Re: [Qemu-devel] [v9 Patch 1/6 - updated]Qemu: Enhance "info block" to display host cache setting

[Luiz Capitulino <lcapitulino@redhat.com>]

On Fri, 11 Nov 2011 15:39:29 +0530
Supriya Kannery <supriyak@linux.vnet.ibm.com> wrote:

> On 11/11/2011 12:17 PM, Supriya Kannery wrote:
>  > Enhance "info block" to display hostcache setting for each
>  > block device.
>  >
>  >
>  >   ##
>  > Index: qemu/qapi-types.h
>  > ===================================================================
>  > --- qemu.orig/qapi-types.h
>  > +++ qemu/qapi-types.h
>  > @@ -383,6 +383,7 @@ struct BlockInfo
>  >   {
>  >       char * device;
>  >       char * type;
>  > +    bool hostcache;
>  >       bool removable;
>  >       bool locked;
>  >       bool has_inserted;
>  > Index: qemu/block.c
> 
> hostcache gets added to qapi-types.h from
> the change done in qapi-schema.json. Hence
> above change has to be ignored. Pls find
> updated patch.

git am says this patch is corrupted. Otherwise the QAPI changes look ok
to me.

> 
> 
> *********************************************************************
> Enhance "info block" to display hostcache setting for each
> block device.
> 
> Example:
> (qemu) info block
> ide0-hd0: removable=0 file=../rhel6-32.raw ro=0 drv=raw encrypted=0
> 
> Enhanced to display "hostcache" setting:
> (qemu) info block
> ide0-hd0: removable=0 hostcache=1 file=../rhel6-32.raw ro=0 drv=raw 
> encrypted=0
> 
> Signed-off-by: Supriya Kannery <supriyak@linux.vnet.ibm.com>
> 
> ---
>   block.c         |   20 ++++++++++++++++----
>   qmp-commands.hx |    2 ++
>   2 files changed, 18 insertions(+), 4 deletions(-)
> 
> Index: qemu/qapi-schema.json
> ===================================================================
> --- qemu.orig/qapi-schema.json
> +++ qemu/qapi-schema.json
> @@ -409,6 +409,8 @@
>   # @locked: True if the guest has locked this device from having its media
>   #          removed
>   #
> +# @hostcache: True if host pagecache is enabled.
> +#
>   # @tray_open: #optional True if the device has a tray and it is open
>   #             (only present if removable is true)
>   #
> @@ -422,7 +424,7 @@
>   ##
>   { 'type': 'BlockInfo',
>     'data': {'device': 'str', 'type': 'str', 'removable': 'bool',
> -           'locked': 'bool', '*inserted': 'BlockDeviceInfo',
> +           'locked': 'bool','hostcache': 'bool', '*inserted': 
> 'BlockDeviceInfo',
>              '*tray_open': 'bool', '*io-status': 'BlockDeviceIoStatus'} }
> 
>   ##
> Index: qemu/block.c
> ===================================================================
> --- qemu.orig/block.c
> +++ qemu/block.c
> @@ -1839,6 +1839,7 @@ BlockInfoList *qmp_query_block(Error **e
>           info->value->device = g_strdup(bs->device_name);
>           info->value->type = g_strdup("unknown");
>           info->value->locked = bdrv_dev_is_medium_locked(bs);
> +        info->value->hostcache = !(bs->open_flags & BDRV_O_NOCACHE);
>           info->value->removable = bdrv_dev_has_removable_media(bs);
> 
>           if (bdrv_dev_has_removable_media(bs)) {
> Index: qemu/hmp.c
> ===================================================================
> --- qemu.orig/hmp.c
> +++ qemu/hmp.c
> @@ -199,6 +199,8 @@ void hmp_info_block(Monitor *mon)
>               monitor_printf(mon, " tray-open=%d", info->value->tray_open);
>           }
> 
> +        monitor_printf(mon, " hostcache=%d", info->value->hostcache);
> +
>           if (info->value->has_io_status) {
>               monitor_printf(mon, " io-status=%s",
>  
> BlockDeviceIoStatus_lookup[info->value->io_status]);
> 
>