This patch improve all the API in virnetlink.c to support
all kinds of netlink protocols, and make all netlink sockets
be able to join in groups.
Signed-off-by: NTang Chen <tangchen@cn.fujitsu.com>

Per the FSF address could be changed from time to time, and GNU
recommends the following now: (http://www.gnu.org/licenses/gpl-howto.html)

  You should have received a copy of the GNU General Public License
  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.

This patch removes the explicit FSF address, and uses above instead
(of course, with inserting 'Lesser' before 'General').

Except a bunch of files for security driver, all others are changed
automatically, the copyright for securify files are not complete,
that's why to do it manually:

  src/security/security_selinux.h
  src/security/security_driver.h
  src/security/security_selinux.c
  src/security/security_apparmor.h
  src/security/security_apparmor.c
  src/security/security_driver.c

This removes nearly all the per-file error reporting macros
from the code in src/util/. A few custom macros remain for the
case, where the file needs to report errors with a variety of
different codes or parameters
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Introduce new members in the virMacAddr 'class'
- virMacAddrSet: set virMacAddr from a virMacAddr
- virMacAddrSetRaw: setting virMacAddr from raw 6 byte MAC address buffer
- virMacAddrGetRaw: writing virMacAddr into raw 6 byte MAC address buffer
- virMacAddrCmp: comparing two virMacAddr
- virMacAddrCmpRaw: comparing a virMacAddr with a raw 6 byte MAC address buffer

then replace raw MAC addresses by replacing

- 'unsigned char *' with virMacAddrPtr
- 'unsigned char ... [VIR_MAC_BUFLEN]' with virMacAddr

and introduce usage of above functions where necessary.

Until now, virNetlinkCommand has assumed that the nl_pid in the source
address of outgoing netlink messages should always be the return value
of getpid(). In most cases it actually doesn't matter, but in the case
of communication with lldpad, lldpad saves this info and later uses it
to send netlink messages back to libvirt. A recent patch to fix Bug
816465 changed the order of the universe such that the netlink event
service socket is no longer bound with nl_pid == getpid(), so lldpad
could no longer send unsolicited messages to libvirtd. Adding src_pid
as an argument to virNetlinkCommand() is the first step in notifying
lldpad of the proper address of the netlink event service socket.

Below patch fixes the following coverity findings

Error: OVERRUN_STATIC:
/libvirt/src/qemu/qemu_command.c:152:
overrun-buffer-val: Overrunning static array "net->mac" of size 6 bytes by passing it as an argument to a function which indexes it at byte position 15.
/libvirt/src/util/virnetdevmacvlan.c:948:
access_dbuff_const: Calling "virNetDevMacVLanVPortProfileRegisterCallback" indexes array "macaddress" at byte position 15.
/libvirt/src/util/virnetdevmacvlan.c:773:
access_dbuff_const: Calling "memcpy" indexes array "macaddress" with index "16UL" at byte position 15.

Error: OVERRUN_STATIC:
/libvirt/src/qemu/qemu_migration.c:2744:
overrun-buffer-val: Overrunning static array "net->mac" of size 6 bytes by passing it as an argument to a function which indexes it at byte position 15.
/libvirt/src/util/virnetdevmacvlan.c:773:
access_dbuff_const: Calling "memcpy" indexes array "macaddress" with index "16UL" at byte position 15.

Error: OVERRUN_STATIC:
/libvirt/src/qemu/qemu_driver.c:435:
overrun-buffer-val: Overrunning static array "net->mac" of size 6 bytes by passing it as an argument to a function which indexes it at byte position 15.
/libvirt/src/util/virnetdevmacvlan.c:1036:
access_dbuff_const: Calling "virNetDevMacVLanVPortProfileRegisterCallback" indexes array "macaddress" at byte position 15.
/libvirt/src/util/virnetdevmacvlan.c:773:
access_dbuff_const: Calling "memcpy" indexes array "macaddress" with index "16UL" at byte position 15.

Use embedded buffers for the MAC addresses and the VM's UUID.

Currently upon a migration a callback is created when a 802.1qbg link
is set to PREASSOCIATE, this should not happen because this is a no-op
on most switches, and does not lead to an ASSOCIATE state.  This patch
only creates callbacks when CREATE or RESTORE is requested.  Migration
and libvirtd restart scenarios are already handled elsewhere.
Signed-off-by: ND. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>

This patch adds a netlink callback when migrating a VEPA enabled
virtual machine.  It fixes a Bug where a VM would not request a port
association when it was cleared by lldpad.

This patch requires the latest git version of lldpad to work.
Signed-off-by: ND. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>

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>

When libvirtd is restarted, also restart the netlink event
message callbacks for existing VEPA connections and send
a message to lldpad for these existing links, so it learns
the new libvirtd pid.
Signed-off-by: ND. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>

There are several functions that call virNetlinkCommand, and they all
follow a common pattern, with three exit labels: err_exit (or
cleanup), malformed_resp, and buffer_too_small. All three of these
labels do their own cleanup and have their own return. However, the
malformed_resp label usually frees the same items as the
cleanup/err_exit label, and the buffer_too_small label just doesn't
free recvbuf (because it's known to always be NULL at the time we goto
buffer_too_small.

In order to simplify and standardize the code, I've made the following
changes to all of these functions:

1) err_exit is replaced with the more libvirt-ish "cleanup", which
   makes sense because in all cases this code is also executed in the
   case of success, so labelling it err_exit may be confusing.

2) rc is initialized to -1, and set to 0 just before the cleanup
   label. Any code that currently sets rc = -1 is made to instead goto
   cleanup.

3) malformed_resp and buffer_too_small just log their error and goto
   cleanup. This gives us a single return path, and a single place to
   free up resources.

4) In one instance, rather then logging an error immediately, a char*
   msg was pointed to an error string, then goto cleanup (and cleanup
   would log an error if msg != NULL). It takes no more lines of code
   to just log the message as we encounter it.

This patch should have 0 functional effects.

This patch includes the following changes to virnetdevmacvlan.c and
virnetdevvportprofile.c:

 - removes some netlink functions which are now available in
   virnetdev.c

 - Adds a vf argument to all port profile functions.

For 802.1Qbh devices, the port profile calls can use a vf argument if
passed by the caller. If the vf argument is -1 it will try to derive the vf
if the device passed is a virtual function.

For 802.1Qbg devices, This patch introduces a null check for the device
argument because during port profile assignment on a hostdev, this argument
can be null.
Signed-off-by: NRoopa Prabhu <roprabhu@cisco.com>

Commit 723d5c (added after the release of 0.9.10) adds a
NetlinkEventClient for each interface sent to
virNetDevMacVLanCreateWithVPortProfile. This should only be done if
the interface actually *has* a virtPortProfile, otherwise the event
handler would be a NOP. The bigger problem is that part of the setup
to create the NetlinkEventClient is to do a memcpy of virtPortProfile
- if it's NULL, this triggers a segv.

This patch just qualifies the code that adds the client - if
virtPortProfile is NULL, it's skipped.

Add de-association handling for 802.1qbg (vepa) via lldpad
netlink messages. Also adds the possibility to perform an
association request without waiting for a confirmation.
Signed-off-by: ND. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>

Rename the src/util/netlink files to src/util/virnetlink to
better fit the naming scheme. Also rename nlComm to virNetlinkCommand.
Signed-off-by: ND. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>

Move the virMacAddrXXX functions out of util.[ch] and into a
new dedicate file virmacaddr.[ch]

Detected by Coverity. Leak introduced in commit 90074ecf.
Signed-off-by: NAlex Jia <ajia@redhat.com>
Signed-off-by: NEric Blake <eblake@redhat.com>

Since commit 6ec8288a, compilation has failed on RHEL 5:

util/virnetdevmacvlan.c:672: error: conflicting types for 'virNetDevMacVLanCreateWithVPortProfile'

* src/util/virnetdevmacvlan.c
(virNetDevMacVLanCreateWithVPortProfile): Add missing parameter.

Update virNetDevMacVLanCreateWithVPortProfile to allow creation
of plain macvlan devices, as well as macvtap devices. The former
is useful for LXC containers

* src/qemu/qemu_command.c: Explicitly request a macvtap device
* src/util/virnetdevmacvlan.c, src/util/virnetdevmacvlan.h: Add
  new flag to allow switching between macvlan and macvtap
  creation

Move the ifaceMacvtapLinkDump and ifaceGetNthParent functions
into virnetdevvportprofile.c since they are specific to that
code. This avoids polluting the headers with the Linux specific
netlink data types

* src/util/interface.c, src/util/interface.h: Move
  ifaceMacvtapLinkDump and ifaceGetNthParent functions and delete
  remaining file
* src/util/virnetdevvportprofile.c: Add ifaceMacvtapLinkDump
  and ifaceGetNthParent functions
* src/network/bridge_driver.c, src/nwfilter/nwfilter_gentech_driver.c,
  src/nwfilter/nwfilter_learnipaddr.c, src/util/virnetdevmacvlan.c:
  Remove include of interface.h

Rename the ifaceGetIndex method to virNetDevGetIndex and
ifaceGetVlanID to virNetDevGetVLanID. Also change the error
reporting behaviour to always raise errors and return -1 on
failure

* util/interface.c, util/interface.h: Rename ifaceGetIndex
  and ifaceGetVLAN
* nwfilter/nwfilter_gentech_driver.c, nwfilter/nwfilter_learnipaddr.c,
  nwfilter/nwfilter_learnipaddr.c, util/virnetdevvportprofile.c: Update
  for API renames and error handling changes

Rename ifaceReplaceMacAddress to virNetDevReplaceMacAddress
and ifaceRestoreMacAddress to virNetDevRestoreMacAddress.

* util/interface.c, util/interface.h, util/virnetdevmacvlan.c:
  Rename APIs

Move the low level macvlan creation APIs into the
virnetdevmacvlan.c file where they more naturally
belong

* util/interface.c, util/interface.h: Remove virNetDevMacVLanCreate
  and virNetDevMacVLanDelete
* util/virnetdevmacvlan.c, util/virnetdevmacvlan.h: Add
  virNetDevMacVLanCreate and virNetDevMacVLanDelete

Rename ifaceMacvtapLinkAdd to virNetDevMacVLanCreate and
ifaceLinkDel to virNetDevMacVLanDelete. Strictly speaking
the latter isn't restricted to macvlan devices, but that's
the only use libvirt has for it.

* util/interface.c, util/interface.h,
  util/virnetdevmacvlan.c: Rename APIs

Rename virNetDevMacVLanCreate to virNetDevMacVLanCreateWithVPortProfile
and virNetDevMacVLanDelete to virNetDevMacVLanDeleteWithVPortProfile

To make way for renaming the other macvlan creation APIs in
interface.c

* util/virnetdevmacvlan.c, util/virnetdevmacvlan.h,
  qemu/qemu_command.c, qemu/qemu_hotplug.c, qemu/qemu_process.c:
  Rename APIs

Rename the macvtap.c file to virnetdevmacvlan.c to reflect its
functionality. Move the port profile association code out into
virnetdevvportprofile.c. Make the APIs available unconditionally
to callers

* src/util/macvtap.h: rename to src/util/virnetdevmacvlan.h,
* src/util/macvtap.c: rename to src/util/virnetdevmacvlan.c
* src/util/virnetdevvportprofile.c, src/util/virnetdevvportprofile.h:
  Pull in vport association code
* src/Makefile.am, src/conf/domain_conf.h, src/qemu/qemu_conf.c,
  src/qemu/qemu_conf.h, src/qemu/qemu_driver.c: Update include
  paths & remove conditional compilation