1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* AF_RXRPC internal definitions
3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/atomic.h>
9 #include <linux/seqlock.h>
10 #include <linux/win_minmax.h>
11 #include <net/net_namespace.h>
12 #include <net/netns/generic.h>
13 #include <net/sock.h>
14 #include <net/af_rxrpc.h>
15 #include <keys/rxrpc-type.h>
16 #include "protocol.h"
17
18 #define FCRYPT_BSIZE 8
19 struct rxrpc_crypt {
20 union {
21 u8 x[FCRYPT_BSIZE];
22 __be32 n[2];
23 };
24 } __attribute__((aligned(8)));
25
26 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
27 #define rxrpc_queue_delayed_work(WS,D) \
28 queue_delayed_work(rxrpc_workqueue, (WS), (D))
29
30 struct key_preparsed_payload;
31 struct rxrpc_connection;
32
33 /*
34 * Mark applied to socket buffers in skb->mark. skb->priority is used
35 * to pass supplementary information.
36 */
37 enum rxrpc_skb_mark {
38 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
39 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
40 };
41
42 /*
43 * sk_state for RxRPC sockets
44 */
45 enum {
46 RXRPC_UNBOUND = 0,
47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
48 RXRPC_CLIENT_BOUND, /* client local address bound */
49 RXRPC_SERVER_BOUND, /* server local address bound */
50 RXRPC_SERVER_BOUND2, /* second server local address bound */
51 RXRPC_SERVER_LISTENING, /* server listening for connections */
52 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
53 RXRPC_CLOSE, /* socket is being closed */
54 };
55
56 /*
57 * Per-network namespace data.
58 */
59 struct rxrpc_net {
60 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
61 u32 epoch; /* Local epoch for detecting local-end reset */
62 struct list_head calls; /* List of calls active in this namespace */
63 spinlock_t call_lock; /* Lock for ->calls */
64 atomic_t nr_calls; /* Count of allocated calls */
65
66 atomic_t nr_conns;
67 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
68 struct list_head service_conns; /* Service conns in this namespace */
69 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
70 struct work_struct service_conn_reaper;
71 struct timer_list service_conn_reap_timer;
72
73 bool live;
74
75 bool kill_all_client_conns;
76 atomic_t nr_client_conns;
77 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
78 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
79 struct list_head idle_client_conns;
80 struct work_struct client_conn_reaper;
81 struct timer_list client_conn_reap_timer;
82
83 struct hlist_head local_endpoints;
84 struct mutex local_mutex; /* Lock for ->local_endpoints */
85
86 DECLARE_HASHTABLE (peer_hash, 10);
87 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
88
89 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
90 u8 peer_keepalive_cursor;
91 time64_t peer_keepalive_base;
92 struct list_head peer_keepalive[32];
93 struct list_head peer_keepalive_new;
94 struct timer_list peer_keepalive_timer;
95 struct work_struct peer_keepalive_work;
96 };
97
98 /*
99 * Service backlog preallocation.
100 *
101 * This contains circular buffers of preallocated peers, connections and calls
102 * for incoming service calls and their head and tail pointers. This allows
103 * calls to be set up in the data_ready handler, thereby avoiding the need to
104 * shuffle packets around so much.
105 */
106 struct rxrpc_backlog {
107 unsigned short peer_backlog_head;
108 unsigned short peer_backlog_tail;
109 unsigned short conn_backlog_head;
110 unsigned short conn_backlog_tail;
111 unsigned short call_backlog_head;
112 unsigned short call_backlog_tail;
113 #define RXRPC_BACKLOG_MAX 32
114 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
115 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
116 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
117 };
118
119 /*
120 * RxRPC socket definition
121 */
122 struct rxrpc_sock {
123 /* WARNING: sk has to be the first member */
124 struct sock sk;
125 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
126 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
127 struct rxrpc_local *local; /* local endpoint */
128 struct rxrpc_backlog *backlog; /* Preallocation for services */
129 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
130 struct list_head sock_calls; /* List of calls owned by this socket */
131 struct list_head to_be_accepted; /* calls awaiting acceptance */
132 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
133 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
134 struct key *key; /* security for this socket */
135 struct key *securities; /* list of server security descriptors */
136 struct rb_root calls; /* User ID -> call mapping */
137 unsigned long flags;
138 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
139 rwlock_t call_lock; /* lock for calls */
140 u32 min_sec_level; /* minimum security level */
141 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
142 bool exclusive; /* Exclusive connection for a client socket */
143 u16 second_service; /* Additional service bound to the endpoint */
144 struct {
145 /* Service upgrade information */
146 u16 from; /* Service ID to upgrade (if not 0) */
147 u16 to; /* service ID to upgrade to */
148 } service_upgrade;
149 sa_family_t family; /* Protocol family created with */
150 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
151 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
152 };
153
154 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
155
156 /*
157 * CPU-byteorder normalised Rx packet header.
158 */
159 struct rxrpc_host_header {
160 u32 epoch; /* client boot timestamp */
161 u32 cid; /* connection and channel ID */
162 u32 callNumber; /* call ID (0 for connection-level packets) */
163 u32 seq; /* sequence number of pkt in call stream */
164 u32 serial; /* serial number of pkt sent to network */
165 u8 type; /* packet type */
166 u8 flags; /* packet flags */
167 u8 userStatus; /* app-layer defined status */
168 u8 securityIndex; /* security protocol ID */
169 union {
170 u16 _rsvd; /* reserved */
171 u16 cksum; /* kerberos security checksum */
172 };
173 u16 serviceId; /* service ID */
174 } __packed;
175
176 /*
177 * RxRPC socket buffer private variables
178 * - max 48 bytes (struct sk_buff::cb)
179 */
180 struct rxrpc_skb_priv {
181 atomic_t nr_ring_pins; /* Number of rxtx ring pins */
182 u8 nr_subpackets; /* Number of subpackets */
183 u8 rx_flags; /* Received packet flags */
184 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */
185 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */
186 union {
187 int remain; /* amount of space remaining for next write */
188
189 /* List of requested ACKs on subpackets */
190 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) /
191 BITS_PER_LONG];
192 };
193
194 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
195 };
196
197 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
198
199 /*
200 * RxRPC security module interface
201 */
202 struct rxrpc_security {
203 const char *name; /* name of this service */
204 u8 security_index; /* security type provided */
205 u32 no_key_abort; /* Abort code indicating no key */
206
207 /* Initialise a security service */
208 int (*init)(void);
209
210 /* Clean up a security service */
211 void (*exit)(void);
212
213 /* Parse the information from a server key */
214 int (*preparse_server_key)(struct key_preparsed_payload *);
215
216 /* Clean up the preparse buffer after parsing a server key */
217 void (*free_preparse_server_key)(struct key_preparsed_payload *);
218
219 /* Destroy the payload of a server key */
220 void (*destroy_server_key)(struct key *);
221
222 /* Describe a server key */
223 void (*describe_server_key)(const struct key *, struct seq_file *);
224
225 /* initialise a connection's security */
226 int (*init_connection_security)(struct rxrpc_connection *,
227 struct rxrpc_key_token *);
228
229 /* Work out how much data we can store in a packet, given an estimate
230 * of the amount of data remaining.
231 */
232 int (*how_much_data)(struct rxrpc_call *, size_t,
233 size_t *, size_t *, size_t *);
234
235 /* impose security on a packet */
236 int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t);
237
238 /* verify the security on a received packet */
239 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
240 unsigned int, unsigned int, rxrpc_seq_t, u16);
241
242 /* Free crypto request on a call */
243 void (*free_call_crypto)(struct rxrpc_call *);
244
245 /* Locate the data in a received packet that has been verified. */
246 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
247 unsigned int *, unsigned int *);
248
249 /* issue a challenge */
250 int (*issue_challenge)(struct rxrpc_connection *);
251
252 /* respond to a challenge */
253 int (*respond_to_challenge)(struct rxrpc_connection *,
254 struct sk_buff *,
255 u32 *);
256
257 /* verify a response */
258 int (*verify_response)(struct rxrpc_connection *,
259 struct sk_buff *,
260 u32 *);
261
262 /* clear connection security */
263 void (*clear)(struct rxrpc_connection *);
264 };
265
266 /*
267 * RxRPC local transport endpoint description
268 * - owned by a single AF_RXRPC socket
269 * - pointed to by transport socket struct sk_user_data
270 */
271 struct rxrpc_local {
272 struct rcu_head rcu;
273 atomic_t active_users; /* Number of users of the local endpoint */
274 refcount_t ref; /* Number of references to the structure */
275 struct rxrpc_net *rxnet; /* The network ns in which this resides */
276 struct hlist_node link;
277 struct socket *socket; /* my UDP socket */
278 struct work_struct processor;
279 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
280 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
281 struct sk_buff_head reject_queue; /* packets awaiting rejection */
282 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
283 struct rb_root client_bundles; /* Client connection bundles by socket params */
284 spinlock_t client_bundles_lock; /* Lock for client_bundles */
285 spinlock_t lock; /* access lock */
286 rwlock_t services_lock; /* lock for services list */
287 int debug_id; /* debug ID for printks */
288 bool dead;
289 bool service_closed; /* Service socket closed */
290 struct sockaddr_rxrpc srx; /* local address */
291 };
292
293 /*
294 * RxRPC remote transport endpoint definition
295 * - matched by local endpoint, remote port, address and protocol type
296 */
297 struct rxrpc_peer {
298 struct rcu_head rcu; /* This must be first */
299 refcount_t ref;
300 unsigned long hash_key;
301 struct hlist_node hash_link;
302 struct rxrpc_local *local;
303 struct hlist_head error_targets; /* targets for net error distribution */
304 struct rb_root service_conns; /* Service connections */
305 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
306 time64_t last_tx_at; /* Last time packet sent here */
307 seqlock_t service_conn_lock;
308 spinlock_t lock; /* access lock */
309 unsigned int if_mtu; /* interface MTU for this peer */
310 unsigned int mtu; /* network MTU for this peer */
311 unsigned int maxdata; /* data size (MTU - hdrsize) */
312 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
313 int debug_id; /* debug ID for printks */
314 struct sockaddr_rxrpc srx; /* remote address */
315
316 /* calculated RTT cache */
317 #define RXRPC_RTT_CACHE_SIZE 32
318 spinlock_t rtt_input_lock; /* RTT lock for input routine */
319 ktime_t rtt_last_req; /* Time of last RTT request */
320 unsigned int rtt_count; /* Number of samples we've got */
321
322 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
323 u32 mdev_us; /* medium deviation */
324 u32 mdev_max_us; /* maximal mdev for the last rtt period */
325 u32 rttvar_us; /* smoothed mdev_max */
326 u32 rto_j; /* Retransmission timeout in jiffies */
327 u8 backoff; /* Backoff timeout */
328
329 u8 cong_cwnd; /* Congestion window size */
330 };
331
332 /*
333 * Keys for matching a connection.
334 */
335 struct rxrpc_conn_proto {
336 union {
337 struct {
338 u32 epoch; /* epoch of this connection */
339 u32 cid; /* connection ID */
340 };
341 u64 index_key;
342 };
343 };
344
345 struct rxrpc_conn_parameters {
346 struct rxrpc_local *local; /* Representation of local endpoint */
347 struct rxrpc_peer *peer; /* Remote endpoint */
348 struct key *key; /* Security details */
349 bool exclusive; /* T if conn is exclusive */
350 bool upgrade; /* T if service ID can be upgraded */
351 u16 service_id; /* Service ID for this connection */
352 u32 security_level; /* Security level selected */
353 };
354
355 /*
356 * Bits in the connection flags.
357 */
358 enum rxrpc_conn_flag {
359 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
360 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
361 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
362 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
363 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
364 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
365 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
366 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
367 };
368
369 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
370 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
371 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
372 (1UL << RXRPC_CONN_FINAL_ACK_3))
373
374 /*
375 * Events that can be raised upon a connection.
376 */
377 enum rxrpc_conn_event {
378 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
379 };
380
381 /*
382 * The connection protocol state.
383 */
384 enum rxrpc_conn_proto_state {
385 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
386 RXRPC_CONN_CLIENT, /* Client connection */
387 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
388 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
389 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
390 RXRPC_CONN_SERVICE, /* Service secured connection */
391 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
392 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
393 RXRPC_CONN__NR_STATES
394 };
395
396 /*
397 * RxRPC client connection bundle.
398 */
399 struct rxrpc_bundle {
400 struct rxrpc_conn_parameters params;
401 refcount_t ref;
402 atomic_t active; /* Number of active users */
403 unsigned int debug_id;
404 bool try_upgrade; /* True if the bundle is attempting upgrade */
405 bool alloc_conn; /* True if someone's getting a conn */
406 short alloc_error; /* Error from last conn allocation */
407 spinlock_t channel_lock;
408 struct rb_node local_node; /* Node in local->client_conns */
409 struct list_head waiting_calls; /* Calls waiting for channels */
410 unsigned long avail_chans; /* Mask of available channels */
411 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
412 };
413
414 /*
415 * RxRPC connection definition
416 * - matched by { local, peer, epoch, conn_id, direction }
417 * - each connection can only handle four simultaneous calls
418 */
419 struct rxrpc_connection {
420 struct rxrpc_conn_proto proto;
421 struct rxrpc_conn_parameters params;
422
423 refcount_t ref;
424 struct rcu_head rcu;
425 struct list_head cache_link;
426
427 unsigned char act_chans; /* Mask of active channels */
428 struct rxrpc_channel {
429 unsigned long final_ack_at; /* Time at which to issue final ACK */
430 struct rxrpc_call __rcu *call; /* Active call */
431 unsigned int call_debug_id; /* call->debug_id */
432 u32 call_id; /* ID of current call */
433 u32 call_counter; /* Call ID counter */
434 u32 last_call; /* ID of last call */
435 u8 last_type; /* Type of last packet */
436 union {
437 u32 last_seq;
438 u32 last_abort;
439 };
440 } channels[RXRPC_MAXCALLS];
441
442 struct timer_list timer; /* Conn event timer */
443 struct work_struct processor; /* connection event processor */
444 struct rxrpc_bundle *bundle; /* Client connection bundle */
445 struct rb_node service_node; /* Node in peer->service_conns */
446 struct list_head proc_link; /* link in procfs list */
447 struct list_head link; /* link in master connection list */
448 struct sk_buff_head rx_queue; /* received conn-level packets */
449
450 const struct rxrpc_security *security; /* applied security module */
451 union {
452 struct {
453 struct crypto_sync_skcipher *cipher; /* encryption handle */
454 struct rxrpc_crypt csum_iv; /* packet checksum base */
455 u32 nonce; /* response re-use preventer */
456 } rxkad;
457 };
458 unsigned long flags;
459 unsigned long events;
460 unsigned long idle_timestamp; /* Time at which last became idle */
461 spinlock_t state_lock; /* state-change lock */
462 enum rxrpc_conn_proto_state state; /* current state of connection */
463 u32 abort_code; /* Abort code of connection abort */
464 int debug_id; /* debug ID for printks */
465 atomic_t serial; /* packet serial number counter */
466 unsigned int hi_serial; /* highest serial number received */
467 u32 service_id; /* Service ID, possibly upgraded */
468 u8 security_ix; /* security type */
469 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
470 u8 bundle_shift; /* Index into bundle->avail_chans */
471 short error; /* Local error code */
472 };
473
rxrpc_to_server(const struct rxrpc_skb_priv * sp)474 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
475 {
476 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
477 }
478
rxrpc_to_client(const struct rxrpc_skb_priv * sp)479 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
480 {
481 return !rxrpc_to_server(sp);
482 }
483
484 /*
485 * Flags in call->flags.
486 */
487 enum rxrpc_call_flag {
488 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
489 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
490 RXRPC_CALL_IS_SERVICE, /* Call is service call */
491 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
492 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
493 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
494 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
495 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
496 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
497 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
498 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
499 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
500 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
501 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
502 };
503
504 /*
505 * Events that can be raised on a call.
506 */
507 enum rxrpc_call_event {
508 RXRPC_CALL_EV_ACK, /* need to generate ACK */
509 RXRPC_CALL_EV_ABORT, /* need to generate abort */
510 RXRPC_CALL_EV_RESEND, /* Tx resend required */
511 RXRPC_CALL_EV_PING, /* Ping send required */
512 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
513 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
514 };
515
516 /*
517 * The states that a call can be in.
518 */
519 enum rxrpc_call_state {
520 RXRPC_CALL_UNINITIALISED,
521 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
522 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
523 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
524 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
525 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
526 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
527 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
528 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
529 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
530 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
531 RXRPC_CALL_COMPLETE, /* - call complete */
532 NR__RXRPC_CALL_STATES
533 };
534
535 /*
536 * Call completion condition (state == RXRPC_CALL_COMPLETE).
537 */
538 enum rxrpc_call_completion {
539 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
540 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
541 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
542 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
543 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
544 NR__RXRPC_CALL_COMPLETIONS
545 };
546
547 /*
548 * Call Tx congestion management modes.
549 */
550 enum rxrpc_congest_mode {
551 RXRPC_CALL_SLOW_START,
552 RXRPC_CALL_CONGEST_AVOIDANCE,
553 RXRPC_CALL_PACKET_LOSS,
554 RXRPC_CALL_FAST_RETRANSMIT,
555 NR__RXRPC_CONGEST_MODES
556 };
557
558 /*
559 * RxRPC call definition
560 * - matched by { connection, call_id }
561 */
562 struct rxrpc_call {
563 struct rcu_head rcu;
564 struct rxrpc_connection *conn; /* connection carrying call */
565 struct rxrpc_peer *peer; /* Peer record for remote address */
566 struct rxrpc_sock __rcu *socket; /* socket responsible */
567 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
568 const struct rxrpc_security *security; /* applied security module */
569 struct mutex user_mutex; /* User access mutex */
570 unsigned long ack_at; /* When deferred ACK needs to happen */
571 unsigned long ack_lost_at; /* When ACK is figured as lost */
572 unsigned long resend_at; /* When next resend needs to happen */
573 unsigned long ping_at; /* When next to send a ping */
574 unsigned long keepalive_at; /* When next to send a keepalive ping */
575 unsigned long expect_rx_by; /* When we expect to get a packet by */
576 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
577 unsigned long expect_term_by; /* When we expect call termination by */
578 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
579 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
580 struct skcipher_request *cipher_req; /* Packet cipher request buffer */
581 struct timer_list timer; /* Combined event timer */
582 struct work_struct processor; /* Event processor */
583 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
584 struct list_head link; /* link in master call list */
585 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
586 struct hlist_node error_link; /* link in error distribution list */
587 struct list_head accept_link; /* Link in rx->acceptq */
588 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
589 struct list_head sock_link; /* Link in rx->sock_calls */
590 struct rb_node sock_node; /* Node in rx->calls */
591 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
592 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
593 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
594 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
595 unsigned long user_call_ID; /* user-defined call ID */
596 unsigned long flags;
597 unsigned long events;
598 spinlock_t lock;
599 spinlock_t notify_lock; /* Kernel notification lock */
600 rwlock_t state_lock; /* lock for state transition */
601 u32 abort_code; /* Local/remote abort code */
602 int error; /* Local error incurred */
603 enum rxrpc_call_state state; /* current state of call */
604 enum rxrpc_call_completion completion; /* Call completion condition */
605 refcount_t ref;
606 u16 service_id; /* service ID */
607 u8 security_ix; /* Security type */
608 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
609 u32 call_id; /* call ID on connection */
610 u32 cid; /* connection ID plus channel index */
611 int debug_id; /* debug ID for printks */
612 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
613 unsigned short rx_pkt_len; /* Current recvmsg packet len */
614 bool rx_pkt_last; /* Current recvmsg packet is last */
615
616 /* Rx/Tx circular buffer, depending on phase.
617 *
618 * In the Rx phase, packets are annotated with 0 or the number of the
619 * segment of a jumbo packet each buffer refers to. There can be up to
620 * 47 segments in a maximum-size UDP packet.
621 *
622 * In the Tx phase, packets are annotated with which buffers have been
623 * acked.
624 */
625 #define RXRPC_RXTX_BUFF_SIZE 64
626 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
627 #define RXRPC_INIT_RX_WINDOW_SIZE 63
628 struct sk_buff **rxtx_buffer;
629 u8 *rxtx_annotations;
630 #define RXRPC_TX_ANNO_ACK 0
631 #define RXRPC_TX_ANNO_UNACK 1
632 #define RXRPC_TX_ANNO_NAK 2
633 #define RXRPC_TX_ANNO_RETRANS 3
634 #define RXRPC_TX_ANNO_MASK 0x03
635 #define RXRPC_TX_ANNO_LAST 0x04
636 #define RXRPC_TX_ANNO_RESENT 0x08
637
638 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */
639 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
640 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
641 * not hard-ACK'd packet follows this.
642 */
643 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
644 u16 tx_backoff; /* Delay to insert due to Tx failure */
645
646 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
647 * is fixed, we keep these numbers in terms of segments (ie. DATA
648 * packets) rather than bytes.
649 */
650 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
651 u8 cong_cwnd; /* Congestion window size */
652 u8 cong_extra; /* Extra to send for congestion management */
653 u8 cong_ssthresh; /* Slow-start threshold */
654 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
655 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
656 u8 cong_cumul_acks; /* Cumulative ACK count */
657 ktime_t cong_tstamp; /* Last time cwnd was changed */
658
659 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
660 * consumed packet follows this.
661 */
662 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
663 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
664 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
665 u8 rx_winsize; /* Size of Rx window */
666 u8 tx_winsize; /* Maximum size of Tx window */
667 bool tx_phase; /* T if transmission phase, F if receive phase */
668 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
669
670 spinlock_t input_lock; /* Lock for packet input to this call */
671
672 /* Receive-phase ACK management (ACKs we send). */
673 u8 ackr_reason; /* reason to ACK */
674 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
675 rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */
676 atomic_t ackr_nr_unacked; /* Number of unacked packets */
677 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
678
679 /* RTT management */
680 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
681 ktime_t rtt_sent_at[4]; /* Time packet sent */
682 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
683 * Mask of pending samples in 8-11 */
684 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
685 #define RXRPC_CALL_RTT_PEND_SHIFT 8
686
687 /* Transmission-phase ACK management (ACKs we've received). */
688 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
689 rxrpc_seq_t acks_first_seq; /* first sequence number received */
690 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
691 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
692 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
693 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
694 };
695
696 /*
697 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
698 */
699 struct rxrpc_ack_summary {
700 u8 ack_reason;
701 u8 nr_acks; /* Number of ACKs in packet */
702 u8 nr_nacks; /* Number of NACKs in packet */
703 u8 nr_new_acks; /* Number of new ACKs in packet */
704 u8 nr_new_nacks; /* Number of new NACKs in packet */
705 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
706 bool new_low_nack; /* T if new low NACK found */
707 bool retrans_timeo; /* T if reTx due to timeout happened */
708 u8 flight_size; /* Number of unreceived transmissions */
709 /* Place to stash values for tracing */
710 enum rxrpc_congest_mode mode:8;
711 u8 cwnd;
712 u8 ssthresh;
713 u8 dup_acks;
714 u8 cumulative_acks;
715 };
716
717 /*
718 * sendmsg() cmsg-specified parameters.
719 */
720 enum rxrpc_command {
721 RXRPC_CMD_SEND_DATA, /* send data message */
722 RXRPC_CMD_SEND_ABORT, /* request abort generation */
723 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
724 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
725 };
726
727 struct rxrpc_call_params {
728 s64 tx_total_len; /* Total Tx data length (if send data) */
729 unsigned long user_call_ID; /* User's call ID */
730 struct {
731 u32 hard; /* Maximum lifetime (sec) */
732 u32 idle; /* Max time since last data packet (msec) */
733 u32 normal; /* Max time since last call packet (msec) */
734 } timeouts;
735 u8 nr_timeouts; /* Number of timeouts specified */
736 bool kernel; /* T if kernel is making the call */
737 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
738 };
739
740 struct rxrpc_send_params {
741 struct rxrpc_call_params call;
742 u32 abort_code; /* Abort code to Tx (if abort) */
743 enum rxrpc_command command : 8; /* The command to implement */
744 bool exclusive; /* Shared or exclusive call */
745 bool upgrade; /* If the connection is upgradeable */
746 };
747
748 #include <trace/events/rxrpc.h>
749
750 /*
751 * af_rxrpc.c
752 */
753 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
754 extern struct workqueue_struct *rxrpc_workqueue;
755
756 /*
757 * call_accept.c
758 */
759 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
760 void rxrpc_discard_prealloc(struct rxrpc_sock *);
761 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
762 struct rxrpc_sock *,
763 struct sk_buff *);
764 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
765 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
766
767 /*
768 * call_event.c
769 */
770 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool,
771 enum rxrpc_propose_ack_trace);
772 void rxrpc_process_call(struct work_struct *);
773
774 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
775 unsigned long expire_at,
776 unsigned long now,
777 enum rxrpc_timer_trace why);
778
779 void rxrpc_delete_call_timer(struct rxrpc_call *call);
780
781 /*
782 * call_object.c
783 */
784 extern const char *const rxrpc_call_states[];
785 extern const char *const rxrpc_call_completions[];
786 extern struct kmem_cache *rxrpc_call_jar;
787
788 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
789 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
790 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
791 struct rxrpc_conn_parameters *,
792 struct sockaddr_rxrpc *,
793 struct rxrpc_call_params *, gfp_t,
794 unsigned int);
795 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
796 struct sk_buff *);
797 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
798 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
799 bool __rxrpc_queue_call(struct rxrpc_call *);
800 bool rxrpc_queue_call(struct rxrpc_call *);
801 void rxrpc_see_call(struct rxrpc_call *);
802 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op);
803 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
804 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
805 void rxrpc_cleanup_call(struct rxrpc_call *);
806 void rxrpc_destroy_all_calls(struct rxrpc_net *);
807
rxrpc_is_service_call(const struct rxrpc_call * call)808 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
809 {
810 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
811 }
812
rxrpc_is_client_call(const struct rxrpc_call * call)813 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
814 {
815 return !rxrpc_is_service_call(call);
816 }
817
818 /*
819 * conn_client.c
820 */
821 extern unsigned int rxrpc_reap_client_connections;
822 extern unsigned long rxrpc_conn_idle_client_expiry;
823 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
824 extern struct idr rxrpc_client_conn_ids;
825
826 void rxrpc_destroy_client_conn_ids(void);
827 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *);
828 void rxrpc_put_bundle(struct rxrpc_bundle *);
829 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
830 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
831 gfp_t);
832 void rxrpc_expose_client_call(struct rxrpc_call *);
833 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
834 void rxrpc_put_client_conn(struct rxrpc_connection *);
835 void rxrpc_discard_expired_client_conns(struct work_struct *);
836 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
837 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
838
839 /*
840 * conn_event.c
841 */
842 void rxrpc_process_connection(struct work_struct *);
843 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
844
845 /*
846 * conn_object.c
847 */
848 extern unsigned int rxrpc_connection_expiry;
849 extern unsigned int rxrpc_closed_conn_expiry;
850
851 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
852 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
853 struct sk_buff *,
854 struct rxrpc_peer **);
855 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
856 void rxrpc_disconnect_call(struct rxrpc_call *);
857 void rxrpc_kill_connection(struct rxrpc_connection *);
858 bool rxrpc_queue_conn(struct rxrpc_connection *);
859 void rxrpc_see_connection(struct rxrpc_connection *);
860 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *);
861 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
862 void rxrpc_put_service_conn(struct rxrpc_connection *);
863 void rxrpc_service_connection_reaper(struct work_struct *);
864 void rxrpc_destroy_all_connections(struct rxrpc_net *);
865
rxrpc_conn_is_client(const struct rxrpc_connection * conn)866 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
867 {
868 return conn->out_clientflag;
869 }
870
rxrpc_conn_is_service(const struct rxrpc_connection * conn)871 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
872 {
873 return !rxrpc_conn_is_client(conn);
874 }
875
rxrpc_put_connection(struct rxrpc_connection * conn)876 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
877 {
878 if (!conn)
879 return;
880
881 if (rxrpc_conn_is_client(conn))
882 rxrpc_put_client_conn(conn);
883 else
884 rxrpc_put_service_conn(conn);
885 }
886
rxrpc_reduce_conn_timer(struct rxrpc_connection * conn,unsigned long expire_at)887 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
888 unsigned long expire_at)
889 {
890 timer_reduce(&conn->timer, expire_at);
891 }
892
893 /*
894 * conn_service.c
895 */
896 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
897 struct sk_buff *);
898 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
899 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
900 const struct rxrpc_security *, struct sk_buff *);
901 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
902
903 /*
904 * input.c
905 */
906 int rxrpc_input_packet(struct sock *, struct sk_buff *);
907
908 /*
909 * insecure.c
910 */
911 extern const struct rxrpc_security rxrpc_no_security;
912
913 /*
914 * key.c
915 */
916 extern struct key_type key_type_rxrpc;
917
918 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
919 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
920 u32);
921
922 /*
923 * local_event.c
924 */
925 extern void rxrpc_process_local_events(struct rxrpc_local *);
926
927 /*
928 * local_object.c
929 */
930 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
931 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
932 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
933 void rxrpc_put_local(struct rxrpc_local *);
934 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
935 void rxrpc_unuse_local(struct rxrpc_local *);
936 void rxrpc_queue_local(struct rxrpc_local *);
937 void rxrpc_destroy_all_locals(struct rxrpc_net *);
938
__rxrpc_unuse_local(struct rxrpc_local * local)939 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local)
940 {
941 return atomic_dec_return(&local->active_users) == 0;
942 }
943
__rxrpc_use_local(struct rxrpc_local * local)944 static inline bool __rxrpc_use_local(struct rxrpc_local *local)
945 {
946 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0;
947 }
948
949 /*
950 * misc.c
951 */
952 extern unsigned int rxrpc_max_backlog __read_mostly;
953 extern unsigned long rxrpc_requested_ack_delay;
954 extern unsigned long rxrpc_soft_ack_delay;
955 extern unsigned long rxrpc_idle_ack_delay;
956 extern unsigned int rxrpc_rx_window_size;
957 extern unsigned int rxrpc_rx_mtu;
958 extern unsigned int rxrpc_rx_jumbo_max;
959
960 extern const s8 rxrpc_ack_priority[];
961
962 /*
963 * net_ns.c
964 */
965 extern unsigned int rxrpc_net_id;
966 extern struct pernet_operations rxrpc_net_ops;
967
rxrpc_net(struct net * net)968 static inline struct rxrpc_net *rxrpc_net(struct net *net)
969 {
970 return net_generic(net, rxrpc_net_id);
971 }
972
973 /*
974 * output.c
975 */
976 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
977 int rxrpc_send_abort_packet(struct rxrpc_call *);
978 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
979 void rxrpc_reject_packets(struct rxrpc_local *);
980 void rxrpc_send_keepalive(struct rxrpc_peer *);
981
982 /*
983 * peer_event.c
984 */
985 void rxrpc_encap_err_rcv(struct sock *sk, struct sk_buff *skb, unsigned int udp_offset);
986 void rxrpc_error_report(struct sock *);
987 void rxrpc_peer_keepalive_worker(struct work_struct *);
988
989 /*
990 * peer_object.c
991 */
992 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
993 const struct sockaddr_rxrpc *);
994 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
995 struct sockaddr_rxrpc *, gfp_t);
996 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
997 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
998 struct rxrpc_peer *);
999 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1000 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1001 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1002 void rxrpc_put_peer(struct rxrpc_peer *);
1003 void rxrpc_put_peer_locked(struct rxrpc_peer *);
1004
1005 /*
1006 * proc.c
1007 */
1008 extern const struct seq_operations rxrpc_call_seq_ops;
1009 extern const struct seq_operations rxrpc_connection_seq_ops;
1010 extern const struct seq_operations rxrpc_peer_seq_ops;
1011 extern const struct seq_operations rxrpc_local_seq_ops;
1012
1013 /*
1014 * recvmsg.c
1015 */
1016 void rxrpc_notify_socket(struct rxrpc_call *);
1017 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1018 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1019 bool __rxrpc_call_completed(struct rxrpc_call *);
1020 bool rxrpc_call_completed(struct rxrpc_call *);
1021 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1022 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1023 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1024
1025 /*
1026 * Abort a call due to a protocol error.
1027 */
__rxrpc_abort_eproto(struct rxrpc_call * call,struct sk_buff * skb,const char * eproto_why,const char * why,u32 abort_code)1028 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1029 struct sk_buff *skb,
1030 const char *eproto_why,
1031 const char *why,
1032 u32 abort_code)
1033 {
1034 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1035
1036 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1037 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1038 }
1039
1040 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1041 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1042 (abort_why), (abort_code))
1043
1044 /*
1045 * rtt.c
1046 */
1047 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1048 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1049 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1050 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1051
1052 /*
1053 * rxkad.c
1054 */
1055 #ifdef CONFIG_RXKAD
1056 extern const struct rxrpc_security rxkad;
1057 #endif
1058
1059 /*
1060 * security.c
1061 */
1062 int __init rxrpc_init_security(void);
1063 const struct rxrpc_security *rxrpc_security_lookup(u8);
1064 void rxrpc_exit_security(void);
1065 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1066 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1067 struct sk_buff *);
1068 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1069 struct sk_buff *, u32, u32);
1070
1071 /*
1072 * sendmsg.c
1073 */
1074 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1075
1076 /*
1077 * server_key.c
1078 */
1079 extern struct key_type key_type_rxrpc_s;
1080
1081 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1082
1083 /*
1084 * skbuff.c
1085 */
1086 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1087 void rxrpc_packet_destructor(struct sk_buff *);
1088 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1089 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1090 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1091 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1092 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1093 void rxrpc_purge_queue(struct sk_buff_head *);
1094
1095 /*
1096 * sysctl.c
1097 */
1098 #ifdef CONFIG_SYSCTL
1099 extern int __init rxrpc_sysctl_init(void);
1100 extern void rxrpc_sysctl_exit(void);
1101 #else
rxrpc_sysctl_init(void)1102 static inline int __init rxrpc_sysctl_init(void) { return 0; }
rxrpc_sysctl_exit(void)1103 static inline void rxrpc_sysctl_exit(void) {}
1104 #endif
1105
1106 /*
1107 * utils.c
1108 */
1109 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1110
before(u32 seq1,u32 seq2)1111 static inline bool before(u32 seq1, u32 seq2)
1112 {
1113 return (s32)(seq1 - seq2) < 0;
1114 }
before_eq(u32 seq1,u32 seq2)1115 static inline bool before_eq(u32 seq1, u32 seq2)
1116 {
1117 return (s32)(seq1 - seq2) <= 0;
1118 }
after(u32 seq1,u32 seq2)1119 static inline bool after(u32 seq1, u32 seq2)
1120 {
1121 return (s32)(seq1 - seq2) > 0;
1122 }
after_eq(u32 seq1,u32 seq2)1123 static inline bool after_eq(u32 seq1, u32 seq2)
1124 {
1125 return (s32)(seq1 - seq2) >= 0;
1126 }
1127
1128 /*
1129 * debug tracing
1130 */
1131 extern unsigned int rxrpc_debug;
1132
1133 #define dbgprintk(FMT,...) \
1134 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1135
1136 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1137 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1138 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1139 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1140 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1141
1142
1143 #if defined(__KDEBUG)
1144 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1145 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1146 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1147 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1148 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1149
1150 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1151 #define RXRPC_DEBUG_KENTER 0x01
1152 #define RXRPC_DEBUG_KLEAVE 0x02
1153 #define RXRPC_DEBUG_KDEBUG 0x04
1154 #define RXRPC_DEBUG_KPROTO 0x08
1155 #define RXRPC_DEBUG_KNET 0x10
1156
1157 #define _enter(FMT,...) \
1158 do { \
1159 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1160 kenter(FMT,##__VA_ARGS__); \
1161 } while (0)
1162
1163 #define _leave(FMT,...) \
1164 do { \
1165 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1166 kleave(FMT,##__VA_ARGS__); \
1167 } while (0)
1168
1169 #define _debug(FMT,...) \
1170 do { \
1171 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1172 kdebug(FMT,##__VA_ARGS__); \
1173 } while (0)
1174
1175 #define _proto(FMT,...) \
1176 do { \
1177 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1178 kproto(FMT,##__VA_ARGS__); \
1179 } while (0)
1180
1181 #define _net(FMT,...) \
1182 do { \
1183 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1184 knet(FMT,##__VA_ARGS__); \
1185 } while (0)
1186
1187 #else
1188 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1189 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1190 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1191 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1192 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1193 #endif
1194
1195 /*
1196 * debug assertion checking
1197 */
1198 #if 1 // defined(__KDEBUGALL)
1199
1200 #define ASSERT(X) \
1201 do { \
1202 if (unlikely(!(X))) { \
1203 pr_err("Assertion failed\n"); \
1204 BUG(); \
1205 } \
1206 } while (0)
1207
1208 #define ASSERTCMP(X, OP, Y) \
1209 do { \
1210 __typeof__(X) _x = (X); \
1211 __typeof__(Y) _y = (__typeof__(X))(Y); \
1212 if (unlikely(!(_x OP _y))) { \
1213 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1214 (unsigned long)_x, (unsigned long)_x, #OP, \
1215 (unsigned long)_y, (unsigned long)_y); \
1216 BUG(); \
1217 } \
1218 } while (0)
1219
1220 #define ASSERTIF(C, X) \
1221 do { \
1222 if (unlikely((C) && !(X))) { \
1223 pr_err("Assertion failed\n"); \
1224 BUG(); \
1225 } \
1226 } while (0)
1227
1228 #define ASSERTIFCMP(C, X, OP, Y) \
1229 do { \
1230 __typeof__(X) _x = (X); \
1231 __typeof__(Y) _y = (__typeof__(X))(Y); \
1232 if (unlikely((C) && !(_x OP _y))) { \
1233 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1234 (unsigned long)_x, (unsigned long)_x, #OP, \
1235 (unsigned long)_y, (unsigned long)_y); \
1236 BUG(); \
1237 } \
1238 } while (0)
1239
1240 #else
1241
1242 #define ASSERT(X) \
1243 do { \
1244 } while (0)
1245
1246 #define ASSERTCMP(X, OP, Y) \
1247 do { \
1248 } while (0)
1249
1250 #define ASSERTIF(C, X) \
1251 do { \
1252 } while (0)
1253
1254 #define ASSERTIFCMP(C, X, OP, Y) \
1255 do { \
1256 } while (0)
1257
1258 #endif /* __KDEBUGALL */
1259