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services.c
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/*
* Copyright (C) 2010 Andrew Beekhof <andrew@beekhof.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <crm_internal.h>
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include "crm/crm.h"
#include "crm/common/mainloop.h"
#include "crm/services.h"
#include "services_private.h"
/* TODO: Develop a rollover strategy */
static int operations = 0;
GHashTable *recurring_actions = NULL;
svc_action_t *
services_action_create(const char *name, const char *action, int interval,
int timeout)
{
return resources_action_create(name, "lsb", NULL, name, action, interval, timeout, NULL);
}
svc_action_t *resources_action_create(
const char *name, const char *standard, const char *provider, const char *agent,
const char *action, int interval, int timeout, GHashTable *params)
{
svc_action_t *op;
/*
* Do some up front sanity checks before we go off and
* build the svc_action_t instance.
*/
if (crm_strlen_zero(name)) {
crm_err("A service or resource action must have a name.");
return NULL;
}
if (crm_strlen_zero(standard)) {
crm_err("A service action must have a valid standard.");
return NULL;
}
if (!strcasecmp(standard, "ocf") && crm_strlen_zero(provider)) {
crm_err("An OCF resource action must have a provider.");
return NULL;
}
if (crm_strlen_zero(agent)) {
crm_err("A service or resource action must have an agent.");
return NULL;
}
if (crm_strlen_zero(action)) {
crm_err("A service or resource action must specify an action.");
return NULL;
}
/*
* Sanity checks passed, proceed!
*/
op = calloc(1, sizeof(svc_action_t));
op->opaque = calloc(1, sizeof(svc_action_private_t));
op->rsc = strdup(name);
op->action = strdup(action);
op->interval = interval;
op->timeout = timeout;
op->standard = strdup(standard);
op->agent = strdup(agent);
op->sequence = ++operations;
if (asprintf(&op->id, "%s_%s_%d", name, action, interval) == -1) {
goto return_error;
}
if(strcasecmp(standard, "ocf") == 0) {
op->provider = strdup(provider);
op->params = params;
if (asprintf(&op->opaque->exec, "%s/resource.d/%s/%s",
OCF_ROOT_DIR, provider, agent) == -1) {
goto return_error;
}
op->opaque->args[0] = strdup(op->opaque->exec);
op->opaque->args[1] = strdup(action);
} else if(strcasecmp(standard, "lsb") == 0) {
if (op->agent[0] == '/') {
/* if given an absolute path, use that instead
* of tacking on the LSB_ROOT_DIR path to the front */
op->opaque->exec = crm_strdup(op->agent);
} else if (asprintf(&op->opaque->exec, "%s/%s", LSB_ROOT_DIR, op->agent) == -1) {
goto return_error;
}
op->opaque->args[0] = strdup(op->opaque->exec);
op->opaque->args[1] = strdup(op->action);
op->opaque->args[2] = NULL;
} else if(strcasecmp(standard, "systemd") == 0) {
char *service;
op->opaque->exec = strdup(SYSTEMCTL);
op->opaque->args[0] = strdup(SYSTEMCTL);
op->opaque->args[1] = strdup(action);
if (asprintf(&service, "%s.service", agent) == -1) {
goto return_error;
}
op->opaque->args[2] = service;
} else if(strcasecmp(standard, "service") == 0) {
op->opaque->exec = strdup(SERVICE_SCRIPT);
op->opaque->args[0] = strdup(SERVICE_SCRIPT);
op->opaque->args[1] = strdup(agent);
op->opaque->args[2] = strdup(action);
} else {
crm_err("Unknown resource standard: %s", standard);
services_action_free(op);
op = NULL;
}
return op;
return_error:
services_action_free(op);
return NULL;
}
svc_action_t *
services_action_create_generic(const char *exec, const char *args[])
{
svc_action_t *op;
unsigned int cur_arg;
op = calloc(1, sizeof(*op));
op->opaque = calloc(1, sizeof(svc_action_private_t));
op->opaque->exec = strdup(exec);
op->opaque->args[0] = strdup(exec);
for (cur_arg = 1; args && args[cur_arg - 1]; cur_arg++) {
op->opaque->args[cur_arg] = strdup(args[cur_arg - 1]);
if (cur_arg == DIMOF(op->opaque->args) - 1) {
crm_err("svc_action_t args list not long enough for '%s' execution request.", exec);
break;
}
}
return op;
}
void
services_action_free(svc_action_t *op)
{
unsigned int i;
if (op == NULL) {
return;
}
if (op->opaque->stderr_gsource) {
mainloop_del_fd(op->opaque->stderr_gsource);
op->opaque->stderr_gsource = NULL;
}
if (op->opaque->stdout_gsource) {
mainloop_del_fd(op->opaque->stdout_gsource);
op->opaque->stdout_gsource = NULL;
}
free(op->id);
free(op->opaque->exec);
for (i = 0; i < DIMOF(op->opaque->args); i++) {
free(op->opaque->args[i]);
}
free(op->rsc);
free(op->action);
free(op->standard);
free(op->agent);
free(op->provider);
free(op->stdout_data);
free(op->stderr_data);
if (op->params) {
g_hash_table_destroy(op->params);
op->params = NULL;
}
free(op);
}
gboolean
cancel_recurring_action(svc_action_t *op)
{
if (op->pid) {
return FALSE;
}
crm_info("Cancelling operation %s", op->id);
if (recurring_actions) {
g_hash_table_remove(recurring_actions, op->id);
}
if (op->opaque->repeat_timer) {
g_source_remove(op->opaque->repeat_timer);
}
return TRUE;
}
gboolean
services_action_cancel(const char *name, const char *action, int interval)
{
svc_action_t* op = NULL;
char id[512];
snprintf(id, sizeof(id), "%s_%s_%d", name, action, interval);
if (!(op = g_hash_table_lookup(recurring_actions, id))) {
return FALSE;
}
if (cancel_recurring_action(op)) {
op->status = PCMK_LRM_OP_CANCELLED;
if (op->opaque->callback) {
op->opaque->callback(op);
}
services_action_free(op);
} else {
crm_info("Cancelling op: %s will occur once operation completes", id);
op->cancel = 1;
}
return TRUE;
}
gboolean
services_action_async(svc_action_t* op, void (*action_callback)(svc_action_t *))
{
if (action_callback) {
op->opaque->callback = action_callback;
}
if (recurring_actions == NULL) {
recurring_actions = g_hash_table_new_full(g_str_hash, g_str_equal,
NULL, NULL);
}
if (op->interval > 0) {
g_hash_table_replace(recurring_actions, op->id, op);
}
return services_os_action_execute(op, FALSE);
}
gboolean
services_action_sync(svc_action_t* op)
{
gboolean rc = services_os_action_execute(op, TRUE);
crm_trace(" > %s_%s_%d: %s = %d", op->rsc, op->action, op->interval,
op->opaque->exec, op->rc);
if (op->stdout_data) {
crm_trace(" > stdout: %s", op->stdout_data);
}
if (op->stderr_data) {
crm_trace(" > stderr: %s", op->stderr_data);
}
return rc;
}
GList *
get_directory_list(const char *root, gboolean files)
{
return services_os_get_directory_list(root, files);
}
GList *
services_list(void)
{
return resources_list_agents("lsb", NULL);
}
GList *
resources_list_standards(void)
{
GList *standards = NULL;
standards = g_list_append(standards, strdup("ocf"));
standards = g_list_append(standards, strdup("lsb"));
if (g_file_test(SYSTEMCTL, G_FILE_TEST_IS_REGULAR)) {
standards = g_list_append(standards, strdup("systemd"));
}
if (g_file_test(SERVICE_SCRIPT, G_FILE_TEST_IS_REGULAR)) {
standards = g_list_append(standards, strdup("service"));
}
return standards;
}
GList *
resources_list_providers(const char *standard)
{
if (strcasecmp(standard, "ocf") == 0) {
return resources_os_list_ocf_providers();
}
return NULL;
}
GList *
resources_list_agents(const char *standard, const char *provider)
{
if (strcasecmp(standard, "ocf") == 0) {
return resources_os_list_ocf_agents(provider);
} else if (strcasecmp(standard, "lsb") == 0) {
return resources_os_list_lsb_agents();
} else if (strcasecmp(standard, "systemd") == 0) {
return resources_os_list_systemd_services();
} else if (strcasecmp(standard, "service") == 0) {
GList *tmp1 = resources_os_list_lsb_agents();
GList *tmp2 = resources_os_list_systemd_services();
return g_list_concat(tmp1, tmp2);
}
return NULL;
}
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