+/*
+ * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * This program 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.
+ */
+
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <fcntl.h>
+
#include "procd.h"
#include "service.h"
#include "instance.h"
+#include "md5.h"
enum {
INSTANCE_ATTR_COMMAND,
INSTANCE_ATTR_ENV,
INSTANCE_ATTR_DATA,
+ INSTANCE_ATTR_NETDEV,
+ INSTANCE_ATTR_FILE,
+ INSTANCE_ATTR_TRIGGER,
+ INSTANCE_ATTR_NICE,
__INSTANCE_ATTR_MAX
};
[INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
[INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
[INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
+ [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
+ [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
+ [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
+ [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
+};
+
+struct instance_netdev {
+ struct blobmsg_list_node node;
+ int ifindex;
+};
+
+struct instance_file {
+ struct blobmsg_list_node node;
+ uint32_t md5[4];
};
+static void
+instance_run(struct service_instance *in)
+{
+ struct blobmsg_list_node *var;
+ struct blob_attr *cur;
+ char **argv;
+ int argc = 1; /* NULL terminated */
+ int rem;
+
+ if (in->nice)
+ setpriority(PRIO_PROCESS, 0, in->nice);
+
+ blobmsg_for_each_attr(cur, in->command, rem)
+ argc++;
+
+ blobmsg_list_for_each(&in->env, var)
+ setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
+
+ argv = alloca(sizeof(char *) * argc);
+ argc = 0;
+
+ blobmsg_for_each_attr(cur, in->command, rem)
+ argv[argc++] = blobmsg_data(cur);
+
+ argv[argc] = NULL;
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ close(STDERR_FILENO);
+ execvp(argv[0], argv);
+ exit(127);
+}
+
void
instance_start(struct service_instance *in)
{
+ int pid;
+
+ if (in->proc.pending)
+ return;
+
in->restart = false;
if (!in->valid)
return;
+
+ pid = fork();
+ if (pid < 0)
+ return;
+
+ if (!pid) {
+ instance_run(in);
+ return;
+ }
+
+ DEBUG(1, "Started instance %s::%s\n", in->srv->name, in->name);
+ in->proc.pid = pid;
+ uloop_process_add(&in->proc);
}
static void
struct service_instance *in;
in = container_of(p, struct service_instance, proc);
+ DEBUG(1, "Instance %s::%s exit with error code %d\n", in->srv->name, in->name, ret);
uloop_timeout_cancel(&in->timeout);
if (in->restart)
instance_start(in);
if (!blobmsg_list_equal(&in->data, &in_new->data))
return true;
+ if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
+ return true;
+
+ if (!blobmsg_list_equal(&in->file, &in_new->file))
+ return true;
+
+ if (in->nice != in_new->nice)
+ return true;
+
return false;
}
+static bool
+instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
+{
+ struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
+ struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
+
+ return n1->ifindex == n2->ifindex;
+}
+
+static void
+instance_netdev_update(struct blobmsg_list_node *l)
+{
+ struct instance_netdev *n = container_of(l, struct instance_netdev, node);
+
+ n->ifindex = if_nametoindex(n->node.avl.key);
+}
+
+static bool
+instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
+{
+ struct instance_file *f1 = container_of(l1, struct instance_file, node);
+ struct instance_file *f2 = container_of(l2, struct instance_file, node);
+
+ return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
+}
+
+static void
+instance_file_update(struct blobmsg_list_node *l)
+{
+ struct instance_file *f = container_of(l, struct instance_file, node);
+ md5_ctx_t md5;
+ char buf[256];
+ int len, fd;
+
+ memset(f->md5, 0, sizeof(f->md5));
+
+ fd = open(l->avl.key, O_RDONLY);
+ if (fd < 0)
+ return;
+
+ md5_begin(&md5);
+ do {
+ len = read(fd, buf, sizeof(buf));
+ if (len < 0) {
+ if (errno == EINTR)
+ continue;
+
+ break;
+ }
+ if (!len)
+ break;
+
+ md5_hash(buf, len, &md5);
+ } while(1);
+
+ md5_end(f->md5, &md5);
+ close(fd);
+}
+
+static bool
+instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
+{
+ struct blobmsg_list_node *node;
+
+ if (!cur)
+ return true;
+
+ if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
+ return false;
+
+ blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
+ if (cb) {
+ blobmsg_list_for_each(l, node)
+ cb(node);
+ }
+ return true;
+}
+
static bool
instance_config_parse(struct service_instance *in)
{
struct blob_attr *tb[__INSTANCE_ATTR_MAX];
- struct blob_attr *cur;
+ struct blob_attr *cur, *cur2;
+ int argc = 0;
+ int rem;
blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
blobmsg_data(in->config), blobmsg_data_len(in->config));
- if (!tb[INSTANCE_ATTR_COMMAND])
+
+ cur = tb[INSTANCE_ATTR_COMMAND];
+ if (!cur)
return false;
- if ((cur = tb[INSTANCE_ATTR_ENV]))
- blobmsg_list_fill(&in->env, blobmsg_data(cur), blobmsg_data_len(cur));
+ if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
+ return false;
- if ((cur = tb[INSTANCE_ATTR_DATA]))
- blobmsg_list_fill(&in->data, blobmsg_data(cur), blobmsg_data_len(cur));
+ blobmsg_for_each_attr(cur2, cur, rem) {
+ argc++;
+ break;
+ }
+ if (!argc)
+ return false;
+
+ in->command = cur;
+ in->trigger = tb[INSTANCE_ATTR_TRIGGER];
+
+ if (in->trigger) {
+ trigger_add(in->trigger, in);
+ }
+ if ((cur = tb[INSTANCE_ATTR_NICE])) {
+ in->nice = (int8_t) blobmsg_get_u32(cur);
+ if (in->nice < -20 || in->nice > 20)
+ return false;
+ }
+
+ if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
+ return false;
+
+ if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
+ return false;
+
+ if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
+ return false;
+
+ if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
+ return false;
return true;
}
{
blobmsg_list_free(&in->env);
blobmsg_list_free(&in->data);
+ blobmsg_list_free(&in->netdev);
}
static void
instance_config_cleanup(in);
blobmsg_list_move(&in->env, &in_src->env);
blobmsg_list_move(&in->data, &in_src->data);
+ blobmsg_list_move(&in->netdev, &in_src->netdev);
+ in->trigger = in_src->trigger;
in->command = in_src->command;
+ in->name = in_src->name;
+ in->node.avl.key = in_src->node.avl.key;
+
+ free(in->config);
+ in->config = in_src->config;
+ in_src->config = NULL;
}
bool
instance_update(struct service_instance *in, struct service_instance *in_new)
{
bool changed = instance_config_changed(in, in_new);
+ bool running = in->proc.pending;
- in->config = in_new->config;
- if (!changed)
+ if (!changed && running)
return false;
- in->restart = true;
- instance_stop(in, true);
- instance_config_move(in, in_new);
+ if (!running) {
+ if (changed)
+ instance_config_move(in, in_new);
+ instance_start(in);
+ } else {
+ in->restart = true;
+ instance_stop(in, true);
+ instance_config_move(in, in_new);
+ }
return true;
}
{
uloop_process_delete(&in->proc);
uloop_timeout_cancel(&in->timeout);
+ trigger_del(in);
instance_config_cleanup(in);
+ free(in->config);
free(in);
}
void
-instance_init(struct service_instance *in, struct blob_attr *config)
+instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
{
+ config = blob_memdup(config);
+ in->srv = s;
+ in->name = blobmsg_name(config);
in->config = config;
in->timeout.cb = instance_timeout;
in->proc.cb = instance_exit;
+ blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
+ blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
blobmsg_list_simple_init(&in->env);
blobmsg_list_simple_init(&in->data);
in->valid = instance_config_parse(in);
}
+void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
+{
+ void *i;
+ i = blobmsg_open_table(b, in->name);
+ blobmsg_add_u8(b, "running", in->proc.pending);
+ if (in->proc.pending)
+ blobmsg_add_u32(b, "pid", in->proc.pid);
+ blobmsg_add_blob(b, in->command);
+ if (verbose && in->trigger)
+ blobmsg_add_blob(b, in->trigger);
+ blobmsg_close_table(b, i);
+}