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fscrypt: lots of cleanups, mostly courtesy by Eric Biggers

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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:
 "Lots of cleanups, mostly courtesy by Eric Biggers"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/fscrypt:
  fscrypt: lock mutex before checking for bounce page pool
  fscrypt: add a documentation file for filesystem-level encryption
  ext4: switch to fscrypt_prepare_setattr()
  ext4: switch to fscrypt_prepare_lookup()
  ext4: switch to fscrypt_prepare_rename()
  ext4: switch to fscrypt_prepare_link()
  ext4: switch to fscrypt_file_open()
  fscrypt: new helper function - fscrypt_prepare_setattr()
  fscrypt: new helper function - fscrypt_prepare_lookup()
  fscrypt: new helper function - fscrypt_prepare_rename()
  fscrypt: new helper function - fscrypt_prepare_link()
  fscrypt: new helper function - fscrypt_file_open()
  fscrypt: new helper function - fscrypt_require_key()
  fscrypt: remove unneeded empty fscrypt_operations structs
  fscrypt: remove ->is_encrypted()
  fscrypt: switch from ->is_encrypted() to IS_ENCRYPTED()
  fs, fscrypt: add an S_ENCRYPTED inode flag
  fscrypt: clean up include file mess
This commit is contained in:
Linus Torvalds 2017-11-14 11:35:15 -08:00
commit 32190f0afb
28 changed files with 1155 additions and 279 deletions
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1
fs/ubifs/crypto.c
View file

@ -88,7 +88,6 @@ const struct fscrypt_operations ubifs_crypt_operations = {
.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,
};

5
fs/ubifs/ioctl.c
View file

@ -38,7 +38,8 @@ void ubifs_set_inode_flags(struct inode *inode)
{
unsigned int flags = ubifs_inode(inode)->flags;
inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_DIRSYNC);
inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_DIRSYNC |
S_ENCRYPTED);
if (flags & UBIFS_SYNC_FL)
inode->i_flags |= S_SYNC;
if (flags & UBIFS_APPEND_FL)
@ -47,6 +48,8 @@ void ubifs_set_inode_flags(struct inode *inode)
inode->i_flags |= S_IMMUTABLE;
if (flags & UBIFS_DIRSYNC_FL)
inode->i_flags |= S_DIRSYNC;
if (flags & UBIFS_CRYPT_FL)
inode->i_flags |= S_ENCRYPTED;
}
/*

8
fs/ubifs/super.c
View file

@ -2007,12 +2007,6 @@ static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
return c;
}
#ifndef CONFIG_UBIFS_FS_ENCRYPTION
const struct fscrypt_operations ubifs_crypt_operations = {
.is_encrypted = __ubifs_crypt_is_encrypted,
};
#endif
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ubifs_info *c = sb->s_fs_info;
@ -2055,7 +2049,9 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
sb->s_op = &ubifs_super_operations;
sb->s_xattr = ubifs_xattr_handlers;
#ifdef CONFIG_UBIFS_FS_ENCRYPTION
sb->s_cop = &ubifs_crypt_operations;
#endif
mutex_lock(&c->umount_mutex);
err = mount_ubifs(c);

20
fs/ubifs/ubifs.h
View file

@ -38,12 +38,11 @@
#include <linux/backing-dev.h>
#include <linux/security.h>
#include <linux/xattr.h>
#ifdef CONFIG_UBIFS_FS_ENCRYPTION
#include <linux/fscrypt_supp.h>
#else
#include <linux/fscrypt_notsupp.h>
#endif
#include <linux/random.h>
#define __FS_HAS_ENCRYPTION IS_ENABLED(CONFIG_UBIFS_FS_ENCRYPTION)
#include <linux/fscrypt.h>
#include "ubifs-media.h"
/* Version of this UBIFS implementation */
@ -1835,16 +1834,11 @@ int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
extern const struct fscrypt_operations ubifs_crypt_operations;
static inline bool __ubifs_crypt_is_encrypted(struct inode *inode)
{
struct ubifs_inode *ui = ubifs_inode(inode);
return ui->flags & UBIFS_CRYPT_FL;
}
static inline bool ubifs_crypt_is_encrypted(const struct inode *inode)
{
return __ubifs_crypt_is_encrypted((struct inode *)inode);
const struct ubifs_inode *ui = ubifs_inode(inode);
return ui->flags & UBIFS_CRYPT_FL;
}
/* Normal UBIFS messages */

1
fs/ubifs/xattr.c
View file

@ -170,6 +170,7 @@ static int create_xattr(struct ubifs_info *c, struct inode *host,
err = ubifs_jnl_update(c, host, nm, inode, 0, 1);
if (err)
goto out_cancel;
ubifs_set_inode_flags(host);
mutex_unlock(&host_ui->ui_mutex);
ubifs_release_budget(c, &req);