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_REJECT_BUSY, /* Reject with BUSY */
40 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
44 * sk_state for RxRPC sockets
48 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
49 RXRPC_CLIENT_BOUND, /* client local address bound */
50 RXRPC_SERVER_BOUND, /* server local address bound */
51 RXRPC_SERVER_BOUND2, /* second server local address bound */
52 RXRPC_SERVER_LISTENING, /* server listening for connections */
53 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
54 RXRPC_CLOSE, /* socket is being closed */
58 * Per-network namespace data.
61 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
62 u32 epoch; /* Local epoch for detecting local-end reset */
63 struct list_head calls; /* List of calls active in this namespace */
64 spinlock_t call_lock; /* Lock for ->calls */
65 atomic_t nr_calls; /* Count of allocated calls */
68 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
69 struct list_head service_conns; /* Service conns in this namespace */
70 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
71 struct work_struct service_conn_reaper;
72 struct timer_list service_conn_reap_timer;
76 bool kill_all_client_conns;
77 atomic_t nr_client_conns;
78 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
79 struct mutex client_conn_discard_lock; /* Prevent multiple discarders */
80 struct list_head idle_client_conns;
81 struct work_struct client_conn_reaper;
82 struct timer_list client_conn_reap_timer;
84 struct hlist_head local_endpoints;
85 struct mutex local_mutex; /* Lock for ->local_endpoints */
87 DECLARE_HASHTABLE (peer_hash, 10);
88 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
90 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
91 u8 peer_keepalive_cursor;
92 time64_t peer_keepalive_base;
93 struct list_head peer_keepalive[32];
94 struct list_head peer_keepalive_new;
95 struct timer_list peer_keepalive_timer;
96 struct work_struct peer_keepalive_work;
98 atomic_t stat_tx_data;
99 atomic_t stat_tx_data_retrans;
100 atomic_t stat_tx_data_send;
101 atomic_t stat_tx_data_send_frag;
102 atomic_t stat_rx_data;
103 atomic_t stat_rx_data_reqack;
104 atomic_t stat_rx_data_jumbo;
106 atomic_t stat_tx_ack_fill;
107 atomic_t stat_tx_ack_send;
108 atomic_t stat_tx_ack_skip;
109 atomic_t stat_tx_acks[256];
110 atomic_t stat_rx_acks[256];
112 atomic_t stat_why_req_ack[8];
116 * Service backlog preallocation.
118 * This contains circular buffers of preallocated peers, connections and calls
119 * for incoming service calls and their head and tail pointers. This allows
120 * calls to be set up in the data_ready handler, thereby avoiding the need to
121 * shuffle packets around so much.
123 struct rxrpc_backlog {
124 unsigned short peer_backlog_head;
125 unsigned short peer_backlog_tail;
126 unsigned short conn_backlog_head;
127 unsigned short conn_backlog_tail;
128 unsigned short call_backlog_head;
129 unsigned short call_backlog_tail;
130 #define RXRPC_BACKLOG_MAX 32
131 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
132 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
133 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
137 * RxRPC socket definition
140 /* WARNING: sk has to be the first member */
142 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
143 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
144 struct rxrpc_local *local; /* local endpoint */
145 struct rxrpc_backlog *backlog; /* Preallocation for services */
146 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
147 struct list_head sock_calls; /* List of calls owned by this socket */
148 struct list_head to_be_accepted; /* calls awaiting acceptance */
149 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
150 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
151 struct key *key; /* security for this socket */
152 struct key *securities; /* list of server security descriptors */
153 struct rb_root calls; /* User ID -> call mapping */
155 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
156 rwlock_t call_lock; /* lock for calls */
157 u32 min_sec_level; /* minimum security level */
158 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
159 bool exclusive; /* Exclusive connection for a client socket */
160 u16 second_service; /* Additional service bound to the endpoint */
162 /* Service upgrade information */
163 u16 from; /* Service ID to upgrade (if not 0) */
164 u16 to; /* service ID to upgrade to */
166 sa_family_t family; /* Protocol family created with */
167 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
168 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
171 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
174 * CPU-byteorder normalised Rx packet header.
176 struct rxrpc_host_header {
177 u32 epoch; /* client boot timestamp */
178 u32 cid; /* connection and channel ID */
179 u32 callNumber; /* call ID (0 for connection-level packets) */
180 u32 seq; /* sequence number of pkt in call stream */
181 u32 serial; /* serial number of pkt sent to network */
182 u8 type; /* packet type */
183 u8 flags; /* packet flags */
184 u8 userStatus; /* app-layer defined status */
185 u8 securityIndex; /* security protocol ID */
187 u16 _rsvd; /* reserved */
188 u16 cksum; /* kerberos security checksum */
190 u16 serviceId; /* service ID */
194 * RxRPC socket buffer private variables
195 * - max 48 bytes (struct sk_buff::cb)
197 struct rxrpc_skb_priv {
198 u16 offset; /* Offset of data */
199 u16 len; /* Length of data */
201 #define RXRPC_RX_VERIFIED 0x01
203 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
206 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
209 * RxRPC security module interface
211 struct rxrpc_security {
212 const char *name; /* name of this service */
213 u8 security_index; /* security type provided */
214 u32 no_key_abort; /* Abort code indicating no key */
216 /* Initialise a security service */
219 /* Clean up a security service */
222 /* Parse the information from a server key */
223 int (*preparse_server_key)(struct key_preparsed_payload *);
225 /* Clean up the preparse buffer after parsing a server key */
226 void (*free_preparse_server_key)(struct key_preparsed_payload *);
228 /* Destroy the payload of a server key */
229 void (*destroy_server_key)(struct key *);
231 /* Describe a server key */
232 void (*describe_server_key)(const struct key *, struct seq_file *);
234 /* initialise a connection's security */
235 int (*init_connection_security)(struct rxrpc_connection *,
236 struct rxrpc_key_token *);
238 /* Work out how much data we can store in a packet, given an estimate
239 * of the amount of data remaining.
241 int (*how_much_data)(struct rxrpc_call *, size_t,
242 size_t *, size_t *, size_t *);
244 /* impose security on a packet */
245 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
247 /* verify the security on a received packet */
248 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
250 /* Free crypto request on a call */
251 void (*free_call_crypto)(struct rxrpc_call *);
253 /* issue a challenge */
254 int (*issue_challenge)(struct rxrpc_connection *);
256 /* respond to a challenge */
257 int (*respond_to_challenge)(struct rxrpc_connection *,
261 /* verify a response */
262 int (*verify_response)(struct rxrpc_connection *,
266 /* clear connection security */
267 void (*clear)(struct rxrpc_connection *);
271 * RxRPC local transport endpoint description
272 * - owned by a single AF_RXRPC socket
273 * - pointed to by transport socket struct sk_user_data
277 atomic_t active_users; /* Number of users of the local endpoint */
278 refcount_t ref; /* Number of references to the structure */
279 struct rxrpc_net *rxnet; /* The network ns in which this resides */
280 struct hlist_node link;
281 struct socket *socket; /* my UDP socket */
282 struct work_struct processor;
283 struct list_head ack_tx_queue; /* List of ACKs that need sending */
284 spinlock_t ack_tx_lock; /* ACK list lock */
285 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
286 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
287 struct sk_buff_head reject_queue; /* packets awaiting rejection */
288 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
289 struct rb_root client_bundles; /* Client connection bundles by socket params */
290 spinlock_t client_bundles_lock; /* Lock for client_bundles */
291 spinlock_t lock; /* access lock */
292 rwlock_t services_lock; /* lock for services list */
293 int debug_id; /* debug ID for printks */
295 bool service_closed; /* Service socket closed */
296 struct sockaddr_rxrpc srx; /* local address */
300 * RxRPC remote transport endpoint definition
301 * - matched by local endpoint, remote port, address and protocol type
304 struct rcu_head rcu; /* This must be first */
306 unsigned long hash_key;
307 struct hlist_node hash_link;
308 struct rxrpc_local *local;
309 struct hlist_head error_targets; /* targets for net error distribution */
310 struct rb_root service_conns; /* Service connections */
311 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
312 time64_t last_tx_at; /* Last time packet sent here */
313 seqlock_t service_conn_lock;
314 spinlock_t lock; /* access lock */
315 unsigned int if_mtu; /* interface MTU for this peer */
316 unsigned int mtu; /* network MTU for this peer */
317 unsigned int maxdata; /* data size (MTU - hdrsize) */
318 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
319 int debug_id; /* debug ID for printks */
320 struct sockaddr_rxrpc srx; /* remote address */
322 /* calculated RTT cache */
323 #define RXRPC_RTT_CACHE_SIZE 32
324 spinlock_t rtt_input_lock; /* RTT lock for input routine */
325 ktime_t rtt_last_req; /* Time of last RTT request */
326 unsigned int rtt_count; /* Number of samples we've got */
328 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
329 u32 mdev_us; /* medium deviation */
330 u32 mdev_max_us; /* maximal mdev for the last rtt period */
331 u32 rttvar_us; /* smoothed mdev_max */
332 u32 rto_j; /* Retransmission timeout in jiffies */
333 u8 backoff; /* Backoff timeout */
335 u8 cong_ssthresh; /* Congestion slow-start threshold */
339 * Keys for matching a connection.
341 struct rxrpc_conn_proto {
344 u32 epoch; /* epoch of this connection */
345 u32 cid; /* connection ID */
351 struct rxrpc_conn_parameters {
352 struct rxrpc_local *local; /* Representation of local endpoint */
353 struct rxrpc_peer *peer; /* Remote endpoint */
354 struct key *key; /* Security details */
355 bool exclusive; /* T if conn is exclusive */
356 bool upgrade; /* T if service ID can be upgraded */
357 u16 service_id; /* Service ID for this connection */
358 u32 security_level; /* Security level selected */
362 * Bits in the connection flags.
364 enum rxrpc_conn_flag {
365 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
366 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
367 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
368 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
369 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
370 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
371 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
372 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
375 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
376 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
377 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
378 (1UL << RXRPC_CONN_FINAL_ACK_3))
381 * Events that can be raised upon a connection.
383 enum rxrpc_conn_event {
384 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
388 * The connection protocol state.
390 enum rxrpc_conn_proto_state {
391 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
392 RXRPC_CONN_CLIENT, /* Client connection */
393 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
394 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
395 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
396 RXRPC_CONN_SERVICE, /* Service secured connection */
397 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
398 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
399 RXRPC_CONN__NR_STATES
403 * RxRPC client connection bundle.
405 struct rxrpc_bundle {
406 struct rxrpc_local *local; /* Representation of local endpoint */
407 struct rxrpc_peer *peer; /* Remote endpoint */
408 struct key *key; /* Security details */
410 atomic_t active; /* Number of active users */
411 unsigned int debug_id;
412 u32 security_level; /* Security level selected */
413 u16 service_id; /* Service ID for this connection */
414 bool try_upgrade; /* True if the bundle is attempting upgrade */
415 bool alloc_conn; /* True if someone's getting a conn */
416 bool exclusive; /* T if conn is exclusive */
417 bool upgrade; /* T if service ID can be upgraded */
418 short alloc_error; /* Error from last conn allocation */
419 spinlock_t channel_lock;
420 struct rb_node local_node; /* Node in local->client_conns */
421 struct list_head waiting_calls; /* Calls waiting for channels */
422 unsigned long avail_chans; /* Mask of available channels */
423 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
427 * RxRPC connection definition
428 * - matched by { local, peer, epoch, conn_id, direction }
429 * - each connection can only handle four simultaneous calls
431 struct rxrpc_connection {
432 struct rxrpc_conn_proto proto;
433 struct rxrpc_local *local; /* Representation of local endpoint */
434 struct rxrpc_peer *peer; /* Remote endpoint */
435 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
436 struct key *key; /* Security details */
439 atomic_t active; /* Active count for service conns */
441 struct list_head cache_link;
443 unsigned char act_chans; /* Mask of active channels */
444 struct rxrpc_channel {
445 unsigned long final_ack_at; /* Time at which to issue final ACK */
446 struct rxrpc_call __rcu *call; /* Active call */
447 unsigned int call_debug_id; /* call->debug_id */
448 u32 call_id; /* ID of current call */
449 u32 call_counter; /* Call ID counter */
450 u32 last_call; /* ID of last call */
451 u8 last_type; /* Type of last packet */
456 } channels[RXRPC_MAXCALLS];
458 struct timer_list timer; /* Conn event timer */
459 struct work_struct processor; /* connection event processor */
460 struct work_struct destructor; /* In-process-context destroyer */
461 struct rxrpc_bundle *bundle; /* Client connection bundle */
462 struct rb_node service_node; /* Node in peer->service_conns */
463 struct list_head proc_link; /* link in procfs list */
464 struct list_head link; /* link in master connection list */
465 struct sk_buff_head rx_queue; /* received conn-level packets */
467 const struct rxrpc_security *security; /* applied security module */
470 struct crypto_sync_skcipher *cipher; /* encryption handle */
471 struct rxrpc_crypt csum_iv; /* packet checksum base */
472 u32 nonce; /* response re-use preventer */
476 unsigned long events;
477 unsigned long idle_timestamp; /* Time at which last became idle */
478 spinlock_t state_lock; /* state-change lock */
479 enum rxrpc_conn_proto_state state; /* current state of connection */
480 u32 abort_code; /* Abort code of connection abort */
481 int debug_id; /* debug ID for printks */
482 atomic_t serial; /* packet serial number counter */
483 unsigned int hi_serial; /* highest serial number received */
484 u32 service_id; /* Service ID, possibly upgraded */
485 u32 security_level; /* Security level selected */
486 u8 security_ix; /* security type */
487 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
488 u8 bundle_shift; /* Index into bundle->avail_chans */
489 bool exclusive; /* T if conn is exclusive */
490 bool upgrade; /* T if service ID can be upgraded */
491 u16 orig_service_id; /* Originally requested service ID */
492 short error; /* Local error code */
495 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
497 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
500 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
502 return !rxrpc_to_server(sp);
506 * Flags in call->flags.
508 enum rxrpc_call_flag {
509 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
510 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
511 RXRPC_CALL_IS_SERVICE, /* Call is service call */
512 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
513 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
514 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
515 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
516 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
517 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
518 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
519 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
520 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
521 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
522 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
523 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
524 RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */
525 RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */
529 * Events that can be raised on a call.
531 enum rxrpc_call_event {
532 RXRPC_CALL_EV_ABORT, /* need to generate abort */
533 RXRPC_CALL_EV_RESEND, /* Tx resend required */
534 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
535 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
539 * The states that a call can be in.
541 enum rxrpc_call_state {
542 RXRPC_CALL_UNINITIALISED,
543 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
544 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
545 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
546 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
547 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
548 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
549 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
550 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
551 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
552 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
553 RXRPC_CALL_COMPLETE, /* - call complete */
554 NR__RXRPC_CALL_STATES
558 * Call completion condition (state == RXRPC_CALL_COMPLETE).
560 enum rxrpc_call_completion {
561 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
562 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
563 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
564 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
565 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
566 NR__RXRPC_CALL_COMPLETIONS
570 * Call Tx congestion management modes.
572 enum rxrpc_congest_mode {
573 RXRPC_CALL_SLOW_START,
574 RXRPC_CALL_CONGEST_AVOIDANCE,
575 RXRPC_CALL_PACKET_LOSS,
576 RXRPC_CALL_FAST_RETRANSMIT,
577 NR__RXRPC_CONGEST_MODES
581 * RxRPC call definition
582 * - matched by { connection, call_id }
586 struct rxrpc_connection *conn; /* connection carrying call */
587 struct rxrpc_peer *peer; /* Peer record for remote address */
588 struct rxrpc_sock __rcu *socket; /* socket responsible */
589 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
590 const struct rxrpc_security *security; /* applied security module */
591 struct mutex user_mutex; /* User access mutex */
592 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
593 unsigned long ack_lost_at; /* When ACK is figured as lost */
594 unsigned long resend_at; /* When next resend needs to happen */
595 unsigned long ping_at; /* When next to send a ping */
596 unsigned long keepalive_at; /* When next to send a keepalive ping */
597 unsigned long expect_rx_by; /* When we expect to get a packet by */
598 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
599 unsigned long expect_term_by; /* When we expect call termination by */
600 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
601 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
602 struct timer_list timer; /* Combined event timer */
603 struct work_struct processor; /* Event processor */
604 struct work_struct destroyer; /* In-process-context destroyer */
605 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
606 struct list_head link; /* link in master call list */
607 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
608 struct hlist_node error_link; /* link in error distribution list */
609 struct list_head accept_link; /* Link in rx->acceptq */
610 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
611 struct list_head sock_link; /* Link in rx->sock_calls */
612 struct rb_node sock_node; /* Node in rx->calls */
613 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
614 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
615 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
616 unsigned long user_call_ID; /* user-defined call ID */
618 unsigned long events;
619 spinlock_t notify_lock; /* Kernel notification lock */
620 rwlock_t state_lock; /* lock for state transition */
621 u32 abort_code; /* Local/remote abort code */
622 int error; /* Local error incurred */
623 enum rxrpc_call_state state; /* current state of call */
624 enum rxrpc_call_completion completion; /* Call completion condition */
626 u16 service_id; /* service ID */
627 u8 security_ix; /* Security type */
628 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
629 u32 call_id; /* call ID on connection */
630 u32 cid; /* connection ID plus channel index */
631 int debug_id; /* debug ID for printks */
632 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
633 unsigned short rx_pkt_len; /* Current recvmsg packet len */
635 /* Transmitted data tracking. */
636 spinlock_t tx_lock; /* Transmit queue lock */
637 struct list_head tx_buffer; /* Buffer of transmissible packets */
638 rxrpc_seq_t tx_bottom; /* First packet in buffer */
639 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
640 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
641 u16 tx_backoff; /* Delay to insert due to Tx failure */
642 u8 tx_winsize; /* Maximum size of Tx window */
643 #define RXRPC_TX_MAX_WINDOW 128
644 ktime_t tx_last_sent; /* Last time a transmission occurred */
646 /* Received data tracking */
647 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
648 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */
650 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */
651 rxrpc_seq_t rx_consumed; /* Highest packet consumed */
652 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
653 u8 rx_winsize; /* Size of Rx window */
654 spinlock_t input_lock; /* Lock for packet input to this call */
656 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
657 * is fixed, we keep these numbers in terms of segments (ie. DATA
658 * packets) rather than bytes.
660 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
661 u8 cong_cwnd; /* Congestion window size */
662 u8 cong_extra; /* Extra to send for congestion management */
663 u8 cong_ssthresh; /* Slow-start threshold */
664 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
665 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
666 u8 cong_cumul_acks; /* Cumulative ACK count */
667 ktime_t cong_tstamp; /* Last time cwnd was changed */
669 /* Receive-phase ACK management (ACKs we send). */
670 u8 ackr_reason; /* reason to ACK */
671 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
672 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */
673 atomic_t ackr_nr_unacked; /* Number of unacked packets */
674 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
676 #define RXRPC_SACK_SIZE 256
677 /* SACK table for soft-acked packets */
678 u8 ackr_sack_table[RXRPC_SACK_SIZE];
682 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
683 ktime_t rtt_sent_at[4]; /* Time packet sent */
684 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
685 * Mask of pending samples in 8-11 */
686 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
687 #define RXRPC_CALL_RTT_PEND_SHIFT 8
689 /* Transmission-phase ACK management (ACKs we've received). */
690 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
691 rxrpc_seq_t acks_first_seq; /* first sequence number received */
692 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
693 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
694 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
695 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
696 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
697 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
698 struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */
699 spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */
703 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
705 struct rxrpc_ack_summary {
706 u16 nr_acks; /* Number of ACKs in packet */
707 u16 nr_new_acks; /* Number of new ACKs in packet */
708 u16 nr_rot_new_acks; /* Number of rotated new ACKs */
710 bool saw_nacks; /* Saw NACKs in packet */
711 bool new_low_nack; /* T if new low NACK found */
712 bool retrans_timeo; /* T if reTx due to timeout happened */
713 u8 flight_size; /* Number of unreceived transmissions */
714 /* Place to stash values for tracing */
715 enum rxrpc_congest_mode mode:8;
723 * sendmsg() cmsg-specified parameters.
726 RXRPC_CMD_SEND_DATA, /* send data message */
727 RXRPC_CMD_SEND_ABORT, /* request abort generation */
728 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
729 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
732 struct rxrpc_call_params {
733 s64 tx_total_len; /* Total Tx data length (if send data) */
734 unsigned long user_call_ID; /* User's call ID */
736 u32 hard; /* Maximum lifetime (sec) */
737 u32 idle; /* Max time since last data packet (msec) */
738 u32 normal; /* Max time since last call packet (msec) */
740 u8 nr_timeouts; /* Number of timeouts specified */
741 bool kernel; /* T if kernel is making the call */
742 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
745 struct rxrpc_send_params {
746 struct rxrpc_call_params call;
747 u32 abort_code; /* Abort code to Tx (if abort) */
748 enum rxrpc_command command : 8; /* The command to implement */
749 bool exclusive; /* Shared or exclusive call */
750 bool upgrade; /* If the connection is upgradeable */
754 * Buffer of data to be output as a packet.
758 struct list_head call_link; /* Link in call->tx_queue */
759 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
760 struct rxrpc_call *call; /* Call to which belongs */
761 ktime_t last_sent; /* Time at which last transmitted */
763 rxrpc_seq_t seq; /* Sequence number of this packet */
764 unsigned int call_debug_id;
765 unsigned int debug_id;
766 unsigned int len; /* Amount of data in buffer */
767 unsigned int space; /* Remaining data space */
768 unsigned int offset; /* Offset of fill point */
770 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
771 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
772 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
774 /* The packet for encrypting and DMA'ing. We align it such
775 * that data[] aligns correctly for any crypto blocksize.
777 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
778 struct rxrpc_wire_header wire; /* Network-ready header */
780 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
782 struct rxrpc_ackpacket ack;
789 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
791 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
794 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
796 return !rxrpc_sending_to_server(txb);
799 #include <trace/events/rxrpc.h>
804 extern atomic_t rxrpc_n_rx_skbs;
805 extern struct workqueue_struct *rxrpc_workqueue;
810 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
811 void rxrpc_discard_prealloc(struct rxrpc_sock *);
812 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
815 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
816 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
821 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
822 enum rxrpc_propose_ack_trace why);
823 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
824 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
825 enum rxrpc_propose_ack_trace);
826 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
827 void rxrpc_process_call(struct work_struct *);
829 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
830 unsigned long expire_at,
832 enum rxrpc_timer_trace why);
837 extern const char *const rxrpc_call_states[];
838 extern const char *const rxrpc_call_completions[];
839 extern struct kmem_cache *rxrpc_call_jar;
841 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
842 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
843 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
844 struct rxrpc_conn_parameters *,
845 struct sockaddr_rxrpc *,
846 struct rxrpc_call_params *, gfp_t,
848 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
850 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
851 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
852 void rxrpc_queue_call(struct rxrpc_call *, enum rxrpc_call_trace);
853 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
854 bool rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
855 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
856 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
857 void rxrpc_cleanup_call(struct rxrpc_call *);
858 void rxrpc_destroy_all_calls(struct rxrpc_net *);
860 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
862 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
865 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
867 return !rxrpc_is_service_call(call);
873 extern unsigned int rxrpc_reap_client_connections;
874 extern unsigned long rxrpc_conn_idle_client_expiry;
875 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
876 extern struct idr rxrpc_client_conn_ids;
878 void rxrpc_destroy_client_conn_ids(void);
879 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
880 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
881 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
882 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
884 void rxrpc_expose_client_call(struct rxrpc_call *);
885 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
886 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
887 void rxrpc_discard_expired_client_conns(struct work_struct *);
888 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
889 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
894 void rxrpc_process_connection(struct work_struct *);
895 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
900 extern unsigned int rxrpc_connection_expiry;
901 extern unsigned int rxrpc_closed_conn_expiry;
903 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
904 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
906 struct rxrpc_peer **);
907 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
908 void rxrpc_disconnect_call(struct rxrpc_call *);
909 void rxrpc_kill_client_conn(struct rxrpc_connection *);
910 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
911 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
912 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
913 enum rxrpc_conn_trace);
914 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
915 enum rxrpc_conn_trace);
916 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
917 void rxrpc_service_connection_reaper(struct work_struct *);
918 void rxrpc_destroy_all_connections(struct rxrpc_net *);
920 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
922 return conn->out_clientflag;
925 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
927 return !rxrpc_conn_is_client(conn);
930 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
931 unsigned long expire_at)
933 timer_reduce(&conn->timer, expire_at);
939 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
941 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
942 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
943 const struct rxrpc_security *, struct sk_buff *);
944 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
949 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
950 void rxrpc_input_implicit_end_call(struct rxrpc_sock *, struct rxrpc_connection *,
951 struct rxrpc_call *);
956 int rxrpc_input_packet(struct sock *, struct sk_buff *);
961 extern const struct rxrpc_security rxrpc_no_security;
966 extern struct key_type key_type_rxrpc;
968 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
969 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
975 extern void rxrpc_process_local_events(struct rxrpc_local *);
980 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
981 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
982 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
983 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
984 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
985 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
986 void rxrpc_queue_local(struct rxrpc_local *);
987 void rxrpc_destroy_all_locals(struct rxrpc_net *);
989 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local,
990 enum rxrpc_local_trace why)
992 unsigned int debug_id = local->debug_id;
995 r = refcount_read(&local->ref);
996 u = atomic_dec_return(&local->active_users);
997 trace_rxrpc_local(debug_id, why, r, u);
1001 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1002 enum rxrpc_local_trace why)
1006 r = refcount_read(&local->ref);
1007 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1008 trace_rxrpc_local(local->debug_id, why, r, u);
1012 static inline void rxrpc_see_local(struct rxrpc_local *local,
1013 enum rxrpc_local_trace why)
1017 r = refcount_read(&local->ref);
1018 u = atomic_read(&local->active_users);
1019 trace_rxrpc_local(local->debug_id, why, r, u);
1025 extern unsigned int rxrpc_max_backlog __read_mostly;
1026 extern unsigned long rxrpc_soft_ack_delay;
1027 extern unsigned long rxrpc_idle_ack_delay;
1028 extern unsigned int rxrpc_rx_window_size;
1029 extern unsigned int rxrpc_rx_mtu;
1030 extern unsigned int rxrpc_rx_jumbo_max;
1035 extern unsigned int rxrpc_net_id;
1036 extern struct pernet_operations rxrpc_net_ops;
1038 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1040 return net_generic(net, rxrpc_net_id);
1046 void rxrpc_transmit_ack_packets(struct rxrpc_local *);
1047 int rxrpc_send_abort_packet(struct rxrpc_call *);
1048 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1049 void rxrpc_reject_packets(struct rxrpc_local *);
1050 void rxrpc_send_keepalive(struct rxrpc_peer *);
1055 void rxrpc_error_report(struct sock *);
1056 void rxrpc_peer_keepalive_worker(struct work_struct *);
1061 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1062 const struct sockaddr_rxrpc *);
1063 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1064 struct sockaddr_rxrpc *, gfp_t);
1065 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
1066 enum rxrpc_peer_trace);
1067 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1068 struct rxrpc_peer *);
1069 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1070 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1071 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1072 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1073 void rxrpc_put_peer_locked(struct rxrpc_peer *, enum rxrpc_peer_trace);
1078 extern const struct seq_operations rxrpc_call_seq_ops;
1079 extern const struct seq_operations rxrpc_connection_seq_ops;
1080 extern const struct seq_operations rxrpc_peer_seq_ops;
1081 extern const struct seq_operations rxrpc_local_seq_ops;
1086 void rxrpc_notify_socket(struct rxrpc_call *);
1087 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1088 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1089 bool __rxrpc_call_completed(struct rxrpc_call *);
1090 bool rxrpc_call_completed(struct rxrpc_call *);
1091 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1092 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1093 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1096 * Abort a call due to a protocol error.
1098 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1099 struct sk_buff *skb,
1100 const char *eproto_why,
1104 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1106 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1107 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1110 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1111 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1112 (abort_why), (abort_code))
1117 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1118 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1119 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1120 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1126 extern const struct rxrpc_security rxkad;
1132 int __init rxrpc_init_security(void);
1133 const struct rxrpc_security *rxrpc_security_lookup(u8);
1134 void rxrpc_exit_security(void);
1135 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1136 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1138 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1139 struct sk_buff *, u32, u32);
1144 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1149 extern struct key_type key_type_rxrpc_s;
1151 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1156 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1157 void rxrpc_packet_destructor(struct sk_buff *);
1158 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1159 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1160 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1161 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1162 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1163 void rxrpc_purge_queue(struct sk_buff_head *);
1168 int rxrpc_stats_show(struct seq_file *seq, void *v);
1169 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1171 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1172 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1177 #ifdef CONFIG_SYSCTL
1178 extern int __init rxrpc_sysctl_init(void);
1179 extern void rxrpc_sysctl_exit(void);
1181 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1182 static inline void rxrpc_sysctl_exit(void) {}
1188 extern atomic_t rxrpc_nr_txbuf;
1189 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1191 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1192 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1193 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1198 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1200 static inline bool before(u32 seq1, u32 seq2)
1202 return (s32)(seq1 - seq2) < 0;
1204 static inline bool before_eq(u32 seq1, u32 seq2)
1206 return (s32)(seq1 - seq2) <= 0;
1208 static inline bool after(u32 seq1, u32 seq2)
1210 return (s32)(seq1 - seq2) > 0;
1212 static inline bool after_eq(u32 seq1, u32 seq2)
1214 return (s32)(seq1 - seq2) >= 0;
1220 extern unsigned int rxrpc_debug;
1222 #define dbgprintk(FMT,...) \
1223 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1225 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1226 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1227 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1230 #if defined(__KDEBUG)
1231 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1232 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1233 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1235 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1236 #define RXRPC_DEBUG_KENTER 0x01
1237 #define RXRPC_DEBUG_KLEAVE 0x02
1238 #define RXRPC_DEBUG_KDEBUG 0x04
1240 #define _enter(FMT,...) \
1242 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1243 kenter(FMT,##__VA_ARGS__); \
1246 #define _leave(FMT,...) \
1248 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1249 kleave(FMT,##__VA_ARGS__); \
1252 #define _debug(FMT,...) \
1254 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1255 kdebug(FMT,##__VA_ARGS__); \
1259 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1260 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1261 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1265 * debug assertion checking
1267 #if 1 // defined(__KDEBUGALL)
1271 if (unlikely(!(X))) { \
1272 pr_err("Assertion failed\n"); \
1277 #define ASSERTCMP(X, OP, Y) \
1279 __typeof__(X) _x = (X); \
1280 __typeof__(Y) _y = (__typeof__(X))(Y); \
1281 if (unlikely(!(_x OP _y))) { \
1282 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1283 (unsigned long)_x, (unsigned long)_x, #OP, \
1284 (unsigned long)_y, (unsigned long)_y); \
1289 #define ASSERTIF(C, X) \
1291 if (unlikely((C) && !(X))) { \
1292 pr_err("Assertion failed\n"); \
1297 #define ASSERTIFCMP(C, X, OP, Y) \
1299 __typeof__(X) _x = (X); \
1300 __typeof__(Y) _y = (__typeof__(X))(Y); \
1301 if (unlikely((C) && !(_x OP _y))) { \
1302 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1303 (unsigned long)_x, (unsigned long)_x, #OP, \
1304 (unsigned long)_y, (unsigned long)_y); \
1315 #define ASSERTCMP(X, OP, Y) \
1319 #define ASSERTIF(C, X) \
1323 #define ASSERTIFCMP(C, X, OP, Y) \
1327 #endif /* __KDEBUGALL */