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;
34 * Mark applied to socket buffers in skb->mark. skb->priority is used
35 * to pass supplementary information.
38 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
39 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
43 * sk_state for RxRPC sockets
47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
48 RXRPC_CLIENT_BOUND, /* client local address bound */
49 RXRPC_SERVER_BOUND, /* server local address bound */
50 RXRPC_SERVER_BOUND2, /* second server local address bound */
51 RXRPC_SERVER_LISTENING, /* server listening for connections */
52 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
53 RXRPC_CLOSE, /* socket is being closed */
57 * Per-network namespace data.
60 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
61 u32 epoch; /* Local epoch for detecting local-end reset */
62 struct list_head calls; /* List of calls active in this namespace */
63 spinlock_t call_lock; /* Lock for ->calls */
64 atomic_t nr_calls; /* Count of allocated calls */
67 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
68 struct list_head service_conns; /* Service conns in this namespace */
69 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
70 struct work_struct service_conn_reaper;
71 struct timer_list service_conn_reap_timer;
75 bool kill_all_client_conns;
76 atomic_t nr_client_conns;
77 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
78 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
79 struct list_head idle_client_conns;
80 struct work_struct client_conn_reaper;
81 struct timer_list client_conn_reap_timer;
83 struct hlist_head local_endpoints;
84 struct mutex local_mutex; /* Lock for ->local_endpoints */
86 DECLARE_HASHTABLE (peer_hash, 10);
87 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
89 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
90 u8 peer_keepalive_cursor;
91 time64_t peer_keepalive_base;
92 struct list_head peer_keepalive[32];
93 struct list_head peer_keepalive_new;
94 struct timer_list peer_keepalive_timer;
95 struct work_struct peer_keepalive_work;
97 atomic_t stat_tx_data;
98 atomic_t stat_tx_data_retrans;
99 atomic_t stat_tx_data_send;
100 atomic_t stat_tx_data_send_frag;
101 atomic_t stat_rx_data;
102 atomic_t stat_rx_data_reqack;
103 atomic_t stat_rx_data_jumbo;
105 atomic_t stat_tx_ack_fill;
106 atomic_t stat_tx_ack_send;
107 atomic_t stat_tx_ack_skip;
108 atomic_t stat_tx_acks[256];
109 atomic_t stat_rx_acks[256];
111 atomic_t stat_why_req_ack[8];
115 * Service backlog preallocation.
117 * This contains circular buffers of preallocated peers, connections and calls
118 * for incoming service calls and their head and tail pointers. This allows
119 * calls to be set up in the data_ready handler, thereby avoiding the need to
120 * shuffle packets around so much.
122 struct rxrpc_backlog {
123 unsigned short peer_backlog_head;
124 unsigned short peer_backlog_tail;
125 unsigned short conn_backlog_head;
126 unsigned short conn_backlog_tail;
127 unsigned short call_backlog_head;
128 unsigned short call_backlog_tail;
129 #define RXRPC_BACKLOG_MAX 32
130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
136 * RxRPC socket definition
139 /* WARNING: sk has to be the first member */
141 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
142 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
143 struct rxrpc_local *local; /* local endpoint */
144 struct rxrpc_backlog *backlog; /* Preallocation for services */
145 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
146 struct list_head sock_calls; /* List of calls owned by this socket */
147 struct list_head to_be_accepted; /* calls awaiting acceptance */
148 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
149 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
150 struct key *key; /* security for this socket */
151 struct key *securities; /* list of server security descriptors */
152 struct rb_root calls; /* User ID -> call mapping */
154 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
155 rwlock_t call_lock; /* lock for calls */
156 u32 min_sec_level; /* minimum security level */
157 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
158 bool exclusive; /* Exclusive connection for a client socket */
159 u16 second_service; /* Additional service bound to the endpoint */
161 /* Service upgrade information */
162 u16 from; /* Service ID to upgrade (if not 0) */
163 u16 to; /* service ID to upgrade to */
165 sa_family_t family; /* Protocol family created with */
166 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
167 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
170 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
173 * CPU-byteorder normalised Rx packet header.
175 struct rxrpc_host_header {
176 u32 epoch; /* client boot timestamp */
177 u32 cid; /* connection and channel ID */
178 u32 callNumber; /* call ID (0 for connection-level packets) */
179 u32 seq; /* sequence number of pkt in call stream */
180 u32 serial; /* serial number of pkt sent to network */
181 u8 type; /* packet type */
182 u8 flags; /* packet flags */
183 u8 userStatus; /* app-layer defined status */
184 u8 securityIndex; /* security protocol ID */
186 u16 _rsvd; /* reserved */
187 u16 cksum; /* kerberos security checksum */
189 u16 serviceId; /* service ID */
193 * RxRPC socket buffer private variables
194 * - max 48 bytes (struct sk_buff::cb)
196 struct rxrpc_skb_priv {
197 atomic_t nr_ring_pins; /* Number of rxtx ring pins */
198 u8 nr_subpackets; /* Number of subpackets */
199 u8 rx_flags; /* Received packet flags */
200 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */
202 int remain; /* amount of space remaining for next write */
204 /* List of requested ACKs on subpackets */
205 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) /
209 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
212 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
215 * RxRPC security module interface
217 struct rxrpc_security {
218 const char *name; /* name of this service */
219 u8 security_index; /* security type provided */
220 u32 no_key_abort; /* Abort code indicating no key */
222 /* Initialise a security service */
225 /* Clean up a security service */
228 /* Parse the information from a server key */
229 int (*preparse_server_key)(struct key_preparsed_payload *);
231 /* Clean up the preparse buffer after parsing a server key */
232 void (*free_preparse_server_key)(struct key_preparsed_payload *);
234 /* Destroy the payload of a server key */
235 void (*destroy_server_key)(struct key *);
237 /* Describe a server key */
238 void (*describe_server_key)(const struct key *, struct seq_file *);
240 /* initialise a connection's security */
241 int (*init_connection_security)(struct rxrpc_connection *,
242 struct rxrpc_key_token *);
244 /* Work out how much data we can store in a packet, given an estimate
245 * of the amount of data remaining.
247 int (*how_much_data)(struct rxrpc_call *, size_t,
248 size_t *, size_t *, size_t *);
250 /* impose security on a packet */
251 int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t);
253 /* verify the security on a received packet */
254 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
255 unsigned int, unsigned int, rxrpc_seq_t, u16);
257 /* Free crypto request on a call */
258 void (*free_call_crypto)(struct rxrpc_call *);
260 /* Locate the data in a received packet that has been verified. */
261 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
262 unsigned int *, unsigned int *);
264 /* issue a challenge */
265 int (*issue_challenge)(struct rxrpc_connection *);
267 /* respond to a challenge */
268 int (*respond_to_challenge)(struct rxrpc_connection *,
272 /* verify a response */
273 int (*verify_response)(struct rxrpc_connection *,
277 /* clear connection security */
278 void (*clear)(struct rxrpc_connection *);
282 * RxRPC local transport endpoint description
283 * - owned by a single AF_RXRPC socket
284 * - pointed to by transport socket struct sk_user_data
288 atomic_t active_users; /* Number of users of the local endpoint */
289 refcount_t ref; /* Number of references to the structure */
290 struct rxrpc_net *rxnet; /* The network ns in which this resides */
291 struct hlist_node link;
292 struct socket *socket; /* my UDP socket */
293 struct work_struct processor;
294 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
295 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
296 struct sk_buff_head reject_queue; /* packets awaiting rejection */
297 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
298 struct rb_root client_bundles; /* Client connection bundles by socket params */
299 spinlock_t client_bundles_lock; /* Lock for client_bundles */
300 spinlock_t lock; /* access lock */
301 rwlock_t services_lock; /* lock for services list */
302 int debug_id; /* debug ID for printks */
304 bool service_closed; /* Service socket closed */
305 struct sockaddr_rxrpc srx; /* local address */
309 * RxRPC remote transport endpoint definition
310 * - matched by local endpoint, remote port, address and protocol type
313 struct rcu_head rcu; /* This must be first */
315 unsigned long hash_key;
316 struct hlist_node hash_link;
317 struct rxrpc_local *local;
318 struct hlist_head error_targets; /* targets for net error distribution */
319 struct rb_root service_conns; /* Service connections */
320 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
321 time64_t last_tx_at; /* Last time packet sent here */
322 seqlock_t service_conn_lock;
323 spinlock_t lock; /* access lock */
324 unsigned int if_mtu; /* interface MTU for this peer */
325 unsigned int mtu; /* network MTU for this peer */
326 unsigned int maxdata; /* data size (MTU - hdrsize) */
327 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
328 int debug_id; /* debug ID for printks */
329 struct sockaddr_rxrpc srx; /* remote address */
331 /* calculated RTT cache */
332 #define RXRPC_RTT_CACHE_SIZE 32
333 spinlock_t rtt_input_lock; /* RTT lock for input routine */
334 ktime_t rtt_last_req; /* Time of last RTT request */
335 unsigned int rtt_count; /* Number of samples we've got */
337 u32 srtt_us; /* smoothed round trip time << 3 in usecs */
338 u32 mdev_us; /* medium deviation */
339 u32 mdev_max_us; /* maximal mdev for the last rtt period */
340 u32 rttvar_us; /* smoothed mdev_max */
341 u32 rto_j; /* Retransmission timeout in jiffies */
342 u8 backoff; /* Backoff timeout */
344 u8 cong_cwnd; /* Congestion window size */
348 * Keys for matching a connection.
350 struct rxrpc_conn_proto {
353 u32 epoch; /* epoch of this connection */
354 u32 cid; /* connection ID */
360 struct rxrpc_conn_parameters {
361 struct rxrpc_local *local; /* Representation of local endpoint */
362 struct rxrpc_peer *peer; /* Remote endpoint */
363 struct key *key; /* Security details */
364 bool exclusive; /* T if conn is exclusive */
365 bool upgrade; /* T if service ID can be upgraded */
366 u16 service_id; /* Service ID for this connection */
367 u32 security_level; /* Security level selected */
371 * Bits in the connection flags.
373 enum rxrpc_conn_flag {
374 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
375 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
376 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
377 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
378 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
379 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
380 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
381 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
384 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
385 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
386 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
387 (1UL << RXRPC_CONN_FINAL_ACK_3))
390 * Events that can be raised upon a connection.
392 enum rxrpc_conn_event {
393 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
397 * The connection protocol state.
399 enum rxrpc_conn_proto_state {
400 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
401 RXRPC_CONN_CLIENT, /* Client connection */
402 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
403 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
404 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
405 RXRPC_CONN_SERVICE, /* Service secured connection */
406 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
407 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
408 RXRPC_CONN__NR_STATES
412 * RxRPC client connection bundle.
414 struct rxrpc_bundle {
415 struct rxrpc_conn_parameters params;
417 unsigned int debug_id;
418 bool try_upgrade; /* True if the bundle is attempting upgrade */
419 bool alloc_conn; /* True if someone's getting a conn */
420 short alloc_error; /* Error from last conn allocation */
421 spinlock_t channel_lock;
422 struct rb_node local_node; /* Node in local->client_conns */
423 struct list_head waiting_calls; /* Calls waiting for channels */
424 unsigned long avail_chans; /* Mask of available channels */
425 struct rxrpc_connection *conns[4]; /* The connections in the bundle (max 4) */
429 * RxRPC connection definition
430 * - matched by { local, peer, epoch, conn_id, direction }
431 * - each connection can only handle four simultaneous calls
433 struct rxrpc_connection {
434 struct rxrpc_conn_proto proto;
435 struct rxrpc_conn_parameters params;
439 struct list_head cache_link;
441 unsigned char act_chans; /* Mask of active channels */
442 struct rxrpc_channel {
443 unsigned long final_ack_at; /* Time at which to issue final ACK */
444 struct rxrpc_call __rcu *call; /* Active call */
445 unsigned int call_debug_id; /* call->debug_id */
446 u32 call_id; /* ID of current call */
447 u32 call_counter; /* Call ID counter */
448 u32 last_call; /* ID of last call */
449 u8 last_type; /* Type of last packet */
454 } channels[RXRPC_MAXCALLS];
456 struct timer_list timer; /* Conn event timer */
457 struct work_struct processor; /* connection event processor */
458 struct rxrpc_bundle *bundle; /* Client connection bundle */
459 struct rb_node service_node; /* Node in peer->service_conns */
460 struct list_head proc_link; /* link in procfs list */
461 struct list_head link; /* link in master connection list */
462 struct sk_buff_head rx_queue; /* received conn-level packets */
464 const struct rxrpc_security *security; /* applied security module */
467 struct crypto_sync_skcipher *cipher; /* encryption handle */
468 struct rxrpc_crypt csum_iv; /* packet checksum base */
469 u32 nonce; /* response re-use preventer */
473 unsigned long events;
474 unsigned long idle_timestamp; /* Time at which last became idle */
475 spinlock_t state_lock; /* state-change lock */
476 enum rxrpc_conn_proto_state state; /* current state of connection */
477 u32 abort_code; /* Abort code of connection abort */
478 int debug_id; /* debug ID for printks */
479 atomic_t serial; /* packet serial number counter */
480 unsigned int hi_serial; /* highest serial number received */
481 u32 service_id; /* Service ID, possibly upgraded */
482 u8 security_ix; /* security type */
483 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
484 u8 bundle_shift; /* Index into bundle->avail_chans */
485 short error; /* Local error code */
488 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
490 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
493 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
495 return !rxrpc_to_server(sp);
499 * Flags in call->flags.
501 enum rxrpc_call_flag {
502 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
503 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
504 RXRPC_CALL_IS_SERVICE, /* Call is service call */
505 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
506 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
507 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
508 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
509 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
510 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
511 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
512 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
513 RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */
514 RXRPC_CALL_KERNEL, /* The call was made by the kernel */
515 RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */
519 * Events that can be raised on a call.
521 enum rxrpc_call_event {
522 RXRPC_CALL_EV_ACK, /* need to generate ACK */
523 RXRPC_CALL_EV_ABORT, /* need to generate abort */
524 RXRPC_CALL_EV_RESEND, /* Tx resend required */
525 RXRPC_CALL_EV_PING, /* Ping send required */
526 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
527 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
531 * The states that a call can be in.
533 enum rxrpc_call_state {
534 RXRPC_CALL_UNINITIALISED,
535 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
536 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
537 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
538 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
539 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
540 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
541 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
542 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
543 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
544 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
545 RXRPC_CALL_COMPLETE, /* - call complete */
546 NR__RXRPC_CALL_STATES
550 * Call completion condition (state == RXRPC_CALL_COMPLETE).
552 enum rxrpc_call_completion {
553 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
554 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
555 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
556 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
557 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
558 NR__RXRPC_CALL_COMPLETIONS
562 * Call Tx congestion management modes.
564 enum rxrpc_congest_mode {
565 RXRPC_CALL_SLOW_START,
566 RXRPC_CALL_CONGEST_AVOIDANCE,
567 RXRPC_CALL_PACKET_LOSS,
568 RXRPC_CALL_FAST_RETRANSMIT,
569 NR__RXRPC_CONGEST_MODES
573 * RxRPC call definition
574 * - matched by { connection, call_id }
578 struct rxrpc_connection *conn; /* connection carrying call */
579 struct rxrpc_peer *peer; /* Peer record for remote address */
580 struct rxrpc_sock __rcu *socket; /* socket responsible */
581 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
582 const struct rxrpc_security *security; /* applied security module */
583 struct mutex user_mutex; /* User access mutex */
584 unsigned long ack_at; /* When deferred ACK needs to happen */
585 unsigned long ack_lost_at; /* When ACK is figured as lost */
586 unsigned long resend_at; /* When next resend needs to happen */
587 unsigned long ping_at; /* When next to send a ping */
588 unsigned long keepalive_at; /* When next to send a keepalive ping */
589 unsigned long expect_rx_by; /* When we expect to get a packet by */
590 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
591 unsigned long expect_term_by; /* When we expect call termination by */
592 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
593 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
594 struct skcipher_request *cipher_req; /* Packet cipher request buffer */
595 struct timer_list timer; /* Combined event timer */
596 struct work_struct processor; /* Event processor */
597 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
598 struct list_head link; /* link in master call list */
599 struct list_head chan_wait_link; /* Link in conn->bundle->waiting_calls */
600 struct hlist_node error_link; /* link in error distribution list */
601 struct list_head accept_link; /* Link in rx->acceptq */
602 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
603 struct list_head sock_link; /* Link in rx->sock_calls */
604 struct rb_node sock_node; /* Node in rx->calls */
605 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
606 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
607 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
608 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
609 unsigned long user_call_ID; /* user-defined call ID */
611 unsigned long events;
613 spinlock_t notify_lock; /* Kernel notification lock */
614 rwlock_t state_lock; /* lock for state transition */
615 u32 abort_code; /* Local/remote abort code */
616 int error; /* Local error incurred */
617 enum rxrpc_call_state state; /* current state of call */
618 enum rxrpc_call_completion completion; /* Call completion condition */
620 u16 service_id; /* service ID */
621 u8 security_ix; /* Security type */
622 enum rxrpc_interruptibility interruptibility; /* At what point call may be interrupted */
623 u32 call_id; /* call ID on connection */
624 u32 cid; /* connection ID plus channel index */
625 int debug_id; /* debug ID for printks */
626 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
627 unsigned short rx_pkt_len; /* Current recvmsg packet len */
628 bool rx_pkt_last; /* Current recvmsg packet is last */
630 /* Rx/Tx circular buffer, depending on phase.
632 * In the Rx phase, packets are annotated with 0 or the number of the
633 * segment of a jumbo packet each buffer refers to. There can be up to
634 * 47 segments in a maximum-size UDP packet.
636 * In the Tx phase, packets are annotated with which buffers have been
639 #define RXRPC_RXTX_BUFF_SIZE 64
640 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
641 #define RXRPC_INIT_RX_WINDOW_SIZE 63
642 struct sk_buff **rxtx_buffer;
643 u8 *rxtx_annotations;
644 #define RXRPC_TX_ANNO_ACK 0
645 #define RXRPC_TX_ANNO_UNACK 1
646 #define RXRPC_TX_ANNO_NAK 2
647 #define RXRPC_TX_ANNO_RETRANS 3
648 #define RXRPC_TX_ANNO_MASK 0x03
649 #define RXRPC_TX_ANNO_LAST 0x04
650 #define RXRPC_TX_ANNO_RESENT 0x08
652 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */
653 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
654 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
655 * not hard-ACK'd packet follows this.
657 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
658 u16 tx_backoff; /* Delay to insert due to Tx failure */
660 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
661 * is fixed, we keep these numbers in terms of segments (ie. DATA
662 * packets) rather than bytes.
664 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
665 u8 cong_cwnd; /* Congestion window size */
666 u8 cong_extra; /* Extra to send for congestion management */
667 u8 cong_ssthresh; /* Slow-start threshold */
668 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
669 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
670 u8 cong_cumul_acks; /* Cumulative ACK count */
671 ktime_t cong_tstamp; /* Last time cwnd was changed */
673 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
674 * consumed packet follows this.
676 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
677 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
678 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
679 u8 rx_winsize; /* Size of Rx window */
680 u8 tx_winsize; /* Maximum size of Tx window */
681 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
683 spinlock_t input_lock; /* Lock for packet input to this call */
685 /* Receive-phase ACK management (ACKs we send). */
686 u8 ackr_reason; /* reason to ACK */
687 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
688 rxrpc_seq_t ackr_highest_seq; /* Higest sequence number received */
689 atomic_t ackr_nr_unacked; /* Number of unacked packets */
690 atomic_t ackr_nr_consumed; /* Number of packets needing hard ACK */
693 rxrpc_serial_t rtt_serial[4]; /* Serial number of DATA or PING sent */
694 ktime_t rtt_sent_at[4]; /* Time packet sent */
695 unsigned long rtt_avail; /* Mask of available slots in bits 0-3,
696 * Mask of pending samples in 8-11 */
697 #define RXRPC_CALL_RTT_AVAIL_MASK 0xf
698 #define RXRPC_CALL_RTT_PEND_SHIFT 8
700 /* Transmission-phase ACK management (ACKs we've received). */
701 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
702 rxrpc_seq_t acks_first_seq; /* first sequence number received */
703 rxrpc_seq_t acks_prev_seq; /* Highest previousPacket received */
704 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
705 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
706 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
707 rxrpc_serial_t acks_highest_serial; /* Highest serial number ACK'd */
711 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
713 struct rxrpc_ack_summary {
715 u8 nr_acks; /* Number of ACKs in packet */
716 u8 nr_nacks; /* Number of NACKs in packet */
717 u8 nr_new_acks; /* Number of new ACKs in packet */
718 u8 nr_new_nacks; /* Number of new NACKs in packet */
719 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
720 bool new_low_nack; /* T if new low NACK found */
721 bool retrans_timeo; /* T if reTx due to timeout happened */
722 u8 flight_size; /* Number of unreceived transmissions */
723 /* Place to stash values for tracing */
724 enum rxrpc_congest_mode mode:8;
732 * sendmsg() cmsg-specified parameters.
735 RXRPC_CMD_SEND_DATA, /* send data message */
736 RXRPC_CMD_SEND_ABORT, /* request abort generation */
737 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
738 RXRPC_CMD_CHARGE_ACCEPT, /* [server] charge accept preallocation */
741 struct rxrpc_call_params {
742 s64 tx_total_len; /* Total Tx data length (if send data) */
743 unsigned long user_call_ID; /* User's call ID */
745 u32 hard; /* Maximum lifetime (sec) */
746 u32 idle; /* Max time since last data packet (msec) */
747 u32 normal; /* Max time since last call packet (msec) */
749 u8 nr_timeouts; /* Number of timeouts specified */
750 bool kernel; /* T if kernel is making the call */
751 enum rxrpc_interruptibility interruptibility; /* How is interruptible is the call? */
754 struct rxrpc_send_params {
755 struct rxrpc_call_params call;
756 u32 abort_code; /* Abort code to Tx (if abort) */
757 enum rxrpc_command command : 8; /* The command to implement */
758 bool exclusive; /* Shared or exclusive call */
759 bool upgrade; /* If the connection is upgradeable */
762 #include <trace/events/rxrpc.h>
767 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
768 extern struct workqueue_struct *rxrpc_workqueue;
773 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
774 void rxrpc_discard_prealloc(struct rxrpc_sock *);
775 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
778 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
779 int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long);
784 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool,
785 enum rxrpc_propose_ack_trace);
786 void rxrpc_process_call(struct work_struct *);
788 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
789 unsigned long expire_at,
791 enum rxrpc_timer_trace why);
793 void rxrpc_delete_call_timer(struct rxrpc_call *call);
798 extern const char *const rxrpc_call_states[];
799 extern const char *const rxrpc_call_completions[];
800 extern struct kmem_cache *rxrpc_call_jar;
802 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
803 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
804 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
805 struct rxrpc_conn_parameters *,
806 struct sockaddr_rxrpc *,
807 struct rxrpc_call_params *, gfp_t,
809 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
811 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
812 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
813 bool __rxrpc_queue_call(struct rxrpc_call *);
814 bool rxrpc_queue_call(struct rxrpc_call *);
815 void rxrpc_see_call(struct rxrpc_call *);
816 bool rxrpc_try_get_call(struct rxrpc_call *call, enum rxrpc_call_trace op);
817 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
818 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
819 void rxrpc_cleanup_call(struct rxrpc_call *);
820 void rxrpc_destroy_all_calls(struct rxrpc_net *);
822 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
824 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
827 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
829 return !rxrpc_is_service_call(call);
835 extern unsigned int rxrpc_reap_client_connections;
836 extern unsigned long rxrpc_conn_idle_client_expiry;
837 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
838 extern struct idr rxrpc_client_conn_ids;
840 void rxrpc_destroy_client_conn_ids(void);
841 struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *);
842 void rxrpc_put_bundle(struct rxrpc_bundle *);
843 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
844 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
846 void rxrpc_expose_client_call(struct rxrpc_call *);
847 void rxrpc_disconnect_client_call(struct rxrpc_bundle *, struct rxrpc_call *);
848 void rxrpc_put_client_conn(struct rxrpc_connection *);
849 void rxrpc_discard_expired_client_conns(struct work_struct *);
850 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
851 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
856 void rxrpc_process_connection(struct work_struct *);
857 void rxrpc_process_delayed_final_acks(struct rxrpc_connection *, bool);
862 extern unsigned int rxrpc_connection_expiry;
863 extern unsigned int rxrpc_closed_conn_expiry;
865 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
866 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
868 struct rxrpc_peer **);
869 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
870 void rxrpc_disconnect_call(struct rxrpc_call *);
871 void rxrpc_kill_connection(struct rxrpc_connection *);
872 bool rxrpc_queue_conn(struct rxrpc_connection *);
873 void rxrpc_see_connection(struct rxrpc_connection *);
874 struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *);
875 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
876 void rxrpc_put_service_conn(struct rxrpc_connection *);
877 void rxrpc_service_connection_reaper(struct work_struct *);
878 void rxrpc_destroy_all_connections(struct rxrpc_net *);
880 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
882 return conn->out_clientflag;
885 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
887 return !rxrpc_conn_is_client(conn);
890 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
895 if (rxrpc_conn_is_client(conn))
896 rxrpc_put_client_conn(conn);
898 rxrpc_put_service_conn(conn);
901 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
902 unsigned long expire_at)
904 timer_reduce(&conn->timer, expire_at);
910 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
912 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
913 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
914 const struct rxrpc_security *, struct sk_buff *);
915 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
920 int rxrpc_input_packet(struct sock *, struct sk_buff *);
925 extern const struct rxrpc_security rxrpc_no_security;
930 extern struct key_type key_type_rxrpc;
932 int rxrpc_request_key(struct rxrpc_sock *, sockptr_t , int);
933 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
939 extern void rxrpc_process_local_events(struct rxrpc_local *);
944 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
945 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
946 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
947 void rxrpc_put_local(struct rxrpc_local *);
948 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
949 void rxrpc_unuse_local(struct rxrpc_local *);
950 void rxrpc_queue_local(struct rxrpc_local *);
951 void rxrpc_destroy_all_locals(struct rxrpc_net *);
953 static inline bool __rxrpc_unuse_local(struct rxrpc_local *local)
955 return atomic_dec_return(&local->active_users) == 0;
958 static inline bool __rxrpc_use_local(struct rxrpc_local *local)
960 return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0;
966 extern unsigned int rxrpc_max_backlog __read_mostly;
967 extern unsigned long rxrpc_requested_ack_delay;
968 extern unsigned long rxrpc_soft_ack_delay;
969 extern unsigned long rxrpc_idle_ack_delay;
970 extern unsigned int rxrpc_rx_window_size;
971 extern unsigned int rxrpc_rx_mtu;
972 extern unsigned int rxrpc_rx_jumbo_max;
974 extern const s8 rxrpc_ack_priority[];
979 extern unsigned int rxrpc_net_id;
980 extern struct pernet_operations rxrpc_net_ops;
982 static inline struct rxrpc_net *rxrpc_net(struct net *net)
984 return net_generic(net, rxrpc_net_id);
990 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
991 int rxrpc_send_abort_packet(struct rxrpc_call *);
992 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
993 void rxrpc_reject_packets(struct rxrpc_local *);
994 void rxrpc_send_keepalive(struct rxrpc_peer *);
999 void rxrpc_error_report(struct sock *);
1000 void rxrpc_peer_keepalive_worker(struct work_struct *);
1005 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1006 const struct sockaddr_rxrpc *);
1007 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1008 struct sockaddr_rxrpc *, gfp_t);
1009 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1010 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1011 struct rxrpc_peer *);
1012 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1013 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1014 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1015 void rxrpc_put_peer(struct rxrpc_peer *);
1016 void rxrpc_put_peer_locked(struct rxrpc_peer *);
1021 extern const struct seq_operations rxrpc_call_seq_ops;
1022 extern const struct seq_operations rxrpc_connection_seq_ops;
1023 extern const struct seq_operations rxrpc_peer_seq_ops;
1024 extern const struct seq_operations rxrpc_local_seq_ops;
1029 void rxrpc_notify_socket(struct rxrpc_call *);
1030 bool __rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1031 bool rxrpc_set_call_completion(struct rxrpc_call *, enum rxrpc_call_completion, u32, int);
1032 bool __rxrpc_call_completed(struct rxrpc_call *);
1033 bool rxrpc_call_completed(struct rxrpc_call *);
1034 bool __rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1035 bool rxrpc_abort_call(const char *, struct rxrpc_call *, rxrpc_seq_t, u32, int);
1036 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1039 * Abort a call due to a protocol error.
1041 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
1042 struct sk_buff *skb,
1043 const char *eproto_why,
1047 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
1049 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
1050 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
1053 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
1054 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
1055 (abort_why), (abort_code))
1060 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
1061 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1062 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
1063 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
1069 extern const struct rxrpc_security rxkad;
1075 int __init rxrpc_init_security(void);
1076 const struct rxrpc_security *rxrpc_security_lookup(u8);
1077 void rxrpc_exit_security(void);
1078 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1079 const struct rxrpc_security *rxrpc_get_incoming_security(struct rxrpc_sock *,
1081 struct key *rxrpc_look_up_server_security(struct rxrpc_connection *,
1082 struct sk_buff *, u32, u32);
1087 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1092 extern struct key_type key_type_rxrpc_s;
1094 int rxrpc_server_keyring(struct rxrpc_sock *, sockptr_t, int);
1099 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1100 void rxrpc_packet_destructor(struct sk_buff *);
1101 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1102 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1103 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1104 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1105 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1106 void rxrpc_purge_queue(struct sk_buff_head *);
1111 int rxrpc_stats_show(struct seq_file *seq, void *v);
1112 int rxrpc_stats_clear(struct file *file, char *buf, size_t size);
1114 #define rxrpc_inc_stat(rxnet, s) atomic_inc(&(rxnet)->s)
1115 #define rxrpc_dec_stat(rxnet, s) atomic_dec(&(rxnet)->s)
1120 #ifdef CONFIG_SYSCTL
1121 extern int __init rxrpc_sysctl_init(void);
1122 extern void rxrpc_sysctl_exit(void);
1124 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1125 static inline void rxrpc_sysctl_exit(void) {}
1131 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1133 static inline bool before(u32 seq1, u32 seq2)
1135 return (s32)(seq1 - seq2) < 0;
1137 static inline bool before_eq(u32 seq1, u32 seq2)
1139 return (s32)(seq1 - seq2) <= 0;
1141 static inline bool after(u32 seq1, u32 seq2)
1143 return (s32)(seq1 - seq2) > 0;
1145 static inline bool after_eq(u32 seq1, u32 seq2)
1147 return (s32)(seq1 - seq2) >= 0;
1153 extern unsigned int rxrpc_debug;
1155 #define dbgprintk(FMT,...) \
1156 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1158 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1159 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1160 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1161 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1162 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1165 #if defined(__KDEBUG)
1166 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1167 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1168 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1169 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1170 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1172 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1173 #define RXRPC_DEBUG_KENTER 0x01
1174 #define RXRPC_DEBUG_KLEAVE 0x02
1175 #define RXRPC_DEBUG_KDEBUG 0x04
1176 #define RXRPC_DEBUG_KPROTO 0x08
1177 #define RXRPC_DEBUG_KNET 0x10
1179 #define _enter(FMT,...) \
1181 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1182 kenter(FMT,##__VA_ARGS__); \
1185 #define _leave(FMT,...) \
1187 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1188 kleave(FMT,##__VA_ARGS__); \
1191 #define _debug(FMT,...) \
1193 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1194 kdebug(FMT,##__VA_ARGS__); \
1197 #define _proto(FMT,...) \
1199 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1200 kproto(FMT,##__VA_ARGS__); \
1203 #define _net(FMT,...) \
1205 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1206 knet(FMT,##__VA_ARGS__); \
1210 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1211 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1212 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1213 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1214 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1218 * debug assertion checking
1220 #if 1 // defined(__KDEBUGALL)
1224 if (unlikely(!(X))) { \
1225 pr_err("Assertion failed\n"); \
1230 #define ASSERTCMP(X, OP, Y) \
1232 __typeof__(X) _x = (X); \
1233 __typeof__(Y) _y = (__typeof__(X))(Y); \
1234 if (unlikely(!(_x OP _y))) { \
1235 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1236 (unsigned long)_x, (unsigned long)_x, #OP, \
1237 (unsigned long)_y, (unsigned long)_y); \
1242 #define ASSERTIF(C, X) \
1244 if (unlikely((C) && !(X))) { \
1245 pr_err("Assertion failed\n"); \
1250 #define ASSERTIFCMP(C, X, OP, Y) \
1252 __typeof__(X) _x = (X); \
1253 __typeof__(Y) _y = (__typeof__(X))(Y); \
1254 if (unlikely((C) && !(_x OP _y))) { \
1255 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1256 (unsigned long)_x, (unsigned long)_x, #OP, \
1257 (unsigned long)_y, (unsigned long)_y); \
1268 #define ASSERTCMP(X, OP, Y) \
1272 #define ASSERTIF(C, X) \
1276 #define ASSERTIFCMP(C, X, OP, Y) \
1280 #endif /* __KDEBUGALL */