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 1217926a79SDavid Howells #include <rxrpc/packet.h> 1317926a79SDavid Howells 1417926a79SDavid Howells #if 0 1517926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 1617926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 1717926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 1817926a79SDavid Howells #else 1917926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2017926a79SDavid Howells #endif 2117926a79SDavid Howells 2217926a79SDavid Howells #define FCRYPT_BSIZE 8 2317926a79SDavid Howells struct rxrpc_crypt { 2417926a79SDavid Howells union { 2517926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 2691e916cfSAl Viro __be32 n[2]; 2717926a79SDavid Howells }; 2817926a79SDavid Howells } __attribute__((aligned(8))); 2917926a79SDavid Howells 30651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 31651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 32651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 33651350d1SDavid Howells 34651350d1SDavid Howells #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) 35651350d1SDavid Howells #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor) 3617926a79SDavid Howells 3717926a79SDavid Howells /* 3817926a79SDavid Howells * sk_state for RxRPC sockets 3917926a79SDavid Howells */ 4017926a79SDavid Howells enum { 4117926a79SDavid Howells RXRPC_UNCONNECTED = 0, 4217926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 4317926a79SDavid Howells RXRPC_CLIENT_CONNECTED, /* client is connected */ 4417926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 4517926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 4617926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 4717926a79SDavid Howells }; 4817926a79SDavid Howells 4917926a79SDavid Howells /* 5017926a79SDavid Howells * RxRPC socket definition 5117926a79SDavid Howells */ 5217926a79SDavid Howells struct rxrpc_sock { 5317926a79SDavid Howells /* WARNING: sk has to be the first member */ 5417926a79SDavid Howells struct sock sk; 55651350d1SDavid Howells rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ 5617926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 5717926a79SDavid Howells struct rxrpc_transport *trans; /* transport handler */ 5817926a79SDavid Howells struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ 5917926a79SDavid Howells struct rxrpc_connection *conn; /* exclusive virtual connection */ 6017926a79SDavid Howells struct list_head listen_link; /* link in the local endpoint's listen list */ 6117926a79SDavid Howells struct list_head secureq; /* calls awaiting connection security clearance */ 6217926a79SDavid Howells struct list_head acceptq; /* calls awaiting acceptance */ 6317926a79SDavid Howells struct key *key; /* security for this socket */ 6417926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 6517926a79SDavid Howells struct rb_root calls; /* outstanding calls on this socket */ 6617926a79SDavid Howells unsigned long flags; 6717926a79SDavid Howells #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ 6817926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 6917926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 7017926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 7117926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 7217926a79SDavid Howells sa_family_t proto; /* protocol created with */ 7317926a79SDavid Howells }; 7417926a79SDavid Howells 7517926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 7617926a79SDavid Howells 7717926a79SDavid Howells /* 780d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 790d12f8a4SDavid Howells */ 800d12f8a4SDavid Howells struct rxrpc_host_header { 810d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 820d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 830d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 840d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 850d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 860d12f8a4SDavid Howells u8 type; /* packet type */ 870d12f8a4SDavid Howells u8 flags; /* packet flags */ 880d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 890d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 900d12f8a4SDavid Howells union { 910d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 920d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 930d12f8a4SDavid Howells }; 940d12f8a4SDavid Howells u16 serviceId; /* service ID */ 950d12f8a4SDavid Howells } __packed; 960d12f8a4SDavid Howells 970d12f8a4SDavid Howells /* 9817926a79SDavid Howells * RxRPC socket buffer private variables 9917926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 10017926a79SDavid Howells */ 10117926a79SDavid Howells struct rxrpc_skb_priv { 10217926a79SDavid Howells struct rxrpc_call *call; /* call with which associated */ 10317926a79SDavid Howells unsigned long resend_at; /* time in jiffies at which to resend */ 10417926a79SDavid Howells union { 10595c96174SEric Dumazet unsigned int offset; /* offset into buffer of next read */ 10617926a79SDavid Howells int remain; /* amount of space remaining for next write */ 10717926a79SDavid Howells u32 error; /* network error code */ 10817926a79SDavid Howells bool need_resend; /* T if needs resending */ 10917926a79SDavid Howells }; 11017926a79SDavid Howells 1110d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 11217926a79SDavid Howells }; 11317926a79SDavid Howells 11417926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 11517926a79SDavid Howells 11617926a79SDavid Howells enum rxrpc_command { 11717926a79SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 11817926a79SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 11917926a79SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 12017926a79SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 12117926a79SDavid Howells }; 12217926a79SDavid Howells 12317926a79SDavid Howells /* 12417926a79SDavid Howells * RxRPC security module interface 12517926a79SDavid Howells */ 12617926a79SDavid Howells struct rxrpc_security { 12717926a79SDavid Howells struct module *owner; /* providing module */ 12817926a79SDavid Howells struct list_head link; /* link in master list */ 12917926a79SDavid Howells const char *name; /* name of this service */ 13017926a79SDavid Howells u8 security_index; /* security type provided */ 13117926a79SDavid Howells 13217926a79SDavid Howells /* initialise a connection's security */ 13317926a79SDavid Howells int (*init_connection_security)(struct rxrpc_connection *); 13417926a79SDavid Howells 13517926a79SDavid Howells /* prime a connection's packet security */ 13617926a79SDavid Howells void (*prime_packet_security)(struct rxrpc_connection *); 13717926a79SDavid Howells 13817926a79SDavid Howells /* impose security on a packet */ 13917926a79SDavid Howells int (*secure_packet)(const struct rxrpc_call *, 14017926a79SDavid Howells struct sk_buff *, 14117926a79SDavid Howells size_t, 14217926a79SDavid Howells void *); 14317926a79SDavid Howells 14417926a79SDavid Howells /* verify the security on a received packet */ 14517926a79SDavid Howells int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, 14617926a79SDavid Howells u32 *); 14717926a79SDavid Howells 14817926a79SDavid Howells /* issue a challenge */ 14917926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 15017926a79SDavid Howells 15117926a79SDavid Howells /* respond to a challenge */ 15217926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 15317926a79SDavid Howells struct sk_buff *, 15417926a79SDavid Howells u32 *); 15517926a79SDavid Howells 15617926a79SDavid Howells /* verify a response */ 15717926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 15817926a79SDavid Howells struct sk_buff *, 15917926a79SDavid Howells u32 *); 16017926a79SDavid Howells 16117926a79SDavid Howells /* clear connection security */ 16217926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 16317926a79SDavid Howells }; 16417926a79SDavid Howells 16517926a79SDavid Howells /* 16617926a79SDavid Howells * RxRPC local transport endpoint definition 16717926a79SDavid Howells * - matched by local port, address and protocol type 16817926a79SDavid Howells */ 16917926a79SDavid Howells struct rxrpc_local { 17017926a79SDavid Howells struct socket *socket; /* my UDP socket */ 17117926a79SDavid Howells struct work_struct destroyer; /* endpoint destroyer */ 17217926a79SDavid Howells struct work_struct acceptor; /* incoming call processor */ 17317926a79SDavid Howells struct work_struct rejecter; /* packet reject writer */ 17444ba0698SDavid Howells struct work_struct event_processor; /* endpoint event processor */ 17517926a79SDavid Howells struct list_head services; /* services listening on this endpoint */ 17617926a79SDavid Howells struct list_head link; /* link in endpoint list */ 17717926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 17817926a79SDavid Howells struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ 17917926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 18044ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 18117926a79SDavid Howells spinlock_t lock; /* access lock */ 18217926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 18317926a79SDavid Howells atomic_t usage; 18417926a79SDavid Howells int debug_id; /* debug ID for printks */ 18517926a79SDavid Howells volatile char error_rcvd; /* T if received ICMP error outstanding */ 18617926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 18717926a79SDavid Howells }; 18817926a79SDavid Howells 18917926a79SDavid Howells /* 19017926a79SDavid Howells * RxRPC remote transport endpoint definition 19117926a79SDavid Howells * - matched by remote port, address and protocol type 19217926a79SDavid Howells * - holds the connection ID counter for connections between the two endpoints 19317926a79SDavid Howells */ 19417926a79SDavid Howells struct rxrpc_peer { 19517926a79SDavid Howells struct work_struct destroyer; /* peer destroyer */ 19617926a79SDavid Howells struct list_head link; /* link in master peer list */ 19717926a79SDavid Howells struct list_head error_targets; /* targets for net error distribution */ 19817926a79SDavid Howells spinlock_t lock; /* access lock */ 19917926a79SDavid Howells atomic_t usage; 20095c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 20195c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 20295c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 20317926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 20417926a79SDavid Howells int debug_id; /* debug ID for printks */ 20517926a79SDavid Howells int net_error; /* network error distributed */ 20617926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 20717926a79SDavid Howells 20817926a79SDavid Howells /* calculated RTT cache */ 20917926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 21017926a79SDavid Howells suseconds_t rtt; /* current RTT estimate (in uS) */ 21195c96174SEric Dumazet unsigned int rtt_point; /* next entry at which to insert */ 21295c96174SEric Dumazet unsigned int rtt_usage; /* amount of cache actually used */ 21317926a79SDavid Howells suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ 21417926a79SDavid Howells }; 21517926a79SDavid Howells 21617926a79SDavid Howells /* 21717926a79SDavid Howells * RxRPC point-to-point transport / connection manager definition 21817926a79SDavid Howells * - handles a bundle of connections between two endpoints 21917926a79SDavid Howells * - matched by { local, peer } 22017926a79SDavid Howells */ 22117926a79SDavid Howells struct rxrpc_transport { 22217926a79SDavid Howells struct rxrpc_local *local; /* local transport endpoint */ 22317926a79SDavid Howells struct rxrpc_peer *peer; /* remote transport endpoint */ 22417926a79SDavid Howells struct work_struct error_handler; /* network error distributor */ 22517926a79SDavid Howells struct rb_root bundles; /* client connection bundles on this transport */ 22617926a79SDavid Howells struct rb_root client_conns; /* client connections on this transport */ 22717926a79SDavid Howells struct rb_root server_conns; /* server connections on this transport */ 22817926a79SDavid Howells struct list_head link; /* link in master session list */ 22917926a79SDavid Howells struct sk_buff_head error_queue; /* error packets awaiting processing */ 23022a3f9a2SKsenija Stanojevic unsigned long put_time; /* time at which to reap */ 23117926a79SDavid Howells spinlock_t client_lock; /* client connection allocation lock */ 23217926a79SDavid Howells rwlock_t conn_lock; /* lock for active/dead connections */ 23317926a79SDavid Howells atomic_t usage; 23417926a79SDavid Howells int debug_id; /* debug ID for printks */ 23517926a79SDavid Howells unsigned int conn_idcounter; /* connection ID counter (client) */ 23617926a79SDavid Howells }; 23717926a79SDavid Howells 23817926a79SDavid Howells /* 23917926a79SDavid Howells * RxRPC client connection bundle 24017926a79SDavid Howells * - matched by { transport, service_id, key } 24117926a79SDavid Howells */ 24217926a79SDavid Howells struct rxrpc_conn_bundle { 24317926a79SDavid Howells struct rb_node node; /* node in transport's lookup tree */ 24417926a79SDavid Howells struct list_head unused_conns; /* unused connections in this bundle */ 24517926a79SDavid Howells struct list_head avail_conns; /* available connections in this bundle */ 24617926a79SDavid Howells struct list_head busy_conns; /* busy connections in this bundle */ 24717926a79SDavid Howells struct key *key; /* security for this bundle */ 24817926a79SDavid Howells wait_queue_head_t chanwait; /* wait for channel to become available */ 24917926a79SDavid Howells atomic_t usage; 25017926a79SDavid Howells int debug_id; /* debug ID for printks */ 25117926a79SDavid Howells unsigned short num_conns; /* number of connections in this bundle */ 2520d12f8a4SDavid Howells u16 service_id; /* Service ID for this bundle */ 2534e36a95eSDavid Howells u8 security_ix; /* security type */ 25417926a79SDavid Howells }; 25517926a79SDavid Howells 25617926a79SDavid Howells /* 25717926a79SDavid Howells * RxRPC connection definition 25817926a79SDavid Howells * - matched by { transport, service_id, conn_id, direction, key } 25917926a79SDavid Howells * - each connection can only handle four simultaneous calls 26017926a79SDavid Howells */ 26117926a79SDavid Howells struct rxrpc_connection { 26217926a79SDavid Howells struct rxrpc_transport *trans; /* transport session */ 26317926a79SDavid Howells struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ 26417926a79SDavid Howells struct work_struct processor; /* connection event processor */ 26517926a79SDavid Howells struct rb_node node; /* node in transport's lookup tree */ 26617926a79SDavid Howells struct list_head link; /* link in master connection list */ 26717926a79SDavid Howells struct list_head bundle_link; /* link in bundle */ 26817926a79SDavid Howells struct rb_root calls; /* calls on this connection */ 26917926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 27017926a79SDavid Howells struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ 27117926a79SDavid Howells struct rxrpc_security *security; /* applied security module */ 27217926a79SDavid Howells struct key *key; /* security for this connection (client) */ 27317926a79SDavid Howells struct key *server_key; /* security for this service */ 27417926a79SDavid Howells struct crypto_blkcipher *cipher; /* encryption handle */ 27517926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 27617926a79SDavid Howells unsigned long events; 27717926a79SDavid Howells #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ 27822a3f9a2SKsenija Stanojevic unsigned long put_time; /* time at which to reap */ 27917926a79SDavid Howells rwlock_t lock; /* access lock */ 28017926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 28117926a79SDavid Howells atomic_t usage; 28217926a79SDavid Howells enum { /* current state of connection */ 28317926a79SDavid Howells RXRPC_CONN_UNUSED, /* - connection not yet attempted */ 28417926a79SDavid Howells RXRPC_CONN_CLIENT, /* - client connection */ 28517926a79SDavid Howells RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ 28617926a79SDavid Howells RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ 28717926a79SDavid Howells RXRPC_CONN_SERVER, /* - server secured connection */ 28817926a79SDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ 28917926a79SDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ 29017926a79SDavid Howells RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ 29117926a79SDavid Howells } state; 29217926a79SDavid Howells int error; /* error code for local abort */ 29317926a79SDavid Howells int debug_id; /* debug ID for printks */ 29495c96174SEric Dumazet unsigned int call_counter; /* call ID counter */ 29517926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 29617926a79SDavid Howells atomic_t hi_serial; /* highest serial number received */ 29717926a79SDavid Howells u8 avail_calls; /* number of calls available */ 29817926a79SDavid Howells u8 size_align; /* data size alignment (for security) */ 29917926a79SDavid Howells u8 header_size; /* rxrpc + security header size */ 30017926a79SDavid Howells u8 security_size; /* security header size */ 30117926a79SDavid Howells u32 security_level; /* security level negotiated */ 30217926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 3030d12f8a4SDavid Howells u32 epoch; /* epoch of this connection */ 3040d12f8a4SDavid Howells u32 cid; /* connection ID */ 3050d12f8a4SDavid Howells u16 service_id; /* service ID for this connection */ 30617926a79SDavid Howells u8 security_ix; /* security type */ 30717926a79SDavid Howells u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 30817926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 30917926a79SDavid Howells }; 31017926a79SDavid Howells 31117926a79SDavid Howells /* 3125b8848d1SDavid Howells * Flags in call->flags. 3135b8848d1SDavid Howells */ 3145b8848d1SDavid Howells enum rxrpc_call_flag { 3155b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 3165b8848d1SDavid Howells RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ 3175b8848d1SDavid Howells RXRPC_CALL_RCVD_LAST, /* all packets received */ 3185b8848d1SDavid Howells RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ 3195b8848d1SDavid Howells RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ 3205b8848d1SDavid Howells RXRPC_CALL_PROC_BUSY, /* the processor is busy */ 3215b8848d1SDavid Howells RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 3225b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 3235b8848d1SDavid Howells RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ 3245b8848d1SDavid Howells }; 3255b8848d1SDavid Howells 3265b8848d1SDavid Howells /* 3275b8848d1SDavid Howells * Events that can be raised on a call. 3285b8848d1SDavid Howells */ 3295b8848d1SDavid Howells enum rxrpc_call_event { 3304c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ 3314c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ 3324c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ 3334c198ad1SDavid Howells RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ 3344c198ad1SDavid Howells RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ 3354c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 3364c198ad1SDavid Howells RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ 3374c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 3384c198ad1SDavid Howells RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ 3394c198ad1SDavid Howells RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ 3404c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 3414c198ad1SDavid Howells RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ 3424c198ad1SDavid Howells RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ 3434c198ad1SDavid Howells RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ 3444c198ad1SDavid Howells RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ 3454c198ad1SDavid Howells RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ 3464c198ad1SDavid Howells RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ 3475b8848d1SDavid Howells }; 3485b8848d1SDavid Howells 3495b8848d1SDavid Howells /* 3505b8848d1SDavid Howells * The states that a call can be in. 3515b8848d1SDavid Howells */ 3525b8848d1SDavid Howells enum rxrpc_call_state { 3535b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 3545b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 3555b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 3565b8848d1SDavid Howells RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ 3575b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 3585b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 3595b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 3605b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 3615b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 3625b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 3635b8848d1SDavid Howells RXRPC_CALL_COMPLETE, /* - call completed */ 3645b8848d1SDavid Howells RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ 3655b8848d1SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 3665b8848d1SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 3675b8848d1SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 3685b8848d1SDavid Howells RXRPC_CALL_DEAD, /* - call is dead */ 3695b8848d1SDavid Howells NR__RXRPC_CALL_STATES 3705b8848d1SDavid Howells }; 3715b8848d1SDavid Howells 3725b8848d1SDavid Howells /* 37317926a79SDavid Howells * RxRPC call definition 37417926a79SDavid Howells * - matched by { connection, call_id } 37517926a79SDavid Howells */ 37617926a79SDavid Howells struct rxrpc_call { 37717926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 37817926a79SDavid Howells struct rxrpc_sock *socket; /* socket responsible */ 37917926a79SDavid Howells struct timer_list lifetimer; /* lifetime remaining on call */ 38017926a79SDavid Howells struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ 38117926a79SDavid Howells struct timer_list ack_timer; /* ACK generation timer */ 38217926a79SDavid Howells struct timer_list resend_timer; /* Tx resend timer */ 38317926a79SDavid Howells struct work_struct destroyer; /* call destroyer */ 38417926a79SDavid Howells struct work_struct processor; /* packet processor and ACK generator */ 38517926a79SDavid Howells struct list_head link; /* link in master call list */ 38617926a79SDavid Howells struct list_head error_link; /* link in error distribution list */ 38717926a79SDavid Howells struct list_head accept_link; /* calls awaiting acceptance */ 38817926a79SDavid Howells struct rb_node sock_node; /* node in socket call tree */ 38917926a79SDavid Howells struct rb_node conn_node; /* node in connection call tree */ 39017926a79SDavid Howells struct sk_buff_head rx_queue; /* received packets */ 39117926a79SDavid Howells struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ 39217926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 39317926a79SDavid Howells wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ 39417926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 39517926a79SDavid Howells unsigned long creation_jif; /* time of call creation */ 39617926a79SDavid Howells unsigned long flags; 39717926a79SDavid Howells unsigned long events; 39817926a79SDavid Howells spinlock_t lock; 39917926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 40017926a79SDavid Howells atomic_t usage; 40117926a79SDavid Howells atomic_t sequence; /* Tx data packet sequence counter */ 40217926a79SDavid Howells u32 abort_code; /* local/remote abort code */ 4035b8848d1SDavid Howells enum rxrpc_call_state state : 8; /* current state of call */ 40417926a79SDavid Howells int debug_id; /* debug ID for printks */ 40517926a79SDavid Howells u8 channel; /* connection channel occupied by this call */ 40617926a79SDavid Howells 40717926a79SDavid Howells /* transmission-phase ACK management */ 4084e36a95eSDavid Howells u8 acks_head; /* offset into window of first entry */ 4094e36a95eSDavid Howells u8 acks_tail; /* offset into window of last entry */ 4104e36a95eSDavid Howells u8 acks_winsz; /* size of un-ACK'd window */ 4114e36a95eSDavid Howells u8 acks_unacked; /* lowest unacked packet in last ACK received */ 41217926a79SDavid Howells int acks_latest; /* serial number of latest ACK received */ 41317926a79SDavid Howells rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ 41417926a79SDavid Howells unsigned long *acks_window; /* sent packet window 41517926a79SDavid Howells * - elements are pointers with LSB set if ACK'd 41617926a79SDavid Howells */ 41717926a79SDavid Howells 41817926a79SDavid Howells /* receive-phase ACK management */ 41917926a79SDavid Howells rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ 42017926a79SDavid Howells rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ 42117926a79SDavid Howells rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ 42217926a79SDavid Howells rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ 42317926a79SDavid Howells rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ 42417926a79SDavid Howells rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ 4250d12f8a4SDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 4264e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 4270d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 42817926a79SDavid Howells atomic_t ackr_not_idle; /* number of packets in Rx queue */ 42917926a79SDavid Howells 43017926a79SDavid Howells /* received packet records, 1 bit per record */ 43117926a79SDavid Howells #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) 43217926a79SDavid Howells unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; 43317926a79SDavid Howells 4347727640cSTim Smith struct hlist_node hash_node; 4357727640cSTim Smith unsigned long hash_key; /* Full hash key */ 4367727640cSTim Smith u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ 4377727640cSTim Smith struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ 4387727640cSTim Smith sa_family_t proto; /* Frame protocol */ 4390d12f8a4SDavid Howells u32 call_id; /* call ID on connection */ 4400d12f8a4SDavid Howells u32 cid; /* connection ID plus channel index */ 4410d12f8a4SDavid Howells u32 epoch; /* epoch of this connection */ 4420d12f8a4SDavid Howells u16 service_id; /* service ID */ 4437727640cSTim Smith union { /* Peer IP address for hashing */ 4447727640cSTim Smith __be32 ipv4_addr; 4457727640cSTim Smith __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ 4467727640cSTim Smith } peer_ip; 44717926a79SDavid Howells }; 44817926a79SDavid Howells 44917926a79SDavid Howells /* 45017926a79SDavid Howells * locally abort an RxRPC call 45117926a79SDavid Howells */ 45217926a79SDavid Howells static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) 45317926a79SDavid Howells { 45417926a79SDavid Howells write_lock_bh(&call->state_lock); 45517926a79SDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 45617926a79SDavid Howells call->abort_code = abort_code; 45717926a79SDavid Howells call->state = RXRPC_CALL_LOCALLY_ABORTED; 4584c198ad1SDavid Howells set_bit(RXRPC_CALL_EV_ABORT, &call->events); 45917926a79SDavid Howells } 46017926a79SDavid Howells write_unlock_bh(&call->state_lock); 46117926a79SDavid Howells } 46217926a79SDavid Howells 46317926a79SDavid Howells /* 464651350d1SDavid Howells * af_rxrpc.c 46517926a79SDavid Howells */ 466651350d1SDavid Howells extern atomic_t rxrpc_n_skbs; 4670d12f8a4SDavid Howells extern u32 rxrpc_epoch; 468651350d1SDavid Howells extern atomic_t rxrpc_debug_id; 469651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 47017926a79SDavid Howells 47117926a79SDavid Howells /* 47217926a79SDavid Howells * ar-accept.c 47317926a79SDavid Howells */ 474c1b1203dSJoe Perches void rxrpc_accept_incoming_calls(struct work_struct *); 475c1b1203dSJoe Perches struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); 476c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 47717926a79SDavid Howells 47817926a79SDavid Howells /* 47917926a79SDavid Howells * ar-ack.c 48017926a79SDavid Howells */ 481dad8aff7SDavid Howells extern unsigned int rxrpc_requested_ack_delay; 482dad8aff7SDavid Howells extern unsigned int rxrpc_soft_ack_delay; 483dad8aff7SDavid Howells extern unsigned int rxrpc_idle_ack_delay; 484dad8aff7SDavid Howells extern unsigned int rxrpc_rx_window_size; 485dad8aff7SDavid Howells extern unsigned int rxrpc_rx_mtu; 486dad8aff7SDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 4875873c083SDavid Howells 4880d12f8a4SDavid Howells void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 4890d12f8a4SDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); 490c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 49117926a79SDavid Howells 49217926a79SDavid Howells /* 49317926a79SDavid Howells * ar-call.c 49417926a79SDavid Howells */ 495dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 496dad8aff7SDavid Howells extern unsigned int rxrpc_dead_call_expiry; 49717926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 49817926a79SDavid Howells extern struct list_head rxrpc_calls; 49917926a79SDavid Howells extern rwlock_t rxrpc_call_lock; 50017926a79SDavid Howells 5010d12f8a4SDavid Howells struct rxrpc_call *rxrpc_find_call_hash(struct rxrpc_host_header *, 5020d12f8a4SDavid Howells void *, sa_family_t, const void *); 503c1b1203dSJoe Perches struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, 50417926a79SDavid Howells struct rxrpc_transport *, 50517926a79SDavid Howells struct rxrpc_conn_bundle *, 50617926a79SDavid Howells unsigned long, int, gfp_t); 507c1b1203dSJoe Perches struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, 50817926a79SDavid Howells struct rxrpc_connection *, 5090d12f8a4SDavid Howells struct rxrpc_host_header *, gfp_t); 510c1b1203dSJoe Perches struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long); 511c1b1203dSJoe Perches void rxrpc_release_call(struct rxrpc_call *); 512c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 513c1b1203dSJoe Perches void __rxrpc_put_call(struct rxrpc_call *); 514c1b1203dSJoe Perches void __exit rxrpc_destroy_all_calls(void); 51517926a79SDavid Howells 51617926a79SDavid Howells /* 51717926a79SDavid Howells * ar-connection.c 51817926a79SDavid Howells */ 519dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 52017926a79SDavid Howells extern struct list_head rxrpc_connections; 52117926a79SDavid Howells extern rwlock_t rxrpc_connection_lock; 52217926a79SDavid Howells 523c1b1203dSJoe Perches struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, 52417926a79SDavid Howells struct rxrpc_transport *, 5250d12f8a4SDavid Howells struct key *, u16, gfp_t); 526c1b1203dSJoe Perches void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); 527c1b1203dSJoe Perches int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, 528c1b1203dSJoe Perches struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t); 529c1b1203dSJoe Perches void rxrpc_put_connection(struct rxrpc_connection *); 530c1b1203dSJoe Perches void __exit rxrpc_destroy_all_connections(void); 531c1b1203dSJoe Perches struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, 5320d12f8a4SDavid Howells struct rxrpc_host_header *); 53317926a79SDavid Howells extern struct rxrpc_connection * 5340d12f8a4SDavid Howells rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_host_header *, 53517926a79SDavid Howells gfp_t); 53617926a79SDavid Howells 53717926a79SDavid Howells /* 53817926a79SDavid Howells * ar-connevent.c 53917926a79SDavid Howells */ 540c1b1203dSJoe Perches void rxrpc_process_connection(struct work_struct *); 541c1b1203dSJoe Perches void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); 542c1b1203dSJoe Perches void rxrpc_reject_packets(struct work_struct *); 54317926a79SDavid Howells 54417926a79SDavid Howells /* 54517926a79SDavid Howells * ar-error.c 54617926a79SDavid Howells */ 547c1b1203dSJoe Perches void rxrpc_UDP_error_report(struct sock *); 548c1b1203dSJoe Perches void rxrpc_UDP_error_handler(struct work_struct *); 54917926a79SDavid Howells 55017926a79SDavid Howells /* 55117926a79SDavid Howells * ar-input.c 55217926a79SDavid Howells */ 55317926a79SDavid Howells extern const char *rxrpc_pkts[]; 55417926a79SDavid Howells 555676d2369SDavid S. Miller void rxrpc_data_ready(struct sock *); 556c1b1203dSJoe Perches int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); 557c1b1203dSJoe Perches void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); 55817926a79SDavid Howells 55917926a79SDavid Howells /* 56017926a79SDavid Howells * ar-local.c 56117926a79SDavid Howells */ 56217926a79SDavid Howells extern rwlock_t rxrpc_local_lock; 5635873c083SDavid Howells 564c1b1203dSJoe Perches struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); 565c1b1203dSJoe Perches void rxrpc_put_local(struct rxrpc_local *); 566c1b1203dSJoe Perches void __exit rxrpc_destroy_all_locals(void); 56717926a79SDavid Howells 56817926a79SDavid Howells /* 56917926a79SDavid Howells * ar-key.c 57017926a79SDavid Howells */ 57117926a79SDavid Howells extern struct key_type key_type_rxrpc; 57217926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 57317926a79SDavid Howells 574c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 575c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 576c1b1203dSJoe Perches int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, 577c1b1203dSJoe Perches u32); 57817926a79SDavid Howells 57917926a79SDavid Howells /* 58017926a79SDavid Howells * ar-output.c 58117926a79SDavid Howells */ 582dad8aff7SDavid Howells extern unsigned int rxrpc_resend_timeout; 58317926a79SDavid Howells 584c1b1203dSJoe Perches int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); 5851b784140SYing Xue int rxrpc_client_sendmsg(struct rxrpc_sock *, struct rxrpc_transport *, 5861b784140SYing Xue struct msghdr *, size_t); 5871b784140SYing Xue int rxrpc_server_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 58817926a79SDavid Howells 58917926a79SDavid Howells /* 59017926a79SDavid Howells * ar-peer.c 59117926a79SDavid Howells */ 592c1b1203dSJoe Perches struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); 593c1b1203dSJoe Perches void rxrpc_put_peer(struct rxrpc_peer *); 594c1b1203dSJoe Perches struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16); 595c1b1203dSJoe Perches void __exit rxrpc_destroy_all_peers(void); 59617926a79SDavid Howells 59717926a79SDavid Howells /* 59817926a79SDavid Howells * ar-proc.c 59917926a79SDavid Howells */ 600036c2e27SJan Engelhardt extern const char *const rxrpc_call_states[]; 601036c2e27SJan Engelhardt extern const struct file_operations rxrpc_call_seq_fops; 602036c2e27SJan Engelhardt extern const struct file_operations rxrpc_connection_seq_fops; 60317926a79SDavid Howells 60417926a79SDavid Howells /* 60517926a79SDavid Howells * ar-recvmsg.c 60617926a79SDavid Howells */ 607c1b1203dSJoe Perches void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); 6081b784140SYing Xue int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 60917926a79SDavid Howells 61017926a79SDavid Howells /* 61117926a79SDavid Howells * ar-security.c 61217926a79SDavid Howells */ 613c1b1203dSJoe Perches int rxrpc_register_security(struct rxrpc_security *); 614c1b1203dSJoe Perches void rxrpc_unregister_security(struct rxrpc_security *); 615c1b1203dSJoe Perches int rxrpc_init_client_conn_security(struct rxrpc_connection *); 616c1b1203dSJoe Perches int rxrpc_init_server_conn_security(struct rxrpc_connection *); 617c1b1203dSJoe Perches int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t, 618c1b1203dSJoe Perches void *); 619c1b1203dSJoe Perches int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *); 620c1b1203dSJoe Perches void rxrpc_clear_conn_security(struct rxrpc_connection *); 62117926a79SDavid Howells 62217926a79SDavid Howells /* 62317926a79SDavid Howells * ar-skbuff.c 62417926a79SDavid Howells */ 625c1b1203dSJoe Perches void rxrpc_packet_destructor(struct sk_buff *); 62617926a79SDavid Howells 62717926a79SDavid Howells /* 62817926a79SDavid Howells * ar-transport.c 62917926a79SDavid Howells */ 630dad8aff7SDavid Howells extern unsigned int rxrpc_transport_expiry; 6315873c083SDavid Howells 632c1b1203dSJoe Perches struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, 633c1b1203dSJoe Perches struct rxrpc_peer *, gfp_t); 634c1b1203dSJoe Perches void rxrpc_put_transport(struct rxrpc_transport *); 635c1b1203dSJoe Perches void __exit rxrpc_destroy_all_transports(void); 636c1b1203dSJoe Perches struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, 63717926a79SDavid Howells struct rxrpc_peer *); 63817926a79SDavid Howells 63917926a79SDavid Howells /* 6405873c083SDavid Howells * sysctl.c 6415873c083SDavid Howells */ 6425873c083SDavid Howells #ifdef CONFIG_SYSCTL 6435873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 6445873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 6455873c083SDavid Howells #else 6465873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 6475873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 6485873c083SDavid Howells #endif 6495873c083SDavid Howells 6505873c083SDavid Howells /* 65117926a79SDavid Howells * debug tracing 65217926a79SDavid Howells */ 65395c96174SEric Dumazet extern unsigned int rxrpc_debug; 65417926a79SDavid Howells 65517926a79SDavid Howells #define dbgprintk(FMT,...) \ 6569f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 65717926a79SDavid Howells 6580dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 6590dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 66017926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 66117926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 66217926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 66317926a79SDavid Howells 66417926a79SDavid Howells 66517926a79SDavid Howells #if defined(__KDEBUG) 66617926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 66717926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 66817926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 66917926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 67017926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 67117926a79SDavid Howells 67217926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 67317926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 67417926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 67517926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 67617926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 67717926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 67817926a79SDavid Howells 67917926a79SDavid Howells #define _enter(FMT,...) \ 68017926a79SDavid Howells do { \ 68117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 68217926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 68317926a79SDavid Howells } while (0) 68417926a79SDavid Howells 68517926a79SDavid Howells #define _leave(FMT,...) \ 68617926a79SDavid Howells do { \ 68717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 68817926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 68917926a79SDavid Howells } while (0) 69017926a79SDavid Howells 69117926a79SDavid Howells #define _debug(FMT,...) \ 69217926a79SDavid Howells do { \ 69317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 69417926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 69517926a79SDavid Howells } while (0) 69617926a79SDavid Howells 69717926a79SDavid Howells #define _proto(FMT,...) \ 69817926a79SDavid Howells do { \ 69917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 70017926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 70117926a79SDavid Howells } while (0) 70217926a79SDavid Howells 70317926a79SDavid Howells #define _net(FMT,...) \ 70417926a79SDavid Howells do { \ 70517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 70617926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 70717926a79SDavid Howells } while (0) 70817926a79SDavid Howells 70917926a79SDavid Howells #else 71012fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 71112fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 71212fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 71312fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 71412fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 71517926a79SDavid Howells #endif 71617926a79SDavid Howells 71717926a79SDavid Howells /* 71817926a79SDavid Howells * debug assertion checking 71917926a79SDavid Howells */ 72017926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 72117926a79SDavid Howells 72217926a79SDavid Howells #define ASSERT(X) \ 72317926a79SDavid Howells do { \ 72417926a79SDavid Howells if (unlikely(!(X))) { \ 72517926a79SDavid Howells printk(KERN_ERR "\n"); \ 72617926a79SDavid Howells printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 72717926a79SDavid Howells BUG(); \ 72817926a79SDavid Howells } \ 72917926a79SDavid Howells } while (0) 73017926a79SDavid Howells 73117926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 73217926a79SDavid Howells do { \ 73317926a79SDavid Howells if (unlikely(!((X) OP (Y)))) { \ 73417926a79SDavid Howells printk(KERN_ERR "\n"); \ 73517926a79SDavid Howells printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 73617926a79SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 73717926a79SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 73817926a79SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 73917926a79SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 74017926a79SDavid Howells BUG(); \ 74117926a79SDavid Howells } \ 74217926a79SDavid Howells } while (0) 74317926a79SDavid Howells 74417926a79SDavid Howells #define ASSERTIF(C, X) \ 74517926a79SDavid Howells do { \ 74617926a79SDavid Howells if (unlikely((C) && !(X))) { \ 74717926a79SDavid Howells printk(KERN_ERR "\n"); \ 74817926a79SDavid Howells printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 74917926a79SDavid Howells BUG(); \ 75017926a79SDavid Howells } \ 75117926a79SDavid Howells } while (0) 75217926a79SDavid Howells 75317926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 75417926a79SDavid Howells do { \ 75517926a79SDavid Howells if (unlikely((C) && !((X) OP (Y)))) { \ 75617926a79SDavid Howells printk(KERN_ERR "\n"); \ 75717926a79SDavid Howells printk(KERN_ERR "RxRPC: Assertion failed\n"); \ 75817926a79SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 75917926a79SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 76017926a79SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 76117926a79SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 76217926a79SDavid Howells BUG(); \ 76317926a79SDavid Howells } \ 76417926a79SDavid Howells } while (0) 76517926a79SDavid Howells 76617926a79SDavid Howells #else 76717926a79SDavid Howells 76817926a79SDavid Howells #define ASSERT(X) \ 76917926a79SDavid Howells do { \ 77017926a79SDavid Howells } while (0) 77117926a79SDavid Howells 77217926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 77317926a79SDavid Howells do { \ 77417926a79SDavid Howells } while (0) 77517926a79SDavid Howells 77617926a79SDavid Howells #define ASSERTIF(C, X) \ 77717926a79SDavid Howells do { \ 77817926a79SDavid Howells } while (0) 77917926a79SDavid Howells 78017926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 78117926a79SDavid Howells do { \ 78217926a79SDavid Howells } while (0) 78317926a79SDavid Howells 78417926a79SDavid Howells #endif /* __KDEBUGALL */ 78517926a79SDavid Howells 78617926a79SDavid Howells /* 78717926a79SDavid Howells * socket buffer accounting / leak finding 78817926a79SDavid Howells */ 78917926a79SDavid Howells static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) 79017926a79SDavid Howells { 79117926a79SDavid Howells //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 79217926a79SDavid Howells //atomic_inc(&rxrpc_n_skbs); 79317926a79SDavid Howells } 79417926a79SDavid Howells 79517926a79SDavid Howells #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) 79617926a79SDavid Howells 79717926a79SDavid Howells static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) 79817926a79SDavid Howells { 79917926a79SDavid Howells //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); 80017926a79SDavid Howells //atomic_dec(&rxrpc_n_skbs); 80117926a79SDavid Howells } 80217926a79SDavid Howells 80317926a79SDavid Howells #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) 80417926a79SDavid Howells 80517926a79SDavid Howells static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) 80617926a79SDavid Howells { 80717926a79SDavid Howells if (skb) { 80817926a79SDavid Howells CHECK_SLAB_OKAY(&skb->users); 80917926a79SDavid Howells //_net("free skb %p %s [%d]", 81017926a79SDavid Howells // skb, fn, atomic_read(&rxrpc_n_skbs)); 81117926a79SDavid Howells //atomic_dec(&rxrpc_n_skbs); 81217926a79SDavid Howells kfree_skb(skb); 81317926a79SDavid Howells } 81417926a79SDavid Howells } 81517926a79SDavid Howells 81617926a79SDavid Howells #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) 81717926a79SDavid Howells 81817926a79SDavid Howells static inline void rxrpc_purge_queue(struct sk_buff_head *list) 81917926a79SDavid Howells { 82017926a79SDavid Howells struct sk_buff *skb; 82117926a79SDavid Howells while ((skb = skb_dequeue((list))) != NULL) 82217926a79SDavid Howells rxrpc_free_skb(skb); 82317926a79SDavid Howells } 82417926a79SDavid Howells 82517926a79SDavid Howells static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) 82617926a79SDavid Howells { 82717926a79SDavid Howells CHECK_SLAB_OKAY(&local->usage); 82817926a79SDavid Howells if (atomic_inc_return(&local->usage) == 1) 82917926a79SDavid Howells printk("resurrected (%s)\n", f); 83017926a79SDavid Howells } 83117926a79SDavid Howells 83217926a79SDavid Howells #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) 83317926a79SDavid Howells 83417926a79SDavid Howells #define rxrpc_get_call(CALL) \ 83517926a79SDavid Howells do { \ 83617926a79SDavid Howells CHECK_SLAB_OKAY(&(CALL)->usage); \ 83717926a79SDavid Howells if (atomic_inc_return(&(CALL)->usage) == 1) \ 83817926a79SDavid Howells BUG(); \ 83917926a79SDavid Howells } while (0) 84017926a79SDavid Howells 84117926a79SDavid Howells #define rxrpc_put_call(CALL) \ 84217926a79SDavid Howells do { \ 84317926a79SDavid Howells __rxrpc_put_call(CALL); \ 84417926a79SDavid Howells } while (0) 845