[PATCH 0/2] Add support for setting netlink backend string

[Eric Blake <eblake@redhat.com>]

Stefan Hajnoczi pointed out to me that since kernel 5.14 (commit
6497ef8d in Apr 2021), the netlink interface has allowed userspace to
pass in an arbitrary backend string visible at
/sys/block/nbdN/backend, and which prevents the abuse of netlink to
arbitrarily reconfigure an active NBD connection to a different
backend, for some added safety when multiple threads might be racing
to create NBD devices.  Time to expose it in nbd-client, along with
first fixing some regressions along the way.

Eric Blake (2):
  nbd-client: Fix use without -N
  nbd-client: Add support for setting /sys/block/nbdN/backend

 .gitignore               |  1 +
 man/nbd-client.8.sgml.in | 24 +++++++++++++++++++++++-
 nbd-client.c             | 30 ++++++++++++++++++++++++------
 nbd-netlink.h            |  7 +++++--
 4 files changed, 53 insertions(+), 9 deletions(-)

-- 
2.47.0