If a directory pool contains pipes or sockets, a pool start can fail or hang:
https://bugzilla.redhat.com/show_bug.cgi?id=589577
We already try to avoid these special files, but only attempt after
opening the path, which is where the problems lie. Unify volume opening
into helper functions, which use the proper open() flags to avoid error,
followed by fstat to validate storage mode.
Previously, virStorageBackendUpdateVolTargetInfoFD attempted to enforce the
storage mode check, but allowed callers to detect this case and silently
continue. In practice, only the FS backend was using this feature, the rest
were treating unknown mode as an error condition. Unfortunately the InfoFD
function wasn't raising an error message here, so error reporting was
busted.
This patch adds 2 functions: virStorageBackendVolOpen, and
virStorageBackendVolOpenModeSkip. The latter retains the original opt out
semantics, the former now throws an explicit error.
This patch maintains the previous volume mode checks: allowing specific
modes for specific pool types requires a bit of surgery, since VolOpen
is called through several different helper functions.
v2: Use ATTRIBUTE_NONNULL. Drop stat check, just open with
O_NONBLOCK|O_NOCTTY.
v3: Move mode check logic back to VolOpen. Use 2 VolOpen functions with
different error semantics.
v4: Make second VolOpen function more extensible. Didn't opt to change
FS backend defaults, this can just be to fix the original bug.
v5: Prefix default flags with VIR_, use ATTRIBUTE_RETURN_CHECK
Since the macvtap device needs active tear-down and the teardown logic
is based on the interface name, it can happen that if for example 1 out
of 3 interfaces was successfully created, that during the failure path
the macvtap's target device name is used to tear down an interface that
is doesn't own (owned by another VM).
So, in this patch, the target interface name is reset so that there is
no target interface name and the interface name is always cleared after
a tear down.
* If a nodedev has a parent that we don't want to display, we should
continue walking up the udev device tree to see if any of its
earlier ancestors are devices that we display. It makes the tree
much nicer looking than having a whole lot of devices hanging off
the root node.
Firstly, the init script has to touch its file under /var/lock/subsys
when started, otherwise the system would think it's not running and
won't stop it during shutdown.
Secondly, for some reason there is a policy to automatically enable
init scripts when they are installed, so let the specfile do this. We
also need to start the init script to ensure it will be stopped during
the first shutdown after installing the package.
Also $LISTFILE should be enclosed by quotes everywhere as suggested by
Eric.
These files are borrowed from upstream release versions, and should
not need further edits in the context of libvirt (instead, a new
upstream vbox release would entail adding a new header file). We do
not re-generate these files as part of libvirt, nor do we want to lose
our minor edits (such as cppi cleanups).
* src/vbox/vbox_CAPI_v2_2.h: Clarify file origins.
* src/vbox/vbox_CAPI_v3_0.h: Likewise.
* src/vbox/vbox_CAPI_v3_1.h: Likewise.
* src/vbox/vbox_CAPI_v3_2.h: Likewise. Reindent with cppi.
Fedora bug https://bugzilla.redhat.com/show_bug.cgi?id=235961
If using the default virtual network, an easy way to lose guest network
connectivity is to install libvirt inside the VM. The autostarted
default network inside the guest collides with host virtual network
routing. This is a long standing issue that has caused users quite a
bit of pain and confusion.
On network startup, parse /proc/net/route and compare the requested
IP+netmask against host routing destinations: if any matches are found,
refuse to start the network.
v2: Drop sscanf, fix a comment typo, comment that function could use
libnl instead of /proc
v3: Consider route netmask. Compare binary data rather than convert to
string.
v4: Return to using sscanf, drop inet functions in favor of virSocket,
parsing safety checks. Don't make parse failures fatal, in case
expected format changes.
v5: Try and continue if we receive unexpected. Delimit parsed lines to
prevent scanning past newline
'listen' isn't a valid qemu-dm option, as reported a long time ago here:
https://bugzilla.redhat.com/show_bug.cgi?id=492958
Matches the near identical logic in qemu_conf.c
v2: When parsing sexpr, only match on ",server", rather than
full ',server,nowait'.
* Incorporated Jim's feedback (v1 & v2)
* Moved case of DEVTYPE == "wlan" up as it's definitive that we have a network interface.
* Made comment more detailed about the wired case to explain better
how it differentiates between wired network interfaces and USB
devices.
Eliminate almost all backward jumps by replacing this common pattern:
int
some_random_function(void)
{
int result = 0;
...
cleanup:
<unconditional cleanup code>
return result;
failure:
<cleanup code in case of an error>
result = -1;
goto cleanup
}
with this simpler pattern:
int
some_random_function(void)
{
int result = -1;
...
result = 0;
cleanup:
if (result < 0) {
<cleanup code in case of an error>
}
<unconditional cleanup code>
return result;
}
Add a bool success variable in functions that don't have a int result
that can be used for the new pattern.
Also remove some unnecessary memsets in error paths.
Otherwise, 'make check' in the python dir tries to reference a file in
docs that is built by 'make' but not by 'make check'.
* docs/Makefile.am (check-local): New rule.
Reported by Matthias Bolte.
The hotplug methods still had the qemuCmdFlags variable declared
as an int, instead of unsigned long long. This caused flag checks
to be incorrect for flags > 31
* src/qemu/qemu_driver.c: Fix integer overflow in hotplug
This allows libvirt to open the PCI device sysfs config file prior
to dropping privileges so qemu can access the full config space.
Without this, a de-privileged qemu can only access the first 64
bytes of config space.
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Detect support
for pci-assign.configfd option. Use this option when formatting
PCI device string if possible
* src/qemu/qemu_driver.c: Pre-open PCI sysfs config file and pass
to QEMU
We've been running into a lot of situations where
virGetHostname() is returning "localhost", where a plain
gethostname() would have returned the correct thing. This
is because virGetHostname() is *always* trying to canonicalize
the name returned from gethostname(), even when it doesn't
have to.
This patch changes virGetHostname so that if the value returned
from gethostname() is already FQDN or localhost, it returns
that string directly. If the value returned from gethostname()
is a shortened hostname, then we try to canonicalize it. If
that succeeds, we returned the canonicalized hostname. If
that fails, and/or returns "localhost", then we just return
the original string we got from gethostname() and hope for
the best.
Note that after this patch it is up to clients to check whether
"localhost" is an allowed return value. The only place
where it's currently not is in qemu migration.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
The virVirtualPortProfileFormat just went below the
virVirtualPortProfileParamsParseXML function and got inside the
The attached patch moves virVirtualPortProfileFormat below the #ifndef
PROXY block.
Allows listing existing pools and requesting information about them.
Alter the esxVI_ProductVersion enum in a way that allows to check for
product type by masking.
A build on Ubuntu reported:
|| Generating formatnwfilter.html.tmp
/dados/develop/libvirt/docs/formatnwfilter.html.in|390| HTML parser error : Unexpected end tag : p
|| </p>
|| ^
/dados/develop/libvirt/docs/formatnwfilter.html.in|705| HTML parser error : Unexpected end tag : code
|| <td>End of range of valid source ports</code></td>
|| ^
/dados/develop/libvirt/docs/formatnwfilter.html.in|710| HTML parser error : Unexpected end tag : code
|| <td>Start of range of valid destination ports</code></td>
|| ^
* docs/formatnwfilter.html.in: Fix invalid HTML constructs.
Reported by Eduardo Otubo.
* tests/daemon-conf: Accommodate the fact that out template,
daemon/libvirtd.conf now contains an invalid host_uuid.
Convert it to a valid one before the final libvirtd-running
test that must terminate normally.
This patch parses the following two XML descriptions, one for
802.1Qbg and one for 802.1Qbh, and stores the data internally.
The actual triggering of the switch setup protocol has not been
implemented here but the relevant code to do that should go into
the functions associatePortProfileId() and disassociatePortProfileId().
<interface type='direct'>
<source dev='eth0.100' mode='vepa'/>
<model type='virtio'/>
<virtualport type='802.1Qbg'>
<parameters managerid='12' typeid='0x123456' typeidversion='1'
instanceid='fa9b7fff-b0a0-4893-8e0e-beef4ff18f8f'/>
</virtualport>
<filterref filter='clean-traffic'/>
</interface>
<interface type='direct'>
<source dev='eth0.100' mode='vepa'/>
<model type='virtio'/>
<virtualport type='802.1Qbh'>
<parameters profileid='my_profile'/>
</virtualport>
</interface>
I'd suggest to use this patch as a base for triggering the setup
protocol with the 802.1Qb{g|h} switch.
Several rounds of changes were made to this patch. The
following is a list of these changes.
- Renamed structure virVirtualPortProfileDef to virVirtualPortProfileParams
as per Daniel Berrange's request
- Addressing Daniel Berrange's comments:
- removing macvtap.h's dependency on domain_conf.h by
moving the virVirtualPortProfileDef structure into macvtap.h
and not passing virtDomainNetDefPtr to any functions in
macvtap.c
- Addressed most of Chris Wright's comments:
- indicating error in case virtualport XML node cannot be parsed
properly
- parsing hex and decimal numbers using virStrToLong_ui() with
parameter '0' for base
- tgifname (target interface name) variable wasn't necessary
to pass to openMacvtapTap function anymore
- assigning the virtual port data structure to the virDomainNetDef
only if it was previously parsed
- make sure that the error code returned by openMacvtapTap() is a negative n
in case the associatePortProfileId() function failed.
- renaming vsi in the XML to virtualport
- replace all occurrences of vsi in the source as well
- removing mode and MAC address parameters from the functions that
will communicate with the hareware diretctly or indirectly
- moving the associate and disassociate functions to the end of the
file for subsequent patches to easier make them generally available
for export
- passing the macvtap interface name rather than the link device since
this otherwise gives funny side effects when using netlink messages
where IFLA_IFNAME and IFLA_ADDRESS are specified and the link dev
all of a sudden gets the MAC address of the macvtap interface.
- Removing rc = -1 error indications in the case of 802.1Qbg|h setup in case
we wanted to use hook scripts for the setup and so the setup doesn't fail
here.
- if instance ID UUID is not supplied it will automatically be generated
- adapted schema to make instance ID UUID optional
- added test case
- parser and XML generator have been separated into their own
functions so they can be re-used elsewhere (passthrough case
for example)
- Adapted XML parser and generator support the above shown type
(802.1Qbg, 802.1Qbh).
- Adapted schema to above XML
- Adapted test XML to above XML
- Passing through the VM's UUID which seems to be necessary for
802.1Qbh -- sorry no host UUID
- adding virtual function ID to association function, in case it's
necessary to use (for SR-IOV)
This patch introduces a dependency on libnl, which subsequent patches
will then use.
Changes from V1 to V2:
- added diffstats
- following changes in tree
Spurious / in a pool target path makes life difficult for apps using the
GetVolByPath, and doing other path based comparisons with pools. This
has caused a few issues for virt-manager users:
https://bugzilla.redhat.com/show_bug.cgi?id=494005https://bugzilla.redhat.com/show_bug.cgi?id=593565
Add a new util API which removes spurious /, virFileSanitizePath. Sanitize
target paths when parsing pool XML, and for paths passed to GetVolByPath.
v2: Leading // must be preserved, properly sanitize path=/, sanitize
away /./ -> /
v3: Properly handle starting ./ and ending /.
v4: Drop all '.' handling, just sanitize / for now.
Allow for a host UUID in the capabilities XML. Local drivers
will initialize this from the SMBIOS data. If a sanity check
shows SMBIOS uuid is invalid, allow an override from the
libvirtd.conf configuration file
* daemon/libvirtd.c, daemon/libvirtd.conf: Support a host_uuid
configuration option
* docs/schemas/capability.rng: Add optional host uuid field
* src/conf/capabilities.c, src/conf/capabilities.h: Include
host UUID in XML
* src/libvirt_private.syms: Export new uuid.h functions
* src/lxc/lxc_conf.c, src/qemu/qemu_driver.c,
src/uml/uml_conf.c: Set host UUID in capabilities
* src/util/uuid.c, src/util/uuid.h: Support for host UUIDs
* src/node_device/node_device_udev.c: Use the host UUID functions
* tests/confdata/libvirtd.conf, tests/confdata/libvirtd.out: Add
new host_uuid config option to test
The cgroups ACL code was only allowing the primary disk image.
It is possible to chain images together, so we need to search
for backing stores and add them to the ACL too. Since the ACL
only handles block devices, we ignore the EINVAL we get from
plain files. In addition it was missing code to teardown the
cgroup when hot-unplugging a disk
* src/qemu/qemu_driver.c: Allow backing stores in cgroup ACLs
and add missing teardown code in unplug path
Basic live migration was broken by the commit that added
non-shared block support in two ways:
1) It added a virCheckFlags() to doNativeMigrate(). Besides
the fact that typical usage of virCheckFlags() is in driver
entry points, and doNativeMigrate() is not an entry point,
it was missing important flags like VIR_MIGRATE_LIVE. Move
the virCheckFlags to the top-level qemuDomainMigratePrepare2
and friends.
2) It also added a memory leak in qemuMonitorTextMigrate()
by not freeing the memory used by virBufferContentAndReset().
This is fixed by storing the pointer in a temporary variable
and freeing it at the end.
With this patch in place, normal live migration works again.
v3: Instead of the churn for virCheckFlagsUI and UL, instead
always promote flags to an unsigned long and always use %lx
for the fprintf.
v2: Add back flags check, which required adding virCheckFlagsUI
and virCheckFlagsUL
Signed-off-by: Chris Lalancette <clalance@redhat.com>
Currently all host audio backends are disabled if a VM is using VNC, in
favor of the QEMU VNC audio extension. Unfortunately no released VNC
client supports this extension, so users have no way of getting audio
to work if using VNC.
Add a new config option in qemu.conf which allows changing libvirt's
behavior, but keep the default intact.
v2: Fix doc typos, change name to vnc_allow_host_audio
Unfortunately the NWFilter functions were outside of the
"extern C { ... }" declaration in include/libvirt/libvirt.h.in,
which means that they couldn't be properly used with C++. Move
them inside of the braces, which should fix the problem.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
The device path doesn't make use of guestAddr, so the memcpy corrupts
the guest info struct.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
The virDomainGetBlockInfo API allows query physical block
extent and allocated block extent. These are normally the
same value unless storing a special format like qcow2
inside a block device. In this scenario we can query QEMU
to get the actual allocated extent.
Since last time:
- Return fatal error in text monitor
- Only invoke monitor command for block devices
- Fix error handling JSON code
* src/qemu/qemu_driver.c: Fill in block aloction extent when VM
is running
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_json.h,
src/qemu/qemu_monitor_text.c, src/qemu/qemu_monitor_text.h: Add
API to query the highest block extent via info blockstats
* src/lxc/lxc_driver.c (lxcSetSchedulerParameters): Ensure that
"->field" is "cpu_shares" before possibly giving a diagnostic about
a type for a "cpu_shares" value.
Also, virCgroupSetCpuShares could fail without evoking a diagnostic.
Add one.
Volume detection in the scsi backend was duplicating code already
present in storage_backend.c. Let's drop the duplicate code.
Also, change the shared function name to be less generic, and remove
some error squashing in the other call site.
We were squashing error messages in a few cases. Recode to follow common
ret = -1 convention.
v2: Handle more error squashing issues further up in MakeNewVol and
CreateVols. Use ret = -1 convention in MakeVols.
Some diagnostics had a hard-coded "libvirtd: " prefix, some used
"error: " and some used "argv[0]: ". Always use "argv[0]: ".
* daemon/libvirtd.c (argv0): New global.
(main): Set it.
(version, usage): Remove argv0 parameter. Use global; update callers.
(daemonForkIntoBackground): Use argv0:, not error:.
(qemudWritePidFile): Start each diagnostic with argv0:.
Suggested by Eric Blake.
* daemon/libvirtd.c (daemonForkIntoBackground, main): Mark strings
for translation.
(usage): Rework --help so that it is translatable, replacing
each embedded, configuration-dependent, macro with an `%s'.
libvirtd: don't ignore virInitialize failure
* daemon/libvirtd.c (main): Diagnose virInitialize failure
and exit nonzero.
