Re: simple cdrom eject command

"Also sprach Alexander Esmont:"
> PTB> You might want to decompose my suggested stanza into two parts,
> PTB> "before" and "after" to better fit in with the existing code.
>  
> At this time I have simple test - 
> # eject /dev/nda
> ....
> # eject -t /dev/nda
> 
> for open and close tray. After this command I have Segmentation fault in
> kernel, and module does not removed from kernel (Device busy).

I have just tried it here on kernel 2.6.12.3. Works fine.

I started the remote server with:

   # /usr/sbin/enbd-server 5005 -m -r -s 700M /dev/cdrom

and the local client with:

   # /tmp/enbd-client remote-server:5005 -n 1 /dev/ndb

I started with a cdrom in the caddy before starting up the server (I
don't know what difference it makes - I gave the size on the command
line so it doesn't have to look at the device in case there is no media
there).

Then at the client end I ran:

    # strace eject /dev/ndb

and the trace showed the ioctl going through OK:

    ioctl(3, CDROMCLOSETRAY, 0xbf8dc08c)    = 0

Moreover, I was stracing the server at the other end too, and I saw the
ioctl being delivered:

   fcntl(10, F_GETFL)                      = 0x8000 (flags O_RDONLY|0x8000)
   close(10)                               = 0
   open("/dev/cdrom", O_RDONLY|O_NONBLOCK|0x8000) = 10
   ioctl(10, CDROMEJECT, 0xbf882f4c)       = 0
   fcntl(10, F_SETFL, O_RDONLY|0x8000)     = 0

and the tray closed (and opened, with eject -t).

So I don't see any problem.

Peter


> Please test this command at your machine and tell me - 
> its work correct or no?
> 
> That's my commands:
> # make clean
> ...
> # make
> ...
> # insmod /root/nbd-2.4.32/build/enbd.o
> # insmod /root/nbd-2.4.32/build/enbd_ioctl.o
> # /root/nbd-2.4.32/build/enbd-server 4004 -m -r /dev/hdc
> ...
> # /root/nbd-2.4.32/build/enbd-client localhost:4004 /dev/nda
> ...
> # eject /dev/nda
> # eject -t /dev/nda
>