Here's the situation. My kernel module is passed a file during initialization, and it needs to check that the file is a SCSI device file. There is an ioctl that all SCSI device drivers respond to, so it would be easy to do this from a userspace program. But is it legal to call the ioctl entry point from within my kernel module? The ioctl requires a pointer to a buffer located in userspace. I could pass a pointer to a buffer in the kernel, but that's not the same. Probably there are some architectures or variants of Linux where one cannot be substituted for the other (although I don't _know_ if that's true). Anyway, how can I do this? It seems ironic that there are aspects of the kernel that are more easily accessible from a user process than from within the kernel itself. Alan Stern -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
