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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 /drivers/scsi/libiscsi.c | |
| parent | 322d739da83bbff0309c202181f79c08d9534880 (diff) | |
| download | lwn-8b1d03434ee44b08c57f50403eaeab099facebf5.tar.gz lwn-8b1d03434ee44b08c57f50403eaeab099facebf5.zip | |
[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.c | 14 |
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; |