2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
4 * Copyright (c) 2011, 2017, Intel Corporation.
6 * Author: Zach Brown <zab@zabbo.net>
7 * Author: Peter J. Braam <braam@clusterfs.com>
8 * Author: Phil Schwan <phil@clusterfs.com>
9 * Author: Eric Barton <eric@bartonsoftware.com>
11 * This file is part of Lustre, http://www.lustre.org
13 * Portals is free software; you can redistribute it and/or
14 * modify it under the terms of version 2 of the GNU General Public
15 * License as published by the Free Software Foundation.
17 * Portals is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with Portals; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #ifndef _SOCKLND_SOCKLND_H_
29 #define _SOCKLND_SOCKLND_H_
31 #define DEBUG_PORTAL_ALLOC
32 #define DEBUG_SUBSYSTEM S_LND
34 #include <linux/crc32.h>
35 #include <linux/errno.h>
37 #include <linux/init.h>
38 #include <linux/kernel.h>
39 #include <linux/kthread.h>
40 #include <linux/kmod.h>
41 #include <linux/list.h>
43 #include <linux/module.h>
44 #include <linux/pagemap.h>
45 #include <linux/refcount.h>
46 #include <linux/stat.h>
47 #include <linux/string.h>
48 #include <linux/syscalls.h>
49 #include <linux/sysctl.h>
50 #include <linux/uio.h>
51 #include <linux/unistd.h>
52 #include <linux/hashtable.h>
56 #include <lnet/lib-lnet.h>
57 #include <lnet/socklnd.h>
59 #ifndef NETIF_F_CSUM_MASK
60 # define NETIF_F_CSUM_MASK NETIF_F_ALL_CSUM
63 /* assume one thread for each connection type */
64 #define SOCKNAL_NSCHEDS 3
65 #define SOCKNAL_NSCHEDS_HIGH (SOCKNAL_NSCHEDS << 1)
67 #define SOCKNAL_PEER_HASH_BITS 7 /* log2 of # peer_ni lists */
68 #define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */
69 #define SOCKNAL_ENOMEM_RETRY 1 /* seconds between retries */
71 #define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
72 #define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
74 #define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
76 /* risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
77 * no risk if we're not running on a CONFIG_HIGHMEM platform. */
79 # define SOCKNAL_RISK_KMAP_DEADLOCK 0
81 # define SOCKNAL_RISK_KMAP_DEADLOCK 1
84 /* per scheduler state */
88 /* conn waiting to be written */
89 struct list_head kss_rx_conns;
90 struct list_head kss_tx_conns;
91 /* zombie noop tx list */
92 struct list_head kss_zombie_noop_txs;
93 /* where scheduler sleeps */
94 wait_queue_head_t kss_waitq;
95 /* # connections assigned to this scheduler */
97 /* max allowed threads */
99 /* number of threads */
105 #define KSOCK_CPT_SHIFT 16
106 #define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
107 #define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
108 #define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
110 struct ksock_interface { /* in-use interface */
111 int ksni_index; /* Linux interface index */
112 struct sockaddr_storage ksni_addr; /* interface's address */
113 __u32 ksni_netmask; /* interface's network mask */
114 int ksni_nroutes; /* # routes using (active) */
115 int ksni_npeers; /* # peers using (passive) */
116 char ksni_name[IFNAMSIZ]; /* interface name */
119 struct ksock_tunables {
120 /* "stuck" socket timeout (seconds) */
122 /* # scheduler threads in each pool while starting */
124 int *ksnd_nconnds; /* # connection daemons */
125 int *ksnd_nconnds_max; /* max # connection daemons */
126 int *ksnd_min_reconnectms; /* first connection retry after (ms)... */
127 int *ksnd_max_reconnectms; /* ...exponentially increasing to this */
128 int *ksnd_eager_ack; /* make TCP ack eagerly? */
129 int *ksnd_typed_conns; /* drive sockets by type? */
130 int *ksnd_min_bulk; /* smallest "large" message */
131 int *ksnd_tx_buffer_size; /* socket tx buffer size */
132 int *ksnd_rx_buffer_size; /* socket rx buffer size */
133 int *ksnd_nagle; /* enable NAGLE? */
134 int *ksnd_round_robin; /* round robin for multiple interfaces */
135 int *ksnd_keepalive; /* # secs for sending keepalive NOOP */
136 int *ksnd_keepalive_idle; /* # idle secs before 1st probe */
137 int *ksnd_keepalive_count; /* # probes */
138 int *ksnd_keepalive_intvl; /* time between probes */
139 int *ksnd_credits; /* # concurrent sends */
140 int *ksnd_peertxcredits; /* # concurrent sends to 1 peer_ni */
141 int *ksnd_peerrtrcredits; /* # per-peer_ni router buffer credits */
142 int *ksnd_peertimeout; /* seconds to consider peer_ni dead */
143 int *ksnd_enable_csum; /* enable check sum */
144 int *ksnd_inject_csum_error; /* set non-zero to inject checksum error */
145 int *ksnd_nonblk_zcack; /* always send zc-ack on non-blocking connection */
146 unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload size */
147 int *ksnd_zc_recv; /* enable ZC receive (for Chelsio TOE) */
148 int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to enable ZC receive */
149 int *ksnd_irq_affinity; /* enable IRQ affinity? */
150 #ifdef SOCKNAL_BACKOFF
151 int *ksnd_backoff_init; /* initial TCP backoff */
152 int *ksnd_backoff_max; /* maximum TCP backoff */
154 #if SOCKNAL_VERSION_DEBUG
155 int *ksnd_protocol; /* protocol version */
160 __u64 ksnn_incarnation; /* my epoch */
161 struct list_head ksnn_list; /* chain on global list */
162 atomic_t ksnn_npeers; /* # peers */
163 int ksnn_ninterfaces; /* IP interfaces */
164 struct ksock_interface ksnn_interfaces[LNET_INTERFACES_NUM];
166 /* When the ksock_net is shut down, this (negative) bias is added to
167 * ksnn_npeers, which prevents new peers from being added.
169 #define SOCKNAL_SHUTDOWN_BIAS (INT_MIN+1)
172 #define SOCKNAL_CONND_TIMEOUT 120
173 /** reserved thread for accepting & creating new connd */
174 #define SOCKNAL_CONND_RESV 1
176 struct ksock_nal_data {
177 int ksnd_init; /* initialisation state */
178 int ksnd_nnets; /* # networks set up */
179 struct list_head ksnd_nets; /* list of nets */
180 /* stabilize peer_ni/conn ops */
181 rwlock_t ksnd_global_lock;
182 /* hash table of all my known peers */
183 DECLARE_HASHTABLE(ksnd_peers, SOCKNAL_PEER_HASH_BITS);
185 atomic_t ksnd_nthreads; /* # live threads */
186 int ksnd_shuttingdown; /* tell threads to exit */
187 /* schedulers information */
188 struct ksock_sched **ksnd_schedulers;
190 atomic_t ksnd_nactive_txs; /* #active txs */
192 /* conns to close: reaper_lock*/
193 struct list_head ksnd_deathrow_conns;
194 /* conns to free: reaper_lock */
195 struct list_head ksnd_zombie_conns;
196 /* conns to retry: reaper_lock*/
197 struct list_head ksnd_enomem_conns;
198 /* reaper sleeps here */
199 wait_queue_head_t ksnd_reaper_waitq;
200 /* when reaper will wake */
201 time64_t ksnd_reaper_waketime;
203 spinlock_t ksnd_reaper_lock;
205 int ksnd_enomem_tx; /* test ENOMEM sender */
206 int ksnd_stall_tx; /* test sluggish sender */
207 int ksnd_stall_rx; /* test sluggish receiver */
209 /* incoming connection requests */
210 struct list_head ksnd_connd_connreqs;
211 /* routes waiting to be connected */
212 struct list_head ksnd_connd_routes;
213 /* connds sleep here */
214 wait_queue_head_t ksnd_connd_waitq;
215 /* # connds connecting */
216 int ksnd_connd_connecting;
217 /** time stamp of the last failed connecting attempt */
218 time64_t ksnd_connd_failed_stamp;
219 /** # starting connd */
220 unsigned ksnd_connd_starting;
221 /** time stamp of the last starting connd */
222 time64_t ksnd_connd_starting_stamp;
223 /** # running connd */
224 unsigned ksnd_connd_running;
226 spinlock_t ksnd_connd_lock;
228 /* list head for freed noop tx */
229 struct list_head ksnd_idle_noop_txs;
230 /* serialise, g_lock unsafe */
231 spinlock_t ksnd_tx_lock;
234 #define SOCKNAL_INIT_NOTHING 0
235 #define SOCKNAL_INIT_DATA 1
236 #define SOCKNAL_INIT_ALL 2
238 /* A packet just assembled for transmission is represented by 1
239 * struct iovec fragment - the portals header - followed by 0
240 * or more struct bio_vec fragments.
242 * On the receive side, initially 1 struct kvec fragment is posted for
243 * receive (the header). Once the header has been received, the payload is
244 * received into struct bio_vec fragments.
246 struct ksock_conn; /* forward ref */
247 struct ksock_route; /* forward ref */
248 struct ksock_proto; /* forward ref */
250 struct ksock_tx { /* transmit packet */
251 struct list_head tx_list; /* queue on conn for transmission etc */
252 struct list_head tx_zc_list; /* queue on peer_ni for ZC request */
253 refcount_t tx_refcount; /* tx reference count */
254 int tx_nob; /* # packet bytes */
255 int tx_resid; /* residual bytes */
256 int tx_niov; /* # packet kvec frags */
257 int tx_nkiov; /* # packet page frags */
258 unsigned short tx_zc_aborted; /* aborted ZC request */
259 unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
260 unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
261 unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
262 struct bio_vec *tx_kiov; /* packet page frags */
263 struct ksock_conn *tx_conn; /* owning conn */
264 struct lnet_msg *tx_lnetmsg; /* lnet message for lnet_finalize() */
265 time64_t tx_deadline; /* when (in secs) tx times out */
266 struct ksock_msg tx_msg; /* socklnd message buffer */
267 int tx_desc_size; /* size of this descriptor */
268 enum lnet_msg_hstatus tx_hstatus; /* health status of tx */
269 struct kvec tx_hdr; /* virt hdr */
270 struct bio_vec tx_payload[0]; /* paged payload */
273 #define KSOCK_NOOP_TX_SIZE ((int)offsetof(struct ksock_tx, tx_payload[0]))
275 /* space for the rx frag descriptors; we either read a single contiguous
276 * header, or up to LNET_MAX_IOV frags of payload of either type. */
277 union ksock_rxiovspace {
278 struct kvec iov[LNET_MAX_IOV];
279 struct bio_vec kiov[LNET_MAX_IOV];
282 #define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
283 #define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
284 #define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
285 #define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
286 #define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
287 #define SOCKNAL_RX_SLOP 6 /* skipping body */
290 struct ksock_peer_ni *ksnc_peer; /* owning peer_ni */
291 struct ksock_route *ksnc_route; /* owning route */
292 struct list_head ksnc_list; /* on peer_ni's conn list */
293 struct socket *ksnc_sock; /* actual socket */
294 void *ksnc_saved_data_ready; /* socket's original
296 void *ksnc_saved_write_space; /* socket's original
297 * write_space() cb */
298 refcount_t ksnc_conn_refcount; /* conn refcount */
299 refcount_t ksnc_sock_refcount; /* sock refcount */
300 struct ksock_sched *ksnc_scheduler; /* who schedules this
302 struct sockaddr_storage ksnc_myaddr; /* my address */
303 struct sockaddr_storage ksnc_peeraddr; /* peer_ni's address */
304 signed int ksnc_type:3; /* type of connection,
307 unsigned int ksnc_closing:1; /* being shut down */
308 unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
309 unsigned int ksnc_zc_capable:1; /* enable to ZC */
310 const struct ksock_proto *ksnc_proto; /* protocol for the connection */
314 /* where I enq waiting input or a forwarding descriptor */
315 struct list_head ksnc_rx_list;
316 time64_t ksnc_rx_deadline; /* when (in seconds) receive times out */
317 __u8 ksnc_rx_started; /* started receiving a message */
318 __u8 ksnc_rx_ready; /* data ready to read */
319 __u8 ksnc_rx_scheduled;/* being progressed */
320 __u8 ksnc_rx_state; /* what is being read */
321 int ksnc_rx_nob_left; /* # bytes to next hdr/body */
322 int ksnc_rx_nob_wanted; /* bytes actually wanted */
323 int ksnc_rx_niov; /* # kvec frags */
324 struct kvec *ksnc_rx_iov; /* the kvec frags */
325 int ksnc_rx_nkiov; /* # page frags */
326 struct bio_vec *ksnc_rx_kiov; /* the page frags */
327 union ksock_rxiovspace ksnc_rx_iov_space;/* space for frag descriptors */
328 __u32 ksnc_rx_csum; /* partial checksum for incoming
330 struct lnet_msg *ksnc_lnet_msg; /* rx lnet_finalize arg*/
331 struct ksock_msg ksnc_msg; /* incoming message buffer:
332 * V2.x message takes the
334 * V1.x message is a bare
335 * struct lnet_hdr, it's stored
336 * in ksnc_msg.ksm_u.lnetmsg
339 /* where I enq waiting for output space */
340 struct list_head ksnc_tx_list;
341 /* packets waiting to be sent */
342 struct list_head ksnc_tx_queue;
343 /* next TX that can carry a LNet message or ZC-ACK */
344 struct ksock_tx *ksnc_tx_carrier;
345 /* when (in seconds) tx times out */
346 time64_t ksnc_tx_deadline;
347 /* send buffer marker */
350 atomic_t ksnc_tx_nob;
353 /* being progressed */
354 int ksnc_tx_scheduled;
355 /* time stamp of the last posted TX */
356 time64_t ksnc_tx_last_post;
360 struct list_head ksnr_list; /* chain on peer_ni route list*/
361 struct list_head ksnr_connd_list;/* chain on ksnr_connd_routes */
362 struct ksock_peer_ni *ksnr_peer; /* owning peer_ni */
363 refcount_t ksnr_refcount; /* # users */
364 time64_t ksnr_timeout; /* when (in secs) reconnection
367 time64_t ksnr_retry_interval;/* secs between retries */
368 int ksnr_myiface; /* interface index */
369 struct sockaddr_storage ksnr_addr; /* IP address to connect to */
370 unsigned int ksnr_scheduled:1;/* scheduled for attention */
371 unsigned int ksnr_connecting:1;/* connection in progress */
372 unsigned int ksnr_connected:4;/* connections by type */
373 unsigned int ksnr_deleted:1; /* been removed from peer_ni? */
374 unsigned int ksnr_share_count;/* created explicitly? */
375 int ksnr_conn_count;/* # conns for this route */
378 #define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
380 struct ksock_peer_ni {
381 struct hlist_node ksnp_list; /* stash on global peer_ni list */
382 time64_t ksnp_last_alive;/* when (in seconds) I was last alive */
383 struct lnet_process_id ksnp_id; /* who's on the other end(s) */
384 refcount_t ksnp_refcount; /* # users */
385 int ksnp_closing; /* being closed */
386 int ksnp_accepting; /* # passive connections pending */
387 int ksnp_error; /* errno on closing last conn */
388 __u64 ksnp_zc_next_cookie;/* ZC completion cookie */
389 __u64 ksnp_incarnation; /* latest known peer_ni incarnation */
390 const struct ksock_proto *ksnp_proto; /* latest known protocol */
391 struct list_head ksnp_conns; /* all active connections */
392 struct list_head ksnp_routes; /* routes */
393 struct list_head ksnp_tx_queue; /* waiting packets */
394 spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
395 /* zero copy requests wait for ACK */
396 struct list_head ksnp_zc_req_list;
397 time64_t ksnp_send_keepalive; /* time to send keepalive */
398 struct lnet_ni *ksnp_ni; /* which network */
399 int ksnp_n_passive_ips; /* # of... */
400 __u32 ksnp_passive_ips[LNET_INTERFACES_NUM]; /* preferred local interfaces */
403 struct ksock_connreq {
404 /* stash on ksnd_connd_connreqs */
405 struct list_head ksncr_list;
407 struct lnet_ni *ksncr_ni;
408 /* accepted socket */
409 struct socket *ksncr_sock;
412 extern struct ksock_nal_data ksocknal_data;
413 extern struct ksock_tunables ksocknal_tunables;
415 #define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
416 #define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
417 #define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
420 int pro_version; /* version number of protocol */
421 int (*pro_send_hello)(struct ksock_conn *, struct ksock_hello_msg *); /* handshake function */
422 int (*pro_recv_hello)(struct ksock_conn *, struct ksock_hello_msg *, int);/* handshake function */
423 void (*pro_pack)(struct ksock_tx *); /* message pack */
424 void (*pro_unpack)(struct ksock_msg *); /* message unpack */
425 struct ksock_tx *(*pro_queue_tx_msg)(struct ksock_conn *, struct ksock_tx *); /* queue tx on the connection */
426 int (*pro_queue_tx_zcack)(struct ksock_conn *, struct ksock_tx *, __u64); /* queue ZC ack on the connection */
427 int (*pro_handle_zcreq)(struct ksock_conn *, __u64, int); /* handle ZC request */
428 int (*pro_handle_zcack)(struct ksock_conn *, __u64, __u64); /* handle ZC ACK */
429 int (*pro_match_tx)(struct ksock_conn *, struct ksock_tx *, int); /* msg type matches the connection type:
431 * return MATCH_NO : no
432 * return MATCH_YES : matching type
433 * return MATCH_MAY : can be backup */
436 extern const struct ksock_proto ksocknal_protocol_v1x;
437 extern const struct ksock_proto ksocknal_protocol_v2x;
438 extern const struct ksock_proto ksocknal_protocol_v3x;
440 #define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
441 #define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
442 #define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
444 #ifndef CPU_MASK_NONE
445 #define CPU_MASK_NONE 0UL
448 static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
451 return crc32_le(crc, p, len);
454 crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
461 ksocknal_route_mask(void)
463 if (!*ksocknal_tunables.ksnd_typed_conns)
464 return BIT(SOCKLND_CONN_ANY);
466 return (BIT(SOCKLND_CONN_CONTROL) |
467 BIT(SOCKLND_CONN_BULK_IN) |
468 BIT(SOCKLND_CONN_BULK_OUT));
472 ksocknal_conn_addref(struct ksock_conn *conn)
474 refcount_inc(&conn->ksnc_conn_refcount);
477 extern void ksocknal_queue_zombie_conn(struct ksock_conn *conn);
478 extern void ksocknal_finalize_zcreq(struct ksock_conn *conn);
481 ksocknal_conn_decref(struct ksock_conn *conn)
483 if (refcount_dec_and_test(&conn->ksnc_conn_refcount))
484 ksocknal_queue_zombie_conn(conn);
488 ksocknal_connsock_addref(struct ksock_conn *conn)
492 read_lock(&ksocknal_data.ksnd_global_lock);
493 if (!conn->ksnc_closing) {
494 refcount_inc(&conn->ksnc_sock_refcount);
497 read_unlock(&ksocknal_data.ksnd_global_lock);
503 ksocknal_connsock_decref(struct ksock_conn *conn)
505 if (refcount_dec_and_test(&conn->ksnc_sock_refcount)) {
506 LASSERT (conn->ksnc_closing);
507 sock_release(conn->ksnc_sock);
508 conn->ksnc_sock = NULL;
509 ksocknal_finalize_zcreq(conn);
514 ksocknal_tx_addref(struct ksock_tx *tx)
516 refcount_inc(&tx->tx_refcount);
519 extern void ksocknal_tx_prep(struct ksock_conn *, struct ksock_tx *tx);
520 extern void ksocknal_tx_done(struct lnet_ni *ni, struct ksock_tx *tx, int error);
523 ksocknal_tx_decref(struct ksock_tx *tx)
525 if (refcount_dec_and_test(&tx->tx_refcount))
526 ksocknal_tx_done(NULL, tx, 0);
530 ksocknal_route_addref(struct ksock_route *route)
532 refcount_inc(&route->ksnr_refcount);
535 extern void ksocknal_destroy_route(struct ksock_route *route);
538 ksocknal_route_decref(struct ksock_route *route)
540 if (refcount_dec_and_test(&route->ksnr_refcount))
541 ksocknal_destroy_route (route);
545 ksocknal_peer_addref(struct ksock_peer_ni *peer_ni)
547 refcount_inc(&peer_ni->ksnp_refcount);
550 extern void ksocknal_destroy_peer(struct ksock_peer_ni *peer_ni);
553 ksocknal_peer_decref(struct ksock_peer_ni *peer_ni)
555 if (refcount_dec_and_test(&peer_ni->ksnp_refcount))
556 ksocknal_destroy_peer(peer_ni);
559 static inline int ksocknal_timeout(void)
561 return *ksocknal_tunables.ksnd_timeout ?
562 *ksocknal_tunables.ksnd_timeout :
563 lnet_get_lnd_timeout();
566 int ksocknal_startup(struct lnet_ni *ni);
567 void ksocknal_shutdown(struct lnet_ni *ni);
568 int ksocknal_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg);
569 int ksocknal_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg);
570 int ksocknal_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
571 int delayed, unsigned int niov,
572 struct bio_vec *kiov,
573 unsigned int offset, unsigned int mlen, unsigned int rlen);
574 int ksocknal_accept(struct lnet_ni *ni, struct socket *sock);
576 int ksocknal_add_peer(struct lnet_ni *ni, struct lnet_process_id id, __u32 ip,
578 struct ksock_peer_ni *ksocknal_find_peer_locked(struct lnet_ni *ni,
579 struct lnet_process_id id);
580 struct ksock_peer_ni *ksocknal_find_peer(struct lnet_ni *ni,
581 struct lnet_process_id id);
582 extern void ksocknal_peer_failed(struct ksock_peer_ni *peer_ni);
583 extern int ksocknal_create_conn(struct lnet_ni *ni, struct ksock_route *route,
584 struct socket *sock, int type);
585 extern void ksocknal_close_conn_locked(struct ksock_conn *conn, int why);
586 extern void ksocknal_terminate_conn(struct ksock_conn *conn);
587 extern void ksocknal_destroy_conn(struct ksock_conn *conn);
588 extern int ksocknal_close_peer_conns_locked(struct ksock_peer_ni *peer_ni,
589 struct sockaddr *peer, int why);
590 extern int ksocknal_close_conn_and_siblings(struct ksock_conn *conn, int why);
591 int ksocknal_close_matching_conns(struct lnet_process_id id, __u32 ipaddr);
592 extern struct ksock_conn *ksocknal_find_conn_locked(struct ksock_peer_ni *peer_ni,
593 struct ksock_tx *tx, int nonblk);
595 extern int ksocknal_launch_packet(struct lnet_ni *ni, struct ksock_tx *tx,
596 struct lnet_process_id id);
597 extern struct ksock_tx *ksocknal_alloc_tx(int type, int size);
598 extern void ksocknal_free_tx(struct ksock_tx *tx);
599 extern struct ksock_tx *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
600 extern void ksocknal_next_tx_carrier(struct ksock_conn *conn);
601 extern void ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn);
602 extern void ksocknal_txlist_done(struct lnet_ni *ni, struct list_head *txlist,
604 extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
605 extern void ksocknal_thread_fini(void);
606 extern void ksocknal_launch_all_connections_locked(struct ksock_peer_ni *peer_ni);
607 extern struct ksock_route *ksocknal_find_connectable_route_locked(struct ksock_peer_ni *peer_ni);
608 extern struct ksock_route *ksocknal_find_connecting_route_locked(struct ksock_peer_ni *peer_ni);
609 extern int ksocknal_new_packet(struct ksock_conn *conn, int skip);
610 extern int ksocknal_scheduler(void *arg);
611 extern int ksocknal_connd(void *arg);
612 extern int ksocknal_reaper(void *arg);
613 int ksocknal_send_hello(struct lnet_ni *ni, struct ksock_conn *conn,
614 lnet_nid_t peer_nid, struct ksock_hello_msg *hello);
615 int ksocknal_recv_hello(struct lnet_ni *ni, struct ksock_conn *conn,
616 struct ksock_hello_msg *hello,
617 struct lnet_process_id *id,
619 extern void ksocknal_read_callback(struct ksock_conn *conn);
620 extern void ksocknal_write_callback(struct ksock_conn *conn);
622 extern int ksocknal_lib_zc_capable(struct ksock_conn *conn);
623 extern void ksocknal_lib_save_callback(struct socket *sock, struct ksock_conn *conn);
624 extern void ksocknal_lib_set_callback(struct socket *sock, struct ksock_conn *conn);
625 extern void ksocknal_lib_reset_callback(struct socket *sock,
626 struct ksock_conn *conn);
627 extern void ksocknal_lib_push_conn(struct ksock_conn *conn);
628 extern int ksocknal_lib_get_conn_addrs(struct ksock_conn *conn);
629 extern int ksocknal_lib_setup_sock(struct socket *so);
630 extern int ksocknal_lib_send_hdr(struct ksock_conn *conn, struct ksock_tx *tx,
631 struct kvec *scratch_iov);
632 extern int ksocknal_lib_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx,
633 struct kvec *scratch_iov);
634 extern void ksocknal_lib_eager_ack(struct ksock_conn *conn);
635 extern int ksocknal_lib_recv_iov(struct ksock_conn *conn,
636 struct kvec *scratchiov);
637 extern int ksocknal_lib_recv_kiov(struct ksock_conn *conn, struct page **pages,
638 struct kvec *scratchiov);
639 extern int ksocknal_lib_get_conn_tunables(struct ksock_conn *conn, int *txmem,
640 int *rxmem, int *nagle);
642 extern int ksocknal_tunables_init(void);
644 extern void ksocknal_lib_csum_tx(struct ksock_tx *tx);
646 extern int ksocknal_lib_memory_pressure(struct ksock_conn *conn);
648 #endif /* _SOCKLND_SOCKLND_H_ */