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Thu, 10 Feb 2022 08:31:48 -0500 Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 03BEE46DD6; Thu, 10 Feb 2022 14:31:31 +0100 (CET) From: Fabian Ebner To: qemu-devel@nongnu.org Subject: [PATCH 3/4] qemu-img: dd: add -n option (skip target volume creation) Date: Thu, 10 Feb 2022 14:31:22 +0100 Message-Id: <20220210133123.347350-4-f.ebner@proxmox.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220210133123.347350-1-f.ebner@proxmox.com> References: <20220210133123.347350-1-f.ebner@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=94.136.29.106; envelope-from=f.ebner@proxmox.com; helo=proxmox-new.maurer-it.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, w.bumiller@proxmox.com, qemu-block@nongnu.org, aderumier@odiso.com, hreitz@redhat.com, t.lamprecht@proxmox.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1644514073170100001 Content-Type: text/plain; charset="utf-8" From: Alexandre Derumier Same rationale as in b2e10493c7 ("add qemu-img convert -n option (skip target volume creation)") Originally-by: Alexandre Derumier Signed-off-by: Thomas Lamprecht [FE: avoid wrong colon in getopt's optstring add documentation + commit message] Signed-off-by: Fabian Ebner --- docs/tools/qemu-img.rst | 6 +++++- qemu-img-cmds.hx | 4 ++-- qemu-img.c | 23 ++++++++++++++--------- 3 files changed, 21 insertions(+), 12 deletions(-) diff --git a/docs/tools/qemu-img.rst b/docs/tools/qemu-img.rst index 43328fe108..9b022d9363 100644 --- a/docs/tools/qemu-img.rst +++ b/docs/tools/qemu-img.rst @@ -210,6 +210,10 @@ Parameters to dd subcommand: =20 .. program:: qemu-img-dd =20 +.. option:: -n + + Skip the creation of the target volume + .. option:: bs=3DBLOCK_SIZE =20 Defines the block size @@ -496,7 +500,7 @@ Command description: it doesn't need to be specified separately in this case. =20 =20 -.. option:: dd [--image-opts] [-U] [-f FMT] [-O OUTPUT_FMT] [bs=3DBLOCK_SI= ZE] [count=3DBLOCKS] [skip=3DBLOCKS] [isize=3DINPUT_SIZE] [osize=3DOUTPUT_S= IZE] [if=3DINPUT] [of=3DOUTPUT] +.. option:: dd [--image-opts] [-U] [-f FMT] [-O OUTPUT_FMT] [-n] [bs=3DBLO= CK_SIZE] [count=3DBLOCKS] [skip=3DBLOCKS] [isize=3DINPUT_SIZE] [osize=3DOUT= PUT_SIZE] [if=3DINPUT] [of=3DOUTPUT] =20 dd copies from *INPUT* file (default: STDIN) to *OUTPUT* file (default: STDOUT) converting it from *FMT* format to *OUTPUT_FMT* format. diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx index 50993e6c47..97e750623f 100644 --- a/qemu-img-cmds.hx +++ b/qemu-img-cmds.hx @@ -58,9 +58,9 @@ SRST ERST =20 DEF("dd", img_dd, - "dd [--image-opts] [-U] [-f fmt] [-O output_fmt] [bs=3Dblock_size] [co= unt=3Dblocks] [skip=3Dblocks] [isize=3Dinput_size] [osize=3Doutput_size] [i= f=3Dinput] [of=3Doutput]") + "dd [--image-opts] [-U] [-f fmt] [-O output_fmt] [-n] [bs=3Dblock_size= ] [count=3Dblocks] [skip=3Dblocks] [isize=3Dinput_size] [osize=3Doutput_siz= e] [if=3Dinput] [of=3Doutput]") SRST -.. option:: dd [--image-opts] [-U] [-f FMT] [-O OUTPUT_FMT] [bs=3DBLOCK_SI= ZE] [count=3DBLOCKS] [skip=3DBLOCKS] [isize=3DINPUT_SIZE] [osize=3DOUTPUT_S= IZE] [if=3DINPUT] [of=3DOUTPUT] +.. option:: dd [--image-opts] [-U] [-f FMT] [-O OUTPUT_FMT] [-n] [bs=3DBLO= CK_SIZE] [count=3DBLOCKS] [skip=3DBLOCKS] [isize=3DINPUT_SIZE] [osize=3DOUT= PUT_SIZE] [if=3DINPUT] [of=3DOUTPUT] ERST =20 DEF("info", img_info, diff --git a/qemu-img.c b/qemu-img.c index 630928773d..89bf6fd087 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -4944,7 +4944,7 @@ static int img_dd(int argc, char **argv) const char *fmt =3D NULL; int64_t size =3D 0, readsize =3D 0; int64_t block_count =3D 0, out_pos, in_pos; - bool force_share =3D false; + bool force_share =3D false, skip_create =3D false; struct DdInfo dd =3D { .flags =3D 0, .count =3D 0, @@ -4982,7 +4982,7 @@ static int img_dd(int argc, char **argv) { 0, 0, 0, 0 } }; =20 - while ((c =3D getopt_long(argc, argv, ":hf:O:U", long_options, NULL)))= { + while ((c =3D getopt_long(argc, argv, ":hf:O:Un", long_options, NULL))= ) { if (c =3D=3D EOF) { break; } @@ -5002,6 +5002,9 @@ static int img_dd(int argc, char **argv) case 'h': help(); break; + case 'n': + skip_create =3D true; + break; case 'U': force_share =3D true; break; @@ -5144,13 +5147,15 @@ static int img_dd(int argc, char **argv) size - in.bsz * in.offset, &error_abort); } =20 - ret =3D 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 =3D -1; - goto out; + if (!skip_create) { + ret =3D 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 =3D -1; + goto out; + } } =20 /* TODO, we can't honour --image-opts for the target, --=20 2.30.2