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 3050d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 306cf1a6474SDavid Howells u64 rtt; /* Current RTT estimate (in nS) */ 307cf1a6474SDavid Howells u64 rtt_sum; /* Sum of cache contents */ 308cf1a6474SDavid Howells u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 309cf1a6474SDavid Howells u8 rtt_cursor; /* next entry at which to insert */ 310cf1a6474SDavid Howells u8 rtt_usage; /* amount of cache actually used */ 311f7aec129SDavid Howells 312f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 31317926a79SDavid Howells }; 31417926a79SDavid Howells 31517926a79SDavid Howells /* 31619ffa01cSDavid Howells * Keys for matching a connection. 31719ffa01cSDavid Howells */ 31819ffa01cSDavid Howells struct rxrpc_conn_proto { 319e8d70ce1SDavid Howells union { 320e8d70ce1SDavid Howells struct { 32119ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 32219ffa01cSDavid Howells u32 cid; /* connection ID */ 323e8d70ce1SDavid Howells }; 324e8d70ce1SDavid Howells u64 index_key; 32519ffa01cSDavid Howells }; 32619ffa01cSDavid Howells }; 32719ffa01cSDavid Howells 32819ffa01cSDavid Howells struct rxrpc_conn_parameters { 32919ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 33019ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 33119ffa01cSDavid Howells struct key *key; /* Security details */ 33219ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3334e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 33419ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 33519ffa01cSDavid Howells u32 security_level; /* Security level selected */ 33619ffa01cSDavid Howells }; 33719ffa01cSDavid Howells 33819ffa01cSDavid Howells /* 339bba304dbSDavid Howells * Bits in the connection flags. 340bba304dbSDavid Howells */ 341bba304dbSDavid Howells enum rxrpc_conn_flag { 342bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 343001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 344001c1122SDavid Howells RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 34545025bceSDavid Howells RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 34645025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 34745025bceSDavid Howells RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 3484e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3493136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3503136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3513136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3523136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 353bba304dbSDavid Howells }; 354bba304dbSDavid Howells 3553136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3563136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3573136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3583136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3593136ef49SDavid Howells 360bba304dbSDavid Howells /* 361bba304dbSDavid Howells * Events that can be raised upon a connection. 362bba304dbSDavid Howells */ 363bba304dbSDavid Howells enum rxrpc_conn_event { 364bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 365bba304dbSDavid Howells }; 366bba304dbSDavid Howells 367bba304dbSDavid Howells /* 36845025bceSDavid Howells * The connection cache state. 36945025bceSDavid Howells */ 37045025bceSDavid Howells enum rxrpc_conn_cache_state { 37145025bceSDavid Howells RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 37245025bceSDavid Howells RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 37345025bceSDavid Howells RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 3744e255721SDavid Howells RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 37545025bceSDavid Howells RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 37645025bceSDavid Howells RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 377363deeabSDavid Howells RXRPC_CONN__NR_CACHE_STATES 37845025bceSDavid Howells }; 37945025bceSDavid Howells 38045025bceSDavid Howells /* 381bba304dbSDavid Howells * The connection protocol state. 382bba304dbSDavid Howells */ 383bba304dbSDavid Howells enum rxrpc_conn_proto_state { 384bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 385bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 38600e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 387bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 388bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 389bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 390bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 391bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 392bba304dbSDavid Howells RXRPC_CONN__NR_STATES 393bba304dbSDavid Howells }; 394bba304dbSDavid Howells 395bba304dbSDavid Howells /* 39617926a79SDavid Howells * RxRPC connection definition 397aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 39817926a79SDavid Howells * - each connection can only handle four simultaneous calls 39917926a79SDavid Howells */ 40017926a79SDavid Howells struct rxrpc_connection { 40119ffa01cSDavid Howells struct rxrpc_conn_proto proto; 40219ffa01cSDavid Howells struct rxrpc_conn_parameters params; 40319ffa01cSDavid Howells 40445025bceSDavid Howells atomic_t usage; 40545025bceSDavid Howells struct rcu_head rcu; 40645025bceSDavid Howells struct list_head cache_link; 407a1399f8bSDavid Howells 40845025bceSDavid Howells spinlock_t channel_lock; 40945025bceSDavid Howells unsigned char active_chans; /* Mask of active channels */ 41045025bceSDavid Howells #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 41145025bceSDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 412a1399f8bSDavid Howells struct rxrpc_channel { 4133136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 414a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4154764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 416a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 417a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 418a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 41918bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 42018bfeba5SDavid Howells union { 42118bfeba5SDavid Howells u32 last_seq; 42218bfeba5SDavid Howells u32 last_abort; 42318bfeba5SDavid Howells }; 424a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 425999b69f8SDavid Howells 4263136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 42717926a79SDavid Howells struct work_struct processor; /* connection event processor */ 428999b69f8SDavid Howells union { 429999b69f8SDavid Howells struct rb_node client_node; /* Node in local->client_conns */ 430aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 431999b69f8SDavid Howells }; 4324d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 43317926a79SDavid Howells struct list_head link; /* link in master connection list */ 43417926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 435648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 43617926a79SDavid Howells struct key *server_key; /* security for this service */ 4371afe593bSHerbert Xu struct crypto_skcipher *cipher; /* encryption handle */ 43817926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 4394a3388c8SDavid Howells unsigned long flags; 44017926a79SDavid Howells unsigned long events; 441f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 44217926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 443cf13258fSDavid Howells enum rxrpc_conn_cache_state cache_state; 444cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 445dc44b3a0SDavid Howells u32 local_abort; /* local abort code */ 446dc44b3a0SDavid Howells u32 remote_abort; /* remote abort code */ 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 */ 45168d6d1aeSDavid Howells u16 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 */ 45617926a79SDavid Howells }; 45717926a79SDavid Howells 458dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 459dc71db34SDavid Howells { 460dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 461dc71db34SDavid Howells } 462dc71db34SDavid Howells 463dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 464dc71db34SDavid Howells { 465dc71db34SDavid Howells return !rxrpc_to_server(sp); 466dc71db34SDavid Howells } 467dc71db34SDavid Howells 46817926a79SDavid Howells /* 4695b8848d1SDavid Howells * Flags in call->flags. 4705b8848d1SDavid Howells */ 4715b8848d1SDavid Howells enum rxrpc_call_flag { 4725b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4735b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 474dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 47545025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 476248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 477248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 478c038a58cSDavid Howells RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ 479a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 4808e83134dSDavid Howells RXRPC_CALL_PINGING, /* Ping in process */ 48157494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 482c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 4831a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 484d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 4855b8848d1SDavid Howells }; 4865b8848d1SDavid Howells 4875b8848d1SDavid Howells /* 4885b8848d1SDavid Howells * Events that can be raised on a call. 4895b8848d1SDavid Howells */ 4905b8848d1SDavid Howells enum rxrpc_call_event { 4914c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 4924c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 4934c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 494a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 495a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 496bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 4975b8848d1SDavid Howells }; 4985b8848d1SDavid Howells 4995b8848d1SDavid Howells /* 5005b8848d1SDavid Howells * The states that a call can be in. 5015b8848d1SDavid Howells */ 5025b8848d1SDavid Howells enum rxrpc_call_state { 503999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 504999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5055b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5065b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5075b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 50800e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5095b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5105b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 5115b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5125b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5135b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5145b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 515f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 516f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 517f5c17aaeSDavid Howells }; 518f5c17aaeSDavid Howells 519f5c17aaeSDavid Howells /* 52057494343SDavid Howells * Call Tx congestion management modes. 52157494343SDavid Howells */ 52257494343SDavid Howells enum rxrpc_congest_mode { 52357494343SDavid Howells RXRPC_CALL_SLOW_START, 52457494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 52557494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 52657494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 52757494343SDavid Howells NR__RXRPC_CONGEST_MODES 52857494343SDavid Howells }; 52957494343SDavid Howells 53057494343SDavid Howells /* 53117926a79SDavid Howells * RxRPC call definition 53217926a79SDavid Howells * - matched by { connection, call_id } 53317926a79SDavid Howells */ 53417926a79SDavid Howells struct rxrpc_call { 535dee46364SDavid Howells struct rcu_head rcu; 53617926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 537df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5388d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 539d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 540540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 541a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 542bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 543a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 544a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 545415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 546a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 547a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 548a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 549a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 550a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 551248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 552248f219cSDavid Howells struct work_struct processor; /* Event processor */ 553d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 55417926a79SDavid Howells struct list_head link; /* link in master call list */ 55545025bceSDavid Howells struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 556f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 557248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 558248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 559248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 560248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 56117926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 56245025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 563e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 564a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 56517926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 56617926a79SDavid Howells unsigned long flags; 56717926a79SDavid Howells unsigned long events; 56817926a79SDavid Howells spinlock_t lock; 56920acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 57017926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 571f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 572f5c17aaeSDavid Howells int error; /* Local error incurred */ 573cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 574cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 57517926a79SDavid Howells atomic_t usage; 576dabe5a79SDavid Howells u16 service_id; /* service ID */ 577278ac0cdSDavid Howells u8 security_ix; /* Security type */ 578dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 579dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 580dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 5818e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 5828e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 58317926a79SDavid Howells 584248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 585248f219cSDavid Howells * 586248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 587248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 588248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 589248f219cSDavid Howells * 590248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 591248f219cSDavid Howells * acked. 59217926a79SDavid Howells */ 593248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 594248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 5954075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 596248f219cSDavid Howells struct sk_buff **rxtx_buffer; 597248f219cSDavid Howells u8 *rxtx_annotations; 598248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 599248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 600248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 601248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 602f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 60370790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 60470790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 60570790dbeSDavid Howells 606248f219cSDavid Howells #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ 607248f219cSDavid Howells #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ 608248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 609248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 610248f219cSDavid Howells * not hard-ACK'd packet follows this. 611248f219cSDavid Howells */ 612248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 61357494343SDavid Howells 61457494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 61557494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 61657494343SDavid Howells * packets) rather than bytes. 61757494343SDavid Howells */ 61857494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 61957494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 62057494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 62157494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 62257494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 62357494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 62457494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 62557494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 62657494343SDavid Howells 627248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 628248f219cSDavid Howells * consumed packet follows this. 629248f219cSDavid Howells */ 630248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 631248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6321a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 633248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 634248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 63571f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 63675e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 63717926a79SDavid Howells 63817926a79SDavid Howells /* receive-phase ACK management */ 6394e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 640563ea7d5SDavid Howells u16 ackr_skew; /* skew on packet being ACK'd */ 6410d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 642248f219cSDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 643805b21b9SDavid Howells rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 644805b21b9SDavid Howells rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 645a5af7e1fSDavid Howells 646a5af7e1fSDavid Howells /* ping management */ 647a5af7e1fSDavid Howells rxrpc_serial_t ping_serial; /* Last ping sent */ 648a5af7e1fSDavid Howells ktime_t ping_time; /* Time last ping sent */ 64917926a79SDavid Howells 650248f219cSDavid Howells /* transmission-phase ACK management */ 65157494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 652248f219cSDavid Howells rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 65331a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 654bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 655bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 65631a1b989SDavid Howells }; 65731a1b989SDavid Howells 65831a1b989SDavid Howells /* 65957494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 66031a1b989SDavid Howells */ 66131a1b989SDavid Howells struct rxrpc_ack_summary { 66231a1b989SDavid Howells u8 ack_reason; 66331a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 66431a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 66531a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 66631a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 66731a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 66831a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 66957494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 67057494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 67157494343SDavid Howells /* Place to stash values for tracing */ 67257494343SDavid Howells enum rxrpc_congest_mode mode:8; 67357494343SDavid Howells u8 cwnd; 67457494343SDavid Howells u8 ssthresh; 67557494343SDavid Howells u8 dup_acks; 67657494343SDavid Howells u8 cumulative_acks; 67717926a79SDavid Howells }; 67817926a79SDavid Howells 67948124178SDavid Howells /* 68048124178SDavid Howells * sendmsg() cmsg-specified parameters. 68148124178SDavid Howells */ 68248124178SDavid Howells enum rxrpc_command { 68348124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 68448124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 68548124178SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 68648124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 68748124178SDavid Howells }; 68848124178SDavid Howells 68948124178SDavid Howells struct rxrpc_call_params { 69048124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 69148124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 69248124178SDavid Howells struct { 69348124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 69448124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 69548124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 69648124178SDavid Howells } timeouts; 69748124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 69848124178SDavid Howells }; 69948124178SDavid Howells 70048124178SDavid Howells struct rxrpc_send_params { 70148124178SDavid Howells struct rxrpc_call_params call; 70248124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 70348124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 70448124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 70548124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 70648124178SDavid Howells }; 70748124178SDavid Howells 708df844fd4SDavid Howells #include <trace/events/rxrpc.h> 709df844fd4SDavid Howells 71017926a79SDavid Howells /* 711651350d1SDavid Howells * af_rxrpc.c 71217926a79SDavid Howells */ 71371f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 714651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 71517926a79SDavid Howells 71617926a79SDavid Howells /* 7170d81a51aSDavid Howells * call_accept.c 71817926a79SDavid Howells */ 71900e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 72000e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 721248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7220099dc58SDavid Howells struct rxrpc_sock *, 7230099dc58SDavid Howells struct rxrpc_peer *, 724248f219cSDavid Howells struct rxrpc_connection *, 725248f219cSDavid Howells struct sk_buff *); 7264f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 727d001648eSDavid Howells struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 728d001648eSDavid Howells rxrpc_notify_rx_t); 729c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 73017926a79SDavid Howells 73117926a79SDavid Howells /* 7320d81a51aSDavid Howells * call_event.c 73317926a79SDavid Howells */ 7349c7ad434SDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, 7359c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 736c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 73717926a79SDavid Howells 738a158bdd3SDavid Howells static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 739a158bdd3SDavid Howells unsigned long expire_at, 740a158bdd3SDavid Howells unsigned long now, 741a158bdd3SDavid Howells enum rxrpc_timer_trace why) 742a158bdd3SDavid Howells { 743a158bdd3SDavid Howells trace_rxrpc_timer(call, why, now); 744a158bdd3SDavid Howells timer_reduce(&call->timer, expire_at); 745a158bdd3SDavid Howells } 746a158bdd3SDavid Howells 74717926a79SDavid Howells /* 7480d81a51aSDavid Howells * call_object.c 74917926a79SDavid Howells */ 750f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 751f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 752dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 75317926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 75417926a79SDavid Howells 7552341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 756a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7572341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 75819ffa01cSDavid Howells struct rxrpc_conn_parameters *, 759999b69f8SDavid Howells struct sockaddr_rxrpc *, 760a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 761a25e21f0SDavid Howells unsigned int); 762c038a58cSDavid Howells int rxrpc_retry_client_call(struct rxrpc_sock *, 763c038a58cSDavid Howells struct rxrpc_call *, 764c038a58cSDavid Howells struct rxrpc_conn_parameters *, 765c038a58cSDavid Howells struct sockaddr_rxrpc *, 766c038a58cSDavid Howells gfp_t); 767248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 76842886ffeSDavid Howells struct sk_buff *); 7698d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 770c038a58cSDavid Howells int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); 771c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 7728d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 7738d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 774e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 775fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 776fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 77700e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 7782baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 77917926a79SDavid Howells 780dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 781dabe5a79SDavid Howells { 782dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 783dabe5a79SDavid Howells } 784dabe5a79SDavid Howells 785dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 786dabe5a79SDavid Howells { 787dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 788dabe5a79SDavid Howells } 789dabe5a79SDavid Howells 79017926a79SDavid Howells /* 791f5c17aaeSDavid Howells * Transition a call to the complete state. 792f5c17aaeSDavid Howells */ 793f5c17aaeSDavid Howells static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 794f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 795f5c17aaeSDavid Howells u32 abort_code, 796f5c17aaeSDavid Howells int error) 797f5c17aaeSDavid Howells { 798f5c17aaeSDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 799f5c17aaeSDavid Howells call->abort_code = abort_code; 800f5c17aaeSDavid Howells call->error = error; 801f5c17aaeSDavid Howells call->completion = compl, 802f5c17aaeSDavid Howells call->state = RXRPC_CALL_COMPLETE; 8031bae5d22SDavid Howells trace_rxrpc_call_complete(call); 804c0d058c2SDavid Howells wake_up(&call->waitq); 805f5c17aaeSDavid Howells return true; 806f5c17aaeSDavid Howells } 807f5c17aaeSDavid Howells return false; 808f5c17aaeSDavid Howells } 809f5c17aaeSDavid Howells 810f5c17aaeSDavid Howells static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 811f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 812f5c17aaeSDavid Howells u32 abort_code, 813f5c17aaeSDavid Howells int error) 814f5c17aaeSDavid Howells { 815e8d6bbb0SDavid Howells bool ret; 816f5c17aaeSDavid Howells 817f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 818f5c17aaeSDavid Howells ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 819f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 820f5c17aaeSDavid Howells return ret; 821f5c17aaeSDavid Howells } 822f5c17aaeSDavid Howells 823f5c17aaeSDavid Howells /* 824f5c17aaeSDavid Howells * Record that a call successfully completed. 825f5c17aaeSDavid Howells */ 826e8d6bbb0SDavid Howells static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 827f5c17aaeSDavid Howells { 828e8d6bbb0SDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 829f5c17aaeSDavid Howells } 830f5c17aaeSDavid Howells 831e8d6bbb0SDavid Howells static inline bool rxrpc_call_completed(struct rxrpc_call *call) 832f5c17aaeSDavid Howells { 833e8d6bbb0SDavid Howells bool ret; 834e8d6bbb0SDavid Howells 835f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 836e8d6bbb0SDavid Howells ret = __rxrpc_call_completed(call); 837f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 838e8d6bbb0SDavid Howells return ret; 839f5c17aaeSDavid Howells } 840f5c17aaeSDavid Howells 841f5c17aaeSDavid Howells /* 842f5c17aaeSDavid Howells * Record that a call is locally aborted. 843f5c17aaeSDavid Howells */ 8445a42976dSDavid Howells static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8455a42976dSDavid Howells rxrpc_seq_t seq, 846f5c17aaeSDavid Howells u32 abort_code, int error) 847f5c17aaeSDavid Howells { 848a25e21f0SDavid Howells trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 8495a42976dSDavid Howells abort_code, error); 850248f219cSDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 851248f219cSDavid Howells abort_code, error); 852f5c17aaeSDavid Howells } 853f5c17aaeSDavid Howells 8545a42976dSDavid Howells static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8555a42976dSDavid Howells rxrpc_seq_t seq, u32 abort_code, int error) 856f5c17aaeSDavid Howells { 857f5c17aaeSDavid Howells bool ret; 858f5c17aaeSDavid Howells 859f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 8605a42976dSDavid Howells ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 861f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 862f5c17aaeSDavid Howells return ret; 863f5c17aaeSDavid Howells } 864f5c17aaeSDavid Howells 865f5c17aaeSDavid Howells /* 866fb46f6eeSDavid Howells * Abort a call due to a protocol error. 867fb46f6eeSDavid Howells */ 868fb46f6eeSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 869fb46f6eeSDavid Howells struct sk_buff *skb, 870fb46f6eeSDavid Howells const char *eproto_why, 871fb46f6eeSDavid Howells const char *why, 872fb46f6eeSDavid Howells u32 abort_code) 873fb46f6eeSDavid Howells { 874fb46f6eeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 875fb46f6eeSDavid Howells 876fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 877fb46f6eeSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 878fb46f6eeSDavid Howells } 879fb46f6eeSDavid Howells 880fb46f6eeSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 881fb46f6eeSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 882fb46f6eeSDavid Howells (abort_why), (abort_code)) 883fb46f6eeSDavid Howells 884fb46f6eeSDavid Howells /* 8854a3388c8SDavid Howells * conn_client.c 8864a3388c8SDavid Howells */ 88745025bceSDavid Howells extern unsigned int rxrpc_max_client_connections; 88845025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 889a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 890a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8914a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8924a3388c8SDavid Howells 893eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 894c6d2b8d7SDavid Howells int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, 895c6d2b8d7SDavid Howells struct sockaddr_rxrpc *, gfp_t); 89645025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 89745025bceSDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_call *); 89845025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 8992baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 9002baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 9014a3388c8SDavid Howells 9024a3388c8SDavid Howells /* 9030d81a51aSDavid Howells * conn_event.c 9040d81a51aSDavid Howells */ 9050d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 9060d81a51aSDavid Howells 9070d81a51aSDavid Howells /* 9080d81a51aSDavid Howells * conn_object.c 90917926a79SDavid Howells */ 910dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 911f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 91217926a79SDavid Howells 913c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 9148496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 9150099dc58SDavid Howells struct sk_buff *, 9160099dc58SDavid Howells struct rxrpc_peer **); 91745025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 918999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 91945025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 920363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 921363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 922363deeabSDavid Howells void rxrpc_get_connection(struct rxrpc_connection *); 923363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 924363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 9252baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 9262baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 92717926a79SDavid Howells 92819ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 92919ffa01cSDavid Howells { 93019ffa01cSDavid Howells return conn->out_clientflag; 93119ffa01cSDavid Howells } 93219ffa01cSDavid Howells 93319ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 93419ffa01cSDavid Howells { 935e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 93619ffa01cSDavid Howells } 93719ffa01cSDavid Howells 938f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 939f51b4480SDavid Howells { 94045025bceSDavid Howells if (!conn) 94145025bceSDavid Howells return; 94245025bceSDavid Howells 943363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 94445025bceSDavid Howells rxrpc_put_client_conn(conn); 945363deeabSDavid Howells else 946363deeabSDavid Howells rxrpc_put_service_conn(conn); 9475acbee46SDavid Howells } 9485acbee46SDavid Howells 9493136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9503136ef49SDavid Howells unsigned long expire_at) 9513136ef49SDavid Howells { 9523136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9533136ef49SDavid Howells } 9543136ef49SDavid Howells 95517926a79SDavid Howells /* 9567877a4a4SDavid Howells * conn_service.c 9577877a4a4SDavid Howells */ 9588496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9598496af50SDavid Howells struct sk_buff *); 9602baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 9614722974dSDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, 9624722974dSDavid Howells struct rxrpc_connection *, struct sk_buff *); 963001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9647877a4a4SDavid Howells 9657877a4a4SDavid Howells /* 9660d81a51aSDavid Howells * input.c 96717926a79SDavid Howells */ 968676d2369SDavid S. Miller void rxrpc_data_ready(struct sock *); 96917926a79SDavid Howells 97017926a79SDavid Howells /* 9710d81a51aSDavid Howells * insecure.c 97217926a79SDavid Howells */ 9730d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 97417926a79SDavid Howells 97517926a79SDavid Howells /* 9760d81a51aSDavid Howells * key.c 97717926a79SDavid Howells */ 97817926a79SDavid Howells extern struct key_type key_type_rxrpc; 97917926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 98017926a79SDavid Howells 981c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 982c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 98310674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 984c1b1203dSJoe Perches u32); 98517926a79SDavid Howells 98617926a79SDavid Howells /* 98787563616SDavid Howells * local_event.c 98887563616SDavid Howells */ 9894f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 99087563616SDavid Howells 99187563616SDavid Howells /* 9920d81a51aSDavid Howells * local_object.c 99317926a79SDavid Howells */ 9942baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 99509d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 99609d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 99709d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 99809d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 9992baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 1000e0e4d82fSDavid Howells 1001e0e4d82fSDavid Howells /* 10028e688d9cSDavid Howells * misc.c 10038e688d9cSDavid Howells */ 10040e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 1005a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 1006a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 1007a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 10088e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 10098e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 10108e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 1011a158bdd3SDavid Howells extern unsigned long rxrpc_resend_timeout; 10128e688d9cSDavid Howells 10138e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 10148e688d9cSDavid Howells 10158e688d9cSDavid Howells /* 10162baec2c3SDavid Howells * net_ns.c 10172baec2c3SDavid Howells */ 10182baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 10192baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 10202baec2c3SDavid Howells 10212baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 10222baec2c3SDavid Howells { 10232baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 10242baec2c3SDavid Howells } 10252baec2c3SDavid Howells 10262baec2c3SDavid Howells /* 10270d81a51aSDavid Howells * output.c 10280d81a51aSDavid Howells */ 1029bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 103026cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 1031a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1032248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 1033ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 10340d81a51aSDavid Howells 10350d81a51aSDavid Howells /* 1036abe89ef0SDavid Howells * peer_event.c 10370d81a51aSDavid Howells */ 1038abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1039cf1a6474SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1040cf1a6474SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1041ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10420d81a51aSDavid Howells 10430d81a51aSDavid Howells /* 10440d81a51aSDavid Howells * peer_object.c 10450d81a51aSDavid Howells */ 1046be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1047be6e6707SDavid Howells const struct sockaddr_rxrpc *); 1048be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, 1049be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1050be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10510099dc58SDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_local *, struct rxrpc_peer *); 105217226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10531159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10541159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10551159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 10560d81a51aSDavid Howells 10570d81a51aSDavid Howells /* 10580d81a51aSDavid Howells * proc.c 10590d81a51aSDavid Howells */ 1060c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1061c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 10620d81a51aSDavid Howells 10630d81a51aSDavid Howells /* 10640d81a51aSDavid Howells * recvmsg.c 10650d81a51aSDavid Howells */ 1066248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10670d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10680d81a51aSDavid Howells 10690d81a51aSDavid Howells /* 1070648af7fcSDavid Howells * rxkad.c 1071648af7fcSDavid Howells */ 1072648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1073648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1074648af7fcSDavid Howells #endif 1075648af7fcSDavid Howells 1076648af7fcSDavid Howells /* 10770d81a51aSDavid Howells * security.c 10780d81a51aSDavid Howells */ 10790d81a51aSDavid Howells int __init rxrpc_init_security(void); 10800d81a51aSDavid Howells void rxrpc_exit_security(void); 10810d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 10820d81a51aSDavid Howells int rxrpc_init_server_conn_security(struct rxrpc_connection *); 10830d81a51aSDavid Howells 10840d81a51aSDavid Howells /* 10850b58b8a1SDavid Howells * sendmsg.c 10860b58b8a1SDavid Howells */ 10870b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 10880b58b8a1SDavid Howells 10890b58b8a1SDavid Howells /* 10900d81a51aSDavid Howells * skbuff.c 10910d81a51aSDavid Howells */ 1092d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 10930d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 109471f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 109571f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 109671f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 109771f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1098df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 10990d81a51aSDavid Howells 11000d81a51aSDavid Howells /* 11015873c083SDavid Howells * sysctl.c 11025873c083SDavid Howells */ 11035873c083SDavid Howells #ifdef CONFIG_SYSCTL 11045873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11055873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11065873c083SDavid Howells #else 11075873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11085873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11095873c083SDavid Howells #endif 11105873c083SDavid Howells 11115873c083SDavid Howells /* 1112be6e6707SDavid Howells * utils.c 1113be6e6707SDavid Howells */ 11145a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1115be6e6707SDavid Howells 1116248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1117248f219cSDavid Howells { 1118248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1119248f219cSDavid Howells } 1120248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1121248f219cSDavid Howells { 1122248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1123248f219cSDavid Howells } 1124248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1125248f219cSDavid Howells { 1126248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1127248f219cSDavid Howells } 1128248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1129248f219cSDavid Howells { 1130248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1131248f219cSDavid Howells } 1132248f219cSDavid Howells 1133be6e6707SDavid Howells /* 113417926a79SDavid Howells * debug tracing 113517926a79SDavid Howells */ 113695c96174SEric Dumazet extern unsigned int rxrpc_debug; 113717926a79SDavid Howells 113817926a79SDavid Howells #define dbgprintk(FMT,...) \ 11399f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 114017926a79SDavid Howells 11410dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11420dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 114317926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 114417926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 114517926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 114617926a79SDavid Howells 114717926a79SDavid Howells 114817926a79SDavid Howells #if defined(__KDEBUG) 114917926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 115017926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 115117926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 115217926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 115317926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 115417926a79SDavid Howells 115517926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 115617926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 115717926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 115817926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 115917926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 116017926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 116117926a79SDavid Howells 116217926a79SDavid Howells #define _enter(FMT,...) \ 116317926a79SDavid Howells do { \ 116417926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 116517926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 116617926a79SDavid Howells } while (0) 116717926a79SDavid Howells 116817926a79SDavid Howells #define _leave(FMT,...) \ 116917926a79SDavid Howells do { \ 117017926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 117117926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 117217926a79SDavid Howells } while (0) 117317926a79SDavid Howells 117417926a79SDavid Howells #define _debug(FMT,...) \ 117517926a79SDavid Howells do { \ 117617926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 117717926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 117817926a79SDavid Howells } while (0) 117917926a79SDavid Howells 118017926a79SDavid Howells #define _proto(FMT,...) \ 118117926a79SDavid Howells do { \ 118217926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 118317926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 118417926a79SDavid Howells } while (0) 118517926a79SDavid Howells 118617926a79SDavid Howells #define _net(FMT,...) \ 118717926a79SDavid Howells do { \ 118817926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 118917926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 119017926a79SDavid Howells } while (0) 119117926a79SDavid Howells 119217926a79SDavid Howells #else 119312fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 119412fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 119512fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 119612fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 119712fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 119817926a79SDavid Howells #endif 119917926a79SDavid Howells 120017926a79SDavid Howells /* 120117926a79SDavid Howells * debug assertion checking 120217926a79SDavid Howells */ 120317926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 120417926a79SDavid Howells 120517926a79SDavid Howells #define ASSERT(X) \ 120617926a79SDavid Howells do { \ 120717926a79SDavid Howells if (unlikely(!(X))) { \ 12089b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 120917926a79SDavid Howells BUG(); \ 121017926a79SDavid Howells } \ 121117926a79SDavid Howells } while (0) 121217926a79SDavid Howells 121317926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 121417926a79SDavid Howells do { \ 1215cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1216cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12179b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12189b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1219cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1220cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 122117926a79SDavid Howells BUG(); \ 122217926a79SDavid Howells } \ 122317926a79SDavid Howells } while (0) 122417926a79SDavid Howells 122517926a79SDavid Howells #define ASSERTIF(C, X) \ 122617926a79SDavid Howells do { \ 122717926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12289b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 122917926a79SDavid Howells BUG(); \ 123017926a79SDavid Howells } \ 123117926a79SDavid Howells } while (0) 123217926a79SDavid Howells 123317926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 123417926a79SDavid Howells do { \ 1235cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1236cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12379b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12389b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1239cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1240cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 124117926a79SDavid Howells BUG(); \ 124217926a79SDavid Howells } \ 124317926a79SDavid Howells } while (0) 124417926a79SDavid Howells 124517926a79SDavid Howells #else 124617926a79SDavid Howells 124717926a79SDavid Howells #define ASSERT(X) \ 124817926a79SDavid Howells do { \ 124917926a79SDavid Howells } while (0) 125017926a79SDavid Howells 125117926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 125217926a79SDavid Howells do { \ 125317926a79SDavid Howells } while (0) 125417926a79SDavid Howells 125517926a79SDavid Howells #define ASSERTIF(C, X) \ 125617926a79SDavid Howells do { \ 125717926a79SDavid Howells } while (0) 125817926a79SDavid Howells 125917926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 126017926a79SDavid Howells do { \ 126117926a79SDavid Howells } while (0) 126217926a79SDavid Howells 126317926a79SDavid Howells #endif /* __KDEBUGALL */ 1264