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 bundle_proc_list; /* List of bundles for proc */
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;
80 atomic_t nr_client_conns;
82 struct hlist_head local_endpoints;
83 struct mutex local_mutex; /* Lock for ->local_endpoints */
85 DECLARE_HASHTABLE (peer_hash, 10);
86 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
88 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
89 u8 peer_keepalive_cursor;
90 time64_t peer_keepalive_base;
91 struct list_head peer_keepalive[32];
92 struct list_head peer_keepalive_new;
93 struct timer_list peer_keepalive_timer;
94 struct work_struct peer_keepalive_work;
96 atomic_t stat_tx_data;
97 atomic_t stat_tx_data_retrans;
98 atomic_t stat_tx_data_send;
99 atomic_t stat_tx_data_send_frag;
100 atomic_t stat_tx_data_send_fail;
101 atomic_t stat_tx_data_underflow;
102 atomic_t stat_tx_data_cwnd_reset;
103 atomic_t stat_rx_data;
104 atomic_t stat_rx_data_reqack;
105 atomic_t stat_rx_data_jumbo;
107 atomic_t stat_tx_ack_fill;
108 atomic_t stat_tx_ack_send;
109 atomic_t stat_tx_ack_skip;
110 atomic_t stat_tx_acks[256];
111 atomic_t stat_rx_acks[256];
113 atomic_t stat_why_req_ack[8];
115 atomic_t stat_io_loop;
119 * Service backlog preallocation.
121 * This contains circular buffers of preallocated peers, connections and calls
122 * for incoming service calls and their head and tail pointers. This allows
123 * calls to be set up in the data_ready handler, thereby avoiding the need to
124 * shuffle packets around so much.
126 struct rxrpc_backlog {
127 unsigned short peer_backlog_head;
128 unsigned short peer_backlog_tail;
129 unsigned short conn_backlog_head;
130 unsigned short conn_backlog_tail;
131 unsigned short call_backlog_head;
132 unsigned short call_backlog_tail;
133 #define RXRPC_BACKLOG_MAX 32
134 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
135 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
136 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
140 * RxRPC socket definition
143 /* WARNING: sk has to be the first member */
145 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
146 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
147 struct rxrpc_local *local; /* local endpoint */
148 struct rxrpc_backlog *backlog; /* Preallocation for services */
149 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
150 struct list_head sock_calls; /* List of calls owned by this socket */
151 struct list_head to_be_accepted; /* calls awaiting acceptance */
152 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
153 spinlock_t recvmsg_lock; /* Lock for recvmsg_q */
154 struct key *key; /* security for this socket */
155 struct key *securities; /* list of server security descriptors */
156 struct rb_root calls; /* User ID -> call mapping */
158 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
159 rwlock_t call_lock; /* lock for calls */
160 u32 min_sec_level; /* minimum security level */
161 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
162 bool exclusive; /* Exclusive connection for a client socket */
163 u16 second_service; /* Additional service bound to the endpoint */
165 /* Service upgrade information */
166 u16 from; /* Service ID to upgrade (if not 0) */
167 u16 to; /* service ID to upgrade to */
169 sa_family_t family; /* Protocol family created with */
170 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
171 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
174 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
177 * CPU-byteorder normalised Rx packet header.
179 struct rxrpc_host_header {
180 u32 epoch; /* client boot timestamp */
181 u32 cid; /* connection and channel ID */
182 u32 callNumber; /* call ID (0 for connection-level packets) */
183 u32 seq; /* sequence number of pkt in call stream */
184 u32 serial; /* serial number of pkt sent to network */
185 u8 type; /* packet type */
186 u8 flags; /* packet flags */
187 u8 userStatus; /* app-layer defined status */
188 u8 securityIndex; /* security protocol ID */
190 u16 _rsvd; /* reserved */
191 u16 cksum; /* kerberos security checksum */
193 u16 serviceId; /* service ID */
197 * RxRPC socket buffer private variables
198 * - max 48 bytes (struct sk_buff::cb)
200 struct rxrpc_skb_priv {
201 struct rxrpc_connection *conn; /* Connection referred to (poke packet) */
204 u16 offset; /* Offset of data */
205 u16 len; /* Length of data */
207 #define RXRPC_RX_VERIFIED 0x01
210 rxrpc_seq_t first_ack; /* First packet in acks table */
211 u8 nr_acks; /* Number of acks+nacks */
212 u8 nr_nacks; /* Number of nacks */
215 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
218 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
221 * RxRPC security module interface
223 struct rxrpc_security {
224 const char *name; /* name of this service */
225 u8 security_index; /* security type provided */
226 u32 no_key_abort; /* Abort code indicating no key */
228 /* Initialise a security service */
231 /* Clean up a security service */
234 /* Parse the information from a server key */
235 int (*preparse_server_key)(struct key_preparsed_payload *);
237 /* Clean up the preparse buffer after parsing a server key */
238 void (*free_preparse_server_key)(struct key_preparsed_payload *);
240 /* Destroy the payload of a server key */
241 void (*destroy_server_key)(struct key *);
243 /* Describe a server key */
244 void (*describe_server_key)(const struct key *, struct seq_file *);
246 /* initialise a connection's security */
247 int (*init_connection_security)(struct rxrpc_connection *,
248 struct rxrpc_key_token *);
250 /* Work out how much data we can store in a packet, given an estimate
251 * of the amount of data remaining.
253 int (*how_much_data)(struct rxrpc_call *, size_t,
254 size_t *, size_t *, size_t *);
256 /* impose security on a packet */
257 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
259 /* verify the security on a received packet */
260 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
262 /* Free crypto request on a call */
263 void (*free_call_crypto)(struct rxrpc_call *);
265 /* issue a challenge */
266 int (*issue_challenge)(struct rxrpc_connection *);
268 /* respond to a challenge */
269 int (*respond_to_challenge)(struct rxrpc_connection *,
272 /* verify a response */
273 int (*verify_response)(struct rxrpc_connection *,
276 /* clear connection security */
277 void (*clear)(struct rxrpc_connection *);
281 * RxRPC local transport endpoint description
282 * - owned by a single AF_RXRPC socket
283 * - pointed to by transport socket struct sk_user_data
287 atomic_t active_users; /* Number of users of the local endpoint */
288 refcount_t ref; /* Number of references to the structure */
289 struct net *net; /* The network namespace */
290 struct rxrpc_net *rxnet; /* Our bits in the network namespace */
291 struct hlist_node link;
292 struct socket *socket; /* my UDP socket */
293 struct task_struct *io_thread;
294 struct completion io_thread_ready; /* Indication that the I/O thread started */
295 struct rxrpc_sock *service; /* Service(s) listening on this endpoint */
296 #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY
297 struct sk_buff_head rx_delay_queue; /* Delay injection queue */
299 struct sk_buff_head rx_queue; /* Received packets */
300 struct list_head conn_attend_q; /* Conns requiring immediate attention */
301 struct list_head call_attend_q; /* Calls requiring immediate attention */
303 struct rb_root client_bundles; /* Client connection bundles by socket params */
304 spinlock_t client_bundles_lock; /* Lock for client_bundles */
305 bool kill_all_client_conns;
306 struct list_head idle_client_conns;
307 struct timer_list client_conn_reap_timer;
308 unsigned long client_conn_flags;
309 #define RXRPC_CLIENT_CONN_REAP_TIMER 0 /* The client conn reap timer expired */
311 spinlock_t lock; /* access lock */
312 rwlock_t services_lock; /* lock for services list */
313 int debug_id; /* debug ID for printks */
315 bool service_closed; /* Service socket closed */
316 struct idr conn_ids; /* List of connection IDs */
317 struct list_head new_client_calls; /* Newly created client calls need connection */
318 spinlock_t client_call_lock; /* Lock for ->new_client_calls */
319 struct sockaddr_rxrpc srx; /* local address */
323 * RxRPC remote transport endpoint definition
324 * - matched by local endpoint, remote port, address and protocol type
327 struct rcu_head rcu; /* This must be first */
329 unsigned long hash_key;
330 struct hlist_node hash_link;
331 struct rxrpc_local *local;
332 struct hlist_head error_targets; /* targets for net error distribution */
333 struct rb_root service_conns; /* Service connections */
334 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
335 time64_t last_tx_at; /* Last time packet sent here */
336 seqlock_t service_conn_lock;
337 spinlock_t lock; /* access lock */
338 unsigned int if_mtu; /* interface MTU for this peer */
339 unsigned int mtu; /* network MTU for this peer */
340 unsigned int maxdata; /* data size (MTU - hdrsize) */
341 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
342 int debug_id; /* debug ID for printks */
343 struct sockaddr_rxrpc srx; /* remote address */
345 /* calculated RTT cache */
346 #define RXRPC_RTT_CACHE_SIZE 32
347 spinlock_t rtt_input_lock; /* RTT lock for input routine */
348 ktime_t rtt_last_req; /* Time of last RTT request */
349 unsigned int rtt_count; /* Number of samples we've got */
351 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
352 u32 mdev_us; /* medium deviation */
353 u32 mdev_max_us; /* maximal mdev for the last rtt period */
354 u32 rttvar_us; /* smoothed mdev_max */
355 u32 rto_j; /* Retransmission timeout in jiffies */
356 u8 backoff; /* Backoff timeout */
358 u8 cong_ssthresh; /* Congestion slow-start threshold */
362 * Keys for matching a connection.
364 struct rxrpc_conn_proto {
367 u32 epoch; /* epoch of this connection */
368 u32 cid; /* connection ID */
374 struct rxrpc_conn_parameters {
375 struct rxrpc_local *local; /* Representation of local endpoint */
376 struct rxrpc_peer *peer; /* Representation of remote endpoint */
377 struct key *key; /* Security details */
378 bool exclusive; /* T if conn is exclusive */
379 bool upgrade; /* T if service ID can be upgraded */
380 u16 service_id; /* Service ID for this connection */
381 u32 security_level; /* Security level selected */
385 * Call completion condition (state == RXRPC_CALL_COMPLETE).
387 enum rxrpc_call_completion {
388 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
389 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
390 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
391 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
392 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
393 NR__RXRPC_CALL_COMPLETIONS
397 * Bits in the connection flags.
399 enum rxrpc_conn_flag {
400 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
401 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
402 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
403 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
404 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
405 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
406 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
409 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
410 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
411 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
412 (1UL << RXRPC_CONN_FINAL_ACK_3))
415 * Events that can be raised upon a connection.
417 enum rxrpc_conn_event {
418 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
419 RXRPC_CONN_EV_ABORT_CALLS, /* Abort attached calls */
423 * The connection protocol state.
425 enum rxrpc_conn_proto_state {
426 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
427 RXRPC_CONN_CLIENT_UNSECURED, /* Client connection needs security init */
428 RXRPC_CONN_CLIENT, /* Client connection */
429 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
430 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
431 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
432 RXRPC_CONN_SERVICE, /* Service secured connection */
433 RXRPC_CONN_ABORTED, /* Conn aborted */
434 RXRPC_CONN__NR_STATES
438 * RxRPC client connection bundle.
440 struct rxrpc_bundle {
441 struct rxrpc_local *local; /* Representation of local endpoint */
442 struct rxrpc_peer *peer; /* Remote endpoint */
443 struct key *key; /* Security details */
444 struct list_head proc_link; /* Link in net->bundle_proc_list */
445 const struct rxrpc_security *security; /* applied security module */
447 atomic_t active; /* Number of active users */
448 unsigned int debug_id;
449 u32 security_level; /* Security level selected */
450 u16 service_id; /* Service ID for this connection */
451 bool try_upgrade; /* True if the bundle is attempting upgrade */
452 bool exclusive; /* T if conn is exclusive */
453 bool upgrade; /* T if service ID can be upgraded */
454 unsigned short alloc_error; /* Error from last conn allocation */
455 struct rb_node local_node; /* Node in local->client_conns */
456 struct list_head waiting_calls; /* Calls waiting for channels */
457 unsigned long avail_chans; /* Mask of available channels */
458 unsigned int conn_ids[4]; /* Connection IDs. */
459 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
463 * RxRPC connection definition
464 * - matched by { local, peer, epoch, conn_id, direction }
465 * - each connection can only handle four simultaneous calls
467 struct rxrpc_connection {
468 struct rxrpc_conn_proto proto;
469 struct rxrpc_local *local; /* Representation of local endpoint */
470 struct rxrpc_peer *peer; /* Remote endpoint */
471 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
472 struct key *key; /* Security details */
473 struct list_head attend_link; /* Link in local->conn_attend_q */
476 atomic_t active; /* Active count for service conns */
478 struct list_head cache_link;
480 unsigned char act_chans; /* Mask of active channels */
481 struct rxrpc_channel {
482 unsigned long final_ack_at; /* Time at which to issue final ACK */
483 struct rxrpc_call *call; /* Active call */
484 unsigned int call_debug_id; /* call->debug_id */
485 u32 call_id; /* ID of current call */
486 u32 call_counter; /* Call ID counter */
487 u32 last_call; /* ID of last call */
488 u8 last_type; /* Type of last packet */
493 } channels[RXRPC_MAXCALLS];
495 struct timer_list timer; /* Conn event timer */
496 struct work_struct processor; /* connection event processor */
497 struct work_struct destructor; /* In-process-context destroyer */
498 struct rxrpc_bundle *bundle; /* Client connection bundle */
499 struct rb_node service_node; /* Node in peer->service_conns */
500 struct list_head proc_link; /* link in procfs list */
501 struct list_head link; /* link in master connection list */
502 struct sk_buff_head rx_queue; /* received conn-level packets */
504 struct mutex security_lock; /* Lock for security management */
505 const struct rxrpc_security *security; /* applied security module */
508 struct crypto_sync_skcipher *cipher; /* encryption handle */
509 struct rxrpc_crypt csum_iv; /* packet checksum base */
510 u32 nonce; /* response re-use preventer */
514 unsigned long events;
515 unsigned long idle_timestamp; /* Time at which last became idle */
516 spinlock_t state_lock; /* state-change lock */
517 enum rxrpc_conn_proto_state state; /* current state of connection */
518 enum rxrpc_call_completion completion; /* Completion condition */
519 s32 abort_code; /* Abort code of connection abort */
520 int debug_id; /* debug ID for printks */
521 rxrpc_serial_t tx_serial; /* Outgoing packet serial number counter */
522 unsigned int hi_serial; /* highest serial number received */
523 u32 service_id; /* Service ID, possibly upgraded */
524 u32 security_level; /* Security level selected */
525 u8 security_ix; /* security type */
526 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
527 u8 bundle_shift; /* Index into bundle->avail_chans */
528 bool exclusive; /* T if conn is exclusive */
529 bool upgrade; /* T if service ID can be upgraded */
530 u16 orig_service_id; /* Originally requested service ID */
531 short error; /* Local error code */
534 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
536 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
539 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
541 return !rxrpc_to_server(sp);
545 * Flags in call->flags.
547 enum rxrpc_call_flag {
548 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
549 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
550 RXRPC_CALL_IS_SERVICE, /* Call is service call */
551 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
552 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
553 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
554 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
555 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
556 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
557 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
558 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
559 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
560 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
561 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
562 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */
563 RXRPC_CALL_RX_IS_IDLE, /* recvmsg() is idle - send an ACK */
564 RXRPC_CALL_RECVMSG_READ_ALL, /* recvmsg() read all of the received data */
568 * Events that can be raised on a call.
570 enum rxrpc_call_event {
571 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
572 RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */
576 * The states that a call can be in.
578 enum rxrpc_call_state {
579 RXRPC_CALL_UNINITIALISED,
580 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
581 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
582 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
583 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
584 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
585 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
586 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
587 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
588 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
589 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
590 RXRPC_CALL_COMPLETE, /* - call complete */
591 NR__RXRPC_CALL_STATES
595 * Call Tx congestion management modes.
597 enum rxrpc_congest_mode {
598 RXRPC_CALL_SLOW_START,
599 RXRPC_CALL_CONGEST_AVOIDANCE,
600 RXRPC_CALL_PACKET_LOSS,
601 RXRPC_CALL_FAST_RETRANSMIT,
602 NR__RXRPC_CONGEST_MODES
606 * RxRPC call definition
607 * - matched by { connection, call_id }
611 struct rxrpc_connection *conn; /* connection carrying call */
612 struct rxrpc_bundle *bundle; /* Connection bundle to use */
613 struct rxrpc_peer *peer; /* Peer record for remote address */
614 struct rxrpc_local *local; /* Representation of local endpoint */
615 struct rxrpc_sock __rcu *socket; /* socket responsible */
616 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
617 struct key *key; /* Security details */
618 const struct rxrpc_security *security; /* applied security module */
619 struct mutex user_mutex; /* User access mutex */
620 struct sockaddr_rxrpc dest_srx; /* Destination address */
621 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
622 unsigned long ack_lost_at; /* When ACK is figured as lost */
623 unsigned long resend_at; /* When next resend needs to happen */
624 unsigned long ping_at; /* When next to send a ping */
625 unsigned long keepalive_at; /* When next to send a keepalive ping */
626 unsigned long expect_rx_by; /* When we expect to get a packet by */
627 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
628 unsigned long expect_term_by; /* When we expect call termination by */
629 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
630 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
631 u32 hard_timo; /* Maximum lifetime or 0 (jif) */
632 struct timer_list timer; /* Combined event timer */
633 struct work_struct destroyer; /* In-process-context destroyer */
634 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
635 struct list_head link; /* link in master call list */
636 struct list_head wait_link; /* Link in local->new_client_calls */
637 struct hlist_node error_link; /* link in error distribution list */
638 struct list_head accept_link; /* Link in rx->acceptq */
639 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
640 struct list_head sock_link; /* Link in rx->sock_calls */
641 struct rb_node sock_node; /* Node in rx->calls */
642 struct list_head attend_link; /* Link in local->call_attend_q */
643 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
644 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
645 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
646 unsigned long user_call_ID; /* user-defined call ID */
648 unsigned long events;
649 spinlock_t notify_lock; /* Kernel notification lock */
650 unsigned int send_abort_why; /* Why the abort [enum rxrpc_abort_reason] */
651 s32 send_abort; /* Abort code to be sent */
652 short send_abort_err; /* Error to be associated with the abort */
653 rxrpc_seq_t send_abort_seq; /* DATA packet that incurred the abort (or 0) */
654 s32 abort_code; /* Local/remote abort code */
655 int error; /* Local error incurred */
656 enum rxrpc_call_state _state; /* Current state of call (needs barrier) */
657 enum rxrpc_call_completion completion; /* Call completion condition */
659 u8 security_ix; /* Security type */
660 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
661 u32 call_id; /* call ID on connection */
662 u32 cid; /* connection ID plus channel index */
663 u32 security_level; /* Security level selected */
664 int debug_id; /* debug ID for printks */
665 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
666 unsigned short rx_pkt_len; /* Current recvmsg packet len */
668 /* Transmitted data tracking. */
669 spinlock_t tx_lock; /* Transmit queue lock */
670 struct list_head tx_sendmsg; /* Sendmsg prepared packets */
671 struct list_head tx_buffer; /* Buffer of transmissible packets */
672 rxrpc_seq_t tx_bottom; /* First packet in buffer */
673 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
674 rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */
675 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
676 u16 tx_backoff; /* Delay to insert due to Tx failure */
677 u8 tx_winsize; /* Maximum size of Tx window */
678 #define RXRPC_TX_MAX_WINDOW 128
679 ktime_t tx_last_sent; /* Last time a transmission occurred */
681 /* Received data tracking */
682 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
683 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */
685 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */
686 rxrpc_seq_t rx_consumed; /* Highest packet consumed */
687 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
688 u8 rx_winsize; /* Size of Rx window */
690 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
691 * is fixed, we keep these numbers in terms of segments (ie. DATA
692 * packets) rather than bytes.
694 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
695 #define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4)
696 u8 cong_cwnd; /* Congestion window size */
697 u8 cong_extra; /* Extra to send for congestion management */
698 u8 cong_ssthresh; /* Slow-start threshold */
699 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
700 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
701 u8 cong_cumul_acks; /* Cumulative ACK count */
702 ktime_t cong_tstamp; /* Last time cwnd was changed */
703 struct sk_buff *cong_last_nack; /* Last ACK with nacks received */
705 /* Receive-phase ACK management (ACKs we send). */
706 u8 ackr_reason; /* reason to ACK */
707 u16 ackr_sack_base; /* Starting slot in SACK table ring */
708 rxrpc_seq_t ackr_window; /* Base of SACK window */
709 rxrpc_seq_t ackr_wtop; /* Base of SACK window */
710 unsigned int ackr_nr_unacked; /* Number of unacked packets */
711 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
713 #define RXRPC_SACK_SIZE 256
714 /* SACK table for soft-acked packets */
715 u8 ackr_sack_table[RXRPC_SACK_SIZE];
719 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
720 ktime_t rtt_sent_at[4]; /* Time packet sent */
721 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
722 * Mask of pending samples in 8-11 */
723 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
724 #define RXRPC_CALL_RTT_PEND_SHIFT 8
726 /* Transmission-phase ACK management (ACKs we've received). */
727 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
728 rxrpc_seq_t acks_first_seq; /* first sequence number received */
729 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
730 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
731 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
732 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
736 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
738 struct rxrpc_ack_summary {
739 u16 nr_acks; /* Number of ACKs in packet */
740 u16 nr_new_acks; /* Number of new ACKs in packet */
741 u16 nr_new_nacks; /* Number of new nacks in packet */
742 u16 nr_retained_nacks; /* Number of nacks retained between ACKs */
744 bool saw_nacks; /* Saw NACKs in packet */
745 bool new_low_nack; /* T if new low NACK found */
746 bool retrans_timeo; /* T if reTx due to timeout happened */
747 u8 flight_size; /* Number of unreceived transmissions */
748 /* Place to stash values for tracing */
749 enum rxrpc_congest_mode mode:8;
757 * sendmsg() cmsg-specified parameters.
760 RXRPC_CMD_SEND_DATA, /* send data message */
761 RXRPC_CMD_SEND_ABORT, /* request abort generation */
762 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
763 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
766 struct rxrpc_call_params {
767 s64 tx_total_len; /* Total Tx data length (if send data) */
768 unsigned long user_call_ID; /* User's call ID */
770 u32 hard; /* Maximum lifetime (sec) */
771 u32 idle; /* Max time since last data packet (msec) */
772 u32 normal; /* Max time since last call packet (msec) */
774 u8 nr_timeouts; /* Number of timeouts specified */
775 bool kernel; /* T if kernel is making the call */
776 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
779 struct rxrpc_send_params {
780 struct rxrpc_call_params call;
781 u32 abort_code; /* Abort code to Tx (if abort) */
782 enum rxrpc_command command : 8; /* The command to implement */
783 bool exclusive; /* Shared or exclusive call */
784 bool upgrade; /* If the connection is upgradeable */
788 * Buffer of data to be output as a packet.
792 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
793 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
794 ktime_t last_sent; /* Time at which last transmitted */
796 rxrpc_seq_t seq; /* Sequence number of this packet */
797 unsigned int call_debug_id;
798 unsigned int debug_id;
799 unsigned int len; /* Amount of data in buffer */
800 unsigned int space; /* Remaining data space */
801 unsigned int offset; /* Offset of fill point */
803 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
804 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
805 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
807 /* The packet for encrypting and DMA'ing. We align it such
808 * that data[] aligns correctly for any crypto blocksize.
810 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
811 struct rxrpc_wire_header wire; /* Network-ready header */
813 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
815 struct rxrpc_ackpacket ack;
816 DECLARE_FLEX_ARRAY(u8, acks);
822 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
824 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
827 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
829 return !rxrpc_sending_to_server(txb);
832 #include <trace/events/rxrpc.h>
835 * Allocate the next serial number on a connection. 0 must be skipped.
837 static inline rxrpc_serial_t rxrpc_get_next_serial(struct rxrpc_connection *conn)
839 rxrpc_serial_t serial;
841 serial = conn->tx_serial;
844 conn->tx_serial = serial + 1;
851 extern atomic_t rxrpc_n_rx_skbs;
852 extern struct workqueue_struct *rxrpc_workqueue;
857 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
858 void rxrpc_discard_prealloc(struct rxrpc_sock *);
859 bool rxrpc_new_incoming_call(struct rxrpc_local *local,
860 struct rxrpc_peer *peer,
861 struct rxrpc_connection *conn,
862 struct sockaddr_rxrpc *peer_srx,
863 struct sk_buff *skb);
864 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
865 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
870 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
871 enum rxrpc_propose_ack_trace why);
872 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
873 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
874 enum rxrpc_propose_ack_trace);
875 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
876 void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb);
878 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
879 unsigned long expire_at,
881 enum rxrpc_timer_trace why);
883 bool rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb);
888 extern const char *const rxrpc_call_states[];
889 extern const char *const rxrpc_call_completions[];
890 extern struct kmem_cache *rxrpc_call_jar;
892 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what);
893 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
894 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
895 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
896 struct rxrpc_conn_parameters *,
897 struct rxrpc_call_params *, gfp_t,
899 void rxrpc_start_call_timer(struct rxrpc_call *call);
900 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
902 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
903 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
904 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
905 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
906 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
907 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
908 void rxrpc_cleanup_call(struct rxrpc_call *);
909 void rxrpc_destroy_all_calls(struct rxrpc_net *);
911 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
913 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
916 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
918 return !rxrpc_is_service_call(call);
924 bool rxrpc_set_call_completion(struct rxrpc_call *call,
925 enum rxrpc_call_completion compl,
928 bool rxrpc_call_completed(struct rxrpc_call *call);
929 bool rxrpc_abort_call(struct rxrpc_call *call, rxrpc_seq_t seq,
930 u32 abort_code, int error, enum rxrpc_abort_reason why);
931 void rxrpc_prefail_call(struct rxrpc_call *call, enum rxrpc_call_completion compl,
934 static inline void rxrpc_set_call_state(struct rxrpc_call *call,
935 enum rxrpc_call_state state)
937 /* Order write of completion info before write of ->state. */
938 smp_store_release(&call->_state, state);
939 wake_up(&call->waitq);
942 static inline enum rxrpc_call_state __rxrpc_call_state(const struct rxrpc_call *call)
944 return call->_state; /* Only inside I/O thread */
947 static inline bool __rxrpc_call_is_complete(const struct rxrpc_call *call)
949 return __rxrpc_call_state(call) == RXRPC_CALL_COMPLETE;
952 static inline enum rxrpc_call_state rxrpc_call_state(const struct rxrpc_call *call)
954 /* Order read ->state before read of completion info. */
955 return smp_load_acquire(&call->_state);
958 static inline bool rxrpc_call_is_complete(const struct rxrpc_call *call)
960 return rxrpc_call_state(call) == RXRPC_CALL_COMPLETE;
963 static inline bool rxrpc_call_has_failed(const struct rxrpc_call *call)
965 return rxrpc_call_is_complete(call) && call->completion != RXRPC_CALL_SUCCEEDED;
971 extern unsigned int rxrpc_reap_client_connections;
972 extern unsigned long rxrpc_conn_idle_client_expiry;
973 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
975 void rxrpc_purge_client_connections(struct rxrpc_local *local);
976 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
977 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
978 int rxrpc_look_up_bundle(struct rxrpc_call *call, gfp_t gfp);
979 void rxrpc_connect_client_calls(struct rxrpc_local *local);
980 void rxrpc_expose_client_call(struct rxrpc_call *);
981 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
982 void rxrpc_deactivate_bundle(struct rxrpc_bundle *bundle);
983 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
984 void rxrpc_discard_expired_client_conns(struct rxrpc_local *local);
985 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
990 void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, struct sk_buff *skb,
991 unsigned int channel);
992 int rxrpc_abort_conn(struct rxrpc_connection *conn, struct sk_buff *skb,
993 s32 abort_code, int err, enum rxrpc_abort_reason why);
994 void rxrpc_process_connection(struct work_struct *);
995 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
996 bool rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb);
997 void rxrpc_input_conn_event(struct rxrpc_connection *conn, struct sk_buff *skb);
999 static inline bool rxrpc_is_conn_aborted(const struct rxrpc_connection *conn)
1001 /* Order reading the abort info after the state check. */
1002 return smp_load_acquire(&conn->state) == RXRPC_CONN_ABORTED;
1008 extern unsigned int rxrpc_connection_expiry;
1009 extern unsigned int rxrpc_closed_conn_expiry;
1011 void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why);
1012 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
1013 struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *,
1014 struct sockaddr_rxrpc *,
1016 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
1017 void rxrpc_disconnect_call(struct rxrpc_call *);
1018 void rxrpc_kill_client_conn(struct rxrpc_connection *);
1019 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
1020 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
1021 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
1022 enum rxrpc_conn_trace);
1023 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
1024 enum rxrpc_conn_trace);
1025 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
1026 void rxrpc_service_connection_reaper(struct work_struct *);
1027 void rxrpc_destroy_all_connections(struct rxrpc_net *);
1029 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
1031 return conn->out_clientflag;
1034 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
1036 return !rxrpc_conn_is_client(conn);
1039 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
1040 unsigned long expire_at)
1042 timer_reduce(&conn->timer, expire_at);
1048 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
1050 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
1051 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
1052 const struct rxrpc_security *, struct sk_buff *);
1053 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
1058 void rxrpc_congestion_degrade(struct rxrpc_call *);
1059 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
1060 void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *);
1065 int rxrpc_encap_rcv(struct sock *, struct sk_buff *);
1066 void rxrpc_error_report(struct sock *);
1067 bool rxrpc_direct_abort(struct sk_buff *skb, enum rxrpc_abort_reason why,
1068 s32 abort_code, int err);
1069 int rxrpc_io_thread(void *data);
1070 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local)
1072 wake_up_process(local->io_thread);
1075 static inline bool rxrpc_protocol_error(struct sk_buff *skb, enum rxrpc_abort_reason why)
1077 return rxrpc_direct_abort(skb, why, RX_PROTOCOL_ERROR, -EPROTO);
1083 extern const struct rxrpc_security rxrpc_no_security;
1088 extern struct key_type key_type_rxrpc;
1090 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
1091 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
1097 void rxrpc_gen_version_string(void);
1098 void rxrpc_send_version_request(struct rxrpc_local *local,
1099 struct rxrpc_host_header *hdr,
1100 struct sk_buff *skb);
1105 void rxrpc_local_dont_fragment(const struct rxrpc_local *local, bool set);
1106 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1107 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
1108 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
1109 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
1110 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
1111 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
1112 void rxrpc_destroy_local(struct rxrpc_local *local);
1113 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1115 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1116 enum rxrpc_local_trace why)
1120 r = refcount_read(&local->ref);
1121 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1122 trace_rxrpc_local(local->debug_id, why, r, u);
1126 static inline void rxrpc_see_local(struct rxrpc_local *local,
1127 enum rxrpc_local_trace why)
1131 r = refcount_read(&local->ref);
1132 u = atomic_read(&local->active_users);
1133 trace_rxrpc_local(local->debug_id, why, r, u);
1139 extern unsigned int rxrpc_max_backlog __read_mostly;
1140 extern unsigned long rxrpc_soft_ack_delay;
1141 extern unsigned long rxrpc_idle_ack_delay;
1142 extern unsigned int rxrpc_rx_window_size;
1143 extern unsigned int rxrpc_rx_mtu;
1144 extern unsigned int rxrpc_rx_jumbo_max;
1145 #ifdef CONFIG_AF_RXRPC_INJECT_RX_DELAY
1146 extern unsigned long rxrpc_inject_rx_delay;
1152 extern unsigned int rxrpc_net_id;
1153 extern struct pernet_operations rxrpc_net_ops;
1155 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1157 return net_generic(net, rxrpc_net_id);
1163 int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1164 int rxrpc_send_abort_packet(struct rxrpc_call *);
1165 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1166 void rxrpc_send_conn_abort(struct rxrpc_connection *conn);
1167 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb);
1168 void rxrpc_send_keepalive(struct rxrpc_peer *);
1169 void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1174 void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *);
1175 void rxrpc_peer_keepalive_worker(struct work_struct *);
1180 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1181 const struct sockaddr_rxrpc *);
1182 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
1183 struct sockaddr_rxrpc *srx, gfp_t gfp);
1184 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
1185 enum rxrpc_peer_trace);
1186 void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer);
1187 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1188 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1189 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1190 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1195 extern const struct seq_operations rxrpc_call_seq_ops;
1196 extern const struct seq_operations rxrpc_connection_seq_ops;
1197 extern const struct seq_operations rxrpc_bundle_seq_ops;
1198 extern const struct seq_operations rxrpc_peer_seq_ops;
1199 extern const struct seq_operations rxrpc_local_seq_ops;
1204 void rxrpc_notify_socket(struct rxrpc_call *);
1205 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1208 * Abort a call due to a protocol error.
1210 static inline int rxrpc_abort_eproto(struct rxrpc_call *call,
1211 struct sk_buff *skb,
1213 enum rxrpc_abort_reason why)
1215 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1217 rxrpc_abort_call(call, sp->hdr.seq, abort_code, -EPROTO, why);
1224 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1225 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1226 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1227 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1233 extern const struct rxrpc_security rxkad;
1239 int __init rxrpc_init_security(void);
1240 const struct rxrpc_security *rxrpc_security_lookup(u8);
1241 void rxrpc_exit_security(void);
1242 int rxrpc_init_client_call_security(struct rxrpc_call *);
1243 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1244 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1246 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1247 struct sk_buff *, u32, u32);
1252 bool rxrpc_propose_abort(struct rxrpc_call *call, s32 abort_code, int error,
1253 enum rxrpc_abort_reason why);
1254 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1259 extern struct key_type key_type_rxrpc_s;
1261 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1266 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1267 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1268 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1269 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1270 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1271 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1272 void rxrpc_purge_queue(struct sk_buff_head *);
1277 int rxrpc_stats_show(struct seq_file *seq, void *v);
1278 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1280 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1281 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1286 #ifdef CONFIG_SYSCTL
1287 extern int __init rxrpc_sysctl_init(void);
1288 extern void rxrpc_sysctl_exit(void);
1290 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1291 static inline void rxrpc_sysctl_exit(void) {}
1297 extern atomic_t rxrpc_nr_txbuf;
1298 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1300 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1301 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1302 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1307 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1309 static inline bool before(u32 seq1, u32 seq2)
1311 return (s32)(seq1 - seq2) < 0;
1313 static inline bool before_eq(u32 seq1, u32 seq2)
1315 return (s32)(seq1 - seq2) <= 0;
1317 static inline bool after(u32 seq1, u32 seq2)
1319 return (s32)(seq1 - seq2) > 0;
1321 static inline bool after_eq(u32 seq1, u32 seq2)
1323 return (s32)(seq1 - seq2) >= 0;
1329 extern unsigned int rxrpc_debug;
1331 #define dbgprintk(FMT,...) \
1332 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1334 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1335 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1336 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1339 #if defined(__KDEBUG)
1340 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1341 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1342 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1344 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1345 #define RXRPC_DEBUG_KENTER 0x01
1346 #define RXRPC_DEBUG_KLEAVE 0x02
1347 #define RXRPC_DEBUG_KDEBUG 0x04
1349 #define _enter(FMT,...) \
1351 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1352 kenter(FMT,##__VA_ARGS__); \
1355 #define _leave(FMT,...) \
1357 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1358 kleave(FMT,##__VA_ARGS__); \
1361 #define _debug(FMT,...) \
1363 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1364 kdebug(FMT,##__VA_ARGS__); \
1368 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1369 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1370 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1374 * debug assertion checking
1376 #if 1 // defined(__KDEBUGALL)
1380 if (unlikely(!(X))) { \
1381 pr_err("Assertion failed\n"); \
1386 #define ASSERTCMP(X, OP, Y) \
1388 __typeof__(X) _x = (X); \
1389 __typeof__(Y) _y = (__typeof__(X))(Y); \
1390 if (unlikely(!(_x OP _y))) { \
1391 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1392 (unsigned long)_x, (unsigned long)_x, #OP, \
1393 (unsigned long)_y, (unsigned long)_y); \
1398 #define ASSERTIF(C, X) \
1400 if (unlikely((C) && !(X))) { \
1401 pr_err("Assertion failed\n"); \
1406 #define ASSERTIFCMP(C, X, OP, Y) \
1408 __typeof__(X) _x = (X); \
1409 __typeof__(Y) _y = (__typeof__(X))(Y); \
1410 if (unlikely((C) && !(_x OP _y))) { \
1411 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1412 (unsigned long)_x, (unsigned long)_x, #OP, \
1413 (unsigned long)_y, (unsigned long)_y); \
1424 #define ASSERTCMP(X, OP, Y) \
1428 #define ASSERTIF(C, X) \
1432 #define ASSERTIFCMP(C, X, OP, Y) \
1436 #endif /* __KDEBUGALL */