korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-24 20:54:10 +08:00
Code Issues Packages Projects Releases Wiki Activity

fscrypto: use standard macros to compute length of fname ciphertext

Browse Source 
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Eric Biggers 2016-09-30 01:46:18 -04:00 committed by Theodore Ts'o
parent cc91542ac8
commit 55be3145d1
1 changed files with 5 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
fs/crypto/fname.c
View File

@ -14,11 +14,6 @@
#include <linux/ratelimit.h>
#include <linux/fscrypto.h>
static u32 size_round_up(size_t size, size_t blksize)
{
return ((size + blksize - 1) / blksize) * blksize;
}
/**
* fname_crypt_complete() - completion callback for filename crypto
* @req: The asynchronous cipher request context
@ -60,10 +55,9 @@ static int fname_encrypt(struct inode *inode,
if (iname->len <= 0 || iname->len > lim)
return -EIO;
ciphertext_len = (iname->len < FS_CRYPTO_BLOCK_SIZE) ?
FS_CRYPTO_BLOCK_SIZE : iname->len;
ciphertext_len = size_round_up(ciphertext_len, padding);
ciphertext_len = (ciphertext_len > lim) ? lim : ciphertext_len;
ciphertext_len = max(iname->len, (u32)FS_CRYPTO_BLOCK_SIZE);
ciphertext_len = round_up(ciphertext_len, padding);
ciphertext_len = min(ciphertext_len, lim);
if (ciphertext_len <= sizeof(buf)) {
workbuf = buf;
@ -233,9 +227,8 @@ u32 fscrypt_fname_encrypted_size(struct inode *inode, u32 ilen)
if (ci)
padding = 4 << (ci->ci_flags & FS_POLICY_FLAGS_PAD_MASK);
if (ilen < FS_CRYPTO_BLOCK_SIZE)
ilen = FS_CRYPTO_BLOCK_SIZE;
return size_round_up(ilen, padding);
ilen = max(ilen, (u32)FS_CRYPTO_BLOCK_SIZE);
return round_up(ilen, padding);
}
EXPORT_SYMBOL(fscrypt_fname_encrypted_size);