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; 3202a19356SDavid Howells struct rxrpc_txbuf; 33cc8feb8eSDavid Howells 3417926a79SDavid Howells /* 35ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 36ece64fecSDavid Howells * to pass supplementary information. 37d001648eSDavid Howells */ 38d001648eSDavid Howells enum rxrpc_skb_mark { 39ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 40ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 41d001648eSDavid Howells }; 42d001648eSDavid Howells 43d001648eSDavid Howells /* 4417926a79SDavid Howells * sk_state for RxRPC sockets 4517926a79SDavid Howells */ 4617926a79SDavid Howells enum { 472341e077SDavid Howells RXRPC_UNBOUND = 0, 482341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 4917926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 5017926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5128036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 5217926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 53210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 5417926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 5517926a79SDavid Howells }; 5617926a79SDavid Howells 5717926a79SDavid Howells /* 582baec2c3SDavid Howells * Per-network namespace data. 592baec2c3SDavid Howells */ 602baec2c3SDavid Howells struct rxrpc_net { 612baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 622baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 632baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 64ad25f5cbSDavid Howells spinlock_t call_lock; /* Lock for ->calls */ 65d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 662baec2c3SDavid Howells 6731f5f9a1SDavid Howells atomic_t nr_conns; 682baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 692baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 702baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 713d18cbb7SDavid Howells struct work_struct service_conn_reaper; 723d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 732baec2c3SDavid Howells 74f859ab61SDavid Howells bool live; 75245500d8SDavid Howells 76245500d8SDavid Howells bool kill_all_client_conns; 77245500d8SDavid Howells atomic_t nr_client_conns; 782baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 792baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 802baec2c3SDavid Howells struct list_head idle_client_conns; 813d18cbb7SDavid Howells struct work_struct client_conn_reaper; 823d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 832baec2c3SDavid Howells 8433912c26SDavid Howells struct hlist_head local_endpoints; 852baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 862baec2c3SDavid Howells 872baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 88ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 89ace45becSDavid Howells 90ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 91ace45becSDavid Howells u8 peer_keepalive_cursor; 92330bdcfaSDavid Howells time64_t peer_keepalive_base; 93330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 94330bdcfaSDavid Howells struct list_head peer_keepalive_new; 95ace45becSDavid Howells struct timer_list peer_keepalive_timer; 96ace45becSDavid Howells struct work_struct peer_keepalive_work; 97b0154246SDavid Howells 98b0154246SDavid Howells atomic_t stat_tx_data; 99b0154246SDavid Howells atomic_t stat_tx_data_retrans; 100b0154246SDavid Howells atomic_t stat_tx_data_send; 101b0154246SDavid Howells atomic_t stat_tx_data_send_frag; 102b0154246SDavid Howells atomic_t stat_rx_data; 103b0154246SDavid Howells atomic_t stat_rx_data_reqack; 104b0154246SDavid Howells atomic_t stat_rx_data_jumbo; 105f2a676d1SDavid Howells 106f2a676d1SDavid Howells atomic_t stat_tx_ack_fill; 107f2a676d1SDavid Howells atomic_t stat_tx_ack_send; 108f2a676d1SDavid Howells atomic_t stat_tx_ack_skip; 109f2a676d1SDavid Howells atomic_t stat_tx_acks[256]; 110f2a676d1SDavid Howells atomic_t stat_rx_acks[256]; 111f7fa5242SDavid Howells 112f7fa5242SDavid Howells atomic_t stat_why_req_ack[8]; 1132baec2c3SDavid Howells }; 1142baec2c3SDavid Howells 1152baec2c3SDavid Howells /* 11600e90712SDavid Howells * Service backlog preallocation. 11700e90712SDavid Howells * 11800e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 11900e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 12000e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 12100e90712SDavid Howells * shuffle packets around so much. 12200e90712SDavid Howells */ 12300e90712SDavid Howells struct rxrpc_backlog { 12400e90712SDavid Howells unsigned short peer_backlog_head; 12500e90712SDavid Howells unsigned short peer_backlog_tail; 12600e90712SDavid Howells unsigned short conn_backlog_head; 12700e90712SDavid Howells unsigned short conn_backlog_tail; 12800e90712SDavid Howells unsigned short call_backlog_head; 12900e90712SDavid Howells unsigned short call_backlog_tail; 13000e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 13100e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 13200e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 13300e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 13400e90712SDavid Howells }; 13500e90712SDavid Howells 13600e90712SDavid Howells /* 13717926a79SDavid Howells * RxRPC socket definition 13817926a79SDavid Howells */ 13917926a79SDavid Howells struct rxrpc_sock { 14017926a79SDavid Howells /* WARNING: sk has to be the first member */ 14117926a79SDavid Howells struct sock sk; 142d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 14300e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 14417926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 14500e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 146248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 147248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 148248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 149248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 150248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 15117926a79SDavid Howells struct key *key; /* security for this socket */ 15217926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 15300e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 15417926a79SDavid Howells unsigned long flags; 1552341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 15617926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 15717926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 15817926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 159cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 16028036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1614722974dSDavid Howells struct { 1624722974dSDavid Howells /* Service upgrade information */ 1634722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1644722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1654722974dSDavid Howells } service_upgrade; 166cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1674722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1682341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 16917926a79SDavid Howells }; 17017926a79SDavid Howells 17117926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 17217926a79SDavid Howells 17317926a79SDavid Howells /* 1740d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1750d12f8a4SDavid Howells */ 1760d12f8a4SDavid Howells struct rxrpc_host_header { 1770d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1780d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1790d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1800d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1810d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1820d12f8a4SDavid Howells u8 type; /* packet type */ 1830d12f8a4SDavid Howells u8 flags; /* packet flags */ 1840d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1850d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1860d12f8a4SDavid Howells union { 1870d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1880d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1890d12f8a4SDavid Howells }; 1900d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1910d12f8a4SDavid Howells } __packed; 1920d12f8a4SDavid Howells 1930d12f8a4SDavid Howells /* 19417926a79SDavid Howells * RxRPC socket buffer private variables 19517926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 19617926a79SDavid Howells */ 19717926a79SDavid Howells struct rxrpc_skb_priv { 198987db9f7SDavid Howells atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 199c3c9e3dfSDavid Howells u8 nr_subpackets; /* Number of subpackets */ 200c3c9e3dfSDavid Howells u8 rx_flags; /* Received packet flags */ 201c3c9e3dfSDavid Howells #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 20217926a79SDavid Howells union { 20317926a79SDavid Howells int remain; /* amount of space remaining for next write */ 204c3c9e3dfSDavid Howells 205c3c9e3dfSDavid Howells /* List of requested ACKs on subpackets */ 206c3c9e3dfSDavid Howells unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 207c3c9e3dfSDavid Howells BITS_PER_LONG]; 20817926a79SDavid Howells }; 20917926a79SDavid Howells 2100d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 21117926a79SDavid Howells }; 21217926a79SDavid Howells 21317926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 21417926a79SDavid Howells 21517926a79SDavid Howells /* 21617926a79SDavid Howells * RxRPC security module interface 21717926a79SDavid Howells */ 21817926a79SDavid Howells struct rxrpc_security { 21917926a79SDavid Howells const char *name; /* name of this service */ 22017926a79SDavid Howells u8 security_index; /* security type provided */ 221063c60d3SDavid Howells u32 no_key_abort; /* Abort code indicating no key */ 22217926a79SDavid Howells 223648af7fcSDavid Howells /* Initialise a security service */ 224648af7fcSDavid Howells int (*init)(void); 225648af7fcSDavid Howells 226648af7fcSDavid Howells /* Clean up a security service */ 227648af7fcSDavid Howells void (*exit)(void); 228648af7fcSDavid Howells 22912da59fcSDavid Howells /* Parse the information from a server key */ 23012da59fcSDavid Howells int (*preparse_server_key)(struct key_preparsed_payload *); 23112da59fcSDavid Howells 23212da59fcSDavid Howells /* Clean up the preparse buffer after parsing a server key */ 23312da59fcSDavid Howells void (*free_preparse_server_key)(struct key_preparsed_payload *); 23412da59fcSDavid Howells 23512da59fcSDavid Howells /* Destroy the payload of a server key */ 23612da59fcSDavid Howells void (*destroy_server_key)(struct key *); 23712da59fcSDavid Howells 238d5953f65SDavid Howells /* Describe a server key */ 239d5953f65SDavid Howells void (*describe_server_key)(const struct key *, struct seq_file *); 240d5953f65SDavid Howells 24117926a79SDavid Howells /* initialise a connection's security */ 24241057ebdSDavid Howells int (*init_connection_security)(struct rxrpc_connection *, 24341057ebdSDavid Howells struct rxrpc_key_token *); 24417926a79SDavid Howells 245d7d775b1SDavid Howells /* Work out how much data we can store in a packet, given an estimate 246d7d775b1SDavid Howells * of the amount of data remaining. 247d7d775b1SDavid Howells */ 248d7d775b1SDavid Howells int (*how_much_data)(struct rxrpc_call *, size_t, 249d7d775b1SDavid Howells size_t *, size_t *, size_t *); 25017926a79SDavid Howells 25117926a79SDavid Howells /* impose security on a packet */ 252f4bdf3d6SDavid Howells int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 25317926a79SDavid Howells 25417926a79SDavid Howells /* verify the security on a received packet */ 2555a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 256248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 257248f219cSDavid Howells 2581db88c53SDavid Howells /* Free crypto request on a call */ 2591db88c53SDavid Howells void (*free_call_crypto)(struct rxrpc_call *); 2601db88c53SDavid Howells 261248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 262248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 263248f219cSDavid Howells unsigned int *, unsigned int *); 26417926a79SDavid Howells 26517926a79SDavid Howells /* issue a challenge */ 26617926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 26717926a79SDavid Howells 26817926a79SDavid Howells /* respond to a challenge */ 26917926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 27017926a79SDavid Howells struct sk_buff *, 27117926a79SDavid Howells u32 *); 27217926a79SDavid Howells 27317926a79SDavid Howells /* verify a response */ 27417926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 27517926a79SDavid Howells struct sk_buff *, 27617926a79SDavid Howells u32 *); 27717926a79SDavid Howells 27817926a79SDavid Howells /* clear connection security */ 27917926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 28017926a79SDavid Howells }; 28117926a79SDavid Howells 28217926a79SDavid Howells /* 2834f95dd78SDavid Howells * RxRPC local transport endpoint description 2844f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2854f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 28617926a79SDavid Howells */ 28717926a79SDavid Howells struct rxrpc_local { 2884f95dd78SDavid Howells struct rcu_head rcu; 289730c5fd4SDavid Howells atomic_t active_users; /* Number of users of the local endpoint */ 290a0575429SDavid Howells refcount_t ref; /* Number of references to the structure */ 2912baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 29233912c26SDavid Howells struct hlist_node link; 29317926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2944f95dd78SDavid Howells struct work_struct processor; 29572f0c6fbSDavid Howells struct list_head ack_tx_queue; /* List of ACKs that need sending */ 29672f0c6fbSDavid Howells spinlock_t ack_tx_lock; /* ACK list lock */ 2971e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 29817926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 29917926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 30044ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 301245500d8SDavid Howells struct rb_root client_bundles; /* Client connection bundles by socket params */ 302245500d8SDavid Howells spinlock_t client_bundles_lock; /* Lock for client_bundles */ 30317926a79SDavid Howells spinlock_t lock; /* access lock */ 30417926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 30517926a79SDavid Howells int debug_id; /* debug ID for printks */ 3064f95dd78SDavid Howells bool dead; 307f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 30817926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 30917926a79SDavid Howells }; 31017926a79SDavid Howells 31117926a79SDavid Howells /* 31217926a79SDavid Howells * RxRPC remote transport endpoint definition 313be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 31417926a79SDavid Howells */ 31517926a79SDavid Howells struct rxrpc_peer { 316be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 317a0575429SDavid Howells refcount_t ref; 318be6e6707SDavid Howells unsigned long hash_key; 319be6e6707SDavid Howells struct hlist_node hash_link; 320be6e6707SDavid Howells struct rxrpc_local *local; 321f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 322aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 323330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 324ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 3258496af50SDavid Howells seqlock_t service_conn_lock; 32617926a79SDavid Howells spinlock_t lock; /* access lock */ 32795c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 32895c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 32995c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 33017926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 33117926a79SDavid Howells int debug_id; /* debug ID for printks */ 33217926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 33317926a79SDavid Howells 33417926a79SDavid Howells /* calculated RTT cache */ 33517926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 336c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3370d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 338c410bf01SDavid Howells unsigned int rtt_count; /* Number of samples we've got */ 339c410bf01SDavid Howells 340c410bf01SDavid Howells u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 341c410bf01SDavid Howells u32 mdev_us; /* medium deviation */ 342c410bf01SDavid Howells u32 mdev_max_us; /* maximal mdev for the last rtt period */ 343c410bf01SDavid Howells u32 rttvar_us; /* smoothed mdev_max */ 344c410bf01SDavid Howells u32 rto_j; /* Retransmission timeout in jiffies */ 345c410bf01SDavid Howells u8 backoff; /* Backoff timeout */ 346f7aec129SDavid Howells 347f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 34817926a79SDavid Howells }; 34917926a79SDavid Howells 35017926a79SDavid Howells /* 35119ffa01cSDavid Howells * Keys for matching a connection. 35219ffa01cSDavid Howells */ 35319ffa01cSDavid Howells struct rxrpc_conn_proto { 354e8d70ce1SDavid Howells union { 355e8d70ce1SDavid Howells struct { 35619ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 35719ffa01cSDavid Howells u32 cid; /* connection ID */ 358e8d70ce1SDavid Howells }; 359e8d70ce1SDavid Howells u64 index_key; 36019ffa01cSDavid Howells }; 36119ffa01cSDavid Howells }; 36219ffa01cSDavid Howells 36319ffa01cSDavid Howells struct rxrpc_conn_parameters { 36419ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 36519ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 36619ffa01cSDavid Howells struct key *key; /* Security details */ 36719ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3684e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 36919ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 37019ffa01cSDavid Howells u32 security_level; /* Security level selected */ 37119ffa01cSDavid Howells }; 37219ffa01cSDavid Howells 37319ffa01cSDavid Howells /* 374bba304dbSDavid Howells * Bits in the connection flags. 375bba304dbSDavid Howells */ 376bba304dbSDavid Howells enum rxrpc_conn_flag { 377bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 378001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 37945025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 3804e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3813136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3823136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3833136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3843136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 385bba304dbSDavid Howells }; 386bba304dbSDavid Howells 3873136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3883136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3893136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3903136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3913136ef49SDavid Howells 392bba304dbSDavid Howells /* 393bba304dbSDavid Howells * Events that can be raised upon a connection. 394bba304dbSDavid Howells */ 395bba304dbSDavid Howells enum rxrpc_conn_event { 396bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 397bba304dbSDavid Howells }; 398bba304dbSDavid Howells 399bba304dbSDavid Howells /* 400bba304dbSDavid Howells * The connection protocol state. 401bba304dbSDavid Howells */ 402bba304dbSDavid Howells enum rxrpc_conn_proto_state { 403bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 404bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 40500e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 406bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 407bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 408bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 409bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 410bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 411bba304dbSDavid Howells RXRPC_CONN__NR_STATES 412bba304dbSDavid Howells }; 413bba304dbSDavid Howells 414bba304dbSDavid Howells /* 415245500d8SDavid Howells * RxRPC client connection bundle. 416245500d8SDavid Howells */ 417245500d8SDavid Howells struct rxrpc_bundle { 418245500d8SDavid Howells struct rxrpc_conn_parameters params; 419a0575429SDavid Howells refcount_t ref; 420245500d8SDavid Howells unsigned int debug_id; 421245500d8SDavid Howells bool try_upgrade; /* True if the bundle is attempting upgrade */ 422245500d8SDavid Howells bool alloc_conn; /* True if someone's getting a conn */ 4238806245aSDavid Howells short alloc_error; /* Error from last conn allocation */ 424245500d8SDavid Howells spinlock_t channel_lock; 425245500d8SDavid Howells struct rb_node local_node; /* Node in local->client_conns */ 426245500d8SDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 427245500d8SDavid Howells unsigned long avail_chans; /* Mask of available channels */ 428245500d8SDavid Howells struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 429245500d8SDavid Howells }; 430245500d8SDavid Howells 431245500d8SDavid Howells /* 43217926a79SDavid Howells * RxRPC connection definition 433aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 43417926a79SDavid Howells * - each connection can only handle four simultaneous calls 43517926a79SDavid Howells */ 43617926a79SDavid Howells struct rxrpc_connection { 43719ffa01cSDavid Howells struct rxrpc_conn_proto proto; 43819ffa01cSDavid Howells struct rxrpc_conn_parameters params; 43919ffa01cSDavid Howells 440a0575429SDavid Howells refcount_t ref; 44145025bceSDavid Howells struct rcu_head rcu; 44245025bceSDavid Howells struct list_head cache_link; 443a1399f8bSDavid Howells 444245500d8SDavid Howells unsigned char act_chans; /* Mask of active channels */ 445a1399f8bSDavid Howells struct rxrpc_channel { 4463136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 447a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4484764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 449a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 450a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 451a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 45218bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 45318bfeba5SDavid Howells union { 45418bfeba5SDavid Howells u32 last_seq; 45518bfeba5SDavid Howells u32 last_abort; 45618bfeba5SDavid Howells }; 457a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 458999b69f8SDavid Howells 4593136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 46017926a79SDavid Howells struct work_struct processor; /* connection event processor */ 461245500d8SDavid Howells struct rxrpc_bundle *bundle; /* Client connection bundle */ 462aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 4634d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 46417926a79SDavid Howells struct list_head link; /* link in master connection list */ 46517926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 466521bb304SDavid Howells 467648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 468521bb304SDavid Howells union { 469521bb304SDavid Howells struct { 47069d826faSKees Cook struct crypto_sync_skcipher *cipher; /* encryption handle */ 47117926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 472521bb304SDavid Howells u32 nonce; /* response re-use preventer */ 473521bb304SDavid Howells } rxkad; 474521bb304SDavid Howells }; 4754a3388c8SDavid Howells unsigned long flags; 47617926a79SDavid Howells unsigned long events; 477f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 47817926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 479cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 48064753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 48117926a79SDavid Howells int debug_id; /* debug ID for printks */ 48217926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 483563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 484c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 48517926a79SDavid Howells u8 security_ix; /* security type */ 48617926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 487245500d8SDavid Howells u8 bundle_shift; /* Index into bundle->avail_chans */ 48864753092SDavid Howells short error; /* Local error code */ 48917926a79SDavid Howells }; 49017926a79SDavid Howells 491dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 492dc71db34SDavid Howells { 493dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 494dc71db34SDavid Howells } 495dc71db34SDavid Howells 496dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 497dc71db34SDavid Howells { 498dc71db34SDavid Howells return !rxrpc_to_server(sp); 499dc71db34SDavid Howells } 500dc71db34SDavid Howells 50117926a79SDavid Howells /* 5025b8848d1SDavid Howells * Flags in call->flags. 5035b8848d1SDavid Howells */ 5045b8848d1SDavid Howells enum rxrpc_call_flag { 5055b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 5065b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 507dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 50845025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 509248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 510248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 511a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 51257494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 513c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 5141a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 515d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 5165273a191SDavid Howells RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 517b7a7d674SDavid Howells RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 518245500d8SDavid Howells RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 519*530403d9SDavid Howells RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ 520*530403d9SDavid Howells RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ 5215b8848d1SDavid Howells }; 5225b8848d1SDavid Howells 5235b8848d1SDavid Howells /* 5245b8848d1SDavid Howells * Events that can be raised on a call. 5255b8848d1SDavid Howells */ 5265b8848d1SDavid Howells enum rxrpc_call_event { 5274c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 5284c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 529a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 530bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 5315b8848d1SDavid Howells }; 5325b8848d1SDavid Howells 5335b8848d1SDavid Howells /* 5345b8848d1SDavid Howells * The states that a call can be in. 5355b8848d1SDavid Howells */ 5365b8848d1SDavid Howells enum rxrpc_call_state { 537999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 538999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5395b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5405b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5415b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 54200e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5435b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5445b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5455b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5465b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5475b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 548f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 549f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 550f5c17aaeSDavid Howells }; 551f5c17aaeSDavid Howells 552f5c17aaeSDavid Howells /* 553e122d845SDavid Howells * Call completion condition (state == RXRPC_CALL_COMPLETE). 554e122d845SDavid Howells */ 555e122d845SDavid Howells enum rxrpc_call_completion { 556e122d845SDavid Howells RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 557e122d845SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 558e122d845SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 559e122d845SDavid Howells RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 560e122d845SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 561e122d845SDavid Howells NR__RXRPC_CALL_COMPLETIONS 562e122d845SDavid Howells }; 563e122d845SDavid Howells 564e122d845SDavid Howells /* 56557494343SDavid Howells * Call Tx congestion management modes. 56657494343SDavid Howells */ 56757494343SDavid Howells enum rxrpc_congest_mode { 56857494343SDavid Howells RXRPC_CALL_SLOW_START, 56957494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 57057494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 57157494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 57257494343SDavid Howells NR__RXRPC_CONGEST_MODES 57357494343SDavid Howells }; 57457494343SDavid Howells 57557494343SDavid Howells /* 57617926a79SDavid Howells * RxRPC call definition 57717926a79SDavid Howells * - matched by { connection, call_id } 57817926a79SDavid Howells */ 57917926a79SDavid Howells struct rxrpc_call { 580dee46364SDavid Howells struct rcu_head rcu; 58117926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 582df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5838d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 584d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 58591fcfbe8SDavid Howells const struct rxrpc_security *security; /* applied security module */ 586540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 587*530403d9SDavid Howells unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ 588bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 589a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 590a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 591415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 592a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 593a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 594a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 595a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 596a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 5971db88c53SDavid Howells struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 598248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 599248f219cSDavid Howells struct work_struct processor; /* Event processor */ 600d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 60117926a79SDavid Howells struct list_head link; /* link in master call list */ 602245500d8SDavid Howells struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 603f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 604248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 605248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 606248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 607248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 60817926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 60945025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 610e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 611a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 61217926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 61317926a79SDavid Howells unsigned long flags; 61417926a79SDavid Howells unsigned long events; 61517926a79SDavid Howells spinlock_t lock; 61620acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 61717926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 618f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 619f5c17aaeSDavid Howells int error; /* Local error incurred */ 620cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 621cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 622a0575429SDavid Howells refcount_t ref; 623dabe5a79SDavid Howells u16 service_id; /* service ID */ 624278ac0cdSDavid Howells u8 security_ix; /* Security type */ 625e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 626dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 627dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 628dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 6298e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 6308e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 631f9c32435SDavid Howells bool rx_pkt_last; /* Current recvmsg packet is last */ 63217926a79SDavid Howells 633248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 634248f219cSDavid Howells * 635248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 636248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 637248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 638248f219cSDavid Howells * 639248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 640248f219cSDavid Howells * acked. 64117926a79SDavid Howells */ 642248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 643248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 6444075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 645248f219cSDavid Howells struct sk_buff **rxtx_buffer; 646248f219cSDavid Howells u8 *rxtx_annotations; 647248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 648248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 649248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 650248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 651f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 65270790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 65370790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 65470790dbeSDavid Howells 655e2de6c40SDavid Howells #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 656248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 657248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 658248f219cSDavid Howells * not hard-ACK'd packet follows this. 659248f219cSDavid Howells */ 660248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 661c7e86acfSDavid Howells u16 tx_backoff; /* Delay to insert due to Tx failure */ 66257494343SDavid Howells 66357494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 66457494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 66557494343SDavid Howells * packets) rather than bytes. 66657494343SDavid Howells */ 66757494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 66857494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 66957494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 67057494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 67157494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 67257494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 67357494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 67457494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 67557494343SDavid Howells 676248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 677248f219cSDavid Howells * consumed packet follows this. 678248f219cSDavid Howells */ 679248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 680248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6811a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 682248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 683248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 68475e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 68517926a79SDavid Howells 686c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 687c1e15b49SDavid Howells 6888940ba3cSDavid Howells /* Receive-phase ACK management (ACKs we send). */ 6894e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 6900d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 69181524b63SDavid Howells rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */ 6929a3dedcfSDavid Howells atomic_t ackr_nr_unacked; /* Number of unacked packets */ 6939a3dedcfSDavid Howells atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 694a5af7e1fSDavid Howells 6954700c4d8SDavid Howells /* RTT management */ 6964700c4d8SDavid Howells rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 6974700c4d8SDavid Howells ktime_t rtt_sent_at[4]; /* Time packet sent */ 6984700c4d8SDavid Howells unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 6994700c4d8SDavid Howells * Mask of pending samples in 8-11 */ 7004700c4d8SDavid Howells #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 7014700c4d8SDavid Howells #define RXRPC_CALL_RTT_PEND_SHIFT 8 70217926a79SDavid Howells 7038940ba3cSDavid Howells /* Transmission-phase ACK management (ACKs we've received). */ 70457494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 7058940ba3cSDavid Howells rxrpc_seq_t acks_first_seq; /* first sequence number received */ 70681524b63SDavid Howells rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 70731a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 708bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 709bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 710589a0c1eSDavid Howells rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 71131a1b989SDavid Howells }; 71231a1b989SDavid Howells 71331a1b989SDavid Howells /* 71457494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 71531a1b989SDavid Howells */ 71631a1b989SDavid Howells struct rxrpc_ack_summary { 71731a1b989SDavid Howells u8 ack_reason; 71831a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 71931a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 72031a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 72131a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 72231a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 72331a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 72457494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 72557494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 72657494343SDavid Howells /* Place to stash values for tracing */ 72757494343SDavid Howells enum rxrpc_congest_mode mode:8; 72857494343SDavid Howells u8 cwnd; 72957494343SDavid Howells u8 ssthresh; 73057494343SDavid Howells u8 dup_acks; 73157494343SDavid Howells u8 cumulative_acks; 73217926a79SDavid Howells }; 73317926a79SDavid Howells 73448124178SDavid Howells /* 73548124178SDavid Howells * sendmsg() cmsg-specified parameters. 73648124178SDavid Howells */ 73748124178SDavid Howells enum rxrpc_command { 73848124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 73948124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 74048124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 7412d914c1bSDavid Howells RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 74248124178SDavid Howells }; 74348124178SDavid Howells 74448124178SDavid Howells struct rxrpc_call_params { 74548124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 74648124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 74748124178SDavid Howells struct { 74848124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 74948124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 75048124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 75148124178SDavid Howells } timeouts; 75248124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 753b7a7d674SDavid Howells bool kernel; /* T if kernel is making the call */ 754e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 75548124178SDavid Howells }; 75648124178SDavid Howells 75748124178SDavid Howells struct rxrpc_send_params { 75848124178SDavid Howells struct rxrpc_call_params call; 75948124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 76048124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 76148124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 76248124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 76348124178SDavid Howells }; 76448124178SDavid Howells 76502a19356SDavid Howells /* 76602a19356SDavid Howells * Buffer of data to be output as a packet. 76702a19356SDavid Howells */ 76802a19356SDavid Howells struct rxrpc_txbuf { 76902a19356SDavid Howells struct rcu_head rcu; 77002a19356SDavid Howells struct list_head call_link; /* Link in call->tx_queue */ 77102a19356SDavid Howells struct list_head tx_link; /* Link in live Enc queue or Tx queue */ 77202a19356SDavid Howells struct rxrpc_call *call; /* Call to which belongs */ 77302a19356SDavid Howells ktime_t last_sent; /* Time at which last transmitted */ 77402a19356SDavid Howells refcount_t ref; 77502a19356SDavid Howells rxrpc_seq_t seq; /* Sequence number of this packet */ 77602a19356SDavid Howells unsigned int call_debug_id; 77702a19356SDavid Howells unsigned int debug_id; 77802a19356SDavid Howells unsigned int len; /* Amount of data in buffer */ 77902a19356SDavid Howells unsigned int space; /* Remaining data space */ 78002a19356SDavid Howells unsigned int offset; /* Offset of fill point */ 78102a19356SDavid Howells unsigned long flags; 78202a19356SDavid Howells #define RXRPC_TXBUF_ACKED 0 /* Set if ACK'd */ 78302a19356SDavid Howells #define RXRPC_TXBUF_NACKED 1 /* Set if NAK'd */ 78402a19356SDavid Howells #define RXRPC_TXBUF_LAST 2 /* Set if last packet in Tx phase */ 78502a19356SDavid Howells #define RXRPC_TXBUF_RESENT 3 /* Set if has been resent */ 78602a19356SDavid Howells #define RXRPC_TXBUF_RETRANS 4 /* Set if should be retransmitted */ 78772f0c6fbSDavid Howells u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */ 78802a19356SDavid Howells struct { 78902a19356SDavid Howells /* The packet for encrypting and DMA'ing. We align it such 79002a19356SDavid Howells * that data[] aligns correctly for any crypto blocksize. 79102a19356SDavid Howells */ 79202a19356SDavid Howells u8 pad[64 - sizeof(struct rxrpc_wire_header)]; 79302a19356SDavid Howells struct rxrpc_wire_header wire; /* Network-ready header */ 79472f0c6fbSDavid Howells union { 79502a19356SDavid Howells u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */ 79672f0c6fbSDavid Howells struct { 79772f0c6fbSDavid Howells struct rxrpc_ackpacket ack; 79872f0c6fbSDavid Howells u8 acks[0]; 79972f0c6fbSDavid Howells }; 80072f0c6fbSDavid Howells }; 80102a19356SDavid Howells } __aligned(64); 80202a19356SDavid Howells }; 80302a19356SDavid Howells 80402a19356SDavid Howells static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb) 80502a19356SDavid Howells { 80602a19356SDavid Howells return txb->wire.flags & RXRPC_CLIENT_INITIATED; 80702a19356SDavid Howells } 80802a19356SDavid Howells 80902a19356SDavid Howells static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb) 81002a19356SDavid Howells { 81102a19356SDavid Howells return !rxrpc_sending_to_server(txb); 81202a19356SDavid Howells } 81302a19356SDavid Howells 814df844fd4SDavid Howells #include <trace/events/rxrpc.h> 815df844fd4SDavid Howells 81617926a79SDavid Howells /* 817651350d1SDavid Howells * af_rxrpc.c 81817926a79SDavid Howells */ 81971f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 820651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 82117926a79SDavid Howells 82217926a79SDavid Howells /* 8230d81a51aSDavid Howells * call_accept.c 82417926a79SDavid Howells */ 82500e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 82600e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 827248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 8280099dc58SDavid Howells struct rxrpc_sock *, 829248f219cSDavid Howells struct sk_buff *); 8304f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 8312d914c1bSDavid Howells int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 83217926a79SDavid Howells 83317926a79SDavid Howells /* 8340d81a51aSDavid Howells * call_event.c 83517926a79SDavid Howells */ 83672f0c6fbSDavid Howells void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, 83772f0c6fbSDavid Howells enum rxrpc_propose_ack_trace why); 83872f0c6fbSDavid Howells void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); 839*530403d9SDavid Howells void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, 840*530403d9SDavid Howells enum rxrpc_propose_ack_trace); 841c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 84217926a79SDavid Howells 8434a7f62f9SDavid Howells void rxrpc_reduce_call_timer(struct rxrpc_call *call, 844a158bdd3SDavid Howells unsigned long expire_at, 845a158bdd3SDavid Howells unsigned long now, 8464a7f62f9SDavid Howells enum rxrpc_timer_trace why); 8474a7f62f9SDavid Howells 8484a7f62f9SDavid Howells void rxrpc_delete_call_timer(struct rxrpc_call *call); 849a158bdd3SDavid Howells 85017926a79SDavid Howells /* 8510d81a51aSDavid Howells * call_object.c 85217926a79SDavid Howells */ 853f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 854f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 85517926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 85617926a79SDavid Howells 8572341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 858a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 8592341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 86019ffa01cSDavid Howells struct rxrpc_conn_parameters *, 861999b69f8SDavid Howells struct sockaddr_rxrpc *, 862a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 863a25e21f0SDavid Howells unsigned int); 864248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 86542886ffeSDavid Howells struct sk_buff *); 8668d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 867c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 8688d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 8698d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 870e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 8714a7f62f9SDavid Howells bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 872fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 873fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 87400e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 8752baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 87617926a79SDavid Howells 877dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 878dabe5a79SDavid Howells { 879dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 880dabe5a79SDavid Howells } 881dabe5a79SDavid Howells 882dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 883dabe5a79SDavid Howells { 884dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 885dabe5a79SDavid Howells } 886dabe5a79SDavid Howells 88717926a79SDavid Howells /* 8884a3388c8SDavid Howells * conn_client.c 8894a3388c8SDavid Howells */ 89045025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 891a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 892a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8934a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8944a3388c8SDavid Howells 895eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 896245500d8SDavid Howells struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 897245500d8SDavid Howells void rxrpc_put_bundle(struct rxrpc_bundle *); 8985e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 8995e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 9005e33a23bSDavid Howells gfp_t); 90145025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 902245500d8SDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 90345025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 9042baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 9052baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 906d12040b6SDavid Howells void rxrpc_clean_up_local_conns(struct rxrpc_local *); 9074a3388c8SDavid Howells 9084a3388c8SDavid Howells /* 9090d81a51aSDavid Howells * conn_event.c 9100d81a51aSDavid Howells */ 9110d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 912ddc7834aSDavid Howells void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 9130d81a51aSDavid Howells 9140d81a51aSDavid Howells /* 9150d81a51aSDavid Howells * conn_object.c 91617926a79SDavid Howells */ 917dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 918f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 91917926a79SDavid Howells 920c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 9218496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 9220099dc58SDavid Howells struct sk_buff *, 9230099dc58SDavid Howells struct rxrpc_peer **); 92445025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 925999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 92645025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 927363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 928363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 929245500d8SDavid Howells struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 930363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 931363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 9322baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 9332baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 93417926a79SDavid Howells 93519ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 93619ffa01cSDavid Howells { 93719ffa01cSDavid Howells return conn->out_clientflag; 93819ffa01cSDavid Howells } 93919ffa01cSDavid Howells 94019ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 94119ffa01cSDavid Howells { 942e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 94319ffa01cSDavid Howells } 94419ffa01cSDavid Howells 945f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 946f51b4480SDavid Howells { 94745025bceSDavid Howells if (!conn) 94845025bceSDavid Howells return; 94945025bceSDavid Howells 950363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 95145025bceSDavid Howells rxrpc_put_client_conn(conn); 952363deeabSDavid Howells else 953363deeabSDavid Howells rxrpc_put_service_conn(conn); 9545acbee46SDavid Howells } 9555acbee46SDavid Howells 9563136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9573136ef49SDavid Howells unsigned long expire_at) 9583136ef49SDavid Howells { 9593136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9603136ef49SDavid Howells } 9613136ef49SDavid Howells 96217926a79SDavid Howells /* 9637877a4a4SDavid Howells * conn_service.c 9647877a4a4SDavid Howells */ 9658496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9668496af50SDavid Howells struct sk_buff *); 9672baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 968063c60d3SDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 969ec832bd0SDavid Howells const struct rxrpc_security *, struct sk_buff *); 970001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9717877a4a4SDavid Howells 9727877a4a4SDavid Howells /* 9730d81a51aSDavid Howells * input.c 97417926a79SDavid Howells */ 9755271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 97617926a79SDavid Howells 97717926a79SDavid Howells /* 9780d81a51aSDavid Howells * insecure.c 97917926a79SDavid Howells */ 9800d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 98117926a79SDavid Howells 98217926a79SDavid Howells /* 9830d81a51aSDavid Howells * key.c 98417926a79SDavid Howells */ 98517926a79SDavid Howells extern struct key_type key_type_rxrpc; 98617926a79SDavid Howells 987a7b75c5aSChristoph Hellwig int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 98810674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 989c1b1203dSJoe Perches u32); 99017926a79SDavid Howells 99117926a79SDavid Howells /* 99287563616SDavid Howells * local_event.c 99387563616SDavid Howells */ 9944f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 99587563616SDavid Howells 99687563616SDavid Howells /* 9970d81a51aSDavid Howells * local_object.c 99817926a79SDavid Howells */ 9992baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 100009d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 100109d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 100209d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 1003730c5fd4SDavid Howells struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 1004730c5fd4SDavid Howells void rxrpc_unuse_local(struct rxrpc_local *); 100509d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 10062baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 1007e0e4d82fSDavid Howells 100804d36d74SDavid Howells static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 100904d36d74SDavid Howells { 101004d36d74SDavid Howells return atomic_dec_return(&local->active_users) == 0; 101104d36d74SDavid Howells } 101204d36d74SDavid Howells 101304d36d74SDavid Howells static inline bool __rxrpc_use_local(struct rxrpc_local *local) 101404d36d74SDavid Howells { 101504d36d74SDavid Howells return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 101604d36d74SDavid Howells } 101704d36d74SDavid Howells 1018e0e4d82fSDavid Howells /* 10198e688d9cSDavid Howells * misc.c 10208e688d9cSDavid Howells */ 10210e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 1022a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 1023a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 10248e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 10258e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 10268e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 10278e688d9cSDavid Howells 10288e688d9cSDavid Howells /* 10292baec2c3SDavid Howells * net_ns.c 10302baec2c3SDavid Howells */ 10312baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 10322baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 10332baec2c3SDavid Howells 10342baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 10352baec2c3SDavid Howells { 10362baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 10372baec2c3SDavid Howells } 10382baec2c3SDavid Howells 10392baec2c3SDavid Howells /* 10400d81a51aSDavid Howells * output.c 10410d81a51aSDavid Howells */ 104272f0c6fbSDavid Howells void rxrpc_transmit_ack_packets(struct rxrpc_local *); 104326cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 1044a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1045248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 1046ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 10470d81a51aSDavid Howells 10480d81a51aSDavid Howells /* 1049abe89ef0SDavid Howells * peer_event.c 10500d81a51aSDavid Howells */ 1051abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1052ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10530d81a51aSDavid Howells 10540d81a51aSDavid Howells /* 10550d81a51aSDavid Howells * peer_object.c 10560d81a51aSDavid Howells */ 1057be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1058be6e6707SDavid Howells const struct sockaddr_rxrpc *); 10595e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1060be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1061be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10625e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 10635e33a23bSDavid Howells struct rxrpc_peer *); 106417226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10651159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10661159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10671159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 106860034d3dSDavid Howells void rxrpc_put_peer_locked(struct rxrpc_peer *); 10690d81a51aSDavid Howells 10700d81a51aSDavid Howells /* 10710d81a51aSDavid Howells * proc.c 10720d81a51aSDavid Howells */ 1073c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1074c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 1075bc0e7cf4SDavid Howells extern const struct seq_operations rxrpc_peer_seq_ops; 107633912c26SDavid Howells extern const struct seq_operations rxrpc_local_seq_ops; 10770d81a51aSDavid Howells 10780d81a51aSDavid Howells /* 10790d81a51aSDavid Howells * recvmsg.c 10800d81a51aSDavid Howells */ 1081248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10823067bf8cSDavid Howells bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10833067bf8cSDavid Howells bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10843067bf8cSDavid Howells bool __rxrpc_call_completed(struct rxrpc_call *); 10853067bf8cSDavid Howells bool rxrpc_call_completed(struct rxrpc_call *); 10863067bf8cSDavid Howells bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10873067bf8cSDavid Howells bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10880d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10890d81a51aSDavid Howells 10900d81a51aSDavid Howells /* 10913067bf8cSDavid Howells * Abort a call due to a protocol error. 10923067bf8cSDavid Howells */ 10933067bf8cSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 10943067bf8cSDavid Howells struct sk_buff *skb, 10953067bf8cSDavid Howells const char *eproto_why, 10963067bf8cSDavid Howells const char *why, 10973067bf8cSDavid Howells u32 abort_code) 10983067bf8cSDavid Howells { 10993067bf8cSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 11003067bf8cSDavid Howells 11013067bf8cSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 11023067bf8cSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 11033067bf8cSDavid Howells } 11043067bf8cSDavid Howells 11053067bf8cSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 11063067bf8cSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 11073067bf8cSDavid Howells (abort_why), (abort_code)) 11083067bf8cSDavid Howells 11093067bf8cSDavid Howells /* 1110c410bf01SDavid Howells * rtt.c 1111c410bf01SDavid Howells */ 11124700c4d8SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1113c410bf01SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1114c410bf01SDavid Howells unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1115c410bf01SDavid Howells void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1116c410bf01SDavid Howells 1117c410bf01SDavid Howells /* 1118648af7fcSDavid Howells * rxkad.c 1119648af7fcSDavid Howells */ 1120648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1121648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1122648af7fcSDavid Howells #endif 1123648af7fcSDavid Howells 1124648af7fcSDavid Howells /* 11250d81a51aSDavid Howells * security.c 11260d81a51aSDavid Howells */ 11270d81a51aSDavid Howells int __init rxrpc_init_security(void); 112812da59fcSDavid Howells const struct rxrpc_security *rxrpc_security_lookup(u8); 11290d81a51aSDavid Howells void rxrpc_exit_security(void); 11300d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1131ec832bd0SDavid Howells const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1132063c60d3SDavid Howells struct sk_buff *); 1133ec832bd0SDavid Howells struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1134ec832bd0SDavid Howells struct sk_buff *, u32, u32); 11350d81a51aSDavid Howells 11360d81a51aSDavid Howells /* 11370b58b8a1SDavid Howells * sendmsg.c 11380b58b8a1SDavid Howells */ 11390b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 11400b58b8a1SDavid Howells 11410b58b8a1SDavid Howells /* 1142ca7fb100SDavid Howells * server_key.c 1143ca7fb100SDavid Howells */ 1144ca7fb100SDavid Howells extern struct key_type key_type_rxrpc_s; 1145ca7fb100SDavid Howells 1146ca7fb100SDavid Howells int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1147ca7fb100SDavid Howells 1148ca7fb100SDavid Howells /* 11490d81a51aSDavid Howells * skbuff.c 11500d81a51aSDavid Howells */ 1151d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 11520d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 115371f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 115471f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1155d0d5c0cdSDavid Howells void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 115671f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 115771f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1158df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 11590d81a51aSDavid Howells 11600d81a51aSDavid Howells /* 1161b0154246SDavid Howells * stats.c 1162b0154246SDavid Howells */ 1163b0154246SDavid Howells int rxrpc_stats_show(struct seq_file *seq, void *v); 1164b0154246SDavid Howells int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1165b0154246SDavid Howells 1166b0154246SDavid Howells #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1167b0154246SDavid Howells #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1168b0154246SDavid Howells 1169b0154246SDavid Howells /* 11705873c083SDavid Howells * sysctl.c 11715873c083SDavid Howells */ 11725873c083SDavid Howells #ifdef CONFIG_SYSCTL 11735873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11745873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11755873c083SDavid Howells #else 11765873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11775873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11785873c083SDavid Howells #endif 11795873c083SDavid Howells 11805873c083SDavid Howells /* 118102a19356SDavid Howells * txbuf.c 118202a19356SDavid Howells */ 118302a19356SDavid Howells extern atomic_t rxrpc_nr_txbuf; 118402a19356SDavid Howells struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type, 118502a19356SDavid Howells gfp_t gfp); 118602a19356SDavid Howells void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 118702a19356SDavid Howells void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 118802a19356SDavid Howells void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what); 118902a19356SDavid Howells 119002a19356SDavid Howells /* 1191be6e6707SDavid Howells * utils.c 1192be6e6707SDavid Howells */ 11935a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1194be6e6707SDavid Howells 1195248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1196248f219cSDavid Howells { 1197248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1198248f219cSDavid Howells } 1199248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1200248f219cSDavid Howells { 1201248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1202248f219cSDavid Howells } 1203248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1204248f219cSDavid Howells { 1205248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1206248f219cSDavid Howells } 1207248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1208248f219cSDavid Howells { 1209248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1210248f219cSDavid Howells } 1211248f219cSDavid Howells 1212be6e6707SDavid Howells /* 121317926a79SDavid Howells * debug tracing 121417926a79SDavid Howells */ 121595c96174SEric Dumazet extern unsigned int rxrpc_debug; 121617926a79SDavid Howells 121717926a79SDavid Howells #define dbgprintk(FMT,...) \ 12189f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 121917926a79SDavid Howells 12200dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 12210dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 122217926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 122317926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 122417926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 122517926a79SDavid Howells 122617926a79SDavid Howells 122717926a79SDavid Howells #if defined(__KDEBUG) 122817926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 122917926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 123017926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 123117926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 123217926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 123317926a79SDavid Howells 123417926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 123517926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 123617926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 123717926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 123817926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 123917926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 124017926a79SDavid Howells 124117926a79SDavid Howells #define _enter(FMT,...) \ 124217926a79SDavid Howells do { \ 124317926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 124417926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 124517926a79SDavid Howells } while (0) 124617926a79SDavid Howells 124717926a79SDavid Howells #define _leave(FMT,...) \ 124817926a79SDavid Howells do { \ 124917926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 125017926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 125117926a79SDavid Howells } while (0) 125217926a79SDavid Howells 125317926a79SDavid Howells #define _debug(FMT,...) \ 125417926a79SDavid Howells do { \ 125517926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 125617926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 125717926a79SDavid Howells } while (0) 125817926a79SDavid Howells 125917926a79SDavid Howells #define _proto(FMT,...) \ 126017926a79SDavid Howells do { \ 126117926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 126217926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 126317926a79SDavid Howells } while (0) 126417926a79SDavid Howells 126517926a79SDavid Howells #define _net(FMT,...) \ 126617926a79SDavid Howells do { \ 126717926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 126817926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 126917926a79SDavid Howells } while (0) 127017926a79SDavid Howells 127117926a79SDavid Howells #else 127212fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 127312fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 127412fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 127512fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 127612fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 127717926a79SDavid Howells #endif 127817926a79SDavid Howells 127917926a79SDavid Howells /* 128017926a79SDavid Howells * debug assertion checking 128117926a79SDavid Howells */ 128217926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 128317926a79SDavid Howells 128417926a79SDavid Howells #define ASSERT(X) \ 128517926a79SDavid Howells do { \ 128617926a79SDavid Howells if (unlikely(!(X))) { \ 12879b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 128817926a79SDavid Howells BUG(); \ 128917926a79SDavid Howells } \ 129017926a79SDavid Howells } while (0) 129117926a79SDavid Howells 129217926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 129317926a79SDavid Howells do { \ 1294cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1295cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12969b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12979b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1298cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1299cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 130017926a79SDavid Howells BUG(); \ 130117926a79SDavid Howells } \ 130217926a79SDavid Howells } while (0) 130317926a79SDavid Howells 130417926a79SDavid Howells #define ASSERTIF(C, X) \ 130517926a79SDavid Howells do { \ 130617926a79SDavid Howells if (unlikely((C) && !(X))) { \ 13079b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 130817926a79SDavid Howells BUG(); \ 130917926a79SDavid Howells } \ 131017926a79SDavid Howells } while (0) 131117926a79SDavid Howells 131217926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 131317926a79SDavid Howells do { \ 1314cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1315cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 13169b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 13179b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1318cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1319cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 132017926a79SDavid Howells BUG(); \ 132117926a79SDavid Howells } \ 132217926a79SDavid Howells } while (0) 132317926a79SDavid Howells 132417926a79SDavid Howells #else 132517926a79SDavid Howells 132617926a79SDavid Howells #define ASSERT(X) \ 132717926a79SDavid Howells do { \ 132817926a79SDavid Howells } while (0) 132917926a79SDavid Howells 133017926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 133117926a79SDavid Howells do { \ 133217926a79SDavid Howells } while (0) 133317926a79SDavid Howells 133417926a79SDavid Howells #define ASSERTIF(C, X) \ 133517926a79SDavid Howells do { \ 133617926a79SDavid Howells } while (0) 133717926a79SDavid Howells 133817926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 133917926a79SDavid Howells do { \ 134017926a79SDavid Howells } while (0) 134117926a79SDavid Howells 134217926a79SDavid Howells #endif /* __KDEBUGALL */ 1343