oracular (1) nbdkit-release-notes-1.28.1.gz

Provided by: nbdkit_1.40.4-1ubuntu1_amd64 bug

NAME
       nbdkit-release-notes-1.28 - release notes for nbdkit 1.28


DESCRIPTION
       These are the release notes for nbdkit stable release 1.28.  This describes the major changes since 1.26.

       nbdkit 1.28.0 was released on 23 September 2021.

   Security
       CVE-2021-3716 reset structured replies on starttls

       nbdkit was vulnerable to injected plaintext when upgrading to a secure connection.  For the full
       announcement see https://www.redhat.com/archives/libguestfs/2021-August/msg00083.html (Eric Blake).

       All past security issues and information about how to report new ones can be found in nbdkit-security(1).

   Plugins
       nbdkit-data-plugin(1) has new "le<NN>:" and "be<NN>:" prefixes for little and big endian words.  Also the
       plugin tries much harder to optimize expressions.  The test suite has been greatly expanded to catch
       potential regressions.

       nbdkit-floppy-plugin(1) now allows you to reserve free space (Nolan Leake).

       nbdkit-ssh-plugin(1) no longer references SHA1 host keys as part of the effort to remove insecure
       algorithms (Daniel Berrangé).

       nbdkit-vddk-plugin(1) reports "can_flush" and "can_fua" based on what the version of VDDK supports.  New
       debug flag -D vddk.stats=1 prints the amount of time spent in VDDK calls on exit which can be useful for
       profiling performance.

   Filters
       nbdkit-cow-filter(1) and nbdkit-cache-filter(1) no longer break up large read requests into page-sized
       requests.  In addition the default block size for both filters is now 64K.  Both changes greatly improve
       performance.

       nbdkit-cache-filter(1) has a new "cache-on-read=/PATH" parameter allowing callers to enable and disable
       the cache-on-read feature at runtime.  Also there is a new "cache-min-block-size" parameter letting you
       select the block size at runtime (thanks Martin Kletzander).

       nbdkit-cow-filter(1) has a new "cow-on-read" parameter which works similarly to the corresponding cache
       filter feature.  The new "cow-block-size" parameter lets you select the block size at runtime.

       nbdkit-cow-filter(1) has less verbose debugging.  To restore the old debug output use -D cow.verbose=1

       nbdkit-delay-filter(1) has new "delay-open" and "delay-close" parameters to inject delays when clients
       connect and disconnect.  Delay filter parameters are now parsed more accurately (thanks Ming Xie).

   Language bindings
       The OCaml bindings now call "caml_shutdown" when unloading the plugin.  This causes "Stdlib.at_exit"
       handlers to run correctly, closes file descriptors, releases dependent shared libraries and frees memory.
       Valgrind on OCaml plugins should not show any false positives about leaked memory.

       OCaml and Python bindings may now use the ".cleanup" method.

       References to Python 2 in nbdkit-python-plugin(3) have been removed.

   Server
       Fix captive nbdkit $uri variable so when TLS is used the URI is constructed with the "nbds:" prefix.
       Additionally add a new variable $tls which can be used by the subprocess to tell if TLS is enabled.

       Debug messages are now printed atomically.  This means that debug messages are no longer broken up across
       multiple lines if there are other processes writing to stderr at the same time (which often happened when
       using captive nbdkit).

       Enhanced valgrind support (./configure --enable-valgrind) can now be enabled safely and with no
       performance impact even in production builds (Eric Blake).

   API
       Plugins or filters using "nbdkit_nanosleep" now don't hang if the client closes the socket abruptly
       (thanks Ming Xie).

   Bug fixes
       nbdkit-data-plugin(1) and nbdkit-memory-plugin(1) using allocator=malloc no longer crash because of
       memory corruption in some corner cases (only seen on s390x, but could happen on other architectures).
       Meanwhile "allocator=zstd" no longer crashes when zeroing unallocated space.

   Tests
       Tests now use the new "GLIBC_TUNABLES" feature, replacing "MALLOC_CHECK_" on glibc ≥ 2.34 (thanks Eric
       Blake, Siddhesh Poyarekar).

   Build
       configure.ac now uses spaces consistently, and has been modernized to support the latest autotools (Eric
       Blake).

       podwrapper.pl has been unified (almost) with the copy in libnbd.

       Continue fuzzing using AFL++.  Updated the fuzzing documentation.


SEE ALSO
       nbdkit(1).


AUTHORS
       Authors of nbdkit 1.28:

       Daniel P. Berrangé
       Eric Blake
       Martin Kletzander
       Nolan Leake
       Richard W.M. Jones


       Copyright Red Hat


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