samba - Aug 2022 - Problem with SO_REUSEPORT in samba v4.16 No problem in v4.14

Hi Samba folks,

I have having a problem running samba v4.16.4 on my very old Linux system
running kernel v2.6.35. I had no problems with version samba v4.14.6. I am
getting the following error messages in my logs

../../source3/lib/util_sock.c:294(open_socket_in)  open_socket_in:
setsockopt(SO_REUSEPORT) failed: Protocol not available
../../source3/smbd/server.c:1097(smbd_open_one_socket)  smbd_open_one_socket:
open_socket_in failed: Protocol not available
../../source3/smbd/server.c:1264(open_sockets_smbd)  open_sockets_smbd: No
sockets available to bind to.
INTERNAL ERROR: open_sockets_smbd() failed in pid 12523 (4.16.3)


The issue appears to be that in earlier versions of smbd, if the SO_REUSEPORT
socket option could not be set then a debug message was printed but the code
would continue on. My system runs Linux v2.6.35 which does not support
SO_REUSEPORT (introduced in Linux v3.3)

I believe the behavior was changed in the following commit 

lib: Properly return errno from open_socket_in()" (Commit :
72540222c2290dc041fb01018de7febe44a4ac0d )
https://git.samba.org/?p=samba.git;a=commitdiff;h=72540222c2290dc041fb01018de7febe44a4ac0d

After this commit if setting SO_REUSEPORT fails then the socket would not be
setup.

If I were to raise a bug asking for the old behavior back do you think it would
be fixed?

Thanks so much,

Berto.

On Thu, 2022-08-18 at 11:34 +1000, Berto Furth via samba
wrote:
> Hi Samba folks,
> 
> If I were to raise a bug asking for the old behavior back do you
> think it would be fixed?
I've sent you an invite to our bugzilla.  Feel free to report it there
- if there is some reason for it not to be fixed then it can easily be
closed.

But I think it is more likely to just be fixed for you, and a bug is
needed to do the backport, so start there.

Andrew Bartlett

-- 
Andrew Bartlett (he/him)       https://samba.org/~abartlet/
Samba Team Member (since 2001) https://samba.org
Samba Team Lead, Catalyst IT   https://catalyst.net.nz/services/samba

Samba Development and Support, Catalyst IT - Expert Open Source
Solutions