12874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 217926a79SDavid Howells /* AF_RXRPC internal definitions 317926a79SDavid Howells * 417926a79SDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 517926a79SDavid Howells * Written by David Howells (dhowells@redhat.com) 617926a79SDavid Howells */ 717926a79SDavid Howells 8be6e6707SDavid Howells #include <linux/atomic.h> 98496af50SDavid Howells #include <linux/seqlock.h> 102baec2c3SDavid Howells #include <net/net_namespace.h> 112baec2c3SDavid Howells #include <net/netns/generic.h> 12e0e4d82fSDavid Howells #include <net/sock.h> 13be6e6707SDavid Howells #include <net/af_rxrpc.h> 14ddc6c70fSDavid Howells #include "protocol.h" 1517926a79SDavid Howells 1617926a79SDavid Howells #if 0 1717926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 1817926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 1917926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 2017926a79SDavid Howells #else 2117926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2217926a79SDavid Howells #endif 2317926a79SDavid Howells 2417926a79SDavid Howells #define FCRYPT_BSIZE 8 2517926a79SDavid Howells struct rxrpc_crypt { 2617926a79SDavid Howells union { 2717926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 2891e916cfSAl Viro __be32 n[2]; 2917926a79SDavid Howells }; 3017926a79SDavid Howells } __attribute__((aligned(8))); 3117926a79SDavid Howells 32651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 33651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 34651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 35651350d1SDavid Howells 36cc8feb8eSDavid Howells struct rxrpc_connection; 37cc8feb8eSDavid Howells 3817926a79SDavid Howells /* 39ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 40ece64fecSDavid Howells * to pass supplementary information. 41d001648eSDavid Howells */ 42d001648eSDavid Howells enum rxrpc_skb_mark { 43ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 44ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 45d001648eSDavid Howells }; 46d001648eSDavid Howells 47d001648eSDavid Howells /* 4817926a79SDavid Howells * sk_state for RxRPC sockets 4917926a79SDavid Howells */ 5017926a79SDavid Howells enum { 512341e077SDavid Howells RXRPC_UNBOUND = 0, 522341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 5317926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 5417926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5528036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 5617926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 57210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 5817926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 5917926a79SDavid Howells }; 6017926a79SDavid Howells 6117926a79SDavid Howells /* 622baec2c3SDavid Howells * Per-network namespace data. 632baec2c3SDavid Howells */ 642baec2c3SDavid Howells struct rxrpc_net { 652baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 662baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 672baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 682baec2c3SDavid Howells rwlock_t call_lock; /* Lock for ->calls */ 69d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 702baec2c3SDavid Howells 7131f5f9a1SDavid Howells atomic_t nr_conns; 722baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 732baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 742baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 753d18cbb7SDavid Howells struct work_struct service_conn_reaper; 763d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 772baec2c3SDavid Howells 782baec2c3SDavid Howells unsigned int nr_client_conns; 792baec2c3SDavid Howells unsigned int nr_active_client_conns; 802baec2c3SDavid Howells bool kill_all_client_conns; 81f859ab61SDavid Howells bool live; 822baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 832baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 842baec2c3SDavid Howells struct list_head waiting_client_conns; 852baec2c3SDavid Howells struct list_head active_client_conns; 862baec2c3SDavid Howells struct list_head idle_client_conns; 873d18cbb7SDavid Howells struct work_struct client_conn_reaper; 883d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 892baec2c3SDavid Howells 902baec2c3SDavid Howells struct list_head local_endpoints; 912baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 922baec2c3SDavid Howells 932baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 94ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 95ace45becSDavid Howells 96ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 97ace45becSDavid Howells u8 peer_keepalive_cursor; 98330bdcfaSDavid Howells time64_t peer_keepalive_base; 99330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 100330bdcfaSDavid Howells struct list_head peer_keepalive_new; 101ace45becSDavid Howells struct timer_list peer_keepalive_timer; 102ace45becSDavid Howells struct work_struct peer_keepalive_work; 1032baec2c3SDavid Howells }; 1042baec2c3SDavid Howells 1052baec2c3SDavid Howells /* 10600e90712SDavid Howells * Service backlog preallocation. 10700e90712SDavid Howells * 10800e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 10900e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 11000e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 11100e90712SDavid Howells * shuffle packets around so much. 11200e90712SDavid Howells */ 11300e90712SDavid Howells struct rxrpc_backlog { 11400e90712SDavid Howells unsigned short peer_backlog_head; 11500e90712SDavid Howells unsigned short peer_backlog_tail; 11600e90712SDavid Howells unsigned short conn_backlog_head; 11700e90712SDavid Howells unsigned short conn_backlog_tail; 11800e90712SDavid Howells unsigned short call_backlog_head; 11900e90712SDavid Howells unsigned short call_backlog_tail; 12000e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 12100e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 12200e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 12300e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 12400e90712SDavid Howells }; 12500e90712SDavid Howells 12600e90712SDavid Howells /* 12717926a79SDavid Howells * RxRPC socket definition 12817926a79SDavid Howells */ 12917926a79SDavid Howells struct rxrpc_sock { 13017926a79SDavid Howells /* WARNING: sk has to be the first member */ 13117926a79SDavid Howells struct sock sk; 132d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 13300e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 13417926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 13500e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 136248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 137248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 138248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 139248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 140248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 14117926a79SDavid Howells struct key *key; /* security for this socket */ 14217926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 14300e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 14417926a79SDavid Howells unsigned long flags; 1452341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 14617926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 14717926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 14817926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 149cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 15028036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1514722974dSDavid Howells struct { 1524722974dSDavid Howells /* Service upgrade information */ 1534722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1544722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1554722974dSDavid Howells } service_upgrade; 156cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1574722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1582341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 15917926a79SDavid Howells }; 16017926a79SDavid Howells 16117926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 16217926a79SDavid Howells 16317926a79SDavid Howells /* 1640d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1650d12f8a4SDavid Howells */ 1660d12f8a4SDavid Howells struct rxrpc_host_header { 1670d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1680d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1690d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1700d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1710d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1720d12f8a4SDavid Howells u8 type; /* packet type */ 1730d12f8a4SDavid Howells u8 flags; /* packet flags */ 1740d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1750d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1760d12f8a4SDavid Howells union { 1770d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1780d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1790d12f8a4SDavid Howells }; 1800d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1810d12f8a4SDavid Howells } __packed; 1820d12f8a4SDavid Howells 1830d12f8a4SDavid Howells /* 18417926a79SDavid Howells * RxRPC socket buffer private variables 18517926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 18617926a79SDavid Howells */ 18717926a79SDavid Howells struct rxrpc_skb_priv { 188987db9f7SDavid Howells atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 189c3c9e3dfSDavid Howells u8 nr_subpackets; /* Number of subpackets */ 190c3c9e3dfSDavid Howells u8 rx_flags; /* Received packet flags */ 191c3c9e3dfSDavid Howells #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 192b311e684SDavid Howells #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 19317926a79SDavid Howells union { 19417926a79SDavid Howells int remain; /* amount of space remaining for next write */ 195c3c9e3dfSDavid Howells 196c3c9e3dfSDavid Howells /* List of requested ACKs on subpackets */ 197c3c9e3dfSDavid Howells unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 198c3c9e3dfSDavid Howells BITS_PER_LONG]; 19917926a79SDavid Howells }; 20017926a79SDavid Howells 2010d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 20217926a79SDavid Howells }; 20317926a79SDavid Howells 20417926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 20517926a79SDavid Howells 20617926a79SDavid Howells /* 20717926a79SDavid Howells * RxRPC security module interface 20817926a79SDavid Howells */ 20917926a79SDavid Howells struct rxrpc_security { 21017926a79SDavid Howells const char *name; /* name of this service */ 21117926a79SDavid Howells u8 security_index; /* security type provided */ 212063c60d3SDavid Howells u32 no_key_abort; /* Abort code indicating no key */ 21317926a79SDavid Howells 214648af7fcSDavid Howells /* Initialise a security service */ 215648af7fcSDavid Howells int (*init)(void); 216648af7fcSDavid Howells 217648af7fcSDavid Howells /* Clean up a security service */ 218648af7fcSDavid Howells void (*exit)(void); 219648af7fcSDavid Howells 22017926a79SDavid Howells /* initialise a connection's security */ 22117926a79SDavid Howells int (*init_connection_security)(struct rxrpc_connection *); 22217926a79SDavid Howells 22317926a79SDavid Howells /* prime a connection's packet security */ 224a263629dSHerbert Xu int (*prime_packet_security)(struct rxrpc_connection *); 22517926a79SDavid Howells 22617926a79SDavid Howells /* impose security on a packet */ 227a263629dSHerbert Xu int (*secure_packet)(struct rxrpc_call *, 22817926a79SDavid Howells struct sk_buff *, 22917926a79SDavid Howells size_t, 23017926a79SDavid Howells void *); 23117926a79SDavid Howells 23217926a79SDavid Howells /* verify the security on a received packet */ 2335a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 234248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 235248f219cSDavid Howells 2361db88c53SDavid Howells /* Free crypto request on a call */ 2371db88c53SDavid Howells void (*free_call_crypto)(struct rxrpc_call *); 2381db88c53SDavid Howells 239248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 240248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 241248f219cSDavid Howells unsigned int *, unsigned int *); 24217926a79SDavid Howells 24317926a79SDavid Howells /* issue a challenge */ 24417926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 24517926a79SDavid Howells 24617926a79SDavid Howells /* respond to a challenge */ 24717926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 24817926a79SDavid Howells struct sk_buff *, 24917926a79SDavid Howells u32 *); 25017926a79SDavid Howells 25117926a79SDavid Howells /* verify a response */ 25217926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 25317926a79SDavid Howells struct sk_buff *, 25417926a79SDavid Howells u32 *); 25517926a79SDavid Howells 25617926a79SDavid Howells /* clear connection security */ 25717926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 25817926a79SDavid Howells }; 25917926a79SDavid Howells 26017926a79SDavid Howells /* 2614f95dd78SDavid Howells * RxRPC local transport endpoint description 2624f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2634f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 26417926a79SDavid Howells */ 26517926a79SDavid Howells struct rxrpc_local { 2664f95dd78SDavid Howells struct rcu_head rcu; 267730c5fd4SDavid Howells atomic_t active_users; /* Number of users of the local endpoint */ 268730c5fd4SDavid Howells atomic_t usage; /* Number of references to the structure */ 2692baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 2704f95dd78SDavid Howells struct list_head link; 27117926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2724f95dd78SDavid Howells struct work_struct processor; 2731e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 27417926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 27517926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 27644ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 277999b69f8SDavid Howells struct rb_root client_conns; /* Client connections by socket params */ 278999b69f8SDavid Howells spinlock_t client_conns_lock; /* Lock for client_conns */ 27917926a79SDavid Howells spinlock_t lock; /* access lock */ 28017926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 28117926a79SDavid Howells int debug_id; /* debug ID for printks */ 2824f95dd78SDavid Howells bool dead; 283f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 28417926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 28517926a79SDavid Howells }; 28617926a79SDavid Howells 28717926a79SDavid Howells /* 28817926a79SDavid Howells * RxRPC remote transport endpoint definition 289be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 29017926a79SDavid Howells */ 29117926a79SDavid Howells struct rxrpc_peer { 292be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 293be6e6707SDavid Howells atomic_t usage; 294be6e6707SDavid Howells unsigned long hash_key; 295be6e6707SDavid Howells struct hlist_node hash_link; 296be6e6707SDavid Howells struct rxrpc_local *local; 297f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 298aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 299330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 300ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 3018496af50SDavid Howells seqlock_t service_conn_lock; 30217926a79SDavid Howells spinlock_t lock; /* access lock */ 30395c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 30495c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 30595c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 30617926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 30717926a79SDavid Howells int debug_id; /* debug ID for printks */ 30817926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 30917926a79SDavid Howells 31017926a79SDavid Howells /* calculated RTT cache */ 31117926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 312c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3130d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 314cf1a6474SDavid Howells u64 rtt; /* Current RTT estimate (in nS) */ 315cf1a6474SDavid Howells u64 rtt_sum; /* Sum of cache contents */ 316cf1a6474SDavid Howells u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ 317cf1a6474SDavid Howells u8 rtt_cursor; /* next entry at which to insert */ 318cf1a6474SDavid Howells u8 rtt_usage; /* amount of cache actually used */ 319f7aec129SDavid Howells 320f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 32117926a79SDavid Howells }; 32217926a79SDavid Howells 32317926a79SDavid Howells /* 32419ffa01cSDavid Howells * Keys for matching a connection. 32519ffa01cSDavid Howells */ 32619ffa01cSDavid Howells struct rxrpc_conn_proto { 327e8d70ce1SDavid Howells union { 328e8d70ce1SDavid Howells struct { 32919ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 33019ffa01cSDavid Howells u32 cid; /* connection ID */ 331e8d70ce1SDavid Howells }; 332e8d70ce1SDavid Howells u64 index_key; 33319ffa01cSDavid Howells }; 33419ffa01cSDavid Howells }; 33519ffa01cSDavid Howells 33619ffa01cSDavid Howells struct rxrpc_conn_parameters { 33719ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 33819ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 33919ffa01cSDavid Howells struct key *key; /* Security details */ 34019ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3414e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 34219ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 34319ffa01cSDavid Howells u32 security_level; /* Security level selected */ 34419ffa01cSDavid Howells }; 34519ffa01cSDavid Howells 34619ffa01cSDavid Howells /* 347bba304dbSDavid Howells * Bits in the connection flags. 348bba304dbSDavid Howells */ 349bba304dbSDavid Howells enum rxrpc_conn_flag { 350bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 351001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 352001c1122SDavid Howells RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 35345025bceSDavid Howells RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 35445025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 35545025bceSDavid Howells RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 3564e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3573136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3583136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3593136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3603136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 361bba304dbSDavid Howells }; 362bba304dbSDavid Howells 3633136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3643136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3653136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3663136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3673136ef49SDavid Howells 368bba304dbSDavid Howells /* 369bba304dbSDavid Howells * Events that can be raised upon a connection. 370bba304dbSDavid Howells */ 371bba304dbSDavid Howells enum rxrpc_conn_event { 372bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 373bba304dbSDavid Howells }; 374bba304dbSDavid Howells 375bba304dbSDavid Howells /* 37645025bceSDavid Howells * The connection cache state. 37745025bceSDavid Howells */ 37845025bceSDavid Howells enum rxrpc_conn_cache_state { 37945025bceSDavid Howells RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 38045025bceSDavid Howells RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 38145025bceSDavid Howells RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 3824e255721SDavid Howells RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 38345025bceSDavid Howells RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 38445025bceSDavid Howells RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 385363deeabSDavid Howells RXRPC_CONN__NR_CACHE_STATES 38645025bceSDavid Howells }; 38745025bceSDavid Howells 38845025bceSDavid Howells /* 389bba304dbSDavid Howells * The connection protocol state. 390bba304dbSDavid Howells */ 391bba304dbSDavid Howells enum rxrpc_conn_proto_state { 392bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 393bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 39400e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 395bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 396bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 397bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 398bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 399bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 400bba304dbSDavid Howells RXRPC_CONN__NR_STATES 401bba304dbSDavid Howells }; 402bba304dbSDavid Howells 403bba304dbSDavid Howells /* 40417926a79SDavid Howells * RxRPC connection definition 405aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 40617926a79SDavid Howells * - each connection can only handle four simultaneous calls 40717926a79SDavid Howells */ 40817926a79SDavid Howells struct rxrpc_connection { 40919ffa01cSDavid Howells struct rxrpc_conn_proto proto; 41019ffa01cSDavid Howells struct rxrpc_conn_parameters params; 41119ffa01cSDavid Howells 41245025bceSDavid Howells atomic_t usage; 41345025bceSDavid Howells struct rcu_head rcu; 41445025bceSDavid Howells struct list_head cache_link; 415a1399f8bSDavid Howells 41645025bceSDavid Howells spinlock_t channel_lock; 41745025bceSDavid Howells unsigned char active_chans; /* Mask of active channels */ 41845025bceSDavid Howells #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 41945025bceSDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 420a1399f8bSDavid Howells struct rxrpc_channel { 4213136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 422a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4234764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 424a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 425a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 426a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 42718bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 42818bfeba5SDavid Howells union { 42918bfeba5SDavid Howells u32 last_seq; 43018bfeba5SDavid Howells u32 last_abort; 43118bfeba5SDavid Howells }; 432a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 433999b69f8SDavid Howells 4343136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 43517926a79SDavid Howells struct work_struct processor; /* connection event processor */ 436999b69f8SDavid Howells union { 437999b69f8SDavid Howells struct rb_node client_node; /* Node in local->client_conns */ 438aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 439999b69f8SDavid Howells }; 4404d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 44117926a79SDavid Howells struct list_head link; /* link in master connection list */ 44217926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 443648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 44417926a79SDavid Howells struct key *server_key; /* security for this service */ 44569d826faSKees Cook struct crypto_sync_skcipher *cipher; /* encryption handle */ 44617926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 4474a3388c8SDavid Howells unsigned long flags; 44817926a79SDavid Howells unsigned long events; 449f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 45017926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 451cf13258fSDavid Howells enum rxrpc_conn_cache_state cache_state; 452cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 45364753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 45417926a79SDavid Howells int debug_id; /* debug ID for printks */ 45517926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 456563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 45717926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 458c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 4595a924b89SDavid Howells u8 size_align; /* data size alignment (for security) */ 4605a924b89SDavid Howells u8 security_size; /* security header size */ 46117926a79SDavid Howells u8 security_ix; /* security type */ 46217926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 46364753092SDavid Howells short error; /* Local error code */ 46417926a79SDavid Howells }; 46517926a79SDavid Howells 466dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 467dc71db34SDavid Howells { 468dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 469dc71db34SDavid Howells } 470dc71db34SDavid Howells 471dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 472dc71db34SDavid Howells { 473dc71db34SDavid Howells return !rxrpc_to_server(sp); 474dc71db34SDavid Howells } 475dc71db34SDavid Howells 47617926a79SDavid Howells /* 4775b8848d1SDavid Howells * Flags in call->flags. 4785b8848d1SDavid Howells */ 4795b8848d1SDavid Howells enum rxrpc_call_flag { 4805b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4815b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 482dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 48345025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 484248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 485248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 486a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 4878e83134dSDavid Howells RXRPC_CALL_PINGING, /* Ping in process */ 48857494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 489c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 4901a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 491d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 492b960a34bSDavid Howells RXRPC_CALL_IS_INTR, /* The call is interruptible */ 4935b8848d1SDavid Howells }; 4945b8848d1SDavid Howells 4955b8848d1SDavid Howells /* 4965b8848d1SDavid Howells * Events that can be raised on a call. 4975b8848d1SDavid Howells */ 4985b8848d1SDavid Howells enum rxrpc_call_event { 4994c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 5004c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 5014c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 502a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 503a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 504bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 5055b8848d1SDavid Howells }; 5065b8848d1SDavid Howells 5075b8848d1SDavid Howells /* 5085b8848d1SDavid Howells * The states that a call can be in. 5095b8848d1SDavid Howells */ 5105b8848d1SDavid Howells enum rxrpc_call_state { 511999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 512999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5135b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5145b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5155b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 51600e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5175b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5185b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 5195b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5205b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5215b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5225b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 523f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 524f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 525f5c17aaeSDavid Howells }; 526f5c17aaeSDavid Howells 527f5c17aaeSDavid Howells /* 528e122d845SDavid Howells * Call completion condition (state == RXRPC_CALL_COMPLETE). 529e122d845SDavid Howells */ 530e122d845SDavid Howells enum rxrpc_call_completion { 531e122d845SDavid Howells RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 532e122d845SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 533e122d845SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 534e122d845SDavid Howells RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 535e122d845SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 536e122d845SDavid Howells NR__RXRPC_CALL_COMPLETIONS 537e122d845SDavid Howells }; 538e122d845SDavid Howells 539e122d845SDavid Howells /* 54057494343SDavid Howells * Call Tx congestion management modes. 54157494343SDavid Howells */ 54257494343SDavid Howells enum rxrpc_congest_mode { 54357494343SDavid Howells RXRPC_CALL_SLOW_START, 54457494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 54557494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 54657494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 54757494343SDavid Howells NR__RXRPC_CONGEST_MODES 54857494343SDavid Howells }; 54957494343SDavid Howells 55057494343SDavid Howells /* 55117926a79SDavid Howells * RxRPC call definition 55217926a79SDavid Howells * - matched by { connection, call_id } 55317926a79SDavid Howells */ 55417926a79SDavid Howells struct rxrpc_call { 555dee46364SDavid Howells struct rcu_head rcu; 55617926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 557df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5588d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 559d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 56091fcfbe8SDavid Howells const struct rxrpc_security *security; /* applied security module */ 561540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 562a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 563bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 564a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 565a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 566415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 567a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 568a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 569a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 570a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 571a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 5721db88c53SDavid Howells struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 573248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 574248f219cSDavid Howells struct work_struct processor; /* Event processor */ 575d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 57617926a79SDavid Howells struct list_head link; /* link in master call list */ 57745025bceSDavid Howells struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 578f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 579248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 580248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 581248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 582248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 58317926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 58445025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 585e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 586a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 58717926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 58817926a79SDavid Howells unsigned long flags; 58917926a79SDavid Howells unsigned long events; 59017926a79SDavid Howells spinlock_t lock; 59120acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 59217926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 593f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 594f5c17aaeSDavid Howells int error; /* Local error incurred */ 595cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 596cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 59717926a79SDavid Howells atomic_t usage; 598dabe5a79SDavid Howells u16 service_id; /* service ID */ 599278ac0cdSDavid Howells u8 security_ix; /* Security type */ 600dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 601dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 602dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 6038e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 6048e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 605f9c32435SDavid Howells bool rx_pkt_last; /* Current recvmsg packet is last */ 60617926a79SDavid Howells 607248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 608248f219cSDavid Howells * 609248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 610248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 611248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 612248f219cSDavid Howells * 613248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 614248f219cSDavid Howells * acked. 61517926a79SDavid Howells */ 616248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 617248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 6184075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 619248f219cSDavid Howells struct sk_buff **rxtx_buffer; 620248f219cSDavid Howells u8 *rxtx_annotations; 621248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 622248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 623248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 624248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 625f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 62670790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 62770790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 62870790dbeSDavid Howells 629e2de6c40SDavid Howells #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 630248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 631248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 632248f219cSDavid Howells * not hard-ACK'd packet follows this. 633248f219cSDavid Howells */ 634248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 635c7e86acfSDavid Howells u16 tx_backoff; /* Delay to insert due to Tx failure */ 63657494343SDavid Howells 63757494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 63857494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 63957494343SDavid Howells * packets) rather than bytes. 64057494343SDavid Howells */ 64157494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 64257494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 64357494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 64457494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 64557494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 64657494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 64757494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 64857494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 64957494343SDavid Howells 650248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 651248f219cSDavid Howells * consumed packet follows this. 652248f219cSDavid Howells */ 653248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 654248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6551a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 656248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 657248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 65871f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 65975e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 66017926a79SDavid Howells 661c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 662c1e15b49SDavid Howells 66317926a79SDavid Howells /* receive-phase ACK management */ 6644e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 6650d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 6661a2391c3SJeffrey Altman rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 667248f219cSDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 668805b21b9SDavid Howells rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 669805b21b9SDavid Howells rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 670a5af7e1fSDavid Howells 671a5af7e1fSDavid Howells /* ping management */ 672a5af7e1fSDavid Howells rxrpc_serial_t ping_serial; /* Last ping sent */ 673a5af7e1fSDavid Howells ktime_t ping_time; /* Time last ping sent */ 67417926a79SDavid Howells 675248f219cSDavid Howells /* transmission-phase ACK management */ 67657494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 677248f219cSDavid Howells rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ 67831a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 679bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 680bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 68131a1b989SDavid Howells }; 68231a1b989SDavid Howells 68331a1b989SDavid Howells /* 68457494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 68531a1b989SDavid Howells */ 68631a1b989SDavid Howells struct rxrpc_ack_summary { 68731a1b989SDavid Howells u8 ack_reason; 68831a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 68931a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 69031a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 69131a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 69231a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 69331a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 69457494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 69557494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 69657494343SDavid Howells /* Place to stash values for tracing */ 69757494343SDavid Howells enum rxrpc_congest_mode mode:8; 69857494343SDavid Howells u8 cwnd; 69957494343SDavid Howells u8 ssthresh; 70057494343SDavid Howells u8 dup_acks; 70157494343SDavid Howells u8 cumulative_acks; 70217926a79SDavid Howells }; 70317926a79SDavid Howells 70448124178SDavid Howells /* 70548124178SDavid Howells * sendmsg() cmsg-specified parameters. 70648124178SDavid Howells */ 70748124178SDavid Howells enum rxrpc_command { 70848124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 70948124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 71048124178SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 71148124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 71248124178SDavid Howells }; 71348124178SDavid Howells 71448124178SDavid Howells struct rxrpc_call_params { 71548124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 71648124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 71748124178SDavid Howells struct { 71848124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 71948124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 72048124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 72148124178SDavid Howells } timeouts; 72248124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 723b960a34bSDavid Howells bool intr; /* The call is interruptible */ 72448124178SDavid Howells }; 72548124178SDavid Howells 72648124178SDavid Howells struct rxrpc_send_params { 72748124178SDavid Howells struct rxrpc_call_params call; 72848124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 72948124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 73048124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 73148124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 73248124178SDavid Howells }; 73348124178SDavid Howells 734df844fd4SDavid Howells #include <trace/events/rxrpc.h> 735df844fd4SDavid Howells 73617926a79SDavid Howells /* 737651350d1SDavid Howells * af_rxrpc.c 73817926a79SDavid Howells */ 73971f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 740651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 74117926a79SDavid Howells 74217926a79SDavid Howells /* 7430d81a51aSDavid Howells * call_accept.c 74417926a79SDavid Howells */ 74500e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 74600e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 747248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7480099dc58SDavid Howells struct rxrpc_sock *, 749248f219cSDavid Howells struct sk_buff *); 7504f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 751d001648eSDavid Howells struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 752d001648eSDavid Howells rxrpc_notify_rx_t); 753c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 75417926a79SDavid Howells 75517926a79SDavid Howells /* 7560d81a51aSDavid Howells * call_event.c 75717926a79SDavid Howells */ 758e8c3af6bSDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 7599c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 760c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 76117926a79SDavid Howells 762a158bdd3SDavid Howells static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 763a158bdd3SDavid Howells unsigned long expire_at, 764a158bdd3SDavid Howells unsigned long now, 765a158bdd3SDavid Howells enum rxrpc_timer_trace why) 766a158bdd3SDavid Howells { 767a158bdd3SDavid Howells trace_rxrpc_timer(call, why, now); 768a158bdd3SDavid Howells timer_reduce(&call->timer, expire_at); 769a158bdd3SDavid Howells } 770a158bdd3SDavid Howells 77117926a79SDavid Howells /* 7720d81a51aSDavid Howells * call_object.c 77317926a79SDavid Howells */ 774f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 775f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 776dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 77717926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 77817926a79SDavid Howells 7792341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 780a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7812341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 78219ffa01cSDavid Howells struct rxrpc_conn_parameters *, 783999b69f8SDavid Howells struct sockaddr_rxrpc *, 784a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 785a25e21f0SDavid Howells unsigned int); 786248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 78742886ffeSDavid Howells struct sk_buff *); 7888d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 789c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 7908d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 7918d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 792e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 793fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 794fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 79500e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 7962baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 79717926a79SDavid Howells 798dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 799dabe5a79SDavid Howells { 800dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 801dabe5a79SDavid Howells } 802dabe5a79SDavid Howells 803dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 804dabe5a79SDavid Howells { 805dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 806dabe5a79SDavid Howells } 807dabe5a79SDavid Howells 80817926a79SDavid Howells /* 809f5c17aaeSDavid Howells * Transition a call to the complete state. 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 { 816f5c17aaeSDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 817f5c17aaeSDavid Howells call->abort_code = abort_code; 818f5c17aaeSDavid Howells call->error = error; 819f5c17aaeSDavid Howells call->completion = compl, 820f5c17aaeSDavid Howells call->state = RXRPC_CALL_COMPLETE; 8211bae5d22SDavid Howells trace_rxrpc_call_complete(call); 822c0d058c2SDavid Howells wake_up(&call->waitq); 823f5c17aaeSDavid Howells return true; 824f5c17aaeSDavid Howells } 825f5c17aaeSDavid Howells return false; 826f5c17aaeSDavid Howells } 827f5c17aaeSDavid Howells 828f5c17aaeSDavid Howells static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 829f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 830f5c17aaeSDavid Howells u32 abort_code, 831f5c17aaeSDavid Howells int error) 832f5c17aaeSDavid Howells { 833e8d6bbb0SDavid Howells bool ret; 834f5c17aaeSDavid Howells 835f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 836f5c17aaeSDavid Howells ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 837f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 838f5c17aaeSDavid Howells return ret; 839f5c17aaeSDavid Howells } 840f5c17aaeSDavid Howells 841f5c17aaeSDavid Howells /* 842f5c17aaeSDavid Howells * Record that a call successfully completed. 843f5c17aaeSDavid Howells */ 844e8d6bbb0SDavid Howells static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 845f5c17aaeSDavid Howells { 846e8d6bbb0SDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 847f5c17aaeSDavid Howells } 848f5c17aaeSDavid Howells 849e8d6bbb0SDavid Howells static inline bool rxrpc_call_completed(struct rxrpc_call *call) 850f5c17aaeSDavid Howells { 851e8d6bbb0SDavid Howells bool ret; 852e8d6bbb0SDavid Howells 853f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 854e8d6bbb0SDavid Howells ret = __rxrpc_call_completed(call); 855f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 856e8d6bbb0SDavid Howells return ret; 857f5c17aaeSDavid Howells } 858f5c17aaeSDavid Howells 859f5c17aaeSDavid Howells /* 860f5c17aaeSDavid Howells * Record that a call is locally aborted. 861f5c17aaeSDavid Howells */ 8625a42976dSDavid Howells static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8635a42976dSDavid Howells rxrpc_seq_t seq, 864f5c17aaeSDavid Howells u32 abort_code, int error) 865f5c17aaeSDavid Howells { 866a25e21f0SDavid Howells trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 8675a42976dSDavid Howells abort_code, error); 868248f219cSDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 869248f219cSDavid Howells abort_code, error); 870f5c17aaeSDavid Howells } 871f5c17aaeSDavid Howells 8725a42976dSDavid Howells static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8735a42976dSDavid Howells rxrpc_seq_t seq, u32 abort_code, int error) 874f5c17aaeSDavid Howells { 875f5c17aaeSDavid Howells bool ret; 876f5c17aaeSDavid Howells 877f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 8785a42976dSDavid Howells ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 879f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 880f5c17aaeSDavid Howells return ret; 881f5c17aaeSDavid Howells } 882f5c17aaeSDavid Howells 883f5c17aaeSDavid Howells /* 884fb46f6eeSDavid Howells * Abort a call due to a protocol error. 885fb46f6eeSDavid Howells */ 886fb46f6eeSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 887fb46f6eeSDavid Howells struct sk_buff *skb, 888fb46f6eeSDavid Howells const char *eproto_why, 889fb46f6eeSDavid Howells const char *why, 890fb46f6eeSDavid Howells u32 abort_code) 891fb46f6eeSDavid Howells { 892fb46f6eeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 893fb46f6eeSDavid Howells 894fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 895fb46f6eeSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 896fb46f6eeSDavid Howells } 897fb46f6eeSDavid Howells 898fb46f6eeSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 899fb46f6eeSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 900fb46f6eeSDavid Howells (abort_why), (abort_code)) 901fb46f6eeSDavid Howells 902fb46f6eeSDavid Howells /* 9034a3388c8SDavid Howells * conn_client.c 9044a3388c8SDavid Howells */ 90545025bceSDavid Howells extern unsigned int rxrpc_max_client_connections; 90645025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 907a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 908a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 9094a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 9104a3388c8SDavid Howells 911eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 9125e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 9135e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 9145e33a23bSDavid Howells gfp_t); 91545025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 91645025bceSDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_call *); 91745025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 9182baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 9192baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 920d12040b6SDavid Howells void rxrpc_clean_up_local_conns(struct rxrpc_local *); 9214a3388c8SDavid Howells 9224a3388c8SDavid Howells /* 9230d81a51aSDavid Howells * conn_event.c 9240d81a51aSDavid Howells */ 9250d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 9260d81a51aSDavid Howells 9270d81a51aSDavid Howells /* 9280d81a51aSDavid Howells * conn_object.c 92917926a79SDavid Howells */ 930dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 931f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 93217926a79SDavid Howells 933c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 9348496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 9350099dc58SDavid Howells struct sk_buff *, 9360099dc58SDavid Howells struct rxrpc_peer **); 93745025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 938999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 93945025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 940363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 941363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 942363deeabSDavid Howells void rxrpc_get_connection(struct rxrpc_connection *); 943363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 944363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 9452baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 9462baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 94717926a79SDavid Howells 94819ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 94919ffa01cSDavid Howells { 95019ffa01cSDavid Howells return conn->out_clientflag; 95119ffa01cSDavid Howells } 95219ffa01cSDavid Howells 95319ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 95419ffa01cSDavid Howells { 955e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 95619ffa01cSDavid Howells } 95719ffa01cSDavid Howells 958f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 959f51b4480SDavid Howells { 96045025bceSDavid Howells if (!conn) 96145025bceSDavid Howells return; 96245025bceSDavid Howells 963363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 96445025bceSDavid Howells rxrpc_put_client_conn(conn); 965363deeabSDavid Howells else 966363deeabSDavid Howells rxrpc_put_service_conn(conn); 9675acbee46SDavid Howells } 9685acbee46SDavid Howells 9693136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9703136ef49SDavid Howells unsigned long expire_at) 9713136ef49SDavid Howells { 9723136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9733136ef49SDavid Howells } 9743136ef49SDavid Howells 97517926a79SDavid Howells /* 9767877a4a4SDavid Howells * conn_service.c 9777877a4a4SDavid Howells */ 9788496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9798496af50SDavid Howells struct sk_buff *); 9802baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 981063c60d3SDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 982063c60d3SDavid Howells const struct rxrpc_security *, struct key *, 983063c60d3SDavid Howells struct sk_buff *); 984001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9857877a4a4SDavid Howells 9867877a4a4SDavid Howells /* 9870d81a51aSDavid Howells * input.c 98817926a79SDavid Howells */ 9895271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 99017926a79SDavid Howells 99117926a79SDavid Howells /* 9920d81a51aSDavid Howells * insecure.c 99317926a79SDavid Howells */ 9940d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 99517926a79SDavid Howells 99617926a79SDavid Howells /* 9970d81a51aSDavid Howells * key.c 99817926a79SDavid Howells */ 99917926a79SDavid Howells extern struct key_type key_type_rxrpc; 100017926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 100117926a79SDavid Howells 1002c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 1003c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 100410674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 1005c1b1203dSJoe Perches u32); 100617926a79SDavid Howells 100717926a79SDavid Howells /* 100887563616SDavid Howells * local_event.c 100987563616SDavid Howells */ 10104f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 101187563616SDavid Howells 101287563616SDavid Howells /* 10130d81a51aSDavid Howells * local_object.c 101417926a79SDavid Howells */ 10152baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 101609d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 101709d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 101809d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 1019730c5fd4SDavid Howells struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 1020730c5fd4SDavid Howells void rxrpc_unuse_local(struct rxrpc_local *); 102109d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 10222baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 1023e0e4d82fSDavid Howells 102404d36d74SDavid Howells static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 102504d36d74SDavid Howells { 102604d36d74SDavid Howells return atomic_dec_return(&local->active_users) == 0; 102704d36d74SDavid Howells } 102804d36d74SDavid Howells 102904d36d74SDavid Howells static inline bool __rxrpc_use_local(struct rxrpc_local *local) 103004d36d74SDavid Howells { 103104d36d74SDavid Howells return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 103204d36d74SDavid Howells } 103304d36d74SDavid Howells 1034e0e4d82fSDavid Howells /* 10358e688d9cSDavid Howells * misc.c 10368e688d9cSDavid Howells */ 10370e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 1038a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 1039a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 1040a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 10418e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 10428e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 10438e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 1044a158bdd3SDavid Howells extern unsigned long rxrpc_resend_timeout; 10458e688d9cSDavid Howells 10468e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 10478e688d9cSDavid Howells 10488e688d9cSDavid Howells /* 10492baec2c3SDavid Howells * net_ns.c 10502baec2c3SDavid Howells */ 10512baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 10522baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 10532baec2c3SDavid Howells 10542baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 10552baec2c3SDavid Howells { 10562baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 10572baec2c3SDavid Howells } 10582baec2c3SDavid Howells 10592baec2c3SDavid Howells /* 10600d81a51aSDavid Howells * output.c 10610d81a51aSDavid Howells */ 1062bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 106326cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 1064a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1065248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 1066ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 10670d81a51aSDavid Howells 10680d81a51aSDavid Howells /* 1069abe89ef0SDavid Howells * peer_event.c 10700d81a51aSDavid Howells */ 1071abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1072cf1a6474SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1073cf1a6474SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1074ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10750d81a51aSDavid Howells 10760d81a51aSDavid Howells /* 10770d81a51aSDavid Howells * peer_object.c 10780d81a51aSDavid Howells */ 1079be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1080be6e6707SDavid Howells const struct sockaddr_rxrpc *); 10815e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1082be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1083be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10845e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 10855e33a23bSDavid Howells struct rxrpc_peer *); 108617226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10871159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10881159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10891159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 109060034d3dSDavid Howells void rxrpc_put_peer_locked(struct rxrpc_peer *); 10910d81a51aSDavid Howells 10920d81a51aSDavid Howells /* 10930d81a51aSDavid Howells * proc.c 10940d81a51aSDavid Howells */ 1095c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1096c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 1097bc0e7cf4SDavid Howells extern const struct seq_operations rxrpc_peer_seq_ops; 10980d81a51aSDavid Howells 10990d81a51aSDavid Howells /* 11000d81a51aSDavid Howells * recvmsg.c 11010d81a51aSDavid Howells */ 1102248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 11030d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 11040d81a51aSDavid Howells 11050d81a51aSDavid Howells /* 1106648af7fcSDavid Howells * rxkad.c 1107648af7fcSDavid Howells */ 1108648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1109648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1110648af7fcSDavid Howells #endif 1111648af7fcSDavid Howells 1112648af7fcSDavid Howells /* 11130d81a51aSDavid Howells * security.c 11140d81a51aSDavid Howells */ 11150d81a51aSDavid Howells int __init rxrpc_init_security(void); 11160d81a51aSDavid Howells void rxrpc_exit_security(void); 11170d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1118063c60d3SDavid Howells bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *, 1119063c60d3SDavid Howells const struct rxrpc_security **, struct key **, 1120063c60d3SDavid Howells struct sk_buff *); 11210d81a51aSDavid Howells 11220d81a51aSDavid Howells /* 11230b58b8a1SDavid Howells * sendmsg.c 11240b58b8a1SDavid Howells */ 11250b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 11260b58b8a1SDavid Howells 11270b58b8a1SDavid Howells /* 11280d81a51aSDavid Howells * skbuff.c 11290d81a51aSDavid Howells */ 1130d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 11310d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 113271f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 113371f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1134d0d5c0cdSDavid Howells void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 113571f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 113671f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1137df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 11380d81a51aSDavid Howells 11390d81a51aSDavid Howells /* 11405873c083SDavid Howells * sysctl.c 11415873c083SDavid Howells */ 11425873c083SDavid Howells #ifdef CONFIG_SYSCTL 11435873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11445873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11455873c083SDavid Howells #else 11465873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11475873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11485873c083SDavid Howells #endif 11495873c083SDavid Howells 11505873c083SDavid Howells /* 1151be6e6707SDavid Howells * utils.c 1152be6e6707SDavid Howells */ 11535a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1154be6e6707SDavid Howells 1155248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1156248f219cSDavid Howells { 1157248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1158248f219cSDavid Howells } 1159248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1160248f219cSDavid Howells { 1161248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1162248f219cSDavid Howells } 1163248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1164248f219cSDavid Howells { 1165248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1166248f219cSDavid Howells } 1167248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1168248f219cSDavid Howells { 1169248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1170248f219cSDavid Howells } 1171248f219cSDavid Howells 1172be6e6707SDavid Howells /* 117317926a79SDavid Howells * debug tracing 117417926a79SDavid Howells */ 117595c96174SEric Dumazet extern unsigned int rxrpc_debug; 117617926a79SDavid Howells 117717926a79SDavid Howells #define dbgprintk(FMT,...) \ 11789f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 117917926a79SDavid Howells 11800dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11810dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 118217926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 118317926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 118417926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 118517926a79SDavid Howells 118617926a79SDavid Howells 118717926a79SDavid Howells #if defined(__KDEBUG) 118817926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 118917926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 119017926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 119117926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 119217926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 119317926a79SDavid Howells 119417926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 119517926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 119617926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 119717926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 119817926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 119917926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 120017926a79SDavid Howells 120117926a79SDavid Howells #define _enter(FMT,...) \ 120217926a79SDavid Howells do { \ 120317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 120417926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 120517926a79SDavid Howells } while (0) 120617926a79SDavid Howells 120717926a79SDavid Howells #define _leave(FMT,...) \ 120817926a79SDavid Howells do { \ 120917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 121017926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 121117926a79SDavid Howells } while (0) 121217926a79SDavid Howells 121317926a79SDavid Howells #define _debug(FMT,...) \ 121417926a79SDavid Howells do { \ 121517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 121617926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 121717926a79SDavid Howells } while (0) 121817926a79SDavid Howells 121917926a79SDavid Howells #define _proto(FMT,...) \ 122017926a79SDavid Howells do { \ 122117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 122217926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 122317926a79SDavid Howells } while (0) 122417926a79SDavid Howells 122517926a79SDavid Howells #define _net(FMT,...) \ 122617926a79SDavid Howells do { \ 122717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 122817926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 122917926a79SDavid Howells } while (0) 123017926a79SDavid Howells 123117926a79SDavid Howells #else 123212fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 123312fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 123412fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 123512fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 123612fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 123717926a79SDavid Howells #endif 123817926a79SDavid Howells 123917926a79SDavid Howells /* 124017926a79SDavid Howells * debug assertion checking 124117926a79SDavid Howells */ 124217926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 124317926a79SDavid Howells 124417926a79SDavid Howells #define ASSERT(X) \ 124517926a79SDavid Howells do { \ 124617926a79SDavid Howells if (unlikely(!(X))) { \ 12479b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 124817926a79SDavid Howells BUG(); \ 124917926a79SDavid Howells } \ 125017926a79SDavid Howells } while (0) 125117926a79SDavid Howells 125217926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 125317926a79SDavid Howells do { \ 1254cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1255cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12569b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12579b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1258cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1259cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 126017926a79SDavid Howells BUG(); \ 126117926a79SDavid Howells } \ 126217926a79SDavid Howells } while (0) 126317926a79SDavid Howells 126417926a79SDavid Howells #define ASSERTIF(C, X) \ 126517926a79SDavid Howells do { \ 126617926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12679b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 126817926a79SDavid Howells BUG(); \ 126917926a79SDavid Howells } \ 127017926a79SDavid Howells } while (0) 127117926a79SDavid Howells 127217926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 127317926a79SDavid Howells do { \ 1274cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1275cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12769b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12779b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1278cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1279cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 128017926a79SDavid Howells BUG(); \ 128117926a79SDavid Howells } \ 128217926a79SDavid Howells } while (0) 128317926a79SDavid Howells 128417926a79SDavid Howells #else 128517926a79SDavid Howells 128617926a79SDavid Howells #define ASSERT(X) \ 128717926a79SDavid Howells do { \ 128817926a79SDavid Howells } while (0) 128917926a79SDavid Howells 129017926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 129117926a79SDavid Howells do { \ 129217926a79SDavid Howells } while (0) 129317926a79SDavid Howells 129417926a79SDavid Howells #define ASSERTIF(C, X) \ 129517926a79SDavid Howells do { \ 129617926a79SDavid Howells } while (0) 129717926a79SDavid Howells 129817926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 129917926a79SDavid Howells do { \ 130017926a79SDavid Howells } while (0) 130117926a79SDavid Howells 130217926a79SDavid Howells #endif /* __KDEBUGALL */ 1303