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[SCSI] sd: WRITE SAME(16) / UNMAP support
authorMartin K. Petersen <martin.petersen@oracle.com>
Thu, 26 Nov 2009 17:00:40 +0000 (12:00 -0500)
committerJames Bottomley <James.Bottomley@suse.de>
Thu, 10 Dec 2009 14:54:15 +0000 (08:54 -0600)
commite339c1a7c09ef736dca7b3a4353c7742557d9f8f
tree60f7bc7c1867f180262dab01cc8c047967d728cdtree | snapshot
parentcc9b2e9f6603190c009e5d2629ce8e3f99571346commit | diff
[SCSI] sd: WRITE SAME(16) / UNMAP support

Implement a function for handling discard requests that sends either
WRITE SAME(16) or UNMAP(10) depending on parameters indicated by the
device in the block limits VPD.

Extract unmap constraints and report them to the block layer.

Based in part by a patch by Christoph Hellwig <hch@lst.de>.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
drivers/scsi/sd.c diff | blob | history
drivers/scsi/sd.h diff | blob | history
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