251 ASSERT(list_empty(&dqp->q_mplist));
Dave Chinner3a8406f2010-04-13 15:06:52 +1000252 list_del_init(&dqp->q_freelist);
253 xfs_Gqm->qm_dqfrlist_cnt--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 xfs_dqunlock(dqp);
255 xfs_qm_dqdestroy(dqp);
256 } else {
257 xfs_dqunlock(dqp);
258 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 }
Dave Chinner3a8406f2010-04-13 15:06:52 +1000260 mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 /*
263 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
264 * be restarted.
265 */
Christoph Hellwige2494582009-02-09 08:38:39 +0100266 mutex_lock(&xfs_Gqm_lock);
267 if (--xfs_Gqm->qm_nrefs == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 xfs_qm_destroy(xfs_Gqm);
269 xfs_Gqm = NULL;
270 }
Christoph Hellwige2494582009-02-09 08:38:39 +0100271 mutex_unlock(&xfs_Gqm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}
273
274/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 * Just destroy the quotainfo structure.
276 */
277void
Christoph Hellwig7d095252009-06-08 15:33:32 +0200278xfs_qm_unmount(
279 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280{
Christoph Hellwig7d095252009-06-08 15:33:32 +0200281 if (mp->m_quotainfo) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +1000282 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 xfs_qm_destroy_quotainfo(mp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200284 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285}
286
287
288/*
289 * This is called from xfs_mountfs to start quotas and initialize all
290 * necessary data structures like quotainfo. This is also responsible for
291 * running a quotacheck as necessary. We are guaranteed that the superblock
292 * is consistently read in at this point.
David Chinner53aa7912008-04-10 12:20:31 +1000293 *
294 * If we fail here, the mount will continue with quota turned off. We don't
295 * need to inidicate success or failure at all.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 */
David Chinner53aa7912008-04-10 12:20:31 +1000297void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298xfs_qm_mount_quotas(
Christoph Hellwig42490232008-08-13 16:49:32 +1000299 xfs_mount_t *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 int error = 0;
302 uint sbf;
303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 /*
305 * If quotas on realtime volumes is not supported, we disable
306 * quotas immediately.
307 */
308 if (mp->m_sb.sb_rextents) {
Dave Chinner0b932cc2011-03-07 10:08:35 +1100309 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 mp->m_qflags = 0;
311 goto write_changes;
312 }
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
Nathan Scott155ffd02005-09-02 16:43:48 +1000315
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 /*
317 * Allocate the quotainfo structure inside the mount struct, and
318 * create quotainode(s), and change/rev superblock if necessary.
319 */
David Chinner53aa7912008-04-10 12:20:31 +1000320 error = xfs_qm_init_quotainfo(mp);
321 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 /*
323 * We must turn off quotas.
324 */
325 ASSERT(mp->m_quotainfo == NULL);
326 mp->m_qflags = 0;
327 goto write_changes;
328 }
329 /*
330 * If any of the quotas are not consistent, do a quotacheck.
331 */
Christoph Hellwig42490232008-08-13 16:49:32 +1000332 if (XFS_QM_NEED_QUOTACHECK(mp)) {
David Chinner53aa7912008-04-10 12:20:31 +1000333 error = xfs_qm_quotacheck(mp);
334 if (error) {
335 /* Quotacheck failed and disabled quotas. */
336 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
Donald Douwsma646d5bd2007-05-08 13:49:09 +1000339 /*
340 * If one type of quotas is off, then it will lose its
341 * quotachecked status, since we won't be doing accounting for
342 * that type anymore.
343 */
David Chinner53aa7912008-04-10 12:20:31 +1000344 if (!XFS_IS_UQUOTA_ON(mp))
Donald Douwsma646d5bd2007-05-08 13:49:09 +1000345 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
David Chinner53aa7912008-04-10 12:20:31 +1000346 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
Donald Douwsma646d5bd2007-05-08 13:49:09 +1000347 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
Nathan Scott155ffd02005-09-02 16:43:48 +1000348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 write_changes:
350 /*
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000351 * We actually don't have to acquire the m_sb_lock at all.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 * This can only be called from mount, and that's single threaded. XXX
353 */
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000354 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 sbf = mp->m_sb.sb_qflags;
356 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000357 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
359 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
360 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
361 /*
362 * We could only have been turning quotas off.
363 * We aren't in very good shape actually because
364 * the incore structures are convinced that quotas are
365 * off, but the on disk superblock doesn't know that !
366 */
367 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
Dave Chinner53487782011-03-07 10:05:35 +1100368 xfs_alert(mp, "%s: Superblock update failed!",
369 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 }
371 }
372
373 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100374 xfs_warn(mp, "Failed to initialize disk quotas.");
Christoph Hellwig7d095252009-06-08 15:33:32 +0200375 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377}
378
379/*
380 * Called from the vfsops layer.
381 */
Christoph Hellwige57481d2008-12-03 12:20:36 +0100382void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383xfs_qm_unmount_quotas(
384 xfs_mount_t *mp)
385{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 /*
387 * Release the dquots that root inode, et al might be holding,
388 * before we flush quotas and blow away the quotainfo structure.
389 */
390 ASSERT(mp->m_rootip);
391 xfs_qm_dqdetach(mp->m_rootip);
392 if (mp->m_rbmip)
393 xfs_qm_dqdetach(mp->m_rbmip);
394 if (mp->m_rsumip)
395 xfs_qm_dqdetach(mp->m_rsumip);
396
397 /*
Christoph Hellwige57481d2008-12-03 12:20:36 +0100398 * Release the quota inodes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 if (mp->m_quotainfo) {
Christoph Hellwige57481d2008-12-03 12:20:36 +0100401 if (mp->m_quotainfo->qi_uquotaip) {
402 IRELE(mp->m_quotainfo->qi_uquotaip);
403 mp->m_quotainfo->qi_uquotaip = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 }
Christoph Hellwige57481d2008-12-03 12:20:36 +0100405 if (mp->m_quotainfo->qi_gquotaip) {
406 IRELE(mp->m_quotainfo->qi_gquotaip);
407 mp->m_quotainfo->qi_gquotaip = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
409 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410}
411
412/*
413 * Flush all dquots of the given file system to disk. The dquots are
414 * _not_ purged from memory here, just their data written to disk.
415 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000416STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417xfs_qm_dqflush_all(
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000418 struct xfs_mount *mp,
419 int sync_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000421 struct xfs_quotainfo *q = mp->m_quotainfo;
422 int recl;
423 struct xfs_dquot *dqp;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000424 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000426 if (!q)
Jesper Juhl014c2542006-01-15 02:37:08 +0100427 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428again:
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000429 mutex_lock(&q->qi_dqlist_lock);
430 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 xfs_dqlock(dqp);
432 if (! XFS_DQ_IS_DIRTY(dqp)) {
433 xfs_dqunlock(dqp);
434 continue;
435 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 /* XXX a sentinel would be better */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000438 recl = q->qi_dqreclaims;
David Chinnere1f49cf2008-08-13 16:41:43 +1000439 if (!xfs_dqflock_nowait(dqp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 /*
441 * If we can't grab the flush lock then check
442 * to see if the dquot has been flushed delayed
443 * write. If so, grab its buffer and send it
444 * out immediately. We'll be able to acquire
445 * the flush lock when the I/O completes.
446 */
447 xfs_qm_dqflock_pushbuf_wait(dqp);
448 }
449 /*
450 * Let go of the mplist lock. We don't want to hold it
451 * across a disk write.
452 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000453 mutex_unlock(&q->qi_dqlist_lock);
Dave Chinner20026d92010-02-04 09:48:58 +1100454 error = xfs_qm_dqflush(dqp, sync_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 xfs_dqunlock(dqp);
456 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +0100457 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000459 mutex_lock(&q->qi_dqlist_lock);
460 if (recl != q->qi_dqreclaims) {
461 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 /* XXX restart limit */
463 goto again;
464 }
465 }
466
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000467 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 /* return ! busy */
Jesper Juhl014c2542006-01-15 02:37:08 +0100469 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470}
471/*
472 * Release the group dquot pointers the user dquots may be
473 * carrying around as a hint. mplist is locked on entry and exit.
474 */
475STATIC void
476xfs_qm_detach_gdquots(
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000477 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000479 struct xfs_quotainfo *q = mp->m_quotainfo;
480 struct xfs_dquot *dqp, *gdqp;
481 int nrecl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 again:
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000484 ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
485 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 xfs_dqlock(dqp);
487 if ((gdqp = dqp->q_gdquot)) {
488 xfs_dqlock(gdqp);
489 dqp->q_gdquot = NULL;
490 }
491 xfs_dqunlock(dqp);
492
493 if (gdqp) {
494 /*
495 * Can't hold the mplist lock across a dqput.
496 * XXXmust convert to marker based iterations here.
497 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000498 nrecl = q->qi_dqreclaims;
499 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 xfs_qm_dqput(gdqp);
501
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000502 mutex_lock(&q->qi_dqlist_lock);
503 if (nrecl != q->qi_dqreclaims)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 goto again;
505 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 }
507}
508
509/*
510 * Go through all the incore dquots of this file system and take them
511 * off the mplist and hashlist, if the dquot type matches the dqtype
512 * parameter. This is used when turning off quota accounting for
513 * users and/or groups, as well as when the filesystem is unmounting.
514 */
515STATIC int
516xfs_qm_dqpurge_int(
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000517 struct xfs_mount *mp,
518 uint flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000520 struct xfs_quotainfo *q = mp->m_quotainfo;
521 struct xfs_dquot *dqp, *n;
522 uint dqtype;
523 int nrecl;
524 int nmisses;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000526 if (!q)
Jesper Juhl014c2542006-01-15 02:37:08 +0100527 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
529 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000530 dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
532
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000533 mutex_lock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 /*
536 * In the first pass through all incore dquots of this filesystem,
537 * we release the group dquot pointers the user dquots may be
538 * carrying around as a hint. We need to do this irrespective of
539 * what's being turned off.
540 */
541 xfs_qm_detach_gdquots(mp);
542
543 again:
544 nmisses = 0;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000545 ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 /*
547 * Try to get rid of all of the unwanted dquots. The idea is to
548 * get them off mplist and hashlist, but leave them on freelist.
549 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000550 list_for_each_entry_safe(dqp, n, &q->qi_dqlist, q_mplist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 /*
552 * It's OK to look at the type without taking dqlock here.
553 * We're holding the mplist lock here, and that's needed for
554 * a dqreclaim.
555 */
Dave Chinner3a254042010-04-13 15:06:48 +1000556 if ((dqp->dq_flags & dqtype) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100559 if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000560 nrecl = q->qi_dqreclaims;
561 mutex_unlock(&q->qi_dqlist_lock);
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100562 mutex_lock(&dqp->q_hash->qh_lock);
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000563 mutex_lock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565 /*
566 * XXXTheoretically, we can get into a very long
567 * ping pong game here.
568 * No one can be adding dquots to the mplist at
569 * this point, but somebody might be taking things off.
570 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000571 if (nrecl != q->qi_dqreclaims) {
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100572 mutex_unlock(&dqp->q_hash->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 goto again;
574 }
575 }
576
577 /*
578 * Take the dquot off the mplist and hashlist. It may remain on
579 * freelist in INACTIVE state.
580 */
Denys Vlasenko4f0e8a92008-05-19 16:34:04 +1000581 nmisses += xfs_qm_dqpurge(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 }
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000583 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 return nmisses;
585}
586
587int
588xfs_qm_dqpurge_all(
589 xfs_mount_t *mp,
590 uint flags)
591{
592 int ndquots;
593
594 /*
595 * Purge the dquot cache.
596 * None of the dquots should really be busy at this point.
597 */
598 if (mp->m_quotainfo) {
599 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
600 delay(ndquots * 10);
601 }
602 }
603 return 0;
604}
605
606STATIC int
607xfs_qm_dqattach_one(
608 xfs_inode_t *ip,
609 xfs_dqid_t id,
610 uint type,
611 uint doalloc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 xfs_dquot_t *udqhint, /* hint */
613 xfs_dquot_t **IO_idqpp)
614{
615 xfs_dquot_t *dqp;
616 int error;
617
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000618 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 error = 0;
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100620
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 /*
622 * See if we already have it in the inode itself. IO_idqpp is
623 * &i_udquot or &i_gdquot. This made the code look weird, but
624 * made the logic a lot simpler.
625 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100626 dqp = *IO_idqpp;
627 if (dqp) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000628 trace_xfs_dqattach_found(dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100629 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 }
631
632 /*
633 * udqhint is the i_udquot field in inode, and is non-NULL only
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000634 * when the type arg is group/project. Its purpose is to save a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
636 * the user dquot.
637 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100638 if (udqhint) {
639 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 xfs_dqlock(udqhint);
641
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100642 /*
643 * No need to take dqlock to look at the id.
644 *
645 * The ID can't change until it gets reclaimed, and it won't
646 * be reclaimed as long as we have a ref from inode and we
647 * hold the ilock.
648 */
649 dqp = udqhint->q_gdquot;
650 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
651 xfs_dqlock(dqp);
652 XFS_DQHOLD(dqp);
653 ASSERT(*IO_idqpp == NULL);
654 *IO_idqpp = dqp;
655
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 xfs_dqunlock(dqp);
657 xfs_dqunlock(udqhint);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100658 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 }
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100660
661 /*
662 * We can't hold a dquot lock when we call the dqget code.
663 * We'll deadlock in no time, because of (not conforming to)
664 * lock ordering - the inodelock comes before any dquot lock,
665 * and we may drop and reacquire the ilock in xfs_qm_dqget().
666 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 xfs_dqunlock(udqhint);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100668 }
669
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 /*
671 * Find the dquot from somewhere. This bumps the
672 * reference count of dquot and returns it locked.
673 * This can return ENOENT if dquot didn't exist on
674 * disk and we didn't ask it to allocate;
675 * ESRCH if quotas got turned off suddenly.
676 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100677 error = xfs_qm_dqget(ip->i_mount, ip, id, type, XFS_QMOPT_DOWARN, &dqp);
678 if (error)
679 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000681 trace_xfs_dqattach_get(dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 /*
684 * dqget may have dropped and re-acquired the ilock, but it guarantees
685 * that the dquot returned is the one that should go in the inode.
686 */
687 *IO_idqpp = dqp;
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100688 xfs_dqunlock(dqp);
689 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690}
691
692
693/*
694 * Given a udquot and gdquot, attach a ptr to the group dquot in the
695 * udquot as a hint for future lookups. The idea sounds simple, but the
696 * execution isn't, because the udquot might have a group dquot attached
Nathan Scottc41564b2006-03-29 08:55:14 +1000697 * already and getting rid of that gets us into lock ordering constraints.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 * The process is complicated more by the fact that the dquots may or may not
699 * be locked on entry.
700 */
701STATIC void
702xfs_qm_dqattach_grouphint(
703 xfs_dquot_t *udq,
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100704 xfs_dquot_t *gdq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705{
706 xfs_dquot_t *tmp;
707
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100708 xfs_dqlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710 if ((tmp = udq->q_gdquot)) {
711 if (tmp == gdq) {
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100712 xfs_dqunlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 return;
714 }
715
716 udq->q_gdquot = NULL;
717 /*
718 * We can't keep any dqlocks when calling dqrele,
719 * because the freelist lock comes before dqlocks.
720 */
721 xfs_dqunlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 /*
723 * we took a hard reference once upon a time in dqget,
724 * so give it back when the udquot no longer points at it
725 * dqput() does the unlocking of the dquot.
726 */
727 xfs_qm_dqrele(tmp);
728
729 xfs_dqlock(udq);
730 xfs_dqlock(gdq);
731
732 } else {
733 ASSERT(XFS_DQ_IS_LOCKED(udq));
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100734 xfs_dqlock(gdq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 }
736
737 ASSERT(XFS_DQ_IS_LOCKED(udq));
738 ASSERT(XFS_DQ_IS_LOCKED(gdq));
739 /*
740 * Somebody could have attached a gdquot here,
741 * when we dropped the uqlock. If so, just do nothing.
742 */
743 if (udq->q_gdquot == NULL) {
744 XFS_DQHOLD(gdq);
745 udq->q_gdquot = gdq;
746 }
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100747
748 xfs_dqunlock(gdq);
749 xfs_dqunlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750}
751
752
753/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000754 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
755 * into account.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 * Inode may get unlocked and relocked in here, and the caller must deal with
758 * the consequences.
759 */
760int
Christoph Hellwig7d095252009-06-08 15:33:32 +0200761xfs_qm_dqattach_locked(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 xfs_inode_t *ip,
763 uint flags)
764{
765 xfs_mount_t *mp = ip->i_mount;
766 uint nquotas = 0;
767 int error = 0;
768
Christoph Hellwig7d095252009-06-08 15:33:32 +0200769 if (!XFS_IS_QUOTA_RUNNING(mp) ||
770 !XFS_IS_QUOTA_ON(mp) ||
771 !XFS_NOT_DQATTACHED(mp, ip) ||
772 ip->i_ino == mp->m_sb.sb_uquotino ||
773 ip->i_ino == mp->m_sb.sb_gquotino)
Jesper Juhl014c2542006-01-15 02:37:08 +0100774 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Christoph Hellwig7d095252009-06-08 15:33:32 +0200776 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 if (XFS_IS_UQUOTA_ON(mp)) {
779 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
780 flags & XFS_QMOPT_DQALLOC,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 NULL, &ip->i_udquot);
782 if (error)
783 goto done;
784 nquotas++;
785 }
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000786
787 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000788 if (XFS_IS_OQUOTA_ON(mp)) {
789 error = XFS_IS_GQUOTA_ON(mp) ?
790 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
791 flags & XFS_QMOPT_DQALLOC,
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000792 ip->i_udquot, &ip->i_gdquot) :
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000793 xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 flags & XFS_QMOPT_DQALLOC,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 ip->i_udquot, &ip->i_gdquot);
796 /*
797 * Don't worry about the udquot that we may have
798 * attached above. It'll get detached, if not already.
799 */
800 if (error)
801 goto done;
802 nquotas++;
803 }
804
805 /*
806 * Attach this group quota to the user quota as a hint.
807 * This WON'T, in general, result in a thrash.
808 */
809 if (nquotas == 2) {
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000810 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 ASSERT(ip->i_udquot);
812 ASSERT(ip->i_gdquot);
813
814 /*
815 * We may or may not have the i_udquot locked at this point,
816 * but this check is OK since we don't depend on the i_gdquot to
817 * be accurate 100% all the time. It is just a hint, and this
818 * will succeed in general.
819 */
820 if (ip->i_udquot->q_gdquot == ip->i_gdquot)
821 goto done;
822 /*
823 * Attach i_gdquot to the gdquot hint inside the i_udquot.
824 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100825 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 }
827
Christoph Hellwig7d095252009-06-08 15:33:32 +0200828 done:
Christoph Hellwigea15ab32011-07-13 13:43:50 +0200829#ifdef DEBUG
830 if (!error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 if (XFS_IS_UQUOTA_ON(mp))
832 ASSERT(ip->i_udquot);
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000833 if (XFS_IS_OQUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 ASSERT(ip->i_gdquot);
835 }
Christoph Hellwig7d095252009-06-08 15:33:32 +0200836 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837#endif
Christoph Hellwig7d095252009-06-08 15:33:32 +0200838 return error;
839}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Christoph Hellwig7d095252009-06-08 15:33:32 +0200841int
842xfs_qm_dqattach(
843 struct xfs_inode *ip,
844 uint flags)
845{
846 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
Christoph Hellwig7d095252009-06-08 15:33:32 +0200848 xfs_ilock(ip, XFS_ILOCK_EXCL);
849 error = xfs_qm_dqattach_locked(ip, flags);
850 xfs_iunlock(ip, XFS_ILOCK_EXCL);
851
Jesper Juhl014c2542006-01-15 02:37:08 +0100852 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853}
854
855/*
856 * Release dquots (and their references) if any.
857 * The inode should be locked EXCL except when this's called by
858 * xfs_ireclaim.
859 */
860void
861xfs_qm_dqdetach(
862 xfs_inode_t *ip)
863{
864 if (!(ip->i_udquot || ip->i_gdquot))
865 return;
866
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000867 trace_xfs_dquot_dqdetach(ip);
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
870 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 if (ip->i_udquot) {
872 xfs_qm_dqrele(ip->i_udquot);
873 ip->i_udquot = NULL;
874 }
875 if (ip->i_gdquot) {
876 xfs_qm_dqrele(ip->i_gdquot);
877 ip->i_gdquot = NULL;
878 }
879}
880
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881int
882xfs_qm_sync(
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000883 struct xfs_mount *mp,
884 int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000886 struct xfs_quotainfo *q = mp->m_quotainfo;
887 int recl, restarts;
888 struct xfs_dquot *dqp;
889 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
Christoph Hellwig7d095252009-06-08 15:33:32 +0200891 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Donald Douwsmad7577622007-11-23 16:27:42 +1100892 return 0;
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 restarts = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
896 again:
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000897 mutex_lock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 /*
899 * dqpurge_all() also takes the mplist lock and iterate thru all dquots
900 * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
901 * when we have the mplist lock, we know that dquots will be consistent
902 * as long as we have it locked.
903 */
Dave Chinner3a254042010-04-13 15:06:48 +1000904 if (!XFS_IS_QUOTA_ON(mp)) {
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000905 mutex_unlock(&q->qi_dqlist_lock);
Jesper Juhl014c2542006-01-15 02:37:08 +0100906 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 }
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000908 ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
909 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 /*
911 * If this is vfs_sync calling, then skip the dquots that
912 * don't 'seem' to be dirty. ie. don't acquire dqlock.
913 * This is very similar to what xfs_sync does with inodes.
914 */
Christoph Hellwig8b5403a2009-06-08 15:37:16 +0200915 if (flags & SYNC_TRYLOCK) {
916 if (!XFS_DQ_IS_DIRTY(dqp))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 continue;
Christoph Hellwig8b5403a2009-06-08 15:37:16 +0200918 if (!xfs_qm_dqlock_nowait(dqp))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 continue;
920 } else {
921 xfs_dqlock(dqp);
922 }
923
924 /*
925 * Now, find out for sure if this dquot is dirty or not.
926 */
927 if (! XFS_DQ_IS_DIRTY(dqp)) {
928 xfs_dqunlock(dqp);
929 continue;
930 }
931
932 /* XXX a sentinel would be better */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000933 recl = q->qi_dqreclaims;
David Chinnere1f49cf2008-08-13 16:41:43 +1000934 if (!xfs_dqflock_nowait(dqp)) {
Christoph Hellwig8b5403a2009-06-08 15:37:16 +0200935 if (flags & SYNC_TRYLOCK) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 xfs_dqunlock(dqp);
937 continue;
938 }
939 /*
940 * If we can't grab the flush lock then if the caller
Nathan Scottc41564b2006-03-29 08:55:14 +1000941 * really wanted us to give this our best shot, so
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 * see if we can give a push to the buffer before we wait
943 * on the flush lock. At this point, we know that
Nathan Scottc41564b2006-03-29 08:55:14 +1000944 * even though the dquot is being flushed,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 * it has (new) dirty data.
946 */
947 xfs_qm_dqflock_pushbuf_wait(dqp);
948 }
949 /*
950 * Let go of the mplist lock. We don't want to hold it
951 * across a disk write
952 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000953 mutex_unlock(&q->qi_dqlist_lock);
Dave Chinner20026d92010-02-04 09:48:58 +1100954 error = xfs_qm_dqflush(dqp, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 xfs_dqunlock(dqp);
956 if (error && XFS_FORCED_SHUTDOWN(mp))
Jesper Juhl014c2542006-01-15 02:37:08 +0100957 return 0; /* Need to prevent umount failure */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 else if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +0100959 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000961 mutex_lock(&q->qi_dqlist_lock);
962 if (recl != q->qi_dqreclaims) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
964 break;
965
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000966 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 goto again;
968 }
969 }
970
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000971 mutex_unlock(&q->qi_dqlist_lock);
Jesper Juhl014c2542006-01-15 02:37:08 +0100972 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973}
974
Christoph Hellwiga4edd1d2009-01-19 02:03:11 +0100975/*
976 * The hash chains and the mplist use the same xfs_dqhash structure as
977 * their list head, but we can take the mplist qh_lock and one of the
978 * hash qh_locks at the same time without any problem as they aren't
979 * related.
980 */
981static struct lock_class_key xfs_quota_mplist_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
983/*
984 * This initializes all the quota information that's kept in the
985 * mount structure
986 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000987STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988xfs_qm_init_quotainfo(
989 xfs_mount_t *mp)
990{
991 xfs_quotainfo_t *qinf;
992 int error;
993 xfs_dquot_t *dqp;
994
995 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
996
997 /*
998 * Tell XQM that we exist as soon as possible.
999 */
1000 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
Jesper Juhl014c2542006-01-15 02:37:08 +01001001 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 }
1003
1004 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
1005
1006 /*
1007 * See if quotainodes are setup, and if not, allocate them,
1008 * and change the superblock accordingly.
1009 */
1010 if ((error = xfs_qm_init_quotainos(mp))) {
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10001011 kmem_free(qinf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 mp->m_quotainfo = NULL;
Jesper Juhl014c2542006-01-15 02:37:08 +01001013 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 }
1015
Dave Chinner3a254042010-04-13 15:06:48 +10001016 INIT_LIST_HEAD(&qinf->qi_dqlist);
1017 mutex_init(&qinf->qi_dqlist_lock);
1018 lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class);
Christoph Hellwiga4edd1d2009-01-19 02:03:11 +01001019
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 qinf->qi_dqreclaims = 0;
1021
1022 /* mutex used to serialize quotaoffs */
Jes Sorensen794ee1b2006-01-09 15:59:21 -08001023 mutex_init(&qinf->qi_quotaofflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
1025 /* Precalc some constants */
1026 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1027 ASSERT(qinf->qi_dqchunklen);
1028 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
1029 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
1030
1031 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
1032
1033 /*
1034 * We try to get the limits from the superuser's limits fields.
1035 * This is quite hacky, but it is standard quota practice.
1036 * We look at the USR dquot with id == 0 first, but if user quotas
1037 * are not enabled we goto the GRP dquot with id == 0.
1038 * We don't really care to keep separate default limits for user
1039 * and group quotas, at least not at this point.
1040 */
1041 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001042 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
1043 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
1044 XFS_DQ_PROJ),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
1046 &dqp);
1047 if (! error) {
1048 xfs_disk_dquot_t *ddqp = &dqp->q_core;
1049
1050 /*
1051 * The warnings and timers set the grace period given to
1052 * a user or group before he or she can not perform any
1053 * more writing. If it is zero, a default is used.
1054 */
Christoph Hellwig1149d962005-11-02 15:01:12 +11001055 qinf->qi_btimelimit = ddqp->d_btimer ?
1056 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
1057 qinf->qi_itimelimit = ddqp->d_itimer ?
1058 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
1059 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
1060 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
1061 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
1062 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
1063 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
1064 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
1065 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
1066 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
1067 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
1068 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
1069 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
1070 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
1071 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
1072 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
1074 /*
1075 * We sent the XFS_QMOPT_DQSUSER flag to dqget because
1076 * we don't want this dquot cached. We haven't done a
1077 * quotacheck yet, and quotacheck doesn't like incore dquots.
1078 */
1079 xfs_qm_dqdestroy(dqp);
1080 } else {
1081 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
1082 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
1083 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
1084 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
1085 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
Nathan Scott06d10dd2005-06-21 15:48:47 +10001086 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 }
1088
Jesper Juhl014c2542006-01-15 02:37:08 +01001089 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090}
1091
1092
1093/*
1094 * Gets called when unmounting a filesystem or when all quotas get
1095 * turned off.
1096 * This purges the quota inodes, destroys locks and frees itself.
1097 */
1098void
1099xfs_qm_destroy_quotainfo(
1100 xfs_mount_t *mp)
1101{
1102 xfs_quotainfo_t *qi;
1103
1104 qi = mp->m_quotainfo;
1105 ASSERT(qi != NULL);
1106 ASSERT(xfs_Gqm != NULL);
1107
1108 /*
1109 * Release the reference that XQM kept, so that we know
1110 * when the XQM structure should be freed. We cannot assume
1111 * that xfs_Gqm is non-null after this point.
1112 */
1113 xfs_qm_rele_quotafs_ref(mp);
1114
Dave Chinner3a254042010-04-13 15:06:48 +10001115 ASSERT(list_empty(&qi->qi_dqlist));
1116 mutex_destroy(&qi->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117
1118 if (qi->qi_uquotaip) {
Christoph Hellwig26cc00212008-07-18 17:12:43 +10001119 IRELE(qi->qi_uquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 qi->qi_uquotaip = NULL; /* paranoia */
1121 }
1122 if (qi->qi_gquotaip) {
Christoph Hellwig26cc00212008-07-18 17:12:43 +10001123 IRELE(qi->qi_gquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 qi->qi_gquotaip = NULL;
1125 }
1126 mutex_destroy(&qi->qi_quotaofflock);
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10001127 kmem_free(qi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 mp->m_quotainfo = NULL;
1129}
1130
1131
1132
1133/* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
1134
1135/* ARGSUSED */
1136STATIC void
1137xfs_qm_list_init(
1138 xfs_dqlist_t *list,
1139 char *str,
1140 int n)
1141{
Jes Sorensen794ee1b2006-01-09 15:59:21 -08001142 mutex_init(&list->qh_lock);
Dave Chinnere6a81f12010-04-13 15:06:51 +10001143 INIT_LIST_HEAD(&list->qh_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 list->qh_version = 0;
1145 list->qh_nelems = 0;
1146}
1147
1148STATIC void
1149xfs_qm_list_destroy(
1150 xfs_dqlist_t *list)
1151{
1152 mutex_destroy(&(list->qh_lock));
1153}
1154
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155/*
1156 * Create an inode and return with a reference already taken, but unlocked
1157 * This is how we create quota inodes
1158 */
1159STATIC int
1160xfs_qm_qino_alloc(
1161 xfs_mount_t *mp,
1162 xfs_inode_t **ip,
1163 __int64_t sbfields,
1164 uint flags)
1165{
1166 xfs_trans_t *tp;
1167 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 int committed;
1169
Nathan Scott061f7202006-01-11 15:27:50 +11001170 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 if ((error = xfs_trans_reserve(tp,
1172 XFS_QM_QINOCREATE_SPACE_RES(mp),
1173 XFS_CREATE_LOG_RES(mp), 0,
1174 XFS_TRANS_PERM_LOG_RES,
1175 XFS_CREATE_LOG_COUNT))) {
1176 xfs_trans_cancel(tp, 0);
Jesper Juhl014c2542006-01-15 02:37:08 +01001177 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +00001180 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
1181 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1183 XFS_TRANS_ABORT);
Jesper Juhl014c2542006-01-15 02:37:08 +01001184 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 }
1186
1187 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 * Make the changes in the superblock, and log those too.
1189 * sbfields arg may contain fields other than *QUOTINO;
1190 * VERSIONNUM for example.
1191 */
Eric Sandeen3685c2a2007-10-11 17:42:32 +10001192 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 if (flags & XFS_QMOPT_SBVERSION) {
Eric Sandeen62118702008-03-06 13:44:28 +11001194 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1196 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
1197 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1198 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
1199
Eric Sandeen62118702008-03-06 13:44:28 +11001200 xfs_sb_version_addquota(&mp->m_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 mp->m_sb.sb_uquotino = NULLFSINO;
1202 mp->m_sb.sb_gquotino = NULLFSINO;
1203
1204 /* qflags will get updated _after_ quotacheck */
1205 mp->m_sb.sb_qflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 }
1207 if (flags & XFS_QMOPT_UQUOTA)
1208 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1209 else
1210 mp->m_sb.sb_gquotino = (*ip)->i_ino;
Eric Sandeen3685c2a2007-10-11 17:42:32 +10001211 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 xfs_mod_sb(tp, sbfields);
1213
Eric Sandeen1c72bf92007-05-08 13:48:42 +10001214 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
Dave Chinner53487782011-03-07 10:05:35 +11001215 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
Jesper Juhl014c2542006-01-15 02:37:08 +01001216 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 }
Jesper Juhl014c2542006-01-15 02:37:08 +01001218 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219}
1220
1221
David Chinner5b139732008-04-10 12:20:10 +10001222STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223xfs_qm_reset_dqcounts(
1224 xfs_mount_t *mp,
1225 xfs_buf_t *bp,
1226 xfs_dqid_t id,
1227 uint type)
1228{
1229 xfs_disk_dquot_t *ddq;
1230 int j;
1231
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001232 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 /*
1235 * Reset all counters and timers. They'll be
1236 * started afresh by xfs_qm_quotacheck.
1237 */
1238#ifdef DEBUG
1239 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1240 do_div(j, sizeof(xfs_dqblk_t));
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001241 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242#endif
Chandra Seetharaman62926042011-07-22 23:40:15 +00001243 ddq = bp->b_addr;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001244 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 /*
1246 * Do a sanity check, and if needed, repair the dqblk. Don't
1247 * output any warnings because it's perfectly possible to
Nathan Scottc41564b2006-03-29 08:55:14 +10001248 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 */
Dave Chinnera0fa2b62011-03-07 10:01:35 +11001250 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 "xfs_quotacheck");
Christoph Hellwig1149d962005-11-02 15:01:12 +11001252 ddq->d_bcount = 0;
1253 ddq->d_icount = 0;
1254 ddq->d_rtbcount = 0;
1255 ddq->d_btimer = 0;
1256 ddq->d_itimer = 0;
1257 ddq->d_rtbtimer = 0;
1258 ddq->d_bwarns = 0;
1259 ddq->d_iwarns = 0;
1260 ddq->d_rtbwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1262 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263}
1264
1265STATIC int
1266xfs_qm_dqiter_bufs(
1267 xfs_mount_t *mp,
1268 xfs_dqid_t firstid,
1269 xfs_fsblock_t bno,
1270 xfs_filblks_t blkcnt,
1271 uint flags)
1272{
1273 xfs_buf_t *bp;
1274 int error;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001275 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276
1277 ASSERT(blkcnt > 0);
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001278 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1279 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 error = 0;
1281
1282 /*
1283 * Blkcnt arg can be a very big number, and might even be
1284 * larger than the log itself. So, we have to break it up into
1285 * manageable-sized transactions.
1286 * Note that we don't start a permanent transaction here; we might
1287 * not be able to get a log reservation for the whole thing up front,
1288 * and we don't really care to either, because we just discard
1289 * everything if we were to crash in the middle of this loop.
1290 */
1291 while (blkcnt--) {
1292 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1293 XFS_FSB_TO_DADDR(mp, bno),
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001294 mp->m_quotainfo->qi_dqchunklen, 0, &bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 if (error)
1296 break;
1297
David Chinner5b139732008-04-10 12:20:10 +10001298 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
Christoph Hellwig61551f12011-08-23 08:28:06 +00001299 xfs_buf_delwri_queue(bp);
1300 xfs_buf_relse(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 /*
1302 * goto the next block.
1303 */
1304 bno++;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001305 firstid += mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 }
Jesper Juhl014c2542006-01-15 02:37:08 +01001307 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308}
1309
1310/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001311 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 * caller supplied function for every chunk of dquots that we find.
1313 */
1314STATIC int
1315xfs_qm_dqiterate(
1316 xfs_mount_t *mp,
1317 xfs_inode_t *qip,
1318 uint flags)
1319{
1320 xfs_bmbt_irec_t *map;
1321 int i, nmaps; /* number of map entries */
1322 int error; /* return value */
1323 xfs_fileoff_t lblkno;
1324 xfs_filblks_t maxlblkcnt;
1325 xfs_dqid_t firstid;
1326 xfs_fsblock_t rablkno;
1327 xfs_filblks_t rablkcnt;
1328
1329 error = 0;
1330 /*
Nathan Scottc41564b2006-03-29 08:55:14 +10001331 * This looks racy, but we can't keep an inode lock across a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 * trans_reserve. But, this gets called during quotacheck, and that
1333 * happens only at mount time which is single threaded.
1334 */
1335 if (qip->i_d.di_nblocks == 0)
Jesper Juhl014c2542006-01-15 02:37:08 +01001336 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
1338 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1339
1340 lblkno = 0;
1341 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1342 do {
1343 nmaps = XFS_DQITER_MAP_SIZE;
1344 /*
1345 * We aren't changing the inode itself. Just changing
1346 * some of its data. No new blocks are added here, and
1347 * the inode is never added to the transaction.
1348 */
1349 xfs_ilock(qip, XFS_ILOCK_SHARED);
1350 error = xfs_bmapi(NULL, qip, lblkno,
1351 maxlblkcnt - lblkno,
1352 XFS_BMAPI_METADATA,
1353 NULL,
Christoph Hellwigb4e91812010-06-23 18:11:15 +10001354 0, map, &nmaps, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1356 if (error)
1357 break;
1358
1359 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1360 for (i = 0; i < nmaps; i++) {
1361 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1362 ASSERT(map[i].br_blockcount);
1363
1364
1365 lblkno += map[i].br_blockcount;
1366
1367 if (map[i].br_startblock == HOLESTARTBLOCK)
1368 continue;
1369
1370 firstid = (xfs_dqid_t) map[i].br_startoff *
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001371 mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 /*
1373 * Do a read-ahead on the next extent.
1374 */
1375 if ((i+1 < nmaps) &&
1376 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1377 rablkcnt = map[i+1].br_blockcount;
1378 rablkno = map[i+1].br_startblock;
1379 while (rablkcnt--) {
Christoph Hellwig1a1a3e92010-10-06 18:41:18 +00001380 xfs_buf_readahead(mp->m_ddev_targp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 XFS_FSB_TO_DADDR(mp, rablkno),
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001382 mp->m_quotainfo->qi_dqchunklen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 rablkno++;
1384 }
1385 }
1386 /*
1387 * Iterate thru all the blks in the extent and
1388 * reset the counters of all the dquots inside them.
1389 */
1390 if ((error = xfs_qm_dqiter_bufs(mp,
1391 firstid,
1392 map[i].br_startblock,
1393 map[i].br_blockcount,
1394 flags))) {
1395 break;
1396 }
1397 }
1398
1399 if (error)
1400 break;
1401 } while (nmaps > 0);
1402
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10001403 kmem_free(map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
Jesper Juhl014c2542006-01-15 02:37:08 +01001405 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406}
1407
1408/*
1409 * Called by dqusage_adjust in doing a quotacheck.
Christoph Hellwig52fda112010-09-06 01:44:22 +00001410 *
1411 * Given the inode, and a dquot id this updates both the incore dqout as well
1412 * as the buffer copy. This is so that once the quotacheck is done, we can
1413 * just log all the buffers, as opposed to logging numerous updates to
1414 * individual dquots.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001416STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417xfs_qm_quotacheck_dqadjust(
Christoph Hellwig52fda112010-09-06 01:44:22 +00001418 struct xfs_inode *ip,
1419 xfs_dqid_t id,
1420 uint type,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 xfs_qcnt_t nblks,
1422 xfs_qcnt_t rtblks)
1423{
Christoph Hellwig52fda112010-09-06 01:44:22 +00001424 struct xfs_mount *mp = ip->i_mount;
1425 struct xfs_dquot *dqp;
1426 int error;
1427
1428 error = xfs_qm_dqget(mp, ip, id, type,
1429 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1430 if (error) {
1431 /*
1432 * Shouldn't be able to turn off quotas here.
1433 */
1434 ASSERT(error != ESRCH);
1435 ASSERT(error != ENOENT);
1436 return error;
1437 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001438
1439 trace_xfs_dqadjust(dqp);
1440
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 /*
1442 * Adjust the inode count and the block count to reflect this inode's
1443 * resource usage.
1444 */
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001445 be64_add_cpu(&dqp->q_core.d_icount, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 dqp->q_res_icount++;
1447 if (nblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001448 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 dqp->q_res_bcount += nblks;
1450 }
1451 if (rtblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001452 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 dqp->q_res_rtbcount += rtblks;
1454 }
1455
1456 /*
1457 * Set default limits, adjust timers (since we changed usages)
Christoph Hellwig191f8482010-04-20 17:01:53 +10001458 *
1459 * There are no timers for the default values set in the root dquot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 */
Christoph Hellwig191f8482010-04-20 17:01:53 +10001461 if (dqp->q_core.d_id) {
Christoph Hellwig52fda112010-09-06 01:44:22 +00001462 xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
1463 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 }
1465
1466 dqp->dq_flags |= XFS_DQ_DIRTY;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001467 xfs_qm_dqput(dqp);
1468 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469}
1470
1471STATIC int
1472xfs_qm_get_rtblks(
1473 xfs_inode_t *ip,
1474 xfs_qcnt_t *O_rtblks)
1475{
1476 xfs_filblks_t rtblks; /* total rt blks */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001477 xfs_extnum_t idx; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 xfs_ifork_t *ifp; /* inode fork pointer */
1479 xfs_extnum_t nextents; /* number of extent entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 int error;
1481
1482 ASSERT(XFS_IS_REALTIME_INODE(ip));
1483 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1484 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1485 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
Jesper Juhl014c2542006-01-15 02:37:08 +01001486 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 }
1488 rtblks = 0;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001489 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10001490 for (idx = 0; idx < nextents; idx++)
1491 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 *O_rtblks = (xfs_qcnt_t)rtblks;
Jesper Juhl014c2542006-01-15 02:37:08 +01001493 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494}
1495
1496/*
1497 * callback routine supplied to bulkstat(). Given an inumber, find its
1498 * dquots and update them to account for resources taken by that inode.
1499 */
1500/* ARGSUSED */
1501STATIC int
1502xfs_qm_dqusage_adjust(
1503 xfs_mount_t *mp, /* mount point for filesystem */
1504 xfs_ino_t ino, /* inode number to get data for */
1505 void __user *buffer, /* not used */
1506 int ubsize, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 int *ubused, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 int *res) /* result code value */
1509{
1510 xfs_inode_t *ip;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001511 xfs_qcnt_t nblks, rtblks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 int error;
1513
1514 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1515
1516 /*
1517 * rootino must have its resources accounted for, not so with the quota
1518 * inodes.
1519 */
1520 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1521 *res = BULKSTAT_RV_NOTHING;
1522 return XFS_ERROR(EINVAL);
1523 }
1524
1525 /*
1526 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1527 * interface expects the inode to be exclusively locked because that's
1528 * the case in all other instances. It's OK that we do this because
1529 * quotacheck is done only at mount time.
1530 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001531 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1532 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 *res = BULKSTAT_RV_NOTHING;
Jesper Juhl014c2542006-01-15 02:37:08 +01001534 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 }
1536
Christoph Hellwig52fda112010-09-06 01:44:22 +00001537 ASSERT(ip->i_delayed_blks == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538
Christoph Hellwig52fda112010-09-06 01:44:22 +00001539 if (XFS_IS_REALTIME_INODE(ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 /*
1541 * Walk thru the extent list and count the realtime blocks.
1542 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001543 error = xfs_qm_get_rtblks(ip, &rtblks);
1544 if (error)
1545 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
Christoph Hellwig52fda112010-09-06 01:44:22 +00001548 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
1550 /*
1551 * Add the (disk blocks and inode) resources occupied by this
1552 * inode to its dquots. We do this adjustment in the incore dquot,
1553 * and also copy the changes to its buffer.
1554 * We don't care about putting these changes in a transaction
1555 * envelope because if we crash in the middle of a 'quotacheck'
1556 * we have to start from the beginning anyway.
1557 * Once we're done, we'll log all the dquot bufs.
1558 *
Nathan Scottc41564b2006-03-29 08:55:14 +10001559 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1561 */
1562 if (XFS_IS_UQUOTA_ON(mp)) {
Christoph Hellwig52fda112010-09-06 01:44:22 +00001563 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1564 XFS_DQ_USER, nblks, rtblks);
1565 if (error)
1566 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
Christoph Hellwig52fda112010-09-06 01:44:22 +00001569 if (XFS_IS_GQUOTA_ON(mp)) {
1570 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1571 XFS_DQ_GROUP, nblks, rtblks);
1572 if (error)
1573 goto error0;
1574 }
1575
1576 if (XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001577 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
Christoph Hellwig52fda112010-09-06 01:44:22 +00001578 XFS_DQ_PROJ, nblks, rtblks);
1579 if (error)
1580 goto error0;
1581 }
1582
1583 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1584 IRELE(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 *res = BULKSTAT_RV_DIDONE;
Jesper Juhl014c2542006-01-15 02:37:08 +01001586 return 0;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001587
1588error0:
1589 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1590 IRELE(ip);
1591 *res = BULKSTAT_RV_GIVEUP;
1592 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593}
1594
1595/*
1596 * Walk thru all the filesystem inodes and construct a consistent view
1597 * of the disk quota world. If the quotacheck fails, disable quotas.
1598 */
1599int
1600xfs_qm_quotacheck(
1601 xfs_mount_t *mp)
1602{
1603 int done, count, error;
1604 xfs_ino_t lastino;
1605 size_t structsz;
1606 xfs_inode_t *uip, *gip;
1607 uint flags;
1608
1609 count = INT_MAX;
1610 structsz = 1;
1611 lastino = 0;
1612 flags = 0;
1613
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001614 ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1616
1617 /*
1618 * There should be no cached dquots. The (simplistic) quotacheck
1619 * algorithm doesn't like that.
1620 */
Dave Chinner3a254042010-04-13 15:06:48 +10001621 ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622
Dave Chinner0b932cc2011-03-07 10:08:35 +11001623 xfs_notice(mp, "Quotacheck needed: Please wait.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
1625 /*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001626 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 * their counters to zero. We need a clean slate.
1628 * We don't log our changes till later.
1629 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001630 uip = mp->m_quotainfo->qi_uquotaip;
1631 if (uip) {
1632 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA);
1633 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 goto error_return;
1635 flags |= XFS_UQUOTA_CHKD;
1636 }
1637
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001638 gip = mp->m_quotainfo->qi_gquotaip;
1639 if (gip) {
1640 error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1641 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1642 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 goto error_return;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001644 flags |= XFS_OQUOTA_CHKD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 }
1646
1647 do {
1648 /*
1649 * Iterate thru all the inodes in the file system,
1650 * adjusting the corresponding dquot counters in core.
1651 */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001652 error = xfs_bulkstat(mp, &lastino, &count,
1653 xfs_qm_dqusage_adjust,
1654 structsz, NULL, &done);
1655 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 break;
1657
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001658 } while (!done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659
1660 /*
David Chinner4b8879d2008-04-10 12:20:17 +10001661 * We've made all the changes that we need to make incore.
1662 * Flush them down to disk buffers if everything was updated
1663 * successfully.
1664 */
1665 if (!error)
Dave Chinner20026d92010-02-04 09:48:58 +11001666 error = xfs_qm_dqflush_all(mp, 0);
David Chinner4b8879d2008-04-10 12:20:17 +10001667
1668 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 * We can get this error if we couldn't do a dquot allocation inside
1670 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1671 * dirty dquots that might be cached, we just want to get rid of them
1672 * and turn quotaoff. The dquots won't be attached to any of the inodes
1673 * at this point (because we intentionally didn't in dqget_noattach).
1674 */
1675 if (error) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +10001676 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 goto error_return;
1678 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679
1680 /*
1681 * We didn't log anything, because if we crashed, we'll have to
1682 * start the quotacheck from scratch anyway. However, we must make
1683 * sure that our dquot changes are secure before we put the
1684 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1685 * flush.
1686 */
1687 XFS_bflush(mp->m_ddev_targp);
1688
1689 /*
1690 * If one type of quotas is off, then it will lose its
1691 * quotachecked status, since we won't be doing accounting for
1692 * that type anymore.
1693 */
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001694 mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 mp->m_qflags |= flags;
1696
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 error_return:
1698 if (error) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001699 xfs_warn(mp,
1700 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1701 error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 /*
1703 * We must turn off quotas.
1704 */
1705 ASSERT(mp->m_quotainfo != NULL);
1706 ASSERT(xfs_Gqm != NULL);
1707 xfs_qm_destroy_quotainfo(mp);
David Chinner31d55772008-04-10 12:20:38 +10001708 if (xfs_mount_reset_sbqflags(mp)) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001709 xfs_warn(mp,
1710 "Quotacheck: Failed to reset quota flags.");
David Chinner31d55772008-04-10 12:20:38 +10001711 }
Dave Chinner0b932cc2011-03-07 10:08:35 +11001712 } else
1713 xfs_notice(mp, "Quotacheck: Done.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 return (error);
1715}
1716
1717/*
1718 * This is called after the superblock has been read in and we're ready to
1719 * iget the quota inodes.
1720 */
1721STATIC int
1722xfs_qm_init_quotainos(
1723 xfs_mount_t *mp)
1724{
1725 xfs_inode_t *uip, *gip;
1726 int error;
1727 __int64_t sbflags;
1728 uint flags;
1729
1730 ASSERT(mp->m_quotainfo);
1731 uip = gip = NULL;
1732 sbflags = 0;
1733 flags = 0;
1734
1735 /*
1736 * Get the uquota and gquota inodes
1737 */
Eric Sandeen62118702008-03-06 13:44:28 +11001738 if (xfs_sb_version_hasquota(&mp->m_sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 if (XFS_IS_UQUOTA_ON(mp) &&
1740 mp->m_sb.sb_uquotino != NULLFSINO) {
1741 ASSERT(mp->m_sb.sb_uquotino > 0);
1742 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
Dave Chinner7b6259e2010-06-24 11:35:17 +10001743 0, 0, &uip)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 return XFS_ERROR(error);
1745 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001746 if (XFS_IS_OQUOTA_ON(mp) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 mp->m_sb.sb_gquotino != NULLFSINO) {
1748 ASSERT(mp->m_sb.sb_gquotino > 0);
1749 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
Dave Chinner7b6259e2010-06-24 11:35:17 +10001750 0, 0, &gip))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 if (uip)
Christoph Hellwig43355092008-03-27 18:01:08 +11001752 IRELE(uip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 return XFS_ERROR(error);
1754 }
1755 }
1756 } else {
1757 flags |= XFS_QMOPT_SBVERSION;
1758 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1759 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1760 }
1761
1762 /*
1763 * Create the two inodes, if they don't exist already. The changes
1764 * made above will get added to a transaction and logged in one of
1765 * the qino_alloc calls below. If the device is readonly,
1766 * temporarily switch to read-write to do this.
1767 */
1768 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1769 if ((error = xfs_qm_qino_alloc(mp, &uip,
1770 sbflags | XFS_SB_UQUOTINO,
1771 flags | XFS_QMOPT_UQUOTA)))
1772 return XFS_ERROR(error);
1773
1774 flags &= ~XFS_QMOPT_SBVERSION;
1775 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001776 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1777 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1778 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1779 error = xfs_qm_qino_alloc(mp, &gip,
1780 sbflags | XFS_SB_GQUOTINO, flags);
1781 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 if (uip)
Christoph Hellwig43355092008-03-27 18:01:08 +11001783 IRELE(uip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784
1785 return XFS_ERROR(error);
1786 }
1787 }
1788
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001789 mp->m_quotainfo->qi_uquotaip = uip;
1790 mp->m_quotainfo->qi_gquotaip = gip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791
Jesper Juhl014c2542006-01-15 02:37:08 +01001792 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793}
1794
1795
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796
1797/*
1798 * Just pop the least recently used dquot off the freelist and
1799 * recycle it. The returned dquot is locked.
1800 */
1801STATIC xfs_dquot_t *
1802xfs_qm_dqreclaim_one(void)
1803{
1804 xfs_dquot_t *dqpout;
1805 xfs_dquot_t *dqp;
1806 int restarts;
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001807 int startagain;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
1809 restarts = 0;
1810 dqpout = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811
1812 /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001813again:
1814 startagain = 0;
Dave Chinner3a8406f2010-04-13 15:06:52 +10001815 mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
Dave Chinner3a8406f2010-04-13 15:06:52 +10001817 list_for_each_entry(dqp, &xfs_Gqm->qm_dqfrlist, q_freelist) {
Dave Chinner3a254042010-04-13 15:06:48 +10001818 struct xfs_mount *mp = dqp->q_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819 xfs_dqlock(dqp);
1820
1821 /*
1822 * We are racing with dqlookup here. Naturally we don't
1823 * want to reclaim a dquot that lookup wants. We release the
1824 * freelist lock and start over, so that lookup will grab
1825 * both the dquot and the freelistlock.
1826 */
1827 if (dqp->dq_flags & XFS_DQ_WANT) {
1828 ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001829
1830 trace_xfs_dqreclaim_want(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001832 restarts++;
1833 startagain = 1;
1834 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 }
1836
1837 /*
1838 * If the dquot is inactive, we are assured that it is
1839 * not on the mplist or the hashlist, and that makes our
1840 * life easier.
1841 */
1842 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
Dave Chinner3a254042010-04-13 15:06:48 +10001843 ASSERT(mp == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
Dave Chinnere6a81f12010-04-13 15:06:51 +10001845 ASSERT(list_empty(&dqp->q_hashlist));
Dave Chinner3a254042010-04-13 15:06:48 +10001846 ASSERT(list_empty(&dqp->q_mplist));
Dave Chinner3a8406f2010-04-13 15:06:52 +10001847 list_del_init(&dqp->q_freelist);
1848 xfs_Gqm->qm_dqfrlist_cnt--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 dqpout = dqp;
1850 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001851 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 }
1853
1854 ASSERT(dqp->q_hash);
Dave Chinner3a254042010-04-13 15:06:48 +10001855 ASSERT(!list_empty(&dqp->q_mplist));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856
1857 /*
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001858 * Try to grab the flush lock. If this dquot is in the process
1859 * of getting flushed to disk, we don't want to reclaim it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 */
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001861 if (!xfs_dqflock_nowait(dqp))
1862 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863
1864 /*
1865 * We have the flush lock so we know that this is not in the
1866 * process of being flushed. So, if this is dirty, flush it
1867 * DELWRI so that we don't get a freelist infested with
1868 * dirty dquots.
1869 */
1870 if (XFS_DQ_IS_DIRTY(dqp)) {
David Chinner3c568362008-04-10 12:20:24 +10001871 int error;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001872
1873 trace_xfs_dqreclaim_dirty(dqp);
1874
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 /*
1876 * We flush it delayed write, so don't bother
1877 * releasing the freelist lock.
1878 */
Dave Chinner20026d92010-02-04 09:48:58 +11001879 error = xfs_qm_dqflush(dqp, 0);
David Chinner3c568362008-04-10 12:20:24 +10001880 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +11001881 xfs_warn(mp, "%s: dquot %p flush failed",
1882 __func__, dqp);
David Chinner3c568362008-04-10 12:20:24 +10001883 }
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001884 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 }
1886
Dave Chinner368e1362010-04-13 15:06:50 +10001887 /*
1888 * We're trying to get the hashlock out of order. This races
1889 * with dqlookup; so, we giveup and goto the next dquot if
1890 * we couldn't get the hashlock. This way, we won't starve
1891 * a dqlookup process that holds the hashlock that is
1892 * waiting for the freelist lock.
1893 */
1894 if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
1895 restarts++;
1896 goto dqfunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 }
1898
Dave Chinner368e1362010-04-13 15:06:50 +10001899 /*
1900 * This races with dquot allocation code as well as dqflush_all
1901 * and reclaim code. So, if we failed to grab the mplist lock,
1902 * giveup everything and start over.
1903 */
1904 if (!mutex_trylock(&mp->m_quotainfo->qi_dqlist_lock)) {
1905 restarts++;
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001906 startagain = 1;
1907 goto qhunlock;
Dave Chinner368e1362010-04-13 15:06:50 +10001908 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001909
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 ASSERT(dqp->q_nrefs == 0);
Dave Chinner3a254042010-04-13 15:06:48 +10001911 list_del_init(&dqp->q_mplist);
1912 mp->m_quotainfo->qi_dquots--;
1913 mp->m_quotainfo->qi_dqreclaims++;
Dave Chinnere6a81f12010-04-13 15:06:51 +10001914 list_del_init(&dqp->q_hashlist);
1915 dqp->q_hash->qh_version++;
Dave Chinner3a8406f2010-04-13 15:06:52 +10001916 list_del_init(&dqp->q_freelist);
1917 xfs_Gqm->qm_dqfrlist_cnt--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 dqpout = dqp;
Dave Chinner3a254042010-04-13 15:06:48 +10001919 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001920qhunlock:
Dave Chinner368e1362010-04-13 15:06:50 +10001921 mutex_unlock(&dqp->q_hash->qh_lock);
1922dqfunlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 xfs_dqfunlock(dqp);
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001924dqunlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 xfs_dqunlock(dqp);
1926 if (dqpout)
1927 break;
Dave Chinner368e1362010-04-13 15:06:50 +10001928 if (restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001929 break;
1930 if (startagain) {
1931 mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
1932 goto again;
1933 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 }
Dave Chinner3a8406f2010-04-13 15:06:52 +10001935 mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
Jesper Juhl014c2542006-01-15 02:37:08 +01001936 return dqpout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937}
1938
Dave Chinner368e1362010-04-13 15:06:50 +10001939/*
1940 * Traverse the freelist of dquots and attempt to reclaim a maximum of
1941 * 'howmany' dquots. This operation races with dqlookup(), and attempts to
1942 * favor the lookup function ...
1943 */
1944STATIC int
1945xfs_qm_shake_freelist(
1946 int howmany)
1947{
1948 int nreclaimed = 0;
1949 xfs_dquot_t *dqp;
1950
1951 if (howmany <= 0)
1952 return 0;
1953
1954 while (nreclaimed < howmany) {
1955 dqp = xfs_qm_dqreclaim_one();
1956 if (!dqp)
1957 return nreclaimed;
1958 xfs_qm_dqdestroy(dqp);
1959 nreclaimed++;
1960 }
1961 return nreclaimed;
1962}
1963
1964/*
1965 * The kmem_shake interface is invoked when memory is running low.
1966 */
1967/* ARGSUSED */
1968STATIC int
Dave Chinner7f8275d2010-07-19 14:56:17 +10001969xfs_qm_shake(
1970 struct shrinker *shrink,
Ying Han1495f232011-05-24 17:12:27 -07001971 struct shrink_control *sc)
Dave Chinner368e1362010-04-13 15:06:50 +10001972{
1973 int ndqused, nfree, n;
Ying Han1495f232011-05-24 17:12:27 -07001974 gfp_t gfp_mask = sc->gfp_mask;
Dave Chinner368e1362010-04-13 15:06:50 +10001975
1976 if (!kmem_shake_allow(gfp_mask))
1977 return 0;
1978 if (!xfs_Gqm)
1979 return 0;
1980
Dave Chinner3a8406f2010-04-13 15:06:52 +10001981 nfree = xfs_Gqm->qm_dqfrlist_cnt; /* free dquots */
Dave Chinner368e1362010-04-13 15:06:50 +10001982 /* incore dquots in all f/s's */
1983 ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
1984
1985 ASSERT(ndqused >= 0);
1986
1987 if (nfree <= ndqused && nfree < ndquot)
1988 return 0;
1989
1990 ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
1991 n = nfree - ndqused - ndquot; /* # over target */
1992
1993 return xfs_qm_shake_freelist(MAX(nfree, n));
1994}
1995
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996
1997/*------------------------------------------------------------------*/
1998
1999/*
2000 * Return a new incore dquot. Depending on the number of
2001 * dquots in the system, we either allocate a new one on the kernel heap,
2002 * or reclaim a free one.
2003 * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
2004 * to reclaim an existing one from the freelist.
2005 */
2006boolean_t
2007xfs_qm_dqalloc_incore(
2008 xfs_dquot_t **O_dqpp)
2009{
2010 xfs_dquot_t *dqp;
2011
2012 /*
2013 * Check against high water mark to see if we want to pop
2014 * a nincompoop dquot off the freelist.
2015 */
2016 if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
2017 /*
2018 * Try to recycle a dquot from the freelist.
2019 */
2020 if ((dqp = xfs_qm_dqreclaim_one())) {
2021 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
2022 /*
2023 * Just zero the core here. The rest will get
2024 * reinitialized by caller. XXX we shouldn't even
2025 * do this zero ...
2026 */
2027 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
2028 *O_dqpp = dqp;
Jesper Juhl014c2542006-01-15 02:37:08 +01002029 return B_FALSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030 }
2031 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
2032 }
2033
2034 /*
2035 * Allocate a brand new dquot on the kernel heap and return it
2036 * to the caller to initialize.
2037 */
2038 ASSERT(xfs_Gqm->qm_dqzone != NULL);
2039 *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
2040 atomic_inc(&xfs_Gqm->qm_totaldquots);
2041
Jesper Juhl014c2542006-01-15 02:37:08 +01002042 return B_TRUE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043}
2044
2045
2046/*
2047 * Start a transaction and write the incore superblock changes to
2048 * disk. flags parameter indicates which fields have changed.
2049 */
2050int
2051xfs_qm_write_sb_changes(
2052 xfs_mount_t *mp,
2053 __int64_t flags)
2054{
2055 xfs_trans_t *tp;
2056 int error;
2057
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
2059 if ((error = xfs_trans_reserve(tp, 0,
2060 mp->m_sb.sb_sectsize + 128, 0,
2061 0,
2062 XFS_DEFAULT_LOG_COUNT))) {
2063 xfs_trans_cancel(tp, 0);
Jesper Juhl014c2542006-01-15 02:37:08 +01002064 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 }
2066
2067 xfs_mod_sb(tp, flags);
David Chinnere5720ee2008-04-10 12:21:18 +10002068 error = xfs_trans_commit(tp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
David Chinnere5720ee2008-04-10 12:21:18 +10002070 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071}
2072
2073
2074/* --------------- utility functions for vnodeops ---------------- */
2075
2076
2077/*
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +00002078 * Given an inode, a uid, gid and prid make sure that we have
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 * allocated relevant dquot(s) on disk, and that we won't exceed inode
2080 * quotas by creating this file.
2081 * This also attaches dquot(s) to the given inode after locking it,
2082 * and returns the dquots corresponding to the uid and/or gid.
2083 *
2084 * in : inode (unlocked)
2085 * out : udquot, gdquot with references taken and unlocked
2086 */
2087int
2088xfs_qm_vop_dqalloc(
Christoph Hellwig7d095252009-06-08 15:33:32 +02002089 struct xfs_inode *ip,
2090 uid_t uid,
2091 gid_t gid,
2092 prid_t prid,
2093 uint flags,
2094 struct xfs_dquot **O_udqpp,
2095 struct xfs_dquot **O_gdqpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002097 struct xfs_mount *mp = ip->i_mount;
2098 struct xfs_dquot *uq, *gq;
2099 int error;
2100 uint lockflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101
Christoph Hellwig7d095252009-06-08 15:33:32 +02002102 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 return 0;
2104
2105 lockflags = XFS_ILOCK_EXCL;
2106 xfs_ilock(ip, lockflags);
2107
Christoph Hellwigbd186aa2007-08-30 17:21:12 +10002108 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109 gid = ip->i_d.di_gid;
2110
2111 /*
2112 * Attach the dquot(s) to this inode, doing a dquot allocation
2113 * if necessary. The dquot(s) will not be locked.
2114 */
2115 if (XFS_NOT_DQATTACHED(mp, ip)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02002116 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
2117 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 xfs_iunlock(ip, lockflags);
Jesper Juhl014c2542006-01-15 02:37:08 +01002119 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 }
2121 }
2122
2123 uq = gq = NULL;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002124 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125 if (ip->i_d.di_uid != uid) {
2126 /*
2127 * What we need is the dquot that has this uid, and
2128 * if we send the inode to dqget, the uid of the inode
2129 * takes priority over what's sent in the uid argument.
2130 * We must unlock inode here before calling dqget if
2131 * we're not sending the inode, because otherwise
2132 * we'll deadlock by doing trans_reserve while
2133 * holding ilock.
2134 */
2135 xfs_iunlock(ip, lockflags);
2136 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
2137 XFS_DQ_USER,
2138 XFS_QMOPT_DQALLOC |
2139 XFS_QMOPT_DOWARN,
2140 &uq))) {
2141 ASSERT(error != ENOENT);
Jesper Juhl014c2542006-01-15 02:37:08 +01002142 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 }
2144 /*
2145 * Get the ilock in the right order.
2146 */
2147 xfs_dqunlock(uq);
2148 lockflags = XFS_ILOCK_SHARED;
2149 xfs_ilock(ip, lockflags);
2150 } else {
2151 /*
2152 * Take an extra reference, because we'll return
2153 * this to caller
2154 */
2155 ASSERT(ip->i_udquot);
2156 uq = ip->i_udquot;
2157 xfs_dqlock(uq);
2158 XFS_DQHOLD(uq);
2159 xfs_dqunlock(uq);
2160 }
2161 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002162 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 if (ip->i_d.di_gid != gid) {
2164 xfs_iunlock(ip, lockflags);
2165 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
2166 XFS_DQ_GROUP,
2167 XFS_QMOPT_DQALLOC |
2168 XFS_QMOPT_DOWARN,
2169 &gq))) {
2170 if (uq)
2171 xfs_qm_dqrele(uq);
2172 ASSERT(error != ENOENT);
Jesper Juhl014c2542006-01-15 02:37:08 +01002173 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174 }
2175 xfs_dqunlock(gq);
2176 lockflags = XFS_ILOCK_SHARED;
2177 xfs_ilock(ip, lockflags);
2178 } else {
2179 ASSERT(ip->i_gdquot);
2180 gq = ip->i_gdquot;
2181 xfs_dqlock(gq);
2182 XFS_DQHOLD(gq);
2183 xfs_dqunlock(gq);
2184 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002185 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00002186 if (xfs_get_projid(ip) != prid) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002187 xfs_iunlock(ip, lockflags);
2188 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
2189 XFS_DQ_PROJ,
2190 XFS_QMOPT_DQALLOC |
2191 XFS_QMOPT_DOWARN,
2192 &gq))) {
2193 if (uq)
2194 xfs_qm_dqrele(uq);
2195 ASSERT(error != ENOENT);
2196 return (error);
2197 }
2198 xfs_dqunlock(gq);
2199 lockflags = XFS_ILOCK_SHARED;
2200 xfs_ilock(ip, lockflags);
2201 } else {
2202 ASSERT(ip->i_gdquot);
2203 gq = ip->i_gdquot;
2204 xfs_dqlock(gq);
2205 XFS_DQHOLD(gq);
2206 xfs_dqunlock(gq);
2207 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 }
2209 if (uq)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00002210 trace_xfs_dquot_dqalloc(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211
2212 xfs_iunlock(ip, lockflags);
2213 if (O_udqpp)
2214 *O_udqpp = uq;
2215 else if (uq)
2216 xfs_qm_dqrele(uq);
2217 if (O_gdqpp)
2218 *O_gdqpp = gq;
2219 else if (gq)
2220 xfs_qm_dqrele(gq);
Jesper Juhl014c2542006-01-15 02:37:08 +01002221 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222}
2223
2224/*
2225 * Actually transfer ownership, and do dquot modifications.
2226 * These were already reserved.
2227 */
2228xfs_dquot_t *
2229xfs_qm_vop_chown(
2230 xfs_trans_t *tp,
2231 xfs_inode_t *ip,
2232 xfs_dquot_t **IO_olddq,
2233 xfs_dquot_t *newdq)
2234{
2235 xfs_dquot_t *prevdq;
Nathan Scott06d10dd2005-06-21 15:48:47 +10002236 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
2237 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
2238
Christoph Hellwig7d095252009-06-08 15:33:32 +02002239
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10002240 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
2242
2243 /* old dquot */
2244 prevdq = *IO_olddq;
2245 ASSERT(prevdq);
2246 ASSERT(prevdq != newdq);
2247
Nathan Scott06d10dd2005-06-21 15:48:47 +10002248 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
2249 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250
2251 /* the sparkling new dquot */
Nathan Scott06d10dd2005-06-21 15:48:47 +10002252 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
2253 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254
2255 /*
2256 * Take an extra reference, because the inode
2257 * is going to keep this dquot pointer even
2258 * after the trans_commit.
2259 */
2260 xfs_dqlock(newdq);
2261 XFS_DQHOLD(newdq);
2262 xfs_dqunlock(newdq);
2263 *IO_olddq = newdq;
2264
Jesper Juhl014c2542006-01-15 02:37:08 +01002265 return prevdq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266}
2267
2268/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002269 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270 */
2271int
2272xfs_qm_vop_chown_reserve(
2273 xfs_trans_t *tp,
2274 xfs_inode_t *ip,
2275 xfs_dquot_t *udqp,
2276 xfs_dquot_t *gdqp,
2277 uint flags)
2278{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002279 xfs_mount_t *mp = ip->i_mount;
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002280 uint delblks, blkflags, prjflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002282 int error;
2283
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10002285 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2287
2288 delblks = ip->i_delayed_blks;
2289 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
Nathan Scott06d10dd2005-06-21 15:48:47 +10002290 blkflags = XFS_IS_REALTIME_INODE(ip) ?
2291 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292
2293 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
Christoph Hellwig1149d962005-11-02 15:01:12 +11002294 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 delblksudq = udqp;
2296 /*
2297 * If there are delayed allocation blocks, then we have to
2298 * unreserve those from the old dquot, and add them to the
2299 * new dquot.
2300 */
2301 if (delblks) {
2302 ASSERT(ip->i_udquot);
2303 unresudq = ip->i_udquot;
2304 }
2305 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002306 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002307 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00002308 xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002309 prjflags = XFS_QMOPT_ENOSPC;
2310
2311 if (prjflags ||
2312 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
2313 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002314 delblksgdq = gdqp;
2315 if (delblks) {
2316 ASSERT(ip->i_gdquot);
2317 unresgdq = ip->i_gdquot;
2318 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 }
2320 }
2321
2322 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2323 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002324 flags | blkflags | prjflags)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325 return (error);
2326
2327 /*
2328 * Do the delayed blks reservations/unreservations now. Since, these
2329 * are done without the help of a transaction, if a reservation fails
2330 * its previous reservations won't be automatically undone by trans
2331 * code. So, we have to do it manually here.
2332 */
2333 if (delblks) {
2334 /*
2335 * Do the reservations first. Unreservation can't fail.
2336 */
2337 ASSERT(delblksudq || delblksgdq);
2338 ASSERT(unresudq || unresgdq);
2339 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2340 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002341 flags | blkflags | prjflags)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342 return (error);
2343 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2344 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
Nathan Scott06d10dd2005-06-21 15:48:47 +10002345 blkflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346 }
2347
2348 return (0);
2349}
2350
2351int
2352xfs_qm_vop_rename_dqattach(
Christoph Hellwig7d095252009-06-08 15:33:32 +02002353 struct xfs_inode **i_tab)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002355 struct xfs_mount *mp = i_tab[0]->i_mount;
2356 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357
Christoph Hellwig7d095252009-06-08 15:33:32 +02002358 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Jesper Juhl014c2542006-01-15 02:37:08 +01002359 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360
Christoph Hellwig7d095252009-06-08 15:33:32 +02002361 for (i = 0; (i < 4 && i_tab[i]); i++) {
2362 struct xfs_inode *ip = i_tab[i];
2363 int error;
2364
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 /*
2366 * Watch out for duplicate entries in the table.
2367 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02002368 if (i == 0 || ip != i_tab[i-1]) {
2369 if (XFS_NOT_DQATTACHED(mp, ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370 error = xfs_qm_dqattach(ip, 0);
2371 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +01002372 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 }
2374 }
2375 }
Jesper Juhl014c2542006-01-15 02:37:08 +01002376 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377}
2378
2379void
Christoph Hellwig7d095252009-06-08 15:33:32 +02002380xfs_qm_vop_create_dqattach(
2381 struct xfs_trans *tp,
2382 struct xfs_inode *ip,
2383 struct xfs_dquot *udqp,
2384 struct xfs_dquot *gdqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002386 struct xfs_mount *mp = tp->t_mountp;
2387
2388 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389 return;
2390
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10002391 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig7d095252009-06-08 15:33:32 +02002392 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393
2394 if (udqp) {
2395 xfs_dqlock(udqp);
2396 XFS_DQHOLD(udqp);
2397 xfs_dqunlock(udqp);
2398 ASSERT(ip->i_udquot == NULL);
2399 ip->i_udquot = udqp;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002400 ASSERT(XFS_IS_UQUOTA_ON(mp));
Christoph Hellwig1149d962005-11-02 15:01:12 +11002401 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2403 }
2404 if (gdqp) {
2405 xfs_dqlock(gdqp);
2406 XFS_DQHOLD(gdqp);
2407 xfs_dqunlock(gdqp);
2408 ASSERT(ip->i_gdquot == NULL);
2409 ip->i_gdquot = gdqp;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002410 ASSERT(XFS_IS_OQUOTA_ON(mp));
2411 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00002412 ip->i_d.di_gid : xfs_get_projid(ip)) ==
Nathan Scottee2a4f72006-01-11 15:33:36 +11002413 be32_to_cpu(gdqp->q_core.d_id));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2415 }
2416}
2417