* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include "socknal.h"
-
-ptl_handle_ni_t ksocknal_ni;
-static nal_t ksocknal_api;
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
-ksock_nal_data_t ksocknal_data;
-#else
-static ksock_nal_data_t ksocknal_data;
-#endif
-
-kpr_nal_interface_t ksocknal_router_interface = {
- kprni_nalid: SOCKNAL,
- kprni_arg: &ksocknal_data,
- kprni_fwd: ksocknal_fwd_packet,
+#include "socklnd.h"
+
+lnd_t the_ksocklnd = {
+ .lnd_type = SOCKLND,
+ .lnd_startup = ksocknal_startup,
+ .lnd_shutdown = ksocknal_shutdown,
+ .lnd_ctl = ksocknal_ctl,
+ .lnd_send = ksocknal_send,
+ .lnd_recv = ksocknal_recv,
+ .lnd_notify = ksocknal_notify,
+ .lnd_accept = ksocknal_accept,
};
+ksock_nal_data_t ksocknal_data;
-int
-ksocknal_api_forward(nal_t *nal, int id, void *args, size_t args_len,
- void *ret, size_t ret_len)
+ksock_interface_t *
+ksocknal_ip2iface(lnet_ni_t *ni, __u32 ip)
+{
+ ksock_net_t *net = ni->ni_data;
+ int i;
+ ksock_interface_t *iface;
+
+ for (i = 0; i < net->ksnn_ninterfaces; i++) {
+ LASSERT(i < LNET_MAX_INTERFACES);
+ iface = &net->ksnn_interfaces[i];
+
+ if (iface->ksni_ipaddr == ip)
+ return (iface);
+ }
+
+ return (NULL);
+}
+
+ksock_route_t *
+ksocknal_create_route (__u32 ipaddr, int port)
+{
+ ksock_route_t *route;
+
+ LIBCFS_ALLOC (route, sizeof (*route));
+ if (route == NULL)
+ return (NULL);
+
+ atomic_set (&route->ksnr_refcount, 1);
+ route->ksnr_peer = NULL;
+ route->ksnr_retry_interval = 0; /* OK to connect at any time */
+ route->ksnr_ipaddr = ipaddr;
+ route->ksnr_port = port;
+ route->ksnr_scheduled = 0;
+ route->ksnr_connecting = 0;
+ route->ksnr_connected = 0;
+ route->ksnr_deleted = 0;
+ route->ksnr_conn_count = 0;
+ route->ksnr_share_count = 0;
+ route->ksnr_proto = &ksocknal_protocol_v2x;
+
+ return (route);
+}
+
+void
+ksocknal_destroy_route (ksock_route_t *route)
{
- ksock_nal_data_t *k;
- nal_cb_t *nal_cb;
+ LASSERT (atomic_read(&route->ksnr_refcount) == 0);
- k = nal->nal_data;
- nal_cb = k->ksnd_nal_cb;
+ if (route->ksnr_peer != NULL)
+ ksocknal_peer_decref(route->ksnr_peer);
- lib_dispatch(nal_cb, k, id, args, ret); /* ksocknal_send needs k */
- return PTL_OK;
+ LIBCFS_FREE (route, sizeof (*route));
}
int
-ksocknal_api_shutdown(nal_t *nal, int ni)
+ksocknal_create_peer (ksock_peer_t **peerp, lnet_ni_t *ni, lnet_process_id_t id)
{
- CDEBUG (D_NET, "closing all connections\n");
+ ksock_net_t *net = ni->ni_data;
+ ksock_peer_t *peer;
+
+ LASSERT (id.nid != LNET_NID_ANY);
+ LASSERT (id.pid != LNET_PID_ANY);
+ LASSERT (!in_interrupt());
+
+ LIBCFS_ALLOC (peer, sizeof (*peer));
+ if (peer == NULL)
+ return -ENOMEM;
+
+ memset (peer, 0, sizeof (*peer)); /* NULL pointers/clear flags etc */
+
+ peer->ksnp_ni = ni;
+ peer->ksnp_id = id;
+ atomic_set (&peer->ksnp_refcount, 1); /* 1 ref for caller */
+ peer->ksnp_closing = 0;
+ peer->ksnp_accepting = 0;
+ peer->ksnp_zc_next_cookie = 1;
+ CFS_INIT_LIST_HEAD (&peer->ksnp_conns);
+ CFS_INIT_LIST_HEAD (&peer->ksnp_routes);
+ CFS_INIT_LIST_HEAD (&peer->ksnp_tx_queue);
+ CFS_INIT_LIST_HEAD (&peer->ksnp_zc_req_list);
+ spin_lock_init(&peer->ksnp_lock);
+
+ spin_lock_bh (&net->ksnn_lock);
- return ksocknal_close_sock(0); /* close all sockets */
+ if (net->ksnn_shutdown) {
+ spin_unlock_bh (&net->ksnn_lock);
+
+ LIBCFS_FREE(peer, sizeof(*peer));
+ CERROR("Can't create peer: network shutdown\n");
+ return -ESHUTDOWN;
+ }
+
+ net->ksnn_npeers++;
+
+ spin_unlock_bh (&net->ksnn_lock);
+
+ *peerp = peer;
+ return 0;
}
void
-ksocknal_api_yield(nal_t *nal)
+ksocknal_destroy_peer (ksock_peer_t *peer)
{
- our_cond_resched();
- return;
+ ksock_net_t *net = peer->ksnp_ni->ni_data;
+
+ CDEBUG (D_NET, "peer %s %p deleted\n",
+ libcfs_id2str(peer->ksnp_id), peer);
+
+ LASSERT (atomic_read (&peer->ksnp_refcount) == 0);
+ LASSERT (peer->ksnp_accepting == 0);
+ LASSERT (list_empty (&peer->ksnp_conns));
+ LASSERT (list_empty (&peer->ksnp_routes));
+ LASSERT (list_empty (&peer->ksnp_tx_queue));
+ LASSERT (list_empty (&peer->ksnp_zc_req_list));
+
+ LIBCFS_FREE (peer, sizeof (*peer));
+
+ /* NB a peer's connections and routes 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. */
+ spin_lock_bh (&net->ksnn_lock);
+ net->ksnn_npeers--;
+ spin_unlock_bh (&net->ksnn_lock);
}
-void
-ksocknal_api_lock(nal_t *nal, unsigned long *flags)
+ksock_peer_t *
+ksocknal_find_peer_locked (lnet_ni_t *ni, lnet_process_id_t id)
{
- ksock_nal_data_t *k;
- nal_cb_t *nal_cb;
+ struct list_head *peer_list = ksocknal_nid2peerlist(id.nid);
+ struct list_head *tmp;
+ ksock_peer_t *peer;
+
+ list_for_each (tmp, peer_list) {
+
+ peer = list_entry (tmp, ksock_peer_t, ksnp_list);
+
+ LASSERT (!peer->ksnp_closing);
+
+ if (peer->ksnp_ni != ni)
+ continue;
- k = nal->nal_data;
- nal_cb = k->ksnd_nal_cb;
- nal_cb->cb_cli(nal_cb,flags);
+ if (peer->ksnp_id.nid != id.nid ||
+ peer->ksnp_id.pid != id.pid)
+ continue;
+
+ CDEBUG(D_NET, "got peer [%p] -> %s (%d)\n",
+ peer, libcfs_id2str(id),
+ atomic_read(&peer->ksnp_refcount));
+ return (peer);
+ }
+ return (NULL);
+}
+
+ksock_peer_t *
+ksocknal_find_peer (lnet_ni_t *ni, lnet_process_id_t id)
+{
+ ksock_peer_t *peer;
+
+ read_lock (&ksocknal_data.ksnd_global_lock);
+ peer = ksocknal_find_peer_locked (ni, id);
+ if (peer != NULL) /* +1 ref for caller? */
+ ksocknal_peer_addref(peer);
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+
+ return (peer);
}
void
-ksocknal_api_unlock(nal_t *nal, unsigned long *flags)
+ksocknal_unlink_peer_locked (ksock_peer_t *peer)
{
- ksock_nal_data_t *k;
- nal_cb_t *nal_cb;
+ int i;
+ __u32 ip;
+
+ for (i = 0; i < peer->ksnp_n_passive_ips; i++) {
+ LASSERT (i < LNET_MAX_INTERFACES);
+ ip = peer->ksnp_passive_ips[i];
- k = nal->nal_data;
- nal_cb = k->ksnd_nal_cb;
- nal_cb->cb_sti(nal_cb,flags);
+ ksocknal_ip2iface(peer->ksnp_ni, ip)->ksni_npeers--;
+ }
+
+ LASSERT (list_empty(&peer->ksnp_conns));
+ LASSERT (list_empty(&peer->ksnp_routes));
+ LASSERT (!peer->ksnp_closing);
+ peer->ksnp_closing = 1;
+ list_del (&peer->ksnp_list);
+ /* lose peerlist's ref */
+ ksocknal_peer_decref(peer);
}
-nal_t *
-ksocknal_init(int interface, ptl_pt_index_t ptl_size,
- ptl_ac_index_t ac_size, ptl_pid_t requested_pid)
+int
+ksocknal_get_peer_info (lnet_ni_t *ni, int index,
+ lnet_process_id_t *id, __u32 *myip, __u32 *peer_ip, int *port,
+ int *conn_count, int *share_count)
{
- CDEBUG(D_NET, "calling lib_init with nid "LPX64"\n", (ptl_nid_t)0);
- lib_init(&ksocknal_lib, (ptl_nid_t)0, 0, 10, ptl_size, ac_size);
- return (&ksocknal_api);
+ ksock_peer_t *peer;
+ struct list_head *ptmp;
+ ksock_route_t *route;
+ struct list_head *rtmp;
+ int i;
+ int j;
+ int rc = -ENOENT;
+
+ read_lock (&ksocknal_data.ksnd_global_lock);
+
+ for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
+
+ list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
+ peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
+
+ if (peer->ksnp_ni != ni)
+ continue;
+
+ if (peer->ksnp_n_passive_ips == 0 &&
+ list_empty(&peer->ksnp_routes)) {
+ if (index-- > 0)
+ continue;
+
+ *id = peer->ksnp_id;
+ *myip = 0;
+ *peer_ip = 0;
+ *port = 0;
+ *conn_count = 0;
+ *share_count = 0;
+ rc = 0;
+ goto out;
+ }
+
+ for (j = 0; j < peer->ksnp_n_passive_ips; j++) {
+ if (index-- > 0)
+ continue;
+
+ *id = peer->ksnp_id;
+ *myip = peer->ksnp_passive_ips[j];
+ *peer_ip = 0;
+ *port = 0;
+ *conn_count = 0;
+ *share_count = 0;
+ rc = 0;
+ goto out;
+ }
+
+ list_for_each (rtmp, &peer->ksnp_routes) {
+ if (index-- > 0)
+ continue;
+
+ route = list_entry(rtmp, ksock_route_t,
+ ksnr_list);
+
+ *id = peer->ksnp_id;
+ *myip = route->ksnr_myipaddr;
+ *peer_ip = route->ksnr_ipaddr;
+ *port = route->ksnr_port;
+ *conn_count = route->ksnr_conn_count;
+ *share_count = route->ksnr_share_count;
+ rc = 0;
+ goto out;
+ }
+ }
+ }
+ out:
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ return (rc);
}
-/*
- * EXTRA functions follow
- */
+void
+ksocknal_associate_route_conn_locked(ksock_route_t *route, ksock_conn_t *conn)
+{
+ ksock_peer_t *peer = route->ksnr_peer;
+ int type = conn->ksnc_type;
+ ksock_interface_t *iface;
+
+ conn->ksnc_route = route;
+ ksocknal_route_addref(route);
+
+ if (route->ksnr_myipaddr != conn->ksnc_myipaddr) {
+ if (route->ksnr_myipaddr == 0) {
+ /* route wasn't bound locally yet (the initial route) */
+ CDEBUG(D_NET, "Binding %s %u.%u.%u.%u to %u.%u.%u.%u\n",
+ libcfs_id2str(peer->ksnp_id),
+ HIPQUAD(route->ksnr_ipaddr),
+ HIPQUAD(conn->ksnc_myipaddr));
+ } else {
+ CDEBUG(D_NET, "Rebinding %s %u.%u.%u.%u from "
+ "%u.%u.%u.%u to %u.%u.%u.%u\n",
+ libcfs_id2str(peer->ksnp_id),
+ HIPQUAD(route->ksnr_ipaddr),
+ HIPQUAD(route->ksnr_myipaddr),
+ HIPQUAD(conn->ksnc_myipaddr));
+
+ iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
+ route->ksnr_myipaddr);
+ if (iface != NULL)
+ iface->ksni_nroutes--;
+ }
+ route->ksnr_myipaddr = conn->ksnc_myipaddr;
+ iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
+ route->ksnr_myipaddr);
+ if (iface != NULL)
+ iface->ksni_nroutes++;
+ }
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#define SOCKET_I(inode) (&(inode)->u.socket_i)
-#endif
-static __inline__ struct socket *
-socki_lookup(struct inode *inode)
+ route->ksnr_connected |= (1<<type);
+ route->ksnr_conn_count++;
+
+ /* Successful connection => further attempts can
+ * proceed immediately */
+ route->ksnr_retry_interval = 0;
+}
+
+void
+ksocknal_add_route_locked (ksock_peer_t *peer, ksock_route_t *route)
{
- return SOCKET_I(inode);
+ struct list_head *tmp;
+ ksock_conn_t *conn;
+ ksock_route_t *route2;
+
+ LASSERT (!peer->ksnp_closing);
+ LASSERT (route->ksnr_peer == NULL);
+ LASSERT (!route->ksnr_scheduled);
+ LASSERT (!route->ksnr_connecting);
+ LASSERT (route->ksnr_connected == 0);
+
+ /* LASSERT(unique) */
+ list_for_each(tmp, &peer->ksnp_routes) {
+ route2 = list_entry(tmp, ksock_route_t, ksnr_list);
+
+ if (route2->ksnr_ipaddr == route->ksnr_ipaddr) {
+ CERROR ("Duplicate route %s %u.%u.%u.%u\n",
+ libcfs_id2str(peer->ksnp_id),
+ HIPQUAD(route->ksnr_ipaddr));
+ LBUG();
+ }
+ }
+
+ route->ksnr_peer = peer;
+ ksocknal_peer_addref(peer);
+ /* peer's routelist takes over my ref on 'route' */
+ list_add_tail(&route->ksnr_list, &peer->ksnp_routes);
+
+ list_for_each(tmp, &peer->ksnp_conns) {
+ conn = list_entry(tmp, ksock_conn_t, ksnc_list);
+
+ if (conn->ksnc_ipaddr != route->ksnr_ipaddr)
+ continue;
+
+ ksocknal_associate_route_conn_locked(route, conn);
+ /* keep going (typed routes) */
+ }
+}
+
+void
+ksocknal_del_route_locked (ksock_route_t *route)
+{
+ ksock_peer_t *peer = route->ksnr_peer;
+ ksock_interface_t *iface;
+ ksock_conn_t *conn;
+ struct list_head *ctmp;
+ struct list_head *cnxt;
+
+ LASSERT (!route->ksnr_deleted);
+
+ /* Close associated conns */
+ list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
+ conn = list_entry(ctmp, ksock_conn_t, ksnc_list);
+
+ if (conn->ksnc_route != route)
+ continue;
+
+ ksocknal_close_conn_locked (conn, 0);
+ }
+
+ if (route->ksnr_myipaddr != 0) {
+ iface = ksocknal_ip2iface(route->ksnr_peer->ksnp_ni,
+ route->ksnr_myipaddr);
+ if (iface != NULL)
+ iface->ksni_nroutes--;
+ }
+
+ route->ksnr_deleted = 1;
+ list_del (&route->ksnr_list);
+ ksocknal_route_decref(route); /* drop peer's ref */
+
+ if (list_empty (&peer->ksnp_routes) &&
+ list_empty (&peer->ksnp_conns)) {
+ /* I've just removed the last route to a peer with no active
+ * connections */
+ ksocknal_unlink_peer_locked (peer);
+ }
}
int
-ksocknal_set_mynid(ptl_nid_t nid)
+ksocknal_add_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ipaddr, int port)
{
- lib_ni_t *ni = &ksocknal_lib.ni;
+ struct list_head *tmp;
+ ksock_peer_t *peer;
+ ksock_peer_t *peer2;
+ ksock_route_t *route;
+ ksock_route_t *route2;
+ int rc;
+
+ if (id.nid == LNET_NID_ANY ||
+ id.pid == LNET_PID_ANY)
+ return (-EINVAL);
+
+ /* Have a brand new peer ready... */
+ rc = ksocknal_create_peer(&peer, ni, id);
+ if (rc != 0)
+ return rc;
+
+ route = ksocknal_create_route (ipaddr, port);
+ if (route == NULL) {
+ ksocknal_peer_decref(peer);
+ return (-ENOMEM);
+ }
+
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
+
+ peer2 = ksocknal_find_peer_locked (ni, id);
+ if (peer2 != NULL) {
+ ksocknal_peer_decref(peer);
+ peer = peer2;
+ } else {
+ /* peer table takes my ref on peer */
+ list_add_tail (&peer->ksnp_list,
+ ksocknal_nid2peerlist (id.nid));
+ }
+
+ route2 = NULL;
+ list_for_each (tmp, &peer->ksnp_routes) {
+ route2 = list_entry(tmp, ksock_route_t, ksnr_list);
- /* FIXME: we have to do this because we call lib_init() at module
- * insertion time, which is before we have 'mynid' available. lib_init
- * sets the NAL's nid, which it uses to tell other nodes where packets
- * are coming from. This is not a very graceful solution to this
- * problem. */
+ if (route2->ksnr_ipaddr == ipaddr)
+ break;
+
+ route2 = NULL;
+ }
+ if (route2 == NULL) {
+ ksocknal_add_route_locked(peer, route);
+ route->ksnr_share_count++;
+ } else {
+ ksocknal_route_decref(route);
+ route2->ksnr_share_count++;
+ }
- CDEBUG(D_IOCTL, "setting mynid to "LPX64" (old nid="LPX64")\n",
- nid, ni->nid);
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
- ni->nid = nid;
return (0);
}
void
-ksocknal_bind_irq (unsigned int irq, int cpu)
+ksocknal_del_peer_locked (ksock_peer_t *peer, __u32 ip)
{
-#if (defined(CONFIG_SMP) && CPU_AFFINITY)
- char cmdline[64];
- char *argv[] = {"/bin/sh",
- "-c",
- cmdline,
- NULL};
- char *envp[] = {"HOME=/",
- "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
- NULL};
+ ksock_conn_t *conn;
+ ksock_route_t *route;
+ struct list_head *tmp;
+ struct list_head *nxt;
+ int nshared;
- snprintf (cmdline, sizeof (cmdline),
- "echo %d > /proc/irq/%u/smp_affinity", 1 << cpu, irq);
+ LASSERT (!peer->ksnp_closing);
- printk (KERN_INFO "Binding irq %u to CPU %d with cmd: %s\n",
- irq, cpu, cmdline);
+ /* Extra ref prevents peer disappearing until I'm done with it */
+ ksocknal_peer_addref(peer);
- /* FIXME: Find a better method of setting IRQ affinity...
- */
+ list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
+ route = list_entry(tmp, ksock_route_t, ksnr_list);
- call_usermodehelper (argv[0], argv, envp);
-#endif
+ /* no match */
+ if (!(ip == 0 || route->ksnr_ipaddr == ip))
+ continue;
+
+ route->ksnr_share_count = 0;
+ /* This deletes associated conns too */
+ ksocknal_del_route_locked (route);
+ }
+
+ nshared = 0;
+ list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
+ route = list_entry(tmp, ksock_route_t, ksnr_list);
+ nshared += route->ksnr_share_count;
+ }
+
+ if (nshared == 0) {
+ /* remove everything else if there are no explicit entries
+ * left */
+
+ list_for_each_safe (tmp, nxt, &peer->ksnp_routes) {
+ route = list_entry(tmp, ksock_route_t, ksnr_list);
+
+ /* we should only be removing auto-entries */
+ LASSERT(route->ksnr_share_count == 0);
+ ksocknal_del_route_locked (route);
+ }
+
+ list_for_each_safe (tmp, nxt, &peer->ksnp_conns) {
+ conn = list_entry(tmp, ksock_conn_t, ksnc_list);
+
+ ksocknal_close_conn_locked(conn, 0);
+ }
+ }
+
+ ksocknal_peer_decref(peer);
+ /* NB peer unlinks itself when last conn/route is removed */
}
int
-ksocknal_add_sock (ptl_nid_t nid, int fd, int bind_irq)
+ksocknal_del_peer (lnet_ni_t *ni, lnet_process_id_t id, __u32 ip)
{
- unsigned long flags;
+ CFS_LIST_HEAD (zombies);
+ struct list_head *ptmp;
+ struct list_head *pnxt;
+ ksock_peer_t *peer;
+ int lo;
+ int hi;
+ int i;
+ int rc = -ENOENT;
+
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
+
+ if (id.nid != LNET_NID_ANY)
+ lo = hi = ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers;
+ else {
+ lo = 0;
+ hi = ksocknal_data.ksnd_peer_hash_size - 1;
+ }
+
+ for (i = lo; i <= hi; i++) {
+ list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
+ peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
+
+ if (peer->ksnp_ni != ni)
+ continue;
+
+ if (!((id.nid == LNET_NID_ANY || peer->ksnp_id.nid == id.nid) &&
+ (id.pid == LNET_PID_ANY || peer->ksnp_id.pid == id.pid)))
+ continue;
+
+ ksocknal_peer_addref(peer); /* a ref for me... */
+
+ ksocknal_del_peer_locked (peer, ip);
+
+ if (peer->ksnp_closing && !list_empty(&peer->ksnp_tx_queue)) {
+ LASSERT (list_empty(&peer->ksnp_conns));
+ LASSERT (list_empty(&peer->ksnp_routes));
+
+ list_splice_init(&peer->ksnp_tx_queue, &zombies);
+ }
+
+ ksocknal_peer_decref(peer); /* ...till here */
+
+ rc = 0; /* matched! */
+ }
+ }
+
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+
+ ksocknal_txlist_done(ni, &zombies, 1);
+
+ return (rc);
+}
+
+ksock_conn_t *
+ksocknal_get_conn_by_idx (lnet_ni_t *ni, int index)
+{
+ ksock_peer_t *peer;
+ struct list_head *ptmp;
ksock_conn_t *conn;
- struct file *file = NULL;
- struct socket *sock = NULL;
- ksock_sched_t *sched = NULL;
- unsigned int irq = 0;
- struct net_device *dev = NULL;
- int ret;
- int idx;
- ENTRY;
+ struct list_head *ctmp;
+ int i;
- LASSERT (!in_interrupt());
+ read_lock (&ksocknal_data.ksnd_global_lock);
+
+ for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
+ list_for_each (ptmp, &ksocknal_data.ksnd_peers[i]) {
+ peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
+
+ LASSERT (!peer->ksnp_closing);
+
+ if (peer->ksnp_ni != ni)
+ continue;
+
+ list_for_each (ctmp, &peer->ksnp_conns) {
+ if (index-- > 0)
+ continue;
+
+ conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
+ ksocknal_conn_addref(conn);
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ return (conn);
+ }
+ }
+ }
+
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ return (NULL);
+}
+
+ksock_sched_t *
+ksocknal_choose_scheduler_locked (unsigned int irq)
+{
+ ksock_sched_t *sched;
+ ksock_irqinfo_t *info;
+ int i;
+
+ LASSERT (irq < NR_IRQS);
+ info = &ksocknal_data.ksnd_irqinfo[irq];
+
+ if (irq != 0 && /* hardware NIC */
+ info->ksni_valid) { /* already set up */
+ return (&ksocknal_data.ksnd_schedulers[info->ksni_sched]);
+ }
+
+ /* software NIC (irq == 0) || not associated with a scheduler yet.
+ * Choose the CPU with the fewest connections... */
+ sched = &ksocknal_data.ksnd_schedulers[0];
+ for (i = 1; i < ksocknal_data.ksnd_nschedulers; i++)
+ if (sched->kss_nconns >
+ ksocknal_data.ksnd_schedulers[i].kss_nconns)
+ sched = &ksocknal_data.ksnd_schedulers[i];
+
+ if (irq != 0) { /* Hardware NIC */
+ info->ksni_valid = 1;
+ info->ksni_sched = sched - ksocknal_data.ksnd_schedulers;
+
+ /* no overflow... */
+ LASSERT (info->ksni_sched == sched - ksocknal_data.ksnd_schedulers);
+ }
+
+ return (sched);
+}
- file = fget(fd);
- if (file == NULL)
- RETURN(-EINVAL);
+int
+ksocknal_local_ipvec (lnet_ni_t *ni, __u32 *ipaddrs)
+{
+ ksock_net_t *net = ni->ni_data;
+ int i;
+ int nip;
+
+ read_lock (&ksocknal_data.ksnd_global_lock);
+
+ nip = net->ksnn_ninterfaces;
+ LASSERT (nip < LNET_MAX_INTERFACES);
+
+ /* Only offer interfaces for additional connections if I have
+ * more than one. */
+ if (nip < 2) {
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ return 0;
+ }
+
+ for (i = 0; i < nip; i++) {
+ ipaddrs[i] = net->ksnn_interfaces[i].ksni_ipaddr;
+ LASSERT (ipaddrs[i] != 0);
+ }
+
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ return (nip);
+}
+
+int
+ksocknal_match_peerip (ksock_interface_t *iface, __u32 *ips, int nips)
+{
+ int best_netmatch = 0;
+ int best_xor = 0;
+ int best = -1;
+ int this_xor;
+ int this_netmatch;
+ int i;
+
+ for (i = 0; i < nips; i++) {
+ if (ips[i] == 0)
+ continue;
+
+ this_xor = (ips[i] ^ iface->ksni_ipaddr);
+ this_netmatch = ((this_xor & iface->ksni_netmask) == 0) ? 1 : 0;
+
+ if (!(best < 0 ||
+ best_netmatch < this_netmatch ||
+ (best_netmatch == this_netmatch &&
+ best_xor > this_xor)))
+ continue;
+
+ best = i;
+ best_netmatch = this_netmatch;
+ best_xor = this_xor;
+ }
+
+ LASSERT (best >= 0);
+ return (best);
+}
+
+int
+ksocknal_select_ips(ksock_peer_t *peer, __u32 *peerips, int n_peerips)
+{
+ rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
+ ksock_net_t *net = peer->ksnp_ni->ni_data;
+ ksock_interface_t *iface;
+ ksock_interface_t *best_iface;
+ int n_ips;
+ int i;
+ int j;
+ int k;
+ __u32 ip;
+ __u32 xor;
+ int this_netmatch;
+ int best_netmatch;
+ int best_npeers;
+
+ /* CAVEAT EMPTOR: We do all our interface matching with an
+ * exclusive hold of global lock at IRQ priority. We're only
+ * expecting to be dealing with small numbers of interfaces, so the
+ * O(n**3)-ness shouldn't matter */
+
+ /* Also note that I'm not going to return more than n_peerips
+ * interfaces, even if I have more myself */
+
+ write_lock_bh (global_lock);
+
+ LASSERT (n_peerips <= LNET_MAX_INTERFACES);
+ LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
+
+ /* Only match interfaces for additional connections
+ * if I have > 1 interface */
+ n_ips = (net->ksnn_ninterfaces < 2) ? 0 :
+ MIN(n_peerips, net->ksnn_ninterfaces);
+
+ for (i = 0; peer->ksnp_n_passive_ips < n_ips; i++) {
+ /* ^ yes really... */
+
+ /* If we have any new interfaces, first tick off all the
+ * peer IPs that match old interfaces, then choose new
+ * interfaces to match the remaining peer IPS.
+ * We don't forget interfaces we've stopped using; we might
+ * start using them again... */
+
+ if (i < peer->ksnp_n_passive_ips) {
+ /* Old interface. */
+ ip = peer->ksnp_passive_ips[i];
+ best_iface = ksocknal_ip2iface(peer->ksnp_ni, ip);
+
+ /* peer passive ips are kept up to date */
+ LASSERT(best_iface != NULL);
+ } else {
+ /* choose a new interface */
+ LASSERT (i == peer->ksnp_n_passive_ips);
+
+ best_iface = NULL;
+ best_netmatch = 0;
+ best_npeers = 0;
+
+ for (j = 0; j < net->ksnn_ninterfaces; j++) {
+ iface = &net->ksnn_interfaces[j];
+ ip = iface->ksni_ipaddr;
+
+ for (k = 0; k < peer->ksnp_n_passive_ips; k++)
+ if (peer->ksnp_passive_ips[k] == ip)
+ break;
+
+ if (k < peer->ksnp_n_passive_ips) /* using it already */
+ continue;
+
+ k = ksocknal_match_peerip(iface, peerips, n_peerips);
+ xor = (ip ^ peerips[k]);
+ this_netmatch = ((xor & iface->ksni_netmask) == 0) ? 1 : 0;
+
+ if (!(best_iface == NULL ||
+ best_netmatch < this_netmatch ||
+ (best_netmatch == this_netmatch &&
+ best_npeers > iface->ksni_npeers)))
+ continue;
+
+ best_iface = iface;
+ best_netmatch = this_netmatch;
+ best_npeers = iface->ksni_npeers;
+ }
+
+ best_iface->ksni_npeers++;
+ ip = best_iface->ksni_ipaddr;
+ peer->ksnp_passive_ips[i] = ip;
+ peer->ksnp_n_passive_ips = i+1;
+ }
+
+ LASSERT (best_iface != NULL);
+
+ /* mark the best matching peer IP used */
+ j = ksocknal_match_peerip(best_iface, peerips, n_peerips);
+ peerips[j] = 0;
+ }
+
+ /* Overwrite input peer IP addresses */
+ memcpy(peerips, peer->ksnp_passive_ips, n_ips * sizeof(*peerips));
+
+ write_unlock_bh (global_lock);
+
+ return (n_ips);
+}
+
+void
+ksocknal_create_routes(ksock_peer_t *peer, int port,
+ __u32 *peer_ipaddrs, int npeer_ipaddrs)
+{
+ ksock_route_t *newroute = NULL;
+ rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
+ lnet_ni_t *ni = peer->ksnp_ni;
+ ksock_net_t *net = ni->ni_data;
+ struct list_head *rtmp;
+ ksock_route_t *route;
+ ksock_interface_t *iface;
+ ksock_interface_t *best_iface;
+ int best_netmatch;
+ int this_netmatch;
+ int best_nroutes;
+ int i;
+ int j;
+
+ /* CAVEAT EMPTOR: We do all our interface matching with an
+ * exclusive hold of global lock at IRQ priority. We're only
+ * expecting to be dealing with small numbers of interfaces, so the
+ * O(n**3)-ness here shouldn't matter */
+
+ write_lock_bh (global_lock);
+
+ if (net->ksnn_ninterfaces < 2) {
+ /* Only create additional connections
+ * if I have > 1 interface */
+ write_unlock_bh (global_lock);
+ return;
+ }
+
+ LASSERT (npeer_ipaddrs <= LNET_MAX_INTERFACES);
+
+ for (i = 0; i < npeer_ipaddrs; i++) {
+ if (newroute != NULL) {
+ newroute->ksnr_ipaddr = peer_ipaddrs[i];
+ } else {
+ write_unlock_bh (global_lock);
+
+ newroute = ksocknal_create_route(peer_ipaddrs[i], port);
+ if (newroute == NULL)
+ return;
+
+ write_lock_bh (global_lock);
+ }
- ret = -EINVAL;
- sock = socki_lookup(file->f_dentry->d_inode);
- if (sock == NULL)
- GOTO(error, ret);
+ if (peer->ksnp_closing) {
+ /* peer got closed under me */
+ break;
+ }
+
+ /* Already got a route? */
+ route = NULL;
+ list_for_each(rtmp, &peer->ksnp_routes) {
+ route = list_entry(rtmp, ksock_route_t, ksnr_list);
+
+ if (route->ksnr_ipaddr == newroute->ksnr_ipaddr)
+ break;
+
+ route = NULL;
+ }
+ if (route != NULL)
+ continue;
+
+ best_iface = NULL;
+ best_nroutes = 0;
+ best_netmatch = 0;
+
+ LASSERT (net->ksnn_ninterfaces <= LNET_MAX_INTERFACES);
+
+ /* Select interface to connect from */
+ for (j = 0; j < net->ksnn_ninterfaces; j++) {
+ iface = &net->ksnn_interfaces[j];
+
+ /* Using this interface already? */
+ list_for_each(rtmp, &peer->ksnp_routes) {
+ route = list_entry(rtmp, ksock_route_t, ksnr_list);
- ret = -ENOMEM;
- PORTAL_ALLOC(conn, sizeof(*conn));
- if (!conn)
- GOTO(error, ret);
+ if (route->ksnr_myipaddr == iface->ksni_ipaddr)
+ break;
- sock->sk->allocation = GFP_NOFS; /* don't call info fs for alloc */
+ route = NULL;
+ }
+ if (route != NULL)
+ continue;
+
+ this_netmatch = (((iface->ksni_ipaddr ^
+ newroute->ksnr_ipaddr) &
+ iface->ksni_netmask) == 0) ? 1 : 0;
+
+ if (!(best_iface == NULL ||
+ best_netmatch < this_netmatch ||
+ (best_netmatch == this_netmatch &&
+ best_nroutes > iface->ksni_nroutes)))
+ continue;
+
+ best_iface = iface;
+ best_netmatch = this_netmatch;
+ best_nroutes = iface->ksni_nroutes;
+ }
+
+ if (best_iface == NULL)
+ continue;
+
+ newroute->ksnr_myipaddr = best_iface->ksni_ipaddr;
+ best_iface->ksni_nroutes++;
+
+ ksocknal_add_route_locked(peer, newroute);
+ newroute = NULL;
+ }
- conn->ksnc_file = file;
+ write_unlock_bh (global_lock);
+ if (newroute != NULL)
+ ksocknal_route_decref(newroute);
+}
+
+int
+ksocknal_accept (lnet_ni_t *ni, cfs_socket_t *sock)
+{
+ ksock_connreq_t *cr;
+ int rc;
+ __u32 peer_ip;
+ int peer_port;
+
+ rc = libcfs_sock_getaddr(sock, 1, &peer_ip, &peer_port);
+ LASSERT (rc == 0); /* we succeeded before */
+
+ LIBCFS_ALLOC(cr, sizeof(*cr));
+ if (cr == NULL) {
+ LCONSOLE_ERROR_MSG(0x12f, "Dropping connection request from "
+ "%u.%u.%u.%u: memory exhausted\n",
+ HIPQUAD(peer_ip));
+ return -ENOMEM;
+ }
+
+ lnet_ni_addref(ni);
+ cr->ksncr_ni = ni;
+ cr->ksncr_sock = sock;
+
+ spin_lock_bh (&ksocknal_data.ksnd_connd_lock);
+
+ list_add_tail(&cr->ksncr_list, &ksocknal_data.ksnd_connd_connreqs);
+ cfs_waitq_signal(&ksocknal_data.ksnd_connd_waitq);
+
+ spin_unlock_bh (&ksocknal_data.ksnd_connd_lock);
+ return 0;
+}
+
+int
+ksocknal_create_conn (lnet_ni_t *ni, ksock_route_t *route,
+ cfs_socket_t *sock, int type)
+{
+ rwlock_t *global_lock = &ksocknal_data.ksnd_global_lock;
+ CFS_LIST_HEAD (zombies);
+ lnet_process_id_t peerid;
+ struct list_head *tmp;
+ __u64 incarnation;
+ ksock_conn_t *conn;
+ ksock_conn_t *conn2;
+ ksock_peer_t *peer = NULL;
+ ksock_peer_t *peer2;
+ ksock_sched_t *sched;
+ ksock_hello_msg_t *hello;
+ unsigned int irq;
+ ksock_tx_t *tx;
+ int rc;
+ int active;
+ char *warn = NULL;
+
+ active = (route != NULL);
+
+ LASSERT (active == (type != SOCKLND_CONN_NONE));
+ LASSERT (route == NULL || route->ksnr_proto != NULL);
+
+ irq = ksocknal_lib_sock_irq (sock);
+
+ LIBCFS_ALLOC(conn, sizeof(*conn));
+ if (conn == NULL) {
+ rc = -ENOMEM;
+ goto failed_0;
+ }
+
+ memset (conn, 0, sizeof (*conn));
+ conn->ksnc_peer = NULL;
+ conn->ksnc_route = NULL;
conn->ksnc_sock = sock;
- conn->ksnc_saved_data_ready = sock->sk->data_ready;
- conn->ksnc_saved_write_space = sock->sk->write_space;
- conn->ksnc_peernid = nid;
- atomic_set (&conn->ksnc_refcount, 1); /* 1 ref for socklist */
+ atomic_set (&conn->ksnc_sock_refcount, 1); /* 1 ref for conn */
+ conn->ksnc_type = type;
+ ksocknal_lib_save_callback(sock, conn);
+ atomic_set (&conn->ksnc_conn_refcount, 1); /* 1 ref for me */
+
+ conn->ksnc_zc_capable = ksocknal_lib_zc_capable(sock);
conn->ksnc_rx_ready = 0;
conn->ksnc_rx_scheduled = 0;
- ksocknal_new_packet (conn, 0);
- INIT_LIST_HEAD (&conn->ksnc_tx_queue);
+ CFS_INIT_LIST_HEAD (&conn->ksnc_tx_queue);
conn->ksnc_tx_ready = 0;
conn->ksnc_tx_scheduled = 0;
+ conn->ksnc_tx_mono = NULL;
+ atomic_set (&conn->ksnc_tx_nob, 0);
+
+ LIBCFS_ALLOC(hello, offsetof(ksock_hello_msg_t,
+ kshm_ips[LNET_MAX_INTERFACES]));
+ if (hello == NULL) {
+ rc = -ENOMEM;
+ goto failed_1;
+ }
+
+ /* stash conn's local and remote addrs */
+ rc = ksocknal_lib_get_conn_addrs (conn);
+ if (rc != 0)
+ goto failed_1;
+
+ /* Find out/confirm peer's NID and connection type and get the
+ * vector of interfaces she's willing to let me connect to.
+ * Passive connections use the listener timeout since the peer sends
+ * eagerly */
+
+ if (active) {
+ LASSERT(ni == route->ksnr_peer->ksnp_ni);
+
+ /* Active connection sends HELLO eagerly */
+ hello->kshm_nips = ksocknal_local_ipvec(ni, hello->kshm_ips);
+ peerid = route->ksnr_peer->ksnp_id;
+ conn->ksnc_proto = route->ksnr_proto;
+
+ rc = ksocknal_send_hello (ni, conn, peerid.nid, hello);
+ if (rc != 0)
+ goto failed_1;
+ } else {
+ peerid.nid = LNET_NID_ANY;
+ peerid.pid = LNET_PID_ANY;
+
+ /* Passive, get protocol from peer */
+ conn->ksnc_proto = NULL;
+ }
+
+ rc = ksocknal_recv_hello (ni, conn, hello, &peerid, &incarnation);
+ if (rc < 0) {
+ if (rc == -EALREADY) {
+ /* only active connection loses conn race */
+ LASSERT (active);
+
+ CDEBUG(D_NET, "Lost connection race with %s\n",
+ libcfs_id2str(peerid));
+ /* Not an actual failure: return +ve RC so active
+ * connector can back off */
+ rc = EALREADY;
+ }
+ goto failed_1;
+ }
+
+ if (active && route->ksnr_proto != conn->ksnc_proto) {
+ /* Active connecting, and different protocol is returned */
+ CDEBUG(D_NET, "Connecting by %d.x protocol is rejected,"
+ " compatible version %d.x found.\n",
+ route->ksnr_proto->pro_version,
+ conn->ksnc_proto->pro_version);
+ /* Not an actual failure: return +ve RC so active
+ * connector can back off */
+ rc = EPROTO;
+
+ /* Retry with peer's protocol later */
+ route->ksnr_proto = conn->ksnc_proto;
+
+ goto failed_1;
+ }
+
+ LASSERT (peerid.nid != LNET_NID_ANY);
+
+ if (active) {
+ peer = route->ksnr_peer;
+ ksocknal_peer_addref(peer);
+
+ /* additional routes after interface exchange? */
+ ksocknal_create_routes(peer, conn->ksnc_port,
+ hello->kshm_ips, hello->kshm_nips);
+
+ /* setup the socket AFTER I've received hello (it disables
+ * SO_LINGER). I might call back to the acceptor who may want
+ * to send a protocol version response and then close the
+ * socket; this ensures the socket only tears down after the
+ * response has been sent. */
+ rc = ksocknal_lib_setup_sock(sock);
+
+ write_lock_bh (global_lock);
+
+ if (rc != 0)
+ goto failed_2;
+ } else {
+ rc = ksocknal_create_peer(&peer, ni, peerid);
+ if (rc != 0)
+ goto failed_1;
+
+ write_lock_bh (global_lock);
+
+ peer2 = ksocknal_find_peer_locked(ni, peerid);
+ if (peer2 == NULL) {
+ /* NB this puts an "empty" peer in the peer
+ * table (which takes my ref) */
+ list_add_tail(&peer->ksnp_list,
+ ksocknal_nid2peerlist(peerid.nid));
+ } else {
+ ksocknal_peer_decref(peer);
+ peer = peer2;
+ }
+
+ /* +1 ref for me */
+ ksocknal_peer_addref(peer);
+ peer->ksnp_accepting++;
+
+ /* Am I already connecting to this guy? Resolve in
+ * favour of higher NID... */
+ rc = 0;
+ if (peerid.nid < ni->ni_nid) {
+ list_for_each(tmp, &peer->ksnp_routes) {
+ route = list_entry(tmp, ksock_route_t,
+ ksnr_list);
+
+ if (route->ksnr_ipaddr != conn->ksnc_ipaddr)
+ continue;
+
+ if (route->ksnr_connecting) {
+ rc = EALREADY; /* not a failure */
+ warn = "connection race";
+ }
+
+ break;
+ }
+ }
+ route = NULL;
+
+ write_unlock_bh (global_lock);
+
+ if (rc != 0) {
+ /* set CONN_NONE makes returned HELLO acknowledge I
+ * lost a connection race */
+ conn->ksnc_type = SOCKLND_CONN_NONE;
+ hello->kshm_nips = 0;
+ ksocknal_send_hello(ni, conn, peerid.nid, hello);
+ } else {
+ hello->kshm_nips = ksocknal_select_ips(peer, hello->kshm_ips,
+ hello->kshm_nips);
+ rc = ksocknal_send_hello(ni, conn, peerid.nid, hello);
+
+ /* Setup the socket (it disables SO_LINGER). I don't
+ * do it if I'm sending a negative response to ensure
+ * the response isn't discarded when I close the socket
+ * immediately after sending it. */
+ if (rc == 0)
+ rc = ksocknal_lib_setup_sock(sock);
+ }
+
+ write_lock_bh (global_lock);
+ peer->ksnp_accepting--;
+
+ if (rc != 0)
+ goto failed_2;
+ }
+
+ if (peer->ksnp_closing ||
+ (active && route->ksnr_deleted)) {
+ /* peer/route got closed under me */
+ rc = -ESTALE;
+ warn = "peer/route removed";
+ goto failed_2;
+ }
+
+ /* Refuse to duplicate an existing connection, unless this is a
+ * loopback connection */
+ if (conn->ksnc_ipaddr != conn->ksnc_myipaddr) {
+ list_for_each(tmp, &peer->ksnp_conns) {
+ conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
+
+ if (conn2->ksnc_ipaddr != conn->ksnc_ipaddr ||
+ conn2->ksnc_myipaddr != conn->ksnc_myipaddr ||
+ conn2->ksnc_type != conn->ksnc_type ||
+ conn2->ksnc_incarnation != incarnation)
+ continue;
+
+ rc = 0; /* more of a NOOP than a failure */
+ warn = "duplicate";
+ goto failed_2;
+ }
+ }
+
+ /* If the connection created by this route didn't bind to the IP
+ * address the route connected to, the connection/route matching
+ * code below probably isn't going to work. */
+ if (active &&
+ route->ksnr_ipaddr != conn->ksnc_ipaddr) {
+ CERROR("Route %s %u.%u.%u.%u connected to %u.%u.%u.%u\n",
+ libcfs_id2str(peer->ksnp_id),
+ HIPQUAD(route->ksnr_ipaddr),
+ HIPQUAD(conn->ksnc_ipaddr));
+ }
+
+ /* Search for a route corresponding to the new connection and
+ * create an association. This allows incoming connections created
+ * by routes in my peer to match my own route entries so I don't
+ * continually create duplicate routes. */
+ list_for_each (tmp, &peer->ksnp_routes) {
+ route = list_entry(tmp, ksock_route_t, ksnr_list);
+
+ if (route->ksnr_ipaddr != conn->ksnc_ipaddr)
+ continue;
+
+ ksocknal_associate_route_conn_locked(route, conn);
+ break;
+ }
+
+ conn->ksnc_peer = peer; /* conn takes my ref on peer */
+ conn->ksnc_incarnation = incarnation;
+ peer->ksnp_last_alive = cfs_time_current();
+ peer->ksnp_error = 0;
+
+ sched = ksocknal_choose_scheduler_locked (irq);
+ sched->kss_nconns++;
+ conn->ksnc_scheduler = sched;
+
+ /* Set the deadline for the outgoing HELLO to drain */
+ conn->ksnc_tx_bufnob = SOCK_WMEM_QUEUED(sock);
+ conn->ksnc_tx_deadline = cfs_time_shift(*ksocknal_tunables.ksnd_timeout);
+ mb(); /* order with adding to peer's conn list */
+
+ list_add (&conn->ksnc_list, &peer->ksnp_conns);
+ ksocknal_conn_addref(conn);
+
+ ksocknal_new_packet(conn, 0);
+
+ /* NB my callbacks block while I hold ksnd_global_lock */
+ ksocknal_lib_set_callback(sock, conn);
+
+ /* Take all the packets blocking for a connection.
+ * NB, it might be nicer to share these blocked packets among any
+ * other connections that are becoming established. */
+ while (!list_empty (&peer->ksnp_tx_queue)) {
+ tx = list_entry (peer->ksnp_tx_queue.next,
+ ksock_tx_t, tx_list);
+
+ list_del (&tx->tx_list);
+ ksocknal_queue_tx_locked (tx, conn);
+ }
+
+ rc = ksocknal_close_stale_conns_locked(peer, incarnation);
+ write_unlock_bh (global_lock);
+
+ if (rc != 0)
+ CDEBUG(D_NET, "Closed %d stale conns to %s ip %d.%d.%d.%d\n",
+ rc, libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ HIPQUAD(conn->ksnc_ipaddr));
+
+ ksocknal_lib_bind_irq (irq);
+
+ /* Call the callbacks right now to get things going. */
+ if (ksocknal_connsock_addref(conn) == 0) {
+ ksocknal_read_callback(conn);
+ ksocknal_write_callback(conn);
+ ksocknal_connsock_decref(conn);
+ }
+
+ CDEBUG(D_NET, "New conn %s %u.%u.%u.%u -> %u.%u.%u.%u/%d"
+ " incarnation:"LPD64" sched[%d]/%d\n",
+ libcfs_id2str(peerid), HIPQUAD(conn->ksnc_myipaddr),
+ HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port, incarnation,
+ (int)(conn->ksnc_scheduler - ksocknal_data.ksnd_schedulers), irq);
+
+ LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
+ kshm_ips[LNET_MAX_INTERFACES]));
+
+ ksocknal_conn_decref(conn);
+ return (0);
+
+ failed_2:
+ if (!peer->ksnp_closing &&
+ list_empty (&peer->ksnp_conns) &&
+ list_empty (&peer->ksnp_routes)) {
+ list_add(&zombies, &peer->ksnp_tx_queue);
+ list_del_init(&peer->ksnp_tx_queue);
+ ksocknal_unlink_peer_locked(peer);
+ }
+
+ write_unlock_bh (global_lock);
+
+ if (warn != NULL) {
+ if (rc < 0)
+ CERROR("Not creating conn %s type %d: %s\n",
+ libcfs_id2str(peerid), conn->ksnc_type, warn);
+ else
+ CDEBUG(D_NET, "Not creating conn %s type %d: %s\n",
+ libcfs_id2str(peerid), conn->ksnc_type, warn);
+ }
+
+ ksocknal_txlist_done(ni, &zombies, 1);
+ ksocknal_peer_decref(peer);
+
+ failed_1:
+ if (hello != NULL)
+ LIBCFS_FREE(hello, offsetof(ksock_hello_msg_t,
+ kshm_ips[LNET_MAX_INTERFACES]));
+
+ LIBCFS_FREE (conn, sizeof(*conn));
+
+ failed_0:
+ libcfs_sock_release(sock);
+ return rc;
+}
+
+void
+ksocknal_close_conn_locked (ksock_conn_t *conn, int error)
+{
+ /* This just does the immmediate housekeeping, and queues the
+ * connection for the reaper to terminate.
+ * Caller holds ksnd_global_lock exclusively in irq context */
+ ksock_peer_t *peer = conn->ksnc_peer;
+ ksock_route_t *route;
+ ksock_conn_t *conn2;
+ struct list_head *tmp;
+
+ LASSERT (peer->ksnp_error == 0);
+ LASSERT (!conn->ksnc_closing);
+ conn->ksnc_closing = 1;
+
+ /* ksnd_deathrow_conns takes over peer's ref */
+ list_del (&conn->ksnc_list);
+
+ route = conn->ksnc_route;
+ if (route != NULL) {
+ /* dissociate conn from route... */
+ LASSERT (!route->ksnr_deleted);
+ LASSERT ((route->ksnr_connected & (1 << conn->ksnc_type)) != 0);
+
+ conn2 = NULL;
+ list_for_each(tmp, &peer->ksnp_conns) {
+ conn2 = list_entry(tmp, ksock_conn_t, ksnc_list);
+
+ if (conn2->ksnc_route == route &&
+ conn2->ksnc_type == conn->ksnc_type)
+ break;
+
+ conn2 = NULL;
+ }
+ if (conn2 == NULL)
+ route->ksnr_connected &= ~(1 << conn->ksnc_type);
+
+ conn->ksnc_route = NULL;
+
+#if 0 /* irrelevent with only eager routes */
+ list_del (&route->ksnr_list); /* make route least favourite */
+ list_add_tail (&route->ksnr_list, &peer->ksnp_routes);
+#endif
+ ksocknal_route_decref(route); /* drop conn's ref on route */
+ }
-#warning check it is OK to derefence sk->dst_cache->dev like this...
- lock_sock (conn->ksnc_sock->sk);
+ if (list_empty (&peer->ksnp_conns)) {
+ /* No more connections to this peer */
- if (conn->ksnc_sock->sk->dst_cache != NULL) {
- dev = conn->ksnc_sock->sk->dst_cache->dev;
- if (dev != NULL) {
- irq = dev->irq;
- if (irq >= NR_IRQS) {
- CERROR ("Unexpected IRQ %x\n", irq);
- irq = 0;
- }
+ peer->ksnp_error = error; /* stash last conn close reason */
+
+ if (list_empty (&peer->ksnp_routes)) {
+ /* I've just closed last conn belonging to a
+ * peer with no routes to it */
+ ksocknal_unlink_peer_locked (peer);
}
}
- release_sock (conn->ksnc_sock->sk);
+ spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
+
+ list_add_tail (&conn->ksnc_list, &ksocknal_data.ksnd_deathrow_conns);
+ cfs_waitq_signal (&ksocknal_data.ksnd_reaper_waitq);
+
+ spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
+}
+
+void
+ksocknal_peer_failed (ksock_peer_t *peer)
+{
+ time_t last_alive = 0;
+ int notify = 0;
+
+ /* There has been a connection failure or comms error; but I'll only
+ * tell LNET I think the peer is dead if it's to another kernel and
+ * there are no connections or connection attempts in existance. */
+
+ read_lock (&ksocknal_data.ksnd_global_lock);
+
+ if ((peer->ksnp_id.pid & LNET_PID_USERFLAG) == 0 &&
+ list_empty(&peer->ksnp_conns) &&
+ peer->ksnp_accepting == 0 &&
+ ksocknal_find_connecting_route_locked(peer) == NULL) {
+ notify = 1;
+ last_alive = cfs_time_current_sec() -
+ cfs_duration_sec(cfs_time_current() -
+ peer->ksnp_last_alive);
+ }
+
+ read_unlock (&ksocknal_data.ksnd_global_lock);
- write_lock_irqsave (&ksocknal_data.ksnd_socklist_lock, flags);
+ if (notify)
+ lnet_notify (peer->ksnp_ni, peer->ksnp_id.nid, 0,
+ last_alive);
+}
- if (irq == 0 ||
- ksocknal_data.ksnd_irq_info[irq] == SOCKNAL_IRQ_UNASSIGNED) {
- /* This is a software NIC, or we haven't associated it with
- * a CPU yet */
+void
+ksocknal_terminate_conn (ksock_conn_t *conn)
+{
+ /* This gets called by the reaper (guaranteed thread context) to
+ * disengage the socket from its callbacks and close it.
+ * ksnc_refcount will eventually hit zero, and then the reaper will
+ * destroy it. */
+ ksock_peer_t *peer = conn->ksnc_peer;
+ ksock_sched_t *sched = conn->ksnc_scheduler;
+ int failed = 0;
+ struct list_head *tmp;
+ struct list_head *nxt;
+ ksock_tx_t *tx;
+ LIST_HEAD (zlist);
+
+ LASSERT(conn->ksnc_closing);
+
+ /* wake up the scheduler to "send" all remaining packets to /dev/null */
+ spin_lock_bh (&sched->kss_lock);
+
+ if (!conn->ksnc_tx_scheduled &&
+ !list_empty(&conn->ksnc_tx_queue)){
+ list_add_tail (&conn->ksnc_tx_list,
+ &sched->kss_tx_conns);
+ /* a closing conn is always ready to tx */
+ conn->ksnc_tx_ready = 1;
+ conn->ksnc_tx_scheduled = 1;
+ /* extra ref for scheduler */
+ ksocknal_conn_addref(conn);
+
+ cfs_waitq_signal (&sched->kss_waitq);
+ }
- /* Choose the CPU with the fewest connections */
- sched = ksocknal_data.ksnd_schedulers;
- for (idx = 1; idx < SOCKNAL_N_SCHED; idx++)
- if (sched->kss_nconns >
- ksocknal_data.ksnd_schedulers[idx].kss_nconns)
- sched = &ksocknal_data.ksnd_schedulers[idx];
+ spin_unlock_bh (&sched->kss_lock);
- if (irq != 0) { /* Hardware NIC */
- /* Remember which scheduler we chose */
- idx = sched - ksocknal_data.ksnd_schedulers;
+ spin_lock(&peer->ksnp_lock);
- LASSERT (idx < SOCKNAL_IRQ_SCHED_MASK);
+ list_for_each_safe(tmp, nxt, &peer->ksnp_zc_req_list) {
+ tx = list_entry(tmp, ksock_tx_t, tx_zc_list);
- if (bind_irq) /* remember if we will bind below */
- idx |= SOCKNAL_IRQ_BOUND;
+ if (tx->tx_conn != conn)
+ continue;
- ksocknal_data.ksnd_irq_info[irq] = idx;
- }
- } else {
- /* This is a hardware NIC, associated with a CPU */
- idx = ksocknal_data.ksnd_irq_info[irq];
+ LASSERT (tx->tx_msg.ksm_zc_req_cookie != 0);
- /* Don't bind again if we've bound already */
- if ((idx & SOCKNAL_IRQ_BOUND) != 0)
- bind_irq = 0;
-
- sched = &ksocknal_data.ksnd_schedulers[idx & SOCKNAL_IRQ_SCHED_MASK];
+ tx->tx_msg.ksm_zc_req_cookie = 0;
+ list_del(&tx->tx_zc_list);
+ list_add(&tx->tx_zc_list, &zlist);
}
- sched->kss_nconns++;
- conn->ksnc_scheduler = sched;
+ spin_unlock(&peer->ksnp_lock);
- list_add(&conn->ksnc_list, &ksocknal_data.ksnd_socklist);
+ list_for_each_safe(tmp, nxt, &zlist) {
+ tx = list_entry(tmp, ksock_tx_t, tx_zc_list);
+
+ list_del(&tx->tx_zc_list);
+ ksocknal_tx_decref(tx);
+ }
- write_unlock_irqrestore (&ksocknal_data.ksnd_socklist_lock, flags);
+ /* serialise with callbacks */
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
- if (bind_irq && /* irq binding required */
- irq != 0) /* hardware NIC */
- ksocknal_bind_irq (irq, sched - ksocknal_data.ksnd_schedulers);
+ ksocknal_lib_reset_callback(conn->ksnc_sock, conn);
- /* NOW it's safe to get called back when socket is ready... */
- sock->sk->user_data = conn;
- sock->sk->data_ready = ksocknal_data_ready;
- sock->sk->write_space = ksocknal_write_space;
+ /* OK, so this conn may not be completely disengaged from its
+ * scheduler yet, but it _has_ committed to terminate... */
+ conn->ksnc_scheduler->kss_nconns--;
- /* ...which I call right now to get things going */
- ksocknal_data_ready (sock->sk, 0);
- ksocknal_write_space (sock->sk);
+ if (peer->ksnp_error != 0) {
+ /* peer's last conn closed in error */
+ LASSERT (list_empty (&peer->ksnp_conns));
+ failed = 1;
+ peer->ksnp_error = 0; /* avoid multiple notifications */
+ }
- CDEBUG(D_IOCTL, "conn [%p] registered for nid "LPX64"\n",
- conn, conn->ksnc_peernid);
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
- /* Can't unload while connection active */
- PORTAL_MODULE_USE;
- RETURN(0);
+ if (failed)
+ ksocknal_peer_failed(peer);
-error:
- fput(file);
- return (ret);
+ /* The socket is closed on the final put; either here, or in
+ * ksocknal_{send,recv}msg(). Since we set up the linger2 option
+ * when the connection was established, this will close the socket
+ * immediately, aborting anything buffered in it. Any hung
+ * zero-copy transmits will therefore complete in finite time. */
+ ksocknal_connsock_decref(conn);
}
-/* Passing in a zero nid will close all connections */
-int
-ksocknal_close_sock(ptl_nid_t nid)
+void
+ksocknal_queue_zombie_conn (ksock_conn_t *conn)
{
- long flags;
- ksock_conn_t *conn;
- LIST_HEAD (death_row);
- struct list_head *tmp;
-
- LASSERT (!in_interrupt());
- write_lock_irqsave (&ksocknal_data.ksnd_socklist_lock, flags);
+ /* Queue the conn for the reaper to destroy */
- if (nid == 0) { /* close ALL connections */
- /* insert 'death row' into the socket list... */
- list_add (&death_row, &ksocknal_data.ksnd_socklist);
- /* ...extract and reinitialise the socket list itself... */
- list_del_init (&ksocknal_data.ksnd_socklist);
- /* ...and voila, death row is the proud owner of all conns */
- } else list_for_each (tmp, &ksocknal_data.ksnd_socklist) {
+ LASSERT (atomic_read(&conn->ksnc_conn_refcount) == 0);
+ spin_lock_bh (&ksocknal_data.ksnd_reaper_lock);
- conn = list_entry (tmp, ksock_conn_t, ksnc_list);
+ list_add_tail(&conn->ksnc_list, &ksocknal_data.ksnd_zombie_conns);
+ cfs_waitq_signal(&ksocknal_data.ksnd_reaper_waitq);
+
+ spin_unlock_bh (&ksocknal_data.ksnd_reaper_lock);
+}
- if (conn->ksnc_peernid == nid) {
- list_del (&conn->ksnc_list);
- list_add (&conn->ksnc_list, &death_row);
- break;
- }
+void
+ksocknal_destroy_conn (ksock_conn_t *conn)
+{
+ /* Final coup-de-grace of the reaper */
+ CDEBUG (D_NET, "connection %p\n", conn);
+
+ LASSERT (atomic_read (&conn->ksnc_conn_refcount) == 0);
+ LASSERT (atomic_read (&conn->ksnc_sock_refcount) == 0);
+ LASSERT (conn->ksnc_sock == NULL);
+ LASSERT (conn->ksnc_route == NULL);
+ LASSERT (!conn->ksnc_tx_scheduled);
+ LASSERT (!conn->ksnc_rx_scheduled);
+ LASSERT (list_empty(&conn->ksnc_tx_queue));
+
+ /* complete current receive if any */
+ switch (conn->ksnc_rx_state) {
+ case SOCKNAL_RX_LNET_PAYLOAD:
+ CERROR("Completing partial receive from %s"
+ ", ip %d.%d.%d.%d:%d, with error\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
+ lnet_finalize (conn->ksnc_peer->ksnp_ni,
+ conn->ksnc_cookie, -EIO);
+ break;
+ case SOCKNAL_RX_LNET_HEADER:
+ if (conn->ksnc_rx_started)
+ CERROR("Incomplete receive of lnet header from %s"
+ ", ip %d.%d.%d.%d:%d, with error, protocol: %d.x.\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port,
+ conn->ksnc_proto->pro_version);
+ break;
+ case SOCKNAL_RX_KSM_HEADER:
+ if (conn->ksnc_rx_started)
+ CERROR("Incomplete receive of ksock message from %s"
+ ", ip %d.%d.%d.%d:%d, with error, protocol: %d.x.\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port,
+ conn->ksnc_proto->pro_version);
+ break;
+ case SOCKNAL_RX_SLOP:
+ if (conn->ksnc_rx_started)
+ CERROR("Incomplete receive of slops from %s"
+ ", ip %d.%d.%d.%d:%d, with error\n",
+ libcfs_id2str(conn->ksnc_peer->ksnp_id),
+ HIPQUAD(conn->ksnc_ipaddr), conn->ksnc_port);
+ break;
+ default:
+ LBUG ();
+ break;
}
- write_unlock_irqrestore (&ksocknal_data.ksnd_socklist_lock, flags);
+ ksocknal_peer_decref(conn->ksnc_peer);
- if (nid && list_empty (&death_row))
- return (-ENOENT);
+ LIBCFS_FREE (conn, sizeof (*conn));
+}
- while (!list_empty (&death_row)) {
- conn = list_entry (death_row.next, ksock_conn_t, ksnc_list);
- list_del (&conn->ksnc_list);
+int
+ksocknal_close_peer_conns_locked (ksock_peer_t *peer, __u32 ipaddr, int why)
+{
+ ksock_conn_t *conn;
+ struct list_head *ctmp;
+ struct list_head *cnxt;
+ int count = 0;
+
+ list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
+ conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
+
+ if (ipaddr == 0 ||
+ conn->ksnc_ipaddr == ipaddr) {
+ count++;
+ ksocknal_close_conn_locked (conn, why);
+ }
+ }
- /* NB I _have_ to restore the callback, rather than storing
- * a noop, since the socket could survive past this module
- * being unloaded!! */
- conn->ksnc_sock->sk->data_ready = conn->ksnc_saved_data_ready;
- conn->ksnc_sock->sk->write_space = conn->ksnc_saved_write_space;
+ return (count);
+}
- /* OK; no more callbacks, but they could be in progress now,
- * so wait for them to complete... */
- write_lock_irqsave (&ksocknal_data.ksnd_socklist_lock, flags);
+int
+ksocknal_close_stale_conns_locked (ksock_peer_t *peer, __u64 incarnation)
+{
+ ksock_conn_t *conn;
+ struct list_head *ctmp;
+ struct list_head *cnxt;
+ int count = 0;
- /* ...however if I get the lock before a callback gets it,
- * this will make them noop
- */
- conn->ksnc_sock->sk->user_data = NULL;
+ list_for_each_safe (ctmp, cnxt, &peer->ksnp_conns) {
+ conn = list_entry (ctmp, ksock_conn_t, ksnc_list);
- /* And drop the scheduler's connection count while I've got
- * the exclusive lock */
- conn->ksnc_scheduler->kss_nconns--;
+ if (conn->ksnc_incarnation == incarnation)
+ continue;
- write_unlock_irqrestore(&ksocknal_data.ksnd_socklist_lock,
- flags);
+ CDEBUG(D_NET, "Closing stale conn %s ip:%08x/%d "
+ "incarnation:"LPD64"("LPD64")\n",
+ libcfs_id2str(peer->ksnp_id),
+ conn->ksnc_ipaddr, conn->ksnc_port,
+ conn->ksnc_incarnation, incarnation);
- ksocknal_put_conn (conn); /* drop ref for ksnd_socklist */
+ count++;
+ ksocknal_close_conn_locked (conn, -ESTALE);
}
- return (0);
+ return (count);
}
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-struct tcp_opt *sock2tcp_opt(struct sock *sk)
-{
- return &(sk->tp_pinfo.af_tcp);
-}
-#else
-struct tcp_opt *sock2tcp_opt(struct sock *sk)
+int
+ksocknal_close_conn_and_siblings (ksock_conn_t *conn, int why)
{
- struct tcp_sock *s = (struct tcp_sock *)sk;
- return &s->tcp;
+ ksock_peer_t *peer = conn->ksnc_peer;
+ __u32 ipaddr = conn->ksnc_ipaddr;
+ int count;
+
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
+
+ count = ksocknal_close_peer_conns_locked (peer, ipaddr, why);
+
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+
+ return (count);
}
-#endif
-void
-ksocknal_push_conn (ksock_conn_t *conn)
+int
+ksocknal_close_matching_conns (lnet_process_id_t id, __u32 ipaddr)
{
- struct sock *sk = conn->ksnc_sock->sk;
- struct tcp_opt *tp = sock2tcp_opt(sk);
- int nonagle;
- int val = 1;
- int rc;
- mm_segment_t oldmm;
+ ksock_peer_t *peer;
+ struct list_head *ptmp;
+ struct list_head *pnxt;
+ int lo;
+ int hi;
+ int i;
+ int count = 0;
+
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
+
+ if (id.nid != LNET_NID_ANY)
+ lo = hi = ksocknal_nid2peerlist(id.nid) - ksocknal_data.ksnd_peers;
+ else {
+ lo = 0;
+ hi = ksocknal_data.ksnd_peer_hash_size - 1;
+ }
+
+ for (i = lo; i <= hi; i++) {
+ list_for_each_safe (ptmp, pnxt, &ksocknal_data.ksnd_peers[i]) {
- lock_sock (sk);
- nonagle = tp->nonagle;
- tp->nonagle = 1;
- release_sock (sk);
+ peer = list_entry (ptmp, ksock_peer_t, ksnp_list);
- oldmm = get_fs ();
- set_fs (KERNEL_DS);
+ if (!((id.nid == LNET_NID_ANY || id.nid == peer->ksnp_id.nid) &&
+ (id.pid == LNET_PID_ANY || id.pid == peer->ksnp_id.pid)))
+ continue;
- rc = sk->prot->setsockopt (sk, SOL_TCP, TCP_NODELAY,
- (char *)&val, sizeof (val));
- LASSERT (rc == 0);
+ count += ksocknal_close_peer_conns_locked (peer, ipaddr, 0);
+ }
+ }
- set_fs (oldmm);
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
+
+ /* wildcards always succeed */
+ if (id.nid == LNET_NID_ANY || id.pid == LNET_PID_ANY || ipaddr == 0)
+ return (0);
- lock_sock (sk);
- tp->nonagle = nonagle;
- release_sock (sk);
+ return (count == 0 ? -ENOENT : 0);
}
-/* Passing in a zero nid pushes all connections */
-int
-ksocknal_push_sock (ptl_nid_t nid)
+void
+ksocknal_notify (lnet_ni_t *ni, lnet_nid_t gw_nid, int alive)
{
- ksock_conn_t *conn;
- struct list_head *tmp;
- int index;
- int i;
+ /* The router is telling me she's been notified of a change in
+ * gateway state.... */
+ lnet_process_id_t id = {.nid = gw_nid, .pid = LNET_PID_ANY};
- if (nid != 0) {
- conn = ksocknal_get_conn (nid);
+ CDEBUG (D_NET, "gw %s %s\n", libcfs_nid2str(gw_nid),
+ alive ? "up" : "down");
- if (conn == NULL)
- return (-ENOENT);
+ if (!alive) {
+ /* If the gateway crashed, close all open connections... */
+ ksocknal_close_matching_conns (id, 0);
+ return;
+ }
- ksocknal_push_conn (conn);
- ksocknal_put_conn (conn);
+ /* ...otherwise do nothing. We can only establish new connections
+ * if we have autroutes, and these connect on demand. */
+}
- return (0);
- }
+void
+ksocknal_push_peer (ksock_peer_t *peer)
+{
+ int index;
+ int i;
+ struct list_head *tmp;
+ ksock_conn_t *conn;
- /* NB we can't remove connections from the socket list so we have to
- * cope with them being removed from under us...
- */
for (index = 0; ; index++) {
- read_lock (&ksocknal_data.ksnd_socklist_lock);
+ read_lock (&ksocknal_data.ksnd_global_lock);
i = 0;
conn = NULL;
- list_for_each (tmp, &ksocknal_data.ksnd_socklist) {
+ list_for_each (tmp, &peer->ksnp_conns) {
if (i++ == index) {
- conn = list_entry(tmp, ksock_conn_t, ksnc_list);
- atomic_inc (&conn->ksnc_refcount); // take a ref
+ conn = list_entry (tmp, ksock_conn_t, ksnc_list);
+ ksocknal_conn_addref(conn);
break;
}
}
- read_unlock (&ksocknal_data.ksnd_socklist_lock);
+ read_unlock (&ksocknal_data.ksnd_global_lock);
if (conn == NULL)
break;
- ksocknal_push_conn (conn);
- ksocknal_put_conn (conn);
+ ksocknal_lib_push_conn (conn);
+ ksocknal_conn_decref(conn);
}
-
- return (0);
}
-ksock_conn_t *
-ksocknal_get_conn (ptl_nid_t nid)
+int
+ksocknal_push (lnet_ni_t *ni, lnet_process_id_t id)
{
- struct list_head *tmp;
- ksock_conn_t *conn;
+ ksock_peer_t *peer;
+ struct list_head *tmp;
+ int index;
+ int i;
+ int j;
+ int rc = -ENOENT;
+
+ for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
+ for (j = 0; ; j++) {
+ read_lock (&ksocknal_data.ksnd_global_lock);
+
+ index = 0;
+ peer = NULL;
+
+ list_for_each (tmp, &ksocknal_data.ksnd_peers[i]) {
+ peer = list_entry(tmp, ksock_peer_t,
+ ksnp_list);
+
+ if (!((id.nid == LNET_NID_ANY ||
+ id.nid == peer->ksnp_id.nid) &&
+ (id.pid == LNET_PID_ANY ||
+ id.pid == peer->ksnp_id.pid))) {
+ peer = NULL;
+ continue;
+ }
- PROF_START(conn_list_walk);
+ if (index++ == j) {
+ ksocknal_peer_addref(peer);
+ break;
+ }
+ }
- read_lock (&ksocknal_data.ksnd_socklist_lock);
+ read_unlock (&ksocknal_data.ksnd_global_lock);
- list_for_each(tmp, &ksocknal_data.ksnd_socklist) {
+ if (peer != NULL) {
+ rc = 0;
+ ksocknal_push_peer (peer);
+ ksocknal_peer_decref(peer);
+ }
+ }
- conn = list_entry(tmp, ksock_conn_t, ksnc_list);
+ }
- if (conn->ksnc_peernid == nid) {
- /* caller is referencing */
- atomic_inc (&conn->ksnc_refcount);
+ return (rc);
+}
+
+int
+ksocknal_add_interface(lnet_ni_t *ni, __u32 ipaddress, __u32 netmask)
+{
+ ksock_net_t *net = ni->ni_data;
+ ksock_interface_t *iface;
+ int rc;
+ int i;
+ int j;
+ struct list_head *ptmp;
+ ksock_peer_t *peer;
+ struct list_head *rtmp;
+ ksock_route_t *route;
+
+ if (ipaddress == 0 ||
+ netmask == 0)
+ return (-EINVAL);
+
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
+
+ iface = ksocknal_ip2iface(ni, ipaddress);
+ if (iface != NULL) {
+ /* silently ignore dups */
+ rc = 0;
+ } else if (net->ksnn_ninterfaces == LNET_MAX_INTERFACES) {
+ rc = -ENOSPC;
+ } else {
+ iface = &net->ksnn_interfaces[net->ksnn_ninterfaces++];
+
+ iface->ksni_ipaddr = ipaddress;
+ iface->ksni_netmask = netmask;
+ iface->ksni_nroutes = 0;
+ iface->ksni_npeers = 0;
+
+ for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
+ list_for_each(ptmp, &ksocknal_data.ksnd_peers[i]) {
+ peer = list_entry(ptmp, ksock_peer_t, ksnp_list);
- read_unlock (&ksocknal_data.ksnd_socklist_lock);
+ for (j = 0; i < peer->ksnp_n_passive_ips; j++)
+ if (peer->ksnp_passive_ips[j] == ipaddress)
+ iface->ksni_npeers++;
- CDEBUG(D_NET, "got conn [%p] -> "LPX64" (%d)\n",
- conn, nid, atomic_read (&conn->ksnc_refcount));
+ list_for_each(rtmp, &peer->ksnp_routes) {
+ route = list_entry(rtmp, ksock_route_t, ksnr_list);
- PROF_FINISH(conn_list_walk);
- return (conn);
+ if (route->ksnr_myipaddr == ipaddress)
+ iface->ksni_nroutes++;
+ }
+ }
}
+
+ rc = 0;
+ /* NB only new connections will pay attention to the new interface! */
}
- read_unlock (&ksocknal_data.ksnd_socklist_lock);
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
- CDEBUG(D_NET, "No connection found when looking for nid "LPX64"\n",
- nid);
- PROF_FINISH(conn_list_walk);
- return (NULL);
+ return (rc);
}
void
-ksocknal_close_conn (ksock_conn_t *conn)
+ksocknal_peer_del_interface_locked(ksock_peer_t *peer, __u32 ipaddr)
{
- CDEBUG (D_NET, "connection [%p] closed \n", conn);
+ struct list_head *tmp;
+ struct list_head *nxt;
+ ksock_route_t *route;
+ ksock_conn_t *conn;
+ int i;
+ int j;
+
+ for (i = 0; i < peer->ksnp_n_passive_ips; i++)
+ if (peer->ksnp_passive_ips[i] == ipaddr) {
+ for (j = i+1; j < peer->ksnp_n_passive_ips; j++)
+ peer->ksnp_passive_ips[j-1] =
+ peer->ksnp_passive_ips[j];
+ peer->ksnp_n_passive_ips--;
+ break;
+ }
- fput (conn->ksnc_file);
- PORTAL_FREE (conn, sizeof (*conn));
+ list_for_each_safe(tmp, nxt, &peer->ksnp_routes) {
+ route = list_entry (tmp, ksock_route_t, ksnr_list);
- /* One less connection keeping us hanging on */
- PORTAL_MODULE_UNUSE;
+ if (route->ksnr_myipaddr != ipaddr)
+ continue;
+
+ if (route->ksnr_share_count != 0) {
+ /* Manually created; keep, but unbind */
+ route->ksnr_myipaddr = 0;
+ } else {
+ ksocknal_del_route_locked(route);
+ }
+ }
+
+ list_for_each_safe(tmp, nxt, &peer->ksnp_conns) {
+ conn = list_entry(tmp, ksock_conn_t, ksnc_list);
+
+ if (conn->ksnc_myipaddr == ipaddr)
+ ksocknal_close_conn_locked (conn, 0);
+ }
}
-void
-_ksocknal_put_conn (ksock_conn_t *conn)
+int
+ksocknal_del_interface(lnet_ni_t *ni, __u32 ipaddress)
{
- unsigned long flags;
+ ksock_net_t *net = ni->ni_data;
+ int rc = -ENOENT;
+ struct list_head *tmp;
+ struct list_head *nxt;
+ ksock_peer_t *peer;
+ __u32 this_ip;
+ int i;
+ int j;
- CDEBUG (D_NET, "connection [%p] handed the black spot\n", conn);
+ write_lock_bh (&ksocknal_data.ksnd_global_lock);
- /* "But what is the black spot, captain?" I asked.
- * "That's a summons, mate..." */
+ for (i = 0; i < net->ksnn_ninterfaces; i++) {
+ this_ip = net->ksnn_interfaces[i].ksni_ipaddr;
- LASSERT (atomic_read (&conn->ksnc_refcount) == 0);
- LASSERT (conn->ksnc_sock->sk->data_ready != ksocknal_data_ready);
- LASSERT (conn->ksnc_sock->sk->write_space != ksocknal_write_space);
- LASSERT (conn->ksnc_sock->sk->user_data == NULL);
- LASSERT (!conn->ksnc_rx_scheduled);
+ if (!(ipaddress == 0 ||
+ ipaddress == this_ip))
+ continue;
- if (!in_interrupt()) {
- ksocknal_close_conn (conn);
- return;
- }
+ rc = 0;
+
+ for (j = i+1; j < net->ksnn_ninterfaces; j++)
+ net->ksnn_interfaces[j-1] =
+ net->ksnn_interfaces[j];
+
+ net->ksnn_ninterfaces--;
+
+ for (j = 0; j < ksocknal_data.ksnd_peer_hash_size; j++) {
+ list_for_each_safe(tmp, nxt, &ksocknal_data.ksnd_peers[j]) {
+ peer = list_entry(tmp, ksock_peer_t, ksnp_list);
- spin_lock_irqsave (&ksocknal_data.ksnd_reaper_lock, flags);
+ if (peer->ksnp_ni != ni)
+ continue;
- list_add (&conn->ksnc_list, &ksocknal_data.ksnd_reaper_list);
- wake_up (&ksocknal_data.ksnd_reaper_waitq);
+ ksocknal_peer_del_interface_locked(peer, this_ip);
+ }
+ }
+ }
+
+ write_unlock_bh (&ksocknal_data.ksnd_global_lock);
- spin_unlock_irqrestore (&ksocknal_data.ksnd_reaper_lock, flags);
+ return (rc);
}
int
-ksocknal_cmd(struct portal_ioctl_data * data, void * private)
+ksocknal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg)
{
- int rc = -EINVAL;
-
- LASSERT (data != NULL);
+ struct libcfs_ioctl_data *data = arg;
+ int rc;
+
+ switch(cmd) {
+ case IOC_LIBCFS_GET_INTERFACE: {
+ ksock_net_t *net = ni->ni_data;
+ ksock_interface_t *iface;
+
+ read_lock (&ksocknal_data.ksnd_global_lock);
+
+ if (data->ioc_count < 0 ||
+ data->ioc_count >= net->ksnn_ninterfaces) {
+ rc = -ENOENT;
+ } else {
+ rc = 0;
+ iface = &net->ksnn_interfaces[data->ioc_count];
+
+ data->ioc_u32[0] = iface->ksni_ipaddr;
+ data->ioc_u32[1] = iface->ksni_netmask;
+ data->ioc_u32[2] = iface->ksni_npeers;
+ data->ioc_u32[3] = iface->ksni_nroutes;
+ }
- switch(data->ioc_nal_cmd) {
- case NAL_CMD_REGISTER_PEER_FD: {
- rc = ksocknal_add_sock(data->ioc_nid, data->ioc_fd,
- data->ioc_flags);
- break;
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ return rc;
}
- case NAL_CMD_CLOSE_CONNECTION: {
- rc = ksocknal_close_sock(data->ioc_nid);
- break;
+
+ case IOC_LIBCFS_ADD_INTERFACE:
+ return ksocknal_add_interface(ni,
+ data->ioc_u32[0], /* IP address */
+ data->ioc_u32[1]); /* net mask */
+
+ case IOC_LIBCFS_DEL_INTERFACE:
+ return ksocknal_del_interface(ni,
+ data->ioc_u32[0]); /* IP address */
+
+ case IOC_LIBCFS_GET_PEER: {
+ lnet_process_id_t id = {0,};
+ __u32 myip = 0;
+ __u32 ip = 0;
+ int port = 0;
+ int conn_count = 0;
+ int share_count = 0;
+
+ rc = ksocknal_get_peer_info(ni, data->ioc_count,
+ &id, &myip, &ip, &port,
+ &conn_count, &share_count);
+ if (rc != 0)
+ return rc;
+
+ data->ioc_nid = id.nid;
+ data->ioc_count = share_count;
+ data->ioc_u32[0] = ip;
+ data->ioc_u32[1] = port;
+ data->ioc_u32[2] = myip;
+ data->ioc_u32[3] = conn_count;
+ data->ioc_u32[4] = id.pid;
+ return 0;
}
- case NAL_CMD_REGISTER_MYNID: {
- rc = ksocknal_set_mynid (data->ioc_nid);
- break;
+
+ case IOC_LIBCFS_ADD_PEER: {
+ lnet_process_id_t id = {.nid = data->ioc_nid,
+ .pid = LUSTRE_SRV_LNET_PID};
+ return ksocknal_add_peer (ni, id,
+ data->ioc_u32[0], /* IP */
+ data->ioc_u32[1]); /* port */
}
- case NAL_CMD_PUSH_CONNECTION: {
- rc = ksocknal_push_sock (data->ioc_nid);
- break;
+ case IOC_LIBCFS_DEL_PEER: {
+ lnet_process_id_t id = {.nid = data->ioc_nid,
+ .pid = LNET_PID_ANY};
+ return ksocknal_del_peer (ni, id,
+ data->ioc_u32[0]); /* IP */
}
+ case IOC_LIBCFS_GET_CONN: {
+ int txmem;
+ int rxmem;
+ int nagle;
+ ksock_conn_t *conn = ksocknal_get_conn_by_idx (ni, data->ioc_count);
+
+ if (conn == NULL)
+ return -ENOENT;
+
+ ksocknal_lib_get_conn_tunables(conn, &txmem, &rxmem, &nagle);
+
+ data->ioc_count = txmem;
+ data->ioc_nid = conn->ksnc_peer->ksnp_id.nid;
+ data->ioc_flags = nagle;
+ data->ioc_u32[0] = conn->ksnc_ipaddr;
+ data->ioc_u32[1] = conn->ksnc_port;
+ data->ioc_u32[2] = conn->ksnc_myipaddr;
+ data->ioc_u32[3] = conn->ksnc_type;
+ data->ioc_u32[4] = conn->ksnc_scheduler -
+ ksocknal_data.ksnd_schedulers;
+ data->ioc_u32[5] = rxmem;
+ data->ioc_u32[6] = conn->ksnc_peer->ksnp_id.pid;
+ ksocknal_conn_decref(conn);
+ return 0;
}
- return rc;
+ case IOC_LIBCFS_CLOSE_CONNECTION: {
+ lnet_process_id_t id = {.nid = data->ioc_nid,
+ .pid = LNET_PID_ANY};
+
+ return ksocknal_close_matching_conns (id,
+ data->ioc_u32[0]);
+ }
+ case IOC_LIBCFS_REGISTER_MYNID:
+ /* Ignore if this is a noop */
+ if (data->ioc_nid == ni->ni_nid)
+ return 0;
+
+ CERROR("obsolete IOC_LIBCFS_REGISTER_MYNID: %s(%s)\n",
+ libcfs_nid2str(data->ioc_nid),
+ libcfs_nid2str(ni->ni_nid));
+ return -EINVAL;
+
+ case IOC_LIBCFS_PUSH_CONNECTION: {
+ lnet_process_id_t id = {.nid = data->ioc_nid,
+ .pid = LNET_PID_ANY};
+
+ return ksocknal_push(ni, id);
+ }
+ default:
+ return -EINVAL;
+ }
+ /* not reached */
}
void
ksocknal_free_buffers (void)
{
- if (ksocknal_data.ksnd_fmbs != NULL) {
- ksock_fmb_t *fmb = (ksock_fmb_t *)ksocknal_data.ksnd_fmbs;
- int i;
- int j;
+ LASSERT (atomic_read(&ksocknal_data.ksnd_nactive_txs) == 0);
- for (i = 0;
- i < (SOCKNAL_SMALL_FWD_NMSGS + SOCKNAL_LARGE_FWD_NMSGS);
- i++, fmb++)
- for (j = 0; j < fmb->fmb_npages; j++)
- if (fmb->fmb_pages[j] != NULL)
- __free_page (fmb->fmb_pages[j]);
+ if (ksocknal_data.ksnd_schedulers != NULL)
+ LIBCFS_FREE (ksocknal_data.ksnd_schedulers,
+ sizeof (ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
- PORTAL_FREE (ksocknal_data.ksnd_fmbs,
- sizeof (ksock_fmb_t) * (SOCKNAL_SMALL_FWD_NMSGS +
- SOCKNAL_LARGE_FWD_NMSGS));
- }
+ LIBCFS_FREE (ksocknal_data.ksnd_peers,
+ sizeof (struct list_head) *
+ ksocknal_data.ksnd_peer_hash_size);
- if (ksocknal_data.ksnd_ltxs != NULL)
- PORTAL_FREE (ksocknal_data.ksnd_ltxs,
- sizeof (ksock_ltx_t) * (SOCKNAL_NLTXS +
- SOCKNAL_NNBLK_LTXS));
+ spin_lock(&ksocknal_data.ksnd_tx_lock);
- if (ksocknal_data.ksnd_schedulers != NULL)
- PORTAL_FREE (ksocknal_data.ksnd_schedulers,
- sizeof (ksock_sched_t) * SOCKNAL_N_SCHED);
+ if (!list_empty(&ksocknal_data.ksnd_idle_noop_txs)) {
+ struct list_head zlist;
+ ksock_tx_t *tx;
+
+ list_add(&zlist, &ksocknal_data.ksnd_idle_noop_txs);
+ list_del_init(&ksocknal_data.ksnd_idle_noop_txs);
+ spin_unlock(&ksocknal_data.ksnd_tx_lock);
+
+ while(!list_empty(&zlist)) {
+ tx = list_entry(zlist.next, ksock_tx_t, tx_list);
+ list_del(&tx->tx_list);
+ LIBCFS_FREE(tx, tx->tx_desc_size);
+ }
+ } else {
+ spin_unlock(&ksocknal_data.ksnd_tx_lock);
+ }
}
-void __exit
-ksocknal_module_fini (void)
+void
+ksocknal_base_shutdown (void)
{
- int i;
+ ksock_sched_t *sched;
+ int i;
CDEBUG(D_MALLOC, "before NAL cleanup: kmem %d\n",
- atomic_read (&portal_kmemory));
+ atomic_read (&libcfs_kmemory));
+ LASSERT (ksocknal_data.ksnd_nnets == 0);
switch (ksocknal_data.ksnd_init) {
default:
LASSERT (0);
case SOCKNAL_INIT_ALL:
- kportal_nal_unregister(SOCKNAL);
- PORTAL_SYMBOL_UNREGISTER (ksocknal_ni);
- /* fall through */
-
- case SOCKNAL_INIT_PTL:
- PtlNIFini(ksocknal_ni);
- lib_fini(&ksocknal_lib);
- /* fall through */
-
case SOCKNAL_INIT_DATA:
- /* Module refcount only gets to zero when all connections
- * have been closed so all lists must be empty */
- LASSERT (list_empty (&ksocknal_data.ksnd_socklist));
- LASSERT (list_empty (&ksocknal_data.ksnd_reaper_list));
- LASSERT (list_empty (&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns));
- LASSERT (list_empty (&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns));
+ LASSERT (ksocknal_data.ksnd_peers != NULL);
+ for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++) {
+ LASSERT (list_empty (&ksocknal_data.ksnd_peers[i]));
+ }
+ LASSERT (list_empty (&ksocknal_data.ksnd_enomem_conns));
+ LASSERT (list_empty (&ksocknal_data.ksnd_zombie_conns));
+ LASSERT (list_empty (&ksocknal_data.ksnd_connd_connreqs));
+ LASSERT (list_empty (&ksocknal_data.ksnd_connd_routes));
if (ksocknal_data.ksnd_schedulers != NULL)
- for (i = 0; i < SOCKNAL_N_SCHED; i++) {
+ for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
ksock_sched_t *kss =
&ksocknal_data.ksnd_schedulers[i];
LASSERT (list_empty (&kss->kss_tx_conns));
LASSERT (list_empty (&kss->kss_rx_conns));
+ LASSERT (list_empty (&kss->kss_zombie_noop_txs));
LASSERT (kss->kss_nconns == 0);
}
- /* stop router calling me */
- kpr_shutdown (&ksocknal_data.ksnd_router);
-
/* flag threads to terminate; wake and wait for them to die */
ksocknal_data.ksnd_shuttingdown = 1;
- wake_up_all (&ksocknal_data.ksnd_reaper_waitq);
+ cfs_waitq_broadcast (&ksocknal_data.ksnd_connd_waitq);
+ cfs_waitq_broadcast (&ksocknal_data.ksnd_reaper_waitq);
- for (i = 0; i < SOCKNAL_N_SCHED; i++)
- wake_up_all(&ksocknal_data.ksnd_schedulers[i].kss_waitq);
+ if (ksocknal_data.ksnd_schedulers != NULL)
+ for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
+ sched = &ksocknal_data.ksnd_schedulers[i];
+ cfs_waitq_broadcast(&sched->kss_waitq);
+ }
- while (atomic_read (&ksocknal_data.ksnd_nthreads) != 0) {
- CDEBUG (D_NET, "waitinf for %d threads to terminate\n",
- atomic_read (&ksocknal_data.ksnd_nthreads));
- set_current_state (TASK_UNINTERRUPTIBLE);
- schedule_timeout (HZ);
+ i = 4;
+ read_lock (&ksocknal_data.ksnd_global_lock);
+ while (ksocknal_data.ksnd_nthreads != 0) {
+ i++;
+ CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
+ "waiting for %d threads to terminate\n",
+ ksocknal_data.ksnd_nthreads);
+ read_unlock (&ksocknal_data.ksnd_global_lock);
+ cfs_pause(cfs_time_seconds(1));
+ read_lock (&ksocknal_data.ksnd_global_lock);
}
-
- kpr_deregister (&ksocknal_data.ksnd_router);
+ read_unlock (&ksocknal_data.ksnd_global_lock);
ksocknal_free_buffers();
- /* fall through */
- case SOCKNAL_INIT_NOTHING:
+ ksocknal_data.ksnd_init = SOCKNAL_INIT_NOTHING;
break;
}
CDEBUG(D_MALLOC, "after NAL cleanup: kmem %d\n",
- atomic_read (&portal_kmemory));
+ atomic_read (&libcfs_kmemory));
- printk(KERN_INFO "Routing socket NAL unloaded (final mem %d)\n",
- atomic_read(&portal_kmemory));
+ PORTAL_MODULE_UNUSE;
}
-int __init
-ksocknal_module_init (void)
+__u64
+ksocknal_new_incarnation (void)
{
- int pkmem = atomic_read(&portal_kmemory);
- int rc;
- int i;
- int j;
+ struct timeval tv;
- /* packet descriptor must fit in a router descriptor's scratchpad */
- LASSERT(sizeof (ksock_tx_t) <= sizeof (kprfd_scratch_t));
+ /* The incarnation number is the time this module loaded and it
+ * identifies this particular instance of the socknal. Hopefully
+ * we won't be able to reboot more frequently than 1MHz for the
+ * forseeable future :) */
- LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
+ do_gettimeofday(&tv);
+
+ return (((__u64)tv.tv_sec) * 1000000) + tv.tv_usec;
+}
- ksocknal_api.forward = ksocknal_api_forward;
- ksocknal_api.shutdown = ksocknal_api_shutdown;
- ksocknal_api.yield = ksocknal_api_yield;
- ksocknal_api.validate = NULL; /* our api validate is a NOOP */
- ksocknal_api.lock = ksocknal_api_lock;
- ksocknal_api.unlock = ksocknal_api_unlock;
- ksocknal_api.nal_data = &ksocknal_data;
+int
+ksocknal_base_startup (void)
+{
+ int rc;
+ int i;
- ksocknal_lib.nal_data = &ksocknal_data;
+ LASSERT (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING);
+ LASSERT (ksocknal_data.ksnd_nnets == 0);
memset (&ksocknal_data, 0, sizeof (ksocknal_data)); /* zero pointers */
- INIT_LIST_HEAD(&ksocknal_data.ksnd_socklist);
- rwlock_init(&ksocknal_data.ksnd_socklist_lock);
+ ksocknal_data.ksnd_peer_hash_size = SOCKNAL_PEER_HASH_SIZE;
+ LIBCFS_ALLOC (ksocknal_data.ksnd_peers,
+ sizeof (struct list_head) * ksocknal_data.ksnd_peer_hash_size);
+ if (ksocknal_data.ksnd_peers == NULL)
+ return -ENOMEM;
- ksocknal_data.ksnd_nal_cb = &ksocknal_lib;
- spin_lock_init (&ksocknal_data.ksnd_nal_cb_lock);
+ for (i = 0; i < ksocknal_data.ksnd_peer_hash_size; i++)
+ CFS_INIT_LIST_HEAD(&ksocknal_data.ksnd_peers[i]);
- spin_lock_init(&ksocknal_data.ksnd_small_fmp.fmp_lock);
- INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_idle_fmbs);
- INIT_LIST_HEAD(&ksocknal_data.ksnd_small_fmp.fmp_blocked_conns);
+ rwlock_init(&ksocknal_data.ksnd_global_lock);
- spin_lock_init(&ksocknal_data.ksnd_large_fmp.fmp_lock);
- INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_idle_fmbs);
- INIT_LIST_HEAD(&ksocknal_data.ksnd_large_fmp.fmp_blocked_conns);
+ spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
+ CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_enomem_conns);
+ CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_zombie_conns);
+ CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_deathrow_conns);
+ cfs_waitq_init(&ksocknal_data.ksnd_reaper_waitq);
- spin_lock_init(&ksocknal_data.ksnd_idle_ltx_lock);
- INIT_LIST_HEAD(&ksocknal_data.ksnd_idle_nblk_ltx_list);
- INIT_LIST_HEAD(&ksocknal_data.ksnd_idle_ltx_list);
- init_waitqueue_head(&ksocknal_data.ksnd_idle_ltx_waitq);
+ spin_lock_init (&ksocknal_data.ksnd_connd_lock);
+ CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_connreqs);
+ CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_connd_routes);
+ cfs_waitq_init(&ksocknal_data.ksnd_connd_waitq);
- spin_lock_init (&ksocknal_data.ksnd_reaper_lock);
- INIT_LIST_HEAD (&ksocknal_data.ksnd_reaper_list);
- init_waitqueue_head(&ksocknal_data.ksnd_reaper_waitq);
+ spin_lock_init (&ksocknal_data.ksnd_tx_lock);
+ CFS_INIT_LIST_HEAD (&ksocknal_data.ksnd_idle_noop_txs);
- memset (&ksocknal_data.ksnd_irq_info, SOCKNAL_IRQ_UNASSIGNED,
- sizeof (ksocknal_data.ksnd_irq_info));
+ /* NB memset above zeros whole of ksocknal_data, including
+ * ksocknal_data.ksnd_irqinfo[all].ksni_valid */
/* flag lists/ptrs/locks initialised */
ksocknal_data.ksnd_init = SOCKNAL_INIT_DATA;
+ PORTAL_MODULE_USE;
- PORTAL_ALLOC(ksocknal_data.ksnd_schedulers,
- sizeof(ksock_sched_t) * SOCKNAL_N_SCHED);
+ ksocknal_data.ksnd_nschedulers = ksocknal_nsched();
+ LIBCFS_ALLOC(ksocknal_data.ksnd_schedulers,
+ sizeof(ksock_sched_t) * ksocknal_data.ksnd_nschedulers);
if (ksocknal_data.ksnd_schedulers == NULL)
- RETURN(-ENOMEM);
+ goto failed;
- for (i = 0; i < SOCKNAL_N_SCHED; i++) {
+ for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
ksock_sched_t *kss = &ksocknal_data.ksnd_schedulers[i];
spin_lock_init (&kss->kss_lock);
- INIT_LIST_HEAD (&kss->kss_rx_conns);
- INIT_LIST_HEAD (&kss->kss_tx_conns);
-#if SOCKNAL_ZC
- INIT_LIST_HEAD (&kss->kss_zctxdone_list);
-#endif
- init_waitqueue_head (&kss->kss_waitq);
+ CFS_INIT_LIST_HEAD (&kss->kss_rx_conns);
+ CFS_INIT_LIST_HEAD (&kss->kss_tx_conns);
+ CFS_INIT_LIST_HEAD (&kss->kss_zombie_noop_txs);
+ cfs_waitq_init (&kss->kss_waitq);
}
- CERROR ("ltx "LPSZ", total "LPSZ"\n", sizeof (ksock_ltx_t),
- sizeof (ksock_ltx_t) * (SOCKNAL_NLTXS + SOCKNAL_NNBLK_LTXS));
+ for (i = 0; i < ksocknal_data.ksnd_nschedulers; i++) {
+ rc = ksocknal_thread_start (ksocknal_scheduler,
+ &ksocknal_data.ksnd_schedulers[i]);
+ if (rc != 0) {
+ CERROR("Can't spawn socknal scheduler[%d]: %d\n",
+ i, rc);
+ goto failed;
+ }
+ }
- PORTAL_ALLOC(ksocknal_data.ksnd_ltxs,
- sizeof(ksock_ltx_t) * (SOCKNAL_NLTXS +SOCKNAL_NNBLK_LTXS));
- if (ksocknal_data.ksnd_ltxs == NULL) {
- ksocknal_module_fini ();
- return (-ENOMEM);
+ /* must have at least 2 connds to remain responsive to accepts while
+ * connecting */
+ if (*ksocknal_tunables.ksnd_nconnds < 2)
+ *ksocknal_tunables.ksnd_nconnds = 2;
+
+ for (i = 0; i < *ksocknal_tunables.ksnd_nconnds; i++) {
+ rc = ksocknal_thread_start (ksocknal_connd, (void *)((long)i));
+ if (rc != 0) {
+ CERROR("Can't spawn socknal connd: %d\n", rc);
+ goto failed;
+ }
}
- /* Deterministic bugs please */
- memset (ksocknal_data.ksnd_ltxs, 0xeb,
- sizeof (ksock_ltx_t) * (SOCKNAL_NLTXS + SOCKNAL_NNBLK_LTXS));
+ rc = ksocknal_thread_start (ksocknal_reaper, NULL);
+ if (rc != 0) {
+ CERROR ("Can't spawn socknal reaper: %d\n", rc);
+ goto failed;
+ }
+
+ /* flag everything initialised */
+ ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
- for (i = 0; i < SOCKNAL_NLTXS + SOCKNAL_NNBLK_LTXS; i++) {
- ksock_ltx_t *ltx = &((ksock_ltx_t *)ksocknal_data.ksnd_ltxs)[i];
+ return 0;
+
+ failed:
+ ksocknal_base_shutdown();
+ return -ENETDOWN;
+}
- ltx->ltx_idle = i < SOCKNAL_NLTXS ?
- &ksocknal_data.ksnd_idle_ltx_list :
- &ksocknal_data.ksnd_idle_nblk_ltx_list;
- list_add (<x->ltx_tx.tx_list, ltx->ltx_idle);
+void
+ksocknal_shutdown (lnet_ni_t *ni)
+{
+ ksock_net_t *net = ni->ni_data;
+ int i;
+ lnet_process_id_t anyid = {.nid = LNET_NID_ANY,
+ .pid = LNET_PID_ANY};
+
+ LASSERT(ksocknal_data.ksnd_init == SOCKNAL_INIT_ALL);
+ LASSERT(ksocknal_data.ksnd_nnets > 0);
+
+ spin_lock_bh (&net->ksnn_lock);
+ net->ksnn_shutdown = 1; /* prevent new peers */
+ spin_unlock_bh (&net->ksnn_lock);
+
+ /* Delete all peers */
+ ksocknal_del_peer(ni, anyid, 0);
+
+ /* Wait for all peer state to clean up */
+ i = 2;
+ spin_lock_bh (&net->ksnn_lock);
+ while (net->ksnn_npeers != 0) {
+ spin_unlock_bh (&net->ksnn_lock);
+
+ i++;
+ CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
+ "waiting for %d peers to disconnect\n",
+ net->ksnn_npeers);
+ cfs_pause(cfs_time_seconds(1));
+
+ spin_lock_bh (&net->ksnn_lock);
}
+ spin_unlock_bh (&net->ksnn_lock);
- rc = PtlNIInit(ksocknal_init, 32, 4, 0, &ksocknal_ni);
- if (rc != 0) {
- CERROR("ksocknal: PtlNIInit failed: error %d\n", rc);
- ksocknal_module_fini ();
- RETURN (rc);
+ for (i = 0; i < net->ksnn_ninterfaces; i++) {
+ LASSERT (net->ksnn_interfaces[i].ksni_npeers == 0);
+ LASSERT (net->ksnn_interfaces[i].ksni_nroutes == 0);
}
- PtlNIDebug(ksocknal_ni, ~0);
- ksocknal_data.ksnd_init = SOCKNAL_INIT_PTL; // flag PtlNIInit() called
+ LIBCFS_FREE(net, sizeof(*net));
+
+ ksocknal_data.ksnd_nnets--;
+ if (ksocknal_data.ksnd_nnets == 0)
+ ksocknal_base_shutdown();
+}
- for (i = 0; i < SOCKNAL_N_SCHED; i++) {
- rc = ksocknal_thread_start (ksocknal_scheduler,
- &ksocknal_data.ksnd_schedulers[i]);
+int
+ksocknal_enumerate_interfaces(ksock_net_t *net)
+{
+ char **names;
+ int i;
+ int j;
+ int rc;
+ int n;
+
+ n = libcfs_ipif_enumerate(&names);
+ if (n <= 0) {
+ CERROR("Can't enumerate interfaces: %d\n", n);
+ return n;
+ }
+
+ for (i = j = 0; i < n; i++) {
+ int up;
+ __u32 ip;
+ __u32 mask;
+
+ if (!strcmp(names[i], "lo")) /* skip the loopback IF */
+ continue;
+
+ rc = libcfs_ipif_query(names[i], &up, &ip, &mask);
if (rc != 0) {
- CERROR("Can't spawn socknal scheduler[%d]: %d\n",
- i, rc);
- ksocknal_module_fini ();
- RETURN (rc);
+ CWARN("Can't get interface %s info: %d\n",
+ names[i], rc);
+ continue;
+ }
+
+ if (!up) {
+ CWARN("Ignoring interface %s (down)\n",
+ names[i]);
+ continue;
}
- }
- rc = ksocknal_thread_start (ksocknal_reaper, NULL);
- if (rc != 0) {
- CERROR("Can't spawn socknal reaper: %d\n", rc);
- ksocknal_module_fini ();
- RETURN (rc);
+ if (j == LNET_MAX_INTERFACES) {
+ CWARN("Ignoring interface %s (too many interfaces)\n",
+ names[i]);
+ continue;
+ }
+
+ net->ksnn_interfaces[j].ksni_ipaddr = ip;
+ net->ksnn_interfaces[j].ksni_netmask = mask;
+ j++;
}
- rc = kpr_register(&ksocknal_data.ksnd_router,
- &ksocknal_router_interface);
- if (rc != 0) {
- CDEBUG(D_NET, "Can't initialise routing interface "
- "(rc = %d): not routing\n", rc);
- } else {
- /* Only allocate forwarding buffers if I'm on a gateway */
-
- PORTAL_ALLOC(ksocknal_data.ksnd_fmbs,
- sizeof(ksock_fmb_t) * (SOCKNAL_SMALL_FWD_NMSGS +
- SOCKNAL_LARGE_FWD_NMSGS));
- if (ksocknal_data.ksnd_fmbs == NULL) {
- ksocknal_module_fini ();
- RETURN(-ENOMEM);
- }
-
- /* NULL out buffer pointers etc */
- memset(ksocknal_data.ksnd_fmbs, 0,
- sizeof(ksock_fmb_t) * (SOCKNAL_SMALL_FWD_NMSGS +
- SOCKNAL_LARGE_FWD_NMSGS));
-
- for (i = 0; i < (SOCKNAL_SMALL_FWD_NMSGS +
- SOCKNAL_LARGE_FWD_NMSGS); i++) {
- ksock_fmb_t *fmb =
- &((ksock_fmb_t *)ksocknal_data.ksnd_fmbs)[i];
-
- if (i < SOCKNAL_SMALL_FWD_NMSGS) {
- fmb->fmb_npages = SOCKNAL_SMALL_FWD_PAGES;
- fmb->fmb_pool = &ksocknal_data.ksnd_small_fmp;
- } else {
- fmb->fmb_npages = SOCKNAL_LARGE_FWD_PAGES;
- fmb->fmb_pool = &ksocknal_data.ksnd_large_fmp;
- }
+ libcfs_ipif_free_enumeration(names, n);
+
+ if (j == 0)
+ CERROR("Can't find any usable interfaces\n");
+
+ return j;
+}
- LASSERT (fmb->fmb_npages > 0);
- for (j = 0; j < fmb->fmb_npages; j++) {
- fmb->fmb_pages[j] = alloc_page(GFP_KERNEL);
+int
+ksocknal_startup (lnet_ni_t *ni)
+{
+ ksock_net_t *net;
+ int rc;
+ int i;
- if (fmb->fmb_pages[j] == NULL) {
- ksocknal_module_fini ();
- return (-ENOMEM);
- }
+ LASSERT (ni->ni_lnd == &the_ksocklnd);
- LASSERT(page_address (fmb->fmb_pages[j]) !=
- NULL);
- }
+ if (ksocknal_data.ksnd_init == SOCKNAL_INIT_NOTHING) {
+ rc = ksocknal_base_startup();
+ if (rc != 0)
+ return rc;
+ }
+
+ LIBCFS_ALLOC(net, sizeof(*net));
+ if (net == NULL)
+ goto fail_0;
+
+ memset(net, 0, sizeof(*net));
+ spin_lock_init(&net->ksnn_lock);
+ net->ksnn_incarnation = ksocknal_new_incarnation();
+ ni->ni_data = net;
+ ni->ni_maxtxcredits = *ksocknal_tunables.ksnd_credits;
+ ni->ni_peertxcredits = *ksocknal_tunables.ksnd_peercredits;
+
+ if (ni->ni_interfaces[0] == NULL) {
+ rc = ksocknal_enumerate_interfaces(net);
+ if (rc <= 0)
+ goto fail_1;
+
+ net->ksnn_ninterfaces = 1;
+ } else {
+ for (i = 0; i < LNET_MAX_INTERFACES; i++) {
+ int up;
+
+ if (ni->ni_interfaces[i] == NULL)
+ break;
- list_add(&fmb->fmb_list, &fmb->fmb_pool->fmp_idle_fmbs);
+ rc = libcfs_ipif_query(
+ ni->ni_interfaces[i], &up,
+ &net->ksnn_interfaces[i].ksni_ipaddr,
+ &net->ksnn_interfaces[i].ksni_netmask);
+
+ if (rc != 0) {
+ CERROR("Can't get interface %s info: %d\n",
+ ni->ni_interfaces[i], rc);
+ goto fail_1;
+ }
+
+ if (!up) {
+ CERROR("Interface %s is down\n",
+ ni->ni_interfaces[i]);
+ goto fail_1;
+ }
}
+ net->ksnn_ninterfaces = i;
}
- rc = kportal_nal_register(SOCKNAL, &ksocknal_cmd, NULL);
- if (rc != 0) {
- CERROR ("Can't initialise command interface (rc = %d)\n", rc);
- ksocknal_module_fini ();
- return (rc);
- }
+ ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid),
+ net->ksnn_interfaces[0].ksni_ipaddr);
- PORTAL_SYMBOL_REGISTER(ksocknal_ni);
+ ksocknal_data.ksnd_nnets++;
- /* flag everything initialised */
- ksocknal_data.ksnd_init = SOCKNAL_INIT_ALL;
+ return 0;
+
+ fail_1:
+ LIBCFS_FREE(net, sizeof(*net));
+ fail_0:
+ if (ksocknal_data.ksnd_nnets == 0)
+ ksocknal_base_shutdown();
+
+ return -ENETDOWN;
+}
- printk(KERN_INFO "Routing socket NAL loaded (Routing %s, initial "
- "mem %d)\n",
- kpr_routing (&ksocknal_data.ksnd_router) ?
- "enabled" : "disabled", pkmem);
- return (0);
+void __exit
+ksocknal_module_fini (void)
+{
+ lnet_unregister_lnd(&the_ksocklnd);
+ ksocknal_lib_tunables_fini();
+}
+
+int __init
+ksocknal_module_init (void)
+{
+ int rc;
+
+ /* check ksnr_connected/connecting field large enough */
+ CLASSERT(SOCKLND_CONN_NTYPES <= 4);
+
+ rc = ksocknal_lib_tunables_init();
+ if (rc != 0)
+ return rc;
+
+ lnet_register_lnd(&the_ksocklnd);
+
+ return 0;
}
MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Kernel TCP Socket NAL v0.01");
+MODULE_DESCRIPTION("Kernel TCP Socket LND v2.0.0");
MODULE_LICENSE("GPL");
-module_init(ksocknal_module_init);
-module_exit(ksocknal_module_fini);
-
-EXPORT_SYMBOL (ksocknal_ni);
+cfs_module(ksocknal, "2.0.0", ksocknal_module_init, ksocknal_module_fini);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff