diff options
| author | Eric Biggers <ebiggers@google.com> | 2017-04-04 23:39:41 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-04-30 07:26:34 +0200 |
| commit | cd39e4bac11125bc32ba6101b1ceb46ef773f4b6 (patch) | |
| tree | 11f17b3e501c7bf09dee2fcc06ea38751e7fa7f3 /fs/crypto | |
| parent | Linux 4.11-rc6 (diff) | |
| download | linux-cd39e4bac11125bc32ba6101b1ceb46ef773f4b6.tar.xz linux-cd39e4bac11125bc32ba6101b1ceb46ef773f4b6.zip | |
fscrypt: remove unnecessary checks for NULL operations
The functions in fs/crypto/*.c are only called by filesystems configured
with encryption support. Since the ->get_context(), ->set_context(),
and ->empty_dir() operations are always provided in that case (and must
be, otherwise there would be no way to get/set encryption policies, or
in the case of ->get_context() even access encrypted files at all),
there is no need to check for these operations being NULL and we can
remove these unneeded checks.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/crypto')
| -rw-r--r-- | fs/crypto/keyinfo.c | 3 | ||||
| -rw-r--r-- | fs/crypto/policy.c | 11 |
2 files changed, 1 insertions, 13 deletions
diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c index 8cdfddce2b34..179e578b875b 100644 --- a/fs/crypto/keyinfo.c +++ b/fs/crypto/keyinfo.c @@ -183,9 +183,6 @@ int fscrypt_get_encryption_info(struct inode *inode) if (res) return res; - if (!inode->i_sb->s_cop->get_context) - return -EOPNOTSUPP; - res = inode->i_sb->s_cop->get_context(inode, &ctx, sizeof(ctx)); if (res < 0) { if (!fscrypt_dummy_context_enabled(inode) || diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c index 4908906d54d5..d71ec3780d0c 100644 --- a/fs/crypto/policy.c +++ b/fs/crypto/policy.c @@ -34,9 +34,6 @@ static int create_encryption_context_from_policy(struct inode *inode, { struct fscrypt_context ctx; - if (!inode->i_sb->s_cop->set_context) - return -EOPNOTSUPP; - ctx.format = FS_ENCRYPTION_CONTEXT_FORMAT_V1; memcpy(ctx.master_key_descriptor, policy->master_key_descriptor, FS_KEY_DESCRIPTOR_SIZE); @@ -87,8 +84,6 @@ int fscrypt_ioctl_set_policy(struct file *filp, const void __user *arg) if (ret == -ENODATA) { if (!S_ISDIR(inode->i_mode)) ret = -ENOTDIR; - else if (!inode->i_sb->s_cop->empty_dir) - ret = -EOPNOTSUPP; else if (!inode->i_sb->s_cop->empty_dir(inode)) ret = -ENOTEMPTY; else @@ -118,8 +113,7 @@ int fscrypt_ioctl_get_policy(struct file *filp, void __user *arg) struct fscrypt_policy policy; int res; - if (!inode->i_sb->s_cop->get_context || - !inode->i_sb->s_cop->is_encrypted(inode)) + if (!inode->i_sb->s_cop->is_encrypted(inode)) return -ENODATA; res = inode->i_sb->s_cop->get_context(inode, &ctx, sizeof(ctx)); @@ -202,9 +196,6 @@ int fscrypt_inherit_context(struct inode *parent, struct inode *child, struct fscrypt_info *ci; int res; - if (!parent->i_sb->s_cop->set_context) - return -EOPNOTSUPP; - res = fscrypt_get_encryption_info(parent); if (res < 0) return res; |