Strongly recommend against use of the log_levels setting since it
creates overly verbose logs and has a serious performance impact.

Describe the log filter syntax better and mention use of shell
glob syntax. Also provide more realistic example of good settings
to use. The libvirtd example is biased towards QEMU, but when the
drivers split off each daemon can get its own more appropriate
example.
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Rather than specialcasing handling of the '*' character, use fnmatch()
to get normal shell wildcard syntax, as described in 'man glob(7)'.

To get an indication of the performance impact of using globs instead
of plain string matches, a test program was written. The list of all
260 log categories was extracted from the source. Then a typical log
filters setup was picked by creating an array of the strings "qemu",
"security", "util", "cgroup", "event", "object". Every filter string
was matched against every log category. Timing information showed that
using strstr() this took 8 microseconds, while fnmatch() took 114
microseconds.

IOW, fnmatch is 14 times slower than our existing strstr check. These
numbers show a worst case scenario that will never be hit, because it
is rare that every log category would have data output. The log category
matches are cached, so each category is only checked once no matter how
many log statements are emitted. IOW despite being slower, this will
be lost in the noise and have no consequence on real world logging
performance.
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Reviewed-by: NErik Skultety <eskultet@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

There's this macro virBufferSetChildIndent which sets offset of
child buffer from given parent buffer. However, it is calling
virBufferAdjustIndent() which only adds adjustment instead of
calling virBufferSetIndent() which clears out any adjustment
previously set.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Use "libvirt not compiled with JSON support" instead of mentioning
yajl specifically.
Signed-off-by: NJán Tomko <jtomko@redhat.com>

The last usage was removed by commit <167028e3>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

Signed-off-by: NLin Ma <lma@suse.com>

After version 0.7.5, libssh deprecated the function scope
ssh_get_publickey() and moved to ssh_get_server_publickey(). So, Libvirt
is failing to compile using this new function name.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

This commit adds some checks inside libssh m4 checking to verify if
ssh_get_server_publickey is available. This new function scope replaces
the old ssh_get_publickey() from libssh 0.7.5 and below. Assuming that
some distros are not showing the right version of libssh. This is a
simple way to check which function is available.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

If we are the last one to use pr-manager object we need to remove
it and also kill the qemu-pr-helper process.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

When attaching a disk that requires pr-manager we might need to
plug the pr-manager object and start the pr-helper process.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Before we exec() qemu we have to spawn pr-helper processes for
all managed reservations (well, technically there can only one).
The only caveat there is that we should place the process into
the same namespace and cgroup as qemu (so that it shares the same
view of the system). But we can do that only after we've forked.
That means calling the setup function between fork() and exec().
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Just like we allow users overriding path to bridge-helper
detected at compile time we can allow them to override path to
qemu-pr-helper.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Just like in previous commit, qemu-pr-helper might want to open
/dev/mapper/control under certain circumstances. Therefore we
have to allow it in cgroups.

The change virdevmapper.c might look spurious but it isn't. After
6dd84f68 any path that we're allowing in deivces CGroup is
subject to virDevMapperGetTargets() inspection. And libdevmapper
returns ENXIO for the path from subject.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

If qemu-pr-helper is compiled with multipath support the first
thing it does is open /dev/mapper/control. Since we're going
to be running it inside qemu namespace we need to create it
there. Unfortunately, we don't know if it was compiled with or
without multipath so we have to create it anyway.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

For command line we need two things:

1) -object pr-manager-helper,id=$alias,path=$socketPath
2) -drive file.pr-manager=$alias

In -object pr-manager-helper we tell qemu which socket to connect
to, then in -drive file-pr-manager we just reference the object
the drive in question should use.

For managed PR helper the alias is always "pr-helper0" and socket
path "${vm->priv->libDir}/pr-helper0.sock".
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

The capability tracks if qemu has pr-manager-helper object. At
this time don't actually detect if qemu has the capability. Not
just yet. Only after the code is written the feature will be
enabled.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Couple of reasons for that:

a) there's no monitor command to change path where the pr-helper
connects to, or
b) there's no monitor command to introduce a new pr-helper for a
disk that already exists.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

This is a definition that holds information on SCSI persistent
reservation settings. The XML part looks like this:

  <reservations enabled='yes' managed='no'>
    <source type='unix' path='/path/to/qemu-pr-helper.sock' mode='client'/>
  </reservations>

If @managed is set to 'yes' then the <source/> is not parsed.
This design was agreed on here:

https://www.redhat.com/archives/libvir-list/2017-November/msg01005.htmlSigned-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Rather than have virJSONValueArraySize return a -1 when the input
is not an array and then splat an error message, let's check for
an array before calling and then change the return to be a size_t
instead of ssize_t.

That means using the helper virJSONValueIsArray as well as using a
more generic error message such as "Malformed <something> array".
In some cases we can remove stack variables and when we cannot,
those variables should be size_t not ssize_t. Alter a few references
of if (!value) to be if (value == 0) instead as well.

Some callers can already assume an array is being worked on based
on the previous call, so there's less to do.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

The pointer to the qemu driver is already included in domain object's
private data, so does not need to be passed as yet another parameter
when the domain object is already passed.

Also removes parameter 'driver' from functions which had it just because of
qemuBlockJobUpdate.
Signed-off-by: NRoland Schulz <schullzroll@gmail.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

Signed-off-by: NLin Ma <lma@suse.com>

Signed-off-by: NLin Ma <lma@suse.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Currently the VSH_OT_ARGV options don't support complete, But some of
VSH_OT_ARGV options are gonna support complete in upcoming patches.

Once applied the upcoming completion patches for VSH_OT_ARGV options, If
we don't ignore VSH_OT_ARGV here, The vshReadlineOptionsGenerator will
be called, Hence complete output will consist of the result by command
completer + the result by option completer, It's confusing.
e.g.
    $ virsh domstats --domain <TAB><TAB>
    --backing     --interface      --list-paused      --perf      --vcpu
    --balloon     leap42.3         --list-persistent  --raw       win10
    --block       --list-active    --list-running     sles12sp3
    --cpu-total   --list-inactive  --list-shutoff     sles15
    --enforce     --list-other     --list-transient   --state

After this patch and the upcoming completion patches:
    $ virsh domstats --domain <TAB><TAB>
    leap42.3    sles12sp3    sles15    win10
Signed-off-by: NLin Ma <lma@suse.com>

It's helpful for users while they type certain kind of VSH_OT_ARGV options.
e.g.

$ virsh domstats --domain sles12sp3 --d<TAB>
Signed-off-by: NLin Ma <lma@suse.com>

These VSH_OT_STRING "domain" options support domain name completion now.
Signed-off-by: NLin Ma <lma@suse.com>

Signed-off-by: NLin Ma <lma@suse.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The first entry in the returned array is the substitution for TEXT. It
causes unnecessary output if other commands or options share the same
prefix, e.g.

$ virsh des<TAB><TAB>
des      desc     destroy

or

$ virsh domblklist --d<TAB><TAB>
--d        --details  --domain

This patch fixes the above issue.
Signed-off-by: NLin Ma <lma@suse.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Signed-off-by: NLin Ma <lma@suse.com>

centralize the definition of macro VIRSH_COMMON_OPT_DOMAIN_FULL to virsh.h
to avoid unnecessary duplicated definition
Signed-off-by: NLin Ma <lma@suse.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Unused since commit <a7424faf>.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Use the new helper when checking that the VM needs to be tainted as a
host-cdrom passthrough.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

It's only required on el5 which we don't support anymore. Everywhere
else it's not used for anything useful

https://fedoraproject.org/wiki/RPMGroupsSigned-off-by: NCole Robinson <crobinso@redhat.com>

None of currently supported distributions need that.
Last one was EL5 which is EOL for a while.
Signed-off-by: NIgor Gnatenko <ignatenkobrain@fedoraproject.org>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

None of currently supported distributions need that.
It was needed last for EL5 which is EOL now
Signed-off-by: NIgor Gnatenko <ignatenkobrain@fedoraproject.org>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

Remove my name and email from these files
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NDavid Kiarie <davidkiarie4@gmail.com>

STRPREFIX takes only two arguments, but the code it was adapted from
used function with 3 arguments.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Make sure that 'host_device' is generated for type='block'.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

The test cases would correspond to the following -drive command lines:

dir-fat-cache.xml:
-drive file=fat:/var/somefiles,if=none,id=drive-dummy,readonly=on,cache=directsync
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=off

file-backing_basic-cache-directsync.xml:
-drive file=/var/lib/libvirt/images/a,format=qcow2,if=none,id=drive-dummy,cache=directsync
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=off

file-backing_basic-cache-none.xml:
-drive file=/var/lib/libvirt/images/a,format=qcow2,if=none,id=drive-dummy,cache=none
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=on

file-backing_basic-cache-unsafe.xml:
-drive file=/var/lib/libvirt/images/a,format=qcow2,if=none,id=drive-dummy,cache=unsafe
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=on

file-backing_basic-cache-writeback.xml:
-drive file=/var/lib/libvirt/images/a,format=qcow2,if=none,id=drive-dummy,cache=writeback
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=on

file-backing_basic-cache-writethrough.xml:
-drive file=/var/lib/libvirt/images/a,format=qcow2,if=none,id=drive-dummy,cache=writethrough
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=off

network-qcow2-backing-chain-cache-unsafe.xml:
-drive file=rbd:rbdpool/rbdimg:id=testuser-rbd:auth_supported=cephx\;none:
        mon_host=host1.example.com\;host2.example.com,
        file.password-secret=node-a-s-secalias,format=qcow2,
        if=none,id=drive-dummy,cache=directsync
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=off
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>