April 2010 - Devel - libvirt List Archives

[libvirt] Question on xm and virsh listing
by Nandini Chandra 24 Apr '10

24 Apr '10

I'd like to understand the exact mechanism for retrieving the list of guests by xm/xend and virsh/libvirt.In what situations could the output of 'xm list' differ from 'virsh list'?Which of these two is more accurate? I'd appreciate any pointers. Thanks.

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[libvirt] libvir and VDE
by Erik de Castro Lopo 24 Apr '10

24 Apr '10

Hi all, I am currently looking at looking at virsh to mamange my kvm and qemu VMs, but find that libvir doesn't support VDE networking which I prefer over other networking options. An obvious first step to adding support for VDE networking would be to allow the domxml-from-native subcommand to parse "-net vde" arguments like: -net vde,vlan=0,group=vde2-net,mode=0770,sock=/var/run/qemu-vde-ctl Apart from that, what else is required to support VDE networks in libvir? Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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[libvirt] [PATCH] Fix handling of security driver restore failures in QEMU domain save
by Daniel P. Berrange 24 Apr '10

24 Apr '10

In cases where the security driver failed to restore a label after a guest has saved, we mistakenly jumped to the error cleanup paths. This is not good, because the operation has in fact completed and cannot be rolled back completely. Label restore is non-critical, so just log the problem instead. Also add a missing restore call in the error cleanup path * src/qemu/qemu_driver.c: Fix handling of security driver restore failures in QEMU domain save --- src/qemu/qemu_driver.c | 48 +++++++++++++++++++++++++----------------------- 1 files changed, 25 insertions(+), 23 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index faecfb7..862c030 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -5052,16 +5052,13 @@ static int qemudDomainSaveFlag(virDomainPtr dom, const char *path, driver->securityDriver && driver->securityDriver->domainRestoreSavedStateLabel && driver->securityDriver->domainRestoreSavedStateLabel(vm, path) == -1) - goto endjob; + VIR_WARN("failed to restore save state label on %s", path); if (cgroup != NULL) { rc = virCgroupDenyDevicePath(cgroup, path); - if (rc != 0) { - virReportSystemError(-rc, - _("Unable to deny device %s for %s"), - path, vm->def->name); - goto endjob; - } + if (rc != 0) + VIR_WARN("Unable to deny device %s for %s %d", + path, vm->def->name, rc); } ret = 0; @@ -5080,24 +5077,29 @@ static int qemudDomainSaveFlag(virDomainPtr dom, const char *path, endjob: if (vm) { - if (ret != 0 && header.was_running && priv->mon) { - qemuDomainObjEnterMonitorWithDriver(driver, vm); - rc = qemuMonitorStartCPUs(priv->mon, dom->conn); - qemuDomainObjExitMonitorWithDriver(driver, vm); - if (rc < 0) - VIR_WARN0("Unable to resume guest CPUs after save failure"); - else - vm->state = VIR_DOMAIN_RUNNING; - } + if (ret != 0) { + if (header.was_running && priv->mon) { + qemuDomainObjEnterMonitorWithDriver(driver, vm); + rc = qemuMonitorStartCPUs(priv->mon, dom->conn); + qemuDomainObjExitMonitorWithDriver(driver, vm); + if (rc < 0) + VIR_WARN0("Unable to resume guest CPUs after save failure"); + else + vm->state = VIR_DOMAIN_RUNNING; + } - if (ret != 0 && cgroup != NULL) { - rc = virCgroupDenyDevicePath(cgroup, path); - if (rc != 0) { - virReportSystemError(-rc, - _("Unable to deny device %s for %s"), - path, vm->def->name); - goto endjob; + if (cgroup != NULL) { + rc = virCgroupDenyDevicePath(cgroup, path); + if (rc != 0) + VIR_WARN("Unable to deny device %s for %s: %d", + path, vm->def->name, rc); } + + if ((!bypassSecurityDriver) && + driver->securityDriver && + driver->securityDriver->domainRestoreSavedStateLabel && + driver->securityDriver->domainRestoreSavedStateLabel(vm, path) == -1) + VIR_WARN("failed to restore save state label on %s", path); } if (qemuDomainObjEndJob(vm) == 0) -- 1.6.5.2

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[libvirt] Error saving/restoring VM with attached disks
by Shi Jin 23 Apr '10

23 Apr '10

Hi there, I have been playing with libvirt/KVM on saving the VM to a checkpoint file and restoring it from this file. It has worked very well for me on my RHEL-5.5 setup, until I added hot-plugged volumes. If I add a volume to a running VM using "virsh attach-disk" and then call "virsh save". The checkpoint file was successfully written and VM stopped. However, I get errors restoring it with "virsh restore": $ virsh restore checkpoint error: Failed to restore domain from checkpoint error: operation failed: failed to start VM I did two thinngs to narrow down the problem: 1. If I manually remove the lines of attached volume from the checkpoint file, then it restores fine. 2. If I have the additioinal volumes in the original XML template instead of hot-plugging them on the fly, the save/restore work very well. So I think the problem is in save/restore hot-plugged volumes. Do you think this is a bug or an expected behaviour? Should I file a bug report? Any fix already? Thank you very much. Shi -- Shi Jin, PhD

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[libvirt] [PATCH] cygwin: Check explicitly for getmntent_r
by Matthias Bolte 23 Apr '10

23 Apr '10

Cygwin has mntent.h but lacks getmntent_r. Update preprocessor checks to catch this combination. --- src/qemu/qemu_conf.c | 2 +- src/util/cgroup.c | 10 +++++----- src/util/util.c | 8 ++++---- 3 files changed, 10 insertions(+), 10 deletions(-) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 2cbcc4f..ed24916 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -114,7 +114,7 @@ int qemudLoadDriverConfig(struct qemud_driver *driver, return -1; } -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R /* For privileged driver, try and find hugepage mount automatically. * Non-privileged driver requires admin to create a dir for the * user, chown it, and then let user configure it manually */ diff --git a/src/util/cgroup.c b/src/util/cgroup.c index 4cb09b6..b649c3c 100644 --- a/src/util/cgroup.c +++ b/src/util/cgroup.c @@ -12,7 +12,7 @@ #include <stdio.h> #include <stdint.h> -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R # include <mntent.h> #endif #include <fcntl.h> @@ -69,7 +69,7 @@ void virCgroupFree(virCgroupPtr *group) VIR_FREE(*group); } -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R /* * Process /proc/mounts figuring out what controllers are * mounted and where @@ -403,7 +403,7 @@ out: } -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R static int virCgroupCpuSetInherit(virCgroupPtr parent, virCgroupPtr group) { int i; @@ -628,7 +628,7 @@ int virCgroupAddTask(virCgroupPtr group, pid_t pid) * * Returns 0 on success */ -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R int virCgroupForDriver(const char *name, virCgroupPtr *group, int privileged, @@ -682,7 +682,7 @@ int virCgroupForDriver(const char *name ATTRIBUTE_UNUSED, * * Returns 0 on success */ -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R int virCgroupForDomain(virCgroupPtr driver, const char *name, virCgroupPtr *group, diff --git a/src/util/util.c b/src/util/util.c index 99383d1..a7bb67c 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -61,7 +61,7 @@ #if HAVE_CAPNG # include <cap-ng.h> #endif -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R # include <mntent.h> #endif @@ -2716,7 +2716,7 @@ int virGetGroupID(const char *name ATTRIBUTE_UNUSED, #endif /* HAVE_GETPWUID_R */ -#ifdef HAVE_MNTENT_H +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R /* search /proc/mounts for mount point of *type; return pointer to * malloc'ed string of the path if found, otherwise return NULL * with errno set to an appropriate value. @@ -2748,7 +2748,7 @@ cleanup: return ret; } -#else /* HAVE_MNTENT_H */ +#else /* defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R */ char * virFileFindMountPoint(const char *type ATTRIBUTE_UNUSED) @@ -2758,7 +2758,7 @@ virFileFindMountPoint(const char *type ATTRIBUTE_UNUSED) return NULL; } -#endif /* HAVE_MNTENT_H */ +#endif /* defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R */ #ifndef PROXY # if defined(UDEVADM) || defined(UDEVSETTLE) -- 1.6.3.3

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[libvirt] [PATCH] Some NWFilter symbols are conditional and have to be exported conditional
by Matthias Bolte 23 Apr '10

23 Apr '10

--- src/Makefile.am | 7 ++++++- src/libvirt_nwfilter.syms | 14 ++++++++++++++ src/libvirt_private.syms | 13 +------------ 3 files changed, 21 insertions(+), 13 deletions(-) create mode 100644 src/libvirt_nwfilter.syms diff --git a/src/Makefile.am b/src/Makefile.am index 66dc349..17b2226 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -884,6 +884,10 @@ if WITH_LIBVIRTD USED_SYM_FILES += libvirt_daemon.syms endif +if WITH_NWFILTER +USED_SYM_FILES += libvirt_nwfilter.syms +endif + EXTRA_DIST += \ libvirt_public.syms \ libvirt_private.syms \ @@ -891,7 +895,8 @@ EXTRA_DIST += \ libvirt_bridge.syms \ libvirt_linux.syms \ libvirt_macvtap.syms \ - libvirt_daemon.syms + libvirt_daemon.syms \ + libvirt_nwfilter.syms BUILT_SOURCES += libvirt.syms libvirt.def diff --git a/src/libvirt_nwfilter.syms b/src/libvirt_nwfilter.syms new file mode 100644 index 0000000..106415f --- /dev/null +++ b/src/libvirt_nwfilter.syms @@ -0,0 +1,14 @@ +# +# These symbols are dependent on WITH_NWFILTER. +# + + +# nwfilter_gentech_driver.h +virNWFilterInstantiateFilter; +virNWFilterTeardownFilter; + + +# nwfilter_learnipaddr.h +virNWFilterGetIpAddrForIfname; +virNWFilterDelIpAddrForIfname; +virNWFilterLookupLearnReq; diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 7950bcd..f8e9d01 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -502,7 +502,7 @@ virNWFilterLockFilterUpdates; virNWFilterUnlockFilterUpdates; -#nwfilter_params.h +# nwfilter_params.h virNWFilterHashTableCreate; virNWFilterHashTableFree; virNWFilterHashTablePut; @@ -510,17 +510,6 @@ virNWFilterHashTablePutAll; virNWFilterHashTableRemoveEntry; -# nwfilter_gentech_driver.h -virNWFilterInstantiateFilter; -virNWFilterTeardownFilter; - - -# nwfilter_learnipaddr.h -virNWFilterGetIpAddrForIfname; -virNWFilterDelIpAddrForIfname; -virNWFilterLookupLearnReq; - - # pci.h pciGetDevice; pciFreeDevice; -- 1.6.3.3

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[libvirt] [PATCH] xen: Fix inside_daemon being unused when libvirtd is disabled
by Matthias Bolte 23 Apr '10

23 Apr '10

The defined __sun is there, because inside_daemon is used in xenUnifiedOpen if __sun is defined. Also initialize it to 0. --- src/xen/xen_driver.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/src/xen/xen_driver.c b/src/xen/xen_driver.c index 5ab169d..b16a16a 100644 --- a/src/xen/xen_driver.c +++ b/src/xen/xen_driver.c @@ -70,7 +70,9 @@ static struct xenUnifiedDriver const * const drivers[XEN_UNIFIED_NR_DRIVERS] = { #endif }; -static int inside_daemon; +#if defined WITH_LIBVIRTD || defined __sun +static int inside_daemon = 0; +#endif #define xenUnifiedError(code, ...) \ virReportErrorHelper(NULL, VIR_FROM_XEN, code, __FILE__, \ -- 1.6.3.3

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[libvirt] [PATCH] Disable stateful OpenNebula driver if libvirtd is disabled
by Matthias Bolte 23 Apr '10

23 Apr '10

Also move the equivalent checks for LXC and UML before their header checks. This way configure doesn't check for the headers when the driver gets disabled anyway. --- configure.ac | 15 +++++++++------ 1 files changed, 9 insertions(+), 6 deletions(-) diff --git a/configure.ac b/configure.ac index e34f417..aeab7d9 100644 --- a/configure.ac +++ b/configure.ac @@ -484,6 +484,9 @@ AC_CHECK_HEADERS([linux/kvm.h]) dnl dnl check for sufficient headers for LXC dnl +if test "$with_libvirtd" = "no" ; then + with_lxc=no +fi if test "$with_lxc" = "yes" || test "$with_lxc" = "check"; then AC_CHECK_HEADER([sched.h], dnl Header is there, check for unshare() @@ -514,9 +517,6 @@ if test "$with_lxc" = "yes" || test "$with_lxc" = "check"; then ]) fi -if test "$with_libvirtd" = "no" ; then - with_lxc=no -fi if test "$with_lxc" = "yes" ; then AC_DEFINE_UNQUOTED([WITH_LXC], 1, [whether LXC driver is enabled]) fi @@ -538,6 +538,9 @@ PKG_PROG_PKG_CONFIG dnl OpenNebula driver Compilation setting dnl +if test "$with_libvirtd" = "no" ; then + with_one=no +fi XMLRPC_CFLAGS= XMLRPC_LIBS= if test "x$with_one" = "xyes" || test "x$with_one" = "xcheck"; then @@ -1071,6 +1074,9 @@ dnl dnl Checks for the UML driver dnl +if test "$with_libvirtd" = "no" ; then + with_uml=no +fi if test "$with_uml" = "yes" || test "$with_uml" = "check"; then AC_CHECK_HEADER([sys/inotify.h], [ with_uml=yes @@ -1083,9 +1089,6 @@ if test "$with_uml" = "yes" || test "$with_uml" = "check"; then fi ]) fi -if test "$with_libvirtd" = "no" ; then - with_uml=no -fi if test "$with_uml" = "yes" ; then AC_DEFINE_UNQUOTED([WITH_UML], 1, [whether UML driver is enabled]) fi -- 1.6.3.3

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[libvirt] [PATCH] Improve configure error message about missing Linux headers
by Matthias Bolte 23 Apr '10

23 Apr '10

--- configure.ac | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/configure.ac b/configure.ac index 99bc906..e34f417 100644 --- a/configure.ac +++ b/configure.ac @@ -528,7 +528,7 @@ dnl check for kernel headers required by src/bridge.c dnl if test "$with_qemu" = "yes" || test "$with_lxc" = "yes" ; then AC_CHECK_HEADERS([linux/param.h linux/sockios.h linux/if_bridge.h linux/if_tun.h],, - AC_MSG_ERROR([You must install kernel-headers in order to compile libvirt])) + AC_MSG_ERROR([You must install kernel-headers in order to compile libvirt with QEMU or LXC support])) fi -- 1.6.3.3

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[libvirt] [PATCH] build: don't include winsock2.h on cygwin
by Eric Blake 23 Apr '10

23 Apr '10

Under cygwin, winsock2.h is intentionally incompatible with, <sys/socket.h>, and checking for existence is wrong. Under mingw, HAVE_WINSOCK2_H is defined on our behalf by gnulib, in a way that does not interfere with cygwin. * configure.ac: Drop unnecessary header check. Reported by Matthias Bolte. --- configure.ac | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/configure.ac b/configure.ac index 99bc906..deaa697 100644 --- a/configure.ac +++ b/configure.ac @@ -112,7 +112,8 @@ dnl Availability of various not common threadsafe functions AC_CHECK_FUNCS([strerror_r strtok_r getmntent_r getgrnam_r getpwuid_r]) dnl Availability of various common headers (non-fatal if missing). -AC_CHECK_HEADERS([pwd.h paths.h regex.h sys/syslimits.h sys/utsname.h sys/wait.h winsock2.h sched.h termios.h sys/poll.h syslog.h mntent.h net/ethernet.h]) +AC_CHECK_HEADERS([pwd.h paths.h regex.h sys/syslimits.h sys/utsname.h + sys/wait.h sched.h termios.h sys/poll.h syslog.h mntent.h net/ethernet.h]) dnl Where are the XDR functions? dnl If portablexdr is installed, prefer that. -- 1.6.6.1

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