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Mon, 21 Oct 2019 01:14:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1571620445; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=hvPOC83TFmIPkNxqxmDoKWdTzvISl7j/eoqdVERqfbQ=; b=eSb8ENtdGKC7CUd1OuUYHP6RbubUOIhX0OvLGChr+9E7d0gnUqrIRP1BsBaBla/oJ4Q0Ni MvGQKGuQVZYWYsScxmgJUP8waHchLDmMhxhq3ZBz+dO3bWmOyqWQJvxfqaLBsInNciPa8y bKKicfX04VHkRwLTa05nGSMkU4wONy0= From: Han Han To: qemu-devel@nongnu.org Subject: [PATCH v2] qemu-img.texi: Describe data_file and data_file_raw Date: Mon, 21 Oct 2019 09:14:21 +0800 Message-Id: <20191021011421.24748-1-hhan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-MC-Unique: rx2J_UxCNf2S75e_3_lKoA-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Han Han , qemu-block@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" https://bugzilla.redhat.com/show_bug.cgi?id=3D1763105 Signed-off-by: Han Han Reviewed-by: John Snow Reviewed-by: Stefan Hajnoczi --- qemu-img.texi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/qemu-img.texi b/qemu-img.texi index b5156d6316..983c6122f8 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -763,6 +763,16 @@ file which is COW and has data blocks already, it coul= dn't be changed to NOCOW by setting @code{nocow=3Don}. One can issue @code{lsattr filename} to chec= k if the NOCOW flag is set or not (Capital 'C' is NOCOW flag). =20 +@item data_file +File name of data file that is stored in the image and used as a default f= or +opening the image. If the option is used, qcow2 file only stores the metad= ata +for the image. + +@item data_file_raw +This option requires @option{data_file}. If this option is set to @code{on= }, +qemu will always keep the external data file consistent as a standalone +read-only raw image. Default value is @code{off}. + @end table =20 @item Other --=20 2.20.1