zfsonlinux/zfs — pull request #1516 by lidongyang (2013-06-13 04:27:56+00:00)
Title: SEEK_DATA/SEEK_HOLE support

Add SEEK_DATA/SEEK_HOLE by creating our own zpl_file_llseek().
Tested with xfstests 285 and 286. test0[7-9] of 285 will try to reserve
the blocks first via fallocate(2), we will fail there as currently we
don't support that.

Signed-off-by: Li Dongyang
Closes #1384