fs/xfs/libxfs/xfs_trans_inode.c

Source file repositories/reference/linux-study-clean/fs/xfs/libxfs/xfs_trans_inode.c

File Facts

System
Linux kernel
Corpus path
fs/xfs/libxfs/xfs_trans_inode.c
Extension
.c
Size
3526 bytes
Lines
131
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs_platform.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_inode_item.h"

#include <linux/iversion.h>

/*
 * Add a locked inode to the transaction.
 *
 * The inode must be locked, and it cannot be associated with any transaction.
 * If lock_flags is non-zero the inode will be unlocked on transaction commit.
 */
void
xfs_trans_ijoin(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	uint			lock_flags)
{
	struct xfs_inode_log_item *iip;

	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
	if (ip->i_itemp == NULL)
		xfs_inode_item_init(ip, ip->i_mount);
	iip = ip->i_itemp;

	ASSERT(iip->ili_lock_flags == 0);
	iip->ili_lock_flags = lock_flags;
	ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));

	/* Reset the per-tx dirty context and add the item to the tx. */
	iip->ili_dirty_flags = 0;
	xfs_trans_add_item(tp, &iip->ili_item);
}

/*
 * Transactional inode timestamp update. Requires the inode to be locked and
 * joined to the transaction supplied. Relies on the transaction subsystem to
 * track dirty state and update/writeback the inode accordingly.
 */
void
xfs_trans_ichgtime(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	int			flags)
{
	struct inode		*inode = VFS_I(ip);
	struct timespec64	tv;

	ASSERT(tp);
	xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);

	/* If the mtime changes, then ctime must also change */
	ASSERT(flags & XFS_ICHGTIME_CHG);

	tv = inode_set_ctime_current(inode);
	if (flags & XFS_ICHGTIME_MOD)
		inode_set_mtime_to_ts(inode, tv);
	if (flags & XFS_ICHGTIME_ACCESS)
		inode_set_atime_to_ts(inode, tv);
	if (flags & XFS_ICHGTIME_CREATE)
		ip->i_crtime = tv;
}

/*
 * This is called to mark the fields indicated in fieldmask as needing to be
 * logged when the transaction is committed.  The inode must already be
 * associated with the given transaction. All we do here is record where the
 * inode was dirtied and mark the transaction and inode log item dirty;
 * everything else is done in the ->precommit log item operation after the
 * changes in the transaction have been completed.
 */
void
xfs_trans_log_inode(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	uint			flags)
{

Annotation

Implementation Notes