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ubifs: wire up new fscrypt ioctls 

Wire up the new ioctls for adding and removing fscrypt keys to/from the
filesystem, and the new ioctl for retrieving v2 encryption policies.

The key removal ioctls also required making UBIFS use
fscrypt_drop_inode().

For more details see Documentation/filesystems/fscrypt.rst and the
fscrypt patches that added the implementation of these ioctls.

Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers 2019-08-04 19:35:49 -07:00
parent 8ce589c773
commit 62de25927a
2 changed files with 31 additions and 0 deletions
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20
fs/ubifs/ioctl.c
View File

@ -185,6 +185,21 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case FS_IOC_GET_ENCRYPTION_POLICY:
return fscrypt_ioctl_get_policy(file, (void __user *)arg);
case FS_IOC_GET_ENCRYPTION_POLICY_EX:
return fscrypt_ioctl_get_policy_ex(file, (void __user *)arg);
case FS_IOC_ADD_ENCRYPTION_KEY:
return fscrypt_ioctl_add_key(file, (void __user *)arg);
case FS_IOC_REMOVE_ENCRYPTION_KEY:
return fscrypt_ioctl_remove_key(file, (void __user *)arg);
case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
return fscrypt_ioctl_remove_key_all_users(file,
(void __user *)arg);
case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
return fscrypt_ioctl_get_key_status(file, (void __user *)arg);
default:
return -ENOTTY;
}
@ -202,6 +217,11 @@ long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
break;
case FS_IOC_SET_ENCRYPTION_POLICY:
case FS_IOC_GET_ENCRYPTION_POLICY:
case FS_IOC_GET_ENCRYPTION_POLICY_EX:
case FS_IOC_ADD_ENCRYPTION_KEY:
case FS_IOC_REMOVE_ENCRYPTION_KEY:
case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
break;
default:
return -ENOIOCTLCMD;

11
fs/ubifs/super.c
View File

@ -318,6 +318,16 @@ static int ubifs_write_inode(struct inode *inode, struct writeback_control *wbc)
return err;
}
static int ubifs_drop_inode(struct inode *inode)
{
int drop = generic_drop_inode(inode);
if (!drop)
drop = fscrypt_drop_inode(inode);
return drop;
}
static void ubifs_evict_inode(struct inode *inode)
{
int err;
@ -1990,6 +2000,7 @@ const struct super_operations ubifs_super_operations = {
.free_inode = ubifs_free_inode,
.put_super = ubifs_put_super,
.write_inode = ubifs_write_inode,
.drop_inode = ubifs_drop_inode,
.evict_inode = ubifs_evict_inode,
.statfs = ubifs_statfs,
.dirty_inode = ubifs_dirty_inode,