2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
4 * Copyright (c) 2011, 2012, 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 #define DEBUG_PORTAL_ALLOC
29 #define DEBUG_SUBSYSTEM S_LND
31 #include "socklnd_lib-linux.h"
33 #include <linux/libcfs/libcfs.h>
34 #include <linux/lnet/lnet.h>
35 #include <linux/lnet/lib-lnet.h>
36 #include <linux/lnet/socklnd.h>
37 #include <linux/lnet/lnet-sysctl.h>
39 #define SOCKNAL_PEER_HASH_SIZE 101 /* # peer lists */
40 #define SOCKNAL_RESCHED 100 /* # scheduler loops before reschedule */
41 #define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */
42 #define SOCKNAL_ENOMEM_RETRY CFS_TICK /* jiffies between retries */
44 #define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
45 #define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
47 #define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
49 /* risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
50 * no risk if we're not running on a CONFIG_HIGHMEM platform. */
52 # define SOCKNAL_RISK_KMAP_DEADLOCK 0
54 # define SOCKNAL_RISK_KMAP_DEADLOCK 1
57 struct ksock_sched_info;
59 typedef struct /* per scheduler state */
61 spinlock_t kss_lock; /* serialise */
62 struct list_head kss_rx_conns; /* conn waiting to be read */
63 /* conn waiting to be written */
64 struct list_head kss_tx_conns;
65 /* zombie noop tx list */
66 struct list_head kss_zombie_noop_txs;
67 wait_queue_head_t kss_waitq; /* where scheduler sleeps */
68 /* # connections assigned to this scheduler */
70 struct ksock_sched_info *kss_info; /* owner of it */
71 struct page *kss_rx_scratch_pgs[LNET_MAX_IOV];
72 struct iovec kss_scratch_iov[LNET_MAX_IOV];
75 struct ksock_sched_info {
76 int ksi_nthreads_max; /* max allowed threads */
77 int ksi_nthreads; /* number of threads */
78 int ksi_cpt; /* CPT id */
79 ksock_sched_t *ksi_scheds; /* array of schedulers */
82 #define KSOCK_CPT_SHIFT 16
83 #define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
84 #define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
85 #define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
87 typedef struct /* in-use interface */
89 __u32 ksni_ipaddr; /* interface's IP address */
90 __u32 ksni_netmask; /* interface's network mask */
91 int ksni_nroutes; /* # routes using (active) */
92 int ksni_npeers; /* # peers using (passive) */
93 char ksni_name[IFNAMSIZ]; /* interface name */
98 /* "stuck" socket timeout (seconds) */
100 /* # scheduler threads in each pool while starting */
102 int *ksnd_nconnds; /* # connection daemons */
103 int *ksnd_nconnds_max; /* max # connection daemons */
104 int *ksnd_min_reconnectms; /* first connection retry after (ms)... */
105 int *ksnd_max_reconnectms; /* ...exponentially increasing to this */
106 int *ksnd_eager_ack; /* make TCP ack eagerly? */
107 int *ksnd_typed_conns; /* drive sockets by type? */
108 int *ksnd_min_bulk; /* smallest "large" message */
109 int *ksnd_tx_buffer_size; /* socket tx buffer size */
110 int *ksnd_rx_buffer_size; /* socket rx buffer size */
111 int *ksnd_nagle; /* enable NAGLE? */
112 int *ksnd_round_robin; /* round robin for multiple interfaces */
113 int *ksnd_keepalive; /* # secs for sending keepalive NOOP */
114 int *ksnd_keepalive_idle; /* # idle secs before 1st probe */
115 int *ksnd_keepalive_count; /* # probes */
116 int *ksnd_keepalive_intvl; /* time between probes */
117 int *ksnd_credits; /* # concurrent sends */
118 int *ksnd_peertxcredits; /* # concurrent sends to 1 peer */
119 int *ksnd_peerrtrcredits; /* # per-peer router buffer credits */
120 int *ksnd_peertimeout; /* seconds to consider peer dead */
121 int *ksnd_enable_csum; /* enable check sum */
122 int *ksnd_inject_csum_error; /* set non-zero to inject checksum error */
123 int *ksnd_nonblk_zcack; /* always send zc-ack on non-blocking connection */
124 unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload size */
125 int *ksnd_zc_recv; /* enable ZC receive (for Chelsio TOE) */
126 int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to enable ZC receive */
127 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
128 ctl_table_header_t *ksnd_sysctl; /* sysctl interface */
134 __u64 ksnn_incarnation; /* my epoch */
135 spinlock_t ksnn_lock; /* serialise */
136 struct list_head ksnn_list; /* chain on global list */
137 int ksnn_npeers; /* # peers */
138 int ksnn_shutdown; /* shutting down? */
139 int ksnn_ninterfaces; /* IP interfaces */
140 ksock_interface_t ksnn_interfaces[LNET_MAX_INTERFACES];
144 #define SOCKNAL_CONND_TIMEOUT 120
145 /** reserved thread for accepting & creating new connd */
146 #define SOCKNAL_CONND_RESV 1
150 int ksnd_init; /* initialisation state */
151 int ksnd_nnets; /* # networks set up */
152 struct list_head ksnd_nets; /* list of nets */
153 /* stabilize peer/conn ops */
154 rwlock_t ksnd_global_lock;
155 /* hash table of all my known peers */
156 struct list_head *ksnd_peers;
157 int ksnd_peer_hash_size; /* size of ksnd_peers */
159 int ksnd_nthreads; /* # live threads */
160 int ksnd_shuttingdown; /* tell threads to exit */
161 /* schedulers information */
162 struct ksock_sched_info **ksnd_sched_info;
164 atomic_t ksnd_nactive_txs; /* #active txs */
166 struct list_head ksnd_deathrow_conns; /* conns to close: reaper_lock*/
167 struct list_head ksnd_zombie_conns; /* conns to free: reaper_lock */
168 struct list_head ksnd_enomem_conns; /* conns to retry: reaper_lock*/
169 wait_queue_head_t ksnd_reaper_waitq; /* reaper sleeps here */
170 cfs_time_t ksnd_reaper_waketime;/* when reaper will wake */
171 spinlock_t ksnd_reaper_lock; /* serialise */
173 int ksnd_enomem_tx; /* test ENOMEM sender */
174 int ksnd_stall_tx; /* test sluggish sender */
175 int ksnd_stall_rx; /* test sluggish receiver */
177 struct list_head ksnd_connd_connreqs; /* incoming connection requests */
178 struct list_head ksnd_connd_routes; /* routes waiting to be connected */
179 wait_queue_head_t ksnd_connd_waitq; /* connds sleep here */
180 int ksnd_connd_connecting;/* # connds connecting */
181 /** time stamp of the last failed connecting attempt */
182 long ksnd_connd_failed_stamp;
183 /** # starting connd */
184 unsigned ksnd_connd_starting;
185 /** time stamp of the last starting connd */
186 long ksnd_connd_starting_stamp;
187 /** # running connd */
188 unsigned ksnd_connd_running;
189 spinlock_t ksnd_connd_lock; /* serialise */
191 struct list_head ksnd_idle_noop_txs; /* list head for freed noop tx */
192 spinlock_t ksnd_tx_lock; /* serialise, g_lock unsafe */
196 #define SOCKNAL_INIT_NOTHING 0
197 #define SOCKNAL_INIT_DATA 1
198 #define SOCKNAL_INIT_ALL 2
200 /* A packet just assembled for transmission is represented by 1 or more
201 * struct iovec fragments (the first frag contains the portals header),
202 * followed by 0 or more lnet_kiov_t fragments.
204 * On the receive side, initially 1 struct iovec fragment is posted for
205 * receive (the header). Once the header has been received, the payload is
206 * received into either struct iovec or lnet_kiov_t fragments, depending on
207 * what the header matched or whether the message needs forwarding. */
209 struct ksock_conn; /* forward ref */
210 struct ksock_peer; /* forward ref */
211 struct ksock_route; /* forward ref */
212 struct ksock_proto; /* forward ref */
214 typedef struct /* transmit packet */
216 struct list_head tx_list; /* queue on conn for transmission etc */
217 struct list_head tx_zc_list; /* queue on peer for ZC request */
218 atomic_t tx_refcount; /* tx reference count */
219 int tx_nob; /* # packet bytes */
220 int tx_resid; /* residual bytes */
221 int tx_niov; /* # packet iovec frags */
222 struct iovec *tx_iov; /* packet iovec frags */
223 int tx_nkiov; /* # packet page frags */
224 unsigned short tx_zc_aborted; /* aborted ZC request */
225 unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
226 unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
227 unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
228 lnet_kiov_t *tx_kiov; /* packet page frags */
229 struct ksock_conn *tx_conn; /* owning conn */
230 lnet_msg_t *tx_lnetmsg; /* lnet message for lnet_finalize() */
231 cfs_time_t tx_deadline; /* when (in jiffies) tx times out */
232 ksock_msg_t tx_msg; /* socklnd message buffer */
233 int tx_desc_size; /* size of this descriptor */
236 struct iovec iov; /* virt hdr */
237 lnet_kiov_t kiov[0]; /* paged payload */
240 struct iovec iov[1]; /* virt hdr + payload */
245 #define KSOCK_NOOP_TX_SIZE ((int)offsetof(ksock_tx_t, tx_frags.paged.kiov[0]))
247 /* network zero copy callback descriptor embedded in ksock_tx_t */
249 /* space for the rx frag descriptors; we either read a single contiguous
250 * header, or up to LNET_MAX_IOV frags of payload of either type. */
252 struct iovec iov[LNET_MAX_IOV];
253 lnet_kiov_t kiov[LNET_MAX_IOV];
254 } ksock_rxiovspace_t;
256 #define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
257 #define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
258 #define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
259 #define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
260 #define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
261 #define SOCKNAL_RX_SLOP 6 /* skipping body */
263 typedef struct ksock_conn
265 struct ksock_peer *ksnc_peer; /* owning peer */
266 struct ksock_route *ksnc_route; /* owning route */
267 struct list_head ksnc_list; /* stash on peer's conn list */
268 socket_t *ksnc_sock; /* actual socket */
269 void *ksnc_saved_data_ready; /* socket's original data_ready() callback */
270 void *ksnc_saved_write_space; /* socket's original write_space() callback */
271 atomic_t ksnc_conn_refcount; /* conn refcount */
272 atomic_t ksnc_sock_refcount; /* sock refcount */
273 ksock_sched_t *ksnc_scheduler; /* who schedules this connection */
274 __u32 ksnc_myipaddr; /* my IP */
275 __u32 ksnc_ipaddr; /* peer's IP */
276 int ksnc_port; /* peer's port */
277 signed int ksnc_type:3; /* type of connection,
278 * should be signed value */
279 unsigned int ksnc_closing:1; /* being shut down */
280 unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
281 unsigned int ksnc_zc_capable:1; /* enable to ZC */
282 struct ksock_proto *ksnc_proto; /* protocol for the connection */
285 struct list_head ksnc_rx_list; /* where I enq waiting input or a forwarding descriptor */
286 cfs_time_t ksnc_rx_deadline; /* when (in jiffies) receive times out */
287 __u8 ksnc_rx_started; /* started receiving a message */
288 __u8 ksnc_rx_ready; /* data ready to read */
289 __u8 ksnc_rx_scheduled;/* being progressed */
290 __u8 ksnc_rx_state; /* what is being read */
291 int ksnc_rx_nob_left; /* # bytes to next hdr/body */
292 int ksnc_rx_nob_wanted; /* bytes actually wanted */
293 int ksnc_rx_niov; /* # iovec frags */
294 struct iovec *ksnc_rx_iov; /* the iovec frags */
295 int ksnc_rx_nkiov; /* # page frags */
296 lnet_kiov_t *ksnc_rx_kiov; /* the page frags */
297 ksock_rxiovspace_t ksnc_rx_iov_space;/* space for frag descriptors */
298 __u32 ksnc_rx_csum; /* partial checksum for incoming data */
299 void *ksnc_cookie; /* rx lnet_finalize passthru arg */
300 ksock_msg_t ksnc_msg; /* incoming message buffer:
301 * V2.x message takes the
303 * V1.x message is a bare
304 * lnet_hdr_t, it's stored in
305 * ksnc_msg.ksm_u.lnetmsg */
308 struct list_head ksnc_tx_list; /* where I enq waiting for output space */
309 struct list_head ksnc_tx_queue; /* packets waiting to be sent */
310 ksock_tx_t *ksnc_tx_carrier; /* next TX that can carry a LNet message or ZC-ACK */
311 cfs_time_t ksnc_tx_deadline; /* when (in jiffies) tx times out */
312 int ksnc_tx_bufnob; /* send buffer marker */
313 atomic_t ksnc_tx_nob; /* # bytes queued */
314 int ksnc_tx_ready; /* write space */
315 int ksnc_tx_scheduled; /* being progressed */
316 cfs_time_t ksnc_tx_last_post; /* time stamp of the last posted TX */
319 typedef struct ksock_route
321 struct list_head ksnr_list; /* chain on peer route list */
322 struct list_head ksnr_connd_list; /* chain on ksnr_connd_routes */
323 struct ksock_peer *ksnr_peer; /* owning peer */
324 atomic_t ksnr_refcount; /* # users */
325 cfs_time_t ksnr_timeout; /* when (in jiffies) reconnection can happen next */
326 cfs_duration_t ksnr_retry_interval; /* how long between retries */
327 __u32 ksnr_myipaddr; /* my IP */
328 __u32 ksnr_ipaddr; /* IP address to connect to */
329 int ksnr_port; /* port to connect to */
330 unsigned int ksnr_scheduled:1; /* scheduled for attention */
331 unsigned int ksnr_connecting:1;/* connection establishment in progress */
332 unsigned int ksnr_connected:4; /* connections established by type */
333 unsigned int ksnr_deleted:1; /* been removed from peer? */
334 unsigned int ksnr_share_count; /* created explicitly? */
335 int ksnr_conn_count; /* # conns established by this route */
338 #define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
340 typedef struct ksock_peer
342 struct list_head ksnp_list; /* stash on global peer list */
343 cfs_time_t ksnp_last_alive; /* when (in jiffies) I was last alive */
344 lnet_process_id_t ksnp_id; /* who's on the other end(s) */
345 atomic_t ksnp_refcount; /* # users */
346 int ksnp_sharecount; /* lconf usage counter */
347 int ksnp_closing; /* being closed */
348 int ksnp_accepting;/* # passive connections pending */
349 int ksnp_error; /* errno on closing last conn */
350 __u64 ksnp_zc_next_cookie;/* ZC completion cookie */
351 __u64 ksnp_incarnation; /* latest known peer incarnation */
352 struct ksock_proto *ksnp_proto; /* latest known peer protocol */
353 struct list_head ksnp_conns; /* all active connections */
354 struct list_head ksnp_routes; /* routes */
355 struct list_head ksnp_tx_queue; /* waiting packets */
356 spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
357 struct list_head ksnp_zc_req_list; /* zero copy requests wait for ACK */
358 cfs_time_t ksnp_send_keepalive; /* time to send keepalive */
359 lnet_ni_t *ksnp_ni; /* which network */
360 int ksnp_n_passive_ips; /* # of... */
361 __u32 ksnp_passive_ips[LNET_MAX_INTERFACES]; /* preferred local interfaces */
364 typedef struct ksock_connreq
366 struct list_head ksncr_list; /* stash on ksnd_connd_connreqs */
367 lnet_ni_t *ksncr_ni; /* chosen NI */
368 socket_t *ksncr_sock; /* accepted socket */
371 extern ksock_nal_data_t ksocknal_data;
372 extern ksock_tunables_t ksocknal_tunables;
374 #define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
375 #define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
376 #define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
378 typedef struct ksock_proto
380 int pro_version; /* version number of protocol */
381 int (*pro_send_hello)(ksock_conn_t *, ksock_hello_msg_t *); /* handshake function */
382 int (*pro_recv_hello)(ksock_conn_t *, ksock_hello_msg_t *, int);/* handshake function */
383 void (*pro_pack)(ksock_tx_t *); /* message pack */
384 void (*pro_unpack)(ksock_msg_t *); /* message unpack */
385 ksock_tx_t *(*pro_queue_tx_msg)(ksock_conn_t *, ksock_tx_t *); /* queue tx on the connection */
386 int (*pro_queue_tx_zcack)(ksock_conn_t *, ksock_tx_t *, __u64); /* queue ZC ack on the connection */
387 int (*pro_handle_zcreq)(ksock_conn_t *, __u64, int); /* handle ZC request */
388 int (*pro_handle_zcack)(ksock_conn_t *, __u64, __u64); /* handle ZC ACK */
389 int (*pro_match_tx)(ksock_conn_t *, ksock_tx_t *, int); /* msg type matches the connection type:
391 * return MATCH_NO : no
392 * return MATCH_YES : matching type
393 * return MATCH_MAY : can be backup */
396 extern ksock_proto_t ksocknal_protocol_v1x;
397 extern ksock_proto_t ksocknal_protocol_v2x;
398 extern ksock_proto_t ksocknal_protocol_v3x;
400 #define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
401 #define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
402 #define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
404 #ifndef CPU_MASK_NONE
405 #define CPU_MASK_NONE 0UL
409 ksocknal_route_mask(void)
411 if (!*ksocknal_tunables.ksnd_typed_conns)
412 return (1 << SOCKLND_CONN_ANY);
414 return ((1 << SOCKLND_CONN_CONTROL) |
415 (1 << SOCKLND_CONN_BULK_IN) |
416 (1 << SOCKLND_CONN_BULK_OUT));
419 static inline struct list_head *
420 ksocknal_nid2peerlist (lnet_nid_t nid)
422 unsigned int hash = ((unsigned int)nid) % ksocknal_data.ksnd_peer_hash_size;
424 return (&ksocknal_data.ksnd_peers [hash]);
428 ksocknal_conn_addref (ksock_conn_t *conn)
430 LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0);
431 atomic_inc(&conn->ksnc_conn_refcount);
434 extern void ksocknal_queue_zombie_conn (ksock_conn_t *conn);
435 extern void ksocknal_finalize_zcreq(ksock_conn_t *conn);
438 ksocknal_conn_decref (ksock_conn_t *conn)
440 LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0);
441 if (atomic_dec_and_test(&conn->ksnc_conn_refcount))
442 ksocknal_queue_zombie_conn(conn);
446 ksocknal_connsock_addref (ksock_conn_t *conn)
450 read_lock(&ksocknal_data.ksnd_global_lock);
451 if (!conn->ksnc_closing) {
452 LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0);
453 atomic_inc(&conn->ksnc_sock_refcount);
456 read_unlock(&ksocknal_data.ksnd_global_lock);
462 ksocknal_connsock_decref (ksock_conn_t *conn)
464 LASSERT (atomic_read(&conn->ksnc_sock_refcount) > 0);
465 if (atomic_dec_and_test(&conn->ksnc_sock_refcount)) {
466 LASSERT (conn->ksnc_closing);
467 libcfs_sock_release(conn->ksnc_sock);
468 conn->ksnc_sock = NULL;
469 ksocknal_finalize_zcreq(conn);
474 ksocknal_tx_addref (ksock_tx_t *tx)
476 LASSERT (atomic_read(&tx->tx_refcount) > 0);
477 atomic_inc(&tx->tx_refcount);
480 extern void ksocknal_tx_prep (ksock_conn_t *, ksock_tx_t *tx);
481 extern void ksocknal_tx_done (lnet_ni_t *ni, ksock_tx_t *tx);
484 ksocknal_tx_decref (ksock_tx_t *tx)
486 LASSERT (atomic_read(&tx->tx_refcount) > 0);
487 if (atomic_dec_and_test(&tx->tx_refcount))
488 ksocknal_tx_done(NULL, tx);
492 ksocknal_route_addref (ksock_route_t *route)
494 LASSERT (atomic_read(&route->ksnr_refcount) > 0);
495 atomic_inc(&route->ksnr_refcount);
498 extern void ksocknal_destroy_route (ksock_route_t *route);
501 ksocknal_route_decref (ksock_route_t *route)
503 LASSERT (atomic_read (&route->ksnr_refcount) > 0);
504 if (atomic_dec_and_test(&route->ksnr_refcount))
505 ksocknal_destroy_route (route);
509 ksocknal_peer_addref (ksock_peer_t *peer)
511 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
512 atomic_inc(&peer->ksnp_refcount);
515 extern void ksocknal_destroy_peer (ksock_peer_t *peer);
518 ksocknal_peer_decref (ksock_peer_t *peer)
520 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
521 if (atomic_dec_and_test(&peer->ksnp_refcount))
522 ksocknal_destroy_peer (peer);
525 int ksocknal_startup (lnet_ni_t *ni);
526 void ksocknal_shutdown (lnet_ni_t *ni);
527 int ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
528 int ksocknal_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
529 int ksocknal_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
530 int delayed, unsigned int niov,
531 struct iovec *iov, lnet_kiov_t *kiov,
532 unsigned int offset, unsigned int mlen, unsigned int rlen);
533 int ksocknal_accept(lnet_ni_t *ni, socket_t *sock);
535 extern int ksocknal_add_peer(lnet_ni_t *ni, lnet_process_id_t id, __u32 ip, int port);
536 extern ksock_peer_t *ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id);
537 extern ksock_peer_t *ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id);
538 extern void ksocknal_peer_failed (ksock_peer_t *peer);
539 extern int ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route,
540 socket_t *sock, int type);
541 extern void ksocknal_close_conn_locked (ksock_conn_t *conn, int why);
542 extern void ksocknal_terminate_conn (ksock_conn_t *conn);
543 extern void ksocknal_destroy_conn (ksock_conn_t *conn);
544 extern int ksocknal_close_peer_conns_locked (ksock_peer_t *peer,
545 __u32 ipaddr, int why);
546 extern int ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why);
547 extern int ksocknal_close_matching_conns (lnet_process_id_t id, __u32 ipaddr);
548 extern ksock_conn_t *ksocknal_find_conn_locked(ksock_peer_t *peer,
549 ksock_tx_t *tx, int nonblk);
551 extern int ksocknal_launch_packet(lnet_ni_t *ni, ksock_tx_t *tx,
552 lnet_process_id_t id);
553 extern ksock_tx_t *ksocknal_alloc_tx(int type, int size);
554 extern void ksocknal_free_tx (ksock_tx_t *tx);
555 extern ksock_tx_t *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
556 extern void ksocknal_next_tx_carrier(ksock_conn_t *conn);
557 extern void ksocknal_queue_tx_locked (ksock_tx_t *tx, ksock_conn_t *conn);
558 extern void ksocknal_txlist_done (lnet_ni_t *ni, struct list_head *txlist,
560 extern void ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive);
561 extern void ksocknal_query (struct lnet_ni *ni, lnet_nid_t nid, cfs_time_t *when);
562 extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
563 extern void ksocknal_thread_fini (void);
564 extern void ksocknal_launch_all_connections_locked (ksock_peer_t *peer);
565 extern ksock_route_t *ksocknal_find_connectable_route_locked (ksock_peer_t *peer);
566 extern ksock_route_t *ksocknal_find_connecting_route_locked (ksock_peer_t *peer);
567 extern int ksocknal_new_packet (ksock_conn_t *conn, int skip);
568 extern int ksocknal_scheduler (void *arg);
569 extern int ksocknal_connd (void *arg);
570 extern int ksocknal_reaper (void *arg);
571 extern int ksocknal_send_hello (lnet_ni_t *ni, ksock_conn_t *conn,
572 lnet_nid_t peer_nid, ksock_hello_msg_t *hello);
573 extern int ksocknal_recv_hello (lnet_ni_t *ni, ksock_conn_t *conn,
574 ksock_hello_msg_t *hello, lnet_process_id_t *id,
576 extern void ksocknal_read_callback(ksock_conn_t *conn);
577 extern void ksocknal_write_callback(ksock_conn_t *conn);
579 extern int ksocknal_lib_zc_capable(ksock_conn_t *conn);
580 extern void ksocknal_lib_save_callback(socket_t *sock, ksock_conn_t *conn);
581 extern void ksocknal_lib_set_callback(socket_t *sock, ksock_conn_t *conn);
582 extern void ksocknal_lib_reset_callback(socket_t *sock, ksock_conn_t *conn);
583 extern void ksocknal_lib_push_conn (ksock_conn_t *conn);
584 extern int ksocknal_lib_get_conn_addrs (ksock_conn_t *conn);
585 extern int ksocknal_lib_setup_sock (socket_t *so);
586 extern int ksocknal_lib_send_iov (ksock_conn_t *conn, ksock_tx_t *tx);
587 extern int ksocknal_lib_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx);
588 extern void ksocknal_lib_eager_ack (ksock_conn_t *conn);
589 extern int ksocknal_lib_recv_iov (ksock_conn_t *conn);
590 extern int ksocknal_lib_recv_kiov (ksock_conn_t *conn);
591 extern int ksocknal_lib_get_conn_tunables (ksock_conn_t *conn, int *txmem,
592 int *rxmem, int *nagle);
594 extern int ksocknal_tunables_init(void);
595 extern void ksocknal_tunables_fini(void);
596 extern int ksocknal_lib_tunables_init(void);
597 extern void ksocknal_lib_tunables_fini(void);
599 extern void ksocknal_lib_csum_tx(ksock_tx_t *tx);
601 extern int ksocknal_lib_memory_pressure(ksock_conn_t *conn);
602 extern int ksocknal_lib_bind_thread_to_cpu(int id);