/* server.h: AFS server record * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _LINUX_AFS_SERVER_H#define _LINUX_AFS_SERVER_H #include "types.h"#include "kafstimod.h"#include <rxrpc/peer.h>#include <linux/rwsem.h> extern spinlock_t afs_server_peer_lock; /*****************************************************************************//* * AFS server record */struct afs_server{	atomic_t		usage;	struct afs_cell		*cell;		/* cell in which server resides */	struct list_head	link;		/* link in cell's server list */	struct rw_semaphore	sem;		/* access lock */	struct afs_timer	timeout;	/* graveyard timeout */	struct in_addr		addr;		/* server address */	struct rxrpc_peer	*peer;		/* peer record for this server */	struct rxrpc_connection	*vlserver;	/* connection to the volume location service */ 	/* file service access */#define AFS_SERVER_CONN_LIST_SIZE 2	struct rxrpc_connection	*fs_conn[AFS_SERVER_CONN_LIST_SIZE]; /* FS connections */	unsigned		fs_conn_cnt[AFS_SERVER_CONN_LIST_SIZE];	/* per conn call count */	struct list_head	fs_callq;	/* queue of processes waiting to make a call */	spinlock_t		fs_lock;	/* access lock */	int			fs_state;      	/* 0 or reason FS currently marked dead (-errno) */	unsigned		fs_rtt;		/* FS round trip time */	unsigned long		fs_act_jif;	/* time at which last activity occurred */	unsigned long		fs_dead_jif;	/* time at which no longer to be considered dead */ 	/* callback promise management */	struct list_head	cb_promises;	/* as yet unbroken promises from this server */	spinlock_t		cb_lock;	/* access lock */}; extern int afs_server_lookup(struct afs_cell *cell,			     const struct in_addr *addr,			     struct afs_server **_server); #define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0) extern void afs_put_server(struct afs_server *server);extern void afs_server_do_timeout(struct afs_server *server); extern int afs_server_find_by_peer(const struct rxrpc_peer *peer,				   struct afs_server **_server); extern int afs_server_get_vlconn(struct afs_server *server,				 struct rxrpc_connection **_conn); static inlinestruct afs_server *afs_server_get_from_peer(struct rxrpc_peer *peer){	struct afs_server *server; 	spin_lock(&afs_server_peer_lock);	server = peer->user;	if (server)		afs_get_server(server);	spin_unlock(&afs_server_peer_lock); 	return server;} /*****************************************************************************//* * AFS server callslot grant record */struct afs_server_callslot{	struct list_head	link;		/* link in server's list */	struct task_struct	*task;		/* process waiting to make call */	struct rxrpc_connection	*conn;		/* connection to use (or NULL on error) */	short			nconn;		/* connection slot number (-1 on error) */	char			ready;		/* T when ready */	int			errno;		/* error number if nconn==-1 */}; extern int afs_server_request_callslot(struct afs_server *server,				       struct afs_server_callslot *callslot); extern void afs_server_release_callslot(struct afs_server *server,					struct afs_server_callslot *callslot); #endif /* _LINUX_AFS_SERVER_H */