Make CTL frontends report kern_data_resid for under-/overruns.

It seems like kern_data_resid was never really implemented.  This change
finally does it.  Now frontends update this field while transferring data,
while CTL/backends getting it can more flexibly handle the result.
At this point behavior should not change significantly, still reporting
errors on write overrun, but that may be changed later, if we decide so.

CAM target frontend still does not properly handle overruns due to CAM API
limitations.  We may need to add some fields to struct ccb_accept_tio to
pass information about initiator requested transfer size(s).

MFC after:	2 weeks

1 files changed, 0 insertions, 11 deletions

diff --git a/sys/cam/ctl/ctl_tpc.c b/sys/cam/ctl/ctl_tpc.c
index ee9bd7393920..9e1cfa852edb 100644
--- a/sys/cam/ctl/ctl_tpc.c
+++ b/sys/cam/ctl/ctl_tpc.c
@@ -293,7 +293,6 @@ ctl_inquiry_evpd_tpc(struct ctl_scsiio *ctsio, int alloc_len)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 	ctsio->kern_sg_entries = 0;
 
@@ -470,7 +469,6 @@ ctl_receive_copy_operating_parameters(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 
 	data = (struct scsi_receive_copy_operating_parameters_data *)ctsio->kern_data_ptr;
@@ -568,7 +566,6 @@ ctl_receive_copy_status_lid1(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 
 	data = (struct scsi_receive_copy_status_lid1_data *)ctsio->kern_data_ptr;
@@ -646,7 +643,6 @@ ctl_receive_copy_failure_details(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 
 	data = (struct scsi_receive_copy_failure_details_data *)ctsio->kern_data_ptr;
@@ -718,7 +714,6 @@ ctl_receive_copy_status_lid4(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 
 	data = (struct scsi_receive_copy_status_lid4_data *)ctsio->kern_data_ptr;
@@ -1730,7 +1725,6 @@ ctl_extended_copy_lid1(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_ptr = malloc(len, M_CTL, M_WAITOK);
 		ctsio->kern_data_len = len;
 		ctsio->kern_total_len = len;
-		ctsio->kern_data_resid = 0;
 		ctsio->kern_rel_offset = 0;
 		ctsio->kern_sg_entries = 0;
 		ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED;
@@ -1885,7 +1879,6 @@ ctl_extended_copy_lid4(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_ptr = malloc(len, M_CTL, M_WAITOK);
 		ctsio->kern_data_len = len;
 		ctsio->kern_total_len = len;
-		ctsio->kern_data_resid = 0;
 		ctsio->kern_rel_offset = 0;
 		ctsio->kern_sg_entries = 0;
 		ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED;
@@ -2083,7 +2076,6 @@ ctl_populate_token(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_ptr = malloc(len, M_CTL, M_WAITOK);
 		ctsio->kern_data_len = len;
 		ctsio->kern_total_len = len;
-		ctsio->kern_data_resid = 0;
 		ctsio->kern_rel_offset = 0;
 		ctsio->kern_sg_entries = 0;
 		ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED;
@@ -2247,7 +2239,6 @@ ctl_write_using_token(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_ptr = malloc(len, M_CTL, M_WAITOK);
 		ctsio->kern_data_len = len;
 		ctsio->kern_total_len = len;
-		ctsio->kern_data_resid = 0;
 		ctsio->kern_rel_offset = 0;
 		ctsio->kern_sg_entries = 0;
 		ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED;
@@ -2423,7 +2414,6 @@ ctl_receive_rod_token_information(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 
 	data = (struct scsi_receive_copy_status_lid4_data *)ctsio->kern_data_ptr;
@@ -2504,7 +2494,6 @@ ctl_report_all_rod_tokens(struct ctl_scsiio *ctsio)
 		ctsio->kern_data_len = alloc_len;
 		ctsio->kern_total_len = alloc_len;
 	}
-	ctsio->kern_data_resid = 0;
 	ctsio->kern_rel_offset = 0;
 
 	data = (struct scsi_report_all_rod_tokens_data *)ctsio->kern_data_ptr;