libnbd-release-notes-1.8(1)

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version 1.25.8 · 18 versions
, in centos-stream 10

🦋 libnbd-release-notes-1.8: bestie edition 🦋

✨ NAME ✨

libnbd-release-notes-1.8 — release notes for libnbd 1.8.

okay bestie, this is the libnbd-release-notes-1.8(1) manual page, and it's giving “stable release 1.8 has entered the chat” energy. Let's go. 💅

🌸 DESCRIPTION 🌸

These are the release notes for libnbd stable release 1.8. This describes the major changes since 1.6. 🎀

libnbd 1.8.0 was released on 7 June 2021. 🗓️

libnbd is now hosted on gitlab: https://listman.redhat.com/archives/libguestfs/2021-February/msg00021.html

🔐 Security 🔐

If you find a security issue, please read SECURITY in the source (online here: https://gitlab.com/nbdkit/libnbd/blob/master/SECURITY). To find out about previous security issues in libnbd, see libnbd-security(3).

There was one security bug found in libnbd during this release cycle. 😭

See the full announcement here: https://listman.redhat.com/archives/libguestfs/2021-March/msg00092.html (Found and fixed by Eric Blake). ✅

🧸 New APIs 🧸

🪄 Enhancements to existing APIs 🪄

  • Numeric IPv6 URIs (like "nbd://[::1]/") are now supported. 🌈
  • libnbd gives a better error message if the server backlog overflows (thanks Xin Long, Lukas Doktor, Eric Blake, Martin Kletzander).

🚀 New features 🚀

  • Continuous integration (CI) tests now run on every commit and merge request to the upstream repository (Martin Kletzander). 🎉

🛠️ Tools 🛠️

  • A great deal of work has been done to improve the performance of nbdcopy(1) (Nir Soffer, Eric Blake).
  • On Linux, nbdcopy now uses readahead when reading from files, and takes steps to preserve the host page cache.
  • nbdcopy new --request-size option to allow controlling the size of requests made to NBD servers. Adjusting this can affect performance (Nir Soffer).
  • nbdcopy now supports "null:" pseudo-target, where it discards the output. This is useful for benchmarking.
  • nbdcopy new -v flag to enable libnbd and other debugging.
  • nbdinfo(1) --list (which lists all exports of a server) no longer exits early if one of the exports is inaccessible or there is a recoverable error (Eric Blake).
  • nbdinfo now prints the URI of each export in the output making it easier to connect back to each export.
  • nbdfuse(1) is now multithreaded and supports issuing parallel NBD commands on a single connection as well as multi-conn, and other enhancements have been made. This resulted in around 50% performance improvement when tested with fio.
  • nbdfuse now supports nbdcopy-style "[ CMD ]", eg:
nbdfuse dir/ramdisk [ nbdkit memory 1G ]
  • nbdfuse now supports trimming. Also it supports fast zeroing, but this requires a forthcoming kernel patch before it will work.
  • nbdfuse sets the virtual file permissions appropriately if the NBD export is read-only.
  • nbdfuse new -v flag to enable libnbd and other debugging.

🧪 Tests 🧪

  • Added a test of interoperability with qemu-storage-daemon(1). Note that qemu-storage-daemon was broken in qemu 6.0.0 so this test can fail unless you update to a fixed version (thanks Stefan Hajnoczi, Daniel Berrangé).
  • Added a test of nbdcopy with TLS which was previously untested.
  • Python code style tests are now opt-in using:
./configure --enable-python-code-style
  • More tests should now run on FreeBSD and not be skipped. 🧊
  • nbdfuse tests now ensure that errors from NBD are transmitted through FUSE back to the local client.
  • "MALLOC_CHECK_" and "MALLOC_PERTURB_" are only enabled when running the tests, not when running libnbd programs from the build directory. This makes it easier to do benchmarks.

🩹 Other improvements and bug fixes 🩹

  • The minimum C compiler is now ISO C99 (previously ANSI C90).
  • FUSE 3 (instead of FUSE 2) is now required to build nbdfuse.
  • The library tries harder not to leak thread-local storage memory on dlclose or exit. (Because of the design of Linux it is not always possible to avoid this, especially in multithreaded programs.)
  • Fix the progress bar in nbdcopy(1).
  • UTF-8 export names are now processed and displayed properly by nbdinfo(1).
  • The --help output of nbdcopy, nbdfuse and nbdinfo now displays a brief summary of all options and has some examples.
  • The generator now only requires ocamlc, not ocamlfind (Abhay Raj Singh).
  • Golang bindings now use and require golang modules.

📚 Documentation 📚

  • Document using libnbd with the Meson build system.
  • Added Python examples.
  • Add example of how to integrate libnbd with libev (Nir Soffer).

👀 SEE ALSO 👀

libnbd(3).

👑 AUTHORS 👑

  • Eric Blake
  • Richard W.M. Jones
  • Martin Kletzander
  • Nir Soffer

Copyright Red Hat

📜 LICENSE 📜

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

That's the whole libnbd-release-notes-1.8(1) moment, bestie — source/version libnbd-1.25.8, dated 2026-10-13. mwah 💋

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