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  1. 28 9月, 2017 6 次提交
    • J
      qemu: Introduce qemuDomainPrepareDiskSource · 5c09486c
      由 John Ferlan 提交于 
      Introduce a function to setup any TLS needs for a disk source.

If there's a configuration or other error setting up the disk source
for TLS, then cause the domain startup to fail.

For VxHS, follow the chardevTLS model where if the src->haveTLS hasn't
been configured, then take the system/global cfg->haveTLS setting for
the storage source *and* mark that we've done so via the tlsFromConfig
setting in storage source.

Next, if we are using TLS, then generate an alias into a virStorageSource
'tlsAlias' field that will be used to create the TLS object and added to
the disk object in order to link the two together for QEMU.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
      5c09486c
    • A
      util: Add TLS attributes to virStorageSource · f1705485
      由 Ashish Mittal 提交于 
      Add an optional virTristateBool haveTLS to virStorageSource to
manage whether a storage source will be using TLS.

Sample XML for a VxHS disk:

<disk type='network' device='disk'>
  <driver name='qemu' type='raw' cache='none'/>
  <source protocol='vxhs' name='eb90327c-8302-4725-9e1b-4e85ed4dc251' tls='yes'>
    <host name='192.168.0.1' port='9999'/>
  </source>
  <target dev='vda' bus='virtio'/>
</disk>

Additionally add a tlsFromConfig boolean to control whether the TLS
setting was due to domain configuration or qemu.conf global setting
in order to decide whether to Format the haveTLS setting for either
a live or saved domain configuration file.

Update the qemuxml2xmltest in order to add a test to show the proper
parsing.

Also update the docs to describe the tls attribute.
Signed-off-by: NAshish Mittal <Ashish.Mittal@veritas.com>
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
      f1705485
    • J
      docs: Clean up the description for network disk protocol options · 70ad3052
      由 John Ferlan 提交于 
      Clean up the description a bit to make it more readable and not
appear as one long run-on paragraph.
      70ad3052
    • A
      conf: Introduce TLS options for VxHS block device clients · bd6fdcd8
      由 Ashish Mittal 提交于 
      Add a new TLS X.509 certificate type - "vxhs". This will handle the
creation of a TLS certificate capability for properly configured
VxHS network block device clients.

The following describes the behavior of TLS for VxHS block device:

  (1) Two new options have been added in /etc/libvirt/qemu.conf
      to control TLS behavior with VxHS block devices
      "vxhs_tls" and "vxhs_tls_x509_cert_dir".
  (2) Setting "vxhs_tls=1" in /etc/libvirt/qemu.conf will enable
      TLS for VxHS block devices.
  (3) "vxhs_tls_x509_cert_dir" can be set to the full path where the
      TLS CA certificate and the client certificate and keys are saved.
      If this value is missing, the "default_tls_x509_cert_dir" will be
      used instead. If the environment is not configured properly the
      authentication to the VxHS server will fail.
Signed-off-by: NAshish Mittal <Ashish.Mittal@veritas.com>
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
      bd6fdcd8
    • J
      nwfilter: Fix possible segfault on sometimes consumed variable · 6209bb32
      由 John Ferlan 提交于 
      The virNWFilterIPAddrMapAddIPAddr code can consume the @addr parameter
on success when the @ifname is found in the ipAddressMap->hashTable
hash table in the call to virNWFilterVarValueAddValue; however, if
not found in the hash table, then @addr is formatted into a @val
which is stored in the table and on return the caller would be
expected to free @addr.

Thus, the caller has no way to determine on success whether @addr was
consumed, so in order to fix this create a @tmp variable which will
be stored/consumed when virNWFilterVarValueAddValue succeeds. That way
the caller can free @addr whether the function returns success or failure.
      6209bb32
    • P
      rpc: for messages with FDs always decode count of FDs from the message · 5c52aed1
      由 Pavel Hrdina 提交于 
      The packet with passed FD has the following format:

    --------------------------
    | len | header | payload |
    --------------------------

where "payload" has an additional count of FDs before the actual data:

    ------------------
    | nfds | payload |
    ------------------

When the packet is received we parse the "header", which as a side
effect updates msg->bufferOffset to point to the beginning of "payload".
If the message call contains FDs, we need to also parse the count of
FDs, which also updates the msg->bufferOffset.

The issue here is that when we attempt to read the FDs data from the
socket and we receive EAGAIN we finish the reading and call poll()
to wait for the data the we need.  When the data arrives we already have
the packet in our buffer so we read the "header" again but this time
we don't read the count of FDs because we already have it stored.

That means that the msg->bufferOffset is not updated to point to the
actual beginning of the payload data, but it points to the count of
FDs.  After all FDs are processed we dispatch the message to process
it and decode the payload.  Since the msg->bufferOffset points to wrong
data, we decode the wrong payload and the API call fails with
error messages:

    Domain not found: no domain with matching uuid '67656e65-7269-6300-0c87-5003ca6941f2' ()

Broken by commit 133c511b which fixed a FD and memory leak.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
      5c52aed1
  3. 27 9月, 2017 12 次提交
  5. 26 9月, 2017 3 次提交
  7. 25 9月, 2017 4 次提交
  9. 22 9月, 2017 12 次提交
  11. 21 9月, 2017 3 次提交
    • M
      qemu: Introduce a wrapper over virFileWrapperFdClose · 92524d3e
      由 Michal Privoznik 提交于 
      https://bugzilla.redhat.com/show_bug.cgi?id=1448268

When migrating to a file (e.g. when doing 'virsh save file'),
couple of things are happening in the thread that is executing
the API:

1) the domain obj is locked
2) iohelper is spawned as a separate process to handle all I/O
3) the thread waits for iohelper to finish
4) the domain obj is unlocked

Now, the problem is that while the thread waits in step 3 for
iohelper to finish this may take ages because iohelper calls
fdatasync(). And unfortunately, we are waiting the whole time
with the domain locked. So if another thread wants to jump in and
say copy the domain name ('virsh list' for instance), they are
stuck.

The solution is to unlock the domain whenever waiting for I/O and
lock it back again when it finished.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
      92524d3e
    • J
      qemu: Be more selective when determining cdrom for taint messaging · ed2a741e
      由 John Ferlan 提交于 
      https://bugzilla.redhat.com/show_bug.cgi?id=1471225

Commit id '99a2d6af' was a bit too aggressive with determining whether
the provided path was a "physical" cd-rom in order to generate a taint
message due to the possibility of some guest and host trying to control
the tray. For cd-rom guest devices backed to some VIR_STORAGE_TYPE_FILE
storage, this wouldn't be a problem and as such it shouldn't be a problem
for guest devices using some sort of block device on the host such as
iSCSI, LVM, or a Disk pool would present.

So before issuing a taint message, let's check if the provided path of
the VIR_STORAGE_TYPE_BLOCK backed device is a "known" physical cdrom name
by comparing the beginning of the path w/ "/dev/cdrom" and "/dev/sr".
Also since it's possible the provided path could resolve to some /dev/srN
device, let's get that path as well and perform the same check.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
      ed2a741e
    • M
      qemuBuildHostNetStr: Don't leak @addr · 57d8afcf
      由 Michal Privoznik 提交于 
      The virSocketAddrFormat() allocates the string and it's caller
responsibility to free it afterwards.

==28857== 11 bytes in 1 blocks are definitely lost in loss record 37 of 168
==28857==    at 0x4C2BEDF: malloc (vg_replace_malloc.c:299)
==28857==    by 0x9A81D79: strdup (in /lib64/libc-2.23.so)
==28857==    by 0x5DA3BF0: virStrdup (virstring.c:902)
==28857==    by 0x5D96182: virSocketAddrFormatFull (virsocketaddr.c:427)
==28857==    by 0x5D95E13: virSocketAddrFormat (virsocketaddr.c:352)
==28857==    by 0x5706890: qemuBuildHostNetStr (qemu_command.c:3891)
==28857==    by 0x57138D3: qemuBuildInterfaceCommandLine (qemu_command.c:8597)
==28857==    by 0x5713D6A: qemuBuildNetCommandLine (qemu_command.c:8699)
==28857==    by 0x57176F6: qemuBuildCommandLine (qemu_command.c:10027)
==28857==    by 0x5769D61: qemuProcessCreatePretendCmd (qemu_process.c:6004)
==28857==    by 0x4056EC: testCompareXMLToArgv (qemuxml2argvtest.c:502)
==28857==    by 0x41DF40: virTestRun (testutils.c:180)
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
      57d8afcf