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_inode.h"
12 #include "xfs_trans.h"
13 #include "xfs_trans_priv.h"
14 #include "xfs_inode_item.h"
15
16 #include <linux/iversion.h>
17
18 /*
19 * Add a locked inode to the transaction.
20 *
21 * The inode must be locked, and it cannot be associated with any transaction.
22 * If lock_flags is non-zero the inode will be unlocked on transaction commit.
23 */
24 void
xfs_trans_ijoin(struct xfs_trans * tp,struct xfs_inode * ip,uint lock_flags)25 xfs_trans_ijoin(
26 struct xfs_trans *tp,
27 struct xfs_inode *ip,
28 uint lock_flags)
29 {
30 struct xfs_inode_log_item *iip;
31
32 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
33 if (ip->i_itemp == NULL)
34 xfs_inode_item_init(ip, ip->i_mount);
35 iip = ip->i_itemp;
36
37 ASSERT(iip->ili_lock_flags == 0);
38 iip->ili_lock_flags = lock_flags;
39 ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
40
41 /*
42 * Get a log_item_desc to point at the new item.
43 */
44 xfs_trans_add_item(tp, &iip->ili_item);
45 }
46
47 /*
48 * Transactional inode timestamp update. Requires the inode to be locked and
49 * joined to the transaction supplied. Relies on the transaction subsystem to
50 * track dirty state and update/writeback the inode accordingly.
51 */
52 void
xfs_trans_ichgtime(struct xfs_trans * tp,struct xfs_inode * ip,int flags)53 xfs_trans_ichgtime(
54 struct xfs_trans *tp,
55 struct xfs_inode *ip,
56 int flags)
57 {
58 struct inode *inode = VFS_I(ip);
59 struct timespec64 tv;
60
61 ASSERT(tp);
62 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
63
64 tv = current_time(inode);
65
66 if (flags & XFS_ICHGTIME_MOD)
67 inode->i_mtime = tv;
68 if (flags & XFS_ICHGTIME_CHG)
69 inode->i_ctime = tv;
70 if (flags & XFS_ICHGTIME_CREATE) {
71 ip->i_d.di_crtime.t_sec = (int32_t)tv.tv_sec;
72 ip->i_d.di_crtime.t_nsec = (int32_t)tv.tv_nsec;
73 }
74 }
75
76 /*
77 * This is called to mark the fields indicated in fieldmask as needing
78 * to be logged when the transaction is committed. The inode must
79 * already be associated with the given transaction.
80 *
81 * The values for fieldmask are defined in xfs_inode_item.h. We always
82 * log all of the core inode if any of it has changed, and we always log
83 * all of the inline data/extents/b-tree root if any of them has changed.
84 */
85 void
xfs_trans_log_inode(xfs_trans_t * tp,xfs_inode_t * ip,uint flags)86 xfs_trans_log_inode(
87 xfs_trans_t *tp,
88 xfs_inode_t *ip,
89 uint flags)
90 {
91 struct inode *inode = VFS_I(ip);
92
93 ASSERT(ip->i_itemp != NULL);
94 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
95 ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
96
97 /*
98 * Don't bother with i_lock for the I_DIRTY_TIME check here, as races
99 * don't matter - we either will need an extra transaction in 24 hours
100 * to log the timestamps, or will clear already cleared fields in the
101 * worst case.
102 */
103 if (inode->i_state & I_DIRTY_TIME) {
104 spin_lock(&inode->i_lock);
105 inode->i_state &= ~I_DIRTY_TIME;
106 spin_unlock(&inode->i_lock);
107 }
108
109 /*
110 * Record the specific change for fdatasync optimisation. This
111 * allows fdatasync to skip log forces for inodes that are only
112 * timestamp dirty. We do this before the change count so that
113 * the core being logged in this case does not impact on fdatasync
114 * behaviour.
115 */
116 ip->i_itemp->ili_fsync_fields |= flags;
117
118 /*
119 * First time we log the inode in a transaction, bump the inode change
120 * counter if it is configured for this to occur. While we have the
121 * inode locked exclusively for metadata modification, we can usually
122 * avoid setting XFS_ILOG_CORE if no one has queried the value since
123 * the last time it was incremented. If we have XFS_ILOG_CORE already
124 * set however, then go ahead and bump the i_version counter
125 * unconditionally.
126 */
127 if (!test_and_set_bit(XFS_LI_DIRTY, &ip->i_itemp->ili_item.li_flags) &&
128 IS_I_VERSION(VFS_I(ip))) {
129 if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE))
130 flags |= XFS_ILOG_CORE;
131 }
132
133 tp->t_flags |= XFS_TRANS_DIRTY;
134
135 /*
136 * Always OR in the bits from the ili_last_fields field.
137 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
138 * routines in the eventual clearing of the ili_fields bits.
139 * See the big comment in xfs_iflush() for an explanation of
140 * this coordination mechanism.
141 */
142 flags |= ip->i_itemp->ili_last_fields;
143 ip->i_itemp->ili_fields |= flags;
144 }
145
146 int
xfs_trans_roll_inode(struct xfs_trans ** tpp,struct xfs_inode * ip)147 xfs_trans_roll_inode(
148 struct xfs_trans **tpp,
149 struct xfs_inode *ip)
150 {
151 int error;
152
153 xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
154 error = xfs_trans_roll(tpp);
155 if (!error)
156 xfs_trans_ijoin(*tpp, ip, 0);
157 return error;
158 }
159