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[libvirt] [PATCH] Fix test case qemuagenttest compilation.
by Jincheng Miao 02 Aug '13

02 Aug '13

When compiling qemuagenttest, a link error occurs like: ./.libs/libqemumonitortestutils.a(qemumonitortestutils.o): In function `qemuMonitorTestFree': libvirt/tests/qemumonitortestutils.c:346: undefined reference to `qemuMonitorClose' ./.libs/libqemumonitortestutils.a(qemumonitortestutils.o): In function `qemuMonitorTestNew': libvirt/tests/qemumonitortestutils.c:870: undefined reference to `qemuMonitorOpen' collect2: error: ld returned 1 exit status And I checked this error, it caused by the position of libqemumonitortestutils.a in gcc arguments. If libqemumonitortestutils.a before libvirt_driver_qemu_impl.a and libvirt_driver_network_impl.a, the compilation passed. Otherwise, failed. I think this should be a gcc's bug, but nevermind, just fix it in libvirt. --- tests/Makefile.am | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/Makefile.am b/tests/Makefile.am index 9c578fa..b36922e 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -424,7 +424,7 @@ qemuagenttest_SOURCES = \ testutils.c testutils.h \ testutilsqemu.c testutilsqemu.h \ $(NULL) -qemuagenttest_LDADD = $(qemu_LDADDS) libqemumonitortestutils.la +qemuagenttest_LDADD = libqemumonitortestutils.la $(qemu_LDADDS) qemuhotplugtest_SOURCES = \ qemuhotplugtest.c \ -- 1.8.3.1

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[libvirt] libvirt lxc fail to start when --with-dbus=no
by Gao feng 02 Aug '13

02 Aug '13

2013-08-02 02:14:24.044+0000: 22126: error : virDBusGetSystemBus:1194 : internal error: DBus support not compiled into this binary int virSystemdCreateMachine(const char *name, const char *drivername, bool privileged, const unsigned char *uuid, const char *rootdir, pid_t pidleader, bool iscontainer, const char *partition) { int ret = -1; DBusConnection *conn; char *machinename = NULL; char *creatorname = NULL; char *username = NULL; char *slicename = NULL; if (!(conn = virDBusGetSystemBus())) return -1; Thanks!

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[libvirt] ANNOUNCE: libvirt 0.10.2.7 maintenance release
by Cole Robinson 02 Aug '13

02 Aug '13

libvirt 0.10.2.7 maintenance release is now available. This is libvirt 0.10.2 with additional bugfixes that have accumulated upstream since the initial release. This release can be downloaded at: http://libvirt.org/sources/stable_updates/libvirt-0.10.2.7.tar.gz Changes in this version: * udev: fix crash in libudev logging * security: fix deadlock with prefork * security_dac: compute supplemental groups before fork * security: framework for driver PreFork handler * Fix potential deadlock across fork() in QEMU driver * util: make virSetUIDGID async-signal-safe * util: add virGetGroupList * util: improve user lookup helper * storage: return -1 when fs pool can't be mounted * Fix invalid read in virCgroupGetValueStr * virsh: edit: don't leak XML string on reedit or redefine For info about past maintenance releases, see: http://wiki.libvirt.org/page/Maintenance_Releases Thanks, Cole

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[libvirt] ANNOUNCE: libvirt 1.0.5.5 maintenance release
by Cole Robinson 02 Aug '13

02 Aug '13

libvirt 1.0.5.5 maintenance release is now available. This is libvirt 1.0.5 with additional bugfixes that have accumulated upstream since the initial release. This release can be downloaded at: http://libvirt.org/sources/stable_updates/libvirt-1.0.5.5.tar.gz Changes in this version: * Set the number of elements 0 in virNetwork*Clear * Don't check validity of missing attributes in DNS SRV XML * cgroup: reuse buffer for getline * rbd: Do not free the secret if it is not set * caps: use -device for primary video when qemu >=1.6 * examples: fix mingw build vs. printf * build: fix virutil build on mingw * build: work around mingw header pollution * build: configure must not affect tarball contents * build: avoid build failure without gnutls * Fix build with clang * maint: update to latest gnulib * maint: update to latest gnulib * build: honor autogen.sh --no-git * maint: update to latest gnulib * FreeBSD: disable buggy -fstack-protector-all * build: update to latest gnulib, for syntax-check * maint: update to latest gnulib * lxc: correctly backport /dev/tty fix * security: fix deadlock with prefork * security_dac: compute supplemental groups before fork * security: framework for driver PreFork handler * util: make virSetUIDGID async-signal-safe * util: add virGetGroupList * util: improve user lookup helper For info about past maintenance releases, see: http://wiki.libvirt.org/page/Maintenance_Releases Thanks, Cole

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[libvirt] [PATCH v2] bridge driver: extract platform specifics
by Roman Bogorodskiy 02 Aug '13

02 Aug '13

* Move platform specific things (e.g. firewalling and route collision checks) into bridge_driver_platform * Create two platform specific implementations: - bridge_driver_linux: Linux implementation using iptables, it's actually the code moved from bridge_driver.c - bridge_driver_nop: dumb implementation that does nothing --- src/network/bridge_driver_platform.h | 79 ++++ src/network/bridge_driver.c | 708 +-------------------------------- src/network/bridge_driver_linux.c | 709 ++++++++++++++++++++++++++++++++++ src/network/bridge_driver_nop.c | 78 ++++ src/network/bridge_driver_platform.c | 32 ++ po/POTFILES.in | 1 + src/Makefile.am | 5 +- 7 files changed, 903 insertions(+), 709 deletions(-) create mode 100644 src/network/bridge_driver_platform.h create mode 100644 src/network/bridge_driver_linux.c create mode 100644 src/network/bridge_driver_nop.c create mode 100644 src/network/bridge_driver_platform.c diff --git a/src/network/bridge_driver_platform.h b/src/network/bridge_driver_platform.h new file mode 100644 index 0000000..289ab79 --- /dev/null +++ b/src/network/bridge_driver_platform.h @@ -0,0 +1,79 @@ +/* + * bridge_driver.h: platform specific routines for bridge driver + * + * Copyright (C) 2006-2013 Red Hat, Inc. + * Copyright (C) 2006 Daniel P. Berrange + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + * + * Author: Daniel P. Berrange <berrange(a)redhat.com> + */ + +#ifndef __VIR_BRIDGE_DRIVER_PLATFORM_H__ +# define __VIR_BRIDGE_DRIVER_PLATFORM_H__ + +# include "internal.h" +# include "virlog.h" +# include "virthread.h" +# include "virdnsmasq.h" +# include "network_conf.h" + +/* Main driver state */ +struct _virNetworkDriverState { + virMutex lock; + + virNetworkObjList networks; + + char *networkConfigDir; + char *networkAutostartDir; + char *stateDir; + char *pidDir; + char *dnsmasqStateDir; + char *radvdStateDir; + dnsmasqCapsPtr dnsmasqCaps; +}; + +typedef struct _virNetworkDriverState virNetworkDriverState; +typedef virNetworkDriverState *virNetworkDriverStatePtr; + +int networkCheckRouteCollision(virNetworkObjPtr network); + +int networkAddMasqueradingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef); + +void networkRemoveMasqueradingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef); + +int networkAddRoutingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef); + +void networkRemoveRoutingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef); + +int networkAddGeneralFirewallRules(virNetworkObjPtr network); + +void networkRemoveGeneralFirewallRules(virNetworkObjPtr network); + +int networkAddIpSpecificFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef); + +void networkRemoveIpSpecificFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef); + +int networkAddFirewallRules(virNetworkObjPtr network); + +void networkRemoveFirewallRules(virNetworkObjPtr network); + +#endif /* __VIR_BRIDGE_DRIVER_PLATFORM_H__ */ diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index 0bb57ea..a1b0dd5 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -45,6 +45,7 @@ #include "virerror.h" #include "datatypes.h" #include "bridge_driver.h" +#include "bridge_driver_platform.h" #include "network_conf.h" #include "device_conf.h" #include "driver.h" @@ -69,24 +70,6 @@ #define VIR_FROM_THIS VIR_FROM_NETWORK -/* Main driver state */ -struct _virNetworkDriverState { - virMutex lock; - - virNetworkObjList networks; - - char *networkConfigDir; - char *networkAutostartDir; - char *stateDir; - char *pidDir; - char *dnsmasqStateDir; - char *radvdStateDir; - dnsmasqCapsPtr dnsmasqCaps; -}; - -typedef struct _virNetworkDriverState virNetworkDriverState; -typedef virNetworkDriverState *virNetworkDriverStatePtr; - static void networkDriverLock(virNetworkDriverStatePtr driver) { virMutexLock(&driver->lock); @@ -1507,597 +1490,6 @@ networkRefreshDaemons(virNetworkDriverStatePtr driver) } } -static int -networkAddMasqueradingFirewallRules(virNetworkObjPtr network, - virNetworkIpDefPtr ipdef) -{ - int prefix = virNetworkIpDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(network->def, 0); - - if (prefix < 0) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("Invalid prefix or netmask for '%s'"), - network->def->bridge); - goto masqerr1; - } - - /* allow forwarding packets from the bridge interface */ - if (iptablesAddForwardAllowOut(&ipdef->address, - prefix, - network->def->bridge, - forwardIf) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow forwarding from '%s'"), - network->def->bridge); - goto masqerr1; - } - - /* allow forwarding packets to the bridge interface if they are - * part of an existing connection - */ - if (iptablesAddForwardAllowRelatedIn(&ipdef->address, - prefix, - network->def->bridge, - forwardIf) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow forwarding to '%s'"), - network->def->bridge); - goto masqerr2; - } - - /* - * Enable masquerading. - * - * We need to end up with 3 rules in the table in this order - * - * 1. protocol=tcp with sport mapping restriction - * 2. protocol=udp with sport mapping restriction - * 3. generic any protocol - * - * The sport mappings are required, because default IPtables - * MASQUERADE maintain port numbers unchanged where possible. - * - * NFS can be configured to only "trust" port numbers < 1023. - * - * Guests using NAT thus need to be prevented from having port - * numbers < 1023, otherwise they can bypass the NFS "security" - * check on the source port number. - * - * Since we use '--insert' to add rules to the header of the - * chain, we actually need to add them in the reverse of the - * order just mentioned ! - */ - - /* First the generic masquerade rule for other protocols */ - if (iptablesAddForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - NULL) < 0) { - if (forwardIf) - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to enable masquerading to %s"), - forwardIf); - else - virReportError(VIR_ERR_SYSTEM_ERROR, "%s", - _("failed to add iptables rule to enable masquerading")); - goto masqerr3; - } - - /* UDP with a source port restriction */ - if (iptablesAddForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - "udp") < 0) { - if (forwardIf) - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to enable UDP masquerading to %s"), - forwardIf); - else - virReportError(VIR_ERR_SYSTEM_ERROR, "%s", - _("failed to add iptables rule to enable UDP masquerading")); - goto masqerr4; - } - - /* TCP with a source port restriction */ - if (iptablesAddForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - "tcp") < 0) { - if (forwardIf) - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to enable TCP masquerading to %s"), - forwardIf); - else - virReportError(VIR_ERR_SYSTEM_ERROR, "%s", - _("failed to add iptables rule to enable TCP masquerading")); - goto masqerr5; - } - - return 0; - - masqerr5: - iptablesRemoveForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - "udp"); - masqerr4: - iptablesRemoveForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - NULL); - masqerr3: - iptablesRemoveForwardAllowRelatedIn(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); - masqerr2: - iptablesRemoveForwardAllowOut(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); - masqerr1: - return -1; -} - -static void -networkRemoveMasqueradingFirewallRules(virNetworkObjPtr network, - virNetworkIpDefPtr ipdef) -{ - int prefix = virNetworkIpDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(network->def, 0); - - if (prefix >= 0) { - iptablesRemoveForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - "tcp"); - iptablesRemoveForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - "udp"); - iptablesRemoveForwardMasquerade(&ipdef->address, - prefix, - forwardIf, - &network->def->forward.addr, - &network->def->forward.port, - NULL); - - iptablesRemoveForwardAllowRelatedIn(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); - iptablesRemoveForwardAllowOut(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); - } -} - -static int -networkAddRoutingFirewallRules(virNetworkObjPtr network, - virNetworkIpDefPtr ipdef) -{ - int prefix = virNetworkIpDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(network->def, 0); - - if (prefix < 0) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("Invalid prefix or netmask for '%s'"), - network->def->bridge); - goto routeerr1; - } - - /* allow routing packets from the bridge interface */ - if (iptablesAddForwardAllowOut(&ipdef->address, - prefix, - network->def->bridge, - forwardIf) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow routing from '%s'"), - network->def->bridge); - goto routeerr1; - } - - /* allow routing packets to the bridge interface */ - if (iptablesAddForwardAllowIn(&ipdef->address, - prefix, - network->def->bridge, - forwardIf) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow routing to '%s'"), - network->def->bridge); - goto routeerr2; - } - - return 0; - -routeerr2: - iptablesRemoveForwardAllowOut(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); -routeerr1: - return -1; -} - -static void -networkRemoveRoutingFirewallRules(virNetworkObjPtr network, - virNetworkIpDefPtr ipdef) -{ - int prefix = virNetworkIpDefPrefix(ipdef); - const char *forwardIf = virNetworkDefForwardIf(network->def, 0); - - if (prefix >= 0) { - iptablesRemoveForwardAllowIn(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); - - iptablesRemoveForwardAllowOut(&ipdef->address, - prefix, - network->def->bridge, - forwardIf); - } -} - -/* Add all once/network rules required for IPv6. - * If no IPv6 addresses are defined and <network ipv6='yes'> is - * specified, then allow IPv6 commuinications between virtual systems. - * If any IPv6 addresses are defined, then add the rules for regular operation. - */ -static int -networkAddGeneralIp6tablesRules(virNetworkObjPtr network) -{ - - if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0) && - !network->def->ipv6nogw) { - return 0; - } - - /* Catch all rules to block forwarding to/from bridges */ - - if (iptablesAddForwardRejectOut(AF_INET6, network->def->bridge) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add ip6tables rule to block outbound traffic from '%s'"), - network->def->bridge); - goto err1; - } - - if (iptablesAddForwardRejectIn(AF_INET6, network->def->bridge) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add ip6tables rule to block inbound traffic to '%s'"), - network->def->bridge); - goto err2; - } - - /* Allow traffic between guests on the same bridge */ - if (iptablesAddForwardAllowCross(AF_INET6, network->def->bridge) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add ip6tables rule to allow cross bridge traffic on '%s'"), - network->def->bridge); - goto err3; - } - - /* if no IPv6 addresses are defined, we are done. */ - if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0)) - return 0; - - /* allow DNS over IPv6 */ - if (iptablesAddTcpInput(AF_INET6, network->def->bridge, 53) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add ip6tables rule to allow DNS requests from '%s'"), - network->def->bridge); - goto err4; - } - - if (iptablesAddUdpInput(AF_INET6, network->def->bridge, 53) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add ip6tables rule to allow DNS requests from '%s'"), - network->def->bridge); - goto err5; - } - - if (iptablesAddUdpInput(AF_INET6, network->def->bridge, 547) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add ip6tables rule to allow DHCP6 requests from '%s'"), - network->def->bridge); - goto err6; - } - - return 0; - - /* unwind in reverse order from the point of failure */ -err6: - iptablesRemoveUdpInput(AF_INET6, network->def->bridge, 53); -err5: - iptablesRemoveTcpInput(AF_INET6, network->def->bridge, 53); -err4: - iptablesRemoveForwardAllowCross(AF_INET6, network->def->bridge); -err3: - iptablesRemoveForwardRejectIn(AF_INET6, network->def->bridge); -err2: - iptablesRemoveForwardRejectOut(AF_INET6, network->def->bridge); -err1: - return -1; -} - -static void -networkRemoveGeneralIp6tablesRules(virNetworkObjPtr network) -{ - if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0) && - !network->def->ipv6nogw) { - return; - } - if (virNetworkDefGetIpByIndex(network->def, AF_INET6, 0)) { - iptablesRemoveUdpInput(AF_INET6, network->def->bridge, 547); - iptablesRemoveUdpInput(AF_INET6, network->def->bridge, 53); - iptablesRemoveTcpInput(AF_INET6, network->def->bridge, 53); - } - - /* the following rules are there if no IPv6 address has been defined - * but network->def->ipv6nogw == true - */ - iptablesRemoveForwardAllowCross(AF_INET6, network->def->bridge); - iptablesRemoveForwardRejectIn(AF_INET6, network->def->bridge); - iptablesRemoveForwardRejectOut(AF_INET6, network->def->bridge); -} - -static int -networkAddGeneralFirewallRules(virNetworkObjPtr network) -{ - size_t i; - virNetworkIpDefPtr ipv4def; - - /* First look for first IPv4 address that has dhcp or tftpboot defined. */ - /* We support dhcp config on 1 IPv4 interface only. */ - for (i = 0; - (ipv4def = virNetworkDefGetIpByIndex(network->def, AF_INET, i)); - i++) { - if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) - break; - } - - /* allow DHCP requests through to dnsmasq */ - - if (iptablesAddTcpInput(AF_INET, network->def->bridge, 67) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow DHCP requests from '%s'"), - network->def->bridge); - goto err1; - } - - if (iptablesAddUdpInput(AF_INET, network->def->bridge, 67) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow DHCP requests from '%s'"), - network->def->bridge); - goto err2; - } - - /* If we are doing local DHCP service on this network, attempt to - * add a rule that will fixup the checksum of DHCP response - * packets back to the guests (but report failure without - * aborting, since not all iptables implementations support it). - */ - - if (ipv4def && (ipv4def->nranges || ipv4def->nhosts) && - (iptablesAddOutputFixUdpChecksum(network->def->bridge, 68) < 0)) { - VIR_WARN("Could not add rule to fixup DHCP response checksums " - "on network '%s'.", network->def->name); - VIR_WARN("May need to update iptables package & kernel to support CHECKSUM rule."); - } - - /* allow DNS requests through to dnsmasq */ - if (iptablesAddTcpInput(AF_INET, network->def->bridge, 53) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow DNS requests from '%s'"), - network->def->bridge); - goto err3; - } - - if (iptablesAddUdpInput(AF_INET, network->def->bridge, 53) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow DNS requests from '%s'"), - network->def->bridge); - goto err4; - } - - /* allow TFTP requests through to dnsmasq if necessary */ - if (ipv4def && ipv4def->tftproot && - iptablesAddUdpInput(AF_INET, network->def->bridge, 69) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow TFTP requests from '%s'"), - network->def->bridge); - goto err5; - } - - /* Catch all rules to block forwarding to/from bridges */ - - if (iptablesAddForwardRejectOut(AF_INET, network->def->bridge) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to block outbound traffic from '%s'"), - network->def->bridge); - goto err6; - } - - if (iptablesAddForwardRejectIn(AF_INET, network->def->bridge) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to block inbound traffic to '%s'"), - network->def->bridge); - goto err7; - } - - /* Allow traffic between guests on the same bridge */ - if (iptablesAddForwardAllowCross(AF_INET, network->def->bridge) < 0) { - virReportError(VIR_ERR_SYSTEM_ERROR, - _("failed to add iptables rule to allow cross bridge traffic on '%s'"), - network->def->bridge); - goto err8; - } - - /* add IPv6 general rules, if needed */ - if (networkAddGeneralIp6tablesRules(network) < 0) { - goto err9; - } - - return 0; - - /* unwind in reverse order from the point of failure */ -err9: - iptablesRemoveForwardAllowCross(AF_INET, network->def->bridge); -err8: - iptablesRemoveForwardRejectIn(AF_INET, network->def->bridge); -err7: - iptablesRemoveForwardRejectOut(AF_INET, network->def->bridge); -err6: - if (ipv4def && ipv4def->tftproot) { - iptablesRemoveUdpInput(AF_INET, network->def->bridge, 69); - } -err5: - iptablesRemoveUdpInput(AF_INET, network->def->bridge, 53); -err4: - iptablesRemoveTcpInput(AF_INET, network->def->bridge, 53); -err3: - iptablesRemoveUdpInput(AF_INET, network->def->bridge, 67); -err2: - iptablesRemoveTcpInput(AF_INET, network->def->bridge, 67); -err1: - return -1; -} - -static void -networkRemoveGeneralFirewallRules(virNetworkObjPtr network) -{ - size_t i; - virNetworkIpDefPtr ipv4def; - - networkRemoveGeneralIp6tablesRules(network); - - for (i = 0; - (ipv4def = virNetworkDefGetIpByIndex(network->def, AF_INET, i)); - i++) { - if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) - break; - } - - iptablesRemoveForwardAllowCross(AF_INET, network->def->bridge); - iptablesRemoveForwardRejectIn(AF_INET, network->def->bridge); - iptablesRemoveForwardRejectOut(AF_INET, network->def->bridge); - if (ipv4def && ipv4def->tftproot) { - iptablesRemoveUdpInput(AF_INET, network->def->bridge, 69); - } - iptablesRemoveUdpInput(AF_INET, network->def->bridge, 53); - iptablesRemoveTcpInput(AF_INET, network->def->bridge, 53); - if (ipv4def && (ipv4def->nranges || ipv4def->nhosts)) { - iptablesRemoveOutputFixUdpChecksum(network->def->bridge, 68); - } - iptablesRemoveUdpInput(AF_INET, network->def->bridge, 67); - iptablesRemoveTcpInput(AF_INET, network->def->bridge, 67); -} - -static int -networkAddIpSpecificFirewallRules(virNetworkObjPtr network, - virNetworkIpDefPtr ipdef) -{ - /* NB: in the case of IPv6, routing rules are added when the - * forward mode is NAT. This is because IPv6 has no NAT. - */ - - if (network->def->forward.type == VIR_NETWORK_FORWARD_NAT) { - if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) - return networkAddMasqueradingFirewallRules(network, ipdef); - else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) - return networkAddRoutingFirewallRules(network, ipdef); - } else if (network->def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { - return networkAddRoutingFirewallRules(network, ipdef); - } - return 0; -} - -static void -networkRemoveIpSpecificFirewallRules(virNetworkObjPtr network, - virNetworkIpDefPtr ipdef) -{ - if (network->def->forward.type == VIR_NETWORK_FORWARD_NAT) { - if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) - networkRemoveMasqueradingFirewallRules(network, ipdef); - else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) - networkRemoveRoutingFirewallRules(network, ipdef); - } else if (network->def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { - networkRemoveRoutingFirewallRules(network, ipdef); - } -} - -/* Add all rules for all ip addresses (and general rules) on a network */ -static int -networkAddFirewallRules(virNetworkObjPtr network) -{ - size_t i, j; - virNetworkIpDefPtr ipdef; - virErrorPtr orig_error; - - /* Add "once per network" rules */ - if (networkAddGeneralFirewallRules(network) < 0) - return -1; - - for (i = 0; - (ipdef = virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, i)); - i++) { - /* Add address-specific iptables rules */ - if (networkAddIpSpecificFirewallRules(network, ipdef) < 0) { - goto err; - } - } - return 0; - -err: - /* store the previous error message before attempting removal of rules */ - orig_error = virSaveLastError(); - - /* The final failed call to networkAddIpSpecificFirewallRules will - * have removed any rules it created, but we need to remove those - * added for previous IP addresses. - */ - for (j = 0; j < i; j++) { - if ((ipdef = virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, j))) - networkRemoveIpSpecificFirewallRules(network, ipdef); - } - networkRemoveGeneralFirewallRules(network); - - /* return the original error */ - virSetError(orig_error); - virFreeError(orig_error); - return -1; -} - -/* Remove all rules for all ip addresses (and general rules) on a network */ -static void -networkRemoveFirewallRules(virNetworkObjPtr network) -{ - size_t i; - virNetworkIpDefPtr ipdef; - - for (i = 0; - (ipdef = virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, i)); - i++) { - networkRemoveIpSpecificFirewallRules(network, ipdef); - } - networkRemoveGeneralFirewallRules(network); -} - static void networkReloadFirewallRules(virNetworkDriverStatePtr driver) { @@ -2206,104 +1598,6 @@ cleanup: return ret; } -#define PROC_NET_ROUTE "/proc/net/route" - -/* XXX: This function can be a lot more exhaustive, there are certainly - * other scenarios where we can ruin host network connectivity. - * XXX: Using a proper library is preferred over parsing /proc - */ -static int -networkCheckRouteCollision(virNetworkObjPtr network) -{ - int ret = 0, len; - char *cur, *buf = NULL; - /* allow for up to 100000 routes (each line is 128 bytes) */ - enum {MAX_ROUTE_SIZE = 128*100000}; - - /* Read whole routing table into memory */ - if ((len = virFileReadAll(PROC_NET_ROUTE, MAX_ROUTE_SIZE, &buf)) < 0) - goto out; - - /* Dropping the last character shouldn't hurt */ - if (len > 0) - buf[len-1] = '\0'; - - VIR_DEBUG("%s output:\n%s", PROC_NET_ROUTE, buf); - - if (!STRPREFIX(buf, "Iface")) - goto out; - - /* First line is just headings, skip it */ - cur = strchr(buf, '\n'); - if (cur) - cur++; - - while (cur) { - char iface[17], dest[128], mask[128]; - unsigned int addr_val, mask_val; - virNetworkIpDefPtr ipdef; - int num; - size_t i; - - /* NUL-terminate the line, so sscanf doesn't go beyond a newline. */ - char *nl = strchr(cur, '\n'); - if (nl) { - *nl++ = '\0'; - } - - num = sscanf(cur, "%16s %127s %*s %*s %*s %*s %*s %127s", - iface, dest, mask); - cur = nl; - - if (num != 3) { - VIR_DEBUG("Failed to parse %s", PROC_NET_ROUTE); - continue; - } - - if (virStrToLong_ui(dest, NULL, 16, &addr_val) < 0) { - VIR_DEBUG("Failed to convert network address %s to uint", dest); - continue; - } - - if (virStrToLong_ui(mask, NULL, 16, &mask_val) < 0) { - VIR_DEBUG("Failed to convert network mask %s to uint", mask); - continue; - } - - addr_val &= mask_val; - - for (i = 0; - (ipdef = virNetworkDefGetIpByIndex(network->def, AF_INET, i)); - i++) { - - unsigned int net_dest; - virSocketAddr netmask; - - if (virNetworkIpDefNetmask(ipdef, &netmask) < 0) { - VIR_WARN("Failed to get netmask of '%s'", - network->def->bridge); - continue; - } - - net_dest = (ipdef->address.data.inet4.sin_addr.s_addr & - netmask.data.inet4.sin_addr.s_addr); - - if ((net_dest == addr_val) && - (netmask.data.inet4.sin_addr.s_addr == mask_val)) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("Network is already in use by interface %s"), - iface); - ret = -1; - goto out; - } - } - } - -out: - VIR_FREE(buf); - return ret; -} - /* add an IP address to a bridge */ static int networkAddAddrToBridge(virNetworkObjPtr network, diff --git a/src/network/bridge_driver_linux.c b/src/network/bridge_driver_linux.c new file mode 100644 index 0000000..80430a8 --- /dev/null +++ b/src/network/bridge_driver_linux.c @@ -0,0 +1,709 @@ +/* + * bridge_driver_linux.c: Linux implementation of bridge driver + * + * Copyright (C) 2006-2013 Red Hat, Inc. + * Copyright (C) 2006 Daniel P. Berrange + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + * + * Author: Daniel P. Berrange <berrange(a)redhat.com> + */ + +#include <config.h> + +#include "viralloc.h" +#include "virfile.h" +#include "viriptables.h" +#include "virstring.h" + +#define VIR_FROM_THIS VIR_FROM_NONE + +#define PROC_NET_ROUTE "/proc/net/route" + +/* XXX: This function can be a lot more exhaustive, there are certainly + * other scenarios where we can ruin host network connectivity. + * XXX: Using a proper library is preferred over parsing /proc + */ +int networkCheckRouteCollision(virNetworkObjPtr network) +{ + int ret = 0, len; + char *cur, *buf = NULL; + /* allow for up to 100000 routes (each line is 128 bytes) */ + enum {MAX_ROUTE_SIZE = 128*100000}; + + /* Read whole routing table into memory */ + if ((len = virFileReadAll(PROC_NET_ROUTE, MAX_ROUTE_SIZE, &buf)) < 0) + goto out; + + /* Dropping the last character shouldn't hurt */ + if (len > 0) + buf[len-1] = '\0'; + + VIR_DEBUG("%s output:\n%s", PROC_NET_ROUTE, buf); + + if (!STRPREFIX(buf, "Iface")) + goto out; + + /* First line is just headings, skip it */ + cur = strchr(buf, '\n'); + if (cur) + cur++; + + while (cur) { + char iface[17], dest[128], mask[128]; + unsigned int addr_val, mask_val; + virNetworkIpDefPtr ipdef; + int num; + size_t i; + + /* NUL-terminate the line, so sscanf doesn't go beyond a newline. */ + char *nl = strchr(cur, '\n'); + if (nl) { + *nl++ = '\0'; + } + + num = sscanf(cur, "%16s %127s %*s %*s %*s %*s %*s %127s", + iface, dest, mask); + cur = nl; + + if (num != 3) { + VIR_DEBUG("Failed to parse %s", PROC_NET_ROUTE); + continue; + } + + if (virStrToLong_ui(dest, NULL, 16, &addr_val) < 0) { + VIR_DEBUG("Failed to convert network address %s to uint", dest); + continue; + } + + if (virStrToLong_ui(mask, NULL, 16, &mask_val) < 0) { + VIR_DEBUG("Failed to convert network mask %s to uint", mask); + continue; + } + + addr_val &= mask_val; + + for (i = 0; + (ipdef = virNetworkDefGetIpByIndex(network->def, AF_INET, i)); + i++) { + + unsigned int net_dest; + virSocketAddr netmask; + + if (virNetworkIpDefNetmask(ipdef, &netmask) < 0) { + VIR_WARN("Failed to get netmask of '%s'", + network->def->bridge); + continue; + } + + net_dest = (ipdef->address.data.inet4.sin_addr.s_addr & + netmask.data.inet4.sin_addr.s_addr); + + if ((net_dest == addr_val) && + (netmask.data.inet4.sin_addr.s_addr == mask_val)) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Network is already in use by interface %s"), + iface); + ret = -1; + goto out; + } + } + } + +out: + VIR_FREE(buf); + return ret; +} + +int networkAddMasqueradingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef) +{ + int prefix = virNetworkIpDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(network->def, 0); + + if (prefix < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid prefix or netmask for '%s'"), + network->def->bridge); + goto masqerr1; + } + + /* allow forwarding packets from the bridge interface */ + if (iptablesAddForwardAllowOut(&ipdef->address, + prefix, + network->def->bridge, + forwardIf) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow forwarding from '%s'"), + network->def->bridge); + goto masqerr1; + } + + /* allow forwarding packets to the bridge interface if they are + * part of an existing connection + */ + if (iptablesAddForwardAllowRelatedIn(&ipdef->address, + prefix, + network->def->bridge, + forwardIf) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow forwarding to '%s'"), + network->def->bridge); + goto masqerr2; + } + + /* + * Enable masquerading. + * + * We need to end up with 3 rules in the table in this order + * + * 1. protocol=tcp with sport mapping restriction + * 2. protocol=udp with sport mapping restriction + * 3. generic any protocol + * + * The sport mappings are required, because default IPtables + * MASQUERADE maintain port numbers unchanged where possible. + * + * NFS can be configured to only "trust" port numbers < 1023. + * + * Guests using NAT thus need to be prevented from having port + * numbers < 1023, otherwise they can bypass the NFS "security" + * check on the source port number. + * + * Since we use '--insert' to add rules to the header of the + * chain, we actually need to add them in the reverse of the + * order just mentioned ! + */ + + /* First the generic masquerade rule for other protocols */ + if (iptablesAddForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + NULL) < 0) { + if (forwardIf) + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to enable masquerading to %s"), + forwardIf); + else + virReportError(VIR_ERR_SYSTEM_ERROR, "%s", + _("failed to add iptables rule to enable masquerading")); + goto masqerr3; + } + + /* UDP with a source port restriction */ + if (iptablesAddForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + "udp") < 0) { + if (forwardIf) + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to enable UDP masquerading to %s"), + forwardIf); + else + virReportError(VIR_ERR_SYSTEM_ERROR, "%s", + _("failed to add iptables rule to enable UDP masquerading")); + goto masqerr4; + } + + /* TCP with a source port restriction */ + if (iptablesAddForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + "tcp") < 0) { + if (forwardIf) + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to enable TCP masquerading to %s"), + forwardIf); + else + virReportError(VIR_ERR_SYSTEM_ERROR, "%s", + _("failed to add iptables rule to enable TCP masquerading")); + goto masqerr5; + } + + return 0; + + masqerr5: + iptablesRemoveForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + "udp"); + masqerr4: + iptablesRemoveForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + NULL); + masqerr3: + iptablesRemoveForwardAllowRelatedIn(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); + masqerr2: + iptablesRemoveForwardAllowOut(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); + masqerr1: + return -1; +} + +void networkRemoveMasqueradingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef) +{ + int prefix = virNetworkIpDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(network->def, 0); + + if (prefix >= 0) { + iptablesRemoveForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + "tcp"); + iptablesRemoveForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + "udp"); + iptablesRemoveForwardMasquerade(&ipdef->address, + prefix, + forwardIf, + &network->def->forward.addr, + &network->def->forward.port, + NULL); + + iptablesRemoveForwardAllowRelatedIn(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); + iptablesRemoveForwardAllowOut(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); + } +} + +int networkAddRoutingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef) +{ + int prefix = virNetworkIpDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(network->def, 0); + + if (prefix < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Invalid prefix or netmask for '%s'"), + network->def->bridge); + goto routeerr1; + } + + /* allow routing packets from the bridge interface */ + if (iptablesAddForwardAllowOut(&ipdef->address, + prefix, + network->def->bridge, + forwardIf) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow routing from '%s'"), + network->def->bridge); + goto routeerr1; + } + + /* allow routing packets to the bridge interface */ + if (iptablesAddForwardAllowIn(&ipdef->address, + prefix, + network->def->bridge, + forwardIf) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow routing to '%s'"), + network->def->bridge); + goto routeerr2; + } + + return 0; + +routeerr2: + iptablesRemoveForwardAllowOut(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); +routeerr1: + return -1; +} + +void networkRemoveRoutingFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef) +{ + int prefix = virNetworkIpDefPrefix(ipdef); + const char *forwardIf = virNetworkDefForwardIf(network->def, 0); + + if (prefix >= 0) { + iptablesRemoveForwardAllowIn(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); + + iptablesRemoveForwardAllowOut(&ipdef->address, + prefix, + network->def->bridge, + forwardIf); + } +} + +/* Add all once/network rules required for IPv6. + * If no IPv6 addresses are defined and <network ipv6='yes'> is + * specified, then allow IPv6 commuinications between virtual systems. + * If any IPv6 addresses are defined, then add the rules for regular operation. + */ +static int +networkAddGeneralIp6tablesRules(virNetworkObjPtr network) +{ + + if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0) && + !network->def->ipv6nogw) { + return 0; + } + + /* Catch all rules to block forwarding to/from bridges */ + + if (iptablesAddForwardRejectOut(AF_INET6, network->def->bridge) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add ip6tables rule to block outbound traffic from '%s'"), + network->def->bridge); + goto err1; + } + + if (iptablesAddForwardRejectIn(AF_INET6, network->def->bridge) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add ip6tables rule to block inbound traffic to '%s'"), + network->def->bridge); + goto err2; + } + + /* Allow traffic between guests on the same bridge */ + if (iptablesAddForwardAllowCross(AF_INET6, network->def->bridge) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add ip6tables rule to allow cross bridge traffic on '%s'"), + network->def->bridge); + goto err3; + } + + /* if no IPv6 addresses are defined, we are done. */ + if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0)) + return 0; + + /* allow DNS over IPv6 */ + if (iptablesAddTcpInput(AF_INET6, network->def->bridge, 53) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add ip6tables rule to allow DNS requests from '%s'"), + network->def->bridge); + goto err4; + } + + if (iptablesAddUdpInput(AF_INET6, network->def->bridge, 53) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add ip6tables rule to allow DNS requests from '%s'"), + network->def->bridge); + goto err5; + } + + if (iptablesAddUdpInput(AF_INET6, network->def->bridge, 547) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add ip6tables rule to allow DHCP6 requests from '%s'"), + network->def->bridge); + goto err6; + } + + return 0; + + /* unwind in reverse order from the point of failure */ +err6: + iptablesRemoveUdpInput(AF_INET6, network->def->bridge, 53); +err5: + iptablesRemoveTcpInput(AF_INET6, network->def->bridge, 53); +err4: + iptablesRemoveForwardAllowCross(AF_INET6, network->def->bridge); +err3: + iptablesRemoveForwardRejectIn(AF_INET6, network->def->bridge); +err2: + iptablesRemoveForwardRejectOut(AF_INET6, network->def->bridge); +err1: + return -1; +} + +static void +networkRemoveGeneralIp6tablesRules(virNetworkObjPtr network) +{ + if (!virNetworkDefGetIpByIndex(network->def, AF_INET6, 0) && + !network->def->ipv6nogw) { + return; + } + if (virNetworkDefGetIpByIndex(network->def, AF_INET6, 0)) { + iptablesRemoveUdpInput(AF_INET6, network->def->bridge, 547); + iptablesRemoveUdpInput(AF_INET6, network->def->bridge, 53); + iptablesRemoveTcpInput(AF_INET6, network->def->bridge, 53); + } + + /* the following rules are there if no IPv6 address has been defined + * but network->def->ipv6nogw == true + */ + iptablesRemoveForwardAllowCross(AF_INET6, network->def->bridge); + iptablesRemoveForwardRejectIn(AF_INET6, network->def->bridge); + iptablesRemoveForwardRejectOut(AF_INET6, network->def->bridge); +} + +int networkAddGeneralFirewallRules(virNetworkObjPtr network) +{ + size_t i; + virNetworkIpDefPtr ipv4def; + + /* First look for first IPv4 address that has dhcp or tftpboot defined. */ + /* We support dhcp config on 1 IPv4 interface only. */ + for (i = 0; + (ipv4def = virNetworkDefGetIpByIndex(network->def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) + break; + } + + /* allow DHCP requests through to dnsmasq */ + + if (iptablesAddTcpInput(AF_INET, network->def->bridge, 67) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow DHCP requests from '%s'"), + network->def->bridge); + goto err1; + } + + if (iptablesAddUdpInput(AF_INET, network->def->bridge, 67) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow DHCP requests from '%s'"), + network->def->bridge); + goto err2; + } + + /* If we are doing local DHCP service on this network, attempt to + * add a rule that will fixup the checksum of DHCP response + * packets back to the guests (but report failure without + * aborting, since not all iptables implementations support it). + */ + + if (ipv4def && (ipv4def->nranges || ipv4def->nhosts) && + (iptablesAddOutputFixUdpChecksum(network->def->bridge, 68) < 0)) { + VIR_WARN("Could not add rule to fixup DHCP response checksums " + "on network '%s'.", network->def->name); + VIR_WARN("May need to update iptables package & kernel to support CHECKSUM rule."); + } + + /* allow DNS requests through to dnsmasq */ + if (iptablesAddTcpInput(AF_INET, network->def->bridge, 53) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow DNS requests from '%s'"), + network->def->bridge); + goto err3; + } + + if (iptablesAddUdpInput(AF_INET, network->def->bridge, 53) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow DNS requests from '%s'"), + network->def->bridge); + goto err4; + } + + /* allow TFTP requests through to dnsmasq if necessary */ + if (ipv4def && ipv4def->tftproot && + iptablesAddUdpInput(AF_INET, network->def->bridge, 69) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow TFTP requests from '%s'"), + network->def->bridge); + goto err5; + } + + /* Catch all rules to block forwarding to/from bridges */ + + if (iptablesAddForwardRejectOut(AF_INET, network->def->bridge) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to block outbound traffic from '%s'"), + network->def->bridge); + goto err6; + } + + if (iptablesAddForwardRejectIn(AF_INET, network->def->bridge) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to block inbound traffic to '%s'"), + network->def->bridge); + goto err7; + } + + /* Allow traffic between guests on the same bridge */ + if (iptablesAddForwardAllowCross(AF_INET, network->def->bridge) < 0) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("failed to add iptables rule to allow cross bridge traffic on '%s'"), + network->def->bridge); + goto err8; + } + + /* add IPv6 general rules, if needed */ + if (networkAddGeneralIp6tablesRules(network) < 0) { + goto err9; + } + + return 0; + + /* unwind in reverse order from the point of failure */ +err9: + iptablesRemoveForwardAllowCross(AF_INET, network->def->bridge); +err8: + iptablesRemoveForwardRejectIn(AF_INET, network->def->bridge); +err7: + iptablesRemoveForwardRejectOut(AF_INET, network->def->bridge); +err6: + if (ipv4def && ipv4def->tftproot) { + iptablesRemoveUdpInput(AF_INET, network->def->bridge, 69); + } +err5: + iptablesRemoveUdpInput(AF_INET, network->def->bridge, 53); +err4: + iptablesRemoveTcpInput(AF_INET, network->def->bridge, 53); +err3: + iptablesRemoveUdpInput(AF_INET, network->def->bridge, 67); +err2: + iptablesRemoveTcpInput(AF_INET, network->def->bridge, 67); +err1: + return -1; +} + +void networkRemoveGeneralFirewallRules(virNetworkObjPtr network) +{ + size_t i; + virNetworkIpDefPtr ipv4def; + + networkRemoveGeneralIp6tablesRules(network); + + for (i = 0; + (ipv4def = virNetworkDefGetIpByIndex(network->def, AF_INET, i)); + i++) { + if (ipv4def->nranges || ipv4def->nhosts || ipv4def->tftproot) + break; + } + + iptablesRemoveForwardAllowCross(AF_INET, network->def->bridge); + iptablesRemoveForwardRejectIn(AF_INET, network->def->bridge); + iptablesRemoveForwardRejectOut(AF_INET, network->def->bridge); + if (ipv4def && ipv4def->tftproot) { + iptablesRemoveUdpInput(AF_INET, network->def->bridge, 69); + } + iptablesRemoveUdpInput(AF_INET, network->def->bridge, 53); + iptablesRemoveTcpInput(AF_INET, network->def->bridge, 53); + if (ipv4def && (ipv4def->nranges || ipv4def->nhosts)) { + iptablesRemoveOutputFixUdpChecksum(network->def->bridge, 68); + } + iptablesRemoveUdpInput(AF_INET, network->def->bridge, 67); + iptablesRemoveTcpInput(AF_INET, network->def->bridge, 67); +} + +int networkAddIpSpecificFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef) +{ + /* NB: in the case of IPv6, routing rules are added when the + * forward mode is NAT. This is because IPv6 has no NAT. + */ + + if (network->def->forward.type == VIR_NETWORK_FORWARD_NAT) { + if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) + return networkAddMasqueradingFirewallRules(network, ipdef); + else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) + return networkAddRoutingFirewallRules(network, ipdef); + } else if (network->def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { + return networkAddRoutingFirewallRules(network, ipdef); + } + return 0; +} + +void networkRemoveIpSpecificFirewallRules(virNetworkObjPtr network, + virNetworkIpDefPtr ipdef) +{ + if (network->def->forward.type == VIR_NETWORK_FORWARD_NAT) { + if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) + networkRemoveMasqueradingFirewallRules(network, ipdef); + else if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) + networkRemoveRoutingFirewallRules(network, ipdef); + } else if (network->def->forward.type == VIR_NETWORK_FORWARD_ROUTE) { + networkRemoveRoutingFirewallRules(network, ipdef); + } +} + +/* Add all rules for all ip addresses (and general rules) on a network */ +int networkAddFirewallRules(virNetworkObjPtr network) +{ + size_t i, j; + virNetworkIpDefPtr ipdef; + virErrorPtr orig_error; + + /* Add "once per network" rules */ + if (networkAddGeneralFirewallRules(network) < 0) + return -1; + + for (i = 0; + (ipdef = virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, i)); + i++) { + /* Add address-specific iptables rules */ + if (networkAddIpSpecificFirewallRules(network, ipdef) < 0) { + goto err; + } + } + return 0; + +err: + /* store the previous error message before attempting removal of rules */ + orig_error = virSaveLastError(); + + /* The final failed call to networkAddIpSpecificFirewallRules will + * have removed any rules it created, but we need to remove those + * added for previous IP addresses. + */ + for (j = 0; j < i; j++) { + if ((ipdef = virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, j))) + networkRemoveIpSpecificFirewallRules(network, ipdef); + } + networkRemoveGeneralFirewallRules(network); + + /* return the original error */ + virSetError(orig_error); + virFreeError(orig_error); + return -1; +} + +/* Remove all rules for all ip addresses (and general rules) on a network */ +void networkRemoveFirewallRules(virNetworkObjPtr network) +{ + size_t i; + virNetworkIpDefPtr ipdef; + + for (i = 0; + (ipdef = virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, i)); + i++) { + networkRemoveIpSpecificFirewallRules(network, ipdef); + } + networkRemoveGeneralFirewallRules(network); +} diff --git a/src/network/bridge_driver_nop.c b/src/network/bridge_driver_nop.c new file mode 100644 index 0000000..f983402 --- /dev/null +++ b/src/network/bridge_driver_nop.c @@ -0,0 +1,78 @@ +/* + * Copyright (C) 2006-2013 Red Hat, Inc. + * Copyright (C) 2006 Daniel P. Berrange + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + * + * Author: Daniel P. Berrange <berrange(a)redhat.com> + */ + +#include <config.h> + +int networkCheckRouteCollision(virNetworkObjPtr network) +{ + return 0; +} + +int networkAddMasqueradingFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED, + virNetworkIpDefPtr ipdef ATTRIBUTE_UNUSED) +{ + return 0; +} + +void networkRemoveMasqueradingFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED, + virNetworkIpDefPtr ipdef ATTRIBUTE_UNUSED) +{ +} + +int networkAddRoutingFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED, + virNetworkIpDefPtr ipdef ATTRIBUTE_UNUSED) +{ + return 0; +} + +void networkRemoveRoutingFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED, + virNetworkIpDefPtr ipdef ATTRIBUTE_UNUSED) +{ +} + +int networkAddGeneralFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED) +{ + return 0; +} + +void networkRemoveGeneralFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED) +{ +} + +int networkAddIpSpecificFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED, + virNetworkIpDefPtr ipdef ATTRIBUTE_UNUSED) +{ + return 0; +} + +void networkRemoveIpSpecificFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED, + virNetworkIpDefPtr ipdef ATTRIBUTE_UNUSED) +{ +} + +int networkAddFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED) +{ + return 0; +} + +void networkRemoveFirewallRules(virNetworkObjPtr network ATTRIBUTE_UNUSED) +{ +} diff --git a/src/network/bridge_driver_platform.c b/src/network/bridge_driver_platform.c new file mode 100644 index 0000000..1d2fc02 --- /dev/null +++ b/src/network/bridge_driver_platform.c @@ -0,0 +1,32 @@ +/* + * bridge_driver_platform.c: platform specific part of bridge driver + * + * Copyright (C) 2006-2013 Red Hat, Inc. + * Copyright (C) 2006 Daniel P. Berrange + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>. + * + * Author: Daniel P. Berrange <berrange(a)redhat.com> + */ + +#include <config.h> + +#include "bridge_driver_platform.h" + +#if defined(__linux__) +# include "bridge_driver_linux.c" +#else +# include "bridge_driver_nop.c" +#endif diff --git a/po/POTFILES.in b/po/POTFILES.in index 1fd84af..24b32db 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -70,6 +70,7 @@ src/lxc/lxc_process.c src/libxl/libxl_driver.c src/libxl/libxl_conf.c src/network/bridge_driver.c +src/network/bridge_driver_linux.c src/node_device/node_device_driver.c src/node_device/node_device_hal.c src/node_device/node_device_linux_sysfs.c diff --git a/src/Makefile.am b/src/Makefile.am index 84372cb..80309fa 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -725,8 +725,9 @@ PARALLELS_DRIVER_SOURCES = \ parallels/parallels_storage.c \ parallels/parallels_network.c -NETWORK_DRIVER_SOURCES = \ - network/bridge_driver.h network/bridge_driver.c +NETWORK_DRIVER_SOURCES = \ + network/bridge_driver.h network/bridge_driver.c \ + network/bridge_driver_platform.h network/bridge_driver_platform.c INTERFACE_DRIVER_SOURCES = -- 1.7.9.5

2 2

[libvirt] [PATCH 0/2] Coverity/Valgrind issues
by John Ferlan 02 Aug '13

02 Aug '13

One new Coverity defect was discovered from existing code in this mornings run. Also recent changes seem to have adjusted tests and provoked valgrind to find/display potential leaks. That path had already been vetted previously in a shorter stack trace - just adjust the trace to allow inclusion of more traces. John Ferlan (2): tests: Coverity found new NULL_RETURNS valgrind: Adjust filter for _dl_allocate_tls tests/.valgrind.supp | 6 ++++-- tests/jsontest.c | 8 +++++++- 2 files changed, 11 insertions(+), 3 deletions(-) -- 1.8.1.4

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[libvirt] Libvirt not getting connected to ESX server
by varun bhatnagar 02 Aug '13

02 Aug '13

Hi, I was trying to connect to ESX server using libvirt's virsh console but I am getting the following error: *virsh# connect esx://172.16.73.14* *Enter username for 172.16.73.14 [root]: root* *Enter root's password for 172.16.73.14:* *error: Failed to connect to the hypervisor* *error: internal error curl_easy_perform() returned an error: Peer certificate cannot be authenticated with known CA certificates (60) : SSL certificate problem, verify that the CA cert is OK. Details:* *error: 14090086:SSL routine:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed.* * * Can anyone please help me out with this one and tell me how to resolve this error? Regards, Varun

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[libvirt] [PATCH 00/20] tests: add qemu agent test
by Peter Krempa 01 Aug '13

01 Aug '13

As promised earlier I'm sending a unit test for guest agent interaction. This series contains a few refactors and additions of monitor test utils and then add tests for all agent interaction functions. The refactors done in this series will allow to do a more thorough testing on the json monitor too. The small drawback of this test suite is a 6 second run time introduced to test timeout of a guest agent command. The test may be removed in case it's too much. Peter Krempa (20): conf: Export virDomainChrSourceDefClear() qemu_agent: Output newline at the end of the sync JSON message qemu_agent: Move updater function for VCPU hotplug into qemu_agent.c qemu_agent: Remove obvious comments qemumonitortestutils: Use consistent header style and line spacing qemumonitortestutils: Use VIR_DELETE_ELEMENT and VIR_APPEND_ELEMENT qemumonitortestutils: remove multiline function calls qemumonitortestutils: Don't crash on non fully initialized test qemumonitortestutils: Split up creation of the test to allow reuse qemumonitortestutils: Refactor the test helpers to allow reuse qemumonitortestutils: Split lines on \n instead of \r\n qemumonitortestutils: Add instrumentation for guest agent testing qemumonitortestutils: Improve error reporting from mock qemu monitor qemumonitortestutils: Add the ability to check arguments of commands tests: Add qemuagenttest qemuagenttest: Test the filesystem trimming qemuagenttest: Add testing of agent suspend modes qemuagenttest: Introduce testing of shutdown commands qemuagenttest: Test arbitrary qemu commands and timeouting of commands qemuagenttest: Add tests for CPU plug functions and helpers .gitignore | 1 + src/conf/domain_conf.c | 2 +- src/conf/domain_conf.h | 2 + src/libvirt_private.syms | 1 + src/qemu/qemu_agent.c | 73 ++++- src/qemu/qemu_agent.h | 3 + src/qemu/qemu_driver.c | 64 +--- tests/Makefile.am | 11 +- tests/qemuagenttest.c | 580 ++++++++++++++++++++++++++++++++++++ tests/qemumonitortestutils.c | 684 +++++++++++++++++++++++++++++++++---------- tests/qemumonitortestutils.h | 39 ++- 11 files changed, 1231 insertions(+), 229 deletions(-) create mode 100644 tests/qemuagenttest.c -- 1.8.3.2

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[libvirt] [PATCH 0/2] add VIR_TEST_EXPENSIVE for faster 'make check' by default
by Eric Blake 01 Aug '13

01 Aug '13

Based on discussion of Peter's recent test additions, and whether we should sleep waiting for a timeout by default. I did _not_ wire up the use of VIR_TEST_EXPENSIVE as a way to bypass Peter's sleep test, although I can help with that as needed (although in Peter's case, it may be simpler to just getenv("VIR_TEST_EXPENSIVE") inside the C code, instead of trying to hack tests/Makefile.am to be conditional). Tested with 'make distcheck' in both in-tree and VPATH builds (which also the configure defaults when unpacking a tarball), and in setups where I explicitly used --enable-gnulib-tests or --disable-gnulib-tests, vs. running 'make check VIR_TEST_EXPENSIVE=1'; in all cases, the gnulib tests were skipped only when expected. Patch 1/2 is something I noticed on the side (basically side work from my first approach to compile out the directory at configure time, but that approach failed 'make check'); patch 2/2 can be applied independently, and this is only a series because both patches touch configure. I realized (only now that I am sending this patch) that my patch is one-way: you can turn on expensive tests (either at configure time or at runtime) but can't turn them off. Automake was able to have 'make V=0' and 'make V=1' override configure defaults in both directions by using nested make expansion, so if it is deemed necessary, I could respin to try that approach instead of the approach I used here, where an explicit VIR_TEST_EXPENSIVE=0 would then disable the tests regardless of the choice made during configure. On the other hand, having only a one-way road for turning on tests, with no counterpart for turning them off, seems adequate. I'm also open to bikeshedding, such as whether the configure options should be named --enable-expensive-tests instead of --enable-gnulib-tests, on the grounds that we might want to make tests/Makefile.am conditional after all. Eric Blake (2): maint: use modern autoconf idioms build: add configure option to disable gnulib tests HACKING | 9 ++++++++ autobuild.sh | 3 +++ bootstrap.conf | 3 ++- configure.ac | 60 ++++++++++++++++++++++++++++++++---------------- docs/hacking.html.in | 13 +++++++++++ gnulib/tests/Makefile.am | 13 ++++++++++- libvirt.spec.in | 1 + mingw-libvirt.spec.in | 4 ++-- 8 files changed, 82 insertions(+), 24 deletions(-) -- 1.8.3.1

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[libvirt] ANNOUNCE: libvirt-sandbox "Sahara Desert" release 0.5.0
by Daniel P. Berrange 01 Aug '13

01 Aug '13

I pleased to announce the a new public release of libvirt-sandbox, version 0.5.0, is now available for download ftp://libvirt.org/libvirt/sandbox/ The packages are GPG signed with Key fingerprint: DAF3 A6FD B26B 6291 2D0E 8E3F BE86 EBB4 1510 4FDF (4096R) The libvirt-sandbox package provides an API layer on top of libvirt-gobject which facilitates the cration of application sandboxes using virtualization technology. An application sandbox is a virtual machine or container that runs a single application binary, directly from the host OS filesystem. In other words there is no separate guest operating system install to build or manager. At this point in time libvirt-sandbox can create sandboxes using either LXC or KVM, and should in theory be extendable to any libvirt driver. This release has focused entirely on improving the virt-sandbox-service tool This release focused on major feature development. Changed in this release: - Switch to use persistent libvirt configuration files for service sandboxes - Store service configs in /etc/libvirt-sandbox/services/$NAME/ instead of /etc/libvirt-sandbox/services/$NAME.sandbox to allow storage of multiple files per sandbox - Add a new 'virt-sandbox-service upgrade NAME' command, to be run by admin for all existing service sandboxes to upgrade their configuration to be compatible with the new release - Remove start, stop, list commands from virt-sandbox-service, with recomendation to use start, destroy & list commands in virsh instead. - Remove duplicate -u option in man page - Update man page examples - Stop generating a UNIT_sandbox.target unit, instead letting the sandbox unit tie into multi-user.target as normal - Remove unimplemented APIs for graphical sandboxes, to be re-added at a later date when actually functional - Add padding to public structs, to facilitate preservation of public ABI compatibility in future - Add note about default libvirt URIs in man page - Fix cloning of sandboxes Thanks to everyone who contributed to this release Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

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