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authorEric Biggers <ebiggers@google.com>2019-05-20 09:29:41 -0700
committerEric Biggers <ebiggers@google.com>2019-05-28 10:27:52 -0700
commitf47fcbb2b578bdb213d9ac5875aab56a2034d466 (patch)
tree2303eae811faf83ca3573685a8cafe248eeab1ab /fs/crypto
parent2a415a0257314cb2e49fb9ac4c6770837112f261 (diff)
fscrypt: rename fscrypt_do_page_crypto() to fscrypt_crypt_block()
fscrypt_do_page_crypto() only does a single encryption or decryption operation, with a single logical block number (single IV). So it actually operates on a filesystem block, not a "page" per se. To reflect this, rename it to fscrypt_crypt_block(). Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/crypto')
-rw-r--r--fs/crypto/bio.c6
-rw-r--r--fs/crypto/crypto.c24
-rw-r--r--fs/crypto/fscrypt_private.h11
3 files changed, 20 insertions, 21 deletions
diff --git a/fs/crypto/bio.c b/fs/crypto/bio.c
index c53425348387..92b2d5da5d8e 100644
--- a/fs/crypto/bio.c
+++ b/fs/crypto/bio.c
@@ -83,9 +83,9 @@ int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
return -ENOMEM;
while (len--) {
- err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk,
- ZERO_PAGE(0), ciphertext_page,
- PAGE_SIZE, 0, GFP_NOFS);
+ err = fscrypt_crypt_block(inode, FS_ENCRYPT, lblk,
+ ZERO_PAGE(0), ciphertext_page,
+ PAGE_SIZE, 0, GFP_NOFS);
if (err)
goto errout;
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index 9dd7a643eae0..a798c52e3dc9 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -148,10 +148,11 @@ void fscrypt_generate_iv(union fscrypt_iv *iv, u64 lblk_num,
crypto_cipher_encrypt_one(ci->ci_essiv_tfm, iv->raw, iv->raw);
}
-int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw,
- u64 lblk_num, struct page *src_page,
- struct page *dest_page, unsigned int len,
- unsigned int offs, gfp_t gfp_flags)
+/* Encrypt or decrypt a single filesystem block of file contents */
+int fscrypt_crypt_block(const struct inode *inode, fscrypt_direction_t rw,
+ u64 lblk_num, struct page *src_page,
+ struct page *dest_page, unsigned int len,
+ unsigned int offs, gfp_t gfp_flags)
{
union fscrypt_iv iv;
struct skcipher_request *req = NULL;
@@ -228,9 +229,9 @@ struct page *fscrypt_encrypt_page(const struct inode *inode,
if (inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES) {
/* with inplace-encryption we just encrypt the page */
- err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk_num, page,
- ciphertext_page, len, offs,
- gfp_flags);
+ err = fscrypt_crypt_block(inode, FS_ENCRYPT, lblk_num, page,
+ ciphertext_page, len, offs,
+ gfp_flags);
if (err)
return ERR_PTR(err);
@@ -244,9 +245,8 @@ struct page *fscrypt_encrypt_page(const struct inode *inode,
if (!ciphertext_page)
return ERR_PTR(-ENOMEM);
- err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk_num,
- page, ciphertext_page, len, offs,
- gfp_flags);
+ err = fscrypt_crypt_block(inode, FS_ENCRYPT, lblk_num, page,
+ ciphertext_page, len, offs, gfp_flags);
if (err) {
fscrypt_free_bounce_page(ciphertext_page);
return ERR_PTR(err);
@@ -278,8 +278,8 @@ int fscrypt_decrypt_page(const struct inode *inode, struct page *page,
if (!(inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES))
BUG_ON(!PageLocked(page));
- return fscrypt_do_page_crypto(inode, FS_DECRYPT, lblk_num, page, page,
- len, offs, GFP_NOFS);
+ return fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page, page,
+ len, offs, GFP_NOFS);
}
EXPORT_SYMBOL(fscrypt_decrypt_page);
diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h
index 4122ee1a0b7b..8978eec9d766 100644
--- a/fs/crypto/fscrypt_private.h
+++ b/fs/crypto/fscrypt_private.h
@@ -116,12 +116,11 @@ static inline bool fscrypt_valid_enc_modes(u32 contents_mode,
/* crypto.c */
extern struct kmem_cache *fscrypt_info_cachep;
extern int fscrypt_initialize(unsigned int cop_flags);
-extern int fscrypt_do_page_crypto(const struct inode *inode,
- fscrypt_direction_t rw, u64 lblk_num,
- struct page *src_page,
- struct page *dest_page,
- unsigned int len, unsigned int offs,
- gfp_t gfp_flags);
+extern int fscrypt_crypt_block(const struct inode *inode,
+ fscrypt_direction_t rw, u64 lblk_num,
+ struct page *src_page, struct page *dest_page,
+ unsigned int len, unsigned int offs,
+ gfp_t gfp_flags);
extern struct page *fscrypt_alloc_bounce_page(gfp_t gfp_flags);
extern const struct dentry_operations fscrypt_d_ops;