1nbdkit-release-notes-1.28(1) NBDKIT nbdkit-release-notes-1.28(1)
2
6 nbdkit-release-notes-1.28 - release notes for nbdkit 1.28
7
9 These are the release notes for nbdkit stable release 1.28. This
10 describes the major changes since 1.26.
11 nbdkit 1.28.0 was released on 23 September 2021.
13 Security
15 CVE-2021-3716 reset structured replies on starttls
16 nbdkit was vulnerable to injected plaintext when upgrading to a secure
18 connection. For the full announcement see
19 https://www.redhat.com/archives/libguestfs/2021-August/msg00083.html
20 (Eric Blake).
21 All past security issues and information about how to report new ones
23 can be found in nbdkit-security(1).
24 Plugins
26 nbdkit-data-plugin(1) has new "le<NN>:" and "be<NN>:" prefixes for
27 little and big endian words. Also the plugin tries much harder to
28 optimize expressions. The test suite has been greatly expanded to
29 catch potential regressions.
30 nbdkit-floppy-plugin(1) now allows you to reserve free space (Nolan
32 Leake).
33 nbdkit-ssh-plugin(1) no longer references SHA1 host keys as part of the
35 effort to remove insecure algorithms (Daniel Berrangé).
36 nbdkit-vddk-plugin(1) reports "can_flush" and "can_fua" based on what
38 the version of VDDK supports. New debug flag -D vddk.stats=1 prints
39 the amount of time spent in VDDK calls on exit which can be useful for
40 profiling performance.
41 Filters
43 nbdkit-cow-filter(1) and nbdkit-cache-filter(1) no longer break up
44 large read requests into page-sized requests. In addition the default
45 block size for both filters is now 64K. Both changes greatly improve
46 performance.
47 nbdkit-cache-filter(1) has a new "cache-on-read=/PATH" parameter
49 allowing callers to enable and disable the cache-on-read feature at
50 runtime. Also there is a new "cache-min-block-size" parameter letting
51 you select the block size at runtime (thanks Martin Kletzander).
52 nbdkit-cow-filter(1) has a new "cow-on-read" parameter which works
54 similarly to the corresponding cache filter feature. The new
55 "cow-block-size" parameter lets you select the block size at runtime.
56 nbdkit-cow-filter(1) has less verbose debugging. To restore the old
58 debug output use -D cow.verbose=1
59 nbdkit-delay-filter(1) has new "delay-open" and "delay-close"
61 parameters to inject delays when clients connect and disconnect. Delay
62 filter parameters are now parsed more accurately (thanks Ming Xie).
63 Language bindings
65 The OCaml bindings now call "caml_shutdown" when unloading the plugin.
66 This causes "Stdlib.at_exit" handlers to run correctly, closes file
67 descriptors, releases dependent shared libraries and frees memory.
68 Valgrind on OCaml plugins should not show any false positives about
69 leaked memory.
70 OCaml and Python bindings may now use the ".cleanup" method.
72 References to Python 2 in nbdkit-python-plugin(3) have been removed.
74 Server
76 Fix captive nbdkit $uri variable so when TLS is used the URI is
77 constructed with the "nbds:" prefix. Additionally add a new variable
78 $tls which can be used by the subprocess to tell if TLS is enabled.
79 Debug messages are now printed atomically. This means that debug
81 messages are no longer broken up across multiple lines if there are
82 other processes writing to stderr at the same time (which often
83 happened when using captive nbdkit).
84 Enhanced valgrind support (./configure --enable-valgrind) can now be
86 enabled safely and with no performance impact even in production builds
87 (Eric Blake).
88 API
90 Plugins or filters using "nbdkit_nanosleep" now don't hang if the
91 client closes the socket abruptly (thanks Ming Xie).
92 Bug fixes
94 nbdkit-data-plugin(1) and nbdkit-memory-plugin(1) using
95 allocator=malloc no longer crash because of memory corruption in some
96 corner cases (only seen on s390x, but could happen on other
97 architectures). Meanwhile "allocator=zstd" no longer crashes when
98 zeroing unallocated space.
99 Tests
101 Tests now use the new "GLIBC_TUNABLES" feature, replacing
102 "MALLOC_CHECK_" on glibc ≥ 2.34 (thanks Eric Blake, Siddhesh
103 Poyarekar).
104 Build
106 configure.ac now uses spaces consistently, and has been modernized to
107 support the latest autotools (Eric Blake).
108 podwrapper.pl has been unified (almost) with the copy in libnbd.
110 Continue fuzzing using AFL++. Updated the fuzzing documentation.
112
114 nbdkit(1).
115
117 Authors of nbdkit 1.28:
118 Daniel P. Berrangé
120 Eric Blake
121 Martin Kletzander
122 Nolan Leake
123 Richard W.M. Jones
124
126 Copyright (C) 2021 Red Hat Inc.
127
129 Redistribution and use in source and binary forms, with or without
130 modification, are permitted provided that the following conditions are
131 met:
132 • Redistributions of source code must retain the above copyright
134 notice, this list of conditions and the following disclaimer.
135 • Redistributions in binary form must reproduce the above copyright
137 notice, this list of conditions and the following disclaimer in the
138 documentation and/or other materials provided with the
139 distribution.
140 • Neither the name of Red Hat nor the names of its contributors may
142 be used to endorse or promote products derived from this software
143 without specific prior written permission.
144 THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND ANY
146 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
147 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
148 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR CONTRIBUTORS BE
149 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
150 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
151 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
152 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
153 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
154 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
155 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
156nbdkit-1.30.7 2022-07-10 nbdkit-release-notes-1.28(1)