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    SubjectRe: [PATCH 0/3] vfs: plug some holes involving LAST_BIND symlinks and file bind mounts (try #5)
    On Tue, 24 Nov 2009, Jeff Layton wrote:
    > Since it's clear that these symlinks do need to have special semantics,
    > perhaps the approach you suggest would be the best thing. I'll have to
    > think about it a bit more.

    open() is not the only thing you need to think about. Anything that
    checks read or write permission on the inode (truncate, utimes,
    *xattr) would have to be changed to respect the open mode.

    See, this is not just about hacking the proc follow_symlink code to
    check some lookup intent. It's about changing the permission checking
    mechanism for theses beasts. And since the permission checking is
    inode based, this is not at all trivial to do.

    I still believe leaving the current semantics and documenting them is
    the best option.


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      Last update: 2009-11-24 12:55    [W:0.018 / U:0.232 seconds]
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