From 186d4f2b1deaae5c404798959bfbdb781e762045 Mon Sep 17 00:00:00 2001
From: Peter Lieven <pl@kamp.de>
Date: Thu, 24 Oct 2013 12:06:55 +0200
Subject: [PATCH] block/iscsi: add .bdrv_get_info

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 block/iscsi.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/block/iscsi.c b/block/iscsi.c
index a2d578c0a7..3095887a27 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1506,6 +1506,14 @@ out:
     return ret;
 }
 
+static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
+{
+    IscsiLun *iscsilun = bs->opaque;
+    bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz;
+    bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws;
+    return 0;
+}
+
 static QEMUOptionParameter iscsi_create_options[] = {
     {
         .name = BLOCK_OPT_SIZE,
@@ -1527,6 +1535,7 @@ static BlockDriver bdrv_iscsi = {
     .create_options  = iscsi_create_options,
 
     .bdrv_getlength  = iscsi_getlength,
+    .bdrv_get_info   = iscsi_get_info,
     .bdrv_truncate   = iscsi_truncate,
 
 #if defined(LIBISCSI_FEATURE_IOVECTOR)
-- 
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