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Commit 4da740c1 authored by Eric Biggers's avatar Eric Biggers
Browse files

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



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: default avatarEric Biggers <ebiggers@google.com>
parent e27f561f

fs/crypto/keyring.c

+0 −22
Original line number Diff line number Diff line
@@ -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.

include/linux/fscrypt.h

+0 −14
Original line number Diff line number Diff line
@@ -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)

{