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nbd patches for 2020-02-06

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- Allow setting NBD description from QMP for parity with qemu-nbd
 - Remove deprecated 'qemu-nbd --partition'
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Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2020-02-06' into staging

nbd patches for 2020-02-06

- Allow setting NBD description from QMP for parity with qemu-nbd
- Remove deprecated 'qemu-nbd --partition'

# gpg: Signature made Thu 06 Feb 2020 12:50:46 GMT
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# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2020-02-06:
  qemu-nbd: Removed deprecated --partition option
  docs: Fix typo in qemu-nbd -P replacement
  nbd: Allow description when creating NBD blockdev

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2020-02-06 18:59:12 +00:00
commit 5b7686f3fa
8 changed files with 45 additions and 182 deletions
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15
docs/interop/qemu-nbd.rst
View file

@ -72,13 +72,6 @@ driver options if ``--image-opts`` is specified.
Export the disk as read-only.
.. option:: -P, --partition=NUM
Deprecated: Only expose MBR partition *NUM*. Understands physical
partitions 1-4 and logical partition 5. New code should instead use
:option:`--image-opts` with the raw driver wrapping a subset of the
original image.
.. option:: -B, --bitmap=NAME
If *filename* has a qcow2 persistent bitmap *NAME*, expose
@ -224,14 +217,14 @@ a 1 megabyte subset of a raw file, using the export name 'subset':
-t -x subset -p 10810 \
--image-opts driver=raw,offset=1M,size=1M,file.driver=file,file.filename=file.raw
Serve a read-only copy of just the first MBR partition of a guest
image over a Unix socket with as many as 5 simultaneous readers, with
a persistent process forked as a daemon:
Serve a read-only copy of a guest image over a Unix socket with as
many as 5 simultaneous readers, with a persistent process forked as a
daemon:
::
qemu-nbd --fork --persistent --shared=5 --socket=/path/to/sock \
--partition=1 --read-only --format=qcow2 file.qcow2
--read-only --format=qcow2 file.qcow2
Expose the guest-visible contents of a qcow2 file via a block device
/dev/nbd0 (and possibly creating /dev/nbd0p1 and friends for