David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1 | /* AF_RXRPC internal definitions |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 12 | #include <linux/atomic.h> |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 13 | #include <linux/seqlock.h> |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 14 | #include <net/net_namespace.h> |
| 15 | #include <net/netns/generic.h> |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 16 | #include <net/sock.h> |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 17 | #include <net/af_rxrpc.h> |
David Howells | ddc6c70 | 2017-07-21 10:07:10 +0100 | [diff] [blame] | 18 | #include "protocol.h" |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 19 | |
| 20 | #if 0 |
| 21 | #define CHECK_SLAB_OKAY(X) \ |
| 22 | BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ |
| 23 | (POISON_FREE << 8 | POISON_FREE)) |
| 24 | #else |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 25 | #define CHECK_SLAB_OKAY(X) do {} while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 26 | #endif |
| 27 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 28 | #define FCRYPT_BSIZE 8 |
| 29 | struct rxrpc_crypt { |
| 30 | union { |
| 31 | u8 x[FCRYPT_BSIZE]; |
Al Viro | 91e916c | 2008-03-29 03:08:38 +0000 | [diff] [blame] | 32 | __be32 n[2]; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 33 | }; |
| 34 | } __attribute__((aligned(8))); |
| 35 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 36 | #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
| 37 | #define rxrpc_queue_delayed_work(WS,D) \ |
| 38 | queue_delayed_work(rxrpc_workqueue, (WS), (D)) |
| 39 | |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 40 | struct rxrpc_connection; |
| 41 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 42 | /* |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 43 | * Mark applied to socket buffers. |
| 44 | */ |
| 45 | enum rxrpc_skb_mark { |
| 46 | RXRPC_SKB_MARK_DATA, /* data message */ |
| 47 | RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ |
| 48 | RXRPC_SKB_MARK_BUSY, /* server busy message */ |
| 49 | RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ |
| 50 | RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ |
| 51 | RXRPC_SKB_MARK_NET_ERROR, /* network error message */ |
| 52 | RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ |
| 53 | RXRPC_SKB_MARK_NEW_CALL, /* local error message */ |
| 54 | }; |
| 55 | |
| 56 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 57 | * sk_state for RxRPC sockets |
| 58 | */ |
| 59 | enum { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 60 | RXRPC_UNBOUND = 0, |
| 61 | RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 62 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 63 | RXRPC_SERVER_BOUND, /* server local address bound */ |
David Howells | 28036f4 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 64 | RXRPC_SERVER_BOUND2, /* second server local address bound */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 65 | RXRPC_SERVER_LISTENING, /* server listening for connections */ |
David Howells | 210f035 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 66 | RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 67 | RXRPC_CLOSE, /* socket is being closed */ |
| 68 | }; |
| 69 | |
| 70 | /* |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 71 | * Per-network namespace data. |
| 72 | */ |
| 73 | struct rxrpc_net { |
| 74 | struct proc_dir_entry *proc_net; /* Subdir in /proc/net */ |
| 75 | u32 epoch; /* Local epoch for detecting local-end reset */ |
| 76 | struct list_head calls; /* List of calls active in this namespace */ |
| 77 | rwlock_t call_lock; /* Lock for ->calls */ |
David Howells | d3be4d2 | 2018-03-30 21:05:23 +0100 | [diff] [blame] | 78 | atomic_t nr_calls; /* Count of allocated calls */ |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 79 | |
David Howells | 31f5f9a16 | 2018-03-30 21:05:33 +0100 | [diff] [blame] | 80 | atomic_t nr_conns; |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 81 | struct list_head conn_proc_list; /* List of conns in this namespace for proc */ |
| 82 | struct list_head service_conns; /* Service conns in this namespace */ |
| 83 | rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */ |
David Howells | 3d18cbb | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 84 | struct work_struct service_conn_reaper; |
| 85 | struct timer_list service_conn_reap_timer; |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 86 | |
| 87 | unsigned int nr_client_conns; |
| 88 | unsigned int nr_active_client_conns; |
| 89 | bool kill_all_client_conns; |
David Howells | f859ab6 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 90 | bool live; |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 91 | spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */ |
| 92 | spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */ |
| 93 | struct list_head waiting_client_conns; |
| 94 | struct list_head active_client_conns; |
| 95 | struct list_head idle_client_conns; |
David Howells | 3d18cbb | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 96 | struct work_struct client_conn_reaper; |
| 97 | struct timer_list client_conn_reap_timer; |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 98 | |
| 99 | struct list_head local_endpoints; |
| 100 | struct mutex local_mutex; /* Lock for ->local_endpoints */ |
| 101 | |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 102 | DECLARE_HASHTABLE (peer_hash, 10); |
David Howells | ace45be | 2018-03-30 21:04:43 +0100 | [diff] [blame] | 103 | spinlock_t peer_hash_lock; /* Lock for ->peer_hash */ |
| 104 | |
| 105 | #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */ |
| 106 | u8 peer_keepalive_cursor; |
David Howells | 330bdcf | 2018-08-08 11:30:02 +0100 | [diff] [blame^] | 107 | time64_t peer_keepalive_base; |
| 108 | struct list_head peer_keepalive[32]; |
| 109 | struct list_head peer_keepalive_new; |
David Howells | ace45be | 2018-03-30 21:04:43 +0100 | [diff] [blame] | 110 | struct timer_list peer_keepalive_timer; |
| 111 | struct work_struct peer_keepalive_work; |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | /* |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 115 | * Service backlog preallocation. |
| 116 | * |
| 117 | * This contains circular buffers of preallocated peers, connections and calls |
| 118 | * for incoming service calls and their head and tail pointers. This allows |
| 119 | * calls to be set up in the data_ready handler, thereby avoiding the need to |
| 120 | * shuffle packets around so much. |
| 121 | */ |
| 122 | struct rxrpc_backlog { |
| 123 | unsigned short peer_backlog_head; |
| 124 | unsigned short peer_backlog_tail; |
| 125 | unsigned short conn_backlog_head; |
| 126 | unsigned short conn_backlog_tail; |
| 127 | unsigned short call_backlog_head; |
| 128 | unsigned short call_backlog_tail; |
| 129 | #define RXRPC_BACKLOG_MAX 32 |
| 130 | struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX]; |
| 131 | struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX]; |
| 132 | struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX]; |
| 133 | }; |
| 134 | |
| 135 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 136 | * RxRPC socket definition |
| 137 | */ |
| 138 | struct rxrpc_sock { |
| 139 | /* WARNING: sk has to be the first member */ |
| 140 | struct sock sk; |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 141 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 142 | rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 143 | struct rxrpc_local *local; /* local endpoint */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 144 | struct rxrpc_backlog *backlog; /* Preallocation for services */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 145 | spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ |
| 146 | struct list_head sock_calls; /* List of calls owned by this socket */ |
| 147 | struct list_head to_be_accepted; /* calls awaiting acceptance */ |
| 148 | struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ |
| 149 | rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 150 | struct key *key; /* security for this socket */ |
| 151 | struct key *securities; /* list of server security descriptors */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 152 | struct rb_root calls; /* User ID -> call mapping */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 153 | unsigned long flags; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 154 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 155 | rwlock_t call_lock; /* lock for calls */ |
| 156 | u32 min_sec_level; /* minimum security level */ |
| 157 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 158 | bool exclusive; /* Exclusive connection for a client socket */ |
David Howells | 28036f4 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 159 | u16 second_service; /* Additional service bound to the endpoint */ |
David Howells | 4722974 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 160 | struct { |
| 161 | /* Service upgrade information */ |
| 162 | u16 from; /* Service ID to upgrade (if not 0) */ |
| 163 | u16 to; /* service ID to upgrade to */ |
| 164 | } service_upgrade; |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 165 | sa_family_t family; /* Protocol family created with */ |
David Howells | 4722974 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 166 | struct sockaddr_rxrpc srx; /* Primary Service/local addresses */ |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 167 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) |
| 171 | |
| 172 | /* |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 173 | * CPU-byteorder normalised Rx packet header. |
| 174 | */ |
| 175 | struct rxrpc_host_header { |
| 176 | u32 epoch; /* client boot timestamp */ |
| 177 | u32 cid; /* connection and channel ID */ |
| 178 | u32 callNumber; /* call ID (0 for connection-level packets) */ |
| 179 | u32 seq; /* sequence number of pkt in call stream */ |
| 180 | u32 serial; /* serial number of pkt sent to network */ |
| 181 | u8 type; /* packet type */ |
| 182 | u8 flags; /* packet flags */ |
| 183 | u8 userStatus; /* app-layer defined status */ |
| 184 | u8 securityIndex; /* security protocol ID */ |
| 185 | union { |
| 186 | u16 _rsvd; /* reserved */ |
| 187 | u16 cksum; /* kerberos security checksum */ |
| 188 | }; |
| 189 | u16 serviceId; /* service ID */ |
| 190 | } __packed; |
| 191 | |
| 192 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 193 | * RxRPC socket buffer private variables |
| 194 | * - max 48 bytes (struct sk_buff::cb) |
| 195 | */ |
| 196 | struct rxrpc_skb_priv { |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 197 | union { |
David Howells | 50235c4 | 2016-09-22 00:29:31 +0100 | [diff] [blame] | 198 | u8 nr_jumbo; /* Number of jumbo subpackets */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 199 | }; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 200 | union { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 201 | int remain; /* amount of space remaining for next write */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 202 | }; |
| 203 | |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 204 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 205 | }; |
| 206 | |
| 207 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) |
| 208 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 209 | /* |
| 210 | * RxRPC security module interface |
| 211 | */ |
| 212 | struct rxrpc_security { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 213 | const char *name; /* name of this service */ |
| 214 | u8 security_index; /* security type provided */ |
| 215 | |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 216 | /* Initialise a security service */ |
| 217 | int (*init)(void); |
| 218 | |
| 219 | /* Clean up a security service */ |
| 220 | void (*exit)(void); |
| 221 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 222 | /* initialise a connection's security */ |
| 223 | int (*init_connection_security)(struct rxrpc_connection *); |
| 224 | |
| 225 | /* prime a connection's packet security */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 226 | int (*prime_packet_security)(struct rxrpc_connection *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 227 | |
| 228 | /* impose security on a packet */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 229 | int (*secure_packet)(struct rxrpc_call *, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 230 | struct sk_buff *, |
| 231 | size_t, |
| 232 | void *); |
| 233 | |
| 234 | /* verify the security on a received packet */ |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 235 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 236 | unsigned int, unsigned int, rxrpc_seq_t, u16); |
| 237 | |
| 238 | /* Locate the data in a received packet that has been verified. */ |
| 239 | void (*locate_data)(struct rxrpc_call *, struct sk_buff *, |
| 240 | unsigned int *, unsigned int *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 241 | |
| 242 | /* issue a challenge */ |
| 243 | int (*issue_challenge)(struct rxrpc_connection *); |
| 244 | |
| 245 | /* respond to a challenge */ |
| 246 | int (*respond_to_challenge)(struct rxrpc_connection *, |
| 247 | struct sk_buff *, |
| 248 | u32 *); |
| 249 | |
| 250 | /* verify a response */ |
| 251 | int (*verify_response)(struct rxrpc_connection *, |
| 252 | struct sk_buff *, |
| 253 | u32 *); |
| 254 | |
| 255 | /* clear connection security */ |
| 256 | void (*clear)(struct rxrpc_connection *); |
| 257 | }; |
| 258 | |
| 259 | /* |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 260 | * RxRPC local transport endpoint description |
| 261 | * - owned by a single AF_RXRPC socket |
| 262 | * - pointed to by transport socket struct sk_user_data |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 263 | */ |
| 264 | struct rxrpc_local { |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 265 | struct rcu_head rcu; |
| 266 | atomic_t usage; |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 267 | struct rxrpc_net *rxnet; /* The network ns in which this resides */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 268 | struct list_head link; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 269 | struct socket *socket; /* my UDP socket */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 270 | struct work_struct processor; |
David Howells | 1e9e5c9 | 2016-09-29 22:37:15 +0100 | [diff] [blame] | 271 | struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 272 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 273 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
David Howells | 44ba069 | 2015-04-01 16:31:26 +0100 | [diff] [blame] | 274 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 275 | struct rb_root client_conns; /* Client connections by socket params */ |
| 276 | spinlock_t client_conns_lock; /* Lock for client_conns */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 277 | spinlock_t lock; /* access lock */ |
| 278 | rwlock_t services_lock; /* lock for services list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 279 | int debug_id; /* debug ID for printks */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 280 | bool dead; |
David Howells | f859ab6 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 281 | bool service_closed; /* Service socket closed */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 282 | struct sockaddr_rxrpc srx; /* local address */ |
| 283 | }; |
| 284 | |
| 285 | /* |
| 286 | * RxRPC remote transport endpoint definition |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 287 | * - matched by local endpoint, remote port, address and protocol type |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 288 | */ |
| 289 | struct rxrpc_peer { |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 290 | struct rcu_head rcu; /* This must be first */ |
| 291 | atomic_t usage; |
| 292 | unsigned long hash_key; |
| 293 | struct hlist_node hash_link; |
| 294 | struct rxrpc_local *local; |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 295 | struct hlist_head error_targets; /* targets for net error distribution */ |
| 296 | struct work_struct error_distributor; |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 297 | struct rb_root service_conns; /* Service connections */ |
David Howells | 330bdcf | 2018-08-08 11:30:02 +0100 | [diff] [blame^] | 298 | struct list_head keepalive_link; /* Link in net->peer_keepalive[] */ |
David Howells | ace45be | 2018-03-30 21:04:43 +0100 | [diff] [blame] | 299 | time64_t last_tx_at; /* Last time packet sent here */ |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 300 | seqlock_t service_conn_lock; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 301 | spinlock_t lock; /* access lock */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 302 | unsigned int if_mtu; /* interface MTU for this peer */ |
| 303 | unsigned int mtu; /* network MTU for this peer */ |
| 304 | unsigned int maxdata; /* data size (MTU - hdrsize) */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 305 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
| 306 | int debug_id; /* debug ID for printks */ |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 307 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
| 308 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 309 | struct sockaddr_rxrpc srx; /* remote address */ |
| 310 | |
| 311 | /* calculated RTT cache */ |
| 312 | #define RXRPC_RTT_CACHE_SIZE 32 |
David Howells | 0d4b103 | 2016-09-22 00:29:31 +0100 | [diff] [blame] | 313 | ktime_t rtt_last_req; /* Time of last RTT request */ |
David Howells | cf1a647 | 2016-09-22 00:41:53 +0100 | [diff] [blame] | 314 | u64 rtt; /* Current RTT estimate (in nS) */ |
| 315 | u64 rtt_sum; /* Sum of cache contents */ |
| 316 | u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */ |
| 317 | u8 rtt_cursor; /* next entry at which to insert */ |
| 318 | u8 rtt_usage; /* amount of cache actually used */ |
David Howells | f7aec12 | 2017-06-14 17:56:50 +0100 | [diff] [blame] | 319 | |
| 320 | u8 cong_cwnd; /* Congestion window size */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 321 | }; |
| 322 | |
| 323 | /* |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 324 | * Keys for matching a connection. |
| 325 | */ |
| 326 | struct rxrpc_conn_proto { |
David Howells | e8d70ce | 2016-06-30 12:16:21 +0100 | [diff] [blame] | 327 | union { |
| 328 | struct { |
| 329 | u32 epoch; /* epoch of this connection */ |
| 330 | u32 cid; /* connection ID */ |
| 331 | }; |
| 332 | u64 index_key; |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 333 | }; |
| 334 | }; |
| 335 | |
| 336 | struct rxrpc_conn_parameters { |
| 337 | struct rxrpc_local *local; /* Representation of local endpoint */ |
| 338 | struct rxrpc_peer *peer; /* Remote endpoint */ |
| 339 | struct key *key; /* Security details */ |
| 340 | bool exclusive; /* T if conn is exclusive */ |
David Howells | 4e25572 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 341 | bool upgrade; /* T if service ID can be upgraded */ |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 342 | u16 service_id; /* Service ID for this connection */ |
| 343 | u32 security_level; /* Security level selected */ |
| 344 | }; |
| 345 | |
| 346 | /* |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 347 | * Bits in the connection flags. |
| 348 | */ |
| 349 | enum rxrpc_conn_flag { |
| 350 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ |
David Howells | 001c112 | 2016-06-30 10:45:22 +0100 | [diff] [blame] | 351 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
| 352 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 353 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
| 354 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ |
| 355 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ |
David Howells | 4e25572 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 356 | RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */ |
David Howells | 3136ef4 | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 357 | RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */ |
| 358 | RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */ |
| 359 | RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */ |
| 360 | RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 361 | }; |
| 362 | |
David Howells | 3136ef4 | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 363 | #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \ |
| 364 | (1UL << RXRPC_CONN_FINAL_ACK_1) | \ |
| 365 | (1UL << RXRPC_CONN_FINAL_ACK_2) | \ |
| 366 | (1UL << RXRPC_CONN_FINAL_ACK_3)) |
| 367 | |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 368 | /* |
| 369 | * Events that can be raised upon a connection. |
| 370 | */ |
| 371 | enum rxrpc_conn_event { |
| 372 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ |
| 373 | }; |
| 374 | |
| 375 | /* |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 376 | * The connection cache state. |
| 377 | */ |
| 378 | enum rxrpc_conn_cache_state { |
| 379 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ |
| 380 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ |
| 381 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ |
David Howells | 4e25572 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 382 | RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 383 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ |
| 384 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ |
David Howells | 363deea | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 385 | RXRPC_CONN__NR_CACHE_STATES |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 386 | }; |
| 387 | |
| 388 | /* |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 389 | * The connection protocol state. |
| 390 | */ |
| 391 | enum rxrpc_conn_proto_state { |
| 392 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ |
| 393 | RXRPC_CONN_CLIENT, /* Client connection */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 394 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 395 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
| 396 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ |
| 397 | RXRPC_CONN_SERVICE, /* Service secured connection */ |
| 398 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ |
| 399 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 400 | RXRPC_CONN__NR_STATES |
| 401 | }; |
| 402 | |
| 403 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 404 | * RxRPC connection definition |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 405 | * - matched by { local, peer, epoch, conn_id, direction } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 406 | * - each connection can only handle four simultaneous calls |
| 407 | */ |
| 408 | struct rxrpc_connection { |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 409 | struct rxrpc_conn_proto proto; |
| 410 | struct rxrpc_conn_parameters params; |
| 411 | |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 412 | atomic_t usage; |
| 413 | struct rcu_head rcu; |
| 414 | struct list_head cache_link; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 415 | |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 416 | spinlock_t channel_lock; |
| 417 | unsigned char active_chans; /* Mask of active channels */ |
| 418 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) |
| 419 | struct list_head waiting_calls; /* Calls waiting for channels */ |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 420 | struct rxrpc_channel { |
David Howells | 3136ef4 | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 421 | unsigned long final_ack_at; /* Time at which to issue final ACK */ |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 422 | struct rxrpc_call __rcu *call; /* Active call */ |
| 423 | u32 call_id; /* ID of current call */ |
| 424 | u32 call_counter; /* Call ID counter */ |
| 425 | u32 last_call; /* ID of last call */ |
David Howells | 18bfeba | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 426 | u8 last_type; /* Type of last packet */ |
David Howells | 18bfeba | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 427 | union { |
| 428 | u32 last_seq; |
| 429 | u32 last_abort; |
| 430 | }; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 431 | } channels[RXRPC_MAXCALLS]; |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 432 | |
David Howells | 3136ef4 | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 433 | struct timer_list timer; /* Conn event timer */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 434 | struct work_struct processor; /* connection event processor */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 435 | union { |
| 436 | struct rb_node client_node; /* Node in local->client_conns */ |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 437 | struct rb_node service_node; /* Node in peer->service_conns */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 438 | }; |
David Howells | 4d028b2 | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 439 | struct list_head proc_link; /* link in procfs list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 440 | struct list_head link; /* link in master connection list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 441 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 442 | const struct rxrpc_security *security; /* applied security module */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 443 | struct key *server_key; /* security for this service */ |
Herbert Xu | 1afe593 | 2016-01-24 21:19:01 +0800 | [diff] [blame] | 444 | struct crypto_skcipher *cipher; /* encryption handle */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 445 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 446 | unsigned long flags; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 447 | unsigned long events; |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 448 | unsigned long idle_timestamp; /* Time at which last became idle */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 449 | spinlock_t state_lock; /* state-change lock */ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 450 | enum rxrpc_conn_cache_state cache_state; |
| 451 | enum rxrpc_conn_proto_state state; /* current state of connection */ |
David Howells | dc44b3a | 2016-04-07 17:23:30 +0100 | [diff] [blame] | 452 | u32 local_abort; /* local abort code */ |
| 453 | u32 remote_abort; /* remote abort code */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 454 | int debug_id; /* debug ID for printks */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 455 | atomic_t serial; /* packet serial number counter */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 456 | unsigned int hi_serial; /* highest serial number received */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 457 | u32 security_nonce; /* response re-use preventer */ |
David Howells | 68d6d1a | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 458 | u16 service_id; /* Service ID, possibly upgraded */ |
David Howells | 5a924b8 | 2016-09-22 00:29:31 +0100 | [diff] [blame] | 459 | u8 size_align; /* data size alignment (for security) */ |
| 460 | u8 security_size; /* security header size */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 461 | u8 security_ix; /* security type */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 462 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
| 463 | }; |
| 464 | |
| 465 | /* |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 466 | * Flags in call->flags. |
| 467 | */ |
| 468 | enum rxrpc_call_flag { |
| 469 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 470 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 471 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 472 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 473 | RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ |
| 474 | RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ |
David Howells | c038a58 | 2017-08-29 10:19:01 +0100 | [diff] [blame] | 475 | RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */ |
David Howells | a5af7e1 | 2016-10-06 08:11:49 +0100 | [diff] [blame] | 476 | RXRPC_CALL_SEND_PING, /* A ping will need to be sent */ |
David Howells | 8e83134 | 2016-09-22 00:29:31 +0100 | [diff] [blame] | 477 | RXRPC_CALL_PINGING, /* Ping in process */ |
David Howells | 5749434 | 2016-09-24 18:05:27 +0100 | [diff] [blame] | 478 | RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */ |
David Howells | c54e43d | 2018-05-10 23:26:00 +0100 | [diff] [blame] | 479 | RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */ |
David Howells | 1a02502 | 2018-06-03 02:17:39 +0100 | [diff] [blame] | 480 | RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 481 | }; |
| 482 | |
| 483 | /* |
| 484 | * Events that can be raised on a call. |
| 485 | */ |
| 486 | enum rxrpc_call_event { |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 487 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 488 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 489 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ |
David Howells | a5af7e1 | 2016-10-06 08:11:49 +0100 | [diff] [blame] | 490 | RXRPC_CALL_EV_PING, /* Ping send required */ |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 491 | RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */ |
David Howells | bd1fdf8 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 492 | RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 493 | }; |
| 494 | |
| 495 | /* |
| 496 | * The states that a call can be in. |
| 497 | */ |
| 498 | enum rxrpc_call_state { |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 499 | RXRPC_CALL_UNINITIALISED, |
| 500 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 501 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
| 502 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ |
| 503 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 504 | RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 505 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
| 506 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ |
| 507 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ |
| 508 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ |
| 509 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ |
| 510 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 511 | RXRPC_CALL_COMPLETE, /* - call complete */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 512 | NR__RXRPC_CALL_STATES |
| 513 | }; |
| 514 | |
| 515 | /* |
David Howells | 5749434 | 2016-09-24 18:05:27 +0100 | [diff] [blame] | 516 | * Call Tx congestion management modes. |
| 517 | */ |
| 518 | enum rxrpc_congest_mode { |
| 519 | RXRPC_CALL_SLOW_START, |
| 520 | RXRPC_CALL_CONGEST_AVOIDANCE, |
| 521 | RXRPC_CALL_PACKET_LOSS, |
| 522 | RXRPC_CALL_FAST_RETRANSMIT, |
| 523 | NR__RXRPC_CONGEST_MODES |
| 524 | }; |
| 525 | |
| 526 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 527 | * RxRPC call definition |
| 528 | * - matched by { connection, call_id } |
| 529 | */ |
| 530 | struct rxrpc_call { |
David Howells | dee4636 | 2016-06-27 17:11:19 +0100 | [diff] [blame] | 531 | struct rcu_head rcu; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 532 | struct rxrpc_connection *conn; /* connection carrying call */ |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 533 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 534 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
David Howells | d3be4d2 | 2018-03-30 21:05:23 +0100 | [diff] [blame] | 535 | struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ |
David Howells | 540b1c4 | 2017-02-27 15:43:06 +0000 | [diff] [blame] | 536 | struct mutex user_mutex; /* User access mutex */ |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 537 | unsigned long ack_at; /* When deferred ACK needs to happen */ |
David Howells | bd1fdf8 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 538 | unsigned long ack_lost_at; /* When ACK is figured as lost */ |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 539 | unsigned long resend_at; /* When next resend needs to happen */ |
| 540 | unsigned long ping_at; /* When next to send a ping */ |
David Howells | 415f44e | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 541 | unsigned long keepalive_at; /* When next to send a keepalive ping */ |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 542 | unsigned long expect_rx_by; /* When we expect to get a packet by */ |
| 543 | unsigned long expect_req_by; /* When we expect to get a request DATA packet by */ |
| 544 | unsigned long expect_term_by; /* When we expect call termination by */ |
| 545 | u32 next_rx_timo; /* Timeout for next Rx packet (jif) */ |
| 546 | u32 next_req_timo; /* Timeout for next Rx request packet (jif) */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 547 | struct timer_list timer; /* Combined event timer */ |
| 548 | struct work_struct processor; /* Event processor */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 549 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 550 | struct list_head link; /* link in master call list */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 551 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 552 | struct hlist_node error_link; /* link in error distribution list */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 553 | struct list_head accept_link; /* Link in rx->acceptq */ |
| 554 | struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ |
| 555 | struct list_head sock_link; /* Link in rx->sock_calls */ |
| 556 | struct rb_node sock_node; /* Node in rx->calls */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 557 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 558 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
David Howells | e754eba | 2017-06-07 12:40:03 +0100 | [diff] [blame] | 559 | s64 tx_total_len; /* Total length left to be transmitted (or -1) */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 560 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 561 | unsigned long user_call_ID; /* user-defined call ID */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 562 | unsigned long flags; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 563 | unsigned long events; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 564 | spinlock_t lock; |
David Howells | 20acbd9 | 2017-11-02 15:06:08 +0000 | [diff] [blame] | 565 | spinlock_t notify_lock; /* Kernel notification lock */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 566 | rwlock_t state_lock; /* lock for state transition */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 567 | u32 abort_code; /* Local/remote abort code */ |
| 568 | int error; /* Local error incurred */ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 569 | enum rxrpc_call_state state; /* current state of call */ |
| 570 | enum rxrpc_call_completion completion; /* Call completion condition */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 571 | atomic_t usage; |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 572 | u16 service_id; /* service ID */ |
David Howells | 278ac0c | 2016-09-07 15:19:25 +0100 | [diff] [blame] | 573 | u8 security_ix; /* Security type */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 574 | u32 call_id; /* call ID on connection */ |
| 575 | u32 cid; /* connection ID plus channel index */ |
| 576 | int debug_id; /* debug ID for printks */ |
David Howells | 8e83134 | 2016-09-22 00:29:31 +0100 | [diff] [blame] | 577 | unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ |
| 578 | unsigned short rx_pkt_len; /* Current recvmsg packet len */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 579 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 580 | /* Rx/Tx circular buffer, depending on phase. |
| 581 | * |
| 582 | * In the Rx phase, packets are annotated with 0 or the number of the |
| 583 | * segment of a jumbo packet each buffer refers to. There can be up to |
| 584 | * 47 segments in a maximum-size UDP packet. |
| 585 | * |
| 586 | * In the Tx phase, packets are annotated with which buffers have been |
| 587 | * acked. |
| 588 | */ |
| 589 | #define RXRPC_RXTX_BUFF_SIZE 64 |
| 590 | #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) |
David Howells | 75e4212 | 2016-09-13 22:36:22 +0100 | [diff] [blame] | 591 | #define RXRPC_INIT_RX_WINDOW_SIZE 32 |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 592 | struct sk_buff **rxtx_buffer; |
| 593 | u8 *rxtx_annotations; |
| 594 | #define RXRPC_TX_ANNO_ACK 0 |
| 595 | #define RXRPC_TX_ANNO_UNACK 1 |
| 596 | #define RXRPC_TX_ANNO_NAK 2 |
| 597 | #define RXRPC_TX_ANNO_RETRANS 3 |
David Howells | f07373e | 2016-09-22 00:29:32 +0100 | [diff] [blame] | 598 | #define RXRPC_TX_ANNO_MASK 0x03 |
David Howells | 70790dbe | 2016-09-23 12:39:22 +0100 | [diff] [blame] | 599 | #define RXRPC_TX_ANNO_LAST 0x04 |
| 600 | #define RXRPC_TX_ANNO_RESENT 0x08 |
| 601 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 602 | #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ |
| 603 | #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ |
| 604 | #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ |
| 605 | rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but |
| 606 | * not hard-ACK'd packet follows this. |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 607 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 608 | rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ |
David Howells | 5749434 | 2016-09-24 18:05:27 +0100 | [diff] [blame] | 609 | |
| 610 | /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS |
| 611 | * is fixed, we keep these numbers in terms of segments (ie. DATA |
| 612 | * packets) rather than bytes. |
| 613 | */ |
| 614 | #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN |
| 615 | u8 cong_cwnd; /* Congestion window size */ |
| 616 | u8 cong_extra; /* Extra to send for congestion management */ |
| 617 | u8 cong_ssthresh; /* Slow-start threshold */ |
| 618 | enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */ |
| 619 | u8 cong_dup_acks; /* Count of ACKs showing missing packets */ |
| 620 | u8 cong_cumul_acks; /* Cumulative ACK count */ |
| 621 | ktime_t cong_tstamp; /* Last time cwnd was changed */ |
| 622 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 623 | rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not |
| 624 | * consumed packet follows this. |
| 625 | */ |
| 626 | rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ |
| 627 | rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ |
David Howells | 1a02502 | 2018-06-03 02:17:39 +0100 | [diff] [blame] | 628 | rxrpc_serial_t rx_serial; /* Highest serial received for this call */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 629 | u8 rx_winsize; /* Size of Rx window */ |
| 630 | u8 tx_winsize; /* Maximum size of Tx window */ |
David Howells | 71f3ca4 | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 631 | bool tx_phase; /* T if transmission phase, F if receive phase */ |
David Howells | 75e4212 | 2016-09-13 22:36:22 +0100 | [diff] [blame] | 632 | u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 633 | |
| 634 | /* receive-phase ACK management */ |
David Howells | 4e36a95 | 2009-09-16 00:01:13 -0700 | [diff] [blame] | 635 | u8 ackr_reason; /* reason to ACK */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 636 | u16 ackr_skew; /* skew on packet being ACK'd */ |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 637 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 638 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
David Howells | 805b21b | 2016-09-24 18:05:26 +0100 | [diff] [blame] | 639 | rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */ |
| 640 | rxrpc_seq_t ackr_seen; /* Highest packet shown seen */ |
David Howells | a5af7e1 | 2016-10-06 08:11:49 +0100 | [diff] [blame] | 641 | |
| 642 | /* ping management */ |
| 643 | rxrpc_serial_t ping_serial; /* Last ping sent */ |
| 644 | ktime_t ping_time; /* Time last ping sent */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 645 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 646 | /* transmission-phase ACK management */ |
David Howells | 5749434 | 2016-09-24 18:05:27 +0100 | [diff] [blame] | 647 | ktime_t acks_latest_ts; /* Timestamp of latest ACK received */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 648 | rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ |
David Howells | 31a1b989 | 2016-09-24 18:05:26 +0100 | [diff] [blame] | 649 | rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */ |
David Howells | bd1fdf8 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 650 | rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */ |
| 651 | rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */ |
David Howells | 31a1b989 | 2016-09-24 18:05:26 +0100 | [diff] [blame] | 652 | }; |
| 653 | |
| 654 | /* |
David Howells | 5749434 | 2016-09-24 18:05:27 +0100 | [diff] [blame] | 655 | * Summary of a new ACK and the changes it made to the Tx buffer packet states. |
David Howells | 31a1b989 | 2016-09-24 18:05:26 +0100 | [diff] [blame] | 656 | */ |
| 657 | struct rxrpc_ack_summary { |
| 658 | u8 ack_reason; |
| 659 | u8 nr_acks; /* Number of ACKs in packet */ |
| 660 | u8 nr_nacks; /* Number of NACKs in packet */ |
| 661 | u8 nr_new_acks; /* Number of new ACKs in packet */ |
| 662 | u8 nr_new_nacks; /* Number of new NACKs in packet */ |
| 663 | u8 nr_rot_new_acks; /* Number of rotated new ACKs */ |
| 664 | bool new_low_nack; /* T if new low NACK found */ |
David Howells | 5749434 | 2016-09-24 18:05:27 +0100 | [diff] [blame] | 665 | bool retrans_timeo; /* T if reTx due to timeout happened */ |
| 666 | u8 flight_size; /* Number of unreceived transmissions */ |
| 667 | /* Place to stash values for tracing */ |
| 668 | enum rxrpc_congest_mode mode:8; |
| 669 | u8 cwnd; |
| 670 | u8 ssthresh; |
| 671 | u8 dup_acks; |
| 672 | u8 cumulative_acks; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 673 | }; |
| 674 | |
David Howells | 4812417 | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 675 | /* |
| 676 | * sendmsg() cmsg-specified parameters. |
| 677 | */ |
| 678 | enum rxrpc_command { |
| 679 | RXRPC_CMD_SEND_DATA, /* send data message */ |
| 680 | RXRPC_CMD_SEND_ABORT, /* request abort generation */ |
| 681 | RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ |
| 682 | RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ |
| 683 | }; |
| 684 | |
| 685 | struct rxrpc_call_params { |
| 686 | s64 tx_total_len; /* Total Tx data length (if send data) */ |
| 687 | unsigned long user_call_ID; /* User's call ID */ |
| 688 | struct { |
| 689 | u32 hard; /* Maximum lifetime (sec) */ |
| 690 | u32 idle; /* Max time since last data packet (msec) */ |
| 691 | u32 normal; /* Max time since last call packet (msec) */ |
| 692 | } timeouts; |
| 693 | u8 nr_timeouts; /* Number of timeouts specified */ |
| 694 | }; |
| 695 | |
| 696 | struct rxrpc_send_params { |
| 697 | struct rxrpc_call_params call; |
| 698 | u32 abort_code; /* Abort code to Tx (if abort) */ |
| 699 | enum rxrpc_command command : 8; /* The command to implement */ |
| 700 | bool exclusive; /* Shared or exclusive call */ |
| 701 | bool upgrade; /* If the connection is upgradeable */ |
| 702 | }; |
| 703 | |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 704 | #include <trace/events/rxrpc.h> |
| 705 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 706 | /* |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 707 | * af_rxrpc.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 708 | */ |
David Howells | 71f3ca4 | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 709 | extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs; |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 710 | extern struct workqueue_struct *rxrpc_workqueue; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 711 | |
| 712 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 713 | * call_accept.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 714 | */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 715 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
| 716 | void rxrpc_discard_prealloc(struct rxrpc_sock *); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 717 | struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, |
| 718 | struct rxrpc_connection *, |
| 719 | struct sk_buff *); |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 720 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 721 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
| 722 | rxrpc_notify_rx_t); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 723 | int rxrpc_reject_call(struct rxrpc_sock *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 724 | |
| 725 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 726 | * call_event.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 727 | */ |
David Howells | 9c7ad43 | 2016-09-23 13:50:40 +0100 | [diff] [blame] | 728 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool, |
| 729 | enum rxrpc_propose_ack_trace); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 730 | void rxrpc_process_call(struct work_struct *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 731 | |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 732 | static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call, |
| 733 | unsigned long expire_at, |
| 734 | unsigned long now, |
| 735 | enum rxrpc_timer_trace why) |
| 736 | { |
| 737 | trace_rxrpc_timer(call, why, now); |
| 738 | timer_reduce(&call->timer, expire_at); |
| 739 | } |
| 740 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 741 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 742 | * call_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 743 | */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 744 | extern const char *const rxrpc_call_states[]; |
| 745 | extern const char *const rxrpc_call_completions[]; |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 746 | extern unsigned int rxrpc_max_call_lifetime; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 747 | extern struct kmem_cache *rxrpc_call_jar; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 748 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 749 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
David Howells | a25e21f | 2018-03-27 23:03:00 +0100 | [diff] [blame] | 750 | struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 751 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 752 | struct rxrpc_conn_parameters *, |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 753 | struct sockaddr_rxrpc *, |
David Howells | a25e21f | 2018-03-27 23:03:00 +0100 | [diff] [blame] | 754 | struct rxrpc_call_params *, gfp_t, |
| 755 | unsigned int); |
David Howells | c038a58 | 2017-08-29 10:19:01 +0100 | [diff] [blame] | 756 | int rxrpc_retry_client_call(struct rxrpc_sock *, |
| 757 | struct rxrpc_call *, |
| 758 | struct rxrpc_conn_parameters *, |
| 759 | struct sockaddr_rxrpc *, |
| 760 | gfp_t); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 761 | void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, |
| 762 | struct sk_buff *); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 763 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
David Howells | c038a58 | 2017-08-29 10:19:01 +0100 | [diff] [blame] | 764 | int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 765 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 766 | bool __rxrpc_queue_call(struct rxrpc_call *); |
| 767 | bool rxrpc_queue_call(struct rxrpc_call *); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 768 | void rxrpc_see_call(struct rxrpc_call *); |
David Howells | fff72429 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 769 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
| 770 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 771 | void rxrpc_cleanup_call(struct rxrpc_call *); |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 772 | void rxrpc_destroy_all_calls(struct rxrpc_net *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 773 | |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 774 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
| 775 | { |
| 776 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); |
| 777 | } |
| 778 | |
| 779 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) |
| 780 | { |
| 781 | return !rxrpc_is_service_call(call); |
| 782 | } |
| 783 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 784 | /* |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 785 | * Transition a call to the complete state. |
| 786 | */ |
| 787 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, |
| 788 | enum rxrpc_call_completion compl, |
| 789 | u32 abort_code, |
| 790 | int error) |
| 791 | { |
| 792 | if (call->state < RXRPC_CALL_COMPLETE) { |
| 793 | call->abort_code = abort_code; |
| 794 | call->error = error; |
| 795 | call->completion = compl, |
| 796 | call->state = RXRPC_CALL_COMPLETE; |
David Howells | 1bae5d2 | 2018-03-27 23:08:20 +0100 | [diff] [blame] | 797 | trace_rxrpc_call_complete(call); |
David Howells | c0d058c | 2016-09-23 12:39:23 +0100 | [diff] [blame] | 798 | wake_up(&call->waitq); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 799 | return true; |
| 800 | } |
| 801 | return false; |
| 802 | } |
| 803 | |
| 804 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, |
| 805 | enum rxrpc_call_completion compl, |
| 806 | u32 abort_code, |
| 807 | int error) |
| 808 | { |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 809 | bool ret; |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 810 | |
| 811 | write_lock_bh(&call->state_lock); |
| 812 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); |
| 813 | write_unlock_bh(&call->state_lock); |
| 814 | return ret; |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * Record that a call successfully completed. |
| 819 | */ |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 820 | static inline bool __rxrpc_call_completed(struct rxrpc_call *call) |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 821 | { |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 822 | return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 823 | } |
| 824 | |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 825 | static inline bool rxrpc_call_completed(struct rxrpc_call *call) |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 826 | { |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 827 | bool ret; |
| 828 | |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 829 | write_lock_bh(&call->state_lock); |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 830 | ret = __rxrpc_call_completed(call); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 831 | write_unlock_bh(&call->state_lock); |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 832 | return ret; |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Record that a call is locally aborted. |
| 837 | */ |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 838 | static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
| 839 | rxrpc_seq_t seq, |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 840 | u32 abort_code, int error) |
| 841 | { |
David Howells | a25e21f | 2018-03-27 23:03:00 +0100 | [diff] [blame] | 842 | trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq, |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 843 | abort_code, error); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 844 | return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, |
| 845 | abort_code, error); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 846 | } |
| 847 | |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 848 | static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
| 849 | rxrpc_seq_t seq, u32 abort_code, int error) |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 850 | { |
| 851 | bool ret; |
| 852 | |
| 853 | write_lock_bh(&call->state_lock); |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 854 | ret = __rxrpc_abort_call(why, call, seq, abort_code, error); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 855 | write_unlock_bh(&call->state_lock); |
| 856 | return ret; |
| 857 | } |
| 858 | |
| 859 | /* |
David Howells | fb46f6e | 2017-04-06 10:12:00 +0100 | [diff] [blame] | 860 | * Abort a call due to a protocol error. |
| 861 | */ |
| 862 | static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call, |
| 863 | struct sk_buff *skb, |
| 864 | const char *eproto_why, |
| 865 | const char *why, |
| 866 | u32 abort_code) |
| 867 | { |
| 868 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
| 869 | |
| 870 | trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why); |
| 871 | return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO); |
| 872 | } |
| 873 | |
| 874 | #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \ |
| 875 | __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \ |
| 876 | (abort_why), (abort_code)) |
| 877 | |
| 878 | /* |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 879 | * conn_client.c |
| 880 | */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 881 | extern unsigned int rxrpc_max_client_connections; |
| 882 | extern unsigned int rxrpc_reap_client_connections; |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 883 | extern unsigned long rxrpc_conn_idle_client_expiry; |
| 884 | extern unsigned long rxrpc_conn_idle_client_fast_expiry; |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 885 | extern struct idr rxrpc_client_conn_ids; |
| 886 | |
David Howells | eb9b9d2 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 887 | void rxrpc_destroy_client_conn_ids(void); |
David Howells | c6d2b8d | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 888 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
| 889 | struct sockaddr_rxrpc *, gfp_t); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 890 | void rxrpc_expose_client_call(struct rxrpc_call *); |
| 891 | void rxrpc_disconnect_client_call(struct rxrpc_call *); |
| 892 | void rxrpc_put_client_conn(struct rxrpc_connection *); |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 893 | void rxrpc_discard_expired_client_conns(struct work_struct *); |
| 894 | void rxrpc_destroy_all_client_connections(struct rxrpc_net *); |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 895 | |
| 896 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 897 | * conn_event.c |
| 898 | */ |
| 899 | void rxrpc_process_connection(struct work_struct *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 900 | |
| 901 | /* |
| 902 | * conn_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 903 | */ |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 904 | extern unsigned int rxrpc_connection_expiry; |
David Howells | f859ab6 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 905 | extern unsigned int rxrpc_closed_conn_expiry; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 906 | |
David Howells | c6d2b8d | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 907 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 908 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
| 909 | struct sk_buff *); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 910 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 911 | void rxrpc_disconnect_call(struct rxrpc_call *); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 912 | void rxrpc_kill_connection(struct rxrpc_connection *); |
David Howells | 363deea | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 913 | bool rxrpc_queue_conn(struct rxrpc_connection *); |
| 914 | void rxrpc_see_connection(struct rxrpc_connection *); |
| 915 | void rxrpc_get_connection(struct rxrpc_connection *); |
| 916 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *); |
| 917 | void rxrpc_put_service_conn(struct rxrpc_connection *); |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 918 | void rxrpc_service_connection_reaper(struct work_struct *); |
| 919 | void rxrpc_destroy_all_connections(struct rxrpc_net *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 920 | |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 921 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
| 922 | { |
| 923 | return conn->out_clientflag; |
| 924 | } |
| 925 | |
| 926 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) |
| 927 | { |
David Howells | e8d70ce | 2016-06-30 12:16:21 +0100 | [diff] [blame] | 928 | return !rxrpc_conn_is_client(conn); |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 929 | } |
| 930 | |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 931 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
| 932 | { |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 933 | if (!conn) |
| 934 | return; |
| 935 | |
David Howells | 363deea | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 936 | if (rxrpc_conn_is_client(conn)) |
| 937 | rxrpc_put_client_conn(conn); |
| 938 | else |
| 939 | rxrpc_put_service_conn(conn); |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 940 | } |
| 941 | |
David Howells | 3136ef4 | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 942 | static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn, |
| 943 | unsigned long expire_at) |
| 944 | { |
| 945 | timer_reduce(&conn->timer, expire_at); |
| 946 | } |
| 947 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 948 | /* |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 949 | * conn_service.c |
| 950 | */ |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 951 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
| 952 | struct sk_buff *); |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 953 | struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t); |
David Howells | 4722974 | 2017-06-05 14:30:49 +0100 | [diff] [blame] | 954 | void rxrpc_new_incoming_connection(struct rxrpc_sock *, |
| 955 | struct rxrpc_connection *, struct sk_buff *); |
David Howells | 001c112 | 2016-06-30 10:45:22 +0100 | [diff] [blame] | 956 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 957 | |
| 958 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 959 | * input.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 960 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 961 | void rxrpc_data_ready(struct sock *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 962 | |
| 963 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 964 | * insecure.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 965 | */ |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 966 | extern const struct rxrpc_security rxrpc_no_security; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 967 | |
| 968 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 969 | * key.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 970 | */ |
| 971 | extern struct key_type key_type_rxrpc; |
| 972 | extern struct key_type key_type_rxrpc_s; |
| 973 | |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 974 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
| 975 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); |
Baolin Wang | 10674a0 | 2017-08-29 10:15:40 +0100 | [diff] [blame] | 976 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t, |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 977 | u32); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 978 | |
| 979 | /* |
David Howells | 8756361 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 980 | * local_event.c |
| 981 | */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 982 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
David Howells | 8756361 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 983 | |
| 984 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 985 | * local_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 986 | */ |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 987 | struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *); |
David Howells | 09d2bf5 | 2018-03-30 21:05:28 +0100 | [diff] [blame] | 988 | struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *); |
| 989 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *); |
| 990 | void rxrpc_put_local(struct rxrpc_local *); |
| 991 | void rxrpc_queue_local(struct rxrpc_local *); |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 992 | void rxrpc_destroy_all_locals(struct rxrpc_net *); |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 993 | |
| 994 | /* |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 995 | * misc.c |
| 996 | */ |
David Howells | 0e119b4 | 2016-06-10 22:30:37 +0100 | [diff] [blame] | 997 | extern unsigned int rxrpc_max_backlog __read_mostly; |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 998 | extern unsigned long rxrpc_requested_ack_delay; |
| 999 | extern unsigned long rxrpc_soft_ack_delay; |
| 1000 | extern unsigned long rxrpc_idle_ack_delay; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 1001 | extern unsigned int rxrpc_rx_window_size; |
| 1002 | extern unsigned int rxrpc_rx_mtu; |
| 1003 | extern unsigned int rxrpc_rx_jumbo_max; |
David Howells | a158bdd | 2017-11-24 10:18:41 +0000 | [diff] [blame] | 1004 | extern unsigned long rxrpc_resend_timeout; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 1005 | |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 1006 | extern const s8 rxrpc_ack_priority[]; |
| 1007 | |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 1008 | /* |
David Howells | 2baec2c | 2017-05-24 17:02:32 +0100 | [diff] [blame] | 1009 | * net_ns.c |
| 1010 | */ |
| 1011 | extern unsigned int rxrpc_net_id; |
| 1012 | extern struct pernet_operations rxrpc_net_ops; |
| 1013 | |
| 1014 | static inline struct rxrpc_net *rxrpc_net(struct net *net) |
| 1015 | { |
| 1016 | return net_generic(net, rxrpc_net_id); |
| 1017 | } |
| 1018 | |
| 1019 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1020 | * output.c |
| 1021 | */ |
David Howells | bd1fdf8 | 2017-11-24 10:18:42 +0000 | [diff] [blame] | 1022 | int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *); |
David Howells | 26cb02a | 2016-10-06 08:11:49 +0100 | [diff] [blame] | 1023 | int rxrpc_send_abort_packet(struct rxrpc_call *); |
David Howells | a176707 | 2016-09-29 22:37:15 +0100 | [diff] [blame] | 1024 | int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 1025 | void rxrpc_reject_packets(struct rxrpc_local *); |
David Howells | ace45be | 2018-03-30 21:04:43 +0100 | [diff] [blame] | 1026 | void rxrpc_send_keepalive(struct rxrpc_peer *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1027 | |
| 1028 | /* |
David Howells | abe89ef | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 1029 | * peer_event.c |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1030 | */ |
David Howells | abe89ef | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 1031 | void rxrpc_error_report(struct sock *); |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 1032 | void rxrpc_peer_error_distributor(struct work_struct *); |
David Howells | cf1a647 | 2016-09-22 00:41:53 +0100 | [diff] [blame] | 1033 | void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, |
| 1034 | rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t); |
David Howells | ace45be | 2018-03-30 21:04:43 +0100 | [diff] [blame] | 1035 | void rxrpc_peer_keepalive_worker(struct work_struct *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1036 | |
| 1037 | /* |
| 1038 | * peer_object.c |
| 1039 | */ |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 1040 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
| 1041 | const struct sockaddr_rxrpc *); |
| 1042 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, |
| 1043 | struct sockaddr_rxrpc *, gfp_t); |
| 1044 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 1045 | struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, |
| 1046 | struct rxrpc_peer *); |
David Howells | 17226f1 | 2018-03-30 21:05:44 +0100 | [diff] [blame] | 1047 | void rxrpc_destroy_all_peers(struct rxrpc_net *); |
David Howells | 1159d4b | 2018-03-30 21:05:38 +0100 | [diff] [blame] | 1048 | struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *); |
| 1049 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *); |
| 1050 | void rxrpc_put_peer(struct rxrpc_peer *); |
| 1051 | void __rxrpc_queue_peer_error(struct rxrpc_peer *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1052 | |
| 1053 | /* |
| 1054 | * proc.c |
| 1055 | */ |
Christoph Hellwig | c350637 | 2018-04-10 19:42:55 +0200 | [diff] [blame] | 1056 | extern const struct seq_operations rxrpc_call_seq_ops; |
| 1057 | extern const struct seq_operations rxrpc_connection_seq_ops; |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1058 | |
| 1059 | /* |
| 1060 | * recvmsg.c |
| 1061 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 1062 | void rxrpc_notify_socket(struct rxrpc_call *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1063 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
| 1064 | |
| 1065 | /* |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 1066 | * rxkad.c |
| 1067 | */ |
| 1068 | #ifdef CONFIG_RXKAD |
| 1069 | extern const struct rxrpc_security rxkad; |
| 1070 | #endif |
| 1071 | |
| 1072 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1073 | * security.c |
| 1074 | */ |
| 1075 | int __init rxrpc_init_security(void); |
| 1076 | void rxrpc_exit_security(void); |
| 1077 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
| 1078 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); |
David Howells | 71a17de | 2016-09-07 14:43:39 +0100 | [diff] [blame] | 1079 | |
David Howells | 0b58b8a | 2016-09-02 22:39:45 +0100 | [diff] [blame] | 1080 | /* |
| 1081 | * sendmsg.c |
| 1082 | */ |
| 1083 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1084 | |
| 1085 | /* |
| 1086 | * skbuff.c |
| 1087 | */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 1088 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1089 | void rxrpc_packet_destructor(struct sk_buff *); |
David Howells | 71f3ca4 | 2016-09-17 10:49:14 +0100 | [diff] [blame] | 1090 | void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace); |
| 1091 | void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace); |
| 1092 | void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace); |
| 1093 | void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace); |
| 1094 | void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace); |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 1095 | void rxrpc_purge_queue(struct sk_buff_head *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 1096 | |
| 1097 | /* |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 1098 | * sysctl.c |
| 1099 | */ |
| 1100 | #ifdef CONFIG_SYSCTL |
| 1101 | extern int __init rxrpc_sysctl_init(void); |
| 1102 | extern void rxrpc_sysctl_exit(void); |
| 1103 | #else |
| 1104 | static inline int __init rxrpc_sysctl_init(void) { return 0; } |
| 1105 | static inline void rxrpc_sysctl_exit(void) {} |
| 1106 | #endif |
| 1107 | |
| 1108 | /* |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 1109 | * utils.c |
| 1110 | */ |
David Howells | 7b674e3 | 2017-08-29 10:18:37 +0100 | [diff] [blame] | 1111 | int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *, |
| 1112 | struct sk_buff *); |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 1113 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 1114 | static inline bool before(u32 seq1, u32 seq2) |
| 1115 | { |
| 1116 | return (s32)(seq1 - seq2) < 0; |
| 1117 | } |
| 1118 | static inline bool before_eq(u32 seq1, u32 seq2) |
| 1119 | { |
| 1120 | return (s32)(seq1 - seq2) <= 0; |
| 1121 | } |
| 1122 | static inline bool after(u32 seq1, u32 seq2) |
| 1123 | { |
| 1124 | return (s32)(seq1 - seq2) > 0; |
| 1125 | } |
| 1126 | static inline bool after_eq(u32 seq1, u32 seq2) |
| 1127 | { |
| 1128 | return (s32)(seq1 - seq2) >= 0; |
| 1129 | } |
| 1130 | |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 1131 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1132 | * debug tracing |
| 1133 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1134 | extern unsigned int rxrpc_debug; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1135 | |
| 1136 | #define dbgprintk(FMT,...) \ |
Sven Schnelle | 9f389f4 | 2008-04-03 10:45:30 +0100 | [diff] [blame] | 1137 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1138 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 1139 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 1140 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1141 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 1142 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) |
| 1143 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) |
| 1144 | |
| 1145 | |
| 1146 | #if defined(__KDEBUG) |
| 1147 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 1148 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 1149 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 1150 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) |
| 1151 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) |
| 1152 | |
| 1153 | #elif defined(CONFIG_AF_RXRPC_DEBUG) |
| 1154 | #define RXRPC_DEBUG_KENTER 0x01 |
| 1155 | #define RXRPC_DEBUG_KLEAVE 0x02 |
| 1156 | #define RXRPC_DEBUG_KDEBUG 0x04 |
| 1157 | #define RXRPC_DEBUG_KPROTO 0x08 |
| 1158 | #define RXRPC_DEBUG_KNET 0x10 |
| 1159 | |
| 1160 | #define _enter(FMT,...) \ |
| 1161 | do { \ |
| 1162 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ |
| 1163 | kenter(FMT,##__VA_ARGS__); \ |
| 1164 | } while (0) |
| 1165 | |
| 1166 | #define _leave(FMT,...) \ |
| 1167 | do { \ |
| 1168 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ |
| 1169 | kleave(FMT,##__VA_ARGS__); \ |
| 1170 | } while (0) |
| 1171 | |
| 1172 | #define _debug(FMT,...) \ |
| 1173 | do { \ |
| 1174 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ |
| 1175 | kdebug(FMT,##__VA_ARGS__); \ |
| 1176 | } while (0) |
| 1177 | |
| 1178 | #define _proto(FMT,...) \ |
| 1179 | do { \ |
| 1180 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ |
| 1181 | kproto(FMT,##__VA_ARGS__); \ |
| 1182 | } while (0) |
| 1183 | |
| 1184 | #define _net(FMT,...) \ |
| 1185 | do { \ |
| 1186 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ |
| 1187 | knet(FMT,##__VA_ARGS__); \ |
| 1188 | } while (0) |
| 1189 | |
| 1190 | #else |
David Howells | 12fdff3 | 2010-08-12 16:54:57 +0100 | [diff] [blame] | 1191 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 1192 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 1193 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| 1194 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) |
| 1195 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1196 | #endif |
| 1197 | |
| 1198 | /* |
| 1199 | * debug assertion checking |
| 1200 | */ |
| 1201 | #if 1 // defined(__KDEBUGALL) |
| 1202 | |
| 1203 | #define ASSERT(X) \ |
| 1204 | do { \ |
| 1205 | if (unlikely(!(X))) { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1206 | pr_err("Assertion failed\n"); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1207 | BUG(); \ |
| 1208 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1209 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1210 | |
| 1211 | #define ASSERTCMP(X, OP, Y) \ |
| 1212 | do { \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1213 | __typeof__(X) _x = (X); \ |
| 1214 | __typeof__(Y) _y = (__typeof__(X))(Y); \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1215 | if (unlikely(!(_x OP _y))) { \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1216 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
| 1217 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
| 1218 | (unsigned long)_y, (unsigned long)_y); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1219 | BUG(); \ |
| 1220 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1221 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1222 | |
| 1223 | #define ASSERTIF(C, X) \ |
| 1224 | do { \ |
| 1225 | if (unlikely((C) && !(X))) { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1226 | pr_err("Assertion failed\n"); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1227 | BUG(); \ |
| 1228 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1229 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1230 | |
| 1231 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1232 | do { \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1233 | __typeof__(X) _x = (X); \ |
| 1234 | __typeof__(Y) _y = (__typeof__(X))(Y); \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1235 | if (unlikely((C) && !(_x OP _y))) { \ |
| 1236 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1237 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
| 1238 | (unsigned long)_y, (unsigned long)_y); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1239 | BUG(); \ |
| 1240 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1241 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1242 | |
| 1243 | #else |
| 1244 | |
| 1245 | #define ASSERT(X) \ |
| 1246 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1247 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1248 | |
| 1249 | #define ASSERTCMP(X, OP, Y) \ |
| 1250 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1251 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1252 | |
| 1253 | #define ASSERTIF(C, X) \ |
| 1254 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1255 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1256 | |
| 1257 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1258 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1259 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1260 | |
| 1261 | #endif /* __KDEBUGALL */ |