Enhance "info block" to display hostcache setting for each block device.
Example: (qemu) info block ide0-hd0: type=hd removable=0 file=../rhel6-32.qcow2 ro=0 drv=qcow2 encrypted=0 Enhanced to display "hostcache" setting: (qemu) info block ide0-hd0: type=hd removable=0 hostcache=true file=../rhel6-32.qcow2 ro=0 drv=qcow2 encrypted=0 Signed-off-by: Supriya Kannery <supri...@in.ibm.com> --- block.c | 21 +++++++++++++++++---- qmp-commands.hx | 2 ++ 2 files changed, 19 insertions(+), 4 deletions(-) Index: qemu/block.c =================================================================== --- qemu.orig/block.c +++ qemu/block.c @@ -1713,6 +1713,14 @@ static void bdrv_print_dict(QObject *obj monitor_printf(mon, " locked=%d", qdict_get_bool(bs_dict, "locked")); } + 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"); + } + if (qdict_haskey(bs_dict, "inserted")) { QDict *qdict = qobject_to_qdict(qdict_get(bs_dict, "inserted")); @@ -1749,13 +1757,18 @@ void bdrv_info(Monitor *mon, QObject **r QObject *bs_obj; bs_obj = qobject_from_jsonf("{ 'device': %s, 'type': 'unknown', " - "'removable': %i, 'locked': %i }", - bs->device_name, bs->removable, - bs->locked); + "'removable': %i, 'locked': %i, " + "'hostcache': %s }", + bs->device_name, bs->removable, + bs->locked, + (bs->open_flags & BDRV_O_NOCACHE) ? + "false" : "true"); + + QDict *bs_dict = qobject_to_qdict(bs_obj); + qdict_put(bs_dict, "open_flags", qint_from_int(bs->open_flags)); if (bs->drv) { QObject *obj; - QDict *bs_dict = qobject_to_qdict(bs_obj); obj = qobject_from_jsonf("{ 'file': %s, 'ro': %i, 'drv': %s, " "'encrypted': %i }", Index: qemu/qmp-commands.hx =================================================================== --- qemu.orig/qmp-commands.hx +++ qemu/qmp-commands.hx @@ -1131,6 +1131,7 @@ Each json-object contain the following: - Possible values: "unknown" - "removable": true if the device is removable, false otherwise (json-bool) - "locked": true if the device is locked, false otherwise (json-bool) +- "hostcache": true if hostcache 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) @@ -1152,6 +1153,7 @@ Example: { "device":"ide0-hd0", "locked":false, + "hostcache":false, "removable":false, "inserted":{ "ro":false,