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Revert "ANDROID: fscrypt: add key removal notifier chain"

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This reverts commit 98261f39e992543a404353ba2d8f36cb739f329f
because it was only needed for sdcardfs, which has now been removed.

Bug: 157700134
Bug: 142275883
Change-Id: Iaf22521ef47d48ce9c9c0604a8b2412e3b8c1faa
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers 2020-06-29 09:15:36 -07:00
parent e27f561fd1
commit 4da740c10d
2 changed files with 0 additions and 36 deletions
fs/crypto
keyring.c
include/linux
fscrypt.h

22
fs/crypto/keyring.c
View file

@ -867,34 +867,12 @@ static int check_for_busy_inodes(struct super_block *sb,
return -EBUSY;
}
static BLOCKING_NOTIFIER_HEAD(fscrypt_key_removal_notifiers);
/*
* Register a function to be executed when the FS_IOC_REMOVE_ENCRYPTION_KEY
* ioctl has removed a key and is about to try evicting inodes.
*/
int fscrypt_register_key_removal_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_register(&fscrypt_key_removal_notifiers,
nb);
}
EXPORT_SYMBOL_GPL(fscrypt_register_key_removal_notifier);
int fscrypt_unregister_key_removal_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(&fscrypt_key_removal_notifiers,
nb);
}
EXPORT_SYMBOL_GPL(fscrypt_unregister_key_removal_notifier);
static int try_to_lock_encrypted_files(struct super_block *sb,
struct fscrypt_master_key *mk)
{
int err1;
int err2;
blocking_notifier_call_chain(&fscrypt_key_removal_notifiers, 0, NULL);
/*
* An inode can't be evicted while it is dirty or has dirty pages.
* Thus, we first have to clean the inodes in ->mk_decrypted_inodes.

14
include/linux/fscrypt.h
View file

@ -178,8 +178,6 @@ int fscrypt_ioctl_add_key(struct file *filp, void __user *arg);
int fscrypt_ioctl_remove_key(struct file *filp, void __user *arg);
int fscrypt_ioctl_remove_key_all_users(struct file *filp, void __user *arg);
int fscrypt_ioctl_get_key_status(struct file *filp, void __user *arg);
int fscrypt_register_key_removal_notifier(struct notifier_block *nb);
int fscrypt_unregister_key_removal_notifier(struct notifier_block *nb);
/* keysetup.c */
int fscrypt_get_encryption_info(struct inode *inode);
@ -382,18 +380,6 @@ static inline int fscrypt_ioctl_get_key_status(struct file *filp,
return -EOPNOTSUPP;
}
static inline int fscrypt_register_key_removal_notifier(
struct notifier_block *nb)
{
return 0;
}
static inline int fscrypt_unregister_key_removal_notifier(
struct notifier_block *nb)
{
return 0;
}
/* keysetup.c */
static inline int fscrypt_get_encryption_info(struct inode *inode)
{