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 */
159 int *ksnd_conns_per_peer; /* for typed mode, yields:
160 * 1 + 2*conns_per_peer total
162 * conns_per_peer total
167 __u64 ksnn_incarnation; /* my epoch */
168 struct list_head ksnn_list; /* chain on global list */
169 atomic_t ksnn_npeers; /* # peers */
170 struct ksock_interface ksnn_interface; /* IP interface */
172 /* When the ksock_net is shut down, this (negative) bias is added to
173 * ksnn_npeers, which prevents new peers from being added.
175 #define SOCKNAL_SHUTDOWN_BIAS (INT_MIN+1)
178 #define SOCKNAL_CONND_TIMEOUT 120
179 /** reserved thread for accepting & creating new connd */
180 #define SOCKNAL_CONND_RESV 1
182 struct ksock_nal_data {
183 int ksnd_init; /* initialisation state */
184 int ksnd_nnets; /* # networks set up */
185 struct list_head ksnd_nets; /* list of nets */
186 /* stabilize peer_ni/conn ops */
187 rwlock_t ksnd_global_lock;
188 /* hash table of all my known peers */
189 DECLARE_HASHTABLE(ksnd_peers, SOCKNAL_PEER_HASH_BITS);
191 atomic_t ksnd_nthreads; /* # live threads */
192 int ksnd_shuttingdown; /* tell threads to exit */
193 /* schedulers information */
194 struct ksock_sched **ksnd_schedulers;
196 atomic_t ksnd_nactive_txs; /* #active txs */
198 /* conns to close: reaper_lock*/
199 struct list_head ksnd_deathrow_conns;
200 /* conns to free: reaper_lock */
201 struct list_head ksnd_zombie_conns;
202 /* conns to retry: reaper_lock*/
203 struct list_head ksnd_enomem_conns;
204 /* reaper sleeps here */
205 wait_queue_head_t ksnd_reaper_waitq;
206 /* when reaper will wake */
207 time64_t ksnd_reaper_waketime;
209 spinlock_t ksnd_reaper_lock;
211 int ksnd_enomem_tx; /* test ENOMEM sender */
212 int ksnd_stall_tx; /* test sluggish sender */
213 int ksnd_stall_rx; /* test sluggish receiver */
215 /* incoming connection requests */
216 struct list_head ksnd_connd_connreqs;
217 /* routes waiting to be connected */
218 struct list_head ksnd_connd_routes;
219 /* connds sleep here */
220 wait_queue_head_t ksnd_connd_waitq;
221 /* # connds connecting */
222 int ksnd_connd_connecting;
223 /** time stamp of the last failed connecting attempt */
224 time64_t ksnd_connd_failed_stamp;
225 /** # starting connd */
226 unsigned ksnd_connd_starting;
227 /** time stamp of the last starting connd */
228 time64_t ksnd_connd_starting_stamp;
229 /** # running connd */
230 unsigned ksnd_connd_running;
232 spinlock_t ksnd_connd_lock;
234 /* list head for freed noop tx */
235 struct list_head ksnd_idle_noop_txs;
236 /* serialise, g_lock unsafe */
237 spinlock_t ksnd_tx_lock;
240 #define SOCKNAL_INIT_NOTHING 0
241 #define SOCKNAL_INIT_DATA 1
242 #define SOCKNAL_INIT_ALL 2
244 /* A packet just assembled for transmission is represented by 1
245 * struct iovec fragment - the portals header - followed by 0
246 * or more struct bio_vec fragments.
248 * On the receive side, initially 1 struct kvec fragment is posted for
249 * receive (the header). Once the header has been received, the payload is
250 * received into struct bio_vec fragments.
252 struct ksock_conn; /* forward ref */
253 struct ksock_conn_cb; /* forward ref */
254 struct ksock_proto; /* forward ref */
256 struct ksock_tx { /* transmit packet */
257 struct list_head tx_list; /* queue on conn for transmission etc */
258 struct list_head tx_zc_list; /* queue on peer_ni for ZC request */
259 refcount_t tx_refcount; /* tx reference count */
260 int tx_nob; /* # packet bytes */
261 int tx_resid; /* residual bytes */
262 int tx_niov; /* # packet kvec frags */
263 int tx_nkiov; /* # packet page frags */
264 unsigned short tx_zc_aborted; /* aborted ZC request */
265 unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
266 unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
267 unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
268 struct bio_vec *tx_kiov; /* packet page frags */
269 struct ksock_conn *tx_conn; /* owning conn */
270 struct lnet_msg *tx_lnetmsg; /* lnet message for lnet_finalize() */
271 time64_t tx_deadline; /* when (in secs) tx times out */
272 struct ksock_msg tx_msg; /* socklnd message buffer */
273 int tx_desc_size; /* size of this descriptor */
274 enum lnet_msg_hstatus tx_hstatus; /* health status of tx */
275 struct kvec tx_hdr; /* virt hdr */
276 struct bio_vec tx_payload[0]; /* paged payload */
279 #define KSOCK_NOOP_TX_SIZE ((int)offsetof(struct ksock_tx, tx_payload[0]))
281 /* space for the rx frag descriptors; we either read a single contiguous
282 * header, or up to LNET_MAX_IOV frags of payload of either type. */
283 union ksock_rxiovspace {
284 struct kvec iov[LNET_MAX_IOV];
285 struct bio_vec kiov[LNET_MAX_IOV];
288 #define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
289 #define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
290 #define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
291 #define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
292 #define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
293 #define SOCKNAL_RX_SLOP 6 /* skipping body */
296 struct ksock_peer_ni *ksnc_peer; /* owning peer_ni */
297 struct ksock_conn_cb *ksnc_conn_cb; /* owning conn control block */
298 struct list_head ksnc_list; /* on peer_ni's conn list */
299 struct socket *ksnc_sock; /* actual socket */
300 void *ksnc_saved_data_ready; /* socket's original
302 void *ksnc_saved_write_space; /* socket's original
303 * write_space() cb */
304 refcount_t ksnc_conn_refcount; /* conn refcount */
305 refcount_t ksnc_sock_refcount; /* sock refcount */
306 struct ksock_sched *ksnc_scheduler; /* who schedules this
308 struct sockaddr_storage ksnc_myaddr; /* my address */
309 struct sockaddr_storage ksnc_peeraddr; /* peer_ni's address */
310 signed int ksnc_type:3; /* type of connection,
313 unsigned int ksnc_closing:1; /* being shut down */
314 unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
315 unsigned int ksnc_zc_capable:1; /* enable to ZC */
316 const struct ksock_proto *ksnc_proto; /* protocol for the connection */
320 /* where I enq waiting input or a forwarding descriptor */
321 struct list_head ksnc_rx_list;
322 time64_t ksnc_rx_deadline; /* when (in seconds) receive times out */
323 __u8 ksnc_rx_started; /* started receiving a message */
324 __u8 ksnc_rx_ready; /* data ready to read */
325 __u8 ksnc_rx_scheduled;/* being progressed */
326 __u8 ksnc_rx_state; /* what is being read */
327 int ksnc_rx_nob_left; /* # bytes to next hdr/body */
328 int ksnc_rx_nob_wanted; /* bytes actually wanted */
329 int ksnc_rx_niov; /* # kvec frags */
330 struct kvec *ksnc_rx_iov; /* the kvec frags */
331 int ksnc_rx_nkiov; /* # page frags */
332 struct bio_vec *ksnc_rx_kiov; /* the page frags */
333 union ksock_rxiovspace ksnc_rx_iov_space;/* space for frag descriptors */
334 __u32 ksnc_rx_csum; /* partial checksum for incoming
336 struct lnet_msg *ksnc_lnet_msg; /* rx lnet_finalize arg*/
337 struct ksock_msg ksnc_msg; /* incoming message buffer:
338 * V2.x message takes the
340 * V1.x message is a bare
341 * struct lnet_hdr, it's stored
342 * in ksnc_msg.ksm_u.lnetmsg
345 /* where I enq waiting for output space */
346 struct list_head ksnc_tx_list;
347 /* packets waiting to be sent */
348 struct list_head ksnc_tx_queue;
349 /* next TX that can carry a LNet message or ZC-ACK */
350 struct ksock_tx *ksnc_tx_carrier;
351 /* when (in seconds) tx times out */
352 time64_t ksnc_tx_deadline;
353 /* send buffer marker */
356 atomic_t ksnc_tx_nob;
359 /* being progressed */
360 int ksnc_tx_scheduled;
361 /* time stamp of the last posted TX */
362 time64_t ksnc_tx_last_post;
365 #define SOCKNAL_CONN_COUNT_MAX_BITS 8 /* max conn count bits */
367 struct ksock_conn_cb {
368 struct list_head ksnr_connd_list;/* chain on ksnr_connd_routes */
369 struct ksock_peer_ni *ksnr_peer; /* owning peer_ni */
370 refcount_t ksnr_refcount; /* # users */
371 time64_t ksnr_timeout; /* when (in secs) reconnection
374 time64_t ksnr_retry_interval;/* secs between retries */
375 int ksnr_myiface; /* interface index */
376 struct sockaddr_storage ksnr_addr; /* IP address to connect to */
377 unsigned int ksnr_scheduled:1;/* scheduled for attention */
378 unsigned int ksnr_connecting:1;/* connection in progress */
379 unsigned int ksnr_connected:4;/* connections by type */
380 unsigned int ksnr_deleted:1; /* been removed from peer_ni? */
381 unsigned int ksnr_ctrl_conn_count:1; /* # conns by type */
382 unsigned int ksnr_blki_conn_count:8;
383 unsigned int ksnr_blko_conn_count:8;
384 int ksnr_conn_count;/* total # conns for this cb */
388 #define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
390 struct ksock_peer_ni {
391 struct hlist_node ksnp_list; /* stash on global peer_ni list */
392 time64_t ksnp_last_alive;/* when (in seconds) I was last alive */
393 struct lnet_process_id ksnp_id; /* who's on the other end(s) */
394 refcount_t ksnp_refcount; /* # users */
395 int ksnp_closing; /* being closed */
396 int ksnp_accepting; /* # passive connections pending */
397 int ksnp_error; /* errno on closing last conn */
398 __u64 ksnp_zc_next_cookie;/* ZC completion cookie */
399 __u64 ksnp_incarnation; /* latest known peer_ni incarnation */
400 const struct ksock_proto *ksnp_proto; /* latest known protocol */
401 struct list_head ksnp_conns; /* all active connections */
402 struct ksock_conn_cb *ksnp_conn_cb; /* conn control block */
403 struct list_head ksnp_tx_queue; /* waiting packets */
404 spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
405 /* zero copy requests wait for ACK */
406 struct list_head ksnp_zc_req_list;
407 time64_t ksnp_send_keepalive; /* time to send keepalive */
408 struct lnet_ni *ksnp_ni; /* which network */
409 int ksnp_n_passive_ips; /* # of... */
410 __u32 ksnp_passive_ips[LNET_INTERFACES_NUM]; /* preferred local interfaces */
413 struct ksock_connreq {
414 /* stash on ksnd_connd_connreqs */
415 struct list_head ksncr_list;
417 struct lnet_ni *ksncr_ni;
418 /* accepted socket */
419 struct socket *ksncr_sock;
422 extern struct ksock_nal_data ksocknal_data;
423 extern struct ksock_tunables ksocknal_tunables;
425 #define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
426 #define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
427 #define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
430 int pro_version; /* version number of protocol */
431 int (*pro_send_hello)(struct ksock_conn *, struct ksock_hello_msg *); /* handshake function */
432 int (*pro_recv_hello)(struct ksock_conn *, struct ksock_hello_msg *, int);/* handshake function */
433 void (*pro_pack)(struct ksock_tx *); /* message pack */
434 void (*pro_unpack)(struct ksock_msg *); /* message unpack */
435 struct ksock_tx *(*pro_queue_tx_msg)(struct ksock_conn *, struct ksock_tx *); /* queue tx on the connection */
436 int (*pro_queue_tx_zcack)(struct ksock_conn *, struct ksock_tx *, __u64); /* queue ZC ack on the connection */
437 int (*pro_handle_zcreq)(struct ksock_conn *, __u64, int); /* handle ZC request */
438 int (*pro_handle_zcack)(struct ksock_conn *, __u64, __u64); /* handle ZC ACK */
439 int (*pro_match_tx)(struct ksock_conn *, struct ksock_tx *, int); /* msg type matches the connection type:
441 * return MATCH_NO : no
442 * return MATCH_YES : matching type
443 * return MATCH_MAY : can be backup */
446 extern const struct ksock_proto ksocknal_protocol_v1x;
447 extern const struct ksock_proto ksocknal_protocol_v2x;
448 extern const struct ksock_proto ksocknal_protocol_v3x;
450 #define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
451 #define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
452 #define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
454 #ifndef CPU_MASK_NONE
455 #define CPU_MASK_NONE 0UL
458 static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
461 return crc32_le(crc, p, len);
464 crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
471 ksocknal_conn_cb_mask(void)
473 if (!*ksocknal_tunables.ksnd_typed_conns)
474 return BIT(SOCKLND_CONN_ANY);
476 return (BIT(SOCKLND_CONN_CONTROL) |
477 BIT(SOCKLND_CONN_BULK_IN) |
478 BIT(SOCKLND_CONN_BULK_OUT));
482 ksocknal_conn_addref(struct ksock_conn *conn)
484 refcount_inc(&conn->ksnc_conn_refcount);
487 extern void ksocknal_queue_zombie_conn(struct ksock_conn *conn);
488 extern void ksocknal_finalize_zcreq(struct ksock_conn *conn);
491 ksocknal_conn_decref(struct ksock_conn *conn)
493 if (refcount_dec_and_test(&conn->ksnc_conn_refcount))
494 ksocknal_queue_zombie_conn(conn);
498 ksocknal_connsock_addref(struct ksock_conn *conn)
502 read_lock(&ksocknal_data.ksnd_global_lock);
503 if (!conn->ksnc_closing) {
504 refcount_inc(&conn->ksnc_sock_refcount);
507 read_unlock(&ksocknal_data.ksnd_global_lock);
513 ksocknal_connsock_decref(struct ksock_conn *conn)
515 if (refcount_dec_and_test(&conn->ksnc_sock_refcount)) {
516 LASSERT (conn->ksnc_closing);
517 sock_release(conn->ksnc_sock);
518 conn->ksnc_sock = NULL;
519 ksocknal_finalize_zcreq(conn);
524 ksocknal_tx_addref(struct ksock_tx *tx)
526 refcount_inc(&tx->tx_refcount);
529 extern void ksocknal_tx_prep(struct ksock_conn *, struct ksock_tx *tx);
530 extern void ksocknal_tx_done(struct lnet_ni *ni, struct ksock_tx *tx, int error);
533 ksocknal_tx_decref(struct ksock_tx *tx)
535 if (refcount_dec_and_test(&tx->tx_refcount))
536 ksocknal_tx_done(NULL, tx, 0);
540 ksocknal_conn_cb_addref(struct ksock_conn_cb *conn_cb)
542 refcount_inc(&conn_cb->ksnr_refcount);
545 extern void ksocknal_destroy_conn_cb(struct ksock_conn_cb *conn_cb);
548 ksocknal_conn_cb_decref(struct ksock_conn_cb *conn_cb)
550 if (refcount_dec_and_test(&conn_cb->ksnr_refcount))
551 ksocknal_destroy_conn_cb(conn_cb);
555 ksocknal_peer_addref(struct ksock_peer_ni *peer_ni)
557 refcount_inc(&peer_ni->ksnp_refcount);
560 extern void ksocknal_destroy_peer(struct ksock_peer_ni *peer_ni);
563 ksocknal_peer_decref(struct ksock_peer_ni *peer_ni)
565 if (refcount_dec_and_test(&peer_ni->ksnp_refcount))
566 ksocknal_destroy_peer(peer_ni);
569 static inline int ksocknal_timeout(void)
571 return *ksocknal_tunables.ksnd_timeout ?: lnet_get_lnd_timeout();
574 static inline int ksocknal_conns_per_peer(void)
576 return *ksocknal_tunables.ksnd_conns_per_peer ?: 1;
579 int ksocknal_startup(struct lnet_ni *ni);
580 void ksocknal_shutdown(struct lnet_ni *ni);
581 int ksocknal_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg);
582 int ksocknal_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg);
583 int ksocknal_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
584 int delayed, unsigned int niov,
585 struct bio_vec *kiov,
586 unsigned int offset, unsigned int mlen, unsigned int rlen);
587 int ksocknal_accept(struct lnet_ni *ni, struct socket *sock);
589 int ksocknal_add_peer(struct lnet_ni *ni, struct lnet_process_id id,
590 struct sockaddr *addr);
591 struct ksock_peer_ni *ksocknal_find_peer_locked(struct lnet_ni *ni,
592 struct lnet_process_id id);
593 struct ksock_peer_ni *ksocknal_find_peer(struct lnet_ni *ni,
594 struct lnet_process_id id);
595 extern void ksocknal_peer_failed(struct ksock_peer_ni *peer_ni);
596 extern int ksocknal_create_conn(struct lnet_ni *ni,
597 struct ksock_conn_cb *conn_cb,
598 struct socket *sock, int type);
599 extern void ksocknal_close_conn_locked(struct ksock_conn *conn, int why);
600 extern void ksocknal_terminate_conn(struct ksock_conn *conn);
601 extern void ksocknal_destroy_conn(struct ksock_conn *conn);
602 extern int ksocknal_close_peer_conns_locked(struct ksock_peer_ni *peer_ni,
603 struct sockaddr *peer, int why);
604 extern int ksocknal_close_conn_and_siblings(struct ksock_conn *conn, int why);
605 int ksocknal_close_matching_conns(struct lnet_process_id id, __u32 ipaddr);
606 extern struct ksock_conn *ksocknal_find_conn_locked(struct ksock_peer_ni *peer_ni,
607 struct ksock_tx *tx, int nonblk);
609 extern int ksocknal_launch_packet(struct lnet_ni *ni, struct ksock_tx *tx,
610 struct lnet_process_id id);
611 extern struct ksock_tx *ksocknal_alloc_tx(int type, int size);
612 extern void ksocknal_free_tx(struct ksock_tx *tx);
613 extern struct ksock_tx *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
614 extern void ksocknal_next_tx_carrier(struct ksock_conn *conn);
615 extern void ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn);
616 extern void ksocknal_txlist_done(struct lnet_ni *ni, struct list_head *txlist,
618 extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
619 extern void ksocknal_thread_fini(void);
620 extern void ksocknal_launch_all_connections_locked(struct ksock_peer_ni *peer_ni);
621 extern struct ksock_conn_cb *ksocknal_find_connectable_conn_cb_locked(struct ksock_peer_ni *peer_ni);
622 extern struct ksock_conn_cb *ksocknal_find_connecting_conn_cb_locked(struct ksock_peer_ni *peer_ni);
623 extern int ksocknal_new_packet(struct ksock_conn *conn, int skip);
624 extern int ksocknal_scheduler(void *arg);
625 extern int ksocknal_connd(void *arg);
626 extern int ksocknal_reaper(void *arg);
627 int ksocknal_send_hello(struct lnet_ni *ni, struct ksock_conn *conn,
628 lnet_nid_t peer_nid, struct ksock_hello_msg *hello);
629 int ksocknal_recv_hello(struct lnet_ni *ni, struct ksock_conn *conn,
630 struct ksock_hello_msg *hello,
631 struct lnet_process_id *id,
633 extern void ksocknal_read_callback(struct ksock_conn *conn);
634 extern void ksocknal_write_callback(struct ksock_conn *conn);
636 extern int ksocknal_lib_zc_capable(struct ksock_conn *conn);
637 extern void ksocknal_lib_save_callback(struct socket *sock, struct ksock_conn *conn);
638 extern void ksocknal_lib_set_callback(struct socket *sock, struct ksock_conn *conn);
639 extern void ksocknal_lib_reset_callback(struct socket *sock,
640 struct ksock_conn *conn);
641 extern void ksocknal_lib_push_conn(struct ksock_conn *conn);
642 extern int ksocknal_lib_get_conn_addrs(struct ksock_conn *conn);
643 extern int ksocknal_lib_setup_sock(struct socket *so);
644 extern int ksocknal_lib_send_hdr(struct ksock_conn *conn, struct ksock_tx *tx,
645 struct kvec *scratch_iov);
646 extern int ksocknal_lib_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx,
647 struct kvec *scratch_iov);
648 extern void ksocknal_lib_eager_ack(struct ksock_conn *conn);
649 extern int ksocknal_lib_recv_iov(struct ksock_conn *conn,
650 struct kvec *scratchiov);
651 extern int ksocknal_lib_recv_kiov(struct ksock_conn *conn, struct page **pages,
652 struct kvec *scratchiov);
653 extern int ksocknal_lib_get_conn_tunables(struct ksock_conn *conn, int *txmem,
654 int *rxmem, int *nagle);
656 extern int ksocknal_tunables_init(void);
658 extern void ksocknal_lib_csum_tx(struct ksock_tx *tx);
660 extern int ksocknal_lib_memory_pressure(struct ksock_conn *conn);
662 #endif /* _SOCKLND_SOCKLND_H_ */