[libvirt] Re: [Libvir] ISCSI howto, example, etc?

[Chris Lalancette]

Stefan de Konink wrote:
> Fix:
>     snprintf(sysfs_path, PATH_MAX,
>              "/sys/class/iscsi_session/session%s/device/"
>              "target%d:%d:%d/%d:%d:%d:%d",
>              session, target, channel, id, target, channel, id, lun);
> 
> 
>   (so remove /block)
> 
>            /* OK, not . or ..; let's see if it is a SCSI device */
>         if (len > 8 &&
>             block_dirent->d_name[0] == 'b' &&
>             block_dirent->d_name[1] == 'l' &&
>             block_dirent->d_name[2] == 'o' &&
>             block_dirent->d_name[3] == 'c' &&
>             block_dirent->d_name[4] == 'k' &&
>             block_dirent->d_name[5] == ':' &&
>             block_dirent->d_name[6] == 's' &&
>             block_dirent->d_name[7] == 'd') {
>             /* looks like a scsi device, smells like scsi device; it must be
>                a scsi device */
>             dev = (char *) calloc(sizeof(char), len - 5);
>             strncpy(dev, &(block_dirent->d_name[6]), (len - 6));
> 
> I guess that can be come a strncmp. And for sake of memory management an
> if (dev != NULL) would be good too.

Yes, except the problem with your patch is that it will probably break the
kernel I made the fixes for originally, which was either 2.6.23 or 2.6.24 (and
which had the /sys/class/iscsi_session/session9/device/target9:0:0:0/
9:0:0:0/block/sdd type paths).  We may be able to come up with a hybrid solution
that will work on both cases, though.

Chris Lalancette