Christoph Hellwig 4246a0b63b block: add a bi_error field to struct bio ... Currently we have two different ways to signal an I/O error on a BIO: (1) by clearing the BIO_UPTODATE flag (2) by returning a Linux errno value to the bi_end_io callback The first one has the drawback of only communicating a single possible error (-EIO), and the second one has the drawback of not beeing persistent when bios are queued up, and are not passed along from child to parent bio in the ever more popular chaining scenario. Having both mechanisms available has the additional drawback of utterly confusing driver authors and introducing bugs where various I/O submitters only deal with one of them, and the others have to add boilerplate code to deal with both kinds of error returns. So add a new bi_error field to store an errno value directly in struct bio and remove the existing mechanisms to clean all this up. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: NeilBrown <neilb@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2015-07-29 08:55:15 -06:00
..
aoe.h	aoe: Convert to immutable biovecs	2013-11-23 22:33:52 -08:00
aoeblk.c	block: remove artifical max_hw_sectors cap	2014-10-21 14:02:54 -06:00
aoechr.c	aoe: replace kmalloc and then memcpy with kmemdup	2013-04-30 17:04:08 -07:00
aoecmd.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
aoedev.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
aoemain.c	aoe: whitespace cleanup	2012-12-17 17:15:24 -08:00
aoenet.c	aoe: update copyright date	2013-07-03 16:08:05 -07:00
Makefile	drivers/block/aoe/Makefile: replace the use of <module>-objs with <module>-y	2011-01-19 08:25:02 -07:00