/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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/ * * Portals is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Portals is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Portals; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #define DEBUG_PORTAL_ALLOC #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #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 #define DEBUG_SUBSYSTEM S_SOCKNAL #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 50 /* 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 */ #define SOCKNAL_SMALL_FWD_PAGES 1 /* # pages in a small message fwd buffer */ #define SOCKNAL_LARGE_FWD_PAGES (PAGE_ALIGN(PTL_MTU) >> PAGE_SHIFT) /* # pages in a large message fwd buffer */ #define SOCKNAL_RESCHED 100 /* # scheduler loops before reschedule */ #define SOCKNAL_ENOMEM_RETRY 1 /* jiffies between retries */ #define SOCKNAL_TX_LOW_WATER(sk) (((sk)->sk_sndbuf*8)/10) #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 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) # define sk_wmem_queued wmem_queued #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; 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 */ #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_init; /* initialisation state */ 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 */ #endif struct ctl_table_header *ksnd_sysctl; /* sysctl interface */ __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 */ nal_cb_t *ksnd_nal_cb; spinlock_t ksnd_nal_cb_lock; /* lib cli/sti lock */ 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 */ atomic_t ksnd_nactive_ltxs; /* #active ltxs */ 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 */ int ksnd_enomem_tx; /* test ENOMEM sender */ int ksnd_stall_tx; /* test sluggish sender */ int ksnd_stall_rx; /* test sluggish receiver */ 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 */ 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_PTL 2 #define SOCKNAL_INIT_ALL 3 /* 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. * * On the receive side, initially 1 struct iovec 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 * 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 */ 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 } 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_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. */ typedef union { struct iovec iov[PTL_MD_MAX_IOV]; ptl_kiov_t kiov[PTL_MD_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 */ 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 */ } 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 */ } ksock_route_t; 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 */ } ksock_peer_t; extern nal_cb_t ksocknal_lib; extern ksock_nal_data_t ksocknal_data; static inline struct list_head * ksocknal_nid2peerlist (ptl_nid_t nid) { unsigned int hash = ((unsigned int)nid) % ksocknal_data.ksnd_peer_hash_size; return (&ksocknal_data.ksnd_peers [hash]); } static inline int ksocknal_getconnsock (ksock_conn_t *conn) { 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); } static inline void ksocknal_putconnsock (ksock_conn_t *conn) { fput (conn->ksnc_sock->file); } 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_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_conn_and_siblings (ksock_conn_t *conn, int why); extern int ksocknal_close_matching_conns (ptl_nid_t nid, __u32 ipaddr); 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 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_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);