blob: f418731e90f415cde2a4815fcb399949a4fdcdcc [file] [log] [blame]
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{
157 int hsize, i;
158
159 ASSERT(xqm != NULL);
160 ASSERT(xqm->qm_nrefs == 0);
Christoph Hellwig80a376b2011-12-06 21:58:16 +0000161
Rusty Russell8e1f9362007-07-17 04:03:17 -0700162 unregister_shrinker(&xfs_qm_shaker);
Christoph Hellwig80a376b2011-12-06 21:58:16 +0000163
164 mutex_lock(&xqm->qm_dqfrlist_lock);
165 ASSERT(list_empty(&xqm->qm_dqfrlist));
166 mutex_unlock(&xqm->qm_dqfrlist_lock);
167
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 hsize = xqm->qm_dqhashmask + 1;
169 for (i = 0; i < hsize; i++) {
170 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
171 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
172 }
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000173 kmem_free_large(xqm->qm_usr_dqhtable);
174 kmem_free_large(xqm->qm_grp_dqhtable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 xqm->qm_usr_dqhtable = NULL;
176 xqm->qm_grp_dqhtable = NULL;
177 xqm->qm_dqhashmask = 0;
Dave Chinner3a8406f2010-04-13 15:06:52 +1000178
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000179 kmem_free(xqm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180}
181
182/*
183 * Called at mount time to let XQM know that another file system is
184 * starting quotas. This isn't crucial information as the individual mount
185 * structures are pretty independent, but it helps the XQM keep a
186 * global view of what's going on.
187 */
188/* ARGSUSED */
189STATIC int
190xfs_qm_hold_quotafs_ref(
191 struct xfs_mount *mp)
192{
193 /*
194 * Need to lock the xfs_Gqm structure for things like this. For example,
195 * the structure could disappear between the entry to this routine and
196 * a HOLD operation if not locked.
197 */
Christoph Hellwige2494582009-02-09 08:38:39 +0100198 mutex_lock(&xfs_Gqm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000200 if (!xfs_Gqm) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 xfs_Gqm = xfs_Gqm_init();
Julia Lawall38e712a2010-05-26 15:57:23 +0000202 if (!xfs_Gqm) {
203 mutex_unlock(&xfs_Gqm_lock);
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000204 return ENOMEM;
Julia Lawall38e712a2010-05-26 15:57:23 +0000205 }
Christoph Hellwigbdfb0432010-01-20 21:55:30 +0000206 }
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 /*
209 * We can keep a list of all filesystems with quotas mounted for
210 * debugging and statistical purposes, but ...
211 * Just take a reference and get out.
212 */
Christoph Hellwige2494582009-02-09 08:38:39 +0100213 xfs_Gqm->qm_nrefs++;
214 mutex_unlock(&xfs_Gqm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216 return 0;
217}
218
219
220/*
221 * Release the reference that a filesystem took at mount time,
222 * so that we know when we need to destroy the entire quota manager.
223 */
224/* ARGSUSED */
225STATIC void
226xfs_qm_rele_quotafs_ref(
227 struct xfs_mount *mp)
228{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 ASSERT(xfs_Gqm);
230 ASSERT(xfs_Gqm->qm_nrefs > 0);
231
232 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
234 * be restarted.
235 */
Christoph Hellwige2494582009-02-09 08:38:39 +0100236 mutex_lock(&xfs_Gqm_lock);
237 if (--xfs_Gqm->qm_nrefs == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 xfs_qm_destroy(xfs_Gqm);
239 xfs_Gqm = NULL;
240 }
Christoph Hellwige2494582009-02-09 08:38:39 +0100241 mutex_unlock(&xfs_Gqm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242}
243
244/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 * Just destroy the quotainfo structure.
246 */
247void
Christoph Hellwig7d095252009-06-08 15:33:32 +0200248xfs_qm_unmount(
249 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250{
Christoph Hellwig7d095252009-06-08 15:33:32 +0200251 if (mp->m_quotainfo) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +1000252 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 xfs_qm_destroy_quotainfo(mp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200254 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255}
256
257
258/*
259 * This is called from xfs_mountfs to start quotas and initialize all
260 * necessary data structures like quotainfo. This is also responsible for
261 * running a quotacheck as necessary. We are guaranteed that the superblock
262 * is consistently read in at this point.
David Chinner53aa7912008-04-10 12:20:31 +1000263 *
264 * If we fail here, the mount will continue with quota turned off. We don't
265 * need to inidicate success or failure at all.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 */
David Chinner53aa7912008-04-10 12:20:31 +1000267void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268xfs_qm_mount_quotas(
Christoph Hellwig42490232008-08-13 16:49:32 +1000269 xfs_mount_t *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 int error = 0;
272 uint sbf;
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 /*
275 * If quotas on realtime volumes is not supported, we disable
276 * quotas immediately.
277 */
278 if (mp->m_sb.sb_rextents) {
Dave Chinner0b932cc2011-03-07 10:08:35 +1100279 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 mp->m_qflags = 0;
281 goto write_changes;
282 }
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
Nathan Scott155ffd02005-09-02 16:43:48 +1000285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 /*
287 * Allocate the quotainfo structure inside the mount struct, and
288 * create quotainode(s), and change/rev superblock if necessary.
289 */
David Chinner53aa7912008-04-10 12:20:31 +1000290 error = xfs_qm_init_quotainfo(mp);
291 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 /*
293 * We must turn off quotas.
294 */
295 ASSERT(mp->m_quotainfo == NULL);
296 mp->m_qflags = 0;
297 goto write_changes;
298 }
299 /*
300 * If any of the quotas are not consistent, do a quotacheck.
301 */
Christoph Hellwig42490232008-08-13 16:49:32 +1000302 if (XFS_QM_NEED_QUOTACHECK(mp)) {
David Chinner53aa7912008-04-10 12:20:31 +1000303 error = xfs_qm_quotacheck(mp);
304 if (error) {
305 /* Quotacheck failed and disabled quotas. */
306 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
Donald Douwsma646d5bd2007-05-08 13:49:09 +1000309 /*
310 * If one type of quotas is off, then it will lose its
311 * quotachecked status, since we won't be doing accounting for
312 * that type anymore.
313 */
David Chinner53aa7912008-04-10 12:20:31 +1000314 if (!XFS_IS_UQUOTA_ON(mp))
Donald Douwsma646d5bd2007-05-08 13:49:09 +1000315 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
David Chinner53aa7912008-04-10 12:20:31 +1000316 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
Donald Douwsma646d5bd2007-05-08 13:49:09 +1000317 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
Nathan Scott155ffd02005-09-02 16:43:48 +1000318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 write_changes:
320 /*
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000321 * We actually don't have to acquire the m_sb_lock at all.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 * This can only be called from mount, and that's single threaded. XXX
323 */
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000324 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 sbf = mp->m_sb.sb_qflags;
326 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000327 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
330 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
331 /*
332 * We could only have been turning quotas off.
333 * We aren't in very good shape actually because
334 * the incore structures are convinced that quotas are
335 * off, but the on disk superblock doesn't know that !
336 */
337 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
Dave Chinner53487782011-03-07 10:05:35 +1100338 xfs_alert(mp, "%s: Superblock update failed!",
339 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 }
341 }
342
343 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100344 xfs_warn(mp, "Failed to initialize disk quotas.");
Christoph Hellwig7d095252009-06-08 15:33:32 +0200345 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347}
348
349/*
350 * Called from the vfsops layer.
351 */
Christoph Hellwige57481d2008-12-03 12:20:36 +0100352void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353xfs_qm_unmount_quotas(
354 xfs_mount_t *mp)
355{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 /*
357 * Release the dquots that root inode, et al might be holding,
358 * before we flush quotas and blow away the quotainfo structure.
359 */
360 ASSERT(mp->m_rootip);
361 xfs_qm_dqdetach(mp->m_rootip);
362 if (mp->m_rbmip)
363 xfs_qm_dqdetach(mp->m_rbmip);
364 if (mp->m_rsumip)
365 xfs_qm_dqdetach(mp->m_rsumip);
366
367 /*
Christoph Hellwige57481d2008-12-03 12:20:36 +0100368 * Release the quota inodes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 if (mp->m_quotainfo) {
Christoph Hellwige57481d2008-12-03 12:20:36 +0100371 if (mp->m_quotainfo->qi_uquotaip) {
372 IRELE(mp->m_quotainfo->qi_uquotaip);
373 mp->m_quotainfo->qi_uquotaip = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
Christoph Hellwige57481d2008-12-03 12:20:36 +0100375 if (mp->m_quotainfo->qi_gquotaip) {
376 IRELE(mp->m_quotainfo->qi_gquotaip);
377 mp->m_quotainfo->qi_gquotaip = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 }
379 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380}
381
382/*
383 * Flush all dquots of the given file system to disk. The dquots are
384 * _not_ purged from memory here, just their data written to disk.
385 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000386STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387xfs_qm_dqflush_all(
Christoph Hellwiga7ef9bd2011-12-06 21:58:13 +0000388 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000390 struct xfs_quotainfo *q = mp->m_quotainfo;
391 int recl;
392 struct xfs_dquot *dqp;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000393 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000395 if (!q)
Jesper Juhl014c2542006-01-15 02:37:08 +0100396 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397again:
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000398 mutex_lock(&q->qi_dqlist_lock);
399 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 xfs_dqlock(dqp);
Christoph Hellwig92678552011-12-06 21:58:18 +0000401 if ((dqp->dq_flags & XFS_DQ_FREEING) ||
402 !XFS_DQ_IS_DIRTY(dqp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 xfs_dqunlock(dqp);
404 continue;
405 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 /* XXX a sentinel would be better */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000408 recl = q->qi_dqreclaims;
David Chinnere1f49cf2008-08-13 16:41:43 +1000409 if (!xfs_dqflock_nowait(dqp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 /*
411 * If we can't grab the flush lock then check
412 * to see if the dquot has been flushed delayed
413 * write. If so, grab its buffer and send it
414 * out immediately. We'll be able to acquire
415 * the flush lock when the I/O completes.
416 */
Christoph Hellwig800b4842011-12-06 21:58:14 +0000417 xfs_dqflock_pushbuf_wait(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 }
419 /*
420 * Let go of the mplist lock. We don't want to hold it
421 * across a disk write.
422 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000423 mutex_unlock(&q->qi_dqlist_lock);
Christoph Hellwiga7ef9bd2011-12-06 21:58:13 +0000424 error = xfs_qm_dqflush(dqp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 xfs_dqunlock(dqp);
426 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +0100427 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000429 mutex_lock(&q->qi_dqlist_lock);
430 if (recl != q->qi_dqreclaims) {
431 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 /* XXX restart limit */
433 goto again;
434 }
435 }
436
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000437 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 /* return ! busy */
Jesper Juhl014c2542006-01-15 02:37:08 +0100439 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440}
Christoph Hellwig92678552011-12-06 21:58:18 +0000441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442/*
443 * Release the group dquot pointers the user dquots may be
444 * carrying around as a hint. mplist is locked on entry and exit.
445 */
446STATIC void
447xfs_qm_detach_gdquots(
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000448 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000450 struct xfs_quotainfo *q = mp->m_quotainfo;
451 struct xfs_dquot *dqp, *gdqp;
452 int nrecl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
454 again:
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000455 ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
456 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 xfs_dqlock(dqp);
Christoph Hellwig92678552011-12-06 21:58:18 +0000458 if (dqp->dq_flags & XFS_DQ_FREEING) {
459 xfs_dqunlock(dqp);
460 mutex_unlock(&q->qi_dqlist_lock);
461 delay(1);
462 mutex_lock(&q->qi_dqlist_lock);
463 goto again;
464 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 if ((gdqp = dqp->q_gdquot)) {
466 xfs_dqlock(gdqp);
467 dqp->q_gdquot = NULL;
468 }
469 xfs_dqunlock(dqp);
470
471 if (gdqp) {
472 /*
473 * Can't hold the mplist lock across a dqput.
474 * XXXmust convert to marker based iterations here.
475 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000476 nrecl = q->qi_dqreclaims;
477 mutex_unlock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 xfs_qm_dqput(gdqp);
479
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000480 mutex_lock(&q->qi_dqlist_lock);
481 if (nrecl != q->qi_dqreclaims)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 goto again;
483 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 }
485}
486
487/*
488 * Go through all the incore dquots of this file system and take them
489 * off the mplist and hashlist, if the dquot type matches the dqtype
490 * parameter. This is used when turning off quota accounting for
491 * users and/or groups, as well as when the filesystem is unmounting.
492 */
493STATIC int
494xfs_qm_dqpurge_int(
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000495 struct xfs_mount *mp,
496 uint flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000498 struct xfs_quotainfo *q = mp->m_quotainfo;
499 struct xfs_dquot *dqp, *n;
500 uint dqtype;
Christoph Hellwig92678552011-12-06 21:58:18 +0000501 int nmisses = 0;
502 LIST_HEAD (dispose_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000504 if (!q)
Jesper Juhl014c2542006-01-15 02:37:08 +0100505 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
507 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000508 dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
510
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000511 mutex_lock(&q->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513 /*
514 * In the first pass through all incore dquots of this filesystem,
515 * we release the group dquot pointers the user dquots may be
516 * carrying around as a hint. We need to do this irrespective of
517 * what's being turned off.
518 */
519 xfs_qm_detach_gdquots(mp);
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 /*
Christoph Hellwig92678552011-12-06 21:58:18 +0000522 * Try to get rid of all of the unwanted dquots.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000524 list_for_each_entry_safe(dqp, n, &q->qi_dqlist, q_mplist) {
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +0000525 xfs_dqlock(dqp);
Christoph Hellwig92678552011-12-06 21:58:18 +0000526 if ((dqp->dq_flags & dqtype) != 0 &&
527 !(dqp->dq_flags & XFS_DQ_FREEING)) {
528 if (dqp->q_nrefs == 0) {
529 dqp->dq_flags |= XFS_DQ_FREEING;
530 list_move_tail(&dqp->q_mplist, &dispose_list);
531 } else
532 nmisses++;
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +0000533 }
534 xfs_dqunlock(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 }
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000536 mutex_unlock(&q->qi_dqlist_lock);
Christoph Hellwig92678552011-12-06 21:58:18 +0000537
538 list_for_each_entry_safe(dqp, n, &dispose_list, q_mplist)
539 xfs_qm_dqpurge(dqp);
540
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 return nmisses;
542}
543
544int
545xfs_qm_dqpurge_all(
546 xfs_mount_t *mp,
547 uint flags)
548{
549 int ndquots;
550
551 /*
552 * Purge the dquot cache.
553 * None of the dquots should really be busy at this point.
554 */
555 if (mp->m_quotainfo) {
556 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
557 delay(ndquots * 10);
558 }
559 }
560 return 0;
561}
562
563STATIC int
564xfs_qm_dqattach_one(
565 xfs_inode_t *ip,
566 xfs_dqid_t id,
567 uint type,
568 uint doalloc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 xfs_dquot_t *udqhint, /* hint */
570 xfs_dquot_t **IO_idqpp)
571{
572 xfs_dquot_t *dqp;
573 int error;
574
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000575 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 error = 0;
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 /*
579 * See if we already have it in the inode itself. IO_idqpp is
580 * &i_udquot or &i_gdquot. This made the code look weird, but
581 * made the logic a lot simpler.
582 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100583 dqp = *IO_idqpp;
584 if (dqp) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000585 trace_xfs_dqattach_found(dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100586 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 }
588
589 /*
590 * udqhint is the i_udquot field in inode, and is non-NULL only
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000591 * when the type arg is group/project. Its purpose is to save a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
593 * the user dquot.
594 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100595 if (udqhint) {
596 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 xfs_dqlock(udqhint);
598
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100599 /*
600 * No need to take dqlock to look at the id.
601 *
602 * The ID can't change until it gets reclaimed, and it won't
603 * be reclaimed as long as we have a ref from inode and we
604 * hold the ilock.
605 */
606 dqp = udqhint->q_gdquot;
607 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
608 xfs_dqlock(dqp);
609 XFS_DQHOLD(dqp);
610 ASSERT(*IO_idqpp == NULL);
611 *IO_idqpp = dqp;
612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 xfs_dqunlock(dqp);
614 xfs_dqunlock(udqhint);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100615 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 }
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100617
618 /*
619 * We can't hold a dquot lock when we call the dqget code.
620 * We'll deadlock in no time, because of (not conforming to)
621 * lock ordering - the inodelock comes before any dquot lock,
622 * and we may drop and reacquire the ilock in xfs_qm_dqget().
623 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 xfs_dqunlock(udqhint);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100625 }
626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 /*
628 * Find the dquot from somewhere. This bumps the
629 * reference count of dquot and returns it locked.
630 * This can return ENOENT if dquot didn't exist on
631 * disk and we didn't ask it to allocate;
632 * ESRCH if quotas got turned off suddenly.
633 */
Mitsuo Hayasakadb3e74b2011-11-10 01:33:10 +0000634 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
635 doalloc | XFS_QMOPT_DOWARN, &dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100636 if (error)
637 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000639 trace_xfs_dqattach_get(dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 /*
642 * dqget may have dropped and re-acquired the ilock, but it guarantees
643 * that the dquot returned is the one that should go in the inode.
644 */
645 *IO_idqpp = dqp;
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100646 xfs_dqunlock(dqp);
647 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648}
649
650
651/*
652 * Given a udquot and gdquot, attach a ptr to the group dquot in the
653 * udquot as a hint for future lookups. The idea sounds simple, but the
654 * execution isn't, because the udquot might have a group dquot attached
Nathan Scottc41564b2006-03-29 08:55:14 +1000655 * already and getting rid of that gets us into lock ordering constraints.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 * The process is complicated more by the fact that the dquots may or may not
657 * be locked on entry.
658 */
659STATIC void
660xfs_qm_dqattach_grouphint(
661 xfs_dquot_t *udq,
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100662 xfs_dquot_t *gdq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663{
664 xfs_dquot_t *tmp;
665
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100666 xfs_dqlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
668 if ((tmp = udq->q_gdquot)) {
669 if (tmp == gdq) {
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100670 xfs_dqunlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 return;
672 }
673
674 udq->q_gdquot = NULL;
675 /*
676 * We can't keep any dqlocks when calling dqrele,
677 * because the freelist lock comes before dqlocks.
678 */
679 xfs_dqunlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 /*
681 * we took a hard reference once upon a time in dqget,
682 * so give it back when the udquot no longer points at it
683 * dqput() does the unlocking of the dquot.
684 */
685 xfs_qm_dqrele(tmp);
686
687 xfs_dqlock(udq);
688 xfs_dqlock(gdq);
689
690 } else {
691 ASSERT(XFS_DQ_IS_LOCKED(udq));
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100692 xfs_dqlock(gdq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 }
694
695 ASSERT(XFS_DQ_IS_LOCKED(udq));
696 ASSERT(XFS_DQ_IS_LOCKED(gdq));
697 /*
698 * Somebody could have attached a gdquot here,
699 * when we dropped the uqlock. If so, just do nothing.
700 */
701 if (udq->q_gdquot == NULL) {
702 XFS_DQHOLD(gdq);
703 udq->q_gdquot = gdq;
704 }
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100705
706 xfs_dqunlock(gdq);
707 xfs_dqunlock(udq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708}
709
710
711/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000712 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
713 * into account.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 * Inode may get unlocked and relocked in here, and the caller must deal with
716 * the consequences.
717 */
718int
Christoph Hellwig7d095252009-06-08 15:33:32 +0200719xfs_qm_dqattach_locked(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 xfs_inode_t *ip,
721 uint flags)
722{
723 xfs_mount_t *mp = ip->i_mount;
724 uint nquotas = 0;
725 int error = 0;
726
Christoph Hellwig7d095252009-06-08 15:33:32 +0200727 if (!XFS_IS_QUOTA_RUNNING(mp) ||
728 !XFS_IS_QUOTA_ON(mp) ||
729 !XFS_NOT_DQATTACHED(mp, ip) ||
730 ip->i_ino == mp->m_sb.sb_uquotino ||
731 ip->i_ino == mp->m_sb.sb_gquotino)
Jesper Juhl014c2542006-01-15 02:37:08 +0100732 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
Christoph Hellwig7d095252009-06-08 15:33:32 +0200734 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736 if (XFS_IS_UQUOTA_ON(mp)) {
737 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
738 flags & XFS_QMOPT_DQALLOC,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 NULL, &ip->i_udquot);
740 if (error)
741 goto done;
742 nquotas++;
743 }
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000744
745 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000746 if (XFS_IS_OQUOTA_ON(mp)) {
747 error = XFS_IS_GQUOTA_ON(mp) ?
748 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
749 flags & XFS_QMOPT_DQALLOC,
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000750 ip->i_udquot, &ip->i_gdquot) :
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000751 xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 flags & XFS_QMOPT_DQALLOC,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 ip->i_udquot, &ip->i_gdquot);
754 /*
755 * Don't worry about the udquot that we may have
756 * attached above. It'll get detached, if not already.
757 */
758 if (error)
759 goto done;
760 nquotas++;
761 }
762
763 /*
764 * Attach this group quota to the user quota as a hint.
765 * This WON'T, in general, result in a thrash.
766 */
767 if (nquotas == 2) {
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000768 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 ASSERT(ip->i_udquot);
770 ASSERT(ip->i_gdquot);
771
772 /*
773 * We may or may not have the i_udquot locked at this point,
774 * but this check is OK since we don't depend on the i_gdquot to
775 * be accurate 100% all the time. It is just a hint, and this
776 * will succeed in general.
777 */
778 if (ip->i_udquot->q_gdquot == ip->i_gdquot)
779 goto done;
780 /*
781 * Attach i_gdquot to the gdquot hint inside the i_udquot.
782 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100783 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 }
785
Christoph Hellwig7d095252009-06-08 15:33:32 +0200786 done:
Christoph Hellwigea15ab32011-07-13 13:43:50 +0200787#ifdef DEBUG
788 if (!error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 if (XFS_IS_UQUOTA_ON(mp))
790 ASSERT(ip->i_udquot);
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000791 if (XFS_IS_OQUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 ASSERT(ip->i_gdquot);
793 }
Christoph Hellwig7d095252009-06-08 15:33:32 +0200794 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795#endif
Christoph Hellwig7d095252009-06-08 15:33:32 +0200796 return error;
797}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Christoph Hellwig7d095252009-06-08 15:33:32 +0200799int
800xfs_qm_dqattach(
801 struct xfs_inode *ip,
802 uint flags)
803{
804 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Christoph Hellwig7d095252009-06-08 15:33:32 +0200806 xfs_ilock(ip, XFS_ILOCK_EXCL);
807 error = xfs_qm_dqattach_locked(ip, flags);
808 xfs_iunlock(ip, XFS_ILOCK_EXCL);
809
Jesper Juhl014c2542006-01-15 02:37:08 +0100810 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811}
812
813/*
814 * Release dquots (and their references) if any.
815 * The inode should be locked EXCL except when this's called by
816 * xfs_ireclaim.
817 */
818void
819xfs_qm_dqdetach(
820 xfs_inode_t *ip)
821{
822 if (!(ip->i_udquot || ip->i_gdquot))
823 return;
824
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000825 trace_xfs_dquot_dqdetach(ip);
826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
828 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 if (ip->i_udquot) {
830 xfs_qm_dqrele(ip->i_udquot);
831 ip->i_udquot = NULL;
832 }
833 if (ip->i_gdquot) {
834 xfs_qm_dqrele(ip->i_gdquot);
835 ip->i_gdquot = NULL;
836 }
837}
838
Christoph Hellwiga4edd1d2009-01-19 02:03:11 +0100839/*
840 * The hash chains and the mplist use the same xfs_dqhash structure as
841 * their list head, but we can take the mplist qh_lock and one of the
842 * hash qh_locks at the same time without any problem as they aren't
843 * related.
844 */
845static struct lock_class_key xfs_quota_mplist_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
847/*
848 * This initializes all the quota information that's kept in the
849 * mount structure
850 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000851STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852xfs_qm_init_quotainfo(
853 xfs_mount_t *mp)
854{
855 xfs_quotainfo_t *qinf;
856 int error;
857 xfs_dquot_t *dqp;
858
859 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
860
861 /*
862 * Tell XQM that we exist as soon as possible.
863 */
864 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
Jesper Juhl014c2542006-01-15 02:37:08 +0100865 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 }
867
868 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
869
870 /*
871 * See if quotainodes are setup, and if not, allocate them,
872 * and change the superblock accordingly.
873 */
874 if ((error = xfs_qm_init_quotainos(mp))) {
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000875 kmem_free(qinf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 mp->m_quotainfo = NULL;
Jesper Juhl014c2542006-01-15 02:37:08 +0100877 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 }
879
Dave Chinner3a254042010-04-13 15:06:48 +1000880 INIT_LIST_HEAD(&qinf->qi_dqlist);
881 mutex_init(&qinf->qi_dqlist_lock);
882 lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class);
Christoph Hellwiga4edd1d2009-01-19 02:03:11 +0100883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 qinf->qi_dqreclaims = 0;
885
886 /* mutex used to serialize quotaoffs */
Jes Sorensen794ee1b2006-01-09 15:59:21 -0800887 mutex_init(&qinf->qi_quotaofflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
889 /* Precalc some constants */
890 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
891 ASSERT(qinf->qi_dqchunklen);
892 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
893 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
894
895 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
896
897 /*
898 * We try to get the limits from the superuser's limits fields.
899 * This is quite hacky, but it is standard quota practice.
900 * We look at the USR dquot with id == 0 first, but if user quotas
901 * are not enabled we goto the GRP dquot with id == 0.
902 * We don't really care to keep separate default limits for user
903 * and group quotas, at least not at this point.
904 */
905 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000906 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
907 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
908 XFS_DQ_PROJ),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
910 &dqp);
911 if (! error) {
912 xfs_disk_dquot_t *ddqp = &dqp->q_core;
913
914 /*
915 * The warnings and timers set the grace period given to
916 * a user or group before he or she can not perform any
917 * more writing. If it is zero, a default is used.
918 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100919 qinf->qi_btimelimit = ddqp->d_btimer ?
920 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
921 qinf->qi_itimelimit = ddqp->d_itimer ?
922 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
923 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
924 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
925 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
926 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
927 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
928 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
929 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
930 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
931 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
932 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
933 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
934 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
935 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
936 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
938 /*
939 * We sent the XFS_QMOPT_DQSUSER flag to dqget because
940 * we don't want this dquot cached. We haven't done a
941 * quotacheck yet, and quotacheck doesn't like incore dquots.
942 */
943 xfs_qm_dqdestroy(dqp);
944 } else {
945 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
946 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
947 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
948 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
949 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
Nathan Scott06d10dd2005-06-21 15:48:47 +1000950 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 }
952
Jesper Juhl014c2542006-01-15 02:37:08 +0100953 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954}
955
956
957/*
958 * Gets called when unmounting a filesystem or when all quotas get
959 * turned off.
960 * This purges the quota inodes, destroys locks and frees itself.
961 */
962void
963xfs_qm_destroy_quotainfo(
964 xfs_mount_t *mp)
965{
966 xfs_quotainfo_t *qi;
967
968 qi = mp->m_quotainfo;
969 ASSERT(qi != NULL);
970 ASSERT(xfs_Gqm != NULL);
971
972 /*
973 * Release the reference that XQM kept, so that we know
974 * when the XQM structure should be freed. We cannot assume
975 * that xfs_Gqm is non-null after this point.
976 */
977 xfs_qm_rele_quotafs_ref(mp);
978
Dave Chinner3a254042010-04-13 15:06:48 +1000979 ASSERT(list_empty(&qi->qi_dqlist));
980 mutex_destroy(&qi->qi_dqlist_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
982 if (qi->qi_uquotaip) {
Christoph Hellwig26cc0022008-07-18 17:12:43 +1000983 IRELE(qi->qi_uquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 qi->qi_uquotaip = NULL; /* paranoia */
985 }
986 if (qi->qi_gquotaip) {
Christoph Hellwig26cc0022008-07-18 17:12:43 +1000987 IRELE(qi->qi_gquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 qi->qi_gquotaip = NULL;
989 }
990 mutex_destroy(&qi->qi_quotaofflock);
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000991 kmem_free(qi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 mp->m_quotainfo = NULL;
993}
994
995
996
997/* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
998
999/* ARGSUSED */
1000STATIC void
1001xfs_qm_list_init(
1002 xfs_dqlist_t *list,
1003 char *str,
1004 int n)
1005{
Jes Sorensen794ee1b2006-01-09 15:59:21 -08001006 mutex_init(&list->qh_lock);
Dave Chinnere6a81f12010-04-13 15:06:51 +10001007 INIT_LIST_HEAD(&list->qh_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 list->qh_version = 0;
1009 list->qh_nelems = 0;
1010}
1011
1012STATIC void
1013xfs_qm_list_destroy(
1014 xfs_dqlist_t *list)
1015{
1016 mutex_destroy(&(list->qh_lock));
1017}
1018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019/*
1020 * Create an inode and return with a reference already taken, but unlocked
1021 * This is how we create quota inodes
1022 */
1023STATIC int
1024xfs_qm_qino_alloc(
1025 xfs_mount_t *mp,
1026 xfs_inode_t **ip,
1027 __int64_t sbfields,
1028 uint flags)
1029{
1030 xfs_trans_t *tp;
1031 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 int committed;
1033
Nathan Scott061f7202006-01-11 15:27:50 +11001034 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 if ((error = xfs_trans_reserve(tp,
1036 XFS_QM_QINOCREATE_SPACE_RES(mp),
1037 XFS_CREATE_LOG_RES(mp), 0,
1038 XFS_TRANS_PERM_LOG_RES,
1039 XFS_CREATE_LOG_COUNT))) {
1040 xfs_trans_cancel(tp, 0);
Jesper Juhl014c2542006-01-15 02:37:08 +01001041 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +00001044 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
1045 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1047 XFS_TRANS_ABORT);
Jesper Juhl014c2542006-01-15 02:37:08 +01001048 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 }
1050
1051 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 * Make the changes in the superblock, and log those too.
1053 * sbfields arg may contain fields other than *QUOTINO;
1054 * VERSIONNUM for example.
1055 */
Eric Sandeen3685c2a2007-10-11 17:42:32 +10001056 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 if (flags & XFS_QMOPT_SBVERSION) {
Eric Sandeen62118702008-03-06 13:44:28 +11001058 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1060 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
1061 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1062 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
1063
Eric Sandeen62118702008-03-06 13:44:28 +11001064 xfs_sb_version_addquota(&mp->m_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 mp->m_sb.sb_uquotino = NULLFSINO;
1066 mp->m_sb.sb_gquotino = NULLFSINO;
1067
1068 /* qflags will get updated _after_ quotacheck */
1069 mp->m_sb.sb_qflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 }
1071 if (flags & XFS_QMOPT_UQUOTA)
1072 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1073 else
1074 mp->m_sb.sb_gquotino = (*ip)->i_ino;
Eric Sandeen3685c2a2007-10-11 17:42:32 +10001075 spin_unlock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 xfs_mod_sb(tp, sbfields);
1077
Eric Sandeen1c72bf92007-05-08 13:48:42 +10001078 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
Dave Chinner53487782011-03-07 10:05:35 +11001079 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
Jesper Juhl014c2542006-01-15 02:37:08 +01001080 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 }
Jesper Juhl014c2542006-01-15 02:37:08 +01001082 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083}
1084
1085
David Chinner5b139732008-04-10 12:20:10 +10001086STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087xfs_qm_reset_dqcounts(
1088 xfs_mount_t *mp,
1089 xfs_buf_t *bp,
1090 xfs_dqid_t id,
1091 uint type)
1092{
1093 xfs_disk_dquot_t *ddq;
1094 int j;
1095
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001096 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1097
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 /*
1099 * Reset all counters and timers. They'll be
1100 * started afresh by xfs_qm_quotacheck.
1101 */
1102#ifdef DEBUG
1103 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1104 do_div(j, sizeof(xfs_dqblk_t));
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001105 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106#endif
Chandra Seetharaman62926042011-07-22 23:40:15 +00001107 ddq = bp->b_addr;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001108 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 /*
1110 * Do a sanity check, and if needed, repair the dqblk. Don't
1111 * output any warnings because it's perfectly possible to
Nathan Scottc41564b2006-03-29 08:55:14 +10001112 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 */
Dave Chinnera0fa2b62011-03-07 10:01:35 +11001114 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 "xfs_quotacheck");
Christoph Hellwig1149d962005-11-02 15:01:12 +11001116 ddq->d_bcount = 0;
1117 ddq->d_icount = 0;
1118 ddq->d_rtbcount = 0;
1119 ddq->d_btimer = 0;
1120 ddq->d_itimer = 0;
1121 ddq->d_rtbtimer = 0;
1122 ddq->d_bwarns = 0;
1123 ddq->d_iwarns = 0;
1124 ddq->d_rtbwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1126 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127}
1128
1129STATIC int
1130xfs_qm_dqiter_bufs(
1131 xfs_mount_t *mp,
1132 xfs_dqid_t firstid,
1133 xfs_fsblock_t bno,
1134 xfs_filblks_t blkcnt,
1135 uint flags)
1136{
1137 xfs_buf_t *bp;
1138 int error;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001139 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
1141 ASSERT(blkcnt > 0);
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001142 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1143 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 error = 0;
1145
1146 /*
1147 * Blkcnt arg can be a very big number, and might even be
1148 * larger than the log itself. So, we have to break it up into
1149 * manageable-sized transactions.
1150 * Note that we don't start a permanent transaction here; we might
1151 * not be able to get a log reservation for the whole thing up front,
1152 * and we don't really care to either, because we just discard
1153 * everything if we were to crash in the middle of this loop.
1154 */
1155 while (blkcnt--) {
1156 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1157 XFS_FSB_TO_DADDR(mp, bno),
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001158 mp->m_quotainfo->qi_dqchunklen, 0, &bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 if (error)
1160 break;
1161
David Chinner5b139732008-04-10 12:20:10 +10001162 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
Christoph Hellwig61551f12011-08-23 08:28:06 +00001163 xfs_buf_delwri_queue(bp);
1164 xfs_buf_relse(bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 /*
1166 * goto the next block.
1167 */
1168 bno++;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001169 firstid += mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 }
Jesper Juhl014c2542006-01-15 02:37:08 +01001171 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172}
1173
1174/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001175 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 * caller supplied function for every chunk of dquots that we find.
1177 */
1178STATIC int
1179xfs_qm_dqiterate(
1180 xfs_mount_t *mp,
1181 xfs_inode_t *qip,
1182 uint flags)
1183{
1184 xfs_bmbt_irec_t *map;
1185 int i, nmaps; /* number of map entries */
1186 int error; /* return value */
1187 xfs_fileoff_t lblkno;
1188 xfs_filblks_t maxlblkcnt;
1189 xfs_dqid_t firstid;
1190 xfs_fsblock_t rablkno;
1191 xfs_filblks_t rablkcnt;
1192
1193 error = 0;
1194 /*
Nathan Scottc41564b2006-03-29 08:55:14 +10001195 * This looks racy, but we can't keep an inode lock across a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 * trans_reserve. But, this gets called during quotacheck, and that
1197 * happens only at mount time which is single threaded.
1198 */
1199 if (qip->i_d.di_nblocks == 0)
Jesper Juhl014c2542006-01-15 02:37:08 +01001200 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
1202 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1203
1204 lblkno = 0;
1205 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1206 do {
1207 nmaps = XFS_DQITER_MAP_SIZE;
1208 /*
1209 * We aren't changing the inode itself. Just changing
1210 * some of its data. No new blocks are added here, and
1211 * the inode is never added to the transaction.
1212 */
1213 xfs_ilock(qip, XFS_ILOCK_SHARED);
Dave Chinner5c8ed202011-09-18 20:40:45 +00001214 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1215 map, &nmaps, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1217 if (error)
1218 break;
1219
1220 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1221 for (i = 0; i < nmaps; i++) {
1222 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1223 ASSERT(map[i].br_blockcount);
1224
1225
1226 lblkno += map[i].br_blockcount;
1227
1228 if (map[i].br_startblock == HOLESTARTBLOCK)
1229 continue;
1230
1231 firstid = (xfs_dqid_t) map[i].br_startoff *
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001232 mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 /*
1234 * Do a read-ahead on the next extent.
1235 */
1236 if ((i+1 < nmaps) &&
1237 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1238 rablkcnt = map[i+1].br_blockcount;
1239 rablkno = map[i+1].br_startblock;
1240 while (rablkcnt--) {
Christoph Hellwig1a1a3e92010-10-06 18:41:18 +00001241 xfs_buf_readahead(mp->m_ddev_targp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 XFS_FSB_TO_DADDR(mp, rablkno),
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001243 mp->m_quotainfo->qi_dqchunklen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 rablkno++;
1245 }
1246 }
1247 /*
1248 * Iterate thru all the blks in the extent and
1249 * reset the counters of all the dquots inside them.
1250 */
1251 if ((error = xfs_qm_dqiter_bufs(mp,
1252 firstid,
1253 map[i].br_startblock,
1254 map[i].br_blockcount,
1255 flags))) {
1256 break;
1257 }
1258 }
1259
1260 if (error)
1261 break;
1262 } while (nmaps > 0);
1263
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10001264 kmem_free(map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Jesper Juhl014c2542006-01-15 02:37:08 +01001266 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267}
1268
1269/*
1270 * Called by dqusage_adjust in doing a quotacheck.
Christoph Hellwig52fda112010-09-06 01:44:22 +00001271 *
1272 * Given the inode, and a dquot id this updates both the incore dqout as well
1273 * as the buffer copy. This is so that once the quotacheck is done, we can
1274 * just log all the buffers, as opposed to logging numerous updates to
1275 * individual dquots.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001277STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278xfs_qm_quotacheck_dqadjust(
Christoph Hellwig52fda112010-09-06 01:44:22 +00001279 struct xfs_inode *ip,
1280 xfs_dqid_t id,
1281 uint type,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 xfs_qcnt_t nblks,
1283 xfs_qcnt_t rtblks)
1284{
Christoph Hellwig52fda112010-09-06 01:44:22 +00001285 struct xfs_mount *mp = ip->i_mount;
1286 struct xfs_dquot *dqp;
1287 int error;
1288
1289 error = xfs_qm_dqget(mp, ip, id, type,
1290 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1291 if (error) {
1292 /*
1293 * Shouldn't be able to turn off quotas here.
1294 */
1295 ASSERT(error != ESRCH);
1296 ASSERT(error != ENOENT);
1297 return error;
1298 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001299
1300 trace_xfs_dqadjust(dqp);
1301
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 /*
1303 * Adjust the inode count and the block count to reflect this inode's
1304 * resource usage.
1305 */
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001306 be64_add_cpu(&dqp->q_core.d_icount, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 dqp->q_res_icount++;
1308 if (nblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001309 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 dqp->q_res_bcount += nblks;
1311 }
1312 if (rtblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001313 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 dqp->q_res_rtbcount += rtblks;
1315 }
1316
1317 /*
1318 * Set default limits, adjust timers (since we changed usages)
Christoph Hellwig191f8482010-04-20 17:01:53 +10001319 *
1320 * There are no timers for the default values set in the root dquot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 */
Christoph Hellwig191f8482010-04-20 17:01:53 +10001322 if (dqp->q_core.d_id) {
Christoph Hellwig52fda112010-09-06 01:44:22 +00001323 xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
1324 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 }
1326
1327 dqp->dq_flags |= XFS_DQ_DIRTY;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001328 xfs_qm_dqput(dqp);
1329 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330}
1331
1332STATIC int
1333xfs_qm_get_rtblks(
1334 xfs_inode_t *ip,
1335 xfs_qcnt_t *O_rtblks)
1336{
1337 xfs_filblks_t rtblks; /* total rt blks */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001338 xfs_extnum_t idx; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 xfs_ifork_t *ifp; /* inode fork pointer */
1340 xfs_extnum_t nextents; /* number of extent entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 int error;
1342
1343 ASSERT(XFS_IS_REALTIME_INODE(ip));
1344 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1345 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1346 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
Jesper Juhl014c2542006-01-15 02:37:08 +01001347 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 }
1349 rtblks = 0;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001350 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10001351 for (idx = 0; idx < nextents; idx++)
1352 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 *O_rtblks = (xfs_qcnt_t)rtblks;
Jesper Juhl014c2542006-01-15 02:37:08 +01001354 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355}
1356
1357/*
1358 * callback routine supplied to bulkstat(). Given an inumber, find its
1359 * dquots and update them to account for resources taken by that inode.
1360 */
1361/* ARGSUSED */
1362STATIC int
1363xfs_qm_dqusage_adjust(
1364 xfs_mount_t *mp, /* mount point for filesystem */
1365 xfs_ino_t ino, /* inode number to get data for */
1366 void __user *buffer, /* not used */
1367 int ubsize, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 int *ubused, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 int *res) /* result code value */
1370{
1371 xfs_inode_t *ip;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001372 xfs_qcnt_t nblks, rtblks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 int error;
1374
1375 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1376
1377 /*
1378 * rootino must have its resources accounted for, not so with the quota
1379 * inodes.
1380 */
1381 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1382 *res = BULKSTAT_RV_NOTHING;
1383 return XFS_ERROR(EINVAL);
1384 }
1385
1386 /*
1387 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1388 * interface expects the inode to be exclusively locked because that's
1389 * the case in all other instances. It's OK that we do this because
1390 * quotacheck is done only at mount time.
1391 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001392 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1393 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 *res = BULKSTAT_RV_NOTHING;
Jesper Juhl014c2542006-01-15 02:37:08 +01001395 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 }
1397
Christoph Hellwig52fda112010-09-06 01:44:22 +00001398 ASSERT(ip->i_delayed_blks == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
Christoph Hellwig52fda112010-09-06 01:44:22 +00001400 if (XFS_IS_REALTIME_INODE(ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 /*
1402 * Walk thru the extent list and count the realtime blocks.
1403 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001404 error = xfs_qm_get_rtblks(ip, &rtblks);
1405 if (error)
1406 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408
Christoph Hellwig52fda112010-09-06 01:44:22 +00001409 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
1411 /*
1412 * Add the (disk blocks and inode) resources occupied by this
1413 * inode to its dquots. We do this adjustment in the incore dquot,
1414 * and also copy the changes to its buffer.
1415 * We don't care about putting these changes in a transaction
1416 * envelope because if we crash in the middle of a 'quotacheck'
1417 * we have to start from the beginning anyway.
1418 * Once we're done, we'll log all the dquot bufs.
1419 *
Nathan Scottc41564b2006-03-29 08:55:14 +10001420 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1422 */
1423 if (XFS_IS_UQUOTA_ON(mp)) {
Christoph Hellwig52fda112010-09-06 01:44:22 +00001424 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1425 XFS_DQ_USER, nblks, rtblks);
1426 if (error)
1427 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429
Christoph Hellwig52fda112010-09-06 01:44:22 +00001430 if (XFS_IS_GQUOTA_ON(mp)) {
1431 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1432 XFS_DQ_GROUP, nblks, rtblks);
1433 if (error)
1434 goto error0;
1435 }
1436
1437 if (XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001438 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
Christoph Hellwig52fda112010-09-06 01:44:22 +00001439 XFS_DQ_PROJ, nblks, rtblks);
1440 if (error)
1441 goto error0;
1442 }
1443
1444 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1445 IRELE(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 *res = BULKSTAT_RV_DIDONE;
Jesper Juhl014c2542006-01-15 02:37:08 +01001447 return 0;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001448
1449error0:
1450 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1451 IRELE(ip);
1452 *res = BULKSTAT_RV_GIVEUP;
1453 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454}
1455
1456/*
1457 * Walk thru all the filesystem inodes and construct a consistent view
1458 * of the disk quota world. If the quotacheck fails, disable quotas.
1459 */
1460int
1461xfs_qm_quotacheck(
1462 xfs_mount_t *mp)
1463{
1464 int done, count, error;
1465 xfs_ino_t lastino;
1466 size_t structsz;
1467 xfs_inode_t *uip, *gip;
1468 uint flags;
1469
1470 count = INT_MAX;
1471 structsz = 1;
1472 lastino = 0;
1473 flags = 0;
1474
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001475 ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1477
1478 /*
1479 * There should be no cached dquots. The (simplistic) quotacheck
1480 * algorithm doesn't like that.
1481 */
Dave Chinner3a254042010-04-13 15:06:48 +10001482 ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483
Dave Chinner0b932cc2011-03-07 10:08:35 +11001484 xfs_notice(mp, "Quotacheck needed: Please wait.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485
1486 /*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001487 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 * their counters to zero. We need a clean slate.
1489 * We don't log our changes till later.
1490 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001491 uip = mp->m_quotainfo->qi_uquotaip;
1492 if (uip) {
1493 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA);
1494 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 goto error_return;
1496 flags |= XFS_UQUOTA_CHKD;
1497 }
1498
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001499 gip = mp->m_quotainfo->qi_gquotaip;
1500 if (gip) {
1501 error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1502 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1503 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 goto error_return;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001505 flags |= XFS_OQUOTA_CHKD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 }
1507
1508 do {
1509 /*
1510 * Iterate thru all the inodes in the file system,
1511 * adjusting the corresponding dquot counters in core.
1512 */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001513 error = xfs_bulkstat(mp, &lastino, &count,
1514 xfs_qm_dqusage_adjust,
1515 structsz, NULL, &done);
1516 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 break;
1518
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001519 } while (!done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520
1521 /*
David Chinner4b8879d2008-04-10 12:20:17 +10001522 * We've made all the changes that we need to make incore.
1523 * Flush them down to disk buffers if everything was updated
1524 * successfully.
1525 */
1526 if (!error)
Christoph Hellwiga7ef9bd2011-12-06 21:58:13 +00001527 error = xfs_qm_dqflush_all(mp);
David Chinner4b8879d2008-04-10 12:20:17 +10001528
1529 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 * We can get this error if we couldn't do a dquot allocation inside
1531 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1532 * dirty dquots that might be cached, we just want to get rid of them
1533 * and turn quotaoff. The dquots won't be attached to any of the inodes
1534 * at this point (because we intentionally didn't in dqget_noattach).
1535 */
1536 if (error) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +10001537 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 goto error_return;
1539 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
1541 /*
1542 * We didn't log anything, because if we crashed, we'll have to
1543 * start the quotacheck from scratch anyway. However, we must make
1544 * sure that our dquot changes are secure before we put the
1545 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1546 * flush.
1547 */
Christoph Hellwiga9add832011-10-10 16:52:52 +00001548 xfs_flush_buftarg(mp->m_ddev_targp, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
1550 /*
1551 * If one type of quotas is off, then it will lose its
1552 * quotachecked status, since we won't be doing accounting for
1553 * that type anymore.
1554 */
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001555 mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556 mp->m_qflags |= flags;
1557
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 error_return:
1559 if (error) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001560 xfs_warn(mp,
1561 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1562 error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 /*
1564 * We must turn off quotas.
1565 */
1566 ASSERT(mp->m_quotainfo != NULL);
1567 ASSERT(xfs_Gqm != NULL);
1568 xfs_qm_destroy_quotainfo(mp);
David Chinner31d55772008-04-10 12:20:38 +10001569 if (xfs_mount_reset_sbqflags(mp)) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001570 xfs_warn(mp,
1571 "Quotacheck: Failed to reset quota flags.");
David Chinner31d55772008-04-10 12:20:38 +10001572 }
Dave Chinner0b932cc2011-03-07 10:08:35 +11001573 } else
1574 xfs_notice(mp, "Quotacheck: Done.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 return (error);
1576}
1577
1578/*
1579 * This is called after the superblock has been read in and we're ready to
1580 * iget the quota inodes.
1581 */
1582STATIC int
1583xfs_qm_init_quotainos(
1584 xfs_mount_t *mp)
1585{
1586 xfs_inode_t *uip, *gip;
1587 int error;
1588 __int64_t sbflags;
1589 uint flags;
1590
1591 ASSERT(mp->m_quotainfo);
1592 uip = gip = NULL;
1593 sbflags = 0;
1594 flags = 0;
1595
1596 /*
1597 * Get the uquota and gquota inodes
1598 */
Eric Sandeen62118702008-03-06 13:44:28 +11001599 if (xfs_sb_version_hasquota(&mp->m_sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 if (XFS_IS_UQUOTA_ON(mp) &&
1601 mp->m_sb.sb_uquotino != NULLFSINO) {
1602 ASSERT(mp->m_sb.sb_uquotino > 0);
1603 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
Dave Chinner7b6259e2010-06-24 11:35:17 +10001604 0, 0, &uip)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 return XFS_ERROR(error);
1606 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001607 if (XFS_IS_OQUOTA_ON(mp) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 mp->m_sb.sb_gquotino != NULLFSINO) {
1609 ASSERT(mp->m_sb.sb_gquotino > 0);
1610 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
Dave Chinner7b6259e2010-06-24 11:35:17 +10001611 0, 0, &gip))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 if (uip)
Christoph Hellwig43355092008-03-27 18:01:08 +11001613 IRELE(uip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 return XFS_ERROR(error);
1615 }
1616 }
1617 } else {
1618 flags |= XFS_QMOPT_SBVERSION;
1619 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1620 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1621 }
1622
1623 /*
1624 * Create the two inodes, if they don't exist already. The changes
1625 * made above will get added to a transaction and logged in one of
1626 * the qino_alloc calls below. If the device is readonly,
1627 * temporarily switch to read-write to do this.
1628 */
1629 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1630 if ((error = xfs_qm_qino_alloc(mp, &uip,
1631 sbflags | XFS_SB_UQUOTINO,
1632 flags | XFS_QMOPT_UQUOTA)))
1633 return XFS_ERROR(error);
1634
1635 flags &= ~XFS_QMOPT_SBVERSION;
1636 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001637 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1638 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1639 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1640 error = xfs_qm_qino_alloc(mp, &gip,
1641 sbflags | XFS_SB_GQUOTINO, flags);
1642 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 if (uip)
Christoph Hellwig43355092008-03-27 18:01:08 +11001644 IRELE(uip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
1646 return XFS_ERROR(error);
1647 }
1648 }
1649
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001650 mp->m_quotainfo->qi_uquotaip = uip;
1651 mp->m_quotainfo->qi_gquotaip = gip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
Jesper Juhl014c2542006-01-15 02:37:08 +01001653 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654}
1655
1656
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657
1658/*
Christoph Hellwig92678552011-12-06 21:58:18 +00001659 * Pop the least recently used dquot off the freelist and recycle it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 */
Christoph Hellwig92678552011-12-06 21:58:18 +00001661STATIC struct xfs_dquot *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662xfs_qm_dqreclaim_one(void)
1663{
Christoph Hellwig92678552011-12-06 21:58:18 +00001664 struct xfs_dquot *dqp;
1665 int restarts = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Dave Chinner3a8406f2010-04-13 15:06:52 +10001667 mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
Christoph Hellwig92678552011-12-06 21:58:18 +00001668restart:
Dave Chinner3a8406f2010-04-13 15:06:52 +10001669 list_for_each_entry(dqp, &xfs_Gqm->qm_dqfrlist, q_freelist) {
Dave Chinner3a254042010-04-13 15:06:48 +10001670 struct xfs_mount *mp = dqp->q_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 xfs_dqlock(dqp);
1672
1673 /*
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +00001674 * This dquot has already been grabbed by dqlookup.
1675 * Remove it from the freelist and try again.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 */
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +00001677 if (dqp->q_nrefs) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001678 trace_xfs_dqreclaim_want(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +00001680
1681 list_del_init(&dqp->q_freelist);
1682 xfs_Gqm->qm_dqfrlist_cnt--;
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001683 restarts++;
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001684 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 }
1686
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 ASSERT(dqp->q_hash);
Dave Chinner3a254042010-04-13 15:06:48 +10001688 ASSERT(!list_empty(&dqp->q_mplist));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689
1690 /*
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001691 * Try to grab the flush lock. If this dquot is in the process
1692 * of getting flushed to disk, we don't want to reclaim it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 */
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001694 if (!xfs_dqflock_nowait(dqp))
1695 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
1697 /*
1698 * We have the flush lock so we know that this is not in the
1699 * process of being flushed. So, if this is dirty, flush it
1700 * DELWRI so that we don't get a freelist infested with
1701 * dirty dquots.
1702 */
1703 if (XFS_DQ_IS_DIRTY(dqp)) {
David Chinner3c568362008-04-10 12:20:24 +10001704 int error;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001705
1706 trace_xfs_dqreclaim_dirty(dqp);
1707
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 /*
1709 * We flush it delayed write, so don't bother
1710 * releasing the freelist lock.
1711 */
Christoph Hellwigfdedf282011-12-06 21:58:10 +00001712 error = xfs_qm_dqflush(dqp, SYNC_TRYLOCK);
David Chinner3c568362008-04-10 12:20:24 +10001713 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +11001714 xfs_warn(mp, "%s: dquot %p flush failed",
1715 __func__, dqp);
David Chinner3c568362008-04-10 12:20:24 +10001716 }
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001717 goto dqunlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 }
Christoph Hellwig92678552011-12-06 21:58:18 +00001719 xfs_dqfunlock(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720
Dave Chinner368e1362010-04-13 15:06:50 +10001721 /*
Christoph Hellwig92678552011-12-06 21:58:18 +00001722 * Prevent lookup now that we are going to reclaim the dquot.
1723 * Once XFS_DQ_FREEING is set lookup won't touch the dquot,
1724 * thus we can drop the lock now.
Dave Chinner368e1362010-04-13 15:06:50 +10001725 */
Christoph Hellwig92678552011-12-06 21:58:18 +00001726 dqp->dq_flags |= XFS_DQ_FREEING;
1727 xfs_dqunlock(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
Christoph Hellwig92678552011-12-06 21:58:18 +00001729 mutex_lock(&dqp->q_hash->qh_lock);
1730 list_del_init(&dqp->q_hashlist);
1731 dqp->q_hash->qh_version++;
1732 mutex_unlock(&dqp->q_hash->qh_lock);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001733
Christoph Hellwig92678552011-12-06 21:58:18 +00001734 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
Dave Chinner3a254042010-04-13 15:06:48 +10001735 list_del_init(&dqp->q_mplist);
1736 mp->m_quotainfo->qi_dquots--;
1737 mp->m_quotainfo->qi_dqreclaims++;
Christoph Hellwig92678552011-12-06 21:58:18 +00001738 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
1739
1740 ASSERT(dqp->q_nrefs == 0);
Dave Chinner3a8406f2010-04-13 15:06:52 +10001741 list_del_init(&dqp->q_freelist);
1742 xfs_Gqm->qm_dqfrlist_cnt--;
Christoph Hellwig92678552011-12-06 21:58:18 +00001743
1744 mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
1745 return dqp;
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001746dqunlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 xfs_dqunlock(dqp);
Dave Chinner368e1362010-04-13 15:06:50 +10001748 if (restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
Dave Chinner0fbca4d2011-01-28 11:20:46 +11001749 break;
Christoph Hellwig92678552011-12-06 21:58:18 +00001750 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 }
Christoph Hellwig92678552011-12-06 21:58:18 +00001752
Dave Chinner3a8406f2010-04-13 15:06:52 +10001753 mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
Christoph Hellwig92678552011-12-06 21:58:18 +00001754 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755}
1756
Dave Chinner368e1362010-04-13 15:06:50 +10001757/*
1758 * Traverse the freelist of dquots and attempt to reclaim a maximum of
1759 * 'howmany' dquots. This operation races with dqlookup(), and attempts to
1760 * favor the lookup function ...
1761 */
1762STATIC int
1763xfs_qm_shake_freelist(
1764 int howmany)
1765{
1766 int nreclaimed = 0;
1767 xfs_dquot_t *dqp;
1768
1769 if (howmany <= 0)
1770 return 0;
1771
1772 while (nreclaimed < howmany) {
1773 dqp = xfs_qm_dqreclaim_one();
1774 if (!dqp)
1775 return nreclaimed;
1776 xfs_qm_dqdestroy(dqp);
1777 nreclaimed++;
1778 }
1779 return nreclaimed;
1780}
1781
1782/*
1783 * The kmem_shake interface is invoked when memory is running low.
1784 */
1785/* ARGSUSED */
1786STATIC int
Dave Chinner7f8275d2010-07-19 14:56:17 +10001787xfs_qm_shake(
1788 struct shrinker *shrink,
Ying Han1495f232011-05-24 17:12:27 -07001789 struct shrink_control *sc)
Dave Chinner368e1362010-04-13 15:06:50 +10001790{
1791 int ndqused, nfree, n;
Ying Han1495f232011-05-24 17:12:27 -07001792 gfp_t gfp_mask = sc->gfp_mask;
Dave Chinner368e1362010-04-13 15:06:50 +10001793
1794 if (!kmem_shake_allow(gfp_mask))
1795 return 0;
1796 if (!xfs_Gqm)
1797 return 0;
1798
Dave Chinner3a8406f2010-04-13 15:06:52 +10001799 nfree = xfs_Gqm->qm_dqfrlist_cnt; /* free dquots */
Dave Chinner368e1362010-04-13 15:06:50 +10001800 /* incore dquots in all f/s's */
1801 ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
1802
1803 ASSERT(ndqused >= 0);
1804
1805 if (nfree <= ndqused && nfree < ndquot)
1806 return 0;
1807
1808 ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
1809 n = nfree - ndqused - ndquot; /* # over target */
1810
1811 return xfs_qm_shake_freelist(MAX(nfree, n));
1812}
1813
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814
1815/*------------------------------------------------------------------*/
1816
1817/*
1818 * Return a new incore dquot. Depending on the number of
1819 * dquots in the system, we either allocate a new one on the kernel heap,
1820 * or reclaim a free one.
1821 * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
1822 * to reclaim an existing one from the freelist.
1823 */
1824boolean_t
1825xfs_qm_dqalloc_incore(
1826 xfs_dquot_t **O_dqpp)
1827{
1828 xfs_dquot_t *dqp;
1829
1830 /*
1831 * Check against high water mark to see if we want to pop
1832 * a nincompoop dquot off the freelist.
1833 */
1834 if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
1835 /*
1836 * Try to recycle a dquot from the freelist.
1837 */
1838 if ((dqp = xfs_qm_dqreclaim_one())) {
1839 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
1840 /*
1841 * Just zero the core here. The rest will get
1842 * reinitialized by caller. XXX we shouldn't even
1843 * do this zero ...
1844 */
1845 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
1846 *O_dqpp = dqp;
Jesper Juhl014c2542006-01-15 02:37:08 +01001847 return B_FALSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 }
1849 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
1850 }
1851
1852 /*
1853 * Allocate a brand new dquot on the kernel heap and return it
1854 * to the caller to initialize.
1855 */
1856 ASSERT(xfs_Gqm->qm_dqzone != NULL);
1857 *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
1858 atomic_inc(&xfs_Gqm->qm_totaldquots);
1859
Jesper Juhl014c2542006-01-15 02:37:08 +01001860 return B_TRUE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861}
1862
1863
1864/*
1865 * Start a transaction and write the incore superblock changes to
1866 * disk. flags parameter indicates which fields have changed.
1867 */
1868int
1869xfs_qm_write_sb_changes(
1870 xfs_mount_t *mp,
1871 __int64_t flags)
1872{
1873 xfs_trans_t *tp;
1874 int error;
1875
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1877 if ((error = xfs_trans_reserve(tp, 0,
1878 mp->m_sb.sb_sectsize + 128, 0,
1879 0,
1880 XFS_DEFAULT_LOG_COUNT))) {
1881 xfs_trans_cancel(tp, 0);
Jesper Juhl014c2542006-01-15 02:37:08 +01001882 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 }
1884
1885 xfs_mod_sb(tp, flags);
David Chinnere5720ee2008-04-10 12:21:18 +10001886 error = xfs_trans_commit(tp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887
David Chinnere5720ee2008-04-10 12:21:18 +10001888 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889}
1890
1891
1892/* --------------- utility functions for vnodeops ---------------- */
1893
1894
1895/*
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +00001896 * Given an inode, a uid, gid and prid make sure that we have
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1898 * quotas by creating this file.
1899 * This also attaches dquot(s) to the given inode after locking it,
1900 * and returns the dquots corresponding to the uid and/or gid.
1901 *
1902 * in : inode (unlocked)
1903 * out : udquot, gdquot with references taken and unlocked
1904 */
1905int
1906xfs_qm_vop_dqalloc(
Christoph Hellwig7d095252009-06-08 15:33:32 +02001907 struct xfs_inode *ip,
1908 uid_t uid,
1909 gid_t gid,
1910 prid_t prid,
1911 uint flags,
1912 struct xfs_dquot **O_udqpp,
1913 struct xfs_dquot **O_gdqpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001915 struct xfs_mount *mp = ip->i_mount;
1916 struct xfs_dquot *uq, *gq;
1917 int error;
1918 uint lockflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919
Christoph Hellwig7d095252009-06-08 15:33:32 +02001920 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 return 0;
1922
1923 lockflags = XFS_ILOCK_EXCL;
1924 xfs_ilock(ip, lockflags);
1925
Christoph Hellwigbd186aa2007-08-30 17:21:12 +10001926 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 gid = ip->i_d.di_gid;
1928
1929 /*
1930 * Attach the dquot(s) to this inode, doing a dquot allocation
1931 * if necessary. The dquot(s) will not be locked.
1932 */
1933 if (XFS_NOT_DQATTACHED(mp, ip)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001934 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1935 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 xfs_iunlock(ip, lockflags);
Jesper Juhl014c2542006-01-15 02:37:08 +01001937 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 }
1939 }
1940
1941 uq = gq = NULL;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001942 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 if (ip->i_d.di_uid != uid) {
1944 /*
1945 * What we need is the dquot that has this uid, and
1946 * if we send the inode to dqget, the uid of the inode
1947 * takes priority over what's sent in the uid argument.
1948 * We must unlock inode here before calling dqget if
1949 * we're not sending the inode, because otherwise
1950 * we'll deadlock by doing trans_reserve while
1951 * holding ilock.
1952 */
1953 xfs_iunlock(ip, lockflags);
1954 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
1955 XFS_DQ_USER,
1956 XFS_QMOPT_DQALLOC |
1957 XFS_QMOPT_DOWARN,
1958 &uq))) {
1959 ASSERT(error != ENOENT);
Jesper Juhl014c2542006-01-15 02:37:08 +01001960 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 }
1962 /*
1963 * Get the ilock in the right order.
1964 */
1965 xfs_dqunlock(uq);
1966 lockflags = XFS_ILOCK_SHARED;
1967 xfs_ilock(ip, lockflags);
1968 } else {
1969 /*
1970 * Take an extra reference, because we'll return
1971 * this to caller
1972 */
1973 ASSERT(ip->i_udquot);
1974 uq = ip->i_udquot;
1975 xfs_dqlock(uq);
1976 XFS_DQHOLD(uq);
1977 xfs_dqunlock(uq);
1978 }
1979 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001980 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 if (ip->i_d.di_gid != gid) {
1982 xfs_iunlock(ip, lockflags);
1983 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
1984 XFS_DQ_GROUP,
1985 XFS_QMOPT_DQALLOC |
1986 XFS_QMOPT_DOWARN,
1987 &gq))) {
1988 if (uq)
1989 xfs_qm_dqrele(uq);
1990 ASSERT(error != ENOENT);
Jesper Juhl014c2542006-01-15 02:37:08 +01001991 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 }
1993 xfs_dqunlock(gq);
1994 lockflags = XFS_ILOCK_SHARED;
1995 xfs_ilock(ip, lockflags);
1996 } else {
1997 ASSERT(ip->i_gdquot);
1998 gq = ip->i_gdquot;
1999 xfs_dqlock(gq);
2000 XFS_DQHOLD(gq);
2001 xfs_dqunlock(gq);
2002 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002003 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00002004 if (xfs_get_projid(ip) != prid) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002005 xfs_iunlock(ip, lockflags);
2006 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
2007 XFS_DQ_PROJ,
2008 XFS_QMOPT_DQALLOC |
2009 XFS_QMOPT_DOWARN,
2010 &gq))) {
2011 if (uq)
2012 xfs_qm_dqrele(uq);
2013 ASSERT(error != ENOENT);
2014 return (error);
2015 }
2016 xfs_dqunlock(gq);
2017 lockflags = XFS_ILOCK_SHARED;
2018 xfs_ilock(ip, lockflags);
2019 } else {
2020 ASSERT(ip->i_gdquot);
2021 gq = ip->i_gdquot;
2022 xfs_dqlock(gq);
2023 XFS_DQHOLD(gq);
2024 xfs_dqunlock(gq);
2025 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 }
2027 if (uq)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00002028 trace_xfs_dquot_dqalloc(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029
2030 xfs_iunlock(ip, lockflags);
2031 if (O_udqpp)
2032 *O_udqpp = uq;
2033 else if (uq)
2034 xfs_qm_dqrele(uq);
2035 if (O_gdqpp)
2036 *O_gdqpp = gq;
2037 else if (gq)
2038 xfs_qm_dqrele(gq);
Jesper Juhl014c2542006-01-15 02:37:08 +01002039 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040}
2041
2042/*
2043 * Actually transfer ownership, and do dquot modifications.
2044 * These were already reserved.
2045 */
2046xfs_dquot_t *
2047xfs_qm_vop_chown(
2048 xfs_trans_t *tp,
2049 xfs_inode_t *ip,
2050 xfs_dquot_t **IO_olddq,
2051 xfs_dquot_t *newdq)
2052{
2053 xfs_dquot_t *prevdq;
Nathan Scott06d10dd2005-06-21 15:48:47 +10002054 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
2055 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
2056
Christoph Hellwig7d095252009-06-08 15:33:32 +02002057
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10002058 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
2060
2061 /* old dquot */
2062 prevdq = *IO_olddq;
2063 ASSERT(prevdq);
2064 ASSERT(prevdq != newdq);
2065
Nathan Scott06d10dd2005-06-21 15:48:47 +10002066 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
2067 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068
2069 /* the sparkling new dquot */
Nathan Scott06d10dd2005-06-21 15:48:47 +10002070 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
2071 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072
2073 /*
2074 * Take an extra reference, because the inode
2075 * is going to keep this dquot pointer even
2076 * after the trans_commit.
2077 */
2078 xfs_dqlock(newdq);
2079 XFS_DQHOLD(newdq);
2080 xfs_dqunlock(newdq);
2081 *IO_olddq = newdq;
2082
Jesper Juhl014c2542006-01-15 02:37:08 +01002083 return prevdq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084}
2085
2086/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002087 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088 */
2089int
2090xfs_qm_vop_chown_reserve(
2091 xfs_trans_t *tp,
2092 xfs_inode_t *ip,
2093 xfs_dquot_t *udqp,
2094 xfs_dquot_t *gdqp,
2095 uint flags)
2096{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002097 xfs_mount_t *mp = ip->i_mount;
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002098 uint delblks, blkflags, prjflags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002100 int error;
2101
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10002103 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2105
2106 delblks = ip->i_delayed_blks;
2107 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
Nathan Scott06d10dd2005-06-21 15:48:47 +10002108 blkflags = XFS_IS_REALTIME_INODE(ip) ?
2109 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110
2111 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
Christoph Hellwig1149d962005-11-02 15:01:12 +11002112 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 delblksudq = udqp;
2114 /*
2115 * If there are delayed allocation blocks, then we have to
2116 * unreserve those from the old dquot, and add them to the
2117 * new dquot.
2118 */
2119 if (delblks) {
2120 ASSERT(ip->i_udquot);
2121 unresudq = ip->i_udquot;
2122 }
2123 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002124 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002125 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00002126 xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002127 prjflags = XFS_QMOPT_ENOSPC;
2128
2129 if (prjflags ||
2130 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
2131 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10002132 delblksgdq = gdqp;
2133 if (delblks) {
2134 ASSERT(ip->i_gdquot);
2135 unresgdq = ip->i_gdquot;
2136 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 }
2138 }
2139
2140 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2141 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002142 flags | blkflags | prjflags)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 return (error);
2144
2145 /*
2146 * Do the delayed blks reservations/unreservations now. Since, these
2147 * are done without the help of a transaction, if a reservation fails
2148 * its previous reservations won't be automatically undone by trans
2149 * code. So, we have to do it manually here.
2150 */
2151 if (delblks) {
2152 /*
2153 * Do the reservations first. Unreservation can't fail.
2154 */
2155 ASSERT(delblksudq || delblksgdq);
2156 ASSERT(unresudq || unresgdq);
2157 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2158 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
Nathan Scott9a2a7de2006-03-31 13:04:49 +10002159 flags | blkflags | prjflags)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 return (error);
2161 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2162 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
Nathan Scott06d10dd2005-06-21 15:48:47 +10002163 blkflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 }
2165
2166 return (0);
2167}
2168
2169int
2170xfs_qm_vop_rename_dqattach(
Christoph Hellwig7d095252009-06-08 15:33:32 +02002171 struct xfs_inode **i_tab)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002173 struct xfs_mount *mp = i_tab[0]->i_mount;
2174 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175
Christoph Hellwig7d095252009-06-08 15:33:32 +02002176 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Jesper Juhl014c2542006-01-15 02:37:08 +01002177 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178
Christoph Hellwig7d095252009-06-08 15:33:32 +02002179 for (i = 0; (i < 4 && i_tab[i]); i++) {
2180 struct xfs_inode *ip = i_tab[i];
2181 int error;
2182
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183 /*
2184 * Watch out for duplicate entries in the table.
2185 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02002186 if (i == 0 || ip != i_tab[i-1]) {
2187 if (XFS_NOT_DQATTACHED(mp, ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 error = xfs_qm_dqattach(ip, 0);
2189 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +01002190 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 }
2192 }
2193 }
Jesper Juhl014c2542006-01-15 02:37:08 +01002194 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195}
2196
2197void
Christoph Hellwig7d095252009-06-08 15:33:32 +02002198xfs_qm_vop_create_dqattach(
2199 struct xfs_trans *tp,
2200 struct xfs_inode *ip,
2201 struct xfs_dquot *udqp,
2202 struct xfs_dquot *gdqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203{
Christoph Hellwig7d095252009-06-08 15:33:32 +02002204 struct xfs_mount *mp = tp->t_mountp;
2205
2206 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 return;
2208
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10002209 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig7d095252009-06-08 15:33:32 +02002210 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211
2212 if (udqp) {
2213 xfs_dqlock(udqp);
2214 XFS_DQHOLD(udqp);
2215 xfs_dqunlock(udqp);
2216 ASSERT(ip->i_udquot == NULL);
2217 ip->i_udquot = udqp;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002218 ASSERT(XFS_IS_UQUOTA_ON(mp));
Christoph Hellwig1149d962005-11-02 15:01:12 +11002219 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2221 }
2222 if (gdqp) {
2223 xfs_dqlock(gdqp);
2224 XFS_DQHOLD(gdqp);
2225 xfs_dqunlock(gdqp);
2226 ASSERT(ip->i_gdquot == NULL);
2227 ip->i_gdquot = gdqp;
Christoph Hellwig7d095252009-06-08 15:33:32 +02002228 ASSERT(XFS_IS_OQUOTA_ON(mp));
2229 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00002230 ip->i_d.di_gid : xfs_get_projid(ip)) ==
Nathan Scottee2a4f72006-01-11 15:33:36 +11002231 be32_to_cpu(gdqp->q_core.d_id));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2233 }
2234}
2235