Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 4ce3121 | 2005-11-02 14:59:41 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 4ce3121 | 2005-11-02 14:59:41 +1100 | [diff] [blame] | 5 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 4ce3121 | 2005-11-02 14:59:41 +1100 | [diff] [blame] | 9 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 4ce3121 | 2005-11-02 14:59:41 +1100 | [diff] [blame] | 14 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
| 19 | #include "xfs_fs.h" |
Dave Chinner | 6ca1c90 | 2013-08-12 20:49:26 +1000 | [diff] [blame] | 20 | #include "xfs_format.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 21 | #include "xfs_log_format.h" |
Dave Chinner | 70a9883 | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 22 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 23 | #include "xfs_trans_resv.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_inode.h" |
| 27 | #include "xfs_bmap.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 28 | #include "xfs_bmap_util.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 29 | #include "xfs_alloc.h" |
| 30 | #include "xfs_quota.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_error.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 32 | #include "xfs_trans.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_buf_item.h" |
| 34 | #include "xfs_trans_space.h" |
| 35 | #include "xfs_trans_priv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_qm.h" |
Christoph Hellwig | 3fe58f3 | 2013-04-03 16:11:16 +1100 | [diff] [blame] | 37 | #include "xfs_cksum.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 38 | #include "xfs_trace.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 39 | #include "xfs_log.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 40 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | /* |
Christoph Hellwig | bf72de3 | 2011-12-06 21:58:19 +0000 | [diff] [blame] | 43 | * Lock order: |
| 44 | * |
| 45 | * ip->i_lock |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 46 | * qi->qi_tree_lock |
Christoph Hellwig | b84a3a9 | 2012-03-14 11:53:34 -0500 | [diff] [blame] | 47 | * dquot->q_qlock (xfs_dqlock() and friends) |
| 48 | * dquot->q_flush (xfs_dqflock() and friends) |
| 49 | * qi->qi_lru_lock |
Christoph Hellwig | bf72de3 | 2011-12-06 21:58:19 +0000 | [diff] [blame] | 50 | * |
| 51 | * If two dquots need to be locked the order is user before group/project, |
| 52 | * otherwise by the lowest id first, see xfs_dqlock2. |
| 53 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #ifdef DEBUG |
| 56 | xfs_buftarg_t *xfs_dqerror_target; |
| 57 | int xfs_do_dqerror; |
| 58 | int xfs_dqreq_num; |
| 59 | int xfs_dqerror_mod = 33; |
| 60 | #endif |
| 61 | |
Christoph Hellwig | a05931c | 2012-03-13 08:52:37 +0000 | [diff] [blame] | 62 | struct kmem_zone *xfs_qm_dqtrxzone; |
| 63 | static struct kmem_zone *xfs_qm_dqzone; |
| 64 | |
Dave Chinner | f112a04 | 2013-09-30 09:37:03 +1000 | [diff] [blame] | 65 | static struct lock_class_key xfs_dquot_group_class; |
| 66 | static struct lock_class_key xfs_dquot_project_class; |
Christoph Hellwig | 98b8c7a | 2009-01-19 02:03:25 +0100 | [diff] [blame] | 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | * This is called to free all the memory associated with a dquot |
| 70 | */ |
| 71 | void |
| 72 | xfs_qm_dqdestroy( |
| 73 | xfs_dquot_t *dqp) |
| 74 | { |
Christoph Hellwig | f8739c3 | 2012-03-13 08:52:34 +0000 | [diff] [blame] | 75 | ASSERT(list_empty(&dqp->q_lru)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | mutex_destroy(&dqp->q_qlock); |
Christoph Hellwig | a05931c | 2012-03-13 08:52:37 +0000 | [diff] [blame] | 78 | kmem_zone_free(xfs_qm_dqzone, dqp); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 79 | |
Christoph Hellwig | 48776fd | 2012-03-13 08:52:33 +0000 | [diff] [blame] | 80 | XFS_STATS_DEC(xs_qm_dquot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | * If default limits are in force, push them into the dquot now. |
| 85 | * We overwrite the dquot limits only if they are zero and this |
| 86 | * is not the root dquot. |
| 87 | */ |
| 88 | void |
| 89 | xfs_qm_adjust_dqlimits( |
Brian Foster | 4b6eae2e | 2013-03-18 10:51:45 -0400 | [diff] [blame] | 90 | struct xfs_mount *mp, |
| 91 | struct xfs_dquot *dq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { |
Brian Foster | 4b6eae2e | 2013-03-18 10:51:45 -0400 | [diff] [blame] | 93 | struct xfs_quotainfo *q = mp->m_quotainfo; |
| 94 | struct xfs_disk_dquot *d = &dq->q_core; |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 95 | int prealloc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | ASSERT(d->d_id); |
| 98 | |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 99 | if (q->qi_bsoftlimit && !d->d_blk_softlimit) { |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 100 | d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit); |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 101 | prealloc = 1; |
| 102 | } |
| 103 | if (q->qi_bhardlimit && !d->d_blk_hardlimit) { |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 104 | d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit); |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 105 | prealloc = 1; |
| 106 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | if (q->qi_isoftlimit && !d->d_ino_softlimit) |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 108 | d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | if (q->qi_ihardlimit && !d->d_ino_hardlimit) |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 110 | d->d_ino_hardlimit = cpu_to_be64(q->qi_ihardlimit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | if (q->qi_rtbsoftlimit && !d->d_rtb_softlimit) |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 112 | d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit) |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 114 | d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit); |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 115 | |
| 116 | if (prealloc) |
| 117 | xfs_dquot_set_prealloc_limits(dq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | /* |
| 121 | * Check the limits and timers of a dquot and start or reset timers |
| 122 | * if necessary. |
| 123 | * This gets called even when quota enforcement is OFF, which makes our |
| 124 | * life a little less complicated. (We just don't reject any quota |
| 125 | * reservations in that case, when enforcement is off). |
| 126 | * We also return 0 as the values of the timers in Q_GETQUOTA calls, when |
| 127 | * enforcement's off. |
| 128 | * In contrast, warnings are a little different in that they don't |
Nathan Scott | 754002b | 2005-06-21 15:49:06 +1000 | [diff] [blame] | 129 | * 'automatically' get started when limits get exceeded. They do |
| 130 | * get reset to zero, however, when we find the count to be under |
| 131 | * the soft limit (they are only ever set non-zero via userspace). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | */ |
| 133 | void |
| 134 | xfs_qm_adjust_dqtimers( |
| 135 | xfs_mount_t *mp, |
| 136 | xfs_disk_dquot_t *d) |
| 137 | { |
| 138 | ASSERT(d->d_id); |
| 139 | |
Christoph Hellwig | ea15ab3 | 2011-07-13 13:43:50 +0200 | [diff] [blame] | 140 | #ifdef DEBUG |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 141 | if (d->d_blk_hardlimit) |
| 142 | ASSERT(be64_to_cpu(d->d_blk_softlimit) <= |
| 143 | be64_to_cpu(d->d_blk_hardlimit)); |
| 144 | if (d->d_ino_hardlimit) |
| 145 | ASSERT(be64_to_cpu(d->d_ino_softlimit) <= |
| 146 | be64_to_cpu(d->d_ino_hardlimit)); |
| 147 | if (d->d_rtb_hardlimit) |
| 148 | ASSERT(be64_to_cpu(d->d_rtb_softlimit) <= |
| 149 | be64_to_cpu(d->d_rtb_hardlimit)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | #endif |
Christoph Hellwig | ea15ab3 | 2011-07-13 13:43:50 +0200 | [diff] [blame] | 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (!d->d_btimer) { |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 153 | if ((d->d_blk_softlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 154 | (be64_to_cpu(d->d_bcount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 155 | be64_to_cpu(d->d_blk_softlimit))) || |
| 156 | (d->d_blk_hardlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 157 | (be64_to_cpu(d->d_bcount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 158 | be64_to_cpu(d->d_blk_hardlimit)))) { |
| 159 | d->d_btimer = cpu_to_be32(get_seconds() + |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 160 | mp->m_quotainfo->qi_btimelimit); |
Nathan Scott | 754002b | 2005-06-21 15:49:06 +1000 | [diff] [blame] | 161 | } else { |
| 162 | d->d_bwarns = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
| 164 | } else { |
| 165 | if ((!d->d_blk_softlimit || |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 166 | (be64_to_cpu(d->d_bcount) <= |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 167 | be64_to_cpu(d->d_blk_softlimit))) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | (!d->d_blk_hardlimit || |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 169 | (be64_to_cpu(d->d_bcount) <= |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 170 | be64_to_cpu(d->d_blk_hardlimit)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | d->d_btimer = 0; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | if (!d->d_itimer) { |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 176 | if ((d->d_ino_softlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 177 | (be64_to_cpu(d->d_icount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 178 | be64_to_cpu(d->d_ino_softlimit))) || |
| 179 | (d->d_ino_hardlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 180 | (be64_to_cpu(d->d_icount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 181 | be64_to_cpu(d->d_ino_hardlimit)))) { |
| 182 | d->d_itimer = cpu_to_be32(get_seconds() + |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 183 | mp->m_quotainfo->qi_itimelimit); |
Nathan Scott | 754002b | 2005-06-21 15:49:06 +1000 | [diff] [blame] | 184 | } else { |
| 185 | d->d_iwarns = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | } else { |
| 188 | if ((!d->d_ino_softlimit || |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 189 | (be64_to_cpu(d->d_icount) <= |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 190 | be64_to_cpu(d->d_ino_softlimit))) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | (!d->d_ino_hardlimit || |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 192 | (be64_to_cpu(d->d_icount) <= |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 193 | be64_to_cpu(d->d_ino_hardlimit)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | d->d_itimer = 0; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | if (!d->d_rtbtimer) { |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 199 | if ((d->d_rtb_softlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 200 | (be64_to_cpu(d->d_rtbcount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 201 | be64_to_cpu(d->d_rtb_softlimit))) || |
| 202 | (d->d_rtb_hardlimit && |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 203 | (be64_to_cpu(d->d_rtbcount) > |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 204 | be64_to_cpu(d->d_rtb_hardlimit)))) { |
| 205 | d->d_rtbtimer = cpu_to_be32(get_seconds() + |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 206 | mp->m_quotainfo->qi_rtbtimelimit); |
Nathan Scott | 754002b | 2005-06-21 15:49:06 +1000 | [diff] [blame] | 207 | } else { |
| 208 | d->d_rtbwarns = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | } else { |
| 211 | if ((!d->d_rtb_softlimit || |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 212 | (be64_to_cpu(d->d_rtbcount) <= |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 213 | be64_to_cpu(d->d_rtb_softlimit))) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | (!d->d_rtb_hardlimit || |
Mitsuo Hayasaka | d0a3fe6 | 2012-02-06 12:50:07 +0000 | [diff] [blame] | 215 | (be64_to_cpu(d->d_rtbcount) <= |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 216 | be64_to_cpu(d->d_rtb_hardlimit)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | d->d_rtbtimer = 0; |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | * initialize a buffer full of dquots and log the whole thing |
| 224 | */ |
| 225 | STATIC void |
| 226 | xfs_qm_init_dquot_blk( |
| 227 | xfs_trans_t *tp, |
| 228 | xfs_mount_t *mp, |
| 229 | xfs_dqid_t id, |
| 230 | uint type, |
| 231 | xfs_buf_t *bp) |
| 232 | { |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 233 | struct xfs_quotainfo *q = mp->m_quotainfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | xfs_dqblk_t *d; |
| 235 | int curid, i; |
| 236 | |
| 237 | ASSERT(tp); |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 238 | ASSERT(xfs_buf_islocked(bp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 240 | d = bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | /* |
| 243 | * ID of the first dquot in the block - id's are zero based. |
| 244 | */ |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 245 | curid = id - (id % q->qi_dqperchunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | ASSERT(curid >= 0); |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 247 | memset(d, 0, BBTOB(q->qi_dqchunklen)); |
Christoph Hellwig | 49d35a5 | 2011-12-06 21:58:23 +0000 | [diff] [blame] | 248 | for (i = 0; i < q->qi_dqperchunk; i++, d++, curid++) { |
| 249 | d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); |
| 250 | d->dd_diskdq.d_version = XFS_DQUOT_VERSION; |
| 251 | d->dd_diskdq.d_id = cpu_to_be32(curid); |
| 252 | d->dd_diskdq.d_flags = type; |
Dave Chinner | 6fcdc59 | 2013-06-03 15:28:46 +1000 | [diff] [blame] | 253 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
Christoph Hellwig | 3fe58f3 | 2013-04-03 16:11:16 +1100 | [diff] [blame] | 254 | uuid_copy(&d->dd_uuid, &mp->m_sb.sb_uuid); |
Dave Chinner | 6fcdc59 | 2013-06-03 15:28:46 +1000 | [diff] [blame] | 255 | xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk), |
| 256 | XFS_DQUOT_CRC_OFF); |
| 257 | } |
Christoph Hellwig | 49d35a5 | 2011-12-06 21:58:23 +0000 | [diff] [blame] | 258 | } |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | xfs_trans_dquot_buf(tp, bp, |
Dave Chinner | c115541 | 2010-05-07 11:05:19 +1000 | [diff] [blame] | 261 | (type & XFS_DQ_USER ? XFS_BLF_UDQUOT_BUF : |
| 262 | ((type & XFS_DQ_PROJ) ? XFS_BLF_PDQUOT_BUF : |
| 263 | XFS_BLF_GDQUOT_BUF))); |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 264 | xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
| 266 | |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 267 | /* |
| 268 | * Initialize the dynamic speculative preallocation thresholds. The lo/hi |
| 269 | * watermarks correspond to the soft and hard limits by default. If a soft limit |
| 270 | * is not specified, we use 95% of the hard limit. |
| 271 | */ |
| 272 | void |
| 273 | xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp) |
| 274 | { |
| 275 | __uint64_t space; |
| 276 | |
| 277 | dqp->q_prealloc_hi_wmark = be64_to_cpu(dqp->q_core.d_blk_hardlimit); |
| 278 | dqp->q_prealloc_lo_wmark = be64_to_cpu(dqp->q_core.d_blk_softlimit); |
| 279 | if (!dqp->q_prealloc_lo_wmark) { |
| 280 | dqp->q_prealloc_lo_wmark = dqp->q_prealloc_hi_wmark; |
| 281 | do_div(dqp->q_prealloc_lo_wmark, 100); |
| 282 | dqp->q_prealloc_lo_wmark *= 95; |
| 283 | } |
| 284 | |
| 285 | space = dqp->q_prealloc_hi_wmark; |
| 286 | |
| 287 | do_div(space, 100); |
| 288 | dqp->q_low_space[XFS_QLOWSP_1_PCNT] = space; |
| 289 | dqp->q_low_space[XFS_QLOWSP_3_PCNT] = space * 3; |
| 290 | dqp->q_low_space[XFS_QLOWSP_5_PCNT] = space * 5; |
| 291 | } |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | /* |
| 294 | * Allocate a block and fill it with dquots. |
| 295 | * This is called when the bmapi finds a hole. |
| 296 | */ |
| 297 | STATIC int |
| 298 | xfs_qm_dqalloc( |
Tim Shimmin | efa092f | 2005-09-05 08:29:01 +1000 | [diff] [blame] | 299 | xfs_trans_t **tpp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | xfs_mount_t *mp, |
| 301 | xfs_dquot_t *dqp, |
| 302 | xfs_inode_t *quotip, |
| 303 | xfs_fileoff_t offset_fsb, |
| 304 | xfs_buf_t **O_bpp) |
| 305 | { |
| 306 | xfs_fsblock_t firstblock; |
| 307 | xfs_bmap_free_t flist; |
| 308 | xfs_bmbt_irec_t map; |
| 309 | int nmaps, error, committed; |
| 310 | xfs_buf_t *bp; |
Tim Shimmin | efa092f | 2005-09-05 08:29:01 +1000 | [diff] [blame] | 311 | xfs_trans_t *tp = *tpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | ASSERT(tp != NULL); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 314 | |
| 315 | trace_xfs_dqalloc(dqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | /* |
| 318 | * Initialize the bmap freelist prior to calling bmapi code. |
| 319 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 320 | xfs_bmap_init(&flist, &firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | xfs_ilock(quotip, XFS_ILOCK_EXCL); |
| 322 | /* |
| 323 | * Return if this type of quotas is turned off while we didn't |
| 324 | * have an inode lock |
| 325 | */ |
Chandra Seetharaman | 6967b96 | 2012-01-23 17:31:25 +0000 | [diff] [blame] | 326 | if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | xfs_iunlock(quotip, XFS_ILOCK_EXCL); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 328 | return -ESRCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
| 330 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 331 | xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | nmaps = 1; |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 333 | error = xfs_bmapi_write(tp, quotip, offset_fsb, |
| 334 | XFS_DQUOT_CLUSTER_SIZE_FSB, XFS_BMAPI_METADATA, |
| 335 | &firstblock, XFS_QM_DQALLOC_SPACE_RES(mp), |
| 336 | &map, &nmaps, &flist); |
| 337 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | goto error0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB); |
| 340 | ASSERT(nmaps == 1); |
| 341 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 342 | (map.br_startblock != HOLESTARTBLOCK)); |
| 343 | |
| 344 | /* |
| 345 | * Keep track of the blkno to save a lookup later |
| 346 | */ |
| 347 | dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock); |
| 348 | |
| 349 | /* now we can just get the buffer (there's nothing to read yet) */ |
| 350 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
| 351 | dqp->q_blkno, |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 352 | mp->m_quotainfo->qi_dqchunklen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | 0); |
Dave Chinner | 36de955 | 2014-06-06 16:02:12 +1000 | [diff] [blame] | 354 | if (!bp) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 355 | error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | goto error1; |
Dave Chinner | 36de955 | 2014-06-06 16:02:12 +1000 | [diff] [blame] | 357 | } |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 358 | bp->b_ops = &xfs_dquot_buf_ops; |
Chandra Seetharaman | 2a30f36d | 2011-09-20 13:56:55 +0000 | [diff] [blame] | 359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | /* |
| 361 | * Make a chunk of dquots out of this buffer and log |
| 362 | * the entire thing. |
| 363 | */ |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 364 | xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id), |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 365 | dqp->dq_flags & XFS_DQ_ALLTYPES, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Tim Shimmin | efa092f | 2005-09-05 08:29:01 +1000 | [diff] [blame] | 367 | /* |
| 368 | * xfs_bmap_finish() may commit the current transaction and |
| 369 | * start a second transaction if the freelist is not empty. |
| 370 | * |
| 371 | * Since we still want to modify this buffer, we need to |
| 372 | * ensure that the buffer is not released on commit of |
| 373 | * the first transaction and ensure the buffer is added to the |
| 374 | * second transaction. |
| 375 | * |
| 376 | * If there is only one transaction then don't stop the buffer |
| 377 | * from being released when it commits later on. |
| 378 | */ |
| 379 | |
| 380 | xfs_trans_bhold(tp, bp); |
| 381 | |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 382 | if ((error = xfs_bmap_finish(tpp, &flist, &committed))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | goto error1; |
| 384 | } |
| 385 | |
Tim Shimmin | efa092f | 2005-09-05 08:29:01 +1000 | [diff] [blame] | 386 | if (committed) { |
| 387 | tp = *tpp; |
| 388 | xfs_trans_bjoin(tp, bp); |
| 389 | } else { |
| 390 | xfs_trans_bhold_release(tp, bp); |
| 391 | } |
| 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | *O_bpp = bp; |
| 394 | return 0; |
| 395 | |
| 396 | error1: |
| 397 | xfs_bmap_cancel(&flist); |
| 398 | error0: |
| 399 | xfs_iunlock(quotip, XFS_ILOCK_EXCL); |
| 400 | |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 401 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
Dave Chinner | 9aede1d | 2013-10-15 09:17:52 +1100 | [diff] [blame] | 403 | |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 404 | STATIC int |
| 405 | xfs_qm_dqrepair( |
| 406 | struct xfs_mount *mp, |
| 407 | struct xfs_trans *tp, |
| 408 | struct xfs_dquot *dqp, |
| 409 | xfs_dqid_t firstid, |
| 410 | struct xfs_buf **bpp) |
| 411 | { |
| 412 | int error; |
| 413 | struct xfs_disk_dquot *ddq; |
| 414 | struct xfs_dqblk *d; |
| 415 | int i; |
| 416 | |
| 417 | /* |
| 418 | * Read the buffer without verification so we get the corrupted |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 419 | * buffer returned to us. make sure we verify it on write, though. |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 420 | */ |
| 421 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno, |
| 422 | mp->m_quotainfo->qi_dqchunklen, |
| 423 | 0, bpp, NULL); |
| 424 | |
| 425 | if (error) { |
| 426 | ASSERT(*bpp == NULL); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 427 | return error; |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 428 | } |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 429 | (*bpp)->b_ops = &xfs_dquot_buf_ops; |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 430 | |
| 431 | ASSERT(xfs_buf_islocked(*bpp)); |
| 432 | d = (struct xfs_dqblk *)(*bpp)->b_addr; |
| 433 | |
| 434 | /* Do the actual repair of dquots in this buffer */ |
| 435 | for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) { |
| 436 | ddq = &d[i].dd_diskdq; |
Dave Chinner | 9aede1d | 2013-10-15 09:17:52 +1100 | [diff] [blame] | 437 | error = xfs_dqcheck(mp, ddq, firstid + i, |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 438 | dqp->dq_flags & XFS_DQ_ALLTYPES, |
| 439 | XFS_QMOPT_DQREPAIR, "xfs_qm_dqrepair"); |
| 440 | if (error) { |
| 441 | /* repair failed, we're screwed */ |
| 442 | xfs_trans_brelse(tp, *bpp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 443 | return -EIO; |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 444 | } |
| 445 | } |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | /* |
| 451 | * Maps a dquot to the buffer containing its on-disk version. |
| 452 | * This returns a ptr to the buffer containing the on-disk dquot |
| 453 | * in the bpp param, and a ptr to the on-disk dquot within that buffer |
| 454 | */ |
| 455 | STATIC int |
| 456 | xfs_qm_dqtobp( |
Tim Shimmin | efa092f | 2005-09-05 08:29:01 +1000 | [diff] [blame] | 457 | xfs_trans_t **tpp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | xfs_dquot_t *dqp, |
| 459 | xfs_disk_dquot_t **O_ddpp, |
| 460 | xfs_buf_t **O_bpp, |
| 461 | uint flags) |
| 462 | { |
Chandra Seetharaman | 113a568 | 2013-06-27 17:25:07 -0500 | [diff] [blame] | 463 | struct xfs_bmbt_irec map; |
| 464 | int nmaps = 1, error; |
| 465 | struct xfs_buf *bp; |
Chandra Seetharaman | 995961c | 2013-06-27 17:25:06 -0500 | [diff] [blame] | 466 | struct xfs_inode *quotip = xfs_dq_to_quota_inode(dqp); |
Chandra Seetharaman | 113a568 | 2013-06-27 17:25:07 -0500 | [diff] [blame] | 467 | struct xfs_mount *mp = dqp->q_mount; |
| 468 | xfs_dqid_t id = be32_to_cpu(dqp->q_core.d_id); |
| 469 | struct xfs_trans *tp = (tpp ? *tpp : NULL); |
Christoph Hellwig | f4df8ad | 2013-12-06 12:30:13 -0800 | [diff] [blame] | 470 | uint lock_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 472 | dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
Christoph Hellwig | f4df8ad | 2013-12-06 12:30:13 -0800 | [diff] [blame] | 474 | lock_mode = xfs_ilock_data_map_shared(quotip); |
Chandra Seetharaman | 6967b96 | 2012-01-23 17:31:25 +0000 | [diff] [blame] | 475 | if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | /* |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 477 | * Return if this type of quotas is turned off while we |
| 478 | * didn't have the quota inode lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | */ |
Christoph Hellwig | f4df8ad | 2013-12-06 12:30:13 -0800 | [diff] [blame] | 480 | xfs_iunlock(quotip, lock_mode); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 481 | return -ESRCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
| 484 | /* |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 485 | * Find the block map; no allocations yet |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | */ |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 487 | error = xfs_bmapi_read(quotip, dqp->q_fileoffset, |
| 488 | XFS_DQUOT_CLUSTER_SIZE_FSB, &map, &nmaps, 0); |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 489 | |
Christoph Hellwig | f4df8ad | 2013-12-06 12:30:13 -0800 | [diff] [blame] | 490 | xfs_iunlock(quotip, lock_mode); |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 491 | if (error) |
| 492 | return error; |
| 493 | |
| 494 | ASSERT(nmaps == 1); |
| 495 | ASSERT(map.br_blockcount == 1); |
| 496 | |
| 497 | /* |
| 498 | * Offset of dquot in the (fixed sized) dquot chunk. |
| 499 | */ |
| 500 | dqp->q_bufoffset = (id % mp->m_quotainfo->qi_dqperchunk) * |
| 501 | sizeof(xfs_dqblk_t); |
| 502 | |
| 503 | ASSERT(map.br_startblock != DELAYSTARTBLOCK); |
| 504 | if (map.br_startblock == HOLESTARTBLOCK) { |
| 505 | /* |
| 506 | * We don't allocate unless we're asked to |
| 507 | */ |
| 508 | if (!(flags & XFS_QMOPT_DQALLOC)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 509 | return -ENOENT; |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 510 | |
| 511 | ASSERT(tp); |
| 512 | error = xfs_qm_dqalloc(tpp, mp, dqp, quotip, |
| 513 | dqp->q_fileoffset, &bp); |
| 514 | if (error) |
| 515 | return error; |
| 516 | tp = *tpp; |
| 517 | } else { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 518 | trace_xfs_dqtobp_read(dqp); |
| 519 | |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 520 | /* |
| 521 | * store the blkno etc so that we don't have to do the |
| 522 | * mapping all the time |
| 523 | */ |
| 524 | dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock); |
| 525 | |
Christoph Hellwig | 8a7b8a8 | 2010-04-20 17:01:30 +1000 | [diff] [blame] | 526 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, |
| 527 | dqp->q_blkno, |
| 528 | mp->m_quotainfo->qi_dqchunklen, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 529 | 0, &bp, &xfs_dquot_buf_ops); |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 530 | |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 531 | if (error == -EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) { |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 532 | xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff * |
| 533 | mp->m_quotainfo->qi_dqperchunk; |
| 534 | ASSERT(bp == NULL); |
| 535 | error = xfs_qm_dqrepair(mp, tp, dqp, firstid, &bp); |
| 536 | } |
| 537 | |
| 538 | if (error) { |
| 539 | ASSERT(bp == NULL); |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 540 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } |
| 543 | |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 544 | ASSERT(xfs_buf_islocked(bp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | *O_bpp = bp; |
Dave Chinner | c631919 | 2012-11-14 17:50:13 +1100 | [diff] [blame] | 546 | *O_ddpp = bp->b_addr + dqp->q_bufoffset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 548 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | |
| 552 | /* |
| 553 | * Read in the ondisk dquot using dqtobp() then copy it to an incore version, |
| 554 | * and release the buffer immediately. |
| 555 | * |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 556 | * If XFS_QMOPT_DQALLOC is set, allocate a dquot on disk if it needed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | */ |
Christoph Hellwig | 7ae4440 | 2011-12-06 21:58:25 +0000 | [diff] [blame] | 558 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | xfs_qm_dqread( |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 560 | struct xfs_mount *mp, |
| 561 | xfs_dqid_t id, |
| 562 | uint type, |
| 563 | uint flags, |
| 564 | struct xfs_dquot **O_dqpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | { |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 566 | struct xfs_dquot *dqp; |
| 567 | struct xfs_disk_dquot *ddqp; |
| 568 | struct xfs_buf *bp; |
| 569 | struct xfs_trans *tp = NULL; |
| 570 | int error; |
| 571 | int cancelflags = 0; |
Tim Shimmin | efa092f | 2005-09-05 08:29:01 +1000 | [diff] [blame] | 572 | |
Christoph Hellwig | 92b2e5b | 2012-02-01 13:57:20 +0000 | [diff] [blame] | 573 | |
Christoph Hellwig | a05931c | 2012-03-13 08:52:37 +0000 | [diff] [blame] | 574 | dqp = kmem_zone_zalloc(xfs_qm_dqzone, KM_SLEEP); |
Christoph Hellwig | 92b2e5b | 2012-02-01 13:57:20 +0000 | [diff] [blame] | 575 | |
| 576 | dqp->dq_flags = type; |
| 577 | dqp->q_core.d_id = cpu_to_be32(id); |
| 578 | dqp->q_mount = mp; |
Christoph Hellwig | f8739c3 | 2012-03-13 08:52:34 +0000 | [diff] [blame] | 579 | INIT_LIST_HEAD(&dqp->q_lru); |
Christoph Hellwig | 92b2e5b | 2012-02-01 13:57:20 +0000 | [diff] [blame] | 580 | mutex_init(&dqp->q_qlock); |
| 581 | init_waitqueue_head(&dqp->q_pinwait); |
| 582 | |
| 583 | /* |
| 584 | * Because we want to use a counting completion, complete |
| 585 | * the flush completion once to allow a single access to |
| 586 | * the flush completion without blocking. |
| 587 | */ |
| 588 | init_completion(&dqp->q_flush); |
| 589 | complete(&dqp->q_flush); |
| 590 | |
| 591 | /* |
| 592 | * Make sure group quotas have a different lock class than user |
| 593 | * quotas. |
| 594 | */ |
Dave Chinner | f112a04 | 2013-09-30 09:37:03 +1000 | [diff] [blame] | 595 | switch (type) { |
| 596 | case XFS_DQ_USER: |
| 597 | /* uses the default lock class */ |
| 598 | break; |
| 599 | case XFS_DQ_GROUP: |
| 600 | lockdep_set_class(&dqp->q_qlock, &xfs_dquot_group_class); |
| 601 | break; |
| 602 | case XFS_DQ_PROJ: |
| 603 | lockdep_set_class(&dqp->q_qlock, &xfs_dquot_project_class); |
| 604 | break; |
| 605 | default: |
| 606 | ASSERT(0); |
| 607 | break; |
| 608 | } |
Christoph Hellwig | 92b2e5b | 2012-02-01 13:57:20 +0000 | [diff] [blame] | 609 | |
Christoph Hellwig | 48776fd | 2012-03-13 08:52:33 +0000 | [diff] [blame] | 610 | XFS_STATS_INC(xs_qm_dquot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 612 | trace_xfs_dqread(dqp); |
| 613 | |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 614 | if (flags & XFS_QMOPT_DQALLOC) { |
| 615 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC); |
Brian Foster | 410b11a | 2014-02-07 14:55:54 +1100 | [diff] [blame] | 616 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_dqalloc, |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 617 | XFS_QM_DQALLOC_SPACE_RES(mp), 0); |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 618 | if (error) |
| 619 | goto error1; |
| 620 | cancelflags = XFS_TRANS_RELEASE_LOG_RES; |
| 621 | } |
| 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | /* |
| 624 | * get a pointer to the on-disk dquot and the buffer containing it |
| 625 | * dqp already knows its own type (GROUP/USER). |
| 626 | */ |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 627 | error = xfs_qm_dqtobp(&tp, dqp, &ddqp, &bp, flags); |
| 628 | if (error) { |
| 629 | /* |
| 630 | * This can happen if quotas got turned off (ESRCH), |
| 631 | * or if the dquot didn't exist on disk and we ask to |
| 632 | * allocate (ENOENT). |
| 633 | */ |
| 634 | trace_xfs_dqread_fail(dqp); |
| 635 | cancelflags |= XFS_TRANS_ABORT; |
| 636 | goto error1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | /* copy everything from disk dquot to the incore dquot */ |
| 640 | memcpy(&dqp->q_core, ddqp, sizeof(xfs_disk_dquot_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | xfs_qm_dquot_logitem_init(dqp); |
| 642 | |
| 643 | /* |
| 644 | * Reservation counters are defined as reservation plus current usage |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 645 | * to avoid having to add every time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | */ |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 647 | dqp->q_res_bcount = be64_to_cpu(ddqp->d_bcount); |
| 648 | dqp->q_res_icount = be64_to_cpu(ddqp->d_icount); |
| 649 | dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
Brian Foster | b136645 | 2013-03-18 10:51:46 -0400 | [diff] [blame] | 651 | /* initialize the dquot speculative prealloc thresholds */ |
| 652 | xfs_dquot_set_prealloc_limits(dqp); |
| 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | /* Mark the buf so that this will stay incore a little longer */ |
Christoph Hellwig | 38f2323 | 2011-10-10 16:52:45 +0000 | [diff] [blame] | 655 | xfs_buf_set_ref(bp, XFS_DQUOT_REF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
| 657 | /* |
| 658 | * We got the buffer with a xfs_trans_read_buf() (in dqtobp()) |
| 659 | * So we need to release with xfs_trans_brelse(). |
| 660 | * The strategy here is identical to that of inodes; we lock |
| 661 | * the dquot in xfs_qm_dqget() before making it accessible to |
| 662 | * others. This is because dquots, like inodes, need a good level of |
| 663 | * concurrency, and we don't want to take locks on the entire buffers |
| 664 | * for dquot accesses. |
| 665 | * Note also that the dquot buffer may even be dirty at this point, if |
| 666 | * this particular dquot was repaired. We still aren't afraid to |
| 667 | * brelse it because we have the changes incore. |
| 668 | */ |
Christoph Hellwig | 0c842ad | 2011-07-08 14:36:19 +0200 | [diff] [blame] | 669 | ASSERT(xfs_buf_islocked(bp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | xfs_trans_brelse(tp, bp); |
| 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | if (tp) { |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 673 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
| 674 | if (error) |
| 675 | goto error0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | *O_dqpp = dqp; |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 679 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 681 | error1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | if (tp) |
| 683 | xfs_trans_cancel(tp, cancelflags); |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 684 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | xfs_qm_dqdestroy(dqp); |
| 686 | *O_dqpp = NULL; |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 687 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | * Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a |
| 692 | * a locked dquot, doing an allocation (if requested) as needed. |
| 693 | * When both an inode and an id are given, the inode's id takes precedence. |
| 694 | * That is, if the id changes while we don't hold the ilock inside this |
| 695 | * function, the new dquot is returned, not necessarily the one requested |
| 696 | * in the id argument. |
| 697 | */ |
| 698 | int |
| 699 | xfs_qm_dqget( |
| 700 | xfs_mount_t *mp, |
| 701 | xfs_inode_t *ip, /* locked inode (optional) */ |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 702 | xfs_dqid_t id, /* uid/projid/gid depending on type */ |
| 703 | uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */ |
| 705 | xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */ |
| 706 | { |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 707 | struct xfs_quotainfo *qi = mp->m_quotainfo; |
Chandra Seetharaman | 329e087 | 2013-06-27 17:25:05 -0500 | [diff] [blame] | 708 | struct radix_tree_root *tree = xfs_dquot_tree(qi, type); |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 709 | struct xfs_dquot *dqp; |
| 710 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
| 713 | if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) || |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 714 | (! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | (! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 716 | return -ESRCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
| 719 | #ifdef DEBUG |
| 720 | if (xfs_do_dqerror) { |
| 721 | if ((xfs_dqerror_target == mp->m_ddev_targp) && |
| 722 | (xfs_dqreq_num++ % xfs_dqerror_mod) == 0) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 723 | xfs_debug(mp, "Returning error in dqget"); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 724 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
| 726 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
Nathan Scott | c8ad20f | 2005-06-21 15:38:48 +1000 | [diff] [blame] | 728 | ASSERT(type == XFS_DQ_USER || |
| 729 | type == XFS_DQ_PROJ || |
| 730 | type == XFS_DQ_GROUP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | if (ip) { |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 732 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Chandra Seetharaman | 3673141 | 2012-01-23 17:31:30 +0000 | [diff] [blame] | 733 | ASSERT(xfs_inode_dquot(ip, type) == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | } |
| 735 | #endif |
Christoph Hellwig | 9267855 | 2011-12-06 21:58:18 +0000 | [diff] [blame] | 736 | |
| 737 | restart: |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 738 | mutex_lock(&qi->qi_tree_lock); |
| 739 | dqp = radix_tree_lookup(tree, id); |
| 740 | if (dqp) { |
| 741 | xfs_dqlock(dqp); |
| 742 | if (dqp->dq_flags & XFS_DQ_FREEING) { |
| 743 | xfs_dqunlock(dqp); |
| 744 | mutex_unlock(&qi->qi_tree_lock); |
| 745 | trace_xfs_dqget_freeing(dqp); |
| 746 | delay(1); |
| 747 | goto restart; |
| 748 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 750 | dqp->q_nrefs++; |
| 751 | mutex_unlock(&qi->qi_tree_lock); |
| 752 | |
| 753 | trace_xfs_dqget_hit(dqp); |
Christoph Hellwig | 48776fd | 2012-03-13 08:52:33 +0000 | [diff] [blame] | 754 | XFS_STATS_INC(xs_qm_dqcachehits); |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 755 | *O_dqpp = dqp; |
| 756 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 758 | mutex_unlock(&qi->qi_tree_lock); |
| 759 | XFS_STATS_INC(xs_qm_dqcachemisses); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | |
| 761 | /* |
| 762 | * Dquot cache miss. We don't want to keep the inode lock across |
| 763 | * a (potential) disk read. Also we don't want to deal with the lock |
| 764 | * ordering between quotainode and this inode. OTOH, dropping the inode |
| 765 | * lock here means dealing with a chown that can happen before |
| 766 | * we re-acquire the lock. |
| 767 | */ |
| 768 | if (ip) |
| 769 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Christoph Hellwig | 97e7ade | 2011-12-06 21:58:24 +0000 | [diff] [blame] | 771 | error = xfs_qm_dqread(mp, id, type, flags, &dqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
Christoph Hellwig | 7ae4440 | 2011-12-06 21:58:25 +0000 | [diff] [blame] | 773 | if (ip) |
| 774 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 775 | |
| 776 | if (error) |
| 777 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | if (ip) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | /* |
| 781 | * A dquot could be attached to this inode by now, since |
| 782 | * we had dropped the ilock. |
| 783 | */ |
Chandra Seetharaman | 3673141 | 2012-01-23 17:31:30 +0000 | [diff] [blame] | 784 | if (xfs_this_quota_on(mp, type)) { |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 785 | struct xfs_dquot *dqp1; |
| 786 | |
Chandra Seetharaman | 3673141 | 2012-01-23 17:31:30 +0000 | [diff] [blame] | 787 | dqp1 = xfs_inode_dquot(ip, type); |
| 788 | if (dqp1) { |
Christoph Hellwig | 191f848 | 2010-04-20 17:01:53 +1000 | [diff] [blame] | 789 | xfs_qm_dqdestroy(dqp); |
Chandra Seetharaman | 3673141 | 2012-01-23 17:31:30 +0000 | [diff] [blame] | 790 | dqp = dqp1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | xfs_dqlock(dqp); |
| 792 | goto dqret; |
| 793 | } |
| 794 | } else { |
Chandra Seetharaman | 3673141 | 2012-01-23 17:31:30 +0000 | [diff] [blame] | 795 | /* inode stays locked on return */ |
| 796 | xfs_qm_dqdestroy(dqp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 797 | return -ESRCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | } |
| 800 | |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 801 | mutex_lock(&qi->qi_tree_lock); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 802 | error = radix_tree_insert(tree, id, dqp); |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 803 | if (unlikely(error)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 804 | WARN_ON(error != -EEXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 806 | /* |
| 807 | * Duplicate found. Just throw away the new dquot and start |
| 808 | * over. |
| 809 | */ |
| 810 | mutex_unlock(&qi->qi_tree_lock); |
| 811 | trace_xfs_dqget_dup(dqp); |
| 812 | xfs_qm_dqdestroy(dqp); |
| 813 | XFS_STATS_INC(xs_qm_dquot_dups); |
| 814 | goto restart; |
| 815 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
| 817 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | * We return a locked dquot to the caller, with a reference taken |
| 819 | */ |
| 820 | xfs_dqlock(dqp); |
| 821 | dqp->q_nrefs = 1; |
| 822 | |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 823 | qi->qi_dquots++; |
Christoph Hellwig | 9f920f1 | 2012-03-13 08:52:35 +0000 | [diff] [blame] | 824 | mutex_unlock(&qi->qi_tree_lock); |
| 825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | dqret: |
Christoph Hellwig | 579aa9c | 2008-04-22 17:34:00 +1000 | [diff] [blame] | 827 | ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 828 | trace_xfs_dqget_miss(dqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | *O_dqpp = dqp; |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 830 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | |
Christoph Hellwig | f8739c3 | 2012-03-13 08:52:34 +0000 | [diff] [blame] | 833 | /* |
| 834 | * Release a reference to the dquot (decrement ref-count) and unlock it. |
| 835 | * |
| 836 | * If there is a group quota attached to this dquot, carefully release that |
| 837 | * too without tripping over deadlocks'n'stuff. |
| 838 | */ |
| 839 | void |
| 840 | xfs_qm_dqput( |
| 841 | struct xfs_dquot *dqp) |
| 842 | { |
| 843 | ASSERT(dqp->q_nrefs > 0); |
| 844 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
| 845 | |
| 846 | trace_xfs_dqput(dqp); |
| 847 | |
Dave Chinner | 3c3533757 | 2014-05-05 17:30:15 +1000 | [diff] [blame] | 848 | if (--dqp->q_nrefs == 0) { |
| 849 | struct xfs_quotainfo *qi = dqp->q_mount->m_quotainfo; |
| 850 | trace_xfs_dqput_free(dqp); |
| 851 | |
| 852 | if (list_lru_add(&qi->qi_lru, &dqp->q_lru)) |
| 853 | XFS_STATS_INC(xs_qm_dquot_unused); |
| 854 | } |
| 855 | xfs_dqunlock(dqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | |
| 858 | /* |
| 859 | * Release a dquot. Flush it if dirty, then dqput() it. |
| 860 | * dquot must not be locked. |
| 861 | */ |
| 862 | void |
| 863 | xfs_qm_dqrele( |
| 864 | xfs_dquot_t *dqp) |
| 865 | { |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 866 | if (!dqp) |
| 867 | return; |
| 868 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 869 | trace_xfs_dqrele(dqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
| 871 | xfs_dqlock(dqp); |
| 872 | /* |
| 873 | * We don't care to flush it if the dquot is dirty here. |
| 874 | * That will create stutters that we want to avoid. |
| 875 | * Instead we do a delayed write when we try to reclaim |
| 876 | * a dirty dquot. Also xfs_sync will take part of the burden... |
| 877 | */ |
| 878 | xfs_qm_dqput(dqp); |
| 879 | } |
| 880 | |
Christoph Hellwig | ca30b2a | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 881 | /* |
| 882 | * This is the dquot flushing I/O completion routine. It is called |
| 883 | * from interrupt level when the buffer containing the dquot is |
| 884 | * flushed to disk. It is responsible for removing the dquot logitem |
| 885 | * from the AIL if it has not been re-logged, and unlocking the dquot's |
| 886 | * flush lock. This behavior is very similar to that of inodes.. |
| 887 | */ |
| 888 | STATIC void |
| 889 | xfs_qm_dqflush_done( |
| 890 | struct xfs_buf *bp, |
| 891 | struct xfs_log_item *lip) |
| 892 | { |
| 893 | xfs_dq_logitem_t *qip = (struct xfs_dq_logitem *)lip; |
| 894 | xfs_dquot_t *dqp = qip->qli_dquot; |
| 895 | struct xfs_ail *ailp = lip->li_ailp; |
| 896 | |
| 897 | /* |
| 898 | * We only want to pull the item from the AIL if its |
| 899 | * location in the log has not changed since we started the flush. |
| 900 | * Thus, we only bother if the dquot's lsn has |
| 901 | * not changed. First we check the lsn outside the lock |
| 902 | * since it's cheaper, and then we recheck while |
| 903 | * holding the lock before removing the dquot from the AIL. |
| 904 | */ |
| 905 | if ((lip->li_flags & XFS_LI_IN_AIL) && |
| 906 | lip->li_lsn == qip->qli_flush_lsn) { |
| 907 | |
| 908 | /* xfs_trans_ail_delete() drops the AIL lock. */ |
| 909 | spin_lock(&ailp->xa_lock); |
| 910 | if (lip->li_lsn == qip->qli_flush_lsn) |
Dave Chinner | 04913fd | 2012-04-23 15:58:41 +1000 | [diff] [blame] | 911 | xfs_trans_ail_delete(ailp, lip, SHUTDOWN_CORRUPT_INCORE); |
Christoph Hellwig | ca30b2a | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 912 | else |
| 913 | spin_unlock(&ailp->xa_lock); |
| 914 | } |
| 915 | |
| 916 | /* |
| 917 | * Release the dq's flush lock since we're done with it. |
| 918 | */ |
| 919 | xfs_dqfunlock(dqp); |
| 920 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | /* |
| 923 | * Write a modified dquot to disk. |
| 924 | * The dquot must be locked and the flush lock too taken by caller. |
| 925 | * The flush lock will not be unlocked until the dquot reaches the disk, |
| 926 | * but the dquot is free to be unlocked and modified by the caller |
| 927 | * in the interim. Dquot is still locked on return. This behavior is |
| 928 | * identical to that of inodes. |
| 929 | */ |
| 930 | int |
| 931 | xfs_qm_dqflush( |
Christoph Hellwig | fe7257f | 2012-04-23 15:58:37 +1000 | [diff] [blame] | 932 | struct xfs_dquot *dqp, |
| 933 | struct xfs_buf **bpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | { |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 935 | struct xfs_mount *mp = dqp->q_mount; |
| 936 | struct xfs_buf *bp; |
| 937 | struct xfs_disk_dquot *ddqp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
| 940 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
David Chinner | e1f49cf | 2008-08-13 16:41:43 +1000 | [diff] [blame] | 941 | ASSERT(!completion_done(&dqp->q_flush)); |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 942 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 943 | trace_xfs_dqflush(dqp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
Christoph Hellwig | fe7257f | 2012-04-23 15:58:37 +1000 | [diff] [blame] | 945 | *bpp = NULL; |
| 946 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | xfs_qm_dqunpin_wait(dqp); |
| 948 | |
| 949 | /* |
| 950 | * This may have been unpinned because the filesystem is shutting |
| 951 | * down forcibly. If that's the case we must not write this dquot |
Christoph Hellwig | dea9609 | 2012-04-23 15:58:31 +1000 | [diff] [blame] | 952 | * to disk, because the log record didn't make it to disk. |
| 953 | * |
| 954 | * We also have to remove the log item from the AIL in this case, |
| 955 | * as we wait for an emptry AIL as part of the unmount process. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | */ |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 957 | if (XFS_FORCED_SHUTDOWN(mp)) { |
Christoph Hellwig | dea9609 | 2012-04-23 15:58:31 +1000 | [diff] [blame] | 958 | struct xfs_log_item *lip = &dqp->q_logitem.qli_item; |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 959 | dqp->dq_flags &= ~XFS_DQ_DIRTY; |
Christoph Hellwig | dea9609 | 2012-04-23 15:58:31 +1000 | [diff] [blame] | 960 | |
| 961 | spin_lock(&mp->m_ail->xa_lock); |
| 962 | if (lip->li_flags & XFS_LI_IN_AIL) |
Dave Chinner | 04913fd | 2012-04-23 15:58:41 +1000 | [diff] [blame] | 963 | xfs_trans_ail_delete(mp->m_ail, lip, |
| 964 | SHUTDOWN_CORRUPT_INCORE); |
Christoph Hellwig | dea9609 | 2012-04-23 15:58:31 +1000 | [diff] [blame] | 965 | else |
| 966 | spin_unlock(&mp->m_ail->xa_lock); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 967 | error = -EIO; |
Christoph Hellwig | fe7257f | 2012-04-23 15:58:37 +1000 | [diff] [blame] | 968 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | } |
| 970 | |
| 971 | /* |
| 972 | * Get the buffer containing the on-disk dquot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | */ |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 974 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno, |
Dave Chinner | 5fd364f | 2014-08-04 12:43:26 +1000 | [diff] [blame] | 975 | mp->m_quotainfo->qi_dqchunklen, 0, &bp, |
| 976 | &xfs_dquot_buf_ops); |
Christoph Hellwig | fe7257f | 2012-04-23 15:58:37 +1000 | [diff] [blame] | 977 | if (error) |
| 978 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 980 | /* |
| 981 | * Calculate the location of the dquot inside the buffer. |
| 982 | */ |
Chandra Seetharaman | 6292604 | 2011-07-22 23:40:15 +0000 | [diff] [blame] | 983 | ddqp = bp->b_addr + dqp->q_bufoffset; |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 984 | |
| 985 | /* |
| 986 | * A simple sanity check in case we got a corrupted dquot.. |
| 987 | */ |
Dave Chinner | 9aede1d | 2013-10-15 09:17:52 +1100 | [diff] [blame] | 988 | error = xfs_dqcheck(mp, &dqp->q_core, be32_to_cpu(ddqp->d_id), 0, |
Dave Chinner | a0fa2b6 | 2011-03-07 10:01:35 +1100 | [diff] [blame] | 989 | XFS_QMOPT_DOWARN, "dqflush (incore copy)"); |
| 990 | if (error) { |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 991 | xfs_buf_relse(bp); |
| 992 | xfs_dqfunlock(dqp); |
| 993 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 994 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | /* This is the only portion of data that needs to persist */ |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 998 | memcpy(ddqp, &dqp->q_core, sizeof(xfs_disk_dquot_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
| 1000 | /* |
| 1001 | * Clear the dirty field and remember the flush lsn for later use. |
| 1002 | */ |
Christoph Hellwig | acecf1b | 2010-09-06 01:44:45 +0000 | [diff] [blame] | 1003 | dqp->dq_flags &= ~XFS_DQ_DIRTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 1005 | xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn, |
| 1006 | &dqp->q_logitem.qli_item.li_lsn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
| 1008 | /* |
Christoph Hellwig | 3fe58f3 | 2013-04-03 16:11:16 +1100 | [diff] [blame] | 1009 | * copy the lsn into the on-disk dquot now while we have the in memory |
| 1010 | * dquot here. This can't be done later in the write verifier as we |
| 1011 | * can't get access to the log item at that point in time. |
Dave Chinner | 6fcdc59 | 2013-06-03 15:28:46 +1000 | [diff] [blame] | 1012 | * |
| 1013 | * We also calculate the CRC here so that the on-disk dquot in the |
| 1014 | * buffer always has a valid CRC. This ensures there is no possibility |
| 1015 | * of a dquot without an up-to-date CRC getting to disk. |
Christoph Hellwig | 3fe58f3 | 2013-04-03 16:11:16 +1100 | [diff] [blame] | 1016 | */ |
| 1017 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 1018 | struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddqp; |
| 1019 | |
| 1020 | dqb->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn); |
Dave Chinner | 6fcdc59 | 2013-06-03 15:28:46 +1000 | [diff] [blame] | 1021 | xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk), |
| 1022 | XFS_DQUOT_CRC_OFF); |
Christoph Hellwig | 3fe58f3 | 2013-04-03 16:11:16 +1100 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | * Attach an iodone routine so that we can remove this dquot from the |
| 1027 | * AIL and release the flush lock once the dquot is synced to disk. |
| 1028 | */ |
Christoph Hellwig | ca30b2a | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 1029 | xfs_buf_attach_iodone(bp, xfs_qm_dqflush_done, |
| 1030 | &dqp->q_logitem.qli_item); |
| 1031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | /* |
| 1033 | * If the buffer is pinned then push on the log so we won't |
| 1034 | * get stuck waiting in the write for too long. |
| 1035 | */ |
Chandra Seetharaman | 811e64c | 2011-07-22 23:40:27 +0000 | [diff] [blame] | 1036 | if (xfs_buf_ispinned(bp)) { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1037 | trace_xfs_dqflush_force(dqp); |
Christoph Hellwig | a14a348 | 2010-01-19 09:56:46 +0000 | [diff] [blame] | 1038 | xfs_log_force(mp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | } |
| 1040 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1041 | trace_xfs_dqflush_done(dqp); |
Christoph Hellwig | fe7257f | 2012-04-23 15:58:37 +1000 | [diff] [blame] | 1042 | *bpp = bp; |
| 1043 | return 0; |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1044 | |
Christoph Hellwig | fe7257f | 2012-04-23 15:58:37 +1000 | [diff] [blame] | 1045 | out_unlock: |
| 1046 | xfs_dqfunlock(dqp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1047 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | } |
| 1049 | |
Christoph Hellwig | 5bb87a3 | 2009-01-19 02:03:19 +0100 | [diff] [blame] | 1050 | /* |
| 1051 | * Lock two xfs_dquot structures. |
| 1052 | * |
| 1053 | * To avoid deadlocks we always lock the quota structure with |
| 1054 | * the lowerd id first. |
| 1055 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | void |
| 1057 | xfs_dqlock2( |
| 1058 | xfs_dquot_t *d1, |
| 1059 | xfs_dquot_t *d2) |
| 1060 | { |
| 1061 | if (d1 && d2) { |
| 1062 | ASSERT(d1 != d2); |
Christoph Hellwig | 1149d96 | 2005-11-02 15:01:12 +1100 | [diff] [blame] | 1063 | if (be32_to_cpu(d1->q_core.d_id) > |
| 1064 | be32_to_cpu(d2->q_core.d_id)) { |
Christoph Hellwig | 5bb87a3 | 2009-01-19 02:03:19 +0100 | [diff] [blame] | 1065 | mutex_lock(&d2->q_qlock); |
| 1066 | mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } else { |
Christoph Hellwig | 5bb87a3 | 2009-01-19 02:03:19 +0100 | [diff] [blame] | 1068 | mutex_lock(&d1->q_qlock); |
| 1069 | mutex_lock_nested(&d2->q_qlock, XFS_QLOCK_NESTED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | } |
Christoph Hellwig | 5bb87a3 | 2009-01-19 02:03:19 +0100 | [diff] [blame] | 1071 | } else if (d1) { |
| 1072 | mutex_lock(&d1->q_qlock); |
| 1073 | } else if (d2) { |
| 1074 | mutex_lock(&d2->q_qlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | } |
| 1076 | } |
| 1077 | |
Christoph Hellwig | a05931c | 2012-03-13 08:52:37 +0000 | [diff] [blame] | 1078 | int __init |
| 1079 | xfs_qm_init(void) |
| 1080 | { |
| 1081 | xfs_qm_dqzone = |
| 1082 | kmem_zone_init(sizeof(struct xfs_dquot), "xfs_dquot"); |
| 1083 | if (!xfs_qm_dqzone) |
| 1084 | goto out; |
| 1085 | |
| 1086 | xfs_qm_dqtrxzone = |
| 1087 | kmem_zone_init(sizeof(struct xfs_dquot_acct), "xfs_dqtrx"); |
| 1088 | if (!xfs_qm_dqtrxzone) |
| 1089 | goto out_free_dqzone; |
| 1090 | |
| 1091 | return 0; |
| 1092 | |
| 1093 | out_free_dqzone: |
| 1094 | kmem_zone_destroy(xfs_qm_dqzone); |
| 1095 | out: |
| 1096 | return -ENOMEM; |
| 1097 | } |
| 1098 | |
Gerard Snitselaar | 1c2ccc6 | 2012-03-16 18:36:18 +0000 | [diff] [blame] | 1099 | void |
Christoph Hellwig | a05931c | 2012-03-13 08:52:37 +0000 | [diff] [blame] | 1100 | xfs_qm_exit(void) |
| 1101 | { |
| 1102 | kmem_zone_destroy(xfs_qm_dqtrxzone); |
| 1103 | kmem_zone_destroy(xfs_qm_dqzone); |
| 1104 | } |