1*009ea47eSEdward Tomasz Napierala /*- 2*009ea47eSEdward Tomasz Napierala * Copyright (c) 2012 The FreeBSD Foundation 3*009ea47eSEdward Tomasz Napierala * All rights reserved. 4*009ea47eSEdward Tomasz Napierala * 5*009ea47eSEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 6*009ea47eSEdward Tomasz Napierala * from the FreeBSD Foundation. 7*009ea47eSEdward Tomasz Napierala * 8*009ea47eSEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 9*009ea47eSEdward Tomasz Napierala * modification, are permitted provided that the following conditions 10*009ea47eSEdward Tomasz Napierala * are met: 11*009ea47eSEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 12*009ea47eSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 13*009ea47eSEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 14*009ea47eSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 15*009ea47eSEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 16*009ea47eSEdward Tomasz Napierala * 17*009ea47eSEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18*009ea47eSEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*009ea47eSEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*009ea47eSEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21*009ea47eSEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*009ea47eSEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*009ea47eSEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*009ea47eSEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*009ea47eSEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*009ea47eSEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*009ea47eSEdward Tomasz Napierala * SUCH DAMAGE. 28*009ea47eSEdward Tomasz Napierala * 29*009ea47eSEdward Tomasz Napierala * $FreeBSD$ 30*009ea47eSEdward Tomasz Napierala */ 31*009ea47eSEdward Tomasz Napierala 32*009ea47eSEdward Tomasz Napierala #ifndef ICL_H 33*009ea47eSEdward Tomasz Napierala #define ICL_H 34*009ea47eSEdward Tomasz Napierala 35*009ea47eSEdward Tomasz Napierala /* 36*009ea47eSEdward Tomasz Napierala * iSCSI Common Layer. It's used by both the initiator and target to send 37*009ea47eSEdward Tomasz Napierala * and receive iSCSI PDUs. 38*009ea47eSEdward Tomasz Napierala */ 39*009ea47eSEdward Tomasz Napierala 40*009ea47eSEdward Tomasz Napierala struct icl_conn; 41*009ea47eSEdward Tomasz Napierala 42*009ea47eSEdward Tomasz Napierala struct icl_pdu { 43*009ea47eSEdward Tomasz Napierala TAILQ_ENTRY(icl_pdu) ip_next; 44*009ea47eSEdward Tomasz Napierala struct icl_conn *ip_conn; 45*009ea47eSEdward Tomasz Napierala struct iscsi_bhs *ip_bhs; 46*009ea47eSEdward Tomasz Napierala struct mbuf *ip_bhs_mbuf; 47*009ea47eSEdward Tomasz Napierala size_t ip_ahs_len; 48*009ea47eSEdward Tomasz Napierala struct mbuf *ip_ahs_mbuf; 49*009ea47eSEdward Tomasz Napierala size_t ip_data_len; 50*009ea47eSEdward Tomasz Napierala struct mbuf *ip_data_mbuf; 51*009ea47eSEdward Tomasz Napierala 52*009ea47eSEdward Tomasz Napierala /* 53*009ea47eSEdward Tomasz Napierala * User (initiator or provider) private fields. 54*009ea47eSEdward Tomasz Napierala */ 55*009ea47eSEdward Tomasz Napierala uint32_t ip_prv0; 56*009ea47eSEdward Tomasz Napierala uint32_t ip_prv1; 57*009ea47eSEdward Tomasz Napierala uint32_t ip_prv2; 58*009ea47eSEdward Tomasz Napierala }; 59*009ea47eSEdward Tomasz Napierala 60*009ea47eSEdward Tomasz Napierala struct icl_pdu *icl_pdu_new_bhs(struct icl_conn *ic, int flags); 61*009ea47eSEdward Tomasz Napierala size_t icl_pdu_data_segment_length(const struct icl_pdu *ip); 62*009ea47eSEdward Tomasz Napierala int icl_pdu_append_data(struct icl_pdu *ip, const void *addr, size_t len, int flags); 63*009ea47eSEdward Tomasz Napierala void icl_pdu_get_data(struct icl_pdu *ip, size_t off, void *addr, size_t len); 64*009ea47eSEdward Tomasz Napierala void icl_pdu_queue(struct icl_pdu *ip); 65*009ea47eSEdward Tomasz Napierala void icl_pdu_free(struct icl_pdu *ip); 66*009ea47eSEdward Tomasz Napierala 67*009ea47eSEdward Tomasz Napierala #define ICL_CONN_STATE_INVALID 0 68*009ea47eSEdward Tomasz Napierala #define ICL_CONN_STATE_BHS 1 69*009ea47eSEdward Tomasz Napierala #define ICL_CONN_STATE_AHS 2 70*009ea47eSEdward Tomasz Napierala #define ICL_CONN_STATE_HEADER_DIGEST 3 71*009ea47eSEdward Tomasz Napierala #define ICL_CONN_STATE_DATA 4 72*009ea47eSEdward Tomasz Napierala #define ICL_CONN_STATE_DATA_DIGEST 5 73*009ea47eSEdward Tomasz Napierala 74*009ea47eSEdward Tomasz Napierala #define ICL_MAX_DATA_SEGMENT_LENGTH (128 * 1024) 75*009ea47eSEdward Tomasz Napierala 76*009ea47eSEdward Tomasz Napierala struct icl_conn { 77*009ea47eSEdward Tomasz Napierala struct mtx ic_lock; 78*009ea47eSEdward Tomasz Napierala struct socket *ic_socket; 79*009ea47eSEdward Tomasz Napierala volatile u_int ic_outstanding_pdus; 80*009ea47eSEdward Tomasz Napierala TAILQ_HEAD(, icl_pdu) ic_to_send; 81*009ea47eSEdward Tomasz Napierala size_t ic_receive_len; 82*009ea47eSEdward Tomasz Napierala int ic_receive_state; 83*009ea47eSEdward Tomasz Napierala struct icl_pdu *ic_receive_pdu; 84*009ea47eSEdward Tomasz Napierala struct cv ic_send_cv; 85*009ea47eSEdward Tomasz Napierala struct cv ic_receive_cv; 86*009ea47eSEdward Tomasz Napierala bool ic_header_crc32c; 87*009ea47eSEdward Tomasz Napierala bool ic_data_crc32c; 88*009ea47eSEdward Tomasz Napierala bool ic_send_running; 89*009ea47eSEdward Tomasz Napierala bool ic_receive_running; 90*009ea47eSEdward Tomasz Napierala size_t ic_max_data_segment_length; 91*009ea47eSEdward Tomasz Napierala bool ic_disconnecting; 92*009ea47eSEdward Tomasz Napierala bool ic_iser; 93*009ea47eSEdward Tomasz Napierala 94*009ea47eSEdward Tomasz Napierala void (*ic_receive)(struct icl_pdu *); 95*009ea47eSEdward Tomasz Napierala void (*ic_error)(struct icl_conn *); 96*009ea47eSEdward Tomasz Napierala 97*009ea47eSEdward Tomasz Napierala /* 98*009ea47eSEdward Tomasz Napierala * User (initiator or provider) private fields. 99*009ea47eSEdward Tomasz Napierala */ 100*009ea47eSEdward Tomasz Napierala void *ic_prv0; 101*009ea47eSEdward Tomasz Napierala }; 102*009ea47eSEdward Tomasz Napierala 103*009ea47eSEdward Tomasz Napierala struct icl_conn *icl_conn_new(void); 104*009ea47eSEdward Tomasz Napierala void icl_conn_free(struct icl_conn *ic); 105*009ea47eSEdward Tomasz Napierala int icl_conn_handoff(struct icl_conn *ic, int fd); 106*009ea47eSEdward Tomasz Napierala void icl_conn_shutdown(struct icl_conn *ic); 107*009ea47eSEdward Tomasz Napierala void icl_conn_close(struct icl_conn *ic); 108*009ea47eSEdward Tomasz Napierala bool icl_conn_connected(struct icl_conn *ic); 109*009ea47eSEdward Tomasz Napierala 110*009ea47eSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 111*009ea47eSEdward Tomasz Napierala 112*009ea47eSEdward Tomasz Napierala struct sockaddr; 113*009ea47eSEdward Tomasz Napierala struct icl_listen; 114*009ea47eSEdward Tomasz Napierala 115*009ea47eSEdward Tomasz Napierala struct icl_listen_sock { 116*009ea47eSEdward Tomasz Napierala TAILQ_ENTRY(icl_listen_sock) ils_next; 117*009ea47eSEdward Tomasz Napierala struct icl_listen *ils_listen; 118*009ea47eSEdward Tomasz Napierala struct socket *ils_socket; 119*009ea47eSEdward Tomasz Napierala bool ils_running; 120*009ea47eSEdward Tomasz Napierala bool ils_disconnecting; 121*009ea47eSEdward Tomasz Napierala }; 122*009ea47eSEdward Tomasz Napierala 123*009ea47eSEdward Tomasz Napierala struct icl_listen { 124*009ea47eSEdward Tomasz Napierala TAILQ_HEAD(, icl_listen_sock) il_sockets; 125*009ea47eSEdward Tomasz Napierala struct sx il_lock; 126*009ea47eSEdward Tomasz Napierala void (*il_accept)(struct socket *); 127*009ea47eSEdward Tomasz Napierala }; 128*009ea47eSEdward Tomasz Napierala 129*009ea47eSEdward Tomasz Napierala /* 130*009ea47eSEdward Tomasz Napierala * Initiator part. 131*009ea47eSEdward Tomasz Napierala */ 132*009ea47eSEdward Tomasz Napierala int icl_conn_connect(struct icl_conn *ic, bool rdma, 133*009ea47eSEdward Tomasz Napierala int domain, int socktype, int protocol, 134*009ea47eSEdward Tomasz Napierala struct sockaddr *from_sa, struct sockaddr *to_sa); 135*009ea47eSEdward Tomasz Napierala /* 136*009ea47eSEdward Tomasz Napierala * Target part. 137*009ea47eSEdward Tomasz Napierala */ 138*009ea47eSEdward Tomasz Napierala struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *)); 139*009ea47eSEdward Tomasz Napierala void icl_listen_free(struct icl_listen *il); 140*009ea47eSEdward Tomasz Napierala int icl_listen_add(struct icl_listen *il, bool rdma, int domain, 141*009ea47eSEdward Tomasz Napierala int socktype, int protocol, struct sockaddr *sa); 142*009ea47eSEdward Tomasz Napierala int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa); 143*009ea47eSEdward Tomasz Napierala 144*009ea47eSEdward Tomasz Napierala /* 145*009ea47eSEdward Tomasz Napierala * This one is not a public API; only to be used by icl_proxy.c. 146*009ea47eSEdward Tomasz Napierala */ 147*009ea47eSEdward Tomasz Napierala int icl_conn_handoff_sock(struct icl_conn *ic, struct socket *so); 148*009ea47eSEdward Tomasz Napierala 149*009ea47eSEdward Tomasz Napierala #endif /* ICL_KERNEL_PROXY */ 150*009ea47eSEdward Tomasz Napierala 151*009ea47eSEdward Tomasz Napierala #endif /* !ICL_H */ 152