1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* 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>
/*
* 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; \
}
#ifdef __KERNEL__
#include <scsi/scsi_host.h>
/* Exported Kernel Interfaces */
int scsi_nl_add_transport(u8 tport,
int (*msg_handler)(struct sk_buff *),
void (*event_handler)(struct notifier_block *, unsigned long, void *));
void scsi_nl_remove_transport(u8 tport);
int scsi_nl_add_driver(u64 vendor_id, struct scsi_host_template *hostt,
int (*nlmsg_handler)(struct Scsi_Host *shost, void *payload,
u32 len, u32 pid),
void (*nlevt_handler)(struct notifier_block *nb,
unsigned long event, void *notify_ptr));
void scsi_nl_remove_driver(u64 vendor_id);
void scsi_nl_send_transport_msg(u32 pid, struct scsi_nl_hdr *hdr);
int scsi_nl_send_vendor_msg(u32 pid, unsigned short host_no, u64 vendor_id,
char *data_buf, u32 data_len);
#endif /* __KERNEL__ */
#endif /* SCSI_NETLINK_H */
|
