diff --git a/libc/kernel/uapi/scsi/scsi_bsg_fc.h b/libc/kernel/uapi/scsi/scsi_bsg_fc.h
index 2647249..3836282 100644
--- a/libc/kernel/uapi/scsi/scsi_bsg_fc.h
+++ b/libc/kernel/uapi/scsi/scsi_bsg_fc.h
@@ -69,7 +69,7 @@
   __u32 vendor_cmd[];
 };
 struct fc_bsg_host_vendor_reply {
-  __u32 vendor_rsp[0];
+  __DECLARE_FLEX_ARRAY(__u32, vendor_rsp);
 };
 struct fc_bsg_rport_els {
   __u8 els_code;
diff --git a/libc/kernel/uapi/scsi/scsi_bsg_mpi3mr.h b/libc/kernel/uapi/scsi/scsi_bsg_mpi3mr.h
index fcba8cd..48e88d3 100644
--- a/libc/kernel/uapi/scsi/scsi_bsg_mpi3mr.h
+++ b/libc/kernel/uapi/scsi/scsi_bsg_mpi3mr.h
@@ -220,9 +220,6 @@
     struct mpi3mr_bsg_mptcmd mptcmd;
   } cmd;
 };
-#ifndef MPI3_NVME_ENCAP_CMD_MAX
-#define MPI3_NVME_ENCAP_CMD_MAX (1)
-#endif
 struct mpi3_nvme_encapsulated_request {
   __le16 host_tag;
   __u8 ioc_use_only02;
@@ -236,7 +233,7 @@
   __le16 flags;
   __le32 data_length;
   __le32 reserved14[3];
-  __le32 command[MPI3_NVME_ENCAP_CMD_MAX];
+  __le32 command[];
 };
 struct mpi3_nvme_encapsulated_error_reply {
   __le16 host_tag;
diff --git a/libc/kernel/uapi/scsi/scsi_bsg_ufs.h b/libc/kernel/uapi/scsi/scsi_bsg_ufs.h
index ae5c757..036243e 100644
--- a/libc/kernel/uapi/scsi/scsi_bsg_ufs.h
+++ b/libc/kernel/uapi/scsi/scsi_bsg_ufs.h
@@ -20,8 +20,22 @@
 #define SCSI_BSG_UFS_H
 #include <linux/types.h>
 #define UFS_CDB_SIZE 16
-#define UPIU_TRANSACTION_UIC_CMD 0x1F
 #define UIC_CMD_SIZE (sizeof(__u32) * 4)
+enum ufs_bsg_msg_code {
+  UPIU_TRANSACTION_UIC_CMD = 0x1F,
+  UPIU_TRANSACTION_ARPMB_CMD,
+};
+enum ufs_rpmb_op_type {
+  UFS_RPMB_WRITE_KEY = 0x01,
+  UFS_RPMB_READ_CNT = 0x02,
+  UFS_RPMB_WRITE = 0x03,
+  UFS_RPMB_READ = 0x04,
+  UFS_RPMB_READ_RESP = 0x05,
+  UFS_RPMB_SEC_CONF_WRITE = 0x06,
+  UFS_RPMB_SEC_CONF_READ = 0x07,
+  UFS_RPMB_PURGE_ENABLE = 0x08,
+  UFS_RPMB_PURGE_STATUS_READ = 0x09,
+};
 struct utp_upiu_header {
   __be32 dword_0;
   __be32 dword_1;
@@ -49,13 +63,36 @@
     struct utp_upiu_query uc;
   };
 };
+struct ufs_arpmb_meta {
+  __be16 req_resp_type;
+  __u8 nonce[16];
+  __be32 write_counter;
+  __be16 addr_lun;
+  __be16 block_count;
+  __be16 result;
+} __attribute__((__packed__));
+struct ufs_ehs {
+  __u8 length;
+  __u8 ehs_type;
+  __be16 ehssub_type;
+  struct ufs_arpmb_meta meta;
+  __u8 mac_key[32];
+} __attribute__((__packed__));
 struct ufs_bsg_request {
   __u32 msgcode;
   struct utp_upiu_req upiu_req;
 };
 struct ufs_bsg_reply {
-  __u32 result;
+  int result;
   __u32 reply_payload_rcv_len;
   struct utp_upiu_req upiu_rsp;
 };
+struct ufs_rpmb_request {
+  struct ufs_bsg_request bsg_request;
+  struct ufs_ehs ehs_req;
+};
+struct ufs_rpmb_reply {
+  struct ufs_bsg_reply bsg_reply;
+  struct ufs_ehs ehs_rsp;
+};
 #endif