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f2fs crypto: get rid of ci_mode from struct f2fs_crypt_info 

This patch integrates the below patch into f2fs.

"ext4 crypto: get rid of ci_mode from struct ext4_crypt_info

The ci_mode field was superfluous, and getting rid of it gets rid of
an unused hole in the structure."

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-05-12 13:33:00 -07:00
parent 8bacf6deb0
commit 640778fbc9
4 changed files with 13 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/f2fs/crypto.c
View File

@ -151,14 +151,13 @@ struct f2fs_crypto_ctx *f2fs_get_crypto_ctx(struct inode *inode)
* Allocate a new Crypto API context if we don't already have * Allocate a new Crypto API context if we don't already have
* one or if it isn't the right mode. * one or if it isn't the right mode.
*/ */
BUG_ON(ci->ci_mode == F2FS_ENCRYPTION_MODE_INVALID); if (ctx->tfm && (ctx->mode != ci->ci_data_mode)) {
if (ctx->tfm && (ctx->mode != ci->ci_mode)) {
crypto_free_tfm(ctx->tfm); crypto_free_tfm(ctx->tfm);
ctx->tfm = NULL; ctx->tfm = NULL;
ctx->mode = F2FS_ENCRYPTION_MODE_INVALID; ctx->mode = F2FS_ENCRYPTION_MODE_INVALID;
} }
if (!ctx->tfm) { if (!ctx->tfm) {
switch (ci->ci_mode) { switch (ci->ci_data_mode) {
case F2FS_ENCRYPTION_MODE_AES_256_XTS: case F2FS_ENCRYPTION_MODE_AES_256_XTS:
ctx->tfm = crypto_ablkcipher_tfm( ctx->tfm = crypto_ablkcipher_tfm(
crypto_alloc_ablkcipher("xts(aes)", 0, 0)); crypto_alloc_ablkcipher("xts(aes)", 0, 0));
@ -178,9 +177,9 @@ struct f2fs_crypto_ctx *f2fs_get_crypto_ctx(struct inode *inode)
ctx->tfm = NULL; ctx->tfm = NULL;
goto out; goto out;
} }
ctx->mode = ci->ci_mode; ctx->mode = ci->ci_data_mode;
} }
BUG_ON(ci->ci_size != f2fs_encryption_key_size(ci->ci_mode)); BUG_ON(ci->ci_size != f2fs_encryption_key_size(ci->ci_data_mode));
/* /*
* There shouldn't be a bounce page attached to the crypto * There shouldn't be a bounce page attached to the crypto
@ -388,7 +387,7 @@ static int f2fs_page_crypto(struct f2fs_crypto_ctx *ctx,
int res = 0; int res = 0;
BUG_ON(!ctx->tfm); BUG_ON(!ctx->tfm);
BUG_ON(ctx->mode != fi->i_crypt_info->ci_mode); BUG_ON(ctx->mode != fi->i_crypt_info->ci_data_mode);
if (ctx->mode != F2FS_ENCRYPTION_MODE_AES_256_XTS) { if (ctx->mode != F2FS_ENCRYPTION_MODE_AES_256_XTS) {
printk_ratelimited(KERN_ERR printk_ratelimited(KERN_ERR

4
fs/f2fs/crypto_fname.c
View File

@ -269,9 +269,9 @@ int f2fs_setup_fname_crypto(struct inode *inode)
if (!ci || ci->ci_ctfm) if (!ci || ci->ci_ctfm)
return 0; return 0;
if (ci->ci_mode != F2FS_ENCRYPTION_MODE_AES_256_CTS) { if (ci->ci_filename_mode != F2FS_ENCRYPTION_MODE_AES_256_CTS) {
printk_once(KERN_WARNING "f2fs: unsupported key mode %d\n", printk_once(KERN_WARNING "f2fs: unsupported key mode %d\n",
ci->ci_mode); ci->ci_filename_mode);
return -ENOKEY; return -ENOKEY;
} }

12
fs/f2fs/crypto_key.c
View File

@ -148,14 +148,14 @@ int _f2fs_get_encryption_info(struct inode *inode)
memcpy(crypt_info->ci_master_key, ctx.master_key_descriptor, memcpy(crypt_info->ci_master_key, ctx.master_key_descriptor,
sizeof(crypt_info->ci_master_key)); sizeof(crypt_info->ci_master_key));
if (S_ISREG(inode->i_mode)) if (S_ISREG(inode->i_mode))
crypt_info->ci_mode = ctx.contents_encryption_mode; crypt_info->ci_size =
f2fs_encryption_key_size(crypt_info->ci_data_mode);
else if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) else if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
crypt_info->ci_mode = ctx.filenames_encryption_mode; crypt_info->ci_size =
else { f2fs_encryption_key_size(crypt_info->ci_filename_mode);
printk(KERN_ERR "f2fs crypto: Unsupported inode type.\n"); else
BUG(); BUG();
}
crypt_info->ci_size = f2fs_encryption_key_size(crypt_info->ci_mode);
BUG_ON(!crypt_info->ci_size); BUG_ON(!crypt_info->ci_size);
memcpy(full_key_descriptor, F2FS_KEY_DESC_PREFIX, memcpy(full_key_descriptor, F2FS_KEY_DESC_PREFIX,

1
fs/f2fs/f2fs_crypto.h
View File

@ -75,7 +75,6 @@ struct f2fs_encryption_key {
} __attribute__((__packed__)); } __attribute__((__packed__));
struct f2fs_crypt_info { struct f2fs_crypt_info {
unsigned char ci_mode;
unsigned char ci_size; unsigned char ci_size;
char ci_data_mode; char ci_data_mode;
char ci_filename_mode; char ci_filename_mode;