[libvirt] [libvirt-list] question about the commands: domhostname and hostname
by Li Zhang
Hi all,
I am testing the virsh commands, and I found that these two commands:
* domhostname
* hostname
>From the manual of virsh commands:
* hostname
Print the hypervisor hostname.
* domhostname domain
Returns the hostname of a domain, if the hypervisor makes
it available
It seems that both of them want to get the host name. What's the
difference between them?
>From the source code, domhostname only is supported for openvz on 0.10.1.
Will this be only for openvz in the future?
Any idea?
Thanks a lot in advance. -:)
--
Best Regards
-Li
12 years, 2 months
[libvirt] [PATCH] fix-up an implicit build dead-loop in cfg.mk
by liguang
if gnulib submodule happened to be dirty, build
process will fall into '_autogen' target trap
in cfg.mk recursively, so break this dead-loop.
Signed-off-by: liguang <lig.fnst(a)cn.fujitsu.com>
---
cfg.mk | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/cfg.mk b/cfg.mk
index bbfd4a2..92966d5 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -699,7 +699,7 @@ ifeq (0,$(MAKELEVEL))
test "$$stamp" = "$$actual"; echo $$?)
_clean_requested = $(filter %clean,$(MAKECMDGOALS))
ifeq (1,$(_update_required)$(_clean_requested))
- $(info INFO: gnulib update required; running ./autogen.sh first)
+ $(error ERR: gnulib update required; running ./autogen.sh first)
Makefile: _autogen
endif
endif
--
1.7.2.5
12 years, 2 months
[libvirt] Core dump caused by misusing openssl in multithread scenario!
by Benjamin Wang (gendwang)
Hi,
I am running libvirt with ESXi driver in multithread scenario to access ESXi by https. Sometimes a core dump will be generated as following:
#0 0x0000003f9b030265 in raise () from /lib64/libc.so.6
#1 0x0000003f9b031d10 in abort () from /lib64/libc.so.6
#2 0x0000003f9b06a84b in __libc_message () from /lib64/libc.so.6
#3 0x0000003f9b072fae in _int_malloc () from /lib64/libc.so.6
#4 0x0000003f9b074cde in malloc () from /lib64/libc.so.6
#5 0x0000003f9b07963b in strerror () from /lib64/libc.so.6
#6 0x0000003fa188032a in ERR_load_ERR_strings () from /lib64/libcrypto.so.6
#7 0x0000003fa187fde9 in ERR_load_crypto_strings () from /lib64/libcrypto.so.6
#8 0x0000003fa48309d9 in SSL_load_error_strings () from /lib64/libssl.so.6
#9 0x00002aaaba8e612e in Curl_ossl_init () from /opt/CSCOppm-unit/hypervisor/libcurl/lib/libcurl.so.4
#10 0x00002aaaba8ee6c1 in curl_global_init () from /opt/CSCOppm-unit/hypervisor/libcurl/lib/libcurl.so.4
#11 0x00002aaaba8ee6f8 in curl_easy_init () from /opt/CSCOppm-unit/hypervisor/libcurl/lib/libcurl.so.4
#12 0x00002aaaba0d932b in esxVI_SessionIsActive (ctx=0x2aaac093ca80, sessionID=0x2aaac06932a0 "`3i\300\252*", userName=0x2aaac0ae6e80 "root", output=0xffffffffffffffff) at esx/esx_vi_methods.generated.c:599
#13 0x00002aaaba0c7a60 in esxStorageVolumeLookupByKey (conn=0x7412, key=0x76c1 <Address 0x76c1 out of bounds>) at esx/esx_storage_driver.c:825
I checked that currently ESXi driver didn't initialize openssl. Because libcurl will not handle openssl for multi-thread. According to openssl API, libvirt should
register two methods to support mutli-threads. The detailed description is as following:
http://www.openssl.org/docs/crypto/threads.html
I have changed code as following:
1. virInitialize() in libvirt.c
Old Code:
int
virInitialize(void)
{
...
virLogSetFromEnv();
virNetTLSInit();
...
}
New Code:
int
virInitialize(void)
{
...
virLogSetFromEnv();
virNetTLSInit();
virOpenSSLInit();
...
}
2. In virnetServer.c
New Code:
pthread_mutex_t *lock_cs;
long *lock_count;
void virOpenSSLLockCallback(int mode, int type, const char *file ATTRIBUTE_UNUSED, int line ATTRIBUTE_UNUSED) {
if (mode & CRYPTO_LOCK)
{
pthread_mutex_lock(&(lock_cs[type]));
lock_count[type]++;
}
else
{
pthread_mutex_unlock(&(lock_cs[type]));
}
}
unsigned long virOpenSSLIdCallback(void)
{
unsigned long ret;
ret=(unsigned long)pthread_self();
return(ret);
}
void virOpenSSLInit(void)
{
int i;
lock_cs=OPENSSL_malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
lock_count=OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long));
for (i=0; i<CRYPTO_num_locks(); i++)
{
lock_count[i]=0;
pthread_mutex_init(&(lock_cs[i]),NULL);
}
CRYPTO_set_id_callback(virOpenSSLIdCallback);
CRYPTO_set_locking_callback(virOpenSSLLockCallback);
}
To be honest, virOpenSSLInit/ virOpenSSLIdCallback/ virOpenSSLLockCallback should not be defined in this file. But It seems that Makefile generated by autoconfig can't
handle the new file recursively.
What about this solution? If you have any comments, please feel free to contact me.
BTW: If I add a new source/header file, is there a simple way to change Makefile?
B.R.
Benjamin Wang
12 years, 2 months
[libvirt] [PATCH 0/7] Add support for lock failure action
by Jiri Denemark
When sanlock is used as a locking driver and sanlock deamon loses access to its
lockspace, it automatically kills off the domains that had their locks stored
there. Apparently some management apps would like to change this behavior by
configuring what should happen when locks are lost.
Everything except the sanlock_helper code from patch 7/7 should be stable. The
helper code may need some additional work (perhaps even touching other parts of
libvirtd internals) because some lock failure action does not work as expected.
For example, when automatic disk locks are enabled, the "pause" action will
result in libvirtd calling back to sanlock and since it doesn't have access to
the lockspace, the call would just hang. However, since currently the only
requestor for this feature is VDSM and it doesn't use automatic disk locks, the
sanlock_helper could work for them without any modifications. And since current
sanlock_helper implementation is supposed to be changed when libvirtd gains
administrative interface (see patch 7/7 for more details) we may even just live
with its limitations for the time being.
Jiri Denemark (7):
conf: Generalize life cycle actions to event actions
conf: Add on_lockfailure event configuration
qemu: Use macro instead of "qemu" in the context of URI scheme
locking: Add const char * parameter to avoid ugly typecasts
locking: Pass hypervisor driver name when acquiring locks
locking: Add support for lock failure action
locking: Implement lock failure action in sanlock driver
docs/formatdomain.html.in | 37 +++++--
docs/internals/locking.html.in | 8 ++
docs/schemas/domaincommon.rng | 30 +++++-
libvirt.spec.in | 1 +
src/Makefile.am | 13 ++-
src/conf/domain_conf.c | 85 +++++++++------
src/conf/domain_conf.h | 18 +++-
src/libvirt_private.syms | 2 +
src/locking/domain_lock.c | 36 ++++---
src/locking/domain_lock.h | 4 +
src/locking/lock_driver.h | 8 +-
src/locking/lock_driver_nop.c | 1 +
src/locking/lock_driver_sanlock.c | 114 +++++++++++++++++---
src/locking/lock_manager.c | 10 +-
src/locking/lock_manager.h | 1 +
src/locking/sanlock_helper.c | 214 ++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_conf.h | 2 +
src/qemu/qemu_driver.c | 21 ++--
src/qemu/qemu_hotplug.c | 15 ++-
src/qemu/qemu_process.c | 4 +-
20 files changed, 537 insertions(+), 87 deletions(-)
create mode 100644 src/locking/sanlock_helper.c
--
1.7.12
12 years, 2 months
[libvirt] [PATCH] python: keep consistent handling of Python integer conversion
by Guannan Ren
libvirt_ulonglongUnwrap requires the integer type of python obj.
But libvirt_longlongUnwrap still could handle python obj of
Pyfloat_type which causes the float value to be rounded up
to an integer.
For example
>>> dom.setSchedulerParameters({'vcpu_quota': 0.88})
0
libvirt_longlongUnwrap treats 0.88 as a valid value 0
However
>>> dom.setSchedulerParameters({'cpu_shares': 1000.22})
libvirt_ulonglongUnwrap will throw out an error
"TypeError: an integer is required"
The patch make this consistent.
---
python/typewrappers.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/python/typewrappers.c b/python/typewrappers.c
index 7580689..d633603 100644
--- a/python/typewrappers.c
+++ b/python/typewrappers.c
@@ -220,7 +220,7 @@ libvirt_ulongUnwrap(PyObject *obj, unsigned long *val)
int
libvirt_longlongUnwrap(PyObject *obj, long long *val)
{
- long long llong_val;
+ long long llong_val = -1;
if (!obj) {
PyErr_SetString(PyExc_TypeError, "unexpected type");
@@ -230,7 +230,11 @@ libvirt_longlongUnwrap(PyObject *obj, long long *val)
/* If obj is of PyInt_Type, PyLong_AsLongLong
* will call PyInt_AsLong() to handle it automatically.
*/
- llong_val = PyLong_AsLongLong(obj);
+ if (PyInt_Check(obj) || PyLong_Check(obj))
+ llong_val = PyLong_AsLongLong(obj);
+ else
+ PyErr_SetString(PyExc_TypeError, "an integer is required");
+
if ((llong_val == -1) && PyErr_Occurred())
return -1;
--
1.7.11.2
12 years, 2 months
[libvirt] [PATCH v3] esx: Support VLAN tags in virtual network port groups
by Matthias Bolte
---
v2: Use network level VLAN config if there is no portgroup specific VLAN
config given.
v3: Add ESX_VLAN_TRUNK define for magic number 4095
src/esx/esx_network_driver.c | 70 +++++++++++++++++++++++++++++++++++++++---
1 files changed, 65 insertions(+), 5 deletions(-)
diff --git a/src/esx/esx_network_driver.c b/src/esx/esx_network_driver.c
index 09d46d3..21eabbe 100644
--- a/src/esx/esx_network_driver.c
+++ b/src/esx/esx_network_driver.c
@@ -45,6 +45,9 @@
*/
verify(MD5_DIGEST_SIZE == VIR_UUID_BUFLEN);
+/* ESX utilizes the VLAN ID of 4095 to mean that this port is in trunk mode */
+#define ESX_VLAN_TRUNK 4095
+
static virDrvOpenStatus
@@ -489,7 +492,42 @@ esxNetworkDefineXML(virConnectPtr conn, const char *xml)
goto cleanup;
}
- hostPortGroupSpec->vlanId->value = 0;
+ if (def->portGroups[i].vlan.trunk) {
+ /* FIXME: Change this once tag-less trunk-mode is supported */
+ if (def->portGroups[i].vlan.nTags != 1 ||
+ *def->portGroups[i].vlan.tag != ESX_VLAN_TRUNK) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("VLAN tag has to be %d in trunk mode"),
+ ESX_VLAN_TRUNK);
+ goto cleanup;
+ }
+
+ hostPortGroupSpec->vlanId->value = ESX_VLAN_TRUNK;
+ } else if (def->portGroups[i].vlan.nTags == 1) {
+ hostPortGroupSpec->vlanId->value = *def->portGroups[i].vlan.tag;
+ } else if (def->portGroups[i].vlan.nTags > 1) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Can apply one VLAN tag per port group only"));
+ goto cleanup;
+ } else if (def->vlan.trunk) {
+ /* FIXME: Change this once tag-less trunk-mode is supported */
+ if (def->vlan.nTags != 1 || *def->vlan.tag != ESX_VLAN_TRUNK) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("VLAN tag has to be %d in trunk mode"),
+ ESX_VLAN_TRUNK);
+ goto cleanup;
+ }
+
+ hostPortGroupSpec->vlanId->value = ESX_VLAN_TRUNK;
+ } else if (def->vlan.nTags == 1) {
+ hostPortGroupSpec->vlanId->value = *def->vlan.tag;
+ } else if (def->vlan.nTags > 1) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Can apply one VLAN tag per port group only"));
+ goto cleanup;
+ } else {
+ hostPortGroupSpec->vlanId->value = 0;
+ }
if (def->portGroups[i].bandwidth != NULL) {
if (esxBandwidthToShapingPolicy
@@ -519,6 +557,8 @@ esxNetworkDefineXML(virConnectPtr conn, const char *xml)
network = virGetNetwork(conn, hostVirtualSwitch->name, md5);
cleanup:
+ /* FIXME: need to remove virtual switch if adding port groups failed */
+
virNetworkDefFree(def);
esxVI_HostVirtualSwitch_Free(&hostVirtualSwitch);
esxVI_HostPortGroup_Free(&hostPortGroupList);
@@ -695,6 +735,7 @@ esxNetworkGetXMLDesc(virNetworkPtr network_, unsigned int flags)
esxVI_String *hostPortGroupKey = NULL;
esxVI_String *networkName = NULL;
virNetworkDefPtr def;
+ virPortGroupDefPtr portGroup;
if (esxVI_EnsureSession(priv->primary) < 0) {
return NULL;
@@ -824,9 +865,12 @@ esxNetworkGetXMLDesc(virNetworkPtr network_, unsigned int flags)
for (networkName = networkNameList; networkName != NULL;
networkName = networkName->_next) {
if (STREQ(networkName->value, hostPortGroup->spec->name)) {
- def->portGroups[def->nPortGroups].name = strdup(networkName->value);
+ portGroup = &def->portGroups[def->nPortGroups];
+ ++def->nPortGroups;
+
+ portGroup->name = strdup(networkName->value);
- if (def->portGroups[def->nPortGroups].name == NULL) {
+ if (portGroup->name == NULL) {
virReportOOMError();
goto cleanup;
}
@@ -834,13 +878,29 @@ esxNetworkGetXMLDesc(virNetworkPtr network_, unsigned int flags)
if (hostPortGroup->spec->policy != NULL) {
if (esxShapingPolicyToBandwidth
(hostPortGroup->spec->policy->shapingPolicy,
- &def->portGroups[def->nPortGroups].bandwidth) < 0) {
+ &portGroup->bandwidth) < 0) {
++def->nPortGroups;
goto cleanup;
}
}
- ++def->nPortGroups;
+ if (hostPortGroup->spec->vlanId->value > 0) {
+ if (hostPortGroup->spec->vlanId->value == ESX_VLAN_TRUNK) {
+ portGroup->vlan.trunk = true;
+ }
+
+ /* FIXME: Remove this once tag-less trunk-mode is supported */
+ portGroup->vlan.nTags = 1;
+
+ if (VIR_ALLOC_N(portGroup->vlan.tag, 1) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ *portGroup->vlan.tag =
+ hostPortGroup->spec->vlanId->value;
+ }
+
break;
}
}
--
1.7.4.1
12 years, 2 months
[libvirt] Two core dumps are generated in multi-thread scenarios
by Benjamin Wang (gendwang)
Hi,
I found two core dumps generated in multi-thread scenarios in ESX part.
Case1: libcurl support multi-thread
core dump:
#12 0x00002aaabea89712 in addbyter () from /usr/local/lib/libcurl.so.4
#13 0x00002aaabea89b86 in dprintf_formatf () from /usr/local/lib/libcurl.so.4
#14 0x00002aaabea8b055 in curl_mvsnprintf () from /usr/local/lib/libcurl.so.4
#15 0x00002aaabea7678f in Curl_failf () from /usr/local/lib/libcurl.so.4
#16 0x00002aaabea6d871 in Curl_resolv_timeout () from /usr/local/lib/libcurl.so.4
#17 0x00000006e8a8f230 in ?? ()
Fix code:
esxVI_CURL_Connect() in esx_vi.c:
I add a new line as following:
curl_easy_setopt(curl->handle, CURLOPT_NOSIGNAL, 1);
Case2: libssl support multi-thread
core dump:
#0 0x0000003f9b030265 in raise () from /lib64/libc.so.6
#1 0x0000003f9b031d10 in abort () from /lib64/libc.so.6
#2 0x0000003f9b06a84b in __libc_message () from /lib64/libc.so.6
#3 0x0000003f9b072fae in _int_malloc () from /lib64/libc.so.6
#4 0x0000003f9b074cde in malloc () from /lib64/libc.so.6
#5 0x0000003f9b07963b in strerror () from /lib64/libc.so.6
#6 0x0000003fa188032a in ERR_load_ERR_strings () from /lib64/libcrypto.so.6
#7 0x0000003fa187fde9 in ERR_load_crypto_strings () from /lib64/libcrypto.so.6
#8 0x0000003fa48309d9 in SSL_load_error_strings () from /lib64/libssl.so.6
#9 0x00002aaaba8e612e in Curl_ossl_init () from /opt/CSCOppm-unit/hypervisor/libcurl/lib/libcurl.so.4
#10 0x00002aaaba8ee6c1 in curl_global_init () from /opt/CSCOppm-unit/hypervisor/libcurl/lib/libcurl.so.4
#11 0x00002aaaba8ee6f8 in curl_easy_init () from /opt/CSCOppm-unit/hypervisor/libcurl/lib/libcurl.so.4
#12 0x00002aaaba0d932b in esxVI_RegisterVM_Task (ctx=0x2aaaba0d96d1, _this=0x5cf54b20, path=0x50e921c0 "10.74.125.50", name=0x2aaac0ae6e80 "root", asTemplate=3228119712, pool=0x5cf54b20, host=0x2aaac0693270, output=0x50e921a0)
at esx/esx_vi_methods.generated.c:480
Possible Problem:
Two callback functions(locking_function and threadid_func) need to be set.
http://www.openssl.org/docs/crypto/threads.html#DESCRIPTION
Would you help to give some comments about this two core dump?
B.R.
Benjamin Wang
12 years, 2 months
[libvirt] [PATCH] esx: Disable libcurl's use of signals to fix a segfault
by Matthias Bolte
libcurl uses a SIGALRM in combination with sigsetjmp/siglongjmp to be
able to abort a DNS lookup when it takes too long. The problem with this
in a multi-threaded application is that the signal handler for SIGALRM
and the call to siglongjmp can be executed on a thread that is different
from the one that initially did the SIGALRM setup and the call to
sigsetjmp. In the reported case this triggered a segfault.
Disable libcurl's use of signals to avoid this situation. This has the
disadvantage of losing the ability to abort DNS lookups which might result
in libcurl getting stuck in a DNS lookup in the worst case.
Reported by Benjamin Wang.
---
src/esx/esx_vi.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/src/esx/esx_vi.c b/src/esx/esx_vi.c
index 275b858..125eaee 100644
--- a/src/esx/esx_vi.c
+++ b/src/esx/esx_vi.c
@@ -330,6 +330,7 @@ esxVI_CURL_Connect(esxVI_CURL *curl, esxUtil_ParsedUri *parsedUri)
}
curl_easy_setopt(curl->handle, CURLOPT_USERAGENT, "libvirt-esx");
+ curl_easy_setopt(curl->handle, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl->handle, CURLOPT_HEADER, 0);
curl_easy_setopt(curl->handle, CURLOPT_FOLLOWLOCATION, 0);
curl_easy_setopt(curl->handle, CURLOPT_SSL_VERIFYPEER,
--
1.7.4.1
12 years, 2 months
