117926a79SDavid Howells /* AF_RXRPC internal definitions 217926a79SDavid Howells * 317926a79SDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 417926a79SDavid Howells * Written by David Howells (dhowells@redhat.com) 517926a79SDavid Howells * 617926a79SDavid Howells * This program is free software; you can redistribute it and/or 717926a79SDavid Howells * modify it under the terms of the GNU General Public License 817926a79SDavid Howells * as published by the Free Software Foundation; either version 917926a79SDavid Howells * 2 of the License, or (at your option) any later version. 1017926a79SDavid Howells */ 1117926a79SDavid Howells 12be6e6707SDavid Howells #include <linux/atomic.h> 138496af50SDavid Howells #include <linux/seqlock.h> 142baec2c3SDavid Howells #include <net/net_namespace.h> 152baec2c3SDavid Howells #include <net/netns/generic.h> 16e0e4d82fSDavid Howells #include <net/sock.h> 17be6e6707SDavid Howells #include <net/af_rxrpc.h> 18ddc6c70fSDavid Howells #include "protocol.h" 1917926a79SDavid Howells 2017926a79SDavid Howells #if 0 2117926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 2217926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 2317926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 2417926a79SDavid Howells #else 2517926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2617926a79SDavid Howells #endif 2717926a79SDavid Howells 2817926a79SDavid Howells #define FCRYPT_BSIZE 8 2917926a79SDavid Howells struct rxrpc_crypt { 3017926a79SDavid Howells union { 3117926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 3291e916cfSAl Viro __be32 n[2]; 3317926a79SDavid Howells }; 3417926a79SDavid Howells } __attribute__((aligned(8))); 3517926a79SDavid Howells 36651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 37651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 38651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 39651350d1SDavid Howells 40cc8feb8eSDavid Howells struct rxrpc_connection; 41cc8feb8eSDavid Howells 4217926a79SDavid Howells /* 43d001648eSDavid Howells * Mark applied to socket buffers. 44d001648eSDavid Howells */ 45d001648eSDavid Howells enum rxrpc_skb_mark { 46d001648eSDavid Howells RXRPC_SKB_MARK_DATA, /* data message */ 47d001648eSDavid Howells RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ 48d001648eSDavid Howells RXRPC_SKB_MARK_BUSY, /* server busy message */ 49d001648eSDavid Howells RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ 50d001648eSDavid Howells RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ 51d001648eSDavid Howells RXRPC_SKB_MARK_NET_ERROR, /* network error message */ 52d001648eSDavid Howells RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ 53d001648eSDavid Howells RXRPC_SKB_MARK_NEW_CALL, /* local error message */ 54d001648eSDavid Howells }; 55d001648eSDavid Howells 56d001648eSDavid Howells /* 5717926a79SDavid Howells * sk_state for RxRPC sockets 5817926a79SDavid Howells */ 5917926a79SDavid Howells enum { 602341e077SDavid Howells RXRPC_UNBOUND = 0, 612341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 6217926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 6317926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 6428036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 6517926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 66210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 6717926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 6817926a79SDavid Howells }; 6917926a79SDavid Howells 7017926a79SDavid Howells /* 712baec2c3SDavid Howells * Per-network namespace data. 722baec2c3SDavid Howells */ 732baec2c3SDavid Howells struct rxrpc_net { 742baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 752baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 762baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 772baec2c3SDavid Howells rwlock_t call_lock; /* Lock for ->calls */ 78d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 792baec2c3SDavid Howells 802baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 812baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 822baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 833d18cbb7SDavid Howells struct work_struct service_conn_reaper; 843d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 852baec2c3SDavid Howells 862baec2c3SDavid Howells unsigned int nr_client_conns; 872baec2c3SDavid Howells unsigned int nr_active_client_conns; 882baec2c3SDavid Howells bool kill_all_client_conns; 89f859ab61SDavid Howells bool live; 902baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 912baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 922baec2c3SDavid Howells struct list_head waiting_client_conns; 932baec2c3SDavid Howells struct list_head active_client_conns; 942baec2c3SDavid Howells struct list_head idle_client_conns; 953d18cbb7SDavid Howells struct work_struct client_conn_reaper; 963d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 972baec2c3SDavid Howells 982baec2c3SDavid Howells struct list_head local_endpoints; 992baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 1002baec2c3SDavid Howells 1012baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 102ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 103ace45becSDavid Howells 104ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 105ace45becSDavid Howells u8 peer_keepalive_cursor; 106ace45becSDavid Howells ktime_t peer_keepalive_base; 107ace45becSDavid Howells struct hlist_head peer_keepalive[RXRPC_KEEPALIVE_TIME + 1]; 108ace45becSDavid Howells struct hlist_head peer_keepalive_new; 109ace45becSDavid Howells struct timer_list peer_keepalive_timer; 110ace45becSDavid Howells struct work_struct peer_keepalive_work; 1112baec2c3SDavid Howells }; 1122baec2c3SDavid Howells 1132baec2c3SDavid Howells /* 11400e90712SDavid Howells * Service backlog preallocation. 11500e90712SDavid Howells * 11600e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 11700e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 11800e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 11900e90712SDavid Howells * shuffle packets around so much. 12000e90712SDavid Howells */ 12100e90712SDavid Howells struct rxrpc_backlog { 12200e90712SDavid Howells unsigned short peer_backlog_head; 12300e90712SDavid Howells unsigned short peer_backlog_tail; 12400e90712SDavid Howells unsigned short conn_backlog_head; 12500e90712SDavid Howells unsigned short conn_backlog_tail; 12600e90712SDavid Howells unsigned short call_backlog_head; 12700e90712SDavid Howells unsigned short call_backlog_tail; 12800e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 12900e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 13000e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 13100e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 13200e90712SDavid Howells }; 13300e90712SDavid Howells 13400e90712SDavid Howells /* 13517926a79SDavid Howells * RxRPC socket definition 13617926a79SDavid Howells */ 13717926a79SDavid Howells struct rxrpc_sock { 13817926a79SDavid Howells /* WARNING: sk has to be the first member */ 13917926a79SDavid Howells struct sock sk; 140d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 14100e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 14217926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 14300e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 144248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 145248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 146248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 147248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 148248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 14917926a79SDavid Howells struct key *key; /* security for this socket */ 15017926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 15100e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 15217926a79SDavid Howells unsigned long flags; 1532341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 15417926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 15517926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 15617926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 157cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 15828036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1594722974dSDavid Howells struct { 1604722974dSDavid Howells /* Service upgrade information */ 1614722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1624722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1634722974dSDavid Howells } service_upgrade; 164cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1654722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1662341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 16717926a79SDavid Howells }; 16817926a79SDavid Howells 16917926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 17017926a79SDavid Howells 17117926a79SDavid Howells /* 1720d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1730d12f8a4SDavid Howells */ 1740d12f8a4SDavid Howells struct rxrpc_host_header { 1750d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1760d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1770d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1780d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1790d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1800d12f8a4SDavid Howells u8 type; /* packet type */ 1810d12f8a4SDavid Howells u8 flags; /* packet flags */ 1820d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1830d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1840d12f8a4SDavid Howells union { 1850d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1860d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1870d12f8a4SDavid Howells }; 1880d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1890d12f8a4SDavid Howells } __packed; 1900d12f8a4SDavid Howells 1910d12f8a4SDavid Howells /* 19217926a79SDavid Howells * RxRPC socket buffer private variables 19317926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 19417926a79SDavid Howells */ 19517926a79SDavid Howells struct rxrpc_skb_priv { 196248f219cSDavid Howells union { 197248f219cSDavid Howells u8 nr_jumbo; /* Number of jumbo subpackets */ 198248f219cSDavid Howells }; 19917926a79SDavid Howells union { 20017926a79SDavid Howells int remain; /* amount of space remaining for next write */ 20117926a79SDavid Howells }; 20217926a79SDavid Howells 2030d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 20417926a79SDavid Howells }; 20517926a79SDavid Howells 20617926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 20717926a79SDavid Howells 20817926a79SDavid Howells /* 20917926a79SDavid Howells * RxRPC security module interface 21017926a79SDavid Howells */ 21117926a79SDavid Howells struct rxrpc_security { 21217926a79SDavid Howells const char *name; /* name of this service */ 21317926a79SDavid Howells u8 security_index; /* security type provided */ 21417926a79SDavid Howells 215648af7fcSDavid Howells /* Initialise a security service */ 216648af7fcSDavid Howells int (*init)(void); 217648af7fcSDavid Howells 218648af7fcSDavid Howells /* Clean up a security service */ 219648af7fcSDavid Howells void (*exit)(void); 220648af7fcSDavid Howells 22117926a79SDavid Howells /* initialise a connection's security */ 22217926a79SDavid Howells int (*init_connection_security)(struct rxrpc_connection *); 22317926a79SDavid Howells 22417926a79SDavid Howells /* prime a connection's packet security */ 225a263629dSHerbert Xu int (*prime_packet_security)(struct rxrpc_connection *); 22617926a79SDavid Howells 22717926a79SDavid Howells /* impose security on a packet */ 228a263629dSHerbert Xu int (*secure_packet)(struct rxrpc_call *, 22917926a79SDavid Howells struct sk_buff *, 23017926a79SDavid Howells size_t, 23117926a79SDavid Howells void *); 23217926a79SDavid Howells 23317926a79SDavid Howells /* verify the security on a received packet */ 2345a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 235248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 236248f219cSDavid Howells 237248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 238248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 239248f219cSDavid Howells unsigned int *, unsigned int *); 24017926a79SDavid Howells 24117926a79SDavid Howells /* issue a challenge */ 24217926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 24317926a79SDavid Howells 24417926a79SDavid Howells /* respond to a challenge */ 24517926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 24617926a79SDavid Howells struct sk_buff *, 24717926a79SDavid Howells u32 *); 24817926a79SDavid Howells 24917926a79SDavid Howells /* verify a response */ 25017926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 25117926a79SDavid Howells struct sk_buff *, 25217926a79SDavid Howells u32 *); 25317926a79SDavid Howells 25417926a79SDavid Howells /* clear connection security */ 25517926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 25617926a79SDavid Howells }; 25717926a79SDavid Howells 25817926a79SDavid Howells /* 2594f95dd78SDavid Howells * RxRPC local transport endpoint description 2604f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2614f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 26217926a79SDavid Howells */ 26317926a79SDavid Howells struct rxrpc_local { 2644f95dd78SDavid Howells struct rcu_head rcu; 2654f95dd78SDavid Howells atomic_t usage; 2662baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 2674f95dd78SDavid Howells struct list_head link; 26817926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2694f95dd78SDavid Howells struct work_struct processor; 2701e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 27117926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 27217926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 27344ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 274999b69f8SDavid Howells struct rb_root client_conns; /* Client connections by socket params */ 275999b69f8SDavid Howells spinlock_t client_conns_lock; /* Lock for client_conns */ 27617926a79SDavid Howells spinlock_t lock; /* access lock */ 27717926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 27817926a79SDavid Howells int debug_id; /* debug ID for printks */ 2794f95dd78SDavid Howells bool dead; 280f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 28117926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 28217926a79SDavid Howells }; 28317926a79SDavid Howells 28417926a79SDavid Howells /* 28517926a79SDavid Howells * RxRPC remote transport endpoint definition 286be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 28717926a79SDavid Howells */ 28817926a79SDavid Howells struct rxrpc_peer { 289be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 290be6e6707SDavid Howells atomic_t usage; 291be6e6707SDavid Howells unsigned long hash_key; 292be6e6707SDavid Howells struct hlist_node hash_link; 293be6e6707SDavid Howells struct rxrpc_local *local; 294f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 295f66d7490SDavid Howells struct work_struct error_distributor; 296aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 297ace45becSDavid Howells struct hlist_node keepalive_link; /* Link in net->peer_keepalive[] */ 298ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 2998496af50SDavid Howells seqlock_t service_conn_lock; 30017926a79SDavid Howells spinlock_t lock; /* access lock */ 30195c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 30295c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 30395c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 30417926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 30517926a79SDavid Howells int debug_id; /* debug ID for printks */ 306f66d7490SDavid Howells int error_report; /* Net (+0) or local (+1000000) to distribute */ 307f66d7490SDavid Howells #define RXRPC_LOCAL_ERROR_OFFSET 1000000 30817926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 30917926a79SDavid Howells 31017926a79SDavid Howells /* calculated RTT cache */ 31117926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 3120d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 313cf1a6474SDavid Howells u64 rtt; /* Current RTT estimate (in nS) */ 314cf1a6474SDavid Howells u64 rtt_sum; /* Sum of cache contents */ 315cf1a6474SDavid Howells u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 316cf1a6474SDavid Howells u8 rtt_cursor; /* next entry at which to insert */ 317cf1a6474SDavid Howells u8 rtt_usage; /* amount of cache actually used */ 318f7aec129SDavid Howells 319f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 32017926a79SDavid Howells }; 32117926a79SDavid Howells 32217926a79SDavid Howells /* 32319ffa01cSDavid Howells * Keys for matching a connection. 32419ffa01cSDavid Howells */ 32519ffa01cSDavid Howells struct rxrpc_conn_proto { 326e8d70ce1SDavid Howells union { 327e8d70ce1SDavid Howells struct { 32819ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 32919ffa01cSDavid Howells u32 cid; /* connection ID */ 330e8d70ce1SDavid Howells }; 331e8d70ce1SDavid Howells u64 index_key; 33219ffa01cSDavid Howells }; 33319ffa01cSDavid Howells }; 33419ffa01cSDavid Howells 33519ffa01cSDavid Howells struct rxrpc_conn_parameters { 33619ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 33719ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 33819ffa01cSDavid Howells struct key *key; /* Security details */ 33919ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3404e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 34119ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 34219ffa01cSDavid Howells u32 security_level; /* Security level selected */ 34319ffa01cSDavid Howells }; 34419ffa01cSDavid Howells 34519ffa01cSDavid Howells /* 346bba304dbSDavid Howells * Bits in the connection flags. 347bba304dbSDavid Howells */ 348bba304dbSDavid Howells enum rxrpc_conn_flag { 349bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 350001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 351001c1122SDavid Howells RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 35245025bceSDavid Howells RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 35345025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 35445025bceSDavid Howells RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 3554e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3563136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3573136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3583136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3593136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 360bba304dbSDavid Howells }; 361bba304dbSDavid Howells 3623136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3633136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3643136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3653136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3663136ef49SDavid Howells 367bba304dbSDavid Howells /* 368bba304dbSDavid Howells * Events that can be raised upon a connection. 369bba304dbSDavid Howells */ 370bba304dbSDavid Howells enum rxrpc_conn_event { 371bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 372bba304dbSDavid Howells }; 373bba304dbSDavid Howells 374bba304dbSDavid Howells /* 37545025bceSDavid Howells * The connection cache state. 37645025bceSDavid Howells */ 37745025bceSDavid Howells enum rxrpc_conn_cache_state { 37845025bceSDavid Howells RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 37945025bceSDavid Howells RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 38045025bceSDavid Howells RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 3814e255721SDavid Howells RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 38245025bceSDavid Howells RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 38345025bceSDavid Howells RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 384363deeabSDavid Howells RXRPC_CONN__NR_CACHE_STATES 38545025bceSDavid Howells }; 38645025bceSDavid Howells 38745025bceSDavid Howells /* 388bba304dbSDavid Howells * The connection protocol state. 389bba304dbSDavid Howells */ 390bba304dbSDavid Howells enum rxrpc_conn_proto_state { 391bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 392bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 39300e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 394bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 395bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 396bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 397bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 398bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 399bba304dbSDavid Howells RXRPC_CONN__NR_STATES 400bba304dbSDavid Howells }; 401bba304dbSDavid Howells 402bba304dbSDavid Howells /* 40317926a79SDavid Howells * RxRPC connection definition 404aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 40517926a79SDavid Howells * - each connection can only handle four simultaneous calls 40617926a79SDavid Howells */ 40717926a79SDavid Howells struct rxrpc_connection { 40819ffa01cSDavid Howells struct rxrpc_conn_proto proto; 40919ffa01cSDavid Howells struct rxrpc_conn_parameters params; 41019ffa01cSDavid Howells 41145025bceSDavid Howells atomic_t usage; 41245025bceSDavid Howells struct rcu_head rcu; 41345025bceSDavid Howells struct list_head cache_link; 414a1399f8bSDavid Howells 41545025bceSDavid Howells spinlock_t channel_lock; 41645025bceSDavid Howells unsigned char active_chans; /* Mask of active channels */ 41745025bceSDavid Howells #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 41845025bceSDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 419a1399f8bSDavid Howells struct rxrpc_channel { 4203136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 421a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 422a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 423a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 424a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 42518bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 42618bfeba5SDavid Howells union { 42718bfeba5SDavid Howells u32 last_seq; 42818bfeba5SDavid Howells u32 last_abort; 42918bfeba5SDavid Howells }; 430a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 431999b69f8SDavid Howells 4323136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 43317926a79SDavid Howells struct work_struct processor; /* connection event processor */ 434999b69f8SDavid Howells union { 435999b69f8SDavid Howells struct rb_node client_node; /* Node in local->client_conns */ 436aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 437999b69f8SDavid Howells }; 4384d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 43917926a79SDavid Howells struct list_head link; /* link in master connection list */ 44017926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 441648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 44217926a79SDavid Howells struct key *server_key; /* security for this service */ 4431afe593bSHerbert Xu struct crypto_skcipher *cipher; /* encryption handle */ 44417926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 4454a3388c8SDavid Howells unsigned long flags; 44617926a79SDavid Howells unsigned long events; 447f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 44817926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 449cf13258fSDavid Howells enum rxrpc_conn_cache_state cache_state; 450cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 451dc44b3a0SDavid Howells u32 local_abort; /* local abort code */ 452dc44b3a0SDavid Howells u32 remote_abort; /* remote abort code */ 45317926a79SDavid Howells int debug_id; /* debug ID for printks */ 45417926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 455563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 45617926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 45768d6d1aeSDavid Howells u16 service_id; /* Service ID, possibly upgraded */ 4585a924b89SDavid Howells u8 size_align; /* data size alignment (for security) */ 4595a924b89SDavid Howells u8 security_size; /* security header size */ 46017926a79SDavid Howells u8 security_ix; /* security type */ 46117926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 46217926a79SDavid Howells }; 46317926a79SDavid Howells 46417926a79SDavid Howells /* 4655b8848d1SDavid Howells * Flags in call->flags. 4665b8848d1SDavid Howells */ 4675b8848d1SDavid Howells enum rxrpc_call_flag { 4685b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4695b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 470dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 47145025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 472248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 473248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 474c038a58cSDavid Howells RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 475a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 4768e83134dSDavid Howells RXRPC_CALL_PINGING, /* Ping in process */ 47757494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 4785b8848d1SDavid Howells }; 4795b8848d1SDavid Howells 4805b8848d1SDavid Howells /* 4815b8848d1SDavid Howells * Events that can be raised on a call. 4825b8848d1SDavid Howells */ 4835b8848d1SDavid Howells enum rxrpc_call_event { 4844c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 4854c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 4864c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 487a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 488a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 489bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 4905b8848d1SDavid Howells }; 4915b8848d1SDavid Howells 4925b8848d1SDavid Howells /* 4935b8848d1SDavid Howells * The states that a call can be in. 4945b8848d1SDavid Howells */ 4955b8848d1SDavid Howells enum rxrpc_call_state { 496999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 497999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 4985b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 4995b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5005b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 50100e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5025b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5035b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 5045b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5055b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5065b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5075b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 508f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 509f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 510f5c17aaeSDavid Howells }; 511f5c17aaeSDavid Howells 512f5c17aaeSDavid Howells /* 51357494343SDavid Howells * Call Tx congestion management modes. 51457494343SDavid Howells */ 51557494343SDavid Howells enum rxrpc_congest_mode { 51657494343SDavid Howells RXRPC_CALL_SLOW_START, 51757494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 51857494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 51957494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 52057494343SDavid Howells NR__RXRPC_CONGEST_MODES 52157494343SDavid Howells }; 52257494343SDavid Howells 52357494343SDavid Howells /* 52417926a79SDavid Howells * RxRPC call definition 52517926a79SDavid Howells * - matched by { connection, call_id } 52617926a79SDavid Howells */ 52717926a79SDavid Howells struct rxrpc_call { 528dee46364SDavid Howells struct rcu_head rcu; 52917926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 530df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5318d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 532d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 533540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 534a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 535bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 536a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 537a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 538415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 539a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 540a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 541a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 542a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 543a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 544248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 545248f219cSDavid Howells struct work_struct processor; /* Event processor */ 546d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 54717926a79SDavid Howells struct list_head link; /* link in master call list */ 54845025bceSDavid Howells struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 549f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 550248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 551248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 552248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 553248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 55417926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 55545025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 556e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 557a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 55817926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 55917926a79SDavid Howells unsigned long flags; 56017926a79SDavid Howells unsigned long events; 56117926a79SDavid Howells spinlock_t lock; 56220acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 56317926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 564f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 565f5c17aaeSDavid Howells int error; /* Local error incurred */ 566cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 567cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 56817926a79SDavid Howells atomic_t usage; 569dabe5a79SDavid Howells u16 service_id; /* service ID */ 570278ac0cdSDavid Howells u8 security_ix; /* Security type */ 571dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 572dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 573dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 5748e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 5758e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 57617926a79SDavid Howells 577248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 578248f219cSDavid Howells * 579248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 580248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 581248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 582248f219cSDavid Howells * 583248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 584248f219cSDavid Howells * acked. 58517926a79SDavid Howells */ 586248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 587248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 58875e42126SDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 32 589248f219cSDavid Howells struct sk_buff **rxtx_buffer; 590248f219cSDavid Howells u8 *rxtx_annotations; 591248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 592248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 593248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 594248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 595f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 59670790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 59770790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 59870790dbeSDavid Howells 599248f219cSDavid Howells #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 600248f219cSDavid Howells #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 601248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 602248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 603248f219cSDavid Howells * not hard-ACK'd packet follows this. 604248f219cSDavid Howells */ 605248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 60657494343SDavid Howells 60757494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 60857494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 60957494343SDavid Howells * packets) rather than bytes. 61057494343SDavid Howells */ 61157494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 61257494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 61357494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 61457494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 61557494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 61657494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 61757494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 61857494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 61957494343SDavid Howells 620248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 621248f219cSDavid Howells * consumed packet follows this. 622248f219cSDavid Howells */ 623248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 624248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 625248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 626248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 62771f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 62875e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 62917926a79SDavid Howells 63017926a79SDavid Howells /* receive-phase ACK management */ 6314e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 632563ea7d5SDavid Howells u16 ackr_skew; /* skew on packet being ACK'd */ 6330d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 634248f219cSDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 635805b21b9SDavid Howells rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 636805b21b9SDavid Howells rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 637a5af7e1fSDavid Howells 638a5af7e1fSDavid Howells /* ping management */ 639a5af7e1fSDavid Howells rxrpc_serial_t ping_serial; /* Last ping sent */ 640a5af7e1fSDavid Howells ktime_t ping_time; /* Time last ping sent */ 64117926a79SDavid Howells 642248f219cSDavid Howells /* transmission-phase ACK management */ 64357494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 644248f219cSDavid Howells rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 64531a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 646bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 647bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 64831a1b989SDavid Howells }; 64931a1b989SDavid Howells 65031a1b989SDavid Howells /* 65157494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 65231a1b989SDavid Howells */ 65331a1b989SDavid Howells struct rxrpc_ack_summary { 65431a1b989SDavid Howells u8 ack_reason; 65531a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 65631a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 65731a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 65831a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 65931a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 66031a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 66157494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 66257494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 66357494343SDavid Howells /* Place to stash values for tracing */ 66457494343SDavid Howells enum rxrpc_congest_mode mode:8; 66557494343SDavid Howells u8 cwnd; 66657494343SDavid Howells u8 ssthresh; 66757494343SDavid Howells u8 dup_acks; 66857494343SDavid Howells u8 cumulative_acks; 66917926a79SDavid Howells }; 67017926a79SDavid Howells 67148124178SDavid Howells /* 67248124178SDavid Howells * sendmsg() cmsg-specified parameters. 67348124178SDavid Howells */ 67448124178SDavid Howells enum rxrpc_command { 67548124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 67648124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 67748124178SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 67848124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 67948124178SDavid Howells }; 68048124178SDavid Howells 68148124178SDavid Howells struct rxrpc_call_params { 68248124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 68348124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 68448124178SDavid Howells struct { 68548124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 68648124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 68748124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 68848124178SDavid Howells } timeouts; 68948124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 69048124178SDavid Howells }; 69148124178SDavid Howells 69248124178SDavid Howells struct rxrpc_send_params { 69348124178SDavid Howells struct rxrpc_call_params call; 69448124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 69548124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 69648124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 69748124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 69848124178SDavid Howells }; 69948124178SDavid Howells 700df844fd4SDavid Howells #include <trace/events/rxrpc.h> 701df844fd4SDavid Howells 70217926a79SDavid Howells /* 703651350d1SDavid Howells * af_rxrpc.c 70417926a79SDavid Howells */ 70571f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 706651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 70717926a79SDavid Howells 70817926a79SDavid Howells /* 7090d81a51aSDavid Howells * call_accept.c 71017926a79SDavid Howells */ 71100e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 71200e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 713248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 714248f219cSDavid Howells struct rxrpc_connection *, 715248f219cSDavid Howells struct sk_buff *); 7164f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 717d001648eSDavid Howells struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 718d001648eSDavid Howells rxrpc_notify_rx_t); 719c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 72017926a79SDavid Howells 72117926a79SDavid Howells /* 7220d81a51aSDavid Howells * call_event.c 72317926a79SDavid Howells */ 7249c7ad434SDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 7259c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 726c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 72717926a79SDavid Howells 728a158bdd3SDavid Howells static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 729a158bdd3SDavid Howells unsigned long expire_at, 730a158bdd3SDavid Howells unsigned long now, 731a158bdd3SDavid Howells enum rxrpc_timer_trace why) 732a158bdd3SDavid Howells { 733a158bdd3SDavid Howells trace_rxrpc_timer(call, why, now); 734a158bdd3SDavid Howells timer_reduce(&call->timer, expire_at); 735a158bdd3SDavid Howells } 736a158bdd3SDavid Howells 73717926a79SDavid Howells /* 7380d81a51aSDavid Howells * call_object.c 73917926a79SDavid Howells */ 740f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 741f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 742dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 74317926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 74417926a79SDavid Howells 7452341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 746a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7472341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 74819ffa01cSDavid Howells struct rxrpc_conn_parameters *, 749999b69f8SDavid Howells struct sockaddr_rxrpc *, 750a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 751a25e21f0SDavid Howells unsigned int); 752c038a58cSDavid Howells int rxrpc_retry_client_call(struct rxrpc_sock *, 753c038a58cSDavid Howells struct rxrpc_call *, 754c038a58cSDavid Howells struct rxrpc_conn_parameters *, 755c038a58cSDavid Howells struct sockaddr_rxrpc *, 756c038a58cSDavid Howells gfp_t); 757248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 75842886ffeSDavid Howells struct sk_buff *); 7598d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 760c038a58cSDavid Howells int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 761c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 7628d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 7638d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 764e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 765fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 766fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 76700e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 7682baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 76917926a79SDavid Howells 770dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 771dabe5a79SDavid Howells { 772dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 773dabe5a79SDavid Howells } 774dabe5a79SDavid Howells 775dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 776dabe5a79SDavid Howells { 777dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 778dabe5a79SDavid Howells } 779dabe5a79SDavid Howells 78017926a79SDavid Howells /* 781f5c17aaeSDavid Howells * Transition a call to the complete state. 782f5c17aaeSDavid Howells */ 783f5c17aaeSDavid Howells static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 784f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 785f5c17aaeSDavid Howells u32 abort_code, 786f5c17aaeSDavid Howells int error) 787f5c17aaeSDavid Howells { 788f5c17aaeSDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 789f5c17aaeSDavid Howells call->abort_code = abort_code; 790f5c17aaeSDavid Howells call->error = error; 791f5c17aaeSDavid Howells call->completion = compl, 792f5c17aaeSDavid Howells call->state = RXRPC_CALL_COMPLETE; 7931bae5d22SDavid Howells trace_rxrpc_call_complete(call); 794c0d058c2SDavid Howells wake_up(&call->waitq); 795f5c17aaeSDavid Howells return true; 796f5c17aaeSDavid Howells } 797f5c17aaeSDavid Howells return false; 798f5c17aaeSDavid Howells } 799f5c17aaeSDavid Howells 800f5c17aaeSDavid Howells static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 801f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 802f5c17aaeSDavid Howells u32 abort_code, 803f5c17aaeSDavid Howells int error) 804f5c17aaeSDavid Howells { 805e8d6bbb0SDavid Howells bool ret; 806f5c17aaeSDavid Howells 807f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 808f5c17aaeSDavid Howells ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 809f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 810f5c17aaeSDavid Howells return ret; 811f5c17aaeSDavid Howells } 812f5c17aaeSDavid Howells 813f5c17aaeSDavid Howells /* 814f5c17aaeSDavid Howells * Record that a call successfully completed. 815f5c17aaeSDavid Howells */ 816e8d6bbb0SDavid Howells static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 817f5c17aaeSDavid Howells { 818e8d6bbb0SDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 819f5c17aaeSDavid Howells } 820f5c17aaeSDavid Howells 821e8d6bbb0SDavid Howells static inline bool rxrpc_call_completed(struct rxrpc_call *call) 822f5c17aaeSDavid Howells { 823e8d6bbb0SDavid Howells bool ret; 824e8d6bbb0SDavid Howells 825f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 826e8d6bbb0SDavid Howells ret = __rxrpc_call_completed(call); 827f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 828e8d6bbb0SDavid Howells return ret; 829f5c17aaeSDavid Howells } 830f5c17aaeSDavid Howells 831f5c17aaeSDavid Howells /* 832f5c17aaeSDavid Howells * Record that a call is locally aborted. 833f5c17aaeSDavid Howells */ 8345a42976dSDavid Howells static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8355a42976dSDavid Howells rxrpc_seq_t seq, 836f5c17aaeSDavid Howells u32 abort_code, int error) 837f5c17aaeSDavid Howells { 838a25e21f0SDavid Howells trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 8395a42976dSDavid Howells abort_code, error); 840248f219cSDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 841248f219cSDavid Howells abort_code, error); 842f5c17aaeSDavid Howells } 843f5c17aaeSDavid Howells 8445a42976dSDavid Howells static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8455a42976dSDavid Howells rxrpc_seq_t seq, u32 abort_code, int error) 846f5c17aaeSDavid Howells { 847f5c17aaeSDavid Howells bool ret; 848f5c17aaeSDavid Howells 849f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 8505a42976dSDavid Howells ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 851f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 852f5c17aaeSDavid Howells return ret; 853f5c17aaeSDavid Howells } 854f5c17aaeSDavid Howells 855f5c17aaeSDavid Howells /* 856fb46f6eeSDavid Howells * Abort a call due to a protocol error. 857fb46f6eeSDavid Howells */ 858fb46f6eeSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 859fb46f6eeSDavid Howells struct sk_buff *skb, 860fb46f6eeSDavid Howells const char *eproto_why, 861fb46f6eeSDavid Howells const char *why, 862fb46f6eeSDavid Howells u32 abort_code) 863fb46f6eeSDavid Howells { 864fb46f6eeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 865fb46f6eeSDavid Howells 866fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 867fb46f6eeSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 868fb46f6eeSDavid Howells } 869fb46f6eeSDavid Howells 870fb46f6eeSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 871fb46f6eeSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 872fb46f6eeSDavid Howells (abort_why), (abort_code)) 873fb46f6eeSDavid Howells 874fb46f6eeSDavid Howells /* 8754a3388c8SDavid Howells * conn_client.c 8764a3388c8SDavid Howells */ 87745025bceSDavid Howells extern unsigned int rxrpc_max_client_connections; 87845025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 879a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 880a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8814a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8824a3388c8SDavid Howells 883eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 884c6d2b8d7SDavid Howells int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 885c6d2b8d7SDavid Howells struct sockaddr_rxrpc *, gfp_t); 88645025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 88745025bceSDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_call *); 88845025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 8892baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 8902baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 8914a3388c8SDavid Howells 8924a3388c8SDavid Howells /* 8930d81a51aSDavid Howells * conn_event.c 8940d81a51aSDavid Howells */ 8950d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 8960d81a51aSDavid Howells 8970d81a51aSDavid Howells /* 8980d81a51aSDavid Howells * conn_object.c 89917926a79SDavid Howells */ 900dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 901f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 90217926a79SDavid Howells 903c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 9048496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 905aa390bbeSDavid Howells struct sk_buff *); 90645025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 907999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 90845025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 909363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 910363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 911363deeabSDavid Howells void rxrpc_get_connection(struct rxrpc_connection *); 912363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 913363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 9142baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 9152baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 91617926a79SDavid Howells 91719ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 91819ffa01cSDavid Howells { 91919ffa01cSDavid Howells return conn->out_clientflag; 92019ffa01cSDavid Howells } 92119ffa01cSDavid Howells 92219ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 92319ffa01cSDavid Howells { 924e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 92519ffa01cSDavid Howells } 92619ffa01cSDavid Howells 927f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 928f51b4480SDavid Howells { 92945025bceSDavid Howells if (!conn) 93045025bceSDavid Howells return; 93145025bceSDavid Howells 932363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 93345025bceSDavid Howells rxrpc_put_client_conn(conn); 934363deeabSDavid Howells else 935363deeabSDavid Howells rxrpc_put_service_conn(conn); 9365acbee46SDavid Howells } 9375acbee46SDavid Howells 9383136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9393136ef49SDavid Howells unsigned long expire_at) 9403136ef49SDavid Howells { 9413136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9423136ef49SDavid Howells } 9433136ef49SDavid Howells 94417926a79SDavid Howells /* 9457877a4a4SDavid Howells * conn_service.c 9467877a4a4SDavid Howells */ 9478496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9488496af50SDavid Howells struct sk_buff *); 9492baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 9504722974dSDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, 9514722974dSDavid Howells struct rxrpc_connection *, struct sk_buff *); 952001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9537877a4a4SDavid Howells 9547877a4a4SDavid Howells /* 9550d81a51aSDavid Howells * input.c 95617926a79SDavid Howells */ 957676d2369SDavid S. Miller void rxrpc_data_ready(struct sock *); 95817926a79SDavid Howells 95917926a79SDavid Howells /* 9600d81a51aSDavid Howells * insecure.c 96117926a79SDavid Howells */ 9620d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 96317926a79SDavid Howells 96417926a79SDavid Howells /* 9650d81a51aSDavid Howells * key.c 96617926a79SDavid Howells */ 96717926a79SDavid Howells extern struct key_type key_type_rxrpc; 96817926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 96917926a79SDavid Howells 970c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 971c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 97210674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 973c1b1203dSJoe Perches u32); 97417926a79SDavid Howells 97517926a79SDavid Howells /* 97687563616SDavid Howells * local_event.c 97787563616SDavid Howells */ 9784f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 97987563616SDavid Howells 98087563616SDavid Howells /* 9810d81a51aSDavid Howells * local_object.c 98217926a79SDavid Howells */ 9832baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 9844f95dd78SDavid Howells void __rxrpc_put_local(struct rxrpc_local *); 9852baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 986e0e4d82fSDavid Howells 9874f95dd78SDavid Howells static inline void rxrpc_get_local(struct rxrpc_local *local) 9884f95dd78SDavid Howells { 9894f95dd78SDavid Howells atomic_inc(&local->usage); 9904f95dd78SDavid Howells } 9914f95dd78SDavid Howells 9924f95dd78SDavid Howells static inline 9934f95dd78SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) 9944f95dd78SDavid Howells { 9954f95dd78SDavid Howells return atomic_inc_not_zero(&local->usage) ? local : NULL; 9964f95dd78SDavid Howells } 9974f95dd78SDavid Howells 9984f95dd78SDavid Howells static inline void rxrpc_put_local(struct rxrpc_local *local) 9994f95dd78SDavid Howells { 10005627cc8bSDavid Howells if (local && atomic_dec_and_test(&local->usage)) 10014f95dd78SDavid Howells __rxrpc_put_local(local); 10024f95dd78SDavid Howells } 10034f95dd78SDavid Howells 10045acbee46SDavid Howells static inline void rxrpc_queue_local(struct rxrpc_local *local) 10055acbee46SDavid Howells { 10065acbee46SDavid Howells rxrpc_queue_work(&local->processor); 10075acbee46SDavid Howells } 10085acbee46SDavid Howells 1009e0e4d82fSDavid Howells /* 10108e688d9cSDavid Howells * misc.c 10118e688d9cSDavid Howells */ 10120e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 1013a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 1014a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 1015a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 10168e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 10178e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 10188e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 1019a158bdd3SDavid Howells extern unsigned long rxrpc_resend_timeout; 10208e688d9cSDavid Howells 10218e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 10228e688d9cSDavid Howells 10238e688d9cSDavid Howells /* 10242baec2c3SDavid Howells * net_ns.c 10252baec2c3SDavid Howells */ 10262baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 10272baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 10282baec2c3SDavid Howells 10292baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 10302baec2c3SDavid Howells { 10312baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 10322baec2c3SDavid Howells } 10332baec2c3SDavid Howells 10342baec2c3SDavid Howells /* 10350d81a51aSDavid Howells * output.c 10360d81a51aSDavid Howells */ 1037bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 103826cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 1039a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1040248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 1041ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 10420d81a51aSDavid Howells 10430d81a51aSDavid Howells /* 1044abe89ef0SDavid Howells * peer_event.c 10450d81a51aSDavid Howells */ 1046abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1047f66d7490SDavid Howells void rxrpc_peer_error_distributor(struct work_struct *); 1048cf1a6474SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1049cf1a6474SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1050ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10510d81a51aSDavid Howells 10520d81a51aSDavid Howells /* 10530d81a51aSDavid Howells * peer_object.c 10540d81a51aSDavid Howells */ 1055be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1056be6e6707SDavid Howells const struct sockaddr_rxrpc *); 1057be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1058be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1059be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 1060248f219cSDavid Howells struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, 1061248f219cSDavid Howells struct rxrpc_peer *); 1062be6e6707SDavid Howells 1063df5d8bf7SDavid Howells static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) 1064be6e6707SDavid Howells { 1065be6e6707SDavid Howells atomic_inc(&peer->usage); 1066df5d8bf7SDavid Howells return peer; 1067be6e6707SDavid Howells } 1068be6e6707SDavid Howells 1069be6e6707SDavid Howells static inline 1070be6e6707SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) 1071be6e6707SDavid Howells { 1072be6e6707SDavid Howells return atomic_inc_not_zero(&peer->usage) ? peer : NULL; 1073be6e6707SDavid Howells } 1074be6e6707SDavid Howells 1075be6e6707SDavid Howells extern void __rxrpc_put_peer(struct rxrpc_peer *peer); 1076be6e6707SDavid Howells static inline void rxrpc_put_peer(struct rxrpc_peer *peer) 1077be6e6707SDavid Howells { 10785627cc8bSDavid Howells if (peer && atomic_dec_and_test(&peer->usage)) 1079be6e6707SDavid Howells __rxrpc_put_peer(peer); 1080be6e6707SDavid Howells } 10810d81a51aSDavid Howells 10820d81a51aSDavid Howells /* 10830d81a51aSDavid Howells * proc.c 10840d81a51aSDavid Howells */ 10850d81a51aSDavid Howells extern const struct file_operations rxrpc_call_seq_fops; 10860d81a51aSDavid Howells extern const struct file_operations rxrpc_connection_seq_fops; 10870d81a51aSDavid Howells 10880d81a51aSDavid Howells /* 10890d81a51aSDavid Howells * recvmsg.c 10900d81a51aSDavid Howells */ 1091248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10920d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10930d81a51aSDavid Howells 10940d81a51aSDavid Howells /* 1095648af7fcSDavid Howells * rxkad.c 1096648af7fcSDavid Howells */ 1097648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1098648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1099648af7fcSDavid Howells #endif 1100648af7fcSDavid Howells 1101648af7fcSDavid Howells /* 11020d81a51aSDavid Howells * security.c 11030d81a51aSDavid Howells */ 11040d81a51aSDavid Howells int __init rxrpc_init_security(void); 11050d81a51aSDavid Howells void rxrpc_exit_security(void); 11060d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 11070d81a51aSDavid Howells int rxrpc_init_server_conn_security(struct rxrpc_connection *); 11080d81a51aSDavid Howells 11090d81a51aSDavid Howells /* 11100b58b8a1SDavid Howells * sendmsg.c 11110b58b8a1SDavid Howells */ 11120b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 11130b58b8a1SDavid Howells 11140b58b8a1SDavid Howells /* 11150d81a51aSDavid Howells * skbuff.c 11160d81a51aSDavid Howells */ 1117d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 11180d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 111971f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 112071f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 112171f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 112271f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 112371f3ca40SDavid Howells void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1124df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 11250d81a51aSDavid Howells 11260d81a51aSDavid Howells /* 11275873c083SDavid Howells * sysctl.c 11285873c083SDavid Howells */ 11295873c083SDavid Howells #ifdef CONFIG_SYSCTL 11305873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11315873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11325873c083SDavid Howells #else 11335873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11345873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11355873c083SDavid Howells #endif 11365873c083SDavid Howells 11375873c083SDavid Howells /* 1138be6e6707SDavid Howells * utils.c 1139be6e6707SDavid Howells */ 11407b674e39SDavid Howells int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 11417b674e39SDavid Howells struct sk_buff *); 1142be6e6707SDavid Howells 1143248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1144248f219cSDavid Howells { 1145248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1146248f219cSDavid Howells } 1147248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1148248f219cSDavid Howells { 1149248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1150248f219cSDavid Howells } 1151248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1152248f219cSDavid Howells { 1153248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1154248f219cSDavid Howells } 1155248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1156248f219cSDavid Howells { 1157248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1158248f219cSDavid Howells } 1159248f219cSDavid Howells 1160be6e6707SDavid Howells /* 116117926a79SDavid Howells * debug tracing 116217926a79SDavid Howells */ 116395c96174SEric Dumazet extern unsigned int rxrpc_debug; 116417926a79SDavid Howells 116517926a79SDavid Howells #define dbgprintk(FMT,...) \ 11669f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 116717926a79SDavid Howells 11680dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11690dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 117017926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 117117926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 117217926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 117317926a79SDavid Howells 117417926a79SDavid Howells 117517926a79SDavid Howells #if defined(__KDEBUG) 117617926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 117717926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 117817926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 117917926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 118017926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 118117926a79SDavid Howells 118217926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 118317926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 118417926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 118517926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 118617926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 118717926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 118817926a79SDavid Howells 118917926a79SDavid Howells #define _enter(FMT,...) \ 119017926a79SDavid Howells do { \ 119117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 119217926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 119317926a79SDavid Howells } while (0) 119417926a79SDavid Howells 119517926a79SDavid Howells #define _leave(FMT,...) \ 119617926a79SDavid Howells do { \ 119717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 119817926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 119917926a79SDavid Howells } while (0) 120017926a79SDavid Howells 120117926a79SDavid Howells #define _debug(FMT,...) \ 120217926a79SDavid Howells do { \ 120317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 120417926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 120517926a79SDavid Howells } while (0) 120617926a79SDavid Howells 120717926a79SDavid Howells #define _proto(FMT,...) \ 120817926a79SDavid Howells do { \ 120917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 121017926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 121117926a79SDavid Howells } while (0) 121217926a79SDavid Howells 121317926a79SDavid Howells #define _net(FMT,...) \ 121417926a79SDavid Howells do { \ 121517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 121617926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 121717926a79SDavid Howells } while (0) 121817926a79SDavid Howells 121917926a79SDavid Howells #else 122012fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 122112fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 122212fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 122312fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 122412fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 122517926a79SDavid Howells #endif 122617926a79SDavid Howells 122717926a79SDavid Howells /* 122817926a79SDavid Howells * debug assertion checking 122917926a79SDavid Howells */ 123017926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 123117926a79SDavid Howells 123217926a79SDavid Howells #define ASSERT(X) \ 123317926a79SDavid Howells do { \ 123417926a79SDavid Howells if (unlikely(!(X))) { \ 12359b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 123617926a79SDavid Howells BUG(); \ 123717926a79SDavid Howells } \ 123817926a79SDavid Howells } while (0) 123917926a79SDavid Howells 124017926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 124117926a79SDavid Howells do { \ 1242cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1243cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12449b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12459b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1246cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1247cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 124817926a79SDavid Howells BUG(); \ 124917926a79SDavid Howells } \ 125017926a79SDavid Howells } while (0) 125117926a79SDavid Howells 125217926a79SDavid Howells #define ASSERTIF(C, X) \ 125317926a79SDavid Howells do { \ 125417926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12559b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 125617926a79SDavid Howells BUG(); \ 125717926a79SDavid Howells } \ 125817926a79SDavid Howells } while (0) 125917926a79SDavid Howells 126017926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 126117926a79SDavid Howells do { \ 1262cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1263cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12649b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12659b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1266cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1267cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 126817926a79SDavid Howells BUG(); \ 126917926a79SDavid Howells } \ 127017926a79SDavid Howells } while (0) 127117926a79SDavid Howells 127217926a79SDavid Howells #else 127317926a79SDavid Howells 127417926a79SDavid Howells #define ASSERT(X) \ 127517926a79SDavid Howells do { \ 127617926a79SDavid Howells } while (0) 127717926a79SDavid Howells 127817926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 127917926a79SDavid Howells do { \ 128017926a79SDavid Howells } while (0) 128117926a79SDavid Howells 128217926a79SDavid Howells #define ASSERTIF(C, X) \ 128317926a79SDavid Howells do { \ 128417926a79SDavid Howells } while (0) 128517926a79SDavid Howells 128617926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 128717926a79SDavid Howells do { \ 128817926a79SDavid Howells } while (0) 128917926a79SDavid Howells 129017926a79SDavid Howells #endif /* __KDEBUGALL */ 1291