Re: Finding hardlinks

From: Mikulas Patocka
Date: Fri Dec 29 2006 - 20:05:05 EST

On Fri, 29 Dec 2006, Trond Myklebust wrote:

On Thu, 2006-12-28 at 19:14 +0100, Mikulas Patocka wrote:
Why don't you rip off the support for colliding inode number from the
kernel at all (i.e. remove iget5_locked)?

It's reasonable to have either no support for colliding ino_t or full
support for that (including syscalls that userspace can use to work with
such filesystem) --- but I don't see any point in having half-way support
in kernel as is right now.

What would ino_t have to do with inode numbers? It is only used as a
hash table lookup. The inode number is set in the ->getattr() callback.

The question is: why does the kernel contain iget5 function that looks up according to callback, if the filesystem cannot have more than 64-bit inode identifier?

This lookup callback just induces writing bad filesystems with coliding inode numbers. Either remove coda, smb (and possibly other) filesystems from the kernel or make a proper support for userspace for them.

The situation is that current coreutils 6.7 fail to recursively copy directories if some two directories in the tree have coliding inode number, so you get random data corruption with these filesystems.

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