tree fc111c5401f15cd5421fc73372d3f4589716af4f
parent 32f4aeb31583a85c1e9a5d6d485055c090cebbfb
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1295456993 +0900
committer Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1299563909 +0900

nilfs2: tighten restrictions on inode flags

Nilfs has few rectrictions on which flags may be set on which inodes
like ext2/3/4 filesystems used to be.  Specifically DIRSYNC may only
be set on directories and IMMUTABLE and APPEND may not be set on
links.  Tighten that to disallow TOPDIR being set on non-directories
and only NODUMP and NOATIME to be set on non-regular file,
non-directories.

This introduces a flags masking function like those of extN and uses
it during inode creation.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>