2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
4 * Copyright (c) 2011, 2013, 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 #if defined(__linux__)
32 #include "socklnd_lib-linux.h"
34 #error Unsupported Operating System
37 #include <libcfs/libcfs.h>
38 #include <lnet/lnet.h>
39 #include <lnet/lib-lnet.h>
40 #include <lnet/socklnd.h>
42 #define SOCKNAL_PEER_HASH_SIZE 101 /* # peer lists */
43 #define SOCKNAL_RESCHED 100 /* # scheduler loops before reschedule */
44 #define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */
45 #define SOCKNAL_ENOMEM_RETRY CFS_TICK /* jiffies between retries */
47 #define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
48 #define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
50 #define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
52 /* risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
53 * no risk if we're not running on a CONFIG_HIGHMEM platform. */
55 # define SOCKNAL_RISK_KMAP_DEADLOCK 0
57 # define SOCKNAL_RISK_KMAP_DEADLOCK 1
60 struct ksock_sched_info;
62 typedef struct /* per scheduler state */
64 spinlock_t kss_lock; /* serialise */
65 struct list_head kss_rx_conns; /* conn waiting to be read */
66 /* conn waiting to be written */
67 struct list_head kss_tx_conns;
68 /* zombie noop tx list */
69 struct list_head kss_zombie_noop_txs;
70 wait_queue_head_t kss_waitq; /* where scheduler sleeps */
71 /* # connections assigned to this scheduler */
73 struct ksock_sched_info *kss_info; /* owner of it */
74 #if !SOCKNAL_SINGLE_FRAG_RX
75 struct page *kss_rx_scratch_pgs[LNET_MAX_IOV];
77 #if !SOCKNAL_SINGLE_FRAG_TX || !SOCKNAL_SINGLE_FRAG_RX
78 struct iovec kss_scratch_iov[LNET_MAX_IOV];
82 struct ksock_sched_info {
83 int ksi_nthreads_max; /* max allowed threads */
84 int ksi_nthreads; /* number of threads */
85 int ksi_cpt; /* CPT id */
86 ksock_sched_t *ksi_scheds; /* array of schedulers */
89 #define KSOCK_CPT_SHIFT 16
90 #define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
91 #define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
92 #define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
94 typedef struct /* in-use interface */
96 __u32 ksni_ipaddr; /* interface's IP address */
97 __u32 ksni_netmask; /* interface's network mask */
98 int ksni_nroutes; /* # routes using (active) */
99 int ksni_npeers; /* # peers using (passive) */
100 char ksni_name[IFNAMSIZ]; /* interface name */
105 /* "stuck" socket timeout (seconds) */
107 /* # scheduler threads in each pool while starting */
109 int *ksnd_nconnds; /* # connection daemons */
110 int *ksnd_nconnds_max; /* max # connection daemons */
111 int *ksnd_min_reconnectms; /* first connection retry after (ms)... */
112 int *ksnd_max_reconnectms; /* ...exponentially increasing to this */
113 int *ksnd_eager_ack; /* make TCP ack eagerly? */
114 int *ksnd_typed_conns; /* drive sockets by type? */
115 int *ksnd_min_bulk; /* smallest "large" message */
116 int *ksnd_tx_buffer_size; /* socket tx buffer size */
117 int *ksnd_rx_buffer_size; /* socket rx buffer size */
118 int *ksnd_nagle; /* enable NAGLE? */
119 int *ksnd_round_robin; /* round robin for multiple interfaces */
120 int *ksnd_keepalive; /* # secs for sending keepalive NOOP */
121 int *ksnd_keepalive_idle; /* # idle secs before 1st probe */
122 int *ksnd_keepalive_count; /* # probes */
123 int *ksnd_keepalive_intvl; /* time between probes */
124 int *ksnd_credits; /* # concurrent sends */
125 int *ksnd_peertxcredits; /* # concurrent sends to 1 peer */
126 int *ksnd_peerrtrcredits; /* # per-peer router buffer credits */
127 int *ksnd_peertimeout; /* seconds to consider peer dead */
128 int *ksnd_enable_csum; /* enable check sum */
129 int *ksnd_inject_csum_error; /* set non-zero to inject checksum error */
130 int *ksnd_nonblk_zcack; /* always send zc-ack on non-blocking connection */
131 unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload size */
132 int *ksnd_zc_recv; /* enable ZC receive (for Chelsio TOE) */
133 int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to enable ZC receive */
135 int *ksnd_irq_affinity; /* enable IRQ affinity? */
137 #ifdef SOCKNAL_BACKOFF
138 int *ksnd_backoff_init; /* initial TCP backoff */
139 int *ksnd_backoff_max; /* maximum TCP backoff */
141 #if SOCKNAL_VERSION_DEBUG
142 int *ksnd_protocol; /* protocol version */
144 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
145 struct ctl_table_header *ksnd_sysctl; /* sysctl interface */
151 __u64 ksnn_incarnation; /* my epoch */
152 spinlock_t ksnn_lock; /* serialise */
153 struct list_head ksnn_list; /* chain on global list */
154 int ksnn_npeers; /* # peers */
155 int ksnn_shutdown; /* shutting down? */
156 int ksnn_ninterfaces; /* IP interfaces */
157 ksock_interface_t ksnn_interfaces[LNET_MAX_INTERFACES];
161 #define SOCKNAL_CONND_TIMEOUT 120
162 /** reserved thread for accepting & creating new connd */
163 #define SOCKNAL_CONND_RESV 1
167 int ksnd_init; /* initialisation state */
168 int ksnd_nnets; /* # networks set up */
169 struct list_head ksnd_nets; /* list of nets */
170 /* stabilize peer/conn ops */
171 rwlock_t ksnd_global_lock;
172 /* hash table of all my known peers */
173 struct list_head *ksnd_peers;
174 int ksnd_peer_hash_size; /* size of ksnd_peers */
176 int ksnd_nthreads; /* # live threads */
177 int ksnd_shuttingdown; /* tell threads to exit */
178 /* schedulers information */
179 struct ksock_sched_info **ksnd_sched_info;
181 atomic_t ksnd_nactive_txs; /* #active txs */
183 /* conns to close: reaper_lock*/
184 struct list_head ksnd_deathrow_conns;
185 /* conns to free: reaper_lock */
186 struct list_head ksnd_zombie_conns;
187 /* conns to retry: reaper_lock*/
188 struct list_head ksnd_enomem_conns;
189 /* reaper sleeps here */
190 wait_queue_head_t ksnd_reaper_waitq;
191 /* when reaper will wake */
192 cfs_time_t ksnd_reaper_waketime;
194 spinlock_t ksnd_reaper_lock;
196 int ksnd_enomem_tx; /* test ENOMEM sender */
197 int ksnd_stall_tx; /* test sluggish sender */
198 int ksnd_stall_rx; /* test sluggish receiver */
200 /* incoming connection requests */
201 struct list_head ksnd_connd_connreqs;
202 /* routes waiting to be connected */
203 struct list_head ksnd_connd_routes;
204 /* connds sleep here */
205 wait_queue_head_t ksnd_connd_waitq;
206 /* # connds connecting */
207 int ksnd_connd_connecting;
208 /** time stamp of the last failed connecting attempt */
209 long ksnd_connd_failed_stamp;
210 /** # starting connd */
211 unsigned ksnd_connd_starting;
212 /** time stamp of the last starting connd */
213 long ksnd_connd_starting_stamp;
214 /** # running connd */
215 unsigned ksnd_connd_running;
217 spinlock_t ksnd_connd_lock;
219 /* list head for freed noop tx */
220 struct list_head ksnd_idle_noop_txs;
221 /* serialise, g_lock unsafe */
222 spinlock_t ksnd_tx_lock;
226 #define SOCKNAL_INIT_NOTHING 0
227 #define SOCKNAL_INIT_DATA 1
228 #define SOCKNAL_INIT_ALL 2
230 /* A packet just assembled for transmission is represented by 1 or more
231 * struct iovec fragments (the first frag contains the portals header),
232 * followed by 0 or more lnet_kiov_t fragments.
234 * On the receive side, initially 1 struct iovec fragment is posted for
235 * receive (the header). Once the header has been received, the payload is
236 * received into either struct iovec or lnet_kiov_t fragments, depending on
237 * what the header matched or whether the message needs forwarding. */
239 struct ksock_conn; /* forward ref */
240 struct ksock_peer; /* forward ref */
241 struct ksock_route; /* forward ref */
242 struct ksock_proto; /* forward ref */
244 typedef struct /* transmit packet */
246 struct list_head tx_list; /* queue on conn for transmission etc */
247 struct list_head tx_zc_list; /* queue on peer for ZC request */
248 atomic_t tx_refcount; /* tx reference count */
249 int tx_nob; /* # packet bytes */
250 int tx_resid; /* residual bytes */
251 int tx_niov; /* # packet iovec frags */
252 struct iovec *tx_iov; /* packet iovec frags */
253 int tx_nkiov; /* # packet page frags */
254 unsigned short tx_zc_aborted; /* aborted ZC request */
255 unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
256 unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
257 unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
258 lnet_kiov_t *tx_kiov; /* packet page frags */
259 struct ksock_conn *tx_conn; /* owning conn */
260 lnet_msg_t *tx_lnetmsg; /* lnet message for lnet_finalize() */
261 cfs_time_t tx_deadline; /* when (in jiffies) tx times out */
262 ksock_msg_t tx_msg; /* socklnd message buffer */
263 int tx_desc_size; /* size of this descriptor */
266 struct iovec iov; /* virt hdr */
267 lnet_kiov_t kiov[0]; /* paged payload */
270 struct iovec iov[1]; /* virt hdr + payload */
275 #define KSOCK_NOOP_TX_SIZE ((int)offsetof(ksock_tx_t, tx_frags.paged.kiov[0]))
277 /* network zero copy callback descriptor embedded in ksock_tx_t */
279 /* space for the rx frag descriptors; we either read a single contiguous
280 * header, or up to LNET_MAX_IOV frags of payload of either type. */
282 struct iovec iov[LNET_MAX_IOV];
283 lnet_kiov_t kiov[LNET_MAX_IOV];
284 } ksock_rxiovspace_t;
286 #define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
287 #define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
288 #define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
289 #define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
290 #define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
291 #define SOCKNAL_RX_SLOP 6 /* skipping body */
293 typedef struct ksock_conn
295 struct ksock_peer *ksnc_peer; /* owning peer */
296 struct ksock_route *ksnc_route; /* owning route */
297 struct list_head ksnc_list; /* stash on peer's conn list */
298 cfs_socket_t *ksnc_sock; /* actual socket */
299 void *ksnc_saved_data_ready; /* socket's original data_ready() callback */
300 void *ksnc_saved_write_space; /* socket's original write_space() callback */
301 atomic_t ksnc_conn_refcount; /* conn refcount */
302 atomic_t ksnc_sock_refcount; /* sock refcount */
303 ksock_sched_t *ksnc_scheduler; /* who schedules this connection */
304 __u32 ksnc_myipaddr; /* my IP */
305 __u32 ksnc_ipaddr; /* peer's IP */
306 int ksnc_port; /* peer's port */
307 signed int ksnc_type:3; /* type of connection,
308 * should be signed value */
309 unsigned int ksnc_closing:1; /* being shut down */
310 unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
311 unsigned int ksnc_zc_capable:1; /* enable to ZC */
312 struct ksock_proto *ksnc_proto; /* protocol for the connection */
316 /* where I enq waiting input or a forwarding descriptor */
317 struct list_head ksnc_rx_list;
318 cfs_time_t ksnc_rx_deadline; /* when (in jiffies) receive times out */
319 __u8 ksnc_rx_started; /* started receiving a message */
320 __u8 ksnc_rx_ready; /* data ready to read */
321 __u8 ksnc_rx_scheduled;/* being progressed */
322 __u8 ksnc_rx_state; /* what is being read */
323 int ksnc_rx_nob_left; /* # bytes to next hdr/body */
324 int ksnc_rx_nob_wanted; /* bytes actually wanted */
325 int ksnc_rx_niov; /* # iovec frags */
326 struct iovec *ksnc_rx_iov; /* the iovec frags */
327 int ksnc_rx_nkiov; /* # page frags */
328 lnet_kiov_t *ksnc_rx_kiov; /* the page frags */
329 ksock_rxiovspace_t ksnc_rx_iov_space;/* space for frag descriptors */
330 __u32 ksnc_rx_csum; /* partial checksum for incoming data */
331 void *ksnc_cookie; /* rx lnet_finalize passthru arg */
332 ksock_msg_t ksnc_msg; /* incoming message buffer:
333 * V2.x message takes the
335 * V1.x message is a bare
336 * lnet_hdr_t, it's stored in
337 * 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 ksock_tx_t *ksnc_tx_carrier;
346 /* when (in jiffies) tx times out */
347 cfs_time_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 cfs_time_t ksnc_tx_last_post;
360 typedef struct ksock_route
362 struct list_head ksnr_list; /* chain on peer route list */
363 struct list_head ksnr_connd_list; /* chain on ksnr_connd_routes */
364 struct ksock_peer *ksnr_peer; /* owning peer */
365 atomic_t ksnr_refcount; /* # users */
366 cfs_time_t ksnr_timeout; /* when (in jiffies) reconnection can happen next */
367 cfs_duration_t ksnr_retry_interval; /* how long between retries */
368 __u32 ksnr_myipaddr; /* my IP */
369 __u32 ksnr_ipaddr; /* IP address to connect to */
370 int ksnr_port; /* port to connect to */
371 unsigned int ksnr_scheduled:1; /* scheduled for attention */
372 unsigned int ksnr_connecting:1;/* connection establishment in progress */
373 unsigned int ksnr_connected:4; /* connections established by type */
374 unsigned int ksnr_deleted:1; /* been removed from peer? */
375 unsigned int ksnr_share_count; /* created explicitly? */
376 int ksnr_conn_count; /* # conns established by this route */
379 #define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
381 typedef struct ksock_peer
383 struct list_head ksnp_list; /* stash on global peer list */
384 cfs_time_t ksnp_last_alive; /* when (in jiffies) I was last alive */
385 lnet_process_id_t ksnp_id; /* who's on the other end(s) */
386 atomic_t ksnp_refcount; /* # users */
387 int ksnp_sharecount; /* lconf usage counter */
388 int ksnp_closing; /* being closed */
389 int ksnp_accepting;/* # passive connections pending */
390 int ksnp_error; /* errno on closing last conn */
391 __u64 ksnp_zc_next_cookie;/* ZC completion cookie */
392 __u64 ksnp_incarnation; /* latest known peer incarnation */
393 struct ksock_proto *ksnp_proto; /* latest known peer protocol */
394 struct list_head ksnp_conns; /* all active connections */
395 struct list_head ksnp_routes; /* routes */
396 struct list_head ksnp_tx_queue; /* waiting packets */
397 spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
398 /* zero copy requests wait for ACK */
399 struct list_head ksnp_zc_req_list;
400 cfs_time_t ksnp_send_keepalive; /* time to send keepalive */
401 lnet_ni_t *ksnp_ni; /* which network */
402 int ksnp_n_passive_ips; /* # of... */
403 __u32 ksnp_passive_ips[LNET_MAX_INTERFACES]; /* preferred local interfaces */
406 typedef struct ksock_connreq
408 /* stash on ksnd_connd_connreqs */
409 struct list_head ksncr_list;
412 /* accepted socket */
413 cfs_socket_t *ksncr_sock;
416 extern ksock_nal_data_t ksocknal_data;
417 extern ksock_tunables_t ksocknal_tunables;
419 #define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
420 #define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
421 #define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
423 typedef struct ksock_proto
425 int pro_version; /* version number of protocol */
426 int (*pro_send_hello)(ksock_conn_t *, ksock_hello_msg_t *); /* handshake function */
427 int (*pro_recv_hello)(ksock_conn_t *, ksock_hello_msg_t *, int);/* handshake function */
428 void (*pro_pack)(ksock_tx_t *); /* message pack */
429 void (*pro_unpack)(ksock_msg_t *); /* message unpack */
430 ksock_tx_t *(*pro_queue_tx_msg)(ksock_conn_t *, ksock_tx_t *); /* queue tx on the connection */
431 int (*pro_queue_tx_zcack)(ksock_conn_t *, ksock_tx_t *, __u64); /* queue ZC ack on the connection */
432 int (*pro_handle_zcreq)(ksock_conn_t *, __u64, int); /* handle ZC request */
433 int (*pro_handle_zcack)(ksock_conn_t *, __u64, __u64); /* handle ZC ACK */
434 int (*pro_match_tx)(ksock_conn_t *, ksock_tx_t *, int); /* msg type matches the connection type:
436 * return MATCH_NO : no
437 * return MATCH_YES : matching type
438 * return MATCH_MAY : can be backup */
441 extern ksock_proto_t ksocknal_protocol_v1x;
442 extern ksock_proto_t ksocknal_protocol_v2x;
443 extern ksock_proto_t ksocknal_protocol_v3x;
445 #define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
446 #define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
447 #define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
449 #ifndef CPU_MASK_NONE
450 #define CPU_MASK_NONE 0UL
454 ksocknal_route_mask(void)
456 if (!*ksocknal_tunables.ksnd_typed_conns)
457 return (1 << SOCKLND_CONN_ANY);
459 return ((1 << SOCKLND_CONN_CONTROL) |
460 (1 << SOCKLND_CONN_BULK_IN) |
461 (1 << SOCKLND_CONN_BULK_OUT));
464 static inline struct list_head *
465 ksocknal_nid2peerlist (lnet_nid_t nid)
467 unsigned int hash = ((unsigned int)nid) % ksocknal_data.ksnd_peer_hash_size;
469 return (&ksocknal_data.ksnd_peers [hash]);
473 ksocknal_conn_addref (ksock_conn_t *conn)
475 LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0);
476 atomic_inc(&conn->ksnc_conn_refcount);
479 extern void ksocknal_queue_zombie_conn (ksock_conn_t *conn);
480 extern void ksocknal_finalize_zcreq(ksock_conn_t *conn);
483 ksocknal_conn_decref (ksock_conn_t *conn)
485 LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0);
486 if (atomic_dec_and_test(&conn->ksnc_conn_refcount))
487 ksocknal_queue_zombie_conn(conn);
491 ksocknal_connsock_addref (ksock_conn_t *conn)
495 read_lock(&ksocknal_data.ksnd_global_lock);
496 if (!conn->ksnc_closing) {
497 LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0);
498 atomic_inc(&conn->ksnc_sock_refcount);
501 read_unlock(&ksocknal_data.ksnd_global_lock);
507 ksocknal_connsock_decref (ksock_conn_t *conn)
509 LASSERT (atomic_read(&conn->ksnc_sock_refcount) > 0);
510 if (atomic_dec_and_test(&conn->ksnc_sock_refcount)) {
511 LASSERT (conn->ksnc_closing);
512 libcfs_sock_release(conn->ksnc_sock);
513 conn->ksnc_sock = NULL;
514 ksocknal_finalize_zcreq(conn);
519 ksocknal_tx_addref (ksock_tx_t *tx)
521 LASSERT (atomic_read(&tx->tx_refcount) > 0);
522 atomic_inc(&tx->tx_refcount);
525 extern void ksocknal_tx_prep (ksock_conn_t *, ksock_tx_t *tx);
526 extern void ksocknal_tx_done (lnet_ni_t *ni, ksock_tx_t *tx);
529 ksocknal_tx_decref (ksock_tx_t *tx)
531 LASSERT (atomic_read(&tx->tx_refcount) > 0);
532 if (atomic_dec_and_test(&tx->tx_refcount))
533 ksocknal_tx_done(NULL, tx);
537 ksocknal_route_addref (ksock_route_t *route)
539 LASSERT (atomic_read(&route->ksnr_refcount) > 0);
540 atomic_inc(&route->ksnr_refcount);
543 extern void ksocknal_destroy_route (ksock_route_t *route);
546 ksocknal_route_decref (ksock_route_t *route)
548 LASSERT (atomic_read (&route->ksnr_refcount) > 0);
549 if (atomic_dec_and_test(&route->ksnr_refcount))
550 ksocknal_destroy_route (route);
554 ksocknal_peer_addref (ksock_peer_t *peer)
556 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
557 atomic_inc(&peer->ksnp_refcount);
560 extern void ksocknal_destroy_peer (ksock_peer_t *peer);
563 ksocknal_peer_decref (ksock_peer_t *peer)
565 LASSERT (atomic_read (&peer->ksnp_refcount) > 0);
566 if (atomic_dec_and_test(&peer->ksnp_refcount))
567 ksocknal_destroy_peer (peer);
570 int ksocknal_startup (lnet_ni_t *ni);
571 void ksocknal_shutdown (lnet_ni_t *ni);
572 int ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
573 int ksocknal_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
574 int ksocknal_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
575 int delayed, unsigned int niov,
576 struct iovec *iov, lnet_kiov_t *kiov,
577 unsigned int offset, unsigned int mlen, unsigned int rlen);
578 int ksocknal_accept(lnet_ni_t *ni, cfs_socket_t *sock);
580 extern int ksocknal_add_peer(lnet_ni_t *ni, lnet_process_id_t id, __u32 ip, int port);
581 extern ksock_peer_t *ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id);
582 extern ksock_peer_t *ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id);
583 extern void ksocknal_peer_failed (ksock_peer_t *peer);
584 extern int ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route,
585 cfs_socket_t *sock, int type);
586 extern void ksocknal_close_conn_locked (ksock_conn_t *conn, int why);
587 extern void ksocknal_terminate_conn (ksock_conn_t *conn);
588 extern void ksocknal_destroy_conn (ksock_conn_t *conn);
589 extern int ksocknal_close_peer_conns_locked (ksock_peer_t *peer,
590 __u32 ipaddr, int why);
591 extern int ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why);
592 extern int ksocknal_close_matching_conns(lnet_process_id_t id, __u32 ipaddr);
593 extern ksock_conn_t *ksocknal_find_conn_locked(ksock_peer_t *peer,
594 ksock_tx_t *tx, int nonblk);
596 extern int ksocknal_launch_packet(lnet_ni_t *ni, ksock_tx_t *tx,
597 lnet_process_id_t id);
598 extern ksock_tx_t *ksocknal_alloc_tx(int type, int size);
599 extern void ksocknal_free_tx (ksock_tx_t *tx);
600 extern ksock_tx_t *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
601 extern void ksocknal_next_tx_carrier(ksock_conn_t *conn);
602 extern void ksocknal_queue_tx_locked (ksock_tx_t *tx, ksock_conn_t *conn);
603 extern void ksocknal_txlist_done(lnet_ni_t *ni, struct list_head *txlist,
605 extern void ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive);
606 extern void ksocknal_query (struct lnet_ni *ni, lnet_nid_t nid, cfs_time_t *when);
607 extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
608 extern void ksocknal_thread_fini (void);
609 extern void ksocknal_launch_all_connections_locked (ksock_peer_t *peer);
610 extern ksock_route_t *ksocknal_find_connectable_route_locked (ksock_peer_t *peer);
611 extern ksock_route_t *ksocknal_find_connecting_route_locked (ksock_peer_t *peer);
612 extern int ksocknal_new_packet (ksock_conn_t *conn, int skip);
613 extern int ksocknal_scheduler (void *arg);
614 extern int ksocknal_connd (void *arg);
615 extern int ksocknal_reaper (void *arg);
616 extern int ksocknal_send_hello (lnet_ni_t *ni, ksock_conn_t *conn,
617 lnet_nid_t peer_nid, ksock_hello_msg_t *hello);
618 extern int ksocknal_recv_hello (lnet_ni_t *ni, ksock_conn_t *conn,
619 ksock_hello_msg_t *hello, lnet_process_id_t *id,
621 extern void ksocknal_read_callback(ksock_conn_t *conn);
622 extern void ksocknal_write_callback(ksock_conn_t *conn);
624 extern int ksocknal_lib_zc_capable(ksock_conn_t *conn);
625 extern void ksocknal_lib_save_callback(cfs_socket_t *sock, ksock_conn_t *conn);
626 extern void ksocknal_lib_set_callback(cfs_socket_t *sock, ksock_conn_t *conn);
627 extern void ksocknal_lib_reset_callback(cfs_socket_t *sock, ksock_conn_t *conn);
628 extern void ksocknal_lib_push_conn (ksock_conn_t *conn);
629 extern int ksocknal_lib_get_conn_addrs (ksock_conn_t *conn);
630 extern int ksocknal_lib_setup_sock (cfs_socket_t *so);
631 extern int ksocknal_lib_send_iov (ksock_conn_t *conn, ksock_tx_t *tx);
632 extern int ksocknal_lib_send_kiov (ksock_conn_t *conn, ksock_tx_t *tx);
633 extern void ksocknal_lib_eager_ack (ksock_conn_t *conn);
634 extern int ksocknal_lib_recv_iov (ksock_conn_t *conn);
635 extern int ksocknal_lib_recv_kiov (ksock_conn_t *conn);
636 extern int ksocknal_lib_get_conn_tunables (ksock_conn_t *conn, int *txmem,
637 int *rxmem, int *nagle);
639 extern int ksocknal_tunables_init(void);
640 extern void ksocknal_tunables_fini(void);
641 extern int ksocknal_lib_tunables_init(void);
642 extern void ksocknal_lib_tunables_fini(void);
644 extern void ksocknal_lib_csum_tx(ksock_tx_t *tx);
646 extern int ksocknal_lib_memory_pressure(ksock_conn_t *conn);
647 extern int ksocknal_lib_bind_thread_to_cpu(int id);