[ENBD] enbd: help needed

[Peter T. Breuer]

"Also sprach Peter Daum:"
> after some attempts with nbd, I stumbled over enbd, which seemed
> (at least in theory) just what I need. Unfortunately, I can
> not get it to work even in a pretty minimalistic test scenario.
> 
> Here what I did:
> 
> - compile enbd-2.4.33
> insmod ./enbd.ko
> ./enbd-server 666 /dev/raid6_12/nbd # lvm volume
> ./enbd-client localhost:666 -n 4 /dev/nda
> 
> The output looks not really like somethings going totally wrong
> (attached below is the relevant part of the syslog) but any attempt
> to read from /dev/nda fails.

Did you get any help on this? The messages say that the server end is
dead.

> Device a:       Open [a] State:      verify, rw, enabled, remote invalid, last error 0, lives 0, bp 0


Says the remote is dead.

> [a] Queued:     +0R/0W curr (check 0R/0W) +0R/0W max
> [a] Buffersize: 262144  (sectors=512, blocks=64)
> [a] Blocksize:  4096    (log=12)
> [a] Size:       838860800KB
> [a] Blocks:     209715200
> [a] Sockets:    4       (+)     (+)     (+)     (*)
> [a] Requested:  0       (0)     (0)     (0)     (0)     0R/0W   max 0
> [a] Despatched: 0       (0)     (0)     (0)     (0)     0R/0W   md5 0W (0 eq, 0 ne, 0 dn)
> [a] Errored:    306     (0)     (0)     (0)     (0)     0+306
> [a] Pending:    0       (0)     (0)     (0)     (0)     0R/0W+0R/0W
> [a] B/s now:    0       (0R+0W)
> [a] B/s ave:    0       (0R+0W)
> [a] B/s max:    0       (0R+0W)
> [a] Spectrum:
> [a] Kthreads:   0       (0 waiting/0 running/1 max)
> [a] Cthreads:   4       (+)     (+)     (+)     (+)
> [a] Cpids:      4       (5906)  (5907)  (5908)  (5909)
> Device b-p:     Closed

Working client. Well ..

> # sylog:

Kernlog is what you want. dmesg. But the server is the one that's ill.


> 2007-10-16 20:00:10 ENBD #4739[2]: enbd_media_changed MEDIA CHANGED called
> 2007-10-16 20:00:10 ENBD #4745[2]: enbd_media_changed REMOTE CHECK done locally, no remote ioctl!

Uh, you forgot to load enbd_ioctl?


> 2007-10-16 20:00:10 ENBD #4843[4]: enbd_revalidate REVALIDATE called on nda
> 2007-10-16 20:00:10 ENBD #4849[4]: enbd_revalidate asked to revalidate remotely dead drive nda

There. Server says its resource is bad.

Peter