1 /*
2 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_inode.h"
26 #include "xfs_trans.h"
27 #include "xfs_trans_priv.h"
28 #include "xfs_inode_item.h"
29 #include "xfs_trace.h"
30
31 /*
32 * Add a locked inode to the transaction.
33 *
34 * The inode must be locked, and it cannot be associated with any transaction.
35 * If lock_flags is non-zero the inode will be unlocked on transaction commit.
36 */
37 void
xfs_trans_ijoin(struct xfs_trans * tp,struct xfs_inode * ip,uint lock_flags)38 xfs_trans_ijoin(
39 struct xfs_trans *tp,
40 struct xfs_inode *ip,
41 uint lock_flags)
42 {
43 xfs_inode_log_item_t *iip;
44
45 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
46 if (ip->i_itemp == NULL)
47 xfs_inode_item_init(ip, ip->i_mount);
48 iip = ip->i_itemp;
49
50 ASSERT(iip->ili_lock_flags == 0);
51 iip->ili_lock_flags = lock_flags;
52
53 /*
54 * Get a log_item_desc to point at the new item.
55 */
56 xfs_trans_add_item(tp, &iip->ili_item);
57 }
58
59 /*
60 * Transactional inode timestamp update. Requires the inode to be locked and
61 * joined to the transaction supplied. Relies on the transaction subsystem to
62 * track dirty state and update/writeback the inode accordingly.
63 */
64 void
xfs_trans_ichgtime(struct xfs_trans * tp,struct xfs_inode * ip,int flags)65 xfs_trans_ichgtime(
66 struct xfs_trans *tp,
67 struct xfs_inode *ip,
68 int flags)
69 {
70 struct inode *inode = VFS_I(ip);
71 struct timespec tv;
72
73 ASSERT(tp);
74 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
75
76 tv = current_time(inode);
77
78 if (flags & XFS_ICHGTIME_MOD)
79 inode->i_mtime = tv;
80 if (flags & XFS_ICHGTIME_CHG)
81 inode->i_ctime = tv;
82 }
83
84 /*
85 * This is called to mark the fields indicated in fieldmask as needing
86 * to be logged when the transaction is committed. The inode must
87 * already be associated with the given transaction.
88 *
89 * The values for fieldmask are defined in xfs_inode_item.h. We always
90 * log all of the core inode if any of it has changed, and we always log
91 * all of the inline data/extents/b-tree root if any of them has changed.
92 */
93 void
xfs_trans_log_inode(xfs_trans_t * tp,xfs_inode_t * ip,uint flags)94 xfs_trans_log_inode(
95 xfs_trans_t *tp,
96 xfs_inode_t *ip,
97 uint flags)
98 {
99 ASSERT(ip->i_itemp != NULL);
100 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
101
102 /*
103 * Record the specific change for fdatasync optimisation. This
104 * allows fdatasync to skip log forces for inodes that are only
105 * timestamp dirty. We do this before the change count so that
106 * the core being logged in this case does not impact on fdatasync
107 * behaviour.
108 */
109 ip->i_itemp->ili_fsync_fields |= flags;
110
111 /*
112 * First time we log the inode in a transaction, bump the inode change
113 * counter if it is configured for this to occur. We don't use
114 * inode_inc_version() because there is no need for extra locking around
115 * i_version as we already hold the inode locked exclusively for
116 * metadata modification.
117 */
118 if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
119 IS_I_VERSION(VFS_I(ip))) {
120 VFS_I(ip)->i_version++;
121 flags |= XFS_ILOG_CORE;
122 }
123
124 tp->t_flags |= XFS_TRANS_DIRTY;
125 ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
126
127 /*
128 * Always OR in the bits from the ili_last_fields field.
129 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
130 * routines in the eventual clearing of the ili_fields bits.
131 * See the big comment in xfs_iflush() for an explanation of
132 * this coordination mechanism.
133 */
134 flags |= ip->i_itemp->ili_last_fields;
135 ip->i_itemp->ili_fields |= flags;
136 }
137
138 int
xfs_trans_roll_inode(struct xfs_trans ** tpp,struct xfs_inode * ip)139 xfs_trans_roll_inode(
140 struct xfs_trans **tpp,
141 struct xfs_inode *ip)
142 {
143 int error;
144
145 xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
146 error = xfs_trans_roll(tpp);
147 if (!error)
148 xfs_trans_ijoin(*tpp, ip, 0);
149 return error;
150 }
151