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dmeventd: rework _restart_dmeventd

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Use _restart_dmeventd() with return values 0,1,2.
Also let's use already created fifos struct.

Make sure the _systemd_activation variable is properly initialized
from _systemd_handover before calling _restart_dmeventd() as
this variable is used there to decide where   1 or 2 should
be returned - aka either letting systemd to initilize
or restart dmeventd itself.
This commit is contained in:
Zdenek Kabelac 2024-04-11 23:26:46 +02:00
parent 449af6c335
commit 3a433b14f2
2 changed files with 24 additions and 27 deletions
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1
WHATS_NEW_DM
View File

@ -1,5 +1,6 @@
Version 1.02.198 -
===================
Correct dmeventd -R for systemd environment.
Restart of dmeventd -R checks pid file to detect running dmeventd first.
Query with dmeventd -i quickly ends when there is no running dmeventd.
Enhance dm_get_status_raid to handle mismatching status or reported legs.

50
daemons/dmeventd/dmeventd.c
View File

@ -2139,15 +2139,9 @@ out:
return ret;
}
static void _restart_dmeventd(void)
/* Return 0 - fail, 1 - success, 2 - continue */
static int _restart_dmeventd(struct dm_event_fifos *fifos)
{
struct dm_event_fifos fifos = {
.client = -1,
.server = -1,
/* FIXME Make these either configurable or depend directly on dmeventd_path */
.client_path = DM_EVENT_FIFO_CLIENT,
.server_path = DM_EVENT_FIFO_SERVER
};
struct dm_event_daemon_message msg = { 0 };
int i, count = 0;
char *message;
@ -2156,16 +2150,16 @@ static void _restart_dmeventd(void)
if (!dm_daemon_is_running(DMEVENTD_PIDFILE)) {
fprintf(stderr, "WARNING: Coult not find running dmeventd associated with pid file %s.\n", DMEVENTD_PIDFILE);
exit(EXIT_FAILURE);
return 0;
}
/* Get the list of registrations from the running daemon. */
if (!init_fifos(&fifos)) {
if (!init_fifos(fifos)) {
fprintf(stderr, "WARNING: Could not initiate communication with existing dmeventd.\n");
exit(EXIT_FAILURE);
return 0;
}
if (!dm_event_get_version(&fifos, &version)) {
if (!dm_event_get_version(fifos, &version)) {
fprintf(stderr, "WARNING: Could not communicate with existing dmeventd.\n");
goto bad;
}
@ -2177,7 +2171,7 @@ static void _restart_dmeventd(void)
goto bad;
}
if (daemon_talk(&fifos, &msg, DM_EVENT_CMD_GET_STATUS, "-", "-", 0, 0))
if (daemon_talk(fifos, &msg, DM_EVENT_CMD_GET_STATUS, "-", "-", 0, 0))
goto bad;
message = strchr(msg.data, ' ') + 1;
@ -2201,7 +2195,7 @@ static void _restart_dmeventd(void)
}
if (version >= 2) {
if (daemon_talk(&fifos, &msg, DM_EVENT_CMD_GET_PARAMETERS, "-", "-", 0, 0)) {
if (daemon_talk(fifos, &msg, DM_EVENT_CMD_GET_PARAMETERS, "-", "-", 0, 0)) {
fprintf(stderr, "Failed to acquire parameters from old dmeventd.\n");
goto bad;
}
@ -2221,7 +2215,7 @@ static void _restart_dmeventd(void)
}
#endif
if (daemon_talk(&fifos, &msg, DM_EVENT_CMD_DIE, "-", "-", 0, 0)) {
if (daemon_talk(fifos, &msg, DM_EVENT_CMD_DIE, "-", "-", 0, 0)) {
fprintf(stderr, "Old dmeventd refused to die.\n");
goto bad;
}
@ -2230,30 +2224,30 @@ static void _restart_dmeventd(void)
((e = getenv(SD_ACTIVATION_ENV_VAR_NAME)) && strcmp(e, "1")))
_systemd_activation = 1;
fini_fifos(&fifos);
fini_fifos(fifos);
/* Give a few seconds dmeventd to finish */
_wait_for_new_pid();
if (!_systemd_activation)
return;
return 2; // continue with dmeventd start up
/* Reopen fifos. */
if (!init_fifos(&fifos)) {
if (!init_fifos(fifos)) {
fprintf(stderr, "Could not initiate communication with new instance of dmeventd.\n");
exit(EXIT_FAILURE);
return 0;
}
if (!_reinstate_registrations(&fifos)) {
if (!_reinstate_registrations(fifos)) {
fprintf(stderr, "Failed to reinstate monitoring with new instance of dmeventd.\n");
goto bad;
}
fini_fifos(&fifos);
exit(EXIT_SUCCESS);
fini_fifos(fifos);
return 1;
bad:
fini_fifos(&fifos);
exit(EXIT_FAILURE);
fini_fifos(fifos);
return 0;
}
static void _usage(char *prog, FILE *file)
@ -2334,13 +2328,15 @@ int main(int argc, char *argv[])
if (setenv("LC_ALL", "C", 1))
perror("Cannot set LC_ALL to C");
if (_restart)
_restart_dmeventd();
#ifdef __linux__
_systemd_activation = _systemd_handover(&fifos);
#endif
if (_restart) {
if ((_restart = _restart_dmeventd(&fifos)) < 2)
return restart ? EXIT_SUCCESS : EXIT_FAILURE;
}
if (!_foreground)
_daemonize();