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127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/*
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* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _CLVMD_H
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#define _CLVMD_H
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#define CLVMD_MAJOR_VERSION 0
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#define CLVMD_MINOR_VERSION 2
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#define CLVMD_PATCH_VERSION 1
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/* Name of the cluster LVM admin lock */
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#define ADMIN_LOCK_NAME "CLVMD_ADMIN"
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/* Default time (in seconds) we will wait for all remote commands to execute
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before declaring them dead */
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#define DEFAULT_CMD_TIMEOUT 60
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/* One of these for each reply we get from command execution on a node */
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struct node_reply {
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char node[MAX_CLUSTER_MEMBER_NAME_LEN];
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char *replymsg;
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int status;
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struct node_reply *next;
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};
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typedef enum {DEBUG_OFF, DEBUG_STDERR, DEBUG_SYSLOG} debug_t;
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/*
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* These exist for the use of local sockets only when we are
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* collecting responses from all cluster nodes
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*/
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struct localsock_bits {
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struct node_reply *replies;
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int num_replies;
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int expected_replies;
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time_t sent_time; /* So we can check for timeouts */
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int in_progress; /* Only execute one cmd at a time per client */
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int sent_out; /* Flag to indicate that a command was sent
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to remote nodes */
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void *private; /* Private area for command processor use */
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void *cmd; /* Whole command as passed down local socket */
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int cmd_len; /* Length of above */
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int pipe; /* Pipe to send PRE completion status down */
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int finished; /* Flag to tell subthread to exit */
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int all_success; /* Set to 0 if any node (or the pre_command)
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failed */
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struct local_client *pipe_client;
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pthread_t threadid;
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enum { PRE_COMMAND, POST_COMMAND, QUIT } state;
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pthread_mutex_t mutex; /* Main thread and worker synchronisation */
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pthread_cond_t cond;
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pthread_mutex_t reply_mutex; /* Protect reply structure */
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};
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/* Entries for PIPE clients */
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struct pipe_bits {
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struct local_client *client; /* Actual (localsock) client */
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pthread_t threadid; /* Our own copy of the thread id */
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};
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/* Entries for Network socket clients */
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struct netsock_bits {
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void *private;
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int flags;
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};
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typedef int (*fd_callback_t) (struct local_client * fd, char *buf, int len,
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const char *csid,
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struct local_client ** new_client);
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/* One of these for each fd we are listening on */
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struct local_client {
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int fd;
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enum { CLUSTER_MAIN_SOCK, CLUSTER_DATA_SOCK, LOCAL_RENDEZVOUS,
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LOCAL_SOCK, THREAD_PIPE, CLUSTER_INTERNAL } type;
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struct local_client *next;
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unsigned short xid;
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fd_callback_t callback;
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uint8_t removeme;
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union {
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struct localsock_bits localsock;
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struct pipe_bits pipe;
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struct netsock_bits net;
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} bits;
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};
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#define DEBUGLOG(fmt, args...) debuglog(fmt, ## args);
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#ifndef max
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#define max(a,b) ((a)>(b)?(a):(b))
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#endif
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/* The real command processor is in clvmd-command.c */
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extern int do_command(struct local_client *client, struct clvm_header *msg,
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int msglen, char **buf, int buflen, int *retlen);
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/* Pre and post command routines are called only on the local node */
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extern int do_pre_command(struct local_client *client);
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extern int do_post_command(struct local_client *client);
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extern void cmd_client_cleanup(struct local_client *client);
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extern int add_client(struct local_client *new_client);
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extern void clvmd_cluster_init_completed(void);
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extern void process_message(struct local_client *client, const char *buf,
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int len, const char *csid);
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extern void debuglog(const char *fmt, ... )
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__attribute__ ((format(printf, 1, 2)));
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int sync_lock(const char *resource, int mode, int flags, int *lockid);
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int sync_unlock(const char *resource, int lockid);
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#endif
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