2832 lines
74 KiB
C
2832 lines
74 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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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/condvar.h>
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#include <sys/conf.h>
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#include <sys/endian.h>
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#include <sys/eventhandler.h>
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#include <sys/file.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/module.h>
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#include <sys/socket.h>
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#include <sys/sockopt.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/sx.h>
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#include <vm/uma.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_xpt.h>
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#include <cam/cam_debug.h>
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#include <cam/cam_sim.h>
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#include <cam/cam_xpt_sim.h>
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#include <cam/cam_xpt_periph.h>
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#include <cam/cam_periph.h>
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#include <cam/scsi/scsi_all.h>
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#include <cam/scsi/scsi_message.h>
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#include <dev/iscsi/icl.h>
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#include <dev/iscsi/icl_wrappers.h>
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#include <dev/iscsi/iscsi_ioctl.h>
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#include <dev/iscsi/iscsi_proto.h>
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#include <dev/iscsi/iscsi.h>
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#ifdef ICL_KERNEL_PROXY
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#include <sys/socketvar.h>
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#endif
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#ifdef ICL_KERNEL_PROXY
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FEATURE(iscsi_kernel_proxy, "iSCSI initiator built with ICL_KERNEL_PROXY");
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#endif
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#ifdef COMPAT_FREEBSD13
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struct iscsi_daemon_request13 {
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unsigned int idr_session_id;
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struct iscsi_session_conf idr_conf;
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uint8_t idr_isid[6];
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uint16_t idr_tsih;
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uint16_t idr_spare_cid;
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struct iscsi_session_limits idr_limits;
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int idr_spare[4];
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};
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#define ISCSIDWAIT13 _IOR('I', 0x01, struct iscsi_daemon_request13)
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#endif
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/*
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* XXX: This is global so the iscsi_unload() can access it.
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* Think about how to do this properly.
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*/
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static struct iscsi_softc *sc;
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SYSCTL_NODE(_kern, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
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"iSCSI initiator");
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static int debug = 1;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN,
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&debug, 0, "Enable debug messages");
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static int ping_timeout = 5;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, &ping_timeout,
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0, "Timeout for ping (NOP-Out) requests, in seconds");
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static int iscsid_timeout = 60;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, iscsid_timeout, CTLFLAG_RWTUN, &iscsid_timeout,
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0, "Time to wait for iscsid(8) to handle reconnection, in seconds");
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static int login_timeout = 60;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, &login_timeout,
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0, "Time to wait for iscsid(8) to finish Login Phase, in seconds");
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static int maxtags = 255;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, &maxtags,
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0, "Max number of IO requests queued");
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static int fail_on_disconnection = 0;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, fail_on_disconnection, CTLFLAG_RWTUN,
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&fail_on_disconnection, 0, "Destroy CAM SIM on connection failure");
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static int fail_on_shutdown = 1;
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SYSCTL_INT(_kern_iscsi, OID_AUTO, fail_on_shutdown, CTLFLAG_RWTUN,
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&fail_on_shutdown, 0, "Fail disconnected sessions on shutdown");
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static MALLOC_DEFINE(M_ISCSI, "iSCSI", "iSCSI initiator");
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static uma_zone_t iscsi_outstanding_zone;
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#define CONN_SESSION(X) ((struct iscsi_session *)X->ic_prv0)
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#define PDU_SESSION(X) (CONN_SESSION(X->ip_conn))
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#define ISCSI_DEBUG(X, ...) \
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do { \
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if (debug > 1) \
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printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
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} while (0)
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#define ISCSI_WARN(X, ...) \
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do { \
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if (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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#define ISCSI_SESSION_DEBUG(S, X, ...) \
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do { \
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if (debug > 1) { \
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printf("%s: %s (%s): " X "\n", \
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__func__, S->is_conf.isc_target_addr, \
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S->is_conf.isc_target, ## __VA_ARGS__); \
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} \
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} while (0)
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#define ISCSI_SESSION_WARN(S, X, ...) \
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do { \
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if (debug > 0) { \
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printf("WARNING: %s (%s): " X "\n", \
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S->is_conf.isc_target_addr, \
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S->is_conf.isc_target, ## __VA_ARGS__); \
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} \
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} while (0)
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#define ISCSI_SESSION_LOCK(X) mtx_lock(&X->is_lock)
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#define ISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->is_lock)
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#define ISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->is_lock, MA_OWNED)
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#define ISCSI_SESSION_LOCK_ASSERT_NOT(X) mtx_assert(&X->is_lock, MA_NOTOWNED)
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static int iscsi_ioctl(struct cdev *dev, u_long cmd, caddr_t arg,
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int mode, struct thread *td);
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static struct cdevsw iscsi_cdevsw = {
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.d_version = D_VERSION,
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.d_ioctl = iscsi_ioctl,
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.d_name = "iscsi",
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};
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static void iscsi_pdu_queue_locked(struct icl_pdu *request);
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static void iscsi_pdu_queue(struct icl_pdu *request);
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static void iscsi_pdu_update_statsn(const struct icl_pdu *response);
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static void iscsi_pdu_handle_nop_in(struct icl_pdu *response);
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static void iscsi_pdu_handle_scsi_response(struct icl_pdu *response);
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static void iscsi_pdu_handle_task_response(struct icl_pdu *response);
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static void iscsi_pdu_handle_data_in(struct icl_pdu *response);
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static void iscsi_pdu_handle_logout_response(struct icl_pdu *response);
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static void iscsi_pdu_handle_r2t(struct icl_pdu *response);
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static void iscsi_pdu_handle_async_message(struct icl_pdu *response);
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static void iscsi_pdu_handle_reject(struct icl_pdu *response);
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static void iscsi_session_reconnect(struct iscsi_session *is);
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static void iscsi_session_terminate(struct iscsi_session *is);
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static void iscsi_action(struct cam_sim *sim, union ccb *ccb);
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static struct iscsi_outstanding *iscsi_outstanding_find(struct iscsi_session *is,
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uint32_t initiator_task_tag);
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static struct iscsi_outstanding *iscsi_outstanding_add(struct iscsi_session *is,
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struct icl_pdu *request, union ccb *ccb,
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uint32_t *initiator_task_tagp);
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static void iscsi_outstanding_remove(struct iscsi_session *is,
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struct iscsi_outstanding *io);
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static bool
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iscsi_pdu_prepare(struct icl_pdu *request)
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{
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struct iscsi_session *is;
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struct iscsi_bhs_scsi_command *bhssc;
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is = PDU_SESSION(request);
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ISCSI_SESSION_LOCK_ASSERT(is);
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/*
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* We're only using fields common for all the request
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* (initiator -> target) PDUs.
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*/
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bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
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/*
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* Data-Out PDU does not contain CmdSN.
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*/
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if (bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_OUT) {
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if (ISCSI_SNGT(is->is_cmdsn, is->is_maxcmdsn) &&
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(bhssc->bhssc_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) {
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/*
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* Current MaxCmdSN prevents us from sending any more
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* SCSI Command PDUs to the target; postpone the PDU.
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* It will get resent by either iscsi_pdu_queue(),
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* or by maintenance thread.
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*/
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#if 0
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ISCSI_SESSION_DEBUG(is, "postponing send, CmdSN %u, "
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"ExpCmdSN %u, MaxCmdSN %u, opcode 0x%x",
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is->is_cmdsn, is->is_expcmdsn, is->is_maxcmdsn,
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bhssc->bhssc_opcode);
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#endif
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return (true);
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}
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bhssc->bhssc_cmdsn = htonl(is->is_cmdsn);
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if ((bhssc->bhssc_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0)
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is->is_cmdsn++;
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}
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bhssc->bhssc_expstatsn = htonl(is->is_statsn + 1);
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return (false);
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}
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static void
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iscsi_session_send_postponed(struct iscsi_session *is)
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{
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struct icl_pdu *request;
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bool postpone;
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ISCSI_SESSION_LOCK_ASSERT(is);
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if (STAILQ_EMPTY(&is->is_postponed))
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return;
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while ((request = STAILQ_FIRST(&is->is_postponed)) != NULL) {
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postpone = iscsi_pdu_prepare(request);
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if (postpone)
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return;
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STAILQ_REMOVE_HEAD(&is->is_postponed, ip_next);
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icl_pdu_queue(request);
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}
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xpt_release_simq(is->is_sim, 1);
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}
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static void
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iscsi_pdu_queue_locked(struct icl_pdu *request)
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{
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struct iscsi_session *is;
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bool postpone;
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is = PDU_SESSION(request);
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ISCSI_SESSION_LOCK_ASSERT(is);
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iscsi_session_send_postponed(is);
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postpone = iscsi_pdu_prepare(request);
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if (postpone) {
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if (STAILQ_EMPTY(&is->is_postponed))
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xpt_freeze_simq(is->is_sim, 1);
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STAILQ_INSERT_TAIL(&is->is_postponed, request, ip_next);
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return;
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}
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icl_pdu_queue(request);
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}
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static void
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iscsi_pdu_queue(struct icl_pdu *request)
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{
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struct iscsi_session *is;
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is = PDU_SESSION(request);
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ISCSI_SESSION_LOCK(is);
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iscsi_pdu_queue_locked(request);
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ISCSI_SESSION_UNLOCK(is);
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}
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static void
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iscsi_session_logout(struct iscsi_session *is)
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{
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struct icl_pdu *request;
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struct iscsi_bhs_logout_request *bhslr;
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request = icl_pdu_new(is->is_conn, M_NOWAIT);
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if (request == NULL)
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return;
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bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs;
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bhslr->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_REQUEST;
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bhslr->bhslr_reason = BHSLR_REASON_CLOSE_SESSION;
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iscsi_pdu_queue_locked(request);
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}
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static void
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iscsi_session_terminate_task(struct iscsi_session *is,
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struct iscsi_outstanding *io, cam_status status)
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{
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ISCSI_SESSION_LOCK_ASSERT(is);
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if (io->io_ccb != NULL) {
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io->io_ccb->ccb_h.status &= ~(CAM_SIM_QUEUED | CAM_STATUS_MASK);
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io->io_ccb->ccb_h.status |= status;
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if ((io->io_ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
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io->io_ccb->ccb_h.status |= CAM_DEV_QFRZN;
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xpt_freeze_devq(io->io_ccb->ccb_h.path, 1);
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ISCSI_SESSION_DEBUG(is, "freezing devq");
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}
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xpt_done(io->io_ccb);
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}
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iscsi_outstanding_remove(is, io);
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}
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static void
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iscsi_session_terminate_tasks(struct iscsi_session *is, cam_status status)
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{
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struct iscsi_outstanding *io, *tmp;
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ISCSI_SESSION_LOCK_ASSERT(is);
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TAILQ_FOREACH_SAFE(io, &is->is_outstanding, io_next, tmp) {
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iscsi_session_terminate_task(is, io, status);
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}
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}
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static void
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iscsi_session_cleanup(struct iscsi_session *is, bool destroy_sim)
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{
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struct icl_pdu *pdu;
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ISCSI_SESSION_LOCK_ASSERT(is);
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/*
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* Don't queue any new PDUs.
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*/
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if (is->is_sim != NULL && is->is_simq_frozen == false) {
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ISCSI_SESSION_DEBUG(is, "freezing");
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xpt_freeze_simq(is->is_sim, 1);
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is->is_simq_frozen = true;
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}
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/*
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* Remove postponed PDUs.
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*/
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if (!STAILQ_EMPTY(&is->is_postponed))
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xpt_release_simq(is->is_sim, 1);
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while ((pdu = STAILQ_FIRST(&is->is_postponed)) != NULL) {
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STAILQ_REMOVE_HEAD(&is->is_postponed, ip_next);
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icl_pdu_free(pdu);
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}
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if (destroy_sim == false) {
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/*
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* Terminate SCSI tasks, asking CAM to requeue them.
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*/
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iscsi_session_terminate_tasks(is, CAM_REQUEUE_REQ);
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return;
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}
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iscsi_session_terminate_tasks(is, CAM_DEV_NOT_THERE);
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if (is->is_sim == NULL)
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return;
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ISCSI_SESSION_DEBUG(is, "deregistering SIM");
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xpt_async(AC_LOST_DEVICE, is->is_path, NULL);
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if (is->is_simq_frozen) {
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is->is_simq_frozen = false;
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xpt_release_simq(is->is_sim, 1);
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}
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xpt_free_path(is->is_path);
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is->is_path = NULL;
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xpt_bus_deregister(cam_sim_path(is->is_sim));
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cam_sim_free(is->is_sim, TRUE /*free_devq*/);
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is->is_sim = NULL;
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is->is_devq = NULL;
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}
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static void
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iscsi_maintenance_thread_reconnect(struct iscsi_session *is)
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{
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/*
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* As we will be reconnecting shortly,
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* discard outstanding data immediately on
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* close(), also notify peer via RST if
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* any packets come in.
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*/
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struct socket *so;
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so = is->is_conn->ic_socket;
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if (so != NULL) {
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struct sockopt sopt;
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struct linger sl;
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sopt.sopt_dir = SOPT_SET;
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sopt.sopt_level = SOL_SOCKET;
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sopt.sopt_name = SO_LINGER;
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sopt.sopt_val = &sl;
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sopt.sopt_valsize = sizeof(sl);
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sl.l_onoff = 1; /* non-zero value enables linger option in kernel */
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sl.l_linger = 0; /* timeout interval in seconds */
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sosetopt(is->is_conn->ic_socket, &sopt);
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}
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icl_conn_close(is->is_conn);
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ISCSI_SESSION_LOCK(is);
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is->is_connected = false;
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is->is_reconnecting = false;
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is->is_login_phase = false;
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#ifdef ICL_KERNEL_PROXY
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if (is->is_login_pdu != NULL) {
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icl_pdu_free(is->is_login_pdu);
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is->is_login_pdu = NULL;
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}
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cv_signal(&is->is_login_cv);
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#endif
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if (fail_on_disconnection) {
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ISCSI_SESSION_DEBUG(is, "connection failed, destroying devices");
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iscsi_session_cleanup(is, true);
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} else {
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iscsi_session_cleanup(is, false);
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}
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KASSERT(TAILQ_EMPTY(&is->is_outstanding),
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("destroying session with active tasks"));
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KASSERT(STAILQ_EMPTY(&is->is_postponed),
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("destroying session with postponed PDUs"));
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if (is->is_conf.isc_enable == 0 && is->is_conf.isc_discovery == 0) {
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ISCSI_SESSION_UNLOCK(is);
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return;
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}
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/*
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* Request immediate reconnection from iscsid(8).
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*/
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//ISCSI_SESSION_DEBUG(is, "waking up iscsid(8)");
|
|
is->is_waiting_for_iscsid = true;
|
|
strlcpy(is->is_reason, "Waiting for iscsid(8)", sizeof(is->is_reason));
|
|
is->is_timeout = 0;
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
cv_signal(&is->is_softc->sc_cv);
|
|
}
|
|
|
|
static void
|
|
iscsi_maintenance_thread_terminate(struct iscsi_session *is)
|
|
{
|
|
struct iscsi_softc *sc;
|
|
|
|
sc = is->is_softc;
|
|
sx_xlock(&sc->sc_lock);
|
|
TAILQ_REMOVE(&sc->sc_sessions, is, is_next);
|
|
sx_xunlock(&sc->sc_lock);
|
|
|
|
icl_conn_close(is->is_conn);
|
|
callout_drain(&is->is_callout);
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
|
|
KASSERT(is->is_terminating, ("is_terminating == false"));
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
|
if (is->is_login_pdu != NULL) {
|
|
icl_pdu_free(is->is_login_pdu);
|
|
is->is_login_pdu = NULL;
|
|
}
|
|
cv_signal(&is->is_login_cv);
|
|
#endif
|
|
|
|
iscsi_session_cleanup(is, true);
|
|
|
|
KASSERT(TAILQ_EMPTY(&is->is_outstanding),
|
|
("destroying session with active tasks"));
|
|
KASSERT(STAILQ_EMPTY(&is->is_postponed),
|
|
("destroying session with postponed PDUs"));
|
|
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
icl_conn_free(is->is_conn);
|
|
mtx_destroy(&is->is_lock);
|
|
cv_destroy(&is->is_maintenance_cv);
|
|
#ifdef ICL_KERNEL_PROXY
|
|
cv_destroy(&is->is_login_cv);
|
|
#endif
|
|
|
|
ISCSI_SESSION_DEBUG(is, "terminated");
|
|
free(is, M_ISCSI);
|
|
|
|
/*
|
|
* The iscsi_unload() routine might be waiting.
|
|
*/
|
|
cv_signal(&sc->sc_cv);
|
|
}
|
|
|
|
static void
|
|
iscsi_maintenance_thread(void *arg)
|
|
{
|
|
struct iscsi_session *is = arg;
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
for (;;) {
|
|
if (is->is_reconnecting == false &&
|
|
is->is_terminating == false &&
|
|
(STAILQ_EMPTY(&is->is_postponed) ||
|
|
ISCSI_SNGT(is->is_cmdsn, is->is_maxcmdsn)))
|
|
cv_wait(&is->is_maintenance_cv, &is->is_lock);
|
|
|
|
/* Terminate supersedes reconnect. */
|
|
if (is->is_terminating) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
iscsi_maintenance_thread_terminate(is);
|
|
kthread_exit();
|
|
return;
|
|
}
|
|
|
|
if (is->is_reconnecting) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
iscsi_maintenance_thread_reconnect(is);
|
|
ISCSI_SESSION_LOCK(is);
|
|
continue;
|
|
}
|
|
|
|
iscsi_session_send_postponed(is);
|
|
}
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
}
|
|
|
|
static void
|
|
iscsi_session_reconnect(struct iscsi_session *is)
|
|
{
|
|
|
|
/*
|
|
* XXX: We can't use locking here, because
|
|
* it's being called from various contexts.
|
|
* Hope it doesn't break anything.
|
|
*/
|
|
if (is->is_reconnecting)
|
|
return;
|
|
|
|
is->is_reconnecting = true;
|
|
cv_signal(&is->is_maintenance_cv);
|
|
}
|
|
|
|
static void
|
|
iscsi_session_terminate(struct iscsi_session *is)
|
|
{
|
|
|
|
if (is->is_terminating)
|
|
return;
|
|
|
|
is->is_terminating = true;
|
|
|
|
#if 0
|
|
iscsi_session_logout(is);
|
|
#endif
|
|
cv_signal(&is->is_maintenance_cv);
|
|
}
|
|
|
|
static void
|
|
iscsi_callout(void *context)
|
|
{
|
|
struct icl_pdu *request;
|
|
struct iscsi_bhs_nop_out *bhsno;
|
|
struct iscsi_session *is;
|
|
bool reconnect_needed = false;
|
|
sbintime_t sbt, pr;
|
|
|
|
is = context;
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
if (is->is_terminating) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
|
|
sbt = mstosbt(995);
|
|
pr = mstosbt(10);
|
|
callout_schedule_sbt(&is->is_callout, sbt, pr, 0);
|
|
|
|
if (is->is_conf.isc_enable == 0)
|
|
goto out;
|
|
|
|
is->is_timeout++;
|
|
|
|
if (is->is_waiting_for_iscsid) {
|
|
if (iscsid_timeout > 0 && is->is_timeout > iscsid_timeout) {
|
|
ISCSI_SESSION_WARN(is, "timed out waiting for iscsid(8) "
|
|
"for %d seconds; reconnecting",
|
|
is->is_timeout);
|
|
reconnect_needed = true;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (is->is_login_phase) {
|
|
if (is->is_login_timeout > 0 && is->is_timeout > is->is_login_timeout) {
|
|
ISCSI_SESSION_WARN(is, "login timed out after %d seconds; "
|
|
"reconnecting", is->is_timeout);
|
|
reconnect_needed = true;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (is->is_ping_timeout <= 0) {
|
|
/*
|
|
* Pings are disabled. Don't send NOP-Out in this case.
|
|
* Reset the timeout, to avoid triggering reconnection,
|
|
* should the user decide to reenable them.
|
|
*/
|
|
is->is_timeout = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (is->is_timeout >= is->is_ping_timeout) {
|
|
ISCSI_SESSION_WARN(is, "no ping reply (NOP-In) after %d seconds; "
|
|
"reconnecting", is->is_ping_timeout);
|
|
reconnect_needed = true;
|
|
goto out;
|
|
}
|
|
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
/*
|
|
* If the ping was reset less than one second ago - which means
|
|
* that we've received some PDU during the last second - assume
|
|
* the traffic flows correctly and don't bother sending a NOP-Out.
|
|
*
|
|
* (It's 2 - one for one second, and one for incrementing is_timeout
|
|
* earlier in this routine.)
|
|
*/
|
|
if (is->is_timeout < 2)
|
|
return;
|
|
|
|
request = icl_pdu_new(is->is_conn, M_NOWAIT);
|
|
if (request == NULL) {
|
|
ISCSI_SESSION_WARN(is, "failed to allocate PDU");
|
|
return;
|
|
}
|
|
bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs;
|
|
bhsno->bhsno_opcode = ISCSI_BHS_OPCODE_NOP_OUT |
|
|
ISCSI_BHS_OPCODE_IMMEDIATE;
|
|
bhsno->bhsno_flags = 0x80;
|
|
bhsno->bhsno_target_transfer_tag = 0xffffffff;
|
|
iscsi_pdu_queue(request);
|
|
return;
|
|
|
|
out:
|
|
if (is->is_terminating) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
if (reconnect_needed)
|
|
iscsi_session_reconnect(is);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_update_statsn(const struct icl_pdu *response)
|
|
{
|
|
const struct iscsi_bhs_data_in *bhsdi;
|
|
struct iscsi_session *is;
|
|
uint32_t expcmdsn, maxcmdsn, statsn;
|
|
|
|
is = PDU_SESSION(response);
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
/*
|
|
* We're only using fields common for all the response
|
|
* (target -> initiator) PDUs.
|
|
*/
|
|
bhsdi = (const struct iscsi_bhs_data_in *)response->ip_bhs;
|
|
/*
|
|
* Ok, I lied. In case of Data-In, "The fields StatSN, Status,
|
|
* and Residual Count only have meaningful content if the S bit
|
|
* is set to 1", so we also need to check the bit specific for
|
|
* Data-In PDU.
|
|
*/
|
|
if (bhsdi->bhsdi_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN ||
|
|
(bhsdi->bhsdi_flags & BHSDI_FLAGS_S) != 0) {
|
|
statsn = ntohl(bhsdi->bhsdi_statsn);
|
|
if (statsn != is->is_statsn && statsn != (is->is_statsn + 1)) {
|
|
/* XXX: This is normal situation for MCS */
|
|
ISCSI_SESSION_WARN(is, "PDU 0x%x StatSN %u != "
|
|
"session ExpStatSN %u (or + 1); reconnecting",
|
|
bhsdi->bhsdi_opcode, statsn, is->is_statsn);
|
|
iscsi_session_reconnect(is);
|
|
}
|
|
if (ISCSI_SNGT(statsn, is->is_statsn))
|
|
is->is_statsn = statsn;
|
|
}
|
|
|
|
expcmdsn = ntohl(bhsdi->bhsdi_expcmdsn);
|
|
maxcmdsn = ntohl(bhsdi->bhsdi_maxcmdsn);
|
|
|
|
if (ISCSI_SNLT(maxcmdsn + 1, expcmdsn)) {
|
|
ISCSI_SESSION_DEBUG(is,
|
|
"PDU MaxCmdSN %u + 1 < PDU ExpCmdSN %u; ignoring",
|
|
maxcmdsn, expcmdsn);
|
|
} else {
|
|
if (ISCSI_SNGT(maxcmdsn, is->is_maxcmdsn)) {
|
|
is->is_maxcmdsn = maxcmdsn;
|
|
|
|
/*
|
|
* Command window increased; kick the maintanance thread
|
|
* to send out postponed commands.
|
|
*/
|
|
if (!STAILQ_EMPTY(&is->is_postponed))
|
|
cv_signal(&is->is_maintenance_cv);
|
|
} else if (ISCSI_SNLT(maxcmdsn, is->is_maxcmdsn)) {
|
|
/* XXX: This is normal situation for MCS */
|
|
ISCSI_SESSION_DEBUG(is,
|
|
"PDU MaxCmdSN %u < session MaxCmdSN %u; ignoring",
|
|
maxcmdsn, is->is_maxcmdsn);
|
|
}
|
|
|
|
if (ISCSI_SNGT(expcmdsn, is->is_expcmdsn)) {
|
|
is->is_expcmdsn = expcmdsn;
|
|
} else if (ISCSI_SNLT(expcmdsn, is->is_expcmdsn)) {
|
|
/* XXX: This is normal situation for MCS */
|
|
ISCSI_SESSION_DEBUG(is,
|
|
"PDU ExpCmdSN %u < session ExpCmdSN %u; ignoring",
|
|
expcmdsn, is->is_expcmdsn);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Every incoming PDU - not just NOP-In - resets the ping timer.
|
|
* The purpose of the timeout is to reset the connection when it stalls;
|
|
* we don't want this to happen when NOP-In or NOP-Out ends up delayed
|
|
* in some queue.
|
|
*/
|
|
is->is_timeout = 0;
|
|
}
|
|
|
|
static void
|
|
iscsi_receive_callback(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_session *is;
|
|
|
|
is = PDU_SESSION(response);
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
|
|
iscsi_pdu_update_statsn(response);
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
|
if (is->is_login_phase) {
|
|
if (is->is_login_pdu == NULL)
|
|
is->is_login_pdu = response;
|
|
else
|
|
icl_pdu_free(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
cv_signal(&is->is_login_cv);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* The handling routine is responsible for freeing the PDU
|
|
* when it's no longer needed.
|
|
*/
|
|
switch (response->ip_bhs->bhs_opcode) {
|
|
case ISCSI_BHS_OPCODE_NOP_IN:
|
|
iscsi_pdu_handle_nop_in(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_SCSI_RESPONSE:
|
|
iscsi_pdu_handle_scsi_response(response);
|
|
/* Session lock dropped inside. */
|
|
ISCSI_SESSION_LOCK_ASSERT_NOT(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_TASK_RESPONSE:
|
|
iscsi_pdu_handle_task_response(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_SCSI_DATA_IN:
|
|
iscsi_pdu_handle_data_in(response);
|
|
/* Session lock dropped inside. */
|
|
ISCSI_SESSION_LOCK_ASSERT_NOT(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_LOGOUT_RESPONSE:
|
|
iscsi_pdu_handle_logout_response(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_R2T:
|
|
iscsi_pdu_handle_r2t(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_ASYNC_MESSAGE:
|
|
iscsi_pdu_handle_async_message(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
break;
|
|
case ISCSI_BHS_OPCODE_REJECT:
|
|
iscsi_pdu_handle_reject(response);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
break;
|
|
default:
|
|
ISCSI_SESSION_WARN(is, "received PDU with unsupported "
|
|
"opcode 0x%x; reconnecting",
|
|
response->ip_bhs->bhs_opcode);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
icl_pdu_free(response);
|
|
}
|
|
}
|
|
|
|
static void
|
|
iscsi_error_callback(struct icl_conn *ic)
|
|
{
|
|
struct iscsi_session *is;
|
|
|
|
is = CONN_SESSION(ic);
|
|
|
|
ISCSI_SESSION_WARN(is, "connection error; reconnecting");
|
|
iscsi_session_reconnect(is);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_nop_in(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_session *is;
|
|
struct iscsi_bhs_nop_out *bhsno;
|
|
struct iscsi_bhs_nop_in *bhsni;
|
|
struct icl_pdu *request;
|
|
void *data = NULL;
|
|
size_t datasize;
|
|
int error;
|
|
|
|
is = PDU_SESSION(response);
|
|
bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs;
|
|
|
|
if (bhsni->bhsni_target_transfer_tag == 0xffffffff) {
|
|
/*
|
|
* Nothing to do; iscsi_pdu_update_statsn() already
|
|
* zeroed the timeout.
|
|
*/
|
|
icl_pdu_free(response);
|
|
return;
|
|
}
|
|
|
|
datasize = icl_pdu_data_segment_length(response);
|
|
if (datasize > 0) {
|
|
data = malloc(datasize, M_ISCSI, M_NOWAIT | M_ZERO);
|
|
if (data == NULL) {
|
|
ISCSI_SESSION_WARN(is, "failed to allocate memory; "
|
|
"reconnecting");
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
icl_pdu_get_data(response, 0, data, datasize);
|
|
}
|
|
|
|
request = icl_pdu_new(response->ip_conn, M_NOWAIT);
|
|
if (request == NULL) {
|
|
ISCSI_SESSION_WARN(is, "failed to allocate memory; "
|
|
"reconnecting");
|
|
free(data, M_ISCSI);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs;
|
|
bhsno->bhsno_opcode = ISCSI_BHS_OPCODE_NOP_OUT |
|
|
ISCSI_BHS_OPCODE_IMMEDIATE;
|
|
bhsno->bhsno_flags = 0x80;
|
|
bhsno->bhsno_initiator_task_tag = 0xffffffff;
|
|
bhsno->bhsno_target_transfer_tag = bhsni->bhsni_target_transfer_tag;
|
|
if (datasize > 0) {
|
|
error = icl_pdu_append_data(request, data, datasize, M_NOWAIT);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is, "failed to allocate memory; "
|
|
"reconnecting");
|
|
free(data, M_ISCSI);
|
|
icl_pdu_free(request);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
free(data, M_ISCSI);
|
|
}
|
|
|
|
icl_pdu_free(response);
|
|
iscsi_pdu_queue_locked(request);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_scsi_response(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_bhs_scsi_response *bhssr;
|
|
struct iscsi_outstanding *io;
|
|
struct iscsi_session *is;
|
|
union ccb *ccb;
|
|
struct ccb_scsiio *csio;
|
|
size_t data_segment_len, received;
|
|
uint16_t sense_len;
|
|
uint32_t resid;
|
|
|
|
is = PDU_SESSION(response);
|
|
|
|
bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
|
|
io = iscsi_outstanding_find(is, bhssr->bhssr_initiator_task_tag);
|
|
if (io == NULL || io->io_ccb == NULL) {
|
|
ISCSI_SESSION_WARN(is, "bad itt 0x%x", bhssr->bhssr_initiator_task_tag);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
|
|
ccb = io->io_ccb;
|
|
if (bhssr->bhssr_response == BHSSR_RESPONSE_COMMAND_COMPLETED) {
|
|
if (ntohl(bhssr->bhssr_expdatasn) != io->io_datasn) {
|
|
ISCSI_SESSION_WARN(is,
|
|
"ExpDataSN mismatch in SCSI Response (%u vs %u)",
|
|
ntohl(bhssr->bhssr_expdatasn), io->io_datasn);
|
|
|
|
/*
|
|
* XXX: Permit an ExpDataSN of zero for errors.
|
|
*
|
|
* This doesn't conform to RFC 7143, but some
|
|
* targets seem to do this.
|
|
*/
|
|
if (bhssr->bhssr_status != 0 &&
|
|
bhssr->bhssr_expdatasn == htonl(0))
|
|
goto skip_expdatasn;
|
|
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
} else {
|
|
if (bhssr->bhssr_expdatasn != htonl(0)) {
|
|
ISCSI_SESSION_WARN(is,
|
|
"ExpDataSN mismatch in SCSI Response (%u vs 0)",
|
|
ntohl(bhssr->bhssr_expdatasn));
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
}
|
|
skip_expdatasn:
|
|
|
|
/*
|
|
* With iSER, after getting good response we can be sure
|
|
* that all the data has been successfully transferred.
|
|
*/
|
|
if (is->is_conn->ic_iser) {
|
|
resid = ntohl(bhssr->bhssr_residual_count);
|
|
if (bhssr->bhssr_flags & BHSSR_FLAGS_RESIDUAL_UNDERFLOW) {
|
|
io->io_received = ccb->csio.dxfer_len - resid;
|
|
} else if (bhssr->bhssr_flags & BHSSR_FLAGS_RESIDUAL_OVERFLOW) {
|
|
ISCSI_SESSION_WARN(is, "overflow: target indicates %d", resid);
|
|
} else {
|
|
io->io_received = ccb->csio.dxfer_len;
|
|
}
|
|
}
|
|
|
|
received = io->io_received;
|
|
iscsi_outstanding_remove(is, io);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
if (bhssr->bhssr_response != BHSSR_RESPONSE_COMMAND_COMPLETED) {
|
|
ISCSI_SESSION_WARN(is, "service response 0x%x", bhssr->bhssr_response);
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_REQ_CMP_ERR | CAM_DEV_QFRZN;
|
|
} else if (bhssr->bhssr_status == 0) {
|
|
ccb->ccb_h.status = CAM_REQ_CMP;
|
|
} else {
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_DEV_QFRZN;
|
|
ccb->csio.scsi_status = bhssr->bhssr_status;
|
|
}
|
|
|
|
csio = &ccb->csio;
|
|
data_segment_len = icl_pdu_data_segment_length(response);
|
|
if (data_segment_len > 0) {
|
|
if (data_segment_len < sizeof(sense_len)) {
|
|
ISCSI_SESSION_WARN(is, "truncated data segment (%zd bytes)",
|
|
data_segment_len);
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_REQ_CMP_ERR | CAM_DEV_QFRZN;
|
|
goto out;
|
|
}
|
|
icl_pdu_get_data(response, 0, &sense_len, sizeof(sense_len));
|
|
sense_len = ntohs(sense_len);
|
|
#if 0
|
|
ISCSI_SESSION_DEBUG(is, "sense_len %d, data len %zd",
|
|
sense_len, data_segment_len);
|
|
#endif
|
|
if (sizeof(sense_len) + sense_len > data_segment_len) {
|
|
ISCSI_SESSION_WARN(is, "truncated data segment "
|
|
"(%zd bytes, should be %zd)",
|
|
data_segment_len, sizeof(sense_len) + sense_len);
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_REQ_CMP_ERR | CAM_DEV_QFRZN;
|
|
goto out;
|
|
} else if (sizeof(sense_len) + sense_len < data_segment_len)
|
|
ISCSI_SESSION_WARN(is, "oversize data segment "
|
|
"(%zd bytes, should be %zd)",
|
|
data_segment_len, sizeof(sense_len) + sense_len);
|
|
if (sense_len > csio->sense_len) {
|
|
ISCSI_SESSION_DEBUG(is, "truncating sense from %d to %d",
|
|
sense_len, csio->sense_len);
|
|
sense_len = csio->sense_len;
|
|
}
|
|
icl_pdu_get_data(response, sizeof(sense_len), &csio->sense_data, sense_len);
|
|
csio->sense_resid = csio->sense_len - sense_len;
|
|
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
|
|
}
|
|
|
|
out:
|
|
if (bhssr->bhssr_flags & BHSSR_FLAGS_RESIDUAL_UNDERFLOW)
|
|
csio->resid = ntohl(bhssr->bhssr_residual_count);
|
|
|
|
if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
|
|
KASSERT(received <= csio->dxfer_len,
|
|
("received > csio->dxfer_len"));
|
|
if (received < csio->dxfer_len) {
|
|
if (csio->resid != csio->dxfer_len - received) {
|
|
ISCSI_SESSION_WARN(is, "underflow mismatch: "
|
|
"target indicates %d, we calculated %zd",
|
|
csio->resid, csio->dxfer_len - received);
|
|
}
|
|
csio->resid = csio->dxfer_len - received;
|
|
}
|
|
}
|
|
|
|
xpt_done(ccb);
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_task_response(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_bhs_task_management_response *bhstmr;
|
|
struct iscsi_outstanding *io, *aio;
|
|
struct iscsi_session *is;
|
|
|
|
is = PDU_SESSION(response);
|
|
|
|
bhstmr = (struct iscsi_bhs_task_management_response *)response->ip_bhs;
|
|
io = iscsi_outstanding_find(is, bhstmr->bhstmr_initiator_task_tag);
|
|
if (io == NULL || io->io_ccb != NULL) {
|
|
ISCSI_SESSION_WARN(is, "bad itt 0x%x",
|
|
bhstmr->bhstmr_initiator_task_tag);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
if (bhstmr->bhstmr_response != BHSTMR_RESPONSE_FUNCTION_COMPLETE) {
|
|
ISCSI_SESSION_WARN(is, "task response 0x%x",
|
|
bhstmr->bhstmr_response);
|
|
} else {
|
|
aio = iscsi_outstanding_find(is, io->io_referenced_task_tag);
|
|
if (aio != NULL && aio->io_ccb != NULL)
|
|
iscsi_session_terminate_task(is, aio, CAM_REQ_ABORTED);
|
|
}
|
|
|
|
iscsi_outstanding_remove(is, io);
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_get_data_csio(struct icl_pdu *response, size_t pdu_offset,
|
|
struct ccb_scsiio *csio, size_t oreceived, size_t data_segment_len)
|
|
{
|
|
switch (csio->ccb_h.flags & CAM_DATA_MASK) {
|
|
case CAM_DATA_BIO:
|
|
icl_pdu_get_bio(response, pdu_offset,
|
|
(struct bio *)csio->data_ptr, oreceived, data_segment_len);
|
|
break;
|
|
case CAM_DATA_VADDR:
|
|
icl_pdu_get_data(response, pdu_offset,
|
|
csio->data_ptr + oreceived, data_segment_len);
|
|
break;
|
|
default:
|
|
__assert_unreachable();
|
|
}
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_data_in(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_bhs_data_in *bhsdi;
|
|
struct iscsi_outstanding *io;
|
|
struct iscsi_session *is;
|
|
union ccb *ccb;
|
|
struct ccb_scsiio *csio;
|
|
size_t data_segment_len, received, oreceived;
|
|
|
|
is = PDU_SESSION(response);
|
|
bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs;
|
|
io = iscsi_outstanding_find(is, bhsdi->bhsdi_initiator_task_tag);
|
|
if (io == NULL || io->io_ccb == NULL) {
|
|
ISCSI_SESSION_WARN(is, "bad itt 0x%x", bhsdi->bhsdi_initiator_task_tag);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
|
|
if (io->io_datasn != ntohl(bhsdi->bhsdi_datasn)) {
|
|
ISCSI_SESSION_WARN(is, "received Data-In PDU with "
|
|
"DataSN %u, while expected %u; dropping connection",
|
|
ntohl(bhsdi->bhsdi_datasn), io->io_datasn);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
io->io_datasn += response->ip_additional_pdus + 1;
|
|
|
|
data_segment_len = icl_pdu_data_segment_length(response);
|
|
if (data_segment_len == 0) {
|
|
/*
|
|
* "The sending of 0 length data segments should be avoided,
|
|
* but initiators and targets MUST be able to properly receive
|
|
* 0 length data segments."
|
|
*/
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
icl_pdu_free(response);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We need to track this for security reasons - without it, malicious target
|
|
* could respond to SCSI READ without sending Data-In PDUs, which would result
|
|
* in read operation on the initiator side returning random kernel data.
|
|
*/
|
|
if (ntohl(bhsdi->bhsdi_buffer_offset) != io->io_received) {
|
|
ISCSI_SESSION_WARN(is, "data out of order; expected offset %zd, got %zd",
|
|
io->io_received, (size_t)ntohl(bhsdi->bhsdi_buffer_offset));
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
|
|
ccb = io->io_ccb;
|
|
csio = &ccb->csio;
|
|
|
|
if (io->io_received + data_segment_len > csio->dxfer_len) {
|
|
ISCSI_SESSION_WARN(is, "oversize data segment (%zd bytes "
|
|
"at offset %zd, buffer is %d)",
|
|
data_segment_len, io->io_received, csio->dxfer_len);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return;
|
|
}
|
|
|
|
oreceived = io->io_received;
|
|
io->io_received += data_segment_len;
|
|
received = io->io_received;
|
|
if ((bhsdi->bhsdi_flags & BHSDI_FLAGS_S) != 0)
|
|
iscsi_outstanding_remove(is, io);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
iscsi_pdu_get_data_csio(response, 0, csio, oreceived, data_segment_len);
|
|
|
|
/*
|
|
* XXX: Check F.
|
|
*/
|
|
if ((bhsdi->bhsdi_flags & BHSDI_FLAGS_S) == 0) {
|
|
/*
|
|
* Nothing more to do.
|
|
*/
|
|
icl_pdu_free(response);
|
|
return;
|
|
}
|
|
|
|
//ISCSI_SESSION_DEBUG(is, "got S flag; status 0x%x", bhsdi->bhsdi_status);
|
|
if (bhsdi->bhsdi_status == 0) {
|
|
ccb->ccb_h.status = CAM_REQ_CMP;
|
|
} else {
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_DEV_QFRZN;
|
|
csio->scsi_status = bhsdi->bhsdi_status;
|
|
}
|
|
|
|
if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) {
|
|
KASSERT(received <= csio->dxfer_len,
|
|
("received > csio->dxfer_len"));
|
|
if (received < csio->dxfer_len) {
|
|
csio->resid = ntohl(bhsdi->bhsdi_residual_count);
|
|
if (csio->resid != csio->dxfer_len - received) {
|
|
ISCSI_SESSION_WARN(is, "underflow mismatch: "
|
|
"target indicates %d, we calculated %zd",
|
|
csio->resid, csio->dxfer_len - received);
|
|
}
|
|
csio->resid = csio->dxfer_len - received;
|
|
}
|
|
}
|
|
|
|
xpt_done(ccb);
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_logout_response(struct icl_pdu *response)
|
|
{
|
|
|
|
ISCSI_SESSION_DEBUG(PDU_SESSION(response), "logout response");
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static int
|
|
iscsi_pdu_append_data_csio(struct icl_pdu *request, struct ccb_scsiio *csio,
|
|
size_t off, size_t len, int how)
|
|
{
|
|
switch (csio->ccb_h.flags & CAM_DATA_MASK) {
|
|
case CAM_DATA_BIO:
|
|
return (icl_pdu_append_bio(request,
|
|
(struct bio *)csio->data_ptr, off, len, how));
|
|
case CAM_DATA_VADDR:
|
|
return (icl_pdu_append_data(request, csio->data_ptr + off, len,
|
|
how));
|
|
default:
|
|
__assert_unreachable();
|
|
}
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_r2t(struct icl_pdu *response)
|
|
{
|
|
struct icl_pdu *request;
|
|
struct iscsi_session *is;
|
|
struct iscsi_bhs_r2t *bhsr2t;
|
|
struct iscsi_bhs_data_out *bhsdo;
|
|
struct iscsi_outstanding *io;
|
|
struct ccb_scsiio *csio;
|
|
size_t off, len, max_send_data_segment_length, total_len;
|
|
int error;
|
|
uint32_t datasn = 0;
|
|
|
|
is = PDU_SESSION(response);
|
|
|
|
bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs;
|
|
io = iscsi_outstanding_find(is, bhsr2t->bhsr2t_initiator_task_tag);
|
|
if (io == NULL || io->io_ccb == NULL) {
|
|
ISCSI_SESSION_WARN(is, "bad itt 0x%x; reconnecting",
|
|
bhsr2t->bhsr2t_initiator_task_tag);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
csio = &io->io_ccb->csio;
|
|
|
|
if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_OUT) {
|
|
ISCSI_SESSION_WARN(is, "received R2T for read command; reconnecting");
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* XXX: Verify R2TSN.
|
|
*/
|
|
|
|
off = ntohl(bhsr2t->bhsr2t_buffer_offset);
|
|
if (off > csio->dxfer_len) {
|
|
ISCSI_SESSION_WARN(is, "target requested invalid offset "
|
|
"%zd, buffer is %d; reconnecting", off, csio->dxfer_len);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
total_len = ntohl(bhsr2t->bhsr2t_desired_data_transfer_length);
|
|
if (total_len == 0 || total_len > csio->dxfer_len) {
|
|
ISCSI_SESSION_WARN(is, "target requested invalid length "
|
|
"%zd, buffer is %d; reconnecting", total_len, csio->dxfer_len);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
//ISCSI_SESSION_DEBUG(is, "r2t; off %zd, len %zd", off, total_len);
|
|
|
|
if (is->is_conn->ic_hw_isomax != 0)
|
|
max_send_data_segment_length = is->is_conn->ic_hw_isomax;
|
|
else
|
|
max_send_data_segment_length =
|
|
is->is_conn->ic_max_send_data_segment_length;
|
|
for (;;) {
|
|
len = total_len;
|
|
|
|
if (len > max_send_data_segment_length)
|
|
len = max_send_data_segment_length;
|
|
|
|
if (off + len > csio->dxfer_len) {
|
|
ISCSI_SESSION_WARN(is, "target requested invalid "
|
|
"length/offset %zd, buffer is %d; reconnecting",
|
|
off + len, csio->dxfer_len);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
request = icl_pdu_new(response->ip_conn, M_NOWAIT);
|
|
if (request == NULL) {
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
|
|
bhsdo->bhsdo_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_OUT;
|
|
bhsdo->bhsdo_lun = bhsr2t->bhsr2t_lun;
|
|
bhsdo->bhsdo_initiator_task_tag =
|
|
bhsr2t->bhsr2t_initiator_task_tag;
|
|
bhsdo->bhsdo_target_transfer_tag =
|
|
bhsr2t->bhsr2t_target_transfer_tag;
|
|
bhsdo->bhsdo_datasn = htonl(datasn);
|
|
bhsdo->bhsdo_buffer_offset = htonl(off);
|
|
error = iscsi_pdu_append_data_csio(request, csio, off, len,
|
|
M_NOWAIT | ICL_NOCOPY);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is, "failed to allocate memory; "
|
|
"reconnecting");
|
|
icl_pdu_free(request);
|
|
icl_pdu_free(response);
|
|
iscsi_session_reconnect(is);
|
|
return;
|
|
}
|
|
|
|
datasn += howmany(len,
|
|
is->is_conn->ic_max_send_data_segment_length);
|
|
off += len;
|
|
total_len -= len;
|
|
|
|
if (total_len == 0) {
|
|
bhsdo->bhsdo_flags |= BHSDO_FLAGS_F;
|
|
//ISCSI_SESSION_DEBUG(is, "setting F, off %zd", off);
|
|
} else {
|
|
//ISCSI_SESSION_DEBUG(is, "not finished, off %zd", off);
|
|
}
|
|
|
|
iscsi_pdu_queue_locked(request);
|
|
|
|
if (total_len == 0)
|
|
break;
|
|
}
|
|
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_async_message(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_bhs_asynchronous_message *bhsam;
|
|
struct iscsi_session *is;
|
|
|
|
is = PDU_SESSION(response);
|
|
bhsam = (struct iscsi_bhs_asynchronous_message *)response->ip_bhs;
|
|
switch (bhsam->bhsam_async_event) {
|
|
case BHSAM_EVENT_TARGET_REQUESTS_LOGOUT:
|
|
ISCSI_SESSION_WARN(is, "target requests logout; removing session");
|
|
iscsi_session_logout(is);
|
|
iscsi_session_terminate(is);
|
|
break;
|
|
case BHSAM_EVENT_TARGET_TERMINATES_CONNECTION:
|
|
ISCSI_SESSION_WARN(is, "target indicates it will drop the connection");
|
|
break;
|
|
case BHSAM_EVENT_TARGET_TERMINATES_SESSION:
|
|
ISCSI_SESSION_WARN(is, "target indicates it will drop the session");
|
|
break;
|
|
default:
|
|
/*
|
|
* XXX: Technically, we're obligated to also handle
|
|
* parameter renegotiation.
|
|
*/
|
|
ISCSI_SESSION_WARN(is, "ignoring AsyncEvent %d", bhsam->bhsam_async_event);
|
|
break;
|
|
}
|
|
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static void
|
|
iscsi_pdu_handle_reject(struct icl_pdu *response)
|
|
{
|
|
struct iscsi_bhs_reject *bhsr;
|
|
struct iscsi_session *is;
|
|
|
|
is = PDU_SESSION(response);
|
|
bhsr = (struct iscsi_bhs_reject *)response->ip_bhs;
|
|
ISCSI_SESSION_WARN(is, "received Reject PDU, reason 0x%x; protocol error?",
|
|
bhsr->bhsr_reason);
|
|
|
|
icl_pdu_free(response);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_daemon_wait(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_request *request, bool freebsd13)
|
|
{
|
|
struct iscsi_session *is;
|
|
int error;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
for (;;) {
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
ISCSI_SESSION_LOCK(is);
|
|
if (is->is_conf.isc_enable == 0 &&
|
|
is->is_conf.isc_discovery == 0) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
continue;
|
|
}
|
|
if (is->is_waiting_for_iscsid)
|
|
break;
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
}
|
|
|
|
if (is == NULL) {
|
|
if (sc->sc_unloading) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ENXIO);
|
|
}
|
|
|
|
/*
|
|
* No session requires attention from iscsid(8); wait.
|
|
*/
|
|
error = cv_wait_sig(&sc->sc_cv, &sc->sc_lock);
|
|
if (error != 0) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (error);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
is->is_waiting_for_iscsid = false;
|
|
is->is_login_phase = true;
|
|
is->is_reason[0] = '\0';
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
request->idr_session_id = is->is_id;
|
|
memcpy(&request->idr_isid, &is->is_isid,
|
|
sizeof(request->idr_isid));
|
|
request->idr_tsih = 0; /* New or reinstated session. */
|
|
memcpy(&request->idr_conf, &is->is_conf,
|
|
sizeof(request->idr_conf));
|
|
|
|
#ifdef COMPAT_FREEBSD13
|
|
if (freebsd13) {
|
|
struct icl_drv_limits idl;
|
|
struct iscsi_daemon_request13 *request13;
|
|
|
|
error = icl_limits(is->is_conf.isc_offload,
|
|
is->is_conf.isc_iser, 0, &idl);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is, "icl_limits for "
|
|
"offload \"%s\" failed with error %d",
|
|
is->is_conf.isc_offload, error);
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (error);
|
|
}
|
|
request13 = (struct iscsi_daemon_request13 *)request;
|
|
request13->idr_limits.isl_max_recv_data_segment_length =
|
|
idl.idl_max_recv_data_segment_length;
|
|
request13->idr_limits.isl_max_send_data_segment_length =
|
|
idl.idl_max_send_data_segment_length;
|
|
request13->idr_limits.isl_max_burst_length =
|
|
idl.idl_max_burst_length;
|
|
request13->idr_limits.isl_first_burst_length =
|
|
idl.idl_first_burst_length;
|
|
}
|
|
#endif
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_daemon_limits(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_limits *limits)
|
|
{
|
|
struct icl_drv_limits idl;
|
|
struct iscsi_session *is;
|
|
int error;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
|
|
/*
|
|
* Find the session to fetch limits for.
|
|
*/
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (is->is_id == limits->idl_session_id)
|
|
break;
|
|
}
|
|
if (is == NULL) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
|
|
error = icl_limits(is->is_conf.isc_offload, is->is_conf.isc_iser,
|
|
limits->idl_socket, &idl);
|
|
sx_sunlock(&sc->sc_lock);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is, "icl_limits for offload \"%s\" "
|
|
"failed with error %d", is->is_conf.isc_offload, error);
|
|
return (error);
|
|
}
|
|
limits->idl_limits.isl_max_recv_data_segment_length =
|
|
idl.idl_max_recv_data_segment_length;
|
|
limits->idl_limits.isl_max_send_data_segment_length =
|
|
idl.idl_max_send_data_segment_length;
|
|
limits->idl_limits.isl_max_burst_length =
|
|
idl.idl_max_burst_length;
|
|
limits->idl_limits.isl_first_burst_length =
|
|
idl.idl_first_burst_length;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_daemon_handoff(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_handoff *handoff)
|
|
{
|
|
struct iscsi_session *is;
|
|
struct icl_conn *ic;
|
|
int error;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
|
|
/*
|
|
* Find the session to hand off socket to.
|
|
*/
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (is->is_id == handoff->idh_session_id)
|
|
break;
|
|
}
|
|
if (is == NULL) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
ISCSI_SESSION_LOCK(is);
|
|
ic = is->is_conn;
|
|
if (is->is_conf.isc_discovery || is->is_terminating) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (EINVAL);
|
|
}
|
|
if (is->is_connected) {
|
|
/*
|
|
* This might have happened because another iscsid(8)
|
|
* instance handed off the connection in the meantime.
|
|
* Just return.
|
|
*/
|
|
ISCSI_SESSION_WARN(is, "handoff on already connected "
|
|
"session");
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (EBUSY);
|
|
}
|
|
|
|
strlcpy(is->is_target_alias, handoff->idh_target_alias,
|
|
sizeof(is->is_target_alias));
|
|
is->is_tsih = handoff->idh_tsih;
|
|
is->is_statsn = handoff->idh_statsn;
|
|
is->is_protocol_level = handoff->idh_protocol_level;
|
|
is->is_initial_r2t = handoff->idh_initial_r2t;
|
|
is->is_immediate_data = handoff->idh_immediate_data;
|
|
|
|
ic->ic_max_recv_data_segment_length =
|
|
handoff->idh_max_recv_data_segment_length;
|
|
ic->ic_max_send_data_segment_length =
|
|
handoff->idh_max_send_data_segment_length;
|
|
is->is_max_burst_length = handoff->idh_max_burst_length;
|
|
is->is_first_burst_length = handoff->idh_first_burst_length;
|
|
|
|
if (handoff->idh_header_digest == ISCSI_DIGEST_CRC32C)
|
|
ic->ic_header_crc32c = true;
|
|
else
|
|
ic->ic_header_crc32c = false;
|
|
if (handoff->idh_data_digest == ISCSI_DIGEST_CRC32C)
|
|
ic->ic_data_crc32c = true;
|
|
else
|
|
ic->ic_data_crc32c = false;
|
|
ic->ic_maxtags = maxtags;
|
|
|
|
is->is_cmdsn = 0;
|
|
is->is_expcmdsn = 0;
|
|
is->is_maxcmdsn = 0;
|
|
is->is_waiting_for_iscsid = false;
|
|
is->is_login_phase = false;
|
|
is->is_timeout = 0;
|
|
is->is_ping_timeout = is->is_conf.isc_ping_timeout;
|
|
if (is->is_ping_timeout < 0)
|
|
is->is_ping_timeout = ping_timeout;
|
|
is->is_login_timeout = is->is_conf.isc_login_timeout;
|
|
if (is->is_login_timeout < 0)
|
|
is->is_login_timeout = login_timeout;
|
|
is->is_connected = true;
|
|
is->is_reason[0] = '\0';
|
|
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
/*
|
|
* If we're going through the proxy, the idh_socket will be 0,
|
|
* and the ICL module can simply ignore this call. It can also
|
|
* use it to determine it's no longer in the Login phase.
|
|
*/
|
|
error = icl_conn_handoff(ic, handoff->idh_socket);
|
|
if (error != 0) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
iscsi_session_terminate(is);
|
|
return (error);
|
|
}
|
|
|
|
sx_sunlock(&sc->sc_lock);
|
|
|
|
if (is->is_sim != NULL) {
|
|
/*
|
|
* When reconnecting, there already is SIM allocated for the session.
|
|
*/
|
|
KASSERT(is->is_simq_frozen, ("reconnect without frozen simq"));
|
|
ISCSI_SESSION_LOCK(is);
|
|
ISCSI_SESSION_DEBUG(is, "releasing");
|
|
is->is_simq_frozen = false;
|
|
xpt_release_simq(is->is_sim, 1);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
} else {
|
|
ISCSI_SESSION_LOCK(is);
|
|
is->is_devq = cam_simq_alloc(ic->ic_maxtags);
|
|
if (is->is_devq == NULL) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
ISCSI_SESSION_WARN(is, "failed to allocate simq");
|
|
iscsi_session_terminate(is);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
is->is_sim = cam_sim_alloc(iscsi_action, NULL, "iscsi",
|
|
is, is->is_id /* unit */, &is->is_lock,
|
|
1, ic->ic_maxtags, is->is_devq);
|
|
if (is->is_sim == NULL) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
ISCSI_SESSION_WARN(is, "failed to allocate SIM");
|
|
cam_simq_free(is->is_devq);
|
|
iscsi_session_terminate(is);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
if (xpt_bus_register(is->is_sim, NULL, 0) != 0) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
ISCSI_SESSION_WARN(is, "failed to register bus");
|
|
iscsi_session_terminate(is);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
error = xpt_create_path(&is->is_path, /*periph*/NULL,
|
|
cam_sim_path(is->is_sim), CAM_TARGET_WILDCARD,
|
|
CAM_LUN_WILDCARD);
|
|
if (error != CAM_REQ_CMP) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
ISCSI_SESSION_WARN(is, "failed to create path");
|
|
iscsi_session_terminate(is);
|
|
return (ENOMEM);
|
|
}
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_daemon_fail(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_fail *fail)
|
|
{
|
|
struct iscsi_session *is;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (is->is_id == fail->idf_session_id)
|
|
break;
|
|
}
|
|
if (is == NULL) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
ISCSI_SESSION_LOCK(is);
|
|
ISCSI_SESSION_DEBUG(is, "iscsid(8) failed: %s",
|
|
fail->idf_reason);
|
|
strlcpy(is->is_reason, fail->idf_reason, sizeof(is->is_reason));
|
|
//is->is_waiting_for_iscsid = false;
|
|
//is->is_login_phase = true;
|
|
//iscsi_session_reconnect(is);
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
sx_sunlock(&sc->sc_lock);
|
|
|
|
return (0);
|
|
}
|
|
|
|
#ifdef ICL_KERNEL_PROXY
|
|
static int
|
|
iscsi_ioctl_daemon_connect(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_connect *idc)
|
|
{
|
|
struct iscsi_session *is;
|
|
struct sockaddr *from_sa, *to_sa;
|
|
int error;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (is->is_id == idc->idc_session_id)
|
|
break;
|
|
}
|
|
if (is == NULL) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
sx_sunlock(&sc->sc_lock);
|
|
|
|
if (idc->idc_from_addrlen > 0) {
|
|
error = getsockaddr(&from_sa, (void *)idc->idc_from_addr, idc->idc_from_addrlen);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is,
|
|
"getsockaddr failed with error %d", error);
|
|
return (error);
|
|
}
|
|
} else {
|
|
from_sa = NULL;
|
|
}
|
|
error = getsockaddr(&to_sa, (void *)idc->idc_to_addr, idc->idc_to_addrlen);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is, "getsockaddr failed with error %d",
|
|
error);
|
|
free(from_sa, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
is->is_statsn = 0;
|
|
is->is_cmdsn = 0;
|
|
is->is_expcmdsn = 0;
|
|
is->is_maxcmdsn = 0;
|
|
is->is_waiting_for_iscsid = false;
|
|
is->is_login_phase = true;
|
|
is->is_timeout = 0;
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
error = icl_conn_connect(is->is_conn, idc->idc_domain,
|
|
idc->idc_socktype, idc->idc_protocol, from_sa, to_sa);
|
|
free(from_sa, M_SONAME);
|
|
free(to_sa, M_SONAME);
|
|
|
|
/*
|
|
* Digests are always disabled during login phase.
|
|
*/
|
|
is->is_conn->ic_header_crc32c = false;
|
|
is->is_conn->ic_data_crc32c = false;
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_daemon_send(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_send *ids)
|
|
{
|
|
struct iscsi_session *is;
|
|
struct icl_pdu *ip;
|
|
size_t datalen;
|
|
void *data;
|
|
int error;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (is->is_id == ids->ids_session_id)
|
|
break;
|
|
}
|
|
if (is == NULL) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
sx_sunlock(&sc->sc_lock);
|
|
|
|
if (is->is_login_phase == false)
|
|
return (EBUSY);
|
|
|
|
if (is->is_terminating || is->is_reconnecting)
|
|
return (EIO);
|
|
|
|
datalen = ids->ids_data_segment_len;
|
|
if (datalen > is->is_conn->ic_max_send_data_segment_length)
|
|
return (EINVAL);
|
|
if (datalen > 0) {
|
|
data = malloc(datalen, M_ISCSI, M_WAITOK);
|
|
error = copyin(ids->ids_data_segment, data, datalen);
|
|
if (error != 0) {
|
|
free(data, M_ISCSI);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
ip = icl_pdu_new(is->is_conn, M_WAITOK);
|
|
memcpy(ip->ip_bhs, ids->ids_bhs, sizeof(*ip->ip_bhs));
|
|
if (datalen > 0) {
|
|
error = icl_pdu_append_data(ip, data, datalen, M_WAITOK);
|
|
KASSERT(error == 0, ("icl_pdu_append_data(..., M_WAITOK) failed"));
|
|
free(data, M_ISCSI);
|
|
}
|
|
iscsi_pdu_queue(ip);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_daemon_receive(struct iscsi_softc *sc,
|
|
struct iscsi_daemon_receive *idr)
|
|
{
|
|
struct iscsi_session *is;
|
|
struct icl_pdu *ip;
|
|
void *data;
|
|
int error;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (is->is_id == idr->idr_session_id)
|
|
break;
|
|
}
|
|
if (is == NULL) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
sx_sunlock(&sc->sc_lock);
|
|
|
|
if (is->is_login_phase == false)
|
|
return (EBUSY);
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
while (is->is_login_pdu == NULL &&
|
|
is->is_terminating == false &&
|
|
is->is_reconnecting == false) {
|
|
error = cv_wait_sig(&is->is_login_cv, &is->is_lock);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return (error);
|
|
}
|
|
}
|
|
if (is->is_terminating || is->is_reconnecting) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
return (EIO);
|
|
}
|
|
ip = is->is_login_pdu;
|
|
is->is_login_pdu = NULL;
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
if (ip->ip_data_len > idr->idr_data_segment_len) {
|
|
icl_pdu_free(ip);
|
|
return (EMSGSIZE);
|
|
}
|
|
|
|
copyout(ip->ip_bhs, idr->idr_bhs, sizeof(*ip->ip_bhs));
|
|
if (ip->ip_data_len > 0) {
|
|
data = malloc(ip->ip_data_len, M_ISCSI, M_WAITOK);
|
|
icl_pdu_get_data(ip, 0, data, ip->ip_data_len);
|
|
copyout(data, idr->idr_data_segment, ip->ip_data_len);
|
|
free(data, M_ISCSI);
|
|
}
|
|
|
|
icl_pdu_free(ip);
|
|
|
|
return (0);
|
|
}
|
|
#endif /* ICL_KERNEL_PROXY */
|
|
|
|
static void
|
|
iscsi_sanitize_session_conf(struct iscsi_session_conf *isc)
|
|
{
|
|
/*
|
|
* Just make sure all the fields are null-terminated.
|
|
*
|
|
* XXX: This is not particularly secure. We should
|
|
* create our own conf and then copy in relevant
|
|
* fields.
|
|
*/
|
|
isc->isc_initiator[ISCSI_NAME_LEN - 1] = '\0';
|
|
isc->isc_initiator_addr[ISCSI_ADDR_LEN - 1] = '\0';
|
|
isc->isc_initiator_alias[ISCSI_ALIAS_LEN - 1] = '\0';
|
|
isc->isc_target[ISCSI_NAME_LEN - 1] = '\0';
|
|
isc->isc_target_addr[ISCSI_ADDR_LEN - 1] = '\0';
|
|
isc->isc_user[ISCSI_NAME_LEN - 1] = '\0';
|
|
isc->isc_secret[ISCSI_SECRET_LEN - 1] = '\0';
|
|
isc->isc_mutual_user[ISCSI_NAME_LEN - 1] = '\0';
|
|
isc->isc_mutual_secret[ISCSI_SECRET_LEN - 1] = '\0';
|
|
}
|
|
|
|
static bool
|
|
iscsi_valid_session_conf(const struct iscsi_session_conf *isc)
|
|
{
|
|
|
|
if (isc->isc_initiator[0] == '\0') {
|
|
ISCSI_DEBUG("empty isc_initiator");
|
|
return (false);
|
|
}
|
|
|
|
if (isc->isc_target_addr[0] == '\0') {
|
|
ISCSI_DEBUG("empty isc_target_addr");
|
|
return (false);
|
|
}
|
|
|
|
if (isc->isc_discovery != 0 && isc->isc_target[0] != 0) {
|
|
ISCSI_DEBUG("non-empty isc_target for discovery session");
|
|
return (false);
|
|
}
|
|
|
|
if (isc->isc_discovery == 0 && isc->isc_target[0] == 0) {
|
|
ISCSI_DEBUG("empty isc_target for non-discovery session");
|
|
return (false);
|
|
}
|
|
|
|
return (true);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_session_add(struct iscsi_softc *sc, struct iscsi_session_add *isa)
|
|
{
|
|
struct iscsi_session *is;
|
|
const struct iscsi_session *is2;
|
|
int error;
|
|
sbintime_t sbt, pr;
|
|
|
|
iscsi_sanitize_session_conf(&isa->isa_conf);
|
|
if (iscsi_valid_session_conf(&isa->isa_conf) == false)
|
|
return (EINVAL);
|
|
|
|
is = malloc(sizeof(*is), M_ISCSI, M_ZERO | M_WAITOK);
|
|
memcpy(&is->is_conf, &isa->isa_conf, sizeof(is->is_conf));
|
|
|
|
sx_xlock(&sc->sc_lock);
|
|
|
|
/*
|
|
* Prevent duplicates.
|
|
*/
|
|
TAILQ_FOREACH(is2, &sc->sc_sessions, is_next) {
|
|
if (!!is->is_conf.isc_discovery !=
|
|
!!is2->is_conf.isc_discovery)
|
|
continue;
|
|
|
|
if (strcmp(is->is_conf.isc_target_addr,
|
|
is2->is_conf.isc_target_addr) != 0)
|
|
continue;
|
|
|
|
if (is->is_conf.isc_discovery == 0 &&
|
|
strcmp(is->is_conf.isc_target,
|
|
is2->is_conf.isc_target) != 0)
|
|
continue;
|
|
|
|
sx_xunlock(&sc->sc_lock);
|
|
free(is, M_ISCSI);
|
|
return (EBUSY);
|
|
}
|
|
|
|
is->is_conn = icl_new_conn(is->is_conf.isc_offload,
|
|
is->is_conf.isc_iser, "iscsi", &is->is_lock);
|
|
if (is->is_conn == NULL) {
|
|
sx_xunlock(&sc->sc_lock);
|
|
free(is, M_ISCSI);
|
|
return (EINVAL);
|
|
}
|
|
is->is_conn->ic_receive = iscsi_receive_callback;
|
|
is->is_conn->ic_error = iscsi_error_callback;
|
|
is->is_conn->ic_prv0 = is;
|
|
TAILQ_INIT(&is->is_outstanding);
|
|
STAILQ_INIT(&is->is_postponed);
|
|
mtx_init(&is->is_lock, "iscsi_lock", NULL, MTX_DEF);
|
|
cv_init(&is->is_maintenance_cv, "iscsi_mt");
|
|
#ifdef ICL_KERNEL_PROXY
|
|
cv_init(&is->is_login_cv, "iscsi_login");
|
|
#endif
|
|
|
|
/*
|
|
* Set some default values, from RFC 3720, section 12.
|
|
*
|
|
* These values are updated by the handoff IOCTL, but are
|
|
* needed prior to the handoff to support sending the ISER
|
|
* login PDU.
|
|
*/
|
|
is->is_conn->ic_max_recv_data_segment_length = 8192;
|
|
is->is_conn->ic_max_send_data_segment_length = 8192;
|
|
is->is_max_burst_length = 262144;
|
|
is->is_first_burst_length = 65536;
|
|
|
|
is->is_softc = sc;
|
|
sc->sc_last_session_id++;
|
|
is->is_id = sc->sc_last_session_id;
|
|
is->is_isid[0] = 0x80; /* RFC 3720, 10.12.5: 10b, "Random" ISID. */
|
|
arc4rand(&is->is_isid[1], 5, 0);
|
|
is->is_tsih = 0;
|
|
callout_init(&is->is_callout, 1);
|
|
|
|
error = kthread_add(iscsi_maintenance_thread, is, NULL, NULL, 0, 0, "iscsimt");
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is, "kthread_add(9) failed with error %d", error);
|
|
sx_xunlock(&sc->sc_lock);
|
|
return (error);
|
|
}
|
|
is->is_ping_timeout = is->is_conf.isc_ping_timeout;
|
|
if (is->is_ping_timeout < 0)
|
|
is->is_ping_timeout = ping_timeout;
|
|
is->is_login_timeout = is->is_conf.isc_login_timeout;
|
|
if (is->is_login_timeout < 0)
|
|
is->is_login_timeout = login_timeout;
|
|
|
|
sbt = mstosbt(995);
|
|
pr = mstosbt(10);
|
|
callout_reset_sbt(&is->is_callout, sbt, pr, iscsi_callout, is, 0);
|
|
TAILQ_INSERT_TAIL(&sc->sc_sessions, is, is_next);
|
|
|
|
ISCSI_SESSION_LOCK(is);
|
|
/*
|
|
* Don't notify iscsid(8) if the session is disabled and it's not
|
|
* a discovery session,
|
|
*/
|
|
if (is->is_conf.isc_enable == 0 && is->is_conf.isc_discovery == 0) {
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
sx_xunlock(&sc->sc_lock);
|
|
return (0);
|
|
}
|
|
|
|
is->is_waiting_for_iscsid = true;
|
|
strlcpy(is->is_reason, "Waiting for iscsid(8)", sizeof(is->is_reason));
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
cv_signal(&sc->sc_cv);
|
|
sx_xunlock(&sc->sc_lock);
|
|
return (0);
|
|
}
|
|
|
|
static bool
|
|
iscsi_session_conf_matches(unsigned int id1, const struct iscsi_session_conf *c1,
|
|
unsigned int id2, const struct iscsi_session_conf *c2)
|
|
{
|
|
|
|
if (id2 != 0 && id2 != id1)
|
|
return (false);
|
|
if (c2->isc_target[0] != '\0' &&
|
|
strcmp(c1->isc_target, c2->isc_target) != 0)
|
|
return (false);
|
|
if (c2->isc_target_addr[0] != '\0' &&
|
|
strcmp(c1->isc_target_addr, c2->isc_target_addr) != 0)
|
|
return (false);
|
|
return (true);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_session_remove(struct iscsi_softc *sc,
|
|
struct iscsi_session_remove *isr)
|
|
{
|
|
struct iscsi_session *is, *tmp;
|
|
bool found = false;
|
|
|
|
iscsi_sanitize_session_conf(&isr->isr_conf);
|
|
|
|
sx_xlock(&sc->sc_lock);
|
|
TAILQ_FOREACH_SAFE(is, &sc->sc_sessions, is_next, tmp) {
|
|
ISCSI_SESSION_LOCK(is);
|
|
if (iscsi_session_conf_matches(is->is_id, &is->is_conf,
|
|
isr->isr_session_id, &isr->isr_conf)) {
|
|
found = true;
|
|
iscsi_session_logout(is);
|
|
iscsi_session_terminate(is);
|
|
}
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
}
|
|
sx_xunlock(&sc->sc_lock);
|
|
|
|
if (!found)
|
|
return (ESRCH);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_session_list(struct iscsi_softc *sc, struct iscsi_session_list *isl)
|
|
{
|
|
int error;
|
|
unsigned int i = 0;
|
|
struct iscsi_session *is;
|
|
struct iscsi_session_state iss;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
if (i >= isl->isl_nentries) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (EMSGSIZE);
|
|
}
|
|
memset(&iss, 0, sizeof(iss));
|
|
memcpy(&iss.iss_conf, &is->is_conf, sizeof(iss.iss_conf));
|
|
iss.iss_id = is->is_id;
|
|
strlcpy(iss.iss_target_alias, is->is_target_alias, sizeof(iss.iss_target_alias));
|
|
strlcpy(iss.iss_reason, is->is_reason, sizeof(iss.iss_reason));
|
|
strlcpy(iss.iss_offload, is->is_conn->ic_offload, sizeof(iss.iss_offload));
|
|
|
|
if (is->is_conn->ic_header_crc32c)
|
|
iss.iss_header_digest = ISCSI_DIGEST_CRC32C;
|
|
else
|
|
iss.iss_header_digest = ISCSI_DIGEST_NONE;
|
|
|
|
if (is->is_conn->ic_data_crc32c)
|
|
iss.iss_data_digest = ISCSI_DIGEST_CRC32C;
|
|
else
|
|
iss.iss_data_digest = ISCSI_DIGEST_NONE;
|
|
|
|
iss.iss_max_send_data_segment_length =
|
|
is->is_conn->ic_max_send_data_segment_length;
|
|
iss.iss_max_recv_data_segment_length =
|
|
is->is_conn->ic_max_recv_data_segment_length;
|
|
iss.iss_max_burst_length = is->is_max_burst_length;
|
|
iss.iss_first_burst_length = is->is_first_burst_length;
|
|
iss.iss_immediate_data = is->is_immediate_data;
|
|
iss.iss_connected = is->is_connected;
|
|
|
|
error = copyout(&iss, isl->isl_pstates + i, sizeof(iss));
|
|
if (error != 0) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (error);
|
|
}
|
|
i++;
|
|
}
|
|
sx_sunlock(&sc->sc_lock);
|
|
|
|
isl->isl_nentries = i;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl_session_modify(struct iscsi_softc *sc,
|
|
struct iscsi_session_modify *ism)
|
|
{
|
|
struct iscsi_session *is;
|
|
const struct iscsi_session *is2;
|
|
|
|
iscsi_sanitize_session_conf(&ism->ism_conf);
|
|
if (iscsi_valid_session_conf(&ism->ism_conf) == false)
|
|
return (EINVAL);
|
|
|
|
sx_xlock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
ISCSI_SESSION_LOCK(is);
|
|
if (is->is_id == ism->ism_session_id) {
|
|
/* Note that the session remains locked. */
|
|
break;
|
|
}
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
}
|
|
if (is == NULL) {
|
|
sx_xunlock(&sc->sc_lock);
|
|
return (ESRCH);
|
|
}
|
|
|
|
/*
|
|
* Prevent duplicates.
|
|
*/
|
|
TAILQ_FOREACH(is2, &sc->sc_sessions, is_next) {
|
|
if (is == is2)
|
|
continue;
|
|
|
|
if (!!ism->ism_conf.isc_discovery !=
|
|
!!is2->is_conf.isc_discovery)
|
|
continue;
|
|
|
|
if (strcmp(ism->ism_conf.isc_target_addr,
|
|
is2->is_conf.isc_target_addr) != 0)
|
|
continue;
|
|
|
|
if (ism->ism_conf.isc_discovery == 0 &&
|
|
strcmp(ism->ism_conf.isc_target,
|
|
is2->is_conf.isc_target) != 0)
|
|
continue;
|
|
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
sx_xunlock(&sc->sc_lock);
|
|
return (EBUSY);
|
|
}
|
|
|
|
sx_xunlock(&sc->sc_lock);
|
|
|
|
memcpy(&is->is_conf, &ism->ism_conf, sizeof(is->is_conf));
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
|
|
iscsi_session_reconnect(is);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int mode,
|
|
struct thread *td)
|
|
{
|
|
struct iscsi_softc *sc;
|
|
|
|
sc = dev->si_drv1;
|
|
|
|
switch (cmd) {
|
|
case ISCSIDWAIT:
|
|
return (iscsi_ioctl_daemon_wait(sc,
|
|
(struct iscsi_daemon_request *)arg, false));
|
|
#ifdef COMPAT_FREEBSD13
|
|
case ISCSIDWAIT13:
|
|
return (iscsi_ioctl_daemon_wait(sc,
|
|
(struct iscsi_daemon_request *)arg, true));
|
|
#endif
|
|
case ISCSIDLIMITS:
|
|
return (iscsi_ioctl_daemon_limits(sc,
|
|
(struct iscsi_daemon_limits *)arg));
|
|
case ISCSIDHANDOFF:
|
|
return (iscsi_ioctl_daemon_handoff(sc,
|
|
(struct iscsi_daemon_handoff *)arg));
|
|
case ISCSIDFAIL:
|
|
return (iscsi_ioctl_daemon_fail(sc,
|
|
(struct iscsi_daemon_fail *)arg));
|
|
#ifdef ICL_KERNEL_PROXY
|
|
case ISCSIDCONNECT:
|
|
return (iscsi_ioctl_daemon_connect(sc,
|
|
(struct iscsi_daemon_connect *)arg));
|
|
case ISCSIDSEND:
|
|
return (iscsi_ioctl_daemon_send(sc,
|
|
(struct iscsi_daemon_send *)arg));
|
|
case ISCSIDRECEIVE:
|
|
return (iscsi_ioctl_daemon_receive(sc,
|
|
(struct iscsi_daemon_receive *)arg));
|
|
#endif /* ICL_KERNEL_PROXY */
|
|
case ISCSISADD:
|
|
return (iscsi_ioctl_session_add(sc,
|
|
(struct iscsi_session_add *)arg));
|
|
case ISCSISREMOVE:
|
|
return (iscsi_ioctl_session_remove(sc,
|
|
(struct iscsi_session_remove *)arg));
|
|
case ISCSISLIST:
|
|
return (iscsi_ioctl_session_list(sc,
|
|
(struct iscsi_session_list *)arg));
|
|
case ISCSISMODIFY:
|
|
return (iscsi_ioctl_session_modify(sc,
|
|
(struct iscsi_session_modify *)arg));
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
|
|
static struct iscsi_outstanding *
|
|
iscsi_outstanding_find(struct iscsi_session *is, uint32_t initiator_task_tag)
|
|
{
|
|
struct iscsi_outstanding *io;
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
TAILQ_FOREACH(io, &is->is_outstanding, io_next) {
|
|
if (io->io_initiator_task_tag == initiator_task_tag)
|
|
return (io);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static struct iscsi_outstanding *
|
|
iscsi_outstanding_find_ccb(struct iscsi_session *is, union ccb *ccb)
|
|
{
|
|
struct iscsi_outstanding *io;
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
TAILQ_FOREACH(io, &is->is_outstanding, io_next) {
|
|
if (io->io_ccb == ccb)
|
|
return (io);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static struct iscsi_outstanding *
|
|
iscsi_outstanding_add(struct iscsi_session *is, struct icl_pdu *request,
|
|
union ccb *ccb, uint32_t *initiator_task_tagp)
|
|
{
|
|
struct iscsi_outstanding *io;
|
|
int error;
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
io = uma_zalloc(iscsi_outstanding_zone, M_NOWAIT | M_ZERO);
|
|
if (io == NULL) {
|
|
ISCSI_SESSION_WARN(is, "failed to allocate %zd bytes",
|
|
sizeof(*io));
|
|
return (NULL);
|
|
}
|
|
|
|
error = icl_conn_task_setup(is->is_conn, request, &ccb->csio,
|
|
initiator_task_tagp, &io->io_icl_prv);
|
|
if (error != 0) {
|
|
ISCSI_SESSION_WARN(is,
|
|
"icl_conn_task_setup() failed with error %d", error);
|
|
uma_zfree(iscsi_outstanding_zone, io);
|
|
return (NULL);
|
|
}
|
|
|
|
KASSERT(iscsi_outstanding_find(is, *initiator_task_tagp) == NULL,
|
|
("initiator_task_tag 0x%x already added", *initiator_task_tagp));
|
|
|
|
io->io_initiator_task_tag = *initiator_task_tagp;
|
|
io->io_ccb = ccb;
|
|
TAILQ_INSERT_TAIL(&is->is_outstanding, io, io_next);
|
|
return (io);
|
|
}
|
|
|
|
static void
|
|
iscsi_outstanding_remove(struct iscsi_session *is, struct iscsi_outstanding *io)
|
|
{
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
icl_conn_task_done(is->is_conn, io->io_icl_prv);
|
|
TAILQ_REMOVE(&is->is_outstanding, io, io_next);
|
|
uma_zfree(iscsi_outstanding_zone, io);
|
|
}
|
|
|
|
static void
|
|
iscsi_action_abort(struct iscsi_session *is, union ccb *ccb)
|
|
{
|
|
struct icl_pdu *request;
|
|
struct iscsi_bhs_task_management_request *bhstmr;
|
|
struct ccb_abort *cab = &ccb->cab;
|
|
struct iscsi_outstanding *io, *aio;
|
|
uint32_t initiator_task_tag;
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
#if 0
|
|
KASSERT(is->is_login_phase == false, ("%s called during Login Phase", __func__));
|
|
#else
|
|
if (is->is_login_phase) {
|
|
ccb->ccb_h.status = CAM_REQ_ABORTED;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
aio = iscsi_outstanding_find_ccb(is, cab->abort_ccb);
|
|
if (aio == NULL) {
|
|
ccb->ccb_h.status = CAM_REQ_CMP;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
|
|
request = icl_pdu_new(is->is_conn, M_NOWAIT);
|
|
if (request == NULL) {
|
|
ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
|
|
initiator_task_tag = is->is_initiator_task_tag++;
|
|
if (initiator_task_tag == 0xffffffff)
|
|
initiator_task_tag = is->is_initiator_task_tag++;
|
|
|
|
io = iscsi_outstanding_add(is, request, NULL, &initiator_task_tag);
|
|
if (io == NULL) {
|
|
icl_pdu_free(request);
|
|
ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
io->io_referenced_task_tag = aio->io_initiator_task_tag;
|
|
|
|
bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
|
|
bhstmr->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_REQUEST;
|
|
bhstmr->bhstmr_function = 0x80 | BHSTMR_FUNCTION_ABORT_TASK;
|
|
bhstmr->bhstmr_lun = htobe64(CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
|
|
bhstmr->bhstmr_initiator_task_tag = initiator_task_tag;
|
|
bhstmr->bhstmr_referenced_task_tag = aio->io_initiator_task_tag;
|
|
|
|
iscsi_pdu_queue_locked(request);
|
|
}
|
|
|
|
static void
|
|
iscsi_action_scsiio(struct iscsi_session *is, union ccb *ccb)
|
|
{
|
|
struct icl_pdu *request;
|
|
struct iscsi_bhs_scsi_command *bhssc;
|
|
struct ccb_scsiio *csio;
|
|
struct iscsi_outstanding *io;
|
|
size_t len;
|
|
uint32_t initiator_task_tag;
|
|
int error;
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
#if 0
|
|
KASSERT(is->is_login_phase == false, ("%s called during Login Phase", __func__));
|
|
#else
|
|
if (is->is_login_phase) {
|
|
ISCSI_SESSION_DEBUG(is, "called during login phase");
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_REQ_ABORTED | CAM_DEV_QFRZN;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
request = icl_pdu_new(is->is_conn, M_NOWAIT);
|
|
if (request == NULL) {
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_RESRC_UNAVAIL | CAM_DEV_QFRZN;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
|
|
initiator_task_tag = is->is_initiator_task_tag++;
|
|
if (initiator_task_tag == 0xffffffff)
|
|
initiator_task_tag = is->is_initiator_task_tag++;
|
|
|
|
io = iscsi_outstanding_add(is, request, ccb, &initiator_task_tag);
|
|
if (io == NULL) {
|
|
icl_pdu_free(request);
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_RESRC_UNAVAIL | CAM_DEV_QFRZN;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
|
|
csio = &ccb->csio;
|
|
bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
|
|
bhssc->bhssc_opcode = ISCSI_BHS_OPCODE_SCSI_COMMAND;
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_F;
|
|
switch (csio->ccb_h.flags & CAM_DIR_MASK) {
|
|
case CAM_DIR_IN:
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_R;
|
|
break;
|
|
case CAM_DIR_OUT:
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_W;
|
|
break;
|
|
}
|
|
|
|
if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
|
|
switch (csio->tag_action) {
|
|
case MSG_HEAD_OF_Q_TAG:
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_ATTR_HOQ;
|
|
break;
|
|
case MSG_ORDERED_Q_TAG:
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_ATTR_ORDERED;
|
|
break;
|
|
case MSG_ACA_TASK:
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_ATTR_ACA;
|
|
break;
|
|
case MSG_SIMPLE_Q_TAG:
|
|
default:
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_ATTR_SIMPLE;
|
|
break;
|
|
}
|
|
} else
|
|
bhssc->bhssc_flags |= BHSSC_FLAGS_ATTR_UNTAGGED;
|
|
|
|
if (is->is_protocol_level >= 2) {
|
|
bhssc->bhssc_pri = (csio->priority << BHSSC_PRI_SHIFT) &
|
|
BHSSC_PRI_MASK;
|
|
}
|
|
|
|
bhssc->bhssc_lun = htobe64(CAM_EXTLUN_BYTE_SWIZZLE(ccb->ccb_h.target_lun));
|
|
bhssc->bhssc_initiator_task_tag = initiator_task_tag;
|
|
bhssc->bhssc_expected_data_transfer_length = htonl(csio->dxfer_len);
|
|
KASSERT(csio->cdb_len <= sizeof(bhssc->bhssc_cdb),
|
|
("unsupported CDB size %zd", (size_t)csio->cdb_len));
|
|
|
|
if (csio->ccb_h.flags & CAM_CDB_POINTER)
|
|
memcpy(&bhssc->bhssc_cdb, csio->cdb_io.cdb_ptr, csio->cdb_len);
|
|
else
|
|
memcpy(&bhssc->bhssc_cdb, csio->cdb_io.cdb_bytes, csio->cdb_len);
|
|
|
|
if (is->is_immediate_data &&
|
|
(csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) {
|
|
len = csio->dxfer_len;
|
|
//ISCSI_SESSION_DEBUG(is, "adding %zd of immediate data", len);
|
|
if (len > is->is_first_burst_length) {
|
|
ISCSI_SESSION_DEBUG(is, "len %zd -> %d", len, is->is_first_burst_length);
|
|
len = is->is_first_burst_length;
|
|
}
|
|
if (len > is->is_conn->ic_max_send_data_segment_length) {
|
|
ISCSI_SESSION_DEBUG(is, "len %zd -> %d", len,
|
|
is->is_conn->ic_max_send_data_segment_length);
|
|
len = is->is_conn->ic_max_send_data_segment_length;
|
|
}
|
|
|
|
error = iscsi_pdu_append_data_csio(request, csio, 0, len,
|
|
M_NOWAIT | ICL_NOCOPY);
|
|
if (error != 0) {
|
|
iscsi_outstanding_remove(is, io);
|
|
icl_pdu_free(request);
|
|
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
|
|
xpt_freeze_devq(ccb->ccb_h.path, 1);
|
|
ISCSI_SESSION_DEBUG(is, "freezing devq");
|
|
}
|
|
ccb->ccb_h.status = CAM_RESRC_UNAVAIL | CAM_DEV_QFRZN;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
}
|
|
iscsi_pdu_queue_locked(request);
|
|
}
|
|
|
|
static void
|
|
iscsi_action(struct cam_sim *sim, union ccb *ccb)
|
|
{
|
|
struct iscsi_session *is;
|
|
|
|
is = cam_sim_softc(sim);
|
|
|
|
ISCSI_SESSION_LOCK_ASSERT(is);
|
|
|
|
if (is->is_terminating ||
|
|
(is->is_connected == false && fail_on_disconnection)) {
|
|
ccb->ccb_h.status = CAM_DEV_NOT_THERE;
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Make sure CAM doesn't sneak in a CCB just after freezing the queue.
|
|
*/
|
|
if (is->is_simq_frozen == true) {
|
|
ccb->ccb_h.status &= ~(CAM_SIM_QUEUED | CAM_STATUS_MASK);
|
|
ccb->ccb_h.status |= CAM_REQUEUE_REQ;
|
|
/* Don't freeze the devq - the SIM queue is already frozen. */
|
|
xpt_done(ccb);
|
|
return;
|
|
}
|
|
|
|
switch (ccb->ccb_h.func_code) {
|
|
case XPT_PATH_INQ:
|
|
{
|
|
struct ccb_pathinq *cpi = &ccb->cpi;
|
|
|
|
cpi->version_num = 1;
|
|
cpi->hba_inquiry = PI_TAG_ABLE;
|
|
cpi->target_sprt = 0;
|
|
cpi->hba_misc = PIM_EXTLUNS;
|
|
/*
|
|
* XXX: It shouldn't ever be NULL; this could be turned
|
|
* into a KASSERT eventually.
|
|
*/
|
|
if (is->is_conn == NULL)
|
|
ISCSI_WARN("NULL conn");
|
|
else if (is->is_conn->ic_unmapped)
|
|
cpi->hba_misc |= PIM_UNMAPPED;
|
|
cpi->hba_eng_cnt = 0;
|
|
cpi->max_target = 0;
|
|
/*
|
|
* Note that the variable below is only relevant for targets
|
|
* that don't claim compliance with anything above SPC2, which
|
|
* means they don't support REPORT_LUNS.
|
|
*/
|
|
cpi->max_lun = 255;
|
|
cpi->initiator_id = ~0;
|
|
strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
|
|
strlcpy(cpi->hba_vid, "iSCSI", HBA_IDLEN);
|
|
strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
|
|
cpi->unit_number = cam_sim_unit(sim);
|
|
cpi->bus_id = cam_sim_bus(sim);
|
|
cpi->base_transfer_speed = 150000; /* XXX */
|
|
cpi->transport = XPORT_ISCSI;
|
|
cpi->transport_version = 0;
|
|
cpi->protocol = PROTO_SCSI;
|
|
cpi->protocol_version = SCSI_REV_SPC3;
|
|
cpi->maxio = maxphys;
|
|
cpi->ccb_h.status = CAM_REQ_CMP;
|
|
break;
|
|
}
|
|
case XPT_GET_TRAN_SETTINGS:
|
|
{
|
|
struct ccb_trans_settings *cts;
|
|
struct ccb_trans_settings_scsi *scsi;
|
|
|
|
cts = &ccb->cts;
|
|
scsi = &cts->proto_specific.scsi;
|
|
|
|
cts->protocol = PROTO_SCSI;
|
|
cts->protocol_version = SCSI_REV_SPC3;
|
|
cts->transport = XPORT_ISCSI;
|
|
cts->transport_version = 0;
|
|
scsi->valid = CTS_SCSI_VALID_TQ;
|
|
scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
|
|
cts->ccb_h.status = CAM_REQ_CMP;
|
|
break;
|
|
}
|
|
case XPT_CALC_GEOMETRY:
|
|
cam_calc_geometry(&ccb->ccg, /*extended*/1);
|
|
ccb->ccb_h.status = CAM_REQ_CMP;
|
|
break;
|
|
#if 0
|
|
/*
|
|
* XXX: What's the point?
|
|
*/
|
|
case XPT_RESET_BUS:
|
|
case XPT_TERM_IO:
|
|
ISCSI_SESSION_DEBUG(is, "faking success for reset, abort, or term_io");
|
|
ccb->ccb_h.status = CAM_REQ_CMP;
|
|
break;
|
|
#endif
|
|
case XPT_ABORT:
|
|
iscsi_action_abort(is, ccb);
|
|
return;
|
|
case XPT_SCSI_IO:
|
|
iscsi_action_scsiio(is, ccb);
|
|
return;
|
|
default:
|
|
#if 0
|
|
ISCSI_SESSION_DEBUG(is, "got unsupported code 0x%x", ccb->ccb_h.func_code);
|
|
#endif
|
|
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
|
|
break;
|
|
}
|
|
xpt_done(ccb);
|
|
}
|
|
|
|
static void
|
|
iscsi_terminate_sessions(struct iscsi_softc *sc)
|
|
{
|
|
struct iscsi_session *is;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next)
|
|
iscsi_session_terminate(is);
|
|
while(!TAILQ_EMPTY(&sc->sc_sessions)) {
|
|
ISCSI_DEBUG("waiting for sessions to terminate");
|
|
cv_wait(&sc->sc_cv, &sc->sc_lock);
|
|
}
|
|
ISCSI_DEBUG("all sessions terminated");
|
|
sx_sunlock(&sc->sc_lock);
|
|
}
|
|
|
|
static void
|
|
iscsi_shutdown_pre(struct iscsi_softc *sc)
|
|
{
|
|
struct iscsi_session *is;
|
|
|
|
if (!fail_on_shutdown)
|
|
return;
|
|
|
|
/*
|
|
* If we have any sessions waiting for reconnection, request
|
|
* maintenance thread to fail them immediately instead of waiting
|
|
* for reconnect timeout.
|
|
*
|
|
* This prevents LUNs with mounted filesystems that are supported
|
|
* by disconnected iSCSI sessions from hanging, however it will
|
|
* fail all queued BIOs.
|
|
*/
|
|
ISCSI_DEBUG("forcing failing all disconnected sessions due to shutdown");
|
|
|
|
fail_on_disconnection = 1;
|
|
|
|
sx_slock(&sc->sc_lock);
|
|
TAILQ_FOREACH(is, &sc->sc_sessions, is_next) {
|
|
ISCSI_SESSION_LOCK(is);
|
|
if (!is->is_connected) {
|
|
ISCSI_SESSION_DEBUG(is, "force failing disconnected session early");
|
|
iscsi_session_reconnect(is);
|
|
}
|
|
ISCSI_SESSION_UNLOCK(is);
|
|
}
|
|
sx_sunlock(&sc->sc_lock);
|
|
}
|
|
|
|
static void
|
|
iscsi_shutdown_post(struct iscsi_softc *sc)
|
|
{
|
|
|
|
if (!KERNEL_PANICKED()) {
|
|
ISCSI_DEBUG("removing all sessions due to shutdown");
|
|
iscsi_terminate_sessions(sc);
|
|
}
|
|
}
|
|
|
|
static int
|
|
iscsi_load(void)
|
|
{
|
|
int error;
|
|
|
|
sc = malloc(sizeof(*sc), M_ISCSI, M_ZERO | M_WAITOK);
|
|
sx_init(&sc->sc_lock, "iscsi");
|
|
TAILQ_INIT(&sc->sc_sessions);
|
|
cv_init(&sc->sc_cv, "iscsi_cv");
|
|
|
|
iscsi_outstanding_zone = uma_zcreate("iscsi_outstanding",
|
|
sizeof(struct iscsi_outstanding), NULL, NULL, NULL, NULL,
|
|
UMA_ALIGN_PTR, 0);
|
|
|
|
error = make_dev_p(MAKEDEV_CHECKNAME, &sc->sc_cdev, &iscsi_cdevsw,
|
|
NULL, UID_ROOT, GID_WHEEL, 0600, "iscsi");
|
|
if (error != 0) {
|
|
ISCSI_WARN("failed to create device node, error %d", error);
|
|
return (error);
|
|
}
|
|
sc->sc_cdev->si_drv1 = sc;
|
|
|
|
sc->sc_shutdown_pre_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync,
|
|
iscsi_shutdown_pre, sc, SHUTDOWN_PRI_FIRST);
|
|
/*
|
|
* shutdown_post_sync needs to run after filesystem shutdown and before
|
|
* CAM shutdown - otherwise when rebooting with an iSCSI session that is
|
|
* disconnected but has outstanding requests, dashutdown() will hang on
|
|
* cam_periph_runccb().
|
|
*/
|
|
sc->sc_shutdown_post_eh = EVENTHANDLER_REGISTER(shutdown_post_sync,
|
|
iscsi_shutdown_post, sc, SHUTDOWN_PRI_DEFAULT - 1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_unload(void)
|
|
{
|
|
|
|
/* Awaken any threads asleep in iscsi_ioctl(). */
|
|
sx_xlock(&sc->sc_lock);
|
|
sc->sc_unloading = true;
|
|
cv_signal(&sc->sc_cv);
|
|
sx_xunlock(&sc->sc_lock);
|
|
|
|
if (sc->sc_cdev != NULL) {
|
|
ISCSI_DEBUG("removing device node");
|
|
destroy_dev(sc->sc_cdev);
|
|
ISCSI_DEBUG("device node removed");
|
|
}
|
|
|
|
if (sc->sc_shutdown_pre_eh != NULL)
|
|
EVENTHANDLER_DEREGISTER(shutdown_pre_sync, sc->sc_shutdown_pre_eh);
|
|
if (sc->sc_shutdown_post_eh != NULL)
|
|
EVENTHANDLER_DEREGISTER(shutdown_post_sync, sc->sc_shutdown_post_eh);
|
|
|
|
iscsi_terminate_sessions(sc);
|
|
|
|
uma_zdestroy(iscsi_outstanding_zone);
|
|
sx_destroy(&sc->sc_lock);
|
|
cv_destroy(&sc->sc_cv);
|
|
free(sc, M_ISCSI);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_quiesce(void)
|
|
{
|
|
sx_slock(&sc->sc_lock);
|
|
if (!TAILQ_EMPTY(&sc->sc_sessions)) {
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (EBUSY);
|
|
}
|
|
sx_sunlock(&sc->sc_lock);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
iscsi_modevent(module_t mod, int what, void *arg)
|
|
{
|
|
int error;
|
|
|
|
switch (what) {
|
|
case MOD_LOAD:
|
|
error = iscsi_load();
|
|
break;
|
|
case MOD_UNLOAD:
|
|
error = iscsi_unload();
|
|
break;
|
|
case MOD_QUIESCE:
|
|
error = iscsi_quiesce();
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
moduledata_t iscsi_data = {
|
|
"iscsi",
|
|
iscsi_modevent,
|
|
0
|
|
};
|
|
|
|
DECLARE_MODULE(iscsi, iscsi_data, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
|
|
MODULE_DEPEND(iscsi, cam, 1, 1, 1);
|
|
MODULE_DEPEND(iscsi, icl, 1, 1, 1);
|