blob: c779b50135f6b2e7ff5fa0946a42460db08bddbf [file] [log] [blame]
David Howells17926a72007-04-26 15:48:28 -07001/* 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 Howellsbe6e6702016-04-04 14:00:32 +010012#include <linux/atomic.h>
David Howells8496af52016-07-01 07:51:50 +010013#include <linux/seqlock.h>
David Howellse0e4d822016-04-07 17:23:58 +010014#include <net/sock.h>
David Howellsbe6e6702016-04-04 14:00:32 +010015#include <net/af_rxrpc.h>
David Howells17926a72007-04-26 15:48:28 -070016#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 Howellsb4f13422016-03-04 15:56:19 +000023#define CHECK_SLAB_OKAY(X) do {} while (0)
David Howells17926a72007-04-26 15:48:28 -070024#endif
25
David Howells17926a72007-04-26 15:48:28 -070026#define FCRYPT_BSIZE 8
27struct rxrpc_crypt {
28 union {
29 u8 x[FCRYPT_BSIZE];
Al Viro91e916c2008-03-29 03:08:38 +000030 __be32 n[2];
David Howells17926a72007-04-26 15:48:28 -070031 };
32} __attribute__((aligned(8)));
33
David Howells651350d2007-04-26 15:50:17 -070034#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 Howells17926a72007-04-26 15:48:28 -070039
David Howellscc8feb82016-04-04 14:00:37 +010040struct rxrpc_connection;
41
David Howells17926a72007-04-26 15:48:28 -070042/*
43 * sk_state for RxRPC sockets
44 */
45enum {
David Howells2341e072016-06-09 23:02:51 +010046 RXRPC_UNBOUND = 0,
47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
David Howells17926a72007-04-26 15:48:28 -070048 RXRPC_CLIENT_BOUND, /* client local address bound */
David Howells17926a72007-04-26 15:48:28 -070049 RXRPC_SERVER_BOUND, /* server local address bound */
50 RXRPC_SERVER_LISTENING, /* server listening for connections */
51 RXRPC_CLOSE, /* socket is being closed */
52};
53
54/*
55 * RxRPC socket definition
56 */
57struct rxrpc_sock {
58 /* WARNING: sk has to be the first member */
59 struct sock sk;
David Howells651350d2007-04-26 15:50:17 -070060 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
David Howells17926a72007-04-26 15:48:28 -070061 struct rxrpc_local *local; /* local endpoint */
David Howells17926a72007-04-26 15:48:28 -070062 struct list_head listen_link; /* link in the local endpoint's listen list */
63 struct list_head secureq; /* calls awaiting connection security clearance */
64 struct list_head acceptq; /* calls awaiting acceptance */
65 struct key *key; /* security for this socket */
66 struct key *securities; /* list of server security descriptors */
67 struct rb_root calls; /* outstanding calls on this socket */
68 unsigned long flags;
David Howells2341e072016-06-09 23:02:51 +010069#define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
David Howells17926a72007-04-26 15:48:28 -070070 rwlock_t call_lock; /* lock for calls */
71 u32 min_sec_level; /* minimum security level */
72#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
David Howellscc8feb82016-04-04 14:00:37 +010073 bool exclusive; /* Exclusive connection for a client socket */
74 sa_family_t family; /* Protocol family created with */
David Howells17926a72007-04-26 15:48:28 -070075 struct sockaddr_rxrpc srx; /* local address */
David Howells2341e072016-06-09 23:02:51 +010076 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
David Howells17926a72007-04-26 15:48:28 -070077};
78
79#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
80
81/*
David Howells0d12f8a2016-03-04 15:53:46 +000082 * CPU-byteorder normalised Rx packet header.
83 */
84struct rxrpc_host_header {
85 u32 epoch; /* client boot timestamp */
86 u32 cid; /* connection and channel ID */
87 u32 callNumber; /* call ID (0 for connection-level packets) */
88 u32 seq; /* sequence number of pkt in call stream */
89 u32 serial; /* serial number of pkt sent to network */
90 u8 type; /* packet type */
91 u8 flags; /* packet flags */
92 u8 userStatus; /* app-layer defined status */
93 u8 securityIndex; /* security protocol ID */
94 union {
95 u16 _rsvd; /* reserved */
96 u16 cksum; /* kerberos security checksum */
97 };
98 u16 serviceId; /* service ID */
99} __packed;
100
101/*
David Howells17926a72007-04-26 15:48:28 -0700102 * RxRPC socket buffer private variables
103 * - max 48 bytes (struct sk_buff::cb)
104 */
105struct rxrpc_skb_priv {
106 struct rxrpc_call *call; /* call with which associated */
107 unsigned long resend_at; /* time in jiffies at which to resend */
108 union {
Eric Dumazet95c96172012-04-15 05:58:06 +0000109 unsigned int offset; /* offset into buffer of next read */
David Howells17926a72007-04-26 15:48:28 -0700110 int remain; /* amount of space remaining for next write */
111 u32 error; /* network error code */
112 bool need_resend; /* T if needs resending */
113 };
114
David Howells0d12f8a2016-03-04 15:53:46 +0000115 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
David Howells17926a72007-04-26 15:48:28 -0700116};
117
118#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
119
David Howells17926a72007-04-26 15:48:28 -0700120enum rxrpc_command {
121 RXRPC_CMD_SEND_DATA, /* send data message */
122 RXRPC_CMD_SEND_ABORT, /* request abort generation */
123 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
124 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
125};
126
127/*
128 * RxRPC security module interface
129 */
130struct rxrpc_security {
David Howells17926a72007-04-26 15:48:28 -0700131 const char *name; /* name of this service */
132 u8 security_index; /* security type provided */
133
David Howells648af7f2016-04-07 17:23:51 +0100134 /* Initialise a security service */
135 int (*init)(void);
136
137 /* Clean up a security service */
138 void (*exit)(void);
139
David Howells17926a72007-04-26 15:48:28 -0700140 /* initialise a connection's security */
141 int (*init_connection_security)(struct rxrpc_connection *);
142
143 /* prime a connection's packet security */
Herbert Xua2636292016-06-26 14:55:24 -0700144 int (*prime_packet_security)(struct rxrpc_connection *);
David Howells17926a72007-04-26 15:48:28 -0700145
146 /* impose security on a packet */
Herbert Xua2636292016-06-26 14:55:24 -0700147 int (*secure_packet)(struct rxrpc_call *,
David Howells17926a72007-04-26 15:48:28 -0700148 struct sk_buff *,
149 size_t,
150 void *);
151
152 /* verify the security on a received packet */
Herbert Xua2636292016-06-26 14:55:24 -0700153 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *);
David Howells17926a72007-04-26 15:48:28 -0700154
155 /* issue a challenge */
156 int (*issue_challenge)(struct rxrpc_connection *);
157
158 /* respond to a challenge */
159 int (*respond_to_challenge)(struct rxrpc_connection *,
160 struct sk_buff *,
161 u32 *);
162
163 /* verify a response */
164 int (*verify_response)(struct rxrpc_connection *,
165 struct sk_buff *,
166 u32 *);
167
168 /* clear connection security */
169 void (*clear)(struct rxrpc_connection *);
170};
171
172/*
David Howells4f95dd72016-04-04 14:00:35 +0100173 * RxRPC local transport endpoint description
174 * - owned by a single AF_RXRPC socket
175 * - pointed to by transport socket struct sk_user_data
David Howells17926a72007-04-26 15:48:28 -0700176 */
177struct rxrpc_local {
David Howells4f95dd72016-04-04 14:00:35 +0100178 struct rcu_head rcu;
179 atomic_t usage;
180 struct list_head link;
David Howells17926a72007-04-26 15:48:28 -0700181 struct socket *socket; /* my UDP socket */
David Howells4f95dd72016-04-04 14:00:35 +0100182 struct work_struct processor;
David Howells17926a72007-04-26 15:48:28 -0700183 struct list_head services; /* services listening on this endpoint */
David Howells17926a72007-04-26 15:48:28 -0700184 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
185 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
186 struct sk_buff_head reject_queue; /* packets awaiting rejection */
David Howells44ba0692015-04-01 16:31:26 +0100187 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
David Howells999b69f2016-06-17 15:42:35 +0100188 struct rb_root client_conns; /* Client connections by socket params */
189 spinlock_t client_conns_lock; /* Lock for client_conns */
David Howells17926a72007-04-26 15:48:28 -0700190 spinlock_t lock; /* access lock */
191 rwlock_t services_lock; /* lock for services list */
David Howells17926a72007-04-26 15:48:28 -0700192 int debug_id; /* debug ID for printks */
David Howells4f95dd72016-04-04 14:00:35 +0100193 bool dead;
David Howells17926a72007-04-26 15:48:28 -0700194 struct sockaddr_rxrpc srx; /* local address */
195};
196
197/*
198 * RxRPC remote transport endpoint definition
David Howellsbe6e6702016-04-04 14:00:32 +0100199 * - matched by local endpoint, remote port, address and protocol type
David Howells17926a72007-04-26 15:48:28 -0700200 */
201struct rxrpc_peer {
David Howellsbe6e6702016-04-04 14:00:32 +0100202 struct rcu_head rcu; /* This must be first */
203 atomic_t usage;
204 unsigned long hash_key;
205 struct hlist_node hash_link;
206 struct rxrpc_local *local;
David Howellsf66d7492016-04-04 14:00:34 +0100207 struct hlist_head error_targets; /* targets for net error distribution */
208 struct work_struct error_distributor;
David Howellsaa390bb2016-06-17 10:06:56 +0100209 struct rb_root service_conns; /* Service connections */
David Howells8496af52016-07-01 07:51:50 +0100210 seqlock_t service_conn_lock;
David Howells17926a72007-04-26 15:48:28 -0700211 spinlock_t lock; /* access lock */
Eric Dumazet95c96172012-04-15 05:58:06 +0000212 unsigned int if_mtu; /* interface MTU for this peer */
213 unsigned int mtu; /* network MTU for this peer */
214 unsigned int maxdata; /* data size (MTU - hdrsize) */
David Howells17926a72007-04-26 15:48:28 -0700215 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
216 int debug_id; /* debug ID for printks */
David Howellsf66d7492016-04-04 14:00:34 +0100217 int error_report; /* Net (+0) or local (+1000000) to distribute */
218#define RXRPC_LOCAL_ERROR_OFFSET 1000000
David Howells17926a72007-04-26 15:48:28 -0700219 struct sockaddr_rxrpc srx; /* remote address */
220
221 /* calculated RTT cache */
222#define RXRPC_RTT_CACHE_SIZE 32
223 suseconds_t rtt; /* current RTT estimate (in uS) */
Eric Dumazet95c96172012-04-15 05:58:06 +0000224 unsigned int rtt_point; /* next entry at which to insert */
225 unsigned int rtt_usage; /* amount of cache actually used */
David Howells17926a72007-04-26 15:48:28 -0700226 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
227};
228
229/*
David Howells19ffa012016-04-04 14:00:36 +0100230 * Keys for matching a connection.
231 */
232struct rxrpc_conn_proto {
David Howellse8d70ce2016-06-30 12:16:21 +0100233 union {
234 struct {
235 u32 epoch; /* epoch of this connection */
236 u32 cid; /* connection ID */
237 };
238 u64 index_key;
David Howells19ffa012016-04-04 14:00:36 +0100239 };
240};
241
242struct rxrpc_conn_parameters {
243 struct rxrpc_local *local; /* Representation of local endpoint */
244 struct rxrpc_peer *peer; /* Remote endpoint */
245 struct key *key; /* Security details */
246 bool exclusive; /* T if conn is exclusive */
247 u16 service_id; /* Service ID for this connection */
248 u32 security_level; /* Security level selected */
249};
250
251/*
David Howellsbba304d2016-06-27 10:32:02 +0100252 * Bits in the connection flags.
253 */
254enum rxrpc_conn_flag {
255 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
David Howells001c1122016-06-30 10:45:22 +0100256 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
257 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
David Howellsbba304d2016-06-27 10:32:02 +0100258};
259
260/*
261 * Events that can be raised upon a connection.
262 */
263enum rxrpc_conn_event {
264 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
265};
266
267/*
268 * The connection protocol state.
269 */
270enum rxrpc_conn_proto_state {
271 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
272 RXRPC_CONN_CLIENT, /* Client connection */
273 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
274 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
275 RXRPC_CONN_SERVICE, /* Service secured connection */
276 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
277 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
278 RXRPC_CONN_NETWORK_ERROR, /* Conn terminated by network error */
279 RXRPC_CONN__NR_STATES
280};
281
282/*
David Howells17926a72007-04-26 15:48:28 -0700283 * RxRPC connection definition
David Howellsaa390bb2016-06-17 10:06:56 +0100284 * - matched by { local, peer, epoch, conn_id, direction }
David Howells17926a72007-04-26 15:48:28 -0700285 * - each connection can only handle four simultaneous calls
286 */
287struct rxrpc_connection {
David Howells19ffa012016-04-04 14:00:36 +0100288 struct rxrpc_conn_proto proto;
289 struct rxrpc_conn_parameters params;
290
David Howells999b69f2016-06-17 15:42:35 +0100291 spinlock_t channel_lock;
David Howellsa1399f82016-06-27 14:39:44 +0100292
293 struct rxrpc_channel {
294 struct rxrpc_call __rcu *call; /* Active call */
295 u32 call_id; /* ID of current call */
296 u32 call_counter; /* Call ID counter */
297 u32 last_call; /* ID of last call */
298 u32 last_result; /* Result of last call (0/abort) */
299 } channels[RXRPC_MAXCALLS];
David Howells999b69f2016-06-17 15:42:35 +0100300 wait_queue_head_t channel_wq; /* queue to wait for channel to become available */
301
David Howellsdee46362016-06-27 17:11:19 +0100302 struct rcu_head rcu;
David Howells17926a72007-04-26 15:48:28 -0700303 struct work_struct processor; /* connection event processor */
David Howells999b69f2016-06-17 15:42:35 +0100304 union {
305 struct rb_node client_node; /* Node in local->client_conns */
David Howellsaa390bb2016-06-17 10:06:56 +0100306 struct rb_node service_node; /* Node in peer->service_conns */
David Howells999b69f2016-06-17 15:42:35 +0100307 };
David Howells17926a72007-04-26 15:48:28 -0700308 struct list_head link; /* link in master connection list */
David Howells17926a72007-04-26 15:48:28 -0700309 struct sk_buff_head rx_queue; /* received conn-level packets */
David Howells648af7f2016-04-07 17:23:51 +0100310 const struct rxrpc_security *security; /* applied security module */
David Howells17926a72007-04-26 15:48:28 -0700311 struct key *server_key; /* security for this service */
Herbert Xu1afe5932016-01-24 21:19:01 +0800312 struct crypto_skcipher *cipher; /* encryption handle */
David Howells17926a72007-04-26 15:48:28 -0700313 struct rxrpc_crypt csum_iv; /* packet checksum base */
David Howells4a3388c2016-04-04 14:00:37 +0100314 unsigned long flags;
David Howells17926a72007-04-26 15:48:28 -0700315 unsigned long events;
David Howellsf51b4482016-08-23 15:27:24 +0100316 unsigned long idle_timestamp; /* Time at which last became idle */
David Howells17926a72007-04-26 15:48:28 -0700317 spinlock_t state_lock; /* state-change lock */
318 atomic_t usage;
David Howellsbba304d2016-06-27 10:32:02 +0100319 enum rxrpc_conn_proto_state state : 8; /* current state of connection */
David Howellsdc44b3a2016-04-07 17:23:30 +0100320 u32 local_abort; /* local abort code */
321 u32 remote_abort; /* remote abort code */
322 int error; /* local error incurred */
David Howells17926a72007-04-26 15:48:28 -0700323 int debug_id; /* debug ID for printks */
David Howells17926a72007-04-26 15:48:28 -0700324 atomic_t serial; /* packet serial number counter */
David Howells563ea7d2016-08-23 15:27:25 +0100325 unsigned int hi_serial; /* highest serial number received */
David Howells999b69f2016-06-17 15:42:35 +0100326 atomic_t avail_chans; /* number of channels available */
David Howells17926a72007-04-26 15:48:28 -0700327 u8 size_align; /* data size alignment (for security) */
328 u8 header_size; /* rxrpc + security header size */
329 u8 security_size; /* security header size */
David Howells17926a72007-04-26 15:48:28 -0700330 u32 security_nonce; /* response re-use preventer */
David Howells17926a72007-04-26 15:48:28 -0700331 u8 security_ix; /* security type */
David Howells17926a72007-04-26 15:48:28 -0700332 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
333};
334
335/*
David Howells5b8848d2016-03-04 15:53:46 +0000336 * Flags in call->flags.
337 */
338enum rxrpc_call_flag {
339 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
340 RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */
341 RXRPC_CALL_RCVD_LAST, /* all packets received */
342 RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */
343 RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */
David Howells5b8848d2016-03-04 15:53:46 +0000344 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */
345 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
346 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */
David Howellsdabe5a72016-08-23 15:27:24 +0100347 RXRPC_CALL_IS_SERVICE, /* Call is service call */
David Howells5b8848d2016-03-04 15:53:46 +0000348};
349
350/*
351 * Events that can be raised on a call.
352 */
353enum rxrpc_call_event {
David Howells4c198ad2016-03-04 15:53:46 +0000354 RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */
355 RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */
356 RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */
357 RXRPC_CALL_EV_RCVD_ERROR, /* network error received */
358 RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */
359 RXRPC_CALL_EV_ACK, /* need to generate ACK */
360 RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */
361 RXRPC_CALL_EV_ABORT, /* need to generate abort */
362 RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */
363 RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */
364 RXRPC_CALL_EV_RESEND, /* Tx resend required */
365 RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */
366 RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */
367 RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */
368 RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */
369 RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */
370 RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */
David Howells5b8848d2016-03-04 15:53:46 +0000371};
372
373/*
374 * The states that a call can be in.
375 */
376enum rxrpc_call_state {
David Howells999b69f2016-06-17 15:42:35 +0100377 RXRPC_CALL_UNINITIALISED,
378 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
David Howells5b8848d2016-03-04 15:53:46 +0000379 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
380 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
381 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
382 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
383 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
384 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
385 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
386 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
387 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
388 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
389 RXRPC_CALL_COMPLETE, /* - call completed */
390 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
391 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
392 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
393 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
394 RXRPC_CALL_DEAD, /* - call is dead */
395 NR__RXRPC_CALL_STATES
396};
397
398/*
David Howells17926a72007-04-26 15:48:28 -0700399 * RxRPC call definition
400 * - matched by { connection, call_id }
401 */
402struct rxrpc_call {
David Howellsdee46362016-06-27 17:11:19 +0100403 struct rcu_head rcu;
David Howells17926a72007-04-26 15:48:28 -0700404 struct rxrpc_connection *conn; /* connection carrying call */
405 struct rxrpc_sock *socket; /* socket responsible */
406 struct timer_list lifetimer; /* lifetime remaining on call */
407 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
408 struct timer_list ack_timer; /* ACK generation timer */
409 struct timer_list resend_timer; /* Tx resend timer */
410 struct work_struct destroyer; /* call destroyer */
411 struct work_struct processor; /* packet processor and ACK generator */
412 struct list_head link; /* link in master call list */
David Howellsf66d7492016-04-04 14:00:34 +0100413 struct hlist_node error_link; /* link in error distribution list */
David Howells17926a72007-04-26 15:48:28 -0700414 struct list_head accept_link; /* calls awaiting acceptance */
415 struct rb_node sock_node; /* node in socket call tree */
David Howells17926a72007-04-26 15:48:28 -0700416 struct sk_buff_head rx_queue; /* received packets */
417 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
418 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
419 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
Herbert Xua2636292016-06-26 14:55:24 -0700420 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
David Howells17926a72007-04-26 15:48:28 -0700421 unsigned long user_call_ID; /* user-defined call ID */
422 unsigned long creation_jif; /* time of call creation */
423 unsigned long flags;
David Howells17926a72007-04-26 15:48:28 -0700424 unsigned long events;
David Howells17926a72007-04-26 15:48:28 -0700425 spinlock_t lock;
426 rwlock_t state_lock; /* lock for state transition */
427 atomic_t usage;
David Howells372ee162016-08-03 14:11:40 +0100428 atomic_t skb_count; /* Outstanding packets on this call */
David Howells17926a72007-04-26 15:48:28 -0700429 atomic_t sequence; /* Tx data packet sequence counter */
David Howellsdc44b3a2016-04-07 17:23:30 +0100430 u32 local_abort; /* local abort code */
431 u32 remote_abort; /* remote abort code */
David Howellsf66d7492016-04-04 14:00:34 +0100432 int error_report; /* Network error (ICMP/local transport) */
433 int error; /* Local error incurred */
David Howells5b8848d2016-03-04 15:53:46 +0000434 enum rxrpc_call_state state : 8; /* current state of call */
David Howellsdabe5a72016-08-23 15:27:24 +0100435 u16 service_id; /* service ID */
436 u32 call_id; /* call ID on connection */
437 u32 cid; /* connection ID plus channel index */
438 int debug_id; /* debug ID for printks */
David Howells17926a72007-04-26 15:48:28 -0700439
440 /* transmission-phase ACK management */
David Howells4e36a952009-09-16 00:01:13 -0700441 u8 acks_head; /* offset into window of first entry */
442 u8 acks_tail; /* offset into window of last entry */
443 u8 acks_winsz; /* size of un-ACK'd window */
444 u8 acks_unacked; /* lowest unacked packet in last ACK received */
David Howells17926a72007-04-26 15:48:28 -0700445 int acks_latest; /* serial number of latest ACK received */
446 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
447 unsigned long *acks_window; /* sent packet window
448 * - elements are pointers with LSB set if ACK'd
449 */
450
451 /* receive-phase ACK management */
452 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
453 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
454 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
455 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
456 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
457 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
David Howells0d12f8a2016-03-04 15:53:46 +0000458 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
David Howells4e36a952009-09-16 00:01:13 -0700459 u8 ackr_reason; /* reason to ACK */
David Howells563ea7d2016-08-23 15:27:25 +0100460 u16 ackr_skew; /* skew on packet being ACK'd */
David Howells0d12f8a2016-03-04 15:53:46 +0000461 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
David Howells17926a72007-04-26 15:48:28 -0700462 atomic_t ackr_not_idle; /* number of packets in Rx queue */
463
464 /* received packet records, 1 bit per record */
465#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
466 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
David Howells17926a72007-04-26 15:48:28 -0700467};
468
469/*
David Howells17926a72007-04-26 15:48:28 -0700470 * locally abort an RxRPC call
471 */
472static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
473{
474 write_lock_bh(&call->state_lock);
475 if (call->state < RXRPC_CALL_COMPLETE) {
David Howellsdc44b3a2016-04-07 17:23:30 +0100476 call->local_abort = abort_code;
David Howells17926a72007-04-26 15:48:28 -0700477 call->state = RXRPC_CALL_LOCALLY_ABORTED;
David Howells4c198ad2016-03-04 15:53:46 +0000478 set_bit(RXRPC_CALL_EV_ABORT, &call->events);
David Howells17926a72007-04-26 15:48:28 -0700479 }
480 write_unlock_bh(&call->state_lock);
481}
482
David Howellsdf844fd2016-08-23 15:27:24 +0100483#include <trace/events/rxrpc.h>
484
David Howells17926a72007-04-26 15:48:28 -0700485/*
David Howells651350d2007-04-26 15:50:17 -0700486 * af_rxrpc.c
David Howells17926a72007-04-26 15:48:28 -0700487 */
David Howells651350d2007-04-26 15:50:17 -0700488extern atomic_t rxrpc_n_skbs;
David Howells0d12f8a2016-03-04 15:53:46 +0000489extern u32 rxrpc_epoch;
David Howells651350d2007-04-26 15:50:17 -0700490extern atomic_t rxrpc_debug_id;
491extern struct workqueue_struct *rxrpc_workqueue;
David Howells17926a72007-04-26 15:48:28 -0700492
493/*
David Howells0d81a512016-06-13 13:30:30 +0100494 * call_accept.c
David Howells17926a72007-04-26 15:48:28 -0700495 */
David Howells4f95dd72016-04-04 14:00:35 +0100496void rxrpc_accept_incoming_calls(struct rxrpc_local *);
Joe Perchesc1b12032013-10-18 13:48:25 -0700497struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
498int rxrpc_reject_call(struct rxrpc_sock *);
David Howells17926a72007-04-26 15:48:28 -0700499
500/*
David Howells0d81a512016-06-13 13:30:30 +0100501 * call_event.c
David Howells17926a72007-04-26 15:48:28 -0700502 */
David Howells563ea7d2016-08-23 15:27:25 +0100503void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
504void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
Joe Perchesc1b12032013-10-18 13:48:25 -0700505void rxrpc_process_call(struct work_struct *);
David Howells17926a72007-04-26 15:48:28 -0700506
507/*
David Howells0d81a512016-06-13 13:30:30 +0100508 * call_object.c
David Howells17926a72007-04-26 15:48:28 -0700509 */
David Howellsdad8aff2016-03-09 23:22:56 +0000510extern unsigned int rxrpc_max_call_lifetime;
511extern unsigned int rxrpc_dead_call_expiry;
David Howells17926a72007-04-26 15:48:28 -0700512extern struct kmem_cache *rxrpc_call_jar;
513extern struct list_head rxrpc_calls;
514extern rwlock_t rxrpc_call_lock;
515
David Howells2341e072016-06-09 23:02:51 +0100516struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
517struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
David Howells19ffa012016-04-04 14:00:36 +0100518 struct rxrpc_conn_parameters *,
David Howells999b69f2016-06-17 15:42:35 +0100519 struct sockaddr_rxrpc *,
David Howells2341e072016-06-09 23:02:51 +0100520 unsigned long, gfp_t);
Joe Perchesc1b12032013-10-18 13:48:25 -0700521struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
522 struct rxrpc_connection *,
David Howells42886ff2016-06-16 13:31:07 +0100523 struct sk_buff *);
Joe Perchesc1b12032013-10-18 13:48:25 -0700524void rxrpc_release_call(struct rxrpc_call *);
525void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
526void __rxrpc_put_call(struct rxrpc_call *);
527void __exit rxrpc_destroy_all_calls(void);
David Howells17926a72007-04-26 15:48:28 -0700528
David Howellsdabe5a72016-08-23 15:27:24 +0100529static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
530{
531 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
532}
533
534static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
535{
536 return !rxrpc_is_service_call(call);
537}
538
David Howells17926a72007-04-26 15:48:28 -0700539/*
David Howells4a3388c2016-04-04 14:00:37 +0100540 * conn_client.c
541 */
542extern struct idr rxrpc_client_conn_ids;
543
David Howellseb9b9d22016-06-27 10:32:02 +0100544void rxrpc_destroy_client_conn_ids(void);
David Howellsc6d2b8d2016-04-04 14:00:40 +0100545int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
546 struct sockaddr_rxrpc *, gfp_t);
David Howells001c1122016-06-30 10:45:22 +0100547void rxrpc_unpublish_client_conn(struct rxrpc_connection *);
David Howells4a3388c2016-04-04 14:00:37 +0100548
549/*
David Howells0d81a512016-06-13 13:30:30 +0100550 * conn_event.c
551 */
552void rxrpc_process_connection(struct work_struct *);
553void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
David Howells4f95dd72016-04-04 14:00:35 +0100554void rxrpc_reject_packets(struct rxrpc_local *);
David Howells0d81a512016-06-13 13:30:30 +0100555
556/*
557 * conn_object.c
David Howells17926a72007-04-26 15:48:28 -0700558 */
David Howellsdad8aff2016-03-09 23:22:56 +0000559extern unsigned int rxrpc_connection_expiry;
David Howells17926a72007-04-26 15:48:28 -0700560extern struct list_head rxrpc_connections;
561extern rwlock_t rxrpc_connection_lock;
562
David Howells8496af52016-07-01 07:51:50 +0100563int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
David Howellsc6d2b8d2016-04-04 14:00:40 +0100564struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
David Howells8496af52016-07-01 07:51:50 +0100565struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
566 struct sk_buff *);
David Howellsa1399f82016-06-27 14:39:44 +0100567void __rxrpc_disconnect_call(struct rxrpc_call *);
David Howells999b69f2016-06-17 15:42:35 +0100568void rxrpc_disconnect_call(struct rxrpc_call *);
David Howellsf51b4482016-08-23 15:27:24 +0100569void __rxrpc_put_connection(struct rxrpc_connection *);
Joe Perchesc1b12032013-10-18 13:48:25 -0700570void __exit rxrpc_destroy_all_connections(void);
David Howells17926a72007-04-26 15:48:28 -0700571
David Howells19ffa012016-04-04 14:00:36 +0100572static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
573{
574 return conn->out_clientflag;
575}
576
577static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
578{
David Howellse8d70ce2016-06-30 12:16:21 +0100579 return !rxrpc_conn_is_client(conn);
David Howells19ffa012016-04-04 14:00:36 +0100580}
581
David Howells5627cc82016-04-04 14:00:38 +0100582static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
583{
584 atomic_inc(&conn->usage);
585}
586
David Howells2c4579e2016-06-27 10:32:03 +0100587static inline
588struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
589{
590 return atomic_inc_not_zero(&conn->usage) ? conn : NULL;
591}
David Howells5acbee42016-06-27 10:32:02 +0100592
David Howellsf51b4482016-08-23 15:27:24 +0100593static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
594{
595 if (conn && atomic_dec_return(&conn->usage) == 1)
596 __rxrpc_put_connection(conn);
597}
598
599
David Howells8496af52016-07-01 07:51:50 +0100600static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn)
David Howells5acbee42016-06-27 10:32:02 +0100601{
David Howells8496af52016-07-01 07:51:50 +0100602 if (!rxrpc_get_connection_maybe(conn))
603 return false;
604 if (!rxrpc_queue_work(&conn->processor))
David Howells2c4579e2016-06-27 10:32:03 +0100605 rxrpc_put_connection(conn);
David Howells8496af52016-07-01 07:51:50 +0100606 return true;
David Howells5acbee42016-06-27 10:32:02 +0100607}
608
David Howells17926a72007-04-26 15:48:28 -0700609/*
David Howells7877a4a2016-04-04 14:00:40 +0100610 * conn_service.c
611 */
David Howells8496af52016-07-01 07:51:50 +0100612struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
613 struct sk_buff *);
David Howells7877a4a2016-04-04 14:00:40 +0100614struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *,
David Howellsd991b4a2016-06-29 14:40:39 +0100615 struct sockaddr_rxrpc *,
David Howells7877a4a2016-04-04 14:00:40 +0100616 struct sk_buff *);
David Howells001c1122016-06-30 10:45:22 +0100617void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
David Howells7877a4a2016-04-04 14:00:40 +0100618
619/*
David Howells0d81a512016-06-13 13:30:30 +0100620 * input.c
David Howells17926a72007-04-26 15:48:28 -0700621 */
David S. Miller676d2362014-04-11 16:15:36 -0400622void rxrpc_data_ready(struct sock *);
Joe Perchesc1b12032013-10-18 13:48:25 -0700623int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
624void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
David Howells17926a72007-04-26 15:48:28 -0700625
626/*
David Howells0d81a512016-06-13 13:30:30 +0100627 * insecure.c
David Howells17926a72007-04-26 15:48:28 -0700628 */
David Howells0d81a512016-06-13 13:30:30 +0100629extern const struct rxrpc_security rxrpc_no_security;
David Howells17926a72007-04-26 15:48:28 -0700630
631/*
David Howells0d81a512016-06-13 13:30:30 +0100632 * key.c
David Howells17926a72007-04-26 15:48:28 -0700633 */
634extern struct key_type key_type_rxrpc;
635extern struct key_type key_type_rxrpc_s;
636
Joe Perchesc1b12032013-10-18 13:48:25 -0700637int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
638int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
639int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
640 u32);
David Howells17926a72007-04-26 15:48:28 -0700641
642/*
David Howells87563612016-04-04 14:00:34 +0100643 * local_event.c
644 */
David Howells4f95dd72016-04-04 14:00:35 +0100645extern void rxrpc_process_local_events(struct rxrpc_local *);
David Howells87563612016-04-04 14:00:34 +0100646
647/*
David Howells0d81a512016-06-13 13:30:30 +0100648 * local_object.c
David Howells17926a72007-04-26 15:48:28 -0700649 */
David Howells4f95dd72016-04-04 14:00:35 +0100650struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
651void __rxrpc_put_local(struct rxrpc_local *);
David Howells0d81a512016-06-13 13:30:30 +0100652void __exit rxrpc_destroy_all_locals(void);
David Howellse0e4d822016-04-07 17:23:58 +0100653
David Howells4f95dd72016-04-04 14:00:35 +0100654static inline void rxrpc_get_local(struct rxrpc_local *local)
655{
656 atomic_inc(&local->usage);
657}
658
659static inline
660struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
661{
662 return atomic_inc_not_zero(&local->usage) ? local : NULL;
663}
664
665static inline void rxrpc_put_local(struct rxrpc_local *local)
666{
David Howells5627cc82016-04-04 14:00:38 +0100667 if (local && atomic_dec_and_test(&local->usage))
David Howells4f95dd72016-04-04 14:00:35 +0100668 __rxrpc_put_local(local);
669}
670
David Howells5acbee42016-06-27 10:32:02 +0100671static inline void rxrpc_queue_local(struct rxrpc_local *local)
672{
673 rxrpc_queue_work(&local->processor);
674}
675
David Howellse0e4d822016-04-07 17:23:58 +0100676/*
David Howells8e688d92016-04-07 17:23:16 +0100677 * misc.c
678 */
David Howells0e119b42016-06-10 22:30:37 +0100679extern unsigned int rxrpc_max_backlog __read_mostly;
David Howells8e688d92016-04-07 17:23:16 +0100680extern unsigned int rxrpc_requested_ack_delay;
681extern unsigned int rxrpc_soft_ack_delay;
682extern unsigned int rxrpc_idle_ack_delay;
683extern unsigned int rxrpc_rx_window_size;
684extern unsigned int rxrpc_rx_mtu;
685extern unsigned int rxrpc_rx_jumbo_max;
686
David Howells5b3e87f2016-04-07 17:23:23 +0100687extern const char *const rxrpc_pkts[];
David Howells8e688d92016-04-07 17:23:16 +0100688extern const s8 rxrpc_ack_priority[];
689
690extern const char *rxrpc_acks(u8 reason);
691
692/*
David Howells0d81a512016-06-13 13:30:30 +0100693 * output.c
694 */
695extern unsigned int rxrpc_resend_timeout;
696
David Howells985a5c82016-06-17 11:53:37 +0100697int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *);
David Howells0d81a512016-06-13 13:30:30 +0100698int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
699
700/*
David Howellsabe89ef2016-04-04 14:00:32 +0100701 * peer_event.c
David Howells0d81a512016-06-13 13:30:30 +0100702 */
David Howellsabe89ef2016-04-04 14:00:32 +0100703void rxrpc_error_report(struct sock *);
David Howellsf66d7492016-04-04 14:00:34 +0100704void rxrpc_peer_error_distributor(struct work_struct *);
David Howells0d81a512016-06-13 13:30:30 +0100705
706/*
707 * peer_object.c
708 */
David Howellsbe6e6702016-04-04 14:00:32 +0100709struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
710 const struct sockaddr_rxrpc *);
711struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
712 struct sockaddr_rxrpc *, gfp_t);
713struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
714
715static inline void rxrpc_get_peer(struct rxrpc_peer *peer)
716{
717 atomic_inc(&peer->usage);
718}
719
720static inline
721struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
722{
723 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
724}
725
726extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
727static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
728{
David Howells5627cc82016-04-04 14:00:38 +0100729 if (peer && atomic_dec_and_test(&peer->usage))
David Howellsbe6e6702016-04-04 14:00:32 +0100730 __rxrpc_put_peer(peer);
731}
David Howells0d81a512016-06-13 13:30:30 +0100732
733/*
734 * proc.c
735 */
736extern const char *const rxrpc_call_states[];
737extern const struct file_operations rxrpc_call_seq_fops;
738extern const struct file_operations rxrpc_connection_seq_fops;
739
740/*
741 * recvmsg.c
742 */
743void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
744int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
745
746/*
David Howells648af7f2016-04-07 17:23:51 +0100747 * rxkad.c
748 */
749#ifdef CONFIG_RXKAD
750extern const struct rxrpc_security rxkad;
751#endif
752
753/*
David Howells0d81a512016-06-13 13:30:30 +0100754 * security.c
755 */
756int __init rxrpc_init_security(void);
757void rxrpc_exit_security(void);
758int rxrpc_init_client_conn_security(struct rxrpc_connection *);
759int rxrpc_init_server_conn_security(struct rxrpc_connection *);
760
761/*
762 * skbuff.c
763 */
764void rxrpc_packet_destructor(struct sk_buff *);
David Howellsdf844fd2016-08-23 15:27:24 +0100765void rxrpc_new_skb(struct sk_buff *);
766void rxrpc_see_skb(struct sk_buff *);
767void rxrpc_get_skb(struct sk_buff *);
768void rxrpc_free_skb(struct sk_buff *);
769void rxrpc_purge_queue(struct sk_buff_head *);
David Howells0d81a512016-06-13 13:30:30 +0100770
771/*
David Howells5873c082014-02-07 18:58:44 +0000772 * sysctl.c
773 */
774#ifdef CONFIG_SYSCTL
775extern int __init rxrpc_sysctl_init(void);
776extern void rxrpc_sysctl_exit(void);
777#else
778static inline int __init rxrpc_sysctl_init(void) { return 0; }
779static inline void rxrpc_sysctl_exit(void) {}
780#endif
781
782/*
David Howellsbe6e6702016-04-04 14:00:32 +0100783 * utils.c
784 */
David Howellsd991b4a2016-06-29 14:40:39 +0100785int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
David Howellsbe6e6702016-04-04 14:00:32 +0100786
787/*
David Howells17926a72007-04-26 15:48:28 -0700788 * debug tracing
789 */
Eric Dumazet95c96172012-04-15 05:58:06 +0000790extern unsigned int rxrpc_debug;
David Howells17926a72007-04-26 15:48:28 -0700791
792#define dbgprintk(FMT,...) \
Sven Schnelle9f389f42008-04-03 10:45:30 +0100793 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -0700794
Harvey Harrison0dc47872008-03-05 20:47:47 -0800795#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
796#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -0700797#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
798#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
799#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
800
801
802#if defined(__KDEBUG)
803#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
804#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
805#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
806#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
807#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
808
809#elif defined(CONFIG_AF_RXRPC_DEBUG)
810#define RXRPC_DEBUG_KENTER 0x01
811#define RXRPC_DEBUG_KLEAVE 0x02
812#define RXRPC_DEBUG_KDEBUG 0x04
813#define RXRPC_DEBUG_KPROTO 0x08
814#define RXRPC_DEBUG_KNET 0x10
815
816#define _enter(FMT,...) \
817do { \
818 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
819 kenter(FMT,##__VA_ARGS__); \
820} while (0)
821
822#define _leave(FMT,...) \
823do { \
824 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
825 kleave(FMT,##__VA_ARGS__); \
826} while (0)
827
828#define _debug(FMT,...) \
829do { \
830 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
831 kdebug(FMT,##__VA_ARGS__); \
832} while (0)
833
834#define _proto(FMT,...) \
835do { \
836 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
837 kproto(FMT,##__VA_ARGS__); \
838} while (0)
839
840#define _net(FMT,...) \
841do { \
842 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
843 knet(FMT,##__VA_ARGS__); \
844} while (0)
845
846#else
David Howells12fdff32010-08-12 16:54:57 +0100847#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
848#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
849#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
850#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
851#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -0700852#endif
853
854/*
855 * debug assertion checking
856 */
857#if 1 // defined(__KDEBUGALL)
858
859#define ASSERT(X) \
860do { \
861 if (unlikely(!(X))) { \
Joe Perches9b6d5392016-06-02 12:08:52 -0700862 pr_err("Assertion failed\n"); \
David Howells17926a72007-04-26 15:48:28 -0700863 BUG(); \
864 } \
David Howellsb4f13422016-03-04 15:56:19 +0000865} while (0)
David Howells17926a72007-04-26 15:48:28 -0700866
867#define ASSERTCMP(X, OP, Y) \
868do { \
Joe Perches9b6d5392016-06-02 12:08:52 -0700869 unsigned long _x = (unsigned long)(X); \
870 unsigned long _y = (unsigned long)(Y); \
871 if (unlikely(!(_x OP _y))) { \
872 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
873 _x, _x, #OP, _y, _y); \
David Howells17926a72007-04-26 15:48:28 -0700874 BUG(); \
875 } \
David Howellsb4f13422016-03-04 15:56:19 +0000876} while (0)
David Howells17926a72007-04-26 15:48:28 -0700877
878#define ASSERTIF(C, X) \
879do { \
880 if (unlikely((C) && !(X))) { \
Joe Perches9b6d5392016-06-02 12:08:52 -0700881 pr_err("Assertion failed\n"); \
David Howells17926a72007-04-26 15:48:28 -0700882 BUG(); \
883 } \
David Howellsb4f13422016-03-04 15:56:19 +0000884} while (0)
David Howells17926a72007-04-26 15:48:28 -0700885
886#define ASSERTIFCMP(C, X, OP, Y) \
887do { \
Joe Perches9b6d5392016-06-02 12:08:52 -0700888 unsigned long _x = (unsigned long)(X); \
889 unsigned long _y = (unsigned long)(Y); \
890 if (unlikely((C) && !(_x OP _y))) { \
891 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
892 _x, _x, #OP, _y, _y); \
David Howells17926a72007-04-26 15:48:28 -0700893 BUG(); \
894 } \
David Howellsb4f13422016-03-04 15:56:19 +0000895} while (0)
David Howells17926a72007-04-26 15:48:28 -0700896
897#else
898
899#define ASSERT(X) \
900do { \
David Howellsb4f13422016-03-04 15:56:19 +0000901} while (0)
David Howells17926a72007-04-26 15:48:28 -0700902
903#define ASSERTCMP(X, OP, Y) \
904do { \
David Howellsb4f13422016-03-04 15:56:19 +0000905} while (0)
David Howells17926a72007-04-26 15:48:28 -0700906
907#define ASSERTIF(C, X) \
908do { \
David Howellsb4f13422016-03-04 15:56:19 +0000909} while (0)
David Howells17926a72007-04-26 15:48:28 -0700910
911#define ASSERTIFCMP(C, X, OP, Y) \
912do { \
David Howellsb4f13422016-03-04 15:56:19 +0000913} while (0)
David Howells17926a72007-04-26 15:48:28 -0700914
915#endif /* __KDEBUGALL */
916
David Howells17926a72007-04-26 15:48:28 -0700917
David Howells17926a72007-04-26 15:48:28 -0700918#define rxrpc_get_call(CALL) \
919do { \
920 CHECK_SLAB_OKAY(&(CALL)->usage); \
921 if (atomic_inc_return(&(CALL)->usage) == 1) \
922 BUG(); \
David Howellsb4f13422016-03-04 15:56:19 +0000923} while (0)
David Howells17926a72007-04-26 15:48:28 -0700924
925#define rxrpc_put_call(CALL) \
926do { \
927 __rxrpc_put_call(CALL); \
David Howellsb4f13422016-03-04 15:56:19 +0000928} while (0)