linux/fs/xfs/xfs_iunlink_item.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2020-2022, Red Hat, Inc.
 * All Rights Reserved.
 */
#include "xfs.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_ag.h"
#include "xfs_iunlink_item.h"
#include "xfs_trace.h"
#include "xfs_error.h"

struct kmem_cache	*xfs_iunlink_cache;

static inline struct xfs_iunlink_item *IUL_ITEM(struct xfs_log_item *lip)
{ … }

static void
xfs_iunlink_item_release(
	struct xfs_log_item	*lip)
{ … }


static uint64_t
xfs_iunlink_item_sort(
	struct xfs_log_item	*lip)
{ … }

/*
 * Look up the inode cluster buffer and log the on-disk unlinked inode change
 * we need to make.
 */
static int
xfs_iunlink_log_dinode(
	struct xfs_trans	*tp,
	struct xfs_iunlink_item	*iup)
{ … }

/*
 * On precommit, we grab the inode cluster buffer for the inode number we were
 * passed, then update the next unlinked field for that inode in the buffer and
 * log the buffer. This ensures that the inode cluster buffer was logged in the
 * correct order w.r.t. other inode cluster buffers. We can then remove the
 * iunlink item from the transaction and release it as it is has now served it's
 * purpose.
 */
static int
xfs_iunlink_item_precommit(
	struct xfs_trans	*tp,
	struct xfs_log_item	*lip)
{ … }

static const struct xfs_item_ops xfs_iunlink_item_ops = …;


/*
 * Initialize the inode log item for a newly allocated (in-core) inode.
 *
 * Inode extents can only reside within an AG. Hence specify the starting
 * block for the inode chunk by offset within an AG as well as the
 * length of the allocated extent.
 *
 * This joins the item to the transaction and marks it dirty so
 * that we don't need a separate call to do this, nor does the
 * caller need to know anything about the iunlink item.
 */
int
xfs_iunlink_log_inode(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	struct xfs_perag	*pag,
	xfs_agino_t		next_agino)
{ … }