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> 13e0e4d82fSDavid Howells #include <net/sock.h> 14be6e6707SDavid Howells #include <net/af_rxrpc.h> 1517926a79SDavid Howells #include <rxrpc/packet.h> 1617926a79SDavid Howells 1717926a79SDavid Howells #if 0 1817926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 1917926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 2017926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 2117926a79SDavid Howells #else 2217926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2317926a79SDavid Howells #endif 2417926a79SDavid Howells 2517926a79SDavid Howells #define FCRYPT_BSIZE 8 2617926a79SDavid Howells struct rxrpc_crypt { 2717926a79SDavid Howells union { 2817926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 2991e916cfSAl Viro __be32 n[2]; 3017926a79SDavid Howells }; 3117926a79SDavid Howells } __attribute__((aligned(8))); 3217926a79SDavid Howells 33651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 34651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 35651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 36651350d1SDavid Howells 37651350d1SDavid Howells #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) 38651350d1SDavid Howells #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->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 */ 14417926a79SDavid Howells void (*prime_packet_security)(struct rxrpc_connection *); 14517926a79SDavid Howells 14617926a79SDavid Howells /* impose security on a packet */ 14717926a79SDavid Howells int (*secure_packet)(const 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 */ 15317926a79SDavid Howells int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, 15417926a79SDavid Howells u32 *); 15517926a79SDavid Howells 15617926a79SDavid Howells /* issue a challenge */ 15717926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 15817926a79SDavid Howells 15917926a79SDavid Howells /* respond to a challenge */ 16017926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 16117926a79SDavid Howells struct sk_buff *, 16217926a79SDavid Howells u32 *); 16317926a79SDavid Howells 16417926a79SDavid Howells /* verify a response */ 16517926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 16617926a79SDavid Howells struct sk_buff *, 16717926a79SDavid Howells u32 *); 16817926a79SDavid Howells 16917926a79SDavid Howells /* clear connection security */ 17017926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 17117926a79SDavid Howells }; 17217926a79SDavid Howells 17317926a79SDavid Howells /* 1744f95dd78SDavid Howells * RxRPC local transport endpoint description 1754f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 1764f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 17717926a79SDavid Howells */ 17817926a79SDavid Howells struct rxrpc_local { 1794f95dd78SDavid Howells struct rcu_head rcu; 1804f95dd78SDavid Howells atomic_t usage; 1814f95dd78SDavid Howells struct list_head link; 18217926a79SDavid Howells struct socket *socket; /* my UDP socket */ 1834f95dd78SDavid Howells struct work_struct processor; 18417926a79SDavid Howells struct list_head services; /* services listening on this endpoint */ 18517926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 18617926a79SDavid Howells struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 18717926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 18844ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 1894f95dd78SDavid Howells struct mutex conn_lock; /* Client connection creation lock */ 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; 20917926a79SDavid Howells spinlock_t lock; /* access lock */ 21095c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 21195c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 21295c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 21317926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 21417926a79SDavid Howells int debug_id; /* debug ID for printks */ 215f66d7490SDavid Howells int error_report; /* Net (+0) or local (+1000000) to distribute */ 216f66d7490SDavid Howells #define RXRPC_LOCAL_ERROR_OFFSET 1000000 21717926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 21817926a79SDavid Howells 21917926a79SDavid Howells /* calculated RTT cache */ 22017926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 22117926a79SDavid Howells suseconds_t rtt; /* current RTT estimate (in uS) */ 22295c96174SEric Dumazet unsigned int rtt_point; /* next entry at which to insert */ 22395c96174SEric Dumazet unsigned int rtt_usage; /* amount of cache actually used */ 22417926a79SDavid Howells suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 22517926a79SDavid Howells }; 22617926a79SDavid Howells 22717926a79SDavid Howells /* 22817926a79SDavid Howells * RxRPC point-to-point transport / connection manager definition 22917926a79SDavid Howells * - handles a bundle of connections between two endpoints 23017926a79SDavid Howells * - matched by { local, peer } 23117926a79SDavid Howells */ 23217926a79SDavid Howells struct rxrpc_transport { 23317926a79SDavid Howells struct rxrpc_local *local; /* local transport endpoint */ 23417926a79SDavid Howells struct rxrpc_peer *peer; /* remote transport endpoint */ 23517926a79SDavid Howells struct rb_root bundles; /* client connection bundles on this transport */ 23617926a79SDavid Howells struct rb_root client_conns; /* client connections on this transport */ 23717926a79SDavid Howells struct rb_root server_conns; /* server connections on this transport */ 23817926a79SDavid Howells struct list_head link; /* link in master session list */ 23922a3f9a2SKsenija Stanojevic unsigned long put_time; /* time at which to reap */ 24017926a79SDavid Howells spinlock_t client_lock; /* client connection allocation lock */ 24117926a79SDavid Howells rwlock_t conn_lock; /* lock for active/dead connections */ 24217926a79SDavid Howells atomic_t usage; 24317926a79SDavid Howells int debug_id; /* debug ID for printks */ 24417926a79SDavid Howells unsigned int conn_idcounter; /* connection ID counter (client) */ 24517926a79SDavid Howells }; 24617926a79SDavid Howells 24717926a79SDavid Howells /* 24817926a79SDavid Howells * RxRPC client connection bundle 24917926a79SDavid Howells * - matched by { transport, service_id, key } 25017926a79SDavid Howells */ 25117926a79SDavid Howells struct rxrpc_conn_bundle { 25217926a79SDavid Howells struct rb_node node; /* node in transport's lookup tree */ 25317926a79SDavid Howells struct list_head unused_conns; /* unused connections in this bundle */ 25417926a79SDavid Howells struct list_head avail_conns; /* available connections in this bundle */ 25517926a79SDavid Howells struct list_head busy_conns; /* busy connections in this bundle */ 25617926a79SDavid Howells struct key *key; /* security for this bundle */ 25717926a79SDavid Howells wait_queue_head_t chanwait; /* wait for channel to become available */ 25817926a79SDavid Howells atomic_t usage; 25917926a79SDavid Howells int debug_id; /* debug ID for printks */ 26017926a79SDavid Howells unsigned short num_conns; /* number of connections in this bundle */ 2610d12f8a4SDavid Howells u16 service_id; /* Service ID for this bundle */ 2624e36a95eSDavid Howells u8 security_ix; /* security type */ 26317926a79SDavid Howells }; 26417926a79SDavid Howells 26517926a79SDavid Howells /* 26619ffa01cSDavid Howells * Keys for matching a connection. 26719ffa01cSDavid Howells */ 26819ffa01cSDavid Howells struct rxrpc_conn_proto { 26919ffa01cSDavid Howells unsigned long hash_key; 27019ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 27119ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 27219ffa01cSDavid Howells u32 cid; /* connection ID */ 27319ffa01cSDavid Howells u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 27419ffa01cSDavid Howells u8 addr_size; /* Size of the address */ 27519ffa01cSDavid Howells sa_family_t family; /* Transport protocol */ 27619ffa01cSDavid Howells __be16 port; /* Peer UDP/UDP6 port */ 27719ffa01cSDavid Howells union { /* Peer address */ 27819ffa01cSDavid Howells struct in_addr ipv4_addr; 27919ffa01cSDavid Howells struct in6_addr ipv6_addr; 28019ffa01cSDavid Howells u32 raw_addr[0]; 28119ffa01cSDavid Howells }; 28219ffa01cSDavid Howells }; 28319ffa01cSDavid Howells 28419ffa01cSDavid Howells struct rxrpc_conn_parameters { 28519ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 28619ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 28719ffa01cSDavid Howells struct key *key; /* Security details */ 28819ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 28919ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 29019ffa01cSDavid Howells u32 security_level; /* Security level selected */ 29119ffa01cSDavid Howells }; 29219ffa01cSDavid Howells 29319ffa01cSDavid Howells /* 29417926a79SDavid Howells * RxRPC connection definition 29517926a79SDavid Howells * - matched by { transport, service_id, conn_id, direction, key } 29617926a79SDavid Howells * - each connection can only handle four simultaneous calls 29717926a79SDavid Howells */ 29817926a79SDavid Howells struct rxrpc_connection { 29917926a79SDavid Howells struct rxrpc_transport *trans; /* transport session */ 30017926a79SDavid Howells struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ 30119ffa01cSDavid Howells struct rxrpc_conn_proto proto; 30219ffa01cSDavid Howells struct rxrpc_conn_parameters params; 30319ffa01cSDavid Howells 30417926a79SDavid Howells struct work_struct processor; /* connection event processor */ 30517926a79SDavid Howells struct rb_node node; /* node in transport's lookup tree */ 30617926a79SDavid Howells struct list_head link; /* link in master connection list */ 30717926a79SDavid Howells struct list_head bundle_link; /* link in bundle */ 30817926a79SDavid Howells struct rb_root calls; /* calls on this connection */ 30917926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 31017926a79SDavid Howells struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ 311648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 31217926a79SDavid Howells struct key *server_key; /* security for this service */ 3131afe593bSHerbert Xu struct crypto_skcipher *cipher; /* encryption handle */ 31417926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 31517926a79SDavid Howells unsigned long events; 31617926a79SDavid Howells #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ 31722a3f9a2SKsenija Stanojevic unsigned long put_time; /* time at which to reap */ 31817926a79SDavid Howells rwlock_t lock; /* access lock */ 31917926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 32017926a79SDavid Howells atomic_t usage; 32117926a79SDavid Howells enum { /* current state of connection */ 32217926a79SDavid Howells RXRPC_CONN_UNUSED, /* - connection not yet attempted */ 32317926a79SDavid Howells RXRPC_CONN_CLIENT, /* - client connection */ 32417926a79SDavid Howells RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ 32517926a79SDavid Howells RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ 32617926a79SDavid Howells RXRPC_CONN_SERVER, /* - server secured connection */ 32717926a79SDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ 32817926a79SDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ 32917926a79SDavid Howells RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ 33017926a79SDavid Howells } state; 331dc44b3a0SDavid Howells u32 local_abort; /* local abort code */ 332dc44b3a0SDavid Howells u32 remote_abort; /* remote abort code */ 333dc44b3a0SDavid Howells int error; /* local error incurred */ 33417926a79SDavid Howells int debug_id; /* debug ID for printks */ 33595c96174SEric Dumazet unsigned int call_counter; /* call ID counter */ 33617926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 33717926a79SDavid Howells atomic_t hi_serial; /* highest serial number received */ 33817926a79SDavid Howells u8 avail_calls; /* number of calls available */ 33917926a79SDavid Howells u8 size_align; /* data size alignment (for security) */ 34017926a79SDavid Howells u8 header_size; /* rxrpc + security header size */ 34117926a79SDavid Howells u8 security_size; /* security header size */ 34217926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 34317926a79SDavid Howells u8 security_ix; /* security type */ 34417926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 34517926a79SDavid Howells }; 34617926a79SDavid Howells 34717926a79SDavid Howells /* 3485b8848d1SDavid Howells * Flags in call->flags. 3495b8848d1SDavid Howells */ 3505b8848d1SDavid Howells enum rxrpc_call_flag { 3515b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 3525b8848d1SDavid Howells RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ 3535b8848d1SDavid Howells RXRPC_CALL_RCVD_LAST, /* all packets received */ 3545b8848d1SDavid Howells RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ 3555b8848d1SDavid Howells RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ 3565b8848d1SDavid Howells RXRPC_CALL_PROC_BUSY, /* the processor is busy */ 3575b8848d1SDavid Howells RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 3585b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 3595b8848d1SDavid Howells RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ 3605b8848d1SDavid Howells }; 3615b8848d1SDavid Howells 3625b8848d1SDavid Howells /* 3635b8848d1SDavid Howells * Events that can be raised on a call. 3645b8848d1SDavid Howells */ 3655b8848d1SDavid Howells enum rxrpc_call_event { 3664c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ 3674c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ 3684c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ 3694c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ 3704c198ad1SDavid Howells RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ 3714c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 3724c198ad1SDavid Howells RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ 3734c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 3744c198ad1SDavid Howells RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ 3754c198ad1SDavid Howells RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ 3764c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 3774c198ad1SDavid Howells RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ 3784c198ad1SDavid Howells RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ 3794c198ad1SDavid Howells RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ 3804c198ad1SDavid Howells RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ 3814c198ad1SDavid Howells RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ 3824c198ad1SDavid Howells RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ 3835b8848d1SDavid Howells }; 3845b8848d1SDavid Howells 3855b8848d1SDavid Howells /* 3865b8848d1SDavid Howells * The states that a call can be in. 3875b8848d1SDavid Howells */ 3885b8848d1SDavid Howells enum rxrpc_call_state { 3895b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 3905b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 3915b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 3925b8848d1SDavid Howells RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 3935b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 3945b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 3955b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 3965b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 3975b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 3985b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 3995b8848d1SDavid Howells RXRPC_CALL_COMPLETE, /* - call completed */ 4005b8848d1SDavid Howells RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 4015b8848d1SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 4025b8848d1SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 4035b8848d1SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 4045b8848d1SDavid Howells RXRPC_CALL_DEAD, /* - call is dead */ 4055b8848d1SDavid Howells NR__RXRPC_CALL_STATES 4065b8848d1SDavid Howells }; 4075b8848d1SDavid Howells 4085b8848d1SDavid Howells /* 40917926a79SDavid Howells * RxRPC call definition 41017926a79SDavid Howells * - matched by { connection, call_id } 41117926a79SDavid Howells */ 41217926a79SDavid Howells struct rxrpc_call { 41317926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 41417926a79SDavid Howells struct rxrpc_sock *socket; /* socket responsible */ 41517926a79SDavid Howells struct timer_list lifetimer; /* lifetime remaining on call */ 41617926a79SDavid Howells struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 41717926a79SDavid Howells struct timer_list ack_timer; /* ACK generation timer */ 41817926a79SDavid Howells struct timer_list resend_timer; /* Tx resend timer */ 41917926a79SDavid Howells struct work_struct destroyer; /* call destroyer */ 42017926a79SDavid Howells struct work_struct processor; /* packet processor and ACK generator */ 42117926a79SDavid Howells struct list_head link; /* link in master call list */ 422f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 42317926a79SDavid Howells struct list_head accept_link; /* calls awaiting acceptance */ 42417926a79SDavid Howells struct rb_node sock_node; /* node in socket call tree */ 42517926a79SDavid Howells struct rb_node conn_node; /* node in connection call tree */ 42617926a79SDavid Howells struct sk_buff_head rx_queue; /* received packets */ 42717926a79SDavid Howells struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 42817926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 42917926a79SDavid Howells wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 43017926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 43117926a79SDavid Howells unsigned long creation_jif; /* time of call creation */ 43217926a79SDavid Howells unsigned long flags; 43317926a79SDavid Howells unsigned long events; 43417926a79SDavid Howells spinlock_t lock; 43517926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 43617926a79SDavid Howells atomic_t usage; 43717926a79SDavid Howells atomic_t sequence; /* Tx data packet sequence counter */ 438dc44b3a0SDavid Howells u32 local_abort; /* local abort code */ 439dc44b3a0SDavid Howells u32 remote_abort; /* remote abort code */ 440f66d7490SDavid Howells int error_report; /* Network error (ICMP/local transport) */ 441f66d7490SDavid Howells int error; /* Local error incurred */ 4425b8848d1SDavid Howells enum rxrpc_call_state state : 8; /* current state of call */ 44317926a79SDavid Howells int debug_id; /* debug ID for printks */ 44417926a79SDavid Howells u8 channel; /* connection channel occupied by this call */ 44517926a79SDavid Howells 44617926a79SDavid Howells /* transmission-phase ACK management */ 4474e36a95eSDavid Howells u8 acks_head; /* offset into window of first entry */ 4484e36a95eSDavid Howells u8 acks_tail; /* offset into window of last entry */ 4494e36a95eSDavid Howells u8 acks_winsz; /* size of un-ACK'd window */ 4504e36a95eSDavid Howells u8 acks_unacked; /* lowest unacked packet in last ACK received */ 45117926a79SDavid Howells int acks_latest; /* serial number of latest ACK received */ 45217926a79SDavid Howells rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 45317926a79SDavid Howells unsigned long *acks_window; /* sent packet window 45417926a79SDavid Howells * - elements are pointers with LSB set if ACK'd 45517926a79SDavid Howells */ 45617926a79SDavid Howells 45717926a79SDavid Howells /* receive-phase ACK management */ 45817926a79SDavid Howells rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 45917926a79SDavid Howells rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 46017926a79SDavid Howells rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 46117926a79SDavid Howells rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 46217926a79SDavid Howells rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 46317926a79SDavid Howells rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 4640d12f8a4SDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 4654e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 4660d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 46717926a79SDavid Howells atomic_t ackr_not_idle; /* number of packets in Rx queue */ 46817926a79SDavid Howells 46917926a79SDavid Howells /* received packet records, 1 bit per record */ 47017926a79SDavid Howells #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 47117926a79SDavid Howells unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 47217926a79SDavid Howells 4737727640cSTim Smith struct hlist_node hash_node; 4747727640cSTim Smith unsigned long hash_key; /* Full hash key */ 4757727640cSTim Smith u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ 4767727640cSTim Smith struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ 47719ffa01cSDavid Howells sa_family_t family; /* Frame protocol */ 4780d12f8a4SDavid Howells u32 call_id; /* call ID on connection */ 4790d12f8a4SDavid Howells u32 cid; /* connection ID plus channel index */ 4800d12f8a4SDavid Howells u32 epoch; /* epoch of this connection */ 4810d12f8a4SDavid Howells u16 service_id; /* service ID */ 4827727640cSTim Smith union { /* Peer IP address for hashing */ 4837727640cSTim Smith __be32 ipv4_addr; 4847727640cSTim Smith __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ 4857727640cSTim Smith } peer_ip; 48617926a79SDavid Howells }; 48717926a79SDavid Howells 48817926a79SDavid Howells /* 48917926a79SDavid Howells * locally abort an RxRPC call 49017926a79SDavid Howells */ 49117926a79SDavid Howells static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 49217926a79SDavid Howells { 49317926a79SDavid Howells write_lock_bh(&call->state_lock); 49417926a79SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 495dc44b3a0SDavid Howells call->local_abort = abort_code; 49617926a79SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 4974c198ad1SDavid Howells set_bit(RXRPC_CALL_EV_ABORT, &call->events); 49817926a79SDavid Howells } 49917926a79SDavid Howells write_unlock_bh(&call->state_lock); 50017926a79SDavid Howells } 50117926a79SDavid Howells 50217926a79SDavid Howells /* 503651350d1SDavid Howells * af_rxrpc.c 50417926a79SDavid Howells */ 505651350d1SDavid Howells extern atomic_t rxrpc_n_skbs; 5060d12f8a4SDavid Howells extern u32 rxrpc_epoch; 507651350d1SDavid Howells extern atomic_t rxrpc_debug_id; 508651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 50917926a79SDavid Howells 51019ffa01cSDavid Howells extern struct rxrpc_transport *rxrpc_name_to_transport(struct rxrpc_conn_parameters *, 5112341e077SDavid Howells struct sockaddr *, 51219ffa01cSDavid Howells int, gfp_t); 5132341e077SDavid Howells 51417926a79SDavid Howells /* 5150d81a51aSDavid Howells * call_accept.c 51617926a79SDavid Howells */ 5174f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 518c1b1203dSJoe Perches struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 519c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 52017926a79SDavid Howells 52117926a79SDavid Howells /* 5220d81a51aSDavid Howells * call_event.c 52317926a79SDavid Howells */ 5240d12f8a4SDavid Howells void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 5250d12f8a4SDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 526c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 52717926a79SDavid Howells 52817926a79SDavid Howells /* 5290d81a51aSDavid Howells * call_object.c 53017926a79SDavid Howells */ 531dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 532dad8aff7SDavid Howells extern unsigned int rxrpc_dead_call_expiry; 53317926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 53417926a79SDavid Howells extern struct list_head rxrpc_calls; 53517926a79SDavid Howells extern rwlock_t rxrpc_call_lock; 53617926a79SDavid Howells 5370d12f8a4SDavid Howells struct rxrpc_call *rxrpc_find_call_hash(struct rxrpc_host_header *, 5380d12f8a4SDavid Howells void *, sa_family_t, const void *); 5392341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 5402341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 54119ffa01cSDavid Howells struct rxrpc_conn_parameters *, 54217926a79SDavid Howells struct rxrpc_transport *, 54317926a79SDavid Howells struct rxrpc_conn_bundle *, 5442341e077SDavid Howells unsigned long, gfp_t); 545c1b1203dSJoe Perches struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 54617926a79SDavid Howells struct rxrpc_connection *, 54742886ffeSDavid Howells struct sk_buff *); 548c1b1203dSJoe Perches void rxrpc_release_call(struct rxrpc_call *); 549c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 550c1b1203dSJoe Perches void __rxrpc_put_call(struct rxrpc_call *); 551c1b1203dSJoe Perches void __exit rxrpc_destroy_all_calls(void); 55217926a79SDavid Howells 55317926a79SDavid Howells /* 5540d81a51aSDavid Howells * conn_event.c 5550d81a51aSDavid Howells */ 5560d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 5570d81a51aSDavid Howells void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 5584f95dd78SDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 5590d81a51aSDavid Howells 5600d81a51aSDavid Howells /* 5610d81a51aSDavid Howells * conn_object.c 56217926a79SDavid Howells */ 563dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 56417926a79SDavid Howells extern struct list_head rxrpc_connections; 56517926a79SDavid Howells extern rwlock_t rxrpc_connection_lock; 56617926a79SDavid Howells 567c1b1203dSJoe Perches struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, 56817926a79SDavid Howells struct rxrpc_transport *, 5690d12f8a4SDavid Howells struct key *, u16, gfp_t); 570c1b1203dSJoe Perches void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); 57119ffa01cSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_conn_parameters *, 57219ffa01cSDavid Howells struct rxrpc_transport *, struct rxrpc_conn_bundle *, 57319ffa01cSDavid Howells struct rxrpc_call *, gfp_t); 574c1b1203dSJoe Perches void rxrpc_put_connection(struct rxrpc_connection *); 575c1b1203dSJoe Perches void __exit rxrpc_destroy_all_connections(void); 576c1b1203dSJoe Perches struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, 57742886ffeSDavid Howells struct sk_buff *); 57817926a79SDavid Howells extern struct rxrpc_connection * 57942886ffeSDavid Howells rxrpc_incoming_connection(struct rxrpc_transport *, struct sk_buff *); 58017926a79SDavid Howells 58119ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 58219ffa01cSDavid Howells { 58319ffa01cSDavid Howells return conn->out_clientflag; 58419ffa01cSDavid Howells } 58519ffa01cSDavid Howells 58619ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 58719ffa01cSDavid Howells { 58819ffa01cSDavid Howells return conn->proto.in_clientflag; 58919ffa01cSDavid Howells } 59019ffa01cSDavid Howells 59117926a79SDavid Howells /* 5920d81a51aSDavid Howells * input.c 59317926a79SDavid Howells */ 594676d2369SDavid S. Miller void rxrpc_data_ready(struct sock *); 595c1b1203dSJoe Perches int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 596c1b1203dSJoe Perches void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 59717926a79SDavid Howells 59817926a79SDavid Howells /* 5990d81a51aSDavid Howells * insecure.c 60017926a79SDavid Howells */ 6010d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 60217926a79SDavid Howells 60317926a79SDavid Howells /* 6040d81a51aSDavid Howells * key.c 60517926a79SDavid Howells */ 60617926a79SDavid Howells extern struct key_type key_type_rxrpc; 60717926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 60817926a79SDavid Howells 609c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 610c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 611c1b1203dSJoe Perches int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 612c1b1203dSJoe Perches u32); 61317926a79SDavid Howells 61417926a79SDavid Howells /* 61587563616SDavid Howells * local_event.c 61687563616SDavid Howells */ 6174f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 61887563616SDavid Howells 61987563616SDavid Howells /* 6200d81a51aSDavid Howells * local_object.c 62117926a79SDavid Howells */ 6224f95dd78SDavid Howells struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); 6234f95dd78SDavid Howells void __rxrpc_put_local(struct rxrpc_local *); 6240d81a51aSDavid Howells void __exit rxrpc_destroy_all_locals(void); 625e0e4d82fSDavid Howells 6264f95dd78SDavid Howells static inline void rxrpc_get_local(struct rxrpc_local *local) 6274f95dd78SDavid Howells { 6284f95dd78SDavid Howells atomic_inc(&local->usage); 6294f95dd78SDavid Howells } 6304f95dd78SDavid Howells 6314f95dd78SDavid Howells static inline 6324f95dd78SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 6334f95dd78SDavid Howells { 6344f95dd78SDavid Howells return atomic_inc_not_zero(&local->usage) ? local : NULL; 6354f95dd78SDavid Howells } 6364f95dd78SDavid Howells 6374f95dd78SDavid Howells static inline void rxrpc_put_local(struct rxrpc_local *local) 6384f95dd78SDavid Howells { 6394f95dd78SDavid Howells if (atomic_dec_and_test(&local->usage)) 6404f95dd78SDavid Howells __rxrpc_put_local(local); 6414f95dd78SDavid Howells } 6424f95dd78SDavid Howells 643e0e4d82fSDavid Howells /* 6448e688d9cSDavid Howells * misc.c 6458e688d9cSDavid Howells */ 6460e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 6478e688d9cSDavid Howells extern unsigned int rxrpc_requested_ack_delay; 6488e688d9cSDavid Howells extern unsigned int rxrpc_soft_ack_delay; 6498e688d9cSDavid Howells extern unsigned int rxrpc_idle_ack_delay; 6508e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 6518e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 6528e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 6538e688d9cSDavid Howells 6545b3e87f1SDavid Howells extern const char *const rxrpc_pkts[]; 6558e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 6568e688d9cSDavid Howells 6578e688d9cSDavid Howells extern const char *rxrpc_acks(u8 reason); 6588e688d9cSDavid Howells 6598e688d9cSDavid Howells /* 6600d81a51aSDavid Howells * output.c 6610d81a51aSDavid Howells */ 6620d81a51aSDavid Howells extern unsigned int rxrpc_resend_timeout; 6630d81a51aSDavid Howells 6640d81a51aSDavid Howells int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); 6650d81a51aSDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 6660d81a51aSDavid Howells 6670d81a51aSDavid Howells /* 668abe89ef0SDavid Howells * peer_event.c 6690d81a51aSDavid Howells */ 670abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 671f66d7490SDavid Howells void rxrpc_peer_error_distributor(struct work_struct *); 6720d81a51aSDavid Howells 6730d81a51aSDavid Howells /* 6740d81a51aSDavid Howells * peer_object.c 6750d81a51aSDavid Howells */ 676be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 677be6e6707SDavid Howells const struct sockaddr_rxrpc *); 678be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 679be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 680be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 681be6e6707SDavid Howells 682be6e6707SDavid Howells static inline void rxrpc_get_peer(struct rxrpc_peer *peer) 683be6e6707SDavid Howells { 684be6e6707SDavid Howells atomic_inc(&peer->usage); 685be6e6707SDavid Howells } 686be6e6707SDavid Howells 687be6e6707SDavid Howells static inline 688be6e6707SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 689be6e6707SDavid Howells { 690be6e6707SDavid Howells return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 691be6e6707SDavid Howells } 692be6e6707SDavid Howells 693be6e6707SDavid Howells extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 694be6e6707SDavid Howells static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 695be6e6707SDavid Howells { 696be6e6707SDavid Howells if (atomic_dec_and_test(&peer->usage)) 697be6e6707SDavid Howells __rxrpc_put_peer(peer); 698be6e6707SDavid Howells } 6990d81a51aSDavid Howells 7000d81a51aSDavid Howells /* 7010d81a51aSDavid Howells * proc.c 7020d81a51aSDavid Howells */ 7030d81a51aSDavid Howells extern const char *const rxrpc_call_states[]; 7040d81a51aSDavid Howells extern const struct file_operations rxrpc_call_seq_fops; 7050d81a51aSDavid Howells extern const struct file_operations rxrpc_connection_seq_fops; 7060d81a51aSDavid Howells 7070d81a51aSDavid Howells /* 7080d81a51aSDavid Howells * recvmsg.c 7090d81a51aSDavid Howells */ 7100d81a51aSDavid Howells void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 7110d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 7120d81a51aSDavid Howells 7130d81a51aSDavid Howells /* 714648af7fcSDavid Howells * rxkad.c 715648af7fcSDavid Howells */ 716648af7fcSDavid Howells #ifdef CONFIG_RXKAD 717648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 718648af7fcSDavid Howells #endif 719648af7fcSDavid Howells 720648af7fcSDavid Howells /* 7210d81a51aSDavid Howells * security.c 7220d81a51aSDavid Howells */ 7230d81a51aSDavid Howells int __init rxrpc_init_security(void); 7240d81a51aSDavid Howells void rxrpc_exit_security(void); 7250d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 7260d81a51aSDavid Howells int rxrpc_init_server_conn_security(struct rxrpc_connection *); 7270d81a51aSDavid Howells 7280d81a51aSDavid Howells /* 7290d81a51aSDavid Howells * skbuff.c 7300d81a51aSDavid Howells */ 7310d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 7320d81a51aSDavid Howells 7330d81a51aSDavid Howells /* 7345873c083SDavid Howells * sysctl.c 7355873c083SDavid Howells */ 7365873c083SDavid Howells #ifdef CONFIG_SYSCTL 7375873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 7385873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 7395873c083SDavid Howells #else 7405873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 7415873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 7425873c083SDavid Howells #endif 7435873c083SDavid Howells 7445873c083SDavid Howells /* 7450d81a51aSDavid Howells * transport.c 7460d81a51aSDavid Howells */ 7470d81a51aSDavid Howells extern unsigned int rxrpc_transport_expiry; 7480d81a51aSDavid Howells 7490d81a51aSDavid Howells struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, 7500d81a51aSDavid Howells struct rxrpc_peer *, gfp_t); 7510d81a51aSDavid Howells void rxrpc_put_transport(struct rxrpc_transport *); 7520d81a51aSDavid Howells void __exit rxrpc_destroy_all_transports(void); 7530d81a51aSDavid Howells struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, 7540d81a51aSDavid Howells struct rxrpc_peer *); 7550d81a51aSDavid Howells 7560d81a51aSDavid Howells /* 757be6e6707SDavid Howells * utils.c 758be6e6707SDavid Howells */ 759be6e6707SDavid Howells void rxrpc_get_addr_from_skb(struct rxrpc_local *, const struct sk_buff *, 760be6e6707SDavid Howells struct sockaddr_rxrpc *); 761be6e6707SDavid Howells 762be6e6707SDavid Howells /* 76317926a79SDavid Howells * debug tracing 76417926a79SDavid Howells */ 76595c96174SEric Dumazet extern unsigned int rxrpc_debug; 76617926a79SDavid Howells 76717926a79SDavid Howells #define dbgprintk(FMT,...) \ 7689f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 76917926a79SDavid Howells 7700dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 7710dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 77217926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 77317926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 77417926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 77517926a79SDavid Howells 77617926a79SDavid Howells 77717926a79SDavid Howells #if defined(__KDEBUG) 77817926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 77917926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 78017926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 78117926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 78217926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 78317926a79SDavid Howells 78417926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 78517926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 78617926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 78717926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 78817926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 78917926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 79017926a79SDavid Howells 79117926a79SDavid Howells #define _enter(FMT,...) \ 79217926a79SDavid Howells do { \ 79317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 79417926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 79517926a79SDavid Howells } while (0) 79617926a79SDavid Howells 79717926a79SDavid Howells #define _leave(FMT,...) \ 79817926a79SDavid Howells do { \ 79917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 80017926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 80117926a79SDavid Howells } while (0) 80217926a79SDavid Howells 80317926a79SDavid Howells #define _debug(FMT,...) \ 80417926a79SDavid Howells do { \ 80517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 80617926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 80717926a79SDavid Howells } while (0) 80817926a79SDavid Howells 80917926a79SDavid Howells #define _proto(FMT,...) \ 81017926a79SDavid Howells do { \ 81117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 81217926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 81317926a79SDavid Howells } while (0) 81417926a79SDavid Howells 81517926a79SDavid Howells #define _net(FMT,...) \ 81617926a79SDavid Howells do { \ 81717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 81817926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 81917926a79SDavid Howells } while (0) 82017926a79SDavid Howells 82117926a79SDavid Howells #else 82212fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 82312fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 82412fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 82512fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 82612fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 82717926a79SDavid Howells #endif 82817926a79SDavid Howells 82917926a79SDavid Howells /* 83017926a79SDavid Howells * debug assertion checking 83117926a79SDavid Howells */ 83217926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 83317926a79SDavid Howells 83417926a79SDavid Howells #define ASSERT(X) \ 83517926a79SDavid Howells do { \ 83617926a79SDavid Howells if (unlikely(!(X))) { \ 8379b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 83817926a79SDavid Howells BUG(); \ 83917926a79SDavid Howells } \ 84017926a79SDavid Howells } while (0) 84117926a79SDavid Howells 84217926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 84317926a79SDavid Howells do { \ 8449b6d5398SJoe Perches unsigned long _x = (unsigned long)(X); \ 8459b6d5398SJoe Perches unsigned long _y = (unsigned long)(Y); \ 8469b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 8479b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 8489b6d5398SJoe Perches _x, _x, #OP, _y, _y); \ 84917926a79SDavid Howells BUG(); \ 85017926a79SDavid Howells } \ 85117926a79SDavid Howells } while (0) 85217926a79SDavid Howells 85317926a79SDavid Howells #define ASSERTIF(C, X) \ 85417926a79SDavid Howells do { \ 85517926a79SDavid Howells if (unlikely((C) && !(X))) { \ 8569b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 85717926a79SDavid Howells BUG(); \ 85817926a79SDavid Howells } \ 85917926a79SDavid Howells } while (0) 86017926a79SDavid Howells 86117926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 86217926a79SDavid Howells do { \ 8639b6d5398SJoe Perches unsigned long _x = (unsigned long)(X); \ 8649b6d5398SJoe Perches unsigned long _y = (unsigned long)(Y); \ 8659b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 8669b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 8679b6d5398SJoe Perches _x, _x, #OP, _y, _y); \ 86817926a79SDavid Howells BUG(); \ 86917926a79SDavid Howells } \ 87017926a79SDavid Howells } while (0) 87117926a79SDavid Howells 87217926a79SDavid Howells #else 87317926a79SDavid Howells 87417926a79SDavid Howells #define ASSERT(X) \ 87517926a79SDavid Howells do { \ 87617926a79SDavid Howells } while (0) 87717926a79SDavid Howells 87817926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 87917926a79SDavid Howells do { \ 88017926a79SDavid Howells } while (0) 88117926a79SDavid Howells 88217926a79SDavid Howells #define ASSERTIF(C, X) \ 88317926a79SDavid Howells do { \ 88417926a79SDavid Howells } while (0) 88517926a79SDavid Howells 88617926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 88717926a79SDavid Howells do { \ 88817926a79SDavid Howells } while (0) 88917926a79SDavid Howells 89017926a79SDavid Howells #endif /* __KDEBUGALL */ 89117926a79SDavid Howells 89217926a79SDavid Howells /* 89317926a79SDavid Howells * socket buffer accounting / leak finding 89417926a79SDavid Howells */ 89517926a79SDavid Howells static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 89617926a79SDavid Howells { 89717926a79SDavid Howells //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 89817926a79SDavid Howells //atomic_inc(&rxrpc_n_skbs); 89917926a79SDavid Howells } 90017926a79SDavid Howells 90117926a79SDavid Howells #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 90217926a79SDavid Howells 90317926a79SDavid Howells static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 90417926a79SDavid Howells { 90517926a79SDavid Howells //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 90617926a79SDavid Howells //atomic_dec(&rxrpc_n_skbs); 90717926a79SDavid Howells } 90817926a79SDavid Howells 90917926a79SDavid Howells #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 91017926a79SDavid Howells 91117926a79SDavid Howells static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 91217926a79SDavid Howells { 91317926a79SDavid Howells if (skb) { 91417926a79SDavid Howells CHECK_SLAB_OKAY(&skb->users); 91517926a79SDavid Howells //_net("free skb %p %s [%d]", 91617926a79SDavid Howells // skb, fn, atomic_read(&rxrpc_n_skbs)); 91717926a79SDavid Howells //atomic_dec(&rxrpc_n_skbs); 91817926a79SDavid Howells kfree_skb(skb); 91917926a79SDavid Howells } 92017926a79SDavid Howells } 92117926a79SDavid Howells 92217926a79SDavid Howells #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 92317926a79SDavid Howells 92417926a79SDavid Howells static inline void rxrpc_purge_queue(struct sk_buff_head *list) 92517926a79SDavid Howells { 92617926a79SDavid Howells struct sk_buff *skb; 92717926a79SDavid Howells while ((skb = skb_dequeue((list))) != NULL) 92817926a79SDavid Howells rxrpc_free_skb(skb); 92917926a79SDavid Howells } 93017926a79SDavid Howells 93117926a79SDavid Howells #define rxrpc_get_call(CALL) \ 93217926a79SDavid Howells do { \ 93317926a79SDavid Howells CHECK_SLAB_OKAY(&(CALL)->usage); \ 93417926a79SDavid Howells if (atomic_inc_return(&(CALL)->usage) == 1) \ 93517926a79SDavid Howells BUG(); \ 93617926a79SDavid Howells } while (0) 93717926a79SDavid Howells 93817926a79SDavid Howells #define rxrpc_put_call(CALL) \ 93917926a79SDavid Howells do { \ 94017926a79SDavid Howells __rxrpc_put_call(CALL); \ 94117926a79SDavid Howells } while (0) 942