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[Qemu-devel] [v7 Patch 1/5]Qemu: Enhance "info block" to display host ca
From: |
Supriya Kannery |
Subject: |
[Qemu-devel] [v7 Patch 1/5]Qemu: Enhance "info block" to display host cache setting |
Date: |
Tue, 11 Oct 2011 08:40:59 +0530 |
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 <address@hidden>
---
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");
+ }
+
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));
if (bdrv_dev_has_removable_media(bs)) {
qdict_put(bs_dict, "tray-open",