117926a79SDavid Howells /* AF_RXRPC internal definitions 217926a79SDavid Howells * 317926a79SDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 417926a79SDavid Howells * Written by David Howells (dhowells@redhat.com) 517926a79SDavid Howells * 617926a79SDavid Howells * This program is free software; you can redistribute it and/or 717926a79SDavid Howells * modify it under the terms of the GNU General Public License 817926a79SDavid Howells * as published by the Free Software Foundation; either version 917926a79SDavid Howells * 2 of the License, or (at your option) any later version. 1017926a79SDavid Howells */ 1117926a79SDavid Howells 12be6e6707SDavid Howells #include <linux/atomic.h> 138496af50SDavid Howells #include <linux/seqlock.h> 14e0e4d82fSDavid Howells #include <net/sock.h> 15be6e6707SDavid Howells #include <net/af_rxrpc.h> 1617926a79SDavid Howells #include <rxrpc/packet.h> 1717926a79SDavid Howells 1817926a79SDavid Howells #if 0 1917926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 2017926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 2117926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 2217926a79SDavid Howells #else 2317926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2417926a79SDavid Howells #endif 2517926a79SDavid Howells 2617926a79SDavid Howells #define FCRYPT_BSIZE 8 2717926a79SDavid Howells struct rxrpc_crypt { 2817926a79SDavid Howells union { 2917926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 3091e916cfSAl Viro __be32 n[2]; 3117926a79SDavid Howells }; 3217926a79SDavid Howells } __attribute__((aligned(8))); 3317926a79SDavid Howells 34651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 35651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 36651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 37651350d1SDavid Howells 38651350d1SDavid Howells #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) 3917926a79SDavid Howells 40cc8feb8eSDavid Howells struct rxrpc_connection; 41cc8feb8eSDavid Howells 4217926a79SDavid Howells /* 4317926a79SDavid Howells * sk_state for RxRPC sockets 4417926a79SDavid Howells */ 4517926a79SDavid Howells enum { 462341e077SDavid Howells RXRPC_UNBOUND = 0, 472341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 4817926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 4917926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5017926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 5117926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 5217926a79SDavid Howells }; 5317926a79SDavid Howells 5417926a79SDavid Howells /* 5517926a79SDavid Howells * RxRPC socket definition 5617926a79SDavid Howells */ 5717926a79SDavid Howells struct rxrpc_sock { 5817926a79SDavid Howells /* WARNING: sk has to be the first member */ 5917926a79SDavid Howells struct sock sk; 60651350d1SDavid Howells rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ 6117926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 6217926a79SDavid Howells struct list_head listen_link; /* link in the local endpoint's listen list */ 6317926a79SDavid Howells struct list_head secureq; /* calls awaiting connection security clearance */ 6417926a79SDavid Howells struct list_head acceptq; /* calls awaiting acceptance */ 6517926a79SDavid Howells struct key *key; /* security for this socket */ 6617926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 6717926a79SDavid Howells struct rb_root calls; /* outstanding calls on this socket */ 6817926a79SDavid Howells unsigned long flags; 692341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 7017926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 7117926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 7217926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 73cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 74cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 7517926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 762341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 7717926a79SDavid Howells }; 7817926a79SDavid Howells 7917926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 8017926a79SDavid Howells 8117926a79SDavid Howells /* 820d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 830d12f8a4SDavid Howells */ 840d12f8a4SDavid Howells struct rxrpc_host_header { 850d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 860d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 870d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 880d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 890d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 900d12f8a4SDavid Howells u8 type; /* packet type */ 910d12f8a4SDavid Howells u8 flags; /* packet flags */ 920d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 930d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 940d12f8a4SDavid Howells union { 950d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 960d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 970d12f8a4SDavid Howells }; 980d12f8a4SDavid Howells u16 serviceId; /* service ID */ 990d12f8a4SDavid Howells } __packed; 1000d12f8a4SDavid Howells 1010d12f8a4SDavid Howells /* 10217926a79SDavid Howells * RxRPC socket buffer private variables 10317926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 10417926a79SDavid Howells */ 10517926a79SDavid Howells struct rxrpc_skb_priv { 10617926a79SDavid Howells struct rxrpc_call *call; /* call with which associated */ 10717926a79SDavid Howells unsigned long resend_at; /* time in jiffies at which to resend */ 10817926a79SDavid Howells union { 10995c96174SEric Dumazet unsigned int offset; /* offset into buffer of next read */ 11017926a79SDavid Howells int remain; /* amount of space remaining for next write */ 11117926a79SDavid Howells u32 error; /* network error code */ 11217926a79SDavid Howells bool need_resend; /* T if needs resending */ 11317926a79SDavid Howells }; 11417926a79SDavid Howells 1150d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 11617926a79SDavid Howells }; 11717926a79SDavid Howells 11817926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 11917926a79SDavid Howells 12017926a79SDavid Howells enum rxrpc_command { 12117926a79SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 12217926a79SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 12317926a79SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 12417926a79SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 12517926a79SDavid Howells }; 12617926a79SDavid Howells 12717926a79SDavid Howells /* 12817926a79SDavid Howells * RxRPC security module interface 12917926a79SDavid Howells */ 13017926a79SDavid Howells struct rxrpc_security { 13117926a79SDavid Howells const char *name; /* name of this service */ 13217926a79SDavid Howells u8 security_index; /* security type provided */ 13317926a79SDavid Howells 134648af7fcSDavid Howells /* Initialise a security service */ 135648af7fcSDavid Howells int (*init)(void); 136648af7fcSDavid Howells 137648af7fcSDavid Howells /* Clean up a security service */ 138648af7fcSDavid Howells void (*exit)(void); 139648af7fcSDavid Howells 14017926a79SDavid Howells /* initialise a connection's security */ 14117926a79SDavid Howells int (*init_connection_security)(struct rxrpc_connection *); 14217926a79SDavid Howells 14317926a79SDavid Howells /* prime a connection's packet security */ 144a263629dSHerbert Xu int (*prime_packet_security)(struct rxrpc_connection *); 14517926a79SDavid Howells 14617926a79SDavid Howells /* impose security on a packet */ 147a263629dSHerbert Xu int (*secure_packet)(struct rxrpc_call *, 14817926a79SDavid Howells struct sk_buff *, 14917926a79SDavid Howells size_t, 15017926a79SDavid Howells void *); 15117926a79SDavid Howells 15217926a79SDavid Howells /* verify the security on a received packet */ 153a263629dSHerbert Xu int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *); 15417926a79SDavid Howells 15517926a79SDavid Howells /* issue a challenge */ 15617926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 15717926a79SDavid Howells 15817926a79SDavid Howells /* respond to a challenge */ 15917926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 16017926a79SDavid Howells struct sk_buff *, 16117926a79SDavid Howells u32 *); 16217926a79SDavid Howells 16317926a79SDavid Howells /* verify a response */ 16417926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 16517926a79SDavid Howells struct sk_buff *, 16617926a79SDavid Howells u32 *); 16717926a79SDavid Howells 16817926a79SDavid Howells /* clear connection security */ 16917926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 17017926a79SDavid Howells }; 17117926a79SDavid Howells 17217926a79SDavid Howells /* 1734f95dd78SDavid Howells * RxRPC local transport endpoint description 1744f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 1754f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 17617926a79SDavid Howells */ 17717926a79SDavid Howells struct rxrpc_local { 1784f95dd78SDavid Howells struct rcu_head rcu; 1794f95dd78SDavid Howells atomic_t usage; 1804f95dd78SDavid Howells struct list_head link; 18117926a79SDavid Howells struct socket *socket; /* my UDP socket */ 1824f95dd78SDavid Howells struct work_struct processor; 18317926a79SDavid Howells struct list_head services; /* services listening on this endpoint */ 18417926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 18517926a79SDavid Howells struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 18617926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 18744ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 188999b69f8SDavid Howells struct rb_root client_conns; /* Client connections by socket params */ 189999b69f8SDavid Howells spinlock_t client_conns_lock; /* Lock for client_conns */ 19017926a79SDavid Howells spinlock_t lock; /* access lock */ 19117926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 19217926a79SDavid Howells int debug_id; /* debug ID for printks */ 1934f95dd78SDavid Howells bool dead; 19417926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 19517926a79SDavid Howells }; 19617926a79SDavid Howells 19717926a79SDavid Howells /* 19817926a79SDavid Howells * RxRPC remote transport endpoint definition 199be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 20017926a79SDavid Howells */ 20117926a79SDavid Howells struct rxrpc_peer { 202be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 203be6e6707SDavid Howells atomic_t usage; 204be6e6707SDavid Howells unsigned long hash_key; 205be6e6707SDavid Howells struct hlist_node hash_link; 206be6e6707SDavid Howells struct rxrpc_local *local; 207f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 208f66d7490SDavid Howells struct work_struct error_distributor; 209aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 2108496af50SDavid Howells seqlock_t service_conn_lock; 21117926a79SDavid Howells spinlock_t lock; /* access lock */ 21295c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 21395c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 21495c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 21517926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 21617926a79SDavid Howells int debug_id; /* debug ID for printks */ 217f66d7490SDavid Howells int error_report; /* Net (+0) or local (+1000000) to distribute */ 218f66d7490SDavid Howells #define RXRPC_LOCAL_ERROR_OFFSET 1000000 21917926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 22017926a79SDavid Howells 22117926a79SDavid Howells /* calculated RTT cache */ 22217926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 22317926a79SDavid Howells suseconds_t rtt; /* current RTT estimate (in uS) */ 22495c96174SEric Dumazet unsigned int rtt_point; /* next entry at which to insert */ 22595c96174SEric Dumazet unsigned int rtt_usage; /* amount of cache actually used */ 22617926a79SDavid Howells suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 22717926a79SDavid Howells }; 22817926a79SDavid Howells 22917926a79SDavid Howells /* 23019ffa01cSDavid Howells * Keys for matching a connection. 23119ffa01cSDavid Howells */ 23219ffa01cSDavid Howells struct rxrpc_conn_proto { 233e8d70ce1SDavid Howells union { 234e8d70ce1SDavid Howells struct { 23519ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 23619ffa01cSDavid Howells u32 cid; /* connection ID */ 237e8d70ce1SDavid Howells }; 238e8d70ce1SDavid Howells u64 index_key; 23919ffa01cSDavid Howells }; 24019ffa01cSDavid Howells }; 24119ffa01cSDavid Howells 24219ffa01cSDavid Howells struct rxrpc_conn_parameters { 24319ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 24419ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 24519ffa01cSDavid Howells struct key *key; /* Security details */ 24619ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 24719ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 24819ffa01cSDavid Howells u32 security_level; /* Security level selected */ 24919ffa01cSDavid Howells }; 25019ffa01cSDavid Howells 25119ffa01cSDavid Howells /* 252bba304dbSDavid Howells * Bits in the connection flags. 253bba304dbSDavid Howells */ 254bba304dbSDavid Howells enum rxrpc_conn_flag { 255bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 256001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 257001c1122SDavid Howells RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 258bba304dbSDavid Howells }; 259bba304dbSDavid Howells 260bba304dbSDavid Howells /* 261bba304dbSDavid Howells * Events that can be raised upon a connection. 262bba304dbSDavid Howells */ 263bba304dbSDavid Howells enum rxrpc_conn_event { 264bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 265bba304dbSDavid Howells }; 266bba304dbSDavid Howells 267bba304dbSDavid Howells /* 268bba304dbSDavid Howells * The connection protocol state. 269bba304dbSDavid Howells */ 270bba304dbSDavid Howells enum rxrpc_conn_proto_state { 271bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 272bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 273bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 274bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 275bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 276bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 277bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 278bba304dbSDavid Howells RXRPC_CONN_NETWORK_ERROR, /* Conn terminated by network error */ 279bba304dbSDavid Howells RXRPC_CONN__NR_STATES 280bba304dbSDavid Howells }; 281bba304dbSDavid Howells 282bba304dbSDavid Howells /* 28317926a79SDavid Howells * RxRPC connection definition 284aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 28517926a79SDavid Howells * - each connection can only handle four simultaneous calls 28617926a79SDavid Howells */ 28717926a79SDavid Howells struct rxrpc_connection { 28819ffa01cSDavid Howells struct rxrpc_conn_proto proto; 28919ffa01cSDavid Howells struct rxrpc_conn_parameters params; 29019ffa01cSDavid Howells 291999b69f8SDavid Howells spinlock_t channel_lock; 292a1399f8bSDavid Howells 293a1399f8bSDavid Howells struct rxrpc_channel { 294a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 295a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 296a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 297a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 298a1399f8bSDavid Howells u32 last_result; /* Result of last call (0/abort) */ 299a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 300999b69f8SDavid Howells wait_queue_head_t channel_wq; /* queue to wait for channel to become available */ 301999b69f8SDavid Howells 302dee46364SDavid Howells struct rcu_head rcu; 30317926a79SDavid Howells struct work_struct processor; /* connection event processor */ 304999b69f8SDavid Howells union { 305999b69f8SDavid Howells struct rb_node client_node; /* Node in local->client_conns */ 306aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 307999b69f8SDavid Howells }; 30817926a79SDavid Howells struct list_head link; /* link in master connection list */ 30917926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 310648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 31117926a79SDavid Howells struct key *server_key; /* security for this service */ 3121afe593bSHerbert Xu struct crypto_skcipher *cipher; /* encryption handle */ 31317926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 3144a3388c8SDavid Howells unsigned long flags; 31517926a79SDavid Howells unsigned long events; 316f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 31717926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 31817926a79SDavid Howells atomic_t usage; 319bba304dbSDavid Howells enum rxrpc_conn_proto_state state : 8; /* current state of connection */ 320dc44b3a0SDavid Howells u32 local_abort; /* local abort code */ 321dc44b3a0SDavid Howells u32 remote_abort; /* remote abort code */ 322dc44b3a0SDavid Howells int error; /* local error incurred */ 32317926a79SDavid Howells int debug_id; /* debug ID for printks */ 32417926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 325563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 326999b69f8SDavid Howells atomic_t avail_chans; /* number of channels available */ 32717926a79SDavid Howells u8 size_align; /* data size alignment (for security) */ 32817926a79SDavid Howells u8 header_size; /* rxrpc + security header size */ 32917926a79SDavid Howells u8 security_size; /* security header size */ 33017926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 33117926a79SDavid Howells u8 security_ix; /* security type */ 33217926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 33317926a79SDavid Howells }; 33417926a79SDavid Howells 33517926a79SDavid Howells /* 3365b8848d1SDavid Howells * Flags in call->flags. 3375b8848d1SDavid Howells */ 3385b8848d1SDavid Howells enum rxrpc_call_flag { 3395b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 3405b8848d1SDavid Howells RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ 3415b8848d1SDavid Howells RXRPC_CALL_RCVD_LAST, /* all packets received */ 3425b8848d1SDavid Howells RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ 3435b8848d1SDavid Howells RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ 3445b8848d1SDavid Howells RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 3455b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 3465b8848d1SDavid Howells RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ 347dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 3485b8848d1SDavid Howells }; 3495b8848d1SDavid Howells 3505b8848d1SDavid Howells /* 3515b8848d1SDavid Howells * Events that can be raised on a call. 3525b8848d1SDavid Howells */ 3535b8848d1SDavid Howells enum rxrpc_call_event { 3544c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ 3554c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ 3564c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ 3574c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ 3584c198ad1SDavid Howells RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ 3594c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 3604c198ad1SDavid Howells RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ 3614c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 3624c198ad1SDavid Howells RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ 3634c198ad1SDavid Howells RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ 3644c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 3654c198ad1SDavid Howells RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ 3664c198ad1SDavid Howells RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ 3674c198ad1SDavid Howells RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ 3684c198ad1SDavid Howells RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ 3694c198ad1SDavid Howells RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ 3704c198ad1SDavid Howells RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ 3715b8848d1SDavid Howells }; 3725b8848d1SDavid Howells 3735b8848d1SDavid Howells /* 3745b8848d1SDavid Howells * The states that a call can be in. 3755b8848d1SDavid Howells */ 3765b8848d1SDavid Howells enum rxrpc_call_state { 377999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 378999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 3795b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 3805b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 3815b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 3825b8848d1SDavid Howells RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 3835b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 3845b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 3855b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 3865b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 3875b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 3885b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 3895b8848d1SDavid Howells RXRPC_CALL_COMPLETE, /* - call completed */ 3905b8848d1SDavid Howells RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 3915b8848d1SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 3925b8848d1SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 3935b8848d1SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 3945b8848d1SDavid Howells RXRPC_CALL_DEAD, /* - call is dead */ 3955b8848d1SDavid Howells NR__RXRPC_CALL_STATES 3965b8848d1SDavid Howells }; 3975b8848d1SDavid Howells 3985b8848d1SDavid Howells /* 39917926a79SDavid Howells * RxRPC call definition 40017926a79SDavid Howells * - matched by { connection, call_id } 40117926a79SDavid Howells */ 40217926a79SDavid Howells struct rxrpc_call { 403dee46364SDavid Howells struct rcu_head rcu; 40417926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 40517926a79SDavid Howells struct rxrpc_sock *socket; /* socket responsible */ 40617926a79SDavid Howells struct timer_list lifetimer; /* lifetime remaining on call */ 40717926a79SDavid Howells struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 40817926a79SDavid Howells struct timer_list ack_timer; /* ACK generation timer */ 40917926a79SDavid Howells struct timer_list resend_timer; /* Tx resend timer */ 41017926a79SDavid Howells struct work_struct destroyer; /* call destroyer */ 41117926a79SDavid Howells struct work_struct processor; /* packet processor and ACK generator */ 41217926a79SDavid Howells struct list_head link; /* link in master call list */ 413f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 41417926a79SDavid Howells struct list_head accept_link; /* calls awaiting acceptance */ 41517926a79SDavid Howells struct rb_node sock_node; /* node in socket call tree */ 41617926a79SDavid Howells struct sk_buff_head rx_queue; /* received packets */ 41717926a79SDavid Howells struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 41817926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 41917926a79SDavid Howells wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 420a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 42117926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 42217926a79SDavid Howells unsigned long creation_jif; /* time of call creation */ 42317926a79SDavid Howells unsigned long flags; 42417926a79SDavid Howells unsigned long events; 42517926a79SDavid Howells spinlock_t lock; 42617926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 42717926a79SDavid Howells atomic_t usage; 428372ee163SDavid Howells atomic_t skb_count; /* Outstanding packets on this call */ 42917926a79SDavid Howells atomic_t sequence; /* Tx data packet sequence counter */ 430dc44b3a0SDavid Howells u32 local_abort; /* local abort code */ 431dc44b3a0SDavid Howells u32 remote_abort; /* remote abort code */ 432f66d7490SDavid Howells int error_report; /* Network error (ICMP/local transport) */ 433f66d7490SDavid Howells int error; /* Local error incurred */ 4345b8848d1SDavid Howells enum rxrpc_call_state state : 8; /* current state of call */ 435dabe5a79SDavid Howells u16 service_id; /* service ID */ 436dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 437dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 438dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 43917926a79SDavid Howells 44017926a79SDavid Howells /* transmission-phase ACK management */ 4414e36a95eSDavid Howells u8 acks_head; /* offset into window of first entry */ 4424e36a95eSDavid Howells u8 acks_tail; /* offset into window of last entry */ 4434e36a95eSDavid Howells u8 acks_winsz; /* size of un-ACK'd window */ 4444e36a95eSDavid Howells u8 acks_unacked; /* lowest unacked packet in last ACK received */ 44517926a79SDavid Howells int acks_latest; /* serial number of latest ACK received */ 44617926a79SDavid Howells rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 44717926a79SDavid Howells unsigned long *acks_window; /* sent packet window 44817926a79SDavid Howells * - elements are pointers with LSB set if ACK'd 44917926a79SDavid Howells */ 45017926a79SDavid Howells 45117926a79SDavid Howells /* receive-phase ACK management */ 45217926a79SDavid Howells rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 45317926a79SDavid Howells rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 45417926a79SDavid Howells rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 45517926a79SDavid Howells rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 45617926a79SDavid Howells rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 45717926a79SDavid Howells rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 4580d12f8a4SDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 4594e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 460563ea7d5SDavid Howells u16 ackr_skew; /* skew on packet being ACK'd */ 4610d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 46217926a79SDavid Howells atomic_t ackr_not_idle; /* number of packets in Rx queue */ 46317926a79SDavid Howells 46417926a79SDavid Howells /* received packet records, 1 bit per record */ 46517926a79SDavid Howells #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 46617926a79SDavid Howells unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 46717926a79SDavid Howells }; 46817926a79SDavid Howells 46917926a79SDavid Howells /* 47017926a79SDavid Howells * locally abort an RxRPC call 47117926a79SDavid Howells */ 47217926a79SDavid Howells static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 47317926a79SDavid Howells { 47417926a79SDavid Howells write_lock_bh(&call->state_lock); 47517926a79SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 476dc44b3a0SDavid Howells call->local_abort = abort_code; 47717926a79SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 4784c198ad1SDavid Howells set_bit(RXRPC_CALL_EV_ABORT, &call->events); 47917926a79SDavid Howells } 48017926a79SDavid Howells write_unlock_bh(&call->state_lock); 48117926a79SDavid Howells } 48217926a79SDavid Howells 483df844fd4SDavid Howells #include <trace/events/rxrpc.h> 484df844fd4SDavid Howells 48517926a79SDavid Howells /* 486651350d1SDavid Howells * af_rxrpc.c 48717926a79SDavid Howells */ 488651350d1SDavid Howells extern atomic_t rxrpc_n_skbs; 4890d12f8a4SDavid Howells extern u32 rxrpc_epoch; 490651350d1SDavid Howells extern atomic_t rxrpc_debug_id; 491651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 49217926a79SDavid Howells 49317926a79SDavid Howells /* 4940d81a51aSDavid Howells * call_accept.c 49517926a79SDavid Howells */ 4964f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 497c1b1203dSJoe Perches struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 498c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 49917926a79SDavid Howells 50017926a79SDavid Howells /* 5010d81a51aSDavid Howells * call_event.c 50217926a79SDavid Howells */ 503563ea7d5SDavid Howells void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); 504563ea7d5SDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); 505c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 50617926a79SDavid Howells 50717926a79SDavid Howells /* 5080d81a51aSDavid Howells * call_object.c 50917926a79SDavid Howells */ 510dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 511dad8aff7SDavid Howells extern unsigned int rxrpc_dead_call_expiry; 51217926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 51317926a79SDavid Howells extern struct list_head rxrpc_calls; 51417926a79SDavid Howells extern rwlock_t rxrpc_call_lock; 51517926a79SDavid Howells 5162341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 5172341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 51819ffa01cSDavid Howells struct rxrpc_conn_parameters *, 519999b69f8SDavid Howells struct sockaddr_rxrpc *, 5202341e077SDavid Howells unsigned long, gfp_t); 521c1b1203dSJoe Perches struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 52217926a79SDavid Howells struct rxrpc_connection *, 52342886ffeSDavid Howells struct sk_buff *); 524c1b1203dSJoe Perches void rxrpc_release_call(struct rxrpc_call *); 525c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 526c1b1203dSJoe Perches void __rxrpc_put_call(struct rxrpc_call *); 527c1b1203dSJoe Perches void __exit rxrpc_destroy_all_calls(void); 52817926a79SDavid Howells 529dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 530dabe5a79SDavid Howells { 531dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 532dabe5a79SDavid Howells } 533dabe5a79SDavid Howells 534dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 535dabe5a79SDavid Howells { 536dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 537dabe5a79SDavid Howells } 538dabe5a79SDavid Howells 53917926a79SDavid Howells /* 5404a3388c8SDavid Howells * conn_client.c 5414a3388c8SDavid Howells */ 5424a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 5434a3388c8SDavid Howells 544eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 545c6d2b8d7SDavid Howells int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 546c6d2b8d7SDavid Howells struct sockaddr_rxrpc *, gfp_t); 547001c1122SDavid Howells void rxrpc_unpublish_client_conn(struct rxrpc_connection *); 5484a3388c8SDavid Howells 5494a3388c8SDavid Howells /* 5500d81a51aSDavid Howells * conn_event.c 5510d81a51aSDavid Howells */ 5520d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 5530d81a51aSDavid Howells void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 5544f95dd78SDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 5550d81a51aSDavid Howells 5560d81a51aSDavid Howells /* 5570d81a51aSDavid Howells * conn_object.c 55817926a79SDavid Howells */ 559dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 56017926a79SDavid Howells extern struct list_head rxrpc_connections; 56117926a79SDavid Howells extern rwlock_t rxrpc_connection_lock; 56217926a79SDavid Howells 5638496af50SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 564c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 5658496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 566aa390bbeSDavid Howells struct sk_buff *); 567a1399f8bSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_call *); 568999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 569f51b4480SDavid Howells void __rxrpc_put_connection(struct rxrpc_connection *); 570c1b1203dSJoe Perches void __exit rxrpc_destroy_all_connections(void); 57117926a79SDavid Howells 57219ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 57319ffa01cSDavid Howells { 57419ffa01cSDavid Howells return conn->out_clientflag; 57519ffa01cSDavid Howells } 57619ffa01cSDavid Howells 57719ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 57819ffa01cSDavid Howells { 579e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 58019ffa01cSDavid Howells } 58119ffa01cSDavid Howells 5825627cc8bSDavid Howells static inline void rxrpc_get_connection(struct rxrpc_connection *conn) 5835627cc8bSDavid Howells { 5845627cc8bSDavid Howells atomic_inc(&conn->usage); 5855627cc8bSDavid Howells } 5865627cc8bSDavid Howells 5872c4579e4SDavid Howells static inline 5882c4579e4SDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) 5892c4579e4SDavid Howells { 5902c4579e4SDavid Howells return atomic_inc_not_zero(&conn->usage) ? conn : NULL; 5912c4579e4SDavid Howells } 5925acbee46SDavid Howells 593f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 594f51b4480SDavid Howells { 595f51b4480SDavid Howells if (conn && atomic_dec_return(&conn->usage) == 1) 596f51b4480SDavid Howells __rxrpc_put_connection(conn); 597f51b4480SDavid Howells } 598f51b4480SDavid Howells 599f51b4480SDavid Howells 6008496af50SDavid Howells static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) 6015acbee46SDavid Howells { 6028496af50SDavid Howells if (!rxrpc_get_connection_maybe(conn)) 6038496af50SDavid Howells return false; 6048496af50SDavid Howells if (!rxrpc_queue_work(&conn->processor)) 6052c4579e4SDavid Howells rxrpc_put_connection(conn); 6068496af50SDavid Howells return true; 6075acbee46SDavid Howells } 6085acbee46SDavid Howells 60917926a79SDavid Howells /* 6107877a4a4SDavid Howells * conn_service.c 6117877a4a4SDavid Howells */ 6128496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 6138496af50SDavid Howells struct sk_buff *); 6147877a4a4SDavid Howells struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, 615d991b4a3SDavid Howells struct sockaddr_rxrpc *, 6167877a4a4SDavid Howells struct sk_buff *); 617001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 6187877a4a4SDavid Howells 6197877a4a4SDavid Howells /* 6200d81a51aSDavid Howells * input.c 62117926a79SDavid Howells */ 622676d2369SDavid S. Miller void rxrpc_data_ready(struct sock *); 623c1b1203dSJoe Perches int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 624c1b1203dSJoe Perches void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 62517926a79SDavid Howells 62617926a79SDavid Howells /* 6270d81a51aSDavid Howells * insecure.c 62817926a79SDavid Howells */ 6290d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 63017926a79SDavid Howells 63117926a79SDavid Howells /* 6320d81a51aSDavid Howells * key.c 63317926a79SDavid Howells */ 63417926a79SDavid Howells extern struct key_type key_type_rxrpc; 63517926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 63617926a79SDavid Howells 637c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 638c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 639c1b1203dSJoe Perches int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 640c1b1203dSJoe Perches u32); 64117926a79SDavid Howells 64217926a79SDavid Howells /* 64387563616SDavid Howells * local_event.c 64487563616SDavid Howells */ 6454f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 64687563616SDavid Howells 64787563616SDavid Howells /* 6480d81a51aSDavid Howells * local_object.c 64917926a79SDavid Howells */ 6504f95dd78SDavid Howells struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); 6514f95dd78SDavid Howells void __rxrpc_put_local(struct rxrpc_local *); 6520d81a51aSDavid Howells void __exit rxrpc_destroy_all_locals(void); 653e0e4d82fSDavid Howells 6544f95dd78SDavid Howells static inline void rxrpc_get_local(struct rxrpc_local *local) 6554f95dd78SDavid Howells { 6564f95dd78SDavid Howells atomic_inc(&local->usage); 6574f95dd78SDavid Howells } 6584f95dd78SDavid Howells 6594f95dd78SDavid Howells static inline 6604f95dd78SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 6614f95dd78SDavid Howells { 6624f95dd78SDavid Howells return atomic_inc_not_zero(&local->usage) ? local : NULL; 6634f95dd78SDavid Howells } 6644f95dd78SDavid Howells 6654f95dd78SDavid Howells static inline void rxrpc_put_local(struct rxrpc_local *local) 6664f95dd78SDavid Howells { 6675627cc8bSDavid Howells if (local && atomic_dec_and_test(&local->usage)) 6684f95dd78SDavid Howells __rxrpc_put_local(local); 6694f95dd78SDavid Howells } 6704f95dd78SDavid Howells 6715acbee46SDavid Howells static inline void rxrpc_queue_local(struct rxrpc_local *local) 6725acbee46SDavid Howells { 6735acbee46SDavid Howells rxrpc_queue_work(&local->processor); 6745acbee46SDavid Howells } 6755acbee46SDavid Howells 676e0e4d82fSDavid Howells /* 6778e688d9cSDavid Howells * misc.c 6788e688d9cSDavid Howells */ 6790e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 6808e688d9cSDavid Howells extern unsigned int rxrpc_requested_ack_delay; 6818e688d9cSDavid Howells extern unsigned int rxrpc_soft_ack_delay; 6828e688d9cSDavid Howells extern unsigned int rxrpc_idle_ack_delay; 6838e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 6848e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 6858e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 6868e688d9cSDavid Howells 6875b3e87f1SDavid Howells extern const char *const rxrpc_pkts[]; 6888e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 6898e688d9cSDavid Howells 6908e688d9cSDavid Howells extern const char *rxrpc_acks(u8 reason); 6918e688d9cSDavid Howells 6928e688d9cSDavid Howells /* 6930d81a51aSDavid Howells * output.c 6940d81a51aSDavid Howells */ 6950d81a51aSDavid Howells extern unsigned int rxrpc_resend_timeout; 6960d81a51aSDavid Howells 697985a5c82SDavid Howells int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); 6980d81a51aSDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 6990d81a51aSDavid Howells 7000d81a51aSDavid Howells /* 701abe89ef0SDavid Howells * peer_event.c 7020d81a51aSDavid Howells */ 703abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 704f66d7490SDavid Howells void rxrpc_peer_error_distributor(struct work_struct *); 7050d81a51aSDavid Howells 7060d81a51aSDavid Howells /* 7070d81a51aSDavid Howells * peer_object.c 7080d81a51aSDavid Howells */ 709be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 710be6e6707SDavid Howells const struct sockaddr_rxrpc *); 711be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 712be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 713be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 714be6e6707SDavid Howells 715be6e6707SDavid Howells static inline void rxrpc_get_peer(struct rxrpc_peer *peer) 716be6e6707SDavid Howells { 717be6e6707SDavid Howells atomic_inc(&peer->usage); 718be6e6707SDavid Howells } 719be6e6707SDavid Howells 720be6e6707SDavid Howells static inline 721be6e6707SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 722be6e6707SDavid Howells { 723be6e6707SDavid Howells return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 724be6e6707SDavid Howells } 725be6e6707SDavid Howells 726be6e6707SDavid Howells extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 727be6e6707SDavid Howells static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 728be6e6707SDavid Howells { 7295627cc8bSDavid Howells if (peer && atomic_dec_and_test(&peer->usage)) 730be6e6707SDavid Howells __rxrpc_put_peer(peer); 731be6e6707SDavid Howells } 7320d81a51aSDavid Howells 7330d81a51aSDavid Howells /* 7340d81a51aSDavid Howells * proc.c 7350d81a51aSDavid Howells */ 7360d81a51aSDavid Howells extern const char *const rxrpc_call_states[]; 7370d81a51aSDavid Howells extern const struct file_operations rxrpc_call_seq_fops; 7380d81a51aSDavid Howells extern const struct file_operations rxrpc_connection_seq_fops; 7390d81a51aSDavid Howells 7400d81a51aSDavid Howells /* 7410d81a51aSDavid Howells * recvmsg.c 7420d81a51aSDavid Howells */ 7430d81a51aSDavid Howells void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 7440d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 7450d81a51aSDavid Howells 7460d81a51aSDavid Howells /* 747648af7fcSDavid Howells * rxkad.c 748648af7fcSDavid Howells */ 749648af7fcSDavid Howells #ifdef CONFIG_RXKAD 750648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 751648af7fcSDavid Howells #endif 752648af7fcSDavid Howells 753648af7fcSDavid Howells /* 7540d81a51aSDavid Howells * security.c 7550d81a51aSDavid Howells */ 7560d81a51aSDavid Howells int __init rxrpc_init_security(void); 7570d81a51aSDavid Howells void rxrpc_exit_security(void); 7580d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 7590d81a51aSDavid Howells int rxrpc_init_server_conn_security(struct rxrpc_connection *); 7600d81a51aSDavid Howells 7610d81a51aSDavid Howells /* 7620d81a51aSDavid Howells * skbuff.c 7630d81a51aSDavid Howells */ 7640d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 765df844fd4SDavid Howells void rxrpc_new_skb(struct sk_buff *); 766df844fd4SDavid Howells void rxrpc_see_skb(struct sk_buff *); 767df844fd4SDavid Howells void rxrpc_get_skb(struct sk_buff *); 768df844fd4SDavid Howells void rxrpc_free_skb(struct sk_buff *); 769df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 7700d81a51aSDavid Howells 7710d81a51aSDavid Howells /* 7725873c083SDavid Howells * sysctl.c 7735873c083SDavid Howells */ 7745873c083SDavid Howells #ifdef CONFIG_SYSCTL 7755873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 7765873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 7775873c083SDavid Howells #else 7785873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 7795873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 7805873c083SDavid Howells #endif 7815873c083SDavid Howells 7825873c083SDavid Howells /* 783be6e6707SDavid Howells * utils.c 784be6e6707SDavid Howells */ 785d991b4a3SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 786be6e6707SDavid Howells 787be6e6707SDavid Howells /* 78817926a79SDavid Howells * debug tracing 78917926a79SDavid Howells */ 79095c96174SEric Dumazet extern unsigned int rxrpc_debug; 79117926a79SDavid Howells 79217926a79SDavid Howells #define dbgprintk(FMT,...) \ 7939f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 79417926a79SDavid Howells 7950dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 7960dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 79717926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 79817926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 79917926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 80017926a79SDavid Howells 80117926a79SDavid Howells 80217926a79SDavid Howells #if defined(__KDEBUG) 80317926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 80417926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 80517926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 80617926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 80717926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 80817926a79SDavid Howells 80917926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 81017926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 81117926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 81217926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 81317926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 81417926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 81517926a79SDavid Howells 81617926a79SDavid Howells #define _enter(FMT,...) \ 81717926a79SDavid Howells do { \ 81817926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 81917926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 82017926a79SDavid Howells } while (0) 82117926a79SDavid Howells 82217926a79SDavid Howells #define _leave(FMT,...) \ 82317926a79SDavid Howells do { \ 82417926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 82517926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 82617926a79SDavid Howells } while (0) 82717926a79SDavid Howells 82817926a79SDavid Howells #define _debug(FMT,...) \ 82917926a79SDavid Howells do { \ 83017926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 83117926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 83217926a79SDavid Howells } while (0) 83317926a79SDavid Howells 83417926a79SDavid Howells #define _proto(FMT,...) \ 83517926a79SDavid Howells do { \ 83617926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 83717926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 83817926a79SDavid Howells } while (0) 83917926a79SDavid Howells 84017926a79SDavid Howells #define _net(FMT,...) \ 84117926a79SDavid Howells do { \ 84217926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 84317926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 84417926a79SDavid Howells } while (0) 84517926a79SDavid Howells 84617926a79SDavid Howells #else 84712fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 84812fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 84912fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 85012fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 85112fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 85217926a79SDavid Howells #endif 85317926a79SDavid Howells 85417926a79SDavid Howells /* 85517926a79SDavid Howells * debug assertion checking 85617926a79SDavid Howells */ 85717926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 85817926a79SDavid Howells 85917926a79SDavid Howells #define ASSERT(X) \ 86017926a79SDavid Howells do { \ 86117926a79SDavid Howells if (unlikely(!(X))) { \ 8629b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 86317926a79SDavid Howells BUG(); \ 86417926a79SDavid Howells } \ 86517926a79SDavid Howells } while (0) 86617926a79SDavid Howells 86717926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 86817926a79SDavid Howells do { \ 8699b6d5398SJoe Perches unsigned long _x = (unsigned long)(X); \ 8709b6d5398SJoe Perches unsigned long _y = (unsigned long)(Y); \ 8719b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 8729b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 8739b6d5398SJoe Perches _x, _x, #OP, _y, _y); \ 87417926a79SDavid Howells BUG(); \ 87517926a79SDavid Howells } \ 87617926a79SDavid Howells } while (0) 87717926a79SDavid Howells 87817926a79SDavid Howells #define ASSERTIF(C, X) \ 87917926a79SDavid Howells do { \ 88017926a79SDavid Howells if (unlikely((C) && !(X))) { \ 8819b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 88217926a79SDavid Howells BUG(); \ 88317926a79SDavid Howells } \ 88417926a79SDavid Howells } while (0) 88517926a79SDavid Howells 88617926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 88717926a79SDavid Howells do { \ 8889b6d5398SJoe Perches unsigned long _x = (unsigned long)(X); \ 8899b6d5398SJoe Perches unsigned long _y = (unsigned long)(Y); \ 8909b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 8919b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 8929b6d5398SJoe Perches _x, _x, #OP, _y, _y); \ 89317926a79SDavid Howells BUG(); \ 89417926a79SDavid Howells } \ 89517926a79SDavid Howells } while (0) 89617926a79SDavid Howells 89717926a79SDavid Howells #else 89817926a79SDavid Howells 89917926a79SDavid Howells #define ASSERT(X) \ 90017926a79SDavid Howells do { \ 90117926a79SDavid Howells } while (0) 90217926a79SDavid Howells 90317926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 90417926a79SDavid Howells do { \ 90517926a79SDavid Howells } while (0) 90617926a79SDavid Howells 90717926a79SDavid Howells #define ASSERTIF(C, X) \ 90817926a79SDavid Howells do { \ 90917926a79SDavid Howells } while (0) 91017926a79SDavid Howells 91117926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 91217926a79SDavid Howells do { \ 91317926a79SDavid Howells } while (0) 91417926a79SDavid Howells 91517926a79SDavid Howells #endif /* __KDEBUGALL */ 91617926a79SDavid Howells 91717926a79SDavid Howells 91817926a79SDavid Howells #define rxrpc_get_call(CALL) \ 91917926a79SDavid Howells do { \ 92017926a79SDavid Howells CHECK_SLAB_OKAY(&(CALL)->usage); \ 92117926a79SDavid Howells if (atomic_inc_return(&(CALL)->usage) == 1) \ 92217926a79SDavid Howells BUG(); \ 92317926a79SDavid Howells } while (0) 92417926a79SDavid Howells 92517926a79SDavid Howells #define rxrpc_put_call(CALL) \ 92617926a79SDavid Howells do { \ 92717926a79SDavid Howells __rxrpc_put_call(CALL); \ 92817926a79SDavid Howells } while (0) 929