+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2004 Cluster File Systems, Inc.
- * Author: Eric Barton <eric@bartonsoftware.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre 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.
- *
- * Lustre 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 Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/stat.h>
-#include <linux/errno.h>
-#include <linux/smp_lock.h>
-#include <linux/unistd.h>
-#include <linux/uio.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/stat.h>
-#include <linux/list.h>
-#include <linux/kmod.h>
-#include <linux/sysctl.h>
-
-#include <net/sock.h>
-
-#define DEBUG_SUBSYSTEM S_NAL
-
-#include <linux/kp30.h>
-#include <portals/p30.h>
-#include <portals/lib-p30.h>
-#include <portals/nal.h>
-
-#include <rapl.h>
-
-#if CONFIG_SMP
-# define RANAL_N_SCHED num_online_cpus() /* # schedulers */
-#else
-# define RANAL_N_SCHED 1 /* # schedulers */
-#endif
-
-#define RANAL_MAXDEVS 2 /* max # devices RapidArray supports */
-
-#define RANAL_N_CONND 4 /* # connection daemons */
-
-#define RANAL_MIN_RECONNECT_INTERVAL 1 /* first failed connection retry (seconds)... */
-#define RANAL_MAX_RECONNECT_INTERVAL 60 /* ...exponentially increasing to this */
-
-#define RANAL_FMA_PREFIX_LEN 232 /* size of FMA "Prefix" */
-#define RANAL_FMA_MAX_DATA_LEN ((7<<10)-256) /* Max FMA MSG is 7K including prefix */
-
-#define RANAL_PEER_HASH_SIZE 101 /* # peer lists */
-#define RANAL_CONN_HASH_SIZE 101 /* # conn lists */
-
-#define RANAL_NTX 64 /* # tx descs */
-#define RANAL_NTX_NBLK 256 /* # reserved tx descs */
-
-#define RANAL_FMA_CQ_SIZE 8192 /* # entries in receive CQ
- * (overflow is a performance hit) */
-
-#define RANAL_RESCHED 100 /* # scheduler loops before reschedule */
-
-#define RANAL_MIN_TIMEOUT 5 /* minimum timeout interval (seconds) */
-#define RANAL_TIMEOUT2KEEPALIVE(t) (((t)+1)/2) /* timeout -> keepalive interval */
-
-/* default vals for runtime tunables */
-#define RANAL_TIMEOUT 30 /* comms timeout (seconds) */
-#define RANAL_LISTENER_TIMEOUT 5 /* listener timeout (seconds) */
-#define RANAL_MAX_IMMEDIATE (2<<10) /* biggest immediate payload */
-
-typedef struct
-{
- int kra_timeout; /* comms timeout (seconds) */
- int kra_listener_timeout; /* max time the listener can block */
- int kra_backlog; /* listener's backlog */
- int kra_port; /* listener's TCP/IP port */
- int kra_max_immediate; /* biggest immediate payload */
- struct ctl_table_header *kra_sysctl; /* sysctl interface */
-} kra_tunables_t;
-
-typedef struct
-{
- RAP_PVOID rad_handle; /* device handle */
- RAP_PROTECTION_HANDLE rad_ptag; /* protection tag */
- RAP_CQ_HANDLE rad_fma_cq; /* FMA (small message) completion queue */
- RAP_CQ_HANDLE rad_rdma_cq; /* rdma completion queue */
- int rad_id; /* device id */
- int rad_idx; /* index in kra_devices */
- int rad_ready; /* set by device callback */
- struct list_head rad_connq; /* connections requiring attention */
- wait_queue_head_t rad_waitq; /* scheduler waits here */
- spinlock_t rad_lock; /* serialise */
-} kra_device_t;
-
-typedef struct
-{
- int kra_init; /* initialisation state */
- int kra_shutdown; /* shut down? */
- atomic_t kra_nthreads; /* # live threads */
-
- struct semaphore kra_nid_mutex; /* serialise NID/listener ops */
- struct semaphore kra_listener_signal; /* block for listener startup/shutdown */
- struct socket *kra_listener_sock; /* listener's socket */
- int kra_listener_shutdown; /* ask listener to close */
-
- kra_device_t kra_devices[RANAL_MAXDEVS]; /* device/ptag/cq etc */
- int kra_ndevs; /* # devices */
-
- rwlock_t kra_global_lock; /* stabilize peer/conn ops */
-
- struct list_head *kra_peers; /* hash table of all my known peers */
- int kra_peer_hash_size; /* size of kra_peers */
- atomic_t kra_npeers; /* # peers extant */
-
- struct list_head *kra_conns; /* conns hashed by cqid */
- int kra_conn_hash_size; /* size of kra_conns */
- __u64 kra_next_incarnation; /* conn incarnation # generator */
- int kra_next_cqid; /* cqid generator */
- atomic_t kra_nconns; /* # connections extant */
-
- long kra_new_min_timeout; /* minimum timeout on any new conn */
- wait_queue_head_t kra_reaper_waitq; /* reaper sleeps here */
- spinlock_t kra_reaper_lock; /* serialise */
-
- struct list_head kra_connd_peers; /* peers waiting for a connection */
- wait_queue_head_t kra_connd_waitq; /* connection daemons sleep here */
- spinlock_t kra_connd_lock; /* serialise */
-
- struct list_head kra_idle_txs; /* idle tx descriptors */
- struct list_head kra_idle_nblk_txs; /* idle reserved tx descriptors */
- __u64 kra_next_tx_cookie; /* RDMA completion cookie */
- wait_queue_head_t kra_idle_tx_waitq; /* block here for tx descriptor */
- spinlock_t kra_tx_lock; /* serialise */
-} kra_data_t;
-
-#define RANAL_INIT_NOTHING 0
-#define RANAL_INIT_DATA 1
-#define RANAL_INIT_LIB 2
-#define RANAL_INIT_ALL 3
-
-/************************************************************************
- * Wire message structs. These are sent in sender's byte order
- * (i.e. receiver checks magic and flips if required).
- */
-
-typedef struct kra_connreq /* connection request/response */
-{ /* (sent via socket) */
- __u32 racr_magic; /* I'm an ranal connreq */
- __u16 racr_version; /* this is my version number */
- __u16 racr_devid; /* which device to connect on */
- __u64 racr_nid; /* my NID */
- __u64 racr_incarnation; /* my incarnation */
- __u32 racr_timeout; /* my timeout */
- RAP_RI_PARAMETERS racr_riparams; /* my endpoint info */
-} kra_connreq_t;
-
-typedef struct
-{
- RAP_MEM_KEY rard_key;
- RAP_PVOID64 rard_addr;
- RAP_UINT32 rard_nob;
-} kra_rdma_desc_t;
-
-typedef struct
-{
- ptl_hdr_t raim_hdr; /* portals header */
- /* Portals payload is in FMA "Message Data" */
-} kra_immediate_msg_t;
-
-typedef struct
-{
- ptl_hdr_t raprm_hdr; /* portals header */
- __u64 raprm_cookie; /* opaque completion cookie */
-} kra_putreq_msg_t;
-
-typedef struct
-{
- __u64 rapam_src_cookie; /* reflected completion cookie */
- __u64 rapam_dst_cookie; /* opaque completion cookie */
- kra_rdma_desc_t rapam_desc; /* sender's sink buffer */
-} kra_putack_msg_t;
-
-typedef struct
-{
- ptl_hdr_t ragm_hdr; /* portals header */
- __u64 ragm_cookie; /* opaque completion cookie */
- kra_rdma_desc_t ragm_desc; /* sender's sink buffer */
-} kra_get_msg_t;
-
-typedef struct
-{
- __u64 racm_cookie; /* reflected completion cookie */
-} kra_completion_msg_t;
-
-typedef struct /* NB must fit in FMA "Prefix" */
-{
- __u32 ram_magic; /* I'm an ranal message */
- __u16 ram_version; /* this is my version number */
- __u16 ram_type; /* msg type */
- __u64 ram_srcnid; /* sender's NID */
- __u64 ram_incarnation; /* sender's connection incarnation */
- union {
- kra_immediate_msg_t immediate;
- kra_putreq_msg_t putreq;
- kra_putack_msg_t putack;
- kra_get_msg_t get;
- kra_completion_msg_t completion;
- } ram_u;
- __u32 ram_seq; /* incrementing sequence number */
-} kra_msg_t;
-
-#define RANAL_MSG_MAGIC 0x0be91b92 /* unique magic */
-#define RANAL_MSG_VERSION 1 /* current protocol version */
-
-#define RANAL_MSG_FENCE 0x80 /* fence RDMA */
-
-#define RANAL_MSG_NONE 0x00 /* illegal message */
-#define RANAL_MSG_NOOP 0x01 /* empty ram_u (keepalive) */
-#define RANAL_MSG_IMMEDIATE 0x02 /* ram_u.immediate */
-#define RANAL_MSG_PUT_REQ 0x03 /* ram_u.putreq (src->sink) */
-#define RANAL_MSG_PUT_NAK 0x04 /* ram_u.completion (no PUT match: sink->src) */
-#define RANAL_MSG_PUT_ACK 0x05 /* ram_u.putack (PUT matched: sink->src) */
-#define RANAL_MSG_PUT_DONE 0x86 /* ram_u.completion (src->sink) */
-#define RANAL_MSG_GET_REQ 0x07 /* ram_u.get (sink->src) */
-#define RANAL_MSG_GET_NAK 0x08 /* ram_u.completion (no GET match: src->sink) */
-#define RANAL_MSG_GET_DONE 0x89 /* ram_u.completion (src->sink) */
-#define RANAL_MSG_CLOSE 0x8a /* empty ram_u */
-
-/***********************************************************************/
-
-typedef struct kra_tx /* message descriptor */
-{
- struct list_head tx_list; /* queue on idle_txs/rac_sendq/rac_waitq */
- struct kra_conn *tx_conn; /* owning conn */
- lib_msg_t *tx_libmsg[2]; /* lib msgs to finalize on completion */
- unsigned long tx_qtime; /* when tx started to wait for something */
- int tx_isnblk; /* I'm reserved for non-blocking sends */
- int tx_nob; /* # bytes of payload */
- int tx_buftype; /* payload buffer type */
- void *tx_buffer; /* source/sink buffer */
- int tx_phys_offset; /* first page offset (if phys) */
- int tx_phys_npages; /* # physical pages */
- RAP_PHYS_REGION *tx_phys; /* page descriptors */
- RAP_MEM_KEY tx_map_key; /* mapping key */
- RAP_RDMA_DESCRIPTOR tx_rdma_desc; /* rdma descriptor */
- __u64 tx_cookie; /* identify this tx to peer */
- kra_msg_t tx_msg; /* FMA message buffer */
-} kra_tx_t;
-
-#define RANAL_BUF_NONE 0 /* buffer type not set */
-#define RANAL_BUF_IMMEDIATE 1 /* immediate data */
-#define RANAL_BUF_PHYS_UNMAPPED 2 /* physical: not mapped yet */
-#define RANAL_BUF_PHYS_MAPPED 3 /* physical: mapped already */
-#define RANAL_BUF_VIRT_UNMAPPED 4 /* virtual: not mapped yet */
-#define RANAL_BUF_VIRT_MAPPED 5 /* virtual: mapped already */
-
-#define RANAL_TX_IDLE 0x00 /* on freelist */
-#define RANAL_TX_SIMPLE 0x10 /* about to send a simple message */
-#define RANAL_TX_PUTI_REQ 0x20 /* PUT initiator about to send PUT_REQ */
-#define RANAL_TX_PUTI_WAIT_ACK 0x21 /* PUT initiator waiting for PUT_ACK */
-#define RANAL_TX_PUTI_RDMA 0x22 /* PUT initiator waiting for RDMA to complete */
-#define RANAL_TX_PUTI_DONE 0x23 /* PUT initiator about to send PUT_DONE */
-#define RANAL_TX_PUTT_NAK 0x30 /* PUT target about to send PUT_NAK */
-#define RANAL_TX_PUTT_ACK 0x30 /* PUT target about to send PUT_ACK */
-#define RANAL_TX_PUTT_WAIT_DONE 0x31 /* PUT target waiting for PUT_DONE */
-#define RANAL_TX_GETI_REQ 0x40 /* GET initiator about to send GET_REQ */
-#define RANAL_TX_GETI_WAIT_DONE 0x41 /* GET initiator waiting for GET_DONE */
-#define RANAL_TX_GETT_NAK 0x50 /* GET target about to send PUT_NAK */
-#define RANAL_TX_GETT_RDMA 0x51 /* GET target waiting for RDMA to complete */
-#define RANAL_TX_GETT_DONE 0x52 /* GET target about to send GET_DONE */
-
-typedef struct kra_conn
-{
- struct kra_peer *rac_peer; /* owning peer */
- struct list_head rac_list; /* stash on peer's conn list */
- struct list_head rac_hashlist; /* stash in connection hash table */
- struct list_head rac_schedlist; /* queue for scheduler */
- struct list_head rac_fmaq; /* txs queued for FMA */
- struct list_head rac_rdmaq; /* txs awaiting RDMA completion */
- struct list_head rac_replyq; /* txs awaiting replies */
- __u64 rac_peer_incarnation; /* peer's unique connection stamp */
- __u64 rac_my_incarnation; /* my unique connection stamp */
- unsigned long rac_last_tx; /* when I last sent an FMA message */
- unsigned long rac_last_rx; /* when I last received an FMA messages */
- long rac_keepalive; /* keepalive interval */
- long rac_timeout; /* infer peer death on (last_rx + timout > now) */
- __u32 rac_cqid; /* my completion callback id (non-unique) */
- __u32 rac_tx_seq; /* tx msg sequence number */
- __u32 rac_rx_seq; /* rx msg sequence number */
- atomic_t rac_refcount; /* # users */
- unsigned int rac_close_sent; /* I've sent CLOSE */
- unsigned int rac_close_recvd; /* I've received CLOSE */
- unsigned int rac_closing; /* connection being torn down */
- unsigned int rac_scheduled; /* being attented to */
- spinlock_t rac_lock; /* serialise */
- kra_device_t *rac_device; /* which device */
- RAP_PVOID rac_rihandle; /* RA endpoint */
- kra_msg_t *rac_rxmsg; /* incoming message (FMA prefix) */
- kra_msg_t rac_msg; /* keepalive/CLOSE message buffer */
-} kra_conn_t;
-
-typedef struct kra_peer
-{
- struct list_head rap_list; /* stash on global peer list */
- struct list_head rap_connd_list; /* schedule on kra_connd_peers */
- struct list_head rap_conns; /* all active connections */
- struct list_head rap_tx_queue; /* msgs waiting for a conn */
- ptl_nid_t rap_nid; /* who's on the other end(s) */
- __u32 rap_ip; /* IP address of peer */
- int rap_port; /* port on which peer listens */
- atomic_t rap_refcount; /* # users */
- int rap_persistence; /* "known" peer refs */
- int rap_connecting; /* connection forming */
- unsigned long rap_reconnect_time; /* CURRENT_TIME when reconnect OK */
- unsigned long rap_reconnect_interval; /* exponential backoff */
-} kra_peer_t;
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
-# define sk_allocation allocation
-# 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
-# define sk_wmem_queued wmem_queued
-# define sk_err err
-# define sk_sleep sleep
-#endif
-
-extern lib_nal_t kranal_lib;
-extern kra_data_t kranal_data;
-extern kra_tunables_t kranal_tunables;
-
-extern void __kranal_peer_decref(kra_peer_t *peer);
-extern void __kranal_conn_decref(kra_conn_t *conn);
-
-static inline void
-kranal_peer_addref(kra_peer_t *peer)
-{
- CDEBUG(D_NET, "%p->"LPX64"\n", peer, peer->rap_nid);
- LASSERT(atomic_read(&peer->rap_refcount) > 0);
- atomic_inc(&peer->rap_refcount);
-}
-
-static inline void
-kranal_peer_decref(kra_peer_t *peer)
-{
- CDEBUG(D_NET, "%p->"LPX64"\n", peer, peer->rap_nid);
- LASSERT(atomic_read(&peer->rap_refcount) > 0);
- if (atomic_dec_and_test(&peer->rap_refcount))
- __kranal_peer_decref(peer);
-}
-
-static inline struct list_head *
-kranal_nid2peerlist (ptl_nid_t nid)
-{
- unsigned int hash = ((unsigned int)nid) % kranal_data.kra_peer_hash_size;
-
- return (&kranal_data.kra_peers [hash]);
-}
-
-static inline int
-kranal_peer_active(kra_peer_t *peer)
-{
- /* Am I in the peer hash table? */
- return (!list_empty(&peer->rap_list));
-}
-
-static inline void
-kranal_conn_addref(kra_conn_t *conn)
-{
- CDEBUG(D_NET, "%p->"LPX64"\n", conn, conn->rac_peer->rap_nid);
- LASSERT(atomic_read(&conn->rac_refcount) > 0);
- atomic_inc(&conn->rac_refcount);
-}
-
-static inline void
-kranal_conn_decref(kra_conn_t *conn)
-{
- CDEBUG(D_NET, "%p->"LPX64"\n", conn, conn->rac_peer->rap_nid);
- LASSERT(atomic_read(&conn->rac_refcount) > 0);
- if (atomic_dec_and_test(&conn->rac_refcount))
- __kranal_conn_decref(conn);
-}
-
-static inline struct list_head *
-kranal_cqid2connlist (__u32 cqid)
-{
- unsigned int hash = cqid % kranal_data.kra_conn_hash_size;
-
- return (&kranal_data.kra_conns [hash]);
-}
-
-static inline kra_conn_t *
-kranal_cqid2conn_locked (__u32 cqid)
-{
- struct list_head *conns = kranal_cqid2connlist(cqid);
- struct list_head *tmp;
- kra_conn_t *conn;
-
- list_for_each(tmp, conns) {
- conn = list_entry(tmp, kra_conn_t, rac_hashlist);
-
- if (conn->rac_cqid == cqid)
- return conn;
- }
-
- return NULL;
-}
-
-static inline int
-kranal_tx_mapped (kra_tx_t *tx)
-{
- return (tx->tx_buftype == RANAL_BUF_VIRT_MAPPED ||
- tx->tx_buftype == RANAL_BUF_PHYS_MAPPED);
-}
-
-#if CONFIG_X86
-static inline __u64
-kranal_page2phys (struct page *p)
-{
- __u64 page_number = p - mem_map;
-
- return (page_number << PAGE_SHIFT);
-}
-#else
-# error "no page->phys"
-#endif
-
-extern int kranal_listener_procint(ctl_table *table,
- int write, struct file *filp,
- void *buffer, size_t *lenp);
-extern int kranal_close_stale_conns_locked (kra_peer_t *peer,
- __u64 incarnation);
-extern void kranal_update_reaper_timeout(long timeout);
-extern void kranal_tx_done (kra_tx_t *tx, int completion);
-extern void kranal_unlink_peer_locked (kra_peer_t *peer);
-extern void kranal_schedule_conn(kra_conn_t *conn);
-extern kra_peer_t *kranal_create_peer (ptl_nid_t nid);
-extern kra_peer_t *kranal_find_peer_locked (ptl_nid_t nid);
-extern void kranal_post_fma (kra_conn_t *conn, kra_tx_t *tx);
-extern int kranal_del_peer (ptl_nid_t nid, int single_share);
-extern void kranal_device_callback(RAP_INT32 devid);
-extern int kranal_thread_start (int(*fn)(void *arg), void *arg);
-extern int kranal_connd (void *arg);
-extern int kranal_reaper (void *arg);
-extern int kranal_scheduler (void *arg);
-extern void kranal_close_conn_locked (kra_conn_t *conn, int error);
-extern void kranal_terminate_conn_locked (kra_conn_t *conn);
-extern void kranal_connect (kra_peer_t *peer);
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