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 #include <libcfs/linux/linux-net.h>
61 #ifndef NETIF_F_CSUM_MASK
62 # define NETIF_F_CSUM_MASK NETIF_F_ALL_CSUM
65 /* assume one thread for each connection type */
66 #define SOCKNAL_NSCHEDS 3
67 #define SOCKNAL_NSCHEDS_HIGH (SOCKNAL_NSCHEDS << 1)
69 #define SOCKNAL_PEER_HASH_BITS 7 /* log2 of # peer_ni lists */
70 #define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */
71 #define SOCKNAL_ENOMEM_RETRY 1 /* seconds between retries */
73 #define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
74 #define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
76 #define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
78 /* risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
79 * no risk if we're not running on a CONFIG_HIGHMEM platform. */
81 # define SOCKNAL_RISK_KMAP_DEADLOCK 0
83 # define SOCKNAL_RISK_KMAP_DEADLOCK 1
86 /* per scheduler state */
90 /* conn waiting to be written */
91 struct list_head kss_rx_conns;
92 struct list_head kss_tx_conns;
93 /* zombie noop tx list */
94 struct list_head kss_zombie_noop_txs;
95 /* where scheduler sleeps */
96 wait_queue_head_t kss_waitq;
97 /* # connections assigned to this scheduler */
99 /* max allowed threads */
100 int kss_nthreads_max;
101 /* number of threads */
107 #define KSOCK_CPT_SHIFT 16
108 #define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
109 #define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
110 #define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
112 struct ksock_interface { /* in-use interface */
113 int ksni_index; /* Linux interface index */
114 struct sockaddr_storage ksni_addr; /* interface's address */
115 __u32 ksni_netmask; /* interface's network mask */
116 int ksni_nroutes; /* # routes using (active) */
117 int ksni_npeers; /* # peers using (passive) */
118 char ksni_name[IFNAMSIZ]; /* interface name */
121 struct ksock_tunables {
122 /* "stuck" socket timeout (seconds) */
124 /* # scheduler threads in each pool while starting */
126 int *ksnd_nconnds; /* # connection daemons */
127 int *ksnd_nconnds_max; /* max # connection daemons */
128 int *ksnd_min_reconnectms; /* first connection retry after (ms)... */
129 int *ksnd_max_reconnectms; /* ...exponentially increasing to this */
130 int *ksnd_eager_ack; /* make TCP ack eagerly? */
131 int *ksnd_typed_conns; /* drive sockets by type? */
132 int *ksnd_min_bulk; /* smallest "large" message */
133 int *ksnd_tx_buffer_size; /* socket tx buffer size */
134 int *ksnd_rx_buffer_size; /* socket rx buffer size */
135 int *ksnd_nagle; /* enable NAGLE? */
136 int *ksnd_round_robin; /* round robin for multiple interfaces */
137 int *ksnd_keepalive; /* # secs for sending keepalive NOOP */
138 int *ksnd_keepalive_idle; /* # idle secs before 1st probe */
139 int *ksnd_keepalive_count; /* # probes */
140 int *ksnd_keepalive_intvl; /* time between probes */
141 int *ksnd_credits; /* # concurrent sends */
142 int *ksnd_peertxcredits; /* # concurrent sends to 1 peer_ni */
143 int *ksnd_peerrtrcredits; /* # per-peer_ni router buffer credits */
144 int *ksnd_peertimeout; /* seconds to consider peer_ni dead */
145 int *ksnd_enable_csum; /* enable check sum */
146 int *ksnd_inject_csum_error; /* set non-zero to inject checksum error */
147 int *ksnd_nonblk_zcack; /* always send zc-ack on non-blocking connection */
148 unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload size */
149 int *ksnd_zc_recv; /* enable ZC receive (for Chelsio TOE) */
150 int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to enable ZC receive */
151 int *ksnd_irq_affinity; /* enable IRQ affinity? */
152 #ifdef SOCKNAL_BACKOFF
153 int *ksnd_backoff_init; /* initial TCP backoff */
154 int *ksnd_backoff_max; /* maximum TCP backoff */
156 #if SOCKNAL_VERSION_DEBUG
157 int *ksnd_protocol; /* protocol version */
162 __u64 ksnn_incarnation; /* my epoch */
163 struct list_head ksnn_list; /* chain on global list */
164 atomic_t ksnn_npeers; /* # peers */
165 struct ksock_interface ksnn_interface; /* IP interface */
167 /* When the ksock_net is shut down, this (negative) bias is added to
168 * ksnn_npeers, which prevents new peers from being added.
170 #define SOCKNAL_SHUTDOWN_BIAS (INT_MIN+1)
173 #define SOCKNAL_CONND_TIMEOUT 120
174 /** reserved thread for accepting & creating new connd */
175 #define SOCKNAL_CONND_RESV 1
177 struct ksock_nal_data {
178 int ksnd_init; /* initialisation state */
179 int ksnd_nnets; /* # networks set up */
180 struct list_head ksnd_nets; /* list of nets */
181 /* stabilize peer_ni/conn ops */
182 rwlock_t ksnd_global_lock;
183 /* hash table of all my known peers */
184 DECLARE_HASHTABLE(ksnd_peers, SOCKNAL_PEER_HASH_BITS);
186 atomic_t ksnd_nthreads; /* # live threads */
187 int ksnd_shuttingdown; /* tell threads to exit */
188 /* schedulers information */
189 struct ksock_sched **ksnd_schedulers;
191 atomic_t ksnd_nactive_txs; /* #active txs */
193 /* conns to close: reaper_lock*/
194 struct list_head ksnd_deathrow_conns;
195 /* conns to free: reaper_lock */
196 struct list_head ksnd_zombie_conns;
197 /* conns to retry: reaper_lock*/
198 struct list_head ksnd_enomem_conns;
199 /* reaper sleeps here */
200 wait_queue_head_t ksnd_reaper_waitq;
201 /* when reaper will wake */
202 time64_t ksnd_reaper_waketime;
204 spinlock_t ksnd_reaper_lock;
206 int ksnd_enomem_tx; /* test ENOMEM sender */
207 int ksnd_stall_tx; /* test sluggish sender */
208 int ksnd_stall_rx; /* test sluggish receiver */
210 /* incoming connection requests */
211 struct list_head ksnd_connd_connreqs;
212 /* routes waiting to be connected */
213 struct list_head ksnd_connd_routes;
214 /* connds sleep here */
215 wait_queue_head_t ksnd_connd_waitq;
216 /* # connds connecting */
217 int ksnd_connd_connecting;
218 /** time stamp of the last failed connecting attempt */
219 time64_t ksnd_connd_failed_stamp;
220 /** # starting connd */
221 unsigned ksnd_connd_starting;
222 /** time stamp of the last starting connd */
223 time64_t ksnd_connd_starting_stamp;
224 /** # running connd */
225 unsigned ksnd_connd_running;
227 spinlock_t ksnd_connd_lock;
229 /* list head for freed noop tx */
230 struct list_head ksnd_idle_noop_txs;
231 /* serialise, g_lock unsafe */
232 spinlock_t ksnd_tx_lock;
235 #define SOCKNAL_INIT_NOTHING 0
236 #define SOCKNAL_INIT_DATA 1
237 #define SOCKNAL_INIT_ALL 2
239 /* A packet just assembled for transmission is represented by 1
240 * struct iovec fragment - the portals header - followed by 0
241 * or more struct bio_vec fragments.
243 * On the receive side, initially 1 struct kvec fragment is posted for
244 * receive (the header). Once the header has been received, the payload is
245 * received into struct bio_vec fragments.
247 struct ksock_conn; /* forward ref */
248 struct ksock_route; /* forward ref */
249 struct ksock_proto; /* forward ref */
251 struct ksock_tx { /* transmit packet */
252 struct list_head tx_list; /* queue on conn for transmission etc */
253 struct list_head tx_zc_list; /* queue on peer_ni for ZC request */
254 refcount_t tx_refcount; /* tx reference count */
255 int tx_nob; /* # packet bytes */
256 int tx_resid; /* residual bytes */
257 int tx_niov; /* # packet kvec frags */
258 int tx_nkiov; /* # packet page frags */
259 unsigned short tx_zc_aborted; /* aborted ZC request */
260 unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
261 unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
262 unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
263 struct bio_vec *tx_kiov; /* packet page frags */
264 struct ksock_conn *tx_conn; /* owning conn */
265 struct lnet_msg *tx_lnetmsg; /* lnet message for lnet_finalize() */
266 time64_t tx_deadline; /* when (in secs) tx times out */
267 struct ksock_msg tx_msg; /* socklnd message buffer */
268 int tx_desc_size; /* size of this descriptor */
269 enum lnet_msg_hstatus tx_hstatus; /* health status of tx */
270 struct kvec tx_hdr; /* virt hdr */
271 struct bio_vec tx_payload[0]; /* paged payload */
274 #define KSOCK_NOOP_TX_SIZE ((int)offsetof(struct ksock_tx, tx_payload[0]))
276 /* space for the rx frag descriptors; we either read a single contiguous
277 * header, or up to LNET_MAX_IOV frags of payload of either type. */
278 union ksock_rxiovspace {
279 struct kvec iov[LNET_MAX_IOV];
280 struct bio_vec kiov[LNET_MAX_IOV];
283 #define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
284 #define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
285 #define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
286 #define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
287 #define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
288 #define SOCKNAL_RX_SLOP 6 /* skipping body */
291 struct ksock_peer_ni *ksnc_peer; /* owning peer_ni */
292 struct ksock_route *ksnc_route; /* owning route */
293 struct list_head ksnc_list; /* on peer_ni's conn list */
294 struct socket *ksnc_sock; /* actual socket */
295 void *ksnc_saved_data_ready; /* socket's original
297 void *ksnc_saved_write_space; /* socket's original
298 * write_space() cb */
299 refcount_t ksnc_conn_refcount; /* conn refcount */
300 refcount_t ksnc_sock_refcount; /* sock refcount */
301 struct ksock_sched *ksnc_scheduler; /* who schedules this
303 struct sockaddr_storage ksnc_myaddr; /* my address */
304 struct sockaddr_storage ksnc_peeraddr; /* peer_ni's address */
305 signed int ksnc_type:3; /* type of connection,
308 unsigned int ksnc_closing:1; /* being shut down */
309 unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
310 unsigned int ksnc_zc_capable:1; /* enable to ZC */
311 const struct ksock_proto *ksnc_proto; /* protocol for the connection */
315 /* where I enq waiting input or a forwarding descriptor */
316 struct list_head ksnc_rx_list;
317 time64_t ksnc_rx_deadline; /* when (in seconds) receive times out */
318 __u8 ksnc_rx_started; /* started receiving a message */
319 __u8 ksnc_rx_ready; /* data ready to read */
320 __u8 ksnc_rx_scheduled;/* being progressed */
321 __u8 ksnc_rx_state; /* what is being read */
322 int ksnc_rx_nob_left; /* # bytes to next hdr/body */
323 int ksnc_rx_nob_wanted; /* bytes actually wanted */
324 int ksnc_rx_niov; /* # kvec frags */
325 struct kvec *ksnc_rx_iov; /* the kvec frags */
326 int ksnc_rx_nkiov; /* # page frags */
327 struct bio_vec *ksnc_rx_kiov; /* the page frags */
328 union ksock_rxiovspace ksnc_rx_iov_space;/* space for frag descriptors */
329 __u32 ksnc_rx_csum; /* partial checksum for incoming
331 struct lnet_msg *ksnc_lnet_msg; /* rx lnet_finalize arg*/
332 struct ksock_msg ksnc_msg; /* incoming message buffer:
333 * V2.x message takes the
335 * V1.x message is a bare
336 * struct lnet_hdr, it's stored
337 * in ksnc_msg.ksm_u.lnetmsg
340 /* where I enq waiting for output space */
341 struct list_head ksnc_tx_list;
342 /* packets waiting to be sent */
343 struct list_head ksnc_tx_queue;
344 /* next TX that can carry a LNet message or ZC-ACK */
345 struct ksock_tx *ksnc_tx_carrier;
346 /* when (in seconds) tx times out */
347 time64_t ksnc_tx_deadline;
348 /* send buffer marker */
351 atomic_t ksnc_tx_nob;
354 /* being progressed */
355 int ksnc_tx_scheduled;
356 /* time stamp of the last posted TX */
357 time64_t ksnc_tx_last_post;
361 struct list_head ksnr_list; /* chain on peer_ni route list*/
362 struct list_head ksnr_connd_list;/* chain on ksnr_connd_routes */
363 struct ksock_peer_ni *ksnr_peer; /* owning peer_ni */
364 refcount_t ksnr_refcount; /* # users */
365 time64_t ksnr_timeout; /* when (in secs) reconnection
368 time64_t ksnr_retry_interval;/* secs between retries */
369 int ksnr_myiface; /* interface index */
370 struct sockaddr_storage ksnr_addr; /* IP address to connect to */
371 unsigned int ksnr_scheduled:1;/* scheduled for attention */
372 unsigned int ksnr_connecting:1;/* connection in progress */
373 unsigned int ksnr_connected:4;/* connections by type */
374 unsigned int ksnr_deleted:1; /* been removed from peer_ni? */
375 unsigned int ksnr_share_count;/* created explicitly? */
376 int ksnr_conn_count;/* # conns for this route */
379 #define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
381 struct ksock_peer_ni {
382 struct hlist_node ksnp_list; /* stash on global peer_ni list */
383 time64_t ksnp_last_alive;/* when (in seconds) I was last alive */
384 struct lnet_process_id ksnp_id; /* who's on the other end(s) */
385 refcount_t ksnp_refcount; /* # users */
386 int ksnp_closing; /* being closed */
387 int ksnp_accepting; /* # passive connections pending */
388 int ksnp_error; /* errno on closing last conn */
389 __u64 ksnp_zc_next_cookie;/* ZC completion cookie */
390 __u64 ksnp_incarnation; /* latest known peer_ni incarnation */
391 const struct ksock_proto *ksnp_proto; /* latest known protocol */
392 struct list_head ksnp_conns; /* all active connections */
393 struct list_head ksnp_routes; /* routes */
394 struct list_head ksnp_tx_queue; /* waiting packets */
395 spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
396 /* zero copy requests wait for ACK */
397 struct list_head ksnp_zc_req_list;
398 time64_t ksnp_send_keepalive; /* time to send keepalive */
399 struct lnet_ni *ksnp_ni; /* which network */
400 int ksnp_n_passive_ips; /* # of... */
401 __u32 ksnp_passive_ips[LNET_INTERFACES_NUM]; /* preferred local interfaces */
404 struct ksock_connreq {
405 /* stash on ksnd_connd_connreqs */
406 struct list_head ksncr_list;
408 struct lnet_ni *ksncr_ni;
409 /* accepted socket */
410 struct socket *ksncr_sock;
413 extern struct ksock_nal_data ksocknal_data;
414 extern struct ksock_tunables ksocknal_tunables;
416 #define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
417 #define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
418 #define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
421 int pro_version; /* version number of protocol */
422 int (*pro_send_hello)(struct ksock_conn *, struct ksock_hello_msg *); /* handshake function */
423 int (*pro_recv_hello)(struct ksock_conn *, struct ksock_hello_msg *, int);/* handshake function */
424 void (*pro_pack)(struct ksock_tx *); /* message pack */
425 void (*pro_unpack)(struct ksock_msg *); /* message unpack */
426 struct ksock_tx *(*pro_queue_tx_msg)(struct ksock_conn *, struct ksock_tx *); /* queue tx on the connection */
427 int (*pro_queue_tx_zcack)(struct ksock_conn *, struct ksock_tx *, __u64); /* queue ZC ack on the connection */
428 int (*pro_handle_zcreq)(struct ksock_conn *, __u64, int); /* handle ZC request */
429 int (*pro_handle_zcack)(struct ksock_conn *, __u64, __u64); /* handle ZC ACK */
430 int (*pro_match_tx)(struct ksock_conn *, struct ksock_tx *, int); /* msg type matches the connection type:
432 * return MATCH_NO : no
433 * return MATCH_YES : matching type
434 * return MATCH_MAY : can be backup */
437 extern const struct ksock_proto ksocknal_protocol_v1x;
438 extern const struct ksock_proto ksocknal_protocol_v2x;
439 extern const struct ksock_proto ksocknal_protocol_v3x;
441 #define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
442 #define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
443 #define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
445 #ifndef CPU_MASK_NONE
446 #define CPU_MASK_NONE 0UL
449 static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
452 return crc32_le(crc, p, len);
455 crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
462 ksocknal_route_mask(void)
464 if (!*ksocknal_tunables.ksnd_typed_conns)
465 return BIT(SOCKLND_CONN_ANY);
467 return (BIT(SOCKLND_CONN_CONTROL) |
468 BIT(SOCKLND_CONN_BULK_IN) |
469 BIT(SOCKLND_CONN_BULK_OUT));
473 ksocknal_conn_addref(struct ksock_conn *conn)
475 refcount_inc(&conn->ksnc_conn_refcount);
478 extern void ksocknal_queue_zombie_conn(struct ksock_conn *conn);
479 extern void ksocknal_finalize_zcreq(struct ksock_conn *conn);
482 ksocknal_conn_decref(struct ksock_conn *conn)
484 if (refcount_dec_and_test(&conn->ksnc_conn_refcount))
485 ksocknal_queue_zombie_conn(conn);
489 ksocknal_connsock_addref(struct ksock_conn *conn)
493 read_lock(&ksocknal_data.ksnd_global_lock);
494 if (!conn->ksnc_closing) {
495 refcount_inc(&conn->ksnc_sock_refcount);
498 read_unlock(&ksocknal_data.ksnd_global_lock);
504 ksocknal_connsock_decref(struct ksock_conn *conn)
506 if (refcount_dec_and_test(&conn->ksnc_sock_refcount)) {
507 LASSERT (conn->ksnc_closing);
508 sock_release(conn->ksnc_sock);
509 conn->ksnc_sock = NULL;
510 ksocknal_finalize_zcreq(conn);
515 ksocknal_tx_addref(struct ksock_tx *tx)
517 refcount_inc(&tx->tx_refcount);
520 extern void ksocknal_tx_prep(struct ksock_conn *, struct ksock_tx *tx);
521 extern void ksocknal_tx_done(struct lnet_ni *ni, struct ksock_tx *tx, int error);
524 ksocknal_tx_decref(struct ksock_tx *tx)
526 if (refcount_dec_and_test(&tx->tx_refcount))
527 ksocknal_tx_done(NULL, tx, 0);
531 ksocknal_route_addref(struct ksock_route *route)
533 refcount_inc(&route->ksnr_refcount);
536 extern void ksocknal_destroy_route(struct ksock_route *route);
539 ksocknal_route_decref(struct ksock_route *route)
541 if (refcount_dec_and_test(&route->ksnr_refcount))
542 ksocknal_destroy_route (route);
546 ksocknal_peer_addref(struct ksock_peer_ni *peer_ni)
548 refcount_inc(&peer_ni->ksnp_refcount);
551 extern void ksocknal_destroy_peer(struct ksock_peer_ni *peer_ni);
554 ksocknal_peer_decref(struct ksock_peer_ni *peer_ni)
556 if (refcount_dec_and_test(&peer_ni->ksnp_refcount))
557 ksocknal_destroy_peer(peer_ni);
560 static inline int ksocknal_timeout(void)
562 return *ksocknal_tunables.ksnd_timeout ?
563 *ksocknal_tunables.ksnd_timeout :
564 lnet_get_lnd_timeout();
567 int ksocknal_startup(struct lnet_ni *ni);
568 void ksocknal_shutdown(struct lnet_ni *ni);
569 int ksocknal_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg);
570 int ksocknal_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg);
571 int ksocknal_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
572 int delayed, unsigned int niov,
573 struct bio_vec *kiov,
574 unsigned int offset, unsigned int mlen, unsigned int rlen);
575 int ksocknal_accept(struct lnet_ni *ni, struct socket *sock);
577 int ksocknal_add_peer(struct lnet_ni *ni, struct lnet_process_id id,
578 struct sockaddr *addr);
579 struct ksock_peer_ni *ksocknal_find_peer_locked(struct lnet_ni *ni,
580 struct lnet_process_id id);
581 struct ksock_peer_ni *ksocknal_find_peer(struct lnet_ni *ni,
582 struct lnet_process_id id);
583 extern void ksocknal_peer_failed(struct ksock_peer_ni *peer_ni);
584 extern int ksocknal_create_conn(struct lnet_ni *ni, struct ksock_route *route,
585 struct socket *sock, int type);
586 extern void ksocknal_close_conn_locked(struct ksock_conn *conn, int why);
587 extern void ksocknal_terminate_conn(struct ksock_conn *conn);
588 extern void ksocknal_destroy_conn(struct ksock_conn *conn);
589 extern int ksocknal_close_peer_conns_locked(struct ksock_peer_ni *peer_ni,
590 struct sockaddr *peer, int why);
591 extern int ksocknal_close_conn_and_siblings(struct ksock_conn *conn, int why);
592 int ksocknal_close_matching_conns(struct lnet_process_id id, __u32 ipaddr);
593 extern struct ksock_conn *ksocknal_find_conn_locked(struct ksock_peer_ni *peer_ni,
594 struct ksock_tx *tx, int nonblk);
596 extern int ksocknal_launch_packet(struct lnet_ni *ni, struct ksock_tx *tx,
597 struct lnet_process_id id);
598 extern struct ksock_tx *ksocknal_alloc_tx(int type, int size);
599 extern void ksocknal_free_tx(struct ksock_tx *tx);
600 extern struct ksock_tx *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
601 extern void ksocknal_next_tx_carrier(struct ksock_conn *conn);
602 extern void ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn);
603 extern void ksocknal_txlist_done(struct lnet_ni *ni, struct list_head *txlist,
605 extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
606 extern void ksocknal_thread_fini(void);
607 extern void ksocknal_launch_all_connections_locked(struct ksock_peer_ni *peer_ni);
608 extern struct ksock_route *ksocknal_find_connectable_route_locked(struct ksock_peer_ni *peer_ni);
609 extern struct ksock_route *ksocknal_find_connecting_route_locked(struct ksock_peer_ni *peer_ni);
610 extern int ksocknal_new_packet(struct ksock_conn *conn, int skip);
611 extern int ksocknal_scheduler(void *arg);
612 extern int ksocknal_connd(void *arg);
613 extern int ksocknal_reaper(void *arg);
614 int ksocknal_send_hello(struct lnet_ni *ni, struct ksock_conn *conn,
615 lnet_nid_t peer_nid, struct ksock_hello_msg *hello);
616 int ksocknal_recv_hello(struct lnet_ni *ni, struct ksock_conn *conn,
617 struct ksock_hello_msg *hello,
618 struct lnet_process_id *id,
620 extern void ksocknal_read_callback(struct ksock_conn *conn);
621 extern void ksocknal_write_callback(struct ksock_conn *conn);
623 extern int ksocknal_lib_zc_capable(struct ksock_conn *conn);
624 extern void ksocknal_lib_save_callback(struct socket *sock, struct ksock_conn *conn);
625 extern void ksocknal_lib_set_callback(struct socket *sock, struct ksock_conn *conn);
626 extern void ksocknal_lib_reset_callback(struct socket *sock,
627 struct ksock_conn *conn);
628 extern void ksocknal_lib_push_conn(struct ksock_conn *conn);
629 extern int ksocknal_lib_get_conn_addrs(struct ksock_conn *conn);
630 extern int ksocknal_lib_setup_sock(struct socket *so);
631 extern int ksocknal_lib_send_hdr(struct ksock_conn *conn, struct ksock_tx *tx,
632 struct kvec *scratch_iov);
633 extern int ksocknal_lib_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx,
634 struct kvec *scratch_iov);
635 extern void ksocknal_lib_eager_ack(struct ksock_conn *conn);
636 extern int ksocknal_lib_recv_iov(struct ksock_conn *conn,
637 struct kvec *scratchiov);
638 extern int ksocknal_lib_recv_kiov(struct ksock_conn *conn, struct page **pages,
639 struct kvec *scratchiov);
640 extern int ksocknal_lib_get_conn_tunables(struct ksock_conn *conn, int *txmem,
641 int *rxmem, int *nagle);
643 extern int ksocknal_tunables_init(void);
645 extern void ksocknal_lib_csum_tx(struct ksock_tx *tx);
647 extern int ksocknal_lib_memory_pressure(struct ksock_conn *conn);
649 #endif /* _SOCKLND_SOCKLND_H_ */