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 #if 0 1917926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 2017926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 2117926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 2217926a79SDavid Howells #else 2317926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2417926a79SDavid Howells #endif 2517926a79SDavid Howells 2617926a79SDavid Howells #define FCRYPT_BSIZE 8 2717926a79SDavid Howells struct rxrpc_crypt { 2817926a79SDavid Howells union { 2917926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 3091e916cfSAl Viro __be32 n[2]; 3117926a79SDavid Howells }; 3217926a79SDavid Howells } __attribute__((aligned(8))); 3317926a79SDavid Howells 34651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 35651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 36651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 37651350d1SDavid Howells 3812da59fcSDavid Howells struct key_preparsed_payload; 39cc8feb8eSDavid Howells struct rxrpc_connection; 40cc8feb8eSDavid Howells 4117926a79SDavid Howells /* 42ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 43ece64fecSDavid Howells * to pass supplementary information. 44d001648eSDavid Howells */ 45d001648eSDavid Howells enum rxrpc_skb_mark { 46ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 47ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 48d001648eSDavid Howells }; 49d001648eSDavid Howells 50d001648eSDavid Howells /* 5117926a79SDavid Howells * sk_state for RxRPC sockets 5217926a79SDavid Howells */ 5317926a79SDavid Howells enum { 542341e077SDavid Howells RXRPC_UNBOUND = 0, 552341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 5617926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 5717926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5828036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 5917926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 60210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 6117926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 6217926a79SDavid Howells }; 6317926a79SDavid Howells 6417926a79SDavid Howells /* 652baec2c3SDavid Howells * Per-network namespace data. 662baec2c3SDavid Howells */ 672baec2c3SDavid Howells struct rxrpc_net { 682baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 692baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 702baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 712baec2c3SDavid Howells rwlock_t call_lock; /* Lock for ->calls */ 72d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 732baec2c3SDavid Howells 7431f5f9a1SDavid Howells atomic_t nr_conns; 752baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 762baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 772baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 783d18cbb7SDavid Howells struct work_struct service_conn_reaper; 793d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 802baec2c3SDavid Howells 81f859ab61SDavid Howells bool live; 82245500d8SDavid Howells 83245500d8SDavid Howells bool kill_all_client_conns; 84245500d8SDavid Howells atomic_t nr_client_conns; 852baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 862baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 872baec2c3SDavid Howells struct list_head idle_client_conns; 883d18cbb7SDavid Howells struct work_struct client_conn_reaper; 893d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 902baec2c3SDavid Howells 912baec2c3SDavid Howells struct list_head local_endpoints; 922baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 932baec2c3SDavid Howells 942baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 95ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 96ace45becSDavid Howells 97ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 98ace45becSDavid Howells u8 peer_keepalive_cursor; 99330bdcfaSDavid Howells time64_t peer_keepalive_base; 100330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 101330bdcfaSDavid Howells struct list_head peer_keepalive_new; 102ace45becSDavid Howells struct timer_list peer_keepalive_timer; 103ace45becSDavid Howells struct work_struct peer_keepalive_work; 1042baec2c3SDavid Howells }; 1052baec2c3SDavid Howells 1062baec2c3SDavid Howells /* 10700e90712SDavid Howells * Service backlog preallocation. 10800e90712SDavid Howells * 10900e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 11000e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 11100e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 11200e90712SDavid Howells * shuffle packets around so much. 11300e90712SDavid Howells */ 11400e90712SDavid Howells struct rxrpc_backlog { 11500e90712SDavid Howells unsigned short peer_backlog_head; 11600e90712SDavid Howells unsigned short peer_backlog_tail; 11700e90712SDavid Howells unsigned short conn_backlog_head; 11800e90712SDavid Howells unsigned short conn_backlog_tail; 11900e90712SDavid Howells unsigned short call_backlog_head; 12000e90712SDavid Howells unsigned short call_backlog_tail; 12100e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 12200e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 12300e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 12400e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 12500e90712SDavid Howells }; 12600e90712SDavid Howells 12700e90712SDavid Howells /* 12817926a79SDavid Howells * RxRPC socket definition 12917926a79SDavid Howells */ 13017926a79SDavid Howells struct rxrpc_sock { 13117926a79SDavid Howells /* WARNING: sk has to be the first member */ 13217926a79SDavid Howells struct sock sk; 133d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 13400e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 13517926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 13600e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 137248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 138248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 139248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 140248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 141248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 14217926a79SDavid Howells struct key *key; /* security for this socket */ 14317926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 14400e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 14517926a79SDavid Howells unsigned long flags; 1462341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 14717926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 14817926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 14917926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 150cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 15128036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1524722974dSDavid Howells struct { 1534722974dSDavid Howells /* Service upgrade information */ 1544722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1554722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1564722974dSDavid Howells } service_upgrade; 157cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1584722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1592341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 16017926a79SDavid Howells }; 16117926a79SDavid Howells 16217926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 16317926a79SDavid Howells 16417926a79SDavid Howells /* 1650d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1660d12f8a4SDavid Howells */ 1670d12f8a4SDavid Howells struct rxrpc_host_header { 1680d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1690d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1700d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1710d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1720d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1730d12f8a4SDavid Howells u8 type; /* packet type */ 1740d12f8a4SDavid Howells u8 flags; /* packet flags */ 1750d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1760d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1770d12f8a4SDavid Howells union { 1780d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1790d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1800d12f8a4SDavid Howells }; 1810d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1820d12f8a4SDavid Howells } __packed; 1830d12f8a4SDavid Howells 1840d12f8a4SDavid Howells /* 18517926a79SDavid Howells * RxRPC socket buffer private variables 18617926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 18717926a79SDavid Howells */ 18817926a79SDavid Howells struct rxrpc_skb_priv { 189987db9f7SDavid Howells atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 190c3c9e3dfSDavid Howells u8 nr_subpackets; /* Number of subpackets */ 191c3c9e3dfSDavid Howells u8 rx_flags; /* Received packet flags */ 192c3c9e3dfSDavid Howells #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 193b311e684SDavid Howells #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 19417926a79SDavid Howells union { 19517926a79SDavid Howells int remain; /* amount of space remaining for next write */ 196c3c9e3dfSDavid Howells 197c3c9e3dfSDavid Howells /* List of requested ACKs on subpackets */ 198c3c9e3dfSDavid Howells unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 199c3c9e3dfSDavid Howells BITS_PER_LONG]; 20017926a79SDavid Howells }; 20117926a79SDavid Howells 2020d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 20317926a79SDavid Howells }; 20417926a79SDavid Howells 20517926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 20617926a79SDavid Howells 20717926a79SDavid Howells /* 20817926a79SDavid Howells * RxRPC security module interface 20917926a79SDavid Howells */ 21017926a79SDavid Howells struct rxrpc_security { 21117926a79SDavid Howells const char *name; /* name of this service */ 21217926a79SDavid Howells u8 security_index; /* security type provided */ 213063c60d3SDavid Howells u32 no_key_abort; /* Abort code indicating no key */ 21417926a79SDavid Howells 215648af7fcSDavid Howells /* Initialise a security service */ 216648af7fcSDavid Howells int (*init)(void); 217648af7fcSDavid Howells 218648af7fcSDavid Howells /* Clean up a security service */ 219648af7fcSDavid Howells void (*exit)(void); 220648af7fcSDavid Howells 22112da59fcSDavid Howells /* Parse the information from a server key */ 22212da59fcSDavid Howells int (*preparse_server_key)(struct key_preparsed_payload *); 22312da59fcSDavid Howells 22412da59fcSDavid Howells /* Clean up the preparse buffer after parsing a server key */ 22512da59fcSDavid Howells void (*free_preparse_server_key)(struct key_preparsed_payload *); 22612da59fcSDavid Howells 22712da59fcSDavid Howells /* Destroy the payload of a server key */ 22812da59fcSDavid Howells void (*destroy_server_key)(struct key *); 22912da59fcSDavid Howells 230d5953f65SDavid Howells /* Describe a server key */ 231d5953f65SDavid Howells void (*describe_server_key)(const struct key *, struct seq_file *); 232d5953f65SDavid Howells 23317926a79SDavid Howells /* initialise a connection's security */ 23441057ebdSDavid Howells int (*init_connection_security)(struct rxrpc_connection *, 23541057ebdSDavid Howells struct rxrpc_key_token *); 23617926a79SDavid Howells 23717926a79SDavid Howells 23817926a79SDavid Howells /* impose security on a packet */ 239f4bdf3d6SDavid Howells int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 24017926a79SDavid Howells 24117926a79SDavid Howells /* verify the security on a received packet */ 2425a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 243248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 244248f219cSDavid Howells 2451db88c53SDavid Howells /* Free crypto request on a call */ 2461db88c53SDavid Howells void (*free_call_crypto)(struct rxrpc_call *); 2471db88c53SDavid Howells 248248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 249248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 250248f219cSDavid Howells unsigned int *, unsigned int *); 25117926a79SDavid Howells 25217926a79SDavid Howells /* issue a challenge */ 25317926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 25417926a79SDavid Howells 25517926a79SDavid Howells /* respond to a challenge */ 25617926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 25717926a79SDavid Howells struct sk_buff *, 25817926a79SDavid Howells u32 *); 25917926a79SDavid Howells 26017926a79SDavid Howells /* verify a response */ 26117926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 26217926a79SDavid Howells struct sk_buff *, 26317926a79SDavid Howells u32 *); 26417926a79SDavid Howells 26517926a79SDavid Howells /* clear connection security */ 26617926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 26717926a79SDavid Howells }; 26817926a79SDavid Howells 26917926a79SDavid Howells /* 2704f95dd78SDavid Howells * RxRPC local transport endpoint description 2714f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2724f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 27317926a79SDavid Howells */ 27417926a79SDavid Howells struct rxrpc_local { 2754f95dd78SDavid Howells struct rcu_head rcu; 276730c5fd4SDavid Howells atomic_t active_users; /* Number of users of the local endpoint */ 277730c5fd4SDavid Howells atomic_t usage; /* Number of references to the structure */ 2782baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 2794f95dd78SDavid Howells struct list_head link; 28017926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2814f95dd78SDavid Howells struct work_struct processor; 2821e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 28317926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 28417926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 28544ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 286245500d8SDavid Howells struct rb_root client_bundles; /* Client connection bundles by socket params */ 287245500d8SDavid Howells spinlock_t client_bundles_lock; /* Lock for client_bundles */ 28817926a79SDavid Howells spinlock_t lock; /* access lock */ 28917926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 29017926a79SDavid Howells int debug_id; /* debug ID for printks */ 2914f95dd78SDavid Howells bool dead; 292f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 29317926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 29417926a79SDavid Howells }; 29517926a79SDavid Howells 29617926a79SDavid Howells /* 29717926a79SDavid Howells * RxRPC remote transport endpoint definition 298be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 29917926a79SDavid Howells */ 30017926a79SDavid Howells struct rxrpc_peer { 301be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 302be6e6707SDavid Howells atomic_t usage; 303be6e6707SDavid Howells unsigned long hash_key; 304be6e6707SDavid Howells struct hlist_node hash_link; 305be6e6707SDavid Howells struct rxrpc_local *local; 306f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 307aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 308330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 309ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 3108496af50SDavid Howells seqlock_t service_conn_lock; 31117926a79SDavid Howells spinlock_t lock; /* access lock */ 31295c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 31395c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 31495c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 31517926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 31617926a79SDavid Howells int debug_id; /* debug ID for printks */ 31717926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 31817926a79SDavid Howells 31917926a79SDavid Howells /* calculated RTT cache */ 32017926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 321c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3220d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 323c410bf01SDavid Howells unsigned int rtt_count; /* Number of samples we've got */ 324c410bf01SDavid Howells 325c410bf01SDavid Howells u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 326c410bf01SDavid Howells u32 mdev_us; /* medium deviation */ 327c410bf01SDavid Howells u32 mdev_max_us; /* maximal mdev for the last rtt period */ 328c410bf01SDavid Howells u32 rttvar_us; /* smoothed mdev_max */ 329c410bf01SDavid Howells u32 rto_j; /* Retransmission timeout in jiffies */ 330c410bf01SDavid Howells u8 backoff; /* Backoff timeout */ 331f7aec129SDavid Howells 332f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 33317926a79SDavid Howells }; 33417926a79SDavid Howells 33517926a79SDavid Howells /* 33619ffa01cSDavid Howells * Keys for matching a connection. 33719ffa01cSDavid Howells */ 33819ffa01cSDavid Howells struct rxrpc_conn_proto { 339e8d70ce1SDavid Howells union { 340e8d70ce1SDavid Howells struct { 34119ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 34219ffa01cSDavid Howells u32 cid; /* connection ID */ 343e8d70ce1SDavid Howells }; 344e8d70ce1SDavid Howells u64 index_key; 34519ffa01cSDavid Howells }; 34619ffa01cSDavid Howells }; 34719ffa01cSDavid Howells 34819ffa01cSDavid Howells struct rxrpc_conn_parameters { 34919ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 35019ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 35119ffa01cSDavid Howells struct key *key; /* Security details */ 35219ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3534e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 35419ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 35519ffa01cSDavid Howells u32 security_level; /* Security level selected */ 35619ffa01cSDavid Howells }; 35719ffa01cSDavid Howells 35819ffa01cSDavid Howells /* 359bba304dbSDavid Howells * Bits in the connection flags. 360bba304dbSDavid Howells */ 361bba304dbSDavid Howells enum rxrpc_conn_flag { 362bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 363001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 36445025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 3654e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3663136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3673136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3683136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3693136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 370bba304dbSDavid Howells }; 371bba304dbSDavid Howells 3723136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3733136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3743136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3753136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3763136ef49SDavid Howells 377bba304dbSDavid Howells /* 378bba304dbSDavid Howells * Events that can be raised upon a connection. 379bba304dbSDavid Howells */ 380bba304dbSDavid Howells enum rxrpc_conn_event { 381bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 382bba304dbSDavid Howells }; 383bba304dbSDavid Howells 384bba304dbSDavid Howells /* 385bba304dbSDavid Howells * The connection protocol state. 386bba304dbSDavid Howells */ 387bba304dbSDavid Howells enum rxrpc_conn_proto_state { 388bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 389bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 39000e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 391bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 392bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 393bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 394bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 395bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 396bba304dbSDavid Howells RXRPC_CONN__NR_STATES 397bba304dbSDavid Howells }; 398bba304dbSDavid Howells 399bba304dbSDavid Howells /* 400245500d8SDavid Howells * RxRPC client connection bundle. 401245500d8SDavid Howells */ 402245500d8SDavid Howells struct rxrpc_bundle { 403245500d8SDavid Howells struct rxrpc_conn_parameters params; 404245500d8SDavid Howells atomic_t usage; 405245500d8SDavid Howells unsigned int debug_id; 406245500d8SDavid Howells bool try_upgrade; /* True if the bundle is attempting upgrade */ 407245500d8SDavid Howells bool alloc_conn; /* True if someone's getting a conn */ 4088806245aSDavid Howells short alloc_error; /* Error from last conn allocation */ 409245500d8SDavid Howells spinlock_t channel_lock; 410245500d8SDavid Howells struct rb_node local_node; /* Node in local->client_conns */ 411245500d8SDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 412245500d8SDavid Howells unsigned long avail_chans; /* Mask of available channels */ 413245500d8SDavid Howells struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 414245500d8SDavid Howells }; 415245500d8SDavid Howells 416245500d8SDavid Howells /* 41717926a79SDavid Howells * RxRPC connection definition 418aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 41917926a79SDavid Howells * - each connection can only handle four simultaneous calls 42017926a79SDavid Howells */ 42117926a79SDavid Howells struct rxrpc_connection { 42219ffa01cSDavid Howells struct rxrpc_conn_proto proto; 42319ffa01cSDavid Howells struct rxrpc_conn_parameters params; 42419ffa01cSDavid Howells 42545025bceSDavid Howells atomic_t usage; 42645025bceSDavid Howells struct rcu_head rcu; 42745025bceSDavid Howells struct list_head cache_link; 428a1399f8bSDavid Howells 429245500d8SDavid Howells unsigned char act_chans; /* Mask of active channels */ 430a1399f8bSDavid Howells struct rxrpc_channel { 4313136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 432a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4334764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 434a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 435a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 436a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 43718bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 43818bfeba5SDavid Howells union { 43918bfeba5SDavid Howells u32 last_seq; 44018bfeba5SDavid Howells u32 last_abort; 44118bfeba5SDavid Howells }; 442a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 443999b69f8SDavid Howells 4443136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 44517926a79SDavid Howells struct work_struct processor; /* connection event processor */ 446245500d8SDavid Howells struct rxrpc_bundle *bundle; /* Client connection bundle */ 447aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 4484d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 44917926a79SDavid Howells struct list_head link; /* link in master connection list */ 45017926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 451*521bb304SDavid Howells 452648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 453*521bb304SDavid Howells union { 454*521bb304SDavid Howells struct { 45569d826faSKees Cook struct crypto_sync_skcipher *cipher; /* encryption handle */ 45617926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 457*521bb304SDavid Howells u32 nonce; /* response re-use preventer */ 458*521bb304SDavid Howells } rxkad; 459*521bb304SDavid Howells }; 4604a3388c8SDavid Howells unsigned long flags; 46117926a79SDavid Howells unsigned long events; 462f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 46317926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 464cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 46564753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 46617926a79SDavid Howells int debug_id; /* debug ID for printks */ 46717926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 468563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 469c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 4705a924b89SDavid Howells u8 size_align; /* data size alignment (for security) */ 4715a924b89SDavid Howells u8 security_size; /* security header size */ 47217926a79SDavid Howells u8 security_ix; /* security type */ 47317926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 474245500d8SDavid Howells u8 bundle_shift; /* Index into bundle->avail_chans */ 47564753092SDavid Howells short error; /* Local error code */ 47617926a79SDavid Howells }; 47717926a79SDavid Howells 478dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 479dc71db34SDavid Howells { 480dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 481dc71db34SDavid Howells } 482dc71db34SDavid Howells 483dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 484dc71db34SDavid Howells { 485dc71db34SDavid Howells return !rxrpc_to_server(sp); 486dc71db34SDavid Howells } 487dc71db34SDavid Howells 48817926a79SDavid Howells /* 4895b8848d1SDavid Howells * Flags in call->flags. 4905b8848d1SDavid Howells */ 4915b8848d1SDavid Howells enum rxrpc_call_flag { 4925b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4935b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 494dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 49545025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 496248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 497248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 498a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 49957494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 500c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 5011a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 502d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 5035273a191SDavid Howells RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 504b7a7d674SDavid Howells RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 505245500d8SDavid Howells RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 5065b8848d1SDavid Howells }; 5075b8848d1SDavid Howells 5085b8848d1SDavid Howells /* 5095b8848d1SDavid Howells * Events that can be raised on a call. 5105b8848d1SDavid Howells */ 5115b8848d1SDavid Howells enum rxrpc_call_event { 5124c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 5134c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 5144c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 515a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 516a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 517bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 5185b8848d1SDavid Howells }; 5195b8848d1SDavid Howells 5205b8848d1SDavid Howells /* 5215b8848d1SDavid Howells * The states that a call can be in. 5225b8848d1SDavid Howells */ 5235b8848d1SDavid Howells enum rxrpc_call_state { 524999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 525999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5265b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5275b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5285b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 52900e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5305b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5315b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5325b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5335b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5345b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 535f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 536f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 537f5c17aaeSDavid Howells }; 538f5c17aaeSDavid Howells 539f5c17aaeSDavid Howells /* 540e122d845SDavid Howells * Call completion condition (state == RXRPC_CALL_COMPLETE). 541e122d845SDavid Howells */ 542e122d845SDavid Howells enum rxrpc_call_completion { 543e122d845SDavid Howells RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 544e122d845SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 545e122d845SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 546e122d845SDavid Howells RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 547e122d845SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 548e122d845SDavid Howells NR__RXRPC_CALL_COMPLETIONS 549e122d845SDavid Howells }; 550e122d845SDavid Howells 551e122d845SDavid Howells /* 55257494343SDavid Howells * Call Tx congestion management modes. 55357494343SDavid Howells */ 55457494343SDavid Howells enum rxrpc_congest_mode { 55557494343SDavid Howells RXRPC_CALL_SLOW_START, 55657494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 55757494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 55857494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 55957494343SDavid Howells NR__RXRPC_CONGEST_MODES 56057494343SDavid Howells }; 56157494343SDavid Howells 56257494343SDavid Howells /* 56317926a79SDavid Howells * RxRPC call definition 56417926a79SDavid Howells * - matched by { connection, call_id } 56517926a79SDavid Howells */ 56617926a79SDavid Howells struct rxrpc_call { 567dee46364SDavid Howells struct rcu_head rcu; 56817926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 569df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5708d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 571d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 57291fcfbe8SDavid Howells const struct rxrpc_security *security; /* applied security module */ 573540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 574a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 575bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 576a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 577a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 578415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 579a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 580a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 581a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 582a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 583a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 5841db88c53SDavid Howells struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 585248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 586248f219cSDavid Howells struct work_struct processor; /* Event processor */ 587d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 58817926a79SDavid Howells struct list_head link; /* link in master call list */ 589245500d8SDavid Howells struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 590f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 591248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 592248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 593248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 594248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 59517926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 59645025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 597e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 598a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 59917926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 60017926a79SDavid Howells unsigned long flags; 60117926a79SDavid Howells unsigned long events; 60217926a79SDavid Howells spinlock_t lock; 60320acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 60417926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 605f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 606f5c17aaeSDavid Howells int error; /* Local error incurred */ 607cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 608cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 60917926a79SDavid Howells atomic_t usage; 610dabe5a79SDavid Howells u16 service_id; /* service ID */ 611278ac0cdSDavid Howells u8 security_ix; /* Security type */ 612e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 613dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 614dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 615dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 6168e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 6178e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 618f9c32435SDavid Howells bool rx_pkt_last; /* Current recvmsg packet is last */ 61917926a79SDavid Howells 620248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 621248f219cSDavid Howells * 622248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 623248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 624248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 625248f219cSDavid Howells * 626248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 627248f219cSDavid Howells * acked. 62817926a79SDavid Howells */ 629248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 630248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 6314075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 632248f219cSDavid Howells struct sk_buff **rxtx_buffer; 633248f219cSDavid Howells u8 *rxtx_annotations; 634248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 635248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 636248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 637248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 638f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 63970790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 64070790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 64170790dbeSDavid Howells 642e2de6c40SDavid Howells #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 643248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 644248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 645248f219cSDavid Howells * not hard-ACK'd packet follows this. 646248f219cSDavid Howells */ 647248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 648c7e86acfSDavid Howells u16 tx_backoff; /* Delay to insert due to Tx failure */ 64957494343SDavid Howells 65057494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 65157494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 65257494343SDavid Howells * packets) rather than bytes. 65357494343SDavid Howells */ 65457494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 65557494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 65657494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 65757494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 65857494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 65957494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 66057494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 66157494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 66257494343SDavid Howells 663248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 664248f219cSDavid Howells * consumed packet follows this. 665248f219cSDavid Howells */ 666248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 667248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6681a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 669248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 670248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 67171f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 67275e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 67317926a79SDavid Howells 674c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 675c1e15b49SDavid Howells 67617926a79SDavid Howells /* receive-phase ACK management */ 6774e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 6780d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 6791a2391c3SJeffrey Altman rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 680248f219cSDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 681805b21b9SDavid Howells rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 682805b21b9SDavid Howells rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 683a5af7e1fSDavid Howells 6844700c4d8SDavid Howells /* RTT management */ 6854700c4d8SDavid Howells rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 6864700c4d8SDavid Howells ktime_t rtt_sent_at[4]; /* Time packet sent */ 6874700c4d8SDavid Howells unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 6884700c4d8SDavid Howells * Mask of pending samples in 8-11 */ 6894700c4d8SDavid Howells #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 6904700c4d8SDavid Howells #define RXRPC_CALL_RTT_PEND_SHIFT 8 69117926a79SDavid Howells 692248f219cSDavid Howells /* transmission-phase ACK management */ 69357494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 69431a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 695bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 696bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 69731a1b989SDavid Howells }; 69831a1b989SDavid Howells 69931a1b989SDavid Howells /* 70057494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 70131a1b989SDavid Howells */ 70231a1b989SDavid Howells struct rxrpc_ack_summary { 70331a1b989SDavid Howells u8 ack_reason; 70431a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 70531a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 70631a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 70731a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 70831a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 70931a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 71057494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 71157494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 71257494343SDavid Howells /* Place to stash values for tracing */ 71357494343SDavid Howells enum rxrpc_congest_mode mode:8; 71457494343SDavid Howells u8 cwnd; 71557494343SDavid Howells u8 ssthresh; 71657494343SDavid Howells u8 dup_acks; 71757494343SDavid Howells u8 cumulative_acks; 71817926a79SDavid Howells }; 71917926a79SDavid Howells 72048124178SDavid Howells /* 72148124178SDavid Howells * sendmsg() cmsg-specified parameters. 72248124178SDavid Howells */ 72348124178SDavid Howells enum rxrpc_command { 72448124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 72548124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 72648124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 7272d914c1bSDavid Howells RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 72848124178SDavid Howells }; 72948124178SDavid Howells 73048124178SDavid Howells struct rxrpc_call_params { 73148124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 73248124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 73348124178SDavid Howells struct { 73448124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 73548124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 73648124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 73748124178SDavid Howells } timeouts; 73848124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 739b7a7d674SDavid Howells bool kernel; /* T if kernel is making the call */ 740e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 74148124178SDavid Howells }; 74248124178SDavid Howells 74348124178SDavid Howells struct rxrpc_send_params { 74448124178SDavid Howells struct rxrpc_call_params call; 74548124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 74648124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 74748124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 74848124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 74948124178SDavid Howells }; 75048124178SDavid Howells 751df844fd4SDavid Howells #include <trace/events/rxrpc.h> 752df844fd4SDavid Howells 75317926a79SDavid Howells /* 754651350d1SDavid Howells * af_rxrpc.c 75517926a79SDavid Howells */ 75671f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 757651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 75817926a79SDavid Howells 75917926a79SDavid Howells /* 7600d81a51aSDavid Howells * call_accept.c 76117926a79SDavid Howells */ 76200e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 76300e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 764248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7650099dc58SDavid Howells struct rxrpc_sock *, 766248f219cSDavid Howells struct sk_buff *); 7674f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 7682d914c1bSDavid Howells int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 76917926a79SDavid Howells 77017926a79SDavid Howells /* 7710d81a51aSDavid Howells * call_event.c 77217926a79SDavid Howells */ 773e8c3af6bSDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 7749c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 775c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 77617926a79SDavid Howells 777a158bdd3SDavid Howells static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 778a158bdd3SDavid Howells unsigned long expire_at, 779a158bdd3SDavid Howells unsigned long now, 780a158bdd3SDavid Howells enum rxrpc_timer_trace why) 781a158bdd3SDavid Howells { 782a158bdd3SDavid Howells trace_rxrpc_timer(call, why, now); 783a158bdd3SDavid Howells timer_reduce(&call->timer, expire_at); 784a158bdd3SDavid Howells } 785a158bdd3SDavid Howells 78617926a79SDavid Howells /* 7870d81a51aSDavid Howells * call_object.c 78817926a79SDavid Howells */ 789f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 790f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 791dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 79217926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 79317926a79SDavid Howells 7942341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 795a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7962341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 79719ffa01cSDavid Howells struct rxrpc_conn_parameters *, 798999b69f8SDavid Howells struct sockaddr_rxrpc *, 799a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 800a25e21f0SDavid Howells unsigned int); 801248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 80242886ffeSDavid Howells struct sk_buff *); 8038d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 804c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 8058d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 8068d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 807e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 808fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 809fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 81000e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 8112baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 81217926a79SDavid Howells 813dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 814dabe5a79SDavid Howells { 815dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 816dabe5a79SDavid Howells } 817dabe5a79SDavid Howells 818dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 819dabe5a79SDavid Howells { 820dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 821dabe5a79SDavid Howells } 822dabe5a79SDavid Howells 82317926a79SDavid Howells /* 8244a3388c8SDavid Howells * conn_client.c 8254a3388c8SDavid Howells */ 82645025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 827a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 828a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8294a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8304a3388c8SDavid Howells 831eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 832245500d8SDavid Howells struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 833245500d8SDavid Howells void rxrpc_put_bundle(struct rxrpc_bundle *); 8345e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 8355e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 8365e33a23bSDavid Howells gfp_t); 83745025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 838245500d8SDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 83945025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 8402baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 8412baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 842d12040b6SDavid Howells void rxrpc_clean_up_local_conns(struct rxrpc_local *); 8434a3388c8SDavid Howells 8444a3388c8SDavid Howells /* 8450d81a51aSDavid Howells * conn_event.c 8460d81a51aSDavid Howells */ 8470d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 848ddc7834aSDavid Howells void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 8490d81a51aSDavid Howells 8500d81a51aSDavid Howells /* 8510d81a51aSDavid Howells * conn_object.c 85217926a79SDavid Howells */ 853dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 854f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 85517926a79SDavid Howells 856c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 8578496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 8580099dc58SDavid Howells struct sk_buff *, 8590099dc58SDavid Howells struct rxrpc_peer **); 86045025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 861999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 86245025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 863363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 864363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 865245500d8SDavid Howells struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 866363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 867363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 8682baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 8692baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 87017926a79SDavid Howells 87119ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 87219ffa01cSDavid Howells { 87319ffa01cSDavid Howells return conn->out_clientflag; 87419ffa01cSDavid Howells } 87519ffa01cSDavid Howells 87619ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 87719ffa01cSDavid Howells { 878e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 87919ffa01cSDavid Howells } 88019ffa01cSDavid Howells 881f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 882f51b4480SDavid Howells { 88345025bceSDavid Howells if (!conn) 88445025bceSDavid Howells return; 88545025bceSDavid Howells 886363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 88745025bceSDavid Howells rxrpc_put_client_conn(conn); 888363deeabSDavid Howells else 889363deeabSDavid Howells rxrpc_put_service_conn(conn); 8905acbee46SDavid Howells } 8915acbee46SDavid Howells 8923136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 8933136ef49SDavid Howells unsigned long expire_at) 8943136ef49SDavid Howells { 8953136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 8963136ef49SDavid Howells } 8973136ef49SDavid Howells 89817926a79SDavid Howells /* 8997877a4a4SDavid Howells * conn_service.c 9007877a4a4SDavid Howells */ 9018496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9028496af50SDavid Howells struct sk_buff *); 9032baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 904063c60d3SDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 905ec832bd0SDavid Howells const struct rxrpc_security *, struct sk_buff *); 906001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9077877a4a4SDavid Howells 9087877a4a4SDavid Howells /* 9090d81a51aSDavid Howells * input.c 91017926a79SDavid Howells */ 9115271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 91217926a79SDavid Howells 91317926a79SDavid Howells /* 9140d81a51aSDavid Howells * insecure.c 91517926a79SDavid Howells */ 9160d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 91717926a79SDavid Howells 91817926a79SDavid Howells /* 9190d81a51aSDavid Howells * key.c 92017926a79SDavid Howells */ 92117926a79SDavid Howells extern struct key_type key_type_rxrpc; 92217926a79SDavid Howells 923a7b75c5aSChristoph Hellwig int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 92410674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 925c1b1203dSJoe Perches u32); 92617926a79SDavid Howells 92717926a79SDavid Howells /* 92887563616SDavid Howells * local_event.c 92987563616SDavid Howells */ 9304f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 93187563616SDavid Howells 93287563616SDavid Howells /* 9330d81a51aSDavid Howells * local_object.c 93417926a79SDavid Howells */ 9352baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 93609d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 93709d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 93809d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 939730c5fd4SDavid Howells struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 940730c5fd4SDavid Howells void rxrpc_unuse_local(struct rxrpc_local *); 94109d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 9422baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 943e0e4d82fSDavid Howells 94404d36d74SDavid Howells static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 94504d36d74SDavid Howells { 94604d36d74SDavid Howells return atomic_dec_return(&local->active_users) == 0; 94704d36d74SDavid Howells } 94804d36d74SDavid Howells 94904d36d74SDavid Howells static inline bool __rxrpc_use_local(struct rxrpc_local *local) 95004d36d74SDavid Howells { 95104d36d74SDavid Howells return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 95204d36d74SDavid Howells } 95304d36d74SDavid Howells 954e0e4d82fSDavid Howells /* 9558e688d9cSDavid Howells * misc.c 9568e688d9cSDavid Howells */ 9570e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 958a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 959a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 960a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 9618e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 9628e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 9638e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 9648e688d9cSDavid Howells 9658e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 9668e688d9cSDavid Howells 9678e688d9cSDavid Howells /* 9682baec2c3SDavid Howells * net_ns.c 9692baec2c3SDavid Howells */ 9702baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 9712baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 9722baec2c3SDavid Howells 9732baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 9742baec2c3SDavid Howells { 9752baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 9762baec2c3SDavid Howells } 9772baec2c3SDavid Howells 9782baec2c3SDavid Howells /* 9790d81a51aSDavid Howells * output.c 9800d81a51aSDavid Howells */ 981bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 98226cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 983a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 984248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 985ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 9860d81a51aSDavid Howells 9870d81a51aSDavid Howells /* 988abe89ef0SDavid Howells * peer_event.c 9890d81a51aSDavid Howells */ 990abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 991ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 9920d81a51aSDavid Howells 9930d81a51aSDavid Howells /* 9940d81a51aSDavid Howells * peer_object.c 9950d81a51aSDavid Howells */ 996be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 997be6e6707SDavid Howells const struct sockaddr_rxrpc *); 9985e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 999be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1000be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10015e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 10025e33a23bSDavid Howells struct rxrpc_peer *); 100317226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10041159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10051159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10061159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 100760034d3dSDavid Howells void rxrpc_put_peer_locked(struct rxrpc_peer *); 10080d81a51aSDavid Howells 10090d81a51aSDavid Howells /* 10100d81a51aSDavid Howells * proc.c 10110d81a51aSDavid Howells */ 1012c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1013c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 1014bc0e7cf4SDavid Howells extern const struct seq_operations rxrpc_peer_seq_ops; 10150d81a51aSDavid Howells 10160d81a51aSDavid Howells /* 10170d81a51aSDavid Howells * recvmsg.c 10180d81a51aSDavid Howells */ 1019248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10203067bf8cSDavid Howells bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10213067bf8cSDavid Howells bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10223067bf8cSDavid Howells bool __rxrpc_call_completed(struct rxrpc_call *); 10233067bf8cSDavid Howells bool rxrpc_call_completed(struct rxrpc_call *); 10243067bf8cSDavid Howells bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10253067bf8cSDavid Howells bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10260d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10270d81a51aSDavid Howells 10280d81a51aSDavid Howells /* 10293067bf8cSDavid Howells * Abort a call due to a protocol error. 10303067bf8cSDavid Howells */ 10313067bf8cSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 10323067bf8cSDavid Howells struct sk_buff *skb, 10333067bf8cSDavid Howells const char *eproto_why, 10343067bf8cSDavid Howells const char *why, 10353067bf8cSDavid Howells u32 abort_code) 10363067bf8cSDavid Howells { 10373067bf8cSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 10383067bf8cSDavid Howells 10393067bf8cSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 10403067bf8cSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 10413067bf8cSDavid Howells } 10423067bf8cSDavid Howells 10433067bf8cSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 10443067bf8cSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 10453067bf8cSDavid Howells (abort_why), (abort_code)) 10463067bf8cSDavid Howells 10473067bf8cSDavid Howells /* 1048c410bf01SDavid Howells * rtt.c 1049c410bf01SDavid Howells */ 10504700c4d8SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1051c410bf01SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1052c410bf01SDavid Howells unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1053c410bf01SDavid Howells void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1054c410bf01SDavid Howells 1055c410bf01SDavid Howells /* 1056648af7fcSDavid Howells * rxkad.c 1057648af7fcSDavid Howells */ 1058648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1059648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1060648af7fcSDavid Howells #endif 1061648af7fcSDavid Howells 1062648af7fcSDavid Howells /* 10630d81a51aSDavid Howells * security.c 10640d81a51aSDavid Howells */ 10650d81a51aSDavid Howells int __init rxrpc_init_security(void); 106612da59fcSDavid Howells const struct rxrpc_security *rxrpc_security_lookup(u8); 10670d81a51aSDavid Howells void rxrpc_exit_security(void); 10680d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1069ec832bd0SDavid Howells const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1070063c60d3SDavid Howells struct sk_buff *); 1071ec832bd0SDavid Howells struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1072ec832bd0SDavid Howells struct sk_buff *, u32, u32); 10730d81a51aSDavid Howells 10740d81a51aSDavid Howells /* 10750b58b8a1SDavid Howells * sendmsg.c 10760b58b8a1SDavid Howells */ 10770b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 10780b58b8a1SDavid Howells 10790b58b8a1SDavid Howells /* 1080ca7fb100SDavid Howells * server_key.c 1081ca7fb100SDavid Howells */ 1082ca7fb100SDavid Howells extern struct key_type key_type_rxrpc_s; 1083ca7fb100SDavid Howells 1084ca7fb100SDavid Howells int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1085ca7fb100SDavid Howells 1086ca7fb100SDavid Howells /* 10870d81a51aSDavid Howells * skbuff.c 10880d81a51aSDavid Howells */ 1089d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 10900d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 109171f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 109271f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1093d0d5c0cdSDavid Howells void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 109471f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 109571f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1096df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 10970d81a51aSDavid Howells 10980d81a51aSDavid Howells /* 10995873c083SDavid Howells * sysctl.c 11005873c083SDavid Howells */ 11015873c083SDavid Howells #ifdef CONFIG_SYSCTL 11025873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11035873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11045873c083SDavid Howells #else 11055873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11065873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11075873c083SDavid Howells #endif 11085873c083SDavid Howells 11095873c083SDavid Howells /* 1110be6e6707SDavid Howells * utils.c 1111be6e6707SDavid Howells */ 11125a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1113be6e6707SDavid Howells 1114248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1115248f219cSDavid Howells { 1116248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1117248f219cSDavid Howells } 1118248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1119248f219cSDavid Howells { 1120248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1121248f219cSDavid Howells } 1122248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1123248f219cSDavid Howells { 1124248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1125248f219cSDavid Howells } 1126248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1127248f219cSDavid Howells { 1128248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1129248f219cSDavid Howells } 1130248f219cSDavid Howells 1131be6e6707SDavid Howells /* 113217926a79SDavid Howells * debug tracing 113317926a79SDavid Howells */ 113495c96174SEric Dumazet extern unsigned int rxrpc_debug; 113517926a79SDavid Howells 113617926a79SDavid Howells #define dbgprintk(FMT,...) \ 11379f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 113817926a79SDavid Howells 11390dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11400dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 114117926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 114217926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 114317926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 114417926a79SDavid Howells 114517926a79SDavid Howells 114617926a79SDavid Howells #if defined(__KDEBUG) 114717926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 114817926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 114917926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 115017926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 115117926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 115217926a79SDavid Howells 115317926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 115417926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 115517926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 115617926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 115717926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 115817926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 115917926a79SDavid Howells 116017926a79SDavid Howells #define _enter(FMT,...) \ 116117926a79SDavid Howells do { \ 116217926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 116317926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 116417926a79SDavid Howells } while (0) 116517926a79SDavid Howells 116617926a79SDavid Howells #define _leave(FMT,...) \ 116717926a79SDavid Howells do { \ 116817926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 116917926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 117017926a79SDavid Howells } while (0) 117117926a79SDavid Howells 117217926a79SDavid Howells #define _debug(FMT,...) \ 117317926a79SDavid Howells do { \ 117417926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 117517926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 117617926a79SDavid Howells } while (0) 117717926a79SDavid Howells 117817926a79SDavid Howells #define _proto(FMT,...) \ 117917926a79SDavid Howells do { \ 118017926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 118117926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 118217926a79SDavid Howells } while (0) 118317926a79SDavid Howells 118417926a79SDavid Howells #define _net(FMT,...) \ 118517926a79SDavid Howells do { \ 118617926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 118717926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 118817926a79SDavid Howells } while (0) 118917926a79SDavid Howells 119017926a79SDavid Howells #else 119112fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 119212fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 119312fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 119412fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 119512fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 119617926a79SDavid Howells #endif 119717926a79SDavid Howells 119817926a79SDavid Howells /* 119917926a79SDavid Howells * debug assertion checking 120017926a79SDavid Howells */ 120117926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 120217926a79SDavid Howells 120317926a79SDavid Howells #define ASSERT(X) \ 120417926a79SDavid Howells do { \ 120517926a79SDavid Howells if (unlikely(!(X))) { \ 12069b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 120717926a79SDavid Howells BUG(); \ 120817926a79SDavid Howells } \ 120917926a79SDavid Howells } while (0) 121017926a79SDavid Howells 121117926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 121217926a79SDavid Howells do { \ 1213cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1214cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12159b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12169b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1217cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1218cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 121917926a79SDavid Howells BUG(); \ 122017926a79SDavid Howells } \ 122117926a79SDavid Howells } while (0) 122217926a79SDavid Howells 122317926a79SDavid Howells #define ASSERTIF(C, X) \ 122417926a79SDavid Howells do { \ 122517926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12269b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 122717926a79SDavid Howells BUG(); \ 122817926a79SDavid Howells } \ 122917926a79SDavid Howells } while (0) 123017926a79SDavid Howells 123117926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 123217926a79SDavid Howells do { \ 1233cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1234cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12359b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12369b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1237cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1238cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 123917926a79SDavid Howells BUG(); \ 124017926a79SDavid Howells } \ 124117926a79SDavid Howells } while (0) 124217926a79SDavid Howells 124317926a79SDavid Howells #else 124417926a79SDavid Howells 124517926a79SDavid Howells #define ASSERT(X) \ 124617926a79SDavid Howells do { \ 124717926a79SDavid Howells } while (0) 124817926a79SDavid Howells 124917926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 125017926a79SDavid Howells do { \ 125117926a79SDavid Howells } while (0) 125217926a79SDavid Howells 125317926a79SDavid Howells #define ASSERTIF(C, X) \ 125417926a79SDavid Howells do { \ 125517926a79SDavid Howells } while (0) 125617926a79SDavid Howells 125717926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 125817926a79SDavid Howells do { \ 125917926a79SDavid Howells } while (0) 126017926a79SDavid Howells 126117926a79SDavid Howells #endif /* __KDEBUGALL */ 1262