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-rw-r--r--service/instance.c750
1 files changed, 0 insertions, 750 deletions
diff --git a/service/instance.c b/service/instance.c
deleted file mode 100644
index 0949c0f..0000000
--- a/service/instance.c
+++ /dev/null
@@ -1,750 +0,0 @@
-/*
- * Copyright (C) 2015 Matthias Schiffer <mschiffer@universe-factory.net>
- *
- * Based on "procd" by:
- * 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.
- */
-
-#define _GNU_SOURCE
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <net/if.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <pwd.h>
-#include <libgen.h>
-#include <unistd.h>
-
-#include <libubox/md5.h>
-
-#include "../unitd.h"
-
-#include "service.h"
-#include "instance.h"
-
-
-enum {
- INSTANCE_ATTR_COMMAND,
- INSTANCE_ATTR_ENV,
- INSTANCE_ATTR_DATA,
- INSTANCE_ATTR_NETDEV,
- INSTANCE_ATTR_FILE,
- INSTANCE_ATTR_RESPAWN,
- INSTANCE_ATTR_NICE,
- INSTANCE_ATTR_LIMITS,
- INSTANCE_ATTR_ERROR,
- INSTANCE_ATTR_USER,
- INSTANCE_ATTR_STDOUT,
- INSTANCE_ATTR_STDERR,
- __INSTANCE_ATTR_MAX
-};
-
-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_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
- [INSTANCE_ATTR_LIMITS] = { "limits", BLOBMSG_TYPE_TABLE },
- [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING },
- [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL },
- [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL },
-};
-
-struct instance_netdev {
- struct blobmsg_list_node node;
- int ifindex;
-};
-
-struct instance_file {
- struct blobmsg_list_node node;
- uint32_t md5[4];
-};
-
-struct rlimit_name {
- const char *name;
- int resource;
-};
-
-static const struct rlimit_name rlimit_names[] = {
- { "as", RLIMIT_AS },
- { "core", RLIMIT_CORE },
- { "cpu", RLIMIT_CPU },
- { "data", RLIMIT_DATA },
- { "fsize", RLIMIT_FSIZE },
- { "memlock", RLIMIT_MEMLOCK },
- { "msgqueue", RLIMIT_MSGQUEUE },
- { "nice", RLIMIT_NICE },
- { "nofile", RLIMIT_NOFILE },
- { "nproc", RLIMIT_NPROC },
- { "rss", RLIMIT_RSS },
- { "rtprio", RLIMIT_RTPRIO },
- { "sigpending", RLIMIT_SIGPENDING },
- { "stack", RLIMIT_STACK },
- { NULL, 0 }
-};
-
-static void closefd(int fd)
-{
- if (fd > STDERR_FILENO)
- close(fd);
-}
-
-static void
-instance_limits(const char *limit, const char *value)
-{
- int i;
- struct rlimit rlim;
- unsigned long cur, max;
-
- for (i = 0; rlimit_names[i].name != NULL; i++) {
- if (strcmp(rlimit_names[i].name, limit))
- continue;
- if (!strcmp(value, "unlimited")) {
- rlim.rlim_cur = RLIM_INFINITY;
- rlim.rlim_max = RLIM_INFINITY;
- } else {
- if (getrlimit(rlimit_names[i].resource, &rlim))
- return;
-
- cur = rlim.rlim_cur;
- max = rlim.rlim_max;
-
- if (sscanf(value, "%lu %lu", &cur, &max) < 1)
- return;
-
- rlim.rlim_cur = cur;
- rlim.rlim_max = max;
- }
-
- setrlimit(rlimit_names[i].resource, &rlim);
- return;
- }
-}
-
-static void
-instance_run(struct service_instance *in, int _stdout, int _stderr)
-{
- struct blobmsg_list_node *var;
- struct blob_attr *cur;
- char **argv;
- int argc = 1; /* NULL terminated */
- int rem, _stdin;
-
- 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);
-
- blobmsg_list_for_each(&in->limits, var)
- instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
-
- argv = alloca(sizeof(char *) * argc);
- argc = 0;
-
- blobmsg_for_each_attr(cur, in->command, rem)
- argv[argc++] = blobmsg_data(cur);
-
- argv[argc] = NULL;
-
- _stdin = open("/dev/null", O_RDONLY);
-
- if (_stdout == -1)
- _stdout = open("/dev/null", O_WRONLY);
-
- if (_stderr == -1)
- _stderr = open("/dev/null", O_WRONLY);
-
- if (_stdin > -1) {
- dup2(_stdin, STDIN_FILENO);
- closefd(_stdin);
- }
- if (_stdout > -1) {
- dup2(_stdout, STDOUT_FILENO);
- closefd(_stdout);
- }
- if (_stderr > -1) {
- dup2(_stderr, STDERR_FILENO);
- closefd(_stderr);
- }
-
- if (in->gid && setgid(in->gid)) {
- ERROR("failed to set group id %d: %d (%s)\n", in->gid, errno, strerror(errno));
- exit(127);
- }
- if (in->uid && setuid(in->uid)) {
- ERROR("failed to set user id %d: %d (%s)\n", in->uid, errno, strerror(errno));
- exit(127);
- }
-
- execvp(argv[0], argv);
- exit(127);
-}
-
-static void
-instance_free_stdio(struct service_instance *in)
-{
- if (in->_stdout.fd.fd > -1) {
- ustream_free(&in->_stdout.stream);
- close(in->_stdout.fd.fd);
- in->_stdout.fd.fd = -1;
- }
-
- if (in->_stderr.fd.fd > -1) {
- ustream_free(&in->_stderr.stream);
- close(in->_stderr.fd.fd);
- in->_stderr.fd.fd = -1;
- }
-}
-
-void
-instance_start(struct service_instance *in)
-{
- int pid;
- int opipe[2] = { -1, -1 };
- int epipe[2] = { -1, -1 };
-
- if (!avl_is_empty(&in->errors.avl)) {
- LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
- return;
- }
-
- if (in->proc.pending)
- return;
-
- instance_free_stdio(in);
- if (in->_stdout.fd.fd > -2) {
- if (pipe(opipe)) {
- ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
- opipe[0] = opipe[1] = -1;
- }
- }
-
- if (in->_stderr.fd.fd > -2) {
- if (pipe(epipe)) {
- ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
- epipe[0] = epipe[1] = -1;
- }
- }
-
- in->restart = false;
- in->halt = !in->respawn;
-
- if (!in->valid)
- return;
-
- pid = fork();
- if (pid < 0)
- return;
-
- if (!pid) {
- uloop_done();
- closefd(opipe[0]);
- closefd(epipe[0]);
- instance_run(in, opipe[1], epipe[1]);
- return;
- }
-
- DEBUG(2, "Started instance %s::%s\n", in->srv->name, in->name);
- in->proc.pid = pid;
- clock_gettime(CLOCK_MONOTONIC, &in->start);
- uloop_process_add(&in->proc);
-
- if (opipe[0] > -1) {
- ustream_fd_init(&in->_stdout, opipe[0]);
- closefd(opipe[1]);
- }
-
- if (epipe[0] > -1) {
- ustream_fd_init(&in->_stderr, epipe[0]);
- closefd(epipe[1]);
- }
-
- service_event("instance.start", in->srv->name, in->name);
-}
-
-static void
-instance_stdio(struct ustream *s, int prio, struct service_instance *in)
-{
- char *newline, *str, *arg0, ident[32];
- int len;
-
- arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
- snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
- ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
-
- do {
- str = ustream_get_read_buf(s, NULL);
- if (!str)
- break;
-
- newline = strchr(str, '\n');
- if (!newline)
- break;
-
- *newline = 0;
- ulog(prio, "%s\n", str);
-
- len = newline + 1 - str;
- ustream_consume(s, len);
- } while (1);
-
- ulog_open(ULOG_SYSLOG, LOG_DAEMON, "unitd");
-}
-
-static void
-instance_stdout(struct ustream *s, int bytes)
-{
- instance_stdio(s, LOG_INFO,
- container_of(s, struct service_instance, _stdout.stream));
-}
-
-static void
-instance_stderr(struct ustream *s, int bytes)
-{
- instance_stdio(s, LOG_ERR,
- container_of(s, struct service_instance, _stderr.stream));
-}
-
-static void
-instance_timeout(struct uloop_timeout *t)
-{
- struct service_instance *in;
-
- in = container_of(t, struct service_instance, timeout);
-
- if (!in->halt && (in->restart || in->respawn))
- instance_start(in);
-}
-
-static void
-instance_exit(struct uloop_process *p, int ret)
-{
- struct service_instance *in;
- struct timespec tp;
- long runtime;
-
- in = container_of(p, struct service_instance, proc);
-
- clock_gettime(CLOCK_MONOTONIC, &tp);
- runtime = tp.tv_sec - in->start.tv_sec;
-
- DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
-
- uloop_timeout_cancel(&in->timeout);
- if (in->halt) {
- /* no action */
- } else if (in->restart) {
- instance_start(in);
- } else if (in->respawn) {
- if (runtime < in->respawn_threshold)
- in->respawn_count++;
- else
- in->respawn_count = 0;
- if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
- LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
- in->srv->name, in->name, in->respawn_count, runtime);
- in->restart = in->respawn = 0;
- in->halt = 1;
- } else {
- uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
- }
- }
- service_event("instance.stop", in->srv->name, in->name);
-}
-
-void
-instance_stop(struct service_instance *in)
-{
- if (!in->proc.pending)
- return;
- in->halt = true;
- in->restart = in->respawn = false;
- kill(in->proc.pid, SIGTERM);
-}
-
-static void
-instance_restart(struct service_instance *in)
-{
- if (!in->proc.pending)
- return;
- in->halt = false;
- in->restart = true;
- kill(in->proc.pid, SIGTERM);
-}
-
-static bool
-instance_config_changed(struct service_instance *in, struct service_instance *in_new)
-{
- if (!in->valid)
- return true;
-
- if (!blob_attr_equal(in->command, in_new->command))
- return true;
-
- if (!blobmsg_list_equal(&in->env, &in_new->env))
- return true;
-
- 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;
-
- if (in->uid != in_new->uid)
- return true;
-
- if (in->gid != in_new->gid)
- return true;
-
- if (!blobmsg_list_equal(&in->limits, &in_new->limits))
- return true;
-
- if (!blobmsg_list_equal(&in->errors, &in_new->errors))
- 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 void
-instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
-{
- if (!cur)
- return;
-
- blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
-}
-
-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, *cur2;
- int argc = 0;
- int rem;
-
- blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
- blobmsg_data(in->config), blobmsg_data_len(in->config));
-
- cur = tb[INSTANCE_ATTR_COMMAND];
- if (!cur)
- return false;
-
- if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
- return false;
-
- blobmsg_for_each_attr(cur2, cur, rem) {
- argc++;
- break;
- }
- if (!argc)
- return false;
-
- in->command = cur;
-
- if (tb[INSTANCE_ATTR_RESPAWN]) {
- int i = 0;
- uint32_t vals[3] = { 3600, 5, 5};
-
- blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
- if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
- continue;
- vals[i] = atoi(blobmsg_get_string(cur2));
- i++;
- }
- in->respawn = true;
- in->respawn_count = 0;
- in->respawn_threshold = vals[0];
- in->respawn_timeout = vals[1];
- in->respawn_retry = vals[2];
- }
-
- if ((cur = tb[INSTANCE_ATTR_NICE])) {
- in->nice = (int8_t) blobmsg_get_u32(cur);
- if (in->nice < -20 || in->nice > 20)
- return false;
- }
-
- if (tb[INSTANCE_ATTR_USER]) {
- struct passwd *p = getpwnam(blobmsg_get_string(tb[INSTANCE_ATTR_USER]));
- if (p) {
- in->uid = p->pw_uid;
- in->gid = p->pw_gid;
- }
- }
-
- if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
- in->_stdout.fd.fd = -1;
-
- if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
- in->_stderr.fd.fd = -1;
-
- instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
-
- if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], 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;
-
- if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
- return false;
-
- if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
- return false;
-
- return true;
-}
-
-static void
-instance_config_cleanup(struct service_instance *in)
-{
- blobmsg_list_free(&in->env);
- blobmsg_list_free(&in->data);
- blobmsg_list_free(&in->netdev);
- blobmsg_list_free(&in->file);
- blobmsg_list_free(&in->limits);
- blobmsg_list_free(&in->errors);
-}
-
-static void
-instance_config_move(struct service_instance *in, struct service_instance *in_src)
-{
- 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);
- blobmsg_list_move(&in->file, &in_src->file);
- blobmsg_list_move(&in->limits, &in_src->limits);
- blobmsg_list_move(&in->errors, &in_src->errors);
- 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;
-
- if (!changed && running)
- return false;
-
- if (!running) {
- if (changed)
- instance_config_move(in, in_new);
- instance_start(in);
- } else {
- instance_restart(in);
- instance_config_move(in, in_new);
- /* restart happens in the child callback handler */
- }
- return true;
-}
-
-void
-instance_free(struct service_instance *in)
-{
- instance_free_stdio(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 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;
-
- in->_stdout.fd.fd = -2;
- in->_stdout.stream.string_data = true;
- in->_stdout.stream.notify_read = instance_stdout;
-
- in->_stderr.fd.fd = -2;
- in->_stderr.stream.string_data = true;
- in->_stderr.stream.notify_read = instance_stderr;
-
- 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);
- blobmsg_list_simple_init(&in->limits);
- blobmsg_list_simple_init(&in->errors);
- in->valid = instance_config_parse(in);
-}
-
-void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
-{
- void *i;
-
- if (!in->valid)
- return;
-
- 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 (!avl_is_empty(&in->errors.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_array(b, "errors");
- blobmsg_list_for_each(&in->errors, var)
- blobmsg_add_string(b, NULL, blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
-
- if (!avl_is_empty(&in->env.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "env");
- blobmsg_list_for_each(&in->env, var)
- blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
-
- if (!avl_is_empty(&in->data.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "data");
- blobmsg_list_for_each(&in->data, var)
- blobmsg_add_blob(b, var->data);
- blobmsg_close_table(b, e);
- }
-
- if (!avl_is_empty(&in->limits.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "limits");
- blobmsg_list_for_each(&in->limits, var)
- blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
-
- if (in->respawn) {
- void *r = blobmsg_open_table(b, "respawn");
- blobmsg_add_u32(b, "threshold", in->respawn_threshold);
- blobmsg_add_u32(b, "timeout", in->respawn_timeout);
- blobmsg_add_u32(b, "retry", in->respawn_retry);
- blobmsg_close_table(b, r);
- }
-
- blobmsg_close_table(b, i);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 00:17:56 +0100