The parent object takes ownership of the inserted value once all checks
pass. Don't make the callers second-guess when that happens and modify
the function to take a double pointer so that it can be cleared once the
ownership is taken.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_autoptr for the JSON value objects and remove the cleanup label
and inline freeing of objects.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_autofree for the pointer of the added object and remove the NULL
checks for values returned by virJSONValueNew* (except
virJSONValueNewNumberDouble) since they can't fail nowadays.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We know the exact number of keys or array members for the copied objects
so we can pre-allocate the arrays rather than inserting into them in a
loop incurring realloc copy penalty.
Also virJSONValueCopy now can't fail since all of the functions
allocating the different cases use just g_new/g_strdup internally so we
can remove the NULL checks from the recursive calls.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The function takes ownership of @value on success so the proper
semantics will be to clear out the @value pointer. Convert @value to a
double pointer to do this.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The functions report errors already and the error can nowadays only
happen on programmer errors (if the passed virJSONValue isn't an
object), which won't happen. Remove the reporting.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
For incremental backup we need QEMU_CAPS_BLOCKDEV,
QEMU_CAPS_BLOCKDEV_REOPEN, QEMU_CAPS_MIGRATION_PARAM_BLOCK_BITMAP_MAPPING.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Preserve block dirty bitmaps after migration with
QEMU_MONITOR_MIGRATE_NON_SHARED_(DISK|INC).
This patch implements functions which offer the bitmaps to the
destination, check for eligibility on destination and then configure
source for the migration.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
In case when the block migration job required temporary bitmaps for
merging the appropriate checkpoints we need to clean them up when
cancelling the job. On success we don't need to do that though as the
bitmaps are just temporary thus are not written to disk.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Add status XML infrastructure for storing a list of block dirty bitmaps
which are temporarily used when migrating a VM with
VIR_MIGRATE_NON_SHARED_DISK for cleanup after a libvirtd restart during
migration.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
'qemuMigrationCookieBlockDirtyBitmapsMatchDisks' maps the bitmaps from
the migration cookie to actual disk objects definition pointers.
'qemuMigrationCookieBlockDirtyBitmapsToParams' converts the bitmap
definitions from the migration cookie into parameters for the
'block-bitmap-mapping' migration parameter.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
In cases where we are copying the storage we need to ensure that also
bitmaps are copied properly. This patch adds migration cookie XML
infrastructure which will allow the migration sides reach consensus on
which bitmaps to migrate.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Add the migration capability flag and the propagation of the
corresponding mapping configuration. The mapping will be produced from
the bitmaps on disk depending on both sides of the migration and the
necessity to perform merges.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
There's no need in the cleanup steps to invoke a transaction to delete a
single bitmap.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The non-transaction wrapper is useful for code paths which want to
delete individual bitmaps or for cleanup after a failed job where we
want to attempt to delete every bitmap individually to prevent a failure
from cleaning up the rest.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Use the new format when pre-creating the image for the user. Users
wishing to use the legacy format can always provide their own images or
use shared storage.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Such images don't support stuff like dirty bitmaps. Note that the
synthetic test for detecting bitmaps is used as an example to prevent
adding additional test cases.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The capability represents qemu's ability to setup mappings for migrating
block dirty bitmaps and is based on presence of the 'transform' property
of the 'block-bitmap-mapping' property of 'migrate-set-parameters' QMP
command.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This patch partially reverts commit 5cde9dee where the qemuExtDevicesStop()
was moved to a location before the QEMU process is stopped. It may be
alright to tear down some devices before QEMU is stopped, but it doesn't work
for the external TPM (swtpm) which assumes that QEMU sends it a signal to stop
it before libvirt may try to clean it up. So this patch moves the
virFileDeleteTree() calls after the call to qemuExtDevicesStop() so that the
pid file of virtiofsd is not deleted before that call.
Afftected libvirt versions are 6.10 and 7.0.
Fixes: 5cde9dee8c
Cc: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
A VM defined similar to:
...
<features><kvm><hint-dedicated state='on'/></kvm></features>
<cpu mode="host-model"/>
...
is currently invalid, as hint-dedicated is only allowed if cpu mode
is host-passthrough or maximum. This restriction is unnecessary, see
https://bugzilla.redhat.com/show_bug.cgi?id=1857671
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Stay true to the name of the function and clear the pointer
after freeing it.
This also silences a bogus Coverity report about a double
free in qemuMonitorGetCPUInfo where qemuMonitorCPUInfoClear
is called right after allocating a new qemuMonitorCPUInfo
to fill out the non-zero defaults.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The comment and the caller assume virQEMUSaveDataNew only steals
domXML on success, but it is copied even on failure.
Also remove the misleading g_steal_pointer call on a local variable.
Reported by coverity.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The switch to g_auto left this one call behind.
Reported by Coverity.
Fixes: 4ab0d1844a
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Commit 76f4788932 made qemuNodeDeviceDetachFlags() unusable due to an
'if then else if' chain that will always results in a 'return -1',
regardless of 'driverName' input.
Found by Coverity.
Fixes: 76f4788932
Reported-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Just return when alias is null and Remove the 'ret' variable.
Signed-off-by: Yi Li <yili@winhong.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
This script works under two specific conditions. For each opened file,
search for all functions that has ACL calls and store them, and see
if there is a vir*DriverPtr struct declared in it. For each implementation
found, check if there is an ACL verification inside it, and error out if
none was found. The script also supports the concept of stub, where another
function takes the responsibility for the ACL call instead of the
original API.
Unfortunately this is not enough to cover the new scenario we have now,
with domain_driver.c containing helper functions that execute the ACL
calls. The script does not store state between files because, until now,
it wasn't needed to - APIs and stubs and vir*DriverPtr declarations were
always in the same file. Also, the script will not check for ACL in functions
that does not belong to a vir*DriverPtr interface. What we have now in
domain_driver.c breaks both assumptions: the functions are in a different
file, and there is no vir*DriverPtr being implemented in the file that
uses these functions.
This patch changes check-aclrules.py to accomodate this scenario. The helpers
that have ACL checks are stored beforehand in aclFuncHelpers, allowing other
files to use them to recognize a stub situation. In case the current file
being analyzed is domain_driver.c itself, we'll do a manual check using
aclFuncHelpers to verify that these functions indeed have ACL checks.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
libxlNodeDeviceDetachFlags() and qemuNodeDeviceDetachFlags() are mostly
equal, aside from how the virHostdevmanager pointer is retrieved and
the PCI stub driver used.
Now that the PCI stub driver verification is done early in both functions,
we can use the virDomainDriverNodeDeviceDetachFlags() helper to reduce
code duplication between them. 'driverName' is checked inside the helper
to set the appropriate stub driver.
The helper is named with the 'Flags' suffix, even when the helper itself
isn't receiving the flags from the callers, to be compliant with the
ACL function virNodeDeviceDetachFlagsEnsureACL() that is being called
inside it and was called from the original functions. Renaming the helper
would implicate in renaming REMOTE_PROC_NODE_DEVICE_DETACH_FLAGS, and all the
related structs inside remote_protocol.x, to be compliant with the ACL
rules.
This is not being checked at this moment, but we'll fix check-aclrules.py to
verify all the helpers that calls ACL functions in domain_driver.c shortly.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The validation of 'driverName' does not depend on any other state and can be
done right on the start of the function. We can fail earlier while avoiding
a cleanup jump.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The validation of 'driverName' does not depend on any other state and can be
done right on the start of the function. We can fail earlier while avoiding
a cleanup jump.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
libxlNodeDeviceReAttach() and qemuNodeDeviceReAttach() are mostly equal,
differing only how the virHostdevManager pointer is retrieved.
Put the common code into virDomainDriverNodeDeviceReAttach() to reduce
code duplication.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Next patch will use g_autoptr() with virNodeDevicePtr for cleanups.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
libxlNodeDeviceReset() and qemuNodeDeviceReset() are mostly equal,
differing only how the virHostdevManager pointer is retrieved.
Put the common code into virDomainDriverNodeDeviceReset() to reduce
code duplication.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Setting the system time backward would lead to a
multiplication overflow in function virKeepAliveStart.
The function virKeepAliveTimerInternal got the same bug too.
Backtrace below:
#0 0x0000ffffae898470 in raise () from /usr/lib64/libc.so.6
#1 0x0000ffffae89981c in abort () from /usr/lib64/libc.so.6
#2 0x0000ffffaf9a36a8 in __mulvsi3 () from /usr/lib64/libvirt.so.0
#3 0x0000ffffaf8fd9e8 in virKeepAliveStart (ka=0xaaaaf954ce10, interval=interval entry=0,
count=count entry=0) at ../../src/rpc/virkeepalive.c:283
#4 0x0000ffffaf908560 in virNetServerClientStartKeepAlive (client=0xaaaaf954cbe0)
at ../../src/rpc/virnetserverclient.c:1628
#5 0x0000aaaac57eb6dc in remoteDispatchConnectSupportsFeature (server=0xaaaaf95309d0,
msg=0xaaaaf9549d90, ret=0xffff8c007fc0, args=0xffff8c002e70, rerr=0xffff9ea054a0,
client=0xaaaaf954cbe0) at ../../src/remote/remote_daemon_dispatch.c:5063
#6 remoteDispatchConnectSupportsFeatureHelper (server=0xaaaaf95309d0, client=0xaaaaf954cbe0,
msg=0xaaaaf9549d90, rerr=0xffff9ea054a0, args=0xffff8c002e70, ret=0xffff8c007fc0)
at ./remote/remote_daemon_dispatch_stubs.h:3503
#7 0x0000ffffaf9053a4 in virNetServerProgramDispatchCall(msg=0xaaaaf9549d90, client=0xaaaaf954cbe0,
server=0x0, prog=0xaaaaf953a170) at ../../src/rpc/virnetserverprogram.c:451
#8 virNetServerProgramDispatch (prog=0xaaaaf953a170, server=0x0, server entry=0xaaaaf95309d0,
client=0xaaaaf954cbe0, msg=0xaaaaf9549d90) at ../../src/rpc/virnetserverprogram.c:306
#9 0x0000ffffaf90a6bc in virNetServerProcessMsg (msg=<optimized out>, prog=<optimized out>,
client=<optimized out>, srv=0xaaaaf95309d0) at ../../src/rpc/virnetserver.c:137
#10 virNetServerHandleJob (jobOpaque=0xaaaaf950df80, opaque=0xaaaaf95309d0)
at ../../src/rpc/virnetserver.c:154
#11 0x0000ffffaf812e14 in virThreadPoolWorker (opaque=<optimized out>)
at ../../src/util/virthreadpool.c:163
#12 0x0000ffffaf81237c in virThreadHelper (data=<optimized out>) at ../../src/util/virthread.c:246
#13 0x0000ffffaea327ac in ?? () from /usr/lib64/libpthread.so.0
#14 0x0000ffffae93747c in ?? () from /usr/lib64/libc.so.6
(gdb) frame 3
#3 0x0000ffffaf8fd9e8 in virKeepAliveStart (ka=0xaaaaf954ce10, interval=interval entry=0,
count=count entry=0) at ../../src/rpc/virkeepalive.c:283
283 timeout = ka->interval - delay;
(gdb) list
278 now = time(NULL);
279 delay = now - ka->lastPacketReceived; <='delay' got a negative value
280 if (delay > ka->interval)
281 timeout = 0;
282 else
283 timeout = ka->interval - delay;
284 ka->intervalStart = now - (ka->interval - timeout);
285 ka->timer = virEventAddTimeout(timeout * 1000, virKeepAliveTimer, <= multiplication overflow
286 ka, virObjectFreeCallback);
287 if (ka->timer < 0)
(gdb) p now
$2 = 18288001
(gdb) p ka->lastPacketReceived
$3 = 1609430405
Signed-off-by: BiaoXiang Ye <yebiaoxiang@huawei.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
All of these strings are allocated once, freed once, and are never
returned out of the function where they are declared.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
* src/util/virsocket.c (virSocketRecvFD): Set msg.msg_controllen as documented
in the man pages.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
According to meson.build the minimal version of curl needed is
7.18.0 which was released in January 2008. If the minimal version
is bumped to 7.19.1 (released in November 2008) we can drop some
workarounds because this newer version provides APIs we need.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
These are all cases when 1) the pointer is passed by reference from
the caller (ie.e. **) and expects it to be NULL on return if there is
an error, or 2) the variable holding the pointer is being checked or
re-used in the same function, but not right away.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
switching to g_autofree left many cleanup: sections empty.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Or when it will be immediately have a new value assigned to it.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
mimeType is initialized to NULL, and then only set in one place, just
before a check (not involving mimeType) that then VIR_FREEs mimeType
if it fails. If we just reorder the code to do the check prior to
setting mimeType, then there won't be any need to VIR_FREE(mimeType)
on failure (because it will already be empty/NULL).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
If we put the potential return string into the g_autofreed tmpResult,
and the move it to the returned "result" only as a final step ater, we
can avoid the need to explicitly VIR_FREE (or g_free) on failure.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Although the three functions esxFreePrivate(), esxFreeStreamPrivate(),
and esxUtil_FreeParsedUri() are calling VIR_FREE on *object, and so in
theory the caller of the function might rely on "object" (the free
function's arg) being set to NULL, in practice these functions are
only called from a couple places each, and in all cases the pointer
that is passed is a local variable, and goes out of scope almost
immediately after calling the Free function, so it is safe to change
VIR_FREE() into g_free().
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
volumeName was defined at the top of the function, then a new string
was assigned to it each time through a loop, but after the first
iteration of the loop, the previous string wasn't freed before
allocating a new string the next time. By reducing the scope of
volumeName to be just the loop, and making it g_autofree, we eliminate
the leak.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
These strings were being VIR_FREEd multiple times because they were
defined at the top of a function, but then set each time through a
loop. But they are only used inside that loop, so they can be
converted to use g_autofree if their definition is also placed inside
that loop.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
All of these strings are allocated once, freed once, and are never
returned out of the function where they are created, used, and are
freed.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
All callers are now using the on|off syntax, so yes|no is a unreachable
code path.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
QEMU has long accepted many different values for boolean properties, but
set accepted has been different depending on which QEMU parser you hit.
The on|off values were supported by all QEMU parsers. The yes|no, y|n,
true|false values were only partially supported:
https://lists.gnu.org/archive/html/qemu-devel/2020-11/msg01012.html
Thus we should standardize on on|off everywhere since that is most
widely supported in QEMU.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
QEMU has long accepted many different values for boolean properties, but
set accepted has been different depending on which QEMU parser you hit.
The on|off values were supported by all QEMU parsers. The yes|no, y|n,
true|false values were only partially supported:
https://lists.gnu.org/archive/html/qemu-devel/2020-11/msg01012.html
Thus we should standardize on on|off everywhere since that is most
widely supported in QEMU.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The preferred syntax for boolean options is to set the value "on" or
"off". QEMU 7.1.0 will deprecate the short format we currently use.
The long format has been supported with -vnc since the change to use
QemuOpts in 2.2.0, so we check based on the new capability flag.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This was introduced in QEMU 2.2.0, and is visible by -vnc appearing in
the "query-command-line-options" data.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
When virDomainGetFSInfo() is called over a QEMU/KVM domain it
results into calling of 'guest-get-fsinfo' guest agent command to
which it replies with info on guest (mounted) filesystems. When
filling return structure we also try to do basic lookup and
translate guest agent provided disk address into disk target (as
seen in domain XML). This can of course fail - guest can have
variety of disks not recorded in domain XML (iSCSI, scsi_debug,
NFS to name a few). If that's the case, a debug message is logged
and no disk target is added into the return structure.
However, due to the way our code is written the caller is led to
believe that the target was added into the structure. This may
lead to a situation where the array of disk targets (strings)
contains NULL. But our RPC structure says the array contains only
non-NULL strings. This results in somewhat 'cryptic' (at least to
users) error message:
error: Unable to get filesystem information
error: Unable to encode message payload
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1919783
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
After previous commit, the freeing of @info_ret inside of
virDomainFSInfoFormat() looks like this:
for () {
if (info_ret)
virDomainFSInfoFree(info_ret[i]);
}
It is needless to compare @info_ret against NULL in each
iteration. We can switch the order and do the comparison first
followed by the loop.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
When qemuDomainGetFSInfo() is called it calls
qemuDomainGetFSInfoAgent() which executes 'guest-get-fsinfo'
guest agent command, parses returned JSON and returns an array of
qemuAgentFSInfo structures (well, pointers to those structs).
Then it grabs a domain job and tries to do some matching of guest
returned info against domain definition. This matching is done in
virDomainFSInfoFormat() which also frees the array of
qemuAgentFSInfo structures allocated earlier.
But this is not just. If acquiring the domain job fails (or
domain activeness check executed right after that fails) then
virDomainFSInfoFormat() is not called, leaking the array of
structs.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
As the very first thing, this function checks whether the number
of items inside @agentinfo array is not negative. This is
redundant as the only caller - qemuDomainGetFSInfo() already
checked for that and would not even call this function if that
was the case.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The preferred syntax for boolean options is to set the value "on" or
"off". QEMU 7.1.0 will deprecate the short format we currently use.
The long format has been supported with -spice since at least 1.5.3,
so we don't need to check for it.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The preferred syntax for boolean options is to set the value "on" or
"off". QEMU 7.1.0 will deprecate the short format we currently use.
The long format has been supported with -chardev since at least 1.5.3,
so we don't need to check for it.
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The -2 value is misleading because if 'qemuAgentFSFreeze' fails it
doesn't necessarily mean that the command was sent to the agent.
Since callers don't care about the -2 value specifically, remove it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
If we didn't freeze any filesystems we should not even attempt thawing
them. Additionally 'guest-fsfreeze-freeze' fails if the filesystems are
already frozen, where thawing them may break users data integrity if
they used VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE accidentally after an
explicit virDomainFSFreeze and the next snapshot without that flag would
be taken with already thawed filesystems.
This effectively reverts 7c736bab06 .
Libvirt nowadays checks whether the guest agent is connected and pings
it before issuing an command so it's very unlikely that we'd end up in a
situation where qemuSnapshotCreateActiveExternal froze filesystems and
didn't thaw them.
Additionally we now discourage the use of
VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE since users have better control if
they freeze the FS themselves.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The flag creates additional points of failure which are hard to recover
from, such as when thawing of the filesystems fails after an otherwise
successful snapshot.
Encourage use of explicit virDomainFSFreeze/virDomainFSThaw.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Use g_autofree for 'dom_xml' to free it on some of the (unlikely) code
paths jumping to cleanup prior to the deallocation which is done right
after it's not needed any more since it's a big string.
Noticed when running under valgrind:
==2204780== 8,192 bytes in 1 blocks are definitely lost in loss record 2,539 of 2,551
==2204780== at 0x483BCE8: realloc (vg_replace_malloc.c:834)
==2204780== by 0x4D890DF: g_realloc (in /usr/lib64/libglib-2.0.so.0.6600.4)
==2204780== by 0x4DA3AF0: g_string_append_vprintf (in /usr/lib64/libglib-2.0.so.0.6600.4)
==2204780== by 0x4917293: virBufferAsprintf (virbuffer.c:307)
==2204780== by 0x49B0B75: virDomainChrDefFormat (domain_conf.c:26109)
==2204780== by 0x49E25EF: virDomainDefFormatInternalSetRootName (domain_conf.c:28956)
==2204780== by 0x15F81D24: qemuDomainDefFormatBufInternal (qemu_domain.c:6204)
==2204780== by 0x15F8270D: qemuDomainDefFormatXMLInternal (qemu_domain.c:6229)
==2204780== by 0x15F8270D: qemuDomainDefFormatLive (qemu_domain.c:6279)
==2204780== by 0x15FD8100: qemuMigrationSrcBeginPhase (qemu_migration.c:2395)
==2204780== by 0x15FE0F0D: qemuMigrationSrcPerformPeer2Peer3 (qemu_migration.c:4640)
==2204780== by 0x15FE0F0D: qemuMigrationSrcPerformPeer2Peer (qemu_migration.c:5093)
==2204780== by 0x15FE0F0D: qemuMigrationSrcPerformJob (qemu_migration.c:5168)
==2204780== by 0x15FE280E: qemuMigrationSrcPerform (qemu_migration.c:5372)
==2204780== by 0x15F9BA3D: qemuDomainMigratePerform3Params (qemu_driver.c:11841)
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
In one of my previous commits I've made an attempt to restore the
noqueue qdisc on a TAP corresponding to domain's <interface/> if
QoS is cleared out. The commit consisted of two almost identical
hunks. In both the pointer is dereferenced. But in one of them,
the pointer to new bandwidth can't be NULL while in the other it
can leading to a crash.
Fixes: d53b092353
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1919619
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Previous patches have converted VIR_FREE to g_free in functions with
names ending in Free() and Dispose(), but there are a few similar
functions with names that don't fit that pattern, but server the same
purpose (and thus can survive the same conversion). in particular
*Free*(), and *Unref().
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Invocations of the macro ESX_VI__TEMPLATE__FREE() will free the main
object (referenced as "item") that's pointing to all the things being
VIR_FREEd in the body, so it is safe for all the pointers in item to
just be g_freed rather that VIR_FREEd.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The root directory can be provided by user (or a temporary one is
generated) and is always formatted into connection URI for both
secret driver and QEMU driver, like this:
qemu:///embed?root=$root
But if it so happens that there is an URI unfriendly character in
root directory or path to it (say a space) then invalid URI is
formatted which results in unexpected results. We can trust
g_dir_make_tmp() to generate valid URI but we can't trust user.
Escape user provided root directory. Always.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1920400
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This API allows fetching a list of informational messages recorded
against the domain. This provides a way to give information about
tainting of the guest due to undesirable actions/configs, as well
as provide details of deprecated features.
The output of this API is explicitly targetted at humans, not
machines, so it is inappropriate to attempt to pattern match on
the strings and take action off them, not least because the messages
are marked for translation.
Should there be a demand for machine targetted information, this
would have to be addressed via a new API, and is not planned at
this point in time.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
These messages are only valid while the domain is running.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
These messages will be stored in the live status XML.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The <teaming> element in <interface> allows pairing two interfaces
together as a simple "failover bond" network device in a guest. One of
the devices is the "transient" interface - it will be preferred for
all network traffic when it is present, but may be removed when
necessary, in particular during migration, when traffic will instead
go through the other interface of the pair - the "persistent"
interface. As it happens, in the QEMU implementation of this teaming
pair (called "virtio failover" in QEMU) the transient interface is
always a host network device assigned to the guest using VFIO (aka
"hostdev"); the persistent interface is always an emulated virtio NIC.
When support was initially added for <teaming>, it was written to
require that the transient/hostdev device be defined using <interface
type='hostdev'>; this was done because the virtio failover
implementation in QEMU and the virtio guest driver demands that the
two interfaces in the pair have matching MAC addresses, and the only
way libvirt can guarantee the MAC address of a hostdev network device
is to use <interface type='hostdev'>, whose main purpose is to
configure the device's MAC address before handing the device to
QEMU. (note that <interface type='hostdev'> in turn requires that the
network device be an SRIOV VF (Virtual Function), as that is the only
type of network device whose MAC address we can set in a way that will
survive the device's driver init in the guest).
It has recently come up that some users are unable to use <teaming>
because they are running in a container environment where libvirt
doesn't have the necessary privileges or resources to set the VF's MAC
address (because setting the VF MAC is done via the same device's PF
(Physical Function), and the PF is not exposed to libvirt's container).
At the same time, these users *are* able to set the VF's MAC address
themselves in advance of staring up libvirt in the container. So they
could theoretically use the <teaming> feature if libvirt just skipped
the "setting the MAC address" part.
Fortunately, that is *exactly* the difference between <interface
type='hostdev'> (which must be a "hostdev VF") and <hostdev> (a "plain
hostdev" - it could be *any* PCI device; libvirt doesn't know what type
of PCI device it is, and doesn't care).
But what is still needed is for libvirt to provide a small bit of
information on the QEMU commandline argument for the hostdev, telling
QEMU that this device will be part of a team ("failover pair"), and
the id of the other device in the pair.
To make both of those goals simultaneously possible, this patch adds
support for the <teaming> element to plain <hostdev> - libvirt doesn't
try to set any MAC addresses, and QEMU gets the extra commandline
argument it needs)
(actually, this patch adds only the parsing/formatting of the
<teaming> element in <hostdev>. The next patch will actually wire that
into the qemu driver.)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In preparation for using the same element in two places, split the
parsing/formating for that subelement out of the virDomainNetDef
functions into their own functions.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
To make it easier to split out the parsing/formatting of the <teaming>
element into separate functions (so we can more easily add the
<teaming> element to <hostdev>, change its virDomainNetDef so that it
points to a virDomainNetTeamingInfo rather than containing one.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This struct was previously defined only within virDomainNetDef where
it was used, but I need to also use it in virDomainHostdevDef, so move
the internal struct out to its own "official" struct and give it the
standard typedef duo and *Free() function.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Previously we only checked MAC address and PCI address (or CCW
address). This is not enough information in cases where PCI address
isn't provided and multiple interfaces have the same MAC address (for
example, a virtio + hostdev "teaming" pair - their MAC addresses are
always the same).
Resolves: https://bugzilla.redhat.com/1926190
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
TPM devices with model='tpm-tis' are only valid with x86 and aarch64
virt machines. Add a check to qemuValidateDomainDeviceDefTPM() to
ensure VIR_DOMAIN_TPM_MODEL_TIS is only used with these architectures.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Starting a VM with swtpm device fails with qemu-system-aarch64.
E.g. with TPM device config
<tpm model='tpm-tis'>
<backend type='emulator' version='2.0'/>
</tpm>
QEMU reports the following error
error: internal error: process exited while connecting to monitor:
2021-02-07T05:15:35.378927Z qemu-system-aarch64: -device
tpm-tis,tpmdev=tpm-tpm0,id=tpm0: 'tpm-tis' is not a valid device model name
Indeed the TPM device name is 'tpm-tis-device' [1][2] for aarch64,
versus the shorter 'tpm-tis' for x86. The devices are the same from
a functional POV, i.e. they both emulate a TPM device conforming to
the TIS specification. Account for the unfortunate name difference
when building the TPM device option in qemuBuildTPMDevStr(). Also
include a test case for 'tpm-tis-device'.
[1] https://qemu.readthedocs.io/en/latest/specs/tpm.html
[2] c294ac327c
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Our implementation was inspired by glib anyways. The difference is only
the order of arguments.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Our implementation was heavily inspired by the glib version so it's a
drop-in replacement.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The glib implementation doesn't tolerate NULL but in most cases we check
before anyways. The rest of the callers adds a NULL check.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Don't re-calculate the string list length on every iteration. Convert
the loop to NULL-terminated iteration.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Some callers don't need to know the actual lenght of the list but only
care whether the required element is present or the list is non-empty.
Don't calculate the list length in those cases.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
'cells' can be pushed into the loop removing the need for manual
cleanup, the check whether 'line' is NULL inside of the loop is always
false since the loop checks it right before and 'line' variable is
unnecessary.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
All callers were converted to the glib alternative. Providing our own
just to have NULL tolerance doesn't make sense.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The glib variant doesn't accept NULL list, but there's just one caller
where it wasn't checked explicitly, thus there's no need for our own
wrapper.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use automatic memory freeing and remove the 'cleanup' label. Also make
it a bit more obvious that nothing happens if the 'old' list wasn't
present.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The caller doesn't care about the number of tokens so use the function
which doesn't return it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This is a uncommon and trivial operation, so having an utility function
for it is pointless.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Lookup the string with prefix locally so that we can remove the helper
which isn't universal at all.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
virStringListAdd hides the fact that a O(n) count of elements is
performed every time it's called which makes it inefficient.
Stop supporting such semantics and remove the helpers. Users have a
choice of using GSList or an array with a counter variable rather than
repeated lookups.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Precalculate the lenght to avoid use of 'virStringListAdd' in a loop.
The code is also simplified by using APIs which don't return errors.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since adding and removing is the main use case for the macmap module,
convert the code to a more efficient data structure.
The refactor also optimizes the loading from file where previously we'd
do a hash lookup + list lenght calculation for every entry.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The conversion removes the use of virStringListAdd/virStringListRemove
which try to add dynamic properties to a string list which is really
inefficient.
Storing the dbus VMState ids in a GSList is pretty straightforward and
the slightly increased complexity of the code will be paid back by
removing the string list helpers later.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The iner loop copies the 'resources' array multiple times using
'virStringListAdd' which has O(n^2) complexity.
Pre-calculate the length so we can allocate the array upfront and just
copy the strings in the loop.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Pre-allocate a buffer for the upper limit and shrink it afterwards to
avoid use of 'virStringListAdd' in a loop.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Pre-allocate the list to the upper bound and fill it gradually. Since
the data is kept long-term and the list won't be populated much shrink
it to the actual size after parsing.
While using 'virStringListAdd' here wouldn't be as expensive as this
function is used just once, the removal will allow to remove
'virStringListAdd' altogether to discourage the antipattern it promotes.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
We already know the upper bound of items we might need so we can
allocate the array upfront and avoid the quadratic complexity of
'virStringListAdd'.
In this instance the returned data is kept only temporarily so a
potential unused space due to filtered-out entries doesn't impose a
long-term burden on memory.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
'virHashGetItems' already returns the number of entries which will be
considered for addition to the list so we can allocate it to the upper
bound upfront rather than growing it in a loop. This avoids the
quadratic complexity of 'virStringListAdd'.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
'virStringListAdd' calculates the string list length on every invocation
so constructing a string list using it results in O(n^2) complexity.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
'virStringListAdd' calculates the string list length on every invocation
so constructing a string list using it results in O(n^2) complexity.
Use a GSList which has cheap insertion and iteration and doesn't need
failure handling.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
glib's 'g_autoslist()' doesn't support lists of 'char *' strings. Add a
type alias 'virGSListString' so that we can register an 'autoptr'
function for it for simple usage of GSList with strings.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Some code paths return -1 directly while others jump to 'cleanup' which
cleans the list of mounts. Since qemuDomainGetPreservedMounts now
returns a NULL-terminated list, convert devMountsPath to g_auto(GStrv)
and remove the cleanup altoghether.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
'i' is used in both outer and inner loop. Since 'devMountsPath' is now a
NULL-terminated list, we can use a GStrv to iterate it;
Additionally rewrite the conditional of adding to the 'unlinkPaths'
array so that it's more clear what's happening.
Fixes: 5c86fbb72d
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Refactor the handling of internals so that NULL-terminated lists are
always returned.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In commit 88957116c9 I've adapted
libvirt to QEMU's deprecation of -mem-path and -mem-prealloc and
switched to memory-backend-* even for system memory. My claim was
that that's what QEMU does under the hood anyway. And indeed it
was: see QEMU commit 900c0ba373aada4c13d47d95330aa72ec4067ba5 and
look at function create_default_memdev().
However, then commit d96c4d5f193e0e45beec80a6277728b32875bddb was
merged into QEMU. While it was fixing a bug, it also changed the
create_default_memdev() function in which it started turning off
use of canonical path (by setting
"x-use-canonical-path-for-ramblock-id" attribute to false). This
wasn't documented until QEMU commit
8db0b20415c129cf5e577a593a4a0372d90b7cc9. The path affects
migration - the same path has to be used on the source and on the
destination. Therefore, if there is old guest started with '-m X'
it has "pc.ram" block which doesn't use canonical path and thus
when migrating to newer QEMU which uses memory-backend-* we have
to turn off the canonical path explicitly. Otherwise,
"/objects/pc.ram" path would be expected by QEMU which doesn't
match the source.
Ideally, we would need to set it only for some machine types
(4.0 and older) because newer machine types already do what we
are doing. However, we treat machine types as opaque strings and
therefore we don't want to parse nor inspect their versions. But
then again, newer machine types already do what we are doing in
this commit, so when old machine types are deprecated and removed
we can remove our hack and forget it ever happened.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1912201
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This capability tracks whether memory-backend-file has
"x-use-canonical-path-for-ramblock-id" attribute. Introduced into
QEMU by commit fa0cb34d2210cc749b9a70db99bb41c56ad20831. As of
QEMU commit 8db0b20415c129cf5e577a593a4a0372d90b7cc9 the property
is considered stable by qemu despite the 'x-' prefix to preserve
compatibility with released qemu versions.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The 'conflict' key in a virt_daemon_unit dictionary is not used when
generating systemd service and socket files. The comment associated
with the key claims the default is 'true', and a few build files
needlessly set it to 'true' when defining their virt_daemon_unit.
Remove the 'conflict' key and its use in the affect build files.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When running on host with systemd we register VMs with machined.
In this case systemd creates the root VM cgroup for us. This has some
implications where one of them is that systemd owns all files inside
the root VM cgroup and we should not touch them.
We already use DBus calls for some of the APIs but for the remaining
ones we will continue accessing the files directly. Systemd doesn't
support threaded cgroups so we need to do this.
The reason why we don't use DBus for most of the APIs is that we already
have a code that works with files and we would have to check if systemd
supports each API.
This change introduces new topology on systemd hosts:
$ROOT
|
+- machine.slice
|
+- machine-qemu\x2d1\x2dvm1.scope
|
+- libvirt
|
+- emulator
+- vcpu0
+- vcpu0
compared to the previous topology:
$ROOT
|
+- machine.slice
|
+- machine-qemu\x2d1\x2dvm1.scope
|
+- emulator
+- vcpu0
+- vcpu0
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This will check if the cgroup actually exists on the system.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When we create a new child cgroup and the parent cgroup has any process
attached to it enabling controllers for the child cgroup fails with
error. We need to move the process into the child cgroup first before
enabling any controllers.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Remove one level of indentation by splitting the condition.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When running on host with systemd we register VMs with machined.
In this case systemd creates the root VM cgroup for us. This has some
implications where one of them is that systemd owns all files inside
the root VM cgroup and we should not touch them.
If we change any value in file that systemd knows about it will be
changed to what systemd thinks it should be when executing
`systemctl daemon-reload`.
These are the APIs that we need to call using systemd because they set
limits that are proportional to sibling cgroups.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The "max" model can be treated the same way as "host" model in general.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This is a special CPU model similar to "-cpu host", so won't use our
normal CPU model detection logic.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The logic applied in the ppc64 case isn't quite correct, as the
interpretation of maximum mode depends on whether hardware virt
is used or not. This is information the CPU driver doesn't have.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The data reported is the same as for "host-passthrough"
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
For hardware virtualization this is functionally identical to the
existing host-passthrough mode so the same caveats apply.
For emulated guest this exposes the maximum featureset supported by
the emulator. Note that despite being emulated this is not guaranteed
to be migration safe, especially if different emulator software versions
are used on each host.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The @vhostuser member of virStorageSource structure is allocated
during parsing in virDomainDiskSourceVHostUserParse() but never
freed leading to a memleak. Since the member is an object it has
to be unrefed instead of g_free()-d.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
There are few cases where STREQLEN() is called like this:
STREQLEN(var, string, strlen(string))
which is the same as STRPREFIX(var, string). Use STRPREFIX()
because it is more obvious what the check is doing.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
A <machine/> element can have "deprecated" attribute that
corresponds to 'deprecated' member of _virQEMUCapsMachineType
struct. But the member is of boolean type. Therefore, the string
returned by virXMLPropString() must be freed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
If parsing "maxCpus" attribute of <machine/> element fails an
error is printed but the corresponding string is not freed. While
it is very unlikely to happen (parsed XML is not user provided
and we are the ones generating it), it is possible. Instead of
freeing the variable in the error path explicitly, let's declare
it as g_autofree. And while I'm at it, let's bring it into the
loop where it's used.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The various virtproxyd socket files are generated with invalid syntax,
e.g. from virtproxyd.socket
[Unit]
Description=Libvirt proxy local socket
Before=virtproxyd.service
libvirtd.socket libvirtd-ro.socket libvirtd-admin.socket libvirtd-tcp.socket libvirtd-tls.socket
Note the missing 'Conflicts=' in the last line. Fix it by prepending
'Conflicts=' to libvirtd_socket_conflicts when adding virtproxyd
to virt_daemon_units.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
On platforms that lack both getauxval() and elf_aux_info(),
such as OpenBSD and macOS, host CPU detection can't work.
https://gitlab.com/libvirt/libvirt/-/issues/121
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
No need to fetch the same information twice.
As a side effect, this solves a bug where, on platforms where
elf_aux_info() is used instead of getauxval(), we would not
make sure the CPUID feature is available before attempting to
use it.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
This header is not present on several non-Linux targets that
nonetheless support aarch64.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
A few commits back I've introduced new 'virtio-pmem' <memory/>
device. Since it's virtio it goes onto PCI bus. Therefore, on
hotplug new PCI address is generated (or provided one is
reserved). However, if hotplug fails (for whatever reason) the
address needs to be released. This is different to 'dimm' type of
address because for that type we don't keep a map of used slots
rather generate one on each address assign request. The map is
then thrown away. But for PCI addresses we keep internal state
and thus has to keep it updated. Therefore, this new
qemuDomainReleaseMemoryDeviceSlot() function is NOP for those
models which use 'dimm' address type ('dimm' and 'nvdimm').
While I'm at it, let's release the address in case of hot unplug.
Not that is supported (any such attempt fails with the following
error:
"virtio based memory devices cannot be unplugged"
But if QEMU ever implements hot unplug then we don't have to
remember to fix our code.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Currently, nmdm console device requires user to specify master and slave
path attributes (such as /dev/nmdm0A and /dev/nmdm0B respectively).
However, making user find a non-occupied device name might be not
convenient, especially for the remote connections.
Update the logic to make these attributes optional. In case if not
specified, use /dev/nmdm$UUID[AB], where $UUID is a domain's UUID.
With this schema it's unlikely nmdm device will clash with other domains
or even other non-bhyve nmdm devices.
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
All of these options are actually supported by vhostuser disk so
we should allow them to be usable.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Currently, requesting domain capabilities fails when the specified
emulator binary does not equal to "/usr/sbin/bhyve". As we're
not using user-specified emulator anyway, drop this check to avoid
showing errors for values like "bhyve" (without absolute path).
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Get rid of the 'need_release' variable. The code can be rewritten
so that it is not needed.
Signed-off-by: Yi Li <yili@winhong.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When deleting the vhostuserclient interface, OVS prompts that the interface does not exist,
Through the XML file, I found that the "target dev" has a '\n', results in an XML parsing error.
XML file:
<target dev='vm-20ac9c030a47
'/>
That is because 'ovs-vsctl' returns a newline result, always come with a '\n',
and the vircommandrun function puts it in ifname.
So virNetDevOpenvswitchGetVhostuserIfname should remove '\n' from ifname.
Signed-off-by: Yalei Li <liyl43@chinatelecom.cn>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This function is only called from one place, and has, well... not a
*misleading* name, but it doesn't fit the standard frame of functions
that end in "Free" (it doesn't actually free the object pointed to by
its argument, but frees *some parts* of the content of the object).
Rather than try to think up an appropriate name, let's just move the
meat of this function into its one and only caller,
virNetLibsshSessionDispose(), which will allow us to convert its
VIR_FREEs into g_free in a future patch.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
virDomainCapsDispose() was the only caller of
virDomainCapsStringValuesFree(), which 1) didn't actually free the
object it was called with, but only cleared it, making it less
mechanical to convert from VIR_FREE to g_free (since it's not
immediately obvious from looking at virDomainCapsStringValuesFree()
that the pointers being cleared will never again be used).
We could have renamed the function to virDomainCapsStringValuesClear()
to side-step the confusion of what the function actually does, but
that would just make the upcoming switch from VIR_FREE to g_free
require more thought. But since there is only a single caller to the
function, and it is a vir*Dispose() function (indicating that the
object containing the virDomainCapsStringValues is going to be freed
immediately after the function finishes), and thus VIR_FREE() *could*
be safely replaced by g_free()), we instead just move the contents of
virDomainCapsStringValuesFree() into virDomainCapsDispose() (and
*that* function will be trivially converted in an upcoming
"mechanical" patch).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This is another *Free() function that doesn't free the object it is
passed. Instead it frees and clears some parts of the object.
In this case, the function is actually called from two places, and one
of them (virNetSSHSessionAuthReset) appears to be assuming that the
pointers actually *will* be cleared. So the proper thing to do here
(?) is to rename the function to virNetSSHSesionAuthMethodsClear().
(NB: virNetSSHSessionAuthReset is seemingly never called from
anywhere. Is this one of those functions that actually *is* called by
some strange MACRO invocation? Or it is truly one of those
"written-but-never-used" functions that can be deleted? (if the latter
is the case, then I would rather move the contents of
virNetSessionAuthMethodsFree() into its only other caller,
virNetSSHSessionDispose(), so that the VIR_FREEs could be replaced
with g_free.)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
These functions are all only called as a part of qemuFirmwareFree(),
which frees the qemuFirmware object before return, so we can be sure
none of the pointers is referenced after freeing (and thus there is no
need to clear any of them).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
These functions all cooperate to free memory pointed to by a single
object that contains (doesn't *point to*, but actually contains)
several sub-objects. They were written to send copies of these
sub-objects to subordinate functions, rather than just sending
pointers to the sub-objects.
Let's change these functions to just send pointers to the objects
they're cleaning out rather than all the wasteful and pointless
copying.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Several functions had the names virFirmware[something]Free(), but they
aren't taking a pointer to some object and freeing it. Instead, they
are making a copy of the content of an entire object, then Freeing the
objects pointed to by that content.
As a first step in a too-complicated cleanup just to eliminate a few
occurrences of VIR_FREE(), this patch renames those functions to more
accurately reflect what they do - they Free the *Content* of their
arguments.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
dhcpHostFree() and addnHostFree() don't follow the normal pattern of
*Free functions in the rest of libvirt code - they are actually more
similar to the *Dispose() functions, in that they free all subordinate
objects, but not the object pointed to by the argument
itself. However, the arguments aren't virObjects, so it wouldn't be
proper to name them *Dispose() either.
They *currently* behave similar to a *Clear() function, in that they
free all the subordinate objects and nullify the pointers of those
objects. HOWEVER, we don't actually need or want that behavior - the
two functions in question are only called as part of a higher level
*Free() function, and the pointers are not referenced in any way
between the time they are freed and when the parent object is freed.
So, since the current name isn't correct, nor is *Dispose(), and we
want to change the behavior in such a way that *Clear() also wouldn't
be correct, lets name the functions *FreeContent(), which is an
accurate description of what the functions do, and what we *want* them
to do.
And since it's such a small patch, we can go ahead and change that
behavior - replacing the VIR_FREEs with g_free.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Commit <318d807a0bd3372b634d1952b559c5c627ccfa5b> added a fix to skip
most of the block stat code to not log error message for missing storage
sources but forgot to increase the recordnr counter.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The correct backend type is 'vc', same as in qemuBuildChrChardevStr()
where we generate qemu command line.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
A memory leak was identified in
virCgroupEnableMissingControllers():
==11680== at 0x483EAE5: calloc (vg_replace_malloc.c:760)
==11680== by 0x4E51780: g_malloc0 (in /usr/lib64/libglib-2.0.so.0.6701.0)
==11680== by 0x4908618: virCgroupNew (vircgroup.c:701)
==11680== by 0x49096F4: virCgroupEnableMissingControllers (vircgroup.c:1146)
==11680== by 0x4909B17: virCgroupNewMachineSystemd (vircgroup.c:1228)
==11680== by 0x4909E94: virCgroupNewMachine (vircgroup.c:1313)
==11680== by 0x1694FDBC: qemuInitCgroup (qemu_cgroup.c:946)
==11680== by 0x1695046B: qemuSetupCgroup (qemu_cgroup.c:1083)
==11680== by 0x16A60126: qemuProcessLaunch (qemu_process.c:7077)
==11680== by 0x16A61504: qemuProcessStart (qemu_process.c:7384)
==11680== by 0x169B84C2: qemuDomainObjStart (qemu_driver.c:6590)
==11680== by 0x169B8776: qemuDomainCreateWithFlags (qemu_driver.c:6641)
What happens is that new virCgroup is created and stored into
@parent. Then, if @tokens is not empty the for() loop is entered
into where another virCgroup is created and @parent is replaced
with this new virCgroup. But nothing freed the old @parent.
Fixes: 77291414c7
Reported-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Implements QEMU support for vhost-user-blk together with live
hotplug/unplug.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Make the function reusable by other vhost-user based devices.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Hypervisors are capable of reporting that some features are deprecated.
This should be used to mark a domain as tainted.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
QEMU has the ability to mark machine types as deprecated. This should be
exposed to management applications in the capabilities.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
QEMU has the ability to mark CPUs as deprecated. This should be exposed
to management applications in the domain capabilities.
This attribute is only set when the model is actually deprecated.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The use case VIR_ALLOC_VAR deals with is very unlikely. We had just 2
legitimate uses, which were reimplemented locally using g_malloc0 and
sizeof instead as they used a static number of members of the trailing
array.
Remove VIR_ALLOC_VAR since in most cases the direct implementation is
shorter and clearer and there are no users of it currently.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In this case we need a 'struct ethtool_gfeatures' followed by two
'struct ethtool_get_features_block' so there's no risk of overflow.
Use g_malloc0 and sizeof() to allocate the memory instead of
VIR_ALLOC_VAR.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In both cases we need memory for a 'struct sanlk_resource' followed by
one 'struct sanlk_disk', thus there's no risk of overflow.
Use g_malloc0 and sizeof() to allocate the memory instead of
VIR_ALLOC_VAR.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Use g_autofree to allow removal of 'cleanup:' and the 'ret' variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Use g_autofree and remove the 'cleanup' section and 'ret' variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Switch to the more common approach of having arrays allocated separately
rather than trailing the struct.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Users were replaced with virSecureEraseString with explicit freeing of
the memory.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
There are no users any more. The replacement is to use g_auto and
virSecureEraseString explicitly.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In this instance attempting to be correct is really pointless since the
secret is formatted into another string which is not erased securely and
then put on the commandline.
Keep the secure handling for correctness.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The macros are unused now and callers who care about clearing the memory
they use should use memset() appropriately.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Clear out the value using virSecureErase and free it with g_free so
that VIR_DISPOSE_N can be phased out.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Clear the key and IV structs using virSecureErase.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Clear out the value using virSecureErase and free it with g_free so
that VIR_DISPOSE_N can be phased out.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Switch the secret value to 'g_autofree' for handling of the memory and
clear it out using virSecureErase.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Phase out use of VIR_DISPOSE_N from the qemu driver. Use memset in the
appropriate cases.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Clear the secret right after use with virSecureErase.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The code pretends that it cares about clearing the secret values, but
passes the secret value to a realloc, which may copy the value somewhere
else and doesn't sanitize the original location when it does so.
Since we want to construct a string from the value, let's copy it to a
new piece of memory which has the space for the 'NUL' byte ourselves, to
prevent a random realloc keeping the data around.
While at it, use virSecureErase instead of VIR_DISPOSE_N since it's
being phased out.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The module will provide functions for disposing secrets stored in
memory.
Note that for now it's implemented using memset, which is not really
secure.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Shuffle the code around to remove the need for temporary variables and
labels for cleaning them.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The check whether @keyfile is non-NULL is before locking @sess, but uses
the 'error' label which unlocks '@sess'.
While touching the error path, update the error message to be on one
line.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When virRandomBytes fails we don't get any random bytes and even if we
did they don't have to be treated as secret as they weren't used in any
way.
Add a temporary variable with automatic freeing for the secret buffer
and assign it only on success.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The list isn't secret which would need being disposed of. Just expand
the array and return failure when adding the NULL terminator similarly
to how we expand the list for adding devices in a loop.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The struct doesn't contain any secrets to clear before freeing and even
if it did VIR_DISPOSE_N wouldn't help as the struct contains only
pointers thus the actual memory pointing to isn't sanitized.
Just free the params array pointer and then the struct itself.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Pass the parameter clock rt to qemu to ensure that the
virtual machine is not synchronized with the host time
Signed-off-by: gongwei <gongwei@smartx.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The headers weren't removed after use of VIR_STRDUP was removed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
"f + 0.5" does not round correctly for values very close to
".5" for every integer multiple, e.g. "0.499999975".
Found by clang-tidy's "bugprone-incorrect-roundings" check.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
`udevGetIntSysfsAttr` does not necessarily write to the third parameter,
even when it returns 0.
This was found by clang-tidy's
"clang-analyzer-core.UndefinedBinaryOperatorResult" check.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This was found by clang-tidy's
"clang-analyzer-security.insecureAPI.bzero" check.
bzero is marked as deprecated ("LEGACY") in POSIX.1-2001 and
removed in POSIX.1-2008.
Besides its deprecation, bzero can be unsafe to use under certain
circumstances, e.g. when used to zero-out memory containing secrects.
These calls can be optimized away by the compiler, if it concludes no
further access happens to the memory, thus leaving the secrets still
in memory. Hence its classification as "insecureAPI".
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This was found by clang-tidy's "readability-misleading-indentation"
check.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This was found by clang-tidy's "readability-misleading-indentation"
check.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This section is guarded by "#ifndef WIN32" in line 2109--2808.
Found by clang-tidy's "readability-redundant-preprocessor" check.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Co-authored-by: Sri Ramanujam <sramanujam@datto.com>
Signed-off-by: Matt Coleman <matt@datto.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This patch takes on one set of examples of unnecessary use of
VIR_FREE() when g_free() is adequate - it modifies only vir*Free()
functions within the conf directory that take a single pointer and
free the object pointed to by that argument before returning. The
modification is to replace VIR_FREE() with g_free() for the object
itself *and* for all subordinate chunks of memory pointed to by that
object.
(NB: there are other functions that VIR_FREE subordinate memory of
objects that end up being freed before return (also sometimes with
VIR_FREE); I am purposefully ignoring those to reduce scope and focus
on a sub class where the pointlessness is obvious.)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
usually a function call vir*Free() will take a single pointer to an
object as its argument, and will then free all resources associated
with that object, including the object
itself. virStorageEnctyptionInfoDefFree() doesn't do that - it frees
all the subordinate resources of the ojbect, but doesn't free the
object itself; usually a function like that is called
vir*Clear(). Let's rename this function to not be misleading.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There is no point in setting the interface model to unknown during
virDomainNetDefFree(), since we are about to free the object anyway
(and the model isn't used anywhere in the rest of the function).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The memory containing the pointer is going to be freed momentarily anyway.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This function clears out and frees a virDomainZPCIAddressIds object,
so that's that's what it should take as its argument, *not* the
pointer to a parent object that contains the object we want to free.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Back in commit 2c71d3826, which appeared in libvirt-1.2.3 in April
2014, the location used to store saved MAC addresses and vlan tags of
SRIOV VFs was changed from /var/run/libvirt/qemu to
/var/run/libvirt/hostdevmgr. For backward compatibility the code was
made to continue looking in the old location for the files when it
didn't find them in the new location.
It's now been 6 years, and even if there was somebody still running
libvirt-1.2.3 on their system, that system would now be out of support
for libvirt, so there would be no way for them to upgrade to a new
libvirt that no longer looks in "oldStateDir" for the files. So
let's no longer look in "oldStateDir" for the files!
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
virGetConnectNetwork() calls
virGetConnectGeneric(), which calls
virConnecCacheInitialize(), which is actually a call (only once) to
virConnectCacheOnceInit() which calls
virThreadLocalInit() several times, which calls
pthread_key_create()
If pthread_key_create() fails, it (of course) doesn't log an error
(because it's not a part of libvirt), nor does any other function on
the call chain all the way up to virGetConnectNetwork(). But none of
the callers of virGetConnectNetwork() log an error either, so it is
possible that an API could fail due to virGetConnectNetwork() failing,
but would only log "an error was encountered, but the cause is
unknown. Deal with it." (paraphrasing).
(In all likelyhood, virConnectCacheOnceInit() is going to be called at
some earlier time, and almost certainly pthread_key_create() will
never fail (and if it does, the user will have *much* bigger problems
than an obtuse error message from libvirt)).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
posix_fallocate() might be not supported by a filesystem, for example,
it's not supported by ZFS. In that case it fails with
return code 22 (EINVAL), and thus safezero_posix_fallocate() returns -1.
As safezero_posix_fallocate() is the first function tried by safezero()
and it tries other functions only when it returns -2, it fails
immediately without falling back to other methods, such as
safezero_slow().
Fix that by returning -2 if posix_fallocate() returns EINVAL, to give
safezero() a chance to try other functions.
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The current virPCIDeviceNew() signature, receiving 4 uints in sequence
(domain, bus, slot, function), is not neat.
We already have a way to represent a PCI address in virPCIDeviceAddress
that is used in the code. Aside from the test files, most of
virPCIDeviceNew() callers have access to a virPCIDeviceAddress reference,
but then we need to retrieve the 4 required uints (addr.domain, addr.bus,
addr.slot, addr.function) to satisfy virPCIDeviceNew(). The result is
that we have extra verbosity/boilerplate to retrieve an information that
is already available in virPCIDeviceAddress.
A better way is presented by virNVMEDeviceNew(), where the caller just
supplies a virPCIDeviceAddress pointer and the function handles the
details internally.
This patch changes virPCIDeviceNew() to receive a virPCIDeviceAddress
pointer instead of 4 uints.
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Instead of receiving 4 uints in order and write domain/bus/slot/function,
receive a virPCIDeviceAddressPtr instead and write into it.
This change will allow us to simplify the API for virPCIDeviceNew()
in the next patch.
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
libxlNodeDeviceGetPCIInfo() and qemuNodeDeviceGetPCIInfo() are equal.
Let's move the logic to a new virDomainDriverNodeDeviceGetPCIInfo()
info to be used by libxl_driver.c and qemu_driver.c.
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
There is no need to open code the PCI address string format
when we have a function that does exactly that.
Reviewed-by: Laine Stump <laine@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Further testing revealed commit f035f53baa regresses Debian bug 955216
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955216
Restarting libvirt-guests on libvirtd restart is worse than the original
dependency issue, so revert the commit until a better solution is found.
This reverts commit f035f53baa.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Wire up the QEMU command line for this option.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Rename virDomainCheckVirtioOptions into
virDomainCheckVirtioOptionsAreAbsent since it checks if all
virtio options are absent. The old name was very misleading.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Add virtio related options iommu, ats and packed as driver element attributes
to vsock devices. Ex:
<vsock model='virtio'>
<cid auto='no' address='3'/>
<driver iommu='on'/>
</vsock>
Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The virDomainVirtioOptionsCheckABIStability() function is called
from various ABI stability check functions. Every caller checks
if both old and new definitions have virtio options set and only
after that they call the function. This is suboptimal because:
a) this check can be done in the function itself (making all
callers shorter),
b) is inherently wrong, because it doesn't catch case where one
definition has virtio options set and the other doesn't.
Do proper checks at the beginning of the function and simplify
its calls.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The previous commit rendered this function empty and needless.
Remove it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The aim of virDomainCheckVirtioOptions() function is to check
whether no virtio options are set, i.e. no @iommu no @ats and no
@packed attributes were present in given device's XML (yeah, the
function has very misleading name). Nevertheless, this kind of
check belongs to validation phase, but now is done in post parse
phase. Move the function and its calls to domain_validate.c so
that future code is not tempted to repeat this mistake.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The qemuDomainObjFromDomain() API must be paired with
the virDomainObjEndAPI API. The qemuDomainAuthorizedSSHKeysGet
method simply did 'return -1' leaking a reference and lock
in two paths.
The qemuDomainAuthorizedSSHKeysSet method marked the object
as an autoptr while also have some code paths that will call
virDomainObjEndAPI. As a result the object will be released
but not unlocked in error paths.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
If QEMU driver fails to initialize for whatever reason (it can be
as trivial as a typo on qemu.conf), the control jumps to error
label in qemuStateInitialize() where qemuStateCleanup() is called
which frees the driver. But the daemon then asks drivers to
prepare for shutdown, which in case of QEMU driver is implemented
in qemuStateShutdownPrepare(). In here, the driver is
dereferenced but since it was freed earlier, the pointer is NULL
which leads to instant crash.
Solution is simple - just check if qemu_driver is not NULL. But
doing so only in qemuStateShutdownPrepare() would push the
problem down to virStateShutdownWait(), well
qemuStateShutdownWait(). Therefore, duplicate the trick there
too.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1895359#c14
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
All callers of this function called virStorageFileParseChainIndex
before. Internalize the logic of that function to prevent multiple calls
and passing around unnecessary temporary variables.
This is achieved by calling virStorageFileParseBackingStoreStr and using
it to fill the values internally.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
A terminated chain has a virStorageSource with type ==
VIR_STORAGE_TYPE_NONE at the end. Since virStorageSourceHasBacking
is explicitly returning false in that case we'd probe the chain
needlessly. Just check whether src->backingStore is non-NULL.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
'virDomainDiskGetSource' returns src->path effectively. Checking whether
a disk is empty is done via 'virStorageSourceIsEmpty'.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Use g_autoptr for the hash table and remove the 'ret' variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
The parsers for the backing store strings are relatively self-contained
and rather massive piece of code. Move them to a new module called
storage_source_backingstore.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
There are no other files using it. Move it and make the functions
static.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Rename the function to virStorageSourceFetchRelativeBackingPath and
return relative paths only. The function is only used to restore the
relative relationship between images so there's no need for it to be
universal.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Move it together with virStorageSourceGetRelativeBackingPath which is
the main reason why it exists. Upcoming patch will modify the comment
and arguments refering to virStorageSourceGetRelativeBackingPath so it's
better if they are together.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
As explained in QEMU commit 4c257911dcc7c4189768e9651755c849ce9db4e8
intel-pt features should never be included in the CPU models as it was
not supported by KVM back then and even once it started to be supported,
users have to enable it by passing pt_mode=1 parameter to kvm_intel
module. The Icelake-* CPU models with intel-pt included were added to
QEMU 3.1.0 and removed right in the following 4.0.0 release (and even in
3.1.1 maintenance release).
In libvirt 6.10.0 I introduced 'removed' attribute for features included
in our CPU model definitions which we can use to drop intel-pt from
Icelake-* CPU models. Back then I explained we can safely do so only for
features which could never be enabled, which is not the case of intel-pt.
Theoretically, it could be possible to create an environment in which
QEMU would enable intel-pt without asking for it explicitly: it would
need to use a new enough kernel (not available at the time of QEMU
3.1.0) and pt_mode KVM parameter in combination with QEMU 3.1.0 running
a domain with q35 machine type and all that on a CPU which didn't really
exist at that time.
Migrating such domain to a host with newer SW stack including libvirt
with this patch applied would result in incompatible guest ABI (the
virtual CPU would lose intel-pt). However, QEMU changed its CPU models
unconditionally and thus migration would not work even without this
patch. That said, it is safe to follow QEMU and remove the feature from
Icelake-* CPU models in our cpu_map.
https://bugzilla.redhat.com/show_bug.cgi?id=1853972
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
dtrace invokes the C compiler, so when cross-building we need
to make sure that $CC is set in the environment and that it
points to the cross-compiler rather than the native one.
Until https://github.com/mesonbuild/meson/issues/266
is addressed, the workaround is to call dtrace via env(1).
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=980334
Signed-off-by: Helmut Grohne <helmut@subdivi.de>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
virPCIGetNetName is used to get the name of the netdev associated with
a particular PCI device. This is used when we have a VF name, but need
the PF name in order to send a netlink command (e.g. in order to
get/set the MAC address of the VF).
In simple cases there is a single netdev associated with any PCI
device, so it is easy to figure out the PF netdev for a VF - just look
for the PCI device that has the VF listed in its "virtfns" directory;
the only name in the "net" subdirectory of that PCI device's sysfs
directory is the PF netdev that is upstream of the VF in question.
In some cases there can be more than one netdev in a PCI device's net
directory though. In the past, the only case of this was for SR-IOV
NICs that could have multiple PF's per PCI device. In this case, all
PF netdevs associated with a PCI address would be listed in the "net"
subdirectory of the PCI device's directory in sysfs. At the same time,
all VF netdevs and all PF netdevs have a phys_port_id in their sysfs,
so the way to learn the correct PF netdev for a particular VF netdev
is to search through the list of devices in the net subdirectory of
the PF's PCI device, looking for the one netdev with a "phys_port_id"
matching that of the VF netdev.
But starting in kernel 5.8, the NVIDIA Mellanox driver began linking
the VFs' representor netdevs to the PF PCI address [1], and so the VF
representor netdevs would also show up in the net
subdirectory. However, all of the devices that do so also only have a
single PF netdev for any given PCI address.
This means that the net directory of the PCI device can still hold
multiple net devices, but only one of them will be the PF netdev (the
others are VF representors):
$ ls '/sys/bus/pci/devices/0000:82:00.0/net'
ens1f0 eth0 eth1
In this case the way to find the PF device is to look at the
"phys_port_name" attribute of each netdev in sysfs. All PF devices
have a phys_port_name matching a particular regex
(p[0-9]+$)|(p[0-9]+s[0-9]+$)
Since there can only be one PF in the entire list of devices, once we
match that regex, we've found the PF netdev.
[1] - https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/
commit/?id=123f0f53dd64b67e34142485fe866a8a581f12f1
Co-Authored-by: Moshe Levi <moshele@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Adrian Chiris <adrianc@nvidia.com>
Reviewed-by: Laine Stump <laine@redhat.com>
This commit add virNetDevGetPhysPortName to read netdevice
phys_port_name from sysfs. It also refactor the code so
virNetDevGetPhysPortName and virNetDevGetPhysPortID will use
same method to read the netdevice sysfs.
Signed-off-by: Moshe Levi <moshele@nvidia.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Fixes a memory leak when hypervCreateInvokeParamsList() fails.
Signed-off-by: Matt Coleman <matt@datto.com>
Reviewed-by: Laine Stump <laine@redhat.com>
The code handles XML bits and internal definition and should be
in conf directory.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The code handles XML bits and internal definition and should be
in conf directory.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Same as virStorageFileBackend, it doesn't belong into util directory.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
It's used only by storage file code so it doesn't make sense to have
it in util directory.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Up until now we had a runtime code and XML related code in the same
source file inside util directory.
This patch takes the runtime part and extracts it into the new
storage_file directory.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This code is not directly relevant to virStorageSource so move it to
separate file.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Introduce a new storage_file directory where we will keep storage file
related code. Add a backend prefix to the file name to separate it from
other future files with 'storage_file' prefix.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This will allow following patches to move virStorageSource into conf
directory and virStorageDriverData into a new storage_file directory.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
These files are using functions from virstoragefile.h but are missing
explicit include.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When adding a rule for an image file and that image file has a chain
of backing files then we need to add a rule for each of those files.
To get that iterate over the backing file chain the same way as
dac/selinux already do and add a label for each.
Fixes: https://gitlab.com/libvirt/libvirt/-/issues/118
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Since Hyper-V allows multiple VMs to be created with the same name,
some commands produce unpredictable results due to
hypervDomainLookupByName's WMI query selecting the wrong domain.
For example, this prevents `virsh dumpxml` from outputting XML for the
wrong domain.
Signed-off-by: Matt Coleman <matt@datto.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
It's better to fill in missing values in post parse callbacks
than during parsing.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The _virDomainMemoryDef structure has @uuid member which is
needed for PPC64 guests. No other architectures use it. Since the
member is VIR_UUID_BUFLEN bytes long, the structure is
unnecessary big. If the member is just a pointer then we can also
replace some calls of virUUIDIsValid() with plain test against
NULL and also simplify formatter code which can now also check
the pointer against NULL.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Now we have everything prepared for generating the command line.
The device alias prefix was chosen to be 'virtiopmem'.
Since virtio-pmem-pci device goes onto PCI bus generating device
alias must have been changed slightly because
qemuAssignDeviceMemoryAlias() might have used DIMM slot number to
generate the alias. This obviously won't work and thus the "old"
way (which includes qemuDomainDeviceAliasIndex()) must be used.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1735375
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Some users might want to have virtio-pmem backed by a block device
in which case we have to create the device in the domain private
namespace.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Some users might want to have virtio-pmem backed by a block
device in which case we have to allow the device in CGroups.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Just like with NVDIMM model, we have to relabel the path to
virtio-pmem so that QEMU can access it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The virtio-pmem is a virtio variant of NVDIMM and just like
NVDIMM virtio-pmem also allows accessing host pages bypassing
guest page cache. The difference is that if a regular file is
used to back guest's NVDIMM (model='nvdimm') the persistence of
guest writes might not be guaranteed while with virtio-pmem it
is.
To express this new model at domain XML level, I've chosen the
following:
<memory model='virtio-pmem' access='shared'>
<source>
<path>/tmp/virtio_pmem</path>
</source>
<target>
<size unit='KiB'>524288</size>
</target>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</memory>
Another difference between NVDIMM and virtio-pmem is that while
the former supports NUMA node locality the latter doesn't. And
also, the latter goes onto PCI bus and not into a DIMM module.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit introduces a new capability that reflects virtio-pmem-pci
device support in qemu:
QEMU_CAPS_DEVICE_VIRTIO_PMEM_PCI, /* -device virtio-pmem-pci */
The virtio-pmem-pci device was introduced in QEMU 4.1.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
In the past, the MTU of libvirt virtual network bridge devices was
implicitly set by setting the MTU of the "dummy tap device" (which was
being added in order to force a particular MAC address from the
bridge). But the dummy tap device was removed in commit ee6c936fbb
(libvirt-6.8.0), and so the mtu setting in the network is ignored.
The solution is, of course, to explicitly set the bridge device MTU
when it is created.
Note that any guest interface with a larger MTU that is attached will
cause the bridge to (temporarily) assume the larger MTU, but it will
revert to the bridge's own MTU when that device is deleted (this is
not due to anything libvirt does; it's just how Linux host bridges
work).
Fixes: ee6c936fbb
Resolves: https://bugzilla.redhat.com/1913561
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
managed='no' on an <interface> allows an unprivileged libvirt to use a
pre-created tap/macvtap device that libvirt has permission to
open/read/write, but no permission to modify (i.e. set the MTU or MAC
address). But when the XML had an <mtu size='blah'/> setting (which
was put there in order to tell the *guest* OS what MTU to set for the
emulated device at the other end of the tap) we were attempting to set
the MTU of the tap device on the host, paying no attention to the
setting of 'managed'. That would of course end in failure.
This patch only sets the MTU if managed='no' is *not* set (so, if it
is 'yes', or just not set at all).
Note that MTU of the tap is also set when connecting the tap to a
bridge device, but managed='no' is only allowed for <interface
type='ethernet'>, which would never attach to a bridge anyway, so we
don't need the check there.
Resolves: https://bugzilla.redhat.com/1905929
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Extract common code as helper function virNetlinkTalk, then simplify
the functions virNetlink[DumpLink|NewLink|DelLink|GetNeighbor].
Signed-off-by: Shi Lei <shi_lei@massclouds.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Introduce a macro NETLINK_MSG_APPEND to wrap nlmsg_append and
simplify code. Remove those labels 'buffer_too_small', since they
are now useless.
Signed-off-by: Shi Lei <shi_lei@massclouds.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Move macros NETLINK_MSG_[NEST_START|NEST_END|PUT] from .h into .c;
within these macros, replace 'goto' with reporting error and returning;
simplify virNetlinkDumpLink and virNetlinkDelLink by using NETLINK_MSG_PUT.
Signed-off-by: Shi Lei <shi_lei@massclouds.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
NLM_F_CREATE and NLM_F_EXCL are invalid for RTM_DELLINK,
so remove them.
Signed-off-by: Shi Lei <shi_lei@massclouds.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Commit 154df5840d added support for <metadata_cache> as property of a
<disk>. Since the same parser is used to parse the XML used with
virDomainBlockCopy it starts the copy job with the appropriate cache
configured, but the <mirror> doesn't show this configuration nor it's
preserved if libvirtd is restarted during the mirror.
Add parsing, formatting and tests for <metadata_cache> for a <mirror>.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Depending on the memballoon model, the corresponding QOM node
will have a different type and we need to account for this
when searching for it in the QOM tree.
https://bugzilla.redhat.com/show_bug.cgi?id=1911786
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When a block job is terminated we should clear the 'mirrorState' and
'mirrorJob' variables so that stale values are not present prior to a
new job.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Use the per-job state to determine when the non-shared-storage mirror is
complete rather than the per-disk definition one. The qemuBlockJobData
is a newer approach and is always cleared after the blockjob is
terminated while the 'mirrorState' variable in the definition of the
disk may be left over. In such case the disk mirror would be considered
complete prematurely.
https://bugzilla.redhat.com/show_bug.cgi?id=1889131
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
So far we assumed that any vhostuser interface is plugged into an
OVS bridge and thus 'ovs-vsctl' exists. But this is not always
true. In testing scenarios it is possible to create a vhostuser
interface with this tool dpdk-testpmd (part of dpdk RPM) which
creates/connects to UNIX socket needed for vhostuser. Of course,
since there is no OVS then there is no interface name in which
case virNetDevOpenvswitchGetVhostuserIfname() should return 0.
The rest of APIs that assume OVS are not 'fixed' because we still
want them to fail (e.g. getting statistics, plugging interface
into an OVS bridge, unplugging it from an OVS bridge, ...).
The only API that is fixed is
virNetDevOpenvswitchGetVhostuserIfname() because it is called
explicitly when starting a guest (and callers are okay if no name
was found).
The other way to fix this bug seems to be to simply require
'ovs-vsctl' on spec file level, but that is too heavy gun given
that vhostuser is used by a small set of our users (assumption
made on requirements for vhostuser). Also, this way would drag in
yet another dependency for all users (even those who want minimal
libvirt).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1913156
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Now that this function can be called regardless of interface type (and
whether or not we have a conn for the network driver), let's actually
call it for all interface types. This will assure that we re-connect
any disconnected bridge devices for <interface type='bridge'> as
mentioned in https://bugzilla.redhat.com/show_bug.cgi?id=1730084#c26
(until now we've only been reconnecting bridge devices for <interface
type='network'>)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The bridge reattach functionality in this function should be called
for interface types other than just type='network', so make it
callable for any type - it just becomes a NOP for types where no
action is needed.
In the case of <interface type='network'> we need to create a port in
the network driver, and for both type='network and type='bridge' we
need to reattach the bridge device (note that
virDomainNetGetActualBridgeName() gets the bridge name from the
appropriate (and different!) location for either type of interface).
All other interfaces currently require no action.
modifying callers of this function to actually call it for all
interface types is in the next patch. For now the behavior should be
identical pre and post-patch.
(NB: the conn argument can now legitimately be NULL, so we need to
change the ATTRIBUTE_NONNULL() directive for the function's
declaration - I noticed when making this change that argument 3 (the
NetDefPtr) could never be NULL, so I added ATTRIBUTE_NONNULL(3) while
removing ATTRIBUTE_NONNULL(1) (conn)).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>Reviewed-by: Michal Privoznik <mprivozn@redhat.com>#Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
dnsmasq usually prints out a version string like this:
Dnsmasq version 2.82 [...]
but a user reported that the build of dnsmasq included with pihole has
a version string like this:
Dnsmasq version pi-hole-2.81 [...]
We parse the dnsmasq version number to figure out if the dnsmasq
binary supports certain features. Since we expect the version number
(and it must be only numbers!) to start on the first non-space after
the string "Dnsmasq version", we fail to parse this format of the
version string.
Rather than spending a bunch of time trying to get pihole to change
that, we can just make our parsing more permissive - after searching
for "Dnsmasq version", we'll skip ahead to the first decimal digit,
rather than just the first non-space.
(NB: The features we're checking for purely by looking at version
number have been in all releases of dnsmasq since at least 2012, so we
could actually just remove the reading of the version number
completely. However it's possible (although *highly* unlikely)
that some new feature would be added to dnsmasq in the future and we
would need to add that code back.)
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/29
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This function skips over the beginning of a string until it reaches a
decimal digit (0-9) or the NULL at the end of the string. The original
pointer is modified in place (similar to virSkipSpaces()).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
qemu's qcow2 driver allows control of the metadata cache of qcow2 driver
by the 'cache-size' property. Wire it up to the recently introduced
elements.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Similarly to the domain config code it may be beneficial to control the
cache size of images introduced as snapshots into the backing chain.
Wire up handling of the 'metadata_cache' element.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
In certain specific cases it might be beneficial to be able to control
the metadata caching of storage image format drivers of a hypervisor.
Introduce XML machinery to set the maximum size of the metadata cache
which will be used by qemu's qcow2 driver.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Unify the code with other places using virXMLFormatElement.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Enable parsing of backing store strings containing the native 'nfs'
protocol specification.
Signed-off-by: Ryan Gahagan <rgahagan@cs.utexas.edu>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Implement support for the 'nfs' native protocol driver in the qemu
driver.
QEMU accepts numeric UID/GID for 'nfs' protocol file driver thus libvirt
needs to perform the lookup prior to passing it to qemu.
Signed-off-by: Ryan Gahagan <rgahagan@cs.utexas.edu>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
'nfs_user'/'nfs_group' represents the XML configuration.
'nfs_uid'/'nfs_gid' is internal store when libvirt looks up the user's
uid/gid in the system.
Signed-off-by: Ryan Gahagan <rgahagan@cs.utexas.edu>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Get rid of the 'cleanup' label and 'created' variable.
Signed-off-by: Yi Li <yili@winhong.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
It is now doing way more than gathering the CPU data from a host as the
other scripts were merged in it.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
cpu-cpuid.py was merged into cpu-gather.py and the script can handle
multiple files so there's no need for a loop around it.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Use one variable per extracted property instead of reusing strings and
drop needless VIR_FREE calls.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Similarly to startup of the VM qemu doesn't like setting throttling for
an empty drive. Just skip it since we do the correct thing once new
media is inserted.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/117
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Tested-by: Han Han <hhan@redhat.com>
The monitor code uses 'flags' for the flags of the monitor builder,
while in this function it's a different set of flags. All callers pass a
variable named 'cdevflags', so rename the argument to suit.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
virJSONValueObjectRemoveKey can be used as direct replacement. Fix the
one caller and remove the duplicate function.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Remove freeing/clearing of @props as the function doesn't guarantee that
it happens on success, rename the variable hodling copy of the alias and
use g_autofree to automatically free it and remove the cleanup label as
well as 'ret' variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The callers of qemuMonitorAddObject rely on the fact that @alias is
filled only when the object is added successfully. This is documented
but the code didn't behave like that.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
All callers of qemuMonitorJSONMakeCommandInternal will benefit from
making @arguments a double pointer and passing it to
virJSONValueObjectCreate directly which will clear it if it steals the
value.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Prepare for a refactor of qemuMonitorJSONMakeCommandInternal.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use automatic memory freeing and remove the 'cleanup' label and 'ret'
variable.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This allows simplification of the caller as well as will enable a later
refactor of qemuMonitorJSONMakeCommandInternal.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The lookup didn't do anything apart from comparing the sysfs paths
anyway since that's what makes each mdev unique.
The most ridiculous usage of the old logic was in
virHostdevReAttachMediatedDevices where in order to drop an mdev
hostdev from the list of active devices we first had to create a new
mdev and use it in the lookup call. Why couldn't we have used the
hostdev directly? Because the hostdev and mdev structures are
incompatible.
The way mdevs are currently removed is via a write to a specific sysfs
attribute. If you do it while the machine which has the mdev assigned
is running, the write call may block (with a new enough kernel, with
older kernels it would return a write error!) until the device
is no longer in use which is when the QEMU process exits.
The interesting part here comes afterwards when we're cleaning up and
call virHostdevReAttachMediatedDevices. The domain doesn't exist
anymore, so the list of active hostdevs needs to be updated and the
respective hostdevs removed from the list, but remember we had to
create an mdev object in the memory in order to find it in the list
first which will fail because the write to sysfs had already removed
the mdev instance from the host system.
And so the next time you try to start the same domain you'll get:
"Requested operation is not valid: mediated device <path> is in use by
driver QEMU, domain <name>"
Fixes: https://gitlab.com/libvirt/libvirt/-/issues/119
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
We set the pointer to some garbage packed structure data without
knowing whether we were actually handling the type of device we
expected to be handling. On its own, this was harmless, because we'd
never use the pointer as we'd skip the device if it were not the
expected type. However, it's better to make the logic even more
explicit - we first check the device and only when we're sure we have
the expected type we then update the pointer shortcut.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virDeviceHasPCIExpressLink() wasn't checking that pcie_cap_pos was
valid before attempting to use it, which could lead to reading the
byte at offset 0 + PCI_CAP_ID_EXP instead of [valid offset] +
PCI_CAP_ID_EXP. In particular, this could happen for "integrated" PCI
devices (those that are on the PCIe root complex). If it happened that
the byte from the wrong address had the "right" bit set, then it would
lead to us innappropriately believing that Express Link info was
available when it wasn't, and the node device driver would then log an
error like this:
virPCIDeviceGetLinkCapSta:2754 :
internal error: pci device 0000:00:18.0 is not a PCI-Express device
during a libvirtd restart. (this didn't ever occur until after
virPCIDeviceIsPCIExpress() was made more intelligent in commit
c00b6b1ae, which hasn't yet been in any official release)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The two scenarios were found by Coverity after a seemingly-unrelated
change to virLXCProcessSetupInterfaceTap() (in commit ecfc2d5f43), and
explained by John Ferlan here:
https://www.redhat.com/archives/libvir-list/2020-December/msg00810.html
To re-explain:
a) On entry to virLXCProcessSetupInterfaceTap() if net->ifname != NULL
then a copy of net->ifname is made into parentVeth, and a reference
to *that* pointer is sent down to virNetDevVethCreate().
b) If parentVeth (aka net->ifname) is a template name (e.g. "blah%d"),
then virNetDevVethCreate() calls virNetDevGenerateName(), and if
virNetDevGenerateName() successfully generates a usable name
(e.g. "blah27") then it will free the original template string
(which is pointed to by net->ifname and by parentVeth), then
replace the pointer in parentVeth with a pointer to the new
string. Note that net->ifname still points to the now-freed
template string.
c) returning back up to virLXCProcessSetupInterfaceTap(), we check if
net->ifname == NULL - it *isn't* (still contains stale pointer to
template string), so we don't replace it with the pointer to the new
string that is in parentVeth.
d) Result: the new string is leaked once we return from
virLXCProcessSetupInterfaceTap(), while there is a dangling pointer
to the old string in net->ifname.
There is also a leak if there is a failure somewhere between steps (b)
and (c) above - the failure cleanup in virNetDevVethCreate() will only
free the newly-generated parentVeth string if the original pointer was
NULL (narrator: "It wasn't."). But it's a new string allocated by
virNetDevGenerateName(), not the original string from net->ifname, so
it really does need to be freed.
The solution is to make a copy of the entire original string into a
g_autofree pointer, then iff everything is successful we g_free() the
original net->ifname and replace it by stealing the string returned by
virNetDevVethCreate().
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In all cases *except* when parsing status XML as libvirt is being
restarted, the XML parser will delete any manually specified interface
name (aka "<target dev='blah'/>" aka net->ifname) that could have been
generated by virNetDevGenerateName(). This means that during the setup
when a domain is being started (e.g. during
virLXCProcessSetupInterfaceTap()) it is pointless to call
virNetDevReserveName() with any setting of net->ifname that has come
from the XML parser - it is guaranteed to not fit the pattern of any
auto-generated name, and so the call is just a NOP anyway.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Due to missing pdpe1gb support in the host CPU data, the CPU is still
incorrectly detected as Westmere-IBRS for host capabilities because we
don't have the option to disable features included in the base model
there.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
When defining/creating a network the bridge name may be filled in
automatically by libvirt (if none provided in the input XML or
the one provided is a pattern, e.g. "virbr%d"). During the
bridge name generation process a candidate name is generated
which is then checked with the rest of already defined/running
networks for collisions.
Problem is, that there is no mutex guarding this critical section
and thus if two threads line up so that they both generate the
same candidate they won't find any collision and the same name is
then stored.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/78
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
The @fds member of qemuMonitorFdsetInfo struct is an array and as
such, it's allocated in qemuMonitorJSONQueryFdsetsParse() but not
freed in qemuMonitorFdsetsFree().
Fixes: b8998cc670
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
@tmp that was copied just above is leaked on plain return.
The issue is found by Coverity.
Patch that inroduced a leak:
d4439a6b8 : src: adopt to VIR_DRV_SUPPORTS_FEATURE return -1
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Fixes compiler error:
src/qemu/qemu_migration.c:4814:20: error: ‘dstOffline’ may be used
uninitialized in this function [-Werror=maybe-uninitialized]
4814 | if (offline && !dstOffline) {
The commit that introduced the error:
910b94df: qemu: adopt to VIR_DRV_SUPPORTS_FEATURE return -1
Signed-off-by: Nick Shyrokovskiy <nshyrokovskiy@gmail.com>
Changes to a virtio network device such as
<interface type="network">
<model type="virtio"/>
<driver iommu="on" ats="on"/> <!-- this line added -->
...
</interface>
were quietly dismissed by `virsh update-device ... --live`.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
