Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [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 | |
| 12 | #include <rxrpc/packet.h> |
| 13 | |
| 14 | #if 0 |
| 15 | #define CHECK_SLAB_OKAY(X) \ |
| 16 | BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ |
| 17 | (POISON_FREE << 8 | POISON_FREE)) |
| 18 | #else |
| 19 | #define CHECK_SLAB_OKAY(X) do {} while(0) |
| 20 | #endif |
| 21 | |
| 22 | #define FCRYPT_BSIZE 8 |
| 23 | struct rxrpc_crypt { |
| 24 | union { |
| 25 | u8 x[FCRYPT_BSIZE]; |
| 26 | __be32 n[2]; |
| 27 | }; |
| 28 | } __attribute__((aligned(8))); |
| 29 | |
| 30 | #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
| 31 | #define rxrpc_queue_delayed_work(WS,D) \ |
| 32 | queue_delayed_work(rxrpc_workqueue, (WS), (D)) |
| 33 | |
| 34 | #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) |
| 35 | #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor) |
| 36 | |
| 37 | /* |
| 38 | * sk_state for RxRPC sockets |
| 39 | */ |
| 40 | enum { |
| 41 | RXRPC_UNCONNECTED = 0, |
| 42 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
| 43 | RXRPC_CLIENT_CONNECTED, /* client is connected */ |
| 44 | RXRPC_SERVER_BOUND, /* server local address bound */ |
| 45 | RXRPC_SERVER_LISTENING, /* server listening for connections */ |
| 46 | RXRPC_CLOSE, /* socket is being closed */ |
| 47 | }; |
| 48 | |
| 49 | /* |
| 50 | * RxRPC socket definition |
| 51 | */ |
| 52 | struct rxrpc_sock { |
| 53 | /* WARNING: sk has to be the first member */ |
| 54 | struct sock sk; |
| 55 | rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ |
| 56 | struct rxrpc_local *local; /* local endpoint */ |
| 57 | struct rxrpc_transport *trans; /* transport handler */ |
| 58 | struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ |
| 59 | struct rxrpc_connection *conn; /* exclusive virtual connection */ |
| 60 | struct list_head listen_link; /* link in the local endpoint's listen list */ |
| 61 | struct list_head secureq; /* calls awaiting connection security clearance */ |
| 62 | struct list_head acceptq; /* calls awaiting acceptance */ |
| 63 | struct key *key; /* security for this socket */ |
| 64 | struct key *securities; /* list of server security descriptors */ |
| 65 | struct rb_root calls; /* outstanding calls on this socket */ |
| 66 | unsigned long flags; |
| 67 | #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ |
| 68 | rwlock_t call_lock; /* lock for calls */ |
| 69 | u32 min_sec_level; /* minimum security level */ |
| 70 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT |
| 71 | struct sockaddr_rxrpc srx; /* local address */ |
| 72 | sa_family_t proto; /* protocol created with */ |
| 73 | __be16 service_id; /* service ID of local/remote service */ |
| 74 | }; |
| 75 | |
| 76 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) |
| 77 | |
| 78 | /* |
| 79 | * RxRPC socket buffer private variables |
| 80 | * - max 48 bytes (struct sk_buff::cb) |
| 81 | */ |
| 82 | struct rxrpc_skb_priv { |
| 83 | struct rxrpc_call *call; /* call with which associated */ |
| 84 | unsigned long resend_at; /* time in jiffies at which to resend */ |
| 85 | union { |
| 86 | unsigned int offset; /* offset into buffer of next read */ |
| 87 | int remain; /* amount of space remaining for next write */ |
| 88 | u32 error; /* network error code */ |
| 89 | bool need_resend; /* T if needs resending */ |
| 90 | }; |
| 91 | |
| 92 | struct rxrpc_header hdr; /* RxRPC packet header from this packet */ |
| 93 | }; |
| 94 | |
| 95 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) |
| 96 | |
| 97 | enum rxrpc_command { |
| 98 | RXRPC_CMD_SEND_DATA, /* send data message */ |
| 99 | RXRPC_CMD_SEND_ABORT, /* request abort generation */ |
| 100 | RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ |
| 101 | RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ |
| 102 | }; |
| 103 | |
| 104 | /* |
| 105 | * RxRPC security module interface |
| 106 | */ |
| 107 | struct rxrpc_security { |
| 108 | struct module *owner; /* providing module */ |
| 109 | struct list_head link; /* link in master list */ |
| 110 | const char *name; /* name of this service */ |
| 111 | u8 security_index; /* security type provided */ |
| 112 | |
| 113 | /* initialise a connection's security */ |
| 114 | int (*init_connection_security)(struct rxrpc_connection *); |
| 115 | |
| 116 | /* prime a connection's packet security */ |
| 117 | void (*prime_packet_security)(struct rxrpc_connection *); |
| 118 | |
| 119 | /* impose security on a packet */ |
| 120 | int (*secure_packet)(const struct rxrpc_call *, |
| 121 | struct sk_buff *, |
| 122 | size_t, |
| 123 | void *); |
| 124 | |
| 125 | /* verify the security on a received packet */ |
| 126 | int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, |
| 127 | u32 *); |
| 128 | |
| 129 | /* issue a challenge */ |
| 130 | int (*issue_challenge)(struct rxrpc_connection *); |
| 131 | |
| 132 | /* respond to a challenge */ |
| 133 | int (*respond_to_challenge)(struct rxrpc_connection *, |
| 134 | struct sk_buff *, |
| 135 | u32 *); |
| 136 | |
| 137 | /* verify a response */ |
| 138 | int (*verify_response)(struct rxrpc_connection *, |
| 139 | struct sk_buff *, |
| 140 | u32 *); |
| 141 | |
| 142 | /* clear connection security */ |
| 143 | void (*clear)(struct rxrpc_connection *); |
| 144 | }; |
| 145 | |
| 146 | /* |
| 147 | * RxRPC local transport endpoint definition |
| 148 | * - matched by local port, address and protocol type |
| 149 | */ |
| 150 | struct rxrpc_local { |
| 151 | struct socket *socket; /* my UDP socket */ |
| 152 | struct work_struct destroyer; /* endpoint destroyer */ |
| 153 | struct work_struct acceptor; /* incoming call processor */ |
| 154 | struct work_struct rejecter; /* packet reject writer */ |
| 155 | struct work_struct event_processor; /* endpoint event processor */ |
| 156 | struct list_head services; /* services listening on this endpoint */ |
| 157 | struct list_head link; /* link in endpoint list */ |
| 158 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
| 159 | struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ |
| 160 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
| 161 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
| 162 | spinlock_t lock; /* access lock */ |
| 163 | rwlock_t services_lock; /* lock for services list */ |
| 164 | atomic_t usage; |
| 165 | int debug_id; /* debug ID for printks */ |
| 166 | volatile char error_rcvd; /* T if received ICMP error outstanding */ |
| 167 | struct sockaddr_rxrpc srx; /* local address */ |
| 168 | }; |
| 169 | |
| 170 | /* |
| 171 | * RxRPC remote transport endpoint definition |
| 172 | * - matched by remote port, address and protocol type |
| 173 | * - holds the connection ID counter for connections between the two endpoints |
| 174 | */ |
| 175 | struct rxrpc_peer { |
| 176 | struct work_struct destroyer; /* peer destroyer */ |
| 177 | struct list_head link; /* link in master peer list */ |
| 178 | struct list_head error_targets; /* targets for net error distribution */ |
| 179 | spinlock_t lock; /* access lock */ |
| 180 | atomic_t usage; |
| 181 | unsigned int if_mtu; /* interface MTU for this peer */ |
| 182 | unsigned int mtu; /* network MTU for this peer */ |
| 183 | unsigned int maxdata; /* data size (MTU - hdrsize) */ |
| 184 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
| 185 | int debug_id; /* debug ID for printks */ |
| 186 | int net_error; /* network error distributed */ |
| 187 | struct sockaddr_rxrpc srx; /* remote address */ |
| 188 | |
| 189 | /* calculated RTT cache */ |
| 190 | #define RXRPC_RTT_CACHE_SIZE 32 |
| 191 | suseconds_t rtt; /* current RTT estimate (in uS) */ |
| 192 | unsigned int rtt_point; /* next entry at which to insert */ |
| 193 | unsigned int rtt_usage; /* amount of cache actually used */ |
| 194 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
| 195 | }; |
| 196 | |
| 197 | /* |
| 198 | * RxRPC point-to-point transport / connection manager definition |
| 199 | * - handles a bundle of connections between two endpoints |
| 200 | * - matched by { local, peer } |
| 201 | */ |
| 202 | struct rxrpc_transport { |
| 203 | struct rxrpc_local *local; /* local transport endpoint */ |
| 204 | struct rxrpc_peer *peer; /* remote transport endpoint */ |
| 205 | struct work_struct error_handler; /* network error distributor */ |
| 206 | struct rb_root bundles; /* client connection bundles on this transport */ |
| 207 | struct rb_root client_conns; /* client connections on this transport */ |
| 208 | struct rb_root server_conns; /* server connections on this transport */ |
| 209 | struct list_head link; /* link in master session list */ |
| 210 | struct sk_buff_head error_queue; /* error packets awaiting processing */ |
| 211 | unsigned long put_time; /* time at which to reap */ |
| 212 | spinlock_t client_lock; /* client connection allocation lock */ |
| 213 | rwlock_t conn_lock; /* lock for active/dead connections */ |
| 214 | atomic_t usage; |
| 215 | int debug_id; /* debug ID for printks */ |
| 216 | unsigned int conn_idcounter; /* connection ID counter (client) */ |
| 217 | }; |
| 218 | |
| 219 | /* |
| 220 | * RxRPC client connection bundle |
| 221 | * - matched by { transport, service_id, key } |
| 222 | */ |
| 223 | struct rxrpc_conn_bundle { |
| 224 | struct rb_node node; /* node in transport's lookup tree */ |
| 225 | struct list_head unused_conns; /* unused connections in this bundle */ |
| 226 | struct list_head avail_conns; /* available connections in this bundle */ |
| 227 | struct list_head busy_conns; /* busy connections in this bundle */ |
| 228 | struct key *key; /* security for this bundle */ |
| 229 | wait_queue_head_t chanwait; /* wait for channel to become available */ |
| 230 | atomic_t usage; |
| 231 | int debug_id; /* debug ID for printks */ |
| 232 | unsigned short num_conns; /* number of connections in this bundle */ |
| 233 | __be16 service_id; /* service ID */ |
| 234 | u8 security_ix; /* security type */ |
| 235 | }; |
| 236 | |
| 237 | /* |
| 238 | * RxRPC connection definition |
| 239 | * - matched by { transport, service_id, conn_id, direction, key } |
| 240 | * - each connection can only handle four simultaneous calls |
| 241 | */ |
| 242 | struct rxrpc_connection { |
| 243 | struct rxrpc_transport *trans; /* transport session */ |
| 244 | struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ |
| 245 | struct work_struct processor; /* connection event processor */ |
| 246 | struct rb_node node; /* node in transport's lookup tree */ |
| 247 | struct list_head link; /* link in master connection list */ |
| 248 | struct list_head bundle_link; /* link in bundle */ |
| 249 | struct rb_root calls; /* calls on this connection */ |
| 250 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
| 251 | struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ |
| 252 | struct rxrpc_security *security; /* applied security module */ |
| 253 | struct key *key; /* security for this connection (client) */ |
| 254 | struct key *server_key; /* security for this service */ |
| 255 | struct crypto_blkcipher *cipher; /* encryption handle */ |
| 256 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
| 257 | unsigned long events; |
| 258 | #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ |
| 259 | unsigned long put_time; /* time at which to reap */ |
| 260 | rwlock_t lock; /* access lock */ |
| 261 | spinlock_t state_lock; /* state-change lock */ |
| 262 | atomic_t usage; |
| 263 | u32 real_conn_id; /* connection ID (host-endian) */ |
| 264 | enum { /* current state of connection */ |
| 265 | RXRPC_CONN_UNUSED, /* - connection not yet attempted */ |
| 266 | RXRPC_CONN_CLIENT, /* - client connection */ |
| 267 | RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ |
| 268 | RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ |
| 269 | RXRPC_CONN_SERVER, /* - server secured connection */ |
| 270 | RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ |
| 271 | RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ |
| 272 | RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ |
| 273 | } state; |
| 274 | int error; /* error code for local abort */ |
| 275 | int debug_id; /* debug ID for printks */ |
| 276 | unsigned int call_counter; /* call ID counter */ |
| 277 | atomic_t serial; /* packet serial number counter */ |
| 278 | atomic_t hi_serial; /* highest serial number received */ |
| 279 | u8 avail_calls; /* number of calls available */ |
| 280 | u8 size_align; /* data size alignment (for security) */ |
| 281 | u8 header_size; /* rxrpc + security header size */ |
| 282 | u8 security_size; /* security header size */ |
| 283 | u32 security_level; /* security level negotiated */ |
| 284 | u32 security_nonce; /* response re-use preventer */ |
| 285 | |
| 286 | /* the following are all in net order */ |
| 287 | __be32 epoch; /* epoch of this connection */ |
| 288 | __be32 cid; /* connection ID */ |
| 289 | __be16 service_id; /* service ID */ |
| 290 | u8 security_ix; /* security type */ |
| 291 | u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ |
| 292 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
| 293 | }; |
| 294 | |
| 295 | /* |
| 296 | * RxRPC call definition |
| 297 | * - matched by { connection, call_id } |
| 298 | */ |
| 299 | struct rxrpc_call { |
| 300 | struct rxrpc_connection *conn; /* connection carrying call */ |
| 301 | struct rxrpc_sock *socket; /* socket responsible */ |
| 302 | struct timer_list lifetimer; /* lifetime remaining on call */ |
| 303 | struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ |
| 304 | struct timer_list ack_timer; /* ACK generation timer */ |
| 305 | struct timer_list resend_timer; /* Tx resend timer */ |
| 306 | struct work_struct destroyer; /* call destroyer */ |
| 307 | struct work_struct processor; /* packet processor and ACK generator */ |
| 308 | struct list_head link; /* link in master call list */ |
| 309 | struct list_head error_link; /* link in error distribution list */ |
| 310 | struct list_head accept_link; /* calls awaiting acceptance */ |
| 311 | struct rb_node sock_node; /* node in socket call tree */ |
| 312 | struct rb_node conn_node; /* node in connection call tree */ |
| 313 | struct sk_buff_head rx_queue; /* received packets */ |
| 314 | struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ |
| 315 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
| 316 | wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ |
| 317 | unsigned long user_call_ID; /* user-defined call ID */ |
| 318 | unsigned long creation_jif; /* time of call creation */ |
| 319 | unsigned long flags; |
| 320 | #define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */ |
| 321 | #define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */ |
| 322 | #define RXRPC_CALL_RCVD_LAST 2 /* all packets received */ |
| 323 | #define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */ |
| 324 | #define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */ |
| 325 | #define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */ |
| 326 | #define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */ |
| 327 | #define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */ |
| 328 | #define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */ |
| 329 | unsigned long events; |
| 330 | #define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */ |
| 331 | #define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */ |
| 332 | #define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */ |
| 333 | #define RXRPC_CALL_RCVD_ERROR 3 /* network error received */ |
| 334 | #define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */ |
| 335 | #define RXRPC_CALL_ACK 5 /* need to generate ACK */ |
| 336 | #define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */ |
| 337 | #define RXRPC_CALL_ABORT 7 /* need to generate abort */ |
| 338 | #define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */ |
| 339 | #define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */ |
| 340 | #define RXRPC_CALL_RESEND 10 /* Tx resend required */ |
| 341 | #define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */ |
| 342 | #define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */ |
| 343 | #define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */ |
| 344 | #define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */ |
| 345 | #define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */ |
| 346 | #define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */ |
| 347 | |
| 348 | spinlock_t lock; |
| 349 | rwlock_t state_lock; /* lock for state transition */ |
| 350 | atomic_t usage; |
| 351 | atomic_t sequence; /* Tx data packet sequence counter */ |
| 352 | u32 abort_code; /* local/remote abort code */ |
| 353 | enum { /* current state of call */ |
| 354 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
| 355 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ |
| 356 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ |
| 357 | RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ |
| 358 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
| 359 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ |
| 360 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ |
| 361 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ |
| 362 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ |
| 363 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ |
| 364 | RXRPC_CALL_COMPLETE, /* - call completed */ |
| 365 | RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ |
| 366 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ |
| 367 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ |
| 368 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
| 369 | RXRPC_CALL_DEAD, /* - call is dead */ |
| 370 | } state; |
| 371 | int debug_id; /* debug ID for printks */ |
| 372 | u8 channel; /* connection channel occupied by this call */ |
| 373 | |
| 374 | /* transmission-phase ACK management */ |
| 375 | u8 acks_head; /* offset into window of first entry */ |
| 376 | u8 acks_tail; /* offset into window of last entry */ |
| 377 | u8 acks_winsz; /* size of un-ACK'd window */ |
| 378 | u8 acks_unacked; /* lowest unacked packet in last ACK received */ |
| 379 | int acks_latest; /* serial number of latest ACK received */ |
| 380 | rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ |
| 381 | unsigned long *acks_window; /* sent packet window |
| 382 | * - elements are pointers with LSB set if ACK'd |
| 383 | */ |
| 384 | |
| 385 | /* receive-phase ACK management */ |
| 386 | rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ |
| 387 | rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ |
| 388 | rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ |
| 389 | rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ |
| 390 | rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ |
| 391 | rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ |
| 392 | rxrpc_seq_net_t ackr_prev_seq; /* previous sequence number received */ |
| 393 | u8 ackr_reason; /* reason to ACK */ |
| 394 | __be32 ackr_serial; /* serial of packet being ACK'd */ |
| 395 | atomic_t ackr_not_idle; /* number of packets in Rx queue */ |
| 396 | |
| 397 | /* received packet records, 1 bit per record */ |
| 398 | #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) |
| 399 | unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; |
| 400 | |
| 401 | struct hlist_node hash_node; |
| 402 | unsigned long hash_key; /* Full hash key */ |
| 403 | u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ |
| 404 | struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ |
| 405 | sa_family_t proto; /* Frame protocol */ |
| 406 | /* the following should all be in net order */ |
| 407 | __be32 cid; /* connection ID + channel index */ |
| 408 | __be32 call_id; /* call ID on connection */ |
| 409 | __be32 epoch; /* epoch of this connection */ |
| 410 | __be16 service_id; /* service ID */ |
| 411 | union { /* Peer IP address for hashing */ |
| 412 | __be32 ipv4_addr; |
| 413 | __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ |
| 414 | } peer_ip; |
| 415 | }; |
| 416 | |
| 417 | /* |
| 418 | * locally abort an RxRPC call |
| 419 | */ |
| 420 | static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) |
| 421 | { |
| 422 | write_lock_bh(&call->state_lock); |
| 423 | if (call->state < RXRPC_CALL_COMPLETE) { |
| 424 | call->abort_code = abort_code; |
| 425 | call->state = RXRPC_CALL_LOCALLY_ABORTED; |
| 426 | set_bit(RXRPC_CALL_ABORT, &call->events); |
| 427 | } |
| 428 | write_unlock_bh(&call->state_lock); |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * af_rxrpc.c |
| 433 | */ |
| 434 | extern atomic_t rxrpc_n_skbs; |
| 435 | extern __be32 rxrpc_epoch; |
| 436 | extern atomic_t rxrpc_debug_id; |
| 437 | extern struct workqueue_struct *rxrpc_workqueue; |
| 438 | |
| 439 | /* |
| 440 | * ar-accept.c |
| 441 | */ |
| 442 | void rxrpc_accept_incoming_calls(struct work_struct *); |
| 443 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); |
| 444 | int rxrpc_reject_call(struct rxrpc_sock *); |
| 445 | |
| 446 | /* |
| 447 | * ar-ack.c |
| 448 | */ |
| 449 | extern unsigned rxrpc_requested_ack_delay; |
| 450 | extern unsigned rxrpc_soft_ack_delay; |
| 451 | extern unsigned rxrpc_idle_ack_delay; |
| 452 | extern unsigned rxrpc_rx_window_size; |
| 453 | extern unsigned rxrpc_rx_mtu; |
| 454 | extern unsigned rxrpc_rx_jumbo_max; |
| 455 | |
| 456 | void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); |
| 457 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); |
| 458 | void rxrpc_process_call(struct work_struct *); |
| 459 | |
| 460 | /* |
| 461 | * ar-call.c |
| 462 | */ |
| 463 | extern unsigned rxrpc_max_call_lifetime; |
| 464 | extern unsigned rxrpc_dead_call_expiry; |
| 465 | extern struct kmem_cache *rxrpc_call_jar; |
| 466 | extern struct list_head rxrpc_calls; |
| 467 | extern rwlock_t rxrpc_call_lock; |
| 468 | |
| 469 | struct rxrpc_call *rxrpc_find_call_hash(u8, __be32, __be32, __be32, |
| 470 | __be16, void *, sa_family_t, const u8 *); |
| 471 | struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, |
| 472 | struct rxrpc_transport *, |
| 473 | struct rxrpc_conn_bundle *, |
| 474 | unsigned long, int, gfp_t); |
| 475 | struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
| 476 | struct rxrpc_connection *, |
| 477 | struct rxrpc_header *, gfp_t); |
| 478 | struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long); |
| 479 | void rxrpc_release_call(struct rxrpc_call *); |
| 480 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
| 481 | void __rxrpc_put_call(struct rxrpc_call *); |
| 482 | void __exit rxrpc_destroy_all_calls(void); |
| 483 | |
| 484 | /* |
| 485 | * ar-connection.c |
| 486 | */ |
| 487 | extern unsigned rxrpc_connection_expiry; |
| 488 | extern struct list_head rxrpc_connections; |
| 489 | extern rwlock_t rxrpc_connection_lock; |
| 490 | |
| 491 | struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, |
| 492 | struct rxrpc_transport *, |
| 493 | struct key *, __be16, gfp_t); |
| 494 | void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); |
| 495 | int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, |
| 496 | struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t); |
| 497 | void rxrpc_put_connection(struct rxrpc_connection *); |
| 498 | void __exit rxrpc_destroy_all_connections(void); |
| 499 | struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, |
| 500 | struct rxrpc_header *); |
| 501 | extern struct rxrpc_connection * |
| 502 | rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, |
| 503 | gfp_t); |
| 504 | |
| 505 | /* |
| 506 | * ar-connevent.c |
| 507 | */ |
| 508 | void rxrpc_process_connection(struct work_struct *); |
| 509 | void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); |
| 510 | void rxrpc_reject_packets(struct work_struct *); |
| 511 | |
| 512 | /* |
| 513 | * ar-error.c |
| 514 | */ |
| 515 | void rxrpc_UDP_error_report(struct sock *); |
| 516 | void rxrpc_UDP_error_handler(struct work_struct *); |
| 517 | |
| 518 | /* |
| 519 | * ar-input.c |
| 520 | */ |
| 521 | extern const char *rxrpc_pkts[]; |
| 522 | |
| 523 | void rxrpc_data_ready(struct sock *); |
| 524 | int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); |
| 525 | void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); |
| 526 | |
| 527 | /* |
| 528 | * ar-local.c |
| 529 | */ |
| 530 | extern rwlock_t rxrpc_local_lock; |
| 531 | |
| 532 | struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); |
| 533 | void rxrpc_put_local(struct rxrpc_local *); |
| 534 | void __exit rxrpc_destroy_all_locals(void); |
| 535 | |
| 536 | /* |
| 537 | * ar-key.c |
| 538 | */ |
| 539 | extern struct key_type key_type_rxrpc; |
| 540 | extern struct key_type key_type_rxrpc_s; |
| 541 | |
| 542 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
| 543 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); |
| 544 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, |
| 545 | u32); |
| 546 | |
| 547 | /* |
| 548 | * ar-output.c |
| 549 | */ |
| 550 | extern unsigned rxrpc_resend_timeout; |
| 551 | |
| 552 | int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); |
| 553 | int rxrpc_client_sendmsg(struct rxrpc_sock *, struct rxrpc_transport *, |
| 554 | struct msghdr *, size_t); |
| 555 | int rxrpc_server_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
| 556 | |
| 557 | /* |
| 558 | * ar-peer.c |
| 559 | */ |
| 560 | struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); |
| 561 | void rxrpc_put_peer(struct rxrpc_peer *); |
| 562 | struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16); |
| 563 | void __exit rxrpc_destroy_all_peers(void); |
| 564 | |
| 565 | /* |
| 566 | * ar-proc.c |
| 567 | */ |
| 568 | extern const char *const rxrpc_call_states[]; |
| 569 | extern const struct file_operations rxrpc_call_seq_fops; |
| 570 | extern const struct file_operations rxrpc_connection_seq_fops; |
| 571 | |
| 572 | /* |
| 573 | * ar-recvmsg.c |
| 574 | */ |
| 575 | void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
| 576 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
| 577 | |
| 578 | /* |
| 579 | * ar-security.c |
| 580 | */ |
| 581 | int rxrpc_register_security(struct rxrpc_security *); |
| 582 | void rxrpc_unregister_security(struct rxrpc_security *); |
| 583 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
| 584 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); |
| 585 | int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t, |
| 586 | void *); |
| 587 | int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *); |
| 588 | void rxrpc_clear_conn_security(struct rxrpc_connection *); |
| 589 | |
| 590 | /* |
| 591 | * ar-skbuff.c |
| 592 | */ |
| 593 | void rxrpc_packet_destructor(struct sk_buff *); |
| 594 | |
| 595 | /* |
| 596 | * ar-transport.c |
| 597 | */ |
| 598 | extern unsigned rxrpc_transport_expiry; |
| 599 | |
| 600 | struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, |
| 601 | struct rxrpc_peer *, gfp_t); |
| 602 | void rxrpc_put_transport(struct rxrpc_transport *); |
| 603 | void __exit rxrpc_destroy_all_transports(void); |
| 604 | struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, |
| 605 | struct rxrpc_peer *); |
| 606 | |
| 607 | /* |
| 608 | * sysctl.c |
| 609 | */ |
| 610 | #ifdef CONFIG_SYSCTL |
| 611 | extern int __init rxrpc_sysctl_init(void); |
| 612 | extern void rxrpc_sysctl_exit(void); |
| 613 | #else |
| 614 | static inline int __init rxrpc_sysctl_init(void) { return 0; } |
| 615 | static inline void rxrpc_sysctl_exit(void) {} |
| 616 | #endif |
| 617 | |
| 618 | /* |
| 619 | * debug tracing |
| 620 | */ |
| 621 | extern unsigned int rxrpc_debug; |
| 622 | |
| 623 | #define dbgprintk(FMT,...) \ |
| 624 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
| 625 | |
| 626 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 627 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 628 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 629 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) |
| 630 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) |
| 631 | |
| 632 | |
| 633 | #if defined(__KDEBUG) |
| 634 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 635 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 636 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 637 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) |
| 638 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) |
| 639 | |
| 640 | #elif defined(CONFIG_AF_RXRPC_DEBUG) |
| 641 | #define RXRPC_DEBUG_KENTER 0x01 |
| 642 | #define RXRPC_DEBUG_KLEAVE 0x02 |
| 643 | #define RXRPC_DEBUG_KDEBUG 0x04 |
| 644 | #define RXRPC_DEBUG_KPROTO 0x08 |
| 645 | #define RXRPC_DEBUG_KNET 0x10 |
| 646 | |
| 647 | #define _enter(FMT,...) \ |
| 648 | do { \ |
| 649 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ |
| 650 | kenter(FMT,##__VA_ARGS__); \ |
| 651 | } while (0) |
| 652 | |
| 653 | #define _leave(FMT,...) \ |
| 654 | do { \ |
| 655 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ |
| 656 | kleave(FMT,##__VA_ARGS__); \ |
| 657 | } while (0) |
| 658 | |
| 659 | #define _debug(FMT,...) \ |
| 660 | do { \ |
| 661 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ |
| 662 | kdebug(FMT,##__VA_ARGS__); \ |
| 663 | } while (0) |
| 664 | |
| 665 | #define _proto(FMT,...) \ |
| 666 | do { \ |
| 667 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ |
| 668 | kproto(FMT,##__VA_ARGS__); \ |
| 669 | } while (0) |
| 670 | |
| 671 | #define _net(FMT,...) \ |
| 672 | do { \ |
| 673 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ |
| 674 | knet(FMT,##__VA_ARGS__); \ |
| 675 | } while (0) |
| 676 | |
| 677 | #else |
| 678 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 679 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 680 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| 681 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) |
| 682 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) |
| 683 | #endif |
| 684 | |
| 685 | /* |
| 686 | * debug assertion checking |
| 687 | */ |
| 688 | #if 1 // defined(__KDEBUGALL) |
| 689 | |
| 690 | #define ASSERT(X) \ |
| 691 | do { \ |
| 692 | if (unlikely(!(X))) { \ |
| 693 | printk(KERN_ERR "\n"); \ |
| 694 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ |
| 695 | BUG(); \ |
| 696 | } \ |
| 697 | } while(0) |
| 698 | |
| 699 | #define ASSERTCMP(X, OP, Y) \ |
| 700 | do { \ |
| 701 | if (unlikely(!((X) OP (Y)))) { \ |
| 702 | printk(KERN_ERR "\n"); \ |
| 703 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ |
| 704 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 705 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 706 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 707 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 708 | BUG(); \ |
| 709 | } \ |
| 710 | } while(0) |
| 711 | |
| 712 | #define ASSERTIF(C, X) \ |
| 713 | do { \ |
| 714 | if (unlikely((C) && !(X))) { \ |
| 715 | printk(KERN_ERR "\n"); \ |
| 716 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ |
| 717 | BUG(); \ |
| 718 | } \ |
| 719 | } while(0) |
| 720 | |
| 721 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 722 | do { \ |
| 723 | if (unlikely((C) && !((X) OP (Y)))) { \ |
| 724 | printk(KERN_ERR "\n"); \ |
| 725 | printk(KERN_ERR "RxRPC: Assertion failed\n"); \ |
| 726 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 727 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 728 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 729 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 730 | BUG(); \ |
| 731 | } \ |
| 732 | } while(0) |
| 733 | |
| 734 | #else |
| 735 | |
| 736 | #define ASSERT(X) \ |
| 737 | do { \ |
| 738 | } while(0) |
| 739 | |
| 740 | #define ASSERTCMP(X, OP, Y) \ |
| 741 | do { \ |
| 742 | } while(0) |
| 743 | |
| 744 | #define ASSERTIF(C, X) \ |
| 745 | do { \ |
| 746 | } while(0) |
| 747 | |
| 748 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 749 | do { \ |
| 750 | } while(0) |
| 751 | |
| 752 | #endif /* __KDEBUGALL */ |
| 753 | |
| 754 | /* |
| 755 | * socket buffer accounting / leak finding |
| 756 | */ |
| 757 | static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) |
| 758 | { |
| 759 | //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); |
| 760 | //atomic_inc(&rxrpc_n_skbs); |
| 761 | } |
| 762 | |
| 763 | #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) |
| 764 | |
| 765 | static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) |
| 766 | { |
| 767 | //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); |
| 768 | //atomic_dec(&rxrpc_n_skbs); |
| 769 | } |
| 770 | |
| 771 | #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) |
| 772 | |
| 773 | static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) |
| 774 | { |
| 775 | if (skb) { |
| 776 | CHECK_SLAB_OKAY(&skb->users); |
| 777 | //_net("free skb %p %s [%d]", |
| 778 | // skb, fn, atomic_read(&rxrpc_n_skbs)); |
| 779 | //atomic_dec(&rxrpc_n_skbs); |
| 780 | kfree_skb(skb); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) |
| 785 | |
| 786 | static inline void rxrpc_purge_queue(struct sk_buff_head *list) |
| 787 | { |
| 788 | struct sk_buff *skb; |
| 789 | while ((skb = skb_dequeue((list))) != NULL) |
| 790 | rxrpc_free_skb(skb); |
| 791 | } |
| 792 | |
| 793 | static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) |
| 794 | { |
| 795 | CHECK_SLAB_OKAY(&local->usage); |
| 796 | if (atomic_inc_return(&local->usage) == 1) |
| 797 | printk("resurrected (%s)\n", f); |
| 798 | } |
| 799 | |
| 800 | #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) |
| 801 | |
| 802 | #define rxrpc_get_call(CALL) \ |
| 803 | do { \ |
| 804 | CHECK_SLAB_OKAY(&(CALL)->usage); \ |
| 805 | if (atomic_inc_return(&(CALL)->usage) == 1) \ |
| 806 | BUG(); \ |
| 807 | } while(0) |
| 808 | |
| 809 | #define rxrpc_put_call(CALL) \ |
| 810 | do { \ |
| 811 | __rxrpc_put_call(CALL); \ |
| 812 | } while(0) |