1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_trans.h"
15#include "xfs_trans_priv.h"
16#include "xfs_inode_item.h"
17
18#include <linux/iversion.h>
19
20/*
21 * Add a locked inode to the transaction.
22 *
23 * The inode must be locked, and it cannot be associated with any transaction.
24 * If lock_flags is non-zero the inode will be unlocked on transaction commit.
25 */
26void
27xfs_trans_ijoin(
28	struct xfs_trans	*tp,
29	struct xfs_inode	*ip,
30	uint			lock_flags)
31{
32	struct xfs_inode_log_item *iip;
33
34	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
35	if (ip->i_itemp == NULL)
36		xfs_inode_item_init(ip, ip->i_mount);
37	iip = ip->i_itemp;
38
39	ASSERT(iip->ili_lock_flags == 0);
40	iip->ili_lock_flags = lock_flags;
41	ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
42
43	/* Reset the per-tx dirty context and add the item to the tx. */
44	iip->ili_dirty_flags = 0;
45	xfs_trans_add_item(tp, &iip->ili_item);
46}
47
48/*
49 * Transactional inode timestamp update. Requires the inode to be locked and
50 * joined to the transaction supplied. Relies on the transaction subsystem to
51 * track dirty state and update/writeback the inode accordingly.
52 */
53void
54xfs_trans_ichgtime(
55	struct xfs_trans	*tp,
56	struct xfs_inode	*ip,
57	int			flags)
58{
59	struct inode		*inode = VFS_I(ip);
60	struct timespec64	tv;
61
62	ASSERT(tp);
63	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
64
65	tv = current_time(inode);
66
67	if (flags & XFS_ICHGTIME_MOD)
68		inode_set_mtime_to_ts(inode, tv);
69	if (flags & XFS_ICHGTIME_CHG)
70		inode_set_ctime_to_ts(inode, tv);
71	if (flags & XFS_ICHGTIME_CREATE)
72		ip->i_crtime = tv;
73}
74
75/*
76 * This is called to mark the fields indicated in fieldmask as needing to be
77 * logged when the transaction is committed.  The inode must already be
78 * associated with the given transaction. All we do here is record where the
79 * inode was dirtied and mark the transaction and inode log item dirty;
80 * everything else is done in the ->precommit log item operation after the
81 * changes in the transaction have been completed.
82 */
83void
84xfs_trans_log_inode(
85	struct xfs_trans	*tp,
86	struct xfs_inode	*ip,
87	uint			flags)
88{
89	struct xfs_inode_log_item *iip = ip->i_itemp;
90	struct inode		*inode = VFS_I(ip);
91
92	ASSERT(iip);
93	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
94	ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
95
96	tp->t_flags |= XFS_TRANS_DIRTY;
97
98	/*
99	 * First time we log the inode in a transaction, bump the inode change
100	 * counter if it is configured for this to occur. While we have the
101	 * inode locked exclusively for metadata modification, we can usually
102	 * avoid setting XFS_ILOG_CORE if no one has queried the value since
103	 * the last time it was incremented. If we have XFS_ILOG_CORE already
104	 * set however, then go ahead and bump the i_version counter
105	 * unconditionally.
106	 */
107	if (!test_and_set_bit(XFS_LI_DIRTY, &iip->ili_item.li_flags)) {
108		if (IS_I_VERSION(inode) &&
109		    inode_maybe_inc_iversion(inode, flags & XFS_ILOG_CORE))
110			flags |= XFS_ILOG_IVERSION;
111	}
112
113	iip->ili_dirty_flags |= flags;
114}
115
116int
117xfs_trans_roll_inode(
118	struct xfs_trans	**tpp,
119	struct xfs_inode	*ip)
120{
121	int			error;
122
123	xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
124	error = xfs_trans_roll(tpp);
125	if (!error)
126		xfs_trans_ijoin(*tpp, ip, 0);
127	return error;
128}
129