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Various cleanups for the file system encryption feature.

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Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/fscrypt

Pull fscrypt updates from Ted Ts'o:
 "Various cleanups for the file system encryption feature"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/fscrypt:
  fscrypt: constify struct fscrypt_operations
  fscrypt: properly declare on-stack completion
  fscrypt: split supp and notsupp declarations into their own headers
  fscrypt: remove redundant assignment of res
  fscrypt: make fscrypt_operations.key_prefix a string
  fscrypt: remove unused 'mode' member of fscrypt_ctx
  ext4: don't allow encrypted operations without keys
  fscrypt: make test_dummy_encryption require a keyring key
  fscrypt: factor out bio specific functions
  fscrypt: pass up error codes from ->get_context()
  fscrypt: remove user-triggerable warning messages
  fscrypt: use EEXIST when file already uses different policy
  fscrypt: use ENOTDIR when setting encryption policy on nondirectory
  fscrypt: use ENOKEY when file cannot be created w/o key
This commit is contained in:
Linus Torvalds 2017-02-20 18:22:31 -08:00
commit 6c24337f22
25 changed files with 659 additions and 722 deletions
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13
fs/ubifs/crypto.c
View file

@ -26,15 +26,6 @@ static unsigned int ubifs_crypt_max_namelen(struct inode *inode)
return UBIFS_MAX_NLEN;
}
static int ubifs_key_prefix(struct inode *inode, u8 **key)
{
static char prefix[] = "ubifs:";
*key = prefix;
return sizeof(prefix) - 1;
}
int ubifs_encrypt(const struct inode *inode, struct ubifs_data_node *dn,
unsigned int in_len, unsigned int *out_len, int block)
{
@ -86,12 +77,12 @@ int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
return 0;
}
struct fscrypt_operations ubifs_crypt_operations = {
const struct fscrypt_operations ubifs_crypt_operations = {
.flags = FS_CFLG_OWN_PAGES,
.key_prefix = "ubifs:",
.get_context = ubifs_crypt_get_context,
.set_context = ubifs_crypt_set_context,
.is_encrypted = __ubifs_crypt_is_encrypted,
.empty_dir = ubifs_crypt_empty_dir,
.max_namelen = ubifs_crypt_max_namelen,
.key_prefix = ubifs_key_prefix,
};

2
fs/ubifs/super.c
View file

@ -2000,7 +2000,7 @@ static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
}
#ifndef CONFIG_UBIFS_FS_ENCRYPTION
struct fscrypt_operations ubifs_crypt_operations = {
const struct fscrypt_operations ubifs_crypt_operations = {
.is_encrypted = __ubifs_crypt_is_encrypted,
};
#endif

30
fs/ubifs/ubifs.h
View file

@ -38,7 +38,11 @@
#include <linux/backing-dev.h>
#include <linux/security.h>
#include <linux/xattr.h>
#include <linux/fscrypto.h>
#ifdef CONFIG_UBIFS_FS_ENCRYPTION
#include <linux/fscrypt_supp.h>
#else
#include <linux/fscrypt_notsupp.h>
#endif
#include <linux/random.h>
#include "ubifs-media.h"
@ -1797,28 +1801,6 @@ int ubifs_decompress(const struct ubifs_info *c, const void *buf, int len,
#include "key.h"
#ifndef CONFIG_UBIFS_FS_ENCRYPTION
#define fscrypt_set_d_op(i)
#define fscrypt_get_ctx fscrypt_notsupp_get_ctx
#define fscrypt_release_ctx fscrypt_notsupp_release_ctx
#define fscrypt_encrypt_page fscrypt_notsupp_encrypt_page
#define fscrypt_decrypt_page fscrypt_notsupp_decrypt_page
#define fscrypt_decrypt_bio_pages fscrypt_notsupp_decrypt_bio_pages
#define fscrypt_pullback_bio_page fscrypt_notsupp_pullback_bio_page
#define fscrypt_restore_control_page fscrypt_notsupp_restore_control_page
#define fscrypt_zeroout_range fscrypt_notsupp_zeroout_range
#define fscrypt_ioctl_set_policy fscrypt_notsupp_ioctl_set_policy
#define fscrypt_ioctl_get_policy fscrypt_notsupp_ioctl_get_policy
#define fscrypt_has_permitted_context fscrypt_notsupp_has_permitted_context
#define fscrypt_inherit_context fscrypt_notsupp_inherit_context
#define fscrypt_get_encryption_info fscrypt_notsupp_get_encryption_info
#define fscrypt_put_encryption_info fscrypt_notsupp_put_encryption_info
#define fscrypt_setup_filename fscrypt_notsupp_setup_filename
#define fscrypt_free_filename fscrypt_notsupp_free_filename
#define fscrypt_fname_encrypted_size fscrypt_notsupp_fname_encrypted_size
#define fscrypt_fname_alloc_buffer fscrypt_notsupp_fname_alloc_buffer
#define fscrypt_fname_free_buffer fscrypt_notsupp_fname_free_buffer
#define fscrypt_fname_disk_to_usr fscrypt_notsupp_fname_disk_to_usr
#define fscrypt_fname_usr_to_disk fscrypt_notsupp_fname_usr_to_disk
static inline int ubifs_encrypt(const struct inode *inode,
struct ubifs_data_node *dn,
unsigned int in_len, unsigned int *out_len,
@ -1842,7 +1824,7 @@ int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
unsigned int *out_len, int block);
#endif
extern struct fscrypt_operations ubifs_crypt_operations;
extern const struct fscrypt_operations ubifs_crypt_operations;
static inline bool __ubifs_crypt_is_encrypted(struct inode *inode)
{