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| author | Mike Christie <michaelc@cs.wisc.edu> | 2008-01-31 13:36:53 -0600 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-02-07 18:02:37 -0600 |
| commit | 8b1d03434ee44b08c57f50403eaeab099facebf5 (patch) | |
| tree | 48d7c5aeb3b765284dcc3d8685ed6ea6aed350cb | |
| parent | 322d739da83bbff0309c202181f79c08d9534880 (diff) | |
| download | op-kernel-dev-8b1d03434ee44b08c57f50403eaeab099facebf5.zip op-kernel-dev-8b1d03434ee44b08c57f50403eaeab099facebf5.tar.gz | |
[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>
| -rw-r--r-- | drivers/scsi/libiscsi.c | 14 | ||||
| -rw-r--r-- | include/scsi/iscsi_proto.h | 4 | ||||
| -rw-r--r-- | 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) |
