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_rx_data;
105 atomic_t stat_rx_data_reqack;
106 atomic_t stat_rx_data_jumbo;
108 atomic_t stat_tx_ack_fill;
109 atomic_t stat_tx_ack_send;
110 atomic_t stat_tx_ack_skip;
111 atomic_t stat_tx_acks[256];
112 atomic_t stat_rx_acks[256];
114 atomic_t stat_why_req_ack[8];
116 atomic_t stat_io_loop;
120 * Service backlog preallocation.
122 * This contains circular buffers of preallocated peers, connections and calls
123 * for incoming service calls and their head and tail pointers. This allows
124 * calls to be set up in the data_ready handler, thereby avoiding the need to
125 * shuffle packets around so much.
127 struct rxrpc_backlog {
128 unsigned short peer_backlog_head;
129 unsigned short peer_backlog_tail;
130 unsigned short conn_backlog_head;
131 unsigned short conn_backlog_tail;
132 unsigned short call_backlog_head;
133 unsigned short call_backlog_tail;
134 #define RXRPC_BACKLOG_MAX 32
135 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
136 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
137 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
141 * RxRPC socket definition
144 /* WARNING: sk has to be the first member */
146 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
147 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
148 struct rxrpc_local *local; /* local endpoint */
149 struct rxrpc_backlog *backlog; /* Preallocation for services */
150 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
151 struct list_head sock_calls; /* List of calls owned by this socket */
152 struct list_head to_be_accepted; /* calls awaiting acceptance */
153 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
154 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
155 struct key *key; /* security for this socket */
156 struct key *securities; /* list of server security descriptors */
157 struct rb_root calls; /* User ID -> call mapping */
159 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
160 rwlock_t call_lock; /* lock for calls */
161 u32 min_sec_level; /* minimum security level */
162 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
163 bool exclusive; /* Exclusive connection for a client socket */
164 u16 second_service; /* Additional service bound to the endpoint */
166 /* Service upgrade information */
167 u16 from; /* Service ID to upgrade (if not 0) */
168 u16 to; /* service ID to upgrade to */
170 sa_family_t family; /* Protocol family created with */
171 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
172 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
175 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
178 * CPU-byteorder normalised Rx packet header.
180 struct rxrpc_host_header {
181 u32 epoch; /* client boot timestamp */
182 u32 cid; /* connection and channel ID */
183 u32 callNumber; /* call ID (0 for connection-level packets) */
184 u32 seq; /* sequence number of pkt in call stream */
185 u32 serial; /* serial number of pkt sent to network */
186 u8 type; /* packet type */
187 u8 flags; /* packet flags */
188 u8 userStatus; /* app-layer defined status */
189 u8 securityIndex; /* security protocol ID */
191 u16 _rsvd; /* reserved */
192 u16 cksum; /* kerberos security checksum */
194 u16 serviceId; /* service ID */
198 * RxRPC socket buffer private variables
199 * - max 48 bytes (struct sk_buff::cb)
201 struct rxrpc_skb_priv {
202 u16 offset; /* Offset of data */
203 u16 len; /* Length of data */
205 #define RXRPC_RX_VERIFIED 0x01
207 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
210 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
213 * RxRPC security module interface
215 struct rxrpc_security {
216 const char *name; /* name of this service */
217 u8 security_index; /* security type provided */
218 u32 no_key_abort; /* Abort code indicating no key */
220 /* Initialise a security service */
223 /* Clean up a security service */
226 /* Parse the information from a server key */
227 int (*preparse_server_key)(struct key_preparsed_payload *);
229 /* Clean up the preparse buffer after parsing a server key */
230 void (*free_preparse_server_key)(struct key_preparsed_payload *);
232 /* Destroy the payload of a server key */
233 void (*destroy_server_key)(struct key *);
235 /* Describe a server key */
236 void (*describe_server_key)(const struct key *, struct seq_file *);
238 /* initialise a connection's security */
239 int (*init_connection_security)(struct rxrpc_connection *,
240 struct rxrpc_key_token *);
242 /* Work out how much data we can store in a packet, given an estimate
243 * of the amount of data remaining.
245 int (*how_much_data)(struct rxrpc_call *, size_t,
246 size_t *, size_t *, size_t *);
248 /* impose security on a packet */
249 int (*secure_packet)(struct rxrpc_call *, struct rxrpc_txbuf *);
251 /* verify the security on a received packet */
252 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *);
254 /* Free crypto request on a call */
255 void (*free_call_crypto)(struct rxrpc_call *);
257 /* issue a challenge */
258 int (*issue_challenge)(struct rxrpc_connection *);
260 /* respond to a challenge */
261 int (*respond_to_challenge)(struct rxrpc_connection *,
265 /* verify a response */
266 int (*verify_response)(struct rxrpc_connection *,
270 /* clear connection security */
271 void (*clear)(struct rxrpc_connection *);
275 * RxRPC local transport endpoint description
276 * - owned by a single AF_RXRPC socket
277 * - pointed to by transport socket struct sk_user_data
281 atomic_t active_users; /* Number of users of the local endpoint */
282 refcount_t ref; /* Number of references to the structure */
283 struct rxrpc_net *rxnet; /* The network ns in which this resides */
284 struct hlist_node link;
285 struct socket *socket; /* my UDP socket */
286 struct task_struct *io_thread;
287 struct list_head ack_tx_queue; /* List of ACKs that need sending */
288 spinlock_t ack_tx_lock; /* ACK list lock */
289 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
290 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
291 struct sk_buff_head rx_queue; /* Received packets */
292 struct list_head call_attend_q; /* Calls requiring immediate attention */
293 struct rb_root client_bundles; /* Client connection bundles by socket params */
294 spinlock_t client_bundles_lock; /* Lock for client_bundles */
295 spinlock_t lock; /* access lock */
296 rwlock_t services_lock; /* lock for services list */
297 int debug_id; /* debug ID for printks */
299 bool service_closed; /* Service socket closed */
300 struct sockaddr_rxrpc srx; /* local address */
304 * RxRPC remote transport endpoint definition
305 * - matched by local endpoint, remote port, address and protocol type
308 struct rcu_head rcu; /* This must be first */
310 unsigned long hash_key;
311 struct hlist_node hash_link;
312 struct rxrpc_local *local;
313 struct hlist_head error_targets; /* targets for net error distribution */
314 struct rb_root service_conns; /* Service connections */
315 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
316 time64_t last_tx_at; /* Last time packet sent here */
317 seqlock_t service_conn_lock;
318 spinlock_t lock; /* access lock */
319 unsigned int if_mtu; /* interface MTU for this peer */
320 unsigned int mtu; /* network MTU for this peer */
321 unsigned int maxdata; /* data size (MTU - hdrsize) */
322 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
323 int debug_id; /* debug ID for printks */
324 struct sockaddr_rxrpc srx; /* remote address */
326 /* calculated RTT cache */
327 #define RXRPC_RTT_CACHE_SIZE 32
328 spinlock_t rtt_input_lock; /* RTT lock for input routine */
329 ktime_t rtt_last_req; /* Time of last RTT request */
330 unsigned int rtt_count; /* Number of samples we've got */
332 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
333 u32 mdev_us; /* medium deviation */
334 u32 mdev_max_us; /* maximal mdev for the last rtt period */
335 u32 rttvar_us; /* smoothed mdev_max */
336 u32 rto_j; /* Retransmission timeout in jiffies */
337 u8 backoff; /* Backoff timeout */
339 u8 cong_ssthresh; /* Congestion slow-start threshold */
343 * Keys for matching a connection.
345 struct rxrpc_conn_proto {
348 u32 epoch; /* epoch of this connection */
349 u32 cid; /* connection ID */
355 struct rxrpc_conn_parameters {
356 struct rxrpc_local *local; /* Representation of local endpoint */
357 struct rxrpc_peer *peer; /* Remote endpoint */
358 struct key *key; /* Security details */
359 bool exclusive; /* T if conn is exclusive */
360 bool upgrade; /* T if service ID can be upgraded */
361 u16 service_id; /* Service ID for this connection */
362 u32 security_level; /* Security level selected */
366 * Bits in the connection flags.
368 enum rxrpc_conn_flag {
369 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
370 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
371 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
372 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
373 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
374 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
375 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
376 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
379 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
380 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
381 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
382 (1UL << RXRPC_CONN_FINAL_ACK_3))
385 * Events that can be raised upon a connection.
387 enum rxrpc_conn_event {
388 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
392 * The connection protocol state.
394 enum rxrpc_conn_proto_state {
395 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
396 RXRPC_CONN_CLIENT, /* Client connection */
397 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
398 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
399 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
400 RXRPC_CONN_SERVICE, /* Service secured connection */
401 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
402 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
403 RXRPC_CONN__NR_STATES
407 * RxRPC client connection bundle.
409 struct rxrpc_bundle {
410 struct rxrpc_local *local; /* Representation of local endpoint */
411 struct rxrpc_peer *peer; /* Remote endpoint */
412 struct key *key; /* Security details */
414 atomic_t active; /* Number of active users */
415 unsigned int debug_id;
416 u32 security_level; /* Security level selected */
417 u16 service_id; /* Service ID for this connection */
418 bool try_upgrade; /* True if the bundle is attempting upgrade */
419 bool alloc_conn; /* True if someone's getting a conn */
420 bool exclusive; /* T if conn is exclusive */
421 bool upgrade; /* T if service ID can be upgraded */
422 short alloc_error; /* Error from last conn allocation */
423 spinlock_t channel_lock;
424 struct rb_node local_node; /* Node in local->client_conns */
425 struct list_head waiting_calls; /* Calls waiting for channels */
426 unsigned long avail_chans; /* Mask of available channels */
427 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
431 * RxRPC connection definition
432 * - matched by { local, peer, epoch, conn_id, direction }
433 * - each connection can only handle four simultaneous calls
435 struct rxrpc_connection {
436 struct rxrpc_conn_proto proto;
437 struct rxrpc_local *local; /* Representation of local endpoint */
438 struct rxrpc_peer *peer; /* Remote endpoint */
439 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
440 struct key *key; /* Security details */
443 atomic_t active; /* Active count for service conns */
445 struct list_head cache_link;
447 unsigned char act_chans; /* Mask of active channels */
448 struct rxrpc_channel {
449 unsigned long final_ack_at; /* Time at which to issue final ACK */
450 struct rxrpc_call __rcu *call; /* Active call */
451 unsigned int call_debug_id; /* call->debug_id */
452 u32 call_id; /* ID of current call */
453 u32 call_counter; /* Call ID counter */
454 u32 last_call; /* ID of last call */
455 u8 last_type; /* Type of last packet */
460 } channels[RXRPC_MAXCALLS];
462 struct timer_list timer; /* Conn event timer */
463 struct work_struct processor; /* connection event processor */
464 struct work_struct destructor; /* In-process-context destroyer */
465 struct rxrpc_bundle *bundle; /* Client connection bundle */
466 struct rb_node service_node; /* Node in peer->service_conns */
467 struct list_head proc_link; /* link in procfs list */
468 struct list_head link; /* link in master connection list */
469 struct sk_buff_head rx_queue; /* received conn-level packets */
471 const struct rxrpc_security *security; /* applied security module */
474 struct crypto_sync_skcipher *cipher; /* encryption handle */
475 struct rxrpc_crypt csum_iv; /* packet checksum base */
476 u32 nonce; /* response re-use preventer */
480 unsigned long events;
481 unsigned long idle_timestamp; /* Time at which last became idle */
482 spinlock_t state_lock; /* state-change lock */
483 enum rxrpc_conn_proto_state state; /* current state of connection */
484 u32 abort_code; /* Abort code of connection abort */
485 int debug_id; /* debug ID for printks */
486 atomic_t serial; /* packet serial number counter */
487 unsigned int hi_serial; /* highest serial number received */
488 u32 service_id; /* Service ID, possibly upgraded */
489 u32 security_level; /* Security level selected */
490 u8 security_ix; /* security type */
491 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
492 u8 bundle_shift; /* Index into bundle->avail_chans */
493 bool exclusive; /* T if conn is exclusive */
494 bool upgrade; /* T if service ID can be upgraded */
495 u16 orig_service_id; /* Originally requested service ID */
496 short error; /* Local error code */
499 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
501 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
504 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
506 return !rxrpc_to_server(sp);
510 * Flags in call->flags.
512 enum rxrpc_call_flag {
513 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
514 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
515 RXRPC_CALL_IS_SERVICE, /* Call is service call */
516 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
517 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
518 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
519 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
520 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
521 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
522 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
523 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
524 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
525 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
526 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
527 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */
528 RXRPC_CALL_RX_IS_IDLE, /* Reception is idle - send an ACK */
532 * Events that can be raised on a call.
534 enum rxrpc_call_event {
535 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
536 RXRPC_CALL_EV_INITIAL_PING, /* Send initial ping for a new service call */
540 * The states that a call can be in.
542 enum rxrpc_call_state {
543 RXRPC_CALL_UNINITIALISED,
544 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
545 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
546 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
547 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
548 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
549 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
550 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
551 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
552 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
553 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
554 RXRPC_CALL_COMPLETE, /* - call complete */
555 NR__RXRPC_CALL_STATES
559 * Call completion condition (state == RXRPC_CALL_COMPLETE).
561 enum rxrpc_call_completion {
562 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
563 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
564 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
565 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
566 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
567 NR__RXRPC_CALL_COMPLETIONS
571 * Call Tx congestion management modes.
573 enum rxrpc_congest_mode {
574 RXRPC_CALL_SLOW_START,
575 RXRPC_CALL_CONGEST_AVOIDANCE,
576 RXRPC_CALL_PACKET_LOSS,
577 RXRPC_CALL_FAST_RETRANSMIT,
578 NR__RXRPC_CONGEST_MODES
582 * RxRPC call definition
583 * - matched by { connection, call_id }
587 struct rxrpc_connection *conn; /* connection carrying call */
588 struct rxrpc_peer *peer; /* Peer record for remote address */
589 struct rxrpc_local *local; /* Representation of local endpoint */
590 struct rxrpc_sock __rcu *socket; /* socket responsible */
591 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
592 struct key *key; /* Security details */
593 const struct rxrpc_security *security; /* applied security module */
594 struct mutex user_mutex; /* User access mutex */
595 struct sockaddr_rxrpc dest_srx; /* Destination address */
596 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
597 unsigned long ack_lost_at; /* When ACK is figured as lost */
598 unsigned long resend_at; /* When next resend needs to happen */
599 unsigned long ping_at; /* When next to send a ping */
600 unsigned long keepalive_at; /* When next to send a keepalive ping */
601 unsigned long expect_rx_by; /* When we expect to get a packet by */
602 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
603 unsigned long expect_term_by; /* When we expect call termination by */
604 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
605 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
606 struct timer_list timer; /* Combined event timer */
607 struct work_struct destroyer; /* In-process-context destroyer */
608 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
609 struct list_head link; /* link in master call list */
610 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
611 struct hlist_node error_link; /* link in error distribution list */
612 struct list_head accept_link; /* Link in rx->acceptq */
613 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
614 struct list_head sock_link; /* Link in rx->sock_calls */
615 struct rb_node sock_node; /* Node in rx->calls */
616 struct list_head attend_link; /* Link in local->call_attend_q */
617 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
618 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
619 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
620 unsigned long user_call_ID; /* user-defined call ID */
622 unsigned long events;
623 spinlock_t notify_lock; /* Kernel notification lock */
624 rwlock_t state_lock; /* lock for state transition */
625 u32 abort_code; /* Local/remote abort code */
626 int error; /* Local error incurred */
627 enum rxrpc_call_state state; /* current state of call */
628 enum rxrpc_call_completion completion; /* Call completion condition */
630 u8 security_ix; /* Security type */
631 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
632 u32 call_id; /* call ID on connection */
633 u32 cid; /* connection ID plus channel index */
634 u32 security_level; /* Security level selected */
635 int debug_id; /* debug ID for printks */
636 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
637 unsigned short rx_pkt_len; /* Current recvmsg packet len */
639 /* Transmitted data tracking. */
640 spinlock_t tx_lock; /* Transmit queue lock */
641 struct list_head tx_sendmsg; /* Sendmsg prepared packets */
642 struct list_head tx_buffer; /* Buffer of transmissible packets */
643 rxrpc_seq_t tx_bottom; /* First packet in buffer */
644 rxrpc_seq_t tx_transmitted; /* Highest packet transmitted */
645 rxrpc_seq_t tx_prepared; /* Highest Tx slot prepared. */
646 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
647 u16 tx_backoff; /* Delay to insert due to Tx failure */
648 u8 tx_winsize; /* Maximum size of Tx window */
649 #define RXRPC_TX_MAX_WINDOW 128
650 ktime_t tx_last_sent; /* Last time a transmission occurred */
652 /* Received data tracking */
653 struct sk_buff_head recvmsg_queue; /* Queue of packets ready for recvmsg() */
654 struct sk_buff_head rx_oos_queue; /* Queue of out of sequence packets */
656 rxrpc_seq_t rx_highest_seq; /* Higest sequence number received */
657 rxrpc_seq_t rx_consumed; /* Highest packet consumed */
658 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
659 u8 rx_winsize; /* Size of Rx window */
661 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
662 * is fixed, we keep these numbers in terms of segments (ie. DATA
663 * packets) rather than bytes.
665 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
666 u8 cong_cwnd; /* Congestion window size */
667 u8 cong_extra; /* Extra to send for congestion management */
668 u8 cong_ssthresh; /* Slow-start threshold */
669 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
670 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
671 u8 cong_cumul_acks; /* Cumulative ACK count */
672 ktime_t cong_tstamp; /* Last time cwnd was changed */
674 /* Receive-phase ACK management (ACKs we send). */
675 u8 ackr_reason; /* reason to ACK */
676 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
677 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */
678 atomic_t ackr_nr_unacked; /* Number of unacked packets */
679 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
681 #define RXRPC_SACK_SIZE 256
682 /* SACK table for soft-acked packets */
683 u8 ackr_sack_table[RXRPC_SACK_SIZE];
687 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
688 ktime_t rtt_sent_at[4]; /* Time packet sent */
689 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
690 * Mask of pending samples in 8-11 */
691 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
692 #define RXRPC_CALL_RTT_PEND_SHIFT 8
694 /* Transmission-phase ACK management (ACKs we've received). */
695 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
696 rxrpc_seq_t acks_first_seq; /* first sequence number received */
697 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
698 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
699 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
700 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
704 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
706 struct rxrpc_ack_summary {
707 u16 nr_acks; /* Number of ACKs in packet */
708 u16 nr_new_acks; /* Number of new ACKs in packet */
709 u16 nr_rot_new_acks; /* Number of rotated new ACKs */
711 bool saw_nacks; /* Saw NACKs in packet */
712 bool new_low_nack; /* T if new low NACK found */
713 bool retrans_timeo; /* T if reTx due to timeout happened */
714 u8 flight_size; /* Number of unreceived transmissions */
715 /* Place to stash values for tracing */
716 enum rxrpc_congest_mode mode:8;
724 * sendmsg() cmsg-specified parameters.
727 RXRPC_CMD_SEND_DATA, /* send data message */
728 RXRPC_CMD_SEND_ABORT, /* request abort generation */
729 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
730 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
733 struct rxrpc_call_params {
734 s64 tx_total_len; /* Total Tx data length (if send data) */
735 unsigned long user_call_ID; /* User's call ID */
737 u32 hard; /* Maximum lifetime (sec) */
738 u32 idle; /* Max time since last data packet (msec) */
739 u32 normal; /* Max time since last call packet (msec) */
741 u8 nr_timeouts; /* Number of timeouts specified */
742 bool kernel; /* T if kernel is making the call */
743 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
746 struct rxrpc_send_params {
747 struct rxrpc_call_params call;
748 u32 abort_code; /* Abort code to Tx (if abort) */
749 enum rxrpc_command command : 8; /* The command to implement */
750 bool exclusive; /* Shared or exclusive call */
751 bool upgrade; /* If the connection is upgradeable */
755 * Buffer of data to be output as a packet.
759 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
760 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
761 struct rxrpc_call *call; /* Call to which belongs */
762 ktime_t last_sent; /* Time at which last transmitted */
764 rxrpc_seq_t seq; /* Sequence number of this packet */
765 unsigned int call_debug_id;
766 unsigned int debug_id;
767 unsigned int len; /* Amount of data in buffer */
768 unsigned int space; /* Remaining data space */
769 unsigned int offset; /* Offset of fill point */
771 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
772 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
773 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
775 /* The packet for encrypting and DMA'ing. We align it such
776 * that data[] aligns correctly for any crypto blocksize.
778 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
779 struct rxrpc_wire_header wire; /* Network-ready header */
781 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
783 struct rxrpc_ackpacket ack;
790 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
792 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
795 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
797 return !rxrpc_sending_to_server(txb);
800 #include <trace/events/rxrpc.h>
805 extern atomic_t rxrpc_n_rx_skbs;
806 extern struct workqueue_struct *rxrpc_workqueue;
811 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
812 void rxrpc_discard_prealloc(struct rxrpc_sock *);
813 bool rxrpc_new_incoming_call(struct rxrpc_local *, struct rxrpc_peer *,
814 struct rxrpc_connection *, struct sockaddr_rxrpc *,
816 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
817 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
822 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
823 enum rxrpc_propose_ack_trace why);
824 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
825 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
826 enum rxrpc_propose_ack_trace);
827 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
828 void rxrpc_resend(struct rxrpc_call *call, struct sk_buff *ack_skb);
830 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
831 unsigned long expire_at,
833 enum rxrpc_timer_trace why);
835 void rxrpc_input_call_event(struct rxrpc_call *call, struct sk_buff *skb);
840 extern const char *const rxrpc_call_states[];
841 extern const char *const rxrpc_call_completions[];
842 extern struct kmem_cache *rxrpc_call_jar;
844 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what);
845 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
846 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
847 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
848 struct rxrpc_conn_parameters *,
849 struct sockaddr_rxrpc *,
850 struct rxrpc_call_params *, gfp_t,
852 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
854 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
855 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
856 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
857 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
858 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
859 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
860 void rxrpc_cleanup_call(struct rxrpc_call *);
861 void rxrpc_destroy_all_calls(struct rxrpc_net *);
863 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
865 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
868 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
870 return !rxrpc_is_service_call(call);
876 extern unsigned int rxrpc_reap_client_connections;
877 extern unsigned long rxrpc_conn_idle_client_expiry;
878 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
879 extern struct idr rxrpc_client_conn_ids;
881 void rxrpc_destroy_client_conn_ids(void);
882 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
883 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
884 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
885 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
887 void rxrpc_expose_client_call(struct rxrpc_call *);
888 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
889 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
890 void rxrpc_discard_expired_client_conns(struct work_struct *);
891 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
892 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
897 void rxrpc_process_connection(struct work_struct *);
898 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
899 int rxrpc_input_conn_packet(struct rxrpc_connection *conn, struct sk_buff *skb);
904 extern unsigned int rxrpc_connection_expiry;
905 extern unsigned int rxrpc_closed_conn_expiry;
907 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
908 struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *,
909 struct sockaddr_rxrpc *,
911 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
912 void rxrpc_disconnect_call(struct rxrpc_call *);
913 void rxrpc_kill_client_conn(struct rxrpc_connection *);
914 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
915 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
916 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
917 enum rxrpc_conn_trace);
918 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
919 enum rxrpc_conn_trace);
920 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
921 void rxrpc_service_connection_reaper(struct work_struct *);
922 void rxrpc_destroy_all_connections(struct rxrpc_net *);
924 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
926 return conn->out_clientflag;
929 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
931 return !rxrpc_conn_is_client(conn);
934 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
935 unsigned long expire_at)
937 timer_reduce(&conn->timer, expire_at);
943 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
945 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
946 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
947 const struct rxrpc_security *, struct sk_buff *);
948 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
953 void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
954 void rxrpc_implicit_end_call(struct rxrpc_call *, struct sk_buff *);
959 int rxrpc_encap_rcv(struct sock *, struct sk_buff *);
960 void rxrpc_error_report(struct sock *);
961 int rxrpc_io_thread(void *data);
962 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local)
964 wake_up_process(local->io_thread);
970 extern const struct rxrpc_security rxrpc_no_security;
975 extern struct key_type key_type_rxrpc;
977 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
978 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
984 void rxrpc_send_version_request(struct rxrpc_local *local,
985 struct rxrpc_host_header *hdr,
986 struct sk_buff *skb);
991 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
992 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
993 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
994 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
995 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
996 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
997 void rxrpc_destroy_local(struct rxrpc_local *local);
998 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1000 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local,
1001 enum rxrpc_local_trace why)
1003 unsigned int debug_id = local->debug_id;
1006 r = refcount_read(&local->ref);
1007 u = atomic_dec_return(&local->active_users);
1008 trace_rxrpc_local(debug_id, why, r, u);
1012 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1013 enum rxrpc_local_trace why)
1017 r = refcount_read(&local->ref);
1018 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1019 trace_rxrpc_local(local->debug_id, why, r, u);
1023 static inline void rxrpc_see_local(struct rxrpc_local *local,
1024 enum rxrpc_local_trace why)
1028 r = refcount_read(&local->ref);
1029 u = atomic_read(&local->active_users);
1030 trace_rxrpc_local(local->debug_id, why, r, u);
1036 extern unsigned int rxrpc_max_backlog __read_mostly;
1037 extern unsigned long rxrpc_soft_ack_delay;
1038 extern unsigned long rxrpc_idle_ack_delay;
1039 extern unsigned int rxrpc_rx_window_size;
1040 extern unsigned int rxrpc_rx_mtu;
1041 extern unsigned int rxrpc_rx_jumbo_max;
1046 extern unsigned int rxrpc_net_id;
1047 extern struct pernet_operations rxrpc_net_ops;
1049 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1051 return net_generic(net, rxrpc_net_id);
1057 void rxrpc_transmit_ack_packets(struct rxrpc_local *);
1058 int rxrpc_send_abort_packet(struct rxrpc_call *);
1059 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1060 void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb);
1061 void rxrpc_send_keepalive(struct rxrpc_peer *);
1062 void rxrpc_transmit_one(struct rxrpc_call *call, struct rxrpc_txbuf *txb);
1067 void rxrpc_input_error(struct rxrpc_local *, struct sk_buff *);
1068 void rxrpc_peer_keepalive_worker(struct work_struct *);
1073 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1074 const struct sockaddr_rxrpc *);
1075 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1076 struct sockaddr_rxrpc *, gfp_t);
1077 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t,
1078 enum rxrpc_peer_trace);
1079 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1080 struct rxrpc_peer *);
1081 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1082 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1083 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1084 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1085 void rxrpc_put_peer_locked(struct rxrpc_peer *, enum rxrpc_peer_trace);
1090 extern const struct seq_operations rxrpc_call_seq_ops;
1091 extern const struct seq_operations rxrpc_connection_seq_ops;
1092 extern const struct seq_operations rxrpc_peer_seq_ops;
1093 extern const struct seq_operations rxrpc_local_seq_ops;
1098 void rxrpc_notify_socket(struct rxrpc_call *);
1099 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1100 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1101 bool __rxrpc_call_completed(struct rxrpc_call *);
1102 bool rxrpc_call_completed(struct rxrpc_call *);
1103 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1104 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1105 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1108 * Abort a call due to a protocol error.
1110 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1111 struct sk_buff *skb,
1112 const char *eproto_why,
1116 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1118 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1119 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1122 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1123 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1124 (abort_why), (abort_code))
1129 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1130 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1131 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1132 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1138 extern const struct rxrpc_security rxkad;
1144 int __init rxrpc_init_security(void);
1145 const struct rxrpc_security *rxrpc_security_lookup(u8);
1146 void rxrpc_exit_security(void);
1147 int rxrpc_init_client_call_security(struct rxrpc_call *);
1148 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1149 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1151 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1152 struct sk_buff *, u32, u32);
1157 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1162 extern struct key_type key_type_rxrpc_s;
1164 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1169 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1170 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1171 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1172 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1173 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1174 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1175 void rxrpc_purge_queue(struct sk_buff_head *);
1180 int rxrpc_stats_show(struct seq_file *seq, void *v);
1181 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1183 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1184 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1189 #ifdef CONFIG_SYSCTL
1190 extern int __init rxrpc_sysctl_init(void);
1191 extern void rxrpc_sysctl_exit(void);
1193 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1194 static inline void rxrpc_sysctl_exit(void) {}
1200 extern atomic_t rxrpc_nr_txbuf;
1201 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1203 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1204 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1205 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1210 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1212 static inline bool before(u32 seq1, u32 seq2)
1214 return (s32)(seq1 - seq2) < 0;
1216 static inline bool before_eq(u32 seq1, u32 seq2)
1218 return (s32)(seq1 - seq2) <= 0;
1220 static inline bool after(u32 seq1, u32 seq2)
1222 return (s32)(seq1 - seq2) > 0;
1224 static inline bool after_eq(u32 seq1, u32 seq2)
1226 return (s32)(seq1 - seq2) >= 0;
1232 extern unsigned int rxrpc_debug;
1234 #define dbgprintk(FMT,...) \
1235 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1237 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1238 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1239 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1242 #if defined(__KDEBUG)
1243 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1244 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1245 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1247 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1248 #define RXRPC_DEBUG_KENTER 0x01
1249 #define RXRPC_DEBUG_KLEAVE 0x02
1250 #define RXRPC_DEBUG_KDEBUG 0x04
1252 #define _enter(FMT,...) \
1254 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1255 kenter(FMT,##__VA_ARGS__); \
1258 #define _leave(FMT,...) \
1260 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1261 kleave(FMT,##__VA_ARGS__); \
1264 #define _debug(FMT,...) \
1266 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1267 kdebug(FMT,##__VA_ARGS__); \
1271 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1272 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1273 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1277 * debug assertion checking
1279 #if 1 // defined(__KDEBUGALL)
1283 if (unlikely(!(X))) { \
1284 pr_err("Assertion failed\n"); \
1289 #define ASSERTCMP(X, OP, Y) \
1291 __typeof__(X) _x = (X); \
1292 __typeof__(Y) _y = (__typeof__(X))(Y); \
1293 if (unlikely(!(_x OP _y))) { \
1294 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1295 (unsigned long)_x, (unsigned long)_x, #OP, \
1296 (unsigned long)_y, (unsigned long)_y); \
1301 #define ASSERTIF(C, X) \
1303 if (unlikely((C) && !(X))) { \
1304 pr_err("Assertion failed\n"); \
1309 #define ASSERTIFCMP(C, X, OP, Y) \
1311 __typeof__(X) _x = (X); \
1312 __typeof__(Y) _y = (__typeof__(X))(Y); \
1313 if (unlikely((C) && !(_x OP _y))) { \
1314 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1315 (unsigned long)_x, (unsigned long)_x, #OP, \
1316 (unsigned long)_y, (unsigned long)_y); \
1327 #define ASSERTCMP(X, OP, Y) \
1331 #define ASSERTIF(C, X) \
1335 #define ASSERTIFCMP(C, X, OP, Y) \
1339 #endif /* __KDEBUGALL */