[ENBD] 2.4.32 (2004-03-07)

[Anders Blomdell]

Still getting system to hang when cross-writing between systems, this is a 
minimum setup that fails:

server1:                              server2:

modprobe enbd                         modprobe enbd
enbd-server 30010 /dev/hdb7 \         enbd-server 30000 /dev/hda7 \
             -i 2_disk_b -b 1024	                   -i 1_disk_a -b 1024
enbd-client server2:30000 \           enbd-client server1:30010 \
             -n 4 -i 1_disk_a -m \                 -n 4 -i 2_disk_b -m \
             -t 0 -b 1024 -p 60 \                  -t 0 -b 1024 -p 60 \
             /dev/nda	                             /dev/nda
mkfs.ext3 /dev/nda                    mkfs.ext3 /dev/nda

And after a few seconds both machines stops responding to logins, xterms, 
etc.
After approx 30 s more, both machines report:

ENBD enbd.c #1651[X] enbd_rollback rollback req f*******, type 1, \
      sector ********, 1 blks, 2 sectors from slot Y

with X = [0, 1, 2, 3, 4, 5, 6, 7] and
      Y = [0, 1, 2, 3, 0, 1, 2, 3]


So it seems like accesses to /dev/hd* and /dev/nd* goes through a common 
lock.

Regards

Anders