staging: lustre: lov: return minimal FIEMAP for released files
authorBruno Faccini <bruno.faccini@intel.com>
Tue, 12 Apr 2016 20:14:13 +0000 (16:14 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 26 Apr 2016 22:13:13 +0000 (15:13 -0700)
commitad1daf47c98f524ed6a517486a10e4114b450ff8
tree226e3da8f3d47bacc24c7b8cf4322a36b949eae7
parentb3ffe666ca1a747ce399d7d0966a132235e40e66
staging: lustre: lov: return minimal FIEMAP for released files

Since st_blocks = NULL is returned for released files, FIEMAP
should at least return a minimal mapping to make users aware
that file contains data but it is not immediately available.
This will make coreutils and tools such tar happy and have
them presume file is sparse.

Also, add a new test_228 in sanity-hsm to verify it works
for "[cp,tar] --sparse" commands.

Also fix a LBUG ("lov_fiemap()) ASSERTION( fm_local ) failed")
likely to occur when no-object/ENOMEM conditions and also now
when released.

Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3864
Reviewed-on: http://review.whamcloud.com/7584
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Aurelien Degremont <aurelien.degremont@cea.fr>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/lustre/lustre/lov/lov_obd.c