Hi Eric,
On 2019/7/27 6:41, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> Wire up the new ioctls for adding and removing fscrypt keys to/from the
> filesystem, and the new ioctl for retrieving v2 encryption policies.
>
> FS_IOC_REMOVE_ENCRYPTION_KEY also required making f2fs_drop_inode() call
> fscrypt_drop_inode().
>
> For more details see Documentation/filesystems/fscrypt.rst and the
> fscrypt patches that added the implementation of these ioctls.
>
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>
BTW, do you think it needs to make xxfs_has_support_encrypt() function be a
common interface defined in struct fscrypt_operations, as I see all
fscrypt_ioctl_*() needs to check with it, tho such cleanup is minor...
Thanks,
> ---
> fs/f2fs/file.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
> fs/f2fs/super.c | 2 ++
> 2 files changed, 48 insertions(+)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index f8d46df8fa9ee..d81dda290b829 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -2184,6 +2184,40 @@ static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
> return err;
> }
>
> +static int f2fs_ioc_get_encryption_policy_ex(struct file *filp,
> + unsigned long arg)
> +{
> + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
> + return -EOPNOTSUPP;
> +
> + return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
> +}
> +
> +static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg)
> +{
> + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
> + return -EOPNOTSUPP;
> +
> + return fscrypt_ioctl_add_key(filp, (void __user *)arg);
> +}
> +
> +static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg)
> +{
> + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
> + return -EOPNOTSUPP;
> +
> + return fscrypt_ioctl_remove_key(filp, (const void __user *)arg);
> +}
> +
> +static int f2fs_ioc_get_encryption_key_status(struct file *filp,
> + unsigned long arg)
> +{
> + if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
> + return -EOPNOTSUPP;
> +
> + return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
> +}
> +
> static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
> {
> struct inode *inode = file_inode(filp);
> @@ -3109,6 +3143,14 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> return f2fs_ioc_get_encryption_policy(filp, arg);
> case F2FS_IOC_GET_ENCRYPTION_PWSALT:
> return f2fs_ioc_get_encryption_pwsalt(filp, arg);
> + case FS_IOC_GET_ENCRYPTION_POLICY_EX:
> + return f2fs_ioc_get_encryption_policy_ex(filp, arg);
> + case FS_IOC_ADD_ENCRYPTION_KEY:
> + return f2fs_ioc_add_encryption_key(filp, arg);
> + case FS_IOC_REMOVE_ENCRYPTION_KEY:
> + return f2fs_ioc_remove_encryption_key(filp, arg);
> + case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
> + return f2fs_ioc_get_encryption_key_status(filp, arg);
> case F2FS_IOC_GARBAGE_COLLECT:
> return f2fs_ioc_gc(filp, arg);
> case F2FS_IOC_GARBAGE_COLLECT_RANGE:
> @@ -3236,6 +3278,10 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> case F2FS_IOC_SET_ENCRYPTION_POLICY:
> case F2FS_IOC_GET_ENCRYPTION_PWSALT:
> case F2FS_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_GET_ENCRYPTION_KEY_STATUS:
> case F2FS_IOC_GARBAGE_COLLECT:
> case F2FS_IOC_GARBAGE_COLLECT_RANGE:
> case F2FS_IOC_WRITE_CHECKPOINT:
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 6de6cda440315..f5fae8d511a20 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -913,6 +913,8 @@ static int f2fs_drop_inode(struct inode *inode)
> return 0;
> }
> ret = generic_drop_inode(inode);
> + if (!ret)
> + ret = fscrypt_drop_inode(inode);
> trace_f2fs_drop_inode(inode, ret);
> return ret;
> }
>
