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linux-next/drivers/target/iscsi/iscsi_target_util.h
Christophe Vu-Brugier c04a6091c9 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>
2015-05-30 22:41:43 -07:00

61 lines
3.7 KiB
C

#ifndef ISCSI_TARGET_UTIL_H
#define ISCSI_TARGET_UTIL_H
#define MARKER_SIZE 8
extern int iscsit_add_r2t_to_list(struct iscsi_cmd *, u32, u32, int, u32);
extern struct iscsi_r2t *iscsit_get_r2t_for_eos(struct iscsi_cmd *, u32, u32);
extern struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *);
extern void iscsit_free_r2t(struct iscsi_r2t *, struct iscsi_cmd *);
extern void iscsit_free_r2ts_from_list(struct iscsi_cmd *);
extern struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *, gfp_t);
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, int);
extern struct iscsi_seq *iscsit_get_seq_holder_for_datain(struct iscsi_cmd *, u32);
extern struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *);
extern struct iscsi_r2t *iscsit_get_holder_for_r2tsn(struct iscsi_cmd *, u32);
extern int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
unsigned char * ,__be32 cmdsn);
extern int iscsit_check_unsolicited_dataout(struct iscsi_cmd *, unsigned char *);
extern struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(struct iscsi_conn *,
itt_t, u32);
extern struct iscsi_cmd *iscsit_find_cmd_from_ttt(struct iscsi_conn *, u32);
extern int iscsit_find_cmd_for_recovery(struct iscsi_session *, struct iscsi_cmd **,
struct iscsi_conn_recovery **, itt_t);
extern void iscsit_add_cmd_to_immediate_queue(struct iscsi_cmd *, struct iscsi_conn *, u8);
extern struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *);
extern void iscsit_add_cmd_to_response_queue(struct iscsi_cmd *, struct iscsi_conn *, u8);
extern struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *);
extern void iscsit_remove_cmd_from_tx_queues(struct iscsi_cmd *, struct iscsi_conn *);
extern bool iscsit_conn_all_queues_empty(struct iscsi_conn *);
extern void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *);
extern void iscsit_release_cmd(struct iscsi_cmd *);
extern void __iscsit_free_cmd(struct iscsi_cmd *, bool, bool);
extern void iscsit_free_cmd(struct iscsi_cmd *, bool);
extern int iscsit_check_session_usage_count(struct iscsi_session *);
extern void iscsit_dec_session_usage_count(struct iscsi_session *);
extern void iscsit_inc_session_usage_count(struct iscsi_session *);
extern struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *, u16);
extern struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *, u16);
extern void iscsit_check_conn_usage_count(struct iscsi_conn *);
extern void iscsit_dec_conn_usage_count(struct iscsi_conn *);
extern void iscsit_inc_conn_usage_count(struct iscsi_conn *);
extern void iscsit_mod_nopin_response_timer(struct iscsi_conn *);
extern void iscsit_start_nopin_response_timer(struct iscsi_conn *);
extern void iscsit_stop_nopin_response_timer(struct iscsi_conn *);
extern void __iscsit_start_nopin_timer(struct iscsi_conn *);
extern void iscsit_start_nopin_timer(struct iscsi_conn *);
extern void iscsit_stop_nopin_timer(struct iscsi_conn *);
extern int iscsit_send_tx_data(struct iscsi_cmd *, struct iscsi_conn *, int);
extern int iscsit_fe_sendpage_sg(struct iscsi_cmd *, struct iscsi_conn *);
extern int iscsit_tx_login_rsp(struct iscsi_conn *, u8, u8);
extern void iscsit_print_session_params(struct iscsi_session *);
extern int iscsit_print_dev_to_proc(char *, char **, off_t, int);
extern int iscsit_print_sessions_to_proc(char *, char **, off_t, int);
extern int iscsit_print_tpg_to_proc(char *, char **, off_t, int);
extern int rx_data(struct iscsi_conn *, struct kvec *, int, int);
extern int tx_data(struct iscsi_conn *, struct kvec *, int, int);
extern void iscsit_collect_login_stats(struct iscsi_conn *, u8, u8);
extern struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *);
#endif /*** ISCSI_TARGET_UTIL_H ***/