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 struct rxrpc_connection *conn; /* Connection referred to (poke packet) */
206 u16 offset; /* Offset of data */
207 u16 len; /* Length of data */
209 #define RXRPC_RX_VERIFIED 0x01
211 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
214 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
217 * RxRPC security module interface
219 struct rxrpc_security {
220 const char *name; /* name of this service */
221 u8 security_index; /* security type provided */
222 u32 no_key_abort; /* Abort code indicating no key */
224 /* Initialise a security service */
227 /* Clean up a security service */
230 /* Parse the information from a server key */
231 int (*preparse_server_key)(struct key_preparsed_payload *);
233 /* Clean up the preparse buffer after parsing a server key */
234 void (*free_preparse_server_key)(struct key_preparsed_payload *);
236 /* Destroy the payload of a server key */
237 void (*destroy_server_key)(struct key *);
239 /* Describe a server key */
240 void (*describe_server_key)(const struct key *, struct seq_file *);
242 /* initialise a connection's security */
243 int (*init_connection_security)(struct rxrpc_connection *,
244 struct rxrpc_key_token *);
246 /* Work out how much data we can store in a packet, given an estimate
247 * of the amount of data remaining.
249 int (*how_much_data)(struct rxrpc_call *, size_t,
250 size_t *, size_t *, size_t *);
252 /* impose security on a packet */
253 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
255 /* verify the security on a received packet */
256 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
258 /* Free crypto request on a call */
259 void (*free_call_crypto)(struct rxrpc_call *);
261 /* issue a challenge */
262 int (*issue_challenge)(struct rxrpc_connection *);
264 /* respond to a challenge */
265 int (*respond_to_challenge)(struct rxrpc_connection *,
268 /* verify a response */
269 int (*verify_response)(struct rxrpc_connection *,
272 /* clear connection security */
273 void (*clear)(struct rxrpc_connection *);
277 * RxRPC local transport endpoint description
278 * - owned by a single AF_RXRPC socket
279 * - pointed to by transport socket struct sk_user_data
283 atomic_t active_users; /* Number of users of the local endpoint */
284 refcount_t ref; /* Number of references to the structure */
285 struct net *net; /* The network namespace */
286 struct rxrpc_net *rxnet; /* Our bits in the network namespace */
287 struct hlist_node link;
288 struct socket *socket; /* my UDP socket */
289 struct task_struct *io_thread;
290 struct completion io_thread_ready; /* Indication that the I/O thread started */
291 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
292 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
293 struct sk_buff_head rx_queue; /* Received packets */
294 struct list_head conn_attend_q; /* Conns requiring immediate attention */
295 struct list_head call_attend_q; /* Calls requiring immediate attention */
296 struct rb_root client_bundles; /* Client connection bundles by socket params */
297 spinlock_t client_bundles_lock; /* Lock for client_bundles */
298 spinlock_t lock; /* access lock */
299 rwlock_t services_lock; /* lock for services list */
300 int debug_id; /* debug ID for printks */
302 bool service_closed; /* Service socket closed */
303 struct sockaddr_rxrpc srx; /* local address */
307 * RxRPC remote transport endpoint definition
308 * - matched by local endpoint, remote port, address and protocol type
311 struct rcu_head rcu; /* This must be first */
313 unsigned long hash_key;
314 struct hlist_node hash_link;
315 struct rxrpc_local *local;
316 struct hlist_head error_targets; /* targets for net error distribution */
317 struct rb_root service_conns; /* Service connections */
318 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
319 time64_t last_tx_at; /* Last time packet sent here */
320 seqlock_t service_conn_lock;
321 spinlock_t lock; /* access lock */
322 unsigned int if_mtu; /* interface MTU for this peer */
323 unsigned int mtu; /* network MTU for this peer */
324 unsigned int maxdata; /* data size (MTU - hdrsize) */
325 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
326 int debug_id; /* debug ID for printks */
327 struct sockaddr_rxrpc srx; /* remote address */
329 /* calculated RTT cache */
330 #define RXRPC_RTT_CACHE_SIZE 32
331 spinlock_t rtt_input_lock; /* RTT lock for input routine */
332 ktime_t rtt_last_req; /* Time of last RTT request */
333 unsigned int rtt_count; /* Number of samples we've got */
335 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
336 u32 mdev_us; /* medium deviation */
337 u32 mdev_max_us; /* maximal mdev for the last rtt period */
338 u32 rttvar_us; /* smoothed mdev_max */
339 u32 rto_j; /* Retransmission timeout in jiffies */
340 u8 backoff; /* Backoff timeout */
342 u8 cong_ssthresh; /* Congestion slow-start threshold */
346 * Keys for matching a connection.
348 struct rxrpc_conn_proto {
351 u32 epoch; /* epoch of this connection */
352 u32 cid; /* connection ID */
358 struct rxrpc_conn_parameters {
359 struct rxrpc_local *local; /* Representation of local endpoint */
360 struct rxrpc_peer *peer; /* Remote endpoint */
361 struct key *key; /* Security details */
362 bool exclusive; /* T if conn is exclusive */
363 bool upgrade; /* T if service ID can be upgraded */
364 u16 service_id; /* Service ID for this connection */
365 u32 security_level; /* Security level selected */
369 * Call completion condition (state == RXRPC_CALL_COMPLETE).
371 enum rxrpc_call_completion {
372 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
373 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
374 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
375 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
376 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
377 NR__RXRPC_CALL_COMPLETIONS
381 * Bits in the connection flags.
383 enum rxrpc_conn_flag {
384 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
385 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
386 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
387 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
388 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
389 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
390 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
391 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
394 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
395 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
396 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
397 (1UL << RXRPC_CONN_FINAL_ACK_3))
400 * Events that can be raised upon a connection.
402 enum rxrpc_conn_event {
403 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
404 RXRPC_CONN_EV_ABORT_CALLS, /* Abort attached calls */
408 * The connection protocol state.
410 enum rxrpc_conn_proto_state {
411 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
412 RXRPC_CONN_CLIENT, /* Client connection */
413 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
414 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
415 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
416 RXRPC_CONN_SERVICE, /* Service secured connection */
417 RXRPC_CONN_ABORTED, /* Conn aborted */
418 RXRPC_CONN__NR_STATES
422 * RxRPC client connection bundle.
424 struct rxrpc_bundle {
425 struct rxrpc_local *local; /* Representation of local endpoint */
426 struct rxrpc_peer *peer; /* Remote endpoint */
427 struct key *key; /* Security details */
429 atomic_t active; /* Number of active users */
430 unsigned int debug_id;
431 u32 security_level; /* Security level selected */
432 u16 service_id; /* Service ID for this connection */
433 bool try_upgrade; /* True if the bundle is attempting upgrade */
434 bool alloc_conn; /* True if someone's getting a conn */
435 bool exclusive; /* T if conn is exclusive */
436 bool upgrade; /* T if service ID can be upgraded */
437 short alloc_error; /* Error from last conn allocation */
438 spinlock_t channel_lock;
439 struct rb_node local_node; /* Node in local->client_conns */
440 struct list_head waiting_calls; /* Calls waiting for channels */
441 unsigned long avail_chans; /* Mask of available channels */
442 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
446 * RxRPC connection definition
447 * - matched by { local, peer, epoch, conn_id, direction }
448 * - each connection can only handle four simultaneous calls
450 struct rxrpc_connection {
451 struct rxrpc_conn_proto proto;
452 struct rxrpc_local *local; /* Representation of local endpoint */
453 struct rxrpc_peer *peer; /* Remote endpoint */
454 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
455 struct key *key; /* Security details */
456 struct list_head attend_link; /* Link in local->conn_attend_q */
459 atomic_t active; /* Active count for service conns */
461 struct list_head cache_link;
463 unsigned char act_chans; /* Mask of active channels */
464 struct rxrpc_channel {
465 unsigned long final_ack_at; /* Time at which to issue final ACK */
466 struct rxrpc_call __rcu *call; /* Active call */
467 unsigned int call_debug_id; /* call->debug_id */
468 u32 call_id; /* ID of current call */
469 u32 call_counter; /* Call ID counter */
470 u32 last_call; /* ID of last call */
471 u8 last_type; /* Type of last packet */
476 } channels[RXRPC_MAXCALLS];
478 struct timer_list timer; /* Conn event timer */
479 struct work_struct processor; /* connection event processor */
480 struct work_struct destructor; /* In-process-context destroyer */
481 struct rxrpc_bundle *bundle; /* Client connection bundle */
482 struct rb_node service_node; /* Node in peer->service_conns */
483 struct list_head proc_link; /* link in procfs list */
484 struct list_head link; /* link in master connection list */
485 struct sk_buff_head rx_queue; /* received conn-level packets */
487 const struct rxrpc_security *security; /* applied security module */
490 struct crypto_sync_skcipher *cipher; /* encryption handle */
491 struct rxrpc_crypt csum_iv; /* packet checksum base */
492 u32 nonce; /* response re-use preventer */
496 unsigned long events;
497 unsigned long idle_timestamp; /* Time at which last became idle */
498 spinlock_t state_lock; /* state-change lock */
499 enum rxrpc_conn_proto_state state; /* current state of connection */
500 enum rxrpc_call_completion completion; /* Completion condition */
501 s32 abort_code; /* Abort code of connection abort */
502 int debug_id; /* debug ID for printks */
503 atomic_t serial; /* packet serial number counter */
504 unsigned int hi_serial; /* highest serial number received */
505 u32 service_id; /* Service ID, possibly upgraded */
506 u32 security_level; /* Security level selected */
507 u8 security_ix; /* security type */
508 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
509 u8 bundle_shift; /* Index into bundle->avail_chans */
510 bool exclusive; /* T if conn is exclusive */
511 bool upgrade; /* T if service ID can be upgraded */
512 u16 orig_service_id; /* Originally requested service ID */
513 short error; /* Local error code */
516 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
518 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
521 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
523 return !rxrpc_to_server(sp);
527 * Flags in call->flags.
529 enum rxrpc_call_flag {
530 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
531 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
532 RXRPC_CALL_IS_SERVICE, /* Call is service call */
533 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
534 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
535 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
536 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
537 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
538 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
539 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
540 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
541 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
542 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
543 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
544 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */
545 RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */
549 * Events that can be raised on a call.
551 enum rxrpc_call_event {
552 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
553 RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */
557 * The states that a call can be in.
559 enum rxrpc_call_state {
560 RXRPC_CALL_UNINITIALISED,
561 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
562 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
563 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
564 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
565 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
566 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
567 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
568 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
569 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
570 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
571 RXRPC_CALL_COMPLETE, /* - call complete */
572 NR__RXRPC_CALL_STATES
576 * Call Tx congestion management modes.
578 enum rxrpc_congest_mode {
579 RXRPC_CALL_SLOW_START,
580 RXRPC_CALL_CONGEST_AVOIDANCE,
581 RXRPC_CALL_PACKET_LOSS,
582 RXRPC_CALL_FAST_RETRANSMIT,
583 NR__RXRPC_CONGEST_MODES
587 * RxRPC call definition
588 * - matched by { connection, call_id }
592 struct rxrpc_connection *conn; /* connection carrying call */
593 struct rxrpc_peer *peer; /* Peer record for remote address */
594 struct rxrpc_local *local; /* Representation of local endpoint */
595 struct rxrpc_sock __rcu *socket; /* socket responsible */
596 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
597 struct key *key; /* Security details */
598 const struct rxrpc_security *security; /* applied security module */
599 struct mutex user_mutex; /* User access mutex */
600 struct sockaddr_rxrpc dest_srx; /* Destination address */
601 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
602 unsigned long ack_lost_at; /* When ACK is figured as lost */
603 unsigned long resend_at; /* When next resend needs to happen */
604 unsigned long ping_at; /* When next to send a ping */
605 unsigned long keepalive_at; /* When next to send a keepalive ping */
606 unsigned long expect_rx_by; /* When we expect to get a packet by */
607 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
608 unsigned long expect_term_by; /* When we expect call termination by */
609 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
610 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
611 struct timer_list timer; /* Combined event timer */
612 struct work_struct destroyer; /* In-process-context destroyer */
613 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
614 struct list_head link; /* link in master call list */
615 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
616 struct hlist_node error_link; /* link in error distribution list */
617 struct list_head accept_link; /* Link in rx->acceptq */
618 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
619 struct list_head sock_link; /* Link in rx->sock_calls */
620 struct rb_node sock_node; /* Node in rx->calls */
621 struct list_head attend_link; /* Link in local->call_attend_q */
622 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
623 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
624 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
625 unsigned long user_call_ID; /* user-defined call ID */
627 unsigned long events;
628 spinlock_t notify_lock; /* Kernel notification lock */
629 rwlock_t state_lock; /* lock for state transition */
630 const char *send_abort_why; /* String indicating why the abort was sent */
631 s32 send_abort; /* Abort code to be sent */
632 short send_abort_err; /* Error to be associated with the abort */
633 s32 abort_code; /* Local/remote abort code */
634 int error; /* Local error incurred */
635 enum rxrpc_call_state state; /* current state of call */
636 enum rxrpc_call_completion completion; /* Call completion condition */
638 u8 security_ix; /* Security type */
639 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
640 u32 call_id; /* call ID on connection */
641 u32 cid; /* connection ID plus channel index */
642 u32 security_level; /* Security level selected */
643 int debug_id; /* debug ID for printks */
644 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
645 unsigned short rx_pkt_len; /* Current recvmsg packet len */
647 /* Transmitted data tracking. */
648 spinlock_t tx_lock; /* Transmit queue lock */
649 struct list_head tx_sendmsg; /* Sendmsg prepared packets */
650 struct list_head tx_buffer; /* Buffer of transmissible packets */
651 rxrpc_seq_t tx_bottom; /* First packet in buffer */
652 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
653 rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */
654 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
655 u16 tx_backoff; /* Delay to insert due to Tx failure */
656 u8 tx_winsize; /* Maximum size of Tx window */
657 #define RXRPC_TX_MAX_WINDOW 128
658 ktime_t tx_last_sent; /* Last time a transmission occurred */
660 /* Received data tracking */
661 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
662 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */
664 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */
665 rxrpc_seq_t rx_consumed; /* Highest packet consumed */
666 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
667 u8 rx_winsize; /* Size of Rx window */
669 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
670 * is fixed, we keep these numbers in terms of segments (ie. DATA
671 * packets) rather than bytes.
673 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
674 #define RXRPC_MIN_CWND (RXRPC_TX_SMSS > 2190 ? 2 : RXRPC_TX_SMSS > 1095 ? 3 : 4)
675 u8 cong_cwnd; /* Congestion window size */
676 u8 cong_extra; /* Extra to send for congestion management */
677 u8 cong_ssthresh; /* Slow-start threshold */
678 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
679 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
680 u8 cong_cumul_acks; /* Cumulative ACK count */
681 ktime_t cong_tstamp; /* Last time cwnd was changed */
683 /* Receive-phase ACK management (ACKs we send). */
684 u8 ackr_reason; /* reason to ACK */
685 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
686 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */
687 atomic_t ackr_nr_unacked; /* Number of unacked packets */
688 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
690 #define RXRPC_SACK_SIZE 256
691 /* SACK table for soft-acked packets */
692 u8 ackr_sack_table[RXRPC_SACK_SIZE];
696 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
697 ktime_t rtt_sent_at[4]; /* Time packet sent */
698 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
699 * Mask of pending samples in 8-11 */
700 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
701 #define RXRPC_CALL_RTT_PEND_SHIFT 8
703 /* Transmission-phase ACK management (ACKs we've received). */
704 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
705 rxrpc_seq_t acks_first_seq; /* first sequence number received */
706 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
707 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
708 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
709 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
713 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
715 struct rxrpc_ack_summary {
716 u16 nr_acks; /* Number of ACKs in packet */
717 u16 nr_new_acks; /* Number of new ACKs in packet */
718 u16 nr_rot_new_acks; /* Number of rotated new ACKs */
720 bool saw_nacks; /* Saw NACKs in packet */
721 bool new_low_nack; /* T if new low NACK found */
722 bool retrans_timeo; /* T if reTx due to timeout happened */
723 u8 flight_size; /* Number of unreceived transmissions */
724 /* Place to stash values for tracing */
725 enum rxrpc_congest_mode mode:8;
733 * sendmsg() cmsg-specified parameters.
736 RXRPC_CMD_SEND_DATA, /* send data message */
737 RXRPC_CMD_SEND_ABORT, /* request abort generation */
738 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
739 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
742 struct rxrpc_call_params {
743 s64 tx_total_len; /* Total Tx data length (if send data) */
744 unsigned long user_call_ID; /* User's call ID */
746 u32 hard; /* Maximum lifetime (sec) */
747 u32 idle; /* Max time since last data packet (msec) */
748 u32 normal; /* Max time since last call packet (msec) */
750 u8 nr_timeouts; /* Number of timeouts specified */
751 bool kernel; /* T if kernel is making the call */
752 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
755 struct rxrpc_send_params {
756 struct rxrpc_call_params call;
757 u32 abort_code; /* Abort code to Tx (if abort) */
758 enum rxrpc_command command : 8; /* The command to implement */
759 bool exclusive; /* Shared or exclusive call */
760 bool upgrade; /* If the connection is upgradeable */
764 * Buffer of data to be output as a packet.
768 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
769 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
770 ktime_t last_sent; /* Time at which last transmitted */
772 rxrpc_seq_t seq; /* Sequence number of this packet */
773 unsigned int call_debug_id;
774 unsigned int debug_id;
775 unsigned int len; /* Amount of data in buffer */
776 unsigned int space; /* Remaining data space */
777 unsigned int offset; /* Offset of fill point */
779 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
780 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
781 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
783 /* The packet for encrypting and DMA'ing. We align it such
784 * that data[] aligns correctly for any crypto blocksize.
786 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
787 struct rxrpc_wire_header wire; /* Network-ready header */
789 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
791 struct rxrpc_ackpacket ack;
798 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
800 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
803 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
805 return !rxrpc_sending_to_server(txb);
808 #include <trace/events/rxrpc.h>
813 extern atomic_t rxrpc_n_rx_skbs;
814 extern struct workqueue_struct *rxrpc_workqueue;
819 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
820 void rxrpc_discard_prealloc(struct rxrpc_sock *);
821 int rxrpc_new_incoming_call(struct rxrpc_local *, struct rxrpc_peer *,
822 struct rxrpc_connection *, struct sockaddr_rxrpc *,
824 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
825 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
830 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
831 enum rxrpc_propose_ack_trace why);
832 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
833 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
834 enum rxrpc_propose_ack_trace);
835 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
836 void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb);
838 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
839 unsigned long expire_at,
841 enum rxrpc_timer_trace why);
843 void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb);
848 extern const char *const rxrpc_call_states[];
849 extern const char *const rxrpc_call_completions[];
850 extern struct kmem_cache *rxrpc_call_jar;
852 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what);
853 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
854 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
855 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
856 struct rxrpc_conn_parameters *,
857 struct sockaddr_rxrpc *,
858 struct rxrpc_call_params *, gfp_t,
860 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
862 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
863 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
864 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
865 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
866 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
867 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
868 void rxrpc_cleanup_call(struct rxrpc_call *);
869 void rxrpc_destroy_all_calls(struct rxrpc_net *);
871 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
873 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
876 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
878 return !rxrpc_is_service_call(call);
884 extern unsigned int rxrpc_reap_client_connections;
885 extern unsigned long rxrpc_conn_idle_client_expiry;
886 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
887 extern struct idr rxrpc_client_conn_ids;
889 void rxrpc_destroy_client_conn_ids(void);
890 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
891 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
892 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
893 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
895 void rxrpc_expose_client_call(struct rxrpc_call *);
896 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
897 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
898 void rxrpc_discard_expired_client_conns(struct work_struct *);
899 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
900 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
905 void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, struct sk_buff *skb,
906 unsigned int channel);
907 int rxrpc_abort_conn(struct rxrpc_connection *conn, struct sk_buff *skb,
908 s32 abort_code, int err, const char *why);
909 void rxrpc_process_connection(struct work_struct *);
910 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
911 int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb);
912 void rxrpc_input_conn_event(struct rxrpc_connection *conn, struct sk_buff *skb);
914 static inline bool rxrpc_is_conn_aborted(const struct rxrpc_connection *conn)
916 /* Order reading the abort info after the state check. */
917 return smp_load_acquire(&conn->state) == RXRPC_CONN_ABORTED;
923 extern unsigned int rxrpc_connection_expiry;
924 extern unsigned int rxrpc_closed_conn_expiry;
926 void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why);
927 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
928 struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *,
929 struct sockaddr_rxrpc *,
931 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
932 void rxrpc_disconnect_call(struct rxrpc_call *);
933 void rxrpc_kill_client_conn(struct rxrpc_connection *);
934 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
935 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
936 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
937 enum rxrpc_conn_trace);
938 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
939 enum rxrpc_conn_trace);
940 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
941 void rxrpc_service_connection_reaper(struct work_struct *);
942 void rxrpc_destroy_all_connections(struct rxrpc_net *);
944 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
946 return conn->out_clientflag;
949 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
951 return !rxrpc_conn_is_client(conn);
954 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
955 unsigned long expire_at)
957 timer_reduce(&conn->timer, expire_at);
963 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
965 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
966 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
967 const struct rxrpc_security *, struct sk_buff *);
968 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
973 void rxrpc_congestion_degrade(struct rxrpc_call *);
974 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
975 void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *);
980 int rxrpc_encap_rcv(struct sock *, struct sk_buff *);
981 void rxrpc_error_report(struct sock *);
982 int rxrpc_io_thread(void *data);
983 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local)
985 wake_up_process(local->io_thread);
991 extern const struct rxrpc_security rxrpc_no_security;
996 extern struct key_type key_type_rxrpc;
998 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
999 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
1005 void rxrpc_send_version_request(struct rxrpc_local *local,
1006 struct rxrpc_host_header *hdr,
1007 struct sk_buff *skb);
1012 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1013 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
1014 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
1015 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
1016 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
1017 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
1018 void rxrpc_destroy_local(struct rxrpc_local *local);
1019 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1021 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1022 enum rxrpc_local_trace why)
1026 r = refcount_read(&local->ref);
1027 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1028 trace_rxrpc_local(local->debug_id, why, r, u);
1032 static inline void rxrpc_see_local(struct rxrpc_local *local,
1033 enum rxrpc_local_trace why)
1037 r = refcount_read(&local->ref);
1038 u = atomic_read(&local->active_users);
1039 trace_rxrpc_local(local->debug_id, why, r, u);
1045 extern unsigned int rxrpc_max_backlog __read_mostly;
1046 extern unsigned long rxrpc_soft_ack_delay;
1047 extern unsigned long rxrpc_idle_ack_delay;
1048 extern unsigned int rxrpc_rx_window_size;
1049 extern unsigned int rxrpc_rx_mtu;
1050 extern unsigned int rxrpc_rx_jumbo_max;
1055 extern unsigned int rxrpc_net_id;
1056 extern struct pernet_operations rxrpc_net_ops;
1058 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1060 return net_generic(net, rxrpc_net_id);
1066 int rxrpc_send_ack_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1067 int rxrpc_send_abort_packet(struct rxrpc_call *);
1068 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1069 void rxrpc_send_conn_abort(struct rxrpc_connection *conn);
1070 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb);
1071 void rxrpc_send_keepalive(struct rxrpc_peer *);
1072 void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1077 void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *);
1078 void rxrpc_peer_keepalive_worker(struct work_struct *);
1083 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1084 const struct sockaddr_rxrpc *);
1085 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
1086 struct sockaddr_rxrpc *srx, gfp_t gfp);
1087 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
1088 enum rxrpc_peer_trace);
1089 void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer);
1090 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1091 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1092 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1093 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1098 extern const struct seq_operations rxrpc_call_seq_ops;
1099 extern const struct seq_operations rxrpc_connection_seq_ops;
1100 extern const struct seq_operations rxrpc_peer_seq_ops;
1101 extern const struct seq_operations rxrpc_local_seq_ops;
1106 void rxrpc_notify_socket(struct rxrpc_call *);
1107 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1108 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1109 bool __rxrpc_call_completed(struct rxrpc_call *);
1110 bool rxrpc_call_completed(struct rxrpc_call *);
1111 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1112 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1113 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1116 * Abort a call due to a protocol error.
1118 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1119 struct sk_buff *skb,
1120 const char *eproto_why,
1124 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1126 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1127 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1130 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1131 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1132 (abort_why), (abort_code))
1137 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1138 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1139 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1140 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1146 extern const struct rxrpc_security rxkad;
1152 int __init rxrpc_init_security(void);
1153 const struct rxrpc_security *rxrpc_security_lookup(u8);
1154 void rxrpc_exit_security(void);
1155 int rxrpc_init_client_call_security(struct rxrpc_call *);
1156 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1157 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1159 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1160 struct sk_buff *, u32, u32);
1165 bool rxrpc_propose_abort(struct rxrpc_call *call,
1166 u32 abort_code, int error, const char *why);
1167 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1172 extern struct key_type key_type_rxrpc_s;
1174 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1179 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1180 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1181 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1182 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1183 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1184 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1185 void rxrpc_purge_queue(struct sk_buff_head *);
1190 int rxrpc_stats_show(struct seq_file *seq, void *v);
1191 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1193 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1194 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1199 #ifdef CONFIG_SYSCTL
1200 extern int __init rxrpc_sysctl_init(void);
1201 extern void rxrpc_sysctl_exit(void);
1203 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1204 static inline void rxrpc_sysctl_exit(void) {}
1210 extern atomic_t rxrpc_nr_txbuf;
1211 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1213 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1214 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1215 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1220 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1222 static inline bool before(u32 seq1, u32 seq2)
1224 return (s32)(seq1 - seq2) < 0;
1226 static inline bool before_eq(u32 seq1, u32 seq2)
1228 return (s32)(seq1 - seq2) <= 0;
1230 static inline bool after(u32 seq1, u32 seq2)
1232 return (s32)(seq1 - seq2) > 0;
1234 static inline bool after_eq(u32 seq1, u32 seq2)
1236 return (s32)(seq1 - seq2) >= 0;
1242 extern unsigned int rxrpc_debug;
1244 #define dbgprintk(FMT,...) \
1245 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1247 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1248 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1249 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1252 #if defined(__KDEBUG)
1253 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1254 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1255 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1257 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1258 #define RXRPC_DEBUG_KENTER 0x01
1259 #define RXRPC_DEBUG_KLEAVE 0x02
1260 #define RXRPC_DEBUG_KDEBUG 0x04
1262 #define _enter(FMT,...) \
1264 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1265 kenter(FMT,##__VA_ARGS__); \
1268 #define _leave(FMT,...) \
1270 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1271 kleave(FMT,##__VA_ARGS__); \
1274 #define _debug(FMT,...) \
1276 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1277 kdebug(FMT,##__VA_ARGS__); \
1281 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1282 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1283 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1287 * debug assertion checking
1289 #if 1 // defined(__KDEBUGALL)
1293 if (unlikely(!(X))) { \
1294 pr_err("Assertion failed\n"); \
1299 #define ASSERTCMP(X, OP, Y) \
1301 __typeof__(X) _x = (X); \
1302 __typeof__(Y) _y = (__typeof__(X))(Y); \
1303 if (unlikely(!(_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); \
1311 #define ASSERTIF(C, X) \
1313 if (unlikely((C) && !(X))) { \
1314 pr_err("Assertion failed\n"); \
1319 #define ASSERTIFCMP(C, X, OP, Y) \
1321 __typeof__(X) _x = (X); \
1322 __typeof__(Y) _y = (__typeof__(X))(Y); \
1323 if (unlikely((C) && !(_x OP _y))) { \
1324 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1325 (unsigned long)_x, (unsigned long)_x, #OP, \
1326 (unsigned long)_y, (unsigned long)_y); \
1337 #define ASSERTCMP(X, OP, Y) \
1341 #define ASSERTIF(C, X) \
1345 #define ASSERTIFCMP(C, X, OP, Y) \
1349 #endif /* __KDEBUGALL */