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
|
/*
* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* 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 _CLVMD_H
#define _CLVMD_H
#define CLVMD_MAJOR_VERSION 0
#define CLVMD_MINOR_VERSION 2
#define CLVMD_PATCH_VERSION 1
/* Default time (in seconds) we will wait for all remote commands to execute
before declaring them dead */
#define DEFAULT_CMD_TIMEOUT 60
/* One of these for each reply we get from command execution on a node */
struct node_reply {
char node[MAX_CLUSTER_MEMBER_NAME_LEN];
char *replymsg;
int status;
struct node_reply *next;
};
typedef enum {DEBUG_OFF, DEBUG_STDERR, DEBUG_SYSLOG} debug_t;
/*
* These exist for the use of local sockets only when we are
* collecting responses from all cluster nodes
*/
struct localsock_bits {
struct node_reply *replies;
int num_replies;
int expected_replies;
time_t sent_time; /* So we can check for timeouts */
int in_progress; /* Only execute one cmd at a time per client */
int sent_out; /* Flag to indicate that a command was sent
to remote nodes */
void *private; /* Private area for command processor use */
void *cmd; /* Whole command as passed down local socket */
int cmd_len; /* Length of above */
int pipe; /* Pipe to send PRE completion status down */
int finished; /* Flag to tell subthread to exit */
int all_success; /* Set to 0 if any node (or the pre_command)
failed */
int cleanup_needed; /* helper for cleanup_zombie */
struct local_client *pipe_client;
pthread_t threadid;
enum { PRE_COMMAND, POST_COMMAND } state;
pthread_mutex_t mutex; /* Main thread and worker synchronisation */
pthread_cond_t cond;
};
/* Entries for PIPE clients */
struct pipe_bits {
struct local_client *client; /* Actual (localsock) client */
pthread_t threadid; /* Our own copy of the thread id */
};
/* Entries for Network socket clients */
struct netsock_bits {
void *private;
int flags;
};
typedef int (*fd_callback_t) (struct local_client * fd, char *buf, int len,
const char *csid,
struct local_client ** new_client);
/* One of these for each fd we are listening on */
struct local_client {
int fd;
enum { CLUSTER_MAIN_SOCK, CLUSTER_DATA_SOCK, LOCAL_RENDEZVOUS,
LOCAL_SOCK, THREAD_PIPE, CLUSTER_INTERNAL } type;
struct local_client *next;
unsigned short xid;
fd_callback_t callback;
uint8_t removeme;
union {
struct localsock_bits localsock;
struct pipe_bits pipe;
struct netsock_bits net;
} bits;
};
#define DEBUGLOG(fmt, args...) debuglog(fmt, ## args)
#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))
#endif
/* The real command processor is in clvmd-command.c */
extern int do_command(struct local_client *client, struct clvm_header *msg,
int msglen, char **buf, int buflen, int *retlen);
/* Pre and post command routines are called only on the local node */
extern int do_pre_command(struct local_client *client);
extern int do_post_command(struct local_client *client);
extern void cmd_client_cleanup(struct local_client *client);
extern int add_client(struct local_client *new_client);
extern void clvmd_cluster_init_completed(void);
extern void process_message(struct local_client *client, char *buf,
int len, const char *csid);
extern void debuglog(const char *fmt, ... )
__attribute__ ((format(printf, 1, 2)));
void clvmd_set_debug(debug_t new_de);
debug_t clvmd_get_debug(void);
int clvmd_get_foreground(void);
int sync_lock(const char *resource, int mode, int flags, int *lockid);
int sync_unlock(const char *resource, int lockid);
#endif
|
