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	/* If the mtime changes, then ctime must also change */
 66	ASSERT(flags & XFS_ICHGTIME_CHG);
 67
 68	tv = inode_set_ctime_current(inode);
 69	if (flags & XFS_ICHGTIME_MOD)
 70		inode_set_mtime_to_ts(inode, tv);
 71	if (flags & XFS_ICHGTIME_ACCESS)
 72		inode_set_atime_to_ts(inode, tv);
 73	if (flags & XFS_ICHGTIME_CREATE)
 74		ip->i_crtime = tv;
 75}
 76
 77/*
 78 * This is called to mark the fields indicated in fieldmask as needing to be
 79 * logged when the transaction is committed.  The inode must already be
 80 * associated with the given transaction. All we do here is record where the
 81 * inode was dirtied and mark the transaction and inode log item dirty;
 82 * everything else is done in the ->precommit log item operation after the
 83 * changes in the transaction have been completed.
 84 */
 85void
 86xfs_trans_log_inode(
 87	struct xfs_trans	*tp,
 88	struct xfs_inode	*ip,
 89	uint			flags)
 90{
 91	struct xfs_inode_log_item *iip = ip->i_itemp;
 92	struct inode		*inode = VFS_I(ip);
 93
 94	ASSERT(iip);
 95	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
 96	ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
 97
 98	tp->t_flags |= XFS_TRANS_DIRTY;
 99
100	/*
101	 * First time we log the inode in a transaction, bump the inode change
102	 * counter if it is configured for this to occur. While we have the
103	 * inode locked exclusively for metadata modification, we can usually
104	 * avoid setting XFS_ILOG_CORE if no one has queried the value since
105	 * the last time it was incremented. If we have XFS_ILOG_CORE already
106	 * set however, then go ahead and bump the i_version counter
107	 * unconditionally.
108	 */
109	if (!test_and_set_bit(XFS_LI_DIRTY, &iip->ili_item.li_flags)) {
110		if (IS_I_VERSION(inode) &&
111		    inode_maybe_inc_iversion(inode, flags & XFS_ILOG_CORE))
112			flags |= XFS_ILOG_IVERSION;
113	}
114
115	iip->ili_dirty_flags |= flags;
116}
117
118int
119xfs_trans_roll_inode(
120	struct xfs_trans	**tpp,
121	struct xfs_inode	*ip)
122{
123	int			error;
124
125	xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
126	error = xfs_trans_roll(tpp);
127	if (!error)
128		xfs_trans_ijoin(*tpp, ip, 0);
129	return error;
130}