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9abe03a0e4
Add the ondisk structure definitions for realtime refcount btrees. The realtime refcount btree will be rooted from a hidden inode so it needs to have a separate btree block magic and pointer format. Next, add everything needed to read, write and manipulate refcount btree blocks. This prepares the way for connecting the btree operations implementation, though the changes to actually root the rtrefcount btree in an inode come later. Signed-off-by: "Darrick J. Wong" <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
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 reStructuredText 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.