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