12874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 217926a79SDavid Howells /* AF_RXRPC internal definitions 317926a79SDavid Howells * 417926a79SDavid Howells * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 517926a79SDavid Howells * Written by David Howells (dhowells@redhat.com) 617926a79SDavid Howells */ 717926a79SDavid Howells 8be6e6707SDavid Howells #include <linux/atomic.h> 98496af50SDavid Howells #include <linux/seqlock.h> 10c410bf01SDavid Howells #include <linux/win_minmax.h> 112baec2c3SDavid Howells #include <net/net_namespace.h> 122baec2c3SDavid Howells #include <net/netns/generic.h> 13e0e4d82fSDavid Howells #include <net/sock.h> 14be6e6707SDavid Howells #include <net/af_rxrpc.h> 1541057ebdSDavid Howells #include <keys/rxrpc-type.h> 16ddc6c70fSDavid Howells #include "protocol.h" 1717926a79SDavid Howells 1817926a79SDavid Howells #define FCRYPT_BSIZE 8 1917926a79SDavid Howells struct rxrpc_crypt { 2017926a79SDavid Howells union { 2117926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 2291e916cfSAl Viro __be32 n[2]; 2317926a79SDavid Howells }; 2417926a79SDavid Howells } __attribute__((aligned(8))); 2517926a79SDavid Howells 26651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 27651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 28651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 29651350d1SDavid Howells 3012da59fcSDavid Howells struct key_preparsed_payload; 31cc8feb8eSDavid Howells struct rxrpc_connection; 32cc8feb8eSDavid Howells 3317926a79SDavid Howells /* 34ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 35ece64fecSDavid Howells * to pass supplementary information. 36d001648eSDavid Howells */ 37d001648eSDavid Howells enum rxrpc_skb_mark { 38ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 39ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 40d001648eSDavid Howells }; 41d001648eSDavid Howells 42d001648eSDavid Howells /* 4317926a79SDavid Howells * sk_state for RxRPC sockets 4417926a79SDavid Howells */ 4517926a79SDavid Howells enum { 462341e077SDavid Howells RXRPC_UNBOUND = 0, 472341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 4817926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 4917926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5028036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 5117926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 52210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 5317926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 5417926a79SDavid Howells }; 5517926a79SDavid Howells 5617926a79SDavid Howells /* 572baec2c3SDavid Howells * Per-network namespace data. 582baec2c3SDavid Howells */ 592baec2c3SDavid Howells struct rxrpc_net { 602baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 612baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 622baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 63ad25f5cbSDavid Howells spinlock_t call_lock; /* Lock for ->calls */ 64d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 652baec2c3SDavid Howells 6631f5f9a1SDavid Howells atomic_t nr_conns; 672baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 682baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 692baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 703d18cbb7SDavid Howells struct work_struct service_conn_reaper; 713d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 722baec2c3SDavid Howells 73f859ab61SDavid Howells bool live; 74245500d8SDavid Howells 75245500d8SDavid Howells bool kill_all_client_conns; 76245500d8SDavid Howells atomic_t nr_client_conns; 772baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 782baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 792baec2c3SDavid Howells struct list_head idle_client_conns; 803d18cbb7SDavid Howells struct work_struct client_conn_reaper; 813d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 822baec2c3SDavid Howells 8333912c26SDavid Howells struct hlist_head local_endpoints; 842baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 852baec2c3SDavid Howells 862baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 87ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 88ace45becSDavid Howells 89ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 90ace45becSDavid Howells u8 peer_keepalive_cursor; 91330bdcfaSDavid Howells time64_t peer_keepalive_base; 92330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 93330bdcfaSDavid Howells struct list_head peer_keepalive_new; 94ace45becSDavid Howells struct timer_list peer_keepalive_timer; 95ace45becSDavid Howells struct work_struct peer_keepalive_work; 96b0154246SDavid Howells 97b0154246SDavid Howells atomic_t stat_tx_data; 98b0154246SDavid Howells atomic_t stat_tx_data_retrans; 99b0154246SDavid Howells atomic_t stat_tx_data_send; 100b0154246SDavid Howells atomic_t stat_tx_data_send_frag; 101b0154246SDavid Howells atomic_t stat_rx_data; 102b0154246SDavid Howells atomic_t stat_rx_data_reqack; 103b0154246SDavid Howells atomic_t stat_rx_data_jumbo; 104*f2a676d1SDavid Howells 105*f2a676d1SDavid Howells atomic_t stat_tx_ack_fill; 106*f2a676d1SDavid Howells atomic_t stat_tx_ack_send; 107*f2a676d1SDavid Howells atomic_t stat_tx_ack_skip; 108*f2a676d1SDavid Howells atomic_t stat_tx_acks[256]; 109*f2a676d1SDavid Howells atomic_t stat_rx_acks[256]; 1102baec2c3SDavid Howells }; 1112baec2c3SDavid Howells 1122baec2c3SDavid Howells /* 11300e90712SDavid Howells * Service backlog preallocation. 11400e90712SDavid Howells * 11500e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 11600e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 11700e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 11800e90712SDavid Howells * shuffle packets around so much. 11900e90712SDavid Howells */ 12000e90712SDavid Howells struct rxrpc_backlog { 12100e90712SDavid Howells unsigned short peer_backlog_head; 12200e90712SDavid Howells unsigned short peer_backlog_tail; 12300e90712SDavid Howells unsigned short conn_backlog_head; 12400e90712SDavid Howells unsigned short conn_backlog_tail; 12500e90712SDavid Howells unsigned short call_backlog_head; 12600e90712SDavid Howells unsigned short call_backlog_tail; 12700e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 12800e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 12900e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 13000e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 13100e90712SDavid Howells }; 13200e90712SDavid Howells 13300e90712SDavid Howells /* 13417926a79SDavid Howells * RxRPC socket definition 13517926a79SDavid Howells */ 13617926a79SDavid Howells struct rxrpc_sock { 13717926a79SDavid Howells /* WARNING: sk has to be the first member */ 13817926a79SDavid Howells struct sock sk; 139d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 14000e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 14117926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 14200e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 143248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 144248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 145248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 146248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 147248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 14817926a79SDavid Howells struct key *key; /* security for this socket */ 14917926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 15000e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 15117926a79SDavid Howells unsigned long flags; 1522341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 15317926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 15417926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 15517926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 156cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 15728036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1584722974dSDavid Howells struct { 1594722974dSDavid Howells /* Service upgrade information */ 1604722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1614722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1624722974dSDavid Howells } service_upgrade; 163cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1644722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1652341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 16617926a79SDavid Howells }; 16717926a79SDavid Howells 16817926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 16917926a79SDavid Howells 17017926a79SDavid Howells /* 1710d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1720d12f8a4SDavid Howells */ 1730d12f8a4SDavid Howells struct rxrpc_host_header { 1740d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1750d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1760d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1770d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1780d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1790d12f8a4SDavid Howells u8 type; /* packet type */ 1800d12f8a4SDavid Howells u8 flags; /* packet flags */ 1810d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1820d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1830d12f8a4SDavid Howells union { 1840d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1850d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1860d12f8a4SDavid Howells }; 1870d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1880d12f8a4SDavid Howells } __packed; 1890d12f8a4SDavid Howells 1900d12f8a4SDavid Howells /* 19117926a79SDavid Howells * RxRPC socket buffer private variables 19217926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 19317926a79SDavid Howells */ 19417926a79SDavid Howells struct rxrpc_skb_priv { 195987db9f7SDavid Howells atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 196c3c9e3dfSDavid Howells u8 nr_subpackets; /* Number of subpackets */ 197c3c9e3dfSDavid Howells u8 rx_flags; /* Received packet flags */ 198c3c9e3dfSDavid Howells #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 199b311e684SDavid Howells #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 20017926a79SDavid Howells union { 20117926a79SDavid Howells int remain; /* amount of space remaining for next write */ 202c3c9e3dfSDavid Howells 203c3c9e3dfSDavid Howells /* List of requested ACKs on subpackets */ 204c3c9e3dfSDavid Howells unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 205c3c9e3dfSDavid Howells BITS_PER_LONG]; 20617926a79SDavid Howells }; 20717926a79SDavid Howells 2080d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 20917926a79SDavid Howells }; 21017926a79SDavid Howells 21117926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 21217926a79SDavid Howells 21317926a79SDavid Howells /* 21417926a79SDavid Howells * RxRPC security module interface 21517926a79SDavid Howells */ 21617926a79SDavid Howells struct rxrpc_security { 21717926a79SDavid Howells const char *name; /* name of this service */ 21817926a79SDavid Howells u8 security_index; /* security type provided */ 219063c60d3SDavid Howells u32 no_key_abort; /* Abort code indicating no key */ 22017926a79SDavid Howells 221648af7fcSDavid Howells /* Initialise a security service */ 222648af7fcSDavid Howells int (*init)(void); 223648af7fcSDavid Howells 224648af7fcSDavid Howells /* Clean up a security service */ 225648af7fcSDavid Howells void (*exit)(void); 226648af7fcSDavid Howells 22712da59fcSDavid Howells /* Parse the information from a server key */ 22812da59fcSDavid Howells int (*preparse_server_key)(struct key_preparsed_payload *); 22912da59fcSDavid Howells 23012da59fcSDavid Howells /* Clean up the preparse buffer after parsing a server key */ 23112da59fcSDavid Howells void (*free_preparse_server_key)(struct key_preparsed_payload *); 23212da59fcSDavid Howells 23312da59fcSDavid Howells /* Destroy the payload of a server key */ 23412da59fcSDavid Howells void (*destroy_server_key)(struct key *); 23512da59fcSDavid Howells 236d5953f65SDavid Howells /* Describe a server key */ 237d5953f65SDavid Howells void (*describe_server_key)(const struct key *, struct seq_file *); 238d5953f65SDavid Howells 23917926a79SDavid Howells /* initialise a connection's security */ 24041057ebdSDavid Howells int (*init_connection_security)(struct rxrpc_connection *, 24141057ebdSDavid Howells struct rxrpc_key_token *); 24217926a79SDavid Howells 243d7d775b1SDavid Howells /* Work out how much data we can store in a packet, given an estimate 244d7d775b1SDavid Howells * of the amount of data remaining. 245d7d775b1SDavid Howells */ 246d7d775b1SDavid Howells int (*how_much_data)(struct rxrpc_call *, size_t, 247d7d775b1SDavid Howells size_t *, size_t *, size_t *); 24817926a79SDavid Howells 24917926a79SDavid Howells /* impose security on a packet */ 250f4bdf3d6SDavid Howells int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t); 25117926a79SDavid Howells 25217926a79SDavid Howells /* verify the security on a received packet */ 2535a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 254248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 255248f219cSDavid Howells 2561db88c53SDavid Howells /* Free crypto request on a call */ 2571db88c53SDavid Howells void (*free_call_crypto)(struct rxrpc_call *); 2581db88c53SDavid Howells 259248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 260248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 261248f219cSDavid Howells unsigned int *, unsigned int *); 26217926a79SDavid Howells 26317926a79SDavid Howells /* issue a challenge */ 26417926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 26517926a79SDavid Howells 26617926a79SDavid Howells /* respond to a challenge */ 26717926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 26817926a79SDavid Howells struct sk_buff *, 26917926a79SDavid Howells u32 *); 27017926a79SDavid Howells 27117926a79SDavid Howells /* verify a response */ 27217926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 27317926a79SDavid Howells struct sk_buff *, 27417926a79SDavid Howells u32 *); 27517926a79SDavid Howells 27617926a79SDavid Howells /* clear connection security */ 27717926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 27817926a79SDavid Howells }; 27917926a79SDavid Howells 28017926a79SDavid Howells /* 2814f95dd78SDavid Howells * RxRPC local transport endpoint description 2824f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2834f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 28417926a79SDavid Howells */ 28517926a79SDavid Howells struct rxrpc_local { 2864f95dd78SDavid Howells struct rcu_head rcu; 287730c5fd4SDavid Howells atomic_t active_users; /* Number of users of the local endpoint */ 288a0575429SDavid Howells refcount_t ref; /* Number of references to the structure */ 2892baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 29033912c26SDavid Howells struct hlist_node link; 29117926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2924f95dd78SDavid Howells struct work_struct processor; 2931e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 29417926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 29517926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 29644ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 297245500d8SDavid Howells struct rb_root client_bundles; /* Client connection bundles by socket params */ 298245500d8SDavid Howells spinlock_t client_bundles_lock; /* Lock for client_bundles */ 29917926a79SDavid Howells spinlock_t lock; /* access lock */ 30017926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 30117926a79SDavid Howells int debug_id; /* debug ID for printks */ 3024f95dd78SDavid Howells bool dead; 303f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 30417926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 30517926a79SDavid Howells }; 30617926a79SDavid Howells 30717926a79SDavid Howells /* 30817926a79SDavid Howells * RxRPC remote transport endpoint definition 309be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 31017926a79SDavid Howells */ 31117926a79SDavid Howells struct rxrpc_peer { 312be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 313a0575429SDavid Howells refcount_t ref; 314be6e6707SDavid Howells unsigned long hash_key; 315be6e6707SDavid Howells struct hlist_node hash_link; 316be6e6707SDavid Howells struct rxrpc_local *local; 317f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 318aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 319330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 320ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 3218496af50SDavid Howells seqlock_t service_conn_lock; 32217926a79SDavid Howells spinlock_t lock; /* access lock */ 32395c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 32495c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 32595c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 32617926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 32717926a79SDavid Howells int debug_id; /* debug ID for printks */ 32817926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 32917926a79SDavid Howells 33017926a79SDavid Howells /* calculated RTT cache */ 33117926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 332c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3330d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 334c410bf01SDavid Howells unsigned int rtt_count; /* Number of samples we've got */ 335c410bf01SDavid Howells 336c410bf01SDavid Howells u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 337c410bf01SDavid Howells u32 mdev_us; /* medium deviation */ 338c410bf01SDavid Howells u32 mdev_max_us; /* maximal mdev for the last rtt period */ 339c410bf01SDavid Howells u32 rttvar_us; /* smoothed mdev_max */ 340c410bf01SDavid Howells u32 rto_j; /* Retransmission timeout in jiffies */ 341c410bf01SDavid Howells u8 backoff; /* Backoff timeout */ 342f7aec129SDavid Howells 343f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 34417926a79SDavid Howells }; 34517926a79SDavid Howells 34617926a79SDavid Howells /* 34719ffa01cSDavid Howells * Keys for matching a connection. 34819ffa01cSDavid Howells */ 34919ffa01cSDavid Howells struct rxrpc_conn_proto { 350e8d70ce1SDavid Howells union { 351e8d70ce1SDavid Howells struct { 35219ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 35319ffa01cSDavid Howells u32 cid; /* connection ID */ 354e8d70ce1SDavid Howells }; 355e8d70ce1SDavid Howells u64 index_key; 35619ffa01cSDavid Howells }; 35719ffa01cSDavid Howells }; 35819ffa01cSDavid Howells 35919ffa01cSDavid Howells struct rxrpc_conn_parameters { 36019ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 36119ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 36219ffa01cSDavid Howells struct key *key; /* Security details */ 36319ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3644e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 36519ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 36619ffa01cSDavid Howells u32 security_level; /* Security level selected */ 36719ffa01cSDavid Howells }; 36819ffa01cSDavid Howells 36919ffa01cSDavid Howells /* 370bba304dbSDavid Howells * Bits in the connection flags. 371bba304dbSDavid Howells */ 372bba304dbSDavid Howells enum rxrpc_conn_flag { 373bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 374001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 37545025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 3764e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3773136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3783136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3793136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3803136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 381bba304dbSDavid Howells }; 382bba304dbSDavid Howells 3833136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3843136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3853136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3863136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3873136ef49SDavid Howells 388bba304dbSDavid Howells /* 389bba304dbSDavid Howells * Events that can be raised upon a connection. 390bba304dbSDavid Howells */ 391bba304dbSDavid Howells enum rxrpc_conn_event { 392bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 393bba304dbSDavid Howells }; 394bba304dbSDavid Howells 395bba304dbSDavid Howells /* 396bba304dbSDavid Howells * The connection protocol state. 397bba304dbSDavid Howells */ 398bba304dbSDavid Howells enum rxrpc_conn_proto_state { 399bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 400bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 40100e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 402bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 403bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 404bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 405bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 406bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 407bba304dbSDavid Howells RXRPC_CONN__NR_STATES 408bba304dbSDavid Howells }; 409bba304dbSDavid Howells 410bba304dbSDavid Howells /* 411245500d8SDavid Howells * RxRPC client connection bundle. 412245500d8SDavid Howells */ 413245500d8SDavid Howells struct rxrpc_bundle { 414245500d8SDavid Howells struct rxrpc_conn_parameters params; 415a0575429SDavid Howells refcount_t ref; 416245500d8SDavid Howells unsigned int debug_id; 417245500d8SDavid Howells bool try_upgrade; /* True if the bundle is attempting upgrade */ 418245500d8SDavid Howells bool alloc_conn; /* True if someone's getting a conn */ 4198806245aSDavid Howells short alloc_error; /* Error from last conn allocation */ 420245500d8SDavid Howells spinlock_t channel_lock; 421245500d8SDavid Howells struct rb_node local_node; /* Node in local->client_conns */ 422245500d8SDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 423245500d8SDavid Howells unsigned long avail_chans; /* Mask of available channels */ 424245500d8SDavid Howells struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */ 425245500d8SDavid Howells }; 426245500d8SDavid Howells 427245500d8SDavid Howells /* 42817926a79SDavid Howells * RxRPC connection definition 429aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 43017926a79SDavid Howells * - each connection can only handle four simultaneous calls 43117926a79SDavid Howells */ 43217926a79SDavid Howells struct rxrpc_connection { 43319ffa01cSDavid Howells struct rxrpc_conn_proto proto; 43419ffa01cSDavid Howells struct rxrpc_conn_parameters params; 43519ffa01cSDavid Howells 436a0575429SDavid Howells refcount_t ref; 43745025bceSDavid Howells struct rcu_head rcu; 43845025bceSDavid Howells struct list_head cache_link; 439a1399f8bSDavid Howells 440245500d8SDavid Howells unsigned char act_chans; /* Mask of active channels */ 441a1399f8bSDavid Howells struct rxrpc_channel { 4423136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 443a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4444764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 445a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 446a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 447a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 44818bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 44918bfeba5SDavid Howells union { 45018bfeba5SDavid Howells u32 last_seq; 45118bfeba5SDavid Howells u32 last_abort; 45218bfeba5SDavid Howells }; 453a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 454999b69f8SDavid Howells 4553136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 45617926a79SDavid Howells struct work_struct processor; /* connection event processor */ 457245500d8SDavid Howells struct rxrpc_bundle *bundle; /* Client connection bundle */ 458aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 4594d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 46017926a79SDavid Howells struct list_head link; /* link in master connection list */ 46117926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 462521bb304SDavid Howells 463648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 464521bb304SDavid Howells union { 465521bb304SDavid Howells struct { 46669d826faSKees Cook struct crypto_sync_skcipher *cipher; /* encryption handle */ 46717926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 468521bb304SDavid Howells u32 nonce; /* response re-use preventer */ 469521bb304SDavid Howells } rxkad; 470521bb304SDavid Howells }; 4714a3388c8SDavid Howells unsigned long flags; 47217926a79SDavid Howells unsigned long events; 473f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 47417926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 475cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 47664753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 47717926a79SDavid Howells int debug_id; /* debug ID for printks */ 47817926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 479563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 480c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 48117926a79SDavid Howells u8 security_ix; /* security type */ 48217926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 483245500d8SDavid Howells u8 bundle_shift; /* Index into bundle->avail_chans */ 48464753092SDavid Howells short error; /* Local error code */ 48517926a79SDavid Howells }; 48617926a79SDavid Howells 487dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 488dc71db34SDavid Howells { 489dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 490dc71db34SDavid Howells } 491dc71db34SDavid Howells 492dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 493dc71db34SDavid Howells { 494dc71db34SDavid Howells return !rxrpc_to_server(sp); 495dc71db34SDavid Howells } 496dc71db34SDavid Howells 49717926a79SDavid Howells /* 4985b8848d1SDavid Howells * Flags in call->flags. 4995b8848d1SDavid Howells */ 5005b8848d1SDavid Howells enum rxrpc_call_flag { 5015b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 5025b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 503dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 50445025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 505248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 506248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 507a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 50857494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 509c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 5101a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 511d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 5125273a191SDavid Howells RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 513b7a7d674SDavid Howells RXRPC_CALL_KERNEL, /* The call was made by the kernel */ 514245500d8SDavid Howells RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ 5155b8848d1SDavid Howells }; 5165b8848d1SDavid Howells 5175b8848d1SDavid Howells /* 5185b8848d1SDavid Howells * Events that can be raised on a call. 5195b8848d1SDavid Howells */ 5205b8848d1SDavid Howells enum rxrpc_call_event { 5214c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 5224c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 5234c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 524a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 525a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 526bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 5275b8848d1SDavid Howells }; 5285b8848d1SDavid Howells 5295b8848d1SDavid Howells /* 5305b8848d1SDavid Howells * The states that a call can be in. 5315b8848d1SDavid Howells */ 5325b8848d1SDavid Howells enum rxrpc_call_state { 533999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 534999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5355b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5365b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5375b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 53800e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5395b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5405b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5415b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5425b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5435b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 544f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 545f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 546f5c17aaeSDavid Howells }; 547f5c17aaeSDavid Howells 548f5c17aaeSDavid Howells /* 549e122d845SDavid Howells * Call completion condition (state == RXRPC_CALL_COMPLETE). 550e122d845SDavid Howells */ 551e122d845SDavid Howells enum rxrpc_call_completion { 552e122d845SDavid Howells RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 553e122d845SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 554e122d845SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 555e122d845SDavid Howells RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 556e122d845SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 557e122d845SDavid Howells NR__RXRPC_CALL_COMPLETIONS 558e122d845SDavid Howells }; 559e122d845SDavid Howells 560e122d845SDavid Howells /* 56157494343SDavid Howells * Call Tx congestion management modes. 56257494343SDavid Howells */ 56357494343SDavid Howells enum rxrpc_congest_mode { 56457494343SDavid Howells RXRPC_CALL_SLOW_START, 56557494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 56657494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 56757494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 56857494343SDavid Howells NR__RXRPC_CONGEST_MODES 56957494343SDavid Howells }; 57057494343SDavid Howells 57157494343SDavid Howells /* 57217926a79SDavid Howells * RxRPC call definition 57317926a79SDavid Howells * - matched by { connection, call_id } 57417926a79SDavid Howells */ 57517926a79SDavid Howells struct rxrpc_call { 576dee46364SDavid Howells struct rcu_head rcu; 57717926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 578df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5798d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 580d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 58191fcfbe8SDavid Howells const struct rxrpc_security *security; /* applied security module */ 582540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 583a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 584bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 585a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 586a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 587415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 588a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 589a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 590a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 591a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 592a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 5931db88c53SDavid Howells struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 594248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 595248f219cSDavid Howells struct work_struct processor; /* Event processor */ 596d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 59717926a79SDavid Howells struct list_head link; /* link in master call list */ 598245500d8SDavid Howells struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */ 599f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 600248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 601248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 602248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 603248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 60417926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 60545025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 606e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 607a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 60817926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 60917926a79SDavid Howells unsigned long flags; 61017926a79SDavid Howells unsigned long events; 61117926a79SDavid Howells spinlock_t lock; 61220acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 61317926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 614f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 615f5c17aaeSDavid Howells int error; /* Local error incurred */ 616cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 617cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 618a0575429SDavid Howells refcount_t ref; 619dabe5a79SDavid Howells u16 service_id; /* service ID */ 620278ac0cdSDavid Howells u8 security_ix; /* Security type */ 621e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 622dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 623dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 624dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 6258e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 6268e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 627f9c32435SDavid Howells bool rx_pkt_last; /* Current recvmsg packet is last */ 62817926a79SDavid Howells 629248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 630248f219cSDavid Howells * 631248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 632248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 633248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 634248f219cSDavid Howells * 635248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 636248f219cSDavid Howells * acked. 63717926a79SDavid Howells */ 638248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 639248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 6404075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 641248f219cSDavid Howells struct sk_buff **rxtx_buffer; 642248f219cSDavid Howells u8 *rxtx_annotations; 643248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 644248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 645248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 646248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 647f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 64870790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 64970790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 65070790dbeSDavid Howells 651e2de6c40SDavid Howells #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 652248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 653248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 654248f219cSDavid Howells * not hard-ACK'd packet follows this. 655248f219cSDavid Howells */ 656248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 657c7e86acfSDavid Howells u16 tx_backoff; /* Delay to insert due to Tx failure */ 65857494343SDavid Howells 65957494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 66057494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 66157494343SDavid Howells * packets) rather than bytes. 66257494343SDavid Howells */ 66357494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 66457494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 66557494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 66657494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 66757494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 66857494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 66957494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 67057494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 67157494343SDavid Howells 672248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 673248f219cSDavid Howells * consumed packet follows this. 674248f219cSDavid Howells */ 675248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 676248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6771a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 678248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 679248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 68071f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 68175e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 68217926a79SDavid Howells 683c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 684c1e15b49SDavid Howells 6858940ba3cSDavid Howells /* Receive-phase ACK management (ACKs we send). */ 6864e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 6870d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 68881524b63SDavid Howells rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */ 6899a3dedcfSDavid Howells atomic_t ackr_nr_unacked; /* Number of unacked packets */ 6909a3dedcfSDavid Howells atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */ 691a5af7e1fSDavid Howells 6924700c4d8SDavid Howells /* RTT management */ 6934700c4d8SDavid Howells rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */ 6944700c4d8SDavid Howells ktime_t rtt_sent_at[4]; /* Time packet sent */ 6954700c4d8SDavid Howells unsigned long rtt_avail; /* Mask of available slots in bits 0-3, 6964700c4d8SDavid Howells * Mask of pending samples in 8-11 */ 6974700c4d8SDavid Howells #define RXRPC_CALL_RTT_AVAIL_MASK 0xf 6984700c4d8SDavid Howells #define RXRPC_CALL_RTT_PEND_SHIFT 8 69917926a79SDavid Howells 7008940ba3cSDavid Howells /* Transmission-phase ACK management (ACKs we've received). */ 70157494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 7028940ba3cSDavid Howells rxrpc_seq_t acks_first_seq; /* first sequence number received */ 70381524b63SDavid Howells rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */ 70431a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 705bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 706bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 707589a0c1eSDavid Howells rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */ 70831a1b989SDavid Howells }; 70931a1b989SDavid Howells 71031a1b989SDavid Howells /* 71157494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 71231a1b989SDavid Howells */ 71331a1b989SDavid Howells struct rxrpc_ack_summary { 71431a1b989SDavid Howells u8 ack_reason; 71531a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 71631a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 71731a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 71831a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 71931a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 72031a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 72157494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 72257494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 72357494343SDavid Howells /* Place to stash values for tracing */ 72457494343SDavid Howells enum rxrpc_congest_mode mode:8; 72557494343SDavid Howells u8 cwnd; 72657494343SDavid Howells u8 ssthresh; 72757494343SDavid Howells u8 dup_acks; 72857494343SDavid Howells u8 cumulative_acks; 72917926a79SDavid Howells }; 73017926a79SDavid Howells 73148124178SDavid Howells /* 73248124178SDavid Howells * sendmsg() cmsg-specified parameters. 73348124178SDavid Howells */ 73448124178SDavid Howells enum rxrpc_command { 73548124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 73648124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 73748124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 7382d914c1bSDavid Howells RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */ 73948124178SDavid Howells }; 74048124178SDavid Howells 74148124178SDavid Howells struct rxrpc_call_params { 74248124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 74348124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 74448124178SDavid Howells struct { 74548124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 74648124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 74748124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 74848124178SDavid Howells } timeouts; 74948124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 750b7a7d674SDavid Howells bool kernel; /* T if kernel is making the call */ 751e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 75248124178SDavid Howells }; 75348124178SDavid Howells 75448124178SDavid Howells struct rxrpc_send_params { 75548124178SDavid Howells struct rxrpc_call_params call; 75648124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 75748124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 75848124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 75948124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 76048124178SDavid Howells }; 76148124178SDavid Howells 762df844fd4SDavid Howells #include <trace/events/rxrpc.h> 763df844fd4SDavid Howells 76417926a79SDavid Howells /* 765651350d1SDavid Howells * af_rxrpc.c 76617926a79SDavid Howells */ 76771f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 768651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 76917926a79SDavid Howells 77017926a79SDavid Howells /* 7710d81a51aSDavid Howells * call_accept.c 77217926a79SDavid Howells */ 77300e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 77400e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 775248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7760099dc58SDavid Howells struct rxrpc_sock *, 777248f219cSDavid Howells struct sk_buff *); 7784f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 7792d914c1bSDavid Howells int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); 78017926a79SDavid Howells 78117926a79SDavid Howells /* 7820d81a51aSDavid Howells * call_event.c 78317926a79SDavid Howells */ 784e8c3af6bSDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 7859c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 786c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 78717926a79SDavid Howells 7884a7f62f9SDavid Howells void rxrpc_reduce_call_timer(struct rxrpc_call *call, 789a158bdd3SDavid Howells unsigned long expire_at, 790a158bdd3SDavid Howells unsigned long now, 7914a7f62f9SDavid Howells enum rxrpc_timer_trace why); 7924a7f62f9SDavid Howells 7934a7f62f9SDavid Howells void rxrpc_delete_call_timer(struct rxrpc_call *call); 794a158bdd3SDavid Howells 79517926a79SDavid Howells /* 7960d81a51aSDavid Howells * call_object.c 79717926a79SDavid Howells */ 798f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 799f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 80017926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 80117926a79SDavid Howells 8022341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 803a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 8042341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 80519ffa01cSDavid Howells struct rxrpc_conn_parameters *, 806999b69f8SDavid Howells struct sockaddr_rxrpc *, 807a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 808a25e21f0SDavid Howells unsigned int); 809248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 81042886ffeSDavid Howells struct sk_buff *); 8118d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 812c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 8138d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 8148d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 815e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 8164a7f62f9SDavid Howells bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op); 817fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 818fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 81900e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 8202baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 82117926a79SDavid Howells 822dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 823dabe5a79SDavid Howells { 824dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 825dabe5a79SDavid Howells } 826dabe5a79SDavid Howells 827dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 828dabe5a79SDavid Howells { 829dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 830dabe5a79SDavid Howells } 831dabe5a79SDavid Howells 83217926a79SDavid Howells /* 8334a3388c8SDavid Howells * conn_client.c 8344a3388c8SDavid Howells */ 83545025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 836a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 837a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 8384a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 8394a3388c8SDavid Howells 840eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 841245500d8SDavid Howells struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *); 842245500d8SDavid Howells void rxrpc_put_bundle(struct rxrpc_bundle *); 8435e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 8445e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 8455e33a23bSDavid Howells gfp_t); 84645025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 847245500d8SDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *); 84845025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 8492baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 8502baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 851d12040b6SDavid Howells void rxrpc_clean_up_local_conns(struct rxrpc_local *); 8524a3388c8SDavid Howells 8534a3388c8SDavid Howells /* 8540d81a51aSDavid Howells * conn_event.c 8550d81a51aSDavid Howells */ 8560d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 857ddc7834aSDavid Howells void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool); 8580d81a51aSDavid Howells 8590d81a51aSDavid Howells /* 8600d81a51aSDavid Howells * conn_object.c 86117926a79SDavid Howells */ 862dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 863f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 86417926a79SDavid Howells 865c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 8668496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 8670099dc58SDavid Howells struct sk_buff *, 8680099dc58SDavid Howells struct rxrpc_peer **); 86945025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 870999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 87145025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 872363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 873363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 874245500d8SDavid Howells struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *); 875363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 876363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 8772baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 8782baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 87917926a79SDavid Howells 88019ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 88119ffa01cSDavid Howells { 88219ffa01cSDavid Howells return conn->out_clientflag; 88319ffa01cSDavid Howells } 88419ffa01cSDavid Howells 88519ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 88619ffa01cSDavid Howells { 887e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 88819ffa01cSDavid Howells } 88919ffa01cSDavid Howells 890f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 891f51b4480SDavid Howells { 89245025bceSDavid Howells if (!conn) 89345025bceSDavid Howells return; 89445025bceSDavid Howells 895363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 89645025bceSDavid Howells rxrpc_put_client_conn(conn); 897363deeabSDavid Howells else 898363deeabSDavid Howells rxrpc_put_service_conn(conn); 8995acbee46SDavid Howells } 9005acbee46SDavid Howells 9013136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9023136ef49SDavid Howells unsigned long expire_at) 9033136ef49SDavid Howells { 9043136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9053136ef49SDavid Howells } 9063136ef49SDavid Howells 90717926a79SDavid Howells /* 9087877a4a4SDavid Howells * conn_service.c 9097877a4a4SDavid Howells */ 9108496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9118496af50SDavid Howells struct sk_buff *); 9122baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 913063c60d3SDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 914ec832bd0SDavid Howells const struct rxrpc_security *, struct sk_buff *); 915001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9167877a4a4SDavid Howells 9177877a4a4SDavid Howells /* 9180d81a51aSDavid Howells * input.c 91917926a79SDavid Howells */ 9205271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 92117926a79SDavid Howells 92217926a79SDavid Howells /* 9230d81a51aSDavid Howells * insecure.c 92417926a79SDavid Howells */ 9250d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 92617926a79SDavid Howells 92717926a79SDavid Howells /* 9280d81a51aSDavid Howells * key.c 92917926a79SDavid Howells */ 93017926a79SDavid Howells extern struct key_type key_type_rxrpc; 93117926a79SDavid Howells 932a7b75c5aSChristoph Hellwig int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int); 93310674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 934c1b1203dSJoe Perches u32); 93517926a79SDavid Howells 93617926a79SDavid Howells /* 93787563616SDavid Howells * local_event.c 93887563616SDavid Howells */ 9394f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 94087563616SDavid Howells 94187563616SDavid Howells /* 9420d81a51aSDavid Howells * local_object.c 94317926a79SDavid Howells */ 9442baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 94509d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 94609d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 94709d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 948730c5fd4SDavid Howells struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 949730c5fd4SDavid Howells void rxrpc_unuse_local(struct rxrpc_local *); 95009d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 9512baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 952e0e4d82fSDavid Howells 95304d36d74SDavid Howells static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 95404d36d74SDavid Howells { 95504d36d74SDavid Howells return atomic_dec_return(&local->active_users) == 0; 95604d36d74SDavid Howells } 95704d36d74SDavid Howells 95804d36d74SDavid Howells static inline bool __rxrpc_use_local(struct rxrpc_local *local) 95904d36d74SDavid Howells { 96004d36d74SDavid Howells return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 96104d36d74SDavid Howells } 96204d36d74SDavid Howells 963e0e4d82fSDavid Howells /* 9648e688d9cSDavid Howells * misc.c 9658e688d9cSDavid Howells */ 9660e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 967a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 968a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 969a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 9708e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 9718e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 9728e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 9738e688d9cSDavid Howells 9748e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 9758e688d9cSDavid Howells 9768e688d9cSDavid Howells /* 9772baec2c3SDavid Howells * net_ns.c 9782baec2c3SDavid Howells */ 9792baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 9802baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 9812baec2c3SDavid Howells 9822baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 9832baec2c3SDavid Howells { 9842baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 9852baec2c3SDavid Howells } 9862baec2c3SDavid Howells 9872baec2c3SDavid Howells /* 9880d81a51aSDavid Howells * output.c 9890d81a51aSDavid Howells */ 990bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 99126cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 992a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 993248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 994ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 9950d81a51aSDavid Howells 9960d81a51aSDavid Howells /* 997abe89ef0SDavid Howells * peer_event.c 9980d81a51aSDavid Howells */ 999ac56a0b4SDavid Howells void rxrpc_encap_err_rcv(struct sock *sk, struct sk_buff *skb, unsigned int udp_offset); 1000abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1001ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10020d81a51aSDavid Howells 10030d81a51aSDavid Howells /* 10040d81a51aSDavid Howells * peer_object.c 10050d81a51aSDavid Howells */ 1006be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1007be6e6707SDavid Howells const struct sockaddr_rxrpc *); 10085e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1009be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1010be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10115e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 10125e33a23bSDavid Howells struct rxrpc_peer *); 101317226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10141159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10151159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10161159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 101760034d3dSDavid Howells void rxrpc_put_peer_locked(struct rxrpc_peer *); 10180d81a51aSDavid Howells 10190d81a51aSDavid Howells /* 10200d81a51aSDavid Howells * proc.c 10210d81a51aSDavid Howells */ 1022c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1023c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 1024bc0e7cf4SDavid Howells extern const struct seq_operations rxrpc_peer_seq_ops; 102533912c26SDavid Howells extern const struct seq_operations rxrpc_local_seq_ops; 10260d81a51aSDavid Howells 10270d81a51aSDavid Howells /* 10280d81a51aSDavid Howells * recvmsg.c 10290d81a51aSDavid Howells */ 1030248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 10313067bf8cSDavid Howells bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10323067bf8cSDavid Howells bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int); 10333067bf8cSDavid Howells bool __rxrpc_call_completed(struct rxrpc_call *); 10343067bf8cSDavid Howells bool rxrpc_call_completed(struct rxrpc_call *); 10353067bf8cSDavid Howells bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10363067bf8cSDavid Howells bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int); 10370d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 10380d81a51aSDavid Howells 10390d81a51aSDavid Howells /* 10403067bf8cSDavid Howells * Abort a call due to a protocol error. 10413067bf8cSDavid Howells */ 10423067bf8cSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 10433067bf8cSDavid Howells struct sk_buff *skb, 10443067bf8cSDavid Howells const char *eproto_why, 10453067bf8cSDavid Howells const char *why, 10463067bf8cSDavid Howells u32 abort_code) 10473067bf8cSDavid Howells { 10483067bf8cSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 10493067bf8cSDavid Howells 10503067bf8cSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 10513067bf8cSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 10523067bf8cSDavid Howells } 10533067bf8cSDavid Howells 10543067bf8cSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 10553067bf8cSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 10563067bf8cSDavid Howells (abort_why), (abort_code)) 10573067bf8cSDavid Howells 10583067bf8cSDavid Howells /* 1059c410bf01SDavid Howells * rtt.c 1060c410bf01SDavid Howells */ 10614700c4d8SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int, 1062c410bf01SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1063c410bf01SDavid Howells unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1064c410bf01SDavid Howells void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1065c410bf01SDavid Howells 1066c410bf01SDavid Howells /* 1067648af7fcSDavid Howells * rxkad.c 1068648af7fcSDavid Howells */ 1069648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1070648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1071648af7fcSDavid Howells #endif 1072648af7fcSDavid Howells 1073648af7fcSDavid Howells /* 10740d81a51aSDavid Howells * security.c 10750d81a51aSDavid Howells */ 10760d81a51aSDavid Howells int __init rxrpc_init_security(void); 107712da59fcSDavid Howells const struct rxrpc_security *rxrpc_security_lookup(u8); 10780d81a51aSDavid Howells void rxrpc_exit_security(void); 10790d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1080ec832bd0SDavid Howells const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *, 1081063c60d3SDavid Howells struct sk_buff *); 1082ec832bd0SDavid Howells struct key *rxrpc_look_up_server_security(struct rxrpc_connection *, 1083ec832bd0SDavid Howells struct sk_buff *, u32, u32); 10840d81a51aSDavid Howells 10850d81a51aSDavid Howells /* 10860b58b8a1SDavid Howells * sendmsg.c 10870b58b8a1SDavid Howells */ 10880b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 10890b58b8a1SDavid Howells 10900b58b8a1SDavid Howells /* 1091ca7fb100SDavid Howells * server_key.c 1092ca7fb100SDavid Howells */ 1093ca7fb100SDavid Howells extern struct key_type key_type_rxrpc_s; 1094ca7fb100SDavid Howells 1095ca7fb100SDavid Howells int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int); 1096ca7fb100SDavid Howells 1097ca7fb100SDavid Howells /* 10980d81a51aSDavid Howells * skbuff.c 10990d81a51aSDavid Howells */ 1100d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 11010d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 110271f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 110371f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1104d0d5c0cdSDavid Howells void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 110571f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 110671f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1107df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 11080d81a51aSDavid Howells 11090d81a51aSDavid Howells /* 1110b0154246SDavid Howells * stats.c 1111b0154246SDavid Howells */ 1112b0154246SDavid Howells int rxrpc_stats_show(struct seq_file *seq, void *v); 1113b0154246SDavid Howells int rxrpc_stats_clear(struct file *file, char *buf, size_t size); 1114b0154246SDavid Howells 1115b0154246SDavid Howells #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s) 1116b0154246SDavid Howells #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s) 1117b0154246SDavid Howells 1118b0154246SDavid Howells /* 11195873c083SDavid Howells * sysctl.c 11205873c083SDavid Howells */ 11215873c083SDavid Howells #ifdef CONFIG_SYSCTL 11225873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11235873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11245873c083SDavid Howells #else 11255873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11265873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11275873c083SDavid Howells #endif 11285873c083SDavid Howells 11295873c083SDavid Howells /* 1130be6e6707SDavid Howells * utils.c 1131be6e6707SDavid Howells */ 11325a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1133be6e6707SDavid Howells 1134248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1135248f219cSDavid Howells { 1136248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1137248f219cSDavid Howells } 1138248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1139248f219cSDavid Howells { 1140248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1141248f219cSDavid Howells } 1142248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1143248f219cSDavid Howells { 1144248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1145248f219cSDavid Howells } 1146248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1147248f219cSDavid Howells { 1148248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1149248f219cSDavid Howells } 1150248f219cSDavid Howells 1151be6e6707SDavid Howells /* 115217926a79SDavid Howells * debug tracing 115317926a79SDavid Howells */ 115495c96174SEric Dumazet extern unsigned int rxrpc_debug; 115517926a79SDavid Howells 115617926a79SDavid Howells #define dbgprintk(FMT,...) \ 11579f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 115817926a79SDavid Howells 11590dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11600dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 116117926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 116217926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 116317926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 116417926a79SDavid Howells 116517926a79SDavid Howells 116617926a79SDavid Howells #if defined(__KDEBUG) 116717926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 116817926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 116917926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 117017926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 117117926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 117217926a79SDavid Howells 117317926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 117417926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 117517926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 117617926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 117717926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 117817926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 117917926a79SDavid Howells 118017926a79SDavid Howells #define _enter(FMT,...) \ 118117926a79SDavid Howells do { \ 118217926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 118317926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 118417926a79SDavid Howells } while (0) 118517926a79SDavid Howells 118617926a79SDavid Howells #define _leave(FMT,...) \ 118717926a79SDavid Howells do { \ 118817926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 118917926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 119017926a79SDavid Howells } while (0) 119117926a79SDavid Howells 119217926a79SDavid Howells #define _debug(FMT,...) \ 119317926a79SDavid Howells do { \ 119417926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 119517926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 119617926a79SDavid Howells } while (0) 119717926a79SDavid Howells 119817926a79SDavid Howells #define _proto(FMT,...) \ 119917926a79SDavid Howells do { \ 120017926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 120117926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 120217926a79SDavid Howells } while (0) 120317926a79SDavid Howells 120417926a79SDavid Howells #define _net(FMT,...) \ 120517926a79SDavid Howells do { \ 120617926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 120717926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 120817926a79SDavid Howells } while (0) 120917926a79SDavid Howells 121017926a79SDavid Howells #else 121112fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 121212fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 121312fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 121412fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 121512fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 121617926a79SDavid Howells #endif 121717926a79SDavid Howells 121817926a79SDavid Howells /* 121917926a79SDavid Howells * debug assertion checking 122017926a79SDavid Howells */ 122117926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 122217926a79SDavid Howells 122317926a79SDavid Howells #define ASSERT(X) \ 122417926a79SDavid Howells do { \ 122517926a79SDavid Howells if (unlikely(!(X))) { \ 12269b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 122717926a79SDavid Howells BUG(); \ 122817926a79SDavid Howells } \ 122917926a79SDavid Howells } while (0) 123017926a79SDavid Howells 123117926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 123217926a79SDavid Howells do { \ 1233cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1234cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12359b6d5398SJoe Perches if (unlikely(!(_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 #define ASSERTIF(C, X) \ 124417926a79SDavid Howells do { \ 124517926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12469b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 124717926a79SDavid Howells BUG(); \ 124817926a79SDavid Howells } \ 124917926a79SDavid Howells } while (0) 125017926a79SDavid Howells 125117926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 125217926a79SDavid Howells do { \ 1253cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1254cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12559b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12569b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1257cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1258cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 125917926a79SDavid Howells BUG(); \ 126017926a79SDavid Howells } \ 126117926a79SDavid Howells } while (0) 126217926a79SDavid Howells 126317926a79SDavid Howells #else 126417926a79SDavid Howells 126517926a79SDavid Howells #define ASSERT(X) \ 126617926a79SDavid Howells do { \ 126717926a79SDavid Howells } while (0) 126817926a79SDavid Howells 126917926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 127017926a79SDavid Howells do { \ 127117926a79SDavid Howells } while (0) 127217926a79SDavid Howells 127317926a79SDavid Howells #define ASSERTIF(C, X) \ 127417926a79SDavid Howells do { \ 127517926a79SDavid Howells } while (0) 127617926a79SDavid Howells 127717926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 127817926a79SDavid Howells do { \ 127917926a79SDavid Howells } while (0) 128017926a79SDavid Howells 128117926a79SDavid Howells #endif /* __KDEBUGALL */ 1282