This patch changes behavior of virPidFileRead to enable passing NULL as
path to the binary the pid file should be checked against to skip this
check. This enables using this function for reading files that have same
semantics as pid files, but belong to unknown processes.
Function xmlParseURI does not remove square brackets around IPv6
address when parsing. One of the solutions is making wrappers around
functions working with xmlURI*. This assures that uri->server will be
always properly assigned and it doesn't have to be changed when used
on some new place in the code.
For this purpose, functions virParseURI and virSaveURI were
added. These function are wrappers around xmlParseURI and xmlSaveUri
respectively.
Also there is one new syntax check function to prohibit these functions
anywhere else.
File changes:
- src/util/viruri.h -- declaration
- src/util/viruri.c -- definition
- src/libvirt_private.syms -- symbol export
- src/Makefile.am -- added source and header files
- cfg.mk -- added sc_prohibit_xmlURI
- all others -- ID name and include fixes
[forwarding this here from RH bug #796732]
When creating a network (virsh net-create) with an erroneous XML
containing an empty <name> element, the error message is misleading:
error: Failed to create network from foo.xml
error: missing domain name information
It took me a bit of time to figure out that it was the *network* name
that was missing (I generate this xml and didn't look at it, first).
I realized that the same message is used for missing name when creating
a domain, network, or device node.
This patch adds VIR_MIGRATE_UNSAFE flag for migration APIs and new
VIR_ERR_MIGRATION_UNSAFE error code. The error code should be returned
whenever migrating a domain is considered unsafe (e.g., it's configured
in a way that does not ensure data integrity once it is migrated).
VIR_MIGRATE_UNSAFE flag may be used to force migration even though it
would normally be considered unsafe and forbidden.
AC_CHECK_PROG checks for program in given path. However, if it doesn't
exists, [variable] is set to [value-if-not-found]. We don't want this
to be the empty string in case of 'modprobe' and 'scrub' as we want to
fallback to runtime detection.
* src/util/virfile.h: the virFileWrapperFdFlags being defined as
a globa variable instead of a type ended up generating a duplicate
symbol error.
* AUTHORS: added Lincoln Myers
This patch allows libvirt to add interfaces to already
existing Open vSwitch bridges. The following syntax in
domain XML file can be used:
<interface type='bridge'>
<mac address='52:54:00:d0:3f:f2'/>
<source bridge='ovsbr'/>
<virtualport type='openvswitch'>
<parameters interfaceid='921a80cd-e6de-5a2e-db9c-ab27f15a6e1d'/>
</virtualport>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03' function='0x0'/>
</interface>
or if libvirt should auto-generate the interfaceid use
following syntax:
<interface type='bridge'>
<mac address='52:54:00:d0:3f:f2'/>
<source bridge='ovsbr'/>
<virtualport type='openvswitch'>
</virtualport>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03' function='0x0'/>
</interface>
It is also possible to pass an optional profileid. To do that
use following syntax:
<interface type='bridge'>
<source bridge='ovsbr'/>
<mac address='00:55:1a:65:a2:8d'/>
<virtualport type='openvswitch'>
<parameters interfaceid='921a80cd-e6de-5a2e-db9c-ab27f15a6e1d'
profileid='test-profile'/>
</virtualport>
</interface>
To create Open vSwitch bridge install Open vSwitch and
run the following command:
ovs-vsctl add-br ovsbr
The auto-generated WWN comply with the new addressing schema of WWN:
<quote>
the first nibble is either hex 5 or 6 followed by a 3-byte vendor
identifier and 36 bits for a vendor-specified serial number.
</quote>
We choose hex 5 for the first nibble. And for the 3-bytes vendor ID,
we uses the OUI according to underlying hypervisor type, (invoking
virConnectGetType to get the virt type). e.g. If virConnectGetType
returns "QEMU", we use Qumranet's OUI (00:1A:4A), if returns
ESX|VMWARE, we use VMWARE's OUI (00:05:69). Currently it only
supports qemu|xen|libxl|xenapi|hyperv|esx|vmware drivers. The last
36 bits are auto-generated.
Now that no one is relying on the return value being a pointer to
somewhere inside of the passed-in argument, we can simplify the
callers to simply return success or failure. Also wrap some long
lines and add some const-correctness.
* src/util/sysinfo.c (virSysinfoParseBIOS, virSysinfoParseSystem)
(virSysinfoParseProcessor, virSysinfoParseMemory): Change return.
(virSysinfoRead): Adjust caller.
virFileDirectFd was used for accessing files opened with O_DIRECT using
libvirt_iohelper. We will want to use the helper for accessing files
regardless on O_DIRECT and thus virFileDirectFd was generalized and
renamed to virFileWrapperFd.
dmidecode displays processor information, followed by BIOS, system and
memory-DIMM details.
Calls to virSysinfoParseBIOS(), virSysinfoParseSystem() would update
the buffer pointer 'base', so the processor information would be lost
before virSysinfoParseProcessor() was called. Sysinfo would therefore
not be able to display processor details -- It only described <bios>,
<system> and <memory_device> details.
This patch attempts to insulate sysinfo from ordering of dmidecode
output.
Before the fix:
---------------
virsh # sysinfo
<sysinfo type='smbios'>
<bios>
....
</bios>
<system>
....
</system>
<memory_device>
....
</memory_device>
After the fix:
-------------
virsh # sysinfo
<sysinfo type='smbios'>
<bios>
....
</bios>
<system>
....
</system>
<processor>
....
</processor>
<memory_device>
....
</memory_device>
gcc 4.7 complains:
util/virhashcode.c:49:17: error: always_inline function might not be inlinable [-Werror=attributes]
util/virhashcode.c:35:17: error: always_inline function might not be inlinable [-Werror=attributes]
Normal 'inline' is a hint that the compiler may ignore; the fact
that the function is static is good enough. We don't care if the
compiler decided not to inline after all.
* src/util/virhashcode.c (getblock, fmix): Relax attribute.
virFileOpenAs previously would only try opening a file as the current
user, or as a different user, but wouldn't try both methods in a
single call. This made it cumbersome to use as a replacement for
open(2). Additionally, it had a lot of historical baggage that led to
it being difficult to understand.
This patch refactors virFileOpenAs in the following ways:
* reorganize the code so that everything dealing with both the parent
and child sides of the "fork+setuid+setgid+open" method are in a
separate function. This makes the public function easier to understand.
* Allow a single call to virFileOpenAs() to first attempt the open as
the current user, and if that fails to automatically re-try after
doing fork+setuid (if deemed appropriate, i.e. errno indicates it
would now be successful, and the file is on a networkFS). This makes
it possible (in many, but possibly not all, cases) to drop-in
virFileOpenAs() as a replacement for open(2).
(NB: currently qemuOpenFile() calls virFileOpenAs() twice, once
without forking, then again with forking. That unfortunately can't
be changed without at least some discussion of the ramifications,
because the requested file permissions are different in each case,
which is something that a single call to virFileOpenAs() can't deal
with.)
* Add a flag so that any fchown() of the file to a different uid:gid
is explicitly requested when the function is called, rather than it
being implied by the presence of the O_CREAT flag. This just makes
for less subtle surprises to consumers. (Commit
b1643dc15c added the check for O_CREAT
before forcing ownership. This patch just makes that restriction
more explicit.)
* If either the uid or gid is specified as "-1", virFileOpenAs will
interpret this to mean "the current [gu]id".
All current consumers of virFileOpenAs should retain their present
behavior (after a few minor changes to their setup code and
arguments).
Rename the src/util/netlink files to src/util/virnetlink to
better fit the naming scheme. Also rename nlComm to virNetlinkCommand.
Signed-off-by: D. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>
Sometimes, its easier to run children with 2>&1 in shell notation,
and just deal with stdout and stderr interleaved. This was already
possible for fd handling; extend it to also work when doing string
capture of a child process.
* docs/internals/command.html.in: Document this.
* src/util/command.c (virCommandSetErrorBuffer): Likewise.
(virCommandRun, virExecWithHook): Implement it.
* tests/commandtest.c (test14): Test it.
* daemon/remote.c (remoteDispatchAuthPolkit): Use new command
feature.
This patch adds API to modify domain metadata for running and stopped
domains. The api supports changing description, title as well as the
newly added <metadata> element. The API has support for storing data in
the metadata element using xml namespaces.
* include/libvirt/libvirt.h.in
* src/libvirt_public.syms
- add function headers
- add enum to select metadata to operate on
- export functions
* src/libvirt.c
- add public api implementation
* src/driver.h
- add driver support
* src/remote/remote_driver.c
* src/remote/remote_protocol.x
- wire up the remote protocol
* include/libvirt/virterror.h
* src/util/virterror.c
- add a new error message note that metadata for domain are
missing
If we are building not on a WIN32 architecture and without HAVE_CAPNG
virSetCapabilities has unused argument and virClearCapabilities
is unused as well.
This patch introduces virSetCapabilities() function and implements
virCommandAllowCap() function.
Existing virClearCapabilities() is function to clear all capabilities.
Instead virSetCapabilities() is function to set arbitrary capabilities.
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Shota Hirae <m11g1401@hibikino.ne.jp>
And hook it up for policykit auth. This allows virt-manager to detect
that the user clicked the policykit 'cancel' button and not throw
an 'authentication failed' error message at the user.
The virEmitXMLWarning function should always have been in
the xml.[hc] files, and should use virXML as its name
prefix
* src/util/util.c, src/util/util.h: Remove virEmitXMLWarning
* src/util/xml.c, src/util/xml.h: Add virXMLEmitWarning
On RHEL5, I got:
util/virrandom.c:66: warning: nested extern declaration of '_gl_verify_function66' [-Wnested-externs]
The fix is to hoist the verify earlier. Also some other hodge-podge
fixes I noticed while reviewing Dan's recent series.
* .gitignore: Ignore new test.
* src/util/cgroup.c: Bump copyright year.
* src/util/virhash.c: Fix typo in description.
* src/util/virrandom.c (virRandomBits): Mark doc comment, and
hoist assert to silence older gcc.
Recent discussions have illustrated the potential for DOS attacks
with the hash table implementations used by most languages and
libraries.
https://lwn.net/Articles/474912/
libvirt has an internal hash table impl, and uses hash tables for
a variety of purposes. The hash key generation code is pretty
simple and thus not strongly collision resistant.
This patch replaces the current libvirt hash key generator with
the (public domain) Murmurhash3 code. In addition every hash
table now gets a random seed value which is used to perturb the
hashing code. This should make it impossible to mount any
practical attack against libvirt hashing code.
* bootstrap.conf: Import bitrotate module
* src/Makefile.am: Add virhashcode.[ch]
* src/util/util.c: Make virRandom() return a fixed 32 bit
integer value.
* src/util/hash.c, src/util/hash.h, src/util/cgroup.c: Replace
hash code generation with a call to virHashCodeGen()
* src/util/virhashcode.h, src/util/virhashcode.c: Add a new
virHashCodeGen() API using the Murmurhash3 algorithm.
In preparation for the patch to include Murmurhash3, which
introduces a virhashcode.h and virhashcode.c files, rename
the existing hash.h and hash.c to virhash.h and virhash.c
respectively.
In preparation for conversion over to use the Murmurhash3
algorithm, convert various virHash APIs to use size_t or
uint32 for their return values/parameters, instead of the
variable size 'unsigned long' or 'int' types
The old virRandom() API was not generating good random numbers.
Replace it with a new API virRandomBits which instead of being
told the upper limit, gets told the number of bits of randomness
required.
* src/util/virrandom.c, src/util/virrandom.h: Add virRandomBits,
and move virRandomInitialize
* src/util/util.h, src/util/util.c: Delete virRandom and
virRandomInitialize
* src/libvirt.c, src/security/security_selinux.c,
src/test/test_driver.c, src/util/iohelper.c: Update for
changes from virRandom to virRandomBits
* src/storage/storage_backend_iscsi.c: Remove bogus call
to virRandomInitialize & convert to virRandomBits
In file included from ../gnulib/lib/unistd.h:51:0,
from ../src/util/util.h:30,
from rpc/virkeepalive.c:29:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/winsock2.h:15:2: warning: #warning Please include winsock2.h before windows.h [-Wcpp]
Reported by Marc-André Lureau.
* src/util/threads-win32.h (includes): Pick up winsock2.h before
windows.h, as required by mingw64.
Add a virFileTouch API which ensures that a file will always
exist, even if zero length
* src/util/virfile.c, src/util/virfile.h,
src/libvirt_private.syms: Introduce virFileTouch
POLLIN and POLLHUP are not mutually exclusive. Currently the following
seems possible: the child writes 3K to its stdout or stderr pipe, and
immediately closes it. We get POLLIN|POLLHUP (I'm not sure that's possible
on Linux, but SUSv4 seems to allow it). We read 1K and throw away the
rest.
When poll() returns and we're about to check the /revents/ member in a
given array element, let's map all the revents bits to two (independent)
ideas: "let's attempt to read()", and "let's attempt to write()". This
should cover all errors, EOFs, and normal conditions; the read()/write()
call should report any pending error.
Under this approach, both POLLHUP and POLLERR are mapped to "needs read()"
if we're otherwise prepared for POLLIN. POLLERR also maps to "needs
write()" if we're otherwise prepared for POLLOUT. The rest of the mappings
(POLLPRI etc.) would be easy, but probably useless for pipes.
Additionally, SUSv4 doesn't appear to forbid POLLIN|POLLERR (or
POLLOUT|POLLERR) set simultaneously. One could argue that the read() or
write() call would return without blocking in these cases (with an error),
so POLLIN / POLLOUT would be justified beside POLLERR.
The code now penalizes POLLIN|POLLERR differently from plain POLLERR. The
former (ie. read() returning -1) is terminal and we jump to cleanup, while
plain POLLERR masks only the affected file descriptor for the future.
Let's unify those.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
When converting a linear enum to a string, we have checks in
place in the VIR_ENUM_IMPL macro to ensure that there is one
string for every value, which lets us quickly flag if a user
added a value but forgot to add a counterpart string. However,
this only works if we use the _LAST marker.
* cfg.mk (sc_require_enum_last_marker): New syntax check.
* src/conf/domain_conf.h (virDomainSnapshotState): Add new marker.
* src/conf/domain_conf.c (virDomainSnapshotState): Fix offender.
* src/qemu/qemu_monitor_json.c (qemuMonitorWatchdogAction)
(qemuMonitorIOErrorAction, qemuMonitorGraphicsAddressFamily):
Likewise.
* src/util/virtypedparam.c (virTypedParameter): Likewise.
While we still don't want to enable gcc's new -Wformat-literal
warning, I found a rather easy case where the warning could be
reduced, by getting rid of obsolete error-reporting practices.
This is the last place where we were passing the (unused) net
and conn arguments for constructing an error.
* src/util/virterror_internal.h (virErrorMsg): Delete prototype.
(virReportError): Delete macro.
* src/util/virterror.c (virErrorMsg): Make static.
* src/libvirt_private.syms (virterror_internal.h): Drop export.
* src/util/conf.c (virConfError): Convert to macro.
(virConfErrorHelper): New function, and adjust error calls.
* src/xen/xen_hypervisor.c (virXenErrorFunc): Delete.
(xenHypervisorGetSchedulerType)
(xenHypervisorGetSchedulerParameters)
(xenHypervisorSetSchedulerParameters)
(xenHypervisorDomainBlockStats)
(xenHypervisorDomainInterfaceStats)
(xenHypervisorDomainGetOSType)
(xenHypervisorNodeGetCellsFreeMemory, xenHypervisorGetVcpus):
Update callers.
Preparation for another patch that refactors common patterns
into the new file for fewer lines of code overall.
* src/util/util.h (virTypedParameterArrayClear): Move...
* src/util/virtypedparam.h: ...to new file.
(virTypedParameterArrayValidate, virTypedParameterAssign): New
prototypes.
* src/util/util.c (virTypedParameterArrayClear): Likewise.
* src/util/virtypedparam.c: New file.
* po/POTFILES.in: Mark file for translation.
* src/Makefile.am (UTIL_SOURCES): Build it.
* src/libvirt_private.syms (util.h): Split...
(virtypedparam.h): to new section.
(virkeycode.h): Sort.
* daemon/remote.c: Adjust callers.
* tools/virsh.c: Likewise.
We had a memory leak on a very arcane OOM situation (unlikely to ever
hit in practice, but who knows if libvirt.so would ever be linked
into some other program that exhausts all thread-local storage keys?).
I found it by code inspection, while analyzing a valgrind report
generated by Alex Jia.
* src/util/threads.h (virThreadLocalSet): Alter signature.
* src/util/threads-pthread.c (virThreadHelper): Reduce allocation
lifetime.
(virThreadLocalSet): Detect failure.
* src/util/threads-win32.c (virThreadLocalSet): Likewise.
(virCondWait): Fix caller.
* src/util/virterror.c (virLastErrorObject): Likewise.
Given an LXC guest with a root filesystem path of
/export/lxc/roots/helloworld/root
During startup, we will pivot the root filesystem to end up
at
/.oldroot/export/lxc/roots/helloworld/root
We then try to open
/.oldroot/export/lxc/roots/helloworld/root/dev/pts
Now consider if '/export/lxc' is an absolute symlink pointing
to '/media/lxc'. The kernel will try to open
/media/lxc/roots/helloworld/root/dev/pts
whereas it should be trying to open
/.oldroot//media/lxc/roots/helloworld/root/dev/pts
To deal with the fact that the root filesystem can be moved,
we need to resolve symlinks in *any* part of the filesystem
source path.
* src/libvirt_private.syms, src/util/util.c,
src/util/util.h: Add virFileResolveAllLinks to resolve
all symlinks in a path
* src/lxc/lxc_container.c: Resolve all symlinks in filesystem
paths during startup
pciTrySecondaryBusReset checks if there is active device on the
same bus, however, qemu driver doesn't maintain an effective
list for the inactive devices, and it passes meaningless argument
for parameter "inactiveDevs". e.g. (qemuPrepareHostdevPCIDevices)
if (!(pcidevs = qemuGetPciHostDeviceList(hostdevs, nhostdevs)))
return -1;
..skipped...
if (pciResetDevice(dev, driver->activePciHostdevs, pcidevs) < 0)
goto reattachdevs;
NB, the "pcidevs" used above are extracted from domain def, and
thus one won't be able to attach a device of which bus has other
device even detached from host (nodedev-detach). To see more
details of the problem:
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=773667
This patch is to resolve the problem by introducing an inactive
PCI device list (just like qemu_driver->activePciHostdevs), and
the whole logic is:
* Add the device to inactive list during nodedev-dettach
* Remove the device from inactive list during nodedev-reattach
* Remove the device from inactive list during attach-device
(for non-managed device)
* Add the device to inactive list after detach-device, only
if the device is not managed
With the above, we have a sufficient inactive PCI device list, and thus
we can use it for pciResetDevice. e.g.(qemuPrepareHostdevPCIDevices)
if (pciResetDevice(dev, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto reattachdevs;
Detected by Coverity. Although unlikely, if we are ever started
with stdin closed, we could reach a situation where we open a
uuid file but then fail to close it, making that file the new
stdin for the rest of the process.
* src/util/uuid.c (getDMISystemUUID): Allow for stdin.
This functions enables us to get the Virtual Functions attached to
a Physical function given the name of a SR-IOV physical functio.
In order to accomplish the task, added a getter function pciGetDeviceAddrString
to get the BDF of the Virtual Function in a char array.
Commit db371a2 mistakenly added new functions inside a #ifndef WIN32
guard, even though they are needed on all platforms.
* src/util/command.c (virCommandFDSet): Move outside WIN32
conditional.
Currently, virCommand implementation uses FD_ macros from
sys/select.h. However, those cannot handle more opened files
than FD_SETSIZE. Therefore switch to generalized implementation
based on array of integers.
It is a good practise to set revents to zero before doing any poll().
Moreover, we should check if event we waited for really occurred or
if any of fds we were polling on didn't encountered hangup.
A generic error code was returned, if the user aborted a migration job.
This made it hard to distinguish between a user requested abort and an
error that might have occured. This patch introduces a new error code,
which is returned in the specific case of a user abort, while leaving
all other failures with their existing code. This makes it easier to
distinguish between failure while mirgrating and an user requested
abort.
* include/libvirt/virterror.h: - add new error code
* src/util/virterror.c: - add message for the new error code
* src/qemu/qemu_migration.h: - Emit operation aborted error instead of
operation failed, on migration abort
Pool creates new workers dynamically. However, it is possible
for a pool to have no workers. If we want to free that pool,
we don't want to wait on quit condition as it will never be
signaled.
On RHEL 5, with libxml2-2.6.26, the build failed with:
virsh.c: In function 'vshNodeIsSuperset':
virsh.c:11951: warning: implicit declaration of function 'xmlChildElementCount'
(or if warnings aren't errors, a link failure later on).
* src/util/xml.h (virXMLChildElementCount): New prototype.
* src/util/xml.c (virXMLChildElementCount): New function.
* src/libvirt_private.syms (xml.h): Export it.
* tools/virsh.c (vshNodeIsSuperset): Use it.
https://bugzilla.redhat.com/show_bug.cgi?id=648855 mentioned a
misuse of 'an' where 'a' is proper; that has since been fixed,
but a search found other problems (some were a spelling error for
'and', while most were fixed by 'a').
* daemon/stream.c: Fix grammar.
* src/conf/domain_conf.c: Likewise.
* src/conf/domain_event.c: Likewise.
* src/esx/esx_driver.c: Likewise.
* src/esx/esx_vi.c: Likewise.
* src/rpc/virnetclient.c: Likewise.
* src/rpc/virnetserverprogram.c: Likewise.
* src/storage/storage_backend_fs.c: Likewise.
* src/util/conf.c: Likewise.
* src/util/dnsmasq.c: Likewise.
* src/util/iptables.c: Likewise.
* src/xen/xen_hypervisor.c: Likewise.
* src/xen/xend_internal.c: Likewise.
* src/xen/xs_internal.c: Likewise.
* tools/virsh.c: Likewise.
virBufferContentAndReset (intentionally) returns NULL for a buffer
with no content, but it is feasible to invoke a command with an
explicit empty string.
* src/util/command.c (virCommandAddEnvBuffer): Reject empty string.
(virCommandAddArgBuffer): Allow explicit empty argument.
* tests/commandtest.c (test9): Test it.
* tests/commanddata/test9.log: Adjust.
The RPC fixups needed on Linux are also needed on cygwin, and
worked without further tweaking to the list of fixups. Also,
unlike BSD, Cygwin exports 'struct ifreq', but unlike Linux,
Cygwin lacks the ioctls that we were using 'struct ifreq' to
access. This patch allows compilation under cygwin.
* src/rpc/genprotocol.pl: Also perform fixups on cygwin.
* src/util/virnetdev.c (HAVE_STRUCT_IFREQ): Also require AF_PACKET
definition.
* src/util/virnetdevbridge.c (virNetDevSetupControlFull): Only
compile if SIOCBRADDBR works.
This ought to fix the build if you have net/if.h but do
not have struct ifreq
* configure.ac: Check for struct ifreq in net/if.h
* src/util/virnetdev.c: Conditionalize to avoid use of
struct ifreq if it does not exist
The glibc time.h header has an undocumented __isleap macro
that we are using. Since it is undocumented & does not appear
on any other OS, stop using it and just define the macro in
libvirt code instead.
* src/util/virtime.c: Remove __isleap usage
Detected by Coverity. Leak introduced in commit c1df2c1.
Two bugs here:
1. memory leak on successful parse
2. failure to parse still returned success
Signed-off-by: Alex Jia <ajia@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
The virTimestamp and virTimeMs functions in src/util/util.h
duplicate functionality from virtime.h, in a non-async signal
safe manner. Remove them, and convert all code over to the new
APIs.
* src/util/util.c, src/util/util.h: Delete virTimeMs and virTimestamp
* src/lxc/lxc_driver.c, src/qemu/qemu_domain.c,
src/qemu/qemu_driver.c, src/qemu/qemu_migration.c,
src/qemu/qemu_process.c, src/util/event_poll.c: Convert to use
virtime APIs
The logging APIs need to be able to generate formatted timestamps
using only async signal safe functions. This rules out using
gmtime/localtime/malloc/gettimeday(!) and much more.
Introduce a new internal API which is async signal safe.
virTimeMillisNowRaw replacement for gettimeofday. Uses clock_gettime
where available, otherwise falls back to the unsafe
gettimeofday
virTimeFieldsNowRaw replacements for gmtime(), convert a timestamp
virTimeFieldsThenRaw into a broken out set of fields. No localtime()
replacement is provided, because converting to
local time is not practical with only async signal
safe APIs.
virTimeStringNowRaw replacements for strftime() which print a timestamp
virTimeStringThenRaw into a string, using a pre-determined format, with
a fixed size buffer (VIR_TIME_STRING_BUFLEN)
For each of these there is also a version without the Raw postfix
which raises a full libvirt error. These versions are not async
signal safe
* src/Makefile.am, src/util/virtime.c, src/util/virtime.h: New files
* src/libvirt_private.syms: New APis
* configure.ac: Check for clock_gettime in -lrt
* tests/virtimetest.c, tests/Makefile.am: Test new APIs
If suspend failed for some reason (e.g. too short duration) then
subsequent attempts to trigger suspend were rejected because we
had already marked a suspend as being in progress
* src/util/virnodesuspend.c: Don't mark suspend as active
until we've successfully triggered it
The command name for the suspend action does not need to be
strdup'd. The constant string can be used directly. This
also means the code can be trivially rearranged to make the
switch clearer
* src/util/virnodesuspend.c: Remove strdup of cmdString
To avoid probing the host power management features on any
call to virInitialize, only initialize the mutex in
virNodeSuspendInit. Do lazy load of the supported PM target
mask when it is actually needed
* src/util/virnodesuspend.c: Lazy init of supported features
If we ensure that virNodeSuspendGetTargetMask always resets
*bitmask to zero upon failure, there is no need for the
powerMgmt_valid field.
* src/util/virnodesuspend.c: Ensure *bitmask is zero upon
failure
* src/conf/capabilities.c, src/conf/capabilities.h: Remove
powerMgmt_valid field
* src/qemu/qemu_capabilities.c: Remove powerMgmt_valid
The node suspend capabilities APIs should not have been put into
util.[ch]. Instead move them into virnodesuspend.[ch]
* src/util/util.c, src/util/util.h: Remove suspend capabilities APIs
* src/util/virnodesuspend.c, src/util/virnodesuspend.h: Add
suspend capabilities APIs
* src/qemu/qemu_capabilities.c: Include virnodesuspend.h
Rename virGetPMCapabilities to virNodeSuspendGetTargetMask and
virDiscoverHostPMFeature to virNodeSuspendSupportsTarget.
* src/util/util.c, src/util/util.h: Rename APIs
* src/qemu/qemu_capabilities.c, src/util/virnodesuspend.c: Adjust
for new names
Since virDiscoverHostPMFeature is just checking one feature,
there is no reason for it to return a bitmask. Change it to
return a boolean
* src/util/util.c, src/util/util.h: Make virDiscoverHostPMFeature
return a boolean
The virHostPMCapability enum helper was declared in util.h
but implemented in capabilities.c, which is in a completely
separate library at link time. Move the declaration into the
capabilities.c file and rename it to match normal conventions
* src/util/util.h: Remove virHostPMCapability enum decl
* src/conf/capabilities.c: Add virCapsHostPMTarget enum
The internal virHostPMCapability enum just duplicates the
public virNodeSuspendTarget enum, but with different names.
* src/util/util.c: Use VIR_NODE_SUSPEND_TARGET constants
* src/util/util.h: Remove virHostPMCapability enum
* src/conf/capabilities.c: Use VIR_NODE_SUSPEND_TARGET_LAST
The VIR_NODE_SUSPEND_TARGET constants are not flags, so they
should just be assigned straightforward incrementing values.
* include/libvirt/libvirt.h.in: Change VIR_NODE_SUSPEND_TARGET
values
* src/util/virnodesuspend.c: Fix suspend target checks
Detected by Coverity. the only case is caller passes a NULL to 'format' variable,
then taking 'if (format)' false branch, the function qcow2GetBackingStoreFormat
will directly dereferences the NULL 'format' pointer variable.
Signed-off-by: Alex Jia <ajia@redhat.com>
Add the core functions that implement the functionality of the API.
Suspend is done by using an asynchronous mechanism so that we can return
the status to the caller before the host gets suspended. This asynchronous
operation is achieved by suspending the host in a separate thread of
execution. However, returning the status to the caller is only best-effort,
but not guaranteed.
To resume the host, an RTC alarm is set up (based on how long we want to
suspend) before suspending the host. When this alarm fires, the host
gets woken up.
Suspend-to-RAM operation on a host running Linux can take upto more than 20
seconds, depending on the load of the system. (Freezing of tasks, an operation
preceding any suspend operation, is given up after a 20 second timeout).
And Suspend-to-Disk can take even more time, considering the time required
for compaction, creating the memory image and writing it to disk etc.
So, we do not allow the user to specify a suspend duration of less than 60
seconds, to be on the safer side, since we don't want to prematurely declare
failure when we only had to wait for some more time.
Some systems support a feature known as 'Hybrid-Suspend', apart from the
usual system-wide sleep states such as Suspend-to-RAM (S3) or Suspend-to-Disk
(S4). Add the functionality to discover this power management feature and
export it in the capabilities XML under the <power_management> tag.
When aligning you need to clear the bits in the mask and leave the
others aside. Likely this code has never run, and will never run.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
virConnectSetKeepAlive public API can be used by a client connecting to
remote server to start using keepalive protocol. The API is handled
directly by remote driver and not transmitted over the wire to the
server.
