target: pass sense_reason as a return value
Pass the sense reason as an explicit return value from the I/O submission
path instead of storing it in struct se_cmd and using negative return
values. This cleans up a lot of the code pathes, and with the sparse
annotations for the new sense_reason_t type allows for much better
error checking.
(nab: Convert spc_emulate_modesense + spc_emulate_modeselect to use
sense_reason_t with Roland's MODE SELECT changes)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 342a6a6..3ccef83 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -309,7 +309,8 @@
return 1;
}
-static int fd_execute_sync_cache(struct se_cmd *cmd)
+static sense_reason_t
+fd_execute_sync_cache(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct fd_dev *fd_dev = FD_DEV(dev);
@@ -345,17 +346,16 @@
if (immed)
return 0;
- if (ret) {
- cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ if (ret)
target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
- } else {
+ else
target_complete_cmd(cmd, SAM_STAT_GOOD);
- }
return 0;
}
-static int fd_execute_rw(struct se_cmd *cmd)
+static sense_reason_t
+fd_execute_rw(struct se_cmd *cmd)
{
struct scatterlist *sgl = cmd->t_data_sg;
u32 sgl_nents = cmd->t_data_nents;
@@ -388,10 +388,9 @@
}
}
- if (ret < 0) {
- cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- return ret;
- }
+ if (ret < 0)
+ return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
if (ret)
target_complete_cmd(cmd, SAM_STAT_GOOD);
return 0;
@@ -515,7 +514,8 @@
.execute_sync_cache = fd_execute_sync_cache,
};
-static int fd_parse_cdb(struct se_cmd *cmd)
+static sense_reason_t
+fd_parse_cdb(struct se_cmd *cmd)
{
return sbc_parse_cdb(cmd, &fd_sbc_ops);
}
