Commit 5da8f2f8 authored Jun 16, 2017 by Darrick J. Wong

xfs: allow reading of already-locked remote symbolic link



Expose the readlink variant that doesn't take the inode lock so that
the scrubber can inspect symlink contents.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

parent ad017f65

fs/xfs/xfs_symlink.c

+3 −3

Original line number	Original line	Diff line number	Diff line
	@@ -43,8 +43,8 @@
	#include "xfs_log.h"		#include "xfs_log.h"

	/* ----- Kernel only functions below ----- */		/* ----- Kernel only functions below ----- */
	STATIC int		int
	xfs_readlink_bmap(		xfs_readlink_bmap_ilocked(
	struct xfs_inode *ip,		struct xfs_inode *ip,
	char *link)		char *link)
	{		{
	@@ -153,7 +153,7 @@ xfs_readlink(
	}		}


	error = xfs_readlink_bmap(ip, link);		error = xfs_readlink_bmap_ilocked(ip, link);

	out:		out:
	xfs_iunlock(ip, XFS_ILOCK_SHARED);		xfs_iunlock(ip, XFS_ILOCK_SHARED);

fs/xfs/xfs_symlink.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -21,6 +21,7 @@

	int xfs_symlink(struct xfs_inode dp, struct xfs_name link_name,		int xfs_symlink(struct xfs_inode dp, struct xfs_name link_name,
	const char target_path, umode_t mode, struct xfs_inode *ipp);		const char target_path, umode_t mode, struct xfs_inode *ipp);
			int xfs_readlink_bmap_ilocked(struct xfs_inode ip, char link);
	int xfs_readlink(struct xfs_inode ip, char link);		int xfs_readlink(struct xfs_inode ip, char link);
	int xfs_inactive_symlink(struct xfs_inode *ip);		int xfs_inactive_symlink(struct xfs_inode *ip);