mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-28 06:34:12 +08:00
376b4f0522
Move xfs_readlink_bmap_ilocked to xfs_symlink_remote.c so that the swapext code can use it to convert a remote format symlink back to shortform format after a metadata repair. While we're at it, fix a broken printf prefix. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2017-2023 Oracle. All Rights Reserved.
|
|
* Author: Darrick J. Wong <djwong@kernel.org>
|
|
*/
|
|
#include "xfs.h"
|
|
#include "xfs_fs.h"
|
|
#include "xfs_shared.h"
|
|
#include "xfs_format.h"
|
|
#include "xfs_trans_resv.h"
|
|
#include "xfs_mount.h"
|
|
#include "xfs_log_format.h"
|
|
#include "xfs_inode.h"
|
|
#include "xfs_symlink.h"
|
|
#include "xfs_health.h"
|
|
#include "xfs_symlink_remote.h"
|
|
#include "scrub/scrub.h"
|
|
#include "scrub/common.h"
|
|
#include "scrub/health.h"
|
|
|
|
/* Set us up to scrub a symbolic link. */
|
|
int
|
|
xchk_setup_symlink(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
/* Allocate the buffer without the inode lock held. */
|
|
sc->buf = kvzalloc(XFS_SYMLINK_MAXLEN + 1, XCHK_GFP_FLAGS);
|
|
if (!sc->buf)
|
|
return -ENOMEM;
|
|
|
|
return xchk_setup_inode_contents(sc, 0);
|
|
}
|
|
|
|
/* Symbolic links. */
|
|
|
|
int
|
|
xchk_symlink(
|
|
struct xfs_scrub *sc)
|
|
{
|
|
struct xfs_inode *ip = sc->ip;
|
|
struct xfs_ifork *ifp;
|
|
loff_t len;
|
|
int error = 0;
|
|
|
|
if (!S_ISLNK(VFS_I(ip)->i_mode))
|
|
return -ENOENT;
|
|
|
|
if (xchk_file_looks_zapped(sc, XFS_SICK_INO_SYMLINK_ZAPPED)) {
|
|
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
|
|
return 0;
|
|
}
|
|
|
|
ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
|
|
len = ip->i_disk_size;
|
|
|
|
/* Plausible size? */
|
|
if (len > XFS_SYMLINK_MAXLEN || len <= 0) {
|
|
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* Inline symlink? */
|
|
if (ifp->if_format == XFS_DINODE_FMT_LOCAL) {
|
|
if (len > xfs_inode_data_fork_size(ip) ||
|
|
len > strnlen(ifp->if_data, xfs_inode_data_fork_size(ip)))
|
|
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* Remote symlink; must read the contents. */
|
|
error = xfs_symlink_remote_read(sc->ip, sc->buf);
|
|
if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
|
|
return error;
|
|
if (strnlen(sc->buf, XFS_SYMLINK_MAXLEN) < len)
|
|
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
|
|
|
|
/* If a remote symlink is clean, it is clearly not zapped. */
|
|
xchk_mark_healthy_if_clean(sc, XFS_SICK_INO_SYMLINK_ZAPPED);
|
|
return 0;
|
|
}
|