/*
* 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
*/
/* Name of the cluster LVM admin lock */
#define ADMIN_LOCK_NAME "CLVMD_ADMIN"
/* 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;
};
/*
* 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 */
struct local_client *pipe_client;
pthread_t threadid;
enum { PRE_COMMAND, POST_COMMAND, QUIT } 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;
#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);
