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d89506449f
statd callout will shortly be updated to use NFS utils' sm-notify. This tiny helper will be used to create on-disk state files used by sm-notify. These state files contain endian-specific fields, so better to write a simple C implementation than to do crazy things in a shell script (or call out to Python). Signed-off-by: Martin Schwenke <mschwenke@ddn.com> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/*
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CTDB SM_NOTIFY helper for NFSv3 statd snippets
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Copyright 2023, DataDirect Networks, Inc. All rights reserved.
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Author: Martin Schwenke <mschwenke@ddn.com>
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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 "lib/util/sys_rw.h"
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static void print_monitor_line(const char *client_ip,
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const char *server_ip)
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{
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/*
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* sm-notify doesn't read priv. rpc.statd appears to use it
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* for uniqueness of multi-line files.
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*/
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const char *priv = "00000000000000000000000000000000";
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/*
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* sm_mon_1_svc() takes care to write in this format, so let's
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* do that too, even though sm-notify ignores this field...
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*/
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uint32_t inaddr_loopback = htonl(INADDR_LOOPBACK);
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printf("%08x %08x %08x %08x %s %s %s\n",
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inaddr_loopback,
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100021, /* NLM_PROG */
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4, /* SM_VERS */
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16,
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priv,
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client_ip,
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server_ip);
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}
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static void print_state(const char *state_str)
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{
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int state = atoi(state_str);
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/*
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* Uncomplicated binary output. sm-notify just reads this as
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* an int via nsm_get_state(). This file will always be
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* created in a local temporary directory and is consumed by
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* sm-notify locally, so no inter-node endianness issues.
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*/
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sys_write(STDOUT_FILENO, &state, sizeof(state));
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}
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static void usage(const char *prog)
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{
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printf("usage: %s { monitor <client-ip> <source-ip> | state <state> }\n",
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prog);
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exit(1);
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}
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int main(int argc, const char *argv[])
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{
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if (argc == 4 && strcmp(argv[1], "monitor") == 0) {
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print_monitor_line(argv[2], argv[3]);
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} else if (argc == 3 && strcmp(argv[1], "state") == 0) {
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print_state(argv[2]);
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} else {
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usage(argv[0]);
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}
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return 0;
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}
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