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fe985b910e
xlog_in_core_2_t is a really odd type, not only is it grossly misnamed because it actually is an on-disk structure, but it also reprents the actual on-disk structure in a rather odd way. A v1 or small v2 log header look like: +-----------------------+ | xlog_record | +-----------------------+ while larger v2 log headers look like: +-----------------------+ | xlog_record | +-----------------------+ | xlog_rec_ext_header | +-------------------+---+ | ..... | +-----------------------+ | xlog_rec_ext_header | +-----------------------+ I.e., the ext headers are a variable sized array at the end of the header. So instead of declaring a union of xlog_rec_header, xlog_rec_ext_header and padding to BBSIZE, add the proper padding to struct struct xlog_rec_header and struct xlog_rec_ext_header, and add a variable sized array of the latter to the former. This also exposes the somewhat unusual scope of the log checksums, which is made explicitly now by adding proper padding and macro designating the actual payload length. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Carlos Maiolino <cem@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 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.