diff options
Diffstat (limited to 'drivers/staging/ramster/cluster/tcp.h')
| -rw-r--r-- | drivers/staging/ramster/cluster/tcp.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/staging/ramster/cluster/tcp.h b/drivers/staging/ramster/cluster/tcp.h new file mode 100644 index 000000000000..9d05833452b5 --- /dev/null +++ b/drivers/staging/ramster/cluster/tcp.h @@ -0,0 +1,159 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * tcp.h + * + * Function prototypes + * + * Copyright (C) 2004 Oracle. All rights reserved. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * 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 021110-1307, USA. + * + */ + +#ifndef R2CLUSTER_TCP_H +#define R2CLUSTER_TCP_H + +#include <linux/socket.h> +#ifdef __KERNEL__ +#include <net/sock.h> +#include <linux/tcp.h> +#else +#include <sys/socket.h> +#endif +#include <linux/inet.h> +#include <linux/in.h> + +struct r2net_msg { + __be16 magic; + __be16 data_len; + __be16 msg_type; + __be16 pad1; + __be32 sys_status; + __be32 status; + __be32 key; + __be32 msg_num; + __u8 buf[0]; +}; + +typedef int (r2net_msg_handler_func)(struct r2net_msg *msg, u32 len, void *data, + void **ret_data); +typedef void (r2net_post_msg_handler_func)(int status, void *data, + void *ret_data); + +#define R2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct r2net_msg)) + +/* same as hb delay, we're waiting for another node to recognize our hb */ +#define R2NET_RECONNECT_DELAY_MS_DEFAULT 2000 + +#define R2NET_KEEPALIVE_DELAY_MS_DEFAULT 2000 +#define R2NET_IDLE_TIMEOUT_MS_DEFAULT 30000 + + +/* TODO: figure this out.... */ +static inline int r2net_link_down(int err, struct socket *sock) +{ + if (sock) { + if (sock->sk->sk_state != TCP_ESTABLISHED && + sock->sk->sk_state != TCP_CLOSE_WAIT) + return 1; + } + + if (err >= 0) + return 0; + switch (err) { + + /* ????????????????????????? */ + case -ERESTARTSYS: + case -EBADF: + /* When the server has died, an ICMP port unreachable + * message prompts ECONNREFUSED. */ + case -ECONNREFUSED: + case -ENOTCONN: + case -ECONNRESET: + case -EPIPE: + return 1; + + } + return 0; +} + +enum { + R2NET_DRIVER_UNINITED, + R2NET_DRIVER_READY, +}; + +int r2net_send_message(u32 msg_type, u32 key, void *data, u32 len, + u8 target_node, int *status); +int r2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec, + size_t veclen, u8 target_node, int *status); + +int r2net_register_handler(u32 msg_type, u32 key, u32 max_len, + r2net_msg_handler_func *func, void *data, + r2net_post_msg_handler_func *post_func, + struct list_head *unreg_list); +void r2net_unregister_handler_list(struct list_head *list); + +void r2net_fill_node_map(unsigned long *map, unsigned bytes); + +void r2net_force_data_magic(struct r2net_msg *, u16, u32); +void r2net_hb_node_up_manual(int); +struct r2net_node *r2net_nn_from_num(u8); + +struct r2nm_node; +int r2net_register_hb_callbacks(void); +void r2net_unregister_hb_callbacks(void); +int r2net_start_listening(struct r2nm_node *node); +void r2net_stop_listening(struct r2nm_node *node); +void r2net_disconnect_node(struct r2nm_node *node); +int r2net_num_connected_peers(void); + +int r2net_init(void); +void r2net_exit(void); + +struct r2net_send_tracking; +struct r2net_sock_container; + +#if 0 +int r2net_debugfs_init(void); +void r2net_debugfs_exit(void); +void r2net_debug_add_nst(struct r2net_send_tracking *nst); +void r2net_debug_del_nst(struct r2net_send_tracking *nst); +void r2net_debug_add_sc(struct r2net_sock_container *sc); +void r2net_debug_del_sc(struct r2net_sock_container *sc); +#else +static inline int r2net_debugfs_init(void) +{ + return 0; +} +static inline void r2net_debugfs_exit(void) +{ +} +static inline void r2net_debug_add_nst(struct r2net_send_tracking *nst) +{ +} +static inline void r2net_debug_del_nst(struct r2net_send_tracking *nst) +{ +} +static inline void r2net_debug_add_sc(struct r2net_sock_container *sc) +{ +} +static inline void r2net_debug_del_sc(struct r2net_sock_container *sc) +{ +} +#endif /* CONFIG_DEBUG_FS */ + +#endif /* R2CLUSTER_TCP_H */ |