From: Eric Biggers Date: Mon, 5 Dec 2016 19:12:45 +0000 (-0800) Subject: fscrypt: use ENOTDIR when setting encryption policy on nondirectory X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=dffd0cfa06d4ed83bb3ae8eb067989ceec5d18e1;p=openwrt%2Fstaging%2Fblogic.git 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 Signed-off-by: Theodore Ts'o --- diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c index d6cd7ea4851d..40ecd7173e34 100644 --- a/fs/crypto/policy.c +++ b/fs/crypto/policy.c @@ -116,7 +116,7 @@ int fscrypt_ioctl_set_policy(struct file *filp, const void __user *arg) if (!inode_has_encryption_context(inode)) { if (!S_ISDIR(inode->i_mode)) - ret = -EINVAL; + ret = -ENOTDIR; else if (!inode->i_sb->s_cop->empty_dir) ret = -EOPNOTSUPP; else if (!inode->i_sb->s_cop->empty_dir(inode))