1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
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"
18 #include <linux/iversion.h>
21 * Add a locked inode to the transaction.
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.
32 struct xfs_inode_log_item *iip;
34 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
35 if (ip->i_itemp == NULL)
36 xfs_inode_item_init(ip, ip->i_mount);
39 ASSERT(iip->ili_lock_flags == 0);
40 iip->ili_lock_flags = lock_flags;
41 ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
44 * Get a log_item_desc to point at the new item.
46 xfs_trans_add_item(tp, &iip->ili_item);
50 * Transactional inode timestamp update. Requires the inode to be locked and
51 * joined to the transaction supplied. Relies on the transaction subsystem to
52 * track dirty state and update/writeback the inode accordingly.
60 struct inode *inode = VFS_I(ip);
64 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
66 tv = current_time(inode);
68 if (flags & XFS_ICHGTIME_MOD)
70 if (flags & XFS_ICHGTIME_CHG)
72 if (flags & XFS_ICHGTIME_CREATE)
73 ip->i_d.di_crtime = tv;
77 * This is called to mark the fields indicated in fieldmask as needing to be
78 * logged when the transaction is committed. The inode must already be
79 * associated with the given transaction.
81 * The values for fieldmask are defined in xfs_inode_item.h. We always log all
82 * of the core inode if any of it has changed, and we always log all of the
83 * inline data/extents/b-tree root if any of them has changed.
85 * Grab and pin the cluster buffer associated with this inode to avoid RMW
86 * cycles at inode writeback time. Avoid the need to add error handling to every
87 * xfs_trans_log_inode() call by shutting down on read error. This will cause
88 * transactions to fail and everything to error out, just like if we return a
89 * read error in a dirty transaction and cancel it.
97 struct xfs_inode_log_item *iip = ip->i_itemp;
98 struct inode *inode = VFS_I(ip);
99 uint iversion_flags = 0;
102 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
103 ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
105 tp->t_flags |= XFS_TRANS_DIRTY;
108 * Don't bother with i_lock for the I_DIRTY_TIME check here, as races
109 * don't matter - we either will need an extra transaction in 24 hours
110 * to log the timestamps, or will clear already cleared fields in the
113 if (inode->i_state & I_DIRTY_TIME) {
114 spin_lock(&inode->i_lock);
115 inode->i_state &= ~I_DIRTY_TIME;
116 spin_unlock(&inode->i_lock);
120 * First time we log the inode in a transaction, bump the inode change
121 * counter if it is configured for this to occur. While we have the
122 * inode locked exclusively for metadata modification, we can usually
123 * avoid setting XFS_ILOG_CORE if no one has queried the value since
124 * the last time it was incremented. If we have XFS_ILOG_CORE already
125 * set however, then go ahead and bump the i_version counter
128 if (!test_and_set_bit(XFS_LI_DIRTY, &iip->ili_item.li_flags)) {
129 if (IS_I_VERSION(inode) &&
130 inode_maybe_inc_iversion(inode, flags & XFS_ILOG_CORE))
131 iversion_flags = XFS_ILOG_CORE;
135 * Record the specific change for fdatasync optimisation. This allows
136 * fdatasync to skip log forces for inodes that are only timestamp
139 spin_lock(&iip->ili_lock);
140 iip->ili_fsync_fields |= flags;
142 if (!iip->ili_item.li_buf) {
147 * We hold the ILOCK here, so this inode is not going to be
148 * flushed while we are here. Further, because there is no
149 * buffer attached to the item, we know that there is no IO in
150 * progress, so nothing will clear the ili_fields while we read
151 * in the buffer. Hence we can safely drop the spin lock and
152 * read the buffer knowing that the state will not change from
155 spin_unlock(&iip->ili_lock);
156 error = xfs_imap_to_bp(ip->i_mount, tp, &ip->i_imap, NULL,
159 xfs_force_shutdown(ip->i_mount, SHUTDOWN_META_IO_ERROR);
164 * We need an explicit buffer reference for the log item but
165 * don't want the buffer to remain attached to the transaction.
166 * Hold the buffer but release the transaction reference once
167 * we've attached the inode log item to the buffer log item
171 spin_lock(&iip->ili_lock);
172 iip->ili_item.li_buf = bp;
173 bp->b_flags |= _XBF_INODES;
174 list_add_tail(&iip->ili_item.li_bio_list, &bp->b_li_list);
175 xfs_trans_brelse(tp, bp);
179 * Always OR in the bits from the ili_last_fields field. This is to
180 * coordinate with the xfs_iflush() and xfs_iflush_done() routines in
181 * the eventual clearing of the ili_fields bits. See the big comment in
182 * xfs_iflush() for an explanation of this coordination mechanism.
184 iip->ili_fields |= (flags | iip->ili_last_fields | iversion_flags);
185 spin_unlock(&iip->ili_lock);
189 xfs_trans_roll_inode(
190 struct xfs_trans **tpp,
191 struct xfs_inode *ip)
195 xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
196 error = xfs_trans_roll(tpp);
198 xfs_trans_ijoin(*tpp, ip, 0);