From patchwork Mon May 16 18:10:37 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [RFC,1/3] Qemu: Enhance "info block" to display cache setting Date: Mon, 16 May 2011 08:10:37 -0000 From: Supriya Kannery X-Patchwork-Id: 95794 Message-Id: <20110516181037.7142.76146.sendpatchset@skannery> To: qemu-devel@nongnu.org Cc: Kevin Wolf , Supriya Kannery , Christoph Hellwig , Prerna Saxena Enhance "info block" to display cache setting Example: (qemu) info block ide0-hd0: type=hd removable=0 file=../rhel6-32.qcow2 ro=0 drv=qcow2 encrypted=0 Enhanced to include "cache" setting: (qemu) info block ide0-hd0: type=hd removable=0 cache=none file=../rhel6-32.qcow2 ro=0 drv=qcow2 encrypted=0 Signed-off-by: Supriya Kannery Signed-off-by: Prerna Saxena --- block.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) Index: qemu/block.c =================================================================== --- qemu.orig/block.c +++ qemu/block.c @@ -1713,6 +1713,19 @@ 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, " cache=none"); + } else if (open_flags & BDRV_O_CACHE_WB) { + if (open_flags & BDRV_O_NO_FLUSH) + monitor_printf(mon, " cache=unsafe"); + else + monitor_printf(mon, " cache=writeback"); + } else + monitor_printf(mon, " cache=writethrough"); + } + if (qdict_haskey(bs_dict, "inserted")) { QDict *qdict = qobject_to_qdict(qdict_get(bs_dict, "inserted")); @@ -1762,9 +1775,10 @@ void bdrv_info(Monitor *mon, QObject **r } bs_obj = qobject_from_jsonf("{ 'device': %s, 'type': %s, " - "'removable': %i, 'locked': %i }", + "'removable': %i, 'locked': %i, " + "'open_flags': %d }", bs->device_name, type, bs->removable, - bs->locked); + bs->locked, bs->open_flags); if (bs->drv) { QObject *obj;