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From e865b795a4b0eaae50745ad7dd694447c72600c9 Mon Sep 17 00:00:00 2001
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Message-Id: <e865b795a4b0eaae50745ad7dd694447c72600c9.1418766606.git.jen@redhat.com>
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In-Reply-To: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
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References: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
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From: Fam Zheng <famz@redhat.com>
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Date: Thu, 4 Dec 2014 00:05:13 -0600
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Subject: [CHANGE 19/31] vmdk: Implement .bdrv_write_compressed
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To: rhvirt-patches@redhat.com,
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    jen@redhat.com
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <1417651524-18041-20-git-send-email-famz@redhat.com>
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Patchwork-id: 62692
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O-Subject: [RHEL-7.1 qemu-kvm PATCH v5 19/30] vmdk: Implement .bdrv_write_compressed
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Bugzilla: 1134283
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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Add a wrapper function to support "compressed" path in qemu-img convert.
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Only support streamOptimized subformat case for now (num_extents == 1
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and extent compression is true).
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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(cherry picked from commit ba0ad89e2c3316ce26ca6576a3c5051f91bfc0fe)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Jeff E. Nelson <jen@redhat.com>
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---
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 block/vmdk.c | 14 ++++++++++++++
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 1 file changed, 14 insertions(+)
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diff --git a/block/vmdk.c b/block/vmdk.c
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index 4cd2795..157db7e 100644
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--- a/block/vmdk.c
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+++ b/block/vmdk.c
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@@ -1495,6 +1495,19 @@ static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
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     return ret;
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 }
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+static int vmdk_write_compressed(BlockDriverState *bs,
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+                                 int64_t sector_num,
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+                                 const uint8_t *buf,
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+                                 int nb_sectors)
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+{
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+    BDRVVmdkState *s = bs->opaque;
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+    if (s->num_extents == 1 && s->extents[0].compressed) {
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+        return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
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+    } else {
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+        return -ENOTSUP;
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+    }
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+}
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+
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 static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
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                                              int64_t sector_num,
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                                              int nb_sectors,
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@@ -2104,6 +2117,7 @@ static BlockDriver bdrv_vmdk = {
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     .bdrv_reopen_prepare          = vmdk_reopen_prepare,
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     .bdrv_read                    = vmdk_co_read,
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     .bdrv_write                   = vmdk_co_write,
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+    .bdrv_write_compressed        = vmdk_write_compressed,
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     .bdrv_co_write_zeroes         = vmdk_co_write_zeroes,
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     .bdrv_close                   = vmdk_close,
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     .bdrv_create                  = vmdk_create,
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-- 
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2.1.0
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