From: Ned Bass <bass6@llnl.gov>
Date: Wed, 12 Dec 2012 23:55:51 +0000 (-0800)
Subject: Avoid ELOOP on auto-mounted snapshots
X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=commitdiff_plain;h=7afcf5b1da83549bfba70a61fae7a00eaa63c2b0;hp=7afcf5b1da83549bfba70a61fae7a00eaa63c2b0;p=zfs.git

Avoid ELOOP on auto-mounted snapshots

Ensure that the path member pointers are associated with the
newly-mounted snapshot when zpl_snapdir_automount() returns.  Otherwise
the follow_automount() function may be called repeatedly, leading to an
incorrect ELOOP error return. This problem was observed as a 'Too many
levels of symbolic links' error from user-space commands accessing an
unmounted snapshot in the .zfs/snapshot directory.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #816
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