1fcf3ce44SJohn Forte /* 2fcf3ce44SJohn Forte * CDDL HEADER START 3fcf3ce44SJohn Forte * 4fcf3ce44SJohn Forte * The contents of this file are subject to the terms of the 5fcf3ce44SJohn Forte * Common Development and Distribution License (the "License"). 6fcf3ce44SJohn Forte * You may not use this file except in compliance with the License. 7fcf3ce44SJohn Forte * 8fcf3ce44SJohn Forte * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fcf3ce44SJohn Forte * or http://www.opensolaris.org/os/licensing. 10fcf3ce44SJohn Forte * See the License for the specific language governing permissions 11fcf3ce44SJohn Forte * and limitations under the License. 12fcf3ce44SJohn Forte * 13fcf3ce44SJohn Forte * When distributing Covered Code, include this CDDL HEADER in each 14fcf3ce44SJohn Forte * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fcf3ce44SJohn Forte * If applicable, add the following below this CDDL HEADER, with the 16fcf3ce44SJohn Forte * fields enclosed by brackets "[]" replaced with your own identifying 17fcf3ce44SJohn Forte * information: Portions Copyright [yyyy] [name of copyright owner] 18fcf3ce44SJohn Forte * 19fcf3ce44SJohn Forte * CDDL HEADER END 20fcf3ce44SJohn Forte */ 21fcf3ce44SJohn Forte /* 22fcf3ce44SJohn Forte * Copyright 2000 by Cisco Systems, Inc. All rights reserved. 231a1a84a3SPeter Dunlap * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24fcf3ce44SJohn Forte * Use is subject to license terms. 25fcf3ce44SJohn Forte * 26fcf3ce44SJohn Forte * iSCSI Pseudo HBA Driver 27fcf3ce44SJohn Forte */ 28fcf3ce44SJohn Forte 29fcf3ce44SJohn Forte #include <sys/socket.h> /* networking stuff */ 30fcf3ce44SJohn Forte #include <sys/t_kuser.h> /* networking stuff */ 31fcf3ce44SJohn Forte #include <sys/tihdr.h> /* networking stuff */ 32fcf3ce44SJohn Forte #include <sys/strsubr.h> /* networking stuff */ 33fcf3ce44SJohn Forte #include <netinet/tcp.h> /* TCP_NODELAY */ 34fcf3ce44SJohn Forte #include <sys/socketvar.h> /* _ALLOC_SLEEP */ 35fcf3ce44SJohn Forte #include <sys/strsun.h> /* DB_TYPE() */ 36fcf3ce44SJohn Forte 37fcf3ce44SJohn Forte #include "iscsi.h" /* iscsi driver */ 381a1a84a3SPeter Dunlap #include <sys/iscsi_protocol.h> /* iscsi protocol */ 39fcf3ce44SJohn Forte 4030e7468fSPeter Dunlap #define ISCSI_INI_TASK_TTT 0xffffffff 4130e7468fSPeter Dunlap 4230e7468fSPeter Dunlap boolean_t iscsi_io_logging = B_FALSE; 4330e7468fSPeter Dunlap 4430e7468fSPeter Dunlap #define ISCSI_CHECK_SCSI_READ(ICHK_CMD, ICHK_HDR, ICHK_LEN, ICHK_TYPE) \ 4530e7468fSPeter Dunlap if (idm_pattern_checking) { \ 4630e7468fSPeter Dunlap struct scsi_pkt *pkt = (ICHK_CMD)->cmd_un.scsi.pkt; \ 4730e7468fSPeter Dunlap if (((ICHK_HDR)->response == 0) && \ 4830e7468fSPeter Dunlap ((ICHK_HDR)->cmd_status == 0) && \ 4930e7468fSPeter Dunlap ((pkt->pkt_cdbp[0] == SCMD_READ_G1) || \ 5030e7468fSPeter Dunlap (pkt->pkt_cdbp[0] == SCMD_READ_G4) || \ 5130e7468fSPeter Dunlap (pkt->pkt_cdbp[0] == SCMD_READ) || \ 5230e7468fSPeter Dunlap (pkt->pkt_cdbp[0] == SCMD_READ_G5))) { \ 5330e7468fSPeter Dunlap idm_buf_t *idb = (ICHK_CMD)->cmd_un.scsi.ibp_ibuf; \ 5430e7468fSPeter Dunlap IDM_BUFPAT_CHECK(idb, ICHK_LEN, ICHK_TYPE); \ 5530e7468fSPeter Dunlap } \ 5630e7468fSPeter Dunlap } 5730e7468fSPeter Dunlap 58fcf3ce44SJohn Forte /* generic io helpers */ 59fcf3ce44SJohn Forte static uint32_t n2h24(uchar_t *ptr); 60fcf3ce44SJohn Forte static int iscsi_sna_lt(uint32_t n1, uint32_t n2); 6130e7468fSPeter Dunlap void iscsi_update_flow_control(iscsi_sess_t *isp, 62fcf3ce44SJohn Forte uint32_t max, uint32_t exp); 6330e7468fSPeter Dunlap static iscsi_status_t iscsi_rx_process_scsi_itt_to_icmdp(iscsi_sess_t *isp, 6430e7468fSPeter Dunlap idm_conn_t *ic, iscsi_scsi_rsp_hdr_t *ihp, iscsi_cmd_t **icmdp); 65fcf3ce44SJohn Forte static iscsi_status_t iscsi_rx_process_itt_to_icmdp(iscsi_sess_t *isp, 66fcf3ce44SJohn Forte iscsi_hdr_t *ihp, iscsi_cmd_t **icmdp); 6730e7468fSPeter Dunlap static void iscsi_process_rsp_status(iscsi_sess_t *isp, iscsi_conn_t *icp, 6830e7468fSPeter Dunlap idm_status_t status); 6930e7468fSPeter Dunlap static void iscsi_drop_conn_cleanup(iscsi_conn_t *icp); 70fcf3ce44SJohn Forte 7130e7468fSPeter Dunlap /* callbacks from idm */ 7230e7468fSPeter Dunlap static idm_pdu_cb_t iscsi_tx_done; 7330e7468fSPeter Dunlap 7430e7468fSPeter Dunlap /* receivers */ 7530e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_nop(idm_conn_t *ic, idm_pdu_t *pdu); 7630e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_data_rsp(idm_conn_t *ic, 7730e7468fSPeter Dunlap idm_pdu_t *pdu); 7830e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_cmd_rsp(idm_conn_t *ic, idm_pdu_t *pdu); 7930e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_reject_rsp(idm_conn_t *ic, 8030e7468fSPeter Dunlap idm_pdu_t *pdu); 8130e7468fSPeter Dunlap 8230e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_rejected_tsk_mgt(idm_conn_t *ic, 8330e7468fSPeter Dunlap iscsi_hdr_t *old_ihp); 8430e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_task_mgt_rsp(idm_conn_t *ic, 8530e7468fSPeter Dunlap idm_pdu_t *pdu); 8630e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_logout_rsp(idm_conn_t *ic, 8730e7468fSPeter Dunlap idm_pdu_t *pdu); 8830e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_async_rsp(idm_conn_t *ic, 8930e7468fSPeter Dunlap idm_pdu_t *pdu); 9030e7468fSPeter Dunlap static idm_status_t iscsi_rx_process_text_rsp(idm_conn_t *ic, 9130e7468fSPeter Dunlap idm_pdu_t *pdu); 92fcf3ce44SJohn Forte 93fcf3ce44SJohn Forte /* senders */ 94fcf3ce44SJohn Forte static iscsi_status_t iscsi_tx_scsi(iscsi_sess_t *isp, iscsi_cmd_t *icmdp); 95fcf3ce44SJohn Forte static iscsi_status_t iscsi_tx_nop(iscsi_sess_t *isp, iscsi_cmd_t *icmdp); 96fcf3ce44SJohn Forte static iscsi_status_t iscsi_tx_abort(iscsi_sess_t *isp, iscsi_cmd_t *icmdp); 97fcf3ce44SJohn Forte static iscsi_status_t iscsi_tx_reset(iscsi_sess_t *isp, iscsi_cmd_t *icmdp); 98fcf3ce44SJohn Forte static iscsi_status_t iscsi_tx_logout(iscsi_sess_t *isp, iscsi_cmd_t *icmdp); 99fcf3ce44SJohn Forte static iscsi_status_t iscsi_tx_text(iscsi_sess_t *isp, iscsi_cmd_t *icmdp); 100fcf3ce44SJohn Forte 101fcf3ce44SJohn Forte 102fcf3ce44SJohn Forte /* helpers */ 10330e7468fSPeter Dunlap static void iscsi_logout_start(void *arg); 104fcf3ce44SJohn Forte static void iscsi_handle_passthru_callback(struct scsi_pkt *pkt); 105fcf3ce44SJohn Forte static void iscsi_handle_nop(iscsi_conn_t *icp, uint32_t itt, uint32_t ttt); 106fcf3ce44SJohn Forte 107fcf3ce44SJohn Forte static void iscsi_timeout_checks(iscsi_sess_t *isp); 108fcf3ce44SJohn Forte static void iscsi_nop_checks(iscsi_sess_t *isp); 109fcf3ce44SJohn Forte 110fcf3ce44SJohn Forte /* 111fcf3ce44SJohn Forte * This file contains the main guts of the iSCSI protocol layer. 112fcf3ce44SJohn Forte * It's broken into 5 sections; Basic helper functions, RX IO path, 113fcf3ce44SJohn Forte * TX IO path, Completion (IC) IO path, and watchdog (WD) routines. 114fcf3ce44SJohn Forte * 115fcf3ce44SJohn Forte * The IO flow model is similiar to the below diagram. The 116fcf3ce44SJohn Forte * iscsi session, connection and command state machines are used 117fcf3ce44SJohn Forte * to drive IO through this flow diagram. Reference those files 118fcf3ce44SJohn Forte * to get a detailed description of their respective state models 119fcf3ce44SJohn Forte * prior to their xxx_state_machine_function(). 120fcf3ce44SJohn Forte * 121fcf3ce44SJohn Forte * tran_start() -> CMD_E1 TX_THREAD RX_THREAD 122fcf3ce44SJohn Forte * | T T 123fcf3ce44SJohn Forte * V T T 124fcf3ce44SJohn Forte * PENDING_Q --CMD_E2--> ACTIVE_Q - --CMD_E3--+ 125fcf3ce44SJohn Forte * T \ C T | 126fcf3ce44SJohn Forte * T \M T | 127fcf3ce44SJohn Forte * D T | 128fcf3ce44SJohn Forte * WD_THREAD TT|TT T | 129fcf3ce44SJohn Forte * /E T | 130fcf3ce44SJohn Forte * / 6 T | 131fcf3ce44SJohn Forte * ABORTING_Q<- --CMD_E3--+ 132fcf3ce44SJohn Forte * T | 133fcf3ce44SJohn Forte * T T | 134fcf3ce44SJohn Forte * T | 135fcf3ce44SJohn Forte * callback() <--CMD_E#-- COMPLETION_Q <------------+ 136fcf3ce44SJohn Forte * T 137fcf3ce44SJohn Forte * T 138fcf3ce44SJohn Forte * IC_THREAD 139fcf3ce44SJohn Forte * 140fcf3ce44SJohn Forte * External and internal command are ran thru this same state 141fcf3ce44SJohn Forte * machine. All commands enter the state machine by receiving an 142fcf3ce44SJohn Forte * ISCSI_CMD_EVENT_E1. This event places the command into the 143fcf3ce44SJohn Forte * PENDING_Q. Next when resources are available the TX_THREAD 144fcf3ce44SJohn Forte * issues a E2 event on the command. This sends the command 145fcf3ce44SJohn Forte * to the TCP stack and places the command on the ACTIVE_Q. While 146fcf3ce44SJohn Forte * on the PENDIING_Q and ACTIVE_Q, the command is monitored via the 147fcf3ce44SJohn Forte * WD_THREAD to ensure the pkt_time has not elapsed. If elapsed the 148fcf3ce44SJohn Forte * command is issued an E6(timeout) event which moves either (if pending) 149fcf3ce44SJohn Forte * completed the command or (if active) moves the command to the 150fcf3ce44SJohn Forte * aborting queue and issues a SCSI TASK MANAGEMENT ABORT command 151fcf3ce44SJohn Forte * to cancel the IO request. If the original command is completed 152fcf3ce44SJohn Forte * or the TASK MANAGEMENT command completes the command is moved 153fcf3ce44SJohn Forte * to the COMPLETION_Q via a E3 event. The IC_THREAD then processes 154fcf3ce44SJohn Forte * the COMPLETION_Q and issues the scsi_pkt callback. This 155fcf3ce44SJohn Forte * callback can not be processed directly from the RX_THREAD 156fcf3ce44SJohn Forte * because the callback might call back into the iscsi driver 157fcf3ce44SJohn Forte * causing a deadlock condition. 158fcf3ce44SJohn Forte * 159fcf3ce44SJohn Forte * For more details on the complete CMD state machine reference 160fcf3ce44SJohn Forte * the state machine diagram in iscsi_cmd.c. The connection state 161fcf3ce44SJohn Forte * machine is driven via IO events in this file. Then session 162fcf3ce44SJohn Forte * events are driven by the connection events. For complete 163fcf3ce44SJohn Forte * details on these state machines reference iscsi_sess.c and 164fcf3ce44SJohn Forte * iscsi_conn.c 165fcf3ce44SJohn Forte */ 166fcf3ce44SJohn Forte 167fcf3ce44SJohn Forte 168fcf3ce44SJohn Forte /* 169fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 170fcf3ce44SJohn Forte * | io helper routines | 171fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 172fcf3ce44SJohn Forte */ 173fcf3ce44SJohn Forte 174fcf3ce44SJohn Forte /* 175fcf3ce44SJohn Forte * n2h24 - native to host 24 bit integer translation. 176fcf3ce44SJohn Forte */ 177fcf3ce44SJohn Forte static uint32_t 178fcf3ce44SJohn Forte n2h24(uchar_t *ptr) 179fcf3ce44SJohn Forte { 180fcf3ce44SJohn Forte uint32_t idx; 181fcf3ce44SJohn Forte bcopy(ptr, &idx, 3); 182fcf3ce44SJohn Forte return (ntohl(idx) >> 8); 183fcf3ce44SJohn Forte } 184fcf3ce44SJohn Forte 185fcf3ce44SJohn Forte /* 186fcf3ce44SJohn Forte * iscsi_sna_lt - Serial Number Arithmetic, 32 bits, less than, RFC1982 187fcf3ce44SJohn Forte */ 188fcf3ce44SJohn Forte static int 189fcf3ce44SJohn Forte iscsi_sna_lt(uint32_t n1, uint32_t n2) 190fcf3ce44SJohn Forte { 191fcf3ce44SJohn Forte return ((n1 != n2) && 192fcf3ce44SJohn Forte (((n1 < n2) && ((n2 - n1) < ISCSI_SNA32_CHECK)) || 193fcf3ce44SJohn Forte ((n1 > n2) && ((n1 - n2) > ISCSI_SNA32_CHECK)))); 194fcf3ce44SJohn Forte } 195fcf3ce44SJohn Forte 196fcf3ce44SJohn Forte /* 197fcf3ce44SJohn Forte * iscsi_sna_lte - Serial Number Arithmetic, 32 bits, less than or equal, 198fcf3ce44SJohn Forte * RFC1982 199fcf3ce44SJohn Forte */ 200fcf3ce44SJohn Forte int 201fcf3ce44SJohn Forte iscsi_sna_lte(uint32_t n1, uint32_t n2) 202fcf3ce44SJohn Forte { 203fcf3ce44SJohn Forte return ((n1 == n2) || 204fcf3ce44SJohn Forte (((n1 < n2) && ((n2 - n1) < ISCSI_SNA32_CHECK)) || 205fcf3ce44SJohn Forte ((n1 > n2) && ((n1 - n2) > ISCSI_SNA32_CHECK)))); 206fcf3ce44SJohn Forte } 207fcf3ce44SJohn Forte 208fcf3ce44SJohn Forte /* 209fcf3ce44SJohn Forte * iscsi_update_flow_control - Update expcmdsn and maxcmdsn iSCSI 210fcf3ce44SJohn Forte * flow control information for a session 211fcf3ce44SJohn Forte */ 21230e7468fSPeter Dunlap void 213fcf3ce44SJohn Forte iscsi_update_flow_control(iscsi_sess_t *isp, uint32_t max, uint32_t exp) 214fcf3ce44SJohn Forte { 215fcf3ce44SJohn Forte ASSERT(isp != NULL); 216fcf3ce44SJohn Forte ASSERT(mutex_owned(&isp->sess_cmdsn_mutex)); 217fcf3ce44SJohn Forte 218fcf3ce44SJohn Forte if (!iscsi_sna_lt(max, (exp - 1))) { 219fcf3ce44SJohn Forte 220fcf3ce44SJohn Forte if (!iscsi_sna_lte(exp, isp->sess_expcmdsn)) { 221fcf3ce44SJohn Forte isp->sess_expcmdsn = exp; 222fcf3ce44SJohn Forte } 223fcf3ce44SJohn Forte 224fcf3ce44SJohn Forte if (!iscsi_sna_lte(max, isp->sess_maxcmdsn)) { 225fcf3ce44SJohn Forte isp->sess_maxcmdsn = max; 226fcf3ce44SJohn Forte if (iscsi_sna_lte(isp->sess_cmdsn, 227fcf3ce44SJohn Forte isp->sess_maxcmdsn)) { 228fcf3ce44SJohn Forte /* 229fcf3ce44SJohn Forte * the window is open again - schedule 230fcf3ce44SJohn Forte * to send any held tasks soon 231fcf3ce44SJohn Forte */ 232fcf3ce44SJohn Forte iscsi_sess_redrive_io(isp); 233fcf3ce44SJohn Forte } 234fcf3ce44SJohn Forte } 235fcf3ce44SJohn Forte } 236fcf3ce44SJohn Forte } 237fcf3ce44SJohn Forte 238fcf3ce44SJohn Forte 239fcf3ce44SJohn Forte /* 240fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 241fcf3ce44SJohn Forte * | io receive and processing routines | 242fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 243fcf3ce44SJohn Forte */ 244fcf3ce44SJohn Forte 245fcf3ce44SJohn Forte /* 24630e7468fSPeter Dunlap * iscsi_rx_scsi_rsp - called from idm 24730e7468fSPeter Dunlap * For each opcode type fan out the processing. 248fcf3ce44SJohn Forte */ 249fcf3ce44SJohn Forte void 25030e7468fSPeter Dunlap iscsi_rx_scsi_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 251fcf3ce44SJohn Forte { 25230e7468fSPeter Dunlap iscsi_conn_t *icp; 25330e7468fSPeter Dunlap iscsi_sess_t *isp; 25430e7468fSPeter Dunlap iscsi_hdr_t *ihp; 25530e7468fSPeter Dunlap idm_status_t status; 256fcf3ce44SJohn Forte 25730e7468fSPeter Dunlap ASSERT(ic != NULL); 25830e7468fSPeter Dunlap ASSERT(pdu != NULL); 25930e7468fSPeter Dunlap icp = ic->ic_handle; 260fcf3ce44SJohn Forte ASSERT(icp != NULL); 26130e7468fSPeter Dunlap ihp = (iscsi_hdr_t *)pdu->isp_hdr; 262fcf3ce44SJohn Forte ASSERT(ihp != NULL); 26330e7468fSPeter Dunlap isp = icp->conn_sess; 264fcf3ce44SJohn Forte ASSERT(isp != NULL); 265fcf3ce44SJohn Forte 26630e7468fSPeter Dunlap /* reset the session timer when we receive the response */ 26730e7468fSPeter Dunlap isp->sess_rx_lbolt = icp->conn_rx_lbolt = ddi_get_lbolt(); 268fcf3ce44SJohn Forte 269fcf3ce44SJohn Forte /* fan out the hdr processing */ 270fcf3ce44SJohn Forte switch (ihp->opcode & ISCSI_OPCODE_MASK) { 271fcf3ce44SJohn Forte case ISCSI_OP_SCSI_DATA_RSP: 27230e7468fSPeter Dunlap status = iscsi_rx_process_data_rsp(ic, pdu); 273fcf3ce44SJohn Forte break; 274fcf3ce44SJohn Forte case ISCSI_OP_SCSI_RSP: 27530e7468fSPeter Dunlap status = iscsi_rx_process_cmd_rsp(ic, pdu); 27630e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 277fcf3ce44SJohn Forte break; 278fcf3ce44SJohn Forte default: 279fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) protocol error - " 28030e7468fSPeter Dunlap "received pdu with unsupported opcode 0x%02x", 281fcf3ce44SJohn Forte icp->conn_oid, ihp->opcode); 28230e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 283fcf3ce44SJohn Forte } 28430e7468fSPeter Dunlap iscsi_process_rsp_status(isp, icp, status); 285fcf3ce44SJohn Forte } 286fcf3ce44SJohn Forte 28730e7468fSPeter Dunlap void 28830e7468fSPeter Dunlap iscsi_task_cleanup(int opcode, iscsi_cmd_t *icmdp) 289fcf3ce44SJohn Forte { 29030e7468fSPeter Dunlap struct buf *bp; 29130e7468fSPeter Dunlap idm_buf_t *ibp, *obp; 29230e7468fSPeter Dunlap idm_task_t *itp; 293fcf3ce44SJohn Forte 29430e7468fSPeter Dunlap itp = icmdp->cmd_itp; 29530e7468fSPeter Dunlap ASSERT(itp != NULL); 29630e7468fSPeter Dunlap ASSERT((opcode == ISCSI_OP_SCSI_DATA_RSP) || 29730e7468fSPeter Dunlap (opcode == ISCSI_OP_SCSI_RSP)); 298fcf3ce44SJohn Forte 29930e7468fSPeter Dunlap bp = icmdp->cmd_un.scsi.bp; 30030e7468fSPeter Dunlap ibp = icmdp->cmd_un.scsi.ibp_ibuf; 30130e7468fSPeter Dunlap obp = icmdp->cmd_un.scsi.ibp_obuf; 30230e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: task_cleanup: itp: %p opcode: %d " 30330e7468fSPeter Dunlap "icmdp: %p bp: %p ibp: %p", (void *)itp, opcode, 30430e7468fSPeter Dunlap (void *)icmdp, (void *)bp, (void *)ibp); 30530e7468fSPeter Dunlap if (bp && bp->b_bcount) { 30630e7468fSPeter Dunlap if (ibp != NULL && bp->b_flags & B_READ) { 30730e7468fSPeter Dunlap idm_buf_unbind_in(itp, ibp); 30830e7468fSPeter Dunlap idm_buf_free(ibp); 30930e7468fSPeter Dunlap icmdp->cmd_un.scsi.ibp_ibuf = NULL; 31030e7468fSPeter Dunlap } else if (obp != NULL && !(bp->b_flags & B_READ)) { 31130e7468fSPeter Dunlap idm_buf_unbind_out(itp, obp); 31230e7468fSPeter Dunlap idm_buf_free(obp); 31330e7468fSPeter Dunlap icmdp->cmd_un.scsi.ibp_obuf = NULL; 314fcf3ce44SJohn Forte } 315fcf3ce44SJohn Forte } 316fcf3ce44SJohn Forte 31730e7468fSPeter Dunlap idm_task_done(itp); 31830e7468fSPeter Dunlap } 31930e7468fSPeter Dunlap 32030e7468fSPeter Dunlap idm_status_t 32130e7468fSPeter Dunlap iscsi_rx_chk(iscsi_conn_t *icp, iscsi_sess_t *isp, 32230e7468fSPeter Dunlap iscsi_scsi_rsp_hdr_t *irhp, iscsi_cmd_t **icmdp) 32330e7468fSPeter Dunlap { 32430e7468fSPeter Dunlap iscsi_status_t rval; 32530e7468fSPeter Dunlap 326fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 32730e7468fSPeter Dunlap 32830e7468fSPeter Dunlap if (icp->conn_expstatsn == ntohl(irhp->statsn)) { 32930e7468fSPeter Dunlap icp->conn_expstatsn++; 33030e7468fSPeter Dunlap } else { 33130e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi connection(%u/%x) protocol error - " 33230e7468fSPeter Dunlap "received status out of order itt:0x%x statsn:0x%x " 33330e7468fSPeter Dunlap "expstatsn:0x%x", icp->conn_oid, irhp->opcode, 33430e7468fSPeter Dunlap irhp->itt, ntohl(irhp->statsn), icp->conn_expstatsn); 335fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 33630e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 33730e7468fSPeter Dunlap } 33830e7468fSPeter Dunlap 33930e7468fSPeter Dunlap /* get icmdp so we can cleanup on error */ 34030e7468fSPeter Dunlap if ((irhp->opcode == ISCSI_OP_SCSI_DATA_RSP) || 34130e7468fSPeter Dunlap (irhp->opcode == ISCSI_OP_SCSI_RSP)) { 34230e7468fSPeter Dunlap rval = iscsi_rx_process_scsi_itt_to_icmdp(isp, icp->conn_ic, 34330e7468fSPeter Dunlap irhp, icmdp); 34430e7468fSPeter Dunlap } else { 34530e7468fSPeter Dunlap rval = iscsi_rx_process_itt_to_icmdp(isp, 34630e7468fSPeter Dunlap (iscsi_hdr_t *)irhp, icmdp); 34730e7468fSPeter Dunlap } 34830e7468fSPeter Dunlap 34930e7468fSPeter Dunlap if (!ISCSI_SUCCESS(rval)) { 35030e7468fSPeter Dunlap mutex_exit(&isp->sess_cmdsn_mutex); 35130e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 352fcf3ce44SJohn Forte } 353fcf3ce44SJohn Forte 354fcf3ce44SJohn Forte /* update expcmdsn and maxcmdsn */ 35530e7468fSPeter Dunlap iscsi_update_flow_control(isp, ntohl(irhp->maxcmdsn), 35630e7468fSPeter Dunlap ntohl(irhp->expcmdsn)); 357fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 35830e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 35930e7468fSPeter Dunlap } 360fcf3ce44SJohn Forte 36130e7468fSPeter Dunlap static void 36230e7468fSPeter Dunlap iscsi_cmd_rsp_chk(iscsi_cmd_t *icmdp, iscsi_scsi_rsp_hdr_t *issrhp) 36330e7468fSPeter Dunlap { 36430e7468fSPeter Dunlap struct scsi_pkt *pkt; 36530e7468fSPeter Dunlap size_t data_transferred; 366fcf3ce44SJohn Forte 36730e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 36830e7468fSPeter Dunlap pkt->pkt_resid = 0; 36930e7468fSPeter Dunlap data_transferred = icmdp->cmd_un.scsi.data_transferred; 37030e7468fSPeter Dunlap /* Check the residual count */ 37130e7468fSPeter Dunlap if ((icmdp->cmd_un.scsi.bp) && 37230e7468fSPeter Dunlap (data_transferred != icmdp->cmd_un.scsi.bp->b_bcount)) { 373fcf3ce44SJohn Forte /* 37430e7468fSPeter Dunlap * We didn't xfer the expected amount of data - 37530e7468fSPeter Dunlap * the residual_count in the header is only 37630e7468fSPeter Dunlap * valid if the underflow flag is set. 377fcf3ce44SJohn Forte */ 37830e7468fSPeter Dunlap if (issrhp->flags & ISCSI_FLAG_CMD_UNDERFLOW) { 37930e7468fSPeter Dunlap pkt->pkt_resid = ntohl(issrhp->residual_count); 38030e7468fSPeter Dunlap } else { 38130e7468fSPeter Dunlap if (icmdp->cmd_un.scsi.bp->b_bcount > 38230e7468fSPeter Dunlap data_transferred) { 38330e7468fSPeter Dunlap /* 38430e7468fSPeter Dunlap * Some data fell on the floor 38530e7468fSPeter Dunlap * somehow - probably a CRC error 38630e7468fSPeter Dunlap */ 38730e7468fSPeter Dunlap pkt->pkt_resid = 38830e7468fSPeter Dunlap icmdp->cmd_un.scsi.bp->b_bcount - 38930e7468fSPeter Dunlap data_transferred; 39030e7468fSPeter Dunlap } 391fcf3ce44SJohn Forte } 39230e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, 39330e7468fSPeter Dunlap "DEBUG: iscsi_rx_cmd_rsp_chk: itt: %u" 39430e7468fSPeter Dunlap "data_trans != b_count data_transferred: %lu " 39530e7468fSPeter Dunlap "b_count: %lu cmd_status: %d flags: %d resid: %lu", 39630e7468fSPeter Dunlap issrhp->itt, data_transferred, 39730e7468fSPeter Dunlap icmdp->cmd_un.scsi.bp->b_bcount, 39830e7468fSPeter Dunlap issrhp->cmd_status & STATUS_MASK, 39930e7468fSPeter Dunlap issrhp->flags, pkt->pkt_resid); 40030e7468fSPeter Dunlap } 40130e7468fSPeter Dunlap /* set flags that tell SCSA that the command is complete */ 40230e7468fSPeter Dunlap if (icmdp->cmd_crc_error_seen == B_FALSE) { 40330e7468fSPeter Dunlap /* Set successful completion */ 40430e7468fSPeter Dunlap pkt->pkt_reason = CMD_CMPLT; 40530e7468fSPeter Dunlap if (icmdp->cmd_un.scsi.bp) { 40630e7468fSPeter Dunlap pkt->pkt_state |= (STATE_XFERRED_DATA | 40730e7468fSPeter Dunlap STATE_GOT_STATUS); 40830e7468fSPeter Dunlap } else { 40930e7468fSPeter Dunlap pkt->pkt_state |= STATE_GOT_STATUS; 41030e7468fSPeter Dunlap } 41130e7468fSPeter Dunlap } else { 412fcf3ce44SJohn Forte /* 41330e7468fSPeter Dunlap * Some of the data was found to have an incorrect 41430e7468fSPeter Dunlap * error at the protocol error. 415fcf3ce44SJohn Forte */ 41630e7468fSPeter Dunlap pkt->pkt_reason = CMD_PER_FAIL; 41730e7468fSPeter Dunlap pkt->pkt_statistics |= STAT_PERR; 41830e7468fSPeter Dunlap if (icmdp->cmd_un.scsi.bp) { 41930e7468fSPeter Dunlap pkt->pkt_resid = 42030e7468fSPeter Dunlap icmdp->cmd_un.scsi.bp->b_bcount; 421fcf3ce44SJohn Forte } else { 42230e7468fSPeter Dunlap pkt->pkt_resid = 0; 423fcf3ce44SJohn Forte } 424fcf3ce44SJohn Forte } 42530e7468fSPeter Dunlap } 42630e7468fSPeter Dunlap 42730e7468fSPeter Dunlap static void 42830e7468fSPeter Dunlap iscsi_cmd_rsp_cmd_status(iscsi_cmd_t *icmdp, iscsi_scsi_rsp_hdr_t *issrhp, 42930e7468fSPeter Dunlap uint8_t *data) 43030e7468fSPeter Dunlap { 431*5279807dSJack Meng int32_t dlength = 0; 43230e7468fSPeter Dunlap struct scsi_arq_status *arqstat = NULL; 43330e7468fSPeter Dunlap size_t senselen = 0; 434*5279807dSJack Meng int32_t statuslen = 0; 435*5279807dSJack Meng int32_t senselen_to = 0; 43630e7468fSPeter Dunlap struct scsi_pkt *pkt; 43730e7468fSPeter Dunlap 43830e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 43930e7468fSPeter Dunlap dlength = n2h24(issrhp->dlength); 440fcf3ce44SJohn Forte 441fcf3ce44SJohn Forte /* 44230e7468fSPeter Dunlap * Process iSCSI Cmd Response Status 44330e7468fSPeter Dunlap * RFC 3720 Sectionn 10.4.2. 444fcf3ce44SJohn Forte */ 44530e7468fSPeter Dunlap switch (issrhp->cmd_status & STATUS_MASK) { 44630e7468fSPeter Dunlap case STATUS_GOOD: 44730e7468fSPeter Dunlap /* pass SCSI status up stack */ 44830e7468fSPeter Dunlap if (pkt->pkt_scbp) { 44930e7468fSPeter Dunlap pkt->pkt_scbp[0] = issrhp->cmd_status; 45030e7468fSPeter Dunlap } 45130e7468fSPeter Dunlap break; 45230e7468fSPeter Dunlap case STATUS_CHECK: 45330e7468fSPeter Dunlap /* 45430e7468fSPeter Dunlap * Verify we received a sense buffer and 45530e7468fSPeter Dunlap * that there is the correct amount of 45630e7468fSPeter Dunlap * request sense space to copy it to. 45730e7468fSPeter Dunlap */ 45830e7468fSPeter Dunlap if ((dlength > 1) && 45930e7468fSPeter Dunlap (pkt->pkt_scbp != NULL) && 46030e7468fSPeter Dunlap (icmdp->cmd_un.scsi.statuslen >= 46130e7468fSPeter Dunlap sizeof (struct scsi_arq_status))) { 462fcf3ce44SJohn Forte /* 46330e7468fSPeter Dunlap * If a bad command status is received we 46430e7468fSPeter Dunlap * need to reset the pkt_resid to zero. 46530e7468fSPeter Dunlap * The target driver compares its value 46630e7468fSPeter Dunlap * before checking other error flags. 46730e7468fSPeter Dunlap * (ex. check conditions) 468fcf3ce44SJohn Forte */ 46930e7468fSPeter Dunlap pkt->pkt_resid = 0; 47030e7468fSPeter Dunlap 47130e7468fSPeter Dunlap /* get sense length from first 2 bytes */ 47230e7468fSPeter Dunlap senselen = ((data[0] << 8) | data[1]) & 47330e7468fSPeter Dunlap (size_t)0xFFFF; 47430e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, 47530e7468fSPeter Dunlap "DEBUG: iscsi_rx_cmd_rsp_cmd_status status_check: " 47630e7468fSPeter Dunlap "dlen: %d scbp: %p statuslen: %d arq: %d senselen:" 47730e7468fSPeter Dunlap " %lu", dlength, (void *)pkt->pkt_scbp, 47830e7468fSPeter Dunlap icmdp->cmd_un.scsi.statuslen, 47930e7468fSPeter Dunlap (int)sizeof (struct scsi_arq_status), 48030e7468fSPeter Dunlap senselen); 48130e7468fSPeter Dunlap 48230e7468fSPeter Dunlap /* Sanity-check on the sense length */ 48330e7468fSPeter Dunlap if ((senselen + 2) > dlength) { 48430e7468fSPeter Dunlap senselen = dlength - 2; 485fcf3ce44SJohn Forte } 486fcf3ce44SJohn Forte 48730e7468fSPeter Dunlap /* 48830e7468fSPeter Dunlap * If there was a Data Digest error then 48930e7468fSPeter Dunlap * the sense data cannot be trusted. 49030e7468fSPeter Dunlap */ 49130e7468fSPeter Dunlap if (icmdp->cmd_crc_error_seen) { 49230e7468fSPeter Dunlap senselen = 0; 49330e7468fSPeter Dunlap } 494fcf3ce44SJohn Forte 49530e7468fSPeter Dunlap /* automatic request sense */ 49630e7468fSPeter Dunlap arqstat = 49730e7468fSPeter Dunlap (struct scsi_arq_status *)pkt->pkt_scbp; 49830e7468fSPeter Dunlap 49930e7468fSPeter Dunlap /* pass SCSI status up stack */ 50030e7468fSPeter Dunlap *((uchar_t *)&arqstat->sts_status) = 50130e7468fSPeter Dunlap issrhp->cmd_status; 502fcf3ce44SJohn Forte 503fcf3ce44SJohn Forte /* 50430e7468fSPeter Dunlap * Set the status for the automatic 50530e7468fSPeter Dunlap * request sense command 506fcf3ce44SJohn Forte */ 50730e7468fSPeter Dunlap arqstat->sts_rqpkt_state = (STATE_GOT_BUS | 50830e7468fSPeter Dunlap STATE_GOT_TARGET | STATE_SENT_CMD | 50930e7468fSPeter Dunlap STATE_XFERRED_DATA | STATE_GOT_STATUS | 51030e7468fSPeter Dunlap STATE_ARQ_DONE); 511fcf3ce44SJohn Forte 51230e7468fSPeter Dunlap *((uchar_t *)&arqstat->sts_rqpkt_status) = 51330e7468fSPeter Dunlap STATUS_GOOD; 514fcf3ce44SJohn Forte 51530e7468fSPeter Dunlap arqstat->sts_rqpkt_reason = CMD_CMPLT; 51630e7468fSPeter Dunlap statuslen = icmdp->cmd_un.scsi.statuslen; 517fcf3ce44SJohn Forte 51830e7468fSPeter Dunlap if (senselen == 0) { 51930e7468fSPeter Dunlap /* auto request sense failed */ 52030e7468fSPeter Dunlap arqstat->sts_rqpkt_status.sts_chk = 1; 52130e7468fSPeter Dunlap arqstat->sts_rqpkt_resid = statuslen; 52230e7468fSPeter Dunlap } else if (senselen < statuslen) { 52330e7468fSPeter Dunlap /* auto request sense short */ 52430e7468fSPeter Dunlap arqstat->sts_rqpkt_resid = statuslen - senselen; 52530e7468fSPeter Dunlap } else { 52630e7468fSPeter Dunlap /* auto request sense complete */ 52730e7468fSPeter Dunlap arqstat->sts_rqpkt_resid = 0; 52830e7468fSPeter Dunlap } 52930e7468fSPeter Dunlap arqstat->sts_rqpkt_statistics = 0; 53030e7468fSPeter Dunlap pkt->pkt_state |= STATE_ARQ_DONE; 531fcf3ce44SJohn Forte 53230e7468fSPeter Dunlap if (icmdp->cmd_misc_flags & ISCSI_CMD_MISCFLAG_XARQ) { 53330e7468fSPeter Dunlap pkt->pkt_state |= STATE_XARQ_DONE; 53430e7468fSPeter Dunlap } 53530e7468fSPeter Dunlap 536*5279807dSJack Meng senselen_to = pkt->pkt_scblen - 537*5279807dSJack Meng sizeof (struct scsi_arq_status) + 538*5279807dSJack Meng sizeof (struct scsi_extended_sense); 539*5279807dSJack Meng 54030e7468fSPeter Dunlap /* copy auto request sense */ 541*5279807dSJack Meng dlength = min(senselen, senselen_to); 542*5279807dSJack Meng if (dlength > 0) { 54330e7468fSPeter Dunlap bcopy(&data[2], (uchar_t *)&arqstat-> 54430e7468fSPeter Dunlap sts_sensedata, dlength); 54530e7468fSPeter Dunlap } 54630e7468fSPeter Dunlap break; 547fcf3ce44SJohn Forte } 54830e7468fSPeter Dunlap /* FALLTHRU */ 54930e7468fSPeter Dunlap case STATUS_BUSY: 55030e7468fSPeter Dunlap case STATUS_RESERVATION_CONFLICT: 55130e7468fSPeter Dunlap case STATUS_QFULL: 55230e7468fSPeter Dunlap case STATUS_ACA_ACTIVE: 55330e7468fSPeter Dunlap default: 55430e7468fSPeter Dunlap /* 55530e7468fSPeter Dunlap * If a bad command status is received we need to 55630e7468fSPeter Dunlap * reset the pkt_resid to zero. The target driver 55730e7468fSPeter Dunlap * compares its value before checking other error 55830e7468fSPeter Dunlap * flags. (ex. check conditions) 55930e7468fSPeter Dunlap */ 56030e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, 56130e7468fSPeter Dunlap "DEBUG: iscsi_rx_cmd_rsp_cmd_status: status: " 56230e7468fSPeter Dunlap "%d cmd_status: %d dlen: %u scbp: %p statuslen: %d " 56330e7468fSPeter Dunlap "arg_len: %d", issrhp->cmd_status & STATUS_MASK, 56430e7468fSPeter Dunlap issrhp->cmd_status, dlength, (void *)pkt->pkt_scbp, 56530e7468fSPeter Dunlap icmdp->cmd_un.scsi.statuslen, 56630e7468fSPeter Dunlap (int)sizeof (struct scsi_arq_status)); 56730e7468fSPeter Dunlap pkt->pkt_resid = 0; 56830e7468fSPeter Dunlap /* pass SCSI status up stack */ 56930e7468fSPeter Dunlap if (pkt->pkt_scbp) { 57030e7468fSPeter Dunlap pkt->pkt_scbp[0] = issrhp->cmd_status; 57130e7468fSPeter Dunlap } 57230e7468fSPeter Dunlap } 57330e7468fSPeter Dunlap } 574fcf3ce44SJohn Forte 57530e7468fSPeter Dunlap /* 57630e7468fSPeter Dunlap * iscsi_rx_process_login_pdup - Process login response PDU. This function 57730e7468fSPeter Dunlap * copies the data into the connection context so that the login code can 57830e7468fSPeter Dunlap * interpret it. 57930e7468fSPeter Dunlap */ 58030e7468fSPeter Dunlap 58130e7468fSPeter Dunlap idm_status_t 58230e7468fSPeter Dunlap iscsi_rx_process_login_pdu(idm_conn_t *ic, idm_pdu_t *pdu) 58330e7468fSPeter Dunlap { 58430e7468fSPeter Dunlap iscsi_conn_t *icp; 58530e7468fSPeter Dunlap 58630e7468fSPeter Dunlap icp = ic->ic_handle; 58730e7468fSPeter Dunlap 58830e7468fSPeter Dunlap /* 58930e7468fSPeter Dunlap * Copy header and data into connection structure so iscsi_login() 59030e7468fSPeter Dunlap * can process it. 59130e7468fSPeter Dunlap */ 59230e7468fSPeter Dunlap mutex_enter(&icp->conn_login_mutex); 59330e7468fSPeter Dunlap /* 59430e7468fSPeter Dunlap * If conn_login_state != LOGIN_TX then we are not ready to handle 59530e7468fSPeter Dunlap * this login response and we should just drop it. 59630e7468fSPeter Dunlap */ 59730e7468fSPeter Dunlap if (icp->conn_login_state == LOGIN_TX) { 59830e7468fSPeter Dunlap icp->conn_login_datalen = pdu->isp_datalen; 59930e7468fSPeter Dunlap bcopy(pdu->isp_hdr, &icp->conn_login_resp_hdr, 60030e7468fSPeter Dunlap sizeof (iscsi_hdr_t)); 60130e7468fSPeter Dunlap /* 60230e7468fSPeter Dunlap * Login code is sloppy with it's NULL handling so make sure 60330e7468fSPeter Dunlap * we don't leave any stale data in there. 60430e7468fSPeter Dunlap */ 60530e7468fSPeter Dunlap bzero(icp->conn_login_data, icp->conn_login_max_data_length); 60630e7468fSPeter Dunlap bcopy(pdu->isp_data, icp->conn_login_data, 60730e7468fSPeter Dunlap MIN(pdu->isp_datalen, icp->conn_login_max_data_length)); 60830e7468fSPeter Dunlap iscsi_login_update_state_locked(icp, LOGIN_RX); 609fcf3ce44SJohn Forte } 61030e7468fSPeter Dunlap mutex_exit(&icp->conn_login_mutex); 611fcf3ce44SJohn Forte 61230e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 613fcf3ce44SJohn Forte } 614fcf3ce44SJohn Forte 615fcf3ce44SJohn Forte /* 616fcf3ce44SJohn Forte * iscsi_rx_process_cmd_rsp - Process received scsi command response. This 617fcf3ce44SJohn Forte * will contain sense data if the command was not successful. This data needs 618fcf3ce44SJohn Forte * to be copied into the scsi_pkt. Otherwise we just complete the IO. 619fcf3ce44SJohn Forte */ 62030e7468fSPeter Dunlap static idm_status_t 62130e7468fSPeter Dunlap iscsi_rx_process_cmd_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 622fcf3ce44SJohn Forte { 62330e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 62430e7468fSPeter Dunlap iscsi_sess_t *isp = icp->conn_sess; 62530e7468fSPeter Dunlap iscsi_scsi_rsp_hdr_t *issrhp = (iscsi_scsi_rsp_hdr_t *)pdu->isp_hdr; 62630e7468fSPeter Dunlap uint8_t *data = pdu->isp_data; 62730e7468fSPeter Dunlap iscsi_cmd_t *icmdp = NULL; 62830e7468fSPeter Dunlap struct scsi_pkt *pkt = NULL; 62930e7468fSPeter Dunlap idm_status_t rval; 63030e7468fSPeter Dunlap struct buf *bp; 631fcf3ce44SJohn Forte 632fcf3ce44SJohn Forte /* make sure we get status in order */ 63330e7468fSPeter Dunlap mutex_enter(&icp->conn_queue_active.mutex); 63430e7468fSPeter Dunlap 63530e7468fSPeter Dunlap if ((rval = iscsi_rx_chk(icp, isp, issrhp, 63630e7468fSPeter Dunlap &icmdp)) != IDM_STATUS_SUCCESS) { 63730e7468fSPeter Dunlap if (icmdp != NULL) { 63830e7468fSPeter Dunlap iscsi_task_cleanup(issrhp->opcode, icmdp); 63930e7468fSPeter Dunlap } 64030e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 64130e7468fSPeter Dunlap return (rval); 642fcf3ce44SJohn Forte } 643fcf3ce44SJohn Forte 64430e7468fSPeter Dunlap /* 64530e7468fSPeter Dunlap * If we are in "idm aborting" state then we shouldn't continue 64630e7468fSPeter Dunlap * to process this command. By definition this command is no longer 64730e7468fSPeter Dunlap * on the active queue so we shouldn't try to remove it either. 64830e7468fSPeter Dunlap */ 64930e7468fSPeter Dunlap mutex_enter(&icmdp->cmd_mutex); 65030e7468fSPeter Dunlap if (icmdp->cmd_state == ISCSI_CMD_STATE_IDM_ABORTING) { 65130e7468fSPeter Dunlap mutex_exit(&icmdp->cmd_mutex); 652fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 65330e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 654fcf3ce44SJohn Forte } 65530e7468fSPeter Dunlap mutex_exit(&icmdp->cmd_mutex); 656fcf3ce44SJohn Forte 65730e7468fSPeter Dunlap /* Get the IDM buffer and bytes transferred */ 65830e7468fSPeter Dunlap bp = icmdp->cmd_un.scsi.bp; 65930e7468fSPeter Dunlap if (ic->ic_conn_flags & IDM_CONN_USE_SCOREBOARD) { 66030e7468fSPeter Dunlap /* Transport tracks bytes transferred so use those counts */ 66130e7468fSPeter Dunlap if (bp && (bp->b_flags & B_READ)) { 66230e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred += 66330e7468fSPeter Dunlap icmdp->cmd_itp->idt_rx_bytes; 66430e7468fSPeter Dunlap } else { 66530e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred += 66630e7468fSPeter Dunlap icmdp->cmd_itp->idt_tx_bytes; 66730e7468fSPeter Dunlap } 66830e7468fSPeter Dunlap } else { 66930e7468fSPeter Dunlap /* 67030e7468fSPeter Dunlap * Some transports cannot track the bytes transferred on 67130e7468fSPeter Dunlap * the initiator side (like iSER) so we have to use the 67230e7468fSPeter Dunlap * status info. If the response field indicates that 67330e7468fSPeter Dunlap * the command actually completed then we will assume 67430e7468fSPeter Dunlap * the data_transferred value represents the entire buffer 67530e7468fSPeter Dunlap * unless the resid field says otherwise. This is a bit 67630e7468fSPeter Dunlap * unintuitive but it's really impossible to know what 67730e7468fSPeter Dunlap * has been transferred without detailed consideration 67830e7468fSPeter Dunlap * of the SCSI status and sense key and that is outside 67930e7468fSPeter Dunlap * the scope of the transport. Instead the target/class driver 68030e7468fSPeter Dunlap * can consider these values along with the resid and figure 68130e7468fSPeter Dunlap * it out. The data_transferred concept is just belt and 68230e7468fSPeter Dunlap * suspenders anyway -- RFC 3720 actually explicitly rejects 68330e7468fSPeter Dunlap * scoreboarding ("Initiators SHOULD NOT keep track of the 68430e7468fSPeter Dunlap * data transferred to or from the target (scoreboarding)") 68530e7468fSPeter Dunlap * perhaps for this very reason. 68630e7468fSPeter Dunlap */ 68730e7468fSPeter Dunlap if (issrhp->response != 0) { 68830e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred = 0; 68930e7468fSPeter Dunlap } else { 69030e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred = 69130e7468fSPeter Dunlap (bp == NULL) ? 0 : bp->b_bcount; 69230e7468fSPeter Dunlap if (issrhp->flags & ISCSI_FLAG_CMD_UNDERFLOW) { 69330e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred -= 69430e7468fSPeter Dunlap ntohl(issrhp->residual_count); 69530e7468fSPeter Dunlap } 69630e7468fSPeter Dunlap } 69730e7468fSPeter Dunlap } 698fcf3ce44SJohn Forte 69930e7468fSPeter Dunlap ISCSI_CHECK_SCSI_READ(icmdp, issrhp, 70030e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred, 70130e7468fSPeter Dunlap BP_CHECK_THOROUGH); 70230e7468fSPeter Dunlap 70330e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: rx_process_cmd_rsp: ic: %p pdu: %p itt:" 70430e7468fSPeter Dunlap " %x expcmdsn: %x sess_cmd: %x sess_expcmdsn: %x data_transfered:" 70530e7468fSPeter Dunlap " %lu ibp: %p obp: %p", (void *)ic, (void *)pdu, issrhp->itt, 70630e7468fSPeter Dunlap issrhp->expcmdsn, isp->sess_cmdsn, isp->sess_expcmdsn, 70730e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred, 70830e7468fSPeter Dunlap (void *)icmdp->cmd_un.scsi.ibp_ibuf, 70930e7468fSPeter Dunlap (void *)icmdp->cmd_un.scsi.ibp_obuf); 71030e7468fSPeter Dunlap 71130e7468fSPeter Dunlap iscsi_task_cleanup(issrhp->opcode, icmdp); 712fcf3ce44SJohn Forte 713fcf3ce44SJohn Forte if (issrhp->response) { 714fcf3ce44SJohn Forte /* The target failed the command. */ 71530e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: rx_process_cmd_rsp: ic: %p pdu:" 71630e7468fSPeter Dunlap " %p response: %d bcount: %lu", (void *)ic, (void *)pdu, 71730e7468fSPeter Dunlap issrhp->response, icmdp->cmd_un.scsi.bp->b_bcount); 71830e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 719fcf3ce44SJohn Forte pkt->pkt_reason = CMD_TRAN_ERR; 720fcf3ce44SJohn Forte if (icmdp->cmd_un.scsi.bp) { 721fcf3ce44SJohn Forte pkt->pkt_resid = icmdp->cmd_un.scsi.bp->b_bcount; 722fcf3ce44SJohn Forte } else { 723fcf3ce44SJohn Forte pkt->pkt_resid = 0; 724fcf3ce44SJohn Forte } 725fcf3ce44SJohn Forte } else { 726fcf3ce44SJohn Forte /* success */ 72730e7468fSPeter Dunlap iscsi_cmd_rsp_chk(icmdp, issrhp); 72830e7468fSPeter Dunlap iscsi_cmd_rsp_cmd_status(icmdp, issrhp, data); 72930e7468fSPeter Dunlap } 730fcf3ce44SJohn Forte 73130e7468fSPeter Dunlap iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E3, isp); 73230e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 73330e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 73430e7468fSPeter Dunlap } 735fcf3ce44SJohn Forte 73630e7468fSPeter Dunlap static void 73730e7468fSPeter Dunlap iscsi_data_rsp_pkt(iscsi_cmd_t *icmdp, iscsi_data_rsp_hdr_t *idrhp) 73830e7468fSPeter Dunlap { 73930e7468fSPeter Dunlap struct buf *bp = NULL; 74030e7468fSPeter Dunlap size_t data_transferred; 74130e7468fSPeter Dunlap struct scsi_pkt *pkt; 742fcf3ce44SJohn Forte 74330e7468fSPeter Dunlap bp = icmdp->cmd_un.scsi.bp; 74430e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 74530e7468fSPeter Dunlap data_transferred = icmdp->cmd_un.scsi.data_transferred; 74630e7468fSPeter Dunlap /* 74730e7468fSPeter Dunlap * The command* must be completed now, since we won't get a command 74830e7468fSPeter Dunlap * response PDU. The cmd_status and residual_count are 74930e7468fSPeter Dunlap * not meaningful unless status_present is set. 75030e7468fSPeter Dunlap */ 75130e7468fSPeter Dunlap pkt->pkt_resid = 0; 75230e7468fSPeter Dunlap /* Check the residual count */ 75330e7468fSPeter Dunlap if (bp && (data_transferred != bp->b_bcount)) { 754fcf3ce44SJohn Forte /* 75530e7468fSPeter Dunlap * We didn't xfer the expected amount of data - 75630e7468fSPeter Dunlap * the residual_count in the header is only valid 75730e7468fSPeter Dunlap * if the underflow flag is set. 758fcf3ce44SJohn Forte */ 75930e7468fSPeter Dunlap if (idrhp->flags & ISCSI_FLAG_DATA_UNDERFLOW) { 76030e7468fSPeter Dunlap pkt->pkt_resid = ntohl(idrhp->residual_count); 76130e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: iscsi_data_rsp_pkt: " 76230e7468fSPeter Dunlap "underflow: itt: %d " 76330e7468fSPeter Dunlap "transferred: %lu count: %lu", idrhp->itt, 76430e7468fSPeter Dunlap data_transferred, bp->b_bcount); 76530e7468fSPeter Dunlap } else { 76630e7468fSPeter Dunlap if (bp->b_bcount > data_transferred) { 76730e7468fSPeter Dunlap /* Some data fell on the floor somehw */ 76830e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: " 76930e7468fSPeter Dunlap "iscsi_data_rsp_pkt: data fell: itt: %d " 77030e7468fSPeter Dunlap "transferred: %lu count: %lu", idrhp->itt, 77130e7468fSPeter Dunlap data_transferred, bp->b_bcount); 77230e7468fSPeter Dunlap pkt->pkt_resid = 77330e7468fSPeter Dunlap bp->b_bcount - data_transferred; 774fcf3ce44SJohn Forte } 77530e7468fSPeter Dunlap } 77630e7468fSPeter Dunlap } 777fcf3ce44SJohn Forte 77830e7468fSPeter Dunlap pkt->pkt_reason = CMD_CMPLT; 77930e7468fSPeter Dunlap pkt->pkt_state |= (STATE_XFERRED_DATA | STATE_GOT_STATUS); 780fcf3ce44SJohn Forte 78130e7468fSPeter Dunlap if (((idrhp->cmd_status & STATUS_MASK) != STATUS_GOOD) && 78230e7468fSPeter Dunlap (icmdp->cmd_un.scsi.statuslen >= 78330e7468fSPeter Dunlap sizeof (struct scsi_arq_status)) && pkt->pkt_scbp) { 784fcf3ce44SJohn Forte 78530e7468fSPeter Dunlap /* 78630e7468fSPeter Dunlap * Not supposed to get exception status here! 78730e7468fSPeter Dunlap * We have no request sense data so just do the 78830e7468fSPeter Dunlap * best we can 78930e7468fSPeter Dunlap */ 79030e7468fSPeter Dunlap struct scsi_arq_status *arqstat = 79130e7468fSPeter Dunlap (struct scsi_arq_status *)pkt->pkt_scbp; 792fcf3ce44SJohn Forte 793fcf3ce44SJohn Forte 79430e7468fSPeter Dunlap bzero(arqstat, sizeof (struct scsi_arq_status)); 795fcf3ce44SJohn Forte 79630e7468fSPeter Dunlap *((uchar_t *)&arqstat->sts_status) = 79730e7468fSPeter Dunlap idrhp->cmd_status; 798fcf3ce44SJohn Forte 79930e7468fSPeter Dunlap arqstat->sts_rqpkt_resid = 80030e7468fSPeter Dunlap sizeof (struct scsi_extended_sense); 80130e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: iscsi_data_rsp_pkt: " 80230e7468fSPeter Dunlap "exception status: itt: %d resid: %d", 80330e7468fSPeter Dunlap idrhp->itt, arqstat->sts_rqpkt_resid); 804b4243054SSheng-Liang Eric Zhang 80530e7468fSPeter Dunlap } else if (pkt->pkt_scbp) { 80630e7468fSPeter Dunlap /* just pass along the status we got */ 80730e7468fSPeter Dunlap pkt->pkt_scbp[0] = idrhp->cmd_status; 808fcf3ce44SJohn Forte } 809fcf3ce44SJohn Forte } 810fcf3ce44SJohn Forte 811fcf3ce44SJohn Forte /* 81230e7468fSPeter Dunlap * iscsi_rx_process_data_rsp - 81330e7468fSPeter Dunlap * This currently processes the final data sequence denoted by the data response 81430e7468fSPeter Dunlap * PDU Status bit being set. We will not receive the SCSI response. 81530e7468fSPeter Dunlap * This bit denotes that the PDU is the successful completion of the 81630e7468fSPeter Dunlap * command. 817fcf3ce44SJohn Forte */ 81830e7468fSPeter Dunlap static idm_status_t 81930e7468fSPeter Dunlap iscsi_rx_process_data_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 820fcf3ce44SJohn Forte { 82130e7468fSPeter Dunlap iscsi_sess_t *isp = NULL; 82230e7468fSPeter Dunlap iscsi_data_rsp_hdr_t *idrhp = (iscsi_data_rsp_hdr_t *)pdu->isp_hdr; 82330e7468fSPeter Dunlap iscsi_cmd_t *icmdp = NULL; 82430e7468fSPeter Dunlap struct buf *bp = NULL; 82530e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 82630e7468fSPeter Dunlap idm_buf_t *ibp; 82730e7468fSPeter Dunlap idm_status_t rval; 828fcf3ce44SJohn Forte 829fcf3ce44SJohn Forte 83030e7468fSPeter Dunlap /* should only call this when the data rsp contains final rsp */ 83130e7468fSPeter Dunlap ASSERT(idrhp->flags & ISCSI_FLAG_DATA_STATUS); 83230e7468fSPeter Dunlap isp = icp->conn_sess; 83330e7468fSPeter Dunlap 834fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 83530e7468fSPeter Dunlap if ((rval = iscsi_rx_chk(icp, isp, (iscsi_scsi_rsp_hdr_t *)idrhp, 83630e7468fSPeter Dunlap &icmdp)) != IDM_STATUS_SUCCESS) { 83730e7468fSPeter Dunlap if (icmdp != NULL) { 83830e7468fSPeter Dunlap iscsi_task_cleanup(idrhp->opcode, icmdp); 83930e7468fSPeter Dunlap } 840fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 84130e7468fSPeter Dunlap return (rval); 842fcf3ce44SJohn Forte } 843fcf3ce44SJohn Forte 84430e7468fSPeter Dunlap /* 84530e7468fSPeter Dunlap * If we are in "idm aborting" state then we shouldn't continue 84630e7468fSPeter Dunlap * to process this command. By definition this command is no longer 84730e7468fSPeter Dunlap * on the active queue so we shouldn't try to remove it either. 84830e7468fSPeter Dunlap */ 849fcf3ce44SJohn Forte mutex_enter(&icmdp->cmd_mutex); 85030e7468fSPeter Dunlap if (icmdp->cmd_state == ISCSI_CMD_STATE_IDM_ABORTING) { 85130e7468fSPeter Dunlap mutex_exit(&icmdp->cmd_mutex); 85230e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 85330e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 85430e7468fSPeter Dunlap } 85530e7468fSPeter Dunlap mutex_exit(&icmdp->cmd_mutex); 85630e7468fSPeter Dunlap 85730e7468fSPeter Dunlap /* 85830e7468fSPeter Dunlap * Holding the pending/active queue locks across the 85930e7468fSPeter Dunlap * iscsi_rx_data call later in this function may cause 86030e7468fSPeter Dunlap * deadlock during fault injections. Instead remove 86130e7468fSPeter Dunlap * the cmd from the active queue and release the locks. 86230e7468fSPeter Dunlap * Then before returning or completing the command 86330e7468fSPeter Dunlap * return the cmd to the active queue and reacquire 86430e7468fSPeter Dunlap * the locks. 86530e7468fSPeter Dunlap */ 86630e7468fSPeter Dunlap iscsi_dequeue_active_cmd(icp, icmdp); 86730e7468fSPeter Dunlap 86830e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 869fcf3ce44SJohn Forte 87030e7468fSPeter Dunlap /* shorthand some values */ 871fcf3ce44SJohn Forte bp = icmdp->cmd_un.scsi.bp; 872fcf3ce44SJohn Forte 87330e7468fSPeter Dunlap /* 87430e7468fSPeter Dunlap * some poorly behaved targets have been observed 87530e7468fSPeter Dunlap * sending data-in pdu's during a write operation 87630e7468fSPeter Dunlap */ 87730e7468fSPeter Dunlap if (bp != NULL) { 87830e7468fSPeter Dunlap if (!(bp->b_flags & B_READ)) { 87930e7468fSPeter Dunlap cmn_err(CE_WARN, 88030e7468fSPeter Dunlap "iscsi connection(%u) protocol error - " 88130e7468fSPeter Dunlap "received data response during write operation " 88230e7468fSPeter Dunlap "itt:0x%x", 88330e7468fSPeter Dunlap icp->conn_oid, idrhp->itt); 88430e7468fSPeter Dunlap mutex_enter(&icp->conn_queue_active.mutex); 88530e7468fSPeter Dunlap iscsi_enqueue_active_cmd(icp, icmdp); 88630e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 88730e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 88830e7468fSPeter Dunlap } 88930e7468fSPeter Dunlap } 89030e7468fSPeter Dunlap 89130e7468fSPeter Dunlap ibp = icmdp->cmd_un.scsi.ibp_ibuf; 89230e7468fSPeter Dunlap if (ibp == NULL) { 89330e7468fSPeter Dunlap /* 89430e7468fSPeter Dunlap * After the check of bp above we *should* have a corresponding 89530e7468fSPeter Dunlap * idm_buf_t (ibp). It's possible that the original call 89630e7468fSPeter Dunlap * to idm_buf_alloc failed due to a pending connection state 89730e7468fSPeter Dunlap * transition in which case this value can be NULL. It's 89830e7468fSPeter Dunlap * highly unlikely that the connection would be shutting down 89930e7468fSPeter Dunlap * *and* we manage to process a data response and get to this 90030e7468fSPeter Dunlap * point in the code but just in case we should check for it. 90130e7468fSPeter Dunlap * This isn't really a protocol error -- we are almost certainly 90230e7468fSPeter Dunlap * closing the connection anyway so just return a generic error. 90330e7468fSPeter Dunlap */ 90430e7468fSPeter Dunlap mutex_enter(&icp->conn_queue_active.mutex); 90530e7468fSPeter Dunlap iscsi_enqueue_active_cmd(icp, icmdp); 90630e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 90730e7468fSPeter Dunlap return (IDM_STATUS_FAIL); 90830e7468fSPeter Dunlap } 90930e7468fSPeter Dunlap 91030e7468fSPeter Dunlap if (ic->ic_conn_flags & IDM_CONN_USE_SCOREBOARD) { 91130e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred = 91230e7468fSPeter Dunlap icmdp->cmd_itp->idt_rx_bytes; 913fcf3ce44SJohn Forte } else { 91430e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred = bp->b_bcount; 91530e7468fSPeter Dunlap if (idrhp->flags & ISCSI_FLAG_CMD_UNDERFLOW) { 91630e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred -= 91730e7468fSPeter Dunlap ntohl(idrhp->residual_count); 91830e7468fSPeter Dunlap } 919fcf3ce44SJohn Forte } 920fcf3ce44SJohn Forte 92130e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: rx_process_data_rsp: icp: %p pdu: %p " 92230e7468fSPeter Dunlap "itt: %d ibp: %p icmdp: %p xfer_len: %lu transferred: %lu dlen: %u", 92330e7468fSPeter Dunlap (void *)icp, (void *)pdu, idrhp->itt, (void *)bp, (void *)icmdp, 92430e7468fSPeter Dunlap (ibp == NULL) ? 0 : ibp->idb_xfer_len, 92530e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred, 92630e7468fSPeter Dunlap n2h24(idrhp->dlength)); 92730e7468fSPeter Dunlap 92830e7468fSPeter Dunlap iscsi_task_cleanup(idrhp->opcode, icmdp); 92930e7468fSPeter Dunlap 93030e7468fSPeter Dunlap iscsi_data_rsp_pkt(icmdp, idrhp); 93130e7468fSPeter Dunlap 93230e7468fSPeter Dunlap mutex_enter(&icp->conn_queue_active.mutex); 93330e7468fSPeter Dunlap iscsi_enqueue_active_cmd(icp, icmdp); 93430e7468fSPeter Dunlap iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E3, isp); 935fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 936fcf3ce44SJohn Forte 93730e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 938fcf3ce44SJohn Forte } 939fcf3ce44SJohn Forte 940fcf3ce44SJohn Forte /* 941fcf3ce44SJohn Forte * iscsi_rx_process_nop - Process a received nop. If nop is in response 942fcf3ce44SJohn Forte * to a ping we sent update stats. If initiated by the target we need 943fcf3ce44SJohn Forte * to response back to the target with a nop. Schedule the response. 944fcf3ce44SJohn Forte */ 945fcf3ce44SJohn Forte /* ARGSUSED */ 94630e7468fSPeter Dunlap static idm_status_t 94730e7468fSPeter Dunlap iscsi_rx_process_nop(idm_conn_t *ic, idm_pdu_t *pdu) 948fcf3ce44SJohn Forte { 949fcf3ce44SJohn Forte iscsi_sess_t *isp = NULL; 95030e7468fSPeter Dunlap iscsi_nop_in_hdr_t *inihp = (iscsi_nop_in_hdr_t *)pdu->isp_hdr; 951fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 95230e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 953fcf3ce44SJohn Forte 954fcf3ce44SJohn Forte if (icp->conn_expstatsn != ntohl(inihp->statsn)) { 95530e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi connection(%u/%x) protocol error - " 956fcf3ce44SJohn Forte "received status out of order itt:0x%x statsn:0x%x " 95730e7468fSPeter Dunlap "expstatsn:0x%x", icp->conn_oid, inihp->opcode, inihp->itt, 958fcf3ce44SJohn Forte ntohl(inihp->statsn), icp->conn_expstatsn); 95930e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 960fcf3ce44SJohn Forte } 96130e7468fSPeter Dunlap isp = icp->conn_sess; 96230e7468fSPeter Dunlap ASSERT(isp != NULL); 963fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 964fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 965fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 966fcf3ce44SJohn Forte if (inihp->itt != ISCSI_RSVD_TASK_TAG) { 967fcf3ce44SJohn Forte if (!ISCSI_SUCCESS(iscsi_rx_process_itt_to_icmdp( 96830e7468fSPeter Dunlap isp, (iscsi_hdr_t *)inihp, &icmdp))) { 96930e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi connection(%u) protocol error " 97030e7468fSPeter Dunlap "- can not find cmd for itt:0x%x", 97130e7468fSPeter Dunlap icp->conn_oid, inihp->itt); 972fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 973fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 974fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 97530e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 976fcf3ce44SJohn Forte } 977fcf3ce44SJohn Forte } 978fcf3ce44SJohn Forte 979fcf3ce44SJohn Forte /* update expcmdsn and maxcmdsn */ 980fcf3ce44SJohn Forte iscsi_update_flow_control(isp, ntohl(inihp->maxcmdsn), 981fcf3ce44SJohn Forte ntohl(inihp->expcmdsn)); 982fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 983fcf3ce44SJohn Forte 984fcf3ce44SJohn Forte if ((inihp->itt != ISCSI_RSVD_TASK_TAG) && 985fcf3ce44SJohn Forte (inihp->ttt == ISCSI_RSVD_TASK_TAG)) { 986fcf3ce44SJohn Forte /* This is the only type of nop that incs. the expstatsn */ 987fcf3ce44SJohn Forte icp->conn_expstatsn++; 988fcf3ce44SJohn Forte 989fcf3ce44SJohn Forte /* 990fcf3ce44SJohn Forte * This is a targets response to our nop 991fcf3ce44SJohn Forte */ 992fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E3, isp); 993fcf3ce44SJohn Forte } else if (inihp->ttt != ISCSI_RSVD_TASK_TAG) { 994fcf3ce44SJohn Forte /* 995fcf3ce44SJohn Forte * Target requested a nop. Send one. 996fcf3ce44SJohn Forte */ 997fcf3ce44SJohn Forte iscsi_handle_nop(icp, ISCSI_RSVD_TASK_TAG, inihp->ttt); 998fcf3ce44SJohn Forte } else { 999fcf3ce44SJohn Forte /* 1000fcf3ce44SJohn Forte * This is a target-initiated ping that doesn't expect 1001fcf3ce44SJohn Forte * a response; nothing to do except update our flow control 1002fcf3ce44SJohn Forte * (which we do in all cases above). 1003fcf3ce44SJohn Forte */ 1004fcf3ce44SJohn Forte /* EMPTY */ 1005fcf3ce44SJohn Forte } 1006fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 1007fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 1008fcf3ce44SJohn Forte 100930e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 1010fcf3ce44SJohn Forte } 1011fcf3ce44SJohn Forte 1012fcf3ce44SJohn Forte 1013fcf3ce44SJohn Forte /* 1014fcf3ce44SJohn Forte * iscsi_rx_process_reject_rsp - The server rejected a PDU 1015fcf3ce44SJohn Forte */ 101630e7468fSPeter Dunlap static idm_status_t 101730e7468fSPeter Dunlap iscsi_rx_process_reject_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 1018fcf3ce44SJohn Forte { 101930e7468fSPeter Dunlap iscsi_reject_rsp_hdr_t *irrhp = (iscsi_reject_rsp_hdr_t *)pdu->isp_hdr; 102030e7468fSPeter Dunlap iscsi_sess_t *isp = NULL; 102130e7468fSPeter Dunlap uint32_t dlength = 0; 102230e7468fSPeter Dunlap iscsi_hdr_t *old_ihp = NULL; 102330e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 102430e7468fSPeter Dunlap uint8_t *data = pdu->isp_data; 102530e7468fSPeter Dunlap iscsi_hdr_t *ihp = (iscsi_hdr_t *)irrhp; 102630e7468fSPeter Dunlap idm_status_t status; 102730e7468fSPeter Dunlap iscsi_cmd_t *icmdp = NULL; 1028fcf3ce44SJohn Forte 1029fcf3ce44SJohn Forte ASSERT(data != NULL); 103030e7468fSPeter Dunlap isp = icp->conn_sess; 103130e7468fSPeter Dunlap ASSERT(isp != NULL); 1032fcf3ce44SJohn Forte 103330e7468fSPeter Dunlap mutex_enter(&icp->conn_queue_active.mutex); 103430e7468fSPeter Dunlap if ((status = iscsi_rx_chk(icp, isp, (iscsi_scsi_rsp_hdr_t *)irrhp, 103530e7468fSPeter Dunlap &icmdp)) != IDM_STATUS_SUCCESS) { 103630e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 103730e7468fSPeter Dunlap return (status); 1038fcf3ce44SJohn Forte } 1039fcf3ce44SJohn Forte 1040fcf3ce44SJohn Forte /* If we don't have the rejected header we can't do anything */ 1041fcf3ce44SJohn Forte dlength = n2h24(irrhp->dlength); 1042fcf3ce44SJohn Forte if (dlength < sizeof (iscsi_hdr_t)) { 104330e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1044fcf3ce44SJohn Forte } 1045fcf3ce44SJohn Forte 1046fcf3ce44SJohn Forte /* map old ihp */ 1047fcf3ce44SJohn Forte old_ihp = (iscsi_hdr_t *)data; 1048fcf3ce44SJohn Forte 1049fcf3ce44SJohn Forte switch (irrhp->reason) { 1050fcf3ce44SJohn Forte /* 1051fcf3ce44SJohn Forte * ISCSI_REJECT_IMM_CMD_REJECT - Immediate Command Reject 1052fcf3ce44SJohn Forte * too many immediate commands (original cmd can be resent) 1053fcf3ce44SJohn Forte */ 1054fcf3ce44SJohn Forte case ISCSI_REJECT_IMM_CMD_REJECT: 1055fcf3ce44SJohn Forte /* 1056fcf3ce44SJohn Forte * We have exceeded the server's capacity for outstanding 1057fcf3ce44SJohn Forte * immediate commands. This must be a task management 1058fcf3ce44SJohn Forte * command so try to find it in the abortingqueue and 1059fcf3ce44SJohn Forte * complete it. 1060fcf3ce44SJohn Forte */ 1061fcf3ce44SJohn Forte if (!(old_ihp->opcode & ISCSI_OP_IMMEDIATE)) { 1062fcf3ce44SJohn Forte /* Rejecting IMM but old old_hdr wasn't IMM */ 106330e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1064fcf3ce44SJohn Forte } 1065fcf3ce44SJohn Forte 1066fcf3ce44SJohn Forte /* 1067fcf3ce44SJohn Forte * We only send NOP and TASK_MGT as IMM. All other 1068fcf3ce44SJohn Forte * cases should be considered as a protocol error. 1069fcf3ce44SJohn Forte */ 1070fcf3ce44SJohn Forte switch (old_ihp->opcode & ISCSI_OPCODE_MASK) { 1071fcf3ce44SJohn Forte case ISCSI_OP_NOOP_OUT: 1072fcf3ce44SJohn Forte /* 1073fcf3ce44SJohn Forte * A ping was rejected - treat this like 1074fcf3ce44SJohn Forte * ping response. The down side is we 1075fcf3ce44SJohn Forte * didn't get an updated MaxCmdSn. 1076fcf3ce44SJohn Forte */ 1077fcf3ce44SJohn Forte break; 1078fcf3ce44SJohn Forte case ISCSI_OP_SCSI_TASK_MGT_MSG: 107930e7468fSPeter Dunlap (void) iscsi_rx_process_rejected_tsk_mgt(ic, old_ihp); 1080fcf3ce44SJohn Forte break; 1081fcf3ce44SJohn Forte default: 1082fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) protocol error " 1083fcf3ce44SJohn Forte "- received a reject for a command(0x%02x) not " 1084fcf3ce44SJohn Forte "sent as an immediate", icp->conn_oid, 1085fcf3ce44SJohn Forte old_ihp->opcode); 108630e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 108730e7468fSPeter Dunlap break; 1088fcf3ce44SJohn Forte } 1089fcf3ce44SJohn Forte break; 1090fcf3ce44SJohn Forte 1091fcf3ce44SJohn Forte /* 1092fcf3ce44SJohn Forte * For the rest of the reject cases just use the general 1093fcf3ce44SJohn Forte * hammer of dis/reconnecting. This will resolve all 1094fcf3ce44SJohn Forte * noted issues although could be more graceful. 1095fcf3ce44SJohn Forte */ 1096fcf3ce44SJohn Forte case ISCSI_REJECT_DATA_DIGEST_ERROR: 1097fcf3ce44SJohn Forte case ISCSI_REJECT_CMD_BEFORE_LOGIN: 1098fcf3ce44SJohn Forte case ISCSI_REJECT_SNACK_REJECT: 1099fcf3ce44SJohn Forte case ISCSI_REJECT_PROTOCOL_ERROR: 1100fcf3ce44SJohn Forte case ISCSI_REJECT_CMD_NOT_SUPPORTED: 1101fcf3ce44SJohn Forte case ISCSI_REJECT_TASK_IN_PROGRESS: 1102fcf3ce44SJohn Forte case ISCSI_REJECT_INVALID_DATA_ACK: 1103fcf3ce44SJohn Forte case ISCSI_REJECT_INVALID_PDU_FIELD: 1104fcf3ce44SJohn Forte case ISCSI_REJECT_LONG_OPERATION_REJECT: 1105fcf3ce44SJohn Forte case ISCSI_REJECT_NEGOTIATION_RESET: 1106fcf3ce44SJohn Forte default: 1107fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) closing connection - " 1108fcf3ce44SJohn Forte "target requested itt:0x%x reason:0x%x", 1109fcf3ce44SJohn Forte icp->conn_oid, ihp->itt, irrhp->reason); 111030e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 111130e7468fSPeter Dunlap break; 1112fcf3ce44SJohn Forte } 1113fcf3ce44SJohn Forte 111430e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 1115fcf3ce44SJohn Forte } 1116fcf3ce44SJohn Forte 1117fcf3ce44SJohn Forte 1118fcf3ce44SJohn Forte /* 1119fcf3ce44SJohn Forte * iscsi_rx_process_rejected_tsk_mgt - 1120fcf3ce44SJohn Forte */ 112130e7468fSPeter Dunlap /* ARGSUSED */ 112230e7468fSPeter Dunlap static idm_status_t 112330e7468fSPeter Dunlap iscsi_rx_process_rejected_tsk_mgt(idm_conn_t *ic, iscsi_hdr_t *old_ihp) 1124fcf3ce44SJohn Forte { 112530e7468fSPeter Dunlap iscsi_sess_t *isp = NULL; 112630e7468fSPeter Dunlap iscsi_cmd_t *icmdp = NULL; 112730e7468fSPeter Dunlap iscsi_conn_t *icp = NULL; 1128fcf3ce44SJohn Forte 1129fcf3ce44SJohn Forte isp = icp->conn_sess; 1130fcf3ce44SJohn Forte ASSERT(old_ihp != NULL); 113130e7468fSPeter Dunlap ASSERT(isp != NULL); 1132fcf3ce44SJohn Forte 1133fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 1134fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 1135fcf3ce44SJohn Forte if (!ISCSI_SUCCESS(iscsi_rx_process_itt_to_icmdp( 1136fcf3ce44SJohn Forte isp, old_ihp, &icmdp))) { 1137fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 1138fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 113930e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1140fcf3ce44SJohn Forte } 1141fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 1142fcf3ce44SJohn Forte 1143fcf3ce44SJohn Forte switch (icmdp->cmd_type) { 1144fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_ABORT: 1145fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_RESET: 1146fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E4, 1147fcf3ce44SJohn Forte icp->conn_sess); 1148fcf3ce44SJohn Forte break; 1149fcf3ce44SJohn Forte /* We don't send any other task mgr types */ 1150fcf3ce44SJohn Forte default: 1151fcf3ce44SJohn Forte ASSERT(B_FALSE); 1152fcf3ce44SJohn Forte break; 1153fcf3ce44SJohn Forte } 1154fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 1155fcf3ce44SJohn Forte 115630e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 1157fcf3ce44SJohn Forte } 1158fcf3ce44SJohn Forte 1159fcf3ce44SJohn Forte 1160fcf3ce44SJohn Forte /* 1161fcf3ce44SJohn Forte * iscsi_rx_process_task_mgt_rsp - 1162fcf3ce44SJohn Forte */ 1163fcf3ce44SJohn Forte /* ARGSUSED */ 116430e7468fSPeter Dunlap static idm_status_t 116530e7468fSPeter Dunlap iscsi_rx_process_task_mgt_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 1166fcf3ce44SJohn Forte { 1167fcf3ce44SJohn Forte iscsi_sess_t *isp = NULL; 1168fcf3ce44SJohn Forte iscsi_scsi_task_mgt_rsp_hdr_t *istmrhp = NULL; 1169fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 117030e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 117130e7468fSPeter Dunlap idm_status_t status = IDM_STATUS_SUCCESS; 1172fcf3ce44SJohn Forte 1173fcf3ce44SJohn Forte isp = icp->conn_sess; 117430e7468fSPeter Dunlap istmrhp = (iscsi_scsi_task_mgt_rsp_hdr_t *)pdu->isp_hdr; 1175fcf3ce44SJohn Forte 1176fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 117730e7468fSPeter Dunlap if ((status = iscsi_rx_chk(icp, isp, (iscsi_scsi_rsp_hdr_t *)istmrhp, 117830e7468fSPeter Dunlap &icmdp)) != IDM_STATUS_SUCCESS) { 1179fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 118030e7468fSPeter Dunlap return (status); 1181fcf3ce44SJohn Forte } 1182fcf3ce44SJohn Forte 1183fcf3ce44SJohn Forte switch (icmdp->cmd_type) { 1184fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_ABORT: 1185fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_RESET: 1186fcf3ce44SJohn Forte switch (istmrhp->response) { 1187fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_COMPLETE: 1188fcf3ce44SJohn Forte /* success */ 1189fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, 1190fcf3ce44SJohn Forte ISCSI_CMD_EVENT_E3, isp); 1191fcf3ce44SJohn Forte break; 1192fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_NO_TASK: 1193fcf3ce44SJohn Forte /* 1194fcf3ce44SJohn Forte * If the array no longer knows about 1195fcf3ce44SJohn Forte * an ABORT RTT and we no longer have 1196fcf3ce44SJohn Forte * a parent SCSI command it was just 1197fcf3ce44SJohn Forte * completed, free this ABORT resource. 1198fcf3ce44SJohn Forte * Otherwise FALLTHRU this will flag a 1199fcf3ce44SJohn Forte * protocol problem. 1200fcf3ce44SJohn Forte */ 1201fcf3ce44SJohn Forte if ((icmdp->cmd_type == ISCSI_CMD_TYPE_ABORT) && 1202fcf3ce44SJohn Forte (icmdp->cmd_un.abort.icmdp == NULL)) { 1203fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, 1204fcf3ce44SJohn Forte ISCSI_CMD_EVENT_E4, isp); 1205fcf3ce44SJohn Forte break; 1206fcf3ce44SJohn Forte } 1207fcf3ce44SJohn Forte /* FALLTHRU */ 1208fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_NO_LUN: 1209fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_TASK_ALLEGIANT: 1210fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_NO_FAILOVER: 1211fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_IN_PRGRESS: 1212fcf3ce44SJohn Forte case SCSI_TCP_TM_RESP_REJECTED: 1213fcf3ce44SJohn Forte default: 1214fcf3ce44SJohn Forte /* 1215fcf3ce44SJohn Forte * Something is out of sync. Flush 1216fcf3ce44SJohn Forte * active queues and resync the 1217fcf3ce44SJohn Forte * the connection to try and recover 1218fcf3ce44SJohn Forte * to a known state. 1219fcf3ce44SJohn Forte */ 122030e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 1221fcf3ce44SJohn Forte } 1222fcf3ce44SJohn Forte break; 1223fcf3ce44SJohn Forte 1224fcf3ce44SJohn Forte default: 1225fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) protocol error - " 1226fcf3ce44SJohn Forte "received a task mgt response for a non-task mgt " 1227fcf3ce44SJohn Forte "cmd itt:0x%x type:%d", icp->conn_oid, istmrhp->itt, 1228fcf3ce44SJohn Forte icmdp->cmd_type); 122930e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 123030e7468fSPeter Dunlap break; 1231fcf3ce44SJohn Forte } 1232fcf3ce44SJohn Forte 1233fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 123430e7468fSPeter Dunlap return (status); 1235fcf3ce44SJohn Forte } 1236fcf3ce44SJohn Forte 1237fcf3ce44SJohn Forte 1238fcf3ce44SJohn Forte /* 123930e7468fSPeter Dunlap * iscsi_rx_process_logout_rsp - 1240fcf3ce44SJohn Forte * 1241fcf3ce44SJohn Forte */ 1242fcf3ce44SJohn Forte /* ARGSUSED */ 124330e7468fSPeter Dunlap idm_status_t 124430e7468fSPeter Dunlap iscsi_rx_process_logout_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 1245fcf3ce44SJohn Forte { 124630e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 124730e7468fSPeter Dunlap iscsi_logout_rsp_hdr_t *ilrhp = 124830e7468fSPeter Dunlap (iscsi_logout_rsp_hdr_t *)pdu->isp_hdr; 1249fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 125030e7468fSPeter Dunlap iscsi_sess_t *isp; 125130e7468fSPeter Dunlap idm_status_t status = IDM_STATUS_SUCCESS; 1252fcf3ce44SJohn Forte 1253fcf3ce44SJohn Forte isp = icp->conn_sess; 1254fcf3ce44SJohn Forte 1255fcf3ce44SJohn Forte if (icp->conn_expstatsn != ntohl(ilrhp->statsn)) { 125630e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi connection(%u/%x) protocol error - " 1257fcf3ce44SJohn Forte "received status out of order itt:0x%x statsn:0x%x " 125830e7468fSPeter Dunlap "expstatsn:0x%x", icp->conn_oid, ilrhp->opcode, ilrhp->itt, 1259fcf3ce44SJohn Forte ntohl(ilrhp->statsn), icp->conn_expstatsn); 126030e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1261fcf3ce44SJohn Forte } 1262fcf3ce44SJohn Forte 1263fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 1264fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 1265fcf3ce44SJohn Forte if (ilrhp->itt != ISCSI_RSVD_TASK_TAG) { 1266fcf3ce44SJohn Forte if (!ISCSI_SUCCESS(iscsi_rx_process_itt_to_icmdp( 126730e7468fSPeter Dunlap isp, (iscsi_hdr_t *)ilrhp, &icmdp))) { 1268fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 1269fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 127030e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1271fcf3ce44SJohn Forte } 1272fcf3ce44SJohn Forte } 1273fcf3ce44SJohn Forte 1274fcf3ce44SJohn Forte /* update expcmdsn and maxcmdsn */ 1275fcf3ce44SJohn Forte iscsi_update_flow_control(isp, ntohl(ilrhp->maxcmdsn), 1276fcf3ce44SJohn Forte ntohl(ilrhp->expcmdsn)); 1277fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 1278fcf3ce44SJohn Forte 127930e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, 128030e7468fSPeter Dunlap "DEBUG: iscsi_rx_process_logout_rsp: response: %d", 128130e7468fSPeter Dunlap ilrhp->response); 1282fcf3ce44SJohn Forte switch (ilrhp->response) { 1283fcf3ce44SJohn Forte case ISCSI_LOGOUT_CID_NOT_FOUND: 1284fcf3ce44SJohn Forte /* 1285fcf3ce44SJohn Forte * If the target doesn't know about our connection 1286fcf3ce44SJohn Forte * then we can consider our self disconnected. 1287fcf3ce44SJohn Forte */ 1288fcf3ce44SJohn Forte /* FALLTHRU */ 1289fcf3ce44SJohn Forte case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: 1290fcf3ce44SJohn Forte /* 1291fcf3ce44SJohn Forte * We don't support ErrorRecovery levels above 0 1292fcf3ce44SJohn Forte * currently so consider this success. 1293fcf3ce44SJohn Forte */ 1294fcf3ce44SJohn Forte /* FALLTHRU */ 1295fcf3ce44SJohn Forte case ISCSI_LOGOUT_CLEANUP_FAILED: 1296fcf3ce44SJohn Forte /* 1297fcf3ce44SJohn Forte * per spec. "cleanup failed for various reasons." 1298fcf3ce44SJohn Forte * Although those various reasons are undefined. 1299fcf3ce44SJohn Forte * Not sure what to do here. So fake success, 1300fcf3ce44SJohn Forte * which will disconnect the connection. 1301fcf3ce44SJohn Forte */ 1302fcf3ce44SJohn Forte /* FALLTHRU */ 1303fcf3ce44SJohn Forte case ISCSI_LOGOUT_SUCCESS: 1304fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E3, isp); 1305fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 130630e7468fSPeter Dunlap iscsi_drop_conn_cleanup(icp); 1307fcf3ce44SJohn Forte break; 1308fcf3ce44SJohn Forte default: 1309fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 131030e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 131130e7468fSPeter Dunlap break; 1312fcf3ce44SJohn Forte 131330e7468fSPeter Dunlap } 131430e7468fSPeter Dunlap return (status); 1315fcf3ce44SJohn Forte } 1316fcf3ce44SJohn Forte 1317fcf3ce44SJohn Forte /* 131830e7468fSPeter Dunlap * iscsi_rx_process_async_rsp 1319fcf3ce44SJohn Forte * 1320fcf3ce44SJohn Forte */ 1321fcf3ce44SJohn Forte /* ARGSUSED */ 132230e7468fSPeter Dunlap static idm_status_t 132330e7468fSPeter Dunlap iscsi_rx_process_async_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 1324fcf3ce44SJohn Forte { 132530e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 132630e7468fSPeter Dunlap iscsi_sess_t *isp = icp->conn_sess; 132730e7468fSPeter Dunlap idm_status_t rval = IDM_STATUS_SUCCESS; 132830e7468fSPeter Dunlap iscsi_task_t *itp; 132930e7468fSPeter Dunlap iscsi_async_evt_hdr_t *iaehp = 133030e7468fSPeter Dunlap (iscsi_async_evt_hdr_t *)pdu->isp_hdr; 1331fcf3ce44SJohn Forte 1332fcf3ce44SJohn Forte ASSERT(icp != NULL); 133330e7468fSPeter Dunlap ASSERT(pdu != NULL); 133430e7468fSPeter Dunlap ASSERT(isp != NULL); 1335fcf3ce44SJohn Forte 133630e7468fSPeter Dunlap mutex_enter(&isp->sess_cmdsn_mutex); 133730e7468fSPeter Dunlap if (icp->conn_expstatsn == ntohl(iaehp->statsn)) { 133830e7468fSPeter Dunlap icp->conn_expstatsn++; 133930e7468fSPeter Dunlap } else { 1340fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) protocol error - " 134130e7468fSPeter Dunlap "received status out of order statsn:0x%x " 134230e7468fSPeter Dunlap "expstatsn:0x%x", icp->conn_oid, 1343fcf3ce44SJohn Forte ntohl(iaehp->statsn), icp->conn_expstatsn); 134430e7468fSPeter Dunlap mutex_exit(&isp->sess_cmdsn_mutex); 134530e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1346fcf3ce44SJohn Forte } 134730e7468fSPeter Dunlap mutex_exit(&isp->sess_cmdsn_mutex); 1348fcf3ce44SJohn Forte 1349fcf3ce44SJohn Forte switch (iaehp->async_event) { 1350fcf3ce44SJohn Forte case ISCSI_ASYNC_EVENT_SCSI_EVENT: 1351fcf3ce44SJohn Forte /* 1352fcf3ce44SJohn Forte * SCSI asynchronous event is reported in 1353fcf3ce44SJohn Forte * the sense data. Sense data that accompanies 1354fcf3ce44SJohn Forte * the report in the data segment identifies the 1355fcf3ce44SJohn Forte * condition. If the target supports SCSI 1356fcf3ce44SJohn Forte * asynchronous events reporting (see [SAM2]) 1357fcf3ce44SJohn Forte * as indicated in the stardard INQUIRY data 1358fcf3ce44SJohn Forte * (see [SPC3]), its use may be enabled by 1359fcf3ce44SJohn Forte * parameters in the SCSI control mode page 1360fcf3ce44SJohn Forte * (see [SPC3]). 1361fcf3ce44SJohn Forte * 1362fcf3ce44SJohn Forte * T-10 has removed SCSI asunchronous events 1363fcf3ce44SJohn Forte * from the standard. Although we have seen 1364fcf3ce44SJohn Forte * a couple targets still spending these requests. 1365fcf3ce44SJohn Forte * Those targets were specifically sending them 1366fcf3ce44SJohn Forte * for notification of a LUN/Volume change 1367fcf3ce44SJohn Forte * (ex. LUN addition/removal). Take a general 1368fcf3ce44SJohn Forte * action to these events of dis/reconnecting. 1369fcf3ce44SJohn Forte * Once reconnected we perform a reenumeration. 1370fcf3ce44SJohn Forte */ 137130e7468fSPeter Dunlap idm_ini_conn_disconnect(ic); 1372fcf3ce44SJohn Forte break; 1373fcf3ce44SJohn Forte 1374fcf3ce44SJohn Forte case ISCSI_ASYNC_EVENT_REQUEST_LOGOUT: 137530e7468fSPeter Dunlap /* 137630e7468fSPeter Dunlap * We've been asked to logout by the target -- 137730e7468fSPeter Dunlap * we need to treat this differently from a normal logout 137830e7468fSPeter Dunlap * due to a discovery failure. Normal logouts result in 137930e7468fSPeter Dunlap * an N3 event to the session state machine and an offline 138030e7468fSPeter Dunlap * of the lun. In this case we want to put the connection 138130e7468fSPeter Dunlap * into "failed" state and generate N5 to the session state 138230e7468fSPeter Dunlap * machine since the initiator logged out at the target's 138330e7468fSPeter Dunlap * request. To track this we set a flag indicating we 138430e7468fSPeter Dunlap * received this async logout request from the tharget 138530e7468fSPeter Dunlap */ 1386fcf3ce44SJohn Forte mutex_enter(&icp->conn_state_mutex); 138730e7468fSPeter Dunlap icp->conn_async_logout = B_TRUE; 1388fcf3ce44SJohn Forte mutex_exit(&icp->conn_state_mutex); 138930e7468fSPeter Dunlap 139030e7468fSPeter Dunlap /* Target has requested this connection to logout. */ 139130e7468fSPeter Dunlap itp = kmem_zalloc(sizeof (iscsi_task_t), KM_SLEEP); 139230e7468fSPeter Dunlap itp->t_arg = icp; 139330e7468fSPeter Dunlap itp->t_blocking = B_FALSE; 139430e7468fSPeter Dunlap if (ddi_taskq_dispatch(isp->sess_taskq, 139530e7468fSPeter Dunlap (void(*)())iscsi_logout_start, itp, DDI_SLEEP) != 139630e7468fSPeter Dunlap DDI_SUCCESS) { 139730e7468fSPeter Dunlap /* Disconnect if we couldn't dispatch the task */ 139830e7468fSPeter Dunlap idm_ini_conn_disconnect(ic); 139930e7468fSPeter Dunlap } 1400fcf3ce44SJohn Forte break; 1401fcf3ce44SJohn Forte 1402fcf3ce44SJohn Forte case ISCSI_ASYNC_EVENT_DROPPING_CONNECTION: 1403fcf3ce44SJohn Forte /* 1404fcf3ce44SJohn Forte * Target is going to drop our connection. 1405fcf3ce44SJohn Forte * param1 - CID which will be dropped. 1406fcf3ce44SJohn Forte * param2 - Min time to reconnect. 1407fcf3ce44SJohn Forte * param3 - Max time to reconnect. 1408fcf3ce44SJohn Forte * 1409fcf3ce44SJohn Forte * For now just let fail as another disconnect. 1410fcf3ce44SJohn Forte * 1411fcf3ce44SJohn Forte * MC/S Once we support > 1 connections then 1412fcf3ce44SJohn Forte * we need to check the CID and drop that 1413fcf3ce44SJohn Forte * specific connection. 1414fcf3ce44SJohn Forte */ 141530e7468fSPeter Dunlap iscsi_conn_set_login_min_max(icp, iaehp->param2, 141630e7468fSPeter Dunlap iaehp->param3); 141730e7468fSPeter Dunlap idm_ini_conn_disconnect(ic); 1418fcf3ce44SJohn Forte break; 1419fcf3ce44SJohn Forte 1420fcf3ce44SJohn Forte case ISCSI_ASYNC_EVENT_DROPPING_ALL_CONNECTIONS: 1421fcf3ce44SJohn Forte /* 1422fcf3ce44SJohn Forte * Target is going to drop ALL connections. 1423fcf3ce44SJohn Forte * param2 - Min time to reconnect. 1424fcf3ce44SJohn Forte * param3 - Max time to reconnect. 1425fcf3ce44SJohn Forte * 1426fcf3ce44SJohn Forte * For now just let fail as anyother disconnect. 1427fcf3ce44SJohn Forte * 1428fcf3ce44SJohn Forte * MC/S Once we support more than > 1 connections 1429fcf3ce44SJohn Forte * then we need to drop all connections on the 1430fcf3ce44SJohn Forte * session. 1431fcf3ce44SJohn Forte */ 143230e7468fSPeter Dunlap iscsi_conn_set_login_min_max(icp, iaehp->param2, 143330e7468fSPeter Dunlap iaehp->param3); 143430e7468fSPeter Dunlap idm_ini_conn_disconnect(ic); 1435fcf3ce44SJohn Forte break; 1436fcf3ce44SJohn Forte 1437fcf3ce44SJohn Forte case ISCSI_ASYNC_EVENT_PARAM_NEGOTIATION: 1438fcf3ce44SJohn Forte /* 1439fcf3ce44SJohn Forte * Target requests parameter negotiation 1440fcf3ce44SJohn Forte * on this connection. 1441fcf3ce44SJohn Forte * 1442fcf3ce44SJohn Forte * The initiator must honor this request. For 1443fcf3ce44SJohn Forte * now we will request a logout. We can't 1444fcf3ce44SJohn Forte * just ignore this or it might force corruption? 1445fcf3ce44SJohn Forte */ 144630e7468fSPeter Dunlap itp = kmem_zalloc(sizeof (iscsi_task_t), KM_SLEEP); 144730e7468fSPeter Dunlap itp->t_arg = icp; 144830e7468fSPeter Dunlap itp->t_blocking = B_FALSE; 144930e7468fSPeter Dunlap if (ddi_taskq_dispatch(isp->sess_taskq, 145030e7468fSPeter Dunlap (void(*)())iscsi_logout_start, itp, DDI_SLEEP) != 145130e7468fSPeter Dunlap DDI_SUCCESS) { 145230e7468fSPeter Dunlap /* Disconnect if we couldn't dispatch the task */ 145330e7468fSPeter Dunlap idm_ini_conn_disconnect(ic); 145430e7468fSPeter Dunlap } 1455fcf3ce44SJohn Forte break; 1456fcf3ce44SJohn Forte 1457fcf3ce44SJohn Forte case ISCSI_ASYNC_EVENT_VENDOR_SPECIFIC: 1458fcf3ce44SJohn Forte /* 1459fcf3ce44SJohn Forte * We currently don't handle any vendor 1460fcf3ce44SJohn Forte * specific async events. So just ignore 1461fcf3ce44SJohn Forte * the request. 1462fcf3ce44SJohn Forte */ 146330e7468fSPeter Dunlap idm_ini_conn_disconnect(ic); 1464fcf3ce44SJohn Forte break; 1465fcf3ce44SJohn Forte default: 146630e7468fSPeter Dunlap rval = IDM_STATUS_PROTOCOL_ERROR; 1467fcf3ce44SJohn Forte } 1468fcf3ce44SJohn Forte 1469fcf3ce44SJohn Forte return (rval); 1470fcf3ce44SJohn Forte } 1471fcf3ce44SJohn Forte 1472fcf3ce44SJohn Forte /* 1473fcf3ce44SJohn Forte * iscsi_rx_process_text_rsp - processes iSCSI text response. It sets 1474fcf3ce44SJohn Forte * the cmd_result field of the command data structure with the actual 1475fcf3ce44SJohn Forte * status value instead of returning the status value. The return value 1476fcf3ce44SJohn Forte * is SUCCESS in order to let iscsi_handle_text control the operation of 1477fcf3ce44SJohn Forte * a text request. 147830e7468fSPeter Dunlap * Text requests are a handled a little different than other types of 1479fcf3ce44SJohn Forte * iSCSI commands because the initiator sends additional empty text requests 1480fcf3ce44SJohn Forte * in order to obtain the remaining responses required to complete the 1481fcf3ce44SJohn Forte * request. iscsi_handle_text controls the operation of text request, while 1482fcf3ce44SJohn Forte * iscsi_rx_process_text_rsp just process the current response. 1483fcf3ce44SJohn Forte */ 148430e7468fSPeter Dunlap static idm_status_t 148530e7468fSPeter Dunlap iscsi_rx_process_text_rsp(idm_conn_t *ic, idm_pdu_t *pdu) 1486fcf3ce44SJohn Forte { 1487fcf3ce44SJohn Forte iscsi_sess_t *isp = NULL; 148830e7468fSPeter Dunlap iscsi_text_rsp_hdr_t *ithp = 148930e7468fSPeter Dunlap (iscsi_text_rsp_hdr_t *)pdu->isp_hdr; 149030e7468fSPeter Dunlap iscsi_conn_t *icp = ic->ic_handle; 1491fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 1492fcf3ce44SJohn Forte boolean_t final = B_FALSE; 1493fcf3ce44SJohn Forte uint32_t data_len; 149430e7468fSPeter Dunlap uint8_t *data = pdu->isp_data; 149530e7468fSPeter Dunlap idm_status_t rval; 1496fcf3ce44SJohn Forte 1497fcf3ce44SJohn Forte isp = icp->conn_sess; 1498fcf3ce44SJohn Forte 1499fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 150030e7468fSPeter Dunlap if ((rval = iscsi_rx_chk(icp, isp, (iscsi_scsi_rsp_hdr_t *)ithp, 150130e7468fSPeter Dunlap &icmdp)) != IDM_STATUS_SUCCESS) { 1502fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 150330e7468fSPeter Dunlap return (rval); 1504fcf3ce44SJohn Forte } 1505fcf3ce44SJohn Forte 1506fcf3ce44SJohn Forte /* update local final response flag */ 1507fcf3ce44SJohn Forte if (ithp->flags & ISCSI_FLAG_FINAL) { 1508fcf3ce44SJohn Forte final = B_TRUE; 1509fcf3ce44SJohn Forte } 1510fcf3ce44SJohn Forte 1511fcf3ce44SJohn Forte /* 1512fcf3ce44SJohn Forte * validate received TTT value. RFC3720 specifies the following: 1513fcf3ce44SJohn Forte * - F bit set to 1 MUST have a reserved TTT value 0xffffffff 1514fcf3ce44SJohn Forte * - F bit set to 0 MUST have a non-reserved TTT value !0xffffffff 1515fcf3ce44SJohn Forte * In addition, the received TTT value must not change between 1516fcf3ce44SJohn Forte * responses of a long text response 1517fcf3ce44SJohn Forte */ 1518fcf3ce44SJohn Forte if (((final == B_TRUE) && (ithp->ttt != ISCSI_RSVD_TASK_TAG)) || 1519fcf3ce44SJohn Forte ((final == B_FALSE) && (ithp->ttt == ISCSI_RSVD_TASK_TAG))) { 1520fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_PROTOCOL_ERROR; 1521fcf3ce44SJohn Forte icmdp->cmd_un.text.stage = ISCSI_CMD_TEXT_FINAL_RSP; 1522fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 1523fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) protocol error - " 1524fcf3ce44SJohn Forte "received text response with invalid flags:0x%x or " 1525fcf3ce44SJohn Forte "ttt:0x%x", icp->conn_oid, ithp->flags, ithp->itt); 152630e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1527fcf3ce44SJohn Forte } 1528fcf3ce44SJohn Forte 1529fcf3ce44SJohn Forte if ((icmdp->cmd_un.text.stage == ISCSI_CMD_TEXT_INITIAL_REQ) && 1530fcf3ce44SJohn Forte (ithp->ttt == ISCSI_RSVD_TASK_TAG) && 1531fcf3ce44SJohn Forte (final == B_FALSE)) { 1532fcf3ce44SJohn Forte /* TTT should have matched reserved value */ 1533fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_PROTOCOL_ERROR; 1534fcf3ce44SJohn Forte icmdp->cmd_un.text.stage = ISCSI_CMD_TEXT_FINAL_RSP; 1535fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 1536fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi connection(%u) protocol " 1537fcf3ce44SJohn Forte "error - received text response with invalid " 1538fcf3ce44SJohn Forte "ttt:0x%x", icp->conn_oid, ithp->ttt); 153930e7468fSPeter Dunlap return (IDM_STATUS_PROTOCOL_ERROR); 1540fcf3ce44SJohn Forte } 1541fcf3ce44SJohn Forte 1542fcf3ce44SJohn Forte /* 1543fcf3ce44SJohn Forte * If this is first response, save away TTT value for later use 1544fcf3ce44SJohn Forte * in a long text request/response sequence 1545fcf3ce44SJohn Forte */ 1546fcf3ce44SJohn Forte if (icmdp->cmd_un.text.stage == ISCSI_CMD_TEXT_INITIAL_REQ) { 1547fcf3ce44SJohn Forte icmdp->cmd_un.text.ttt = ithp->ttt; 1548fcf3ce44SJohn Forte } 1549fcf3ce44SJohn Forte 1550fcf3ce44SJohn Forte data_len = ntoh24(ithp->dlength); 1551fcf3ce44SJohn Forte 1552fcf3ce44SJohn Forte /* check whether enough buffer available to copy data */ 1553fcf3ce44SJohn Forte if ((icmdp->cmd_un.text.total_rx_len + data_len) > 1554fcf3ce44SJohn Forte icmdp->cmd_un.text.buf_len) { 1555fcf3ce44SJohn Forte icmdp->cmd_un.text.total_rx_len += data_len; 1556fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_DATA_OVERFLOW; 1557fcf3ce44SJohn Forte /* 1558fcf3ce44SJohn Forte * DATA_OVERFLOW will result in a SUCCESS return so that 1559fcf3ce44SJohn Forte * iscsi_handle_text can continue to obtain the remaining 1560fcf3ce44SJohn Forte * text response if needed. 1561fcf3ce44SJohn Forte */ 1562fcf3ce44SJohn Forte } else { 1563fcf3ce44SJohn Forte char *buf_data = (icmdp->cmd_un.text.buf + 1564fcf3ce44SJohn Forte icmdp->cmd_un.text.offset); 1565fcf3ce44SJohn Forte 1566fcf3ce44SJohn Forte bcopy(data, buf_data, data_len); 1567fcf3ce44SJohn Forte icmdp->cmd_un.text.offset += data_len; 1568fcf3ce44SJohn Forte icmdp->cmd_un.text.total_rx_len += data_len; 1569fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_SUCCESS; 1570fcf3ce44SJohn Forte bcopy(ithp->rsvd4, icmdp->cmd_un.text.lun, 1571fcf3ce44SJohn Forte sizeof (icmdp->cmd_un.text.lun)); 1572fcf3ce44SJohn Forte } 1573fcf3ce44SJohn Forte 1574fcf3ce44SJohn Forte /* update stage */ 1575fcf3ce44SJohn Forte if (final == B_TRUE) { 1576fcf3ce44SJohn Forte icmdp->cmd_un.text.stage = ISCSI_CMD_TEXT_FINAL_RSP; 1577fcf3ce44SJohn Forte } else { 1578fcf3ce44SJohn Forte icmdp->cmd_un.text.stage = ISCSI_CMD_TEXT_CONTINUATION; 1579fcf3ce44SJohn Forte } 1580fcf3ce44SJohn Forte 1581fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E3, isp); 1582fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 158330e7468fSPeter Dunlap return (IDM_STATUS_SUCCESS); 158430e7468fSPeter Dunlap } 158530e7468fSPeter Dunlap 158630e7468fSPeter Dunlap /* 158730e7468fSPeter Dunlap * iscsi_rx_process_scsi_itt_to_icmdp - Lookup itt using IDM to find matching 158830e7468fSPeter Dunlap * icmdp. Verify itt in hdr and icmdp are the same. 158930e7468fSPeter Dunlap */ 159030e7468fSPeter Dunlap static iscsi_status_t 159130e7468fSPeter Dunlap iscsi_rx_process_scsi_itt_to_icmdp(iscsi_sess_t *isp, idm_conn_t *ic, 159230e7468fSPeter Dunlap iscsi_scsi_rsp_hdr_t *ihp, iscsi_cmd_t **icmdp) 159330e7468fSPeter Dunlap { 159430e7468fSPeter Dunlap idm_task_t *itp; 159530e7468fSPeter Dunlap 159630e7468fSPeter Dunlap ASSERT(isp != NULL); 159730e7468fSPeter Dunlap ASSERT(ihp != NULL); 159830e7468fSPeter Dunlap ASSERT(icmdp != NULL); 159930e7468fSPeter Dunlap ASSERT(mutex_owned(&isp->sess_cmdsn_mutex)); 160030e7468fSPeter Dunlap itp = idm_task_find_and_complete(ic, ihp->itt, ISCSI_INI_TASK_TTT); 160130e7468fSPeter Dunlap if (itp == NULL) { 160230e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi session(%u) protocol error - " 160330e7468fSPeter Dunlap "received unknown itt:0x%x - protocol error", 160430e7468fSPeter Dunlap isp->sess_oid, ihp->itt); 160530e7468fSPeter Dunlap return (ISCSI_STATUS_INTERNAL_ERROR); 160630e7468fSPeter Dunlap } 160730e7468fSPeter Dunlap *icmdp = itp->idt_private; 160830e7468fSPeter Dunlap 160930e7468fSPeter Dunlap idm_task_rele(itp); 161030e7468fSPeter Dunlap 1611fcf3ce44SJohn Forte return (ISCSI_STATUS_SUCCESS); 161230e7468fSPeter Dunlap 1613fcf3ce44SJohn Forte } 1614fcf3ce44SJohn Forte 1615fcf3ce44SJohn Forte /* 1616fcf3ce44SJohn Forte * iscsi_rx_process_itt_to_icmdp - Lookup itt in the session's 1617fcf3ce44SJohn Forte * cmd table to find matching icmdp. Verify itt in hdr and 1618fcf3ce44SJohn Forte * icmdp are the same. 1619fcf3ce44SJohn Forte */ 1620fcf3ce44SJohn Forte static iscsi_status_t 1621fcf3ce44SJohn Forte iscsi_rx_process_itt_to_icmdp(iscsi_sess_t *isp, iscsi_hdr_t *ihp, 1622fcf3ce44SJohn Forte iscsi_cmd_t **icmdp) 1623fcf3ce44SJohn Forte { 1624fcf3ce44SJohn Forte int cmd_table_idx = 0; 1625fcf3ce44SJohn Forte 1626fcf3ce44SJohn Forte ASSERT(isp != NULL); 1627fcf3ce44SJohn Forte ASSERT(ihp != NULL); 1628fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 1629fcf3ce44SJohn Forte ASSERT(mutex_owned(&isp->sess_cmdsn_mutex)); 1630fcf3ce44SJohn Forte 1631fcf3ce44SJohn Forte /* try to find an associated iscsi_pkt */ 163230e7468fSPeter Dunlap cmd_table_idx = (ihp->itt - IDM_TASKIDS_MAX) % ISCSI_CMD_TABLE_SIZE; 1633fcf3ce44SJohn Forte if (isp->sess_cmd_table[cmd_table_idx] == NULL) { 1634fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi session(%u) protocol error - " 1635fcf3ce44SJohn Forte "received unknown itt:0x%x - protocol error", 1636fcf3ce44SJohn Forte isp->sess_oid, ihp->itt); 1637fcf3ce44SJohn Forte return (ISCSI_STATUS_INTERNAL_ERROR); 1638fcf3ce44SJohn Forte } 1639fcf3ce44SJohn Forte 1640fcf3ce44SJohn Forte /* verify itt */ 1641fcf3ce44SJohn Forte if (isp->sess_cmd_table[cmd_table_idx]->cmd_itt != ihp->itt) { 1642fcf3ce44SJohn Forte cmn_err(CE_WARN, "iscsi session(%u) received itt:0x%x " 1643fcf3ce44SJohn Forte " which is out of sync with itt:0x%x", isp->sess_oid, 1644fcf3ce44SJohn Forte ihp->itt, isp->sess_cmd_table[cmd_table_idx]->cmd_itt); 1645fcf3ce44SJohn Forte return (ISCSI_STATUS_INTERNAL_ERROR); 1646fcf3ce44SJohn Forte } 1647fcf3ce44SJohn Forte 164829e23f3fSandrew.rutz@sun.com /* ensure that icmdp is still in Active state */ 164929e23f3fSandrew.rutz@sun.com if (isp->sess_cmd_table[cmd_table_idx]->cmd_state != 165029e23f3fSandrew.rutz@sun.com ISCSI_CMD_STATE_ACTIVE) { 165129e23f3fSandrew.rutz@sun.com cmn_err(CE_WARN, "iscsi session(%u) received itt:0x%x " 165229e23f3fSandrew.rutz@sun.com "but icmdp (%p) is not in active state", 165329e23f3fSandrew.rutz@sun.com isp->sess_oid, ihp->itt, 165429e23f3fSandrew.rutz@sun.com (void *)isp->sess_cmd_table[cmd_table_idx]); 165529e23f3fSandrew.rutz@sun.com return (ISCSI_STATUS_INTERNAL_ERROR); 165629e23f3fSandrew.rutz@sun.com } 165729e23f3fSandrew.rutz@sun.com 1658fcf3ce44SJohn Forte /* make sure this is a SCSI cmd */ 1659fcf3ce44SJohn Forte *icmdp = isp->sess_cmd_table[cmd_table_idx]; 1660fcf3ce44SJohn Forte 1661fcf3ce44SJohn Forte return (ISCSI_STATUS_SUCCESS); 1662fcf3ce44SJohn Forte } 1663fcf3ce44SJohn Forte 1664fcf3ce44SJohn Forte /* 1665fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 1666fcf3ce44SJohn Forte * | End of protocol receive routines | 1667fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 1668fcf3ce44SJohn Forte */ 1669fcf3ce44SJohn Forte 1670fcf3ce44SJohn Forte /* 1671fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 1672fcf3ce44SJohn Forte * | Beginning of protocol send routines | 1673fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 1674fcf3ce44SJohn Forte */ 1675fcf3ce44SJohn Forte 1676fcf3ce44SJohn Forte 1677fcf3ce44SJohn Forte /* 1678fcf3ce44SJohn Forte * iscsi_tx_thread - This thread is the driving point for all 167930e7468fSPeter Dunlap * iSCSI PDUs after login. No PDUs should call idm_pdu_tx() 1680fcf3ce44SJohn Forte * directly they should be funneled through iscsi_tx_thread. 1681fcf3ce44SJohn Forte */ 1682fcf3ce44SJohn Forte void 1683fcf3ce44SJohn Forte iscsi_tx_thread(iscsi_thread_t *thread, void *arg) 1684fcf3ce44SJohn Forte { 1685fcf3ce44SJohn Forte iscsi_conn_t *icp = (iscsi_conn_t *)arg; 1686fcf3ce44SJohn Forte iscsi_sess_t *isp = NULL; 1687fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 1688fcf3ce44SJohn Forte clock_t tout; 1689fcf3ce44SJohn Forte int ret = 1; 1690fcf3ce44SJohn Forte 1691fcf3ce44SJohn Forte ASSERT(icp != NULL); 1692fcf3ce44SJohn Forte isp = icp->conn_sess; 1693fcf3ce44SJohn Forte ASSERT(isp != NULL); 1694fcf3ce44SJohn Forte ASSERT(thread != NULL); 1695fcf3ce44SJohn Forte ASSERT(thread->signature == SIG_ISCSI_THREAD); 1696fcf3ce44SJohn Forte 1697fcf3ce44SJohn Forte tout = SEC_TO_TICK(1); 1698fcf3ce44SJohn Forte /* 1699fcf3ce44SJohn Forte * Transfer icmdps until shutdown by owning session. 1700fcf3ce44SJohn Forte */ 1701fcf3ce44SJohn Forte while (ret != 0) { 1702fcf3ce44SJohn Forte 1703fcf3ce44SJohn Forte isp->sess_window_open = B_TRUE; 1704fcf3ce44SJohn Forte /* 1705fcf3ce44SJohn Forte * While the window is open, there are commands available 1706fcf3ce44SJohn Forte * to send and the session state allows those commands to 1707fcf3ce44SJohn Forte * be sent try to transfer them. 1708fcf3ce44SJohn Forte */ 1709fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 1710fcf3ce44SJohn Forte while ((isp->sess_window_open == B_TRUE) && 1711fcf3ce44SJohn Forte ((icmdp = isp->sess_queue_pending.head) != NULL) && 1712fcf3ce44SJohn Forte (((icmdp->cmd_type != ISCSI_CMD_TYPE_SCSI) && 1713fcf3ce44SJohn Forte (ISCSI_CONN_STATE_FULL_FEATURE(icp->conn_state))) || 1714fcf3ce44SJohn Forte (icp->conn_state == ISCSI_CONN_STATE_LOGGED_IN))) { 1715fcf3ce44SJohn Forte 1716fcf3ce44SJohn Forte /* update command with this connection info */ 1717fcf3ce44SJohn Forte icmdp->cmd_conn = icp; 1718fcf3ce44SJohn Forte /* attempt to send this command */ 1719fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E2, isp); 1720fcf3ce44SJohn Forte 1721fcf3ce44SJohn Forte ASSERT(!mutex_owned(&isp->sess_queue_pending.mutex)); 1722fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 1723fcf3ce44SJohn Forte } 1724fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 1725fcf3ce44SJohn Forte 1726fcf3ce44SJohn Forte /* 1727fcf3ce44SJohn Forte * Go to sleep until there is something new 1728fcf3ce44SJohn Forte * to process (awoken via cv_boardcast). 1729fcf3ce44SJohn Forte * Or the timer goes off. 1730fcf3ce44SJohn Forte */ 1731fcf3ce44SJohn Forte ret = iscsi_thread_wait(thread, tout); 1732fcf3ce44SJohn Forte } 1733fcf3ce44SJohn Forte 1734fcf3ce44SJohn Forte } 1735fcf3ce44SJohn Forte 1736fcf3ce44SJohn Forte 1737fcf3ce44SJohn Forte /* 1738fcf3ce44SJohn Forte * iscsi_tx_cmd - transfers icmdp across wire as iscsi pdu 1739fcf3ce44SJohn Forte * 1740fcf3ce44SJohn Forte * Just prior to sending the command to the networking layer the 1741fcf3ce44SJohn Forte * pending queue lock will be dropped. At this point only local 1742fcf3ce44SJohn Forte * resources will be used, not the icmdp. Holding the queue lock 1743fcf3ce44SJohn Forte * across the networking call can lead to a hang. (This is due 1744fcf3ce44SJohn Forte * to the the target driver and networking layers competing use 1745fcf3ce44SJohn Forte * of the timeout() resources and the queue lock being held for 1746fcf3ce44SJohn Forte * both sides.) Upon the completion of this command the lock 1747fcf3ce44SJohn Forte * will have been re-acquired. 1748fcf3ce44SJohn Forte */ 1749fcf3ce44SJohn Forte iscsi_status_t 1750fcf3ce44SJohn Forte iscsi_tx_cmd(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 1751fcf3ce44SJohn Forte { 1752fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_INTERNAL_ERROR; 1753fcf3ce44SJohn Forte 1754fcf3ce44SJohn Forte ASSERT(isp != NULL); 1755fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 1756fcf3ce44SJohn Forte 1757fcf3ce44SJohn Forte /* transfer specific command type */ 1758fcf3ce44SJohn Forte switch (icmdp->cmd_type) { 1759fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_SCSI: 1760fcf3ce44SJohn Forte rval = iscsi_tx_scsi(isp, icmdp); 1761fcf3ce44SJohn Forte break; 1762fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_NOP: 1763fcf3ce44SJohn Forte rval = iscsi_tx_nop(isp, icmdp); 1764fcf3ce44SJohn Forte break; 1765fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_ABORT: 1766fcf3ce44SJohn Forte rval = iscsi_tx_abort(isp, icmdp); 1767fcf3ce44SJohn Forte break; 1768fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_RESET: 1769fcf3ce44SJohn Forte rval = iscsi_tx_reset(isp, icmdp); 1770fcf3ce44SJohn Forte break; 1771fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_LOGOUT: 1772fcf3ce44SJohn Forte rval = iscsi_tx_logout(isp, icmdp); 1773fcf3ce44SJohn Forte break; 1774fcf3ce44SJohn Forte case ISCSI_CMD_TYPE_TEXT: 1775fcf3ce44SJohn Forte rval = iscsi_tx_text(isp, icmdp); 1776fcf3ce44SJohn Forte break; 1777fcf3ce44SJohn Forte default: 177830e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi_tx_cmd: invalid cmdtype: %d", 177930e7468fSPeter Dunlap icmdp->cmd_type); 1780fcf3ce44SJohn Forte ASSERT(FALSE); 1781fcf3ce44SJohn Forte } 1782fcf3ce44SJohn Forte 1783fcf3ce44SJohn Forte ASSERT(!mutex_owned(&isp->sess_queue_pending.mutex)); 1784fcf3ce44SJohn Forte return (rval); 1785fcf3ce44SJohn Forte } 1786fcf3ce44SJohn Forte 1787fcf3ce44SJohn Forte /* 1788fcf3ce44SJohn Forte * a variable length cdb can be up to 16K, but we obviously don't want 1789fcf3ce44SJohn Forte * to put that on the stack; go with 200 bytes; if we get something 1790fcf3ce44SJohn Forte * bigger than that we will kmem_alloc a buffer 1791fcf3ce44SJohn Forte */ 1792fcf3ce44SJohn Forte #define DEF_CDB_LEN 200 1793fcf3ce44SJohn Forte 1794fcf3ce44SJohn Forte /* 1795fcf3ce44SJohn Forte * given the size of the cdb, return how many bytes the header takes, 1796fcf3ce44SJohn Forte * which is the sizeof addl_hdr_t + the CDB size, minus the 16 bytes 1797fcf3ce44SJohn Forte * stored in the basic header, minus sizeof (ahs_extscb) 1798fcf3ce44SJohn Forte */ 1799fcf3ce44SJohn Forte #define ADDLHDRSZ(x) (sizeof (iscsi_addl_hdr_t) + (x) - \ 1800fcf3ce44SJohn Forte 16 - 4) 1801fcf3ce44SJohn Forte 180230e7468fSPeter Dunlap static void 180330e7468fSPeter Dunlap iscsi_tx_init_hdr(iscsi_sess_t *isp, iscsi_conn_t *icp, 180430e7468fSPeter Dunlap iscsi_text_hdr_t *ihp, int opcode, uint32_t cmd_itt) 1805fcf3ce44SJohn Forte { 180630e7468fSPeter Dunlap ihp->opcode = opcode; 180730e7468fSPeter Dunlap ihp->itt = cmd_itt; 1808fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 1809fcf3ce44SJohn Forte ihp->cmdsn = htonl(isp->sess_cmdsn); 1810fcf3ce44SJohn Forte isp->sess_cmdsn++; 1811fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 1812fcf3ce44SJohn Forte ihp->expstatsn = htonl(icp->conn_expstatsn); 1813fcf3ce44SJohn Forte icp->conn_laststatsn = icp->conn_expstatsn; 181430e7468fSPeter Dunlap } 1815fcf3ce44SJohn Forte 1816fcf3ce44SJohn Forte 181730e7468fSPeter Dunlap static void 181830e7468fSPeter Dunlap iscsi_tx_scsi_data(iscsi_cmd_t *icmdp, iscsi_scsi_cmd_hdr_t *ihp, 181930e7468fSPeter Dunlap iscsi_conn_t *icp, idm_pdu_t *pdu) 182030e7468fSPeter Dunlap { 182130e7468fSPeter Dunlap struct buf *bp = NULL; 182230e7468fSPeter Dunlap size_t buflen = 0; 182330e7468fSPeter Dunlap uint32_t first_burst_length = 0; 182430e7468fSPeter Dunlap struct scsi_pkt *pkt; 182530e7468fSPeter Dunlap 182630e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 1827fcf3ce44SJohn Forte bp = icmdp->cmd_un.scsi.bp; 1828fcf3ce44SJohn Forte if ((bp != NULL) && bp->b_bcount) { 1829fcf3ce44SJohn Forte buflen = bp->b_bcount; 183030e7468fSPeter Dunlap first_burst_length = 183130e7468fSPeter Dunlap icp->conn_params.first_burst_length; 1832fcf3ce44SJohn Forte 1833fcf3ce44SJohn Forte if (bp->b_flags & B_READ) { 1834fcf3ce44SJohn Forte ihp->flags = ISCSI_FLAG_FINAL; 1835fcf3ce44SJohn Forte /* 1836fcf3ce44SJohn Forte * fix problem where OS sends bp (B_READ & 1837fcf3ce44SJohn Forte * b_bcount!=0) for a TUR or START_STOP. 1838fcf3ce44SJohn Forte * (comment came from cisco code.) 1839fcf3ce44SJohn Forte */ 1840fcf3ce44SJohn Forte if ((pkt->pkt_cdbp[0] != SCMD_TEST_UNIT_READY) && 1841fcf3ce44SJohn Forte (pkt->pkt_cdbp[0] != SCMD_START_STOP)) { 1842fcf3ce44SJohn Forte ihp->flags |= ISCSI_FLAG_CMD_READ; 1843fcf3ce44SJohn Forte ihp->data_length = htonl(buflen); 1844fcf3ce44SJohn Forte } 1845fcf3ce44SJohn Forte } else { 1846fcf3ce44SJohn Forte ihp->flags = ISCSI_FLAG_CMD_WRITE; 1847fcf3ce44SJohn Forte /* 1848fcf3ce44SJohn Forte * FinalBit on the the iSCSI PDU denotes this 1849fcf3ce44SJohn Forte * is the last PDU in the sequence. 1850fcf3ce44SJohn Forte * 1851fcf3ce44SJohn Forte * initial_r2t = true means R2T is required 1852fcf3ce44SJohn Forte * for additional PDU, so there will be no more 1853fcf3ce44SJohn Forte * unsolicited PDUs following 1854fcf3ce44SJohn Forte */ 1855fcf3ce44SJohn Forte if (icp->conn_params.initial_r2t) { 1856fcf3ce44SJohn Forte ihp->flags |= ISCSI_FLAG_FINAL; 1857fcf3ce44SJohn Forte } 1858fcf3ce44SJohn Forte 1859fcf3ce44SJohn Forte /* Check if we should send ImmediateData */ 1860fcf3ce44SJohn Forte if (icp->conn_params.immediate_data) { 186130e7468fSPeter Dunlap pdu->isp_data = 186230e7468fSPeter Dunlap (uint8_t *)icmdp-> 186330e7468fSPeter Dunlap cmd_un.scsi.bp->b_un.b_addr; 186430e7468fSPeter Dunlap 186530e7468fSPeter Dunlap pdu->isp_datalen = MIN(MIN(buflen, 1866fcf3ce44SJohn Forte first_burst_length), 1867fcf3ce44SJohn Forte icmdp->cmd_conn->conn_params. 1868fcf3ce44SJohn Forte max_xmit_data_seg_len); 1869fcf3ce44SJohn Forte 1870fcf3ce44SJohn Forte /* 1871fcf3ce44SJohn Forte * if everything fits immediate, or 1872fcf3ce44SJohn Forte * we can send all burst data immediate 1873fcf3ce44SJohn Forte * (not unsol), set F 1874fcf3ce44SJohn Forte */ 187530e7468fSPeter Dunlap /* 187630e7468fSPeter Dunlap * XXX This doesn't look right -- it's not 187730e7468fSPeter Dunlap * clear how we can handle transmitting 187830e7468fSPeter Dunlap * any unsolicited data. It looks like 187930e7468fSPeter Dunlap * we only support immediate data. So what 188030e7468fSPeter Dunlap * happens if we don't set ISCSI_FLAG_FINAL? 188130e7468fSPeter Dunlap * 188230e7468fSPeter Dunlap * Unless there's magic code somewhere that 188330e7468fSPeter Dunlap * is sending the remaining PDU's we should 188430e7468fSPeter Dunlap * simply set ISCSI_FLAG_FINAL and forget 188530e7468fSPeter Dunlap * about sending unsolicited data. The big 188630e7468fSPeter Dunlap * win is the immediate data anyway for small 188730e7468fSPeter Dunlap * PDU's. 188830e7468fSPeter Dunlap */ 188930e7468fSPeter Dunlap if ((pdu->isp_datalen == buflen) || 189030e7468fSPeter Dunlap (pdu->isp_datalen == first_burst_length)) { 1891fcf3ce44SJohn Forte ihp->flags |= ISCSI_FLAG_FINAL; 1892fcf3ce44SJohn Forte } 1893fcf3ce44SJohn Forte 189430e7468fSPeter Dunlap hton24(ihp->dlength, pdu->isp_datalen); 1895fcf3ce44SJohn Forte } 1896fcf3ce44SJohn Forte /* total data transfer length */ 1897fcf3ce44SJohn Forte ihp->data_length = htonl(buflen); 1898fcf3ce44SJohn Forte } 1899fcf3ce44SJohn Forte } else { 1900fcf3ce44SJohn Forte ihp->flags = ISCSI_FLAG_FINAL; 1901fcf3ce44SJohn Forte } 190230e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred += pdu->isp_datalen; 190330e7468fSPeter Dunlap /* XXX How is this different from the code above? */ 190430e7468fSPeter Dunlap /* will idm send the next data command up to burst length? */ 190530e7468fSPeter Dunlap /* send the burstlen if we haven't sent immediate data */ 190630e7468fSPeter Dunlap /* CRM: should idm send difference min(buflen, first_burst) and imm? */ 190730e7468fSPeter Dunlap /* (MIN(first_burst_length, buflen) - imdata > 0) */ 190830e7468fSPeter Dunlap /* CRM_LATER: change this to generate unsolicited pdu */ 190930e7468fSPeter Dunlap if ((buflen > 0) && 191030e7468fSPeter Dunlap ((bp->b_flags & B_READ) == 0) && 191130e7468fSPeter Dunlap (icp->conn_params.initial_r2t == 0) && 191230e7468fSPeter Dunlap pdu->isp_datalen == 0) { 191330e7468fSPeter Dunlap 191430e7468fSPeter Dunlap pdu->isp_datalen = MIN(first_burst_length, buflen); 191530e7468fSPeter Dunlap if ((pdu->isp_datalen == buflen) || 191630e7468fSPeter Dunlap (pdu->isp_datalen == first_burst_length)) { 191730e7468fSPeter Dunlap ihp->flags |= ISCSI_FLAG_FINAL; 191830e7468fSPeter Dunlap } 191930e7468fSPeter Dunlap pdu->isp_data = (uint8_t *)icmdp->cmd_un.scsi.bp->b_un.b_addr; 192030e7468fSPeter Dunlap hton24(ihp->dlength, pdu->isp_datalen); 192130e7468fSPeter Dunlap } 192230e7468fSPeter Dunlap } 192330e7468fSPeter Dunlap 192430e7468fSPeter Dunlap static void 192530e7468fSPeter Dunlap iscsi_tx_scsi_init_pkt(iscsi_cmd_t *icmdp, iscsi_scsi_cmd_hdr_t *ihp) 192630e7468fSPeter Dunlap { 192730e7468fSPeter Dunlap struct scsi_pkt *pkt; 192830e7468fSPeter Dunlap 192930e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 193030e7468fSPeter Dunlap pkt->pkt_state = (STATE_GOT_BUS | STATE_GOT_TARGET); 193130e7468fSPeter Dunlap pkt->pkt_reason = CMD_INCOMPLETE; 1932fcf3ce44SJohn Forte 1933fcf3ce44SJohn Forte /* tagged queuing */ 1934fcf3ce44SJohn Forte if (pkt->pkt_flags & FLAG_HTAG) { 1935fcf3ce44SJohn Forte ihp->flags |= ISCSI_ATTR_HEAD_OF_QUEUE; 1936fcf3ce44SJohn Forte } else if (pkt->pkt_flags & FLAG_OTAG) { 1937fcf3ce44SJohn Forte ihp->flags |= ISCSI_ATTR_ORDERED; 1938fcf3ce44SJohn Forte } else if (pkt->pkt_flags & FLAG_STAG) { 1939fcf3ce44SJohn Forte ihp->flags |= ISCSI_ATTR_SIMPLE; 1940fcf3ce44SJohn Forte } else { 1941fcf3ce44SJohn Forte /* ihp->flags |= ISCSI_ATTR_UNTAGGED; */ 1942fcf3ce44SJohn Forte /* EMPTY */ 1943fcf3ce44SJohn Forte } 1944fcf3ce44SJohn Forte 1945fcf3ce44SJohn Forte /* iscsi states lun is based on spc.2 */ 1946fcf3ce44SJohn Forte ISCSI_LUN_BYTE_COPY(ihp->lun, icmdp->cmd_un.scsi.lun); 1947fcf3ce44SJohn Forte 1948fcf3ce44SJohn Forte if (icmdp->cmd_un.scsi.cmdlen <= 16) { 1949fcf3ce44SJohn Forte /* copy the SCSI Command Block into the PDU */ 1950fcf3ce44SJohn Forte bcopy(pkt->pkt_cdbp, ihp->scb, 1951fcf3ce44SJohn Forte icmdp->cmd_un.scsi.cmdlen); 1952fcf3ce44SJohn Forte } else { 1953fcf3ce44SJohn Forte iscsi_addl_hdr_t *iahp; 1954fcf3ce44SJohn Forte 1955fcf3ce44SJohn Forte iahp = (iscsi_addl_hdr_t *)ihp; 1956fcf3ce44SJohn Forte 1957fcf3ce44SJohn Forte ihp->hlength = (ADDLHDRSZ(icmdp->cmd_un.scsi.cmdlen) - 1958fcf3ce44SJohn Forte sizeof (iscsi_scsi_cmd_hdr_t) + 3) / 4; 1959fcf3ce44SJohn Forte iahp->ahs_hlen_hi = 0; 1960fcf3ce44SJohn Forte iahp->ahs_hlen_lo = (icmdp->cmd_un.scsi.cmdlen - 15); 1961fcf3ce44SJohn Forte iahp->ahs_key = 0x01; 1962fcf3ce44SJohn Forte iahp->ahs_resv = 0; 1963fcf3ce44SJohn Forte bcopy(pkt->pkt_cdbp, ihp->scb, 16); 196430e7468fSPeter Dunlap bcopy(((char *)pkt->pkt_cdbp) + 16, &iahp->ahs_extscb[0], 196530e7468fSPeter Dunlap icmdp->cmd_un.scsi.cmdlen); 1966fcf3ce44SJohn Forte } 1967fcf3ce44SJohn Forte 196830e7468fSPeter Dunlap /* 196930e7468fSPeter Dunlap * Update all values before transfering. 197030e7468fSPeter Dunlap * We should never touch the icmdp after 197130e7468fSPeter Dunlap * transfering if there is no more data 197230e7468fSPeter Dunlap * to send. The only case the idm_pdu_tx() 197330e7468fSPeter Dunlap * will fail is a on a connection disconnect 197430e7468fSPeter Dunlap * in that case the command will be flushed. 197530e7468fSPeter Dunlap */ 197630e7468fSPeter Dunlap pkt->pkt_state |= STATE_SENT_CMD; 1977fcf3ce44SJohn Forte } 1978fcf3ce44SJohn Forte 197930e7468fSPeter Dunlap static void 198030e7468fSPeter Dunlap iscsi_tx_scsi_init_task(iscsi_cmd_t *icmdp, iscsi_conn_t *icp, 198130e7468fSPeter Dunlap iscsi_scsi_cmd_hdr_t *ihp) 1982fcf3ce44SJohn Forte { 198330e7468fSPeter Dunlap idm_task_t *itp; 198430e7468fSPeter Dunlap struct buf *bp = NULL; 198530e7468fSPeter Dunlap uint32_t data_length; 1986fcf3ce44SJohn Forte 198730e7468fSPeter Dunlap bp = icmdp->cmd_un.scsi.bp; 1988fcf3ce44SJohn Forte 198930e7468fSPeter Dunlap itp = icmdp->cmd_itp; 199030e7468fSPeter Dunlap ASSERT(itp != NULL); 199130e7468fSPeter Dunlap data_length = ntohl(ihp->data_length); 199230e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, 199330e7468fSPeter Dunlap "DEBUG: iscsi_tx_init_task: task_start: %p idt_tt: %x cmdsn: %x " 199430e7468fSPeter Dunlap "sess_cmdsn: %x cmd: %p " 199530e7468fSPeter Dunlap "cmdtype: %d datalen: %u", 199630e7468fSPeter Dunlap (void *)itp, itp->idt_tt, ihp->cmdsn, icp->conn_sess->sess_cmdsn, 199730e7468fSPeter Dunlap (void *)icmdp, icmdp->cmd_type, data_length); 199830e7468fSPeter Dunlap if (data_length > 0) { 199930e7468fSPeter Dunlap if (bp->b_flags & B_READ) { 200030e7468fSPeter Dunlap icmdp->cmd_un.scsi.ibp_ibuf = 200130e7468fSPeter Dunlap idm_buf_alloc(icp->conn_ic, 200230e7468fSPeter Dunlap bp->b_un.b_addr, bp->b_bcount); 200330e7468fSPeter Dunlap if (icmdp->cmd_un.scsi.ibp_ibuf) 200430e7468fSPeter Dunlap idm_buf_bind_in(itp, 200530e7468fSPeter Dunlap icmdp->cmd_un.scsi.ibp_ibuf); 200630e7468fSPeter Dunlap } else { 200730e7468fSPeter Dunlap icmdp->cmd_un.scsi.ibp_obuf = 200830e7468fSPeter Dunlap idm_buf_alloc(icp->conn_ic, 200930e7468fSPeter Dunlap bp->b_un.b_addr, bp->b_bcount); 201030e7468fSPeter Dunlap if (icmdp->cmd_un.scsi.ibp_obuf) 201130e7468fSPeter Dunlap idm_buf_bind_out(itp, 201230e7468fSPeter Dunlap icmdp->cmd_un.scsi.ibp_obuf); 201330e7468fSPeter Dunlap } 201430e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, 201530e7468fSPeter Dunlap "DEBUG: pdu_tx: task_start(%s): %p ic: %p idt_tt: %x " 201630e7468fSPeter Dunlap "cmdsn: %x sess_cmdsn: %x sess_expcmdsn: %x obuf: %p " 201730e7468fSPeter Dunlap "cmdp: %p cmdtype: %d " 201830e7468fSPeter Dunlap "buflen: %lu " "bpaddr: %p datalen: %u ", 201930e7468fSPeter Dunlap bp->b_flags & B_READ ? "B_READ" : "B_WRITE", 202030e7468fSPeter Dunlap (void *)itp, (void *)icp->conn_ic, 202130e7468fSPeter Dunlap itp->idt_tt, ihp->cmdsn, 202230e7468fSPeter Dunlap icp->conn_sess->sess_cmdsn, 202330e7468fSPeter Dunlap icp->conn_sess->sess_expcmdsn, 202430e7468fSPeter Dunlap (void *)icmdp->cmd_un.scsi.ibp_ibuf, 202530e7468fSPeter Dunlap (void *)icmdp, icmdp->cmd_type, bp->b_bcount, 202630e7468fSPeter Dunlap (void *)bp->b_un.b_addr, 202730e7468fSPeter Dunlap data_length); 202830e7468fSPeter Dunlap } 2029fcf3ce44SJohn Forte 2030fcf3ce44SJohn Forte /* 203130e7468fSPeter Dunlap * Task is now active 2032fcf3ce44SJohn Forte */ 203330e7468fSPeter Dunlap idm_task_start(itp, ISCSI_INI_TASK_TTT); 2034fcf3ce44SJohn Forte } 2035fcf3ce44SJohn Forte 2036fcf3ce44SJohn Forte /* 203730e7468fSPeter Dunlap * iscsi_tx_scsi - 203830e7468fSPeter Dunlap * 2039fcf3ce44SJohn Forte */ 2040fcf3ce44SJohn Forte static iscsi_status_t 204130e7468fSPeter Dunlap iscsi_tx_scsi(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 2042fcf3ce44SJohn Forte { 2043fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 204430e7468fSPeter Dunlap iscsi_conn_t *icp = NULL; 204530e7468fSPeter Dunlap struct scsi_pkt *pkt = NULL; 204630e7468fSPeter Dunlap iscsi_scsi_cmd_hdr_t *ihp = NULL; 204730e7468fSPeter Dunlap int cdblen = 0; 204830e7468fSPeter Dunlap idm_pdu_t *pdu; 204930e7468fSPeter Dunlap int len; 2050fcf3ce44SJohn Forte 2051fcf3ce44SJohn Forte ASSERT(isp != NULL); 2052fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2053fcf3ce44SJohn Forte 205430e7468fSPeter Dunlap pdu = kmem_zalloc(sizeof (idm_pdu_t), KM_SLEEP); 205530e7468fSPeter Dunlap 205630e7468fSPeter Dunlap pkt = icmdp->cmd_un.scsi.pkt; 205730e7468fSPeter Dunlap ASSERT(pkt != NULL); 205830e7468fSPeter Dunlap icp = icmdp->cmd_conn; 205930e7468fSPeter Dunlap ASSERT(icp != NULL); 206030e7468fSPeter Dunlap 206130e7468fSPeter Dunlap /* Reset counts in case we are on a retry */ 206230e7468fSPeter Dunlap icmdp->cmd_un.scsi.data_transferred = 0; 206330e7468fSPeter Dunlap 206430e7468fSPeter Dunlap if (icmdp->cmd_un.scsi.cmdlen > DEF_CDB_LEN) { 206530e7468fSPeter Dunlap cdblen = icmdp->cmd_un.scsi.cmdlen; 206630e7468fSPeter Dunlap ihp = kmem_zalloc(ADDLHDRSZ(cdblen), KM_SLEEP); 206730e7468fSPeter Dunlap len = ADDLHDRSZ(cdblen); 206830e7468fSPeter Dunlap } else { 206930e7468fSPeter Dunlap /* 207030e7468fSPeter Dunlap * only bzero the basic header; the additional header 207130e7468fSPeter Dunlap * will be set up correctly later, if needed 207230e7468fSPeter Dunlap */ 207330e7468fSPeter Dunlap ihp = kmem_zalloc(sizeof (iscsi_scsi_cmd_hdr_t), KM_SLEEP); 207430e7468fSPeter Dunlap len = sizeof (iscsi_scsi_cmd_hdr_t); 2075fcf3ce44SJohn Forte } 2076fcf3ce44SJohn Forte 207730e7468fSPeter Dunlap iscsi_tx_init_hdr(isp, icp, (iscsi_text_hdr_t *)ihp, 207830e7468fSPeter Dunlap ISCSI_OP_SCSI_CMD, icmdp->cmd_itt); 207930e7468fSPeter Dunlap 208030e7468fSPeter Dunlap idm_pdu_init(pdu, icp->conn_ic, (void *)icmdp, &iscsi_tx_done); 208130e7468fSPeter Dunlap idm_pdu_init_hdr(pdu, (uint8_t *)ihp, len); 208230e7468fSPeter Dunlap pdu->isp_data = NULL; 208330e7468fSPeter Dunlap pdu->isp_datalen = 0; 2084fcf3ce44SJohn Forte 2085fcf3ce44SJohn Forte /* 208630e7468fSPeter Dunlap * Sestion 12.11 of the iSCSI specification has a good table 208730e7468fSPeter Dunlap * describing when uncolicited data and/or immediate data 208830e7468fSPeter Dunlap * should be sent. 2089fcf3ce44SJohn Forte */ 2090fcf3ce44SJohn Forte 209130e7468fSPeter Dunlap iscsi_tx_scsi_data(icmdp, ihp, icp, pdu); 209230e7468fSPeter Dunlap 209330e7468fSPeter Dunlap iscsi_tx_scsi_init_pkt(icmdp, ihp); 209430e7468fSPeter Dunlap 209530e7468fSPeter Dunlap /* Calls idm_task_start */ 209630e7468fSPeter Dunlap iscsi_tx_scsi_init_task(icmdp, icp, ihp); 209730e7468fSPeter Dunlap 2098fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 2099fcf3ce44SJohn Forte 210030e7468fSPeter Dunlap idm_pdu_tx(pdu); 2101fcf3ce44SJohn Forte 210230e7468fSPeter Dunlap return (rval); 210330e7468fSPeter Dunlap } 2104fcf3ce44SJohn Forte 2105fcf3ce44SJohn Forte 210630e7468fSPeter Dunlap /* ARGSUSED */ 210730e7468fSPeter Dunlap static void 210830e7468fSPeter Dunlap iscsi_tx_done(idm_pdu_t *pdu, idm_status_t status) 210930e7468fSPeter Dunlap { 211030e7468fSPeter Dunlap kmem_free((iscsi_hdr_t *)pdu->isp_hdr, pdu->isp_hdrlen); 211130e7468fSPeter Dunlap kmem_free(pdu, sizeof (idm_pdu_t)); 211230e7468fSPeter Dunlap } 2113fcf3ce44SJohn Forte 2114fcf3ce44SJohn Forte 211530e7468fSPeter Dunlap static void 211630e7468fSPeter Dunlap iscsi_tx_pdu(iscsi_conn_t *icp, int opcode, void *hdr, int hdrlen, 211730e7468fSPeter Dunlap iscsi_cmd_t *icmdp) 211830e7468fSPeter Dunlap { 211930e7468fSPeter Dunlap idm_pdu_t *tx_pdu; 212030e7468fSPeter Dunlap iscsi_hdr_t *ihp = (iscsi_hdr_t *)hdr; 2121fcf3ce44SJohn Forte 212230e7468fSPeter Dunlap tx_pdu = kmem_zalloc(sizeof (idm_pdu_t), KM_SLEEP); 212330e7468fSPeter Dunlap ASSERT(tx_pdu != NULL); 2124fcf3ce44SJohn Forte 212530e7468fSPeter Dunlap idm_pdu_init(tx_pdu, icp->conn_ic, icmdp, &iscsi_tx_done); 212630e7468fSPeter Dunlap idm_pdu_init_hdr(tx_pdu, hdr, hdrlen); 212730e7468fSPeter Dunlap if (opcode == ISCSI_OP_TEXT_CMD) { 212830e7468fSPeter Dunlap idm_pdu_init_data(tx_pdu, 212930e7468fSPeter Dunlap (uint8_t *)icmdp->cmd_un.text.buf, 213030e7468fSPeter Dunlap ntoh24(ihp->dlength)); 2131fcf3ce44SJohn Forte } 2132fcf3ce44SJohn Forte 213330e7468fSPeter Dunlap mutex_exit(&icp->conn_sess->sess_queue_pending.mutex); 213430e7468fSPeter Dunlap idm_pdu_tx(tx_pdu); 2135fcf3ce44SJohn Forte } 2136fcf3ce44SJohn Forte 2137fcf3ce44SJohn Forte 2138fcf3ce44SJohn Forte /* 2139fcf3ce44SJohn Forte * iscsi_tx_nop - 2140fcf3ce44SJohn Forte * 2141fcf3ce44SJohn Forte */ 2142fcf3ce44SJohn Forte static iscsi_status_t 2143fcf3ce44SJohn Forte iscsi_tx_nop(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 2144fcf3ce44SJohn Forte { 2145fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2146fcf3ce44SJohn Forte iscsi_conn_t *icp = NULL; 214730e7468fSPeter Dunlap iscsi_nop_out_hdr_t *inohp; 2148fcf3ce44SJohn Forte 2149fcf3ce44SJohn Forte ASSERT(isp != NULL); 2150fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2151fcf3ce44SJohn Forte icp = icmdp->cmd_conn; 2152fcf3ce44SJohn Forte ASSERT(icp != NULL); 2153fcf3ce44SJohn Forte 215430e7468fSPeter Dunlap inohp = kmem_zalloc(sizeof (iscsi_nop_out_hdr_t), KM_SLEEP); 215530e7468fSPeter Dunlap ASSERT(inohp != NULL); 215630e7468fSPeter Dunlap 215730e7468fSPeter Dunlap inohp->opcode = ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE; 215830e7468fSPeter Dunlap inohp->flags = ISCSI_FLAG_FINAL; 215930e7468fSPeter Dunlap inohp->itt = icmdp->cmd_itt; 216030e7468fSPeter Dunlap inohp->ttt = icmdp->cmd_ttt; 2161fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 216230e7468fSPeter Dunlap inohp->cmdsn = htonl(isp->sess_cmdsn); 2163fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 216430e7468fSPeter Dunlap inohp->expstatsn = htonl(icp->conn_expstatsn); 2165fcf3ce44SJohn Forte icp->conn_laststatsn = icp->conn_expstatsn; 216630e7468fSPeter Dunlap iscsi_tx_pdu(icp, ISCSI_OP_NOOP_OUT, inohp, 216730e7468fSPeter Dunlap sizeof (iscsi_nop_out_hdr_t), icmdp); 2168fcf3ce44SJohn Forte return (rval); 2169fcf3ce44SJohn Forte } 2170fcf3ce44SJohn Forte 2171fcf3ce44SJohn Forte 2172fcf3ce44SJohn Forte /* 2173fcf3ce44SJohn Forte * iscsi_tx_abort - 2174fcf3ce44SJohn Forte * 2175fcf3ce44SJohn Forte */ 2176fcf3ce44SJohn Forte static iscsi_status_t 2177fcf3ce44SJohn Forte iscsi_tx_abort(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 2178fcf3ce44SJohn Forte { 2179fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2180fcf3ce44SJohn Forte iscsi_conn_t *icp = NULL; 218130e7468fSPeter Dunlap iscsi_scsi_task_mgt_hdr_t *istmh; 2182fcf3ce44SJohn Forte 2183fcf3ce44SJohn Forte ASSERT(isp != NULL); 2184fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2185fcf3ce44SJohn Forte icp = icmdp->cmd_conn; 2186fcf3ce44SJohn Forte ASSERT(icp != NULL); 2187fcf3ce44SJohn Forte 218830e7468fSPeter Dunlap istmh = kmem_zalloc(sizeof (iscsi_scsi_task_mgt_hdr_t), KM_SLEEP); 218930e7468fSPeter Dunlap ASSERT(istmh != NULL); 2190fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 219130e7468fSPeter Dunlap istmh->cmdsn = htonl(isp->sess_cmdsn); 2192fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 219330e7468fSPeter Dunlap istmh->expstatsn = htonl(icp->conn_expstatsn); 2194fcf3ce44SJohn Forte icp->conn_laststatsn = icp->conn_expstatsn; 219530e7468fSPeter Dunlap istmh->itt = icmdp->cmd_itt; 219630e7468fSPeter Dunlap istmh->opcode = ISCSI_OP_SCSI_TASK_MGT_MSG | ISCSI_OP_IMMEDIATE; 219730e7468fSPeter Dunlap istmh->function = ISCSI_FLAG_FINAL | ISCSI_TM_FUNC_ABORT_TASK; 219830e7468fSPeter Dunlap ISCSI_LUN_BYTE_COPY(istmh->lun, 2199fcf3ce44SJohn Forte icmdp->cmd_un.abort.icmdp->cmd_un.scsi.lun); 220030e7468fSPeter Dunlap istmh->rtt = icmdp->cmd_un.abort.icmdp->cmd_itt; 220130e7468fSPeter Dunlap iscsi_tx_pdu(icp, ISCSI_OP_SCSI_TASK_MGT_MSG, istmh, 220230e7468fSPeter Dunlap sizeof (iscsi_scsi_task_mgt_hdr_t), icmdp); 2203fcf3ce44SJohn Forte 2204fcf3ce44SJohn Forte return (rval); 2205fcf3ce44SJohn Forte } 2206fcf3ce44SJohn Forte 2207fcf3ce44SJohn Forte 2208fcf3ce44SJohn Forte /* 2209fcf3ce44SJohn Forte * iscsi_tx_reset - 2210fcf3ce44SJohn Forte * 2211fcf3ce44SJohn Forte */ 2212fcf3ce44SJohn Forte static iscsi_status_t 2213fcf3ce44SJohn Forte iscsi_tx_reset(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 2214fcf3ce44SJohn Forte { 2215fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2216fcf3ce44SJohn Forte iscsi_conn_t *icp = NULL; 221730e7468fSPeter Dunlap iscsi_scsi_task_mgt_hdr_t *istmh; 2218fcf3ce44SJohn Forte 2219fcf3ce44SJohn Forte ASSERT(isp != NULL); 2220fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2221fcf3ce44SJohn Forte icp = icmdp->cmd_conn; 2222fcf3ce44SJohn Forte ASSERT(icp != NULL); 2223fcf3ce44SJohn Forte 222430e7468fSPeter Dunlap istmh = kmem_zalloc(sizeof (iscsi_scsi_task_mgt_hdr_t), KM_SLEEP); 222530e7468fSPeter Dunlap ASSERT(istmh != NULL); 222630e7468fSPeter Dunlap istmh->opcode = ISCSI_OP_SCSI_TASK_MGT_MSG | ISCSI_OP_IMMEDIATE; 2227fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 222830e7468fSPeter Dunlap istmh->cmdsn = htonl(isp->sess_cmdsn); 2229fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 223030e7468fSPeter Dunlap istmh->expstatsn = htonl(icp->conn_expstatsn); 223130e7468fSPeter Dunlap istmh->itt = icmdp->cmd_itt; 2232fcf3ce44SJohn Forte 2233fcf3ce44SJohn Forte switch (icmdp->cmd_un.reset.level) { 2234fcf3ce44SJohn Forte case RESET_LUN: 223530e7468fSPeter Dunlap istmh->function = ISCSI_FLAG_FINAL | 2236fcf3ce44SJohn Forte ISCSI_TM_FUNC_LOGICAL_UNIT_RESET; 223730e7468fSPeter Dunlap ISCSI_LUN_BYTE_COPY(istmh->lun, icmdp->cmd_lun->lun_num); 2238fcf3ce44SJohn Forte break; 2239fcf3ce44SJohn Forte case RESET_TARGET: 2240fcf3ce44SJohn Forte case RESET_BUS: 224130e7468fSPeter Dunlap istmh->function = ISCSI_FLAG_FINAL | 2242fcf3ce44SJohn Forte ISCSI_TM_FUNC_TARGET_WARM_RESET; 2243fcf3ce44SJohn Forte break; 2244fcf3ce44SJohn Forte default: 2245fcf3ce44SJohn Forte /* unsupported / unknown level */ 2246fcf3ce44SJohn Forte ASSERT(FALSE); 2247fcf3ce44SJohn Forte break; 2248fcf3ce44SJohn Forte } 2249fcf3ce44SJohn Forte 225030e7468fSPeter Dunlap iscsi_tx_pdu(icp, ISCSI_OP_SCSI_TASK_MGT_MSG, istmh, 225130e7468fSPeter Dunlap sizeof (iscsi_scsi_task_mgt_hdr_t), icmdp); 2252fcf3ce44SJohn Forte 2253fcf3ce44SJohn Forte return (rval); 2254fcf3ce44SJohn Forte } 2255fcf3ce44SJohn Forte 2256fcf3ce44SJohn Forte 2257fcf3ce44SJohn Forte /* 2258fcf3ce44SJohn Forte * iscsi_tx_logout - 2259fcf3ce44SJohn Forte * 2260fcf3ce44SJohn Forte */ 2261fcf3ce44SJohn Forte static iscsi_status_t 2262fcf3ce44SJohn Forte iscsi_tx_logout(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 2263fcf3ce44SJohn Forte { 2264fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2265fcf3ce44SJohn Forte iscsi_conn_t *icp = NULL; 226630e7468fSPeter Dunlap iscsi_logout_hdr_t *ilh; 2267fcf3ce44SJohn Forte 2268fcf3ce44SJohn Forte ASSERT(isp != NULL); 2269fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2270fcf3ce44SJohn Forte icp = icmdp->cmd_conn; 2271fcf3ce44SJohn Forte ASSERT(icp != NULL); 2272fcf3ce44SJohn Forte 227330e7468fSPeter Dunlap ilh = kmem_zalloc(sizeof (iscsi_logout_hdr_t), KM_SLEEP); 227430e7468fSPeter Dunlap ilh->opcode = ISCSI_OP_LOGOUT_CMD | ISCSI_OP_IMMEDIATE; 227530e7468fSPeter Dunlap ilh->flags = ISCSI_FLAG_FINAL | ISCSI_LOGOUT_REASON_CLOSE_SESSION; 227630e7468fSPeter Dunlap ilh->itt = icmdp->cmd_itt; 227730e7468fSPeter Dunlap ilh->cid = icp->conn_cid; 2278fcf3ce44SJohn Forte mutex_enter(&isp->sess_cmdsn_mutex); 227930e7468fSPeter Dunlap ilh->cmdsn = htonl(isp->sess_cmdsn); 2280fcf3ce44SJohn Forte mutex_exit(&isp->sess_cmdsn_mutex); 228130e7468fSPeter Dunlap ilh->expstatsn = htonl(icp->conn_expstatsn); 228230e7468fSPeter Dunlap iscsi_tx_pdu(icp, ISCSI_OP_LOGOUT_CMD, ilh, 228330e7468fSPeter Dunlap sizeof (iscsi_logout_hdr_t), icmdp); 2284fcf3ce44SJohn Forte 2285fcf3ce44SJohn Forte return (rval); 2286fcf3ce44SJohn Forte } 2287fcf3ce44SJohn Forte 2288fcf3ce44SJohn Forte /* 2289fcf3ce44SJohn Forte * iscsi_tx_text - setup iSCSI text request header and send PDU with 2290fcf3ce44SJohn Forte * data given in the buffer attached to the command. For a single 2291fcf3ce44SJohn Forte * text request, the target may need to send its response in multiple 2292fcf3ce44SJohn Forte * text response. In this case, empty text requests are sent after 2293fcf3ce44SJohn Forte * each received response to notify the target the initiator is ready 2294fcf3ce44SJohn Forte * for more response. For the initial request, the data_len field in 2295fcf3ce44SJohn Forte * the text specific portion of a command is set to the amount of data 2296fcf3ce44SJohn Forte * the initiator wants to send as part of the request. If additional 2297fcf3ce44SJohn Forte * empty text requests are required for long responses, the data_len 2298fcf3ce44SJohn Forte * field is set to 0 by the iscsi_handle_text function. 2299fcf3ce44SJohn Forte */ 2300fcf3ce44SJohn Forte static iscsi_status_t 2301fcf3ce44SJohn Forte iscsi_tx_text(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 2302fcf3ce44SJohn Forte { 2303fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2304fcf3ce44SJohn Forte iscsi_conn_t *icp = NULL; 230530e7468fSPeter Dunlap iscsi_text_hdr_t *ith; 2306fcf3ce44SJohn Forte 2307fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2308fcf3ce44SJohn Forte icp = icmdp->cmd_conn; 2309fcf3ce44SJohn Forte ASSERT(icp != NULL); 2310fcf3ce44SJohn Forte 231130e7468fSPeter Dunlap ith = kmem_zalloc(sizeof (iscsi_text_hdr_t), KM_SLEEP); 231230e7468fSPeter Dunlap ASSERT(ith != NULL); 231330e7468fSPeter Dunlap ith->flags = ISCSI_FLAG_FINAL; 231430e7468fSPeter Dunlap hton24(ith->dlength, icmdp->cmd_un.text.data_len); 231530e7468fSPeter Dunlap ith->ttt = icmdp->cmd_un.text.ttt; 231630e7468fSPeter Dunlap iscsi_tx_init_hdr(isp, icp, (iscsi_text_hdr_t *)ith, 231730e7468fSPeter Dunlap ISCSI_OP_TEXT_CMD, icmdp->cmd_itt); 231830e7468fSPeter Dunlap bcopy(icmdp->cmd_un.text.lun, ith->rsvd4, sizeof (ith->rsvd4)); 2319fcf3ce44SJohn Forte 232030e7468fSPeter Dunlap iscsi_tx_pdu(icp, ISCSI_OP_TEXT_CMD, ith, sizeof (iscsi_text_hdr_t), 232130e7468fSPeter Dunlap icmdp); 2322fcf3ce44SJohn Forte 2323fcf3ce44SJohn Forte return (rval); 2324fcf3ce44SJohn Forte } 2325fcf3ce44SJohn Forte 2326fcf3ce44SJohn Forte /* 2327fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 2328fcf3ce44SJohn Forte * | End of protocol send routines | 2329fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 2330fcf3ce44SJohn Forte */ 2331fcf3ce44SJohn Forte 2332fcf3ce44SJohn Forte /* 2333fcf3ce44SJohn Forte * iscsi_handle_abort - 2334fcf3ce44SJohn Forte * 2335fcf3ce44SJohn Forte */ 2336fcf3ce44SJohn Forte void 2337fcf3ce44SJohn Forte iscsi_handle_abort(void *arg) 2338fcf3ce44SJohn Forte { 2339fcf3ce44SJohn Forte iscsi_sess_t *isp = NULL; 2340fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = (iscsi_cmd_t *)arg; 2341fcf3ce44SJohn Forte iscsi_cmd_t *new_icmdp; 2342fcf3ce44SJohn Forte iscsi_conn_t *icp; 2343fcf3ce44SJohn Forte 2344fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2345fcf3ce44SJohn Forte icp = icmdp->cmd_conn; 2346fcf3ce44SJohn Forte ASSERT(icp != NULL); 2347fcf3ce44SJohn Forte isp = icp->conn_sess; 2348fcf3ce44SJohn Forte ASSERT(isp != NULL); 2349fcf3ce44SJohn Forte 2350fcf3ce44SJohn Forte /* there should only be one abort */ 2351fcf3ce44SJohn Forte ASSERT(icmdp->cmd_un.scsi.abort_icmdp == NULL); 2352fcf3ce44SJohn Forte 2353fcf3ce44SJohn Forte new_icmdp = iscsi_cmd_alloc(icp, KM_SLEEP); 2354fcf3ce44SJohn Forte new_icmdp->cmd_type = ISCSI_CMD_TYPE_ABORT; 2355fcf3ce44SJohn Forte new_icmdp->cmd_lun = icmdp->cmd_lun; 2356fcf3ce44SJohn Forte new_icmdp->cmd_un.abort.icmdp = icmdp; 2357fcf3ce44SJohn Forte new_icmdp->cmd_conn = icmdp->cmd_conn; 2358fcf3ce44SJohn Forte icmdp->cmd_un.scsi.abort_icmdp = new_icmdp; 2359fcf3ce44SJohn Forte 2360fcf3ce44SJohn Forte /* pending queue mutex is already held by timeout_checks */ 2361fcf3ce44SJohn Forte iscsi_cmd_state_machine(new_icmdp, ISCSI_CMD_EVENT_E1, isp); 2362fcf3ce44SJohn Forte } 2363fcf3ce44SJohn Forte 236430e7468fSPeter Dunlap /* 236530e7468fSPeter Dunlap * Callback from IDM indicating that the task has been suspended or aborted. 236630e7468fSPeter Dunlap */ 236730e7468fSPeter Dunlap void 236830e7468fSPeter Dunlap iscsi_task_aborted(idm_task_t *idt, idm_status_t status) 236930e7468fSPeter Dunlap { 237030e7468fSPeter Dunlap iscsi_cmd_t *icmdp = idt->idt_private; 237130e7468fSPeter Dunlap iscsi_conn_t *icp = icmdp->cmd_conn; 237230e7468fSPeter Dunlap iscsi_sess_t *isp = icp->conn_sess; 237330e7468fSPeter Dunlap 237430e7468fSPeter Dunlap ASSERT(icmdp->cmd_conn != NULL); 237530e7468fSPeter Dunlap 237630e7468fSPeter Dunlap switch (status) { 237730e7468fSPeter Dunlap case IDM_STATUS_SUSPENDED: 237830e7468fSPeter Dunlap /* 237930e7468fSPeter Dunlap * If the task is suspended, it may be aborted later, 238030e7468fSPeter Dunlap * so we can ignore this notification. 238130e7468fSPeter Dunlap */ 238230e7468fSPeter Dunlap break; 238330e7468fSPeter Dunlap 238430e7468fSPeter Dunlap case IDM_STATUS_ABORTED: 238530e7468fSPeter Dunlap mutex_enter(&icp->conn_queue_active.mutex); 238630e7468fSPeter Dunlap iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E9, isp); 238730e7468fSPeter Dunlap mutex_exit(&icp->conn_queue_active.mutex); 238830e7468fSPeter Dunlap break; 238930e7468fSPeter Dunlap 239030e7468fSPeter Dunlap default: 239130e7468fSPeter Dunlap /* 239230e7468fSPeter Dunlap * Unexpected status. 239330e7468fSPeter Dunlap */ 239430e7468fSPeter Dunlap ASSERT(0); 239530e7468fSPeter Dunlap } 239630e7468fSPeter Dunlap 239730e7468fSPeter Dunlap } 2398fcf3ce44SJohn Forte 2399fcf3ce44SJohn Forte /* 2400fcf3ce44SJohn Forte * iscsi_handle_nop - 2401fcf3ce44SJohn Forte * 2402fcf3ce44SJohn Forte */ 2403fcf3ce44SJohn Forte static void 2404fcf3ce44SJohn Forte iscsi_handle_nop(iscsi_conn_t *icp, uint32_t itt, uint32_t ttt) 2405fcf3ce44SJohn Forte { 2406fcf3ce44SJohn Forte iscsi_sess_t *isp = NULL; 2407fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 2408fcf3ce44SJohn Forte 2409fcf3ce44SJohn Forte ASSERT(icp != NULL); 2410fcf3ce44SJohn Forte isp = icp->conn_sess; 2411fcf3ce44SJohn Forte ASSERT(isp != NULL); 2412fcf3ce44SJohn Forte 2413fcf3ce44SJohn Forte icmdp = iscsi_cmd_alloc(icp, KM_NOSLEEP); 2414fcf3ce44SJohn Forte if (icmdp == NULL) { 2415fcf3ce44SJohn Forte return; 2416fcf3ce44SJohn Forte } 2417fcf3ce44SJohn Forte 2418fcf3ce44SJohn Forte icmdp->cmd_type = ISCSI_CMD_TYPE_NOP; 2419fcf3ce44SJohn Forte icmdp->cmd_itt = itt; 2420fcf3ce44SJohn Forte icmdp->cmd_ttt = ttt; 2421fcf3ce44SJohn Forte icmdp->cmd_lun = NULL; 2422fcf3ce44SJohn Forte icp->conn_nop_lbolt = ddi_get_lbolt(); 2423fcf3ce44SJohn Forte 2424fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E1, isp); 2425fcf3ce44SJohn Forte } 2426fcf3ce44SJohn Forte 2427fcf3ce44SJohn Forte /* 2428fcf3ce44SJohn Forte * iscsi_handle_reset - 2429fcf3ce44SJohn Forte * 2430fcf3ce44SJohn Forte */ 2431fcf3ce44SJohn Forte iscsi_status_t 2432fcf3ce44SJohn Forte iscsi_handle_reset(iscsi_sess_t *isp, int level, iscsi_lun_t *ilp) 2433fcf3ce44SJohn Forte { 2434fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2435fcf3ce44SJohn Forte iscsi_conn_t *icp; 2436fcf3ce44SJohn Forte iscsi_cmd_t icmd; 2437fcf3ce44SJohn Forte 2438fcf3ce44SJohn Forte ASSERT(isp != NULL); 2439fcf3ce44SJohn Forte 2440fcf3ce44SJohn Forte bzero(&icmd, sizeof (iscsi_cmd_t)); 2441fcf3ce44SJohn Forte icmd.cmd_sig = ISCSI_SIG_CMD; 2442fcf3ce44SJohn Forte icmd.cmd_state = ISCSI_CMD_STATE_FREE; 2443fcf3ce44SJohn Forte icmd.cmd_type = ISCSI_CMD_TYPE_RESET; 2444fcf3ce44SJohn Forte icmd.cmd_lun = ilp; 2445fcf3ce44SJohn Forte icmd.cmd_un.reset.level = level; 2446fcf3ce44SJohn Forte icmd.cmd_result = ISCSI_STATUS_SUCCESS; 2447fcf3ce44SJohn Forte icmd.cmd_completed = B_FALSE; 2448fcf3ce44SJohn Forte mutex_init(&icmd.cmd_mutex, NULL, MUTEX_DRIVER, NULL); 2449fcf3ce44SJohn Forte cv_init(&icmd.cmd_completion, NULL, CV_DRIVER, NULL); 2450fcf3ce44SJohn Forte /* 2451fcf3ce44SJohn Forte * If we received an IO and we are not in the 2452fcf3ce44SJohn Forte * LOGGED_IN state we are in the process of 2453fcf3ce44SJohn Forte * failing. Just respond that we are BUSY. 2454fcf3ce44SJohn Forte */ 2455fcf3ce44SJohn Forte mutex_enter(&isp->sess_state_mutex); 2456fcf3ce44SJohn Forte if (!ISCSI_SESS_STATE_FULL_FEATURE(isp->sess_state)) { 2457fcf3ce44SJohn Forte /* We aren't connected to the target fake success */ 2458fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 2459fcf3ce44SJohn Forte return (ISCSI_STATUS_SUCCESS); 2460fcf3ce44SJohn Forte } 2461fcf3ce44SJohn Forte 2462fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 2463fcf3ce44SJohn Forte iscsi_cmd_state_machine(&icmd, ISCSI_CMD_EVENT_E1, isp); 2464fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 2465fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 2466fcf3ce44SJohn Forte 2467fcf3ce44SJohn Forte /* stall until completed */ 2468fcf3ce44SJohn Forte mutex_enter(&icmd.cmd_mutex); 2469fcf3ce44SJohn Forte while (icmd.cmd_completed == B_FALSE) { 2470fcf3ce44SJohn Forte cv_wait(&icmd.cmd_completion, &icmd.cmd_mutex); 2471fcf3ce44SJohn Forte } 2472fcf3ce44SJohn Forte mutex_exit(&icmd.cmd_mutex); 2473fcf3ce44SJohn Forte 2474fcf3ce44SJohn Forte /* copy rval */ 2475fcf3ce44SJohn Forte rval = icmd.cmd_result; 2476fcf3ce44SJohn Forte 2477fcf3ce44SJohn Forte if (rval == ISCSI_STATUS_SUCCESS) { 2478fcf3ce44SJohn Forte /* 2479fcf3ce44SJohn Forte * Reset was successful. We need to flush 2480fcf3ce44SJohn Forte * all active IOs. 2481fcf3ce44SJohn Forte */ 2482fcf3ce44SJohn Forte rw_enter(&isp->sess_conn_list_rwlock, RW_READER); 2483fcf3ce44SJohn Forte icp = isp->sess_conn_list; 2484fcf3ce44SJohn Forte while (icp != NULL) { 2485fcf3ce44SJohn Forte iscsi_cmd_t *t_icmdp = NULL; 2486fcf3ce44SJohn Forte 2487fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 2488fcf3ce44SJohn Forte t_icmdp = icp->conn_queue_active.head; 2489fcf3ce44SJohn Forte while (t_icmdp != NULL) { 2490fcf3ce44SJohn Forte iscsi_cmd_state_machine(t_icmdp, 2491fcf3ce44SJohn Forte ISCSI_CMD_EVENT_E7, isp); 2492fcf3ce44SJohn Forte t_icmdp = icp->conn_queue_active.head; 2493fcf3ce44SJohn Forte } 2494fcf3ce44SJohn Forte 2495fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 2496fcf3ce44SJohn Forte icp = icp->conn_next; 2497fcf3ce44SJohn Forte } 2498fcf3ce44SJohn Forte rw_exit(&isp->sess_conn_list_rwlock); 2499fcf3ce44SJohn Forte } 2500fcf3ce44SJohn Forte 2501fcf3ce44SJohn Forte /* clean up */ 2502fcf3ce44SJohn Forte cv_destroy(&icmd.cmd_completion); 2503fcf3ce44SJohn Forte mutex_destroy(&icmd.cmd_mutex); 2504fcf3ce44SJohn Forte 2505fcf3ce44SJohn Forte return (rval); 2506fcf3ce44SJohn Forte } 2507fcf3ce44SJohn Forte 250830e7468fSPeter Dunlap /* 250930e7468fSPeter Dunlap * iscsi_lgoout_start - task handler for deferred logout 251030e7468fSPeter Dunlap */ 251130e7468fSPeter Dunlap static void 251230e7468fSPeter Dunlap iscsi_logout_start(void *arg) 251330e7468fSPeter Dunlap { 251430e7468fSPeter Dunlap iscsi_task_t *itp = (iscsi_task_t *)arg; 251530e7468fSPeter Dunlap iscsi_conn_t *icp; 251630e7468fSPeter Dunlap 251730e7468fSPeter Dunlap icp = (iscsi_conn_t *)itp->t_arg; 251830e7468fSPeter Dunlap 251930e7468fSPeter Dunlap mutex_enter(&icp->conn_state_mutex); 252030e7468fSPeter Dunlap (void) iscsi_handle_logout(icp); 252130e7468fSPeter Dunlap mutex_exit(&icp->conn_state_mutex); 252230e7468fSPeter Dunlap } 2523fcf3ce44SJohn Forte 2524fcf3ce44SJohn Forte /* 2525fcf3ce44SJohn Forte * iscsi_handle_logout - This function will issue a logout for 2526fcf3ce44SJohn Forte * the session from a specific connection. 2527fcf3ce44SJohn Forte */ 2528fcf3ce44SJohn Forte iscsi_status_t 2529fcf3ce44SJohn Forte iscsi_handle_logout(iscsi_conn_t *icp) 2530fcf3ce44SJohn Forte { 2531fcf3ce44SJohn Forte iscsi_sess_t *isp; 253230e7468fSPeter Dunlap idm_conn_t *ic; 2533fcf3ce44SJohn Forte iscsi_cmd_t *icmdp; 2534fcf3ce44SJohn Forte int rval; 2535fcf3ce44SJohn Forte 2536fcf3ce44SJohn Forte ASSERT(icp != NULL); 2537fcf3ce44SJohn Forte isp = icp->conn_sess; 253830e7468fSPeter Dunlap ic = icp->conn_ic; 2539fcf3ce44SJohn Forte ASSERT(isp != NULL); 2540fcf3ce44SJohn Forte ASSERT(isp->sess_hba != NULL); 254130e7468fSPeter Dunlap ASSERT(mutex_owned(&icp->conn_state_mutex)); 254230e7468fSPeter Dunlap 254330e7468fSPeter Dunlap /* 254430e7468fSPeter Dunlap * We may want to explicitly disconnect if something goes wrong so 254530e7468fSPeter Dunlap * grab a hold to ensure that the IDM connection context can't 254630e7468fSPeter Dunlap * disappear. 254730e7468fSPeter Dunlap */ 254830e7468fSPeter Dunlap idm_conn_hold(ic); 2549fcf3ce44SJohn Forte 2550fcf3ce44SJohn Forte icmdp = iscsi_cmd_alloc(icp, KM_SLEEP); 2551fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2552fcf3ce44SJohn Forte icmdp->cmd_type = ISCSI_CMD_TYPE_LOGOUT; 2553fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_SUCCESS; 2554fcf3ce44SJohn Forte icmdp->cmd_completed = B_FALSE; 2555fcf3ce44SJohn Forte 2556fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 2557fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E1, isp); 2558fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 2559fcf3ce44SJohn Forte 2560fcf3ce44SJohn Forte /* 2561fcf3ce44SJohn Forte * release connection state mutex to avoid a deadlock. This 2562fcf3ce44SJohn Forte * function is called from within the connection state 2563fcf3ce44SJohn Forte * machine with the lock held. When the logout response is 2564fcf3ce44SJohn Forte * received another call to the connection state machine 2565fcf3ce44SJohn Forte * occurs which causes the deadlock 2566fcf3ce44SJohn Forte */ 2567fcf3ce44SJohn Forte mutex_exit(&icp->conn_state_mutex); 2568fcf3ce44SJohn Forte 2569fcf3ce44SJohn Forte /* stall until completed */ 2570fcf3ce44SJohn Forte mutex_enter(&icmdp->cmd_mutex); 2571fcf3ce44SJohn Forte while (icmdp->cmd_completed == B_FALSE) { 2572fcf3ce44SJohn Forte cv_wait(&icmdp->cmd_completion, &icmdp->cmd_mutex); 2573fcf3ce44SJohn Forte } 2574fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 2575fcf3ce44SJohn Forte mutex_enter(&icp->conn_state_mutex); 2576fcf3ce44SJohn Forte 2577fcf3ce44SJohn Forte /* copy rval */ 2578fcf3ce44SJohn Forte rval = icmdp->cmd_result; 2579fcf3ce44SJohn Forte 2580fcf3ce44SJohn Forte /* clean up */ 2581fcf3ce44SJohn Forte iscsi_cmd_free(icmdp); 2582fcf3ce44SJohn Forte 258330e7468fSPeter Dunlap if (rval != 0) { 258430e7468fSPeter Dunlap /* If the logout failed then drop the connection */ 258530e7468fSPeter Dunlap idm_ini_conn_disconnect(icp->conn_ic); 258630e7468fSPeter Dunlap } 258730e7468fSPeter Dunlap 258830e7468fSPeter Dunlap /* stall until connection settles */ 258930e7468fSPeter Dunlap while ((icp->conn_state != ISCSI_CONN_STATE_FREE) && 259030e7468fSPeter Dunlap (icp->conn_state != ISCSI_CONN_STATE_FAILED) && 259130e7468fSPeter Dunlap (icp->conn_state != ISCSI_CONN_STATE_POLLING)) { 259230e7468fSPeter Dunlap /* wait for transition */ 259330e7468fSPeter Dunlap cv_wait(&icp->conn_state_change, &icp->conn_state_mutex); 259430e7468fSPeter Dunlap } 259530e7468fSPeter Dunlap 259630e7468fSPeter Dunlap idm_conn_rele(ic); 259730e7468fSPeter Dunlap 259830e7468fSPeter Dunlap /* 259930e7468fSPeter Dunlap * Return value reflects whether the logout command completed -- 260030e7468fSPeter Dunlap * regardless of the return value the connection is closed and 260130e7468fSPeter Dunlap * ready for reconnection. 260230e7468fSPeter Dunlap */ 2603fcf3ce44SJohn Forte return (rval); 2604fcf3ce44SJohn Forte } 2605fcf3ce44SJohn Forte 260630e7468fSPeter Dunlap 2607fcf3ce44SJohn Forte /* 2608fcf3ce44SJohn Forte * iscsi_handle_text - main control function for iSCSI text requests. This 2609fcf3ce44SJohn Forte * function handles allocating the command, sending initial text request, and 2610fcf3ce44SJohn Forte * handling long response sequence. 2611fcf3ce44SJohn Forte * If a data overflow condition occurs, iscsi_handle_text continues to 2612fcf3ce44SJohn Forte * receive responses until the all data has been recieved. This allows 2613fcf3ce44SJohn Forte * the full data length to be returned to the caller. 2614fcf3ce44SJohn Forte */ 2615fcf3ce44SJohn Forte iscsi_status_t 2616fcf3ce44SJohn Forte iscsi_handle_text(iscsi_conn_t *icp, char *buf, uint32_t buf_len, 2617fcf3ce44SJohn Forte uint32_t data_len, uint32_t *rx_data_len) 2618fcf3ce44SJohn Forte { 2619fcf3ce44SJohn Forte iscsi_sess_t *isp; 2620fcf3ce44SJohn Forte iscsi_cmd_t *icmdp; 2621fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2622fcf3ce44SJohn Forte 2623fcf3ce44SJohn Forte ASSERT(icp != NULL); 2624fcf3ce44SJohn Forte ASSERT(buf != NULL); 2625fcf3ce44SJohn Forte ASSERT(rx_data_len != NULL); 2626fcf3ce44SJohn Forte 2627fcf3ce44SJohn Forte isp = icp->conn_sess; 2628fcf3ce44SJohn Forte ASSERT(isp != NULL); 2629fcf3ce44SJohn Forte 2630fcf3ce44SJohn Forte /* 2631fcf3ce44SJohn Forte * Ensure data for text request command is not greater 2632fcf3ce44SJohn Forte * than the negotiated maximum receive data seqment length. 2633fcf3ce44SJohn Forte * 2634fcf3ce44SJohn Forte * Although iSCSI allows for long text requests (multiple 2635fcf3ce44SJohn Forte * pdus), this function places a restriction on text 2636fcf3ce44SJohn Forte * requests to ensure it is handled by a single PDU. 2637fcf3ce44SJohn Forte */ 2638fcf3ce44SJohn Forte if (data_len > icp->conn_params.max_xmit_data_seg_len) { 2639fcf3ce44SJohn Forte return (ISCSI_STATUS_CMD_FAILED); 2640fcf3ce44SJohn Forte } 2641fcf3ce44SJohn Forte 2642fcf3ce44SJohn Forte icmdp = iscsi_cmd_alloc(icp, KM_SLEEP); 2643fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2644fcf3ce44SJohn Forte 2645fcf3ce44SJohn Forte icmdp->cmd_type = ISCSI_CMD_TYPE_TEXT; 2646fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_SUCCESS; 2647d233de7eSJack Meng icmdp->cmd_misc_flags &= ~ISCSI_CMD_MISCFLAG_FREE; 2648fcf3ce44SJohn Forte icmdp->cmd_completed = B_FALSE; 2649fcf3ce44SJohn Forte 2650fcf3ce44SJohn Forte icmdp->cmd_un.text.buf = buf; 2651fcf3ce44SJohn Forte icmdp->cmd_un.text.buf_len = buf_len; 2652fcf3ce44SJohn Forte icmdp->cmd_un.text.offset = 0; 2653fcf3ce44SJohn Forte icmdp->cmd_un.text.data_len = data_len; 2654fcf3ce44SJohn Forte icmdp->cmd_un.text.total_rx_len = 0; 2655fcf3ce44SJohn Forte icmdp->cmd_un.text.ttt = ISCSI_RSVD_TASK_TAG; 2656fcf3ce44SJohn Forte icmdp->cmd_un.text.stage = ISCSI_CMD_TEXT_INITIAL_REQ; 2657fcf3ce44SJohn Forte 2658fcf3ce44SJohn Forte long_text_response: 2659fcf3ce44SJohn Forte mutex_enter(&isp->sess_state_mutex); 2660fcf3ce44SJohn Forte if (!ISCSI_SESS_STATE_FULL_FEATURE(isp->sess_state)) { 2661fcf3ce44SJohn Forte iscsi_cmd_free(icmdp); 2662fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 2663fcf3ce44SJohn Forte return (ISCSI_STATUS_NO_CONN_LOGGED_IN); 2664fcf3ce44SJohn Forte } 2665fcf3ce44SJohn Forte 2666fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 2667fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E1, isp); 2668fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 2669fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 2670fcf3ce44SJohn Forte 2671fcf3ce44SJohn Forte /* stall until completed */ 2672fcf3ce44SJohn Forte mutex_enter(&icmdp->cmd_mutex); 2673fcf3ce44SJohn Forte while (icmdp->cmd_completed == B_FALSE) { 2674fcf3ce44SJohn Forte cv_wait(&icmdp->cmd_completion, &icmdp->cmd_mutex); 2675fcf3ce44SJohn Forte } 2676fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 2677fcf3ce44SJohn Forte 2678fcf3ce44SJohn Forte /* 2679fcf3ce44SJohn Forte * check if error occured. If data overflow occured, continue on 2680fcf3ce44SJohn Forte * to ensure we get all data so that the full data length can be 2681fcf3ce44SJohn Forte * returned to the user 2682fcf3ce44SJohn Forte */ 2683fcf3ce44SJohn Forte if ((icmdp->cmd_result != ISCSI_STATUS_SUCCESS) && 2684fcf3ce44SJohn Forte (icmdp->cmd_result != ISCSI_STATUS_DATA_OVERFLOW)) { 2685fcf3ce44SJohn Forte cmn_err(CE_NOTE, "iscsi: SendTarget discovery failed (%d)", 2686fcf3ce44SJohn Forte icmdp->cmd_result); 2687fcf3ce44SJohn Forte rval = icmdp->cmd_result; 2688fcf3ce44SJohn Forte iscsi_cmd_free(icmdp); 2689fcf3ce44SJohn Forte return (rval); 2690fcf3ce44SJohn Forte } 2691fcf3ce44SJohn Forte 2692fcf3ce44SJohn Forte /* check if this was a partial text PDU */ 2693fcf3ce44SJohn Forte if (icmdp->cmd_un.text.stage != ISCSI_CMD_TEXT_FINAL_RSP) { 2694fcf3ce44SJohn Forte /* 2695fcf3ce44SJohn Forte * If a paritial text rexponse received, send an empty 2696fcf3ce44SJohn Forte * text request. This follows the behaviour specified 2697fcf3ce44SJohn Forte * in RFC3720 regarding long text responses. 2698fcf3ce44SJohn Forte */ 2699d233de7eSJack Meng icmdp->cmd_misc_flags &= ~ISCSI_CMD_MISCFLAG_FREE; 2700fcf3ce44SJohn Forte icmdp->cmd_completed = B_FALSE; 2701fcf3ce44SJohn Forte icmdp->cmd_un.text.data_len = 0; 2702fcf3ce44SJohn Forte icmdp->cmd_un.text.stage = ISCSI_CMD_TEXT_CONTINUATION; 2703fcf3ce44SJohn Forte goto long_text_response; 2704fcf3ce44SJohn Forte } 2705fcf3ce44SJohn Forte 2706fcf3ce44SJohn Forte /* 2707fcf3ce44SJohn Forte * set total received data length. If data overflow this would be 2708fcf3ce44SJohn Forte * amount of data that would have been received if buffer large 2709fcf3ce44SJohn Forte * enough. 2710fcf3ce44SJohn Forte */ 2711fcf3ce44SJohn Forte *rx_data_len = icmdp->cmd_un.text.total_rx_len; 2712fcf3ce44SJohn Forte 2713fcf3ce44SJohn Forte /* copy rval */ 2714fcf3ce44SJohn Forte rval = icmdp->cmd_result; 2715fcf3ce44SJohn Forte 2716fcf3ce44SJohn Forte /* clean up */ 2717fcf3ce44SJohn Forte iscsi_cmd_free(icmdp); 2718fcf3ce44SJohn Forte 2719fcf3ce44SJohn Forte return (rval); 2720fcf3ce44SJohn Forte } 2721fcf3ce44SJohn Forte 2722fcf3ce44SJohn Forte /* 2723fcf3ce44SJohn Forte * iscsi_handle_passthru - This function is used to send a uscsi_cmd 2724fcf3ce44SJohn Forte * to a specific target lun. This routine is used for internal purposes 2725fcf3ce44SJohn Forte * during enumeration and via the ISCSI_USCSICMD IOCTL. We restrict 2726fcf3ce44SJohn Forte * the CDBs that can be issued to a target/lun to INQUIRY, REPORT_LUNS, 2727fcf3ce44SJohn Forte * and READ_CAPACITY for security purposes. 2728fcf3ce44SJohn Forte * 2729fcf3ce44SJohn Forte * The logic here is broken into three phases. 2730fcf3ce44SJohn Forte * 1) Allocate and initialize a pkt/icmdp 2731fcf3ce44SJohn Forte * 2) Send the pkt/icmdp 2732fcf3ce44SJohn Forte * 3) cv_wait for completion 2733fcf3ce44SJohn Forte */ 2734fcf3ce44SJohn Forte iscsi_status_t 2735fcf3ce44SJohn Forte iscsi_handle_passthru(iscsi_sess_t *isp, uint16_t lun, struct uscsi_cmd *ucmdp) 2736fcf3ce44SJohn Forte { 2737fcf3ce44SJohn Forte iscsi_status_t rval = ISCSI_STATUS_SUCCESS; 2738fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 2739fcf3ce44SJohn Forte struct scsi_pkt *pkt = NULL; 2740fcf3ce44SJohn Forte struct buf *bp = NULL; 2741fcf3ce44SJohn Forte struct scsi_arq_status *arqstat = NULL; 2742fcf3ce44SJohn Forte int rqlen = SENSE_LENGTH; 2743fcf3ce44SJohn Forte 2744fcf3ce44SJohn Forte ASSERT(isp != NULL); 2745fcf3ce44SJohn Forte ASSERT(ucmdp != NULL); 2746fcf3ce44SJohn Forte 2747fcf3ce44SJohn Forte /* 2748fcf3ce44SJohn Forte * If the caller didn't provide a sense buffer we need 2749fcf3ce44SJohn Forte * to allocation one to get the scsi status. 2750fcf3ce44SJohn Forte */ 2751fcf3ce44SJohn Forte if (ucmdp->uscsi_rqlen > SENSE_LENGTH) { 2752fcf3ce44SJohn Forte rqlen = ucmdp->uscsi_rqlen; 2753fcf3ce44SJohn Forte } 2754fcf3ce44SJohn Forte 2755fcf3ce44SJohn Forte /* 2756fcf3ce44SJohn Forte * Step 1. Setup structs - KM_SLEEP will always succeed 2757fcf3ce44SJohn Forte */ 2758fcf3ce44SJohn Forte bp = kmem_zalloc(sizeof (struct buf), KM_SLEEP); 2759fcf3ce44SJohn Forte ASSERT(bp != NULL); 2760fcf3ce44SJohn Forte pkt = kmem_zalloc(sizeof (struct scsi_pkt), KM_SLEEP); 2761fcf3ce44SJohn Forte ASSERT(pkt != NULL); 2762fcf3ce44SJohn Forte icmdp = iscsi_cmd_alloc(NULL, KM_SLEEP); 2763fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2764fcf3ce44SJohn Forte 2765fcf3ce44SJohn Forte /* setup bp structure */ 2766fcf3ce44SJohn Forte bp->b_flags = B_READ; 2767fcf3ce44SJohn Forte bp->b_bcount = ucmdp->uscsi_buflen; 2768fcf3ce44SJohn Forte bp->b_un.b_addr = ucmdp->uscsi_bufaddr; 2769fcf3ce44SJohn Forte 2770fcf3ce44SJohn Forte /* setup scsi_pkt structure */ 2771fcf3ce44SJohn Forte pkt->pkt_ha_private = icmdp; 2772fcf3ce44SJohn Forte pkt->pkt_scbp = kmem_zalloc(rqlen, KM_SLEEP); 2773fcf3ce44SJohn Forte pkt->pkt_cdbp = kmem_zalloc(ucmdp->uscsi_cdblen, KM_SLEEP); 2774fcf3ce44SJohn Forte /* callback routine for passthru, will wake cv_wait */ 2775fcf3ce44SJohn Forte pkt->pkt_comp = iscsi_handle_passthru_callback; 2776fcf3ce44SJohn Forte pkt->pkt_time = ucmdp->uscsi_timeout; 2777fcf3ce44SJohn Forte 2778fcf3ce44SJohn Forte /* setup iscsi_cmd structure */ 2779fcf3ce44SJohn Forte icmdp->cmd_lun = NULL; 2780fcf3ce44SJohn Forte icmdp->cmd_type = ISCSI_CMD_TYPE_SCSI; 2781fcf3ce44SJohn Forte icmdp->cmd_un.scsi.lun = lun; 2782fcf3ce44SJohn Forte icmdp->cmd_un.scsi.pkt = pkt; 2783fcf3ce44SJohn Forte icmdp->cmd_un.scsi.bp = bp; 2784fcf3ce44SJohn Forte bcopy(ucmdp->uscsi_cdb, pkt->pkt_cdbp, ucmdp->uscsi_cdblen); 2785fcf3ce44SJohn Forte icmdp->cmd_un.scsi.cmdlen = ucmdp->uscsi_cdblen; 2786fcf3ce44SJohn Forte icmdp->cmd_un.scsi.statuslen = rqlen; 2787fcf3ce44SJohn Forte icmdp->cmd_crc_error_seen = B_FALSE; 2788fcf3ce44SJohn Forte icmdp->cmd_completed = B_FALSE; 2789fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_SUCCESS; 2790fcf3ce44SJohn Forte 2791fcf3ce44SJohn Forte /* 2792fcf3ce44SJohn Forte * Step 2. Push IO onto pending queue. If we aren't in 2793fcf3ce44SJohn Forte * FULL_FEATURE we need to fail the IO. 2794fcf3ce44SJohn Forte */ 2795fcf3ce44SJohn Forte mutex_enter(&isp->sess_state_mutex); 2796fcf3ce44SJohn Forte if (!ISCSI_SESS_STATE_FULL_FEATURE(isp->sess_state)) { 2797fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 2798fcf3ce44SJohn Forte 2799fcf3ce44SJohn Forte iscsi_cmd_free(icmdp); 2800fcf3ce44SJohn Forte kmem_free(pkt->pkt_cdbp, ucmdp->uscsi_cdblen); 2801fcf3ce44SJohn Forte kmem_free(pkt->pkt_scbp, rqlen); 2802fcf3ce44SJohn Forte kmem_free(pkt, sizeof (struct scsi_pkt)); 2803fcf3ce44SJohn Forte kmem_free(bp, sizeof (struct buf)); 2804fcf3ce44SJohn Forte 2805fcf3ce44SJohn Forte return (ISCSI_STATUS_CMD_FAILED); 2806fcf3ce44SJohn Forte } 2807fcf3ce44SJohn Forte 2808fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 2809fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E1, isp); 2810fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 2811fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 2812fcf3ce44SJohn Forte 2813fcf3ce44SJohn Forte /* 2814fcf3ce44SJohn Forte * Step 3. Wait on cv_wait for completion routine 2815fcf3ce44SJohn Forte */ 2816fcf3ce44SJohn Forte mutex_enter(&icmdp->cmd_mutex); 2817fcf3ce44SJohn Forte while (icmdp->cmd_completed == B_FALSE) { 2818fcf3ce44SJohn Forte cv_wait(&icmdp->cmd_completion, &icmdp->cmd_mutex); 2819fcf3ce44SJohn Forte } 2820fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 2821fcf3ce44SJohn Forte 2822fcf3ce44SJohn Forte /* copy rval */ 2823fcf3ce44SJohn Forte rval = icmdp->cmd_result; 2824fcf3ce44SJohn Forte 2825fcf3ce44SJohn Forte ucmdp->uscsi_resid = pkt->pkt_resid; 2826fcf3ce44SJohn Forte 2827fcf3ce44SJohn Forte /* update scsi status */ 2828fcf3ce44SJohn Forte arqstat = (struct scsi_arq_status *)pkt->pkt_scbp; 2829fcf3ce44SJohn Forte ucmdp->uscsi_status = ((char *)&arqstat->sts_status)[0]; 2830fcf3ce44SJohn Forte 2831fcf3ce44SJohn Forte /* copy request sense buffers if caller gave space */ 2832fcf3ce44SJohn Forte if ((ucmdp->uscsi_rqlen > 0) && 2833fcf3ce44SJohn Forte (ucmdp->uscsi_rqbuf != NULL)) { 2834fcf3ce44SJohn Forte bcopy(arqstat, ucmdp->uscsi_rqbuf, 2835fcf3ce44SJohn Forte MIN(sizeof (struct scsi_arq_status), rqlen)); 2836fcf3ce44SJohn Forte } 2837fcf3ce44SJohn Forte 2838fcf3ce44SJohn Forte /* clean up */ 2839fcf3ce44SJohn Forte iscsi_cmd_free(icmdp); 2840fcf3ce44SJohn Forte kmem_free(pkt->pkt_cdbp, ucmdp->uscsi_cdblen); 2841fcf3ce44SJohn Forte kmem_free(pkt->pkt_scbp, rqlen); 2842fcf3ce44SJohn Forte kmem_free(pkt, sizeof (struct scsi_pkt)); 2843fcf3ce44SJohn Forte kmem_free(bp, sizeof (struct buf)); 2844fcf3ce44SJohn Forte 2845fcf3ce44SJohn Forte return (rval); 2846fcf3ce44SJohn Forte } 2847fcf3ce44SJohn Forte 2848fcf3ce44SJohn Forte 2849fcf3ce44SJohn Forte /* 2850fcf3ce44SJohn Forte * iscsi_handle_passthru_callback - 2851fcf3ce44SJohn Forte * 2852fcf3ce44SJohn Forte */ 2853fcf3ce44SJohn Forte static void 2854fcf3ce44SJohn Forte iscsi_handle_passthru_callback(struct scsi_pkt *pkt) 2855fcf3ce44SJohn Forte { 2856fcf3ce44SJohn Forte iscsi_cmd_t *icmdp = NULL; 2857fcf3ce44SJohn Forte 2858fcf3ce44SJohn Forte ASSERT(pkt != NULL); 2859fcf3ce44SJohn Forte icmdp = (iscsi_cmd_t *)pkt->pkt_ha_private; 2860fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 2861fcf3ce44SJohn Forte 2862fcf3ce44SJohn Forte mutex_enter(&icmdp->cmd_mutex); 2863fcf3ce44SJohn Forte icmdp->cmd_completed = B_TRUE; 2864fcf3ce44SJohn Forte icmdp->cmd_result = ISCSI_STATUS_SUCCESS; 2865fcf3ce44SJohn Forte cv_broadcast(&icmdp->cmd_completion); 2866fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 2867fcf3ce44SJohn Forte 2868fcf3ce44SJohn Forte } 2869fcf3ce44SJohn Forte 287030e7468fSPeter Dunlap /* 287130e7468fSPeter Dunlap * IDM callbacks 287230e7468fSPeter Dunlap */ 287330e7468fSPeter Dunlap void 287430e7468fSPeter Dunlap iscsi_build_hdr(idm_task_t *idm_task, idm_pdu_t *pdu, uint8_t opcode) 287530e7468fSPeter Dunlap { 287630e7468fSPeter Dunlap iscsi_cmd_t *icmdp = idm_task->idt_private; 287730e7468fSPeter Dunlap iscsi_conn_t *icp = icmdp->cmd_conn; 287830e7468fSPeter Dunlap iscsi_data_hdr_t *ihp = (iscsi_data_hdr_t *)pdu->isp_hdr; 287930e7468fSPeter Dunlap 288030e7468fSPeter Dunlap mutex_enter(&icmdp->cmd_mutex); 288130e7468fSPeter Dunlap if (opcode == ISCSI_OP_SCSI_DATA) { 288230e7468fSPeter Dunlap uint32_t data_sn; 288330e7468fSPeter Dunlap uint32_t lun; 288430e7468fSPeter Dunlap icmdp = idm_task->idt_private; 288530e7468fSPeter Dunlap icp = icmdp->cmd_conn; 288630e7468fSPeter Dunlap ihp->opcode = opcode; 288730e7468fSPeter Dunlap ihp->itt = icmdp->cmd_itt; 288830e7468fSPeter Dunlap ihp->ttt = idm_task->idt_r2t_ttt; 288930e7468fSPeter Dunlap ihp->expstatsn = htonl(icp->conn_expstatsn); 289030e7468fSPeter Dunlap icp->conn_laststatsn = icp->conn_expstatsn; 289130e7468fSPeter Dunlap data_sn = ntohl(ihp->datasn); 289230e7468fSPeter Dunlap data_sn++; 289330e7468fSPeter Dunlap lun = icmdp->cmd_un.scsi.lun; 289430e7468fSPeter Dunlap ISCSI_LUN_BYTE_COPY(ihp->lun, lun); 289530e7468fSPeter Dunlap /* CRM: upate_flow_control */ 289630e7468fSPeter Dunlap ISCSI_IO_LOG(CE_NOTE, "DEBUG: iscsi_build_hdr" 289730e7468fSPeter Dunlap "(ISCSI_OP_SCSI_DATA): task: %p icp: %p ic: %p itt: %x " 289830e7468fSPeter Dunlap "exp: %d data_sn: %d", (void *)idm_task, (void *)icp, 289930e7468fSPeter Dunlap (void *)icp->conn_ic, ihp->itt, icp->conn_expstatsn, 290030e7468fSPeter Dunlap data_sn); 290130e7468fSPeter Dunlap } else { 290230e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi_build_hdr: unprocessed build " 290330e7468fSPeter Dunlap "header opcode: %x", opcode); 290430e7468fSPeter Dunlap } 290530e7468fSPeter Dunlap mutex_exit(&icmdp->cmd_mutex); 290630e7468fSPeter Dunlap } 290730e7468fSPeter Dunlap 290830e7468fSPeter Dunlap static void 290930e7468fSPeter Dunlap iscsi_process_rsp_status(iscsi_sess_t *isp, iscsi_conn_t *icp, 291030e7468fSPeter Dunlap idm_status_t status) 291130e7468fSPeter Dunlap { 291230e7468fSPeter Dunlap switch (status) { 291330e7468fSPeter Dunlap case IDM_STATUS_SUCCESS: 291430e7468fSPeter Dunlap if ((isp->sess_state == ISCSI_SESS_STATE_IN_FLUSH) && 291530e7468fSPeter Dunlap (icp->conn_queue_active.count == 0)) { 291630e7468fSPeter Dunlap iscsi_drop_conn_cleanup(icp); 291730e7468fSPeter Dunlap } 291830e7468fSPeter Dunlap break; 291930e7468fSPeter Dunlap case IDM_STATUS_PROTOCOL_ERROR: 292030e7468fSPeter Dunlap KSTAT_INC_CONN_ERR_PROTOCOL(icp); 292130e7468fSPeter Dunlap iscsi_drop_conn_cleanup(icp); 292230e7468fSPeter Dunlap break; 292330e7468fSPeter Dunlap default: 292430e7468fSPeter Dunlap break; 292530e7468fSPeter Dunlap } 292630e7468fSPeter Dunlap } 292730e7468fSPeter Dunlap 292830e7468fSPeter Dunlap static void 292930e7468fSPeter Dunlap iscsi_drop_conn_cleanup(iscsi_conn_t *icp) { 293030e7468fSPeter Dunlap mutex_enter(&icp->conn_state_mutex); 293130e7468fSPeter Dunlap idm_ini_conn_disconnect(icp->conn_ic); 293230e7468fSPeter Dunlap mutex_exit(&icp->conn_state_mutex); 293330e7468fSPeter Dunlap } 293430e7468fSPeter Dunlap 293530e7468fSPeter Dunlap void 293630e7468fSPeter Dunlap iscsi_rx_error_pdu(idm_conn_t *ic, idm_pdu_t *pdu, idm_status_t status) 293730e7468fSPeter Dunlap { 293830e7468fSPeter Dunlap iscsi_conn_t *icp = (iscsi_conn_t *)ic->ic_handle; 293930e7468fSPeter Dunlap iscsi_sess_t *isp; 294030e7468fSPeter Dunlap 294130e7468fSPeter Dunlap ASSERT(icp != NULL); 294230e7468fSPeter Dunlap isp = icp->conn_sess; 294330e7468fSPeter Dunlap ASSERT(isp != NULL); 294430e7468fSPeter Dunlap iscsi_process_rsp_status(isp, icp, status); 294530e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 294630e7468fSPeter Dunlap } 294730e7468fSPeter Dunlap 294830e7468fSPeter Dunlap void 294930e7468fSPeter Dunlap iscsi_rx_misc_pdu(idm_conn_t *ic, idm_pdu_t *pdu) 295030e7468fSPeter Dunlap { 295130e7468fSPeter Dunlap iscsi_conn_t *icp; 295230e7468fSPeter Dunlap iscsi_hdr_t *ihp = (iscsi_hdr_t *)pdu->isp_hdr; 295330e7468fSPeter Dunlap iscsi_sess_t *isp; 295430e7468fSPeter Dunlap idm_status_t status; 295530e7468fSPeter Dunlap 295630e7468fSPeter Dunlap icp = ic->ic_handle; 295730e7468fSPeter Dunlap isp = icp->conn_sess; 295830e7468fSPeter Dunlap isp->sess_rx_lbolt = icp->conn_rx_lbolt = ddi_get_lbolt(); 295930e7468fSPeter Dunlap switch (ihp->opcode & ISCSI_OPCODE_MASK) { 296030e7468fSPeter Dunlap case ISCSI_OP_LOGIN_RSP: 296130e7468fSPeter Dunlap status = iscsi_rx_process_login_pdu(ic, pdu); 296230e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 296330e7468fSPeter Dunlap break; 296430e7468fSPeter Dunlap case ISCSI_OP_LOGOUT_RSP: 296530e7468fSPeter Dunlap status = iscsi_rx_process_logout_rsp(ic, pdu); 296630e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 296730e7468fSPeter Dunlap break; 296830e7468fSPeter Dunlap case ISCSI_OP_REJECT_MSG: 296930e7468fSPeter Dunlap status = iscsi_rx_process_reject_rsp(ic, pdu); 297030e7468fSPeter Dunlap break; 297130e7468fSPeter Dunlap case ISCSI_OP_SCSI_TASK_MGT_RSP: 297230e7468fSPeter Dunlap status = iscsi_rx_process_task_mgt_rsp(ic, pdu); 297330e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 297430e7468fSPeter Dunlap break; 297530e7468fSPeter Dunlap case ISCSI_OP_NOOP_IN: 297630e7468fSPeter Dunlap status = iscsi_rx_process_nop(ic, pdu); 297730e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 297830e7468fSPeter Dunlap break; 297930e7468fSPeter Dunlap case ISCSI_OP_ASYNC_EVENT: 298030e7468fSPeter Dunlap status = iscsi_rx_process_async_rsp(ic, pdu); 298130e7468fSPeter Dunlap break; 298230e7468fSPeter Dunlap case ISCSI_OP_TEXT_RSP: 298330e7468fSPeter Dunlap status = iscsi_rx_process_text_rsp(ic, pdu); 298430e7468fSPeter Dunlap idm_pdu_complete(pdu, status); 298530e7468fSPeter Dunlap break; 298630e7468fSPeter Dunlap default: 298730e7468fSPeter Dunlap cmn_err(CE_WARN, "iscsi connection(%u) protocol error " 298830e7468fSPeter Dunlap "- received misc unsupported opcode 0x%02x", 298930e7468fSPeter Dunlap icp->conn_oid, ihp->opcode); 299030e7468fSPeter Dunlap status = IDM_STATUS_PROTOCOL_ERROR; 299130e7468fSPeter Dunlap break; 299230e7468fSPeter Dunlap } 299330e7468fSPeter Dunlap iscsi_process_rsp_status(isp, icp, status); 299430e7468fSPeter Dunlap } 299530e7468fSPeter Dunlap 2996fcf3ce44SJohn Forte /* 2997fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 2998fcf3ce44SJohn Forte * | Beginning of completion routines | 2999fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3000fcf3ce44SJohn Forte */ 3001fcf3ce44SJohn Forte 3002fcf3ce44SJohn Forte /* 3003fcf3ce44SJohn Forte * iscsi_ic_thread - 3004fcf3ce44SJohn Forte */ 3005fcf3ce44SJohn Forte void 3006fcf3ce44SJohn Forte iscsi_ic_thread(iscsi_thread_t *thread, void *arg) 3007fcf3ce44SJohn Forte { 3008fcf3ce44SJohn Forte iscsi_sess_t *isp = (iscsi_sess_t *)arg; 3009fcf3ce44SJohn Forte int ret; 3010fcf3ce44SJohn Forte iscsi_queue_t q; 3011fcf3ce44SJohn Forte iscsi_cmd_t *icmdp; 3012fcf3ce44SJohn Forte iscsi_cmd_t *next_icmdp; 3013fcf3ce44SJohn Forte 3014fcf3ce44SJohn Forte ASSERT(isp != NULL); 3015fcf3ce44SJohn Forte ASSERT(thread != NULL); 3016fcf3ce44SJohn Forte ASSERT(thread->signature == SIG_ISCSI_THREAD); 3017fcf3ce44SJohn Forte 3018fcf3ce44SJohn Forte for (;;) { 3019fcf3ce44SJohn Forte 3020fcf3ce44SJohn Forte /* 3021fcf3ce44SJohn Forte * We wait till iodone or somebody else wakes us up. 3022fcf3ce44SJohn Forte */ 3023fcf3ce44SJohn Forte ret = iscsi_thread_wait(thread, -1); 3024fcf3ce44SJohn Forte 3025fcf3ce44SJohn Forte /* 3026fcf3ce44SJohn Forte * The value should never be negative since we never timeout. 3027fcf3ce44SJohn Forte */ 3028fcf3ce44SJohn Forte ASSERT(ret >= 0); 3029fcf3ce44SJohn Forte 3030fcf3ce44SJohn Forte q.count = 0; 3031fcf3ce44SJohn Forte q.head = NULL; 3032fcf3ce44SJohn Forte q.tail = NULL; 3033fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_completion.mutex); 3034fcf3ce44SJohn Forte icmdp = isp->sess_queue_completion.head; 3035fcf3ce44SJohn Forte while (icmdp != NULL) { 3036fcf3ce44SJohn Forte next_icmdp = icmdp->cmd_next; 3037fcf3ce44SJohn Forte mutex_enter(&icmdp->cmd_mutex); 3038fcf3ce44SJohn Forte /* 3039fcf3ce44SJohn Forte * check if the associated r2t/abort has finished 304030e7468fSPeter Dunlap * yet. If not, don't complete the command. 3041fcf3ce44SJohn Forte */ 3042fcf3ce44SJohn Forte if ((icmdp->cmd_un.scsi.r2t_icmdp == NULL) && 304330e7468fSPeter Dunlap (icmdp->cmd_un.scsi.abort_icmdp == NULL)) { 3044fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 3045fcf3ce44SJohn Forte (void) iscsi_dequeue_cmd(&isp-> 3046fcf3ce44SJohn Forte sess_queue_completion.head, 3047fcf3ce44SJohn Forte &isp->sess_queue_completion.tail, 3048fcf3ce44SJohn Forte icmdp); 3049fcf3ce44SJohn Forte --isp->sess_queue_completion.count; 3050fcf3ce44SJohn Forte iscsi_enqueue_cmd_head(&q.head, 3051fcf3ce44SJohn Forte &q.tail, icmdp); 305230e7468fSPeter Dunlap } else { 3053fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 305430e7468fSPeter Dunlap } 3055fcf3ce44SJohn Forte icmdp = next_icmdp; 3056fcf3ce44SJohn Forte } 3057fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_completion.mutex); 3058fcf3ce44SJohn Forte icmdp = q.head; 3059fcf3ce44SJohn Forte while (icmdp != NULL) { 3060fcf3ce44SJohn Forte next_icmdp = icmdp->cmd_next; 3061fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E8, isp); 3062fcf3ce44SJohn Forte icmdp = next_icmdp; 3063fcf3ce44SJohn Forte } 3064fcf3ce44SJohn Forte 3065fcf3ce44SJohn Forte if (ret > 0) 3066fcf3ce44SJohn Forte /* Somebody woke us up to work */ 3067fcf3ce44SJohn Forte continue; 3068fcf3ce44SJohn Forte else 3069fcf3ce44SJohn Forte /* 3070fcf3ce44SJohn Forte * Somebody woke us up to kill ourselves. We will 3071fcf3ce44SJohn Forte * make sure, however that the completion queue is 3072fcf3ce44SJohn Forte * empty before leaving. After we've done that it 3073fcf3ce44SJohn Forte * is the originator of the signal that has to make 3074fcf3ce44SJohn Forte * sure no other SCSI command is posted. 3075fcf3ce44SJohn Forte */ 3076fcf3ce44SJohn Forte break; 3077fcf3ce44SJohn Forte } 3078fcf3ce44SJohn Forte 3079fcf3ce44SJohn Forte } 3080fcf3ce44SJohn Forte 3081fcf3ce44SJohn Forte /* 3082fcf3ce44SJohn Forte * iscsi_iodone - 3083fcf3ce44SJohn Forte * 3084fcf3ce44SJohn Forte */ 3085fcf3ce44SJohn Forte void 3086fcf3ce44SJohn Forte iscsi_iodone(iscsi_sess_t *isp, iscsi_cmd_t *icmdp) 3087fcf3ce44SJohn Forte { 3088fcf3ce44SJohn Forte struct scsi_pkt *pkt = NULL; 3089fcf3ce44SJohn Forte struct buf *bp = icmdp->cmd_un.scsi.bp; 3090fcf3ce44SJohn Forte 3091fcf3ce44SJohn Forte ASSERT(isp != NULL); 3092fcf3ce44SJohn Forte ASSERT(icmdp != NULL); 3093fcf3ce44SJohn Forte pkt = icmdp->cmd_un.scsi.pkt; 3094fcf3ce44SJohn Forte ASSERT(pkt != NULL); 3095fcf3ce44SJohn Forte 3096fcf3ce44SJohn Forte ASSERT(icmdp->cmd_un.scsi.abort_icmdp == NULL); 3097fcf3ce44SJohn Forte ASSERT(icmdp->cmd_un.scsi.r2t_icmdp == NULL); 3098fcf3ce44SJohn Forte if (pkt->pkt_reason == CMD_CMPLT) { 3099fcf3ce44SJohn Forte if (bp) { 3100fcf3ce44SJohn Forte if (bp->b_flags & B_READ) { 3101fcf3ce44SJohn Forte KSTAT_SESS_RX_IO_DONE(isp, bp->b_bcount); 3102fcf3ce44SJohn Forte } else { 3103fcf3ce44SJohn Forte KSTAT_SESS_TX_IO_DONE(isp, bp->b_bcount); 3104fcf3ce44SJohn Forte } 3105fcf3ce44SJohn Forte } 3106fcf3ce44SJohn Forte } 3107fcf3ce44SJohn Forte 3108fcf3ce44SJohn Forte if (pkt->pkt_flags & FLAG_NOINTR) { 3109fcf3ce44SJohn Forte cv_broadcast(&icmdp->cmd_completion); 3110fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 3111fcf3ce44SJohn Forte } else { 3112fcf3ce44SJohn Forte /* 3113fcf3ce44SJohn Forte * Release mutex. As soon as callback is 3114fcf3ce44SJohn Forte * issued the caller may destroy the command. 3115fcf3ce44SJohn Forte */ 3116fcf3ce44SJohn Forte mutex_exit(&icmdp->cmd_mutex); 3117fcf3ce44SJohn Forte /* 3118fcf3ce44SJohn Forte * We can't just directly call the pk_comp routine. In 3119fcf3ce44SJohn Forte * many error cases the target driver will use the calling 3120fcf3ce44SJohn Forte * thread to re-drive error handling (reset, retries...) 3121fcf3ce44SJohn Forte * back into the hba driver (iscsi). If the target redrives 3122fcf3ce44SJohn Forte * a reset back into the iscsi driver off this thead we have 3123fcf3ce44SJohn Forte * a chance of deadlocking. So instead use the io completion 3124fcf3ce44SJohn Forte * thread. 3125fcf3ce44SJohn Forte */ 3126fcf3ce44SJohn Forte (*icmdp->cmd_un.scsi.pkt->pkt_comp)(icmdp->cmd_un.scsi.pkt); 3127fcf3ce44SJohn Forte } 3128fcf3ce44SJohn Forte } 3129fcf3ce44SJohn Forte 3130fcf3ce44SJohn Forte /* 3131fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3132fcf3ce44SJohn Forte * | End of completion routines | 3133fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3134fcf3ce44SJohn Forte */ 3135fcf3ce44SJohn Forte 3136fcf3ce44SJohn Forte /* 3137fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3138fcf3ce44SJohn Forte * | Beginning of watchdog routines | 3139fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3140fcf3ce44SJohn Forte */ 3141fcf3ce44SJohn Forte 3142fcf3ce44SJohn Forte /* 3143fcf3ce44SJohn Forte * iscsi_watchdog_thread - 3144fcf3ce44SJohn Forte * 3145fcf3ce44SJohn Forte */ 3146fcf3ce44SJohn Forte void 3147fcf3ce44SJohn Forte iscsi_wd_thread(iscsi_thread_t *thread, void *arg) 3148fcf3ce44SJohn Forte { 3149fcf3ce44SJohn Forte iscsi_sess_t *isp = (iscsi_sess_t *)arg; 3150fcf3ce44SJohn Forte int rc = 1; 3151fcf3ce44SJohn Forte 3152fcf3ce44SJohn Forte ASSERT(isp != NULL); 3153fcf3ce44SJohn Forte 3154fcf3ce44SJohn Forte while (rc != NULL) { 3155fcf3ce44SJohn Forte 3156fcf3ce44SJohn Forte iscsi_timeout_checks(isp); 3157fcf3ce44SJohn Forte iscsi_nop_checks(isp); 3158fcf3ce44SJohn Forte 3159fcf3ce44SJohn Forte rc = iscsi_thread_wait(thread, SEC_TO_TICK(1)); 3160fcf3ce44SJohn Forte } 3161fcf3ce44SJohn Forte } 3162fcf3ce44SJohn Forte 3163fcf3ce44SJohn Forte /* 3164fcf3ce44SJohn Forte * iscsi_timeout_checks - 3165fcf3ce44SJohn Forte * 3166fcf3ce44SJohn Forte */ 3167fcf3ce44SJohn Forte static void 3168fcf3ce44SJohn Forte iscsi_timeout_checks(iscsi_sess_t *isp) 3169fcf3ce44SJohn Forte { 3170fcf3ce44SJohn Forte clock_t now = ddi_get_lbolt(); 3171fcf3ce44SJohn Forte iscsi_conn_t *icp; 317230e7468fSPeter Dunlap iscsi_cmd_t *icmdp, *nicmdp; 3173fcf3ce44SJohn Forte 3174fcf3ce44SJohn Forte ASSERT(isp != NULL); 3175fcf3ce44SJohn Forte 3176fcf3ce44SJohn Forte /* PENDING */ 3177fcf3ce44SJohn Forte mutex_enter(&isp->sess_state_mutex); 3178fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 3179fcf3ce44SJohn Forte for (icmdp = isp->sess_queue_pending.head; 3180fcf3ce44SJohn Forte icmdp; icmdp = nicmdp) { 3181fcf3ce44SJohn Forte nicmdp = icmdp->cmd_next; 3182fcf3ce44SJohn Forte 3183fcf3ce44SJohn Forte /* Skip entries with no timeout */ 3184fcf3ce44SJohn Forte if (icmdp->cmd_lbolt_timeout == 0) 3185fcf3ce44SJohn Forte continue; 3186fcf3ce44SJohn Forte 3187fcf3ce44SJohn Forte /* 3188fcf3ce44SJohn Forte * Skip pending queue entries for cmd_type values that depend 3189fcf3ce44SJohn Forte * on having an open cmdsn window for successfull transition 3190fcf3ce44SJohn Forte * from pending to the active (i.e. ones that depend on 3191fcf3ce44SJohn Forte * sess_cmdsn .vs. sess_maxcmdsn). For them, the timer starts 3192fcf3ce44SJohn Forte * when they are successfully moved to the active queue by 3193fcf3ce44SJohn Forte * iscsi_cmd_state_pending() code. 3194fcf3ce44SJohn Forte */ 3195d233de7eSJack Meng /* 3196d233de7eSJack Meng * If the cmd is stuck, at least give it a chance 3197d233de7eSJack Meng * to timeout 3198d233de7eSJack Meng */ 3199d233de7eSJack Meng if (((icmdp->cmd_type == ISCSI_CMD_TYPE_SCSI) || 3200d233de7eSJack Meng (icmdp->cmd_type == ISCSI_CMD_TYPE_TEXT)) && 3201d233de7eSJack Meng !(icmdp->cmd_misc_flags & ISCSI_CMD_MISCFLAG_STUCK)) 3202fcf3ce44SJohn Forte continue; 3203fcf3ce44SJohn Forte 3204fcf3ce44SJohn Forte /* Skip if timeout still in the future */ 3205fcf3ce44SJohn Forte if (now <= icmdp->cmd_lbolt_timeout) 3206fcf3ce44SJohn Forte continue; 3207fcf3ce44SJohn Forte 3208fcf3ce44SJohn Forte /* timeout */ 3209fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E6, isp); 3210fcf3ce44SJohn Forte } 3211fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 3212fcf3ce44SJohn Forte mutex_exit(&isp->sess_state_mutex); 3213fcf3ce44SJohn Forte 3214fcf3ce44SJohn Forte rw_enter(&isp->sess_conn_list_rwlock, RW_READER); 3215fcf3ce44SJohn Forte icp = isp->sess_conn_list; 3216fcf3ce44SJohn Forte while (icp != NULL) { 3217fcf3ce44SJohn Forte 3218fcf3ce44SJohn Forte /* ACTIVE */ 3219fcf3ce44SJohn Forte mutex_enter(&icp->conn_state_mutex); 3220fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 3221fcf3ce44SJohn Forte mutex_enter(&icp->conn_queue_active.mutex); 3222fcf3ce44SJohn Forte for (icmdp = icp->conn_queue_active.head; 3223fcf3ce44SJohn Forte icmdp; icmdp = nicmdp) { 3224fcf3ce44SJohn Forte nicmdp = icmdp->cmd_next; 3225fcf3ce44SJohn Forte 3226fcf3ce44SJohn Forte /* Skip entries with no timeout */ 3227fcf3ce44SJohn Forte if (icmdp->cmd_lbolt_timeout == 0) 3228fcf3ce44SJohn Forte continue; 3229fcf3ce44SJohn Forte 3230fcf3ce44SJohn Forte /* Skip if command is not active */ 3231fcf3ce44SJohn Forte if (icmdp->cmd_state != ISCSI_CMD_STATE_ACTIVE) 3232fcf3ce44SJohn Forte continue; 3233fcf3ce44SJohn Forte 3234fcf3ce44SJohn Forte /* Skip if timeout still in the future */ 3235fcf3ce44SJohn Forte if (now <= icmdp->cmd_lbolt_timeout) 3236fcf3ce44SJohn Forte continue; 3237fcf3ce44SJohn Forte 3238fcf3ce44SJohn Forte /* timeout */ 3239fcf3ce44SJohn Forte iscsi_cmd_state_machine(icmdp, ISCSI_CMD_EVENT_E6, isp); 3240fcf3ce44SJohn Forte } 3241fcf3ce44SJohn Forte mutex_exit(&icp->conn_queue_active.mutex); 3242fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 3243fcf3ce44SJohn Forte mutex_exit(&icp->conn_state_mutex); 3244fcf3ce44SJohn Forte 3245fcf3ce44SJohn Forte icp = icp->conn_next; 3246fcf3ce44SJohn Forte } 3247fcf3ce44SJohn Forte rw_exit(&isp->sess_conn_list_rwlock); 3248fcf3ce44SJohn Forte } 3249fcf3ce44SJohn Forte 3250fcf3ce44SJohn Forte /* 3251fcf3ce44SJohn Forte * iscsi_nop_checks - sends a NOP on idle connections 3252fcf3ce44SJohn Forte * 3253fcf3ce44SJohn Forte * This function walks the connections on a session and 3254fcf3ce44SJohn Forte * issues NOPs on those connections that are in FULL 3255fcf3ce44SJohn Forte * FEATURE mode and have not received data for the 3256fcf3ce44SJohn Forte * time period specified by iscsi_nop_delay (global). 3257fcf3ce44SJohn Forte */ 3258fcf3ce44SJohn Forte static void 3259fcf3ce44SJohn Forte iscsi_nop_checks(iscsi_sess_t *isp) 3260fcf3ce44SJohn Forte { 3261fcf3ce44SJohn Forte iscsi_conn_t *icp; 3262fcf3ce44SJohn Forte 3263fcf3ce44SJohn Forte ASSERT(isp != NULL); 3264fcf3ce44SJohn Forte 3265fcf3ce44SJohn Forte if (isp->sess_type == ISCSI_SESS_TYPE_DISCOVERY) { 3266fcf3ce44SJohn Forte return; 3267fcf3ce44SJohn Forte } 3268fcf3ce44SJohn Forte 3269fcf3ce44SJohn Forte rw_enter(&isp->sess_conn_list_rwlock, RW_READER); 3270fcf3ce44SJohn Forte icp = isp->sess_conn_act; 3271fcf3ce44SJohn Forte if (icp != NULL) { 3272fcf3ce44SJohn Forte 3273fcf3ce44SJohn Forte mutex_enter(&icp->conn_state_mutex); 3274fcf3ce44SJohn Forte if ((ISCSI_CONN_STATE_FULL_FEATURE(icp->conn_state)) && 3275fcf3ce44SJohn Forte (ddi_get_lbolt() > isp->sess_conn_act->conn_rx_lbolt + 3276fcf3ce44SJohn Forte SEC_TO_TICK(iscsi_nop_delay)) && (ddi_get_lbolt() > 3277fcf3ce44SJohn Forte isp->sess_conn_act->conn_nop_lbolt + 3278fcf3ce44SJohn Forte SEC_TO_TICK(iscsi_nop_delay))) { 3279fcf3ce44SJohn Forte 3280fcf3ce44SJohn Forte /* 3281fcf3ce44SJohn Forte * We haven't received anything from the 3282fcf3ce44SJohn Forte * target is a defined period of time, 3283fcf3ce44SJohn Forte * send NOP to see if the target is alive. 3284fcf3ce44SJohn Forte */ 3285fcf3ce44SJohn Forte mutex_enter(&isp->sess_queue_pending.mutex); 3286fcf3ce44SJohn Forte iscsi_handle_nop(isp->sess_conn_act, 3287fcf3ce44SJohn Forte 0, ISCSI_RSVD_TASK_TAG); 3288fcf3ce44SJohn Forte mutex_exit(&isp->sess_queue_pending.mutex); 3289fcf3ce44SJohn Forte } 3290fcf3ce44SJohn Forte mutex_exit(&icp->conn_state_mutex); 3291fcf3ce44SJohn Forte 3292fcf3ce44SJohn Forte icp = icp->conn_next; 3293fcf3ce44SJohn Forte } 3294fcf3ce44SJohn Forte rw_exit(&isp->sess_conn_list_rwlock); 3295fcf3ce44SJohn Forte } 3296fcf3ce44SJohn Forte 3297fcf3ce44SJohn Forte /* 3298fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3299fcf3ce44SJohn Forte * | End of wd routines | 3300fcf3ce44SJohn Forte * +--------------------------------------------------------------------+ 3301fcf3ce44SJohn Forte */ 3302