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2019-08-16Clean up inclusion of sysemu/sysemu.hMarkus Armbruster1-1/+0
In my "build everything" tree, changing sysemu/sysemu.h triggers a recompile of some 5400 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). Almost a third of its inclusions are actually superfluous. Delete them. Downgrade two more to qapi/qapi-types-run-state.h, and move one from char/serial.h to char/serial.c. hw/semihosting/config.c, monitor/monitor.c, qdev-monitor.c, and stubs/semihost.c define variables declared in sysemu/sysemu.h without including it. The compiler is cool with that, but include it anyway. This doesn't reduce actual use much, as it's still included into widely included headers. The next commit will tackle that. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-27-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2019-08-16Include qemu/main-loop.h lessMarkus Armbruster1-0/+1
In my "build everything" tree, changing qemu/main-loop.h triggers a recompile of some 5600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). It includes block/aio.h, which in turn includes qemu/event_notifier.h, qemu/notify.h, qemu/processor.h, qemu/qsp.h, qemu/queue.h, qemu/thread-posix.h, qemu/thread.h, qemu/timer.h, and a few more. Include qemu/main-loop.h only where it's needed. Touching it now recompiles only some 1700 objects. For block/aio.h and qemu/event_notifier.h, these numbers drop from 5600 to 2800. For the others, they shrink only slightly. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190812052359.30071-21-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2016-07-19qapi: Change Netdev into a flat unionEric Blake1-3/+3
This is a mostly-mechanical conversion that creates a new flat union 'Netdev' QAPI type that covers all the branches of the former 'NetClientOptions' simple union, where the branches are now listed in a new 'NetClientDriver' enum rather than generated from the simple union. The existence of a flat union has no change to the command line syntax accepted for new code, and will make it possible for a future patch to switch the QMP command to parse a boxed union for no change to valid QMP; but it does have some ripple effect on the C code when dealing with the new types. While making the conversion, note that the 'NetLegacy' type remains unchanged: it applies only to legacy command line options, and will not be ported to QMP, so it should remain a wrapper around a simple union; to avoid confusion, the type named 'NetClientOptions' is now gone, and we introduce 'NetLegacyOptions' in its place. Then, in the C code, we convert from NetLegacy to Netdev as soon as possible, so that the bulk of the net stack only has to deal with one QAPI type, not two. Note that since the old legacy code always rejected 'hubport', we can just omit that branch from the new 'NetLegacyOptions' simple union. Based on an idea originally by Zoltán Kővágó <DirtY.iCE.hu@gmail.com>: Message-Id: <01a527fbf1a5de880091f98cf011616a78adeeee.1441627176.git.DirtY.iCE.hu@gmail.com> although the sed script in that patch no longer applies due to other changes in the tree since then, and I also did some manual cleanups (such as fixing whitespace to keep checkpatch happy). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1468468228-27827-13-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Fixup from Eric squashed in] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-07-19net: use Netdev instead of NetClientOptions in client initKővágó, Zoltán1-3/+3
This way we no longer need NetClientOptions and can convert Netdev into a flat union. Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <93ffdfed7054529635e6acb935150d95dc173a12.1441627176.git.DirtY.iCE.hu@gmail.com> [rework net_client_init1() to pass Netdev by copying from NetdevLegacy, rather than merging the two types - which means that we still need NetClientOptions after all. Rebase to qapi changes. The bulk of the patch is mechanical, replacing 'opts' by 'netdev->opts', while net_client_init1() takes care of converting between legacy and modern types.] Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1468468228-27827-2-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-03-18qapi: Don't special-case simple union wrappersEric Blake1-1/+1
Simple unions were carrying a special case that hid their 'data' QMP member from the resulting C struct, via the hack method QAPISchemaObjectTypeVariant.simple_union_type(). But by using the work we started by unboxing flat union and alternate branches, coupled with the ability to visit the members of an implicit type, we can now expose the simple union's implicit type in qapi-types.h: | struct q_obj_ImageInfoSpecificQCow2_wrapper { | ImageInfoSpecificQCow2 *data; | }; | | struct q_obj_ImageInfoSpecificVmdk_wrapper { | ImageInfoSpecificVmdk *data; | }; ... | struct ImageInfoSpecific { | ImageInfoSpecificKind type; | union { /* union tag is @type */ | void *data; |- ImageInfoSpecificQCow2 *qcow2; |- ImageInfoSpecificVmdk *vmdk; |+ q_obj_ImageInfoSpecificQCow2_wrapper qcow2; |+ q_obj_ImageInfoSpecificVmdk_wrapper vmdk; | } u; | }; Doing this removes asymmetry between QAPI's QMP side and its C side (both sides now expose 'data'), and means that the treatment of a simple union as sugar for a flat union is now equivalent in both languages (previously the two approaches used a different layer of dereferencing, where the simple union could be converted to a flat union with equivalent C layout but different {} on the wire, or to an equivalent QMP wire form but with different C representation). Using the implicit type also lets us get rid of the simple_union_type() hack. Of course, now all clients of simple unions have to adjust from using su->u.member to using su->u.member.data; while this touches a number of files in the tree, some earlier cleanup patches helped minimize the change to the initialization of a temporary variable rather than every single member access. The generated qapi-visit.c code is also affected by the layout change: |@@ -7393,10 +7393,10 @@ void visit_type_ImageInfoSpecific_member | } | switch (obj->type) { | case IMAGE_INFO_SPECIFIC_KIND_QCOW2: |- visit_type_ImageInfoSpecificQCow2(v, "data", &obj->u.qcow2, &err); |+ visit_type_q_obj_ImageInfoSpecificQCow2_wrapper_members(v, &obj->u.qcow2, &err); | break; | case IMAGE_INFO_SPECIFIC_KIND_VMDK: |- visit_type_ImageInfoSpecificVmdk(v, "data", &obj->u.vmdk, &err); |+ visit_type_q_obj_ImageInfoSpecificVmdk_wrapper_members(v, &obj->u.vmdk, &err); | break; | default: | abort(); Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1458254921-17042-13-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-02-04net: Clean up includesPeter Maydell1-1/+1
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-11-git-send-email-peter.maydell@linaro.org
2015-11-27tap-win32: disable broken async write pathAndrew Baumann1-10/+36
The code under the TUN_ASYNCHRONOUS_WRITES path makes two incorrect assumptions about the behaviour of the WriteFile API for overlapped file handles. First, WriteFile does not update the lpNumberOfBytesWritten parameter when the write completes asynchronously (the number of bytes written is known only when the operation completes). Second, the buffer shouldn't be touched (or freed) until the operation completes. This led to at least one bug where tap_win32_write returned zero bytes written, which in turn caused further writes ("receives") to be disabled for that device. This change disables the asynchronous write path, while keeping most of the code around in case someone sees value in resurrecting it. It also adds some conditional debug output, similar to the read path. Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Acked-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Jason Wang <jasowang@redhat.com>
2015-11-27tap-win32: skip unexpected nodes during registry enumerationAndrew Baumann1-1/+2
In order to find a named tap device, get_device_guid() enumerates children of HKLM\SYSTEM\CCS\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318} (aka NETWORK_CONNECTIONS_KEY). For each child, it then looks for a "Connection" subkey, but if this key doesn't exist, it aborts the entire search. This was observed to fail on at least one Windows 10 machine, where there is an additional child of NETWORK_CONNECTIONS_KEY (named "Descriptions"). Since registry enumeration doesn't guarantee any particular sort order, we should continue to search for matching children rather than aborting the search. Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Jason Wang <jasowang@redhat.com>
2015-11-02net: Convert to new qapi union layoutEric Blake1-2/+2
We have two issues with our qapi union layout: 1) Even though the QMP wire format spells the tag 'type', the C code spells it 'kind', requiring some hacks in the generator. 2) The C struct uses an anonymous union, which places all tag values in the same namespace as all non-variant members. This leads to spurious collisions if a tag value matches a non-variant member's name. Make the conversion to the new layout for net-related code. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1445898903-12082-18-git-send-email-eblake@redhat.com> [Commit message tweaked slightly] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-06-19tap: fix non-linux buildMichael S. Tsirkin1-0/+10
tap_fd_set_vnet_le/tap_fd_set_vnet_be was missing, fix it up. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
2015-05-27net: Permit incremental conversion of init functions to ErrorMarkus Armbruster1-1/+2
Error reporting for netdev_add is broken: the net_client_init_fun[] report the actual errors with (at best) error_report(), and their caller net_client_init1() makes up a generic error on top. For command line and HMP, this produces an mildly ugly error cascade. In QMP, the actual errors go to stderr, and the generic error becomes the command's error reply. To fix this, we need to convert the net_client_init_fun[] to Error. To permit fixing them one by one, add an Error ** parameter to the net_client_init_fun[]. If the call fails without returning an Error, make up the same generic Error as before. But if it returns one, use that instead. Since none of them does so far, no functional change. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1431691143-1015-3-git-send-email-armbru@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-02-25net: make tap offloading callbacks staticVincenzo Maffione1-6/+6
Since TAP offloadings are manipulated through a new API, it's not necessary to export them in include/net/tap.h anymore. Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-02-25net: TAP uses NetClientInfo offloading callbacksVincenzo Maffione1-43/+49
The TAP NetClientInfo structure is inizialized with the TAP-specific functions that manipulates offloading features. Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-02-25net: change vnet-hdr TAP prototypesVincenzo Maffione1-4/+4
The tap_has_vnet_hdr() and tap_has_vnet_hdr_len() functions used to return int, even though they only return true/false values. This patch changes the prototypes to return bool. Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-02-01tap: support enabling or disabling a queueJason Wang1-0/+10
This patch introduce a new bit - enabled in TAPState which tracks whether a specific queue/fd is enabled. The tap/fd is enabled during initialization and could be enabled/disabled by tap_enalbe() and tap_disable() which calls platform specific helpers to do the real work. Polling of a tap fd can only done when the tap was enabled. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: tap: use abort() instead of assert(0)Jason Wang1-1/+1
Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01net: tap: using bool instead of bitfieldJason Wang1-3/+3
Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-22net: Add missing include statement (fix compiler warnings for MinGW)Stefan Weil1-0/+1
These and some more compiler warnings were caused by a recent commit: net/tap-win32.c:724: warning: no previous prototype for ‘tap_has_ufo’ net/tap-win32.c:729: warning: no previous prototype for ‘tap_has_vnet_hdr’ ... Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-12-19softmmu: move include files to include/sysemu/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19net: reorganize headersPaolo Bonzini1-2/+2
Move public headers to include/net, and leave private headers in net/. Put the virtio headers in include/net/tap.h, removing the multiple copies that existed. Leave include/net/tap.h as the interface for NICs, and net/tap_int.h as the interface for OS-specific parts of the tap backend. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-07Fix spelling (prefered -> preferred)Stefan Weil1-3/+4
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-10-30tap-win32: stubs to fix win32 buildMichael S. Tsirkin1-0/+10
Add missing stubs to win32 to fix link failure. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-10-19net/tap-win32: Fix compiler warning caused by missing include statementStefan Weil1-0/+1
The include file for net_init_tap was missing: net/tap-win32.c:703: warning: no previous prototype for ‘net_init_tap’ Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-10-08net: consolidate NetClientState header files into onePaolo Bonzini1-1/+1
This patch doesn't seem much useful alone, I must admit. However, it makes sense as part of the upcoming directory reorganization, where I want to have include/net/tap.h as the net<->hw interface for tap. Then having both net/tap.h and include/net/tap.h does not work. "Fixed" by moving all the init functions to a single header file net/clients.h. The patch also adopts a uniform style for including net/*.h files from net/*.c, without the net/ path. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
2012-08-01net: Rename vc local variables to ncStefan Hajnoczi1-4/+4
Now that VLANClientState has been renamed to NetClientState all 'vc' local variables should be 'nc'. Much of the code already used 'nc' but there are places where 'vc' needs to be renamed. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2012-08-01net: Rename VLANClientState to NetClientStateStefan Hajnoczi1-11/+11
The vlan feature is no longer part of net core. Rename VLANClientState to NetClientState because net clients are not explicitly associated with a vlan at all, instead they have a peer net client to which they are connected. This patch is a mechanical search-and-replace except for a few whitespace fixups where changing VLANClientState to NetClientState misaligned whitespace. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2012-08-01net: Drop vlan argument to qemu_new_net_client()Stefan Hajnoczi1-1/+1
Since hubs are now used to implement the 'vlan' feature and the vlan argument is always NULL, remove the argument entirely and update all net clients that use qemu_new_net_client(). Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2012-08-01net: Use hubs for the vlan featureStefan Hajnoczi1-4/+4
Stop using the special-case vlan code in net.c. Instead use the hub net client to implement the vlan feature. The next patch will remove vlan code from net.c completely. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2012-07-23remove unused QemuOpts parameter from net init functionsLaszlo Ersek1-2/+2
v1->v2: - unchanged v2->v3: - keep "qemu-option.h" included in "net/slirp.h" Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-23convert net_init_tap() to NetClientOptionsLaszlo Ersek1-5/+6
Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-23convert net_client_init() to OptsVisitorLaszlo Ersek1-1/+2
The net_client_init() prototype is kept intact. Based on "is_netdev", the QemuOpts-rooted QemuOpt-list is parsed as a Netdev or a NetLegacy. The original meat of net_client_init() is moved to and simplified in net_client_init1(): Fields not common between -net and -netdev are clearly separated. Getting the name for the init functions is cleaner: Netdev::id is mandatory, and all init functions handle a NULL NetLegacy::name. NetLegacy::vlan explicitly depends on -net (see below). Verifying the "type=" option for -netdev can be turned into a switch. Format validation with qemu_opts_validate() can be removed because the visitor covers it. Relatedly, the "net_client_types" array is reduced to an array of init functions that can be directly indexed by opts->kind. (Help text is available in the schema JSON.) The outermost negation in the condition around qemu_find_vlan() was flattened, because it expresses the dependent code's requirements more clearly. VLAN lookup is avoided if there's no init function to pass the VLAN to. Whenever the value of type=... is needed, we substitute NetClientOptionsKind_lookup[kind]. The individual init functions are not converted yet, thus the original QemuOpts instance is passed transparently. v1->v2: - NetLegacy::name is optional. Tracked it through all init functions: they all handle a NULL name. Updated commit message accordingly. v2->v3: - NetLegacy::id is allowed and takes precedence over NetLegacy::name. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-23hw, net: "net_client_type" -> "NetClientOptionsKind" (qapi-generated)Laszlo Ersek1-1/+1
NET_CLIENT_TYPE_ -> NET_CLIENT_OPTIONS_KIND_ Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-06-04net: purge the monitor object from all init functionsLuiz Capitulino1-1/+1
The only backend that really uses it is the socket one, which calls monitor_get_fd(). But it can use 'cur_mon' instead. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Reviewed-By: Laszlo Ersek <lersek@redhat.com>
2011-02-25Fixing tap adapter for win32Pavel Dovgaluk1-1/+1
This fix allows connection of internal VLAN to the external TAP interface. If tap_win32_write function always returns 0, the TAP network interface in QEMU is disabled. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-10-13Delete write only variablesBlue Swirl1-3/+2
Compiling with GCC 4.6.0 20100925 produced warnings like: /src/qemu/net/tap-win32.c: In function 'tap_win32_open': /src/qemu/net/tap-win32.c:582:12: error: variable 'hThread' set but not used [-Werror=unused-but-set-variable] Fix by removing the unused variables. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-09-07tap: add APIs for vnet header lengthMichael S. Tsirkin1-0/+9
Add APIs to control host header length. First user will be vhost-net. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2010-04-02Fix build on mingw32Anthony Liguori1-0/+5
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-27Fix BSD and win32 buildsBlue Swirl1-0/+1
CC net/tap-bsd.o /src/qemu/net/tap-bsd.c: In function `tap_open': /src/qemu/net/tap-bsd.c:93: warning: implicit declaration of function `error_report' CC sparc-softmmu/../net/tap-win32.o cc1: warnings being treated as errors /src/qemu/target-sparc/../net/tap-win32.c: In function 'net_init_tap': /src/qemu/target-sparc/../net/tap-win32.c:709: warning: implicit declaration of function 'error_report' Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-03-16error: Replace qemu_error() by error_report()Markus Armbruster1-1/+1
error_report() terminates the message with a newline. Strip it it from its arguments. This fixes a few error messages lacking a newline: net_handle_fd_param()'s "No file descriptor named %s found", and tap_open()'s "vnet_hdr=1 requested, but no kernel support for IFF_VNET_HDR available" (all three versions). There's one place that passes arguments without newlines intentionally: load_vmstate(). Fix it up.
2010-02-19net: Fix bogus "Warning: vlan 0 with no nics" with -deviceMarkus Armbruster1-4/+0
net_check_clients() prints this when an VLAN has host devices, but no guest devices. It uses VLANState members nb_guest_devs and nb_host_devs to keep track of these devices. However, -device does not update nb_guest_devs, only net_init_nic() does that, for -net nic. Check the VLAN clients directly, and remove the counters. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-12-04win32: fix variable use before initializationBlue Swirl1-2/+2
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-12-03net: convert tap-win32 to NetClientInfoMark McLoughlin1-16/+23
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-30net: move more stuff into net/tap-win32.c, add net/tap.hMark McLoughlin1-2/+46
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-30net: move tap-win32.c under net/Mark McLoughlin1-0/+690
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>