Am 11.10.2011 05:10, schrieb Supriya Kannery: > Enhance "info block" to display hostcache setting for each > block device. > > Example: > (qemu) info block > ide0-hd0: removable=0 file=../sles11-32.raw ro=0 drv=raw encrypted=0 > > Enhanced to display "hostcache" setting: > (qemu) info block > ide0-hd0: removable=0 hostcache=1 file=../sles11-32.raw ro=0 drv=raw > encrypted=0 > > Signed-off-by: Supriya Kannery <supri...@linux.vnet.ibm.com> > > --- > block.c | 20 ++++++++++++++++---- > qmp-commands.hx | 2 ++ > 2 files changed, 18 insertions(+), 4 deletions(-) > > Index: qemu/qmp-commands.hx > =================================================================== > --- qemu.orig/qmp-commands.hx > +++ qemu/qmp-commands.hx > @@ -1142,6 +1142,7 @@ Each json-object contain the following: > - "locked": true if the device is locked, false otherwise (json-bool) > - "tray-open": only present if removable, true if the device has a tray, > and it is open (json-bool) > +- "hostcache": true if host pagecache enabled, false otherwise (json-bool) > - "inserted": only present if the device is inserted, it is a json-object > containing the following: > - "file": device file name (json-string) > @@ -1163,6 +1164,7 @@ Example: > { > "device":"ide0-hd0", > "locked":false, > + "hostcache":false, > "removable":false, > "inserted":{ > "ro":false, > Index: qemu/block.c > =================================================================== > --- qemu.orig/block.c > +++ qemu/block.c > @@ -1866,6 +1866,15 @@ static void bdrv_print_dict(QObject *obj > monitor_printf(mon, " tray-open=%d", > qdict_get_bool(bs_dict, "tray-open")); > } > + > + if (qdict_haskey(bs_dict, "open_flags")) { > + int open_flags = qdict_get_int(bs_dict, "open_flags"); > + if (open_flags & BDRV_O_NOCACHE) > + monitor_printf(mon, " hostcache=0"); > + else > + monitor_printf(mon, " hostcache=1");
Coding style requires braces. > + } > + > if (qdict_haskey(bs_dict, "inserted")) { > QDict *qdict = qobject_to_qdict(qdict_get(bs_dict, "inserted")); > > @@ -1903,11 +1912,14 @@ void bdrv_info(Monitor *mon, QObject **r > QDict *bs_dict; > > bs_obj = qobject_from_jsonf("{ 'device': %s, 'type': 'unknown', " > - "'removable': %i, 'locked': %i }", > + "'removable': %i, 'locked': %i, " > + "'hostcache': %i }", > bs->device_name, > bdrv_dev_has_removable_media(bs), > - bdrv_dev_is_medium_locked(bs)); > + bdrv_dev_is_medium_locked(bs), > + !(bs->open_flags & BDRV_O_NOCACHE)); > bs_dict = qobject_to_qdict(bs_obj); > + qdict_put(bs_dict, "open_flags", qint_from_int(bs->open_flags)); No. This adds a open_flags field to the QMP structure that is transferred to clients. This is wrong, open_flags is an internal thing that should never be visible on an interface. In bdrv_print_dict, access the hostcache field that you introduced, it provides the same information. Kevin