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/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2012 The FreeBSD Foundation * * This software was developed by Edward Tomasz Napierala under sponsorship * from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * CTL frontend for the iSCSI protocol. */ #include <sys/cdefs.h> #include <sys/param.h> #include <sys/capsicum.h> #include <sys/condvar.h> #include <sys/endian.h> #include <sys/file.h> #include <sys/kernel.h> #include <sys/kthread.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/module.h> #include <sys/mutex.h> #include <sys/queue.h> #include <sys/sbuf.h> #include <sys/socket.h> #include <sys/sysctl.h> #include <sys/systm.h> #include <sys/uio.h> #include <sys/unistd.h> #include <sys/nv.h> #include <sys/dnv.h> #include <vm/uma.h> #include <cam/scsi/scsi_all.h> #include <cam/scsi/scsi_da.h> #include <cam/ctl/ctl_io.h> #include <cam/ctl/ctl.h> #include <cam/ctl/ctl_backend.h> #include <cam/ctl/ctl_error.h> #include <cam/ctl/ctl_frontend.h> #include <cam/ctl/ctl_debug.h> #include <cam/ctl/ctl_ha.h> #include <cam/ctl/ctl_ioctl.h> #include <cam/ctl/ctl_private.h> #include <dev/iscsi/icl.h> #include <dev/iscsi/icl_wrappers.h> #include <dev/iscsi/iscsi_proto.h> #include <cam/ctl/ctl_frontend_iscsi.h> #ifdef ICL_KERNEL_PROXY #include <sys/socketvar.h> #endif #ifdef ICL_KERNEL_PROXY FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); #endif /* Used for internal nexus reset task. */ #define ISCSI_BHS_OPCODE_INTERNAL 0x3e static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); static uma_zone_t cfiscsi_data_wait_zone; SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "CAM Target Layer iSCSI Frontend"); static int debug = 1; SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, &debug, 1, "Enable debug messages"); static int ping_timeout = 5; SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); static int login_timeout = 60; SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); static int maxtags = 256; SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, &maxtags, 0, "Max number of requests queued by initiator"); #define CFISCSI_DEBUG(X, ...) \ do { \ if (debug > 1) { \ printf("%s: " X "\n", \ __func__, ## __VA_ARGS__); \ } \ } while (0) #define CFISCSI_WARN(X, ...) \ do { \ if (debug > 0) { \ printf("WARNING: %s: " X "\n", \ __func__, ## __VA_ARGS__); \ } \ } while (0) #define CFISCSI_SESSION_DEBUG(S, X, ...) \ do { \ if (debug > 1) { \ printf("%s: %s (%s): " X "\n", \ __func__, S->cs_initiator_addr, \ S->cs_initiator_name, ## __VA_ARGS__); \ } \ } while (0) #define CFISCSI_SESSION_WARN(S, X, ...) \ do { \ if (debug > 0) { \ printf("WARNING: %s (%s): " X "\n", \ S->cs_initiator_addr, \ S->cs_initiator_name, ## __VA_ARGS__); \ } \ } while (0) #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) struct cfiscsi_priv { void *request; uint32_t expdatasn; uint32_t r2tsn; }; #define PRIV(io) \ ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) #define PRIV_REQUEST(io) PRIV(io)->request #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn #define PRIV_R2TSN(io) PRIV(io)->r2tsn static int cfiscsi_init(void); static int cfiscsi_shutdown(void); static void cfiscsi_online(void *arg); static void cfiscsi_offline(void *arg); static int cfiscsi_info(void *arg, struct sbuf *sb); static int cfiscsi_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td); static void cfiscsi_datamove(union ctl_io *io); static void cfiscsi_datamove_in(union ctl_io *io); static void cfiscsi_datamove_out(union ctl_io *io); static void cfiscsi_done(union ctl_io *io); static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); static void cfiscsi_session_terminate(struct cfiscsi_session *cs); static struct cfiscsi_data_wait *cfiscsi_data_wait_new( struct cfiscsi_session *cs, union ctl_io *io, uint32_t initiator_task_tag, uint32_t *target_transfer_tagp); static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, struct cfiscsi_data_wait *cdw); static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag); static struct cfiscsi_target *cfiscsi_target_find_or_create( struct cfiscsi_softc *softc, const char *name, const char *alias, uint16_t tag); static void cfiscsi_target_release(struct cfiscsi_target *ct); static void cfiscsi_session_delete(struct cfiscsi_session *cs); static struct cfiscsi_softc cfiscsi_softc; static struct ctl_frontend cfiscsi_frontend = { .name = "iscsi", .init = cfiscsi_init, .ioctl = cfiscsi_ioctl, .shutdown = cfiscsi_shutdown, }; CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); static struct icl_pdu * cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) { return (icl_pdu_new(request->ip_conn, flags)); } static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) { const struct iscsi_bhs_scsi_command *bhssc; struct cfiscsi_session *cs; uint32_t cmdsn, curcmdsn; cs = PDU_SESSION(request); /* * Every incoming PDU - not just NOP-Out - 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. */ cs->cs_timeout = 0; /* * Immediate commands carry cmdsn, but it is neither incremented nor * verified. */ if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) return (false); /* * Data-Out PDUs don't contain CmdSN. */ if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) return (false); /* * We're only using fields common for all the request * (initiator -> target) PDUs. */ bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); /* * Increment session cmdsn and exit if we received the expected value. */ do { if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) return (false); } while (curcmdsn == cmdsn); /* * The target MUST silently ignore any non-immediate command outside * of this range. */ if (ISCSI_SNLT(cmdsn, curcmdsn) || ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " "while expected %u", cmdsn, curcmdsn); return (true); } /* * We don't support multiple connections now, so any discontinuity in * CmdSN means lost PDUs. Since we don't support PDU retransmission -- * terminate the connection. */ CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " "while expected %u; dropping connection", cmdsn, curcmdsn); cfiscsi_session_terminate(cs); return (true); } static void cfiscsi_pdu_handle(struct icl_pdu *request) { struct cfiscsi_session *cs; bool ignore; cs = PDU_SESSION(request); ignore = cfiscsi_pdu_update_cmdsn(request); if (ignore) { icl_pdu_free(request); return; } /* * Handle the PDU; this includes e.g. receiving the remaining * part of PDU and submitting the SCSI command to CTL * or queueing a reply. The handling routine is responsible * for freeing the PDU when it's no longer needed. */ switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { case ISCSI_BHS_OPCODE_NOP_OUT: cfiscsi_pdu_handle_nop_out(request); break; case ISCSI_BHS_OPCODE_SCSI_COMMAND: cfiscsi_pdu_handle_scsi_command(request); break; case ISCSI_BHS_OPCODE_TASK_REQUEST: cfiscsi_pdu_handle_task_request(request); break; case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: cfiscsi_pdu_handle_data_out(request); break; case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: cfiscsi_pdu_handle_logout_request(request); break; default: CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " "opcode 0x%x; dropping connection", request->ip_bhs->bhs_opcode); icl_pdu_free(request); cfiscsi_session_terminate(cs); } } static void cfiscsi_receive_callback(struct icl_pdu *request) { #ifdef ICL_KERNEL_PROXY struct cfiscsi_session *cs; cs = PDU_SESSION(request); if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { if (cs->cs_login_pdu == NULL) cs->cs_login_pdu = request; else icl_pdu_free(request); cv_signal(&cs->cs_login_cv); return; } #endif cfiscsi_pdu_handle(request); } static void cfiscsi_error_callback(struct icl_conn *ic) { struct cfiscsi_session *cs; cs = CONN_SESSION(ic); CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); cfiscsi_session_terminate(cs); } static int cfiscsi_pdu_prepare(struct icl_pdu *response) { struct cfiscsi_session *cs; struct iscsi_bhs_scsi_response *bhssr; bool advance_statsn = true; uint32_t cmdsn; cs = PDU_SESSION(response); CFISCSI_SESSION_LOCK_ASSERT(cs); /* * We're only using fields common for all the response * (target -> initiator) PDUs. */ bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; /* * 10.8.3: "The StatSN for this connection is not advanced * after this PDU is sent." */ if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) advance_statsn = false; /* * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, * StatSN for the connection is not advanced after this PDU is sent." */ if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && bhssr->bhssr_initiator_task_tag == 0xffffffff) advance_statsn = false; /* * See the comment below - StatSN is not meaningful and must * not be advanced. */ if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) advance_statsn = false; /* * 10.7.3: "The fields StatSN, Status, and Residual Count * only have meaningful content if the S bit is set to 1." */ if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || (bhssr->bhssr_flags & BHSDI_FLAGS_S)) bhssr->bhssr_statsn = htonl(cs->cs_statsn); cmdsn = cs->cs_cmdsn; bhssr->bhssr_expcmdsn = htonl(cmdsn); bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); if (advance_statsn) cs->cs_statsn++; return (0); } static void cfiscsi_pdu_queue(struct icl_pdu *response) { struct cfiscsi_session *cs; cs = PDU_SESSION(response); CFISCSI_SESSION_LOCK(cs); cfiscsi_pdu_prepare(response); icl_pdu_queue(response); CFISCSI_SESSION_UNLOCK(cs); } static void cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) { struct cfiscsi_session *cs = PDU_SESSION(response); CFISCSI_SESSION_LOCK(cs); cfiscsi_pdu_prepare(response); icl_pdu_queue_cb(response, cb); CFISCSI_SESSION_UNLOCK(cs); } static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) { struct cfiscsi_session *cs; struct iscsi_bhs_nop_out *bhsno; struct iscsi_bhs_nop_in *bhsni; struct icl_pdu *response; void *data = NULL; size_t datasize; int error; cs = PDU_SESSION(request); bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { /* * Nothing to do, iscsi_pdu_update_statsn() already * zeroed the timeout. */ icl_pdu_free(request); return; } datasize = icl_pdu_data_segment_length(request); if (datasize > 0) { data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); if (data == NULL) { CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " "dropping connection"); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } icl_pdu_get_data(request, 0, data, datasize); } response = cfiscsi_pdu_new_response(request, M_NOWAIT); if (response == NULL) { CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " "droppping connection"); free(data, M_CFISCSI); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; bhsni->bhsni_flags = 0x80; bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; bhsni->bhsni_target_transfer_tag = 0xffffffff; if (datasize > 0) { error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); if (error != 0) { CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " "dropping connection"); free(data, M_CFISCSI); icl_pdu_free(request); icl_pdu_free(response); cfiscsi_session_terminate(cs); return; } free(data, M_CFISCSI); } icl_pdu_free(request); cfiscsi_pdu_queue(response); } static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) { struct iscsi_bhs_scsi_command *bhssc; struct cfiscsi_session *cs; union ctl_io *io; int error; cs = PDU_SESSION(request); bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", // bhssc->bhssc_initiator_task_tag); if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { CFISCSI_SESSION_WARN(cs, "unsolicited data with " "ImmediateData=No; dropping connection"); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); ctl_zero_io(io); PRIV_REQUEST(io) = request; io->io_hdr.io_type = CTL_IO_SCSI; io->io_hdr.nexus.initid = cs->cs_ctl_initid; io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >> BHSSC_PRI_SHIFT; io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { case BHSSC_FLAGS_ATTR_UNTAGGED: io->scsiio.tag_type = CTL_TAG_UNTAGGED; break; case BHSSC_FLAGS_ATTR_SIMPLE: io->scsiio.tag_type = CTL_TAG_SIMPLE; break; case BHSSC_FLAGS_ATTR_ORDERED: io->scsiio.tag_type = CTL_TAG_ORDERED; break; case BHSSC_FLAGS_ATTR_HOQ: io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; break; case BHSSC_FLAGS_ATTR_ACA: io->scsiio.tag_type = CTL_TAG_ACA; break; default: io->scsiio.tag_type = CTL_TAG_UNTAGGED; CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); break; } io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); refcount_acquire(&cs->cs_outstanding_ctl_pdus); error = ctl_run(io); if (error != CTL_RETVAL_COMPLETE) { CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " "dropping connection", error); ctl_free_io(io); refcount_release(&cs->cs_outstanding_ctl_pdus); icl_pdu_free(request); cfiscsi_session_terminate(cs); } } static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request) { struct iscsi_bhs_task_management_request *bhstmr; struct iscsi_bhs_task_management_response *bhstmr2; struct icl_pdu *response; struct cfiscsi_session *cs; union ctl_io *io; int error; cs = PDU_SESSION(request); bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); ctl_zero_io(io); PRIV_REQUEST(io) = request; io->io_hdr.io_type = CTL_IO_TASK; io->io_hdr.nexus.initid = cs->cs_ctl_initid; io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ switch (bhstmr->bhstmr_function & ~0x80) { case BHSTMR_FUNCTION_ABORT_TASK: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); #endif io->taskio.task_action = CTL_TASK_ABORT_TASK; io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; break; case BHSTMR_FUNCTION_ABORT_TASK_SET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); #endif io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; break; case BHSTMR_FUNCTION_CLEAR_TASK_SET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); #endif io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; break; case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); #endif io->taskio.task_action = CTL_TASK_LUN_RESET; break; case BHSTMR_FUNCTION_TARGET_WARM_RESET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); #endif io->taskio.task_action = CTL_TASK_TARGET_RESET; break; case BHSTMR_FUNCTION_TARGET_COLD_RESET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); #endif io->taskio.task_action = CTL_TASK_TARGET_RESET; break; case BHSTMR_FUNCTION_QUERY_TASK: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); #endif io->taskio.task_action = CTL_TASK_QUERY_TASK; io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; break; case BHSTMR_FUNCTION_QUERY_TASK_SET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); #endif io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; break; case BHSTMR_FUNCTION_I_T_NEXUS_RESET: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); #endif io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; break; case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: #if 0 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); #endif io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; break; default: CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", bhstmr->bhstmr_function & ~0x80); ctl_free_io(io); response = cfiscsi_pdu_new_response(request, M_NOWAIT); if (response == NULL) { CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " "dropping connection"); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } bhstmr2 = (struct iscsi_bhs_task_management_response *) response->ip_bhs; bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; bhstmr2->bhstmr_flags = 0x80; bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; icl_pdu_free(request); cfiscsi_pdu_queue(response); return; } refcount_acquire(&cs->cs_outstanding_ctl_pdus); error = ctl_run(io); if (error != CTL_RETVAL_COMPLETE) { CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " "dropping connection", error); ctl_free_io(io); refcount_release(&cs->cs_outstanding_ctl_pdus); icl_pdu_free(request); cfiscsi_session_terminate(cs); } } static bool cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) { struct iscsi_bhs_data_out *bhsdo; struct cfiscsi_session *cs; struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; size_t copy_len, len, off, buffer_offset; int ctl_sg_count; union ctl_io *io; cs = PDU_SESSION(request); KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_DATA_OUT || (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_COMMAND, ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); /* * We're only using fields common for Data-Out and SCSI Command PDUs. */ bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; io = cdw->cdw_ctl_io; KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, ("CTL_FLAG_DATA_IN")); #if 0 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", request->ip_data_len, io->scsiio.kern_total_len); #endif if (io->scsiio.kern_sg_entries > 0) { ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; ctl_sg_count = io->scsiio.kern_sg_entries; } else { ctl_sglist = &ctl_sg_entry; ctl_sglist->addr = io->scsiio.kern_data_ptr; ctl_sglist->len = io->scsiio.kern_data_len; ctl_sg_count = 1; } if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); else buffer_offset = 0; len = icl_pdu_data_segment_length(request); /* * Make sure the offset, as sent by the initiator, matches the offset * we're supposed to be at in the scatter-gather list. */ if (buffer_offset > io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || buffer_offset + len <= io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " "expected %zd; dropping connection", buffer_offset, (size_t)io->scsiio.kern_rel_offset + (size_t)io->scsiio.ext_data_filled); ctl_set_data_phase_error(&io->scsiio); cfiscsi_session_terminate(cs); return (true); } /* * This is the offset within the PDU data segment, as opposed * to buffer_offset, which is the offset within the task (SCSI * command). */ off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - buffer_offset; /* * Iterate over the scatter/gather segments, filling them with data * from the PDU data segment. Note that this can get called multiple * times for one SCSI command; the cdw structure holds state for the * scatter/gather list. */ for (;;) { KASSERT(cdw->cdw_sg_index < ctl_sg_count, ("cdw->cdw_sg_index >= ctl_sg_count")); if (cdw->cdw_sg_len == 0) { cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; } KASSERT(off <= len, ("len > off")); copy_len = len - off; if (copy_len > cdw->cdw_sg_len) copy_len = cdw->cdw_sg_len; icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); cdw->cdw_sg_addr += copy_len; cdw->cdw_sg_len -= copy_len; off += copy_len; io->scsiio.ext_data_filled += copy_len; io->scsiio.kern_data_resid -= copy_len; if (cdw->cdw_sg_len == 0) { /* * End of current segment. */ if (cdw->cdw_sg_index == ctl_sg_count - 1) { /* * Last segment in scatter/gather list. */ break; } cdw->cdw_sg_index++; } if (off == len) { /* * End of PDU payload. */ break; } } if (len > off) { /* * In case of unsolicited data, it's possible that the buffer * provided by CTL is smaller than negotiated FirstBurstLength. * Just ignore the superfluous data; will ask for them with R2T * on next call to cfiscsi_datamove(). * * This obviously can only happen with SCSI Command PDU. */ if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_COMMAND) return (true); CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " "expected %zd; dropping connection", icl_pdu_data_segment_length(request), off); ctl_set_data_phase_error(&io->scsiio); cfiscsi_session_terminate(cs); return (true); } if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { CFISCSI_SESSION_WARN(cs, "got the final packet without " "the F flag; flags = 0x%x; dropping connection", bhsdo->bhsdo_flags); ctl_set_data_phase_error(&io->scsiio); cfiscsi_session_terminate(cs); return (true); } if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { CFISCSI_SESSION_WARN(cs, "got the final packet, but the " "transmitted size was %zd bytes instead of %d; " "dropping connection", (size_t)io->scsiio.ext_data_filled, cdw->cdw_r2t_end); ctl_set_data_phase_error(&io->scsiio); cfiscsi_session_terminate(cs); return (true); } else { /* * For SCSI Command PDU, this just means we need to * solicit more data by sending R2T. */ return (false); } } if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { #if 0 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " "transfer tag 0x%x", cdw->cdw_target_transfer_tag); #endif return (true); } return (false); } static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request) { struct iscsi_bhs_data_out *bhsdo; struct cfiscsi_session *cs; struct cfiscsi_data_wait *cdw = NULL; union ctl_io *io; bool done; cs = PDU_SESSION(request); bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; CFISCSI_SESSION_LOCK(cs); TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { #if 0 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " "ttt 0x%x, itt 0x%x", bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag, cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); #endif if (bhsdo->bhsdo_target_transfer_tag == cdw->cdw_target_transfer_tag) break; } CFISCSI_SESSION_UNLOCK(cs); if (cdw == NULL) { CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " "0x%x, not found; dropping connection", bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " "DataSN %u, while expected %u; dropping connection", ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } cdw->cdw_datasn += request->ip_additional_pdus + 1; io = cdw->cdw_ctl_io; KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, ("CTL_FLAG_DATA_IN")); done = cfiscsi_handle_data_segment(request, cdw); if (done) { CFISCSI_SESSION_LOCK(cs); TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); CFISCSI_SESSION_UNLOCK(cs); done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || io->scsiio.ext_data_filled == io->scsiio.kern_data_len); cfiscsi_data_wait_free(cs, cdw); io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; if (done) ctl_datamove_done(io, false); else cfiscsi_datamove_out(io); } icl_pdu_free(request); } static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) { struct iscsi_bhs_logout_request *bhslr; struct iscsi_bhs_logout_response *bhslr2; struct icl_pdu *response; struct cfiscsi_session *cs; cs = PDU_SESSION(request); bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; switch (bhslr->bhslr_reason & 0x7f) { case BHSLR_REASON_CLOSE_SESSION: case BHSLR_REASON_CLOSE_CONNECTION: response = cfiscsi_pdu_new_response(request, M_NOWAIT); if (response == NULL) { CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; bhslr2->bhslr_flags = 0x80; bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag; icl_pdu_free(request); cfiscsi_pdu_queue(response); cfiscsi_session_terminate(cs); break; case BHSLR_REASON_REMOVE_FOR_RECOVERY: response = cfiscsi_pdu_new_response(request, M_NOWAIT); if (response == NULL) { CFISCSI_SESSION_WARN(cs, "failed to allocate memory; dropping connection"); icl_pdu_free(request); cfiscsi_session_terminate(cs); return; } bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; bhslr2->bhslr_flags = 0x80; bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag; icl_pdu_free(request); cfiscsi_pdu_queue(response); break; default: CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", bhslr->bhslr_reason); icl_pdu_free(request); cfiscsi_session_terminate(cs); break; } } static void cfiscsi_callout(void *context) { struct icl_pdu *cp; struct iscsi_bhs_nop_in *bhsni; struct cfiscsi_session *cs; cs = context; if (cs->cs_terminating) return; callout_schedule(&cs->cs_callout, 1 * hz); atomic_add_int(&cs->cs_timeout, 1); #ifdef ICL_KERNEL_PROXY if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { if (login_timeout > 0 && cs->cs_timeout > login_timeout) { CFISCSI_SESSION_WARN(cs, "login timed out after " "%d seconds; dropping connection", cs->cs_timeout); cfiscsi_session_terminate(cs); } return; } #endif if (ping_timeout <= 0) { /* * Pings are disabled. Don't send NOP-In in this case; * user might have disabled pings to work around problems * with certain initiators that can't properly handle * NOP-In, such as iPXE. Reset the timeout, to avoid * triggering reconnection, should the user decide to * reenable them. */ cs->cs_timeout = 0; return; } if (cs->cs_timeout >= ping_timeout) { CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " "dropping connection", ping_timeout); cfiscsi_session_terminate(cs); return; } /* * 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 (cs->cs_timeout < 2) return; cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); if (cp == NULL) { CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); return; } bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; bhsni->bhsni_flags = 0x80; bhsni->bhsni_initiator_task_tag = 0xffffffff; cfiscsi_pdu_queue(cp); } static struct cfiscsi_data_wait * cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) { struct cfiscsi_data_wait *cdw; int error; cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); if (cdw == NULL) { CFISCSI_SESSION_WARN(cs, "failed to allocate %zd bytes", sizeof(*cdw)); return (NULL); } error = icl_conn_transfer_setup(cs->cs_conn, PRIV_REQUEST(io), io, target_transfer_tagp, &cdw->cdw_icl_prv); if (error != 0) { CFISCSI_SESSION_WARN(cs, "icl_conn_transfer_setup() failed with error %d", error); uma_zfree(cfiscsi_data_wait_zone, cdw); return (NULL); } cdw->cdw_ctl_io = io; cdw->cdw_target_transfer_tag = *target_transfer_tagp; cdw->cdw_initiator_task_tag = initiator_task_tag; return (cdw); } static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, struct cfiscsi_data_wait *cdw) { icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); uma_zfree(cfiscsi_data_wait_zone, cdw); } static void cfiscsi_data_wait_abort(struct cfiscsi_session *cs, struct cfiscsi_data_wait *cdw, int status) { union ctl_io *cdw_io; /* * Set nonzero port status; this prevents backends from * assuming that the data transfer actually succeeded * and writing uninitialized data to disk. */ MPASS(status != 0); cdw_io = cdw->cdw_ctl_io; cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; cdw_io->scsiio.io_hdr.port_status = status; cfiscsi_data_wait_free(cs, cdw); ctl_datamove_done(cdw_io, false); } static void cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) { struct cfiscsi_data_wait *cdw; struct icl_pdu *ip; union ctl_io *io; int error, last, wait; if (cs->cs_target == NULL) return; /* No target yet, so nothing to do. */ ip = icl_pdu_new(cs->cs_conn, M_WAITOK); ip->ip_bhs->bhs_opcode = ISCSI_BHS_OPCODE_INTERNAL; io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); ctl_zero_io(io); PRIV_REQUEST(io) = ip; io->io_hdr.io_type = CTL_IO_TASK; io->io_hdr.nexus.initid = cs->cs_ctl_initid; io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; io->io_hdr.nexus.targ_lun = 0; io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; wait = cs->cs_outstanding_ctl_pdus; refcount_acquire(&cs->cs_outstanding_ctl_pdus); error = ctl_run(io); if (error != CTL_RETVAL_COMPLETE) { CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error); refcount_release(&cs->cs_outstanding_ctl_pdus); ctl_free_io(io); icl_pdu_free(ip); } CFISCSI_SESSION_LOCK(cs); cs->cs_terminating_tasks = true; while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); CFISCSI_SESSION_UNLOCK(cs); cfiscsi_data_wait_abort(cs, cdw, 42); CFISCSI_SESSION_LOCK(cs); } CFISCSI_SESSION_UNLOCK(cs); /* * Wait for CTL to terminate all the tasks. */ if (wait > 0) CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate %d tasks", wait); for (;;) { refcount_acquire(&cs->cs_outstanding_ctl_pdus); last = refcount_release(&cs->cs_outstanding_ctl_pdus); if (last != 0) break; tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 0, "cfiscsi_terminate", hz / 100); } if (wait > 0) CFISCSI_SESSION_WARN(cs, "tasks terminated"); } static void cfiscsi_maintenance_thread(void *arg) { struct cfiscsi_session *cs; cs = arg; for (;;) { CFISCSI_SESSION_LOCK(cs); if (cs->cs_terminating == false || cs->cs_handoff_in_progress) cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); CFISCSI_SESSION_UNLOCK(cs); if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { /* * We used to wait up to 30 seconds to deliver queued * PDUs to the initiator. We also tried hard to deliver * SCSI Responses for the aborted PDUs. We don't do * that anymore. We might need to revisit that. */ callout_drain(&cs->cs_callout); icl_conn_close(cs->cs_conn); /* * At this point ICL receive thread is no longer * running; no new tasks can be queued. */ cfiscsi_session_terminate_tasks(cs); cfiscsi_session_delete(cs); kthread_exit(); return; } CFISCSI_SESSION_DEBUG(cs, "nothing to do"); } } static void cfiscsi_session_terminate(struct cfiscsi_session *cs) { cs->cs_terminating = true; cv_signal(&cs->cs_maintenance_cv); #ifdef ICL_KERNEL_PROXY cv_signal(&cs->cs_login_cv); #endif } static int cfiscsi_session_register_initiator(struct cfiscsi_session *cs) { struct cfiscsi_target *ct; char *name; int i; KASSERT(cs->cs_ctl_initid == -1, ("already registered")); ct = cs->cs_target; name = strdup(cs->cs_initiator_id, M_CTL); i = ctl_add_initiator(&ct->ct_port, -1, 0, name); if (i < 0) { CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", i); cs->cs_ctl_initid = -1; return (1); } cs->cs_ctl_initid = i; #if 0 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); #endif return (0); } static void cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) { int error; if (cs->cs_ctl_initid == -1) return; error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); if (error != 0) { CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", error); } cs->cs_ctl_initid = -1; } static struct cfiscsi_session * cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) { struct cfiscsi_session *cs; int error; cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); if (cs == NULL) { CFISCSI_WARN("malloc failed"); return (NULL); } cs->cs_ctl_initid = -1; refcount_init(&cs->cs_outstanding_ctl_pdus, 0); TAILQ_INIT(&cs->cs_waiting_for_data_out); mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); #ifdef ICL_KERNEL_PROXY cv_init(&cs->cs_login_cv, "cfiscsi_login"); #endif /* * The purpose of this is to avoid racing with session shutdown. * Otherwise we could have the maintenance thread call icl_conn_close() * before we call icl_conn_handoff(). */ cs->cs_handoff_in_progress = true; cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); if (cs->cs_conn == NULL) { free(cs, M_CFISCSI); return (NULL); } cs->cs_conn->ic_receive = cfiscsi_receive_callback; cs->cs_conn->ic_error = cfiscsi_error_callback; cs->cs_conn->ic_prv0 = cs; error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); if (error != 0) { CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); free(cs, M_CFISCSI); return (NULL); } mtx_lock(&softc->lock); cs->cs_id = ++softc->last_session_id; TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); mtx_unlock(&softc->lock); /* * Start pinging the initiator. */ callout_init(&cs->cs_callout, 1); callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); return (cs); } static void cfiscsi_session_delete(struct cfiscsi_session *cs) { struct cfiscsi_softc *softc; softc = &cfiscsi_softc; KASSERT(cs->cs_outstanding_ctl_pdus == 0, ("destroying session with outstanding CTL pdus")); KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), ("destroying session with non-empty queue")); mtx_lock(&softc->lock); TAILQ_REMOVE(&softc->sessions, cs, cs_next); mtx_unlock(&softc->lock); cfiscsi_session_unregister_initiator(cs); if (cs->cs_target != NULL) cfiscsi_target_release(cs->cs_target); icl_conn_close(cs->cs_conn); icl_conn_free(cs->cs_conn); free(cs, M_CFISCSI); cv_signal(&softc->sessions_cv); } static int cfiscsi_init(void) { struct cfiscsi_softc *softc; softc = &cfiscsi_softc; bzero(softc, sizeof(*softc)); mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); cv_init(&softc->sessions_cv, "cfiscsi_sessions"); #ifdef ICL_KERNEL_PROXY cv_init(&softc->accept_cv, "cfiscsi_accept"); #endif TAILQ_INIT(&softc->sessions); TAILQ_INIT(&softc->targets); cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); return (0); } static int cfiscsi_shutdown(void) { struct cfiscsi_softc *softc = &cfiscsi_softc; if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) return (EBUSY); uma_zdestroy(cfiscsi_data_wait_zone); #ifdef ICL_KERNEL_PROXY cv_destroy(&softc->accept_cv); #endif cv_destroy(&softc->sessions_cv); mtx_destroy(&softc->lock); return (0); } #ifdef ICL_KERNEL_PROXY static void cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) { struct cfiscsi_session *cs; cs = cfiscsi_session_new(&cfiscsi_softc, NULL); if (cs == NULL) { CFISCSI_WARN("failed to create session"); return; } icl_conn_handoff_sock(cs->cs_conn, so); cs->cs_initiator_sa = sa; cs->cs_portal_id = portal_id; cs->cs_handoff_in_progress = false; cs->cs_waiting_for_ctld = true; cv_signal(&cfiscsi_softc.accept_cv); CFISCSI_SESSION_LOCK(cs); /* * Wake up the maintenance thread if we got scheduled for termination * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). */ if (cs->cs_terminating) cfiscsi_session_terminate(cs); CFISCSI_SESSION_UNLOCK(cs); } #endif static void cfiscsi_online(void *arg) { struct cfiscsi_softc *softc; struct cfiscsi_target *ct; int online; ct = (struct cfiscsi_target *)arg; softc = ct->ct_softc; mtx_lock(&softc->lock); if (ct->ct_online) { mtx_unlock(&softc->lock); return; } ct->ct_online = 1; online = softc->online++; mtx_unlock(&softc->lock); if (online > 0) return; #ifdef ICL_KERNEL_PROXY if (softc->listener != NULL) icl_listen_free(softc->listener); softc->listener = icl_listen_new(cfiscsi_accept); #endif } static void cfiscsi_offline(void *arg) { struct cfiscsi_softc *softc; struct cfiscsi_target *ct; struct cfiscsi_session *cs; int error, online; ct = (struct cfiscsi_target *)arg; softc = ct->ct_softc; mtx_lock(&softc->lock); if (!ct->ct_online) { mtx_unlock(&softc->lock); return; } ct->ct_online = 0; online = --softc->online; do { TAILQ_FOREACH(cs, &softc->sessions, cs_next) { if (cs->cs_target == ct) cfiscsi_session_terminate(cs); } TAILQ_FOREACH(cs, &softc->sessions, cs_next) { if (cs->cs_target == ct) break; } if (cs != NULL) { error = cv_wait_sig(&softc->sessions_cv, &softc->lock); if (error != 0) { CFISCSI_SESSION_DEBUG(cs, "cv_wait failed with error %d\n", error); break; } } } while (cs != NULL && ct->ct_online == 0); mtx_unlock(&softc->lock); if (online > 0) return; #ifdef ICL_KERNEL_PROXY icl_listen_free(softc->listener); softc->listener = NULL; #endif } static int cfiscsi_info(void *arg, struct sbuf *sb) { struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; int retval; retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", ct->ct_state); return (retval); } static void cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) { struct cfiscsi_softc *softc; struct cfiscsi_session *cs, *cs2; struct cfiscsi_target *ct; struct ctl_iscsi_handoff_params *cihp; int error; cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); softc = &cfiscsi_softc; CFISCSI_DEBUG("new connection from %s (%s) to %s", cihp->initiator_name, cihp->initiator_addr, cihp->target_name); ct = cfiscsi_target_find(softc, cihp->target_name, cihp->portal_group_tag); if (ct == NULL) { ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: target not found", __func__); return; } #ifdef ICL_KERNEL_PROXY if (cihp->socket > 0 && cihp->connection_id > 0) { snprintf(ci->error_str, sizeof(ci->error_str), "both socket and connection_id set"); ci->status = CTL_ISCSI_ERROR; cfiscsi_target_release(ct); return; } if (cihp->socket == 0) { mtx_lock(&cfiscsi_softc.lock); TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { if (cs->cs_id == cihp->connection_id) break; } if (cs == NULL) { mtx_unlock(&cfiscsi_softc.lock); snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); ci->status = CTL_ISCSI_ERROR; cfiscsi_target_release(ct); return; } mtx_unlock(&cfiscsi_softc.lock); } else { #endif cs = cfiscsi_session_new(softc, cihp->offload); if (cs == NULL) { ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: cfiscsi_session_new failed", __func__); cfiscsi_target_release(ct); return; } #ifdef ICL_KERNEL_PROXY } #endif /* * First PDU of Full Feature phase has the same CmdSN as the last * PDU from the Login Phase received from the initiator. Thus, * the -1 below. */ cs->cs_cmdsn = cihp->cmdsn; cs->cs_statsn = cihp->statsn; cs->cs_conn->ic_max_recv_data_segment_length = cihp->max_recv_data_segment_length; cs->cs_conn->ic_max_send_data_segment_length = cihp->max_send_data_segment_length; cs->cs_max_burst_length = cihp->max_burst_length; cs->cs_first_burst_length = cihp->first_burst_length; cs->cs_immediate_data = !!cihp->immediate_data; if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) cs->cs_conn->ic_header_crc32c = true; if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) cs->cs_conn->ic_data_crc32c = true; strlcpy(cs->cs_initiator_name, cihp->initiator_name, sizeof(cs->cs_initiator_name)); strlcpy(cs->cs_initiator_addr, cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); strlcpy(cs->cs_initiator_alias, cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); memcpy(cs->cs_initiator_isid, cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, cihp->initiator_isid[0], cihp->initiator_isid[1], cihp->initiator_isid[2], cihp->initiator_isid[3], cihp->initiator_isid[4], cihp->initiator_isid[5]); mtx_lock(&softc->lock); if (ct->ct_online == 0) { mtx_unlock(&softc->lock); CFISCSI_SESSION_LOCK(cs); cs->cs_handoff_in_progress = false; cfiscsi_session_terminate(cs); CFISCSI_SESSION_UNLOCK(cs); cfiscsi_target_release(ct); ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: port offline", __func__); return; } cs->cs_target = ct; mtx_unlock(&softc->lock); restart: if (!cs->cs_terminating) { mtx_lock(&softc->lock); TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { if (cs2 != cs && cs2->cs_tasks_aborted == false && cs->cs_target == cs2->cs_target && strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { if (strcmp(cs->cs_initiator_addr, cs2->cs_initiator_addr) != 0) { CFISCSI_SESSION_WARN(cs2, "session reinstatement from " "different address %s", cs->cs_initiator_addr); } else { CFISCSI_SESSION_DEBUG(cs2, "session reinstatement"); } cfiscsi_session_terminate(cs2); mtx_unlock(&softc->lock); pause("cfiscsi_reinstate", 1); goto restart; } } mtx_unlock(&softc->lock); } /* * Register initiator with CTL. */ cfiscsi_session_register_initiator(cs); #ifdef ICL_KERNEL_PROXY if (cihp->socket > 0) { #endif error = icl_conn_handoff(cs->cs_conn, cihp->socket); if (error != 0) { CFISCSI_SESSION_LOCK(cs); cs->cs_handoff_in_progress = false; cfiscsi_session_terminate(cs); CFISCSI_SESSION_UNLOCK(cs); ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: icl_conn_handoff failed with error %d", __func__, error); return; } #ifdef ICL_KERNEL_PROXY } #endif #ifdef ICL_KERNEL_PROXY cs->cs_login_phase = false; /* * First PDU of the Full Feature phase has likely already arrived. * We have to pick it up and execute properly. */ if (cs->cs_login_pdu != NULL) { CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); cfiscsi_pdu_handle(cs->cs_login_pdu); cs->cs_login_pdu = NULL; } #endif CFISCSI_SESSION_LOCK(cs); cs->cs_handoff_in_progress = false; /* * Wake up the maintenance thread if we got scheduled for termination. */ if (cs->cs_terminating) cfiscsi_session_terminate(cs); CFISCSI_SESSION_UNLOCK(cs); ci->status = CTL_ISCSI_OK; } static void cfiscsi_ioctl_list(struct ctl_iscsi *ci) { struct ctl_iscsi_list_params *cilp; struct cfiscsi_session *cs; struct cfiscsi_softc *softc; struct sbuf *sb; int error; cilp = (struct ctl_iscsi_list_params *)&(ci->data); softc = &cfiscsi_softc; sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); if (sb == NULL) { ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "Unable to allocate %d bytes for iSCSI session list", cilp->alloc_len); return; } sbuf_printf(sb, "<ctlislist>\n"); mtx_lock(&softc->lock); TAILQ_FOREACH(cs, &softc->sessions, cs_next) { if (cs->cs_target == NULL) continue; error = sbuf_printf(sb, "<connection id=\"%d\">" "<initiator>%s</initiator>" "<initiator_addr>%s</initiator_addr>" "<initiator_alias>%s</initiator_alias>" "<target>%s</target>" "<target_alias>%s</target_alias>" "<target_portal_group_tag>%u</target_portal_group_tag>" "<header_digest>%s</header_digest>" "<data_digest>%s</data_digest>" "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" "<max_send_data_segment_length>%d</max_send_data_segment_length>" "<max_burst_length>%d</max_burst_length>" "<first_burst_length>%d</first_burst_length>" "<immediate_data>%d</immediate_data>" "<iser>%d</iser>" "<offload>%s</offload>" "</connection>\n", cs->cs_id, cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, cs->cs_target->ct_name, cs->cs_target->ct_alias, cs->cs_target->ct_tag, cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", cs->cs_conn->ic_max_recv_data_segment_length, cs->cs_conn->ic_max_send_data_segment_length, cs->cs_max_burst_length, cs->cs_first_burst_length, cs->cs_immediate_data, cs->cs_conn->ic_iser, cs->cs_conn->ic_offload); if (error != 0) break; } mtx_unlock(&softc->lock); error = sbuf_printf(sb, "</ctlislist>\n"); if (error != 0) { sbuf_delete(sb); ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; snprintf(ci->error_str, sizeof(ci->error_str), "Out of space, %d bytes is too small", cilp->alloc_len); return; } sbuf_finish(sb); error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); if (error != 0) { sbuf_delete(sb); snprintf(ci->error_str, sizeof(ci->error_str), "copyout failed with error %d", error); ci->status = CTL_ISCSI_ERROR; return; } cilp->fill_len = sbuf_len(sb) + 1; ci->status = CTL_ISCSI_OK; sbuf_delete(sb); } static void cfiscsi_ioctl_logout(struct ctl_iscsi *ci) { struct icl_pdu *response; struct iscsi_bhs_asynchronous_message *bhsam; struct ctl_iscsi_logout_params *cilp; struct cfiscsi_session *cs; struct cfiscsi_softc *softc; int found = 0; cilp = (struct ctl_iscsi_logout_params *)&(ci->data); softc = &cfiscsi_softc; mtx_lock(&softc->lock); TAILQ_FOREACH(cs, &softc->sessions, cs_next) { if (cilp->all == 0 && cs->cs_id != cilp->connection_id && strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) continue; response = icl_pdu_new(cs->cs_conn, M_NOWAIT); if (response == NULL) { ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "Unable to allocate memory"); mtx_unlock(&softc->lock); return; } bhsam = (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; bhsam->bhsam_flags = 0x80; bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; bhsam->bhsam_parameter3 = htons(10); cfiscsi_pdu_queue(response); found++; } mtx_unlock(&softc->lock); if (found == 0) { ci->status = CTL_ISCSI_SESSION_NOT_FOUND; snprintf(ci->error_str, sizeof(ci->error_str), "No matching connections found"); return; } ci->status = CTL_ISCSI_OK; } static void cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) { struct icl_pdu *response; struct iscsi_bhs_asynchronous_message *bhsam; struct ctl_iscsi_terminate_params *citp; struct cfiscsi_session *cs; struct cfiscsi_softc *softc; int found = 0; citp = (struct ctl_iscsi_terminate_params *)&(ci->data); softc = &cfiscsi_softc; mtx_lock(&softc->lock); TAILQ_FOREACH(cs, &softc->sessions, cs_next) { if (citp->all == 0 && cs->cs_id != citp->connection_id && strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) continue; response = icl_pdu_new(cs->cs_conn, M_NOWAIT); if (response == NULL) { /* * Oh well. Just terminate the connection. */ } else { bhsam = (struct iscsi_bhs_asynchronous_message *) response->ip_bhs; bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; bhsam->bhsam_flags = 0x80; bhsam->bhsam_0xffffffff = 0xffffffff; bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_TERMINATES_SESSION; cfiscsi_pdu_queue(response); } cfiscsi_session_terminate(cs); found++; } mtx_unlock(&softc->lock); if (found == 0) { ci->status = CTL_ISCSI_SESSION_NOT_FOUND; snprintf(ci->error_str, sizeof(ci->error_str), "No matching connections found"); return; } ci->status = CTL_ISCSI_OK; } static void cfiscsi_ioctl_limits(struct ctl_iscsi *ci) { struct ctl_iscsi_limits_params *cilp; struct icl_drv_limits idl; int error; cilp = (struct ctl_iscsi_limits_params *)&(ci->data); error = icl_limits(cilp->offload, false, cilp->socket, &idl); if (error != 0) { ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: icl_limits failed with error %d", __func__, error); return; } cilp->max_recv_data_segment_length = idl.idl_max_recv_data_segment_length; cilp->max_send_data_segment_length = idl.idl_max_send_data_segment_length; cilp->max_burst_length = idl.idl_max_burst_length; cilp->first_burst_length = idl.idl_first_burst_length; ci->status = CTL_ISCSI_OK; } #ifdef ICL_KERNEL_PROXY static void cfiscsi_ioctl_listen(struct ctl_iscsi *ci) { struct ctl_iscsi_listen_params *cilp; struct sockaddr *sa; int error; cilp = (struct ctl_iscsi_listen_params *)&(ci->data); if (cfiscsi_softc.listener == NULL) { CFISCSI_DEBUG("no listener"); snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); ci->status = CTL_ISCSI_ERROR; return; } error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); if (error != 0) { CFISCSI_DEBUG("getsockaddr, error %d", error); snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); ci->status = CTL_ISCSI_ERROR; return; } error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, cilp->socktype, cilp->protocol, sa, cilp->portal_id); if (error != 0) { free(sa, M_SONAME); CFISCSI_DEBUG("icl_listen_add, error %d", error); snprintf(ci->error_str, sizeof(ci->error_str), "icl_listen_add failed, error %d", error); ci->status = CTL_ISCSI_ERROR; return; } ci->status = CTL_ISCSI_OK; } static void cfiscsi_ioctl_accept(struct ctl_iscsi *ci) { struct ctl_iscsi_accept_params *ciap; struct cfiscsi_session *cs; int error; ciap = (struct ctl_iscsi_accept_params *)&(ci->data); mtx_lock(&cfiscsi_softc.lock); for (;;) { TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { if (cs->cs_waiting_for_ctld) break; } if (cs != NULL) break; error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); if (error != 0) { mtx_unlock(&cfiscsi_softc.lock); snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); ci->status = CTL_ISCSI_ERROR; return; } } mtx_unlock(&cfiscsi_softc.lock); cs->cs_waiting_for_ctld = false; cs->cs_login_phase = true; ciap->connection_id = cs->cs_id; ciap->portal_id = cs->cs_portal_id; ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, cs->cs_initiator_sa->sa_len); if (error != 0) { snprintf(ci->error_str, sizeof(ci->error_str), "copyout failed with error %d", error); ci->status = CTL_ISCSI_ERROR; return; } ci->status = CTL_ISCSI_OK; } static void cfiscsi_ioctl_send(struct ctl_iscsi *ci) { struct ctl_iscsi_send_params *cisp; struct cfiscsi_session *cs; struct icl_pdu *ip; size_t datalen; void *data; int error; cisp = (struct ctl_iscsi_send_params *)&(ci->data); mtx_lock(&cfiscsi_softc.lock); TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { if (cs->cs_id == cisp->connection_id) break; } if (cs == NULL) { mtx_unlock(&cfiscsi_softc.lock); snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); ci->status = CTL_ISCSI_ERROR; return; } mtx_unlock(&cfiscsi_softc.lock); #if 0 if (cs->cs_login_phase == false) return (EBUSY); #endif if (cs->cs_terminating) { snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); ci->status = CTL_ISCSI_ERROR; return; } datalen = cisp->data_segment_len; /* * XXX */ //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { if (datalen > 65535) { snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); ci->status = CTL_ISCSI_ERROR; return; } if (datalen > 0) { data = malloc(datalen, M_CFISCSI, M_WAITOK); error = copyin(cisp->data_segment, data, datalen); if (error != 0) { free(data, M_CFISCSI); snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); ci->status = CTL_ISCSI_ERROR; return; } } ip = icl_pdu_new(cs->cs_conn, M_WAITOK); memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); if (datalen > 0) { icl_pdu_append_data(ip, data, datalen, M_WAITOK); free(data, M_CFISCSI); } CFISCSI_SESSION_LOCK(cs); icl_pdu_queue(ip); CFISCSI_SESSION_UNLOCK(cs); ci->status = CTL_ISCSI_OK; } static void cfiscsi_ioctl_receive(struct ctl_iscsi *ci) { struct ctl_iscsi_receive_params *cirp; struct cfiscsi_session *cs; struct icl_pdu *ip; void *data; int error; cirp = (struct ctl_iscsi_receive_params *)&(ci->data); mtx_lock(&cfiscsi_softc.lock); TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { if (cs->cs_id == cirp->connection_id) break; } if (cs == NULL) { mtx_unlock(&cfiscsi_softc.lock); snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); ci->status = CTL_ISCSI_ERROR; return; } mtx_unlock(&cfiscsi_softc.lock); #if 0 if (is->is_login_phase == false) return (EBUSY); #endif CFISCSI_SESSION_LOCK(cs); while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); if (error != 0) { CFISCSI_SESSION_UNLOCK(cs); snprintf(ci->error_str, sizeof(ci->error_str), "interrupted by signal"); ci->status = CTL_ISCSI_ERROR; return; } } if (cs->cs_terminating) { CFISCSI_SESSION_UNLOCK(cs); snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); ci->status = CTL_ISCSI_ERROR; return; } ip = cs->cs_login_pdu; cs->cs_login_pdu = NULL; CFISCSI_SESSION_UNLOCK(cs); if (ip->ip_data_len > cirp->data_segment_len) { icl_pdu_free(ip); snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); ci->status = CTL_ISCSI_ERROR; return; } copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); if (ip->ip_data_len > 0) { data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); icl_pdu_get_data(ip, 0, data, ip->ip_data_len); copyout(data, cirp->data_segment, ip->ip_data_len); free(data, M_CFISCSI); } icl_pdu_free(ip); ci->status = CTL_ISCSI_OK; } #endif /* !ICL_KERNEL_PROXY */ static void cfiscsi_ioctl_port_create(struct ctl_req *req) { struct cfiscsi_target *ct; struct ctl_port *port; const char *target, *alias, *val; struct scsi_vpd_id_descriptor *desc; int retval, len, idlen; uint16_t tag; target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", NULL); if (target == NULL || val == NULL) { req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "Missing required argument"); return; } tag = strtoul(val, NULL, 0); ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); if (ct == NULL) { req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "failed to create target \"%s\"", target); return; } if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "target \"%s\" for portal group tag %u already exists", target, tag); cfiscsi_target_release(ct); return; } port = &ct->ct_port; // WAT if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) goto done; port->frontend = &cfiscsi_frontend; port->port_type = CTL_PORT_ISCSI; /* XXX KDM what should the real number be here? */ port->num_requested_ctl_io = 4096; port->port_name = "iscsi"; port->physical_port = (int)tag; port->virtual_port = ct->ct_target_id; port->port_online = cfiscsi_online; port->port_offline = cfiscsi_offline; port->port_info = cfiscsi_info; port->onoff_arg = ct; port->fe_datamove = cfiscsi_datamove; port->fe_done = cfiscsi_done; port->targ_port = -1; port->options = nvlist_clone(req->args_nvl); /* Generate Port ID. */ idlen = strlen(target) + strlen(",t,0x0001") + 1; idlen = roundup2(idlen, 4); len = sizeof(struct scsi_vpd_device_id) + idlen; port->port_devid = malloc(sizeof(struct ctl_devid) + len, M_CTL, M_WAITOK | M_ZERO); port->port_devid->len = len; desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | SVPD_ID_TYPE_SCSI_NAME; desc->length = idlen; snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); /* Generate Target ID. */ idlen = strlen(target) + 1; idlen = roundup2(idlen, 4); len = sizeof(struct scsi_vpd_device_id) + idlen; port->target_devid = malloc(sizeof(struct ctl_devid) + len, M_CTL, M_WAITOK | M_ZERO); port->target_devid->len = len; desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | SVPD_ID_TYPE_SCSI_NAME; desc->length = idlen; strlcpy(desc->identifier, target, idlen); retval = ctl_port_register(port); if (retval != 0) { free(port->port_devid, M_CFISCSI); free(port->target_devid, M_CFISCSI); cfiscsi_target_release(ct); req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "ctl_port_register() failed with error %d", retval); return; } done: ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; req->status = CTL_LUN_OK; req->result_nvl = nvlist_create(0); nvlist_add_number(req->result_nvl, "port_id", port->targ_port); } static void cfiscsi_ioctl_port_remove(struct ctl_req *req) { struct cfiscsi_target *ct; const char *target, *val; uint16_t tag; target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", NULL); if (target == NULL || val == NULL) { req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "Missing required argument"); return; } tag = strtoul(val, NULL, 0); ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); if (ct == NULL) { req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "can't find target \"%s\"", target); return; } ct->ct_state = CFISCSI_TARGET_STATE_DYING; ctl_port_offline(&ct->ct_port); cfiscsi_target_release(ct); cfiscsi_target_release(ct); req->status = CTL_LUN_OK; } static int cfiscsi_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) { struct ctl_iscsi *ci; struct ctl_req *req; if (cmd == CTL_PORT_REQ) { req = (struct ctl_req *)addr; switch (req->reqtype) { case CTL_REQ_CREATE: cfiscsi_ioctl_port_create(req); break; case CTL_REQ_REMOVE: cfiscsi_ioctl_port_remove(req); break; default: req->status = CTL_LUN_ERROR; snprintf(req->error_str, sizeof(req->error_str), "Unsupported request type %d", req->reqtype); } return (0); } if (cmd != CTL_ISCSI) return (ENOTTY); ci = (struct ctl_iscsi *)addr; switch (ci->type) { case CTL_ISCSI_HANDOFF: cfiscsi_ioctl_handoff(ci); break; case CTL_ISCSI_LIST: cfiscsi_ioctl_list(ci); break; case CTL_ISCSI_LOGOUT: cfiscsi_ioctl_logout(ci); break; case CTL_ISCSI_TERMINATE: cfiscsi_ioctl_terminate(ci); break; case CTL_ISCSI_LIMITS: cfiscsi_ioctl_limits(ci); break; #ifdef ICL_KERNEL_PROXY case CTL_ISCSI_LISTEN: cfiscsi_ioctl_listen(ci); break; case CTL_ISCSI_ACCEPT: cfiscsi_ioctl_accept(ci); break; case CTL_ISCSI_SEND: cfiscsi_ioctl_send(ci); break; case CTL_ISCSI_RECEIVE: cfiscsi_ioctl_receive(ci); break; #else case CTL_ISCSI_LISTEN: case CTL_ISCSI_ACCEPT: case CTL_ISCSI_SEND: case CTL_ISCSI_RECEIVE: ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: CTL compiled without ICL_KERNEL_PROXY", __func__); break; #endif /* !ICL_KERNEL_PROXY */ default: ci->status = CTL_ISCSI_ERROR; snprintf(ci->error_str, sizeof(ci->error_str), "%s: invalid iSCSI request type %d", __func__, ci->type); break; } return (0); } static void cfiscsi_target_hold(struct cfiscsi_target *ct) { refcount_acquire(&ct->ct_refcount); } static void cfiscsi_target_release(struct cfiscsi_target *ct) { struct cfiscsi_softc *softc; softc = ct->ct_softc; mtx_lock(&softc->lock); if (refcount_release(&ct->ct_refcount)) { TAILQ_REMOVE(&softc->targets, ct, ct_next); mtx_unlock(&softc->lock); if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { ct->ct_state = CFISCSI_TARGET_STATE_INVALID; if (ctl_port_deregister(&ct->ct_port) != 0) printf("%s: ctl_port_deregister() failed\n", __func__); } free(ct, M_CFISCSI); return; } mtx_unlock(&softc->lock); } static struct cfiscsi_target * cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) { struct cfiscsi_target *ct; mtx_lock(&softc->lock); TAILQ_FOREACH(ct, &softc->targets, ct_next) { if (ct->ct_tag != tag || strcmp(name, ct->ct_name) != 0 || ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) continue; cfiscsi_target_hold(ct); mtx_unlock(&softc->lock); return (ct); } mtx_unlock(&softc->lock); return (NULL); } static struct cfiscsi_target * cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, const char *alias, uint16_t tag) { struct cfiscsi_target *ct, *newct; if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) return (NULL); newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); mtx_lock(&softc->lock); TAILQ_FOREACH(ct, &softc->targets, ct_next) { if (ct->ct_tag != tag || strcmp(name, ct->ct_name) != 0 || ct->ct_state == CFISCSI_TARGET_STATE_INVALID) continue; cfiscsi_target_hold(ct); mtx_unlock(&softc->lock); free(newct, M_CFISCSI); return (ct); } strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); if (alias != NULL) strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); newct->ct_tag = tag; refcount_init(&newct->ct_refcount, 1); newct->ct_softc = softc; if (TAILQ_EMPTY(&softc->targets)) softc->last_target_id = 0; newct->ct_target_id = ++softc->last_target_id; TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); mtx_unlock(&softc->lock); return (newct); } static void cfiscsi_pdu_done(struct icl_pdu *ip, int error) { if (error != 0) ; // XXX: Do something on error? ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); } static void cfiscsi_datamove_in(union ctl_io *io) { struct cfiscsi_session *cs; struct icl_pdu *request, *response; const struct iscsi_bhs_scsi_command *bhssc; struct iscsi_bhs_data_in *bhsdi; struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; size_t len, expected_len, sg_len, buffer_offset; size_t max_send_data_segment_length; const char *sg_addr; icl_pdu_cb cb; int ctl_sg_count, error, i; request = PRIV_REQUEST(io); cs = PDU_SESSION(request); bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_COMMAND, ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); if (io->scsiio.kern_sg_entries > 0) { ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; ctl_sg_count = io->scsiio.kern_sg_entries; } else { ctl_sglist = &ctl_sg_entry; ctl_sglist->addr = io->scsiio.kern_data_ptr; ctl_sglist->len = io->scsiio.kern_data_len; ctl_sg_count = 1; } /* * This is the offset within the current SCSI command; for the first * call to cfiscsi_datamove() it will be 0, and for subsequent ones * it will be the sum of lengths of previous ones. */ buffer_offset = io->scsiio.kern_rel_offset; /* * This is the transfer length expected by the initiator. It can be * different from the amount of data from the SCSI point of view. */ expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); /* * If the transfer is outside of expected length -- we are done. */ if (buffer_offset >= expected_len) { #if 0 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " "already sent the expected len", buffer_offset); #endif ctl_datamove_done(io, true); return; } if (io->scsiio.kern_data_ref != NULL) cb = cfiscsi_pdu_done; else cb = NULL; i = 0; sg_addr = NULL; sg_len = 0; response = NULL; bhsdi = NULL; if (cs->cs_conn->ic_hw_isomax != 0) max_send_data_segment_length = cs->cs_conn->ic_hw_isomax; else max_send_data_segment_length = cs->cs_conn->ic_max_send_data_segment_length; for (;;) { if (response == NULL) { response = cfiscsi_pdu_new_response(request, M_NOWAIT); if (response == NULL) { CFISCSI_SESSION_WARN(cs, "failed to " "allocate memory; dropping connection"); ctl_set_busy(&io->scsiio); ctl_datamove_done(io, true); cfiscsi_session_terminate(cs); return; } bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; bhsdi->bhsdi_initiator_task_tag = bhssc->bhssc_initiator_task_tag; bhsdi->bhsdi_target_transfer_tag = 0xffffffff; bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)); bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); } KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); if (sg_len == 0) { sg_addr = ctl_sglist[i].addr; sg_len = ctl_sglist[i].len; KASSERT(sg_len > 0, ("sg_len <= 0")); } len = sg_len; /* * Truncate to maximum data segment length. */ KASSERT(response->ip_data_len < max_send_data_segment_length, ("ip_data_len %zd >= max_send_data_segment_length %zd", response->ip_data_len, max_send_data_segment_length)); if (response->ip_data_len + len > max_send_data_segment_length) { len = max_send_data_segment_length - response->ip_data_len; KASSERT(len <= sg_len, ("len %zd > sg_len %zd", len, sg_len)); } /* * Truncate to expected data transfer length. */ KASSERT(buffer_offset + response->ip_data_len < expected_len, ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", buffer_offset, response->ip_data_len, expected_len)); if (buffer_offset + response->ip_data_len + len > expected_len) { CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " "to expected data transfer length %zd", buffer_offset + response->ip_data_len + len, expected_len); len = expected_len - (buffer_offset + response->ip_data_len); KASSERT(len <= sg_len, ("len %zd > sg_len %zd", len, sg_len)); } error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT | (cb ? ICL_NOCOPY : 0)); if (error != 0) { CFISCSI_SESSION_WARN(cs, "failed to " "allocate memory; dropping connection"); icl_pdu_free(response); ctl_set_busy(&io->scsiio); ctl_datamove_done(io, true); cfiscsi_session_terminate(cs); return; } sg_addr += len; sg_len -= len; io->scsiio.kern_data_resid -= len; KASSERT(buffer_offset + response->ip_data_len <= expected_len, ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", buffer_offset, response->ip_data_len, expected_len)); if (buffer_offset + response->ip_data_len == expected_len) { /* * Already have the amount of data the initiator wanted. */ break; } if (sg_len == 0) { /* * End of scatter-gather segment; * proceed to the next one... */ if (i == ctl_sg_count - 1) { /* * ... unless this was the last one. */ break; } i++; } if (response->ip_data_len == max_send_data_segment_length) { /* * Can't stuff more data into the current PDU; * queue it. Note that's not enough to check * for kern_data_resid == 0 instead; there * may be several Data-In PDUs for the final * call to cfiscsi_datamove(), and we want * to set the F flag only on the last of them. */ buffer_offset += response->ip_data_len; if (buffer_offset == io->scsiio.kern_total_len || buffer_offset == expected_len) { buffer_offset -= response->ip_data_len; break; } PRIV_EXPDATASN(io) += howmany(response->ip_data_len, cs->cs_conn->ic_max_send_data_segment_length); if (cb != NULL) { response->ip_prv0 = io->scsiio.kern_data_ref; response->ip_prv1 = io->scsiio.kern_data_arg; io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); } cfiscsi_pdu_queue_cb(response, cb); response = NULL; bhsdi = NULL; } } if (response != NULL) { buffer_offset += response->ip_data_len; if (buffer_offset == io->scsiio.kern_total_len || buffer_offset == expected_len) { bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; if (io->io_hdr.status == CTL_SUCCESS) { bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; if (io->scsiio.kern_total_len < ntohl(bhssc->bhssc_expected_data_transfer_length)) { bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; bhsdi->bhsdi_residual_count = htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - io->scsiio.kern_total_len); } else if (io->scsiio.kern_total_len > ntohl(bhssc->bhssc_expected_data_transfer_length)) { bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; bhsdi->bhsdi_residual_count = htonl(io->scsiio.kern_total_len - ntohl(bhssc->bhssc_expected_data_transfer_length)); } bhsdi->bhsdi_status = io->scsiio.scsi_status; io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; } } KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); PRIV_EXPDATASN(io) += howmany(response->ip_data_len, cs->cs_conn->ic_max_send_data_segment_length); if (cb != NULL) { response->ip_prv0 = io->scsiio.kern_data_ref; response->ip_prv1 = io->scsiio.kern_data_arg; io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); } cfiscsi_pdu_queue_cb(response, cb); } ctl_datamove_done(io, true); } static void cfiscsi_datamove_out(union ctl_io *io) { struct cfiscsi_session *cs; struct icl_pdu *request, *response; const struct iscsi_bhs_scsi_command *bhssc; struct iscsi_bhs_r2t *bhsr2t; struct cfiscsi_data_wait *cdw; struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; uint32_t expected_len, datamove_len, r2t_off, r2t_len; uint32_t target_transfer_tag; bool done; request = PRIV_REQUEST(io); cs = PDU_SESSION(request); bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_COMMAND, ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); /* * Complete write underflow. Not a single byte to read. Return. */ expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); if (io->scsiio.kern_rel_offset >= expected_len) { ctl_datamove_done(io, true); return; } datamove_len = MIN(io->scsiio.kern_data_len, expected_len - io->scsiio.kern_rel_offset); target_transfer_tag = atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); if (target_transfer_tag == 0xffffffff) { target_transfer_tag = atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); } cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, &target_transfer_tag); if (cdw == NULL) { CFISCSI_SESSION_WARN(cs, "failed to " "allocate memory; dropping connection"); ctl_set_busy(&io->scsiio); ctl_datamove_done(io, true); cfiscsi_session_terminate(cs); return; } #if 0 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " "task tag 0x%x, target transfer tag 0x%x", bhssc->bhssc_initiator_task_tag, target_transfer_tag); #endif cdw->cdw_ctl_io = io; cdw->cdw_target_transfer_tag = target_transfer_tag; cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; cdw->cdw_r2t_end = datamove_len; cdw->cdw_datasn = 0; /* Set initial data pointer for the CDW respecting ext_data_filled. */ if (io->scsiio.kern_sg_entries > 0) { ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; } else { ctl_sglist = &ctl_sg_entry; ctl_sglist->addr = io->scsiio.kern_data_ptr; ctl_sglist->len = datamove_len; } cdw->cdw_sg_index = 0; cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; r2t_off = io->scsiio.ext_data_filled; while (r2t_off > 0) { if (r2t_off >= cdw->cdw_sg_len) { r2t_off -= cdw->cdw_sg_len; cdw->cdw_sg_index++; cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; continue; } cdw->cdw_sg_addr += r2t_off; cdw->cdw_sg_len -= r2t_off; r2t_off = 0; } if (cs->cs_immediate_data && io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < icl_pdu_data_segment_length(request)) { done = cfiscsi_handle_data_segment(request, cdw); if (done) { cfiscsi_data_wait_free(cs, cdw); ctl_datamove_done(io, true); return; } } r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, cs->cs_max_burst_length); cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; CFISCSI_SESSION_LOCK(cs); if (cs->cs_terminating_tasks) { CFISCSI_SESSION_UNLOCK(cs); KASSERT((io->io_hdr.flags & CTL_FLAG_ABORT) != 0, ("%s: I/O request %p on termating session %p not aborted", __func__, io, cs)); CFISCSI_SESSION_WARN(cs, "aborting data_wait for aborted I/O"); cfiscsi_data_wait_abort(cs, cdw, 44); return; } TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); CFISCSI_SESSION_UNLOCK(cs); /* * XXX: We should limit the number of outstanding R2T PDUs * per task to MaxOutstandingR2T. */ response = cfiscsi_pdu_new_response(request, M_NOWAIT); if (response == NULL) { CFISCSI_SESSION_WARN(cs, "failed to " "allocate memory; dropping connection"); ctl_set_busy(&io->scsiio); ctl_datamove_done(io, true); cfiscsi_session_terminate(cs); return; } io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; bhsr2t->bhsr2t_flags = 0x80; bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; /* * XXX: Here we assume that cfiscsi_datamove() won't ever * be running concurrently on several CPUs for a given * command. */ bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); /* * This is the offset within the current SCSI command; * i.e. for the first call of datamove(), it will be 0, * and for subsequent ones it will be the sum of lengths * of previous ones. * * The ext_data_filled is to account for unsolicited * (immediate) data that might have already arrived. */ bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); /* * This is the total length (sum of S/G lengths) this call * to cfiscsi_datamove() is supposed to handle, limited by * MaxBurstLength. */ bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); cfiscsi_pdu_queue(response); } static void cfiscsi_datamove(union ctl_io *io) { if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) cfiscsi_datamove_in(io); else { /* We hadn't received anything during this datamove yet. */ io->scsiio.ext_data_filled = 0; cfiscsi_datamove_out(io); } } static void cfiscsi_scsi_command_done(union ctl_io *io) { struct icl_pdu *request, *response; struct iscsi_bhs_scsi_command *bhssc; struct iscsi_bhs_scsi_response *bhssr; #ifdef DIAGNOSTIC struct cfiscsi_data_wait *cdw; struct cfiscsi_session *cs; #endif uint16_t sense_length; request = PRIV_REQUEST(io); bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_SCSI_COMMAND, ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", // bhssc->bhssc_initiator_task_tag); #ifdef DIAGNOSTIC cs = PDU_SESSION(request); CFISCSI_SESSION_LOCK(cs); TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) KASSERT(bhssc->bhssc_initiator_task_tag != cdw->cdw_initiator_task_tag, ("dangling cdw")); CFISCSI_SESSION_UNLOCK(cs); #endif /* * Do not return status for aborted commands. * There are exceptions, but none supported by CTL yet. */ if (((io->io_hdr.flags & CTL_FLAG_ABORT) && (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { ctl_free_io(io); icl_pdu_free(request); return; } response = cfiscsi_pdu_new_response(request, M_WAITOK); bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; bhssr->bhssr_flags = 0x80; /* * XXX: We don't deal with bidirectional under/overflows; * does anything actually support those? */ if (io->scsiio.kern_total_len < ntohl(bhssc->bhssc_expected_data_transfer_length)) { bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; bhssr->bhssr_residual_count = htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - io->scsiio.kern_total_len); //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", // ntohl(bhssr->bhssr_residual_count)); } else if (io->scsiio.kern_total_len > ntohl(bhssc->bhssc_expected_data_transfer_length)) { bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - ntohl(bhssc->bhssc_expected_data_transfer_length)); //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", // ntohl(bhssr->bhssr_residual_count)); } bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; bhssr->bhssr_status = io->scsiio.scsi_status; bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); if (io->scsiio.sense_len > 0) { #if 0 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", io->scsiio.sense_len); #endif sense_length = htons(io->scsiio.sense_len); icl_pdu_append_data(response, &sense_length, sizeof(sense_length), M_WAITOK); icl_pdu_append_data(response, &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); } ctl_free_io(io); icl_pdu_free(request); cfiscsi_pdu_queue(response); } static void cfiscsi_task_management_done(union ctl_io *io) { struct icl_pdu *request, *response; struct iscsi_bhs_task_management_request *bhstmr; struct iscsi_bhs_task_management_response *bhstmr2; struct cfiscsi_data_wait *cdw, *tmpcdw; struct cfiscsi_session *cs, *tcs; struct cfiscsi_softc *softc; int cold_reset = 0; request = PRIV_REQUEST(io); cs = PDU_SESSION(request); bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == ISCSI_BHS_OPCODE_TASK_REQUEST, ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); #if 0 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", bhstmr->bhstmr_initiator_task_tag, bhstmr->bhstmr_referenced_task_tag); #endif if ((bhstmr->bhstmr_function & ~0x80) == BHSTMR_FUNCTION_ABORT_TASK) { /* * Make sure we no longer wait for Data-Out for this command. */ CFISCSI_SESSION_LOCK(cs); TAILQ_FOREACH_SAFE(cdw, &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { if (bhstmr->bhstmr_referenced_task_tag != cdw->cdw_initiator_task_tag) continue; #if 0 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); #endif TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); cfiscsi_data_wait_abort(cs, cdw, 43); } CFISCSI_SESSION_UNLOCK(cs); } if ((bhstmr->bhstmr_function & ~0x80) == BHSTMR_FUNCTION_TARGET_COLD_RESET && io->io_hdr.status == CTL_SUCCESS) cold_reset = 1; response = cfiscsi_pdu_new_response(request, M_WAITOK); bhstmr2 = (struct iscsi_bhs_task_management_response *) response->ip_bhs; bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; bhstmr2->bhstmr_flags = 0x80; switch (io->taskio.task_status) { case CTL_TASK_FUNCTION_COMPLETE: bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; break; case CTL_TASK_FUNCTION_SUCCEEDED: bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; break; case CTL_TASK_LUN_DOES_NOT_EXIST: bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; break; case CTL_TASK_FUNCTION_NOT_SUPPORTED: default: bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; break; } memcpy(bhstmr2->bhstmr_additional_reponse_information, io->taskio.task_resp, sizeof(io->taskio.task_resp)); bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; ctl_free_io(io); icl_pdu_free(request); cfiscsi_pdu_queue(response); if (cold_reset) { softc = cs->cs_target->ct_softc; mtx_lock(&softc->lock); TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { if (tcs->cs_target == cs->cs_target) cfiscsi_session_terminate(tcs); } mtx_unlock(&softc->lock); } } static void cfiscsi_done(union ctl_io *io) { struct icl_pdu *request; struct cfiscsi_session *cs; KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), ("invalid CTL status %#x", io->io_hdr.status)); request = PRIV_REQUEST(io); cs = PDU_SESSION(request); switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { case ISCSI_BHS_OPCODE_SCSI_COMMAND: cfiscsi_scsi_command_done(io); break; case ISCSI_BHS_OPCODE_TASK_REQUEST: cfiscsi_task_management_done(io); break; case ISCSI_BHS_OPCODE_INTERNAL: /* * Implicit task termination has just completed; nothing to do. */ icl_pdu_free(request); cs->cs_tasks_aborted = true; refcount_release(&cs->cs_outstanding_ctl_pdus); wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); ctl_free_io(io); return; default: panic("cfiscsi_done called with wrong opcode 0x%x", request->ip_bhs->bhs_opcode); } refcount_release(&cs->cs_outstanding_ctl_pdus); }