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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott4ce31212005-11-02 14:59:41 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott4ce31212005-11-02 14:59:41 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott4ce31212005-11-02 14:59:41 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott4ce31212005-11-02 14:59:41 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
19#include "xfs_fs.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110020#include "xfs_shared.h"
Dave Chinner6ca1c902013-08-12 20:49:26 +100021#include "xfs_format.h"
Dave Chinner239880e2013-10-23 10:50:10 +110022#include "xfs_log_format.h"
Dave Chinner239880e2013-10-23 10:50:10 +110023#include "xfs_trans_resv.h"
Nathan Scotta844f452005-11-02 14:38:42 +110024#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_sb.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110028#include "xfs_ialloc.h"
29#include "xfs_itable.h"
Dave Chinner239880e2013-10-23 10:50:10 +110030#include "xfs_quota.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_error.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_bmap.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110033#include "xfs_bmap_btree.h"
Dave Chinner239880e2013-10-23 10:50:10 +110034#include "xfs_trans.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_trans_space.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include "xfs_qm.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000037#include "xfs_trace.h"
Dave Chinner33479e02012-10-08 21:56:11 +110038#include "xfs_icache.h"
Dave Chinner6fcdc592013-06-03 15:28:46 +100039#include "xfs_cksum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41/*
42 * The global quota manager. There is only one of these for the entire
43 * system, _not_ one per file system. XQM keeps track of the overall
44 * quota functionality, including maintaining the freelist and hash
45 * tables of dquots.
46 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070047STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
Christoph Hellwigba0f32d2005-06-21 15:36:52 +100048STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Dave Chinnercd56a392013-08-28 10:18:07 +100050
51STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052/*
Christoph Hellwigb84a3a92012-03-14 11:53:34 -050053 * We use the batch lookup interface to iterate over the dquots as it
54 * currently is the only interface into the radix tree code that allows
55 * fuzzy lookups instead of exact matches. Holding the lock over multiple
56 * operations is fine as all callers are used either during mount/umount
57 * or quotaoff.
58 */
59#define XFS_DQ_LOOKUP_BATCH 32
60
61STATIC int
62xfs_qm_dquot_walk(
63 struct xfs_mount *mp,
64 int type,
Christoph Hellwig43ff2122012-04-23 15:58:39 +100065 int (*execute)(struct xfs_dquot *dqp, void *data),
66 void *data)
Christoph Hellwigb84a3a92012-03-14 11:53:34 -050067{
68 struct xfs_quotainfo *qi = mp->m_quotainfo;
Chandra Seetharaman329e0872013-06-27 17:25:05 -050069 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -050070 uint32_t next_index;
71 int last_error = 0;
72 int skipped;
73 int nr_found;
74
75restart:
76 skipped = 0;
77 next_index = 0;
78 nr_found = 0;
79
80 while (1) {
81 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
82 int error = 0;
83 int i;
84
85 mutex_lock(&qi->qi_tree_lock);
86 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
87 next_index, XFS_DQ_LOOKUP_BATCH);
88 if (!nr_found) {
89 mutex_unlock(&qi->qi_tree_lock);
90 break;
91 }
92
93 for (i = 0; i < nr_found; i++) {
94 struct xfs_dquot *dqp = batch[i];
95
96 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
97
Christoph Hellwig43ff2122012-04-23 15:58:39 +100098 error = execute(batch[i], data);
Dave Chinner24513372014-06-25 14:58:08 +100099 if (error == -EAGAIN) {
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500100 skipped++;
101 continue;
102 }
Dave Chinner24513372014-06-25 14:58:08 +1000103 if (error && last_error != -EFSCORRUPTED)
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500104 last_error = error;
105 }
106
107 mutex_unlock(&qi->qi_tree_lock);
108
109 /* bail out if the filesystem is corrupted. */
Dave Chinner24513372014-06-25 14:58:08 +1000110 if (last_error == -EFSCORRUPTED) {
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500111 skipped = 0;
112 break;
113 }
114 }
115
116 if (skipped) {
117 delay(1);
118 goto restart;
119 }
120
121 return last_error;
122}
123
124
125/*
126 * Purge a dquot from all tracking data structures and free it.
127 */
128STATIC int
129xfs_qm_dqpurge(
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000130 struct xfs_dquot *dqp,
131 void *data)
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500132{
133 struct xfs_mount *mp = dqp->q_mount;
134 struct xfs_quotainfo *qi = mp->m_quotainfo;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500135
136 xfs_dqlock(dqp);
137 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
138 xfs_dqunlock(dqp);
Dave Chinner24513372014-06-25 14:58:08 +1000139 return -EAGAIN;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500140 }
141
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500142 dqp->dq_flags |= XFS_DQ_FREEING;
143
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000144 xfs_dqflock(dqp);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500145
146 /*
147 * If we are turning this type of quotas off, we don't care
148 * about the dirty metadata sitting in this dquot. OTOH, if
149 * we're unmounting, we do care, so we flush it and wait.
150 */
151 if (XFS_DQ_IS_DIRTY(dqp)) {
Christoph Hellwigfe7257f2012-04-23 15:58:37 +1000152 struct xfs_buf *bp = NULL;
153 int error;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500154
155 /*
156 * We don't care about getting disk errors here. We need
157 * to purge this dquot anyway, so we go ahead regardless.
158 */
Christoph Hellwigfe7257f2012-04-23 15:58:37 +1000159 error = xfs_qm_dqflush(dqp, &bp);
160 if (error) {
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500161 xfs_warn(mp, "%s: dquot %p flush failed",
162 __func__, dqp);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +1000163 } else {
164 error = xfs_bwrite(bp);
165 xfs_buf_relse(bp);
166 }
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500167 xfs_dqflock(dqp);
168 }
169
170 ASSERT(atomic_read(&dqp->q_pincount) == 0);
171 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
172 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
173
174 xfs_dqfunlock(dqp);
175 xfs_dqunlock(dqp);
176
Chandra Seetharaman329e0872013-06-27 17:25:05 -0500177 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500178 be32_to_cpu(dqp->q_core.d_id));
179 qi->qi_dquots--;
180
181 /*
182 * We move dquots to the freelist as soon as their reference count
183 * hits zero, so it really should be on the freelist here.
184 */
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500185 ASSERT(!list_empty(&dqp->q_lru));
Dave Chinnercd56a392013-08-28 10:18:07 +1000186 list_lru_del(&qi->qi_lru, &dqp->q_lru);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500187 XFS_STATS_DEC(xs_qm_dquot_unused);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500188
189 xfs_qm_dqdestroy(dqp);
Jie Liudf8052e2013-11-26 21:38:49 +0800190 return 0;
191}
192
193/*
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500194 * Purge the dquot cache.
195 */
196void
197xfs_qm_dqpurge_all(
198 struct xfs_mount *mp,
199 uint flags)
200{
Dave Chinner3c35337572014-05-05 17:30:15 +1000201 if (flags & XFS_QMOPT_UQUOTA)
202 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500203 if (flags & XFS_QMOPT_GQUOTA)
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000204 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500205 if (flags & XFS_QMOPT_PQUOTA)
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000206 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -0500207}
208
209/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 * Just destroy the quotainfo structure.
211 */
212void
Christoph Hellwig7d095252009-06-08 15:33:32 +0200213xfs_qm_unmount(
214 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
Christoph Hellwig7d095252009-06-08 15:33:32 +0200216 if (mp->m_quotainfo) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +1000217 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 xfs_qm_destroy_quotainfo(mp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200219 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222/*
223 * Called from the vfsops layer.
224 */
Christoph Hellwige57481d2008-12-03 12:20:36 +0100225void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226xfs_qm_unmount_quotas(
227 xfs_mount_t *mp)
228{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 /*
230 * Release the dquots that root inode, et al might be holding,
231 * before we flush quotas and blow away the quotainfo structure.
232 */
233 ASSERT(mp->m_rootip);
234 xfs_qm_dqdetach(mp->m_rootip);
235 if (mp->m_rbmip)
236 xfs_qm_dqdetach(mp->m_rbmip);
237 if (mp->m_rsumip)
238 xfs_qm_dqdetach(mp->m_rsumip);
239
240 /*
Christoph Hellwige57481d2008-12-03 12:20:36 +0100241 * Release the quota inodes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 if (mp->m_quotainfo) {
Christoph Hellwige57481d2008-12-03 12:20:36 +0100244 if (mp->m_quotainfo->qi_uquotaip) {
245 IRELE(mp->m_quotainfo->qi_uquotaip);
246 mp->m_quotainfo->qi_uquotaip = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 }
Christoph Hellwige57481d2008-12-03 12:20:36 +0100248 if (mp->m_quotainfo->qi_gquotaip) {
249 IRELE(mp->m_quotainfo->qi_gquotaip);
250 mp->m_quotainfo->qi_gquotaip = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500252 if (mp->m_quotainfo->qi_pquotaip) {
253 IRELE(mp->m_quotainfo->qi_pquotaip);
254 mp->m_quotainfo->qi_pquotaip = NULL;
255 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257}
258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259STATIC int
260xfs_qm_dqattach_one(
261 xfs_inode_t *ip,
262 xfs_dqid_t id,
263 uint type,
264 uint doalloc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 xfs_dquot_t **IO_idqpp)
266{
267 xfs_dquot_t *dqp;
268 int error;
269
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000270 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 error = 0;
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 /*
Dave Chinner3c35337572014-05-05 17:30:15 +1000274 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
275 * or &i_gdquot. This made the code look weird, but made the logic a lot
276 * simpler.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 */
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100278 dqp = *IO_idqpp;
279 if (dqp) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000280 trace_xfs_dqattach_found(dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100281 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 }
283
284 /*
Dave Chinner3c35337572014-05-05 17:30:15 +1000285 * Find the dquot from somewhere. This bumps the reference count of
286 * dquot and returns it locked. This can return ENOENT if dquot didn't
287 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
288 * turned off suddenly.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 */
Mitsuo Hayasakadb3e74b2011-11-10 01:33:10 +0000290 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
291 doalloc | XFS_QMOPT_DOWARN, &dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100292 if (error)
293 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000295 trace_xfs_dqattach_get(dqp);
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 /*
298 * dqget may have dropped and re-acquired the ilock, but it guarantees
299 * that the dquot returned is the one that should go in the inode.
300 */
301 *IO_idqpp = dqp;
Christoph Hellwig8e9b6e72009-02-08 21:51:42 +0100302 xfs_dqunlock(dqp);
303 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304}
305
Christoph Hellwigb4d05e32012-03-27 10:34:46 -0400306static bool
307xfs_qm_need_dqattach(
308 struct xfs_inode *ip)
309{
310 struct xfs_mount *mp = ip->i_mount;
311
312 if (!XFS_IS_QUOTA_RUNNING(mp))
313 return false;
314 if (!XFS_IS_QUOTA_ON(mp))
315 return false;
316 if (!XFS_NOT_DQATTACHED(mp, ip))
317 return false;
Chandra Seetharaman9cad19d2013-06-27 17:25:04 -0500318 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
Christoph Hellwigb4d05e32012-03-27 10:34:46 -0400319 return false;
320 return true;
321}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000324 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
325 * into account.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 * Inode may get unlocked and relocked in here, and the caller must deal with
328 * the consequences.
329 */
330int
Christoph Hellwig7d095252009-06-08 15:33:32 +0200331xfs_qm_dqattach_locked(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 xfs_inode_t *ip,
333 uint flags)
334{
335 xfs_mount_t *mp = ip->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 int error = 0;
337
Christoph Hellwigb4d05e32012-03-27 10:34:46 -0400338 if (!xfs_qm_need_dqattach(ip))
Jesper Juhl014c2542006-01-15 02:37:08 +0100339 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Christoph Hellwig7d095252009-06-08 15:33:32 +0200341 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Dave Chinner3c35337572014-05-05 17:30:15 +1000343 if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
345 flags & XFS_QMOPT_DQALLOC,
Dave Chinner3c35337572014-05-05 17:30:15 +1000346 &ip->i_udquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 if (error)
348 goto done;
Dave Chinner3c35337572014-05-05 17:30:15 +1000349 ASSERT(ip->i_udquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 }
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000351
Dave Chinner3c35337572014-05-05 17:30:15 +1000352 if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500353 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 flags & XFS_QMOPT_DQALLOC,
Dave Chinner3c35337572014-05-05 17:30:15 +1000355 &ip->i_gdquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 if (error)
357 goto done;
Dave Chinner3c35337572014-05-05 17:30:15 +1000358 ASSERT(ip->i_gdquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 }
360
Dave Chinner3c35337572014-05-05 17:30:15 +1000361 if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500362 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
363 flags & XFS_QMOPT_DQALLOC,
Dave Chinner3c35337572014-05-05 17:30:15 +1000364 &ip->i_pdquot);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500365 if (error)
366 goto done;
Dave Chinner3c35337572014-05-05 17:30:15 +1000367 ASSERT(ip->i_pdquot);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500368 }
369
Dave Chinner3c35337572014-05-05 17:30:15 +1000370done:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 /*
Dave Chinner3c35337572014-05-05 17:30:15 +1000372 * Don't worry about the dquots that we may have attached before any
373 * error - they'll get detached later if it has not already been done.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 */
Christoph Hellwig7d095252009-06-08 15:33:32 +0200375 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig7d095252009-06-08 15:33:32 +0200376 return error;
377}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Christoph Hellwig7d095252009-06-08 15:33:32 +0200379int
380xfs_qm_dqattach(
381 struct xfs_inode *ip,
382 uint flags)
383{
384 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Christoph Hellwigb4d05e32012-03-27 10:34:46 -0400386 if (!xfs_qm_need_dqattach(ip))
387 return 0;
388
Christoph Hellwig7d095252009-06-08 15:33:32 +0200389 xfs_ilock(ip, XFS_ILOCK_EXCL);
390 error = xfs_qm_dqattach_locked(ip, flags);
391 xfs_iunlock(ip, XFS_ILOCK_EXCL);
392
Jesper Juhl014c2542006-01-15 02:37:08 +0100393 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394}
395
396/*
397 * Release dquots (and their references) if any.
398 * The inode should be locked EXCL except when this's called by
399 * xfs_ireclaim.
400 */
401void
402xfs_qm_dqdetach(
403 xfs_inode_t *ip)
404{
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500405 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 return;
407
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000408 trace_xfs_dquot_dqdetach(ip);
409
Chandra Seetharaman9cad19d2013-06-27 17:25:04 -0500410 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 if (ip->i_udquot) {
412 xfs_qm_dqrele(ip->i_udquot);
413 ip->i_udquot = NULL;
414 }
415 if (ip->i_gdquot) {
416 xfs_qm_dqrele(ip->i_gdquot);
417 ip->i_gdquot = NULL;
418 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500419 if (ip->i_pdquot) {
420 xfs_qm_dqrele(ip->i_pdquot);
421 ip->i_pdquot = NULL;
422 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423}
424
Dave Chinnercd56a392013-08-28 10:18:07 +1000425struct xfs_qm_isolate {
426 struct list_head buffers;
427 struct list_head dispose;
428};
429
430static enum lru_status
431xfs_qm_dquot_isolate(
432 struct list_head *item,
Vladimir Davydov3f97b162015-02-12 14:59:35 -0800433 struct list_lru_one *lru,
Dave Chinnercd56a392013-08-28 10:18:07 +1000434 spinlock_t *lru_lock,
435 void *arg)
Dave Chinnerbf1ed382014-09-29 10:43:40 +1000436 __releases(lru_lock) __acquires(lru_lock)
Dave Chinnercd56a392013-08-28 10:18:07 +1000437{
438 struct xfs_dquot *dqp = container_of(item,
439 struct xfs_dquot, q_lru);
440 struct xfs_qm_isolate *isol = arg;
441
442 if (!xfs_dqlock_nowait(dqp))
443 goto out_miss_busy;
444
445 /*
446 * This dquot has acquired a reference in the meantime remove it from
447 * the freelist and try again.
448 */
449 if (dqp->q_nrefs) {
450 xfs_dqunlock(dqp);
451 XFS_STATS_INC(xs_qm_dqwants);
452
453 trace_xfs_dqreclaim_want(dqp);
Vladimir Davydov3f97b162015-02-12 14:59:35 -0800454 list_lru_isolate(lru, &dqp->q_lru);
Dave Chinnercd56a392013-08-28 10:18:07 +1000455 XFS_STATS_DEC(xs_qm_dquot_unused);
Dave Chinner35163412013-08-28 10:18:08 +1000456 return LRU_REMOVED;
Dave Chinnercd56a392013-08-28 10:18:07 +1000457 }
458
459 /*
460 * If the dquot is dirty, flush it. If it's already being flushed, just
461 * skip it so there is time for the IO to complete before we try to
462 * reclaim it again on the next LRU pass.
463 */
464 if (!xfs_dqflock_nowait(dqp)) {
465 xfs_dqunlock(dqp);
466 goto out_miss_busy;
467 }
468
469 if (XFS_DQ_IS_DIRTY(dqp)) {
470 struct xfs_buf *bp = NULL;
471 int error;
472
473 trace_xfs_dqreclaim_dirty(dqp);
474
475 /* we have to drop the LRU lock to flush the dquot */
476 spin_unlock(lru_lock);
477
478 error = xfs_qm_dqflush(dqp, &bp);
479 if (error) {
480 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
481 __func__, dqp);
482 goto out_unlock_dirty;
483 }
484
485 xfs_buf_delwri_queue(bp, &isol->buffers);
486 xfs_buf_relse(bp);
487 goto out_unlock_dirty;
488 }
489 xfs_dqfunlock(dqp);
490
491 /*
492 * Prevent lookups now that we are past the point of no return.
493 */
494 dqp->dq_flags |= XFS_DQ_FREEING;
495 xfs_dqunlock(dqp);
496
497 ASSERT(dqp->q_nrefs == 0);
Vladimir Davydov3f97b162015-02-12 14:59:35 -0800498 list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
Dave Chinnercd56a392013-08-28 10:18:07 +1000499 XFS_STATS_DEC(xs_qm_dquot_unused);
500 trace_xfs_dqreclaim_done(dqp);
501 XFS_STATS_INC(xs_qm_dqreclaims);
Dave Chinner35163412013-08-28 10:18:08 +1000502 return LRU_REMOVED;
Dave Chinnercd56a392013-08-28 10:18:07 +1000503
504out_miss_busy:
505 trace_xfs_dqreclaim_busy(dqp);
506 XFS_STATS_INC(xs_qm_dqreclaim_misses);
Dave Chinner35163412013-08-28 10:18:08 +1000507 return LRU_SKIP;
Dave Chinnercd56a392013-08-28 10:18:07 +1000508
509out_unlock_dirty:
510 trace_xfs_dqreclaim_busy(dqp);
511 XFS_STATS_INC(xs_qm_dqreclaim_misses);
Dave Chinner35163412013-08-28 10:18:08 +1000512 xfs_dqunlock(dqp);
513 spin_lock(lru_lock);
514 return LRU_RETRY;
Dave Chinnercd56a392013-08-28 10:18:07 +1000515}
516
Andrew Morton2f5b56f2013-08-28 10:18:08 +1000517static unsigned long
Dave Chinnercd56a392013-08-28 10:18:07 +1000518xfs_qm_shrink_scan(
519 struct shrinker *shrink,
520 struct shrink_control *sc)
521{
522 struct xfs_quotainfo *qi = container_of(shrink,
523 struct xfs_quotainfo, qi_shrinker);
524 struct xfs_qm_isolate isol;
Andrew Morton2f5b56f2013-08-28 10:18:08 +1000525 unsigned long freed;
Dave Chinnercd56a392013-08-28 10:18:07 +1000526 int error;
Dave Chinnercd56a392013-08-28 10:18:07 +1000527
528 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
529 return 0;
530
531 INIT_LIST_HEAD(&isol.buffers);
532 INIT_LIST_HEAD(&isol.dispose);
533
Vladimir Davydov503c3582015-02-12 14:58:47 -0800534 freed = list_lru_shrink_walk(&qi->qi_lru, sc,
535 xfs_qm_dquot_isolate, &isol);
Dave Chinnercd56a392013-08-28 10:18:07 +1000536
537 error = xfs_buf_delwri_submit(&isol.buffers);
538 if (error)
539 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
540
541 while (!list_empty(&isol.dispose)) {
542 struct xfs_dquot *dqp;
543
544 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
545 list_del_init(&dqp->q_lru);
546 xfs_qm_dqfree_one(dqp);
547 }
548
549 return freed;
550}
551
Andrew Morton2f5b56f2013-08-28 10:18:08 +1000552static unsigned long
Dave Chinnercd56a392013-08-28 10:18:07 +1000553xfs_qm_shrink_count(
554 struct shrinker *shrink,
555 struct shrink_control *sc)
556{
557 struct xfs_quotainfo *qi = container_of(shrink,
558 struct xfs_quotainfo, qi_shrinker);
559
Vladimir Davydov503c3582015-02-12 14:58:47 -0800560 return list_lru_shrink_count(&qi->qi_lru, sc);
Dave Chinnercd56a392013-08-28 10:18:07 +1000561}
562
Christoph Hellwiga4edd1d2009-01-19 02:03:11 +0100563/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 * This initializes all the quota information that's kept in the
565 * mount structure
566 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000567STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568xfs_qm_init_quotainfo(
569 xfs_mount_t *mp)
570{
571 xfs_quotainfo_t *qinf;
572 int error;
573 xfs_dquot_t *dqp;
574
575 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
576
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
578
Dave Chinner24513372014-06-25 14:58:08 +1000579 error = list_lru_init(&qinf->qi_lru);
Dave Chinneree4eec42014-05-15 09:23:24 +1000580 if (error)
581 goto out_free_qinf;
Glauber Costa5ca302c2013-08-28 10:18:18 +1000582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 /*
584 * See if quotainodes are setup, and if not, allocate them,
585 * and change the superblock accordingly.
586 */
Dave Chinneree4eec42014-05-15 09:23:24 +1000587 error = xfs_qm_init_quotainos(mp);
588 if (error)
589 goto out_free_lru;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000591 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
592 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500593 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000594 mutex_init(&qinf->qi_tree_lock);
595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 /* mutex used to serialize quotaoffs */
Jes Sorensen794ee1b2006-01-09 15:59:21 -0800597 mutex_init(&qinf->qi_quotaofflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
599 /* Precalc some constants */
600 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
Eric Sandeen6ea94bb2014-04-14 19:03:34 +1000601 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
603 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
604
605 /*
606 * We try to get the limits from the superuser's limits fields.
607 * This is quite hacky, but it is standard quota practice.
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000608 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 * We look at the USR dquot with id == 0 first, but if user quotas
610 * are not enabled we goto the GRP dquot with id == 0.
611 * We don't really care to keep separate default limits for user
612 * and group quotas, at least not at this point.
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000613 *
614 * Since we may not have done a quotacheck by this point, just read
615 * the dquot without attaching it to any hashtables or lists.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 */
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000617 error = xfs_qm_dqread(mp, 0,
618 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
619 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
620 XFS_DQ_PROJ),
621 XFS_QMOPT_DOWARN, &dqp);
622 if (!error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 xfs_disk_dquot_t *ddqp = &dqp->q_core;
624
625 /*
626 * The warnings and timers set the grace period given to
627 * a user or group before he or she can not perform any
628 * more writing. If it is zero, a default is used.
629 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100630 qinf->qi_btimelimit = ddqp->d_btimer ?
631 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
632 qinf->qi_itimelimit = ddqp->d_itimer ?
633 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
634 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
635 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
636 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
637 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
638 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
639 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
640 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
641 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
642 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
643 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
644 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
645 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
646 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
647 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
Dave Chinneree4eec42014-05-15 09:23:24 +1000648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 xfs_qm_dqdestroy(dqp);
650 } else {
651 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
652 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
653 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
654 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
655 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
Nathan Scott06d10dd2005-06-21 15:48:47 +1000656 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 }
658
Dave Chinnercd56a392013-08-28 10:18:07 +1000659 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
660 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000661 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
Dave Chinnercd56a392013-08-28 10:18:07 +1000662 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000663 register_shrinker(&qinf->qi_shrinker);
Jesper Juhl014c2542006-01-15 02:37:08 +0100664 return 0;
Dave Chinneree4eec42014-05-15 09:23:24 +1000665
666out_free_lru:
667 list_lru_destroy(&qinf->qi_lru);
668out_free_qinf:
669 kmem_free(qinf);
670 mp->m_quotainfo = NULL;
671 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672}
673
674
675/*
676 * Gets called when unmounting a filesystem or when all quotas get
677 * turned off.
678 * This purges the quota inodes, destroys locks and frees itself.
679 */
680void
681xfs_qm_destroy_quotainfo(
682 xfs_mount_t *mp)
683{
684 xfs_quotainfo_t *qi;
685
686 qi = mp->m_quotainfo;
687 ASSERT(qi != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000689 unregister_shrinker(&qi->qi_shrinker);
Glauber Costaf5e1dd32013-08-28 10:18:18 +1000690 list_lru_destroy(&qi->qi_lru);
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000691
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 if (qi->qi_uquotaip) {
Christoph Hellwig26cc0022008-07-18 17:12:43 +1000693 IRELE(qi->qi_uquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 qi->qi_uquotaip = NULL; /* paranoia */
695 }
696 if (qi->qi_gquotaip) {
Christoph Hellwig26cc0022008-07-18 17:12:43 +1000697 IRELE(qi->qi_gquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 qi->qi_gquotaip = NULL;
699 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500700 if (qi->qi_pquotaip) {
701 IRELE(qi->qi_pquotaip);
702 qi->qi_pquotaip = NULL;
703 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 mutex_destroy(&qi->qi_quotaofflock);
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000705 kmem_free(qi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 mp->m_quotainfo = NULL;
707}
708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709/*
710 * Create an inode and return with a reference already taken, but unlocked
711 * This is how we create quota inodes
712 */
713STATIC int
714xfs_qm_qino_alloc(
715 xfs_mount_t *mp,
716 xfs_inode_t **ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 uint flags)
718{
719 xfs_trans_t *tp;
720 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 int committed;
Dave Chinner58c90472015-02-23 22:38:08 +1100722 bool need_alloc = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Chandra Seetharamand892d582013-07-19 17:36:02 -0500724 *ip = NULL;
725 /*
726 * With superblock that doesn't have separate pquotino, we
727 * share an inode between gquota and pquota. If the on-disk
728 * superblock has GQUOTA and the filesystem is now mounted
729 * with PQUOTA, just use sb_gquotino for sb_pquotino and
730 * vice-versa.
731 */
732 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
733 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
734 xfs_ino_t ino = NULLFSINO;
735
736 if ((flags & XFS_QMOPT_PQUOTA) &&
737 (mp->m_sb.sb_gquotino != NULLFSINO)) {
738 ino = mp->m_sb.sb_gquotino;
739 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
740 } else if ((flags & XFS_QMOPT_GQUOTA) &&
741 (mp->m_sb.sb_pquotino != NULLFSINO)) {
742 ino = mp->m_sb.sb_pquotino;
743 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
744 }
745 if (ino != NULLFSINO) {
746 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
747 if (error)
748 return error;
749 mp->m_sb.sb_gquotino = NULLFSINO;
750 mp->m_sb.sb_pquotino = NULLFSINO;
Dave Chinner58c90472015-02-23 22:38:08 +1100751 need_alloc = false;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500752 }
753 }
754
Nathan Scott061f7202006-01-11 15:27:50 +1100755 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000756 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
757 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
758 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 xfs_trans_cancel(tp, 0);
Jesper Juhl014c2542006-01-15 02:37:08 +0100760 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Dave Chinner58c90472015-02-23 22:38:08 +1100763 if (need_alloc) {
Chandra Seetharamand892d582013-07-19 17:36:02 -0500764 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
765 &committed);
766 if (error) {
767 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
768 XFS_TRANS_ABORT);
769 return error;
770 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 }
772
773 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 * Make the changes in the superblock, and log those too.
775 * sbfields arg may contain fields other than *QUOTINO;
776 * VERSIONNUM for example.
777 */
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000778 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 if (flags & XFS_QMOPT_SBVERSION) {
Eric Sandeen62118702008-03-06 13:44:28 +1100780 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
Eric Sandeen62118702008-03-06 13:44:28 +1100782 xfs_sb_version_addquota(&mp->m_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 mp->m_sb.sb_uquotino = NULLFSINO;
784 mp->m_sb.sb_gquotino = NULLFSINO;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500785 mp->m_sb.sb_pquotino = NULLFSINO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
Chandra Seetharamand892d582013-07-19 17:36:02 -0500787 /* qflags will get updated fully _after_ quotacheck */
788 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 }
790 if (flags & XFS_QMOPT_UQUOTA)
791 mp->m_sb.sb_uquotino = (*ip)->i_ino;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500792 else if (flags & XFS_QMOPT_GQUOTA)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 mp->m_sb.sb_gquotino = (*ip)->i_ino;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500794 else
795 mp->m_sb.sb_pquotino = (*ip)->i_ino;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000796 spin_unlock(&mp->m_sb_lock);
Dave Chinner61e63ec2015-01-22 09:10:31 +1100797 xfs_log_sb(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Dave Chinner58c90472015-02-23 22:38:08 +1100799 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
800 if (error) {
801 ASSERT(XFS_FORCED_SHUTDOWN(mp));
Dave Chinner53487782011-03-07 10:05:35 +1100802 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 }
Dave Chinner58c90472015-02-23 22:38:08 +1100804 if (need_alloc)
805 xfs_finish_inode_setup(*ip);
806 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807}
808
809
David Chinner5b139732008-04-10 12:20:10 +1000810STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811xfs_qm_reset_dqcounts(
812 xfs_mount_t *mp,
813 xfs_buf_t *bp,
814 xfs_dqid_t id,
815 uint type)
816{
Dave Chinner6fcdc592013-06-03 15:28:46 +1000817 struct xfs_dqblk *dqb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 int j;
819
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000820 trace_xfs_reset_dqcounts(bp, _RET_IP_);
821
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 /*
823 * Reset all counters and timers. They'll be
824 * started afresh by xfs_qm_quotacheck.
825 */
826#ifdef DEBUG
827 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
828 do_div(j, sizeof(xfs_dqblk_t));
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000829 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830#endif
Dave Chinner6fcdc592013-06-03 15:28:46 +1000831 dqb = bp->b_addr;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000832 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
Dave Chinner6fcdc592013-06-03 15:28:46 +1000833 struct xfs_disk_dquot *ddq;
834
835 ddq = (struct xfs_disk_dquot *)&dqb[j];
836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 /*
838 * Do a sanity check, and if needed, repair the dqblk. Don't
839 * output any warnings because it's perfectly possible to
Dave Chinner9aede1d2013-10-15 09:17:52 +1100840 * find uninitialised dquot blks. See comment in xfs_dqcheck.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 */
Dave Chinner9aede1d2013-10-15 09:17:52 +1100842 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
843 "xfs_quotacheck");
Jan Karadfcc70a2015-02-23 22:34:17 +1100844 /*
845 * Reset type in case we are reusing group quota file for
846 * project quotas or vice versa
847 */
848 ddq->d_flags = type;
Christoph Hellwig1149d962005-11-02 15:01:12 +1100849 ddq->d_bcount = 0;
850 ddq->d_icount = 0;
851 ddq->d_rtbcount = 0;
852 ddq->d_btimer = 0;
853 ddq->d_itimer = 0;
854 ddq->d_rtbtimer = 0;
855 ddq->d_bwarns = 0;
856 ddq->d_iwarns = 0;
857 ddq->d_rtbwarns = 0;
Dave Chinner6fcdc592013-06-03 15:28:46 +1000858
859 if (xfs_sb_version_hascrc(&mp->m_sb)) {
860 xfs_update_cksum((char *)&dqb[j],
861 sizeof(struct xfs_dqblk),
862 XFS_DQUOT_CRC_OFF);
863 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865}
866
867STATIC int
868xfs_qm_dqiter_bufs(
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000869 struct xfs_mount *mp,
870 xfs_dqid_t firstid,
871 xfs_fsblock_t bno,
872 xfs_filblks_t blkcnt,
873 uint flags,
874 struct list_head *buffer_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875{
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000876 struct xfs_buf *bp;
877 int error;
878 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879
880 ASSERT(blkcnt > 0);
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000881 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
882 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 error = 0;
884
885 /*
886 * Blkcnt arg can be a very big number, and might even be
887 * larger than the log itself. So, we have to break it up into
888 * manageable-sized transactions.
889 * Note that we don't start a permanent transaction here; we might
890 * not be able to get a log reservation for the whole thing up front,
891 * and we don't really care to either, because we just discard
892 * everything if we were to crash in the middle of this loop.
893 */
894 while (blkcnt--) {
895 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
896 XFS_FSB_TO_DADDR(mp, bno),
Dave Chinnerc6319192012-11-14 17:50:13 +1100897 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
Dave Chinner1813dd62012-11-14 17:54:40 +1100898 &xfs_dquot_buf_ops);
Dave Chinner6fcdc592013-06-03 15:28:46 +1000899
900 /*
901 * CRC and validation errors will return a EFSCORRUPTED here. If
902 * this occurs, re-read without CRC validation so that we can
903 * repair the damage via xfs_qm_reset_dqcounts(). This process
904 * will leave a trace in the log indicating corruption has
905 * been detected.
906 */
Dave Chinner24513372014-06-25 14:58:08 +1000907 if (error == -EFSCORRUPTED) {
Dave Chinner6fcdc592013-06-03 15:28:46 +1000908 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
909 XFS_FSB_TO_DADDR(mp, bno),
910 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
911 NULL);
912 }
913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 if (error)
915 break;
916
Dave Chinner5fd364f2014-08-04 12:43:26 +1000917 /*
918 * A corrupt buffer might not have a verifier attached, so
919 * make sure we have the correct one attached before writeback
920 * occurs.
921 */
922 bp->b_ops = &xfs_dquot_buf_ops;
David Chinner5b139732008-04-10 12:20:10 +1000923 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000924 xfs_buf_delwri_queue(bp, buffer_list);
Christoph Hellwig61551f12011-08-23 08:28:06 +0000925 xfs_buf_relse(bp);
Dave Chinner6fcdc592013-06-03 15:28:46 +1000926
927 /* goto the next block. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 bno++;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000929 firstid += mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 }
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000931
Jesper Juhl014c2542006-01-15 02:37:08 +0100932 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933}
934
935/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000936 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 * caller supplied function for every chunk of dquots that we find.
938 */
939STATIC int
940xfs_qm_dqiterate(
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000941 struct xfs_mount *mp,
942 struct xfs_inode *qip,
943 uint flags,
944 struct list_head *buffer_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945{
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000946 struct xfs_bmbt_irec *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 int i, nmaps; /* number of map entries */
948 int error; /* return value */
949 xfs_fileoff_t lblkno;
950 xfs_filblks_t maxlblkcnt;
951 xfs_dqid_t firstid;
952 xfs_fsblock_t rablkno;
953 xfs_filblks_t rablkcnt;
954
955 error = 0;
956 /*
Nathan Scottc41564b2006-03-29 08:55:14 +1000957 * This looks racy, but we can't keep an inode lock across a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 * trans_reserve. But, this gets called during quotacheck, and that
959 * happens only at mount time which is single threaded.
960 */
961 if (qip->i_d.di_nblocks == 0)
Jesper Juhl014c2542006-01-15 02:37:08 +0100962 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
964 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
965
966 lblkno = 0;
Dave Chinner32972382012-06-08 15:44:54 +1000967 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 do {
Christoph Hellwigda51d322013-12-06 12:30:14 -0800969 uint lock_mode;
970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 nmaps = XFS_DQITER_MAP_SIZE;
972 /*
973 * We aren't changing the inode itself. Just changing
974 * some of its data. No new blocks are added here, and
975 * the inode is never added to the transaction.
976 */
Christoph Hellwigda51d322013-12-06 12:30:14 -0800977 lock_mode = xfs_ilock_data_map_shared(qip);
Dave Chinner5c8ed202011-09-18 20:40:45 +0000978 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
979 map, &nmaps, 0);
Christoph Hellwigda51d322013-12-06 12:30:14 -0800980 xfs_iunlock(qip, lock_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 if (error)
982 break;
983
984 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
985 for (i = 0; i < nmaps; i++) {
986 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
987 ASSERT(map[i].br_blockcount);
988
989
990 lblkno += map[i].br_blockcount;
991
992 if (map[i].br_startblock == HOLESTARTBLOCK)
993 continue;
994
995 firstid = (xfs_dqid_t) map[i].br_startoff *
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000996 mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 /*
998 * Do a read-ahead on the next extent.
999 */
1000 if ((i+1 < nmaps) &&
1001 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1002 rablkcnt = map[i+1].br_blockcount;
1003 rablkno = map[i+1].br_startblock;
1004 while (rablkcnt--) {
Christoph Hellwig1a1a3e92010-10-06 18:41:18 +00001005 xfs_buf_readahead(mp->m_ddev_targp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 XFS_FSB_TO_DADDR(mp, rablkno),
Dave Chinnerc3f8fc72012-11-12 22:54:01 +11001007 mp->m_quotainfo->qi_dqchunklen,
Dave Chinner5fd364f2014-08-04 12:43:26 +10001008 &xfs_dquot_buf_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 rablkno++;
1010 }
1011 }
1012 /*
1013 * Iterate thru all the blks in the extent and
1014 * reset the counters of all the dquots inside them.
1015 */
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001016 error = xfs_qm_dqiter_bufs(mp, firstid,
1017 map[i].br_startblock,
1018 map[i].br_blockcount,
1019 flags, buffer_list);
1020 if (error)
1021 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 } while (nmaps > 0);
1024
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001025out:
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10001026 kmem_free(map);
Jesper Juhl014c2542006-01-15 02:37:08 +01001027 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028}
1029
1030/*
1031 * Called by dqusage_adjust in doing a quotacheck.
Christoph Hellwig52fda112010-09-06 01:44:22 +00001032 *
1033 * Given the inode, and a dquot id this updates both the incore dqout as well
1034 * as the buffer copy. This is so that once the quotacheck is done, we can
1035 * just log all the buffers, as opposed to logging numerous updates to
1036 * individual dquots.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001038STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039xfs_qm_quotacheck_dqadjust(
Christoph Hellwig52fda112010-09-06 01:44:22 +00001040 struct xfs_inode *ip,
1041 xfs_dqid_t id,
1042 uint type,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 xfs_qcnt_t nblks,
1044 xfs_qcnt_t rtblks)
1045{
Christoph Hellwig52fda112010-09-06 01:44:22 +00001046 struct xfs_mount *mp = ip->i_mount;
1047 struct xfs_dquot *dqp;
1048 int error;
1049
1050 error = xfs_qm_dqget(mp, ip, id, type,
1051 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1052 if (error) {
1053 /*
1054 * Shouldn't be able to turn off quotas here.
1055 */
Dave Chinner24513372014-06-25 14:58:08 +10001056 ASSERT(error != -ESRCH);
1057 ASSERT(error != -ENOENT);
Christoph Hellwig52fda112010-09-06 01:44:22 +00001058 return error;
1059 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001060
1061 trace_xfs_dqadjust(dqp);
1062
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 /*
1064 * Adjust the inode count and the block count to reflect this inode's
1065 * resource usage.
1066 */
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001067 be64_add_cpu(&dqp->q_core.d_icount, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 dqp->q_res_icount++;
1069 if (nblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001070 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 dqp->q_res_bcount += nblks;
1072 }
1073 if (rtblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001074 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 dqp->q_res_rtbcount += rtblks;
1076 }
1077
1078 /*
1079 * Set default limits, adjust timers (since we changed usages)
Christoph Hellwig191f8482010-04-20 17:01:53 +10001080 *
1081 * There are no timers for the default values set in the root dquot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 */
Christoph Hellwig191f8482010-04-20 17:01:53 +10001083 if (dqp->q_core.d_id) {
Brian Foster4b6eae2e2013-03-18 10:51:45 -04001084 xfs_qm_adjust_dqlimits(mp, dqp);
Christoph Hellwig52fda112010-09-06 01:44:22 +00001085 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 }
1087
1088 dqp->dq_flags |= XFS_DQ_DIRTY;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001089 xfs_qm_dqput(dqp);
1090 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091}
1092
1093STATIC int
1094xfs_qm_get_rtblks(
1095 xfs_inode_t *ip,
1096 xfs_qcnt_t *O_rtblks)
1097{
1098 xfs_filblks_t rtblks; /* total rt blks */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001099 xfs_extnum_t idx; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 xfs_ifork_t *ifp; /* inode fork pointer */
1101 xfs_extnum_t nextents; /* number of extent entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 int error;
1103
1104 ASSERT(XFS_IS_REALTIME_INODE(ip));
1105 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1106 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1107 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
Jesper Juhl014c2542006-01-15 02:37:08 +01001108 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 }
1110 rtblks = 0;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001111 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10001112 for (idx = 0; idx < nextents; idx++)
1113 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 *O_rtblks = (xfs_qcnt_t)rtblks;
Jesper Juhl014c2542006-01-15 02:37:08 +01001115 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116}
1117
1118/*
1119 * callback routine supplied to bulkstat(). Given an inumber, find its
1120 * dquots and update them to account for resources taken by that inode.
1121 */
1122/* ARGSUSED */
1123STATIC int
1124xfs_qm_dqusage_adjust(
1125 xfs_mount_t *mp, /* mount point for filesystem */
1126 xfs_ino_t ino, /* inode number to get data for */
1127 void __user *buffer, /* not used */
1128 int ubsize, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 int *ubused, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 int *res) /* result code value */
1131{
1132 xfs_inode_t *ip;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001133 xfs_qcnt_t nblks, rtblks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 int error;
1135
1136 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1137
1138 /*
1139 * rootino must have its resources accounted for, not so with the quota
1140 * inodes.
1141 */
Chandra Seetharaman9cad19d2013-06-27 17:25:04 -05001142 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 *res = BULKSTAT_RV_NOTHING;
Dave Chinner24513372014-06-25 14:58:08 +10001144 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 }
1146
1147 /*
1148 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1149 * interface expects the inode to be exclusively locked because that's
1150 * the case in all other instances. It's OK that we do this because
1151 * quotacheck is done only at mount time.
1152 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001153 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1154 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 *res = BULKSTAT_RV_NOTHING;
Jesper Juhl014c2542006-01-15 02:37:08 +01001156 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 }
1158
Christoph Hellwig52fda112010-09-06 01:44:22 +00001159 ASSERT(ip->i_delayed_blks == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
Christoph Hellwig52fda112010-09-06 01:44:22 +00001161 if (XFS_IS_REALTIME_INODE(ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 /*
1163 * Walk thru the extent list and count the realtime blocks.
1164 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001165 error = xfs_qm_get_rtblks(ip, &rtblks);
1166 if (error)
1167 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169
Christoph Hellwig52fda112010-09-06 01:44:22 +00001170 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
1172 /*
1173 * Add the (disk blocks and inode) resources occupied by this
1174 * inode to its dquots. We do this adjustment in the incore dquot,
1175 * and also copy the changes to its buffer.
1176 * We don't care about putting these changes in a transaction
1177 * envelope because if we crash in the middle of a 'quotacheck'
1178 * we have to start from the beginning anyway.
1179 * Once we're done, we'll log all the dquot bufs.
1180 *
Nathan Scottc41564b2006-03-29 08:55:14 +10001181 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1183 */
1184 if (XFS_IS_UQUOTA_ON(mp)) {
Christoph Hellwig52fda112010-09-06 01:44:22 +00001185 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1186 XFS_DQ_USER, nblks, rtblks);
1187 if (error)
1188 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190
Christoph Hellwig52fda112010-09-06 01:44:22 +00001191 if (XFS_IS_GQUOTA_ON(mp)) {
1192 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1193 XFS_DQ_GROUP, nblks, rtblks);
1194 if (error)
1195 goto error0;
1196 }
1197
1198 if (XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001199 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
Christoph Hellwig52fda112010-09-06 01:44:22 +00001200 XFS_DQ_PROJ, nblks, rtblks);
1201 if (error)
1202 goto error0;
1203 }
1204
1205 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1206 IRELE(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 *res = BULKSTAT_RV_DIDONE;
Jesper Juhl014c2542006-01-15 02:37:08 +01001208 return 0;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001209
1210error0:
1211 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1212 IRELE(ip);
1213 *res = BULKSTAT_RV_GIVEUP;
1214 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215}
1216
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001217STATIC int
1218xfs_qm_flush_one(
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001219 struct xfs_dquot *dqp,
1220 void *data)
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001221{
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001222 struct list_head *buffer_list = data;
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001223 struct xfs_buf *bp = NULL;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001224 int error = 0;
1225
1226 xfs_dqlock(dqp);
1227 if (dqp->dq_flags & XFS_DQ_FREEING)
1228 goto out_unlock;
1229 if (!XFS_DQ_IS_DIRTY(dqp))
1230 goto out_unlock;
1231
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001232 xfs_dqflock(dqp);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001233 error = xfs_qm_dqflush(dqp, &bp);
1234 if (error)
1235 goto out_unlock;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001236
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001237 xfs_buf_delwri_queue(bp, buffer_list);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001238 xfs_buf_relse(bp);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001239out_unlock:
1240 xfs_dqunlock(dqp);
1241 return error;
1242}
1243
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244/*
1245 * Walk thru all the filesystem inodes and construct a consistent view
1246 * of the disk quota world. If the quotacheck fails, disable quotas.
1247 */
Jie Liueb866bb2014-07-24 20:49:57 +10001248STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249xfs_qm_quotacheck(
1250 xfs_mount_t *mp)
1251{
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001252 int done, count, error, error2;
1253 xfs_ino_t lastino;
1254 size_t structsz;
1255 uint flags;
1256 LIST_HEAD (buffer_list);
1257 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1258 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001259 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261 count = INT_MAX;
1262 structsz = 1;
1263 lastino = 0;
1264 flags = 0;
1265
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001266 ASSERT(uip || gip || pip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1268
Dave Chinner0b932cc2011-03-07 10:08:35 +11001269 xfs_notice(mp, "Quotacheck needed: Please wait.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
1271 /*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001272 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 * their counters to zero. We need a clean slate.
1274 * We don't log our changes till later.
1275 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001276 if (uip) {
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001277 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1278 &buffer_list);
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001279 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 goto error_return;
1281 flags |= XFS_UQUOTA_CHKD;
1282 }
1283
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001284 if (gip) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001285 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001286 &buffer_list);
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001287 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 goto error_return;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001289 flags |= XFS_GQUOTA_CHKD;
1290 }
1291
1292 if (pip) {
1293 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1294 &buffer_list);
1295 if (error)
1296 goto error_return;
1297 flags |= XFS_PQUOTA_CHKD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 }
1299
1300 do {
1301 /*
1302 * Iterate thru all the inodes in the file system,
1303 * adjusting the corresponding dquot counters in core.
1304 */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001305 error = xfs_bulkstat(mp, &lastino, &count,
1306 xfs_qm_dqusage_adjust,
1307 structsz, NULL, &done);
1308 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 break;
1310
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001311 } while (!done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
1313 /*
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001314 * We've made all the changes that we need to make incore. Flush them
1315 * down to disk buffers if everything was updated successfully.
David Chinner4b8879d2008-04-10 12:20:17 +10001316 */
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001317 if (XFS_IS_UQUOTA_ON(mp)) {
1318 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1319 &buffer_list);
1320 }
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001321 if (XFS_IS_GQUOTA_ON(mp)) {
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001322 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1323 &buffer_list);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001324 if (!error)
1325 error = error2;
1326 }
1327 if (XFS_IS_PQUOTA_ON(mp)) {
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001328 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1329 &buffer_list);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001330 if (!error)
1331 error = error2;
1332 }
David Chinner4b8879d2008-04-10 12:20:17 +10001333
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001334 error2 = xfs_buf_delwri_submit(&buffer_list);
1335 if (!error)
1336 error = error2;
1337
David Chinner4b8879d2008-04-10 12:20:17 +10001338 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 * We can get this error if we couldn't do a dquot allocation inside
1340 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1341 * dirty dquots that might be cached, we just want to get rid of them
1342 * and turn quotaoff. The dquots won't be attached to any of the inodes
1343 * at this point (because we intentionally didn't in dqget_noattach).
1344 */
1345 if (error) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +10001346 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 goto error_return;
1348 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349
1350 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 * If one type of quotas is off, then it will lose its
1352 * quotachecked status, since we won't be doing accounting for
1353 * that type anymore.
1354 */
Chandra Seetharaman4177af32012-01-23 17:31:43 +00001355 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 mp->m_qflags |= flags;
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 error_return:
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001359 while (!list_empty(&buffer_list)) {
1360 struct xfs_buf *bp =
1361 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1362 list_del_init(&bp->b_list);
1363 xfs_buf_relse(bp);
1364 }
1365
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 if (error) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001367 xfs_warn(mp,
1368 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1369 error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 /*
1371 * We must turn off quotas.
1372 */
1373 ASSERT(mp->m_quotainfo != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 xfs_qm_destroy_quotainfo(mp);
David Chinner31d55772008-04-10 12:20:38 +10001375 if (xfs_mount_reset_sbqflags(mp)) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001376 xfs_warn(mp,
1377 "Quotacheck: Failed to reset quota flags.");
David Chinner31d55772008-04-10 12:20:38 +10001378 }
Dave Chinner0b932cc2011-03-07 10:08:35 +11001379 } else
1380 xfs_notice(mp, "Quotacheck: Done.");
Eric Sandeend99831f2014-06-22 15:03:54 +10001381 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382}
1383
1384/*
Jie Liueb866bb2014-07-24 20:49:57 +10001385 * This is called from xfs_mountfs to start quotas and initialize all
1386 * necessary data structures like quotainfo. This is also responsible for
1387 * running a quotacheck as necessary. We are guaranteed that the superblock
1388 * is consistently read in at this point.
1389 *
1390 * If we fail here, the mount will continue with quota turned off. We don't
1391 * need to inidicate success or failure at all.
1392 */
1393void
1394xfs_qm_mount_quotas(
1395 struct xfs_mount *mp)
1396{
1397 int error = 0;
1398 uint sbf;
1399
1400 /*
1401 * If quotas on realtime volumes is not supported, we disable
1402 * quotas immediately.
1403 */
1404 if (mp->m_sb.sb_rextents) {
1405 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1406 mp->m_qflags = 0;
1407 goto write_changes;
1408 }
1409
1410 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1411
1412 /*
1413 * Allocate the quotainfo structure inside the mount struct, and
1414 * create quotainode(s), and change/rev superblock if necessary.
1415 */
1416 error = xfs_qm_init_quotainfo(mp);
1417 if (error) {
1418 /*
1419 * We must turn off quotas.
1420 */
1421 ASSERT(mp->m_quotainfo == NULL);
1422 mp->m_qflags = 0;
1423 goto write_changes;
1424 }
1425 /*
1426 * If any of the quotas are not consistent, do a quotacheck.
1427 */
1428 if (XFS_QM_NEED_QUOTACHECK(mp)) {
1429 error = xfs_qm_quotacheck(mp);
1430 if (error) {
1431 /* Quotacheck failed and disabled quotas. */
1432 return;
1433 }
1434 }
1435 /*
1436 * If one type of quotas is off, then it will lose its
1437 * quotachecked status, since we won't be doing accounting for
1438 * that type anymore.
1439 */
1440 if (!XFS_IS_UQUOTA_ON(mp))
1441 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
1442 if (!XFS_IS_GQUOTA_ON(mp))
1443 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
1444 if (!XFS_IS_PQUOTA_ON(mp))
1445 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
1446
1447 write_changes:
1448 /*
1449 * We actually don't have to acquire the m_sb_lock at all.
1450 * This can only be called from mount, and that's single threaded. XXX
1451 */
1452 spin_lock(&mp->m_sb_lock);
1453 sbf = mp->m_sb.sb_qflags;
1454 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
1455 spin_unlock(&mp->m_sb_lock);
1456
1457 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
Dave Chinner61e63ec2015-01-22 09:10:31 +11001458 if (xfs_sync_sb(mp, false)) {
Jie Liueb866bb2014-07-24 20:49:57 +10001459 /*
1460 * We could only have been turning quotas off.
1461 * We aren't in very good shape actually because
1462 * the incore structures are convinced that quotas are
1463 * off, but the on disk superblock doesn't know that !
1464 */
1465 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
1466 xfs_alert(mp, "%s: Superblock update failed!",
1467 __func__);
1468 }
1469 }
1470
1471 if (error) {
1472 xfs_warn(mp, "Failed to initialize disk quotas.");
1473 return;
1474 }
1475}
1476
1477/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 * This is called after the superblock has been read in and we're ready to
1479 * iget the quota inodes.
1480 */
1481STATIC int
1482xfs_qm_init_quotainos(
1483 xfs_mount_t *mp)
1484{
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001485 struct xfs_inode *uip = NULL;
1486 struct xfs_inode *gip = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001487 struct xfs_inode *pip = NULL;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001488 int error;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001489 uint flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490
1491 ASSERT(mp->m_quotainfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
1493 /*
1494 * Get the uquota and gquota inodes
1495 */
Eric Sandeen62118702008-03-06 13:44:28 +11001496 if (xfs_sb_version_hasquota(&mp->m_sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 if (XFS_IS_UQUOTA_ON(mp) &&
1498 mp->m_sb.sb_uquotino != NULLFSINO) {
1499 ASSERT(mp->m_sb.sb_uquotino > 0);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001500 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1501 0, 0, &uip);
1502 if (error)
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001503 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001505 if (XFS_IS_GQUOTA_ON(mp) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 mp->m_sb.sb_gquotino != NULLFSINO) {
1507 ASSERT(mp->m_sb.sb_gquotino > 0);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001508 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1509 0, 0, &gip);
1510 if (error)
1511 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001513 if (XFS_IS_PQUOTA_ON(mp) &&
Chandra Seetharamand892d582013-07-19 17:36:02 -05001514 mp->m_sb.sb_pquotino != NULLFSINO) {
1515 ASSERT(mp->m_sb.sb_pquotino > 0);
1516 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001517 0, 0, &pip);
1518 if (error)
1519 goto error_rele;
1520 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 } else {
1522 flags |= XFS_QMOPT_SBVERSION;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 }
1524
1525 /*
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001526 * Create the three inodes, if they don't exist already. The changes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 * made above will get added to a transaction and logged in one of
1528 * the qino_alloc calls below. If the device is readonly,
1529 * temporarily switch to read-write to do this.
1530 */
1531 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001532 error = xfs_qm_qino_alloc(mp, &uip,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001533 flags | XFS_QMOPT_UQUOTA);
1534 if (error)
1535 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
1537 flags &= ~XFS_QMOPT_SBVERSION;
1538 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001539 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001540 error = xfs_qm_qino_alloc(mp, &gip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001541 flags | XFS_QMOPT_GQUOTA);
1542 if (error)
1543 goto error_rele;
1544
1545 flags &= ~XFS_QMOPT_SBVERSION;
1546 }
1547 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001548 error = xfs_qm_qino_alloc(mp, &pip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001549 flags | XFS_QMOPT_PQUOTA);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001550 if (error)
1551 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 }
1553
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001554 mp->m_quotainfo->qi_uquotaip = uip;
1555 mp->m_quotainfo->qi_gquotaip = gip;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001556 mp->m_quotainfo->qi_pquotaip = pip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557
Jesper Juhl014c2542006-01-15 02:37:08 +01001558 return 0;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001559
1560error_rele:
1561 if (uip)
1562 IRELE(uip);
1563 if (gip)
1564 IRELE(gip);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001565 if (pip)
1566 IRELE(pip);
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001567 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568}
1569
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001570STATIC void
1571xfs_qm_dqfree_one(
1572 struct xfs_dquot *dqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573{
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001574 struct xfs_mount *mp = dqp->q_mount;
1575 struct xfs_quotainfo *qi = mp->m_quotainfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576
Christoph Hellwig9f920f12012-03-13 08:52:35 +00001577 mutex_lock(&qi->qi_tree_lock);
Chandra Seetharaman329e0872013-06-27 17:25:05 -05001578 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
Christoph Hellwig9f920f12012-03-13 08:52:35 +00001579 be32_to_cpu(dqp->q_core.d_id));
Christoph Hellwigbf72de32011-12-06 21:58:19 +00001580
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001581 qi->qi_dquots--;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001582 mutex_unlock(&qi->qi_tree_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001584 xfs_qm_dqdestroy(dqp);
1585}
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +00001586
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587/* --------------- utility functions for vnodeops ---------------- */
1588
1589
1590/*
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +00001591 * Given an inode, a uid, gid and prid make sure that we have
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1593 * quotas by creating this file.
1594 * This also attaches dquot(s) to the given inode after locking it,
1595 * and returns the dquots corresponding to the uid and/or gid.
1596 *
1597 * in : inode (unlocked)
1598 * out : udquot, gdquot with references taken and unlocked
1599 */
1600int
1601xfs_qm_vop_dqalloc(
Christoph Hellwig7d095252009-06-08 15:33:32 +02001602 struct xfs_inode *ip,
Dwight Engen7aab1b22013-08-15 14:08:01 -04001603 xfs_dqid_t uid,
1604 xfs_dqid_t gid,
Christoph Hellwig7d095252009-06-08 15:33:32 +02001605 prid_t prid,
1606 uint flags,
1607 struct xfs_dquot **O_udqpp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001608 struct xfs_dquot **O_gdqpp,
1609 struct xfs_dquot **O_pdqpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001611 struct xfs_mount *mp = ip->i_mount;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001612 struct xfs_dquot *uq = NULL;
1613 struct xfs_dquot *gq = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001614 struct xfs_dquot *pq = NULL;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001615 int error;
1616 uint lockflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617
Christoph Hellwig7d095252009-06-08 15:33:32 +02001618 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 return 0;
1620
1621 lockflags = XFS_ILOCK_EXCL;
1622 xfs_ilock(ip, lockflags);
1623
Christoph Hellwigbd186aa2007-08-30 17:21:12 +10001624 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 gid = ip->i_d.di_gid;
1626
1627 /*
1628 * Attach the dquot(s) to this inode, doing a dquot allocation
1629 * if necessary. The dquot(s) will not be locked.
1630 */
1631 if (XFS_NOT_DQATTACHED(mp, ip)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001632 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1633 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 xfs_iunlock(ip, lockflags);
Jesper Juhl014c2542006-01-15 02:37:08 +01001635 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 }
1637 }
1638
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001639 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 if (ip->i_d.di_uid != uid) {
1641 /*
1642 * What we need is the dquot that has this uid, and
1643 * if we send the inode to dqget, the uid of the inode
1644 * takes priority over what's sent in the uid argument.
1645 * We must unlock inode here before calling dqget if
1646 * we're not sending the inode, because otherwise
1647 * we'll deadlock by doing trans_reserve while
1648 * holding ilock.
1649 */
1650 xfs_iunlock(ip, lockflags);
Dwight Engen7aab1b22013-08-15 14:08:01 -04001651 error = xfs_qm_dqget(mp, NULL, uid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 XFS_DQ_USER,
1653 XFS_QMOPT_DQALLOC |
1654 XFS_QMOPT_DOWARN,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001655 &uq);
1656 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +10001657 ASSERT(error != -ENOENT);
Jesper Juhl014c2542006-01-15 02:37:08 +01001658 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 }
1660 /*
1661 * Get the ilock in the right order.
1662 */
1663 xfs_dqunlock(uq);
1664 lockflags = XFS_ILOCK_SHARED;
1665 xfs_ilock(ip, lockflags);
1666 } else {
1667 /*
1668 * Take an extra reference, because we'll return
1669 * this to caller
1670 */
1671 ASSERT(ip->i_udquot);
Christoph Hellwig78e55892011-12-06 21:58:22 +00001672 uq = xfs_qm_dqhold(ip->i_udquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673 }
1674 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001675 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 if (ip->i_d.di_gid != gid) {
1677 xfs_iunlock(ip, lockflags);
Dwight Engen7aab1b22013-08-15 14:08:01 -04001678 error = xfs_qm_dqget(mp, NULL, gid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 XFS_DQ_GROUP,
1680 XFS_QMOPT_DQALLOC |
1681 XFS_QMOPT_DOWARN,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001682 &gq);
1683 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +10001684 ASSERT(error != -ENOENT);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001685 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 }
1687 xfs_dqunlock(gq);
1688 lockflags = XFS_ILOCK_SHARED;
1689 xfs_ilock(ip, lockflags);
1690 } else {
1691 ASSERT(ip->i_gdquot);
Christoph Hellwig78e55892011-12-06 21:58:22 +00001692 gq = xfs_qm_dqhold(ip->i_gdquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001694 }
1695 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001696 if (xfs_get_projid(ip) != prid) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001697 xfs_iunlock(ip, lockflags);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001698 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001699 XFS_DQ_PROJ,
1700 XFS_QMOPT_DQALLOC |
1701 XFS_QMOPT_DOWARN,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001702 &pq);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001703 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +10001704 ASSERT(error != -ENOENT);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001705 goto error_rele;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001706 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001707 xfs_dqunlock(pq);
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001708 lockflags = XFS_ILOCK_SHARED;
1709 xfs_ilock(ip, lockflags);
1710 } else {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001711 ASSERT(ip->i_pdquot);
1712 pq = xfs_qm_dqhold(ip->i_pdquot);
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001713 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 }
1715 if (uq)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001716 trace_xfs_dquot_dqalloc(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717
1718 xfs_iunlock(ip, lockflags);
1719 if (O_udqpp)
1720 *O_udqpp = uq;
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001721 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 xfs_qm_dqrele(uq);
1723 if (O_gdqpp)
1724 *O_gdqpp = gq;
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001725 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 xfs_qm_dqrele(gq);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001727 if (O_pdqpp)
1728 *O_pdqpp = pq;
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001729 else
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001730 xfs_qm_dqrele(pq);
Jesper Juhl014c2542006-01-15 02:37:08 +01001731 return 0;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001732
1733error_rele:
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001734 xfs_qm_dqrele(gq);
1735 xfs_qm_dqrele(uq);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001736 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737}
1738
1739/*
1740 * Actually transfer ownership, and do dquot modifications.
1741 * These were already reserved.
1742 */
1743xfs_dquot_t *
1744xfs_qm_vop_chown(
1745 xfs_trans_t *tp,
1746 xfs_inode_t *ip,
1747 xfs_dquot_t **IO_olddq,
1748 xfs_dquot_t *newdq)
1749{
1750 xfs_dquot_t *prevdq;
Nathan Scott06d10dd2005-06-21 15:48:47 +10001751 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1752 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1753
Christoph Hellwig7d095252009-06-08 15:33:32 +02001754
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001755 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1757
1758 /* old dquot */
1759 prevdq = *IO_olddq;
1760 ASSERT(prevdq);
1761 ASSERT(prevdq != newdq);
1762
Nathan Scott06d10dd2005-06-21 15:48:47 +10001763 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1764 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765
1766 /* the sparkling new dquot */
Nathan Scott06d10dd2005-06-21 15:48:47 +10001767 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1768 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
1770 /*
Christoph Hellwig78e55892011-12-06 21:58:22 +00001771 * Take an extra reference, because the inode is going to keep
1772 * this dquot pointer even after the trans_commit.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 */
Christoph Hellwig78e55892011-12-06 21:58:22 +00001774 *IO_olddq = xfs_qm_dqhold(newdq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
Jesper Juhl014c2542006-01-15 02:37:08 +01001776 return prevdq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777}
1778
1779/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001780 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781 */
1782int
1783xfs_qm_vop_chown_reserve(
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001784 struct xfs_trans *tp,
1785 struct xfs_inode *ip,
1786 struct xfs_dquot *udqp,
1787 struct xfs_dquot *gdqp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001788 struct xfs_dquot *pdqp,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001789 uint flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790{
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001791 struct xfs_mount *mp = ip->i_mount;
1792 uint delblks, blkflags, prjflags = 0;
1793 struct xfs_dquot *udq_unres = NULL;
1794 struct xfs_dquot *gdq_unres = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001795 struct xfs_dquot *pdq_unres = NULL;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001796 struct xfs_dquot *udq_delblks = NULL;
1797 struct xfs_dquot *gdq_delblks = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001798 struct xfs_dquot *pdq_delblks = NULL;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001799 int error;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001800
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001802 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1804
1805 delblks = ip->i_delayed_blks;
Nathan Scott06d10dd2005-06-21 15:48:47 +10001806 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1807 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
1809 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
Dwight Engen7aab1b22013-08-15 14:08:01 -04001810 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001811 udq_delblks = udqp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 /*
1813 * If there are delayed allocation blocks, then we have to
1814 * unreserve those from the old dquot, and add them to the
1815 * new dquot.
1816 */
1817 if (delblks) {
1818 ASSERT(ip->i_udquot);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001819 udq_unres = ip->i_udquot;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820 }
1821 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001822 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1823 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1824 gdq_delblks = gdqp;
1825 if (delblks) {
1826 ASSERT(ip->i_gdquot);
1827 gdq_unres = ip->i_gdquot;
1828 }
1829 }
Nathan Scott9a2a7de2006-03-31 13:04:49 +10001830
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001831 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1832 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1833 prjflags = XFS_QMOPT_ENOSPC;
1834 pdq_delblks = pdqp;
1835 if (delblks) {
1836 ASSERT(ip->i_pdquot);
1837 pdq_unres = ip->i_pdquot;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 }
1839 }
1840
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001841 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001842 udq_delblks, gdq_delblks, pdq_delblks,
1843 ip->i_d.di_nblocks, 1,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001844 flags | blkflags | prjflags);
1845 if (error)
1846 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847
1848 /*
1849 * Do the delayed blks reservations/unreservations now. Since, these
1850 * are done without the help of a transaction, if a reservation fails
1851 * its previous reservations won't be automatically undone by trans
1852 * code. So, we have to do it manually here.
1853 */
1854 if (delblks) {
1855 /*
1856 * Do the reservations first. Unreservation can't fail.
1857 */
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001858 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1859 ASSERT(udq_unres || gdq_unres || pdq_unres);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001860 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001861 udq_delblks, gdq_delblks, pdq_delblks,
1862 (xfs_qcnt_t)delblks, 0,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001863 flags | blkflags | prjflags);
1864 if (error)
1865 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001867 udq_unres, gdq_unres, pdq_unres,
1868 -((xfs_qcnt_t)delblks), 0, blkflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 }
1870
Eric Sandeend99831f2014-06-22 15:03:54 +10001871 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872}
1873
1874int
1875xfs_qm_vop_rename_dqattach(
Christoph Hellwig7d095252009-06-08 15:33:32 +02001876 struct xfs_inode **i_tab)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001878 struct xfs_mount *mp = i_tab[0]->i_mount;
1879 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880
Christoph Hellwig7d095252009-06-08 15:33:32 +02001881 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Jesper Juhl014c2542006-01-15 02:37:08 +01001882 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
Christoph Hellwig7d095252009-06-08 15:33:32 +02001884 for (i = 0; (i < 4 && i_tab[i]); i++) {
1885 struct xfs_inode *ip = i_tab[i];
1886 int error;
1887
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 /*
1889 * Watch out for duplicate entries in the table.
1890 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001891 if (i == 0 || ip != i_tab[i-1]) {
1892 if (XFS_NOT_DQATTACHED(mp, ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 error = xfs_qm_dqattach(ip, 0);
1894 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +01001895 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 }
1897 }
1898 }
Jesper Juhl014c2542006-01-15 02:37:08 +01001899 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900}
1901
1902void
Christoph Hellwig7d095252009-06-08 15:33:32 +02001903xfs_qm_vop_create_dqattach(
1904 struct xfs_trans *tp,
1905 struct xfs_inode *ip,
1906 struct xfs_dquot *udqp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001907 struct xfs_dquot *gdqp,
1908 struct xfs_dquot *pdqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001910 struct xfs_mount *mp = tp->t_mountp;
1911
1912 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 return;
1914
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001915 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig7d095252009-06-08 15:33:32 +02001916 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917
Jie Liu37eb9702013-11-26 21:38:54 +08001918 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919 ASSERT(ip->i_udquot == NULL);
Christoph Hellwig1149d962005-11-02 15:01:12 +11001920 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
Christoph Hellwig78e55892011-12-06 21:58:22 +00001921
1922 ip->i_udquot = xfs_qm_dqhold(udqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1924 }
Jie Liu37eb9702013-11-26 21:38:54 +08001925 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 ASSERT(ip->i_gdquot == NULL);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001927 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
Christoph Hellwig78e55892011-12-06 21:58:22 +00001928 ip->i_gdquot = xfs_qm_dqhold(gdqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1930 }
Jie Liu37eb9702013-11-26 21:38:54 +08001931 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001932 ASSERT(ip->i_pdquot == NULL);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001933 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1934
1935 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1936 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1937 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938}
1939