+++ /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.
- *
- */
-#include "ranal.h"
-
-
-nal_t kranal_api;
-ptl_handle_ni_t kranal_ni;
-kra_data_t kranal_data;
-kra_tunables_t kranal_tunables;
-
-#ifdef CONFIG_SYSCTL
-#define RANAL_SYSCTL_TIMEOUT 1
-#define RANAL_SYSCTL_LISTENER_TIMEOUT 2
-#define RANAL_SYSCTL_BACKLOG 3
-#define RANAL_SYSCTL_PORT 4
-#define RANAL_SYSCTL_MAX_IMMEDIATE 5
-
-#define RANAL_SYSCTL 202
-
-static ctl_table kranal_ctl_table[] = {
- {RANAL_SYSCTL_TIMEOUT, "timeout",
- &kranal_tunables.kra_timeout, sizeof(int),
- 0644, NULL, &proc_dointvec},
- {RANAL_SYSCTL_LISTENER_TIMEOUT, "listener_timeout",
- &kranal_tunables.kra_listener_timeout, sizeof(int),
- 0644, NULL, &proc_dointvec},
- {RANAL_SYSCTL_BACKLOG, "backlog",
- &kranal_tunables.kra_backlog, sizeof(int),
- 0644, NULL, kranal_listener_procint},
- {RANAL_SYSCTL_PORT, "port",
- &kranal_tunables.kra_port, sizeof(int),
- 0644, NULL, kranal_listener_procint},
- {RANAL_SYSCTL_MAX_IMMEDIATE, "max_immediate",
- &kranal_tunables.kra_max_immediate, sizeof(int),
- 0644, NULL, &proc_dointvec},
- { 0 }
-};
-
-static ctl_table kranal_top_ctl_table[] = {
- {RANAL_SYSCTL, "ranal", NULL, 0, 0555, kranal_ctl_table},
- { 0 }
-};
-#endif
-
-int
-kranal_sock_write (struct socket *sock, void *buffer, int nob)
-{
- int rc;
- mm_segment_t oldmm = get_fs();
- struct iovec iov = {
- .iov_base = buffer,
- .iov_len = nob
- };
- struct msghdr msg = {
- .msg_name = NULL,
- .msg_namelen = 0,
- .msg_iov = &iov,
- .msg_iovlen = 1,
- .msg_control = NULL,
- .msg_controllen = 0,
- .msg_flags = MSG_DONTWAIT
- };
-
- /* We've set up the socket's send buffer to be large enough for
- * everything we send, so a single non-blocking send should
- * complete without error. */
-
- set_fs(KERNEL_DS);
- rc = sock_sendmsg(sock, &msg, iov.iov_len);
- set_fs(oldmm);
-
- return rc;
-}
-
-int
-kranal_sock_read (struct socket *sock, void *buffer, int nob, int timeout)
-{
- int rc;
- mm_segment_t oldmm = get_fs();
- long ticks = timeout * HZ;
- unsigned long then;
- struct timeval tv;
-
- LASSERT (nob > 0);
- LASSERT (ticks > 0);
-
- for (;;) {
- struct iovec iov = {
- .iov_base = buffer,
- .iov_len = nob
- };
- struct msghdr msg = {
- .msg_name = NULL,
- .msg_namelen = 0,
- .msg_iov = &iov,
- .msg_iovlen = 1,
- .msg_control = NULL,
- .msg_controllen = 0,
- .msg_flags = 0
- };
-
- /* Set receive timeout to remaining time */
- tv = (struct timeval) {
- .tv_sec = ticks / HZ,
- .tv_usec = ((ticks % HZ) * 1000000) / HZ
- };
- set_fs(KERNEL_DS);
- rc = sock_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
- (char *)&tv, sizeof(tv));
- set_fs(oldmm);
- if (rc != 0) {
- CERROR("Can't set socket recv timeout %d: %d\n",
- timeout, rc);
- return rc;
- }
-
- set_fs(KERNEL_DS);
- then = jiffies;
- rc = sock_recvmsg(sock, &msg, iov.iov_len, 0);
- ticks -= jiffies - then;
- set_fs(oldmm);
-
- if (rc < 0)
- return rc;
-
- if (rc == 0)
- return -ECONNABORTED;
-
- buffer = ((char *)buffer) + rc;
- nob -= rc;
-
- if (nob == 0)
- return 0;
-
- if (ticks <= 0)
- return -ETIMEDOUT;
- }
-}
-
-int
-kranal_create_sock(struct socket **sockp)
-{
- struct socket *sock;
- int rc;
- struct timeval tv;
- int option;
- mm_segment_t oldmm = get_fs();
-
- rc = sock_create(PF_INET, SOCK_STREAM, 0, &sock);
- if (rc != 0) {
- CERROR("Can't create socket: %d\n", rc);
- return rc;
- }
-
- /* Ensure sending connection info doesn't block */
- option = 2 * sizeof(kra_connreq_t);
- set_fs(KERNEL_DS);
- rc = sock_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
- (char *)&option, sizeof(option));
- set_fs(oldmm);
- if (rc != 0) {
- CERROR("Can't set send buffer %d: %d\n", option, rc);
- goto failed;
- }
-
- option = 1;
- set_fs(KERNEL_DS);
- rc = sock_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *)&option, sizeof(option));
- set_fs(oldmm);
- if (rc != 0) {
- CERROR("Can't set SO_REUSEADDR: %d\n", rc);
- goto failed;
- }
-
- *sockp = sock;
- return 0;
-
- failed:
- sock_release(sock);
- return rc;
-}
-
-void
-kranal_pause(int ticks)
-{
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(ticks);
-}
-
-void
-kranal_pack_connreq(kra_connreq_t *connreq, kra_conn_t *conn)
-{
- RAP_RETURN rrc;
-
- memset(connreq, 0, sizeof(*connreq));
-
- connreq->racr_magic = RANAL_MSG_MAGIC;
- connreq->racr_version = RANAL_MSG_VERSION;
- connreq->racr_devid = conn->rac_device->rad_id;
- connreq->racr_nid = kranal_lib.libnal_ni.ni_pid.nid;
- connreq->racr_timeout = conn->rac_timeout;
- connreq->racr_incarnation = conn->rac_my_incarnation;
-
- rrc = RapkGetRiParams(conn->rac_rihandle, &connreq->racr_riparams);
- LASSERT(rrc == RAP_SUCCESS);
-}
-
-int
-kranal_recv_connreq(struct socket *sock, kra_connreq_t *connreq, int timeout)
-{
- int i;
- int rc;
-
- rc = kranal_sock_read(sock, connreq, sizeof(*connreq), timeout);
- if (rc != 0) {
- CERROR("Read failed: %d\n", rc);
- return rc;
- }
-
- if (connreq->racr_magic != RANAL_MSG_MAGIC) {
- if (__swab32(connreq->racr_magic) != RANAL_MSG_MAGIC) {
- CERROR("Unexpected magic %08x\n", connreq->racr_magic);
- return -EPROTO;
- }
-
- __swab32s(&connreq->racr_magic);
- __swab16s(&connreq->racr_version);
- __swab16s(&connreq->racr_devid);
- __swab64s(&connreq->racr_nid);
- __swab64s(&connreq->racr_incarnation);
- __swab32s(&connreq->racr_timeout);
-
- __swab32s(&connreq->racr_riparams.FmaDomainHndl);
- __swab32s(&connreq->racr_riparams.RcvCqHndl);
- __swab32s(&connreq->racr_riparams.PTag);
- __swab32s(&connreq->racr_riparams.CompletionCookie);
- }
-
- if (connreq->racr_version != RANAL_MSG_VERSION) {
- CERROR("Unexpected version %d\n", connreq->racr_version);
- return -EPROTO;
- }
-
- if (connreq->racr_nid == PTL_NID_ANY) {
- CERROR("Received PTL_NID_ANY\n");
- return -EPROTO;
- }
-
- if (connreq->racr_timeout < RANAL_MIN_TIMEOUT) {
- CERROR("Received timeout %d < MIN %d\n",
- connreq->racr_timeout, RANAL_MIN_TIMEOUT);
- return -EPROTO;
- }
-
- for (i = 0; i < kranal_data.kra_ndevs; i++)
- if (connreq->racr_devid ==
- kranal_data.kra_devices[i].rad_id)
- break;
-
- if (i == kranal_data.kra_ndevs) {
- CERROR("Can't match device %d\n", connreq->racr_devid);
- return -ENODEV;
- }
-
- return 0;
-}
-
-int
-kranal_conn_isdup_locked(kra_peer_t *peer, __u64 incarnation)
-{
- kra_conn_t *conn;
- struct list_head *tmp;
- int loopback = 0;
-
- list_for_each(tmp, &peer->rap_conns) {
- conn = list_entry(tmp, kra_conn_t, rac_list);
-
- if (conn->rac_peer_incarnation < incarnation) {
- /* Conns with an older incarnation get culled later */
- continue;
- }
-
- if (!loopback &&
- conn->rac_peer_incarnation == incarnation &&
- peer->rap_nid == kranal_lib.libnal_ni.ni_pid.nid) {
- /* loopback creates 2 conns */
- loopback = 1;
- continue;
- }
-
- return 1;
- }
-
- return 0;
-}
-
-void
-kranal_set_conn_uniqueness (kra_conn_t *conn)
-{
- unsigned long flags;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- conn->rac_my_incarnation = kranal_data.kra_next_incarnation++;
-
- do { /* allocate a unique cqid */
- conn->rac_cqid = kranal_data.kra_next_cqid++;
- } while (kranal_cqid2conn_locked(conn->rac_cqid) != NULL);
-
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-}
-
-int
-kranal_alloc_conn(kra_conn_t **connp, kra_device_t *dev)
-{
- kra_conn_t *conn;
- RAP_RETURN rrc;
-
- LASSERT (!in_interrupt());
- PORTAL_ALLOC(conn, sizeof(*conn));
-
- if (conn == NULL)
- return -ENOMEM;
-
- memset(conn, 0, sizeof(*conn));
- atomic_set(&conn->rac_refcount, 1);
- INIT_LIST_HEAD(&conn->rac_list);
- INIT_LIST_HEAD(&conn->rac_hashlist);
- INIT_LIST_HEAD(&conn->rac_fmaq);
- INIT_LIST_HEAD(&conn->rac_rdmaq);
- INIT_LIST_HEAD(&conn->rac_replyq);
- spin_lock_init(&conn->rac_lock);
-
- kranal_set_conn_uniqueness(conn);
-
- conn->rac_timeout = MAX(kranal_tunables.kra_timeout, RANAL_MIN_TIMEOUT);
- kranal_update_reaper_timeout(conn->rac_timeout);
-
- rrc = RapkCreateRi(dev->rad_handle, conn->rac_cqid,
- dev->rad_ptag,
- dev->rad_rdma_cq, dev->rad_fma_cq,
- &conn->rac_rihandle);
- if (rrc != RAP_SUCCESS) {
- CERROR("RapkCreateRi failed: %d\n", rrc);
- PORTAL_FREE(conn, sizeof(*conn));
- return -ENETDOWN;
- }
-
- atomic_inc(&kranal_data.kra_nconns);
- *connp = conn;
- return 0;
-}
-
-void
-__kranal_conn_decref(kra_conn_t *conn)
-{
- kra_tx_t *tx;
- RAP_RETURN rrc;
-
- LASSERT (!in_interrupt());
- LASSERT (!conn->rac_scheduled);
- LASSERT (list_empty(&conn->rac_list));
- LASSERT (list_empty(&conn->rac_hashlist));
- LASSERT (atomic_read(&conn->rac_refcount) == 0);
-
- while (!list_empty(&conn->rac_fmaq)) {
- tx = list_entry(conn->rac_fmaq.next, kra_tx_t, tx_list);
-
- list_del(&tx->tx_list);
- kranal_tx_done(tx, -ECONNABORTED);
- }
-
- /* We may not destroy this connection while it has RDMAs outstanding */
- LASSERT (list_empty(&conn->rac_rdmaq));
-
- while (!list_empty(&conn->rac_replyq)) {
- tx = list_entry(conn->rac_replyq.next, kra_tx_t, tx_list);
-
- list_del(&tx->tx_list);
- kranal_tx_done(tx, -ECONNABORTED);
- }
-
- rrc = RapkDestroyRi(conn->rac_device->rad_handle,
- conn->rac_rihandle);
- LASSERT (rrc == RAP_SUCCESS);
-
- if (conn->rac_peer != NULL)
- kranal_peer_decref(conn->rac_peer);
-
- PORTAL_FREE(conn, sizeof(*conn));
- atomic_dec(&kranal_data.kra_nconns);
-}
-
-void
-kranal_terminate_conn_locked (kra_conn_t *conn)
-{
- kra_peer_t *peer = conn->rac_peer;
-
- LASSERT (!in_interrupt());
- LASSERT (conn->rac_closing);
- LASSERT (!list_empty(&conn->rac_hashlist));
- LASSERT (list_empty(&conn->rac_list));
-
- /* Remove from conn hash table (no new callbacks) */
- list_del_init(&conn->rac_hashlist);
- kranal_conn_decref(conn);
-
- /* Conn is now just waiting for remaining refs to go */
-}
-
-void
-kranal_close_conn_locked (kra_conn_t *conn, int error)
-{
- kra_peer_t *peer = conn->rac_peer;
-
- CDEBUG(error == 0 ? D_NET : D_ERROR,
- "closing conn to "LPX64": error %d\n", peer->rap_nid, error);
-
- LASSERT (!in_interrupt());
- LASSERT (!conn->rac_closing);
- LASSERT (!list_empty(&conn->rac_hashlist));
- LASSERT (!list_empty(&conn->rac_list));
-
- list_del_init(&conn->rac_list);
-
- if (list_empty(&peer->rap_conns) &&
- peer->rap_persistence == 0) {
- /* Non-persistent peer with no more conns... */
- kranal_unlink_peer_locked(peer);
- }
-
- conn->rac_closing = 1;
- kranal_schedule_conn(conn);
-
- kranal_conn_decref(conn); /* lose peer's ref */
-}
-
-void
-kranal_close_conn (kra_conn_t *conn, int error)
-{
- unsigned long flags;
-
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (!conn->rac_closing)
- kranal_close_conn_locked(conn, error);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-}
-
-int
-kranal_passive_conn_handshake (struct socket *sock,
- ptl_nid_t *peer_nidp, kra_conn_t **connp)
-{
- struct sockaddr_in addr;
- __u32 peer_ip;
- unsigned int peer_port;
- kra_connreq_t connreq;
- ptl_nid_t peer_nid;
- kra_conn_t *conn;
- kra_device_t *dev;
- RAP_RETURN rrc;
- int rc;
- int len;
- int i;
-
- len = sizeof(addr);
- rc = sock->ops->getname(sock, (struct sockaddr *)&addr, &len, 2);
- if (rc != 0) {
- CERROR("Can't get peer's IP: %d\n", rc);
- return rc;
- }
-
- peer_ip = ntohl(addr.sin_addr.s_addr);
- peer_port = ntohs(addr.sin_port);
-
- if (peer_port >= 1024) {
- CERROR("Refusing unprivileged connection from %u.%u.%u.%u/%d\n",
- HIPQUAD(peer_ip), peer_port);
- return -ECONNREFUSED;
- }
-
- rc = kranal_recv_connreq(sock, &connreq,
- kranal_tunables.kra_listener_timeout);
- if (rc != 0) {
- CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rc);
- return rc;
- }
-
- peer_nid = connreq.racr_nid;
- LASSERT (peer_nid != PTL_NID_ANY);
-
- for (i = 0;;i++) {
- LASSERT(i < kranal_data.kra_ndevs);
- dev = &kranal_data.kra_devices[i];
- if (dev->rad_id == connreq.racr_devid)
- break;
- }
-
- rc = kranal_alloc_conn(&conn, dev);
- if (rc != 0)
- return rc;
-
- conn->rac_peer_incarnation = connreq.racr_incarnation;
- conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq.racr_timeout);
- kranal_update_reaper_timeout(conn->rac_keepalive);
-
- rrc = RapkSetRiParams(conn->rac_rihandle, &connreq.racr_riparams);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't set riparams for "LPX64": %d\n", peer_nid, rrc);
- kranal_conn_decref(conn);
- return -EPROTO;
- }
-
- kranal_pack_connreq(&connreq, conn);
-
- rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
- if (rc != 0) {
- CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer_ip), peer_port, rc);
- kranal_conn_decref(conn);
- return rc;
- }
-
- *connp = conn;
- *peer_nidp = peer_nid;
- return 0;
-}
-
-int
-ranal_connect_sock(kra_peer_t *peer, struct socket **sockp)
-{
- struct sockaddr_in locaddr;
- struct sockaddr_in srvaddr;
- struct socket *sock;
- unsigned int port;
- int rc;
- int option;
- mm_segment_t oldmm = get_fs();
- struct timeval tv;
-
- for (port = 1023; port >= 512; port--) {
-
- memset(&locaddr, 0, sizeof(locaddr));
- locaddr.sin_family = AF_INET;
- locaddr.sin_port = htons(port);
- locaddr.sin_addr.s_addr = htonl(INADDR_ANY);
-
- memset (&srvaddr, 0, sizeof (srvaddr));
- srvaddr.sin_family = AF_INET;
- srvaddr.sin_port = htons (peer->rap_port);
- srvaddr.sin_addr.s_addr = htonl (peer->rap_ip);
-
- rc = kranal_create_sock(&sock);
- if (rc != 0)
- return rc;
-
- rc = sock->ops->bind(sock,
- (struct sockaddr *)&locaddr, sizeof(locaddr));
- if (rc != 0) {
- sock_release(sock);
-
- if (rc == -EADDRINUSE) {
- CDEBUG(D_NET, "Port %d already in use\n", port);
- continue;
- }
-
- CERROR("Can't bind to reserved port %d: %d\n", port, rc);
- return rc;
- }
-
- rc = sock->ops->connect(sock,
- (struct sockaddr *)&srvaddr, sizeof(srvaddr),
- 0);
- if (rc == 0) {
- *sockp = sock;
- return 0;
- }
-
- sock_release(sock);
-
- if (rc != -EADDRNOTAVAIL) {
- CERROR("Can't connect port %d to %u.%u.%u.%u/%d: %d\n",
- port, HIPQUAD(peer->rap_ip), peer->rap_port, rc);
- return rc;
- }
-
- CDEBUG(D_NET, "Port %d not available for %u.%u.%u.%u/%d\n",
- port, HIPQUAD(peer->rap_ip), peer->rap_port);
- }
-
- /* all ports busy */
- return -EHOSTUNREACH;
-}
-
-
-int
-kranal_active_conn_handshake(kra_peer_t *peer, kra_conn_t **connp)
-{
- struct sockaddr_in dstaddr;
- kra_connreq_t connreq;
- kra_conn_t *conn;
- kra_device_t *dev;
- struct socket *sock;
- RAP_RETURN rrc;
- int rc;
- int idx;
-
- idx = peer->rap_nid & 0x7fffffff;
- dev = &kranal_data.kra_devices[idx % kranal_data.kra_ndevs];
-
- rc = kranal_alloc_conn(&conn, dev);
- if (rc != 0)
- return rc;
-
- kranal_pack_connreq(&connreq, conn);
-
- rc = ranal_connect_sock(peer, &sock);
- if (rc != 0)
- goto failed_0;
-
- /* CAVEAT EMPTOR: the passive side receives with a SHORT rx timeout
- * immediately after accepting a connection, so we connect and then
- * send immediately. */
-
- rc = kranal_sock_write(sock, &connreq, sizeof(connreq));
- if (rc != 0) {
- CERROR("Can't tx connreq to %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer->rap_ip), peer->rap_port, rc);
- goto failed_1;
- }
-
- rc = kranal_recv_connreq(sock, &connreq, kranal_tunables.kra_timeout);
- if (rc != 0) {
- CERROR("Can't rx connreq from %u.%u.%u.%u/%d: %d\n",
- HIPQUAD(peer->rap_ip), peer->rap_port, rc);
- goto failed_1;
- }
-
- sock_release(sock);
- rc = -EPROTO;
-
- if (connreq.racr_nid != peer->rap_nid) {
- CERROR("Unexpected nid from %u.%u.%u.%u/%d: "
- "received "LPX64" expected "LPX64"\n",
- HIPQUAD(peer->rap_ip), peer->rap_port,
- connreq.racr_nid, peer->rap_nid);
- goto failed_0;
- }
-
- if (connreq.racr_devid != dev->rad_id) {
- CERROR("Unexpected device id from %u.%u.%u.%u/%d: "
- "received %d expected %d\n",
- HIPQUAD(peer->rap_ip), peer->rap_port,
- connreq.racr_devid, dev->rad_id);
- goto failed_0;
- }
-
- conn->rac_peer_incarnation = connreq.racr_incarnation;
- conn->rac_keepalive = RANAL_TIMEOUT2KEEPALIVE(connreq.racr_timeout);
- kranal_update_reaper_timeout(conn->rac_keepalive);
-
- rc = -ENETDOWN;
- rrc = RapkSetRiParams(conn->rac_rihandle, &connreq.racr_riparams);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't set riparams for "LPX64": %d\n",
- peer->rap_nid, rrc);
- goto failed_0;
- }
-
- *connp = conn;
- return 0;
-
- failed_1:
- sock_release(sock);
- failed_0:
- kranal_conn_decref(conn);
- return rc;
-}
-
-int
-kranal_conn_handshake (struct socket *sock, kra_peer_t *peer)
-{
- kra_peer_t *peer2;
- kra_tx_t *tx;
- ptl_nid_t peer_nid;
- unsigned long flags;
- unsigned long timeout;
- kra_conn_t *conn;
- int rc;
- int nstale;
-
- if (sock != NULL) {
- /* passive: listener accepted sock */
- LASSERT (peer == NULL);
-
- rc = kranal_passive_conn_handshake(sock, &peer_nid, &conn);
- if (rc != 0)
- return rc;
-
- /* assume this is a new peer */
- peer = kranal_create_peer(peer_nid);
- if (peer == NULL) {
- CERROR("Can't allocate peer for "LPX64"\n", peer_nid);
- kranal_conn_decref(conn);
- return -ENOMEM;
- }
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- peer2 = kranal_find_peer_locked(peer_nid);
- if (peer2 == NULL) {
- /* peer table takes my initial ref on peer */
- list_add_tail(&peer->rap_list,
- kranal_nid2peerlist(peer_nid));
- } else {
- /* peer_nid already in the peer table */
- kranal_peer_decref(peer);
- peer = peer2;
- }
- /* NB I may now have a non-persistent peer in the peer
- * table with no connections: I can't drop the global lock
- * until I've given it a connection or removed it, and when
- * I do 'peer' can disappear under me. */
- } else {
- /* active: connd wants to connect to peer */
- LASSERT (peer != NULL);
- LASSERT (peer->rap_connecting);
-
- rc = kranal_active_conn_handshake(peer, &conn);
- if (rc != 0)
- return rc;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (!kranal_peer_active(peer)) {
- /* raced with peer getting unlinked */
- write_unlock_irqrestore(&kranal_data.kra_global_lock,
- flags);
- kranal_conn_decref(conn);
- return ESTALE;
- }
- }
-
- LASSERT (kranal_peer_active(peer)); /* peer is in the peer table */
- peer_nid = peer->rap_nid;
-
- /* Refuse to duplicate an existing connection (both sides might try
- * to connect at once). NB we return success! We _do_ have a
- * connection (so we don't need to remove the peer from the peer
- * table) and we _don't_ have any blocked txs to complete */
- if (kranal_conn_isdup_locked(peer, conn->rac_peer_incarnation)) {
- LASSERT (!list_empty(&peer->rap_conns));
- LASSERT (list_empty(&peer->rap_tx_queue));
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
- CWARN("Not creating duplicate connection to "LPX64"\n",
- peer_nid);
- kranal_conn_decref(conn);
- return 0;
- }
-
- kranal_peer_addref(peer); /* +1 ref for conn */
- conn->rac_peer = peer;
- list_add_tail(&conn->rac_list, &peer->rap_conns);
-
- kranal_conn_addref(conn); /* +1 ref for conn table */
- list_add_tail(&conn->rac_hashlist,
- kranal_cqid2connlist(conn->rac_cqid));
-
- /* Schedule all packets blocking for a connection */
- while (!list_empty(&peer->rap_tx_queue)) {
- tx = list_entry(&peer->rap_tx_queue.next,
- kra_tx_t, tx_list);
-
- list_del(&tx->tx_list);
- kranal_post_fma(conn, tx);
- }
-
- nstale = kranal_close_stale_conns_locked(peer, conn->rac_peer_incarnation);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- /* CAVEAT EMPTOR: passive peer can disappear NOW */
-
- if (nstale != 0)
- CWARN("Closed %d stale conns to "LPX64"\n", nstale, peer_nid);
-
- /* Ensure conn gets checked. Transmits may have been queued and an
- * FMA event may have happened before it got in the cq hash table */
- kranal_schedule_conn(conn);
- return 0;
-}
-
-void
-kranal_connect (kra_peer_t *peer)
-{
- kra_tx_t *tx;
- unsigned long flags;
- struct list_head zombies;
- int rc;
-
- LASSERT (peer->rap_connecting);
-
- rc = kranal_conn_handshake(NULL, peer);
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- LASSERT (peer->rap_connecting);
- peer->rap_connecting = 0;
-
- if (rc == 0) {
- /* kranal_conn_handshake() queues blocked txs immediately on
- * success to avoid messages jumping the queue */
- LASSERT (list_empty(&peer->rap_tx_queue));
-
- /* reset reconnection timeouts */
- peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
- peer->rap_reconnect_time = CURRENT_TIME;
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
- return;
- }
-
- LASSERT (peer->rap_reconnect_interval != 0);
- peer->rap_reconnect_time = CURRENT_TIME + peer->rap_reconnect_interval;
- peer->rap_reconnect_interval = MAX(RANAL_MAX_RECONNECT_INTERVAL,
- 1 * peer->rap_reconnect_interval);
-
- /* Grab all blocked packets while we have the global lock */
- list_add(&zombies, &peer->rap_tx_queue);
- list_del_init(&peer->rap_tx_queue);
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- if (list_empty(&zombies))
- return;
-
- CWARN("Dropping packets for "LPX64": connection failed\n",
- peer->rap_nid);
-
- do {
- tx = list_entry(zombies.next, kra_tx_t, tx_list);
-
- list_del(&tx->tx_list);
- kranal_tx_done(tx, -EHOSTUNREACH);
-
- } while (!list_empty(&zombies));
-}
-
-int
-kranal_listener(void *arg)
-{
- struct sockaddr_in addr;
- wait_queue_t wait;
- struct socket *sock;
- struct socket *newsock;
- int port;
- kra_connreq_t *connreqs;
- char name[16];
- int rc;
-
- /* Parent thread holds kra_nid_mutex, and is, or is about to
- * block on kra_listener_signal */
-
- port = kranal_tunables.kra_port;
- snprintf(name, sizeof(name), "kranal_lstn%03d", port);
- kportal_daemonize(name);
- kportal_blockallsigs();
-
- init_waitqueue_entry(&wait, current);
-
- rc = -ENOMEM;
- PORTAL_ALLOC(connreqs, 2 * sizeof(*connreqs));
- if (connreqs == NULL)
- goto out_0;
-
- rc = kranal_create_sock(&sock);
- if (rc != 0)
- goto out_1;
-
- memset(&addr, 0, sizeof(addr));
- addr.sin_family = AF_INET;
- addr.sin_port = htons(port);
- addr.sin_addr.s_addr = INADDR_ANY;
-
- rc = sock->ops->bind(sock, (struct sockaddr *)&addr, sizeof(addr));
- if (rc != 0) {
- CERROR("Can't bind to port %d\n", port);
- goto out_2;
- }
-
- rc = sock->ops->listen(sock, kranal_tunables.kra_backlog);
- if (rc != 0) {
- CERROR("Can't set listen backlog %d: %d\n",
- kranal_tunables.kra_backlog, rc);
- goto out_2;
- }
-
- LASSERT (kranal_data.kra_listener_sock == NULL);
- kranal_data.kra_listener_sock = sock;
-
- /* unblock waiting parent */
- LASSERT (kranal_data.kra_listener_shutdown == 0);
- up(&kranal_data.kra_listener_signal);
-
- /* Wake me any time something happens on my socket */
- add_wait_queue(sock->sk->sk_sleep, &wait);
-
- while (kranal_data.kra_listener_shutdown == 0) {
-
- newsock = sock_alloc();
- if (newsock == NULL) {
- CERROR("Can't allocate new socket for accept\n");
- kranal_pause(HZ);
- continue;
- }
-
- set_current_state(TASK_INTERRUPTIBLE);
-
- rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
-
- if (rc == -EAGAIN &&
- kranal_data.kra_listener_shutdown == 0)
- schedule();
-
- set_current_state(TASK_RUNNING);
-
- if (rc != 0) {
- sock_release(newsock);
- if (rc != -EAGAIN) {
- CERROR("Accept failed: %d\n", rc);
- kranal_pause(HZ);
- }
- continue;
- }
-
- kranal_conn_handshake(newsock, NULL);
- sock_release(newsock);
- }
-
- rc = 0;
- remove_wait_queue(sock->sk->sk_sleep, &wait);
- out_2:
- sock_release(sock);
- kranal_data.kra_listener_sock = NULL;
- out_1:
- PORTAL_FREE(connreqs, 2 * sizeof(*connreqs));
- out_0:
- /* set completion status and unblock thread waiting for me
- * (parent on startup failure, executioner on normal shutdown) */
- kranal_data.kra_listener_shutdown = rc;
- up(&kranal_data.kra_listener_signal);
-
- return 0;
-}
-
-int
-kranal_start_listener (void)
-{
- long pid;
- int rc;
-
- CDEBUG(D_WARNING, "Starting listener\n");
-
- /* Called holding kra_nid_mutex: listener stopped */
- LASSERT (kranal_data.kra_listener_sock == NULL);
-
- kranal_data.kra_listener_shutdown == 0;
- pid = kernel_thread(kranal_listener, NULL, 0);
- if (pid < 0) {
- CERROR("Can't spawn listener: %ld\n", pid);
- return (int)pid;
- }
-
- /* Block until listener has started up. */
- down(&kranal_data.kra_listener_signal);
-
- rc = kranal_data.kra_listener_shutdown;
- LASSERT ((rc != 0) == (kranal_data.kra_listener_sock == NULL));
-
- CDEBUG(D_WARNING, "Listener %ld started OK\n", pid);
- return rc;
-}
-
-void
-kranal_stop_listener(void)
-{
- CDEBUG(D_WARNING, "Stopping listener\n");
-
- /* Called holding kra_nid_mutex: listener running */
- LASSERT (kranal_data.kra_listener_sock != NULL);
-
- kranal_data.kra_listener_shutdown = 1;
- wake_up_all(kranal_data.kra_listener_sock->sk->sk_sleep);
-
- /* Block until listener has torn down. */
- down(&kranal_data.kra_listener_signal);
-
- LASSERT (kranal_data.kra_listener_sock == NULL);
- CDEBUG(D_WARNING, "Listener stopped\n");
-}
-
-int
-kranal_listener_procint(ctl_table *table, int write, struct file *filp,
- void *buffer, size_t *lenp)
-{
- int *tunable = (int *)table->data;
- int old_val;
- int rc;
-
- down(&kranal_data.kra_nid_mutex);
-
- LASSERT (tunable == &kranal_tunables.kra_port ||
- tunable == &kranal_tunables.kra_backlog);
- old_val = *tunable;
-
- rc = proc_dointvec(table, write, filp, buffer, lenp);
-
- if (write &&
- (*tunable != old_val ||
- kranal_data.kra_listener_sock == NULL)) {
-
- if (kranal_data.kra_listener_sock != NULL)
- kranal_stop_listener();
-
- rc = kranal_start_listener();
-
- if (rc != 0) {
- *tunable = old_val;
- kranal_start_listener();
- }
- }
-
- up(&kranal_data.kra_nid_mutex);
- return rc;
-}
-
-int
-kranal_set_mynid(ptl_nid_t nid)
-{
- lib_ni_t *ni = &kranal_lib.libnal_ni;
- int rc = 0;
-
- CDEBUG(D_NET, "setting mynid to "LPX64" (old nid="LPX64")\n",
- nid, ni->ni_pid.nid);
-
- down(&kranal_data.kra_nid_mutex);
-
- if (nid == ni->ni_pid.nid) {
- /* no change of NID */
- up(&kranal_data.kra_nid_mutex);
- return 0;
- }
-
- if (kranal_data.kra_listener_sock != NULL)
- kranal_stop_listener();
-
- ni->ni_pid.nid = nid;
-
- /* Delete all existing peers and their connections after new
- * NID/incarnation set to ensure no old connections in our brave
- * new world. */
- kranal_del_peer(PTL_NID_ANY, 0);
-
- if (nid != PTL_NID_ANY)
- rc = kranal_start_listener();
-
- up(&kranal_data.kra_nid_mutex);
- return rc;
-}
-
-kra_peer_t *
-kranal_create_peer (ptl_nid_t nid)
-{
- kra_peer_t *peer;
-
- LASSERT (nid != PTL_NID_ANY);
-
- PORTAL_ALLOC(peer, sizeof(*peer));
- if (peer == NULL)
- return NULL;
-
- memset(peer, 0, sizeof(*peer)); /* zero flags etc */
-
- peer->rap_nid = nid;
- atomic_set(&peer->rap_refcount, 1); /* 1 ref for caller */
-
- INIT_LIST_HEAD(&peer->rap_list); /* not in the peer table yet */
- INIT_LIST_HEAD(&peer->rap_conns);
- INIT_LIST_HEAD(&peer->rap_tx_queue);
-
- peer->rap_reconnect_time = CURRENT_TIME;
- peer->rap_reconnect_interval = RANAL_MIN_RECONNECT_INTERVAL;
-
- atomic_inc(&kranal_data.kra_npeers);
- return peer;
-}
-
-void
-__kranal_peer_decref (kra_peer_t *peer)
-{
- CDEBUG(D_NET, "peer "LPX64" %p deleted\n", peer->rap_nid, peer);
-
- LASSERT (atomic_read(&peer->rap_refcount) == 0);
- LASSERT (peer->rap_persistence == 0);
- LASSERT (!kranal_peer_active(peer));
- LASSERT (peer->rap_connecting == 0);
- LASSERT (list_empty(&peer->rap_conns));
- LASSERT (list_empty(&peer->rap_tx_queue));
-
- PORTAL_FREE(peer, sizeof(*peer));
-
- /* NB a peer's connections keep a reference on their peer until
- * they are destroyed, so we can be assured that _all_ state to do
- * with this peer has been cleaned up when its refcount drops to
- * zero. */
- atomic_dec(&kranal_data.kra_npeers);
-}
-
-kra_peer_t *
-kranal_find_peer_locked (ptl_nid_t nid)
-{
- struct list_head *peer_list = kranal_nid2peerlist(nid);
- struct list_head *tmp;
- kra_peer_t *peer;
-
- list_for_each (tmp, peer_list) {
-
- peer = list_entry(tmp, kra_peer_t, rap_list);
-
- LASSERT (peer->rap_persistence > 0 || /* persistent peer */
- !list_empty(&peer->rap_conns)); /* active conn */
-
- if (peer->rap_nid != nid)
- continue;
-
- CDEBUG(D_NET, "got peer [%p] -> "LPX64" (%d)\n",
- peer, nid, atomic_read(&peer->rap_refcount));
- return peer;
- }
- return NULL;
-}
-
-kra_peer_t *
-kranal_find_peer (ptl_nid_t nid)
-{
- kra_peer_t *peer;
-
- read_lock(&kranal_data.kra_global_lock);
- peer = kranal_find_peer_locked(nid);
- if (peer != NULL) /* +1 ref for caller? */
- kranal_peer_addref(peer);
- read_unlock(&kranal_data.kra_global_lock);
-
- return peer;
-}
-
-void
-kranal_unlink_peer_locked (kra_peer_t *peer)
-{
- LASSERT (peer->rap_persistence == 0);
- LASSERT (list_empty(&peer->rap_conns));
-
- LASSERT (kranal_peer_active(peer));
- list_del_init(&peer->rap_list);
-
- /* lose peerlist's ref */
- kranal_peer_decref(peer);
-}
-
-int
-kranal_get_peer_info (int index, ptl_nid_t *nidp, __u32 *ipp, int *portp,
- int *persistencep)
-{
- kra_peer_t *peer;
- struct list_head *ptmp;
- int i;
-
- read_lock(&kranal_data.kra_global_lock);
-
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
-
- list_for_each(ptmp, &kranal_data.kra_peers[i]) {
-
- peer = list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !list_empty(&peer->rap_conns));
-
- if (index-- > 0)
- continue;
-
- *nidp = peer->rap_nid;
- *ipp = peer->rap_ip;
- *portp = peer->rap_port;
- *persistencep = peer->rap_persistence;
-
- read_unlock(&kranal_data.kra_global_lock);
- return 0;
- }
- }
-
- read_unlock(&kranal_data.kra_global_lock);
- return -ENOENT;
-}
-
-int
-kranal_add_persistent_peer (ptl_nid_t nid, __u32 ip, int port)
-{
- unsigned long flags;
- kra_peer_t *peer;
- kra_peer_t *peer2;
-
- if (nid == PTL_NID_ANY)
- return -EINVAL;
-
- peer = kranal_create_peer(nid);
- if (peer == NULL)
- return -ENOMEM;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- peer2 = kranal_find_peer_locked(nid);
- if (peer2 != NULL) {
- kranal_peer_decref(peer);
- peer = peer2;
- } else {
- /* peer table takes existing ref on peer */
- list_add_tail(&peer->rap_list,
- kranal_nid2peerlist(nid));
- }
-
- peer->rap_ip = ip;
- peer->rap_port = port;
- peer->rap_persistence++;
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
- return 0;
-}
-
-void
-kranal_del_peer_locked (kra_peer_t *peer, int single_share)
-{
- struct list_head *ctmp;
- struct list_head *cnxt;
- kra_conn_t *conn;
-
- if (!single_share)
- peer->rap_persistence = 0;
- else if (peer->rap_persistence > 0)
- peer->rap_persistence--;
-
- if (peer->rap_persistence != 0)
- return;
-
- if (list_empty(&peer->rap_conns)) {
- kranal_unlink_peer_locked(peer);
- } else {
- list_for_each_safe(ctmp, cnxt, &peer->rap_conns) {
- conn = list_entry(ctmp, kra_conn_t, rac_list);
-
- kranal_close_conn_locked(conn, 0);
- }
- /* peer unlinks itself when last conn is closed */
- }
-}
-
-int
-kranal_del_peer (ptl_nid_t nid, int single_share)
-{
- unsigned long flags;
- struct list_head *ptmp;
- struct list_head *pnxt;
- kra_peer_t *peer;
- int lo;
- int hi;
- int i;
- int rc = -ENOENT;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (nid != PTL_NID_ANY)
- lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
- else {
- lo = 0;
- hi = kranal_data.kra_peer_hash_size - 1;
- }
-
- for (i = lo; i <= hi; i++) {
- list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
- peer = list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !list_empty(&peer->rap_conns));
-
- if (!(nid == PTL_NID_ANY || peer->rap_nid == nid))
- continue;
-
- kranal_del_peer_locked(peer, single_share);
- rc = 0; /* matched something */
-
- if (single_share)
- goto out;
- }
- }
- out:
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- return rc;
-}
-
-kra_conn_t *
-kranal_get_conn_by_idx (int index)
-{
- kra_peer_t *peer;
- struct list_head *ptmp;
- kra_conn_t *conn;
- struct list_head *ctmp;
- int i;
-
- read_lock (&kranal_data.kra_global_lock);
-
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++) {
- list_for_each (ptmp, &kranal_data.kra_peers[i]) {
-
- peer = list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !list_empty(&peer->rap_conns));
-
- list_for_each (ctmp, &peer->rap_conns) {
- if (index-- > 0)
- continue;
-
- conn = list_entry(ctmp, kra_conn_t, rac_list);
- CDEBUG(D_NET, "++conn[%p] -> "LPX64" (%d)\n",
- conn, conn->rac_peer->rap_nid,
- atomic_read(&conn->rac_refcount));
- atomic_inc(&conn->rac_refcount);
- read_unlock(&kranal_data.kra_global_lock);
- return conn;
- }
- }
- }
-
- read_unlock(&kranal_data.kra_global_lock);
- return NULL;
-}
-
-int
-kranal_close_peer_conns_locked (kra_peer_t *peer, int why)
-{
- kra_conn_t *conn;
- struct list_head *ctmp;
- struct list_head *cnxt;
- int count = 0;
-
- list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
- conn = list_entry(ctmp, kra_conn_t, rac_list);
-
- count++;
- kranal_close_conn_locked(conn, why);
- }
-
- return count;
-}
-
-int
-kranal_close_stale_conns_locked (kra_peer_t *peer, __u64 incarnation)
-{
- kra_conn_t *conn;
- struct list_head *ctmp;
- struct list_head *cnxt;
- int count = 0;
-
- list_for_each_safe (ctmp, cnxt, &peer->rap_conns) {
- conn = list_entry(ctmp, kra_conn_t, rac_list);
-
- if (conn->rac_peer_incarnation == incarnation)
- continue;
-
- CDEBUG(D_NET, "Closing stale conn nid:"LPX64" incarnation:"LPX64"("LPX64")\n",
- peer->rap_nid, conn->rac_peer_incarnation, incarnation);
- LASSERT (conn->rac_peer_incarnation < incarnation);
-
- count++;
- kranal_close_conn_locked(conn, -ESTALE);
- }
-
- return count;
-}
-
-int
-kranal_close_matching_conns (ptl_nid_t nid)
-{
- unsigned long flags;
- kra_peer_t *peer;
- struct list_head *ptmp;
- struct list_head *pnxt;
- int lo;
- int hi;
- int i;
- int count = 0;
-
- write_lock_irqsave(&kranal_data.kra_global_lock, flags);
-
- if (nid != PTL_NID_ANY)
- lo = hi = kranal_nid2peerlist(nid) - kranal_data.kra_peers;
- else {
- lo = 0;
- hi = kranal_data.kra_peer_hash_size - 1;
- }
-
- for (i = lo; i <= hi; i++) {
- list_for_each_safe (ptmp, pnxt, &kranal_data.kra_peers[i]) {
-
- peer = list_entry(ptmp, kra_peer_t, rap_list);
- LASSERT (peer->rap_persistence > 0 ||
- !list_empty(&peer->rap_conns));
-
- if (!(nid == PTL_NID_ANY || nid == peer->rap_nid))
- continue;
-
- count += kranal_close_peer_conns_locked(peer, 0);
- }
- }
-
- write_unlock_irqrestore(&kranal_data.kra_global_lock, flags);
-
- /* wildcards always succeed */
- if (nid == PTL_NID_ANY)
- return 0;
-
- return (count == 0) ? -ENOENT : 0;
-}
-
-int
-kranal_cmd(struct portals_cfg *pcfg, void * private)
-{
- int rc = -EINVAL;
-
- LASSERT (pcfg != NULL);
-
- switch(pcfg->pcfg_command) {
- case NAL_CMD_GET_PEER: {
- ptl_nid_t nid = 0;
- __u32 ip = 0;
- int port = 0;
- int share_count = 0;
-
- rc = kranal_get_peer_info(pcfg->pcfg_count,
- &nid, &ip, &port, &share_count);
- pcfg->pcfg_nid = nid;
- pcfg->pcfg_size = 0;
- pcfg->pcfg_id = ip;
- pcfg->pcfg_misc = port;
- pcfg->pcfg_count = 0;
- pcfg->pcfg_wait = share_count;
- break;
- }
- case NAL_CMD_ADD_PEER: {
- rc = kranal_add_persistent_peer(pcfg->pcfg_nid,
- pcfg->pcfg_id, /* IP */
- pcfg->pcfg_misc); /* port */
- break;
- }
- case NAL_CMD_DEL_PEER: {
- rc = kranal_del_peer(pcfg->pcfg_nid,
- /* flags == single_share */
- pcfg->pcfg_flags != 0);
- break;
- }
- case NAL_CMD_GET_CONN: {
- kra_conn_t *conn = kranal_get_conn_by_idx(pcfg->pcfg_count);
-
- if (conn == NULL)
- rc = -ENOENT;
- else {
- rc = 0;
- pcfg->pcfg_nid = conn->rac_peer->rap_nid;
- pcfg->pcfg_id = 0;
- pcfg->pcfg_misc = 0;
- pcfg->pcfg_flags = 0;
- kranal_conn_decref(conn);
- }
- break;
- }
- case NAL_CMD_CLOSE_CONNECTION: {
- rc = kranal_close_matching_conns(pcfg->pcfg_nid);
- break;
- }
- case NAL_CMD_REGISTER_MYNID: {
- if (pcfg->pcfg_nid == PTL_NID_ANY)
- rc = -EINVAL;
- else
- rc = kranal_set_mynid(pcfg->pcfg_nid);
- break;
- }
- }
-
- return rc;
-}
-
-void
-kranal_free_txdescs(struct list_head *freelist)
-{
- kra_tx_t *tx;
-
- while (!list_empty(freelist)) {
- tx = list_entry(freelist->next, kra_tx_t, tx_list);
-
- list_del(&tx->tx_list);
- PORTAL_FREE(tx->tx_phys, PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
- PORTAL_FREE(tx, sizeof(*tx));
- }
-}
-
-int
-kranal_alloc_txdescs(struct list_head *freelist, int n)
-{
- int isnblk = (freelist == &kranal_data.kra_idle_nblk_txs);
- int i;
- kra_tx_t *tx;
-
- LASSERT (freelist == &kranal_data.kra_idle_txs ||
- freelist == &kranal_data.kra_idle_nblk_txs);
- LASSERT (list_empty(freelist));
-
- for (i = 0; i < n; i++) {
-
- PORTAL_ALLOC(tx, sizeof(*tx));
- if (tx == NULL) {
- CERROR("Can't allocate %stx[%d]\n",
- isnblk ? "nblk " : "", i);
- kranal_free_txdescs(freelist);
- return -ENOMEM;
- }
-
- PORTAL_ALLOC(tx->tx_phys,
- PTL_MD_MAX_IOV * sizeof(*tx->tx_phys));
- if (tx->tx_phys == NULL) {
- CERROR("Can't allocate %stx[%d]->tx_phys\n",
- isnblk ? "nblk " : "", i);
-
- PORTAL_FREE(tx, sizeof(*tx));
- kranal_free_txdescs(freelist);
- return -ENOMEM;
- }
-
- tx->tx_isnblk = isnblk;
- tx->tx_buftype = RANAL_BUF_NONE;
-
- list_add(&tx->tx_list, freelist);
- }
-
- return 0;
-}
-
-int
-kranal_device_init(int id, kra_device_t *dev)
-{
- const int total_ntx = RANAL_NTX + RANAL_NTX_NBLK;
- RAP_RETURN rrc;
-
- dev->rad_id = id;
- rrc = RapkGetDeviceByIndex(id, kranal_device_callback,
- &dev->rad_handle);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't get Rapidarray Device %d: %d\n", id, rrc);
- goto failed_0;
- }
-
- rrc = RapkReserveRdma(dev->rad_handle, total_ntx);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't reserve %d RDMA descriptors"
- " for device %d: %d\n", total_ntx, id, rrc);
- goto failed_1;
- }
-
- rrc = RapkCreatePtag(dev->rad_handle,
- &dev->rad_ptag);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't create ptag"
- " for device %d: %d\n", id, rrc);
- goto failed_1;
- }
-
- rrc = RapkCreateCQ(dev->rad_handle, total_ntx, dev->rad_ptag,
- &dev->rad_rdma_cq);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't create rdma cq size %d"
- " for device %d: %d\n", total_ntx, id, rrc);
- goto failed_2;
- }
-
- rrc = RapkCreateCQ(dev->rad_handle, RANAL_FMA_CQ_SIZE,
- dev->rad_ptag, &dev->rad_fma_cq);
- if (rrc != RAP_SUCCESS) {
- CERROR("Can't create fma cq size %d"
- " for device %d: %d\n", RANAL_FMA_CQ_SIZE, id, rrc);
- goto failed_3;
- }
-
- return 0;
-
- failed_3:
- RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cq, dev->rad_ptag);
- failed_2:
- RapkDestroyPtag(dev->rad_handle, dev->rad_ptag);
- failed_1:
- RapkReleaseDevice(dev->rad_handle);
- failed_0:
- return -ENODEV;
-}
-
-void
-kranal_device_fini(kra_device_t *dev)
-{
- RapkDestroyCQ(dev->rad_handle, dev->rad_fma_cq, dev->rad_ptag);
- RapkDestroyCQ(dev->rad_handle, dev->rad_rdma_cq, dev->rad_ptag);
- RapkDestroyPtag(dev->rad_handle, dev->rad_ptag);
- RapkReleaseDevice(dev->rad_handle);
-}
-
-void
-kranal_api_shutdown (nal_t *nal)
-{
- int i;
- int rc;
- unsigned long flags;
-
- if (nal->nal_refct != 0) {
- /* This module got the first ref */
- PORTAL_MODULE_UNUSE;
- return;
- }
-
- CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
- atomic_read(&portal_kmemory));
-
- LASSERT (nal == &kranal_api);
-
- switch (kranal_data.kra_init) {
- default:
- CERROR("Unexpected state %d\n", kranal_data.kra_init);
- LBUG();
-
- case RANAL_INIT_ALL:
- /* stop calls to nal_cmd */
- libcfs_nal_cmd_unregister(RANAL);
- /* No new persistent peers */
-
- /* resetting my NID to unadvertises me, removes my
- * listener and nukes all current peers */
- kranal_set_mynid(PTL_NID_ANY);
- /* no new peers or conns */
-
- /* Wait for all peer/conn state to clean up */
- i = 2;
- while (atomic_read(&kranal_data.kra_nconns) != 0 ||
- atomic_read(&kranal_data.kra_npeers) != 0) {
- i++;
- CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
- "waiting for %d peers and %d conns to close down\n",
- atomic_read(&kranal_data.kra_npeers),
- atomic_read(&kranal_data.kra_nconns));
- kranal_pause(HZ);
- }
- /* fall through */
-
- case RANAL_INIT_LIB:
- lib_fini(&kranal_lib);
- /* fall through */
-
- case RANAL_INIT_DATA:
- break;
- }
-
- /* flag threads to terminate; wake and wait for them to die */
- kranal_data.kra_shutdown = 1;
-
- for (i = 0; i < kranal_data.kra_ndevs; i++) {
- kra_device_t *dev = &kranal_data.kra_devices[i];
-
- LASSERT (list_empty(&dev->rad_connq));
-
- spin_lock_irqsave(&dev->rad_lock, flags);
- wake_up(&dev->rad_waitq);
- spin_unlock_irqrestore(&dev->rad_lock, flags);
- }
-
- spin_lock_irqsave(&kranal_data.kra_reaper_lock, flags);
- wake_up_all(&kranal_data.kra_reaper_waitq);
- spin_unlock_irqrestore(&kranal_data.kra_reaper_lock, flags);
-
- LASSERT (list_empty(&kranal_data.kra_connd_peers));
- spin_lock_irqsave(&kranal_data.kra_connd_lock, flags);
- wake_up_all(&kranal_data.kra_connd_waitq);
- spin_unlock_irqrestore(&kranal_data.kra_connd_lock, flags);
-
- i = 2;
- while (atomic_read(&kranal_data.kra_nthreads) != 0) {
- i++;
- CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
- "Waiting for %d threads to terminate\n",
- atomic_read(&kranal_data.kra_nthreads));
- kranal_pause(HZ);
- }
-
- LASSERT (atomic_read(&kranal_data.kra_npeers) == 0);
- if (kranal_data.kra_peers != NULL) {
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
- LASSERT (list_empty(&kranal_data.kra_peers[i]));
-
- PORTAL_FREE(kranal_data.kra_peers,
- sizeof (struct list_head) *
- kranal_data.kra_peer_hash_size);
- }
-
- LASSERT (atomic_read(&kranal_data.kra_nconns) == 0);
- if (kranal_data.kra_conns != NULL) {
- for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
- LASSERT (list_empty(&kranal_data.kra_conns[i]));
-
- PORTAL_FREE(kranal_data.kra_conns,
- sizeof (struct list_head) *
- kranal_data.kra_conn_hash_size);
- }
-
- for (i = 0; i < kranal_data.kra_ndevs; i++)
- kranal_device_fini(&kranal_data.kra_devices[i]);
-
- kranal_free_txdescs(&kranal_data.kra_idle_txs);
- kranal_free_txdescs(&kranal_data.kra_idle_nblk_txs);
-
- CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
- atomic_read(&portal_kmemory));
- printk(KERN_INFO "Lustre: RapidArray NAL unloaded (final mem %d)\n",
- atomic_read(&portal_kmemory));
-
- kranal_data.kra_init = RANAL_INIT_NOTHING;
-}
-
-int
-kranal_api_startup (nal_t *nal, ptl_pid_t requested_pid,
- ptl_ni_limits_t *requested_limits,
- ptl_ni_limits_t *actual_limits)
-{
- static int device_ids[] = {RAPK_MAIN_DEVICE_ID,
- RAPK_EXPANSION_DEVICE_ID};
- struct timeval tv;
- ptl_process_id_t process_id;
- int pkmem = atomic_read(&portal_kmemory);
- int rc;
- int i;
- kra_device_t *dev;
-
- LASSERT (nal == &kranal_api);
-
- if (nal->nal_refct != 0) {
- if (actual_limits != NULL)
- *actual_limits = kranal_lib.libnal_ni.ni_actual_limits;
- /* This module got the first ref */
- PORTAL_MODULE_USE;
- return PTL_OK;
- }
-
- LASSERT (kranal_data.kra_init == RANAL_INIT_NOTHING);
-
- memset(&kranal_data, 0, sizeof(kranal_data)); /* zero pointers, flags etc */
-
- /* CAVEAT EMPTOR: Every 'Fma' message includes the sender's NID and
- * a unique (for all time) incarnation so we can uniquely identify
- * the sender. The incarnation is an incrementing counter
- * initialised with seconds + microseconds at startup time. So we
- * rely on NOT creating connections more frequently on average than
- * 1MHz to ensure we don't use old incarnations when we reboot. */
- do_gettimeofday(&tv);
- kranal_data.kra_next_incarnation = (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
-
- init_MUTEX(&kranal_data.kra_nid_mutex);
- init_MUTEX_LOCKED(&kranal_data.kra_listener_signal);
-
- rwlock_init(&kranal_data.kra_global_lock);
-
- for (i = 0; i < RANAL_MAXDEVS; i++ ) {
- kra_device_t *dev = &kranal_data.kra_devices[i];
-
- dev->rad_idx = i;
- INIT_LIST_HEAD(&dev->rad_connq);
- init_waitqueue_head(&dev->rad_waitq);
- spin_lock_init(&dev->rad_lock);
- }
-
- init_waitqueue_head(&kranal_data.kra_reaper_waitq);
- spin_lock_init(&kranal_data.kra_reaper_lock);
-
- INIT_LIST_HEAD(&kranal_data.kra_connd_peers);
- init_waitqueue_head(&kranal_data.kra_connd_waitq);
- spin_lock_init(&kranal_data.kra_connd_lock);
-
- INIT_LIST_HEAD(&kranal_data.kra_idle_txs);
- INIT_LIST_HEAD(&kranal_data.kra_idle_nblk_txs);
- init_waitqueue_head(&kranal_data.kra_idle_tx_waitq);
- spin_lock_init(&kranal_data.kra_tx_lock);
-
- /* OK to call kranal_api_shutdown() to cleanup now */
- kranal_data.kra_init = RANAL_INIT_DATA;
-
- kranal_data.kra_peer_hash_size = RANAL_PEER_HASH_SIZE;
- PORTAL_ALLOC(kranal_data.kra_peers,
- sizeof(struct list_head) * kranal_data.kra_peer_hash_size);
- if (kranal_data.kra_peers == NULL)
- goto failed;
-
- for (i = 0; i < kranal_data.kra_peer_hash_size; i++)
- INIT_LIST_HEAD(&kranal_data.kra_peers[i]);
-
- kranal_data.kra_conn_hash_size = RANAL_PEER_HASH_SIZE;
- PORTAL_ALLOC(kranal_data.kra_conns,
- sizeof(struct list_head) * kranal_data.kra_conn_hash_size);
- if (kranal_data.kra_conns == NULL)
- goto failed;
-
- for (i = 0; i < kranal_data.kra_conn_hash_size; i++)
- INIT_LIST_HEAD(&kranal_data.kra_conns[i]);
-
- rc = kranal_alloc_txdescs(&kranal_data.kra_idle_txs, RANAL_NTX);
- if (rc != 0)
- goto failed;
-
- rc = kranal_alloc_txdescs(&kranal_data.kra_idle_nblk_txs,RANAL_NTX_NBLK);
- if (rc != 0)
- goto failed;
-
- process_id.pid = requested_pid;
- process_id.nid = PTL_NID_ANY; /* don't know my NID yet */
-
- rc = lib_init(&kranal_lib, nal, process_id,
- requested_limits, actual_limits);
- if (rc != PTL_OK) {
- CERROR("lib_init failed: error %d\n", rc);
- goto failed;
- }
-
- /* lib interface initialised */
- kranal_data.kra_init = RANAL_INIT_LIB;
- /*****************************************************/
-
- rc = kranal_thread_start(kranal_reaper, NULL);
- if (rc != 0) {
- CERROR("Can't spawn ranal reaper: %d\n", rc);
- goto failed;
- }
-
- for (i = 0; i < RANAL_N_CONND; i++) {
- rc = kranal_thread_start(kranal_connd, (void *)i);
- if (rc != 0) {
- CERROR("Can't spawn ranal connd[%d]: %d\n",
- i, rc);
- goto failed;
- }
- }
-
- LASSERT(kranal_data.kra_ndevs == 0);
- for (i = 0; i < sizeof(device_ids)/sizeof(device_ids[0]); i++) {
- dev = &kranal_data.kra_devices[kranal_data.kra_ndevs];
-
- rc = kranal_device_init(device_ids[i], dev);
- if (rc == 0)
- kranal_data.kra_ndevs++;
-
- rc = kranal_thread_start(kranal_scheduler, dev);
- if (rc != 0) {
- CERROR("Can't spawn ranal scheduler[%d]: %d\n",
- i, rc);
- goto failed;
- }
- }
-
- if (kranal_data.kra_ndevs == 0)
- goto failed;
-
- rc = libcfs_nal_cmd_register(RANAL, &kranal_cmd, NULL);
- if (rc != 0) {
- CERROR("Can't initialise command interface (rc = %d)\n", rc);
- goto failed;
- }
-
- /* flag everything initialised */
- kranal_data.kra_init = RANAL_INIT_ALL;
- /*****************************************************/
-
- CDEBUG(D_MALLOC, "initial kmem %d\n", atomic_read(&portal_kmemory));
- printk(KERN_INFO "Lustre: RapidArray NAL loaded "
- "(initial mem %d)\n", pkmem);
-
- return PTL_OK;
-
- failed:
- kranal_api_shutdown(&kranal_api);
- return PTL_FAIL;
-}
-
-void __exit
-kranal_module_fini (void)
-{
-#ifdef CONFIG_SYSCTL
- if (kranal_tunables.kra_sysctl != NULL)
- unregister_sysctl_table(kranal_tunables.kra_sysctl);
-#endif
- PtlNIFini(kranal_ni);
-
- ptl_unregister_nal(RANAL);
-}
-
-int __init
-kranal_module_init (void)
-{
- int rc;
-
- /* the following must be sizeof(int) for
- * proc_dointvec/kranal_listener_procint() */
- LASSERT (sizeof(kranal_tunables.kra_timeout) == sizeof(int));
- LASSERT (sizeof(kranal_tunables.kra_listener_timeout) == sizeof(int));
- LASSERT (sizeof(kranal_tunables.kra_backlog) == sizeof(int));
- LASSERT (sizeof(kranal_tunables.kra_port) == sizeof(int));
- LASSERT (sizeof(kranal_tunables.kra_max_immediate) == sizeof(int));
-
- kranal_api.nal_ni_init = kranal_api_startup;
- kranal_api.nal_ni_fini = kranal_api_shutdown;
-
- /* Initialise dynamic tunables to defaults once only */
- kranal_tunables.kra_timeout = RANAL_TIMEOUT;
-
- rc = ptl_register_nal(RANAL, &kranal_api);
- if (rc != PTL_OK) {
- CERROR("Can't register RANAL: %d\n", rc);
- return -ENOMEM; /* or something... */
- }
-
- /* Pure gateways want the NAL started up at module load time... */
- rc = PtlNIInit(RANAL, LUSTRE_SRV_PTL_PID, NULL, NULL, &kranal_ni);
- if (rc != PTL_OK && rc != PTL_IFACE_DUP) {
- ptl_unregister_nal(RANAL);
- return -ENODEV;
- }
-
-#ifdef CONFIG_SYSCTL
- /* Press on regardless even if registering sysctl doesn't work */
- kranal_tunables.kra_sysctl =
- register_sysctl_table(kranal_top_ctl_table, 0);
-#endif
- return 0;
-}
-
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Kernel RapidArray NAL v0.01");
-MODULE_LICENSE("GPL");
-
-module_init(kranal_module_init);
-module_exit(kranal_module_fini);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff