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
|
/*
* bl-device-discovery.h
*
* Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@emc.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef BL_DEVICE_DISCOVERY_H
#define BL_DEVICE_DISCOVERY_H
#include <stdint.h>
enum blk_vol_type {
BLOCK_VOLUME_SIMPLE = 0, /* maps to a single LU */
BLOCK_VOLUME_SLICE = 1, /* slice of another volume */
BLOCK_VOLUME_CONCAT = 2, /* concatenation of multiple volumes */
BLOCK_VOLUME_STRIPE = 3, /* striped across multiple volumes */
BLOCK_VOLUME_PSEUDO = 4,
};
/* All disk offset/lengths are stored in 512-byte sectors */
struct bl_volume {
uint32_t bv_type;
off_t bv_size;
struct bl_volume **bv_vols;
int bv_vol_n;
union {
dev_t bv_dev; /* for BLOCK_VOLUME_SIMPLE(PSEUDO) */
off_t bv_stripe_unit; /* for BLOCK_VOLUME_STRIPE(CONCAT) */
off_t bv_offset; /* for BLOCK_VOLUME_SLICE */
} param;
};
struct bl_sig_comp {
int64_t bs_offset; /* In bytes */
uint32_t bs_length; /* In bytes */
char *bs_string;
};
/* Maximum number of signatures components in a simple volume */
# define BLOCK_MAX_SIG_COMP 16
struct bl_sig {
int si_num_comps;
struct bl_sig_comp si_comps[BLOCK_MAX_SIG_COMP];
};
/*
* Multipath support: ACTIVE or PSEUDO device is valid,
* PASSIVE is a standby for ACTIVE.
*/
enum bl_path_state_e {
BL_PATH_STATE_PASSIVE = 1,
BL_PATH_STATE_ACTIVE = 2,
BL_PATH_STATE_PSEUDO = 3,
};
struct bl_serial {
int len;
char *data;
};
struct bl_disk_path {
struct bl_disk_path *next;
char *full_path;
enum bl_path_state_e state;
};
struct bl_disk {
struct bl_disk *next;
struct bl_serial *serial;
dev_t dev;
off_t size; /* in 512-byte sectors */
struct bl_disk_path *valid_path;
struct bl_disk_path *paths;
};
struct bl_dev_id {
unsigned char type;
unsigned char ids;
unsigned char reserve;
unsigned char len;
char data[0];
};
struct bl_dev_msg {
int status;
uint32_t major, minor;
};
struct bl_pipemsg_hdr {
uint8_t type;
uint16_t totallen; /* length of message excluding hdr */
};
#define BL_DEVICE_UMOUNT 0x0 /* Umount--delete devices */
#define BL_DEVICE_MOUNT 0x1 /* Mount--create devices */
#define BL_DEVICE_REQUEST_INIT 0x0 /* Start request */
#define BL_DEVICE_REQUEST_PROC 0x1 /* User process succeeds */
#define BL_DEVICE_REQUEST_ERR 0x2 /* User process fails */
uint32_t *blk_overflow(uint32_t * p, uint32_t * end, size_t nbytes);
#define BLK_READBUF(p, e, nbytes) do { \
p = blk_overflow(p, e, nbytes); \
if (!p) {\
goto out_err;\
} \
} while (0)
#define READ32(x) (x) = ntohl(*p++)
#define READ64(x) do { \
(x) = (uint64_t)ntohl(*p++) << 32; \
(x) |= ntohl(*p++); \
} while (0)
#define READ_SECTOR(x) do { \
READ64(tmp); \
if (tmp & 0x1ff) { \
goto out_err; \
} \
(x) = tmp >> 9; \
} while (0)
extern struct bl_disk *visible_disk_list;
uint64_t dm_device_create(struct bl_volume *vols, int num_vols);
int dm_device_remove_all(uint64_t *dev);
uint64_t process_deviceinfo(const char *dev_addr_buf,
unsigned int dev_addr_len,
uint32_t *major, uint32_t *minor);
extern ssize_t atomicio(ssize_t(*f) (int, void *, size_t),
int fd, void *_s, size_t n);
extern struct bl_serial *bldev_read_serial(int fd, const char *filename);
extern enum bl_path_state_e bldev_read_ap_state(int fd);
extern int bl_discover_devices(void);
#define BL_LOG_INFO(fmt...) syslog(LOG_INFO, fmt)
#define BL_LOG_WARNING(fmt...) syslog(LOG_WARNING, fmt)
#define BL_LOG_ERR(fmt...) syslog(LOG_ERR, fmt)
#define BL_LOG_DEBUG(fmt...) syslog(LOG_DEBUG, fmt)
#endif
|
