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Diffstat (limited to 'rpc/rpc-lib/src/rpc-drc.h')
| -rw-r--r-- | rpc/rpc-lib/src/rpc-drc.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/rpc/rpc-lib/src/rpc-drc.h b/rpc/rpc-lib/src/rpc-drc.h new file mode 100644 index 000000000..0a1688992 --- /dev/null +++ b/rpc/rpc-lib/src/rpc-drc.h @@ -0,0 +1,100 @@ +/* + Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#ifndef RPC_DRC_H +#define RPC_DRC_H + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "rpcsvc-common.h" +#include "rpcsvc.h" +#include "locking.h" +#include "dict.h" +#include "rb.h" + +/* per-client cache structure */ +struct drc_client { + uint32_t ref; + union gf_sock_union sock_union; + /* pointers to the cache */ + struct rb_table *rbtree; + /* no. of ops currently cached */ + uint32_t op_count; + struct list_head client_list; +}; + +struct drc_cached_op { + drc_op_state_t state; + uint32_t xid; + int prognum; + int progversion; + int procnum; + rpc_transport_msg_t msg; + drc_client_t *client; + struct list_head client_list; + struct list_head global_list; + int32_t ref; +}; + +/* global drc definitions */ +enum drc_status { + DRC_UNINITIATED, + DRC_INITIATED +}; +typedef enum drc_status drc_status_t; + +struct drc_globals { + /* allocator must be the first member since + * it is used so in gf_libavl_allocator + */ + struct libavl_allocator allocator; + drc_type_t type; + /* configurable size parameter */ + uint32_t global_cache_size; + drc_lru_factor_t lru_factor; + gf_lock_t lock; + drc_status_t status; + uint32_t op_count; + uint64_t cache_hits; + uint64_t intransit_hits; + struct mem_pool *mempool; + struct list_head cache_head; + uint32_t client_count; + struct list_head clients_head; +}; + +int +rpcsvc_need_drc (rpcsvc_request_t *req); + +drc_cached_op_t * +rpcsvc_drc_lookup (rpcsvc_request_t *req); + +int +rpcsvc_send_cached_reply (rpcsvc_request_t *req, drc_cached_op_t *reply); + +int +rpcsvc_cache_reply (rpcsvc_request_t *req, struct iobref *iobref, + struct iovec *rpchdr, int rpchdrcount, + struct iovec *proghdr, int proghdrcount, + struct iovec *payload, int payloadcount); + +int +rpcsvc_cache_request (rpcsvc_request_t *req); + +int32_t +rpcsvc_drc_priv (rpcsvc_drc_globals_t *drc); + +int +rpcsvc_drc_init (rpcsvc_t *svc, dict_t *options); + +#endif /* RPC_DRC_H */ |