diff options
| author | Eric Biggers <ebiggers@google.com> | 2019-05-20 09:29:43 -0700 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2019-05-28 10:27:52 -0700 |
| commit | 03569f2fb8e734f281379767de674e23c38b0b14 (patch) | |
| tree | 13c222b83eaf83f30c2ae175c9f539033bec44a7 /include/linux/fscrypt.h | |
| parent | eeacfdc68a104967162dfcba60f53f6f5b62a334 (diff) | |
fscrypt: introduce fscrypt_encrypt_block_inplace()
fscrypt_encrypt_page() behaves very differently depending on whether the
filesystem set FS_CFLG_OWN_PAGES in its fscrypt_operations. This makes
the function difficult to understand and document. It also makes it so
that all callers have to provide inode and lblk_num, when fscrypt could
determine these itself for pagecache pages.
Therefore, move the FS_CFLG_OWN_PAGES behavior into a new function
fscrypt_encrypt_block_inplace().
This is in preparation for allowing encryption on ext4 filesystems with
blocksize != PAGE_SIZE.
Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'include/linux/fscrypt.h')
| -rw-r--r-- | include/linux/fscrypt.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h index 1c7287f146a9..a9b2d26e615d 100644 --- a/include/linux/fscrypt.h +++ b/include/linux/fscrypt.h @@ -106,6 +106,10 @@ extern void fscrypt_release_ctx(struct fscrypt_ctx *); extern struct page *fscrypt_encrypt_page(const struct inode *, struct page *, unsigned int, unsigned int, u64, gfp_t); +extern int fscrypt_encrypt_block_inplace(const struct inode *inode, + struct page *page, unsigned int len, + unsigned int offs, u64 lblk_num, + gfp_t gfp_flags); extern int fscrypt_decrypt_page(const struct inode *, struct page *, unsigned int, unsigned int, u64); @@ -293,6 +297,15 @@ static inline struct page *fscrypt_encrypt_page(const struct inode *inode, return ERR_PTR(-EOPNOTSUPP); } +static inline int fscrypt_encrypt_block_inplace(const struct inode *inode, + struct page *page, + unsigned int len, + unsigned int offs, u64 lblk_num, + gfp_t gfp_flags) +{ + return -EOPNOTSUPP; +} + static inline int fscrypt_decrypt_page(const struct inode *inode, struct page *page, unsigned int len, unsigned int offs, |