7b02c1e8c6
cxgbei needs the ability to return different limits based on the connection (e.g. if the connection is over a T5 adapter or a T6 adapter as well as factoring in the MTU). This change plumbs through the changes in the ioctls without changing any of the backends. The limits callback passed to icl_register now accepts a second socket argument which holds the integer file descriptor. To support ABI compatiblity for old binaries, the callback should return "global" values if the socket fd is zero. The CTL_ISCSI_LIMITS argument used with CTL_ISCSI by ctld(8) now accepts the socket fd in a field that was previously part of a reserved spare field. Old binaries zero this request which results in passing a socket fd of 0 to the limits callback. The ISCSIDREQUEST ioctl no longer returns limits. Instead, iscsid(8) invokes a new ISCSIDLIMITS ioctl after establishing the connection via connect(2). For ABI compat, if the old ISCSIDREQUEST is invoked, the global limits are still fetched (with a socket fd of 0) and returned. Reviewed by: mav Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D34928
173 lines
5.0 KiB
C
173 lines
5.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2012 The FreeBSD Foundation
|
|
*
|
|
* This software was developed by Edward Tomasz Napierala under sponsorship
|
|
* from the FreeBSD Foundation.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef ICL_H
|
|
#define ICL_H
|
|
|
|
/*
|
|
* iSCSI Common Layer. It's used by both the initiator and target to send
|
|
* and receive iSCSI PDUs.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/kobj.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
SYSCTL_DECL(_kern_icl);
|
|
|
|
extern int icl_debug;
|
|
|
|
#define ICL_DEBUG(X, ...) \
|
|
do { \
|
|
if (icl_debug > 1) \
|
|
printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
|
|
} while (0)
|
|
|
|
#define ICL_WARN(X, ...) \
|
|
do { \
|
|
if (icl_debug > 0) { \
|
|
printf("WARNING: %s: " X "\n", \
|
|
__func__, ## __VA_ARGS__); \
|
|
} \
|
|
} while (0)
|
|
|
|
struct icl_conn;
|
|
struct ccb_scsiio;
|
|
union ctl_io;
|
|
|
|
struct icl_pdu {
|
|
STAILQ_ENTRY(icl_pdu) ip_next;
|
|
struct icl_conn *ip_conn;
|
|
struct iscsi_bhs *ip_bhs;
|
|
struct mbuf *ip_bhs_mbuf;
|
|
size_t ip_ahs_len;
|
|
struct mbuf *ip_ahs_mbuf;
|
|
size_t ip_data_len;
|
|
struct mbuf *ip_data_mbuf;
|
|
|
|
/*
|
|
* When a "large" received PDU represents multiple on-the-wire
|
|
* PDUs, this is the count of additional on-the-wire PDUs.
|
|
* For PDUs that match on-the-wire PDUs, this should be set to
|
|
* zero.
|
|
*/
|
|
u_int ip_additional_pdus;
|
|
|
|
/*
|
|
* User (initiator or provider) private fields.
|
|
*/
|
|
void *ip_prv0;
|
|
void *ip_prv1;
|
|
};
|
|
|
|
#define ICL_NOCOPY (1 << 30)
|
|
|
|
struct icl_conn {
|
|
KOBJ_FIELDS;
|
|
struct mtx *ic_lock;
|
|
struct socket *ic_socket;
|
|
#ifdef DIAGNOSTIC
|
|
volatile u_int ic_outstanding_pdus;
|
|
#endif
|
|
uint32_t ic_max_recv_data_segment_length;
|
|
uint32_t ic_max_send_data_segment_length;
|
|
size_t ic_hw_isomax;
|
|
size_t ic_maxtags;
|
|
bool ic_header_crc32c;
|
|
bool ic_data_crc32c;
|
|
bool ic_disconnecting;
|
|
bool ic_iser;
|
|
bool ic_unmapped;
|
|
const char *ic_name;
|
|
const char *ic_offload;
|
|
|
|
void (*ic_receive)(struct icl_pdu *);
|
|
void (*ic_error)(struct icl_conn *);
|
|
|
|
/*
|
|
* User (initiator or provider) private fields.
|
|
*/
|
|
void *ic_prv0;
|
|
};
|
|
|
|
#define ICL_CONN_LOCK(X) mtx_lock(X->ic_lock)
|
|
#define ICL_CONN_UNLOCK(X) mtx_unlock(X->ic_lock)
|
|
#define ICL_CONN_LOCK_ASSERT(X) mtx_assert(X->ic_lock, MA_OWNED)
|
|
#define ICL_CONN_LOCK_ASSERT_NOT(X) mtx_assert(X->ic_lock, MA_NOTOWNED)
|
|
|
|
struct icl_drv_limits {
|
|
int idl_max_recv_data_segment_length;
|
|
int idl_max_send_data_segment_length;
|
|
int idl_max_burst_length;
|
|
int idl_first_burst_length;
|
|
int spare[4];
|
|
};
|
|
|
|
typedef void (*icl_pdu_cb)(struct icl_pdu *, int error);
|
|
|
|
struct icl_conn *icl_new_conn(const char *offload, bool iser, const char *name,
|
|
struct mtx *lock);
|
|
int icl_limits(const char *offload, bool iser, int socket,
|
|
struct icl_drv_limits *idl);
|
|
int icl_register(const char *offload, bool iser, int priority,
|
|
int (*limits)(struct icl_drv_limits *, int),
|
|
struct icl_conn *(*new_conn)(const char *, struct mtx *));
|
|
int icl_unregister(const char *offload, bool rdma);
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
|
|
|
struct sockaddr;
|
|
struct icl_listen;
|
|
|
|
/*
|
|
* Target part.
|
|
*/
|
|
struct icl_listen *icl_listen_new(void (*accept_cb)(struct socket *,
|
|
struct sockaddr *, int));
|
|
void icl_listen_free(struct icl_listen *il);
|
|
int icl_listen_add(struct icl_listen *il, bool rdma,
|
|
int domain, int socktype, int protocol,
|
|
struct sockaddr *sa, int portal_id);
|
|
int icl_listen_remove(struct icl_listen *il, struct sockaddr *sa);
|
|
|
|
/*
|
|
* Those two are not a public API; only to be used between icl_soft.c
|
|
* and icl_soft_proxy.c.
|
|
*/
|
|
int icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so);
|
|
int icl_soft_proxy_connect(struct icl_conn *ic, int domain,
|
|
int socktype, int protocol, struct sockaddr *from_sa,
|
|
struct sockaddr *to_sa);
|
|
#endif /* ICL_KERNEL_PROXY */
|
|
#endif /* !ICL_H */
|