From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch adds bs_sg_init() that is called from existing usr/target.c:tgt_device_create()
code via struct backingstore_template->bs_init() in order to setup the passthrough specific
queue and completion handlers for struct scsi_lu->cmd_perform() and ->cmd_done().
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
---
usr/bs_sg.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/usr/bs_sg.c b/usr/bs_sg.c
index 8baa480..2fcb0d2 100644
--- a/usr/bs_sg.c
+++ b/usr/bs_sg.c
@@ -192,6 +192,25 @@ static int init_sg_device(int fd)
return 0;
}
+static int bs_sg_init(struct scsi_lu *lu)
+{
+ /*
+ * Setup struct scsi_lu->cmd_perform() passthrough pointer
+ * (if available) for the underlying device type.
+ */
+ lu->cmd_perform = &target_cmd_perform_passthrough;
+ if (!(lu->cmd_perform)) {
+ eprintf("Unable to locate lu->cmd_perform() for bs_sg\n");
+ return -1;
+ }
+ /*
+ * Setup struct scsi_lu->cmd_done() passthrough pointer using
+ * usr/target.c:__cmd_done_passthrough().
+ */
+ lu->cmd_done = &__cmd_done_passthrough;
+ return 0;
+}
+
static int bs_sg_open(struct scsi_lu *lu, char *path, int *fd, uint64_t *size)
{
int sg_fd, err;
@@ -238,6 +257,7 @@ static int bs_sg_cmd_done(struct scsi_cmd *cmd)
static struct backingstore_template sg_bst = {
.bs_name = "sg",
.bs_datasize = 0,
+ .bs_init = bs_sg_init,
.bs_open = bs_sg_open,
.bs_close = bs_sg_close,
.bs_cmd_submit = bs_sg_cmd_submit,
--
1.5.6.5
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