7aab9c14a4
Don't assume that csio->data_ptr is pointer to a data buffer that can be passed to icl_get_pdu_data and icl_append_data. For unmapped I/O requests, csio->data_ptr is instead a pointer to a struct bio as indicated by CAM_DATA_BIO. To support these requests, add icl_pdu_append_bio and icl_pdu_get_bio methods which pass a pointer to the bio and an offset and length relative to the bio's buffer. Note that only backends supporting unmapped requests need to implement these hooks. Implement simple no-op hooks for the iser backend. Reviewed by: mav Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D34382
159 lines
3.4 KiB
Objective-C
159 lines
3.4 KiB
Objective-C
#-
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2014 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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# $FreeBSD$
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#
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#include <sys/bio.h>
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#include <sys/socket.h>
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#include <dev/iscsi/icl.h>
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INTERFACE icl_conn;
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CODE {
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static void null_pdu_queue_cb(struct icl_conn *ic,
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struct icl_pdu *ip, icl_pdu_cb cb)
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{
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ICL_CONN_PDU_QUEUE(ic, ip);
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if (cb)
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cb(ip, 0);
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}
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};
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METHOD size_t pdu_data_segment_length {
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struct icl_conn *_ic;
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const struct icl_pdu *_ip;
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};
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METHOD int pdu_append_bio {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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struct bio *_bp;
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size_t _offset;
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size_t _len;
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int _flags;
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};
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METHOD int pdu_append_data {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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const void *_addr;
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size_t _len;
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int _flags;
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};
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METHOD void pdu_get_bio {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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size_t _pdu_off;
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struct bio *_bp;
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size_t _bio_off;
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size_t _len;
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};
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METHOD void pdu_get_data {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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size_t _off;
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void *_addr;
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size_t _len;
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};
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METHOD void pdu_queue {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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};
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METHOD void pdu_queue_cb {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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icl_pdu_cb cb;
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} DEFAULT null_pdu_queue_cb;
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METHOD void pdu_free {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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};
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METHOD struct icl_pdu * new_pdu {
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struct icl_conn *_ic;
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int _flags;
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};
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METHOD void free {
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struct icl_conn *_ic;
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};
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METHOD int handoff {
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struct icl_conn *_ic;
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int _fd;
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};
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METHOD void close {
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struct icl_conn *_ic;
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};
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METHOD int task_setup {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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struct ccb_scsiio *_csio;
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uint32_t *_task_tag;
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void **_prvp;
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};
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METHOD void task_done {
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struct icl_conn *_ic;
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void *_prv;
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};
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METHOD int transfer_setup {
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struct icl_conn *_ic;
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struct icl_pdu *_ip;
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union ctl_io *_io;
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uint32_t *_transfer_tag;
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void **_prvp;
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};
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METHOD void transfer_done {
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struct icl_conn *_ic;
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void *_prv;
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};
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#
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# The function below is only used with ICL_KERNEL_PROXY.
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#
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METHOD int connect {
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struct icl_conn *_ic;
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int _domain;
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int _socktype;
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int _protocol;
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struct sockaddr *_from_sa;
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struct sockaddr *_to_sa;
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};
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