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https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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eaf36db68b
nm_ppp_manager_stop() wants to ensure that the pppd process is really gone. For that it uses nm_utils_kill_child_async() to first send SIGTERM, and sending SIGKILL after a timeout. Later, we want to fix shutdown of NetworkManager to iterate the mainloop during shutdown, so that such operations are still handled. However, we can only delay shutdown for a certain time. After a timeout (NM_SHUTDOWN_TIMEOUT_MS plus NM_SHUTDOWN_TIMEOUT_MS_GRACE) we really have to give up and terminate. That means, the right amount of time between sending SIGTERM and SIGKILL is exactly NM_SHUTDOWN_TIMEOUT_MS. Hopefully that is of course sufficient in the first place. If not, send SIGKILL afterwards, and give a bit more time (NM_SHUTDOWN_TIMEOUT_MS_GRACE) to reap the child. And if all this time is still not enough, something is really odd and we abort waiting, with a warning in the logfile. Since we don't properly handle shutdown yet, the description above is not really true. But with this patch, we fix it from point of view of NMPPPManager.
89 lines
3.9 KiB
C
89 lines
3.9 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* NetworkManager -- Network link manager
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright 2004 - 2016 Red Hat, Inc.
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* Copyright 2005 - 2008 Novell, Inc.
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*/
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#ifndef __NETWORKMANAGER_UTILS_H__
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#define __NETWORKMANAGER_UTILS_H__
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#include "nm-core-utils.h"
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/*****************************************************************************/
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const char *nm_utils_get_shared_wifi_permission (NMConnection *connection);
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void nm_utils_complete_generic (NMPlatform *platform,
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NMConnection *connection,
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const char *ctype,
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NMConnection *const*existing_connections,
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const char *preferred_id,
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const char *fallback_id_prefix,
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const char *ifname_prefix,
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gboolean default_enable_ipv6);
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typedef gboolean (NMUtilsMatchFilterFunc) (NMConnection *connection, gpointer user_data);
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NMConnection *nm_utils_match_connection (NMConnection *const*connections,
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NMConnection *original,
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gboolean indicated,
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gboolean device_has_carrier,
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gint64 default_v4_metric,
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gint64 default_v6_metric,
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NMUtilsMatchFilterFunc match_filter_func,
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gpointer match_filter_data);
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int nm_match_spec_device_by_pllink (const NMPlatformLink *pllink,
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const char *match_device_type,
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const GSList *specs,
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int no_match_value);
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/*****************************************************************************/
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/* during shutdown, there are two relevant timeouts. One is
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* NM_SHUTDOWN_TIMEOUT_MS which is plenty of time, that we give for all
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* actions to complete. Of course, during shutdown components should hurry
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* to cleanup.
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*
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* When we initiate shutdown, we should start killing child processes
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* with SIGTERM. If they don't complete within NM_SHUTDOWN_TIMEOUT_MS, we send
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* SIGKILL.
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*
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* After NM_SHUTDOWN_TIMEOUT_MS, NetworkManager will however not yet terminate right
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* away. It iterates the mainloop for another NM_SHUTDOWN_TIMEOUT_MS_EXTRA. This
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* should give time to reap the child process (after SIGKILL).
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*
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* So, the maxiumum time we should wait before sending SIGKILL should be at most
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* NM_SHUTDOWN_TIMEOUT_MS.
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*/
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#define NM_SHUTDOWN_TIMEOUT_MS 1500
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#define NM_SHUTDOWN_TIMEOUT_MS_WATCHDOG 500
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typedef struct _NMShutdownWaitObjHandle NMShutdownWaitObjHandle;
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NMShutdownWaitObjHandle *_nm_shutdown_wait_obj_register (GObject *watched_obj,
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const char *msg_reason);
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#define nm_shutdown_wait_obj_register(watched_obj, msg_reason) _nm_shutdown_wait_obj_register((watched_obj), (""msg_reason""))
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void nm_shutdown_wait_obj_unregister (NMShutdownWaitObjHandle *handle);
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/*****************************************************************************/
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#endif /* __NETWORKMANAGER_UTILS_H__ */
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