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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);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100187 XFS_STATS_DEC(mp, 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);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100451 XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
Dave Chinnercd56a392013-08-28 10:18:07 +1000452
453 trace_xfs_dqreclaim_want(dqp);
Vladimir Davydov3f97b162015-02-12 14:59:35 -0800454 list_lru_isolate(lru, &dqp->q_lru);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100455 XFS_STATS_DEC(dqp->q_mount, 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);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100499 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
Dave Chinnercd56a392013-08-28 10:18:07 +1000500 trace_xfs_dqreclaim_done(dqp);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100501 XFS_STATS_INC(dqp->q_mount, 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);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100506 XFS_STATS_INC(dqp->q_mount, 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);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100511 XFS_STATS_INC(dqp->q_mount, 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
Mel Gormand0164ad2015-11-06 16:28:21 -0800528 if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM))
Dave Chinnercd56a392013-08-28 10:18:07 +1000529 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
Carlos Maiolinobe607942016-02-08 11:27:55 +1100563STATIC void
564xfs_qm_set_defquota(
565 xfs_mount_t *mp,
566 uint type,
567 xfs_quotainfo_t *qinf)
568{
569 xfs_dquot_t *dqp;
570 struct xfs_def_quota *defq;
571 int error;
572
573 error = xfs_qm_dqread(mp, 0, type, XFS_QMOPT_DOWARN, &dqp);
574
575 if (!error) {
576 xfs_disk_dquot_t *ddqp = &dqp->q_core;
577
578 defq = xfs_get_defquota(dqp, qinf);
579
580 /*
581 * Timers and warnings have been already set, let's just set the
582 * default limits for this quota type
583 */
584 defq->bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
585 defq->bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
586 defq->ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
587 defq->isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
588 defq->rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
589 defq->rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
590 xfs_qm_dqdestroy(dqp);
591 }
592}
593
Christoph Hellwiga4edd1d2009-01-19 02:03:11 +0100594/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 * This initializes all the quota information that's kept in the
596 * mount structure
597 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +1000598STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599xfs_qm_init_quotainfo(
600 xfs_mount_t *mp)
601{
602 xfs_quotainfo_t *qinf;
603 int error;
604 xfs_dquot_t *dqp;
605
606 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
607
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
609
Dave Chinner24513372014-06-25 14:58:08 +1000610 error = list_lru_init(&qinf->qi_lru);
Dave Chinneree4eec42014-05-15 09:23:24 +1000611 if (error)
612 goto out_free_qinf;
Glauber Costa5ca302c2013-08-28 10:18:18 +1000613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 /*
615 * See if quotainodes are setup, and if not, allocate them,
616 * and change the superblock accordingly.
617 */
Dave Chinneree4eec42014-05-15 09:23:24 +1000618 error = xfs_qm_init_quotainos(mp);
619 if (error)
620 goto out_free_lru;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000622 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
623 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500624 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000625 mutex_init(&qinf->qi_tree_lock);
626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 /* mutex used to serialize quotaoffs */
Jes Sorensen794ee1b2006-01-09 15:59:21 -0800628 mutex_init(&qinf->qi_quotaofflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
630 /* Precalc some constants */
631 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
Eric Sandeen6ea94bb2014-04-14 19:03:34 +1000632 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
635
636 /*
637 * We try to get the limits from the superuser's limits fields.
638 * This is quite hacky, but it is standard quota practice.
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000639 *
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000640 * Since we may not have done a quotacheck by this point, just read
641 * the dquot without attaching it to any hashtables or lists.
Carlos Maiolinobe607942016-02-08 11:27:55 +1100642 *
643 * Timers and warnings are globally set by the first timer found in
644 * user/group/proj quota types, otherwise a default value is used.
645 * This should be split into different fields per quota type.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 */
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000647 error = xfs_qm_dqread(mp, 0,
648 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
649 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
650 XFS_DQ_PROJ),
651 XFS_QMOPT_DOWARN, &dqp);
Carlos Maiolinobe607942016-02-08 11:27:55 +1100652
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000653 if (!error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 xfs_disk_dquot_t *ddqp = &dqp->q_core;
655
656 /*
657 * The warnings and timers set the grace period given to
658 * a user or group before he or she can not perform any
659 * more writing. If it is zero, a default is used.
660 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100661 qinf->qi_btimelimit = ddqp->d_btimer ?
662 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
663 qinf->qi_itimelimit = ddqp->d_itimer ?
664 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
665 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
666 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
667 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
668 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
669 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
670 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
671 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
672 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 xfs_qm_dqdestroy(dqp);
674 } else {
675 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
676 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
677 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
678 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
679 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
Nathan Scott06d10dd2005-06-21 15:48:47 +1000680 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 }
682
Carlos Maiolinobe607942016-02-08 11:27:55 +1100683 if (XFS_IS_UQUOTA_RUNNING(mp))
684 xfs_qm_set_defquota(mp, XFS_DQ_USER, qinf);
685 if (XFS_IS_GQUOTA_RUNNING(mp))
686 xfs_qm_set_defquota(mp, XFS_DQ_GROUP, qinf);
687 if (XFS_IS_PQUOTA_RUNNING(mp))
688 xfs_qm_set_defquota(mp, XFS_DQ_PROJ, qinf);
689
Dave Chinnercd56a392013-08-28 10:18:07 +1000690 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
691 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000692 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
Dave Chinnercd56a392013-08-28 10:18:07 +1000693 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000694 register_shrinker(&qinf->qi_shrinker);
Jesper Juhl014c2542006-01-15 02:37:08 +0100695 return 0;
Dave Chinneree4eec42014-05-15 09:23:24 +1000696
697out_free_lru:
698 list_lru_destroy(&qinf->qi_lru);
699out_free_qinf:
700 kmem_free(qinf);
701 mp->m_quotainfo = NULL;
702 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703}
704
705
706/*
707 * Gets called when unmounting a filesystem or when all quotas get
708 * turned off.
709 * This purges the quota inodes, destroys locks and frees itself.
710 */
711void
712xfs_qm_destroy_quotainfo(
713 xfs_mount_t *mp)
714{
715 xfs_quotainfo_t *qi;
716
717 qi = mp->m_quotainfo;
718 ASSERT(qi != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000720 unregister_shrinker(&qi->qi_shrinker);
Glauber Costaf5e1dd32013-08-28 10:18:18 +1000721 list_lru_destroy(&qi->qi_lru);
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000722
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 if (qi->qi_uquotaip) {
Christoph Hellwig26cc0022008-07-18 17:12:43 +1000724 IRELE(qi->qi_uquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 qi->qi_uquotaip = NULL; /* paranoia */
726 }
727 if (qi->qi_gquotaip) {
Christoph Hellwig26cc0022008-07-18 17:12:43 +1000728 IRELE(qi->qi_gquotaip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 qi->qi_gquotaip = NULL;
730 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500731 if (qi->qi_pquotaip) {
732 IRELE(qi->qi_pquotaip);
733 qi->qi_pquotaip = NULL;
734 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 mutex_destroy(&qi->qi_quotaofflock);
Denys Vlasenkof0e2d932008-05-19 16:31:57 +1000736 kmem_free(qi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 mp->m_quotainfo = NULL;
738}
739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740/*
741 * Create an inode and return with a reference already taken, but unlocked
742 * This is how we create quota inodes
743 */
744STATIC int
745xfs_qm_qino_alloc(
746 xfs_mount_t *mp,
747 xfs_inode_t **ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 uint flags)
749{
750 xfs_trans_t *tp;
751 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 int committed;
Dave Chinner58c90472015-02-23 22:38:08 +1100753 bool need_alloc = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Chandra Seetharamand892d582013-07-19 17:36:02 -0500755 *ip = NULL;
756 /*
757 * With superblock that doesn't have separate pquotino, we
758 * share an inode between gquota and pquota. If the on-disk
759 * superblock has GQUOTA and the filesystem is now mounted
760 * with PQUOTA, just use sb_gquotino for sb_pquotino and
761 * vice-versa.
762 */
763 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
764 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
765 xfs_ino_t ino = NULLFSINO;
766
767 if ((flags & XFS_QMOPT_PQUOTA) &&
768 (mp->m_sb.sb_gquotino != NULLFSINO)) {
769 ino = mp->m_sb.sb_gquotino;
770 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
771 } else if ((flags & XFS_QMOPT_GQUOTA) &&
772 (mp->m_sb.sb_pquotino != NULLFSINO)) {
773 ino = mp->m_sb.sb_pquotino;
774 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
775 }
776 if (ino != NULLFSINO) {
777 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
778 if (error)
779 return error;
780 mp->m_sb.sb_gquotino = NULLFSINO;
781 mp->m_sb.sb_pquotino = NULLFSINO;
Dave Chinner58c90472015-02-23 22:38:08 +1100782 need_alloc = false;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500783 }
784 }
785
Christoph Hellwig253f4912016-04-06 09:19:55 +1000786 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_create,
787 XFS_QM_QINOCREATE_SPACE_RES(mp), 0, 0, &tp);
788 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +0100789 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Dave Chinner58c90472015-02-23 22:38:08 +1100791 if (need_alloc) {
Chandra Seetharamand892d582013-07-19 17:36:02 -0500792 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
793 &committed);
794 if (error) {
Christoph Hellwig4906e212015-06-04 13:47:56 +1000795 xfs_trans_cancel(tp);
Chandra Seetharamand892d582013-07-19 17:36:02 -0500796 return error;
797 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 }
799
800 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 * Make the changes in the superblock, and log those too.
802 * sbfields arg may contain fields other than *QUOTINO;
803 * VERSIONNUM for example.
804 */
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000805 spin_lock(&mp->m_sb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (flags & XFS_QMOPT_SBVERSION) {
Eric Sandeen62118702008-03-06 13:44:28 +1100807 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Eric Sandeen62118702008-03-06 13:44:28 +1100809 xfs_sb_version_addquota(&mp->m_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 mp->m_sb.sb_uquotino = NULLFSINO;
811 mp->m_sb.sb_gquotino = NULLFSINO;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500812 mp->m_sb.sb_pquotino = NULLFSINO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Chandra Seetharamand892d582013-07-19 17:36:02 -0500814 /* qflags will get updated fully _after_ quotacheck */
815 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 }
817 if (flags & XFS_QMOPT_UQUOTA)
818 mp->m_sb.sb_uquotino = (*ip)->i_ino;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500819 else if (flags & XFS_QMOPT_GQUOTA)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 mp->m_sb.sb_gquotino = (*ip)->i_ino;
Chandra Seetharamand892d582013-07-19 17:36:02 -0500821 else
822 mp->m_sb.sb_pquotino = (*ip)->i_ino;
Eric Sandeen3685c2a2007-10-11 17:42:32 +1000823 spin_unlock(&mp->m_sb_lock);
Dave Chinner61e63ec2015-01-22 09:10:31 +1100824 xfs_log_sb(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Christoph Hellwig70393312015-06-04 13:48:08 +1000826 error = xfs_trans_commit(tp);
Dave Chinner58c90472015-02-23 22:38:08 +1100827 if (error) {
828 ASSERT(XFS_FORCED_SHUTDOWN(mp));
Dave Chinner53487782011-03-07 10:05:35 +1100829 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 }
Dave Chinner58c90472015-02-23 22:38:08 +1100831 if (need_alloc)
832 xfs_finish_inode_setup(*ip);
833 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834}
835
836
David Chinner5b139732008-04-10 12:20:10 +1000837STATIC void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838xfs_qm_reset_dqcounts(
839 xfs_mount_t *mp,
840 xfs_buf_t *bp,
841 xfs_dqid_t id,
842 uint type)
843{
Dave Chinner6fcdc592013-06-03 15:28:46 +1000844 struct xfs_dqblk *dqb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 int j;
846
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000847 trace_xfs_reset_dqcounts(bp, _RET_IP_);
848
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 /*
850 * Reset all counters and timers. They'll be
851 * started afresh by xfs_qm_quotacheck.
852 */
853#ifdef DEBUG
854 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
855 do_div(j, sizeof(xfs_dqblk_t));
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000856 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857#endif
Dave Chinner6fcdc592013-06-03 15:28:46 +1000858 dqb = bp->b_addr;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000859 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
Dave Chinner6fcdc592013-06-03 15:28:46 +1000860 struct xfs_disk_dquot *ddq;
861
862 ddq = (struct xfs_disk_dquot *)&dqb[j];
863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 /*
865 * Do a sanity check, and if needed, repair the dqblk. Don't
866 * output any warnings because it's perfectly possible to
Dave Chinner9aede1d2013-10-15 09:17:52 +1100867 * find uninitialised dquot blks. See comment in xfs_dqcheck.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 */
Dave Chinner9aede1d2013-10-15 09:17:52 +1100869 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
870 "xfs_quotacheck");
Jan Karadfcc70a2015-02-23 22:34:17 +1100871 /*
872 * Reset type in case we are reusing group quota file for
873 * project quotas or vice versa
874 */
875 ddq->d_flags = type;
Christoph Hellwig1149d962005-11-02 15:01:12 +1100876 ddq->d_bcount = 0;
877 ddq->d_icount = 0;
878 ddq->d_rtbcount = 0;
879 ddq->d_btimer = 0;
880 ddq->d_itimer = 0;
881 ddq->d_rtbtimer = 0;
882 ddq->d_bwarns = 0;
883 ddq->d_iwarns = 0;
884 ddq->d_rtbwarns = 0;
Dave Chinner6fcdc592013-06-03 15:28:46 +1000885
886 if (xfs_sb_version_hascrc(&mp->m_sb)) {
887 xfs_update_cksum((char *)&dqb[j],
888 sizeof(struct xfs_dqblk),
889 XFS_DQUOT_CRC_OFF);
890 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892}
893
894STATIC int
895xfs_qm_dqiter_bufs(
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000896 struct xfs_mount *mp,
897 xfs_dqid_t firstid,
898 xfs_fsblock_t bno,
899 xfs_filblks_t blkcnt,
900 uint flags,
901 struct list_head *buffer_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902{
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000903 struct xfs_buf *bp;
904 int error;
905 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
907 ASSERT(blkcnt > 0);
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000908 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
909 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 error = 0;
911
912 /*
913 * Blkcnt arg can be a very big number, and might even be
914 * larger than the log itself. So, we have to break it up into
915 * manageable-sized transactions.
916 * Note that we don't start a permanent transaction here; we might
917 * not be able to get a log reservation for the whole thing up front,
918 * and we don't really care to either, because we just discard
919 * everything if we were to crash in the middle of this loop.
920 */
921 while (blkcnt--) {
922 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
923 XFS_FSB_TO_DADDR(mp, bno),
Dave Chinnerc6319192012-11-14 17:50:13 +1100924 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
Dave Chinner1813dd62012-11-14 17:54:40 +1100925 &xfs_dquot_buf_ops);
Dave Chinner6fcdc592013-06-03 15:28:46 +1000926
927 /*
928 * CRC and validation errors will return a EFSCORRUPTED here. If
929 * this occurs, re-read without CRC validation so that we can
930 * repair the damage via xfs_qm_reset_dqcounts(). This process
931 * will leave a trace in the log indicating corruption has
932 * been detected.
933 */
Dave Chinner24513372014-06-25 14:58:08 +1000934 if (error == -EFSCORRUPTED) {
Dave Chinner6fcdc592013-06-03 15:28:46 +1000935 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
936 XFS_FSB_TO_DADDR(mp, bno),
937 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
938 NULL);
939 }
940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 if (error)
942 break;
943
Dave Chinner5fd364f2014-08-04 12:43:26 +1000944 /*
945 * A corrupt buffer might not have a verifier attached, so
946 * make sure we have the correct one attached before writeback
947 * occurs.
948 */
949 bp->b_ops = &xfs_dquot_buf_ops;
David Chinner5b139732008-04-10 12:20:10 +1000950 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000951 xfs_buf_delwri_queue(bp, buffer_list);
Christoph Hellwig61551f12011-08-23 08:28:06 +0000952 xfs_buf_relse(bp);
Dave Chinner6fcdc592013-06-03 15:28:46 +1000953
954 /* goto the next block. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 bno++;
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000956 firstid += mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 }
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000958
Jesper Juhl014c2542006-01-15 02:37:08 +0100959 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960}
961
962/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000963 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 * caller supplied function for every chunk of dquots that we find.
965 */
966STATIC int
967xfs_qm_dqiterate(
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000968 struct xfs_mount *mp,
969 struct xfs_inode *qip,
970 uint flags,
971 struct list_head *buffer_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972{
Christoph Hellwig43ff2122012-04-23 15:58:39 +1000973 struct xfs_bmbt_irec *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 int i, nmaps; /* number of map entries */
975 int error; /* return value */
976 xfs_fileoff_t lblkno;
977 xfs_filblks_t maxlblkcnt;
978 xfs_dqid_t firstid;
979 xfs_fsblock_t rablkno;
980 xfs_filblks_t rablkcnt;
981
982 error = 0;
983 /*
Nathan Scottc41564b2006-03-29 08:55:14 +1000984 * This looks racy, but we can't keep an inode lock across a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 * trans_reserve. But, this gets called during quotacheck, and that
986 * happens only at mount time which is single threaded.
987 */
988 if (qip->i_d.di_nblocks == 0)
Jesper Juhl014c2542006-01-15 02:37:08 +0100989 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
991 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
992
993 lblkno = 0;
Dave Chinner32972382012-06-08 15:44:54 +1000994 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 do {
Christoph Hellwigda51d322013-12-06 12:30:14 -0800996 uint lock_mode;
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 nmaps = XFS_DQITER_MAP_SIZE;
999 /*
1000 * We aren't changing the inode itself. Just changing
1001 * some of its data. No new blocks are added here, and
1002 * the inode is never added to the transaction.
1003 */
Christoph Hellwigda51d322013-12-06 12:30:14 -08001004 lock_mode = xfs_ilock_data_map_shared(qip);
Dave Chinner5c8ed202011-09-18 20:40:45 +00001005 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1006 map, &nmaps, 0);
Christoph Hellwigda51d322013-12-06 12:30:14 -08001007 xfs_iunlock(qip, lock_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 if (error)
1009 break;
1010
1011 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1012 for (i = 0; i < nmaps; i++) {
1013 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1014 ASSERT(map[i].br_blockcount);
1015
1016
1017 lblkno += map[i].br_blockcount;
1018
1019 if (map[i].br_startblock == HOLESTARTBLOCK)
1020 continue;
1021
1022 firstid = (xfs_dqid_t) map[i].br_startoff *
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001023 mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 /*
1025 * Do a read-ahead on the next extent.
1026 */
1027 if ((i+1 < nmaps) &&
1028 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1029 rablkcnt = map[i+1].br_blockcount;
1030 rablkno = map[i+1].br_startblock;
1031 while (rablkcnt--) {
Christoph Hellwig1a1a3e92010-10-06 18:41:18 +00001032 xfs_buf_readahead(mp->m_ddev_targp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 XFS_FSB_TO_DADDR(mp, rablkno),
Dave Chinnerc3f8fc72012-11-12 22:54:01 +11001034 mp->m_quotainfo->qi_dqchunklen,
Dave Chinner5fd364f2014-08-04 12:43:26 +10001035 &xfs_dquot_buf_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 rablkno++;
1037 }
1038 }
1039 /*
1040 * Iterate thru all the blks in the extent and
1041 * reset the counters of all the dquots inside them.
1042 */
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001043 error = xfs_qm_dqiter_bufs(mp, firstid,
1044 map[i].br_startblock,
1045 map[i].br_blockcount,
1046 flags, buffer_list);
1047 if (error)
1048 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 } while (nmaps > 0);
1051
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001052out:
Denys Vlasenkof0e2d932008-05-19 16:31:57 +10001053 kmem_free(map);
Jesper Juhl014c2542006-01-15 02:37:08 +01001054 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055}
1056
1057/*
1058 * Called by dqusage_adjust in doing a quotacheck.
Christoph Hellwig52fda112010-09-06 01:44:22 +00001059 *
1060 * Given the inode, and a dquot id this updates both the incore dqout as well
1061 * as the buffer copy. This is so that once the quotacheck is done, we can
1062 * just log all the buffers, as opposed to logging numerous updates to
1063 * individual dquots.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001065STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066xfs_qm_quotacheck_dqadjust(
Christoph Hellwig52fda112010-09-06 01:44:22 +00001067 struct xfs_inode *ip,
1068 xfs_dqid_t id,
1069 uint type,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 xfs_qcnt_t nblks,
1071 xfs_qcnt_t rtblks)
1072{
Christoph Hellwig52fda112010-09-06 01:44:22 +00001073 struct xfs_mount *mp = ip->i_mount;
1074 struct xfs_dquot *dqp;
1075 int error;
1076
1077 error = xfs_qm_dqget(mp, ip, id, type,
1078 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1079 if (error) {
1080 /*
1081 * Shouldn't be able to turn off quotas here.
1082 */
Dave Chinner24513372014-06-25 14:58:08 +10001083 ASSERT(error != -ESRCH);
1084 ASSERT(error != -ENOENT);
Christoph Hellwig52fda112010-09-06 01:44:22 +00001085 return error;
1086 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001087
1088 trace_xfs_dqadjust(dqp);
1089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 /*
1091 * Adjust the inode count and the block count to reflect this inode's
1092 * resource usage.
1093 */
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001094 be64_add_cpu(&dqp->q_core.d_icount, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 dqp->q_res_icount++;
1096 if (nblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001097 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 dqp->q_res_bcount += nblks;
1099 }
1100 if (rtblks) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -08001101 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 dqp->q_res_rtbcount += rtblks;
1103 }
1104
1105 /*
1106 * Set default limits, adjust timers (since we changed usages)
Christoph Hellwig191f8482010-04-20 17:01:53 +10001107 *
1108 * There are no timers for the default values set in the root dquot.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 */
Christoph Hellwig191f8482010-04-20 17:01:53 +10001110 if (dqp->q_core.d_id) {
Brian Foster4b6eae2e2013-03-18 10:51:45 -04001111 xfs_qm_adjust_dqlimits(mp, dqp);
Christoph Hellwig52fda112010-09-06 01:44:22 +00001112 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 }
1114
1115 dqp->dq_flags |= XFS_DQ_DIRTY;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001116 xfs_qm_dqput(dqp);
1117 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118}
1119
1120STATIC int
1121xfs_qm_get_rtblks(
1122 xfs_inode_t *ip,
1123 xfs_qcnt_t *O_rtblks)
1124{
1125 xfs_filblks_t rtblks; /* total rt blks */
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001126 xfs_extnum_t idx; /* extent record index */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 xfs_ifork_t *ifp; /* inode fork pointer */
1128 xfs_extnum_t nextents; /* number of extent entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 int error;
1130
1131 ASSERT(XFS_IS_REALTIME_INODE(ip));
1132 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1133 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1134 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
Jesper Juhl014c2542006-01-15 02:37:08 +01001135 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 }
1137 rtblks = 0;
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +11001138 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +10001139 for (idx = 0; idx < nextents; idx++)
1140 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 *O_rtblks = (xfs_qcnt_t)rtblks;
Jesper Juhl014c2542006-01-15 02:37:08 +01001142 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143}
1144
1145/*
1146 * callback routine supplied to bulkstat(). Given an inumber, find its
1147 * dquots and update them to account for resources taken by that inode.
1148 */
1149/* ARGSUSED */
1150STATIC int
1151xfs_qm_dqusage_adjust(
1152 xfs_mount_t *mp, /* mount point for filesystem */
1153 xfs_ino_t ino, /* inode number to get data for */
1154 void __user *buffer, /* not used */
1155 int ubsize, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 int *ubused, /* not used */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 int *res) /* result code value */
1158{
1159 xfs_inode_t *ip;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001160 xfs_qcnt_t nblks, rtblks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 int error;
1162
1163 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1164
1165 /*
1166 * rootino must have its resources accounted for, not so with the quota
1167 * inodes.
1168 */
Chandra Seetharaman9cad19d2013-06-27 17:25:04 -05001169 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 *res = BULKSTAT_RV_NOTHING;
Dave Chinner24513372014-06-25 14:58:08 +10001171 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 }
1173
1174 /*
1175 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1176 * interface expects the inode to be exclusively locked because that's
1177 * the case in all other instances. It's OK that we do this because
1178 * quotacheck is done only at mount time.
1179 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001180 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1181 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 *res = BULKSTAT_RV_NOTHING;
Jesper Juhl014c2542006-01-15 02:37:08 +01001183 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 }
1185
Christoph Hellwig52fda112010-09-06 01:44:22 +00001186 ASSERT(ip->i_delayed_blks == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
Christoph Hellwig52fda112010-09-06 01:44:22 +00001188 if (XFS_IS_REALTIME_INODE(ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 /*
1190 * Walk thru the extent list and count the realtime blocks.
1191 */
Christoph Hellwig52fda112010-09-06 01:44:22 +00001192 error = xfs_qm_get_rtblks(ip, &rtblks);
1193 if (error)
1194 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
Christoph Hellwig52fda112010-09-06 01:44:22 +00001197 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
1199 /*
1200 * Add the (disk blocks and inode) resources occupied by this
1201 * inode to its dquots. We do this adjustment in the incore dquot,
1202 * and also copy the changes to its buffer.
1203 * We don't care about putting these changes in a transaction
1204 * envelope because if we crash in the middle of a 'quotacheck'
1205 * we have to start from the beginning anyway.
1206 * Once we're done, we'll log all the dquot bufs.
1207 *
Nathan Scottc41564b2006-03-29 08:55:14 +10001208 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1210 */
1211 if (XFS_IS_UQUOTA_ON(mp)) {
Christoph Hellwig52fda112010-09-06 01:44:22 +00001212 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1213 XFS_DQ_USER, nblks, rtblks);
1214 if (error)
1215 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Christoph Hellwig52fda112010-09-06 01:44:22 +00001218 if (XFS_IS_GQUOTA_ON(mp)) {
1219 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1220 XFS_DQ_GROUP, nblks, rtblks);
1221 if (error)
1222 goto error0;
1223 }
1224
1225 if (XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001226 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
Christoph Hellwig52fda112010-09-06 01:44:22 +00001227 XFS_DQ_PROJ, nblks, rtblks);
1228 if (error)
1229 goto error0;
1230 }
1231
1232 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1233 IRELE(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 *res = BULKSTAT_RV_DIDONE;
Jesper Juhl014c2542006-01-15 02:37:08 +01001235 return 0;
Christoph Hellwig52fda112010-09-06 01:44:22 +00001236
1237error0:
1238 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1239 IRELE(ip);
1240 *res = BULKSTAT_RV_GIVEUP;
1241 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001244STATIC int
1245xfs_qm_flush_one(
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001246 struct xfs_dquot *dqp,
1247 void *data)
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001248{
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001249 struct list_head *buffer_list = data;
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001250 struct xfs_buf *bp = NULL;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001251 int error = 0;
1252
1253 xfs_dqlock(dqp);
1254 if (dqp->dq_flags & XFS_DQ_FREEING)
1255 goto out_unlock;
1256 if (!XFS_DQ_IS_DIRTY(dqp))
1257 goto out_unlock;
1258
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001259 xfs_dqflock(dqp);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001260 error = xfs_qm_dqflush(dqp, &bp);
1261 if (error)
1262 goto out_unlock;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001263
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001264 xfs_buf_delwri_queue(bp, buffer_list);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001265 xfs_buf_relse(bp);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001266out_unlock:
1267 xfs_dqunlock(dqp);
1268 return error;
1269}
1270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271/*
1272 * Walk thru all the filesystem inodes and construct a consistent view
1273 * of the disk quota world. If the quotacheck fails, disable quotas.
1274 */
Jie Liueb866bb2014-07-24 20:49:57 +10001275STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276xfs_qm_quotacheck(
1277 xfs_mount_t *mp)
1278{
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001279 int done, count, error, error2;
1280 xfs_ino_t lastino;
1281 size_t structsz;
1282 uint flags;
1283 LIST_HEAD (buffer_list);
1284 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1285 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001286 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
1288 count = INT_MAX;
1289 structsz = 1;
1290 lastino = 0;
1291 flags = 0;
1292
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001293 ASSERT(uip || gip || pip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1295
Dave Chinner0b932cc2011-03-07 10:08:35 +11001296 xfs_notice(mp, "Quotacheck needed: Please wait.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297
1298 /*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001299 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 * their counters to zero. We need a clean slate.
1301 * We don't log our changes till later.
1302 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001303 if (uip) {
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001304 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1305 &buffer_list);
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001306 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 goto error_return;
1308 flags |= XFS_UQUOTA_CHKD;
1309 }
1310
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001311 if (gip) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001312 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001313 &buffer_list);
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001314 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 goto error_return;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001316 flags |= XFS_GQUOTA_CHKD;
1317 }
1318
1319 if (pip) {
1320 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1321 &buffer_list);
1322 if (error)
1323 goto error_return;
1324 flags |= XFS_PQUOTA_CHKD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 }
1326
1327 do {
1328 /*
1329 * Iterate thru all the inodes in the file system,
1330 * adjusting the corresponding dquot counters in core.
1331 */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001332 error = xfs_bulkstat(mp, &lastino, &count,
1333 xfs_qm_dqusage_adjust,
1334 structsz, NULL, &done);
1335 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 break;
1337
Christoph Hellwig7dce11d2010-06-23 18:11:11 +10001338 } while (!done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
1340 /*
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001341 * We've made all the changes that we need to make incore. Flush them
1342 * down to disk buffers if everything was updated successfully.
David Chinner4b8879d2008-04-10 12:20:17 +10001343 */
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001344 if (XFS_IS_UQUOTA_ON(mp)) {
1345 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1346 &buffer_list);
1347 }
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001348 if (XFS_IS_GQUOTA_ON(mp)) {
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001349 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1350 &buffer_list);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001351 if (!error)
1352 error = error2;
1353 }
1354 if (XFS_IS_PQUOTA_ON(mp)) {
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001355 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1356 &buffer_list);
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001357 if (!error)
1358 error = error2;
1359 }
David Chinner4b8879d2008-04-10 12:20:17 +10001360
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001361 error2 = xfs_buf_delwri_submit(&buffer_list);
1362 if (!error)
1363 error = error2;
1364
David Chinner4b8879d2008-04-10 12:20:17 +10001365 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 * We can get this error if we couldn't do a dquot allocation inside
1367 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1368 * dirty dquots that might be cached, we just want to get rid of them
1369 * and turn quotaoff. The dquots won't be attached to any of the inodes
1370 * at this point (because we intentionally didn't in dqget_noattach).
1371 */
1372 if (error) {
Christoph Hellwig8112e9d2010-04-20 17:02:29 +10001373 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 goto error_return;
1375 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376
1377 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 * If one type of quotas is off, then it will lose its
1379 * quotachecked status, since we won't be doing accounting for
1380 * that type anymore.
1381 */
Chandra Seetharaman4177af32012-01-23 17:31:43 +00001382 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 mp->m_qflags |= flags;
1384
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 error_return:
Christoph Hellwig43ff2122012-04-23 15:58:39 +10001386 while (!list_empty(&buffer_list)) {
1387 struct xfs_buf *bp =
1388 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1389 list_del_init(&bp->b_list);
1390 xfs_buf_relse(bp);
1391 }
1392
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 if (error) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001394 xfs_warn(mp,
1395 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1396 error);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 /*
1398 * We must turn off quotas.
1399 */
1400 ASSERT(mp->m_quotainfo != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 xfs_qm_destroy_quotainfo(mp);
David Chinner31d55772008-04-10 12:20:38 +10001402 if (xfs_mount_reset_sbqflags(mp)) {
Dave Chinner0b932cc2011-03-07 10:08:35 +11001403 xfs_warn(mp,
1404 "Quotacheck: Failed to reset quota flags.");
David Chinner31d55772008-04-10 12:20:38 +10001405 }
Dave Chinner0b932cc2011-03-07 10:08:35 +11001406 } else
1407 xfs_notice(mp, "Quotacheck: Done.");
Eric Sandeend99831f2014-06-22 15:03:54 +10001408 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409}
1410
1411/*
Jie Liueb866bb2014-07-24 20:49:57 +10001412 * This is called from xfs_mountfs to start quotas and initialize all
1413 * necessary data structures like quotainfo. This is also responsible for
1414 * running a quotacheck as necessary. We are guaranteed that the superblock
1415 * is consistently read in at this point.
1416 *
1417 * If we fail here, the mount will continue with quota turned off. We don't
1418 * need to inidicate success or failure at all.
1419 */
1420void
1421xfs_qm_mount_quotas(
1422 struct xfs_mount *mp)
1423{
1424 int error = 0;
1425 uint sbf;
1426
1427 /*
1428 * If quotas on realtime volumes is not supported, we disable
1429 * quotas immediately.
1430 */
1431 if (mp->m_sb.sb_rextents) {
1432 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1433 mp->m_qflags = 0;
1434 goto write_changes;
1435 }
1436
1437 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1438
1439 /*
1440 * Allocate the quotainfo structure inside the mount struct, and
1441 * create quotainode(s), and change/rev superblock if necessary.
1442 */
1443 error = xfs_qm_init_quotainfo(mp);
1444 if (error) {
1445 /*
1446 * We must turn off quotas.
1447 */
1448 ASSERT(mp->m_quotainfo == NULL);
1449 mp->m_qflags = 0;
1450 goto write_changes;
1451 }
1452 /*
1453 * If any of the quotas are not consistent, do a quotacheck.
1454 */
1455 if (XFS_QM_NEED_QUOTACHECK(mp)) {
1456 error = xfs_qm_quotacheck(mp);
1457 if (error) {
1458 /* Quotacheck failed and disabled quotas. */
1459 return;
1460 }
1461 }
1462 /*
1463 * If one type of quotas is off, then it will lose its
1464 * quotachecked status, since we won't be doing accounting for
1465 * that type anymore.
1466 */
1467 if (!XFS_IS_UQUOTA_ON(mp))
1468 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
1469 if (!XFS_IS_GQUOTA_ON(mp))
1470 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
1471 if (!XFS_IS_PQUOTA_ON(mp))
1472 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
1473
1474 write_changes:
1475 /*
1476 * We actually don't have to acquire the m_sb_lock at all.
1477 * This can only be called from mount, and that's single threaded. XXX
1478 */
1479 spin_lock(&mp->m_sb_lock);
1480 sbf = mp->m_sb.sb_qflags;
1481 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
1482 spin_unlock(&mp->m_sb_lock);
1483
1484 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
Dave Chinner61e63ec2015-01-22 09:10:31 +11001485 if (xfs_sync_sb(mp, false)) {
Jie Liueb866bb2014-07-24 20:49:57 +10001486 /*
1487 * We could only have been turning quotas off.
1488 * We aren't in very good shape actually because
1489 * the incore structures are convinced that quotas are
1490 * off, but the on disk superblock doesn't know that !
1491 */
1492 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
1493 xfs_alert(mp, "%s: Superblock update failed!",
1494 __func__);
1495 }
1496 }
1497
1498 if (error) {
1499 xfs_warn(mp, "Failed to initialize disk quotas.");
1500 return;
1501 }
1502}
1503
1504/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 * This is called after the superblock has been read in and we're ready to
1506 * iget the quota inodes.
1507 */
1508STATIC int
1509xfs_qm_init_quotainos(
1510 xfs_mount_t *mp)
1511{
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001512 struct xfs_inode *uip = NULL;
1513 struct xfs_inode *gip = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001514 struct xfs_inode *pip = NULL;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001515 int error;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001516 uint flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
1518 ASSERT(mp->m_quotainfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519
1520 /*
1521 * Get the uquota and gquota inodes
1522 */
Eric Sandeen62118702008-03-06 13:44:28 +11001523 if (xfs_sb_version_hasquota(&mp->m_sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 if (XFS_IS_UQUOTA_ON(mp) &&
1525 mp->m_sb.sb_uquotino != NULLFSINO) {
1526 ASSERT(mp->m_sb.sb_uquotino > 0);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001527 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1528 0, 0, &uip);
1529 if (error)
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001530 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001532 if (XFS_IS_GQUOTA_ON(mp) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 mp->m_sb.sb_gquotino != NULLFSINO) {
1534 ASSERT(mp->m_sb.sb_gquotino > 0);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001535 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1536 0, 0, &gip);
1537 if (error)
1538 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001540 if (XFS_IS_PQUOTA_ON(mp) &&
Chandra Seetharamand892d582013-07-19 17:36:02 -05001541 mp->m_sb.sb_pquotino != NULLFSINO) {
1542 ASSERT(mp->m_sb.sb_pquotino > 0);
1543 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001544 0, 0, &pip);
1545 if (error)
1546 goto error_rele;
1547 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 } else {
1549 flags |= XFS_QMOPT_SBVERSION;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 }
1551
1552 /*
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001553 * Create the three inodes, if they don't exist already. The changes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 * made above will get added to a transaction and logged in one of
1555 * the qino_alloc calls below. If the device is readonly,
1556 * temporarily switch to read-write to do this.
1557 */
1558 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001559 error = xfs_qm_qino_alloc(mp, &uip,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001560 flags | XFS_QMOPT_UQUOTA);
1561 if (error)
1562 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
1564 flags &= ~XFS_QMOPT_SBVERSION;
1565 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001566 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001567 error = xfs_qm_qino_alloc(mp, &gip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001568 flags | XFS_QMOPT_GQUOTA);
1569 if (error)
1570 goto error_rele;
1571
1572 flags &= ~XFS_QMOPT_SBVERSION;
1573 }
1574 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001575 error = xfs_qm_qino_alloc(mp, &pip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001576 flags | XFS_QMOPT_PQUOTA);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001577 if (error)
1578 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579 }
1580
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +10001581 mp->m_quotainfo->qi_uquotaip = uip;
1582 mp->m_quotainfo->qi_gquotaip = gip;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001583 mp->m_quotainfo->qi_pquotaip = pip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
Jesper Juhl014c2542006-01-15 02:37:08 +01001585 return 0;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001586
1587error_rele:
1588 if (uip)
1589 IRELE(uip);
1590 if (gip)
1591 IRELE(gip);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001592 if (pip)
1593 IRELE(pip);
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001594 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595}
1596
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001597STATIC void
1598xfs_qm_dqfree_one(
1599 struct xfs_dquot *dqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600{
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001601 struct xfs_mount *mp = dqp->q_mount;
1602 struct xfs_quotainfo *qi = mp->m_quotainfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603
Christoph Hellwig9f920f12012-03-13 08:52:35 +00001604 mutex_lock(&qi->qi_tree_lock);
Chandra Seetharaman329e0872013-06-27 17:25:05 -05001605 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
Christoph Hellwig9f920f12012-03-13 08:52:35 +00001606 be32_to_cpu(dqp->q_core.d_id));
Christoph Hellwigbf72de32011-12-06 21:58:19 +00001607
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001608 qi->qi_dquots--;
Christoph Hellwigb84a3a92012-03-14 11:53:34 -05001609 mutex_unlock(&qi->qi_tree_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +00001611 xfs_qm_dqdestroy(dqp);
1612}
Christoph Hellwigbe7ffc32011-12-06 21:58:17 +00001613
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614/* --------------- utility functions for vnodeops ---------------- */
1615
1616
1617/*
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +00001618 * Given an inode, a uid, gid and prid make sure that we have
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1620 * quotas by creating this file.
1621 * This also attaches dquot(s) to the given inode after locking it,
1622 * and returns the dquots corresponding to the uid and/or gid.
1623 *
1624 * in : inode (unlocked)
1625 * out : udquot, gdquot with references taken and unlocked
1626 */
1627int
1628xfs_qm_vop_dqalloc(
Christoph Hellwig7d095252009-06-08 15:33:32 +02001629 struct xfs_inode *ip,
Dwight Engen7aab1b22013-08-15 14:08:01 -04001630 xfs_dqid_t uid,
1631 xfs_dqid_t gid,
Christoph Hellwig7d095252009-06-08 15:33:32 +02001632 prid_t prid,
1633 uint flags,
1634 struct xfs_dquot **O_udqpp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001635 struct xfs_dquot **O_gdqpp,
1636 struct xfs_dquot **O_pdqpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001638 struct xfs_mount *mp = ip->i_mount;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001639 struct xfs_dquot *uq = NULL;
1640 struct xfs_dquot *gq = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001641 struct xfs_dquot *pq = NULL;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001642 int error;
1643 uint lockflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644
Christoph Hellwig7d095252009-06-08 15:33:32 +02001645 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 return 0;
1647
1648 lockflags = XFS_ILOCK_EXCL;
1649 xfs_ilock(ip, lockflags);
1650
Christoph Hellwigbd186aa2007-08-30 17:21:12 +10001651 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 gid = ip->i_d.di_gid;
1653
1654 /*
1655 * Attach the dquot(s) to this inode, doing a dquot allocation
1656 * if necessary. The dquot(s) will not be locked.
1657 */
1658 if (XFS_NOT_DQATTACHED(mp, ip)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001659 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1660 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 xfs_iunlock(ip, lockflags);
Jesper Juhl014c2542006-01-15 02:37:08 +01001662 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663 }
1664 }
1665
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001666 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 if (ip->i_d.di_uid != uid) {
1668 /*
1669 * What we need is the dquot that has this uid, and
1670 * if we send the inode to dqget, the uid of the inode
1671 * takes priority over what's sent in the uid argument.
1672 * We must unlock inode here before calling dqget if
1673 * we're not sending the inode, because otherwise
1674 * we'll deadlock by doing trans_reserve while
1675 * holding ilock.
1676 */
1677 xfs_iunlock(ip, lockflags);
Dwight Engen7aab1b22013-08-15 14:08:01 -04001678 error = xfs_qm_dqget(mp, NULL, uid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 XFS_DQ_USER,
1680 XFS_QMOPT_DQALLOC |
1681 XFS_QMOPT_DOWARN,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001682 &uq);
1683 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +10001684 ASSERT(error != -ENOENT);
Jesper Juhl014c2542006-01-15 02:37:08 +01001685 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 }
1687 /*
1688 * Get the ilock in the right order.
1689 */
1690 xfs_dqunlock(uq);
1691 lockflags = XFS_ILOCK_SHARED;
1692 xfs_ilock(ip, lockflags);
1693 } else {
1694 /*
1695 * Take an extra reference, because we'll return
1696 * this to caller
1697 */
1698 ASSERT(ip->i_udquot);
Christoph Hellwig78e55892011-12-06 21:58:22 +00001699 uq = xfs_qm_dqhold(ip->i_udquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 }
1701 }
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001702 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 if (ip->i_d.di_gid != gid) {
1704 xfs_iunlock(ip, lockflags);
Dwight Engen7aab1b22013-08-15 14:08:01 -04001705 error = xfs_qm_dqget(mp, NULL, gid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 XFS_DQ_GROUP,
1707 XFS_QMOPT_DQALLOC |
1708 XFS_QMOPT_DOWARN,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001709 &gq);
1710 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +10001711 ASSERT(error != -ENOENT);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001712 goto error_rele;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 }
1714 xfs_dqunlock(gq);
1715 lockflags = XFS_ILOCK_SHARED;
1716 xfs_ilock(ip, lockflags);
1717 } else {
1718 ASSERT(ip->i_gdquot);
Christoph Hellwig78e55892011-12-06 21:58:22 +00001719 gq = xfs_qm_dqhold(ip->i_gdquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001721 }
1722 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001723 if (xfs_get_projid(ip) != prid) {
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001724 xfs_iunlock(ip, lockflags);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001725 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001726 XFS_DQ_PROJ,
1727 XFS_QMOPT_DQALLOC |
1728 XFS_QMOPT_DOWARN,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001729 &pq);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001730 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +10001731 ASSERT(error != -ENOENT);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001732 goto error_rele;
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001733 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001734 xfs_dqunlock(pq);
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001735 lockflags = XFS_ILOCK_SHARED;
1736 xfs_ilock(ip, lockflags);
1737 } else {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001738 ASSERT(ip->i_pdquot);
1739 pq = xfs_qm_dqhold(ip->i_pdquot);
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001740 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 }
1742 if (uq)
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001743 trace_xfs_dquot_dqalloc(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744
1745 xfs_iunlock(ip, lockflags);
1746 if (O_udqpp)
1747 *O_udqpp = uq;
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001748 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 xfs_qm_dqrele(uq);
1750 if (O_gdqpp)
1751 *O_gdqpp = gq;
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001752 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 xfs_qm_dqrele(gq);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001754 if (O_pdqpp)
1755 *O_pdqpp = pq;
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001756 else
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001757 xfs_qm_dqrele(pq);
Jesper Juhl014c2542006-01-15 02:37:08 +01001758 return 0;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001759
1760error_rele:
Markus Elfringd2a5e3c2014-12-01 08:24:20 +11001761 xfs_qm_dqrele(gq);
1762 xfs_qm_dqrele(uq);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001763 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764}
1765
1766/*
1767 * Actually transfer ownership, and do dquot modifications.
1768 * These were already reserved.
1769 */
1770xfs_dquot_t *
1771xfs_qm_vop_chown(
1772 xfs_trans_t *tp,
1773 xfs_inode_t *ip,
1774 xfs_dquot_t **IO_olddq,
1775 xfs_dquot_t *newdq)
1776{
1777 xfs_dquot_t *prevdq;
Nathan Scott06d10dd2005-06-21 15:48:47 +10001778 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1779 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1780
Christoph Hellwig7d095252009-06-08 15:33:32 +02001781
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001782 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1784
1785 /* old dquot */
1786 prevdq = *IO_olddq;
1787 ASSERT(prevdq);
1788 ASSERT(prevdq != newdq);
1789
Nathan Scott06d10dd2005-06-21 15:48:47 +10001790 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1791 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792
1793 /* the sparkling new dquot */
Nathan Scott06d10dd2005-06-21 15:48:47 +10001794 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1795 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796
1797 /*
Christoph Hellwig78e55892011-12-06 21:58:22 +00001798 * Take an extra reference, because the inode is going to keep
1799 * this dquot pointer even after the trans_commit.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 */
Christoph Hellwig78e55892011-12-06 21:58:22 +00001801 *IO_olddq = xfs_qm_dqhold(newdq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802
Jesper Juhl014c2542006-01-15 02:37:08 +01001803 return prevdq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804}
1805
1806/*
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001807 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 */
1809int
1810xfs_qm_vop_chown_reserve(
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001811 struct xfs_trans *tp,
1812 struct xfs_inode *ip,
1813 struct xfs_dquot *udqp,
1814 struct xfs_dquot *gdqp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001815 struct xfs_dquot *pdqp,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001816 uint flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817{
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001818 struct xfs_mount *mp = ip->i_mount;
1819 uint delblks, blkflags, prjflags = 0;
1820 struct xfs_dquot *udq_unres = NULL;
1821 struct xfs_dquot *gdq_unres = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001822 struct xfs_dquot *pdq_unres = NULL;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001823 struct xfs_dquot *udq_delblks = NULL;
1824 struct xfs_dquot *gdq_delblks = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001825 struct xfs_dquot *pdq_delblks = NULL;
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001826 int error;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001827
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001829 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1831
1832 delblks = ip->i_delayed_blks;
Nathan Scott06d10dd2005-06-21 15:48:47 +10001833 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1834 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835
1836 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
Dwight Engen7aab1b22013-08-15 14:08:01 -04001837 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001838 udq_delblks = udqp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 /*
1840 * If there are delayed allocation blocks, then we have to
1841 * unreserve those from the old dquot, and add them to the
1842 * new dquot.
1843 */
1844 if (delblks) {
1845 ASSERT(ip->i_udquot);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001846 udq_unres = ip->i_udquot;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 }
1848 }
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001849 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1850 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1851 gdq_delblks = gdqp;
1852 if (delblks) {
1853 ASSERT(ip->i_gdquot);
1854 gdq_unres = ip->i_gdquot;
1855 }
1856 }
Nathan Scott9a2a7de2006-03-31 13:04:49 +10001857
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001858 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1859 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1860 prjflags = XFS_QMOPT_ENOSPC;
1861 pdq_delblks = pdqp;
1862 if (delblks) {
1863 ASSERT(ip->i_pdquot);
1864 pdq_unres = ip->i_pdquot;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 }
1866 }
1867
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001868 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001869 udq_delblks, gdq_delblks, pdq_delblks,
1870 ip->i_d.di_nblocks, 1,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001871 flags | blkflags | prjflags);
1872 if (error)
1873 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874
1875 /*
1876 * Do the delayed blks reservations/unreservations now. Since, these
1877 * are done without the help of a transaction, if a reservation fails
1878 * its previous reservations won't be automatically undone by trans
1879 * code. So, we have to do it manually here.
1880 */
1881 if (delblks) {
1882 /*
1883 * Do the reservations first. Unreservation can't fail.
1884 */
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001885 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1886 ASSERT(udq_unres || gdq_unres || pdq_unres);
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001887 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001888 udq_delblks, gdq_delblks, pdq_delblks,
1889 (xfs_qcnt_t)delblks, 0,
Chandra Seetharaman113a5682013-06-27 17:25:07 -05001890 flags | blkflags | prjflags);
1891 if (error)
1892 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001894 udq_unres, gdq_unres, pdq_unres,
1895 -((xfs_qcnt_t)delblks), 0, blkflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 }
1897
Eric Sandeend99831f2014-06-22 15:03:54 +10001898 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899}
1900
1901int
1902xfs_qm_vop_rename_dqattach(
Christoph Hellwig7d095252009-06-08 15:33:32 +02001903 struct xfs_inode **i_tab)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001905 struct xfs_mount *mp = i_tab[0]->i_mount;
1906 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907
Christoph Hellwig7d095252009-06-08 15:33:32 +02001908 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Jesper Juhl014c2542006-01-15 02:37:08 +01001909 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910
Christoph Hellwig7d095252009-06-08 15:33:32 +02001911 for (i = 0; (i < 4 && i_tab[i]); i++) {
1912 struct xfs_inode *ip = i_tab[i];
1913 int error;
1914
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915 /*
1916 * Watch out for duplicate entries in the table.
1917 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001918 if (i == 0 || ip != i_tab[i-1]) {
1919 if (XFS_NOT_DQATTACHED(mp, ip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 error = xfs_qm_dqattach(ip, 0);
1921 if (error)
Jesper Juhl014c2542006-01-15 02:37:08 +01001922 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 }
1924 }
1925 }
Jesper Juhl014c2542006-01-15 02:37:08 +01001926 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927}
1928
1929void
Christoph Hellwig7d095252009-06-08 15:33:32 +02001930xfs_qm_vop_create_dqattach(
1931 struct xfs_trans *tp,
1932 struct xfs_inode *ip,
1933 struct xfs_dquot *udqp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001934 struct xfs_dquot *gdqp,
1935 struct xfs_dquot *pdqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001937 struct xfs_mount *mp = tp->t_mountp;
1938
1939 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 return;
1941
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001942 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig7d095252009-06-08 15:33:32 +02001943 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
Jie Liu37eb9702013-11-26 21:38:54 +08001945 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 ASSERT(ip->i_udquot == NULL);
Christoph Hellwig1149d962005-11-02 15:01:12 +11001947 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
Christoph Hellwig78e55892011-12-06 21:58:22 +00001948
1949 ip->i_udquot = xfs_qm_dqhold(udqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1951 }
Jie Liu37eb9702013-11-26 21:38:54 +08001952 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 ASSERT(ip->i_gdquot == NULL);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001954 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
Christoph Hellwig78e55892011-12-06 21:58:22 +00001955 ip->i_gdquot = xfs_qm_dqhold(gdqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1957 }
Jie Liu37eb9702013-11-26 21:38:54 +08001958 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001959 ASSERT(ip->i_pdquot == NULL);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001960 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1961
1962 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1963 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1964 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965}
1966