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 <net/net_namespace.h>
11 #include <net/netns/generic.h>
13 #include <net/af_rxrpc.h>
17 #define CHECK_SLAB_OKAY(X) \
18 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
19 (POISON_FREE << 8 | POISON_FREE))
21 #define CHECK_SLAB_OKAY(X) do {} while (0)
24 #define FCRYPT_BSIZE 8
30 } __attribute__((aligned(8)));
32 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
33 #define rxrpc_queue_delayed_work(WS,D) \
34 queue_delayed_work(rxrpc_workqueue, (WS), (D))
36 struct rxrpc_connection;
39 * Mark applied to socket buffers in skb->mark. skb->priority is used
40 * to pass supplementary information.
43 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
48 * sk_state for RxRPC sockets
52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
53 RXRPC_CLIENT_BOUND, /* client local address bound */
54 RXRPC_SERVER_BOUND, /* server local address bound */
55 RXRPC_SERVER_BOUND2, /* second server local address bound */
56 RXRPC_SERVER_LISTENING, /* server listening for connections */
57 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
58 RXRPC_CLOSE, /* socket is being closed */
62 * Per-network namespace data.
65 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
66 u32 epoch; /* Local epoch for detecting local-end reset */
67 struct list_head calls; /* List of calls active in this namespace */
68 rwlock_t call_lock; /* Lock for ->calls */
69 atomic_t nr_calls; /* Count of allocated calls */
72 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
73 struct list_head service_conns; /* Service conns in this namespace */
74 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
75 struct work_struct service_conn_reaper;
76 struct timer_list service_conn_reap_timer;
78 unsigned int nr_client_conns;
79 unsigned int nr_active_client_conns;
80 bool kill_all_client_conns;
82 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
83 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
84 struct list_head waiting_client_conns;
85 struct list_head active_client_conns;
86 struct list_head idle_client_conns;
87 struct work_struct client_conn_reaper;
88 struct timer_list client_conn_reap_timer;
90 struct list_head local_endpoints;
91 struct mutex local_mutex; /* Lock for ->local_endpoints */
93 DECLARE_HASHTABLE (peer_hash, 10);
94 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
96 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
97 u8 peer_keepalive_cursor;
98 time64_t peer_keepalive_base;
99 struct list_head peer_keepalive[32];
100 struct list_head peer_keepalive_new;
101 struct timer_list peer_keepalive_timer;
102 struct work_struct peer_keepalive_work;
106 * Service backlog preallocation.
108 * This contains circular buffers of preallocated peers, connections and calls
109 * for incoming service calls and their head and tail pointers. This allows
110 * calls to be set up in the data_ready handler, thereby avoiding the need to
111 * shuffle packets around so much.
113 struct rxrpc_backlog {
114 unsigned short peer_backlog_head;
115 unsigned short peer_backlog_tail;
116 unsigned short conn_backlog_head;
117 unsigned short conn_backlog_tail;
118 unsigned short call_backlog_head;
119 unsigned short call_backlog_tail;
120 #define RXRPC_BACKLOG_MAX 32
121 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
122 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
123 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
127 * RxRPC socket definition
130 /* WARNING: sk has to be the first member */
132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
134 struct rxrpc_local *local; /* local endpoint */
135 struct rxrpc_backlog *backlog; /* Preallocation for services */
136 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
137 struct list_head sock_calls; /* List of calls owned by this socket */
138 struct list_head to_be_accepted; /* calls awaiting acceptance */
139 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
140 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
141 struct key *key; /* security for this socket */
142 struct key *securities; /* list of server security descriptors */
143 struct rb_root calls; /* User ID -> call mapping */
145 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
146 rwlock_t call_lock; /* lock for calls */
147 u32 min_sec_level; /* minimum security level */
148 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
149 bool exclusive; /* Exclusive connection for a client socket */
150 u16 second_service; /* Additional service bound to the endpoint */
152 /* Service upgrade information */
153 u16 from; /* Service ID to upgrade (if not 0) */
154 u16 to; /* service ID to upgrade to */
156 sa_family_t family; /* Protocol family created with */
157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
161 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
164 * CPU-byteorder normalised Rx packet header.
166 struct rxrpc_host_header {
167 u32 epoch; /* client boot timestamp */
168 u32 cid; /* connection and channel ID */
169 u32 callNumber; /* call ID (0 for connection-level packets) */
170 u32 seq; /* sequence number of pkt in call stream */
171 u32 serial; /* serial number of pkt sent to network */
172 u8 type; /* packet type */
173 u8 flags; /* packet flags */
174 u8 userStatus; /* app-layer defined status */
175 u8 securityIndex; /* security protocol ID */
177 u16 _rsvd; /* reserved */
178 u16 cksum; /* kerberos security checksum */
180 u16 serviceId; /* service ID */
184 * RxRPC socket buffer private variables
185 * - max 48 bytes (struct sk_buff::cb)
187 struct rxrpc_skb_priv {
189 u8 nr_jumbo; /* Number of jumbo subpackets */
192 int remain; /* amount of space remaining for next write */
195 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
198 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
201 * RxRPC security module interface
203 struct rxrpc_security {
204 const char *name; /* name of this service */
205 u8 security_index; /* security type provided */
207 /* Initialise a security service */
210 /* Clean up a security service */
213 /* initialise a connection's security */
214 int (*init_connection_security)(struct rxrpc_connection *);
216 /* prime a connection's packet security */
217 int (*prime_packet_security)(struct rxrpc_connection *);
219 /* impose security on a packet */
220 int (*secure_packet)(struct rxrpc_call *,
225 /* verify the security on a received packet */
226 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
227 unsigned int, unsigned int, rxrpc_seq_t, u16);
229 /* Free crypto request on a call */
230 void (*free_call_crypto)(struct rxrpc_call *);
232 /* Locate the data in a received packet that has been verified. */
233 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
234 unsigned int *, unsigned int *);
236 /* issue a challenge */
237 int (*issue_challenge)(struct rxrpc_connection *);
239 /* respond to a challenge */
240 int (*respond_to_challenge)(struct rxrpc_connection *,
244 /* verify a response */
245 int (*verify_response)(struct rxrpc_connection *,
249 /* clear connection security */
250 void (*clear)(struct rxrpc_connection *);
254 * RxRPC local transport endpoint description
255 * - owned by a single AF_RXRPC socket
256 * - pointed to by transport socket struct sk_user_data
260 atomic_t active_users; /* Number of users of the local endpoint */
261 atomic_t usage; /* Number of references to the structure */
262 struct rxrpc_net *rxnet; /* The network ns in which this resides */
263 struct list_head link;
264 struct socket *socket; /* my UDP socket */
265 struct work_struct processor;
266 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
267 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
268 struct sk_buff_head reject_queue; /* packets awaiting rejection */
269 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
270 struct rb_root client_conns; /* Client connections by socket params */
271 spinlock_t client_conns_lock; /* Lock for client_conns */
272 spinlock_t lock; /* access lock */
273 rwlock_t services_lock; /* lock for services list */
274 int debug_id; /* debug ID for printks */
276 bool service_closed; /* Service socket closed */
277 struct sockaddr_rxrpc srx; /* local address */
281 * RxRPC remote transport endpoint definition
282 * - matched by local endpoint, remote port, address and protocol type
285 struct rcu_head rcu; /* This must be first */
287 unsigned long hash_key;
288 struct hlist_node hash_link;
289 struct rxrpc_local *local;
290 struct hlist_head error_targets; /* targets for net error distribution */
291 struct rb_root service_conns; /* Service connections */
292 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
293 time64_t last_tx_at; /* Last time packet sent here */
294 seqlock_t service_conn_lock;
295 spinlock_t lock; /* access lock */
296 unsigned int if_mtu; /* interface MTU for this peer */
297 unsigned int mtu; /* network MTU for this peer */
298 unsigned int maxdata; /* data size (MTU - hdrsize) */
299 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
300 int debug_id; /* debug ID for printks */
301 struct sockaddr_rxrpc srx; /* remote address */
303 /* calculated RTT cache */
304 #define RXRPC_RTT_CACHE_SIZE 32
305 spinlock_t rtt_input_lock; /* RTT lock for input routine */
306 ktime_t rtt_last_req; /* Time of last RTT request */
307 u64 rtt; /* Current RTT estimate (in nS) */
308 u64 rtt_sum; /* Sum of cache contents */
309 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
310 u8 rtt_cursor; /* next entry at which to insert */
311 u8 rtt_usage; /* amount of cache actually used */
313 u8 cong_cwnd; /* Congestion window size */
317 * Keys for matching a connection.
319 struct rxrpc_conn_proto {
322 u32 epoch; /* epoch of this connection */
323 u32 cid; /* connection ID */
329 struct rxrpc_conn_parameters {
330 struct rxrpc_local *local; /* Representation of local endpoint */
331 struct rxrpc_peer *peer; /* Remote endpoint */
332 struct key *key; /* Security details */
333 bool exclusive; /* T if conn is exclusive */
334 bool upgrade; /* T if service ID can be upgraded */
335 u16 service_id; /* Service ID for this connection */
336 u32 security_level; /* Security level selected */
340 * Bits in the connection flags.
342 enum rxrpc_conn_flag {
343 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
344 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
345 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
346 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
347 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
348 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
349 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
350 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
351 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
352 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
353 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
356 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
357 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
358 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
359 (1UL << RXRPC_CONN_FINAL_ACK_3))
362 * Events that can be raised upon a connection.
364 enum rxrpc_conn_event {
365 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
369 * The connection cache state.
371 enum rxrpc_conn_cache_state {
372 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
373 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
374 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
375 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */
376 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
377 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
378 RXRPC_CONN__NR_CACHE_STATES
382 * The connection protocol state.
384 enum rxrpc_conn_proto_state {
385 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
386 RXRPC_CONN_CLIENT, /* Client connection */
387 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
388 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
389 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
390 RXRPC_CONN_SERVICE, /* Service secured connection */
391 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
392 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
393 RXRPC_CONN__NR_STATES
397 * RxRPC connection definition
398 * - matched by { local, peer, epoch, conn_id, direction }
399 * - each connection can only handle four simultaneous calls
401 struct rxrpc_connection {
402 struct rxrpc_conn_proto proto;
403 struct rxrpc_conn_parameters params;
407 struct list_head cache_link;
409 spinlock_t channel_lock;
410 unsigned char active_chans; /* Mask of active channels */
411 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
412 struct list_head waiting_calls; /* Calls waiting for channels */
413 struct rxrpc_channel {
414 unsigned long final_ack_at; /* Time at which to issue final ACK */
415 struct rxrpc_call __rcu *call; /* Active call */
416 unsigned int call_debug_id; /* call->debug_id */
417 u32 call_id; /* ID of current call */
418 u32 call_counter; /* Call ID counter */
419 u32 last_call; /* ID of last call */
420 u8 last_type; /* Type of last packet */
425 } channels[RXRPC_MAXCALLS];
427 struct timer_list timer; /* Conn event timer */
428 struct work_struct processor; /* connection event processor */
430 struct rb_node client_node; /* Node in local->client_conns */
431 struct rb_node service_node; /* Node in peer->service_conns */
433 struct list_head proc_link; /* link in procfs list */
434 struct list_head link; /* link in master connection list */
435 struct sk_buff_head rx_queue; /* received conn-level packets */
436 const struct rxrpc_security *security; /* applied security module */
437 struct key *server_key; /* security for this service */
438 struct crypto_sync_skcipher *cipher; /* encryption handle */
439 struct rxrpc_crypt csum_iv; /* packet checksum base */
441 unsigned long events;
442 unsigned long idle_timestamp; /* Time at which last became idle */
443 spinlock_t state_lock; /* state-change lock */
444 enum rxrpc_conn_cache_state cache_state;
445 enum rxrpc_conn_proto_state state; /* current state of connection */
446 u32 abort_code; /* Abort code of connection abort */
447 int debug_id; /* debug ID for printks */
448 atomic_t serial; /* packet serial number counter */
449 unsigned int hi_serial; /* highest serial number received */
450 u32 security_nonce; /* response re-use preventer */
451 u32 service_id; /* Service ID, possibly upgraded */
452 u8 size_align; /* data size alignment (for security) */
453 u8 security_size; /* security header size */
454 u8 security_ix; /* security type */
455 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
456 short error; /* Local error code */
459 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
461 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
464 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
466 return !rxrpc_to_server(sp);
470 * Flags in call->flags.
472 enum rxrpc_call_flag {
473 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
474 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
475 RXRPC_CALL_IS_SERVICE, /* Call is service call */
476 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
477 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
478 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
479 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
480 RXRPC_CALL_PINGING, /* Ping in process */
481 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
482 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
483 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
484 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
485 RXRPC_CALL_IS_INTR, /* The call is interruptible */
489 * Events that can be raised on a call.
491 enum rxrpc_call_event {
492 RXRPC_CALL_EV_ACK, /* need to generate ACK */
493 RXRPC_CALL_EV_ABORT, /* need to generate abort */
494 RXRPC_CALL_EV_RESEND, /* Tx resend required */
495 RXRPC_CALL_EV_PING, /* Ping send required */
496 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
497 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
501 * The states that a call can be in.
503 enum rxrpc_call_state {
504 RXRPC_CALL_UNINITIALISED,
505 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
506 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
507 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
508 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
509 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
510 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
511 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
512 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
513 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
514 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
515 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
516 RXRPC_CALL_COMPLETE, /* - call complete */
517 NR__RXRPC_CALL_STATES
521 * Call completion condition (state == RXRPC_CALL_COMPLETE).
523 enum rxrpc_call_completion {
524 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
525 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
526 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
527 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
528 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
529 NR__RXRPC_CALL_COMPLETIONS
533 * Call Tx congestion management modes.
535 enum rxrpc_congest_mode {
536 RXRPC_CALL_SLOW_START,
537 RXRPC_CALL_CONGEST_AVOIDANCE,
538 RXRPC_CALL_PACKET_LOSS,
539 RXRPC_CALL_FAST_RETRANSMIT,
540 NR__RXRPC_CONGEST_MODES
544 * RxRPC call definition
545 * - matched by { connection, call_id }
549 struct rxrpc_connection *conn; /* connection carrying call */
550 struct rxrpc_peer *peer; /* Peer record for remote address */
551 struct rxrpc_sock __rcu *socket; /* socket responsible */
552 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
553 struct mutex user_mutex; /* User access mutex */
554 unsigned long ack_at; /* When deferred ACK needs to happen */
555 unsigned long ack_lost_at; /* When ACK is figured as lost */
556 unsigned long resend_at; /* When next resend needs to happen */
557 unsigned long ping_at; /* When next to send a ping */
558 unsigned long keepalive_at; /* When next to send a keepalive ping */
559 unsigned long expect_rx_by; /* When we expect to get a packet by */
560 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
561 unsigned long expect_term_by; /* When we expect call termination by */
562 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
563 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
564 struct skcipher_request *cipher_req; /* Packet cipher request buffer */
565 struct timer_list timer; /* Combined event timer */
566 struct work_struct processor; /* Event processor */
567 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
568 struct list_head link; /* link in master call list */
569 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
570 struct hlist_node error_link; /* link in error distribution list */
571 struct list_head accept_link; /* Link in rx->acceptq */
572 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
573 struct list_head sock_link; /* Link in rx->sock_calls */
574 struct rb_node sock_node; /* Node in rx->calls */
575 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
576 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
577 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
578 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
579 unsigned long user_call_ID; /* user-defined call ID */
581 unsigned long events;
583 spinlock_t notify_lock; /* Kernel notification lock */
584 rwlock_t state_lock; /* lock for state transition */
585 u32 abort_code; /* Local/remote abort code */
586 int error; /* Local error incurred */
587 enum rxrpc_call_state state; /* current state of call */
588 enum rxrpc_call_completion completion; /* Call completion condition */
590 u16 service_id; /* service ID */
591 u8 security_ix; /* Security type */
592 u32 call_id; /* call ID on connection */
593 u32 cid; /* connection ID plus channel index */
594 int debug_id; /* debug ID for printks */
595 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
596 unsigned short rx_pkt_len; /* Current recvmsg packet len */
598 /* Rx/Tx circular buffer, depending on phase.
600 * In the Rx phase, packets are annotated with 0 or the number of the
601 * segment of a jumbo packet each buffer refers to. There can be up to
602 * 47 segments in a maximum-size UDP packet.
604 * In the Tx phase, packets are annotated with which buffers have been
607 #define RXRPC_RXTX_BUFF_SIZE 64
608 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
609 #define RXRPC_INIT_RX_WINDOW_SIZE 63
610 struct sk_buff **rxtx_buffer;
611 u8 *rxtx_annotations;
612 #define RXRPC_TX_ANNO_ACK 0
613 #define RXRPC_TX_ANNO_UNACK 1
614 #define RXRPC_TX_ANNO_NAK 2
615 #define RXRPC_TX_ANNO_RETRANS 3
616 #define RXRPC_TX_ANNO_MASK 0x03
617 #define RXRPC_TX_ANNO_LAST 0x04
618 #define RXRPC_TX_ANNO_RESENT 0x08
620 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
621 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
622 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
623 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
624 * not hard-ACK'd packet follows this.
626 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
627 u16 tx_backoff; /* Delay to insert due to Tx failure */
629 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
630 * is fixed, we keep these numbers in terms of segments (ie. DATA
631 * packets) rather than bytes.
633 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
634 u8 cong_cwnd; /* Congestion window size */
635 u8 cong_extra; /* Extra to send for congestion management */
636 u8 cong_ssthresh; /* Slow-start threshold */
637 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
638 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
639 u8 cong_cumul_acks; /* Cumulative ACK count */
640 ktime_t cong_tstamp; /* Last time cwnd was changed */
642 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
643 * consumed packet follows this.
645 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
646 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
647 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
648 u8 rx_winsize; /* Size of Rx window */
649 u8 tx_winsize; /* Maximum size of Tx window */
650 bool tx_phase; /* T if transmission phase, F if receive phase */
651 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
653 spinlock_t input_lock; /* Lock for packet input to this call */
655 /* receive-phase ACK management */
656 u8 ackr_reason; /* reason to ACK */
657 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
658 rxrpc_serial_t ackr_first_seq; /* first sequence number received */
659 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
660 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
661 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
663 /* ping management */
664 rxrpc_serial_t ping_serial; /* Last ping sent */
665 ktime_t ping_time; /* Time last ping sent */
667 /* transmission-phase ACK management */
668 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
669 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
670 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
671 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
672 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
676 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
678 struct rxrpc_ack_summary {
680 u8 nr_acks; /* Number of ACKs in packet */
681 u8 nr_nacks; /* Number of NACKs in packet */
682 u8 nr_new_acks; /* Number of new ACKs in packet */
683 u8 nr_new_nacks; /* Number of new NACKs in packet */
684 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
685 bool new_low_nack; /* T if new low NACK found */
686 bool retrans_timeo; /* T if reTx due to timeout happened */
687 u8 flight_size; /* Number of unreceived transmissions */
688 /* Place to stash values for tracing */
689 enum rxrpc_congest_mode mode:8;
697 * sendmsg() cmsg-specified parameters.
700 RXRPC_CMD_SEND_DATA, /* send data message */
701 RXRPC_CMD_SEND_ABORT, /* request abort generation */
702 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
703 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
706 struct rxrpc_call_params {
707 s64 tx_total_len; /* Total Tx data length (if send data) */
708 unsigned long user_call_ID; /* User's call ID */
710 u32 hard; /* Maximum lifetime (sec) */
711 u32 idle; /* Max time since last data packet (msec) */
712 u32 normal; /* Max time since last call packet (msec) */
714 u8 nr_timeouts; /* Number of timeouts specified */
715 bool intr; /* The call is interruptible */
718 struct rxrpc_send_params {
719 struct rxrpc_call_params call;
720 u32 abort_code; /* Abort code to Tx (if abort) */
721 enum rxrpc_command command : 8; /* The command to implement */
722 bool exclusive; /* Shared or exclusive call */
723 bool upgrade; /* If the connection is upgradeable */
726 #include <trace/events/rxrpc.h>
731 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
732 extern struct workqueue_struct *rxrpc_workqueue;
737 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
738 void rxrpc_discard_prealloc(struct rxrpc_sock *);
739 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
742 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
743 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
745 int rxrpc_reject_call(struct rxrpc_sock *);
750 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool,
751 enum rxrpc_propose_ack_trace);
752 void rxrpc_process_call(struct work_struct *);
754 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
755 unsigned long expire_at,
757 enum rxrpc_timer_trace why)
759 trace_rxrpc_timer(call, why, now);
760 timer_reduce(&call->timer, expire_at);
766 extern const char *const rxrpc_call_states[];
767 extern const char *const rxrpc_call_completions[];
768 extern unsigned int rxrpc_max_call_lifetime;
769 extern struct kmem_cache *rxrpc_call_jar;
771 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
772 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
773 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
774 struct rxrpc_conn_parameters *,
775 struct sockaddr_rxrpc *,
776 struct rxrpc_call_params *, gfp_t,
778 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
780 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
781 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
782 bool __rxrpc_queue_call(struct rxrpc_call *);
783 bool rxrpc_queue_call(struct rxrpc_call *);
784 void rxrpc_see_call(struct rxrpc_call *);
785 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
786 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
787 void rxrpc_cleanup_call(struct rxrpc_call *);
788 void rxrpc_destroy_all_calls(struct rxrpc_net *);
790 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
792 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
795 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
797 return !rxrpc_is_service_call(call);
801 * Transition a call to the complete state.
803 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
804 enum rxrpc_call_completion compl,
808 if (call->state < RXRPC_CALL_COMPLETE) {
809 call->abort_code = abort_code;
811 call->completion = compl,
812 call->state = RXRPC_CALL_COMPLETE;
813 trace_rxrpc_call_complete(call);
814 wake_up(&call->waitq);
820 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
821 enum rxrpc_call_completion compl,
827 write_lock_bh(&call->state_lock);
828 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
829 write_unlock_bh(&call->state_lock);
834 * Record that a call successfully completed.
836 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
838 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
841 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
845 write_lock_bh(&call->state_lock);
846 ret = __rxrpc_call_completed(call);
847 write_unlock_bh(&call->state_lock);
852 * Record that a call is locally aborted.
854 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
856 u32 abort_code, int error)
858 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
860 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
864 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
865 rxrpc_seq_t seq, u32 abort_code, int error)
869 write_lock_bh(&call->state_lock);
870 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
871 write_unlock_bh(&call->state_lock);
876 * Abort a call due to a protocol error.
878 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
880 const char *eproto_why,
884 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
886 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
887 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
890 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
891 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
892 (abort_why), (abort_code))
897 extern unsigned int rxrpc_max_client_connections;
898 extern unsigned int rxrpc_reap_client_connections;
899 extern unsigned long rxrpc_conn_idle_client_expiry;
900 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
901 extern struct idr rxrpc_client_conn_ids;
903 void rxrpc_destroy_client_conn_ids(void);
904 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
905 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
907 void rxrpc_expose_client_call(struct rxrpc_call *);
908 void rxrpc_disconnect_client_call(struct rxrpc_call *);
909 void rxrpc_put_client_conn(struct rxrpc_connection *);
910 void rxrpc_discard_expired_client_conns(struct work_struct *);
911 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
916 void rxrpc_process_connection(struct work_struct *);
921 extern unsigned int rxrpc_connection_expiry;
922 extern unsigned int rxrpc_closed_conn_expiry;
924 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
925 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
927 struct rxrpc_peer **);
928 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
929 void rxrpc_disconnect_call(struct rxrpc_call *);
930 void rxrpc_kill_connection(struct rxrpc_connection *);
931 bool rxrpc_queue_conn(struct rxrpc_connection *);
932 void rxrpc_see_connection(struct rxrpc_connection *);
933 void rxrpc_get_connection(struct rxrpc_connection *);
934 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
935 void rxrpc_put_service_conn(struct rxrpc_connection *);
936 void rxrpc_service_connection_reaper(struct work_struct *);
937 void rxrpc_destroy_all_connections(struct rxrpc_net *);
939 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
941 return conn->out_clientflag;
944 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
946 return !rxrpc_conn_is_client(conn);
949 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
954 if (rxrpc_conn_is_client(conn))
955 rxrpc_put_client_conn(conn);
957 rxrpc_put_service_conn(conn);
960 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
961 unsigned long expire_at)
963 timer_reduce(&conn->timer, expire_at);
969 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
971 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
972 void rxrpc_new_incoming_connection(struct rxrpc_sock *,
973 struct rxrpc_connection *, struct sk_buff *);
974 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
979 int rxrpc_input_packet(struct sock *, struct sk_buff *);
984 extern const struct rxrpc_security rxrpc_no_security;
989 extern struct key_type key_type_rxrpc;
990 extern struct key_type key_type_rxrpc_s;
992 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
993 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
994 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
1000 extern void rxrpc_process_local_events(struct rxrpc_local *);
1005 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1006 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
1007 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
1008 void rxrpc_put_local(struct rxrpc_local *);
1009 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
1010 void rxrpc_unuse_local(struct rxrpc_local *);
1011 void rxrpc_queue_local(struct rxrpc_local *);
1012 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1017 extern unsigned int rxrpc_max_backlog __read_mostly;
1018 extern unsigned long rxrpc_requested_ack_delay;
1019 extern unsigned long rxrpc_soft_ack_delay;
1020 extern unsigned long rxrpc_idle_ack_delay;
1021 extern unsigned int rxrpc_rx_window_size;
1022 extern unsigned int rxrpc_rx_mtu;
1023 extern unsigned int rxrpc_rx_jumbo_max;
1024 extern unsigned long rxrpc_resend_timeout;
1026 extern const s8 rxrpc_ack_priority[];
1031 extern unsigned int rxrpc_net_id;
1032 extern struct pernet_operations rxrpc_net_ops;
1034 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1036 return net_generic(net, rxrpc_net_id);
1042 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1043 int rxrpc_send_abort_packet(struct rxrpc_call *);
1044 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1045 void rxrpc_reject_packets(struct rxrpc_local *);
1046 void rxrpc_send_keepalive(struct rxrpc_peer *);
1051 void rxrpc_error_report(struct sock *);
1052 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1053 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1054 void rxrpc_peer_keepalive_worker(struct work_struct *);
1059 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1060 const struct sockaddr_rxrpc *);
1061 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1062 struct sockaddr_rxrpc *, gfp_t);
1063 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1064 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1065 struct rxrpc_peer *);
1066 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1067 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1068 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1069 void rxrpc_put_peer(struct rxrpc_peer *);
1070 void rxrpc_put_peer_locked(struct rxrpc_peer *);
1075 extern const struct seq_operations rxrpc_call_seq_ops;
1076 extern const struct seq_operations rxrpc_connection_seq_ops;
1077 extern const struct seq_operations rxrpc_peer_seq_ops;
1082 void rxrpc_notify_socket(struct rxrpc_call *);
1083 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1089 extern const struct rxrpc_security rxkad;
1095 int __init rxrpc_init_security(void);
1096 void rxrpc_exit_security(void);
1097 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1098 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1103 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1108 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1109 void rxrpc_packet_destructor(struct sk_buff *);
1110 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1111 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1112 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1113 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1114 void rxrpc_purge_queue(struct sk_buff_head *);
1119 #ifdef CONFIG_SYSCTL
1120 extern int __init rxrpc_sysctl_init(void);
1121 extern void rxrpc_sysctl_exit(void);
1123 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1124 static inline void rxrpc_sysctl_exit(void) {}
1130 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1132 static inline bool before(u32 seq1, u32 seq2)
1134 return (s32)(seq1 - seq2) < 0;
1136 static inline bool before_eq(u32 seq1, u32 seq2)
1138 return (s32)(seq1 - seq2) <= 0;
1140 static inline bool after(u32 seq1, u32 seq2)
1142 return (s32)(seq1 - seq2) > 0;
1144 static inline bool after_eq(u32 seq1, u32 seq2)
1146 return (s32)(seq1 - seq2) >= 0;
1152 extern unsigned int rxrpc_debug;
1154 #define dbgprintk(FMT,...) \
1155 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1157 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1158 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1159 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1160 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1161 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1164 #if defined(__KDEBUG)
1165 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1166 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1167 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1168 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1169 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1171 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1172 #define RXRPC_DEBUG_KENTER 0x01
1173 #define RXRPC_DEBUG_KLEAVE 0x02
1174 #define RXRPC_DEBUG_KDEBUG 0x04
1175 #define RXRPC_DEBUG_KPROTO 0x08
1176 #define RXRPC_DEBUG_KNET 0x10
1178 #define _enter(FMT,...) \
1180 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1181 kenter(FMT,##__VA_ARGS__); \
1184 #define _leave(FMT,...) \
1186 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1187 kleave(FMT,##__VA_ARGS__); \
1190 #define _debug(FMT,...) \
1192 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1193 kdebug(FMT,##__VA_ARGS__); \
1196 #define _proto(FMT,...) \
1198 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1199 kproto(FMT,##__VA_ARGS__); \
1202 #define _net(FMT,...) \
1204 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1205 knet(FMT,##__VA_ARGS__); \
1209 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1210 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1211 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1212 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1213 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1217 * debug assertion checking
1219 #if 1 // defined(__KDEBUGALL)
1223 if (unlikely(!(X))) { \
1224 pr_err("Assertion failed\n"); \
1229 #define ASSERTCMP(X, OP, Y) \
1231 __typeof__(X) _x = (X); \
1232 __typeof__(Y) _y = (__typeof__(X))(Y); \
1233 if (unlikely(!(_x OP _y))) { \
1234 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1235 (unsigned long)_x, (unsigned long)_x, #OP, \
1236 (unsigned long)_y, (unsigned long)_y); \
1241 #define ASSERTIF(C, X) \
1243 if (unlikely((C) && !(X))) { \
1244 pr_err("Assertion failed\n"); \
1249 #define ASSERTIFCMP(C, X, OP, Y) \
1251 __typeof__(X) _x = (X); \
1252 __typeof__(Y) _y = (__typeof__(X))(Y); \
1253 if (unlikely((C) && !(_x OP _y))) { \
1254 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1255 (unsigned long)_x, (unsigned long)_x, #OP, \
1256 (unsigned long)_y, (unsigned long)_y); \
1267 #define ASSERTCMP(X, OP, Y) \
1271 #define ASSERTIF(C, X) \
1275 #define ASSERTIFCMP(C, X, OP, Y) \
1279 #endif /* __KDEBUGALL */