1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* AF_RXRPC internal definitions
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
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>
14 #include <net/af_rxrpc.h>
15 #include <keys/rxrpc-type.h>
18 #define FCRYPT_BSIZE 8
24 } __attribute__((aligned(8)));
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))
30 struct key_preparsed_payload;
31 struct rxrpc_connection;
35 * Mark applied to socket buffers in skb->mark. skb->priority is used
36 * to pass supplementary information.
39 RXRPC_SKB_MARK_PACKET, /* Received packet */
40 RXRPC_SKB_MARK_ERROR, /* Error notification */
41 RXRPC_SKB_MARK_SERVICE_CONN_SECURED, /* Service connection response has been verified */
42 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
43 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
47 * sk_state for RxRPC sockets
51 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
52 RXRPC_CLIENT_BOUND, /* client local address bound */
53 RXRPC_SERVER_BOUND, /* server local address bound */
54 RXRPC_SERVER_BOUND2, /* second server local address bound */
55 RXRPC_SERVER_LISTENING, /* server listening for connections */
56 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
57 RXRPC_CLOSE, /* socket is being closed */
61 * Per-network namespace data.
64 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
65 u32 epoch; /* Local epoch for detecting local-end reset */
66 struct list_head calls; /* List of calls active in this namespace */
67 spinlock_t call_lock; /* Lock for ->calls */
68 atomic_t nr_calls; /* Count of allocated calls */
71 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
72 struct list_head service_conns; /* Service conns in this namespace */
73 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
74 struct work_struct service_conn_reaper;
75 struct timer_list service_conn_reap_timer;
79 bool kill_all_client_conns;
80 atomic_t nr_client_conns;
81 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
82 struct mutex client_conn_discard_lock; /* Prevent multiple discarders */
83 struct list_head idle_client_conns;
84 struct work_struct client_conn_reaper;
85 struct timer_list client_conn_reap_timer;
87 struct hlist_head local_endpoints;
88 struct mutex local_mutex; /* Lock for ->local_endpoints */
90 DECLARE_HASHTABLE (peer_hash, 10);
91 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
93 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
94 u8 peer_keepalive_cursor;
95 time64_t peer_keepalive_base;
96 struct list_head peer_keepalive[32];
97 struct list_head peer_keepalive_new;
98 struct timer_list peer_keepalive_timer;
99 struct work_struct peer_keepalive_work;
101 atomic_t stat_tx_data;
102 atomic_t stat_tx_data_retrans;
103 atomic_t stat_tx_data_send;
104 atomic_t stat_tx_data_send_frag;
105 atomic_t stat_tx_data_send_fail;
106 atomic_t stat_tx_data_underflow;
107 atomic_t stat_tx_data_cwnd_reset;
108 atomic_t stat_rx_data;
109 atomic_t stat_rx_data_reqack;
110 atomic_t stat_rx_data_jumbo;
112 atomic_t stat_tx_ack_fill;
113 atomic_t stat_tx_ack_send;
114 atomic_t stat_tx_ack_skip;
115 atomic_t stat_tx_acks[256];
116 atomic_t stat_rx_acks[256];
118 atomic_t stat_why_req_ack[8];
120 atomic_t stat_io_loop;
124 * Service backlog preallocation.
126 * This contains circular buffers of preallocated peers, connections and calls
127 * for incoming service calls and their head and tail pointers. This allows
128 * calls to be set up in the data_ready handler, thereby avoiding the need to
129 * shuffle packets around so much.
131 struct rxrpc_backlog {
132 unsigned short peer_backlog_head;
133 unsigned short peer_backlog_tail;
134 unsigned short conn_backlog_head;
135 unsigned short conn_backlog_tail;
136 unsigned short call_backlog_head;
137 unsigned short call_backlog_tail;
138 #define RXRPC_BACKLOG_MAX 32
139 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
140 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
141 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
145 * RxRPC socket definition
148 /* WARNING: sk has to be the first member */
150 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
151 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
152 struct rxrpc_local *local; /* local endpoint */
153 struct rxrpc_backlog *backlog; /* Preallocation for services */
154 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
155 struct list_head sock_calls; /* List of calls owned by this socket */
156 struct list_head to_be_accepted; /* calls awaiting acceptance */
157 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
158 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
159 struct key *key; /* security for this socket */
160 struct key *securities; /* list of server security descriptors */
161 struct rb_root calls; /* User ID -> call mapping */
163 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
164 rwlock_t call_lock; /* lock for calls */
165 u32 min_sec_level; /* minimum security level */
166 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
167 bool exclusive; /* Exclusive connection for a client socket */
168 u16 second_service; /* Additional service bound to the endpoint */
170 /* Service upgrade information */
171 u16 from; /* Service ID to upgrade (if not 0) */
172 u16 to; /* service ID to upgrade to */
174 sa_family_t family; /* Protocol family created with */
175 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
176 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
179 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
182 * CPU-byteorder normalised Rx packet header.
184 struct rxrpc_host_header {
185 u32 epoch; /* client boot timestamp */
186 u32 cid; /* connection and channel ID */
187 u32 callNumber; /* call ID (0 for connection-level packets) */
188 u32 seq; /* sequence number of pkt in call stream */
189 u32 serial; /* serial number of pkt sent to network */
190 u8 type; /* packet type */
191 u8 flags; /* packet flags */
192 u8 userStatus; /* app-layer defined status */
193 u8 securityIndex; /* security protocol ID */
195 u16 _rsvd; /* reserved */
196 u16 cksum; /* kerberos security checksum */
198 u16 serviceId; /* service ID */
202 * RxRPC socket buffer private variables
203 * - max 48 bytes (struct sk_buff::cb)
205 struct rxrpc_skb_priv {
206 struct rxrpc_connection *conn; /* Connection referred to (poke packet) */
207 u16 offset; /* Offset of data */
208 u16 len; /* Length of data */
210 #define RXRPC_RX_VERIFIED 0x01
212 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
215 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
218 * RxRPC security module interface
220 struct rxrpc_security {
221 const char *name; /* name of this service */
222 u8 security_index; /* security type provided */
223 u32 no_key_abort; /* Abort code indicating no key */
225 /* Initialise a security service */
228 /* Clean up a security service */
231 /* Parse the information from a server key */
232 int (*preparse_server_key)(struct key_preparsed_payload *);
234 /* Clean up the preparse buffer after parsing a server key */
235 void (*free_preparse_server_key)(struct key_preparsed_payload *);
237 /* Destroy the payload of a server key */
238 void (*destroy_server_key)(struct key *);
240 /* Describe a server key */
241 void (*describe_server_key)(const struct key *, struct seq_file *);
243 /* initialise a connection's security */
244 int (*init_connection_security)(struct rxrpc_connection *,
245 struct rxrpc_key_token *);
247 /* Work out how much data we can store in a packet, given an estimate
248 * of the amount of data remaining.
250 int (*how_much_data)(struct rxrpc_call *, size_t,
251 size_t *, size_t *, size_t *);
253 /* impose security on a packet */
254 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
256 /* verify the security on a received packet */
257 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
259 /* Free crypto request on a call */
260 void (*free_call_crypto)(struct rxrpc_call *);
262 /* issue a challenge */
263 int (*issue_challenge)(struct rxrpc_connection *);
265 /* respond to a challenge */
266 int (*respond_to_challenge)(struct rxrpc_connection *,
269 /* verify a response */
270 int (*verify_response)(struct rxrpc_connection *,
273 /* clear connection security */
274 void (*clear)(struct rxrpc_connection *);
278 * RxRPC local transport endpoint description
279 * - owned by a single AF_RXRPC socket
280 * - pointed to by transport socket struct sk_user_data
284 atomic_t active_users; /* Number of users of the local endpoint */
285 refcount_t ref; /* Number of references to the structure */
286 struct net *net; /* The network namespace */
287 struct rxrpc_net *rxnet; /* Our bits in the network namespace */
288 struct hlist_node link;
289 struct socket *socket; /* my UDP socket */
290 struct task_struct *io_thread;
291 struct completion io_thread_ready; /* Indication that the I/O thread started */
292 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
293 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
294 struct sk_buff_head rx_queue; /* Received packets */
295 struct list_head conn_attend_q; /* Conns requiring immediate attention */
296 struct list_head call_attend_q; /* Calls requiring immediate attention */
297 struct rb_root client_bundles; /* Client connection bundles by socket params */
298 spinlock_t client_bundles_lock; /* Lock for client_bundles */
299 spinlock_t lock; /* access lock */
300 rwlock_t services_lock; /* lock for services list */
301 int debug_id; /* debug ID for printks */
303 bool service_closed; /* Service socket closed */
304 struct idr conn_ids; /* List of connection IDs */
305 spinlock_t conn_lock; /* Lock for client connection pool */
306 struct sockaddr_rxrpc srx; /* local address */
310 * RxRPC remote transport endpoint definition
311 * - matched by local endpoint, remote port, address and protocol type
314 struct rcu_head rcu; /* This must be first */
316 unsigned long hash_key;
317 struct hlist_node hash_link;
318 struct rxrpc_local *local;
319 struct hlist_head error_targets; /* targets for net error distribution */
320 struct rb_root service_conns; /* Service connections */
321 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
322 time64_t last_tx_at; /* Last time packet sent here */
323 seqlock_t service_conn_lock;
324 spinlock_t lock; /* access lock */
325 unsigned int if_mtu; /* interface MTU for this peer */
326 unsigned int mtu; /* network MTU for this peer */
327 unsigned int maxdata; /* data size (MTU - hdrsize) */
328 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
329 int debug_id; /* debug ID for printks */
330 struct sockaddr_rxrpc srx; /* remote address */
332 /* calculated RTT cache */
333 #define RXRPC_RTT_CACHE_SIZE 32
334 spinlock_t rtt_input_lock; /* RTT lock for input routine */
335 ktime_t rtt_last_req; /* Time of last RTT request */
336 unsigned int rtt_count; /* Number of samples we've got */
338 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
339 u32 mdev_us; /* medium deviation */
340 u32 mdev_max_us; /* maximal mdev for the last rtt period */
341 u32 rttvar_us; /* smoothed mdev_max */
342 u32 rto_j; /* Retransmission timeout in jiffies */
343 u8 backoff; /* Backoff timeout */
345 u8 cong_ssthresh; /* Congestion slow-start threshold */
349 * Keys for matching a connection.
351 struct rxrpc_conn_proto {
354 u32 epoch; /* epoch of this connection */
355 u32 cid; /* connection ID */
361 struct rxrpc_conn_parameters {
362 struct rxrpc_local *local; /* Representation of local endpoint */
363 struct key *key; /* Security details */
364 bool exclusive; /* T if conn is exclusive */
365 bool upgrade; /* T if service ID can be upgraded */
366 u16 service_id; /* Service ID for this connection */
367 u32 security_level; /* Security level selected */
371 * Call completion condition (state == RXRPC_CALL_COMPLETE).
373 enum rxrpc_call_completion {
374 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
375 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
376 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
377 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
378 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
379 NR__RXRPC_CALL_COMPLETIONS
383 * Bits in the connection flags.
385 enum rxrpc_conn_flag {
386 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
387 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
388 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
389 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
390 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
391 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
392 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
393 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
396 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
397 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
398 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
399 (1UL << RXRPC_CONN_FINAL_ACK_3))
402 * Events that can be raised upon a connection.
404 enum rxrpc_conn_event {
405 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
406 RXRPC_CONN_EV_ABORT_CALLS, /* Abort attached calls */
410 * The connection protocol state.
412 enum rxrpc_conn_proto_state {
413 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
414 RXRPC_CONN_CLIENT, /* Client connection */
415 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
416 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
417 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
418 RXRPC_CONN_SERVICE, /* Service secured connection */
419 RXRPC_CONN_ABORTED, /* Conn aborted */
420 RXRPC_CONN__NR_STATES
424 * RxRPC client connection bundle.
426 struct rxrpc_bundle {
427 struct rxrpc_local *local; /* Representation of local endpoint */
428 struct rxrpc_peer *peer; /* Remote endpoint */
429 struct key *key; /* Security details */
430 const struct rxrpc_security *security; /* applied security module */
432 atomic_t active; /* Number of active users */
433 unsigned int debug_id;
434 u32 security_level; /* Security level selected */
435 u16 service_id; /* Service ID for this connection */
436 bool try_upgrade; /* True if the bundle is attempting upgrade */
437 bool alloc_conn; /* True if someone's getting a conn */
438 bool exclusive; /* T if conn is exclusive */
439 bool upgrade; /* T if service ID can be upgraded */
440 short alloc_error; /* Error from last conn allocation */
441 spinlock_t channel_lock;
442 struct rb_node local_node; /* Node in local->client_conns */
443 struct list_head waiting_calls; /* Calls waiting for channels */
444 unsigned long avail_chans; /* Mask of available channels */
445 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
449 * RxRPC connection definition
450 * - matched by { local, peer, epoch, conn_id, direction }
451 * - each connection can only handle four simultaneous calls
453 struct rxrpc_connection {
454 struct rxrpc_conn_proto proto;
455 struct rxrpc_local *local; /* Representation of local endpoint */
456 struct rxrpc_peer *peer; /* Remote endpoint */
457 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
458 struct key *key; /* Security details */
459 struct list_head attend_link; /* Link in local->conn_attend_q */
462 atomic_t active; /* Active count for service conns */
464 struct list_head cache_link;
466 unsigned char act_chans; /* Mask of active channels */
467 struct rxrpc_channel {
468 unsigned long final_ack_at; /* Time at which to issue final ACK */
469 struct rxrpc_call __rcu *call; /* Active call */
470 unsigned int call_debug_id; /* call->debug_id */
471 u32 call_id; /* ID of current call */
472 u32 call_counter; /* Call ID counter */
473 u32 last_call; /* ID of last call */
474 u8 last_type; /* Type of last packet */
479 } channels[RXRPC_MAXCALLS];
481 struct timer_list timer; /* Conn event timer */
482 struct work_struct processor; /* connection event processor */
483 struct work_struct destructor; /* In-process-context destroyer */
484 struct rxrpc_bundle *bundle; /* Client connection bundle */
485 struct rb_node service_node; /* Node in peer->service_conns */
486 struct list_head proc_link; /* link in procfs list */
487 struct list_head link; /* link in master connection list */
488 struct sk_buff_head rx_queue; /* received conn-level packets */
490 const struct rxrpc_security *security; /* applied security module */
493 struct crypto_sync_skcipher *cipher; /* encryption handle */
494 struct rxrpc_crypt csum_iv; /* packet checksum base */
495 u32 nonce; /* response re-use preventer */
499 unsigned long events;
500 unsigned long idle_timestamp; /* Time at which last became idle */
501 spinlock_t state_lock; /* state-change lock */
502 enum rxrpc_conn_proto_state state; /* current state of connection */
503 enum rxrpc_call_completion completion; /* Completion condition */
504 s32 abort_code; /* Abort code of connection abort */
505 int debug_id; /* debug ID for printks */
506 atomic_t serial; /* packet serial number counter */
507 unsigned int hi_serial; /* highest serial number received */
508 u32 service_id; /* Service ID, possibly upgraded */
509 u32 security_level; /* Security level selected */
510 u8 security_ix; /* security type */
511 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
512 u8 bundle_shift; /* Index into bundle->avail_chans */
513 bool exclusive; /* T if conn is exclusive */
514 bool upgrade; /* T if service ID can be upgraded */
515 u16 orig_service_id; /* Originally requested service ID */
516 short error; /* Local error code */
519 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
521 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
524 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
526 return !rxrpc_to_server(sp);
530 * Flags in call->flags.
532 enum rxrpc_call_flag {
533 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
534 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
535 RXRPC_CALL_IS_SERVICE, /* Call is service call */
536 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
537 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
538 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
539 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
540 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
541 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
542 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
543 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
544 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
545 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
546 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
547 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */
548 RXRPC_CALL_RX_IS_IDLE, /* recvmsg() is idle - send an ACK */
549 RXRPC_CALL_RECVMSG_READ_ALL, /* recvmsg() read all of the received data */
553 * Events that can be raised on a call.
555 enum rxrpc_call_event {
556 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
557 RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */
561 * The states that a call can be in.
563 enum rxrpc_call_state {
564 RXRPC_CALL_UNINITIALISED,
565 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
566 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
567 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
568 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
569 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
570 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
571 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
572 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
573 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
574 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
575 RXRPC_CALL_COMPLETE, /* - call complete */
576 NR__RXRPC_CALL_STATES
580 * Call Tx congestion management modes.
582 enum rxrpc_congest_mode {
583 RXRPC_CALL_SLOW_START,
584 RXRPC_CALL_CONGEST_AVOIDANCE,
585 RXRPC_CALL_PACKET_LOSS,
586 RXRPC_CALL_FAST_RETRANSMIT,
587 NR__RXRPC_CONGEST_MODES
591 * RxRPC call definition
592 * - matched by { connection, call_id }
596 struct rxrpc_connection *conn; /* connection carrying call */
597 struct rxrpc_bundle *bundle; /* Connection bundle to use */
598 struct rxrpc_peer *peer; /* Peer record for remote address */
599 struct rxrpc_local *local; /* Representation of local endpoint */
600 struct rxrpc_sock __rcu *socket; /* socket responsible */
601 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
602 struct key *key; /* Security details */
603 const struct rxrpc_security *security; /* applied security module */
604 struct mutex user_mutex; /* User access mutex */
605 struct sockaddr_rxrpc dest_srx; /* Destination address */
606 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
607 unsigned long ack_lost_at; /* When ACK is figured as lost */
608 unsigned long resend_at; /* When next resend needs to happen */
609 unsigned long ping_at; /* When next to send a ping */
610 unsigned long keepalive_at; /* When next to send a keepalive ping */
611 unsigned long expect_rx_by; /* When we expect to get a packet by */
612 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
613 unsigned long expect_term_by; /* When we expect call termination by */
614 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
615 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
616 struct timer_list timer; /* Combined event timer */
617 struct work_struct destroyer; /* In-process-context destroyer */
618 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
619 struct list_head link; /* link in master call list */
620 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
621 struct hlist_node error_link; /* link in error distribution list */
622 struct list_head accept_link; /* Link in rx->acceptq */
623 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
624 struct list_head sock_link; /* Link in rx->sock_calls */
625 struct rb_node sock_node; /* Node in rx->calls */
626 struct list_head attend_link; /* Link in local->call_attend_q */
627 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
628 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
629 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
630 unsigned long user_call_ID; /* user-defined call ID */
632 unsigned long events;
633 spinlock_t notify_lock; /* Kernel notification lock */
634 rwlock_t state_lock; /* lock for state transition */
635 unsigned int send_abort_why; /* Why the abort [enum rxrpc_abort_reason] */
636 s32 send_abort; /* Abort code to be sent */
637 short send_abort_err; /* Error to be associated with the abort */
638 rxrpc_seq_t send_abort_seq; /* DATA packet that incurred the abort (or 0) */
639 s32 abort_code; /* Local/remote abort code */
640 int error; /* Local error incurred */
641 enum rxrpc_call_state state; /* current state of call */
642 enum rxrpc_call_completion completion; /* Call completion condition */
644 u8 security_ix; /* Security type */
645 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
646 u32 call_id; /* call ID on connection */
647 u32 cid; /* connection ID plus channel index */
648 u32 security_level; /* Security level selected */
649 int debug_id; /* debug ID for printks */
650 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
651 unsigned short rx_pkt_len; /* Current recvmsg packet len */
653 /* Transmitted data tracking. */
654 spinlock_t tx_lock; /* Transmit queue lock */
655 struct list_head tx_sendmsg; /* Sendmsg prepared packets */
656 struct list_head tx_buffer; /* Buffer of transmissible packets */
657 rxrpc_seq_t tx_bottom; /* First packet in buffer */
658 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
659 rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */
660 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
661 u16 tx_backoff; /* Delay to insert due to Tx failure */
662 u8 tx_winsize; /* Maximum size of Tx window */
663 #define RXRPC_TX_MAX_WINDOW 128
664 ktime_t tx_last_sent; /* Last time a transmission occurred */
666 /* Received data tracking */
667 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
668 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */
670 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */
671 rxrpc_seq_t rx_consumed; /* Highest packet consumed */
672 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
673 u8 rx_winsize; /* Size of Rx window */
675 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
676 * is fixed, we keep these numbers in terms of segments (ie. DATA
677 * packets) rather than bytes.
679 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
680 #define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4)
681 u8 cong_cwnd; /* Congestion window size */
682 u8 cong_extra; /* Extra to send for congestion management */
683 u8 cong_ssthresh; /* Slow-start threshold */
684 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
685 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
686 u8 cong_cumul_acks; /* Cumulative ACK count */
687 ktime_t cong_tstamp; /* Last time cwnd was changed */
689 /* Receive-phase ACK management (ACKs we send). */
690 u8 ackr_reason; /* reason to ACK */
691 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
692 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */
693 atomic_t ackr_nr_unacked; /* Number of unacked packets */
694 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
696 #define RXRPC_SACK_SIZE 256
697 /* SACK table for soft-acked packets */
698 u8 ackr_sack_table[RXRPC_SACK_SIZE];
702 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
703 ktime_t rtt_sent_at[4]; /* Time packet sent */
704 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
705 * Mask of pending samples in 8-11 */
706 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
707 #define RXRPC_CALL_RTT_PEND_SHIFT 8
709 /* Transmission-phase ACK management (ACKs we've received). */
710 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
711 rxrpc_seq_t acks_first_seq; /* first sequence number received */
712 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
713 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
714 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
715 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
719 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
721 struct rxrpc_ack_summary {
722 u16 nr_acks; /* Number of ACKs in packet */
723 u16 nr_new_acks; /* Number of new ACKs in packet */
724 u16 nr_rot_new_acks; /* Number of rotated new ACKs */
726 bool saw_nacks; /* Saw NACKs in packet */
727 bool new_low_nack; /* T if new low NACK found */
728 bool retrans_timeo; /* T if reTx due to timeout happened */
729 u8 flight_size; /* Number of unreceived transmissions */
730 /* Place to stash values for tracing */
731 enum rxrpc_congest_mode mode:8;
739 * sendmsg() cmsg-specified parameters.
742 RXRPC_CMD_SEND_DATA, /* send data message */
743 RXRPC_CMD_SEND_ABORT, /* request abort generation */
744 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
745 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
748 struct rxrpc_call_params {
749 s64 tx_total_len; /* Total Tx data length (if send data) */
750 unsigned long user_call_ID; /* User's call ID */
752 u32 hard; /* Maximum lifetime (sec) */
753 u32 idle; /* Max time since last data packet (msec) */
754 u32 normal; /* Max time since last call packet (msec) */
756 u8 nr_timeouts; /* Number of timeouts specified */
757 bool kernel; /* T if kernel is making the call */
758 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
761 struct rxrpc_send_params {
762 struct rxrpc_call_params call;
763 u32 abort_code; /* Abort code to Tx (if abort) */
764 enum rxrpc_command command : 8; /* The command to implement */
765 bool exclusive; /* Shared or exclusive call */
766 bool upgrade; /* If the connection is upgradeable */
770 * Buffer of data to be output as a packet.
774 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
775 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
776 ktime_t last_sent; /* Time at which last transmitted */
778 rxrpc_seq_t seq; /* Sequence number of this packet */
779 unsigned int call_debug_id;
780 unsigned int debug_id;
781 unsigned int len; /* Amount of data in buffer */
782 unsigned int space; /* Remaining data space */
783 unsigned int offset; /* Offset of fill point */
785 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
786 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
787 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
789 /* The packet for encrypting and DMA'ing. We align it such
790 * that data[] aligns correctly for any crypto blocksize.
792 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
793 struct rxrpc_wire_header wire; /* Network-ready header */
795 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
797 struct rxrpc_ackpacket ack;
804 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
806 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
809 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
811 return !rxrpc_sending_to_server(txb);
814 #include <trace/events/rxrpc.h>
819 extern atomic_t rxrpc_n_rx_skbs;
820 extern struct workqueue_struct *rxrpc_workqueue;
825 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
826 void rxrpc_discard_prealloc(struct rxrpc_sock *);
827 bool rxrpc_new_incoming_call(struct rxrpc_local *local,
828 struct rxrpc_peer *peer,
829 struct rxrpc_connection *conn,
830 struct sockaddr_rxrpc *peer_srx,
831 struct sk_buff *skb);
832 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
833 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
838 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
839 enum rxrpc_propose_ack_trace why);
840 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
841 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
842 enum rxrpc_propose_ack_trace);
843 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
844 void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb);
846 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
847 unsigned long expire_at,
849 enum rxrpc_timer_trace why);
851 bool rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb);
856 extern const char *const rxrpc_call_states[];
857 extern const char *const rxrpc_call_completions[];
858 extern struct kmem_cache *rxrpc_call_jar;
860 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what);
861 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
862 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
863 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
864 struct rxrpc_conn_parameters *,
865 struct sockaddr_rxrpc *,
866 struct rxrpc_call_params *, gfp_t,
868 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
870 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
871 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
872 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
873 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
874 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
875 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
876 void rxrpc_cleanup_call(struct rxrpc_call *);
877 void rxrpc_destroy_all_calls(struct rxrpc_net *);
879 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
881 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
884 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
886 return !rxrpc_is_service_call(call);
892 bool __rxrpc_set_call_completion(struct rxrpc_call *call,
893 enum rxrpc_call_completion compl,
896 bool rxrpc_set_call_completion(struct rxrpc_call *call,
897 enum rxrpc_call_completion compl,
900 bool __rxrpc_call_completed(struct rxrpc_call *call);
901 bool rxrpc_call_completed(struct rxrpc_call *call);
902 bool __rxrpc_abort_call(struct rxrpc_call *call, rxrpc_seq_t seq,
903 u32 abort_code, int error, enum rxrpc_abort_reason why);
904 bool rxrpc_abort_call(struct rxrpc_call *call, rxrpc_seq_t seq,
905 u32 abort_code, int error, enum rxrpc_abort_reason why);
907 static inline enum rxrpc_call_state rxrpc_call_state(const struct rxrpc_call *call)
909 /* Order read ->state before read ->error. */
910 return smp_load_acquire(&call->state);
913 static inline bool rxrpc_call_is_complete(const struct rxrpc_call *call)
915 return rxrpc_call_state(call) == RXRPC_CALL_COMPLETE;
918 static inline bool rxrpc_call_has_failed(const struct rxrpc_call *call)
920 return rxrpc_call_is_complete(call) && call->completion != RXRPC_CALL_SUCCEEDED;
926 extern unsigned int rxrpc_reap_client_connections;
927 extern unsigned long rxrpc_conn_idle_client_expiry;
928 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
930 void rxrpc_destroy_client_conn_ids(struct rxrpc_local *local);
931 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
932 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
933 int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp);
934 void rxrpc_expose_client_call(struct rxrpc_call *);
935 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
936 void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle);
937 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
938 void rxrpc_discard_expired_client_conns(struct work_struct *);
939 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
940 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
945 void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, struct sk_buff *skb,
946 unsigned int channel);
947 int rxrpc_abort_conn(struct rxrpc_connection *conn, struct sk_buff *skb,
948 s32 abort_code, int err, enum rxrpc_abort_reason why);
949 void rxrpc_process_connection(struct work_struct *);
950 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
951 bool rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb);
952 void rxrpc_input_conn_event(struct rxrpc_connection *conn, struct sk_buff *skb);
954 static inline bool rxrpc_is_conn_aborted(const struct rxrpc_connection *conn)
956 /* Order reading the abort info after the state check. */
957 return smp_load_acquire(&conn->state) == RXRPC_CONN_ABORTED;
963 extern unsigned int rxrpc_connection_expiry;
964 extern unsigned int rxrpc_closed_conn_expiry;
966 void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why);
967 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
968 struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *,
969 struct sockaddr_rxrpc *,
971 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
972 void rxrpc_disconnect_call(struct rxrpc_call *);
973 void rxrpc_kill_client_conn(struct rxrpc_connection *);
974 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
975 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
976 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
977 enum rxrpc_conn_trace);
978 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
979 enum rxrpc_conn_trace);
980 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
981 void rxrpc_service_connection_reaper(struct work_struct *);
982 void rxrpc_destroy_all_connections(struct rxrpc_net *);
984 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
986 return conn->out_clientflag;
989 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
991 return !rxrpc_conn_is_client(conn);
994 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
995 unsigned long expire_at)
997 timer_reduce(&conn->timer, expire_at);
1003 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
1005 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
1006 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
1007 const struct rxrpc_security *, struct sk_buff *);
1008 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
1013 void rxrpc_congestion_degrade(struct rxrpc_call *);
1014 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
1015 void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *);
1020 int rxrpc_encap_rcv(struct sock *, struct sk_buff *);
1021 void rxrpc_error_report(struct sock *);
1022 bool rxrpc_direct_abort(struct sk_buff *skb, enum rxrpc_abort_reason why,
1023 s32 abort_code, int err);
1024 int rxrpc_io_thread(void *data);
1025 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local)
1027 wake_up_process(local->io_thread);
1030 static inline bool rxrpc_protocol_error(struct sk_buff *skb, enum rxrpc_abort_reason why)
1032 return rxrpc_direct_abort(skb, why, RX_PROTOCOL_ERROR, -EPROTO);
1038 extern const struct rxrpc_security rxrpc_no_security;
1043 extern struct key_type key_type_rxrpc;
1045 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
1046 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
1052 void rxrpc_send_version_request(struct rxrpc_local *local,
1053 struct rxrpc_host_header *hdr,
1054 struct sk_buff *skb);
1059 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1060 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
1061 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
1062 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
1063 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
1064 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
1065 void rxrpc_destroy_local(struct rxrpc_local *local);
1066 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1068 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1069 enum rxrpc_local_trace why)
1073 r = refcount_read(&local->ref);
1074 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1075 trace_rxrpc_local(local->debug_id, why, r, u);
1079 static inline void rxrpc_see_local(struct rxrpc_local *local,
1080 enum rxrpc_local_trace why)
1084 r = refcount_read(&local->ref);
1085 u = atomic_read(&local->active_users);
1086 trace_rxrpc_local(local->debug_id, why, r, u);
1092 extern unsigned int rxrpc_max_backlog __read_mostly;
1093 extern unsigned long rxrpc_soft_ack_delay;
1094 extern unsigned long rxrpc_idle_ack_delay;
1095 extern unsigned int rxrpc_rx_window_size;
1096 extern unsigned int rxrpc_rx_mtu;
1097 extern unsigned int rxrpc_rx_jumbo_max;
1102 extern unsigned int rxrpc_net_id;
1103 extern struct pernet_operations rxrpc_net_ops;
1105 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1107 return net_generic(net, rxrpc_net_id);
1113 int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1114 int rxrpc_send_abort_packet(struct rxrpc_call *);
1115 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1116 void rxrpc_send_conn_abort(struct rxrpc_connection *conn);
1117 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb);
1118 void rxrpc_send_keepalive(struct rxrpc_peer *);
1119 void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1124 void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *);
1125 void rxrpc_peer_keepalive_worker(struct work_struct *);
1130 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1131 const struct sockaddr_rxrpc *);
1132 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
1133 struct sockaddr_rxrpc *srx, gfp_t gfp);
1134 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
1135 enum rxrpc_peer_trace);
1136 void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer);
1137 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1138 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1139 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1140 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1145 extern const struct seq_operations rxrpc_call_seq_ops;
1146 extern const struct seq_operations rxrpc_connection_seq_ops;
1147 extern const struct seq_operations rxrpc_peer_seq_ops;
1148 extern const struct seq_operations rxrpc_local_seq_ops;
1153 void rxrpc_notify_socket(struct rxrpc_call *);
1154 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1157 * Abort a call due to a protocol error.
1159 static inline int rxrpc_abort_eproto(struct rxrpc_call *call,
1160 struct sk_buff *skb,
1162 enum rxrpc_abort_reason why)
1164 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1166 rxrpc_abort_call(call, sp->hdr.seq, abort_code, -EPROTO, why);
1173 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1174 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1175 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1176 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1182 extern const struct rxrpc_security rxkad;
1188 int __init rxrpc_init_security(void);
1189 const struct rxrpc_security *rxrpc_security_lookup(u8);
1190 void rxrpc_exit_security(void);
1191 int rxrpc_init_client_call_security(struct rxrpc_call *);
1192 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1193 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1195 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1196 struct sk_buff *, u32, u32);
1201 bool rxrpc_propose_abort(struct rxrpc_call *call, s32 abort_code, int error,
1202 enum rxrpc_abort_reason why);
1203 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1208 extern struct key_type key_type_rxrpc_s;
1210 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1215 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1216 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1217 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1218 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1219 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1220 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1221 void rxrpc_purge_queue(struct sk_buff_head *);
1226 int rxrpc_stats_show(struct seq_file *seq, void *v);
1227 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1229 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1230 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1235 #ifdef CONFIG_SYSCTL
1236 extern int __init rxrpc_sysctl_init(void);
1237 extern void rxrpc_sysctl_exit(void);
1239 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1240 static inline void rxrpc_sysctl_exit(void) {}
1246 extern atomic_t rxrpc_nr_txbuf;
1247 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1249 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1250 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1251 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1256 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1258 static inline bool before(u32 seq1, u32 seq2)
1260 return (s32)(seq1 - seq2) < 0;
1262 static inline bool before_eq(u32 seq1, u32 seq2)
1264 return (s32)(seq1 - seq2) <= 0;
1266 static inline bool after(u32 seq1, u32 seq2)
1268 return (s32)(seq1 - seq2) > 0;
1270 static inline bool after_eq(u32 seq1, u32 seq2)
1272 return (s32)(seq1 - seq2) >= 0;
1278 extern unsigned int rxrpc_debug;
1280 #define dbgprintk(FMT,...) \
1281 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1283 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1284 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1285 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1288 #if defined(__KDEBUG)
1289 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1290 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1291 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1293 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1294 #define RXRPC_DEBUG_KENTER 0x01
1295 #define RXRPC_DEBUG_KLEAVE 0x02
1296 #define RXRPC_DEBUG_KDEBUG 0x04
1298 #define _enter(FMT,...) \
1300 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1301 kenter(FMT,##__VA_ARGS__); \
1304 #define _leave(FMT,...) \
1306 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1307 kleave(FMT,##__VA_ARGS__); \
1310 #define _debug(FMT,...) \
1312 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1313 kdebug(FMT,##__VA_ARGS__); \
1317 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1318 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1319 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1323 * debug assertion checking
1325 #if 1 // defined(__KDEBUGALL)
1329 if (unlikely(!(X))) { \
1330 pr_err("Assertion failed\n"); \
1335 #define ASSERTCMP(X, OP, Y) \
1337 __typeof__(X) _x = (X); \
1338 __typeof__(Y) _y = (__typeof__(X))(Y); \
1339 if (unlikely(!(_x OP _y))) { \
1340 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1341 (unsigned long)_x, (unsigned long)_x, #OP, \
1342 (unsigned long)_y, (unsigned long)_y); \
1347 #define ASSERTIF(C, X) \
1349 if (unlikely((C) && !(X))) { \
1350 pr_err("Assertion failed\n"); \
1355 #define ASSERTIFCMP(C, X, OP, Y) \
1357 __typeof__(X) _x = (X); \
1358 __typeof__(Y) _y = (__typeof__(X))(Y); \
1359 if (unlikely((C) && !(_x OP _y))) { \
1360 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1361 (unsigned long)_x, (unsigned long)_x, #OP, \
1362 (unsigned long)_y, (unsigned long)_y); \
1373 #define ASSERTCMP(X, OP, Y) \
1377 #define ASSERTIF(C, X) \
1381 #define ASSERTIFCMP(C, X, OP, Y) \
1385 #endif /* __KDEBUGALL */