Commit 3c12a67b added
a dependency on the NFS_SUPER_MAGIC macro, which is
defined in linux/magic.h.  Unfortunately linux/magic.h
is not available in RHEL-5, and causes a compile error.
Just define it locally, since this is something that
can't change.
Signed-off-by: NChris Lalancette <clalance@redhat.com>

Move *all* file operations related to creation and writing of libvirt
header to the domain save file into a hook function that is called by
virFileOperation. First try to call virFileOperation as root. If that
fails with EACCESS, and (in the case of Linux) statfs says that we're
trying to save the file on an NFS share, rerun virFileOperation,
telling it to fork a child process and setuid to the qemu user. This
is the only way we can successfully create a file on a root-squashed
NFS server.

This patch (along with setting dynamic_ownership=0 in qemu.conf)
makes qemudDomainSave work on root-squashed NFS.

* src/qemu/qemu_driver.c: provide new qemudDomainSaveFileOpHook()
  utility, use it in qemudDomainSave() if normal creation of the
  file as root failed, and after checking the filesystem type for
  the storage is NFS. In that case we also bypass the security
  driver, as this would fail on NFS.

If qemudDomainRestore fails to open the domain save file, create a
pipe, then fork a process that does setuid(qemu_user) and opens the
file, then reads this file and stuffs it into the pipe. the parent
libvirtd process will use the other end of the pipe as its fd, then
reap the child process after it's done reading.

This makes domain restore work on a root-squash NFS share that is only
visible to the qemu user.

* src/qemu/qemu_driver.c: add new qemudOpenAsUID() helper function,
  and use it in qemudDomainRestore() if reading as root directly failed.

The USB/PCI device hotplug code for the QEMU driver was forgetting
to allocate a unique device alias.

* src/qemu/qemu_driver.c: Fill in device alias for USB/PCI devices

The code assumed that 'device_add' returned an empty string upon
success. This is not true, it sometimes prints random debug info.
THus we need to check for an explicit fail string

* src/qemu/qemu_monitor_text.c: Fix error checking of the device_add
  monitor command

Another warning caught by coverity.  Continue to perform best-effort
closing and resource release, but warn the caller about the failure.

* src/esx/esx_driver.c (esxClose): Return an error on failure to close.

Coverity detected a potential dereference of uninitialized memory
if recvfrom got cut short.

* src/uml/uml_driver.c (umlMonitorCommand): Validate complete read
prior to dereferencing res.

gcc warns:
virsh.c:1879: warning: '0' flag ignored with '-' flag in gnu_printf format

* tools/virsh.c (cmdDomjobinfo): Delete useless flag.

Various safezero() implementations used either -1, errno or -errno
return values. This patch fixes them all to return -1 and set errno
appropriately.

There was also a bug in size parameter passed to safewrite() which could
result in an attempt to write gigabytes out of a megabyte buffer.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

When a VM save attempt failed, the VM would be left in a paused
state. It is neccessary to resume CPU execution upon failure
if it was running originally

* src/qemu/qemu_driver.c: Resume CPUs upon save failure

This supports cancellation of jobs for the QEMU driver against
the virDomainMigrate, virDomainSave and virDomainCoreDump APIs.
It is not yet supported for the virDomainRestore API, although
it is desirable.

* src/qemu/qemu_driver.c: Issue 'migrate_cancel' command if
  virDomainAbortJob is issued during a migration operation
* tools/virsh.c: Add a domjobabort command

This defines the wire protocol for the new API

* src/remote/remote_protocol.x: Wire protocol definition
* src/remote/remote_driver.c,daemon/remote.c: Client and server
  side implementation
* daemon/remote_dispatch_args.h, daemon/remote_dispatch_prototypes.h,
  daemon/remote_dispatch_table.h, src/remote/remote_protocol.c,
  src/remote/remote_protocol.h: Re-generate from remote_protocol.x

This provides the internal glue for the driver API

* src/driver.h: Internal API contract
* src/libvirt.c, src/libvirt_public.syms: Connect public API
  to driver API
* src/esx/esx_driver.c, src/lxc/lxc_driver.c, src/opennebula/one_driver.c,
  src/openvz/openvz_driver.c, src/phyp/phyp_driver.c,
  src/qemu/qemu_driver.c, src/remote/remote_driver.c,
  src/test/test_driver.c src/uml/uml_driver.c, src/vbox/vbox_tmpl.c,
  src/xen/xen_driver.c: Stub out entry points

The new virDomainAbortJob() method provides a way for a second
thread to abort an ongoing job run by another thread. This
extends to any API with  which the virDomainGetJobInfo() API
is intended to work. Cancellation is not guarenteed, rather best
effort on part of the hypervisor and not required to be implmented.

* include/libvirt/libvirt.h.in: Define virDomainAbortJob()

Introduce support for  virDomainGetJobInfo in the QEMU driver. This
allows for monitoring of any API that uses the 'info migrate' monitor
command. ie virDomainMigrate, virDomainSave and virDomainCoreDump

Unfortunately QEMU does not provide a way to monitor incoming migration
so we can't wire up virDomainRestore yet.

The virsh tool gets a new command 'domjobinfo' to query status

* src/qemu/qemu_driver.c: Record virDomainJobInfo and start time
  in qemuDomainObjPrivatePtr objects. Add generic shared handler
  for calling 'info migrate' with all migration based APIs.
* src/qemu/qemu_monitor_text.c: Fix parsing of 'info migration' reply
* tools/virsh.c: add new 'domjobinfo' command to query progress

* src/remote/remote_protocol.x: Define wire protocol format
  for virDomainGetJobInfo API
* src/remote/remote_driver.c, daemon/remote.c: Implement client
  and server marshalling code for virDomainGetJobInfo()
* daemon/remote_dispatch_args.h, daemon/remote_dispatch_prototypes.h
  daemon/remote_dispatch_ret.h, daemon/remote_dispatch_table.h,
  src/remote/remote_protocol.c, src/remote/remote_protocol.h: Rebuild
  files from src/remote/remote_protocol.x

The internal glue layer for the new pubic API

* src/driver.h: Define internal driver API contract
* src/libvirt.c, src/libvirt_public.syms: Wire up public
  API to internal driver API
* src/esx/esx_driver.c, src/lxc/lxc_driver.c, src/opennebula/one_driver.c,
  src/openvz/openvz_driver.c, src/phyp/phyp_driver.c,
  src/qemu/qemu_driver.c, src/remote/remote_driver.c,
  src/test/test_driver.c, src/uml/uml_driver.c, src/vbox/vbox_tmpl.c,
  src/xen/xen_driver.c: Stub new entry point

Introduce a new public API that provides a way to get progress
info on currently running jobs on a virDomainpPtr. APIs that
are initially within scope of this idea are

 virDomainMigrate
 virDomainMigrateToURI
 virDomainSave
 virDomainRestore
 virDomainCoreDump

These all take a potentially long time and benefit from monitoring.
The virDomainJobInfo struct allows for various pieces of information
to be reported

 - Percentage completion
 - Time
 - Overall data
 - Guest memory data
 - Guest disk/file data

* include/libvirt/libvirt.h.in: Add virDomainGetJobInfo
* python/generator.py, python/libvirt-override-api.xml,
  python/libvirt-override.c: Override for virDomainGetJobInfo API
* python/typewrappers.c, python/typewrappers.h: Introduce wrapper
  for unsigned long long type

All other uses of get_str_prop in this file that ignored
failure explicitly cast to void.

* src/node_device/node_device_hal.c (dev_create): Silence coverity
warning.

A number of the error messages raised when parsing USB devices
refered to PCI devices by mistake

* src/qemu/qemu_conf.c: s/PCI/USB/ in qemuParseCommandLineUSB()

The USB hotplug method was mistakenly generating a PCI address
string

* src/qemu/qemu_driver.c: Fix USB hotplug device string

when the underlying qemu supports the drive/device model and the
controller has been added this way.
* src/qemu/qemu_driver.c: use qemuMonitorDelDevice() when detaching
  PCI controller and if supported
* src/qemu/qemu_monitor.[ch]: add new qemuMonitorDelDevice() function
* src/qemu/qemu_monitor_json.[ch]: JSON backend for DelDevice command
* src/qemu/qemu_monitor_text.[ch]: Text backend for DelDevice command

* src/qemu/qemu_driver.c: in qemudDomainDetachPciControllerDevice()
  when a controller is not present in the system anymore, the PCI
  address must be deleted from libvirt's hashtable because it can
  be re-used for other purposes.

* src/qemu/qemu_driver.c: in qemudDomainAttachDevice(), one must not
  delete the data part when the operation succeeds because it is
  required later on. The correct pattern to handlethe parsed
  representation of the device information on success
  is dev->data.controller = NULL; virDomainDeviceDefFree(dev);,
  which leaves the structure pointed at by data in memory.

* daemon/libvirtd.c (qemudWorker): Rewrite loop to silence a
warning.

* src/cpu/cpu_x86.c (x86Decode): Don't dereference NULL when passed
a NULL "models" pointer, or when passed a nonzero "nmodels" value
and a corresponding NULL models[i].

* src/phyp/phyp_driver.c (phypUUIDTable_Push): Move incr/decr
of ptr/nread into the loop where those variables are used.
Also, remove "exit" label and just-preceding "goto".

* src/openvz/openvz_driver.c (openvzDomainDefineCmd): Remove
useless increment of "max_veid".

* cfg.mk (sc_TAB_in_indentation): Also check .rng files.

* docs/schemas/capability.rng: Likewise.
* docs/schemas/network.rng: Likewise.
* docs/schemas/nodedev.rng: Likewise.
* docs/schemas/storagepool.rng: Likewise.
* docs/schemas/storagevol.rng: Likewise.
Use these commands:
t=$'\t'
git ls-files | grep '\.rng$' | xargs grep -lE "^ *$t" \
  | xargs perl -MText::Tabs -ni -le \
    '$m=/^( *\t[ \t]*)(.*)/; print $m ? expand($1) . $2 : $_'

* formatdomain.html.in: Document new clock options

Allow an arbitrary timezone with QEMU by setting the $TZ environment
variable when launching QEMU

* src/qemu/qemu_conf.c: Set TZ environment variable if a timezone
  is requested
* tests/qemuxml2argvtest.c: Add test case for timezones
* tests/qemuxml2argvdata/qemuxml2argv-clock-france.xml,
  tests/qemuxml2argvdata/qemuxml2argv-clock-france.args: Data
  for timezone tests

This extends the XML to allow for

  <clock offset='timezone' timezone='Europe/Paris'/>

This is useful if the admin has not configured any timezone on the
host OS, but still wants to synchronize a guest to a specific one.

* src/conf/domain_conf.h, src/conf/domain_conf.c: Support extra
  'timezone' attribute on clock configuration
* docs/schemas/domain.rng: Add 'timezone' attribute
* src/xen/xend_internal.c, src/xen/xm_internal.c: Reject configs
  with a configurable timezone

This allows QEMU guests to be started with an arbitrary clock
offset

The test case can't actually be enabled, since QEMU argv expects
an absolute timestring, and this will obviously change every
time the test runs :-( Hopefully QEMU will allow a relative
time offset in the future.

* src/qemu/qemu_conf.c, src/qemu/qemu_conf.h: Use the -rtc arg
  if available to support variable clock offset mode
* tests/qemuhelptest.c: Add QEMUD_CMD_FLAG_RTC for qemu 0.12.1
* qemuxml2argvdata/qemuxml2argv-clock-variable.args,
  qemuxml2argvdata/qemuxml2argv-clock-variable.xml,
  qemuxml2argvtest.c: Test case, except we can't actually enable
  it yet.

This introduces a third option for clock offset synchronization,
that allows an arbitrary / variable adjustment to be set. In
essence the XML contains the time delta in seconds, relative to
UTC.

  <clock offset='variable' adjustment='123465'/>

The difference from 'utc' mode, is that management apps should
track adjustments and preserve them at next reboot.

* docs/schemas/domain.rng: Schema for new clock mode
* src/conf/domain_conf.c, src/conf/domain_conf.h: Parse
  new clock time delta
* src/libvirt_private.syms, src/util/xml.c, src/util/xml.h: Add
  virXPathLongLong() method

The XML will soon be extended to allow more than just a simple
localtime/utc boolean flag. This change replaces the plain
'int localtime' with a separate struct to prepare for future
extension

* src/conf/domain_conf.c, src/conf/domain_conf.h: Add a new
  virDomainClockDef structure
* src/libvirt_private.syms: Export virDomainClockOffsetTypeToString
  and virDomainClockOffsetTypeFromString
* src/qemu/qemu_conf.c, src/vbox/vbox_tmpl.c, src/xen/xend_internal.c,
  src/xen/xm_internal.c: Updated to use new structure for localtime

* src/node_device/node_device_udev.c (udevEnumerateDevices): Remove
unnecessary call to udev_list_entry_get_name.

* src/qemu/qemu_conf.c (qemudNetworkIfaceConnect): Remove extraneous
virSaveLastError call, whose result was unused.

* tools/virsh.c (cmdPoolDiscoverSources): Always initialize srcSpec.
Otherwise, clang would report that srcSpec could be used uninitialized
in the call to virConnectFindStoragePoolSources.