Example #1
0
/* Start a job:
 *	CMD=STARTJOB ARG=<jobid> TASKLIST=<node_list> [COMMENT=<whatever>]
 * RET 0 on success, -1 on failure */
extern int	start_job(char *cmd_ptr, int *err_code, char **err_msg)
{
	char *arg_ptr, *comment_ptr, *task_ptr, *tasklist, *tmp_char;
	int i, rc, task_cnt;
	uint32_t jobid;
	hostlist_t hl = (hostlist_t) NULL;
	char *host_string;
	static char reply_msg[128];

	arg_ptr = strstr(cmd_ptr, "ARG=");
	if (arg_ptr == NULL) {
		*err_code = -300;
		*err_msg = "STARTJOB lacks ARG";
		error("wiki: STARTJOB lacks ARG");
		return -1;
	}
	jobid = strtoul(arg_ptr+4, &tmp_char, 10);
	if (!isspace(tmp_char[0])) {
		*err_code = -300;
		*err_msg = "Invalid ARG value";
		error("wiki: STARTJOB has invalid jobid");
		return -1;
	}

	comment_ptr = strstr(cmd_ptr, "COMMENT=");
	task_ptr    = strstr(cmd_ptr, "TASKLIST=");

	if (comment_ptr) {
		comment_ptr[7] = ':';
		comment_ptr += 8;
		if (comment_ptr[0] == '\"') {
			comment_ptr++;
			for (i=0; i<MAX_COMMENT_LEN; i++) {
				if (comment_ptr[i] == '\0')
					break;
				if (comment_ptr[i] == '\"') {
					comment_ptr[i] = '\0';
					break;
				}
			}
			if (i == MAX_COMMENT_LEN)
				comment_ptr[i-1] = '\0';
		} else if (comment_ptr[0] == '\'') {
			comment_ptr++;
			for (i=0; i<MAX_COMMENT_LEN; i++) {
				if (comment_ptr[i] == '\0')
					break;
				if (comment_ptr[i] == '\'') {
					comment_ptr[i] = '\0';
					break;
				}
			}
			if (i == MAX_COMMENT_LEN)
				comment_ptr[i-1] = '\0';
		} else
			null_term(comment_ptr);
	}

	if (task_ptr == NULL) {
		*err_code = -300;
		*err_msg = "STARTJOB lacks TASKLIST";
		error("wiki: STARTJOB lacks TASKLIST");
		return -1;
	}
	task_ptr += 9;	/* skip over "TASKLIST=" */
	if ((task_ptr[0] == '\0') || isspace(task_ptr[0])) {
		/* No TASKLIST specification, useful for testing */
		host_string = xstrdup("");
		task_cnt = 0;
		tasklist = NULL;
	} else {
		null_term(task_ptr);
		tasklist = moab2slurm_task_list(task_ptr, &task_cnt);
		if (tasklist)
			hl = hostlist_create(tasklist);
		if ((tasklist == NULL) || (hl == NULL)) {
			*err_code = -300;
			*err_msg = "STARTJOB TASKLIST is invalid";
			error("wiki: STARTJOB TASKLIST is invalid: %s",
			      task_ptr);
			xfree(tasklist);
			return -1;
		}
		hostlist_uniq(hl);
		hostlist_sort(hl);
		host_string = hostlist_ranged_string_xmalloc(hl);
		hostlist_destroy(hl);
		if (host_string == NULL) {
			*err_code = -300;
			*err_msg = "STARTJOB has invalid TASKLIST";
			error("wiki: STARTJOB has invalid TASKLIST: %s",
			      tasklist);
			xfree(tasklist);
			return -1;
		}
	}

	rc = _start_job(jobid, task_cnt, host_string, tasklist, comment_ptr,
			err_code, err_msg);
	xfree(host_string);
	xfree(tasklist);
	if (rc == 0) {
		snprintf(reply_msg, sizeof(reply_msg),
			"job %u started successfully", jobid);
		*err_msg = reply_msg;
	}
	return rc;
}
Example #2
0
static int	_job_modify(uint32_t jobid, char *bank_ptr,
			char *depend_ptr, char *new_hostlist,
			uint32_t new_node_cnt, char *part_name_ptr,
			uint32_t new_time_limit, char *name_ptr,
			char *start_ptr, char *feature_ptr, char *env_ptr,
			char *comment_ptr, char *gres_ptr, char *wckey_ptr)
{
	struct job_record *job_ptr;
	time_t now = time(NULL);
	bool update_accounting = false;

	job_ptr = find_job_record(jobid);
	if (job_ptr == NULL) {
		error("wiki: MODIFYJOB has invalid jobid %u", jobid);
		return ESLURM_INVALID_JOB_ID;
	}
	if (IS_JOB_FINISHED(job_ptr) || (job_ptr->details == NULL)) {
		info("wiki: MODIFYJOB jobid %u is finished", jobid);
		return ESLURM_DISABLED;
	}

	if (comment_ptr) {
		info("wiki: change job %u comment %s", jobid, comment_ptr);
		xfree(job_ptr->comment);
		job_ptr->comment = xstrdup(comment_ptr);
		last_job_update = now;
	}

	if (depend_ptr) {
		int rc = update_job_dependency(job_ptr, depend_ptr);
		if (rc == SLURM_SUCCESS) {
			info("wiki: changed job %u dependency to %s",
				jobid, depend_ptr);
		} else {
			error("wiki: changing job %u dependency to %s",
				jobid, depend_ptr);
			return EINVAL;
		}
	}

	if (env_ptr) {
		bool have_equal = false;
		char old_sep[1];
		int begin = 0, i;

		if (job_ptr->batch_flag == 0) {
			error("wiki: attempt to set environment variables "
			      "for non-batch job %u", jobid);
			return ESLURM_DISABLED;
		}
		for (i=0; ; i++) {
			if (env_ptr[i] == '=') {
				if (have_equal) {
					error("wiki: setting job %u invalid "
					      "environment variables: %s",
					      jobid, env_ptr);
					return EINVAL;
				}
				have_equal = true;
				if (env_ptr[i+1] == '\"') {
					for (i+=2; ; i++) {
						if (env_ptr[i] == '\0') {
							error("wiki: setting job %u "
							      "invalid environment "
							      "variables: %s",
					 		     jobid, env_ptr);
							return EINVAL;
						}
						if (env_ptr[i] == '\"') {
							i++;
							break;
						}
						if (env_ptr[i] == '\\') {
							i++;
						}
					}
				} else if (env_ptr[i+1] == '\'') {
					for (i+=2; ; i++) {
						if (env_ptr[i] == '\0') {
							error("wiki: setting job %u "
							      "invalid environment "
							      "variables: %s",
					 		     jobid, env_ptr);
							return EINVAL;
						}
						if (env_ptr[i] == '\'') {
							i++;
							break;
						}
						if (env_ptr[i] == '\\') {
							i++;
						}
					}
				}
			}
			if (isspace(env_ptr[i]) || (env_ptr[i] == ',')) {
				if (!have_equal) {
					error("wiki: setting job %u invalid "
					      "environment variables: %s",
					      jobid, env_ptr);
					return EINVAL;
				}
				old_sep[0] = env_ptr[i];
				env_ptr[i] = '\0';
				xrealloc(job_ptr->details->env_sup,
					 sizeof(char *) *
					 (job_ptr->details->env_cnt+1));
				job_ptr->details->env_sup
						[job_ptr->details->env_cnt++] =
						xstrdup(&env_ptr[begin]);
				info("wiki: for job %u add env: %s",
				     jobid, &env_ptr[begin]);
				env_ptr[i] = old_sep[0];
				if (isspace(old_sep[0]))
					break;
				begin = i + 1;
				have_equal = false;
			}
		}
	}

	if (new_time_limit) {
		time_t old_time = job_ptr->time_limit;
		job_ptr->time_limit = new_time_limit;
		info("wiki: change job %u time_limit to %u",
			jobid, new_time_limit);
		/* Update end_time based upon change
		 * to preserve suspend time info */
		job_ptr->end_time = job_ptr->end_time +
				((job_ptr->time_limit -
				  old_time) * 60);
		last_job_update = now;
	}

	if (bank_ptr &&
	    (update_job_account("wiki", job_ptr, bank_ptr) != SLURM_SUCCESS)) {
		return EINVAL;
	}

	if (feature_ptr) {
		if (IS_JOB_PENDING(job_ptr) && (job_ptr->details)) {
			info("wiki: change job %u features to %s",
				jobid, feature_ptr);
			job_ptr->details->features = xstrdup(feature_ptr);
			last_job_update = now;
		} else {
			error("wiki: MODIFYJOB features of non-pending "
				"job %u", jobid);
			return ESLURM_DISABLED;
		}
	}

	if (start_ptr) {
		char *end_ptr;
		uint32_t begin_time = strtol(start_ptr, &end_ptr, 10);
		if (IS_JOB_PENDING(job_ptr) && (job_ptr->details)) {
			info("wiki: change job %u begin time to %u",
				jobid, begin_time);
			job_ptr->details->begin_time = begin_time;
			last_job_update = now;
			update_accounting = true;
		} else {
			error("wiki: MODIFYJOB begin_time of non-pending "
				"job %u", jobid);
			return ESLURM_DISABLED;
		}
	}

	if (name_ptr) {
		if (IS_JOB_PENDING(job_ptr)) {
			info("wiki: change job %u name %s", jobid, name_ptr);
			xfree(job_ptr->name);
			job_ptr->name = xstrdup(name_ptr);
			last_job_update = now;
			update_accounting = true;
		} else {
			error("wiki: MODIFYJOB name of non-pending job %u",
			      jobid);
			return ESLURM_DISABLED;
		}
	}

	if (new_hostlist) {
		int rc = 0, task_cnt;
		hostlist_t hl;
		char *tasklist;

		if (!IS_JOB_PENDING(job_ptr) || !job_ptr->details) {
			/* Job is done, nothing to reset */
			if (new_hostlist == '\0')
				goto host_fini;
			error("wiki: MODIFYJOB hostlist of non-pending "
				"job %u", jobid);
			return ESLURM_DISABLED;
		}

		xfree(job_ptr->details->req_nodes);
		FREE_NULL_BITMAP(job_ptr->details->req_node_bitmap);
		if (new_hostlist == '\0')
			goto host_fini;

		tasklist = moab2slurm_task_list(new_hostlist, &task_cnt);
		if (tasklist == NULL) {
			rc = 1;
			goto host_fini;
		}
		hl = hostlist_create(tasklist);
		if (hl == 0) {
			rc = 1;
			goto host_fini;
		}
		hostlist_uniq(hl);
		hostlist_sort(hl);
		job_ptr->details->req_nodes =
			hostlist_ranged_string_xmalloc(hl);
		hostlist_destroy(hl);
		if (job_ptr->details->req_nodes == NULL) {
			rc = 1;
			goto host_fini;
		}
		if (node_name2bitmap(job_ptr->details->req_nodes, false,
                                     &job_ptr->details->req_node_bitmap)) {
			rc = 1;
			goto host_fini;
		}

host_fini:	if (rc) {
			info("wiki: change job %u invalid hostlist %s",
				jobid, new_hostlist);
			xfree(job_ptr->details->req_nodes);
			return EINVAL;
		} else {
			info("wiki: change job %u hostlist %s",
				jobid, new_hostlist);
			update_accounting = true;
		}
	}

	if (part_name_ptr) {
		struct part_record *part_ptr;
		if (!IS_JOB_PENDING(job_ptr)) {
			error("wiki: MODIFYJOB partition of non-pending "
			      "job %u", jobid);
			return ESLURM_DISABLED;
		}

		part_ptr = find_part_record(part_name_ptr);
		if (part_ptr == NULL) {
			error("wiki: MODIFYJOB has invalid partition %s",
				part_name_ptr);
			return ESLURM_INVALID_PARTITION_NAME;
		}

		info("wiki: change job %u partition %s",
			jobid, part_name_ptr);
		xfree(job_ptr->partition);
		job_ptr->partition = xstrdup(part_name_ptr);
		job_ptr->part_ptr = part_ptr;
		last_job_update = now;
		update_accounting = true;
	}

	if (new_node_cnt) {
		job_desc_msg_t job_desc;
#ifdef HAVE_BG
		uint16_t geometry[SYSTEM_DIMENSIONS] = {(uint16_t) NO_VAL};
		static uint16_t cpus_per_node = 0;
		if (!cpus_per_node) {
			select_g_alter_node_cnt(SELECT_GET_NODE_CPU_CNT,
						&cpus_per_node);
		}
#endif
		if(!IS_JOB_PENDING(job_ptr) || !job_ptr->details) {
			error("wiki: MODIFYJOB node count of non-pending "
			      "job %u", jobid);
			return ESLURM_DISABLED;
		}
		memset(&job_desc, 0, sizeof(job_desc_msg_t));

		job_desc.min_nodes = new_node_cnt;
		job_desc.max_nodes = NO_VAL;
		job_desc.select_jobinfo = select_g_select_jobinfo_alloc();

		select_g_alter_node_cnt(SELECT_SET_NODE_CNT, &job_desc);

		select_g_select_jobinfo_free(job_desc.select_jobinfo);

		job_ptr->details->min_nodes = job_desc.min_nodes;
		if (job_ptr->details->max_nodes &&
		    (job_ptr->details->max_nodes < job_desc.min_nodes))
			job_ptr->details->max_nodes = job_desc.min_nodes;
		info("wiki: change job %u min_nodes to %u",
		     jobid, new_node_cnt);
#ifdef HAVE_BG
		job_ptr->details->min_cpus = job_desc.min_cpus;
		job_ptr->details->max_cpus = job_desc.max_cpus;
		job_ptr->details->pn_min_cpus = job_desc.pn_min_cpus;

		new_node_cnt = job_ptr->details->min_cpus;
		if (cpus_per_node)
			new_node_cnt /= cpus_per_node;

		/* This is only set up so accounting is set up correctly */
		select_g_select_jobinfo_set(job_ptr->select_jobinfo,
					    SELECT_JOBDATA_NODE_CNT,
					    &new_node_cnt);
		/* reset geo since changing this makes any geo
		   potentially invalid */
		select_g_select_jobinfo_set(job_ptr->select_jobinfo,
					    SELECT_JOBDATA_GEOMETRY,
					    geometry);
#endif
		last_job_update = now;
		update_accounting = true;
	}

	if (gres_ptr) {
		char *orig_gres;

		if (!IS_JOB_PENDING(job_ptr)) {
			error("wiki: MODIFYJOB GRES of non-pending job %u",
			      jobid);
			return ESLURM_DISABLED;
		}

		orig_gres = job_ptr->gres;
		job_ptr->gres = NULL;
		if (gres_ptr[0])
			job_ptr->gres = xstrdup(gres_ptr);
		if (gres_plugin_job_state_validate(job_ptr->gres,
						   &job_ptr->gres_list)) {
			error("wiki: MODIFYJOB Invalid GRES=%s", gres_ptr);
			xfree(job_ptr->gres);
			job_ptr->gres = orig_gres;
			return ESLURM_INVALID_GRES;
		}
		xfree(orig_gres);
	}

	if (wckey_ptr) {
		int rc = update_job_wckey("update_job", job_ptr, wckey_ptr);
		if (rc != SLURM_SUCCESS) {
			error("wiki: MODIFYJOB Invalid WCKEY=%s", wckey_ptr);
			return rc;
		}
	}

	if (update_accounting) {
		if (job_ptr->details && job_ptr->details->begin_time) {
			/* Update job record in accounting to reflect
			 * the changes */
			jobacct_storage_g_job_start(acct_db_conn, job_ptr);
		}
	}

	return SLURM_SUCCESS;
}
Example #3
0
static int	_job_modify(uint32_t jobid, char *bank_ptr,
			char *depend_ptr, char *new_hostlist,
			uint32_t new_node_cnt, char *part_name_ptr,
			uint32_t new_time_limit)
{
	struct job_record *job_ptr;
	bool update_accounting = false;

	job_ptr = find_job_record(jobid);
	if (job_ptr == NULL) {
		error("wiki: MODIFYJOB has invalid jobid %u", jobid);
		return ESLURM_INVALID_JOB_ID;
	}
	if (IS_JOB_FINISHED(job_ptr)) {
		error("wiki: MODIFYJOB jobid %u is finished", jobid);
		return ESLURM_DISABLED;
	}

	if (depend_ptr) {
		int rc = update_job_dependency(job_ptr, depend_ptr);
		if (rc == SLURM_SUCCESS) {
			info("wiki: changed job %u dependency to %s",
				jobid, depend_ptr);
		} else {
			error("wiki: changing job %u dependency to %s",
				jobid, depend_ptr);
			return EINVAL;
		}
	}

	if (new_time_limit) {
		time_t old_time = job_ptr->time_limit;
		job_ptr->time_limit = new_time_limit;
		info("wiki: change job %u time_limit to %u",
			jobid, new_time_limit);
		/* Update end_time based upon change
		 * to preserve suspend time info */
		job_ptr->end_time = job_ptr->end_time +
				((job_ptr->time_limit -
				  old_time) * 60);
		last_job_update = time(NULL);
	}

	if (bank_ptr) {
		if (update_job_account("wiki", job_ptr, bank_ptr)
		   != SLURM_SUCCESS)
			return EINVAL;
		else
			update_accounting = true;
	}

	if (new_hostlist) {
		int rc = 0, task_cnt;
		hostlist_t hl;
		char *tasklist;

		if (!IS_JOB_PENDING(job_ptr) || !job_ptr->details) {
			/* Job is done, nothing to reset */
			if (new_hostlist == '\0')
				goto host_fini;
			error("wiki: MODIFYJOB tasklist of non-pending "
				"job %u", jobid);
			return ESLURM_DISABLED;
		}

		xfree(job_ptr->details->req_nodes);
		FREE_NULL_BITMAP(job_ptr->details->req_node_bitmap);
		if (new_hostlist == '\0')
			goto host_fini;

		tasklist = moab2slurm_task_list(new_hostlist, &task_cnt);
		if (tasklist == NULL) {
			rc = 1;
			goto host_fini;
		}
		hl = hostlist_create(tasklist);
		if (hl == 0) {
			rc = 1;
			goto host_fini;
		}
		hostlist_uniq(hl);
		hostlist_sort(hl);
		job_ptr->details->req_nodes =
			hostlist_ranged_string_xmalloc(hl);
		hostlist_destroy(hl);
		if (job_ptr->details->req_nodes == NULL) {
			rc = 1;
			goto host_fini;
		}
		if (node_name2bitmap(job_ptr->details->req_nodes, false,
                                     &job_ptr->details->req_node_bitmap)) {
			rc = 1;
			goto host_fini;
		}

host_fini:	if (rc) {
			info("wiki: change job %u invalid hostlist %s",
			     jobid, new_hostlist);
			xfree(job_ptr->details->req_nodes);
			return EINVAL;
		} else {
			info("wiki: change job %u hostlist %s",
			     jobid, new_hostlist);
			update_accounting = true;
		}
	}

	if (part_name_ptr) {
		struct part_record *part_ptr;
		if (!IS_JOB_PENDING(job_ptr)) {
			error("wiki: MODIFYJOB partition of non-pending "
			      "job %u", jobid);
			return ESLURM_DISABLED;
		}

		part_ptr = find_part_record(part_name_ptr);
		if (part_ptr == NULL) {
			error("wiki: MODIFYJOB has invalid partition %s",
				part_name_ptr);
			return ESLURM_INVALID_PARTITION_NAME;
		}
		info("wiki: change job %u partition %s",
			jobid, part_name_ptr);
		xfree(job_ptr->partition);
		job_ptr->partition = xstrdup(part_name_ptr);
		job_ptr->part_ptr = part_ptr;
		last_job_update = time(NULL);
		update_accounting = true;
	}
	if (new_node_cnt) {
		if (IS_JOB_PENDING(job_ptr) && job_ptr->details) {
			job_ptr->details->min_nodes = new_node_cnt;
			if (job_ptr->details->max_nodes
			&&  (job_ptr->details->max_nodes < new_node_cnt))
				job_ptr->details->max_nodes = new_node_cnt;
			info("wiki: change job %u min_nodes to %u",
				jobid, new_node_cnt);
			last_job_update = time(NULL);
			update_accounting = true;
		} else {
			error("wiki: MODIFYJOB node count of non-pending "
				"job %u", jobid);
			return ESLURM_DISABLED;
		}
	}

	if (update_accounting) {
		/* Update job record in accounting to reflect changes */
		jobacct_storage_job_start_direct(acct_db_conn, job_ptr);
	}

	return SLURM_SUCCESS;
}
Example #4
0
/* Start a job:
 *	CMD=STARTJOB ARG=<jobid> TASKLIST=<node_list>
 * RET 0 on success, -1 on failure */
extern int	start_job(char *cmd_ptr, int *err_code, char **err_msg)
{
	char *arg_ptr, *task_ptr, *tasklist, *tmp_char;
	int rc, task_cnt;
	uint32_t jobid;
	hostlist_t hl = (hostlist_t) NULL;
	char *host_string;
	static char reply_msg[128];

	arg_ptr = strstr(cmd_ptr, "ARG=");
	if (arg_ptr == NULL) {
		*err_code = -300;
		*err_msg = "STARTJOB lacks ARG";
		error("wiki: STARTJOB lacks ARG");
		return -1;
	}
	jobid = strtoul(arg_ptr+4, &tmp_char, 10);
	if (!isspace(tmp_char[0])) {
		*err_code = -300;
		*err_msg = "Invalid ARG value";
		error("wiki: STARTJOB has invalid jobid");
		return -1;
	}

	task_ptr = strstr(cmd_ptr, "TASKLIST=");
	if (task_ptr == NULL) {
		*err_code = -300;
		*err_msg = "STARTJOB lacks TASKLIST";
		error("wiki: STARTJOB lacks TASKLIST");
		return -1;
	}
	task_ptr += 9;	/* skip over "TASKLIST=" */
	null_term(task_ptr);
	tasklist = moab2slurm_task_list(task_ptr, &task_cnt);
	if (tasklist)
		hl = hostlist_create(tasklist);
	if ((tasklist == NULL) || (hl == NULL)) {
		*err_code = -300;
		*err_msg = "STARTJOB TASKLIST is invalid";
		error("wiki: STARTJOB TASKLIST is invalid: %s",
			task_ptr);
		xfree(tasklist);
		return -1;
	}
	hostlist_uniq(hl);
	hostlist_sort(hl);
	host_string = hostlist_ranged_string_xmalloc(hl);
	hostlist_destroy(hl);
	if (host_string == NULL) {
		*err_code = -300;
		*err_msg = "STARTJOB has invalid TASKLIST";
		error("wiki: STARTJOB has invalid TASKLIST: %s", tasklist);
		xfree(tasklist);
		return -1;
	}

	rc = _start_job(jobid, task_cnt, host_string, tasklist,
			err_code, err_msg);
	xfree(host_string);
	xfree(tasklist);
	if (rc == 0) {
		snprintf(reply_msg, sizeof(reply_msg),
			"job %u started successfully", jobid);
		*err_msg = reply_msg;
	}
	return rc;
}
Example #5
0
/*
 * get_nodes - get information on specific node(s) changed since some time
 * cmd_ptr IN   - CMD=GETNODES ARG=[<UPDATETIME>:<NODEID>[:<NODEID>]...]
 *                               [<UPDATETIME>:ALL]
 * err_code OUT - 0 or an error code
 * err_msg OUT  - response message
 * NOTE: xfree() err_msg if err_code is zero
 * RET 0 on success, -1 on failure
 *
 * Response format
 * ARG=<cnt>#<NODEID>:
 *	STATE=<state>;		 Moab equivalent node state
 *	[CAT=<reason>];		 Reason for a node being down or drained
 *				 colon separator
 *	CCLASS=<[part:cpus]>;	 SLURM partition with CPU count of node,
 *				 make have more than one partition
 *	[CPULOAD=<load_ave>;]	 One minute BSD load average
 *	[ARCH=<architecture>;]	 Computer architecture
 *	[OS=<operating_system>;] Operating system
 *	CMEMORY=<MB>;		 MB of memory on node
 *	CDISK=<MB>;		 MB of disk space on node
 *	CPROC=<cpus>;		 CPU count on node
 *	[FEATURE=<feature>;]	 Features associated with node, if any
 *	[GRES=<name>[:<count>],...;] generic resources on the node
 *  [#<NODEID>:...];
 */
extern int	get_nodes(char *cmd_ptr, int *err_code, char **err_msg)
{
	char *arg_ptr = NULL, *tmp_char = NULL, *tmp_buf = NULL, *buf = NULL;
	time_t update_time;
	/* Locks: read node, read partition */
	slurmctld_lock_t node_read_lock = {
		NO_LOCK, NO_LOCK, READ_LOCK, READ_LOCK };
	int node_rec_cnt = 0, buf_size = 0;

#ifdef HAVE_ALPS_CRAY
	/* Locks: write node */
	slurmctld_lock_t node_write_lock = {
		NO_LOCK, NO_LOCK, WRITE_LOCK, NO_LOCK };

	/*
	 * Run a Basil Inventory immediately before scheduling, to avoid
	 * race conditions caused by ALPS node state change (caused e.g.
	 * by the node health checker).
	 * This relies on the above write lock for the node state.
	 */
	lock_slurmctld(node_write_lock);
	if (select_g_reconfigure()) {
		unlock_slurmctld(node_write_lock);
		*err_code = -720;
		*err_msg = "Unable to run ALPS inventory";
		error("wiki: Unable to run ALPS inventory");
		return -1;
	}
	unlock_slurmctld(node_write_lock);
#endif

	arg_ptr = strstr(cmd_ptr, "ARG=");
	if (arg_ptr == NULL) {
		*err_code = -300;
		*err_msg = "GETNODES lacks ARG";
		error("wiki: GETNODES lacks ARG");
		return -1;
	}
	update_time = (time_t) strtoul(arg_ptr+4, &tmp_char, 10);
	if (tmp_char[0] != ':') {
		*err_code = -300;
		*err_msg = "Invalid ARG value";
		error("wiki: GETNODES has invalid ARG value");
		return -1;
	}
	tmp_char++;
	lock_slurmctld(node_read_lock);
	if (strncmp(tmp_char, "ALL", 3) == 0) {
		/* report all nodes */
		buf = _dump_all_nodes(&node_rec_cnt, update_time);
	} else {
		struct node_record *node_ptr = NULL;
		char *node_name, *slurm_hosts;
		int node_cnt;
		hostset_t slurm_hostset;

		slurm_hosts = moab2slurm_task_list(tmp_char, &node_cnt);
		if ((slurm_hostset = hostset_create(slurm_hosts))) {
			while ((node_name = hostset_shift(slurm_hostset))) {
				node_ptr = find_node_record(node_name);
				if (node_ptr == NULL) {
					error("sched/wiki2: bad hostname %s",
					      node_name);
					continue;
				}
				if (_hidden_node(node_ptr))
					continue;
				tmp_buf = _dump_node(node_ptr, NULL,
						     update_time);
				if (node_rec_cnt > 0)
					xstrcat(buf, "#");
				xstrcat(buf, tmp_buf);
				xfree(tmp_buf);
				node_rec_cnt++;
			}
			hostset_destroy(slurm_hostset);
		} else {
			error("hostset_create(%s): %m", slurm_hosts);
		}
		xfree(slurm_hosts);
	}
	unlock_slurmctld(node_read_lock);

	/* Prepend ("ARG=%d", node_rec_cnt) to reply message */
	if (buf)
		buf_size = strlen(buf);
	tmp_buf = xmalloc(buf_size + 32);
	if (node_rec_cnt)
		sprintf(tmp_buf, "SC=0 ARG=%d#%s", node_rec_cnt, buf);
	else
		sprintf(tmp_buf, "SC=0 ARG=0#");
	xfree(buf);
	*err_code = 0;
	*err_msg = tmp_buf;
	return 0;
}