qemu-img : add -n option to dd to skip destination image create

debian/patches/pve/0030-qemu-img-dd-add-n-skip_create.patch

@@ -0,0 +1,67 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Alexandre Derumier <aderumier@odiso.com>
+Date: Wed, 21 Mar 2018 08:51:34 +0100
+Subject: [PATCH] qemu-img dd : add -n skip_create
+
+---
+ qemu-img.c | 23 ++++++++++++++---------
+ 1 file changed, 14 insertions(+), 9 deletions(-)
+
+diff --git a/qemu-img.c b/qemu-img.c
+index 2605367c59..73aa18e086 100644
+--- a/qemu-img.c
++++ b/qemu-img.c
+@@ -4218,7 +4218,7 @@ static int img_dd(int argc, char **argv)
+     const char *fmt = NULL;
+     int64_t size = 0, readsize = 0;
+     int64_t block_count = 0, out_pos, in_pos;
+-    bool force_share = false;
++    bool force_share = false, skip_create = false;
+     struct DdInfo dd = {
+         .flags = 0,
+         .count = 0,
+@@ -4256,7 +4256,7 @@ static int img_dd(int argc, char **argv)
+         { 0, 0, 0, 0 }
+     };
+ 
+-    while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) {
++    while ((c = getopt_long(argc, argv, ":hf:O:U:n", long_options, NULL))) {
+         if (c == EOF) {
+             break;
+         }
+@@ -4276,6 +4276,9 @@ static int img_dd(int argc, char **argv)
+         case 'h':
+             help();
+             break;
++        case 'n':
++            skip_create = true;
++            break;
+         case 'U':
+             force_share = true;
+             break;
+@@ -4416,13 +4419,15 @@ static int img_dd(int argc, char **argv)
+                                 size - in.bsz * in.offset, &error_abort);
+         }
+ 
+-        ret = bdrv_create(drv, out.filename, opts, &local_err);
+-        if (ret < 0) {
+-            error_reportf_err(local_err,
+-                              "%s: error while creating output image: ",
+-                              out.filename);
+-            ret = -1;
+-            goto out;
++        if (!skip_create) {
++            ret = bdrv_create(drv, out.filename, opts, &local_err);
++            if (ret < 0) {
++                error_reportf_err(local_err,
++                                  "%s: error while creating output image: ",
++                                  out.filename);
++                ret = -1;
++                goto out;
++            }
+         }
+ 
+         /* TODO, we can't honour --image-opts for the target,
+-- 
+2.11.0
+

debian/patches/series

@@ -27,5 +27,6 @@ pve/0026-backup-introduce-vma-archive-format.patch
 pve/0027-adding-old-vma-files.patch
 pve/0028-vma-add-throttling-options-to-drive-mapping-fifo-pro.patch
 pve/0029-qemu-img-dd-add-isize-parameter.patch
+pve/0030-qemu-img-dd-add-n-skip_create.patch
 extra/0001-Revert-target-i386-disable-LINT0-after-reset.patch
 extra/0002-ratelimit-don-t-align-wait-time-with-slices.patch