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_REJECT_BUSY, /* Reject with BUSY */
42 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
46 * sk_state for RxRPC sockets
50 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
51 RXRPC_CLIENT_BOUND, /* client local address bound */
52 RXRPC_SERVER_BOUND, /* server local address bound */
53 RXRPC_SERVER_BOUND2, /* second server local address bound */
54 RXRPC_SERVER_LISTENING, /* server listening for connections */
55 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
56 RXRPC_CLOSE, /* socket is being closed */
60 * Per-network namespace data.
63 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
64 u32 epoch; /* Local epoch for detecting local-end reset */
65 struct list_head calls; /* List of calls active in this namespace */
66 spinlock_t call_lock; /* Lock for ->calls */
67 atomic_t nr_calls; /* Count of allocated calls */
70 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
71 struct list_head service_conns; /* Service conns in this namespace */
72 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
73 struct work_struct service_conn_reaper;
74 struct timer_list service_conn_reap_timer;
78 bool kill_all_client_conns;
79 atomic_t nr_client_conns;
80 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
81 struct mutex client_conn_discard_lock; /* Prevent multiple discarders */
82 struct list_head idle_client_conns;
83 struct work_struct client_conn_reaper;
84 struct timer_list client_conn_reap_timer;
86 struct hlist_head local_endpoints;
87 struct mutex local_mutex; /* Lock for ->local_endpoints */
89 DECLARE_HASHTABLE (peer_hash, 10);
90 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
92 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
93 u8 peer_keepalive_cursor;
94 time64_t peer_keepalive_base;
95 struct list_head peer_keepalive[32];
96 struct list_head peer_keepalive_new;
97 struct timer_list peer_keepalive_timer;
98 struct work_struct peer_keepalive_work;
100 atomic_t stat_tx_data;
101 atomic_t stat_tx_data_retrans;
102 atomic_t stat_tx_data_send;
103 atomic_t stat_tx_data_send_frag;
104 atomic_t stat_tx_data_send_fail;
105 atomic_t stat_tx_data_underflow;
106 atomic_t stat_tx_data_cwnd_reset;
107 atomic_t stat_rx_data;
108 atomic_t stat_rx_data_reqack;
109 atomic_t stat_rx_data_jumbo;
111 atomic_t stat_tx_ack_fill;
112 atomic_t stat_tx_ack_send;
113 atomic_t stat_tx_ack_skip;
114 atomic_t stat_tx_acks[256];
115 atomic_t stat_rx_acks[256];
117 atomic_t stat_why_req_ack[8];
119 atomic_t stat_io_loop;
123 * Service backlog preallocation.
125 * This contains circular buffers of preallocated peers, connections and calls
126 * for incoming service calls and their head and tail pointers. This allows
127 * calls to be set up in the data_ready handler, thereby avoiding the need to
128 * shuffle packets around so much.
130 struct rxrpc_backlog {
131 unsigned short peer_backlog_head;
132 unsigned short peer_backlog_tail;
133 unsigned short conn_backlog_head;
134 unsigned short conn_backlog_tail;
135 unsigned short call_backlog_head;
136 unsigned short call_backlog_tail;
137 #define RXRPC_BACKLOG_MAX 32
138 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
139 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
140 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
144 * RxRPC socket definition
147 /* WARNING: sk has to be the first member */
149 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
150 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
151 struct rxrpc_local *local; /* local endpoint */
152 struct rxrpc_backlog *backlog; /* Preallocation for services */
153 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
154 struct list_head sock_calls; /* List of calls owned by this socket */
155 struct list_head to_be_accepted; /* calls awaiting acceptance */
156 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
157 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
158 struct key *key; /* security for this socket */
159 struct key *securities; /* list of server security descriptors */
160 struct rb_root calls; /* User ID -> call mapping */
162 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
163 rwlock_t call_lock; /* lock for calls */
164 u32 min_sec_level; /* minimum security level */
165 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
166 bool exclusive; /* Exclusive connection for a client socket */
167 u16 second_service; /* Additional service bound to the endpoint */
169 /* Service upgrade information */
170 u16 from; /* Service ID to upgrade (if not 0) */
171 u16 to; /* service ID to upgrade to */
173 sa_family_t family; /* Protocol family created with */
174 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
175 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
178 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
181 * CPU-byteorder normalised Rx packet header.
183 struct rxrpc_host_header {
184 u32 epoch; /* client boot timestamp */
185 u32 cid; /* connection and channel ID */
186 u32 callNumber; /* call ID (0 for connection-level packets) */
187 u32 seq; /* sequence number of pkt in call stream */
188 u32 serial; /* serial number of pkt sent to network */
189 u8 type; /* packet type */
190 u8 flags; /* packet flags */
191 u8 userStatus; /* app-layer defined status */
192 u8 securityIndex; /* security protocol ID */
194 u16 _rsvd; /* reserved */
195 u16 cksum; /* kerberos security checksum */
197 u16 serviceId; /* service ID */
201 * RxRPC socket buffer private variables
202 * - max 48 bytes (struct sk_buff::cb)
204 struct rxrpc_skb_priv {
205 u16 offset; /* Offset of data */
206 u16 len; /* Length of data */
208 #define RXRPC_RX_VERIFIED 0x01
210 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
213 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
216 * RxRPC security module interface
218 struct rxrpc_security {
219 const char *name; /* name of this service */
220 u8 security_index; /* security type provided */
221 u32 no_key_abort; /* Abort code indicating no key */
223 /* Initialise a security service */
226 /* Clean up a security service */
229 /* Parse the information from a server key */
230 int (*preparse_server_key)(struct key_preparsed_payload *);
232 /* Clean up the preparse buffer after parsing a server key */
233 void (*free_preparse_server_key)(struct key_preparsed_payload *);
235 /* Destroy the payload of a server key */
236 void (*destroy_server_key)(struct key *);
238 /* Describe a server key */
239 void (*describe_server_key)(const struct key *, struct seq_file *);
241 /* initialise a connection's security */
242 int (*init_connection_security)(struct rxrpc_connection *,
243 struct rxrpc_key_token *);
245 /* Work out how much data we can store in a packet, given an estimate
246 * of the amount of data remaining.
248 int (*how_much_data)(struct rxrpc_call *, size_t,
249 size_t *, size_t *, size_t *);
251 /* impose security on a packet */
252 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
254 /* verify the security on a received packet */
255 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
257 /* Free crypto request on a call */
258 void (*free_call_crypto)(struct rxrpc_call *);
260 /* issue a challenge */
261 int (*issue_challenge)(struct rxrpc_connection *);
263 /* respond to a challenge */
264 int (*respond_to_challenge)(struct rxrpc_connection *,
268 /* verify a response */
269 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 rxrpc_net *rxnet; /* The network ns in which this resides */
287 struct hlist_node link;
288 struct socket *socket; /* my UDP socket */
289 struct task_struct *io_thread;
290 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
291 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
292 struct sk_buff_head rx_queue; /* Received packets */
293 struct list_head call_attend_q; /* Calls requiring immediate attention */
294 struct rb_root client_bundles; /* Client connection bundles by socket params */
295 spinlock_t client_bundles_lock; /* Lock for client_bundles */
296 spinlock_t lock; /* access lock */
297 rwlock_t services_lock; /* lock for services list */
298 int debug_id; /* debug ID for printks */
300 bool service_closed; /* Service socket closed */
301 struct sockaddr_rxrpc srx; /* local address */
305 * RxRPC remote transport endpoint definition
306 * - matched by local endpoint, remote port, address and protocol type
309 struct rcu_head rcu; /* This must be first */
311 unsigned long hash_key;
312 struct hlist_node hash_link;
313 struct rxrpc_local *local;
314 struct hlist_head error_targets; /* targets for net error distribution */
315 struct rb_root service_conns; /* Service connections */
316 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
317 time64_t last_tx_at; /* Last time packet sent here */
318 seqlock_t service_conn_lock;
319 spinlock_t lock; /* access lock */
320 unsigned int if_mtu; /* interface MTU for this peer */
321 unsigned int mtu; /* network MTU for this peer */
322 unsigned int maxdata; /* data size (MTU - hdrsize) */
323 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
324 int debug_id; /* debug ID for printks */
325 struct sockaddr_rxrpc srx; /* remote address */
327 /* calculated RTT cache */
328 #define RXRPC_RTT_CACHE_SIZE 32
329 spinlock_t rtt_input_lock; /* RTT lock for input routine */
330 ktime_t rtt_last_req; /* Time of last RTT request */
331 unsigned int rtt_count; /* Number of samples we've got */
333 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
334 u32 mdev_us; /* medium deviation */
335 u32 mdev_max_us; /* maximal mdev for the last rtt period */
336 u32 rttvar_us; /* smoothed mdev_max */
337 u32 rto_j; /* Retransmission timeout in jiffies */
338 u8 backoff; /* Backoff timeout */
340 u8 cong_ssthresh; /* Congestion slow-start threshold */
344 * Keys for matching a connection.
346 struct rxrpc_conn_proto {
349 u32 epoch; /* epoch of this connection */
350 u32 cid; /* connection ID */
356 struct rxrpc_conn_parameters {
357 struct rxrpc_local *local; /* Representation of local endpoint */
358 struct rxrpc_peer *peer; /* Remote endpoint */
359 struct key *key; /* Security details */
360 bool exclusive; /* T if conn is exclusive */
361 bool upgrade; /* T if service ID can be upgraded */
362 u16 service_id; /* Service ID for this connection */
363 u32 security_level; /* Security level selected */
367 * Bits in the connection flags.
369 enum rxrpc_conn_flag {
370 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
371 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
372 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
373 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
374 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
375 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
376 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
377 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
380 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
381 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
382 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
383 (1UL << RXRPC_CONN_FINAL_ACK_3))
386 * Events that can be raised upon a connection.
388 enum rxrpc_conn_event {
389 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
393 * The connection protocol state.
395 enum rxrpc_conn_proto_state {
396 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
397 RXRPC_CONN_CLIENT, /* Client connection */
398 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
399 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
400 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
401 RXRPC_CONN_SERVICE, /* Service secured connection */
402 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
403 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
404 RXRPC_CONN__NR_STATES
408 * RxRPC client connection bundle.
410 struct rxrpc_bundle {
411 struct rxrpc_local *local; /* Representation of local endpoint */
412 struct rxrpc_peer *peer; /* Remote endpoint */
413 struct key *key; /* Security details */
415 atomic_t active; /* Number of active users */
416 unsigned int debug_id;
417 u32 security_level; /* Security level selected */
418 u16 service_id; /* Service ID for this connection */
419 bool try_upgrade; /* True if the bundle is attempting upgrade */
420 bool alloc_conn; /* True if someone's getting a conn */
421 bool exclusive; /* T if conn is exclusive */
422 bool upgrade; /* T if service ID can be upgraded */
423 short alloc_error; /* Error from last conn allocation */
424 spinlock_t channel_lock;
425 struct rb_node local_node; /* Node in local->client_conns */
426 struct list_head waiting_calls; /* Calls waiting for channels */
427 unsigned long avail_chans; /* Mask of available channels */
428 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
432 * RxRPC connection definition
433 * - matched by { local, peer, epoch, conn_id, direction }
434 * - each connection can only handle four simultaneous calls
436 struct rxrpc_connection {
437 struct rxrpc_conn_proto proto;
438 struct rxrpc_local *local; /* Representation of local endpoint */
439 struct rxrpc_peer *peer; /* Remote endpoint */
440 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
441 struct key *key; /* Security details */
444 atomic_t active; /* Active count for service conns */
446 struct list_head cache_link;
448 unsigned char act_chans; /* Mask of active channels */
449 struct rxrpc_channel {
450 unsigned long final_ack_at; /* Time at which to issue final ACK */
451 struct rxrpc_call __rcu *call; /* Active call */
452 unsigned int call_debug_id; /* call->debug_id */
453 u32 call_id; /* ID of current call */
454 u32 call_counter; /* Call ID counter */
455 u32 last_call; /* ID of last call */
456 u8 last_type; /* Type of last packet */
461 } channels[RXRPC_MAXCALLS];
463 struct timer_list timer; /* Conn event timer */
464 struct work_struct processor; /* connection event processor */
465 struct work_struct destructor; /* In-process-context destroyer */
466 struct rxrpc_bundle *bundle; /* Client connection bundle */
467 struct rb_node service_node; /* Node in peer->service_conns */
468 struct list_head proc_link; /* link in procfs list */
469 struct list_head link; /* link in master connection list */
470 struct sk_buff_head rx_queue; /* received conn-level packets */
472 const struct rxrpc_security *security; /* applied security module */
475 struct crypto_sync_skcipher *cipher; /* encryption handle */
476 struct rxrpc_crypt csum_iv; /* packet checksum base */
477 u32 nonce; /* response re-use preventer */
481 unsigned long events;
482 unsigned long idle_timestamp; /* Time at which last became idle */
483 spinlock_t state_lock; /* state-change lock */
484 enum rxrpc_conn_proto_state state; /* current state of connection */
485 u32 abort_code; /* Abort code of connection abort */
486 int debug_id; /* debug ID for printks */
487 atomic_t serial; /* packet serial number counter */
488 unsigned int hi_serial; /* highest serial number received */
489 u32 service_id; /* Service ID, possibly upgraded */
490 u32 security_level; /* Security level selected */
491 u8 security_ix; /* security type */
492 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
493 u8 bundle_shift; /* Index into bundle->avail_chans */
494 bool exclusive; /* T if conn is exclusive */
495 bool upgrade; /* T if service ID can be upgraded */
496 u16 orig_service_id; /* Originally requested service ID */
497 short error; /* Local error code */
500 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
502 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
505 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
507 return !rxrpc_to_server(sp);
511 * Flags in call->flags.
513 enum rxrpc_call_flag {
514 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
515 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
516 RXRPC_CALL_IS_SERVICE, /* Call is service call */
517 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
518 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
519 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
520 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
521 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
522 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
523 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
524 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
525 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
526 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
527 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
528 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */
529 RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */
533 * Events that can be raised on a call.
535 enum rxrpc_call_event {
536 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
537 RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */
541 * The states that a call can be in.
543 enum rxrpc_call_state {
544 RXRPC_CALL_UNINITIALISED,
545 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
546 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
547 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
548 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
549 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
550 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
551 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
552 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
553 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
554 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
555 RXRPC_CALL_COMPLETE, /* - call complete */
556 NR__RXRPC_CALL_STATES
560 * Call completion condition (state == RXRPC_CALL_COMPLETE).
562 enum rxrpc_call_completion {
563 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
564 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
565 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
566 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
567 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
568 NR__RXRPC_CALL_COMPLETIONS
572 * Call Tx congestion management modes.
574 enum rxrpc_congest_mode {
575 RXRPC_CALL_SLOW_START,
576 RXRPC_CALL_CONGEST_AVOIDANCE,
577 RXRPC_CALL_PACKET_LOSS,
578 RXRPC_CALL_FAST_RETRANSMIT,
579 NR__RXRPC_CONGEST_MODES
583 * RxRPC call definition
584 * - matched by { connection, call_id }
588 struct rxrpc_connection *conn; /* connection carrying call */
589 struct rxrpc_peer *peer; /* Peer record for remote address */
590 struct rxrpc_local *local; /* Representation of local endpoint */
591 struct rxrpc_sock __rcu *socket; /* socket responsible */
592 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
593 struct key *key; /* Security details */
594 const struct rxrpc_security *security; /* applied security module */
595 struct mutex user_mutex; /* User access mutex */
596 struct sockaddr_rxrpc dest_srx; /* Destination address */
597 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
598 unsigned long ack_lost_at; /* When ACK is figured as lost */
599 unsigned long resend_at; /* When next resend needs to happen */
600 unsigned long ping_at; /* When next to send a ping */
601 unsigned long keepalive_at; /* When next to send a keepalive ping */
602 unsigned long expect_rx_by; /* When we expect to get a packet by */
603 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
604 unsigned long expect_term_by; /* When we expect call termination by */
605 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
606 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
607 struct timer_list timer; /* Combined event timer */
608 struct work_struct destroyer; /* In-process-context destroyer */
609 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
610 struct list_head link; /* link in master call list */
611 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
612 struct hlist_node error_link; /* link in error distribution list */
613 struct list_head accept_link; /* Link in rx->acceptq */
614 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
615 struct list_head sock_link; /* Link in rx->sock_calls */
616 struct rb_node sock_node; /* Node in rx->calls */
617 struct list_head attend_link; /* Link in local->call_attend_q */
618 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
619 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
620 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
621 unsigned long user_call_ID; /* user-defined call ID */
623 unsigned long events;
624 spinlock_t notify_lock; /* Kernel notification lock */
625 rwlock_t state_lock; /* lock for state transition */
626 u32 abort_code; /* Local/remote abort code */
627 int error; /* Local error incurred */
628 enum rxrpc_call_state state; /* current state of call */
629 enum rxrpc_call_completion completion; /* Call completion condition */
631 u8 security_ix; /* Security type */
632 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
633 u32 call_id; /* call ID on connection */
634 u32 cid; /* connection ID plus channel index */
635 u32 security_level; /* Security level selected */
636 int debug_id; /* debug ID for printks */
637 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
638 unsigned short rx_pkt_len; /* Current recvmsg packet len */
640 /* Transmitted data tracking. */
641 spinlock_t tx_lock; /* Transmit queue lock */
642 struct list_head tx_sendmsg; /* Sendmsg prepared packets */
643 struct list_head tx_buffer; /* Buffer of transmissible packets */
644 rxrpc_seq_t tx_bottom; /* First packet in buffer */
645 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
646 rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */
647 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
648 u16 tx_backoff; /* Delay to insert due to Tx failure */
649 u8 tx_winsize; /* Maximum size of Tx window */
650 #define RXRPC_TX_MAX_WINDOW 128
651 ktime_t tx_last_sent; /* Last time a transmission occurred */
653 /* Received data tracking */
654 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
655 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */
657 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */
658 rxrpc_seq_t rx_consumed; /* Highest packet consumed */
659 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
660 u8 rx_winsize; /* Size of Rx window */
662 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
663 * is fixed, we keep these numbers in terms of segments (ie. DATA
664 * packets) rather than bytes.
666 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
667 #define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4)
668 u8 cong_cwnd; /* Congestion window size */
669 u8 cong_extra; /* Extra to send for congestion management */
670 u8 cong_ssthresh; /* Slow-start threshold */
671 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
672 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
673 u8 cong_cumul_acks; /* Cumulative ACK count */
674 ktime_t cong_tstamp; /* Last time cwnd was changed */
676 /* Receive-phase ACK management (ACKs we send). */
677 u8 ackr_reason; /* reason to ACK */
678 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
679 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */
680 atomic_t ackr_nr_unacked; /* Number of unacked packets */
681 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
683 #define RXRPC_SACK_SIZE 256
684 /* SACK table for soft-acked packets */
685 u8 ackr_sack_table[RXRPC_SACK_SIZE];
689 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
690 ktime_t rtt_sent_at[4]; /* Time packet sent */
691 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
692 * Mask of pending samples in 8-11 */
693 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
694 #define RXRPC_CALL_RTT_PEND_SHIFT 8
696 /* Transmission-phase ACK management (ACKs we've received). */
697 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
698 rxrpc_seq_t acks_first_seq; /* first sequence number received */
699 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
700 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
701 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
702 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
706 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
708 struct rxrpc_ack_summary {
709 u16 nr_acks; /* Number of ACKs in packet */
710 u16 nr_new_acks; /* Number of new ACKs in packet */
711 u16 nr_rot_new_acks; /* Number of rotated new ACKs */
713 bool saw_nacks; /* Saw NACKs in packet */
714 bool new_low_nack; /* T if new low NACK found */
715 bool retrans_timeo; /* T if reTx due to timeout happened */
716 u8 flight_size; /* Number of unreceived transmissions */
717 /* Place to stash values for tracing */
718 enum rxrpc_congest_mode mode:8;
726 * sendmsg() cmsg-specified parameters.
729 RXRPC_CMD_SEND_DATA, /* send data message */
730 RXRPC_CMD_SEND_ABORT, /* request abort generation */
731 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
732 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
735 struct rxrpc_call_params {
736 s64 tx_total_len; /* Total Tx data length (if send data) */
737 unsigned long user_call_ID; /* User's call ID */
739 u32 hard; /* Maximum lifetime (sec) */
740 u32 idle; /* Max time since last data packet (msec) */
741 u32 normal; /* Max time since last call packet (msec) */
743 u8 nr_timeouts; /* Number of timeouts specified */
744 bool kernel; /* T if kernel is making the call */
745 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
748 struct rxrpc_send_params {
749 struct rxrpc_call_params call;
750 u32 abort_code; /* Abort code to Tx (if abort) */
751 enum rxrpc_command command : 8; /* The command to implement */
752 bool exclusive; /* Shared or exclusive call */
753 bool upgrade; /* If the connection is upgradeable */
757 * Buffer of data to be output as a packet.
761 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
762 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
763 ktime_t last_sent; /* Time at which last transmitted */
765 rxrpc_seq_t seq; /* Sequence number of this packet */
766 unsigned int call_debug_id;
767 unsigned int debug_id;
768 unsigned int len; /* Amount of data in buffer */
769 unsigned int space; /* Remaining data space */
770 unsigned int offset; /* Offset of fill point */
772 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
773 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
774 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
776 /* The packet for encrypting and DMA'ing. We align it such
777 * that data[] aligns correctly for any crypto blocksize.
779 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
780 struct rxrpc_wire_header wire; /* Network-ready header */
782 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
784 struct rxrpc_ackpacket ack;
791 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
793 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
796 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
798 return !rxrpc_sending_to_server(txb);
801 #include <trace/events/rxrpc.h>
806 extern atomic_t rxrpc_n_rx_skbs;
807 extern struct workqueue_struct *rxrpc_workqueue;
812 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
813 void rxrpc_discard_prealloc(struct rxrpc_sock *);
814 bool rxrpc_new_incoming_call(struct rxrpc_local *, struct rxrpc_peer *,
815 struct rxrpc_connection *, struct sockaddr_rxrpc *,
817 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
818 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
823 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
824 enum rxrpc_propose_ack_trace why);
825 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
826 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
827 enum rxrpc_propose_ack_trace);
828 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
829 void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb);
831 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
832 unsigned long expire_at,
834 enum rxrpc_timer_trace why);
836 void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb);
841 extern const char *const rxrpc_call_states[];
842 extern const char *const rxrpc_call_completions[];
843 extern struct kmem_cache *rxrpc_call_jar;
845 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what);
846 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
847 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
848 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
849 struct rxrpc_conn_parameters *,
850 struct sockaddr_rxrpc *,
851 struct rxrpc_call_params *, gfp_t,
853 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
855 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
856 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
857 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
858 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
859 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
860 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
861 void rxrpc_cleanup_call(struct rxrpc_call *);
862 void rxrpc_destroy_all_calls(struct rxrpc_net *);
864 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
866 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
869 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
871 return !rxrpc_is_service_call(call);
877 extern unsigned int rxrpc_reap_client_connections;
878 extern unsigned long rxrpc_conn_idle_client_expiry;
879 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
880 extern struct idr rxrpc_client_conn_ids;
882 void rxrpc_destroy_client_conn_ids(void);
883 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
884 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
885 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
886 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
888 void rxrpc_expose_client_call(struct rxrpc_call *);
889 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
890 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
891 void rxrpc_discard_expired_client_conns(struct work_struct *);
892 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
893 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
898 void rxrpc_process_connection(struct work_struct *);
899 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
900 int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb);
905 extern unsigned int rxrpc_connection_expiry;
906 extern unsigned int rxrpc_closed_conn_expiry;
908 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
909 struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *,
910 struct sockaddr_rxrpc *,
912 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
913 void rxrpc_disconnect_call(struct rxrpc_call *);
914 void rxrpc_kill_client_conn(struct rxrpc_connection *);
915 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
916 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
917 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
918 enum rxrpc_conn_trace);
919 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
920 enum rxrpc_conn_trace);
921 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
922 void rxrpc_service_connection_reaper(struct work_struct *);
923 void rxrpc_destroy_all_connections(struct rxrpc_net *);
925 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
927 return conn->out_clientflag;
930 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
932 return !rxrpc_conn_is_client(conn);
935 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
936 unsigned long expire_at)
938 timer_reduce(&conn->timer, expire_at);
944 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
946 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
947 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
948 const struct rxrpc_security *, struct sk_buff *);
949 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
954 void rxrpc_congestion_degrade(struct rxrpc_call *);
955 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
956 void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *);
961 int rxrpc_encap_rcv(struct sock *, struct sk_buff *);
962 void rxrpc_error_report(struct sock *);
963 int rxrpc_io_thread(void *data);
964 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local)
966 wake_up_process(local->io_thread);
972 extern const struct rxrpc_security rxrpc_no_security;
977 extern struct key_type key_type_rxrpc;
979 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
980 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
986 void rxrpc_send_version_request(struct rxrpc_local *local,
987 struct rxrpc_host_header *hdr,
988 struct sk_buff *skb);
993 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
994 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
995 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
996 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
997 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
998 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
999 void rxrpc_destroy_local(struct rxrpc_local *local);
1000 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1002 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1003 enum rxrpc_local_trace why)
1007 r = refcount_read(&local->ref);
1008 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1009 trace_rxrpc_local(local->debug_id, why, r, u);
1013 static inline void rxrpc_see_local(struct rxrpc_local *local,
1014 enum rxrpc_local_trace why)
1018 r = refcount_read(&local->ref);
1019 u = atomic_read(&local->active_users);
1020 trace_rxrpc_local(local->debug_id, why, r, u);
1026 extern unsigned int rxrpc_max_backlog __read_mostly;
1027 extern unsigned long rxrpc_soft_ack_delay;
1028 extern unsigned long rxrpc_idle_ack_delay;
1029 extern unsigned int rxrpc_rx_window_size;
1030 extern unsigned int rxrpc_rx_mtu;
1031 extern unsigned int rxrpc_rx_jumbo_max;
1036 extern unsigned int rxrpc_net_id;
1037 extern struct pernet_operations rxrpc_net_ops;
1039 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1041 return net_generic(net, rxrpc_net_id);
1047 int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1048 int rxrpc_send_abort_packet(struct rxrpc_call *);
1049 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1050 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb);
1051 void rxrpc_send_keepalive(struct rxrpc_peer *);
1052 void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1057 void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *);
1058 void rxrpc_peer_keepalive_worker(struct work_struct *);
1063 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1064 const struct sockaddr_rxrpc *);
1065 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1066 struct sockaddr_rxrpc *, gfp_t);
1067 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
1068 enum rxrpc_peer_trace);
1069 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1070 struct rxrpc_peer *);
1071 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1072 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1073 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1074 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1075 void rxrpc_put_peer_locked(struct rxrpc_peer *, enum rxrpc_peer_trace);
1080 extern const struct seq_operations rxrpc_call_seq_ops;
1081 extern const struct seq_operations rxrpc_connection_seq_ops;
1082 extern const struct seq_operations rxrpc_peer_seq_ops;
1083 extern const struct seq_operations rxrpc_local_seq_ops;
1088 void rxrpc_notify_socket(struct rxrpc_call *);
1089 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1090 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1091 bool __rxrpc_call_completed(struct rxrpc_call *);
1092 bool rxrpc_call_completed(struct rxrpc_call *);
1093 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1094 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1095 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1098 * Abort a call due to a protocol error.
1100 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1101 struct sk_buff *skb,
1102 const char *eproto_why,
1106 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1108 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1109 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1112 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1113 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1114 (abort_why), (abort_code))
1119 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1120 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1121 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1122 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1128 extern const struct rxrpc_security rxkad;
1134 int __init rxrpc_init_security(void);
1135 const struct rxrpc_security *rxrpc_security_lookup(u8);
1136 void rxrpc_exit_security(void);
1137 int rxrpc_init_client_call_security(struct rxrpc_call *);
1138 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1139 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1141 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1142 struct sk_buff *, u32, u32);
1147 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1152 extern struct key_type key_type_rxrpc_s;
1154 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1159 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1160 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1161 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1162 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1163 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1164 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1165 void rxrpc_purge_queue(struct sk_buff_head *);
1170 int rxrpc_stats_show(struct seq_file *seq, void *v);
1171 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1173 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1174 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1179 #ifdef CONFIG_SYSCTL
1180 extern int __init rxrpc_sysctl_init(void);
1181 extern void rxrpc_sysctl_exit(void);
1183 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1184 static inline void rxrpc_sysctl_exit(void) {}
1190 extern atomic_t rxrpc_nr_txbuf;
1191 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1193 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1194 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1195 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1200 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1202 static inline bool before(u32 seq1, u32 seq2)
1204 return (s32)(seq1 - seq2) < 0;
1206 static inline bool before_eq(u32 seq1, u32 seq2)
1208 return (s32)(seq1 - seq2) <= 0;
1210 static inline bool after(u32 seq1, u32 seq2)
1212 return (s32)(seq1 - seq2) > 0;
1214 static inline bool after_eq(u32 seq1, u32 seq2)
1216 return (s32)(seq1 - seq2) >= 0;
1222 extern unsigned int rxrpc_debug;
1224 #define dbgprintk(FMT,...) \
1225 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1227 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1228 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1229 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1232 #if defined(__KDEBUG)
1233 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1234 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1235 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1237 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1238 #define RXRPC_DEBUG_KENTER 0x01
1239 #define RXRPC_DEBUG_KLEAVE 0x02
1240 #define RXRPC_DEBUG_KDEBUG 0x04
1242 #define _enter(FMT,...) \
1244 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1245 kenter(FMT,##__VA_ARGS__); \
1248 #define _leave(FMT,...) \
1250 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1251 kleave(FMT,##__VA_ARGS__); \
1254 #define _debug(FMT,...) \
1256 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1257 kdebug(FMT,##__VA_ARGS__); \
1261 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1262 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1263 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1267 * debug assertion checking
1269 #if 1 // defined(__KDEBUGALL)
1273 if (unlikely(!(X))) { \
1274 pr_err("Assertion failed\n"); \
1279 #define ASSERTCMP(X, OP, Y) \
1281 __typeof__(X) _x = (X); \
1282 __typeof__(Y) _y = (__typeof__(X))(Y); \
1283 if (unlikely(!(_x OP _y))) { \
1284 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1285 (unsigned long)_x, (unsigned long)_x, #OP, \
1286 (unsigned long)_y, (unsigned long)_y); \
1291 #define ASSERTIF(C, X) \
1293 if (unlikely((C) && !(X))) { \
1294 pr_err("Assertion failed\n"); \
1299 #define ASSERTIFCMP(C, X, OP, Y) \
1301 __typeof__(X) _x = (X); \
1302 __typeof__(Y) _y = (__typeof__(X))(Y); \
1303 if (unlikely((C) && !(_x OP _y))) { \
1304 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1305 (unsigned long)_x, (unsigned long)_x, #OP, \
1306 (unsigned long)_y, (unsigned long)_y); \
1317 #define ASSERTCMP(X, OP, Y) \
1321 #define ASSERTIF(C, X) \
1325 #define ASSERTIFCMP(C, X, OP, Y) \
1329 #endif /* __KDEBUGALL */