X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lnet%2Fklnds%2Fsocklnd%2Fsocklnd.h;h=f02003aeced6f8f3f3a172a256fbdbee63ce99cd;hp=ff73f71ce51cacad07e14ac0e76001f340d4e4a9;hb=9766f8e746731c74096c86fcc9514c3e3219e674;hpb=23de47e82bd999ec651f927097922413527cca71 diff --git a/lnet/klnds/socklnd/socklnd.h b/lnet/klnds/socklnd/socklnd.h index ff73f71..f02003a 100644 --- a/lnet/klnds/socklnd/socklnd.h +++ b/lnet/klnds/socklnd/socklnd.h @@ -1,13 +1,14 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. + * + * Copyright (c) 2011, 2013, Intel Corporation. * - * Copyright (C) 2001, 2002 Cluster File Systems, Inc. * Author: Zach Brown * Author: Peter J. Braam * Author: Phil Schwan * Author: Eric Barton * - * This file is part of Portals, http://www.sf.net/projects/lustre/ + * This file is part of Lustre, http://www.lustre.org * * Portals is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public @@ -24,403 +25,663 @@ * */ +#ifndef _SOCKLND_SOCKLND_H_ +#define _SOCKLND_SOCKLND_H_ + #define DEBUG_PORTAL_ALLOC -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif +#define DEBUG_SUBSYSTEM S_LND -#include -#include +#ifdef HAVE_COMPAT_RDMA +#include +#endif +#include +#include +#include +#include #include +#include +#include +#include #include -#include +#include #include -#include -#include +#include +#include +#include +#include #include #include #include -#include - -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define DEBUG_SUBSYSTEM S_SOCKNAL - -#include -#include -#include -#include -#include -#include -#include - -#if CONFIG_SMP -# define SOCKNAL_N_SCHED num_online_cpus() /* # socknal schedulers */ -#else -# define SOCKNAL_N_SCHED 1 /* # socknal schedulers */ -#endif -#define SOCKNAL_N_AUTOCONNECTD 4 /* # socknal autoconnect daemons */ - -#define SOCKNAL_MIN_RECONNECT_INTERVAL HZ /* first failed connection retry... */ -#define SOCKNAL_MAX_RECONNECT_INTERVAL (60*HZ) /* ...exponentially increasing to this */ - -/* default vals for runtime tunables */ -#define SOCKNAL_IO_TIMEOUT 20 /* default comms timeout (seconds) */ -#define SOCKNAL_EAGER_ACK 0 /* default eager ack (boolean) */ -#define SOCKNAL_TYPED_CONNS 1 /* unidirectional large, bidirectional small? */ -#define SOCKNAL_ZC_MIN_FRAG (2<<10) /* default smallest zerocopy fragment */ -#define SOCKNAL_MIN_BULK (1<<10) /* smallest "large" message */ -#define SOCKNAL_USE_KEEPALIVES 0 /* use tcp/ip keepalive? */ - -#define SOCKNAL_PEER_HASH_SIZE 101 /* # peer lists */ -#define SOCKNAL_SMALL_FWD_NMSGS 128 /* # small messages I can be forwarding at any time */ -#define SOCKNAL_LARGE_FWD_NMSGS 64 /* # large messages I can be forwarding at any time */ +#include +#include +#include +#include -#define SOCKNAL_SMALL_FWD_PAGES 1 /* # pages in a small message fwd buffer */ +#ifdef HAVE_TCP_SENDPAGE_USE_SOCKET +# define cfs_tcp_sendpage(sk, page, offset, size, flags) \ + tcp_sendpage((sk)->sk_socket, page, offset, size, flags) +#else /* !HAVE_TCP_SENDPAGE_USE_SOCKET */ +# define cfs_tcp_sendpage(sk, page, offset, size, flags) \ + tcp_sendpage(sk, page, offset, size, flags) +#endif /* HAVE_TCP_SENDPAGE_USE_SOCKET */ -#define SOCKNAL_LARGE_FWD_PAGES (PAGE_ALIGN(PTL_MTU) >> PAGE_SHIFT) - /* # pages in a large message fwd buffer */ +/* assume one thread for each connection type */ +#define SOCKNAL_NSCHEDS 3 +#define SOCKNAL_NSCHEDS_HIGH (SOCKNAL_NSCHEDS << 1) +#define SOCKNAL_PEER_HASH_SIZE 101 /* # peer lists */ #define SOCKNAL_RESCHED 100 /* # scheduler loops before reschedule */ -#define SOCKNAL_ENOMEM_RETRY 1 /* jiffies between retries */ +#define SOCKNAL_INSANITY_RECONN 5000 /* connd is trying on reconn infinitely */ +#define SOCKNAL_ENOMEM_RETRY CFS_TICK /* jiffies between retries */ -#define SOCKNAL_TX_LOW_WATER(sk) (((sk)->sk_sndbuf*8)/10) +#define SOCKNAL_SINGLE_FRAG_TX 0 /* disable multi-fragment sends */ +#define SOCKNAL_SINGLE_FRAG_RX 0 /* disable multi-fragment receives */ -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,72)) -# define sk_data_ready data_ready -# define sk_write_space write_space -# define sk_user_data user_data -# define sk_prot prot -# define sk_sndbuf sndbuf -# define sk_socket socket -#endif +#define SOCKNAL_VERSION_DEBUG 0 /* enable protocol version debugging */ -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) -# define sk_wmem_queued wmem_queued +/* 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 -typedef struct /* pool of forwarding buffers */ -{ - spinlock_t fmp_lock; /* serialise */ - struct list_head fmp_idle_fmbs; /* free buffers */ - struct list_head fmp_blocked_conns; /* connections waiting for a buffer */ - int fmp_nactive_fmbs; /* # buffers in use */ - int fmp_buff_pages; /* # pages per buffer */ -} ksock_fmb_pool_t; - +struct ksock_sched_info; typedef struct /* per scheduler state */ { - spinlock_t kss_lock; /* serialise */ - struct list_head kss_rx_conns; /* conn waiting to be read */ - struct list_head kss_tx_conns; /* conn waiting to be written */ -#if SOCKNAL_ZC - struct list_head kss_zctxdone_list; /* completed ZC transmits */ + spinlock_t kss_lock; /* serialise */ + struct list_head kss_rx_conns; /* conn waiting to be read */ + /* conn waiting to be written */ + struct list_head kss_tx_conns; + /* zombie noop tx list */ + struct list_head kss_zombie_noop_txs; + wait_queue_head_t kss_waitq; /* where scheduler sleeps */ + /* # connections assigned to this scheduler */ + int kss_nconns; + struct ksock_sched_info *kss_info; /* owner of it */ +#if !SOCKNAL_SINGLE_FRAG_RX + struct page *kss_rx_scratch_pgs[LNET_MAX_IOV]; #endif - wait_queue_head_t kss_waitq; /* where scheduler sleeps */ - int kss_nconns; /* # connections assigned to this scheduler */ -} ksock_sched_t; - -typedef struct { - int ksni_valid:1; /* been set yet? */ - int ksni_bound:1; /* bound to a cpu yet? */ - int ksni_sched:6; /* which scheduler (assumes < 64) */ -} ksock_irqinfo_t; - -typedef struct { - int ksnd_io_timeout; /* "stuck" socket timeout (seconds) */ - int ksnd_eager_ack; /* make TCP ack eagerly? */ - int ksnd_typed_conns; /* drive sockets by type? */ - int ksnd_min_bulk; /* smallest "large" message */ -#if SOCKNAL_ZC - unsigned int ksnd_zc_min_frag; /* minimum zero copy frag size */ +#if !SOCKNAL_SINGLE_FRAG_TX || !SOCKNAL_SINGLE_FRAG_RX + struct kvec kss_scratch_iov[LNET_MAX_IOV]; #endif - struct ctl_table_header *ksnd_sysctl; /* sysctl interface */ -} ksock_tunables_t; - -typedef struct { - int ksnd_init; /* initialisation state */ - __u64 ksnd_incarnation; /* my epoch */ - - rwlock_t ksnd_global_lock; /* stabilize peer/conn ops */ - struct list_head *ksnd_peers; /* hash table of all my known peers */ - int ksnd_peer_hash_size; /* size of ksnd_peers */ - - atomic_t ksnd_nthreads; /* # live threads */ - int ksnd_shuttingdown; /* tell threads to exit */ - ksock_sched_t *ksnd_schedulers; /* scheduler state */ - - atomic_t ksnd_npeers; /* total # peers extant */ - atomic_t ksnd_nclosing_conns; /* # closed conns extant */ - - kpr_router_t ksnd_router; /* THE router */ - - ksock_fmb_pool_t ksnd_small_fmp; /* small message forwarding buffers */ - ksock_fmb_pool_t ksnd_large_fmp; /* large message forwarding buffers */ +} ksock_sched_t; - atomic_t ksnd_nactive_ltxs; /* #active ltxs */ +struct ksock_sched_info { + int ksi_nthreads_max; /* max allowed threads */ + int ksi_nthreads; /* number of threads */ + int ksi_cpt; /* CPT id */ + ksock_sched_t *ksi_scheds; /* array of schedulers */ +}; - struct list_head ksnd_deathrow_conns; /* conns to be closed */ - struct list_head ksnd_zombie_conns; /* conns to be freed */ - struct list_head ksnd_enomem_conns; /* conns to be retried */ - wait_queue_head_t ksnd_reaper_waitq; /* reaper sleeps here */ - unsigned long ksnd_reaper_waketime; /* when reaper will wake */ - spinlock_t ksnd_reaper_lock; /* serialise */ +#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)) - int ksnd_enomem_tx; /* test ENOMEM sender */ - int ksnd_stall_tx; /* test sluggish sender */ - int ksnd_stall_rx; /* test sluggish receiver */ +typedef struct /* in-use interface */ +{ + __u32 ksni_ipaddr; /* interface's IP 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 */ +} ksock_interface_t; + +typedef struct +{ + /* "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 */ + int *ksnd_peerrtrcredits; /* # per-peer router buffer credits */ + int *ksnd_peertimeout; /* seconds to consider peer 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 */ +#ifdef CPU_AFFINITY + int *ksnd_irq_affinity; /* enable IRQ affinity? */ +#endif +#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 +} ksock_tunables_t; - struct list_head ksnd_autoconnectd_routes; /* routes waiting to be connected */ - wait_queue_head_t ksnd_autoconnectd_waitq; /* autoconnectds sleep here */ - spinlock_t ksnd_autoconnectd_lock; /* serialise */ +typedef struct +{ + __u64 ksnn_incarnation; /* my epoch */ + spinlock_t ksnn_lock; /* serialise */ + struct list_head ksnn_list; /* chain on global list */ + int ksnn_npeers; /* # peers */ + int ksnn_shutdown; /* shutting down? */ + int ksnn_ninterfaces; /* IP interfaces */ + ksock_interface_t ksnn_interfaces[LNET_MAX_INTERFACES]; +} ksock_net_t; + +/** connd timeout */ +#define SOCKNAL_CONND_TIMEOUT 120 +/** reserved thread for accepting & creating new connd */ +#define SOCKNAL_CONND_RESV 1 + +typedef struct +{ + int ksnd_init; /* initialisation state */ + int ksnd_nnets; /* # networks set up */ + struct list_head ksnd_nets; /* list of nets */ + /* stabilize peer/conn ops */ + rwlock_t ksnd_global_lock; + /* hash table of all my known peers */ + struct list_head *ksnd_peers; + int ksnd_peer_hash_size; /* size of ksnd_peers */ + + int ksnd_nthreads; /* # live threads */ + int ksnd_shuttingdown; /* tell threads to exit */ + /* schedulers information */ + struct ksock_sched_info **ksnd_sched_info; + + 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 */ + cfs_time_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 */ + long ksnd_connd_failed_stamp; + /** # starting connd */ + unsigned ksnd_connd_starting; + /** time stamp of the last starting connd */ + long ksnd_connd_starting_stamp; + /** # running connd */ + unsigned 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; - ksock_irqinfo_t ksnd_irqinfo[NR_IRQS];/* irq->scheduler lookup */ } ksock_nal_data_t; #define SOCKNAL_INIT_NOTHING 0 #define SOCKNAL_INIT_DATA 1 -#define SOCKNAL_INIT_LIB 2 -#define SOCKNAL_INIT_ALL 3 +#define SOCKNAL_INIT_ALL 2 /* A packet just assembled for transmission is represented by 1 or more - * struct iovec fragments (the first frag contains the portals header), - * followed by 0 or more ptl_kiov_t fragments. + * struct kvec fragments (the first frag contains the portals header), + * followed by 0 or more lnet_kiov_t fragments. * - * On the receive side, initially 1 struct iovec fragment is posted for + * 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 either struct iovec or ptl_kiov_t fragments, depending on + * received into either struct kvec or lnet_kiov_t fragments, depending on * what the header matched or whether the message needs forwarding. */ struct ksock_conn; /* forward ref */ struct ksock_peer; /* forward ref */ struct ksock_route; /* forward ref */ +struct ksock_proto; /* forward ref */ typedef struct /* transmit packet */ { - struct list_head tx_list; /* queue on conn for transmission etc */ - char tx_isfwd; /* forwarding / sourced here */ - int tx_nob; /* # packet bytes */ - int tx_resid; /* residual bytes */ - int tx_niov; /* # packet iovec frags */ - struct iovec *tx_iov; /* packet iovec frags */ - int tx_nkiov; /* # packet page frags */ - ptl_kiov_t *tx_kiov; /* packet page frags */ - struct ksock_conn *tx_conn; /* owning conn */ - ptl_hdr_t *tx_hdr; /* packet header (for debug only) */ -#if SOCKNAL_ZC - zccd_t tx_zccd; /* zero copy callback descriptor */ -#endif + struct list_head tx_list; /* queue on conn for transmission etc */ + struct list_head tx_zc_list; /* queue on peer for ZC request */ + atomic_t tx_refcount; /* tx reference count */ + int tx_nob; /* # packet bytes */ + int tx_resid; /* residual bytes */ + int tx_niov; /* # packet kvec frags */ + struct kvec *tx_iov; /* 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 */ + lnet_kiov_t *tx_kiov; /* packet page frags */ + struct ksock_conn *tx_conn; /* owning conn */ + lnet_msg_t *tx_lnetmsg; /* lnet message for lnet_finalize() */ + cfs_time_t tx_deadline; /* when (in jiffies) tx times out */ + ksock_msg_t tx_msg; /* socklnd message buffer */ + int tx_desc_size; /* size of this descriptor */ + union { + struct { + struct kvec iov; /* virt hdr */ + lnet_kiov_t kiov[0]; /* paged payload */ + } paged; + struct { + struct kvec iov[1]; /* virt hdr + payload */ + } virt; + } tx_frags; } ksock_tx_t; -typedef struct /* forwarded packet */ -{ - ksock_tx_t ftx_tx; /* send info */ - struct iovec ftx_iov; /* hdr iovec */ -} ksock_ftx_t; +#define KSOCK_NOOP_TX_SIZE ((int)offsetof(ksock_tx_t, tx_frags.paged.kiov[0])) -#define KSOCK_ZCCD_2_TX(ptr) list_entry (ptr, ksock_tx_t, tx_zccd) /* network zero copy callback descriptor embedded in ksock_tx_t */ -typedef struct /* locally transmitted packet */ -{ - ksock_tx_t ltx_tx; /* send info */ - void *ltx_private; /* lib_finalize() callback arg */ - void *ltx_cookie; /* lib_finalize() callback arg */ - ptl_hdr_t ltx_hdr; /* buffer for packet header */ - int ltx_desc_size; /* bytes allocated for this desc */ - struct iovec ltx_iov[1]; /* iov for hdr + payload */ - ptl_kiov_t ltx_kiov[0]; /* kiov for payload */ -} ksock_ltx_t; - -#define KSOCK_TX_2_KPR_FWD_DESC(ptr) list_entry ((kprfd_scratch_t *)ptr, kpr_fwd_desc_t, kprfd_scratch) -/* forwarded packets (router->socknal) embedded in kpr_fwd_desc_t::kprfd_scratch */ - -#define KSOCK_TX_2_KSOCK_LTX(ptr) list_entry (ptr, ksock_ltx_t, ltx_tx) -/* local packets (lib->socknal) embedded in ksock_ltx_t::ltx_tx */ - -/* NB list_entry() is used here as convenient macro for calculating a - * pointer to a struct from the address of a member. */ - -typedef struct /* Kernel portals Socket Forwarding message buffer */ -{ /* (socknal->router) */ - struct list_head fmb_list; /* queue idle */ - kpr_fwd_desc_t fmb_fwd; /* router's descriptor */ - ksock_fmb_pool_t *fmb_pool; /* owning pool */ - struct ksock_peer *fmb_peer; /* peer received from */ - ptl_hdr_t fmb_hdr; /* message header */ - ptl_kiov_t fmb_kiov[0]; /* payload frags */ -} ksock_fmb_t; - /* space for the rx frag descriptors; we either read a single contiguous - * header, or up to PTL_MD_MAX_IOV frags of payload of either type. */ + * header, or up to LNET_MAX_IOV frags of payload of either type. */ typedef union { - struct iovec iov[PTL_MD_MAX_IOV]; - ptl_kiov_t kiov[PTL_MD_MAX_IOV]; + struct kvec iov[LNET_MAX_IOV]; + lnet_kiov_t kiov[LNET_MAX_IOV]; } ksock_rxiovspace_t; -#define SOCKNAL_RX_HEADER 1 /* reading header */ -#define SOCKNAL_RX_BODY 2 /* reading body (to deliver here) */ -#define SOCKNAL_RX_BODY_FWD 3 /* reading body (to forward) */ -#define SOCKNAL_RX_SLOP 4 /* skipping body */ -#define SOCKNAL_RX_GET_FMB 5 /* scheduled for forwarding */ -#define SOCKNAL_RX_FMB_SLEEP 6 /* blocked waiting for a fwd desc */ +#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 */ typedef struct ksock_conn -{ - struct ksock_peer *ksnc_peer; /* owning peer */ - struct ksock_route *ksnc_route; /* owning route */ - struct list_head ksnc_list; /* stash on peer's conn list */ - struct socket *ksnc_sock; /* actual socket */ - void *ksnc_saved_data_ready; /* socket's original data_ready() callback */ - void *ksnc_saved_write_space; /* socket's original write_space() callback */ - atomic_t ksnc_refcount; /* # users */ - ksock_sched_t *ksnc_scheduler; /* who schedules this connection */ - __u32 ksnc_ipaddr; /* peer's IP */ - int ksnc_port; /* peer's port */ - int ksnc_closing; /* being shut down */ - int ksnc_type; /* type of connection */ - __u64 ksnc_incarnation; /* peer's incarnation */ - - /* reader */ - struct list_head ksnc_rx_list; /* where I enq waiting input or a forwarding descriptor */ - unsigned long ksnc_rx_deadline; /* when (in jiffies) receive times out */ - int ksnc_rx_started; /* started receiving a message */ - int ksnc_rx_ready; /* data ready to read */ - int ksnc_rx_scheduled; /* being progressed */ - int ksnc_rx_state; /* what is being read */ - int ksnc_rx_nob_left; /* # bytes to next hdr/body */ - int ksnc_rx_nob_wanted; /* bytes actually wanted */ - int ksnc_rx_niov; /* # iovec frags */ - struct iovec *ksnc_rx_iov; /* the iovec frags */ - int ksnc_rx_nkiov; /* # page frags */ - ptl_kiov_t *ksnc_rx_kiov; /* the page frags */ - ksock_rxiovspace_t ksnc_rx_iov_space; /* space for frag descriptors */ - void *ksnc_cookie; /* rx lib_finalize passthru arg */ - ptl_hdr_t ksnc_hdr; /* where I read headers into */ - - /* WRITER */ - struct list_head ksnc_tx_list; /* where I enq waiting for output space */ - struct list_head ksnc_tx_queue; /* packets waiting to be sent */ - unsigned long ksnc_tx_deadline; /* when (in jiffies) tx times out */ - atomic_t ksnc_tx_nob; /* # bytes queued */ - int ksnc_tx_ready; /* write space */ - int ksnc_tx_scheduled; /* being progressed */ +{ + struct ksock_peer *ksnc_peer; /* owning peer */ + struct ksock_route *ksnc_route; /* owning route */ + struct list_head ksnc_list; /* stash on peer's conn list */ + struct socket *ksnc_sock; /* actual socket */ + void *ksnc_saved_data_ready; /* socket's original data_ready() callback */ + void *ksnc_saved_write_space; /* socket's original write_space() callback */ + atomic_t ksnc_conn_refcount; /* conn refcount */ + atomic_t ksnc_sock_refcount; /* sock refcount */ + ksock_sched_t *ksnc_scheduler; /* who schedules this connection */ + __u32 ksnc_myipaddr; /* my IP */ + __u32 ksnc_ipaddr; /* peer's IP */ + int ksnc_port; /* peer's port */ + 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 */ + 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; + cfs_time_t ksnc_rx_deadline; /* when (in jiffies) receive times out */ + __u8 ksnc_rx_started; /* started receiving a message */ + __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 */ + int ksnc_rx_nob_wanted; /* bytes actually wanted */ + int ksnc_rx_niov; /* # kvec frags */ + struct kvec *ksnc_rx_iov; /* the kvec frags */ + int ksnc_rx_nkiov; /* # page frags */ + lnet_kiov_t *ksnc_rx_kiov; /* the page frags */ + ksock_rxiovspace_t ksnc_rx_iov_space;/* space for frag descriptors */ + __u32 ksnc_rx_csum; /* partial checksum for incoming data */ + void *ksnc_cookie; /* rx lnet_finalize passthru arg */ + ksock_msg_t ksnc_msg; /* incoming message buffer: + * V2.x message takes the + * whole struct + * V1.x message is a bare + * lnet_hdr_t, it's stored in + * ksnc_msg.ksm_u.lnetmsg */ + + /* -- 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 */ + ksock_tx_t *ksnc_tx_carrier; + /* when (in jiffies) tx times out */ + cfs_time_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 */ + cfs_time_t ksnc_tx_last_post; } ksock_conn_t; -#define KSNR_TYPED_ROUTES ((1 << SOCKNAL_CONN_CONTROL) | \ - (1 << SOCKNAL_CONN_BULK_IN) | \ - (1 << SOCKNAL_CONN_BULK_OUT)) - typedef struct ksock_route { - struct list_head ksnr_list; /* chain on peer route list */ - struct list_head ksnr_connect_list; /* chain on autoconnect list */ - struct ksock_peer *ksnr_peer; /* owning peer */ - atomic_t ksnr_refcount; /* # users */ - int ksnr_sharecount; /* lconf usage counter */ - unsigned long ksnr_timeout; /* when (in jiffies) reconnection can happen next */ - unsigned int ksnr_retry_interval; /* how long between retries */ - __u32 ksnr_ipaddr; /* an IP address for this peer */ - int ksnr_port; /* port to connect to */ - int ksnr_buffer_size; /* size of socket buffers */ - unsigned int ksnr_irq_affinity:1; /* set affinity? */ - unsigned int ksnr_eager:1; /* connect eagery? */ - unsigned int ksnr_connecting:4; /* autoconnects in progress by type */ - unsigned int ksnr_connected:4; /* connections established by type */ - unsigned int ksnr_deleted:1; /* been removed from peer? */ - int ksnr_conn_count; /* # conns established by this route */ + struct list_head ksnr_list; /* chain on peer route list */ + struct list_head ksnr_connd_list; /* chain on ksnr_connd_routes */ + struct ksock_peer *ksnr_peer; /* owning peer */ + atomic_t ksnr_refcount; /* # users */ + cfs_time_t ksnr_timeout; /* when (in jiffies) reconnection can happen next */ + cfs_duration_t ksnr_retry_interval; /* how long between retries */ + __u32 ksnr_myipaddr; /* my IP */ + __u32 ksnr_ipaddr; /* IP address to connect to */ + int ksnr_port; /* port to connect to */ + unsigned int ksnr_scheduled:1; /* scheduled for attention */ + unsigned int ksnr_connecting:1;/* connection establishment in progress */ + unsigned int ksnr_connected:4; /* connections established by type */ + unsigned int ksnr_deleted:1; /* been removed from peer? */ + unsigned int ksnr_share_count; /* created explicitly? */ + int ksnr_conn_count; /* # conns established by this route */ } ksock_route_t; +#define SOCKNAL_KEEPALIVE_PING 1 /* cookie for keepalive ping */ + typedef struct ksock_peer { - struct list_head ksnp_list; /* stash on global peer list */ - ptl_nid_t ksnp_nid; /* who's on the other end(s) */ - atomic_t ksnp_refcount; /* # users */ - int ksnp_closing; /* being closed */ - int ksnp_error; /* errno on closing last conn */ - struct list_head ksnp_conns; /* all active connections */ - struct list_head ksnp_routes; /* routes */ - struct list_head ksnp_tx_queue; /* waiting packets */ - unsigned long ksnp_last_alive; /* when (in jiffies) I was last alive */ + struct list_head ksnp_list; /* stash on global peer list */ + cfs_time_t ksnp_last_alive; /* when (in jiffies) I was last alive */ + lnet_process_id_t ksnp_id; /* who's on the other end(s) */ + atomic_t ksnp_refcount; /* # users */ + int ksnp_sharecount; /* lconf usage counter */ + 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 incarnation */ + struct ksock_proto *ksnp_proto; /* latest known peer protocol */ + struct list_head ksnp_conns; /* all active connections */ + struct list_head ksnp_routes; /* routes */ + 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; + cfs_time_t ksnp_send_keepalive; /* time to send keepalive */ + lnet_ni_t *ksnp_ni; /* which network */ + int ksnp_n_passive_ips; /* # of... */ + __u32 ksnp_passive_ips[LNET_MAX_INTERFACES]; /* preferred local interfaces */ } ksock_peer_t; +typedef struct ksock_connreq +{ + /* stash on ksnd_connd_connreqs */ + struct list_head ksncr_list; + /* chosen NI */ + lnet_ni_t *ksncr_ni; + /* accepted socket */ + struct socket *ksncr_sock; +} ksock_connreq_t; -extern lib_nal_t ksocknal_lib; extern ksock_nal_data_t ksocknal_data; extern ksock_tunables_t ksocknal_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 */ + +typedef struct ksock_proto +{ + int pro_version; /* version number of protocol */ + int (*pro_send_hello)(ksock_conn_t *, ksock_hello_msg_t *); /* handshake function */ + int (*pro_recv_hello)(ksock_conn_t *, ksock_hello_msg_t *, int);/* handshake function */ + void (*pro_pack)(ksock_tx_t *); /* message pack */ + void (*pro_unpack)(ksock_msg_t *); /* message unpack */ + ksock_tx_t *(*pro_queue_tx_msg)(ksock_conn_t *, ksock_tx_t *); /* queue tx on the connection */ + int (*pro_queue_tx_zcack)(ksock_conn_t *, ksock_tx_t *, __u64); /* queue ZC ack on the connection */ + int (*pro_handle_zcreq)(ksock_conn_t *, __u64, int); /* handle ZC request */ + int (*pro_handle_zcack)(ksock_conn_t *, __u64, __u64); /* handle ZC ACK */ + int (*pro_match_tx)(ksock_conn_t *, ksock_tx_t *, int); /* msg type matches the connection type: + * return value: + * return MATCH_NO : no + * return MATCH_YES : matching type + * return MATCH_MAY : can be backup */ +} ksock_proto_t; + +extern ksock_proto_t ksocknal_protocol_v1x; +extern ksock_proto_t ksocknal_protocol_v2x; +extern ksock_proto_t ksocknal_protocol_v3x; + +#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 + +#ifndef CPU_MASK_NONE +#define CPU_MASK_NONE 0UL +#endif + +static inline __u32 ksocknal_csum(__u32 crc, unsigned char const *p, size_t len) +{ +#if 1 + return crc32_le(crc, p, len); +#else + while (len-- > 0) + crc = ((crc + 0x100) & ~0xff) | ((crc + *p++) & 0xff) ; + + return crc; +#endif +} + +static inline int +ksocknal_route_mask(void) +{ + if (!*ksocknal_tunables.ksnd_typed_conns) + return (1 << SOCKLND_CONN_ANY); + + return ((1 << SOCKLND_CONN_CONTROL) | + (1 << SOCKLND_CONN_BULK_IN) | + (1 << SOCKLND_CONN_BULK_OUT)); +} + static inline struct list_head * -ksocknal_nid2peerlist (ptl_nid_t nid) +ksocknal_nid2peerlist (lnet_nid_t nid) { unsigned int hash = ((unsigned int)nid) % ksocknal_data.ksnd_peer_hash_size; - + return (&ksocknal_data.ksnd_peers [hash]); } +static inline void +ksocknal_conn_addref (ksock_conn_t *conn) +{ + LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0); + atomic_inc(&conn->ksnc_conn_refcount); +} + +extern void ksocknal_queue_zombie_conn (ksock_conn_t *conn); +extern void ksocknal_finalize_zcreq(ksock_conn_t *conn); + +static inline void +ksocknal_conn_decref (ksock_conn_t *conn) +{ + LASSERT (atomic_read(&conn->ksnc_conn_refcount) > 0); + if (atomic_dec_and_test(&conn->ksnc_conn_refcount)) + ksocknal_queue_zombie_conn(conn); +} + static inline int -ksocknal_getconnsock (ksock_conn_t *conn) +ksocknal_connsock_addref (ksock_conn_t *conn) +{ + int rc = -ESHUTDOWN; + + read_lock(&ksocknal_data.ksnd_global_lock); + if (!conn->ksnc_closing) { + LASSERT(atomic_read(&conn->ksnc_sock_refcount) > 0); + atomic_inc(&conn->ksnc_sock_refcount); + rc = 0; + } + read_unlock(&ksocknal_data.ksnd_global_lock); + + return (rc); +} + +static inline void +ksocknal_connsock_decref (ksock_conn_t *conn) +{ + LASSERT (atomic_read(&conn->ksnc_sock_refcount) > 0); + if (atomic_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 (ksock_tx_t *tx) +{ + LASSERT (atomic_read(&tx->tx_refcount) > 0); + atomic_inc(&tx->tx_refcount); +} + +extern void ksocknal_tx_prep (ksock_conn_t *, ksock_tx_t *tx); +extern void ksocknal_tx_done (lnet_ni_t *ni, ksock_tx_t *tx); + +static inline void +ksocknal_tx_decref (ksock_tx_t *tx) +{ + LASSERT (atomic_read(&tx->tx_refcount) > 0); + if (atomic_dec_and_test(&tx->tx_refcount)) + ksocknal_tx_done(NULL, tx); +} + +static inline void +ksocknal_route_addref (ksock_route_t *route) +{ + LASSERT (atomic_read(&route->ksnr_refcount) > 0); + atomic_inc(&route->ksnr_refcount); +} + +extern void ksocknal_destroy_route (ksock_route_t *route); + +static inline void +ksocknal_route_decref (ksock_route_t *route) { - int rc = -ESHUTDOWN; - - read_lock (&ksocknal_data.ksnd_global_lock); - if (!conn->ksnc_closing) { - rc = 0; - get_file (conn->ksnc_sock->file); - } - read_unlock (&ksocknal_data.ksnd_global_lock); - - return (rc); + LASSERT (atomic_read (&route->ksnr_refcount) > 0); + if (atomic_dec_and_test(&route->ksnr_refcount)) + ksocknal_destroy_route (route); } static inline void -ksocknal_putconnsock (ksock_conn_t *conn) +ksocknal_peer_addref (ksock_peer_t *peer) { - fput (conn->ksnc_sock->file); + LASSERT (atomic_read (&peer->ksnp_refcount) > 0); + atomic_inc(&peer->ksnp_refcount); } -extern void ksocknal_put_route (ksock_route_t *route); -extern void ksocknal_put_peer (ksock_peer_t *peer); -extern ksock_peer_t *ksocknal_find_peer_locked (ptl_nid_t nid); -extern ksock_peer_t *ksocknal_get_peer (ptl_nid_t nid); -extern int ksocknal_del_route (ptl_nid_t nid, __u32 ipaddr, - int single, int keep_conn); -extern int ksocknal_create_conn (ksock_route_t *route, - struct socket *sock, int bind_irq, int type); +extern void ksocknal_destroy_peer (ksock_peer_t *peer); + +static inline void +ksocknal_peer_decref (ksock_peer_t *peer) +{ + LASSERT (atomic_read (&peer->ksnp_refcount) > 0); + if (atomic_dec_and_test(&peer->ksnp_refcount)) + ksocknal_destroy_peer (peer); +} + +int ksocknal_startup (lnet_ni_t *ni); +void ksocknal_shutdown (lnet_ni_t *ni); +int ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg); +int ksocknal_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg); +int ksocknal_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, + int delayed, unsigned int niov, + struct kvec *iov, lnet_kiov_t *kiov, + unsigned int offset, unsigned int mlen, unsigned int rlen); +int ksocknal_accept(lnet_ni_t *ni, struct socket *sock); + +extern int ksocknal_add_peer(lnet_ni_t *ni, lnet_process_id_t id, __u32 ip, int port); +extern ksock_peer_t *ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id); +extern ksock_peer_t *ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id); +extern void ksocknal_peer_failed (ksock_peer_t *peer); +extern int ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route, + struct socket *sock, int type); extern void ksocknal_close_conn_locked (ksock_conn_t *conn, int why); extern void ksocknal_terminate_conn (ksock_conn_t *conn); extern void ksocknal_destroy_conn (ksock_conn_t *conn); -extern void ksocknal_put_conn (ksock_conn_t *conn); -extern int ksocknal_close_stale_conns_locked (ksock_peer_t *peer, __u64 incarnation); +extern int ksocknal_close_peer_conns_locked (ksock_peer_t *peer, + __u32 ipaddr, int why); extern int ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why); -extern int ksocknal_close_matching_conns (ptl_nid_t nid, __u32 ipaddr); - +extern int ksocknal_close_matching_conns(lnet_process_id_t id, __u32 ipaddr); +extern ksock_conn_t *ksocknal_find_conn_locked(ksock_peer_t *peer, + ksock_tx_t *tx, int nonblk); + +extern int ksocknal_launch_packet(lnet_ni_t *ni, ksock_tx_t *tx, + lnet_process_id_t id); +extern ksock_tx_t *ksocknal_alloc_tx(int type, int size); +extern void ksocknal_free_tx (ksock_tx_t *tx); +extern ksock_tx_t *ksocknal_alloc_tx_noop(__u64 cookie, int nonblk); +extern void ksocknal_next_tx_carrier(ksock_conn_t *conn); extern void ksocknal_queue_tx_locked (ksock_tx_t *tx, ksock_conn_t *conn); -extern void ksocknal_tx_done (ksock_tx_t *tx, int asynch); -extern void ksocknal_fwd_packet (void *arg, kpr_fwd_desc_t *fwd); -extern void ksocknal_fmb_callback (void *arg, int error); -extern void ksocknal_notify (void *arg, ptl_nid_t gw_nid, int alive); -extern int ksocknal_thread_start (int (*fn)(void *arg), void *arg); +extern void ksocknal_txlist_done(lnet_ni_t *ni, struct list_head *txlist, + int error); +extern void ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive); +extern void ksocknal_query (struct lnet_ni *ni, lnet_nid_t nid, cfs_time_t *when); +extern int ksocknal_thread_start(int (*fn)(void *arg), void *arg, char *name); +extern void ksocknal_thread_fini (void); +extern void ksocknal_launch_all_connections_locked (ksock_peer_t *peer); +extern ksock_route_t *ksocknal_find_connectable_route_locked (ksock_peer_t *peer); +extern ksock_route_t *ksocknal_find_connecting_route_locked (ksock_peer_t *peer); extern int ksocknal_new_packet (ksock_conn_t *conn, int skip); extern int ksocknal_scheduler (void *arg); -extern void ksocknal_data_ready(struct sock *sk, int n); -extern void ksocknal_write_space(struct sock *sk); -extern int ksocknal_autoconnectd (void *arg); +extern int ksocknal_connd (void *arg); extern int ksocknal_reaper (void *arg); -extern int ksocknal_setup_sock (struct socket *sock); -extern int ksocknal_hello (struct socket *sock, - ptl_nid_t *nid, int *type, __u64 *incarnation); +extern int ksocknal_send_hello (lnet_ni_t *ni, ksock_conn_t *conn, + lnet_nid_t peer_nid, ksock_hello_msg_t *hello); +extern int ksocknal_recv_hello (lnet_ni_t *ni, ksock_conn_t *conn, + ksock_hello_msg_t *hello, lnet_process_id_t *id, + __u64 *incarnation); +extern void ksocknal_read_callback(ksock_conn_t *conn); +extern void ksocknal_write_callback(ksock_conn_t *conn); + +extern int ksocknal_lib_zc_capable(ksock_conn_t *conn); +extern void ksocknal_lib_save_callback(struct socket *sock, ksock_conn_t *conn); +extern void ksocknal_lib_set_callback(struct socket *sock, ksock_conn_t *conn); +extern void ksocknal_lib_reset_callback(struct socket *sock, + ksock_conn_t *conn); +extern void ksocknal_lib_push_conn(ksock_conn_t *conn); +extern int ksocknal_lib_get_conn_addrs(ksock_conn_t *conn); +extern int ksocknal_lib_setup_sock(struct socket *so); +extern int ksocknal_lib_send_iov(ksock_conn_t *conn, ksock_tx_t *tx); +extern int ksocknal_lib_send_kiov(ksock_conn_t *conn, ksock_tx_t *tx); +extern void ksocknal_lib_eager_ack(ksock_conn_t *conn); +extern int ksocknal_lib_recv_iov(ksock_conn_t *conn); +extern int ksocknal_lib_recv_kiov(ksock_conn_t *conn); +extern int ksocknal_lib_get_conn_tunables(ksock_conn_t *conn, int *txmem, + int *rxmem, int *nagle); + +extern int ksocknal_tunables_init(void); + +extern void ksocknal_lib_csum_tx(ksock_tx_t *tx); + +extern int ksocknal_lib_memory_pressure(ksock_conn_t *conn); +extern int ksocknal_lib_bind_thread_to_cpu(int id); + +#endif /* _SOCKLND_SOCKLND_H_ */