From a82a9538dd30471e6428a2d55e91e986c439866b Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Mon, 19 Aug 2013 23:57:30 -0700 Subject: 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 Cc: Hannes Reinecke Cc: Martin Petersen Cc: Chris Mason Cc: James Bottomley Cc: Nicholas Bellinger Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_file.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/target/target_core_file.c') diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c index bc3245dfcdf7..c5448a5d8b73 100644 --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -547,11 +547,9 @@ fd_execute_unmap(struct se_cmd *cmd) } static sense_reason_t -fd_execute_rw(struct se_cmd *cmd) +fd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, + enum dma_data_direction data_direction) { - struct scatterlist *sgl = cmd->t_data_sg; - u32 sgl_nents = cmd->t_data_nents; - enum dma_data_direction data_direction = cmd->data_direction; struct se_device *dev = cmd->se_dev; int ret = 0; -- cgit v1.2.3