[SCSI] iscsi: check header digests for mgmt tasks
From Wang Zhenyu:
check header digest for cmd and mgmt tasks
Signed-off-by: Wang Zhenyu <zhenyu.z.wang@intel.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index feb8731..2d12355 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -581,6 +581,12 @@
crypto_digest_digest(conn->rx_tfm, &sg, 1, (u8 *)&cdgst);
rdgst = *(uint32_t*)((char*)hdr + sizeof(struct iscsi_hdr) +
conn->in.ahslen);
+ if (cdgst != rdgst) {
+ printk(KERN_ERR "iscsi_tcp: itt %x: hdrdgst error "
+ "recv 0x%x calc 0x%x\n", conn->in.itt, rdgst,
+ cdgst);
+ return ISCSI_ERR_HDR_DGST;
+ }
}
/* save opcode for later */
@@ -610,13 +616,6 @@
conn->in.ahslen, conn->in.datalen);
if (conn->in.itt < session->cmds_max) {
- if (conn->hdrdgst_en && cdgst != rdgst) {
- printk(KERN_ERR "iscsi_tcp: itt %x: hdrdgst error "
- "recv 0x%x calc 0x%x\n", conn->in.itt, rdgst,
- cdgst);
- return ISCSI_ERR_HDR_DGST;
- }
-
ctask = (struct iscsi_cmd_task *)session->cmds[conn->in.itt];
if (!ctask->sc) {
@@ -1128,8 +1127,7 @@
*/
rc = iscsi_hdr_recv(conn);
if (!rc && conn->in.datalen) {
- if (conn->datadgst_en &&
- conn->in.opcode != ISCSI_OP_LOGIN_RSP) {
+ if (conn->datadgst_en) {
BUG_ON(!conn->data_rx_tfm);
crypto_digest_init(conn->data_rx_tfm);
}
@@ -1179,8 +1177,7 @@
}
conn->in.copy -= conn->in.padding;
conn->in.offset += conn->in.padding;
- if (conn->datadgst_en &&
- conn->in.opcode != ISCSI_OP_LOGIN_RSP) {
+ if (conn->datadgst_en) {
if (conn->in.padding) {
debug_tcp("padding -> %d\n", conn->in.padding);
memset(pad, 0, conn->in.padding);
@@ -2875,8 +2872,11 @@
* in hdr_extract() and will be re-negotiated at
* set_param() time.
*/
- if (flag == STOP_CONN_RECOVER)
+ if (flag == STOP_CONN_RECOVER) {
conn->hdr_size = sizeof(struct iscsi_hdr);
+ conn->hdrdgst_en = 0;
+ conn->datadgst_en = 0;
+ }
}
up(&conn->xmitsema);
}