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-rw-r--r--server/monitor/monitor.c355
-rw-r--r--server/monitor/monitor.h4
-rw-r--r--server/monitor/monitor_interfaces.h1
3 files changed, 234 insertions, 126 deletions
diff --git a/server/monitor/monitor.c b/server/monitor/monitor.c
index 8ecb8733..1247842f 100644
--- a/server/monitor/monitor.c
+++ b/server/monitor/monitor.c
@@ -81,6 +81,24 @@ struct mt_svc {
struct tevent_timer *ping_ev;
};
+struct config_file_callback {
+ int wd;
+ int retries;
+ monitor_reconf_fn fn;
+ char *filename;
+ time_t modified;
+ struct config_file_callback *next;
+ struct config_file_callback *prev;
+};
+
+struct config_file_ctx {
+ TALLOC_CTX *parent_ctx;
+ struct tevent_timer *timer;
+ bool needs_update;
+ struct mt_ctx *mt_ctx;
+ struct config_file_callback *callbacks;
+};
+
struct mt_ctx {
struct tevent_context *ev;
struct confdb_ctx *cdb;
@@ -90,24 +108,11 @@ struct mt_ctx {
char **services;
struct mt_svc *svc_list;
struct sbus_srv_ctx *sbus_srv;
-
+ struct config_file_ctx *file_ctx;
+ int inotify_fd;
int service_id_timeout;
};
-struct config_file_ctx {
- TALLOC_CTX *parent_ctx;
- struct confdb_ctx *cdb;
- struct tevent_context *ev;
- int fd;
- int retries;
- int wd;
- char *filename;
- time_t modified;
- bool needs_update;
- confdb_reconf_fn reconf_fn;
- void *reconf_pvt;
-};
-
static int start_service(struct mt_svc *mt_svc);
static int dbus_service_init(struct sbus_conn_ctx *conn_ctx, void *data);
@@ -129,7 +134,8 @@ static int get_provider_config(struct mt_ctx *ctx, const char *name,
static int add_new_service(struct mt_ctx *ctx, const char *name);
static int add_new_provider(struct mt_ctx *ctx, const char *name);
-static int monitor_signal_reconf(struct config_file_ctx *file_ctx);
+static int monitor_signal_reconf(struct config_file_ctx *file_ctx,
+ const char *filename);
static int update_monitor_config(struct mt_ctx *ctx);
static int monitor_cleanup(void);
@@ -509,14 +515,14 @@ done:
dbus_message_unref(reply);
}
-static int monitor_signal_reconf(struct config_file_ctx *file_ctx)
+static int monitor_signal_reconf(struct config_file_ctx *file_ctx,
+ const char *filename)
{
int ret;
- struct mt_ctx *ctx = talloc_get_type(file_ctx->reconf_pvt, struct mt_ctx);
DEBUG(1, ("Configuration has changed. Reloading.\n"));
/* Update the confdb configuration */
- ret = confdb_init_db(file_ctx->filename, file_ctx->cdb);
+ ret = confdb_init_db(filename, file_ctx->mt_ctx->cdb);
if (ret != EOK) {
DEBUG(0, ("Could not reload configuration!"));
kill(getpid(), SIGTERM);
@@ -524,10 +530,24 @@ static int monitor_signal_reconf(struct config_file_ctx *file_ctx)
}
/* Update the monitor's configuration and signal children */
- return update_monitor_config(ctx);
+ return update_monitor_config(file_ctx->mt_ctx);
}
-static int service_signal_reload(struct mt_svc *svc)
+static int service_signal_dns_reload(struct mt_svc *svc);
+int monitor_update_resolv(struct config_file_ctx *file_ctx,
+ const char *filename)
+{
+ struct mt_svc *cur_svc;
+ DEBUG(2, ("Resolv.conf has been updated. Reloading.\n"));
+
+ /* Signal all services to reload their DNS configuration */
+ for(cur_svc = file_ctx->mt_ctx->svc_list; cur_svc; cur_svc = cur_svc->next) {
+ service_signal_dns_reload(cur_svc);
+ }
+ return EOK;
+}
+
+static int service_signal(struct mt_svc *svc, const char *svc_signal)
{
DBusMessage *msg;
dbus_bool_t dbret;
@@ -544,7 +564,7 @@ static int service_signal_reload(struct mt_svc *svc)
* order a service to reload that hasn't started
* yet.
*/
- DEBUG(1,("Could not reload service [%s].\n", svc->name));
+ DEBUG(1,("Could not signal service [%s].\n", svc->name));
return EIO;
}
@@ -552,7 +572,7 @@ static int service_signal_reload(struct mt_svc *svc)
msg = dbus_message_new_method_call(NULL,
SERVICE_PATH,
SERVICE_INTERFACE,
- SERVICE_METHOD_RELOAD);
+ svc_signal);
if (!msg) {
DEBUG(0,("Out of memory?!\n"));
monitor_kill_service(svc);
@@ -577,6 +597,15 @@ static int service_signal_reload(struct mt_svc *svc)
return EOK;
}
+static int service_signal_reload(struct mt_svc *svc)
+{
+ return service_signal(svc, SERVICE_METHOD_RELOAD);
+}
+static int service_signal_dns_reload(struct mt_svc *svc)
+{
+ return service_signal(svc, SERVICE_METHOD_RES_INIT);
+}
+
static int check_domain_ranges(struct sss_domain_info *domains)
{
struct sss_domain_info *dom = domains, *other = NULL;
@@ -1210,6 +1239,10 @@ static void config_file_changed(struct tevent_context *ev,
file_ctx->needs_update = 1;
}
+struct rewatch_ctx {
+ struct config_file_callback *cb;
+ struct config_file_ctx *file_ctx;
+};
static void rewatch_config_file(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval t, void *ptr);
@@ -1224,6 +1257,8 @@ static void process_config_file(struct tevent_context *ev,
ssize_t len, total_len;
ssize_t event_size;
struct config_file_ctx *file_ctx;
+ struct config_file_callback *cb;
+ struct rewatch_ctx *rw_ctx;
event_size = sizeof(struct inotify_event);
file_ctx = talloc_get_type(ptr, struct config_file_ctx);
@@ -1241,7 +1276,8 @@ static void process_config_file(struct tevent_context *ev,
total_len = 0;
while (total_len < event_size) {
- len = read(file_ctx->fd, buf+total_len, event_size-total_len);
+ len = read(file_ctx->mt_ctx->inotify_fd, buf+total_len,
+ event_size-total_len);
if (len == -1 && errno != EINTR) {
DEBUG(0, ("Critical error reading inotify file descriptor.\n"));
talloc_free(tmp_ctx);
@@ -1259,7 +1295,7 @@ static void process_config_file(struct tevent_context *ev,
name = talloc_size(tmp_ctx, len);
total_len = 0;
while (total_len < in_event->len) {
- len = read(file_ctx->fd, &name, in_event->len);
+ len = read(file_ctx->mt_ctx->inotify_fd, &name, in_event->len);
if (len == -1 && errno != EINTR) {
DEBUG(0, ("Critical error reading inotify file descriptor.\n"));
talloc_free(tmp_ctx);
@@ -1271,6 +1307,16 @@ static void process_config_file(struct tevent_context *ev,
talloc_free(tmp_ctx);
+ for (cb = file_ctx->callbacks; cb; cb = cb->next) {
+ if (cb->wd == in_event->wd) {
+ break;
+ }
+ }
+ if (!cb) {
+ DEBUG(0, ("Unknown watch descriptor\n"));
+ return;
+ }
+
if (in_event->mask & IN_IGNORED) {
/* Some text editors will move a new file on top of the
* existing one instead of modifying it. In this case,
@@ -1283,18 +1329,28 @@ static void process_config_file(struct tevent_context *ev,
tv.tv_sec = t.tv_sec+5;
tv.tv_usec = t.tv_usec;
- file_ctx->retries = 0;
- tev = tevent_add_timer(ev, ev, tv, rewatch_config_file, file_ctx);
+ cb->retries = 0;
+ rw_ctx = talloc(file_ctx, struct rewatch_ctx);
+ if(!rw_ctx) {
+ DEBUG(0, ("Could not restore inotify watch. Quitting!\n"));
+ close(file_ctx->mt_ctx->inotify_fd);
+ kill(getpid(), SIGTERM);
+ return;
+ }
+ rw_ctx->cb = cb;
+ rw_ctx->file_ctx = file_ctx;
+
+ tev = tevent_add_timer(ev, ev, tv, rewatch_config_file, rw_ctx);
if (te == NULL) {
DEBUG(0, ("Could not restore inotify watch. Quitting!\n"));
- close(file_ctx->fd);
+ close(file_ctx->mt_ctx->inotify_fd);
kill(getpid(), SIGTERM);
}
return;
}
/* Tell the monitor to signal the children */
- file_ctx->reconf_fn(file_ctx);
+ cb->fn(file_ctx, cb->filename);
file_ctx->needs_update = 0;
}
@@ -1305,42 +1361,50 @@ static void rewatch_config_file(struct tevent_context *ev,
int err;
struct tevent_timer *tev = NULL;
struct timeval tv;
+ struct config_file_callback *cb;
+ struct rewatch_ctx *rw_ctx;
struct config_file_ctx *file_ctx;
- file_ctx = talloc_get_type(ptr, struct config_file_ctx);
- file_ctx->retries++;
+
+ rw_ctx = talloc_get_type(ptr, struct rewatch_ctx);
+
+ cb = rw_ctx->cb;
+ file_ctx = rw_ctx->file_ctx;
/* Retry six times at five-second intervals before giving up */
- if (file_ctx->retries > 6) {
+ cb->retries++;
+ if (cb->retries > 6) {
DEBUG(0, ("Could not restore inotify watch. Quitting!\n"));
- close(file_ctx->fd);
+ close(file_ctx->mt_ctx->inotify_fd);
kill(getpid(), SIGTERM);
}
- file_ctx->wd = inotify_add_watch(file_ctx->fd, file_ctx->filename,
- IN_MODIFY);
- if (file_ctx->wd < 0) {
+ cb->wd = inotify_add_watch(file_ctx->mt_ctx->inotify_fd,
+ cb->filename, IN_MODIFY);
+ if (cb->wd < 0) {
err = errno;
tv.tv_sec = t.tv_sec+5;
tv.tv_usec = t.tv_usec;
DEBUG(1, ("Could not add inotify watch for file [%s]. Error [%d:%s]\n",
- file_ctx->filename, err, strerror(err)));
+ cb->filename, err, strerror(err)));
- tev = tevent_add_timer(ev, ev, tv, rewatch_config_file, file_ctx);
+ tev = tevent_add_timer(ev, ev, tv, rewatch_config_file, rw_ctx);
if (te == NULL) {
DEBUG(0, ("Could not restore inotify watch. Quitting!\n"));
- close(file_ctx->fd);
+ close(file_ctx->mt_ctx->inotify_fd);
kill(getpid(), SIGTERM);
}
return;
}
- file_ctx->retries = 0;
+ cb->retries = 0;
/* Tell the monitor to signal the children */
- file_ctx->reconf_fn(file_ctx);
+ cb->fn(file_ctx, cb->filename);
+
+ talloc_free(rw_ctx);
file_ctx->needs_update = 0;
}
#endif
@@ -1352,90 +1416,113 @@ static void poll_config_file(struct tevent_context *ev,
int ret, err;
struct stat file_stat;
struct timeval tv;
- struct tevent_timer *timer;
- struct config_file_ctx *file_ctx =
- talloc_get_type(ptr,struct config_file_ctx);
+ struct config_file_ctx *file_ctx;
+ struct config_file_callback *cb;
- ret = stat(file_ctx->filename, &file_stat);
- if (ret < 0) {
- err = errno;
- DEBUG(0, ("Could not stat file [%s]. Error [%d:%s]\n",
- file_ctx->filename, err, strerror(err)));
- /* TODO: If the config file is missing, should we shut down? */
- return;
- }
+ file_ctx = talloc_get_type(ptr,struct config_file_ctx);
- if (file_stat.st_mtime != file_ctx->modified) {
- /* Parse the configuration file and signal the children */
- /* Note: this will fire if the modification time changes into the past
- * as well as the future.
- */
- DEBUG(1, ("Config file changed\n"));
- file_ctx->modified = file_stat.st_mtime;
+ for (cb = file_ctx->callbacks; cb; cb = cb->next) {
+ ret = stat(cb->filename, &file_stat);
+ if (ret < 0) {
+ err = errno;
+ DEBUG(0, ("Could not stat file [%s]. Error [%d:%s]\n",
+ cb->filename, err, strerror(err)));
+ /* TODO: If the config file is missing, should we shut down? */
+ return;
+ }
+
+ if (file_stat.st_mtime != cb->modified) {
+ /* Parse the configuration file and signal the children */
+ /* Note: this will fire if the modification time changes into the past
+ * as well as the future.
+ */
+ DEBUG(1, ("Config file changed\n"));
+ cb->modified = file_stat.st_mtime;
- /* Tell the monitor to signal the children */
- file_ctx->reconf_fn(file_ctx);
+ /* Tell the monitor to signal the children */
+ cb->fn(file_ctx, cb->filename);
+ }
}
gettimeofday(&tv, NULL);
tv.tv_sec += CONFIG_FILE_POLL_INTERVAL;
tv.tv_usec = 0;
- timer = tevent_add_timer(ev, file_ctx->parent_ctx, tv,
+ file_ctx->timer = tevent_add_timer(ev, file_ctx->parent_ctx, tv,
poll_config_file, file_ctx);
- if (!timer) {
+ if (!file_ctx->timer) {
DEBUG(0, ("Error: Config file no longer monitored for changes!"));
}
}
-static int try_inotify(struct config_file_ctx *file_ctx)
+static int try_inotify(struct config_file_ctx *file_ctx, const char *filename,
+ monitor_reconf_fn fn)
{
#ifdef HAVE_SYS_INOTIFY_H
int err, fd_args, ret;
struct tevent_fd *tfd;
+ struct config_file_callback *cb;
+
+ /* Monitoring the file descriptor should be global */
+ if (!file_ctx->mt_ctx->inotify_fd) {
+ /* Set up inotify to monitor the config file for changes */
+ file_ctx->mt_ctx->inotify_fd = inotify_init();
+ if (file_ctx->mt_ctx->inotify_fd < 0) {
+ err = errno;
+ DEBUG(0, ("Could not initialize inotify, error [%d:%s]\n",
+ err, strerror(err)));
+ return err;
+ }
- /* Set up inotify to monitor the config file for changes */
- file_ctx->fd = inotify_init();
- if (file_ctx->fd < 0) {
- err = errno;
- DEBUG(0, ("Could not initialize inotify, error [%d:%s]\n",
- err, strerror(err)));
- return err;
- }
+ fd_args = fcntl(file_ctx->mt_ctx->inotify_fd, F_GETFL, NULL);
+ if (fd_args < 0) {
+ /* Could not set nonblocking */
+ close(file_ctx->mt_ctx->inotify_fd);
+ return EINVAL;
+ }
- fd_args = fcntl(file_ctx->fd, F_GETFL, NULL);
- if (fd_args < 0) {
- /* Could not set nonblocking */
- close(file_ctx->fd);
- return EINVAL;
+ fd_args |= O_NONBLOCK;
+ ret = fcntl(file_ctx->mt_ctx->inotify_fd, F_SETFL, fd_args);
+ if (ret < 0) {
+ /* Could not set nonblocking */
+ close(file_ctx->mt_ctx->inotify_fd);
+ return EINVAL;
+ }
+
+ /* Add the inotify file descriptor to the TEvent context */
+ tfd = tevent_add_fd(file_ctx->mt_ctx->ev, file_ctx,
+ file_ctx->mt_ctx->inotify_fd,
+ TEVENT_FD_READ, config_file_changed,
+ file_ctx);
+ if (!tfd) {
+ close(file_ctx->mt_ctx->inotify_fd);
+ return EIO;
+ }
}
- fd_args |= O_NONBLOCK;
- ret = fcntl(file_ctx->fd, F_SETFL, fd_args);
- if (ret < 0) {
- /* Could not set nonblocking */
- close(file_ctx->fd);
- return EINVAL;
+ cb = talloc_zero(file_ctx, struct config_file_callback);
+ if(!cb) {
+ close(file_ctx->mt_ctx->inotify_fd);
+ return EIO;
}
- file_ctx->wd = inotify_add_watch(file_ctx->fd, file_ctx->filename,
- IN_MODIFY);
- if (file_ctx->wd < 0) {
+ cb->filename = talloc_strdup(cb, filename);
+ if (!cb->filename) {
+ close(file_ctx->mt_ctx->inotify_fd);
+ return ENOMEM;
+ }
+ cb->wd = inotify_add_watch(file_ctx->mt_ctx->inotify_fd,
+ cb->filename, IN_MODIFY);
+ if (cb->wd < 0) {
err = errno;
DEBUG(0, ("Could not add inotify watch for file [%s]. Error [%d:%s]\n",
- file_ctx->filename, err, strerror(err)));
- close(file_ctx->fd);
+ cb->filename, err, strerror(err)));
+ close(file_ctx->mt_ctx->inotify_fd);
return err;
}
+ cb->fn = fn;
+
+ DLIST_ADD(file_ctx->callbacks, cb);
- /* Add the inotify file descriptor to the TEvent context */
- tfd = tevent_add_fd(file_ctx->ev, file_ctx, file_ctx->fd,
- TEVENT_FD_READ, config_file_changed,
- file_ctx);
- if (!tfd) {
- inotify_rm_watch(file_ctx->fd, file_ctx->wd);
- close(file_ctx->fd);
- return EIO;
- }
return EOK;
#else
return EINVAL;
@@ -1443,19 +1530,14 @@ static int try_inotify(struct config_file_ctx *file_ctx)
}
static int monitor_config_file(TALLOC_CTX *mem_ctx,
- struct confdb_ctx *cdb,
- struct tevent_context *ev,
- const char *file,
- confdb_reconf_fn fn,
- void *reconf_pvt)
+ struct mt_ctx *ctx,
+ const char *file,
+ monitor_reconf_fn fn)
{
int ret, err;
struct timeval tv;
-
struct stat file_stat;
- struct config_file_ctx *file_ctx;
-
- struct tevent_timer *timer;
+ struct config_file_callback *cb = NULL;
ret = stat(file, &file_stat);
if (ret < 0) {
@@ -1464,28 +1546,41 @@ static int monitor_config_file(TALLOC_CTX *mem_ctx,
file, err, strerror(err)));
return err;
}
+ if (!ctx->file_ctx) {
+ ctx->file_ctx = talloc_zero(mem_ctx, struct config_file_ctx);
+ if (!ctx->file_ctx) return ENOMEM;
- file_ctx = talloc_zero(mem_ctx, struct config_file_ctx);
- if (!file_ctx) return ENOMEM;
-
- file_ctx->parent_ctx = mem_ctx;
- file_ctx->cdb = cdb;
- file_ctx->filename = talloc_strdup(file_ctx, file);
- file_ctx->modified = file_stat.st_mtime;
- file_ctx->reconf_fn = fn;
- file_ctx->reconf_pvt = reconf_pvt;
- file_ctx->ev = ev;
-
- ret = try_inotify(file_ctx);
+ ctx->file_ctx->parent_ctx = mem_ctx;
+ ctx->file_ctx->mt_ctx = ctx;
+ }
+ ret = try_inotify(ctx->file_ctx, file, fn);
if (ret != EOK) {
/* Could not monitor file with inotify, fall back to polling */
- gettimeofday(&tv, NULL);
- tv.tv_sec += CONFIG_FILE_POLL_INTERVAL;
- tv.tv_usec = 0;
- timer = tevent_add_timer(ev, mem_ctx, tv, poll_config_file, file_ctx);
- if (!timer) {
- talloc_free(file_ctx);
- return EIO;
+ cb = talloc_zero(ctx->file_ctx, struct config_file_callback);
+ if (!cb) {
+ talloc_free(ctx->file_ctx);
+ return ENOMEM;
+ }
+ cb->filename = talloc_strdup(cb, file);
+ if (!cb->filename) {
+ talloc_free(ctx->file_ctx);
+ return ENOMEM;
+ }
+ cb->fn = fn;
+ cb->modified = file_stat.st_mtime;
+
+ DLIST_ADD(ctx->file_ctx->callbacks, cb);
+
+ if(!ctx->file_ctx->timer) {
+ gettimeofday(&tv, NULL);
+ tv.tv_sec += CONFIG_FILE_POLL_INTERVAL;
+ tv.tv_usec = 0;
+ ctx->file_ctx->timer = tevent_add_timer(ctx->ev, mem_ctx, tv,
+ poll_config_file, ctx->file_ctx);
+ if (!ctx->file_ctx->timer) {
+ talloc_free(ctx->file_ctx);
+ return EIO;
+ }
}
}
@@ -1564,7 +1659,15 @@ int monitor_process_init(TALLOC_CTX *mem_ctx,
}
/* Watch for changes to the confdb config file */
- ret = monitor_config_file(ctx, cdb, event_ctx, config_file, monitor_signal_reconf, ctx);
+ ret = monitor_config_file(ctx, ctx, config_file, monitor_signal_reconf);
+ if (ret != EOK) {
+ talloc_free(ctx);
+ return ret;
+ }
+
+ /* Watch for changes to the DNS resolv.conf */
+ ret = monitor_config_file(ctx, ctx, RESOLV_CONF_PATH,
+ monitor_update_resolv);
if (ret != EOK) {
talloc_free(ctx);
return ret;
diff --git a/server/monitor/monitor.h b/server/monitor/monitor.h
index 2a5218b1..0127bbff 100644
--- a/server/monitor/monitor.h
+++ b/server/monitor/monitor.h
@@ -22,8 +22,12 @@
#ifndef _MONITOR_H_
#define _MONITOR_H_
+#define RESOLV_CONF_PATH "/etc/resolv.conf"
#define CONFIG_FILE_POLL_INTERVAL 5 /* seconds */
+typedef int (*monitor_reconf_fn) (struct config_file_ctx *file_ctx,
+ const char *filename);
+
int monitor_process_init(TALLOC_CTX *mem_ctx,
struct tevent_context *event_ctx,
struct confdb_ctx *cdb,
diff --git a/server/monitor/monitor_interfaces.h b/server/monitor/monitor_interfaces.h
index 8fdafd61..05d1bb41 100644
--- a/server/monitor/monitor_interfaces.h
+++ b/server/monitor/monitor_interfaces.h
@@ -39,5 +39,6 @@
#define SERVICE_METHOD_PING "ping"
#define SERVICE_METHOD_RELOAD "reloadConfig"
#define SERVICE_METHOD_SHUTDOWN "shutDown"
+#define SERVICE_METHOD_RES_INIT "resInit"
#define SSSD_SERVICE_PIPE "private/sbus-monitor"
generated by cgit (git 2.34.1) at 2024-11-23 07:21:33 +0000