[PATCH 0/8] block: T10/DIF Fixes and cleanups

[Dmitry Monakhov]

This patch set fix various problems spotted during T10/DIF integrity machinery testing.

TOC:
## General bulletproof protection for block layer
0001 Guard bvec iteration logic
## Fix various bugs in T10/DIF/DIX infrastructure
0002 bio integrity: Do not allocate integrity context for 
0003 bio integrity: save original iterator for verify stag
0004 bio integrity: bio_trim should truncate integrity vec
0005 bio integrity: fix interface for bio_integrity_trim
## Cleanup T10/DIF/DIX infrastructure
0006 bio integrity add bio_integrity_setup helper
0007 T10 Move opencoded contants to common header
## Fix tcm_fileio info leak
0008 tcm_fileio: Prevent information leak for short reads

Testcase: http://marc.info/?l=linux-scsi&m=149087997013452&w=2