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[5/5] doc: admin-guide: add QCOW2 file format to loop device documentation

Message ID 20190823225619.15530-6-development@manuel-bentele.de (mailing list archive)
State New, archived
Headers show
Series block: loop: add file format subsystem and QCOW2 file format driver | expand

Commit Message

Manuel Bentele Aug. 23, 2019, 10:56 p.m. UTC 
From: Manuel Bentele <development@manuel-bentele.de>

The existing documentation about the loop block device is extended by
a section about the QCOW2 file format driver. The documentation is written
in the reST kernel documentation format.

Signed-off-by: Manuel Bentele <development@manuel-bentele.de>
---
 Documentation/admin-guide/blockdev/loop.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/Documentation/admin-guide/blockdev/loop.rst b/Documentation/admin-guide/blockdev/loop.rst
index 69d8172c85db..3a5897a14c8b 100644
--- a/Documentation/admin-guide/blockdev/loop.rst
+++ b/Documentation/admin-guide/blockdev/loop.rst
@@ -72,3 +72,14 @@  image file. It supports discarding, asynchrounous IO, flushing and cryptoloop
 support.
 
 The driver's kernel module is named *loop_file_fmt_raw*.
+
+
+QCOW
+~~~~
+
+The QCOW file format driver implements QEMU's copy on write file format in
+version 2. At the moment, the file format driver only supports the reading
+of QCOW2 disk image files. It does not support writing to QCOW2 images, the
+recovery of broken QCOW images, snapshots and reference counts.
+
+The driver's kernel module is named *loop_file_fmt_qcow*.