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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/*
* Copyright 2005 Network Appliance, Inc., All Rights Reserved
* Author: David Wysochanski available at davidw@netapp.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 v2 for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <assert.h>
#include <sg_include.h>
#include <debug.h>
#include <prio.h>
#define INQUIRY_CMD 0x12
#define INQUIRY_CMDLEN 6
#define DEFAULT_PRIOVAL 10
#define RESULTS_MAX 256
#define SG_TIMEOUT 30000
#define pp_netapp_log(prio, fmt, args...) \
condlog(prio, "%s: netapp prio: " fmt, dev, ##args)
static void dump_cdb(unsigned char *cdb, int size)
{
int i;
char buf[10*5+1];
char * p = &buf[0];
condlog(0, "- SCSI CDB: ");
for (i=0; i<size; i++) {
p += snprintf(p, 10*(size-i), "0x%02x ", cdb[i]);
}
condlog(0, "%s", buf);
}
static void process_sg_error(struct sg_io_hdr *io_hdr)
{
int i;
char buf[128*5+1];
char * p = &buf[0];
condlog(0, "- masked_status=0x%02x, host_status=0x%02x, "
"driver_status=0x%02x", io_hdr->masked_status,
io_hdr->host_status, io_hdr->driver_status);
if (io_hdr->sb_len_wr > 0) {
condlog(0, "- SCSI sense data: ");
for (i=0; i<io_hdr->sb_len_wr; i++) {
p += snprintf(p, 128*(io_hdr->sb_len_wr-i), "0x%02x ",
io_hdr->sbp[i]);
}
condlog(0, "%s", buf);
}
}
/*
* Returns:
* -1: error, errno set
* 0: success
*/
static int send_gva(const char *dev, int fd, unsigned char pg,
unsigned char *results, int *results_size)
{
unsigned char sb[128];
unsigned char cdb[10] = {0xc0, 0, 0x1, 0xa, 0x98, 0xa,
pg, sizeof(sb), 0, 0};
struct sg_io_hdr io_hdr;
int ret = -1;
memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof (cdb);
io_hdr.mx_sb_len = sizeof (sb);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = *results_size;
io_hdr.dxferp = results;
io_hdr.cmdp = cdb;
io_hdr.sbp = sb;
io_hdr.timeout = SG_TIMEOUT;
io_hdr.pack_id = 0;
if (ioctl(fd, SG_IO, &io_hdr) < 0) {
pp_netapp_log(0, "SG_IO ioctl failed, errno=%d", errno);
dump_cdb(cdb, sizeof(cdb));
goto out;
}
if (io_hdr.info & SG_INFO_OK_MASK) {
pp_netapp_log(0, "SCSI error");
dump_cdb(cdb, sizeof(cdb));
process_sg_error(&io_hdr);
goto out;
}
if (results[4] != 0x0a || results[5] != 0x98 ||
results[6] != 0x0a ||results[7] != 0x01) {
dump_cdb(cdb, sizeof(cdb));
pp_netapp_log(0, "GVA return wrong format ");
pp_netapp_log(0, "results[4-7] = 0x%02x 0x%02x 0x%02x 0x%02x",
results[4], results[5], results[6], results[7]);
goto out;
}
ret = 0;
out:
return(ret);
}
/*
* Retuns:
* -1: Unable to obtain proxy info
* 0: Device _not_ proxy path
* 1: Device _is_ proxy path
*/
static int get_proxy(const char *dev, int fd)
{
unsigned char results[256];
unsigned char sb[128];
unsigned char cdb[INQUIRY_CMDLEN] = {INQUIRY_CMD, 1, 0xc1, 0,
sizeof(sb), 0};
struct sg_io_hdr io_hdr;
int ret = -1;
memset(&results, 0, sizeof (results));
memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof (cdb);
io_hdr.mx_sb_len = sizeof (sb);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = sizeof (results);
io_hdr.dxferp = results;
io_hdr.cmdp = cdb;
io_hdr.sbp = sb;
io_hdr.timeout = SG_TIMEOUT;
io_hdr.pack_id = 0;
if (ioctl(fd, SG_IO, &io_hdr) < 0) {
pp_netapp_log(0, "ioctl sending inquiry command failed, "
"errno=%d", errno);
dump_cdb(cdb, sizeof(cdb));
goto out;
}
if (io_hdr.info & SG_INFO_OK_MASK) {
pp_netapp_log(0, "SCSI error");
dump_cdb(cdb, sizeof(cdb));
process_sg_error(&io_hdr);
goto out;
}
if (results[1] != 0xc1 || results[8] != 0x0a ||
results[9] != 0x98 || results[10] != 0x0a ||
results[11] != 0x0 || results[12] != 0xc1 ||
results[13] != 0x0) {
pp_netapp_log(0,"proxy info page in unknown format - ");
pp_netapp_log(0,"results[8-13]=0x%02x 0x%02x 0x%02x 0x%02x "
"0x%02x 0x%02x",
results[8], results[9], results[10],
results[11], results[12], results[13]);
dump_cdb(cdb, sizeof(cdb));
goto out;
}
ret = (results[19] & 0x02) >> 1;
out:
return(ret);
}
/*
* Returns priority of device based on device info.
*
* 4: FCP non-proxy, FCP proxy unknown, or unable to determine protocol
* 3: iSCSI HBA
* 2: iSCSI software
* 1: FCP proxy
*/
static int netapp_prio(const char *dev, int fd)
{
unsigned char results[RESULTS_MAX];
int results_size=RESULTS_MAX;
int rc;
int is_proxy;
int is_iscsi_software;
int is_iscsi_hardware;
int tot_len;
is_iscsi_software = is_iscsi_hardware = is_proxy = 0;
memset(&results, 0, sizeof (results));
rc = send_gva(dev, fd, 0x41, results, &results_size);
if (rc == 0) {
tot_len = results[0] << 24 | results[1] << 16 |
results[2] << 8 | results[3];
if (tot_len <= 8) {
goto try_fcp_proxy;
}
if (results[8] != 0x41) {
pp_netapp_log(0, "GVA page 0x41 error - "
"results[8] = 0x%x", results[8]);
goto try_fcp_proxy;
}
if ((strncmp((char *)&results[12], "ism_sw", 6) == 0) ||
(strncmp((char *)&results[12], "iswt", 4) == 0)) {
is_iscsi_software = 1;
goto prio_select;
}
else if (strncmp((char *)&results[12], "ism_sn", 6) == 0) {
is_iscsi_hardware = 1;
goto prio_select;
}
}
try_fcp_proxy:
rc = get_proxy(dev, fd);
if (rc >= 0) {
is_proxy = rc;
}
prio_select:
if (is_iscsi_hardware) {
return 3;
} else if (is_iscsi_software) {
return 2;
} else {
if (is_proxy) {
return 1;
} else {
/* Either non-proxy, or couldn't get proxy info */
return 4;
}
}
}
int getprio (struct path * pp, char * args)
{
return netapp_prio(pp->dev, pp->fd);
}
|
