diff options
| author | Eric Biggers <ebiggers@google.com> | 2017-10-09 12:15:40 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-01-04 18:20:23 -0800 |
| commit | 2b4b4f98dddf0430cb52d9729a51066fe16153b5 (patch) | |
| tree | 760ed447be247c3fa6f5f551a826363f01c94a3e /include/linux | |
| parent | 8c815f381cd6224828e63dbfb5435bdd58240ed4 (diff) | |
fscrypt: new helper function - fscrypt_file_open()
Add a helper function which prepares to open a regular file which may be
encrypted. It handles setting up the file's encryption key, then
checking that the file's encryption policy matches that of its parent
directory (if the parent directory is encrypted). It may be set as the
->open() method or it can be called from another ->open() method.
Acked-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fscrypt_notsupp.h | 9 | ||||
| -rw-r--r-- | include/linux/fscrypt_supp.h | 3 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/fscrypt_notsupp.h b/include/linux/fscrypt_notsupp.h index 7b390e356f7f..162da6517ac4 100644 --- a/include/linux/fscrypt_notsupp.h +++ b/include/linux/fscrypt_notsupp.h @@ -177,4 +177,13 @@ static inline int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk, return -EOPNOTSUPP; } +/* hooks.c */ + +static inline int fscrypt_file_open(struct inode *inode, struct file *filp) +{ + if (IS_ENCRYPTED(inode)) + return -EOPNOTSUPP; + return 0; +} + #endif /* _LINUX_FSCRYPT_NOTSUPP_H */ diff --git a/include/linux/fscrypt_supp.h b/include/linux/fscrypt_supp.h index 5a90e5ef4687..fd2f6decaee4 100644 --- a/include/linux/fscrypt_supp.h +++ b/include/linux/fscrypt_supp.h @@ -143,4 +143,7 @@ extern void fscrypt_pullback_bio_page(struct page **, bool); extern int fscrypt_zeroout_range(const struct inode *, pgoff_t, sector_t, unsigned int); +/* hooks.c */ +extern int fscrypt_file_open(struct inode *inode, struct file *filp); + #endif /* _LINUX_FSCRYPT_SUPP_H */ |