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 work_struct processor;
287 struct task_struct *io_thread;
288 struct list_head ack_tx_queue; /* List of ACKs that need sending */
289 spinlock_t ack_tx_lock; /* ACK list lock */
290 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
291 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
292 struct sk_buff_head reject_queue; /* packets awaiting rejection */
293 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
294 struct sk_buff_head rx_queue; /* Received packets */
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 * Bits in the connection flags.
371 enum rxrpc_conn_flag {
372 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
373 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
374 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
375 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
376 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
377 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
378 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
379 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
382 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
383 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
384 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
385 (1UL << RXRPC_CONN_FINAL_ACK_3))
388 * Events that can be raised upon a connection.
390 enum rxrpc_conn_event {
391 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
395 * The connection protocol state.
397 enum rxrpc_conn_proto_state {
398 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
399 RXRPC_CONN_CLIENT, /* Client connection */
400 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
401 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
402 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
403 RXRPC_CONN_SERVICE, /* Service secured connection */
404 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
405 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
406 RXRPC_CONN__NR_STATES
410 * RxRPC client connection bundle.
412 struct rxrpc_bundle {
413 struct rxrpc_local *local; /* Representation of local endpoint */
414 struct rxrpc_peer *peer; /* Remote endpoint */
415 struct key *key; /* Security details */
417 atomic_t active; /* Number of active users */
418 unsigned int debug_id;
419 u32 security_level; /* Security level selected */
420 u16 service_id; /* Service ID for this connection */
421 bool try_upgrade; /* True if the bundle is attempting upgrade */
422 bool alloc_conn; /* True if someone's getting a conn */
423 bool exclusive; /* T if conn is exclusive */
424 bool upgrade; /* T if service ID can be upgraded */
425 short alloc_error; /* Error from last conn allocation */
426 spinlock_t channel_lock;
427 struct rb_node local_node; /* Node in local->client_conns */
428 struct list_head waiting_calls; /* Calls waiting for channels */
429 unsigned long avail_chans; /* Mask of available channels */
430 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
434 * RxRPC connection definition
435 * - matched by { local, peer, epoch, conn_id, direction }
436 * - each connection can only handle four simultaneous calls
438 struct rxrpc_connection {
439 struct rxrpc_conn_proto proto;
440 struct rxrpc_local *local; /* Representation of local endpoint */
441 struct rxrpc_peer *peer; /* Remote endpoint */
442 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
443 struct key *key; /* Security details */
446 atomic_t active; /* Active count for service conns */
448 struct list_head cache_link;
450 unsigned char act_chans; /* Mask of active channels */
451 struct rxrpc_channel {
452 unsigned long final_ack_at; /* Time at which to issue final ACK */
453 struct rxrpc_call __rcu *call; /* Active call */
454 unsigned int call_debug_id; /* call->debug_id */
455 u32 call_id; /* ID of current call */
456 u32 call_counter; /* Call ID counter */
457 u32 last_call; /* ID of last call */
458 u8 last_type; /* Type of last packet */
463 } channels[RXRPC_MAXCALLS];
465 struct timer_list timer; /* Conn event timer */
466 struct work_struct processor; /* connection event processor */
467 struct work_struct destructor; /* In-process-context destroyer */
468 struct rxrpc_bundle *bundle; /* Client connection bundle */
469 struct rb_node service_node; /* Node in peer->service_conns */
470 struct list_head proc_link; /* link in procfs list */
471 struct list_head link; /* link in master connection list */
472 struct sk_buff_head rx_queue; /* received conn-level packets */
474 const struct rxrpc_security *security; /* applied security module */
477 struct crypto_sync_skcipher *cipher; /* encryption handle */
478 struct rxrpc_crypt csum_iv; /* packet checksum base */
479 u32 nonce; /* response re-use preventer */
483 unsigned long events;
484 unsigned long idle_timestamp; /* Time at which last became idle */
485 spinlock_t state_lock; /* state-change lock */
486 enum rxrpc_conn_proto_state state; /* current state of connection */
487 u32 abort_code; /* Abort code of connection abort */
488 int debug_id; /* debug ID for printks */
489 atomic_t serial; /* packet serial number counter */
490 unsigned int hi_serial; /* highest serial number received */
491 u32 service_id; /* Service ID, possibly upgraded */
492 u32 security_level; /* Security level selected */
493 u8 security_ix; /* security type */
494 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
495 u8 bundle_shift; /* Index into bundle->avail_chans */
496 bool exclusive; /* T if conn is exclusive */
497 bool upgrade; /* T if service ID can be upgraded */
498 u16 orig_service_id; /* Originally requested service ID */
499 short error; /* Local error code */
502 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
504 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
507 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
509 return !rxrpc_to_server(sp);
513 * Flags in call->flags.
515 enum rxrpc_call_flag {
516 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
517 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
518 RXRPC_CALL_IS_SERVICE, /* Call is service call */
519 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
520 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
521 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
522 RXRPC_CALL_TX_ALL_ACKED, /* Last packet has been hard-acked */
523 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
524 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
525 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
526 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
527 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
528 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
529 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
530 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
531 RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */
532 RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */
533 RXRPC_CALL_EXCLUSIVE, /* The call uses a once-only connection */
537 * Events that can be raised on a call.
539 enum rxrpc_call_event {
540 RXRPC_CALL_EV_ABORT, /* need to generate abort */
541 RXRPC_CALL_EV_RESEND, /* Tx resend required */
542 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
543 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
547 * The states that a call can be in.
549 enum rxrpc_call_state {
550 RXRPC_CALL_UNINITIALISED,
551 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
552 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
553 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
554 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
555 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
556 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
557 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
558 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
559 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
560 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
561 RXRPC_CALL_COMPLETE, /* - call complete */
562 NR__RXRPC_CALL_STATES
566 * Call completion condition (state == RXRPC_CALL_COMPLETE).
568 enum rxrpc_call_completion {
569 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
570 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
571 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
572 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
573 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
574 NR__RXRPC_CALL_COMPLETIONS
578 * Call Tx congestion management modes.
580 enum rxrpc_congest_mode {
581 RXRPC_CALL_SLOW_START,
582 RXRPC_CALL_CONGEST_AVOIDANCE,
583 RXRPC_CALL_PACKET_LOSS,
584 RXRPC_CALL_FAST_RETRANSMIT,
585 NR__RXRPC_CONGEST_MODES
589 * RxRPC call definition
590 * - matched by { connection, call_id }
594 struct rxrpc_connection *conn; /* connection carrying call */
595 struct rxrpc_peer *peer; /* Peer record for remote address */
596 struct rxrpc_local *local; /* Representation of local endpoint */
597 struct rxrpc_sock __rcu *socket; /* socket responsible */
598 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
599 struct key *key; /* Security details */
600 const struct rxrpc_security *security; /* applied security module */
601 struct mutex user_mutex; /* User access mutex */
602 struct sockaddr_rxrpc dest_srx; /* Destination address */
603 unsigned long delay_ack_at; /* When DELAY ACK needs to happen */
604 unsigned long ack_lost_at; /* When ACK is figured as lost */
605 unsigned long resend_at; /* When next resend needs to happen */
606 unsigned long ping_at; /* When next to send a ping */
607 unsigned long keepalive_at; /* When next to send a keepalive ping */
608 unsigned long expect_rx_by; /* When we expect to get a packet by */
609 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
610 unsigned long expect_term_by; /* When we expect call termination by */
611 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
612 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
613 struct timer_list timer; /* Combined event timer */
614 struct work_struct processor; /* Event processor */
615 struct work_struct destroyer; /* In-process-context destroyer */
616 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
617 struct list_head link; /* link in master call list */
618 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
619 struct hlist_node error_link; /* link in error distribution list */
620 struct list_head accept_link; /* Link in rx->acceptq */
621 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
622 struct list_head sock_link; /* Link in rx->sock_calls */
623 struct rb_node sock_node; /* Node in rx->calls */
624 struct list_head attend_link; /* Link in local->call_attend_q */
625 struct rxrpc_txbuf *tx_pending; /* Tx buffer being filled */
626 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
627 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
628 unsigned long user_call_ID; /* user-defined call ID */
630 unsigned long events;
631 spinlock_t notify_lock; /* Kernel notification lock */
632 rwlock_t state_lock; /* lock for state transition */
633 u32 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 u8 cong_cwnd; /* Congestion window size */
675 u8 cong_extra; /* Extra to send for congestion management */
676 u8 cong_ssthresh; /* Slow-start threshold */
677 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
678 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
679 u8 cong_cumul_acks; /* Cumulative ACK count */
680 ktime_t cong_tstamp; /* Last time cwnd was changed */
682 /* Receive-phase ACK management (ACKs we send). */
683 u8 ackr_reason; /* reason to ACK */
684 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
685 atomic64_t ackr_window; /* Base (in LSW) and top (in MSW) of SACK window */
686 atomic_t ackr_nr_unacked; /* Number of unacked packets */
687 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
689 #define RXRPC_SACK_SIZE 256
690 /* SACK table for soft-acked packets */
691 u8 ackr_sack_table[RXRPC_SACK_SIZE];
695 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
696 ktime_t rtt_sent_at[4]; /* Time packet sent */
697 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
698 * Mask of pending samples in 8-11 */
699 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
700 #define RXRPC_CALL_RTT_PEND_SHIFT 8
702 /* Transmission-phase ACK management (ACKs we've received). */
703 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
704 rxrpc_seq_t acks_first_seq; /* first sequence number received */
705 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
706 rxrpc_seq_t acks_hard_ack; /* Latest hard-ack point */
707 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
708 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
709 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
710 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
711 struct sk_buff *acks_soft_tbl; /* The last ACK packet with NAKs in it */
712 spinlock_t acks_ack_lock; /* Access to ->acks_last_ack */
716 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
718 struct rxrpc_ack_summary {
719 u16 nr_acks; /* Number of ACKs in packet */
720 u16 nr_new_acks; /* Number of new ACKs in packet */
721 u16 nr_rot_new_acks; /* Number of rotated new ACKs */
723 bool saw_nacks; /* Saw NACKs in packet */
724 bool new_low_nack; /* T if new low NACK found */
725 bool retrans_timeo; /* T if reTx due to timeout happened */
726 u8 flight_size; /* Number of unreceived transmissions */
727 /* Place to stash values for tracing */
728 enum rxrpc_congest_mode mode:8;
736 * sendmsg() cmsg-specified parameters.
739 RXRPC_CMD_SEND_DATA, /* send data message */
740 RXRPC_CMD_SEND_ABORT, /* request abort generation */
741 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
742 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
745 struct rxrpc_call_params {
746 s64 tx_total_len; /* Total Tx data length (if send data) */
747 unsigned long user_call_ID; /* User's call ID */
749 u32 hard; /* Maximum lifetime (sec) */
750 u32 idle; /* Max time since last data packet (msec) */
751 u32 normal; /* Max time since last call packet (msec) */
753 u8 nr_timeouts; /* Number of timeouts specified */
754 bool kernel; /* T if kernel is making the call */
755 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
758 struct rxrpc_send_params {
759 struct rxrpc_call_params call;
760 u32 abort_code; /* Abort code to Tx (if abort) */
761 enum rxrpc_command command : 8; /* The command to implement */
762 bool exclusive; /* Shared or exclusive call */
763 bool upgrade; /* If the connection is upgradeable */
767 * Buffer of data to be output as a packet.
771 struct list_head call_link; /* Link in call->tx_sendmsg/tx_buffer */
772 struct list_head tx_link; /* Link in live Enc queue or Tx queue */
773 struct rxrpc_call *call; /* Call to which belongs */
774 ktime_t last_sent; /* Time at which last transmitted */
776 rxrpc_seq_t seq; /* Sequence number of this packet */
777 unsigned int call_debug_id;
778 unsigned int debug_id;
779 unsigned int len; /* Amount of data in buffer */
780 unsigned int space; /* Remaining data space */
781 unsigned int offset; /* Offset of fill point */
783 #define RXRPC_TXBUF_LAST 0 /* Set if last packet in Tx phase */
784 #define RXRPC_TXBUF_RESENT 1 /* Set if has been resent */
785 u8 /*enum rxrpc_propose_ack_trace*/ ack_why; /* If ack, why */
787 /* The packet for encrypting and DMA'ing. We align it such
788 * that data[] aligns correctly for any crypto blocksize.
790 u8 pad[64 - sizeof(struct rxrpc_wire_header)];
791 struct rxrpc_wire_header wire; /* Network-ready header */
793 u8 data[RXRPC_JUMBO_DATALEN]; /* Data packet */
795 struct rxrpc_ackpacket ack;
802 static inline bool rxrpc_sending_to_server(const struct rxrpc_txbuf *txb)
804 return txb->wire.flags & RXRPC_CLIENT_INITIATED;
807 static inline bool rxrpc_sending_to_client(const struct rxrpc_txbuf *txb)
809 return !rxrpc_sending_to_server(txb);
812 #include <trace/events/rxrpc.h>
817 extern atomic_t rxrpc_n_rx_skbs;
818 extern struct workqueue_struct *rxrpc_workqueue;
823 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
824 void rxrpc_discard_prealloc(struct rxrpc_sock *);
825 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
828 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
829 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
834 void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial,
835 enum rxrpc_propose_ack_trace why);
836 void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace);
837 void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t,
838 enum rxrpc_propose_ack_trace);
839 void rxrpc_shrink_call_tx_buffer(struct rxrpc_call *);
840 void rxrpc_process_call(struct work_struct *);
842 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
843 unsigned long expire_at,
845 enum rxrpc_timer_trace why);
850 extern const char *const rxrpc_call_states[];
851 extern const char *const rxrpc_call_completions[];
852 extern struct kmem_cache *rxrpc_call_jar;
854 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what);
855 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
856 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
857 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
858 struct rxrpc_conn_parameters *,
859 struct sockaddr_rxrpc *,
860 struct rxrpc_call_params *, gfp_t,
862 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
864 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
865 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
866 void rxrpc_queue_call(struct rxrpc_call *, enum rxrpc_call_trace);
867 void rxrpc_see_call(struct rxrpc_call *, enum rxrpc_call_trace);
868 bool rxrpc_try_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
869 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
870 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
871 void rxrpc_cleanup_call(struct rxrpc_call *);
872 void rxrpc_destroy_all_calls(struct rxrpc_net *);
874 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
876 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
879 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
881 return !rxrpc_is_service_call(call);
887 extern unsigned int rxrpc_reap_client_connections;
888 extern unsigned long rxrpc_conn_idle_client_expiry;
889 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
890 extern struct idr rxrpc_client_conn_ids;
892 void rxrpc_destroy_client_conn_ids(void);
893 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
894 void rxrpc_put_bundle(struct rxrpc_bundle *, enum rxrpc_bundle_trace);
895 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
896 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
898 void rxrpc_expose_client_call(struct rxrpc_call *);
899 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
900 void rxrpc_put_client_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
901 void rxrpc_discard_expired_client_conns(struct work_struct *);
902 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
903 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
908 void rxrpc_process_connection(struct work_struct *);
909 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
914 extern unsigned int rxrpc_connection_expiry;
915 extern unsigned int rxrpc_closed_conn_expiry;
917 struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *, gfp_t);
918 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
920 struct rxrpc_peer **);
921 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
922 void rxrpc_disconnect_call(struct rxrpc_call *);
923 void rxrpc_kill_client_conn(struct rxrpc_connection *);
924 void rxrpc_queue_conn(struct rxrpc_connection *, enum rxrpc_conn_trace);
925 void rxrpc_see_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
926 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *,
927 enum rxrpc_conn_trace);
928 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *,
929 enum rxrpc_conn_trace);
930 void rxrpc_put_connection(struct rxrpc_connection *, enum rxrpc_conn_trace);
931 void rxrpc_service_connection_reaper(struct work_struct *);
932 void rxrpc_destroy_all_connections(struct rxrpc_net *);
934 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
936 return conn->out_clientflag;
939 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
941 return !rxrpc_conn_is_client(conn);
944 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
945 unsigned long expire_at)
947 timer_reduce(&conn->timer, expire_at);
953 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
955 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
956 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
957 const struct rxrpc_security *, struct sk_buff *);
958 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
963 void rxrpc_input_call_event(struct rxrpc_call *, struct sk_buff *);
964 void rxrpc_input_implicit_end_call(struct rxrpc_sock *, struct rxrpc_connection *,
965 struct rxrpc_call *);
970 int rxrpc_encap_rcv(struct sock *, struct sk_buff *);
971 void rxrpc_error_report(struct sock *);
972 int rxrpc_io_thread(void *data);
973 static inline void rxrpc_wake_up_io_thread(struct rxrpc_local *local)
975 wake_up_process(local->io_thread);
981 extern const struct rxrpc_security rxrpc_no_security;
986 extern struct key_type key_type_rxrpc;
988 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
989 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
995 extern void rxrpc_process_local_events(struct rxrpc_local *);
1000 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1001 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
1002 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
1003 void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
1004 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
1005 void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
1006 void rxrpc_queue_local(struct rxrpc_local *);
1007 void rxrpc_destroy_local(struct rxrpc_local *local);
1008 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1010 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local,
1011 enum rxrpc_local_trace why)
1013 unsigned int debug_id = local->debug_id;
1016 r = refcount_read(&local->ref);
1017 u = atomic_dec_return(&local->active_users);
1018 trace_rxrpc_local(debug_id, why, r, u);
1022 static inline bool __rxrpc_use_local(struct rxrpc_local *local,
1023 enum rxrpc_local_trace why)
1027 r = refcount_read(&local->ref);
1028 u = atomic_fetch_add_unless(&local->active_users, 1, 0);
1029 trace_rxrpc_local(local->debug_id, why, r, u);
1033 static inline void rxrpc_see_local(struct rxrpc_local *local,
1034 enum rxrpc_local_trace why)
1038 r = refcount_read(&local->ref);
1039 u = atomic_read(&local->active_users);
1040 trace_rxrpc_local(local->debug_id, why, r, u);
1046 extern unsigned int rxrpc_max_backlog __read_mostly;
1047 extern unsigned long rxrpc_soft_ack_delay;
1048 extern unsigned long rxrpc_idle_ack_delay;
1049 extern unsigned int rxrpc_rx_window_size;
1050 extern unsigned int rxrpc_rx_mtu;
1051 extern unsigned int rxrpc_rx_jumbo_max;
1056 extern unsigned int rxrpc_net_id;
1057 extern struct pernet_operations rxrpc_net_ops;
1059 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1061 return net_generic(net, rxrpc_net_id);
1067 void rxrpc_transmit_ack_packets(struct rxrpc_local *);
1068 int rxrpc_send_abort_packet(struct rxrpc_call *);
1069 int rxrpc_send_data_packet(struct rxrpc_call *, struct rxrpc_txbuf *);
1070 void rxrpc_reject_packets(struct rxrpc_local *);
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_sock *, struct rxrpc_local *,
1086 struct sockaddr_rxrpc *, gfp_t);
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_sock *, struct rxrpc_local *,
1090 struct rxrpc_peer *);
1091 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1092 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1093 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *, enum rxrpc_peer_trace);
1094 void rxrpc_put_peer(struct rxrpc_peer *, enum rxrpc_peer_trace);
1095 void rxrpc_put_peer_locked(struct rxrpc_peer *, enum rxrpc_peer_trace);
1100 extern const struct seq_operations rxrpc_call_seq_ops;
1101 extern const struct seq_operations rxrpc_connection_seq_ops;
1102 extern const struct seq_operations rxrpc_peer_seq_ops;
1103 extern const struct seq_operations rxrpc_local_seq_ops;
1108 void rxrpc_notify_socket(struct rxrpc_call *);
1109 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1110 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1111 bool __rxrpc_call_completed(struct rxrpc_call *);
1112 bool rxrpc_call_completed(struct rxrpc_call *);
1113 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1114 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1115 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1118 * Abort a call due to a protocol error.
1120 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1121 struct sk_buff *skb,
1122 const char *eproto_why,
1126 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1128 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1129 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1132 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1133 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1134 (abort_why), (abort_code))
1139 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1140 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1141 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1142 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1148 extern const struct rxrpc_security rxkad;
1154 int __init rxrpc_init_security(void);
1155 const struct rxrpc_security *rxrpc_security_lookup(u8);
1156 void rxrpc_exit_security(void);
1157 int rxrpc_init_client_call_security(struct rxrpc_call *);
1158 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1159 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1161 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1162 struct sk_buff *, u32, u32);
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_packet_destructor(struct sk_buff *);
1181 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1182 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1183 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1184 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1185 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1186 void rxrpc_purge_queue(struct sk_buff_head *);
1191 int rxrpc_stats_show(struct seq_file *seq, void *v);
1192 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1194 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1195 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1200 #ifdef CONFIG_SYSCTL
1201 extern int __init rxrpc_sysctl_init(void);
1202 extern void rxrpc_sysctl_exit(void);
1204 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1205 static inline void rxrpc_sysctl_exit(void) {}
1211 extern atomic_t rxrpc_nr_txbuf;
1212 struct rxrpc_txbuf *rxrpc_alloc_txbuf(struct rxrpc_call *call, u8 packet_type,
1214 void rxrpc_get_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1215 void rxrpc_see_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1216 void rxrpc_put_txbuf(struct rxrpc_txbuf *txb, enum rxrpc_txbuf_trace what);
1221 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1223 static inline bool before(u32 seq1, u32 seq2)
1225 return (s32)(seq1 - seq2) < 0;
1227 static inline bool before_eq(u32 seq1, u32 seq2)
1229 return (s32)(seq1 - seq2) <= 0;
1231 static inline bool after(u32 seq1, u32 seq2)
1233 return (s32)(seq1 - seq2) > 0;
1235 static inline bool after_eq(u32 seq1, u32 seq2)
1237 return (s32)(seq1 - seq2) >= 0;
1243 extern unsigned int rxrpc_debug;
1245 #define dbgprintk(FMT,...) \
1246 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1248 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1249 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1250 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1253 #if defined(__KDEBUG)
1254 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1255 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1256 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1258 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1259 #define RXRPC_DEBUG_KENTER 0x01
1260 #define RXRPC_DEBUG_KLEAVE 0x02
1261 #define RXRPC_DEBUG_KDEBUG 0x04
1263 #define _enter(FMT,...) \
1265 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1266 kenter(FMT,##__VA_ARGS__); \
1269 #define _leave(FMT,...) \
1271 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1272 kleave(FMT,##__VA_ARGS__); \
1275 #define _debug(FMT,...) \
1277 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1278 kdebug(FMT,##__VA_ARGS__); \
1282 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1283 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1284 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1288 * debug assertion checking
1290 #if 1 // defined(__KDEBUGALL)
1294 if (unlikely(!(X))) { \
1295 pr_err("Assertion failed\n"); \
1300 #define ASSERTCMP(X, OP, Y) \
1302 __typeof__(X) _x = (X); \
1303 __typeof__(Y) _y = (__typeof__(X))(Y); \
1304 if (unlikely(!(_x OP _y))) { \
1305 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1306 (unsigned long)_x, (unsigned long)_x, #OP, \
1307 (unsigned long)_y, (unsigned long)_y); \
1312 #define ASSERTIF(C, X) \
1314 if (unlikely((C) && !(X))) { \
1315 pr_err("Assertion failed\n"); \
1320 #define ASSERTIFCMP(C, X, OP, Y) \
1322 __typeof__(X) _x = (X); \
1323 __typeof__(Y) _y = (__typeof__(X))(Y); \
1324 if (unlikely((C) && !(_x OP _y))) { \
1325 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1326 (unsigned long)_x, (unsigned long)_x, #OP, \
1327 (unsigned long)_y, (unsigned long)_y); \
1338 #define ASSERTCMP(X, OP, Y) \
1342 #define ASSERTIF(C, X) \
1346 #define ASSERTIFCMP(C, X, OP, Y) \
1350 #endif /* __KDEBUGALL */