[lustre-devel] [PATCH 21/41] lustre: sec: file ioctls to handle encryption policies

[James Simmons <jsimmons@infradead.org>]

From: Sebastien Buisson <sbuisson@ddn.com>

Introduce support for fscrypt IOCTLs that handle encryption
policies v2. It enables setting/getting encryption policies on
individual directories, letting users decide how they want to
encrypt specific directories. Add file IOCTls this time.

fscrypt encryption policies v2 are supported from Linux 5.4.

Fixes: b8b71993 ("lustre: sec: ioctls to handle encryption policies")
WC-bug-id: https://jira.whamcloud.com/browse/LU-12275
Lustre-commit: 3973cf8dc955c77 ("LU-12275 sec: ioctls to handle encryption policies")
Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-on: https://review.whamcloud.com/37673
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: John L. Hammond <jhammond@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
 fs/lustre/llite/file.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/fs/lustre/llite/file.c b/fs/lustre/llite/file.c
index fd01e14..60b6ac4 100644
--- a/fs/lustre/llite/file.c
+++ b/fs/lustre/llite/file.c
@@ -3989,6 +3989,33 @@ static int ll_heat_set(struct inode *inode, enum lu_heat_flag flags)
 		kfree(state);
 		return rc;
 	}
+#ifdef CONFIG_FS_ENCRYPTION
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+		if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
+			return -EOPNOTSUPP;
+		return llcrypt_ioctl_set_policy(file, (const void __user *)arg);
+	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
+		if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
+			return -EOPNOTSUPP;
+		return llcrypt_ioctl_get_policy_ex(file, (void __user *)arg);
+	case FS_IOC_ADD_ENCRYPTION_KEY:
+		if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
+			return -EOPNOTSUPP;
+		return llcrypt_ioctl_add_key(file, (void __user *)arg);
+	case FS_IOC_REMOVE_ENCRYPTION_KEY:
+		if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
+			return -EOPNOTSUPP;
+		return llcrypt_ioctl_remove_key(file, (void __user *)arg);
+	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
+		if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
+			return -EOPNOTSUPP;
+		return llcrypt_ioctl_remove_key_all_users(file,
+							  (void __user *)arg);
+	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
+		if (!ll_sbi_has_encrypt(ll_i2sbi(inode)))
+			return -EOPNOTSUPP;
+		return llcrypt_ioctl_get_key_status(file, (void __user *)arg);
+#endif
 	default:
 		return obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL,
 				     (void __user *)arg);
-- 
1.8.3.1

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