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The xfs_ifork structure currently has a union of the if_root void pointer and the if_data char pointer. In either case it is an opaque pointer that depends on the fork format. Replace the union with a single if_data void pointer as that is what almost all callers want. Only the symlink NULL termination code in xfs_init_local_fork actually needs a new local variable now. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: "Darrick J. Wong" <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2017-2023 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_log_format.h"
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#include "xfs_inode.h"
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#include "xfs_symlink.h"
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#include "xfs_health.h"
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#include "scrub/scrub.h"
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#include "scrub/common.h"
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#include "scrub/health.h"
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/* Set us up to scrub a symbolic link. */
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int
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xchk_setup_symlink(
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struct xfs_scrub *sc)
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{
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/* Allocate the buffer without the inode lock held. */
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sc->buf = kvzalloc(XFS_SYMLINK_MAXLEN + 1, XCHK_GFP_FLAGS);
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if (!sc->buf)
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return -ENOMEM;
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return xchk_setup_inode_contents(sc, 0);
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}
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/* Symbolic links. */
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int
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xchk_symlink(
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struct xfs_scrub *sc)
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{
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struct xfs_inode *ip = sc->ip;
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struct xfs_ifork *ifp;
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loff_t len;
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int error = 0;
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if (!S_ISLNK(VFS_I(ip)->i_mode))
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return -ENOENT;
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if (xchk_file_looks_zapped(sc, XFS_SICK_INO_SYMLINK_ZAPPED)) {
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xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
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return 0;
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}
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ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
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len = ip->i_disk_size;
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/* Plausible size? */
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if (len > XFS_SYMLINK_MAXLEN || len <= 0) {
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xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
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return 0;
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}
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/* Inline symlink? */
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if (ifp->if_format == XFS_DINODE_FMT_LOCAL) {
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if (len > xfs_inode_data_fork_size(ip) ||
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len > strnlen(ifp->if_data, xfs_inode_data_fork_size(ip)))
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xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
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return 0;
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}
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/* Remote symlink; must read the contents. */
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error = xfs_readlink_bmap_ilocked(sc->ip, sc->buf);
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if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
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return error;
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if (strnlen(sc->buf, XFS_SYMLINK_MAXLEN) < len)
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xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
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/* If a remote symlink is clean, it is clearly not zapped. */
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xchk_mark_healthy_if_clean(sc, XFS_SICK_INO_SYMLINK_ZAPPED);
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return 0;
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}
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