February 2012 - Devel - libvirt List Archives

[libvirt] [libvirt-glib 1/3] Tell CC to ignore unused macros
by Zeeshan Ali (Khattak) 17 Feb '12

17 Feb '12

From: "Zeeshan Ali (Khattak)" <zeeshanak(a)gnome.org> --- m4/virt-compile-warnings.m4 | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4 index 6659568..de542cc 100644 --- a/m4/virt-compile-warnings.m4 +++ b/m4/virt-compile-warnings.m4 @@ -39,6 +39,8 @@ AC_DEFUN([LIBVIRT_GLIB_COMPILE_WARNINGS],[ dontwarn="$dontwarn -Wdeclaration-after-statement" # Using long long is fine dontwarn="$dontwarn -Wlong-long" + # Unused macros are ok + dontwarn="$dontwarn -Wunused-macros" # g_clear_object & G_ATOMIC_OP_USE_GCC_BUILTINS causes -- 1.7.7.6

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[libvirt] [PATCH] python: Avoid memory leaks on libvirt_virNodeGetCPUStats
by ajia＠redhat.com 17 Feb '12

17 Feb '12

From: Alex Jia <ajia(a)redhat.com> Detected by valgrind. Leaks are introduced in commit 4955602. * python/libvirt-override.c (libvirt_virNodeGetCPUStats): fix memory leaks and improve codes return value. For details, please see the following link: RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=770943 Signed-off-by: Alex Jia <ajia(a)redhat.com> --- python/libvirt-override.c | 46 ++++++++++++++++++++++++++++++-------------- 1 files changed, 31 insertions(+), 15 deletions(-) diff --git a/python/libvirt-override.c b/python/libvirt-override.c index 792cfa3..6e076bc 100644 --- a/python/libvirt-override.c +++ b/python/libvirt-override.c @@ -2503,7 +2503,9 @@ libvirt_virNodeGetCellsFreeMemory(PyObject *self ATTRIBUTE_UNUSED, PyObject *arg static PyObject * libvirt_virNodeGetCPUStats(PyObject *self ATTRIBUTE_UNUSED, PyObject *args) { - PyObject *ret; + PyObject *ret = NULL; + PyObject *key = NULL; + PyObject *val = NULL; PyObject *pyobj_conn; virConnectPtr conn; unsigned int flags; @@ -2512,39 +2514,53 @@ libvirt_virNodeGetCPUStats(PyObject *self ATTRIBUTE_UNUSED, PyObject *args) virNodeCPUStatsPtr stats = NULL; if (!PyArg_ParseTuple(args, (char *)"Oii:virNodeGetCPUStats", &pyobj_conn, &cpuNum, &flags)) - return(NULL); + return ret; conn = (virConnectPtr)(PyvirConnect_Get(pyobj_conn)); LIBVIRT_BEGIN_ALLOW_THREADS; c_retval = virNodeGetCPUStats(conn, cpuNum, NULL, &nparams, flags); LIBVIRT_END_ALLOW_THREADS; if (c_retval < 0) - return VIR_PY_NONE; + return ret; if (nparams) { if (VIR_ALLOC_N(stats, nparams) < 0) - return VIR_PY_NONE; + return PyErr_NoMemory(); LIBVIRT_BEGIN_ALLOW_THREADS; c_retval = virNodeGetCPUStats(conn, cpuNum, stats, &nparams, flags); LIBVIRT_END_ALLOW_THREADS; - if (c_retval < 0) { - VIR_FREE(stats); - return VIR_PY_NONE; - } - } - if (!(ret = PyDict_New())) { - VIR_FREE(stats); - return VIR_PY_NONE; + if (c_retval < 0) + goto error; } + + if (!(ret = PyDict_New())) + goto error; + for (i = 0; i < nparams; i++) { - PyDict_SetItem(ret, - libvirt_constcharPtrWrap(stats[i].field), - libvirt_ulonglongWrap(stats[i].value)); + key = libvirt_constcharPtrWrap(stats[i].field); + val = libvirt_ulonglongWrap(stats[i].value); + + if (!key || !val) + goto error; + + if (PyDict_SetItem(ret, key, val) < 0) { + Py_DECREF(ret); + goto error; + } + + Py_DECREF(key); + Py_DECREF(val); } VIR_FREE(stats); return ret; + +error: + VIR_FREE(stats); + Py_XDECREF(key); + Py_XDECREF(val); + return ret; } static PyObject * -- 1.7.1

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[libvirt] [PATCH] nwfilter: improved logging during driver initialization
by Stefan Berger 17 Feb '12

17 Feb '12

Improve the logging during nwfilter driver initialization when testing the command line tools. --- src/nwfilter/nwfilter_ebiptables_driver.c | 41 +++++++++++++++++++++--------- 1 file changed, 29 insertions(+), 12 deletions(-) Index: libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c =================================================================== --- libvirt-acl.orig/src/nwfilter/nwfilter_ebiptables_driver.c +++ libvirt-acl/src/nwfilter/nwfilter_ebiptables_driver.c @@ -4036,6 +4036,7 @@ static int ebiptablesDriverInit(bool privileged) { virBuffer buf = VIR_BUFFER_INITIALIZER; + char *errmsg = NULL; if (!privileged) return 0; @@ -4056,8 +4057,14 @@ ebiptablesDriverInit(bool privileged) "%s", CMD_STOPONERR(1)); - if (ebiptablesExecCLI(&buf, NULL, NULL) < 0) - VIR_FREE(ebtables_cmd_path); + if (ebiptablesExecCLI(&buf, NULL, &errmsg) < 0) { + VIR_FREE(ebtables_cmd_path); + VIR_ERROR(_("Testing of ebtables command failed%s%s."), + errmsg ? ": " : "", + errmsg ? errmsg : ""); + } + } else { + VIR_WARN(_("Could not find 'ebtables' executable.")); } iptables_cmd_path = virFindFileInPath("iptables"); @@ -4070,8 +4077,14 @@ ebiptablesDriverInit(bool privileged) "%s", CMD_STOPONERR(1)); - if (ebiptablesExecCLI(&buf, NULL, NULL) < 0) - VIR_FREE(iptables_cmd_path); + if (ebiptablesExecCLI(&buf, NULL, &errmsg) < 0) { + VIR_FREE(iptables_cmd_path); + VIR_ERROR(_("Testing of iptables command failed%s%s."), + errmsg ? ": " : "", + errmsg ? errmsg : ""); + } + } else { + VIR_WARN(_("Could not find 'iptables' executable.")); } ip6tables_cmd_path = virFindFileInPath("ip6tables"); @@ -4084,25 +4097,29 @@ ebiptablesDriverInit(bool privileged) "%s", CMD_STOPONERR(1)); - if (ebiptablesExecCLI(&buf, NULL, NULL) < 0) - VIR_FREE(ip6tables_cmd_path); + if (ebiptablesExecCLI(&buf, NULL, &errmsg) < 0) { + VIR_FREE(ip6tables_cmd_path); + VIR_ERROR(_("Testing of ip6tables command failed%s%s."), + errmsg ? ": " : "", + errmsg ? errmsg : ""); + } + } else { + VIR_WARN(_("Could not find 'ip6tables' executable.")); } /* ip(6)tables support needs gawk & grep, ebtables doesn't */ if ((iptables_cmd_path != NULL || ip6tables_cmd_path != NULL) && (!grep_cmd_path || !gawk_cmd_path)) { - virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("essential tools to support ip(6)tables " - "firewalls could not be located")); + VIR_ERROR(_("essential tools to support ip(6)tables " + "firewalls could not be located")); VIR_FREE(iptables_cmd_path); VIR_FREE(ip6tables_cmd_path); } + VIR_FREE(errmsg); if (!ebtables_cmd_path && !iptables_cmd_path && !ip6tables_cmd_path) { - virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("firewall tools were not found or " - "cannot be used")); + VIR_ERROR(_("firewall tools were not found or cannot be used")); ebiptablesDriverShutdown(); return -ENOTSUP; }

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[libvirt] [PATCHv2] qemu: Prevent crash of libvirtd without guest agent
by ajia＠redhat.com 16 Feb '12

16 Feb '12

From: Alex Jia <ajia(a)redhat.com> * src/qemu/qemu_process.c (qemuFindAgentConfig): avoid crash libvirtd due to deref a NULL pointer. * How to reproduce? 1. virsh edit the following xml into guest configuration: <channel type='pty'> <target type='virtio'/> </channel> 2. virsh start <domain> or % virt-install -n foo -r 1024 --disk path=/var/lib/libvirt/images/foo.img,size=1 \ --channel pty,target_type=virtio -l <installation tree> Signed-off-by: Alex Jia <ajia(a)redhat.com> --- src/qemu/qemu_process.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 939a83d..41218de 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -194,7 +194,7 @@ qemuFindAgentConfig(virDomainDefPtr def) if (channel->targetType != VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO) continue; - if (STREQ(channel->target.name, "org.qemu.guest_agent.0")) { + if (STREQ_NULLABLE(channel->target.name, "org.qemu.guest_agent.0")) { config = &channel->source; break; } -- 1.7.1

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[libvirt] [PATCH] qemu: Unlock monitor when connecting to dest qemu fails
by Jiri Denemark 16 Feb '12

16 Feb '12

When migrating a qemu domain, we enter the monitor, send some commands, try to connect to destination qemu, send other commands, end exit the monitor. However, if we couldn't connect to destination qemu we forgot to exit the monitor. Bug introduced by commit d9d518b1c8ef3b65658cc91f85ba33a63c0959a4. --- src/qemu/qemu_migration.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 12cfbde..ea4185e 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -1624,8 +1624,10 @@ qemuMigrationRun(struct qemud_driver *driver, /* connect to the destination qemu if needed */ if (spec->destType == MIGRATION_DEST_CONNECT_HOST && - qemuMigrationConnect(driver, vm, spec) < 0) + qemuMigrationConnect(driver, vm, spec) < 0) { + qemuDomainObjExitMonitorWithDriver(driver, vm); goto cleanup; + } switch (spec->destType) { case MIGRATION_DEST_HOST: -- 1.7.8.4

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[libvirt] [PATCH] qemu: Fix segfault when CPU host is empty
by Jiri Denemark 16 Feb '12

16 Feb '12

In case libvirtd cannot detect host CPU model (which may happen if it runs inside a virtual machine), the daemon is likely to segfault when starting a new qemu domain. It segfaults when domain XML asks for host (either model or passthrough) CPU or does not ask for any specific CPU model at all. --- src/qemu/qemu_command.c | 24 ++++++++++++------------ 1 files changed, 12 insertions(+), 12 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 99d7129..5633dfd 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3508,22 +3508,13 @@ qemuBuildCpuArgStr(const struct qemud_driver *driver, *hasHwVirt = false; - if (def->cpu && - (def->cpu->mode != VIR_CPU_MODE_CUSTOM || def->cpu->model)) { - if (!(cpu = virCPUDefCopy(def->cpu))) - goto cleanup; - if (cpu->mode != VIR_CPU_MODE_CUSTOM && - !migrating && - cpuUpdate(cpu, host) < 0) - goto cleanup; - } - if (STREQ(def->os.arch, "i686")) default_model = "qemu32"; else default_model = "qemu64"; - if (cpu) { + if (def->cpu && + (def->cpu->mode != VIR_CPU_MODE_CUSTOM || def->cpu->model)) { virCPUCompareResult cmp; const char *preferred; int hasSVM; @@ -3539,6 +3530,14 @@ qemuBuildCpuArgStr(const struct qemud_driver *driver, goto cleanup; } + if (!(cpu = virCPUDefCopy(def->cpu))) + goto cleanup; + + if (cpu->mode != VIR_CPU_MODE_CUSTOM && + !migrating && + cpuUpdate(cpu, host) < 0) + goto cleanup; + cmp = cpuGuestData(host, cpu, &data); switch (cmp) { case VIR_CPU_COMPARE_INCOMPATIBLE: @@ -3647,7 +3646,8 @@ qemuBuildCpuArgStr(const struct qemud_driver *driver, ret = 0; cleanup: - cpuDataFree(host->arch, data); + if (host) + cpuDataFree(host->arch, data); virCPUDefFree(guest); virCPUDefFree(cpu); -- 1.7.8.4

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[libvirt] [PATCH v2] storage: Allow runtime detection of scrub
by Michal Privoznik 16 Feb '12

16 Feb '12

Currently, if scrub (used for wiping algorithms) is not present at compile time, we don't support any other wiping algorithms than zeroing, even if it was installed later. Switch to runtime detection instead. --- diff to v1: -Add BuildRequires to spec file configure.ac | 30 ++++-------------------------- libvirt.spec.in | 3 +++ src/storage/storage_driver.c | 4 ---- 3 files changed, 7 insertions(+), 30 deletions(-) diff --git a/configure.ac b/configure.ac index 67351d9..5320f71 100644 --- a/configure.ac +++ b/configure.ac @@ -213,6 +213,8 @@ AC_PATH_PROG([UDEVSETTLE], [udevsettle], [], [/sbin:/usr/sbin:/usr/local/sbin:$PATH]) AC_PATH_PROG([MODPROBE], [modprobe], [], [/sbin:/usr/sbin:/usr/local/sbin:$PATH]) +AC_PATH_PROG([SCRUB], [scrub], [], + [/sbin:/usr/sbin:/usr/local/sbin:$PATH]) AC_DEFINE_UNQUOTED([DNSMASQ],["$DNSMASQ"], [Location or name of the dnsmasq program]) @@ -232,6 +234,8 @@ if test -n "$MODPROBE"; then AC_DEFINE_UNQUOTED([MODPROBE],["$MODPROBE"], [Location or name of the modprobe program]) fi +AC_DEFINE_UNQUOTED([SCRUB],["$SCRUB"], + [Location or name of the scrub program (for wiping algorithms)]) dnl Specific dir for HTML output ? AC_ARG_WITH([html-dir], [AC_HELP_STRING([--with-html-dir=path], @@ -2500,32 +2504,6 @@ AM_CONDITIONAL([HAVE_LIBNL], [test "$have_libnl" = "yes"]) AC_SUBST([LIBNL_CFLAGS]) AC_SUBST([LIBNL_LIBS]) -dnl scrub program for different volume wiping algorithms - -AC_ARG_WITH([scrub], - AC_HELP_STRING([--with-scrub], [enable different volume wiping algorithms - @<:@default=check@:>@]), - [with_macvtap=${withval}], - [with_scrub=check]) - -if test "$with_scrub" != "no"; then - AC_PATH_PROG([SCRUB], [scrub]) - if test -z "$SCRUB" ; then - if test "$with_scrub" = "check"; then - with_scrub=no - else - AC_MSG_ERROR([You must install the 'scrub' binary to enable - different volume wiping algorithms]) - fi - else - with_scrub=yes - fi - if test "$with_scrub" = "yes"; then - AC_DEFINE_UNQUOTED([SCRUB], ["$SCRUB"], - [Location of the scrub program]) - fi -fi - # Only COPYING.LIB is under version control, yet COPYING # is included as part of the distribution tarball. # Copy one to the other, but only if this is a srcdir-build. diff --git a/libvirt.spec.in b/libvirt.spec.in index e48d8b8..3f0f19a 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -513,6 +513,9 @@ BuildRequires: nfs-utils # Fedora build root suckage BuildRequires: gawk +# For storage wiping with different algorithms +BuildRequires: scrub + %description Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). The main package includes diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c index 9170a17..df0e291 100644 --- a/src/storage/storage_driver.c +++ b/src/storage/storage_driver.c @@ -1918,7 +1918,6 @@ storageVolumeWipeInternal(virStorageVolDefPtr def, if (algorithm != VIR_STORAGE_VOL_WIPE_ALG_ZERO) { const char *alg_char ATTRIBUTE_UNUSED = NULL; switch (algorithm) { -#ifdef SCRUB case VIR_STORAGE_VOL_WIPE_ALG_NNSA: alg_char = "nnsa"; break; @@ -1943,13 +1942,11 @@ storageVolumeWipeInternal(virStorageVolDefPtr def, case VIR_STORAGE_VOL_WIPE_ALG_RANDOM: alg_char = "random"; break; -#endif default: virStorageReportError(VIR_ERR_INVALID_ARG, _("unsupported algorithm %d"), algorithm); } -#ifdef SCRUB cmd = virCommandNew(SCRUB); virCommandAddArgList(cmd, "-f", "-p", alg_char, def->target.path, NULL); @@ -1958,7 +1955,6 @@ storageVolumeWipeInternal(virStorageVolDefPtr def, goto out; ret = 0; -#endif goto out; } else { if (S_ISREG(st.st_mode) && st.st_blocks < (st.st_size / DEV_BSIZE)) { -- 1.7.3.4

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[libvirt] question about guest status
by Wen Congyang 16 Feb '12

16 Feb '12

Hi all: If the guest runs on xen, we can know the guest OS paniced, and the guest status is paniced. But if the guest runs on qemu/kvm, we need the same feature. And the feature to know guest-is-panic is a very very good feature for enterprise. We have some ways to know that guest has paniced: 1. watchdog timeouts It is not a good way, because we can not say "the guest is paniced" in 100% accuracy 2. use a PV driver(like the XEN) The old RHELs do not have such driver... It can not work for the second kernel... 3. Adding a function for console-logging (in ring buffer or some) and check messages given by guests. If we allow some filtering script or some, we can catch Linux's panic messages. We can say the guest paniced if we catch such messages. We may be able to catch other events by other script I prefer to 3 now. Does anyone have a better idea? Thanks Wen Congyang

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[libvirt] Anyone up for a libvirt webcast on FLOSS Weekly Podcasts
by Justin Clift 16 Feb '12

16 Feb '12

Hi all, Looking for someone to do a webcast about Libvirt, for the FLOSS Weekly podcast: http://twit.tv/show/floss-weekly Preferably someone pretty well known in the Libvirt Community (commit access maybe?). Said person must have decent bandwidth for the webcast connection, and be comfortable using Skype. Already asked DV who would, except he's very bandwidth limited, and the timezone (US/Los Angeles) is a pita for him. :( So, need an alternative person. :) The existing schedule is online: http://xrl.us/flossweeklyguests Anyone interested? Regards and best wishes, Justin Clift -- Aeolus Community Manager http://www.aeolusproject.org

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[libvirt] [PATCH] daemon: fix logic bug with virAsprintf
by Eric Blake 16 Feb '12

16 Feb '12

Regression introduced in commit 7033c5f2, due to improper conversion from snprintf to virAsprintf. * daemon/remote.c (remoteDispatchAuthList): Check return value correctly. --- This one's embarrassing. I think I broke polkit authorization in 0.9.10. :( daemon/remote.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/daemon/remote.c b/daemon/remote.c index 9c61306..724db23 100644 --- a/daemon/remote.c +++ b/daemon/remote.c @@ -2052,7 +2052,7 @@ remoteDispatchAuthList(virNetServerPtr server ATTRIBUTE_UNUSED, } else if (callerUid == 0) { char *ident; if (virAsprintf(&ident, "pid:%lld,uid:%d", - (long long) callerPid, callerUid) == 0) { + (long long) callerPid, callerUid) >= 0) { VIR_INFO("Bypass polkit auth for privileged client %s", ident); if (virNetServerClientSetIdentity(client, ident) < 0) -- 1.7.7.6

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