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scsi
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scsi_netlink.h
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/* * SCSI Transport Netlink Interface * Used for the posting of outbound SCSI transport events * * Copyright (C) 2006 James Smart, Emulex Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #ifndef SCSI_NETLINK_H #define SCSI_NETLINK_H #include <linux/netlink.h> #include <linux/types.h> /* * This file intended to be included by both kernel and user space */ /* Single Netlink Message type to send all SCSI Transport messages */ #define SCSI_TRANSPORT_MSG NLMSG_MIN_TYPE + 1 /* SCSI Transport Broadcast Groups */ /* leaving groups 0 and 1 unassigned */ #define SCSI_NL_GRP_FC_EVENTS (1<<2) /* Group 2 */ #define SCSI_NL_GRP_CNT 3 /* SCSI_TRANSPORT_MSG event message header */ struct scsi_nl_hdr { uint8_t version; uint8_t transport; uint16_t magic; uint16_t msgtype; uint16_t msglen; } __attribute__((aligned(sizeof(uint64_t)))); /* scsi_nl_hdr->version value */ #define SCSI_NL_VERSION 1 /* scsi_nl_hdr->magic value */ #define SCSI_NL_MAGIC 0xA1B2 /* scsi_nl_hdr->transport value */ #define SCSI_NL_TRANSPORT 0 #define SCSI_NL_TRANSPORT_FC 1 #define SCSI_NL_MAX_TRANSPORTS 2 /* Transport-based scsi_nl_hdr->msgtype values are defined in each transport */ /* * GENERIC SCSI scsi_nl_hdr->msgtype Values */ /* kernel -> user */ #define SCSI_NL_SHOST_VENDOR 0x0001 /* user -> kernel */ /* SCSI_NL_SHOST_VENDOR msgtype is kernel->user and user->kernel */ /* * Message Structures : */ /* macro to round up message lengths to 8byte boundary */ #define SCSI_NL_MSGALIGN(len) (((len) + 7) & ~7) /* * SCSI HOST Vendor Unique messages : * SCSI_NL_SHOST_VENDOR * * Note: The Vendor Unique message payload will begin directly after * this structure, with the length of the payload per vmsg_datalen. * * Note: When specifying vendor_id, be sure to read the Vendor Type and ID * formatting requirements specified below */ struct scsi_nl_host_vendor_msg { struct scsi_nl_hdr snlh; /* must be 1st element ! */ uint64_t vendor_id; uint16_t host_no; uint16_t vmsg_datalen; } __attribute__((aligned(sizeof(uint64_t)))); /* * Vendor ID: * If transports post vendor-unique events, they must pass a well-known * 32-bit vendor identifier. This identifier consists of 8 bits indicating * the "type" of identifier contained, and 24 bits of id data. * * Identifiers for each type: * PCI : ID data is the 16 bit PCI Registered Vendor ID */ #define SCSI_NL_VID_TYPE_SHIFT 56 #define SCSI_NL_VID_TYPE_MASK ((__u64)0xFF << SCSI_NL_VID_TYPE_SHIFT) #define SCSI_NL_VID_TYPE_PCI ((__u64)0x01 << SCSI_NL_VID_TYPE_SHIFT) #define SCSI_NL_VID_ID_MASK (~ SCSI_NL_VID_TYPE_MASK) #define INIT_SCSI_NL_HDR(hdr, t, mtype, mlen) \ { \ (hdr)->version = SCSI_NL_VERSION; \ (hdr)->transport = t; \ (hdr)->magic = SCSI_NL_MAGIC; \ (hdr)->msgtype = mtype; \ (hdr)->msglen = mlen; \ } #endif /* SCSI_NETLINK_H */