hello again
sorry for bothering you again, but i still don't see how to map from dev_t to the
scsi device name ( or info ).
do you mean i have to scan the directory made by scsidev for the right major/minor
combo ?
than why do i need scsidev, i can scan /dev/sd* as well? or even scan /etc/fstab.
in 4.4BSD there is a syscall which translate from dev_t into device name
char* devname( dev_t );
do you know if such a call exists in linux?
for now i implemented my own version of devname scaning /etc/fstab with
getmntent(3), but i feel extrimly bad about
doing all this redundent work( the kernel must have done the same when opened my
file )
THX
/gabi
Karl Hammar wrote:
> Sorry, misunderstood you.
> Ok, run scsidev once (hmm, it coredumped for me) you then get a
> /dev/scsi directory:
>
> # ls -l /dev/scsi/
> total 0
> crw------- 1 root root 9, 128 Aug 8 21:46 rsth24-c000c0i14l0
> brw------- 1 root root 8, 0 Aug 8 21:46 sdh24-c000c0i0l0
> brw------- 1 root root 8, 1 Aug 8 21:46 sdh24-c000c0i0l0p1
> ...
>
> which contains the mapping between major/minor (st_dev) and
> device type, controller type, controller, channel, scsi id, lun, partition
> ( sd h24 - c000 c0 i0 l0 p1 )
>
> $man scsidev
> ...
> The device nodes that scsidev creates look something like
> "sdh4-334c0i0l0p1". In this case, the various components
> of the name represent physical attributes about the device
> or the host adapter to which it is connected. To begin
> with, the "h4" indicates that it is connected to an
> Adaptec 1542. The "-334" is a means of identifying which
> 1542 the device is attached to (since linux supports more
> than one 1542 in the system at the same time). The "c0"
> represents the channel number (since some host adapters
> can drive multiple scsi busses). The "i0l0" indicates
> that this device is scsi ID 0, with lun 0. Finally the
> "p1" indicated partition number 1.
> ...
>
> Or, check out the source for scsidev.
> ftp://tsx-11.mit.edu/pub/linux/ALPHA/scsi/
>
> Regards,
> /Karl
>
> -----------------------------------------------------------------------
> Karl Hammar Asp� Data [EMAIL PROTECTED]
> Lilla Asp� 2340 +46 173 140 57 Networks
> S-742 94 �sthammar +46 70 511 97 84 Computers
> Sweden Consulting
> -----------------------------------------------------------------------
>
> From: BenHanokh Gabriel <[EMAIL PROTECTED]>
> Subject: Re: finding target id of a scsi device
> Date: Tue, 08 Aug 2000 10:28:47 +0300
>
> > hi
> >
> > i don't think this is the right function, i don't have file-descriptor to the
> > device, but the a dev_t referance to it.
> > it is also not a terminal device, but a disk block device( SCSI hard-disk )
> >
> > /gabi
> >
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to [EMAIL PROTECTED]
