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-rw-r--r--net/rds/rds.h686
1 files changed, 686 insertions, 0 deletions
diff --git a/net/rds/rds.h b/net/rds/rds.h
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1#ifndef _RDS_RDS_H
2#define _RDS_RDS_H
3
4#include <net/sock.h>
5#include <linux/scatterlist.h>
6#include <linux/highmem.h>
7#include <rdma/rdma_cm.h>
8#include <linux/mutex.h>
9#include <linux/rds.h>
10
11#include "info.h"
12
13/*
14 * RDS Network protocol version
15 */
16#define RDS_PROTOCOL_3_0 0x0300
17#define RDS_PROTOCOL_3_1 0x0301
18#define RDS_PROTOCOL_VERSION RDS_PROTOCOL_3_1
19#define RDS_PROTOCOL_MAJOR(v) ((v) >> 8)
20#define RDS_PROTOCOL_MINOR(v) ((v) & 255)
21#define RDS_PROTOCOL(maj, min) (((maj) << 8) | min)
22
23/*
24 * XXX randomly chosen, but at least seems to be unused:
25 * # 18464-18768 Unassigned
26 * We should do better. We want a reserved port to discourage unpriv'ed
27 * userspace from listening.
28 */
29#define RDS_PORT 18634
30
31#ifdef DEBUG
32#define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args)
33#else
34/* sigh, pr_debug() causes unused variable warnings */
35static inline void __attribute__ ((format (printf, 1, 2)))
36rdsdebug(char *fmt, ...)
37{
38}
39#endif
40
41/* XXX is there one of these somewhere? */
42#define ceil(x, y) \
43 ({ unsigned long __x = (x), __y = (y); (__x + __y - 1) / __y; })
44
45#define RDS_FRAG_SHIFT 12
46#define RDS_FRAG_SIZE ((unsigned int)(1 << RDS_FRAG_SHIFT))
47
48#define RDS_CONG_MAP_BYTES (65536 / 8)
49#define RDS_CONG_MAP_LONGS (RDS_CONG_MAP_BYTES / sizeof(unsigned long))
50#define RDS_CONG_MAP_PAGES (PAGE_ALIGN(RDS_CONG_MAP_BYTES) / PAGE_SIZE)
51#define RDS_CONG_MAP_PAGE_BITS (PAGE_SIZE * 8)
52
53struct rds_cong_map {
54 struct rb_node m_rb_node;
55 __be32 m_addr;
56 wait_queue_head_t m_waitq;
57 struct list_head m_conn_list;
58 unsigned long m_page_addrs[RDS_CONG_MAP_PAGES];
59};
60
61
62/*
63 * This is how we will track the connection state:
64 * A connection is always in one of the following
65 * states. Updates to the state are atomic and imply
66 * a memory barrier.
67 */
68enum {
69 RDS_CONN_DOWN = 0,
70 RDS_CONN_CONNECTING,
71 RDS_CONN_DISCONNECTING,
72 RDS_CONN_UP,
73 RDS_CONN_ERROR,
74};
75
76/* Bits for c_flags */
77#define RDS_LL_SEND_FULL 0
78#define RDS_RECONNECT_PENDING 1
79
80struct rds_connection {
81 struct hlist_node c_hash_node;
82 __be32 c_laddr;
83 __be32 c_faddr;
84 unsigned int c_loopback:1;
85 struct rds_connection *c_passive;
86
87 struct rds_cong_map *c_lcong;
88 struct rds_cong_map *c_fcong;
89
90 struct mutex c_send_lock; /* protect send ring */
91 struct rds_message *c_xmit_rm;
92 unsigned long c_xmit_sg;
93 unsigned int c_xmit_hdr_off;
94 unsigned int c_xmit_data_off;
95 unsigned int c_xmit_rdma_sent;
96
97 spinlock_t c_lock; /* protect msg queues */
98 u64 c_next_tx_seq;
99 struct list_head c_send_queue;
100 struct list_head c_retrans;
101
102 u64 c_next_rx_seq;
103
104 struct rds_transport *c_trans;
105 void *c_transport_data;
106
107 atomic_t c_state;
108 unsigned long c_flags;
109 unsigned long c_reconnect_jiffies;
110 struct delayed_work c_send_w;
111 struct delayed_work c_recv_w;
112 struct delayed_work c_conn_w;
113 struct work_struct c_down_w;
114 struct mutex c_cm_lock; /* protect conn state & cm */
115
116 struct list_head c_map_item;
117 unsigned long c_map_queued;
118 unsigned long c_map_offset;
119 unsigned long c_map_bytes;
120
121 unsigned int c_unacked_packets;
122 unsigned int c_unacked_bytes;
123
124 /* Protocol version */
125 unsigned int c_version;
126};
127
128#define RDS_FLAG_CONG_BITMAP 0x01
129#define RDS_FLAG_ACK_REQUIRED 0x02
130#define RDS_FLAG_RETRANSMITTED 0x04
131#define RDS_MAX_ADV_CREDIT 127
132
133/*
134 * Maximum space available for extension headers.
135 */
136#define RDS_HEADER_EXT_SPACE 16
137
138struct rds_header {
139 __be64 h_sequence;
140 __be64 h_ack;
141 __be32 h_len;
142 __be16 h_sport;
143 __be16 h_dport;
144 u8 h_flags;
145 u8 h_credit;
146 u8 h_padding[4];
147 __sum16 h_csum;
148
149 u8 h_exthdr[RDS_HEADER_EXT_SPACE];
150};
151
152/*
153 * Reserved - indicates end of extensions
154 */
155#define RDS_EXTHDR_NONE 0
156
157/*
158 * This extension header is included in the very
159 * first message that is sent on a new connection,
160 * and identifies the protocol level. This will help
161 * rolling updates if a future change requires breaking
162 * the protocol.
163 * NB: This is no longer true for IB, where we do a version
164 * negotiation during the connection setup phase (protocol
165 * version information is included in the RDMA CM private data).
166 */
167#define RDS_EXTHDR_VERSION 1
168struct rds_ext_header_version {
169 __be32 h_version;
170};
171
172/*
173 * This extension header is included in the RDS message
174 * chasing an RDMA operation.
175 */
176#define RDS_EXTHDR_RDMA 2
177struct rds_ext_header_rdma {
178 __be32 h_rdma_rkey;
179};
180
181/*
182 * This extension header tells the peer about the
183 * destination <R_Key,offset> of the requested RDMA
184 * operation.
185 */
186#define RDS_EXTHDR_RDMA_DEST 3
187struct rds_ext_header_rdma_dest {
188 __be32 h_rdma_rkey;
189 __be32 h_rdma_offset;
190};
191
192#define __RDS_EXTHDR_MAX 16 /* for now */
193
194struct rds_incoming {
195 atomic_t i_refcount;
196 struct list_head i_item;
197 struct rds_connection *i_conn;
198 struct rds_header i_hdr;
199 unsigned long i_rx_jiffies;
200 __be32 i_saddr;
201
202 rds_rdma_cookie_t i_rdma_cookie;
203};
204
205/*
206 * m_sock_item and m_conn_item are on lists that are serialized under
207 * conn->c_lock. m_sock_item has additional meaning in that once it is empty
208 * the message will not be put back on the retransmit list after being sent.
209 * messages that are canceled while being sent rely on this.
210 *
211 * m_inc is used by loopback so that it can pass an incoming message straight
212 * back up into the rx path. It embeds a wire header which is also used by
213 * the send path, which is kind of awkward.
214 *
215 * m_sock_item indicates the message's presence on a socket's send or receive
216 * queue. m_rs will point to that socket.
217 *
218 * m_daddr is used by cancellation to prune messages to a given destination.
219 *
220 * The RDS_MSG_ON_SOCK and RDS_MSG_ON_CONN flags are used to avoid lock
221 * nesting. As paths iterate over messages on a sock, or conn, they must
222 * also lock the conn, or sock, to remove the message from those lists too.
223 * Testing the flag to determine if the message is still on the lists lets
224 * us avoid testing the list_head directly. That means each path can use
225 * the message's list_head to keep it on a local list while juggling locks
226 * without confusing the other path.
227 *
228 * m_ack_seq is an optional field set by transports who need a different
229 * sequence number range to invalidate. They can use this in a callback
230 * that they pass to rds_send_drop_acked() to see if each message has been
231 * acked. The HAS_ACK_SEQ flag can be used to detect messages which haven't
232 * had ack_seq set yet.
233 */
234#define RDS_MSG_ON_SOCK 1
235#define RDS_MSG_ON_CONN 2
236#define RDS_MSG_HAS_ACK_SEQ 3
237#define RDS_MSG_ACK_REQUIRED 4
238#define RDS_MSG_RETRANSMITTED 5
239#define RDS_MSG_MAPPED 6
240#define RDS_MSG_PAGEVEC 7
241
242struct rds_message {
243 atomic_t m_refcount;
244 struct list_head m_sock_item;
245 struct list_head m_conn_item;
246 struct rds_incoming m_inc;
247 u64 m_ack_seq;
248 __be32 m_daddr;
249 unsigned long m_flags;
250
251 /* Never access m_rs without holding m_rs_lock.
252 * Lock nesting is
253 * rm->m_rs_lock
254 * -> rs->rs_lock
255 */
256 spinlock_t m_rs_lock;
257 struct rds_sock *m_rs;
258 struct rds_rdma_op *m_rdma_op;
259 rds_rdma_cookie_t m_rdma_cookie;
260 struct rds_mr *m_rdma_mr;
261 unsigned int m_nents;
262 unsigned int m_count;
263 struct scatterlist m_sg[0];
264};
265
266/*
267 * The RDS notifier is used (optionally) to tell the application about
268 * completed RDMA operations. Rather than keeping the whole rds message
269 * around on the queue, we allocate a small notifier that is put on the
270 * socket's notifier_list. Notifications are delivered to the application
271 * through control messages.
272 */
273struct rds_notifier {
274 struct list_head n_list;
275 uint64_t n_user_token;
276 int n_status;
277};
278
279/**
280 * struct rds_transport - transport specific behavioural hooks
281 *
282 * @xmit: .xmit is called by rds_send_xmit() to tell the transport to send
283 * part of a message. The caller serializes on the send_sem so this
284 * doesn't need to be reentrant for a given conn. The header must be
285 * sent before the data payload. .xmit must be prepared to send a
286 * message with no data payload. .xmit should return the number of
287 * bytes that were sent down the connection, including header bytes.
288 * Returning 0 tells the caller that it doesn't need to perform any
289 * additional work now. This is usually the case when the transport has
290 * filled the sending queue for its connection and will handle
291 * triggering the rds thread to continue the send when space becomes
292 * available. Returning -EAGAIN tells the caller to retry the send
293 * immediately. Returning -ENOMEM tells the caller to retry the send at
294 * some point in the future.
295 *
296 * @conn_shutdown: conn_shutdown stops traffic on the given connection. Once
297 * it returns the connection can not call rds_recv_incoming().
298 * This will only be called once after conn_connect returns
299 * non-zero success and will The caller serializes this with
300 * the send and connecting paths (xmit_* and conn_*). The
301 * transport is responsible for other serialization, including
302 * rds_recv_incoming(). This is called in process context but
303 * should try hard not to block.
304 *
305 * @xmit_cong_map: This asks the transport to send the local bitmap down the
306 * given connection. XXX get a better story about the bitmap
307 * flag and header.
308 */
309
310struct rds_transport {
311 char t_name[TRANSNAMSIZ];
312 struct list_head t_item;
313 struct module *t_owner;
314 unsigned int t_prefer_loopback:1;
315
316 int (*laddr_check)(__be32 addr);
317 int (*conn_alloc)(struct rds_connection *conn, gfp_t gfp);
318 void (*conn_free)(void *data);
319 int (*conn_connect)(struct rds_connection *conn);
320 void (*conn_shutdown)(struct rds_connection *conn);
321 void (*xmit_prepare)(struct rds_connection *conn);
322 void (*xmit_complete)(struct rds_connection *conn);
323 int (*xmit)(struct rds_connection *conn, struct rds_message *rm,
324 unsigned int hdr_off, unsigned int sg, unsigned int off);
325 int (*xmit_cong_map)(struct rds_connection *conn,
326 struct rds_cong_map *map, unsigned long offset);
327 int (*xmit_rdma)(struct rds_connection *conn, struct rds_rdma_op *op);
328 int (*recv)(struct rds_connection *conn);
329 int (*inc_copy_to_user)(struct rds_incoming *inc, struct iovec *iov,
330 size_t size);
331 void (*inc_purge)(struct rds_incoming *inc);
332 void (*inc_free)(struct rds_incoming *inc);
333
334 int (*cm_handle_connect)(struct rdma_cm_id *cm_id,
335 struct rdma_cm_event *event);
336 int (*cm_initiate_connect)(struct rdma_cm_id *cm_id);
337 void (*cm_connect_complete)(struct rds_connection *conn,
338 struct rdma_cm_event *event);
339
340 unsigned int (*stats_info_copy)(struct rds_info_iterator *iter,
341 unsigned int avail);
342 void (*exit)(void);
343 void *(*get_mr)(struct scatterlist *sg, unsigned long nr_sg,
344 struct rds_sock *rs, u32 *key_ret);
345 void (*sync_mr)(void *trans_private, int direction);
346 void (*free_mr)(void *trans_private, int invalidate);
347 void (*flush_mrs)(void);
348};
349
350struct rds_sock {
351 struct sock rs_sk;
352
353 u64 rs_user_addr;
354 u64 rs_user_bytes;
355
356 /*
357 * bound_addr used for both incoming and outgoing, no INADDR_ANY
358 * support.
359 */
360 struct rb_node rs_bound_node;
361 __be32 rs_bound_addr;
362 __be32 rs_conn_addr;
363 __be16 rs_bound_port;
364 __be16 rs_conn_port;
365
366 /*
367 * This is only used to communicate the transport between bind and
368 * initiating connections. All other trans use is referenced through
369 * the connection.
370 */
371 struct rds_transport *rs_transport;
372
373 /*
374 * rds_sendmsg caches the conn it used the last time around.
375 * This helps avoid costly lookups.
376 */
377 struct rds_connection *rs_conn;
378
379 /* flag indicating we were congested or not */
380 int rs_congested;
381
382 /* rs_lock protects all these adjacent members before the newline */
383 spinlock_t rs_lock;
384 struct list_head rs_send_queue;
385 u32 rs_snd_bytes;
386 int rs_rcv_bytes;
387 struct list_head rs_notify_queue; /* currently used for failed RDMAs */
388
389 /* Congestion wake_up. If rs_cong_monitor is set, we use cong_mask
390 * to decide whether the application should be woken up.
391 * If not set, we use rs_cong_track to find out whether a cong map
392 * update arrived.
393 */
394 uint64_t rs_cong_mask;
395 uint64_t rs_cong_notify;
396 struct list_head rs_cong_list;
397 unsigned long rs_cong_track;
398
399 /*
400 * rs_recv_lock protects the receive queue, and is
401 * used to serialize with rds_release.
402 */
403 rwlock_t rs_recv_lock;
404 struct list_head rs_recv_queue;
405
406 /* just for stats reporting */
407 struct list_head rs_item;
408
409 /* these have their own lock */
410 spinlock_t rs_rdma_lock;
411 struct rb_root rs_rdma_keys;
412
413 /* Socket options - in case there will be more */
414 unsigned char rs_recverr,
415 rs_cong_monitor;
416};
417
418static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk)
419{
420 return container_of(sk, struct rds_sock, rs_sk);
421}
422static inline struct sock *rds_rs_to_sk(struct rds_sock *rs)
423{
424 return &rs->rs_sk;
425}
426
427/*
428 * The stack assigns sk_sndbuf and sk_rcvbuf to twice the specified value
429 * to account for overhead. We don't account for overhead, we just apply
430 * the number of payload bytes to the specified value.
431 */
432static inline int rds_sk_sndbuf(struct rds_sock *rs)
433{
434 return rds_rs_to_sk(rs)->sk_sndbuf / 2;
435}
436static inline int rds_sk_rcvbuf(struct rds_sock *rs)
437{
438 return rds_rs_to_sk(rs)->sk_rcvbuf / 2;
439}
440
441struct rds_statistics {
442 uint64_t s_conn_reset;
443 uint64_t s_recv_drop_bad_checksum;
444 uint64_t s_recv_drop_old_seq;
445 uint64_t s_recv_drop_no_sock;
446 uint64_t s_recv_drop_dead_sock;
447 uint64_t s_recv_deliver_raced;
448 uint64_t s_recv_delivered;
449 uint64_t s_recv_queued;
450 uint64_t s_recv_immediate_retry;
451 uint64_t s_recv_delayed_retry;
452 uint64_t s_recv_ack_required;
453 uint64_t s_recv_rdma_bytes;
454 uint64_t s_recv_ping;
455 uint64_t s_send_queue_empty;
456 uint64_t s_send_queue_full;
457 uint64_t s_send_sem_contention;
458 uint64_t s_send_sem_queue_raced;
459 uint64_t s_send_immediate_retry;
460 uint64_t s_send_delayed_retry;
461 uint64_t s_send_drop_acked;
462 uint64_t s_send_ack_required;
463 uint64_t s_send_queued;
464 uint64_t s_send_rdma;
465 uint64_t s_send_rdma_bytes;
466 uint64_t s_send_pong;
467 uint64_t s_page_remainder_hit;
468 uint64_t s_page_remainder_miss;
469 uint64_t s_copy_to_user;
470 uint64_t s_copy_from_user;
471 uint64_t s_cong_update_queued;
472 uint64_t s_cong_update_received;
473 uint64_t s_cong_send_error;
474 uint64_t s_cong_send_blocked;
475};
476
477/* af_rds.c */
478void rds_sock_addref(struct rds_sock *rs);
479void rds_sock_put(struct rds_sock *rs);
480void rds_wake_sk_sleep(struct rds_sock *rs);
481static inline void __rds_wake_sk_sleep(struct sock *sk)
482{
483 wait_queue_head_t *waitq = sk->sk_sleep;
484
485 if (!sock_flag(sk, SOCK_DEAD) && waitq)
486 wake_up(waitq);
487}
488extern wait_queue_head_t rds_poll_waitq;
489
490
491/* bind.c */
492int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
493void rds_remove_bound(struct rds_sock *rs);
494struct rds_sock *rds_find_bound(__be32 addr, __be16 port);
495
496/* cong.c */
497int rds_cong_get_maps(struct rds_connection *conn);
498void rds_cong_add_conn(struct rds_connection *conn);
499void rds_cong_remove_conn(struct rds_connection *conn);
500void rds_cong_set_bit(struct rds_cong_map *map, __be16 port);
501void rds_cong_clear_bit(struct rds_cong_map *map, __be16 port);
502int rds_cong_wait(struct rds_cong_map *map, __be16 port, int nonblock, struct rds_sock *rs);
503void rds_cong_queue_updates(struct rds_cong_map *map);
504void rds_cong_map_updated(struct rds_cong_map *map, uint64_t);
505int rds_cong_updated_since(unsigned long *recent);
506void rds_cong_add_socket(struct rds_sock *);
507void rds_cong_remove_socket(struct rds_sock *);
508void rds_cong_exit(void);
509struct rds_message *rds_cong_update_alloc(struct rds_connection *conn);
510
511/* conn.c */
512int __init rds_conn_init(void);
513void rds_conn_exit(void);
514struct rds_connection *rds_conn_create(__be32 laddr, __be32 faddr,
515 struct rds_transport *trans, gfp_t gfp);
516struct rds_connection *rds_conn_create_outgoing(__be32 laddr, __be32 faddr,
517 struct rds_transport *trans, gfp_t gfp);
518void rds_conn_destroy(struct rds_connection *conn);
519void rds_conn_reset(struct rds_connection *conn);
520void rds_conn_drop(struct rds_connection *conn);
521void rds_for_each_conn_info(struct socket *sock, unsigned int len,
522 struct rds_info_iterator *iter,
523 struct rds_info_lengths *lens,
524 int (*visitor)(struct rds_connection *, void *),
525 size_t item_len);
526void __rds_conn_error(struct rds_connection *conn, const char *, ...)
527 __attribute__ ((format (printf, 2, 3)));
528#define rds_conn_error(conn, fmt...) \
529 __rds_conn_error(conn, KERN_WARNING "RDS: " fmt)
530
531static inline int
532rds_conn_transition(struct rds_connection *conn, int old, int new)
533{
534 return atomic_cmpxchg(&conn->c_state, old, new) == old;
535}
536
537static inline int
538rds_conn_state(struct rds_connection *conn)
539{
540 return atomic_read(&conn->c_state);
541}
542
543static inline int
544rds_conn_up(struct rds_connection *conn)
545{
546 return atomic_read(&conn->c_state) == RDS_CONN_UP;
547}
548
549static inline int
550rds_conn_connecting(struct rds_connection *conn)
551{
552 return atomic_read(&conn->c_state) == RDS_CONN_CONNECTING;
553}
554
555/* message.c */
556struct rds_message *rds_message_alloc(unsigned int nents, gfp_t gfp);
557struct rds_message *rds_message_copy_from_user(struct iovec *first_iov,
558 size_t total_len);
559struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned int total_len);
560void rds_message_populate_header(struct rds_header *hdr, __be16 sport,
561 __be16 dport, u64 seq);
562int rds_message_add_extension(struct rds_header *hdr,
563 unsigned int type, const void *data, unsigned int len);
564int rds_message_next_extension(struct rds_header *hdr,
565 unsigned int *pos, void *buf, unsigned int *buflen);
566int rds_message_add_version_extension(struct rds_header *hdr, unsigned int version);
567int rds_message_get_version_extension(struct rds_header *hdr, unsigned int *version);
568int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset);
569int rds_message_inc_copy_to_user(struct rds_incoming *inc,
570 struct iovec *first_iov, size_t size);
571void rds_message_inc_purge(struct rds_incoming *inc);
572void rds_message_inc_free(struct rds_incoming *inc);
573void rds_message_addref(struct rds_message *rm);
574void rds_message_put(struct rds_message *rm);
575void rds_message_wait(struct rds_message *rm);
576void rds_message_unmapped(struct rds_message *rm);
577
578static inline void rds_message_make_checksum(struct rds_header *hdr)
579{
580 hdr->h_csum = 0;
581 hdr->h_csum = ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2);
582}
583
584static inline int rds_message_verify_checksum(const struct rds_header *hdr)
585{
586 return !hdr->h_csum || ip_fast_csum((void *) hdr, sizeof(*hdr) >> 2) == 0;
587}
588
589
590/* page.c */
591int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes,
592 gfp_t gfp);
593int rds_page_copy_user(struct page *page, unsigned long offset,
594 void __user *ptr, unsigned long bytes,
595 int to_user);
596#define rds_page_copy_to_user(page, offset, ptr, bytes) \
597 rds_page_copy_user(page, offset, ptr, bytes, 1)
598#define rds_page_copy_from_user(page, offset, ptr, bytes) \
599 rds_page_copy_user(page, offset, ptr, bytes, 0)
600void rds_page_exit(void);
601
602/* recv.c */
603void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
604 __be32 saddr);
605void rds_inc_addref(struct rds_incoming *inc);
606void rds_inc_put(struct rds_incoming *inc);
607void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr,
608 struct rds_incoming *inc, gfp_t gfp, enum km_type km);
609int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
610 size_t size, int msg_flags);
611void rds_clear_recv_queue(struct rds_sock *rs);
612int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msg);
613void rds_inc_info_copy(struct rds_incoming *inc,
614 struct rds_info_iterator *iter,
615 __be32 saddr, __be32 daddr, int flip);
616
617/* send.c */
618int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
619 size_t payload_len);
620void rds_send_reset(struct rds_connection *conn);
621int rds_send_xmit(struct rds_connection *conn);
622struct sockaddr_in;
623void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest);
624typedef int (*is_acked_func)(struct rds_message *rm, uint64_t ack);
625void rds_send_drop_acked(struct rds_connection *conn, u64 ack,
626 is_acked_func is_acked);
627int rds_send_acked_before(struct rds_connection *conn, u64 seq);
628void rds_send_remove_from_sock(struct list_head *messages, int status);
629int rds_send_pong(struct rds_connection *conn, __be16 dport);
630struct rds_message *rds_send_get_message(struct rds_connection *,
631 struct rds_rdma_op *);
632
633/* rdma.c */
634void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force);
635
636/* stats.c */
637DECLARE_PER_CPU(struct rds_statistics, rds_stats);
638#define rds_stats_inc_which(which, member) do { \
639 per_cpu(which, get_cpu()).member++; \
640 put_cpu(); \
641} while (0)
642#define rds_stats_inc(member) rds_stats_inc_which(rds_stats, member)
643#define rds_stats_add_which(which, member, count) do { \
644 per_cpu(which, get_cpu()).member += count; \
645 put_cpu(); \
646} while (0)
647#define rds_stats_add(member, count) rds_stats_add_which(rds_stats, member, count)
648int __init rds_stats_init(void);
649void rds_stats_exit(void);
650void rds_stats_info_copy(struct rds_info_iterator *iter,
651 uint64_t *values, char **names, size_t nr);
652
653/* sysctl.c */
654int __init rds_sysctl_init(void);
655void rds_sysctl_exit(void);
656extern unsigned long rds_sysctl_sndbuf_min;
657extern unsigned long rds_sysctl_sndbuf_default;
658extern unsigned long rds_sysctl_sndbuf_max;
659extern unsigned long rds_sysctl_reconnect_min_jiffies;
660extern unsigned long rds_sysctl_reconnect_max_jiffies;
661extern unsigned int rds_sysctl_max_unacked_packets;
662extern unsigned int rds_sysctl_max_unacked_bytes;
663extern unsigned int rds_sysctl_ping_enable;
664extern unsigned long rds_sysctl_trace_flags;
665extern unsigned int rds_sysctl_trace_level;
666
667/* threads.c */
668int __init rds_threads_init(void);
669void rds_threads_exit(void);
670extern struct workqueue_struct *rds_wq;
671void rds_connect_worker(struct work_struct *);
672void rds_shutdown_worker(struct work_struct *);
673void rds_send_worker(struct work_struct *);
674void rds_recv_worker(struct work_struct *);
675void rds_connect_complete(struct rds_connection *conn);
676
677/* transport.c */
678int rds_trans_register(struct rds_transport *trans);
679void rds_trans_unregister(struct rds_transport *trans);
680struct rds_transport *rds_trans_get_preferred(__be32 addr);
681unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter,
682 unsigned int avail);
683int __init rds_trans_init(void);
684void rds_trans_exit(void);
685
686#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 06:20:17 -0500