On Thu, Jun 5, 2008 at 5:35 AM, Matthew Wilcox <matthew@xxxxxx> wrote: > On Thu, Jun 05, 2008 at 12:27:54AM -0600, Andreas Dilger wrote: >> To be honest, however, having the information exported only via sysfs >> is a bit ugly IMHO. I've had all sorts of grief with settings there >> because there isn't always a match between the device that is being >> specified by the user and what appears in sysfs (e.g. /dev/disk/by-id/foo >> doesn't match /sys/block/sda) and hoops have to be jumped through to >> find this mapping, before parsing a text value in C. > > readlink() is too hard? > > $ readlink /dev/disk/by-id/ata-FUJITSU_MHV2080AH_NT61T6325UGM > ../../hda > >> Having an ioctl() that can be called on the block device (getting >> the right device regardless of its name) seems a lot more useful to >> applications in my experience, unless you are using a script. > > It's certainly easier. > We've had this discussion before: http://marc.info/?t=120641785300005&r=6&w=2 ...and it resulted in this patch that is pending is Greg's tree: http://git.kernel.org/?p=linux/kernel/git/gregkh/patches.git;a=blob;f=driver-core/sysfs-add-sys-dev-char-block-to-lookup-sysfs-path-by-major-minor.patch;h=ed9a41a564f73db74f7260f24552352ab86bc893;hb=HEAD Regards, Dan -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
