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authorMike Christie <michaelc@cs.wisc.edu>2008-01-31 13:36:53 -0600
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-02-07 18:02:37 -0600
commit8b1d03434ee44b08c57f50403eaeab099facebf5 (patch)
tree48d7c5aeb3b765284dcc3d8685ed6ea6aed350cb /drivers/scsi/libiscsi.c
parent322d739da83bbff0309c202181f79c08d9534880 (diff)
downloadlinux-8b1d03434ee44b08c57f50403eaeab099facebf5.tar.bz2
[SCSI] libiscsi: fix session age rollover and remove cid encoding
The session age mask is only 4 bits, but session->age is 32. When it gets larger then 15 and we try to or the bits some bits get dropped and the check for session age in iscsi_verify_itt is useless. The ISCSI_CID_MASK related bits are also useless since cid is always one. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 10ba76285852..59f8445eab0d 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -160,7 +160,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
hdr->opcode = ISCSI_OP_SCSI_CMD;
hdr->flags = ISCSI_ATTR_SIMPLE;
int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
- hdr->itt = build_itt(ctask->itt, conn->id, session->age);
+ hdr->itt = build_itt(ctask->itt, session->age);
hdr->data_length = cpu_to_be32(scsi_bufflen(sc));
hdr->cmdsn = cpu_to_be32(session->cmdsn);
session->cmdsn++;
@@ -705,14 +705,6 @@ int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
return ISCSI_ERR_BAD_ITT;
}
- if (((__force u32)hdr->itt & ISCSI_CID_MASK) !=
- (conn->id << ISCSI_CID_SHIFT)) {
- iscsi_conn_printk(KERN_ERR, conn,
- "iscsi: received itt %x, expected "
- "CID (%x)\n",
- (__force u32)hdr->itt, conn->id);
- return ISCSI_ERR_BAD_ITT;
- }
itt = get_itt(hdr->itt);
} else
itt = ~0U;
@@ -776,7 +768,7 @@ static void iscsi_prep_mtask(struct iscsi_conn *conn,
*/
nop->cmdsn = cpu_to_be32(session->cmdsn);
if (hdr->itt != RESERVED_ITT) {
- hdr->itt = build_itt(mtask->itt, conn->id, session->age);
+ hdr->itt = build_itt(mtask->itt, session->age);
/*
* TODO: We always use immediate, so we never hit this.
* If we start to send tmfs or nops as non-immediate then
@@ -2036,6 +2028,8 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
conn->stop_stage = 0;
conn->tmf_state = TMF_INITIAL;
session->age++;
+ if (session->age == 16)
+ session->age = 0;
break;
case STOP_CONN_TERM:
conn->stop_stage = 0;