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authorNicholas Bellinger <nab@daterainc.com>2013-08-19 23:57:30 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2013-09-09 14:29:28 -0700
commita82a9538dd30471e6428a2d55e91e986c439866b (patch)
tree439d70dae8fd42cc19922a31d1ac2a6ecf9c32fb /virt
parent818b571ca053e19be336de1cc75c01dd5445e969 (diff)
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target: Allow sbc_ops->execute_rw() to accept SGLs + data_direction
COMPARE_AND_WRITE expects to be able to send down a DMA_FROM_DEVICE to obtain the necessary READ payload for comparision against the first half of the WRITE payload containing the verify user data. Currently virtual backends expect to internally reference SGLs, SGL nents, and data_direction, so change IBLOCK, FILEIO and RD sbc_ops->execute_rw() to accept this values as function parameters. Also add default sbc_execute_rw() handler for the typical case for cmd->execute_rw() submission using cmd->t_data_sg, cmd->t_data_nents, and cmd->data_direction). v2 Changes: - Add SCF_COMPARE_AND_WRITE command flag - Use sbc_execute_rw() for normal cmd->execute_rw() submission with expected se_cmd members. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
Diffstat (limited to 'virt')
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