diff options
author | Christophe Vu-Brugier <cvubrugier@fastmail.fm> | 2015-04-19 22:18:33 +0200 |
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committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-05-30 22:41:43 -0700 |
commit | c04a6091c951c88636a569cdd29feb65fb5003af (patch) | |
tree | e705fe7ac956a9e8e2ccf7b3f210a8a41363573c /drivers/target/iscsi/iscsi_target_util.c | |
parent | 414e4627277e38e3a557c53c9def7fe9f1ec9b2c (diff) | |
download | linux-c04a6091c951c88636a569cdd29feb65fb5003af.tar.bz2 |
iscsi-target: remove support for obsolete markers
Support for markers is currently broken because of a bug in
iscsi_enforce_integrity_rules(): the "IFMarkInt_Reject" and
"OFMarkInt_Reject" variables are always equal to 1 in
iscsi_enforce_integrity_rules().
Moreover, fixed interval markers keys (IFMarker, OFMarker, IFMarkInt
and OFMarkInt) are obsolete according to iSCSI RFC 7143:
>From http://tools.ietf.org/html/rfc7143#section-13.25:
13.25. Obsoleted Keys
This document obsoletes the following keys defined in [RFC3720]:
IFMarker, OFMarker, OFMarkInt, and IFMarkInt. However, iSCSI
implementations compliant to this document may still receive these
obsoleted keys -- i.e., in a responder role -- in a text negotiation.
When an IFMarker or OFMarker key is received, a compliant iSCSI
implementation SHOULD respond with the constant "Reject" value. The
implementation MAY alternatively respond with a "No" value.
However, the implementation MUST NOT respond with a "NotUnderstood"
value for either of these keys.
When an IFMarkInt or OFMarkInt key is received, a compliant iSCSI
implementation MUST respond with the constant "Reject" value. The
implementation MUST NOT respond with a "NotUnderstood" value for
either of these keys.
This patch disables markers by turning the corresponding parameters to
read-only. The default value of IFMarker and OFMarker remains "No" but
the user cannot change it to "Yes" anymore. The new value of IFMarkInt
and OFMarkInt is "Reject".
(Drop left-over iscsi_get_value_from_number_range + make configfs
parameters attrs R/W nops - nab)
Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi/iscsi_target_util.c')
-rw-r--r-- | drivers/target/iscsi/iscsi_target_util.c | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c index b18edda3e8af..37d23e5e08dc 100644 --- a/drivers/target/iscsi/iscsi_target_util.c +++ b/drivers/target/iscsi/iscsi_target_util.c @@ -809,54 +809,6 @@ void iscsit_inc_session_usage_count(struct iscsi_session *sess) spin_unlock_bh(&sess->session_usage_lock); } -/* - * Setup conn->if_marker and conn->of_marker values based upon - * the initial marker-less interval. (see iSCSI v19 A.2) - */ -int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) -{ - int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; - /* - * IFMarkInt and OFMarkInt are negotiated as 32-bit words. - */ - u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); - u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); - - if (conn->conn_ops->OFMarker) { - /* - * Account for the first Login Command received not - * via iscsi_recv_msg(). - */ - conn->of_marker += ISCSI_HDR_LEN; - if (conn->of_marker <= OFMarkInt) { - conn->of_marker = (OFMarkInt - conn->of_marker); - } else { - login_ofmarker_count = (conn->of_marker / OFMarkInt); - next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + - (login_ofmarker_count * MARKER_SIZE); - conn->of_marker = (next_marker - conn->of_marker); - } - conn->of_marker_offset = 0; - pr_debug("Setting OFMarker value to %u based on Initial" - " Markerless Interval.\n", conn->of_marker); - } - - if (conn->conn_ops->IFMarker) { - if (conn->if_marker <= IFMarkInt) { - conn->if_marker = (IFMarkInt - conn->if_marker); - } else { - login_ifmarker_count = (conn->if_marker / IFMarkInt); - next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + - (login_ifmarker_count * MARKER_SIZE); - conn->if_marker = (next_marker - conn->if_marker); - } - pr_debug("Setting IFMarker value to %u based on Initial" - " Markerless Interval.\n", conn->if_marker); - } - - return 0; -} - struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) { struct iscsi_conn *conn; |