Commit cb9179ea authored Aug 28, 2009 by Linus Torvalds

Simplify exec_permission_lite(), part 3



Don't call down to the generic inode_permission() function just to
call the inode-specific permission function - just do it directly.

The generic inode_permission() code does things like checking MAY_WRITE
and devcgroup_inode_permission(), neither of which are relevant for the
light pathname walk permission checks (we always do just MAY_EXEC, and
the inode is never a special device).

Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent f1ac9f6b

fs/namei.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -434,8 +434,12 @@ static int exec_permission_lite(struct inode *inode)
		{
		umode_t mode = inode->i_mode;

		if (inode->i_op->permission)
		return inode_permission(inode, MAY_EXEC);
		if (inode->i_op->permission) {
		int ret = inode->i_op->permission(inode, MAY_EXEC);
		if (!ret)
		goto ok;
		return ret;
		}

		if (current_fsuid() == inode->i_uid)
		mode >>= 6;