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171 lines
5 KiB
C
171 lines
5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2012 The FreeBSD Foundation
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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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#ifndef ICL_H
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#define ICL_H
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/*
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* iSCSI Common Layer. It's used by both the initiator and target to send
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* and receive iSCSI PDUs.
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*/
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#include <sys/types.h>
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#include <sys/kobj.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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SYSCTL_DECL(_kern_icl);
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extern int icl_debug;
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#define ICL_DEBUG(X, ...) \
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do { \
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if (icl_debug > 1) \
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printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
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} while (0)
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#define ICL_WARN(X, ...) \
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do { \
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if (icl_debug > 0) { \
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printf("WARNING: %s: " X "\n", \
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__func__, ## __VA_ARGS__); \
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} \
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} while (0)
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struct icl_conn;
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struct ccb_scsiio;
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union ctl_io;
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struct icl_pdu {
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STAILQ_ENTRY(icl_pdu) ip_next;
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struct icl_conn *ip_conn;
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struct iscsi_bhs *ip_bhs;
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struct mbuf *ip_bhs_mbuf;
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size_t ip_ahs_len;
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struct mbuf *ip_ahs_mbuf;
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size_t ip_data_len;
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struct mbuf *ip_data_mbuf;
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/*
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* When a "large" received PDU represents multiple on-the-wire
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* PDUs, this is the count of additional on-the-wire PDUs.
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* For PDUs that match on-the-wire PDUs, this should be set to
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* zero.
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*/
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u_int ip_additional_pdus;
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/*
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* User (initiator or provider) private fields.
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*/
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void *ip_prv0;
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void *ip_prv1;
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};
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#define ICL_NOCOPY (1 << 30)
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struct icl_conn {
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KOBJ_FIELDS;
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struct mtx *ic_lock;
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struct socket *ic_socket;
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#ifdef DIAGNOSTIC
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volatile u_int ic_outstanding_pdus;
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#endif
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uint32_t ic_max_recv_data_segment_length;
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uint32_t ic_max_send_data_segment_length;
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size_t ic_hw_isomax;
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size_t ic_maxtags;
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bool ic_header_crc32c;
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bool ic_data_crc32c;
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bool ic_disconnecting;
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bool ic_iser;
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bool ic_unmapped;
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const char *ic_name;
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const char *ic_offload;
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void (*ic_receive)(struct icl_pdu *);
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void (*ic_error)(struct icl_conn *);
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/*
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* User (initiator or provider) private fields.
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*/
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void *ic_prv0;
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};
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#define ICL_CONN_LOCK(X) mtx_lock(X->ic_lock)
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#define ICL_CONN_UNLOCK(X) mtx_unlock(X->ic_lock)
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#define ICL_CONN_LOCK_ASSERT(X) mtx_assert(X->ic_lock, MA_OWNED)
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#define ICL_CONN_LOCK_ASSERT_NOT(X) mtx_assert(X->ic_lock, MA_NOTOWNED)
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struct icl_drv_limits {
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int idl_max_recv_data_segment_length;
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int idl_max_send_data_segment_length;
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int idl_max_burst_length;
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int idl_first_burst_length;
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int spare[4];
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};
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typedef void (*icl_pdu_cb)(struct icl_pdu *, int error);
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struct icl_conn *icl_new_conn(const char *offload, bool iser, const char *name,
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struct mtx *lock);
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int icl_limits(const char *offload, bool iser, int socket,
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struct icl_drv_limits *idl);
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int icl_register(const char *offload, bool iser, int priority,
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int (*limits)(struct icl_drv_limits *, int),
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struct icl_conn *(*new_conn)(const char *, struct mtx *));
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int icl_unregister(const char *offload, bool rdma);
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#ifdef ICL_KERNEL_PROXY
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struct sockaddr;
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struct icl_listen;
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/*
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* Target part.
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*/
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struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *,
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struct sockaddr *, int));
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void icl_listen_free(struct icl_listen *il);
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int icl_listen_add(struct icl_listen *il, bool rdma,
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int domain, int socktype, int protocol,
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struct sockaddr *sa, int portal_id);
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int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa);
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/*
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* Those two are not a public API; only to be used between icl_soft.c
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* and icl_soft_proxy.c.
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*/
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int icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so);
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int icl_soft_proxy_connect(struct icl_conn *ic, int domain,
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int socktype, int protocol, struct sockaddr *from_sa,
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struct sockaddr *to_sa);
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#endif /* ICL_KERNEL_PROXY */
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#endif /* !ICL_H */
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