xfs: rename MAXPATHLEN to XFS_SYMLINK_MAXLEN
authorDarrick J. Wong <darrick.wong@oracle.com>
Fri, 7 Jul 2017 15:37:26 +0000 (08:37 -0700)
committerDarrick J. Wong <darrick.wong@oracle.com>
Fri, 7 Jul 2017 15:37:26 +0000 (08:37 -0700)
commit6eb0b8df9f74f33d1a69100117630a7a87a9cc96
tree5e3d151e8403e117bd8207c36b6d1c2a3c8b0ca6
parent2192b0baea395274ffcd38ec70e284389e3c243d
xfs: rename MAXPATHLEN to XFS_SYMLINK_MAXLEN

XFS has a maximum symlink target length of 1024 bytes; this is a
holdover from the Irix days.  Unfortunately, the constant establishing
this is 'MAXPATHLEN' and is /not/ the same as the Linux MAXPATHLEN,
which is 4096.

The kernel enforces its 1024 byte MAXPATHLEN on symlink targets, but
xfsprogs picks up the (Linux) system 4096 byte MAXPATHLEN, which means
that xfs_repair doesn't complain about oversized symlinks.

Since this is an on-disk format constraint, put the define in the XFS
namespace and move everything over to use the new name.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
fs/xfs/libxfs/xfs_format.h
fs/xfs/libxfs/xfs_symlink_remote.c
fs/xfs/libxfs/xfs_trans_resv.c
fs/xfs/xfs_iops.c
fs/xfs/xfs_linux.h
fs/xfs/xfs_symlink.c