[Samba] Small bug when server IP changes

[Moray Henderson]

I think this is a bug:

CentOS 5.4 using Samba 3.4.7.  If the server IP address changes, nmbd
complains every few minutes that "There is already a domain master
browser" on the old IP address.

Although "Chapter 41. Managing TDB Files" states:

wins.dat N WINS database iused only when wins support = yes has been
set. This gets rebuilt or updated at every restart. 

that does not appear to be the case, since manually deleting wins.dat
and restarting Samba makes the problem go away.


Steps to reproduce:

Server IP address 10.32.1.201 running Samba:

# rpm -qa samba3\* libsmb\* libwb\* kernel
samba3-client-3.4.7-42.el5
samba3-cifsmount-3.4.7-42.el5
samba3-3.4.7-42.el5
samba3-doc-3.4.7-42.el5
libwbclient0-3.4.7-42.el5
samba3-winbind-3.4.7-42.el5
kernel-2.6.18-164.15.1.el5

# service smb status
smbd (pid 2591 2548) is running...
nmbd (pid 2552 2551) is running...

# ip addr list up
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
qlen 1000
    link/ether 00:0c:29:dd:52:71 brd ff:ff:ff:ff:ff:ff
    inet 10.32.1.201/24 brd 10.32.1.255 scope global eth0
    inet6 fe80::20c:29ff:fedd:5271/64 scope link
       valid_lft forever preferred_lft forever

# testparm -s | grep interfaces
        interfaces = 10.32.1.201/255.255.255.0

Now change the server's IP address by editing ifcfg-eth0 and smb.conf to
change 10.32.1.201 to 10.32.1.200.  Reboot the server.

# service smb status
smbd (pid 2591 2548) is running...
nmbd (pid 2552 2551) is running...

# ip addr list up
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
qlen 1000
    link/ether 00:0c:29:dd:52:71 brd ff:ff:ff:ff:ff:ff
    inet 10.32.1.200/24 brd 10.32.1.255 scope global eth0
    inet6 fe80::20c:29ff:fedd:5271/64 scope link
       valid_lft forever preferred_lft forever

# testparm -s | grep interfaces
        interfaces = 10.32.1.200/255.255.255.0

# ping 10.32.1.201
PING 10.32.1.201 (10.32.1.201) 56(84) bytes of data.