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f2fs crypto: split f2fs_crypto_init/exit with two parts

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This patch splits f2fs_crypto_init/exit with two parts: base initialization and
memory allocation.

Firstly, f2fs module declares the base encryption memory pointers.
Then, allocating internal memories is done at the first encrypted inode access.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2015-05-15 15:37:24 -07:00
parent b9da898b05
commit cfc4d971df
4 changed files with 66 additions and 48 deletions
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fs/f2fs/f2fs.h
+3 -3
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@@ -2005,7 +2005,6 @@ int f2fs_get_policy(struct inode *, struct f2fs_encryption_policy *);
/* crypt.c */
extern struct kmem_cache *f2fs_crypt_info_cachep;
extern struct workqueue_struct *f2fs_read_workqueue;
bool f2fs_valid_contents_enc_mode(uint32_t);
uint32_t f2fs_validate_encryption_key_size(uint32_t, uint32_t);
struct f2fs_crypto_ctx *f2fs_get_crypto_ctx(struct inode *);
@@ -2032,7 +2031,8 @@ int f2fs_fname_usr_to_disk(struct inode *, const struct qstr *,
void f2fs_restore_and_release_control_page(struct page **);
void f2fs_restore_control_page(struct page *);
int f2fs_init_crypto(void);
int __init f2fs_init_crypto(void);
int f2fs_crypto_initialize(void);
void f2fs_exit_crypto(void);
int f2fs_has_encryption_key(struct inode *);
@@ -2059,7 +2059,7 @@ void f2fs_fname_free_filename(struct f2fs_filename *);
static inline void f2fs_restore_and_release_control_page(struct page **p) { }
static inline void f2fs_restore_control_page(struct page *p) { }
static inline int f2fs_init_crypto(void) { return 0; }
static inline int __init f2fs_init_crypto(void) { return 0; }
static inline void f2fs_exit_crypto(void) { }
static inline int f2fs_has_encryption_key(struct inode *i) { return 0; }