/* * Copyright (C) Igor Sysoev * Copyright (C) NGINX, Inc. */ #ifndef _NXT_PORT_H_INCLUDED_ #define _NXT_PORT_H_INCLUDED_ struct nxt_port_handlers_s { /* RPC responses. */ nxt_port_handler_t rpc_ready; nxt_port_handler_t rpc_error; /* Main process RPC requests. */ nxt_port_handler_t start_worker; nxt_port_handler_t socket; nxt_port_handler_t modules; nxt_port_handler_t conf_store; /* File descriptor exchange. */ nxt_port_handler_t change_file; nxt_port_handler_t new_port; nxt_port_handler_t mmap; /* New process ready. */ nxt_port_handler_t process_ready; /* Process exit/crash notification. */ nxt_port_handler_t remove_pid; /* Stop process command. */ nxt_port_handler_t quit; /* Various data. */ nxt_port_handler_t data; }; #define nxt_port_handler_idx(name) \ ( offsetof(nxt_port_handlers_t, name) / sizeof(nxt_port_handler_t) ) typedef enum { NXT_PORT_MSG_LAST = 0x100, NXT_PORT_MSG_CLOSE_FD = 0x200, NXT_PORT_MSG_SYNC = 0x400, NXT_PORT_MSG_MASK = 0xFF, _NXT_PORT_MSG_RPC_READY = nxt_port_handler_idx(rpc_ready), _NXT_PORT_MSG_RPC_ERROR = nxt_port_handler_idx(rpc_error), _NXT_PORT_MSG_START_WORKER = nxt_port_handler_idx(start_worker), _NXT_PORT_MSG_SOCKET = nxt_port_handler_idx(socket), _NXT_PORT_MSG_MODULES = nxt_port_handler_idx(modules), _NXT_PORT_MSG_CONF_STORE = nxt_port_handler_idx(conf_store), _NXT_PORT_MSG_CHANGE_FILE = nxt_port_handler_idx(change_file), _NXT_PORT_MSG_NEW_PORT = nxt_port_handler_idx(new_port), _NXT_PORT_MSG_MMAP = nxt_port_handler_idx(mmap), _NXT_PORT_MSG_PROCESS_READY = nxt_port_handler_idx(process_ready), _NXT_PORT_MSG_REMOVE_PID = nxt_port_handler_idx(remove_pid), _NXT_PORT_MSG_QUIT = nxt_port_handler_idx(quit), _NXT_PORT_MSG_DATA = nxt_port_handler_idx(data), NXT_PORT_MSG_MAX = sizeof(nxt_port_handlers_t) / sizeof(nxt_port_handler_t), NXT_PORT_MSG_RPC_READY = _NXT_PORT_MSG_RPC_READY, NXT_PORT_MSG_RPC_READY_LAST = _NXT_PORT_MSG_RPC_READY | NXT_PORT_MSG_LAST, NXT_PORT_MSG_RPC_ERROR = _NXT_PORT_MSG_RPC_ERROR | NXT_PORT_MSG_LAST, NXT_PORT_MSG_START_WORKER = _NXT_PORT_MSG_START_WORKER | NXT_PORT_MSG_LAST, NXT_PORT_MSG_SOCKET = _NXT_PORT_MSG_SOCKET | NXT_PORT_MSG_LAST, NXT_PORT_MSG_MODULES = _NXT_PORT_MSG_MODULES | NXT_PORT_MSG_LAST, NXT_PORT_MSG_CONF_STORE = _NXT_PORT_MSG_CONF_STORE | NXT_PORT_MSG_LAST, NXT_PORT_MSG_CHANGE_FILE = _NXT_PORT_MSG_CHANGE_FILE | NXT_PORT_MSG_LAST, NXT_PORT_MSG_NEW_PORT = _NXT_PORT_MSG_NEW_PORT | NXT_PORT_MSG_LAST, NXT_PORT_MSG_MMAP = _NXT_PORT_MSG_MMAP | NXT_PORT_MSG_LAST | NXT_PORT_MSG_CLOSE_FD | NXT_PORT_MSG_SYNC, NXT_PORT_MSG_PROCESS_READY = _NXT_PORT_MSG_PROCESS_READY | NXT_PORT_MSG_LAST, NXT_PORT_MSG_QUIT = _NXT_PORT_MSG_QUIT | NXT_PORT_MSG_LAST, NXT_PORT_MSG_REMOVE_PID = _NXT_PORT_MSG_REMOVE_PID | NXT_PORT_MSG_LAST, NXT_PORT_MSG_DATA = _NXT_PORT_MSG_DATA, NXT_PORT_MSG_DATA_LAST = _NXT_PORT_MSG_DATA | NXT_PORT_MSG_LAST, } nxt_port_msg_type_t; /* Passed as a first iov chunk. */ typedef struct { uint32_t stream; nxt_pid_t pid; nxt_port_id_t reply_port; uint8_t type; /* Last message for this stream. */ uint8_t last; /* 1 bit */ /* Message data send using mmap, next chunk is a nxt_port_mmap_msg_t. */ uint8_t mmap; /* 1 bit */ /* Non-First fragment in fragmented message sequence. */ uint8_t nf; /* 1 bit */ /* More Fragments followed. */ uint8_t mf; /* 1 bit */ /* Message delivery tracking enabled, next chunk is tracking msg. */ uint8_t tracking; /* 1 bit */ } nxt_port_msg_t; typedef struct { nxt_queue_link_t link; nxt_buf_t *buf; size_t share; nxt_fd_t fd; nxt_bool_t close_fd; nxt_port_msg_t port_msg; uint32_t tracking_msg[2]; nxt_work_t work; } nxt_port_send_msg_t; struct nxt_port_recv_msg_s { nxt_fd_t fd; nxt_buf_t *buf; nxt_port_t *port; nxt_port_msg_t port_msg; size_t size; nxt_bool_t cancelled; union { nxt_port_t *new_port; nxt_pid_t removed_pid; void *data; } u; }; typedef struct nxt_app_s nxt_app_t; struct nxt_port_s { nxt_fd_event_t socket; nxt_queue_link_t link; /* for nxt_process_t.ports */ nxt_process_t *process; nxt_queue_link_t app_link; /* for nxt_app_t.ports */ nxt_app_t *app; nxt_queue_link_t idle_link; /* for nxt_app_t.idle_ports */ nxt_msec_t idle_start; nxt_queue_t messages; /* of nxt_port_send_msg_t */ nxt_thread_mutex_t write_mutex; /* Maximum size of message part. */ uint32_t max_size; /* Maximum interleave of message parts. */ uint32_t max_share; uint32_t app_pending_responses; uint32_t app_responses; nxt_queue_t pending_requests; nxt_port_handler_t handler; nxt_port_handler_t *data; nxt_mp_t *mem_pool; nxt_event_engine_t *engine; nxt_buf_t *free_bufs; nxt_socket_t pair[2]; nxt_port_id_t id; nxt_pid_t pid; nxt_lvlhsh_t rpc_streams; /* stream to nxt_port_rpc_reg_t */ nxt_lvlhsh_t rpc_peers; /* peer to queue of nxt_port_rpc_reg_t */ nxt_lvlhsh_t frags; nxt_atomic_t use_count; nxt_process_type_t type; struct iovec *iov; void *mmsg_buf; }; typedef struct { nxt_port_id_t id; nxt_pid_t pid; size_t max_size; size_t max_share; nxt_process_type_t type:8; } nxt_port_msg_new_port_t; /* * nxt_port_data_t size is allocation size * which enables effective reuse of memory pool cache. */ typedef union { nxt_buf_t buf; nxt_port_msg_new_port_t new_port; } nxt_port_data_t; typedef void (*nxt_port_post_handler_t)(nxt_task_t *task, nxt_port_t *port, void *data); nxt_port_t *nxt_port_new(nxt_task_t *task, nxt_port_id_t id, nxt_pid_t pid, nxt_process_type_t type); nxt_port_id_t nxt_port_get_next_id(void); void nxt_port_reset_next_id(void); nxt_int_t nxt_port_socket_init(nxt_task_t *task, nxt_port_t *port, size_t max_size); void nxt_port_destroy(nxt_port_t *port); void nxt_port_close(nxt_task_t *task, nxt_port_t *port); void nxt_port_write_enable(nxt_task_t *task, nxt_port_t *port); void nxt_port_write_close(nxt_port_t *port); void nxt_port_read_enable(nxt_task_t *task, nxt_port_t *port); void nxt_port_read_close(nxt_port_t *port); nxt_int_t nxt_port_socket_twrite(nxt_task_t *task, nxt_port_t *port, nxt_uint_t type, nxt_fd_t fd, uint32_t stream, nxt_port_id_t reply_port, nxt_buf_t *b, void *tracking); nxt_inline nxt_int_t nxt_port_socket_write(nxt_task_t *task, nxt_port_t *port, nxt_uint_t type, nxt_fd_t fd, uint32_t stream, nxt_port_id_t reply_port, nxt_buf_t *b) { return nxt_port_socket_twrite(task, port, type, fd, stream, reply_port, b, NULL); } void nxt_port_enable(nxt_task_t *task, nxt_port_t *port, nxt_port_handlers_t *handlers); nxt_int_t nxt_port_send_port(nxt_task_t *task, nxt_port_t *port, nxt_port_t *new_port, uint32_t stream); void nxt_port_change_log_file(nxt_task_t *task, nxt_runtime_t *rt, nxt_uint_t slot, nxt_fd_t fd); void nxt_port_quit_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_new_port_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_process_ready_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_change_log_file_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_mmap_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_data_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_remove_pid_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); void nxt_port_empty_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg); nxt_int_t nxt_port_post(nxt_task_t *task, nxt_port_t *port, nxt_port_post_handler_t handler, void *data); void nxt_port_use(nxt_task_t *task, nxt_port_t *port, int i); nxt_inline void nxt_port_inc_use(nxt_port_t *port) { nxt_atomic_fetch_add(&port->use_count, 1); } #endif /* _NXT_PORT_H_INCLUDED_ */