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69 lines
1.6 KiB
69 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2017 Oracle. All Rights Reserved. |
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* Author: Darrick J. Wong <[email protected]> |
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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 "scrub/scrub.h" |
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#include "scrub/common.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, GFP_KERNEL); |
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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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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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goto out; |
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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_u1.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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goto out; |
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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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goto out; |
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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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out: |
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return error; |
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}
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