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Diffstat (limited to 'fs/crypto/inline_crypt.c')
-rw-r--r--fs/crypto/inline_crypt.c32
1 files changed, 17 insertions, 15 deletions
diff --git a/fs/crypto/inline_crypt.c b/fs/crypto/inline_crypt.c
index 8bfb3ce864..b4002aea7c 100644
--- a/fs/crypto/inline_crypt.c
+++ b/fs/crypto/inline_crypt.c
@@ -39,11 +39,11 @@ static struct block_device **fscrypt_get_devices(struct super_block *sb,
return devs;
}
-static unsigned int fscrypt_get_dun_bytes(const struct fscrypt_info *ci)
+static unsigned int fscrypt_get_dun_bytes(const struct fscrypt_inode_info *ci)
{
- struct super_block *sb = ci->ci_inode->i_sb;
+ const struct super_block *sb = ci->ci_inode->i_sb;
unsigned int flags = fscrypt_policy_flags(&ci->ci_policy);
- int ino_bits = 64, lblk_bits = 64;
+ int dun_bits;
if (flags & FSCRYPT_POLICY_FLAG_DIRECT_KEY)
return offsetofend(union fscrypt_iv, nonce);
@@ -54,10 +54,9 @@ static unsigned int fscrypt_get_dun_bytes(const struct fscrypt_info *ci)
if (flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_32)
return sizeof(__le32);
- /* Default case: IVs are just the file logical block number */
- if (sb->s_cop->get_ino_and_lblk_bits)
- sb->s_cop->get_ino_and_lblk_bits(sb, &ino_bits, &lblk_bits);
- return DIV_ROUND_UP(lblk_bits, 8);
+ /* Default case: IVs are just the file data unit index */
+ dun_bits = fscrypt_max_file_dun_bits(sb, ci->ci_data_unit_bits);
+ return DIV_ROUND_UP(dun_bits, 8);
}
/*
@@ -90,7 +89,7 @@ static void fscrypt_log_blk_crypto_impl(struct fscrypt_mode *mode,
}
/* Enable inline encryption for this file if supported. */
-int fscrypt_select_encryption_impl(struct fscrypt_info *ci)
+int fscrypt_select_encryption_impl(struct fscrypt_inode_info *ci)
{
const struct inode *inode = ci->ci_inode;
struct super_block *sb = inode->i_sb;
@@ -129,7 +128,7 @@ int fscrypt_select_encryption_impl(struct fscrypt_info *ci)
* crypto configuration that the file would use.
*/
crypto_cfg.crypto_mode = ci->ci_mode->blk_crypto_mode;
- crypto_cfg.data_unit_size = sb->s_blocksize;
+ crypto_cfg.data_unit_size = 1U << ci->ci_data_unit_bits;
crypto_cfg.dun_bytes = fscrypt_get_dun_bytes(ci);
devs = fscrypt_get_devices(sb, &num_devs);
@@ -152,7 +151,7 @@ out_free_devs:
int fscrypt_prepare_inline_crypt_key(struct fscrypt_prepared_key *prep_key,
const u8 *raw_key,
- const struct fscrypt_info *ci)
+ const struct fscrypt_inode_info *ci)
{
const struct inode *inode = ci->ci_inode;
struct super_block *sb = inode->i_sb;
@@ -168,7 +167,8 @@ int fscrypt_prepare_inline_crypt_key(struct fscrypt_prepared_key *prep_key,
return -ENOMEM;
err = blk_crypto_init_key(blk_key, raw_key, crypto_mode,
- fscrypt_get_dun_bytes(ci), sb->s_blocksize);
+ fscrypt_get_dun_bytes(ci),
+ 1U << ci->ci_data_unit_bits);
if (err) {
fscrypt_err(inode, "error %d initializing blk-crypto key", err);
goto fail;
@@ -232,13 +232,15 @@ bool __fscrypt_inode_uses_inline_crypto(const struct inode *inode)
}
EXPORT_SYMBOL_GPL(__fscrypt_inode_uses_inline_crypto);
-static void fscrypt_generate_dun(const struct fscrypt_info *ci, u64 lblk_num,
+static void fscrypt_generate_dun(const struct fscrypt_inode_info *ci,
+ u64 lblk_num,
u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE])
{
+ u64 index = lblk_num << ci->ci_data_units_per_block_bits;
union fscrypt_iv iv;
int i;
- fscrypt_generate_iv(&iv, lblk_num, ci);
+ fscrypt_generate_iv(&iv, index, ci);
BUILD_BUG_ON(FSCRYPT_MAX_IV_SIZE > BLK_CRYPTO_MAX_IV_SIZE);
memset(dun, 0, BLK_CRYPTO_MAX_IV_SIZE);
@@ -265,7 +267,7 @@ static void fscrypt_generate_dun(const struct fscrypt_info *ci, u64 lblk_num,
void fscrypt_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,
u64 first_lblk, gfp_t gfp_mask)
{
- const struct fscrypt_info *ci;
+ const struct fscrypt_inode_info *ci;
u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE];
if (!fscrypt_inode_uses_inline_crypto(inode))
@@ -456,7 +458,7 @@ EXPORT_SYMBOL_GPL(fscrypt_dio_supported);
*/
u64 fscrypt_limit_io_blocks(const struct inode *inode, u64 lblk, u64 nr_blocks)
{
- const struct fscrypt_info *ci;
+ const struct fscrypt_inode_info *ci;
u32 dun;
if (!fscrypt_inode_uses_inline_crypto(inode))