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Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001/* SPDX-License-Identifier: GPL-2.0-or-later */
David Howells17926a72007-04-26 15:48:28 -07002/* AF_RXRPC internal definitions
3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
David Howells17926a72007-04-26 15:48:28 -07006 */
7
David Howellsbe6e6702016-04-04 14:00:32 +01008#include <linux/atomic.h>
David Howells8496af52016-07-01 07:51:50 +01009#include <linux/seqlock.h>
David Howells2baec2c2017-05-24 17:02:32 +010010#include <net/net_namespace.h>
11#include <net/netns/generic.h>
David Howellse0e4d822016-04-07 17:23:58 +010012#include <net/sock.h>
David Howellsbe6e6702016-04-04 14:00:32 +010013#include <net/af_rxrpc.h>
David Howellsddc6c702017-07-21 10:07:10 +010014#include "protocol.h"
David Howells17926a72007-04-26 15:48:28 -070015
16#if 0
17#define CHECK_SLAB_OKAY(X) \
18 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
19 (POISON_FREE << 8 | POISON_FREE))
20#else
David Howellsb4f13422016-03-04 15:56:19 +000021#define CHECK_SLAB_OKAY(X) do {} while (0)
David Howells17926a72007-04-26 15:48:28 -070022#endif
23
David Howells17926a72007-04-26 15:48:28 -070024#define FCRYPT_BSIZE 8
25struct rxrpc_crypt {
26 union {
27 u8 x[FCRYPT_BSIZE];
Al Viro91e916c2008-03-29 03:08:38 +000028 __be32 n[2];
David Howells17926a72007-04-26 15:48:28 -070029 };
30} __attribute__((aligned(8)));
31
David Howells651350d2007-04-26 15:50:17 -070032#define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
33#define rxrpc_queue_delayed_work(WS,D) \
34 queue_delayed_work(rxrpc_workqueue, (WS), (D))
35
David Howellscc8feb82016-04-04 14:00:37 +010036struct rxrpc_connection;
37
David Howells17926a72007-04-26 15:48:28 -070038/*
David Howellsece64fe2018-09-27 15:13:08 +010039 * Mark applied to socket buffers in skb->mark. skb->priority is used
40 * to pass supplementary information.
David Howellsd0016482016-08-30 20:42:14 +010041 */
42enum rxrpc_skb_mark {
David Howellsece64fe2018-09-27 15:13:08 +010043 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
David Howellsd0016482016-08-30 20:42:14 +010045};
46
47/*
David Howells17926a72007-04-26 15:48:28 -070048 * sk_state for RxRPC sockets
49 */
50enum {
David Howells2341e072016-06-09 23:02:51 +010051 RXRPC_UNBOUND = 0,
52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
David Howells17926a72007-04-26 15:48:28 -070053 RXRPC_CLIENT_BOUND, /* client local address bound */
David Howells17926a72007-04-26 15:48:28 -070054 RXRPC_SERVER_BOUND, /* server local address bound */
David Howells28036f42017-06-05 14:30:49 +010055 RXRPC_SERVER_BOUND2, /* second server local address bound */
David Howells17926a72007-04-26 15:48:28 -070056 RXRPC_SERVER_LISTENING, /* server listening for connections */
David Howells210f0352017-01-05 10:38:36 +000057 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
David Howells17926a72007-04-26 15:48:28 -070058 RXRPC_CLOSE, /* socket is being closed */
59};
60
61/*
David Howells2baec2c2017-05-24 17:02:32 +010062 * Per-network namespace data.
63 */
64struct rxrpc_net {
65 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
66 u32 epoch; /* Local epoch for detecting local-end reset */
67 struct list_head calls; /* List of calls active in this namespace */
68 rwlock_t call_lock; /* Lock for ->calls */
David Howellsd3be4d22018-03-30 21:05:23 +010069 atomic_t nr_calls; /* Count of allocated calls */
David Howells2baec2c2017-05-24 17:02:32 +010070
David Howells31f5f9a162018-03-30 21:05:33 +010071 atomic_t nr_conns;
David Howells2baec2c2017-05-24 17:02:32 +010072 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
73 struct list_head service_conns; /* Service conns in this namespace */
74 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
David Howells3d18cbb2017-11-24 10:18:42 +000075 struct work_struct service_conn_reaper;
76 struct timer_list service_conn_reap_timer;
David Howells2baec2c2017-05-24 17:02:32 +010077
78 unsigned int nr_client_conns;
79 unsigned int nr_active_client_conns;
80 bool kill_all_client_conns;
David Howellsf859ab62017-11-24 10:18:42 +000081 bool live;
David Howells2baec2c2017-05-24 17:02:32 +010082 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
83 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
84 struct list_head waiting_client_conns;
85 struct list_head active_client_conns;
86 struct list_head idle_client_conns;
David Howells3d18cbb2017-11-24 10:18:42 +000087 struct work_struct client_conn_reaper;
88 struct timer_list client_conn_reap_timer;
David Howells2baec2c2017-05-24 17:02:32 +010089
90 struct list_head local_endpoints;
91 struct mutex local_mutex; /* Lock for ->local_endpoints */
92
David Howells2baec2c2017-05-24 17:02:32 +010093 DECLARE_HASHTABLE (peer_hash, 10);
David Howellsace45be2018-03-30 21:04:43 +010094 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
95
96#define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
97 u8 peer_keepalive_cursor;
David Howells330bdcf2018-08-08 11:30:02 +010098 time64_t peer_keepalive_base;
99 struct list_head peer_keepalive[32];
100 struct list_head peer_keepalive_new;
David Howellsace45be2018-03-30 21:04:43 +0100101 struct timer_list peer_keepalive_timer;
102 struct work_struct peer_keepalive_work;
David Howells2baec2c2017-05-24 17:02:32 +0100103};
104
105/*
David Howells00e90712016-09-08 11:10:12 +0100106 * Service backlog preallocation.
107 *
108 * This contains circular buffers of preallocated peers, connections and calls
109 * for incoming service calls and their head and tail pointers. This allows
110 * calls to be set up in the data_ready handler, thereby avoiding the need to
111 * shuffle packets around so much.
112 */
113struct rxrpc_backlog {
114 unsigned short peer_backlog_head;
115 unsigned short peer_backlog_tail;
116 unsigned short conn_backlog_head;
117 unsigned short conn_backlog_tail;
118 unsigned short call_backlog_head;
119 unsigned short call_backlog_tail;
120#define RXRPC_BACKLOG_MAX 32
121 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
122 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
123 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
124};
125
126/*
David Howells17926a72007-04-26 15:48:28 -0700127 * RxRPC socket definition
128 */
129struct rxrpc_sock {
130 /* WARNING: sk has to be the first member */
131 struct sock sk;
David Howellsd0016482016-08-30 20:42:14 +0100132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
David Howells00e90712016-09-08 11:10:12 +0100133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
David Howells17926a72007-04-26 15:48:28 -0700134 struct rxrpc_local *local; /* local endpoint */
David Howells00e90712016-09-08 11:10:12 +0100135 struct rxrpc_backlog *backlog; /* Preallocation for services */
David Howells248f2192016-09-08 11:10:12 +0100136 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
137 struct list_head sock_calls; /* List of calls owned by this socket */
138 struct list_head to_be_accepted; /* calls awaiting acceptance */
139 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
140 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
David Howells17926a72007-04-26 15:48:28 -0700141 struct key *key; /* security for this socket */
142 struct key *securities; /* list of server security descriptors */
David Howells00e90712016-09-08 11:10:12 +0100143 struct rb_root calls; /* User ID -> call mapping */
David Howells17926a72007-04-26 15:48:28 -0700144 unsigned long flags;
David Howells2341e072016-06-09 23:02:51 +0100145#define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
David Howells17926a72007-04-26 15:48:28 -0700146 rwlock_t call_lock; /* lock for calls */
147 u32 min_sec_level; /* minimum security level */
148#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
David Howellscc8feb82016-04-04 14:00:37 +0100149 bool exclusive; /* Exclusive connection for a client socket */
David Howells28036f42017-06-05 14:30:49 +0100150 u16 second_service; /* Additional service bound to the endpoint */
David Howells47229742017-06-05 14:30:49 +0100151 struct {
152 /* Service upgrade information */
153 u16 from; /* Service ID to upgrade (if not 0) */
154 u16 to; /* service ID to upgrade to */
155 } service_upgrade;
David Howellscc8feb82016-04-04 14:00:37 +0100156 sa_family_t family; /* Protocol family created with */
David Howells47229742017-06-05 14:30:49 +0100157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
David Howells2341e072016-06-09 23:02:51 +0100158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
David Howells17926a72007-04-26 15:48:28 -0700159};
160
161#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
162
163/*
David Howells0d12f8a2016-03-04 15:53:46 +0000164 * CPU-byteorder normalised Rx packet header.
165 */
166struct rxrpc_host_header {
167 u32 epoch; /* client boot timestamp */
168 u32 cid; /* connection and channel ID */
169 u32 callNumber; /* call ID (0 for connection-level packets) */
170 u32 seq; /* sequence number of pkt in call stream */
171 u32 serial; /* serial number of pkt sent to network */
172 u8 type; /* packet type */
173 u8 flags; /* packet flags */
174 u8 userStatus; /* app-layer defined status */
175 u8 securityIndex; /* security protocol ID */
176 union {
177 u16 _rsvd; /* reserved */
178 u16 cksum; /* kerberos security checksum */
179 };
180 u16 serviceId; /* service ID */
181} __packed;
182
183/*
David Howells17926a72007-04-26 15:48:28 -0700184 * RxRPC socket buffer private variables
185 * - max 48 bytes (struct sk_buff::cb)
186 */
187struct rxrpc_skb_priv {
David Howells248f2192016-09-08 11:10:12 +0100188 union {
David Howells50235c42016-09-22 00:29:31 +0100189 u8 nr_jumbo; /* Number of jumbo subpackets */
David Howells248f2192016-09-08 11:10:12 +0100190 };
David Howells17926a72007-04-26 15:48:28 -0700191 union {
David Howells17926a72007-04-26 15:48:28 -0700192 int remain; /* amount of space remaining for next write */
David Howells17926a72007-04-26 15:48:28 -0700193 };
194
David Howells0d12f8a2016-03-04 15:53:46 +0000195 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
David Howells17926a72007-04-26 15:48:28 -0700196};
197
198#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
199
David Howells17926a72007-04-26 15:48:28 -0700200/*
201 * RxRPC security module interface
202 */
203struct rxrpc_security {
David Howells17926a72007-04-26 15:48:28 -0700204 const char *name; /* name of this service */
205 u8 security_index; /* security type provided */
206
David Howells648af7f2016-04-07 17:23:51 +0100207 /* Initialise a security service */
208 int (*init)(void);
209
210 /* Clean up a security service */
211 void (*exit)(void);
212
David Howells17926a72007-04-26 15:48:28 -0700213 /* initialise a connection's security */
214 int (*init_connection_security)(struct rxrpc_connection *);
215
216 /* prime a connection's packet security */
Herbert Xua2636292016-06-26 14:55:24 -0700217 int (*prime_packet_security)(struct rxrpc_connection *);
David Howells17926a72007-04-26 15:48:28 -0700218
219 /* impose security on a packet */
Herbert Xua2636292016-06-26 14:55:24 -0700220 int (*secure_packet)(struct rxrpc_call *,
David Howells17926a72007-04-26 15:48:28 -0700221 struct sk_buff *,
222 size_t,
223 void *);
224
225 /* verify the security on a received packet */
David Howells5a429762016-09-06 22:19:51 +0100226 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
David Howells248f2192016-09-08 11:10:12 +0100227 unsigned int, unsigned int, rxrpc_seq_t, u16);
228
229 /* Locate the data in a received packet that has been verified. */
230 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
231 unsigned int *, unsigned int *);
David Howells17926a72007-04-26 15:48:28 -0700232
233 /* issue a challenge */
234 int (*issue_challenge)(struct rxrpc_connection *);
235
236 /* respond to a challenge */
237 int (*respond_to_challenge)(struct rxrpc_connection *,
238 struct sk_buff *,
239 u32 *);
240
241 /* verify a response */
242 int (*verify_response)(struct rxrpc_connection *,
243 struct sk_buff *,
244 u32 *);
245
246 /* clear connection security */
247 void (*clear)(struct rxrpc_connection *);
248};
249
250/*
David Howells4f95dd72016-04-04 14:00:35 +0100251 * RxRPC local transport endpoint description
252 * - owned by a single AF_RXRPC socket
253 * - pointed to by transport socket struct sk_user_data
David Howells17926a72007-04-26 15:48:28 -0700254 */
255struct rxrpc_local {
David Howells4f95dd72016-04-04 14:00:35 +0100256 struct rcu_head rcu;
257 atomic_t usage;
David Howells2baec2c2017-05-24 17:02:32 +0100258 struct rxrpc_net *rxnet; /* The network ns in which this resides */
David Howells4f95dd72016-04-04 14:00:35 +0100259 struct list_head link;
David Howells17926a72007-04-26 15:48:28 -0700260 struct socket *socket; /* my UDP socket */
David Howells4f95dd72016-04-04 14:00:35 +0100261 struct work_struct processor;
David Howells1e9e5c92016-09-29 22:37:15 +0100262 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
David Howells17926a72007-04-26 15:48:28 -0700263 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
David Howells17926a72007-04-26 15:48:28 -0700264 struct sk_buff_head reject_queue; /* packets awaiting rejection */
David Howells44ba0692015-04-01 16:31:26 +0100265 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
David Howells999b69f2016-06-17 15:42:35 +0100266 struct rb_root client_conns; /* Client connections by socket params */
267 spinlock_t client_conns_lock; /* Lock for client_conns */
David Howells17926a72007-04-26 15:48:28 -0700268 spinlock_t lock; /* access lock */
269 rwlock_t services_lock; /* lock for services list */
David Howells17926a72007-04-26 15:48:28 -0700270 int debug_id; /* debug ID for printks */
David Howells4f95dd72016-04-04 14:00:35 +0100271 bool dead;
David Howellsf859ab62017-11-24 10:18:42 +0000272 bool service_closed; /* Service socket closed */
David Howells17926a72007-04-26 15:48:28 -0700273 struct sockaddr_rxrpc srx; /* local address */
274};
275
276/*
277 * RxRPC remote transport endpoint definition
David Howellsbe6e6702016-04-04 14:00:32 +0100278 * - matched by local endpoint, remote port, address and protocol type
David Howells17926a72007-04-26 15:48:28 -0700279 */
280struct rxrpc_peer {
David Howellsbe6e6702016-04-04 14:00:32 +0100281 struct rcu_head rcu; /* This must be first */
282 atomic_t usage;
283 unsigned long hash_key;
284 struct hlist_node hash_link;
285 struct rxrpc_local *local;
David Howellsf66d7492016-04-04 14:00:34 +0100286 struct hlist_head error_targets; /* targets for net error distribution */
David Howellsaa390bb2016-06-17 10:06:56 +0100287 struct rb_root service_conns; /* Service connections */
David Howells330bdcf2018-08-08 11:30:02 +0100288 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
David Howellsace45be2018-03-30 21:04:43 +0100289 time64_t last_tx_at; /* Last time packet sent here */
David Howells8496af52016-07-01 07:51:50 +0100290 seqlock_t service_conn_lock;
David Howells17926a72007-04-26 15:48:28 -0700291 spinlock_t lock; /* access lock */
Eric Dumazet95c96172012-04-15 05:58:06 +0000292 unsigned int if_mtu; /* interface MTU for this peer */
293 unsigned int mtu; /* network MTU for this peer */
294 unsigned int maxdata; /* data size (MTU - hdrsize) */
David Howells17926a72007-04-26 15:48:28 -0700295 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
296 int debug_id; /* debug ID for printks */
David Howells17926a72007-04-26 15:48:28 -0700297 struct sockaddr_rxrpc srx; /* remote address */
298
299 /* calculated RTT cache */
300#define RXRPC_RTT_CACHE_SIZE 32
David Howellsc1e15b42018-10-08 15:46:25 +0100301 spinlock_t rtt_input_lock; /* RTT lock for input routine */
David Howells0d4b1032016-09-22 00:29:31 +0100302 ktime_t rtt_last_req; /* Time of last RTT request */
David Howellscf1a6472016-09-22 00:41:53 +0100303 u64 rtt; /* Current RTT estimate (in nS) */
304 u64 rtt_sum; /* Sum of cache contents */
305 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
306 u8 rtt_cursor; /* next entry at which to insert */
307 u8 rtt_usage; /* amount of cache actually used */
David Howellsf7aec122017-06-14 17:56:50 +0100308
309 u8 cong_cwnd; /* Congestion window size */
David Howells17926a72007-04-26 15:48:28 -0700310};
311
312/*
David Howells19ffa012016-04-04 14:00:36 +0100313 * Keys for matching a connection.
314 */
315struct rxrpc_conn_proto {
David Howellse8d70ce2016-06-30 12:16:21 +0100316 union {
317 struct {
318 u32 epoch; /* epoch of this connection */
319 u32 cid; /* connection ID */
320 };
321 u64 index_key;
David Howells19ffa012016-04-04 14:00:36 +0100322 };
323};
324
325struct rxrpc_conn_parameters {
326 struct rxrpc_local *local; /* Representation of local endpoint */
327 struct rxrpc_peer *peer; /* Remote endpoint */
328 struct key *key; /* Security details */
329 bool exclusive; /* T if conn is exclusive */
David Howells4e255722017-06-05 14:30:49 +0100330 bool upgrade; /* T if service ID can be upgraded */
David Howells19ffa012016-04-04 14:00:36 +0100331 u16 service_id; /* Service ID for this connection */
332 u32 security_level; /* Security level selected */
333};
334
335/*
David Howellsbba304d2016-06-27 10:32:02 +0100336 * Bits in the connection flags.
337 */
338enum rxrpc_conn_flag {
339 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
David Howells001c1122016-06-30 10:45:22 +0100340 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
341 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
David Howells45025bc2016-08-24 07:30:52 +0100342 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
343 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
344 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
David Howells4e255722017-06-05 14:30:49 +0100345 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
David Howells3136ef42017-11-24 10:18:41 +0000346 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
347 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
348 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
349 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
David Howellsbba304d2016-06-27 10:32:02 +0100350};
351
David Howells3136ef42017-11-24 10:18:41 +0000352#define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
353 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
354 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
355 (1UL << RXRPC_CONN_FINAL_ACK_3))
356
David Howellsbba304d2016-06-27 10:32:02 +0100357/*
358 * Events that can be raised upon a connection.
359 */
360enum rxrpc_conn_event {
361 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
362};
363
364/*
David Howells45025bc2016-08-24 07:30:52 +0100365 * The connection cache state.
366 */
367enum rxrpc_conn_cache_state {
368 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
369 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
370 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
David Howells4e255722017-06-05 14:30:49 +0100371 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */
David Howells45025bc2016-08-24 07:30:52 +0100372 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
373 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
David Howells363deea2016-09-17 10:49:14 +0100374 RXRPC_CONN__NR_CACHE_STATES
David Howells45025bc2016-08-24 07:30:52 +0100375};
376
377/*
David Howellsbba304d2016-06-27 10:32:02 +0100378 * The connection protocol state.
379 */
380enum rxrpc_conn_proto_state {
381 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
382 RXRPC_CONN_CLIENT, /* Client connection */
David Howells00e90712016-09-08 11:10:12 +0100383 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
David Howellsbba304d2016-06-27 10:32:02 +0100384 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
385 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
386 RXRPC_CONN_SERVICE, /* Service secured connection */
387 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
388 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
David Howellsbba304d2016-06-27 10:32:02 +0100389 RXRPC_CONN__NR_STATES
390};
391
392/*
David Howells17926a72007-04-26 15:48:28 -0700393 * RxRPC connection definition
David Howellsaa390bb2016-06-17 10:06:56 +0100394 * - matched by { local, peer, epoch, conn_id, direction }
David Howells17926a72007-04-26 15:48:28 -0700395 * - each connection can only handle four simultaneous calls
396 */
397struct rxrpc_connection {
David Howells19ffa012016-04-04 14:00:36 +0100398 struct rxrpc_conn_proto proto;
399 struct rxrpc_conn_parameters params;
400
David Howells45025bc2016-08-24 07:30:52 +0100401 atomic_t usage;
402 struct rcu_head rcu;
403 struct list_head cache_link;
David Howellsa1399f82016-06-27 14:39:44 +0100404
David Howells45025bc2016-08-24 07:30:52 +0100405 spinlock_t channel_lock;
406 unsigned char active_chans; /* Mask of active channels */
407#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
408 struct list_head waiting_calls; /* Calls waiting for channels */
David Howellsa1399f82016-06-27 14:39:44 +0100409 struct rxrpc_channel {
David Howells3136ef42017-11-24 10:18:41 +0000410 unsigned long final_ack_at; /* Time at which to issue final ACK */
David Howellsa1399f82016-06-27 14:39:44 +0100411 struct rxrpc_call __rcu *call; /* Active call */
David Howells4764c0d2018-07-23 17:18:37 +0100412 unsigned int call_debug_id; /* call->debug_id */
David Howellsa1399f82016-06-27 14:39:44 +0100413 u32 call_id; /* ID of current call */
414 u32 call_counter; /* Call ID counter */
415 u32 last_call; /* ID of last call */
David Howells18bfeba2016-08-23 15:27:25 +0100416 u8 last_type; /* Type of last packet */
David Howells18bfeba2016-08-23 15:27:25 +0100417 union {
418 u32 last_seq;
419 u32 last_abort;
420 };
David Howellsa1399f82016-06-27 14:39:44 +0100421 } channels[RXRPC_MAXCALLS];
David Howells999b69f2016-06-17 15:42:35 +0100422
David Howells3136ef42017-11-24 10:18:41 +0000423 struct timer_list timer; /* Conn event timer */
David Howells17926a72007-04-26 15:48:28 -0700424 struct work_struct processor; /* connection event processor */
David Howells999b69f2016-06-17 15:42:35 +0100425 union {
426 struct rb_node client_node; /* Node in local->client_conns */
David Howellsaa390bb2016-06-17 10:06:56 +0100427 struct rb_node service_node; /* Node in peer->service_conns */
David Howells999b69f2016-06-17 15:42:35 +0100428 };
David Howells4d028b22016-08-24 07:30:52 +0100429 struct list_head proc_link; /* link in procfs list */
David Howells17926a72007-04-26 15:48:28 -0700430 struct list_head link; /* link in master connection list */
David Howells17926a72007-04-26 15:48:28 -0700431 struct sk_buff_head rx_queue; /* received conn-level packets */
David Howells648af7f2016-04-07 17:23:51 +0100432 const struct rxrpc_security *security; /* applied security module */
David Howells17926a72007-04-26 15:48:28 -0700433 struct key *server_key; /* security for this service */
Kees Cook69d826f2018-09-18 19:10:47 -0700434 struct crypto_sync_skcipher *cipher; /* encryption handle */
David Howells17926a72007-04-26 15:48:28 -0700435 struct rxrpc_crypt csum_iv; /* packet checksum base */
David Howells4a3388c2016-04-04 14:00:37 +0100436 unsigned long flags;
David Howells17926a72007-04-26 15:48:28 -0700437 unsigned long events;
David Howellsf51b4482016-08-23 15:27:24 +0100438 unsigned long idle_timestamp; /* Time at which last became idle */
David Howells17926a72007-04-26 15:48:28 -0700439 spinlock_t state_lock; /* state-change lock */
David Howellscf132582016-09-08 11:10:11 +0100440 enum rxrpc_conn_cache_state cache_state;
441 enum rxrpc_conn_proto_state state; /* current state of connection */
David Howells64753092018-10-08 15:46:17 +0100442 u32 abort_code; /* Abort code of connection abort */
David Howells17926a72007-04-26 15:48:28 -0700443 int debug_id; /* debug ID for printks */
David Howells17926a72007-04-26 15:48:28 -0700444 atomic_t serial; /* packet serial number counter */
David Howells563ea7d2016-08-23 15:27:25 +0100445 unsigned int hi_serial; /* highest serial number received */
David Howells17926a72007-04-26 15:48:28 -0700446 u32 security_nonce; /* response re-use preventer */
David Howellsc1e15b42018-10-08 15:46:25 +0100447 u32 service_id; /* Service ID, possibly upgraded */
David Howells5a924b82016-09-22 00:29:31 +0100448 u8 size_align; /* data size alignment (for security) */
449 u8 security_size; /* security header size */
David Howells17926a72007-04-26 15:48:28 -0700450 u8 security_ix; /* security type */
David Howells17926a72007-04-26 15:48:28 -0700451 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
David Howells64753092018-10-08 15:46:17 +0100452 short error; /* Local error code */
David Howells17926a72007-04-26 15:48:28 -0700453};
454
David Howellsdc71db32018-09-27 15:13:08 +0100455static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
456{
457 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
458}
459
460static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
461{
462 return !rxrpc_to_server(sp);
463}
464
David Howells17926a72007-04-26 15:48:28 -0700465/*
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 Howellsa5af7e12016-10-06 08:11:49 +0100475 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
David Howells8e831342016-09-22 00:29:31 +0100476 RXRPC_CALL_PINGING, /* Ping in process */
David Howells57494342016-09-24 18:05:27 +0100477 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
David Howellsc54e43d2018-05-10 23:26:00 +0100478 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
David Howells1a025022018-06-03 02:17:39 +0100479 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
David Howellsd0b35a42018-07-23 17:18:38 +0100480 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
David Howellsb960a342019-05-09 08:21:21 +0100481 RXRPC_CALL_IS_INTR, /* The call is interruptible */
David Howells5b8848d2016-03-04 15:53:46 +0000482};
483
484/*
485 * Events that can be raised on a call.
486 */
487enum rxrpc_call_event {
David Howells4c198ad2016-03-04 15:53:46 +0000488 RXRPC_CALL_EV_ACK, /* need to generate ACK */
David Howells4c198ad2016-03-04 15:53:46 +0000489 RXRPC_CALL_EV_ABORT, /* need to generate abort */
David Howells4c198ad2016-03-04 15:53:46 +0000490 RXRPC_CALL_EV_RESEND, /* Tx resend required */
David Howellsa5af7e12016-10-06 08:11:49 +0100491 RXRPC_CALL_EV_PING, /* Ping send required */
David Howellsa158bdd2017-11-24 10:18:41 +0000492 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
David Howellsbd1fdf82017-11-24 10:18:42 +0000493 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
David Howells5b8848d2016-03-04 15:53:46 +0000494};
495
496/*
497 * The states that a call can be in.
498 */
499enum rxrpc_call_state {
David Howells999b69f2016-06-17 15:42:35 +0100500 RXRPC_CALL_UNINITIALISED,
501 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
David Howells5b8848d2016-03-04 15:53:46 +0000502 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
503 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
504 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
David Howells00e90712016-09-08 11:10:12 +0100505 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
David Howells5b8848d2016-03-04 15:53:46 +0000506 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
507 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
508 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
509 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
510 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
511 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
David Howellsf5c17aa2016-08-30 09:49:28 +0100512 RXRPC_CALL_COMPLETE, /* - call complete */
David Howellsf5c17aa2016-08-30 09:49:28 +0100513 NR__RXRPC_CALL_STATES
514};
515
516/*
David Howellse122d842019-01-10 16:59:13 +0000517 * Call completion condition (state == RXRPC_CALL_COMPLETE).
518 */
519enum rxrpc_call_completion {
520 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
521 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
522 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
523 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
524 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
525 NR__RXRPC_CALL_COMPLETIONS
526};
527
528/*
David Howells57494342016-09-24 18:05:27 +0100529 * Call Tx congestion management modes.
530 */
531enum rxrpc_congest_mode {
532 RXRPC_CALL_SLOW_START,
533 RXRPC_CALL_CONGEST_AVOIDANCE,
534 RXRPC_CALL_PACKET_LOSS,
535 RXRPC_CALL_FAST_RETRANSMIT,
536 NR__RXRPC_CONGEST_MODES
537};
538
539/*
David Howells17926a72007-04-26 15:48:28 -0700540 * RxRPC call definition
541 * - matched by { connection, call_id }
542 */
543struct rxrpc_call {
David Howellsdee46362016-06-27 17:11:19 +0100544 struct rcu_head rcu;
David Howells17926a72007-04-26 15:48:28 -0700545 struct rxrpc_connection *conn; /* connection carrying call */
David Howellsdf5d8bf2016-08-24 14:31:43 +0100546 struct rxrpc_peer *peer; /* Peer record for remote address */
David Howells8d94aa32016-09-07 09:19:31 +0100547 struct rxrpc_sock __rcu *socket; /* socket responsible */
David Howellsd3be4d22018-03-30 21:05:23 +0100548 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
David Howells540b1c42017-02-27 15:43:06 +0000549 struct mutex user_mutex; /* User access mutex */
David Howellsa158bdd2017-11-24 10:18:41 +0000550 unsigned long ack_at; /* When deferred ACK needs to happen */
David Howellsbd1fdf82017-11-24 10:18:42 +0000551 unsigned long ack_lost_at; /* When ACK is figured as lost */
David Howellsa158bdd2017-11-24 10:18:41 +0000552 unsigned long resend_at; /* When next resend needs to happen */
553 unsigned long ping_at; /* When next to send a ping */
David Howells415f44e2017-11-24 10:18:42 +0000554 unsigned long keepalive_at; /* When next to send a keepalive ping */
David Howellsa158bdd2017-11-24 10:18:41 +0000555 unsigned long expect_rx_by; /* When we expect to get a packet by */
556 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
557 unsigned long expect_term_by; /* When we expect call termination by */
558 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
559 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
David Howells248f2192016-09-08 11:10:12 +0100560 struct timer_list timer; /* Combined event timer */
561 struct work_struct processor; /* Event processor */
David Howellsd0016482016-08-30 20:42:14 +0100562 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
David Howells17926a72007-04-26 15:48:28 -0700563 struct list_head link; /* link in master call list */
David Howells45025bc2016-08-24 07:30:52 +0100564 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
David Howellsf66d7492016-04-04 14:00:34 +0100565 struct hlist_node error_link; /* link in error distribution list */
David Howells248f2192016-09-08 11:10:12 +0100566 struct list_head accept_link; /* Link in rx->acceptq */
567 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
568 struct list_head sock_link; /* Link in rx->sock_calls */
569 struct rb_node sock_node; /* Node in rx->calls */
David Howells17926a72007-04-26 15:48:28 -0700570 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
David Howells45025bc2016-08-24 07:30:52 +0100571 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
David Howellse754eba2017-06-07 12:40:03 +0100572 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
Herbert Xua2636292016-06-26 14:55:24 -0700573 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
David Howells17926a72007-04-26 15:48:28 -0700574 unsigned long user_call_ID; /* user-defined call ID */
David Howells17926a72007-04-26 15:48:28 -0700575 unsigned long flags;
David Howells17926a72007-04-26 15:48:28 -0700576 unsigned long events;
David Howells17926a72007-04-26 15:48:28 -0700577 spinlock_t lock;
David Howells20acbd92017-11-02 15:06:08 +0000578 spinlock_t notify_lock; /* Kernel notification lock */
David Howells17926a72007-04-26 15:48:28 -0700579 rwlock_t state_lock; /* lock for state transition */
David Howellsf5c17aa2016-08-30 09:49:28 +0100580 u32 abort_code; /* Local/remote abort code */
581 int error; /* Local error incurred */
David Howellscf132582016-09-08 11:10:11 +0100582 enum rxrpc_call_state state; /* current state of call */
583 enum rxrpc_call_completion completion; /* Call completion condition */
David Howells17926a72007-04-26 15:48:28 -0700584 atomic_t usage;
David Howellsdabe5a72016-08-23 15:27:24 +0100585 u16 service_id; /* service ID */
David Howells278ac0c2016-09-07 15:19:25 +0100586 u8 security_ix; /* Security type */
David Howellsdabe5a72016-08-23 15:27:24 +0100587 u32 call_id; /* call ID on connection */
588 u32 cid; /* connection ID plus channel index */
589 int debug_id; /* debug ID for printks */
David Howells8e831342016-09-22 00:29:31 +0100590 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
591 unsigned short rx_pkt_len; /* Current recvmsg packet len */
David Howells17926a72007-04-26 15:48:28 -0700592
David Howells248f2192016-09-08 11:10:12 +0100593 /* Rx/Tx circular buffer, depending on phase.
594 *
595 * In the Rx phase, packets are annotated with 0 or the number of the
596 * segment of a jumbo packet each buffer refers to. There can be up to
597 * 47 segments in a maximum-size UDP packet.
598 *
599 * In the Tx phase, packets are annotated with which buffers have been
600 * acked.
601 */
602#define RXRPC_RXTX_BUFF_SIZE 64
603#define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
David Howells40752952018-07-23 17:18:37 +0100604#define RXRPC_INIT_RX_WINDOW_SIZE 63
David Howells248f2192016-09-08 11:10:12 +0100605 struct sk_buff **rxtx_buffer;
606 u8 *rxtx_annotations;
607#define RXRPC_TX_ANNO_ACK 0
608#define RXRPC_TX_ANNO_UNACK 1
609#define RXRPC_TX_ANNO_NAK 2
610#define RXRPC_TX_ANNO_RETRANS 3
David Howellsf07373e2016-09-22 00:29:32 +0100611#define RXRPC_TX_ANNO_MASK 0x03
David Howells70790dbe2016-09-23 12:39:22 +0100612#define RXRPC_TX_ANNO_LAST 0x04
613#define RXRPC_TX_ANNO_RESENT 0x08
614
David Howells248f2192016-09-08 11:10:12 +0100615#define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
616#define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
617#define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
618 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
619 * not hard-ACK'd packet follows this.
David Howells17926a72007-04-26 15:48:28 -0700620 */
David Howells248f2192016-09-08 11:10:12 +0100621 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
David Howellsc7e86ac2018-11-01 13:39:53 +0000622 u16 tx_backoff; /* Delay to insert due to Tx failure */
David Howells57494342016-09-24 18:05:27 +0100623
624 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
625 * is fixed, we keep these numbers in terms of segments (ie. DATA
626 * packets) rather than bytes.
627 */
628#define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
629 u8 cong_cwnd; /* Congestion window size */
630 u8 cong_extra; /* Extra to send for congestion management */
631 u8 cong_ssthresh; /* Slow-start threshold */
632 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
633 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
634 u8 cong_cumul_acks; /* Cumulative ACK count */
635 ktime_t cong_tstamp; /* Last time cwnd was changed */
636
David Howells248f2192016-09-08 11:10:12 +0100637 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
638 * consumed packet follows this.
639 */
640 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
641 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
David Howells1a025022018-06-03 02:17:39 +0100642 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
David Howells248f2192016-09-08 11:10:12 +0100643 u8 rx_winsize; /* Size of Rx window */
644 u8 tx_winsize; /* Maximum size of Tx window */
David Howells71f3ca42016-09-17 10:49:14 +0100645 bool tx_phase; /* T if transmission phase, F if receive phase */
David Howells75e42122016-09-13 22:36:22 +0100646 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
David Howells17926a72007-04-26 15:48:28 -0700647
David Howellsc1e15b42018-10-08 15:46:25 +0100648 spinlock_t input_lock; /* Lock for packet input to this call */
649
David Howells17926a72007-04-26 15:48:28 -0700650 /* receive-phase ACK management */
David Howells4e36a952009-09-16 00:01:13 -0700651 u8 ackr_reason; /* reason to ACK */
David Howells563ea7d2016-08-23 15:27:25 +0100652 u16 ackr_skew; /* skew on packet being ACK'd */
David Howells0d12f8a2016-03-04 15:53:46 +0000653 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
Jeffrey Altman1a2391c2019-04-12 16:34:16 +0100654 rxrpc_serial_t ackr_first_seq; /* first sequence number received */
David Howells248f2192016-09-08 11:10:12 +0100655 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
David Howells805b21b2016-09-24 18:05:26 +0100656 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
657 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
David Howellsa5af7e12016-10-06 08:11:49 +0100658
659 /* ping management */
660 rxrpc_serial_t ping_serial; /* Last ping sent */
661 ktime_t ping_time; /* Time last ping sent */
David Howells17926a72007-04-26 15:48:28 -0700662
David Howells248f2192016-09-08 11:10:12 +0100663 /* transmission-phase ACK management */
David Howells57494342016-09-24 18:05:27 +0100664 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
David Howells248f2192016-09-08 11:10:12 +0100665 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
David Howells31a1b9892016-09-24 18:05:26 +0100666 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
David Howellsbd1fdf82017-11-24 10:18:42 +0000667 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
668 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
David Howells31a1b9892016-09-24 18:05:26 +0100669};
670
671/*
David Howells57494342016-09-24 18:05:27 +0100672 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
David Howells31a1b9892016-09-24 18:05:26 +0100673 */
674struct rxrpc_ack_summary {
675 u8 ack_reason;
676 u8 nr_acks; /* Number of ACKs in packet */
677 u8 nr_nacks; /* Number of NACKs in packet */
678 u8 nr_new_acks; /* Number of new ACKs in packet */
679 u8 nr_new_nacks; /* Number of new NACKs in packet */
680 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
681 bool new_low_nack; /* T if new low NACK found */
David Howells57494342016-09-24 18:05:27 +0100682 bool retrans_timeo; /* T if reTx due to timeout happened */
683 u8 flight_size; /* Number of unreceived transmissions */
684 /* Place to stash values for tracing */
685 enum rxrpc_congest_mode mode:8;
686 u8 cwnd;
687 u8 ssthresh;
688 u8 dup_acks;
689 u8 cumulative_acks;
David Howells17926a72007-04-26 15:48:28 -0700690};
691
David Howells48124172017-11-24 10:18:41 +0000692/*
693 * sendmsg() cmsg-specified parameters.
694 */
695enum rxrpc_command {
696 RXRPC_CMD_SEND_DATA, /* send data message */
697 RXRPC_CMD_SEND_ABORT, /* request abort generation */
698 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
699 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
700};
701
702struct rxrpc_call_params {
703 s64 tx_total_len; /* Total Tx data length (if send data) */
704 unsigned long user_call_ID; /* User's call ID */
705 struct {
706 u32 hard; /* Maximum lifetime (sec) */
707 u32 idle; /* Max time since last data packet (msec) */
708 u32 normal; /* Max time since last call packet (msec) */
709 } timeouts;
710 u8 nr_timeouts; /* Number of timeouts specified */
David Howellsb960a342019-05-09 08:21:21 +0100711 bool intr; /* The call is interruptible */
David Howells48124172017-11-24 10:18:41 +0000712};
713
714struct rxrpc_send_params {
715 struct rxrpc_call_params call;
716 u32 abort_code; /* Abort code to Tx (if abort) */
717 enum rxrpc_command command : 8; /* The command to implement */
718 bool exclusive; /* Shared or exclusive call */
719 bool upgrade; /* If the connection is upgradeable */
720};
721
David Howellsdf844fd2016-08-23 15:27:24 +0100722#include <trace/events/rxrpc.h>
723
David Howells17926a72007-04-26 15:48:28 -0700724/*
David Howells651350d2007-04-26 15:50:17 -0700725 * af_rxrpc.c
David Howells17926a72007-04-26 15:48:28 -0700726 */
David Howells71f3ca42016-09-17 10:49:14 +0100727extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
David Howells651350d2007-04-26 15:50:17 -0700728extern struct workqueue_struct *rxrpc_workqueue;
David Howells17926a72007-04-26 15:48:28 -0700729
730/*
David Howells0d81a512016-06-13 13:30:30 +0100731 * call_accept.c
David Howells17926a72007-04-26 15:48:28 -0700732 */
David Howells00e90712016-09-08 11:10:12 +0100733int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
734void rxrpc_discard_prealloc(struct rxrpc_sock *);
David Howells248f2192016-09-08 11:10:12 +0100735struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
David Howells0099dc52018-09-27 15:13:09 +0100736 struct rxrpc_sock *,
David Howells248f2192016-09-08 11:10:12 +0100737 struct sk_buff *);
David Howells4f95dd72016-04-04 14:00:35 +0100738void rxrpc_accept_incoming_calls(struct rxrpc_local *);
David Howellsd0016482016-08-30 20:42:14 +0100739struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
740 rxrpc_notify_rx_t);
Joe Perchesc1b12032013-10-18 13:48:25 -0700741int rxrpc_reject_call(struct rxrpc_sock *);
David Howells17926a72007-04-26 15:48:28 -0700742
743/*
David Howells0d81a512016-06-13 13:30:30 +0100744 * call_event.c
David Howells17926a72007-04-26 15:48:28 -0700745 */
David Howells9c7ad432016-09-23 13:50:40 +0100746void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
747 enum rxrpc_propose_ack_trace);
Joe Perchesc1b12032013-10-18 13:48:25 -0700748void rxrpc_process_call(struct work_struct *);
David Howells17926a72007-04-26 15:48:28 -0700749
David Howellsa158bdd2017-11-24 10:18:41 +0000750static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
751 unsigned long expire_at,
752 unsigned long now,
753 enum rxrpc_timer_trace why)
754{
755 trace_rxrpc_timer(call, why, now);
756 timer_reduce(&call->timer, expire_at);
757}
758
David Howells17926a72007-04-26 15:48:28 -0700759/*
David Howells0d81a512016-06-13 13:30:30 +0100760 * call_object.c
David Howells17926a72007-04-26 15:48:28 -0700761 */
David Howellsf5c17aa2016-08-30 09:49:28 +0100762extern const char *const rxrpc_call_states[];
763extern const char *const rxrpc_call_completions[];
David Howellsdad8aff2016-03-09 23:22:56 +0000764extern unsigned int rxrpc_max_call_lifetime;
David Howells17926a72007-04-26 15:48:28 -0700765extern struct kmem_cache *rxrpc_call_jar;
David Howells17926a72007-04-26 15:48:28 -0700766
David Howells2341e072016-06-09 23:02:51 +0100767struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
David Howellsa25e21f2018-03-27 23:03:00 +0100768struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
David Howells2341e072016-06-09 23:02:51 +0100769struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
David Howells19ffa012016-04-04 14:00:36 +0100770 struct rxrpc_conn_parameters *,
David Howells999b69f2016-06-17 15:42:35 +0100771 struct sockaddr_rxrpc *,
David Howellsa25e21f2018-03-27 23:03:00 +0100772 struct rxrpc_call_params *, gfp_t,
773 unsigned int);
David Howells248f2192016-09-08 11:10:12 +0100774void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
775 struct sk_buff *);
David Howells8d94aa32016-09-07 09:19:31 +0100776void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
Joe Perchesc1b12032013-10-18 13:48:25 -0700777void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
David Howells8d94aa32016-09-07 09:19:31 +0100778bool __rxrpc_queue_call(struct rxrpc_call *);
779bool rxrpc_queue_call(struct rxrpc_call *);
David Howellse34d4232016-08-30 09:49:29 +0100780void rxrpc_see_call(struct rxrpc_call *);
David Howellsfff724292016-09-07 14:34:21 +0100781void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
782void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
David Howells00e90712016-09-08 11:10:12 +0100783void rxrpc_cleanup_call(struct rxrpc_call *);
David Howells2baec2c2017-05-24 17:02:32 +0100784void rxrpc_destroy_all_calls(struct rxrpc_net *);
David Howells17926a72007-04-26 15:48:28 -0700785
David Howellsdabe5a72016-08-23 15:27:24 +0100786static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
787{
788 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
789}
790
791static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
792{
793 return !rxrpc_is_service_call(call);
794}
795
David Howells17926a72007-04-26 15:48:28 -0700796/*
David Howellsf5c17aa2016-08-30 09:49:28 +0100797 * Transition a call to the complete state.
798 */
799static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
800 enum rxrpc_call_completion compl,
801 u32 abort_code,
802 int error)
803{
804 if (call->state < RXRPC_CALL_COMPLETE) {
805 call->abort_code = abort_code;
806 call->error = error;
807 call->completion = compl,
808 call->state = RXRPC_CALL_COMPLETE;
David Howells1bae5d22018-03-27 23:08:20 +0100809 trace_rxrpc_call_complete(call);
David Howellsc0d058c2016-09-23 12:39:23 +0100810 wake_up(&call->waitq);
David Howellsf5c17aa2016-08-30 09:49:28 +0100811 return true;
812 }
813 return false;
814}
815
816static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
817 enum rxrpc_call_completion compl,
818 u32 abort_code,
819 int error)
820{
David Howellse8d6bbb2016-09-07 16:34:12 +0100821 bool ret;
David Howellsf5c17aa2016-08-30 09:49:28 +0100822
823 write_lock_bh(&call->state_lock);
824 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
825 write_unlock_bh(&call->state_lock);
826 return ret;
827}
828
829/*
830 * Record that a call successfully completed.
831 */
David Howellse8d6bbb2016-09-07 16:34:12 +0100832static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
David Howellsf5c17aa2016-08-30 09:49:28 +0100833{
David Howellse8d6bbb2016-09-07 16:34:12 +0100834 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
David Howellsf5c17aa2016-08-30 09:49:28 +0100835}
836
David Howellse8d6bbb2016-09-07 16:34:12 +0100837static inline bool rxrpc_call_completed(struct rxrpc_call *call)
David Howellsf5c17aa2016-08-30 09:49:28 +0100838{
David Howellse8d6bbb2016-09-07 16:34:12 +0100839 bool ret;
840
David Howellsf5c17aa2016-08-30 09:49:28 +0100841 write_lock_bh(&call->state_lock);
David Howellse8d6bbb2016-09-07 16:34:12 +0100842 ret = __rxrpc_call_completed(call);
David Howellsf5c17aa2016-08-30 09:49:28 +0100843 write_unlock_bh(&call->state_lock);
David Howellse8d6bbb2016-09-07 16:34:12 +0100844 return ret;
David Howellsf5c17aa2016-08-30 09:49:28 +0100845}
846
847/*
848 * Record that a call is locally aborted.
849 */
David Howells5a429762016-09-06 22:19:51 +0100850static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
851 rxrpc_seq_t seq,
David Howellsf5c17aa2016-08-30 09:49:28 +0100852 u32 abort_code, int error)
853{
David Howellsa25e21f2018-03-27 23:03:00 +0100854 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
David Howells5a429762016-09-06 22:19:51 +0100855 abort_code, error);
David Howells248f2192016-09-08 11:10:12 +0100856 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
857 abort_code, error);
David Howellsf5c17aa2016-08-30 09:49:28 +0100858}
859
David Howells5a429762016-09-06 22:19:51 +0100860static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
861 rxrpc_seq_t seq, u32 abort_code, int error)
David Howellsf5c17aa2016-08-30 09:49:28 +0100862{
863 bool ret;
864
865 write_lock_bh(&call->state_lock);
David Howells5a429762016-09-06 22:19:51 +0100866 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
David Howellsf5c17aa2016-08-30 09:49:28 +0100867 write_unlock_bh(&call->state_lock);
868 return ret;
869}
870
871/*
David Howellsfb46f6e2017-04-06 10:12:00 +0100872 * Abort a call due to a protocol error.
873 */
874static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
875 struct sk_buff *skb,
876 const char *eproto_why,
877 const char *why,
878 u32 abort_code)
879{
880 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
881
882 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
883 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
884}
885
886#define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
887 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
888 (abort_why), (abort_code))
889
890/*
David Howells4a3388c2016-04-04 14:00:37 +0100891 * conn_client.c
892 */
David Howells45025bc2016-08-24 07:30:52 +0100893extern unsigned int rxrpc_max_client_connections;
894extern unsigned int rxrpc_reap_client_connections;
David Howellsa158bdd2017-11-24 10:18:41 +0000895extern unsigned long rxrpc_conn_idle_client_expiry;
896extern unsigned long rxrpc_conn_idle_client_fast_expiry;
David Howells4a3388c2016-04-04 14:00:37 +0100897extern struct idr rxrpc_client_conn_ids;
898
David Howellseb9b9d22016-06-27 10:32:02 +0100899void rxrpc_destroy_client_conn_ids(void);
David Howells5e33a232018-10-05 14:05:34 +0100900int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
901 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
902 gfp_t);
David Howells45025bc2016-08-24 07:30:52 +0100903void rxrpc_expose_client_call(struct rxrpc_call *);
904void rxrpc_disconnect_client_call(struct rxrpc_call *);
905void rxrpc_put_client_conn(struct rxrpc_connection *);
David Howells2baec2c2017-05-24 17:02:32 +0100906void rxrpc_discard_expired_client_conns(struct work_struct *);
907void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
David Howells4a3388c2016-04-04 14:00:37 +0100908
909/*
David Howells0d81a512016-06-13 13:30:30 +0100910 * conn_event.c
911 */
912void rxrpc_process_connection(struct work_struct *);
David Howells0d81a512016-06-13 13:30:30 +0100913
914/*
915 * conn_object.c
David Howells17926a72007-04-26 15:48:28 -0700916 */
David Howellsdad8aff2016-03-09 23:22:56 +0000917extern unsigned int rxrpc_connection_expiry;
David Howellsf859ab62017-11-24 10:18:42 +0000918extern unsigned int rxrpc_closed_conn_expiry;
David Howells17926a72007-04-26 15:48:28 -0700919
David Howellsc6d2b8d2016-04-04 14:00:40 +0100920struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
David Howells8496af52016-07-01 07:51:50 +0100921struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
David Howells0099dc52018-09-27 15:13:09 +0100922 struct sk_buff *,
923 struct rxrpc_peer **);
David Howells45025bc2016-08-24 07:30:52 +0100924void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
David Howells999b69f2016-06-17 15:42:35 +0100925void rxrpc_disconnect_call(struct rxrpc_call *);
David Howells45025bc2016-08-24 07:30:52 +0100926void rxrpc_kill_connection(struct rxrpc_connection *);
David Howells363deea2016-09-17 10:49:14 +0100927bool rxrpc_queue_conn(struct rxrpc_connection *);
928void rxrpc_see_connection(struct rxrpc_connection *);
929void rxrpc_get_connection(struct rxrpc_connection *);
930struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
931void rxrpc_put_service_conn(struct rxrpc_connection *);
David Howells2baec2c2017-05-24 17:02:32 +0100932void rxrpc_service_connection_reaper(struct work_struct *);
933void rxrpc_destroy_all_connections(struct rxrpc_net *);
David Howells17926a72007-04-26 15:48:28 -0700934
David Howells19ffa012016-04-04 14:00:36 +0100935static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
936{
937 return conn->out_clientflag;
938}
939
940static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
941{
David Howellse8d70ce2016-06-30 12:16:21 +0100942 return !rxrpc_conn_is_client(conn);
David Howells19ffa012016-04-04 14:00:36 +0100943}
944
David Howellsf51b4482016-08-23 15:27:24 +0100945static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
946{
David Howells45025bc2016-08-24 07:30:52 +0100947 if (!conn)
948 return;
949
David Howells363deea2016-09-17 10:49:14 +0100950 if (rxrpc_conn_is_client(conn))
951 rxrpc_put_client_conn(conn);
952 else
953 rxrpc_put_service_conn(conn);
David Howells5acbee42016-06-27 10:32:02 +0100954}
955
David Howells3136ef42017-11-24 10:18:41 +0000956static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
957 unsigned long expire_at)
958{
959 timer_reduce(&conn->timer, expire_at);
960}
961
David Howells17926a72007-04-26 15:48:28 -0700962/*
David Howells7877a4a2016-04-04 14:00:40 +0100963 * conn_service.c
964 */
David Howells8496af52016-07-01 07:51:50 +0100965struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
966 struct sk_buff *);
David Howells2baec2c2017-05-24 17:02:32 +0100967struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
David Howells47229742017-06-05 14:30:49 +0100968void rxrpc_new_incoming_connection(struct rxrpc_sock *,
969 struct rxrpc_connection *, struct sk_buff *);
David Howells001c1122016-06-30 10:45:22 +0100970void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
David Howells7877a4a2016-04-04 14:00:40 +0100971
972/*
David Howells0d81a512016-06-13 13:30:30 +0100973 * input.c
David Howells17926a72007-04-26 15:48:28 -0700974 */
David Howells52719532018-10-04 11:10:51 +0100975int rxrpc_input_packet(struct sock *, struct sk_buff *);
David Howells17926a72007-04-26 15:48:28 -0700976
977/*
David Howells0d81a512016-06-13 13:30:30 +0100978 * insecure.c
David Howells17926a72007-04-26 15:48:28 -0700979 */
David Howells0d81a512016-06-13 13:30:30 +0100980extern const struct rxrpc_security rxrpc_no_security;
David Howells17926a72007-04-26 15:48:28 -0700981
982/*
David Howells0d81a512016-06-13 13:30:30 +0100983 * key.c
David Howells17926a72007-04-26 15:48:28 -0700984 */
985extern struct key_type key_type_rxrpc;
986extern struct key_type key_type_rxrpc_s;
987
Joe Perchesc1b12032013-10-18 13:48:25 -0700988int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
989int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
Baolin Wang10674a02017-08-29 10:15:40 +0100990int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
Joe Perchesc1b12032013-10-18 13:48:25 -0700991 u32);
David Howells17926a72007-04-26 15:48:28 -0700992
993/*
David Howells87563612016-04-04 14:00:34 +0100994 * local_event.c
995 */
David Howells4f95dd72016-04-04 14:00:35 +0100996extern void rxrpc_process_local_events(struct rxrpc_local *);
David Howells87563612016-04-04 14:00:34 +0100997
998/*
David Howells0d81a512016-06-13 13:30:30 +0100999 * local_object.c
David Howells17926a72007-04-26 15:48:28 -07001000 */
David Howells2baec2c2017-05-24 17:02:32 +01001001struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
David Howells09d2bf52018-03-30 21:05:28 +01001002struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
1003struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
1004void rxrpc_put_local(struct rxrpc_local *);
1005void rxrpc_queue_local(struct rxrpc_local *);
David Howells2baec2c2017-05-24 17:02:32 +01001006void rxrpc_destroy_all_locals(struct rxrpc_net *);
David Howellse0e4d822016-04-07 17:23:58 +01001007
1008/*
David Howells8e688d92016-04-07 17:23:16 +01001009 * misc.c
1010 */
David Howells0e119b42016-06-10 22:30:37 +01001011extern unsigned int rxrpc_max_backlog __read_mostly;
David Howellsa158bdd2017-11-24 10:18:41 +00001012extern unsigned long rxrpc_requested_ack_delay;
1013extern unsigned long rxrpc_soft_ack_delay;
1014extern unsigned long rxrpc_idle_ack_delay;
David Howells8e688d92016-04-07 17:23:16 +01001015extern unsigned int rxrpc_rx_window_size;
1016extern unsigned int rxrpc_rx_mtu;
1017extern unsigned int rxrpc_rx_jumbo_max;
David Howellsa158bdd2017-11-24 10:18:41 +00001018extern unsigned long rxrpc_resend_timeout;
David Howells8e688d92016-04-07 17:23:16 +01001019
David Howells8e688d92016-04-07 17:23:16 +01001020extern const s8 rxrpc_ack_priority[];
1021
David Howells8e688d92016-04-07 17:23:16 +01001022/*
David Howells2baec2c2017-05-24 17:02:32 +01001023 * net_ns.c
1024 */
1025extern unsigned int rxrpc_net_id;
1026extern struct pernet_operations rxrpc_net_ops;
1027
1028static inline struct rxrpc_net *rxrpc_net(struct net *net)
1029{
1030 return net_generic(net, rxrpc_net_id);
1031}
1032
1033/*
David Howells0d81a512016-06-13 13:30:30 +01001034 * output.c
1035 */
David Howellsbd1fdf82017-11-24 10:18:42 +00001036int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
David Howells26cb02a2016-10-06 08:11:49 +01001037int rxrpc_send_abort_packet(struct rxrpc_call *);
David Howellsa1767072016-09-29 22:37:15 +01001038int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
David Howells248f2192016-09-08 11:10:12 +01001039void rxrpc_reject_packets(struct rxrpc_local *);
David Howellsace45be2018-03-30 21:04:43 +01001040void rxrpc_send_keepalive(struct rxrpc_peer *);
David Howells0d81a512016-06-13 13:30:30 +01001041
1042/*
David Howellsabe89ef2016-04-04 14:00:32 +01001043 * peer_event.c
David Howells0d81a512016-06-13 13:30:30 +01001044 */
David Howellsabe89ef2016-04-04 14:00:32 +01001045void rxrpc_error_report(struct sock *);
David Howellscf1a6472016-09-22 00:41:53 +01001046void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1047 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
David Howellsace45be2018-03-30 21:04:43 +01001048void rxrpc_peer_keepalive_worker(struct work_struct *);
David Howells0d81a512016-06-13 13:30:30 +01001049
1050/*
1051 * peer_object.c
1052 */
David Howellsbe6e6702016-04-04 14:00:32 +01001053struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1054 const struct sockaddr_rxrpc *);
David Howells5e33a232018-10-05 14:05:34 +01001055struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
David Howellsbe6e6702016-04-04 14:00:32 +01001056 struct sockaddr_rxrpc *, gfp_t);
1057struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
David Howells5e33a232018-10-05 14:05:34 +01001058void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1059 struct rxrpc_peer *);
David Howells17226f12018-03-30 21:05:44 +01001060void rxrpc_destroy_all_peers(struct rxrpc_net *);
David Howells1159d4b2018-03-30 21:05:38 +01001061struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1062struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1063void rxrpc_put_peer(struct rxrpc_peer *);
David Howells0d81a512016-06-13 13:30:30 +01001064
1065/*
1066 * proc.c
1067 */
Christoph Hellwigc3506372018-04-10 19:42:55 +02001068extern const struct seq_operations rxrpc_call_seq_ops;
1069extern const struct seq_operations rxrpc_connection_seq_ops;
David Howellsbc0e7cf2018-10-15 11:31:03 +01001070extern const struct seq_operations rxrpc_peer_seq_ops;
David Howells0d81a512016-06-13 13:30:30 +01001071
1072/*
1073 * recvmsg.c
1074 */
David Howells248f2192016-09-08 11:10:12 +01001075void rxrpc_notify_socket(struct rxrpc_call *);
David Howells0d81a512016-06-13 13:30:30 +01001076int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1077
1078/*
David Howells648af7f2016-04-07 17:23:51 +01001079 * rxkad.c
1080 */
1081#ifdef CONFIG_RXKAD
1082extern const struct rxrpc_security rxkad;
1083#endif
1084
1085/*
David Howells0d81a512016-06-13 13:30:30 +01001086 * security.c
1087 */
1088int __init rxrpc_init_security(void);
1089void rxrpc_exit_security(void);
1090int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1091int rxrpc_init_server_conn_security(struct rxrpc_connection *);
David Howells71a17de2016-09-07 14:43:39 +01001092
David Howells0b58b8a2016-09-02 22:39:45 +01001093/*
1094 * sendmsg.c
1095 */
1096int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
David Howells0d81a512016-06-13 13:30:30 +01001097
1098/*
1099 * skbuff.c
1100 */
David Howellsd0016482016-08-30 20:42:14 +01001101void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
David Howells0d81a512016-06-13 13:30:30 +01001102void rxrpc_packet_destructor(struct sk_buff *);
David Howells71f3ca42016-09-17 10:49:14 +01001103void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1104void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1105void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1106void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
David Howellsdf844fd2016-08-23 15:27:24 +01001107void rxrpc_purge_queue(struct sk_buff_head *);
David Howells0d81a512016-06-13 13:30:30 +01001108
1109/*
David Howells5873c082014-02-07 18:58:44 +00001110 * sysctl.c
1111 */
1112#ifdef CONFIG_SYSCTL
1113extern int __init rxrpc_sysctl_init(void);
1114extern void rxrpc_sysctl_exit(void);
1115#else
1116static inline int __init rxrpc_sysctl_init(void) { return 0; }
1117static inline void rxrpc_sysctl_exit(void) {}
1118#endif
1119
1120/*
David Howellsbe6e6702016-04-04 14:00:32 +01001121 * utils.c
1122 */
David Howells5a790b72018-10-04 09:32:28 +01001123int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
David Howellsbe6e6702016-04-04 14:00:32 +01001124
David Howells248f2192016-09-08 11:10:12 +01001125static inline bool before(u32 seq1, u32 seq2)
1126{
1127 return (s32)(seq1 - seq2) < 0;
1128}
1129static inline bool before_eq(u32 seq1, u32 seq2)
1130{
1131 return (s32)(seq1 - seq2) <= 0;
1132}
1133static inline bool after(u32 seq1, u32 seq2)
1134{
1135 return (s32)(seq1 - seq2) > 0;
1136}
1137static inline bool after_eq(u32 seq1, u32 seq2)
1138{
1139 return (s32)(seq1 - seq2) >= 0;
1140}
1141
David Howellsbe6e6702016-04-04 14:00:32 +01001142/*
David Howells17926a72007-04-26 15:48:28 -07001143 * debug tracing
1144 */
Eric Dumazet95c96172012-04-15 05:58:06 +00001145extern unsigned int rxrpc_debug;
David Howells17926a72007-04-26 15:48:28 -07001146
1147#define dbgprintk(FMT,...) \
Sven Schnelle9f389f42008-04-03 10:45:30 +01001148 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -07001149
Harvey Harrison0dc47872008-03-05 20:47:47 -08001150#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1151#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -07001152#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1153#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1154#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1155
1156
1157#if defined(__KDEBUG)
1158#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1159#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1160#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1161#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1162#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1163
1164#elif defined(CONFIG_AF_RXRPC_DEBUG)
1165#define RXRPC_DEBUG_KENTER 0x01
1166#define RXRPC_DEBUG_KLEAVE 0x02
1167#define RXRPC_DEBUG_KDEBUG 0x04
1168#define RXRPC_DEBUG_KPROTO 0x08
1169#define RXRPC_DEBUG_KNET 0x10
1170
1171#define _enter(FMT,...) \
1172do { \
1173 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1174 kenter(FMT,##__VA_ARGS__); \
1175} while (0)
1176
1177#define _leave(FMT,...) \
1178do { \
1179 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1180 kleave(FMT,##__VA_ARGS__); \
1181} while (0)
1182
1183#define _debug(FMT,...) \
1184do { \
1185 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1186 kdebug(FMT,##__VA_ARGS__); \
1187} while (0)
1188
1189#define _proto(FMT,...) \
1190do { \
1191 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1192 kproto(FMT,##__VA_ARGS__); \
1193} while (0)
1194
1195#define _net(FMT,...) \
1196do { \
1197 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1198 knet(FMT,##__VA_ARGS__); \
1199} while (0)
1200
1201#else
David Howells12fdff32010-08-12 16:54:57 +01001202#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1203#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1204#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1205#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1206#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
David Howells17926a72007-04-26 15:48:28 -07001207#endif
1208
1209/*
1210 * debug assertion checking
1211 */
1212#if 1 // defined(__KDEBUGALL)
1213
1214#define ASSERT(X) \
1215do { \
1216 if (unlikely(!(X))) { \
Joe Perches9b6d5392016-06-02 12:08:52 -07001217 pr_err("Assertion failed\n"); \
David Howells17926a72007-04-26 15:48:28 -07001218 BUG(); \
1219 } \
David Howellsb4f13422016-03-04 15:56:19 +00001220} while (0)
David Howells17926a72007-04-26 15:48:28 -07001221
1222#define ASSERTCMP(X, OP, Y) \
1223do { \
David Howellscf132582016-09-08 11:10:11 +01001224 __typeof__(X) _x = (X); \
1225 __typeof__(Y) _y = (__typeof__(X))(Y); \
Joe Perches9b6d5392016-06-02 12:08:52 -07001226 if (unlikely(!(_x OP _y))) { \
David Howellscf132582016-09-08 11:10:11 +01001227 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1228 (unsigned long)_x, (unsigned long)_x, #OP, \
1229 (unsigned long)_y, (unsigned long)_y); \
David Howells17926a72007-04-26 15:48:28 -07001230 BUG(); \
1231 } \
David Howellsb4f13422016-03-04 15:56:19 +00001232} while (0)
David Howells17926a72007-04-26 15:48:28 -07001233
1234#define ASSERTIF(C, X) \
1235do { \
1236 if (unlikely((C) && !(X))) { \
Joe Perches9b6d5392016-06-02 12:08:52 -07001237 pr_err("Assertion failed\n"); \
David Howells17926a72007-04-26 15:48:28 -07001238 BUG(); \
1239 } \
David Howellsb4f13422016-03-04 15:56:19 +00001240} while (0)
David Howells17926a72007-04-26 15:48:28 -07001241
1242#define ASSERTIFCMP(C, X, OP, Y) \
1243do { \
David Howellscf132582016-09-08 11:10:11 +01001244 __typeof__(X) _x = (X); \
1245 __typeof__(Y) _y = (__typeof__(X))(Y); \
Joe Perches9b6d5392016-06-02 12:08:52 -07001246 if (unlikely((C) && !(_x OP _y))) { \
1247 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
David Howellscf132582016-09-08 11:10:11 +01001248 (unsigned long)_x, (unsigned long)_x, #OP, \
1249 (unsigned long)_y, (unsigned long)_y); \
David Howells17926a72007-04-26 15:48:28 -07001250 BUG(); \
1251 } \
David Howellsb4f13422016-03-04 15:56:19 +00001252} while (0)
David Howells17926a72007-04-26 15:48:28 -07001253
1254#else
1255
1256#define ASSERT(X) \
1257do { \
David Howellsb4f13422016-03-04 15:56:19 +00001258} while (0)
David Howells17926a72007-04-26 15:48:28 -07001259
1260#define ASSERTCMP(X, OP, Y) \
1261do { \
David Howellsb4f13422016-03-04 15:56:19 +00001262} while (0)
David Howells17926a72007-04-26 15:48:28 -07001263
1264#define ASSERTIF(C, X) \
1265do { \
David Howellsb4f13422016-03-04 15:56:19 +00001266} while (0)
David Howells17926a72007-04-26 15:48:28 -07001267
1268#define ASSERTIFCMP(C, X, OP, Y) \
1269do { \
David Howellsb4f13422016-03-04 15:56:19 +00001270} while (0)
David Howells17926a72007-04-26 15:48:28 -07001271
1272#endif /* __KDEBUGALL */