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[ Upstream commitb40813ddcd] Mounted NBD device can be resized, one use case is rbd-nbd. Fix the issue by setting up default block size, then not touch it in nbd_size_update() any more. This kind of usage is aligned with loop which has same use case too. Cc: stable@vger.kernel.org Fixes:c8a83a6b54("nbd: Use set_blocksize() to set device blocksize") Reported-by: lining <lining2020x@163.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Cc: Josef Bacik <josef@toxicpanda.com> Cc: Jan Kara <jack@suse.cz> Tested-by: lining <lining2020x@163.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.