Re: 2.4.20 autofs: non-toplevel mounts broken? (SOLVED!)

From: Bob Proulx (bob_at_proulx.com)
Date: 07/31/03

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    Date: Thu, 31 Jul 2003 15:02:39 -0600
To: debian-user@lists.debian.org

    Rob Sims wrote:
    > autofs4; the autofs module doesn't have the hierarchical support.

    Yes! Success! Thank you very much for that answer.

    Bob

    Here is a summary for the archive and search engines:

    Bob Proulx wrote:
    > Jul 29 22:43:52 misery automount[26757]: mount(nfs): calling mkdir_path /net/torment/mnt/a
    > Jul 29 22:43:52 misery automount[26757]: mount(nfs): mkdir_path torment/mnt/a failed: Operation not permitted

    > After upgrading to 2.4.20 I seem to have lost the ability to autofs
    > mount non-toplevel mounts. This worked in 2.4.18. Does not work in
    > 2.4.20. Has anyone else seen this?

    The kernel version was a red herring. It had nothing to do with the
    kernel version. In the intervening time I was able to reduce that the
    same version the kernel worked or did not work depending upon the
    kernel configuration.

    Rob's answer solved the mystery. The first kernel worked because I
    had compiled everything into it and the second one did not because I
    made it modular and autofs was getting loaded automatically while
    autofs4 was not.

    Getting to root cause, here was the different kernel configurations
    which caused this behavior. I hadn't noticed this and could see
    'autofs' in the modules and did not know there was another version of
    it available.

    Old config:
      CONFIG_AUTOFS_FS=m
      CONFIG_AUTOFS4_FS=y <-- y so this is compiled in the kernel
    New config:
      CONFIG_AUTOFS_FS=m
      CONFIG_AUTOFS4_FS=m <-- no longer y and so needs to be specified

    The new config works fine if I included autofs4 in /etc/modules.
    (Actually I just turned off nfs, 'rmmod autofs', 'modprobe autofs4'
    and turned nfs back on so I did not even need to reboot. 

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