storage/posix: Fix device number handling.

There are two fixes in this patch:

1) If the device number has changed, do a fresh stat on the export
   directory and if it matches the device number of the file,
   assume a remount happened and remember the new device number
   as official (this helps automounted export volumes).

2) Don't log the "device number changed" message if it is due
   to a stat on ".." (in posix_readdirp), as it could be because
   ".." leads us out of the exported volume.

Signed-off-by: Vikas Gorur <vikas@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 576 (crossing device (2056) + fuse LOOKUP error)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=576

0 files changed, 0 insertions, 0 deletions