[PATCH v2 0/2] nbd: requeue request if only one connection is configured

[Hou Pu <houpu.main@gmail.com>]

Hello,

NBD server could be upgraded if we have multiple connections.
But if we have only one connection, after we take down NBD server,
all inflight IO could finally timeout and return error. These
patches fix this using current reconfiguration framework.

I noticed that Mike has following patchset

nbd: local daemon restart support
https://lore.kernel.org/linux-block/5DD41C49.3080209@redhat.com/

It add another netlink interface (NBD_ATTR_SWAP_SOCKETS) and requeue
request immediately after recongirure/swap socket. It do not need to
wait for timeout to fire and requeue in timeout handler, which seems more
like an improvement. Let fix this in current framework first.

Changes compared to v2:
Fix comments in nbd_read_stat() to be aligned with the code change
suggested by Mike Christie.

Hou Pu (2):
  nbd: enable replace socket if only one connection is configured
  nbd: requeue command if the soecket is changed

 drivers/block/nbd.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

-- 
2.11.0