2e36f0c10a
Decouple the send and receive limits on the amount of data in a single iSCSI PDU. MaxRecvDataSegmentLength is declarative, not negotiated, and is direction-specific so there is no reason for both ends to limit themselves to the same min(initiator, target) value in both directions. Allow iSCSI drivers to report their send, receive, first burst, and max burst limits explicitly instead of using hardcoded values or trying to derive all of them from the receive limit (which was the only limit reported by the drivers prior to this change). Display the send and receive limits separately in the userspace iSCSI utilities. Reviewed by: jpaetzel@ (earlier version), trasz@ Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D7279
153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
/*-
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* Copyright (c) 2012 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef ISCSID_H
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#define ISCSID_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <iscsi_ioctl.h>
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#define DEFAULT_PIDFILE "/var/run/iscsid.pid"
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#define CONN_DIGEST_NONE 0
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#define CONN_DIGEST_CRC32C 1
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#define CONN_MUTUAL_CHALLENGE_LEN 1024
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#define SOCKBUF_SIZE 1048576
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#define MAX_BURST_LENGTH (256 * 1024)
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#define FIRST_BURST_LENGTH (128 * 1024)
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struct connection {
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int conn_iscsi_fd;
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int conn_socket;
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unsigned int conn_session_id;
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struct iscsi_session_conf conn_conf;
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struct iscsi_session_limits conn_limits;
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char conn_target_alias[ISCSI_ADDR_LEN];
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uint8_t conn_isid[6];
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uint16_t conn_tsih;
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uint32_t conn_statsn;
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int conn_header_digest;
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int conn_data_digest;
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bool conn_initial_r2t;
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bool conn_immediate_data;
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int conn_max_recv_data_segment_length;
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int conn_max_send_data_segment_length;
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int conn_max_burst_length;
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int conn_first_burst_length;
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struct chap *conn_mutual_chap;
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};
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struct pdu {
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struct connection *pdu_connection;
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struct iscsi_bhs *pdu_bhs;
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char *pdu_data;
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size_t pdu_data_len;
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};
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#define KEYS_MAX 1024
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struct keys {
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char *keys_names[KEYS_MAX];
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char *keys_values[KEYS_MAX];
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char *keys_data;
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size_t keys_data_len;
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};
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#define CHAP_CHALLENGE_LEN 1024
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#define CHAP_DIGEST_LEN 16 /* Equal to MD5 digest size. */
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struct chap {
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unsigned char chap_id;
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char chap_challenge[CHAP_CHALLENGE_LEN];
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char chap_response[CHAP_DIGEST_LEN];
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};
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struct rchap {
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char *rchap_secret;
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unsigned char rchap_id;
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void *rchap_challenge;
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size_t rchap_challenge_len;
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};
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struct chap *chap_new(void);
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char *chap_get_id(const struct chap *chap);
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char *chap_get_challenge(const struct chap *chap);
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int chap_receive(struct chap *chap, const char *response);
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int chap_authenticate(struct chap *chap,
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const char *secret);
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void chap_delete(struct chap *chap);
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struct rchap *rchap_new(const char *secret);
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int rchap_receive(struct rchap *rchap,
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const char *id, const char *challenge);
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char *rchap_get_response(struct rchap *rchap);
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void rchap_delete(struct rchap *rchap);
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struct keys *keys_new(void);
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void keys_delete(struct keys *key);
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void keys_load(struct keys *keys, const struct pdu *pdu);
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void keys_save(struct keys *keys, struct pdu *pdu);
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const char *keys_find(struct keys *keys, const char *name);
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void keys_add(struct keys *keys,
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const char *name, const char *value);
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void keys_add_int(struct keys *keys,
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const char *name, int value);
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struct pdu *pdu_new(struct connection *ic);
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struct pdu *pdu_new_response(struct pdu *request);
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void pdu_receive(struct pdu *request);
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void pdu_send(struct pdu *response);
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void pdu_delete(struct pdu *ip);
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void login(struct connection *ic);
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void discovery(struct connection *ic);
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void log_init(int level);
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void log_set_peer_name(const char *name);
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void log_set_peer_addr(const char *addr);
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void log_err(int, const char *, ...)
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__dead2 __printflike(2, 3);
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void log_errx(int, const char *, ...)
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__dead2 __printflike(2, 3);
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void log_warn(const char *, ...) __printflike(1, 2);
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void log_warnx(const char *, ...) __printflike(1, 2);
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void log_debugx(const char *, ...) __printflike(1, 2);
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char *checked_strdup(const char *);
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bool timed_out(void);
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void fail(const struct connection *, const char *);
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#endif /* !ISCSID_H */
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