From: Jeffrey Mitchell jeffrey.mitchell@starlab.io
commit 8aa921a95335d0a8c8e2be35a44467e7c91ec3e4 upstream.
When XFS creates a new symlink, it writes its size to disk but not to the VFS inode. This causes i_size_read() to return 0 for that symlink until it is re-read from disk, for example when the system is rebooted.
I found this inconsistency while protecting directories with eCryptFS. The command "stat path/to/symlink/in/ecryptfs" will report "Size: 0" if the symlink was created after the last reboot on an XFS root.
Call i_size_write() in xfs_symlink()
Signed-off-by: Jeffrey Mitchell jeffrey.mitchell@starlab.io Reviewed-by: Darrick J. Wong djwong@kernel.org Signed-off-by: Darrick J. Wong djwong@kernel.org Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Brian Foster bfoster@redhat.com Signed-off-by: Amir Goldstein amir73il@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/xfs/xfs_symlink.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/xfs/xfs_symlink.c +++ b/fs/xfs/xfs_symlink.c @@ -300,6 +300,7 @@ xfs_symlink( } ASSERT(pathlen == 0); } + i_size_write(VFS_I(ip), ip->i_d.di_size);
/* * Create the directory entry for the symlink.