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> 10c410bf01SDavid Howells #include <linux/win_minmax.h> 112baec2c3SDavid Howells #include <net/net_namespace.h> 122baec2c3SDavid Howells #include <net/netns/generic.h> 13e0e4d82fSDavid Howells #include <net/sock.h> 14be6e6707SDavid Howells #include <net/af_rxrpc.h> 1541057ebdSDavid Howells #include <keys/rxrpc-type.h> 16ddc6c70fSDavid Howells #include "protocol.h" 1717926a79SDavid Howells 1817926a79SDavid Howells #define FCRYPT_BSIZE 8 1917926a79SDavid Howells struct rxrpc_crypt { 2017926a79SDavid Howells union { 2117926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 2291e916cfSAl Viro __be32 n[2]; 2317926a79SDavid Howells }; 2417926a79SDavid Howells } __attribute__((aligned(8))); 2517926a79SDavid Howells 26651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 27651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 28651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 29651350d1SDavid Howells 3012da59fcSDavid Howells struct key_preparsed_payload; 31cc8feb8eSDavid Howells struct rxrpc_connection; 32cc8feb8eSDavid Howells 3317926a79SDavid Howells /* 34ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 35ece64fecSDavid Howells * to pass supplementary information. 36d001648eSDavid Howells */ 37d001648eSDavid Howells enum rxrpc_skb_mark { 38ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 39ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 40d001648eSDavid Howells }; 41d001648eSDavid Howells 42d001648eSDavid Howells /* 4317926a79SDavid Howells * sk_state for RxRPC sockets 4417926a79SDavid Howells */ 4517926a79SDavid Howells enum { 462341e077SDavid Howells RXRPC_UNBOUND = 0, 472341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 4817926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 4917926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5028036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 5117926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 52210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 5317926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 5417926a79SDavid Howells }; 5517926a79SDavid Howells 5617926a79SDavid Howells /* 572baec2c3SDavid Howells * Per-network namespace data. 582baec2c3SDavid Howells */ 592baec2c3SDavid Howells struct rxrpc_net { 602baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 612baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 622baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 63ad25f5cbSDavid Howells spinlock_t call_lock; /* Lock for ->calls */ 64d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 652baec2c3SDavid Howells 6631f5f9a1SDavid Howells atomic_t nr_conns; 672baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 682baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 692baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 703d18cbb7SDavid Howells struct work_struct service_conn_reaper; 713d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 722baec2c3SDavid Howells 73f859ab61SDavid Howells bool live; 74245500d8SDavid Howells 75245500d8SDavid Howells bool kill_all_client_conns; 76245500d8SDavid Howells atomic_t nr_client_conns; 772baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 782baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 792baec2c3SDavid Howells struct list_head idle_client_conns; 803d18cbb7SDavid Howells struct work_struct client_conn_reaper; 813d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 822baec2c3SDavid Howells 8333912c26SDavid Howells struct hlist_head local_endpoints; 842baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 852baec2c3SDavid Howells 862baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 87ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 88ace45becSDavid Howells 89ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 90ace45becSDavid Howells u8 peer_keepalive_cursor; 91330bdcfaSDavid Howells time64_t peer_keepalive_base; 92330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 93330bdcfaSDavid Howells struct list_head peer_keepalive_new; 94ace45becSDavid Howells struct timer_list peer_keepalive_timer; 95ace45becSDavid Howells struct work_struct peer_keepalive_work; 962baec2c3SDavid Howells }; 972baec2c3SDavid Howells 982baec2c3SDavid Howells /* 9900e90712SDavid Howells * Service backlog preallocation. 10000e90712SDavid Howells * 10100e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 10200e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 10300e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 10400e90712SDavid Howells * shuffle packets around so much. 10500e90712SDavid Howells */ 10600e90712SDavid Howells struct rxrpc_backlog { 10700e90712SDavid Howells unsigned short peer_backlog_head; 10800e90712SDavid Howells unsigned short peer_backlog_tail; 10900e90712SDavid Howells unsigned short conn_backlog_head; 11000e90712SDavid Howells unsigned short conn_backlog_tail; 11100e90712SDavid Howells unsigned short call_backlog_head; 11200e90712SDavid Howells unsigned short call_backlog_tail; 11300e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 11400e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 11500e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 11600e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 11700e90712SDavid Howells }; 11800e90712SDavid Howells 11900e90712SDavid Howells /* 12017926a79SDavid Howells * RxRPC socket definition 12117926a79SDavid Howells */ 12217926a79SDavid Howells struct rxrpc_sock { 12317926a79SDavid Howells /* WARNING: sk has to be the first member */ 12417926a79SDavid Howells struct sock sk; 125d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 12600e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 12717926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 12800e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 129248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 130248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 131248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 132248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 133248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 13417926a79SDavid Howells struct key *key; /* security for this socket */ 13517926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 13600e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 13717926a79SDavid Howells unsigned long flags; 1382341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 13917926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 14017926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 14117926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 142cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 14328036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1444722974dSDavid Howells struct { 1454722974dSDavid Howells /* Service upgrade information */ 1464722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1474722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1484722974dSDavid Howells } service_upgrade; 149cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1504722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1512341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 15217926a79SDavid Howells }; 15317926a79SDavid Howells 15417926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 15517926a79SDavid Howells 15617926a79SDavid Howells /* 1570d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1580d12f8a4SDavid Howells */ 1590d12f8a4SDavid Howells struct rxrpc_host_header { 1600d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1610d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1620d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1630d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1640d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1650d12f8a4SDavid Howells u8 type; /* packet type */ 1660d12f8a4SDavid Howells u8 flags; /* packet flags */ 1670d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1680d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1690d12f8a4SDavid Howells union { 1700d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1710d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1720d12f8a4SDavid Howells }; 1730d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1740d12f8a4SDavid Howells } __packed; 1750d12f8a4SDavid Howells 1760d12f8a4SDavid Howells /* 17717926a79SDavid Howells * RxRPC socket buffer private variables 17817926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 17917926a79SDavid Howells */ 18017926a79SDavid Howells struct rxrpc_skb_priv { 181987db9f7SDavid Howells atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 182c3c9e3dfSDavid Howells u8 nr_subpackets; /* Number of subpackets */ 183c3c9e3dfSDavid Howells u8 rx_flags; /* Received packet flags */ 184c3c9e3dfSDavid Howells #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 185b311e684SDavid Howells #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 18617926a79SDavid Howells union { 18717926a79SDavid Howells int remain; /* amount of space remaining for next write */ 188c3c9e3dfSDavid Howells 189c3c9e3dfSDavid Howells /* List of requested ACKs on subpackets */ 190c3c9e3dfSDavid Howells unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 191c3c9e3dfSDavid Howells BITS_PER_LONG]; 19217926a79SDavid Howells }; 19317926a79SDavid Howells 1940d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 19517926a79SDavid Howells }; 19617926a79SDavid Howells 19717926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 19817926a79SDavid Howells 19917926a79SDavid Howells /* 20017926a79SDavid Howells * RxRPC security module interface 20117926a79SDavid Howells */ 20217926a79SDavid Howells struct rxrpc_security { 20317926a79SDavid Howells const char *name; /* name of this service */ 20417926a79SDavid Howells u8 security_index; /* security type provided */ 205063c60d3SDavid Howells u32 no_key_abort; /* Abort code indicating no key */ 20617926a79SDavid Howells 207648af7fcSDavid Howells /* Initialise a security service */ 208648af7fcSDavid Howells int (*init)(void); 209648af7fcSDavid Howells 210648af7fcSDavid Howells /* Clean up a security service */ 211648af7fcSDavid Howells void (*exit)(void); 212648af7fcSDavid Howells 21312da59fcSDavid Howells /* Parse the information from a server key */ 21412da59fcSDavid Howells int (*preparse_server_key)(struct key_preparsed_payload *); 21512da59fcSDavid Howells 21612da59fcSDavid Howells /* Clean up the preparse buffer after parsing a server key */ 21712da59fcSDavid Howells void (*free_preparse_server_key)(struct key_preparsed_payload *); 21812da59fcSDavid Howells 21912da59fcSDavid Howells /* Destroy the payload of a server key */ 22012da59fcSDavid Howells void (*destroy_server_key)(struct key *); 22112da59fcSDavid Howells 222d5953f65SDavid Howells /* Describe a server key */ 223d5953f65SDavid Howells void (*describe_server_key)(const struct key *, struct seq_file *); 224d5953f65SDavid Howells 22517926a79SDavid Howells /* initialise a connection's security */ 22641057ebdSDavid Howells int (*init_connection_security)(struct rxrpc_connection *, 22741057ebdSDavid Howells struct rxrpc_key_token *); 22817926a79SDavid Howells 229d7d775b1SDavid Howells /* Work out how much data we can store in a packet, given an estimate 230d7d775b1SDavid Howells * of the amount of data remaining. 231d7d775b1SDavid Howells */ 232d7d775b1SDavid Howells int (*how_much_data)(struct rxrpc_call *, size_t, 233d7d775b1SDavid Howells size_t *, size_t *, size_t *); 23417926a79SDavid Howells 23517926a79SDavid Howells /* impose security on a packet */ 236f4bdf3d6SDavid Howells int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 23717926a79SDavid Howells 23817926a79SDavid Howells /* verify the security on a received packet */ 2395a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 240248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 241248f219cSDavid Howells 2421db88c53SDavid Howells /* Free crypto request on a call */ 2431db88c53SDavid Howells void (*free_call_crypto)(struct rxrpc_call *); 2441db88c53SDavid Howells 245248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 246248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 247248f219cSDavid Howells unsigned int *, unsigned int *); 24817926a79SDavid Howells 24917926a79SDavid Howells /* issue a challenge */ 25017926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 25117926a79SDavid Howells 25217926a79SDavid Howells /* respond to a challenge */ 25317926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 25417926a79SDavid Howells struct sk_buff *, 25517926a79SDavid Howells u32 *); 25617926a79SDavid Howells 25717926a79SDavid Howells /* verify a response */ 25817926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 25917926a79SDavid Howells struct sk_buff *, 26017926a79SDavid Howells u32 *); 26117926a79SDavid Howells 26217926a79SDavid Howells /* clear connection security */ 26317926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 26417926a79SDavid Howells }; 26517926a79SDavid Howells 26617926a79SDavid Howells /* 2674f95dd78SDavid Howells * RxRPC local transport endpoint description 2684f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2694f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 27017926a79SDavid Howells */ 27117926a79SDavid Howells struct rxrpc_local { 2724f95dd78SDavid Howells struct rcu_head rcu; 273730c5fd4SDavid Howells atomic_t active_users; /* Number of users of the local endpoint */ 274a0575429SDavid Howells refcount_t ref; /* Number of references to the structure */ 2752baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 27633912c26SDavid Howells struct hlist_node link; 27717926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2784f95dd78SDavid Howells struct work_struct processor; 2791e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 28017926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 28117926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 28244ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 283245500d8SDavid Howells struct rb_root client_bundles; /* Client connection bundles by socket params */ 284245500d8SDavid Howells spinlock_t client_bundles_lock; /* Lock for client_bundles */ 28517926a79SDavid Howells spinlock_t lock; /* access lock */ 28617926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 28717926a79SDavid Howells int debug_id; /* debug ID for printks */ 2884f95dd78SDavid Howells bool dead; 289f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 29017926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 29117926a79SDavid Howells }; 29217926a79SDavid Howells 29317926a79SDavid Howells /* 29417926a79SDavid Howells * RxRPC remote transport endpoint definition 295be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 29617926a79SDavid Howells */ 29717926a79SDavid Howells struct rxrpc_peer { 298be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 299a0575429SDavid Howells refcount_t ref; 300be6e6707SDavid Howells unsigned long hash_key; 301be6e6707SDavid Howells struct hlist_node hash_link; 302be6e6707SDavid Howells struct rxrpc_local *local; 303f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 304aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 305330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 306ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 3078496af50SDavid Howells seqlock_t service_conn_lock; 30817926a79SDavid Howells spinlock_t lock; /* access lock */ 30995c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 31095c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 31195c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 31217926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 31317926a79SDavid Howells int debug_id; /* debug ID for printks */ 31417926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 31517926a79SDavid Howells 31617926a79SDavid Howells /* calculated RTT cache */ 31717926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 318c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3190d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 320c410bf01SDavid Howells unsigned int rtt_count; /* Number of samples we've got */ 321c410bf01SDavid Howells 322c410bf01SDavid Howells u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 323c410bf01SDavid Howells u32 mdev_us; /* medium deviation */ 324c410bf01SDavid Howells u32 mdev_max_us; /* maximal mdev for the last rtt period */ 325c410bf01SDavid Howells u32 rttvar_us; /* smoothed mdev_max */ 326c410bf01SDavid Howells u32 rto_j; /* Retransmission timeout in jiffies */ 327c410bf01SDavid Howells u8 backoff; /* Backoff timeout */ 328f7aec129SDavid Howells 329f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 33017926a79SDavid Howells }; 33117926a79SDavid Howells 33217926a79SDavid Howells /* 33319ffa01cSDavid Howells * Keys for matching a connection. 33419ffa01cSDavid Howells */ 33519ffa01cSDavid Howells struct rxrpc_conn_proto { 336e8d70ce1SDavid Howells union { 337e8d70ce1SDavid Howells struct { 33819ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 33919ffa01cSDavid Howells u32 cid; /* connection ID */ 340e8d70ce1SDavid Howells }; 341e8d70ce1SDavid Howells u64 index_key; 34219ffa01cSDavid Howells }; 34319ffa01cSDavid Howells }; 34419ffa01cSDavid Howells 34519ffa01cSDavid Howells struct rxrpc_conn_parameters { 34619ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 34719ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 34819ffa01cSDavid Howells struct key *key; /* Security details */ 34919ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3504e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 35119ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 35219ffa01cSDavid Howells u32 security_level; /* Security level selected */ 35319ffa01cSDavid Howells }; 35419ffa01cSDavid Howells 35519ffa01cSDavid Howells /* 356bba304dbSDavid Howells * Bits in the connection flags. 357bba304dbSDavid Howells */ 358bba304dbSDavid Howells enum rxrpc_conn_flag { 359bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 360001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 36145025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 3624e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3633136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3643136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3653136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3663136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 367bba304dbSDavid Howells }; 368bba304dbSDavid Howells 3693136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3703136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3713136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3723136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3733136ef49SDavid Howells 374bba304dbSDavid Howells /* 375bba304dbSDavid Howells * Events that can be raised upon a connection. 376bba304dbSDavid Howells */ 377bba304dbSDavid Howells enum rxrpc_conn_event { 378bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 379bba304dbSDavid Howells }; 380bba304dbSDavid Howells 381bba304dbSDavid Howells /* 382bba304dbSDavid Howells * The connection protocol state. 383bba304dbSDavid Howells */ 384bba304dbSDavid Howells enum rxrpc_conn_proto_state { 385bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 386bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 38700e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 388bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 389bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 390bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 391bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 392bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 393bba304dbSDavid Howells RXRPC_CONN__NR_STATES 394bba304dbSDavid Howells }; 395bba304dbSDavid Howells 396bba304dbSDavid Howells /* 397245500d8SDavid Howells * RxRPC client connection bundle. 398245500d8SDavid Howells */ 399245500d8SDavid Howells struct rxrpc_bundle { 400245500d8SDavid Howells struct rxrpc_conn_parameters params; 401a0575429SDavid Howells refcount_t ref; 402245500d8SDavid Howells unsigned int debug_id; 403245500d8SDavid Howells bool try_upgrade; /* True if the bundle is attempting upgrade */ 404245500d8SDavid Howells bool alloc_conn; /* True if someone's getting a conn */ 4058806245aSDavid Howells short alloc_error; /* Error from last conn allocation */ 406245500d8SDavid Howells spinlock_t channel_lock; 407245500d8SDavid Howells struct rb_node local_node; /* Node in local->client_conns */ 408245500d8SDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 409245500d8SDavid Howells unsigned long avail_chans; /* Mask of available channels */ 410245500d8SDavid Howells struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 411245500d8SDavid Howells }; 412245500d8SDavid Howells 413245500d8SDavid Howells /* 41417926a79SDavid Howells * RxRPC connection definition 415aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 41617926a79SDavid Howells * - each connection can only handle four simultaneous calls 41717926a79SDavid Howells */ 41817926a79SDavid Howells struct rxrpc_connection { 41919ffa01cSDavid Howells struct rxrpc_conn_proto proto; 42019ffa01cSDavid Howells struct rxrpc_conn_parameters params; 42119ffa01cSDavid Howells 422a0575429SDavid Howells refcount_t ref; 42345025bceSDavid Howells struct rcu_head rcu; 42445025bceSDavid Howells struct list_head cache_link; 425a1399f8bSDavid Howells 426245500d8SDavid Howells unsigned char act_chans; /* Mask of active channels */ 427a1399f8bSDavid Howells struct rxrpc_channel { 4283136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 429a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4304764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 431a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 432a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 433a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 43418bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 43518bfeba5SDavid Howells union { 43618bfeba5SDavid Howells u32 last_seq; 43718bfeba5SDavid Howells u32 last_abort; 43818bfeba5SDavid Howells }; 439a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 440999b69f8SDavid Howells 4413136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 44217926a79SDavid Howells struct work_struct processor; /* connection event processor */ 443245500d8SDavid Howells struct rxrpc_bundle *bundle; /* Client connection bundle */ 444aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 4454d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 44617926a79SDavid Howells struct list_head link; /* link in master connection list */ 44717926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 448521bb304SDavid Howells 449648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 450521bb304SDavid Howells union { 451521bb304SDavid Howells struct { 45269d826faSKees Cook struct crypto_sync_skcipher *cipher; /* encryption handle */ 45317926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 454521bb304SDavid Howells u32 nonce; /* response re-use preventer */ 455521bb304SDavid Howells } rxkad; 456521bb304SDavid Howells }; 4574a3388c8SDavid Howells unsigned long flags; 45817926a79SDavid Howells unsigned long events; 459f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 46017926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 461cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 46264753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 46317926a79SDavid Howells int debug_id; /* debug ID for printks */ 46417926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 465563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 466c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 46717926a79SDavid Howells u8 security_ix; /* security type */ 46817926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 469245500d8SDavid Howells u8 bundle_shift; /* Index into bundle->avail_chans */ 47064753092SDavid Howells short error; /* Local error code */ 47117926a79SDavid Howells }; 47217926a79SDavid Howells 473dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 474dc71db34SDavid Howells { 475dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 476dc71db34SDavid Howells } 477dc71db34SDavid Howells 478dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 479dc71db34SDavid Howells { 480dc71db34SDavid Howells return !rxrpc_to_server(sp); 481dc71db34SDavid Howells } 482dc71db34SDavid Howells 48317926a79SDavid Howells /* 4845b8848d1SDavid Howells * Flags in call->flags. 4855b8848d1SDavid Howells */ 4865b8848d1SDavid Howells enum rxrpc_call_flag { 4875b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4885b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 489dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 49045025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 491248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 492248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 493a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 49457494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 495c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 4961a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 497d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 4985273a191SDavid Howells RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 499b7a7d674SDavid Howells RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 500245500d8SDavid Howells RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 5015b8848d1SDavid Howells }; 5025b8848d1SDavid Howells 5035b8848d1SDavid Howells /* 5045b8848d1SDavid Howells * Events that can be raised on a call. 5055b8848d1SDavid Howells */ 5065b8848d1SDavid Howells enum rxrpc_call_event { 5074c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 5084c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 5094c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 510a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 511a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 512bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 5135b8848d1SDavid Howells }; 5145b8848d1SDavid Howells 5155b8848d1SDavid Howells /* 5165b8848d1SDavid Howells * The states that a call can be in. 5175b8848d1SDavid Howells */ 5185b8848d1SDavid Howells enum rxrpc_call_state { 519999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 520999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5215b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5225b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5235b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 52400e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5255b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5265b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5275b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5285b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5295b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 530f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 531f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 532f5c17aaeSDavid Howells }; 533f5c17aaeSDavid Howells 534f5c17aaeSDavid Howells /* 535e122d845SDavid Howells * Call completion condition (state == RXRPC_CALL_COMPLETE). 536e122d845SDavid Howells */ 537e122d845SDavid Howells enum rxrpc_call_completion { 538e122d845SDavid Howells RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 539e122d845SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 540e122d845SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 541e122d845SDavid Howells RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 542e122d845SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 543e122d845SDavid Howells NR__RXRPC_CALL_COMPLETIONS 544e122d845SDavid Howells }; 545e122d845SDavid Howells 546e122d845SDavid Howells /* 54757494343SDavid Howells * Call Tx congestion management modes. 54857494343SDavid Howells */ 54957494343SDavid Howells enum rxrpc_congest_mode { 55057494343SDavid Howells RXRPC_CALL_SLOW_START, 55157494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 55257494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 55357494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 55457494343SDavid Howells NR__RXRPC_CONGEST_MODES 55557494343SDavid Howells }; 55657494343SDavid Howells 55757494343SDavid Howells /* 55817926a79SDavid Howells * RxRPC call definition 55917926a79SDavid Howells * - matched by { connection, call_id } 56017926a79SDavid Howells */ 56117926a79SDavid Howells struct rxrpc_call { 562dee46364SDavid Howells struct rcu_head rcu; 56317926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 564df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5658d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 566d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 56791fcfbe8SDavid Howells const struct rxrpc_security *security; /* applied security module */ 568540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 569a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 570bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 571a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 572a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 573415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 574a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 575a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 576a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 577a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 578a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 5791db88c53SDavid Howells struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 580248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 581248f219cSDavid Howells struct work_struct processor; /* Event processor */ 582d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 58317926a79SDavid Howells struct list_head link; /* link in master call list */ 584245500d8SDavid Howells struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 585f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 586248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 587248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 588248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 589248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 59017926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 59145025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 592e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 593a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 59417926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 59517926a79SDavid Howells unsigned long flags; 59617926a79SDavid Howells unsigned long events; 59717926a79SDavid Howells spinlock_t lock; 59820acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 59917926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 600f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 601f5c17aaeSDavid Howells int error; /* Local error incurred */ 602cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 603cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 604a0575429SDavid Howells refcount_t ref; 605dabe5a79SDavid Howells u16 service_id; /* service ID */ 606278ac0cdSDavid Howells u8 security_ix; /* Security type */ 607e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 608dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 609dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 610dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 6118e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 6128e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 613f9c32435SDavid Howells bool rx_pkt_last; /* Current recvmsg packet is last */ 61417926a79SDavid Howells 615248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 616248f219cSDavid Howells * 617248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 618248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 619248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 620248f219cSDavid Howells * 621248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 622248f219cSDavid Howells * acked. 62317926a79SDavid Howells */ 624248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 625248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 6264075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 627248f219cSDavid Howells struct sk_buff **rxtx_buffer; 628248f219cSDavid Howells u8 *rxtx_annotations; 629248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 630248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 631248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 632248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 633f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 63470790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 63570790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 63670790dbeSDavid Howells 637e2de6c40SDavid Howells #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 638248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 639248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 640248f219cSDavid Howells * not hard-ACK'd packet follows this. 641248f219cSDavid Howells */ 642248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 643c7e86acfSDavid Howells u16 tx_backoff; /* Delay to insert due to Tx failure */ 64457494343SDavid Howells 64557494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 64657494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 64757494343SDavid Howells * packets) rather than bytes. 64857494343SDavid Howells */ 64957494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 65057494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 65157494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 65257494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 65357494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 65457494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 65557494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 65657494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 65757494343SDavid Howells 658248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 659248f219cSDavid Howells * consumed packet follows this. 660248f219cSDavid Howells */ 661248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 662248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6631a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 664248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 665248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 66671f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 66775e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 66817926a79SDavid Howells 669c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 670c1e15b49SDavid Howells 6718940ba3cSDavid Howells /* Receive-phase ACK management (ACKs we send). */ 6724e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 6730d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 67481524b63SDavid Howells rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */ 6759a3dedcfSDavid Howells atomic_t ackr_nr_unacked; /* Number of unacked packets */ 6769a3dedcfSDavid Howells atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 677a5af7e1fSDavid Howells 6784700c4d8SDavid Howells /* RTT management */ 6794700c4d8SDavid Howells rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 6804700c4d8SDavid Howells ktime_t rtt_sent_at[4]; /* Time packet sent */ 6814700c4d8SDavid Howells unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 6824700c4d8SDavid Howells * Mask of pending samples in 8-11 */ 6834700c4d8SDavid Howells #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 6844700c4d8SDavid Howells #define RXRPC_CALL_RTT_PEND_SHIFT 8 68517926a79SDavid Howells 6868940ba3cSDavid Howells /* Transmission-phase ACK management (ACKs we've received). */ 68757494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 6888940ba3cSDavid Howells rxrpc_seq_t acks_first_seq; /* first sequence number received */ 68981524b63SDavid Howells rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 69031a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 691bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 692bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 693*589a0c1eSDavid Howells rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 69431a1b989SDavid Howells }; 69531a1b989SDavid Howells 69631a1b989SDavid Howells /* 69757494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 69831a1b989SDavid Howells */ 69931a1b989SDavid Howells struct rxrpc_ack_summary { 70031a1b989SDavid Howells u8 ack_reason; 70131a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 70231a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 70331a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 70431a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 70531a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 70631a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 70757494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 70857494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 70957494343SDavid Howells /* Place to stash values for tracing */ 71057494343SDavid Howells enum rxrpc_congest_mode mode:8; 71157494343SDavid Howells u8 cwnd; 71257494343SDavid Howells u8 ssthresh; 71357494343SDavid Howells u8 dup_acks; 71457494343SDavid Howells u8 cumulative_acks; 71517926a79SDavid Howells }; 71617926a79SDavid Howells 71748124178SDavid Howells /* 71848124178SDavid Howells * sendmsg() cmsg-specified parameters. 71948124178SDavid Howells */ 72048124178SDavid Howells enum rxrpc_command { 72148124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 72248124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 72348124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 7242d914c1bSDavid Howells RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 72548124178SDavid Howells }; 72648124178SDavid Howells 72748124178SDavid Howells struct rxrpc_call_params { 72848124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 72948124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 73048124178SDavid Howells struct { 73148124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 73248124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 73348124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 73448124178SDavid Howells } timeouts; 73548124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 736b7a7d674SDavid Howells bool kernel; /* T if kernel is making the call */ 737e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 73848124178SDavid Howells }; 73948124178SDavid Howells 74048124178SDavid Howells struct rxrpc_send_params { 74148124178SDavid Howells struct rxrpc_call_params call; 74248124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 74348124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 74448124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 74548124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 74648124178SDavid Howells }; 74748124178SDavid Howells 748df844fd4SDavid Howells #include <trace/events/rxrpc.h> 749df844fd4SDavid Howells 75017926a79SDavid Howells /* 751651350d1SDavid Howells * af_rxrpc.c 75217926a79SDavid Howells */ 75371f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 754651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 75517926a79SDavid Howells 75617926a79SDavid Howells /* 7570d81a51aSDavid Howells * call_accept.c 75817926a79SDavid Howells */ 75900e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 76000e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 761248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7620099dc58SDavid Howells struct rxrpc_sock *, 763248f219cSDavid Howells struct sk_buff *); 7644f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 7652d914c1bSDavid Howells int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 76617926a79SDavid Howells 76717926a79SDavid Howells /* 7680d81a51aSDavid Howells * call_event.c 76917926a79SDavid Howells */ 770e8c3af6bSDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 7719c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 772c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 77317926a79SDavid Howells 7744a7f62f9SDavid Howells void rxrpc_reduce_call_timer(struct rxrpc_call *call, 775a158bdd3SDavid Howells unsigned long expire_at, 776a158bdd3SDavid Howells unsigned long now, 7774a7f62f9SDavid Howells enum rxrpc_timer_trace why); 7784a7f62f9SDavid Howells 7794a7f62f9SDavid Howells void rxrpc_delete_call_timer(struct rxrpc_call *call); 780a158bdd3SDavid Howells 78117926a79SDavid Howells /* 7820d81a51aSDavid Howells * call_object.c 78317926a79SDavid Howells */ 784f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 785f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 78617926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 78717926a79SDavid Howells 7882341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 789a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7902341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 79119ffa01cSDavid Howells struct rxrpc_conn_parameters *, 792999b69f8SDavid Howells struct sockaddr_rxrpc *, 793a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 794a25e21f0SDavid Howells unsigned int); 795248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 79642886ffeSDavid Howells struct sk_buff *); 7978d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 798c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 7998d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 8008d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 801e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 8024a7f62f9SDavid Howells bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 803fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 804fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 80500e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 8062baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 80717926a79SDavid Howells 808dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 809dabe5a79SDavid Howells { 810dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 811dabe5a79SDavid Howells } 812dabe5a79SDavid Howells 813dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 814dabe5a79SDavid Howells { 815dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 816dabe5a79SDavid Howells } 817dabe5a79SDavid Howells 81817926a79SDavid Howells /* 8194a3388c8SDavid Howells * conn_client.c 8204a3388c8SDavid Howells */ 82145025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 822a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 823a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8244a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8254a3388c8SDavid Howells 826eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 827245500d8SDavid Howells struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 828245500d8SDavid Howells void rxrpc_put_bundle(struct rxrpc_bundle *); 8295e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 8305e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 8315e33a23bSDavid Howells gfp_t); 83245025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 833245500d8SDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 83445025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 8352baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 8362baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 837d12040b6SDavid Howells void rxrpc_clean_up_local_conns(struct rxrpc_local *); 8384a3388c8SDavid Howells 8394a3388c8SDavid Howells /* 8400d81a51aSDavid Howells * conn_event.c 8410d81a51aSDavid Howells */ 8420d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 843ddc7834aSDavid Howells void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 8440d81a51aSDavid Howells 8450d81a51aSDavid Howells /* 8460d81a51aSDavid Howells * conn_object.c 84717926a79SDavid Howells */ 848dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 849f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 85017926a79SDavid Howells 851c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 8528496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 8530099dc58SDavid Howells struct sk_buff *, 8540099dc58SDavid Howells struct rxrpc_peer **); 85545025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 856999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 85745025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 858363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 859363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 860245500d8SDavid Howells struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 861363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 862363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 8632baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 8642baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 86517926a79SDavid Howells 86619ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 86719ffa01cSDavid Howells { 86819ffa01cSDavid Howells return conn->out_clientflag; 86919ffa01cSDavid Howells } 87019ffa01cSDavid Howells 87119ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 87219ffa01cSDavid Howells { 873e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 87419ffa01cSDavid Howells } 87519ffa01cSDavid Howells 876f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 877f51b4480SDavid Howells { 87845025bceSDavid Howells if (!conn) 87945025bceSDavid Howells return; 88045025bceSDavid Howells 881363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 88245025bceSDavid Howells rxrpc_put_client_conn(conn); 883363deeabSDavid Howells else 884363deeabSDavid Howells rxrpc_put_service_conn(conn); 8855acbee46SDavid Howells } 8865acbee46SDavid Howells 8873136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 8883136ef49SDavid Howells unsigned long expire_at) 8893136ef49SDavid Howells { 8903136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 8913136ef49SDavid Howells } 8923136ef49SDavid Howells 89317926a79SDavid Howells /* 8947877a4a4SDavid Howells * conn_service.c 8957877a4a4SDavid Howells */ 8968496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 8978496af50SDavid Howells struct sk_buff *); 8982baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 899063c60d3SDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 900ec832bd0SDavid Howells const struct rxrpc_security *, struct sk_buff *); 901001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9027877a4a4SDavid Howells 9037877a4a4SDavid Howells /* 9040d81a51aSDavid Howells * input.c 90517926a79SDavid Howells */ 9065271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 90717926a79SDavid Howells 90817926a79SDavid Howells /* 9090d81a51aSDavid Howells * insecure.c 91017926a79SDavid Howells */ 9110d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 91217926a79SDavid Howells 91317926a79SDavid Howells /* 9140d81a51aSDavid Howells * key.c 91517926a79SDavid Howells */ 91617926a79SDavid Howells extern struct key_type key_type_rxrpc; 91717926a79SDavid Howells 918a7b75c5aSChristoph Hellwig int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 91910674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 920c1b1203dSJoe Perches u32); 92117926a79SDavid Howells 92217926a79SDavid Howells /* 92387563616SDavid Howells * local_event.c 92487563616SDavid Howells */ 9254f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 92687563616SDavid Howells 92787563616SDavid Howells /* 9280d81a51aSDavid Howells * local_object.c 92917926a79SDavid Howells */ 9302baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 93109d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 93209d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 93309d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 934730c5fd4SDavid Howells struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 935730c5fd4SDavid Howells void rxrpc_unuse_local(struct rxrpc_local *); 93609d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 9372baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 938e0e4d82fSDavid Howells 93904d36d74SDavid Howells static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 94004d36d74SDavid Howells { 94104d36d74SDavid Howells return atomic_dec_return(&local->active_users) == 0; 94204d36d74SDavid Howells } 94304d36d74SDavid Howells 94404d36d74SDavid Howells static inline bool __rxrpc_use_local(struct rxrpc_local *local) 94504d36d74SDavid Howells { 94604d36d74SDavid Howells return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 94704d36d74SDavid Howells } 94804d36d74SDavid Howells 949e0e4d82fSDavid Howells /* 9508e688d9cSDavid Howells * misc.c 9518e688d9cSDavid Howells */ 9520e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 953a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 954a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 955a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 9568e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 9578e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 9588e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 9598e688d9cSDavid Howells 9608e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 9618e688d9cSDavid Howells 9628e688d9cSDavid Howells /* 9632baec2c3SDavid Howells * net_ns.c 9642baec2c3SDavid Howells */ 9652baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 9662baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 9672baec2c3SDavid Howells 9682baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 9692baec2c3SDavid Howells { 9702baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 9712baec2c3SDavid Howells } 9722baec2c3SDavid Howells 9732baec2c3SDavid Howells /* 9740d81a51aSDavid Howells * output.c 9750d81a51aSDavid Howells */ 976bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 97726cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 978a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 979248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 980ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 9810d81a51aSDavid Howells 9820d81a51aSDavid Howells /* 983abe89ef0SDavid Howells * peer_event.c 9840d81a51aSDavid Howells */ 985ac56a0b4SDavid Howells void rxrpc_encap_err_rcv(struct sock *sk, struct sk_buff *skb, unsigned int udp_offset); 986abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 987ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 9880d81a51aSDavid Howells 9890d81a51aSDavid Howells /* 9900d81a51aSDavid Howells * peer_object.c 9910d81a51aSDavid Howells */ 992be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 993be6e6707SDavid Howells const struct sockaddr_rxrpc *); 9945e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 995be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 996be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 9975e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 9985e33a23bSDavid Howells struct rxrpc_peer *); 99917226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10001159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10011159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10021159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 100360034d3dSDavid Howells void rxrpc_put_peer_locked(struct rxrpc_peer *); 10040d81a51aSDavid Howells 10050d81a51aSDavid Howells /* 10060d81a51aSDavid Howells * proc.c 10070d81a51aSDavid Howells */ 1008c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1009c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 1010bc0e7cf4SDavid Howells extern const struct seq_operations rxrpc_peer_seq_ops; 101133912c26SDavid Howells extern const struct seq_operations rxrpc_local_seq_ops; 10120d81a51aSDavid Howells 10130d81a51aSDavid Howells /* 10140d81a51aSDavid Howells * recvmsg.c 10150d81a51aSDavid Howells */ 1016248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10173067bf8cSDavid Howells bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10183067bf8cSDavid Howells bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10193067bf8cSDavid Howells bool __rxrpc_call_completed(struct rxrpc_call *); 10203067bf8cSDavid Howells bool rxrpc_call_completed(struct rxrpc_call *); 10213067bf8cSDavid Howells bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10223067bf8cSDavid Howells bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10230d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10240d81a51aSDavid Howells 10250d81a51aSDavid Howells /* 10263067bf8cSDavid Howells * Abort a call due to a protocol error. 10273067bf8cSDavid Howells */ 10283067bf8cSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 10293067bf8cSDavid Howells struct sk_buff *skb, 10303067bf8cSDavid Howells const char *eproto_why, 10313067bf8cSDavid Howells const char *why, 10323067bf8cSDavid Howells u32 abort_code) 10333067bf8cSDavid Howells { 10343067bf8cSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 10353067bf8cSDavid Howells 10363067bf8cSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 10373067bf8cSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 10383067bf8cSDavid Howells } 10393067bf8cSDavid Howells 10403067bf8cSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 10413067bf8cSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 10423067bf8cSDavid Howells (abort_why), (abort_code)) 10433067bf8cSDavid Howells 10443067bf8cSDavid Howells /* 1045c410bf01SDavid Howells * rtt.c 1046c410bf01SDavid Howells */ 10474700c4d8SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1048c410bf01SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1049c410bf01SDavid Howells unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1050c410bf01SDavid Howells void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1051c410bf01SDavid Howells 1052c410bf01SDavid Howells /* 1053648af7fcSDavid Howells * rxkad.c 1054648af7fcSDavid Howells */ 1055648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1056648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1057648af7fcSDavid Howells #endif 1058648af7fcSDavid Howells 1059648af7fcSDavid Howells /* 10600d81a51aSDavid Howells * security.c 10610d81a51aSDavid Howells */ 10620d81a51aSDavid Howells int __init rxrpc_init_security(void); 106312da59fcSDavid Howells const struct rxrpc_security *rxrpc_security_lookup(u8); 10640d81a51aSDavid Howells void rxrpc_exit_security(void); 10650d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1066ec832bd0SDavid Howells const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1067063c60d3SDavid Howells struct sk_buff *); 1068ec832bd0SDavid Howells struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1069ec832bd0SDavid Howells struct sk_buff *, u32, u32); 10700d81a51aSDavid Howells 10710d81a51aSDavid Howells /* 10720b58b8a1SDavid Howells * sendmsg.c 10730b58b8a1SDavid Howells */ 10740b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 10750b58b8a1SDavid Howells 10760b58b8a1SDavid Howells /* 1077ca7fb100SDavid Howells * server_key.c 1078ca7fb100SDavid Howells */ 1079ca7fb100SDavid Howells extern struct key_type key_type_rxrpc_s; 1080ca7fb100SDavid Howells 1081ca7fb100SDavid Howells int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1082ca7fb100SDavid Howells 1083ca7fb100SDavid Howells /* 10840d81a51aSDavid Howells * skbuff.c 10850d81a51aSDavid Howells */ 1086d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 10870d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 108871f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 108971f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1090d0d5c0cdSDavid Howells void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 109171f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 109271f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1093df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 10940d81a51aSDavid Howells 10950d81a51aSDavid Howells /* 10965873c083SDavid Howells * sysctl.c 10975873c083SDavid Howells */ 10985873c083SDavid Howells #ifdef CONFIG_SYSCTL 10995873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11005873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11015873c083SDavid Howells #else 11025873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11035873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11045873c083SDavid Howells #endif 11055873c083SDavid Howells 11065873c083SDavid Howells /* 1107be6e6707SDavid Howells * utils.c 1108be6e6707SDavid Howells */ 11095a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1110be6e6707SDavid Howells 1111248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1112248f219cSDavid Howells { 1113248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1114248f219cSDavid Howells } 1115248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1116248f219cSDavid Howells { 1117248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1118248f219cSDavid Howells } 1119248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1120248f219cSDavid Howells { 1121248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1122248f219cSDavid Howells } 1123248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1124248f219cSDavid Howells { 1125248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1126248f219cSDavid Howells } 1127248f219cSDavid Howells 1128be6e6707SDavid Howells /* 112917926a79SDavid Howells * debug tracing 113017926a79SDavid Howells */ 113195c96174SEric Dumazet extern unsigned int rxrpc_debug; 113217926a79SDavid Howells 113317926a79SDavid Howells #define dbgprintk(FMT,...) \ 11349f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 113517926a79SDavid Howells 11360dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11370dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 113817926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 113917926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 114017926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 114117926a79SDavid Howells 114217926a79SDavid Howells 114317926a79SDavid Howells #if defined(__KDEBUG) 114417926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 114517926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 114617926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 114717926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 114817926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 114917926a79SDavid Howells 115017926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 115117926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 115217926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 115317926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 115417926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 115517926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 115617926a79SDavid Howells 115717926a79SDavid Howells #define _enter(FMT,...) \ 115817926a79SDavid Howells do { \ 115917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 116017926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 116117926a79SDavid Howells } while (0) 116217926a79SDavid Howells 116317926a79SDavid Howells #define _leave(FMT,...) \ 116417926a79SDavid Howells do { \ 116517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 116617926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 116717926a79SDavid Howells } while (0) 116817926a79SDavid Howells 116917926a79SDavid Howells #define _debug(FMT,...) \ 117017926a79SDavid Howells do { \ 117117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 117217926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 117317926a79SDavid Howells } while (0) 117417926a79SDavid Howells 117517926a79SDavid Howells #define _proto(FMT,...) \ 117617926a79SDavid Howells do { \ 117717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 117817926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 117917926a79SDavid Howells } while (0) 118017926a79SDavid Howells 118117926a79SDavid Howells #define _net(FMT,...) \ 118217926a79SDavid Howells do { \ 118317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 118417926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 118517926a79SDavid Howells } while (0) 118617926a79SDavid Howells 118717926a79SDavid Howells #else 118812fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 118912fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 119012fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 119112fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 119212fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 119317926a79SDavid Howells #endif 119417926a79SDavid Howells 119517926a79SDavid Howells /* 119617926a79SDavid Howells * debug assertion checking 119717926a79SDavid Howells */ 119817926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 119917926a79SDavid Howells 120017926a79SDavid Howells #define ASSERT(X) \ 120117926a79SDavid Howells do { \ 120217926a79SDavid Howells if (unlikely(!(X))) { \ 12039b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 120417926a79SDavid Howells BUG(); \ 120517926a79SDavid Howells } \ 120617926a79SDavid Howells } while (0) 120717926a79SDavid Howells 120817926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 120917926a79SDavid Howells do { \ 1210cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1211cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12129b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12139b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1214cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1215cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 121617926a79SDavid Howells BUG(); \ 121717926a79SDavid Howells } \ 121817926a79SDavid Howells } while (0) 121917926a79SDavid Howells 122017926a79SDavid Howells #define ASSERTIF(C, X) \ 122117926a79SDavid Howells do { \ 122217926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12239b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 122417926a79SDavid Howells BUG(); \ 122517926a79SDavid Howells } \ 122617926a79SDavid Howells } while (0) 122717926a79SDavid Howells 122817926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 122917926a79SDavid Howells do { \ 1230cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1231cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12329b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12339b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1234cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1235cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 123617926a79SDavid Howells BUG(); \ 123717926a79SDavid Howells } \ 123817926a79SDavid Howells } while (0) 123917926a79SDavid Howells 124017926a79SDavid Howells #else 124117926a79SDavid Howells 124217926a79SDavid Howells #define ASSERT(X) \ 124317926a79SDavid Howells do { \ 124417926a79SDavid Howells } while (0) 124517926a79SDavid Howells 124617926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 124717926a79SDavid Howells do { \ 124817926a79SDavid Howells } while (0) 124917926a79SDavid Howells 125017926a79SDavid Howells #define ASSERTIF(C, X) \ 125117926a79SDavid Howells do { \ 125217926a79SDavid Howells } while (0) 125317926a79SDavid Howells 125417926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 125517926a79SDavid Howells do { \ 125617926a79SDavid Howells } while (0) 125717926a79SDavid Howells 125817926a79SDavid Howells #endif /* __KDEBUGALL */ 1259