* configure.ac: Set WITH_SYSCTL only on Linux hosts
* daemon/Makefile.am: Conditionalize install-sysctl using WITH_SYSCTL
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Cc: Jason Helfman <jhelfman@e-e.com>

The code is splattered with a mix of

  sizeof foo
  sizeof (foo)
  sizeof(foo)

Standardize on sizeof(foo) and add a syntax check rule to
enforce it
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

 * Don't advertise information on the network without consent of
   the user, either through manual configuration, or a user
   interface that drives this option.
 * Since libvirtd must be configured for network access anyway
   (for all but ssh), this setting was not useful "out of the box",
   so changing this default setting does not remove "out of the box"
   functionality.

This patch introduces a new event type for the QMP event
SUSPEND:

    VIR_DOMAIN_EVENT_ID_PMSUSPEND

The event doesn't take any data, but considering there might
be reason for wakeup in future, the callback definition is:

typedef void
(*virConnectDomainEventSuspendCallback)(virConnectPtr conn,
                                        virDomainPtr dom,
                                        int reason,
                                        void *opaque);

"reason" is unused currently, always passes "0".

This patch introduces a new event type for the QMP event
WAKEUP:

    VIR_DOMAIN_EVENT_ID_PMWAKEUP

The event doesn't take any data, but considering there might
be reason for wakeup in future, the callback definition is:

typedef void
(*virConnectDomainEventWakeupCallback)(virConnectPtr conn,
                                       virDomainPtr dom,
                                       int reason,
                                       void *opaque);

"reason" is unused currently, always passes "0".

This patch introduces a new event type for the QMP event
DEVICE_TRAY_MOVED, which occurs when the tray of a removable
disk is moved (i.e opened or closed):

    VIR_DOMAIN_EVENT_ID_TRAY_CHANGE

The event's data includes the device alias and the reason
for tray status' changing, which indicates why the tray
status was changed. Thus the callback definition for the event
is:

enum {
    VIR_DOMAIN_EVENT_TRAY_CHANGE_OPEN = 0,
    VIR_DOMAIN_EVENT_TRAY_CHANGE_CLOSE,

\#ifdef VIR_ENUM_SENTINELS
    VIR_DOMAIN_EVENT_TRAY_CHANGE_LAST
\#endif
} virDomainEventTrayChangeReason;

typedef void
(*virConnectDomainEventTrayChangeCallback)(virConnectPtr conn,
                                           virDomainPtr dom,
                                           const char *devAlias,
                                           int reason,
                                           void *opaque);

Currently the libvirt.service unit file for systemd does not
specify any kill mode. So systemd kills off every process
inside its cgroup. ie all dnsmasq processes, all virtual
machines. This obviously not what we want. Set KillMode=process
so that it only kills the top level process of libvirtd

* daemon/libvirtd.service.in: Add KillMode=process
Reported-By: NMark McLoughlin <markmc@redhat.com>
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Overflow can be user-induced, so it deserves more than being called
an internal error.  Note that in general, 32-bit platforms have
far more places to trigger this error (anywhere the public API
used 'unsigned long' but the other side of the connection is a
64-bit server); but some are possible on 64-bit platforms (where
the public API computes the product of two numbers).

* include/libvirt/virterror.h (VIR_ERR_OVERFLOW): New error.
* src/util/virterror.c (virErrorMsg): Translate it.
* src/libvirt.c (virDomainSetVcpusFlags, virDomainGetVcpuPinInfo)
(virDomainGetVcpus, virDomainGetCPUStats): Use it.
* daemon/remote.c (HYPER_TO_TYPE): Likewise.
* src/qemu/qemu_driver.c (qemuDomainBlockResize): Likewise.

The RPC code assumed that the array returned by the driver would be
fully populated; that is, ncpus on entry resulted in ncpus * return
value on exit.  However, while we don't support holes in the middle
of ncpus, we do want to permit the case of ncpus on entry being
longer than the array returned by the driver (that is, it should be
safe for the caller to pass ncpus=128 on entry, and the driver will
stop populating the array when it hits max_id).

Additionally, a successful return implies that the caller will then
use virTypedParamArrayClear on the entire array; for this to not
free uninitialized memory, the driver must ensure that all skipped
entries are explicitly zeroed (the RPC driver did this, but not
the qemu driver).

There are now three cases:
server 0.9.10 and client 0.9.10 or newer: No impact - there were no
hypervisor drivers that supported cpu stats

server 0.9.11 or newer and client 0.9.10: if the client calls with
ncpus beyond the max, then the rpc call will fail on the client side
and disconnect the client, but the server is no worse for the wear

server 0.9.11 or newer and client 0.9.11: the server can return a
truncated array and the client will do just fine

I reproduced the problem by using a host with 2 CPUs, and doing:
virsh cpu-stats $dom --start 1 --count 2

* daemon/remote.c (remoteDispatchDomainGetCPUStats): Allow driver
to omit tail of array.
* src/remote/remote_driver.c (remoteDomainGetCPUStats):
Accommodate driver that omits tail of array.
* src/libvirt.c (virDomainGetCPUStats): Document this.
* src/qemu/qemu_driver.c (qemuDomainGetPercpuStats): Clear all
unpopulated entries.

The init script for the daemon requests to start HAL although it has
been deprecated long time ago. This patch removes the dependency.

No thanks to 64-bit windows, with 64-bit pid_t, we have to avoid
constructs like 'int pid'.  Our API in libvirt-qemu cannot be
changed without breaking ABI; but then again, libvirt-qemu can
only be used on systems that support UNIX sockets, which rules
out Windows (even if qemu could be compiled there) - so for all
points on the call chain that interact with this API decision,
we require a different variable name to make it clear that we
audited the use for safety.

Adding a syntax-check rule only solves half the battle; anywhere
that uses printf on a pid_t still needs to be converted, but that
will be a separate patch.

* cfg.mk (sc_correct_id_types): New syntax check.
* src/libvirt-qemu.c (virDomainQemuAttach): Document why we didn't
use pid_t for pid, and validate for overflow.
* include/libvirt/libvirt-qemu.h (virDomainQemuAttach): Tweak name
for syntax check.
* src/vmware/vmware_conf.c (vmwareExtractPid): Likewise.
* src/driver.h (virDrvDomainQemuAttach): Likewise.
* tools/virsh.c (cmdQemuAttach): Likewise.
* src/remote/qemu_protocol.x (qemu_domain_attach_args): Likewise.
* src/qemu_protocol-structs (qemu_domain_attach_args): Likewise.
* src/util/cgroup.c (virCgroupPidCode, virCgroupKillInternal):
Likewise.
* src/qemu/qemu_command.c(qemuParseProcFileStrings): Likewise.
(qemuParseCommandLinePid): Use pid_t for pid.
* daemon/libvirtd.c (daemonForkIntoBackground): Likewise.
* src/conf/domain_conf.h (_virDomainObj): Likewise.
* src/probes.d (rpc_socket_new): Likewise.
* src/qemu/qemu_command.h (qemuParseCommandLinePid): Likewise.
* src/qemu/qemu_driver.c (qemudGetProcessInfo, qemuDomainAttach):
Likewise.
* src/qemu/qemu_process.c (qemuProcessAttach): Likewise.
* src/qemu/qemu_process.h (qemuProcessAttach): Likewise.
* src/uml/uml_driver.c (umlGetProcessInfo): Likewise.
* src/util/virnetdev.h (virNetDevSetNamespace): Likewise.
* src/util/virnetdev.c (virNetDevSetNamespace): Likewise.
* tests/testutils.c (virtTestCaptureProgramOutput): Likewise.
* src/conf/storage_conf.h (_virStoragePerms): Use mode_t, uid_t,
and gid_t rather than int.
* src/security/security_dac.c (virSecurityDACSetOwnership): Likewise.
* src/conf/storage_conf.c (virStorageDefParsePerms): Avoid
compiler warning.

This code adds a netlink event interface to libvirt.
It is based upon the event_poll code and makes use of
it. An event is generated for each netlink message sent
to the libvirt pid.
Signed-off-by: ND. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>

Hooks may now be used as filters.

The /usr/include/python/pyconfig.h file pollutes the global
namespace with a huge number of HAVE_XXX and WITH_XXX
defines. These change what we detected in our own config.h
In particular if you try to build without DTrace, python's
headers turn it back on with predictable fail.

THe hack to workaround this is to rename WITH_DTRACE to
WITH_DTRACE_PROBES to avoid the namespace clash

Commit 7033c5f2 introduced some bugs in polkit0 authentication.

Fix libvirtd segfault in remoteDispatchAuthPolkit().

Fix polkit authentication bypass when caller UID = 0.

Commit 8dd623b9 introduced a build error with --enable-compile-warnings=error

  remote.c:2593: error: unused variable 'rv' [-Wunused-variable]

Pushing under build-breaker rule.

Regression introduced in commit 7033c5f2, due to improper conversion
from snprintf to virAsprintf.

* daemon/remote.c (remoteDispatchAuthList): Check return value
correctly.

Leak introduced in commit bb2eddc6.

* daemon/remote.c (remoteDispatchAuthPolkit): Also free pkout on
success.

If you are sitting in front of a physical machine and logged in as
a regular user, you can connect to the system libvirtd instance
by providing a root password to policykit. This is how most
virt-manager users talk to libvirt.

However, if you are launching virt-manager over ssh -X, or over
VNC started from say /etc/sysconfig/vncservers, our policykit policy
rejects the user outright, providing no option to provide the root
password. This is confusing to users and doesn't seem to serve much
point.

Change the policy to allow inactive (VNC) and non-local (SSH, VNC)
to provide root credentials for accessing system libvirtd. We use
auth_admin rather than auth_admin_keep so that credentials aren't
cached at all, and every subsequent reconnection to libvirt requires
auth.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=625115
Similar change to PackageKit policy:
https://bugzilla.redhat.com/show_bug.cgi?id=528511

Unlike .cvsignore under CVS, git allows for ignoring nested
names.  We weren't very consistent where new tests were
being ignored (some in .gitignore, some in tests/.gitignore),
and I found it easier to just consolidate everything.

* .gitignore: Subsume entries from subdirectories.
* daemon/.gitignore: Delete.
* docs/.gitignore: Likewise.
* docs/devhelp/.gitignore: Likewise.
* docs/html/.gitignore: Likewise.
* examples/dominfo/.gitignore: Likewise.
* examples/domsuspend/.gitignore: Likewise.
* examples/hellolibvirt/.gitignore: Likewise.
* examples/openauth/.gitignore: Likewise.
* examples/domain-events/events-c/.gitignore: Likewise.
* include/libvirt/.gitignore: Likewise.
* src/.gitignore: Likewise.
* src/esx/.gitignore: Likewise.
* tests/.gitignore: Likewise.
* tools/.gitignore: Likewise.

Our syntax checker missed all-lower-case variables (this will
be fixed by the next .gnulib update).  Additionally, anywhere
that we mix in-tree files with generated files, automake recommends
listing builddir prior to srcdir for VPATH builds.

* src/Makefile.am (*_la_CFLAGS): Favor $(top_srcdir).
(INCLUDES): Likewise, and follow automake recommendations on
builddir before srcdir.
* python/Makefile.am (INCLUDES): Swap directory order.
* tests/Makefile.am (INCLUDES): Likewise.
* tools/Makefile.am (INCLUDES): Likewise.
* daemon/Makefile.am (INCLUDES): Likewise.
(libvirtd.init, libvirtd.service): Favor $().
* examples/hellolibvirt/Makefile.am (hellolibvirt_LDADD):
Likewise.
* examples/openauth/Makefile.am (openauth_LDADD): Likewise.
* examples/dominfo/Makefile.am (INCLUDES): Drop dead include.
* examples/domsuspend/Makefile.am (INCLUDES): Likewise.

Sometimes, its easier to run children with 2>&1 in shell notation,
and just deal with stdout and stderr interleaved.  This was already
possible for fd handling; extend it to also work when doing string
capture of a child process.

* docs/internals/command.html.in: Document this.
* src/util/command.c (virCommandSetErrorBuffer): Likewise.
(virCommandRun, virExecWithHook): Implement it.
* tests/commandtest.c (test14): Test it.
* daemon/remote.c (remoteDispatchAuthPolkit): Use new command
feature.

GCC complaints about uninitialized use of len, which however is only
used when errors != NULL and in that case len is always initialized.
It's trivial to silence this by always initializing len.

One of my latest patches (d8db0f96) created support for setting
the limit for the maximum of opened files by qemu user. However,
since libvirtd keeps one FD opened per domain (well, for qemu at least)
it will likely hit this limit on huge scenarios.

Using new function 'virTypedParameterArrayClear' to simplify block of codes.

* daemon/remote.c, src/remote/remote_driver.c: simplify codes.
Signed-off-by: NAlex Jia <ajia@redhat.com>

Unlike other users of virTypedParameter with RPC, this interface
can return zero-filled entries because the interface assumes
2 dimensional array. We compress these entries out from the
server when generating the over-the-wire contents, then reconstitute
them in the client.
Signed-off-by: NEric Blake <eblake@redhat.com>

Several not uncommon issues can be diagnosed through pkcheck output, like
lack of/malfunctioning desktop agent, or lack of/malfunctioning polkit
dbus agent.

And hook it up for policykit auth. This allows virt-manager to detect
that the user clicked the policykit 'cancel' button and not throw
an 'authentication failed' error message at the user.

Convert daemon code to handle 64-bit pid_t (even though at the
moment, it is not compiled on mingw).

* daemon/remote.c (remoteDispatchAuthList)
(remoteDispatchAuthPolkit): Print pid_t via %lld.

Using snprintf to build up argv seems archaic.

* daemon/remote.c (remoteDispatchAuthPolkit): Modernize command call.

Although this is a public API break, it only affects users that
were compiling against *_LAST values, and can be trivially
worked around without impacting compilation against older
headers, by the user defining VIR_ENUM_SENTINELS before using
libvirt.h.  It is not an ABI break, since enum values do not
appear as .so entry points.  Meanwhile, it prevents users from
using non-stable enum values without explicitly acknowledging
the risk of doing so.

See this list discussion:
https://www.redhat.com/archives/libvir-list/2012-January/msg00804.html

* include/libvirt/libvirt.h.in: Hide all sentinels behind
LIBVIRT_ENUM_SENTINELS, and add missing sentinels.
* src/internal.h (VIR_DEPRECATED): Allow inclusion after
libvirt.h.
(LIBVIRT_ENUM_SENTINELS): Expose sentinels internally.
* daemon/libvirtd.h: Use the sentinels.
* src/remote/remote_protocol.x (includes): Don't expose sentinels.
* python/generator.py (enum): Likewise.
* tests/cputest.c (cpuTestCompResStr): Silence compiler warning.
* tools/virsh.c (vshDomainStateReasonToString)
(vshDomainControlStateToString): Likewise.

Preparation for another patch that refactors common patterns
into the new file for fewer lines of code overall.

* src/util/util.h (virTypedParameterArrayClear): Move...
* src/util/virtypedparam.h: ...to new file.
(virTypedParameterArrayValidate, virTypedParameterAssign): New
prototypes.
* src/util/util.c (virTypedParameterArrayClear): Likewise.
* src/util/virtypedparam.c: New file.
* po/POTFILES.in: Mark file for translation.
* src/Makefile.am (UTIL_SOURCES): Build it.
* src/libvirt_private.syms (util.h): Split...
(virtypedparam.h): to new section.
(virkeycode.h): Sort.
* daemon/remote.c: Adjust callers.
* tools/virsh.c: Likewise.

To avoid a namespace clash with forthcoming identity APIs,
rename the virNet*GetLocalIdentity() APIs to have the form
virNet*GetUNIXIdentity()

* daemon/remote.c, src/libvirt_private.syms: Update
  for renamed APIs
* src/rpc/virnetserverclient.c, src/rpc/virnetserverclient.h,
  src/rpc/virnetsocket.c, src/rpc/virnetsocket.h: s/LocalIdentity/UNIXIdentity/

* daemon/remote.c: remoteSASLFinish called the method
  virNetSASLSessionGetIdentity twice, remove second call

* daemon/remote.c, src/rpc/virnetserverclient.c,
  src/rpc/virnetserverclient.h, src/rpc/virnetsocket.c,
  src/rpc/virnetsocket.h: Add gid parameter

Most severe here is a latent (but currently untriggered) memory leak
if any hypervisor ever adds a string interface property; the
remainder are mainly cosmetic.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_BANDWIDTH_*): Move
macros closer to interface that uses them, and document type.
* src/libvirt.c (virDomainSetInterfaceParameters)
(virDomainGetInterfaceParameters): Formatting tweaks.
* daemon/remote.c (remoteDispatchDomainGetInterfaceParameters):
Avoid memory leak.
* src/libvirt_public.syms (LIBVIRT_0.9.9): Sort lines.
* src/libvirt_private.syms (domain_conf.h): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSetInterfaceParameters): Fix
comments, break long lines.

* daemon/remote.c: implement the server side support
* src/remote/remote_driver.c: implement the client side support
* src/remote/remote_protocol.x: definitions for the new entry points
* src/remote_protocol-structs: structure definitions

Valgrind detected a pipe fd leak before the parent exits on success,
introduced in commit 4296cea2; by itself, the leak is not bad, since
we immediately called _exit(), but we might as well be clean to make
valgrind analysis easier.  Meanwhile, if the daemon grandchild detects
an error, the parent failed to flush the error message before exiting.
Also, we had the possibility of both parent and child returning to the
caller, such that the user could see duplicated reports of failure
from the two return paths.  And we might as well be robust to the
(unlikely) situation of being started with stdin closed.

* daemon/libvirtd.c (daemonForkIntoBackground): Use exit if an
error message was generated, avoid fd leaks for valgrind's sake,
avoid returning to caller in both parent and child, and don't
close a just-dup'd stdin.
Based on a report by Alex Jia.

* How to reproduce?
  % service libvirtd stop
  % valgrind -v --track-fds=yes /usr/sbin/libvirtd --daemon

* Actual valgrind result:

==16804== FILE DESCRIPTORS: 7 open at exit.
==16804== Open file descriptor 7:
==16804==    at 0x321FAD8B87: pipe (in /lib64/libc-2.12.so)
==16804==    by 0x41F34D: daemonForkIntoBackground (libvirtd.c:186)
==16804==    by 0x4207A0: main (libvirtd.c:1420)
Signed-off-by: NAlex Jia <ajia@redhat.com>
Signed-off-by: NEric Blake <eblake@redhat.com>