MFC r275920, r276127: Pass real optimal transfer size supported by backend.

For files and ZVOLs that is 1MB now, not 128K.

1 files changed, 8 insertions, 1 deletions

diff --git a/sys/cam/ctl/ctl_backend.h b/sys/cam/ctl/ctl_backend.h
index 5e0af5c..93a530c 100644
--- a/sys/cam/ctl/ctl_backend.h
+++ b/sys/cam/ctl/ctl_backend.h
@@ -146,10 +146,16 @@ typedef void (*be_lun_config_t)(void *be_lun,
  *
  * pblockexp is the log2() of number of LBAs on the LUN per physical sector.
  *
- * pblockoff is the lowest LBA on the LUN aligned ot physical sector.
+ * pblockoff is the lowest LBA on the LUN aligned to physical sector.
+ *
+ * ublockexp is the log2() of number of LBAs on the LUN per UNMAP block.
+ *
+ * ublockoff is the lowest LBA on the LUN aligned to UNMAP block.
  *
  * atomicblock is the number of blocks that can be written atomically.
  *
+ * opttxferlen is the number of blocks that can be written in one operation.
+ *
  * req_lun_id is the requested LUN ID.  CTL only pays attention to this
  * field if the CTL_LUN_FLAG_ID_REQ flag is set.  If the requested LUN ID is
  * not available, the LUN addition will fail.  If a particular LUN ID isn't
@@ -197,6 +203,7 @@ struct ctl_be_lun {
 	uint16_t		ublockexp;	/* passed to CTL */
 	uint16_t		ublockoff;	/* passed to CTL */
 	uint32_t		atomicblock;	/* passed to CTL */
+	uint32_t		opttxferlen;	/* passed to CTL */
 	uint32_t		req_lun_id;	/* passed to CTL */
 	uint32_t		lun_id;		/* returned from CTL */
 	uint8_t			serial_num[CTL_SN_LEN];	 /* passed to CTL */