diff options
| author | David Gstir <david@sigma-star.at> | 2016-12-06 23:53:57 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-12-11 16:33:11 -0500 |
| commit | f32d7ac20a5864483c1f96e4970daa083e18bfd1 (patch) | |
| tree | f381a5707d80076055bb23c14a5a2c134f3ae7df | |
| parent | bd7b8290388dd58a8c0a3710b171e58ef952ca4d (diff) | |
fscrypt: Delay bounce page pool allocation until needed
Since fscrypt users can now indicated if fscrypt_encrypt_page() should
use a bounce page, we can delay the bounce page pool initialization util
it is really needed. That is until fscrypt_operations has no
FS_CFLG_OWN_PAGES flag set.
Signed-off-by: David Gstir <david@sigma-star.at>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/crypto/crypto.c | 9 | ||||
| -rw-r--r-- | fs/crypto/fscrypt_private.h | 2 | ||||
| -rw-r--r-- | fs/crypto/keyinfo.c | 2 | ||||
| -rw-r--r-- | include/linux/fscrypto.h | 1 |
4 files changed, 9 insertions, 5 deletions
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index 5ffc59436397..bc1d4781b9ec 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -525,17 +525,22 @@ static void fscrypt_destroy(void) /** * fscrypt_initialize() - allocate major buffers for fs encryption. + * @cop_flags: fscrypt operations flags * * We only call this when we start accessing encrypted files, since it * results in memory getting allocated that wouldn't otherwise be used. * * Return: Zero on success, non-zero otherwise. */ -int fscrypt_initialize(void) +int fscrypt_initialize(unsigned int cop_flags) { int i, res = -ENOMEM; - if (fscrypt_bounce_page_pool) + /* + * No need to allocate a bounce page pool if there already is one or + * this FS won't use it. + */ + if (cop_flags & FS_CFLG_OWN_PAGES || fscrypt_bounce_page_pool) return 0; mutex_lock(&fscrypt_init_mutex); diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index c98b2a7fb6d3..7ba10cd45a2e 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -85,7 +85,7 @@ struct fscrypt_completion_result { /* crypto.c */ -int fscrypt_initialize(void); +int fscrypt_initialize(unsigned int cop_flags); /* keyinfo.c */ extern int fscrypt_get_crypt_info(struct inode *); diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c index 35d3317a27b3..6eeea1dcba41 100644 --- a/fs/crypto/keyinfo.c +++ b/fs/crypto/keyinfo.c @@ -188,7 +188,7 @@ int fscrypt_get_crypt_info(struct inode *inode) u8 *raw_key = NULL; int res; - res = fscrypt_initialize(); + res = fscrypt_initialize(inode->i_sb->s_cop->flags); if (res) return res; diff --git a/include/linux/fscrypto.h b/include/linux/fscrypto.h index 188b4fa59cbf..1adc1c758d31 100644 --- a/include/linux/fscrypto.h +++ b/include/linux/fscrypto.h @@ -168,7 +168,6 @@ static inline void fscrypt_set_d_op(struct dentry *dentry) #if IS_ENABLED(CONFIG_FS_ENCRYPTION) /* crypto.c */ extern struct kmem_cache *fscrypt_info_cachep; - extern struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *, gfp_t); extern void fscrypt_release_ctx(struct fscrypt_ctx *); extern struct page *fscrypt_encrypt_page(const struct inode *, struct page *, |