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authorMike Christie <michaelc@cs.wisc.edu>2009-04-21 15:32:31 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-04-27 10:09:51 -0500
commit9a6510eb3f030cedba32664498a610dc6d084d46 (patch)
tree694b56e08f2a89000a9e312ce4d6f83a50878263
parent70932935b61ee3dcc5a419ec4c367feb2ff808e4 (diff)
[SCSI] iscsi_tcp: don't fire conn error if pdu init fails
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@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
-rw-r--r--drivers/scsi/iscsi_tcp.c2
-rw-r--r--drivers/scsi/libiscsi_tcp.c5
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index b3e5e08e44ab..f97fc7e9de79 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 91f8ce4d8d08..b579ca9f4836 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;
}