Nicholas Bellinger d0c8b259f8 target/iblock: Use backend REQ_FLUSH hint for WriteCacheEnabled status ... This patch allows IBLOCK to check block hints in request_queue->flush_flags when reporting current backend device WriteCacheEnabled status to a remote SCSI initiator port. This is done via a se_subsystem_api->get_write_cache() call instead of a backend se_device creation time flag, as we expect REQ_FLUSH bits to possibly change from an underlying blk_queue_flush() by the SCSI disk driver, or internal raw struct block_device driver usage. Also go ahead and update iblock_execute_rw() bio I/O path code to use REQ_FLUSH + REQ_FUA hints when determining WRITE_FUA usage, and make SPC emulation code use a spc_check_dev_wce() helper to handle both types of cases for virtual backend subsystem drivers. (asias: Drop unnecessary comparsion operators) Reported-by: majianpeng <majianpeng@gmail.com> Cc: majianpeng <majianpeng@gmail.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: James Bottomley <JBottomley@Parallels.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>		2013-02-13 11:27:51 -08:00
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configfs_macros.h	doc: fix broken references	2011-09-27 18:08:04 +02:00
target_core_backend.h	target/iblock: Use backend REQ_FLUSH hint for WriteCacheEnabled status	2013-02-13 11:27:51 -08:00
target_core_base.h	target: change sprintf to snprintf in transport_dump_vpd_ident	2013-02-13 11:27:31 -08:00
target_core_configfs.h	[SCSI] target: add initial statistics	2011-03-23 11:36:50 -05:00
target_core_fabric.h	target/iscsi_target: Add NodeACL tags for initiator group support	2012-12-13 14:18:09 -08:00
target_core_fabric_configfs.h	[SCSI] target: Add LIO target core v4.0.0-rc6	2011-01-14 10:12:29 -06:00