linux/fs/xfs/libxfs/xfs_symlink_remote.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
 * Copyright (c) 2012-2013 Red Hat, Inc.
 * All rights reserved.
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_shared.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_error.h"
#include "xfs_trans.h"
#include "xfs_buf_item.h"
#include "xfs_log.h"
#include "xfs_symlink_remote.h"
#include "xfs_bit.h"
#include "xfs_bmap.h"
#include "xfs_health.h"

/*
 * Each contiguous block has a header, so it is not just a simple pathlen
 * to FSB conversion.
 */
int
xfs_symlink_blocks(
	struct xfs_mount *mp,
	int		pathlen)
{ … }

int
xfs_symlink_hdr_set(
	struct xfs_mount	*mp,
	xfs_ino_t		ino,
	uint32_t		offset,
	uint32_t		size,
	struct xfs_buf		*bp)
{ … }

/*
 * Checking of the symlink header is split into two parts. the verifier does
 * CRC, location and bounds checking, the unpacking function checks the path
 * parameters and owner.
 */
bool
xfs_symlink_hdr_ok(
	xfs_ino_t		ino,
	uint32_t		offset,
	uint32_t		size,
	struct xfs_buf		*bp)
{ … }

static xfs_failaddr_t
xfs_symlink_verify(
	struct xfs_buf		*bp)
{ … }

static void
xfs_symlink_read_verify(
	struct xfs_buf	*bp)
{ … }

static void
xfs_symlink_write_verify(
	struct xfs_buf	*bp)
{ … }

const struct xfs_buf_ops xfs_symlink_buf_ops = …;

void
xfs_symlink_local_to_remote(
	struct xfs_trans	*tp,
	struct xfs_buf		*bp,
	struct xfs_inode	*ip,
	struct xfs_ifork	*ifp,
	void			*priv)
{ … }

/*
 * Verify the in-memory consistency of an inline symlink data fork. This
 * does not do on-disk format checks.
 */
xfs_failaddr_t
xfs_symlink_shortform_verify(
	void			*sfp,
	int64_t			size)
{ … }

/* Read a remote symlink target into the buffer. */
int
xfs_symlink_remote_read(
	struct xfs_inode	*ip,
	char			*link)
{ … }

/* Write the symlink target into the inode. */
int
xfs_symlink_write_target(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	xfs_ino_t		owner,
	const char		*target_path,
	int			pathlen,
	xfs_fsblock_t		fs_blocks,
	uint			resblks)
{ … }

/* Remove all the blocks from a symlink and invalidate buffers. */
int
xfs_symlink_remote_truncate(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip)
{ … }