With QEMU >= 0.12 the host and guest side of disks no longer have
the same naming convention. Specifically the host side will now
get a 'drive-' prefix added to its name. The 'info blockstats'
monitor command returns the host side name, so it is neccessary
to strip this off when looking up stats since libvirt stores the
guest side name !
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Move 'drive-' prefix
string to a defined constant
* src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_text.c: Strip
off 'drive-' prefix (if found) when looking up disk stats
Currently the timeout for reading startup output is 3 seconds. If the
host is under any sort of load, we can easily trigger this. Lets bump
it to 30 seconds.
Since the polling loop checks to see if the process has died, we shouldn't
erroneously hit this timeout if qemu bombs (only if it is stuck in some
infinite loop).
Use the ATTRIBUTE_NONNULL annotation to mark some virConnectPtr
args as mandatory non-null so the compiler can warn of mistakes
* src/conf/domain_event.h: All virConnectPtr args must be non-null
* src/qemu/qemu_conf.h: qemudBuildCommandLine and
qemudNetworkIfaceConnect() must be given non-null connection
* tests/qemuxml2argvtest.c: Provide a non-null (dummy) connection to
qemudBuildCommandLine()
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in secret_conf.{h,c} and update all callers to
match
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in interface_conf.{h,c} and update all callers to
match
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in cpu_conf.{h,c} and update all callers to
match
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in storage_conf.{h,c} and storage_encryption_conf.{h,c}
and update all callers to match
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in node_device_conf.{h,c} and update all callers to
match
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in network_conf.{h,c} and update all callers to
match
All callers now pass a NULL virConnectPtr into the USB/PCi device
iterator functions. Therefore the virConnectPtr arg can now be
removed from these functions
* src/util/hostusb.h, src/util/hostusb.c: Remove virConnectPtr
from usbDeviceFileIterate
* src/util/pci.c, src/util/pci.h: Remove virConnectPtr arg from
pciDeviceFileIterate
* src/qemu/qemu_security_dac.c, src/security/security_selinux.c: Update
to drop redundant virConnectPtr arg
The QEMU flags are commonly stored as a signed or unsigned int,
allowing only 31 flags. This limit is rather close, so to aid
future patches, change it to a 64-bit int
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h, src/qemu/qemu_driver.c,
tests/qemuargv2xmltest.c, tests/qemuhelptest.c, tests/qemuxml2argvtest.c:
Use 'unsigned long long' for QEMU flags
The virConnectPtr is no longer required for error reporting since
that is recorded in a thread local. Remove use of virConnectPtr
from all APIs in security_driver.{h,c} and update all callers to
match
The security driver was mistakenly initialized before the QEMU
config file was loaded. This prevents it being turned off again.
The capabilities XML was also getting the wrong security driver
name, due to the stacked driver arrangement.
* src/qemu/qemu_driver.c: Fix initialization order and capabilities
model name
* src/util/util.h (virAsprintf): Remove ATTRIBUTE_RETURN_CHECK, since
it is perfectly fine to ignore the return value, now that the pointer
is guaranteed to be set to NULL upon failure.
* src/util/storage_file.c (absolutePathFromBaseFile): Remove now-
unnecessary use of ignore_value.
* src/util/storage_file.c (absolutePathFromBaseFile): While this use
of virAsprintf is slightly cleaner than using stpncpy(stpcpy(...,
it does impose an artificial limitation on the length of the base_file
name. Rather than asserting that it does not exceed INT_MAX, return
NULL when it does.
When creating preallocated large raw files opening them with O_DSYNC
prevents long delays in reading because cache pages can be immediately
reused without writing them on a disk first.
virDomain{Attach,Detach}Device is now only permitted on active
domains. Explicitly state this restriction in the API
documentation.
V2: Only change doc, dropping the hunk that forced the restriction
in libvirt frontend.
When configured with --enable-gcc-warnings, it didn't even compile.
* src/util/storage_file.c: Include <assert.h>.
(absolutePathFromBaseFile): Assert that converting size_t to int is valid.
Reverse length/string args to match "%.*s".
Explicitly ignore the return value of virAsprintf.
* src/util/storage_file.c: Include "dirname.h".
(absolutePathFromBaseFile): Rewrite not to leak, and to require
fewer allocations.
* bootstrap (modules): Add dirname-lgpl.
* .gnulib: Update submodule to the latest.
When restoring from a saved guest image, the XML would already
contain the PCI slot ID of the IDE controller & video card.
The attempt to explicitly reserve this upfront would thus fail
everytime.
* src/qemu/qemu_conf.c: Reserve IDE controller / video card
slot at time of need, rather than upfront
Similar fix as previous one but for fork() usage when creating
a file or directory
* src/util/util.c: virLogLock() and virLogUnlock() around fork()
in virFileCreate() and virDirCreateSimple()
Ad pointed out by Dan Berrange:
So if some thread in libvirtd is currently executing a logging call,
while another thread calls virExec(), that other thread no longer
exists in the child, but its lock is never released. So when the
child then does virLogReset() it deadlocks.
The only way I see to address this, is for the parent process to call
virLogLock(), immediately before fork(), and then virLogUnlock()
afterwards in both parent & child. This will ensure that no other
thread
can be holding the lock across fork().
* src/util/logging.[ch] src/libvirt_private.syms: export virLogLock() and
virLogUnlock()
* src/util/util.c: lock just before forking and unlock just after - in
both parent and child.
The original udev node device backend neglected to lock the driverState
struct containing the device list when adding and removing devices
* src/node_device/node_device_udev.c: add necessary locks in
udevRemoveOneDevice() and udevAddOneDevice()
* src/xen/xs_internal.c (xenStoreDomainIntroduced): Don't use -1
as an allocation size upon xenStoreNumOfDomains failure.
(xenStoreDomainReleased): Likewise.
If the primary security driver (SELinux/AppArmour) was disabled
then the secondary QEMU DAC security driver was also disabled.
This is mistaken, because the latter must be active at all times
* src/qemu/qemu_driver.c: Ensure DAC driver is always active
* src/xen/xen_hypervisor.c: Remove all "domain == NULL" tests.
* src/xen/xen_hypervisor.h: Instead, use ATTRIBUTE_NONNULL to
mark each "domain" parameter as "known always to be non-NULL".
When attaching a USB host device based on vendor/product, libvirt
will resolve the vendor/product into a device/bus pair. This means
that when printing XML we should allow device/bus info to be printed
at any time if present
* src/conf/domain_conf.c, docs/schemas/domain.rng: Allow USB device
bus info alongside vendor/product
To allow devices to be hot(un-)plugged it is neccessary to ensure
they all have a unique device aliases. This fixes the hotplug
methods to assign device aliases before invoking the monitor
commands which need them
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Expose methods
for assigning device aliases for disks, host devices and
controllers
* src/qemu/qemu_driver.c: Assign device aliases when hotplugging
all types of device
* tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address-device.args,
tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-address-device.args:
Update for changed hostdev naming scheme
This patch re-arranges the QEMU device alias assignment code to
make it easier to call into the same codeblock when performing
device hotplug. The new code has the ability to skip over already
assigned names to facilitate hotplug
* src/qemu/qemu_driver.c: Call qemuAssignDeviceNetAlias()
instead of qemuAssignNetNames
* src/qemu/qemu_conf.h: Export qemuAssignDeviceNetAlias()
instead of qemuAssignNetNames
* src/qemu/qemu_driver.c: Merge the legacy disk/network alias
assignment code into the main methods
The current way of assigning names to the host network backend and
NIC device in QEMU was over complicated, by varying naming scheme
based on the NIC model and backend type. This simplifies the naming
to simply be 'net0' and 'hostnet0', allowing code to easily determine
the host network name and vlan based off the primary device alias
name 'net0'. This in turn allows removal of alot of QEMU specific
code from the XML parser, and makes it easier to assign new unique
names for NICs that are hotplugged
* src/conf/domain_conf.c, src/conf/domain_conf.h: Remove hostnet_name
and vlan fields from virNetworkDefPtr
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h, src/qemu/qemu_driver.c:
Use a single network alias naming scheme regardless of NIC type
or backend type. Determine VLANs from the alias name.
* tests/qemuxml2argvdata/qemuxml2argv-net-eth-names.args,
tests/qemuxml2argvdata/qemuxml2argv-net-virtio-device.args,
tests/qemuxml2argvdata/qemuxml2argv-net-virtio-netdev.args: Update
for new simpler naming scheme
The QEMU 0.12.x tree has the -netdev command line argument, but not
corresponding monitor command. We can't enable the former, without
the latter since it will break hotplug/unplug.
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Disable -netdev usage
until 0.13 at earliest
* tests/qemuxml2argvtest.c: Add test for -netdev syntax
* tests/qemuxml2argvdata/qemuxml2argv-net-virtio-netdev.args,
tests/qemuxml2argvdata/qemuxml2argv-net-virtio-netdev.xml: Test
data files for -netdev syntax
PCI disk, disk controllers, net devices and host devices need to
have PCI addresses assigned before they are hot-plugged
* src/qemu/qemu_conf.c: Add APIs for ensuring a device has an
address and releasing unused addresses
* src/qemu/qemu_driver.c: Ensure all devices have addresses
when hotplugging.
The current QEMU code allocates PCI addresses incrementally starting
at 4. This is not satisfactory because the user may have given some
addresses in their XML config, which need to be skipped over when
allocating addresses to remaining devices.
It is thus neccessary to maintain a list of already allocated PCI
addresses and then only allocate ones that remain unused. This is
also required for domain device hotplug to work properly later.
* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Add APIs for creating
list of existing PCI addresses, and allocating new addresses.
Refactor address assignment to use this code
* src/qemu/qemu_driver.c: Pull PCI address assignment up into the
qemuStartVMDaemon() method, as a prelude to moving it into the
'define' method. Update list of allocated addresses when connecting
to a running VM at daemon startup.
* tests/qemuxml2argvtest.c, tests/qemuargv2xmltest.c,
tests/qemuxml2xmltest.c: Remove USB product test since all
passthrough is done based on address
* tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-product.args,
tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-product.xml: Kil
unused data files
The virDomainDeviceInfoIterate() function will provide a
convenient way to iterate over all devices in a domain.
* src/conf/domain_conf.c, src/conf/domain_conf.h,
src/libvirt_private.syms: Add virDomainDeviceInfoIterate()
function.
Since QEMU startup uses the new -device argument, the hotplug
code needs todo the same. This converts disk, network and
host device hotplug to use the device_add command
* src/qemu/qemu_driver.c: Use new device_add monitor APIs
whereever possible
The way QEMU is started has been changed to use '-device' and
the new style '-drive' syntax. This needs to be mirrored in
the hotplug code, requiring addition of two new APIs.
* src/qemu/qemu_monitor.h, src/qemu/qemu_monitor.c: Define APIs
qemuMonitorAddDevice() and qemuMonitorAddDrive()
* src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_json.h,
src/qemu/qemu_monitor_text.c, src/qemu/qemu_monitor_text.h:
Implement the new monitor APIs
To allow for better code reuse from hotplug methods, the code for
generating PCI/USB hostdev arg values is split out into separate
methods
* qemu/qemu_conf.h, qemu/qemu_conf.c: Introduce new APis for
qemuBuildPCIHostdevPCIDevStr, qemuBuildUSBHostdevUsbDevStr
and qemuBuildUSBHostdevDevStr
All the helper functions for building command line arguments
now return a 'char *', instead of acepting a 'char **' or
virBufferPtr argument
* qemu/qemu_conf.c: Standardize syntax for building args
* qemu/qemu_conf.h: Export all functions for building args
* qemu/qemu_driver.c: Update for changed syntax for building
NIC/hostnet args
udevGetUintProperty was called with base set to 0 for busnum and devnum.
With base 0 strtoul parses the number as octal if it start with a 0. But
busnum and devnum are decimal and udev returns them padded with leading
zeros. So strtoul parses them as octal. This works for certain decimal
values like 001-007, but fails for values like 008.
Change udevProcessUSBDevice to use base 10 for busnum and devnum.
* src/util/util.c (virGetUserID, virGetGroupID): In the unlikely event
that sysconf(_SC_GETPW_R_SIZE_MAX) fails, don't use -1 as the size in
the subsequent allocation.
Similar to the race fixed by
be34c3c7ef, make sure
to wait around for KVM to release the resources from
a hot-detached PCI device before attempting to
rebind that device to the host driver.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
The QEMU driver contained code to generate a -device string for piix4-ide, but
wasn't using it. This change removes this string generation. It also adds a
comment explaining why IDE and FDC controllers don't generate -device strings.
The change also generates an error if a sata controller is specified for a QEMU
domain, as this isn't supported.
* src/qemu/qemu_conf.c: Remove VIR_DOMAIN_CONTROLLER_TYPE_IDE handler in
qemuBuildControllerDevStr(). Ignore IDE and FDC controllers. Error if
SATA controller is discovered. Add comments.
On RHEL-5 the qemu-kvm binary is located in /usr/libexec.
To reduce confusion for people trying to run upstream libvirt
on RHEL-5 machines, make the qemu driver look in /usr/libexec
for the qemu-kvm binary.
To make this work, I modified virFindFileInPath to handle an
absolute path correctly. I also ran into an issue where
NULL was sometimes being passed for the file parameter
to virFindFileInPath; it didn't crash prior to this patch
since it was building paths like /usr/bin/(null). This
is non-standard behavior, though, so I added a NULL
check at the beginning.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
* src/util/util.c (virGetUserEnt): In the unlikely event that
sysconf(_SC_GETPW_R_SIZE_MAX) fails, don't use -1 as the size in
the subsequent allocation.
xen-unstable c/s 20762 bumped XEN_SYSCTL_INTERFACE_VERSION to 7. The
interface change does not affect libvirt, other than xenHypervisorInit()
failing since version 7 is not tried.
The attached patch accommodates the upcoming Xen 4.0 release by checking
for XEN_SYSCTL_INTERFACE_VERSION 7. If found, it sets
XEN_DOMCTL_INTERFACE_VERSION to 6, which is also new to Xen 4.0.
it causes a NULL-dereference on some systems like Solaris 10.
* src/node_device/node_device_linux_sysfs.c. Include <stdlib.h>.
(get_sriov_function): Use canonicalize_file_name, not realpath.
* bootstrap (modules): Add canonicalize-lgpl.
This fixes a segfault when the event handler is called after shutdown
when the global driver state is NULL again.
Also fix a locking issue in an error path.
virFileMakePath is a recursive function that was creates a buffer
PATH_MAX bytes long for each recursion (one recursion for each element
in the path). This changes it to have no buffers on the stack, and to
allocate just one buffer total, no matter how many elements are in the
path. Because the modified algorithm requires a char* to be passed in
rather than const char *, it is now 2 functions - a toplevel API
function that remains identical in function, and a 2nd helper function
called for the recursions, which 1) doesn't allocate anything, and 2)
takes a char* arg, so it can modify the contents.
* src/util/util.c: rewrite virFileMakePath
