X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fprocd.git;a=blobdiff_plain;f=instance.c;h=b2cdfa1dd57397d4e36d7886d8f5bafa5e710f23;hp=8c3af4b45c0016b2fe2df07c0a8f65a85343c418;hb=8158e9052afbf2ee47de645167b90b6e7fc7d86d;hpb=14447cd46a3c6ad3f5b08e921b39a694b4ad14b0 diff --git a/instance.c b/instance.c index 8c3af4b..b2cdfa1 100644 --- a/instance.c +++ b/instance.c @@ -1,11 +1,37 @@ +/* + * Copyright (C) 2013 Felix Fietkau + * Copyright (C) 2013 John Crispin + * + * 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 +#include +#include +#include +#include +#include +#include + #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_NICE, __INSTANCE_ATTR_MAX }; @@ -13,12 +39,74 @@ static const struct blobmsg_policy instance_attr[__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_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; + 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 @@ -38,6 +126,7 @@ instance_exit(struct uloop_process *p, int ret) struct service_instance *in; in = container_of(p, struct service_instance, proc); + LOG("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); @@ -67,25 +156,140 @@ instance_config_changed(struct service_instance *in, struct service_instance *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; + + blobmsg_for_each_attr(cur2, cur, rem) { + argc++; + break; + } + if (!argc) + return false; - if ((cur = tb[INSTANCE_ATTR_DATA])) - blobmsg_list_fill(&in->data, blobmsg_data(cur), blobmsg_data_len(cur)); + in->command = cur; + + 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; } @@ -95,6 +299,7 @@ instance_config_cleanup(struct service_instance *in) { blobmsg_list_free(&in->env); blobmsg_list_free(&in->data); + blobmsg_list_free(&in->netdev); } static void @@ -103,7 +308,14 @@ instance_config_move(struct service_instance *in, struct service_instance *in_sr 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->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 @@ -111,10 +323,10 @@ instance_update(struct service_instance *in, struct service_instance *in_new) { bool changed = instance_config_changed(in, in_new); - in->config = in_new->config; if (!changed) return false; + in->restart = true; instance_stop(in, true); instance_config_move(in, in_new); return true; @@ -126,19 +338,35 @@ instance_free(struct service_instance *in) uloop_process_delete(&in->proc); uloop_timeout_cancel(&in->timeout); 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) +{ + 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); + blobmsg_close_table(b, i); +}