Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2017 Oracle.  All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Author: Darrick J. Wong <darrick.wong@oracle.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include "xfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include "xfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include "xfs_shared.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include "xfs_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "xfs_trans_resv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "xfs_mount.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "xfs_log_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "xfs_inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "xfs_symlink.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "scrub/scrub.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "scrub/common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /* Set us up to scrub a symbolic link. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) xchk_setup_symlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	struct xfs_scrub	*sc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	struct xfs_inode	*ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	/* Allocate the buffer without the inode lock held. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	sc->buf = kvzalloc(XFS_SYMLINK_MAXLEN + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	if (!sc->buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	return xchk_setup_inode_contents(sc, ip, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* Symbolic links. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) xchk_symlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	struct xfs_scrub	*sc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	struct xfs_inode	*ip = sc->ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	struct xfs_ifork	*ifp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	loff_t			len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	int			error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (!S_ISLNK(VFS_I(ip)->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	len = ip->i_d.di_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	/* Plausible size? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (len > XFS_SYMLINK_MAXLEN || len <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	/* Inline symlink? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	if (ifp->if_flags & XFS_IFINLINE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		if (len > XFS_IFORK_DSIZE(ip) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		    len > strnlen(ifp->if_u1.if_data, XFS_IFORK_DSIZE(ip)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 			xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	/* Remote symlink; must read the contents. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	error = xfs_readlink_bmap_ilocked(sc->ip, sc->buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	if (strnlen(sc->buf, XFS_SYMLINK_MAXLEN) < len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }