static int
_slurmd_init(void)
{
struct rlimit rlim;
slurm_ctl_conf_t *cf;
struct stat stat_buf;
uint32_t cpu_cnt;
/*
* Process commandline arguments first, since one option may be
* an alternate location for the slurm config file.
*/
_process_cmdline(*conf->argc, *conf->argv);
/*
* Build nodes table like in slurmctld
* This is required by the topology stack
* Node tables setup must preceed _read_config() so that the
* proper hostname is set.
*/
slurm_conf_init(conf->conffile);
init_node_conf();
/* slurm_select_init() must be called before
* build_all_nodeline_info() to be called with proper argument. */
if (slurm_select_init(1) != SLURM_SUCCESS )
return SLURM_FAILURE;
build_all_nodeline_info(true);
build_all_frontend_info(true);
/*
* Read global slurm config file, override necessary values from
* defaults and command line.
*/
_read_config();
cpu_cnt = MAX(conf->conf_cpus, conf->block_map_size);
if ((gres_plugin_init() != SLURM_SUCCESS) ||
(gres_plugin_node_config_load(cpu_cnt) != SLURM_SUCCESS))
return SLURM_FAILURE;
if (slurm_topo_init() != SLURM_SUCCESS)
return SLURM_FAILURE;
/*
* Get and set slurmd topology information
* Build node hash table first to speed up the topo build
*/
rehash_node();
slurm_topo_build_config();
_set_topo_info();
/*
* Check for cpu frequency set capabilities on this node
*/
cpu_freq_init(conf);
_print_conf();
if (slurm_proctrack_init() != SLURM_SUCCESS)
return SLURM_FAILURE;
if (slurmd_task_init() != SLURM_SUCCESS)
return SLURM_FAILURE;
if (slurm_auth_init(NULL) != SLURM_SUCCESS)
return SLURM_FAILURE;
if (spank_slurmd_init() < 0)
return SLURM_FAILURE;
if (getrlimit(RLIMIT_CPU, &rlim) == 0) {
rlim.rlim_cur = rlim.rlim_max;
setrlimit(RLIMIT_CPU, &rlim);
if (rlim.rlim_max != RLIM_INFINITY) {
error("Slurmd process CPU time limit is %d seconds",
(int) rlim.rlim_max);
}
}
if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) {
rlim.rlim_cur = rlim.rlim_max;
setrlimit(RLIMIT_NOFILE, &rlim);
}
#ifndef NDEBUG
if (getrlimit(RLIMIT_CORE, &rlim) == 0) {
rlim.rlim_cur = rlim.rlim_max;
setrlimit(RLIMIT_CORE, &rlim);
}
#endif /* !NDEBUG */
/*
* Create a context for verifying slurm job credentials
*/
if (!(conf->vctx = slurm_cred_verifier_ctx_create(conf->pubkey)))
return SLURM_FAILURE;
if (!strcmp(conf->select_type, "select/serial")) {
/* Only cache credential for 5 seconds with select/serial
* for shorter cache searches and higher throughput */
slurm_cred_ctx_set(conf->vctx, SLURM_CRED_OPT_EXPIRY_WINDOW, 5);
}
/*
* Create slurmd spool directory if necessary.
*/
if (_set_slurmd_spooldir() < 0) {
error("Unable to initialize slurmd spooldir");
return SLURM_FAILURE;
}
if (conf->cleanstart) {
/*
* Need to kill any running slurmd's here
*/
_kill_old_slurmd();
stepd_cleanup_sockets(conf->spooldir, conf->node_name);
_stepd_cleanup_batch_dirs(conf->spooldir, conf->node_name);
}
if (conf->daemonize) {
bool success = false;
if (conf->logfile && (conf->logfile[0] == '/')) {
char *slash_ptr, *work_dir;
work_dir = xstrdup(conf->logfile);
slash_ptr = strrchr(work_dir, '/');
if (slash_ptr == work_dir)
work_dir[1] = '\0';
else
slash_ptr[0] = '\0';
if ((access(work_dir, W_OK) != 0) ||
(chdir(work_dir) < 0)) {
error("Unable to chdir to %s", work_dir);
} else
success = true;
xfree(work_dir);
}
if (!success) {
if ((access(conf->spooldir, W_OK) != 0) ||
(chdir(conf->spooldir) < 0)) {
error("Unable to chdir to %s", conf->spooldir);
} else
success = true;
}
if (!success) {
if ((access("/var/tmp", W_OK) != 0) ||
(chdir("/var/tmp") < 0)) {
error("chdir(/var/tmp): %m");
return SLURM_FAILURE;
} else
info("chdir to /var/tmp");
}
}
/*
* Cache the group access list
*/
cf = slurm_conf_lock();
if (cf->group_info & GROUP_CACHE)
init_gids_cache(1);
else
init_gids_cache(0);
slurm_conf_unlock();
if ((devnull = open_cloexec("/dev/null", O_RDWR)) < 0) {
error("Unable to open /dev/null: %m");
return SLURM_FAILURE;
}
/* make sure we have slurmstepd installed */
if (stat(conf->stepd_loc, &stat_buf))
fatal("Unable to find slurmstepd file at %s", conf->stepd_loc);
if (!S_ISREG(stat_buf.st_mode))
fatal("slurmstepd not a file at %s", conf->stepd_loc);
return SLURM_SUCCESS;
}
int
main (int argc, char **argv)
{
slurm_addr_t *cli;
slurm_addr_t *self;
slurm_msg_t *msg;
stepd_step_rec_t *job;
int ngids;
gid_t *gids;
int rc = 0;
char *launch_params;
if (_process_cmdline (argc, argv) < 0)
fatal ("Error in slurmstepd command line");
xsignal_block(slurmstepd_blocked_signals);
conf = xmalloc(sizeof(*conf));
conf->argv = &argv;
conf->argc = &argc;
init_setproctitle(argc, argv);
if (slurm_select_init(1) != SLURM_SUCCESS )
fatal( "failed to initialize node selection plugin" );
if (slurm_auth_init(NULL) != SLURM_SUCCESS)
fatal( "failed to initialize authentication plugin" );
/* Receive job parameters from the slurmd */
_init_from_slurmd(STDIN_FILENO, argv, &cli, &self, &msg,
&ngids, &gids);
/* Create the stepd_step_rec_t, mostly from info in a
* launch_tasks_request_msg_t or a batch_job_launch_msg_t */
if (!(job = _step_setup(cli, self, msg))) {
_send_fail_to_slurmd(STDOUT_FILENO);
rc = SLURM_FAILURE;
goto ending;
}
job->ngids = ngids;
job->gids = gids;
/* fork handlers cause mutexes on some global data structures
* to be re-initialized after the fork. */
list_install_fork_handlers();
slurm_conf_install_fork_handlers();
/* sets job->msg_handle and job->msgid */
if (msg_thr_create(job) == SLURM_ERROR) {
_send_fail_to_slurmd(STDOUT_FILENO);
rc = SLURM_FAILURE;
goto ending;
}
_send_ok_to_slurmd(STDOUT_FILENO);
_got_ack_from_slurmd(STDIN_FILENO);
/* Fancy way of closing stdin that keeps STDIN_FILENO from being
* allocated to any random file. The slurmd already opened /dev/null
* on STDERR_FILENO for us. */
dup2(STDERR_FILENO, STDIN_FILENO);
/* Fancy way of closing stdout that keeps STDOUT_FILENO from being
* allocated to any random file. The slurmd already opened /dev/null
* on STDERR_FILENO for us. */
dup2(STDERR_FILENO, STDOUT_FILENO);
/* slurmstepd is the only daemon that should survive upgrade. If it
* had been swapped out before upgrade happened it could easily lead
* to SIGBUS at any time after upgrade. Avoid that by locking it
* in-memory. */
launch_params = slurm_get_launch_params();
if (launch_params && strstr(launch_params, "slurmstepd_memlock")) {
#ifdef _POSIX_MEMLOCK
int flags = MCL_CURRENT;
if (strstr(launch_params, "slurmstepd_memlock_all"))
flags |= MCL_FUTURE;
if (mlockall(flags) < 0)
info("failed to mlock() slurmstepd pages: %m");
else
debug("slurmstepd locked in memory");
#else
info("mlockall() system call does not appear to be available");
#endif
}
xfree(launch_params);
/* This does most of the stdio setup, then launches all the tasks,
* and blocks until the step is complete */
rc = job_manager(job);
return stepd_cleanup(msg, job, cli, self, rc, 0);
ending:
return stepd_cleanup(msg, job, cli, self, rc, 1);
}
