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Eric Biggers
78cd170d03
Update NFSD's support for "legacy client tracking" (which uses MD5) to use the MD5 library instead of crypto_shash. This has several benefits: - Simpler code. Notably, much of the error-handling code is no longer needed, since the library functions can't fail. - Improved performance due to reduced overhead. A microbenchmark of nfs4_make_rec_clidname() shows a speedup from 1455 cycles to 425. - The MD5 code can now safely be built as a loadable module when nfsd is built as a loadable module. (Previously, nfsd forced the MD5 code to built-in, presumably to work around the unreliability of the name-based loading.) Thus select MD5 from the tristate option NFSD if NFSD_LEGACY_CLIENT_TRACKING, instead of from the bool option NFSD_V4. - Fixes a bug where legacy client tracking was not supported on kernels booted with "fips=1", due to crypto_shash not allowing MD5 to be used. This particular use of MD5 is not for a cryptographic purpose, though, so it is acceptable even when fips=1 (see https://lore.kernel.org/r/dae495a93cbcc482f4ca23c3a0d9360a1fd8c3a8.camel@redhat.com/). Signed-off-by: Eric Biggers <ebiggers@kernel.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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
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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.