August 2012 - Devel - libvirt List Archives

[libvirt] [libvirt-glib PATCHv3] Fix *_new_from_xml
by Christophe Fergeau 26 Sep '12

26 Sep '12

For objects with a subtype 'type' attribute, when the _new_from_xml function was called, the 'type' attribute was forcefully set to the right value rather than checking that the passed-in value matches the type of the subclass we are trying to instantiate. This commit changes this, and returns NULL when the value of the 'type' attribute of the passed-in XML document does not match the expected type. --- libvirt-gconfig/libvirt-gconfig-domain-address-pci.c | 5 ++++- libvirt-gconfig/libvirt-gconfig-domain-address-usb.c | 5 ++++- libvirt-gconfig/libvirt-gconfig-domain-chardev-source-pty.c | 5 ++++- libvirt-gconfig/libvirt-gconfig-domain-chardev-source-spicevmc.c | 5 ++++- libvirt-gconfig/libvirt-gconfig-domain-controller-usb.c | 5 ++++- libvirt-gconfig/libvirt-gconfig-domain-graphics-sdl.c | 5 +++-- libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c | 5 +++-- libvirt-gconfig/libvirt-gconfig-domain-graphics-vnc.c | 5 +++-- libvirt-gconfig/libvirt-gconfig-domain-interface-bridge.c | 5 +++-- libvirt-gconfig/libvirt-gconfig-domain-interface-network.c | 5 +++-- libvirt-gconfig/libvirt-gconfig-domain-interface-user.c | 5 +++-- libvirt-gconfig/libvirt-gconfig-domain-timer-pit.c | 5 ++++- libvirt-gconfig/libvirt-gconfig-domain-timer-rtc.c | 5 ++++- 13 files changed, 46 insertions(+), 19 deletions(-) diff --git a/libvirt-gconfig/libvirt-gconfig-domain-address-pci.c b/libvirt-gconfig/libvirt-gconfig-domain-address-pci.c index 48e3872..9ad7765 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-address-pci.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-address-pci.c @@ -67,7 +67,10 @@ GVirConfigDomainAddressPci *gvir_config_domain_address_pci_new_from_xml(const gc object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_ADDRESS_PCI, "address", NULL, xml, error); - gvir_config_object_set_attribute(object, "type", "pci", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "pci") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_ADDRESS_PCI(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-address-usb.c b/libvirt-gconfig/libvirt-gconfig-domain-address-usb.c index 3da5811..cb7a986 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-address-usb.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-address-usb.c @@ -67,7 +67,10 @@ GVirConfigDomainAddressUsb *gvir_config_domain_address_usb_new_from_xml(const gc object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_ADDRESS_USB, "address", NULL, xml, error); - gvir_config_object_set_attribute(object, "type", "usb", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "usb") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_ADDRESS_USB(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-pty.c b/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-pty.c index 201e123..8b14330 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-pty.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-pty.c @@ -75,7 +75,10 @@ GVirConfigDomainChardevSourcePty *gvir_config_domain_chardev_source_pty_new_from */ object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_CHARDEV_SOURCE_PTY, "dummy", NULL, xml, error); - gvir_config_object_set_attribute(object, "type", "pty", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "pty") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_CHARDEV_SOURCE_PTY(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-spicevmc.c b/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-spicevmc.c index 22eabf5..10c0ab8 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-spicevmc.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-chardev-source-spicevmc.c @@ -75,6 +75,9 @@ GVirConfigDomainChardevSourceSpiceVmc *gvir_config_domain_chardev_source_spicevm */ object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_CHARDEV_SOURCE_SPICE_VMC, "dummy", NULL, xml, error); - gvir_config_object_set_attribute(object, "type", "spicevmc", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "spicevmc") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_CHARDEV_SOURCE_SPICE_VMC(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-controller-usb.c b/libvirt-gconfig/libvirt-gconfig-domain-controller-usb.c index 1fd248c..d7d7f65 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-controller-usb.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-controller-usb.c @@ -167,7 +167,10 @@ GVirConfigDomainControllerUsb *gvir_config_domain_controller_usb_new_from_xml(co object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_CONTROLLER_USB, "controller", NULL, xml, error); - gvir_config_object_set_attribute(object, "type", "usb", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "usb") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_CONTROLLER_USB(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-graphics-sdl.c b/libvirt-gconfig/libvirt-gconfig-domain-graphics-sdl.c index 7871ae5..8b22ad0 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-graphics-sdl.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-graphics-sdl.c @@ -68,9 +68,10 @@ gvir_config_domain_graphics_sdl_new_from_xml(const gchar *xml, object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_GRAPHICS_SDL, "graphics", NULL, xml, error); - if (object == NULL) + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "sdl") != 0) { + g_object_unref(G_OBJECT(object)); return NULL; - gvir_config_object_set_attribute(object, "type", "sdl", NULL); + } return GVIR_CONFIG_DOMAIN_GRAPHICS_SDL(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c b/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c index e60a778..61d3f5b 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-graphics-spice.c @@ -68,9 +68,10 @@ gvir_config_domain_graphics_spice_new_from_xml(const gchar *xml, object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_GRAPHICS_SPICE, "graphics", NULL, xml, error); - if (object == NULL) + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "spice") != 0) { + g_object_unref(G_OBJECT(object)); return NULL; - gvir_config_object_set_attribute(object, "type", "spice", NULL); + } return GVIR_CONFIG_DOMAIN_GRAPHICS_SPICE(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-graphics-vnc.c b/libvirt-gconfig/libvirt-gconfig-domain-graphics-vnc.c index d9d1303..f2fc9d5 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-graphics-vnc.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-graphics-vnc.c @@ -68,9 +68,10 @@ gvir_config_domain_graphics_vnc_new_from_xml(const gchar *xml, object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_GRAPHICS_VNC, "graphics", NULL, xml, error); - if (object == NULL) + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "vnc") != 0) { + g_object_unref(G_OBJECT(object)); return NULL; - gvir_config_object_set_attribute(object, "type", "vnc", NULL); + } return GVIR_CONFIG_DOMAIN_GRAPHICS_VNC(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-interface-bridge.c b/libvirt-gconfig/libvirt-gconfig-domain-interface-bridge.c index ea5eafa..09a7efc 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-interface-bridge.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-interface-bridge.c @@ -70,9 +70,10 @@ GVirConfigDomainInterfaceBridge *gvir_config_domain_interface_bridge_new_from_xm object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_INTERFACE_BRIDGE, "interface", NULL, xml, error); - if (object == NULL) + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "bridge") != 0) { + g_object_unref(G_OBJECT(object)); return NULL; - gvir_config_object_set_attribute(object, "type", "bridge", NULL); + } return GVIR_CONFIG_DOMAIN_INTERFACE_BRIDGE(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-interface-network.c b/libvirt-gconfig/libvirt-gconfig-domain-interface-network.c index 1a7bfad..ce39234 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-interface-network.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-interface-network.c @@ -69,9 +69,10 @@ GVirConfigDomainInterfaceNetwork *gvir_config_domain_interface_network_new_from_ object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_INTERFACE_NETWORK, "interface", NULL, xml, error); - if (object == NULL) + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "network") != 0) { + g_object_unref(G_OBJECT(object)); return NULL; - gvir_config_object_set_attribute(object, "type", "network", NULL); + } return GVIR_CONFIG_DOMAIN_INTERFACE_NETWORK(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-interface-user.c b/libvirt-gconfig/libvirt-gconfig-domain-interface-user.c index a455a73..4ede31f 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-interface-user.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-interface-user.c @@ -69,8 +69,9 @@ GVirConfigDomainInterfaceUser *gvir_config_domain_interface_user_new_from_xml(co object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_INTERFACE_USER, "interface", NULL, xml, error); - if (object == NULL) + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "user") != 0) { + g_object_unref(G_OBJECT(object)); return NULL; - gvir_config_object_set_attribute(object, "type", "user", NULL); + } return GVIR_CONFIG_DOMAIN_INTERFACE_USER(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.c b/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.c index d75cd30..d5e57f1 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-timer-pit.c @@ -67,6 +67,9 @@ GVirConfigDomainTimerPit *gvir_config_domain_timer_pit_new_from_xml(const gchar object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_TIMER_PIT, "timer", NULL, xml, error); - gvir_config_object_set_attribute(object, "name", "pit", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "pit") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_TIMER_PIT(object); } diff --git a/libvirt-gconfig/libvirt-gconfig-domain-timer-rtc.c b/libvirt-gconfig/libvirt-gconfig-domain-timer-rtc.c index b99c1e3..64b7f80 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain-timer-rtc.c +++ b/libvirt-gconfig/libvirt-gconfig-domain-timer-rtc.c @@ -67,6 +67,9 @@ GVirConfigDomainTimerRtc *gvir_config_domain_timer_rtc_new_from_xml(const gchar object = gvir_config_object_new_from_xml(GVIR_CONFIG_TYPE_DOMAIN_TIMER_RTC, "timer", NULL, xml, error); - gvir_config_object_set_attribute(object, "name", "rtc", NULL); + if (g_strcmp0(gvir_config_object_get_attribute(object, NULL, "type"), "rtc") != 0) { + g_object_unref(G_OBJECT(object)); + g_return_val_if_reached(NULL); + } return GVIR_CONFIG_DOMAIN_TIMER_RTC(object); } -- 1.7.10.4

2 3

Re: [libvirt] [PATCH] block: Set cdrom device read only flag
by Kevin Shanahan 20 Sep '12

20 Sep '12

On Thu, Aug 02, 2012 at 11:46:13AM +0930, Kevin Shanahan wrote: > On Thu, Aug 02, 2012 at 11:02:42AM +0930, Kevin Shanahan wrote: > > Set the block driver read_only flag for cdrom devices so that > > qmp_change_blockdev does not attempt to open cdrom files in read-write > > mode when changing media. > > Hrm, this fixes my simple test case using the kvm monitor directly but > changing media via libvirt still has the same issue (fails for RO > files, succeeds for writable files). > > $ virsh attach-disk --type cdrom --mode readonly test1 /srv/kvm/iso/ubuntu-12.04-server-amd64.iso hdc > error: Failed to attach disk > error: internal error unable to execute QEMU command 'change': Could not open '/srv/kvm/iso/ubuntu-12.04-server-amd64.iso' > > I'll keep looking into it. In the libvirt case, it seems libvirt is failing to add media=cdrom to the commandline, so in this case qemu is defaulting to media=disk and my proposed fix has no effect. Diving into libvirt now to see why no media=disk is getting added... Common test case has this xml (generated by virt-install): <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> > Cheers, > Kevin.

4 11

[libvirt] [PATCH v4 0/5] Per-guest configurable user/group for QEMU processes
by Marcelo Cerri 14 Sep '12

14 Sep '12

This is a v4 patch series that updates the libvirt's security driver mechanism to support per-guest configurable user and group for QEMU processes running together with other security drivers, such as SELinux and AppArmor. Marcelo Cerri (5): Internal refactory of data structures Multiple security drivers in XML data Update security layer to handle many security labels Support for multiple default security drivers in QEMU config Update the remote API daemon/remote.c | 63 ++++ docs/formatdomain.html.in | 11 +- docs/schemas/capability.rng | 18 +- docs/schemas/domaincommon.rng | 30 ++- include/libvirt/libvirt.h.in | 2 + python/generator.py | 1 + src/conf/capabilities.c | 17 +- src/conf/capabilities.h | 6 +- src/conf/domain_audit.c | 14 +- src/conf/domain_conf.c | 343 +++++++++++++++----- src/conf/domain_conf.h | 20 +- src/driver.h | 4 + src/libvirt.c | 47 +++ src/libvirt_private.syms | 5 + src/libvirt_public.syms | 1 + src/lxc/lxc_conf.c | 8 +- src/lxc/lxc_controller.c | 8 +- src/lxc/lxc_driver.c | 11 +- src/lxc/lxc_process.c | 23 +- src/qemu/qemu.conf | 6 +- src/qemu/qemu_conf.c | 38 ++- src/qemu/qemu_conf.h | 2 +- src/qemu/qemu_driver.c | 218 +++++++++++--- src/qemu/qemu_process.c | 50 ++- src/remote/remote_driver.c | 46 +++ src/remote/remote_protocol.x | 17 +- src/remote_protocol-structs | 11 + src/security/security_apparmor.c | 118 +++++-- src/security/security_dac.c | 324 +++++++++++++++++-- src/security/security_manager.c | 101 +++++-- src/security/security_manager.h | 8 +- src/security/security_selinux.c | 263 +++++++++++----- src/security/security_stack.c | 237 +++++++++----- src/security/security_stack.h | 13 + src/test/test_driver.c | 11 +- .../qemuxml2argv-seclabel-dynamic-override.xml | 4 +- .../qemuxml2argv-seclabel-dynamic.xml | 2 +- 37 files changed, 1653 insertions(+), 448 deletions(-)

5 20

[libvirt] RFC: take two on live update of network configuration
by Laine Stump 11 Sep '12

11 Sep '12

We need a way to update the elements of a <network> without being required to restart the network before the changes take effect. I had previously thought I could just use a new virNetworkDefineXMLFlags with an optional flag set to mean "take effect immediately", but have been discouraged from that approach. Instead, I'm considering something similar to virDomain(Attach|Update|Detach)DeviceFlags, but this could be more complicated because I would like to be able to update *anything* within the network definition hierarchy, not just the direct subelements of one level in the hierarchy (as is the case for those existing functions). Here's an example of an existing network (note that this isn't a legal network - you can't have an <ip> element and an interface pool (or a bridge name and an interface pool) in the same network; this is just so I can use a single example), and some of the things we might want to do with it: <network> <name>test1</name> <uuid>2d39a0ba-ac4b-6097-114c-50f8bccc277c</uuid> <forward mode='bridge'/> <bridge name='virbr5' stp='on' delay='0' /> <mac address='52:54:00:38:81:4D'/> <domain name='example.com'/> <forward mode='private'/> <interface dev="eth20"/> <interface dev="eth21"/> <interface dev="eth22"/> <interface dev="eth23"/> <interface dev="eth24"/> </forward> <portgroup name='engineering' default='yes'> <virtualport type='802.1Qbh'> <parameters profileid='test'/> </virtualport> <bandwidth> <inbound average='1000' peak='5000' burst='5120'/> <outbound average='1000' peak='5000' burst='5120'/> </bandwidth> </portgroup> <portgroup name='sales'> <virtualport type='802.1Qbh'> <parameters profileid='salestest'/> </virtualport> <bandwidth> <inbound average='500' peak='2000' burst='2560'/> <outbound average='128' peak='256' burst='256'/> </bandwidth> </portgroup> <dns> <txt name="example" value="example value" /> <srv service='name' protocol='tcp' domain='test-domain-name' target='.' port='1024' priority='10' weight='10'/> <host ip='192.168.122.2'> <hostname>myhost</hostname> <hostname>myhostalias</hostname> </host> </dns> <ip address='10.24.75.1' netmask='255.255.255.0'> <dhcp> <range start='10.24.75.128' end='10.24.75.254' /> <host mac='52:54:3e:77:e2:ed' name='X.example.com' ip='10.24.75.10' /> <host mac='52:54:3e:77:e2:ef' name='Y.example.com' ip='10.24.75.11' /> <host mac='52:54:34:77:e2:f0' name='Z.example.com' ip='10.24.75.12' /> <host mac='52:54:3e:77:e2:f1' name='A.example.com' ip='10.24.75.13' /> </dhcp> </ip> <ip address='192.168.4.1' netmask='255.255.255.0'/> </network> Some things we might want to do to this (the first three have already been requested): 1) add or remove an interface from the interface pool, i.e. a particular <interface> sub-element of the (one and only) <forward> element. 2) add/remove/modify a portgroup entry (i.e. a specific sub-element of <network>) 3) add/remove/modify a static host entry from the <dhcp> section of a particular <ip> (so, a particular <host> sub-element of a particular <ip> element) Some others: 4) add/modify/remove a <host> (or a <txt> or an <srv> in the <dns> section 4) add/modify/remove the <domain> 5) add/modify/remove an entire <ip> element 6) turn stp on/off in the <bridge> element I can see three possible methods of providing this functionality: =========== OPTION 1) Have a single API: virNetworkUpdate(virNetworkPtr network, const char *xml, unsigned, int flags) This function would take an entire <network> specification as an arg, and replace the entire existing config. This would allow changing anything, but would also require reading the entire config beforehand. =========== OPTION 2) have a separate API for each different type of element we may want to change, e.g.: virNetworkUpdateForwardInterface(virNetworkPtr network, const char *xml, unsigned int flags); virNetworkUpdatePortgroup(virNetworkPtr network, const char *xml, unsigned int flags); virNetworkUpdateIpDhcpHost(virNetworkPtr network, const char *xml, unsigned int flags); virNetworkUpdateDnsEntry(virNetworkPtr network, const char *xml, unsigned int flags); /* The name of this one may confuse... */ virNetworkUpdateDomain(virNetworkPtr network, const char *xml, unsigned int flags); virNetworkUpdateBridge(virNetworkPtr network, const char *xml, unsigned int flags); virNetworkUpdateIpDnsHost(virNetworkPtr network, const char *xml, unsigned int flags); etc. (etc. etc.) "flags" would include: /* force add if object with matching key doesn't exist */ VIR_NETWORK_UPDATE_ADD /* delete existing object(s) that matches the xml */ VIR_NETWORK_UPDATE_DELETE /* take effect immediately */ VIR_NETWORK_UPDATE_LIVE /* persistent change */ VIR_NETWORK_UPDATE_CONFIG This method could be problematic, e.g., for something like virNetworkUpdateIpDhcpHost() - although currently only a single <ip> element can have a <dhcp> entries, in the future we could allow any/all of them to have dhcp entries. Another downside is that we would need to add an new function for each new element we decide we want to be able to update. =========== OPTION 3) Again, a single API, but with an added "nodespec" arg which would be used to describe the parent node you of the node you want added/updated to: int virNetworkUpdate(virNetworkPtr network, const char *nodeSpec, const char *xml, unsigned int flags); For example, if you wanted to add a new <host> entry to <ip address='10.24.75.1' ...>'s dhcp element, you would do this: /* nodespec obviously uses an XPath expression */ virNetworkUpdate("/ip[address='10.24.75.1']/dhcp", /* full text of <host> element to add */ "<host mac='00:16:3e:77:e2:ed' " "name='X.example.com' ip='10.24.75.10'/>" VIR_NETWORK_UPDATE_ADD | VIR_NETWORK_UPDATE_LIVE | VIR_NETWORK_UPDATE_CONFIG); Or, to change the contents of the exiting portgroup "engineering" you would use: virNetworkUpdate("/", /* full text of portgroup */, "<portgroup name='engineering'> ..... </portgroup>" VIR_NETWORK_UPDATE_LIVE|VIR_NETWORK_UPDATE_CONFIG); To delete a static dhcp host entry, you would use this: virNetworkUpdate("/ip[address='10.24.75.1']/dhcp", /* just enough to match existing entry */ "<host mac='00:16:3e:77:e2:ed'/>", VIR_NETWORK_UPDATE_DELETE | VIR_NETWORK_UPDATE_LIVE | VIR_NETWORK_UPDATE_CONFIG); or if you preferred: virNetworkUpdate("/ip[address='10.24.75.1']/dhcp", /* again, just enough to match */ "<host ip='10.24.75.10'/>", VIR_NETWORK_UPDATE_DELETE |VIR_NETWORK_UPDATE_LIVE | VIR_NETWORK_UPDATE_CONFIG); To remove an interface from the interface pool: virNetworkUpdate("/forward", "<interface dev='eth20'/>", VIR_NETWORK_UPDATE_DELETE | VIR_NETWORK_UPDATE_LIVE | VIR_NETWORK_UPDATE_CONFIG) (adding an interface would be identical, except the flag). (An alternate implementation would be to have nodeSpec specify the node that is being updated/removed rather than its parent. This may make more logical sense, (although not for ADD) and would even make the rest of the code simpler for update/remove (we wouldn't have to do a manual search within the node). The positive side of this is that the one API function allows you to modify *anything* (even stuff not yet invented, so it's future-proof). The negative side is that the code that implements it would need to go to quite a bit of extra trouble to determine what has been changed (basically, it would a) generate XML for the current state of the network, b) parse that into an xmlNode, c) perform the operation on xmlNode using nodeset to figure out where, and adding in the new xml (or removing any nodes matching it), d) convert modified xmlNode back to xml text, e) parse the xml text into a virNetworkDef, f) compare it to the original virNetworkDef to determine what to do. ========== Which OPTION? 1, 2, or 3? ========================= I'm discounting option (1) for now. Here's the scorecard for (2) vs. (3): 2) Pros: easier to understand, more exactly defined. Cons: requires a new API each time we find a different node we want to be able to update 3) Pros: one API covers everything, should never need any new API Cons: more complex for user to understand, me to implement. Possibly more trouble to do fine grained access control (e.g. if you want to allow adding dhcp static hosts, but not allow changing the domain name or interface pool) (actually, in practice, I guess it shouldn't be any more trouble to do fine grained access control, as long as you can make the decision of whether or not to allow later on in the function that implements the API (at step (6) above), rather than at the top level when the API is first called). I'm leaning towards (3). If it raises a technical boundary, or people don't like the idea of having an arg in the public API that takes an XPath expression, then maybe I could switch to (2). Any opinions on which direction I should take? Some way different from what I'm suggesting? Specific questions: 1) Does having a single public API that is used to update many different parts of the object raise any hurdles wrt. fine grained access control? (knowing that there will be "some point" in that code that we know exactly what the user is attempting to change). 2) any problems / reservations about accepting XPatch expressions in the args of a public API? 3) Can you think of a situation where this wouldn't work?

4 8

Re: [libvirt] [User question] Huge buffer size on KVM host
by Avi Kivity 10 Sep '12

10 Sep '12

On 08/16/2012 05:54 PM, Martin Wawro wrote: > > On Aug 15, 2012, at 2:57 PM, Avi Kivity wrote: > >>> >>> We are using logical volumes and the cache is set to 'none'. >> >> Strange, that should work without any buffering. >> >> What the contents of >> >> /sys/block/sda/queue/hw_sector_size >> >> and >> >> /sys/block/sda/queue/logical_block_size >> >> ? >> > > Hi Avi, > > It seems that the kernel on that particular machine is too old, those entries are > not featured. We checked on a comparable setup with a newer kernel and both entries > were set to 512. > > We also did have a third more thorough look on the caching. It turns out that the > virt-manager does not seem to honor the caching adjusted in the GUI correctly. > We disabled caching on all virtual devices for this particular VM and checking > with "ps -fxal" revealed, that only one of those devices (and a rather small one too) > had this set. We corrected this in the XML file directly and the buffer size > currently resides at around 1.8 GB after rebooting the VM (the only virtio device > not having the cache=none option set is now the (non-mounted) cdrom). > cc += libvirt-list Is there a reason that cdroms don't get cache=none? -- error compiling committee.c: too many arguments to function

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[libvirt] [PATCHv6 0/2] Implementation of virConnectListAllDomains() for esx and hyperv
by Peter Krempa 09 Sep '12

09 Sep '12

Yet another respin updated and rebased to current head. Both drivers are compile tested but I don't have the infrastructure do a functional test. Peter Krempa (2): hyperv: Add implementation for virConnectListAllDomains() esx: Add implementation for virConnectListAllDomains() src/esx/esx_driver.c | 194 +++++++++++++++++++++++++++++++++++++++++++++ src/hyperv/hyperv_driver.c | 135 +++++++++++++++++++++++++++++++ 2 files changed, 329 insertions(+) -- 1.7.12

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[libvirt] [PATCH V3] Add proxy FS support to libvirt
by M. Mohan Kumar 07 Sep '12

07 Sep '12

From: "M. Mohan Kumar" <mohan(a)in.ibm.com> A new FS driver type 'proxy' is added to QEMU 9p server. This patch adds support for using proxy FS driver from libvirt. QEMU proxy FS driver uses socket for communicating between helper and qemu proxy FS driver. Proxy helper (a stand alone binary part of qemu) is invoked with one of the descriptors created using socketpair call and the share path. Similarly QEMU is invoked with another descriptor created using the same socketpair system call and with other required FS driver parameters. Need for proxy FS driver ======================== Pass through security model in QEMU 9p server has following issues: 1) TOCTTOU vulnerability: Following symbolic links in the server could provide access to files beyond 9p export path. 2) Running QEMU with root privilege could be a security issue (pass through security model needs root privilege). Proxy FS driver is implemented to solve these issues. Proxy FS uses chroot + socket combination for securing the vulnerability known with following symbolic links. Intention of adding a new filesystem type is to allow qemu to run in non-root mode, but doing privileged operations in a chroot environment using socket IO. Proxy helper is invoked with root privileges and chroots into 9p export path. QEMU proxy fs driver sends filesystem request to proxy helper and receives the response from it. Proxy helper is designed such a way that it needs only few capabilities related to filesystem operations (such as CAP_DAC_OVERRIDE, CAP_FOWNER, etc) and all other capabilities are dropped (CAP_SYS_CHROOT, etc) Proxy patches http://permalink.gmane.org/gmane.comp.emulators.qemu/128735 Signed-off-by: M. Mohan Kumar <mohan(a)in.ibm.com> --- Changes from previous version V3 * Addressed Daniel's review comments Changes from previous version V2 * Rebased on top of current libvirt git level Changes from previous version * Remove the xml node for specifying the virtfs-proxy-helper path, now it is determined from qemu binary path. docs/formatdomain.html.in | 2 + src/conf/domain_conf.c | 3 +- src/conf/domain_conf.h | 2 +- src/qemu/qemu_capabilities.c | 5 ++- src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_command.c | 83 ++++++++++++++++++++++++++++++++++++++++-- src/qemu/qemu_command.h | 3 +- tests/qemuhelptest.c | 7 +++- 8 files changed, 96 insertions(+), 10 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 2c5c456..bf74ed8 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1621,6 +1621,8 @@ while the value <code>immediate</code> means that a host writeback is immediately triggered for all pages touched during a guest file write operation (since 0.9.10). + or <code>type='proxy'</code> (since + 1.0). </dd> <dt><code>type='template'</code></dt> <dd> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 851284a..79ca2b7 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -268,7 +268,8 @@ VIR_ENUM_IMPL(virDomainFS, VIR_DOMAIN_FS_TYPE_LAST, VIR_ENUM_IMPL(virDomainFSDriverType, VIR_DOMAIN_FS_DRIVER_TYPE_LAST, "default", "path", - "handle") + "handle", + "proxy") VIR_ENUM_IMPL(virDomainFSAccessMode, VIR_DOMAIN_FS_ACCESSMODE_LAST, "passthrough", diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index fd0e89e..a296f49 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -660,6 +660,7 @@ enum virDomainFSDriverType { VIR_DOMAIN_FS_DRIVER_TYPE_DEFAULT = 0, VIR_DOMAIN_FS_DRIVER_TYPE_PATH, VIR_DOMAIN_FS_DRIVER_TYPE_HANDLE, + VIR_DOMAIN_FS_DRIVER_TYPE_PROXY, VIR_DOMAIN_FS_DRIVER_TYPE_LAST }; @@ -698,7 +699,6 @@ struct _virDomainFSDef { unsigned long long space_soft_limit; /* in bytes */ }; - /* 5 different types of networking config */ enum virDomainNetType { VIR_DOMAIN_NET_TYPE_USER, diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 5472267..88b7e87 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -144,7 +144,6 @@ VIR_ENUM_IMPL(qemuCaps, QEMU_CAPS_LAST, "ich9-ahci", "no-acpi", "fsdev-readonly", - "virtio-blk-pci.scsi", /* 80 */ "blk-sg-io", "drive-copy-on-read", @@ -172,7 +171,7 @@ VIR_ENUM_IMPL(qemuCaps, QEMU_CAPS_LAST, "bridge", /* 100 */ "lsi", "virtio-scsi-pci", - + "fsdev-proxy", ); struct qemu_feature_flags { @@ -1133,6 +1132,8 @@ qemuCapsComputeCmdFlags(const char *help, qemuCapsSet(flags, QEMU_CAPS_FSDEV_READONLY); if (strstr(fsdev, "writeout")) qemuCapsSet(flags, QEMU_CAPS_FSDEV_WRITEOUT); + if (strstr(fsdev, "sock_fd")) + qemuCapsSet(flags, QEMU_CAPS_FSDEV_PROXY); } if (strstr(help, "-smbios type")) qemuCapsSet(flags, QEMU_CAPS_SMBIOS_TYPE); diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index d606890..073a1cd 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -138,6 +138,7 @@ enum qemuCapsFlags { QEMU_CAPS_NETDEV_BRIDGE = 100, /* bridge helper support */ QEMU_CAPS_SCSI_LSI = 101, /* -device lsi */ QEMU_CAPS_VIRTIO_SCSI_PCI = 102, /* -device virtio-scsi-pci */ + QEMU_CAPS_FSDEV_PROXY = 103, /* -fsdev proxy supported */ QEMU_CAPS_LAST, /* this must always be the last item */ }; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 4ca3047..3f78635 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -46,6 +46,7 @@ #include <sys/utsname.h> #include <sys/stat.h> #include <fcntl.h> +#include <libgen.h> #define VIR_FROM_THIS VIR_FROM_QEMU @@ -116,7 +117,8 @@ VIR_ENUM_DECL(qemuDomainFSDriver) VIR_ENUM_IMPL(qemuDomainFSDriver, VIR_DOMAIN_FS_DRIVER_TYPE_LAST, "local", "local", - "handle"); + "handle", + "proxy"); static void @@ -2632,9 +2634,59 @@ error: return NULL; } +/* + * Invokes the Proxy Helper with one of the socketpair as its parameter + * + */ +static int qemuInvokeProxyHelper(const char *emulator, int sock, const char *path) +{ +#define HELPER "virtfs-proxy-helper" + int ret_val, status; + virCommandPtr cmd; + char *helper, *dname, *dp; + + dp = strdup(emulator); + if (!dp) { + virReportOOMError(); + return -1; + } + dname = strrchr(dp, '/'); + if (!dname) { + VIR_FREE(dp); + VIR_FORCE_CLOSE(sock); + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Unable to get path details from %s"), dp); + return -1; + } + *dname = '\0'; + if (virAsprintf(&helper, "%s/%s", dp, HELPER) < 0) { + VIR_FREE(dp); + VIR_FORCE_CLOSE(sock); + virReportOOMError(); + return -1; + } + + cmd = virCommandNewArgList(helper, NULL); + virCommandAddArg(cmd, "-f"); + virCommandAddArgFormat(cmd, "%d", sock); + virCommandAddArg(cmd, "-p"); + virCommandAddArgFormat(cmd, "%s", path); + virCommandTransferFD(cmd, sock); + virCommandDaemonize(cmd); + ret_val = virCommandRun(cmd, &status); + if (ret_val < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("%s can't execute"), helper); + VIR_FORCE_CLOSE(sock); + } + virCommandFree(cmd); + VIR_FREE(helper); + VIR_FREE(dp); + return ret_val; +} char *qemuBuildFSStr(virDomainFSDefPtr fs, - virBitmapPtr qemuCaps ATTRIBUTE_UNUSED) + virBitmapPtr qemuCaps ATTRIBUTE_UNUSED, int qemuSocket) { virBuffer opt = VIR_BUFFER_INITIALIZER; const char *driver = qemuDomainFSDriverTypeToString(fs->fsdriver); @@ -2683,6 +2735,10 @@ char *qemuBuildFSStr(virDomainFSDefPtr fs, } virBufferAsprintf(&opt, ",id=%s%s", QEMU_FSDEV_HOST_PREFIX, fs->info.alias); + + if (fs->fsdriver == VIR_DOMAIN_FS_DRIVER_TYPE_PROXY) + virBufferAsprintf(&opt, ",sock_fd=%d", qemuSocket); + virBufferAsprintf(&opt, ",path=%s", fs->src); if (fs->readonly) { @@ -5153,10 +5209,31 @@ qemuBuildCommandLine(virConnectPtr conn, if (qemuCapsGet(qemuCaps, QEMU_CAPS_FSDEV)) { for (i = 0 ; i < def->nfss ; i++) { char *optstr; + int sockets[2] = {-1, -1}; virDomainFSDefPtr fs = def->fss[i]; + /* + * If its a proxy FS, we need to create a socket pair + * and invoke proxy_helper + */ + if (fs->fsdriver == VIR_DOMAIN_FS_DRIVER_TYPE_PROXY) { + if (qemuCapsGet(qemuCaps, QEMU_CAPS_FSDEV_PROXY) < 0) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("proxy helper not supported")); + goto error; + } + /* create a socket pair */ + if (socketpair(PF_UNIX, SOCK_STREAM, 0, sockets) < 0) { + virReportSystemError(errno, _("socketpair %s"), "failed"); + goto error; + } + virCommandTransferFD(cmd, sockets[1]); + if (qemuInvokeProxyHelper(def->emulator, sockets[0], + fs->src) < 0) + goto error; + } virCommandAddArg(cmd, "-fsdev"); - if (!(optstr = qemuBuildFSStr(fs, qemuCaps))) + if (!(optstr = qemuBuildFSStr(fs, qemuCaps, sockets[1]))) goto error; virCommandAddArg(cmd, optstr); VIR_FREE(optstr); diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index e999bc7..2da5ad0 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -89,7 +89,8 @@ char *qemuBuildDriveStr(virConnectPtr conn, bool bootable, virBitmapPtr qemuCaps); char *qemuBuildFSStr(virDomainFSDefPtr fs, - virBitmapPtr qemuCaps); + virBitmapPtr qemuCaps, + int qemuSocket); /* Current, best practice */ char * qemuBuildDriveDevStr(virDomainDefPtr def, diff --git a/tests/qemuhelptest.c b/tests/qemuhelptest.c index 2d15c94..6af2e68 100644 --- a/tests/qemuhelptest.c +++ b/tests/qemuhelptest.c @@ -679,7 +679,9 @@ mymain(void) QEMU_CAPS_SCSI_BLOCK, QEMU_CAPS_SCSI_CD, QEMU_CAPS_IDE_CD, - QEMU_CAPS_SCSI_LSI); + QEMU_CAPS_SCSI_LSI, + QEMU_CAPS_FSDEV_PROXY); + DO_TEST("qemu-1.1.0", 1001000, 0, 0, QEMU_CAPS_VNC_COLON, QEMU_CAPS_NO_REBOOT, @@ -759,7 +761,8 @@ mymain(void) QEMU_CAPS_NEC_USB_XHCI, QEMU_CAPS_NETDEV_BRIDGE, QEMU_CAPS_SCSI_LSI, - QEMU_CAPS_VIRTIO_SCSI_PCI); + QEMU_CAPS_VIRTIO_SCSI_PCI, + QEMU_CAPS_FSDEV_PROXY); return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE; } -- 1.7.7.6

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[libvirt] [RFC PATCH v1 0/2] Qemu/Gluster support in Libvirt
by Harsh Prateek Bora 07 Sep '12

07 Sep '12

This patchset provides support for Gluster protocol based network disks. It is based on the proposed gluster support in Qemu on qemu-devel: http://lists.gnu.org/archive/html/qemu-devel/2012-08/msg01539.html TODO: - Add support for IPv6 format based server addr - Support for transport types other than socket. Harsh Prateek Bora (2): Qemu/Gluster: Add Gluster protocol as supported network disk formats. tests: Add tests for gluster protocol based network disks support docs/schemas/domaincommon.rng | 8 ++ src/conf/domain_conf.c | 14 ++- src/conf/domain_conf.h | 3 +- src/qemu/qemu_command.c | 123 +++++++++++++++++++++ tests/qemuargv2xmltest.c | 1 + .../qemuxml2argv-disk-drive-network-gluster.args | 1 + .../qemuxml2argv-disk-drive-network-gluster.xml | 33 ++++++ tests/qemuxml2argvtest.c | 2 + 8 files changed, 182 insertions(+), 3 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-gluster.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-gluster.xml -- 1.7.11.2

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[libvirt] RFC: APIs to manage KSM
by Osier Yang 07 Sep '12

07 Sep '12

Triggered by the requirement to control the new sys knob /sys/kernel/mm/ksm/merge_nodes for a NUMA aware host by patch: http://permalink.gmane.org/gmane.linux.kernel.mm/81497 It shows there is no methods to manage the KSM in libvirt. This proposes the new APIs like following, thanks for suggestions/idea in advance. == The macros and enums for the params' fields /* virNodeKSMRunMode: * * Represents the modes of /sys/kernel/mm/ksm/run. */ typedef enum { /* Stop ksmd from running but keep merged pages */ VIR_NODE_STOP_KSM_KEEP_MERGED_PAGES = 0, /* Start ksmd */ VIR_NODE_START_KSM = 1, /* Stop ksmd and and unmerge all pages currently merged */ VIR_NODE_STOP_KSM_UNMERGE_PAGES = 2, } virNodeKSMRunMode; /* * VIR_NODE_KSM_PAGES_TO_SCAN: * * Macro for typed parameter that represents how many present pages * to scan before ksmd goes to sleep. */ # define VIR_NODE_KSM_PAGES_TO_SCAN "pages_to_scan" /* * VIR_NODE_KSM_SLEEP_MILLISECS: * * Macro for typed parameter that represents how many milliseconds * ksmd should sleep before next scan. */ # define VIR_NODE_KSM_SLEEP_MILLISECS "sleep_millisecs" /* * VIR_NODE_KSM_RUN: * * Macro for typed parameter that is used to control ksmd's state, as * an int containing a virNodeKSMRunMode value. */ # define VIR_NODE_KSM_RUN "run" /* * VIR_NODE_KSM_PAGES_SHARED: * * Macro for typed parameter that represents how many ksm shared pages * are being used. */ # define VIR_NODE_KSM_PAGES_SHARED "pages_shared" /* * VIR_NODE_KSM_PAGES_SHARING: * * Macro for typed parameter that represents how many sites are * sharing the pages i.e. how much saved. */ # define VIR_NODE_KSM_PAGES_SHARING "pages_sharing" /* VIR_NODE_KSM_PAGES_UNSHARED: * * Macro for typed parameter that represents how many pages unique * but repeatedly checked for merging. */ # define VIR_NODE_KSM_PAGES_UNSHARED "pages_unshared" /* VIR_NODE_KSM_PAGES_VOLATILE: * * Macro for typed parameter that represents how many pages changing * too fast to be placed in a tree. */ # define VIR_NODE_KSM_PAGES_VOLATILE "pages_volatile" /* VIR_NODE_KSM_FULL_SCAN: * * Macro for typed parameter that represents how many times all * mergeable areas have been scanned. */ # define VIR_NODE_KSM_FULL_SCAN "full_scan" == API to Get KSM parameters. /* * virNodeGetKSMParameters: * @conn: pointer to the hypervisor connection * @params: pointer to memory parameter object * (return value, allocated by the caller) * @nparams: pointer to number of memory parameters; input and output * @flags: extra flags; not used yet, so callers should always pass 0 * * ... Detailed comments ommitted ... * * Returns 0 in case of success, and -1 in case of failure. */ int virNodeGetKSMParameters(virConnectPtr conn, virTypedParameterPtr params, int *nparams, unsigned int flags); == API to set KSM parameters. Currently only "run", "pages_to_scan", and "sleep_millisecs" are writable. The new boolearn sys knob "merge_nodes" could be added once it's acceptted by kernel upstream. /* * virNodeSetKSMParameters: * @conn: pointer to the hypervisor connection * @params: pointer to scheduler parameter objects * @naprams: number of scheduler parameter objects * (this value can be the same or less than the returned * value nparams of virDomainGetSchedulerType) * @flags: extra flags; not used yet, so callers should always pass 0 * * ... Detailed comments ommitted ... * * Returns 0 in case of success, -1 in case of failure. */ int virNodeSetKSMParameters(virConnectPtr conn, virTypedParameterPtr params, int nparams, unsigned int flags); BTW, the other thing libvirt misses is to tell ksmtuned to retune when a domain is started or destroyed. Which is outlined in the Red Hat Virtualization Administration Guide doc, but it's not true. So either we have a hole in libvirt, or lacks a fix for the document. <...> The KSM tuning service The ksmtuned service does not have any options. The ksmtuned service loops and adjusts ksm. The ksmtuned service is notified by libvirt when a guest is created or destroyed. </...> https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/h… Regards, Osier

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[libvirt] [PATCH] Refactor ESX storage driver and add iSCSI support
by Ata E Husain Bohra 07 Sep '12

07 Sep '12

Resent of http://www.redhat.com/archives/libvir-list/2012-August/msg01353.html. Merging recent branch updates to this patch. Ata E Husain Bohra (1): Refactor ESX storage driver and add iSCSI support src/Makefile.am | 16 +- src/esx/esx_driver.c | 4 +- src/esx/esx_storage_backend_iscsi.c | 794 +++++++++++++++++++ src/esx/esx_storage_backend_iscsi.h | 31 + src/esx/esx_storage_backend_vmfs.c | 1471 +++++++++++++++++++++++++++++++++++ src/esx/esx_storage_backend_vmfs.h | 31 + src/esx/esx_storage_driver.c | 1303 +++++-------------------------- src/esx/esx_vi.c | 341 +++++++- src/esx/esx_vi.h | 21 +- src/esx/esx_vi_generator.input | 308 +++++++- src/esx/esx_vi_generator.py | 19 + 11 files changed, 3218 insertions(+), 1121 deletions(-) create mode 100644 src/esx/esx_storage_backend_iscsi.c create mode 100644 src/esx/esx_storage_backend_iscsi.h create mode 100644 src/esx/esx_storage_backend_vmfs.c create mode 100644 src/esx/esx_storage_backend_vmfs.h -- 1.7.9.5

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