1 /*
2  * This file contains definitions imported from the OFED rds header rds.h.
3  * Oracle elects to have and use the contents of rds.h under and
4  * governed by the OpenIB.org BSD license.
5  */
6 
7 /*
8  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
9  */
10 
11 #ifndef _RDSV3_RDSV3_H
12 #define	_RDSV3_RDSV3_H
13 
14 /*
15  * The name of this file is rds.h in ofed.
16  */
17 
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21 
22 #include <sys/sunndi.h>
23 #include <netinet/in.h>
24 #include <sys/synch.h>
25 #include <sys/stropts.h>
26 #include <sys/socket.h>
27 #include <sys/socketvar.h>
28 #include <inet/ip.h>
29 #include <sys/avl.h>
30 #include <sys/param.h>
31 #include <sys/time.h>
32 #include <sys/rds.h>
33 
34 #include <sys/ib/ibtl/ibti.h>
35 #include <sys/ib/clients/of/rdma/ib_verbs.h>
36 #include <sys/ib/clients/of/rdma/ib_addr.h>
37 #include <sys/ib/clients/of/rdma/rdma_cm.h>
38 #include <sys/ib/clients/rdsv3/rdsv3_impl.h>
39 #include <sys/ib/clients/rdsv3/info.h>
40 
41 #include <sys/cpuvar.h>
42 #include <sys/disp.h>
43 
44 #define	NIPQUAD(addr)					\
45 	(unsigned char)((ntohl(addr) >> 24) & 0xFF),	\
46 	(unsigned char)((ntohl(addr) >> 16) & 0xFF),	\
47 	(unsigned char)((ntohl(addr) >>  8) & 0xFF),	\
48 	(unsigned char)(ntohl(addr) & 0xFF)
49 
50 /*
51  * RDS Network protocol version
52  */
53 #define	RDS_PROTOCOL_3_0	0x0300
54 #define	RDS_PROTOCOL_3_1	0x0301
55 #define	RDS_PROTOCOL_VERSION	RDS_PROTOCOL_3_1
56 #define	RDS_PROTOCOL_MAJOR(v)	((v) >> 8)
57 #define	RDS_PROTOCOL_MINOR(v)	((v) & 255)
58 #define	RDS_PROTOCOL(maj, min)	(((maj) << 8) | min)
59 
60 /*
61  * XXX randomly chosen, but at least seems to be unused:
62  * #               18464-18768 Unassigned
63  * We should do better.  We want a reserved port to discourage unpriv'ed
64  * userspace from listening.
65  *
66  * port 18633 was the version that had ack frames on the wire.
67  */
68 #define	RDSV3_PORT	18634
69 
70 #define	RDSV3_REAPER_WAIT_SECS		(5*60)
71 #define	RDSV3_REAPER_WAIT_JIFFIES	SEC_TO_TICK(RDSV3_REAPER_WAIT_SECS)
72 
73 static inline ulong_t
ceil(ulong_t x,ulong_t y)74 ceil(ulong_t x, ulong_t y)
75 {
76 	return ((x + y - 1) / y);
77 }
78 
79 #define	RDSV3_FRAG_SHIFT	12
80 #define	RDSV3_FRAG_SIZE	((unsigned int)(1 << RDSV3_FRAG_SHIFT))
81 
82 #define	RDSV3_CONG_MAP_BYTES	(65536 / 8)
83 #define	RDSV3_CONG_MAP_LONGS	(RDSV3_CONG_MAP_BYTES / sizeof (unsigned long))
84 #define	RDSV3_CONG_MAP_PAGES	(RDSV3_CONG_MAP_BYTES / PAGE_SIZE)
85 #define	RDSV3_CONG_MAP_PAGE_BITS	(PAGE_SIZE * 8)
86 
87 struct rdsv3_cong_map {
88 	struct avl_node		m_rb_node;
89 	uint32_be_t		m_addr;
90 	rdsv3_wait_queue_t	m_waitq;
91 	struct list		m_conn_list;
92 	unsigned long		m_page_addrs[RDSV3_CONG_MAP_PAGES];
93 };
94 
95 /*
96  * This is how we will track the connection state:
97  * A connection is always in one of the following
98  * states. Updates to the state are atomic and imply
99  * a memory barrier.
100  */
101 enum {
102 	RDSV3_CONN_DOWN = 0,
103 	RDSV3_CONN_CONNECTING,
104 	RDSV3_CONN_DISCONNECTING,
105 	RDSV3_CONN_UP,
106 	RDSV3_CONN_ERROR,
107 };
108 
109 /* Bits for c_flags */
110 #define	RDSV3_LL_SEND_FULL	0
111 #define	RDSV3_RECONNECT_PENDING	1
112 
113 struct rdsv3_connection {
114 	struct avl_node		c_hash_node;
115 	struct rdsv3_ip_bucket	*c_bucketp;
116 	uint32_be_t		c_laddr;
117 	uint32_be_t		c_faddr;
118 	unsigned int		c_loopback:1;
119 	struct rdsv3_connection	*c_passive;
120 
121 	struct rdsv3_cong_map	*c_lcong;
122 	struct rdsv3_cong_map	*c_fcong;
123 
124 	struct mutex		c_send_lock;    /* protect send ring */
125 	atomic_t		c_send_generation;
126 	atomic_t		c_senders;
127 
128 	struct rdsv3_message	*c_xmit_rm;
129 	unsigned long		c_xmit_sg;
130 	unsigned int		c_xmit_hdr_off;
131 	unsigned int		c_xmit_data_off;
132 	unsigned int		c_xmit_rdma_sent;
133 
134 	kmutex_t		c_lock;		/* protect msg queues */
135 	uint64_t		c_next_tx_seq;
136 	struct list		c_send_queue;
137 	struct list		c_retrans;
138 
139 	uint64_t		c_next_rx_seq;
140 
141 	struct rdsv3_transport	*c_trans;
142 	void			*c_transport_data;
143 
144 	atomic_t		c_state;
145 	unsigned long		c_flags;
146 	unsigned long		c_reconnect_jiffies;
147 	clock_t			c_last_connect_jiffies;
148 
149 	struct rdsv3_delayed_work_s	c_send_w;
150 	struct rdsv3_delayed_work_s	c_recv_w;
151 	struct rdsv3_delayed_work_s	c_conn_w;
152 	struct rdsv3_delayed_work_s	c_reap_w;
153 	struct rdsv3_work_s	c_down_w;
154 	struct mutex		c_cm_lock;	/* protect conn state & cm */
155 
156 	struct list_node	c_map_item;
157 	unsigned long		c_map_queued;
158 	unsigned long		c_map_offset;
159 	unsigned long		c_map_bytes;
160 
161 	unsigned int		c_unacked_packets;
162 	unsigned int		c_unacked_bytes;
163 
164 	/* Protocol version */
165 	unsigned int		c_version;
166 };
167 
168 #define	RDSV3_FLAG_CONG_BITMAP		0x01
169 #define	RDSV3_FLAG_ACK_REQUIRED		0x02
170 #define	RDSV3_FLAG_RETRANSMITTED	0x04
171 #define	RDSV3_MAX_ADV_CREDIT		127
172 
173 /*
174  * Maximum space available for extension headers.
175  */
176 #define	RDSV3_HEADER_EXT_SPACE    16
177 
178 struct rdsv3_header {
179 	uint64_be_t	h_sequence;
180 	uint64_be_t	h_ack;
181 	uint32_be_t	h_len;
182 	uint16_be_t	h_sport;
183 	uint16_be_t	h_dport;
184 	uint8_t		h_flags;
185 	uint8_t		h_credit;
186 	uint8_t		h_padding[4];
187 	uint16_be_t	h_csum;
188 
189 	uint8_t		h_exthdr[RDSV3_HEADER_EXT_SPACE];
190 };
191 
192 /* Reserved - indicates end of extensions */
193 #define	RDSV3_EXTHDR_NONE		0
194 
195 /*
196  * This extension header is included in the very
197  * first message that is sent on a new connection,
198  * and identifies the protocol level. This will help
199  * rolling updates if a future change requires breaking
200  * the protocol.
201  */
202 #define	RDSV3_EXTHDR_VERSION	1
203 struct rdsv3_ext_header_version {
204 	uint32_be_t	h_version;
205 };
206 
207 /*
208  * This extension header is included in the RDS message
209  * chasing an RDMA operation.
210  */
211 #define	RDSV3_EXTHDR_RDMA		2
212 struct rdsv3_ext_header_rdma {
213 	uint32_be_t	h_rdma_rkey;
214 };
215 
216 /*
217  * This extension header tells the peer about the
218  * destination <R_Key,offset> of the requested RDMA
219  * operation.
220  */
221 #define	RDSV3_EXTHDR_RDMA_DEST    3
222 struct rdsv3_ext_header_rdma_dest {
223 	uint32_be_t		h_rdma_rkey;
224 	uint32_be_t		h_rdma_offset;
225 };
226 
227 #define	__RDSV3_EXTHDR_MAX	16 /* for now */
228 
229 struct rdsv3_incoming {
230 	atomic_t		i_refcount;
231 	struct list_node	i_item;
232 	struct rdsv3_connection	*i_conn;
233 	struct rdsv3_header	i_hdr;
234 	unsigned long		i_rx_jiffies;
235 	uint32_be_t		i_saddr;
236 
237 	rds_rdma_cookie_t	i_rdma_cookie;
238 };
239 
240 /*
241  * m_sock_item and m_conn_item are on lists that are serialized under
242  * conn->c_lock.  m_sock_item has additional meaning in that once it is empty
243  * the message will not be put back on the retransmit list after being sent.
244  * messages that are canceled while being sent rely on this.
245  *
246  * m_inc is used by loopback so that it can pass an incoming message straight
247  * back up into the rx path.  It embeds a wire header which is also used by
248  * the send path, which is kind of awkward.
249  *
250  * m_sock_item indicates the message's presence on a socket's send or receive
251  * queue.  m_rs will point to that socket.
252  *
253  * m_daddr is used by cancellation to prune messages to a given destination.
254  *
255  * The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock
256  * nesting.  As paths iterate over messages on a sock, or conn, they must
257  * also lock the conn, or sock, to remove the message from those lists too.
258  * Testing the flag to determine if the message is still on the lists lets
259  * us avoid testing the list_head directly.  That means each path can use
260  * the message's list_head to keep it on a local list while juggling locks
261  * without confusing the other path.
262  *
263  * m_ack_seq is an optional field set by transports who need a different
264  * sequence number range to invalidate.  They can use this in a callback
265  * that they pass to rdsv3_send_drop_acked() to see if each message has been
266  * acked.  The HAS_ACK_SEQ flag can be used to detect messages which haven't
267  * had ack_seq set yet.
268  */
269 #define	RDSV3_MSG_ON_SOCK		1
270 #define	RDSV3_MSG_ON_CONN		2
271 #define	RDSV3_MSG_HAS_ACK_SEQ		3
272 #define	RDSV3_MSG_ACK_REQUIRED		4
273 #define	RDSV3_MSG_RETRANSMITTED		5
274 #define	RDSV3_MSG_MAPPED		6
275 #define	RDSV3_MSG_PAGEVEC		7
276 
277 struct rdsv3_message {
278 	atomic_t		m_refcount;
279 	struct list_node	m_sock_item;
280 	struct list_node	m_conn_item;
281 	struct rdsv3_incoming	m_inc;
282 	uint64_t		m_ack_seq;
283 	uint32_be_t		m_daddr;
284 	unsigned long		m_flags;
285 
286 	/*
287 	 * Never access m_rs without holding m_rs_lock.
288 	 * Lock nesting is
289 	 *  rm->m_rs_lock
290 	 *   -> rs->rs_lock
291 	 */
292 	kmutex_t		m_rs_lock;
293 	rdsv3_wait_queue_t	m_flush_wait;
294 
295 	struct rdsv3_sock	*m_rs;
296 	struct rdsv3_rdma_op	*m_rdma_op;
297 	rds_rdma_cookie_t	m_rdma_cookie;
298 	struct rdsv3_mr		*m_rdma_mr;
299 	unsigned int		m_nents;
300 	unsigned int		m_count;
301 	struct rdsv3_scatterlist	m_sg[1];
302 };
303 
304 /*
305  * The RDS notifier is used (optionally) to tell the application about
306  * completed RDMA operations. Rather than keeping the whole rds message
307  * around on the queue, we allocate a small notifier that is put on the
308  * socket's notifier_list. Notifications are delivered to the application
309  * through control messages.
310  */
311 struct rdsv3_notifier {
312 	list_node_t	n_list;
313 	uint64_t	n_user_token;
314 	int		n_status;
315 };
316 
317 /*
318  * struct rdsv3_transport -  transport specific behavioural hooks
319  *
320  * @xmit: .xmit is called by rdsv3_send_xmit() to tell the transport to send
321  *	  part of a message.  The caller serializes on the send_sem so this
322  *	  doesn't need to be reentrant for a given conn.  The header must be
323  *	  sent before the data payload.  .xmit must be prepared to send a
324  *	  message with no data payload.  .xmit should return the number of
325  *	  bytes that were sent down the connection, including header bytes.
326  *	  Returning 0 tells the caller that it doesn't need to perform any
327  *	  additional work now.  This is usually the case when the transport has
328  *	  filled the sending queue for its connection and will handle
329  *	  triggering the rds thread to continue the send when space becomes
330  *	  available.  Returning -EAGAIN tells the caller to retry the send
331  *	  immediately.  Returning -ENOMEM tells the caller to retry the send at
332  *	  some point in the future.
333  *
334  * @conn_shutdown: conn_shutdown stops traffic on the given connection.  Once
335  *		   it returns the connection can not call rdsv3_recv_incoming().
336  *		   This will only be called once after conn_connect returns
337  *		   non-zero success and will The caller serializes this with
338  *		   the send and connecting paths (xmit_* and conn_*).  The
339  *		   transport is responsible for other serialization, including
340  *		   rdsv3_recv_incoming().  This is called in process context but
341  *		   should try hard not to block.
342  *
343  * @xmit_cong_map: This asks the transport to send the local bitmap down the
344  *		   given connection.  XXX get a better story about the bitmap
345  *		   flag and header.
346  */
347 
348 #define	RDS_TRANS_IB    0
349 #define	RDS_TRANS_IWARP 1
350 #define	RDS_TRANS_TCP   2
351 #define	RDS_TRANS_COUNT 3
352 
353 struct rdsv3_transport {
354 	char			t_name[TRANSNAMSIZ];
355 	struct list_node	t_item;
356 	unsigned int		t_type;
357 	unsigned int		t_prefer_loopback:1;
358 
359 	int (*laddr_check)(uint32_be_t addr);
360 	int (*conn_alloc)(struct rdsv3_connection *conn, int gfp);
361 	void (*conn_free)(void *data);
362 	int (*conn_connect)(struct rdsv3_connection *conn);
363 	void (*conn_shutdown)(struct rdsv3_connection *conn);
364 	void (*xmit_prepare)(struct rdsv3_connection *conn);
365 	void (*xmit_complete)(struct rdsv3_connection *conn);
366 	int (*xmit)(struct rdsv3_connection *conn, struct rdsv3_message *rm,
367 	    unsigned int hdr_off, unsigned int sg, unsigned int off);
368 	int (*xmit_cong_map)(struct rdsv3_connection *conn,
369 	    struct rdsv3_cong_map *map, unsigned long offset);
370 	int (*xmit_rdma)(struct rdsv3_connection *conn,
371 	    struct rdsv3_rdma_op *op);
372 	int (*recv)(struct rdsv3_connection *conn);
373 	int (*inc_copy_to_user)(struct rdsv3_incoming *inc, uio_t *uio,
374 	    size_t size);
375 	void (*inc_free)(struct rdsv3_incoming *inc);
376 
377 	int (*cm_handle_connect)(struct rdma_cm_id *cm_id,
378 	    struct rdma_cm_event *event);
379 	int (*cm_initiate_connect)(struct rdma_cm_id *cm_id);
380 	void (*cm_connect_complete)(struct rdsv3_connection *conn,
381 	    struct rdma_cm_event *event);
382 
383 	unsigned int (*stats_info_copy)(struct rdsv3_info_iterator *iter,
384 	    unsigned int avail);
385 	void (*exit)(void);
386 	void *(*get_mr)(struct rds_iovec *sg, unsigned long nr_sg,
387 	    struct rdsv3_sock *rs, uint32_t *key_ret);
388 	void (*sync_mr)(void *trans_private, int direction);
389 	void (*free_mr)(void *trans_private, int invalidate);
390 	void (*flush_mrs)(void);
391 };
392 
393 struct rdsv3_sock {
394 	struct rsock		*rs_sk;
395 	uint64_t		rs_user_addr;
396 	uint64_t		rs_user_bytes;
397 
398 	/*
399 	 * bound_addr used for both incoming and outgoing, no INADDR_ANY
400 	 * support.
401 	 */
402 	struct avl_node		rs_bound_node;
403 	uint32_be_t		rs_bound_addr;
404 	uint32_be_t		rs_conn_addr;
405 	uint16_be_t		rs_bound_port;
406 	uint16_be_t		rs_conn_port;
407 
408 	/*
409 	 * This is only used to communicate the transport between bind and
410 	 * initiating connections. All other trans use is referenced through
411 	 * the connection.
412 	 */
413 	struct rdsv3_transport	*rs_transport;
414 
415 	/*
416 	 * rdsv3_sendmsg caches the conn it used the last time around.
417 	 * This helps avoid costly lookups.
418 	 */
419 	struct rdsv3_connection	*rs_conn;
420 	kmutex_t 		rs_conn_lock;
421 
422 	/* flag indicating we were congested or not */
423 	int			rs_congested;
424 	/* seen congestion (ENOBUFS) when sending? */
425 	int			rs_seen_congestion;
426 	kmutex_t 		rs_congested_lock;
427 	kcondvar_t		rs_congested_cv;
428 
429 	/* rs_lock protects all these adjacent members before the newline */
430 	kmutex_t		rs_lock;
431 	struct list		rs_send_queue;
432 	uint32_t		rs_snd_bytes;
433 	int			rs_rcv_bytes;
434 	/* currently used for failed RDMAs */
435 	struct list		rs_notify_queue;
436 
437 	/*
438 	 * Congestion wake_up. If rs_cong_monitor is set, we use cong_mask
439 	 * to decide whether the application should be woken up.
440 	 * If not set, we use rs_cong_track to find out whether a cong map
441 	 * update arrived.
442 	 */
443 	uint64_t		rs_cong_mask;
444 	uint64_t		rs_cong_notify;
445 	struct list_node	rs_cong_list;
446 	unsigned long		rs_cong_track;
447 
448 	/*
449 	 * rs_recv_lock protects the receive queue, and is
450 	 * used to serialize with rdsv3_release.
451 	 */
452 	krwlock_t		rs_recv_lock;
453 	struct list		rs_recv_queue;
454 
455 	/* just for stats reporting */
456 	struct list_node	rs_item;
457 
458 	/* these have their own lock */
459 	kmutex_t		rs_rdma_lock;
460 	struct avl_tree		rs_rdma_keys;
461 
462 	/* Socket options - in case there will be more */
463 	unsigned char		rs_recverr,
464 				rs_cong_monitor;
465 
466 	cred_t			*rs_cred;
467 	zoneid_t		rs_zoneid;
468 };
469 
470 static inline struct rdsv3_sock *
rdsv3_sk_to_rs(const struct rsock * sk)471 rdsv3_sk_to_rs(const struct rsock *sk)
472 {
473 	return ((struct rdsv3_sock *)sk->sk_protinfo);
474 }
475 
476 static inline struct rsock *
rdsv3_rs_to_sk(const struct rdsv3_sock * rs)477 rdsv3_rs_to_sk(const struct rdsv3_sock *rs)
478 {
479 	return ((struct rsock *)rs->rs_sk);
480 }
481 
482 /*
483  * The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value
484  * to account for overhead.  We don't account for overhead, we just apply
485  * the number of payload bytes to the specified value.
486  */
487 static inline int
rdsv3_sk_sndbuf(struct rdsv3_sock * rs)488 rdsv3_sk_sndbuf(struct rdsv3_sock *rs)
489 {
490 	/* XXX */
491 	return (rdsv3_rs_to_sk(rs)->sk_sndbuf);
492 }
493 
494 static inline int
rdsv3_sk_rcvbuf(struct rdsv3_sock * rs)495 rdsv3_sk_rcvbuf(struct rdsv3_sock *rs)
496 {
497 	/* XXX */
498 	return (rdsv3_rs_to_sk(rs)->sk_rcvbuf);
499 }
500 
501 struct rdsv3_statistics {
502 	uint64_t	s_conn_reset;
503 	uint64_t	s_recv_drop_bad_checksum;
504 	uint64_t	s_recv_drop_old_seq;
505 	uint64_t	s_recv_drop_no_sock;
506 	uint64_t	s_recv_drop_dead_sock;
507 	uint64_t	s_recv_deliver_raced;
508 	uint64_t	s_recv_delivered;
509 	uint64_t	s_recv_queued;
510 	uint64_t	s_recv_immediate_retry;
511 	uint64_t	s_recv_delayed_retry;
512 	uint64_t	s_recv_ack_required;
513 	uint64_t	s_recv_rdma_bytes;
514 	uint64_t	s_recv_ping;
515 	uint64_t	s_send_queue_empty;
516 	uint64_t	s_send_queue_full;
517 	uint64_t	s_send_sem_contention;
518 	uint64_t	s_send_sem_queue_raced;
519 	uint64_t	s_send_immediate_retry;
520 	uint64_t	s_send_delayed_retry;
521 	uint64_t	s_send_drop_acked;
522 	uint64_t	s_send_ack_required;
523 	uint64_t	s_send_queued;
524 	uint64_t	s_send_rdma;
525 	uint64_t	s_send_rdma_bytes;
526 	uint64_t	s_send_pong;
527 	uint64_t	s_page_remainder_hit;
528 	uint64_t	s_page_remainder_miss;
529 	uint64_t	s_copy_to_user;
530 	uint64_t	s_copy_from_user;
531 	uint64_t	s_cong_update_queued;
532 	uint64_t	s_cong_update_received;
533 	uint64_t	s_cong_send_error;
534 	uint64_t	s_cong_send_blocked;
535 };
536 
537 /* af_rds.c */
538 void rdsv3_sock_addref(struct rdsv3_sock *rs);
539 void rdsv3_sock_put(struct rdsv3_sock *rs);
540 void rdsv3_wake_sk_sleep(struct rdsv3_sock *rs);
541 void __rdsv3_wake_sk_sleep(struct rsock *sk);
542 
543 /* bind.c */
544 int rdsv3_bind(sock_lower_handle_t proto_handle, struct sockaddr *sa,
545     socklen_t len, cred_t *cr);
546 void rdsv3_remove_bound(struct rdsv3_sock *rs);
547 struct rdsv3_sock *rdsv3_find_bound(struct rdsv3_connection *conn,
548     uint16_be_t port);
549 struct rdsv3_ip_bucket *rdsv3_find_ip_bucket(ipaddr_t, zoneid_t);
550 
551 /* conn.c */
552 int rdsv3_conn_init(void);
553 void rdsv3_conn_exit(void);
554 struct rdsv3_connection *rdsv3_conn_create(uint32_be_t laddr, uint32_be_t faddr,
555     struct rdsv3_transport *trans, int gfp);
556 struct rdsv3_connection *rdsv3_conn_create_outgoing(uint32_be_t laddr,
557     uint32_be_t faddr,
558     struct rdsv3_transport *trans, int gfp);
559 void rdsv3_conn_shutdown(struct rdsv3_connection *conn);
560 void rdsv3_conn_destroy(struct rdsv3_connection *conn);
561 void rdsv3_conn_reset(struct rdsv3_connection *conn);
562 void rdsv3_conn_drop(struct rdsv3_connection *conn);
563 void rdsv3_for_each_conn_info(struct rsock *sock, unsigned int len,
564     struct rdsv3_info_iterator *iter,
565     struct rdsv3_info_lengths *lens,
566     int (*visitor)(struct rdsv3_connection *, void *),
567     size_t item_len);
568 
569 static inline int
rdsv3_conn_transition(struct rdsv3_connection * conn,int old,int new)570 rdsv3_conn_transition(struct rdsv3_connection *conn, int old, int new)
571 {
572 	return (atomic_cmpxchg(&conn->c_state, old, new) == old);
573 }
574 
575 static inline int
rdsv3_conn_state(struct rdsv3_connection * conn)576 rdsv3_conn_state(struct rdsv3_connection *conn)
577 {
578 	return (atomic_get(&conn->c_state));
579 }
580 
581 static inline int
rdsv3_conn_up(struct rdsv3_connection * conn)582 rdsv3_conn_up(struct rdsv3_connection *conn)
583 {
584 	return (atomic_get(&conn->c_state) == RDSV3_CONN_UP);
585 }
586 
587 static inline int
rdsv3_conn_connecting(struct rdsv3_connection * conn)588 rdsv3_conn_connecting(struct rdsv3_connection *conn)
589 {
590 	return (atomic_get(&conn->c_state) == RDSV3_CONN_CONNECTING);
591 }
592 
593 /* recv.c */
594 void rdsv3_inc_init(struct rdsv3_incoming *inc, struct rdsv3_connection *conn,
595     uint32_be_t saddr);
596 void rdsv3_inc_addref(struct rdsv3_incoming *inc);
597 void rdsv3_inc_put(struct rdsv3_incoming *inc);
598 void rdsv3_recv_incoming(struct rdsv3_connection *conn, uint32_be_t saddr,
599     uint32_be_t daddr,
600     struct rdsv3_incoming *inc, int gfp);
601 int rdsv3_recvmsg(struct rdsv3_sock *rs, uio_t *uio,
602     struct msghdr *msg, size_t size, int msg_flags);
603 void rdsv3_clear_recv_queue(struct rdsv3_sock *rs);
604 int rdsv3_notify_queue_get(struct rdsv3_sock *rs, struct msghdr *msg);
605 void rdsv3_inc_info_copy(struct rdsv3_incoming *inc,
606     struct rdsv3_info_iterator *iter,
607     uint32_be_t saddr, uint32_be_t daddr, int flip);
608 
609 /* page.c */
610 int rdsv3_page_remainder_alloc(struct rdsv3_scatterlist *scat,
611     unsigned long bytes, int gfp);
612 
613 /* send.c */
614 int rdsv3_sendmsg(struct rdsv3_sock *rs, uio_t *uio, struct nmsghdr *msg,
615     size_t payload_len);
616 void rdsv3_send_reset(struct rdsv3_connection *conn);
617 int rdsv3_send_xmit(struct rdsv3_connection *conn);
618 struct sockaddr_in;
619 void rdsv3_send_drop_to(struct rdsv3_sock *rs, struct sockaddr_in *dest);
620 typedef int (*is_acked_func)(struct rdsv3_message *rm, uint64_t ack);
621 void rdsv3_send_drop_acked(struct rdsv3_connection *conn, uint64_t ack,
622     is_acked_func is_acked);
623 int rdsv3_send_acked_before(struct rdsv3_connection *conn, uint64_t seq);
624 void rdsv3_send_remove_from_sock(struct list *messages, int status);
625 int rdsv3_send_pong(struct rdsv3_connection *conn, uint16_be_t dport);
626 struct rdsv3_message *rdsv3_send_get_message(struct rdsv3_connection *,
627     struct rdsv3_rdma_op *);
628 
629 /* rdma.c */
630 void rdsv3_rdma_unuse(struct rdsv3_sock *rs, uint32_t r_key, int force);
631 
632 /* cong.c */
633 void rdsv3_cong_init(void);
634 int rdsv3_cong_get_maps(struct rdsv3_connection *conn);
635 void rdsv3_cong_add_conn(struct rdsv3_connection *conn);
636 void rdsv3_cong_remove_conn(struct rdsv3_connection *conn);
637 void rdsv3_cong_set_bit(struct rdsv3_cong_map *map, uint16_be_t port);
638 void rdsv3_cong_clear_bit(struct rdsv3_cong_map *map, uint16_be_t port);
639 int rdsv3_cong_wait(struct rdsv3_cong_map *map, uint16_be_t port, int nonblock,
640     struct rdsv3_sock *rs);
641 void rdsv3_cong_queue_updates(struct rdsv3_cong_map *map);
642 void rdsv3_cong_map_updated(struct rdsv3_cong_map *map, uint64_t);
643 int rdsv3_cong_updated_since(unsigned long *recent);
644 void rdsv3_cong_add_socket(struct rdsv3_sock *);
645 void rdsv3_cong_remove_socket(struct rdsv3_sock *);
646 void rdsv3_cong_exit(void);
647 struct rdsv3_message *rdsv3_cong_update_alloc(struct rdsv3_connection *conn);
648 
649 /* stats.c */
650 extern uint_t	nr_cpus;
651 extern struct rdsv3_statistics	*rdsv3_stats;
652 #define	rdsv3_per_cpu(var, cpu)  var[cpu]
653 #define	rdsv3_stats_add_which(which, member, count) do {	\
654 	rdsv3_per_cpu(which, CPU->cpu_seqid).member += count;	\
655 } while (0)
656 #define	rdsv3_stats_inc(member) \
657 	rdsv3_stats_add_which(rdsv3_stats, member, 1)
658 #define	rdsv3_stats_add(member, count)	\
659 	rdsv3_stats_add_which(rdsv3_stats, member, count)
660 int rdsv3_stats_init(void);
661 void rdsv3_stats_exit(void);
662 void rdsv3_stats_info_copy(struct rdsv3_info_iterator *iter,
663     uint64_t *values, char **names, size_t nr);
664 
665 
666 /* sysctl.c */
667 int rdsv3_sysctl_init(void);
668 void rdsv3_sysctl_exit(void);
669 extern unsigned long rdsv3_sysctl_sndbuf_min;
670 extern unsigned long rdsv3_sysctl_sndbuf_default;
671 extern unsigned long rdsv3_sysctl_sndbuf_max;
672 extern unsigned long rdsv3_sysctl_reconnect_min_jiffies;
673 extern unsigned long rdsv3_sysctl_reconnect_max_jiffies;
674 extern unsigned int  rdsv3_sysctl_max_unacked_packets;
675 extern unsigned int  rdsv3_sysctl_max_unacked_bytes;
676 extern unsigned int  rdsv3_sysctl_ping_enable;
677 extern unsigned long rdsv3_sysctl_trace_flags;
678 extern unsigned int  rdsv3_sysctl_trace_level;
679 
680 /* threads.c */
681 int rdsv3_threads_init();
682 void rdsv3_threads_exit(void);
683 extern struct rdsv3_workqueue_struct_s *rdsv3_wq;
684 void rdsv3_queue_reconnect(struct rdsv3_connection *conn);
685 void rdsv3_connect_worker(struct rdsv3_work_s *);
686 void rdsv3_shutdown_worker(struct rdsv3_work_s *);
687 void rdsv3_send_worker(struct rdsv3_work_s *);
688 void rdsv3_recv_worker(struct rdsv3_work_s *);
689 void rdsv3_reaper_worker(struct rdsv3_work_s *);
690 void rdsv3_connect_complete(struct rdsv3_connection *conn);
691 
692 /* transport.c */
693 int rdsv3_trans_register(struct rdsv3_transport *trans);
694 void rdsv3_trans_unregister(struct rdsv3_transport *trans);
695 struct rdsv3_transport *rdsv3_trans_get_preferred(uint32_be_t addr);
696 unsigned int rdsv3_trans_stats_info_copy(struct rdsv3_info_iterator *iter,
697     unsigned int avail);
698 void rdsv3_trans_exit(void);
699 
700 /* message.c */
701 struct rdsv3_message *rdsv3_message_alloc(unsigned int nents, int gfp);
702 struct rdsv3_message *rdsv3_message_copy_from_user(struct uio *uiop,
703     size_t total_len);
704 struct rdsv3_message *rdsv3_message_map_pages(unsigned long *page_addrs,
705     unsigned int total_len);
706 void rdsv3_message_populate_header(struct rdsv3_header *hdr, uint16_be_t sport,
707     uint16_be_t dport, uint64_t seq);
708 int rdsv3_message_add_extension(struct rdsv3_header *hdr,
709     unsigned int type, const void *data, unsigned int len);
710 int rdsv3_message_next_extension(struct rdsv3_header *hdr,
711     unsigned int *pos, void *buf, unsigned int *buflen);
712 int rdsv3_message_add_version_extension(struct rdsv3_header *hdr,
713     unsigned int version);
714 int rdsv3_message_get_version_extension(struct rdsv3_header *hdr,
715     unsigned int *version);
716 int rdsv3_message_add_rdma_dest_extension(struct rdsv3_header *hdr,
717     uint32_t r_key, uint32_t offset);
718 int rdsv3_message_inc_copy_to_user(struct rdsv3_incoming *inc,
719     uio_t *uio, size_t size);
720 void rdsv3_message_inc_free(struct rdsv3_incoming *inc);
721 void rdsv3_message_addref(struct rdsv3_message *rm);
722 void rdsv3_message_put(struct rdsv3_message *rm);
723 void rdsv3_message_wait(struct rdsv3_message *rm);
724 void rdsv3_message_unmapped(struct rdsv3_message *rm);
725 
726 static inline void
rdsv3_message_make_checksum(struct rdsv3_header * hdr)727 rdsv3_message_make_checksum(struct rdsv3_header *hdr)
728 {
729 	hdr->h_csum = 0;
730 	hdr->h_csum =
731 	    rdsv3_ip_fast_csum((void *)hdr, sizeof (*hdr) >> 2);
732 }
733 
734 static inline int
rdsv3_message_verify_checksum(const struct rdsv3_header * hdr)735 rdsv3_message_verify_checksum(const struct rdsv3_header *hdr)
736 {
737 	return (!hdr->h_csum ||
738 	    rdsv3_ip_fast_csum((void *)hdr, sizeof (*hdr) >> 2) == 0);
739 }
740 
741 /* rdsv3_sc.c */
742 extern boolean_t rdsv3_if_lookup_by_name(char *if_name);
743 extern int rdsv3_sc_path_lookup(ipaddr_t *localip, ipaddr_t *remip);
744 extern ipaddr_t rdsv3_scaddr_to_ibaddr(ipaddr_t addr);
745 
746 #ifdef	__cplusplus
747 }
748 #endif
749 
750 #endif /* _RDSV3_RDSV3_H */
751