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https://github.com/samba-team/samba.git
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0ff1b78fc2
Since commit 77deaadca8, a nodeA which
had previously accepted a connection from nodeB (where nodeB dies
e.g. as as result of fencing) when nodeB attempts to connect again
after restarting is always rejected with
ctdb_listen_event: Incoming queue active, rejecting connection from w.x.y.z
messages.
Consolidate dead node handling in the TCP restart handling.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14295
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/*
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ctdb over TCP
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Copyright (C) Andrew Tridgell 2006
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/network.h"
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#include "system/filesys.h"
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#include "lib/util/dlinklist.h"
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#include "lib/util/debug.h"
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#include "ctdb_private.h"
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#include "common/common.h"
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#include "common/logging.h"
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#include "ctdb_tcp.h"
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/*
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called when a complete packet has come in
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*/
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void ctdb_tcp_read_cb(uint8_t *data, size_t cnt, void *args)
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{
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struct ctdb_node *node = talloc_get_type_abort(args, struct ctdb_node);
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struct ctdb_tcp_node *tnode = talloc_get_type_abort(
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node->transport_data, struct ctdb_tcp_node);
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struct ctdb_req_header *hdr = (struct ctdb_req_header *)data;
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if (data == NULL) {
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/* incoming socket has died */
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goto failed;
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}
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if (cnt < sizeof(*hdr)) {
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DEBUG(DEBUG_ALERT,(__location__ " Bad packet length %u\n", (unsigned)cnt));
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goto failed;
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}
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if (cnt & (CTDB_TCP_ALIGNMENT-1)) {
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DEBUG(DEBUG_ALERT,(__location__ " Length 0x%x not multiple of alignment\n",
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(unsigned)cnt));
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goto failed;
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}
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if (hdr->ctdb_magic != CTDB_MAGIC) {
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DEBUG(DEBUG_ALERT,(__location__ " Non CTDB packet 0x%x rejected\n",
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hdr->ctdb_magic));
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goto failed;
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}
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if (hdr->ctdb_version != CTDB_PROTOCOL) {
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DEBUG(DEBUG_ALERT, (__location__ " Bad CTDB version 0x%x rejected\n",
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hdr->ctdb_version));
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goto failed;
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}
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/* tell the ctdb layer above that we have a packet */
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tnode->ctdb->upcalls->recv_pkt(tnode->ctdb, data, cnt);
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return;
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failed:
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node->ctdb->upcalls->node_dead(node);
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TALLOC_FREE(data);
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}
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/*
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queue a packet for sending
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*/
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int ctdb_tcp_queue_pkt(struct ctdb_node *node, uint8_t *data, uint32_t length)
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{
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struct ctdb_tcp_node *tnode = talloc_get_type(node->transport_data,
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struct ctdb_tcp_node);
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if (tnode->out_queue == NULL) {
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DBG_DEBUG("No outgoing connection, dropping packet\n");
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return 0;
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}
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return ctdb_queue_send(tnode->out_queue, data, length);
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}
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