/* SPDX-License-Identifier: GPL-2.0-or-later */ /* AF_RXRPC internal definitions * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells ([email protected]) */ #include <linux/atomic.h> #include <linux/seqlock.h> #include <linux/win_minmax.h> #include <net/net_namespace.h> #include <net/netns/generic.h> #include <net/sock.h> #include <net/af_rxrpc.h> #include <keys/rxrpc-type.h> #include "protocol.h" #define FCRYPT_BSIZE … struct rxrpc_crypt { … } __attribute__((aligned …)); #define rxrpc_queue_work(WS) … #define rxrpc_queue_delayed_work(WS,D) … struct key_preparsed_payload; struct rxrpc_connection; struct rxrpc_txbuf; /* * Mark applied to socket buffers in skb->mark. skb->priority is used * to pass supplementary information. */ enum rxrpc_skb_mark { … }; /* * sk_state for RxRPC sockets */ enum { … }; /* * Per-network namespace data. */ struct rxrpc_net { … }; /* * Service backlog preallocation. * * This contains circular buffers of preallocated peers, connections and calls * for incoming service calls and their head and tail pointers. This allows * calls to be set up in the data_ready handler, thereby avoiding the need to * shuffle packets around so much. */ struct rxrpc_backlog { … }; /* * RxRPC socket definition */ struct rxrpc_sock { … }; #define rxrpc_sk(__sk) … /* * CPU-byteorder normalised Rx packet header. */ struct rxrpc_host_header { … } __packed; /* * RxRPC socket buffer private variables * - max 48 bytes (struct sk_buff::cb) */ struct rxrpc_skb_priv { … }; #define rxrpc_skb(__skb) … /* * RxRPC security module interface */ struct rxrpc_security { … }; /* * RxRPC local transport endpoint description * - owned by a single AF_RXRPC socket * - pointed to by transport socket struct sk_user_data */ struct rxrpc_local { … }; /* * RxRPC remote transport endpoint definition * - matched by local endpoint, remote port, address and protocol type */ struct rxrpc_peer { … }; /* * Keys for matching a connection. */ struct rxrpc_conn_proto { … }; struct rxrpc_conn_parameters { … }; /* * Call completion condition (state == RXRPC_CALL_COMPLETE). */ enum rxrpc_call_completion { … }; /* * Bits in the connection flags. */ enum rxrpc_conn_flag { … }; #define RXRPC_CONN_FINAL_ACK_MASK … /* * Events that can be raised upon a connection. */ enum rxrpc_conn_event { … }; /* * The connection protocol state. */ enum rxrpc_conn_proto_state { … }; /* * RxRPC client connection bundle. */ struct rxrpc_bundle { … }; /* * RxRPC connection definition * - matched by { local, peer, epoch, conn_id, direction } * - each connection can only handle four simultaneous calls */ struct rxrpc_connection { … }; static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) { … } static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) { … } /* * Flags in call->flags. */ enum rxrpc_call_flag { … }; /* * Events that can be raised on a call. */ enum rxrpc_call_event { … }; /* * The states that a call can be in. */ enum rxrpc_call_state { … }; /* * Call Tx congestion management modes. */ enum rxrpc_congest_mode { … }; /* * RxRPC call definition * - matched by { connection, call_id } */ struct rxrpc_call { … }; /* * Summary of a new ACK and the changes it made to the Tx buffer packet states. */ struct rxrpc_ack_summary { … }; /* * sendmsg() cmsg-specified parameters. */ enum rxrpc_command { … }; struct rxrpc_call_params { … }; struct rxrpc_send_params { … }; /* * Buffer of data to be output as a packet. */ struct rxrpc_txbuf { … }; static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) { … } static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) { … } #include <trace/events/rxrpc.h> /* * Allocate the next serial number on a connection. 0 must be skipped. */ static inline rxrpc_serial_t rxrpc_get_next_serial(struct rxrpc_connection *conn) { … } /* * af_rxrpc.c */ extern atomic_t rxrpc_n_rx_skbs; extern struct workqueue_struct *rxrpc_workqueue; /* * call_accept.c */ int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); void rxrpc_discard_prealloc(struct rxrpc_sock *); bool rxrpc_new_incoming_call(struct rxrpc_local *local, struct rxrpc_peer *peer, struct rxrpc_connection *conn, struct sockaddr_rxrpc *peer_srx, struct sk_buff *skb); void rxrpc_accept_incoming_calls(struct rxrpc_local *); int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); /* * call_event.c */ void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, enum rxrpc_propose_ack_trace why); void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, enum rxrpc_propose_ack_trace); void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *); void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb); bool rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb); /* * call_object.c */ extern const char *const rxrpc_call_states[]; extern const char *const rxrpc_call_completions[]; extern struct kmem_cache *rxrpc_call_jar; void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what); struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, struct rxrpc_conn_parameters *, struct rxrpc_call_params *, gfp_t, unsigned int); void rxrpc_start_call_timer(struct rxrpc_call *call); void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, struct sk_buff *); void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); void rxrpc_release_calls_on_socket(struct rxrpc_sock *); void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace); struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_cleanup_call(struct rxrpc_call *); void rxrpc_destroy_all_calls(struct rxrpc_net *); static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) { … } static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) { … } /* * call_state.c */ bool rxrpc_set_call_completion(struct rxrpc_call *call, enum rxrpc_call_completion compl, u32 abort_code, int error); bool rxrpc_call_completed(struct rxrpc_call *call); bool rxrpc_abort_call(struct rxrpc_call *call, rxrpc_seq_t seq, u32 abort_code, int error, enum rxrpc_abort_reason why); void rxrpc_prefail_call(struct rxrpc_call *call, enum rxrpc_call_completion compl, int error); static inline void rxrpc_set_call_state(struct rxrpc_call *call, enum rxrpc_call_state state) { … } static inline enum rxrpc_call_state __rxrpc_call_state(const struct rxrpc_call *call) { … } static inline bool __rxrpc_call_is_complete(const struct rxrpc_call *call) { … } static inline enum rxrpc_call_state rxrpc_call_state(const struct rxrpc_call *call) { … } static inline bool rxrpc_call_is_complete(const struct rxrpc_call *call) { … } static inline bool rxrpc_call_has_failed(const struct rxrpc_call *call) { … } /* * conn_client.c */ extern unsigned int rxrpc_reap_client_connections; extern unsigned long rxrpc_conn_idle_client_expiry; extern unsigned long rxrpc_conn_idle_client_fast_expiry; void rxrpc_purge_client_connections(struct rxrpc_local *local); struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace); int rxrpc_look_up_bundle(struct rxrpc_call *call, gfp_t gfp); void rxrpc_connect_client_calls(struct rxrpc_local *local); void rxrpc_expose_client_call(struct rxrpc_call *); void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle); void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); void rxrpc_discard_expired_client_conns(struct rxrpc_local *local); void rxrpc_clean_up_local_conns(struct rxrpc_local *); /* * conn_event.c */ void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, struct sk_buff *skb, unsigned int channel); int rxrpc_abort_conn(struct rxrpc_connection *conn, struct sk_buff *skb, s32 abort_code, int err, enum rxrpc_abort_reason why); void rxrpc_process_connection(struct work_struct *); void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); bool rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb); void rxrpc_input_conn_event(struct rxrpc_connection *conn, struct sk_buff *skb); static inline bool rxrpc_is_conn_aborted(const struct rxrpc_connection *conn) { … } /* * conn_object.c */ extern unsigned int rxrpc_connection_expiry; extern unsigned int rxrpc_closed_conn_expiry; void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why); struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t); struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *, struct sockaddr_rxrpc *, struct sk_buff *); void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); void rxrpc_disconnect_call(struct rxrpc_call *); void rxrpc_kill_client_conn(struct rxrpc_connection *); void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace); void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *, enum rxrpc_conn_trace); void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace); void rxrpc_service_connection_reaper(struct work_struct *); void rxrpc_destroy_all_connections(struct rxrpc_net *); static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) { … } static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) { … } static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, unsigned long expire_at) { … } /* * conn_service.c */ struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, struct sk_buff *); struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, const struct rxrpc_security *, struct sk_buff *); void rxrpc_unpublish_service_conn(struct rxrpc_connection *); /* * input.c */ void rxrpc_congestion_degrade(struct rxrpc_call *); void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *); void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *); /* * io_thread.c */ int rxrpc_encap_rcv(struct sock *, struct sk_buff *); void rxrpc_error_report(struct sock *); bool rxrpc_direct_abort(struct sk_buff *skb, enum rxrpc_abort_reason why, s32 abort_code, int err); int rxrpc_io_thread(void *data); static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local) { … } static inline bool rxrpc_protocol_error(struct sk_buff *skb, enum rxrpc_abort_reason why) { … } /* * insecure.c */ extern const struct rxrpc_security rxrpc_no_security; /* * key.c */ extern struct key_type key_type_rxrpc; int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, u32); /* * local_event.c */ void rxrpc_gen_version_string(void); void rxrpc_send_version_request(struct rxrpc_local *local, struct rxrpc_host_header *hdr, struct sk_buff *skb); /* * local_object.c */ void rxrpc_local_dont_fragment(const struct rxrpc_local *local, bool set); struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace); struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace); void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace); struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace); void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace); void rxrpc_destroy_local(struct rxrpc_local *local); void rxrpc_destroy_all_locals(struct rxrpc_net *); static inline bool __rxrpc_use_local(struct rxrpc_local *local, enum rxrpc_local_trace why) { … } static inline void rxrpc_see_local(struct rxrpc_local *local, enum rxrpc_local_trace why) { … } /* * misc.c */ extern unsigned int rxrpc_max_backlog __read_mostly; extern unsigned long rxrpc_soft_ack_delay; extern unsigned long rxrpc_idle_ack_delay; extern unsigned int rxrpc_rx_window_size; extern unsigned int rxrpc_rx_mtu; extern unsigned int rxrpc_rx_jumbo_max; #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY extern unsigned long rxrpc_inject_rx_delay; #endif /* * net_ns.c */ extern unsigned int rxrpc_net_id; extern struct pernet_operations rxrpc_net_ops; static inline struct rxrpc_net *rxrpc_net(struct net *net) { … } /* * output.c */ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason, rxrpc_serial_t serial, enum rxrpc_propose_ack_trace why); int rxrpc_send_abort_packet(struct rxrpc_call *); void rxrpc_send_conn_abort(struct rxrpc_connection *conn); void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb); void rxrpc_send_keepalive(struct rxrpc_peer *); void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb); /* * peer_event.c */ void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *); void rxrpc_peer_keepalive_worker(struct work_struct *); /* * peer_object.c */ struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, const struct sockaddr_rxrpc *); struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local, struct sockaddr_rxrpc *srx, gfp_t gfp); struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t, enum rxrpc_peer_trace); void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer); void rxrpc_destroy_all_peers(struct rxrpc_net *); struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace); void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace); /* * proc.c */ extern const struct seq_operations rxrpc_call_seq_ops; extern const struct seq_operations rxrpc_connection_seq_ops; extern const struct seq_operations rxrpc_bundle_seq_ops; extern const struct seq_operations rxrpc_peer_seq_ops; extern const struct seq_operations rxrpc_local_seq_ops; /* * recvmsg.c */ void rxrpc_notify_socket(struct rxrpc_call *); int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); /* * Abort a call due to a protocol error. */ static inline int rxrpc_abort_eproto(struct rxrpc_call *call, struct sk_buff *skb, s32 abort_code, enum rxrpc_abort_reason why) { … } /* * rtt.c */ void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); ktime_t rxrpc_get_rto_backoff(struct rxrpc_peer *peer, bool retrans); void rxrpc_peer_init_rtt(struct rxrpc_peer *); /* * rxkad.c */ #ifdef CONFIG_RXKAD extern const struct rxrpc_security rxkad; #endif /* * security.c */ int __init rxrpc_init_security(void); const struct rxrpc_security *rxrpc_security_lookup(u8); void rxrpc_exit_security(void); int rxrpc_init_client_call_security(struct rxrpc_call *); int rxrpc_init_client_conn_security(struct rxrpc_connection *); const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, struct sk_buff *); struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, struct sk_buff *, u32, u32); /* * sendmsg.c */ bool rxrpc_propose_abort(struct rxrpc_call *call, s32 abort_code, int error, enum rxrpc_abort_reason why); int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); /* * server_key.c */ extern struct key_type key_type_rxrpc_s; int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); /* * skbuff.c */ void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); void rxrpc_purge_queue(struct sk_buff_head *); /* * stats.c */ int rxrpc_stats_show(struct seq_file *seq, void *v); int rxrpc_stats_clear(struct file *file, char *buf, size_t size); #define rxrpc_inc_stat(rxnet, s) … #define rxrpc_dec_stat(rxnet, s) … /* * sysctl.c */ #ifdef CONFIG_SYSCTL extern int __init rxrpc_sysctl_init(void); extern void rxrpc_sysctl_exit(void); #else static inline int __init rxrpc_sysctl_init(void) { return 0; } static inline void rxrpc_sysctl_exit(void) {} #endif /* * txbuf.c */ extern atomic_t rxrpc_nr_txbuf; struct rxrpc_txbuf *rxrpc_alloc_data_txbuf(struct rxrpc_call *call, size_t data_size, size_t data_align, gfp_t gfp); struct rxrpc_txbuf *rxrpc_alloc_ack_txbuf(struct rxrpc_call *call, size_t sack_size); void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); /* * utils.c */ int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); static inline bool before(u32 seq1, u32 seq2) { … } static inline bool before_eq(u32 seq1, u32 seq2) { … } static inline bool after(u32 seq1, u32 seq2) { … } static inline bool after_eq(u32 seq1, u32 seq2) { … } /* * debug tracing */ extern unsigned int rxrpc_debug; #define dbgprintk(FMT,...) … #define kenter(FMT,...) … #define kleave(FMT,...) … #define kdebug(FMT,...) … #if defined(__KDEBUG) #define _enter … #define _leave … #define _debug … #elif defined(CONFIG_AF_RXRPC_DEBUG) #define RXRPC_DEBUG_KENTER … #define RXRPC_DEBUG_KLEAVE … #define RXRPC_DEBUG_KDEBUG … #define _enter(FMT,...) … #define _leave(FMT,...) … #define _debug(FMT,...) … #else #define _enter … #define _leave … #define _debug … #endif /* * debug assertion checking */ #if 1 // defined(__KDEBUGALL) #define ASSERT(X) … #define ASSERTCMP(X, OP, Y) … #define ASSERTIF(C, X) … #define ASSERTIFCMP(C, X, OP, Y) … #else #define ASSERT … #define ASSERTCMP … #define ASSERTIF … #define ASSERTIFCMP … #endif /* __KDEBUGALL */
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