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 */
37void
38xfs_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 */
64void
65xfs_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_fs_time(inode->i_sb);
77
78	if ((flags & XFS_ICHGTIME_MOD) &&
79	    !timespec_equal(&inode->i_mtime, &tv)) {
80		inode->i_mtime = tv;
81		ip->i_d.di_mtime.t_sec = tv.tv_sec;
82		ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
83	}
84	if ((flags & XFS_ICHGTIME_CHG) &&
85	    !timespec_equal(&inode->i_ctime, &tv)) {
86		inode->i_ctime = tv;
87		ip->i_d.di_ctime.t_sec = tv.tv_sec;
88		ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
89	}
90}
91
92/*
93 * This is called to mark the fields indicated in fieldmask as needing
94 * to be logged when the transaction is committed.  The inode must
95 * already be associated with the given transaction.
96 *
97 * The values for fieldmask are defined in xfs_inode_item.h.  We always
98 * log all of the core inode if any of it has changed, and we always log
99 * all of the inline data/extents/b-tree root if any of them has changed.
100 */
101void
102xfs_trans_log_inode(
103	xfs_trans_t	*tp,
104	xfs_inode_t	*ip,
105	uint		flags)
106{
107	ASSERT(ip->i_itemp != NULL);
108	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
109
110	/*
111	 * First time we log the inode in a transaction, bump the inode change
112	 * counter if it is configured for this to occur. We don't use
113	 * inode_inc_version() because there is no need for extra locking around
114	 * i_version as we already hold the inode locked exclusively for
115	 * metadata modification.
116	 */
117	if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
118	    IS_I_VERSION(VFS_I(ip))) {
119		ip->i_d.di_changecount = ++VFS_I(ip)->i_version;
120		flags |= XFS_ILOG_CORE;
121	}
122
123	tp->t_flags |= XFS_TRANS_DIRTY;
124	ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
125
126	/*
127	 * Always OR in the bits from the ili_last_fields field.
128	 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
129	 * routines in the eventual clearing of the ili_fields bits.
130	 * See the big comment in xfs_iflush() for an explanation of
131	 * this coordination mechanism.
132	 */
133	flags |= ip->i_itemp->ili_last_fields;
134	ip->i_itemp->ili_fields |= flags;
135}
136