projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge remote-tracking branch 'staging/staging-next'
[deliverable/linux.git] / drivers / staging / lustre / lnet / klnds / socklnd / socklnd.h
CommitLineData
d7e09d03
PT		 1/*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 *
4 * Copyright (c) 2011, 2012, Intel Corporation.
5 *
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>
10 *
11 * This file is part of Lustre, http://www.lustre.org
12 *
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.
16 *
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.
21 *
d7e09d03
PT		 22 */
23
12c41f00
JH		 24#ifndef _SOCKLND_SOCKLND_H_
25#define _SOCKLND_SOCKLND_H_
26
d7e09d03
PT		 27#define DEBUG_PORTAL_ALLOC
28#define DEBUG_SUBSYSTEM S_LND
29
12c41f00
JH		 30#include <linux/crc32.h>
31#include <linux/errno.h>
32#include <linux/if.h>
33#include <linux/init.h>
34#include <linux/kernel.h>
35#include <linux/kmod.h>
36#include <linux/list.h>
37#include <linux/mm.h>
38#include <linux/module.h>
39#include <linux/stat.h>
40#include <linux/string.h>
41#include <linux/syscalls.h>
42#include <linux/sysctl.h>
43#include <linux/uio.h>
44#include <linux/unistd.h>
a82de7ea 45#include <asm/irq.h>
12c41f00
JH		 46#include <net/sock.h>
47#include <net/tcp.h>
d7e09d03 48
9fdaf8c0
GKH		 49#include "../../../include/linux/libcfs/libcfs.h"
50#include "../../../include/linux/lnet/lnet.h"
51#include "../../../include/linux/lnet/lib-lnet.h"
52#include "../../../include/linux/lnet/socklnd.h"
d7e09d03 53
12c41f00
JH		 54/* assume one thread for each connection type */
55#define SOCKNAL_NSCHEDS 3
56#define SOCKNAL_NSCHEDS_HIGH (SOCKNAL_NSCHEDS << 1)
57
97d10d0a
MS		 58#define SOCKNAL_PEER_HASH_SIZE 101 /* # peer lists */
59#define SOCKNAL_RESCHED 100 /* # scheduler loops before reschedule */
60#define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */
61#define SOCKNAL_ENOMEM_RETRY CFS_TICK /* jiffies between retries */
d7e09d03 62
97d10d0a
MS		 63#define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
64#define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
d7e09d03 65
97d10d0a 66#define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
d7e09d03 67
4420cfd3
JS		 68/*
69 * risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
70 * no risk if we're not running on a CONFIG_HIGHMEM platform.
71 */
d7e09d03
PT		 72#ifdef CONFIG_HIGHMEM
73# define SOCKNAL_RISK_KMAP_DEADLOCK 0
74#else
75# define SOCKNAL_RISK_KMAP_DEADLOCK 1
76#endif
77
78struct ksock_sched_info;
79
ff13fd40 80struct ksock_sched { /* per scheduler state */
97d10d0a
MS		 81 spinlock_t kss_lock; /* serialise */
82 struct list_head kss_rx_conns; /* conn waiting to be read */
83 struct list_head kss_tx_conns; /* conn waiting to be written */
84 struct list_head kss_zombie_noop_txs; /* zombie noop tx list */
85 wait_queue_head_t kss_waitq; /* where scheduler sleeps */
86 int kss_nconns; /* # connections assigned to
87 * this scheduler */
88 struct ksock_sched_info *kss_info; /* owner of it */
ff13fd40 89};
d7e09d03
PT		 90
91struct ksock_sched_info {
97d10d0a
MS		 92 int ksi_nthreads_max; /* max allowed threads */
93 int ksi_nthreads; /* number of threads */
94 int ksi_cpt; /* CPT id */
ff13fd40 95 struct ksock_sched *ksi_scheds; /* array of schedulers */
d7e09d03
PT		 96};
97
97d10d0a
MS		 98#define KSOCK_CPT_SHIFT 16
99#define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
100#define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
101#define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
d7e09d03 102
ff13fd40 103struct ksock_interface { /* in-use interface */
d7e09d03
PT		 104 __u32 ksni_ipaddr; /* interface's IP address */
105 __u32 ksni_netmask; /* interface's network mask */
106 int ksni_nroutes; /* # routes using (active) */
107 int ksni_npeers; /* # peers using (passive) */
108 char ksni_name[IFNAMSIZ]; /* interface name */
ff13fd40 109};
d7e09d03 110
ff13fd40 111struct ksock_tunables {
97d10d0a
MS		 112 int *ksnd_timeout; /* "stuck" socket timeout
113 * (seconds) */
114 int *ksnd_nscheds; /* # scheduler threads in each
115 * pool while starting */
116 int *ksnd_nconnds; /* # connection daemons */
117 int *ksnd_nconnds_max; /* max # connection daemons */
118 int *ksnd_min_reconnectms; /* first connection retry after
119 * (ms)... */
120 int *ksnd_max_reconnectms; /* ...exponentially increasing to
121 * this */
122 int *ksnd_eager_ack; /* make TCP ack eagerly? */
123 int *ksnd_typed_conns; /* drive sockets by type? */
124 int *ksnd_min_bulk; /* smallest "large" message */
125 int *ksnd_tx_buffer_size; /* socket tx buffer size */
126 int *ksnd_rx_buffer_size; /* socket rx buffer size */
127 int *ksnd_nagle; /* enable NAGLE? */
128 int *ksnd_round_robin; /* round robin for multiple
129 * interfaces */
130 int *ksnd_keepalive; /* # secs for sending keepalive
131 * NOOP */
132 int *ksnd_keepalive_idle; /* # idle secs before 1st probe
133 */
134 int *ksnd_keepalive_count; /* # probes */
135 int *ksnd_keepalive_intvl; /* time between probes */
136 int *ksnd_credits; /* # concurrent sends */
137 int *ksnd_peertxcredits; /* # concurrent sends to 1 peer
138 */
139 int *ksnd_peerrtrcredits; /* # per-peer router buffer
140 * credits */
141 int *ksnd_peertimeout; /* seconds to consider peer dead
142 */
143 int *ksnd_enable_csum; /* enable check sum */
144 int *ksnd_inject_csum_error; /* set non-zero to inject
145 * checksum error */
146 int *ksnd_nonblk_zcack; /* always send zc-ack on
147 * non-blocking connection */
148 unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload
149 * size */
150 int *ksnd_zc_recv; /* enable ZC receive (for
151 * Chelsio TOE) */
152 int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to
153 * enable ZC receive */
ff13fd40 154};
d7e09d03 155
ff13fd40 156struct ksock_net {
d7e09d03
PT		 157 __u64 ksnn_incarnation; /* my epoch */
158 spinlock_t ksnn_lock; /* serialise */
159 struct list_head ksnn_list; /* chain on global list */
160 int ksnn_npeers; /* # peers */
161 int ksnn_shutdown; /* shutting down? */
162 int ksnn_ninterfaces; /* IP interfaces */
ff13fd40
JS		 163 struct ksock_interface ksnn_interfaces[LNET_MAX_INTERFACES];
164};
d7e09d03
PT		 165
166/** connd timeout */
167#define SOCKNAL_CONND_TIMEOUT 120
168/** reserved thread for accepting & creating new connd */
169#define SOCKNAL_CONND_RESV 1
170
ff13fd40 171struct ksock_nal_data {
97d10d0a
MS		 172 int ksnd_init; /* initialisation state
173 */
174 int ksnd_nnets; /* # networks set up */
175 struct list_head ksnd_nets; /* list of nets */
176 rwlock_t ksnd_global_lock; /* stabilize peer/conn
177 * ops */
178 struct list_head *ksnd_peers; /* hash table of all my
179 * known peers */
180 int ksnd_peer_hash_size; /* size of ksnd_peers */
181
182 int ksnd_nthreads; /* # live threads */
183 int ksnd_shuttingdown; /* tell threads to exit
184 */
185 struct ksock_sched_info **ksnd_sched_info; /* schedulers info */
186
187 atomic_t ksnd_nactive_txs; /* #active txs */
188
189 struct list_head ksnd_deathrow_conns; /* conns to close:
190 * reaper_lock*/
191 struct list_head ksnd_zombie_conns; /* conns to free:
192 * reaper_lock */
193 struct list_head ksnd_enomem_conns; /* conns to retry:
194 * reaper_lock*/
195 wait_queue_head_t ksnd_reaper_waitq; /* reaper sleeps here */
196 unsigned long ksnd_reaper_waketime; /* when reaper will wake
197 */
198 spinlock_t ksnd_reaper_lock; /* serialise */
199
200 int ksnd_enomem_tx; /* test ENOMEM sender */
201 int ksnd_stall_tx; /* test sluggish sender
202 */
203 int ksnd_stall_rx; /* test sluggish
204 * receiver */
205
206 struct list_head ksnd_connd_connreqs; /* incoming connection
207 * requests */
208 struct list_head ksnd_connd_routes; /* routes waiting to be
209 * connected */
210 wait_queue_head_t ksnd_connd_waitq; /* connds sleep here */
211 int ksnd_connd_connecting; /* # connds connecting
212 */
74ad578f 213 time64_t ksnd_connd_failed_stamp;/* time stamp of the
97d10d0a
MS		 214 * last failed
215 * connecting attempt */
74ad578f 216 time64_t ksnd_connd_starting_stamp;/* time stamp of the
97d10d0a
MS		 217 * last starting connd
218 */
74ad578f 219 unsigned ksnd_connd_starting; /* # starting connd */
97d10d0a
MS		 220 unsigned ksnd_connd_running; /* # running connd */
221 spinlock_t ksnd_connd_lock; /* serialise */
222
223 struct list_head ksnd_idle_noop_txs; /* list head for freed
224 * noop tx */
225 spinlock_t ksnd_tx_lock; /* serialise, g_lock
226 * unsafe */
d7e09d03 227
ff13fd40 228};
d7e09d03 229
97d10d0a
MS		 230#define SOCKNAL_INIT_NOTHING 0
231#define SOCKNAL_INIT_DATA 1
232#define SOCKNAL_INIT_ALL 2
d7e09d03 233
4420cfd3
JS		 234/*
235 * A packet just assembled for transmission is represented by 1 or more
d7e09d03
PT		 236 * struct iovec fragments (the first frag contains the portals header),
237 * followed by 0 or more lnet_kiov_t fragments.
238 *
239 * On the receive side, initially 1 struct iovec fragment is posted for
240 * receive (the header). Once the header has been received, the payload is
241 * received into either struct iovec or lnet_kiov_t fragments, depending on
4420cfd3
JS		 242 * what the header matched or whether the message needs forwarding.
243 */
97d10d0a
MS		 244struct ksock_conn; /* forward ref */
245struct ksock_peer; /* forward ref */
246struct ksock_route; /* forward ref */
247struct ksock_proto; /* forward ref */
d7e09d03 248
ff13fd40 249struct ksock_tx { /* transmit packet */
97d10d0a
MS		 250 struct list_head tx_list; /* queue on conn for transmission etc
251 */
252 struct list_head tx_zc_list; /* queue on peer for ZC request */
253 atomic_t tx_refcount; /* tx reference count */
254 int tx_nob; /* # packet bytes */
255 int tx_resid; /* residual bytes */
256 int tx_niov; /* # packet iovec frags */
257 struct kvec *tx_iov; /* packet iovec 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 lnet_kiov_t *tx_kiov; /* packet page frags */
264 struct ksock_conn *tx_conn; /* owning conn */
265 lnet_msg_t *tx_lnetmsg; /* lnet message for lnet_finalize()
266 */
267 unsigned long tx_deadline; /* when (in jiffies) tx times out */
268 ksock_msg_t tx_msg; /* socklnd message buffer */
269 int tx_desc_size; /* size of this descriptor */
d7e09d03
PT		 270 union {
271 struct {
97d10d0a
MS		 272 struct kvec iov; /* virt hdr */
273 lnet_kiov_t kiov[0]; /* paged payload */
274 } paged;
d7e09d03 275 struct {
97d10d0a
MS		 276 struct kvec iov[1]; /* virt hdr + payload */
277 } virt;
278 } tx_frags;
ff13fd40 279};
d7e09d03 280
ff13fd40 281#define KSOCK_NOOP_TX_SIZE (offsetof(struct ksock_tx, tx_frags.paged.kiov[0]))
d7e09d03 282
ff13fd40 283/* network zero copy callback descriptor embedded in struct ksock_tx */
d7e09d03 284
4420cfd3
JS		 285/*
286 * space for the rx frag descriptors; we either read a single contiguous
287 * header, or up to LNET_MAX_IOV frags of payload of either type.
288 */
ff13fd40 289union ksock_rxiovspace {
f351bad2 290 struct kvec iov[LNET_MAX_IOV];
d7e09d03 291 lnet_kiov_t kiov[LNET_MAX_IOV];
ff13fd40 292};
d7e09d03 293
97d10d0a
MS		 294#define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
295#define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
296#define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
297#define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
298#define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
299#define SOCKNAL_RX_SLOP 6 /* skipping body */
d7e09d03 300
ff13fd40 301struct ksock_conn {
97d10d0a
MS		 302 struct ksock_peer *ksnc_peer; /* owning peer */
303 struct ksock_route *ksnc_route; /* owning route */
304 struct list_head ksnc_list; /* stash on peer's conn list */
305 struct socket *ksnc_sock; /* actual socket */
306 void *ksnc_saved_data_ready; /* socket's original
307 * data_ready() callback */
308 void *ksnc_saved_write_space; /* socket's original
309 * write_space() callback */
310 atomic_t ksnc_conn_refcount;/* conn refcount */
311 atomic_t ksnc_sock_refcount;/* sock refcount */
ff13fd40
JS		 312 struct ksock_sched *ksnc_scheduler; /* who schedules this connection
313 */
97d10d0a
MS		 314 __u32 ksnc_myipaddr; /* my IP */
315 __u32 ksnc_ipaddr; /* peer's IP */
316 int ksnc_port; /* peer's port */
317 signed int ksnc_type:3; /* type of connection, should be
318 * signed value */
319 unsigned int ksnc_closing:1; /* being shut down */
320 unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
321 unsigned int ksnc_zc_capable:1; /* enable to ZC */
322 struct ksock_proto *ksnc_proto; /* protocol for the connection */
d7e09d03
PT		 323
324 /* reader */
97d10d0a
MS		 325 struct list_head ksnc_rx_list; /* where I enq waiting input or a
326 * forwarding descriptor */
327 unsigned long ksnc_rx_deadline; /* when (in jiffies) receive times
328 * out */
329 __u8 ksnc_rx_started; /* started receiving a message */
330 __u8 ksnc_rx_ready; /* data ready to read */
331 __u8 ksnc_rx_scheduled; /* being progressed */
332 __u8 ksnc_rx_state; /* what is being read */
333 int ksnc_rx_nob_left; /* # bytes to next hdr/body */
334 int ksnc_rx_nob_wanted;/* bytes actually wanted */
335 int ksnc_rx_niov; /* # iovec frags */
336 struct kvec *ksnc_rx_iov; /* the iovec frags */
337 int ksnc_rx_nkiov; /* # page frags */
338 lnet_kiov_t *ksnc_rx_kiov; /* the page frags */
ff13fd40 339 union ksock_rxiovspace ksnc_rx_iov_space; /* space for frag descriptors */
97d10d0a
MS		 340 __u32 ksnc_rx_csum; /* partial checksum for incoming
341 * data */
342 void *ksnc_cookie; /* rx lnet_finalize passthru arg
343 */
344 ksock_msg_t ksnc_msg; /* incoming message buffer:
345 * V2.x message takes the
346 * whole struct
347 * V1.x message is a bare
348 * lnet_hdr_t, it's stored in
349 * ksnc_msg.ksm_u.lnetmsg */
d7e09d03
PT		 350
351 /* WRITER */
97d10d0a
MS		 352 struct list_head ksnc_tx_list; /* where I enq waiting for output
353 * space */
354 struct list_head ksnc_tx_queue; /* packets waiting to be sent */
ff13fd40 355 struct ksock_tx *ksnc_tx_carrier; /* next TX that can carry a LNet
97d10d0a
MS		 356 * message or ZC-ACK */
357 unsigned long ksnc_tx_deadline; /* when (in jiffies) tx times out
358 */
359 int ksnc_tx_bufnob; /* send buffer marker */
360 atomic_t ksnc_tx_nob; /* # bytes queued */
361 int ksnc_tx_ready; /* write space */
362 int ksnc_tx_scheduled; /* being progressed */
363 unsigned long ksnc_tx_last_post; /* time stamp of the last posted
364 * TX */
ff13fd40 365};
d7e09d03 366
ff13fd40 367struct ksock_route {
97d10d0a
MS		 368 struct list_head ksnr_list; /* chain on peer route list */
369 struct list_head ksnr_connd_list; /* chain on ksnr_connd_routes */
370 struct ksock_peer *ksnr_peer; /* owning peer */
371 atomic_t ksnr_refcount; /* # users */
372 unsigned long ksnr_timeout; /* when (in jiffies) reconnection
373 * can happen next */
374 long ksnr_retry_interval; /* how long between retries */
375 __u32 ksnr_myipaddr; /* my IP */
376 __u32 ksnr_ipaddr; /* IP address to connect to */
377 int ksnr_port; /* port to connect to */
378 unsigned int ksnr_scheduled:1; /* scheduled for attention */
379 unsigned int ksnr_connecting:1; /* connection establishment in
380 * progress */
381 unsigned int ksnr_connected:4; /* connections established by
382 * type */
383 unsigned int ksnr_deleted:1; /* been removed from peer? */
384 unsigned int ksnr_share_count; /* created explicitly? */
385 int ksnr_conn_count; /* # conns established by this
386 * route */
ff13fd40 387};
d7e09d03 388
97d10d0a 389#define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
d7e09d03 390
ff13fd40 391struct ksock_peer {
97d10d0a
MS		 392 struct list_head ksnp_list; /* stash on global peer list */
393 unsigned long ksnp_last_alive; /* when (in jiffies) I was last
394 * alive */
395 lnet_process_id_t ksnp_id; /* who's on the other end(s) */
396 atomic_t ksnp_refcount; /* # users */
397 int ksnp_sharecount; /* lconf usage counter */
398 int ksnp_closing; /* being closed */
399 int ksnp_accepting; /* # passive connections pending
400 */
401 int ksnp_error; /* errno on closing last conn */
402 __u64 ksnp_zc_next_cookie; /* ZC completion cookie */
403 __u64 ksnp_incarnation; /* latest known peer incarnation
404 */
405 struct ksock_proto *ksnp_proto; /* latest known peer protocol */
406 struct list_head ksnp_conns; /* all active connections */
407 struct list_head ksnp_routes; /* routes */
408 struct list_head ksnp_tx_queue; /* waiting packets */
409 spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
410 struct list_head ksnp_zc_req_list; /* zero copy requests wait for
411 * ACK */
412 unsigned long ksnp_send_keepalive; /* time to send keepalive */
413 lnet_ni_t *ksnp_ni; /* which network */
414 int ksnp_n_passive_ips; /* # of... */
415
416 /* preferred local interfaces */
417 __u32 ksnp_passive_ips[LNET_MAX_INTERFACES];
ff13fd40 418};
d7e09d03 419
ff13fd40 420struct ksock_connreq {
97d10d0a
MS		 421 struct list_head ksncr_list; /* stash on ksnd_connd_connreqs */
422 lnet_ni_t *ksncr_ni; /* chosen NI */
423 struct socket *ksncr_sock; /* accepted socket */
ff13fd40 424};
d7e09d03 425
ff13fd40
JS		 426extern struct ksock_nal_data ksocknal_data;
427extern struct ksock_tunables ksocknal_tunables;
d7e09d03 428
97d10d0a
MS		 429#define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
430#define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
431#define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not
432 * preferred */
d7e09d03 433
ff13fd40 434struct ksock_proto {
97d10d0a
MS		 435 /* version number of protocol */
436 int pro_version;
437
438 /* handshake function */
ff13fd40 439 int (*pro_send_hello)(struct ksock_conn *, ksock_hello_msg_t *);
97d10d0a
MS		 440
441 /* handshake function */
ff13fd40 442 int (*pro_recv_hello)(struct ksock_conn *, ksock_hello_msg_t *, int);
97d10d0a
MS		 443
444 /* message pack */
ff13fd40 445 void (*pro_pack)(struct ksock_tx *);
97d10d0a
MS		 446
447 /* message unpack */
448 void (*pro_unpack)(ksock_msg_t *);
449
450 /* queue tx on the connection */
ff13fd40 451 struct ksock_tx *(*pro_queue_tx_msg)(struct ksock_conn *, struct ksock_tx *);
97d10d0a
MS		 452
453 /* queue ZC ack on the connection */
ff13fd40 454 int (*pro_queue_tx_zcack)(struct ksock_conn *, struct ksock_tx *, __u64);
97d10d0a
MS		 455
456 /* handle ZC request */
ff13fd40 457 int (*pro_handle_zcreq)(struct ksock_conn *, __u64, int);
97d10d0a
MS		 458
459 /* handle ZC ACK */
ff13fd40 460 int (*pro_handle_zcack)(struct ksock_conn *, __u64, __u64);
97d10d0a 461
4420cfd3
JS		 462 /*
463 * msg type matches the connection type:
97d10d0a
MS		 464 * return value:
465 * return MATCH_NO : no
466 * return MATCH_YES : matching type
4420cfd3
JS		 467 * return MATCH_MAY : can be backup
468 */
ff13fd40
JS		 469 int (*pro_match_tx)(struct ksock_conn *, struct ksock_tx *, int);
470};
d7e09d03 471
ff13fd40
JS		 472extern struct ksock_proto ksocknal_protocol_v1x;
473extern struct ksock_proto ksocknal_protocol_v2x;
474extern struct ksock_proto ksocknal_protocol_v3x;
d7e09d03 475
97d10d0a
MS		 476#define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
477#define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
478#define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
d7e09d03
PT		 479
480#ifndef CPU_MASK_NONE
481#define CPU_MASK_NONE 0UL
482#endif
483
12c41f00
JH		 484static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
485{
486#if 1
487 return crc32_le(crc, p, len);
488#else
489 while (len-- > 0)
490 crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ;
491 return crc;
492#endif
493}
494
d7e09d03
PT		 495static inline int
496ksocknal_route_mask(void)
497{
498 if (!*ksocknal_tunables.ksnd_typed_conns)
499 return (1 << SOCKLND_CONN_ANY);
500
501 return ((1 << SOCKLND_CONN_CONTROL) |
502 (1 << SOCKLND_CONN_BULK_IN) |
503 (1 << SOCKLND_CONN_BULK_OUT));
504}
505
506static inline struct list_head *
d9dfb48f 507ksocknal_nid2peerlist(lnet_nid_t nid)
d7e09d03
PT		 508{
509 unsigned int hash = ((unsigned int)nid) % ksocknal_data.ksnd_peer_hash_size;
510
71397095 511 return &ksocknal_data.ksnd_peers[hash];
d7e09d03
PT		 512}
513
514static inline void
ff13fd40 515ksocknal_conn_addref(struct ksock_conn *conn)
d7e09d03 516{
d9dfb48f 517 LASSERT(atomic_read(&conn->ksnc_conn_refcount) > 0);
d7e09d03
PT		 518 atomic_inc(&conn->ksnc_conn_refcount);
519}
520
ff13fd40
JS		 521void ksocknal_queue_zombie_conn(struct ksock_conn *conn);
522void ksocknal_finalize_zcreq(struct ksock_conn *conn);
d7e09d03
PT		 523
524static inline void
ff13fd40 525ksocknal_conn_decref(struct ksock_conn *conn)
d7e09d03 526{
d9dfb48f 527 LASSERT(atomic_read(&conn->ksnc_conn_refcount) > 0);
d7e09d03
PT		 528 if (atomic_dec_and_test(&conn->ksnc_conn_refcount))
529 ksocknal_queue_zombie_conn(conn);
530}
531
532static inline int
ff13fd40 533ksocknal_connsock_addref(struct ksock_conn *conn)
d7e09d03 534{
97d10d0a 535 int rc = -ESHUTDOWN;
d7e09d03
PT		 536
537 read_lock(&ksocknal_data.ksnd_global_lock);
538 if (!conn->ksnc_closing) {
539 LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0);
540 atomic_inc(&conn->ksnc_sock_refcount);
541 rc = 0;
542 }
543 read_unlock(&ksocknal_data.ksnd_global_lock);
544
71397095 545 return rc;
d7e09d03
PT		 546}
547
548static inline void
ff13fd40 549ksocknal_connsock_decref(struct ksock_conn *conn)
d7e09d03 550{
d9dfb48f 551 LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0);
d7e09d03 552 if (atomic_dec_and_test(&conn->ksnc_sock_refcount)) {
d9dfb48f 553 LASSERT(conn->ksnc_closing);
e52fc91d 554 sock_release(conn->ksnc_sock);
d7e09d03
PT		 555 conn->ksnc_sock = NULL;
556 ksocknal_finalize_zcreq(conn);
557 }
558}
559
560static inline void
ff13fd40 561ksocknal_tx_addref(struct ksock_tx *tx)
d7e09d03 562{
d9dfb48f 563 LASSERT(atomic_read(&tx->tx_refcount) > 0);
d7e09d03
PT		 564 atomic_inc(&tx->tx_refcount);
565}
566
ff13fd40
JS		 567void ksocknal_tx_prep(struct ksock_conn *, struct ksock_tx *tx);
568void ksocknal_tx_done(lnet_ni_t *ni, struct ksock_tx *tx);
d7e09d03
PT		 569
570static inline void
ff13fd40 571ksocknal_tx_decref(struct ksock_tx *tx)
d7e09d03 572{
d9dfb48f 573 LASSERT(atomic_read(&tx->tx_refcount) > 0);
d7e09d03
PT		 574 if (atomic_dec_and_test(&tx->tx_refcount))
575 ksocknal_tx_done(NULL, tx);
576}
577
578static inline void
ff13fd40 579ksocknal_route_addref(struct ksock_route *route)
d7e09d03 580{
d9dfb48f 581 LASSERT(atomic_read(&route->ksnr_refcount) > 0);
d7e09d03
PT		 582 atomic_inc(&route->ksnr_refcount);
583}
584
ff13fd40 585void ksocknal_destroy_route(struct ksock_route *route);
d7e09d03
PT		 586
587static inline void
ff13fd40 588ksocknal_route_decref(struct ksock_route *route)
d7e09d03 589{
d9dfb48f 590 LASSERT(atomic_read(&route->ksnr_refcount) > 0);
d7e09d03 591 if (atomic_dec_and_test(&route->ksnr_refcount))
d9dfb48f 592 ksocknal_destroy_route(route);
d7e09d03
PT		 593}
594
595static inline void
ff13fd40 596ksocknal_peer_addref(struct ksock_peer *peer)
d7e09d03 597{
d9dfb48f 598 LASSERT(atomic_read(&peer->ksnp_refcount) > 0);
d7e09d03
PT		 599 atomic_inc(&peer->ksnp_refcount);
600}
601
ff13fd40 602void ksocknal_destroy_peer(struct ksock_peer *peer);
d7e09d03
PT		 603
604static inline void
ff13fd40 605ksocknal_peer_decref(struct ksock_peer *peer)
d7e09d03 606{
d9dfb48f 607 LASSERT(atomic_read(&peer->ksnp_refcount) > 0);
d7e09d03 608 if (atomic_dec_and_test(&peer->ksnp_refcount))
d9dfb48f 609 ksocknal_destroy_peer(peer);
d7e09d03
PT		 610}
611
d9dfb48f
AD		 612int ksocknal_startup(lnet_ni_t *ni);
613void ksocknal_shutdown(lnet_ni_t *ni);
d7e09d03 614int ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
d9dfb48f 615int ksocknal_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
d7e09d03 616int ksocknal_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg,
c1b7b8eb 617 int delayed, struct iov_iter *to, unsigned int rlen);
e327dc88 618int ksocknal_accept(lnet_ni_t *ni, struct socket *sock);
d7e09d03 619
8150a97f 620int ksocknal_add_peer(lnet_ni_t *ni, lnet_process_id_t id, __u32 ip, int port);
ff13fd40
JS		 621struct ksock_peer *ksocknal_find_peer_locked(lnet_ni_t *ni, lnet_process_id_t id);
622struct ksock_peer *ksocknal_find_peer(lnet_ni_t *ni, lnet_process_id_t id);
623void ksocknal_peer_failed(struct ksock_peer *peer);
624int ksocknal_create_conn(lnet_ni_t *ni, struct ksock_route *route,
8150a97f 625 struct socket *sock, int type);
ff13fd40
JS		 626void ksocknal_close_conn_locked(struct ksock_conn *conn, int why);
627void ksocknal_terminate_conn(struct ksock_conn *conn);
628void ksocknal_destroy_conn(struct ksock_conn *conn);
629int ksocknal_close_peer_conns_locked(struct ksock_peer *peer,
8150a97f 630 __u32 ipaddr, int why);
ff13fd40 631int ksocknal_close_conn_and_siblings(struct ksock_conn *conn, int why);
8150a97f 632int ksocknal_close_matching_conns(lnet_process_id_t id, __u32 ipaddr);
ff13fd40 633struct ksock_conn *ksocknal_find_conn_locked(struct ksock_peer *peer,
24c198e9 634 struct ksock_tx *tx, int nonblk);
8150a97f 635
ff13fd40 636int ksocknal_launch_packet(lnet_ni_t *ni, struct ksock_tx *tx,
8150a97f 637 lnet_process_id_t id);
ff13fd40
JS		 638struct ksock_tx *ksocknal_alloc_tx(int type, int size);
639void ksocknal_free_tx(struct ksock_tx *tx);
640struct ksock_tx *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
641void ksocknal_next_tx_carrier(struct ksock_conn *conn);
642void ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn);
8150a97f
JP		 643void ksocknal_txlist_done(lnet_ni_t *ni, struct list_head *txlist, int error);
644void ksocknal_notify(lnet_ni_t *ni, lnet_nid_t gw_nid, int alive);
645void ksocknal_query(struct lnet_ni *ni, lnet_nid_t nid, unsigned long *when);
646int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name);
647void ksocknal_thread_fini(void);
ff13fd40
JS		 648void ksocknal_launch_all_connections_locked(struct ksock_peer *peer);
649struct ksock_route *ksocknal_find_connectable_route_locked(struct ksock_peer *peer);
650struct ksock_route *ksocknal_find_connecting_route_locked(struct ksock_peer *peer);
651int ksocknal_new_packet(struct ksock_conn *conn, int skip);
8150a97f
JP		 652int ksocknal_scheduler(void *arg);
653int ksocknal_connd(void *arg);
654int ksocknal_reaper(void *arg);
ff13fd40 655int ksocknal_send_hello(lnet_ni_t *ni, struct ksock_conn *conn,
8150a97f 656 lnet_nid_t peer_nid, ksock_hello_msg_t *hello);
ff13fd40 657int ksocknal_recv_hello(lnet_ni_t *ni, struct ksock_conn *conn,
8150a97f
JP		 658 ksock_hello_msg_t *hello, lnet_process_id_t *id,
659 __u64 *incarnation);
ff13fd40
JS		 660void ksocknal_read_callback(struct ksock_conn *conn);
661void ksocknal_write_callback(struct ksock_conn *conn);
662
663int ksocknal_lib_zc_capable(struct ksock_conn *conn);
664void ksocknal_lib_save_callback(struct socket *sock, struct ksock_conn *conn);
665void ksocknal_lib_set_callback(struct socket *sock, struct ksock_conn *conn);
666void ksocknal_lib_reset_callback(struct socket *sock, struct ksock_conn *conn);
667void ksocknal_lib_push_conn(struct ksock_conn *conn);
668int ksocknal_lib_get_conn_addrs(struct ksock_conn *conn);
8150a97f 669int ksocknal_lib_setup_sock(struct socket *so);
ff13fd40
JS		 670int ksocknal_lib_send_iov(struct ksock_conn *conn, struct ksock_tx *tx);
671int ksocknal_lib_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx);
672void ksocknal_lib_eager_ack(struct ksock_conn *conn);
673int ksocknal_lib_recv_iov(struct ksock_conn *conn);
674int ksocknal_lib_recv_kiov(struct ksock_conn *conn);
675int ksocknal_lib_get_conn_tunables(struct ksock_conn *conn, int *txmem,
8150a97f
JP		 676 int *rxmem, int *nagle);
677
ff13fd40
JS		 678void ksocknal_read_callback(struct ksock_conn *conn);
679void ksocknal_write_callback(struct ksock_conn *conn);
ee98e442 680
8150a97f
JP		 681int ksocknal_tunables_init(void);
682
ff13fd40 683void ksocknal_lib_csum_tx(struct ksock_tx *tx);
8150a97f 684
ff13fd40 685int ksocknal_lib_memory_pressure(struct ksock_conn *conn);
8150a97f 686int ksocknal_lib_bind_thread_to_cpu(int id);
12c41f00
JH		 687
688#endif /* _SOCKLND_SOCKLND_H_ */
Linux kernel - Deliverables
This page took 0.612148 seconds and 5 git commands to generate.