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 | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 14 | #include <net/sock.h> |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 15 | #include <net/af_rxrpc.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 16 | #include <rxrpc/packet.h> |
| 17 | |
| 18 | #if 0 |
| 19 | #define CHECK_SLAB_OKAY(X) \ |
| 20 | BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ |
| 21 | (POISON_FREE << 8 | POISON_FREE)) |
| 22 | #else |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 23 | #define CHECK_SLAB_OKAY(X) do {} while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 24 | #endif |
| 25 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 26 | #define FCRYPT_BSIZE 8 |
| 27 | struct rxrpc_crypt { |
| 28 | union { |
| 29 | u8 x[FCRYPT_BSIZE]; |
Al Viro | 91e916c | 2008-03-29 03:08:38 +0000 | [diff] [blame] | 30 | __be32 n[2]; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 31 | }; |
| 32 | } __attribute__((aligned(8))); |
| 33 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 34 | #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
| 35 | #define rxrpc_queue_delayed_work(WS,D) \ |
| 36 | queue_delayed_work(rxrpc_workqueue, (WS), (D)) |
| 37 | |
| 38 | #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 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 */ |
| 64 | RXRPC_SERVER_LISTENING, /* server listening for connections */ |
| 65 | RXRPC_CLOSE, /* socket is being closed */ |
| 66 | }; |
| 67 | |
| 68 | /* |
| 69 | * RxRPC socket definition |
| 70 | */ |
| 71 | struct rxrpc_sock { |
| 72 | /* WARNING: sk has to be the first member */ |
| 73 | struct sock sk; |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 74 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 75 | struct rxrpc_local *local; /* local endpoint */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 76 | struct list_head listen_link; /* link in the local endpoint's listen list */ |
| 77 | struct list_head secureq; /* calls awaiting connection security clearance */ |
| 78 | struct list_head acceptq; /* calls awaiting acceptance */ |
| 79 | struct key *key; /* security for this socket */ |
| 80 | struct key *securities; /* list of server security descriptors */ |
| 81 | struct rb_root calls; /* outstanding calls on this socket */ |
| 82 | unsigned long flags; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 83 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 84 | rwlock_t call_lock; /* lock for calls */ |
| 85 | u32 min_sec_level; /* minimum security level */ |
| 86 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 87 | bool exclusive; /* Exclusive connection for a client socket */ |
| 88 | sa_family_t family; /* Protocol family created with */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 89 | struct sockaddr_rxrpc srx; /* local address */ |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 90 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 91 | }; |
| 92 | |
| 93 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) |
| 94 | |
| 95 | /* |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 96 | * CPU-byteorder normalised Rx packet header. |
| 97 | */ |
| 98 | struct rxrpc_host_header { |
| 99 | u32 epoch; /* client boot timestamp */ |
| 100 | u32 cid; /* connection and channel ID */ |
| 101 | u32 callNumber; /* call ID (0 for connection-level packets) */ |
| 102 | u32 seq; /* sequence number of pkt in call stream */ |
| 103 | u32 serial; /* serial number of pkt sent to network */ |
| 104 | u8 type; /* packet type */ |
| 105 | u8 flags; /* packet flags */ |
| 106 | u8 userStatus; /* app-layer defined status */ |
| 107 | u8 securityIndex; /* security protocol ID */ |
| 108 | union { |
| 109 | u16 _rsvd; /* reserved */ |
| 110 | u16 cksum; /* kerberos security checksum */ |
| 111 | }; |
| 112 | u16 serviceId; /* service ID */ |
| 113 | } __packed; |
| 114 | |
| 115 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 116 | * RxRPC socket buffer private variables |
| 117 | * - max 48 bytes (struct sk_buff::cb) |
| 118 | */ |
| 119 | struct rxrpc_skb_priv { |
| 120 | struct rxrpc_call *call; /* call with which associated */ |
| 121 | unsigned long resend_at; /* time in jiffies at which to resend */ |
| 122 | union { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 123 | unsigned int offset; /* offset into buffer of next read */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 124 | int remain; /* amount of space remaining for next write */ |
| 125 | u32 error; /* network error code */ |
| 126 | bool need_resend; /* T if needs resending */ |
| 127 | }; |
| 128 | |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 129 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 130 | }; |
| 131 | |
| 132 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) |
| 133 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 134 | /* |
| 135 | * RxRPC security module interface |
| 136 | */ |
| 137 | struct rxrpc_security { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 138 | const char *name; /* name of this service */ |
| 139 | u8 security_index; /* security type provided */ |
| 140 | |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 141 | /* Initialise a security service */ |
| 142 | int (*init)(void); |
| 143 | |
| 144 | /* Clean up a security service */ |
| 145 | void (*exit)(void); |
| 146 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 147 | /* initialise a connection's security */ |
| 148 | int (*init_connection_security)(struct rxrpc_connection *); |
| 149 | |
| 150 | /* prime a connection's packet security */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 151 | int (*prime_packet_security)(struct rxrpc_connection *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 152 | |
| 153 | /* impose security on a packet */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 154 | int (*secure_packet)(struct rxrpc_call *, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 155 | struct sk_buff *, |
| 156 | size_t, |
| 157 | void *); |
| 158 | |
| 159 | /* verify the security on a received packet */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 160 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 161 | |
| 162 | /* issue a challenge */ |
| 163 | int (*issue_challenge)(struct rxrpc_connection *); |
| 164 | |
| 165 | /* respond to a challenge */ |
| 166 | int (*respond_to_challenge)(struct rxrpc_connection *, |
| 167 | struct sk_buff *, |
| 168 | u32 *); |
| 169 | |
| 170 | /* verify a response */ |
| 171 | int (*verify_response)(struct rxrpc_connection *, |
| 172 | struct sk_buff *, |
| 173 | u32 *); |
| 174 | |
| 175 | /* clear connection security */ |
| 176 | void (*clear)(struct rxrpc_connection *); |
| 177 | }; |
| 178 | |
| 179 | /* |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 180 | * RxRPC local transport endpoint description |
| 181 | * - owned by a single AF_RXRPC socket |
| 182 | * - pointed to by transport socket struct sk_user_data |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 183 | */ |
| 184 | struct rxrpc_local { |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 185 | struct rcu_head rcu; |
| 186 | atomic_t usage; |
| 187 | struct list_head link; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 188 | struct socket *socket; /* my UDP socket */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 189 | struct work_struct processor; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 190 | struct list_head services; /* services listening on this endpoint */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 191 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
| 192 | struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ |
| 193 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
David Howells | 44ba069 | 2015-04-01 16:31:26 +0100 | [diff] [blame] | 194 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 195 | struct rb_root client_conns; /* Client connections by socket params */ |
| 196 | spinlock_t client_conns_lock; /* Lock for client_conns */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 197 | spinlock_t lock; /* access lock */ |
| 198 | rwlock_t services_lock; /* lock for services list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 199 | int debug_id; /* debug ID for printks */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 200 | bool dead; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 201 | struct sockaddr_rxrpc srx; /* local address */ |
| 202 | }; |
| 203 | |
| 204 | /* |
| 205 | * RxRPC remote transport endpoint definition |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 206 | * - matched by local endpoint, remote port, address and protocol type |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 207 | */ |
| 208 | struct rxrpc_peer { |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 209 | struct rcu_head rcu; /* This must be first */ |
| 210 | atomic_t usage; |
| 211 | unsigned long hash_key; |
| 212 | struct hlist_node hash_link; |
| 213 | struct rxrpc_local *local; |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 214 | struct hlist_head error_targets; /* targets for net error distribution */ |
| 215 | struct work_struct error_distributor; |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 216 | struct rb_root service_conns; /* Service connections */ |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 217 | seqlock_t service_conn_lock; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 218 | spinlock_t lock; /* access lock */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 219 | unsigned int if_mtu; /* interface MTU for this peer */ |
| 220 | unsigned int mtu; /* network MTU for this peer */ |
| 221 | unsigned int maxdata; /* data size (MTU - hdrsize) */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 222 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
| 223 | int debug_id; /* debug ID for printks */ |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 224 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
| 225 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 226 | struct sockaddr_rxrpc srx; /* remote address */ |
| 227 | |
| 228 | /* calculated RTT cache */ |
| 229 | #define RXRPC_RTT_CACHE_SIZE 32 |
| 230 | suseconds_t rtt; /* current RTT estimate (in uS) */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 231 | unsigned int rtt_point; /* next entry at which to insert */ |
| 232 | unsigned int rtt_usage; /* amount of cache actually used */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 233 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
| 234 | }; |
| 235 | |
| 236 | /* |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 237 | * Keys for matching a connection. |
| 238 | */ |
| 239 | struct rxrpc_conn_proto { |
David Howells | e8d70ce | 2016-06-30 12:16:21 +0100 | [diff] [blame] | 240 | union { |
| 241 | struct { |
| 242 | u32 epoch; /* epoch of this connection */ |
| 243 | u32 cid; /* connection ID */ |
| 244 | }; |
| 245 | u64 index_key; |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 246 | }; |
| 247 | }; |
| 248 | |
| 249 | struct rxrpc_conn_parameters { |
| 250 | struct rxrpc_local *local; /* Representation of local endpoint */ |
| 251 | struct rxrpc_peer *peer; /* Remote endpoint */ |
| 252 | struct key *key; /* Security details */ |
| 253 | bool exclusive; /* T if conn is exclusive */ |
| 254 | u16 service_id; /* Service ID for this connection */ |
| 255 | u32 security_level; /* Security level selected */ |
| 256 | }; |
| 257 | |
| 258 | /* |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 259 | * Bits in the connection flags. |
| 260 | */ |
| 261 | enum rxrpc_conn_flag { |
| 262 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ |
David Howells | 001c112 | 2016-06-30 10:45:22 +0100 | [diff] [blame] | 263 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
| 264 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 265 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
| 266 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ |
| 267 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 268 | }; |
| 269 | |
| 270 | /* |
| 271 | * Events that can be raised upon a connection. |
| 272 | */ |
| 273 | enum rxrpc_conn_event { |
| 274 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ |
| 275 | }; |
| 276 | |
| 277 | /* |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 278 | * The connection cache state. |
| 279 | */ |
| 280 | enum rxrpc_conn_cache_state { |
| 281 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ |
| 282 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ |
| 283 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ |
| 284 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ |
| 285 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ |
| 286 | }; |
| 287 | |
| 288 | /* |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 289 | * The connection protocol state. |
| 290 | */ |
| 291 | enum rxrpc_conn_proto_state { |
| 292 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ |
| 293 | RXRPC_CONN_CLIENT, /* Client connection */ |
| 294 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
| 295 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ |
| 296 | RXRPC_CONN_SERVICE, /* Service secured connection */ |
| 297 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ |
| 298 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 299 | RXRPC_CONN__NR_STATES |
| 300 | }; |
| 301 | |
| 302 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 303 | * RxRPC connection definition |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 304 | * - matched by { local, peer, epoch, conn_id, direction } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 305 | * - each connection can only handle four simultaneous calls |
| 306 | */ |
| 307 | struct rxrpc_connection { |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 308 | struct rxrpc_conn_proto proto; |
| 309 | struct rxrpc_conn_parameters params; |
| 310 | |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 311 | atomic_t usage; |
| 312 | struct rcu_head rcu; |
| 313 | struct list_head cache_link; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 314 | |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 315 | spinlock_t channel_lock; |
| 316 | unsigned char active_chans; /* Mask of active channels */ |
| 317 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) |
| 318 | struct list_head waiting_calls; /* Calls waiting for channels */ |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 319 | struct rxrpc_channel { |
| 320 | struct rxrpc_call __rcu *call; /* Active call */ |
| 321 | u32 call_id; /* ID of current call */ |
| 322 | u32 call_counter; /* Call ID counter */ |
| 323 | u32 last_call; /* ID of last call */ |
David Howells | 18bfeba | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 324 | u8 last_type; /* Type of last packet */ |
| 325 | u16 last_service_id; |
| 326 | union { |
| 327 | u32 last_seq; |
| 328 | u32 last_abort; |
| 329 | }; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 330 | } channels[RXRPC_MAXCALLS]; |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 331 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 332 | struct work_struct processor; /* connection event processor */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 333 | union { |
| 334 | struct rb_node client_node; /* Node in local->client_conns */ |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 335 | struct rb_node service_node; /* Node in peer->service_conns */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 336 | }; |
David Howells | 4d028b2 | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 337 | struct list_head proc_link; /* link in procfs list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 338 | struct list_head link; /* link in master connection list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 339 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 340 | const struct rxrpc_security *security; /* applied security module */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 341 | struct key *server_key; /* security for this service */ |
Herbert Xu | 1afe593 | 2016-01-24 21:19:01 +0800 | [diff] [blame] | 342 | struct crypto_skcipher *cipher; /* encryption handle */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 343 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 344 | unsigned long flags; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 345 | unsigned long events; |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 346 | unsigned long idle_timestamp; /* Time at which last became idle */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 347 | spinlock_t state_lock; /* state-change lock */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 348 | enum rxrpc_conn_cache_state cache_state : 8; |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 349 | enum rxrpc_conn_proto_state state : 8; /* current state of connection */ |
David Howells | dc44b3a | 2016-04-07 17:23:30 +0100 | [diff] [blame] | 350 | u32 local_abort; /* local abort code */ |
| 351 | u32 remote_abort; /* remote abort code */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 352 | int debug_id; /* debug ID for printks */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 353 | atomic_t serial; /* packet serial number counter */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 354 | unsigned int hi_serial; /* highest serial number received */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 355 | u8 size_align; /* data size alignment (for security) */ |
| 356 | u8 header_size; /* rxrpc + security header size */ |
| 357 | u8 security_size; /* security header size */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 358 | u32 security_nonce; /* response re-use preventer */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 359 | u8 security_ix; /* security type */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 360 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
| 361 | }; |
| 362 | |
| 363 | /* |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 364 | * Flags in call->flags. |
| 365 | */ |
| 366 | enum rxrpc_call_flag { |
| 367 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ |
| 368 | RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ |
| 369 | RXRPC_CALL_RCVD_LAST, /* all packets received */ |
| 370 | RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ |
| 371 | RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 372 | RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ |
| 373 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
| 374 | RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 375 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 376 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 377 | RXRPC_CALL_RX_NO_MORE, /* Don't indicate MSG_MORE from recvmsg() */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 378 | }; |
| 379 | |
| 380 | /* |
| 381 | * Events that can be raised on a call. |
| 382 | */ |
| 383 | enum rxrpc_call_event { |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 384 | RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ |
| 385 | RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ |
| 386 | RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ |
| 387 | RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ |
| 388 | RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ |
| 389 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ |
| 390 | RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ |
| 391 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ |
| 392 | RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ |
| 393 | RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ |
| 394 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ |
| 395 | RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ |
| 396 | RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ |
| 397 | RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ |
| 398 | RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ |
| 399 | RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ |
| 400 | RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 401 | }; |
| 402 | |
| 403 | /* |
| 404 | * The states that a call can be in. |
| 405 | */ |
| 406 | enum rxrpc_call_state { |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 407 | RXRPC_CALL_UNINITIALISED, |
| 408 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 409 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
| 410 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ |
| 411 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ |
| 412 | RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ |
| 413 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
| 414 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ |
| 415 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ |
| 416 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ |
| 417 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ |
| 418 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 419 | RXRPC_CALL_COMPLETE, /* - call complete */ |
| 420 | RXRPC_CALL_DEAD, /* - call is dead */ |
| 421 | NR__RXRPC_CALL_STATES |
| 422 | }; |
| 423 | |
| 424 | /* |
| 425 | * Call completion condition (state == RXRPC_CALL_COMPLETE). |
| 426 | */ |
| 427 | enum rxrpc_call_completion { |
| 428 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 429 | RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ |
| 430 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ |
| 431 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 432 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 433 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 434 | NR__RXRPC_CALL_COMPLETIONS |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 435 | }; |
| 436 | |
| 437 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 438 | * RxRPC call definition |
| 439 | * - matched by { connection, call_id } |
| 440 | */ |
| 441 | struct rxrpc_call { |
David Howells | dee4636 | 2016-06-27 17:11:19 +0100 | [diff] [blame] | 442 | struct rcu_head rcu; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 443 | struct rxrpc_connection *conn; /* connection carrying call */ |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 444 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 445 | struct rxrpc_sock *socket; /* socket responsible */ |
| 446 | struct timer_list lifetimer; /* lifetime remaining on call */ |
| 447 | struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ |
| 448 | struct timer_list ack_timer; /* ACK generation timer */ |
| 449 | struct timer_list resend_timer; /* Tx resend timer */ |
| 450 | struct work_struct destroyer; /* call destroyer */ |
| 451 | struct work_struct processor; /* packet processor and ACK generator */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 452 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 453 | struct list_head link; /* link in master call list */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 454 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 455 | struct hlist_node error_link; /* link in error distribution list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 456 | struct list_head accept_link; /* calls awaiting acceptance */ |
| 457 | struct rb_node sock_node; /* node in socket call tree */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 458 | struct sk_buff_head rx_queue; /* received packets */ |
| 459 | struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 460 | struct sk_buff_head knlrecv_queue; /* Queue for kernel_recv [TODO: replace this] */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 461 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 462 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 463 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 464 | unsigned long user_call_ID; /* user-defined call ID */ |
| 465 | unsigned long creation_jif; /* time of call creation */ |
| 466 | unsigned long flags; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 467 | unsigned long events; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 468 | spinlock_t lock; |
| 469 | rwlock_t state_lock; /* lock for state transition */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 470 | u32 abort_code; /* Local/remote abort code */ |
| 471 | int error; /* Local error incurred */ |
| 472 | enum rxrpc_call_state state : 8; /* current state of call */ |
| 473 | enum rxrpc_call_completion completion : 8; /* Call completion condition */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 474 | atomic_t usage; |
David Howells | 372ee16 | 2016-08-03 14:11:40 +0100 | [diff] [blame] | 475 | atomic_t skb_count; /* Outstanding packets on this call */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 476 | atomic_t sequence; /* Tx data packet sequence counter */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 477 | u16 service_id; /* service ID */ |
David Howells | 278ac0c | 2016-09-07 15:19:25 +0100 | [diff] [blame^] | 478 | u8 security_ix; /* Security type */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 479 | u32 call_id; /* call ID on connection */ |
| 480 | u32 cid; /* connection ID plus channel index */ |
| 481 | int debug_id; /* debug ID for printks */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 482 | |
| 483 | /* transmission-phase ACK management */ |
David Howells | 4e36a95 | 2009-09-16 00:01:13 -0700 | [diff] [blame] | 484 | u8 acks_head; /* offset into window of first entry */ |
| 485 | u8 acks_tail; /* offset into window of last entry */ |
| 486 | u8 acks_winsz; /* size of un-ACK'd window */ |
| 487 | u8 acks_unacked; /* lowest unacked packet in last ACK received */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 488 | int acks_latest; /* serial number of latest ACK received */ |
| 489 | rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ |
| 490 | unsigned long *acks_window; /* sent packet window |
| 491 | * - elements are pointers with LSB set if ACK'd |
| 492 | */ |
| 493 | |
| 494 | /* receive-phase ACK management */ |
| 495 | rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ |
| 496 | rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ |
| 497 | rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ |
| 498 | rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ |
| 499 | rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ |
| 500 | rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 501 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
David Howells | 4e36a95 | 2009-09-16 00:01:13 -0700 | [diff] [blame] | 502 | u8 ackr_reason; /* reason to ACK */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 503 | u16 ackr_skew; /* skew on packet being ACK'd */ |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 504 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 505 | atomic_t ackr_not_idle; /* number of packets in Rx queue */ |
| 506 | |
| 507 | /* received packet records, 1 bit per record */ |
| 508 | #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) |
| 509 | unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 510 | }; |
| 511 | |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 512 | enum rxrpc_call_trace { |
| 513 | rxrpc_call_new_client, |
| 514 | rxrpc_call_new_service, |
| 515 | rxrpc_call_queued, |
| 516 | rxrpc_call_queued_ref, |
| 517 | rxrpc_call_seen, |
| 518 | rxrpc_call_got, |
| 519 | rxrpc_call_got_skb, |
| 520 | rxrpc_call_got_userid, |
| 521 | rxrpc_call_put, |
| 522 | rxrpc_call_put_skb, |
| 523 | rxrpc_call_put_userid, |
| 524 | rxrpc_call_put_noqueue, |
| 525 | rxrpc_call__nr_trace |
| 526 | }; |
| 527 | |
| 528 | extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; |
| 529 | |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 530 | #include <trace/events/rxrpc.h> |
| 531 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 532 | /* |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 533 | * af_rxrpc.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 534 | */ |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 535 | extern atomic_t rxrpc_n_skbs; |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 536 | extern u32 rxrpc_epoch; |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 537 | extern atomic_t rxrpc_debug_id; |
| 538 | extern struct workqueue_struct *rxrpc_workqueue; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 539 | |
| 540 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 541 | * call_accept.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 542 | */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 543 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 544 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
| 545 | rxrpc_notify_rx_t); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 546 | int rxrpc_reject_call(struct rxrpc_sock *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 547 | |
| 548 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 549 | * call_event.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 550 | */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 551 | void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); |
| 552 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 553 | void rxrpc_process_call(struct work_struct *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 554 | |
| 555 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 556 | * call_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 557 | */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 558 | extern const char *const rxrpc_call_states[]; |
| 559 | extern const char *const rxrpc_call_completions[]; |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 560 | extern unsigned int rxrpc_max_call_lifetime; |
| 561 | extern unsigned int rxrpc_dead_call_expiry; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 562 | extern struct kmem_cache *rxrpc_call_jar; |
| 563 | extern struct list_head rxrpc_calls; |
| 564 | extern rwlock_t rxrpc_call_lock; |
| 565 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 566 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
| 567 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 568 | struct rxrpc_conn_parameters *, |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 569 | struct sockaddr_rxrpc *, |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 570 | unsigned long, gfp_t); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 571 | struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
| 572 | struct rxrpc_connection *, |
David Howells | 42886ff | 2016-06-16 13:31:07 +0100 | [diff] [blame] | 573 | struct sk_buff *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 574 | void rxrpc_release_call(struct rxrpc_call *); |
| 575 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 576 | void rxrpc_see_call(struct rxrpc_call *); |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 577 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
| 578 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 579 | void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *); |
| 580 | void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 581 | void __exit rxrpc_destroy_all_calls(void); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 582 | |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 583 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
| 584 | { |
| 585 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); |
| 586 | } |
| 587 | |
| 588 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) |
| 589 | { |
| 590 | return !rxrpc_is_service_call(call); |
| 591 | } |
| 592 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 593 | /* |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 594 | * Transition a call to the complete state. |
| 595 | */ |
| 596 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, |
| 597 | enum rxrpc_call_completion compl, |
| 598 | u32 abort_code, |
| 599 | int error) |
| 600 | { |
| 601 | if (call->state < RXRPC_CALL_COMPLETE) { |
| 602 | call->abort_code = abort_code; |
| 603 | call->error = error; |
| 604 | call->completion = compl, |
| 605 | call->state = RXRPC_CALL_COMPLETE; |
| 606 | return true; |
| 607 | } |
| 608 | return false; |
| 609 | } |
| 610 | |
| 611 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, |
| 612 | enum rxrpc_call_completion compl, |
| 613 | u32 abort_code, |
| 614 | int error) |
| 615 | { |
| 616 | int ret; |
| 617 | |
| 618 | write_lock_bh(&call->state_lock); |
| 619 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); |
| 620 | write_unlock_bh(&call->state_lock); |
| 621 | return ret; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Record that a call successfully completed. |
| 626 | */ |
| 627 | static inline void __rxrpc_call_completed(struct rxrpc_call *call) |
| 628 | { |
| 629 | __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
| 630 | } |
| 631 | |
| 632 | static inline void rxrpc_call_completed(struct rxrpc_call *call) |
| 633 | { |
| 634 | write_lock_bh(&call->state_lock); |
| 635 | __rxrpc_call_completed(call); |
| 636 | write_unlock_bh(&call->state_lock); |
| 637 | } |
| 638 | |
| 639 | /* |
| 640 | * Record that a call is locally aborted. |
| 641 | */ |
| 642 | static inline bool __rxrpc_abort_call(struct rxrpc_call *call, |
| 643 | u32 abort_code, int error) |
| 644 | { |
| 645 | if (__rxrpc_set_call_completion(call, |
| 646 | RXRPC_CALL_LOCALLY_ABORTED, |
| 647 | abort_code, error)) { |
| 648 | set_bit(RXRPC_CALL_EV_ABORT, &call->events); |
| 649 | return true; |
| 650 | } |
| 651 | return false; |
| 652 | } |
| 653 | |
| 654 | static inline bool rxrpc_abort_call(struct rxrpc_call *call, |
| 655 | u32 abort_code, int error) |
| 656 | { |
| 657 | bool ret; |
| 658 | |
| 659 | write_lock_bh(&call->state_lock); |
| 660 | ret = __rxrpc_abort_call(call, abort_code, error); |
| 661 | write_unlock_bh(&call->state_lock); |
| 662 | return ret; |
| 663 | } |
| 664 | |
| 665 | /* |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 666 | * conn_client.c |
| 667 | */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 668 | extern unsigned int rxrpc_max_client_connections; |
| 669 | extern unsigned int rxrpc_reap_client_connections; |
| 670 | extern unsigned int rxrpc_conn_idle_client_expiry; |
| 671 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 672 | extern struct idr rxrpc_client_conn_ids; |
| 673 | |
David Howells | eb9b9d2 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 674 | void rxrpc_destroy_client_conn_ids(void); |
David Howells | c6d2b8d | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 675 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
| 676 | struct sockaddr_rxrpc *, gfp_t); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 677 | void rxrpc_expose_client_call(struct rxrpc_call *); |
| 678 | void rxrpc_disconnect_client_call(struct rxrpc_call *); |
| 679 | void rxrpc_put_client_conn(struct rxrpc_connection *); |
| 680 | void __exit rxrpc_destroy_all_client_connections(void); |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 681 | |
| 682 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 683 | * conn_event.c |
| 684 | */ |
| 685 | void rxrpc_process_connection(struct work_struct *); |
| 686 | void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 687 | void rxrpc_reject_packets(struct rxrpc_local *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 688 | |
| 689 | /* |
| 690 | * conn_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 691 | */ |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 692 | extern unsigned int rxrpc_connection_expiry; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 693 | extern struct list_head rxrpc_connections; |
David Howells | 4d028b2 | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 694 | extern struct list_head rxrpc_connection_proc_list; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 695 | extern rwlock_t rxrpc_connection_lock; |
| 696 | |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 697 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
David Howells | c6d2b8d | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 698 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 699 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
| 700 | struct sk_buff *); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 701 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 702 | void rxrpc_disconnect_call(struct rxrpc_call *); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 703 | void rxrpc_kill_connection(struct rxrpc_connection *); |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 704 | void __rxrpc_put_connection(struct rxrpc_connection *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 705 | void __exit rxrpc_destroy_all_connections(void); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 706 | |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 707 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
| 708 | { |
| 709 | return conn->out_clientflag; |
| 710 | } |
| 711 | |
| 712 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) |
| 713 | { |
David Howells | e8d70ce | 2016-06-30 12:16:21 +0100 | [diff] [blame] | 714 | return !rxrpc_conn_is_client(conn); |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 715 | } |
| 716 | |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 717 | static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
| 718 | { |
| 719 | atomic_inc(&conn->usage); |
| 720 | } |
| 721 | |
David Howells | 2c4579e | 2016-06-27 10:32:03 +0100 | [diff] [blame] | 722 | static inline |
| 723 | struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) |
| 724 | { |
| 725 | return atomic_inc_not_zero(&conn->usage) ? conn : NULL; |
| 726 | } |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 727 | |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 728 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
| 729 | { |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 730 | if (!conn) |
| 731 | return; |
| 732 | |
| 733 | if (rxrpc_conn_is_client(conn)) { |
| 734 | if (atomic_dec_and_test(&conn->usage)) |
| 735 | rxrpc_put_client_conn(conn); |
| 736 | } else { |
| 737 | if (atomic_dec_return(&conn->usage) == 1) |
| 738 | __rxrpc_put_connection(conn); |
| 739 | } |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 740 | } |
| 741 | |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 742 | static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 743 | { |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 744 | if (!rxrpc_get_connection_maybe(conn)) |
| 745 | return false; |
| 746 | if (!rxrpc_queue_work(&conn->processor)) |
David Howells | 2c4579e | 2016-06-27 10:32:03 +0100 | [diff] [blame] | 747 | rxrpc_put_connection(conn); |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 748 | return true; |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 749 | } |
| 750 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 751 | /* |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 752 | * conn_service.c |
| 753 | */ |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 754 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
| 755 | struct sk_buff *); |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 756 | struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, |
David Howells | d991b4a | 2016-06-29 14:40:39 +0100 | [diff] [blame] | 757 | struct sockaddr_rxrpc *, |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 758 | struct sk_buff *); |
David Howells | 001c112 | 2016-06-30 10:45:22 +0100 | [diff] [blame] | 759 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 760 | |
| 761 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 762 | * input.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 763 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 764 | void rxrpc_data_ready(struct sock *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 765 | int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); |
| 766 | void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 767 | |
| 768 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 769 | * insecure.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 770 | */ |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 771 | extern const struct rxrpc_security rxrpc_no_security; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 772 | |
| 773 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 774 | * key.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 775 | */ |
| 776 | extern struct key_type key_type_rxrpc; |
| 777 | extern struct key_type key_type_rxrpc_s; |
| 778 | |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 779 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
| 780 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); |
| 781 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, |
| 782 | u32); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 783 | |
| 784 | /* |
David Howells | 8756361 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 785 | * local_event.c |
| 786 | */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 787 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
David Howells | 8756361 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 788 | |
| 789 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 790 | * local_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 791 | */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 792 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
| 793 | void __rxrpc_put_local(struct rxrpc_local *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 794 | void __exit rxrpc_destroy_all_locals(void); |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 795 | |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 796 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
| 797 | { |
| 798 | atomic_inc(&local->usage); |
| 799 | } |
| 800 | |
| 801 | static inline |
| 802 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) |
| 803 | { |
| 804 | return atomic_inc_not_zero(&local->usage) ? local : NULL; |
| 805 | } |
| 806 | |
| 807 | static inline void rxrpc_put_local(struct rxrpc_local *local) |
| 808 | { |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 809 | if (local && atomic_dec_and_test(&local->usage)) |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 810 | __rxrpc_put_local(local); |
| 811 | } |
| 812 | |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 813 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
| 814 | { |
| 815 | rxrpc_queue_work(&local->processor); |
| 816 | } |
| 817 | |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 818 | /* |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 819 | * misc.c |
| 820 | */ |
David Howells | 0e119b4 | 2016-06-10 22:30:37 +0100 | [diff] [blame] | 821 | extern unsigned int rxrpc_max_backlog __read_mostly; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 822 | extern unsigned int rxrpc_requested_ack_delay; |
| 823 | extern unsigned int rxrpc_soft_ack_delay; |
| 824 | extern unsigned int rxrpc_idle_ack_delay; |
| 825 | extern unsigned int rxrpc_rx_window_size; |
| 826 | extern unsigned int rxrpc_rx_mtu; |
| 827 | extern unsigned int rxrpc_rx_jumbo_max; |
David Howells | 0b58b8a | 2016-09-02 22:39:45 +0100 | [diff] [blame] | 828 | extern unsigned int rxrpc_resend_timeout; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 829 | |
David Howells | 5b3e87f | 2016-04-07 17:23:23 +0100 | [diff] [blame] | 830 | extern const char *const rxrpc_pkts[]; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 831 | extern const s8 rxrpc_ack_priority[]; |
| 832 | |
| 833 | extern const char *rxrpc_acks(u8 reason); |
| 834 | |
| 835 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 836 | * output.c |
| 837 | */ |
David Howells | 985a5c8 | 2016-06-17 11:53:37 +0100 | [diff] [blame] | 838 | int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 839 | |
| 840 | /* |
David Howells | abe89ef | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 841 | * peer_event.c |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 842 | */ |
David Howells | abe89ef | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 843 | void rxrpc_error_report(struct sock *); |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 844 | void rxrpc_peer_error_distributor(struct work_struct *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 845 | |
| 846 | /* |
| 847 | * peer_object.c |
| 848 | */ |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 849 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
| 850 | const struct sockaddr_rxrpc *); |
| 851 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, |
| 852 | struct sockaddr_rxrpc *, gfp_t); |
| 853 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); |
| 854 | |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 855 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 856 | { |
| 857 | atomic_inc(&peer->usage); |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 858 | return peer; |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | static inline |
| 862 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) |
| 863 | { |
| 864 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; |
| 865 | } |
| 866 | |
| 867 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); |
| 868 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) |
| 869 | { |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 870 | if (peer && atomic_dec_and_test(&peer->usage)) |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 871 | __rxrpc_put_peer(peer); |
| 872 | } |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 873 | |
| 874 | /* |
| 875 | * proc.c |
| 876 | */ |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 877 | extern const struct file_operations rxrpc_call_seq_fops; |
| 878 | extern const struct file_operations rxrpc_connection_seq_fops; |
| 879 | |
| 880 | /* |
| 881 | * recvmsg.c |
| 882 | */ |
| 883 | void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
| 884 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
| 885 | |
| 886 | /* |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 887 | * rxkad.c |
| 888 | */ |
| 889 | #ifdef CONFIG_RXKAD |
| 890 | extern const struct rxrpc_security rxkad; |
| 891 | #endif |
| 892 | |
| 893 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 894 | * security.c |
| 895 | */ |
| 896 | int __init rxrpc_init_security(void); |
| 897 | void rxrpc_exit_security(void); |
| 898 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
| 899 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); |
David Howells | 71a17de | 2016-09-07 14:43:39 +0100 | [diff] [blame] | 900 | |
David Howells | 0b58b8a | 2016-09-02 22:39:45 +0100 | [diff] [blame] | 901 | /* |
| 902 | * sendmsg.c |
| 903 | */ |
| 904 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 905 | |
| 906 | /* |
| 907 | * skbuff.c |
| 908 | */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 909 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 910 | void rxrpc_packet_destructor(struct sk_buff *); |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 911 | void rxrpc_new_skb(struct sk_buff *); |
| 912 | void rxrpc_see_skb(struct sk_buff *); |
| 913 | void rxrpc_get_skb(struct sk_buff *); |
| 914 | void rxrpc_free_skb(struct sk_buff *); |
| 915 | void rxrpc_purge_queue(struct sk_buff_head *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 916 | |
| 917 | /* |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 918 | * sysctl.c |
| 919 | */ |
| 920 | #ifdef CONFIG_SYSCTL |
| 921 | extern int __init rxrpc_sysctl_init(void); |
| 922 | extern void rxrpc_sysctl_exit(void); |
| 923 | #else |
| 924 | static inline int __init rxrpc_sysctl_init(void) { return 0; } |
| 925 | static inline void rxrpc_sysctl_exit(void) {} |
| 926 | #endif |
| 927 | |
| 928 | /* |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 929 | * utils.c |
| 930 | */ |
David Howells | d991b4a | 2016-06-29 14:40:39 +0100 | [diff] [blame] | 931 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 932 | |
| 933 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 934 | * debug tracing |
| 935 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 936 | extern unsigned int rxrpc_debug; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 937 | |
| 938 | #define dbgprintk(FMT,...) \ |
Sven Schnelle | 9f389f4 | 2008-04-03 10:45:30 +0100 | [diff] [blame] | 939 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 940 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 941 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 942 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 943 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 944 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) |
| 945 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) |
| 946 | |
| 947 | |
| 948 | #if defined(__KDEBUG) |
| 949 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 950 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 951 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 952 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) |
| 953 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) |
| 954 | |
| 955 | #elif defined(CONFIG_AF_RXRPC_DEBUG) |
| 956 | #define RXRPC_DEBUG_KENTER 0x01 |
| 957 | #define RXRPC_DEBUG_KLEAVE 0x02 |
| 958 | #define RXRPC_DEBUG_KDEBUG 0x04 |
| 959 | #define RXRPC_DEBUG_KPROTO 0x08 |
| 960 | #define RXRPC_DEBUG_KNET 0x10 |
| 961 | |
| 962 | #define _enter(FMT,...) \ |
| 963 | do { \ |
| 964 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ |
| 965 | kenter(FMT,##__VA_ARGS__); \ |
| 966 | } while (0) |
| 967 | |
| 968 | #define _leave(FMT,...) \ |
| 969 | do { \ |
| 970 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ |
| 971 | kleave(FMT,##__VA_ARGS__); \ |
| 972 | } while (0) |
| 973 | |
| 974 | #define _debug(FMT,...) \ |
| 975 | do { \ |
| 976 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ |
| 977 | kdebug(FMT,##__VA_ARGS__); \ |
| 978 | } while (0) |
| 979 | |
| 980 | #define _proto(FMT,...) \ |
| 981 | do { \ |
| 982 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ |
| 983 | kproto(FMT,##__VA_ARGS__); \ |
| 984 | } while (0) |
| 985 | |
| 986 | #define _net(FMT,...) \ |
| 987 | do { \ |
| 988 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ |
| 989 | knet(FMT,##__VA_ARGS__); \ |
| 990 | } while (0) |
| 991 | |
| 992 | #else |
David Howells | 12fdff3 | 2010-08-12 16:54:57 +0100 | [diff] [blame] | 993 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 994 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 995 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| 996 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) |
| 997 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 998 | #endif |
| 999 | |
| 1000 | /* |
| 1001 | * debug assertion checking |
| 1002 | */ |
| 1003 | #if 1 // defined(__KDEBUGALL) |
| 1004 | |
| 1005 | #define ASSERT(X) \ |
| 1006 | do { \ |
| 1007 | if (unlikely(!(X))) { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1008 | pr_err("Assertion failed\n"); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1009 | BUG(); \ |
| 1010 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1011 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1012 | |
| 1013 | #define ASSERTCMP(X, OP, Y) \ |
| 1014 | do { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1015 | unsigned long _x = (unsigned long)(X); \ |
| 1016 | unsigned long _y = (unsigned long)(Y); \ |
| 1017 | if (unlikely(!(_x OP _y))) { \ |
| 1018 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
| 1019 | _x, _x, #OP, _y, _y); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1020 | BUG(); \ |
| 1021 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1022 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1023 | |
| 1024 | #define ASSERTIF(C, X) \ |
| 1025 | do { \ |
| 1026 | if (unlikely((C) && !(X))) { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1027 | pr_err("Assertion failed\n"); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1028 | BUG(); \ |
| 1029 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1030 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1031 | |
| 1032 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1033 | do { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1034 | unsigned long _x = (unsigned long)(X); \ |
| 1035 | unsigned long _y = (unsigned long)(Y); \ |
| 1036 | if (unlikely((C) && !(_x OP _y))) { \ |
| 1037 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
| 1038 | _x, _x, #OP, _y, _y); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1039 | BUG(); \ |
| 1040 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1041 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1042 | |
| 1043 | #else |
| 1044 | |
| 1045 | #define ASSERT(X) \ |
| 1046 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1047 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1048 | |
| 1049 | #define ASSERTCMP(X, OP, Y) \ |
| 1050 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1051 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1052 | |
| 1053 | #define ASSERTIF(C, X) \ |
| 1054 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1055 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1056 | |
| 1057 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1058 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1059 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1060 | |
| 1061 | #endif /* __KDEBUGALL */ |