1 files changed, 102 insertions, 0 deletions
diff --git a/fs/afs/server.h b/fs/afs/server.h
new file mode 100644
index 000000000000..c3d24115578f
--- /dev/null
+++ b/fs/afs/server.h
@@ -0,0 +1,102 @@
+/* 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 inline
+struct 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 */