On Tue, 23 Jun 2009, David Howells wrote: > Reference count on which module? This would not take a reference on > the device driver as it would not refer to it, but would still have > a file struct, an inode struct and a dentry struct on the underlying > fs. So how about the following: provide a new open flag O_FILESYSTEM, meaning it opens the file on the underlying filesystem instead of the device/socket/symlink/etc... Add a new inode->i_filesystem_fop pointer which is used instead of inode->i_fop in case if O_FILESYSTEM. If ->i_filesystem_fop isn't set by the filesystem, fall back to a default which returns -EBADF for all operations (except open). Define O_NOACC as 3. On open(..., O_FILESYSTEM | O_NOACC) require no privileges on the file. AFS would set up i_filesystem_fop with its ->ioctl() function. No special handling needed for revoke()... That would work, no? Thanks, Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
