nbd-client timeout ignored

[albertdb]

OS: Ubuntu Xenial 16.04 Kernel: 4.9.20 nbd-client: 3.13

Hi,

I'm experiencing an issue with nbd-client. Whatever the timeout value I set (and also when unset), about 30 seconds after a network disconnection, socket is shut down, making FS also shutdown. Shorter disconnections are correcly managed (or maybe they are not even treated as a disconnection).

Is there any way of solving/avoiding this issue?

Thanks!

nbd-client X.X.X.X 8992 /dev/nbd1 -timeout 600 -persist -block-size 4096 -name test_timeout

[4567768.848517] XFS (nbd1): Mounting V5 Filesystem
[4567769.975868] XFS (nbd1): Ending clean mount
[4567848.602530] r8169 0000:02:00.0 enp2s0: link down
[4567878.780575] block nbd1: Connection timed out, shutting down connection
[4567878.780576] block nbd1: Receive control failed (result -32)
[4567878.780580] blk_update_request: 144 callbacks suppressed
[4567878.780580] blk_update_request: I/O error, dev nbd1, sector 10485815
[4567878.780587] XFS (nbd1): metadata I/O error: block 0xa00037 ("xlog_iodone") error -1 numblks 64
[4567878.780589] XFS (nbd1): xfs_do_force_shutdown(0x2) called from line 1200 of file fs/xfs/xfs_log.c.  Return address = 0xffffffffa07de73c
[4567878.780613] XFS (nbd1): Log I/O Error Detected.  Shutting down filesystem
[4567878.780614] XFS (nbd1): Please umount the filesystem and rectify the problem(s)
[4567878.780616] block nbd1: shutting down socket

[yoe]

@josefbacik can you take a look at this?