tree 8da7b6e52b4727c46f39afd3dabb6dd4e08f0fb5
parent 54475f531bb8d7078f63c159e5e0615d486c498c
author Eric Biggers <ebiggers@google.com> 1480965165 -0800
committer Theodore Ts'o <tytso@mit.edu> 1483219580 -0500

fscrypt: use ENOTDIR when setting encryption policy on nondirectory

As part of an effort to clean up fscrypt-related error codes, make
FS_IOC_SET_ENCRYPTION_POLICY fail with ENOTDIR when the file descriptor
does not refer to a directory.  This is more descriptive than EINVAL,
which was ambiguous with some of the other error cases.

I am not aware of any users who might be relying on the previous error
code of EINVAL, which was never documented anywhere, and in some buggy
kernels did not exist at all as the S_ISDIR() check was missing.

This failure case will be exercised by an xfstest.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>