b25cf61a33
Traditionally, the MTU in "datagram" transport mode was restricted to 2044. That is no longer the case, relax that. In fact, choose a very large maximum and don't differenciate between "connected" mode (they now both use now 65520). This is only the limitation of the connection profile. Whether setting such large MTUs actually works must be determined when activating the profile. Initscripts "ifup-ib" from rdma-core package originally had a limit of 2044. This was raised to 4092 in rh#1186498. It is suggested to raise it further in bug rh#1647541. In general, kernel often does not allow setting large MTUs. And even if it allows it, it may not work because it also requires the entire network to be configured accordingly. But that means, it is generally not helpful to limit the MTU in the connection profile too strictly. Just allow large MTUs, we need to see at activation time whether the configuration works. Note also that all other setting types don't validate the range for MTU at all. Related: https://bugzilla.redhat.com/show_bug.cgi?id=1186498 Related: https://bugzilla.redhat.com/show_bug.cgi?id=1593334 (rdma-core: raise limit from 2044 to 4092 in ifup-ib) Related: https://bugzilla.redhat.com/show_bug.cgi?id=1647541 (rdma-core: raise limit beyond 4092 in ifup-ib) Related: https://bugzilla.redhat.com/show_bug.cgi?id=1532638#c4 (rdma-core: MTU related discussion) Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1534869 (NetworkManager bug about this topic, but with lots of unrelated discussion. See in particular #c16) Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1653494
114 lines
4.4 KiB
C
114 lines
4.4 KiB
C
/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*/
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#ifndef __NM_LIBNM_SHARED_UTILS_H__
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#define __NM_LIBNM_SHARED_UTILS_H__
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/****************************************************************************/
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#include "nm-setting-bridge.h"
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#include "nm-setting-connection.h"
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#include "nm-setting-ip-config.h"
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#include "nm-setting-ip4-config.h"
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#include "nm-setting-ip6-config.h"
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#include "nm-setting-sriov.h"
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#include "nm-setting-team.h"
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#include "nm-setting-vlan.h"
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#include "nm-setting-wireguard.h"
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/****************************************************************************/
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#define nm_auto_unref_ip_address nm_auto (_nm_ip_address_unref)
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NM_AUTO_DEFINE_FCN0 (NMIPAddress *, _nm_ip_address_unref, nm_ip_address_unref)
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#define nm_auto_unref_ip_route nm_auto (_nm_auto_unref_ip_route)
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NM_AUTO_DEFINE_FCN0 (NMIPRoute *, _nm_auto_unref_ip_route, nm_ip_route_unref)
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#define nm_auto_unref_ip_routing_rule nm_auto(_nm_auto_unref_ip_routing_rule)
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NM_AUTO_DEFINE_FCN0 (NMIPRoutingRule *, _nm_auto_unref_ip_routing_rule, nm_ip_routing_rule_unref)
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#define nm_auto_unref_sriov_vf nm_auto (_nm_auto_unref_sriov_vf)
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NM_AUTO_DEFINE_FCN0 (NMSriovVF *, _nm_auto_unref_sriov_vf, nm_sriov_vf_unref)
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#define nm_auto_unref_tc_qdisc nm_auto (_nm_auto_unref_tc_qdisc)
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NM_AUTO_DEFINE_FCN0 (NMTCQdisc *, _nm_auto_unref_tc_qdisc, nm_tc_qdisc_unref)
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#define nm_auto_unref_tc_tfilter nm_auto (_nm_auto_unref_tc_tfilter)
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NM_AUTO_DEFINE_FCN0 (NMTCTfilter *, _nm_auto_unref_tc_tfilter, nm_tc_tfilter_unref)
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#define nm_auto_unref_bridge_vlan nm_auto (_nm_auto_unref_bridge_vlan)
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NM_AUTO_DEFINE_FCN0 (NMBridgeVlan *, _nm_auto_unref_bridge_vlan, nm_bridge_vlan_unref)
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#define nm_auto_unref_team_link_watcher nm_auto (_nm_auto_unref_team_link_watcher)
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NM_AUTO_DEFINE_FCN0 (NMTeamLinkWatcher *, _nm_auto_unref_team_link_watcher, nm_team_link_watcher_unref)
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#define nm_auto_unref_wgpeer nm_auto (_nm_auto_unref_wgpeer)
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NM_AUTO_DEFINE_FCN0 (NMWireGuardPeer *, _nm_auto_unref_wgpeer, nm_wireguard_peer_unref)
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/****************************************************************************/
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static inline guint32
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nm_utils_vlan_priority_map_get_max_prio (NMVlanPriorityMap map, gboolean from)
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{
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if (map == NM_VLAN_INGRESS_MAP) {
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return from
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? 7u /* MAX_8021P_PRIO */
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: (guint32) G_MAXUINT32 /* MAX_SKB_PRIO */;
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}
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nm_assert (map == NM_VLAN_EGRESS_MAP);
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return from
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? (guint32) G_MAXUINT32 /* MAX_SKB_PRIO */
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: 7u /* MAX_8021P_PRIO */;
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}
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gboolean nm_utils_vlan_priority_map_parse_str (NMVlanPriorityMap map_type,
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const char *str,
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gboolean allow_wildcard_to,
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guint32 *out_from,
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guint32 *out_to,
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gboolean *out_has_wildcard_to);
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/*****************************************************************************/
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static inline int
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nm_setting_ip_config_get_addr_family (NMSettingIPConfig *s_ip)
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{
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if (NM_IS_SETTING_IP4_CONFIG (s_ip))
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return AF_INET;
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if (NM_IS_SETTING_IP6_CONFIG (s_ip))
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return AF_INET6;
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g_return_val_if_reached (AF_UNSPEC);
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}
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/*****************************************************************************/
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/* The maximum MTU for infiniband.
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*
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* This is both in transport-mode "datagram" and "connected"
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* and they both have the same maximum define.
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*
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* Note that in the past, MTU in "datagram" mode was restricted
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* to 2044 bytes. That is no longer the case and we accept large
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* MTUs.
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*
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* This define is the maxiumum for the MTU in a connection profile (the
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* setting). Whether large MTUs can be configured later (at activation time)
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* depends on other factors. */
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#define NM_INFINIBAND_MAX_MTU ((guint) 65520)
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#endif /* __NM_LIBNM_SHARED_UTILS_H__ */
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