/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2002 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre 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 Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #ifndef _LUSTRE_NET_H #define _LUSTRE_NET_H #include #include #include #include #include #include /* default rpc ring length */ #define RPC_RING_LENGTH 10 struct ptlrpc_connection { struct list_head c_link; struct lustre_peer c_peer; __u8 c_local_uuid[37]; /* XXX do we need this? */ __u8 c_remote_uuid[37]; int c_level; __u32 c_generation; /* changes upon new connection */ __u32 c_epoch; /* changes when peer changes */ __u32 c_bootcount; /* peer's boot count */ spinlock_t c_lock; __u32 c_xid_in; __u32 c_xid_out; atomic_t c_refcount; __u64 c_token; __u64 c_remote_conn; __u64 c_remote_token; __u64 c_last_xid; __u64 c_last_committed; struct list_head c_delayed_head; /* delayed until post-recovery */ struct list_head c_sending_head; struct list_head c_dying_head; struct recovd_data c_recovd_data; struct list_head c_clients; /* XXXshaver will be c_imports */ struct list_head c_exports; /* should this be in recovd_data? */ struct recovd_obd *c_recovd; }; struct ptlrpc_client { struct obd_device *cli_obd; __u32 cli_request_portal; __u32 cli_reply_portal; __u32 cli_target_devno; struct ptlrpc_connection *cli_connection; void *cli_data; struct semaphore cli_rpc_sem; /* limits outstanding requests */ struct list_head cli_client_chain; char *cli_name; }; /* state flags of requests */ #define PTL_RPC_FL_INTR (1 << 0) #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */ #define PTL_RPC_FL_SENT (1 << 2) #define PTL_BULK_FL_SENT (1 << 3) #define PTL_BULK_FL_RCVD (1 << 4) #define PTL_RPC_FL_ERR (1 << 5) #define PTL_RPC_FL_TIMEOUT (1 << 6) #define PTL_RPC_FL_RESEND (1 << 7) #define PTL_RPC_FL_RECOVERY (1 << 8) /* retransmission for recovery */ #define PTL_RPC_FL_FINISHED (1 << 9) #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */ #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */ #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */ struct ptlrpc_request { int rq_type; /* one of PTL_RPC_REQUEST, PTL_RPC_REPLY, PTL_RPC_BULK */ struct list_head rq_list; struct list_head rq_multi; struct obd_device *rq_obd; int rq_status; int rq_flags; __u32 rq_connid; atomic_t rq_refcount; int rq_reqlen; struct lustre_msg *rq_reqmsg; int rq_replen; struct lustre_msg *rq_repmsg; __u64 rq_transno; __u64 rq_xid; char *rq_bulkbuf; int rq_bulklen; int rq_level; time_t rq_time; time_t rq_timeout; // void * rq_reply_handle; wait_queue_head_t rq_wait_for_rep; /* incoming reply */ ptl_md_t rq_reply_md; ptl_handle_md_t rq_reply_md_h; ptl_handle_me_t rq_reply_me_h; /* outgoing req/rep */ ptl_md_t rq_req_md; ptl_handle_md_t rq_req_md_h; struct lustre_peer rq_peer; /* XXX see service.c can this be factored away? */ struct obd_export *rq_export; struct ptlrpc_connection *rq_connection; struct ptlrpc_client *rq_client; struct ptlrpc_service *rq_svc; }; struct ptlrpc_bulk_page { struct ptlrpc_bulk_desc *b_desc; struct list_head b_link; char *b_buf; int b_buflen; struct page *b_page; __u32 b_xid; __u32 b_flags; struct dentry *b_dentry; int (*b_cb)(struct ptlrpc_bulk_page *); }; struct ptlrpc_bulk_desc { int b_flags; struct ptlrpc_connection *b_connection; struct ptlrpc_client *b_client; __u32 b_portal; struct lustre_handle b_conn; void (*b_cb)(struct ptlrpc_bulk_desc *, void *); void *b_cb_data; wait_queue_head_t b_waitq; struct list_head b_page_list; __u32 b_page_count; atomic_t b_refcount; void *b_desc_private; struct tq_struct b_queue; ptl_md_t b_md; ptl_handle_md_t b_md_h; ptl_handle_me_t b_me_h; struct iovec b_iov[16]; /* self-sized pre-allocated iov */ }; struct ptlrpc_thread { struct list_head t_link; __u32 t_flags; wait_queue_head_t t_ctl_waitq; }; struct ptlrpc_service { time_t srv_time; time_t srv_timeout; /* incoming request buffers */ /* FIXME: perhaps a list of EQs, if multiple NIs are used? */ char *srv_buf[RPC_RING_LENGTH]; __u32 srv_ref_count[RPC_RING_LENGTH]; ptl_handle_me_t srv_me_h[RPC_RING_LENGTH]; __u32 srv_buf_size; __u32 srv_ring_length; __u32 srv_req_portal; __u32 srv_rep_portal; __u32 srv_xid; /* event queue */ ptl_handle_eq_t srv_eq_h; struct lustre_peer srv_self; wait_queue_head_t srv_waitq; /* all threads sleep on this */ spinlock_t srv_lock; struct list_head srv_reqs; struct list_head srv_threads; int (*srv_handler)(struct ptlrpc_request *req); char *srv_name; /* only statically allocated strings here; we don't clean them */ }; static inline void ptlrpc_hdl2req(struct ptlrpc_request *req, struct lustre_handle *h) { req->rq_reqmsg->addr = h->addr; req->rq_reqmsg->cookie = h->cookie; } struct ptlrpc_request *ptlrpc_prep_req2(struct lustre_handle *conn, int opcode, int count, int *lengths, char **bufs); typedef void (*bulk_callback_t)(struct ptlrpc_bulk_desc *, void *); typedef int (*svc_handler_t)(struct ptlrpc_request *req); /* rpc/connection.c */ void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, char *uuid); struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer); int ptlrpc_put_connection(struct ptlrpc_connection *c); struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *); void ptlrpc_init_connection(void); void ptlrpc_cleanup_connection(void); /* rpc/niobuf.c */ int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk); int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk); int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *); int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *); int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk); int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req); int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req); void ptlrpc_resend_req(struct ptlrpc_request *request); int ptl_send_rpc(struct ptlrpc_request *request); void ptlrpc_link_svc_me(struct ptlrpc_service *service, int i); /* rpc/client.c */ void ptlrpc_init_client(int req_portal, int rep_portal, struct ptlrpc_client *, struct ptlrpc_connection *); void ptlrpc_cleanup_client(struct ptlrpc_client *cli); __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req); struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid); int ptlrpc_queue_wait(struct ptlrpc_request *req); void ptlrpc_continue_req(struct ptlrpc_request *req); int ptlrpc_replay_req(struct ptlrpc_request *req); void ptlrpc_restart_req(struct ptlrpc_request *req); struct ptlrpc_request *ptlrpc_prep_req(struct ptlrpc_client *cl, int opcode, int count, int *lengths, char **bufs); void ptlrpc_free_req(struct ptlrpc_request *request); void ptlrpc_req_finished(struct ptlrpc_request *request); struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *); void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk); struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc); void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page); int ptlrpc_check_status(struct ptlrpc_request *req, int err); /* rpc/service.c */ struct ptlrpc_service * ptlrpc_init_svc(__u32 bufsize, int req_portal, int rep_portal, char *uuid, svc_handler_t, char *name); void ptlrpc_stop_all_threads(struct ptlrpc_service *svc); int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc, char *name); int ptlrpc_unregister_service(struct ptlrpc_service *service); struct ptlrpc_svc_data { char *name; struct ptlrpc_service *svc; struct ptlrpc_thread *thread; struct obd_device *dev; }; /* rpc/pack_generic.c */ int lustre_pack_msg(int count, int *lens, char **bufs, int *len, struct lustre_msg **msg); int lustre_msg_size(int count, int *lengths); int lustre_unpack_msg(struct lustre_msg *m, int len); void *lustre_msg_buf(struct lustre_msg *m, int n); static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc) { if (atomic_dec_and_test(&desc->b_refcount)) { CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc); ptlrpc_free_bulk(desc); } else { CDEBUG(D_PAGE, "%p -> %d\n", desc, atomic_read(&desc->b_refcount)); } } static inline void ptlrpc_bulk_addref(struct ptlrpc_bulk_desc *desc) { atomic_inc(&desc->b_refcount); CDEBUG(D_PAGE, "Set refcount of %p to %d\n", desc, atomic_read(&desc->b_refcount)); } #endif