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 /* 43ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 44ece64fecSDavid Howells * to pass supplementary information. 45d001648eSDavid Howells */ 46d001648eSDavid Howells enum rxrpc_skb_mark { 47ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 48ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 49d001648eSDavid Howells }; 50d001648eSDavid Howells 51d001648eSDavid Howells /* 5217926a79SDavid Howells * sk_state for RxRPC sockets 5317926a79SDavid Howells */ 5417926a79SDavid Howells enum { 552341e077SDavid Howells RXRPC_UNBOUND = 0, 562341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 5717926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 5817926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5928036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 6017926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 61210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 6217926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 6317926a79SDavid Howells }; 6417926a79SDavid Howells 6517926a79SDavid Howells /* 662baec2c3SDavid Howells * Per-network namespace data. 672baec2c3SDavid Howells */ 682baec2c3SDavid Howells struct rxrpc_net { 692baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 702baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 712baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 722baec2c3SDavid Howells rwlock_t call_lock; /* Lock for ->calls */ 73d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 742baec2c3SDavid Howells 7531f5f9a1SDavid Howells atomic_t nr_conns; 762baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 772baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 782baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 793d18cbb7SDavid Howells struct work_struct service_conn_reaper; 803d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 812baec2c3SDavid Howells 822baec2c3SDavid Howells unsigned int nr_client_conns; 832baec2c3SDavid Howells unsigned int nr_active_client_conns; 842baec2c3SDavid Howells bool kill_all_client_conns; 85f859ab61SDavid Howells bool live; 862baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 872baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 882baec2c3SDavid Howells struct list_head waiting_client_conns; 892baec2c3SDavid Howells struct list_head active_client_conns; 902baec2c3SDavid Howells struct list_head idle_client_conns; 913d18cbb7SDavid Howells struct work_struct client_conn_reaper; 923d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 932baec2c3SDavid Howells 942baec2c3SDavid Howells struct list_head local_endpoints; 952baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 962baec2c3SDavid Howells 972baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 98ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 99ace45becSDavid Howells 100ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 101ace45becSDavid Howells u8 peer_keepalive_cursor; 102330bdcfaSDavid Howells time64_t peer_keepalive_base; 103330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 104330bdcfaSDavid Howells struct list_head peer_keepalive_new; 105ace45becSDavid Howells struct timer_list peer_keepalive_timer; 106ace45becSDavid Howells struct work_struct peer_keepalive_work; 1072baec2c3SDavid Howells }; 1082baec2c3SDavid Howells 1092baec2c3SDavid Howells /* 11000e90712SDavid Howells * Service backlog preallocation. 11100e90712SDavid Howells * 11200e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 11300e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 11400e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 11500e90712SDavid Howells * shuffle packets around so much. 11600e90712SDavid Howells */ 11700e90712SDavid Howells struct rxrpc_backlog { 11800e90712SDavid Howells unsigned short peer_backlog_head; 11900e90712SDavid Howells unsigned short peer_backlog_tail; 12000e90712SDavid Howells unsigned short conn_backlog_head; 12100e90712SDavid Howells unsigned short conn_backlog_tail; 12200e90712SDavid Howells unsigned short call_backlog_head; 12300e90712SDavid Howells unsigned short call_backlog_tail; 12400e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 12500e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 12600e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 12700e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 12800e90712SDavid Howells }; 12900e90712SDavid Howells 13000e90712SDavid Howells /* 13117926a79SDavid Howells * RxRPC socket definition 13217926a79SDavid Howells */ 13317926a79SDavid Howells struct rxrpc_sock { 13417926a79SDavid Howells /* WARNING: sk has to be the first member */ 13517926a79SDavid Howells struct sock sk; 136d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 13700e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 13817926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 13900e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 140248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 141248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 142248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 143248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 144248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 14517926a79SDavid Howells struct key *key; /* security for this socket */ 14617926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 14700e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 14817926a79SDavid Howells unsigned long flags; 1492341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 15017926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 15117926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 15217926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 153cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 15428036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1554722974dSDavid Howells struct { 1564722974dSDavid Howells /* Service upgrade information */ 1574722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1584722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1594722974dSDavid Howells } service_upgrade; 160cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1614722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1622341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 16317926a79SDavid Howells }; 16417926a79SDavid Howells 16517926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 16617926a79SDavid Howells 16717926a79SDavid Howells /* 1680d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1690d12f8a4SDavid Howells */ 1700d12f8a4SDavid Howells struct rxrpc_host_header { 1710d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1720d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1730d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1740d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1750d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1760d12f8a4SDavid Howells u8 type; /* packet type */ 1770d12f8a4SDavid Howells u8 flags; /* packet flags */ 1780d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1790d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1800d12f8a4SDavid Howells union { 1810d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1820d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1830d12f8a4SDavid Howells }; 1840d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1850d12f8a4SDavid Howells } __packed; 1860d12f8a4SDavid Howells 1870d12f8a4SDavid Howells /* 18817926a79SDavid Howells * RxRPC socket buffer private variables 18917926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 19017926a79SDavid Howells */ 19117926a79SDavid Howells struct rxrpc_skb_priv { 192248f219cSDavid Howells union { 193248f219cSDavid Howells u8 nr_jumbo; /* Number of jumbo subpackets */ 194248f219cSDavid Howells }; 19517926a79SDavid Howells union { 19617926a79SDavid Howells int remain; /* amount of space remaining for next write */ 19717926a79SDavid Howells }; 19817926a79SDavid Howells 1990d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 20017926a79SDavid Howells }; 20117926a79SDavid Howells 20217926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 20317926a79SDavid Howells 20417926a79SDavid Howells /* 20517926a79SDavid Howells * RxRPC security module interface 20617926a79SDavid Howells */ 20717926a79SDavid Howells struct rxrpc_security { 20817926a79SDavid Howells const char *name; /* name of this service */ 20917926a79SDavid Howells u8 security_index; /* security type provided */ 21017926a79SDavid Howells 211648af7fcSDavid Howells /* Initialise a security service */ 212648af7fcSDavid Howells int (*init)(void); 213648af7fcSDavid Howells 214648af7fcSDavid Howells /* Clean up a security service */ 215648af7fcSDavid Howells void (*exit)(void); 216648af7fcSDavid Howells 21717926a79SDavid Howells /* initialise a connection's security */ 21817926a79SDavid Howells int (*init_connection_security)(struct rxrpc_connection *); 21917926a79SDavid Howells 22017926a79SDavid Howells /* prime a connection's packet security */ 221a263629dSHerbert Xu int (*prime_packet_security)(struct rxrpc_connection *); 22217926a79SDavid Howells 22317926a79SDavid Howells /* impose security on a packet */ 224a263629dSHerbert Xu int (*secure_packet)(struct rxrpc_call *, 22517926a79SDavid Howells struct sk_buff *, 22617926a79SDavid Howells size_t, 22717926a79SDavid Howells void *); 22817926a79SDavid Howells 22917926a79SDavid Howells /* verify the security on a received packet */ 2305a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 231248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 232248f219cSDavid Howells 233248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 234248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 235248f219cSDavid Howells unsigned int *, unsigned int *); 23617926a79SDavid Howells 23717926a79SDavid Howells /* issue a challenge */ 23817926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 23917926a79SDavid Howells 24017926a79SDavid Howells /* respond to a challenge */ 24117926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 24217926a79SDavid Howells struct sk_buff *, 24317926a79SDavid Howells u32 *); 24417926a79SDavid Howells 24517926a79SDavid Howells /* verify a response */ 24617926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 24717926a79SDavid Howells struct sk_buff *, 24817926a79SDavid Howells u32 *); 24917926a79SDavid Howells 25017926a79SDavid Howells /* clear connection security */ 25117926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 25217926a79SDavid Howells }; 25317926a79SDavid Howells 25417926a79SDavid Howells /* 2554f95dd78SDavid Howells * RxRPC local transport endpoint description 2564f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2574f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 25817926a79SDavid Howells */ 25917926a79SDavid Howells struct rxrpc_local { 2604f95dd78SDavid Howells struct rcu_head rcu; 2614f95dd78SDavid Howells atomic_t usage; 2622baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 2634f95dd78SDavid Howells struct list_head link; 26417926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2654f95dd78SDavid Howells struct work_struct processor; 2661e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 26717926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 26817926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 26944ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 270999b69f8SDavid Howells struct rb_root client_conns; /* Client connections by socket params */ 271999b69f8SDavid Howells spinlock_t client_conns_lock; /* Lock for client_conns */ 27217926a79SDavid Howells spinlock_t lock; /* access lock */ 27317926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 27417926a79SDavid Howells int debug_id; /* debug ID for printks */ 2754f95dd78SDavid Howells bool dead; 276f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 27717926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 27817926a79SDavid Howells }; 27917926a79SDavid Howells 28017926a79SDavid Howells /* 28117926a79SDavid Howells * RxRPC remote transport endpoint definition 282be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 28317926a79SDavid Howells */ 28417926a79SDavid Howells struct rxrpc_peer { 285be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 286be6e6707SDavid Howells atomic_t usage; 287be6e6707SDavid Howells unsigned long hash_key; 288be6e6707SDavid Howells struct hlist_node hash_link; 289be6e6707SDavid Howells struct rxrpc_local *local; 290f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 291aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 292330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 293ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 2948496af50SDavid Howells seqlock_t service_conn_lock; 29517926a79SDavid Howells spinlock_t lock; /* access lock */ 29695c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 29795c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 29895c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 29917926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 30017926a79SDavid Howells int debug_id; /* debug ID for printks */ 30117926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 30217926a79SDavid Howells 30317926a79SDavid Howells /* calculated RTT cache */ 30417926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 305c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3060d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 307cf1a6474SDavid Howells u64 rtt; /* Current RTT estimate (in nS) */ 308cf1a6474SDavid Howells u64 rtt_sum; /* Sum of cache contents */ 309cf1a6474SDavid Howells u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 310cf1a6474SDavid Howells u8 rtt_cursor; /* next entry at which to insert */ 311cf1a6474SDavid Howells u8 rtt_usage; /* amount of cache actually used */ 312f7aec129SDavid Howells 313f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 31417926a79SDavid Howells }; 31517926a79SDavid Howells 31617926a79SDavid Howells /* 31719ffa01cSDavid Howells * Keys for matching a connection. 31819ffa01cSDavid Howells */ 31919ffa01cSDavid Howells struct rxrpc_conn_proto { 320e8d70ce1SDavid Howells union { 321e8d70ce1SDavid Howells struct { 32219ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 32319ffa01cSDavid Howells u32 cid; /* connection ID */ 324e8d70ce1SDavid Howells }; 325e8d70ce1SDavid Howells u64 index_key; 32619ffa01cSDavid Howells }; 32719ffa01cSDavid Howells }; 32819ffa01cSDavid Howells 32919ffa01cSDavid Howells struct rxrpc_conn_parameters { 33019ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 33119ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 33219ffa01cSDavid Howells struct key *key; /* Security details */ 33319ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3344e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 33519ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 33619ffa01cSDavid Howells u32 security_level; /* Security level selected */ 33719ffa01cSDavid Howells }; 33819ffa01cSDavid Howells 33919ffa01cSDavid Howells /* 340bba304dbSDavid Howells * Bits in the connection flags. 341bba304dbSDavid Howells */ 342bba304dbSDavid Howells enum rxrpc_conn_flag { 343bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 344001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 345001c1122SDavid Howells RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 34645025bceSDavid Howells RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 34745025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 34845025bceSDavid Howells RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 3494e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3503136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3513136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3523136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3533136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 354bba304dbSDavid Howells }; 355bba304dbSDavid Howells 3563136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3573136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3583136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3593136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3603136ef49SDavid Howells 361bba304dbSDavid Howells /* 362bba304dbSDavid Howells * Events that can be raised upon a connection. 363bba304dbSDavid Howells */ 364bba304dbSDavid Howells enum rxrpc_conn_event { 365bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 366bba304dbSDavid Howells }; 367bba304dbSDavid Howells 368bba304dbSDavid Howells /* 36945025bceSDavid Howells * The connection cache state. 37045025bceSDavid Howells */ 37145025bceSDavid Howells enum rxrpc_conn_cache_state { 37245025bceSDavid Howells RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 37345025bceSDavid Howells RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 37445025bceSDavid Howells RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 3754e255721SDavid Howells RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 37645025bceSDavid Howells RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 37745025bceSDavid Howells RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 378363deeabSDavid Howells RXRPC_CONN__NR_CACHE_STATES 37945025bceSDavid Howells }; 38045025bceSDavid Howells 38145025bceSDavid Howells /* 382bba304dbSDavid Howells * The connection protocol state. 383bba304dbSDavid Howells */ 384bba304dbSDavid Howells enum rxrpc_conn_proto_state { 385bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 386bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 38700e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 388bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 389bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 390bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 391bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 392bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 393bba304dbSDavid Howells RXRPC_CONN__NR_STATES 394bba304dbSDavid Howells }; 395bba304dbSDavid Howells 396bba304dbSDavid Howells /* 39717926a79SDavid Howells * RxRPC connection definition 398aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 39917926a79SDavid Howells * - each connection can only handle four simultaneous calls 40017926a79SDavid Howells */ 40117926a79SDavid Howells struct rxrpc_connection { 40219ffa01cSDavid Howells struct rxrpc_conn_proto proto; 40319ffa01cSDavid Howells struct rxrpc_conn_parameters params; 40419ffa01cSDavid Howells 40545025bceSDavid Howells atomic_t usage; 40645025bceSDavid Howells struct rcu_head rcu; 40745025bceSDavid Howells struct list_head cache_link; 408a1399f8bSDavid Howells 40945025bceSDavid Howells spinlock_t channel_lock; 41045025bceSDavid Howells unsigned char active_chans; /* Mask of active channels */ 41145025bceSDavid Howells #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 41245025bceSDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 413a1399f8bSDavid Howells struct rxrpc_channel { 4143136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 415a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4164764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 417a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 418a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 419a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 42018bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 42118bfeba5SDavid Howells union { 42218bfeba5SDavid Howells u32 last_seq; 42318bfeba5SDavid Howells u32 last_abort; 42418bfeba5SDavid Howells }; 425a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 426999b69f8SDavid Howells 4273136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 42817926a79SDavid Howells struct work_struct processor; /* connection event processor */ 429999b69f8SDavid Howells union { 430999b69f8SDavid Howells struct rb_node client_node; /* Node in local->client_conns */ 431aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 432999b69f8SDavid Howells }; 4334d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 43417926a79SDavid Howells struct list_head link; /* link in master connection list */ 43517926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 436648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 43717926a79SDavid Howells struct key *server_key; /* security for this service */ 4381afe593bSHerbert Xu struct crypto_skcipher *cipher; /* encryption handle */ 43917926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 4404a3388c8SDavid Howells unsigned long flags; 44117926a79SDavid Howells unsigned long events; 442f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 44317926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 444cf13258fSDavid Howells enum rxrpc_conn_cache_state cache_state; 445cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 44664753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 44717926a79SDavid Howells int debug_id; /* debug ID for printks */ 44817926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 449563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 45017926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 451c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 4525a924b89SDavid Howells u8 size_align; /* data size alignment (for security) */ 4535a924b89SDavid Howells u8 security_size; /* security header size */ 45417926a79SDavid Howells u8 security_ix; /* security type */ 45517926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 45664753092SDavid Howells short error; /* Local error code */ 45717926a79SDavid Howells }; 45817926a79SDavid Howells 459dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 460dc71db34SDavid Howells { 461dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 462dc71db34SDavid Howells } 463dc71db34SDavid Howells 464dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 465dc71db34SDavid Howells { 466dc71db34SDavid Howells return !rxrpc_to_server(sp); 467dc71db34SDavid Howells } 468dc71db34SDavid Howells 46917926a79SDavid Howells /* 4705b8848d1SDavid Howells * Flags in call->flags. 4715b8848d1SDavid Howells */ 4725b8848d1SDavid Howells enum rxrpc_call_flag { 4735b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4745b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 475dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 47645025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 477248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 478248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 479c038a58cSDavid Howells RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 480a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 4818e83134dSDavid Howells RXRPC_CALL_PINGING, /* Ping in process */ 48257494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 483c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 4841a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 485d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 4865b8848d1SDavid Howells }; 4875b8848d1SDavid Howells 4885b8848d1SDavid Howells /* 4895b8848d1SDavid Howells * Events that can be raised on a call. 4905b8848d1SDavid Howells */ 4915b8848d1SDavid Howells enum rxrpc_call_event { 4924c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 4934c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 4944c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 495a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 496a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 497bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 4985b8848d1SDavid Howells }; 4995b8848d1SDavid Howells 5005b8848d1SDavid Howells /* 5015b8848d1SDavid Howells * The states that a call can be in. 5025b8848d1SDavid Howells */ 5035b8848d1SDavid Howells enum rxrpc_call_state { 504999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 505999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5065b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5075b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5085b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 50900e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5105b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5115b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 5125b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5135b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5145b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5155b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 516f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 517f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 518f5c17aaeSDavid Howells }; 519f5c17aaeSDavid Howells 520f5c17aaeSDavid Howells /* 52157494343SDavid Howells * Call Tx congestion management modes. 52257494343SDavid Howells */ 52357494343SDavid Howells enum rxrpc_congest_mode { 52457494343SDavid Howells RXRPC_CALL_SLOW_START, 52557494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 52657494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 52757494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 52857494343SDavid Howells NR__RXRPC_CONGEST_MODES 52957494343SDavid Howells }; 53057494343SDavid Howells 53157494343SDavid Howells /* 53217926a79SDavid Howells * RxRPC call definition 53317926a79SDavid Howells * - matched by { connection, call_id } 53417926a79SDavid Howells */ 53517926a79SDavid Howells struct rxrpc_call { 536dee46364SDavid Howells struct rcu_head rcu; 53717926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 538df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5398d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 540d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 541540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 542a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 543bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 544a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 545a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 546415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 547a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 548a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 549a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 550a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 551a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 552248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 553248f219cSDavid Howells struct work_struct processor; /* Event processor */ 554d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 55517926a79SDavid Howells struct list_head link; /* link in master call list */ 55645025bceSDavid Howells struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 557f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 558248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 559248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 560248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 561248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 56217926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 56345025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 564e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 565a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 56617926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 56717926a79SDavid Howells unsigned long flags; 56817926a79SDavid Howells unsigned long events; 56917926a79SDavid Howells spinlock_t lock; 57020acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 57117926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 572f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 573f5c17aaeSDavid Howells int error; /* Local error incurred */ 574cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 575cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 57617926a79SDavid Howells atomic_t usage; 577dabe5a79SDavid Howells u16 service_id; /* service ID */ 578278ac0cdSDavid Howells u8 security_ix; /* Security type */ 579dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 580dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 581dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 5828e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 5838e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 58417926a79SDavid Howells 585248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 586248f219cSDavid Howells * 587248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 588248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 589248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 590248f219cSDavid Howells * 591248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 592248f219cSDavid Howells * acked. 59317926a79SDavid Howells */ 594248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 595248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 5964075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 597248f219cSDavid Howells struct sk_buff **rxtx_buffer; 598248f219cSDavid Howells u8 *rxtx_annotations; 599248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 600248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 601248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 602248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 603f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 60470790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 60570790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 60670790dbeSDavid Howells 607248f219cSDavid Howells #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 608248f219cSDavid Howells #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 609248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 610248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 611248f219cSDavid Howells * not hard-ACK'd packet follows this. 612248f219cSDavid Howells */ 613248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 61457494343SDavid Howells 61557494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 61657494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 61757494343SDavid Howells * packets) rather than bytes. 61857494343SDavid Howells */ 61957494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 62057494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 62157494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 62257494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 62357494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 62457494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 62557494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 62657494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 62757494343SDavid Howells 628248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 629248f219cSDavid Howells * consumed packet follows this. 630248f219cSDavid Howells */ 631248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 632248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6331a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 634248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 635248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 63671f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 63775e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 63817926a79SDavid Howells 639c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 640c1e15b49SDavid Howells 64117926a79SDavid Howells /* receive-phase ACK management */ 6424e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 643563ea7d5SDavid Howells u16 ackr_skew; /* skew on packet being ACK'd */ 6440d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 645248f219cSDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 646805b21b9SDavid Howells rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 647805b21b9SDavid Howells rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 648a5af7e1fSDavid Howells 649a5af7e1fSDavid Howells /* ping management */ 650a5af7e1fSDavid Howells rxrpc_serial_t ping_serial; /* Last ping sent */ 651a5af7e1fSDavid Howells ktime_t ping_time; /* Time last ping sent */ 65217926a79SDavid Howells 653248f219cSDavid Howells /* transmission-phase ACK management */ 65457494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 655248f219cSDavid Howells rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 65631a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 657bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 658bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 65931a1b989SDavid Howells }; 66031a1b989SDavid Howells 66131a1b989SDavid Howells /* 66257494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 66331a1b989SDavid Howells */ 66431a1b989SDavid Howells struct rxrpc_ack_summary { 66531a1b989SDavid Howells u8 ack_reason; 66631a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 66731a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 66831a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 66931a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 67031a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 67131a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 67257494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 67357494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 67457494343SDavid Howells /* Place to stash values for tracing */ 67557494343SDavid Howells enum rxrpc_congest_mode mode:8; 67657494343SDavid Howells u8 cwnd; 67757494343SDavid Howells u8 ssthresh; 67857494343SDavid Howells u8 dup_acks; 67957494343SDavid Howells u8 cumulative_acks; 68017926a79SDavid Howells }; 68117926a79SDavid Howells 68248124178SDavid Howells /* 68348124178SDavid Howells * sendmsg() cmsg-specified parameters. 68448124178SDavid Howells */ 68548124178SDavid Howells enum rxrpc_command { 68648124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 68748124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 68848124178SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 68948124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 69048124178SDavid Howells }; 69148124178SDavid Howells 69248124178SDavid Howells struct rxrpc_call_params { 69348124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 69448124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 69548124178SDavid Howells struct { 69648124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 69748124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 69848124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 69948124178SDavid Howells } timeouts; 70048124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 70148124178SDavid Howells }; 70248124178SDavid Howells 70348124178SDavid Howells struct rxrpc_send_params { 70448124178SDavid Howells struct rxrpc_call_params call; 70548124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 70648124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 70748124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 70848124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 70948124178SDavid Howells }; 71048124178SDavid Howells 711df844fd4SDavid Howells #include <trace/events/rxrpc.h> 712df844fd4SDavid Howells 71317926a79SDavid Howells /* 714651350d1SDavid Howells * af_rxrpc.c 71517926a79SDavid Howells */ 71671f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 717651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 71817926a79SDavid Howells 71917926a79SDavid Howells /* 7200d81a51aSDavid Howells * call_accept.c 72117926a79SDavid Howells */ 72200e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 72300e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 724248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7250099dc58SDavid Howells struct rxrpc_sock *, 726248f219cSDavid Howells struct sk_buff *); 7274f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 728d001648eSDavid Howells struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 729d001648eSDavid Howells rxrpc_notify_rx_t); 730c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 73117926a79SDavid Howells 73217926a79SDavid Howells /* 7330d81a51aSDavid Howells * call_event.c 73417926a79SDavid Howells */ 7359c7ad434SDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 7369c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 737c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 73817926a79SDavid Howells 739a158bdd3SDavid Howells static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 740a158bdd3SDavid Howells unsigned long expire_at, 741a158bdd3SDavid Howells unsigned long now, 742a158bdd3SDavid Howells enum rxrpc_timer_trace why) 743a158bdd3SDavid Howells { 744a158bdd3SDavid Howells trace_rxrpc_timer(call, why, now); 745a158bdd3SDavid Howells timer_reduce(&call->timer, expire_at); 746a158bdd3SDavid Howells } 747a158bdd3SDavid Howells 74817926a79SDavid Howells /* 7490d81a51aSDavid Howells * call_object.c 75017926a79SDavid Howells */ 751f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 752f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 753dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 75417926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 75517926a79SDavid Howells 7562341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 757a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7582341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 75919ffa01cSDavid Howells struct rxrpc_conn_parameters *, 760999b69f8SDavid Howells struct sockaddr_rxrpc *, 761a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 762a25e21f0SDavid Howells unsigned int); 763c038a58cSDavid Howells int rxrpc_retry_client_call(struct rxrpc_sock *, 764c038a58cSDavid Howells struct rxrpc_call *, 765c038a58cSDavid Howells struct rxrpc_conn_parameters *, 766c038a58cSDavid Howells struct sockaddr_rxrpc *, 767c038a58cSDavid Howells gfp_t); 768248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 76942886ffeSDavid Howells struct sk_buff *); 7708d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 771c038a58cSDavid Howells int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 772c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 7738d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 7748d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 775e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 776fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 777fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 77800e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 7792baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 78017926a79SDavid Howells 781dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 782dabe5a79SDavid Howells { 783dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 784dabe5a79SDavid Howells } 785dabe5a79SDavid Howells 786dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 787dabe5a79SDavid Howells { 788dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 789dabe5a79SDavid Howells } 790dabe5a79SDavid Howells 79117926a79SDavid Howells /* 792f5c17aaeSDavid Howells * Transition a call to the complete state. 793f5c17aaeSDavid Howells */ 794f5c17aaeSDavid Howells static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 795f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 796f5c17aaeSDavid Howells u32 abort_code, 797f5c17aaeSDavid Howells int error) 798f5c17aaeSDavid Howells { 799f5c17aaeSDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 800f5c17aaeSDavid Howells call->abort_code = abort_code; 801f5c17aaeSDavid Howells call->error = error; 802f5c17aaeSDavid Howells call->completion = compl, 803f5c17aaeSDavid Howells call->state = RXRPC_CALL_COMPLETE; 8041bae5d22SDavid Howells trace_rxrpc_call_complete(call); 805c0d058c2SDavid Howells wake_up(&call->waitq); 806f5c17aaeSDavid Howells return true; 807f5c17aaeSDavid Howells } 808f5c17aaeSDavid Howells return false; 809f5c17aaeSDavid Howells } 810f5c17aaeSDavid Howells 811f5c17aaeSDavid Howells static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 812f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 813f5c17aaeSDavid Howells u32 abort_code, 814f5c17aaeSDavid Howells int error) 815f5c17aaeSDavid Howells { 816e8d6bbb0SDavid Howells bool ret; 817f5c17aaeSDavid Howells 818f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 819f5c17aaeSDavid Howells ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 820f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 821f5c17aaeSDavid Howells return ret; 822f5c17aaeSDavid Howells } 823f5c17aaeSDavid Howells 824f5c17aaeSDavid Howells /* 825f5c17aaeSDavid Howells * Record that a call successfully completed. 826f5c17aaeSDavid Howells */ 827e8d6bbb0SDavid Howells static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 828f5c17aaeSDavid Howells { 829e8d6bbb0SDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 830f5c17aaeSDavid Howells } 831f5c17aaeSDavid Howells 832e8d6bbb0SDavid Howells static inline bool rxrpc_call_completed(struct rxrpc_call *call) 833f5c17aaeSDavid Howells { 834e8d6bbb0SDavid Howells bool ret; 835e8d6bbb0SDavid Howells 836f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 837e8d6bbb0SDavid Howells ret = __rxrpc_call_completed(call); 838f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 839e8d6bbb0SDavid Howells return ret; 840f5c17aaeSDavid Howells } 841f5c17aaeSDavid Howells 842f5c17aaeSDavid Howells /* 843f5c17aaeSDavid Howells * Record that a call is locally aborted. 844f5c17aaeSDavid Howells */ 8455a42976dSDavid Howells static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8465a42976dSDavid Howells rxrpc_seq_t seq, 847f5c17aaeSDavid Howells u32 abort_code, int error) 848f5c17aaeSDavid Howells { 849a25e21f0SDavid Howells trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 8505a42976dSDavid Howells abort_code, error); 851248f219cSDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 852248f219cSDavid Howells abort_code, error); 853f5c17aaeSDavid Howells } 854f5c17aaeSDavid Howells 8555a42976dSDavid Howells static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8565a42976dSDavid Howells rxrpc_seq_t seq, u32 abort_code, int error) 857f5c17aaeSDavid Howells { 858f5c17aaeSDavid Howells bool ret; 859f5c17aaeSDavid Howells 860f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 8615a42976dSDavid Howells ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 862f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 863f5c17aaeSDavid Howells return ret; 864f5c17aaeSDavid Howells } 865f5c17aaeSDavid Howells 866f5c17aaeSDavid Howells /* 867fb46f6eeSDavid Howells * Abort a call due to a protocol error. 868fb46f6eeSDavid Howells */ 869fb46f6eeSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 870fb46f6eeSDavid Howells struct sk_buff *skb, 871fb46f6eeSDavid Howells const char *eproto_why, 872fb46f6eeSDavid Howells const char *why, 873fb46f6eeSDavid Howells u32 abort_code) 874fb46f6eeSDavid Howells { 875fb46f6eeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 876fb46f6eeSDavid Howells 877fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 878fb46f6eeSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 879fb46f6eeSDavid Howells } 880fb46f6eeSDavid Howells 881fb46f6eeSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 882fb46f6eeSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 883fb46f6eeSDavid Howells (abort_why), (abort_code)) 884fb46f6eeSDavid Howells 885fb46f6eeSDavid Howells /* 8864a3388c8SDavid Howells * conn_client.c 8874a3388c8SDavid Howells */ 88845025bceSDavid Howells extern unsigned int rxrpc_max_client_connections; 88945025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 890a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 891a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8924a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8934a3388c8SDavid Howells 894eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 8955e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 8965e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 8975e33a23bSDavid Howells gfp_t); 89845025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 89945025bceSDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_call *); 90045025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 9012baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 9022baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 9034a3388c8SDavid Howells 9044a3388c8SDavid Howells /* 9050d81a51aSDavid Howells * conn_event.c 9060d81a51aSDavid Howells */ 9070d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 9080d81a51aSDavid Howells 9090d81a51aSDavid Howells /* 9100d81a51aSDavid Howells * conn_object.c 91117926a79SDavid Howells */ 912dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 913f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 91417926a79SDavid Howells 915c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 9168496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 9170099dc58SDavid Howells struct sk_buff *, 9180099dc58SDavid Howells struct rxrpc_peer **); 91945025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 920999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 92145025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 922363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 923363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 924363deeabSDavid Howells void rxrpc_get_connection(struct rxrpc_connection *); 925363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 926363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 9272baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 9282baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 92917926a79SDavid Howells 93019ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 93119ffa01cSDavid Howells { 93219ffa01cSDavid Howells return conn->out_clientflag; 93319ffa01cSDavid Howells } 93419ffa01cSDavid Howells 93519ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 93619ffa01cSDavid Howells { 937e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 93819ffa01cSDavid Howells } 93919ffa01cSDavid Howells 940f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 941f51b4480SDavid Howells { 94245025bceSDavid Howells if (!conn) 94345025bceSDavid Howells return; 94445025bceSDavid Howells 945363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 94645025bceSDavid Howells rxrpc_put_client_conn(conn); 947363deeabSDavid Howells else 948363deeabSDavid Howells rxrpc_put_service_conn(conn); 9495acbee46SDavid Howells } 9505acbee46SDavid Howells 9513136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9523136ef49SDavid Howells unsigned long expire_at) 9533136ef49SDavid Howells { 9543136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9553136ef49SDavid Howells } 9563136ef49SDavid Howells 95717926a79SDavid Howells /* 9587877a4a4SDavid Howells * conn_service.c 9597877a4a4SDavid Howells */ 9608496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9618496af50SDavid Howells struct sk_buff *); 9622baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 9634722974dSDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, 9644722974dSDavid Howells struct rxrpc_connection *, struct sk_buff *); 965001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9667877a4a4SDavid Howells 9677877a4a4SDavid Howells /* 9680d81a51aSDavid Howells * input.c 96917926a79SDavid Howells */ 9705271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 97117926a79SDavid Howells 97217926a79SDavid Howells /* 9730d81a51aSDavid Howells * insecure.c 97417926a79SDavid Howells */ 9750d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 97617926a79SDavid Howells 97717926a79SDavid Howells /* 9780d81a51aSDavid Howells * key.c 97917926a79SDavid Howells */ 98017926a79SDavid Howells extern struct key_type key_type_rxrpc; 98117926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 98217926a79SDavid Howells 983c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 984c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 98510674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 986c1b1203dSJoe Perches u32); 98717926a79SDavid Howells 98817926a79SDavid Howells /* 98987563616SDavid Howells * local_event.c 99087563616SDavid Howells */ 9914f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 99287563616SDavid Howells 99387563616SDavid Howells /* 9940d81a51aSDavid Howells * local_object.c 99517926a79SDavid Howells */ 9962baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 99709d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 99809d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 99909d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 100009d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 10012baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 1002e0e4d82fSDavid Howells 1003e0e4d82fSDavid Howells /* 10048e688d9cSDavid Howells * misc.c 10058e688d9cSDavid Howells */ 10060e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 1007a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 1008a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 1009a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 10108e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 10118e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 10128e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 1013a158bdd3SDavid Howells extern unsigned long rxrpc_resend_timeout; 10148e688d9cSDavid Howells 10158e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 10168e688d9cSDavid Howells 10178e688d9cSDavid Howells /* 10182baec2c3SDavid Howells * net_ns.c 10192baec2c3SDavid Howells */ 10202baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 10212baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 10222baec2c3SDavid Howells 10232baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 10242baec2c3SDavid Howells { 10252baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 10262baec2c3SDavid Howells } 10272baec2c3SDavid Howells 10282baec2c3SDavid Howells /* 10290d81a51aSDavid Howells * output.c 10300d81a51aSDavid Howells */ 1031bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 103226cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 1033a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1034248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 1035ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 10360d81a51aSDavid Howells 10370d81a51aSDavid Howells /* 1038abe89ef0SDavid Howells * peer_event.c 10390d81a51aSDavid Howells */ 1040abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1041cf1a6474SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1042cf1a6474SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1043ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10440d81a51aSDavid Howells 10450d81a51aSDavid Howells /* 10460d81a51aSDavid Howells * peer_object.c 10470d81a51aSDavid Howells */ 1048be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1049be6e6707SDavid Howells const struct sockaddr_rxrpc *); 10505e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1051be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1052be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10535e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 10545e33a23bSDavid Howells struct rxrpc_peer *); 105517226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10561159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10571159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10581159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 10590d81a51aSDavid Howells 10600d81a51aSDavid Howells /* 10610d81a51aSDavid Howells * proc.c 10620d81a51aSDavid Howells */ 1063c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1064c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 10650d81a51aSDavid Howells 10660d81a51aSDavid Howells /* 10670d81a51aSDavid Howells * recvmsg.c 10680d81a51aSDavid Howells */ 1069248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10700d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10710d81a51aSDavid Howells 10720d81a51aSDavid Howells /* 1073648af7fcSDavid Howells * rxkad.c 1074648af7fcSDavid Howells */ 1075648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1076648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1077648af7fcSDavid Howells #endif 1078648af7fcSDavid Howells 1079648af7fcSDavid Howells /* 10800d81a51aSDavid Howells * security.c 10810d81a51aSDavid Howells */ 10820d81a51aSDavid Howells int __init rxrpc_init_security(void); 10830d81a51aSDavid Howells void rxrpc_exit_security(void); 10840d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 10850d81a51aSDavid Howells int rxrpc_init_server_conn_security(struct rxrpc_connection *); 10860d81a51aSDavid Howells 10870d81a51aSDavid Howells /* 10880b58b8a1SDavid Howells * sendmsg.c 10890b58b8a1SDavid Howells */ 10900b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 10910b58b8a1SDavid Howells 10920b58b8a1SDavid Howells /* 10930d81a51aSDavid Howells * skbuff.c 10940d81a51aSDavid Howells */ 1095d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 10960d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 109771f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 109871f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 109971f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 110071f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 110171f3ca40SDavid Howells void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); 1102df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 11030d81a51aSDavid Howells 11040d81a51aSDavid Howells /* 11055873c083SDavid Howells * sysctl.c 11065873c083SDavid Howells */ 11075873c083SDavid Howells #ifdef CONFIG_SYSCTL 11085873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11095873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11105873c083SDavid Howells #else 11115873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11125873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11135873c083SDavid Howells #endif 11145873c083SDavid Howells 11155873c083SDavid Howells /* 1116be6e6707SDavid Howells * utils.c 1117be6e6707SDavid Howells */ 11187b674e39SDavid Howells int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, 11197b674e39SDavid Howells struct sk_buff *); 1120be6e6707SDavid Howells 1121248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1122248f219cSDavid Howells { 1123248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1124248f219cSDavid Howells } 1125248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1126248f219cSDavid Howells { 1127248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1128248f219cSDavid Howells } 1129248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1130248f219cSDavid Howells { 1131248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1132248f219cSDavid Howells } 1133248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1134248f219cSDavid Howells { 1135248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1136248f219cSDavid Howells } 1137248f219cSDavid Howells 1138be6e6707SDavid Howells /* 113917926a79SDavid Howells * debug tracing 114017926a79SDavid Howells */ 114195c96174SEric Dumazet extern unsigned int rxrpc_debug; 114217926a79SDavid Howells 114317926a79SDavid Howells #define dbgprintk(FMT,...) \ 11449f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 114517926a79SDavid Howells 11460dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11470dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 114817926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 114917926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 115017926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 115117926a79SDavid Howells 115217926a79SDavid Howells 115317926a79SDavid Howells #if defined(__KDEBUG) 115417926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 115517926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 115617926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 115717926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 115817926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 115917926a79SDavid Howells 116017926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 116117926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 116217926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 116317926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 116417926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 116517926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 116617926a79SDavid Howells 116717926a79SDavid Howells #define _enter(FMT,...) \ 116817926a79SDavid Howells do { \ 116917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 117017926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 117117926a79SDavid Howells } while (0) 117217926a79SDavid Howells 117317926a79SDavid Howells #define _leave(FMT,...) \ 117417926a79SDavid Howells do { \ 117517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 117617926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 117717926a79SDavid Howells } while (0) 117817926a79SDavid Howells 117917926a79SDavid Howells #define _debug(FMT,...) \ 118017926a79SDavid Howells do { \ 118117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 118217926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 118317926a79SDavid Howells } while (0) 118417926a79SDavid Howells 118517926a79SDavid Howells #define _proto(FMT,...) \ 118617926a79SDavid Howells do { \ 118717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 118817926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 118917926a79SDavid Howells } while (0) 119017926a79SDavid Howells 119117926a79SDavid Howells #define _net(FMT,...) \ 119217926a79SDavid Howells do { \ 119317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 119417926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 119517926a79SDavid Howells } while (0) 119617926a79SDavid Howells 119717926a79SDavid Howells #else 119812fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 119912fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 120012fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 120112fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 120212fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 120317926a79SDavid Howells #endif 120417926a79SDavid Howells 120517926a79SDavid Howells /* 120617926a79SDavid Howells * debug assertion checking 120717926a79SDavid Howells */ 120817926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 120917926a79SDavid Howells 121017926a79SDavid Howells #define ASSERT(X) \ 121117926a79SDavid Howells do { \ 121217926a79SDavid Howells if (unlikely(!(X))) { \ 12139b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 121417926a79SDavid Howells BUG(); \ 121517926a79SDavid Howells } \ 121617926a79SDavid Howells } while (0) 121717926a79SDavid Howells 121817926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 121917926a79SDavid Howells do { \ 1220cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1221cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12229b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12239b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1224cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1225cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 122617926a79SDavid Howells BUG(); \ 122717926a79SDavid Howells } \ 122817926a79SDavid Howells } while (0) 122917926a79SDavid Howells 123017926a79SDavid Howells #define ASSERTIF(C, X) \ 123117926a79SDavid Howells do { \ 123217926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12339b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 123417926a79SDavid Howells BUG(); \ 123517926a79SDavid Howells } \ 123617926a79SDavid Howells } while (0) 123717926a79SDavid Howells 123817926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 123917926a79SDavid Howells do { \ 1240cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1241cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12429b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12439b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1244cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1245cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 124617926a79SDavid Howells BUG(); \ 124717926a79SDavid Howells } \ 124817926a79SDavid Howells } while (0) 124917926a79SDavid Howells 125017926a79SDavid Howells #else 125117926a79SDavid Howells 125217926a79SDavid Howells #define ASSERT(X) \ 125317926a79SDavid Howells do { \ 125417926a79SDavid Howells } while (0) 125517926a79SDavid Howells 125617926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 125717926a79SDavid Howells do { \ 125817926a79SDavid Howells } while (0) 125917926a79SDavid Howells 126017926a79SDavid Howells #define ASSERTIF(C, X) \ 126117926a79SDavid Howells do { \ 126217926a79SDavid Howells } while (0) 126317926a79SDavid Howells 126417926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 126517926a79SDavid Howells do { \ 126617926a79SDavid Howells } while (0) 126717926a79SDavid Howells 126817926a79SDavid Howells #endif /* __KDEBUGALL */ 1269