Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > Why don't you just use mkdir with S_ISVTX set, or something like that? > > Actually, since this is apparently a different filetype, the _logical_ > thing to do is to use "mknod()". Actually, in many ways, they're more akin to symlinks (and are implemented as symlinks with funny attributes). It's a shame that symlinkat() doesn't have an at_flags parameter. mknod() isn't otherwise supported on AFS as there aren't any UNIX special files. > You presumably need a new type _anyway_ for stat() and/or the filldir > d_type field. Or do you always want to make it look exactly like a > directory to all user space? That's already dealt with. They're presented as directories with STATX_ATTR_AUTOMOUNT showing when you call statx() on them. You can also use readlink() to extract the target if they haven't been mounted over yet. Inside the kernel, they have no ->lookup() op, so DCACHE_AUTODIR_TYPE is set on the dentry and there's a ->d_automount() op. The inode has S_AUTOMOUNT set. That's all taken care of when the inode is created and the dentry is instantiated. Davod
