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    SubjectRe: /proc/net/ bad hard links count [Was: 2.6.23-rc8-mm2]
    Date
    Jiri Slaby <jirislaby@gmail.com> writes:

    > On 09/27/2007 11:22 AM, Andrew Morton wrote:
    >>
    > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc8/2.6.23-rc8-mm2/

    Yep.

    > # find /proc >/dev/null
    > find: WARNING: Hard link count is wrong for /proc/net: this may be a bug in your
    > filesystem driver. Automatically turning on find's -noleaf option. Earlier
    > results may have failed to include directories that should have been searched.
    > # stat net
    > File: `net'
    > Size: 0 Blocks: 0 IO Block: 1024 directory
    > Device: 3h/3d Inode: 4026531864 Links: 2
    > Access: (0555/dr-xr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
    > Access: 2007-09-28 18:21:24.651209759 +0200
    > Modify: 2007-09-28 18:21:24.651209759 +0200
    > Change: 2007-09-28 18:21:24.651209759 +0200
    > # stat net/
    > File: `net/'
    > Size: 0 Blocks: 0 IO Block: 1024 directory
    > Device: 3h/3d Inode: 4026531909 Links: 4
    > Access: (0555/dr-xr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
    > Access: 2007-09-28 18:26:48.813048220 +0200
    > Modify: 2007-09-28 18:26:48.813048220 +0200
    > Change: 2007-09-28 18:26:48.813048220 +0200
    >
    > hmm, this is some kind of weirdness :)

    Yes.

    I can explain it. For the network namespace stuff we need special handling
    of /proc/net so that depending on the network namespace we are resolving
    against you see a different behavior. So you actually are observing
    two different directories, one being a magic invisible symlink to the
    other.

    Currently I am resolving against current (which has a number of
    limitations) and the weird ugly effect you are current seeing.

    So it looks like I need to either make /proc/net a symlink to
    /proc/self/net or make the network namespace something that we capture
    at mount time of /proc.

    This was my don't get hung up on this implementation detail version.
    Thanks for pointing out it has user visible problems. I will see
    what I can do to resolve this.

    Eric
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