From: Mike Christie <michaelc@xxxxxxxxxxx>
If a command's scsi cmd pdu setup fails then we can just fail
the IO to the scsi layer. If a DATA_OUT for a R2T fails then
we will want to drop the session, because it means we got a
bad request from the target (iscsi protocol error).
This patch has us propogate the error upwards so libiscsi_tcp
or libiscsi can decide what the best action is to take. It
also fixes a bug where we could try to grab the session lock
while holding it, because if iscsi_tcp drops the session in the
pdu setup callout the session lock is held when setting up the
scsi cmd pdu.
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
---
drivers/scsi/iscsi_tcp.c | 2 +-
drivers/scsi/libiscsi_tcp.c | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index b3e5e08..f97fc7e 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -463,7 +463,7 @@ static int iscsi_sw_tcp_pdu_init(struct iscsi_task *task,
}
if (err) {
- iscsi_conn_failure(conn, err);
+ /* got invalid offset/len */
return -EIO;
}
return 0;
diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
index 91f8ce4..b579ca9 100644
--- a/drivers/scsi/libiscsi_tcp.c
+++ b/drivers/scsi/libiscsi_tcp.c
@@ -1036,8 +1036,11 @@ flush:
rc = conn->session->tt->init_pdu(task, r2t->data_offset + r2t->sent,
r2t->data_count);
- if (rc)
+ if (rc) {
+ iscsi_conn_failure(conn, ISCSI_ERR_XMIT_FAILED);
return rc;
+ }
+
r2t->sent += r2t->data_count;
goto flush;
}
--
1.6.0.6
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