Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8b1d03434ee44b08c57f50403eaeab099facebf5
Commit:     8b1d03434ee44b08c57f50403eaeab099facebf5
Parent:     322d739da83bbff0309c202181f79c08d9534880
Author:     Mike Christie <[EMAIL PROTECTED]>
AuthorDate: Thu Jan 31 13:36:53 2008 -0600
Committer:  James Bottomley <[EMAIL PROTECTED]>
CommitDate: Thu Feb 7 18:02:37 2008 -0600

    [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 <[EMAIL PROTECTED]>
    Signed-off-by: James Bottomley <[EMAIL PROTECTED]>
---
 drivers/scsi/libiscsi.c    |   14 ++++----------
 include/scsi/iscsi_proto.h |    4 ++--
 include/scsi/libiscsi.h    |    2 --
 3 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 10ba762..59f8445 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;
diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
index 318a909..5ffec8a 100644
--- a/include/scsi/iscsi_proto.h
+++ b/include/scsi/iscsi_proto.h
@@ -45,8 +45,8 @@
 /* initiator tags; opaque for target */
 typedef uint32_t __bitwise__ itt_t;
 /* below makes sense only for initiator that created this tag */
-#define build_itt(itt, id, age) ((__force itt_t)\
-       ((itt) | ((id) << ISCSI_CID_SHIFT) | ((age) << ISCSI_AGE_SHIFT)))
+#define build_itt(itt, age) ((__force itt_t)\
+       ((itt) | ((age) << ISCSI_AGE_SHIFT)))
 #define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK)
 #define RESERVED_ITT ((__force itt_t)0xffffffff)
 
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 5784e4f..7b90b63 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -70,8 +70,6 @@ enum {
 #define ISCSI_SUSPEND_BIT              1
 
 #define ISCSI_ITT_MASK                 (0xfff)
-#define ISCSI_CID_SHIFT                        12
-#define ISCSI_CID_MASK                 (0xffff << ISCSI_CID_SHIFT)
 #define ISCSI_AGE_SHIFT                        28
 #define ISCSI_AGE_MASK                 (0xf << ISCSI_AGE_SHIFT)
 
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