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authorMike Christie <michaelc@cs.wisc.edu>2006-10-16 18:09:42 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-10-25 15:14:05 -0700
commitb5072ea0910e5c8c79b8313e0ef70ca763983dbf (patch)
tree518228880851f5067553543bca314fa96436168d /drivers/scsi/libiscsi.c
parent5831c737f724aa6a655a908d202221f079f30036 (diff)
[SCSI] libiscsi: fix logout pdu processing
According to the iscsi RFC, we cannot send other requests if we have sent a logout pdu. This patch enforces this requirement by blocking the session and suspending the send thread. Userspace decides if we restart the connection or if we just free everything. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index f5a9560b357f..2865ebd557ef 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -578,6 +578,27 @@ void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err)
}
EXPORT_SYMBOL_GPL(iscsi_conn_failure);
+static int iscsi_xmit_imm_task(struct iscsi_conn *conn)
+{
+ struct iscsi_hdr *hdr = conn->mtask->hdr;
+ int rc, was_logout = 0;
+
+ if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT) {
+ conn->session->state = ISCSI_STATE_IN_RECOVERY;
+ iscsi_block_session(session_to_cls(conn->session));
+ was_logout = 1;
+ }
+ rc = conn->session->tt->xmit_mgmt_task(conn, conn->mtask);
+ if (rc)
+ return rc;
+
+ if (was_logout) {
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+ return -ENODATA;
+ }
+ return 0;
+}
+
/**
* iscsi_data_xmit - xmit any command into the scheduled connection
* @conn: iscsi connection
@@ -623,7 +644,7 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
conn->ctask = NULL;
}
if (conn->mtask) {
- rc = tt->xmit_mgmt_task(conn, conn->mtask);
+ rc = iscsi_xmit_imm_task(conn);
if (rc)
goto again;
/* done with this in-progress mtask */
@@ -638,7 +659,7 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
list_add_tail(&conn->mtask->running,
&conn->mgmt_run_list);
spin_unlock_bh(&conn->session->lock);
- rc = tt->xmit_mgmt_task(conn, conn->mtask);
+ rc = iscsi_xmit_imm_task(conn);
if (rc)
goto again;
}