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btrfs: migrate the block group ref counting stuff
[linux/fpc-iii.git] / net / rxrpc / ar-internal.h
blob8051dfdcf26df1a506043ab887de93dd5c24aadc
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 <net/net_namespace.h>
11 #include <net/netns/generic.h>
12 #include <net/sock.h>
13 #include <net/af_rxrpc.h>
14 #include "protocol.h"
15
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
21 #define CHECK_SLAB_OKAY(X) do {} while (0)
22 #endif
23
24 #define FCRYPT_BSIZE 8
25 struct rxrpc_crypt {
26 union {
27 u8 x[FCRYPT_BSIZE];
28 __be32 n[2];
29 };
30 } __attribute__((aligned(8)));
31
32 #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
36 struct rxrpc_connection;
37
38 /*
39 * Mark applied to socket buffers in skb->mark. skb->priority is used
40 * to pass supplementary information.
41 */
42 enum rxrpc_skb_mark {
43 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
45 };
46
47 /*
48 * sk_state for RxRPC sockets
49 */
50 enum {
51 RXRPC_UNBOUND = 0,
52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
53 RXRPC_CLIENT_BOUND, /* client local address bound */
54 RXRPC_SERVER_BOUND, /* server local address bound */
55 RXRPC_SERVER_BOUND2, /* second server local address bound */
56 RXRPC_SERVER_LISTENING, /* server listening for connections */
57 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
58 RXRPC_CLOSE, /* socket is being closed */
59 };
60
61 /*
62 * Per-network namespace data.
63 */
64 struct 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 */
69 atomic_t nr_calls; /* Count of allocated calls */
70
71 atomic_t nr_conns;
72 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 */
75 struct work_struct service_conn_reaper;
76 struct timer_list service_conn_reap_timer;
77
78 unsigned int nr_client_conns;
79 unsigned int nr_active_client_conns;
80 bool kill_all_client_conns;
81 bool live;
82 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;
87 struct work_struct client_conn_reaper;
88 struct timer_list client_conn_reap_timer;
89
90 struct list_head local_endpoints;
91 struct mutex local_mutex; /* Lock for ->local_endpoints */
92
93 DECLARE_HASHTABLE (peer_hash, 10);
94 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;
98 time64_t peer_keepalive_base;
99 struct list_head peer_keepalive[32];
100 struct list_head peer_keepalive_new;
101 struct timer_list peer_keepalive_timer;
102 struct work_struct peer_keepalive_work;
103 };
104
105 /*
106 * 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 */
113 struct 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 /*
127 * RxRPC socket definition
128 */
129 struct rxrpc_sock {
130 /* WARNING: sk has to be the first member */
131 struct sock sk;
132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
134 struct rxrpc_local *local; /* local endpoint */
135 struct rxrpc_backlog *backlog; /* Preallocation for services */
136 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 */
141 struct key *key; /* security for this socket */
142 struct key *securities; /* list of server security descriptors */
143 struct rb_root calls; /* User ID -> call mapping */
144 unsigned long flags;
145 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
146 rwlock_t call_lock; /* lock for calls */
147 u32 min_sec_level; /* minimum security level */
148 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
149 bool exclusive; /* Exclusive connection for a client socket */
150 u16 second_service; /* Additional service bound to the endpoint */
151 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;
156 sa_family_t family; /* Protocol family created with */
157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
159 };
160
161 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
162
163 /*
164 * CPU-byteorder normalised Rx packet header.
165 */
166 struct 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 /*
184 * RxRPC socket buffer private variables
185 * - max 48 bytes (struct sk_buff::cb)
186 */
187 struct rxrpc_skb_priv {
188 atomic_t nr_ring_pins; /* Number of rxtx ring pins */
189 u8 nr_subpackets; /* Number of subpackets */
190 u8 rx_flags; /* Received packet flags */
191 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */
192 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */
193 union {
194 int remain; /* amount of space remaining for next write */
195
196 /* List of requested ACKs on subpackets */
197 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) /
198 BITS_PER_LONG];
199 };
200
201 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
202 };
203
204 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
205
206 /*
207 * RxRPC security module interface
208 */
209 struct rxrpc_security {
210 const char *name; /* name of this service */
211 u8 security_index; /* security type provided */
212
213 /* Initialise a security service */
214 int (*init)(void);
215
216 /* Clean up a security service */
217 void (*exit)(void);
218
219 /* initialise a connection's security */
220 int (*init_connection_security)(struct rxrpc_connection *);
221
222 /* prime a connection's packet security */
223 int (*prime_packet_security)(struct rxrpc_connection *);
224
225 /* impose security on a packet */
226 int (*secure_packet)(struct rxrpc_call *,
227 struct sk_buff *,
228 size_t,
229 void *);
230
231 /* verify the security on a received packet */
232 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
233 unsigned int, unsigned int, rxrpc_seq_t, u16);
234
235 /* Locate the data in a received packet that has been verified. */
236 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
237 unsigned int *, unsigned int *);
238
239 /* issue a challenge */
240 int (*issue_challenge)(struct rxrpc_connection *);
241
242 /* respond to a challenge */
243 int (*respond_to_challenge)(struct rxrpc_connection *,
244 struct sk_buff *,
245 u32 *);
246
247 /* verify a response */
248 int (*verify_response)(struct rxrpc_connection *,
249 struct sk_buff *,
250 u32 *);
251
252 /* clear connection security */
253 void (*clear)(struct rxrpc_connection *);
254 };
255
256 /*
257 * RxRPC local transport endpoint description
258 * - owned by a single AF_RXRPC socket
259 * - pointed to by transport socket struct sk_user_data
260 */
261 struct rxrpc_local {
262 struct rcu_head rcu;
263 atomic_t active_users; /* Number of users of the local endpoint */
264 atomic_t usage; /* Number of references to the structure */
265 struct rxrpc_net *rxnet; /* The network ns in which this resides */
266 struct list_head link;
267 struct socket *socket; /* my UDP socket */
268 struct work_struct processor;
269 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
270 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
271 struct sk_buff_head reject_queue; /* packets awaiting rejection */
272 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
273 struct rb_root client_conns; /* Client connections by socket params */
274 spinlock_t client_conns_lock; /* Lock for client_conns */
275 spinlock_t lock; /* access lock */
276 rwlock_t services_lock; /* lock for services list */
277 int debug_id; /* debug ID for printks */
278 bool dead;
279 bool service_closed; /* Service socket closed */
280 struct sockaddr_rxrpc srx; /* local address */
281 };
282
283 /*
284 * RxRPC remote transport endpoint definition
285 * - matched by local endpoint, remote port, address and protocol type
286 */
287 struct rxrpc_peer {
288 struct rcu_head rcu; /* This must be first */
289 atomic_t usage;
290 unsigned long hash_key;
291 struct hlist_node hash_link;
292 struct rxrpc_local *local;
293 struct hlist_head error_targets; /* targets for net error distribution */
294 struct rb_root service_conns; /* Service connections */
295 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
296 time64_t last_tx_at; /* Last time packet sent here */
297 seqlock_t service_conn_lock;
298 spinlock_t lock; /* access lock */
299 unsigned int if_mtu; /* interface MTU for this peer */
300 unsigned int mtu; /* network MTU for this peer */
301 unsigned int maxdata; /* data size (MTU - hdrsize) */
302 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
303 int debug_id; /* debug ID for printks */
304 struct sockaddr_rxrpc srx; /* remote address */
305
306 /* calculated RTT cache */
307 #define RXRPC_RTT_CACHE_SIZE 32
308 spinlock_t rtt_input_lock; /* RTT lock for input routine */
309 ktime_t rtt_last_req; /* Time of last RTT request */
310 u64 rtt; /* Current RTT estimate (in nS) */
311 u64 rtt_sum; /* Sum of cache contents */
312 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
313 u8 rtt_cursor; /* next entry at which to insert */
314 u8 rtt_usage; /* amount of cache actually used */
315
316 u8 cong_cwnd; /* Congestion window size */
317 };
318
319 /*
320 * Keys for matching a connection.
321 */
322 struct rxrpc_conn_proto {
323 union {
324 struct {
325 u32 epoch; /* epoch of this connection */
326 u32 cid; /* connection ID */
327 };
328 u64 index_key;
329 };
330 };
331
332 struct rxrpc_conn_parameters {
333 struct rxrpc_local *local; /* Representation of local endpoint */
334 struct rxrpc_peer *peer; /* Remote endpoint */
335 struct key *key; /* Security details */
336 bool exclusive; /* T if conn is exclusive */
337 bool upgrade; /* T if service ID can be upgraded */
338 u16 service_id; /* Service ID for this connection */
339 u32 security_level; /* Security level selected */
340 };
341
342 /*
343 * Bits in the connection flags.
344 */
345 enum rxrpc_conn_flag {
346 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
347 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
348 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
349 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
350 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
351 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
352 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
353 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
354 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
355 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
356 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
357 };
358
359 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
360 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
361 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
362 (1UL << RXRPC_CONN_FINAL_ACK_3))
363
364 /*
365 * Events that can be raised upon a connection.
366 */
367 enum rxrpc_conn_event {
368 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
369 };
370
371 /*
372 * The connection cache state.
373 */
374 enum rxrpc_conn_cache_state {
375 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
376 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
377 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
378 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */
379 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
380 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
381 RXRPC_CONN__NR_CACHE_STATES
382 };
383
384 /*
385 * The connection protocol state.
386 */
387 enum rxrpc_conn_proto_state {
388 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
389 RXRPC_CONN_CLIENT, /* Client connection */
390 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
391 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
392 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
393 RXRPC_CONN_SERVICE, /* Service secured connection */
394 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
395 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
396 RXRPC_CONN__NR_STATES
397 };
398
399 /*
400 * RxRPC connection definition
401 * - matched by { local, peer, epoch, conn_id, direction }
402 * - each connection can only handle four simultaneous calls
403 */
404 struct rxrpc_connection {
405 struct rxrpc_conn_proto proto;
406 struct rxrpc_conn_parameters params;
407
408 atomic_t usage;
409 struct rcu_head rcu;
410 struct list_head cache_link;
411
412 spinlock_t channel_lock;
413 unsigned char active_chans; /* Mask of active channels */
414 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
415 struct list_head waiting_calls; /* Calls waiting for channels */
416 struct rxrpc_channel {
417 unsigned long final_ack_at; /* Time at which to issue final ACK */
418 struct rxrpc_call __rcu *call; /* Active call */
419 unsigned int call_debug_id; /* call->debug_id */
420 u32 call_id; /* ID of current call */
421 u32 call_counter; /* Call ID counter */
422 u32 last_call; /* ID of last call */
423 u8 last_type; /* Type of last packet */
424 union {
425 u32 last_seq;
426 u32 last_abort;
427 };
428 } channels[RXRPC_MAXCALLS];
429
430 struct timer_list timer; /* Conn event timer */
431 struct work_struct processor; /* connection event processor */
432 union {
433 struct rb_node client_node; /* Node in local->client_conns */
434 struct rb_node service_node; /* Node in peer->service_conns */
435 };
436 struct list_head proc_link; /* link in procfs list */
437 struct list_head link; /* link in master connection list */
438 struct sk_buff_head rx_queue; /* received conn-level packets */
439 const struct rxrpc_security *security; /* applied security module */
440 struct key *server_key; /* security for this service */
441 struct crypto_sync_skcipher *cipher; /* encryption handle */
442 struct rxrpc_crypt csum_iv; /* packet checksum base */
443 unsigned long flags;
444 unsigned long events;
445 unsigned long idle_timestamp; /* Time at which last became idle */
446 spinlock_t state_lock; /* state-change lock */
447 enum rxrpc_conn_cache_state cache_state;
448 enum rxrpc_conn_proto_state state; /* current state of connection */
449 u32 abort_code; /* Abort code of connection abort */
450 int debug_id; /* debug ID for printks */
451 atomic_t serial; /* packet serial number counter */
452 unsigned int hi_serial; /* highest serial number received */
453 u32 security_nonce; /* response re-use preventer */
454 u32 service_id; /* Service ID, possibly upgraded */
455 u8 size_align; /* data size alignment (for security) */
456 u8 security_size; /* security header size */
457 u8 security_ix; /* security type */
458 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
459 short error; /* Local error code */
460 };
461
462 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
463 {
464 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
465 }
466
467 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
468 {
469 return !rxrpc_to_server(sp);
470 }
471
472 /*
473 * Flags in call->flags.
474 */
475 enum rxrpc_call_flag {
476 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
477 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
478 RXRPC_CALL_IS_SERVICE, /* Call is service call */
479 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
480 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
481 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
482 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
483 RXRPC_CALL_PINGING, /* Ping in process */
484 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
485 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
486 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
487 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
488 RXRPC_CALL_IS_INTR, /* The call is interruptible */
489 };
490
491 /*
492 * Events that can be raised on a call.
493 */
494 enum rxrpc_call_event {
495 RXRPC_CALL_EV_ACK, /* need to generate ACK */
496 RXRPC_CALL_EV_ABORT, /* need to generate abort */
497 RXRPC_CALL_EV_RESEND, /* Tx resend required */
498 RXRPC_CALL_EV_PING, /* Ping send required */
499 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
500 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
501 };
502
503 /*
504 * The states that a call can be in.
505 */
506 enum rxrpc_call_state {
507 RXRPC_CALL_UNINITIALISED,
508 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
509 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
510 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
511 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
512 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
513 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
514 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
515 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
516 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
517 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
518 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
519 RXRPC_CALL_COMPLETE, /* - call complete */
520 NR__RXRPC_CALL_STATES
521 };
522
523 /*
524 * Call completion condition (state == RXRPC_CALL_COMPLETE).
525 */
526 enum rxrpc_call_completion {
527 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
528 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
529 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
530 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
531 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
532 NR__RXRPC_CALL_COMPLETIONS
533 };
534
535 /*
536 * Call Tx congestion management modes.
537 */
538 enum rxrpc_congest_mode {
539 RXRPC_CALL_SLOW_START,
540 RXRPC_CALL_CONGEST_AVOIDANCE,
541 RXRPC_CALL_PACKET_LOSS,
542 RXRPC_CALL_FAST_RETRANSMIT,
543 NR__RXRPC_CONGEST_MODES
544 };
545
546 /*
547 * RxRPC call definition
548 * - matched by { connection, call_id }
549 */
550 struct rxrpc_call {
551 struct rcu_head rcu;
552 struct rxrpc_connection *conn; /* connection carrying call */
553 struct rxrpc_peer *peer; /* Peer record for remote address */
554 struct rxrpc_sock __rcu *socket; /* socket responsible */
555 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
556 struct mutex user_mutex; /* User access mutex */
557 unsigned long ack_at; /* When deferred ACK needs to happen */
558 unsigned long ack_lost_at; /* When ACK is figured as lost */
559 unsigned long resend_at; /* When next resend needs to happen */
560 unsigned long ping_at; /* When next to send a ping */
561 unsigned long keepalive_at; /* When next to send a keepalive ping */
562 unsigned long expect_rx_by; /* When we expect to get a packet by */
563 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
564 unsigned long expect_term_by; /* When we expect call termination by */
565 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
566 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
567 struct timer_list timer; /* Combined event timer */
568 struct work_struct processor; /* Event processor */
569 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
570 struct list_head link; /* link in master call list */
571 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
572 struct hlist_node error_link; /* link in error distribution list */
573 struct list_head accept_link; /* Link in rx->acceptq */
574 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
575 struct list_head sock_link; /* Link in rx->sock_calls */
576 struct rb_node sock_node; /* Node in rx->calls */
577 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
578 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
579 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
580 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
581 unsigned long user_call_ID; /* user-defined call ID */
582 unsigned long flags;
583 unsigned long events;
584 spinlock_t lock;
585 spinlock_t notify_lock; /* Kernel notification lock */
586 rwlock_t state_lock; /* lock for state transition */
587 u32 abort_code; /* Local/remote abort code */
588 int error; /* Local error incurred */
589 enum rxrpc_call_state state; /* current state of call */
590 enum rxrpc_call_completion completion; /* Call completion condition */
591 atomic_t usage;
592 u16 service_id; /* service ID */
593 u8 security_ix; /* Security type */
594 u32 call_id; /* call ID on connection */
595 u32 cid; /* connection ID plus channel index */
596 int debug_id; /* debug ID for printks */
597 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
598 unsigned short rx_pkt_len; /* Current recvmsg packet len */
599
600 /* Rx/Tx circular buffer, depending on phase.
601 *
602 * In the Rx phase, packets are annotated with 0 or the number of the
603 * segment of a jumbo packet each buffer refers to. There can be up to
604 * 47 segments in a maximum-size UDP packet.
605 *
606 * In the Tx phase, packets are annotated with which buffers have been
607 * acked.
608 */
609 #define RXRPC_RXTX_BUFF_SIZE 64
610 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
611 #define RXRPC_INIT_RX_WINDOW_SIZE 63
612 struct sk_buff **rxtx_buffer;
613 u8 *rxtx_annotations;
614 #define RXRPC_TX_ANNO_ACK 0
615 #define RXRPC_TX_ANNO_UNACK 1
616 #define RXRPC_TX_ANNO_NAK 2
617 #define RXRPC_TX_ANNO_RETRANS 3
618 #define RXRPC_TX_ANNO_MASK 0x03
619 #define RXRPC_TX_ANNO_LAST 0x04
620 #define RXRPC_TX_ANNO_RESENT 0x08
621
622 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */
623 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
624 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
625 * not hard-ACK'd packet follows this.
626 */
627 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
628 u16 tx_backoff; /* Delay to insert due to Tx failure */
629
630 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
631 * is fixed, we keep these numbers in terms of segments (ie. DATA
632 * packets) rather than bytes.
633 */
634 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
635 u8 cong_cwnd; /* Congestion window size */
636 u8 cong_extra; /* Extra to send for congestion management */
637 u8 cong_ssthresh; /* Slow-start threshold */
638 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
639 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
640 u8 cong_cumul_acks; /* Cumulative ACK count */
641 ktime_t cong_tstamp; /* Last time cwnd was changed */
642
643 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
644 * consumed packet follows this.
645 */
646 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
647 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
648 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
649 u8 rx_winsize; /* Size of Rx window */
650 u8 tx_winsize; /* Maximum size of Tx window */
651 bool tx_phase; /* T if transmission phase, F if receive phase */
652 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
653
654 spinlock_t input_lock; /* Lock for packet input to this call */
655
656 /* receive-phase ACK management */
657 u8 ackr_reason; /* reason to ACK */
658 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
659 rxrpc_serial_t ackr_first_seq; /* first sequence number received */
660 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
661 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
662 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
663
664 /* ping management */
665 rxrpc_serial_t ping_serial; /* Last ping sent */
666 ktime_t ping_time; /* Time last ping sent */
667
668 /* transmission-phase ACK management */
669 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
670 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
671 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
672 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
673 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
674 };
675
676 /*
677 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
678 */
679 struct rxrpc_ack_summary {
680 u8 ack_reason;
681 u8 nr_acks; /* Number of ACKs in packet */
682 u8 nr_nacks; /* Number of NACKs in packet */
683 u8 nr_new_acks; /* Number of new ACKs in packet */
684 u8 nr_new_nacks; /* Number of new NACKs in packet */
685 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
686 bool new_low_nack; /* T if new low NACK found */
687 bool retrans_timeo; /* T if reTx due to timeout happened */
688 u8 flight_size; /* Number of unreceived transmissions */
689 /* Place to stash values for tracing */
690 enum rxrpc_congest_mode mode:8;
691 u8 cwnd;
692 u8 ssthresh;
693 u8 dup_acks;
694 u8 cumulative_acks;
695 };
696
697 /*
698 * sendmsg() cmsg-specified parameters.
699 */
700 enum rxrpc_command {
701 RXRPC_CMD_SEND_DATA, /* send data message */
702 RXRPC_CMD_SEND_ABORT, /* request abort generation */
703 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
704 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
705 };
706
707 struct rxrpc_call_params {
708 s64 tx_total_len; /* Total Tx data length (if send data) */
709 unsigned long user_call_ID; /* User's call ID */
710 struct {
711 u32 hard; /* Maximum lifetime (sec) */
712 u32 idle; /* Max time since last data packet (msec) */
713 u32 normal; /* Max time since last call packet (msec) */
714 } timeouts;
715 u8 nr_timeouts; /* Number of timeouts specified */
716 bool intr; /* The call is interruptible */
717 };
718
719 struct rxrpc_send_params {
720 struct rxrpc_call_params call;
721 u32 abort_code; /* Abort code to Tx (if abort) */
722 enum rxrpc_command command : 8; /* The command to implement */
723 bool exclusive; /* Shared or exclusive call */
724 bool upgrade; /* If the connection is upgradeable */
725 };
726
727 #include <trace/events/rxrpc.h>
728
729 /*
730 * af_rxrpc.c
731 */
732 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
733 extern struct workqueue_struct *rxrpc_workqueue;
734
735 /*
736 * call_accept.c
737 */
738 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
739 void rxrpc_discard_prealloc(struct rxrpc_sock *);
740 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
741 struct rxrpc_sock *,
742 struct sk_buff *);
743 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
744 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
745 rxrpc_notify_rx_t);
746 int rxrpc_reject_call(struct rxrpc_sock *);
747
748 /*
749 * call_event.c
750 */
751 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool,
752 enum rxrpc_propose_ack_trace);
753 void rxrpc_process_call(struct work_struct *);
754
755 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
756 unsigned long expire_at,
757 unsigned long now,
758 enum rxrpc_timer_trace why)
759 {
760 trace_rxrpc_timer(call, why, now);
761 timer_reduce(&call->timer, expire_at);
762 }
763
764 /*
765 * call_object.c
766 */
767 extern const char *const rxrpc_call_states[];
768 extern const char *const rxrpc_call_completions[];
769 extern unsigned int rxrpc_max_call_lifetime;
770 extern struct kmem_cache *rxrpc_call_jar;
771
772 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
773 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
774 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
775 struct rxrpc_conn_parameters *,
776 struct sockaddr_rxrpc *,
777 struct rxrpc_call_params *, gfp_t,
778 unsigned int);
779 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
780 struct sk_buff *);
781 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
782 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
783 bool __rxrpc_queue_call(struct rxrpc_call *);
784 bool rxrpc_queue_call(struct rxrpc_call *);
785 void rxrpc_see_call(struct rxrpc_call *);
786 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
787 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
788 void rxrpc_cleanup_call(struct rxrpc_call *);
789 void rxrpc_destroy_all_calls(struct rxrpc_net *);
790
791 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
792 {
793 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
794 }
795
796 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
797 {
798 return !rxrpc_is_service_call(call);
799 }
800
801 /*
802 * Transition a call to the complete state.
803 */
804 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
805 enum rxrpc_call_completion compl,
806 u32 abort_code,
807 int error)
808 {
809 if (call->state < RXRPC_CALL_COMPLETE) {
810 call->abort_code = abort_code;
811 call->error = error;
812 call->completion = compl,
813 call->state = RXRPC_CALL_COMPLETE;
814 trace_rxrpc_call_complete(call);
815 wake_up(&call->waitq);
816 return true;
817 }
818 return false;
819 }
820
821 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
822 enum rxrpc_call_completion compl,
823 u32 abort_code,
824 int error)
825 {
826 bool ret;
827
828 write_lock_bh(&call->state_lock);
829 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
830 write_unlock_bh(&call->state_lock);
831 return ret;
832 }
833
834 /*
835 * Record that a call successfully completed.
836 */
837 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
838 {
839 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
840 }
841
842 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
843 {
844 bool ret;
845
846 write_lock_bh(&call->state_lock);
847 ret = __rxrpc_call_completed(call);
848 write_unlock_bh(&call->state_lock);
849 return ret;
850 }
851
852 /*
853 * Record that a call is locally aborted.
854 */
855 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
856 rxrpc_seq_t seq,
857 u32 abort_code, int error)
858 {
859 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
860 abort_code, error);
861 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
862 abort_code, error);
863 }
864
865 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
866 rxrpc_seq_t seq, u32 abort_code, int error)
867 {
868 bool ret;
869
870 write_lock_bh(&call->state_lock);
871 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
872 write_unlock_bh(&call->state_lock);
873 return ret;
874 }
875
876 /*
877 * Abort a call due to a protocol error.
878 */
879 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
880 struct sk_buff *skb,
881 const char *eproto_why,
882 const char *why,
883 u32 abort_code)
884 {
885 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
886
887 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
888 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
889 }
890
891 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
892 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
893 (abort_why), (abort_code))
894
895 /*
896 * conn_client.c
897 */
898 extern unsigned int rxrpc_max_client_connections;
899 extern unsigned int rxrpc_reap_client_connections;
900 extern unsigned long rxrpc_conn_idle_client_expiry;
901 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
902 extern struct idr rxrpc_client_conn_ids;
903
904 void rxrpc_destroy_client_conn_ids(void);
905 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
906 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
907 gfp_t);
908 void rxrpc_expose_client_call(struct rxrpc_call *);
909 void rxrpc_disconnect_client_call(struct rxrpc_call *);
910 void rxrpc_put_client_conn(struct rxrpc_connection *);
911 void rxrpc_discard_expired_client_conns(struct work_struct *);
912 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
913 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
914
915 /*
916 * conn_event.c
917 */
918 void rxrpc_process_connection(struct work_struct *);
919
920 /*
921 * conn_object.c
922 */
923 extern unsigned int rxrpc_connection_expiry;
924 extern unsigned int rxrpc_closed_conn_expiry;
925
926 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
927 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
928 struct sk_buff *,
929 struct rxrpc_peer **);
930 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
931 void rxrpc_disconnect_call(struct rxrpc_call *);
932 void rxrpc_kill_connection(struct rxrpc_connection *);
933 bool rxrpc_queue_conn(struct rxrpc_connection *);
934 void rxrpc_see_connection(struct rxrpc_connection *);
935 void rxrpc_get_connection(struct rxrpc_connection *);
936 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
937 void rxrpc_put_service_conn(struct rxrpc_connection *);
938 void rxrpc_service_connection_reaper(struct work_struct *);
939 void rxrpc_destroy_all_connections(struct rxrpc_net *);
940
941 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
942 {
943 return conn->out_clientflag;
944 }
945
946 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
947 {
948 return !rxrpc_conn_is_client(conn);
949 }
950
951 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
952 {
953 if (!conn)
954 return;
955
956 if (rxrpc_conn_is_client(conn))
957 rxrpc_put_client_conn(conn);
958 else
959 rxrpc_put_service_conn(conn);
960 }
961
962 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
963 unsigned long expire_at)
964 {
965 timer_reduce(&conn->timer, expire_at);
966 }
967
968 /*
969 * conn_service.c
970 */
971 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
972 struct sk_buff *);
973 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
974 void rxrpc_new_incoming_connection(struct rxrpc_sock *,
975 struct rxrpc_connection *, struct sk_buff *);
976 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
977
978 /*
979 * input.c
980 */
981 int rxrpc_input_packet(struct sock *, struct sk_buff *);
982
983 /*
984 * insecure.c
985 */
986 extern const struct rxrpc_security rxrpc_no_security;
987
988 /*
989 * key.c
990 */
991 extern struct key_type key_type_rxrpc;
992 extern struct key_type key_type_rxrpc_s;
993
994 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
995 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
996 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
997 u32);
998
999 /*
1000 * local_event.c
1001 */
1002 extern void rxrpc_process_local_events(struct rxrpc_local *);
1003
1004 /*
1005 * local_object.c
1006 */
1007 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1008 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
1009 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
1010 void rxrpc_put_local(struct rxrpc_local *);
1011 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
1012 void rxrpc_unuse_local(struct rxrpc_local *);
1013 void rxrpc_queue_local(struct rxrpc_local *);
1014 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1015
1016 /*
1017 * misc.c
1018 */
1019 extern unsigned int rxrpc_max_backlog __read_mostly;
1020 extern unsigned long rxrpc_requested_ack_delay;
1021 extern unsigned long rxrpc_soft_ack_delay;
1022 extern unsigned long rxrpc_idle_ack_delay;
1023 extern unsigned int rxrpc_rx_window_size;
1024 extern unsigned int rxrpc_rx_mtu;
1025 extern unsigned int rxrpc_rx_jumbo_max;
1026 extern unsigned long rxrpc_resend_timeout;
1027
1028 extern const s8 rxrpc_ack_priority[];
1029
1030 /*
1031 * net_ns.c
1032 */
1033 extern unsigned int rxrpc_net_id;
1034 extern struct pernet_operations rxrpc_net_ops;
1035
1036 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1037 {
1038 return net_generic(net, rxrpc_net_id);
1039 }
1040
1041 /*
1042 * output.c
1043 */
1044 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1045 int rxrpc_send_abort_packet(struct rxrpc_call *);
1046 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1047 void rxrpc_reject_packets(struct rxrpc_local *);
1048 void rxrpc_send_keepalive(struct rxrpc_peer *);
1049
1050 /*
1051 * peer_event.c
1052 */
1053 void rxrpc_error_report(struct sock *);
1054 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1055 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1056 void rxrpc_peer_keepalive_worker(struct work_struct *);
1057
1058 /*
1059 * peer_object.c
1060 */
1061 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1062 const struct sockaddr_rxrpc *);
1063 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1064 struct sockaddr_rxrpc *, gfp_t);
1065 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1066 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1067 struct rxrpc_peer *);
1068 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1069 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1070 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1071 void rxrpc_put_peer(struct rxrpc_peer *);
1072 void rxrpc_put_peer_locked(struct rxrpc_peer *);
1073
1074 /*
1075 * proc.c
1076 */
1077 extern const struct seq_operations rxrpc_call_seq_ops;
1078 extern const struct seq_operations rxrpc_connection_seq_ops;
1079 extern const struct seq_operations rxrpc_peer_seq_ops;
1080
1081 /*
1082 * recvmsg.c
1083 */
1084 void rxrpc_notify_socket(struct rxrpc_call *);
1085 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1086
1087 /*
1088 * rxkad.c
1089 */
1090 #ifdef CONFIG_RXKAD
1091 extern const struct rxrpc_security rxkad;
1092 #endif
1093
1094 /*
1095 * security.c
1096 */
1097 int __init rxrpc_init_security(void);
1098 void rxrpc_exit_security(void);
1099 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1100 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1101
1102 /*
1103 * sendmsg.c
1104 */
1105 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1106
1107 /*
1108 * skbuff.c
1109 */
1110 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1111 void rxrpc_packet_destructor(struct sk_buff *);
1112 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1113 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1114 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1115 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1116 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1117 void rxrpc_purge_queue(struct sk_buff_head *);
1118
1119 /*
1120 * sysctl.c
1121 */
1122 #ifdef CONFIG_SYSCTL
1123 extern int __init rxrpc_sysctl_init(void);
1124 extern void rxrpc_sysctl_exit(void);
1125 #else
1126 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1127 static inline void rxrpc_sysctl_exit(void) {}
1128 #endif
1129
1130 /*
1131 * utils.c
1132 */
1133 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1134
1135 static inline bool before(u32 seq1, u32 seq2)
1136 {
1137 return (s32)(seq1 - seq2) < 0;
1138 }
1139 static inline bool before_eq(u32 seq1, u32 seq2)
1140 {
1141 return (s32)(seq1 - seq2) <= 0;
1142 }
1143 static inline bool after(u32 seq1, u32 seq2)
1144 {
1145 return (s32)(seq1 - seq2) > 0;
1146 }
1147 static inline bool after_eq(u32 seq1, u32 seq2)
1148 {
1149 return (s32)(seq1 - seq2) >= 0;
1150 }
1151
1152 /*
1153 * debug tracing
1154 */
1155 extern unsigned int rxrpc_debug;
1156
1157 #define dbgprintk(FMT,...) \
1158 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1159
1160 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1161 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1162 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1163 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1164 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1165
1166
1167 #if defined(__KDEBUG)
1168 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1169 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1170 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1171 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1172 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1173
1174 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1175 #define RXRPC_DEBUG_KENTER 0x01
1176 #define RXRPC_DEBUG_KLEAVE 0x02
1177 #define RXRPC_DEBUG_KDEBUG 0x04
1178 #define RXRPC_DEBUG_KPROTO 0x08
1179 #define RXRPC_DEBUG_KNET 0x10
1180
1181 #define _enter(FMT,...) \
1182 do { \
1183 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1184 kenter(FMT,##__VA_ARGS__); \
1185 } while (0)
1186
1187 #define _leave(FMT,...) \
1188 do { \
1189 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1190 kleave(FMT,##__VA_ARGS__); \
1191 } while (0)
1192
1193 #define _debug(FMT,...) \
1194 do { \
1195 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1196 kdebug(FMT,##__VA_ARGS__); \
1197 } while (0)
1198
1199 #define _proto(FMT,...) \
1200 do { \
1201 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1202 kproto(FMT,##__VA_ARGS__); \
1203 } while (0)
1204
1205 #define _net(FMT,...) \
1206 do { \
1207 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1208 knet(FMT,##__VA_ARGS__); \
1209 } while (0)
1210
1211 #else
1212 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1213 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1214 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1215 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1216 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1217 #endif
1218
1219 /*
1220 * debug assertion checking
1221 */
1222 #if 1 // defined(__KDEBUGALL)
1223
1224 #define ASSERT(X) \
1225 do { \
1226 if (unlikely(!(X))) { \
1227 pr_err("Assertion failed\n"); \
1228 BUG(); \
1229 } \
1230 } while (0)
1231
1232 #define ASSERTCMP(X, OP, Y) \
1233 do { \
1234 __typeof__(X) _x = (X); \
1235 __typeof__(Y) _y = (__typeof__(X))(Y); \
1236 if (unlikely(!(_x OP _y))) { \
1237 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1238 (unsigned long)_x, (unsigned long)_x, #OP, \
1239 (unsigned long)_y, (unsigned long)_y); \
1240 BUG(); \
1241 } \
1242 } while (0)
1243
1244 #define ASSERTIF(C, X) \
1245 do { \
1246 if (unlikely((C) && !(X))) { \
1247 pr_err("Assertion failed\n"); \
1248 BUG(); \
1249 } \
1250 } while (0)
1251
1252 #define ASSERTIFCMP(C, X, OP, Y) \
1253 do { \
1254 __typeof__(X) _x = (X); \
1255 __typeof__(Y) _y = (__typeof__(X))(Y); \
1256 if (unlikely((C) && !(_x OP _y))) { \
1257 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1258 (unsigned long)_x, (unsigned long)_x, #OP, \
1259 (unsigned long)_y, (unsigned long)_y); \
1260 BUG(); \
1261 } \
1262 } while (0)
1263
1264 #else
1265
1266 #define ASSERT(X) \
1267 do { \
1268 } while (0)
1269
1270 #define ASSERTCMP(X, OP, Y) \
1271 do { \
1272 } while (0)
1273
1274 #define ASSERTIF(C, X) \
1275 do { \
1276 } while (0)
1277
1278 #define ASSERTIFCMP(C, X, OP, Y) \
1279 do { \
1280 } while (0)
1281
1282 #endif /* __KDEBUGALL */
Linux with added FPC-III support