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> 15ddc6c70fSDavid Howells #include "protocol.h" 1617926a79SDavid Howells 1717926a79SDavid Howells #if 0 1817926a79SDavid Howells #define CHECK_SLAB_OKAY(X) \ 1917926a79SDavid Howells BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ 2017926a79SDavid Howells (POISON_FREE << 8 | POISON_FREE)) 2117926a79SDavid Howells #else 2217926a79SDavid Howells #define CHECK_SLAB_OKAY(X) do {} while (0) 2317926a79SDavid Howells #endif 2417926a79SDavid Howells 2517926a79SDavid Howells #define FCRYPT_BSIZE 8 2617926a79SDavid Howells struct rxrpc_crypt { 2717926a79SDavid Howells union { 2817926a79SDavid Howells u8 x[FCRYPT_BSIZE]; 2991e916cfSAl Viro __be32 n[2]; 3017926a79SDavid Howells }; 3117926a79SDavid Howells } __attribute__((aligned(8))); 3217926a79SDavid Howells 33651350d1SDavid Howells #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) 34651350d1SDavid Howells #define rxrpc_queue_delayed_work(WS,D) \ 35651350d1SDavid Howells queue_delayed_work(rxrpc_workqueue, (WS), (D)) 36651350d1SDavid Howells 37cc8feb8eSDavid Howells struct rxrpc_connection; 38cc8feb8eSDavid Howells 3917926a79SDavid Howells /* 40ece64fecSDavid Howells * Mark applied to socket buffers in skb->mark. skb->priority is used 41ece64fecSDavid Howells * to pass supplementary information. 42d001648eSDavid Howells */ 43d001648eSDavid Howells enum rxrpc_skb_mark { 44ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */ 45ece64fecSDavid Howells RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */ 46d001648eSDavid Howells }; 47d001648eSDavid Howells 48d001648eSDavid Howells /* 4917926a79SDavid Howells * sk_state for RxRPC sockets 5017926a79SDavid Howells */ 5117926a79SDavid Howells enum { 522341e077SDavid Howells RXRPC_UNBOUND = 0, 532341e077SDavid Howells RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ 5417926a79SDavid Howells RXRPC_CLIENT_BOUND, /* client local address bound */ 5517926a79SDavid Howells RXRPC_SERVER_BOUND, /* server local address bound */ 5628036f44SDavid Howells RXRPC_SERVER_BOUND2, /* second server local address bound */ 5717926a79SDavid Howells RXRPC_SERVER_LISTENING, /* server listening for connections */ 58210f0353SDavid Howells RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ 5917926a79SDavid Howells RXRPC_CLOSE, /* socket is being closed */ 6017926a79SDavid Howells }; 6117926a79SDavid Howells 6217926a79SDavid Howells /* 632baec2c3SDavid Howells * Per-network namespace data. 642baec2c3SDavid Howells */ 652baec2c3SDavid Howells struct rxrpc_net { 662baec2c3SDavid Howells struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ 672baec2c3SDavid Howells u32 epoch; /* Local epoch for detecting local-end reset */ 682baec2c3SDavid Howells struct list_head calls; /* List of calls active in this namespace */ 692baec2c3SDavid Howells rwlock_t call_lock; /* Lock for ->calls */ 70d3be4d24SDavid Howells atomic_t nr_calls; /* Count of allocated calls */ 712baec2c3SDavid Howells 7231f5f9a1SDavid Howells atomic_t nr_conns; 732baec2c3SDavid Howells struct list_head conn_proc_list; /* List of conns in this namespace for proc */ 742baec2c3SDavid Howells struct list_head service_conns; /* Service conns in this namespace */ 752baec2c3SDavid Howells rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ 763d18cbb7SDavid Howells struct work_struct service_conn_reaper; 773d18cbb7SDavid Howells struct timer_list service_conn_reap_timer; 782baec2c3SDavid Howells 792baec2c3SDavid Howells unsigned int nr_client_conns; 802baec2c3SDavid Howells unsigned int nr_active_client_conns; 812baec2c3SDavid Howells bool kill_all_client_conns; 82f859ab61SDavid Howells bool live; 832baec2c3SDavid Howells spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ 842baec2c3SDavid Howells spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ 852baec2c3SDavid Howells struct list_head waiting_client_conns; 862baec2c3SDavid Howells struct list_head active_client_conns; 872baec2c3SDavid Howells struct list_head idle_client_conns; 883d18cbb7SDavid Howells struct work_struct client_conn_reaper; 893d18cbb7SDavid Howells struct timer_list client_conn_reap_timer; 902baec2c3SDavid Howells 912baec2c3SDavid Howells struct list_head local_endpoints; 922baec2c3SDavid Howells struct mutex local_mutex; /* Lock for ->local_endpoints */ 932baec2c3SDavid Howells 942baec2c3SDavid Howells DECLARE_HASHTABLE (peer_hash, 10); 95ace45becSDavid Howells spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ 96ace45becSDavid Howells 97ace45becSDavid Howells #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ 98ace45becSDavid Howells u8 peer_keepalive_cursor; 99330bdcfaSDavid Howells time64_t peer_keepalive_base; 100330bdcfaSDavid Howells struct list_head peer_keepalive[32]; 101330bdcfaSDavid Howells struct list_head peer_keepalive_new; 102ace45becSDavid Howells struct timer_list peer_keepalive_timer; 103ace45becSDavid Howells struct work_struct peer_keepalive_work; 1042baec2c3SDavid Howells }; 1052baec2c3SDavid Howells 1062baec2c3SDavid Howells /* 10700e90712SDavid Howells * Service backlog preallocation. 10800e90712SDavid Howells * 10900e90712SDavid Howells * This contains circular buffers of preallocated peers, connections and calls 11000e90712SDavid Howells * for incoming service calls and their head and tail pointers. This allows 11100e90712SDavid Howells * calls to be set up in the data_ready handler, thereby avoiding the need to 11200e90712SDavid Howells * shuffle packets around so much. 11300e90712SDavid Howells */ 11400e90712SDavid Howells struct rxrpc_backlog { 11500e90712SDavid Howells unsigned short peer_backlog_head; 11600e90712SDavid Howells unsigned short peer_backlog_tail; 11700e90712SDavid Howells unsigned short conn_backlog_head; 11800e90712SDavid Howells unsigned short conn_backlog_tail; 11900e90712SDavid Howells unsigned short call_backlog_head; 12000e90712SDavid Howells unsigned short call_backlog_tail; 12100e90712SDavid Howells #define RXRPC_BACKLOG_MAX 32 12200e90712SDavid Howells struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; 12300e90712SDavid Howells struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; 12400e90712SDavid Howells struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; 12500e90712SDavid Howells }; 12600e90712SDavid Howells 12700e90712SDavid Howells /* 12817926a79SDavid Howells * RxRPC socket definition 12917926a79SDavid Howells */ 13017926a79SDavid Howells struct rxrpc_sock { 13117926a79SDavid Howells /* WARNING: sk has to be the first member */ 13217926a79SDavid Howells struct sock sk; 133d001648eSDavid Howells rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ 13400e90712SDavid Howells rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ 13517926a79SDavid Howells struct rxrpc_local *local; /* local endpoint */ 13600e90712SDavid Howells struct rxrpc_backlog *backlog; /* Preallocation for services */ 137248f219cSDavid Howells spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ 138248f219cSDavid Howells struct list_head sock_calls; /* List of calls owned by this socket */ 139248f219cSDavid Howells struct list_head to_be_accepted; /* calls awaiting acceptance */ 140248f219cSDavid Howells struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ 141248f219cSDavid Howells rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ 14217926a79SDavid Howells struct key *key; /* security for this socket */ 14317926a79SDavid Howells struct key *securities; /* list of server security descriptors */ 14400e90712SDavid Howells struct rb_root calls; /* User ID -> call mapping */ 14517926a79SDavid Howells unsigned long flags; 1462341e077SDavid Howells #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ 14717926a79SDavid Howells rwlock_t call_lock; /* lock for calls */ 14817926a79SDavid Howells u32 min_sec_level; /* minimum security level */ 14917926a79SDavid Howells #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT 150cc8feb8eSDavid Howells bool exclusive; /* Exclusive connection for a client socket */ 15128036f44SDavid Howells u16 second_service; /* Additional service bound to the endpoint */ 1524722974dSDavid Howells struct { 1534722974dSDavid Howells /* Service upgrade information */ 1544722974dSDavid Howells u16 from; /* Service ID to upgrade (if not 0) */ 1554722974dSDavid Howells u16 to; /* service ID to upgrade to */ 1564722974dSDavid Howells } service_upgrade; 157cc8feb8eSDavid Howells sa_family_t family; /* Protocol family created with */ 1584722974dSDavid Howells struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ 1592341e077SDavid Howells struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ 16017926a79SDavid Howells }; 16117926a79SDavid Howells 16217926a79SDavid Howells #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) 16317926a79SDavid Howells 16417926a79SDavid Howells /* 1650d12f8a4SDavid Howells * CPU-byteorder normalised Rx packet header. 1660d12f8a4SDavid Howells */ 1670d12f8a4SDavid Howells struct rxrpc_host_header { 1680d12f8a4SDavid Howells u32 epoch; /* client boot timestamp */ 1690d12f8a4SDavid Howells u32 cid; /* connection and channel ID */ 1700d12f8a4SDavid Howells u32 callNumber; /* call ID (0 for connection-level packets) */ 1710d12f8a4SDavid Howells u32 seq; /* sequence number of pkt in call stream */ 1720d12f8a4SDavid Howells u32 serial; /* serial number of pkt sent to network */ 1730d12f8a4SDavid Howells u8 type; /* packet type */ 1740d12f8a4SDavid Howells u8 flags; /* packet flags */ 1750d12f8a4SDavid Howells u8 userStatus; /* app-layer defined status */ 1760d12f8a4SDavid Howells u8 securityIndex; /* security protocol ID */ 1770d12f8a4SDavid Howells union { 1780d12f8a4SDavid Howells u16 _rsvd; /* reserved */ 1790d12f8a4SDavid Howells u16 cksum; /* kerberos security checksum */ 1800d12f8a4SDavid Howells }; 1810d12f8a4SDavid Howells u16 serviceId; /* service ID */ 1820d12f8a4SDavid Howells } __packed; 1830d12f8a4SDavid Howells 1840d12f8a4SDavid Howells /* 18517926a79SDavid Howells * RxRPC socket buffer private variables 18617926a79SDavid Howells * - max 48 bytes (struct sk_buff::cb) 18717926a79SDavid Howells */ 18817926a79SDavid Howells struct rxrpc_skb_priv { 189987db9f7SDavid Howells atomic_t nr_ring_pins; /* Number of rxtx ring pins */ 190c3c9e3dfSDavid Howells u8 nr_subpackets; /* Number of subpackets */ 191c3c9e3dfSDavid Howells u8 rx_flags; /* Received packet flags */ 192c3c9e3dfSDavid Howells #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */ 193b311e684SDavid Howells #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */ 19417926a79SDavid Howells union { 19517926a79SDavid Howells int remain; /* amount of space remaining for next write */ 196c3c9e3dfSDavid Howells 197c3c9e3dfSDavid Howells /* List of requested ACKs on subpackets */ 198c3c9e3dfSDavid Howells unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) / 199c3c9e3dfSDavid Howells BITS_PER_LONG]; 20017926a79SDavid Howells }; 20117926a79SDavid Howells 2020d12f8a4SDavid Howells struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ 20317926a79SDavid Howells }; 20417926a79SDavid Howells 20517926a79SDavid Howells #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) 20617926a79SDavid Howells 20717926a79SDavid Howells /* 20817926a79SDavid Howells * RxRPC security module interface 20917926a79SDavid Howells */ 21017926a79SDavid Howells struct rxrpc_security { 21117926a79SDavid Howells const char *name; /* name of this service */ 21217926a79SDavid Howells u8 security_index; /* security type provided */ 213063c60d3SDavid Howells u32 no_key_abort; /* Abort code indicating no key */ 21417926a79SDavid Howells 215648af7fcSDavid Howells /* Initialise a security service */ 216648af7fcSDavid Howells int (*init)(void); 217648af7fcSDavid Howells 218648af7fcSDavid Howells /* Clean up a security service */ 219648af7fcSDavid Howells void (*exit)(void); 220648af7fcSDavid Howells 22117926a79SDavid Howells /* initialise a connection's security */ 22217926a79SDavid Howells int (*init_connection_security)(struct rxrpc_connection *); 22317926a79SDavid Howells 22417926a79SDavid Howells /* prime a connection's packet security */ 225a263629dSHerbert Xu int (*prime_packet_security)(struct rxrpc_connection *); 22617926a79SDavid Howells 22717926a79SDavid Howells /* impose security on a packet */ 228a263629dSHerbert Xu int (*secure_packet)(struct rxrpc_call *, 22917926a79SDavid Howells struct sk_buff *, 23017926a79SDavid Howells size_t, 23117926a79SDavid Howells void *); 23217926a79SDavid Howells 23317926a79SDavid Howells /* verify the security on a received packet */ 2345a42976dSDavid Howells int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, 235248f219cSDavid Howells unsigned int, unsigned int, rxrpc_seq_t, u16); 236248f219cSDavid Howells 2371db88c53SDavid Howells /* Free crypto request on a call */ 2381db88c53SDavid Howells void (*free_call_crypto)(struct rxrpc_call *); 2391db88c53SDavid Howells 240248f219cSDavid Howells /* Locate the data in a received packet that has been verified. */ 241248f219cSDavid Howells void (*locate_data)(struct rxrpc_call *, struct sk_buff *, 242248f219cSDavid Howells unsigned int *, unsigned int *); 24317926a79SDavid Howells 24417926a79SDavid Howells /* issue a challenge */ 24517926a79SDavid Howells int (*issue_challenge)(struct rxrpc_connection *); 24617926a79SDavid Howells 24717926a79SDavid Howells /* respond to a challenge */ 24817926a79SDavid Howells int (*respond_to_challenge)(struct rxrpc_connection *, 24917926a79SDavid Howells struct sk_buff *, 25017926a79SDavid Howells u32 *); 25117926a79SDavid Howells 25217926a79SDavid Howells /* verify a response */ 25317926a79SDavid Howells int (*verify_response)(struct rxrpc_connection *, 25417926a79SDavid Howells struct sk_buff *, 25517926a79SDavid Howells u32 *); 25617926a79SDavid Howells 25717926a79SDavid Howells /* clear connection security */ 25817926a79SDavid Howells void (*clear)(struct rxrpc_connection *); 25917926a79SDavid Howells }; 26017926a79SDavid Howells 26117926a79SDavid Howells /* 2624f95dd78SDavid Howells * RxRPC local transport endpoint description 2634f95dd78SDavid Howells * - owned by a single AF_RXRPC socket 2644f95dd78SDavid Howells * - pointed to by transport socket struct sk_user_data 26517926a79SDavid Howells */ 26617926a79SDavid Howells struct rxrpc_local { 2674f95dd78SDavid Howells struct rcu_head rcu; 268730c5fd4SDavid Howells atomic_t active_users; /* Number of users of the local endpoint */ 269730c5fd4SDavid Howells atomic_t usage; /* Number of references to the structure */ 2702baec2c3SDavid Howells struct rxrpc_net *rxnet; /* The network ns in which this resides */ 2714f95dd78SDavid Howells struct list_head link; 27217926a79SDavid Howells struct socket *socket; /* my UDP socket */ 2734f95dd78SDavid Howells struct work_struct processor; 2741e9e5c95SDavid Howells struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ 27517926a79SDavid Howells struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ 27617926a79SDavid Howells struct sk_buff_head reject_queue; /* packets awaiting rejection */ 27744ba0698SDavid Howells struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ 278999b69f8SDavid Howells struct rb_root client_conns; /* Client connections by socket params */ 279999b69f8SDavid Howells spinlock_t client_conns_lock; /* Lock for client_conns */ 28017926a79SDavid Howells spinlock_t lock; /* access lock */ 28117926a79SDavid Howells rwlock_t services_lock; /* lock for services list */ 28217926a79SDavid Howells int debug_id; /* debug ID for printks */ 2834f95dd78SDavid Howells bool dead; 284f859ab61SDavid Howells bool service_closed; /* Service socket closed */ 28517926a79SDavid Howells struct sockaddr_rxrpc srx; /* local address */ 28617926a79SDavid Howells }; 28717926a79SDavid Howells 28817926a79SDavid Howells /* 28917926a79SDavid Howells * RxRPC remote transport endpoint definition 290be6e6707SDavid Howells * - matched by local endpoint, remote port, address and protocol type 29117926a79SDavid Howells */ 29217926a79SDavid Howells struct rxrpc_peer { 293be6e6707SDavid Howells struct rcu_head rcu; /* This must be first */ 294be6e6707SDavid Howells atomic_t usage; 295be6e6707SDavid Howells unsigned long hash_key; 296be6e6707SDavid Howells struct hlist_node hash_link; 297be6e6707SDavid Howells struct rxrpc_local *local; 298f66d7490SDavid Howells struct hlist_head error_targets; /* targets for net error distribution */ 299aa390bbeSDavid Howells struct rb_root service_conns; /* Service connections */ 300330bdcfaSDavid Howells struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ 301ace45becSDavid Howells time64_t last_tx_at; /* Last time packet sent here */ 3028496af50SDavid Howells seqlock_t service_conn_lock; 30317926a79SDavid Howells spinlock_t lock; /* access lock */ 30495c96174SEric Dumazet unsigned int if_mtu; /* interface MTU for this peer */ 30595c96174SEric Dumazet unsigned int mtu; /* network MTU for this peer */ 30695c96174SEric Dumazet unsigned int maxdata; /* data size (MTU - hdrsize) */ 30717926a79SDavid Howells unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ 30817926a79SDavid Howells int debug_id; /* debug ID for printks */ 30917926a79SDavid Howells struct sockaddr_rxrpc srx; /* remote address */ 31017926a79SDavid Howells 31117926a79SDavid Howells /* calculated RTT cache */ 31217926a79SDavid Howells #define RXRPC_RTT_CACHE_SIZE 32 313c1e15b49SDavid Howells spinlock_t rtt_input_lock; /* RTT lock for input routine */ 3140d4b103cSDavid Howells ktime_t rtt_last_req; /* Time of last RTT request */ 315c410bf01SDavid Howells unsigned int rtt_count; /* Number of samples we've got */ 316c410bf01SDavid Howells 317c410bf01SDavid Howells u32 srtt_us; /* smoothed round trip time << 3 in usecs */ 318c410bf01SDavid Howells u32 mdev_us; /* medium deviation */ 319c410bf01SDavid Howells u32 mdev_max_us; /* maximal mdev for the last rtt period */ 320c410bf01SDavid Howells u32 rttvar_us; /* smoothed mdev_max */ 321c410bf01SDavid Howells u32 rto_j; /* Retransmission timeout in jiffies */ 322c410bf01SDavid Howells u8 backoff; /* Backoff timeout */ 323f7aec129SDavid Howells 324f7aec129SDavid Howells u8 cong_cwnd; /* Congestion window size */ 32517926a79SDavid Howells }; 32617926a79SDavid Howells 32717926a79SDavid Howells /* 32819ffa01cSDavid Howells * Keys for matching a connection. 32919ffa01cSDavid Howells */ 33019ffa01cSDavid Howells struct rxrpc_conn_proto { 331e8d70ce1SDavid Howells union { 332e8d70ce1SDavid Howells struct { 33319ffa01cSDavid Howells u32 epoch; /* epoch of this connection */ 33419ffa01cSDavid Howells u32 cid; /* connection ID */ 335e8d70ce1SDavid Howells }; 336e8d70ce1SDavid Howells u64 index_key; 33719ffa01cSDavid Howells }; 33819ffa01cSDavid Howells }; 33919ffa01cSDavid Howells 34019ffa01cSDavid Howells struct rxrpc_conn_parameters { 34119ffa01cSDavid Howells struct rxrpc_local *local; /* Representation of local endpoint */ 34219ffa01cSDavid Howells struct rxrpc_peer *peer; /* Remote endpoint */ 34319ffa01cSDavid Howells struct key *key; /* Security details */ 34419ffa01cSDavid Howells bool exclusive; /* T if conn is exclusive */ 3454e255721SDavid Howells bool upgrade; /* T if service ID can be upgraded */ 34619ffa01cSDavid Howells u16 service_id; /* Service ID for this connection */ 34719ffa01cSDavid Howells u32 security_level; /* Security level selected */ 34819ffa01cSDavid Howells }; 34919ffa01cSDavid Howells 35019ffa01cSDavid Howells /* 351bba304dbSDavid Howells * Bits in the connection flags. 352bba304dbSDavid Howells */ 353bba304dbSDavid Howells enum rxrpc_conn_flag { 354bba304dbSDavid Howells RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ 355001c1122SDavid Howells RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ 356001c1122SDavid Howells RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ 35745025bceSDavid Howells RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ 35845025bceSDavid Howells RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ 35945025bceSDavid Howells RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ 3604e255721SDavid Howells RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ 3613136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ 3623136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ 3633136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ 3643136ef49SDavid Howells RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ 365bba304dbSDavid Howells }; 366bba304dbSDavid Howells 3673136ef49SDavid Howells #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ 3683136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_1) | \ 3693136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_2) | \ 3703136ef49SDavid Howells (1UL << RXRPC_CONN_FINAL_ACK_3)) 3713136ef49SDavid Howells 372bba304dbSDavid Howells /* 373bba304dbSDavid Howells * Events that can be raised upon a connection. 374bba304dbSDavid Howells */ 375bba304dbSDavid Howells enum rxrpc_conn_event { 376bba304dbSDavid Howells RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ 377bba304dbSDavid Howells }; 378bba304dbSDavid Howells 379bba304dbSDavid Howells /* 38045025bceSDavid Howells * The connection cache state. 38145025bceSDavid Howells */ 38245025bceSDavid Howells enum rxrpc_conn_cache_state { 38345025bceSDavid Howells RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ 38445025bceSDavid Howells RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ 38545025bceSDavid Howells RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ 3864e255721SDavid Howells RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ 38745025bceSDavid Howells RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ 38845025bceSDavid Howells RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ 389363deeabSDavid Howells RXRPC_CONN__NR_CACHE_STATES 39045025bceSDavid Howells }; 39145025bceSDavid Howells 39245025bceSDavid Howells /* 393bba304dbSDavid Howells * The connection protocol state. 394bba304dbSDavid Howells */ 395bba304dbSDavid Howells enum rxrpc_conn_proto_state { 396bba304dbSDavid Howells RXRPC_CONN_UNUSED, /* Connection not yet attempted */ 397bba304dbSDavid Howells RXRPC_CONN_CLIENT, /* Client connection */ 39800e90712SDavid Howells RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ 399bba304dbSDavid Howells RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ 400bba304dbSDavid Howells RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ 401bba304dbSDavid Howells RXRPC_CONN_SERVICE, /* Service secured connection */ 402bba304dbSDavid Howells RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ 403bba304dbSDavid Howells RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ 404bba304dbSDavid Howells RXRPC_CONN__NR_STATES 405bba304dbSDavid Howells }; 406bba304dbSDavid Howells 407bba304dbSDavid Howells /* 40817926a79SDavid Howells * RxRPC connection definition 409aa390bbeSDavid Howells * - matched by { local, peer, epoch, conn_id, direction } 41017926a79SDavid Howells * - each connection can only handle four simultaneous calls 41117926a79SDavid Howells */ 41217926a79SDavid Howells struct rxrpc_connection { 41319ffa01cSDavid Howells struct rxrpc_conn_proto proto; 41419ffa01cSDavid Howells struct rxrpc_conn_parameters params; 41519ffa01cSDavid Howells 41645025bceSDavid Howells atomic_t usage; 41745025bceSDavid Howells struct rcu_head rcu; 41845025bceSDavid Howells struct list_head cache_link; 419a1399f8bSDavid Howells 42045025bceSDavid Howells spinlock_t channel_lock; 42145025bceSDavid Howells unsigned char active_chans; /* Mask of active channels */ 42245025bceSDavid Howells #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) 42345025bceSDavid Howells struct list_head waiting_calls; /* Calls waiting for channels */ 424a1399f8bSDavid Howells struct rxrpc_channel { 4253136ef49SDavid Howells unsigned long final_ack_at; /* Time at which to issue final ACK */ 426a1399f8bSDavid Howells struct rxrpc_call __rcu *call; /* Active call */ 4274764c0daSDavid Howells unsigned int call_debug_id; /* call->debug_id */ 428a1399f8bSDavid Howells u32 call_id; /* ID of current call */ 429a1399f8bSDavid Howells u32 call_counter; /* Call ID counter */ 430a1399f8bSDavid Howells u32 last_call; /* ID of last call */ 43118bfeba5SDavid Howells u8 last_type; /* Type of last packet */ 43218bfeba5SDavid Howells union { 43318bfeba5SDavid Howells u32 last_seq; 43418bfeba5SDavid Howells u32 last_abort; 43518bfeba5SDavid Howells }; 436a1399f8bSDavid Howells } channels[RXRPC_MAXCALLS]; 437999b69f8SDavid Howells 4383136ef49SDavid Howells struct timer_list timer; /* Conn event timer */ 43917926a79SDavid Howells struct work_struct processor; /* connection event processor */ 440999b69f8SDavid Howells union { 441999b69f8SDavid Howells struct rb_node client_node; /* Node in local->client_conns */ 442aa390bbeSDavid Howells struct rb_node service_node; /* Node in peer->service_conns */ 443999b69f8SDavid Howells }; 4444d028b2cSDavid Howells struct list_head proc_link; /* link in procfs list */ 44517926a79SDavid Howells struct list_head link; /* link in master connection list */ 44617926a79SDavid Howells struct sk_buff_head rx_queue; /* received conn-level packets */ 447648af7fcSDavid Howells const struct rxrpc_security *security; /* applied security module */ 44817926a79SDavid Howells struct key *server_key; /* security for this service */ 44969d826faSKees Cook struct crypto_sync_skcipher *cipher; /* encryption handle */ 45017926a79SDavid Howells struct rxrpc_crypt csum_iv; /* packet checksum base */ 4514a3388c8SDavid Howells unsigned long flags; 45217926a79SDavid Howells unsigned long events; 453f51b4480SDavid Howells unsigned long idle_timestamp; /* Time at which last became idle */ 45417926a79SDavid Howells spinlock_t state_lock; /* state-change lock */ 455cf13258fSDavid Howells enum rxrpc_conn_cache_state cache_state; 456cf13258fSDavid Howells enum rxrpc_conn_proto_state state; /* current state of connection */ 45764753092SDavid Howells u32 abort_code; /* Abort code of connection abort */ 45817926a79SDavid Howells int debug_id; /* debug ID for printks */ 45917926a79SDavid Howells atomic_t serial; /* packet serial number counter */ 460563ea7d5SDavid Howells unsigned int hi_serial; /* highest serial number received */ 46117926a79SDavid Howells u32 security_nonce; /* response re-use preventer */ 462c1e15b49SDavid Howells u32 service_id; /* Service ID, possibly upgraded */ 4635a924b89SDavid Howells u8 size_align; /* data size alignment (for security) */ 4645a924b89SDavid Howells u8 security_size; /* security header size */ 46517926a79SDavid Howells u8 security_ix; /* security type */ 46617926a79SDavid Howells u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ 46764753092SDavid Howells short error; /* Local error code */ 46817926a79SDavid Howells }; 46917926a79SDavid Howells 470dc71db34SDavid Howells static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp) 471dc71db34SDavid Howells { 472dc71db34SDavid Howells return sp->hdr.flags & RXRPC_CLIENT_INITIATED; 473dc71db34SDavid Howells } 474dc71db34SDavid Howells 475dc71db34SDavid Howells static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp) 476dc71db34SDavid Howells { 477dc71db34SDavid Howells return !rxrpc_to_server(sp); 478dc71db34SDavid Howells } 479dc71db34SDavid Howells 48017926a79SDavid Howells /* 4815b8848d1SDavid Howells * Flags in call->flags. 4825b8848d1SDavid Howells */ 4835b8848d1SDavid Howells enum rxrpc_call_flag { 4845b8848d1SDavid Howells RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ 4855b8848d1SDavid Howells RXRPC_CALL_HAS_USERID, /* has a user ID attached */ 486dabe5a79SDavid Howells RXRPC_CALL_IS_SERVICE, /* Call is service call */ 48745025bceSDavid Howells RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ 488248f219cSDavid Howells RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ 489248f219cSDavid Howells RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ 490a5af7e1fSDavid Howells RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ 4918e83134dSDavid Howells RXRPC_CALL_PINGING, /* Ping in process */ 49257494343SDavid Howells RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ 493c54e43d7SDavid Howells RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ 4941a025028SDavid Howells RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ 495d0b35a42SDavid Howells RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */ 4965273a191SDavid Howells RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ 4975b8848d1SDavid Howells }; 4985b8848d1SDavid Howells 4995b8848d1SDavid Howells /* 5005b8848d1SDavid Howells * Events that can be raised on a call. 5015b8848d1SDavid Howells */ 5025b8848d1SDavid Howells enum rxrpc_call_event { 5034c198ad1SDavid Howells RXRPC_CALL_EV_ACK, /* need to generate ACK */ 5044c198ad1SDavid Howells RXRPC_CALL_EV_ABORT, /* need to generate abort */ 5054c198ad1SDavid Howells RXRPC_CALL_EV_RESEND, /* Tx resend required */ 506a5af7e1fSDavid Howells RXRPC_CALL_EV_PING, /* Ping send required */ 507a158bdd3SDavid Howells RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ 508bd1fdf8cSDavid Howells RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ 5095b8848d1SDavid Howells }; 5105b8848d1SDavid Howells 5115b8848d1SDavid Howells /* 5125b8848d1SDavid Howells * The states that a call can be in. 5135b8848d1SDavid Howells */ 5145b8848d1SDavid Howells enum rxrpc_call_state { 515999b69f8SDavid Howells RXRPC_CALL_UNINITIALISED, 516999b69f8SDavid Howells RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ 5175b8848d1SDavid Howells RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ 5185b8848d1SDavid Howells RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ 5195b8848d1SDavid Howells RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ 52000e90712SDavid Howells RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ 5215b8848d1SDavid Howells RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ 5225b8848d1SDavid Howells RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ 5235b8848d1SDavid Howells RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ 5245b8848d1SDavid Howells RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ 5255b8848d1SDavid Howells RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ 5265b8848d1SDavid Howells RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ 527f5c17aaeSDavid Howells RXRPC_CALL_COMPLETE, /* - call complete */ 528f5c17aaeSDavid Howells NR__RXRPC_CALL_STATES 529f5c17aaeSDavid Howells }; 530f5c17aaeSDavid Howells 531f5c17aaeSDavid Howells /* 532e122d845SDavid Howells * Call completion condition (state == RXRPC_CALL_COMPLETE). 533e122d845SDavid Howells */ 534e122d845SDavid Howells enum rxrpc_call_completion { 535e122d845SDavid Howells RXRPC_CALL_SUCCEEDED, /* - Normal termination */ 536e122d845SDavid Howells RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ 537e122d845SDavid Howells RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ 538e122d845SDavid Howells RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ 539e122d845SDavid Howells RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ 540e122d845SDavid Howells NR__RXRPC_CALL_COMPLETIONS 541e122d845SDavid Howells }; 542e122d845SDavid Howells 543e122d845SDavid Howells /* 54457494343SDavid Howells * Call Tx congestion management modes. 54557494343SDavid Howells */ 54657494343SDavid Howells enum rxrpc_congest_mode { 54757494343SDavid Howells RXRPC_CALL_SLOW_START, 54857494343SDavid Howells RXRPC_CALL_CONGEST_AVOIDANCE, 54957494343SDavid Howells RXRPC_CALL_PACKET_LOSS, 55057494343SDavid Howells RXRPC_CALL_FAST_RETRANSMIT, 55157494343SDavid Howells NR__RXRPC_CONGEST_MODES 55257494343SDavid Howells }; 55357494343SDavid Howells 55457494343SDavid Howells /* 55517926a79SDavid Howells * RxRPC call definition 55617926a79SDavid Howells * - matched by { connection, call_id } 55717926a79SDavid Howells */ 55817926a79SDavid Howells struct rxrpc_call { 559dee46364SDavid Howells struct rcu_head rcu; 56017926a79SDavid Howells struct rxrpc_connection *conn; /* connection carrying call */ 561df5d8bf7SDavid Howells struct rxrpc_peer *peer; /* Peer record for remote address */ 5628d94aa38SDavid Howells struct rxrpc_sock __rcu *socket; /* socket responsible */ 563d3be4d24SDavid Howells struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ 56491fcfbe8SDavid Howells const struct rxrpc_security *security; /* applied security module */ 565540b1c48SDavid Howells struct mutex user_mutex; /* User access mutex */ 566a158bdd3SDavid Howells unsigned long ack_at; /* When deferred ACK needs to happen */ 567bd1fdf8cSDavid Howells unsigned long ack_lost_at; /* When ACK is figured as lost */ 568a158bdd3SDavid Howells unsigned long resend_at; /* When next resend needs to happen */ 569a158bdd3SDavid Howells unsigned long ping_at; /* When next to send a ping */ 570415f44e4SDavid Howells unsigned long keepalive_at; /* When next to send a keepalive ping */ 571a158bdd3SDavid Howells unsigned long expect_rx_by; /* When we expect to get a packet by */ 572a158bdd3SDavid Howells unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ 573a158bdd3SDavid Howells unsigned long expect_term_by; /* When we expect call termination by */ 574a158bdd3SDavid Howells u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ 575a158bdd3SDavid Howells u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ 5761db88c53SDavid Howells struct skcipher_request *cipher_req; /* Packet cipher request buffer */ 577248f219cSDavid Howells struct timer_list timer; /* Combined event timer */ 578248f219cSDavid Howells struct work_struct processor; /* Event processor */ 579d001648eSDavid Howells rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 58017926a79SDavid Howells struct list_head link; /* link in master call list */ 58145025bceSDavid Howells struct list_head chan_wait_link; /* Link in conn->waiting_calls */ 582f66d7490SDavid Howells struct hlist_node error_link; /* link in error distribution list */ 583248f219cSDavid Howells struct list_head accept_link; /* Link in rx->acceptq */ 584248f219cSDavid Howells struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ 585248f219cSDavid Howells struct list_head sock_link; /* Link in rx->sock_calls */ 586248f219cSDavid Howells struct rb_node sock_node; /* Node in rx->calls */ 58717926a79SDavid Howells struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 58845025bceSDavid Howells wait_queue_head_t waitq; /* Wait queue for channel or Tx */ 589e754eba6SDavid Howells s64 tx_total_len; /* Total length left to be transmitted (or -1) */ 590a263629dSHerbert Xu __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ 59117926a79SDavid Howells unsigned long user_call_ID; /* user-defined call ID */ 59217926a79SDavid Howells unsigned long flags; 59317926a79SDavid Howells unsigned long events; 59417926a79SDavid Howells spinlock_t lock; 59520acbd9aSDavid Howells spinlock_t notify_lock; /* Kernel notification lock */ 59617926a79SDavid Howells rwlock_t state_lock; /* lock for state transition */ 597f5c17aaeSDavid Howells u32 abort_code; /* Local/remote abort code */ 598f5c17aaeSDavid Howells int error; /* Local error incurred */ 599cf13258fSDavid Howells enum rxrpc_call_state state; /* current state of call */ 600cf13258fSDavid Howells enum rxrpc_call_completion completion; /* Call completion condition */ 60117926a79SDavid Howells atomic_t usage; 602dabe5a79SDavid Howells u16 service_id; /* service ID */ 603278ac0cdSDavid Howells u8 security_ix; /* Security type */ 604e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */ 605dabe5a79SDavid Howells u32 call_id; /* call ID on connection */ 606dabe5a79SDavid Howells u32 cid; /* connection ID plus channel index */ 607dabe5a79SDavid Howells int debug_id; /* debug ID for printks */ 6088e83134dSDavid Howells unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ 6098e83134dSDavid Howells unsigned short rx_pkt_len; /* Current recvmsg packet len */ 610f9c32435SDavid Howells bool rx_pkt_last; /* Current recvmsg packet is last */ 61117926a79SDavid Howells 612248f219cSDavid Howells /* Rx/Tx circular buffer, depending on phase. 613248f219cSDavid Howells * 614248f219cSDavid Howells * In the Rx phase, packets are annotated with 0 or the number of the 615248f219cSDavid Howells * segment of a jumbo packet each buffer refers to. There can be up to 616248f219cSDavid Howells * 47 segments in a maximum-size UDP packet. 617248f219cSDavid Howells * 618248f219cSDavid Howells * In the Tx phase, packets are annotated with which buffers have been 619248f219cSDavid Howells * acked. 62017926a79SDavid Howells */ 621248f219cSDavid Howells #define RXRPC_RXTX_BUFF_SIZE 64 622248f219cSDavid Howells #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) 6234075295aSDavid Howells #define RXRPC_INIT_RX_WINDOW_SIZE 63 624248f219cSDavid Howells struct sk_buff **rxtx_buffer; 625248f219cSDavid Howells u8 *rxtx_annotations; 626248f219cSDavid Howells #define RXRPC_TX_ANNO_ACK 0 627248f219cSDavid Howells #define RXRPC_TX_ANNO_UNACK 1 628248f219cSDavid Howells #define RXRPC_TX_ANNO_NAK 2 629248f219cSDavid Howells #define RXRPC_TX_ANNO_RETRANS 3 630f07373eaSDavid Howells #define RXRPC_TX_ANNO_MASK 0x03 63170790dbeSDavid Howells #define RXRPC_TX_ANNO_LAST 0x04 63270790dbeSDavid Howells #define RXRPC_TX_ANNO_RESENT 0x08 63370790dbeSDavid Howells 634e2de6c40SDavid Howells #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */ 635248f219cSDavid Howells #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ 636248f219cSDavid Howells rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but 637248f219cSDavid Howells * not hard-ACK'd packet follows this. 638248f219cSDavid Howells */ 639248f219cSDavid Howells rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ 640c7e86acfSDavid Howells u16 tx_backoff; /* Delay to insert due to Tx failure */ 64157494343SDavid Howells 64257494343SDavid Howells /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS 64357494343SDavid Howells * is fixed, we keep these numbers in terms of segments (ie. DATA 64457494343SDavid Howells * packets) rather than bytes. 64557494343SDavid Howells */ 64657494343SDavid Howells #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN 64757494343SDavid Howells u8 cong_cwnd; /* Congestion window size */ 64857494343SDavid Howells u8 cong_extra; /* Extra to send for congestion management */ 64957494343SDavid Howells u8 cong_ssthresh; /* Slow-start threshold */ 65057494343SDavid Howells enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ 65157494343SDavid Howells u8 cong_dup_acks; /* Count of ACKs showing missing packets */ 65257494343SDavid Howells u8 cong_cumul_acks; /* Cumulative ACK count */ 65357494343SDavid Howells ktime_t cong_tstamp; /* Last time cwnd was changed */ 65457494343SDavid Howells 655248f219cSDavid Howells rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not 656248f219cSDavid Howells * consumed packet follows this. 657248f219cSDavid Howells */ 658248f219cSDavid Howells rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ 659248f219cSDavid Howells rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ 6601a025028SDavid Howells rxrpc_serial_t rx_serial; /* Highest serial received for this call */ 661248f219cSDavid Howells u8 rx_winsize; /* Size of Rx window */ 662248f219cSDavid Howells u8 tx_winsize; /* Maximum size of Tx window */ 66371f3ca40SDavid Howells bool tx_phase; /* T if transmission phase, F if receive phase */ 66475e42126SDavid Howells u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ 66517926a79SDavid Howells 666c1e15b49SDavid Howells spinlock_t input_lock; /* Lock for packet input to this call */ 667c1e15b49SDavid Howells 66817926a79SDavid Howells /* receive-phase ACK management */ 6694e36a95eSDavid Howells u8 ackr_reason; /* reason to ACK */ 6700d12f8a4SDavid Howells rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ 6711a2391c3SJeffrey Altman rxrpc_serial_t ackr_first_seq; /* first sequence number received */ 672248f219cSDavid Howells rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ 673805b21b9SDavid Howells rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ 674805b21b9SDavid Howells rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ 675a5af7e1fSDavid Howells 676a5af7e1fSDavid Howells /* ping management */ 677a5af7e1fSDavid Howells rxrpc_serial_t ping_serial; /* Last ping sent */ 678a5af7e1fSDavid Howells ktime_t ping_time; /* Time last ping sent */ 67917926a79SDavid Howells 680248f219cSDavid Howells /* transmission-phase ACK management */ 68157494343SDavid Howells ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ 68231a1b989SDavid Howells rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ 683bd1fdf8cSDavid Howells rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ 684bd1fdf8cSDavid Howells rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ 68531a1b989SDavid Howells }; 68631a1b989SDavid Howells 68731a1b989SDavid Howells /* 68857494343SDavid Howells * Summary of a new ACK and the changes it made to the Tx buffer packet states. 68931a1b989SDavid Howells */ 69031a1b989SDavid Howells struct rxrpc_ack_summary { 69131a1b989SDavid Howells u8 ack_reason; 69231a1b989SDavid Howells u8 nr_acks; /* Number of ACKs in packet */ 69331a1b989SDavid Howells u8 nr_nacks; /* Number of NACKs in packet */ 69431a1b989SDavid Howells u8 nr_new_acks; /* Number of new ACKs in packet */ 69531a1b989SDavid Howells u8 nr_new_nacks; /* Number of new NACKs in packet */ 69631a1b989SDavid Howells u8 nr_rot_new_acks; /* Number of rotated new ACKs */ 69731a1b989SDavid Howells bool new_low_nack; /* T if new low NACK found */ 69857494343SDavid Howells bool retrans_timeo; /* T if reTx due to timeout happened */ 69957494343SDavid Howells u8 flight_size; /* Number of unreceived transmissions */ 70057494343SDavid Howells /* Place to stash values for tracing */ 70157494343SDavid Howells enum rxrpc_congest_mode mode:8; 70257494343SDavid Howells u8 cwnd; 70357494343SDavid Howells u8 ssthresh; 70457494343SDavid Howells u8 dup_acks; 70557494343SDavid Howells u8 cumulative_acks; 70617926a79SDavid Howells }; 70717926a79SDavid Howells 70848124178SDavid Howells /* 70948124178SDavid Howells * sendmsg() cmsg-specified parameters. 71048124178SDavid Howells */ 71148124178SDavid Howells enum rxrpc_command { 71248124178SDavid Howells RXRPC_CMD_SEND_DATA, /* send data message */ 71348124178SDavid Howells RXRPC_CMD_SEND_ABORT, /* request abort generation */ 71448124178SDavid Howells RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ 71548124178SDavid Howells RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ 71648124178SDavid Howells }; 71748124178SDavid Howells 71848124178SDavid Howells struct rxrpc_call_params { 71948124178SDavid Howells s64 tx_total_len; /* Total Tx data length (if send data) */ 72048124178SDavid Howells unsigned long user_call_ID; /* User's call ID */ 72148124178SDavid Howells struct { 72248124178SDavid Howells u32 hard; /* Maximum lifetime (sec) */ 72348124178SDavid Howells u32 idle; /* Max time since last data packet (msec) */ 72448124178SDavid Howells u32 normal; /* Max time since last call packet (msec) */ 72548124178SDavid Howells } timeouts; 72648124178SDavid Howells u8 nr_timeouts; /* Number of timeouts specified */ 727e138aa7dSDavid Howells enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */ 72848124178SDavid Howells }; 72948124178SDavid Howells 73048124178SDavid Howells struct rxrpc_send_params { 73148124178SDavid Howells struct rxrpc_call_params call; 73248124178SDavid Howells u32 abort_code; /* Abort code to Tx (if abort) */ 73348124178SDavid Howells enum rxrpc_command command : 8; /* The command to implement */ 73448124178SDavid Howells bool exclusive; /* Shared or exclusive call */ 73548124178SDavid Howells bool upgrade; /* If the connection is upgradeable */ 73648124178SDavid Howells }; 73748124178SDavid Howells 738df844fd4SDavid Howells #include <trace/events/rxrpc.h> 739df844fd4SDavid Howells 74017926a79SDavid Howells /* 741651350d1SDavid Howells * af_rxrpc.c 74217926a79SDavid Howells */ 74371f3ca40SDavid Howells extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; 744651350d1SDavid Howells extern struct workqueue_struct *rxrpc_workqueue; 74517926a79SDavid Howells 74617926a79SDavid Howells /* 7470d81a51aSDavid Howells * call_accept.c 74817926a79SDavid Howells */ 74900e90712SDavid Howells int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); 75000e90712SDavid Howells void rxrpc_discard_prealloc(struct rxrpc_sock *); 751248f219cSDavid Howells struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, 7520099dc58SDavid Howells struct rxrpc_sock *, 753248f219cSDavid Howells struct sk_buff *); 7544f95dd78SDavid Howells void rxrpc_accept_incoming_calls(struct rxrpc_local *); 755d001648eSDavid Howells struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, 756d001648eSDavid Howells rxrpc_notify_rx_t); 757c1b1203dSJoe Perches int rxrpc_reject_call(struct rxrpc_sock *); 75817926a79SDavid Howells 75917926a79SDavid Howells /* 7600d81a51aSDavid Howells * call_event.c 76117926a79SDavid Howells */ 762e8c3af6bSDavid Howells void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool, 7639c7ad434SDavid Howells enum rxrpc_propose_ack_trace); 764c1b1203dSJoe Perches void rxrpc_process_call(struct work_struct *); 76517926a79SDavid Howells 766a158bdd3SDavid Howells static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, 767a158bdd3SDavid Howells unsigned long expire_at, 768a158bdd3SDavid Howells unsigned long now, 769a158bdd3SDavid Howells enum rxrpc_timer_trace why) 770a158bdd3SDavid Howells { 771a158bdd3SDavid Howells trace_rxrpc_timer(call, why, now); 772a158bdd3SDavid Howells timer_reduce(&call->timer, expire_at); 773a158bdd3SDavid Howells } 774a158bdd3SDavid Howells 77517926a79SDavid Howells /* 7760d81a51aSDavid Howells * call_object.c 77717926a79SDavid Howells */ 778f5c17aaeSDavid Howells extern const char *const rxrpc_call_states[]; 779f5c17aaeSDavid Howells extern const char *const rxrpc_call_completions[]; 780dad8aff7SDavid Howells extern unsigned int rxrpc_max_call_lifetime; 78117926a79SDavid Howells extern struct kmem_cache *rxrpc_call_jar; 78217926a79SDavid Howells 7832341e077SDavid Howells struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); 784a25e21f0SDavid Howells struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); 7852341e077SDavid Howells struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, 78619ffa01cSDavid Howells struct rxrpc_conn_parameters *, 787999b69f8SDavid Howells struct sockaddr_rxrpc *, 788a25e21f0SDavid Howells struct rxrpc_call_params *, gfp_t, 789a25e21f0SDavid Howells unsigned int); 790248f219cSDavid Howells void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, 79142886ffeSDavid Howells struct sk_buff *); 7928d94aa38SDavid Howells void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); 793c1b1203dSJoe Perches void rxrpc_release_calls_on_socket(struct rxrpc_sock *); 7948d94aa38SDavid Howells bool __rxrpc_queue_call(struct rxrpc_call *); 7958d94aa38SDavid Howells bool rxrpc_queue_call(struct rxrpc_call *); 796e34d4234SDavid Howells void rxrpc_see_call(struct rxrpc_call *); 797fff72429SDavid Howells void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); 798fff72429SDavid Howells void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); 79900e90712SDavid Howells void rxrpc_cleanup_call(struct rxrpc_call *); 8002baec2c3SDavid Howells void rxrpc_destroy_all_calls(struct rxrpc_net *); 80117926a79SDavid Howells 802dabe5a79SDavid Howells static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) 803dabe5a79SDavid Howells { 804dabe5a79SDavid Howells return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); 805dabe5a79SDavid Howells } 806dabe5a79SDavid Howells 807dabe5a79SDavid Howells static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) 808dabe5a79SDavid Howells { 809dabe5a79SDavid Howells return !rxrpc_is_service_call(call); 810dabe5a79SDavid Howells } 811dabe5a79SDavid Howells 81217926a79SDavid Howells /* 813f5c17aaeSDavid Howells * Transition a call to the complete state. 814f5c17aaeSDavid Howells */ 815f5c17aaeSDavid Howells static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, 816f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 817f5c17aaeSDavid Howells u32 abort_code, 818f5c17aaeSDavid Howells int error) 819f5c17aaeSDavid Howells { 820f5c17aaeSDavid Howells if (call->state < RXRPC_CALL_COMPLETE) { 821f5c17aaeSDavid Howells call->abort_code = abort_code; 822f5c17aaeSDavid Howells call->error = error; 823f5c17aaeSDavid Howells call->completion = compl, 824f5c17aaeSDavid Howells call->state = RXRPC_CALL_COMPLETE; 8251bae5d22SDavid Howells trace_rxrpc_call_complete(call); 826c0d058c2SDavid Howells wake_up(&call->waitq); 827f5c17aaeSDavid Howells return true; 828f5c17aaeSDavid Howells } 829f5c17aaeSDavid Howells return false; 830f5c17aaeSDavid Howells } 831f5c17aaeSDavid Howells 832f5c17aaeSDavid Howells static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, 833f5c17aaeSDavid Howells enum rxrpc_call_completion compl, 834f5c17aaeSDavid Howells u32 abort_code, 835f5c17aaeSDavid Howells int error) 836f5c17aaeSDavid Howells { 837e8d6bbb0SDavid Howells bool ret; 838f5c17aaeSDavid Howells 839f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 840f5c17aaeSDavid Howells ret = __rxrpc_set_call_completion(call, compl, abort_code, error); 841f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 842f5c17aaeSDavid Howells return ret; 843f5c17aaeSDavid Howells } 844f5c17aaeSDavid Howells 845f5c17aaeSDavid Howells /* 846f5c17aaeSDavid Howells * Record that a call successfully completed. 847f5c17aaeSDavid Howells */ 848e8d6bbb0SDavid Howells static inline bool __rxrpc_call_completed(struct rxrpc_call *call) 849f5c17aaeSDavid Howells { 850e8d6bbb0SDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); 851f5c17aaeSDavid Howells } 852f5c17aaeSDavid Howells 853e8d6bbb0SDavid Howells static inline bool rxrpc_call_completed(struct rxrpc_call *call) 854f5c17aaeSDavid Howells { 855e8d6bbb0SDavid Howells bool ret; 856e8d6bbb0SDavid Howells 857f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 858e8d6bbb0SDavid Howells ret = __rxrpc_call_completed(call); 859f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 860e8d6bbb0SDavid Howells return ret; 861f5c17aaeSDavid Howells } 862f5c17aaeSDavid Howells 863f5c17aaeSDavid Howells /* 864f5c17aaeSDavid Howells * Record that a call is locally aborted. 865f5c17aaeSDavid Howells */ 8665a42976dSDavid Howells static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8675a42976dSDavid Howells rxrpc_seq_t seq, 868f5c17aaeSDavid Howells u32 abort_code, int error) 869f5c17aaeSDavid Howells { 870a25e21f0SDavid Howells trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, 8715a42976dSDavid Howells abort_code, error); 872248f219cSDavid Howells return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, 873248f219cSDavid Howells abort_code, error); 874f5c17aaeSDavid Howells } 875f5c17aaeSDavid Howells 8765a42976dSDavid Howells static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, 8775a42976dSDavid Howells rxrpc_seq_t seq, u32 abort_code, int error) 878f5c17aaeSDavid Howells { 879f5c17aaeSDavid Howells bool ret; 880f5c17aaeSDavid Howells 881f5c17aaeSDavid Howells write_lock_bh(&call->state_lock); 8825a42976dSDavid Howells ret = __rxrpc_abort_call(why, call, seq, abort_code, error); 883f5c17aaeSDavid Howells write_unlock_bh(&call->state_lock); 884f5c17aaeSDavid Howells return ret; 885f5c17aaeSDavid Howells } 886f5c17aaeSDavid Howells 887f5c17aaeSDavid Howells /* 888fb46f6eeSDavid Howells * Abort a call due to a protocol error. 889fb46f6eeSDavid Howells */ 890fb46f6eeSDavid Howells static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, 891fb46f6eeSDavid Howells struct sk_buff *skb, 892fb46f6eeSDavid Howells const char *eproto_why, 893fb46f6eeSDavid Howells const char *why, 894fb46f6eeSDavid Howells u32 abort_code) 895fb46f6eeSDavid Howells { 896fb46f6eeSDavid Howells struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 897fb46f6eeSDavid Howells 898fb46f6eeSDavid Howells trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); 899fb46f6eeSDavid Howells return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); 900fb46f6eeSDavid Howells } 901fb46f6eeSDavid Howells 902fb46f6eeSDavid Howells #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ 903fb46f6eeSDavid Howells __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ 904fb46f6eeSDavid Howells (abort_why), (abort_code)) 905fb46f6eeSDavid Howells 906fb46f6eeSDavid Howells /* 9074a3388c8SDavid Howells * conn_client.c 9084a3388c8SDavid Howells */ 90945025bceSDavid Howells extern unsigned int rxrpc_max_client_connections; 91045025bceSDavid Howells extern unsigned int rxrpc_reap_client_connections; 911a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_expiry; 912a158bdd3SDavid Howells extern unsigned long rxrpc_conn_idle_client_fast_expiry; 9134a3388c8SDavid Howells extern struct idr rxrpc_client_conn_ids; 9144a3388c8SDavid Howells 915eb9b9d22SDavid Howells void rxrpc_destroy_client_conn_ids(void); 9165e33a23bSDavid Howells int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *, 9175e33a23bSDavid Howells struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, 9185e33a23bSDavid Howells gfp_t); 91945025bceSDavid Howells void rxrpc_expose_client_call(struct rxrpc_call *); 92045025bceSDavid Howells void rxrpc_disconnect_client_call(struct rxrpc_call *); 92145025bceSDavid Howells void rxrpc_put_client_conn(struct rxrpc_connection *); 9222baec2c3SDavid Howells void rxrpc_discard_expired_client_conns(struct work_struct *); 9232baec2c3SDavid Howells void rxrpc_destroy_all_client_connections(struct rxrpc_net *); 924d12040b6SDavid Howells void rxrpc_clean_up_local_conns(struct rxrpc_local *); 9254a3388c8SDavid Howells 9264a3388c8SDavid Howells /* 9270d81a51aSDavid Howells * conn_event.c 9280d81a51aSDavid Howells */ 9290d81a51aSDavid Howells void rxrpc_process_connection(struct work_struct *); 9300d81a51aSDavid Howells 9310d81a51aSDavid Howells /* 9320d81a51aSDavid Howells * conn_object.c 93317926a79SDavid Howells */ 934dad8aff7SDavid Howells extern unsigned int rxrpc_connection_expiry; 935f859ab61SDavid Howells extern unsigned int rxrpc_closed_conn_expiry; 93617926a79SDavid Howells 937c6d2b8d7SDavid Howells struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); 9388496af50SDavid Howells struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, 9390099dc58SDavid Howells struct sk_buff *, 9400099dc58SDavid Howells struct rxrpc_peer **); 94145025bceSDavid Howells void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); 942999b69f8SDavid Howells void rxrpc_disconnect_call(struct rxrpc_call *); 94345025bceSDavid Howells void rxrpc_kill_connection(struct rxrpc_connection *); 944363deeabSDavid Howells bool rxrpc_queue_conn(struct rxrpc_connection *); 945363deeabSDavid Howells void rxrpc_see_connection(struct rxrpc_connection *); 946363deeabSDavid Howells void rxrpc_get_connection(struct rxrpc_connection *); 947363deeabSDavid Howells struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); 948363deeabSDavid Howells void rxrpc_put_service_conn(struct rxrpc_connection *); 9492baec2c3SDavid Howells void rxrpc_service_connection_reaper(struct work_struct *); 9502baec2c3SDavid Howells void rxrpc_destroy_all_connections(struct rxrpc_net *); 95117926a79SDavid Howells 95219ffa01cSDavid Howells static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) 95319ffa01cSDavid Howells { 95419ffa01cSDavid Howells return conn->out_clientflag; 95519ffa01cSDavid Howells } 95619ffa01cSDavid Howells 95719ffa01cSDavid Howells static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) 95819ffa01cSDavid Howells { 959e8d70ce1SDavid Howells return !rxrpc_conn_is_client(conn); 96019ffa01cSDavid Howells } 96119ffa01cSDavid Howells 962f51b4480SDavid Howells static inline void rxrpc_put_connection(struct rxrpc_connection *conn) 963f51b4480SDavid Howells { 96445025bceSDavid Howells if (!conn) 96545025bceSDavid Howells return; 96645025bceSDavid Howells 967363deeabSDavid Howells if (rxrpc_conn_is_client(conn)) 96845025bceSDavid Howells rxrpc_put_client_conn(conn); 969363deeabSDavid Howells else 970363deeabSDavid Howells rxrpc_put_service_conn(conn); 9715acbee46SDavid Howells } 9725acbee46SDavid Howells 9733136ef49SDavid Howells static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, 9743136ef49SDavid Howells unsigned long expire_at) 9753136ef49SDavid Howells { 9763136ef49SDavid Howells timer_reduce(&conn->timer, expire_at); 9773136ef49SDavid Howells } 9783136ef49SDavid Howells 97917926a79SDavid Howells /* 9807877a4a4SDavid Howells * conn_service.c 9817877a4a4SDavid Howells */ 9828496af50SDavid Howells struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, 9838496af50SDavid Howells struct sk_buff *); 9842baec2c3SDavid Howells struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); 985063c60d3SDavid Howells void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *, 986063c60d3SDavid Howells const struct rxrpc_security *, struct key *, 987063c60d3SDavid Howells struct sk_buff *); 988001c1122SDavid Howells void rxrpc_unpublish_service_conn(struct rxrpc_connection *); 9897877a4a4SDavid Howells 9907877a4a4SDavid Howells /* 9910d81a51aSDavid Howells * input.c 99217926a79SDavid Howells */ 9935271953cSDavid Howells int rxrpc_input_packet(struct sock *, struct sk_buff *); 99417926a79SDavid Howells 99517926a79SDavid Howells /* 9960d81a51aSDavid Howells * insecure.c 99717926a79SDavid Howells */ 9980d81a51aSDavid Howells extern const struct rxrpc_security rxrpc_no_security; 99917926a79SDavid Howells 100017926a79SDavid Howells /* 10010d81a51aSDavid Howells * key.c 100217926a79SDavid Howells */ 100317926a79SDavid Howells extern struct key_type key_type_rxrpc; 100417926a79SDavid Howells extern struct key_type key_type_rxrpc_s; 100517926a79SDavid Howells 1006c1b1203dSJoe Perches int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); 1007c1b1203dSJoe Perches int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); 100810674a03SBaolin Wang int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, 1009c1b1203dSJoe Perches u32); 101017926a79SDavid Howells 101117926a79SDavid Howells /* 101287563616SDavid Howells * local_event.c 101387563616SDavid Howells */ 10144f95dd78SDavid Howells extern void rxrpc_process_local_events(struct rxrpc_local *); 101587563616SDavid Howells 101687563616SDavid Howells /* 10170d81a51aSDavid Howells * local_object.c 101817926a79SDavid Howells */ 10192baec2c3SDavid Howells struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); 102009d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); 102109d2bf59SDavid Howells struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); 102209d2bf59SDavid Howells void rxrpc_put_local(struct rxrpc_local *); 1023730c5fd4SDavid Howells struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *); 1024730c5fd4SDavid Howells void rxrpc_unuse_local(struct rxrpc_local *); 102509d2bf59SDavid Howells void rxrpc_queue_local(struct rxrpc_local *); 10262baec2c3SDavid Howells void rxrpc_destroy_all_locals(struct rxrpc_net *); 1027e0e4d82fSDavid Howells 102804d36d74SDavid Howells static inline bool __rxrpc_unuse_local(struct rxrpc_local *local) 102904d36d74SDavid Howells { 103004d36d74SDavid Howells return atomic_dec_return(&local->active_users) == 0; 103104d36d74SDavid Howells } 103204d36d74SDavid Howells 103304d36d74SDavid Howells static inline bool __rxrpc_use_local(struct rxrpc_local *local) 103404d36d74SDavid Howells { 103504d36d74SDavid Howells return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0; 103604d36d74SDavid Howells } 103704d36d74SDavid Howells 1038e0e4d82fSDavid Howells /* 10398e688d9cSDavid Howells * misc.c 10408e688d9cSDavid Howells */ 10410e119b41SDavid Howells extern unsigned int rxrpc_max_backlog __read_mostly; 1042a158bdd3SDavid Howells extern unsigned long rxrpc_requested_ack_delay; 1043a158bdd3SDavid Howells extern unsigned long rxrpc_soft_ack_delay; 1044a158bdd3SDavid Howells extern unsigned long rxrpc_idle_ack_delay; 10458e688d9cSDavid Howells extern unsigned int rxrpc_rx_window_size; 10468e688d9cSDavid Howells extern unsigned int rxrpc_rx_mtu; 10478e688d9cSDavid Howells extern unsigned int rxrpc_rx_jumbo_max; 10488e688d9cSDavid Howells 10498e688d9cSDavid Howells extern const s8 rxrpc_ack_priority[]; 10508e688d9cSDavid Howells 10518e688d9cSDavid Howells /* 10522baec2c3SDavid Howells * net_ns.c 10532baec2c3SDavid Howells */ 10542baec2c3SDavid Howells extern unsigned int rxrpc_net_id; 10552baec2c3SDavid Howells extern struct pernet_operations rxrpc_net_ops; 10562baec2c3SDavid Howells 10572baec2c3SDavid Howells static inline struct rxrpc_net *rxrpc_net(struct net *net) 10582baec2c3SDavid Howells { 10592baec2c3SDavid Howells return net_generic(net, rxrpc_net_id); 10602baec2c3SDavid Howells } 10612baec2c3SDavid Howells 10622baec2c3SDavid Howells /* 10630d81a51aSDavid Howells * output.c 10640d81a51aSDavid Howells */ 1065bd1fdf8cSDavid Howells int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); 106626cb02aaSDavid Howells int rxrpc_send_abort_packet(struct rxrpc_call *); 1067a1767077SDavid Howells int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); 1068248f219cSDavid Howells void rxrpc_reject_packets(struct rxrpc_local *); 1069ace45becSDavid Howells void rxrpc_send_keepalive(struct rxrpc_peer *); 10700d81a51aSDavid Howells 10710d81a51aSDavid Howells /* 1072abe89ef0SDavid Howells * peer_event.c 10730d81a51aSDavid Howells */ 1074abe89ef0SDavid Howells void rxrpc_error_report(struct sock *); 1075ace45becSDavid Howells void rxrpc_peer_keepalive_worker(struct work_struct *); 10760d81a51aSDavid Howells 10770d81a51aSDavid Howells /* 10780d81a51aSDavid Howells * peer_object.c 10790d81a51aSDavid Howells */ 1080be6e6707SDavid Howells struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, 1081be6e6707SDavid Howells const struct sockaddr_rxrpc *); 10825e33a23bSDavid Howells struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *, 1083be6e6707SDavid Howells struct sockaddr_rxrpc *, gfp_t); 1084be6e6707SDavid Howells struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); 10855e33a23bSDavid Howells void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *, 10865e33a23bSDavid Howells struct rxrpc_peer *); 108717226f12SDavid Howells void rxrpc_destroy_all_peers(struct rxrpc_net *); 10881159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); 10891159d4b4SDavid Howells struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); 10901159d4b4SDavid Howells void rxrpc_put_peer(struct rxrpc_peer *); 109160034d3dSDavid Howells void rxrpc_put_peer_locked(struct rxrpc_peer *); 10920d81a51aSDavid Howells 10930d81a51aSDavid Howells /* 10940d81a51aSDavid Howells * proc.c 10950d81a51aSDavid Howells */ 1096c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_call_seq_ops; 1097c3506372SChristoph Hellwig extern const struct seq_operations rxrpc_connection_seq_ops; 1098bc0e7cf4SDavid Howells extern const struct seq_operations rxrpc_peer_seq_ops; 10990d81a51aSDavid Howells 11000d81a51aSDavid Howells /* 11010d81a51aSDavid Howells * recvmsg.c 11020d81a51aSDavid Howells */ 1103248f219cSDavid Howells void rxrpc_notify_socket(struct rxrpc_call *); 11040d81a51aSDavid Howells int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); 11050d81a51aSDavid Howells 11060d81a51aSDavid Howells /* 1107c410bf01SDavid Howells * rtt.c 1108c410bf01SDavid Howells */ 1109c410bf01SDavid Howells void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, 1110c410bf01SDavid Howells rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); 1111c410bf01SDavid Howells unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool); 1112c410bf01SDavid Howells void rxrpc_peer_init_rtt(struct rxrpc_peer *); 1113c410bf01SDavid Howells 1114c410bf01SDavid Howells /* 1115648af7fcSDavid Howells * rxkad.c 1116648af7fcSDavid Howells */ 1117648af7fcSDavid Howells #ifdef CONFIG_RXKAD 1118648af7fcSDavid Howells extern const struct rxrpc_security rxkad; 1119648af7fcSDavid Howells #endif 1120648af7fcSDavid Howells 1121648af7fcSDavid Howells /* 11220d81a51aSDavid Howells * security.c 11230d81a51aSDavid Howells */ 11240d81a51aSDavid Howells int __init rxrpc_init_security(void); 11250d81a51aSDavid Howells void rxrpc_exit_security(void); 11260d81a51aSDavid Howells int rxrpc_init_client_conn_security(struct rxrpc_connection *); 1127063c60d3SDavid Howells bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *, 1128063c60d3SDavid Howells const struct rxrpc_security **, struct key **, 1129063c60d3SDavid Howells struct sk_buff *); 11300d81a51aSDavid Howells 11310d81a51aSDavid Howells /* 11320b58b8a1SDavid Howells * sendmsg.c 11330b58b8a1SDavid Howells */ 11340b58b8a1SDavid Howells int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); 11350b58b8a1SDavid Howells 11360b58b8a1SDavid Howells /* 11370d81a51aSDavid Howells * skbuff.c 11380d81a51aSDavid Howells */ 1139d001648eSDavid Howells void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); 11400d81a51aSDavid Howells void rxrpc_packet_destructor(struct sk_buff *); 114171f3ca40SDavid Howells void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); 114271f3ca40SDavid Howells void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); 1143d0d5c0cdSDavid Howells void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace); 114471f3ca40SDavid Howells void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); 114571f3ca40SDavid Howells void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); 1146df844fd4SDavid Howells void rxrpc_purge_queue(struct sk_buff_head *); 11470d81a51aSDavid Howells 11480d81a51aSDavid Howells /* 11495873c083SDavid Howells * sysctl.c 11505873c083SDavid Howells */ 11515873c083SDavid Howells #ifdef CONFIG_SYSCTL 11525873c083SDavid Howells extern int __init rxrpc_sysctl_init(void); 11535873c083SDavid Howells extern void rxrpc_sysctl_exit(void); 11545873c083SDavid Howells #else 11555873c083SDavid Howells static inline int __init rxrpc_sysctl_init(void) { return 0; } 11565873c083SDavid Howells static inline void rxrpc_sysctl_exit(void) {} 11575873c083SDavid Howells #endif 11585873c083SDavid Howells 11595873c083SDavid Howells /* 1160be6e6707SDavid Howells * utils.c 1161be6e6707SDavid Howells */ 11625a790b73SDavid Howells int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); 1163be6e6707SDavid Howells 1164248f219cSDavid Howells static inline bool before(u32 seq1, u32 seq2) 1165248f219cSDavid Howells { 1166248f219cSDavid Howells return (s32)(seq1 - seq2) < 0; 1167248f219cSDavid Howells } 1168248f219cSDavid Howells static inline bool before_eq(u32 seq1, u32 seq2) 1169248f219cSDavid Howells { 1170248f219cSDavid Howells return (s32)(seq1 - seq2) <= 0; 1171248f219cSDavid Howells } 1172248f219cSDavid Howells static inline bool after(u32 seq1, u32 seq2) 1173248f219cSDavid Howells { 1174248f219cSDavid Howells return (s32)(seq1 - seq2) > 0; 1175248f219cSDavid Howells } 1176248f219cSDavid Howells static inline bool after_eq(u32 seq1, u32 seq2) 1177248f219cSDavid Howells { 1178248f219cSDavid Howells return (s32)(seq1 - seq2) >= 0; 1179248f219cSDavid Howells } 1180248f219cSDavid Howells 1181be6e6707SDavid Howells /* 118217926a79SDavid Howells * debug tracing 118317926a79SDavid Howells */ 118495c96174SEric Dumazet extern unsigned int rxrpc_debug; 118517926a79SDavid Howells 118617926a79SDavid Howells #define dbgprintk(FMT,...) \ 11879f389f4bSSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 118817926a79SDavid Howells 11890dc47877SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 11900dc47877SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 119117926a79SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 119217926a79SDavid Howells #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) 119317926a79SDavid Howells #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) 119417926a79SDavid Howells 119517926a79SDavid Howells 119617926a79SDavid Howells #if defined(__KDEBUG) 119717926a79SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 119817926a79SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 119917926a79SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 120017926a79SDavid Howells #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) 120117926a79SDavid Howells #define _net(FMT,...) knet(FMT,##__VA_ARGS__) 120217926a79SDavid Howells 120317926a79SDavid Howells #elif defined(CONFIG_AF_RXRPC_DEBUG) 120417926a79SDavid Howells #define RXRPC_DEBUG_KENTER 0x01 120517926a79SDavid Howells #define RXRPC_DEBUG_KLEAVE 0x02 120617926a79SDavid Howells #define RXRPC_DEBUG_KDEBUG 0x04 120717926a79SDavid Howells #define RXRPC_DEBUG_KPROTO 0x08 120817926a79SDavid Howells #define RXRPC_DEBUG_KNET 0x10 120917926a79SDavid Howells 121017926a79SDavid Howells #define _enter(FMT,...) \ 121117926a79SDavid Howells do { \ 121217926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ 121317926a79SDavid Howells kenter(FMT,##__VA_ARGS__); \ 121417926a79SDavid Howells } while (0) 121517926a79SDavid Howells 121617926a79SDavid Howells #define _leave(FMT,...) \ 121717926a79SDavid Howells do { \ 121817926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ 121917926a79SDavid Howells kleave(FMT,##__VA_ARGS__); \ 122017926a79SDavid Howells } while (0) 122117926a79SDavid Howells 122217926a79SDavid Howells #define _debug(FMT,...) \ 122317926a79SDavid Howells do { \ 122417926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ 122517926a79SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 122617926a79SDavid Howells } while (0) 122717926a79SDavid Howells 122817926a79SDavid Howells #define _proto(FMT,...) \ 122917926a79SDavid Howells do { \ 123017926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ 123117926a79SDavid Howells kproto(FMT,##__VA_ARGS__); \ 123217926a79SDavid Howells } while (0) 123317926a79SDavid Howells 123417926a79SDavid Howells #define _net(FMT,...) \ 123517926a79SDavid Howells do { \ 123617926a79SDavid Howells if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ 123717926a79SDavid Howells knet(FMT,##__VA_ARGS__); \ 123817926a79SDavid Howells } while (0) 123917926a79SDavid Howells 124017926a79SDavid Howells #else 124112fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 124212fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 124312fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 124412fdff3fSDavid Howells #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) 124512fdff3fSDavid Howells #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) 124617926a79SDavid Howells #endif 124717926a79SDavid Howells 124817926a79SDavid Howells /* 124917926a79SDavid Howells * debug assertion checking 125017926a79SDavid Howells */ 125117926a79SDavid Howells #if 1 // defined(__KDEBUGALL) 125217926a79SDavid Howells 125317926a79SDavid Howells #define ASSERT(X) \ 125417926a79SDavid Howells do { \ 125517926a79SDavid Howells if (unlikely(!(X))) { \ 12569b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 125717926a79SDavid Howells BUG(); \ 125817926a79SDavid Howells } \ 125917926a79SDavid Howells } while (0) 126017926a79SDavid Howells 126117926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 126217926a79SDavid Howells do { \ 1263cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1264cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12659b6d5398SJoe Perches if (unlikely(!(_x OP _y))) { \ 12669b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1267cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1268cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 126917926a79SDavid Howells BUG(); \ 127017926a79SDavid Howells } \ 127117926a79SDavid Howells } while (0) 127217926a79SDavid Howells 127317926a79SDavid Howells #define ASSERTIF(C, X) \ 127417926a79SDavid Howells do { \ 127517926a79SDavid Howells if (unlikely((C) && !(X))) { \ 12769b6d5398SJoe Perches pr_err("Assertion failed\n"); \ 127717926a79SDavid Howells BUG(); \ 127817926a79SDavid Howells } \ 127917926a79SDavid Howells } while (0) 128017926a79SDavid Howells 128117926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 128217926a79SDavid Howells do { \ 1283cf13258fSDavid Howells __typeof__(X) _x = (X); \ 1284cf13258fSDavid Howells __typeof__(Y) _y = (__typeof__(X))(Y); \ 12859b6d5398SJoe Perches if (unlikely((C) && !(_x OP _y))) { \ 12869b6d5398SJoe Perches pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ 1287cf13258fSDavid Howells (unsigned long)_x, (unsigned long)_x, #OP, \ 1288cf13258fSDavid Howells (unsigned long)_y, (unsigned long)_y); \ 128917926a79SDavid Howells BUG(); \ 129017926a79SDavid Howells } \ 129117926a79SDavid Howells } while (0) 129217926a79SDavid Howells 129317926a79SDavid Howells #else 129417926a79SDavid Howells 129517926a79SDavid Howells #define ASSERT(X) \ 129617926a79SDavid Howells do { \ 129717926a79SDavid Howells } while (0) 129817926a79SDavid Howells 129917926a79SDavid Howells #define ASSERTCMP(X, OP, Y) \ 130017926a79SDavid Howells do { \ 130117926a79SDavid Howells } while (0) 130217926a79SDavid Howells 130317926a79SDavid Howells #define ASSERTIF(C, X) \ 130417926a79SDavid Howells do { \ 130517926a79SDavid Howells } while (0) 130617926a79SDavid Howells 130717926a79SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 130817926a79SDavid Howells do { \ 130917926a79SDavid Howells } while (0) 131017926a79SDavid Howells 131117926a79SDavid Howells #endif /* __KDEBUGALL */ 1312