Messages in this thread |  | | Subject | Re: LANANA: To Pending Device Number Registrants | Date | Tue, 15 May 2001 10:26:32 +0100 (BST) | From | Alan Cox <> |
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> But the fact remains that some users want to (a) avoid devfs and (b) have > static maintenance. And I'm ok with that too, but only if the static major > number is in the form of a _generic_ number that has absolutely nothing to > do with any specific drivers (which is why I'd be perfecly ok with still > adding a "disk" major number, but which is why I do NOT want to have Peter > give out "the random number of today" to various stupid device drivers). > So we seem to be in violent agreement here.
Ok.
Then we need to open the second discussion which is:
Given a file handle 'X' how do I find out what ioctl groups I should apply to it. So we can go from
if(MAJOR(st.st_rdev) == ST_MAJOR) issue_scsi_ioctls else if(MAJOR(st.st_rdev) == FTAPE_MAJOR) issue_ftape_ioctls else .. else error
to
/* Use scsi if possible [scsi, ide-scsi, usb-scsi, ...] */ if(HAS_FEATURE_SET(fd, "scsi-tape")) ... else if(HAS_FEATURE_SET(fd, "floppy-tape")) ..
Alan
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