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Diffstat (limited to 'drivers/staging/lustre/lnet/lnet/acceptor.c')
-rw-r--r--drivers/staging/lustre/lnet/lnet/acceptor.c501
1 files changed, 0 insertions, 501 deletions
diff --git a/drivers/staging/lustre/lnet/lnet/acceptor.c b/drivers/staging/lustre/lnet/lnet/acceptor.c
deleted file mode 100644
index 5648f17eddc0..000000000000
--- a/drivers/staging/lustre/lnet/lnet/acceptor.c
+++ /dev/null
@@ -1,501 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program 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 version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2015, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-
-#define DEBUG_SUBSYSTEM S_LNET
-#include <linux/completion.h>
-#include <net/sock.h>
-#include <linux/lnet/lib-lnet.h>
-
-static int accept_port = 988;
-static int accept_backlog = 127;
-static int accept_timeout = 5;
-
-static struct {
- int pta_shutdown;
- struct socket *pta_sock;
- struct completion pta_signal;
-} lnet_acceptor_state = {
- .pta_shutdown = 1
-};
-
-int
-lnet_acceptor_port(void)
-{
- return accept_port;
-}
-EXPORT_SYMBOL(lnet_acceptor_port);
-
-static inline int
-lnet_accept_magic(__u32 magic, __u32 constant)
-{
- return (magic == constant ||
- magic == __swab32(constant));
-}
-
-static char *accept = "secure";
-
-module_param(accept, charp, 0444);
-MODULE_PARM_DESC(accept, "Accept connections (secure|all|none)");
-module_param(accept_port, int, 0444);
-MODULE_PARM_DESC(accept_port, "Acceptor's port (same on all nodes)");
-module_param(accept_backlog, int, 0444);
-MODULE_PARM_DESC(accept_backlog, "Acceptor's listen backlog");
-module_param(accept_timeout, int, 0644);
-MODULE_PARM_DESC(accept_timeout, "Acceptor's timeout (seconds)");
-
-static char *accept_type;
-
-static int
-lnet_acceptor_get_tunables(void)
-{
- /*
- * Userland acceptor uses 'accept_type' instead of 'accept', due to
- * conflict with 'accept(2)', but kernel acceptor still uses 'accept'
- * for compatibility. Hence the trick.
- */
- accept_type = accept;
- return 0;
-}
-
-int
-lnet_acceptor_timeout(void)
-{
- return accept_timeout;
-}
-EXPORT_SYMBOL(lnet_acceptor_timeout);
-
-void
-lnet_connect_console_error(int rc, lnet_nid_t peer_nid,
- __u32 peer_ip, int peer_port)
-{
- switch (rc) {
- /* "normal" errors */
- case -ECONNREFUSED:
- CNETERR("Connection to %s at host %pI4h on port %d was refused: check that Lustre is running on that node.\n",
- libcfs_nid2str(peer_nid),
- &peer_ip, peer_port);
- break;
- case -EHOSTUNREACH:
- case -ENETUNREACH:
- CNETERR("Connection to %s at host %pI4h was unreachable: the network or that node may be down, or Lustre may be misconfigured.\n",
- libcfs_nid2str(peer_nid), &peer_ip);
- break;
- case -ETIMEDOUT:
- CNETERR("Connection to %s at host %pI4h on port %d took too long: that node may be hung or experiencing high load.\n",
- libcfs_nid2str(peer_nid),
- &peer_ip, peer_port);
- break;
- case -ECONNRESET:
- LCONSOLE_ERROR_MSG(0x11b, "Connection to %s at host %pI4h on port %d was reset: is it running a compatible version of Lustre and is %s one of its NIDs?\n",
- libcfs_nid2str(peer_nid),
- &peer_ip, peer_port,
- libcfs_nid2str(peer_nid));
- break;
- case -EPROTO:
- LCONSOLE_ERROR_MSG(0x11c, "Protocol error connecting to %s at host %pI4h on port %d: is it running a compatible version of Lustre?\n",
- libcfs_nid2str(peer_nid),
- &peer_ip, peer_port);
- break;
- case -EADDRINUSE:
- LCONSOLE_ERROR_MSG(0x11d, "No privileged ports available to connect to %s at host %pI4h on port %d\n",
- libcfs_nid2str(peer_nid),
- &peer_ip, peer_port);
- break;
- default:
- LCONSOLE_ERROR_MSG(0x11e, "Unexpected error %d connecting to %s at host %pI4h on port %d\n",
- rc, libcfs_nid2str(peer_nid),
- &peer_ip, peer_port);
- break;
- }
-}
-EXPORT_SYMBOL(lnet_connect_console_error);
-
-int
-lnet_connect(struct socket **sockp, lnet_nid_t peer_nid,
- __u32 local_ip, __u32 peer_ip, int peer_port)
-{
- struct lnet_acceptor_connreq cr;
- struct socket *sock;
- int rc;
- int port;
- int fatal;
-
- BUILD_BUG_ON(sizeof(cr) > 16); /* too big to be on the stack */
-
- for (port = LNET_ACCEPTOR_MAX_RESERVED_PORT;
- port >= LNET_ACCEPTOR_MIN_RESERVED_PORT;
- --port) {
- /* Iterate through reserved ports. */
-
- rc = lnet_sock_connect(&sock, &fatal, local_ip, port, peer_ip,
- peer_port);
- if (rc) {
- if (fatal)
- goto failed;
- continue;
- }
-
- BUILD_BUG_ON(LNET_PROTO_ACCEPTOR_VERSION != 1);
-
- cr.acr_magic = LNET_PROTO_ACCEPTOR_MAGIC;
- cr.acr_version = LNET_PROTO_ACCEPTOR_VERSION;
- cr.acr_nid = peer_nid;
-
- if (the_lnet.ln_testprotocompat) {
- /* single-shot proto check */
- lnet_net_lock(LNET_LOCK_EX);
- if (the_lnet.ln_testprotocompat & 4) {
- cr.acr_version++;
- the_lnet.ln_testprotocompat &= ~4;
- }
- if (the_lnet.ln_testprotocompat & 8) {
- cr.acr_magic = LNET_PROTO_MAGIC;
- the_lnet.ln_testprotocompat &= ~8;
- }
- lnet_net_unlock(LNET_LOCK_EX);
- }
-
- rc = lnet_sock_write(sock, &cr, sizeof(cr), accept_timeout);
- if (rc)
- goto failed_sock;
-
- *sockp = sock;
- return 0;
- }
-
- rc = -EADDRINUSE;
- goto failed;
-
- failed_sock:
- sock_release(sock);
- failed:
- lnet_connect_console_error(rc, peer_nid, peer_ip, peer_port);
- return rc;
-}
-EXPORT_SYMBOL(lnet_connect);
-
-static int
-lnet_accept(struct socket *sock, __u32 magic)
-{
- struct lnet_acceptor_connreq cr;
- __u32 peer_ip;
- int peer_port;
- int rc;
- int flip;
- struct lnet_ni *ni;
- char *str;
-
- LASSERT(sizeof(cr) <= 16); /* not too big for the stack */
-
- rc = lnet_sock_getaddr(sock, 1, &peer_ip, &peer_port);
- LASSERT(!rc); /* we succeeded before */
-
- if (!lnet_accept_magic(magic, LNET_PROTO_ACCEPTOR_MAGIC)) {
- if (lnet_accept_magic(magic, LNET_PROTO_MAGIC)) {
- /*
- * future version compatibility!
- * When LNET unifies protocols over all LNDs, the first
- * thing sent will be a version query. I send back
- * LNET_PROTO_ACCEPTOR_MAGIC to tell her I'm "old"
- */
- memset(&cr, 0, sizeof(cr));
- cr.acr_magic = LNET_PROTO_ACCEPTOR_MAGIC;
- cr.acr_version = LNET_PROTO_ACCEPTOR_VERSION;
- rc = lnet_sock_write(sock, &cr, sizeof(cr),
- accept_timeout);
-
- if (rc)
- CERROR("Error sending magic+version in response to LNET magic from %pI4h: %d\n",
- &peer_ip, rc);
- return -EPROTO;
- }
-
- if (lnet_accept_magic(magic, LNET_PROTO_TCP_MAGIC))
- str = "'old' socknal/tcpnal";
- else
- str = "unrecognised";
-
- LCONSOLE_ERROR_MSG(0x11f, "Refusing connection from %pI4h magic %08x: %s acceptor protocol\n",
- &peer_ip, magic, str);
- return -EPROTO;
- }
-
- flip = (magic != LNET_PROTO_ACCEPTOR_MAGIC);
-
- rc = lnet_sock_read(sock, &cr.acr_version, sizeof(cr.acr_version),
- accept_timeout);
- if (rc) {
- CERROR("Error %d reading connection request version from %pI4h\n",
- rc, &peer_ip);
- return -EIO;
- }
-
- if (flip)
- __swab32s(&cr.acr_version);
-
- if (cr.acr_version != LNET_PROTO_ACCEPTOR_VERSION) {
- /*
- * future version compatibility!
- * An acceptor-specific protocol rev will first send a version
- * query. I send back my current version to tell her I'm
- * "old".
- */
- int peer_version = cr.acr_version;
-
- memset(&cr, 0, sizeof(cr));
- cr.acr_magic = LNET_PROTO_ACCEPTOR_MAGIC;
- cr.acr_version = LNET_PROTO_ACCEPTOR_VERSION;
-
- rc = lnet_sock_write(sock, &cr, sizeof(cr), accept_timeout);
- if (rc)
- CERROR("Error sending magic+version in response to version %d from %pI4h: %d\n",
- peer_version, &peer_ip, rc);
- return -EPROTO;
- }
-
- rc = lnet_sock_read(sock, &cr.acr_nid,
- sizeof(cr) -
- offsetof(struct lnet_acceptor_connreq, acr_nid),
- accept_timeout);
- if (rc) {
- CERROR("Error %d reading connection request from %pI4h\n",
- rc, &peer_ip);
- return -EIO;
- }
-
- if (flip)
- __swab64s(&cr.acr_nid);
-
- ni = lnet_net2ni(LNET_NIDNET(cr.acr_nid));
- if (!ni || /* no matching net */
- ni->ni_nid != cr.acr_nid) { /* right NET, wrong NID! */
- if (ni)
- lnet_ni_decref(ni);
- LCONSOLE_ERROR_MSG(0x120, "Refusing connection from %pI4h for %s: No matching NI\n",
- &peer_ip, libcfs_nid2str(cr.acr_nid));
- return -EPERM;
- }
-
- if (!ni->ni_lnd->lnd_accept) {
- /* This catches a request for the loopback LND */
- lnet_ni_decref(ni);
- LCONSOLE_ERROR_MSG(0x121, "Refusing connection from %pI4h for %s: NI doesn not accept IP connections\n",
- &peer_ip, libcfs_nid2str(cr.acr_nid));
- return -EPERM;
- }
-
- CDEBUG(D_NET, "Accept %s from %pI4h\n",
- libcfs_nid2str(cr.acr_nid), &peer_ip);
-
- rc = ni->ni_lnd->lnd_accept(ni, sock);
-
- lnet_ni_decref(ni);
- return rc;
-}
-
-static int
-lnet_acceptor(void *arg)
-{
- struct socket *newsock;
- int rc;
- __u32 magic;
- __u32 peer_ip;
- int peer_port;
- int secure = (int)((long)arg);
-
- LASSERT(!lnet_acceptor_state.pta_sock);
-
- rc = lnet_sock_listen(&lnet_acceptor_state.pta_sock, 0, accept_port,
- accept_backlog);
- if (rc) {
- if (rc == -EADDRINUSE)
- LCONSOLE_ERROR_MSG(0x122, "Can't start acceptor on port %d: port already in use\n",
- accept_port);
- else
- LCONSOLE_ERROR_MSG(0x123, "Can't start acceptor on port %d: unexpected error %d\n",
- accept_port, rc);
-
- lnet_acceptor_state.pta_sock = NULL;
- } else {
- LCONSOLE(0, "Accept %s, port %d\n", accept_type, accept_port);
- }
-
- /* set init status and unblock parent */
- lnet_acceptor_state.pta_shutdown = rc;
- complete(&lnet_acceptor_state.pta_signal);
-
- if (rc)
- return rc;
-
- while (!lnet_acceptor_state.pta_shutdown) {
- rc = lnet_sock_accept(&newsock, lnet_acceptor_state.pta_sock);
- if (rc) {
- if (rc != -EAGAIN) {
- CWARN("Accept error %d: pausing...\n", rc);
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(HZ);
- }
- continue;
- }
-
- /* maybe the LNet acceptor thread has been waken */
- if (lnet_acceptor_state.pta_shutdown) {
- sock_release(newsock);
- break;
- }
-
- rc = lnet_sock_getaddr(newsock, 1, &peer_ip, &peer_port);
- if (rc) {
- CERROR("Can't determine new connection's address\n");
- goto failed;
- }
-
- if (secure && peer_port > LNET_ACCEPTOR_MAX_RESERVED_PORT) {
- CERROR("Refusing connection from %pI4h: insecure port %d\n",
- &peer_ip, peer_port);
- goto failed;
- }
-
- rc = lnet_sock_read(newsock, &magic, sizeof(magic),
- accept_timeout);
- if (rc) {
- CERROR("Error %d reading connection request from %pI4h\n",
- rc, &peer_ip);
- goto failed;
- }
-
- rc = lnet_accept(newsock, magic);
- if (rc)
- goto failed;
-
- continue;
-
-failed:
- sock_release(newsock);
- }
-
- sock_release(lnet_acceptor_state.pta_sock);
- lnet_acceptor_state.pta_sock = NULL;
-
- CDEBUG(D_NET, "Acceptor stopping\n");
-
- /* unblock lnet_acceptor_stop() */
- complete(&lnet_acceptor_state.pta_signal);
- return 0;
-}
-
-static inline int
-accept2secure(const char *acc, long *sec)
-{
- if (!strcmp(acc, "secure")) {
- *sec = 1;
- return 1;
- } else if (!strcmp(acc, "all")) {
- *sec = 0;
- return 1;
- } else if (!strcmp(acc, "none")) {
- return 0;
- }
-
- LCONSOLE_ERROR_MSG(0x124, "Can't parse 'accept=\"%s\"'\n",
- acc);
- return -EINVAL;
-}
-
-int
-lnet_acceptor_start(void)
-{
- struct task_struct *task;
- int rc;
- long rc2;
- long secure;
-
- /* if acceptor is already running return immediately */
- if (!lnet_acceptor_state.pta_shutdown)
- return 0;
-
- LASSERT(!lnet_acceptor_state.pta_sock);
-
- rc = lnet_acceptor_get_tunables();
- if (rc)
- return rc;
-
- init_completion(&lnet_acceptor_state.pta_signal);
- rc = accept2secure(accept_type, &secure);
- if (rc <= 0)
- return rc;
-
- if (!lnet_count_acceptor_nis()) /* not required */
- return 0;
-
- task = kthread_run(lnet_acceptor, (void *)(uintptr_t)secure,
- "acceptor_%03ld", secure);
- if (IS_ERR(task)) {
- rc2 = PTR_ERR(task);
- CERROR("Can't start acceptor thread: %ld\n", rc2);
-
- return -ESRCH;
- }
-
- /* wait for acceptor to startup */
- wait_for_completion(&lnet_acceptor_state.pta_signal);
-
- if (!lnet_acceptor_state.pta_shutdown) {
- /* started OK */
- LASSERT(lnet_acceptor_state.pta_sock);
- return 0;
- }
-
- LASSERT(!lnet_acceptor_state.pta_sock);
-
- return -ENETDOWN;
-}
-
-void
-lnet_acceptor_stop(void)
-{
- struct sock *sk;
-
- if (lnet_acceptor_state.pta_shutdown) /* not running */
- return;
-
- lnet_acceptor_state.pta_shutdown = 1;
-
- sk = lnet_acceptor_state.pta_sock->sk;
-
- /* awake any sleepers using safe method */
- sk->sk_state_change(sk);
-
- /* block until acceptor signals exit */
- wait_for_completion(&lnet_acceptor_state.pta_signal);
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.