Viewing: socklnd.h
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/* This file is part of Lustre, http://www.lustre.org
*
* Author: Zach Brown <zab@zabbo.net>
* Author: Peter J. Braam <braam@clusterfs.com>
* Author: Phil Schwan <phil@clusterfs.com>
* Author: Eric Barton <eric@bartonsoftware.com>
*/
#ifndef _SOCKLND_SOCKLND_H_
#define _SOCKLND_SOCKLND_H_
#define DEBUG_PORTAL_ALLOC
#define DEBUG_SUBSYSTEM S_LND
#include <linux/crc32.h>
#include <linux/errno.h>
#include <linux/if.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/refcount.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/uio.h>
#include <linux/unistd.h>
#include <linux/hashtable.h>
#include <lustre_compat/net/sock.h>
#include <lustre_compat/net/tcp.h>
#include <linux/libcfs/libcfs.h>
#include <linux/lnet/lib-lnet.h>
#include "socklnd-idl.h"
/* assume one thread for each connection type */
#define SOCKNAL_NSCHEDS 3
#define SOCKNAL_NSCHEDS_HIGH (SOCKNAL_NSCHEDS << 1)
#define SOCKNAL_PEER_HASH_BITS 7 /* log2 of # peer_ni lists */
#define SOCKNAL_ENOMEM_RETRY 1 /* seconds between retries */
#define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */
#define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */
#define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */
/* risk kmap deadlock on multi-frag I/O (backs off to single-frag if disabled).
* no risk if we're not running on a CONFIG_HIGHMEM platform.
*/
#ifdef CONFIG_HIGHMEM
# define SOCKNAL_RISK_KMAP_DEADLOCK 0
#else
# define SOCKNAL_RISK_KMAP_DEADLOCK 1
#endif
enum ksocklnd_ni_lnd_tunables_attr {
LNET_NET_SOCKLND_TUNABLES_ATTR_UNSPEC = 0,
LNET_NET_SOCKLND_TUNABLES_ATTR_CONNS_PER_PEER,
LNET_NET_SOCKLND_TUNABLES_ATTR_LND_TIMEOUT,
LNET_NET_SOCKLND_TUNABLES_ATTR_LND_TOS,
__LNET_NET_SOCKLND_TUNABLES_ATTR_MAX_PLUS_ONE,
};
#define LNET_NET_SOCKLND_TUNABLES_ATTR_MAX (__LNET_NET_SOCKLND_TUNABLES_ATTR_MAX_PLUS_ONE - 1)
/* per scheduler state */
struct ksock_sched {
/* serialise */
spinlock_t kss_lock;
/* conn waiting to be written */
struct list_head kss_rx_conns;
struct list_head kss_tx_conns;
/* zombie noop tx list */
struct list_head kss_zombie_noop_txs;
/* where scheduler sleeps */
wait_queue_head_t kss_waitq;
/* # connections assigned to this scheduler */
int kss_nconns;
/* max allowed threads */
int kss_nthreads_max;
/* number of threads */
int kss_nthreads;
/* CPT id */
int kss_cpt;
};
#define KSOCK_CPT_SHIFT 16
#define KSOCK_THREAD_ID(cpt, sid) (((cpt) << KSOCK_CPT_SHIFT) | (sid))
#define KSOCK_THREAD_CPT(id) ((id) >> KSOCK_CPT_SHIFT)
#define KSOCK_THREAD_SID(id) ((id) & ((1UL << KSOCK_CPT_SHIFT) - 1))
struct ksock_interface { /* in-use interface */
int ksni_index; /* Linux interface index */
struct sockaddr_storage ksni_addr; /* interface's address */
__u32 ksni_netmask; /* interface's network mask */
int ksni_nroutes; /* # routes using (active) */
int ksni_npeers; /* # peers using (passive) */
char ksni_name[IFNAMSIZ]; /* interface name */
};
struct ksock_tunables {
/* "stuck" socket timeout (seconds) */
int *ksnd_timeout;
/* # scheduler threads in each pool while starting */
int *ksnd_nscheds;
int *ksnd_nconnds; /* # connection daemons */
int *ksnd_nconnds_max; /* max # connection daemons */
int *ksnd_min_reconnectms; /* first connection retry after (ms)... */
int *ksnd_max_reconnectms; /* ...exponentially increasing to this */
int *ksnd_eager_ack; /* make TCP ack eagerly? */
int *ksnd_typed_conns; /* drive sockets by type? */
int *ksnd_min_bulk; /* smallest "large" message */
int *ksnd_tx_buffer_size; /* socket tx buffer size */
int *ksnd_rx_buffer_size; /* socket rx buffer size */
int *ksnd_nagle; /* enable NAGLE? */
int *ksnd_round_robin; /* round robin for multiple interfaces */
int *ksnd_keepalive; /* # secs for sending keepalive NOOP */
int *ksnd_keepalive_idle; /* # idle secs before 1st probe */
int *ksnd_keepalive_count; /* # probes */
int *ksnd_keepalive_intvl; /* time between probes */
int *ksnd_credits; /* # concurrent sends */
int *ksnd_peertxcredits; /* # concurrent sends to 1 peer_ni */
int *ksnd_peerrtrcredits; /* # per-peer_ni router buffer credits */
int *ksnd_peertimeout; /* seconds to consider peer_ni dead */
int *ksnd_enable_csum; /* enable check sum */
int *ksnd_inject_csum_error; /* set non-zero to inject checksum error */
int *ksnd_nonblk_zcack; /* always send zc-ack on non-blocking connection */
unsigned int *ksnd_zc_min_payload; /* minimum zero copy payload size */
int *ksnd_zc_recv; /* enable ZC receive (for Chelsio TOE) */
int *ksnd_zc_recv_min_nfrags; /* minimum # of fragments to enable ZC receive */
int *ksnd_irq_affinity; /* enable IRQ affinity? */
#ifdef SOCKNAL_BACKOFF
int *ksnd_backoff_init; /* initial TCP backoff */
int *ksnd_backoff_max; /* maximum TCP backoff */
#endif
#if SOCKNAL_VERSION_DEBUG
int *ksnd_protocol; /* protocol version */
#endif
int *ksnd_conns_per_peer; /* for typed mode, yields:
* 1 + 2*conns_per_peer total
* for untyped:
* conns_per_peer total
*/
};
struct ksock_net {
__u64 ksnn_incarnation; /* my epoch */
struct list_head ksnn_list; /* chain on global list */
atomic_t ksnn_npeers; /* # peers */
struct ksock_interface ksnn_interface; /* IP interface */
struct lnet_ni *ksnn_ni;
};
/* When the ksock_net is shut down, this (negative) bias is added to
* ksnn_npeers, which prevents new peers from being added.
*/
#define SOCKNAL_SHUTDOWN_BIAS (INT_MIN+1)
/* default ksocklnd timeout in seconds */
#define SOCKNAL_TIMEOUT_DEFAULT 50
/** connd timeout */
#define SOCKNAL_CONND_TIMEOUT 120
/** reserved thread for accepting & creating new connd */
#define SOCKNAL_CONND_RESV 1
struct ksock_nal_data {
int ksnd_init; /* initialisation state */
int ksnd_nnets; /* # networks set up */
struct list_head ksnd_nets; /* list of nets */
/* stabilize peer_ni/conn ops */
rwlock_t ksnd_global_lock;
/* hash table of all my known peers */
DECLARE_HASHTABLE(ksnd_peers, SOCKNAL_PEER_HASH_BITS);
atomic_t ksnd_nthreads; /* # live threads */
int ksnd_shuttingdown; /* tell threads to exit */
/* schedulers information */
struct ksock_sched **ksnd_schedulers;
atomic_t ksnd_nactive_txs; /* #active txs */
/* conns to close: reaper_lock*/
struct list_head ksnd_deathrow_conns;
/* conns to free: reaper_lock */
struct list_head ksnd_zombie_conns;
/* conns to retry: reaper_lock*/
struct list_head ksnd_enomem_conns;
/* reaper sleeps here */
wait_queue_head_t ksnd_reaper_waitq;
/* when reaper will wake */
time64_t ksnd_reaper_waketime;
/* serialise */
spinlock_t ksnd_reaper_lock;
int ksnd_enomem_tx; /* test ENOMEM sender */
int ksnd_stall_tx; /* test sluggish sender */
int ksnd_stall_rx; /* test sluggish receiver */
/* incoming connection requests */
struct list_head ksnd_connd_connreqs;
/* routes waiting to be connected */
struct list_head ksnd_connd_routes;
/* connds sleep here */
wait_queue_head_t ksnd_connd_waitq;
/* # connds connecting */
int ksnd_connd_connecting;
/** time stamp of the last failed connecting attempt */
time64_t ksnd_connd_failed_stamp;
/** # starting connd */
unsigned int ksnd_connd_starting;
/** time stamp of the last starting connd */
time64_t ksnd_connd_starting_stamp;
/** # running connd */
unsigned int ksnd_connd_running;
/* serialise */
spinlock_t ksnd_connd_lock;
/* list head for freed noop tx */
struct list_head ksnd_idle_noop_txs;
/* serialise, g_lock unsafe */
spinlock_t ksnd_tx_lock;
};
#define SOCKNAL_INIT_NOTHING 0
#define SOCKNAL_INIT_DATA 1
#define SOCKNAL_INIT_ALL 2
/* A packet just assembled for transmission is represented by 1
* struct iovec fragment - the portals header - followed by 0
* or more struct bio_vec fragments.
*
* On the receive side, initially 1 struct kvec fragment is posted for
* receive (the header). Once the header has been received, the payload is
* received into struct bio_vec fragments.
*/
struct ksock_conn; /* forward ref */
struct ksock_conn_cb; /* forward ref */
struct ksock_proto; /* forward ref */
struct ksock_tx { /* transmit packet */
struct list_head tx_list; /* queue on conn for transmission etc */
struct list_head tx_zc_list; /* queue on peer_ni for ZC request */
refcount_t tx_refcount; /* tx reference count */
int tx_nob; /* # packet bytes */
int tx_resid; /* residual bytes */
int tx_niov; /* # packet kvec frags */
int tx_nkiov; /* # packet page frags */
unsigned short tx_zc_aborted; /* aborted ZC request */
unsigned short tx_zc_capable:1; /* payload is large enough for ZC */
unsigned short tx_zc_checked:1; /* Have I checked if I should ZC? */
unsigned short tx_nonblk:1; /* it's a non-blocking ACK */
struct bio_vec *tx_kiov; /* packet page frags */
struct ksock_conn *tx_conn; /* owning conn */
struct lnet_msg *tx_lnetmsg; /* lnet message for lnet_finalize() */
time64_t tx_deadline; /* when (in secs) tx times out */
struct ksock_msg tx_msg; /* socklnd message buffer */
int tx_desc_size; /* size of this descriptor */
enum lnet_msg_hstatus tx_hstatus; /* health status of tx */
struct kvec tx_hdr; /* virt hdr */
struct bio_vec tx_payload[]; /* paged payload */
};
#define KSOCK_NOOP_TX_SIZE ((int)offsetof(struct ksock_tx, tx_payload[0]))
#define SOCKNAL_RX_KSM_HEADER 1 /* reading ksock message header */
#define SOCKNAL_RX_LNET_HEADER 2 /* reading lnet message header */
#define SOCKNAL_RX_PARSE 3 /* Calling lnet_parse() */
#define SOCKNAL_RX_PARSE_WAIT 4 /* waiting to be told to read the body */
#define SOCKNAL_RX_LNET_PAYLOAD 5 /* reading lnet payload (to deliver here) */
#define SOCKNAL_RX_SLOP 6 /* skipping body */
struct ksock_conn {
struct ksock_peer_ni *ksnc_peer; /* owning peer_ni */
struct ksock_conn_cb *ksnc_conn_cb; /* owning conn control block */
struct list_head ksnc_list; /* on peer_ni's conn list */
struct socket *ksnc_sock; /* actual socket */
void *ksnc_saved_data_ready; /* socket's original
* data_ready() cb */
void *ksnc_saved_write_space; /* socket's original
* write_space() cb */
refcount_t ksnc_conn_refcount; /* conn refcount */
refcount_t ksnc_sock_refcount; /* sock refcount */
struct ksock_sched *ksnc_scheduler; /* who schedules this
* connection */
struct sockaddr_storage ksnc_myaddr; /* my address */
struct sockaddr_storage ksnc_peeraddr; /* peer_ni's address */
signed int ksnc_type:3; /* type of connection,
* should be signed
* value */
unsigned int ksnc_closing:1; /* being shut down */
unsigned int ksnc_flip:1; /* flip or not, only for V2.x */
unsigned int ksnc_zc_capable:1; /* enable to ZC */
const struct ksock_proto *ksnc_proto; /* protocol for the connection */
/* READER */
/* where I enq waiting input or a forwarding descriptor */
struct list_head ksnc_rx_list;
time64_t ksnc_rx_deadline; /* when (in seconds) receive times out */
u8 ksnc_rx_started; /* started receiving a msg */
u8 ksnc_rx_ready; /* data ready to read */
u8 ksnc_rx_scheduled; /* being progressed */
u8 ksnc_rx_state; /* what is being read */
int ksnc_rx_nob_left; /* # bytes to next hdr/body */
struct iov_iter ksnc_rx_to; /* copy destination */
struct kvec ksnc_rx_iov_space[LNET_MAX_IOV]; /* space for frag descriptors */
u32 ksnc_rx_csum; /* partial checksum for
* incoming data
*/
struct lnet_msg *ksnc_lnet_msg; /* rx lnet_finalize arg */
/* incoming message buffer:
* V2.x message takes the whole struct
* V1.x message is a bare struct lnet_hdr_nid4, it's stored in
* ksnc_msg.ksm_u.lnetmsg
*/
struct ksock_msg ksnc_msg;
/* -- WRITER -- */
/* where I enq waiting for output space */
struct list_head ksnc_tx_list;
/* packets waiting to be sent */
struct list_head ksnc_tx_queue;
/* next TX that can carry a LNet message or ZC-ACK */
struct ksock_tx *ksnc_tx_carrier;
/* when (in seconds) tx times out */
time64_t ksnc_tx_deadline;
/* send buffer marker */
int ksnc_tx_bufnob;
/* # bytes queued */
atomic_t ksnc_tx_nob;
/* write space */
int ksnc_tx_ready;
/* being progressed */
int ksnc_tx_scheduled;
/* time stamp of the last posted TX */
time64_t ksnc_tx_last_post;
};
#define SOCKNAL_CONN_COUNT_MAX_BITS 8 /* max conn count bits */
#define SOCKNAL_MAX_RETRIES 3
struct ksock_conn_cb {
struct list_head ksnr_connd_list;/* chain on ksnr_connd_routes */
struct ksock_peer_ni *ksnr_peer; /* owning peer_ni */
refcount_t ksnr_refcount; /* # users */
time64_t ksnr_timeout; /* when (in secs) reconnection
* can happen next
*/
time64_t ksnr_retry_interval;/* secs between retries */
struct sockaddr_storage ksnr_addr; /* IP address to connect to */
unsigned int ksnr_scheduled:1;/* scheduled for attention */
unsigned int ksnr_connecting:1;/* connection in progress */
unsigned int ksnr_connected:4;/* connections by type */
unsigned int ksnr_deleted:1; /* been removed from peer_ni? */
unsigned int ksnr_ctrl_conn_count:2; /* # conns by type */
unsigned int ksnr_blki_conn_count:8;
unsigned int ksnr_blko_conn_count:8;
int ksnr_conn_count;/* total # conns for this cb */
unsigned int ksnr_max_conns; /* conns_per_peer at peer
* creation
*/
unsigned int ksnr_retry_count;/* counts retry attempts
* due to EALREADY rc
*/
};
#define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */
struct ksock_peer_ni {
struct hlist_node ksnp_list; /* stash on global peer_ni list */
time64_t ksnp_last_alive;/* when (in seconds) I was last alive */
struct lnet_processid ksnp_id; /* who's on the other end(s) */
refcount_t ksnp_refcount; /* # users */
int ksnp_closing; /* being closed */
int ksnp_accepting; /* # passive connections pending */
int ksnp_error; /* errno on closing last conn */
__u64 ksnp_zc_next_cookie;/* ZC completion cookie */
__u64 ksnp_incarnation; /* latest known peer_ni incarnation */
const struct ksock_proto *ksnp_proto; /* latest known protocol */
struct list_head ksnp_conns; /* all active connections */
struct ksock_conn_cb *ksnp_conn_cb; /* conn control block */
struct list_head ksnp_tx_queue; /* waiting packets */
spinlock_t ksnp_lock; /* serialize, g_lock unsafe */
/* zero copy requests wait for ACK */
struct list_head ksnp_zc_req_list;
time64_t ksnp_send_keepalive; /* time to send keepalive */
struct lnet_ni *ksnp_ni; /* which network */
};
struct ksock_connreq {
/* stash on ksnd_connd_connreqs */
struct list_head ksncr_list;
/* chosen NI */
struct lnet_ni *ksncr_ni;
/* accepted socket */
struct socket *ksncr_sock;
};
extern struct ksock_nal_data ksocknal_data;
extern struct ksock_tunables ksocknal_tunables;
extern struct lnet_ioctl_config_socklnd_tunables ksock_default_tunables;
#define SOCKNAL_MATCH_NO 0 /* TX can't match type of connection */
#define SOCKNAL_MATCH_YES 1 /* TX matches type of connection */
#define SOCKNAL_MATCH_MAY 2 /* TX can be sent on the connection, but not preferred */
struct ksock_proto {
int pro_version; /* version number of protocol */
/* handshake function */
int (*pro_send_hello)(struct ksock_conn *conn,
struct ksock_hello_msg *hello);
/* handshake function */
int (*pro_recv_hello)(struct ksock_conn *conn,
struct ksock_hello_msg *hello, int timeout);
void (*pro_pack)(struct ksock_tx *tx);
/* message unpack */
void (*pro_unpack)(struct ksock_msg *tx_msg, struct lnet_hdr *hdr);
/* queue tx on the connection */
struct ksock_tx *(*pro_queue_tx_msg)(struct ksock_conn *conn,
struct ksock_tx *tx);
/* queue ZC ack on the connection */
int (*pro_queue_tx_zcack)(struct ksock_conn *conn, struct ksock_tx *tx,
__u64 cookie);
/* handle ZC request */
int (*pro_handle_zcreq)(struct ksock_conn *conn, __u64 cookie,
int noblock);
/* handle ZC ACK */
int (*pro_handle_zcack)(struct ksock_conn *conn, __u64 cookie,
__u64 noblock);
/* msg type matches the connection type:
* return value:
* return MATCH_NO : no
* return MATCH_YES : matching type
* return MATCH_MAY : can be backup
*/
int (*pro_match_tx)(struct ksock_conn *conn, struct ksock_tx *tx,
int noblock);
};
extern const struct ksock_proto ksocknal_protocol_v1x;
extern const struct ksock_proto ksocknal_protocol_v2x;
extern const struct ksock_proto ksocknal_protocol_v3x;
extern const struct ksock_proto ksocknal_protocol_v4x;
#define KSOCK_PROTO_V1_MAJOR LNET_PROTO_TCP_VERSION_MAJOR
#define KSOCK_PROTO_V1_MINOR LNET_PROTO_TCP_VERSION_MINOR
#define KSOCK_PROTO_V1 KSOCK_PROTO_V1_MAJOR
static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len)
{
return crc32_le(crc, p, len);
}
static inline int
ksocknal_conn_cb_mask(void)
{
if (!*ksocknal_tunables.ksnd_typed_conns)
return BIT(SOCKLND_CONN_ANY);
return (BIT(SOCKLND_CONN_CONTROL) |
BIT(SOCKLND_CONN_BULK_IN) |
BIT(SOCKLND_CONN_BULK_OUT));
}
static inline void
ksocknal_conn_addref(struct ksock_conn *conn)
{
refcount_inc(&conn->ksnc_conn_refcount);
}
extern void ksocknal_queue_zombie_conn(struct ksock_conn *conn);
extern void ksocknal_finalize_zcreq(struct ksock_conn *conn);
static inline void
ksocknal_conn_decref(struct ksock_conn *conn)
{
if (refcount_dec_and_test(&conn->ksnc_conn_refcount))
ksocknal_queue_zombie_conn(conn);
}
static inline int
ksocknal_connsock_addref(struct ksock_conn *conn)
{
int rc = -ESHUTDOWN;
read_lock(&ksocknal_data.ksnd_global_lock);
if (!conn->ksnc_closing) {
refcount_inc(&conn->ksnc_sock_refcount);
rc = 0;
}
read_unlock(&ksocknal_data.ksnd_global_lock);
return rc;
}
static inline void
ksocknal_connsock_decref(struct ksock_conn *conn)
{
if (refcount_dec_and_test(&conn->ksnc_sock_refcount)) {
LASSERT(conn->ksnc_closing);
sock_release(conn->ksnc_sock);
conn->ksnc_sock = NULL;
ksocknal_finalize_zcreq(conn);
}
}
static inline void
ksocknal_tx_addref(struct ksock_tx *tx)
{
refcount_inc(&tx->tx_refcount);
}
extern void ksocknal_tx_prep(struct ksock_conn *, struct ksock_tx *tx);
extern void ksocknal_tx_done(struct lnet_ni *ni, struct ksock_tx *tx,
int error);
static inline void
ksocknal_tx_decref(struct ksock_tx *tx)
{
if (refcount_dec_and_test(&tx->tx_refcount))
ksocknal_tx_done(NULL, tx, 0);
}
static inline void
ksocknal_conn_cb_addref(struct ksock_conn_cb *conn_cb)
{
refcount_inc(&conn_cb->ksnr_refcount);
}
extern void ksocknal_destroy_conn_cb(struct ksock_conn_cb *conn_cb);
static inline void
ksocknal_conn_cb_decref(struct ksock_conn_cb *conn_cb)
{
if (refcount_dec_and_test(&conn_cb->ksnr_refcount))
ksocknal_destroy_conn_cb(conn_cb);
}
static inline void
ksocknal_peer_addref(struct ksock_peer_ni *peer_ni)
{
refcount_inc(&peer_ni->ksnp_refcount);
}
extern void ksocknal_destroy_peer(struct ksock_peer_ni *peer_ni);
static inline void
ksocknal_peer_decref(struct ksock_peer_ni *peer_ni)
{
if (refcount_dec_and_test(&peer_ni->ksnp_refcount))
ksocknal_destroy_peer(peer_ni);
}
static inline int ksocknal_timeout(void)
{
return *ksocknal_tunables.ksnd_timeout ?: lnet_get_lnd_timeout();
}
static inline int ksocknal_conns_per_peer(void)
{
return *ksocknal_tunables.ksnd_conns_per_peer ?: 1;
}
int ksocklnd_lookup_conns_per_peer(struct lnet_ni *ni);
int ksocknal_startup(struct lnet_ni *ni);
void ksocknal_shutdown(struct lnet_ni *ni);
int ksocknal_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg);
int ksocknal_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg);
int ksocknal_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
int delayed, struct iov_iter *to, unsigned int rlen);
int ksocknal_accept(struct lnet_ni *ni, struct socket *sock);
unsigned int ksocknal_get_conn_count_by_type(struct ksock_conn_cb *conn_cb,
int type);
int ksocknal_add_peer(struct lnet_ni *ni, struct lnet_processid *id,
struct sockaddr *addr);
struct ksock_peer_ni *ksocknal_find_peer_locked(struct lnet_ni *ni,
struct lnet_processid *id);
extern void ksocknal_peer_failed(struct ksock_peer_ni *peer_ni);
extern int ksocknal_create_conn(struct lnet_ni *ni,
struct ksock_conn_cb *conn_cb,
struct socket *sock, int type);
extern void ksocknal_close_conn_locked(struct ksock_conn *conn, int why);
extern void ksocknal_terminate_conn(struct ksock_conn *conn);
extern void ksocknal_destroy_conn(struct ksock_conn *conn);
extern int ksocknal_close_peer_conns_locked(struct ksock_peer_ni *peer_ni,
struct sockaddr *peer, int why);
extern int ksocknal_close_conn_and_siblings(struct ksock_conn *conn, int why);
int ksocknal_close_matching_conns(struct lnet_processid *id, __u32 ipaddr);
extern struct ksock_conn *ksocknal_find_conn_locked(struct ksock_peer_ni *peer_ni,
struct ksock_tx *tx, int nonblk);
extern int ksocknal_launch_packet(struct lnet_ni *ni, struct ksock_tx *tx,
struct lnet_processid *id);
extern struct ksock_tx *ksocknal_alloc_tx(int type, int size);
extern void ksocknal_free_tx(struct ksock_tx *tx);
extern struct ksock_tx *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk);
extern void ksocknal_next_tx_carrier(struct ksock_conn *conn);
extern void ksocknal_queue_tx_locked(struct ksock_tx *tx, struct ksock_conn *conn);
extern void ksocknal_txlist_done(struct lnet_ni *ni, struct list_head *txlist,
int error);
#define ksocknal_thread_start(fn, data, namefmt, arg...) \
({ \
struct task_struct *__task = kthread_run(fn, data, \
namefmt, ##arg); \
if (!IS_ERR(__task)) \
atomic_inc(&ksocknal_data.ksnd_nthreads); \
PTR_ERR_OR_ZERO(__task); \
})
extern void ksocknal_thread_fini(void);
extern void ksocknal_launch_all_connections_locked(struct ksock_peer_ni *peer_ni);
extern struct ksock_conn_cb *ksocknal_find_connectable_conn_cb_locked(struct ksock_peer_ni *peer_ni);
extern struct ksock_conn_cb *ksocknal_find_connecting_conn_cb_locked(struct ksock_peer_ni *peer_ni);
extern int ksocknal_new_packet(struct ksock_conn *conn, int skip);
extern int ksocknal_scheduler(void *arg);
extern int ksocknal_connd(void *arg);
extern int ksocknal_reaper(void *arg);
int ksocknal_send_hello(struct lnet_ni *ni, struct ksock_conn *conn,
struct lnet_nid *peer_nid,
struct ksock_hello_msg *hello);
int ksocknal_recv_hello(struct lnet_ni *ni, struct ksock_conn *conn,
struct ksock_hello_msg *hello,
struct lnet_processid *id,
__u64 *incarnation);
extern void ksocknal_read_callback(struct ksock_conn *conn);
extern void ksocknal_write_callback(struct ksock_conn *conn);
extern int ksocknal_lib_zc_capable(struct ksock_conn *conn);
extern void ksocknal_lib_save_callback(struct socket *sock, struct ksock_conn *conn);
extern void ksocknal_lib_set_callback(struct socket *sock, struct ksock_conn *conn);
extern void ksocknal_lib_reset_callback(struct socket *sock,
struct ksock_conn *conn);
extern void ksocknal_lib_push_conn(struct ksock_conn *conn);
extern int ksocknal_lib_get_conn_addrs(struct ksock_conn *conn);
extern int ksocknal_lib_setup_sock(struct socket *sock, struct lnet_ni *ni);
int ksocknal_lib_send_hdr(struct ksock_conn *conn, struct ksock_tx *tx);
int ksocknal_lib_send_kiov(struct ksock_conn *conn, struct ksock_tx *tx);
void ksocknal_lib_eager_ack(struct ksock_conn *conn);
int ksocknal_lib_recv(struct ksock_conn *conn);
extern int ksocknal_lib_get_conn_tunables(struct ksock_conn *conn, int *txmem,
int *rxmem, int *nagle);
extern int ksocknal_tunables_init(void);
void ksocknal_tunables_setup(struct lnet_lnd_tunables *lnd_tunables,
struct lnet_ioctl_config_lnd_cmn_tunables *net_tunables);
extern void ksocknal_lib_csum_tx(struct ksock_tx *tx);
extern int ksocknal_lib_memory_pressure(struct ksock_conn *conn);
#endif /* _SOCKLND_SOCKLND_H_ */
