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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 Howells2baec2c2017-05-24 17:02:32 +010014#include <net/net_namespace.h>
15#include <net/netns/generic.h>
David Howellse0e4d822016-04-07 17:23:58 +010016#include <net/sock.h>
David Howellsbe6e6702016-04-04 14:00:32 +010017#include <net/af_rxrpc.h>
David Howellsddc6c702017-07-21 10:07:10 +010018#include "protocol.h"
David Howells17926a72007-04-26 15:48:28 -070019
20#if 0
21#define CHECK_SLAB_OKAY(X) \
22 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
23 (POISON_FREE << 8 | POISON_FREE))
24#else
David Howellsb4f13422016-03-04 15:56:19 +000025#define CHECK_SLAB_OKAY(X) do {} while (0)
David Howells17926a72007-04-26 15:48:28 -070026#endif
27
David Howells17926a72007-04-26 15:48:28 -070028#define FCRYPT_BSIZE 8
29struct rxrpc_crypt {
30 union {
31 u8 x[FCRYPT_BSIZE];
Al Viro91e916c2008-03-29 03:08:38 +000032 __be32 n[2];
David Howells17926a72007-04-26 15:48:28 -070033 };
34} __attribute__((aligned(8)));
35
David Howells651350d2007-04-26 15:50:17 -070036#define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
37#define rxrpc_queue_delayed_work(WS,D) \
38 queue_delayed_work(rxrpc_workqueue, (WS), (D))
39
David Howellscc8feb82016-04-04 14:00:37 +010040struct rxrpc_connection;
41
David Howells17926a72007-04-26 15:48:28 -070042/*
David Howellsd0016482016-08-30 20:42:14 +010043 * Mark applied to socket buffers.
44 */
45enum 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 Howells17926a72007-04-26 15:48:28 -070057 * sk_state for RxRPC sockets
58 */
59enum {
David Howells2341e072016-06-09 23:02:51 +010060 RXRPC_UNBOUND = 0,
61 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
David Howells17926a72007-04-26 15:48:28 -070062 RXRPC_CLIENT_BOUND, /* client local address bound */
David Howells17926a72007-04-26 15:48:28 -070063 RXRPC_SERVER_BOUND, /* server local address bound */
David Howells28036f42017-06-05 14:30:49 +010064 RXRPC_SERVER_BOUND2, /* second server local address bound */
David Howells17926a72007-04-26 15:48:28 -070065 RXRPC_SERVER_LISTENING, /* server listening for connections */
David Howells210f0352017-01-05 10:38:36 +000066 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
David Howells17926a72007-04-26 15:48:28 -070067 RXRPC_CLOSE, /* socket is being closed */
68};
69
70/*
David Howells2baec2c2017-05-24 17:02:32 +010071 * Per-network namespace data.
72 */
73struct rxrpc_net {
74 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
75 u32 epoch; /* Local epoch for detecting local-end reset */
76 struct list_head calls; /* List of calls active in this namespace */
77 rwlock_t call_lock; /* Lock for ->calls */
David Howellsd3be4d22018-03-30 21:05:23 +010078 atomic_t nr_calls; /* Count of allocated calls */
David Howells2baec2c2017-05-24 17:02:32 +010079
David Howells31f5f9a162018-03-30 21:05:33 +010080 atomic_t nr_conns;
David Howells2baec2c2017-05-24 17:02:32 +010081 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
82 struct list_head service_conns; /* Service conns in this namespace */
83 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
David Howells3d18cbb2017-11-24 10:18:42 +000084 struct work_struct service_conn_reaper;
85 struct timer_list service_conn_reap_timer;
David Howells2baec2c2017-05-24 17:02:32 +010086
87 unsigned int nr_client_conns;
88 unsigned int nr_active_client_conns;
89 bool kill_all_client_conns;
David Howellsf859ab62017-11-24 10:18:42 +000090 bool live;
David Howells2baec2c2017-05-24 17:02:32 +010091 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
92 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
93 struct list_head waiting_client_conns;
94 struct list_head active_client_conns;
95 struct list_head idle_client_conns;
David Howells3d18cbb2017-11-24 10:18:42 +000096 struct work_struct client_conn_reaper;
97 struct timer_list client_conn_reap_timer;
David Howells2baec2c2017-05-24 17:02:32 +010098
99 struct list_head local_endpoints;
100 struct mutex local_mutex; /* Lock for ->local_endpoints */
101
David Howells2baec2c2017-05-24 17:02:32 +0100102 DECLARE_HASHTABLE (peer_hash, 10);
David Howellsace45be2018-03-30 21:04:43 +0100103 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
104
105#define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
106 u8 peer_keepalive_cursor;
David Howells330bdcf2018-08-08 11:30:02 +0100107 time64_t peer_keepalive_base;
108 struct list_head peer_keepalive[32];
109 struct list_head peer_keepalive_new;
David Howellsace45be2018-03-30 21:04:43 +0100110 struct timer_list peer_keepalive_timer;
111 struct work_struct peer_keepalive_work;
David Howells2baec2c2017-05-24 17:02:32 +0100112};
113
114/*
David Howells00e90712016-09-08 11:10:12 +0100115 * Service backlog preallocation.
116 *
117 * This contains circular buffers of preallocated peers, connections and calls
118 * for incoming service calls and their head and tail pointers. This allows
119 * calls to be set up in the data_ready handler, thereby avoiding the need to
120 * shuffle packets around so much.
121 */
122struct rxrpc_backlog {
123 unsigned short peer_backlog_head;
124 unsigned short peer_backlog_tail;
125 unsigned short conn_backlog_head;
126 unsigned short conn_backlog_tail;
127 unsigned short call_backlog_head;
128 unsigned short call_backlog_tail;
129#define RXRPC_BACKLOG_MAX 32
130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
133};
134
135/*
David Howells17926a72007-04-26 15:48:28 -0700136 * RxRPC socket definition
137 */
138struct rxrpc_sock {
139 /* WARNING: sk has to be the first member */
140 struct sock sk;
David Howellsd0016482016-08-30 20:42:14 +0100141 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
David Howells00e90712016-09-08 11:10:12 +0100142 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
David Howells17926a72007-04-26 15:48:28 -0700143 struct rxrpc_local *local; /* local endpoint */
David Howells00e90712016-09-08 11:10:12 +0100144 struct rxrpc_backlog *backlog; /* Preallocation for services */
David Howells248f2192016-09-08 11:10:12 +0100145 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
146 struct list_head sock_calls; /* List of calls owned by this socket */
147 struct list_head to_be_accepted; /* calls awaiting acceptance */
148 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
149 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
David Howells17926a72007-04-26 15:48:28 -0700150 struct key *key; /* security for this socket */
151 struct key *securities; /* list of server security descriptors */
David Howells00e90712016-09-08 11:10:12 +0100152 struct rb_root calls; /* User ID -> call mapping */
David Howells17926a72007-04-26 15:48:28 -0700153 unsigned long flags;
David Howells2341e072016-06-09 23:02:51 +0100154#define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
David Howells17926a72007-04-26 15:48:28 -0700155 rwlock_t call_lock; /* lock for calls */
156 u32 min_sec_level; /* minimum security level */
157#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
David Howellscc8feb82016-04-04 14:00:37 +0100158 bool exclusive; /* Exclusive connection for a client socket */
David Howells28036f42017-06-05 14:30:49 +0100159 u16 second_service; /* Additional service bound to the endpoint */
David Howells47229742017-06-05 14:30:49 +0100160 struct {
161 /* Service upgrade information */
162 u16 from; /* Service ID to upgrade (if not 0) */
163 u16 to; /* service ID to upgrade to */
164 } service_upgrade;
David Howellscc8feb82016-04-04 14:00:37 +0100165 sa_family_t family; /* Protocol family created with */
David Howells47229742017-06-05 14:30:49 +0100166 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
David Howells2341e072016-06-09 23:02:51 +0100167 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
David Howells17926a72007-04-26 15:48:28 -0700168};
169
170#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
171
172/*
David Howells0d12f8a2016-03-04 15:53:46 +0000173 * CPU-byteorder normalised Rx packet header.
174 */
175struct rxrpc_host_header {
176 u32 epoch; /* client boot timestamp */
177 u32 cid; /* connection and channel ID */
178 u32 callNumber; /* call ID (0 for connection-level packets) */
179 u32 seq; /* sequence number of pkt in call stream */
180 u32 serial; /* serial number of pkt sent to network */
181 u8 type; /* packet type */
182 u8 flags; /* packet flags */
183 u8 userStatus; /* app-layer defined status */
184 u8 securityIndex; /* security protocol ID */
185 union {
186 u16 _rsvd; /* reserved */
187 u16 cksum; /* kerberos security checksum */
188 };
189 u16 serviceId; /* service ID */
190} __packed;
191
192/*
David Howells17926a72007-04-26 15:48:28 -0700193 * RxRPC socket buffer private variables
194 * - max 48 bytes (struct sk_buff::cb)
195 */
196struct rxrpc_skb_priv {
David Howells248f2192016-09-08 11:10:12 +0100197 union {
David Howells50235c42016-09-22 00:29:31 +0100198 u8 nr_jumbo; /* Number of jumbo subpackets */
David Howells248f2192016-09-08 11:10:12 +0100199 };
David Howells17926a72007-04-26 15:48:28 -0700200 union {
David Howells17926a72007-04-26 15:48:28 -0700201 int remain; /* amount of space remaining for next write */
David Howells17926a72007-04-26 15:48:28 -0700202 };
203
David Howells0d12f8a2016-03-04 15:53:46 +0000204 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
David Howells17926a72007-04-26 15:48:28 -0700205};
206
207#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
208
David Howells17926a72007-04-26 15:48:28 -0700209/*
210 * RxRPC security module interface
211 */
212struct rxrpc_security {
David Howells17926a72007-04-26 15:48:28 -0700213 const char *name; /* name of this service */
214 u8 security_index; /* security type provided */
215
David Howells648af7f2016-04-07 17:23:51 +0100216 /* Initialise a security service */
217 int (*init)(void);
218
219 /* Clean up a security service */
220 void (*exit)(void);
221
David Howells17926a72007-04-26 15:48:28 -0700222 /* initialise a connection's security */
223 int (*init_connection_security)(struct rxrpc_connection *);
224
225 /* prime a connection's packet security */
Herbert Xua2636292016-06-26 14:55:24 -0700226 int (*prime_packet_security)(struct rxrpc_connection *);
David Howells17926a72007-04-26 15:48:28 -0700227
228 /* impose security on a packet */
Herbert Xua2636292016-06-26 14:55:24 -0700229 int (*secure_packet)(struct rxrpc_call *,
David Howells17926a72007-04-26 15:48:28 -0700230 struct sk_buff *,
231 size_t,
232 void *);
233
234 /* verify the security on a received packet */
David Howells5a429762016-09-06 22:19:51 +0100235 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
David Howells248f2192016-09-08 11:10:12 +0100236 unsigned int, unsigned int, rxrpc_seq_t, u16);
237
238 /* Locate the data in a received packet that has been verified. */
239 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
240 unsigned int *, unsigned int *);
David Howells17926a72007-04-26 15:48:28 -0700241
242 /* issue a challenge */
243 int (*issue_challenge)(struct rxrpc_connection *);
244
245 /* respond to a challenge */
246 int (*respond_to_challenge)(struct rxrpc_connection *,
247 struct sk_buff *,
248 u32 *);
249
250 /* verify a response */
251 int (*verify_response)(struct rxrpc_connection *,
252 struct sk_buff *,
253 u32 *);
254
255 /* clear connection security */
256 void (*clear)(struct rxrpc_connection *);
257};
258
259/*
David Howells4f95dd72016-04-04 14:00:35 +0100260 * RxRPC local transport endpoint description
261 * - owned by a single AF_RXRPC socket
262 * - pointed to by transport socket struct sk_user_data
David Howells17926a72007-04-26 15:48:28 -0700263 */
264struct rxrpc_local {
David Howells4f95dd72016-04-04 14:00:35 +0100265 struct rcu_head rcu;
266 atomic_t usage;
David Howells2baec2c2017-05-24 17:02:32 +0100267 struct rxrpc_net *rxnet; /* The network ns in which this resides */
David Howells4f95dd72016-04-04 14:00:35 +0100268 struct list_head link;
David Howells17926a72007-04-26 15:48:28 -0700269 struct socket *socket; /* my UDP socket */
David Howells4f95dd72016-04-04 14:00:35 +0100270 struct work_struct processor;
David Howells1e9e5c92016-09-29 22:37:15 +0100271 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
David Howells17926a72007-04-26 15:48:28 -0700272 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
David Howells17926a72007-04-26 15:48:28 -0700273 struct sk_buff_head reject_queue; /* packets awaiting rejection */
David Howells44ba0692015-04-01 16:31:26 +0100274 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
David Howells999b69f2016-06-17 15:42:35 +0100275 struct rb_root client_conns; /* Client connections by socket params */
276 spinlock_t client_conns_lock; /* Lock for client_conns */
David Howells17926a72007-04-26 15:48:28 -0700277 spinlock_t lock; /* access lock */
278 rwlock_t services_lock; /* lock for services list */
David Howells17926a72007-04-26 15:48:28 -0700279 int debug_id; /* debug ID for printks */
David Howells4f95dd72016-04-04 14:00:35 +0100280 bool dead;
David Howellsf859ab62017-11-24 10:18:42 +0000281 bool service_closed; /* Service socket closed */
David Howells17926a72007-04-26 15:48:28 -0700282 struct sockaddr_rxrpc srx; /* local address */
283};
284
285/*
286 * RxRPC remote transport endpoint definition
David Howellsbe6e6702016-04-04 14:00:32 +0100287 * - matched by local endpoint, remote port, address and protocol type
David Howells17926a72007-04-26 15:48:28 -0700288 */
289struct rxrpc_peer {
David Howellsbe6e6702016-04-04 14:00:32 +0100290 struct rcu_head rcu; /* This must be first */
291 atomic_t usage;
292 unsigned long hash_key;
293 struct hlist_node hash_link;
294 struct rxrpc_local *local;
David Howellsf66d7492016-04-04 14:00:34 +0100295 struct hlist_head error_targets; /* targets for net error distribution */
296 struct work_struct error_distributor;
David Howellsaa390bb2016-06-17 10:06:56 +0100297 struct rb_root service_conns; /* Service connections */
David Howells330bdcf2018-08-08 11:30:02 +0100298 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
David Howellsace45be2018-03-30 21:04:43 +0100299 time64_t last_tx_at; /* Last time packet sent here */
David Howells8496af52016-07-01 07:51:50 +0100300 seqlock_t service_conn_lock;
David Howells17926a72007-04-26 15:48:28 -0700301 spinlock_t lock; /* access lock */
Eric Dumazet95c96172012-04-15 05:58:06 +0000302 unsigned int if_mtu; /* interface MTU for this peer */
303 unsigned int mtu; /* network MTU for this peer */
304 unsigned int maxdata; /* data size (MTU - hdrsize) */
David Howells17926a72007-04-26 15:48:28 -0700305 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
306 int debug_id; /* debug ID for printks */
David Howellsf66d7492016-04-04 14:00:34 +0100307 int error_report; /* Net (+0) or local (+1000000) to distribute */
308#define RXRPC_LOCAL_ERROR_OFFSET 1000000
David Howells17926a72007-04-26 15:48:28 -0700309 struct sockaddr_rxrpc srx; /* remote address */
310
311 /* calculated RTT cache */
312#define RXRPC_RTT_CACHE_SIZE 32
David Howells0d4b1032016-09-22 00:29:31 +0100313 ktime_t rtt_last_req; /* Time of last RTT request */
David Howellscf1a6472016-09-22 00:41:53 +0100314 u64 rtt; /* Current RTT estimate (in nS) */
315 u64 rtt_sum; /* Sum of cache contents */
316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
317 u8 rtt_cursor; /* next entry at which to insert */
318 u8 rtt_usage; /* amount of cache actually used */
David Howellsf7aec122017-06-14 17:56:50 +0100319
320 u8 cong_cwnd; /* Congestion window size */
David Howells17926a72007-04-26 15:48:28 -0700321};
322
323/*
David Howells19ffa012016-04-04 14:00:36 +0100324 * Keys for matching a connection.
325 */
326struct rxrpc_conn_proto {
David Howellse8d70ce2016-06-30 12:16:21 +0100327 union {
328 struct {
329 u32 epoch; /* epoch of this connection */
330 u32 cid; /* connection ID */
331 };
332 u64 index_key;
David Howells19ffa012016-04-04 14:00:36 +0100333 };
334};
335
336struct rxrpc_conn_parameters {
337 struct rxrpc_local *local; /* Representation of local endpoint */
338 struct rxrpc_peer *peer; /* Remote endpoint */
339 struct key *key; /* Security details */
340 bool exclusive; /* T if conn is exclusive */
David Howells4e255722017-06-05 14:30:49 +0100341 bool upgrade; /* T if service ID can be upgraded */
David Howells19ffa012016-04-04 14:00:36 +0100342 u16 service_id; /* Service ID for this connection */
343 u32 security_level; /* Security level selected */
344};
345
346/*
David Howellsbba304d2016-06-27 10:32:02 +0100347 * Bits in the connection flags.
348 */
349enum rxrpc_conn_flag {
350 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
David Howells001c1122016-06-30 10:45:22 +0100351 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
352 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
David Howells45025bc2016-08-24 07:30:52 +0100353 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
355 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
David Howells4e255722017-06-05 14:30:49 +0100356 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
David Howells3136ef42017-11-24 10:18:41 +0000357 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
358 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
359 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
360 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
David Howellsbba304d2016-06-27 10:32:02 +0100361};
362
David Howells3136ef42017-11-24 10:18:41 +0000363#define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
364 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
365 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
366 (1UL << RXRPC_CONN_FINAL_ACK_3))
367
David Howellsbba304d2016-06-27 10:32:02 +0100368/*
369 * Events that can be raised upon a connection.
370 */
371enum rxrpc_conn_event {
372 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
373};
374
375/*
David Howells45025bc2016-08-24 07:30:52 +0100376 * The connection cache state.
377 */
378enum rxrpc_conn_cache_state {
379 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
380 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
381 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
David Howells4e255722017-06-05 14:30:49 +0100382 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */
David Howells45025bc2016-08-24 07:30:52 +0100383 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
384 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
David Howells363deea2016-09-17 10:49:14 +0100385 RXRPC_CONN__NR_CACHE_STATES
David Howells45025bc2016-08-24 07:30:52 +0100386};
387
388/*
David Howellsbba304d2016-06-27 10:32:02 +0100389 * The connection protocol state.
390 */
391enum rxrpc_conn_proto_state {
392 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
393 RXRPC_CONN_CLIENT, /* Client connection */
David Howells00e90712016-09-08 11:10:12 +0100394 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
David Howellsbba304d2016-06-27 10:32:02 +0100395 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
396 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
397 RXRPC_CONN_SERVICE, /* Service secured connection */
398 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
399 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
David Howellsbba304d2016-06-27 10:32:02 +0100400 RXRPC_CONN__NR_STATES
401};
402
403/*
David Howells17926a72007-04-26 15:48:28 -0700404 * RxRPC connection definition
David Howellsaa390bb2016-06-17 10:06:56 +0100405 * - matched by { local, peer, epoch, conn_id, direction }
David Howells17926a72007-04-26 15:48:28 -0700406 * - each connection can only handle four simultaneous calls
407 */
408struct rxrpc_connection {
David Howells19ffa012016-04-04 14:00:36 +0100409 struct rxrpc_conn_proto proto;
410 struct rxrpc_conn_parameters params;
411
David Howells45025bc2016-08-24 07:30:52 +0100412 atomic_t usage;
413 struct rcu_head rcu;
414 struct list_head cache_link;
David Howellsa1399f82016-06-27 14:39:44 +0100415
David Howells45025bc2016-08-24 07:30:52 +0100416 spinlock_t channel_lock;
417 unsigned char active_chans; /* Mask of active channels */
418#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
419 struct list_head waiting_calls; /* Calls waiting for channels */
David Howellsa1399f82016-06-27 14:39:44 +0100420 struct rxrpc_channel {
David Howells3136ef42017-11-24 10:18:41 +0000421 unsigned long final_ack_at; /* Time at which to issue final ACK */
David Howellsa1399f82016-06-27 14:39:44 +0100422 struct rxrpc_call __rcu *call; /* Active call */
423 u32 call_id; /* ID of current call */
424 u32 call_counter; /* Call ID counter */
425 u32 last_call; /* ID of last call */
David Howells18bfeba2016-08-23 15:27:25 +0100426 u8 last_type; /* Type of last packet */
David Howells18bfeba2016-08-23 15:27:25 +0100427 union {
428 u32 last_seq;
429 u32 last_abort;
430 };
David Howellsa1399f82016-06-27 14:39:44 +0100431 } channels[RXRPC_MAXCALLS];
David Howells999b69f2016-06-17 15:42:35 +0100432
David Howells3136ef42017-11-24 10:18:41 +0000433 struct timer_list timer; /* Conn event timer */
David Howells17926a72007-04-26 15:48:28 -0700434 struct work_struct processor; /* connection event processor */
David Howells999b69f2016-06-17 15:42:35 +0100435 union {
436 struct rb_node client_node; /* Node in local->client_conns */
David Howellsaa390bb2016-06-17 10:06:56 +0100437 struct rb_node service_node; /* Node in peer->service_conns */
David Howells999b69f2016-06-17 15:42:35 +0100438 };
David Howells4d028b22016-08-24 07:30:52 +0100439 struct list_head proc_link; /* link in procfs list */
David Howells17926a72007-04-26 15:48:28 -0700440 struct list_head link; /* link in master connection list */
David Howells17926a72007-04-26 15:48:28 -0700441 struct sk_buff_head rx_queue; /* received conn-level packets */
David Howells648af7f2016-04-07 17:23:51 +0100442 const struct rxrpc_security *security; /* applied security module */
David Howells17926a72007-04-26 15:48:28 -0700443 struct key *server_key; /* security for this service */
Herbert Xu1afe5932016-01-24 21:19:01 +0800444 struct crypto_skcipher *cipher; /* encryption handle */
David Howells17926a72007-04-26 15:48:28 -0700445 struct rxrpc_crypt csum_iv; /* packet checksum base */
David Howells4a3388c2016-04-04 14:00:37 +0100446 unsigned long flags;
David Howells17926a72007-04-26 15:48:28 -0700447 unsigned long events;
David Howellsf51b4482016-08-23 15:27:24 +0100448 unsigned long idle_timestamp; /* Time at which last became idle */
David Howells17926a72007-04-26 15:48:28 -0700449 spinlock_t state_lock; /* state-change lock */
David Howellscf132582016-09-08 11:10:11 +0100450 enum rxrpc_conn_cache_state cache_state;
451 enum rxrpc_conn_proto_state state; /* current state of connection */
David Howellsdc44b3a2016-04-07 17:23:30 +0100452 u32 local_abort; /* local abort code */
453 u32 remote_abort; /* remote abort code */
David Howells17926a72007-04-26 15:48:28 -0700454 int debug_id; /* debug ID for printks */
David Howells17926a72007-04-26 15:48:28 -0700455 atomic_t serial; /* packet serial number counter */
David Howells563ea7d2016-08-23 15:27:25 +0100456 unsigned int hi_serial; /* highest serial number received */
David Howells17926a72007-04-26 15:48:28 -0700457 u32 security_nonce; /* response re-use preventer */
David Howells68d6d1a2017-06-05 14:30:49 +0100458 u16 service_id; /* Service ID, possibly upgraded */
David Howells5a924b82016-09-22 00:29:31 +0100459 u8 size_align; /* data size alignment (for security) */
460 u8 security_size; /* security header size */
David Howells17926a72007-04-26 15:48:28 -0700461 u8 security_ix; /* security type */
David Howells17926a72007-04-26 15:48:28 -0700462 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
463};
464
465/*
David Howells5b8848d2016-03-04 15:53:46 +0000466 * Flags in call->flags.
467 */
468enum rxrpc_call_flag {
469 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
David Howells5b8848d2016-03-04 15:53:46 +0000470 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
David Howellsdabe5a72016-08-23 15:27:24 +0100471 RXRPC_CALL_IS_SERVICE, /* Call is service call */
David Howells45025bc2016-08-24 07:30:52 +0100472 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
David Howells248f2192016-09-08 11:10:12 +0100473 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
474 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
David Howellsc038a582017-08-29 10:19:01 +0100475 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */
David Howellsa5af7e12016-10-06 08:11:49 +0100476 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
David Howells8e831342016-09-22 00:29:31 +0100477 RXRPC_CALL_PINGING, /* Ping in process */
David Howells57494342016-09-24 18:05:27 +0100478 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
David Howellsc54e43d2018-05-10 23:26:00 +0100479 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
David Howells1a025022018-06-03 02:17:39 +0100480 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
David Howells5b8848d2016-03-04 15:53:46 +0000481};
482
483/*
484 * Events that can be raised on a call.
485 */
486enum rxrpc_call_event {
David Howells4c198ad2016-03-04 15:53:46 +0000487 RXRPC_CALL_EV_ACK, /* need to generate ACK */
David Howells4c198ad2016-03-04 15:53:46 +0000488 RXRPC_CALL_EV_ABORT, /* need to generate abort */
David Howells4c198ad2016-03-04 15:53:46 +0000489 RXRPC_CALL_EV_RESEND, /* Tx resend required */
David Howellsa5af7e12016-10-06 08:11:49 +0100490 RXRPC_CALL_EV_PING, /* Ping send required */
David Howellsa158bdd2017-11-24 10:18:41 +0000491 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
David Howellsbd1fdf82017-11-24 10:18:42 +0000492 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
David Howells5b8848d2016-03-04 15:53:46 +0000493};
494
495/*
496 * The states that a call can be in.
497 */
498enum rxrpc_call_state {
David Howells999b69f2016-06-17 15:42:35 +0100499 RXRPC_CALL_UNINITIALISED,
500 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
David Howells5b8848d2016-03-04 15:53:46 +0000501 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
502 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
503 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
David Howells00e90712016-09-08 11:10:12 +0100504 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
David Howells5b8848d2016-03-04 15:53:46 +0000505 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
506 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
507 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
508 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
509 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
510 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
David Howellsf5c17aa2016-08-30 09:49:28 +0100511 RXRPC_CALL_COMPLETE, /* - call complete */
David Howellsf5c17aa2016-08-30 09:49:28 +0100512 NR__RXRPC_CALL_STATES
513};
514
515/*
David Howells57494342016-09-24 18:05:27 +0100516 * Call Tx congestion management modes.
517 */
518enum rxrpc_congest_mode {
519 RXRPC_CALL_SLOW_START,
520 RXRPC_CALL_CONGEST_AVOIDANCE,
521 RXRPC_CALL_PACKET_LOSS,
522 RXRPC_CALL_FAST_RETRANSMIT,
523 NR__RXRPC_CONGEST_MODES
524};
525
526/*
David Howells17926a72007-04-26 15:48:28 -0700527 * RxRPC call definition
528 * - matched by { connection, call_id }
529 */
530struct rxrpc_call {
David Howellsdee46362016-06-27 17:11:19 +0100531 struct rcu_head rcu;
David Howells17926a72007-04-26 15:48:28 -0700532 struct rxrpc_connection *conn; /* connection carrying call */
David Howellsdf5d8bf2016-08-24 14:31:43 +0100533 struct rxrpc_peer *peer; /* Peer record for remote address */
David Howells8d94aa32016-09-07 09:19:31 +0100534 struct rxrpc_sock __rcu *socket; /* socket responsible */
David Howellsd3be4d22018-03-30 21:05:23 +0100535 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
David Howells540b1c42017-02-27 15:43:06 +0000536 struct mutex user_mutex; /* User access mutex */
David Howellsa158bdd2017-11-24 10:18:41 +0000537 unsigned long ack_at; /* When deferred ACK needs to happen */
David Howellsbd1fdf82017-11-24 10:18:42 +0000538 unsigned long ack_lost_at; /* When ACK is figured as lost */
David Howellsa158bdd2017-11-24 10:18:41 +0000539 unsigned long resend_at; /* When next resend needs to happen */
540 unsigned long ping_at; /* When next to send a ping */
David Howells415f44e2017-11-24 10:18:42 +0000541 unsigned long keepalive_at; /* When next to send a keepalive ping */
David Howellsa158bdd2017-11-24 10:18:41 +0000542 unsigned long expect_rx_by; /* When we expect to get a packet by */
543 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
544 unsigned long expect_term_by; /* When we expect call termination by */
545 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
546 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
David Howells248f2192016-09-08 11:10:12 +0100547 struct timer_list timer; /* Combined event timer */
548 struct work_struct processor; /* Event processor */
David Howellsd0016482016-08-30 20:42:14 +0100549 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
David Howells17926a72007-04-26 15:48:28 -0700550 struct list_head link; /* link in master call list */
David Howells45025bc2016-08-24 07:30:52 +0100551 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
David Howellsf66d7492016-04-04 14:00:34 +0100552 struct hlist_node error_link; /* link in error distribution list */
David Howells248f2192016-09-08 11:10:12 +0100553 struct list_head accept_link; /* Link in rx->acceptq */
554 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
555 struct list_head sock_link; /* Link in rx->sock_calls */
556 struct rb_node sock_node; /* Node in rx->calls */
David Howells17926a72007-04-26 15:48:28 -0700557 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
David Howells45025bc2016-08-24 07:30:52 +0100558 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
David Howellse754eba2017-06-07 12:40:03 +0100559 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
Herbert Xua2636292016-06-26 14:55:24 -0700560 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
David Howells17926a72007-04-26 15:48:28 -0700561 unsigned long user_call_ID; /* user-defined call ID */
David Howells17926a72007-04-26 15:48:28 -0700562 unsigned long flags;
David Howells17926a72007-04-26 15:48:28 -0700563 unsigned long events;
David Howells17926a72007-04-26 15:48:28 -0700564 spinlock_t lock;
David Howells20acbd92017-11-02 15:06:08 +0000565 spinlock_t notify_lock; /* Kernel notification lock */
David Howells17926a72007-04-26 15:48:28 -0700566 rwlock_t state_lock; /* lock for state transition */
David Howellsf5c17aa2016-08-30 09:49:28 +0100567 u32 abort_code; /* Local/remote abort code */
568 int error; /* Local error incurred */
David Howellscf132582016-09-08 11:10:11 +0100569 enum rxrpc_call_state state; /* current state of call */
570 enum rxrpc_call_completion completion; /* Call completion condition */
David Howells17926a72007-04-26 15:48:28 -0700571 atomic_t usage;
David Howellsdabe5a72016-08-23 15:27:24 +0100572 u16 service_id; /* service ID */
David Howells278ac0c2016-09-07 15:19:25 +0100573 u8 security_ix; /* Security type */
David Howellsdabe5a72016-08-23 15:27:24 +0100574 u32 call_id; /* call ID on connection */
575 u32 cid; /* connection ID plus channel index */
576 int debug_id; /* debug ID for printks */
David Howells8e831342016-09-22 00:29:31 +0100577 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
578 unsigned short rx_pkt_len; /* Current recvmsg packet len */
David Howells17926a72007-04-26 15:48:28 -0700579
David Howells248f2192016-09-08 11:10:12 +0100580 /* Rx/Tx circular buffer, depending on phase.
581 *
582 * In the Rx phase, packets are annotated with 0 or the number of the
583 * segment of a jumbo packet each buffer refers to. There can be up to
584 * 47 segments in a maximum-size UDP packet.
585 *
586 * In the Tx phase, packets are annotated with which buffers have been
587 * acked.
588 */
589#define RXRPC_RXTX_BUFF_SIZE 64
590#define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
David Howells75e42122016-09-13 22:36:22 +0100591#define RXRPC_INIT_RX_WINDOW_SIZE 32
David Howells248f2192016-09-08 11:10:12 +0100592 struct sk_buff **rxtx_buffer;
593 u8 *rxtx_annotations;
594#define RXRPC_TX_ANNO_ACK 0
595#define RXRPC_TX_ANNO_UNACK 1
596#define RXRPC_TX_ANNO_NAK 2
597#define RXRPC_TX_ANNO_RETRANS 3
David Howellsf07373e2016-09-22 00:29:32 +0100598#define RXRPC_TX_ANNO_MASK 0x03
David Howells70790dbe2016-09-23 12:39:22 +0100599#define RXRPC_TX_ANNO_LAST 0x04
600#define RXRPC_TX_ANNO_RESENT 0x08
601
David Howells248f2192016-09-08 11:10:12 +0100602#define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
603#define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
604#define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
605 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
606 * not hard-ACK'd packet follows this.
David Howells17926a72007-04-26 15:48:28 -0700607 */
David Howells248f2192016-09-08 11:10:12 +0100608 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
David Howells57494342016-09-24 18:05:27 +0100609
610 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
611 * is fixed, we keep these numbers in terms of segments (ie. DATA
612 * packets) rather than bytes.
613 */
614#define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
615 u8 cong_cwnd; /* Congestion window size */
616 u8 cong_extra; /* Extra to send for congestion management */
617 u8 cong_ssthresh; /* Slow-start threshold */
618 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
619 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
620 u8 cong_cumul_acks; /* Cumulative ACK count */
621 ktime_t cong_tstamp; /* Last time cwnd was changed */
622
David Howells248f2192016-09-08 11:10:12 +0100623 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
624 * consumed packet follows this.
625 */
626 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
627 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
David Howells1a025022018-06-03 02:17:39 +0100628 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
David Howells248f2192016-09-08 11:10:12 +0100629 u8 rx_winsize; /* Size of Rx window */
630 u8 tx_winsize; /* Maximum size of Tx window */
David Howells71f3ca42016-09-17 10:49:14 +0100631 bool tx_phase; /* T if transmission phase, F if receive phase */
David Howells75e42122016-09-13 22:36:22 +0100632 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
David Howells17926a72007-04-26 15:48:28 -0700633
634 /* receive-phase ACK management */
David Howells4e36a952009-09-16 00:01:13 -0700635 u8 ackr_reason; /* reason to ACK */
David Howells563ea7d2016-08-23 15:27:25 +0100636 u16 ackr_skew; /* skew on packet being ACK'd */
David Howells0d12f8a2016-03-04 15:53:46 +0000637 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
David Howells248f2192016-09-08 11:10:12 +0100638 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
David Howells805b21b2016-09-24 18:05:26 +0100639 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
640 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
David Howellsa5af7e12016-10-06 08:11:49 +0100641
642 /* ping management */
643 rxrpc_serial_t ping_serial; /* Last ping sent */
644 ktime_t ping_time; /* Time last ping sent */
David Howells17926a72007-04-26 15:48:28 -0700645
David Howells248f2192016-09-08 11:10:12 +0100646 /* transmission-phase ACK management */
David Howells57494342016-09-24 18:05:27 +0100647 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
David Howells248f2192016-09-08 11:10:12 +0100648 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
David Howells31a1b9892016-09-24 18:05:26 +0100649 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
David Howellsbd1fdf82017-11-24 10:18:42 +0000650 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
651 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
David Howells31a1b9892016-09-24 18:05:26 +0100652};
653
654/*
David Howells57494342016-09-24 18:05:27 +0100655 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
David Howells31a1b9892016-09-24 18:05:26 +0100656 */
657struct rxrpc_ack_summary {
658 u8 ack_reason;
659 u8 nr_acks; /* Number of ACKs in packet */
660 u8 nr_nacks; /* Number of NACKs in packet */
661 u8 nr_new_acks; /* Number of new ACKs in packet */
662 u8 nr_new_nacks; /* Number of new NACKs in packet */
663 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
664 bool new_low_nack; /* T if new low NACK found */
David Howells57494342016-09-24 18:05:27 +0100665 bool retrans_timeo; /* T if reTx due to timeout happened */
666 u8 flight_size; /* Number of unreceived transmissions */
667 /* Place to stash values for tracing */
668 enum rxrpc_congest_mode mode:8;
669 u8 cwnd;
670 u8 ssthresh;
671 u8 dup_acks;
672 u8 cumulative_acks;
David Howells17926a72007-04-26 15:48:28 -0700673};
674
David Howells48124172017-11-24 10:18:41 +0000675/*
676 * sendmsg() cmsg-specified parameters.
677 */
678enum rxrpc_command {
679 RXRPC_CMD_SEND_DATA, /* send data message */
680 RXRPC_CMD_SEND_ABORT, /* request abort generation */
681 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
682 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
683};
684
685struct rxrpc_call_params {
686 s64 tx_total_len; /* Total Tx data length (if send data) */
687 unsigned long user_call_ID; /* User's call ID */
688 struct {
689 u32 hard; /* Maximum lifetime (sec) */
690 u32 idle; /* Max time since last data packet (msec) */
691 u32 normal; /* Max time since last call packet (msec) */
692 } timeouts;
693 u8 nr_timeouts; /* Number of timeouts specified */
694};
695
696struct rxrpc_send_params {
697 struct rxrpc_call_params call;
698 u32 abort_code; /* Abort code to Tx (if abort) */
699 enum rxrpc_command command : 8; /* The command to implement */
700 bool exclusive; /* Shared or exclusive call */
701 bool upgrade; /* If the connection is upgradeable */
702};
703
David Howellsdf844fd2016-08-23 15:27:24 +0100704#include <trace/events/rxrpc.h>
705
David Howells17926a72007-04-26 15:48:28 -0700706/*
David Howells651350d2007-04-26 15:50:17 -0700707 * af_rxrpc.c
David Howells17926a72007-04-26 15:48:28 -0700708 */
David Howells71f3ca42016-09-17 10:49:14 +0100709extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
David Howells651350d2007-04-26 15:50:17 -0700710extern struct workqueue_struct *rxrpc_workqueue;
David Howells17926a72007-04-26 15:48:28 -0700711
712/*
David Howells0d81a512016-06-13 13:30:30 +0100713 * call_accept.c
David Howells17926a72007-04-26 15:48:28 -0700714 */
David Howells00e90712016-09-08 11:10:12 +0100715int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
716void rxrpc_discard_prealloc(struct rxrpc_sock *);
David Howells248f2192016-09-08 11:10:12 +0100717struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
718 struct rxrpc_connection *,
719 struct sk_buff *);
David Howells4f95dd72016-04-04 14:00:35 +0100720void rxrpc_accept_incoming_calls(struct rxrpc_local *);
David Howellsd0016482016-08-30 20:42:14 +0100721struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
722 rxrpc_notify_rx_t);
Joe Perchesc1b12032013-10-18 13:48:25 -0700723int rxrpc_reject_call(struct rxrpc_sock *);
David Howells17926a72007-04-26 15:48:28 -0700724
725/*
David Howells0d81a512016-06-13 13:30:30 +0100726 * call_event.c
David Howells17926a72007-04-26 15:48:28 -0700727 */
David Howells9c7ad432016-09-23 13:50:40 +0100728void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
729 enum rxrpc_propose_ack_trace);
Joe Perchesc1b12032013-10-18 13:48:25 -0700730void rxrpc_process_call(struct work_struct *);
David Howells17926a72007-04-26 15:48:28 -0700731
David Howellsa158bdd2017-11-24 10:18:41 +0000732static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
733 unsigned long expire_at,
734 unsigned long now,
735 enum rxrpc_timer_trace why)
736{
737 trace_rxrpc_timer(call, why, now);
738 timer_reduce(&call->timer, expire_at);
739}
740
David Howells17926a72007-04-26 15:48:28 -0700741/*
David Howells0d81a512016-06-13 13:30:30 +0100742 * call_object.c
David Howells17926a72007-04-26 15:48:28 -0700743 */
David Howellsf5c17aa2016-08-30 09:49:28 +0100744extern const char *const rxrpc_call_states[];
745extern const char *const rxrpc_call_completions[];
David Howellsdad8aff2016-03-09 23:22:56 +0000746extern unsigned int rxrpc_max_call_lifetime;
David Howells17926a72007-04-26 15:48:28 -0700747extern struct kmem_cache *rxrpc_call_jar;
David Howells17926a72007-04-26 15:48:28 -0700748
David Howells2341e072016-06-09 23:02:51 +0100749struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
David Howellsa25e21f2018-03-27 23:03:00 +0100750struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
David Howells2341e072016-06-09 23:02:51 +0100751struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
David Howells19ffa012016-04-04 14:00:36 +0100752 struct rxrpc_conn_parameters *,
David Howells999b69f2016-06-17 15:42:35 +0100753 struct sockaddr_rxrpc *,
David Howellsa25e21f2018-03-27 23:03:00 +0100754 struct rxrpc_call_params *, gfp_t,
755 unsigned int);
David Howellsc038a582017-08-29 10:19:01 +0100756int rxrpc_retry_client_call(struct rxrpc_sock *,
757 struct rxrpc_call *,
758 struct rxrpc_conn_parameters *,
759 struct sockaddr_rxrpc *,
760 gfp_t);
David Howells248f2192016-09-08 11:10:12 +0100761void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
762 struct sk_buff *);
David Howells8d94aa32016-09-07 09:19:31 +0100763void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
David Howellsc038a582017-08-29 10:19:01 +0100764int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *);
Joe Perchesc1b12032013-10-18 13:48:25 -0700765void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
David Howells8d94aa32016-09-07 09:19:31 +0100766bool __rxrpc_queue_call(struct rxrpc_call *);
767bool rxrpc_queue_call(struct rxrpc_call *);
David Howellse34d4232016-08-30 09:49:29 +0100768void rxrpc_see_call(struct rxrpc_call *);
David Howellsfff724292016-09-07 14:34:21 +0100769void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
770void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
David Howells00e90712016-09-08 11:10:12 +0100771void rxrpc_cleanup_call(struct rxrpc_call *);
David Howells2baec2c2017-05-24 17:02:32 +0100772void rxrpc_destroy_all_calls(struct rxrpc_net *);
David Howells17926a72007-04-26 15:48:28 -0700773
David Howellsdabe5a72016-08-23 15:27:24 +0100774static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
775{
776 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
777}
778
779static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
780{
781 return !rxrpc_is_service_call(call);
782}
783
David Howells17926a72007-04-26 15:48:28 -0700784/*
David Howellsf5c17aa2016-08-30 09:49:28 +0100785 * Transition a call to the complete state.
786 */
787static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
788 enum rxrpc_call_completion compl,
789 u32 abort_code,
790 int error)
791{
792 if (call->state < RXRPC_CALL_COMPLETE) {
793 call->abort_code = abort_code;
794 call->error = error;
795 call->completion = compl,
796 call->state = RXRPC_CALL_COMPLETE;
David Howells1bae5d22018-03-27 23:08:20 +0100797 trace_rxrpc_call_complete(call);
David Howellsc0d058c2016-09-23 12:39:23 +0100798 wake_up(&call->waitq);
David Howellsf5c17aa2016-08-30 09:49:28 +0100799 return true;
800 }
801 return false;
802}
803
804static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
805 enum rxrpc_call_completion compl,
806 u32 abort_code,
807 int error)
808{
David Howellse8d6bbb2016-09-07 16:34:12 +0100809 bool ret;
David Howellsf5c17aa2016-08-30 09:49:28 +0100810
811 write_lock_bh(&call->state_lock);
812 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
813 write_unlock_bh(&call->state_lock);
814 return ret;
815}
816
817/*
818 * Record that a call successfully completed.
819 */
David Howellse8d6bbb2016-09-07 16:34:12 +0100820static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
David Howellsf5c17aa2016-08-30 09:49:28 +0100821{
David Howellse8d6bbb2016-09-07 16:34:12 +0100822 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
David Howellsf5c17aa2016-08-30 09:49:28 +0100823}
824
David Howellse8d6bbb2016-09-07 16:34:12 +0100825static inline bool rxrpc_call_completed(struct rxrpc_call *call)
David Howellsf5c17aa2016-08-30 09:49:28 +0100826{
David Howellse8d6bbb2016-09-07 16:34:12 +0100827 bool ret;
828
David Howellsf5c17aa2016-08-30 09:49:28 +0100829 write_lock_bh(&call->state_lock);
David Howellse8d6bbb2016-09-07 16:34:12 +0100830 ret = __rxrpc_call_completed(call);
David Howellsf5c17aa2016-08-30 09:49:28 +0100831 write_unlock_bh(&call->state_lock);
David Howellse8d6bbb2016-09-07 16:34:12 +0100832 return ret;
David Howellsf5c17aa2016-08-30 09:49:28 +0100833}
834
835/*
836 * Record that a call is locally aborted.
837 */
David Howells5a429762016-09-06 22:19:51 +0100838static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
839 rxrpc_seq_t seq,
David Howellsf5c17aa2016-08-30 09:49:28 +0100840 u32 abort_code, int error)
841{
David Howellsa25e21f2018-03-27 23:03:00 +0100842 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
David Howells5a429762016-09-06 22:19:51 +0100843 abort_code, error);
David Howells248f2192016-09-08 11:10:12 +0100844 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
845 abort_code, error);
David Howellsf5c17aa2016-08-30 09:49:28 +0100846}
847
David Howells5a429762016-09-06 22:19:51 +0100848static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
849 rxrpc_seq_t seq, u32 abort_code, int error)
David Howellsf5c17aa2016-08-30 09:49:28 +0100850{
851 bool ret;
852
853 write_lock_bh(&call->state_lock);
David Howells5a429762016-09-06 22:19:51 +0100854 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
David Howellsf5c17aa2016-08-30 09:49:28 +0100855 write_unlock_bh(&call->state_lock);
856 return ret;
857}
858
859/*
David Howellsfb46f6e2017-04-06 10:12:00 +0100860 * Abort a call due to a protocol error.
861 */
862static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
863 struct sk_buff *skb,
864 const char *eproto_why,
865 const char *why,
866 u32 abort_code)
867{
868 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
869
870 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
871 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
872}
873
874#define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
875 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
876 (abort_why), (abort_code))
877
878/*
David Howells4a3388c2016-04-04 14:00:37 +0100879 * conn_client.c
880 */
David Howells45025bc2016-08-24 07:30:52 +0100881extern unsigned int rxrpc_max_client_connections;
882extern unsigned int rxrpc_reap_client_connections;
David Howellsa158bdd2017-11-24 10:18:41 +0000883extern unsigned long rxrpc_conn_idle_client_expiry;
884extern unsigned long rxrpc_conn_idle_client_fast_expiry;
David Howells4a3388c2016-04-04 14:00:37 +0100885extern struct idr rxrpc_client_conn_ids;
886
David Howellseb9b9d22016-06-27 10:32:02 +0100887void rxrpc_destroy_client_conn_ids(void);
David Howellsc6d2b8d2016-04-04 14:00:40 +0100888int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
889 struct sockaddr_rxrpc *, gfp_t);
David Howells45025bc2016-08-24 07:30:52 +0100890void rxrpc_expose_client_call(struct rxrpc_call *);
891void rxrpc_disconnect_client_call(struct rxrpc_call *);
892void rxrpc_put_client_conn(struct rxrpc_connection *);
David Howells2baec2c2017-05-24 17:02:32 +0100893void rxrpc_discard_expired_client_conns(struct work_struct *);
894void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
David Howells4a3388c2016-04-04 14:00:37 +0100895
896/*
David Howells0d81a512016-06-13 13:30:30 +0100897 * conn_event.c
898 */
899void rxrpc_process_connection(struct work_struct *);
David Howells0d81a512016-06-13 13:30:30 +0100900
901/*
902 * conn_object.c
David Howells17926a72007-04-26 15:48:28 -0700903 */
David Howellsdad8aff2016-03-09 23:22:56 +0000904extern unsigned int rxrpc_connection_expiry;
David Howellsf859ab62017-11-24 10:18:42 +0000905extern unsigned int rxrpc_closed_conn_expiry;
David Howells17926a72007-04-26 15:48:28 -0700906
David Howellsc6d2b8d2016-04-04 14:00:40 +0100907struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
David Howells8496af52016-07-01 07:51:50 +0100908struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
909 struct sk_buff *);
David Howells45025bc2016-08-24 07:30:52 +0100910void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
David Howells999b69f2016-06-17 15:42:35 +0100911void rxrpc_disconnect_call(struct rxrpc_call *);
David Howells45025bc2016-08-24 07:30:52 +0100912void rxrpc_kill_connection(struct rxrpc_connection *);
David Howells363deea2016-09-17 10:49:14 +0100913bool rxrpc_queue_conn(struct rxrpc_connection *);
914void rxrpc_see_connection(struct rxrpc_connection *);
915void rxrpc_get_connection(struct rxrpc_connection *);
916struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
917void rxrpc_put_service_conn(struct rxrpc_connection *);
David Howells2baec2c2017-05-24 17:02:32 +0100918void rxrpc_service_connection_reaper(struct work_struct *);
919void rxrpc_destroy_all_connections(struct rxrpc_net *);
David Howells17926a72007-04-26 15:48:28 -0700920
David Howells19ffa012016-04-04 14:00:36 +0100921static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
922{
923 return conn->out_clientflag;
924}
925
926static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
927{
David Howellse8d70ce2016-06-30 12:16:21 +0100928 return !rxrpc_conn_is_client(conn);
David Howells19ffa012016-04-04 14:00:36 +0100929}
930
David Howellsf51b4482016-08-23 15:27:24 +0100931static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
932{
David Howells45025bc2016-08-24 07:30:52 +0100933 if (!conn)
934 return;
935
David Howells363deea2016-09-17 10:49:14 +0100936 if (rxrpc_conn_is_client(conn))
937 rxrpc_put_client_conn(conn);
938 else
939 rxrpc_put_service_conn(conn);
David Howells5acbee42016-06-27 10:32:02 +0100940}
941
David Howells3136ef42017-11-24 10:18:41 +0000942static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
943 unsigned long expire_at)
944{
945 timer_reduce(&conn->timer, expire_at);
946}
947
David Howells17926a72007-04-26 15:48:28 -0700948/*
David Howells7877a4a2016-04-04 14:00:40 +0100949 * conn_service.c
950 */
David Howells8496af52016-07-01 07:51:50 +0100951struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
952 struct sk_buff *);
David Howells2baec2c2017-05-24 17:02:32 +0100953struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
David Howells47229742017-06-05 14:30:49 +0100954void rxrpc_new_incoming_connection(struct rxrpc_sock *,
955 struct rxrpc_connection *, struct sk_buff *);
David Howells001c1122016-06-30 10:45:22 +0100956void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
David Howells7877a4a2016-04-04 14:00:40 +0100957
958/*
David Howells0d81a512016-06-13 13:30:30 +0100959 * input.c
David Howells17926a72007-04-26 15:48:28 -0700960 */
David S. Miller676d2362014-04-11 16:15:36 -0400961void rxrpc_data_ready(struct sock *);
David Howells17926a72007-04-26 15:48:28 -0700962
963/*
David Howells0d81a512016-06-13 13:30:30 +0100964 * insecure.c
David Howells17926a72007-04-26 15:48:28 -0700965 */
David Howells0d81a512016-06-13 13:30:30 +0100966extern const struct rxrpc_security rxrpc_no_security;
David Howells17926a72007-04-26 15:48:28 -0700967
968/*
David Howells0d81a512016-06-13 13:30:30 +0100969 * key.c
David Howells17926a72007-04-26 15:48:28 -0700970 */
971extern struct key_type key_type_rxrpc;
972extern struct key_type key_type_rxrpc_s;
973
Joe Perchesc1b12032013-10-18 13:48:25 -0700974int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
975int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
Baolin Wang10674a02017-08-29 10:15:40 +0100976int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
Joe Perchesc1b12032013-10-18 13:48:25 -0700977 u32);
David Howells17926a72007-04-26 15:48:28 -0700978
979/*
David Howells87563612016-04-04 14:00:34 +0100980 * local_event.c
981 */
David Howells4f95dd72016-04-04 14:00:35 +0100982extern void rxrpc_process_local_events(struct rxrpc_local *);
David Howells87563612016-04-04 14:00:34 +0100983
984/*
David Howells0d81a512016-06-13 13:30:30 +0100985 * local_object.c
David Howells17926a72007-04-26 15:48:28 -0700986 */
David Howells2baec2c2017-05-24 17:02:32 +0100987struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
David Howells09d2bf52018-03-30 21:05:28 +0100988struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
989struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
990void rxrpc_put_local(struct rxrpc_local *);
991void rxrpc_queue_local(struct rxrpc_local *);
David Howells2baec2c2017-05-24 17:02:32 +0100992void rxrpc_destroy_all_locals(struct rxrpc_net *);
David Howellse0e4d822016-04-07 17:23:58 +0100993
994/*
David Howells8e688d92016-04-07 17:23:16 +0100995 * misc.c
996 */
David Howells0e119b42016-06-10 22:30:37 +0100997extern unsigned int rxrpc_max_backlog __read_mostly;
David Howellsa158bdd2017-11-24 10:18:41 +0000998extern unsigned long rxrpc_requested_ack_delay;
999extern unsigned long rxrpc_soft_ack_delay;
1000extern unsigned long rxrpc_idle_ack_delay;
David Howells8e688d92016-04-07 17:23:16 +01001001extern unsigned int rxrpc_rx_window_size;
1002extern unsigned int rxrpc_rx_mtu;
1003extern unsigned int rxrpc_rx_jumbo_max;
David Howellsa158bdd2017-11-24 10:18:41 +00001004extern unsigned long rxrpc_resend_timeout;
David Howells8e688d92016-04-07 17:23:16 +01001005
David Howells8e688d92016-04-07 17:23:16 +01001006extern const s8 rxrpc_ack_priority[];
1007
David Howells8e688d92016-04-07 17:23:16 +01001008/*
David Howells2baec2c2017-05-24 17:02:32 +01001009 * net_ns.c
1010 */
1011extern unsigned int rxrpc_net_id;
1012extern struct pernet_operations rxrpc_net_ops;
1013
1014static inline struct rxrpc_net *rxrpc_net(struct net *net)
1015{
1016 return net_generic(net, rxrpc_net_id);
1017}
1018
1019/*
David Howells0d81a512016-06-13 13:30:30 +01001020 * output.c
1021 */
David Howellsbd1fdf82017-11-24 10:18:42 +00001022int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
David Howells26cb02a2016-10-06 08:11:49 +01001023int rxrpc_send_abort_packet(struct rxrpc_call *);
David Howellsa1767072016-09-29 22:37:15 +01001024int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
David Howells248f2192016-09-08 11:10:12 +01001025void rxrpc_reject_packets(struct rxrpc_local *);
David Howellsace45be2018-03-30 21:04:43 +01001026void rxrpc_send_keepalive(struct rxrpc_peer *);
David Howells0d81a512016-06-13 13:30:30 +01001027
1028/*
David Howellsabe89ef2016-04-04 14:00:32 +01001029 * peer_event.c
David Howells0d81a512016-06-13 13:30:30 +01001030 */
David Howellsabe89ef2016-04-04 14:00:32 +01001031void rxrpc_error_report(struct sock *);
David Howellsf66d7492016-04-04 14:00:34 +01001032void rxrpc_peer_error_distributor(struct work_struct *);
David Howellscf1a6472016-09-22 00:41:53 +01001033void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1034 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
David Howellsace45be2018-03-30 21:04:43 +01001035void rxrpc_peer_keepalive_worker(struct work_struct *);
David Howells0d81a512016-06-13 13:30:30 +01001036
1037/*
1038 * peer_object.c
1039 */
David Howellsbe6e6702016-04-04 14:00:32 +01001040struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1041 const struct sockaddr_rxrpc *);
1042struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
1043 struct sockaddr_rxrpc *, gfp_t);
1044struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
David Howells248f2192016-09-08 11:10:12 +01001045struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
1046 struct rxrpc_peer *);
David Howells17226f12018-03-30 21:05:44 +01001047void rxrpc_destroy_all_peers(struct rxrpc_net *);
David Howells1159d4b2018-03-30 21:05:38 +01001048struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1049struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1050void rxrpc_put_peer(struct rxrpc_peer *);
1051void __rxrpc_queue_peer_error(struct rxrpc_peer *);
David Howells0d81a512016-06-13 13:30:30 +01001052
1053/*
1054 * proc.c
1055 */
Christoph Hellwigc3506372018-04-10 19:42:55 +02001056extern const struct seq_operations rxrpc_call_seq_ops;
1057extern const struct seq_operations rxrpc_connection_seq_ops;
David Howells0d81a512016-06-13 13:30:30 +01001058
1059/*
1060 * recvmsg.c
1061 */
David Howells248f2192016-09-08 11:10:12 +01001062void rxrpc_notify_socket(struct rxrpc_call *);
David Howells0d81a512016-06-13 13:30:30 +01001063int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1064
1065/*
David Howells648af7f2016-04-07 17:23:51 +01001066 * rxkad.c
1067 */
1068#ifdef CONFIG_RXKAD
1069extern const struct rxrpc_security rxkad;
1070#endif
1071
1072/*
David Howells0d81a512016-06-13 13:30:30 +01001073 * security.c
1074 */
1075int __init rxrpc_init_security(void);
1076void rxrpc_exit_security(void);
1077int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1078int rxrpc_init_server_conn_security(struct rxrpc_connection *);
David Howells71a17de2016-09-07 14:43:39 +01001079
David Howells0b58b8a2016-09-02 22:39:45 +01001080/*
1081 * sendmsg.c
1082 */
1083int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
David Howells0d81a512016-06-13 13:30:30 +01001084
1085/*
1086 * skbuff.c
1087 */
David Howellsd0016482016-08-30 20:42:14 +01001088void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
David Howells0d81a512016-06-13 13:30:30 +01001089void rxrpc_packet_destructor(struct sk_buff *);
David Howells71f3ca42016-09-17 10:49:14 +01001090void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1091void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1092void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1093void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1094void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
David Howellsdf844fd2016-08-23 15:27:24 +01001095void rxrpc_purge_queue(struct sk_buff_head *);
David Howells0d81a512016-06-13 13:30:30 +01001096
1097/*
David Howells5873c082014-02-07 18:58:44 +00001098 * sysctl.c
1099 */
1100#ifdef CONFIG_SYSCTL
1101extern int __init rxrpc_sysctl_init(void);
1102extern void rxrpc_sysctl_exit(void);
1103#else
1104static inline int __init rxrpc_sysctl_init(void) { return 0; }
1105static inline void rxrpc_sysctl_exit(void) {}
1106#endif
1107
1108/*
David Howellsbe6e6702016-04-04 14:00:32 +01001109 * utils.c
1110 */
David Howells7b674e32017-08-29 10:18:37 +01001111int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *,
1112 struct sk_buff *);
David Howellsbe6e6702016-04-04 14:00:32 +01001113
David Howells248f2192016-09-08 11:10:12 +01001114static inline bool before(u32 seq1, u32 seq2)
1115{
1116 return (s32)(seq1 - seq2) < 0;
1117}
1118static inline bool before_eq(u32 seq1, u32 seq2)
1119{
1120 return (s32)(seq1 - seq2) <= 0;
1121}
1122static inline bool after(u32 seq1, u32 seq2)
1123{
1124 return (s32)(seq1 - seq2) > 0;
1125}
1126static inline bool after_eq(u32 seq1, u32 seq2)
1127{
1128 return (s32)(seq1 - seq2) >= 0;
1129}
1130
David Howellsbe6e6702016-04-04 14:00:32 +01001131/*
David Howells17926a72007-04-26 15:48:28 -07001132 * debug tracing
1133 */
Eric Dumazet95c96172012-04-15 05:58:06 +00001134extern unsigned int rxrpc_debug;
David Howells17926a72007-04-26 15:48:28 -07001135
1136#define dbgprintk(FMT,...) \
Sven Schnelle9f389f42008-04-03 10:45:30 +01001137 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -07001138
Harvey Harrison0dc47872008-03-05 20:47:47 -08001139#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1140#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -07001141#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1142#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1143#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1144
1145
1146#if defined(__KDEBUG)
1147#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1148#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1149#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1150#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1151#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1152
1153#elif defined(CONFIG_AF_RXRPC_DEBUG)
1154#define RXRPC_DEBUG_KENTER 0x01
1155#define RXRPC_DEBUG_KLEAVE 0x02
1156#define RXRPC_DEBUG_KDEBUG 0x04
1157#define RXRPC_DEBUG_KPROTO 0x08
1158#define RXRPC_DEBUG_KNET 0x10
1159
1160#define _enter(FMT,...) \
1161do { \
1162 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1163 kenter(FMT,##__VA_ARGS__); \
1164} while (0)
1165
1166#define _leave(FMT,...) \
1167do { \
1168 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1169 kleave(FMT,##__VA_ARGS__); \
1170} while (0)
1171
1172#define _debug(FMT,...) \
1173do { \
1174 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1175 kdebug(FMT,##__VA_ARGS__); \
1176} while (0)
1177
1178#define _proto(FMT,...) \
1179do { \
1180 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1181 kproto(FMT,##__VA_ARGS__); \
1182} while (0)
1183
1184#define _net(FMT,...) \
1185do { \
1186 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1187 knet(FMT,##__VA_ARGS__); \
1188} while (0)
1189
1190#else
David Howells12fdff32010-08-12 16:54:57 +01001191#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1192#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1193#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1194#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1195#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -07001196#endif
1197
1198/*
1199 * debug assertion checking
1200 */
1201#if 1 // defined(__KDEBUGALL)
1202
1203#define ASSERT(X) \
1204do { \
1205 if (unlikely(!(X))) { \
Joe Perches9b6d5392016-06-02 12:08:52 -07001206 pr_err("Assertion failed\n"); \
David Howells17926a72007-04-26 15:48:28 -07001207 BUG(); \
1208 } \
David Howellsb4f13422016-03-04 15:56:19 +00001209} while (0)
David Howells17926a72007-04-26 15:48:28 -07001210
1211#define ASSERTCMP(X, OP, Y) \
1212do { \
David Howellscf132582016-09-08 11:10:11 +01001213 __typeof__(X) _x = (X); \
1214 __typeof__(Y) _y = (__typeof__(X))(Y); \
Joe Perches9b6d5392016-06-02 12:08:52 -07001215 if (unlikely(!(_x OP _y))) { \
David Howellscf132582016-09-08 11:10:11 +01001216 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1217 (unsigned long)_x, (unsigned long)_x, #OP, \
1218 (unsigned long)_y, (unsigned long)_y); \
David Howells17926a72007-04-26 15:48:28 -07001219 BUG(); \
1220 } \
David Howellsb4f13422016-03-04 15:56:19 +00001221} while (0)
David Howells17926a72007-04-26 15:48:28 -07001222
1223#define ASSERTIF(C, X) \
1224do { \
1225 if (unlikely((C) && !(X))) { \
Joe Perches9b6d5392016-06-02 12:08:52 -07001226 pr_err("Assertion failed\n"); \
David Howells17926a72007-04-26 15:48:28 -07001227 BUG(); \
1228 } \
David Howellsb4f13422016-03-04 15:56:19 +00001229} while (0)
David Howells17926a72007-04-26 15:48:28 -07001230
1231#define ASSERTIFCMP(C, X, OP, Y) \
1232do { \
David Howellscf132582016-09-08 11:10:11 +01001233 __typeof__(X) _x = (X); \
1234 __typeof__(Y) _y = (__typeof__(X))(Y); \
Joe Perches9b6d5392016-06-02 12:08:52 -07001235 if (unlikely((C) && !(_x OP _y))) { \
1236 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
David Howellscf132582016-09-08 11:10:11 +01001237 (unsigned long)_x, (unsigned long)_x, #OP, \
1238 (unsigned long)_y, (unsigned long)_y); \
David Howells17926a72007-04-26 15:48:28 -07001239 BUG(); \
1240 } \
David Howellsb4f13422016-03-04 15:56:19 +00001241} while (0)
David Howells17926a72007-04-26 15:48:28 -07001242
1243#else
1244
1245#define ASSERT(X) \
1246do { \
David Howellsb4f13422016-03-04 15:56:19 +00001247} while (0)
David Howells17926a72007-04-26 15:48:28 -07001248
1249#define ASSERTCMP(X, OP, Y) \
1250do { \
David Howellsb4f13422016-03-04 15:56:19 +00001251} while (0)
David Howells17926a72007-04-26 15:48:28 -07001252
1253#define ASSERTIF(C, X) \
1254do { \
David Howellsb4f13422016-03-04 15:56:19 +00001255} while (0)
David Howells17926a72007-04-26 15:48:28 -07001256
1257#define ASSERTIFCMP(C, X, OP, Y) \
1258do { \
David Howellsb4f13422016-03-04 15:56:19 +00001259} while (0)
David Howells17926a72007-04-26 15:48:28 -07001260
1261#endif /* __KDEBUGALL */